Quality Enhancement Policy Essay Example for Free

Quality Enhancement Policy Essay 1.1 Introduction and Background The Government of Pakistan established Higher Education Commission (HEC) in 2002 to facilitate growth of indigenous universities of Pakistan to become centers of quality of education and research and development. Though this process, HEC aims to play its role in building of knowledge-based economy in Pakistan. In order to achieve this goal, HEC has undertaken a systematic plan of implementation that is 5year Medium Term Development Framework (MTDF). The main aim of HEC was to focus on quality and relevance (HEC, 2010). The core strategic areas of MTDF are: 1- Faculty development 2- Improving enrollment 3- Quality in learning and research 4- Importance to national plan These plans are supported by well-integrated crosscutting themes for developing leadership, governance and management, enhancing quality assessment and accreditation, and physical and technological infrastructure development, (Batool, 2010). HEC introduces quality enhancement cell in universities for maintaining and improving the academic quality in the country by establishing that criteria are being met and educational activities are also in an agreement with the plans of the commission. According to international practices and development, HEC improves plans in order to more improve the standards. HEC intends to achieve excellence in the higher education and by taking major initiatives to develop the performance of universities and started up with the primary step of outlining the performance evaluation standards for the universities. For this, numbers of documents are defined, every document of these articulates a detailed element of the institutional quality. Therefor these documents are equally important for achieving the desired certifications to quality enhancement in higher education (Batool, 2010). Self-Assessment is an essential element in completing the HEC recognition. The recommendations for Self-Assessment are published as â€Å"The Manual for Self-Assessment† for the purpose of implementation at department / programed level in the universities. The complete practices of Internal Quality Assurance (IQA) are controlled by the QECs established under the umbrella of the Quality Assurance Agency (QAA) of HEC at the universities and consequently develop an integral part of the universities concerned. Furthermore the QECs also work in management with authorization bodies to make the process of program level accreditation. However, the institutional act of evaluation has many more measurements with greater complexity, (HEC, 2006).This thesis defines the Institutional performance evaluation standards and to make sure that quality establishment is certified by the HEC for the universities. The institutional act assessment comes under the Purview of the HEC whereas this process is dated by the results of IQA Exercise done by the universities through implementation of the â€Å"Self-Assessment Model†. The effects of Self-Assessment will agree to the process of Performance Evaluation Standards for the HEIs to be directed by the HEC in line with best performs of External Quality Assurance (Raouf,2010). The Higher Education Commission is working for continuous improvement of these standards and their effectiveness. The HEC through QAA will assess individual institutions periodically established on the performance evaluation standards defined here. These periodic reviews will be shown from side to side an arrangement of On-Site Assessment by Performance Assessment Teams under the direction of QAA. The quality standards observed by a university will be documented only as a result of successful performance assessment reviews through evaluation of institutional successes against pre-defined principles (HEC, 2011). To sustain academic quality and standards in higher education the institutions need to be professional, creative and innovative. The vision, mission and objectives are the essential values when applied in its principle, examined and measured are likely to be fruitful. The motivation of assigning all these movements and applying them under the authority of QEC is not only to emphasize on maintaining the best faculty, administrative staff and students but to be best in research, emerging interdisciplinary courses, academic performance, strategic and integrated academic planning (GCU, 2011) Quality in academic development means agreement of all the stakeholders where the challenge is to deliver education which is continuously improving and is at the same level with the international standards. In recent years it has become a requirement that institutions of higher education demonstrate the success of their academic programs in providing high quality education that impacts the concerned stakeholders. The Higher Education Commission develops methods for evaluating the quality of academic programs (Kanwal, 2007). Moreover with the establishment of Quality Assurance Agencies at Higher Education Commission, it was decided in the National Quality Assurance Committee (NQAC) meeting that Quality Enhancement Cells will be established at all universities to make stronger the internal quality assurance procedure with a special emphasis on the quality of higher education to fill the gap between the fundamental and the desired status of quality education, (HEC,2011). The matter of quality is being known as the major issue confronting the higher education sector in the Medium Term Development Framework (MTDF). Therefore, to enhance the quality of output and efficiency of the higher education learning systems, a mechanism for the establishment of QECs has been developed by the Quality Assurance Committee to improve the standards of quality of higher education in a systematic way with uniformity across the country. The Higher Education Commission (HEC) established Quality Enhancement Cells (QECs) at ten public sector universities in 2006-07 whereas in 2007-08 more twenty QECs were established in the remaining public sector universities for enhancement of their academic, teaching and learning standards. The QEC family is being extended to additional fifteen public sectors and fifteen private sector universities in 2009-10 and twenty four in public sector universities in 2010-11 (Zafar, 2006). At the moment, the HEC has given incentives to encourage research, appoint foreign faculty, funds for workshops and conferences, and granting scholarship to go overseas to present research or do postgraduate research. It shows the deep concern of HEC regarding QA. The quality of research is a special focus and HEC has developed a zero-tolerance policy for plagiarism, (kanwal, 2007) It has established a QA Cell that states the necessity to improve a culture of assessment is always together with the concept of quality. Both internal self-evaluation and external reviews are dynamic components of any well-developed quality assurance system. It is entirely critical to monitor and control growth of sub-standard institutions of higher learning. A comprehensive multi-level mechanism of accreditation is to be developed to make sure establishment of quality education. Qualification needs to occur at the department or program level, as well as the Institutional level. (HEC, 2011) 1.2FUNCTIONS OF THE QUALITY ENHANCEMENT CELLS 1. The Quality Enhancement Cell (QEC) is to be supervised by a Dean reporting directly to Vice Chancellor/Rector. 2. QEC is responsible for maintaining public confidence that the quality and standards of the reward of degrees are improved and secured. 3. QEC is responsible for the review of quality standards and the quality of teaching and learning in each subject area. 4. QEC is responsible for the assessment of academic affiliations with other institutions in terms of effective management of standards and quality of programs. 5. QEC is responsible for essential clear and explicit standards as points of reference to the evaluations to be carried out. It should also help the employees to know as to what they could expect from candidates. 6. QEC is responsible to improve qualifications framework by setting out the qualities and skills that can be expected from the holder of a qualification, i.e. Bachelors, Bachelor with Honors, Master’s, M. Phil., and Doctoral. 7. QEC is respon sible to improve program qualifications. These are standard set of information clarifying what knowledge, understanding, skills and other qualities a student will have developed on successfully completing a Degree. 8. QEC is responsible to improve quality assurance processes and methods of assessment to affirm that the quality of provision and the standard of awards are being maintained and to foster a program of study, subject and staff development, together with research and other academic activities. 9. QEC is responsible to make sure that the universitys quality assurance techniques are designed to fit in with the arrangements in place nationally for maintaining and improving the quality of Higher Education. 10. QEC is responsible to develop procedures for the following: a). New programs approval b). Annual monitoring and evaluation including program, faculty, and students monitoring perception. c). Departmental assessment e). Student comment f). Comments of Employer g). Quality assurance of Masters, M.Phil and Ph.D. degree Programs h). Review of Subjects i). Institutional assessment j). Program specifications k). Qualification framework Universities play a significant role in the overall development of a country, their significance lies not only in providing degrees, but also in producing quality human resources for various zones of the economy (GIKI, 2011).To succeed this goal, Quality Assurance Agency (QAA) has designed some guiding principle to evaluate the quality of education in Pakistan to the ever changing conditions and global needs (HEC, 2011). It is state that Higher Education’s unique and symbolic phase is Quality Enhancement in Pakistan by IMscience that Importance of Quality can be understood from the fact that rapid development in higher education requires Quality Assurance in order to put up with current levels of academic standards and improve modern learning processes (IMScience, 2011).

Ac Power Logger Using Mcp39009 Engineering Essay

Ac Power Logger Using Mcp39009 Engineering Essay In this project we are going to record power consumption using MCP3909 by using AVR 5A microcontroller. This MCP 3909 is an energy metering IC with SPI interface and active power pulse output. Where the MCP3909 used in two different phases that can be operated at a time like 1.Output through active pulse power and 2. Waveform obtained as output through SPI interface. For the output real pulse power, the device gives frequency output proportional to instantaneous power. For the waveform output, it gathers data from the current and voltage channel and both are 16 bit second order delta sigma ADC . Through out this project time I learnt to do coding in C programming to get pulse output that shows the consumption of power. This program is developed to use with microcontroller Easy AVR 5A type of AT Mega 16. This program is executed by using AVR Studio by running it through AVR Flash and the output pulse wave form is gathered at AT Mega 16 board and we can check using oscilloscope. Here to have connection between AVR board AT Mega 16 and CPU we use USB which acts like supply and we use USART to transfer data between each other. As in my project I have MCP3909 as separate board I should give correct connection between MCP 3909 and AT Mega 16 correct supply connections. As I am doing project in embedded microcontroller with C programming and output I get is pulse waveform so for better performance and other reasons I took Easy AVR AT Mega 16 development board with 8 KHz frequency. My project is AC power logger using MCP3909 where MCP 3909 is an energy metering IC with SPI interface and active power pulse output. Where the MCP3909 used in two different methods where they can be operated at a time like 1.Output pulse power and 2. Waveform we get as output through SPI interface. For the active real power pulse output, the device gives output frequency which is proportional to instantaneous power. For the waveform output, it gathers data from the current and voltage channel and both are 16 bit second order delta sigma ADC which over samples input signal at frequency equal to MCLK/4 and allows large range of input signals. For channel 0, the increase in the current at channel 0 is done through programmable gain amplifier increase.. As I get pulse count at output when we use oscilloscope to get exact count and good performance I use Easy AVR 5A AT Mega 16 microcontroller. This AT Mega 16 microcontroller allows assembly language and C language programming but I did coding for counting the power consumption using MCP3909 in C language. In this first I gave USB and USART connection between CPU and AT Mega 16 board, here I gave MCP3909 connection with AT Mega 16 and gave current and voltage channel input to MC3909 and I get pulse output this is with out SPI pin not in use but still they should be connected. But for SPI connection program I will give voltage and current with 50hz frequency and take output voltage and current values from the hyper terminal connection and calculate the output values. In this whole project time I began to understand the SPI and USART connection to write program in C language and also understood how the MCP3909 works . The energy meter is a device which is used for electrical measuring, it is used to record electrical energy consumed in specific period of time in terms units Every house, small factory, business establishments, shops, offices etc need at minimum one energy meter to register power consumption. The one who supplies electricity raises bills based on readings shown in energy meter. The one who produces electricity sale the electricity to the electricity boards and board will sale this to costumer. So the data generated by the energy meter is the base to raise bill by the power supplier. This energy meter products are available in single and three phases at different current ratings as per customer requirements. This energy meters are basically electrical and mechanical components. The design of energy meter depends upon which rating of voltage and current meter has to work. In this project the energy metering IC that we take is MCP3909 which is used for supporting IEC 62053 which is standard international meter. It gets the output frequency which is proportional to real power as input so as to access the ADC channel and output of multiplier data. The delta sigma which is 16bit ADC is used to allow large range of currents using the design. The exact or appropriate energy IC is available in the industry which is highly reliable and which has 24-lead SSOP output pin. In this functional as we can see it shows ch0 and ch1 channels where these are inputs and given from the current and voltage transformers .The gains g0 and g1 are also given as input and the dual functionality pin is connected for SPI connections and also for f0, f1,f2. The outputs we take from the active power DTF conversion as HFout and other outputs Fout0 and Fout1 are obtained from stepper motor output drive for active power. The above one is the general block diagram of MCP3909, but the diagram that I use here shows the diagram with the connections , this shows how the MCP 3909 is internally connected to oscillators ,jumpers and for the output using its 24pins. It shows that for the jumper j7 it connects internally to fout 0/1, hfout. For the jumper j2 it shows the connections to spi communications connected and the jumper j6 to ch0 and ch1 channels. The digital voltage acts as digital circurity in MCP3909 where it is the one where we get digital power supply. This pin requires appropriate by pass capacitors and should be maintained to 5V. In both the input channel levels this pin acts as HPF and where it controls the flow of signals. The logic 1 will activate both the filters for removing the DC offset from the system and this logic 0 will disable both the filters so due to this they allow DC voltage. This is analog circuit pin which is used to give analog power supply with in MCP 3909 an this pin requires exact bypass capacitor which gives ramp signal with rising and falling edges and it must be maintained at 5V. This pins are used for current measurements and where they initially take analog voltage as input and convert to current and this will have PGA for small input signal. The linear and the region where it characteristics of this channel are dependent on PGA gain. It relates to maximum voltage of 470Mv/G and the voltage range changes from 1 to 6 V with respect to Agnd. . This pins are used for voltage measurement and this pins initially take difference analog voltage input. The linear and specific behaviour of this voltage channel is maximum at 660mV with absolute voltage 1V Here for the internal 2.4V reference the output is the reference in/out and with temperature coefficient of 15ppm/c. Here by applying the voltage to this pin from the specified range we can use external reference and these reference in/out pin uses bypass capacitor to AGND even when using internal reference.. This is the analog ground where all the ADC,PGA,POR and band gap reference are connected to ground and this is analog circuit. To have noise signal to be cancelled this pin should be connected to same ground as Dgnd with star connection. This is the normal ground connection where SINC filters, multipliers, HPF, LPF, digital to frequency convertor and oscillator; this is used as internal circuit connection. To have accurate and noise to be cancelled this digital ground should be grounded same as analog ground with star connection. The output pins that are connected to MCP3909 are frequency outputs that give us real power and the signal that we get when connected to oscilloscope is pulse where this pulse period is directly proportional to power and Fc constant. This pins helps us to activate the electro mechanical counters and also two phase stepper motor. The high frequency output supplies instantaneous real power information and out put is periodic pulse and where it is directly proportional to measured l power and HFC constant obtained by F0,F1,F2 logic gates and the output that obtained is the fastest output frequency. These oscillators will provide sine waveform with clock source and these oscillators are mainly used to give clock signal for master in the device. The clock frequency is given as 3.57MHz and this clock frequency value should range from 1to 4 MHz with out any error. In this to convert the signal from digital domain which has wide dynamic range we use PGA to do this function which is common thing done in wireless communication. To load normally input signal from analog to digital we need to increase the amplitude so to do this we use PGA. High resolution sigma to delta ADCs all have Programmable Gain Amplifier at input to the sigma to delta modulator is given as shown below The PGA on the ADs chip offer eight input ranges to ADC with 2.5 voltage reference, the eight reference voltages are 2.56V,1.28V,640mv,160mv,40mv.if reference voltage is doubled to 5v then full scale input for each range is halved. So the actual signal range for any PGA settings are given as, VREF*1.024/2(7-RN) where RN value is 111 when ref voltage is 2.5v The main use of PGA is that the noise in terms of micro voltage decreases when the gain increased. In effect the input signal is gained up but the noise is not gained up, so there is an improvement in signal to noise ratio. The pins reference sampling rate is given at 524 khz and capacitor value is fixed so there is no variation in reference current and any gain error that has due to resistance on reference input is also fixed. If reference current changes on sigma to delta the gain error that occurs also varies and the benefit of using ADC will be lost. The PGA for the ADC offers benefits of high resolution and low noise at high gain , but without the disadvantages of requiring regular calibration every time the range is changed. A buffered input and new reference sampling scheme avoid many of the problems associated with previous multirange ADC. All the delta sigma ADCs , registers, filters, multipliers are controlled by reset of master clear and this pin is also used to change their serial interface and behaviour or functionality. The logic 0 controls the ADC and registers in reset condition. The only one that uses power during master clear is oscillator. The microcontroller manufactures produce other design products so that they are related to their own design and in this we require another output pin. This condition or situation is correct for small design products where they have eight pins are fewer than that. This microcontroller has two output pins, one input pin , RAM flash and ADC module .For programming the microcontroller mode you need MCLR and supply pins(VCC and GND). To run or make the coding active we need mainly power supply and MCLR,microcontroller must see the difference between normal and program mode. Here the MCLR takes 12V to enter program mode and it takes external reset or input pin to enter into normal mode. The microcontroller design uses one pin for analog input and has other three outputs and it also requires an additional output, so for this reason the circuit uses MCLR pin as output. To make MCLR pin to act as output the microcontroller uses weak pull-ups. Analog to Digital Conversion (ADC) is the process of sampling continuous analog signal and converting the signal into quantitized representation of signal in digital domain and all the ADC architectures will convert analog signal into digital representation. The conventional ADC process takes input signal x(t) into sequence of digital codes x(n) at sampling rate fs=1/t, where T represents sampling interval this sampling function is equivalent to modulating input signal by set of carrier signals with frequencies 0,fs,2fs †¦. The sample signal is expressed as summation of original signal component and frequency, here the frequency modulated by integer multiple of sampling frequency. The signal component at frequency in input signal cannot be properly sampled and such signals get folded in base band signal creating in this non-linear is referred to as aliasing . Anti-aliasing filters are therefore required to prevent aliasing. Many A/D converters have successive or continuous approximation register and flash converters operate at nyquist rate fn. These converters sample analog signal at sample frequency equal to twice maximum frequency of input signal. Sigma Delta AD converters do not digitize the incoming analog signal into digital sample of n-bit precision at nyquist rate, sigma delta ADC samples the analog signal by an sample ratio N resulting Fn One of the advantages of sigma-delta ADC over nyquist ADC is the relaxation of the requirements for the anti aliasing filter. The requirement of anti-aliasing filter for nyquist rate ADC require sharp pass band (fs) to stop band (fn) The sigma delta ADC contains simple analog circuits like voltage reference, comparator, integrator,summing circuit and switch and in this the digital circuit consists of digital signal processing which acts as filter. Now consider technique of oversampling in frequency domain when converting to dc signal it has quantization error up to  ½ LSB and this sampled data has quantization noise. If ADC is less than perfect or exact value its noise is greater than quantization noise so due to this its resolution will be small than n bits and its actual resolution is given by The sampling rate is chosen as Kfs then quantization noise is q/sqrt12 due to this noise will spread at bandwidth dc to Kfs/2 , So to reduce noise we use digital low pass filter at output with out disturbing the wanted signal. K is referred as sampling ratio and this sampling relaxes requirement on the analog antialiasing filter. Here the data rate is less than the sampling rate and to satisfy nyquist criteria and this is done by using low pass filter to reduce the bandwidth, this process can be done by giving Mth result to output with neglecting the remainder and this process is known as decimation by factor M. This M can have any value such that output data rate is greater than twice the bandwidth. If we use oversampling to improve resolution then the oversampling must be factor of 22N to get N bit resolution increase, the sigma delta converters does not require any large oversampling because it limits to pass band signal and shapes the quantization noise to fall outside the pass band as shown in figure. Here we have 1-bit comparator (ADC) when we use it integrator output, then sum the input voltage with output of 1-bit DAC which we get from ADC output.. The digital low pass filter and decimator at digital output are added to get sigma delta ADC and after this signal is given to modulator where it modifies quantization noise by making it to lie above pass band filter ,so due to this the ENOB is larger than the expected sampling ratio. The sigma delta ADC operation is like the input given as Vin which is dc and the integrator consistently move up and down at node A and here output of comparator is given to 1-bit DAC and summing point at node B. This negative feedback value will force the average dc voltage at node B to be equal to Vin. The output voltage from the DAC is controlled in the 1-bit data stream of the comparator output. After that when the input signal rises at Vref, the number of ones at the serial bit stream also increase and due to this there is decrease in zeroes and in the same way as the signal of Vref goes negative the serial bit stream at one decrease and at zero it increases. Here it shows that average value at voltage as input is in serial bit stream which comes from comparator and decimator and filter allow stream and give output. The data from the 1-bit ADC is not worth full when the given input value is single sample interval, so when we have more number of samples that are averaged will provide correct value. The sigma delta can not give detailed values in the time domain because of the single bit data output, so when the single input is near positive side it shows more ones than zero and in the same way when the input signal is near to negative it shows more number of zeroes than ones and if it is in midscale then it shows equal number of zeroes and ones. The below figure shows the output of integrator for two conditions where the first one is for input zero near the midscale so decode them pass output samples through low pass filter that averages every four samples this shows the bipolar zero. So from this we can say that if more number of samples are averaged more dynamic range is obtained. The sigma delta ADC can also be seen as synchronous voltage to frequency converter with the counter. If the number of ones in the output data stream is counted from the samples then the counter output will give digital value of output, this method applies only when have dc or for slow changing input signal. The 2N clock cycles are counted to achieve N-bit resolution and there by for getting effective sampling rate. Here noise shaping is explained in frequency domain by using sigma delta modulator. In this the integrator which is present in the modulator represents an analog low pass filter with transfer function H(f)=1/f and this transfer function shows that the amplitude not directly proportional to frequency. The one bit quantize gives quantization noise Q and it is given to output sum block. If we have input signal X and output signal Y the value that comes out of summing point is X-Y and after that it is multiplied by the transfer function and this is given as, From the equation if we see that if f=0 the output Y reaches X with no noise , and at high frequency the amplitude of the signal reaches zero and noise value reaches Q. So due to this the analog filter has signal effect on low pass and high pass effect on noise Q. This filter does noise shaping at given frequency in delta sigma model and higher order filter gives more attenuation in sigma delta modulators but some precautions should be taken. We get good quantization noise and best ENOB for given sample when we have more integrator and summing points in sigma delta modulator. This figure is giving the relationship between order of sigma delta modulator and oversampling amount to reach SNR. If oversampling is taken 60 then the second order capable of giving SNR of 80db and also gives ENOB value as 13 and in this we have filter to reduce noise and decimator to decide degree. This carries 13 bit outside but if you want to use additional bits, these added bits that carry signals has no useful value and buried in quantization noise unless the post filtering is used. The resolution can be increased from the 1-bit system by increasing the oversampling ratio or by higher order modulator. In the other method for the waveform output we give current and voltage as input which are 16bit and then given to second order sigma delta ADC where it oversamples input at frequency equal to MCLK/4 and with this it allows for wide range of input signals. The input current channel (channel 0) usable range is increased with the programmable gain amplifier and this is linked with block diagram of MCP3909 and gives in detail of its signal processing blocks. To cancel the system offset on both the channels we use to high pass filter and from output of filter we get voltage and current, so when calculating power we should not get any offset. As this signals are not having DC offset so the averaging technique is used to give active power output. The power signal at we get after filtering is active power output it is DC component and for averaging technique use sine and non-sine waveform after this the ADC takes real power to give output pulse where the frequency is directly proportional to real power. The frequency present at FOUT 0, FOUT1 outputs are used to drive counters and stepper motor which shows power consumed. Every pulse from F0, F1, F2 settings are used to give fixed amount of energy , the HFOUT has less integration and high frequency to represent power signal and due to less time it helps the user to get values fastly under steady condition. . For the current and voltage transducers the MCP3909 analog inputs are connected and each pin has specifications like it should pass from 5kV to 500V contact charge. The differential input is given for both the channels to reduce noise and absolute voltage should be kept at 1V related to AGND so this can do error measurement. The common mode signal is taken to respect both last condition and input voltage difference range and for good common mode ration to should be referred to ground. The current channel has PGA gain to measure small signal with out other signal. The maximum differential voltage we have at channel0 is 470mV/Gain. The maximum voltage fro channel1 is 660mV. For channel 0 gain selection is given as, This MCP3909 has internally POR to check supply voltage AVdd and this check when the systems power is on or off. This POR has built in hysteresis and timer to check potential ripple and noise on power supply. For this the threshold voltage is typically set to 4V. The MCP3909 is kept in reset state if the supply voltage falls less than threshold voltage and hysteresis value is 200mV to prevent glitches. Once the power is on the internal timer stop sending the pulse with MCLK=3.58MHz there by preventing potential metastability. For calculating the active power the MCP3909 use digital filter which is first order IIR filter where we can extract real power (DC component) from the power signal. Since the input power signal has harmonic content. We get ripples from the filter output at line of frequency when the filter is not ideal. To reduce the noise for line frequency at 50Hz we use cut off frequency as input clock (MCLK=3.58 MHz). The rejection of frequency component will be more than 20db. In this at the frequency converter the output of filter is stored and then it is helpful to compare threshold for Fout0/1 and HFout and each time threshold is crossed we get pulse. The Fout0/1 require more energy to get output pulse than HFout , like integration period and as this acts as filter the output ripple or noise is minimum. The threshold or transfer function of HFout and Fout0/1 are different to each other. The threshold energy or transfer function are different to each other , the Fout0/1 output frequencies are quite low in order to allow integration. In this synchronous serial transmission clock is shared between sender and receiver or the sender gives timing signal so that the receiver knows when to read next bit of data. In this serial transmission if we do not have data to send then fill character is sent instead of data so to keep transmission continually, these synchronous communication is efficient because in these we have only data transmission between sender and receiver.. for example the synchronous transmission is used between printer and fixed device where data is sent in one set of wire and clock is sent in different wire. This RS 232 is asynchronous serial communication method which is used for computers and others, it is called as asynchronous because there is no synchronizing clock present like which is in SPI where it is serial protocol, the serial protocol is such that it automatically synchronize itself. We can use RS 232 to easily create data link between boards and standard PC, you can makes data loggers that read analog value from ADC and give it to PC this is done by writing program that shows data with using graphs. In serial communication the byte is sent or transmitted one bit at time but in parallel communication the whole data like byte (8 bit) transmitted at a time. So for that we use parallel communication to send data in shorten distance like between graphic card and CPU and these parallel can have say many wires as possible , but serial communication uses one wire to transfer data so it is used for long distance. In series the logic level changes with the bit being transmitted (0 or 1) and to know which is start bit and end bit in byte we need to add synchronize line and note the value of data line when the clock line is high but this is the way the serial buses like SPI work . UART is not having clock because it is asynchronous but start bit and stop bit are used to synchronize the incoming data. When the word is in transmission start bit is added at start of each word and this tells the receiver that data is read to sent and forces the receiver clock to be synchronous with clock of transmitter. These two must not have same frequency drift but can have same clock. After the start bit is sent each bit in word are given least significant bit (LSB) and each bit from transmitter is sent with same time and receiver is in half way to check that bit is one or zero. The sender will not know when receiver looks at the bits but sender knows when the clock says to begin to send next bit of word. When the complete data word is sent the transmitter adds parity bit and at the receiver uses this parity bit for error checking and at last the one stop bit is sent by the transmitter, if the receiver does not receive the stop bit when it is supposed to be the UART thinks the entire word to be garbled and reports framing error to host when data word is read. This framing error occurs because the sender and receiver clocks are not running at same speed. Whether the data is sent or not the UART automatically discard start, stop and parity bit and if another word is coming the start bit for new word comes as soon as the stop bit for existing word been sent RS 232 In this it has two data line like RX and TX , where TX is the wire where data is sent out to other device and RX is the line in which other device put data it needs to send. We know that high = 5v and low =0v for MCU boards and this RS 232 has high=12v and low=-12v. So to make RS 232 to interface with MCU which understands 0 to 5 volts we use MAX232. As RS232 has no clock line for synchronization perfect timing is needed so transmissions are carried out in certain speed which is bits per second and number of bits transmitted per second is know as baud rate. Some standard rates are 1200, 2400, 4800, 9600, 19200, etc. RS 232 Level conversion As seen above the RS232 signals differ from signals in MCU, this level converter will convert RS 232 signals from -12 to 12 volts from PC to signal 0 to 5 volts to fed to MCU. It is good to check the operation so we use converter to see its working nature, so for this we need Hyper-terminal windows software which is used to open COM port and to send and receive textual data. For testing we need to connect output RX/TX together so data written to COM ports to enter our circuit and converted to MCU board signal level. After this understand the USART of AVR Microcontroller and write code to activate USART to send and receive data, like other microcontrollers AVR also has main hardware for serial communication this is called USART. In this USART hardware you need to write data to one of registers. Clock generation. This generator generates the base clock for transmitter and receiver, this USART supports four modes of clock operation 1. Normal Asynchronous, 2. Double speed asynchronous, 3. Master synchronous and 4.slave synchronous mode. The UMSEL bit in the UCSRC (control and status register) is the one that selects between synchronous and asynchronous operation. Double speed(asynchronous mode) is controlled by U2X found in UCSRA register. When UMSEL=1 the data direction register for the XCK controls weather the clock source is internal (master mode) or external (slave mode) and this is shown in block diagram Txclk- transmitter clock(internal signal) Rxclk receiver clock(internal signal) Xcki used for synchronous slave operation Xcko used for synchronous master operation Fcso- system clock Baud rate generator The USART Baud rate register and down counter are connected as programmable prescaler or baud rate generator. The down counter which is running at the system clock(fosc) is loaded with UBRR value each time the counter has counted down to zero and clock is generated each time counter reaches zero and the clock generated is the baud rate generator clock output = fosc/(UBRR+1). The transmitter divides the baud rate generator clock output by 2,8.16 depending on the mode and this baud rate generator is directly used by receiver clock and data recovery units. The baud rate generator equations are given as, Operating mode Calculating baud rate Calculating UBRRvalue Asynchronous normal mode Baud= fosc/(UBRR+1)16 UBRR= fosc/16baud   1 Asynchronous double speed mode Baud= fosc/(UBRR+1)8 UBRR= fosc/8baud   1 Synchronous master mode Baud= fosc/(UBRR+1)2 UBRR= fosc/2baud   1 External clock The synchronous mode operation is done by using external clock and external clock input from XCK is sampled by synchronous register to reduce change in stability and the output from synchronous register must pass through edge detector before it is used by transmitter and receiver. This process includes two CPU clock period delay and its frequency is given as FXCK USART of AVR The USART of AVR is connected to CPU by these six registers UDR- USART Data Register: basically this is not one but two register , when you read it data is stored in receiver buffer and when you write it gives to transmitter buffer. UCSRA: USART Control and Status Register: as it name says it stores some status about USART and there are some of this kind like UCSRB and UCSRC. UBRRH and UBRRL: This is USART baud rate register, it i s16 bit wide so UBRRH is high byte and UBRRL is low byte . To write programs with using USART you need to study about each register, the seen behind using USART is same with other internal peripheral. now we will describe each registers clearly This bit is set when USART completed receiving byte from host and program should read from UDR and this flag bit is set when unread data is present in receiver buffer and gets cleared when receiver buffer is empty. If the receiver is disabled, the receiver buffer is flushed and the RXC will completely zero. Bit 6- TXC: transmit complete This bit is set 1 when USART has completed transmitting byte to host and program can write new data to USART through UDR. The transmit flag bit is cleared automatically when TXC interrupt is executed. Bit 5 UDRE USART Data Register Empty The UDRE flag first tells us that the transmit buffer (UDR) is ready to

Human needs paper :: essays research papers

1.  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚ · The needs of public assistance helps single parents or families just starting out with low income; Theses help qualify them for public housing and assistance.  · They usually receive the basic things that any person with a full time job would receive such as, medical cards, health insurance, dental insurance, and eye care. 2. I really don’t pay taxes, so I really shouldn’t have any opinions about this issue, but I do. I don’t really mind the public assisted people especially the ones who are single parents and need the money because their isn’t any income or child support being brought in to feed children in the house. I don’t agree with the people who do nothing at all and just milk the system. I’d like to go kick my feet up on their T.V. and say â€Å"why don’t you make your self useful and get me a beer out of the fridge and while your up get me a cigarette, cause odds are, the working people of America are paying for it, anyways. 3.  · The pros and cons of family life involves the emotion, development and public assistance part of the authors views.  · Sometimes families, when poor steer to solidarity, willingness to share. This solidarity gives them a strong sense of priority for their families. This also helps the kids of these type of families to make better for their kids.  · There are joint parental responsibilities that are shared between the mother and father. Their responsibility is to, financially manage, companionship with children, discipline of children, and other family responsibilities. IN public assistance services, this type of way of family life doesn’t work. This is caused because of their amount of money, that they have coming in and it is hard for these type of people to agree on financial decisions, let alone take care of their children’s together.  · In these type of public assistance houses parents do not prepare their children for lives hardships, due to the fact that they only usually care about themselves.  · The house being ran by a woman has it’s pros and cons. A good thing is a women’s ambition and her efforts to make sure that her children have the best. I’m not trying to be stereotyping but most of them in public assistance housing, use their kids to benefit from the government funding and their kids usually see none of it. Human needs paper :: essays research papers 1.  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚ · The needs of public assistance helps single parents or families just starting out with low income; Theses help qualify them for public housing and assistance.  · They usually receive the basic things that any person with a full time job would receive such as, medical cards, health insurance, dental insurance, and eye care. 2. I really don’t pay taxes, so I really shouldn’t have any opinions about this issue, but I do. I don’t really mind the public assisted people especially the ones who are single parents and need the money because their isn’t any income or child support being brought in to feed children in the house. I don’t agree with the people who do nothing at all and just milk the system. I’d like to go kick my feet up on their T.V. and say â€Å"why don’t you make your self useful and get me a beer out of the fridge and while your up get me a cigarette, cause odds are, the working people of America are paying for it, anyways. 3.  · The pros and cons of family life involves the emotion, development and public assistance part of the authors views.  · Sometimes families, when poor steer to solidarity, willingness to share. This solidarity gives them a strong sense of priority for their families. This also helps the kids of these type of families to make better for their kids.  · There are joint parental responsibilities that are shared between the mother and father. Their responsibility is to, financially manage, companionship with children, discipline of children, and other family responsibilities. IN public assistance services, this type of way of family life doesn’t work. This is caused because of their amount of money, that they have coming in and it is hard for these type of people to agree on financial decisions, let alone take care of their children’s together.  · In these type of public assistance houses parents do not prepare their children for lives hardships, due to the fact that they only usually care about themselves.  · The house being ran by a woman has it’s pros and cons. A good thing is a women’s ambition and her efforts to make sure that her children have the best. I’m not trying to be stereotyping but most of them in public assistance housing, use their kids to benefit from the government funding and their kids usually see none of it.

Othello: Iago Makes Othello Believe His Wife Is Having An Affair Essay

Othello: Iago Makes Othello Believe His Wife Is Having An Affair In Shakespeare's "Othello," Iago carefully and masterfully entraps Othello into believing that his wife, Desdemona, is having an affair with Cassio. He does this through a series of suggestions and hesitations that entice and implant images into Othello's head that lead him to his own demise. More importantly, Iago gives Othello the motive to murder his own innocent wife Desdemona, satisfying Iago's immense appetite for revenge. The motive for Iago's devious plan is initially made clear in the first of three major soliloquies, in which he proclaims Othello has had an affair with his wife, Emilia: "And it is thought abroad that t'wixt my sheets/ He's done my office" (I.iii.381-383). The irony behind this line is where he continues: "I know not if't be true/ But I, for mere suspicion in that kind; / Will do as if for surety"(I.iii.383-385). Iago is so exceedingly paranoid and insane that he will go far as murdering, and deluding even a general into murdering his wife. Iago simultaneously conducts a devious plan to obtain Cassio's position as lieutenant, using Desdemona's prime weakness; her naivety. He disgraces Cassio by intoxicating him enough so he strikes Roderigo. Othello then discharges Cassio of his Lieutenancy when he says: "Cassio, I love thee,/ But nevermore be officer of mine" (II.iii.242-244). It was therefore understandable that he would fall to the mercy of Iago, completely oblivious to the inevitable effects. Iago reveals his plan to the reader in his third soliloquy when he states: His soul is so unfettered to her love, That she may make, unmake, do what she list, even as her appetite shall play the god With his weak function... And she for him pleads strongingly to the Moore, I'll pour this pestilence into his ear: That she repels him for her body's lust, And by how much she strives to do him good, She shall undo her her credit with the Moor (II.iii.330-350). &n... ...xpress their love and passion for each other: Othello: O my fair warrior! Desdemona: My dear Othello! Othello: It gives me wonder great as my content To see you here before me. O, my soul's joy (II.i.175-180)! Perpetual love and affection and contrasted with lusting animal attraction. What does Iago feel when he sees Othello and Desdemona together? How his mind must associate the same atmosphere with Othello having had an affair with his wife, enticing the "green-eyed monsters" within him. The feelings Iago feels is common jealousy. But to have it without surety, and to take it to such a great extent as to only describe it as being "mad." In an attempt at revenge, he does more than Othello supposedly did to him. By putting Othello through the same feelings he himself had gone through, he does not rid or relieve his feelings, but merely gains sadistic pleasure from brutal revenge That is not to say Othello is not a compelling and flawless character. Generally, it can be said that is more the function of our imagination and understanding of our own nature through which we determine Iago as who he is.

The Role of Women in Homers The Odyssey Essay -- Papers Odyssey Home

The Role of Women in Homer's The Odyssey Women form an important part of the folk epic, written by Homer, The Odyssey. Within the story there are three basic types of women: the goddess, the seductress, and the good hostess/wife. Each role adds a different element and is essential to the telling of the story. The role of the goddess is one of a supernatural being, but more importantly one in a position to pity and help mortals. Athena, the goddess of wisdom, is the most prominent example of the role; in the very beginning of the story she is seen making a plea for Odysseus' return home, and throughout the first half of the book she assists him in his journey. She is the driving force behind arranging Odysseus' return home from getting Kalypso to release him to making sure Nausikaa found him on Skheria. In books 1-4 she helps Telemakhos, Odysseus' son, gather the courage to go out and get news about his father. Other than Athena, there are many examples of goddesses taking pity on a mortal, usually Odysseus, and helping him out. When Odysseus is s...

A Comparative Essay between “Disabled” and “An Unknown Girl” Essay

Moniza Alvi reflects on India as her hand is hennaed by â€Å"an unknown girl† â€Å"in the evening bazaar†. The predominantly upbeat mood of this poem contrasts with the pessimistic mood in â€Å"Disabled† written by Wilfred Owen, a soldier in the First World War, stating his anti-war view through a poem on the life of a young soldier â€Å"sewn short at elbow†, crippled by war. In his poem, the difference between past and present allows Owen to reveal the regret and disappointment felt by the persona whereas, although Alvi portrays India as a magical, beautiful place where she experiences freedom, the ending reveals she will never be completely included. As such both poems illustrate longing but Alvi is longing for her identity whereas Owen is longing for his past life. To begin with, there is a difference in mood between â€Å"An Unknown Girl† and â€Å"Disabled† as Alvi creates an optimistic mood whereas Owen creates a predominantly depressing mood. Owen creates this by suggesting a theme of isolation felt by the persona which is implied in the first stanza when Owen says â€Å"mothered them from him†. The word â€Å"mothered† has caring, kind connotations but when used with â€Å"from†, it implies that he is not given the love and is actually an outcast which creates a strong negative mood as we can feel his seclusion. Similarly, â€Å"Espirit de corps† is said in an ironic tone which emphasises the fact that he is an outcast and that war does not leave you with glory or pride. This inspires pathos as everything has been taken away from him and he is no longer included, an idea which is further emphasised by the iambic pentameter in the first stanza, communicating the dull monotony of his life due to the isolation as he has no one to share anything with. Finally, the question at the end of the poem â€Å"Why don’t they come?† shows that he is literally waiting for someone to â€Å"put him into bed† as he is not able to do this himself. We can tell that he is waiting for night and the cyclical routine that repeats each day although he could be waiting for death as he has â€Å"a few sick years in Institutes† left which creates a powerful sorrow as he is still young. As this is the end of the poem, we are left with the image of him isolated and abandoned which is very striking. Owen further creates the pessimistic mood by suggesting the disappointment and lack of pride the persona has been left with after the war. Owen declares â€Å"no fears of Fear came yet† describing the persona before the war which groups all the fears and makes them seem overwhelming. This may suggest the persona is afraid of being a coward as he must appear strong and the personification of â€Å"Fear† makes him seem weak inside. This is emphasised by the use of â€Å"yet† as the persona now feels these fears after the horror of war. Later in the poem, the long stanza of hopes such as â€Å"For daggers in plaid socks; of smart salutes; And care of arms† contrasts with the short stanza for reality such as â€Å"Only a solemn man offered him fruits† revealing that his hopes for war were not met and he has been left with very little. This contrast is emphasised by the reaction of the people as he is â€Å"thanked† by â€Å"a solemn man† showing us that this â€Å"pity† makes him feel mocked. A miserable mood is portrayed as he has not received the celebratory â€Å"cheer† or â€Å"giddy jilts† he was expecting instead men â€Å"inquired about his soul† which portrays that the persona feels that these â€Å"cheers† are wrong therefore the man is making a mockery of him. The phrase â€Å"carried shoulder-high† depicts a glorious image to the reader as the persona recalls the excitement after a game of football. This excitement must have been similar to his expectations of war and when contrasted with the inglorious impression of life during and after war, the reader once again is forced to feel the sorrow and regret felt by the persona as Owen has effectively provided us with images and emotions. Furthermore, the persona appears bitter about going to war as he says â€Å"Smiling they wrote his lie† indicating their deception as they dropped â€Å"hints for young recruits† which is an exaggerated glorious image which Owen portrays as a lie. â€Å"Smiling† gives this a sinister feeling which emphasises the fact that he has been tricked and lied to in a bitter, uncaring way. We feel pathos as we can feel how powerful his bitterness is. Alternatively, to create an optimistic mood in â€Å"An Unknown Girl†, Alvi creates a theme of the magic that surrounds her in India. The repetition of the word â€Å"hennaing† emphasises the fact that it is external and decorative like a â€Å"shadow-stitched kameez†. This implies a beauty and since both objects are traditionally Indian, Alvi shows the reader that this is the overwhelming impression of magic she feels in India. The repetition of the word â€Å"neon† appeals to the visual sense as well as making the image it is used to describe seem more extreme with brighter, more defined colours. It seems almost too bright and colourful which creates a surreal and dreamlike atmosphere which portrays to the reader how enthralled Alvi is by the beauty of India she is witnessing. By describing her hennaed hand as â€Å"soft as a snail trail†, Alvi creates a magical mood by showing her astonishment. The word â€Å"soft† makes us feel comforted which is what the persona feels when in India. The sibilance in â€Å"soft† and â€Å"snail† creates a mysterious feeling which contrasts to the beauty of India, creating the longing Alvi feels for her identity. This is effectively emphasised by the childlike innocence portrayed to the reader through the words â€Å"balloons† and â€Å"icing†. In general, balloons are vividly coloured and could be used to symbolise the happiness and colour in the persona’s surroundings. The connotations we associate with â€Å"icing† are sweet and decorative which strongly suggests the happiness that Alvi is trying to portray. A â€Å"bazaar† is usually busy and crowded but Alvi foregrounds the colours and vibrancy to create a magical impression of the setting. This forces the reader to feel the magic Alvi is indicating. The image of a â€Å"peacock† is repeated as well as an â€Å"amber bird† which seems both magical and also beautiful and these are thing Alvi relates to India and the reader is forced to relate these as well. This is an intense image but could also be used to show that as a peacock can spread its tail, Alvi wishes to reveal a deeper truth about her identity. This very striking image is effective. Furthermore, the words â€Å"hushed†, â€Å"sleep† and â€Å"soft† subtly suggest to the reader the tranquil calm that Alvi feels while in India. This is contrasted with â€Å"firm† and â€Å"furious† to suggest exhilaration and happiness felt by Alvi as India has many different levels that we have been shown effectively throughout the poem. In contrast to the theme of isolation in â€Å"Disabled†, Alvi creates the impression of inclusion and reassurance that contribute to the upbeat mood. Alvi has written this poem to portray her search for personal identity as she was taken from her home in Pakistan while she was young so reassurance allows her to reconnect with the country of her heritage. The persona indicates her reassurance by creating a soft mood through the phrase â€Å"curtain cloth and sofa cloth canopy me† which is emphasised by the repetition of the word â€Å"cloth†. We also feel the inclusion Alvi is portraying as â€Å"canopy† gives the persona somewhere to hide and be protected so she is embraced. We feel this powerful yet soft inclusion throughout the poem. Alvi accents her inclusion with â€Å"I have new brown veins† as the verb â€Å"have† creates a tone of certainty. The implied pride allows us to feel that she does feel embraced by India and the reader feels embraced as well which allows us to join the lively mood. While having her hand hennaed, the persona depicts a â€Å"satin-peach knee† which relates to the skin or clothing of the Indian girl. The soft â€Å"s† sound in â€Å"satin† forces the reader to feel the calm, gentle atmosphere as well as depicting it as luxurious. Alvi implies that she relates these things to India which we then do and we feel a striking sense of her reassurance. Lastly the persona describes having her hand hennaed as â€Å"a peacock spread its lines† which shows that the India part of her identity is spreading itself too and she is becoming more at home. Although we do not feel at home, the reader can see the stunning beauty and can understand Alvi’s inclusion. Another difference in mood is the freedom created by Alvi contrasted with the dull gloom portrayed by Owen. Alvi displays a sense of freedom that originates from the beauty of India. There is no clear structure throughout the poem which to the reader may seem wild and chaotic but Alvi is powerfully trying to portray that this is part of her freedom. The short sentences create a fast pace which can be used to emphasise the emotion such as longing or desperation attached to longer sentences but also portrays a lively, excited feeling almost suggesting a sensory overload especially which is very effective as the reader too feels excited by the descriptions of India. The persona is trying to take in and communicate as much as possible. This is emphasised by the unequal line lengths which allows images such as â€Å"I am clinging† and emotions such as â€Å"are hushed† to be forced on the reader. These images and emotions are all subtly different as Alvi shows her freedom in India. The contrast between these further emphasises the freedom Alvi is portraying subtly. The dummies â€Å"tilt and stare† which contrasted with the dummies we consider normal creates the impression of disorganization which relates to all of India. Alvi feels this is her freedom and in this case, it is effective. On the other hand, Owen portrays the dull gloomy mood through the enjambment in the third and fourth line of the first stanza. It indicates how long the personas empty days are and is contrasted with the simple â€Å"play and pleasures† enjoyed by the young boys to create a dull atmosphere surrounding the lonely persona. This is very effective as the reader can feel this mood themselves. In the same stanza the phrase â€Å"saddening like a hymn† is used to create a gloomy atmosphere. In addition to the obvious connotations of saddening, Owens use of â€Å"hymn† suggests a solemn and mournful mood almost as though a part of him has died. By forcing the reader to feel these emotions, Owen has powerfully portrayed the persona’s melancholy. Due to his injury, the persona must now do what â€Å"the rules consider wise† which shows the persona no longer has freedom as â€Å"rules† have connotations of being strict which contrasts to the freedom and fun he experienced in the past. The word â€Å"wise† could also reflect on the fact that he has gained wisdom from the war due to bad decisions but this wisdom has come at the price of his happiness. This contrast shows the boring nature of his current life and the reader can feel his regret more powerfully with the image of his past happiness. The persona is described as wearing a â€Å"ghastly suit of grey† so the word â€Å"ghastly† forces the reader to think of a terrible image of the lonely man and then used with â€Å"grey† to make that image dull and lifeless. Overall this creates a gloomy visual image which is emphasised by the lack of emotion attached to the words creating an image which inspires sympathy from the reader. Finally Owen uses â€Å"shivered†, â€Å"cold and late† and â€Å"queer disease† to show how the despair is affecting the persona. He is literally cold although he may also feel cold inside as he has nothing left and is now isolated and alo ne. We can feel his sorrow which allows these words to effectively portray the dull mood to the reader. Owen also reveals a contrast inside â€Å"Disabled† as an alternate lively mood is portrayed in the past. The persona has â€Å"lost his colour† which is literally referring to the colour of his skin as he is now pale and he would have been flushed after playing football but additionally he has lost the bright glow of his youth during the war. The superficial meaning gives us a physical contrast between past and present but the alternate meaning allows the reader a glimpse at how his soul was affected. Owen distinguishes between this past excitement and the present day gloom. The persona is â€Å"waiting for dark† which is contrasted with the bright, colourful excitement felt in the past, portrayed in the second stanza. The word â€Å"waiting† implies that he is lonely because he has nothing left in his life which contrasts with â€Å"girls glanced lovelier† and romantic excitement from his past and is emphasised by the use of â€Å"dark† to suggest that he is waiting for night and the continuation of the cyclical routine that happens each day. The persona could also be waiting for death as this is a connotation of â€Å"dark†. These effective contrasts show his longing for the past and his dull life which inspires pathos from the reader. The reader also feels pathos because of the extreme contrast between past and present. Owen says â€Å"Town used to swing so gay† and the personification of â€Å"Town† gives it human emotions such as happiness that the reader is allowed to feel briefly. This creates a lively and upbeat mood in the past which is emphasised by â€Å"gay† but â€Å"used to† show the reader that this was in the past as it is written in past tense. This powerful contrast between past and present forces the reader to suffer the emotions the persona feels. Owen creates the impression of the excitement felt by the persona in the past through the contrast between leaving for war with â€Å"drums and cheers† and returning from war with â€Å"only a solemn man†. This contrast between his expectations and reality makes his past life seem exciting as he was popular but upon return, the persona feels bewildered by the lack of celebration. The difference between past and present shows us that this excitement was strong but short-lived and more pathos is inspired by that fact he feels pitied. Finally Owen says â€Å"Now, he is old;† which shows that the energetic past has gone. The word â€Å"old† is used to show that although his body is still young, the persona has physiologically aged and, in his current state, he is ancient. This contrast to his bright youth effectively makes us feel significant amounts of pathos. One of the main contrasts between these poems is within the theme of longing as Alvi portrays her persona longing for her identity whereas Owen suggests regret and longing for the past. Having been taken from her home whilst she was young, Alvi reveals that she longs for a home and to discover her personal identity in India through the repetition of â€Å"unknown†. Alvi implies that she needs to discover or recover the Indian part of her identity but additionally it is implied that she wishes to find her Indian blood so that she can reveal her full identity. This is powerful as we too feel the longing for her unknown identity and it is revealed further by the change in pace of â€Å"Now the furious streets are hushed† from fast to slow showing that she can’t hold onto the ever-changing India and her identity. This is emphasised by the use of â€Å"clinging† as this shows her desperation and the fact that India is constantly eluding her. This is very effective as we can feel her longing and have images to help. The â€Å"Dummies in shop-fronts† are described by Alvi using a tone of admiration illustrating a simple thing that clearly shows the intensity of her emotions and we too feel this intensity and passion for India. Lastly â€Å"float up† is implying a positive mood with â€Å"up† and a sense of freedom but it also shows that her identity keeps escaping and India keeps eluding her. Alternatively, Owen expresses the feeling of regret that comes from his longing which is emphasised by his realisation that his injury is his own fault although Owen depicts the persona’s anger towards the military which is similar to his own as Owen wrote most of his poetry whilst injured from war. Owen articulates â€Å"He thought he’d better join – He wonders why† and the pause after â€Å"he’d better join† shows that he is struggling to remember why he decided to fight in the war so therefore he is questioning his reasons. The phrase shows the insignificance of his reasons and leads to the persona regretting his decision. Similarly, the asyndeton in stanza five focuses on all the glorious things he briefly considered and indicates that he didn’t think about the effects of war, effectively portraying the impression of regret. Owen forces the reader to contrast the short time taken to make the decision with the lifetime he will have to suffer the consequences which evokes pathos as he does regret his choice. Owen describes the war as a â€Å"hot race† which provides a sense of chaos and disorder associated with the war by the reader. This gives the reader the strong feeling of exhilaration felt by the persona whilst fighting but the reader also gets the impression that this is different from the excitement and glory that the persona was expecting from war. This difference in emotion emphasises that the persona feels regret and the word â€Å"race† shows that although he will live with the consequences, the war was over quickly. This is very effective as we are forced to feel these emotions such as regret and exhilaration. The phrases â€Å"Poured away† and â€Å"threw away† show that the persona considers the choice he made wasteful sacrifice which emphasises the fact he feels regret for the foolish decision. The word â€Å"Poured† is foregrounded so he feels that he has done this to himself. This is very effective as we feel his regret strongly. Owen associates â€Å"giddy jilts† with going to war therefore showing that he was drunk and disorientated when he made the decision so he did it for foolish reasons and he now lives with regret. Ultimately the rhyme pattern that continues regularly throughout the poem could suggest that his decisions, made in the past, will carry on like the lines even after they have been made. Owen emphasises this regret by the longing created for the past. Owen contrasts â€Å"One time, he liked a blood smear† with the persona’s real injury to emphasis the fact that the persona is now â€Å"legless† but in those days he enjoyed the glorious side of injuries. This shows the powerful longing for the past but also indicates that the persona was more naà ¯ve in those days from the ironic tone. This is emphasised by â€Å"in the old times† as the tone is happy and warm but the use of â€Å"old† shows us that this was in the past and he no longer has these caring feelings. This illustrates the longing for the past although pathos is also created. The phrase â€Å"younger than his youth, last year† indicates that the persona wishes to have his past life back as his youth was the time of excitement and happiness and he no longer feels these things in the present. The pause shows he is struggling to compare the past and present which emphasises the fact the he wishes he could have his previous life back. This is a strong emotion and inspires much pathos from the reader. Finally the persona sees how the women’s eyes â€Å"Passed from him to the strong men that were whole† showing his longing for the past as he is comparing the way they look at him now to how they used to â€Å"glance lovelier†. This contrast shows how incomplete the persona feels as well as portraying to the reader that he is alone and deserted. This direct contrast between past and present allows the reader to feel precisely how strong the persona’s longing for the past is and how lonely he now feels. Although both Owen and Alvi both create an excited mood, there are different emotions created by the different types of excitement. The contrast between excitement and calm especially in the phrase â€Å"longing for the unknown girl in the neon bazaar† in â€Å"An Unknown Girl† allows Alvi to see both sides of India which makes her feel at home. The yearning showed by â€Å"longing† and â€Å"unknown† creates a calm atmosphere which is contrasted with â€Å"neon† to show both sides of India and give Alvi the feeling of her full identity. Alvi manages to force us to feel both the calm and excitement and we can almost feel the sense of belonging. In contrast, all the excitement in â€Å"Disabled† such as â€Å"he’d drunk a peg† and â€Å"he was drafted out† is used in the past tense which is then contrasted within the poem with the gloomy mood in the present to create a longing for the past and regret as well as the isolation of the persona. This inspires pathos as the images allow us to see how lonely the persona is and feel his regret. So therefore we can tell that the sensory overload that causes Alvi to feel such excitement and allows her to included in India contrasts with the past excitement making the persona in â€Å"Disabled† feel alone. But another way of looking at it is that this excitement pushes both persona’s away from the thing they desire; Alvi who desires to find her identity but is eluded due to the excitement in India and Owen who wishes for past enjoyment but now has a lack of vitality due to foolish excitement. However, one of the most striking differences between â€Å"An Unknown Girl† and â€Å"Disabled† is the persona’s choice and control of the situation. In â€Å"Disabled† Owen says â€Å"he asked to join† showing that not only was the persona given a choice but he chose to do the wrong thing although he was in control. This illustrates to the reader that it was the persona’s own fault and his decisions lead to his injury. He can’t blame the military for being â€Å"legless† although â€Å"smiling† and â€Å"lie† indicate his bitterness towards the commanders. Alvi portrays an image of the persona â€Å"hands outstretched† which shows that she is longing for this and is not in control although she is fighting from having her identity evade her again. She was not given a choice. This contrast makes Owen’s persona appear wasteful as he threw away his youth whereas Alvi has lost something she cares about. Alvi creates a subtle amount of pathos throughout the poem whereas we feel pathos for the persona in â€Å"Disabled† as he is having the realisation and it is already too late.

Iliad Theme Essay

Some people believe that the Iliad is a poem about death. However, some argue that the most important theme is war. Other themes of human experience such as jealousy, honor, or pride are seen in the poem, but I think the main idea of the poem is anger or rage and the results that occur from it. Death is a recurring subject in the Iliad along with graphic descriptions. Every man knows he will die at some point especially when going into battle. For example, Sarpedon says to Glaucus, â€Å"Ah cousin, if only we could quit this war and count on living without age or death, I would not head for the front ranks myself nor would I urge you to do battle there, but we are mortal and death’s faces stalk us in numbers such that no man can escape. So let us go, and take glory or give!† The war and other vengeful acts are included in the poem which cause death and horror, but the fundamental cause is a rage which builds up between the characters. In the war between the Trojans and Achaeans, men were killed and their comrades became enraged and wanted revenge. When Achilles lifelong companion Patroclus went into battle for him, Patroclus killed many Trojans causing Hector to become enraged. Hector killed Patroclus which caused Achilles to become so angry and seek revenge. He kills Hector with his spear and says, â€Å"Fool! Behind Patroclus a fierce avenger was waiting among the hollow ships . . .† Homer begins his poem in the first line, â€Å"Sing, goddess, of the wrath of Peleus’ son, Achilles.† My opinion is that the main idea of the Iliad is anger or rage which allows the author to develop all that follows through the consequences that follow. This is seen through the dissonance, estrangement, and eventual reconciliation between Agamemnon and Achilles.