Principle of Account Essay Example for Free

Principle of Account Essay A microscope is an instrument used to see objects that are too small for the naked eye. The science of investigating small objects using such an instrument is called microscopy. Microscopic means invisible to the eye unless aided by a microscope. There are many types of microscopes, the most common and first to be invented is theoptical microscope which uses light to image the sample. Other major types of microscopes are the electron microscope (both the transmission electron microscope and the scanning electron microscope) and the various types of scanning probe microscope. Microscope 1. An optical instrument, consisting of a lens, or combination of lenses, for making an enlarged image of an object which is too minute to be viewed by the naked eye. Parts and Specifications Historians credit the invention of the compound microscope to the Dutch spectacle maker, Zacharias Janssen, around the year 1590. The compound microscope uses lenses and light to enlarge the image and is also called an optical or light microscope (vs. an electron microscope). The simplest optical microscope is the magnifying glass and is good to about ten times (10X) magnification. The compound microscope has two systems of lenses for greater magnification, 1) the ocular, or eyepiece lens that one looks into and 2) the objective lens, or the lens closest to the object. Before purchasing or using a microscope, it is important to know the functions of each part. Eyepiece Lens: the lens at the top that you look through. They are usually 10X or 15X power. Tube: Connects the eyepiece to the objective lenses Arm: Supports the tube and connects it to the base Base: The bottom of the microscope, used for support Illuminator: A steady light source (110 volts) used in place of a mirror. If your microscope has a mirror, it is used to reflect light from an external light source up through the bottom of the stage. Stage: The flat platform where you place your slides. Stage clips hold the slides in place. If your microscope has a mechanical stage, you will be able to move the slide around by turning two knobs. One moves it left and right, the other moves it up and down. Revolving Nosepiece or Turret: This is the part that holds two or more objective lenses and can be rotated to easily change power. Objective Lenses: Usually you will find 3 or 4 objective lenses on a microscope. They almost always consist of 4X, 10X, 40X and 100X powers. When coupled with a 10X (most common) eyepiece lens, we get total magnifications of 40X (4X times 10X), 100X , 400X and 1000X. To have good resolution at 1000X, you will need a relatively sophisticated microscope with an Abbe condenser. The shortest lens is the lowest power, the longest one is the lens with the greatest power. Lenses are color coded and if built to DIN standards are interchangeable between microscopes. The high power objective lenses are retractable (i. . 40XR). This means that if they hit a slide, the end of the lens will push in (spring loaded) thereby protecting the lens and the slide. All quality microscopes have achromatic, parcentered, parfocal lenses. Rack Stop: This is an adjustment that determines how close the objective lens can get to the slide. It is set at the factory and keeps students from cranking the high power objective lens down into the slide and breaking things. You would only need to adjust this if you were using very thin slides and you werent able to focus on the specimen at high power. Tip: If you are using thin slides and cant focus, rather than adjust the rack stop, place a clear glass slide under the original slide to raise it a bit higher) Condenser Lens: The purpose of the condenser lens is to focus the light onto the specimen. Condenser lenses are most useful at the highest powers (400X and above). Microscopes with in stage condenser lenses render a sharper image than those with no lens (at 400X). If your microscope has a maximum power of 400X, you will get the maximum benefit by using a condenser lenses rated at 0. 5 NA or greater. 0. 65 NA condenser lenses may be mounted in the stage and work quite well. A big advantage to a stage mounted lens is that there is one less focusing item to deal with. If you go to 1000X then you should have a focusable condenser lens with an N. A. of 1. 25 or greater. Most 1000X microscopes use 1. 25 Abbe condenser lens systems. The Abbe condenser lens can be moved up and down. It is set very close to the slide at 1000X and moved further away at the lower powers. Diaphragm or Iris: Many microscopes have a rotating disk under the stage. This diaphragm has different sized holes and is used to vary the intensity and size of the cone of light that is projected upward into the slide. There is no set rule regarding which setting to use for a particular power. Rather, the setting is a function of the transparency of the specimen, the degree of contrast you desire and the particular objective lens in use. How to Focus Your Microscope: The proper way to focus a microscope is to start with the lowest power objective lens first and while looking from the side, crank the lens down as close to the specimen as possible without touching it. Now, look through the eyepiece lens and focus upward only until the image is sharp. If you cant get it in focus, repeat the process again. Once the image is sharp with the low power lens, you should be able to simply click in the next power lens and do minor adjustments with the focus knob. If your microscope has a fine focus adjustment, turning it a bit should be all thats necessary. Continue with subsequent objective lenses and fine focus each time. What to look for when purchasing a microscope. If you want a real microscope that provides sharp crisp images then stay away from the toy stores and the plastic instruments that claim to go up to 600X or more. There are many high quality student grade microscopes on the market today. They have a metal body and all glass lenses. One of the most important considerations is to purchase your instrument from a reputable source. Although a dealer may give you a great price, they may not be around next year to help you with a problem. One dealer that we can highly recommend is Microscope World. They offer a wide variety of instruments at very competitive prices.

Rhythmic Procedures and Rudimental Drumming :: essays papers

Rhythmic Procedures and Rudimental Drumming In history, drumming and the use of percussive instruments have had a significant role in people’s lives. Not only do the people who play these instruments enjoy them, but it is said that "there is as much pleasure participating in, as listening to and admiring an expert drummer’s improvisations". The use of drums has been recognized as being able to put people into spiritual trances throughout history. The drum is a musical instrument with great power and presence that gives the "pulse" or backbone to the music it is incorporated with. There are three rudimental rhythmic procedures that have been known in drumming for the use of communication, entertainment and both communication and entertainment together. These are; (1) the use of a drum as a speech surrogate or a "talking drum". These methods of playing were used for communicative purposes and often codes were used to be played over long distances for the sending and receiving of messages. (2) The use of both iconic and symbolic dimensions of communication within music and dance. Throughout many festivals in Africa, depending on the event being celebrated, drumbeats are used to dictate the type of dance to be done by the listeners. For example, at the time of a birth of twins there is a different dance done than at a birth of a single child and the beat of the drum instructs the listeners to do the appropriate dance. (3) This rhythmic procedure is most commonly used today and is the pure musical play of rhythms in dance. There are no communicative obligations within this type of music, which allows for free-form dance and unlimited use of improvisational strategies by the musician. The third rhythmic procedure will be most emphasized throughout this report for a few reasons. One reason is that it is not possible to make generalizations about drumming as a whole, used as communication devices because every society in early Africa had it’s unique fingerprints on sounds of the rhythmic beats they have played. Another reason for the emphasis on this rhythmic procedure and not the first two is the accessibility of rhythmical facts pertaining to each. Unfortunately, much of the known facts about rudimental African rhythmic procedures is stored within the minds of the tribal musicians themselves. One phrase I learned from researching this topic is that "the life and energy of the drummer lives half within the drummer’s soul, and half within the drum he plays".

Kate Keller’s Character Analysis Essay

Kate Keller plays the role of an obsessive mother and a typical wife in the play â€Å"All My Sons† It his her motherliness that defines her character the most, as the fist few stage directions refer to â€Å"mother† as, ‘Mother [†¦] is in her early fifties, a woman of uncontrolled inspirations, and an overwhelming capacity for love.’ This â€Å"overwhelming capacity of love† is mostly seen for her son Larry who seems to be dead, but Kate is just not ready to accept reality and move on. Even before mother’s entry in the play, the readers find out a few details about her through the stage directions and even the dialogues of the other characters, such as the dialogue between Chris and Joe where Chris threatens to abandon home and their business if Joe somehow does not convince Kate for Chris’s wedding with Ann. Kate’s obsession with her son Larry, who never returned from war goes to such an extent that she has dreams about him, leading her to cry every night. She is just not ready to accept her son’s death and for the first time her â€Å"controlling† nature is seen as she tries to manipulatively tries to create distance between her older son Chris and â€Å"Larry’s girl†, Ann; â€Å"I think her nose got longer† Her obsession goes as far as even symbolizing the apple tree’s fall as something dangerous, and something harmful coming towards Larry. The fall of the apple tree probably foreshadows the death of Larry, instigating his family to move on. Another main characteristic that Kate posses is manipulativeness. She avoids every discussion that she realizes, goes towards the future of Chris and Ann. She either deviates the topic or just acts as though she has a headache. She manipulates her discussion with Chris in such a way where Chris finds it impossible to even mention their future together. Kate first talks about how proud she is that Ann has not move on and that she is still waiting for Larry to return, and then suddenly asks him if he is interested in Ann, and ofcourse by then Chris is in no state to hurt his mother further by admitting his love for Ann. Apart from Larry, Kate is also the one holding the family together. She is the central character of the play who knows the ‘big’ secret, and is making sure that her husband is safe from any confrontations and any sort of trouble. Another reason for holding onto Larry and believing that he is still alive is the fact that if Larry was actually dead, it would be nobody’s fault but Joe’s. She knows the crime that Joe had indulged in and she could not accept the fact that her son may have been killed by his own father, and her own loving husband. She is also the one who again manipulated facts and saved Joe from going to prison; instead framing Ann’s father and sending him to prison. This secret is another thing that bothers her immensely. However the example of keeping the secret and saving her husband from going to prison shows her smartness and her desire for keeping the family together, as one. But at the same time it also gives the readers a further insight into her character, as the keeping of this secret also hints towards her weaknesses; her family. Her weakness takes her to the extent of dishonesty and guilt. As mentioned above, she depicts the character of a â€Å"typical† good wife, by saving her husband and trying to keep her family one through love. Throughout the play as readers, we realize that there are dark secrets to be revealed and Kate is somehow a central part of it. She plays a significant role in saving her family, but at the same time she is also seen as one of the weaker characters from outside; considering her nightmares and her troubles dealing with the loss of Larry. Therefore it can be argues whether she forms the strongest character in the play, or the weakest.

Globalization and Human Welfare - 1656 Words

International free trade has become the foundation of neoliberal globalization. The main organizations for carrying out free trade are World Trade Organization (WTO) established on 1995, International Monetary Fund (IMF) and World Bank (WB). The main aim was to promote development and trade. Trade has become the lens through which development is perceived, rather than the other way round . The concept of trade evolved right from Adam Smith and David Ricardo who introduced the concept of comparative advantage which compares the productiveness across countries. Here countries make use of their natural resources, climate, skills etc. According to Paul Krugman trade reflects arbitrary or temporary advantages resulting from economies of scale†¦show more content†¦World trade has grown five times in real terms since 1980, and its share of world GDP has risen from 36 percent to 55 percent over this period. †¢ During the 1990s more Asian countries were integrated into the trading system. The developing countries have been catching up with or surpassing high-income countries in their trade openness, reflecting the widespread convergence of low- and middle-income countries’ trade systems toward the traditionally more open trading regimes in place in advanced economies . Globalization measures distinguish between trade and financial openness and include both â€Å"de facto† and â€Å"de jure† measures. Specifically, trade openness is measured by the (unweighted) average tariff rate (â€Å"de jure† measure), and the ratios of both non-oil exports and non-oil imports to GDP (â€Å"de facto† measures). Financial openness is measured by the Chinn-Ito index of capital account openness (â€Å"de jure† measure), the ratios of various types of financial liabilities (foreign direct investment, portfolio equity, and debt) to GDP and the stock of foreign direct investment assets expressed as a percentage of GDP (â€Å"de facto† measures). The latter, which is closely associated to offshore, outsourcing, may be particularly relevant to measure the impact of globalization on inequality in advanced countries, while its value is minimalShow MoreRelatedGlobalization and the Decline of the Welfare State1172 Words   |  5 P ages The idea that globalization and the welfare states can conflict comes from the fact that: while globalization is based on profit maximization, the welfare states main goal is to reduce, if not eliminate inequality, insecurity and poverty through proper redistribution of wealth mechanisms. The welfare state has to enhance â€Å"people’s adaptability, so that they, whatever their skills, can turn themselves from losers into winners through their own efforts† (Dennis J. Snower. Et al.137). The pointRead MoreThe Social Work Policies1506 Words   |  6 Pages Social Work Policies Social Welfare Q 1 Income support policies in the United States Income support policies in the United States view the monetary aspect of individual and family well-being. Income support policies are categorized into two that is direct cash transfers and indirect cash transfers. Income support programs are aimed at reducing poverty levels and boosting the economic growth of United States. Major historical developments took place in the late 1950s. In 1958, social securityRead MoreThe Welfare State and Government Responses to Economic Openness1668 Words   |  7 PagesThe Welfare State and Government Responses to Economic Openness I. Introduction Economic openness is the phenomenon in which individual economies from all over the world become increasingly connected and interdependent through greater liberalization of trade and the vast movement of goods, services, and capital across borders. With the rise of globalization, positive effects have resulted from economic openness. The widespread benefits of globalization have resulted in global economic growthRead MoreGlobalization and the Nation State Essay1633 Words   |  7 PagesGlobalization Ââ€" Struggles of the Nation-State and Issues of Equality Economic growth in globalization is often due to rapid technological advancements and changes in the gathering of information and communications. Globalization has always existed but todays globalization has been a much more rapid and intense process than in the past. The question here is whether todays globalization weakens the nation state and whether or not it undermines national control over the economy. We are trying toRead MoreHuman Trafficking: Searching for a Solution1437 Words   |  6 PagesThailand is very well known for its high proportion of human trafficking. The men and woman are constantly sold for their resources. Labor and prostitution are the most common cases. In Thailand there has been an uprising of human trafficking on the fishing boats or trawlers. On the trawlers many men are forced to work without pay under the impression that they owe money. The men come from neighboring countries of Cambodia and Burma. Among many boats, abuse is a normal practice to keep the men detainedRead MoreGlobalization as a Process1744 Words   |  7 Pagesinto contact with globalization. We are all active members of this web, and we are the fuel it needs to work to perfection. This web needs employers and employees, it needs people in need and people willing to help, and it needs members of different cultures and societies. It needs you. Whether it was by flying on an airplane, traveling to a foreign country, or simply by buying medicine, you are contributing to the unstoppable giant known as globalization. To understand globalization it is necessaryRead MoreGlobalization: The Big Friendly Giant Essay1458 Words   |  6 Pagesinto contact with globalization. We are all active members of this web, and we are the fuel it needs to work to perfection. This web needs employers and employees, it needs people in need and people willing to help, and it needs members of different cultures and societies. It needs you. Whether it was by flying on an airplane, traveling to a foreign country, or simply by buying medicine, you are contributing to the unstoppable giant known as globalization. To understand globalization it is necessaryRead MoreGlobalization Essay889 Words   |  4 PagesGlobalization can be defined as â€Å"the development of an increasingly integrated global economy marked especially by free trade, free flow of capital, and the tapping of cheaper foreign labor markets† (Webster Dictionary). It brings countries closer together and impacts things such as human rights, politics, and economics. While Globalization can have positive factors it has its downfalls. Globalization has effects on human well-being in societies around the globe. This process seems to only beRead MoreThe Universal Declaration Of Human Rights1489 Words   |  6 PagesAll around the world, basic human rights, as outlined in the Universal Declaration of Human Rights, are being violated. As Thomas Pogge argues, these violations contribute to the rise of poverty in multiple nations. The global rate of death caused by poverty is astounding, â€Å"†¦360 million human beings have died prematurely from poverty related causes, with some 18 million more added each year†, and unfortunately these figures are substantially larger than the death count of many wars (Pogge, p.50)Read MoreImpact of Globalization on Indian Economy1572 Words   |  7 PagesGlobalization is the new notion that has come to rule the world since the nineties of the last century with the end of the cold war. The frontlines of the state with increased reliance on the market economy and renewed belief in the private capital and assets, a process of structural alteration encouraged by the studies and influences of the World Bank and other International organisations have started in many of countries. Also Globalisation has brought in new avenues to developing countries. Greater