Research Paper on Quantum Physics Essay Example

Research Paper on Quantum Physics Essay Quantum physics is a general name for a set of the natural theories originated in twentieth century, which, like the theory of relativity, mark a rupture between what is now called classical physics – all theories and physical principles accepted in the nineteenth century. The so-called â€Å"quantum† theories describe the behavior of atoms and particles – what classical physics, including Newtonian mechanics and electromagnetic theory of Maxwell, could not do – and elucidate some properties of electromagnetic radiation. Its description of microcosm, radically new, is based on new assumptions. In 1900, the researches of German physicist Max Plank showed that the radiation energy is discrete and is emitted by specific portions – quantum, whose energy depends on the frequency of the light wave. The theory of Max Planck did not need the concept of ether and overcome the contradictions and difficulties of electrodynamics by James Maxwell. Max Planck experiments led to the recognition of the dual nature of light, which has both corpuscular and wave properties. It became clear that such a conclusion was not compatible with the concepts of classical physics. Thus, Max Planck theory introduced a new quantum physics, which describes the processes in microcosm. We will write a custom essay sample on Research Paper on Quantum Physics specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Research Paper on Quantum Physics specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Research Paper on Quantum Physics specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Basing on the ideas of Max Planck, Albert Einstein suggested the quantum theory of light, according to which light is a moving stream of photons. The quantum theory of light (photon theory) considers light as a wave with a discontinuous structure. Light is the flow of indivisible quanta of light – photons. It became clear that the electron is knocked out by a photon only if the photon energy is sufficient to overcome the force of interaction of the electrons with the atomic nucleus. In 1922, for the creation of the quantum theory of light, Einstein was awarded the Nobel Prize in physics. The explanation of the photoelectric effect of the process was based, in addition to the quantum hypothesis of Max Planck, on the new ideas about the atom structure. In 1911, English physicist Rutherford proposed the planetary model of the atom. The model represents an atom as a positively charged nucleus surrounded by negatively charged electrons. This model allowed to explain the phenomenon of rejection of alpha particles passing through the atom. As the size of an atom is larger than that of electron and nucleus, the alpha particle passes unimpeded through it. The deviation is observed only when the alpha particle passes close to the nucleus, in this case, the electric repulsion causes a sharp deviation from its original path. All this and even more should be presented in your research proposals on quantum physics. So you can freely use some free sample research papers on the subject, to find additional information for your research project. Are you looking for a top-notch custom written research paper on Quantum Physics topics? Is confidentiality as important to you as the high quality of the product? Try our writing service at EssayLib.com! We can offer you professional assistance at affordable rates. Our experienced PhD and Master’s writers are ready to take into account your smallest demands. We guarantee you 100% authenticity of your paper and assure you of dead on time delivery. Proceed with the order form: Please, feel free to visit us at EssayLib.com and learn more about our service!

Polution essays

Polution essays Websters Collegiate Dictionary defines pollution as the introduction of harmful substances or products into the environment. There are many types of pollution ranging from air to land. It is a major problem in Florida as well as the entire world. Pollution not only damages the environment, but damages us also. Pollution is the cause of many problems ranging from lung cancer to the greenhouse effect. Though pollution is all among us, we continue to live in our own filth and do nothing to better the environment around us. What is the reason behind this flawed logic? In this paper I will examine the problems and solutions for this issue. Automobiles are definitely the greatest source of pollution. The pollution created by cars is immense. One polluting effect of cars is the heat it creates. This heat makes it unpleasant to be near the car while it is running. The heat produced by cars contributes to the deterioration of the ozone. Another negative effect that automobiles contribute to the environment is the exhaust. The toxic fumes given off as a byproduct of the combustion engine are slowly deteriorating our lungs and our atmosphere. The exhaust is extremely toxic to human beings. But why do we continue to drive these walking time bombs? Some common reasons given are that cars get us places faster and walking or riding a bike would take to much time and energy. Why walk four miles in four hours when you can drive the same miles in four minutes? I agree that we need cars but we should not abuse the right to use them. Do not drive down the road a few blocks to see a friend, walk. One good solution that can help e liminate some of the car pollution is by having more car pools. Studying our owner's manual and using these 10 tips for car care will save the air and help cars pass its Smog Check: Check the tire pressure and alignment. Change the oil and filter. Keep it tuned up. Check the emission control devices. Service the e...

Causes of the Holocaust

With the rise of anti-Semitism, Nazi's propaganda and Hitler's message, the Germans accepted the claim of the unwelcome Jewish of the Nazi regime, so they became audiences of the Holocaust, created the power of the party, moved forward , And excluded. The Jewish German people regard the Jews as scapegoats for economic and political problems. People like Germans think that others should be responsible for themselves. This will help to create anti-Semitism. David Downing believes that Jews are considered the murderers of Christ. The Jewish focus on how the teacher treats the Holocaust is clear. The most common cause of massacres of Jewish day schools is anti-Semitism. Political instability, intolerance, prejudice, hatred of Weimar Republic, Hitler, Nazi Party were second, which were quoted at about the same frequency. The third most frequently cited reason is World War I and the Treaty of Versailles. Regarding covered topics, the focus of the Jewish focus is clear again (from the most frequently quoted to those not quoted quite often): Anti-Jewish Act (86%), Slum Life (86%), Jewish Unmarried Massacre (82%), Warsaw Jewish uprising (82%), Auschwitz (79%), Slum area (79%), Kristallnacht (79%), Final solution and descent concentration camp (75%), boycott and main combustion (75%). From the Jewish point of view, all these themes will be regarded as the core of the Holocaust. Did Jud Suss guide the Holocaust? It is probably not the case, but it may play a larger role than the Holocaust catalyst that was previously accepted as a catalyst. When the Holocaust was divided into three stages of elimination, elimination, and extinction, most people placed Jud Suss in the middle of the exclusion period. This arrangement usually comes from a 90-minute meeting of Nazi senior officials held on January 20, 1942. However, as early as 1939, Poland had already begun mass murder of Jews.

Pepsi Strategies in 2008 Case Study Example | Topics and Well Written Essays - 500 words

Pepsi Strategies in 2008 - Case Study Example There is also emphasis on the use of television advertising that features mainly celebrities. PepsiCo is intending to conduct some major restructuring operation in 2009 by getting its business segments to achieve efficient concentration in the firm's main operations: Pepsi-cola and Frito-Lay. This would support the company in improving its position in the world of consumer packaged products globally and improve its competitiveness in the market of beverages. Pepsi has been in trial to promote it self by attaching its products to some causes of charitable works. In the World water day 2008, for instance, the company was in the front line in trying to help solve the universal crisis of water shortage. This was done mainly to promote the company's products. It achieved more sales through marketing which was intensively ethical and responsible as well as including the products in charitable activities. It has denoted some amount from its sales to support children all over the world to get access to clean and pure drinking water. The firm's slogan states that if the customer decides to take bottled water, then he or she would be making a major difference. The firm intents to move its water brand to out to over 40,000 merchandisers in other parts.

Drug trade between Mexico and the United states Research Paper

Drug trade between Mexico and the United states - Research Paper Example The transshipment of drugs from Mexico across the international border to the United States is not a new phenomenon. Geographically adjacent to the United States it is perfectly positioned as a transshipment point for drugs from other parts of the world. Very little cocaine is grown or processed in Mexico. Rather, it is grown and processed in South American countries such as Peru, Bolivia and Columbia and then shipped to Mexico to be taken across the border into the United States. Much marijuana is grown in Mexico but,again, even more is shipped to Mexico and then across the border to the United States. That said, the behavior of traffickers has changed recently. The shipment of illegal substances to the United States holds the promise of huge profits for those engaged in the trade. The pursuit of these profits has made the cartels – the organizations engaged in smuggling – to become increasingly violent recently, particularly since President Calderà ³n declared war on the drug cartels shortly after coming into office in 2006. The Mexican border states have become much like a war zone with heavily armed military units on the street (since the President deemed local police too corrupt to deal with the cartels) and frequent firefights between the military and the cartels. According to The L.A. Times 28,288 people have died in Mexico since January 2007 as a result of the drug wars. (â€Å"Mexico Under Siege – The Drug War on Our Doorstep†, 2010) Mexico as a whole is not an extremely dangerous place to live or visit. It is less safe than the United States or the United States northern neighbor Canada. However, it is as safe as Jamaica or Israel for visitors and residents. However, this is not the case in the border states. According to The Washington Post, â€Å"The bloodshed is geographically concentrated in key trafficking corridors, notably in the states of Sinaloa, Chihuahua and Tamaulipas.† While Mexico

Bradshaws Theory Essay Example for Free

Bradshaws Theory Essay Bradshaw’s theory about the growth of children is very accurate. When a child experiences pain and suffering at a young age they become emotionally damaged. For example my Grandpa caused my uncle a lot of pain and guilt when he was young because my grandpa divorced by grandma and left my uncle to be the man of the house at such a young age. Today my uncle still has not forgiven my grandfather and he has trouble getting close to other people. In order for my uncle to move forward in his life he has to deal with the issue between himself and my grandfather. Erickson’s theory is if you are treated well and grow up in a warm and caring home you will be better off in life. For example ever since I was very little I have always been able to trust both of my parents especially my mom. I always turn to her for advice and tell her everything. As a result of that I try to be a very trustworthy person because I want other people to feel like they also have someone they can count on. Maslow’s hierarchies of human needs are about the differences between the things we need and the things we desire. For example we need things such as food water and air. We also need security and stability, but we desire self-resect, independence, and self-fulfillment. Although we physically couldn’t survive without the things we need we mentally could not live a happy life without the things we desire.

Seasonal Affective Disorder :: essays research papers

Seasonal Affective Disorder   Ã‚  Ã‚  Ã‚  Ã‚  Seasonal Affective Disorder, or SAD, is a common problem of people living in northern United States. People who are affected by this disorder commonly suffer from depression, lethargy, inability to concentrate, overeating and weight gain. People from the north tend to suffer more from this disorder because of the shortened days. It appears, that due to the deficiency of sunlight some people suffer from these symptoms. The shortened days have a hormonal effect on the body that causes these symptoms, and the use of artificial sunlight is the best way to relieve the disorder.   Ã‚  Ã‚  Ã‚  Ã‚  It was not until recently that SAD was discovered. It was discovered by Peter Mueller, who was reviewing a case of a 29-year-old woman. He had noticed a pattern, the woman’s depression came in the winters and left in the spring. Over the course of years the woman moved from city to city. Mueller noticed, that the farther north she moved the early the depression. Mueller had begun to speculate that the lack of sunlight had contributed to the women’s depression. In order to confirm this he exposed the patient to artificial sunlight. He found that over a period of time the patient had recovered from the depression. Today light therapy is the most commonly used method in treating SAD. The two hormones that are affected by the sunlight, and are thought to be the cause of SAD, are melatonin and serotonin. Both of these chemicals â€Å"are influenced by photoperiodism, the earth’s daily dark-light cycle† (Wurtman 1989). Melatonin is the chemical that effects mood and energy levels. In the human body melatonin is at its highest at night and is lowest in the day. There has been a study done to see if sunlight has a direct effect on suppressing melatonin. It is known that melatonin levels in urine are five times higher at night than they are in the day. It was not until a 1980 study that it was known that melatonin levels could be directly suppressed with light. In an experiment, subjects were woken up at two in the morning and exposed to a half an hour of artificial sunlight. The findings were that melatonin levels were greatly decreased. The decline in melatonin usually happens in the early morning, but in a SAD patient this does not occur until about two hours later. In order to suppress the levels the patient needs to be exposed to sunlight. It is found, that when the patient is exposed to the light there is a significant decrease in depression and the craving for carbohydrates.

Manila Lodge No. 761 vs Ca

MANILA LODGE NO. 761 vs CA ARTICLE 1431 MANILA LODGE NO. 761, BENEVOLENT AND PROTECTIVE ORDER OF THE ELKS, INC. , petitioner, vs. THE HONORABLE COURT OF APPEALS, CITY OF MANILA, and TARLAC DEVELOPMENT CORPORATION, respondents. (G. R. No. L-41001 September 30, 1976) TARLAC DEVELOPMENT CORPORATION, petitioner, vs. HONORABLE COURT OF APPEALS, CITY OF MANILA, LODGE NO. 761, BENEVOLENT AND PROTECTIVE ORDER OF ELKS, INC. , respondents. (No. L-41012 September 30, 1976) |THE CASE two cases are petitions on certiorari to review the decision dated June 30, 1975 of the Court of Appeals that the property subject is a â€Å"public park or| |plaza. | |FACTS | |On June 26, 1905 the Philippine Commission enacted Act No. l360 which authorized the City of Manila to reclaim a portion of Manila Bay. The reclaimed area was | |to form part of the Luneta extension. | |Subsequently, the Philippine Commission passed on May 18, 1907 Act No. 1657, amending Act No. 1360, so as to authorize the City of' Manil a either to lease or to| |sell the portion set aside as a hotel site. |On July 13, 1911 the City of Manila, affirming a prior sale dated January 16, 1909 cancelled 5,543. 07 square meters of the reclaimed area to the Manila Lodge | |No. 761, Benevolent and Protective Order of Elks of the U. S. A. | |Manila Lodge No. 761, BPOE, subsequently sold the said 5,543. 07 square meters to the Elks Club, Inc. The registered owner, â€Å"The Elks Club, Inc. ,† was later | |changed by court oder to â€Å"Manila Lodge No. 761, Benevolent and Protective Order of Elks, Inc. | |In January 1963 the BPOE. petitioned the Court of First Instance for the cancellation of the right of the City of Manila to repurchase the property. GRANTED | |On November 19, 1963 the BPOE sold the land to Tarlac Development Corporation (TDC). | |In June 1964 the City of Manila filed with the Court of First Instance of Manila a petition for the reannotation of its right to repurchase. | |RTC RULING the subject land to be part of the â€Å"public park or plaza† and, therefore, part of the public domain.The court consequently declared that the sale of| |the subject land by the City of Manila to Manila Lodge No. 761, BPOE, was null and void; that plaintiff TDC was a purchaser thereof in g faith and for value | |from BPOE and can enforce its rights against the latter. | |CA RULING AFFIRMED the lower court's decision. | |ISSUE | |WON the subject property was patrimonial property of the City of Manila and not a park or plaza.NO | |WON the City of Manila is estopped from questioning the validity of the sale it execute, conconveying the subject property to the Manila Lodge No. 761, BPOE. NO| |SC RULING We hold that it is of public dominion, intended for public use. When the shore or part of the bay is reclaimed, it does not lose its character of | |being property for public use. | | | |It is not necessary, therefore, that a plaza be already constructed of- laid out as a plaza in order that it be considered property for public use.It is | |sufficient that it be intended to be such In the case at bar, it has been shown that the intention of the lawmaking body in giving to the City of Manila the | |extension to the Luneta was not a grant to it of patrimonial property but a grant for public use as a plaza. | | | |We have demonstrated ad satietatem that the Luneta extension as intended to be property of the City of Manila for public use.The conversion of the said | |property into patrimonial property is within the executive's and possibly the legislation department's authority and the power to make the declaration that | |said property, is no longer required for public use, and until such declaration i made the property must continue to form paint of the public domain. In the | |case at bar, there has been no such explicit or unequivocal declaration. | | | |TDC finally claims that the City of Manila is estopped from questioning the validity of the sale it xecuted on July 13, '1911 conconveying the subject property | |to the Manila Lodge No. 761, BPOE. This contention cannot be seriously defended in the light of the doctrine repeatedly enunciated by this Court that the | |Government is never estopped by mistakes or errors on the pan of its agents, and estoppel does not apply to a municipal corporation to validate a contract that | |is prohibited by law or its against Republic policy, and the sale of July 13, 1911 executed by the City of Manila to Manila Lodge was certainly a contract | |prohibited by law.Moreover, estoppel cannot be urged even if the City of Manila accepted the benefits of such contract of sale and the Manila Lodge No. 761 had| |performed its part of the agreement, for to apply the doctrine of estoppel against the City of Manila in this case would be tantamount to enabling it to do | |indirectly what it could not do directly. | | | |The sale of the subject property executed by the City of Manila to the Manila Lodge No. 61, BPOE, was void and inexistent for lack of subject matter. It | |suffered from an incurable defect that could not be ratified either by lapse of time or by express ratification. The Manila Lodge No. 761 therefore acquired no | |right by virtue of the said sale. Hence to consider now the contract inexistent as it always has seen, cannot be, as claimed by the Manila Lodge No. 761, an | |impairment of the obligations of contracts, for there was it, contemplation of law, no contract at all. | | |The inexistence of said sale can be set up against anyone who asserts a right arising from it, not only against the first vendee, the Manila Lodge No. 761, | |BPOE, but also against all its suceessors, including the TDC which are not protected the doctrine of bona fide ii purchaser without notice, being claimed by the| |TDC does not apply where there is a total absence of title in the vendor, and the good faith of the purchaser TDC cannot create title where none exists. |

Under the Influence Analysis

â€Å"Under the Influence† Rhetorical Analysis In â€Å"Under the Influence†, Scott Russell Sanders recreates his memories and feelings of loss, anger, and fear from his childhood inflicted by his alcoholic father. Sanders shares that growing up with a drunken parent can have a serious long-term effect on a child. He educes awareness and empathy for others by using similes, imaginary, and allusions to recreate battles against his father. Sanders writes to support other victims and to let them know they are not alone.Sanders opens his essay with a very direct fact: â€Å"My father drank†. Although this sentence is simple, his story is not. In the next sentence, he uses a simile to describe his father’s transformation with every alcoholic binge. Sanders wrote that his father â€Å" drank as a gut punched boxer gasps for breath, as a starving dog gobbles food compulsively, secretly, in pain and trembling†. He uses this simile to show that his father wa s not a social drinker, but a man who would drink just to drink.Sanders then uses imaginary to create a typical scene in his house while his father is drunk. He describes his father drinking from bottles of wine, cylinders of whisky, and cans of beer, then his father passes out in his recliner. Later, Sanders’s mother awakens him, which is when the fighting begins. This imaginary creates a sense of sadness and empathy for Sanders, for this was a daily issue for him. Sanders’s purpose for writing â€Å"Under the Influence† was to show that people do not act like themselves when consumed by alcohol.When alcohol takes over a person, they are to be feared. While continuing the story, Sanders begins to use different terms for the word â€Å"drunk†, such as tipsy, pickled, plowed, juiced, and looped. He points out that some of these words are meant to be funny, but the irony is that this is not a funny matter. The irony creates a sense of remorse for the people who suffer the way Sanders suffered growing up. As an adult, Sanders is able to accept the fact that his father suffered from a disease; however, this was not always easy for him to grasp.

Hydroponic Vegetable production Essays

Hydroponic Vegetable production Essays Hydroponic Vegetable production Essay Hydroponic Vegetable production Essay Hydroponico Vegetable OProduction0 BY CYF Hydroponics has often been thought of as the future of growing, what many people do not realize is that the concept has been around for a very long time and already has been applied to agriculture. Hydroponics is not Just for flowers; in fact with its growing popularity in the past decade hydroponics has begun to be used for commercial vegetable production around the world. It is attracting to farmers because it presents them with a way to grow in areas and times they might not have been able to otherwise. This can mean that soil quality is not a factor and that the armers can have more control over their own microclimate within a greenhouse. Hydroponics suggests that anyone anywhere can grow his or her own high quality produce under limited conditions. Hydroponics is a method of growing plants without soil. It is the fastest growing sector of agriculture, and it could very well dominate food production in the future. Hydroponics id defined as the science of growing or the production of plants in nutrient rich solutions or moist inert material instead of soil. Hydroponics comes from Latin, the word hydro meaning water, and ponos meaning labor, hydroponics s water working. It is important to know that water alone is not enough to support plants growth. Traditionally soil gives plants anchorage for their root systems and supports vertical growth, it is a source of nutrients, fresh organic matter, and has water holding capabilities. Hydroponics must use fertilizers in their ionic form and supply plants with their essential minerals and nutrients through a nutrient solution. Artificial anchorage is used such as stakes or trellising. One benefit is that it is a more sterile environment than the soil. Soil can contain many toxins and pollutants as well s undesirable insect life and disease pathogens. With hydroponics it is likely that a recall, like the one we had a few years back on spinach that became contaminated with e-coli, would be entirely avoided. Farmers growing hydroponic crops and researchers see many benefits to this method. Higher yields are common and a higher yield per square foot is a given because plants can be grown densely and in vertical or upright ways. Produce from a hydroponic greenhouse is often of very high quality because it has not been subject to the stresses brought on by outside weather conditions and does not bear scars of amage cause by outside factors. It is easier to protect crops from pests and supplement the sun and increase production. Universities and research facilities for medicine and even NASA study hydroponic methods and use them for control experiments. Facilities can have a fully controlled indoor environment where they can research different affects by introducing variables, or like NASA study possibilities for one day growing plants in outer space or even on the moon. Hydroponics has been around for a long time but has began to take a strong foothold only in this past decade or so. It is a common misconception that NASA invented hydroponics; this is false. The first record of anything resembling hydroponics is by Sir Francis Bacon back in 1627 in his book Sylva sylvarum printed the year after his death in which he introduces a concept he called water culture. Water culture became a popular research technique. In 1699 John Woodward published his water culture experiments on spearmint in which he made the conclusion that plants grew better in unfiltered water. By the 1800s we knew that the reason for this is that there are essential nutrients that plants require for growth and ome are found in minerals present in unfiltered water. 1859-65 German botanists Julius von Sachs and Wilhelm Knop developed techniques of soil-less cultivation using nutrient solutions. The growth of plants without soil became known as solution culture, which is a technique that we still use today. In 1929, at the University of California in Berkeley, professor William Frederick Gericke began to publicly promote what he first termed aquaculture. Gericke created a stir by growing vine tomatoes twenty-five feet high in his backyard without the use of soil. William Gericke coined he modern day term Hydroponics in 1937 because aquaculture was already used to refer to aquatic organisms. He was reluctant at first to share his secrets and did not publish any details on his experiments until after he retired from UC Berkeley in 1940. During WWII in a place called Wake Island vegetables were grown hydroponically to feed to passengers on Pan American Airlines when they stopped at this refueling station. Wake Island is a rocky atoll; which has no soil on it in which to grow and it would have been too expensive to airlift in fresh vegetables. Disney orld opened an exhibit called The Land Pavilion in 1982 in their famous EPCOT center, which features a variety of hydroponic growing techniques. Nowadays hydroponics is not Just limited to researchers it has become available to the average citizen and is only beginning to be applied to agriculture in a much broader spectrum this past decade. The benefits of greenhouse hydroponic production are many. In controlled environment the farmer can have control over temperature, humidity, water, nutrients, C02 levels, and even light periods. One main benefit is that no soil is equired, that means there is nothing to till and much labor is eliminated from the growing process. Growing can be done regardless of soil quality and composition. A huge benefit is that water can stay in the system and be reused. Even though water is the main carrier of nutrients hydro systems are able to deliver Just the right amount of water and can reduce waste. Water can be re-circulated in the system and water use is typically 50-90% less than that used for soil crops which are subject to leaching and drainage capabilities. Plant roots can drown hydro takes this into ccount by using highly oxygenated water and preventing anaerobic conditions. So has complete control over nutrition and nutrition costs are lower and applications are more effective and efficient. Plants can absorb the nutrients much faster when they are suspended in water instead of clinging to soil particles. Yields are usually higher and of better quality with more stable results. Because hydro can be grown very densely and even vertically on shelves farmers are able to grow a larger number of plants in a much smaller area. Land use is reduced greatly and allows for farms to e closer to urban areas where they have a shorter distance to travel from harvest to local markets and kitchens. Many hydroponic researchers boast that produce harvested is of higher nutritional value and considered fresher because some crops, like lettuce, can be harvested with roots and remain fresh longer. Pests and disease are easier to contain and get rid of in controlled environments and the sterile environment allows for use of Integrated Pests Management programs that focus on biological controls and reduce the use of harmful pesticides. Disadvantages of hydroponic farming can be the loss ofa buffer, soil, any failure n the system , equipment failure, power outage, can lead to very quick death or damage of an entire crop. Pathogens can breed in these high moisture environments and young plants are susceptible to verticillium wilt and can die from dampening-off. In extreme environments water temperatures must be monitored and controlled so that you dont have any freezing or cooking of your roots. It is much easier and less expensive to heat or warm water in the system than to keep it cool. In desert regions enclosed systems are preferred to prevent loss of water through evaporation. The most common disadvantage is the extremely high cost of start-up and equipment. Since hydroponics is a growing technology the USDA and other organizations often have grants available for farmers working in hydroponics. In 2012 Living Water Farms was the recipient of one of the USDAs Value Added Producer Grants which are awarded to sustainable business ideas. Crop choice is taken into consideration because of the costs involved and certain limitation. Commonly lettuce is probably the vegetable most often grown hydroponically because it is quick and easy. Farmers can go from planting to arvesting a lettuce crop in as little as 30-45 days that allows them to get about 10 harvests out in one year. Tomatoes are another huge hydro crop, some of the largest North American Hydroponic farms focus on tomatoes production, from beefsteak, to vine ripe and cherry. Euro Fresh Farms in Arizona harvest approximately 250,000 tomatoes daily in mid summer. Euro Fresh Farms are also certified pesticide residue free and practice land and water conservation, solar panels are integrated into the design of the greenhouses to further reduce energy costs and the companys carbon footprint. After harvest, excess plant material is composted and waste is reduced. Euro Fresh Farms are not organic but they boast a ten plus year history of contamination free produce and claim to be better than organic because they dont use animal fertilizers which can contain food borne illness like e-coli and salmonella. The other crop they grow besides tomatoes are cucumbers. They are certified by the North American Greenhouse Hothouse Vegetable Growers, and dont use any GMOs. Locally Kennys Strawberry Farm is a great place to visit to see hydroponics working to produce fresh strawberries. The Temecula Valley farm has a u-pick hydro ground away from the reach of rodents and soil borne pathogens. They claim to be all natural and have heartier and healthier strawberries which are not picked until they reach ideal ripeness and redness. Their motto is we grow em You pick em where you can have a family outing and pick strawberries without ever getting dirty. Hydroponic farms in general tend to be smaller, because of costs and provide local markets and restaurants. Most are family businesses that practice sustainability and conservation. They produce a variety of vegetables and herbs, even feed for ivestock. Around the world hydroponics are already being used. There are huge hydro-lettuce fields in Japan, Germany, Pakistan, Australia, and places like the Philippines. Countries like Pakistan are reducing their need for imported produce and are actually beginning to export produce themselves. In the past their soil was considered useless for cultivation, but with hydroponics they are a growing success. In Conclusion, hydroponics is indeed a growing industry and I suspect that as our land gets more populated and developed we will see a rise in this industry. It can be sustainable and health conscience. You can grow more in a small area so it is welcoming to smaller property owners and perfect for urban areas. With each technological advance we get more precision out of every crop. REFERENCES All Season Greens I Easily Produce Your Own Low Cost, Highly Nutritious, Living Feed, 365 Days a Year! All Season Greens I Easily Produce Your Own Low Cost, Highly Nutritious, Living Feed, 365 Days a Year! N. p. , n. d. Web. 3 May 2013.. Beyond Sustainability. Windset Farms. N. p. , n. d. Web. 29 Apr. 2013.. Certified, Greenhouse, Vegetables, Growers. Certified Greenhouse/Hothouse Vegetable Producers Association of North America. , n. d. Web. 01 May 2013.. Drought and Heat? Some Farmers Try Hydroponics. NET. N. p. , n. d. Web. 29 May 2013.. Hydroponics in Action Organic Basil, Lettuce, Tomatoes, Herbs and Other Tasty Produce Year Round. N. p. , n. d. Web. 01 May 2013.. Rana, Imran. High-tech Agriculture: The Extraordinary Profits of Hydroponic Vegetable Farming. The Express Tribune High-tech Agriculture The Extraordinary Profits of Hydroponic Vegetable Farming Comments. N. p. , 23 Mar. 2012. Web. 1 May 2013.. Strawberry Farm. Kennys Strawberry Farm. N. p. , n. d. web. 2 May 2013..

Analyze the main theories in Origin of Species by Charles Darwin and Essay

Analyze the main theories in Origin of Species by Charles Darwin and then present arguments by his detractors and supporters for these theories - Essay Example Immediately and after the theory was proposed, there were many supporters and many detractors who questioned the validity of the theory and its applicability in the word. The book was controversial and it still remain controversial apparently due to the contradiction that it made to the religious belief of the people at that time and the fact that the contribution that it continued to express between the scientific and religious world. There were also many scientists who supported and many who refuted the theory as not applicable and a mere protrusion of Darwin’s mind. Since then there have been an evolution of the theory but some of the principles of the postulation of the theory are still acceptable to the world of science. But the subject of creation and evolution still attracts ranging controversy in the world. (Jenkins, 2002) The theory can be summarized into some key postulations which showed how species survived in their natural environment. The theory of survival for the fittest and eliminating by natural means showed that the current species that we have been a product of the genetic material that makes up the species and the natural environment under which they live. The theory postulated that species are likely to survive in the environment when there are favorable conditions that can allow for the evolution to take place. As such species changes as the environment changes and therefore it is the way a species adapts to the environment that determines how the species will survive in the environment. In the course of his adoption, they undergoes different structural changes which are all meant to give them adaptive feature that the will help them to survive in the environment. (Ronald, 1994) Therefore we can say that it is the nature which selects the right individuals who will survives in the environment. The theory was hence called natural selection theory

Interracial Marriages Essay Example | Topics and Well Written Essays - 750 words

Interracial Marriages - Essay Example The US Census Bureau states that in the year 1970, there were 65000 black-white marriages in US. In 2005, this number has increased to 422000. Interracial marriages make less than 10 per cent of the total presently. Being an African-American that was first married to a man from the same race and now, is married to a Caucasian, (Landry) has sufficient experience to make a balanced approach to evaluation of the merits and demerits of interracial marriage. Landry has spent five years with the African American husband who was her college fellow. After divorce, she married the Caucasian husband and has been living with him for four years. When she reflects back upon the two experiences, she realizes that race was never a strong issue. Landry parted ways with her ex-husband because there was communication gap between them and he was disloyal to her. Besides, they had issues related to money. Therefore, when Landry searched for a husband the second time, she placed more emphasis upon his co mmitment towards budget and his tendency to exchange views frequently and maintain loyalty to her in marriage than the race he belonged to. Landry spent twelve years as a single after her divorce. In those years, she spent tome with numerous men from different ethnic origins. Having dated men of different professions and racial backgrounds, Landry reached the conclusion that two people’s resemblance in the level of intelligence, personal interests, aspirations and values were much stronger determinants of their compatibility with each other than race could ever be. Landry has evaluated the potential advantages and disadvantages of interracial marriages in this article. Discussing the pros of interracial marriages, Landry first discusses personal growth. Successful marriage requires the partners to grow together with the passage of time. Marital partners can enhance their growth by sharing with each other and appreciating the challenges arising from their cultural and racial d ifferences. Landry has noticed that her Caucasian husband’s behavior is changed for the better after marrying her. He has started to understand how people of color may feel like strangers in settings where the others don’t look like them. He had a new experience of going to church with an African American wife as a lone white man. Nevertheless, he has started to enjoy the worship services greatly. Now he responds more to his African American friends who tend not to go with him when he invites them to go to places where African Americans are not very likely to be. Such awareness has inculcated in him the need to persuade people into doing things that they would otherwise not do because of their race. Landry and her family had many preconceived notions about the Caucasian people until she and her family had an opportunity to interact with Landry’s husband and his family frequently. Same can be said about Landry’s husband and his family. Before, Landry thoug ht that Caucasian people were insensitive, stern and unaffectionate, but she found her husband’s Irish American family unusually jolly. Landry still has to resist the long cultivated urge to meet them by shaking hands with them that she has been doing all life long. Now Landry disputes with her African American friends for their baseless claims about the Caucasian people. Interracial marriage is a potential means of eliminating the social segregation. With the increased intimacy between Landry’s Caucasian and African American families developed in joint gatherings, every member of the respective families is likely to increase his/her number of friends outside his/her own race. Living together is a better way to end the differences between races than government mandated programs or diversity training. The first con