Computer Crime Essays - Hacker, Phreaking, Hacking, Free Essays

Computer Crime Essays - Hacker, Phreaking, Hacking, Free Essays Computer Crime Computer Crime It's the weekend, you have nothing to do so you decide to play around on your computer. You turn it on and then start up, you start calling people with your modem, connecting to another world, with people just like you at a button press away. This is all fine but what happens when you start getting into other peoples computer files. Then it becomes a crime, but what is a computer crime really, obviously it involves the use of a computer but what are these crimes. Well they are: Hacking, Phreaking, & Software Piracy. To begin I will start with Hacking, what is hacking. Hacking is basically using your computer to Hack your way into another. They use programs called scanners which randomly dials numbers any generating tones or carriers are recorded. These numbers are looked at by hackers and then used again, when the hacker calls up the number and gets on he's presented with a logon prompt, this is where the hacking really begins, the hacker tries to bypass this anyway he knows how to and tries to gain access to the system. Why do they do it, well lets go to a book and see Avid young computer hackers in their preteens and teens are frequently involved in computer crimes that take the form of trespassing, invasion of privacy, or vandalism. Quite often they are mearly out for a fun and games evening, and they get entangled in the illegal use of their machines without realizing the full import of what they are doing , I have a hard time believing that so lets see what a hacker has to say about what he does Just as they were enthraled with their pursuit of information, so are we. The thrill of the hack is not in breaking the law, it's in the pursuit and capture of knowledge. , as you can see the hacker doesn't go out to do destroy things although some do. It's in the pursuit of knowledge. Of course this is still against the law. But where did all of this start, MIT is where hacking started the people there would learn and explore computer systems all around the world. In the views of professional hacking is like drugs or any other addictive substance, it's an addiction for the mind and once started it's difficult to stop. This could be true, as hackers know what they are doing is wrong and they know odds are they will be caught. But as I mentioned some hackers are just above average criminals, using there skills to break in banks and other places where they can get money, or where they can destroy information. What a hacker does at a bank is take a few cents or even a few fractions of a cents from many different accounts this may seem like nothing but when all compiled can be alot. A stick up robber averages about $8,000 each job, and he has to put his life and personal freedom on the line to do it while the computer hacker in the comfort of his own living room averages $500,000 a job. As for people destroying information, this is for taking some one down, destruction of data could end a business which for some is very attractive. It can cost a company thousands of dollars to restore the damage done. Now that you have an understanding of what a hacker is, it time to move on to someone closely associates with a hacker. This is a Phreak, but what is that. For the answer we turn to the what is known as the Official Phreakers Manual Phreak [fr'eek] 1. The action of using mischievous and mostly illegal ways in order to not pay for some sort of telecommunications bill, order, transfer, or other service. It often involves usage of highly illegal boxes and machines in order to defeat the security that is set up to avoid this sort of happening. [fr'eaking] v. 2. A person who uses the above methods of destruction and chaos in order to make a better life for all. A true phreaker will not go against his fellows or narc on people who have ragged on him or do anything termed to be dishonourable

Idioms and Expressions in English Using Work

Idioms and Expressions in English Using Work The following idioms and expressions use the noun / verb work. Each idiom or expression has a definition and two example sentences to help your  understanding of these common idiomatic expressions with work. English Idioms and Expressions All in a days work Definition: nothing special, part of the routine Dont worry about it. Its all in a days work.Cooking is all in a days work. All work and no play makes Jack a dull boy. Definition: Idiom meaning that you need to have fun in order to be a happy, healthy person Go home! Remember: All work and no play makes Jack a dull boy.Im worried about him. He hasnt yet understood that all work and no play makes jack a dull boy. Dirty work Definition: Necessary, but uninteresting, or difficult work He did the dirty work on that project.Have you got around to doing the dirty work yet? Get down to work Definition: Stop relaxing, focus on important task Hey, lets get down to work here!Sorry, Ive got to get off the phone and get down to work. Get worked up over something Definition: become angry or annoyed about something He got all worked up over the last exam.Dont get worked up over the garden. Ill take care of it tomorrow. Make short work of something Definition: do something quickly I made short work of the assignment and moved on to the next job.Give it to John. Hell make short work of it. Work like a horse Definition: work a lot, work very hard Janet works like a horse!Why dont you ask Tom. He works like a horse. Work out for the best Definition: eventually finish well Dont worry about your problems. Everything will work out for the best.The divorce worked out for the best for the whole family. Work something off Definition: lose weight Im going running to work dinner off.She went to the gym to work off a few pounds. Throw a monkey wrench in the works Definition: cause a disturbance in something that seems clear and understandable I hate to throw a monkey wrench in the works, but dont you think we should ask Andy to help.Everything was set to go when Jack threw a monkey wrench in the works!

Jaguar Cars Essay Example | Topics and Well Written Essays - 1000 words

Jaguar Cars - Essay Example Product: Jaguar car is the product in this case. The new XK is available as either Coupe or Convertible, with the option of a normally aspirated 4.2 litre V8 engine or as the Supercharged R version. The XK 4.2L V8 Coup is a 6-Speed automatic car with acceleration 0-60 mph in 5.9 sec with a top speed of 155-250 Kmph. Its fuel efficiency is around 17 kmpl. The company proudly pronounces that Jaguar is dramatically beautiful, powerful and luxurious car. Its available in different variants like Coupe or Convertible, 4.2 litre V8 XK or Supercharged XKR. Ford focuses on its exhilarating lines and muscular intent in next-generation lightweight aluminium to attract the young consumer. Its interior too is designed quite aesthetically. A cockpit designed around the driver - intuitive controls, inspired by a sporting pedigree and tailored to respond precisely on demand. The XK features a host of intelligent technologies, each engineered to empower the driver and enhance the pleasure of driving. Jaguar has axed its S-Type model and replaced it with a new sports saloon called the XF. Place: The Ford Europe and Premier Automotive Group (PAG) recorded strong revenue growth in fiscal 2005. The Ford Europe and PAG primarily include the sale of Fordbrand vehicles in Europe and Turkey as well as sale of PAG brand vehicles. Jaguar form an important component of this brand identity together with Volvo, Land Rover and Aston Martin. Revenues from Ford Europe and PAG reached $60,258 million in 2005, up 11.3% over 2004. Ford Europe and PAG accounted for 34% of total revenues. Growing Ford Europe and PAG has enabled the company to offset revenue decline in the Americas division. Therefore Ford strategically placed its Jaguar brand in UK and other EU nations. From the financial figures so far it appears that Ford's strategy has worked well. In fact, Jaguar pitted couple of its models against BMW, but The S-Type, which was launched as a direct competitor to the BMW 5-Series in 1999 was widely criticized for being overly conservative, and the model is now ready for being discon tinued. Price: The car is competitively priced. The base end 4.2 litre V8 Coup is available with a price tag of 59,995.00. In the fourth quarter of 2006 Ford suffered some losses owing to ending of its employee-discount pricing incentives, rising gas prices, and rising interest rates. Now a days the pricing strategy is also influenced by the growing trend of users purchasing used SUVs. Fuel economy plays a major role in deciding the price factor and attraction for the customers. Promotion: Marketing communication in turn helps a company in building a brand, creating brand loyalties, increase in sales, cutting costs, etc. UK market is a very diverse market in general which caters to customers/ consumers from different walks of life, different cultures, ethnic groups and age groups. In today's market driven economy concept, the art of communication to existing consumers as well as prospective consumers takes a great deal out of the managerial brain storming sessions. Jaguar launched a wide ranging online and mobile campaign in September 2006 for its new XKR sports car, which was officially unveiled at The London Motor Show. Interactive marketing took the lead for the car's launch, with cinema and press advertisement backing up. There were

Doctoral statistical methods Essay Example | Topics and Well Written Essays - 250 words

Doctoral statistical methods - Essay Example These involve observation of track behavior, responses and associate it with the sound trigger. However, the assessors may apply quantitative analyses to determine the experiences of the 33 women. Quantitative data are used when the factors being analyzed are countable (Chiang 2003). The results of which are extrapolated to draw general deductions on whole populations. These methods analyze and explain data in relation to a phenomenon; furthermore, it provides guidance in the presentation of data. The responses are studied for randomness and systematic sequences (Chiang 2003). The assessors correlate prenatal experiences with effects to sound by assessing the propensity to suckle in response to the most familiar readings. Consequently, the assessor must acknowledge the occurrences of sampling errors that may emanate from unique cases with the babies. These include the hearing ability, brain development, the general mood and appetite of the infant. Qualitative readings are represented scientifically in histograms, graphs and charts (Chiang 2003). However, quantifiable data are summarized to measure the correlation, variability and central tendencies. Merging of the two methods in a mixed approach provides a comprehensive answer that determines the responses of speech and language amidst

Injustices during the progressive Essay Example for Free

Injustices during the progressive Essay During the late 1800s and early 1900s, there were a lot of injustices in the United States. The Progressive Movement, which began in the late 1800s attempted to bring about government reforms and correct injustices in America. One example of the problem in the U.S. was over population of the American cities. More and more people began to move cities from rural areas for jobs. As you can see in Document I, the cities were overcrowded and the infrastructure could not hold up with the influx of people moving to urban areas. The people lived in overcrowded housing developments that were dirty and poor. There was also abuse in industries. This was exposed by Upton Sinclair (Document 2). One of his most well known novels was The Jungle, which showed the abuse in the meat packing industry. He uncovered how the people would take extremely spoiled meat and use it as sausage or put it in to a can. They also used all parts of the meat and even rats were found to be in the meat. By writing this book, Sinclair was able to expose the corruption in the industry of meat packing, and Congress passed the Meat Inspection Act. A position change brought about the declining numbers of children between the ages of ten and fifteen who worked. In Document 3, you can see by the chart that the number of children working decreased by 6.8% from 1890 to 1920. Children were often used as cheap labor and were abused greatly. The government was able to reduce the number of working children under sixteen during this period of time because many states passed children labor laws. Around this time, big businesses came to power. As shown in Document 4, there were many abuses in businesses. The people who ran and formed these industries/trusts/businesses, such as Andrew Carnegie, Rockefeller, and Henry Ford. They acted like the big bosses and held control of much of the U.S. industry. In Document 5, Teddy Roosevelt explained how he felt about how these big businesses (oil, steel, copper, etc.) should be regulated if they are only in it for the money and power. Teddy Roosevelt became known as  a trust-buster because he enforced the Sherman Antitrust Act. During the late 1800s the Progressive Party was formed. They wanted to bring about change in the U.S. One of their main goals included the reforming of industries. In Document 6, their platform is partly shown. Under their platform, they wanted to prevent accidents, diseases acquired on the job, and unemployment. They further wanted to have better health and safety centers, and minimum wage. In 1913, the 17th Amendment was added to the Constitution (Document 7). When the Constitution was first written in 1787, the senators were elected by legislators. In order to make the selection of senators more democratic, the 17th amendment was added. It said that senators would be elected by people from each state, not by the legislature. This is why we now have candidates that campaign for seats in the senates to the people. By adding this amendment to the Constitution, it made the U.S. more democratic. Women suffrage also took place during this time. People like Susan B. Anthony (Document 8) and Elizabeth Cady Stanton worked and campaigned for women to be allowed to vote. Susan B. Anthony used the preamble of the Constitution to argue her case. She stated that the Constitution said We the people not We the men' She said the Constitution was written for all people, not just men. Her efforts eventually paid off, and the 19th amendment was passed in 1922 allowing women to work. In conclusion there were many injustices in the U.S. from the late 1800s to the early 1900s. The Progressive Movement help to bring about more change as did the government. Teddy Roosevelt tried the limit the abuses of big businesses, and women suffrage was granted, and the meat packing industry was exposed. With each time comes problems but with activists some are changed and reformed. During this time period, there were a lot of injustices and issues, many of which were discovered, addressed, and reformed.

Ambition in Macbeth Essay -- Macbeth essays

Ambition in Macbeth      Ã‚  Ã‚  Ã‚  Ã‚   A key issue involved in Macbeth is ambition. Ambition is created when determination gets out of hand. It finds its most significant expressions in the plays two main characters, Macbeth and Lady Macbeth. The main reason why it all gets started is because of the witches' interference by putting suggestions into Macbeth's mind. Lady Macbeth's ambition forces him to act on these ambitions as well. The couple proves that unchecked ambition will ultimately destroy.    Macbeth is a brave man who is not naturally inclined to perform evil deeds, yet he desperately wants and desires power and succession. At the end, he is not happy with what he has accomplished, "I am afraid to think what I have done; look on `t again I dare not" (Shakespeare Macbeth 2.2.51-52). He kills Duncan against his own logical judgement and later drowns in paranoia and guilt. Macbeth is led to wicked thoughts by the prophecies of the three witches, especially after the witches' prophecy that he will be made Thane of Cawdor comes true. Macbeth is a powerful man and...

My Experience with Technology

I have never really thought about how much I depend of technology. We got our first family computer when I was about 9 years old. At the time my brother was a computer geek (still is) and he would go buy the computer books that had programs in them where you had to type everything out to get a game on the computer to play. So when I would help or when he was teaching me, we would mix some of the programs up and see if we could come up with anything. Then it was to BBS’. That opened a whole new world!We could meet people online without actually meeting them. Now its becoming more and more complexed.. Now there is so many programs out there it’s hard to keep up. I have taught myself just about everything I do on the computer. I know Microsoft Word, Windows, Adobe reader and those are just the ones I can remember off hand.. I am pretty comfortable learning new programs and look forward to it. At this time the only one I can think of that my hinder me is Excel. Since I have only used it once I am not 100% comfortable with it yet.But I will be by the time this class is over. While I worked as a manager at a pet store we used a program called Campbell, it would keep track of the employees hours, what we sold in the store and everything in between. While I was at Staples I was learning all kinds of programs and applications. At this time the only thing that comes to mind that I would have a concern about would be not being able to ask a question and getting an answer right away. I look forward to this class and learning new applications that I can use on the computer.

How Miller Creates Conflict in the Crucible?

English Controlled Assessment Draft: Conflict in the Crucible The play I am studying for this essay is called â€Å"The Crucible† and I will be focusing on Act 1 of the book. The question I will be answering is what’s the most powerful type of conflict in the opening act of the crucible? The word conflict means a state of disharmony, opposition and or fighting. The conflict portrayed in the Crucible is often described as tools used to describe events in Millers time period.For example, witchcraft doesn’t exist in Salem yet that is the basis of the storyline of the play and many people die as a result of accusations over witchcraft. During the time Miller wrote this book, the cold war was happening and many people in America were accused of communism (including Miller himself), when they were accused they were routinely asked to give names of other communists which is the same as the ‘witches’ in Salem were asked, whether the devil â€Å"come-with an other person† and many of these people turned out to not be communists in the first place same as the accused ‘witches’.So it seems that Miller uses the fact there were not any witches in Salem as a metaphor suggesting there were not any communists in America. Miller conveys Putman as a source of conflict as a result of his rivalry for power with Parris. This is demonstrated when Mr Putman is seen as attempting to stir drama over Parris’s daughters situation â€Å"No witchcraft! Now look you Mr Parris†.As Parris is so plainly defiant in his denial of â€Å"witchcraft† affecting his daughter, this portrays Mr Putman as deliberately trying to annoy Parris to most likely make him look like a loose cannon in the eyes of Salem to steal his job. Which makes sense as Miller tells us that the Putnam’s resent Parris and Mr Putnam wanted his brother in law to have Parris’s position. The directive â€Å"Now look you† magnifies this a s although Parris has more authority than him, he is already seen as trying to order Parris around.This is then amplified when Parris replies stating â€Å"They will howl me out of Salem for such corruption in my house† as Mr Putnam is seen as the main rival to Parris, it seems that Parris implies that Mr Putnam is the one who will â€Å"howl† him out of Salem. In addition, the word â€Å"Howl† at first seems to be a hyperbole as Salem is first thought of as a good religious community, but it then creates contrast towards the end of act one as the town is seen as willing to give the death penalty to children because they think that their witches â€Å"This woman must be hanged! . This creates tension throughout the audience as it makes them realize Salem isn’t as united as it first seemed and there is a massive power struggle between the two families as â€Å"howl† also portrays Mr Putnam as a monster, more specifically a werewolf which is a mytho logical predator and predators like to be at the top of the food chain. However, Parris already has a place on top of the metaphorical food chain which places Putnam and Parris as natural rivals.Also, it creates tension in the audience by showing just how important power is in Salem as Parris and Putman both care more about power and their reputation than their own daughters. Miller’s intentions of this may be to show that people will act in extreme ways to protect themselves including neglecting their daughter, which links back to Millers era as many accused communists were interrogated under torture and many tried to escape leaving behind their families.In the play â€Å"the crucible† Miller portrays a community in conflict when proctor’s commitment to their puritan ideology is doubted. This is demonstrated when Proctor states â€Å"No, No, Abby. That’s done with† when Abigail appears to flirt with him. The connotation of â€Å"That’s don e with† suggests that Proctor once committed the sin of Adultery with her which is a very serious sin to the Puritans. The repetition of â€Å"No, No† shows that proctor knows he’s done a bad thing not just in terms of the Puritan Ideology but also in terms with his own morals.However, the fact Abigail wants to do it again and doesn’t consider it a bad thing shows the conflict and divides between the older and younger generations in Salem as the younger generation’s challenge the Puritans rules without remorse. This creates nervousness within the audience as it demonstrates just how fragile the unity of the community in Salem is. It also links back to Miller’s intentions as he may be trying to suggest that paranoia divided communities as it did in America when many people were being accused of communism over little things.Miller intensifies a sense of conflict towards the end of act 1 through a fast paced scene when multiple accusation of wit chcraft are made. This is started when Abigail exclaims â€Å"I want to open myself! † and from there onwards Betty also takes up the chant and blames people â€Å"I saw Martha Bellows with the devil! † The fact that the curtain descends with â€Å"Devil† as the last word spoken reflects the state of fear on stage and the divides caused by this conflict to Salem as normally the people of Salem talk about God but as a result of this conflict they end by talking about he Devil, an abnormal thing for them. The use of Exclamation marks, snappy sentences and the amount of accusations made infers that it is a fast paced, loud scene and reflective of the hysteria on stage. This creates dramatic irony towards the audience as they know the truth which is that witchcraft doesn’t actually exist, the fact witchcraft is punishable by death shows them that the girls are willing to let someone else die to prove themselves innocent thus creating a sense of conflict.The r epetition of the word â€Å"Devil† towards the end makes the audience feel sympathy towards the people that are getting blamed as they know that none of it is actually true. This can be linked back to Millers intentions as he may be trying to show that when people fear for their life they are willing to lie and blame others to save themselves which also occurred during the cold war (Millers era) when people lied and blamed other people of being communists to avoid themselves going to prison.To conclude, there have been many powerful conflicts throughout act 1, my final judgement is the rivalry of power between Parris and Putnam is the most powerful conflict. This is important as it provides the baseline for the story line. Parris states that there are ‘factions’ after his position in Salem, It is likely that he is meaning the Putnam family as they are seen as a main antagonistic rival in ‘The Crucible’ against Parris. He describes calling for Reveren d Hale as a â€Å"precaution† but denies that â€Å"witchcraft† is the reason for his daughter’s problem.As a result it is likely that he called for Mr Hale just so Mr Putnam doesn’t complain and demand his removal from power, so it is essential that Miller introduced with this conflict as without it the play wouldn’t be as gripping. This conflict effects the audience by making them realize that even before witchcraft entered the picture there was already a fragility in the community relations in Salem and it’s likely that these conflicts would probably at some time be realised and spark irrational action. Witchcraft is seen as just the trigger to this.

Principles of Newtons Law of Gravity

Principles of Newtons Law of Gravity Newtons law of gravity defines the attractive force between all objects that possess mass. Understanding the law of gravity, one of the fundamental forces of physics, offers profound insights into the way our universe functions. The Proverbial Apple The famous story that Isaac Newton came up with the idea for the law of gravity by having an apple fall on his head is not true, although he did begin thinking about the issue on his mothers farm when he saw an apple fall from a tree. He wondered if the same force at work on the apple was also at work on the moon. If so, why did the apple fall to the Earth and not the moon? Along with his Three Laws of Motion, Newton also outlined his law of gravity in the 1687 book Philosophiae naturalis principia mathematica (Mathematical Principles of Natural Philosophy), which is generally referred to as the Principia. Johannes Kepler (German physicist, 1571-1630) had developed three laws governing the motion of the five then-known planets. He did not have a theoretical model for the principles governing this movement, but rather achieved them through trial and error over the course of his studies. Newtons work, nearly a century later, was to take the laws of motion he had developed and applied them to planetary motion to develop a rigorous mathematical framework for this planetary motion. Gravitational Forces Newton eventually came to the conclusion that, in fact, the apple and the moon were influenced by the same force. He named that force gravitation (or gravity) after the Latin word gravitas which literally translates into heaviness or weight. In the Principia, Newton defined the force of gravity in the following way (translated from the Latin): Every particle of matter in the universe attracts every other particle with a force that is directly proportional to the product of the masses of the particles and inversely proportional to the square of the distance between them. Mathematically, this translates into the force equation: FG Gm1m2/r2 In this equation, the quantities are defined as: Fg The force of gravity (typically in newtons)G The gravitational constant, which adds the proper level of proportionality to the equation. The value of G is 6.67259 x 10-11 N * m2 / kg2, although the value will change if other units are being used.m1 m1 The masses of the two particles (typically in kilograms)r The straight-line distance between the two particles (typically in meters) Interpreting the Equation This equation gives us the magnitude of the force, which is an attractive force and therefore always directed toward the other particle. As per Newtons Third Law of Motion, this force is always equal and opposite. Newtons Three Laws of Motion give us the tools to interpret the motion caused by the force and we see that the particle with less mass (which may or may not be the smaller particle, depending upon their densities) will accelerate more than the other particle. This is why light objects fall to the Earth considerably faster than the Earth falls toward them. Still, the force acting on the light object and the Earth is of identical magnitude, even though it doesnt look that way. It is also significant to note that the force is inversely proportional to the square of the distance between the objects. As objects get further apart, the force of gravity drops very quickly. At most distances, only objects with very high masses such as planets, stars, galaxies, and black holes have any significant gravity effects. Center of Gravity In an object composed of many particles, every particle interacts with every particle of the other object. Since we know that forces (including gravity) are vector quantities, we can view these forces as having components in the parallel and perpendicular directions of the two objects. In some objects, such as spheres of uniform density, the perpendicular components of force will cancel each other out, so we can treat the objects as if they were point particles, concerning ourselves with only the net force between them. The center of gravity of an object (which is generally identical to its center of mass) is useful in these situations. We view gravity and perform calculations as if the entire mass of the object were focused at the center of gravity. In simple shapes - spheres, circular disks, rectangular plates, cubes, etc. - this point is at the geometric center of the object. This idealized model of gravitational interaction can be applied in most practical applications, although in some more esoteric situations such as a non-uniform gravitational field, further care may be necessary for the sake of precision. Gravity Index Newtons Law of GravityGravitational FieldsGravitational Potential EnergyGravity, Quantum Physics, General Relativity Introduction to Gravitational Fields Sir Isaac Newtons law of universal gravitation (i.e. the law of gravity) can be restated  into  the form of a  gravitational field, which can prove to be a useful means of looking at the situation. Instead of calculating the forces between two objects every time, we instead say that an object with mass creates a gravitational field around it. The gravitational field is defined as the force of gravity at a given point divided by the mass of an object at that point. Both  g  and  Fg  have arrows above them, denoting their  vector nature. The source mass  M  is now capitalized. The  r  at the end of the rightmost two formulas has a carat (^) above it, which means that it is a  unit vector  in the direction from the source point of the mass  M. Since the vector points away from the source while the force (and field) are directed toward the source, a negative is introduced to make the vectors point in the correct direction. This equation depicts a  vector field  around  M  which is always directed toward it, with a value equal to an objects gravitational acceleration within the field. The units of the gravitational field are m/s2. Gravity Index Newtons Law of GravityGravitational FieldsGravitational Potential EnergyGravity, Quantum Physics, General Relativity When an object moves in a gravitational field,  work  must be done to get it from one place to another (starting point 1 to  endpoint  2). Using calculus, we take the integral of the force from the starting position to the end position. Since the gravitational constants and the masses remain constant, the integral turns out to be just the integral of 1 /  r2  multiplied by the constants. We define the gravitational potential energy,  U, such that  W  Ã‚  U1  -  U2. This yields the equation to the right, for the Earth (with mass  mE. In some other gravitational field,  mE  would be replaced with the appropriate mass, of course. Gravitational Potential Energy on Earth On the Earth, since we know the quantities involved, the gravitational potential energy  U  can be reduced to an equation in terms of the mass  m  of an object, the acceleration of gravity (g   9.8 m/s), and the distance  y  above the coordinate origin (generally the ground in a gravity problem). This simplified  equation  yields  gravitational potential energy  of: U  Ã‚  mgy There are some other details of applying  gravity on the Earth, but this is the relevant fact with regards to gravitational potential energy. Notice that if  r  gets bigger (an object goes higher), the gravitational potential energy increases (or becomes less negative). If the object moves lower, it gets closer to the Earth, so the gravitational potential energy decreases (becomes more negative). At an infinite difference, the gravitational potential energy goes to zero. In general, we really only care about the  difference  in the potential energy when an object moves in the gravitational field, so this negative value isnt a concern. This formula is applied in energy calculations within a gravitational field.  As a form of energy, gravitational potential energy is subject to  the law of conservation of energy. Gravity Index: Newtons Law of GravityGravitational FieldsGravitational Potential EnergyGravity, Quantum Physics, General Relativity Gravity   General Relativity When Newton presented his theory of gravity, he had no mechanism for how the force worked. Objects drew each other across giant gulfs of empty space, which seemed to go against everything that scientists would expect. It would be over two centuries before a theoretical framework would adequately explain  why  Newtons theory actually worked. In his  Theory of General Relativity,  Albert Einstein  explained gravitation as the curvature of spacetime around any mass. Objects with greater mass caused greater curvature, and thus exhibited greater gravitational pull. This has been supported by research that has shown light actually curves around massive objects such as the sun, which would be predicted by the theory since space itself curves at that point and light will follow the simplest path through space. Theres greater detail to the theory, but thats the major point. Quantum Gravity Current efforts in  quantum physics  are attempting to unify all of the  fundamental forces of physics  into one unified force which manifests in different ways. So far, gravity is proving the greatest hurdle to incorporate into the unified theory. Such a  theory of quantum gravity would finally  unify  general relativity with quantum  mechanics into a single, seamless and elegant view that all of  nature  functions under one fundamental type of particle interaction. In the field of  quantum gravity, it is theorized that there exists a  virtual particle  called a  graviton  that mediates the gravitational  force because that is how the other three fundamental forces operate (or one force, since they have been, essentially, unified together already). The graviton has not, however, been experimentally observed. Applications of Gravity This article has addressed the fundamental principles of gravity. Incorporating gravity into kinematics and mechanics calculations is pretty easy, once you understand how to interpret  gravity on the surface of the Earth. Newtons major goal was to explain planetary motion. As mentioned earlier,  Johannes Kepler  had devised three laws of  planetary motion  without the use of Newtons law of gravity. They are, it turns out, fully consistent and one can prove all of Keplers Laws by applying Newtons theory of universal gravitation.

Identify the Common Poplars in North America

Identify the Common Poplars in North America The genus Populus  most common North American natives include  one true poplar in the north, four primary species of cottonwoods and the quaking aspen. Most of the known 35 natural poplar species live in the Northern Hemisphere. The cottonwoods thrive in an ecosystem associated with riparian and wetland areas in eastern and western North America. The aspens are most comfortable in boreal environments dominated by conifers with aspen being a major broad-leaved species. Balsam poplar  (Populus balsamifera)  is the northernmost American hardwood and a major deciduous tree in Canada and Alaska. The Common North American Poplar Species Quaking aspenBalsam poplarEastern cottonwoodBlack cottonwood All have long reproductive catkins that appear just before the new leaves of spring and can help in identification. The resulting fruit is a capsule that opens into 2 tp 4 parts. The tufted seeds are shed in masses of white cotton which can cover the ground inches deep. The leaves of aspen and Eastern cottonwood are deltoids  where black cottonwood and balsam poplar are ovate. They occur on a branch alternately, are simple (single leaf) and mostly toothed. Interesting Facts The Eastern Cottonwood,  Populus deltoides, is one of the largest North American hardwood trees.  The aspen  has the widest range in the United States.  It occurs throughout the eastern United States and throughout Canada.Yellow poplar is not a true poplar and not listed here.

International Operational And Logistical Strategies Essay

International Operational And Logistical Strategies - Essay Example This research will begin with the statement that total quality management encompasses combined management effort to improve and advance the quality of the company’s products at all levels. It has to do with meeting the customers’ quality expectation. Total quality management aids at improving effectiveness, flexibility, and effectiveness of an organization to meet the needs and expectation of all involved stakeholders. It facilitates planning and organizing to understand the contribution of all involved stakeholders. The frequently wasted energy and effort is eliminated through concrete and effective planning and organization. In total quality management, the leaders’ works on productive strategies of ensuring quality service management and total elimination of the detected problems and shortcomings. The ideology of total quality management accesses the management capability of managing people and business processes to meet customers’ quality expectation. Businesses provide the best outcome in satisfying the customers need through a well working combination of the total quality management and effective organization leadership. The guiding principle behind total quality management is suppliers-customer interface. The interface should be functional in internal level and in external level. Total commitment to quality is very essential in achieving the desired customer quality. To achieve the expectation of the total quality management ideology, frequent transmission of the quality messages together with the need and desire to change the culture of an organization for quality advancement are very fetal and necessary. The three main elements in total quality management are people, process, and systems available in the organization (Jarrett 2006, p. 57) In total quality management, the term quality refers to meeting fully the needs and expectations of the organizations’ customers. The component of quality in total quality management includes; reliability, maintenance, availability appearance, performance, delivery, cost effectiveness, and delivery. The understanding of the organization on all this needs necessitate total quality management (Joseph 2008, p. 50). After comprehensive understanding of the customer’s needs, the organization must strategize on the best means of achieving them for the sake of the customers (Slack, Chambers, Johnston, 2010, p. 19). The initial stage in achieving the quality expectation of the customer is conducting market research. Research helps in understanding the actual and real needs of the customers. The collected finding should be communicated to all relevant organization departments. For an organization to effectively meet the expectation of its customers, the involved stakeholders, department, activities must be integrated. The organization changes should also be based on customers’ satisfaction. Proper integration of all interfaces is very necessary in achievin g total quality organization (Zimmerman, 2006, p. 23). To meet the reality of total quality management, the process of transformation must start from the top. Senior managers must have the will and desire to achieve quality in the organization service delivery. They must demonstrate their total commitment and will of offering quality services to their customers. The operational managers must follow the suit of their seniors (Harrison and van Hoek, 2008, p. 87). Communication on the need and commitment to quality service delivery is also very relevant and demanding. The principles, ideologies, and benefits of total quality management must be communicated and understood by all playing partners. Frequent interaction and consultation in the organization is the real way of developing the required quality attitude and perception among the organization workers. The other core requirement in the total quality man

Guidelines for device based therapy of cardiac rhythm abnormalities Research Paper

Guidelines for device based therapy of cardiac rhythm abnormalities - Research Paper Example Recommendations in guideline for the device based therapy of cardiac rhythm abnormality has proved to be beneficial for reducing the risk of sudden cardiac death and has improved quality of life. However, multi-centric clinical trials are needed to find an optimal timing for the implant for an indication. Guidelines for device based therapy of cardiac rhythm abnormalities. Cardiac arrhythmias are still a major threat to human health and are so deadly that they are responsible for 50% of all the cardiovascular deaths related to the cardiovascular system (Piccini, Al-Khatib, Myers, Anstrom, Buxton, Peterson, & Sanders, 2010). Arrhythmias are not always pathological; they can be physiological like bradycardia in athletes and tachycardia during anxiety. Physiological cardiac arrhythmias usually do not need any treatment, they are recovered spontaneously but, pathological arrhythmias require heroic management. Anti- arrhythmic drugs and anti-arrhythmic devices are employed as a treatment strategy for arrhythmias. Implantable cardioverter-defibrillator, pacemakers and cardiac resynchronization therapy are the devices used to prevent death from arrhythmia; use of anti-arrhythmic devices are significantly associated to reduce mortality associated with arrhythmia (Piccini et al., 2010). Devices are used to prevent arrhythmia according to the guidelines of the American Heart Association, published in 2008. Guidelines for device based therapy of cardiac rhythm abnormalities were designed by experts from the American College of Cardiology in collaboration with the American Association of Thoracic Surgery and Society of Thoracic Surgeons. The Recommendations were made after a thorough literature search so that treatment strategy can be standardized and clinical evaluation of patients can be made easy. The Guidelines aim to reduce inappropriate decisions for implantation of cardiac devices, provide confidence to cardiac consultants.When related to devices, guidelines are mea nt for promotion of their appropriate use and to abandon it’s under and over use (Epstein et al., 2008). Critical evaluation of all diagnostic procedures, diagnostic scales, and guidelines is necessary because it is directly related to appropriate health care delivery ( Epstein et al., 2008). Evidence based critical evaluation of guidelines is a scientific means to judge effectiveness of the guideline in promoting good patient care. Critical evaluation of the guidelines for device based therapy is inevitable to judge the pros and cons of the guideline; it also helps to find any danger, if associated with the recommendations. Scientific critics of the guideline are important means to generate new recommendations in order to make the guideline more favorable. Since it is related to the cardiology, critical evaluation of the guidelines for the implanted anti-arrhythmic devices are more demanding because negligence may take a patient's life in a few minutes. The nursing staff is usually the first hand care providers in hospital settings. Being medical professionals, it is inevitable for them to understand the importance of guidelines; they should know the recommended guidelines of device based management of cardiac arrhythmias because after treatment, patient’