Destroying the Rain Forests: Human effects on Natures Essay examples --

Destroying the Rain Forests: Human effects on Natures The rain forests are one of the most unique places on the planet earth. They are home to several thousand species of animals that live no where else in the world1. They are also one of the primary sources of oxygegn of the world. One cannot even begin to describe the sheer beauty of the rain forests. However, the interaction of man with these marvels of nature has had a negative effect. Through agriculture, societal development and the search for raw materials mankind is destroying these marvels of nature. The rain forests are a display of the negative effects of humans on nature. One of the biggest destroyers of the rainforest is farming. Farmers in areas inhabited by the rainforest are cutting down, burning and taking over the rain forest land to make room for farming. These lands once inhabited by the beautiful forests are being turned into crop fields and cattle pastures. This would have to happen if the farmers used efficient farming methods. Most of the farmers however are chopping and burning the rain forests to make fertile land, and then draining the life out the land by overusing it2. They then move on and take out more land to farm with. These farmers are taking out the rainforests at an enormous rate. They are however not the only source of rain forest destruction. Another cause of deforestation of the rain forest is the population growth of humans3. The population is growing at an enormous rate. As population grows so does the search for space. In tropical climates rainforests occupy forty-nine percent of the land and twenty-five percent of the land is covered by closed rain forest4. Parts of Asia and Africa are covered by as much as forty-one percent ra... ...an, 103 8. Bawa, Kamaljit, and McDade, Lucinda, eds. La Selva: Ecology and NaturalHistory of a Neotropical Rain Forest. Chicago: University of Chicago Press, 1994. 109 9. Bawa, 154 10. Jordan 333 11. Barraclough, 184 12. Barraclough, 316 13. Bawa, 201 14. Jordan, 35 15. Barraclough, 21 Bibliography. - Barraclough, Solon L., and Ghimire, Krishna B. Forests and Livelihoods: The S.ocial Dynbamics of Deforestation in Developing Countries. New York: St. Martin’s Press, 1995. - Bawa, Kamaljit, and McDade, Lucinda, eds. La Selva: Ecology and NaturalHistory of a Neotropical Rain Forest. Chicago: University of Chicago Press, 1994. - Jordan, C.F., Ed. An Amazonian Rain Forest: The Structure and Function of a Nutrient Stressed Ecosystem and the Impact of Slash-and-Burn Agriculture. Athens, GA: UNESCO, 1989.

Divorce and American Culture

Culture surrounds us everywhere we go. It reflects the people of the times and when it changes, so do the very people it reflects. A general definition would say that culture, related to society, is a set of norms that govern behavior. Within this set of norms the people of a society do certain rituals and behaviors to fit in with the world around them. Different trends rule the times. Whether it be anti-war protests, to civil rights movements, to legalization of same sex civil unions and even divorce-the people of the times roll with many different ideas and tendencies. The idea of marriage is an old and sacred one. In the Bible, a marriage is seen a holy sacrament between a man and woman that leads to the raising of a family. There is one man and one-woman involved- then with the addition of the holy spirit, the union is supposed to be ever lasting. â€Å"Christian marriage is a sacrament (sacred act approved by God). As a result marriage was very difficult to end, and before the nineteenth century usually ended with death,† (Chan and Haplin, 2001). In the world today, marriage is interpreted in many different ways. Very rarely is it seen as an everlasting contract that can withstand all tests. The revolutions of the 60s, 70s, up through today have severely changed the way people think of marriage. The drug culture has helped redefine the meaning of peace and love and of course, holy unions. People today do not get married out of the idea of love. If they do, it is most often between two young and naive children or young adults that believe that love can conquer all. â€Å"People expect too much from specialized love marriages, and when the love goes so might the marriage. Other cultures unite families through arranged marriages, and these social functions may make them more stable,† (Chan and Haplin, 2001). People have begun to take advantage of the system and get married because of benefits they can receive. For the military couple, extra cash is a big incentive as well as extra leave time. A lot of times the benefits outweigh the costs and people today go into marriages knowing that it will be just as easy to exit the marriage. For a marriage to end, there needs to be either a death or a cause for divorce. Grounds for divorce include; a cheating spouse, an abusive partner, and mishandling of funds. Every so often though, there is no direct cause, but instead the couples just are not compatible. The constant fighting and disagreements make it difficult to raise a family and have a stable home. As society grows and culture changes, divorce still remains. In the early parts of the 20th century, divorce was a taboo idea that meant that you ultimately failed as a wife or husband. People viewed it as the easy way out and very rarely did they agree with it. In the 1950s, divorce was only 5 per 1000 women, as opposed to the rate of 20 per every 1000 women in the early 21st century (Relationships, 2008). The times influenced peoples decisions and instead of doing what might have been best for all the parties involved, couples stayed together so that they would not be viewed as such a failure to their friends, family and children. Culture put the message out to society that a divorce is an end all be all decision that means that you have failed. Of course, logically that is not true. Occasionally things do not go according to plan and you have to change your idea of the future accordingly. The idea of being a failure comes from the society that surrounds the couple. As the times began to change, so did the overall idea of separation and divorce. The more married couples got divorced, the more casual the idea has become. When a couple divorces and they have children, the children see the process and although it might hurt them tremendously, it also makes them learn and see things. As they see the process, the idea becomes to seem â€Å"normal† to them. According to a recent journal article, â€Å"growing-up in a divorced family can instill offspring with less unfavorable attitudes towards divorce (Greenberg and Nay 1982, Amato 1988, Trent and South 1989, Axinn and Thornton 1996, Kapinus 2004 as cited by Hiller and Recoules 2011). Sometimes the children involved begin to think that this is a normal thing that happens and makes it easier to do themselves. This could explain the rising divorce rates today. On the other hand, often times when a child witnesses the struggles of divorce, they are sometimes more reluctant to get a divorce themselves (Hiller and Recoules, 2011). The inevitable hurt and suffering from witnessing countless hours of parental figures fighting, getting sometimes physical, and the mental and emotional strains that the fighting causes sends some children into a downwards spiral. Their whole attitude on love in general is questioned. And from first hand experience, the sanctity of marriage itself is questioned. An idea that some children used to find so uplifting and amazing, now seems bleak and not worth it. If the two people I love the most in the whole world cannot seem to get along, and cannot make it work, then what are the chances that my marriage will fail? What is the point in even trying? Is love just another silly Disney ideation that really cannot exist in our world today? â€Å"American society may have erased the stigma that once accompanied divorce, but it can no longer ignore divorce's massive effects† (Fagan and Rector, 2000). Married couples do not always understand that their fighting and arguments are a lot bigger than just the two of them. It reaches out and branches down to all the people they know. Subsequent relationships between children and their partners become affected. Sometimes girls go crazy and give up on the concept of love and become promiscuous at a young age. They eventually fall into a routine and thanks to the invention of birth control, have no qualms and avoid the pregnancy scare that might have once deterred them otherwise. Boys may become rude and hostile towards their partners and begin to treat their ladies badly in response to how they see their fathers treat their mothers. Coworkers, neighbors, children, friends, everyone is affected. Some articles claim that the divorce rates among young adults today are lower than that of the past. This might be true, but this does not take into account the idea of young relationships failing. Couples that never got married, but might have had children at a young age with no intention of getting married and consequently leading to a single parent and broken home anyways. There was no sacrament done, but the damage still is the same. Repeatedly it is seen that parents will reluctantly â€Å"stay together† for the kids. This is a great idea on paper. It would seem that if the parents were to stay together, that the children would not suffer from the emotional and psychological damage done to a child because of a divorce. What is often overlooked is the fact that if parents stay together, and clearly are not compatible and cannot communicate like adults and actually raise the children, then the child will most likely suffer just as much or even more so than the child with divorced parents. Often times negative traits are learned from the parents during times of arguments that will debilitate the growth of the child. Negative traits would include, harsh tempers, awful communication skill development, and negative views of either parent based on the idea that parents will most likely isolate the children and try to get each on â€Å"their side. The strain of choosing between the two parents puts many over the edge. Children will sometimes develop different drinking or substance abuse problems in order to deal with the problems that they are facing at home leading to failing or dropping out of school, unwanted pregnancies, and even dangerous automobile accidents. â€Å"†Don't stay together just f or the sake of the children. † â€Å"If divorce is better for you, it will be better for your kids. † (Spohn, n. d. ) As the times are continually changing, so do the basic ideas that fuel society as a whole. Divorce rates will rise and fall with the times depending on society and culture. It is a trend that cannot be predicted and cannot be ignored. The overall effect of divorce is an everlasting one and before any decision is made about either marriage or divorce, all the options and pros and cons should always be weighed. Reference: Hughes, R. (2008, August 20). What is the current divorce rate in the United States? Has the divorce rate changed much over the past 5 to 10 years?. MissouriFamilies. org Home. Retrieved July 20, 2011, from http://missourifamilies. org/quick/divorceqa/divorceqa3. tm Fagan, P. , ; Rector, R. (n. d. ). World and I Magazine – The Effects of Divorce in America. Online Magazine: The World ; I Online Magazine. Retrieved July 20, 2011, from http://www. worldandi. com/specialreport/divorce/divorce. html Sociology of Divorce (GCSE). (n. d. ). The Adrian Worsfold Website. Retrieved July 20, 2011, from http://www. change. freeuk. com/learning/socthink/divorcesi mpler. html Spohn, W. C. (n. d. ). The American Myth of Divorce. Santa Clara University – Welcome. Retrieved July 16, 2011, from http://www. scu. edu/ethics/publications/iie/v9n2/divorce. html

Prosthetic Limb Research Paper Essay

Prosthetic limbs all started with a very simple problem. Do you just give up hope when you lose an arm or a leg, or is there some other way to make the best of a situation? Hope was not given up by us persistent human beings and that is how artificial limbs were thought of. Instead trying to get around, we thought of artificial legs to help those who have lost them. Instead of only having one arm, we thought of artificial arms to be able to have two again. Prosthesis not only brought hope to those who were seriously injured and lost their limbs, but it helped these people bring their lives back to as normal as it could be. Of course prosthesis did not start off as being perfect and high tech, but they slowly progressed throughout thousands of years to the technology we have today, as well as the ideas we have for the future. Artificial limbs date back all the way to the times of the ancient Egyptians. These were very basic prosthetics and were made from the materials they had readily available such as wood, iron or leather. Alan J. Thurston discusses the early Egyptian prosthetic, â€Å"One of the earliest examples comes from the 18th dynasty of ancient Egypt in the reign of Amenhotep II in the fifteenth century BC when members of an Egyptian–German mission working in the Sheikh Abdel-Gurna area of the Theban necropolis were carefully brushing away accumulated dirt from the burial shaft inside the rockhewn tomb of Mery, a priest of Amun. The mummy that is on display in the Cairo Museum has clearly had the great toe of the right foot amputated and replaced with a prosthesis manufactured from leather and wood (Fig. 1). An even older example comes from the fifth Egyptian dynasty (2750–2625 BC) discovered by archaeologists, as being the earliest known splint from that period† (Thurston 1114). The ancient Egyptians and other early cultures to use prosthetics did so not only for the physical need for them, but to have a feeling of being whole and complete. Many cultures feared amputation over death because they wouldn’t be whole in the afterlife. So if a person had to have an amputation and had a prosthetic put in place, they would save their old limb and be buried with it so they would have their whole body in the afterlife with them. The first written record of artificial limbs was from around 3500 BC. It was a poem written by Rig-Veda and was about a queen who lost her leg in battle and had an iron prosthesis put in place to where her leg was supposed to be so she could return to battle. The next recorded records of prosthetics that were actually made for rehabilitation came from the ancient Roman and Greek civilizations. â€Å"The books by the Greek historian Herodotus of Halicarnassus, report a prosthetic replacement. Herodotus states that in 484 BC, a Persian soldier escaped imprisonment by cutting off his leg then replacing it with a wooden prosthesis. The report states that he was able to travel 30 miles to Tregea. He was unfortunately captured by Zaccynthius and was promptly decapitated. This has been validated with the finding of a copper and wood leg in Capri, Italy, in 1858, which has been dated to 300 BC (Fig. 2). 5 Lower-limb prostheses of the time were typically made of bronze plates with a wooden core and leather straps† (1114). As seen here, this was the first step to actually have a limb that served a function to help the man walk. The concept of an artificial limb had slightly progressed and become a better tool. The next stage of prostheses came from around 450-1000 A. D. These are the typical peg legs that people think of and are typically thought of as what pirates like â€Å"Captain Hook† had. Peg legs made of again wood, leather or metal were used to help people walk. â€Å"Hook hands† were also made to replace people who lost a hand. â€Å"This style of prosthesis that is basically a modified crutch with a wooden or leather cup persisted into the early part of the twentieth century (Fig. 3). The use of these basic materials persisted until relatively recent times and many examples have survived. † (1114). So for many years people were content with this simple type of prosthetic limb and it wasn’t for about 500 years until it began to progress into something better. The next â€Å"wave† of prosthesis came from Ambroise Pare, a Frenchman born in 1510. He was a surgeon for the French Army and was prominently known for his treatment to gunshot wounds. He also made great progress in artificial limbs. â€Å"His ‘Le Petit Lorrain’, a mechanical hand operated by catches and springs was worn by a French Army captain in battle. He also devised an above-knee prosthesis consisting of a kneeling peg and a prosthetic foot. It had a fixed equinus position, a locking knee and a suspension harness, features that are still in use today† (1117). This hand was the starting point for the advanced prostheses in existence today as well as the leg he developed. It was the first successful leg to have the locking knee, suspension harness and the equinus position and it set the bar for other prosthetics to come. Also Pare was the first to make a prosthesis with joints; â€Å"The leg he designed for amputation through the thigh is the first known to employ articulated joints† (Wilson Jr. 2). The next wave of progression with artificial limbs came from the Civil War, and with anesthetics present, the surgeries were improved tremendously. Also the United States government paid for prosthesis for war veterans so they became more common. There was unfortunately not much advancement in prosthesis during this time period; â€Å"Many patents on artificial limbs were issued between the time of the Civil War and the turn of the century, but few of the designs seem to have had much lasting impact†(6). World War I also didn’t create much advancement in artificial limbs because of low casualties and the depression. After World War II , prosthetic research developed the beginnings of the prostheses in widespread use today† (Spaeth vii), in what was called the Artificial Limb Program. They even further developed artificial limbs by making things such as; â€Å"the patellar-tendon-bearing (PTB) below-knee prosthesis, the quadrilateral socket and accompanying method of alignment, the Henschke-Mauch hydraulic knee unit, a totally new armamentarium for management of upper limb amputees, and the amputee clinic team of concept. Of tremendous significance was the emphasis on early fitting and saving the knee when amputation was necessary due to arteriosclerosis†(6). All of these progressions were very important in changing prosthetics from a simple peg leg to the types of artificial limbs present today. If it weren’t for these, we wouldn’t be nearly as advanced in the field or prosthetics and would be far behind. From here many organizations were made in order to support amputees. Also because the profession of being a prosthetist was only taught by experienced prosthetists and there was no other way of learning available, the University of California started offering classes in around the 1950’s. With classes now available about artificial limbs, this also encouraged a â€Å"take-off† in the field and brought great awareness to the public. From here classes began to expand to universities such as â€Å"New York University and at Northwestern University Medical School in Chicago†(8). After these schools began teaching, many colleges and universities began to follow and the field began to expand. The next milestone for artificial limbs came in 1965 when the Medicare bill passed. This bill gave people over the age of 65 little to no cost to receive an artificial limb. So because of this, the need for prosthetics increased and more and more studies were made on them. This leads us all the way to the prosthetics available today in 2012. The next progression of artificial limbs came from about 1945-1970 with the idea of bionic arms, or artificial limbs controlled by electricity. It would use myoelectric control to power the limbs; â€Å"The concept of a myoelectric prosthesis is simple. The electrical activity naturally generated by contracting muscle in a residual limb is amplified, processed and used to control the low of electricity from a battery to a motor, which operates an artificial limb (Muzumdar 1). It was the Germans who first claimed to be able to accomplish this feat, but it would be extremely difficult to make the limb look and feel normal. Reinhold Reiter was the first one to implement myoelectric control in 1945. His prototype however was not realistic because it was not portable. His prototype was essentially never going to work, but his beginnings of research on myoelectric control started a new wave in artificial limbs. This then sparked a worldwide quest to successfully control myoelectric electricity. Major countries began to compete and try to progress to successfully make a myoelectrically controlled prosthetic. The United States became close to having a successful and efficient one, but logistics problems caused the procedure to be unsuccessful. Then in the turn to the 60’s a Russian scientist named A. Y Kobrinski was able to create a â€Å"self-contained myoelectric control system. This was one of the first stand-alone, battery-powered systems to be used on a number of amputees† (56). Between the 70’s and the 80’s many different types of the â€Å"new† artificial limbs were used on adults as well as children. They were very successful and many people benefited from them. During this period, myoelectric hands were the main myoelectric powered prostheses. Competition sprang between corporations during this time period and they looked to make artificial limbs lighter and more efficient. Then in the 90’s, prosthetics began to be powered by computer technology â€Å"During the 90’s, the myoelectric prosthesis industry began to turn towards computer technology to provide programmable controls systems. These advanced controllers can be adjusted, while on the patient, to give a variety of functions from one or two electrode sites† (57). This computer technology leads all the way to the types of artificial limbs present today. Battery technology has also increased tremendously during the past years, which gives the prosthetics greatly improved battery life. Artificial limbs today are extremely efficient and the batteries last a long time. Also the computer technology available creates greater memory for movement and control, which allows the prosthetics to feel more natural. The artificial limbs today vary greatly depending on the need of the patient. There are cosmetic prosthetic limbs, also called a cosmesis. These are the prosthetics that look exactly like real limbs. â€Å"Advanced plastics and pigments uniquely matched to the patient’s own skin tone allow a modern day cosmesis to take on an amazingly life-like appearance. Even details such as freckles, hair and fingerprints can be included, bringing the cosmesis to the point where it’s nearly indistinguishable from the original missing arm or leg† (Clements 5). There are also the basic artificial limbs which just serve the purpose to walk and aren’t as natural looking. An example of this could be the prosthetics you see the runner in the Olympics wearing. Regardless, the essential components of prosthetics are generally the same. They are composed of the plyon, which is the skeletal frame for the limb and the main support. Today these are generally made of lightweight but strong metals such as carbon fiber components. Next there is the socket, which connects the artificial limb to the stub where the patient’s limb used to be. It is very important the socket is built correctly or it can cause further damage to the patient; â€Å"Because the socket transmits forces from the prosthetic limb to the patient’s body, it must be meticulously fitted to the residual limb to ensure that it doesn’t cause irritation or damage to the skin or underlying tissues† (3). The next and final essential component is the suspension system. This is the part that makes the artificial limb stay connected to the body and not fall off. This is generally done by a suction system, which uses an airtight seal to prevent the limb from falling off when it’s pushed on. Prosthetic limbs today are all unique in their own way. The type of amputation and where the limb is cut off all has a great effect on the type of prosthetic limb needed. A below the knee prosthetic for example is far different from an above the knee. The above the knee prosthetic will need an articulated knee and takes much more technology to make. It also needs to attach to different nerves as well as many other factors. One problem with these high tech limbs however is their price. Prosthetic limbs are extremely expensive, and the more high tech they are, the more expensive they become. There are even some prosthetic limbs today that use microprocessors and can remember your body movements; â€Å"Advanced prosthetic legs can be equipped with a microprocessor (computer chip) and sensors that measure angles and forces while a patient walks. Over time, the microprocessor learns how the patient walks and constantly adapts the stiffness of the knee accordingly† (5). This is an example of the type of limb that would cost a patient tens of thousands of dollars. One of the really cool and amazing prosthetics technology today has brought us to is the targeted muscle reinnervation or TMR. It was developed by Dr. Todd Kuiken and it has to do with controlling artificial limbs with your brain. When a person loses a limb, he created the idea to attach the nerves from that limb to a muscle close by that contributes to moving the â€Å"former limb†. When this is done and the patient goes to try to move the â€Å"used to be limb† it then is able to send electrical currents, which causes Kuiken’s prosthetic limbs to move. This breakthrough he made is fascinating and extraordinary and opens doors to artificial limbs of the future.

Free Essays on A Good Role Model

It is easy to answer some hard questions such as what does DNA (Deoxyribonucleic acid) stand for. One who studies in microbiology gets that answer in one second. For some easy questions, where does your character and personality come from? it is hard to answer such easy questions. One needs more time to get the answer. Psychologists may be concerned about one’s childhood period and family environment. The character and personality is under the control of inherited genes but also is influenced by the environment. It is generally believed that the influence came from a family member during the childhood period and would spread to adulthood. To make a good character and personality for children, a family member needs to be a good role model. The essay â€Å"An American Childhood† by Annie Dillard is a good example of how a family member has influence on the children. This essay expresses her idea about her mother when the author looks back at her young age. Children will copy his or her character from the nearest person around them and develop this process until they mature. Family members would be the biggest influence to young children. A young girl imitates her mother and a young boy imitates his father, respectively. From the essay, Dillard said a lot about her mother’s character and emotion in many points. Her mother is a strong and independent woman. The author says, â€Å"She was an unstoppable force; she never let go†(210). She means that her mother has strong energy to get something done and she never stops until it is accomplished. Her mother’s character might differ from other ordinary women at the same time in the early 1960’s. Her mother develops the seed of character and p ersonality, which is the great impact and influence on her. For example, her mother questioned her about her assumption that Eisenhower would win the election. â€Å"How do you know?†(210) her mother questioned her. She said that everyone says that ... Free Essays on A Good Role Model Free Essays on A Good Role Model It is easy to answer some hard questions such as what does DNA (Deoxyribonucleic acid) stand for. One who studies in microbiology gets that answer in one second. For some easy questions, where does your character and personality come from? it is hard to answer such easy questions. One needs more time to get the answer. Psychologists may be concerned about one’s childhood period and family environment. The character and personality is under the control of inherited genes but also is influenced by the environment. It is generally believed that the influence came from a family member during the childhood period and would spread to adulthood. To make a good character and personality for children, a family member needs to be a good role model. The essay â€Å"An American Childhood† by Annie Dillard is a good example of how a family member has influence on the children. This essay expresses her idea about her mother when the author looks back at her young age. Children will copy his or her character from the nearest person around them and develop this process until they mature. Family members would be the biggest influence to young children. A young girl imitates her mother and a young boy imitates his father, respectively. From the essay, Dillard said a lot about her mother’s character and emotion in many points. Her mother is a strong and independent woman. The author says, â€Å"She was an unstoppable force; she never let go†(210). She means that her mother has strong energy to get something done and she never stops until it is accomplished. Her mother’s character might differ from other ordinary women at the same time in the early 1960’s. Her mother develops the seed of character and p ersonality, which is the great impact and influence on her. For example, her mother questioned her about her assumption that Eisenhower would win the election. â€Å"How do you know?†(210) her mother questioned her. She said that everyone says that ... Free Essays on A Good Role Model It is easy to answer some hard questions such as what does DNA (Deoxyribonucleic acid) stand for. One who studies in microbiology gets that answer in one second. For some easy questions, where does your character and personality come from? it is hard to answer such easy questions. One needs more time to get the answer. Psychologists may be concerned about one’s childhood period and family environment. The character and personality is under the control of inherited genes but also is influenced by the environment. It is generally believed that the influence came from a family member during the childhood period and would spread to adulthood. To make a good character and personality for children, a family member needs to be a good role model. The essay â€Å"An American Childhood† by Annie Dillard is a good example of how a family member has influence on the children. This essay expresses her idea about her mother when the author looks back at her young age. Children will copy his or her character from the nearest person around them and develop this process until they mature. Family members would be the biggest influence to young children. A young girl imitates her mother and a young boy imitates his father, respectively. From the essay, Dillard said a lot about her mother’s character and emotion in many points. Her mother is a strong and independent woman. The author says, â€Å"She was an unstoppable force; she never let go†(210). She means that her mother has strong energy to get something done and she never stops until it is accomplished. Her mother’s character might differ from other ordinary women at the same time in the early 1960’s. Her mother develops the seed of character and p ersonality, which is the great impact and influence on her. For example, her mother questioned her about her assumption that Eisenhower would win the election. â€Å"How do you know?†(210) her mother questioned her. She said that everyone says that ...

A Guide to Plankton

A Guide to Plankton Plankton is a general term for the floaters, the organisms in the ocean that drift with the currents. This includes zooplankton (animal plankton), phytoplankton (plankton that is capable of photosynthesis), and bacterioplankton (bacteria). Origin of the Word Plankton The word plankton comes from the Greek word planktos, which means wanderer or drifter. Plankton is the plural form. The singular form is plankter. Can Plankton Move? Plankton are at the mercy of the wind and the waves, but not all are completely immobile. Some types of plankton can swim, but only weakly or vertically in the water column. And not all plankton are tiny - jellyfish (sea jellies) are considered plankton. Types of Plankton Some marine life goes through a planktonic stage (called meroplankton) before they become frees of animals that have a meroplankton stage are corals, sea stars (starfish), mussels and lobster. Holoplankton are organisms that are plankton their entire lives. Examples include diatoms, dinoflagellates, salps, and krill. Plankton Size Groups Although most people think of plankton as microscopic animals, there are larger plankton. With their limited swimming capability, jellyfish are often referred to as the largest type of plankton. In addition to being categorized by life stages, plankton can be categorized into different groups based on size. These groups include: Femtoplankton - Organisms under 0.2 micrometers in size, e.g., virusesPicoplankton - Organisms 0.2 micrometer to 2 micrometers, e.g., bacteriaNanoplankton - Organisms 2-20 micrometers, e.g. phytoplankton and small zooplanktonMicroplankton - Organisms 20-200 micrometers, e.g., phytoplankton and small zooplanktonMesoplankton - Organisms 200 micrometers to 2 centimeters, e.g., phytoplankton and zooplankton such as copepods. At this size, the plankton are visible to the naked eye.Macroplankton - Organisms 2 centimeters to 20 centimeters, e.g., like ctenophores, salps, and amphipods.Megaplankton - Organisms over 20 centimeters, like jellyfish, ctenophores, and amphipods. The categories for the smallest plankton sizes were needed more recently than some others. It wasnt until the late 1970s that scientists had the equipment available to help them see the great number of planktonic bacteria and viruses in the ocean. Plankton and the Food Chain A plankton species place in the food chain depends on what type of plankton it is. Phytoplankton are autotrophs, so they make their own food and are producers. They are eaten by zooplankton, which are consumers.   Where Do Plankton Live? Plankton live in both freshwater and marine environments. Those that live in the ocean are found in both coastal and pelagic zones, and in a range of water temperatures, from tropical to polar waters. Plankton, As Used in a Sentence The copepod is a type of zooplankton and is a primary food for right whales. References and Further Information: Australian Museum. What Is Plankton?  Accessed October 31, 2015.Bigelow Laboratory. Cycling Through the Food Web.  Accessed October 31, 2015.Microbial Grazers Lab. Marine Biological Laboratory at Woods Hole. Accessed October 31, 2015.

A Person as the Property Speech or Presentation

A Person as the Property - Speech or Presentation Example According to the research study today, slavery today is illegal and is abolished by many countries around the world as they consider the act barbaric and overtaken by time. The international laws and treaties including domestic laws in the individual countries consider the trade illegitimate and recognize it as abuse of human rights. Slave trade has done more harm than good ultimately, a part from denying people their rights as enshrined in the constitutions, and it has also deprived the society of able population culminating into loss of artisanship and abject poverty in the zones.This essay stresses that  slavery started long time ago with several slave dealers scattered all over the world especially in Africa. The few rich dealers in slavery organized for the capturing of able-bodied people, which were then taken to the market for purchase by the merchants. Slaves were captured in a brutal exercise that left many people maimed and killed. The villages were deprived work force si nce there was extraction of those who could economically improve the status of the society. The slaves were then assembled in designated areas that were used as markets through which the prospective buyers met the sellers. After the purchase, slaves would be taken to diverse areas where demand was rife, for instance, others would be taken to US, Europe, Asia et cetera.  The sultanate that was based in Zanzibar abetted the trade and these made most of the population from the region to be taken to the Middle East as slaves.... The system of capturing slaves both in the Arabic world and in the rest of the world remained more or less the same. Most of the slaves that were captured by the Middle East traders though were largely drawn from Mediterranean, Turkic, and Persians (Marmon 113). This trend also spread to other parts of the world and reached African continent as a new area for acquisition of the slaves. Following the establishment of the Omani rule in Eastern, part of Africa became a factor that accelerated slavery in the region. The sultanate that was based in Zanzibar abetted the trade and these made most of the population from the region to be taken to the Middle East as slaves. The Portuguese and the Europeans who also had interest in the same region did not welcome the establishment of the rule along the East African coast led by the Arabs. Because of the trade related issues, there arose a commercial conflict between the two dominant groups, the Portuguese and the Arabs; this led to a series of wars that emerged between the rivaling groups owing to the control of slave trade along the East coast. It is estimated that by the time the slave trade was abolished, approximately 18 million Africans were transferred to the Middle East where they were placed under bondage (Marmon 124). Some of the prominent people that stood out due to slave trade from the Middle East were Tippu Tip. He was one of the most known slave dealer who transferred million of slaves a cross the Red sea, the Sahara desert, and the Indian Ocean (Pipes). History also reports that the Arabs also enslaved some of the Europeans and about 1 million in relation to this were captured and placed under bondage in the Arab world. With the

Ethics and professional development Essay Example | Topics and Well Written Essays - 500 words

Ethics and professional development - Essay Example It implies that if the devices fail to provide safety, the public will retaliate with wrath for the disappointment. This is because public always supposes that the fire protection and detection professionals must install systems that function perfectly (Gagnon, 2008). In the aspect of the values of a client, the protection and detection professionals encounter ethical situations where they are expected to install a system that surpasses the minimum standards of care. Thus, in case of a default to meet that requirement, the company (client) might be deemed as ineffective by its customers. The fire protection field has its values that should also abide by specific standards. These professionals must have a certificate from the National Institute for Certification in Engineering Technologies (NICET) board. This restricts the technicians and technologists under the board to work in the confines of the law of protection and safety (Gagnon, 2008). In the case of catastrophic events, the professionals always suffer professional ignominy. This is because their clients and the public expect the detection and protection systems to be perfectly effective. In the case of a catastrophe, their professional skills end up being questioned. It is always occasioned by the high expectations of people that the installation of the systems is placed with excellence (Gagnon, 2008). After a significant fire death or loss, the fire protection laws, codes and standards are modified to cover the company in loss. This is because the fire professionals are viewed as too professional to install a system with dysfunctions (Gagnon, 2008). The whistle-blowing actions entail alarming people about a situation that is deemed unethical in the fire protection and detection system. However, this process can infringe an employer-employee relationship especially when an employee reports a