Thursday, October 31, 2019

Old Testament and New Testament Essay Example | Topics and Well Written Essays - 1500 words

Old Testament and New Testament - Essay Example This essay analyzes and then compares the passages from the Old and the New Testament. The fact of similarities between them is well established, if one considers the fact that the prophecies of the Old Testament were fulfilled in the New Testament. The several ways that the passages of the New Testament and the Old Testament bear similarities shall be elaborated in this paper. Events like the Passover and the Last Supper justify the similarities between the New Testament and the Old Testament. The lives of great people in the Bible like Moses, David, Elijah, John and Jesus can also be used as a basis for comparison between the Old and the New Testament. The Last Supper was also a feast of unleavened bread just like the Passover in the book of Exodus. This is a clear sign that the Last Supper of Jesus with his twelve disciples evolved from the Passover in the book of Exodus. Another way that the New Testament fulfilled the prophecy or interpreted the message of the Old Testament was in the life of Moses. From the events that took place in the Bible and the characters of notable people in the Bible, it has been clearly shown that the New Testament is an interpreter of the Old Testament. The Old Testament and the New Testament were written by different authors that lived through different timelines, but the fact that the Bible as a whole was inspired by God shows that there must be a link between the Old Testament and the New Testament and it is this link that has been proven and established in this paper.

Tuesday, October 29, 2019

Reading and Writing with an Attitude Essay Example | Topics and Well Written Essays - 250 words

Reading and Writing with an Attitude - Essay Example Ultimately, although procrastination can adversely affect all forms of production and output, it is an especially bad habit with regards to the process of writing due to the fact that the writing process cannot be completed in a single sitting. As a function of the reading, planning, outlining, drafting, and revising process, it is necessary to budget a great deal of time for the writing process in order to make sure that it is complete and relevant to the subject matter or requirements that have been set out. Moreover, proofreading the finished product also takes time and seeking to make any last minute additions for relevance takes time as well. With regards to how I acquired this particular shortcoming, it can be simply enough understood that it was acquired as a result of improper time management early in my scholastic endeavors. With regards to the impacts that it has had, these can be understood to be wholly negative. Ultimately, as a means of correcting this habit, it has been necessary for me to seek to meticulously budget my time so that procrastination in the writing process cannot even be a

Sunday, October 27, 2019

Vehicle Anti-lock Braking Traction Control

Vehicle Anti-lock Braking Traction Control Understand vehicle anti-lock braking traction control and Integrated dynamic stability control systems.   Introduction I have learned that the anti-lock braking systems (ABS) are electronic systems that monitor and control wheel slip during vehicle braking, as well as the ABSs can improve vehicle control during braking, and reduce stopping distances on slippery road surfaces by limiting wheel slip and maintaining lockup. Also, the reducing wheel spin improves the vehicle stability and control during braking, since stability increases as wheel slip decreases. Assessment Criteria 2.1 It is correct to assume that due to the increased loads on steered wheels and wider tyres there is a large effort required at the steering wheel it makes the driver ability to control the car very tiring and difficult, especially when steering the vehicle at very low speeds like parking and reversing. There are improvements such as an increase in the mechanical efficiency of the steering system or lowering steering box ratios to help reduce the driver fatigue, however if the steering mechanism is not limited the increased number of turns made by the steering wheel to move it from lock to lock becomes disturbing. When the steering effort exceeds a safe maximum, a method must be found and power-assisted steering (PAS) seems to answer certain requirements: 1. It must be fail-safe, if the power system fails, the driver must still be able to retain effective control. 2. The degree of assistance must be proportional to the effort applied by the driver, and the driver must be able to continue to have the feel of the wheels. On light vehicles, hydraulic and electronic power the assistance is used to help the driver steer the vehicle. Hydraulically operated power-assisted systems run by a constant pressure or constant flow layout. The diagram below, shows the essential components required to operate a constant flow system with rack-and-pinion steering system. In addition to the normal steering components, the system requires: A pump, and A control valve. Hilliers (2012) Diagram 1 showing the PAS System (Power-Assisted Steering) in a hydraulic system: Hilliers (2012) The hydraulic pump shown has the reservoir for the hydraulic fluid as the contained component of the design. The reservoir supplies the hydraulic fluid to the power-steering control valve that is joined to the pinion shaft. When it is driven on a straight ahead position the valve is placed in a neutral position, allowing the fluid to go around continuously through the hydraulic circuit. The fluid pressure acting on the power cylinder is equal so no assistance is given to the steered wheels. When the steered wheels are turned through the action of the driver giving movement to the pinion shaft and control valve, then the torsion bar connected to the control valve to the pinion shaft will twist. The torsional movement of the control valve will direct fluid pressure from the pump through to one side of the power cylinder. When the fluid pressure is acted upon on the power cylinder it creates a force to the side of the cylinder providing the necessary assistance to the driver in turning the steered wheel, the control valve normally sits in the neutral position, thus providing equal pressure to both sides of the power cylinder and requiring no longer the assistance is required. Hilliers (2012) The hydraulic pump is an eccentric rotor or also named a vane-type driven by the vee belt from the engine crankshaft. Some of the hydraulic pumps are put in place onto the new cars that are electronic to improve on the performing of the engine by not drawing power from the belt via the crankshaft. The pump is supplied by hydraulic fluid from either an integral reservoir or a remote arrangement. The type of fluid used is usually an automatic transmission fluid (ATF) which has low viscosity. The pressure is created in the pump by the rotation of the vane or rotor, the fluid under pressure is sent to the spool control valve. The maximum pressure that the pump can produce is normally around 7MNm squared or 1,0001bf in squared. This is controlled by a pressure relief valve. The normal pressure is generally proportional to the engine speed because of the direct linkage with the power-steering pump. Any excess pressure released by the pressure relief valve is redirected back to the fluid reservoir. Nowadays in most modern production vehicles a far on power steering system will also include features such as a system to alter the power assistance depending on the road and engine speed. This is done by fitting a valve in the system allowing full force during low speed manoeuvring increasing the assistance for the driver. During high road speeds and engine speeds the valve will modulate the pressure through the hydraulic steering system limiting the amount of assistance and enabling the driver to feel the road and the steered wheels. Vehicle handling is very much improved and so is the stability of the car. The control valve, shows a kind of rotary motion type control valve which is regulated by a torsion bar which is positioned between the steering shaft and the pinion of the steering box. The valve is commonly called a rotary control valve which is a shaft with a series of flutes encased by a sleeve which has the same number of internal axial grooves. The ports situated around the outside of the sleeve and shaft pass the oil from the pump supply to the lines connected to the ram chambers. The operation principles of the PAS system provide the following control functions: Road speed sensitive power assistance Assisted steering return Both functions are the result of the motor voltage control by the ECU. The ECU determines the voltage supply to the motor based on the following data: The force applied to the steering wheel by the driver The vehicle speed The steering angle position and The speed of steering angle change The torque sensor measures the input force applied by the drive, when the driver turns the steering wheel the torsion bar between the two halves of the steering column will twist. The amount of twist is proportional to the force applied. Diagram 2, The Rotary-type control valve operation Hillers (2012) Assessment Criteria 2.2 The active suspension system is now being commonly used for riding comfort, running safety, they control the vertical movement of the wheels relative to the chassis or vehicle body with an on-board system, rather than in a passive suspension in which the movement is being determined completely by the road surface. Active suspension may be generally divided into two main classes, pure active suspension and adaptive semi-active suspension. Active suspensions only vary the shock absorber firmness to match changing road conditions, the active suspension use some type of actuator to raise and lower the chassis independently at each wheel. The technologies allow the manufacturers nowadays to achieve a greater ride of quality and car handling by keeping the tyres perpendicular to the road in corners allowing for better traction control. The on-board computer detects body movement from the sensors throughout the vehicle and using this data controls the action of the active and semi-active suspension. Active suspension eliminates body roll and pitch variation in most driving situations including cornering, accelerating, and braking. The active suspension also known as computerized ride control have components like a computer or two ECU, adjustable shocks and springs, a series of sensors at each wheel and right through the car and an actuator or servo at each shock and spring. The components may vary slightly from manufacturer to manufacturer. The active suspension works by constantly sensing changes in the road surface and feeding that information, via the ECU to the outlying components. The components act upon the system to modify its character adjusting shock stiffness, spring rate and to improve ride performance drivability and responsiveness. Diagram 3, Active Suspension: Extremetech.com (2016) The principles of operation of an active suspension relies entirely on the computer (ECU) which detects body movement from the sensors located throughout the vehicle. The hydraulic pressure to the servo is supplied by a high pressure radial piston hydraulic pump. There are 13 sensors continually monitoring the body movement and vehicle level and supply the ABS controller with new data every ten milliseconds. Four level sensors one at each wheel measures the longitudinal and transverse body acceleration. At each hydraulic cylinder a pressure sensor monitors the hydraulic pressure. As the ABS controller receives and possesses data, it operates four hydraulic servos, each mounted in series on a spring strut, besides each wheel. Almost immediately the servo regulates the suspension which generates counter forces to body lean, dive and squat during several driving manoeuvres. There is a suspension strut which consists of a steel coil spring and a shock absorber connected in parallel. The Active Body Control system (ABC) also allows for self-levelling suspension which raises and lowers the vehicle in response to the ever-changing load. Every vehicle equipped with ABC has an ABC Sport button which allows the driver to adjust the suspension range for different driving style preferences. The feature allows the driver ton adjust the suspension to maintain a more level ride in a more demanding driving conditions. Motor-car.co.uk (2016) Assessment Criteria 2.3 The steering angle sensor (SAS) is a critical part of the ESC system that measures the steering wheel position angle and rate turn. A scan tool can be used to get the data in degrees. The SAS, which is located, in a sensor cluster in the steering column. The cluster always has more than one steering column. The ESC module must receive two signals to confirm the steering position. The signals are often out of phase with each other. The analog SASs are very much alike to the throttle position sensors, SASs are wired with a 5-volt reference, chassis ground and signal output and can be tested via a port under the steering column. When the steering wheel is turned, the SASs produces a signal that varies between 0 and 5 volts as the wheel is turned 360 degrees. It is possible to observe the 0 to 5-volt signal with meters connected to the SAS sensors. When the wheels are straight forward the sensors reads about 2.8v and 4v. If the readings are the same the two sensors could be shortened tog ether. Most vehicles produce a positive voltage turning right and a negative voltage turning left. A multi-meter could be used to test the voltage signal produced by the SAS sensors. Knowyourparts.com (2016) The self-levelling and ride control systems have fault diagnosis in most vehicles for they incorporate a self-diagnostic facility that will illuminate a malfunction indicator lamp (MIL) if a fault is detected. If you suspect a fault with a self-levelling or ride control system a visual inspection is normally conducted for wear and tear. A scan tool is connected to the diagnostic connector and fault codes are retrieved. Diagram 4, examples of suspension system fault codes: Stoakes Graham (2012) Antilock braking systems (ABS) are electronic systems that monitor and control wheel slip during vehicle braking. ABSs may improve vehicle control during braking and reduce stopping distances on slippery road surfaces by limiting wheel slip and minimizing lockup. Reducing wheel slip improves vehicle stability and control during braking, for stability increases as wheel slip decreases. A simple braking system consists of a master cylinder and four wheel cylinders. When the brake pedal is pressed the piston in the master cylinder forces the liquid out of the cylinder. The liquid pressed the two pistons in the wheel-cylinders outwards. The two pistons push the brake shoes outwards. One major component of the anti-lock braking system includes the master cylinder, when the pedal is pressed the primary piston moves to the left, when it crosses the bypass port the liquid is forced along the pipe lines to the wheel cylinders. When the pedal is released the primary piston is moved backwards. Diagram 5, Inside the Master Cylinder: Auto.howstuffwirks.com (2016) The principles of the ABS system are the following: The skidding and loss of control is caused by the locking of the wheels. The release and reapply of the brakes pedal will avoid the locking of the   Ã‚   wheels which in turn avoids the skidding. This is exactly what an antilock braking system does. The pressure modulation works when the brake pedal is pumped or pulsed, the pressure is quickly applied and released at the wheels. This is called pressure modulation, which works to prevent the wheels from locking. The ABS system can modulate the pressure to the brake as often as 15 times per second. ABS precisely controls the slip rate of the wheels to ensure maximum grip force from the tyres and therefore ensures easy manoeuvre and stability for the driver of the vehicle. The slip rate during ABS operation varies, the target slip rate can be from 10 to 30%. 0% slip means the wheel is rolling freely, while 100% means the wheel is fully locked. A slip rate of 25% means the velocity of a wheel is 25% less than that of a freely rolling wheel at the same vehicle speed. Diagram 6, showing a Lateral and Longitudinal Mu-Slip Curve: Freerebublic.com (2016) Hydraulic components of the ABS system include an accumulator, which is used to store the hydraulic fluid to maintain high pressure in the brake system. The antilock hydraulic control valve assembly controls the release and application of the brake system pressure to the wheel brake assemblies. The booster pump is used to provide pressurized hydraulic fluid to the ABS (Antilock braking system). The booster/master cylinder assembly is needed to modulate hydraulic pressure in the wheel circuit during the ABS operations. The fluid accumulator temporarily stores the brake fluid that is removed from the wheel brake unit during the ABS cycle. A hydraulic control unit may have one pump and one motor or it may have one motor and two pumps. The main valve is made up of a two-position valve and is opened only in the ABS mode. A modulator unit controls the flow of pressurized brake fluid to the individual wheel circuits. The solenoid valves located in the modulator unit and are electrically operated by signals from the control module. Diagram 7, typical Toyota ABS control relay wiring diagram: Wiringdiagrams21.com (2016) The electrical/electronic components consist of the following: ABS control module, which monitors the system operation and controls    the antilock function when needed. Brake pedal sensor, is the function to switch on the brake lights to alert    other vehicles that the car is slowing down and is going to stop. The wheel speed sensor, are generally used for sensing the wheel   Ã‚   speed. There are three different types of anti-lock braking system, firstly the four channel, four sensor ABS, this is the best scheme, there are speed sensors on all four wheels and a separate valve for all four wheels. Secondly, the three channel, three sensor ABS, this scheme is commonly found on pick-up trucks with four wheels ABS, has a speed sensor and a valve for each of the front wheels, with one valve and one sensor for both rear wheels. Thirdly, the one channel, one sensor ABS, has one valve which controls both rear wheels and one speed sensor located in the rear axle. The features and benefits of ABS system include the following: Features   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Benefits Control of steering.  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Increase steering ability and   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   vehicle stability during   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   braking Fail-safe electrical/ electronic  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   If the electrical/electronic    System.  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   system fails, the ABS is shut   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   off. Traction control.  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   It is an optional feature that   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   controls excessive wheel   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   spin during acceleration. ABS malfunction indicator lamp.  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   It informs the driver or   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   technician that there is ABS   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   fault. Diagram 8, the Operation under different conditions:   Slideshare.net (2016) The design goals of the ABS system are to: Attain minimum stopping distance Maintain stability and steering ease The design solution includes the following: To develop a system that rapidly modulates the braking force under hard braking conditions to: Maintain the ideal tyre slip percentage to maximise braking force (=15%), recalling that Fbrake = Ubn. To permit the vehicle to be steered with stability maintained by preventing skidding. The automatic traction control system applies to the brakes when a drive wheel attempts to spin and lose traction. The system works best when one drive wheel is working on a good traction surface and the other is not. The system also works well when the vehicle is accelerating on slippery road surfaces especially when climbing hills. Diagram 9, A block diagram of traction: Sine.ni.com (2016) The benefits of traction control are avoiding are: It improves driver safety Less sudden twists and turns Fewer slippage of the wheels Fewer stopping distances Mostly integrated with powerful cars Better gripping of the car. The traction TCS control system is used to prevent wheel spin and loss of traction. These sorts of systems help to prevent the tyres from breaking loose during sudden acceleration on slick surfaces. They are usually an add on to the ESC electronic stability control system to control and restore traction on the slippery roads. The TCS and ABS systems share the same wheel speed sensors. The TCM program requires two additional solenoids in the hydraulic modulator assembly. The solenoids isolate the brake circuits to the drive wheels from the non-drive wheels during wheel spin. An electric pump and an accumulator are used to apply the wheel brake on the wheel that has lost its traction. The systems use an actuator to reduce power at speeds above 30 mph. This is done by closing the throttle on the vehicle with electronic throttle controls retarding the timing and decreasing fuel injector pulse width. If the ABS and traction control light illuminates continuously then the system should be scanned for codes. Most of these systems have a deactivation switch if the traction control is not required. Freeasestudyguides.com (2016) Assessment Criteria 2.3 The service and repair procedures from Land Rover Service Manual: 1. Clean the ABS sensor, smear the sensor with an anti-seize grease and   Ã‚  Ã‚   fit the sensor to the hub. 2. Fit the Allen screw securing ABS sensor and tighten to 8 Nm (6 1b.ft)   Ã‚  Ã‚   tighten to 8 Nm (6 1b.ft). 3. Secure the sensor lead to the suspension arm and suspension turret,   Ã‚  Ã‚   then connect and secure to the multi-plug. Close the cover on the   Ã‚  Ã‚   multi-plug housing. 4. Locate the wheel arch liner and secure with screws. Service and Repair: 1. Release catch and disconnect the ABS modulator multi-plug. 2. Disconnect the multi-plug from the sensor. 3. Position the cloth under modulator to absorb the fluid spillage. CAUTION: Brake fluid will damage paint finished surfaces. If spilled, immediately remove fluid and clean area with water. Ensure that the water does not enter modulator ports. 4. Noting their fitted positions, disconnect 6 brake pipe unions from the   Ã‚  Ã‚   Modulator. 5. Remove belt securing ABS modulator to mounting brake. 6. Release and remove the ABS modulator from mounting brackets to   Ã‚  Ã‚   Modulator and remove bracket. Assessment Criteria 2.4 The stability control system momentarily applies the brakes at any one wheel to correct over steer or under steer. The control unit receives signals from the typical sensors plus a yaw, lateral acceleration (G-force) and steering angle sensor. The vehicle stability control system (VSC) were created to help reduce the amount of wheel slip during acceleration and in harsh driving conditions. The way stability control system works is by having a connection between the live sensors and the anti-lock brake unit. It works by the sensors getting information and processing it through the ECU and sending it to the anti-lock brake system ABS unit. By applying hydraulic pressure through the anti-lock brake-system it may alter the traction of the wheels individually. The advantages of an integrated stability control system are: It allows the driver to maintain directional stability and control over   Ã‚   steering during braking. It is safe and effective. This automatically changes the brake fluid pressure at each wheel to   Ã‚   maintain optimum brake performance. The ABS absorbs the unwanted turbulence shock waves and modulates   Ã‚   the pulses thus permitting the wheel to continue turning under maximum   Ã‚   braking pressure. The disadvantages are: It is very costly The service and repair diagnosis is not simple Maintenance cost of a car equipped with ABS is more. Conclusion Statistics show that approximately 40% of automobile accidents are due to skidding. The problems commonly occur on vehicle with conventional brake systems which can be avoided by adding devices called ABS. If there is an ABS failure, the system will revert to normal brake operation. Normally, the ABS warning light will turn on and let the driver know there is a fault. Reference Extremetech.com (2016) Boses amazing active suspension uses speaker technology [online] Available at: http://www.extremetech.com/extreme/97177-bose-active-supension-moves-toward-market/2 [Accessed: 15th March 2016] Freeasestudyguides.com (2016) TCS Traction Control System [online] Available at: http://www.freeasestudyguides.com/tcs-traction-control-systems.html [Accessed: 15th March 2016] Hilliers (2012) Fundamentals of Motor Vehicle Technology, 6th ed. Cheltenham: London Motor-car.co.uk (2016) Mercedes-Benz Car Active Body Control (ABC) [online] Available at: http://www.motor-car.co.uk/susoension-types/item/14575-car-active-body-control [Accessed: 15th March 2016] Stoakes, Graham (2012) Principles of Light Vehicle Technology, 1st ed. Heinemann: Essex

Friday, October 25, 2019

Ben Franklin :: essays research papers

Throughout history icons emerge in each era that define that time, men who define the thinking, technology, culture, religion, and every other aspect of that time period. From the time of ancient Greece which possessed such prodigies as Socrates, and Aristotle men who were not only brilliant philosophers but also historians, mathematicians, and astronomers. To the Revolutionary period of America, which held such courageous enlightened men such as Thomas Jefferson, Thomas Paine, and Benjamin Franklin. Men who greatly helped shape America’s independence. A man who stands out among these names is â€Å" The First American†, Benjamin Franklin who goes beyond being simply an icon of America’s conquest for freedom, but is truly an American hero. Benjamin Franklin’s heroism exists in his numerous achievements in politics, his scientific inventions, and his accomplishment of truly being â€Å"The First American†. Franklin’s contributions to the world of inventions, and science prove his ideal heroism. Some of Franklin’s contributions include his improvements on Franklin’s stove, he invented the Pennsylvania fireplace, which retained and dispersed heat evenly in a room. Franklin shaped perhaps the first idea of electricity; he also helped improved city’s pavements, street lighting, sanitations, fire companies, and police. These are a small amount of Franklin’s more material accomplishments, but they are also some of his strongest. Franklin is considered an American hero because although he was a politician, he felt the need to go above and beyond his regular duties. Franklin strived for perfection and had a strong to desire to help his fellow man. Whether it was improving the quality of his community by looking at such common aspects like city pavement, or street lights, or by making a large technological breakthrough and creating something like the musical a rmonica. Although Ben Franklin’s heroism was never symbolized in any battle, it was largely seen with his constant attempts in the world of science and innovation. Benjamin Franklin used an expressed his high level of intelligence for others to learn and prosper from him. Although Franklin’s use and discoveries in science and innovation are well-rounded accomplishments, he is most credited for his actions in political office. Benjamin Franklin’s ethical right mind helped shape our nation today. Franklin believed that America had to separate itself from its control under Great Britain. Perhaps Franklin’s most heroic act is the work he contributed to help make America the free nation it is today.

Thursday, October 24, 2019

Lab 2: Microscopy and the Metric System

Microscopy and the Metric System Margaret E. Vorndam, M. S. Version 42-0090-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Exercise 1: Measuring Length, Weight, Volume, and Temperature Try the following conversions for practice. 40,000 ng =0. 24mg =0. 00024g50 cm =500 mm =0. 5m Procedure 1. Length: A metric ruler is useful for measuring items of length. The ruler below measures in mm, indicated by the small mm near 0. a. How many mm are there in 1 cm? 10, in a meter (m)? 1000 (Ruler is not to scale. See ruler in dissection kit. ) b. Locate a measurable object to use for this exercise. If the object is long, obt ain a yardstick that includes a cm scale; they can be found in local hardware stores. c. Record the length of the object below and do the conversions: Name of object: ID card . 5 cm=85mm=0. 085m Volume: Always pour an approximate volume of liquid into a clean beaker and then from the beaker into the volumetric flask or graduated cylinder. This will minimize contamination of the parent liquid source. Dispose properly of any leftover liquid. Do NOT pour it back into the original container. Why? This is so the original liquid does not get contaminated. When using a pipet or dropper to measure liquid, pour an aliquot into a clean beaker and then draw up the liquid from the beaker into the pipet. NEVER try to draw up chemicals by mouth.Why? Chemicals could go into your mouth, which is potentially dangerous and should never be done no matter if they deemed â€Å"safe† or not. Weight: Use the pen scale from the lab kit to measure out exactly three grams of sugar. Make sure to tare t he bag before adding the sugar. Why must the bag be tared before adding the sugar? This is done so the weight of the bag is not counted with the weight of the sugar. You must think about the weight of the bag when weighing out the three grams of sugar. How is the weight of the bag accounted for when the sugar is weighed?The bag is weighed first and then the 3 g of sugar is added on top of that weight so at the end the weight is more than 3g total due to the bag. Temperature: Practice converting the following with this conversion formula: 45 °F = 7. 2  °C 62 °F =16. 7  °C 98. 6 °F =37 °C Use a Celsius thermometer to measure the  °C temperature of several different aliquots of cold and warm tap water. Make sure to allow the thermometer to remain until the temperature is stable and no longer changes. Record the temperatures: Cold-15 °C Warm – 29 °C Hot- 48 °C Questions A. What laboratory equipment would be used to measure the following items? g flour| Beaker and scale| 36 mL water| Graduated cylinder| The length of a frog’s leg| ruler| 36 g water| Beaker/balance| 38? C| thermometer| Volume of a turtle*| Water displacement| 125? F| thermometer| Volume of blood| Graduated cylinder| Weight of a plant| Bag and scale| Weight of blood| Beaker and scale| Temperature of a fish’s body| thermometer| Temperature of blood| thermometer| *This answer may require some creativity. How could it be done? B. Provide the calculation steps, including the conversion factor that would be needed to convert the following measurements, and the final answers.Use U. S. and liquid units where appropriate. 248 g| = 248,000 mg| 145,000 ? L| = 145mL| 536 mL| = 536 cc| 0. 372 kg| = 372 g| 0. 75 L| = 750,000 ? L| 20. 39 cm| = . 2039 m| 145,000? L*(10^-6L /1? L)*(1000mL/1L)=145mL .372kg*(1000g/1kg)=372g 20. 39cm*(1m/100cm)=. 2039m 145,000? L*(10^-6L /1? L)*(1000mL/1L)=145mL .372kg*(1000g/1kg)=372g 20. 39cm*(1m/100cm)=. 2039m 248g*(1000mg/1g)=248,000mg 536mL *(1cc/1mL)=536cc 0. 75L*(1? L/10^-6L)=750000 ? L 248g*(1000mg/1g)=248,000mg 536mL*(1cc/1mL)=536cc 0. 75L*(1? L/10^-6L)=750000 ? L C.Provide the calculation steps, including the conversion factor that would be needed to convert the following measurements, and the final answers. Use US and liquid units where appropriate. 3 cups= . 711 L7,893 mg = . 0174 lb 2. 25 oz= 66. 53 cc36? C= 96. 8 ? F 7893mg*(1lb/453592mg)=0. 0174lb 36? C*(9/5)+32=96. 8? F (96? F-32)*(5/9)=35. 56? C 7893mg*(1lb/453592mg)=0. 0174lb 36? C*(9/5)+32=96. 8? F (96? F-32)*(5/9)=35. 56? C 3 cups*(. 237L/1cup)=. 711L 2. 25oz*(29. 57cc/1oz)=66. 53cc 145,000uL*(1tsp/4928. 92uL)= 29. 42tsp 3 cups*(. 237L/1cup)=. 711L 2. 25oz*(29. 57cc/1oz)=66. 53cc 145,000uL*(1tsp/4928. 92uL)= 29. 42tsp 45,000 uL = 29. 42 tsp96? F= 35. 56 ? C D. What advantages does the metric system have over the English method of measurement? What are the disadvantages? The metric system is advantageous because it has a base of ten, making measurements e asier to take, read, understand, and convert. The prefixes are also standard so they transfer between all measurements. Also, more countries use the metric system whereas basically only the US uses the English method. The main disadvantage of the metric system is that Americans have not grown up with these measurements so they are harder to picture and understand what distance, weight, etc. ach measurement is. For example, it is much easier for most Americans to understand the distance of a mile than to try and picture how long a kilometer is. E. Outline the steps necessary to accurately weigh 3. 5 g of starch. This depends on the scale used, but with the pen scale included in the labpaq, tare a bag or other container that can be used. Then add in the starch until the weight on the scale reads the weight of the container plus 3. 5 g. F. Outline the steps necessary to accurately pipet 5 mL of distilled water. Pour an aliquot of distilled water into a clean beaker.Put a little more th an 5mL of distilled water in a beaker. Pipet 5mL from the beaker, and check to see if the bottom of the meniscus lines up with the 5mL line. Exercise 2: Microscopy The compound light microscope effectively magnifies in the range of 40x to 2000x. If an object under view is 10 nm in length without any magnification, what will be its viewing size at 40x? 400nm at 2000x? 20 ? m What is the equivalent size at these magnifications, in inches? Show your calculations. 400nm*(1cm/10^7nm)*(1in/2. 54cm)= 1. 57*10^-5 in. 20? m*(1cm/10^4? m)*(1in/2. 54cm)= 7. 87*10^-4 in.The scanning electron microscope (SEM) employs electron bombardment to image very small specimens. Electron microscopes are used to image specimens that range from 1 nm to 100  µm in size. What is the equivalent in inches? . Show your calculations. 1nm*(1cm/10^7nm)*(1in/2. 54cm)= 3. 94*10^-8 in. 100 ? m*(1cm/10^4? m)*(1in/2. 54cm)= 0. 0039 in. Procedure 1. Parts of the Compound Light Microscope: Refer to a microscope as this s ection is read. Label the microscope diagram that follows as the examination of the microscope proceeds. a. Eyepiece (Ocular Lens): The magnification power is stamped on the outside of the lens.What is the power of the ocular lens? Microscopes may have interchangeable ocular lenses of different magnification. 15x b. Body Tube: Holds the ocular and objective lenses at the correct focal distance. c. Arm: Used to transport microscope and hold the body tube. d. Nosepiece: The revolving device that holds the objective lenses. May also be referred to as the turret. e. Objective Lenses: Consists of one or more lenses: i. The scanning power objective lens is the shortest of the lenses. What is its power? 4x ii. The low-power objective is slightly longer than the scanning objective. What is its power? 10x iii.The high-power objective is longer than the low-power objective. What is its power? 40x Label this microscope diagram with the appropriate part names and their functions: Eye piece- len s that you look through Body tube- Piece that leaves distance between lenses Course adjustment knob- adjusts focus Nosepiece- turns the lenses Objective lenses- magnify objects Stage- holds slides Mirror- reflects light so you can see what’s on the slides Base- bottom of microscope allowing stability Arm- Supports the tube and connects everything Eye piece- lens that you look through Body tube- Piece that leaves distance between lensesCourse adjustment knob- adjusts focus Nosepiece- turns the lenses Objective lenses- magnify objects Stage- holds slides Mirror- reflects light so you can see what’s on the slides Base- bottom of microscope allowing stability Arm- Supports the tube and connects everything a b c d e f g h i Parts not included in microscope are: Light source Source: Sharma, Abhishake. Labeled Microscope Drawing. N. d. Buzzle. com. 2. Focusing the Microscope: If the microscope includes an oil immersion lens, place a drop of immersion oil on the slide cover sl ip before rotating the lens into place.The function of the oil is to minimize light diffraction through the slide and subject so that greater detail can be seen. After using the oil immersion lens, clean excess oil off of the lens and the slide with a lens cloth. Never tilt a microscope when using oil or if viewing a wet slide. Why? The liquid could come off of the slide and get into a place in the microscope that isn’t good for it, and it will be messy also. 3. Operating the Microscope: a. Obtain a clean slide and cover slip from the slide box. Place the slide and cover slip separately on a paper towel or other soft surface to reduce the possibility of scratching them. . With scissors, cut a letter â€Å"e† from an old magazine or newspaper. c. Place the letter in the center of the slide. d. Follow the instructions in Section 6 below to make a wet mount of the letter. e. Following the directions outlined above under Handling and Focusing the Microscope, place the prep ared slide on the microscope stage. Leave the scanning lens in place and focus so that the letter is clearly viewable. Make drawings of the letter in the boxes below as instructed. Side of the slide furthest away from student| Look from the side of the microscope, viewand then draw the letter here, as it appears onthe slide on the stage. | e e Draw the letter here as it appears when viewing it through the microscope. | Side of the slide closest to student| f. What is observed? Microscopes invert the image on the slide. This means that the subject will appear to be 180 ° rotated and reversed from the actual image viewed on the slide. g. While viewing the letter through the lenses, move the slide slightly. What do you observe about the movement of the letter and slide when viewed through the lenses? When I move the slide up, what I’m viewing moves down. When I move the slide to the left, the image moves right. . Use the directions above to view the letter at the higher object ive powers. On the drawing made above, circle the portion of the letter that is viewable as successively higher power observations are made. What is your conclusion about what happens when higher power objectives are used? Only a piece of the top part is viewable. Higher power objectives magnify the image more. 4. Total Magnification Calculation: Typically, the ocular lens of a microscope will be 10x, but it may be higher or lower. The power is recorded on the side of the lens. a.What is the ocular lens power of the microscope that you are using? It may be 10x or 15x. Record it in Table 1. b. The objective lenses also have the magnification power recorded on their sides. What powers do the objective lenses on the microscope have? Record them in Table 1. c. Now, calculate the total magnification of the viewing area by multiplying the power of the ocular lens with that of the objective lens in use. For instance, if a microscope has a 10x magnification ocular lens and a 4x objective le ns in place for viewing, the total magnification will be 40x (10x multiplied by 4x).What other view magnifications are possible with the microscope? Calculate the total magnification for each set of lenses in Table 1. Table 1: Calculating Magnification Ocular Lens Magnification x| Objective LensesMagnification =| Total Magnification| 15x| 4x| 60x| | 10x| 150x| | 40x| 600x| 5. Diameter of Field: a. With the low-power objective in viewing position, place a short transparent metric ruler on the stage. b. While viewing the ruler through the lenses, measure the low-power diameter of field of view in mm. Convert this measurement to ? m and record in Table 2. c.Switch to the other higher power objectives, noting the diameter, in mm, for each in Table 2. Convert measurements to ? m. How might this information be useful when viewing microscopic subjects? Micrometers are smaller, so it is useful for very small objects when mm would be a very small number that wouldn’t be very understan dable. Table 2: Diameter of a Viewing Field | Magnification(ocular x objective lens’powers)| mm diameterof field of view| ? m diameter *of field of view| Scanning Lens| 60x| 2mm| 2000 ? m| Low Power Lens| 150x| 1mm| 1000 ? m| High Power Lens| 600x| Can’t tell,

Wednesday, October 23, 2019

Native Americans in the United States and Pocahontas Life Essay

This book was the bases and the most informative piece I have seen on a review of Pocahontas life in my perspective. Pocahontas life is a difficult piece of history to analysis for the fact that her life is only denoted by other persons of history writings. She has no known piece of writing of her own so all knowledge is personal based of outside parties. This makes it for sometimes difficult to truly believe everything for many of the views were from white men during a time period where they had not seen many females weren’t around. I believe the author thesis of the book for the Pocahontas part was her involvement with the English and her growth throughout her life. The other thesis of the book from the Powhatan side was there involvement with the English as well and there plan to use the culture but at the same time push them away. Within the first five chapter of Pocahontas and the Powhatan Dilemma it gives you a base review of history. This first part of the book it explains the culture of the Powhatan and how they are laid out. At this point in the book within the first chapter we find out that Pocahontas is only 9 years of age and her mother is nowhere to be found, but her father is Powhatan the chief of many native people and villages. It talks about the arrival of English in 1603 and we learn that many ships have come before us truly being to talk about John Smith and Jamestown. It also mention the arrival of Don Luis and the Spanish, but doesn’t get into much detail he just seems to pop up with the first few chapters her and there. We learn that Pocahontas name means â€Å"mischief† or the â€Å"little playful one. † The author tells us that the native were not completely different from the Europeans just simply behind the times. We also learn that within the native culture of the Powhatan that there chiefs do not come from the next up son, but from marriage of the daughters. We also learn that the Europeans felt that the women of the tribes need to be saved due to their work in the fields and other jobs around the village. It speaks of the native’s religion of their belief in spirits within everything. John Smith comes into play in 1606 when the English begin to prepare for the Virginia campaign. What I learn from John Smith was that he was a captain that has been captured a lot and has numerous stories of being saved by women that fall lustful in love with. As kids watching films and stories we are told of Pocahontas is her and John Smith fall in love, but at the time of them meeting Pocahontas would’ve been ten years of age. The plans of the English and John Smith was to: improve native culture, use the land properly, get there before the Spanish, and bring English enlighten, and a place to send the unemployed English. One of the main fears that I read about in the reading was the fear of the English to become like the Indians. The term we learned in class for this is recolonization. After the landing John Smith gets taken by the Powhatan and convince them not to kill him by way of trade. He promises them weapons which out of smarts gives them a cannon which cannot be moved. Both the native and the English realize the need of each. Without one another the English could not survive without food and the natives want weapons or easier put there technology. Over time many English were sent to live with natives to learn their culture and a native would be sent with the English. The most notable was Pocahontas herself was sent with the English to learn their language and lifestyle. The book talks of Pocahontas marriage first to a native warrior, but it fails to mention what happens to him. She later marries John Rolfe an English man who experience much of the reverse colonization. Before her marriage though Pocahontas was kidnapped one of the main characters they looked over her kidnapping was Sir Thomas Dale who was the first Marshall of Virginia. Pocahontas would declare herself a Christian in 1616 and then start her life with John. They would build a log on the land John was granted from the Virginia Company. They would have two children together in their lifetime. Shortly after being settled in there Pocahontas would go to London and experience true English culture. Pocahontas would become very ill around the time the Rolfe family was ready to head back to Virginia. Pocahontas died on March 21, 1617 in the Rolfe inn. What I learned from this book that for someone of her time period and of native culture Pocahontas got to see much more than any Native American of her time period for sure. I learned that much of what we were taught or told of her in are childhood was wrong. I learned that john smith stories could not be trusted. The feeling I receive as well is Pocahontas rejected her culture and tribe, but in return was probably rejected in a way due to her mother situation. Though she might have be royal in a way just from some of the information I read. The book was good though and I enjoyed the insist of Pocahontas life.

Tuesday, October 22, 2019

Government Intervention in the Economy essays

Government Intervention in the Economy essays In today ¡s society, many different nations will choose to answer the fundamental economic question: to what extent should the government intervene in the economy to protect the interests of society, in a variety of ways. One nation may support the system of public enterprise, placing their beliefs and values on the far left of the economic continuum; another nation may be in favour of private enterprise, placing their beliefs and values on the far right of the economic continuum. The third system is the idea of a mixed economy. A mixed economy is in the middle of the economic continuum, supporting private enterprise with some government intervention; it is a balance between public and private enterprise. The more successful way to run a country ¡s economy is to support the idea of private enterprise with some government intervention because it is more adaptable to changes in the economy and it is more stable. The two basic economic systems, public and private enterprise, are being practiced in some countries; however, the more successful and economically stable countries are those that have adapted mixed economy. Canada ¡s economic system is based on Keynes ¡s ideas about the role of government in the economy, known as mixed economy or welfare capitalism. Canada ¡s government encourages competition, profit-driven incentives, and private ownership of property, all of which are features of a private enterprise system. By doing so, producers are motivated to generate high quality goods and services, efficient and productive use of resources, and people are allowed to use their property for individual self-interests. If people are able to use these features to their advantages, then it is likely that they ¡ll be economically successful. This is a positive result because it means that the economy is growing and the total output of the economy is increasing. As for the less fortu nate, they are aided with social programs such a...

Monday, October 21, 2019

What is DSL †Digital Subscriber Loop

What is DSL – Digital Subscriber Loop Free Online Research Papers Nowadays, Internet technology is developing as fast as we need. Users of the Internet are still increasing and they are in need of a more powerful supporting technology to ensure a more steady connection and a higher rate of transmission. So, a kind of technology came, which is called â€Å"ADSL†. What does this word mean? The full name is: â€Å"Asymmetrical Digital Subscriber Loop†. As the name suggests, it is an improvement of the technology called DSL – â€Å"Digital Subscriber Loop†. The basic idea of ADSL, or say, the basic characteristic of ADSL technology is â€Å"Asymmetrical†. It provides users an asymmetrical upload download bandwidth. The upload bandwidth is limited in 640Kbps, while the download bandwidth is able to reach 8Mbps. This is the most important idea of ADSL, and this feature provides a satisfying connection status while users are trying to get video/sound track downloading service and information sharing when users do not need a high upload transmission rate. ADSL technology uses normal copper wire which is used by telephone transmission. The installation of ADSL is simple and costless. Users only need to set an ADSL multi-use xxxx on the original telephone wire – not a completely new one and there is of no need to change users’ phone number. Why does ADSL technology have such advantages? Some users may ask, based on the fact that it didn’t improve the technology of wire/cable production arts and it even uses the same wire with telephone! The answer to this question includes several points. Firstly, it is asymmetrical, as I mentioned above. This key technique is, simply explaining, doing the job: improve the distribution of resources – divide the total bandwidth according to our needs. And there is, of course, more myth inside this question. As we all know, currently we use the twisted pair wires to transmit telephone sound signal. But, what is worth our attention is that, we are only using the low frequency part of the wire which limits the frequency between 0 and 4 kHz. How can this narrow bandwidth satisfy our demands? Actually, we are just using the wire, not the bandwidth in this very wire. ADSL makes use of a higher frequency band which is defined between 26 kHz~2 MHz. What is the theory of this kind of â€Å"double frequency band signal† transmission? Well, this is not a mystery and even a very simple fact. The signal is coded by the ADSL modem and transmitted through the telephone wire, at beginning. Then, when it reaches the telephone department, a signal decoder start to work and separate the high frequency part and low frequency part, or say, the digital signal part and the voice signal part. Finally, when these have been done, the decode sends th em to corresponding service devices: digital signal part heads towards the Internet and voice signal part heads directly to the PSTN net. Simple enough, although how the decoder and encoder work is beyond my understanding and was left to the future studying. This method of using the same transmission path but in different frequency to transmit a series of signals is called â€Å"FDM† Frequency Division Multiplexing. Copper is being replaced nowadays because its high distortion. Hope that optical fiber technology will be ready in the near future. (P.S The upload rate of transmission is affected by the distance, size of wire used and noises, and is between 10 kbps ~ 60 kbps) I have found some information about the standards of ADSL technology, fortunately. (Should be useful to anyone who wants to learn the history or basics of ADSL) Since ADSL tech was born, there exist two standards: CAP and DMT. CAP was designed by ATT Paradyne and DMT was developed by Amati Communication Company. Recently, a new standard called G-lite was accepted by users. DMT and G-lite are professional in their own fields, though G-lite attracts more attention these days. CAP – Carrier-less Amplitude/Phase Modulation CAP is the special modulation method used only by ATT Paradyne. Signal is modulated into single channel and send through a telephone wire. Signal should be encoded before transmission and will be reformed at the receiver terminal. DMT?Discrete Multi-Tone? First the system divide the signal pack into several parts and tests the transmission qualities of every channel. Then, the system provides a certain signal bandwidth to a channel according to its quality. This means: systems always try to find the best way to transmit signals. G-lite G-lite is a new standard, so far as I know. This standard is developed by Universal ADSL Working Group. (Further details are left for future studying) The above is some basic understandings of ADSL technology. Now, we shall move to its characteristics of ADSL and I will try to explain the cause of these characteristics. (You can consider the following part as the advantages of ADSL technology) Second part: The advantages of ADSL corresponding technology See, a new technology’s birth means there are some advantages comes with it (though it is not a totally new improvement). Modem and ISDN technology have brought us a more and more satisfying connection to the Internet. ADSL shows its superiority, too. Generally speaking, ADSL connection technology has following advantages: A steady connection to the Internet and magically, a super high-rate transmission! This depends mainly on its design ideas, as we have covered earlier. Asymmetrical upload and download rate of transmission perfectly uses the bandwidth recourses users have when we connect into the Internet. ADSL provides a much higher rate of signal transmission than traditional modem (28.8k) – about 200 times higher! At the same time, it outnumbered the ISDN technology (about 128K), a lot. Compared with the cable modem technology, ADSL is more â€Å"flexible†, although it has a lower download rate. ADSL needs a very small investment. It uses the original telephone wire, not some advanced tech. This greatly reduced the cost of installing an ADSL modem. And it will not affect the quality of users’ phone talks, need no change in phone number. ADSL reduce the cost through the multiple use of one wire. Users of ADSL need not to pay additional fees for using a telephone wire when they are connected to the Internet. Finally, ADSL has a low installation difficulty. Users can install any ADSL modem instruments on their own. There is no need to invite a professional engineer to handle these. 3rd part: Applications of ADSL tech Before we look at the possible applications of ADSL, I want to talk something about the theory of ADSL tech, in detail. ADSL use a special device to connect the twisted pair wire’s terminal. It has a high-speed downstream, a duplex and a low frequency POTS (4 kHz). The POTS channel ensures that the voice transmission works even the ADSL connection attempts failed. At the same time, the high-speed and medium-speed channel both are able to be multi-used to create several low-speed channels. Normally, the high-speed channel has an average transmission rate of 6 MHz and the medium-speed duplex has an average transmission rate of 64 kHz. ADSL has a powerful error-correcting system due to its multi-used downstream and duplex. It has been tested that ADSL is able to handle MPEG2 and several other digital video formation. So, what can we do with this technology? I searched the net, and made some conclusions: High-rate connection. Since ADSL technology has brought us such a convenient connection method, What are we waiting for? We can use ADSL to surf in the Internet. BBS, websites are now more convenient to be browsed. We are able to use ADSL to get a much higher e-mail transmitting rate. An encouraging fact is that ADSL makes online-chat possible! Playing videos and users have full control of the application program. Thanks to the asymmetrical upload and download transmission rate, ADSL technology is able to be perfectly used in video playing, downloading sound tracks or playing online games. ADSL satisfies the need of having both a high rate of signal transmission and a steady connection to the signal source. Creating strong and reliable connections between terminals. The ADSL wide-band connection technology provides possibility that companies combine their branch companies with the mother company network. This is also benefit from the stability of ADSL tech. This solution solves the problem caused by the distance between companies and will not affect the transmission rate of every user in the net when they are surfing in the Internet. In-house work support. In modern society, people tend to have a better working environment. So, many choose to work at home. If the available permits, of cause. ADSL can make this a real thing. Users can have a high-rate access to the data base of the company when they are sitting at home. Moreover, workers can enjoy the service of a high qualified online video meeting. This is what traditional modem can not provide. Long-distance medication and long-distance teaching, etc. Like in-house working, people tend to enjoy various services at home. ADSL also provide the possibility that teaching and medical treatment materials are available at home through the connection to the Internet. Generally speaking, thanks to the satisfying bandwidth of ADSL connection, users can get whatever data they need, never needing to consider the problem caused by a low bandwidth. At the same time, users do not need to worry about the fees of waiting in the net endlessly. 4th part: ADSL: compared with Cable modem technology There are always competitors. As ADSL is developing fast, several other technologies also tend to give a solution to the steady connection and provide a high rate transmission. Here, let us compare ADSL with the technology Cable Modem. Cable modem system uses the TV to get access to the Internet (HFC (Hybrid Fiber Coax)), while ADSL makes use of the telephone wire. Cable modem provides an upload channel between 5 ~ 45 MHz and a download channel between 550 ~ 750 MHz. First, we shall compare the bandwidth. This is an important factor of a connection technology. Generally speaking, cable modem technology has an advantage in bandwidth. Every sub-channel of cable modem can reach a total data transmission rate of 25 ~ 40 Mbps. So, when used by a small amount of users, cable modem performs perfectly. But, (users) sharing the same bandwidth makes the transmission rate unreliable, in some degree. On the contrary, ADSL provides a stable transmission rate. Second, we can look at the ability to resist distortion. Cable modem uses coaxial wire while ADSL is still using the traditional telephone wire. This gives the cable modem technology unmatchable superiority of resisting distortion. Finally, we can see that ADSL instrument is easier to install than cable modem. Nowadays, people are still trying to make full use of narrow bandwidth wire to achieve high transmission rate and our final goal is successfully using the light to carry signals. Optical fiber is still being developed. Both ADSL and cable modem technology are useful technology and connection device before the final goal is achieved. Final discussion As we can see from above, ADSL technology is a creative idea of how to make full use of original telephone wire. â€Å"Low cost, easy to install, stable transmission rate† are its most significant advantages. More and more users especially families are trying this technology. In the words above, I just covered some basic theory and applications of ADSL technology. We, should learn something from its interesting and creative ideas. Reference: Thanks to chinaitlab.com/www/special/adsl.asp . This website gave me a lot of useful information I needed. During the creation time of this essay, I have read lots of its articles and learned a lot. [1] [2] http://windows.chinaitlab.com/skill/13530.html I have used a figure of this address Lots of information comes from â€Å"http://windows.chinaitlab.com/skill/13530.html†s tutorial. Research Papers on What is DSL - Digital Subscriber LoopThe Project Managment Office SystemInfluences of Socio-Economic Status of Married MalesBionic Assembly System: A New Concept of SelfIncorporating Risk and Uncertainty Factor in CapitalOpen Architechture a white paperStandardized TestingThree Concepts of PsychodynamicGenetic EngineeringDefinition of Export QuotasThe Relationship Between Delinquency and Drug Use

Saturday, October 19, 2019

Causes of Conflict

Scarce resources are very important to the country. It is a source of revenue for the country and it can be sold off for money and as raw resources for industrialization. Thus, countries would want to compete for scarce resources. An example would be the Iceland-britian conflict. As Iceland depends on the fishing industry for survival, its source of revenue comes from the fish caught. In 1970s, the number of fish, especially cod, dropped by 1/3 and these were due to the over fishing of Belgium, german and britian on Iceland seas. Thus, Iceland has came up with measures in controlling the number of fish caught to the UN but most were ignored. As 79% of the total export comprises of fresh fish and fish products, it is important for Iceland to maintain a sustainable levels of fish stocks in the seas around Iceland. Source of economic survivals is threatened, Iceland had to fight to ensure that this source of natural resource is sustained. This conflict resulted in Iceland breaking displomatic ties with britian. When a country’s scarce resources is being threatened, they have to fight back as it is their main source of revenue and survival. Losing the main source of scarce resource ewould lead to economic downfall, jobs and livelihood at stake resulting in poverty Different values and benefits. Countries fight over different values and benefits due when they feel that it is being threatened by others. This is evident in the Korean war. Korea is being separated into 2 halves in the 38th parallel after the Japanese surrended in the 1945. The Russian occupied the north of parallel and the American occupied the south of parallel. Attempt of un to establish a single government failed as the north parallel did not want to have an election in the north. North korea was then created and became a communist party whereas south korea was then created and became democratic party. Both the government claimed that they both have the rights to rule the Korean peninsula. China, afraid that the north korea would be influenced by the south korea’s democractic system, helped and supported north korea in the war of north korea and south korea to spread communism. This showed that when countries come into conflict to extend their balue systems to other territories and also protect their value systems from being threatened to fight back

Friday, October 18, 2019

Quantitative business and management journal Essay

Quantitative business and management journal - Essay Example elaborates that the relation of transfer of knowledge and contribution with the motivational level in the different network structures. The involvement of the employees in the knowledge sharing makes them feel their importance in the firm and the decision making of the company and hence increase the motivational level of the employee. The motivational level of the employees is increase as with their involvement in the knowledge sharing along with that when the involvement is done from every employee the contribution is of wide variety and different aspect of knowledge is contributed which is beneficial for the company as a whole. The research of this paper is aimed as to determine the different network structures in which the contribution from different and variety of sources improves the quality of the research and information and how different collaborating sources improve the motivational level of the employees. The knowledge sharing within the organization is seemed to be benefic ial for the company as a whole or not by including the motivational level increase within the employees and the benefits of the contributions as a variety of angles and perspective. Theory The theory in this paper is that the motivational level either intrinsic or extrinsic leads to the connectedness of the employees. There are several factors that lead to intrinsic motivation and extrinsic motivation. The internal satisfactory factors that leads the sharing of knowledge of an individual leads to intrinsic motivation. The internal satisfaction may be of different intensity and thus they have the relative impact upon the sharing of knowledge of the individual. The extrinsic motivation comes along the external satisfactory conditions which are in terms of reward which may not necessarily be quantitative. The theory in this paper has been studied before as to the individual extent only where the motivational level relation with the connectedness of knowledge sharing of the individuals within the social circle. In this paper the research includes the involvement of the employees in the knowledge sharing of the company which shall be beneficial for the company as whole. The connectedness of the employees with the organization comes along with their involvement in the knowledge sharing of the employees as it enhances the motivational level of the employees. the employees’ extrinsic motivational and connectedness is dependent upon the rewards, hence as long as the employee is employee is rewarded then the contribution and the sharing of knowledge continues but as the reward is not awarded then the sharing of knowledge stops. In this paper the implication of the motivational level of the individual within the organization as the sharing of knowledge is dependent upon the network of the organization. Thus the implication of the motivational level and the connectedness within the organization is done. Quantitative Method and Analysis The connectedness of the empl oyee within the organization in terms of sharing of knowledge is related with the intrinsic motivation of the employee. Employees within the organization develop a social circle where the connectedness and sharing of knowledge is enhanced. As the theory elaborated the sharing of knowledge is done when the full innovative transfer of knowledge network is provided to the employee the motivation of the employee enhances. The hypothesis that the intrinsically motivated employees are well connected provided with the network of innovative transfer of knowledge is carried upon and tested with the practical implication within the organization. Hypothesis The hypothesis in this research is the relationship between the connectedness and intrinsic motivat

American Railroad or Baseball Americas sport Essay

American Railroad or Baseball Americas sport - Essay Example Goods could be shipped across long distances at a fraction of the cost and messages could be sent across country in a fraction of the time. The purpose of the present research is to discover how the advent of the railroad affected the daily lives of Americans, particularly in the American west. While the general impression has always been that the railroads did little more than destroy those who came to work on them, this investigation attempts to prove that for all the harm it caused, the railroad also created many new opportunities for minority groups seeking new beginnings in the modern world. By examining the words these individuals left behind and the effects that the railroad was having in a more general sense upon the landscape, economy and way of life of the average person, particularly within the less settled and less civilized lifestyles of the west, a better understanding can be obtained regarding the positive and negative aspects of the advent of the modern world upon the se open and wild places, uniting a country and expanding Americans’ worldview while changing the nature of possibilities once available in this rugged land. The railroad introduced significant changes to the previously wild and unknown western portions of the country. While there were already many individuals living out in the empty prairies, it remained a difficult and precarious lifestyle, frequently isolating individuals from families back east thanks to a slow and costly communications system and the difficulties and distances to be traveled. For this reason, change occurred relatively slowly within the western half of the nation except in those areas more easily accessible by boat. As the railroads were built, however, change was forced upon the land. Industries changed as the landscape was divided up into manageable parcels, economies shifted as efficiency replaced older traditional methods of business and

Corporate Sustainability Reporting Essay Example | Topics and Well Written Essays - 750 words

Corporate Sustainability Reporting - Essay Example Some of the issues that concern CSR are discussed below. CSR are generally prepared by independent agencies based on the guidelines laid down in 1997 by the Global reporting Initiative (GRI). The GRI has tried to develop objective criteria that can become the basis for universally accepted reporting standards as in the case of audited financial statements. In 2006, a second set of guidelines was issued known as the G3 Reporting Framework. As of now however, companies are free to observe the GRI guidelines, as per their convenience and at different levels of accordance. As of July 2006, "just over 20 % of organizations issuing CSR reports using GRI guidelines did so at the [maximum] assurance level". Observance of GRI guidelines thus, though desirable is not enforceable and the discretion of following them in 'letter and spirit' rests with various organizations. The absence of any audit by an independent body reduces the value of a CSR, just as an un-audited financial statement of a company is of no value. However, there are many aspects of a CSR pertaining to non-financial aspects that are either, "qualitative statements about risk management and performance [or] quantitative measures that are not reliable enough to audit". Hence this aspect of a CSR is more of an opinion expressed by the company as well as the auditors, appealing more to emotion and based on individual perceptions. It is to remove this anomaly that the new G3 Reporting Framework has been compiled. Challenges of Providing Auditor Assurance The challenge of providing credibility to any CSR rests on firstly, the criteria that the management uses to prepare the CSR and secondly, the standards the auditor uses to assess the CSR. Adding to the difficulty of assessing a CSR is the fact that these reports are based on facts and figures that may be outside the area of expertise of the auditor(s). For any report to have credibility, it must be based on facts and figures and appeal to common sense. Quantitative aspects such as accident rates or amount of carbon dioxide emitted can be commented upon objectively and without bias. However, there are many other performance measures which cannot be audited, "with a high enough level of assurance to provide an opinion". In such cases, an element of subjectivity or bias in favour of the company being reported upon is likely. This probably stems from the fact that it is in the auditor's interests to seek the continued patronage of the company. More and more companies are disclosing their social and environmental performance as part of their annual financial reports. CPAs will increasingly play an important role both in preparing as well as analyzing such reports. Interestingly enough, a survey of investors and analysts revealed that as many as 90 % of the people wanted companies to include aspects such as environmental sustainability and corporate governance as part of their annual reports. This only underscores the importance of having objective criteria for measuring performance in non-financial fields in order to arrive at a true and fair view of a company based on facts and

Thursday, October 17, 2019

Annotated Bibliography Essay Example | Topics and Well Written Essays - 250 words - 7

Annotated Bibliography - Essay Example It saves on pencil and paper, agrees Shane. The author makes a credible case because she does not just use facts, but the actual words of students interviewed. â€Å"With Smartphones, learning is a whole new experience,† she quotes a student. Smartphones are significant in the daily education of the American child. Author Sonia delves deep into the importance of Smartphones in health care. She observes that consumers are now increasingly using Smartphones to â€Å"collect vital information regarding health and storing it electronically†. They can use the gathered information to treat chronic diseases and prevent acute ones, without necessarily involving physicians. Jessop talks about the benefits of Smartphones in health, pointing out the fact that it provides them with tips on what to eat, monitor hypertension and diabetes and how they can work with some 90-health devices in the market. The Smartphone has all the health information pertaining to a patient stored in their personal health records (P.H.R). Although the project is growing slowly, observes the author, there will be positive developments in the future. The source is helpful because it shows that the American people can rely on Smartphones to know about diseases and their treatment; they can socialize and take control of

Insurance Industry Antitrust Exemption Essay Example | Topics and Well Written Essays - 1500 words

Insurance Industry Antitrust Exemption - Essay Example The United States Supreme Court has made clear that the scope of the general exemption is broad, while the scope of the antitrust exemption is more limited. According to this Act, the states are given the authority to regulate the "insurance business." The regulation of the insurance business will be without the interference of the federal regulation. Unless the federal law specifically provides any regulation, there will be no interference of the federal regulation. The act provides that the "business of insurance, and every person engaged therein, shall be subject to the laws of the several States which relate to the regulation or taxation of such business." The McCarran Ferguson Act was passed by the congress which was in response to the case at the Supreme Court. The case at the court was of United States v. South-Eastern Underwriters Ass'n, 322 U.S. 533, 64 S. Ct. 1162, 88 L. Ed. 1440 (1944). Prior to this case, the issuance of an insurance policy was not considered as a commercial transaction, which according to the federal regulation would fall under the COMMERCIAL CLAUSE. It was held by the court that an insurance company that conducted substantial business across state lines was engaged in interstate commerce and thus was subject to federal antitrust regulations. Within a span of one year from the Southeas... Within a span of one year from the Southeastern Underwriters, the McCarran Ferguson Act was enacted by the Congress. The Congress also stated that, no longer would the insurance industry would be regulated by them within their boundaries. The McCarran-Ferguson Act provides that state law shall govern the regulation of insurance and that no act of Congress shall invalidate any state law unless the federal law specifically relates to insurance. The act thus mandates that a federal law that does not specifically regulate the business of insurance will not PREEMPT a state law enacted for that purpose. A state law has the purpose of regulating the insurance industry if it has the "end, intention or aim of adjusting, managing, or controlling the business of insurance" Limited Antitrust Exemption under the McCarran Ferguson Act The limited antitrust exemption under McCarran-Ferguson allows insurers to pool historic loss information so that they are better able to project future losses and charge an actuarially based price for their products. It also allows for joint development of policy forms. The act does not exempt insurers from state antitrust laws, which explicitly prohibit insurers (and all businesses), from conspiring to fix prices or otherwise restrict competition. The McCarran-Ferguson Act in no way results in any kind of restraint on competition. Under the act, insurers remain subject to rate and form regulation in every state. The home-owners policies cover all sorts of perils and hence are believed to be a federal regulator. The act's exemption applies only if three conditions are met: 1. The insurer's action pertains to the business of insurance. 2. The action must be regulated by state law. 3. The action must not be designed to boycott, coerce or

Wednesday, October 16, 2019

Corporate Sustainability Reporting Essay Example | Topics and Well Written Essays - 750 words

Corporate Sustainability Reporting - Essay Example Some of the issues that concern CSR are discussed below. CSR are generally prepared by independent agencies based on the guidelines laid down in 1997 by the Global reporting Initiative (GRI). The GRI has tried to develop objective criteria that can become the basis for universally accepted reporting standards as in the case of audited financial statements. In 2006, a second set of guidelines was issued known as the G3 Reporting Framework. As of now however, companies are free to observe the GRI guidelines, as per their convenience and at different levels of accordance. As of July 2006, "just over 20 % of organizations issuing CSR reports using GRI guidelines did so at the [maximum] assurance level". Observance of GRI guidelines thus, though desirable is not enforceable and the discretion of following them in 'letter and spirit' rests with various organizations. The absence of any audit by an independent body reduces the value of a CSR, just as an un-audited financial statement of a company is of no value. However, there are many aspects of a CSR pertaining to non-financial aspects that are either, "qualitative statements about risk management and performance [or] quantitative measures that are not reliable enough to audit". Hence this aspect of a CSR is more of an opinion expressed by the company as well as the auditors, appealing more to emotion and based on individual perceptions. It is to remove this anomaly that the new G3 Reporting Framework has been compiled. Challenges of Providing Auditor Assurance The challenge of providing credibility to any CSR rests on firstly, the criteria that the management uses to prepare the CSR and secondly, the standards the auditor uses to assess the CSR. Adding to the difficulty of assessing a CSR is the fact that these reports are based on facts and figures that may be outside the area of expertise of the auditor(s). For any report to have credibility, it must be based on facts and figures and appeal to common sense. Quantitative aspects such as accident rates or amount of carbon dioxide emitted can be commented upon objectively and without bias. However, there are many other performance measures which cannot be audited, "with a high enough level of assurance to provide an opinion". In such cases, an element of subjectivity or bias in favour of the company being reported upon is likely. This probably stems from the fact that it is in the auditor's interests to seek the continued patronage of the company. More and more companies are disclosing their social and environmental performance as part of their annual financial reports. CPAs will increasingly play an important role both in preparing as well as analyzing such reports. Interestingly enough, a survey of investors and analysts revealed that as many as 90 % of the people wanted companies to include aspects such as environmental sustainability and corporate governance as part of their annual reports. This only underscores the importance of having objective criteria for measuring performance in non-financial fields in order to arrive at a true and fair view of a company based on facts and

Insurance Industry Antitrust Exemption Essay Example | Topics and Well Written Essays - 1500 words

Insurance Industry Antitrust Exemption - Essay Example The United States Supreme Court has made clear that the scope of the general exemption is broad, while the scope of the antitrust exemption is more limited. According to this Act, the states are given the authority to regulate the "insurance business." The regulation of the insurance business will be without the interference of the federal regulation. Unless the federal law specifically provides any regulation, there will be no interference of the federal regulation. The act provides that the "business of insurance, and every person engaged therein, shall be subject to the laws of the several States which relate to the regulation or taxation of such business." The McCarran Ferguson Act was passed by the congress which was in response to the case at the Supreme Court. The case at the court was of United States v. South-Eastern Underwriters Ass'n, 322 U.S. 533, 64 S. Ct. 1162, 88 L. Ed. 1440 (1944). Prior to this case, the issuance of an insurance policy was not considered as a commercial transaction, which according to the federal regulation would fall under the COMMERCIAL CLAUSE. It was held by the court that an insurance company that conducted substantial business across state lines was engaged in interstate commerce and thus was subject to federal antitrust regulations. Within a span of one year from the Southeas... Within a span of one year from the Southeastern Underwriters, the McCarran Ferguson Act was enacted by the Congress. The Congress also stated that, no longer would the insurance industry would be regulated by them within their boundaries. The McCarran-Ferguson Act provides that state law shall govern the regulation of insurance and that no act of Congress shall invalidate any state law unless the federal law specifically relates to insurance. The act thus mandates that a federal law that does not specifically regulate the business of insurance will not PREEMPT a state law enacted for that purpose. A state law has the purpose of regulating the insurance industry if it has the "end, intention or aim of adjusting, managing, or controlling the business of insurance" Limited Antitrust Exemption under the McCarran Ferguson Act The limited antitrust exemption under McCarran-Ferguson allows insurers to pool historic loss information so that they are better able to project future losses and charge an actuarially based price for their products. It also allows for joint development of policy forms. The act does not exempt insurers from state antitrust laws, which explicitly prohibit insurers (and all businesses), from conspiring to fix prices or otherwise restrict competition. The McCarran-Ferguson Act in no way results in any kind of restraint on competition. Under the act, insurers remain subject to rate and form regulation in every state. The home-owners policies cover all sorts of perils and hence are believed to be a federal regulator. The act's exemption applies only if three conditions are met: 1. The insurer's action pertains to the business of insurance. 2. The action must be regulated by state law. 3. The action must not be designed to boycott, coerce or

Tuesday, October 15, 2019

Apple Mission Statement Essay Example for Free

Apple Mission Statement Essay Apple designs Macs, the best personal computers in the world, along with OS X, iLife, iWork and professional software. Apple leads the digital music revolution with its iPods and iTunes online store. Apple has reinvented the mobile phone with its revolutionary iPhone and App Store, and has recently introduced iPad 2 which is defining the future of mobile media and computing devices. When shoppers sleep outside of stores just to be one of the first to buy an iPhone, its obvious that Apple Inc. is a company that enjoys fanatical brand loyalty. However, this brand success is not a result of dumb luck or forces beyond Apples control; its part of a well-thought-out plan to deliver strong products and to create an Apple culture. Find out more about these and other strategies that Apple employs to achieve its tremendous customer loyalty. A Store Just for Apple: Apple has historically been troubled by big-box sales staffers who are ill-informed about its products, a problem that made it difficult for Apple to set its very different products apart from the rest of the computing crowd. By creating a store strictly devoted to Apple products, the company has not only eliminated this problem but has made an excellent customer-loyalty move. Apple stores are a friendly place where Mac and PC users alike are encouraged to play with and explore the technology that the company offers. This is a space where Macheads can not only get service but also hang out with others who enjoy Apple products just as much as they do. By creating this space, Apple encourages current and new customers to get excited about what it has to offer. Complete Solutions: Apples products complement and complete each other. Buy an iPod, and you can download music via iTunes. For the average user, most Mac programs are produced by Apple. This sort of control over the entire user process, from hardware to software, strengthens customer loyalty. Apple users generally dont have to stray to find products and solutions they want. Are You a Mac? : Lets face it, Apple is a hip brand. It pushes a strong identification with everything young, up-to-the-minute and smart. Consider Apples Im a Mac campaign. The Mac guy is smooth and confident, while PC appears uptight and old. Once youve become smooth, would you want to go back to uptight? Varied Products: Many consumers may not be ready to buy an Apple computer, but theyre willing to give gadgets like the iPod or iPhone a try. By selling products with lower entry costs, t creates an opportunity for new users to be introduced to Apple. If these users enjoy their gadgets, theyre more likely to consider buying an Apple computer in the future. Media Fodder: Media outlets, especially bloggers, love to write about Apple. Why? Because Apple makes it so easy. With leaked rumors about new developments, its very own expo and mysterious shutdowns of its online store, Apple gift wraps news stories that are just begging for speculation and hype. By perpetuating this cycle of media frenzy, Apple keeps its customers excited about buying new Apple products now and in the future. Education Sales: By selling its products to schools and universities, Apple turns classrooms into showrooms. If students go through school using Apple products, they become comfortable with the interface and familiar with the superior performance the brand offers. By creating this early exposure, Apple captures customers before they even know that they are customers. Products That Deliver: Apple carefully considers what consumers are looking for, so its products are a result of both extensive research and strong design. This meticulous planning is a large contributor to Apples high customer-satisfaction rates. Its plain and simple: Robust and easy-to-use products not only make your customers happy, but also make them want to buy more products from you in the future. Outsourcing Unpleasantness: With Apple products, the average consumers interaction with the company is likely to be low. Unless something goes wrong, you dont have any reason to speak with an Apple customer-service representative. Of course, the iPhone presented an opportunity that could have made Apple much more involved, similar to administering iTunes for the iPod. With a phone, interaction becomes multifaceted. You have to consider billing errors, quality of wireless service, contracts and a number of other factors that often lead to customer frustration. With the iPhone, Apple was wise to stick with building a good product and letting ATT handle the service. Consistency: All of Apples products have the same basic architecture. Because of this consistency, customers who already own Apple products have a good idea of what theyll be getting before they make a purchase. They know that it will be easy to adapt to new hardware, and this makes them more open to making a repeat purchase. New Innovations: Although the architecture of Apple products is consistent, its portfolio is not. The company offers consumers a number of different ways to enjoy its products. By giving customers an opportunity to employ Apple in their living rooms, pockets and offices, Apple makes it easy to stay loyal to a brand they already like. Attractiveness: From packaging to aesthetic design to user-interface experience, Apple makes its products accessible and attractive. Bright colors, a smiling icon and slick-looking hardware remind customers every time they use Apple products that what Apple offers is appealing.

Monday, October 14, 2019

Reggio Emilia and Montessor Pedagogy Approaches

Reggio Emilia and Montessor Pedagogy Approaches The purpose of this essay is to critically analyse two curriculum pedagogical approaches. The two approaches that will be discussed in this essay are Reggio Emilia and Montessori. There will be an in-depth analysis of the two philosophies and how they are different or similar to each other. It will also include the differing views on the image of a child, role of the teacher and the inclusion of parents and family. There will also be some discussion on the critics of both approaches and the relevance to Te Whariki. Reggio Emilia (RE) is a small city in the Emilia Romagna region of Northern Italy. After the Second World War the people of RE urgently needed to build their lives, not only materially, but also socially and morally. In this time there was a powerful force behind the development of early childhood services (Thornton and Brunton, 2005). The women wanted to build a preschool to provide a new form of education that the next generation would not tolerate inequality and injustice. There was a strong sense of hope for the future arising from the adversity of the past (Thornton, 2005, p4). The Reggio philosophy was developed and shaped by the social and cultural influences in the area. Loris Malaguzzi was the inspiration behind the educational experience in Reggio Emilia. Maria Montessori was born in the year 1870 in Central Italy. According to Standing (1957, p45) Montessori was a strong minded, vivacious and determined child, displaying the kind of independence so highly valued in Montessori schools to this day. Montessori graduated as a doctor in 1896 and was the first woman in Italy to do so. In her early clinical experience she became a supporter of social reform, mainly as it related to the well being of women and children. She argued that enhancing the quality of the environment in which children lived was a way of eliminating poverty, inequality, illness, and criminality. This argument became the foundations of Montessoris lifes work. In 1907 she opened a school for slum children. The school was called Childrens House. It was an environment in which in children from the slums were advancing rapidly in learning. She than decided to abandoned her medical/academic careers and devoted her life to promoting her educational method (Feez, 2010). Malaguzzi was a social constructivist and was influenced by some of the most renown progressive educators and psychologist such as Piaget, Vygotsky, Bruner, Rousseau, Pestalozzi, Montessori, Dewey (Edwards, 2003). Malaguzzi includes Vygotskys concept of Zone of Proximal as crucial to the foundations of children teacher relationships. There is also a value for the operation of thought and language together in building symbolic representation of thoughts, ideas and feelings (Berk, 2007) Malaguzzi believed that children were social from birth, full of intelligence and active explorers (Gandini, 1997). Montessori was influenced by the work of Rousseau, Pestalozzi, Itard and Seguin. Montessoris interest was more practical than theoretical, but her theoretical view was based on Rousseaus work. Like Rousseau she argues that children think and learn differently then adults. Montessori education gives children freedom to explore the environment through their senses but they are given little external guidance on what to pay attention to and how to think about discoveries (Feez, 2010). To find an approach that provided opportunities for freedom and at the same time helping children adapt to society, Montessori looked at the work of French doctor Itard and Seguin. It was Seguin method which Montessori used successfully to teach deficient children in the 1980s, and when she used the same approach in 1907 to educate street children she was amazed at what unfolded. The RE philosophy was influenced by Malaguzzi. Malaguzzi emphasises that the theory which provides the underpinnings for the Reggio approach requires ongoing communication and dialogue, teachers as co-researchers alongside children, and revisiting ideas, guides and practice. Children are seen as a community of learners. It recognises the importance of ways in which children learn and consider each child as gifted. Children with disabilities have the full participation into the structure and are spoken to as children with special rights (Gandini, 1997). In the Reggio approach there is no predetermined curriculum. Short term and long term projects are developed from childrens interest, first hand experiences and their working theories about the world (Rinaldi, 2006). Children are encouraged to grow in competence to represent and symbolise ideas, feelings through any of the hundred languages. The teacher follows the childs interest and do not provide instructions for reading and writing, however they promote emergent literacy as children manipulate and communicate ideas and feelings. As children progress through the infant-toddler centre, or preschool, they stay with the same teachers. This provides opportunities for a strong relationship between the staff, children and their families to be nurtured over the long period. The RE approach identifies the environment as a third teacher between children, parent and teachers. Malaguzzi describes the physical environment and the availability of resources as the product of complex interactions, many of which can be realised only when the environment is a fully participating element (Thornton, 2005, p43). Teachers in a Reggio centre provide amiable environments which encourages exploration, exchanges, and communication. Montessori believed that her pedagogy was based on logical, scienctific inquiry. According to Montessori, from birth to three is the time of the unconscious absorbent mind whereas age three to six is considered as time for the conscious absorbent mind. In both these times, the child seeks sensory input, regulation for movement, order and freedom to choose and explore deeply with interpretation in a carefully planned environment which encourages the child to choose well. In a Montessori classroom children are in mixed groups spanning from birth to three years and teachers move with the child through the three year cycle (Feez, 2010). The exercises of practical life skills are an important part of the curriculum. It is based on ways people in the culture relate to each other socially, as well as ways in which they complete everyday tasks. Language also relates to the exercises of practical life, as children use it in different ways to interact and communicate with others. In a Montessori view any resource that is unrelated to the educational purpose of material has a potential to distract and confuse the child (Feez, 2010). Children have limited freedom to what they can and can not do in a Montessori classroom, for example to be disruptive, aggressive and disorderly. The Montessori environment is planned ahead of time to ensure that children have as much freedom and independence as possible. The approach emphasises on real things in the environment which requires hands on interactions. A Montessori classroom allows opportunities for meaningful learning in self chosen activities, and purposeful activities which requires concentration (Feez, 2010). The Reggio view of the child is central to its philosophy. The child is referred to as a rich in potential, strong, powerful and competent. At the centre of the pedagogy is the child who is confident in building relationships; who holds his or her own values; who wants to be respected and valued for himself as well as holding a respect for others; who embodies a curiosity and open mindedness to all that is possible (Thornton, 2005). Children are encouraged to develop their own working theories of the world and to explore this in greater depth. Children ideas are respected so that children feel unafraid to make mistakes or reconstructing their ideas. Self confidence and self image is fostered through discussion which promotes creativity. The notion of the hundred languages was Malaguzzis interpretation of recognising the value of all forms of expression and communication in which children interpret the world and represent their ideas and theories. Montessori philosophy view children as intelligent, active, reality based self regulating and self righting. Montessori believed that in order for them to live a quality life, they need to be prepared as competent, responsible and adaptive citizens who are life long learners and problem solvers. Childrens free chosen activity is regarded as work. Through a Montessori lens childrens works is seen as orientation towards future achievements and play that involves purposeful effort and concentration. Montessoris view on punishments and rewards to make children pay attention were regarded as forced and unnatural. She saw it as a form of slavery from which children needed to be released (Feez, 2010). The teachers in both approaches share a common goal in childrearing. They both regard themselves as nurtures, partners and guides to children. They depend on the environment as a pedagogical tool which is carefully prepared and aesthetically pleasing. Partnership with parents is highly valued in both approaches. However their contrasting view on a childs learning has lead them act different roles in a classroom. Reggio teachers are seen a learner, enthusiastically seeking new knowledge alongside children. Children and teachers are seen as co-researches in everyday process rather than a specialised activity. They provide tools, materials, resources and provide help when needed. Each class has two teachers who work collaboratively as a team. The teachers plan in collaboration with the pedagogista and the aterlierista. The pedagogista helps maintain high quality standards whereas the aterlierista promotes expression through different forms of media and symbol systems (Vecchi, 2010). Malaguzzi suggest that once children are helped to perceive themselves as authors and interventions, and to find the pleasure of inquiry, there motivation and interest will expand (Edwards, Gandini, Forman, 1998) In a Montessori classroom teachers are considered as directors which refers to someone who guides and draws others together. The role of the director is to provide a prepared environment and connect children with it. Montessori also emphasised the role of an educator as an observer rather than teacher. The method of observation still remains an important component of Montessori teacher training till this day (Torrence and Chattin-Mc Nicholas, 2009). The aim of the teacher is to help and encourage children to be independent, gain confidence and disciple so that there are minimal reasons for teachers to intervene (Feez, 2010). Teachers give children lessons (also called presentations) to show children how to use materials or how to act in the environment. Children are free to choose activities after they have had a lesson on how to do the activity. They intervene as little as possible to allow children to make good choices. In both approaches parent/families play an important part in their childs learning and development and are seen as partners alongside teachers. They are included in all decisions concerning their child and their input is highly valued. Parents receive extensive description about their children daily life and progress. Portfolios and other forms of children work maybe displayed and sent home as key intervals and transitions (Edwards, 1998). Respecting relationships are considered one of the most essential components of the RE approach. The relationships established between parents, children and teachers are key elements in supports childrens learning and development. Relationships are built on reciprocal, requiring mutual trust and respect. The Reggio term the pedagogy of listening emphasises listening as openness and wiliness to value the point of others. The first preschools were founded by the parents as a symbolic of hope and desire of better futures for their children. Therefore parental participation has always been important part of the Reggio approach. At the time a child enters an infant-toddler centre/preschool, the parents are considered as active participants in the ongoing educational process. The programme is designed to make families feel at home and an important part of the structure. This gives educators the opportunity to get to know families and understand their unique perspective of their own child. The Montessori approach includes parent/families in learning that concerns their child. Strong relationships are established between teachers and parents to follow the childs progress in home and classroom. Regular dialogue and written feedback gives parents information about their childs experiences and learning. Teachers provide suggestion on how parents can continue to use the Montessori approach at home. Parents are welcome to borrow resources and books and have many opportunities to learn about the Montessori philosophy and practice. One criticism to the RE approach is regarding the role of teachers as co-researchers along side children. Malaguzzi called this open review method a circle of idea. The idea that children learn through interactions and exploration of ideas with educators is regarded as thinking critically about difficult questions rather than problem solving. Another criticism is placed on the importance of the environment in the Reggio approach. The environment is referred to as the third teacher. It is argued that if the Reggio focus is on children and interactions and the use of space further encourages and supports this interactions and that the curriculum is adaptable to the changing interest to the child, so too does the design and environment change. Therefore the environment is a ship of motion rather than an unchangeable landmark (Rinaldi, 2006). It is argued that Montessori education does not allow children the opportunity for learning to learn. In a Montessori view a child had learned when they correctly finished the activity. It is an end state reached when the task is mastered. According to Crain (2011) in the real world children need to learn how to learn, to quickly adapt to changing environments and to create new environments. The Montessori approach does not allow for critical thinking or exploration it is rather a method of perfection. Freedom for initiative and creativity is limited. Teachers have firm rules about how tasks are done, and a child finds a way to manipulate the material which they are happy with, the teacher would not consider this satisfactory. The teacher will then encourage the child to keep working on the same activity until is completed the way it should be. This hinders children imagination and creativity (Gardner, 1966). Finally, both approaches make significant links Te Whariki. The principles of Family and Community and Relationships shows relevance to both approaches as parent/family are considered partners in the learning of their children. The strand of well being and belonging is evident in both approaches, as teachers support each individual child learning and development. Well being (Goal 1) supports the Montessori practice of practical skills where the children learn self help and self care skills (Ministry of Education, 1996). The strand of Contribution supports RE practice to explore as groups or individuals. Each child has the opportunity to express their idea. Group projects encourage children to learn with and along side others. The strand of Communication relates more to Reggio Emilia, than it does to Montessori practice. Communication and dialogue is an important tool which teachers use to extend childrens learning. Teachers support and allow children to be creative and expressive. This goal of non verbal and verbal communication shows relevance to the Hundred Languages (Edwards, 1998). The strand of exploration is also more relevant to the Reggio Emilia approach than Montessori, as Montessori is more structured and tasks are demonstrated on how it should be done, therefore it does not really allow for exploration. Exploration is seen a vital concept in the Reggio approach as teacher recognise the important of spontaneous play and allow children to follow their interest in more depth. Teachers become co-researchers with children to develop working theories and make sense of the world (MOE, 1996) In conclusion, RE and Montessori are both child-centred approaches and have many similarities as well as differences. Both approaches were established to turn away from violence/war and to give children the opportunity to realise their full potential as creative, intelligent individuals. In both approaches children are viewed as active partners in their own development and learning. The environment serves as a pedagogical tool for teachers to provide an aesthetically pleasing environment which provides children with freedom and opportunities for exploration. The teacher plays an important part in both approaches; however their contrasting views on the nature of children and their learning lead them to act different roles. A Reggio Teacher regards themselves as co-researchers alongside children, whereas a Montessori teacher sees themselves as a director or observer. In both approaches parents are seen as equal partners in their child learning and development. Overall, the Reggio Emili a approach provides children with opportunities for open ended exploration, whereas the Montessori approach is more structured and aims to provide opportunities for children to chose freely and gain independence.