Saturday, January 18, 2020
Adults and Children Essay
A gated community is a type of residential community that upholds privacy and exclusivity. Residential houses within gated communities are bounded within limited proximities that are bordered by walls, gates, fences, and such. Access or entrance to gated communities is highly restricted not only for pedestrians, but also to various types of transportation as well. Within gated communities, residents are provided with services or amenities that are exclusive only to them. Sometimes, gated communities adapt the concept of larger communities by providing services and amenities that will allow residents to enjoy a comfortable home and lifestyle within the bounds of the area. Large-scale and highly private or exclusive gated communities even provide small to medium sized shopping centers, recreational facilities, food and dining centers, and such that enables residents within it to enjoy daily living tasks and activities comfortable within its proximities. (Blandy & Lister, 287) The purpose of establishing gated communities is to provide the community with safe and secure housing opportunities for individuals allowing them to experience a peaceful and relaxed home environment. Security systems established within gated communities for limit access from non-residents ensure individuals that the area is sheltered and guarded from criminal activities. (McGoey) Another objective for the establishment of the concept of gated communities is to allow residents to control or manage the community or environment they live in by granting them the power or authority to supervise roles or activities within it. Gated communities are guarded by appointed security officers, but it is usually managed by a Homeownerââ¬â¢s Association ââ¬â a group or organization which handles everything that has something to do with living within the gated community. The owners of the properties within the gated community gather and elect leaders who will be in charge of overseeing all needs, problems, concerns, and other issues that might require urgent attention and resolutions. In addition, gated communities also serve as housing facilities that promises to provide residents with the best quality of life by offering unlimited access to fun, entertainment, and privacy. For instance, some large-scale gated communities have golfing areas that are accessible only to residents. Residents are allowed to play within the golfing areas without any limitations. (ââ¬Å"Explore Gated Communities! â⬠) Due to the benefits and advantages of living in gated communities, some discussed previously, it has become a major trend in modern housing. (ââ¬Å"Explore Gated Communities! â⬠) However, although the positive attributes or aspects of gated communities have been discussed, there seems to be some issues raised on its influence or effect to the behavior and lifestyle of adults and children who live within and outside the community. Adults and children who live in and outside gated communities acquire both positive and negative qualities and perspectives from the context or dimensions of walled housing arrangements. The effects of living within gated communities vary from emotional and psychological, to moral and social influences. The remainder of this paper will discuss how the behavior and lifestyle of adults are influenced by the structure of gated communities. In terms of the relationship between adults and children, living within gated communities allows parents and older members of families to feel at ease with the whereabouts of their children within the community. The focus of gated communities on providing safe and secure home environments ensure parents that their children are safe without their close supervision as long as they stay within the confines of the gated community. (Le Goix, 2003) This helps them to focus on other urgent things or concerns as they feel no worries or stress regarding the safety of their children. On the other hand, parents who live outside gated communities feel the worry and stress due to the relocation or concentration of criminal activities outside the walls of gated communities. Since the difference between gated communities and the public is most observable in terms of safety and security measures, the distinction between these two kinds of communities gives way to the unequal division or distribution of criminal activities within the entire community. Criminal activities will converge on areas neighboring non-gated communities. (ââ¬Å"Diagonal Mar ââ¬â A Gated Community,â⬠) This concern allows parents to feel worried or stressed about the safety of their children leaving them deeply involved with ensuring that they keep them protected at all times.
Friday, January 10, 2020
The invasion of a new world: Aztecs and Avatars
Could the very large and powerful blue creatures of Pandora have similarities with the ancient civilization of the Aztecs? Yes, they have many similarities, not in terms of culture or lifestyle like one might think. Rather, both these civilizations share one identical aspect of their history, they were both invaded by an unknown, foreign mass of people. These two invasions have many similarities between each other but the three most prominent are, a completely unknown group of people coming to their land, invasion resulting in violence and desire for a specific object.In February 1519 the Spaniards embarked on a conquest led by Hernan Cortez. Cortez brought many warriors to this new world they were about explore. When the Spaniards reached the new world they were absolutely astonished, they had never seen anything remotely like it, they didnââ¬â¢t know such things existed! As the Spanish conquistadors journeyed inland, they reached the enormous capital city of Tenochtitlan. The no rmal custom of the Aztecs is to capture all foreign invaders and sacrifice them but the Aztecs showed mercy to the Spaniards and treated them as guests. With the arrival of Cortez, the Spaniards were overwhelmed at the new world they had found and the potential it could have for gold.On the other hand the Aztecs were overjoyed because they thought the new conquistadors were gods they had been awaiting. Similar to the Spaniards arriving in present day Mexico, the humans that invaded Pandora acted in a similar way. Aside from the scientists who studied the avatars, the humans on Pandora knew very little about how they acted or what their culture was. In general, the Aztecs and the Avatars reacted the same way to to the foreign invaders, astonished and curious.Although the Aztecs and Spaniards were getting along peacefully, that peace was about to come to a stop. Over time the Aztecs realized the the conquistadors were not gods. The Spanish now feared they could not get out of the city , alive at least. The Aztecs eventually let the Spanish leave with no harm but the conquistadors wanted the gold they came for. After freeing the Spanish, Cortez led an attack on the Aztecs. Many battles were fought between the Spaniards and Aztecs totalling hundreds and thousands of deaths.Like the battles the spaniards and Aztecs endured, the Avatars also fought with great numbers against the humans. After the humans destroyed the mother tree, which all the Navi lived in and worshiped, the Avatars decided to fight for their land. The Navi gathered as many tribes that were willing to fight and took on the humans full force. Just as the Aztecs had ââ¬Å"home field advantageâ⬠, the Avatars also had the advantage of knowing the terrain better than the enemy. Another similarity was the fact that the humans and spaniards had a massive edge with their use of guns. If not for the weapon technology the Aztecs most likely would have beaten the Spaniards.The last similarity is that bot h invaders desired a mineral. In the Spaniards case it was gold, for the humans it was unobtanium. When the Spaniards first set sail to the new and unexplored world they had one thing on the mind, gold. They would do anything that was necessary to bring home wealth to Spain. The same mindset applied to the humans, the primary reason for being on Pandora was to mine up as much unobtanium they could find. With all the greed that filled the minds of the invaders, they had no respect for the native peopleââ¬â¢s land. The primary cause of the violence on both occasions was the lack of consideration for the nativeââ¬â¢s homes.This essay described the similarities between the invasions of the Avatar and Aztecââ¬â¢s homeland. When one mass of people invades land belonging to someone else, there tends to always be tension and violence, this was evidenced in both these occasions. Espero que hayas disfrutado el ensayo!
Thursday, January 2, 2020
The Ford, Firestone, And The Financial Corporations On...
1. Based on the information presented in the PBS documentary and the TIME article, describe how the behaviors of corporations, such as Ford, Firestone, and the financial institutions on Wall Street, could or should be understood as crime whether or not they have been prosecuted? How do these activities differ from those involved in ââ¬Å"typicalâ⬠street crimes? I believe that the behaviors of the Ford, Firestone, and the financial corporations on Wall Street were considered criminal behaviors. There was sufficient evidence against these corporations. Apparently, the prosecutors could not prove criminal intent in their behaviors; however, in the case of the financial institutions on Wall Street, you cannot have millions of loans bought and sold that clearly do not meet the standards of a ââ¬Å"good loanâ⬠. Additionally, it seems utterly irresponsible for the executive banking institutions to not be aware of these loans not meeting the standards for all of the years they were being bought and sold. I believe knowing this information proves criminal intent because no further action there was taken to prevent these loans from being bought and sold without regulation. The same can be applied to the Ford and Firestone corporations. These institutions put the SUV out on the market being aware about the engineering issues and the possible fatalities it could cause. These activities differ in street crime because they very theoretical. There is no direct association between the crime andShow MoreRelatedFirestone and Ford: the Tire Tread Separation Tragedy5367 Words à |à 22 PagesCase 30 Firestone and Ford: The Tire Tread Separation Tragedy I t is often tricky to know when an ethical or social issue really begins. Does it begin before it is ââ¬Å"recognizedâ⬠or ââ¬Å"identifiedâ⬠as an issue? Does it begin when an isolated manager recognizes an incident or a trend and reports it via a memo to his superiors? Does it begin once the media get hold of information and the frenzy begins? Such questions arise in the case of the Firestoneââ¬âFord tire tread separation debacle that began dominatingRead MoreMarketing Mistakes and Successes175322 Words à |à 702 Pagesper-copy fee to the Copyright Clearance Center, Inc. 222 Rosewood Drive, Danvers, MA 01923, website www.copyright.com. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley Sons, Inc., 111 River Street, Hoboken, NJ 07030-5774, (201)748-6011, fax (201)748-6008, website http://www.wiley.com/go/permissions. To order books or for customer service please, call 1-800-CALL WILEY (225-5945). Library of Congress Cataloging in Publication Data HartleyRead MoreCrisis Management - Case Study6562 Words à |à 27 Pagesthreat to operation that can have negative consequences if not handled properly. It can create three related threats 1) Public safety 2) Financial loss 3) Reputation loss. It damages the organization in terms of finance. The primary concern in a crisis has to be public safety. If failure to address public safety intensifies the damage from crisis reputation and financial concern are considered after public safety has been remedied. Barton (2001), Coombs (2007a), and Fearn ââ¬âBanks (2001) have noted howRead MoreManaging Global Expansion7295 Words à |à 30 PagesCOPYRIGHT 1989 JAI Press, Inc. (Hide copyright information)Copyright [pic] There are at least five reasons why the need to become global has ceased to be a discretionary option and become a strategic imperative for virtually any medium-sized to large corporation. 1. The Growth Imperative. Companies have no choice but to persist in a neverending quest for growth if they wish to garner rewards from the capital markets and attract and retain top talent. For many industries, developed country markets are quiteRead MoreManagement Course: MbaâËâ10 General Management215330 Words à |à 862 PagesShareholder Value I. Valuation 229 229 253 279 1. The ValueâËâBased Management Framework: An Overview 2. Why Value Value? 4. The Value Manager Harvard Business Review Finance Articles Eclipse of the Public Corporation 308 308 323 323 330 330 Article How I Learned to Live with Wall Street Article Second Thoughts on Going Public Article ReedâËâLajoux â⬠¢ The Art of M A: Merger/Acquisitions/Buyout Guide, Third Edition 10. Postmerger Integration 336 336 Text HodgettsâËâLuthansâËâDoh â⬠¢Read MoreFundamentals of Hrm263904 Words à |à 1056 Pagesappropriate per-copy fee to the Copyright Clearance Center, Inc. 222 Rosewood Drive, Danvers, MA 01923, website www.copyright.com. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley Sons, Inc., 111 River Street, Hoboken, NJ 07030-5774, (201)748-6011, fax (201)748-6008, website http://www.wiley.com/go/permissions. To order books or for customer service please, call 1-800-CALL WILEY (225-5945). DeCenzo, David A, Robbins, Stephen P. Fundamentals of Human ResourceRead MoreOne Significant Change That Has Occurred in the World Between 1900 and 2005. Explain the Impact This Change Has Made on Our Lives and Why It Is an Important Change.163893 Words à |à 656 PagesHistory. 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This publication is protected by Copyright, and permission should be obtained from the publisher prior to any prohibited reproduction, storageRead MoreStrategic Marketing Management337596 Words à |à 1351 Pagesix 12.17 Integrating the elements of the marketing mix 12.18 Summary Stage Four: Which way is best? Strategic evaluation 13 Criteria of choice 13.1 Learning objectives 13.2 Introduction 13.3 Financial versus non-financial criteria; effectiveness versus efficiency 13.4 Financial criteria 13.5 Non-financial criteria 13.6 Multiple criteria 13.7 Summary 14 Modelling approaches ââ¬â 1 14.1 Learning objectives 14.2 Introduction 14.3 Costââ¬âvolumeââ¬âprofit analysis 14.4 Investment appraisal 14.5 Summary 15 ModellingRead MoreQuality Improvement328284 Words à |à 1314 PagesJennifer Welter Marketing Manager: Christopher Ruel Production Manager: Dorothy Sinclair Production Editor: Sandra Dumas Senior Designer: Kevin Murphy New Media Editor: Lauren Sapira Editorial Assistant: Mark Owens Production Management Services: Elm Street Publishing Services Composition Services: Aptara, Inc. This book was typeset in 10/12 Times by Aptara, Inc., and printed and bound by R. R. Donnelley (Jefferson City). The cover was printed by R. R. Donnelley (Jefferson City). The paper in this
Wednesday, December 25, 2019
Persuasive Essay On Internet Privacy - 1174 Words
How many apps have you used today, or how many websites have you visited? The answer is probably very many, some even without your knowledge. Behind the pixels of your phone or personal computerââ¬â¢s screen, thousands of bytes of data are being transmitted. Most of that data is what youââ¬â¢d expect: e-mail, texting, weather, games, and so on. Unfortunately there has been a growing problem over the last several years, and itââ¬â¢s not one that is obvious to the average internet user. Some of that sent data contains information which isnââ¬â¢t necessary, oftentimes itââ¬â¢s personal data. Your browsing habits, favorite games, most listened to music genres are being shared to advertising agencies for profit. Privacy is quickly vanishing from the internet andâ⬠¦show more contentâ⬠¦In 2009 Google made the decision, despite profiting from ads long before, to construct advertising profiles of you and then sell them. These profiles are used to construct more appealin g ads based on your interests. Not only is this an invasion of your privacy, but it also has more harmful effects like creating an echochamber. Facebook and Googleââ¬â¢s algorithms, which use their generated profiles, suggest search results or articles based on what it thinks your interests are. Mallory Locklear investigates this in her Engadget article, Google has targeted ads based on hate speech, too, where she explains that this problem can lead to racists having their beliefs affirmed rather than challenged. This is not only harmful to society, but it can also affect you. Racism was just the example used in that article, but that kind of idea reinforcement can happen on any subject matter. Make no mistake, however, Google and Facebook are not the only websites to do this, so the question ââ¬Å"how can I stop this?â⬠has but only one answer: you canââ¬â¢t. Although what you can do is minimize it. Reducing the tracking is difficult, but it is possible. Google is a search engine, and an extensive one at that, but it is not the only one. DuckDuckGo at duckduckgo.com is another search engine similar to Google. It produces many of the same search results as Google, but it does not engage in tracking. DuckDuckGo promises, and delivers, an anonymous search engine whichShow MoreRelatedPrivacy Is A Vulnerable Condition At The Present Time Essay1248 Words à |à 5 Pagesdoubt that out of all history, privacy is at its most vulnerable condition at the present time. Ironically, to secure the whole, individual safety is becoming harmed. The government and businesses are infringing individual privacy in order to protect their society. In effect, balancing between privacy and security has continuously been one of twenty-first centuryââ¬â¢s biggest controversial issues and everyone has their own views about where to value more. Throughout the essay, using various sources, I willRead More Privacy And The Privacy Of Privacy1735 Words à |à 7 PagesIn todayââ¬â¢s society, the word ââ¬Å"privacyâ⬠has become ubiquitous. When discussing whether government surveillance and data collection pose a threat to privacy, the most common retort against privacy advocates ââ¬â by those in favor of databases, video surveillance, spyware, data mining and other modern surveillance measures ââ¬â is this line: If Iââ¬â¢m not doing anything wrong, what would I have to hide? The allowance of the governmentââ¬â¢s gathering and analysis of our personal information stems from an inadequateRead Moreenglish rhetorical analysis 12065 Words à |à 6 Pagesï » ¿Wittke 1 Taylor Wittke Shane Hunter English 151 2/16/15 Privacy Issues: We All Have Them In the essay, ââ¬Å"Why Privacy Matters Even if You Have ââ¬ËNothing to Hideââ¬â¢Ã¢â¬ , published on May 15, 2011, Professor Daniel J. Solove is trying his best to convince his well sophisticated audience that the issue of privacy affects more than just the everyday people veiling a wrong doing. His argument focuses around ethos, and a lot of it. Although there are some logos and pathos, they arenââ¬â¢t as nearly as strong asRead MoreEffects Of Advertising On Personal Privacy And Security1572 Words à |à 7 Pagesof Advertising on Personal Privacy and Security: Persuasive Essay As the world wide web continues to become more prevalent in everyday tasks and the internet continues to evolve, so does the world of advertising. Everyone encounters some form of advertising daily, with the most common being internet advertising. 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I carefully chose five sources to support my argument which is ââ¬Å"the effects of a new definition of privacy.â⬠Nevertheless, after the presentation about my proposal essay, I realized my argument is not well supported by my resources. Meanwhile, with internal willââ¬â¢s influence learned from the class on Dante, I revised my thesis to ââ¬Å"the increasing threats to privacy in the cloud storage are a consequence of the conflict between basic desire and voracity.â⬠These classes, indeed, areRead MoreAnalysis Of The Movie The Hbo Mini Series By John Adams Essay930 Words à |à 4 PagesIt was the persuasive talents of a handful of individuals, as well as some actions by the British, that tipped the tides. As I ponder this perspective of the start of our nation, I cannot help but ask the questions: What is th e best approach to initiate needed change? How am I a change agent? And, I frame these questions within the context of the current educational system. Reflect Let me start with identifying, what should be, a mutual understanding; the computer chip and internet has dramaticallyRead MoreMass Electronic Surveillance is an Invasion of Privacy Essay2474 Words à |à 10 PagesIntroduction Privacy is central to our understanding of freedom of expression and thus on a larger scale democracy. Mass surveillance is an invasion of common manââ¬â¢s privacy. Recent development in the way in which technology can invade privacy has heightened the need for greater protection freedom of expression. However, a major problem in this area is that the public are not provided with adequate information to act against such invasion of their rights. To date, there has been little agreementRead MoreComputer1636 Words à |à 7 Pagesprovides fresh, updated information to keep people on new risk and what to do about them. Providing information that is personally useful such as to avoid scams, fraud, and ID theft. Information on how to protect home PCââ¬â¢s and how to use e-mail and the internet safely. Based on the survey, a greater number of adolescents nowadays have computers at their home. It is considered as one of their most wanted gadget and other than it is popular because of its portability; it is as well advantageous in our everydayRead MoreTechnology s Impact On Society1507 Words à |à 7 Pagesalia Monsanto ENC1101-Swirsky Argumentative/Persuasive Essay Technologyââ¬â¢s Impact on Society 21ST century technology has indubitably made life more convenient for us. This can be looked at in a positive or in a negative way. Technology has essentially taken over the world. Replacing almost everything in our homes, schools and communities. Modern Technology has brought tons of negative effects on society including depression, lack of social skills, obesity, poor sleep habits, stress, constant distractions
Monday, December 16, 2019
Employee Performance Management At International Operations
Introduction Given that the essential mission of a human resources management department is to maximize employee contribution in service of an employer s strategic objectives we could say that therefore managing employee performance is one of the core mission of a human resources department. (Johnason, 2009). Some changes in the business environment such as globalization and deregulation of markets are fostering companiesââ¬â¢ internationalization. At the same time the decreasing barriers for new entrants is significantly increasing the competitiveness. To succeed in a highly competitive and international environment is nowadays more important than ever to maximize employee performance. In this report we are going to see how we can improveâ⬠¦show more contentâ⬠¦The importance of performance management in the company capability to thrive seems clear. But what is exactly performance management? Some of the most widely accepted definitions are these: ââ¬Ëââ¬â¢At its best, performance management is a holistic process that ensures employeesââ¬â¢ performance contributes to business objectives. It brings together many of elements of good people management practice, including learning and development, measurement of performance, and organizational development.ââ¬Ëââ¬â¢ (CIPD 2016) ââ¬Ëââ¬â¢Performance management is a continuous process of identifying, measuring and developing the performance of individuals and teams and aligning performance with the strategic goals of the organizationââ¬â¢Ã¢â¬â¢ (Aguinis, 2005) As weââ¬â¢ve seen in the above definitions there are many processes that might have an impact in employee performance since it depend on many variables. From the candidate selection, training, mentoring to access to resources are variables that have a clear impact on employee performance (Becker, 1996). To make the analysis more clear we are going to focus in the core performance management processes that are intentionally and specifically focused in improving company performance and to do that we are going to see what practices are companies doing nowadays. The current practices in performance management A performance management system is a combination of different practices that a
Sunday, December 8, 2019
Effects of Altitude of Human Physiology Essay Example For Students
Effects of Altitude of Human Physiology Essay THE EFFECTS OF ALTITUDE ON HUMAN PHYSIOLOGY Changes in altitude have a profound effect on the human body. The bodyattempts to maintain a state of homeostasis or balance to ensure the optimaloperating environment for its complex chemical systems. Any change from thishomeostasis is a change away from the optimal operating environment. The bodyattempts to correct this imbalance. One such imbalance is the effect ofincreasing altitude on the bodyââ¬â¢s ability to provide adequate oxygen to beutilized in cellular respiration. With an increase in elevation, a typicaloccurrence when climbing mountains, the body is forced to respond in variousways to the changes in externalenvironment. Foremost of these changes is the diminished ability to obtainoxygen from the atmosphere. If the adaptive responses to this stressor areinadequate the performance of body systems may decline dramatically. Ifprolonged the results can be serious or even fatal. In looking at the effectof altitude on body functio ning we first must understand what occurs in theexternal environment at higher elevations and then observe the importantchanges that occur in the internal environment of the body in response. HIGH ALTITUDE In discussing altitude change and its effect on the body mountaineersgenerally define altitude according to the scale of high (8,000 12,000feet), very high (12,000 18,000 feet), and extremely high (18,000+ feet),(Hubble, 1995). A common misperception of the change in external environmentwith increased altitude is that there is decreased oxygen. This is notcorrect as the concentration of oxygen at sea level is about 21% and staysrelatively unchanged until over 50,000 feet (Johnson, 1988). What is really happening is that the atmospheric pressure is decreasing andsubsequently the amount of oxygen available in a single breath of air issignificantly less. At sea level the barometric pressure averages 760 mmHgwhile at 12,000 feet it is only 483 mmHg. This decrease in total atmosphericpressure means that there are 40% fewer oxygen molecules per breath at thisaltitude compared to sea level (Princeton, 1995). HUMAN RESPIRATORY SYSTEM The human respiratory system is responsible for bringing oxygen into thebody and transferring it to the cells where it can be utilized for cellularactivities. It also removes carbon dioxide from the body. The respiratorysystem draws air initially either through the mouth or nasal passages. Bothof these passages join behind the hard palate to form the pharynx. At thebase of the pharynx are two openings. One, the esophagus, leads to thedigestive system while the other, the glottis, leads to the lungs. Theepiglottis covers the glottis when swallowing so that food does not enter thelungs. When the epiglottis is not covering the opening to the lungs air maypass freely into and out of the trachea. The trachea sometimes called the ââ¬Å"windpipeâ⬠branches into two bronchi whichin turn lead to a lung. Once in the lung the bronchi branch many times intosmaller bronchioles which eventually terminate in small sacs called alveoli. It is in the alveoli that the actual transfer of oxygen to the blood takesplace. The alveoli are shaped like inflated sacs and exchange gas through amembrane. The passage of oxygen into the blood and carbon dioxide out of theblood is dependent on three major factors: 1) the partial pressure of thegases, 2) the area of the pulmonary surface, and 3) the thickness of themembrane (Gerking, 1969). The membranes in the alveoli provide a largesurface area for the free exchange of gases. The typical thickness of thepulmonary membrane is less than the thickness of a red blood cell. Thepulmonary surface and the thickness of the alveolar membranes are notdirectly affected by a change in altitude. The partial pressure of oxygen,however, is directly related to altitude and affects gas transfer in thealveoli. GAS TRANSFER To understand gas transfer it is important to first understand somethingabout thebehavior of gases. Each gas in our atmosphere exerts its own pressure andacts independently of the others. Hence the term partial pressure refers tothe contribution of each gas to the entire pressure of the atmosphere. Theaverage pressure of the atmosphere at sea level is approximately 760 mmHg. This means that the pressure is great enough to support a column of mercury(Hg) 760 mm high. To figure the partial pressure of oxygen you start with thepercentage of oxygen present in the atmosphere which is about 20%. Thusoxygen will constitute 20% of the total atmospheric pressure at any givenlevel. At sea level the total atmospheric pressure is 760 mmHg so the partialpressure of O2 would be approximately 152 mmHg. 760 mmHg x 0.20 = 152 mmHgA similar computation can be made for CO2 if we know that the concentrationis approximately 4%. The partial pressure of CO2 would then be about 0.304mmHg at sea level. Gas transfer at the alveoli follows the rule of simple diffusion. Diffusionis movement of molecules along a concentration gradient from an area of highconcentration to an area of lower concentration. Diffusion is the result ofcollisions between molecules. In areas of higher concentration there are morecollisions. The net effect of this greater number of collisions is a movementtoward an area of lower concentration. In Table 1 it is apparent that theconcentration gradient favors the diffusion of oxygen into and carbon dioxideout of the blood (Gerking, 1969). Table 2 shows the decrease in partialpressure of oxygen at increasing altitudes (Guyton, 1979). Table 1ATMOSPHERIC AIRALVEOLUSVENOUS BLOODOXYGEN152 mmHg (20%)104 mmHg (13.6%) 40 mmHgCARBON DIOXIDE 0.304 mmHg (0.04%)40 mmHg (5.3%) 45 mmHgTable 2ALTITUDE (ft.) BAROMETRIC PRESSURE (mmHg)Po2 IN AIR (mmHg)Po2 IN ALVEOLI(mmHg) ARTERIAL OXYGEN SATURATION (%)0 760159*104 9710,000523 110 67 9020,000349 73 40 7030,000226 47 21 2040,000141 29 8550,00087 18 11 *this value differs from table 1 because the author used the value for theconcentration of O2 as 21%. The author of table 1 choose to use the value as 20%. CELLULAR RESPIRATION In a normal, non-stressed state, the respiratory system transports oxygenfrom the lungs to the cells of the body where it is used in the process ofcellular respiration. Under normal conditions this transport of oxygen issufficient for the needs of cellular respiration. Cellular respirationconverts the energy in chemical bonds into energy that can be used to powerbody processes. Glucose is the molecule most often used to fuel this processalthough the body is capable of using other organic molecules for energy. The transfer of oxygen to the body tissues is often called internalrespiration (Grollman, 1978). The process of cellular respiration is acomplex series of chemical steps that ultimately allow for the breakdown ofglucose into usable energy in the form of ATP (adenosine triphosphate). Thethree main steps in the process are: 1) glycolysis, 2) Krebs cycle, and 3)electron transport system. Oxygen is required for these processes to functionat an efficient level. Without the presence of oxygen the pathway for energyproduction must proceed anaerobically. Anaerobic respiration sometimes calledlactic acid fermentation produces significantly less ATP (2 instead of 36/38)and due to this great inefficiency will quickly exhaust the available supplyof glucose. Thus the anaerobic pathway is not a permanent solution for theprovision of energy to the body in the absence of sufficient oxygen. The supply of oxygen to the tissues is dependent on: 1) the efficiency withwhich blood is oxygenated in the lungs, 2) the efficiency of the blood indelivering oxygen to the tissues, 3) the efficiency of the respiratoryenzymes within the cells to transfer hydrogen to molecular oxygen (Grollman,1978). A deficiency in any of these areas can result in the body cells nothaving an adequate supply of oxygen. It is this inadequate supply of oxygenthat results in difficulties for the body at higher elevations. The Art Institute Culinary Arts Essay ExampleSide effects subside when the drug is stopped. Diamox is a sulfonamide drug,so people who are allergic to sulfa drugs such as penicillin should not takeDiamox. Diamox has also been known to cause severe allergic reactions topeople with no previous history of Diamox or sulfaallergies. A trial course of the drug is usually conducted before going to aremote location where a severe allergic reaction could prove difficult totreat. Some recent data suggests that the medication Dexamethasone may havesome effect in reducing the risk of mountain sickness when used incombination with Diamox (University of Iowa, 1995). Moderate AMS requires advanced medications or immediate descent to reversethe problem. Descending even a few hundred feet may help and definiteimprovement will be seen in descents of 1,000-2,000 feet. Twenty-four hoursat the lower altitude will result in significant improvements. The personshould remain at lower altitude until symptoms have subsided (up to 3 days). At this point, the person has become acclimatized to that altitude and canbegin ascending again. Severe AMS requires immediate descent to loweraltitudes (2,000 4,000 feet). Supplemental oxygen may be helpful inreducing the effects of altitude sicknesses but does not overcome all thedifficulties that may result from the lowered barometric pressure. GAMOW BAG This invention has revolutionized field treatment of high altitudeillnesses. The Gamow bag is basically a portable sealed chamber with a pump. The principle of operation is identical to the hyperbaric chambers used indeep sea diving. The person is placed inside the bag and it is inflated. Pumping the bag full of air effectively increases the concentration of oxygenmolecules and therefore simulates a descent to lower altitude. In as littleas 10 minutes the bag creates an atmosphere that corresponds to that at 3,000 5,000 feet lower. After 1-2 hours in the bag, thepersonââ¬â¢s body chemistry will have reset to the lower altitude. This lasts forup to 12 hours outside of the bag which should be enough time to travel to alower altitude and allow for further acclimatization. The bag and pump weighabout 14 pounds and are now carried on most major high altitude expeditions. The gamow bag is particularly important where the possibility of immediatedescent is not feasible. OTHER ALTITUDE-INDUCED ILLNESS There are two other severe forms of altitude illness. Both of these happenlessfrequently, especially to those who are properly acclimatized. When they dooccur, it is usually the result of an increase in elevation that is too rapidfor the body to adjust properly. For reasons not entirely understood, thelack of oxygen and reduced pressure often results in leakage of fluid throughthe capillary walls into either the lungs or the brain. Continuing to higheraltitudes without proper acclimatization can lead to potentially serious,even life-threatening illnesses. HIGH ALTITUDE PULMONARY EDEMA (HAPE) High altitude pulmonary edema results from fluid buildup in the lungs. Thefluid in the lungs interferes with effective oxygen exchange. As thecondition becomes more severe, the level of oxygen in the bloodstreamdecreases, and this can lead to cyanosis, impaired cerebral function, anddeath. Symptoms include shortness of breath even at rest, tightness in thechest,marked fatigue, a feeling of impending suffocation at night, weakness, and apersistent productive cough bringing up white, watery, or frothy fluid(University of Iowa, 1995.). Confusion, and irrational behavior are signsthat insufficient oxygen is reaching the brain. One of the methods fortesting for HAPE is to check recovery time after exertion. Recovery timerefers to the time after exertion that it takes for heart rate andrespiration to return to near normal. An increase in this time may mean fluidis building up in the lungs. If a case of HAPE is suspected an immediatedescent is a necessar y life-saving measure (2,000 4,000 feet). Anyonesufferingfrom HAPE must be evacuated to a medical facility for proper follow-uptreatment. Early data suggests that nifedipine may have a protective effectagainst high altitude pulmonary edema (University of Iowa, 1995). HIGH ALTITUDE CEREBRAL EDEMA (HACE) High altitude cerebral edema results from the swelling of brain tissue fromfluid leakage. Symptoms can include headache, loss of coordination (ataxia),weakness, and decreasing levels of consciousness including, disorientation,loss of memory, hallucinations, psychotic behavior, and coma. It generallyoccurs after a week or more at high altitude. Severe instances can lead todeath if not treated quickly. Immediate descent is a necessary life-savingmeasure (2,000 4,000 feet). Anyone suffering from HACE must be evacuatedto a medical facility for proper follow-uptreatment. CONCLUSION The importance of oxygen to the functioning of the human body is critical. Thus the effect of decreased partial pressure of oxygen at higher altitudescan be pronounced. Each individual adapts at a different speed to exposure toaltitude and it is hard to know who may be affected by altitude sickness. There are no specific factors such as age, sex, or physical condition thatcorrelate with susceptibility to altitude sickness. Most people can go up to8,000 feet with minimal effect. Acclimatization is often accompanied by fluidloss, so the ingestion of large amounts of fluid to remain properly hydratedis important (at least 3-4 quarts per day). Urine output should be copiousand clear. From the available studies on the effect of altitude on the human body itwould appear apparent that it is important to recognize symptoms early andtake corrective measures. Light activity during the day is better thansleeping because respiration decreases during sleep, exacerbating thesymptoms. The avoidance of tobacco, alcohol, and other depressant drugsincluding, barbiturates, tranquilizers, and sleeping pills is important. These depressants further decrease the respiratory drive during sleepresulting in a worsening of the symptoms. A high carbohydrate diet (more than70% of your calories from carbohydrates) while at altitude alsoappears to facilitate recovery. A little planning and awareness can greatly decrease the chances of altitudesickness. Recognizing early symptoms can result in the avoidance of moreserious consequences of altitude sickness. The human body is a complexbiochemical organism that requires an adequate supply of oxygen to function. The ability of this organism to adjust to a wide range of conditions is atestament to its survivability. The decreased partial pressure of oxygen withincreasingaltitude is one of these adaptations. Sources:Electric Differential Multimedia Lab, Travel Precautions and Advice,University of Iowa Medical College, 1995. Gerking, Shelby D., Biological Systems, W.B. Saunders Company, 1969. Grolier Electronic Publishing, The New Grolier Multimedia Encyclopedia, 1993. Grollman, Sigmund, The Human Body: Its Structure and Physiology, MacmillianPublishing Company, 1978. Guyton, Arthur C., Physiology of the Human Body, 5th Edition, SaundersCollege Publishing, 1979. Hackett, P., Mountain Sickness, The Mountaineers, Seattle, 1980. Hubble, Frank, High Altitude Illness, Wilderness Medicine Newsletter,March/April 1995. Hubble, Frank, The Use of Diamox in the Prevention of Acute MountainSickness, Wilderness Medicine Newsletter, March/April 1995. Isaac, J. and Goth, P., The Outward Bound Wilderness First Aid Handbook,Lyons Burford, New 1991. Johnson, T., and Rock, P., Acute Mountain Sickness, New England Journal ofMedicine, 1988:319:841-5Langley, Telford, and Christensen, Dynamic Anatomy and Physiology,McGraw-Hill, 1980. Princeton University, Outdoor Action Program, 1995. Starr, Cecie, and Taggart, Ralph, Biology: The Unity and Diversity of Life,Wadsworth Publishing Company, 1992. Tortora, Gerard J., and Grabowski, Sandra, Principles of Anatomy andPhysiology, Seventh Edition, Harper Collins College Publishers, 1993. Wilkerson., J., Editor, Medicine for Mountaineering, Fourth Edition, TheMountaineers, Seattle, 1992.
Sunday, December 1, 2019
Nelson Mandela Essays (3754 words) - Xhosa People, Nelson Mandela
Nelson Mandela Excuse me sir, may I see your pass? These words mean very little to most Americans; however these words struck fear in the hearts of black South Africans during the times of apartheid. While apartheid was being practiced, blacks were restricted in the jobs they could hold, facilities they could use, as well as the places they could be, and all blacks had to carry passes for identification purposes. If the passes were not in order, the carrier was subject to arrest. Through these terrifying times, one man rose above all the rest in the effort to combat this terrible practice of apartheid. This man was Nelson Mandela; a man who was so dedicated to the overthrow of apartheid that he was willing to spend twenty-seven years of his live in prison for the cause. Mandela's rise to the South African presidency, after his release is well documented, but in order to truly understand Mandela, one must examine his life before his prison term, and rise to the presidency. When analyzing Mandela's l ife from this point of view, several questions come to the forefront. First of all, what was the extent of the apartheid laws which Mandela and the people of South Africa were facing? Secondly, what tactics did Mandela use to combat this practice of apartheid? Thirdly, what factors played a motivating force in the life of Mandela? And finally, what impact does the life of Nelson Mandela have on the rest of the world? After carefully answering each of these questions, one can easily see that Nelson Mandela was a man shaped by apartheid into a staunch nationalist that served as an example for his people and the world. In understanding Mandela as a nationalist, one must first have an idea of the brutal laws which he faced and dedicated his life to overthrowing. Apartheid was the policy being used to repress the blacks at the time of Mandela. Encyclopedia of Britannica describes apartheid as, policy that governed relations between South Africa's white minority and nonwhite majority and sanctioned racial segregation and political and economic discrimination against nonwhites (Britannica web). It is important to note that racial discrimination existed in South Africa since Europeans first came there, however the policy of apartheid was not instituted until after the victory of the National Party in the election of 1948 (Britannica web). Once the National Party gained power, they began their movement towards apartheid in 1950 with the Population Registration Act (Britannica web). With the passing of the act, all South Africans were forced to classify themselves into one of three racial groups: Bantu (b lack South Africans), Coloured (of mixed dissent), and white (Britannica web). A fourth group to include Asian inhabitants was a later addition to the act (Britannica web). This demeaning Population Registration Act was the foundation for all of the brutal apartheid laws that were yet to come from the National Party. Once the National Party had all South Africans placed into categories based on their race, they preceded to enact one policy that was particularly devastating to blacks. The name of this policy was the Group Areas Act of 1950. Before discussing the impact of this act, it is important to understand the extent of the majority the blacks had over the whites. Black residents numbered 31.5 million people, Colorued were 3.3 million, Asian 1.2 million, and the whites had only 5.4 million inhabitants (Geocities web). Now the purpose of the Group Areas Act was to prevent members of certain races from having land, houses, or businesses in particular areas of the country (Britannica web). As a result of this act, the small minority of white citizens was allotted over 80% of South Africa's land (Britannica web). By analyzing the numbers presented, it is not difficult to see how this act had a devastating effect on black South Africans. Blacks represent approximately 75% of the population, yet ar e only able to use less than 20% of the land. As one could imagine, it would be hard for anyone to prosper under those conditions. Besides the Population Registration Act, and the Group Areas Act many other acts were passed to ensure the segregation between blacks and whites. Two acts in
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