Environmental Pollution Essay Example for Free

Environmental Pollution Essay 1. Effects on Climate Land pollution can affect the general environment of the Earth. Land pollutions leads to loss in the forest cover of Earth. This is in turn going to affect the amount of rain. Less rains mean lesser vegetation. The effect of all different kinds of pollution will eventually lead to problems like acid rains, greenhouse effect, global warming. All of these problems have already initiated and need to be curbed before the situation runs out of control. 2. Extinction of Species One of the major causes of concern is the extinction of species. Species are pushed towards endangerment and extinction primarily by two processes. Habitat fragmentation is the fragmentation of the natural habitat of an organism; cause primarily by urban sprawl. Habitat destruction, on the other hand, is when land clearing adversely affects animals special such that their natural habitat is lost. Both the actions can cause some species to go extinct and others to become invasive. 3. Biomagnification Biomagnification is the process in which certain non-biodegradable substances go on accumulating in the food-chain (in one or more species). The most common example is of methylmercury in fish and mercury in eagles. Not only does biomagnification put the particular species at risk, it puts all the species above and below it at risk, and ultimately affects the food pyramid. 4. Effects on Biodiversity Species extinction and biomagnification is going to overthrow the balance of nature very significantly. The main reason for this is disturbance created in the food chain. To give you a very simple example on account of biomagnification of mercury in eagles, they might go extinct in the subsequent years. However, we know eagles prey on snakes. Less (or no) eagles will then result in more number of snakes! As you may have realized, land pollution is indeed going to affect a lot more things than we though it will. Hence, I leave you with some corrective measure you can take on a personal level to reduce land pollution. Encourage organic farming buy organic food. Proper garbage disposal separate your garbage before you give it to the garbage collector; and strictly say NO to plastic. Encourage recycling buy recycled products, notebooks, paper, etc. Restrict use of herbicides and pesticides they are not only used in farm, but in your own backyard as well. If we reduce our contribution to garbage and litter, therein itself we will be able to significantly reduce land pollution and probably curb it entirely in the near future. Also do realize this isnt only about land pollution; it is about all kinds of pollution. We need to take steps to prevent damaging our Earth. We have no other place to go. Read more at Buzzle: http://www.buzzle.com/articles/causes-and-effects-of-land-pollution.html

Physics of Rail Guns Essay -- physics weapon weapons rail gun

The concept of a rail gun is simple: two parallel bars connected to a power source produce an electric field. This electric field can be used to propel a projectile along the bars. If enough amperage is provided, the projectile can achieve velocities of up to 4 km/s. The U.S. Army has been interested in the potential of electromagnetic guns for quite some time. In 1988 the University of Texas Center for Electromagnetics began work on a 9 MJ range gun, which would be designed to launch 2-4 kg projectiles at velocities of up to 4 km/s. Design features of this range gun included up to 230 MJ stored energy, 6 kV and 3 MA peak output ratings, and a 9 shot repetitive fire capability. In the early 1990's, the U.S. Army, along with the Marine Corps, showed much interest in the Cannon Caliber Electromagnetic Gun System (CCEMG). This project seeks to demonstrate an elecrtomagnetic gun system designed from a system/mission prospective. The CCEMG showed a 3 times increase in energy and power density over the range gun system. The U.S. Army plans to produce electric tanks by the year 2015 with electromagnetic guns mounted on them. The all-electric tank would include electric vehicle drive and suspension and electric armaments. In this concept, the flywheel energy can be used as a flywheel battery to provide power for vehicle acceleration and regenerative braking, and will also produce electrical power for the electromagnetic armaments. This is the perfect example of how physics is still impacting the world in which we live. A rail gun in it's simplest form is a pair of conducting rails separated by a distance L and with one rail connected to the positive and one the negative side of a power source supplying voltage V and current I.... ...an use the right hand rule. Since all the angles involved are 90 degrees, the resultant force has a magnitude resulting from the simple multiplication of the magnitude of i and B and the value of L. (|F|=L|i||B|) To determine the direction, lay your right hand along the path of the current through the projectile, with your fingers pointing in the direction the current is travelling. Next, curl your fingers in the direction of the B field. Your thumb will now be pointing in the direction of the applied force. Bibliography 1. Jengel and Fatro's Rail Gun Page. http://home.insightbb.com/~jmengel4/rail/rail-intro.html 2. Pappas, John. University of Texas Center for Electromechanics http://www.utexas.edu/research/cem/ 3. MIT students. Amateur Rail Gun Production Journal http://www.railgun.org 4. United States Patent and Trademark Office http://www.uspto.gov/

Developing Good Work Habits Essay

During the early school years, students must begin to develop good work habits including preparing for schoolwork, organizing time and effort, and developing effective study skills. As students continue into middle school and high school their success depends, to a large degree, on refining and sustaining these work habits. Time management, organizational skills, and efficient study skills become especially important by this stage. Students who are able to develop and maintain good work habits are in a position to succeed – to learn what needs to be learned, and to become confident students. Getting started on assignments in school and at home requires students to engage their attentional abilities. Students must be alert to the task at hand, possibly shifting focus to a new activity, and have the mental effort necessary to initiate the task. Students who are able to preview, or think about the outcomes of a task before beginning, are helped in many ways. They can have an idea of what a report will be like once a topic is selected, what materials will be necessary to do an assignment, etc. In addition, students who have a strong sense of â€Å"step-wisdom† – knowing how tasks or activities can be broken down into a series of steps, will be able to determine the first step needed to get started on an assignment. There is an optimal rate for accomplishing most tasks. A competent student is often a well-paced student, performing at a rate appropriate to the task and available time. Taking the appropriate amount of time for a task is largely dependent upon both a student’s temporal-sequential skills and his/her attentional abilities. Temporal-sequential skills help us interpret, retain, or create information that is in serial order. These skills are related to a student’s ability to appreciate time in general and estimate time appropriately. Tempo control (a facet of attention) helps students regulate the allocation of time to the task at hand, and predict the time required for an upcoming task. Tempo control also instills a sense of â€Å"step-wisdom†, the knowledge that it is more effective to undertake activities in a series of steps, rather than all at once. Tempo control allows a student to match his/her pacing to the demands of a given task, e. g. , to take the right amount of time to finish an essay test, to do a homework assignment thoroughly yet efficiently, etc. For many students, time is their most precious resource. Making the most of the time they have enables students to be as efficient and successful as possible, leading a balanced life of work and play. A clear understanding of time is required for students to manage their own time effectively, e. g. , plan long term projects, organize schedules, etc. As such, time management skills are an important component of a student’s success – in school and beyond. In order to meet assignment deadlines and to keep up with schedules related to school and schoolwork, students must engage their temporal-sequential ordering abilities. These skills help us interpret, retain, or create information that is in a serial order. Students with strong temporal-sequential ordering skills are able to manage their schedules, organize their work, and make efficient use of their time. Such students are also able to avoid procrastination (putting off a task that must be done). For students with weak time management skills, procrastination can have painful consequences, affecting both academic and personal success. In order to complete assignments for school, students must develop their cognitive working capacity. That is, students must learn to initiate and maintain the mental effort needed to complete tasks and activities. The ability to manage one’s effort is closely linked to academic productivity and success. A strong capacity for work enables students to delay gratification and to persevere through tasks that take considerable energy. It also helps them sustain their effort when information is worthy of attention, even though not immediately exciting, such as when studying a chapter they will be tested on the next day, or reading the instructions for a science experiment. Developing good organizational behaviors can play a key role in efficient school performance. School is much easier for students who know how to organize themselves, their materials, and their work space. Having effective organizational tactics will continue to be a valuable asset throughout a student’s education and career. Being ready to learn often means being prepared for the next activity, having to shift gears from one task to another, and having all the necessary materials on hand. In order to develop this aspect of learning readiness, students must engage their attentional abilities (especially that of previewing), as well as their memory skills. Through previewing, a student is able to look ahead and be prepared to deal with upcoming circumstances, challenges, and academic tasks. For example, previewing helps students prepare for a test, get ready for an upcoming class, and smoothly transition from one activity to the ext. In addition, students who preview are able to determine which materials are needed for a task and to remember to have those materials on hand. As a result, they are better prepared for activities and better able to follow through on assignments. Staying organized for school requires a student to have strong spatial abilities as well as a strong memory. To efficiently keep track of school materials and assignments, for example, students must have an internal sense of how things should be organized. In order to follow through on school-related tasks, such as turning in homework and bringing the right books to class, students must be able to remember where these items are, as well as remember to have the items on hand when needed! Maintaining a good study space is important to every student’s success. Students must have appropriate environments in which to learn and study, both at school and at home. Setting up and keeping an organized work space requires that students have strong spatial abilities. Such abilities help a student arrange a consistent place for storing school books, organize a desk drawer, keep a desk clear of clutter, etc.

Choosing the Right Philosophy Ph.D. Program For You

Choosing a philosophy  program can be extremely difficult. In the U.S. alone, there are over 100 well-established schools granting graduate degrees (M.A., M.Phil., or Ph.D.) in philosophy. Needless to say, Canada, the U.K., Australia, France, Spain, Holland, Belgium, Germany, and several other countries have advanced degree programs that are well-regarded, too. How should you decide which program is best for you? Length of the Degree and Financial Aid One of the most important factors to consider when choosing an academic program is the length. When it comes to Ph.D. programs, U.S. departments typically require a longer period of study (between roughly four and seven years) and usually offer multi-year financial aid packages. Other countries have different systems, and in the U.K., France, Germany, and Spain, it is more common to find three-year Ph.D. programs, some of which offer financial aid. The financial aid aspect can be a decisive factor for many students. Fresh graduates of philosophy Ph.D. programs can expect to face more challenges in the job market than graduates of law school and medical school programs. Even for graduates fortunate enough to obtain an academic job after completing their degree, it can be difficult to pay off thousands of dollars in loans. For this reason, it is not recommended to begin an advanced degree in philosophy without first securing proper financial aid. Placement Record Another important characteristic of an advanced degree program is its placement record. What sorts of jobs have the graduates from the program secured over the last few years? The placement record  can be an important indicator for prospective students. Keep in mind that placement records can improve or weaken on the basis of  changes in the reputation of the faculty members of the department and, to a smaller degree, of the institution. For instance, the philosophy departments  at  New York University  and  Rutgers University  significantly transformed their reputations since the early 2000s, and in 2017 their graduates were among the most sought-after on the market. Specialty It is, however, important to choose a program that suits the interests of the prospective student. In some cases, a relatively less-known program may actually be a students best choice. For instance, for someone interested in phenomenology and religion, the  University of Louvain  in  Belgium offers an excellent program.  Ohio State University  offers a top-notch program for students interested in the philosophy of mathematics. Because Ph.D. programs take years to complete and require a great investment on the part of the student, it is important to find a school where the student can engage intellectually with other students and faculty on the subjects that most interest them. That may be, in some cases, a prestigious name-brand school. It may also be a smaller school that happens to be less prestigious. Location Enrolling in a Ph.D. program often requires relocating—to a new country, a new city, a new neighborhood. Before making this drastic change, students should consider the location of the school and ask themselves whether they believe they can thrive in that environment. A sleepy college town may be the perfect study-zone for some students. Others may be more comfortable in a crowded city. Prestigious Departments Which schools have the most prestigious philosophy departments? It depends on how you measure prestige. Programs are always changing, and star faculty sometimes move from one program to another. Nevertheless, there are a number of schools that are known for the strength of their philosophy programs. They include Harvard University, Princeton University, the University of Michigan at Ann Arbor, University of Pittsburgh, M.I.T., University of Pennsylvania, U.C.L.A., Stanford University, U.C. Berkeley, Columbia University and the University of Chicago. Department Rankings For more detailed information about how different schools compete, students can consult department rankings. The most influential ranking is probably the Philosophical Gourmet Report, edited by Professor Brian Leiter of the University of Chicago. The report, based on the evaluations of 300 faculty members, also contains a number of useful additional resources for prospective students. More recently, the Pluralist’s Guide to Philosophy Graduate Programs  has offered an alternative perspective on the strength of various philosophy departments. This guide focuses on a number of research areas that are not as prominent in Leiters report. Another ranking that deserves some attention is the Hartmann Report, edited by graduate student John Hartmann.