Law Enforcement Research Design And Analysis Assignment 2 Coursework

Law Enforcement Research Design And Analysis Assignment 2 Coursework Law Enforcement Research Design And Analysis Assignment 2 – Coursework Example Running head: LAW ENFORCEMENT RESEARCH DESIGN AND ANALYSIS Lecture’s Introduction Law enforcement is a study that is meantto help get information based on law. This can be done by lawyers, law enforcement, defense and security sectors among others (University of Surrey, 2014). Law enforcement research design and analysis is a research design that is meant to help the researcher come up with a viable study that will help all the variables be captured and give response based on the research study. In this case multi of the data collection methodologies personality measures, performance, content analysis and questionnaires. Example of the questions used in the study research includes:a) What is the number of staffs involved in the crime management in the NSIS unit?b) How many individuals are involved in the decision making on crime management?c) How many lawyers took place in the decision making process?According to Gorard (2013) qualitative research is an education research that deals with views of the respondents. This asks general question, describes and analyses the words and later carries out enquiries on a biased and subjective manner. The example of the data collection methods includes observation, interviews, open ended questionnaires, focus group and content analysis.Examples of the qualitative questions include:a) What is the level of education that the field officers have on crime management?b) Who is the person in charge of the crime management?ReferencesCohen, N. & Arieli, T. (2011) Field research in conflict environments: Methodological challenges and snowball sampling. Journal of Peace Research. 48 (4), pp.  423–436.Freshwater, D., Sherwood, G. & Drury, V. (2006) International research collaboration. Issues, benefits and challenges of the global network. Journal of Research in Nursing, 11 (4), pp 9295–303.Gorard, S. (2013) Research Design: Robust approaches for the social sciences, London: SAGE.University of Surrey. (2014). La w enforcement defence and security research network. Retrieved April 2, 2014, from University of Surrey: https://www.surrey.ac.uk/leds/.

How to Punctuate Non-He Said Attributions of Quotations

How to Punctuate Non-He Said Attributions of Quotations How to Punctuate Non-â€Å"He Said† Attributions of Quotations How to Punctuate Non-â€Å"He Said† Attributions of Quotations By Mark Nichol The speaker of a quotation or a line of dialogue is normally identified in an attribution, a phrase as simple as â€Å"he said† that attributes the words to a particular person. However, there are other ways to attribute, including the ones illustrated in these examples, that don’t explicitly require an attributive verb. The sentences below illustrate the major difference between explicit and implicit attribution: punctuation (or lack thereof). (Note that explicit and implicit are not terms of art; I’m using them in the absence of, to my knowledge, any established terminology for these distinct types of attribution.) When â€Å"he said† or the like follows a quotation, it is preceded by a comma; if, less often, the attribution comes first, a comma follows it. Meanwhile, a colon, not a comma, should follow attributions such as â€Å"She had this to say in her defense.† But note the deletion of commas or colons in revisions to the following examples in which the attribution is merely implied: 1. â€Å"I had been opening my speeches with the line, ‘Are we entering a new era of American prejudice?’† When a sentence that includes a quotation does not include an explicit attribution, and the quotation is grammatically integrated into the sentence, omit any intervening punctuation: â€Å"I had been opening my speeches with the line ‘Are we entering a new era of American prejudice?’† 2. â€Å"‘The deepest bias in the history of the American people,’ is how historian Arthur Schlesinger Jr. referred to our nation’s history of anti-Catholic prejudice.† See the explanation of the revision above; the same guideline applies when the quotation opens the sentence: â€Å"‘The deepest bias in the history of the American people’ is how historian Arthur Schlesinger Jr. referred to our nation’s history of anti-Catholic prejudice.† 3. â€Å"You’ll be hearing from him again† was my friend’s guess. This sentence and its attribution are simpler than the preceding sentence and its attribution, but the rule is the same when a verb follows a quotation, punctuation after the quotation is unnecessary: â€Å"‘You’ll be hearing from him again’ was my friend’s guess.† 4. â€Å"I think they’re going to have that mentality of: ‘How dare he?’† In this case, punctuation is redundant to the preposition that precedes the quotation: â€Å"I think they’re going to have that mentality of ‘How dare he?’† The statement is colloquial; if it were not a direct quotation, it could be revised to a slightly more formal version: â€Å"I think they’re going to have that ‘How dare he?’ mentality.† 5. â€Å"To pass a necessity test usually means a negative response to the question: ‘Can the same result be obtained by other means?’† As in the first example, above, this sentence’s quotation is integrated into the flow of the sentence, so no punctuation is required: â€Å"To pass a necessity test usually means a negative response to the question ‘Can the same result be obtained by other means?’† Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Punctuation category, check our popular posts, or choose a related post below:When to Capitalize Animal and Plant NamesOne Fell SwoopThe 7 Types of Possessive Case

Host family Essay Example | Topics and Well Written Essays - 1250 words

Host family - Essay Example This was mainly due to the fact that most of the interactions that I came to experience as well as the culture of the society within which I lived was absolutely different from the one that I was used to. In fact, when one considers my experiences in the United States, one would say that it was a completely opposite from the way of life in China, my home country. When I first learnt that I my application for foreign exchange had been approved and that I was to go to Oregon, United States, I was extremely excited. This was mainly because I had never before left my home country and I was eager to experience another place which was dissimilar from home. I found out that I had been assigned a host family and while I met this news with some apprehension, since I did not know what to expect from these people, I later came to be glad that they had been selected for me. The family that I went to live with were known as the Johnsons, and they were honest and hardworking individuals who were a lso strong in their Christian faith, a fact that I found highly impressive. In my home country, where not many of the people are religious, and the latter is often discouraged, we has often heard rumour that the people in the west only professed the Christian faith yet rarely practiced it. The Johnsons, however, proved this impression to be wrong, and by their taking me into their home and treating me as one of their own, I felt like a real part of their family. Among the things that most impressed me about this family is that they had adopted a girl from China, treating her as if she was their own biological child through their provision of their love and support. Lily, the little girl, had been adopted as a baby when her parents died and she was left an orphan. Despite this tragic beginning of her life, Lily seems to have adjusted well to her new environment, to the extent of not remembering any Chinese, a fact that I learnt from my futile attempts to address her in her native lan guage. In China, I had learnt some English but while this had been the case, when I went for exchange, I could not speak it very well. Despite the language barrier between me and my host family, the latter took in stride and they often encouraged me to express myself the best way that I could through the use of my limited vocabulary. When all attempts at communicating using English failed, and it happened often, we would resort to using signs, a factor of communication that I found to be most interesting. The experience of the Johnsons when raising Lily might have helped a lot in their communication with me since after a fortnight or so; we could communicate with almost no problem at all since we had learnt each other’s speech and sign patterns. Since I went to school with the other two older Johnson children, Josh and Mary, who were close to my age and attended almost the same classes, I found it much easier to adjust to the new school environment than if I had had to go alo ne. These two, who became very close friends and my constant companions, gave me the motivation to learn my English so that I could communicate with them better. My thirst to learn might have also played a role in my wanting to better my English and in all my attempts, the Johnsons often gave me their support. Since I am a fast learner, within a few weeks of living with my host family, I could confidently express

Defines Compares and Contrast Coursework Example | Topics and Well Written Essays - 500 words

Defines Compares and Contrast - Coursework Example ther hand has been defined to be the putting together of creative ideas either in paperwork or in physical pattern to make the idea a tangible value (Zhao, Calantone and Cavusgil, 2002). Capron (1999) also mentioned that innovation represents the actual implementation of something that is new. From the definitions given, it would be noted that there are some ways in which all of these three important terms are different from each other and other ways in which they closely relate to each other. Comparing the three terms, Poon, Choi and Davis (2008) explained that all of innovation, design and creativity are needed in a typical organization to make the execution of organizational goals possible; especially in cases where organizations want to build a competitive advantage for themselves. By this explanation, the meaning that is drawn is that innovation, design and creativity are all focused on bringing about things that are new and different from what already exists. Therefore even though the three may carry different meanings, they are all concerned with new ideas because it is when organizations are able to differentiate themselves from others through creative, innovative and design oriented means that they gain competitive advantage over their competitors. Another important similarity that organizational leaders ought to know in the application of these three terms is that none of the three is independent on its own (Capron, 1999). Rather, they each depend on the other t o ensure the objectives for which they are independently set are achieved. By implication, even though each of these can help organizations achieve different objectives, the achievement will not be made if the three are not used together. Despite the similarities, there are various differences that exist between these three terms. For example, whereas creativity is abstract and produces abstract results, innovation is highly tangible as it results in implemented products. In effective, a person

European History Essay Example for Free

European History Essay The way the eastern civilization would live is how people dream of living today. The eastern peoples put others above themselves. The way the western civilization used to live is how we live today: caring about ourselves for the most part. Even though the eastern side of living is how most people wanted to live, there are some positive characteristics of the western side that are worth incorporating. A common problem today is that we don’t think. A trait of eastern culture is the being contemplative. There are countless problems that could be avoided if thought would have gone into the situation. Life is a strategy that is filled with decisions. It is inevitable that mistakes will be made, but there will be less if you think before you act. In life there are always consequences for your actions. What most people don’t realize is that there can be positive consequences. This is something that the western civilization honored; the rewards or the positive consequences of the life they lived. Having the good things in your life isn’t as rewarding as working for the grand prize. Towards the end of your life, what will you have that reflects what you work for? In the eastern civilization, working with less is held high in standards. As the years go by, people always want more and more but is it really necessary? For example, heated seats and electronic windows are nice in our vehicles but we don’t actually need them. The eastern peoples learned to work with what they were given, even if it was less than what they wanted. Technology is taking over the world. With this new interference with human life, the beautiful art of work will soon be forgotten. There are amazing things that humans can do as long as they work for it. The western civilization figured this out and put activity high on the list of standards. Life is short and there may be things that we miss if we don’t work to see what it has in store for us. Both the eastern and western civilization contain characteristics that would benefit the human race. A mixture of the two would be a perfect way to live. Placing others higher in value than yourself is a trait that isn’t common in the world today. Even though, putting others first is something great, you need to think about yourself too. You only have one life and one chance to make it the best. Do what makes you happy and you will see that others will come with you.

A Brave New World is Pending :: Brave New World Essays

A Brave New World is Pending In the March 6 issue of Science News, J. Raloff wrote "If pregnancies early in adulthood reduce a woman's lifelong risk of developing breast cancer, could short-term hormonal treatments that simulate aspects of pregnancy do the same thing? A new study suggest that the answer is yes." Reading that fast-forwarded my imagination to a horrible future, one described in Aldous Huxley's "Brave New World," where women of the future undergo surrogate pregnancies. In the book it was for mental reasons, but now, there's a physical reason to do such a hormonal treatment. How many other predictions will come true in the next, say, 20 years? Already we have television, airplanes, submarines, cyberspace and virtual reality. Is the next step a measurable move toward Utopia? Will we all live with perfect health? Will we stave off death so effectively that we are killed for population control reasons at the old, old age of 60? Will we lose sight of the goal of a long, productive life, abandon it for a long, forever young life (making aging a disease, because drugs to enhance the here and now build up to a painful later)? I'm all for advancement in medicine. My own father, an oncologist and hematologist, deals with ground-breaking new procedures and medicines on a daily basis. But to air out my cautious side: if the government ever starts worshiping Henry Ford, outlawing Shakespeare, instituting mandatory sterilization of certain groups of people, encouraging and perpetuating class divisions and distributing drugs to solve potential conflict, help me out by saying "STOP!" really, really loudly. Then again, this government does revere Henry Ford in a way. If a big car company wanted something done that was contrary to the desires of a community, my bets are on the car company. This thorough encouragement of big business and the tradition of such can almost be seen as worship. While Shakespeare hasn't been outlawed anywhere (as far as I know), teaching Darwin's theory of Natural Selection is banned in some school districts. J.D. Salinger's "Catcher in the Rye" is banned in some school districts. Ruth Sherman, a white teacher in a black and Hispanic neighborhood in New York, left her job in fear for her life over a book called "Nappy Hair": some parents (who of course, hadn't read the award-winning novel and for the most part weren't her student's parents) thought it was racist and divisive.

Booth Multiplier

Low Power Booth Multiplier by Effective Capacitance Minimization P. Nageshwar Reddy Dr. Damu Radhakrishnan Stu. in SUNY, New Paltz, NY Prof. in SUNY, New Paltz, NY Abstract: In this paper we present an energy efficient parallel multiplier design based on effective capacitance minimization. Only the partial product reduction stage in the multiplier is considered in our research. The effective capacitance is the product of capacitance and switching activity. Hence to minimize the effective capacitance in our design, we decided to ensure that the switching activity of nodes with higher capacitances is kept to a minimum.This is achieved in our design by wiring the higher switching activity signals to nodes with lower capacitance and vice versa for the 4:2 compressor and full adder cells, assuming the initial probability of each partial product bit as 0. 25. This reduced the overall switching capacitance, thereby reducing the total power consumption in the multiplier. Power analysis is do ne by synthesizing our design on Spartan-3E FPGA and used XPower Analyzer tool that is provided in ISE Xilinx 10. 1. The dynamic power for our 16? 16 multiplier was measured as 360. 4mW, and the total power 443. 31mW. This is 17. 4% less compared to the most recent design. Also we noticed that our design has the lowest power-delay product compared to the multiplier presented in the literature. Index Terms- Booth multiplier, Effective capacitance, 4:2 compressor. 1. Introduction A multiplier is the most frequently used fundamental arithmetic unit in various digital systems such as computers, process controllers and signal processors. Thus it has become a major source of power dissipation in these digital systems.With the exponential growth of portable systems that are operated on batteries, power reduction has become one of the primary design constraints in recent years. In the present era, each and every electronic device is implemented using CMOS technology. The three major sources of power dissipation in digital CMOS circuits are dynamic, short circuit and leakage [1]. Generally, power reduction techniques aim at minimizing all the above mentioned power dissipation sources but our emphasis is on dynamic power dissipation as it dominates other power dissipation sources in digitalCMOS circuits. The switching or dynamic power dissipation occurs due to the charging and discharging of capacitors at different nodes in a circuit [2]. The average dynamic power consumption of a digital circuit with N nodes is given by: where VDD is the supply voltage, Ci is the load capacitance at node i, fCLK is the clock frequency and ? i is the switching activity at node i. The product of switching activity and load capacitance at a node is called effective capacitance.Assuming only one logic change per clock cycle, the switching activity at a node i can be defined as the probability that the logic value at the node changes (0->1 or 1->0) between two consecutive clock cycles . For a given logic element, the switching activity at its output(s) can be computed using the probability of its inputs and is given by: where and denote the probability of occurrence of a ‘one’ and ‘zero’ at node i respectively. When Pi = 0. 5, the switching activity at a node is maximum and it decreases as it goes towards the two extreme values (i. e. both from 0. to 0 and 0. 5 to 1). The two main low power design strategies for dynamic power reduction are based on (i) supply voltage reduction and (ii) the effective capacitance minimization. The reduction of supply voltage is one of the most aggressive techniques because the power savings are significant due to the quadratic dependence on VDD. Although such reduction is usually very effective, it increases leakage current in the transistors and also decreases circuit speed. The minimization of effective switching capacitance involves reducing switching activity or node capacitance.The node capacitance de pends on the integration technology used. To reduce switching activity only requires a detailed analysis of signal transition probabilities, and implementation of various circuit level design techniques, such as logic synthesis optimization and balanced paths. It is independent of the technology used and is less expensive. Admiring the advantages of switching activity reduction, this paper focuses on switching activity reduction techniques in a multiplier. Digital Multiplication is done in three steps in a Booth coded multiplier.The first step is to generate all the partial products in parallel using Booth recoding. In the second step these partial products are reduced to 2 operands in several stages by applying Wallace/Dadda rules. These stages follow one after the other, feeding the output of one stage to the next. The final step is adding the two operands using a carry propagate adder to produce the final sum. Our main focus in this paper is the second step, partial product reduc tion. Fig. 1 shows the modified Dadda reduction tree for a 6? 6 unsigned multiplier, which uses full adders (FA) and half adders (HA) as basic elements.Stage 1 is the rearranged 6? 6 unsigned partial product array obtained using the partial product generator. At every partial product reduction(PPR) stage the number of bits with the same order (bits in a column) are grouped together and connected to adder cells following Dadda’s rules. Each column represents partial products of a certain magnitude. The sum output of a FA or HA at one stage will place a dot in the same column at the next stage and an output carry in the column to the left in the next stage (i. e. one order of magnitude higher). Fig. 1. Modified Dadda reduction tree for 6? unsigned multiplication The Wallace and Dadda designs use only FAs and HAs in the reduction stages, which form an irregular layout and increases wiring complexity. Wiring complexity is a measure of power. Since then Weinberger [3] has proposed a 4:2 compressor, the majority of the multiplier designs today make use of 4:2 compressors to increase the performance of the multiplier. They also contribute to power reduction as they decrease the wiring capacitance due to a more regular layout, contributing to fewer transitions in the partial product reduction tree. It also reduces hardware cost.The design of the 4:2 compressor got impoved in time, and modified design presented by Jiang et al. claimed improvements in both delay and power dissipation compared to earlier designs [4]. Several logic and circuit level optimizations are possible by using higher order compressors instead of simple FA cells for reducing the number of transitions in the partial product reduction stage. Because of this we used 4:2 compressors, FA (3:2 compressor) and HA cells in our partial product reduction stages. We reduced the switching activity by minimizing the effective capacitance at every node in the circuit.This stands as the main focus of this paper. This paper is organized as follows: related research in section 2 and 2. Related Research Many researchers have elucidated different low power multiplier architectures by using different techniques to reduce the total switching activity in a multiplier [ ]-[ ]. Ohban, et al. proposed a low power multiplier using the so called bypassing technique [5]. The main idea of their approach is to minimize the signal transitions while adding zero valued partial products. This is done by bypassing the adder stage whenever the multiplier bit is zero.Masayuki, et al. proposed an algorithm using operand decomposition technique [6]. They decomposed the multiplicand and the multiplier into 4 operands and using them they generated twice the number of partial products compared to the conventional multiplier. By doing this, they reduced the one probability of each partial product bit to 1/8 while it is 1/4 in the conventional multipliers. This in turn decreases the switching probability. Chen, et al. proposed a multiplier based on effective dynamic range of the input data [7].If the data with smaller effective dynamic range is Booth coded then the partial products have greater chances to be zero, which decreases the switching activities of partial products. Fujino, et al. proposed a multiply accumulate design using dynamic operand transformation technique in which current values of the input is compared with previous values [8]. If more than half of the bits in an operand change then it is dynamically transformed to its two’s complement in order to decrease the transition activity during multiplication. Chen, et al. roposed a low power multiplier, which uses spurious power suppression technique (SPST) equipped Booth encoder [9]. The SPST uses a detection logic circuit to detect whether the Booth encoder is calculating redundant computations which yield in Zero partial product and stops such PP generation process. To implement the basic principles used in all the ab ove mentioned multiplier architectures not only increase hardware intensity but also introduce delay in the operation. Also the extra circuitry employed to implement them consumes power.So our research interest is focused on techniques which decrease power without introducing any delay and additional hardware. Oskuii et al. proposed an algorithm based on static probabilities at the primary inputs [10]. At every PP reduction stage the number of bits with the same order of magnitude (bits in a column) are grouped together and connected to the adder cells in a Dadda tree. The selection of these bits and their grouping influences the overall switching activity of the multiplier. This was illustrated in Oskuii’s paper by referring to an early work, which is described below. Only one column per stage is considered here. As the generated carry bits from adders propagate from LSB towards MSB, optimization of columns is performed from LSB to MSB and from first stage to last stage. Thu s it can be ensured that the optimization of columns and stages that has already been performed will still be valid when later optimizations are being performed. * Glitches and spurious transitions spread in the reduction stage after a few layers of combinational logic. To avoid them is not feasible in most cases. Therefore it seems beneficial to assign short paths to partial products having high switching activity.Oskuii’s goal was to reduce the power in Dadda trees. The one probability for sum and carry of the FA and HA can be calculated from their functional behavior [10]. According to Oskuii’s algorithm, assuming the switching probabilities of partial products in a particular stage are calculated using the previous stage one probabilities and in each column and they arranged these partial product bits in ascending order. They first use the lower switching probability bits to feed full and half adders and transfer the higher switching probability bits to the next st age.From the set of bits to feed adders they tried to feed the highest switching probability signal to the carry input of the full adder as its path in full- adder is shorter than the other two inputs. Fig. 2. Example to illustrate Oskuii’s approach [10] Fig. 2 gives an example where 7 bits with the same order of magnitude are to be added. This is shown as the shaded box in the 2nd group of bits from top in Fig. 2. According to Dadda rules of reducing a partial product tree, 2 FAs must be used and one bit will be passed to the next stage together with the sum and carry bits generated by the full adders. s for i varying from 1 to 7 represent the switching probabilities of the seven bits. These are sorted in ascending order and listed as ? i* with the highest one as ? 1*. According to their approach, the bit with highest switching activity is kept for the next stage i. e. in Fig. 3. 2, and assign and to the carry inputs of the two FAs as their path is shorter and the other bits to the remaining inputs of FAs in any order. In this way they reduced the partial product tree by bringing the highest transition probability bits more closer to the output such that it reduces the total power in the multiplier without any extra hardware cost.Oskuii claimed that power reduction varying from 4% to 17% in multiplier designs could be achieved using their approach. On careful analysis of Oskuii’s work we notice that further reduction in power can be achieved. This is elaborated in our design presented in the next section. 3. Proposed Work By using a partial product generator (PPG) for the n? n multiplier employing radix-4 Booth encoder we obtained the required partial products. These partial products are then reduced to 2 operands employing several partial product reduction (PPR) stages. We used a combination of 4:2 compressors, FAs and HAs in reduction stages.At each stage modified Dadda rules are applied to obtain operands for the next stage. While minimizing the partial product bits in each column using 4:2/3:2 compressors and HA cells, emphasis was given on higher speed and lower power. Higher speed is achieved by allowing the partial product bits to pass through a minimum number of reduction stages, while minimizing the final carry propagate adder length to the minimum. Fig. 3. Proposed PPG scheme for a 16? 16 multiplier Fig. 3 shows the proposed partial product reduction scheme for a 16? 16 parallel multiplier.Nine partial products obtained by PPG are reduced to 2 operands using 3 reduction stages. The vertical green boxes in each column represent 4:2 compressors. It takes five bits and reduces them into 3 output bits, one sum bit in the same column position and two carry bits in the next higher significant column (one bit left) of next stage. The vertical red boxes represent full adder cells, which reduce three partial product bits in a column and generate the sum and carry bits. Similarly, the vertical blue boxes represent half add ers and add two partial product bits to reduce it to 2 output bits.The order in which the inputs are fed to 4:2 compressor, full and half adders is discussed in the next section. In Fig. 3 the maximum number of partial products in a column is 8 (columns 14 to 17). Since we are using 4:2 compressors that can take up to 5 input bits, to reduce the partial products in the first stage, we want to make sure that the maximum number of partial products in the next stage is only 5. This way we can reduce the bits in each column in stage 2 using one level of 4:2 compressors. And in the third stage, we want to ensure that the maximum number of bits in any column is only 3, so that full adders can be used to add them.This will permit the whole reduction process to be achieved in 3 stages. The half adder in column 2 in reduction stage 1 and the full adder in column 3 in reduction stage 2 are used so as to minimize the size of the final carry propagate adder. 4. Power Reduction Once the minimum number of reduction stages is established for a design, the next criterion is to minimize power consumption. This is achieved by delay passing and reducing the effective capacitance at every node in the reduction stages also following Oskuii’s rules (discussed in Section 2).To minimize the effective switching activity, the design must ensure that the switching activity of nodes with higher capacitance value must be kept to a minimum. This is achieved by a special interconnection pattern used in our design. The higher switching activity signals are wired to nodes with lower capacitance and vice versa. Our multiplier design uses the above idea to minimize power. This paper therefore focuses on selective interconnection of signals to the inputs of 4:2 compressors and FAs and HAs using the above concept.The logic diagram and the input capacitances for a full adder are shown in Fig. 4(a). For the following we will assume that each and every input lead to a logic gate is considered as one unit load (C1). Hence if a signal is connected to the inputs of two logic gates, then the load is two units (C2). From the logic diagram of the full adder in Fig. 4(a), input B is connected only to an XOR gate, where as inputs A and C are connected to both an XOR and a Mux. Hence, the input capacitance of the B-input is smaller than the other two inputs.The load presented by the B input is one unit load, while the loads presented by A and C are 2 unit loads. Hence a transition on input B will result in less effective capacitance. This is represented by the capacitance values C1 (1 unit load) and C2 (2 unit loads) as shown in Fig. 4. 9. Again by comparing the three inputs, the C input goes through only one logic device (XOR gate or Mux) before it reaches the output, where as both A and B goes through two logic devices before reaching the output. Hence, a transition on any of the inputs A or B could result in output transitions on all the three logic devices.But a transition o n input C will affect only two of these logic devices. Therefore we can conclude that even though the inputs A and C represent the same load, the overall switching effect on the full adder due to C input will be less than that due to A input. Hence, as a rule of thumb, the first two higher transition inputs among a set of three inputs that are given to a full adder should be connected to the B and C inputs and the last one to A. (a) (b) Fig. 4. a) FA logic diagram and input capacitances (b) 4:2 compressor logic diagram and input capacitances Similarly, the logic diagram of a 4:2 compressor and its input capacitances are shown in Fig. 4. (b). The input capacitances presented by X1, X3, X4 and Cin are twice that presented by X2. Hence, the highest transition probability signal must be connected to the X2 input. Again by using a similar argument as in the full adder, the second highest transition probability signal must be given to the Cin. The remaining inputs are given to X1, X3 and X4 in any order. This minimizes the overall effective capacitance in a 4:2 compressor.The probability of a logic one at the output of any block is a function of the probability of a logic one at its inputs [11] [12]. From the logic functions of 4:2 compressor, FA and HA we can calculate their output probabilities knowing their input probabilities. Table 2: Probability equations for 4:2 Compressor | 4:2 Compressor| PSUM| | PCout| | PC0| | Table 1 shows the probability expression for the sum and carry outputs for the full adder and half adder in terms of their input signal probabilities. The 4:2 compressor output probabilities are shown in Table 2. By comparingTables 1 and 2 we can say that the statistical probabilities of the output signals of basic elements (4:2 compressors, full adders and half adders) used in partial product reduction stages vary. Table 3 shows the output signal probabilities of 4:2 compressor, full adder and half adder, assuming equal ‘1’ probabiliti es of 0. 25 for all inputs. In each partial product reduction stage the signals in a particular column have different switching probabilities. The output signals of one stage become inputs to the next stage. So the switching probabilities of the outputs diverge more as we move down the partial production reduction stages.Table 3. 1: Output Signal Probabilities of FAs and HAs | Full-adder| Half adder| SUM| | | CARRY| | A. B| PSUM| | | PCARRY| | | Table 3: Output probabilities of 4:2 compressor and adder cells Input signal probabilities = 0. 25| 4:2 compressor| Full adder| Half adder| SumCoutC0| 0. 48440. 15630. 2266| SumCarry| 0. 43750. 1563| SumCarry| 0. 3750. 0625| Several reduction stages are required to reduce the partial products generated in a parallel multiplier. As shown in Fig. 3, at each stage a number of bits with the same order of magnitude are grouped together and connected to the 4:2 compressors and adder cells.The selection of these bits and their grouping influences t he overall switching activity of the multiplier. This is what we will exploit to reduce the overall switching activity of the multiplier. Fig. 5 shows the array structure of the proposed partial product reduction scheme for a 16? 16 multiplier. In the following we assumed that the one probability of all the 9 partial product bits are same and is equal to 0. 25 (as discussed in Section 3. 26). These 9 partial product bits are fed to 4:2 compressors, full and half adders and are reduced to 5 operands. The bits in these 5 operands will have different one probabilities.From these one probabilities we can calculate their switching probability. If we look at each column all the bits in that column have the same weight but different one probability. So we have enough freedom to choose any of these signals which can be connected to any of the inputs of the basic elements. The way these signals are wired to basic elements to achieve reduction will affect the total power consumption in a mult iplier. Show an example Fig 5 shows how we wired the input signals to 4:2 compressors and full adders in the proposed design. To illustrate the principle consider column 16 of reduction stage 2 in Fig. , where we have five bits with the same order of magnitude, which are to be wired to the inputs of a 4:2 compressor. The first higher transition bit is fed to X2 input and next higher transition bit is fed to Cin, as they provide lower switching activity when compared to others. The remaining three bits can be fed to X1, X3 and X4 in any order. Similarly on column 11 in reduction stage 3, three bits of the same order are to be added. The highest transition bit is given to B input of the adder and the next higher transition bit is fed to C input. The third bit is fed to A input.This way of feeding the inputs, we can decrease the output switching probabilities of compressors and adders. By applying the same technique to every stage we can reduce the overall switching capacitance of the multiplier, thereby reducing power. Fig. 5. Wiring patterns for 4:2 compressors and full adders 5. Simulation Power analysis was done by synthesizing our 16? 16 multiplier design on Spartan-3E FPGA and using XPower Analyzer tool provided in ISE Xilinx 10. 1. We evaluated the performance of our 16? 16 multiplier by comparing with the conventional Wallace and Oskuii’s multipliers.Table 4 shows the quiescent and dynamic powers of different multipliers obtained by simulation. The quiescent power is almost the same for all multipliers. The dynamic power for our design is only 360. 74 mW, where as Oskuii’s and Wallace multipliers consume 454. 06mW and 475. 08 mW respectively. Hence the total power consumption is only 443. 31mW for our multiplier, which is less by 17. 39% and 20. 51%, compared to Oskuii’s and Wallace multipliers. Table 4: Power reports from simulation for a 16? 16 Multiplier Design| QuiescentPower (mW)| DynamicPower (mW)| TotalPower (mW)| Our Design| 8 2. 7| 360. 74| 443. 31| Oskuii’s Design| 82. 57| 454. 06| 536. 63| WallaceMultiplier| 82. 67| 475. 08| 557. 75| Table 5 Power-Delay products of 16? 16 multipliers Design| Total Delay (ns)| Power (mW)| Power-Delay Product| Our Design| 30. 889| 443. 31| 13. 693*10-9| Oskuii’s Design| 31. 219| 536. 63| 16. 753*10-9| WallaceMultiplier| 35. 278| 557. 05| 19. 651*10-9| Table 5 shows the power-delay products of different multipliers. Smaller the power delay product of a multiplier the higher is its performance. Our design has the shortest delay of 30. 889ns, compared to 31. 219ns and 35. 78ns for Oskuii’s design and Wallace’s design respectively. Hence our design has the lowest power-delay product compared to both Oskuii’s and Wallace multipliers. 6. Conclusions We have presented an investigation of multiplier power dissipation, along with some techniques which allow reductions in power consumption for this circuit. Given the importance of multipliers, it is essential that further research efforts are to be directed in the following ways. * In this thesis the switching activity criteria for the interconnection pattern in 4:2 compressors was used only for two of the inputs of the 4:2 compressor.The interconnections of signals on the other three inputs are made without any importance given to their switching activity. This is because at the gate level, the load capacitance at a node is measured simply based on the number of connections made at that node. In the 4:2 compressor, three of the inputs are feeding two inputs each (except the carry input). Hence, we consider them with the same load capacitance. In reality, this is not true. To get an accurate estimate on capacitance, an actual layout of the cell has to be made using VLSI layout tools and then their capacitances are to be extracted.Hence further research could focus on the above so as to find an ordering for these inputs based on their capacitance values. Also, different impl ementations of 4:2 compressors may be compared so as to select the one with the lowest capacitance values. * Extending the proposed interconnection technique to the partial product reduction stage by employing higher order compressors such as 5:2, 9:2, 28:2, etc. In this manner, different architectures using various combinations of compressors in the partial product reduction stage can be compared so as to select the best one with the lowest power dissipation for any multiplier.References 1] D. Soudris, C. Piguet, and C. Goutiset , Designing CMOS Circuits for Low Power. Kluwer Academic Press, 2002. [2] L. Benini, G. D. Micheli, et al. , Dynamic Power Management Design Techniques & CAD Tools. Norwell, MA: Kluwer Academic Publishers, 1998. [3] A. Weinberger, â€Å"4:2 Carry Save Adder Module,† IBM Technical Disclosure Bulletin, vol. 23, 1981. [4] S. F. Hsiao, M. R. Jiang, and J. S. Yeh, â€Å"Design of High-Speed Low-Power 3-2 Counter and 4-2 Compressor for Fast Multipliers,â €  Electronics Let. , vol. 34, no. 4, pp. 341-342, 1998. [5] J. Ohban, â€Å"Multiplier Energy Reduction Through Bypassing of Partial Products† in Proc. Asia-Pacific Conf. on Circuits and Systems, vol. 2, pp. 13–17, 2002. [6] M. Ito, D. Chinnery, and K. Keutzer, â€Å"Low Power Multiplication Algorithm for Switching Activity Reduction Through Operand Decomposition,† 21st Int. Conf. on Computer Design, 2003. [7] O. T. Chen, S. Wang, and Yi-Wen Wu, â€Å"Minimization of Switching Activities of Partial Products for Designing Low-Power Multipliers,† IEEE Trans. on VLSI Syst. , vol. 11, pp. 418 – 433, 2003. [8] M. Fujino, and V. G. Moshnyaga, â€Å"Dynamic Operand Transformation for Low-Power Multiplier-Accumulator Design,† in Proc. of the Int. symp. n circuits and systems, 2003. [9] K. H. Chen and Y. S. Chu, â€Å"A Low Power Multiplier with Spurious Power Suppression Technique,† IEEE Trans. VLSI Syst. , vol. 15, no. 7, pp. 846-850, 20 07. [10] S. T. Oskuii, â€Å"Transition-Activity Aware Design of Reduction-Stages for Parallel Multipliers,† in Proc. of Great Lakes Symp. on VLSI, 2007. [11] K. Parker and E. J. McCluskey, â€Å"Probabilistic Treatment of General Combinational Networks,† IEEE Trans. on Computers, C-24: 668-670, June 1975. [12] M. Cirit, â€Å"Estimating Dynamic Power Consumption of CMOS Circuits† in Proc. of ICCAD, pp. 534–537, 1987.

The Comparison Between Recession and Great Depression

THE COMPARISON BETWEEN GREAT DEPRESSION AND RECENT RECESSION AND THEIR EFFECT IN CUSTOMER SERVICE The Great Depression had a great impact in the United States economy from 1929 to the late 1930s. Many people lost their jobs, savings, and homes. They were not sure about their future.Also, at the end of 2008, the United States and many developed countries faced a great recession than had paralleled the Great Depression, such as: excessive credit given to normal citizens (which was promoted by Federal Reserve Bank), irresponsible money spending by the people in the United States that spread to the most countries in the world, the stock market crash, and the failure of the real state market.Although, the lessons that governments learned from the Great Depression made them to be creative in preventing the 2008 recession becoming another great depression, or at very least try to postpone this issue by being united to bail out private sectors specially financial institutions. It is very int eresting that all the developed countries ignored to correct many problems that could prevent the 2008 recession. After the First World War, Germany and many other European countries tried to recover from the great financial damage that was caused by the war.They needed money to rebuild their countries, and the United States started to give excessive line of credits to the above countries. Also, because the United States’ economy was booming by growth in the industrial sector which brought many people to work for factories and auto makers. Gradually, many companies started to solicited to sell their product on credit instead of cash, and in the beginning of the 1920s , more families were getting familiar with getting installment loans to buy their needed products. Also, many banks started to loan farmers which brought a great amount of cash flow for many farmers.Furthermore, this economy boom made the rise in the stock market. It was for the first time that the margin was int roduced to the stock market, which simply meant that stock buyers can borrow money against heir stocks as collateral to buy more stocks. Many citizens borrow a lot of money from banks, and put their own savings to buy more stocks. T his greedy action made a bubble in the stock market and made it soared in 1920s, not because of fundamentals or corporations productions and profits, but for false expectations of stock buyers.Of course, this bubble came to the end at October 29, 1929, that is known as a black Tuesday. In this day stock market was crashed. And over a two years period lost 24 % of its value. Black Tuesday also represents the beginning of the Great Depression; during this period many Americans lost their jobs, houses, and farms, because they couldn’t afford to pay their installment loans any more. For many years American farmers overplanted their farms, and poorly managed their crop rotations.Between 1930 to 1936, when droughts conditions made a great damage to many farms, and prevailed a cross a lot of Americans plains. Dust bowl was created. The dust storm started to harm some states like Colorado, Texas, Kansas, Oklahoma, and later on spread cross entire United States. The dust bowl got its name after Black Sunday, April 14, 1935. More and more dust storm destroying plains, up to that year. Before the Great Depression because a lot of European countries started to improve their agriculture in mid 1920s, it created a mass produced and great reduction in farming products.To protect the domestic American farm products against agriculture imports, US government raised US tariffs to the high level, which is also known as the Smoot-Hawley Tariff Act of June 1930. Because there was less demand for consuming products except food, therefore factories had to fire many of their workers which were another cause to the Great Depression. Primary sector industries such as cash cropping, mining and lodging suffer the most. Many Americans were going through a very difficult time and couldn’t even afford to buy foods.The shelters were full and America and many countries were filing for bankruptcy. The American dollar and many European currencies were not back up by gold any more. The items like cars which were considered a luxury material, and cost fortune at one time, did not worth any more. One of the main other causes for the Great Depression was Failure of the banks around the world including the United States that created by the crashing of the stock market , and filing bankruptcy by all developed countries.Bank couldn’t loan no more to their customers therefore they began to collapse and were closed. President Roosevelt tried to offset the economy by creating a lot of jobs in public sector in 1930s by making Hoover’s Dam or cleaning streets by the public. This strategy by itself didn’t change the economy per se, so by the end of 1939, there was still no improvement in US economy. The main reason for th e recovery was in the beginning of 1941. The World War II made many countries in Europe to import again from the United States that gradually created many jobs by reopening major factories.One of the great similarities of the Great Depression and the recent recession were the failure of financial corporations, crash in the stock market which was created by the same reason ( giving excessive margin buying power to stock holders) , and greed by wealthy people. Although, the booming real state from 2003-07 could be considered as some distinguished factors. There are a lot of lessons we can learn form the Great Depression and recent rescission that deregulating stock market and financial sector and handing an economy to the big corporations doesn’t have any consequences but a disaster to average citizens.Customers would lose a lot of their purchase power in a great deal, during recession or depression. Therefore, companies must sacrifice to drop the value price of their services and products, and do whatever it takes in order to keep their customers. During this time it is a customer or a buyer market. If the companies lose their consumers to the competitors due to the lack of customer service, it would be very hard to replace that. The margin profit would be very low and it would leave the companies with no choice but to cut the cost and overhead expenses.Companies should consider that â€Å"the customers are always right and they should be heard at any times†. They have to come with any creative idea to improve their relations with their customers. In conclusion, we have to learn many lessons from the great depression and the recent recession. With comparing the roots for these two economy disasters, we would have the better understanding that how companies improve their customer service during the financial difficulties for their customers and consumers.

Social Security Number Allocations by Location

Social Security Number Allocations by Location The first three digits of a persons Social Security number numbers can often help you to determine where your ancestor may have possibly been living when his/her SSN was issued (see exceptions below). These numbers can also be helpful in determining which listings in the SSDI may belong to your ancestor. The first three digits of a persons Social Security number were, prior to 1973, determined by the state where the person applied fo their social security card. Since that time, the first three digits have been assigned based on the ZIP Code of the mailing address on the Social Security number application. The chart below shows the first 3 digits of the social security numbers assigned throughout the United States and its possessions. SOCIAL SECURITY NUMBER STATE CODES * The same number, when shown with more than one area, means that certain numbers have been transferred from one State to another, or that an area has been divided for use among certain geographic locations. Learn more about the other numbers in the Social Security Numbering Scheme.

The Geography of Earths Equator

The Geography of Earths Equator Planet Earth is a roundish planet. In order to map it, geographers overlay grid of lines of latitude and longitude. Latitudinal lines wrap around the planet from east to west, while longitude lines go from north to south. The equator is an imaginary line that runs from east to west on Earths surface and is exactly halfway between the north and south  poles (the northernmost and southernmost points on the Earth). It also divides the Earth into the northern hemisphere and the southern hemisphere and is an important line of latitude for navigational purposes. It is at 0 ° latitude,  and all other measurements head north or south from it. The poles are at 90 degrees north and south. For reference, the corresponding line of longitude is the prime meridian. Earth at the Equator User:Cburnett / CC BY-SA 3.0 / Wikimedia Commons The equator is the only line on the Earths surface that is considered a great circle. This is defined as any circle drawn on a sphere (or an oblate spheroid) with a center that includes the center of that sphere. The equator thus qualifies as a great circle because it passes through the exact center of the Earth and divides it in half. Other lines of latitude north and south of the equator are not great circles because they shrink as they move toward the poles. As their length decreases, they do not all pass through the center of the Earth. Earth is an oblate spheroid that is slightly squished at the poles, which means it bulges at the equator. This pudgy basketball shape comes from a combination of Earths gravity and its rotation. As it spins, Earth flattens just a bit, making diameter at the equator 42.7 km larger than the diameter of the planet from pole to pole. Earths circumference at the equator is 40,075 km and  40,008 km at the poles. Earth also rotates faster at the equator. It takes 24 hours for the Earth to make one full rotation  on its axis, and since the planet is bigger at the equator, it has to move faster to make one full rotation. Therefore, to find the speed of Earths rotation around its middle, divide 40,000 km by 24 hours to get  1,670 km per hour. As one moves north or south in latitude from the equator the Earths circumference is reduced and thus the speed of rotation decreases slightly. The Climate at the Equator The equator is distinct from the rest of the globe in its physical environment as well as its geographic characteristics. For one thing, the equatorial climate remains much the same year-round. The dominant patterns are warm and wet or warm and dry. Much of the equatorial region is also characterized as being humid. These climactic patterns occur because the region at the equator receives the most incoming solar radiation. As one moves away from the equatorial regions, solar radiation levels change, which allows other climates to develop and explains the temperate weather in the mid-latitudes and the colder weather at the poles. The tropical climate at the equator allows an amazing amount of biodiversity. It features many different species of plants and animals and is home to the largest areas of tropical rainforests in the world. Countries Along the Equator In addition to the dense tropical rainforests along the equator, the line of latitude crosses the land and water of 12 countries  and several oceans. Some land areas are sparsely populated, but others, like Ecuador, have large populations and have some of their largest cities on the equator. For example, Quito, Ecuadors capital, is within a kilometer of the equator. As such, the citys center features a museum and monument marking the equator. More Interesting Equatorial Facts The equator has special significance beyond being a line on a grid. For astronomers, the extension of the equator out to space marks the celestial equator. People who live along the equator and watch the sky will  notice that the sunsets and sunrises are very fast and the length of each day remains fairly constant through the year.   Sailors of old (and new) celebrate equator passages when their ships cross the equator heading either north or south. These festivals range from some pretty raucous events onboard naval and other vessels to fun parties for passengers on pleasure cruise ships. For space launches, the equatorial region offers a bit of a speed boost to rockets, allowing them to save on fuel as they launch eastward.   Edited and updated by Carolyn Collins Petersen.

High-speed Train Essay Example | Topics and Well Written Essays - 1500 words

High-speed Train - Essay Example According to Secretary Ray LaHood, "8 billion dollars has been set aside for high speed rail. What jump starts our opportunity in America is the President's initiative that Congress passed to put $8 billion in the economic recovery" (Secretary Ray LaHood, D.O.T) I believe that the construction and usage of high speed train transportation between these 2 metropolitan areas would effectively reduce pollution and congestion, as it will take many cars off the roads. It is estimated that about 170,000 vehicles travel the I-15 into Las Vegas. Woody Woodrow, who is a resident of Las Vegas and a native of Los Angeles, stated that "if the price was right and the timing was right and it took less than a flight to get here, I would absolutely take it. I think it's a great idea" (Woodward Woody, Las Vegas resident) High speed rail can be said to be a proven technology, as decades of experience on the use of high speed rail in other parts of the world have shown. Thus, high speed rail provides a comfortable and convenient way for Americans to travel from one city to another. These 2 cities should endeavor to avail themselves of this technology in a comprehensive manner, as there has been heavy investment in this mode of mass transit. The population of both cities is expected to continue to rise significantly over the next few decades and although an inability to travel quickly by high speed rail between Los Angeles and Las Vegas might not currently look like a major deficiency, it probably would appear to be so in the next few decades. According to Wilton Woods (1989) "future intercity future intercity passenger mobility will be dependent on fully utilizing all of the available options. However, much of the criticism of high speed rail is based on concerns about its cost-effectiveness in the ne ar to medium term. This is of particular concern since HSR is likely to rely more heavily than other modes (automobile, air, and intercity bus) on general tax revenues as opposed to user fees/taxes, although the user fees/taxes that support those other modes may not cover their so-called externality costs i.e. costs that those modes impose on other people, such as environmental pollution and deaths and injuries due to crashes" (Wilton Woods 1989) Critics of high speed rail travel say that it is not very cost effective, but numerous benefits have been cited in support of the development of high speed rail, including the reduction of pollution and energy usage in the transportation sector, the potential to alleviate airport and highway congestion, improving transportation safety, promoting economic development, the provision of more options for travelers, and increasing the reliability of transport by increasing redundancy in the transportation system. Alleviation of congestion in airports and highways High speed rail has the capability of relieving air traffic and highway congestion in heavily traveled corridors. The use of high speed rail