The Oce A Beautiful Yet Frightening Place - 2185 Words

THE OCEAN: A BEAUTIFUL YET FRIGHTENING PLACE The oceans are such a significant part of all life here on Earth. Without them, close to nothing on Earth would be alive and the entire makeup of Earth would be altered immensely. Even though all life depends on them, Kathy Kranking, a published author, notes that only around 5% of the whole ocean has been explored or seen. The â€Å"ocean† is actually made up of 5 different oceans: the Arctic, Atlantic, Indian, Pacific, and Southern oceans. It even covers almost three-fourths of the Earth’s surface. People can go swimming in it, surfing in it, boating in it, check out all of the different wildlife in it, or just enjoy it’s beauty. In order to fully understand the massive oceans of Earth, people must first understand the geography and importance of the oceans, life in the oceans, and problems in the oceans. GEOGRAPHY AND IMPORTANCE The ocean is very deep, so oceanologists have split the ocean into zones based upon water temperature and brightness of the water. These three zones include the sunlit zone, the twilight zone, and the midnight zone. Kathy Kranking, author of the article â€Å"The Ocean† writes that the sunlit zone is the shallowest of the oceanic zones, and it is between the surface and 330 feet below the surface. Of the ocean zones, the sunlit zone is the warmest and the brightest. It is home to large majority of sea creatures, even though it is much smaller than the other zones (Kranking). The twilight zone is located between

Cyberbullying It All Happens Behind A Screen - 1581 Words

It All Happens Behind a Screen Cyberbullying comes in many shapes and forms. Whether it’s receiving a threatening email or a harmful text message, Around a fourth of young individuals have reported being targets of cyberbullying. In my opinion, I find it terrible How an innocent teenager should have to go through the unthinkable. The embarrassment, the isolation, the feeling of helplessness. The victim starts to feel like they are going on a downwards spiral; A roller coaster that’s only going down. But why? All because of the horrible choices made by one person. The bully. Maybe they thought it would be funny, Or maybe they were bored. It is said that the most common reasons for cyberbullying is revenge and entertainment. Although the†¦show more content†¦Finally, I edited the rough copy and wrote the good copy of my poem. In my poem, I used a variety of devices. The first device I used was rhymes and I incorporated it into the ending of my poem. I used rhyming words to make my poem flow and sound smoother. The next device I used was an analogy and I compared cyberbullying to something more familiar, a mosquito bite, to help others understand the pain of cyberbullying. I also used a simile at the beginning of the analogy to compare the two unlike things that were used in the analogy. The analogy also created imagery. The pain of cyberbullying is not visible and may be hard to understand if not experienced first-hand, so the analogy creates imagery, allowing the reader to understand the pain. Lastly, I used an oxymoron to promote a safer and positive internet culture. Cyberbullying is bullying that is executed by using electronic methods of communication rather than communicating face to face . Through my research, I found many useful pieces of information which helped to shape my point of view. I found that the majority of people had similar opinions about cyberbullying. Most people do not support it and want to put an end to it. Mainly children from around 8 or 9 years of age until around 17 years of age are impacted by cyberbullying. Cyberbullying impacts society as a whole because it creates an unsafe environment online and individuals have to takeShow MoreRelatedCyberbullying and Psychological Mistreatment1640 Words   |  7 Pagesinsecurities are tens times more powerless against individuals impolite comments and judgments behind the screen. Subsequently, making digital harassing. violent dangers, inconsiderate remarks, psychological mistreatment behind an electronic apparatus characterizes digital tormenting. Mcquade intimates, As researchers in the field, the authors are able to provide a timely, up-to-date examination of cyberbullying. They observe that bullyin g has been around a long time but that rapid developments in communicationRead MoreCyber Bullying : Bullying And Bullying1435 Words   |  6 Pagessitting behind a computer screen, it is easy to express this and seem powerful or intimidating.. Do you not know what you are doing to others though? Research studies show that, as of 2014, over half of young people report being cyber bullied. Everyday teenagers experience a form of cyberbullying, which can be defined as, the use of electronic communication to bully a person, typically by sending messages of an intimidating or threatening nature. Sounds a lot like harassment, does it not? All statesRead MoreThe Effects Of Cyberbullying On Children And Teens1568 Words   |  7 PagesNew York Times states that cyberbullying is the use of computers, cell phones, social-networking sites as well as any other technology to threaten or humiliate another human being. It is a growing issue around the entire world that is causing many children a nd teens to experience depression, low self-esteem, and in some extreme cases suicide. Since cyberbullying is becoming more of an issue, some schools around the world have been enforcing rules to stop cyberbullying. 88% teens who use socialRead MoreOnline Bullying Is Still Bullying?1687 Words   |  7 Pagesharassment. Bullying comes in all different shapes and sizes. It doesn t matter the type of situation it is still wrong. The issue of bullying has been discussed throughout schools across the nation and most of the time it is only addresses physical, verbal and relational bullying. Cyberbullying is often forgotten, especially if a school is not up to date on all the different types of social media that it can occur on. We learn a lot of about cyberbullying and how all the posts you share are viewedRead MoreSocial Bullying And Cyberbullying1088 Words   |  5 Pagespublic. A direct effect from this type of behavior is cyberbullying. Recently, cyberbullying has become a nation-wide issue that is only getting worse. Teens feel as if they are more protected when they are behind a screen, causing them to say and post whatever their brutal minds conjure up. Those who ae victims of cyberbullying deal with emotional, mental, and physical pain on levels that people cannot begin to imagine. Not only is cyberbullying detrimental to the use of manners and polite behaviorRead MorePersuasive Essay On Cyber Bullying1623 Words   |  7 PagesThe Real Issue Bullying is no longer the big guy making a third grader give him his lunch money. In order to fully comprehend the word cyberbullying, one must understand that the definition goes into more depth than saying, kids are being mean to one another behind a phone/computer screen. With how rapidly our world is evolving, cyberbullying will not simply go away. Since being bullied online follows victims home, they have nowhere to feel safe anymore, and that can lead to obtaining mental,Read MoreBullying And Its Effects On Society1709 Words   |  7 PagesThe world today needs to understand that bullying is not something that happens just on the playground anymore where the bully stole your lunch money. Bullying has evolved just like everything else in the world. It has taken over the social network that today’s teens have seemingly become obsessed with. Social media websites such as Twitter, Facebook and Instagram allow users to insult, bully and threaten other users without any fea r of punishment. Along with the social network, bullying has takenRead MoreCyber Bullying Must Be Improved And Consistent1267 Words   |  6 Pagescyber bullied? The effects of cyberbullying are greater than many people have come to realize. Cyber bullies have been around for a long time, but technology now gives them a whole new way to get to their victims easier and faster. Cyberbullying is the use of information technology to repeatedly harm or harass other people in a deliberate manner (abouthealth). Cyberbullying happens when kids bully each other through electronic technology. The consequences of cyberbullying must be improved and consistentRead MoreBullying And Its Effect On Children1528 Words   |  7 PagesIntroduction Bullying can happen anywhere and to anyone whether it is online or in person. It can happen at school, in your neighborhood, or while your on-line. â€Å"Bullying is when someone is being hurt by words or by actions on purpose.† â€Å"Cyberbullying is using technology - internet, email, cell phones, social media, pictures - to hurt or harm someone.† It can have a major effect on the bully and the victim both. But, bullying is not just name calling, it is also teasing, spreading rumors, leavingRead MoreBullying And Its Effect On Children1533 Words   |  7 PagesBullying can happen anywhere and to anyone whether it is online or in person. It can happen at school, in your neighborhood, or while your on-line. â€Å"Bullying is when someone is being hurt by words or by actions on purpose.† â€Å"Cyberbullying is using technology - internet, email, cell phones, social media, pictures - to hurt or harm someone.† It can have a major effect on the bully and the v ictim both. But, bullying is not just name calling, it is also teasing, spreading rumors, leaving someone out

Assignment 2.2 Ratio Analysis Free Essays

Assignment 2. 2: Ratio Analysis Name| | Part 1: Enter the information based on your computations. | 2011| 2010| Benchmark| Favorable (F), Unfavorable (U), or Approximate (A)? 2011/2010| 1. We will write a custom essay sample on Assignment 2.2: Ratio Analysis or any similar topic only for you Order Now Current ratio | 3. 52| 2. 59| 2. 00| Favorable| 2. Days cash on hand| 27. 64| 18. 10| 15. 00| Favorable| 3. Days in A/R| 69. 32| 76. 59| 45. 00| Favorable| 4. Operating margin | 2. 18%| 3. 03%| 4%| Unfavorable| 5. Return on total assets | 5. 08%| 7. 13%| 4%| Unfavorable| 6. Return on net assets | 14. 54%| 17. 76%| 10%| Unfavorable| 7. Debt to capitalization| 61. 21%| 53. 69%| 50%| Unfavorable| 8. Times interest earned | 2. 47| 3. 36| 4. 00| Unfavorable| 9. Debt service coverage | 1. 28| 1. 30| 2. 00| Approximate| 10. Fixed asset turnover | 3. 28| 2. 88| 3. 00| Favorable| 11. Salary and benefit/NPSR| 84. 08%| 82. 82%| 55%| Unfavorable| 1. Current ratio = Total Current Assets in Balance Sheet / Total Current Liabilities in Balance Sheet 2011| 2010| $54,306/$15,425| $39,715/$15,315| 3. 52| 2. 59 | 2. Days Cash on Hand = Cash and Cash Equivalents from Balance Sheet / [(Total Expenses – Depreciation – Provision for Bad Debts in Statement of Operations) / 365] 011| 2010| $12,102/[($168,232 – $6,405 – $2,000)/365]| $6,486/[($138,394 – $5,798 – $1,800)/365]| $12,102/[$159,827/365]| $6,486/[$130. 796/365]| $12,102/437. 88| $6,486/358. 34| 27. 64| 18. 10| 3. Days in A/R = Net Patient Accounts Receivable in Balance Sheet / (Net Patient Service Revenue in Statement of Operations / 365) 2011| 2010| $28,509/($150,118/365)| $25,927/$123,565/365)| $2 8,509/411. 28| $25,927/338. 53| 69. 32| 76. 59| 4. Operating margin = Operating Income from Statement of Operations / Total Revenues in Statement of Operations 2011| 2010| 3,747/$171,979| $4,330/$142,724| .0218 x 100| . 0303 X 100| 2. 18%| 3. 03%| 5. Return on total assets = Net Income in Statement of Operations / Total Assets in Balance Sheet 2011| 2010| $7,860/$154,815| $8,206/$115,101| .0508 x 100| . 0713 x 100| 5. 08%| 7. 13%| 6. Return on net assets = Net Income in Statement of Operations / Net Assets in the Balance Sheet 2011| 2010| $7,860/$54,068| $8,206/$46,208| .1454 x 100| . 1776 x 100| 14. 54%| 17. 76%| 7. Debt to capitalization = Long-term Debt in Balance Sheet / Long term debt + Net Assets in Balance Sheet 2011| 2010| 85,322/($85,322 + $54,068)| $53,578/($53,578 + $46,208)| $85,322/$139,390| $53,578/$99,786| .6121 x 100| . 5369 x 100| 61. 21%| 53. 69%| 8. Times interest earned = (Net Income + Interest) in Statement of Operations / Interest in Statement of Operations 201 1| 2010| ($7,860 + $5,329)/$5,329| ($8,206 + $3,476)/$3,476| $13,189/$5,329| $11,682/$3,476| 2. 47| 3. 36| 9. Debt service coverage = (Net Income + Interest + Depreciation) in Statement of Operations/ Interest + Principal Payments ($10 million assumed for this assignment) 2011| 2010| ($7,860 + $5,329 + $6. 05)/$15,329| ($8,206 + $3,476 + $5,795)/$13,476| $19,594/$15,329| $17,477/$13,476| 1. 28| 1. 30| 10. Fixed asset turnover = Total Revenues in Statement of Operations / Net Property and Equipment 2011| 2010| $171,979/$52,450| $142,724/$49,549| 3. 28| 2. 88| 11. Salary and benefits as a % of net patient revenue = Salaries and Benefits in Statement of Operations / Net Patient Service Revenue in Statement of Operations 2011| 2010| $126,223/$150,118| $102,334/$123,565| .8408 X 100| . 8282 x 100| 84. 08%| 82. 82%| Part 2: Type your memo to senior management below How to cite Assignment 2.2: Ratio Analysis, Essay examples

Rrl of My Classmte as Example Essay Example

Rrl of My Classmte as Example Essay Various eye problems have been associated with overexposure to sunlight. CAUSE Ultraviolet Ray WHY? People are unaware of what UVR can cause to their vision/eye sight. WHY? Insufficient spread of information to the public. Sub Problem How can we completely inform the public about the dangers caused by the UVR? INTRODUCTION Another radiation from the sun can harm not only your skin but also your eyes. Extended exposure to the sun’s UV rays has been linked to eye damage, which includes the cataract that clouds the eye’s natural lens that can cause to temporary vision loss. The purpose of this project is to make the public aware of what UV ray can cause to their vision. To protect the eyes from harmful solar radiation, sunglasses should block 100 percent of UV rays. A good quality of sunglasses such as Ray-Ban is a certified item for consumption that manufactures variety of glasses and likewise lenses that deals with overexposure to sun. This variety of lenses indicates the amount of protection it can give to the eyes. It includes the tints in the lenses that keep UV ray from reaching the eyes. Manufacturers add certain colors that block UVB light. We will write a custom essay sample on Rrl of My Classmte as Example specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Rrl of My Classmte as Example specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Rrl of My Classmte as Example specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Amber and brown tints are especially useful at absorbing UV light; however, any light-blocking tint will help prevent eye damage. Manufacturers either use colored glass or polycarbonates to make these lenses or soak polycarbonate lenses in a tint solution. Sunglasses can also have extra UV coating, although these arent necessarily just for sunglasses, as the coatings are clear and can be applied to regular glasses. The best tint for optimizing performance is a matter of personal preference. Sunglasses labeled UV-400 should offer good protection from the sun. One easy way to keep your eyes protected is to remember to push your sunglasses up on your nosethe closer the lenses are to the eye, the more protection you get. If youre going to be in a high-sun environment, wrap-around shades are a good choice. REVIEW OF RELATED LITERATURE Most people know of the dangers of the sun to our skin. But many do not know that too much sun can also damage the eyes. Eyes are sensitive instruments which can easily become injured or diseased from exposure to sunlight, because of the ultraviolet (UV) rays of the sun. Ultraviolet rays are high energy, and are invisible to the human eye because they are outside the spectrum of colors that a human eye can see. Eye diseases are associated with exposure to sunlight Exposure to sunlight can cause damage to the eyes in both the short and long term. In the short term, exposure to sunlight can result in: * Mild irritation: May cause symptoms such as excessive blinking, swelling or difficulty seeing in strong sunlight. * Photo Keratoconjunctivitis: Photo keratoconjunctivitis is a condition similar to snow blindness or welders flash burn. It occurs when the sensitive, skin-like tissues of the eyeball become sunburnt. Individuals suffering from the condition are likely to experience severe pain, and possibly temporary blindness, for 12 days. The condition is temporary and will resolve naturally. In the long term, exposure to sunlight is associated with a range of eye diseases, including: * Eye cancer (also known as squamous cell carcinoma of the eye): A rare condition characterised by the growth of cancerous cells on the surface of the eye. The World Health Organisation (WHO) estimates that5070% of eye cancers around the world are caused by sun exposure. The risk of developing eye cancer increases with lifetime exposure to sunlight. The incidence is highest in countries closest to the equator. * Cortical and posterior subcapsular cataract: Cataracts are characterised by the increasing opaqueness of the lens of the eye. It can lead to impaired eye sight and, in severe cases, to blindness. The WHO estimate 5% of cortical cataract disease is caused by sun exposure. In Australia, the Australian Cancer Council estimates that up to 10% of all cataracts are associated with excessive sun exposure. A study of a United States population found that individuals who had high levels of sun exposure were about 1. 5 times more likely to develop cortical or posterior subcapsular cataracts than those who had low sun exposure, while those with moderate sun exposure were about 1. 2 times more likely to develop each of these types of cataracts. * Pterygium: Pterygium is characterised by a fleshy growth on the eyes surface. The WHO estimates that 4070% of the global burden from this disease is attributable to sun exposure. A study conducted in Victoria reported that 43. 6% of pterygium cases were attributable to sun exposure. * Age related macular degeneration: Based on laboratory studies showing thatUV rays cause retinal damage in rats, scientists believe that exposure to UV rays contributes to the degeneration of eyesight which occurs naturally with ageing. How UVR Impacts the Eye The various tissue layers of the eye absorb the wavebands of UVR to different extents. The longer the wavelength, the deeper the penetration of ocular tissue. Of the radiation from sunlight, UV-B has the greatest impact on the eye. Overexposure can result in photokeratitis or, in rare cases, solar maculopathy. Studies show that chronic exposure to UV-B can also cause cortical cataracts. UV-A is considered a greater threat to produce skin cancer than damage the eye. While the ozone layer filters UV-C from the sun, a welders arc can generate toxic dosages of this potent waveband. Since UV-C is the shortest waveband of the ultraviolet spectrum, the corneal epithelium will absorb it. A welders flash burn therefore will cause a punctate epitheliopathy. Environmental factors and UV exposure The level of UV radiation varies due to a range of environmental factors,including: * Time of day: UV radiation levels are highest when the sun is higher in the sky (in the middle of the day, between 10am and 2pm). * Geographic location: UV radiation levels increase with increasing proximity to the equator, and increasing altitude. * Cloud cover: UV radiation levels are higher when there is no cloud cover, although UV radiation from the sun is present even on cloudy days. Features of the surrounding landscape: As UV radiation from the sun is reflected more or less effectively by some surfaces than others, exposure to UV radiation is also influenced by features of the surrounding landscape. Snow is a particularly reflective surface, and as much as 80% of UV radiation will be reflected back (compared to about 10% for water and grass). Dry beach sand reflects about 15% of UV radiat ion, while the foam in sea water reflects 25% of UV radiation. * Ozone protection: A layer of ozone forms a protective layer around the earth and blocks much of the sun’s harmful rays, including much UV radiation. Ozone levels vary between places and times of the day. The origin of UV protection Most of the UV protection comes from the lenses of UV protection sunglasses. Special coatings on the lenses material during manufacturing are the origin of UV protection. The exact lens coating is named UV treatment, which adds this capability to regular lenses. Always select UV protection sunglasses with labels specifying UV absorption up to 400nm, which is equivalent to 100% UV absorption. Color, style and cost have no direct help in offering sunlight protection. Many people would think that lens color is closely related to the degree of UV protection the lenses can offer. A classical example is dark sunglasses which had dominated the sun wear industry for many years. In fact, lens darkness does not determine directly the UV filtration ability. It is the lens material and additive coating that matters. Measuring Ultraviolet Rays In the United States, the risk for UV exposure is measured using the UV Index. Developed by the NWS and EPA, the UV Index predicts each days ultraviolet radiation levels on a simple 1 to 11+ scale. In addition to publishing the UV Index daily, the EPA also issues a UV Alert when the level of solar UV radiation that day is expected to be unusually high. UV Protection Recommendations| UV Index| Risk Level| Recommendations| 2 or less| Low| 1. Wear sunglasses. 2. If you burn easily, use sunscreen with an SUN PROTECTION FACTOR of 15+. | 3 5| Moderate| 1. Wear sunglasses. 2. Cover up and use sunscreen. 3. Stay in the shade near midday, when the sun is strongest. | 6 7| High| 1. Wear a hat and sunglasses. 2. Cover up and use sunscreen. 3. Reduce time in the sun between 10 a. m. and 4 p. m. | 8 10| Very high| 1. Wear a hat and sunglasses. 2. Cover up and use sunscreen. 3. Minimize sun exposure between 10 a. m. and 4 p. m. | 11+| Extreme| 1. Wear a hat and sunglasses. 2. Apply sunscreen (SPF 15+) liberally every two hours. 3. Try to avoid sun exposure between 10 a. m. and 4 p. m. | | How do you protect your eyes from UV radiation? Protecting the eyes from UV radiation from the sun is the only way to reduce the risk of eye damage. Staying out of the sun at all times is impossible, so it is important that you know how to protect your eyes when they are exposed to sunlight, and about the times at which the suns rays are most dangerous. Steps for protecting against exposure to UV radiation from the sun include: Wear sunglasses when exposed to sunlight Every time an individual goes out in sunlight, they shouldwear sunglasses that meet the Australian standards. Sunglasses provide a barrier between UV radiation and the eyes,thus preventing the harmful effects of UV radiation. The Australian Cancer Council recommends that individuals wear sunglasses with wrap-around (i. e. side) protection complying with Australian Standard AS/ANZ 1067:2003 (these standards outline how manufacturers should make sunglasses and which materials they should use). Sunglasses which meet the Australian Standard will be labelled with AS/ANZ 1607:2003 and a category number. In addition, the lenses of the sunglasses should offer a high level of UV protection, and be labelled UV400, or EPF9 or 10. Wear a broad-brimmed hat when exposed to sunlight A hat with a broad brim offers better protection than a cap, as it also blocks sunlight from the side and back. Such a hat can effectively block about 40% of UV rays from reaching the eye. It not only protects the eyes from exposure to sunlight, but also the ear, neck and face. Exposureat these sitescan increase the risk of cancer. Avoid exposure to sunlight as much as possible, particularly in the middle of the day Levels of UV radiation in sunlight are highest in the middle of the day (10am to 2pm), and thus exposure to sunlight is most dangerous at this time. Limit your exposure to sunlight at this time by staying indoors, wearing protective clothing or using shaded areas. Sit or walk in the shade The shade provided by trees and canopies does not offer full protection against UV radiation, but staying out of full sunlight does offer considerable protection against UV rays. Seek shady areas when outside, particularly when outside for extended periods or in the middle of the day. Avoid indoor sun tanning lamps Indoor tanning lamps emit UV radiation and can cause damage to the eyes and skin. Avoid indoor tanning if you wish to protect your eyes from their damaging effects. It is also important to realise that childrens eyes are susceptible to damage from UV exposure (even though this damage may not produce symptoms until they reach adulthood). In order to protect childrens eyes, parents and guardians should provide children with appropriate protective eyewear and a broad-brimmed hat, and limit their exposure to unlight, particularly in the middle of the day. When to Wear Sunglasses? Wear sunglasses outdoors, particularly in the following circumstances: * During summer: The level of UVR at noon in summer can be more than three times as high as in winter. More importantly, the levels of UVB, the type of UVR that causes the most damage, can be as much as ten times higher (which is why sunburn takes such a short time in summer). * Around noon: (1PM during daylight saving). Seventy percent of the harmful UVB radiation that is received each day occurs within three hours either side of this time. On the beach or boating: There are usually few buildings or structures to block the sun or sky, so people are exposed to direct and scattered radiation from the whole sky as well as reflections from water. * Skiing at high altitude: Solar UVR increases with altitude and at 2000 metres (typical of Australian ski fields) can be as much as thirty percent higher than at sea level. The high reflectivity of snow worsens the problem, so that the UVR dose to the eye can be quite large. Consequently, good eye protection while skiing is very important. Materials and coatings of sunglass lenses Currently, there is a wide variety of materials for sunglass lenses. Thanks to the advancements in the lens technology, different people can now choose lenses that cater individual needs. In general, sunglass lenses are made of either plastic or glass. Plastic lenses are lightweight and come in different tints. Plastic sunglass lenses can block 80% of UV rays and thus provide good protection from sunlight. While offering excellent optical quality, glass lenses are more susceptible to scratches. High index lenses High index lenses are made of the material of high index plastic. This kind of lenses can block out 100% harmful UV rays in the sunlight. In regular, high index lenses are applied with reflective coating. This is because the high index feature also increases lens reflection on the surface. Due to the valuable optical feature of this material, high-index lenses are thinner and thinner than regular plastic lenses. Typically, lenses made of a high-index plastic can be 50% thinner than traditional plastic lenses. Patients with a severe refractive error are perfect target users. Polycarbonate lenses Polycarbonate lenses are one of the most common types of sunglass lenses. Besides features such as lightweight and shatter-resistance, polycarbonate lenses provide natural 100% UV protection. These lenses are perfect for active adults and children. Sunglasses using polycarbonate lenses can offer incomparable eye protection and UV protection. Photochromic lenses Photochromic lenses can provide appropriate lens darkness according to the surrounding environment. This type of lens always flatters people who need to frequently alternate between indoor and outdoor environments. Without the availability of photochromic glasses, vision impaired patients need to remove sunglasses and change to prescription eyeglasses when they move indoors, or vice versa. Polarized lenses Polarized lenses are specially designed for outdoor wear. These lenses can greatly reduce glare by blocking light reflection on a flat surface. Regular participants of outdoor activities including driving, golfing and skiing can significantly benefit from polarized lenses. With the help of polarized sunglasses, the wearers will nearly be free from annoying glare. Aspheric lenses Aspheric lenses are particularly suitable for people with a heavy prescription. With an evenly distributed thickness, this type of lenses will not bring an unwanted look because of excessively thick lenses. These lenses have different curves and are able to reduce or eliminate spherical aberrations. And they also help reduce the distortion of the wearer’s eyes. Scratch-resistant coating In addition to different lens materials, there are still types of coatings. In order to avoid scratches, sunglass lenses can be treated with a scratch resistant coating (SRC), which is usually included in polycarbonate and high index lenses by default. This lens coating is especially helpful for mischievous kids who may frequently drop the glasses. Anti-reflective coating Another common coating is anti-reflective coating (ARC), which is applied in some lenses in order to reduce reflective rays. While eliminating unwanted glare during outdoor activities, lenses with this type of coating are more likely to scratch. Actually, these two types of coatings are mutually exclusive, which means one specific lens cannot have both of them. Lens tints Lens tint is another common issue. With various tint options, sunglass wearers can choose their favoritecolor in order to get distinctive looking. However, only plastic lenses can effectively and uniformly absorb tints. In contrast to high index lenses, polycarbonate lenses are harder to tint. Reference http://www. mydr. com. au/skin-hair/eyes-in-the-sun

birth and death of a star essays

birth and death of a star essays The night sky, unimaginably deep, is a breathtaking sight. Some three thousand stars can be seen with the naked eye, twinkling points of light that have inspired the human spirit since the dawn of time. Study of the stars, based on data collected from visible-light telescopes, radio telescopes, and detectors wavelengths can now reveal extraordinary amounts of information: size, temperature, chemical composition, internal structure, distance and rotation rate, among other factors. One of the most important discoveries that scientists and astronomers have made is mapping out the life cycle of a star. Little by little, they have discovered all the different stages of a star; from its birth to its eventual death. As giant molecular clouds orbit the center of a galaxy, they are tugged by gravitational and magnetic fields. How fast their constituent particles move depends on their temperatures: the colder the cloud, the slower the particles. Fast moving particles resist collapsing together, and so stars can form only in the dense cores of cold clouds. Typically, these clouds are only about 15 degrees above absolute zero. Periodically, the clouds begin to collapse. The trigger mechanisms for such collapses are thought to be collision between giant molecular clouds or entry onto galactic spiral arms. Both of these occurrences set up compression waves within the cloud, which cause isolated regions to become so dense that gravity overwhelms all other processes and the could collapses. These isolated regions can often contain enough mass to create several hundred stars of similar mass to the sun. They are known as Barnard objects, and often appear as black regions in front of stars. Sometimes regions with emission nebulas reach the appropriate density and collapse. These appear as round, black bubble within the glowing gas. They are referred to as Bok globules. As Barnard objects and Bok globules collapse, isolat...

Learn the Pros and Cons of Ethanol and Its Production

Learn the Pros and Cons of Ethanol and Its Production Ethanol is simply another name for alcoholthe liquid made from the fermentation of sugars by yeasts. Ethanol  is also called  ethyl alcohol  or  grain  alcohol  and is abbreviated as EtOH. In the context of alternative fuels, the term refers to an alcohol-based fuel that is blended with gasoline to produce a fuel with a higher octane rating and fewer harmful emissions than unblended gasoline.  The chemical formula for ethanol is CH3CH2OH. Essentially, ethanol is ethane with a hydrogen molecule replaced by a  hydroxyl radical,OHwhich is bonded to a  carbon atom. Ethanol Is Made from Grains or Other Plants No matter what it is used for, ethanol is produced by processing  grains such as corn, barley, and wheat. The grain is first milled, then fermented with yeast in order to transform the grains starches into alcohol. A distillation process then increases the ethanol concentrations, such as when a liquor distiller refines whiskey or gin through a distilling process. In the process, waste grain is produced, which is usually sold as livestock feed. Another by-product, the carbon dioxide produced,   can be used in other industrial applications.  Another form of ethanol, sometimes called bioethanol, can be made from many types of trees and grasses, although the fermentation and distilling process is more difficult. The United States produces close to 15 billion gallons of ethanol a year, mostly in states close to large-scale corn growing centers. The top producing states are, in order,   Iowa, Nebraska,   Illinois, Minnesota, Indiana, South Dakota, Kansas, Wisconsin, Ohio and North Dakota. Iowa is by far the largest producer of ethanol, producing more than 4 billion gallons a year.   Experiments are underway on the possibility of using sweet sourgum as a source of fuel ethanol, which can be grown with only about 22% of the irrigation water required for corn. This may make sourgum a viable choice for regions with water shortages.   Blending Ethanol with Gasoline Blends of at least 85 percent ethanol are considered alternative fuels under the Energy Policy Act of 1992. E85, a blend of 85 percent ethanol and 15 percent gasoline, is used in flexible fuel vehicles  (FlexFuel), which are now offered by most major auto manufacturers. Flexible fuel vehicles can run on gasoline, E85, or any combination of the two. Blends with more ethanol, such as E95, are also premium alternative fuels. Blends with lower concentrations of ethanol, such as E10 (10 percent ethanol and 90 percent gasoline), are sometimes used to increase octane and improve emissions quality but are not considered alternative fuels. A good percentage of all gasoline sold now is E10, containing 10 percent ethanol.   Environmental Effects A blended fuel like E85 produces less carbon dioxide, the single most important greenhouse gas responsible for climate change. In addition, fewer volatile organic compounds are emitted by E85.   Ethanol  is not without its environmental risks, however, because when burned in internal combustion engines, it produces significantly more formaldehyde and other compounds that can increase ground levels of ozone.   Economic Benefits and Drawbacks Ethanol production supports farmers by offering subsidies to grow corn for ethanol, thereby creating domestic jobs. And because ethanol is produced domestically, from locally grown crops,   it reduces U.S. dependence on foreign oil and increases the nation’s energy independence On the flip side, growing corn and other plants for ethanol production requires a lot of farmland, monopolizing fertile soil which instead could be used to grow food that might feed the worlds hungry. Corn production is especially needy in terms of  synthetic fertilizer and  herbicide,  and it frequently leads to  nutrient  and  sediment pollution. According to some experts, the production of corn-based ethanol as an alternative fuel  may end up requiring  more energy than the fuel can generate, especially when counting the high energy costs of synthetic fertilizer production.   The corn industry is a powerful lobby in the U.S., and critics argue that corn-growing subsidies are no longer aiding smaller family farms, but are now mostly of benefit to the corporate farming industry. They argue that these subsidies have outlived their usefulness and perhaps should be spent on efforts that more directly affect the public welfare.   But in a world of dwindling fossil fuel supplies, ethanol is an important renewable alternative which most experts agree has virtues that outweigh its drawbacks.

Aviation Strategy Assignment Example | Topics and Well Written Essays - 2500 words

Aviation Strategy - Assignment Example The ongoing rivalry between the two players in the aviation sector became the focus of many research studies and economic debates. The end of the monopolistic era of Boeing was seen as a turning point in the history of aviation since Airbus changed the rules of the game that was so far dominated by the supremacy of Boeing. The demand for new aircrafts is directly proportional to the estimated demand in the commercial aviation sector. The strategic perspectives of aircraft manufacturers focus on the estimated demand and growth potentials that can trigger the demand for aircrafts. The improvement in seating capacity has now emphasized the significance of long haul services in improving market shares and revenues for airlines operators. Both Boeing and Airbus have contradictory views on this perspective. While Boeing focuses on point to point services, Airbus believes in the hub-to-hub strategy. The viability and potentials of each of these strategic options are examined through this pa per to provide a deeper insight into the strategic dimensions of both Airbus and Boeing. The paper explores these perspectives and analyses the strategic planning of these two players to provide conclude on the viability and future of the long-haul market. Organizational vision and strategic perspectives The Boeing Airbus has got two visions for its operations with the Boeing787 operate from point to point and the bigger airbus A380 having a hub to hub strategy. Boeing787 was quite successful with their strategy of point to point where their strategist were of the idea that passengers do not want to travel from hub to hub and will always prefer a nonstop direct flight to their respective destination. It is true that passengers from secondary cities have to travel more as they do not have a direct flight where they stop over in some transit hub and then proceed to their destination. This means that the cost is more both for the passenger and the aircraft company as they have to trave l more and incur more expenditure. The success of Boeing787 was based on the strategy of travelling point to point from where they got a huge response with passengers opting for them as they had the convenience of reaching their destination at the shortest possible time and within affordable rates. Boeing had a second school of thought where the aircraft manufacturing giant came up with the Airbus A380 which was bigger aircrafts with more space, more passengers but operating on a hub to hub basis. The strategists for the Airbus A380 were of the view that bigger aircrafts would have the space and the higher capacity to take in more passengers which means more business at reduced costs. There is a 10-15% reduction in costs per seat in the Airbus A380 which is of principal two reasons. One is for the technologies being used for the airbuses were the aerodynamic performance has increased along with the engine performance which has a direct effect on the fuel consumption which has been r educed considerably. Second is the bigger the space of the aircraft, more the number of passengers and seats can be accommodated whereas the cabin crew, pilots and maintenance costs remains the same. Apart from the cost factors, the airbuses operate from hub to hub. The principal reason to do that is the airbus A380 travels long distances and operating from hub to hub is a better option. The second factor on its strategy list is that given the size of the aircraft, the aircraft terminals needs to be modified with runways and the boarding bridges, luggage handling etc comes into the picture which is generally not available in the smaller airports. Therefore the operation strategy of the Airbus A380 is always suited for the