Hackers, Good Or Evil Essays - Hacker, Hacking,

Hackers, Good Or Evil Imagine this, you are driving along the road and suddenly you see something spectacular. Now imagine that you are not allowed to deviate from your course to check it out. This is what a so-called ?hacker? faces. Just imagine that you saw an injured person on the side of the road. In this analogy you are not allowed to help the injured person. A hacker is not allowed to explore like everyone else in the world. A hacker is not allowed to help fix potential security holes. The term hacker can have many meanings. The most visible to the public is the person pirating software, and breaking into corporate networks and destroying information. This is the public misconception of a hacker. Back in the Unix days, a hack was simply a quick and dirty way of doing something. Hackers in those days were basically just computer experts. Nowadays hacker means the same thing as a cracker, a person who pirates software, and malicious hackers. The media, of course, never prints the good things hackers do. Most hackers provide a service to companies, by letting the company know about security holes, before a rival exploits it. Most hackers want nothing more than to simply learn. A hacker has an extreme thirst for knowledge, but not in the traditional subjects. Technology, and anything new interest hackers. In fact most security experts start out but learning and ?hacking?. The bad view of hackers is not completely false. There are hackers out there that will do there best to harm any system hey can, but most want nothing more than to find the beauty in system, or network. To hackers vast networks, and the inside of a firewall that was meant to keep them out, are the most beautiful sights on Earth. In every aspect of life there are people who exploit others. Murders, robbers, or any other criminals come from every walk of life. Even hackers have some, but like the general population, it is a small percentage. Most people would call the whole Linux community hackers, because anyone who has the knowledge to run Unix must be a hacker. This show what good hackers can do. The entire Unix GNU community is run by hackers. They all contribute toward a free operating system. They all work out the bugs, and then distribute it for free. Hackers got tired of paying for an OS that did not work well. So they all worked together Today Linux is one of the fastest growing OS's on the planet. Many would say that Linux is buggy simply because its free, but it's made by the same people who can get into any computer, or write any program to fit their needs. All Hackers are not good, but then again, all people are not good. In any case, the hacker community as a whole, has done many things for end uses. First of all they help companies make they transactions securer. Second they help develop new code, and help work the bugs out of old code. And lastly, all hackers really want to do is learn. Even if it means ?breaking in to? a computer. Most hackers break in simply to learn. Very few will touch any data. A hackers goal is for the systems administator to never even know that the hacker was in the system in the first place. The Hacker's Manifesto by the Mentor, is a classic example of how hackers feel that the rest of the world does not understand us. It shows how hackers were once shunned from society and created their own underground society. In fact 2600 Magazine has been published since the early eighties. Many articles are in this magazine about how hackers are merely misunderstood. This is the most famous article: Hackers Manifesto Another one got caught today, it's all over the papers. Teenager Arrested in Computer Crime Scandal, Hacker Arrested after Bank Tampering... Damn kids. They're all alike. But did you, in your three-piece psychology and 1950's technobrain, Ever take a look behind the eyes of the hacker? Did you ever wonder what made him tick, What forces shaped him, what may have molded him? I am a hacker, enter my world... Mine is a world that begins with school... I'm

Thermodynamics and the Cooking of a Turkey

Thermodynamics and the Cooking of a Turkey Turkeys are native to North America, called Indian fowls in some writings of the 1500s. Around 1519, ships began transporting turkeys back to Spain, thus beginning its migration to Europe. American Benjamin Franklin advocated the turkey as the national bird. The turkey became prominent in Europe in the 1800s during the holiday season, replacing the goose as the most popular Christmas bird in the latter part of the century. In 1851, Queen Victoria had a turkey in place of her standard Christmas swan. The Make-Up of a Turkey At the biochemical level, a turkey is a combination of approximately 3 parts water to one part fat and one part protein. The majority of meat comes from muscle fibers in the turkey, which are mostly proteins- notably myosin and actin. Because turkeys rarely fly but rather walk, they contain far more fat in their legs than in their breast, which results in the strong differences in texture between these sections of the bird and the difficulty in making sure that all portions of the bird are properly heated. The Science of Cooking a Turkey As you cook the turkey, muscle fibers contract until they begin to break up at around 180 F. Bonds within the molecules begin to break down, causing proteins to unravel, and the dense muscle meat to become more tender. Collagen in the bird (one of three protein fibers that attaches muscles to the bone) breaks down into softer gelatin molecules as it unwinds. The dryness of a turkey is a result of muscle proteins coagulating within the meat, which can result if it is cooked too long. Temperature Differentials Part of the problem, as described above, is that the different nature of the light and dark meat in a turkey result in different rates to reach the coagulation of the muscle proteins. If you cook it too long, the breast meat has coagulated; if you dont cook the bird long enough, the dark meat is still tough and chewy. Harold McGee, a food science writer, indicates aiming for 155 to 160 F in the breast (which concurs with the overall temperature indicated by Roger Highfield), but you want 180 degrees or above in the leg (a distinction Highfield does not address). Heating Differentials Since you ultimately want the breast and legs to be different temperatures, the question is how to successfully accomplish this. McGree presents one option, by using ice packs to keep the breast of the bird about 20 degrees lower than the legs while thawing, so that the legs get a heat start on the cooking process when theyre put in the oven. Alton Brown, of Food Networks Good Eats, once presented another way to establish different heating rates, using aluminum foil to reflect heat away from the breast, thus resulting in the legs heating faster than the breast. His current roast turkey recipe on the Food Network website does not include this step, but if you watch the related videos, it shows the steps involved in using the aluminum foil. Cooking Thermodynamics Based on thermodynamics, it is possible to make some estimations of cooking time for a turkey. Considering the following estimations, it becomes fairly straightforward: Assume the oven maintains a constant temperature throughout.Assume the thermal diffusivity is independent of temperature and time.Assume the turkey is so plump that it can be estimated as a sphere. You can then apply the principles of Carlaw Jaegers 1947 Conduction of Heat in Solids to come up with an estimate for the cooking time. The radius of the hypothetical spherical turkey falls out, resulting in a formula based solely on mass. Traditional Cooking Times Small bird - twenty minutes per pound 20 minutesLarge bird - fifteen minutes per pound 15 minutes It would appear that these traditional cooking times work well in conjunction with the thermodynamic calculations provided, which give the time as being proportional to the mass to the power of two-thirds. Panofsky Turkey Constant Pief Panofsky, former SLAC Director, derived an equation to attempt to more precisely determine the cooking time of a turkey. His problem is that he disliked the traditional suggestion of 30 minutes per pound, because the time a turkey should be cooked is not a linear equation. He used t to represent the cooking time in hours and W as the weight of the stuffed turkey, in pounds, and determined the following equation for the amount of time the turkey should be cooked at 325 degrees Fahrenheit. According to the report, the constant value 1.5 was determined empirically. Heres the equation: t W (2/3)/1.5 Particle Accelerators Create Shrink Wrap The plastic shrink wrap that turkeys (specifically Butterball turkeys) come in may also have an amazing connection to particle physics. According to Symmetry magazine, some of these forms of shrink wrap are actually created by a particle accelerator. Particle accelerators use electron beams to knock hydrogen atoms off of the polymer chains within the polyethylene plastic, making it chemically active in just the right way so that when heat is applied it shrinks around the turkey. Theres a bit more detail provided in the Symmetry article on the subject. Sources and Further Reading Thermodynamics OverviewThe Physics of Christmas by Roger HighfieldSymmetry Breaking blog - The Panofsky turkey constantPhysics Talks Turkey This ThanksgivingSymmetry magazine - Accelerator applications: shrink wrapFood Network - Good Eats Roasted Turkey recipeCocktail Party Physics blog - A Taste of Science for Turkey DaySymmetry Breaking blog - Physicists talk turkey

The growth diagnostic on Tunisia Assignment Example | Topics and Well Written Essays - 4000 words

The growth diagnostic on Tunisia - Assignment Example In the end of 1987, Bourguiba was replaced by Zine el Abidine Ben Ali as the president, he had a smooth time in his government until December 2010 when nationwide protests started over the issues of high rate of unemployment, corruption by the government officials, increasing poverty and increased prices of edibles and fruits and this protest aggravated in jan’2011 which resulted in the killing of hundreds of people. Ben Ali dismissed the government on 14th January 2011 and he left the country on the same day and by the end of Jan’2011, the Prime Minister of the country announced that a National Unity Government will be formed and he announced Fouad M’Bazaa as the president of Tunisia for the interim period. Geography: It is situated in Northern Africa and it is surrounded by the Mediterranean Sea and it is present between Algeria and Libya. On the world map, its geographical coordinates are 34 00 N, 9 00 E. total area of Tunisia is about 163,610 square kilometer s which is comparatively larger than Georgia. It shares international boundaries with Libya and Algeria and the span of these boundaries is 459 km and 965 km respectively. Its Coastline spans about 1,148km. Climate of Tunisia is quite variable as in the northern region of the country, the winters are mild and rainy but the summers are dry and warm and in the southern region of the country, there is desert. Tunisia is a blend of hilly regions in the north and there are hot and dry plains and also the semiarid area of southern region of the country which joins the Sahara Desert. Tunisia has a lots of natural resources including petroleum, phosphates and metals like iron ore, lead and zinc. About 17% of the land of this country is used for agricultural proposes. The disposal of toxic and waste material is ineffective and poses a serious risk to the health of the community living in there. Other potential natural hazards include the pollution of the drinking water with the sewage and th ere are limited amount of fresh water reservoirs, there is a trend towards increase deforestation as well as soil erosion which results into the desertification of the country. Tunisia holds the strategic location in the central portion of the Mediterranean; nowadays, Malta and Tunisia are having mutual talks to make use of the continental shelf between the two countries especially for the exploration of natural resources like Oil. People of Tunisia: The population of Tunisia will be about 10.6 Million in July 2011 and it is 78th biggest country population wise of the world. About 70% of this population is of the productive age i.e. from 15-64 years, the population growth rate of the country will be 0.978% in 2011. The birth rate is 17.4 births/1,000 population and the death rate is 5.83 deaths per 1000 population. Urban population constitutes about 67% of the total population with 1.5% annual rate of urbanization, the major city of Tunisia is its Capital that is Tunis and its popul ation was about 759,000 in 2009. Infant mortality rate of Tunisia is around 26 deaths among every 1000 live births and the life expectancy at birth is about 75 years. As AIDS is quite a prevalent disease in Africa so for information proposes the adult prevalence of AIDS is less than 0.1% in 2009 and the total number of AIDS patients in Tunisia are about