The Disaster at Chernobyl Essay -- Nuclear Explosions Ukraine Essays H

The Disaster at Chernobyl On April 26th, 1986, operators at the Chernobyl Power Plant in Chernobyl, Ukraine, ran what they thought to be a routine safety test. But fate was not on the side of these operators. Without warning, reactor #4 became unstable, as it had been operating at a low power for a possible shutdown and the reactor’s design caused it to be unsafe at this level of power. Internal temperatures rose. Attempts to cool the system produced the opposite effect. Instantly, the nuclear core surged with power. At 1:23 p.m., the reactor exploded. The first blast ripped off the reactor's steel roof. The second blast released a large plume of radiation into the sky. Flames engulfed the building. For ten long days, fire fighters and power plant workers attempted to overcome the inferno. Thirty-one of them died of radiation poisoning. Chernobyl was the worst nuclear disaster in history. It unleashed radiation hundreds of times greater than the atomic bombs exploded over Japan during Wo rld War II. [1] Initially the Soviet Government kept the accident at Chernobyl a secret. Because radiation lacks smell or taste, and is invisible, people carried on with their daily lives, all the while inhaling radioactive particles. It took ten days for the Soviet government to evacuate the contaminated areas. Particles fell into the crops and plants of the people. Cows ate grass that had been contaminated by the nuclear particles causing the dairy produ...

The Industrial Revolution for the Disabled :: Essays Papers

The Industrial Revolution for the Disabled In this new age of Internet and the World Wide Web, everything is accessible. If you needed up to date news, research, or entertainment; just go online. Everyday people take this choice for granted, maybe by ignorance or by stupidity, but a small, ever-growing population don't have these choices. The disabled have overcome many pregitouses and were once regarded as mentally and physically retarded. But recently, a number of organizations have recognized the need for the disabled to achieve ultimate web accessibility. Of course, ultimate won't be achieved for a long time, but some accessiblility is better than none. The Americans with Disabilities Act has already come up with accessibility requirements that the Federal Government has adopted. (Applicability of... 2000) Aol has changed it's format due to a law suit by the National Federation for the blind. (Applicability of... 2000) Not only are public sectors changing their websites, but many private sectors are as well (Applicability of... 2000) "To ensure individuals with disabilities have full and equal enjoyment of the facilities they provide when the provision of such access is measureable. (Applicability of... 2000) Assistive Technology "Assistive Technology is any device, piece of equipment, of software that is used to help a person with a disability or impairment, reach full functional capacity. Some examples of high-tech assistive technology include voice recognition systems, voice synthesis, large print display, braille embossing, and alternative computer input devices." (University of Iowa) Some statistics on the widespread concern of developers for accessible websites include:"50 million people in the U.S. have some kind of functional limitation. 15% of those cannot use a computer without some form of assistive technology and about 8% of those who use the Web have disabilities." (McKeefy 1998) As research shows the internet is bringing a world of information to users with disabilities, but adversely, it is difficult for vision impaired people to access a multimedia-rich site. (McKeefy 1998) New equipment for the sight-impaired are now available, but one might think it is only available to people with money. According to Greg Meise, President of Lenexa (a Kansas based reseller), "'Declining technology prices now have made these products available to a wider audience. Affordability has changed the market.'" (McKeefy 1998) The prices of these special technologies have dropped and impaired users have an option of mixed technologies. (McKeefy 1998) Awareness The ADA (Americans with Disabilities Act) has set up requirements for the internet to make web sites accessible for people with disabilities.

What Can Indivuduals Do to Help Protect Environment and Why?

Environment Tables of Contents: Introduction: The environment is defined as all the elements (biotic or abiotic) that surround an individual or species, some of which directly contribute to support herself one, or as all natural conditions (physical, chemical, biological) and cultural (sociological) can act on living organisms and human activities.The twenty-first century, environmental protection has become a major issue, along with the idea of necessary degradation of both global and local, because of human pollution. The preservation of the environment is one of the three pillars of sustainable development. It is also the seventh of the eight Millennium Development, considered by the UN as â€Å"crucial to the success of the other objectives outlined in the Declaration of the Millennium Summit†. Protecting the environment is preserved and the future survival of humanity.Indeed, the environment is our source of food and drinking water. Air is our source of oxygen. The climate allows our survival. And biodi versity is a potential reservoir of drug. Preserving the environment is a matter of survival. In fact in this report we will talk about why protect the environment is important and secondly we will see how we can help to protect the environment. Protect the environment, why is it important? Protecting the environment is important for our lives, for a healthy lifestyle but also to the development of the species because there is still much to discover.That is why the protection of the environment is important, now, we will see now through food, air climate and other points of how the protect the environment is essential. * Everything we eat and drink comes from nature. Or any pollution ends up one day in our food: in the water we drink or what we eat. And these pollutants can cause us to develop diseases or malformations. Protect our food source is to preserve the survival and therefore the future of humanity. * The air is absolutely essential to our survival. We cannot survive more t han a few minutes without breathing.The air brings oxygen fuel cells. But breathing, we do not inhale that of oxygen. We absorb a lot of other things. With each breath, we inhale gases and particles that are in the atmosphere. Some of these gases and particles are harmful to our bodies. With each inspiration, we take a bit of poison. Breathing then puts our health at risk and makes us sick. While breathing should only be keep us alive. Protecting air quality is the health and therefore the future of humanity. * Our societies have ways of life adapted to current climate.If the climate changes, our societies will not fit there. Some regions will suffer serious disorders. According to the parts of the world, there will be a rise in the water, droughts, and floods repeated, severe storms†¦ These disasters will flee or decimate populations. People will have to move or change their lifestyle. Conflicts break out to live in areas spared. Flora and fauna will evolve with the changing c limate. Some plants will no longer be appropriate. Local agriculture will be affected. Parasites will spread to new areas, spreading disease to humans, plants and animals.We are already beginning to see that the overall temperature of the Earth increases. And this change is extremely fast. Nature will not have time to adapt. The current balance is upset. Careful not to damage the environment is to preserve the delicate balance of the Earth and therefore the future of humanity. * Biodiversity is the variety of plant and animal species in nature. All these species must be respected and preserved. But all these species are also necessary for the survival and future of man. Plants and animals can contribute to our health.For it is among the wildlife, sometimes unknown, that man has yet discovered or discovers drugs. These are also the wildlife that can help our agriculture. They can help improve performance and disease resistance of our plantations or our farms. Nature is a source of fu ture discoveries and solutions to our problems. It would be suicidal to destroy all that before they could benefit. Preserving biodiversity is to save a tank of future solutions to our problems. That safeguards the future of humanity. What can individuals do to help protect environment?Become more environmentally friendly is not as difficult as we might think. There are small things we can do every day to help reduce greenhouse gas emissions and our negative impact on the environment. Every action and every thought, action is environmentally friendly. Caring for the Earth is a responsibility, a privilege or a treat of citizens! Elements to return to the Developer in the previous section, we will see how man can help the environment. * For the food: we must therefore ensure that nature produces a water and healthy food in sufficient quantity.For this, we must avoid polluting the soil and seas. * For the air: we should not carelessly dismiss or distribution of chemicals in excess. We must be careful not to pollute our atmosphere. * For the climate: we must not reject it harmful gases or particles dangerous to life. We have to limit our impact on climate by reducing our emissions of greenhouse gas emissions. For our air emissions accentuate the natural greenhouse effect that contributes to heat our planet. For this, we must ensure in particular to limit our energy consumption. For the biodiversity: we must prevent the destruction of natural areas. We need to protect endangered species. There are also others simples way to preserve our environment. We can help reduce pollution just by putting our plastic bottles in a different tray. If we hesitate about the choice between two products, it is preferable to one with less packaging. Considering a building with 7000 employees that recycle all their waste paper for a year, this represents the equivalent of 400 cars off the roads. A simple motto: â€Å"The best waste is that it did not produce†¦ Turn off the light s behind us, turn off the computer (and monitor) when we do not have the utility, TV also, use compact fluorescent bulbs or LED the best rather than traditional bulbs. The standby power consumption (stand-by) devices using a current transformer (television, computer, halogen lamps) are not negligible and a power strip with switch can completely disconnect the devices when they are not used. Simple gestures, but very effective on our power consumption. The dryer (dryer) is not always essential.Enjoy the summer heat and high winds of autumn to dry our clothes (the sun is also the best stain remover and bleach for clothes! ). It is good not to let the water run all the time while we brush our teeth. If we have a toilet that continuously allowed flowing a little water, it may be several tens of litters of water per day. The use of modern toilets (or toilet bio litter) provides, without odor, water savings even greater and provides rewarding compost our waste. Conclusion: In fact, to lea ve for our children tomorrow, a world livable, breathable and clean, we must start early with them to make them understand.Do not throw paper wanders by, turning off lights, do not waste water. All this in 3 / 4 years children understand! And then, ourselves, have more responsible attitudes and do not always rely on others to make savings (gas and transportation, sorting, paper everywhere. Every detail is important, and drop-by-drop, we come to a Wed. References: (Reynaud, 2011), Sustainable development in the heart of the company (Managment, 2011), Management, Environmental (Milton, 2011), The environment site (Smouts, 2011), Sustainable Development (Baddache, 2011), Sustainable development on a daily basis

DNA

Long stands of double helical DNA can fit into the nucleus of a single cell because DNA is specially packaged through a series of compaction events to fit easily within cell nuclei. Even though the length of DNA per cell is about 100,000 times as long as the cell itself, it only takes up only about 10 percent of the cell’s volume. The DNA molecule, in order to condense, wraps itself around groups of histone proteins, and then the chromatin folds back on it, nucelosomes pack together to create a compact, protein-coated fiber, and the fiber coils to shorten further into an extended chromosome. Finally, the coiled fiber organizes into loops coming from a central axis, creating a condensed, X-shaped chromosome. 2.Why is a sport drink used to collect the cheek cells instead of water? Sports drink which is saline solution contains sodium chloride which makes the solution compatible with osmotic environment of the cells. The sports drink prevents the cells from breaking open and releasing their DNA before they are collected. If water was used, it would be hypotonic to the cells causing them osmosis and eventually burst. 3.What does the cell lysis solution do to the cells’ membranes? It dissolves the phospholipids bilayer of cell membrane by forming water soluble complexes with them 4.How does the DNA in the cell lysate become visible?  It becomes visible when ethanol is added. Since DNA is insoluble in ethanol, it cannot be incorporated into the liquids. Ethanol hits the cell lysate which cause the DNA to precipitate out of the solution, forming a cloud of stringy fibers at where ethanol and cell lysate meet. 5.Why can you see the extracted DNA with the naked eye?  I can see the extracted DNA with the naked

The miracle video Assignment Example | Topics and Well Written Essays - 250 words

The miracle video - Assignment Example Since Helen is unable to speak, see and hear, i would have similarly used the simple objects like water, spoon and signs to enable her learn. I would also be persistant in teaching Helen just the same way teacher Annie Suvillian did. Helens story has immensely taught me on how to make appropriate choices and on how to manage time, for example, if it were that the teacher didnt make an apprpriate solid choice to separate Helen from her parents, she would have not learnt in an appropriate environment. The teacher was also able to manage her time. The shortest period she had to teach Helen was succssful hence impresing Helens parents. I learnt that hardwork pays. Helen as a teacher was so hardworking thus making her teaching progress succssful. Obedience, Helen became obedient thus enhancing her studies. Understanding also enables someone a teacher to provide the required teaching skills. Do you think teacher Annie was right to have taken Helen away from her

Al Dunlap at Sunbeam Case Study Example | Topics and Well Written Essays - 500 words

Al Dunlap at Sunbeam - Case Study Example ct, and getting a great management team together, his restructuring turned the company around by raising share prices from $12 per share to its all-time high of $53 per share (Albert J. Dunlap 1). His shareholder-value approach to public business corporations brought huge initial gains for the corporation. The final step of the rescue plan was identified by Dunlap in his own words as an aggressive growth plan (2). This was his first attempt at growing an organization he had restructured – he had sold all other companies before. So how did the growth go? Sunbeam went from $53 per share to below $12 per share within three months – even faster than the turnaround. 1. Growth needs newly researched products, strong advertising, increased distribution channels, and a good marketing strategy. All this needs capital investment and time. Sunbeam had capital investment. What they did not have was time, as Dunlap gave only 6 months for new products to be researched and to be brought into the market. This was essentially flawed, as described by a former executive Ron Gaber from their rivals Black & Decker, who stated that most companies usually give at least a year and a half for new research products. Also, Al did not have anything in the manufacturing line to claim this. 2. Then Dunlap gave his trademark touch to growth. He took over three mediocre companies – First Alert, Coleman and Signature – and then set out to grow Sunbeam through the newly procured companies. He planned to restructure the new acquisitions (Thomas, and David 8), but that again required more time than he had. In my opinion he should have grown upon what he had rather than taking over new companies because it was similar to having all the work force and unstable factories he had just disposed of. 3. Then he stocked huge quantities of gas grills and other seasonal items, which did not sell as expected, causing great amounts of capital to be held up, required for research. This error can be

TOPIC NO 9 Essay Example | Topics and Well Written Essays - 2750 words

TOPIC NO 9 - Essay Example Factors such as culture and history are not included in the Porter’s five forces industry analysis. Because of this, the model is seen as inadequate as an environmental assessment tool. Moreover, the forces behind the model are grounded on the premise of constant returns to scale by Alfred Marshall in his ‘theory of production.’ This paper aims to discuss the changes, such as increasing returns to scale and their effect on the intensity of the forces. Factors such as culture and history and their effect on the forces are also explored. When constant returns to scale is a vital premise where Michael Porter has derived his Five Forces of the industry model, it mainly based on Alfred Marshall’s theory of production. According to Marshall’s theory of production, for a certain increase in the level of all inputs, the output will increase by the same proportion (ILSTU.edu 2009). This has been identified as the constant returns to scale. The concept of constant returns to scale has been the traditional assumption as regards the theory of production. However, changes in our times state that the concept of constant returns to scale is not always the case for production. As firms strive to build production competitive advantage in order to lead the competition, they strive to produce more outputs for a given increase in the level of the inputs, hence increasing returns to scale. As stated in Porter’s five forces: â€Å"In the traditional economic model, competition among rival firms drives profits to zero. But competition is not perfect and firms are not unsophisticated passive price takers. Rather, firms strive for a competitive advantage over their rivals. The intensity of rivalry among firms varies across industries, and strategic analysts are interested in these differences (AUEB.gr).† â€Å"[†¦] unique industry characteristics that define the industry.