Monday, February 24, 2020

Reduction Plan on Vehicle Emission in Rural Areas Term Paper

Reduction Plan on Vehicle Emission in Rural Areas - Term Paper Example The way of doing business in almost all of the industries has experienced major shifts. The effects of globalization have made the world a smaller place to live in as the citizens today have a much wider reach. The effects of globalization have literally written-off the geographical borders of the national as well as international boundaries. Such factors have invariably increased competition. On the one hand, it is true that the competition has proved beneficial for the customers as it has reduced the price and time lag but on the other hand, globalization also has many ill-effects as it increases use of machines and equipment as well as vehicles. Such increase invariably has positive contributions toward the greatest challenge of the present world like global warming. The increased purchasing power of the people contributes toward the higher standard of living. Such standards call for greater use of vehicles. And there is no doubt that the United States is one of the most developed nations of the world. Such greater usage of vehicles is not only affecting the busy city and the urban areas but also the rural counterparts of the country. Located in the mid-western region of the United States of America, Iowa is no doubt one of the prominent states of the country. As per the census of the United States, the state mostly comprises of the urban population with the figure of more than 60% as of 2000. Also, the growth in the urban population is more as it has grown by around 8% in the period between 2000 to 2008 (Iowa Data Center, n.d.). It is often perceived that the state of Iowa that is located at the heartland of the United States has agriculture as one of the major occupations for its citizens but the fact is that the main sources of occupation include manufacturing, finance, biotechnology, and government services. It can be said that the state of Iowa has a diversified economy.  

Saturday, February 8, 2020

Description Essay Example | Topics and Well Written Essays - 500 words

Description - Essay Example The trip started out smoothly and nobody felt even a tinge of tiredness. On the way to the Big Bear, we halted at Seven Eleven to grab some energy drinks and continued our trip singing out loudly. The freeway that led us to the mountain was nearly empty and the view was enchanting. We were surrounded by nature with both sides of the freeway covered with mountains and trees. As we neared the mountain, I noticed a sign board that read, â€Å"Snow Chains required beyond this point† and Highway Patrols were blocking the entrance of the mountain. Upon enquiry, they told us that as it had snowed all night the road ahead was covered with snow and ice and that we would require tire chains to move ahead. On hearing this, however, our excitement did not wean and we drove back to the city below the mountains and bought some tire chains. We then pulled over just before the blockade, to put on the chains. The weather outside was freezing cold as we got out of the car which was a black two- door coupe model with a long hood, a short trunk and big tires. I had previously encountered problems with the tires as they had a tendency to slip when the ground was wet. But now I was not worried as the snow chains looked powerful and reliable, though it was quite a challenge to fix them. After struggling with the chains for about 30 minutes, my hands began to feel cold and sensitive due to the freezing weather. The effort was in vain and we finally engaged a mechanic to fix the chains and paid him $50 for the job. Another problem also lay ahead as I had never driven on icy roads. Though I took pride in my driving skills I was a bit apprehensive at that moment. As I resumed driving, the mountain road seemed fine from where the Highway Patrols stopped us, but once we reached the first curve, the true reality of the situation dawned on us. The road ahead was completely snow covered with only a few sections of the road visible. There were curves once after every 300 feet with

Wednesday, January 29, 2020

The Same Story Essay Example for Free

The Same Story Essay Write A Detailed Comparison On The Way Of How A Tabloid Newspaper (The Sun) And A Broadsheet Newspaper (The Times) Treat The Same Story. The purpose of this essay is to write a detailed comparison based on the ways of how different newspapers present their data in order to attract custom. I will be looking closely at the presentation, content and style of a tabloid newspaper (The Sun) and a broadsheet newspaper (The Times). To enable this assessment to be fair, I will be concentrating on a particular event, which happened back in 1986. The article in which I will be focusing on is about an Arab man (Nezar Hindawi) who tried to dupe his pregnant girlfriend. The Arab had planted an explosive in the luggage belonging to his intended wife and sent her as a human time bomb to board a jet containing more than four hundred unsuspecting passengers and crew. Newspaper articles always consists of a subject heading; to attract a reader to a story, subheadings; to guide the reader through the story, and paragraph sections which contain necessary details appropriate for the clarification of the story for the reader it targets. The language and visual appearance are the key factors to the contents of a newspaper, and the editors pride themselves on a politically correct informative style of journalism, suitable for the newspaper they are promoting. The visual appearance is a very important aspect of both a tabloid and a broadsheet newspaper layout, as it has to capture the publics eye. If it fails to do this, there will be a decline in public interests and sales would decrease through loss of custom. The standards of the newspaper should be of the same quality each time it comes off the press, otherwise the public turn towards other companies. The consistency of this standard is vital to the consumer who expects a particular style. Newspaper companies often run the beginning of the story on the front page and continue it on a later page. The importance of the story is usually included in the information given on the front page. The story about the human time bomb hit the front pages of the Sun and The Times. The two companies displayed the story in extremely different ways. The Sun used most of the space on the front page for this article. The size of a tabloid newspaper is suitable to fit into small places, and it does not create the problem of folding over when being read, like a broadsheet does. The only other information featured on the page was an advertisement for the Sam Frocks Collection and another for the i 50,000 Bingo prize for that days winner. The journalists managed to fill it with a big, bold WANTED sign stretching from one side of the page to the other as well as a quarter page black and white picture of the Arab, and a twenty-one worded headline placed just above the tiny amount of text that was squashed into the bottom corner. To make the headline eyecatching the W. O. B technique was used. W. O. B is an abbreviation for White On Black. This is effective because it darkens the space around the writing enabling the words to make a dramatic appearance. This technique was used in three different places throughout the front page. It is used in the papers name appearance, the advert featured and the headline of the Arab story. In comparison, The Times displayed many of their articles on the front page. The Times is able to provide more detailed stories, as it is longer and wider than The Sun. Broadsheets are often carried under the arm, as they are too big to store in a handbag or suitcase. The Arab rat article was placed at the top of the page in a tiny space. The other information included on the page is an advertisement for Swindon Enterprise, a cartoon caption and articles such as England Down And Out, Pledge On Terror Even At Cost Of Life, Thousands Seek To Flee Tripoli. Within the space provided for this story the editor inserted a small picture of the Arab, with a caption just beneath it, a headline, a sub headline, and the text. The picture in The Times used for the article was the same picture as the editor of the Sun had used. The only difference between the two photographs is the size.

Tuesday, January 21, 2020

The Role of Climate Change in Coral Reef Destruction Essay -- Global W

Climate change is arguably one of the most discussed issues in climatic conferences and political debates across the world. Establishment of the fact that global warming is the leading cause of climate change continues to persuade people to find out ways of reducing or mitigating the effects it has on the earth. Global warming occurs naturally, but artificial causes, which are mainly human activities, contribute to this effect. The release of greenhouse gases such as carbon dioxide from human activates has led to a 0.60C rise in global temperatures (Walther et al., 2002). This implies that different life forms are affected in one way or the other given the effect of temperature on life. Different species of flora and fauna have and continue to suffer the effect of climatic changes. Coral reef is one of seawater features that have been affected by climatic changes. This has led to destruction through coral bleaching and increased mortality, especially due to the warming of the sea that causes an increase in sea water levels (Bakerl, Glynn & Riegl, 2008). An increase in global temperature also increases ocean acidification (Hoegh-Guldberg et al., 2007). These occurrences destroy reefs resulting in a significant drop in other sea organisms that depend on the reef. This implies that climatic changes are among the most destructive environmental elements affecting coral reef population in the world. To understand how climatic changes affect coral reef population, it is important to consider different ecological processes that occur due to climatic changes, the most common being the rise in global temperatures. Results from Different Studies Investigating the Role of Climate Change in Coral Reef Destruction Evidence of Sea Acidi... ...igher—Can We Do Anything About It?. National Geographic. Retrieved Nov 11, 2013: http://ocean.nationalgeographic.com/ocean/critical-issues-sea-level-rise/ Obura, D. (2005). Resilience and climate change: lessons from coral reefs and bleaching in the Western Indian Ocean. Estuarine, Coastal and Shelf Science , 63, 353–372. Obura, D. & Grimsditch, D. (2009). Coral reefs, climate change and resilience : an agenda for action from the IUCN World Conservation Congress in Barcelona, Spain. Neptune: IUCN. Smith, V. & Buddemeier, W. (1992). Global change and coral ecosystems . Annu. Rev. Ecol. Syst, 23, 89-118. Sutthacheepn, M. et al. (2013). Impacts of the 1998 and 2010 mass coral bleaching events on the Western Gulf of Thailand. Deep-Sea Research II, 96, 25–31. Walther, G. et al. (2002). Ecological responses to recent climate change. Nature, 416, 389-395.

Monday, January 13, 2020

Acl Reconstruction Graft Information

Graft report Patellar graft The patellar tendon bone-tendon-bone graft has been the â€Å"gold standard† graft choice for ACL reconstructions since it became common practice in the mid-1980. It has been used extensively by surgeons since that time and still remains the graft of choice for a high number of orthopedists who perform this surgery regularly. The patellar tendon graft has consistently demonstrated excellent surgical outcomes with a 90-95% success rate in terms of returning to pre-injury level of sports.A patellar tendon graft is harvested through a 3-4†³ long incision based just along the medial border of the tendon†¦ The middle third of the tendon 10-11 mm wide is then removed along with 2-2. 5 cm long bone blocks still apart of the tendon at each end of the graft from the tibial tubercle and the outer surface of the patella. This gives a composite bone-tendon-bone graft that has very strong insertion points of the tendon soft tissue into bone. The tensil e strength of this graft has been measured by Noyes (1984) to be about 2950 Newton’s to failure, versus the strength of an intact ACL at 2160 N.What happens to the remaining patellar tendon after a third of it has been removed? Over the course of three to four months after surgery the tendon regenerates or â€Å"grows back†. Initially it seems to overgrow into a thick, large tendon that then remodels back to a more normal contour by 12-18 months postoperatively. Surgeons have even been able to re-harvest another patellar tendon graft from the original tendon once enough time has passed for tendon reconstitution (although there's now evidence that this repaired tissue may not be as strong as normal patellar tendon tissue).Patellar tendon ruptures at the donor site are unlikely after the first few months post-op. Patellar tendon ruptures can and do occur however during the initial 6-8 weeks after surgery if the remaining tendon is stressed too hard. One of the advantages of this construct is that because the bone-tendon interface is quite strong, the surgeon only has to fix the block of bone in the bone tunnel rather than trying to fix the soft tissue itself.A headless screw is inserted next to the bone plug (like a square peg in a round hole) to interference fit and locks the bone in place. The patellar tendon fibers are thereby immediately secured and are stable enough to begin motion and weight bearing when tolerated. The ends of the graft heal bone-to-bone in around 6-8 weeks, which appears to be quicker than the healing process for soft tissue-to-bone. Interference screws are now available in a bioresorbable material that actually dissolves within the bone over 2 to 3 years.The â€Å"gold standard† graft isn't perfect, however. There may be more pain associated with this donor site than from any of the other graft choices. As a result there is sometimes a greater initial atrophy or wasting response of the quadriceps muscle compared to s ay either a hamstring or cadaver allograft. This can require more prolonged physical therapy to recover from and could possibly delay the initial return to sports. The incision (scar) is bigger, and almost all patients end up with a permanent loss of sensation 2-3†³ in size just lateral to the incision.There is a risk of patellar tendon ruptures, as well as fracturing the patella both intraoperative as well as postoperatively, although bone grafting the defect in the patella at the time of surgery has reduced the incidence of the latter. Patients who kneel a lot for a living are often unhappy with the patellar tenderness and sensitivity that can occur at the incision site and should probably consider an alternative graft choice. One of the bigger issues with patellar tendon grafts that recently has a number of orthopedists switching to alternative grafts is the incidence of anterior knee pain when patients try to resume athletic activities.Specifically there are some studies5 s howing an increased rate of patellofemoral pain and/or tendonitis of the patellar tendon with stairs, jumping, skiing and other such activities 6-12 months out from surgery. Ultimately these are often treatable with continued strengthening, rest from sports, and time, but these symptoms can delay the expected time of return to sports. In summary, the patellar tendon BTB graft is a safe and effective option for ACL reconstruction. It has a consistently successful clinical track record at all levels of athletic activity with excellent outcomes and reproducible results.Its major disadvantages are primarily increased tenderness kneeling on the donor incision site, and the possible risk of problems with patellar and patellar tendon pain upon initial return to sports. Semitendinosus Semitendinosus grafts are made with the semitendinosus tendon either alone, or accompanied by the gracilis tendon for a stronger graft. The semitendinosus is an accessory hamstring (the primary hamstrings are left intact), and the gracilis is actually not a hamstring, but an accessory adductor (the primary adductors are left intact as well).The two tendons are commonly combined and referred to as a four strand hamstring graft, made by a long piece. which is removed from each tendon. The tendon segments are folded and braided together to form a quadruple thickness strand for the replacement graft. The braided segment is threaded through the heads of tibia and femur and its ends fixated with screws on the opposite sides of the two bones. Hamstring grafts require a smaller incision and are usually less painful to harvest.Thus the initial postoperative period is often easier and more comfortable with this graft choice. Similarly, because there is no violation of the patellar tendon, there seem to be fewer problems with knee pain during the first few months that a patient is allowed to return to sports. The hamstring incision is away from the patella so patients are usually comfortable kneeli ng after their reconstruction. Because the quadriceps extensor mechanism isn't violated with a hamstring harvest there is often less initial quadriceps atrophy.With a quicker return of knee quadriceps strength some surgeons are allowing their fully recovered patients to return to sports a month or two earlier than they might for a patellar tendon BTB graft.. However there have not been any scientific studies examining the tensile strength to failure of a human ACL graft at three months after implantation that would support this approach. Certainly the animal research done on patellar tendon tensile strength in rhesus monkeys suggested that the graft was actually weakest at 3 months out before maturing at 6 months post-surgery.However the truth is that soft tissue-to-bone healing occurs at a slower rate than bone-to-bone healing. A number of surgeons are concerned that this fact is being ignored when patients are placed into an accelerated rehab without allowing extra time for the gr aft ends to begin to heal to the bone tunnels another disadvantage of hamstring tendon grafts is that harvesting them is a technically demanding procedure that requires considerable surgical experience. Pitfalls such as transecting (cutting in half) a tendon or injuring nerves or ligaments in the area of dissection are possible during the stripping process.There is also a different technique for tensioning the hamstring tendon in the knee once the femoral end has been secured. The graft needs to be pre-tensioned and it's important that each of the four graft ends be individually tensioned during the tibial fixation for best results. Allographs Another alternative available however is to use tissue from a cadaver that is called an allograft. Patellar tendon, hamstring tendon, and even Achilles tendon allografts can be used as ACL graft tissues and are inserted and fixed with the same techniques that are used for autografts.The advantages of using cadaver graft tissue are obvious; no risks, pain, or scars from the donor site. Surgical time is quicker and because there is considerably less discomfort postoperatively, the incidence of joint stiffness and atrophy of the quadriceps muscle is significantly reduced. Allografts are a good choice when there are limitations in a patient's own tissue availability. Complicated multiple ligament reconstructions needing several grafts routinely require the use of allograft tissue in addition to an autograft.Revision ACL reconstructions where an autograft has already been harvested are also an indication for using a cadaver grafts.. The biggest concern with using allografts is the risk of contracting a serious infection from the cadaveric tissue. Hepatitis and HIV can be transmitted through these tissues with potentially fatal outcomes. Bacterial infections are also a possibility and although not usually life threatening, can result in loss of the graft and cause subsequent arthritis. The dilemma with allografts is that they can't be 100% sterilized without altering or even destroying the tensile strength of the graft tissue.Imagine what happens to any food that is pressure-cooked at temperatures over 270 ° F under pressure for 10 minutes and you'll understand what happens to a patellar tendon graft sterilized in an autoclave. Similarly, radiating grafts with high enough doses to kill viruses has been shown to alter the collagen tissue and reduce the graft's tensile strength. Currently the preferred allograft treatment technique is a fresh frozen graft; the tissue is harvested, cleaned and then frozen in liquid nitrogen.The cadaver is screened extensively with hepatitis and HIV testing as well as a life style analysis to identify any high-risk behavior for these illnesses. Blood tests for HIV, however, are not infallible because they can lag 6 months between the time of infection and the conversion to a positive test. Nevertheless, the process is fairly safe and the published rate of contracting HIV f rom these tissue allografts is between 1 in 1. 2 to 2 million. There are some graft procurement companies who are able to do actual direct HIV viral testing on their tissues which lowers the risks even more.And several companies have developed proprietary cleaning techniques that they claim can guarantee sterility of their graft tissues. Some grafts are also treated with low dose irradiation (1-2 Mrads) in a compromise attempt to provide some degree of sterilization without damaging the tissue characteristics. Unfortunately there are some studies indicating that ACL reconstructions using these tissues may stretch out over time so non-irradiated grafts would be the ideal structural choice if infection were not a concern.Unlike organ transplants, allografts aren't usually at risk for tissue rejection by the host. This is because there's very little protein antigen in these washed grafts (the bone ends are completely cleansed of any marrow elements). The majority of the grafts are prim arily made up of collagen, which has very low antigenicity. Laboratory studies have shown that there is universally a low grade immune reaction to insertion of these foreign tissues, but this doesn't appear to be clinically significant in terms of achieving a successful outcome.Bone tunnel widening is sometimes seen with the use of allografts, but similar to the case of hamstring grafts, doesn't seem to have any significance in terms of functional problems. There are some early studies suggesting that allografts take longer to heal in the knee than comparable autograft tissue. At the same time the patient is recovering from the surgery quicker because of the reduced pain and morbidity of not having donated their own graft tissue. Typically allograft patients will feel like they're ready to get back into sports in just 3 or 4 months since their full strength and joint mobility are often achieved at that point.The combination of delayed allograft incorporation with an accelerated reco very can obviously spell disaster in terms of the ACL graft stretching or rupturing altogether. So patients with allografts must completely understand the healing process and comply with the temporary restrictions even though they may think their bodies are telling them it's OK to be doing more athletically. It takes a lot of mental discipline. And obviously it's a misconception that an athlete can return to sports earlier using an allograft in view of the above. The last disadvantage of allografts relates to the practical issues of cost and availability.There has been a national shortage of patellar tendon allografts due to increasing demand combined a low supply of suitably qualified cadavers. This shortage has been created in part by physicians who routinely use allografts as their first choice for ACL reconstruction grafts in spite of the fact that autograft tissues work wonderfully. Other cadaveric tissues such as hamstrings, Achilles tendons, and even anterior tibialis and pos terior tibialis tendons (some of the ankle tendons) are often being used instead of patellar tendons due to this availability issue.Some surgeons simply don't have ready access to the facilities that procure and process allografts. And allografts are expensive, running anywhere from $2000 to $10,000 depending on the tissue type and your geographic location My Choice If I needed to go into surgery for an ACL reconstruction surgery and I had to choose from one of these graft options, I would choose to go with the semitendinosus graft. I would shy away from the allograft mainly because I am uncomfortable with the whole idea of donor replacements being implanted in my body.Along with the great threat of infection the allograft also tends to be hard to obtain with a nationwide shortage of acceptable cadavers, therefore making them very expensive. When comparing the patellar graft and the semitendinosus graft its hard to find much of a difference in the results, both offer good knee stabi lity with minimal adverse effects after surgery. However, the semitendinosus graft affects a much different and less major tendon group, in return providing less knee related problems after surgery therefore giving it the advantage over the patellar graft in my eyes.

Saturday, December 28, 2019

The Manager Omnipotent or Symbolic - 865 Words

CHAPTER SUMMARY – CHAPTER 3 The Manager: Omnipotent or Symbolic âÅ"“ Contrast the actions of managers according to the omnipotent and symbolic views. âÅ"“ Explain the parameters of managerial discretion. According to the omnipotent view, managers are directly responsible for an organization’s success or failure. However, the symbolic view argues that much of an organization’s success or failure is due to external forces outside managers’ control. The parameters of managerial discretion (see Exhibit 3-1) include the organization’s culture and the environment in which the organization exists. However, these parameters don’t totally constrain a manager; managers can and do influence their culture and environment. The†¦show more content†¦The impact of a strong culture on managers is that as the culture becomes stronger, it has an increasing impact on what managers do and constrains their decision-making options as they plan, organize, lead, and control. An organization’s culture and general way of doing things are largely the result of what it has done before and how successful it has been doing things that way. The original source of the culture usually reflects the vision or mission of the organization’s founders. (See Exhibit 3-5.) Culture is transmitted to employees through stories (narratives of significant events or people); rituals (repetitive sequences of activities); material symbols (objects, facilities, and other aspects of the physical work environment); and language (special and unique terms, acronyms, and jargon). These elements help employees â€Å"learn† what values and behaviors are important as well as who exemplifies those values. Culture affec ts how managers plan, organize, lead, and control. (See Exhibit 3-6.) Current Organizational Culture Issues Facing Managers âÅ"“ Describe the characteristics of an ethical culture, an innovative culture, and a customer-responsive culture. âÅ"“ Explain why workplace spirituality seems to be an important concern. âÅ"“ Describe the characteristics of a spiritual organization. A culture that is most likely to shape high ethical standards isShow MoreRelatedThe Omnipotent View of Management1331 Words   |  6 Pagesï » ¿Summary The  omnipotent view  of management says that managers are directly responsible for the success or failure of an organization. This is a dominate view in management theory and society in general. The symbolic view of management takes the view much of an organization’s success or failure is due to external forces outside the manager’ control. 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