Free Koreatown in LA History Essay Example

Free Koreatown in LA History Essay Example and ethnic connotation.

How to Disinfect Rainwater for Drinking

How to Disinfect Rainwater for Drinking You can usually drink rain straight from the sky, but if youre collecting and storing it, youll want to disinfect rainwater for drinking and cleaning. Fortunately, there are simple disinfection methods to use, whether you have power or not. This is handy information to know in case youre stuck after a storm without water or youre out camping. The same techniques can be used to prepare snow for drinking, too. Quick Methods to Disinfect Water Boiling - Reduce pathogens by boiling water for 1 minute at a rolling boil or 3 minutes if youre at an altitude greater than 2,000 meters (6,562 feet). The longer boiling time at high altitude is because water boils at a lower temperature. The recommended duration comes from the Centers for Disease Control (CDC). If you store freshly boiled water in sterile containers (which can be boiled) and seal them, the water will remain safe indefinitely. Bleach - For disinfection, add 2.3 fluid ounces of household bleach (sodium hypochlorite in water)  per 1,000 gallons of water (in other words, for a small volume of water, a splash of bleach is  more than sufficient). Allow 30 minutes for the chemicals to react.  It may seem obvious, but use unscented bleach since the scented sort includes perfumes and other undesirable chemicals.  Bleach dosage is not a hard-and-fast rule because its effectiveness depends on the temperature of the water and pH. Also, be aware that bleach may react with chemicals in the water to produce toxic gases (mostly a concern with turbid or cloudy water). Its not ideal to add bleach to water and immediately seal it in containers - its better to wait for any fumes to dissipate. Although drinking straight bleach is dangerous, the small concentration used to disinfect water isnt likely to cause problems.  Bleach dissipates within 24 hours.   Why Would You Disinfect Rainwater? The point of disinfection is to remove disease-causing microbes, which include bacteria, algae, and fungi. Rain generally doesnt contain any more microbes than any other drinking water (its often cleaner than groundwater or surface water), so its usually fine to drink or use for other purposes. If the water falls into a clean cistern or bucket, its still fine. In fact, most people who collect rainwater use it without applying any treatment. Microbial contamination of rain is less of a threat than toxins that might be in the water from surfaces it touched. However, those toxins require filtration or special treatment. What were talking about here is pure rain. Technically, you dont have to disinfect it, but most public agencies recommend taking the extra precaution to prevent illness. Ways to Disinfect Water There are four broad categories of disinfection methods: heat, filtration, irradiation, and chemical methods. Boiling water is an excellent method, but obviously, it only helps if you have a heat source. Boiling water can kill some pathogens, but it does not remove heavy metals, nitrate, pesticides, or other chemical contamination.Chlorine, iodine, and ozone are most often used for chemical disinfection. Chlorination can leave potentially toxic by-products, plus it doesnt kill all cysts or viruses. Iodination is effective, but leaves an unpleasant taste. Use of iodine is not recommended when preparing water for pregnant women or people with thyroid problems.  Adding ozone is effective, but not widely available.Irradiation is accomplished using an ultraviolet light or exposure to strong sunlight. UV light kills bacteria and viruses, but doesnt kill all the algae or cysts of pathogenic organisms. Sunlight is effective if the water is sufficiently clear, the light is bright enough, and the water is exposed to light long enough. There are too many variables to give firm recommendations on use of this method. Microfiltration effectiveness depends on the pore size of the filter. The smaller the pore size, the better the filtration, but its also slower. This technique removes all pathogens. Other techniques are becoming more widespread, including electrolysis, nano-alumina filtration, and LED irradiation.

Trade at global level Dissertation Example | Topics and Well Written Essays - 1000 words

Trade at global level - Dissertation Example Methodology is considered as the systematic use of the statistical methods to explore different research questions. A consistent and effective use of statistical methods therefore also offers researchers an insight into what is achievable and what is not. Considering the overall nature of this research study, researcher is anticipating conducting a qualitative research study. Qualitative research methods such as interviews and review of the existing literature will be performed in order to gather the data. Based on the overall nature of the study, researcher aims to take out 3 to 5 international firms in UK which are engaged into the global trade business. A questionnaire will be developed to ask semi-structured questions from the managers of these firms to understand and explore as to what methods they adapt in order to successfully trade at the global level and how these decisions are made.Principal IssueThe overall principal issue is to explore and understand through a combination of qualitative and quantitative research as to what are some of the ways which international firms adapt in order to engage into the global trade. Besides, this research study will also explore as to how these decisions are made i.e. what factors are taken into consideration in order to make the decision on entry mode for doing business at international level.At this stage, researcher is not anticipating to use any external resources however internal resources such as use of online databases as well as university library.... The aim of the Research Since global trade has became so large that its impact can be easily felt on the economy and society of any given country. Considering such an overall importance of the global trade, this research study will therefore aim to explore and understand the different dynamics of working in a global market. The focus will therefore be on understand both the macro level as well as micro level factors which are taken into consideration before firms actually make decisions to engage into global trade. The overall aim of the research is to explore and understand as to how the international firms operate into global market and some of the ways as to how global trade takes place. This research study will therefore aim to explore as to what different strategic options are exercised by UK firms to enter into global trade and how such options are exercised. Research Questions This research study aim to explore following research questions 1. What methods UK firms adapt to con duct trade at global level? This research question will focus on exploring as to what are some of the common and preferred modes of entry by the UK firms. 2. How such decisions are made? What are some of the criteria firms use in order to decide as to which mode of entry would be effective? This research question will focus on exploring as to which factors are considered as most important while making decisions to engage into the trade at the international level. Method and Sampling Methodology is considered as the systematic use of the statistical methods to explore different research questions. A consistent and effective use of statistical methods therefore also offers researchers an insight into what is achievable and what is not. Considering

Education is Important Because It Develops the Individual Essay

Education is Important Because It Develops the Individual - Essay Example The syllabus itself where learning to read, write, count, draw, take physical exercise, hear music, play games etc., serves to develop the mental and physical abilities. Once basic literacy and numeracy are achieved, many doors are opened for independent thought and action. The imagination expands, the world of books is available and with it, all areas of knowledge. Communication skills also grow, and with these comes the ability to relate to others and the world at large. Of great importance too, are the relationships formed with others in and outside of school. The other children, teacher, janitor, head teacher, classroom aide and so on, a great number of individuals outside of the family are now a part of the child's experience and serve to widen it.Such a world reflects society at large and the learning within is applied outside. The need to be polite to others, to respect those who help, serve or share knowledge, to learn to share, to participate and contribute, all these are vital elements within a good educational structure. Social skills developing thus are taking the child towards becoming an adult who can learn and who can contribute positively to society. Already we can see the value of education, both to the individual and the world. 'Social, emotional and beh... Recent research on social, emotional and behavioral skills suggests that by encouraging the attainment of these, 'Social, emotional and behavioral skills underlie almost every aspect of school, home and community life, including effective learning and getting on with other people' (Developing Children's Social, Emotional and Behavioral Skills: Guidance) The suggestion is that integrating such skills contributes to the individual's 'whole person' development, and their attainment is part of true education, which enables the person to reach their full potential. For example, the skills involved in self-motivation include the practice of sustained effort and learning, belief that a goal is attainable, the ability to deal with setbacks and to be proud of achievement. By using self-awareness too, a child or adult in fact, recognizes how thoughts, feelings and behaviors all interact and affect each other and devises ways to deal with this. Consider a child who discovers a talent or love for music, dance, art or books, or whatever. The good feelings this discovery bring about, encourage them to work at that talent and achieve goals, their potential in this area. Being 'good' at something then spills over into other aspects of life and learning, the confidence gained helps them towards a positivity which can only benefit 3. society. The ethic of working towards a goal, understanding how to deal with what goes wrong and still trying, makes for a rounded, fulfilled adult. Thus a structured education, in which formal knowledge-based education is underpinned by what is often described as 'emotional intelligence' is of vital importance to the individual and the wider society in

Length for Nickel-chrome wire of a diameter Essay Example for Free

Length for Nickel-chrome wire of a diameter Essay This is because the resistance is very high so current will be low. The wire will heat up because the resistance is high leaving me with a good range of resistances between 100-10cm. I shall now work out the current that would flow through 1m of wire: I=V/R 3/3. 6= 0. 833 A 3/5. 3= 0. 566 A 3/15. 2= 0. 197A 3/21. 3= 0. 141A 3/35. 1= 85mA   This is my desired Current. By using these results I now know what range of the ammeter needs to be. It shall be that of 0-100mA. My school has ammeters that can measure to this range. Results Length (cm) Voltage 1 (V) Current 1 (mA) Voltage2 (V) Current 2(mA)   Measurements of diameter of wire at 20 cm intervals Point measured at (cm) Diameter measured (mm)Final data (allowing for end error) I then checked the end error of the micrometer was +0. 04mm leaving me with the final data Percentage Errors of Apparatus Micrometer. When the diameter is put into the equation A=? (d/2)2 the diameter is squared so the error is doubled i. e. 10. 5% Conclusion Alessadnro Bizzarri I found out that my predictions were correct. The longer the piece of wire, the greater the resistance. This is due to the idea of the free moving electrons being resisted by atoms in the wire. There would be more collisions in a longer piece of wire, which explains the increased resistance. I also predicted that the relationship between the wire length and the resistance should be directly proportional because the line pass through the origin. I finished with a straight line graph so this prediction was also correct. This is because in a wire twice the length of another wire, there would be double the number of atoms causing resistance. From my graph my gradient is equal to 41/1. 04= 39. 42? m. Gradient= 39. 42? m. By using the formula P= Gradient ? A , I can find P. A=? (d/2) 2 = (0. 19? 10-3/2) 2 Area =2. 8? 10-8 P=2. 8? 10-8 ? 39. 42 P=110? 10-8? m Evaluation I am relatively pleased with the results obtained. I ended up with a wide range of results and my predictions were proved correct. I predicted that when I plotted R against l it would produce a straight line going through the origin. My results were accurate because on my graph nearly all of the points came into contact with the line of best fit or were very close. My techniques of measuring current and voltage were also good because the variation between repeat readings of voltage and current at each length is small. Length (cm) Difference in voltage (V) Difference in Current (mA). The range of resistances between each reading is large which gives me more spread, which makes my graph more accurate. Evaluation of results The value I have calculated for resistivity is 110? 10-8 ? /m. I looked up my data laboratory book and found it to be 110? 10-8. My unrounded value for the resistivity is 110. 3? 10-8 ? /m . This is an almost identical value to that found in the book. Sources of error In this experiment I encountered many sources of error. The inconstant thickness of wire accounts for one of them. Although I took diameter readings along the length of wire, there could still be chinks in the wire which could affect many of my results. The crocodile clips which I used also increased error slightly. The crocodile clip was in contact with an unnecessarily large section of the wire during the experiment. Because of this, I was taking voltage and current readings for a slightly inaccurate length. This is also partly due to human error because I could have placed the crocodile clip onto the exact length I wanted. My micrometer also proved to have significant source of error. The end error of the micrometer I used was +0. 04mm. The micrometer was also found to have the greatest percentage error. Its percentage error was doubled because the diameter it was used to measure was squared . (A=? (d/2)2). Measuring the length of my wire proved quite difficult because it was hard to get an accurate reading by eye. Even though the wire was cello taped to a meter rule there was some slackness in the wire proving that there was in fact more than a meter there. I managed to avoid getting the temperature too hot and so increased accuracy and reliability. Improvements. Many of improvements could be put in place if I was to redo this experiment. I would buy a wire, which has the same diameter all the way through. I could also find an improvement to the crocodile clips. Instead of the clips I could use a jockey key. The length of wire which I would be collecting data for would be a lot accurate as jockey key comes into contact with the wire over a small distance compared to the crocodile clips. Further work A possible source for further work is analysing the effect of the cross sectional area of the wire with resistance. Using the equation R=pl/A in the form of Y=mx+c. Plotting R against l/A again I could predict another straight line and the resitivity would be found. This would be the same for nickel Chrome. I could also see if the equations R? l and R? l/A are true for other types of wire. Bibliography Physics by Tom Duncan   Salters Horners advanced Physics Collins advanced modular sciences Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

Latitudinal Gradient of Species Diversity Essay -- Geography Geology N

Latitudinal Gradient of Species Diversity The latitudinal gradient in species diversity is one of the most striking patterns in the distribution of organisms on the planet. Simply put, the average number of species per unit area increases dramatically the closer the area is to the equator, almost entirely regardless of the type of organism being considered (Pianka, 1994). Researchers investigating the gradient have formulated a wide variety of hypothesis explaining the higher level of species diversity in the tropics. These include but are not limited to: a greater degree of evolution and radiation in tropical species due to the long and relatively stable geological history of the area, seasonal climatic stability and/or predictability, a higher level of productivity, an increased rate of competition and a higher predation intensity (Pianka, 1994). Another theory is that tropical soils somehow influence species diversity and thus cause the latitudinal gradient. This paper will further investigate this final theory by outlini ng the basic characteristics of tropical soils, summarizing the mechanisms invoked to explain species diversity with these soil characteristics, and evaluating how well this research agrees with what is known about tropical soils. For the sake of narrowing the topic somewhat, attention is limited to the soils of and research occurring in Latin America. Tropical Soils In the past, tropical soils have been over-simplified and misunderstood (Sanchez, 1976), and this situation plagued soil science at least until the late seventies (Van Wambeke and Dudal, 1978). Sanchez (1976) attributes this misunderstanding of tropical soils to the fact that when temperate region-trained soil scientists first went to the... ...s richness in Costa Rican forests: Journal of Biogeography, 7, 147-157. Jordan, C.F. and Herrera, R., 1981, Tropical rain forests: are nutrients really critical?: American Naturalist, 117, 167-180. Paoletti, M.G., Taylor, R.A.J., Stinner, B.R., Stinner, D.H., and Benzing, D.H., Diversity of soil fauna in the canopy and forest floor of a Venequelan cloud forest: Journal of Tropical Ecology, 7, 373-383. Pianka, E.R., 1994. Evolutionary Ecology, Fifth Edition: New York, Harper Collins College Publishers, p. 390-396. Sanchez, P., 1976, Properties and Management of Soils in the Tropics: New York, John Wiley and Sons, Chapters 2,3,4, and 5. Van Wambeke, A., and Dudal, R., 1978, Macrovariability of soils of the tropics, p. 13-28 in Stelly, M. (editor-in-chief), Diversity of Soils in the Tropics: Ithaca, Department of Agronomy, Cornell University Press.

Barrier is something Essay

Unit 18 What is barrier? A barrier is something that gets into the way or stops another thing from happening. As we all know, communication is an extreme complex progress. And if one person finds it hard to understand subject or to write or even speak effectively about it, that person cannot be sure that his/her meaning has been received exactly. This loss of meaning which may block communication is often called Barrier. There are 3 main ways in which communication can be blocked: 1. If a person cannot see, hear, or receive the message 2. If a person cannot make sense of the message 3. If a person misunderstands the messages 1. Person cannot see, hear, or receive the message. Visual disability Hearing disability Environmental problems –(noise) Speaking from too far 2. Person cannot make sense of the message. Different language are being used, including sign language People using different terms, such as slang internet or text jargon One of the speakers has physical or intellect disability, such as memory loss or learning Dysfunction. 3. Person misunderstands the message. Cultural difference: different cultures interpret non-verbal and verbal and humour, in different ways Assumptions about people: assumptions about race, gender, disabilities etc. can lead to stereotyping and misunderstanding Emotional Difference, very angry or very happy people may misinterpret what is said think about sarcasm Social contest: conversation and non-verbal messages understood by close friend may not be understand by strangers. Physical barriers A physical barrier to communication Is something in the surrounding that stops the person from communicating with other. For example if the place where the conversation is held may be noisy. Impairmentsvc Some people will haveimpairments that can stop them from communication for example if they are unable to see,hear,or talk. Emotional factors Emotional factor can affect the way we communicate with others for example, lack of support /lack of trust, afraid,feeling happy,feeling sad,low self-estee/ or over/under confident. Different language Some people may not speak the same language as you and therefore you may have difficulty understanding each other Jargon Jargon is when people use technical words. The use of jargon can be confusing for other to understand.