Research paper 2 Example | Topics and Well Written Essays - 500 words

2 - Research Paper Example y, I chose these two buildings because the architects who designed these building were revolutionary professionals in American architecture hence their impact on modern architecture. My intention is to compare these two structures to Tikal architecture from a visual interpretation, that is, a visual analysis of these structures. The various architectural styles and patterns employed in early days as well modern days depict a society’s way of life especially religious life. For instance, the tikal architectural design were adjusted in such a way to incorporation nature and worship of God The Wayfarers Chapel was designed by Lloyd Wright and was completed in the year 1951. This architectural structure is located at Rancho Palos Verdes, California. This structure is mostly notable because of its modern unique architectural design and its location at the cliffs of the Pacific Ocean. In fact, it is part of the Swedenborgian Church of America and is used as a memorial to its founder, Emanuel Swedenborg. Lloyd Wright, the architect given credit for this structure began designing it in the late years of the 1940s and construction began in the year 1949 and lasted for several years until the year 1951 when it was completed. In developing this design, Lloyd wanted to create a serene environment where travelling Christians would take a rest and be close to nature and to God. His inspiration came from the Redwood forest in California. He had visited a restaurant within the forest with tree branches bending over the building and he was awed by this scenes. Similar to most of Lloyd Wright’s building the structural incorporates the natural landscape into its design and features magnificent modern designs. The design for this building is a â€Å"tree chapel† set amongst trees, a natural sanctuary. This is a quintessential structure of organic architecture. The architect used glass to allow natural light, natural growth, the adjacent sea and the sky to create the sense of a

Marketing Manager of the PVT Research Paper Example | Topics and Well Written Essays - 1000 words - 1

Marketing Manager of the PVT - Research Paper Example Thus, when it declines to list PVT among it best bidders, then there must a gross system or technological failure that Greg Morgan, the Solenergy’s chief electrical engineer noted from the electric equipment supplied to them by PVT. Morgan is portrayed as a competent person, especially in his judgments. Moreover, he has never misled Solenergy Company and its management in all matters left for him to deliberate upon thereby earning him the influence he has in the Solenergy development industry’s decision-making. Therefore, it will be pointless for the sales and marketing department of the PV Technologies, Inc. to peg their success on the personal relationship between Morgan and Salvatori. Apparently, the decision made from Morgan’s evaluation may not change based on the employee to employee relationship or business to business relationship but they can change on core values used as evaluating factors that led to the conclusion (Cespedes and Badame 05). From the understanding of the top management at the PV Technologies, PVT has been supplying reliable, durable, and efficient converters a fact that has not been confirmed by the customer, Solenergy in this evaluation. The evaluation parameters and the result are just but rumors that are yet to be confirmed to the PVT’s sale and marketing department or even to its executive. Therefore, it cannot be assumed that Morgan only pegged his evaluation on cost but not other factors that could be touching quality, efficiency, effectiveness, and durability. Moreover, it is apparent that PVT has been the main player in the market especially in the supply of electric converters. Since numerous players who have joined the same market, PVT must not assume that there are no other companies producing the same products, as in this case, converters with the same quality, durability, efficiency, and effectiveness and at lower costs than it thereby placing out of the  competition is.

Transformational Leadership Plan Essay Example for Free

Transformational Leadership Plan Essay Leadership refers to a person’s ability to affect another person’s or group’s behavior in order to achieve a certain purpose.   Leadership has always been an important aspect of teamwork. In politics, sports, corporate world and all aspects of life, leadership has an important role to play. Today however, leadership needs to incorporate new and innovative methods to ensure that team members, groups and individuals are influenced by the decision of the team leader. Effective leadership is when a leader is able to have an impact of his decisions, thoughts and views on other individuals. In today’s world, leadership is playing a pivotal role in shaping organizations and ensuring goal achievement. The role of a leader is pivotal in building successful teams and achieving targets. It is through an effective leadership style and middle management cooperation that targets are achieved (Tichy Devana, 1997). Successful leadership strategies therefore need to be implemented. According to the leadership model, a successful or effective leadership strategy include the incorporation of five basic elements; emotional intelligence, relationship, teamwork, performance and operations (ETD). Emotional intelligence refers to a person’s ability to understand others. Relationship refers to maintaining a harmonious working rapport and managing emerging conflicts. Teamwork refers to including members from diverse backgrounds and inculcating the ability to adjust to with different people for a common purpose. Operation refers to managing resources and ensuring quality levels. Performance refers to the policies and procedures that measure the quality and level of output (ETD). It is the effective incorporation of all these five elements that ensures a successful leadership strategy. Other elements that should complement these basic elements include motivational tools, leadership engagement and individual development. Emotional intelligence is the key element of leadership. It is imperative that a leader understand how the other organizational members feel about a certain subject. He needs to be able to think from their perspective to understand their stance on a specific issue. Once the leader is able to relate with other members, he can develop a rapport that is going to benefit the organization in terms of goal achievement. The relationship aspect of leadership comes into play after emotional intelligence. The leader’s ability to understand members helps him build a relationship that forms the basis of the organization’s culture and working environment. It is this long-lasting relationship that allows an organization to continue operating successfully. Teamwork is the result of a relationship. It ensures that all members are fully aware of the other members’ strengths and weaknesses and complement each other’s work. It is this joint effort of team members under the supervision of a leader that ensures the successful completion of a task. The next important aspect of leadership is the ability of the leader to ensure high performance. A successful leader will not only maintain high performance standards but also appreciate the good performance of members and reward them accordingly. The last basic element of successful leadership is operations. Under good leadership high quality output and customer satisfaction will be the main objective and a leader will integrate all other elements to ensure this. Furthermore, motivational tools such as specific reward structures, employee appraisals and non-monetary rewards such as employee of the month can be used by leaders to motivate their employees. Moreover, leadership engagement which involves a leader’s constant interest in his employees induces a strong desire in the employees to perform well. Also a successful leadership strategy requires the leader to coach and teach the employees during the process to enhance the employees’ individual development. Leader participation is an important tool to enhance leadership effectiveness. According to Victor Vroom’s Leader-Participation Model, there are certain rules which determine the form and amount of leader involvement in particular situations (Robbins Judge, 2008). Therefore each situation demands a different level of leadership from the leader. An effective leader will adapt to a situation and guide his team accordingly. Another aspect of an effective leadership style is the adaptation to the team’s readiness. According to the Situational Theory of Hersey and Blanchard, successful leadership can be achieved by the selection of the right leadership style which is dependent on the team’s inclination towards a job (Robbins Judge, 2008). My main leadership strength lies in my ability to resolve conflicts and maintain a harmonious team to fulfill the required objectives. However, it is also important to allow other team members to communicate their views and ideas and therefore arguments are certainly constructive. However, if these arguments endanger team unity, I have the ability to resolve the arguments. Another strength that enhances my leadership ability is my involvement with other team members. I make sure that I apprise myself of all the activities being carried out by my team mates so that I know the progress and status of the task. I make sure that my team members understand their responsibilities and work thoroughly and carry out their assigned task keeping in consideration the final objective. Also, as a leader I sit with my team mates and share all important information regarding the project with them to ensure that they do not feel alienated. Moreover, as a leader it becomes my responsibility to give my team mates constant feedback on their work. I ensure that I take into consideration their efforts and complement them for their work. However it is also important to identify their mistakes in order for them to correct it and avoid it in future. In doing so I have to remember to not de motivate my team mates and therefore avoid using harsh tone and stay calm when dealing with them. My leadership weaknesses involve my inability to be rigid when required. My team mates often take me for granted due to my extremely flexible nature. Moreover, my negative attitude and outlook reduces my leadership potential. It prevents me from handling stressful situations effectively and managing team through these situations. This hinders my ability to look at possible solutions. Furthermore, my highly demanding nature may put constant pressure on myself and my team mates making them stressful and unable to deliver according to expectations. In order to build on my strengths a certain plan needs to be followed. The existing strengths need to be capitalized in order to make up for the weaknesses. My ability to resolve conflicts can become very useful in gaining ideas and opinions. My team mates can be allowed to openly discuss and criticize the ideas presented. This will ensure that the idea implemented is the best possible alternative. My involvement with team member can also prove to be beneficial for the team. This is because I am always aware of what task each member is performing and hence I can detect and correct errors in time. This will not only deliver the objectives in time but also result in cost saving. The sharing of information with all the team members gives them the confidence that they play an important role in the team. It also inculcates in them a sense of responsibility towards the team and also gives them a certain level of autonomy since information sharing allows them to make decisions. On the other hand, besides utilizing my strengths I also need to correct my weaknesses in order to enhance leadership skills. First I need to inculcate the habit of saying ‘No’ to team members when necessary. It is important for them to realize that there are certain rules and practices to be followed and in order for them to work accordingly, I need to communicate to them that not everything can be done according to their convenience. Furthermore, I need to think positively. As a leader it is essential that I handle difficult situations calmly and to do so I have to look at the positive side of everything. My team members look up to me for solutions in times of difficulty, therefore I have to maintain a positive perspective. Moreover, my highly demanding nature needs to be customized according to my team members’ abilities and skills. I need to understand what they can deliver in their capacity. Expectations need to be realistic and communicated to them so that they can set achievable goals. According to Fiedler’s Cognitive Resource Theory, stress has a negative impact on a situation but experience and knowledge can reduce the impact of stress on the leader (Robbins Judge, 2008).   Therefore it is necessary that I as a leader continue to expand my experience and knowledge base to avoid falling into stressful situations that can hamper the quality of the team’s work. At present my leadership lacks proper focus and direction. As a leader, I am unable to clearly set my target. However I want to become much more goal oriented as a leader. This is one of the major gaps between my current leadership and what I want to become in future. Also as a leader, my listening skills are not so effective. My impatience hinders my ability to pay full attention to what my team members say. I am quick to give my response without letting them apprise me of their views. I would like to become a leader who is creative and can continuously inspire and motivate team mates to do something new. This dynamism is what I would like to incorporate in my leadership style. Furthermore I would to inculcate in myself the ability to accept my mistakes to ensure credibility. I would want to make sure that I am not so pushy when it comes to making members work. Knowing the difference between too much work and the required amount of work is the ability that I would want to inculcate as a leader. Instead of being authoritative and demanding all the time, I would want to be more considerate and appealing. A successful leader does not only need to involve his brain in his work but his heart and soul to ensure the team is delivering (Gallos, 2008). In addition, I also want to be able to motivate my team so that they remain interested in their work. At present, I lack the skill to maintain my team’s enthusiasm. Therefore in order to be a successful leader, the gaps between the leader I am and the leader I want to be need to be closed. Firstly in order to remain focused, what needs to be done is to set a goal and then study the process required to achieve that goal. Every task needs to be subdivided to make it simpler and understandable to the team members. Next I need to improve my listening skills. It is important to make the team members realize that they are being heard and their ideas being considered. Only then will they continue to effectively participate in decision making. In order to do this, I first need to stay alert in posture and facial expression (Credit Research Foundation). Second, I have to try to avoid distraction in order to pay attention to what my team is saying. Participation from both the leader and the team in decision making is critical to leadership success therefore participative decision making should be welcomed (Nahavandi, 2008). Furthermore, to keep my team interested and passionate about a certain project, I need to remain creative. I need to be able to welcome new ways of doing the old job. I also have to learn to take risks so that as a team, we can come across new ideas making our work highly productive. It is important for a leader to welcome changes (Yukl, 1981). The main idea behind this is to discourage team members from fearing to make mistakes because only through risk and mistakes will the team learn and it is the responsibility of the leader to ensure that his team learns while performing. Also, I have to understand the capacity of each individual in my team. It is necessary that I know who is strong in what area and therefore allow each member to enhance his particular skill by working on a task he is good at. Moreover, to keep my team motivated I have to give them challenging work to allow them to grow (Credit Research Foundation). Positive reinforcement through compliments and recognition greatly enhances their morale. Recognizing an individual’s accomplishments stimulates in them a positive attitude towards their leader and their job. In order to prevent my team from taking advantage of my flexibility, I have to constantly remind them of the rules that need to be followed and also develop a habit of strictly dealing with them when necessary. In case of misconduct, I have to talk to the individual privately rather than making things worse by insulting him amidst other team members. Individual empowerment is another action element that can fulfill the gaps between the leader I am and the leader I would like to be. Empowerment refers to an individual’s complete control over his task. He needs to complete his assignment within a certain period and is accountable to the leader. However, how he accomplishes his task is for him to decide. This self autonomy gives an individual the confidence to take risks and decisions based on his own experience and abilities. It takes time to build an effective team under strong and successful leadership. Consequently it becomes a leader’s job to implement each action item at regular intervals to enhance his leadership effectiveness and the team’s productivity. Goal setting is the first action item in the leadership plan. As soon as a task is assigned, the leader should set a goal and prioritize the work. Goal setting is a major milestone and therefore careful attention should be given while defining goals and designing work break down structure. The time required for this action item may vary from project to project. Nonetheless, since it plays a pivotal role, at least two weeks should be devoted to goal setting. Next I need to alter my personal characteristics. Leadership is not only about changing the way others should work but also changing oneself to prove to be influential (Clawson, 2005).   Another week is required for me to train myself to maintain a strict aura so that team members are fully aware of their liberties. Individual empowerment requires another two weeks as it takes time to understand if members are capable of taking decisions on their own without constant guidance. Furthermore, I may also allocate another week to improve my listening skills while getting know my team mates. This week will allow me to understand their background and previous work experience. Positive reinforcement through constant feedback, involvement, monetary and non-monetary rewards is implemented throughout the time period during which a task is being accomplished. Also, it is during the process that the leader should search and explore to find out ways of motivating the team. Specific programs such as team involvement programs that allow the members to give in their feedback on concerned issues are introduced at constant intervals throughout the learning process. Therefore there is not specific deadline allocated to this action item aimed at improving leadership effectiveness. It is essential to realize there can be no specific deadline for each action item and that most of these activities are carried out simultaneously and hence one activity may be overlapping the other during a certain time period. A successful or effective leadership strategy therefore integrates a leader’s personal characteristics with his ability to adapt to his team’s requirements. A leadership strategy is successful only when it is received positively by the team and the team is influenced to work towards the achievement of the goal or objectives. Moreover, a leadership strategy is successful not only when the objectives are achieved but also when the output is of the highest quality and both the team and leader are satisfied with the end result.    References Clawson, J.G. (2005) Level Three Leadership 3 rd Edn. Prentice Hall. Credit Research Foundation. (n.d.).Improving Your Leadership Skills .Retrieved on July 22, 2008 from http://www.crfonline.org/orc/ca/ca-2.html.    ETD (n.d.). Leadership Effectiveness Model (n.d.). Retrieved on July 21, 2008 from http://www.ldi.umd.edu/LDIpages/model.htm Gallos, J.V. (2008) Business Leadership: A Jossey-Bass Reader (The Jossey-Bass Business and Management Reader Series). 2 nd Edn, Jossey-Bass. Nahavandi, A. (2008) Art and Science of Leadership. 5th Edn, Prentice Hall. Robbins, S.P. Judge, T.A.(2008). Organizational Behavior. 13th Edn. Tichy, N.M. Devana, M.A. (1997) Transformational Leader.2 nd Edn, Wiley. Yukl, G.A. (1981). Leadership in Organizations 1st Edn. Prentice Hall.

DDC Technologies for Energy Management

DDC Technologies for Energy Management Introduction Ever since the energy crisis, when digital controls (then called EMCS for energy management and control systems) were unceremoniously ushered into widespread use for HVAC control, the industry has tried to make them look and act like the pneumatic controls they have superseded. Only occasionally are some of the profoundly expanded opportunities available with digital controls applied effectively. Furthermore, terms like reset schedule and direct acting, relevant only to pneumatic systems, are still commonly employed in what is now the digital controls era. While the process of transition to digital control technologies tolerates this mixed bag, a multitude of new demands are requiring our industry to move ahead and realize the full potential of digital control technologies. Building occupants are demanding more comfortable and higher quality environments. Building owners continue to press for greater economies in construction, operation, and maintenance. Finally, a variety of pressures are upon us to provide more precise control and documentation that standards for temperature, ventilation, and indoor air quality are being met. In this article, I will discuss how DDC technologies permit a new flexibility in the traditional rules concerning the need for linear signals and responses with input and output devices. When properly applied, this new flexibility can reduce the cost of DDC technologies. Next month, I will show how, by combining these fundamentals with emerging inter manufacturer controls integration, designers can achieve new horizons in performance and energy efficiency. HVAC Control System A HVAC control system is a computerized system for climate control in buildings. HVAC stands for humidity, ventilation , air-conditioning. Often, these integrate fire, security, and lighting controls into one system. These systems typically use one or more central controllers to command and monitor the remote terminal unit controllers, and they communicate with one or more personal computers that are used as the operator interface. These control systems are typically used on large commercial and industrial buildings to allow central control of many HVAC units around the building(s). The latest systems use the building ethernet for communications between central controllers, and allow operator access from a web browser. Direct Digital Control Central controllers and most terminal unit controllers are programmable, meaning the direct digital control program code may be customized for the intended use. The program features include time schedules, setpoints, controllers, logic, timers, trend logs, and alarms. The unit controllers typically have analog and digital inputs, that allow measurement of the variable (temperature, humidity, or pressure) and analog and digital outputs for control of the medium (hot/cold water and/or steam). Digital inputs are typically (dry) contacts from a control device, and analog inputs are typically a voltage or current measurement from a variable (temperature, humidity, velocity, or pressure) sensing device. Digital outputs are typically relay contacts used to start and stop equipment, and analog outputs are typically voltage or current signals to control the movement of the medium (air/water/steam) control devices.(Valves/dampers/motor speed) It was only natural that the first HVAC controllers would be pneumatic, as the engineers understood fluid control. Thus mechanical engineers could use their experience with the properties of steam and air to control the flow of heated or cooled air. To this day, there is pneumatic HVAC equipment in operation, which can be a century old, in some buildings, such as schools and offices. After the control of air flow and temperature was standardized, the use of electromechanical relays in ladder logic, to switch dampers became standardized. Eventually, the relays became electronic switches, as transistors eventually could handle greater current loads. By 1985, pneumatic control could no longer compete with this new technology. By the year 2000, computerized controllers were common. Today, some of these controllers can even be accessed by web browsers, which need no longer be in the same building as the HVAC equipment. This allows some economies of scale, as a single operations center can easily monitor thousands of buildings. Why Linear Devices? When pneumatic controls dominated our industry, building owners paid a high price for modulati n g l o o p p e r for m a n c e and stability. One of the prices paid was the requirement that input and output devices be linear with respect to the system variable they sensed or controlled. This need for linear response was essential to match the limited control capabilities of pneumatic controllers. A number of rules and conventions were established within our industry that made achieving this linear response requirement easier. Among these were the development of the equal percentage valve, which included the seemingly backwards rule of thumb that called for sizing control valves smaller than the pipe size. Similarly, mechanical sensing devices were constructed to provide linear change in control air pressure over their entire sensing range. While these conventions and rules of thumb served the days of pneumatics, they now need to be rethought. Requiring what I call external linearization in digital control designs adds costs in two ways. Linear devices are often more expensive than nonlinear devices that may offer improved levels of performance in DDC applications. Further, linear output conventions, such as designing a high pressure drop through valves or dampers, carry a substantial continuous operating energy penalty. By developing new rules and conventions, the knowledgeable designer can produce designs that have lower first and operating costs and may operate more reliably as well. Linear Devices in the DDC Era The need for linear response in modulating control loops has not been eliminated by the introduction of digital controls. While digital controls offer improved modulating control capabilities, including proportional/integral/derivative (PID) controllers, these control loops continue to be based on the principle of linear response, at least over certain ranges. However, in most typical applications, digital controls can easily internally linearize both input signals and output control functions. Internal Linearization of Inputs One way to reduce the cost of some DDC configurations is to permit nonlinear input devices and use the DDC system for scaling to achieve the correct reading over the range required for the application. I continue to see DDC specifications that limit the selection of input devices to those that provide a linear signal to the DDC system over a wide range of values. Except in special cases, this is an unnecessary requirement that adds costs and may cause other problems. Consider temperature sensors. Fig. 1 shows a resistance curve for an inexpensive thermistor type temperature sensor that may be employed for room temperature sensing. Thermistors are excellent choices for HVAC applications. They are inexpensive, have excellent accuracy and very low hysteresis, and respond quickly to temperature changes. Furthermore, at temperatures normally involved in HVAC applications, thermistors have excellent long-term stability (some care should be taken in choosing thermistors when temperature may rise above 240 F). Finally, because thermistors are typically high resistance (10,000 ohms is typical), they are not affected by variations in wiring distances. However, some designers continue to exclude thermistors because the input signal is not linear with temperature over wide temperature ranges. Instead, low impedance RTD type sensors are often specified. This type of sensor typically requires an electric circuit at the sensor that linearizes and transmits the signal in a way that it will not be affected by wiring resistance (usually a current loop signal is used). Employing low resistance RTD sensors with additional electronics presents a number of potential problems in DDC applications. First is the matter of accuracy. While the RTD sensors themselves provide excellent accuracy, it is not uncommon to find end-toend accuracies (I use end-to-end as the comparison of the value read by a precision thermometer at the device compared with the actual reading at the DDC system operators terminal) out of tolerance. Calibration of the current loop input may be more difficult than that of a simple resistance type thermistor. Other potential problems with RTDs range from the additional electronics (usually located at the device) that may complicate reliability issues all the way to how the Sensor curve 2 Nonlinear sensor resistance curve. The sensor performance curve is a smooth curve over the sensors operating pressure. The DDC linearized curve is a series of straight lines that closely approximates the sensors performance sensor and electronics are configured, which on occasion has been found to affect adversely the sensor signal. Table functions that are now readily available with DDC products can be employed to scale thermistors and other nonlinear devices over a wide range of values. Fig. 2 shows how a DDC system can linearize a continuous, nonlinear sensor input curve with a table function. A number of straight line curves are established in the table function to approximate closely the nonlinear function of the device. As long as simple, inexpensive devices can meet the repeatability, hysteresis, and stability requirements for an HVAC application, such devices should not be rejected because their signals are not linear. Requirement of Linear Output Once it is understood that input devices need not be linear, it is not a great leap to recognize that the response from output devices controlled by analog outputs similarly need not be linear. However, the issues here are more complex and more ingrained in the rules of thumb that engineers frequently apply automatically, so some indepth discussion is required. Because of the pneumatic background, valve design manuals commonly stress the need to select coil/valve combinations for which equal increments in valve position will effect equal increments in heat transfer of a typical heating or cooling coil throughout the stroke of the valve actuator. Fig. 3 shows how traditional design practice seeks to linearize the overall performance of valve and cooling coil. Carefully selecting a coil and valve combination can provide nearly linear performance over the entire range of load possibilities. Such selection is done because it is assumed that the valve will be operated by a controller with a fixed proportional gain. Though this design principle is still widely employed, it is no longer applicable in many modern HVAC applications. In VAV cooling coil applications, the variations of air flow and air/chilled water temperature characteristics act to change dynamically the heat transfer characteristics of the valve/coil arrangement as these parameters change. This makes it very difficult to select a valve/coil combination that will be linear through the variety of conditions that may accompany its operation. The higher performance of DDC systems permits designers much greater flexibility in the design of modulating controls without establishing static (and therefore unrealistic) design criteria. Fig. 4 shows a valve and coil combination that does not provide a linear response of valve position to coil capacity. However, modern DDC systems permit scaling tables to be applied to analog outputs as well as the inputs. Output scaling permits an inherently nonlinear device combination to respond in a linear fashion to signals from the DDC system. In this example, the valve and coil combination provides about 70 percent of the design cooling capacity at about 20 percent valve travel. The DDC output to the valve can be adjusted with the scaling table to position the valve at 20 percent travel at a 70 percent output signal from the DDC system. The scaling factor allows standard PID control to operate the valve effectively because of a software linearization of the valve/coil combination. However, the chilled water flow and heat transfer performance assumed for Fig. 4 is valid only for constant load-side flows and inlet temperatures and for constant chilled water supply temperatures. Whether inherent in the system design or for optimization reasons, rarely in real HVAC applications do these other variables remain constant as control loops operate. As previously discussed, the issue of linear output combinations has therefore been only weakly resolved in the past by attempting to linearize components at one set of system conditions. Obtaining good control over wide ranges of system conditions can be resolved far more completely and effectively with the higher performance capabilities of DDC systems. The proportional, integral, and derivative gains can be tied to algorithms that adjust their values as the variables such as load-side flow, temperatures, and chilled water temperature change. Even more impressive is the emergence of self-tuning controllers. These controllers continually re-establish the various gains associated with a control loop to provide continuously precise control without hunting. The benefits of self-tuning are especially important because variables beyond the immediate control loop can have profound and widely varying effects on each control loop. Self-tuning features are becoming widely available with DDC systems and are enormously effective in adjusting control loops to continue stable operation as other system variables change. Controllability As previously discussed, selecting equipment for linear response should not be an overriding consideration for designers in this era of digital controls. However, this does not mean designers can be imprecise in their designs or in the selection of control loop components. The issue of controllability is one that will continue to play a prominent role both in the design of systems and the selection of individual components. Controllability remains largely a sizing issue. If a valve is oversized for given conditions such that the smallest increment possible from the control loop will substantially overshoot the desired control conditions, the loop has become uncontrollable. This is a problem that typically emerges during periods of low load. Fully understanding the issue of controllability and applying DDC capabilities correctly allows designers to solve such problems and at the same time vastly improve the efficiency and performance of these systems. Selecting a control valve with a lower pressure drop will reduce the pumping power required to meet the load conditions. Traditional practice strongly condemns the idea of employing large valves with lower pressure drops because of the nonlinear response and the lack of controllability at low loads. Fig. 5 illustrates the dilemma. The valve/coil combination with Valve A may be selected according to traditional design practice because it is reasonably controllable at low loads. The vertical axis intercept represents the smallest incremental cooling transfer possible as the valve is cracked open. Note that it is small-only about 10 percent of the design maximum cooling rate. The coil combination with Valve B has a much lower pressure drop because Valve B is a larger size valve. While valve/coil Combination B would require less pumping power, the Y-axis intercept is much higher than that for Combination A. Traditional design criteria typically declare Valve B unsuitable for the application because it is uncontrollable at lower loads and the valve position/ cooling capacity relationship is nonlinear. But when it is integrated with a high-performance control system that can adjust both the chilled water temperature and the loop head pressure, will linearity and controllability of Combination B really be a problem? System Dynamics To see how this question can be answered, consider the graphs in Figs. 6 and 7. Fig. 6 shows the operation curves for valve/coil Combination B at a number of different approach (chilled water supply less air temperature leaving coil) temperature conditions. It is clear that increasing the chilled water temperature relative to the leaving air temperature markedly improves the controllability at low loads. Similarly, Fig. 7 illustrates that the decrease in pressure across the valve/coil combination also improves the controllability at low loads. Designers can use these relationships to reduce substantially the problem of controllability. At periods of uniform low loads, the DDC system can reduce the head pressure across a valve and increase the chilled water temperature to improve controllability. If all valves on a common chilled water loop experience similar decreases in load concurrently, as is typical in many HVAC applications, this parameter adjustment is a great help in improving controllability at low loads. It is apparent from the two figures that larger rangeability and low load controllability are achieved by controlling the chilled water temperature for load adjustment. Raising the chilled water temperature provides a bonus of chiller efficiency increases, but chilled water adjustment reduces pumping savings because a higher chilled water temperature increases the water flow necessary to meet loads. Additionally, under certain circumstances dehumidification requirements may limit the permissible chilled water adjustment. Exploiting the integrated control capabilities of DDC systems and controlling chilled water temperature and hydronic loop pressure in coordination with the control valves allows valve/coil Combination B to perform very well in many HVAC applications. Next month we will focus on the level of integration required to make valve/coil Configuration B operate effectively. We will discuss integrating the operation of the various equipment involved in providing comfort, possible now through the industry moves to provide communication bridges among manufacturers. By concentrating on selecting the most costeffective input/output devices and by utilizing the emerging communications pathways between equipment from various suppliers, we will see that new horizons of performance and energy efficiency can be attained with simple and economical controls configurations. Designers must exploit the benefits of higher performing DDC systems to develop an understanding of the fundamentals of interfacing hardware points to DDC systems. In so doing, a more in-depth look into total system operation must be evaluated before solutions are selected. Simply following traditional rules of thumb regarding linear input and output devices is a poor design practice in this digital controls era. DDC and Small and Medium Size Buildings The control of heating, ventilating and air-conditioning (HVAC) systems is changing as a result of applying direct digital control (DDC) techniques to HVAC control. This report outlines the main features of DDC compared with conventional pneumatic control and shows that, for small-to-medium-size buildings, the DDC system can pay for itself within two years, after which it affects net savings over pneumatic systems. Comparison between Pneumatic Control and DDC Direct digital control of HVAC systems is the direct monitoring of every system input (temperature, flow, pressure) and direct control of every system output (position, onlaff) from a central controller which is a single computer or combination of computers. DDC is a simple concept, but its significance is not obvious until it is compared with traditional forms of HVAC control. Traditionally, the control of HVAC systems was based on independent pneumatic controllers, which used compressed air t o operate the dampers and valve actuators t o control space condition such as temperature, humidity and fresh-air circulation. One building would have several such systems, which were controlled independently. For example, an air-handling system composed of two fans, three dampers and three valves (Figure 1) would be controlled by local pneumatic controllers which operated as independent units. Each controller had a simple task: to maintain a constant set point (for example, supply air temperature) by monitoring and controlling a very l i m i t e d number of variables connected to it by means of compressed air lines whose pressures represented the values of the variables. The control was adjusted mechanically by a technician in the field, and, as calibration of the pneumatic components was rarely carried out, these systems often did not control the building efficient ly. Because the pneumatic controllers were purely electromechanical devices, their sophistication and accuracy of control were extremely limited. A later variant (of pneumatic control) also employed pneumatic centrals, but w i t h the addition of a computer system. This computes system monitored some additional points (for example, space temperatures) and either calculated new set points for each pneumatic controller or allowed an operator at a computer terminal to transmit manual set points to the pneumatic controllers. Although this newer variant aided the building manager by providing more information about building conditions and performance, overall effective control of the building was still compromised by the local pneumatic controllers. Each controlled point was still operated by a pneumatic controller with very limited sophistication and virtually no flexibility. These limitations became more important as ways to manage energy became more sophisticated, Some WAC system, such as variable air volume (VAV) systems, required an accuracy of control not attainable in most cases by pneumatic controllers. As a result, building energy managers were frustrated by their inability to improve the control strategies without rebuilding the pneumatic control system for each change. DDC has solved both problems;. Instead of independent local pneumatic controllers, DDC uses control or monitoring points, each connected to a computer (or interconnected computers) which reads the value of each input and transmits commands to each output (Figure 2). The control strategies are implemented by computer programs, which can be changed by the operator at will. Also, each strategy has available to it the value of every system input instead of a very l i m i t e d local set. In short, under the DDC concept, the entire building operates as one integrated system rather than as independent srrrall systems. Four main results accrue: Control can be as simple or sophisticated as desired, and can be changed easily; The system is more reliable because fewer electromechanical components are needed; Control is more accurate because of the inherent greater accuracy of DDC electronic components; and Energy is saved because an overall strategy eliminates energy waste resulting from simultaneous heating and cooling, which usually occurs in pneumatic systems. The ability of DDC to accommodate virtually any control strategy has had a dramatic impact on mechanical design. Some new mechanical systems can operate in many different modes, depending on external conditions, space temperatures, season, condition of storage tanks, and utility-pricing structures. DDC allows such systems to be operated continuously in their optimum modes, a standard which simply cannot be attained by ordinary pneumatic systems or even pneumatic systems with computer monitoring. Consequently, mechanical designers are now free to d e s i g n the best energy system for a particular building with the assurance that whatever control strategies they specify can be carried out. Each loop at the remote processors can activate itself independent of the others; however, the most efficient use of energy is achieved by controlling all the loops through the central processor. Scheduling air-conditioning and heating loads and selectively dropping electrical loads if the total building power approaches the demand limit are two common energy optimization features available. Other features, such as optimal stop/start, which calculates the optimum starting and stopping times of heating/cooling units to prepare spaces for occupancy without wasting energy, are also used as part of an over-all strategy. Most of these optimization routines do not require any additional hardware since they are implemented by simply adding programs that sense existing inputs and change the strategy for controlling existing output actuators. The building owner or manager who uses DDC effectively needs feedback to evaluate his strategies for optimizing building performance. DDC simplifies this process because it continually monitors each input directly and has storage capacity to keep files of the historical data thus obtained. These historical data can be plotted in color on a TV screen or summarized and printed in report format for management review. The most advanced DDC systems (Figure 3) include a generalized report generator which can produce nee types of reports at any time rather than limit the user to the reports engaged when the system was procured* This feature of DDC i s particularly important since the owners power to change his energy strategy generally creates a need for new reports on energy-sensitive areas identified by continued use of the system. An ancillary benefit is the ability of the DDG system to include facilities other than WAC. With little increase in cost, factors such as control of security and lighting can be added to the system, thereby enabling greater energy savings and eliminating the need to purchase separate systems for badge reading and door-lock control. There is no doubt that DDC offers more effective energy management than conventional controls but, until very recently, its application to HVAC installations has been limited to large building complexes. Many small- and medium size building installations do not use DDC mainly because of its high cost. In the following sections a typical small building is analyzed and DDC is compared with pneumatic control on a cost and payback basis. Small Building Systems The cost of an HVAC controls Installation is generally related to the number of points t o be monitored or controlled, where each point is defined as an analog or digital input (e.g., temperature sensor, fan status switch) or analog or digital output (e.g. damper position or pump on/off control. Each building system, such as air handling, domestic hot water, or chilled water, includes a certain number of points. A recent study which included detailed analysis of a series of building HVAC system, showed that a small- to medium-size building of about 37,175 m2 (400,000 sq. ft .) would contain about 180 points, of which 35% would be analog inputs, 19% analog outputs, 25% digital inputs and 21% digital outputs. Although different building configurations and mechanical designs would affect the distribution of point types, the total number of points for a building of this size would usually be close to 180. Designing a DDC System Given the building layout and the number of points in HVAC equipment, the single greatest design trade-off is that between centralization and distribution of computer power. At the fully centralized extreme a single central computer controls all functions directly and all points are wired to it. At the other extreme (fully distributed), a smaller central computer is connected t o a myriad of other small computers, each of which is wired to 10 to 20 nearby points, In this second instance the central machine presides aver the whole system and controls the points through the intermediary of the remote processors. Each remote processor can control a single HVAC system (e.g. air-handling unit, chiller) independently. A median approach is to employ a moderate number of remote units each of which is wired to 50 t o 120 points. Although all these approaches utilize the benefits of DDC, the three levels of centralization/distribution involve three factors that must be weighed against one another. The first factor is the cost of computer hardware. The fully-centralized approach employs a single processor, which is the least expensive since it combines all the computing power in one place w i t h one enclosure and no duplication of functions. The fully-distributed approach requires the heaviest capital cost for computer hardware. The second factor is electrical installation cost. The fully distributed arrangement yields the lowest installation cost because each remote processor can be located very close to its points and thus wiring runs are short. The fully-centralized arrangement may be quite expensive unless all points are in one mechanical room. The median arrangement (Figure 4) may be the most economical over-all because four remote processors can be used, one in a penthouse, one in some other logical location such as a basement mechanical room, and others on various floors of the building. The third factor is reliability. The fully-centralized scheme is most sensitive to failure since failure of the single computer causes the entire system to fail. Although the system can be made to fail safely, a system failure is inconvenient. The fully-distributed scheme is least sensitive since any component computer can fail while still leaving all the others running, but, as previously mentioned, the cost of the computing equipment is highest. A median approach for small buildings makes good sense; a compromise on all factors is established by designing a system consisting of a central computer and four remote units. Cost Analysis: DDC versus Pneumatic Control The installed cost of DDC systems has traditionally been higher than for pneumatic sys tens, especially in small installations, where the cost of the DDC control processor is spread over fewer points. The cost of a pneumatic system tends to rise linearly with the number of points, as a large system requires more independent local controllers, whereas with DDC a central processor is required even for system with very few points. However, the rapidly falling cost of computing hardware has eroded the historical price difference between DDC and pneumatic installations. For a specific building of 37,175 m2 (400,000 sq. ft.), the installed cost of a pneumatic system is about 75% of the cost of a DDC system Although the initial cost of a DDC system is higher than for a pneumatic system, it can be recovered in a surprisingly short time . It is realistic to assume that a DDC system will yield a 10X% energy saving over and above conventional pneumatic control, due simply to its more accurate a nd sophisticated control, and t o its ability to provide the building owner with information about building performance and areas where energy should be better controlled. Features such as load shed and flexible scheduling alone will produce large energy savings, and these savings will increase as the owner becomes more familiar with the operation of the building. If we assume yearly maintenance costs of $12,000 and $10,000 for the DDC and pneumatic systems respectively, and an energy usage of 322 equivalent kWh/m2/yr. (30 kWh/sq.ft./yr.) at $0.0275 per kWh for both systems, it will take 1.4 years more for the DDC to pay for itself than it will for the pneumatic system when used in the building under consideration. After that time the DDC system will save money compared with the pneumatic controls. Another simple calculation shows that for a three-year payback the DDC energy saving need be only 5.7%, an e

planet Of The Apes :: essays research papers

"Planet of the Apes" James Burroughs is a critic. In his article, "The Fiction of Science Fiction," he expresses his opinion that the movie, "Planet of the Apes," has no value or real meaning for society today. He says it is like other similar science fiction movies made in the 1960s because it is so out-of-date. He seems to feel the only people that would enjoy "Planet of the Apes" are people who have nothing better to do. I disagree with Mr. Burroughs. In the movie, "Planet of the Apes," humans did not possess language, and as a result were dominated by apes. The significance of language is the main reason I do not agree with Mr. Burroughs. Imagine the world if humans did not have language. Life would not be as we know it today. Consider how valuable language would have been to the mutes in the movie. When they were being chased and whipped like animals, would they not have been able to plot an escape to avoid capture and imprisonment by the apes if they had been able to communicate? Yes, they would have been free to live as equals. The apes and the humans would have been co-inhabitants of the earth rather than creatues in a superior- inferior relationship. "Planet of the Apes" is a perfect example of why language is so important. Another reason I am disputing Mr. Burrough's opinion of this movie is its strong message concerning how humans were treated by apes. When we watched "Planet of the Apes," we cannot fail to notice the mutes are treated. They were beaten, battered and bruised; they were attacked and assaulted; worst of all, they were degraded, disgraced and caged like animals. This is not how humans or animals should be treated. Animals should be revered and respected, for we are all God's creatures. Finally, I disagree with Mr. Burroughs because this movie made us think about how we may be destined for self-destruction. "Planet of the Apes" has a valuable message concerning our fate. Remember when the flower was found by the astronauts as the first sign of life on the "new" planet? Picture the "museum" and the talking human doll found in the cave. The Statue of Liberty scene had a planet Of The Apes :: essays research papers "Planet of the Apes" James Burroughs is a critic. In his article, "The Fiction of Science Fiction," he expresses his opinion that the movie, "Planet of the Apes," has no value or real meaning for society today. He says it is like other similar science fiction movies made in the 1960s because it is so out-of-date. He seems to feel the only people that would enjoy "Planet of the Apes" are people who have nothing better to do. I disagree with Mr. Burroughs. In the movie, "Planet of the Apes," humans did not possess language, and as a result were dominated by apes. The significance of language is the main reason I do not agree with Mr. Burroughs. Imagine the world if humans did not have language. Life would not be as we know it today. Consider how valuable language would have been to the mutes in the movie. When they were being chased and whipped like animals, would they not have been able to plot an escape to avoid capture and imprisonment by the apes if they had been able to communicate? Yes, they would have been free to live as equals. The apes and the humans would have been co-inhabitants of the earth rather than creatues in a superior- inferior relationship. "Planet of the Apes" is a perfect example of why language is so important. Another reason I am disputing Mr. Burrough's opinion of this movie is its strong message concerning how humans were treated by apes. When we watched "Planet of the Apes," we cannot fail to notice the mutes are treated. They were beaten, battered and bruised; they were attacked and assaulted; worst of all, they were degraded, disgraced and caged like animals. This is not how humans or animals should be treated. Animals should be revered and respected, for we are all God's creatures. Finally, I disagree with Mr. Burroughs because this movie made us think about how we may be destined for self-destruction. "Planet of the Apes" has a valuable message concerning our fate. Remember when the flower was found by the astronauts as the first sign of life on the "new" planet? Picture the "museum" and the talking human doll found in the cave. The Statue of Liberty scene had a

Social Discrimination Essay -- Sociology

During the Spring of 2012, The University of Southern Mississippi's basketball team made their first appearance at the NCAA tournament since 1991. The team played against Kansas State University in Pittsburgh, Pennsylvania. During the second half of the game, Kansas State was defeating the University of Southern Mississippi, due to their freshman point guard Angel Rodriguez who contributed many points. The Wildcats were leading the game by 70-64. As Angel Rodriguez was performing a free throw, some University of Southern Mississippi prep band students chanted â€Å"Where's your green card?† This incident made national news and labeled the band students of the University of Southern Mississippi as ignorant, immature, and racist. The intense of emotions towards Southern Miss' chance to continue having a position in the tournament struck the band members to resort discrimination against Rodriguez by using derogatory language. There are different stances that can take place when evaluating an incident such as this one. The University of Southern Mississippi is located in the Southern region of the United States which has an infamous reputation for racial discrimination and division for several years. When this is looked at by people from other regions of the United States, they will assume that the band members were racist. Angel Rodriguez is from Puerto Rico, an island in the northeastern Carribean. The majority of Puerto Rico's population consists of Hispanics and Latinos. Puerto Rico is not a U.S. State rather it is a commonwealth of the United States of America. This gives Puerto Ricans the benefits of having a United States citizenship; therefore not requiring them to have a green card to be in the United States of America. A gree... ...ed the boundary of the band student's perceived territory in the United States because of his ethnic background. Southern Miss' prep band has members of minority backgrounds. If the minorities also participated in the taunting, it shows that geography and racial discrimination is instilled in all races that are citizens of the United States. Rodriguez lives and attended school in Miami, Florida and for the band to question his citizenship status shows how racial divisiveness occurs even within the close knit regions of the United States. Miami, Florida is known for a large and thriving Spanish speaking population in the United States. Works Cited Williams, Melvin D. 2003. Racism: The Production, Reproduction, and Obsolescence of Social Inferiority. In New directions, ed. Carol R. Ember, Melvin Ember, and Peter N. Peregrine. Saddle River, NJ: Prentice Hall.

War Criminals

â€Å" War Criminals are still in this country just because of political unrest and corruption† ‘The flag of independent Bangladesh flies at the front side of the car of war criminals (? ) of 1971.. ‘(Manik 2008). It’s the most hatred truth now-a days like story or poetry to the Bangladeshis who got a huge loss of lives, properties and threat in existing their lives during and after the war only for the unexpected conspiracy of those war criminals among whom many are surprisingly involved till today in leading our country. Who’ have given them rights to rule and even impose laws on us Why are they still in this country with more than all facilities where even a freedom fighter who sacrificed his life for this country can not Theanswer of those questions is commonly known to the people now a days. Do not you also guess the greater interest for being stable in politics, the corrupted political parties allow them to live peacefully in Bangladesh?Exactly due to the political unrest and corruption, the war criminals are still here in our country whose conspiracy is not finished yet. This is the national fact for what I am going to show that the political unrest and corruption gives strong position to the war criminals to be here. Before having my stand let me clarify about the powerful war criminals of our country under whom other criminals are being hidden for years.The most marked war criminals of our bloody War of 1971 are specifically present in Bangladesh with strong handling power and voice from Jamaat e-islami along with others involved directly in forming RazakarBahini, Al-Shams, AL-Badar who heavily drawn into mass murdering, rape, arson, looting and especially killing of intellectual during the last part of our glorious liberation war. Jamatis were related with most genocide that happened during nine months of liberation warthat is proved to us from the different sources and ‘MuktiyuddhaCetanaBikasa Kendra’.As hraf Hossain, a leader of Jamaat's student wing IslamiChhatraSangha, created the Al-Badar militia in Jamalpur District on 22 April 1971 (Editorial, DailyPurbodesh, 23 April 1971). In May, 1971, Jamaat leader Mawlana Yusuf created the Razakar militia in Khulna (Editorial, Daily Sangram, 14 November 1971). As getting information from the book ‘Genocide '71, an account of the killers and collaborators’ by AhamadaSharif and MuktiyuddhaCetanaBikasa Kendra (1987) , the large group of ilitia named AL-Shams was also created at the mid of the war led byJamat leader Ali AhsanMujahid who did the same massacre during the war. However, some people say, here in Bangladesh we have a quite sustainable constitution which is representing a complete freedom of country. But in that constitution there is nothing about war criminals and their definition. Constitution of Bangladesh does not make any specific words about the existence of the war criminals. From the ISN report 4thNovember, 1972 we get the whole overview of our constitution easily.Here according to The Article-6 (1) and (2) [talks about ‘Citizenship’] ,Article-19 (1) [talks about ‘Equality of opportunity’] and Article-32 [talks about ‘Protection of right to life and personal liberty’] of the constitution, war criminals along with everyone after the war got the clear acknowledgement to be a citizen of Bangladesh. So they deserve to be with all facilities like us. Therefore the clarification of Constitution is responsible to give the opportunity to the war criminals to be still here in Bangladesh. So justonly the political interest and corruption is not thefact.Butmany Specialists and intellectuals gave different types ofopinions opposing the above logic . Ema. E. Hasana and War Crimes Facts Finding Committee (Bangladesh) in their combined and most acceptable book ever ‘Papers on genocide, war crime and crime against humanity in Bangladesh(2001) proved having many statistics and incidentsthat for political and individual soft corner, the makers of constitution who were the only political power at that time made a diplomatic composition of Constitution which had not given any specific definition for the war criminals.That is why war criminals are the citizens of Bangladesh now. Besides, for political interest they changed and amended many parts of constitution (Malik 2009). We have seen that in the elections, those political leaders use the war criminals for having privilege. Kabir (1998) said from the report of Primary Resource in International Affairs(PRIA) that three specified war criminals (Ahmed Sarwer, Kamal Azam, Ruhitbillah) were appointed in the Local administration on September, 1972.So we see the ultimate cause of staying of war criminals strongly in country is the political corruption and interest for having power. In addition, the position of the war criminals has been lastingfor years by the strong influences of the foreign coun tries. Blackburn (2008) indicates a matter thatUSA has less concentration on the illegal terrorism happened in the poor countries where they have no profit.Absolutely it’s true that to overpower the developing and underdeveloped countries like our country Bangladesh the powerful and developed countries like USA and UKdo not assist the Government of us being informed about theunfair activities of the many fundamentalist parties who always opposed the national war in the name of peace as wrong way having brutal massacre on innocent patriotic people rather they try to take advantages from the cases and if they can not make their self-interest from us then they threat us with their rich nuclear power as a complain of having fundamentalist terrorists.That is the chance for the fundamentalist war criminals of our country getting indirect influence from them and for this some of us argues that it’s not all about thepolitical corruption which is only responsible for the presen t position of the war criminals in our country. Yes it may be right and correct that the foreign influence has. But the latent history is, Bangladesh Govt. is not supposed to become an undertaker govt. Rather, to get the support from the strong foreign govt. , for holding the power and having more favour and self-interests doing corruptions within own country, our politicians lose their soveiregnity and own character.For the greater political interests they have been using the war criminals as their partner. So again the main cause is political corruption for what still the war criminals are here in Bangladesh. Moreover, the war criminals have the international networks in many countries. Jamaat-Bangladesh has the direct control under the Jamaat-Pakistan(Blackburn 2009). According to the report of Blackburn (2009), both two groups get supports including financial aids from the Islamic Circle of North America (ICNA).He found that MueenUddinChowdhury and Asrafuzzaman Khan from Jaamt-B angladesh who are involved in war crimes make funds in UK, US, Germany and Austrialia and keep it to the Al-Khidmat Foundation that helps to support the HizbulMujahideen, Jamaat's armed wing and other groups which are designated by the US and UK as a terrorist organization. Those groups have very strong supports in almost many countries of Asia. That is the weak point for Bangladesh to stop those war criminals involved with them. But we see at present we have no strong political strength where the political parties are busy with their own interests.That is why Bangladesh did not either make its enough image as stand internationally. As political parties just think about their own interest, they always hope to get assistances from the different sources as well as those groups. For that reason they do not have any bravery say against those strong networks getting money from them. The most important thing is that the unconsciousness and unwillingness of the general people who always si lently has been allowing the war criminals to freely live in peace.Besides, many of us directly support the war criminals and try to give them the power to lead the country. But we all experience that we the general people are bound to be silent under the power of corrupted political parties. It is well planned to rehabilitate the war criminals in Bangladesh. Here war criminals are given power to control politics and given the post of minister of this country. And by this, the public are cheated so that they can not remind the matter again. So frequently under the only political corruption war criminals are still existingin this country.However the key volume of the strength of war criminals increased from 1972 while they were pardoned as a ‘General Bail 1972’ by Sheikh Mujib which was said to be having a great political advantages and supports for them (Ahmed 2010). But the most favourable chance came to the war criminals during 1975, 1977, 1979 as those years when the acceptation of religion based politics started. kabir (1994) thinks that MAJOR JIA and ERSHAD tried to make the people more emotional and made them more sentimental by religion in a wrong way with the wrong explanation of Islam by the fundamentalistsJamaatis .They invitedthose war criminalsto take pure political support and they both gave chance to them to be their political partner. Going to do that they changed the constitution for the betterment of the war criminals but not more than any development. That is why they rehabilitated the war criminals. On the other hand, no step has been taken till now to make trial of the war criminals due to political interest of the the major political parties after the liberation. So many govt. leaders came and gone but not tried to trial the war criminals only for political cause.Even some of the political parties made Joint Group to win the election which is a practical example. We saw the Ameer of Jamaat-Islami had been the minister of our c ountry. Mohaiemen (2003) found that an alleged war criminal SalauddinQuaderChy. has just became Bangladesh’s nominee for Secretary General of the Organization of the Islamic Conference (OIC) with his power getting the support from the own political parties.To sum up, it’sinfact necessary to say that the war criminals are used as a great vote bank in elections which actually increases unrests among the political parties. abir (1994) realized that the supporters of the war criminals were increasing day by day by the chance of the corrupted politics. The consequence of it reflects very soon. It is impossible to determine how much support the Jamat actually had in the 2001 election as it was part of an alliance whose various members voted for each other against the Awami League, but its 17 seats in the new parliament – and two ministers in the government – suggest a dramatic increase. So it’s clear to know that just for the political unrest and corrupt ion the war criminals are existing in our country still now.