Earth Structures

Lesson Goal: Recognize how bedrock responds to tectonic forces originating deep within Earth. 1. Compare and contrast stress and strain. In material science, strain is express by deformation caused through the action of stress on a physical body. It is calculated by a change in two body states; beginning and final states. The difference in two states expresses the (numerical) value of strain. Strain is equal to a change in size and shape of a physical body. Strain can be categorized in to two types; homogenous and non-homogenous.Homogenous strain is referred if the strain is equal the entire portion of the body while non-homogenous strain; the strain is equal to a portion of a body. Stress is equivalent to force per unit area. It is calculated by the intensity of internal forces performing within a body across imaginary internal surfaces. This results to externally applied and body forces. Stress is related to force while strain is related to deformation. In stress-associated propert ies, all materials have temperature dependent differences.Static fluids support the hydrostatic pressure; it will flow under shear stress. Moving viscous fluids supports the dynamic pressure (Samaniego â€Å"Stress, strain and fault patterns†). 2. Distinguish between joints and faults. What makes a fault active? In geology, joint is a fracture in a rock mass, which has no offset. It refers to non-lateral movement of one side relative to the other while a fault refers to a fracture in rock mass where one side slides laterally past to the other. The structure of a joint forms a solid and hard rock that stretches past its elastic modules.In any case, the rock fractures in a plane perpendicular to the extensional stress is paralled with compressive stress. Joints naturally exist when erosion removes overlying rocks. This reduces the compressive load and allowing the rock to expand laterally. In addition, cooling of hot rock masses and cooling joints forms joint (Joint 2007). Ther e are three major classifications of faults. These include normal, reverse and strike slip faults. The (tectonic) stresses due to plate motions were developed over time and breaks in the crust of the Earth. The rocks at uneven periods break up.This results to earthquakes. Normal faulting originated at the divergent boundaries while reverse faulting originated at convergent boundaries. Normal faulting is associated with crustal extension while reverse faulting is associated with crustal shortening. Lastly, strike-slip faulting originated at transformed boundaries (Reches â€Å"Faulting of rocks in three-dimensional strain fields II. Theoretical analysis†). 3. Explain what each type of unconformity implies about the sequence of geologic events. Four types of unconformity include; disconformity, nonconformity, angular unconformity and paraconformity.Disconformity refers to an unconformity between parallel layers of sedimentary rocks representing a period of erosion. Nonconformit y exists between sedimentary rocks and igneous rocks. The sedimentary rock lies above and deposited on the pre-existing and eroded igneous rock. Unconformity refers to a break in the continuity of sedimentary rocks caused by erosion. Paraconformity appears when the beds above and below are parallel; no erosion-al surface is present. In any case, the unconformity results to a separation and/or deposition of two rock masses causing the sequence of geologic events (Unconformity 2007).Works Cited â€Å"Joint. † 2007. The Columbia Electronic Encyclopedia, 6th ed. , Columbia University Press. 9 December 2007 < http://www. infoplease. com/ce6/sci/A0826522. html>. Reches, Z. â€Å"Faulting of rocks in three-dimensional strain fields II. Theoretical analysis. † 31 March 2003. Technophysics. 9 December 2007 < http://www. sciencedirect. com/science? _ob=ArticleURL&_udi=B6V72-48894N0-2S&_user=10&_origUdi=B6V9D-3X2HYRH-S&_fmt=high&_coverDate=05%2F20%2F1983&_rdoc=1&_orig=article&_ac ct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=ca2e0b329475a6f5a70a37b5eda89e86>.Samaniego, A. â€Å"Stress, strain and fault patterns. † 30 July 1999. Journal of Structural Geology. 9 December 2007 < http://www. sciencedirect. com/science? _ob=ArticleURL&_udi=B6V9D-3X2HYRH-S&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=715c8aab57dd7baa2d89a90c55869bbd>. â€Å"Unconformity. † Sci-Tech Encyclopedia. 9 December 2007 http://www. answers. com/topic/unconformity? cat=technology.

An Overview of the Pathogens Biology in the Immune System

An Overview of the Pathogen's Biology in the Immune System The Immune system is the body’s overall defense system against harm causing invaders, that come from the outside world, that are able to inter the body one way or another. The immune system is not an organ or two that do all the work, but rather a network of parts all throughout the body that works with other bodily systems to fight off viruses, diseases, infections, and anything that the immune system knows does not belong in the body. A pathogen is any organism or virus that can cause a disease after entering the body. The first line of defense against pathogens are external barriers such as the skin. The nose has nostril hairs act like a filter for elements entering the body through the nose. The nose can also fill with mucus that can exit the body to get rid of any pathogens that might enter the nostrils. The eyes have eye lashes that can wave away pathogen’s when a person blinks. The average person blinks about 16 times a minute. That is typically enough to keep out pathogens floating in the nearby air. According to Campbell Essential Biology with Physiology 4th Edition (2012): External barriers also include chemical defenses in the form of antimicrobial secretions. Sweat, saliva, and tears contain enzymes that disrupt bacterial cell walls. Glands produce oils and acids that make the skin inhospitable to many microbes. Concentrated stomach acid kills most of the bacteria we swallow before they can enter the bloodstream. (p. 518) External barriers make up the first line of defense. When a pathogen does make it passed the barriers, it is now up to the internal immune system to fight it off. This is the second line of defense. Phagocytic cells are white blood cells that are able to consume foreign cells or pathogens, thus killing them. Another type of white blood cell that can kill off pathogens or infected cells are NK cells, or natural killer cells. These NK cells will discharge chemicals that kill infected cells. The body has another natural defense, which are defensive proteins. When a virus is successful in infecting a cell, the cell may release interferon molecules. These interferon molecules bind themselves to nearby healthy cells. The binding of interferon molecules to healthy cells prompts the healthy cell to produce antiviral proteins. Other natural defensive proteins that our immune system creates are complement proteins, which attack pathogens directly. (Simon, 2012, p. 519) The lymphatic system is a system of vessels and many lymph nodes that are crammed within white blood cells. Other lymphatic system organs include the tonsils, thymus, and the spleen. â€Å"The two main functions of the lymphatic system are to return tissue fluid to the circulatory system and to fight infection.† (Simon, 2012, p. 520) The lymphatic system works in conjunction with the circulatory system. For example, when someone gets a paper cut from a dollar bill, the dollar bill introduces bacteria into and under the skin. The first line of defense has already been penetrated. The lymphatic system will pick up on chemical signals that the skin has been torn, then send white blood cells via the arteries of the circulatory system to the paper cut site. The white blood cells will engulf the bacteria and cell debris, allowing the tissue to heal. If all the above fail to keep the body healthy, there is also a third line of defense, called adaptive defenses. â€Å"Adaptive defenses depend on white blood cells called lymphocytes that recognize and respond to specific invading pathogens.† (Simon, 2012, p. 521) These lymphocytes blood cells are triggered only after exposure to specific pathogens. The innate defenses are constantly prepared to combat a variation of infections, but lymphocytes must be primed by exposure to a foreign molecule. Any molecule that elicits a response from a lymphocyte is called an antigen. (Simon, 2012, p. 521). There are two types of lymphocytes cells, the first one is called the B-cell, and the second one is called the T-cell. One very interesting thing about this cells is how they develop. Both B-cells and T-cells form within bone marrow. The B-cells grow to maturity in the bone marrow, but the T-cells start in the bone marrow and are transported via blood to the thymus to finish growing to maturity. Paul A. Linnemeyer wrote: Macrophages are important in the regulation of immune responses. They are often referred to as scavengers or antigen-presenting cells (APC) because they pick up and ingest foreign materials and present these antigens to other cells of the immune system such as T cells and B cells. This is one of the important first steps in the initiation of an immune response. Stimulated macrophages exhibit increased levels of phagocytosis and are also secretory. (p. 1) It is very important the that the immune system functions well for the health of all human internal systems. If a pathogen that infected the digestive system entered the body and the immune system was not able to fight it off, it could cause damage to the digestive system to the point where the body could not digest food and therefore not get the nutrients needed to keep the body alive. If a pathogen that infected the respiratory system got into the body and the immune system could not fight off, it could affect the body’s ability to oxygenate its cells and cause the death of the person even though the pathogen itself may not be able to cause death. Likewise with the circulatory system. This clearly shows that a healthy immune system is a critical system to have, to keep internal systems healthy, which in turn keep the person healthy. As a result of having a low immune function, your body would have a harder time fighting off virus such as the cold and flu viruses, causing the symptoms to last longer. Infections can cause damage to the immune system, which further inhabits resistance to pathogens. HIV is a virus that causes acquired immune deficiency syndrome (AIDS) There are treatments for AIDS, but no cures. People living with AIDS tend to have to change their life style. When someone first finds out that they are HIV positive there can be a wide range of feelings including of anger, sadness, depression fear, anxiety. This can cause much stress or the carrier of the HIV virus and their families. In some cases having or treating AIDS can affect the brain. This can cause clumsiness, sudden shifts in behavior, difficulty paying attention, and forgetfulness, among other problems. (University of California, August 03, 2011) In conclusion, The immune system is one of the most important systems in the human body. The immune system can interact with other bodily systems in a variety of ways. The immune system has three primary lines of defense, the exterior barriers, the internal innate defenses, and the internal adaptive defenses. Without an immune system, humans would die very easily due to many things. But with an immune system, humans can hope to survive and thrive despite the many things that can infect them.

Trading Infrastructure Case Study Example | Topics and Well Written Essays - 1000 words

Trading Infrastructure - Case Study Example The selection of the distribution channel depends on the market segment which the ceramics companies are targeting. The ceramic company must know the specific market segment and target customers it wants to get. Moreover, there must be a producer-distributor fit in which the two companies must complement their marketing policies, strategies and image. When the company sees fit, it may come up with an assessment of its previous performance of its experience and track record over the years. The wholesalers constitute a significant bulk of the ceramic trading operations carried out by well-established Australian ceramic companies. The wholesalers buy from the major producers and these companies sell it in small quantities to the retailers. These companies have also built their design and artistic excellence on ceramics products over decades of research and innovation. These companies ask foreign and local ceramic designers to constantly come up with creative designs with functional applications. Innovative styles are adopted and fusion of designs is also fostered. Hence, Australia's ceramics industry which combines European designs with Asian elegance is truly world-class. Only one major Australian company imports high-quality ceramics from the United States and the UK.( see www.countryprofile.com) The trading operations of the wholesalers are done both on a cash and credit basis. Wholesaler ceramic companies agree on specific banking and financial institutions to settl e their transactions. The ceramic companies engage in wholesale and retail trade of ceramics and ceramic-related products. Operations of wholesalers are highly flexible and the companies can deliver bulk orders with advance notice( what others offered serves). Note: This sentence means that only wholesalers can deliver bulk orders. The retailers and agents cannot since these have limited capital. This is the meaning of this sentence. Agents refer to Australian companies which cater to the international market. Ceramic agents have a high degree of international training and sales motives and performance. Agents can be run by a single individual or a marketing team. Example of international agents include Janet Mansfield, Aremco and Ceramic Solutions. Retailers are the small and medium scale ceramic businesses which are run independently by well-known resident ceramic artists. There are 300 registered ceramic retailers(.check the directory of ceramic suppliers of the Australian ceramic industry and tile council.) The retailers have a stronger personal relationship with the final end-users of the products. Retailers are able to carry a wide array of ceramic products. Retailers can offer credit for their customers. However, the outputs of these small ceramic businesses constitute less than 10% of the output of the entire industry( .(Please add up the revenues of the wholesalers which I placed in this article. Their output is much higher than the retailers.) These outputs are geared towards special individual collector's editions of a select group of ceramic collectors in Europe and in the US. The customary mark-ups for this industry ranges from 10% for retailers, 15% for wholesalers to 30% for highly specialized ceramic manufacture rs which caters to individual collectors (.This is the mark-up of similar export-based craft businesses similar to ceramics. Big producers

Analyzing argement Essay Example | Topics and Well Written Essays - 1250 words

Analyzing argement - Essay Example In â€Å"Execution,† Anna Quindlen argues that death penalty is wrong because it does not achieve its desired ends. She stresses that it cannot provide sufficient justice for victims and their families and it does not make any moral sense. These authors have similarities in the use of personal ideas and anecdotal and hypothetical evidence as evidence, logos through inductive reasoning and agreement on death penalty’s goals, and pathos through an empathic writing style that appeals to justice, although they differ in writing style, audience, and attitude toward death penalty. Quindlen is more persuasive than Mencken because her ironic tone emphatically argues that death penalty is wrong because it is simply morally insufficient as a form of retribution. These authors have similarities in the use of personal ideas and anecdotal and hypothetical evidence. Mencken talks about his personal ideas when attacking the opponents of death penalty. He argues from his personal viewpoint that crime deterrence is not the only goal of death penalty, and instead â€Å"katharsis† is â€Å"practically considered† and â€Å"more important† (1). By saying this, he shows that something more personal and emotional is behind the need for death penalty. Quindlen also offers her personal ideas on death penalty. She admits that her â€Å"guts† â€Å"govern† her ideas on death penalty, which is why she can be â€Å"hypocritical† about it (450.3). Like Mencken, Quindlen personalizes her attack on death penalty by asserting her personal feelings toward it. In addition, both authors use anecdotal evidence as proof for their arguments. For instance, Mencken says he has not heard any executioner who is complaining of his job and instead, he has â€Å"known many who delighted in their ancient art, and practiced it proudly† (1). By saying ancient art, he is underlining the proud tradition behind death penalty. Quindlen also uses anecdotal evidence when she says that the justice system is

Differences between bourbon, scotch, and whiskey Research Paper

Differences between bourbon, scotch, and whiskey - Research Paper Example With the increased popularity, there was major attention from the Scottish parliament which led to major taxes on malt and the end products by the 17th century. These taxes led to the distillers to go underground for their operations. Even so, the business was high. The name ‘Whisky’ has been derived from the word gaelic uisge (usky, which went on to be mispronounced as whisky) – meaning ‘water of life’ (Heart of Scotland). Scotch Whisky is renowned for the fact that they are made only in Scotland. Whisky that is made in Scotland alone have the patented right to be referred to as ‘Scotch’. Also, the Scotch Whiskies are single malt and these are known for the smoothness and the style of distillation. The development process of Scotch Whisky is labor oriented and generally involves a high level of craftsmanship for the development of the end product (Whiskey.com). Whiskey links back to the migration of Moors in Western Europe however Bourbon Whiskey is relatively a much more recent version of Whiskey. This originates from Pennsylvania and the key ingredient here is ‘rye’. The drink started using corn as the primary ingredient once the brewery was moved to Kentucky. This was the birth of bourbon. It is important to realize that all bourbons are whiskeys however not all whiskeys are bourbons (Denison). There are a number of different variations that are used for the production of Bourbon. Of these the most commonly sold in United States includes sixty to seventy percent corn mash. However in most of the processes a little rye is added as well, as it provides the distinct flavor and spice. One of the most well known brands across the world, i.e. Jack Daniels has always been confused with bourbon; however there is a vast difference in the ingredients and the development process . The main differences is owing to the fact that Jack D aniels is charcoal filtered and goes through sugar – maple charcoal prior to the barreling process

Principles of War, Clausewitz and Jomini Essay Example | Topics and Well Written Essays - 750 words

Principles of War, Clausewitz and Jomini - Essay Example It is worth noting that Clausewitz work very dialectically constructed; continuously, Clausewitz follows his declarations with sound arguments, which are intended to strengthen the principle being advanced (Clausewitz 1976). Clausewitz work presents warfare as an act of politics and emphasizes on the element of war as being more an economic, a psychological, and a political contest. Therefore, in terms of strategy, Clausewitz work and theories is more relevant compared to the theories by Jomini. Clausewitz works advances arguments mostly for the superiority of using defense. A clearer element of Clausewitz work is its exploration of the use of popular and partisan opinion. Therefore, the contrasting aspect of these two war theorists is that, for Jomini, his work was concerned more about maneuver, a war-fighting function widely used in the 19th century battlefields. On the other hand, Clausewitz work was in its outlook, strategic and mainly focused on the art of war. In short, the elements of Jomini’s work were offensive and maneuver kind of war, whereas the elements of Clausewitz work was characterized mostly by chance, violence, and reasons as the key elements. These theorists of war each emphasized certain warfare principles. We first look the principles advanced by Jomini. First, we must realize that the warfare principles advanced by Jomini, now referred to as Jominian principles were mostly designed for wars that were fought earlier under very different views about wars and circumstances. One of the principles of war that Jomini emphasized was the â€Å"line of operation.† According to him, this was an essential warfare principle, which he categorized as topographical barriers, i.e., natural lines of operation. He referred to this as the strategic choices and territorial lines, i.e., how and where to fight. He referred to this as â€Å"maneuver lines.† In addition, Jominian principles of warfare were mostly centered upon the key argument that an effective and successfully war had to adhere to strategy controlled by several consistent principles (Jomini 2008). These principles focused more on the massing of forces, the off ensive, and attacking an enemy force that is weaker at a very decisive point. In comparison to Clausewitz, Jomini looked at war in terms of clarity and simplicity. He viewed war in heroic and personal terms. Clausewitz considered warfare to be a complex, tragic affair that is always under the threat of escaping human control. Clausewitz viewed the war subject in a manner consistent with the eighteenth century Romanticism. The main principle of war that Clausewitz work advanced was that the art of decision-making and war defied the habit

Summary Assignment Example | Topics and Well Written Essays - 500 words

Summary - Assignment Example The authors work with Elizabeth Brainerd is based on two hypotheses. Firstly, competitive industries do not have discrimination, so in case of an exogenous shock (increased trade) the effect of discrimination is negligible. Secondly, in less competitive industries, scope of discrimination is more, so in case of the same exogenous shock narrowing the gender wage gap would be considerable. Since theoretically, the wage differential in competitive industries is nil, by providing for increased trade, the authors could compute the gender wage gap in concentrated industries. The survey covering the period 1977-94 used data from Current Population Survey. The population comprised of individuals aged 18 to 64 and working as full time. First log wage of all individuals was regressed on education, age, agesqaured and nonwhite dummy variable. Then the residual gender wage gap was computed from difference in average residual wages for male and female at industry level. The industry level results were matched to trade level results, with trade measured as import shares. The findings show that an increase in import share leads to reduction in gender wage gap in concentrated industries. However overall increase in trade have a negative impact on relative wages of women. These results can also be factored on decline in unionization and not discrimination impact.