Oldham Pond study Lab Report Example | Topics and Well Written Essays - 1250 words

Oldham Pond study - Lab Report Example Data was collected from Oldham Pond which is a 235-acre natural pond located in an urban area in two towns, Pembroke and Hanson. The sources of water for the pond are a small tributary, wetlands areas and cranberry bogs of Herring Brook and drains into Furnace Pond. The pond has a 2.8-mile shoreline which includes residential houses and summer camp. It has an average depth of 10 feet while the deepest point in the pond is 15 feet. Geographically, the pond is at a latitude of 42.06701 N and 70.83644 W. The data set was collected from the SW shore, N. Haledon at an interval of three weeks; the first data being collected were collected on 4th February 2012 and the second data was collected on 25th February 2012. The study area is shown in figure 1 in the appendices page. Data collection method The data collected was on temperature, dissolved oxygen, conductivity, Ph and the total alkalinity. Moreover, the prevailing weather conditions were noted including the temperature and the wind co nditions. During the first visit, data was taken on at the surface and at a depth of one meter. In addition to the two depths where the parameters were measured from in the first visit, the second study included measurement of the parameters at the bottom of the pond. Equipment with the ability to measure Ph, conductivity, temperature and dissolved oxygen at once was used. As noted by Stephens et al (431) measuring of Ph, temperature and conductivity give the best results when carried out at the sampling point using portable equipment

Choose a topic that will go with the paper Essay

Choose a topic that will go with the paper - Essay Example (supplementing historical and sociological writings) that detail the problems of the average family trying to survive the tough times of The Great Depression; d) tales of women struggling for independence and self-expression in an America just before the Women’s Liberation Movement; or e) as tales of the woman’s necessity to submerge what she likes to do to the demands of domestic responsibility†¦ Here, we shall look at Olsen’s ‘I Stand Here Ironing’ (ISHI) from angle (a) mentioned above, as a story that explores the mother daughter relationship, and also touch upon the impact of the early experiences that a child has (in this case the daughter) on her ability to have a ‘well-adjusted’ childhood, and on the kind of adult she grows up to be. In ISHI, the Mother is the protagonist, standing there and doing something as mundane as ironing clothes. And while ironing, she looks up occasionally to speak with someone — perhaps a teacher, perhaps a counselor, who feels that she should be paying more attention to her daughter. There is no counselor really there — what we see of her is merely what is reflected in the mirror-monologue of the Mother. Olsen’s style may be far removed from the Shakespearean dramatic tradition. But it packs the punch of a Shakespearean soliloquy, albeit in a low-key manner. There is nothing ostensibly dramatic about the woman talking in snatches, going back and forth from present to past, dwelling on the various incidents of her life. In setting and story the scene is far removed from that of a Hamlet. But the self-searching is the same: â€Å"To be or not to be† says Hamlet in torment; â€Å"I will become engulfed with all I did or did not do, with what should have been and what I cannot help,†(Olsen 1-2) echoes Emily’s Mother. She feels guilt for what she did not do for her baby, but wonders whether she could really have done it differently. The Mother admits to herself that even when her daughter was a baby, she gave

Bribery and corruption in the public sector Essay

Bribery and corruption in the public sector - Essay Example These are regulations and authorizations, taxation, and spending decisions. On the whole, Mauro explained that when these direct factors are in place, people simply try to forego them as a way of fulfilling their personal gains. By so doing, they are caught in the web of bribery and corruption. A typical example of this is some who engages in bribery or other corrupt means to get a passport, a shop opened or tax invaded. Examples of indirect factors include the level of public sector wages and penalty systems. Explaining further, Pope (2000) postulated that in countries such as Sweden where pay levels are high, corrupt practices are hardly likely to happen. Tzong-Shiang and Xu also argued that passed on the classical model of crime prevention, corruption is most likely to occur when the penalty for bribery and corruption cannot be seen to be more deterring than what a person gets from indulging in the acts. Impact of supply-side and demand led corruption Like every other economic tra nsaction, corruption is also said to have a supply side and a demand side. The supply side of bribery and corruption generally refers to the favor seeker who is willing to buy money or a gift to change the normal course at which public activities and transactions must be performed. The supply side, on the other hand, refers to the public official who willingly takes a bribe or engages in the corrupt act as an abuse of power vested in him or her to offer contracts, issue license or allocate any form of a scare resource.

The Status of the P versus NP Problem Essay Example | Topics and Well Written Essays - 500 words

The Status of the P versus NP Problem - Essay Example With innovations in computational power, there has been an increase in algorithms that are much smarter than before. Under such circumstances, the pressure to tackle P versus NP problem, is considerably increasing. Moreover, this P versus NP problem is invading all fields of science as just not a theoretical question but as a basic principle. Author of the article surmises herein, the simple description of the issue and the change in working direction related to computer science attained because of efforts to solve this question. P versus NP problem actually computes combinational issues. Jack Edmonds, first in the history, provided a program that can help in developing a program to solve combination problem, and formally defined it as ‘efficient computation’. P in this problem stands for ‘Polynomial Time’ and defines problem class which has efficient solution. Likewise, NP in this problem stands for ‘Nondeterministic Polynomial-Time’ and refers to the problems that have solutions that can be verified in an efficient manner. Furthermore, author describes that extremely complicated NP problems are termed as ‘NP-complete’ problems. Examples of such problems are Clique, Partition and triangles, 3D-coloring and Hamiltonian cycle. Basically, the idea promoted by NP-complete asserts that if an efficient algorithm can be developed for one problem, it can also be developed for other complicated problems too. Thus to simplify, P defines the type or the category of the problem that comes with efficient solution whereas, NP defines a group of problems, each of which has an efficient recognizable solution. By saying P = NP, we mean to say that for any problem that has an efficient verifiable solution, we can efficiently identify that solution. However, there are many scientists who believed that P ≠  NP and defined it as inability to find the solution efficiently. The author presents several attempts to prove a problem that is

Reading Review Assignment Example | Topics and Well Written Essays - 750 words

Reading Review - Assignment Example Theses artists perceived revolutionary leftist politics as the sole hope against abuse and violence. They therefore placed hope in political art as opportunities to bring change. To communicate to masses of people, the artists organized realism, a style that most people preferred and understood (Barber 31). Some artists such as Diego Rivera used their art to protest social ills. In 1950, Rivera created an artistically huge, multi-layered mural in Mexico City. He drew his ideas from the early colonial manuscripts, Pre-Columbian sculpture, and historical accounts to compose idealistic portraits of utopian Indian traditions, on-going resistance to the dominant Spaniards, and radical assault on imperialist vices. Rivera’s use of new technologies in art was used to protest social evils and had clear appeal to leftist politics, an appeal that expanded to the U.S during the age of depression. Most of researches from art works indicate that femininity failed to fulfill most of the requirements of traditional art history. In the 19th century, these practical limitations did not affect women as much, but in the early years of the 20th century, women were gradually marginalized from paintings. Women, whose reputed powers were in intuition and emotions as opposed to reason were perceived as incapable of delivering symbolic and intellectual arts properly. History art depends on a clear creation of articulated texts, where texts are clearly employed to meet discursive objectives. Similarly, the temperaments needed of a history artist begun to be gendered as â€Å"masculine† thus implying that none of the women artists would have the frame of mind essential to create significant historical art. Since art displayed and needed judgment and imagination; a couple of components of reason, they were traditionally associated with masculinity. A notion came

Television as the Substitute Good Essay Example for Free

Television as the Substitute Good Essay Studying the conditions, it can be understood that the television set is a substitute good of the television repairmen. Meaning, if the cost of hiring repairmen goes up, the demand for television sets will rise (Piana 2005). Although this may seem counter-intuitive, it makes much more sense when the problem is closely observed. Firstly, we take only in consideration the two goods given: repairmen and television sets. It does not follow that television sets have an absolute need of repairmen for the industry to survive. When a television set breaks, hiring a repairman is not the only option. The second option is the second good itself. People have the option to simply buy a new television set. It is true that the market of repairmen is dependent on the demand for television sets but the scenario asks for the opposite. The market of television sets does not rely on the demand of repairmen. Overall, we can say that the increase of repairmen cost per hour will increase the quantity of new television sets sold. If the cost of television repairmen becomes too high, people will have the tendency to buy new sets instead of hiring repairmen. Of course, this scenario relies on the condition that other goods in the market are not considered. If we take into consideration goods that rival the television such as computers and what not, then the market for television sets may go down with the repairmen. However, the problem must be limited to the given and all other factors cannot be applied. Since television and repairmen are the only ones to be considered, then the prediction above is more or less acceptable.

Kinetic Energy Recovery System (KERS) For Vehicles

Kinetic Energy Recovery System (KERS) For Vehicles During deceleration, traditional brake of a vehicle transforms the kinetic energy into thermal energy. This is due to the fact that when brakes are applied the friction between the brakes shoe or the calliper as used in modern disc brakes and the wheel not only restricts the motion of the wheel but at the same time a lot of heat energy is generated due to this braking action. Unfortunately there is a huge waste of the generated energy in the form of heat as a large amount of it dissipates into the air. Hence in order to make use of this heat energy, the idea of kinetic energy recovery for vehicles has been explored. Although this system is in use in motorsport and other few selected high performance fields, method like using regenerative brake to generate electric energy is already used in hybrid cars. However, transforming the mechanical energy into an electrical form has a limited efficiency and is not an easy task, but requires complex mechanical systems. Working By using acceleration sensor controlled gear box, acceleration and deceleration could be performed by the transfer of mechanical energy between the vehicle and its energy storing unit, thus reduce energy consumption. The design contains three basic parts: a control unit, an infinitely continuously variable transmission gearbox and an energy storing unit. There are two possible solutions for the energy storing unit: a big torsion spring or a flywheel. Both the two solutions work with the system. THE SPRING SYSTEM: During deceleration of a train, instead of using break, the wheels are connected to a torsion spring with the help of the gearbox. This in turn transforms the kinetic energy into the springs potential energy. However, the spring does not provide constant torque, according to Hookes law. In order to perform stable deceleration, the sensor controlled gearbox changes the gear ratio through a continuously variable transmission mechanism. The desired deceleration rate is determined by the driver. The acceleration sensor senses the actual deceleration rate and gives accurate feedback. Through a feedback control loop, the gear ratio is adjusted continuously and deceleration rate can be maintained at the desired level. In cases when spring has its maximum load, normal braking is activated. When the train stops, the spring will be held. When the train starts again, instead of using its engine or motor, the gear box connects the spring to the wheels but in an opposite way to drive the train. T he acceleration torque provided by the spring decreases with the release of the spring. Again, through sensor feedback control loop, the transmission gear ratio is adjusted continuously to maintain the acceleration rate. Once the spring is fully released, the motor is again activated. THE FLYWHEEL SYSTEM: System with a flywheel works in a similar way. Energy is stored into the wheel by increasing of the spinning speed. In order to provide constant torque transmission gear ratio need to change. With the implementation of acceleration feedback control, the braking output could be adjusted through changing the transmission gear ratio. The kinetic energy could be completely (except the loss on bearings and transmission gears) stored during braking and given back during acceleration. This system could work with both combustion engines and electric motors. Thus the limited energy recourses could be saved. KERS is essentially an energy-storing flywheel attached to an efficient Continuously Variable Transmission. Under braking, energy that would usually be expended as heat is instead used to accelerate the flywheel. When needed the power can then be used to augment that of the internal combustion engine What makes the system green isnt the added performance, but the use of energy that has traditionally been wasted. Working and Specification Kinetic Energy Recovery System  (KERS) is the word which is being associated with Formula 1 cars and has been in the Headlines for quite a while. All 2010 Formula 1 cars feature KERS as an integral part after it was made mandatory by FIA to be installed and is currently being manufactured by  Flybrid Systems. What is KERS? KERS  as the name suggests is an energy recovery system also known as regenerative system but importantly the KERS is quite advanced than the conventional energy recovery systems. The mechanism functions in a way that it reduces the speed of the vehicle by converting some of its kinetic energy and/or potential energy( in case of elevations) and storing it into a useful form of energy instead of dissipating it as heat as seen in conventional dynamic braking system. Technically KERS can be defined as an Electric generation, storage, and propulsion system generating electricity during slow down or braking, storing it in batteries, and later assisting the gasoline engine by boosting acceleration with the help of electric drive motors. The device will be installed in F1 cars to save energy utilized while braking, store it and further use it when required. KERS is of two types one mechanical and the other electrical. What does KERS contains? The system basically consists of a CVT( Continuously Variable Transmission ) unit , a clutch, an epicyclic gearbox and a flywheel (The mechanical type contains a FLYWHEEL to retain power while the Electrical type contains an electric motor twinned with a BATTERY or CAPACITOR or FLYWHEEL) Working of Kinetic Energy Recovery System The engine drives the KERS system and it is coupled with the drivetrain. The drive comes into the CVT unit which effectively changes the gear ratio in accordance with the flywheel and rotates the flywheel. The control pistons seamlessly change the gear ratios between the input and the flywheel moving at a much faster rate than the actual drive (5:1 ratio at 64,000 rpm). The amount of energy stored or released depends upon the torque transfer taking place within the CVT unit, which is controlled by the position of the levers. Conclusion KERS is a particularly appealing proposition for road-going vehicles because of its lack of weight and relative simplicity over the energy storing systems in current hybrids like the Toyota Prius. KERS doesnt need batteries and is therefore free of their weight and the environmental impact that comes from creating and disposing of them. In city riding KERS would have a significant impact on emissions, providing emissions-free power for initial acceleration away from stoplights and similar. In performance applications the system could provide on-demand extra power for overtaking or accelerating hard out of corners, using power that wouldve normally been wasted as brake heat on corner entry. More power using less fuel can be easily achieved.