The Origin of Wildfires and How They Are Caused

The Origin of Wildfires and How They Are Caused It is interesting to note that, of the four billion years of earths existence, conditions were not conducive for spontaneous wildfire until the last 400 million years. A naturally-occurring atmospheric fire did not have the chemical elements available until major several earth changes occurred. The earliest life forms emerged without needing oxygen (anaerobic organisms) to live about 3.5 billion years ago and lived in a carbon dioxide based atmosphere. Life forms that needed oxygen in small amounts (aerobic) came much later in the form of photosynthesizing blue-green algae and ultimately changed the earths atmospheric balance toward oxygen and away from carbon dioxide (co2). Photosynthesis increasingly dominated earths biology by initially creating and continuously increasing the earths percentage of oxygen in the air. Green plant growth then exploded and aerobic respiration became the biologic catalyst for terrestrial life. Around 600 million years ago and during the Paleozoic, conditions for natural combustion started developing with increasing speed. Wildfire Chemistry Fire needs fuel, oxygen, and heat to ignite and spread. Wherever forests grow, the fuel for forest fires is provided mainly by continued biomass production along with the resulting fuel load  of that vegetative growth. Oxygen is created in abundance by the photosynthesizing process of living green organisms so it is all around us in the air. All that is needed then is a source of heat to provide the exact chemistry combinations for a flame. When these natural combustibles (in the form of wood, leaves, brush) reach 572 º, gas in the steam given off reacts with oxygen to reach its flash point with a burst of flame. This flame then preheats surrounding fuels. In turn, other fuels heat up and the fire grows and spreads. If this spreading process is not controlled, you have a wildfire or uncontrolled forest fire. Depending on the geographic condition of the site and the vegetative fuels present, you might call these brush fires, forest fires, sage field fires, grass fires, woods fires, peat fires, bush fires, wildland fires, or veld fires. How Do Forest Fires Start? Naturally caused forest fires are usually started by dry lightning where little to no rain accompanies a stormy weather disturbance. Lightning randomly strikes the earth an average of 100 times each second or 3 billion times every year and has caused some of the most notable wildland fire disasters  in the western United States. Most lightning strikes occur in the North American southeast and southwest. Because they often occur in isolated locations with limited access, lightning fires burn more acres than human-caused starts. The average 10-year total of U.S. wildfire acres burned and caused by humans is 1.9 million acres where  2.1 million acres burned are lightning-caused. Still, human fire activity is the primary cause of wildfires, with nearly ten times the start rate of natural starts. Most of these human-caused fires are accidental, usually caused by carelessness or inattention by campers, hikers, or others traveling through wildland or by debris and garbage burners. Some are intentionally set by arsonists. Some human-caused fires are started to reduce heavy fuel buildup and used as a forest management tool. This is called a controlled or prescribed burn and used for wildfire fire fuel reduction, wildlife habitat enhancement, and debris clearing. They are not included in the above statistics and ultimately reduce wildfire numbers by reducing conditions that contribute to wildfire and forest fires. How Does Wildland Fire Spread? The three primary classes of wildland fires are surface, crown, and ground fires. Each classification  intensity depends on the quantity and types of fuels involved and their moisture content. These conditions have an effect on fire intensity and will determine how fast the fire will spread. Surface fires typically burn readily but at a low intensity and partially consume the entire fuel layer while presenting little danger to mature trees and root systems. Fuel buildup over many years will increase intensity and especially when associated with drought, can become a rapidly spreading ground fire. Regular controlled fire or prescribed burning effectively reduces the fuel buildup leading to a damaging ground fire.Crown fires generally result from intense rising ground fire heat and occur in the higher sections of draping trees. The resulting ladder effect causes hot surface or ground fires to climb the fuels into the canopy. This can increase the chance for embers to blow and branches to fall into unburned areas and increase the spread the fire.Ground fires are the most infrequent type of fire but make for very intense blazes that can potentially destroy all vegetation and organic manner, leaving only bare earth. These largest fires actually create their own winds and weat her, increasing the flow of oxygen and feeding the fire.

Why Healthcare Jobs Are On The Rise

Why Healthcare Jobs Are On The Rise The health care industry is booming and will continue to do so for the foreseeable future, offering good pay and job security. The expansion in health care jobs is due to several reasons. Those interested in pursuing a career in the healthcare field can find many opportunities for employment. The reasons for an increasing number of workers in the field is twofold. SEE ALSO:Â  Top 5 Overlooked and Rewarding Healthcare CareersIncreasing Job Opportunities in Health CareAccording to the U.S. Bureau of Labor Statistics, the need for qualified health care workers in different sectors will increase by 19 percent by 2024. There are already 18.9 million individuals employed in the healthcare field, which is almost four million more than in 2005. This increase in the need for healthcare workers outpaces all other professions. Healthcare workers, as an average, also show a higher median income than other professions.America’s Aging PopulationSince the baby boomer generation started reac hing the age of 65 several years ago, the number of older Americans who require health care services has increased exponentially. In addition, life expectancies have jumped considerably. By 2050, men are expected to live to 80 and women to 86, according to Everyday Health. This increase of the number of senior citizens with longer lifespans adds to the need for health care workers across the board. In addition, as current healthcare worker retire, replacements are needed. From senior retirement homes and nursing centers to physicians, pharmacists, rehabilitation services and other workers, opportunities will expand for health care positions.More People Have Health InsuranceThe Affordable Care Act has allowed millions of persons to enroll in health insurance plans. Medicaid has also expanded in many states, allowing those previously without health insurance to be covered. Individuals can no longer be refused insurance coverage due to pre-existing conditions. This expansion lets many previously uninsured individuals seek health care treatments and adds to the need for healthcare workers.Health Care JobsAlthough all healthcare jobs are expected to grow over the years, the following jobs were chosen as some of the best jobs for growth outlook by 2022, according to a 2015 report on one website that rates jobs. These include audiologist, expected to grow by 34 percent, dental hygienist by 33 percent, dietician by 21 percent, physical therapist by 36 percent and medical records jobs by 22 percent. Other healthcare jobs are following suit in hospital, clinic and physician offices, home healthcare, nursing and assisted living situations and other areas.Healthcare jobs are growing, and it can be a good time to get into these professions for steady employment in the future. TheJobNetwork conducts job searches for you and sends listings to your email in the form of alerts, so you can choose the right job for you. All you do is fill out your qualifications and job interest s to sign up with TheJobNetwork, and you are on your way to a new job.

Choose one arid region and write a report comparing possible methods Assignment

Choose one arid region and write a report comparing possible methods of water provision to the area - Assignment Example The magnitude of the problem is increasing because of the lack of awareness among the general public of these areas about the sustainable and economical use of water. This report discusses the situation of water supply crisis in one such region i.e. Qatar and a few solutions to the problem and methodologies for providing water are also discussed. 2. Background The problem of water shortage is not due to global warming but is more due to the increase in population and the wastage of water by a large number of people throughout the world. More 20% of the world population does not have access to clean drinking water. The United Nations water program has set a target, in Millennium Development Goals, of supplying 85% of world population with safe drinking water by the end of 2020. But with the increasing population and increased wastage and pollution of water this target cannot be achieved before 2030. The third edition of the World Water Development Report (WWDR3) presented in the fifth World Water Forum in Istanbul in March 2009, various issues have been identified as the cause of the water shortage in the world, particularly in the arid regions. ... The salient features and the application of the various alternative methods with respect to Qatar is discussed separately in the following paragraphs. a. Wastewater Treatment and Reuse A large quantity of water is used for household washing purposes. This water which can be reused after proper treatment is normally wasted and thus contributes to the problem of water shortage particularly in the arid regions of the world. Qatar being one such region can also utilize its wastewater for fulfilling the increasing demand of water in the country. Wastewater does not only fulfill the increasing water demand but it is also very effective in controlling water pollution and various water-borne diseases particularly in countries like Qatar where people are unaware of the hygienic procedures through which they can stop water pollution. Wastewater reuse has is being practiced in various countries for providing fresh water resources. Qatar generates more than 2 million cubic meters of waste water in the form of household and industrial waste (Gleik, Cooley and Morikawa, 2008). Out of which about 35% can be treated and reused. Doing so will fulfill 50% of the household demand of water in Qatar. The cost per cubic meter ($0.49) is also lower as compared to the water obtained from desalination (2$ per cubic meter). Moreover wastewater treatment also resolves the issue of water pollution because the water is treated and reused instead of discharging into land which pollutes land and underground water resources. Another advantage of the reuse of wastewater is the localized nature of water supply system because the wastewater generated by a certain locality can be treated and reused

How far do you agree with the intentionalist perspective that Hitler Coursework

How far do you agree with the intentionalist perspective that Hitler had always intended the extermination of the Jews - Coursework Example Hitler insisted to the German population that the Jews were socialists as well as democrats who eagerly exploited the Aryan people’s need for social justice to grab social power over the Aryan population (Victor, 2000). The same school affirmed that Hitler made a blue print of his step by step architectural plan. The plan prioritised removing the Jews from the face of the earth. The intentionalists declared the Hitler Germany policy to exterminate the Jews led to the 1941 German invasion of USSR. The attack on the Jews was dubbed as Hitler’s final solution. Intentionalist philosopher Gerald Fleming branded Hitler as the Fighing Prophet. (Totten, 2000). Further, the Nazi anti-Semitism policy from 1933 to 1939 focused on the discrimination of the Jewish people. Hitler’s government priorities included removing the Jews’ rights. For example, the business companies implemented the Hitler government policy by terminating Jews from their workplaces. In Germany, the Jewish youth did not have equal societal opportunities with non-Jewish youths (Friedlander, 2014). In terms of how far Nazi leaders achieved prescribed policy goals, the Hitler government implemented a new civil service law on April 7, 1933 prohibiting the hiring of Jews. On April 26, the German government ordered the public burning of all Jew-authored books. On July 14, 1933, the German government cancelled the citizenship of its Eastern Jew residents (Friedlander, 2014). Concentration camps, including the Oranienburg_camp and the 1936 Dachau_concentration camps, were set up starting in 1933. During 1937, the government set up the Buchewald concentration_camp to accommodate the growing number of new Jewish prisoners. The camps were used for the consequent massacre of the German Jews. Instead of forcing Jewish prisoners to help in the production of German military equipment, Hitler preferred

The Elements of Drama Essay Example | Topics and Well Written Essays - 500 words

The Elements of Drama - Essay Example Antigone feels that although Creon is a man, he is weak than she is. This is illustrated in their conversation after burying Polyneices and she is taken to Creon. She literary tells him that she has the power to say no to what she regards as vile and does not have to count any cost of it. She regards Creon as just a ruler who is controlled by the rules just because he ascended to the throne but not because he believes in them. Creon will then have to execute her even if he does not want to in order to abide by the crown. Creon is thus terrified if his action but is unable to act contrary. Antigone reads his fear and proclaims that even if her nails are broken, her finger covered in blood and her arms are wounded, she will still remain a queen. Antigone is terrified at the thought of death but then she is ready to embrace her death as a martyr. As a feminist, Antigone faces many challenges with her sister. Her encounter with Ismene about the burial of Polyneices leaves her heartbroken. Ismene is a conservative girl who believes in the maintenance of the status quo. When Antigone tells her to join her and bury their brother, Ismene is keen to remind her that the king has ordered a decree against anyone who will be seen burying him. She tells her that their family has suffered enough and was not ready to undergo another tragedy. Ismene reminds her that they are now all alone and therefore should do well in submitting to the law and obey. To Ismene, women must not fight with men. There is a conflict in philosophies at this time and Antigone tells her sister off and vows not to take her help even if she comes begging to offer it. Antigone is determined to defy Creon’s decree and bury her brother even if alone. Antigone’s conversation with her sister Ismene is fundamental in the analysis of her feminist trait. Ismene questions the role of nature in their lives. She argues that even when pushed, it should not be

Expected Value Essay Example | Topics and Well Written Essays - 2500 words

Expected Value - Essay Example This is because of the unpredictability of certain parameters which are associated with our planning. For example, in a cricket match, winning the toss has major role in deciding the victory. Most of the cricket pitches are underprepared which may favor either batting or bowling initially and then changes its characteristics later during the second innings. The toss winning captain can take decisions about whether to bat/ bowl first or to include pace bowlers or spinners in the team, based on the evaluation of the pitch. Many of the cricket teams underprepare their cricket pitches based on their strengths in batting and bowling. However, if they fail to win tosses, their planning cannot be implemented successfully. This is because of the fact that the chances of winning a toss are 50-50 since the coin has only two sides. In other words, the probability of getting a head or tail is 50-50. In such uncertain situations, the mathematical term â€Å"expected value† can help people in taking decisions. Expected value in mathematics is the weighted average of all the possible values. In other words, all the possibilities of a particular event will be evaluated properly while calculating the expected value. In industries and casinos, expected value has significant role to play. This paper analyses the history and importance of expected value. History of expected value The exact date of origination of the idea about expected value is still unknown to us. However, it is widely accepted that the expected value concepts were used during the latter half of the seventeenth century. Blaise Pascal, a French scientist and mathematician, is believed to be the founding father of the expected value theory. During the middle part of seventeenth century, the question of how to solve the problems of points or the problems of division of stakes raised major challenges to the mathematicians. Blaise Pascal and his associates started to solve these problems and the idea of expecte d value originated from their efforts. Even though, Pascal and his associates used different methods to solve this problem, they got same results since they used the same fundamental principle of mathematics in all their calculations. Apart from Pascal and his associates, a Dutch mathematician called Christian Huygens also contributed heavily to the development of expected value theory. Significance of expected value theory in casinos Expected value theory has greater significance in gambling. The chances of winning and losing in gambling depend on various parameters associated with the particular game selected for gambling. For example, poker is a game, which works on mathematical principles. Even though the nature and characteristics of the players play a vital role in deciding the winners of the poker game, many calculations including permutations and combinations are necessary to make sound decisions. For example, the right frequency to bluff in a situation is determined based o n the likelihood your opponent will fold in that particular situation. In limit, for example, when all the cards are out, how do you determine whether you should bluff on the river? If you can figure out that the pot is offering a caller 5:1 odds to call, but you know that they will fold the best hand 1 in six times, then bluffing now becomes mathematically correct (Importance of Math: expected value,

Wars in the Middle East past to present day Research Paper

Wars in the Middle East past to present day - Research Paper Example The Middle East is a core region that connects the three continents of Africa, Asia and Europe. In terms of conflicts, the Middle East countries have always had disputes that center on economics, politics, boundaries and religion. From the 20th century, there have been numerous conflicts that have always possessed the same theme. One of the first major conflicts relate to unification of Saudi Arabia (Tucker 34). This was a strategy whereby emirates and tribes could come under the single control of Al Saud. The conflict spread over a period of thirty years into creating the modern Saudi Arabia. This was the third state after the two previous ones. In this conflict, Al Saud conquered Riyadh and regions such as Al-Hasa and Nejd. Ibn Saud managed to take over Riyadh by killing the chief and capturing the castle. Similarly, the Egyptian revolution marked crucial occurrences of 1919. Sudan and Egypt participated into a revolt that sought to eliminate British rule from the region. This cont ributed to Egyptian independence and subsequent formation of a constitution. A temporary arrangement of British protectorate over Egypt lasted for an unexpected period. The agreement did not grant full sovereignty to Egypt and this resulted into further revolutionary activities. Egyptian strove towards political reform by having the 1952 revolution that eliminated the monarchial government (Tucker 803). One of the closely related revolutions relates to the 1979 Iran movement that uprooted the monarchy and established a new regime under Ayatollah Khomeini (Hoogland 11). The latest Asian conflict has been the famous Arab Spring. It has occurred in countries such as Libya, Egypt and Tunisia (Peters 33). In Western Asia, affected countries include Syria, Saudi Arabia, Bahrain and Oman. It is notable that Asian countries have enjoyed fair economic progress by initiating certain policies. Most of the Middle East countries rely on oil and irrigation oriented Agriculture for their economic growth and survival. In addition, the countries flourish in extensive trade. The political orientation of these countries has always relied in robust governments with immense powers. The immense powers rely on few think tanks that propose regular changes and economic direction. In addition, the leadership was mainly patriarchal and monarchial. However, this was perceivable to have fostered an autocracy. In spite of the economic progress, the capacity for democracy was increasingly becoming limited. The leadership had become autocratic and inflexible to initiating new regimes. This became a political issue whereby the citizens could not effectively vote for their preferred leaders. In this age of limited democracy, Middle East citizens were significantly gaining education in their countries and other places. This triggered a generational gap whereby the younger generation could communicate through intensive technology. In this perspective, many citizens, who were mostly youth, organi zed an extensive revolution as they strove to uproot the longest surviving autocracies. One of the most prominent border conflicts relates to India and Pakistan tussle over the Kashmir region. The two regions were separated due to religious disparity between the same. Almost all conflicts, between the two countries, have a basis over Kashmir (Paul 64). The first conflict that the two countries experienced relates to leadership dispute over the region.