Sunday, May 17, 2020
Ã¢â¬Å"Emaciated polar bear, whatÃ¢â¬â¢s to blame?Ã¢â¬ this heart-breaking photo about an emaciated polar bear in artic was published by CNN in September 14th , 2015. Possible causes for that bear is probably sickness or aging. However, a favorable debate is that the global warming diminishes the natural habitat and food source. This is not a new issue. Global climate change - people try to control it. One of the most powerful ways is to replace the limited amount of fossil fuel, coal, and oil with clean energy. Among several kinds of clean energy, wind power is at the first stage of developing, but promise more than one advantage and for both human being and other living species. It is worthy to be invested on. Scientists have been in a researching marathon to find the newest energy source to expand the variety of energy options. The alternative energy is used to call all the energy sources that replace using of fossil fuel. This tradition al kind of energy has enormous impact on the environment and threat the existence of living species. Specifically, renewable energy is unique type of energy that canÃ¢â¬â¢t be exhausted and be constantly renewed. This includes water, sunlight, geothermal heat, tides, and biomass. Being outstanding, wind power is now a major source of renewable energy in the US. As of April 2011, more than 41 GW of wind capacity has been installed, all of which is on land (Dhanju, Firestone, and Kempton). A single 1 MW turbine on land can provide enough electricity toShow MoreRelatedEssay about Global Warming: A Dangerous Reality1439 Words Ã |Ã 6 PagesGlobal Warming has been a nuisance to environmentalists in recent years. It has been affecting EarthÃ¢â¬â¢s ocean s, habitats, and biodiversity. Over the years, scientists have conducted experiments to understand the causes and effects of global warming and they have searched for solutions. They have warned others about the dangers of pollution and human activities and have urged others to do something about it. Films, such as Al GoreÃ¢â¬â¢s documentary Ã¢â¬Å"The Inconvenient TruthÃ¢â¬ , have also raised internationalRead MoreEssay on Global Warming: Humans Are Destroying the Planet1327 Words Ã |Ã 6 Pagesthat global warming is a serious environmental health problem with its effects reflecting on nature and all of mankind on Earth since the mid-twentieth century Ã¢â¬â emission of concentrated greenhouse gases, rise of sea levels, melting of polar ice caps, and increase in global surface air temperature. The rise in global surface air temperature causes frequent droughts in dry areas and accelerated ocean warming and hence the rapid increase in sea levels and melting of the polar ice caps. Natural disastersRead MoreThe Human Of Endangered Species1309 Words Ã |Ã 6 PagesThe environment has always been one of the primary sources credited for the existence on Earth. The environment has provided the human race and Earth with the essentials needed and more for survival. Both living and nonliving things play a role in continuing the constant cycle that keeps everything maintained and in order. When something as small as a plant or as large as a bear is taken from the cycle of life, there are major effects that occur and bring negative problems. Humans are most likelyRead MoreGlobal Warming And Its Effects1331 Words Ã |Ã 6 PagesGlobal Warming Global warming is the causation of the Glaciers melting, sea levels rising, cloud forests drying, and wildlife struggles today. Humans are making this possible because of their release of heat-trapping gasses known as greenhouse gasses by their modern devices. Global warming is the abnormal speedy increase in the EarthÃ¢â¬â¢s average surface temperature. It is believed that this is due to the greenhouse gasses that people release into the atmosphere by burning fossil fuels.The greenhouseRead MoreGlobal Warming Is A Controversial Issue1602 Words Ã |Ã 7 PagesScientists are warning us about the deleterious effects of Global Warming, Ã¢â¬Å"NonscientistsÃ¢â¬ also have separate views on the same issue. This indicates that Global Warming is a controversial issue that needs to be addressed. First, we need to understand the concept of Ã¢â¬Å"Global Warming.Ã¢â¬ Global Warming is described as the general increase in atmospheric temperatures worldwide, which results to clima te changes. According to an article titled Ã¢â¬Å"Global Warming,Ã¢â¬ the earthÃ¢â¬â¢s atmosphere contains various gasesRead MoreHumans Cause Global Warming1142 Words Ã |Ã 5 PagesGlobal Warming Debate Today we are debating the important topic of global warming. As the affirmative team, we strongly believe that global warming is caused by the actions of humans. But this is not just a belief, this is a fact. Global warming, by definition, is a gradual increase in the overall temperature of the earth s atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants. The greenhouse effect is the trapping of theRead MoreEffect of Climate Change on Animals Essay949 Words Ã |Ã 4 Pagesthat animals are being affected by climate change. Even though the effects are difficult to measure, there are many different ways animals are being affected. With the loss of predator and prey species it affects the life cycles in the food chain. The earthÃ¢â¬â¢s climate change causes habitats such as snow, ice, or forest areas to alter, resulting in loss of habitat and food accessibility as well as causing extinction. Global warming is the name given to the increase in the earthÃ¢â¬â¢s surface temperatureRead MoreGlobal Climate Change Essay1531 Words Ã |Ã 7 PagesGlobal Climate Change Climate change is not a new concept; in fact there is evidence of major climate changes throughout the earths history. However since the industrial revolution and especially since world war two, there has been an unprecedented change in the earths atmosphere (Gates 4). As of March 1999, scientists reported the construction of a thousand-year record of the average temperature on earth. The results of their study concluded that a nine hundred-year cooling trend hasRead MoreThe Issue Of Global Warming1701 Words Ã |Ã 7 Pages The Issue of Global Warming Even though some people believe that there is no such thing as global warming, there has been significant evidence that the Earth is warming. Most scientists believe that the main cause of global warming is human influence. The burning of fossil fuels and the use of fertilizers are the main contributors to the heating of the Earth. Many problems occur as a result of the climate changing. As the climate changes, some animals may become extinct, there is a rise in seaRead MoreThe Consequences Of Global Warming1579 Words Ã |Ã 7 PagesConsequences of Global Warming What does someone think of when the topic of global warming is presented? They might think of the earth warming, or the sun burning up, but do they think of the affects this issue has caused our Mother Earth or think about what they do on a day-to-day basis as being the prime contributor to this environmental problem? Do they realize or even worry about the next generation dying because of the various factors of global warming? Some may think of global warming as a tale or
Wednesday, May 6, 2020
Ã¢â¬Å"A people without the knowledge of their past history, origin and culture is like a tree without roots.Ã¢â¬ - Marcus Garvey. Knowledge is such a valuable thing that if not discovered by people it can make them lose precious knowledge . In the book Fahrenheit 451 valuable knowledge that could be at people s fingertips are banned. The dystopian novel that Ray Bradbury wrote takes you through the main character Guy Montag life as he discovers there s more to than what meets the eye. In this world society had been corrupted and it is now acceptable to rebel because these following circumstances are true, people are brainwashed into thinking there are no good deeds, technology has taken over life itself, and valuable knowledge is banned. ItÃ¢â¬ ¦show more contentÃ¢â¬ ¦But that was along time ago when they had things different.Ã¢â¬ Page Kids used to be the face of innocence until they got shown some of the finer things in life such as cars, artillery , etc. So now children are afraid of kids there age because all they think is that they kill each other and donÃ¢â¬â¢t think about any of the good deeds. It is acceptable to rebel when society is corrupt because technology is taking over life. Technology has overpowered many aspects of life but could you imagine just by a drop of chemicals you could control what is supposed to be an animal. Ã¢â¬Å" All of those chemical balances and percentages on all of us here in the house are recorded in the master file downstairs. It would be easy for someone to set up a partial combination on the hounds Ã¢â¬ËmemoryÃ¢â¬â¢, a touch of amino acids perhaps. That would accout foe what theaniaml did just now. React to me.Ã¢â¬ Page Animals controlled by the drop of a chemical, well there not even animals anymore because technology has overruled that part of life now too. Imagine instead of going to the beach you can just ask your t.v and you will be there within seconds, but is it actually experiencing things if u just stay in the comfort of your home? Ã¢â¬Å" Thank god for that. You can shut them, say, Ã¢â¬Å"Hold on a momentÃ¢â¬ . You play god to it. But who has ever torn himself from the claw that encloses you when you drop a seed in a TV parlor? It grows you any shapeShow MoreRelatedComparison Of Technology In Fahrenheit 4511151 Words Ã |Ã 5 Pagestechnology, from old to new. Both Ernest Cline and Ray Bradbury present worlds that are run by technology.The technology in ready player one and Fahrenheit 451 is both bad and good. Fahrenheit 451 is all about a fireman called Guy Montag who does the opposite of what fireman do, starting fires instead of putting them out. The society in Fahrenheit 451 is forbidden from reading books.People spend their time watching big TVs, radios.MontagÃ¢â¬â¢s wife Mildred spends her time watching and is addicted toRead MoreFahrenheit 451: the Firemen851 Words Ã |Ã 4 PagesRay BradburyÃ¢â¬â¢s Fahrenheit 451 staunchly contrasts these other writings; rather than presenting some omniscient tale admonishing its audience of the dangers of government hierarchy, Bradbury uses satire to criticize primarily emerging trends in society, providing an account that deems them equally as harrowing and dangerous as some authoritarian government, although he does include a limited number of strands involving an anti-government theme. This unique aspect of Fahrenheit 451 has earned the attentionRead MoreEssay about Future Concerns - Gattaca and Fahrenheit 4511562 Words Ã |Ã 7 PagesPopular fictions texts expressing views of the future educate audiences about current issues and the dystopias that develop from them. Texts such as the film Ã¢â¬ËGattacaÃ¢â¬â¢, directed by Andrew Niccol and novel Ã¢â¬ËFahrenheit 451Ã¢â¬â¢ by Ray Bradbury explore futuristic societies and the implications that become of their innovation. Although entertaining, texts such as these are didactic and must be taken seriously, as they communicate messages to audiences regarding prevalent concerns and possible futures basedRead MoreFahrenheit 451 By Ray Bradbury1802 Words Ã |Ã 8 Pages75 hours on electronic media and that adults spend at least 77 hours. This obsession with technology was inferred long before smartphones were created. Although it was written in 1953, the novel Fahrenheit 451 by Ray Bradbury envisions a future consumed by electronics akin to todayÃ¢â¬â¢s society. Fahrenheit 451 mirrors the present society because it exhibits the misuse of technology, the influence that technology has on relationships, and the lust for eternal bliss. First, Bradbury anticipates the currentRead MoreAlliteration In Leda And The Swan By Ray Bradbury1852 Words Ã |Ã 8 Pagesusually) (Literature: A Portable Anthology). Example: In Fahrenheit 451, Montag states, Ã¢â¬Å"ItÃ¢â¬â¢s fine work. Monday burn Millay, Wednesday Whitman, Friday Faulkner, burnÃ¢â¬â¢em to ashes. ThatÃ¢â¬â¢s our official slogan.Ã¢â¬ The repetition sound of Ã¢â¬Å"M,Ã¢â¬ Ã¢â¬Å"W,Ã¢â¬ and Ã¢â¬Å"F,Ã¢â¬ show alliteration (Bradbury 6). Allusion: A reference to a well-known person, place, place, event, literary work, or work of art (Literary Devices). Example: On page fifty-seven of Fahrenheit 451, Beatty says, Ã¢â¬Å"Colored people donÃ¢â¬â¢t like Little Black SamboRead MoreFahrenheit 451 By Ray Bradbury2277 Words Ã |Ã 10 Pages Imagine a society completely run by technologyÃ¢â¬ârobotic workers, home theatres, supreme medical care. Despite the benefits technology could provide, its flaws are masked away by the glossy image created by the media. Fahrenheit 451 focuses on a dystopian society, taken place in the future, where technology is deeply engraved into the peopleÃ¢â¬â¢s lifestyle. With technology playing a major role in their lives, the people are isolated from their world as they are not exposed to many aspects of being humanÃ¢â¬âknowledgeRead MoreRay Bradbury s Fahrenheit 4512323 Words Ã |Ã 10 PagesPicture a world where one must meet the expectations of being normal, where diversity is not accepted, or even worse, a detached society where emotions no longer exist. By reading the first few pages of Fahrenheit 451, readers immediately get the feeling of a dystopian society. Firemen creating fires, instead of extinguishing them, and technology that has taken their society to a whole new level of entertainment. These are exaggerated ideas right off the bat, yet Ray Bradbury carries the readersRead MoreHuman Nature In Fahrenheit 4511349 Words Ã |Ã 6 Pagesof human nature. The Crucible a play by Arthur Miller, is an allegory for the Cold War politics and examines the tensions that occur between one s perception of what is moral according to human nature when constrained by a theocratic society. Fahrenheit 451 a dystopian novel by Ray Bradbury, shows how oppressive governments can never succeed in trying to force conformity in one s human nature. The Lottery is a dystopian shirt story, by Shirley Jackson and demonstrates conformity and rebellion, andRead MoreCritics of Novel 1984 by George Orwell14914 Words Ã |Ã 60 Pagesimportant aspects of 1984: The setting of 1984 is a dystopia: an imagined world that is far worse than our own, as opposed to a utopia, which is an ideal place or state. Other dystopian novels include Aldous Huxleys Brave New World, Ray Bradburys Fahrenheit 451, and Orwells own Animal Farm. When George Orwell wrote 1984, the year that gives the book its title was still almost 40 years in the future. Some of the things Orwell imagined that would come to pass were the telescreen, a TV that observes thoseRead MoreLogical Reasoning189930 Words Ã |Ã 760 Pagesmention the word Ã¢â¬Å"declarative.Ã¢â¬ Also, we usually donÃ¢â¬â¢t use the word Ã¢â¬Å"logically.Ã¢â¬ Ã¢ââ¬Ã¢ââ¬Ã¢ââ¬Ã¢ââ¬CONCEPT CHECKÃ¢ââ¬Ã¢ââ¬Ã¢ââ¬Ã¢ââ¬ Create two sentences about basketball that are inconsistent with each other. Ã¢ââ¬Ã¢ââ¬Ã¢ââ¬Ã¢ââ¬5 Examples of Good Reasoning So far weve explored the importance of reasoning logically in situations that require a decisionÃ¢â¬âeither a decision about what to do or a decision about what to believe. Along the way weve introduced a variety of rules of thumb for good reasoning, that is, high-quality reasoning
Questions: 1.Provide an Opinion regarding which antenna types will become the Dominant Players in the future of medium- and long-distance Wireless links 2.Compare and contrast the multiplexing techniques CDMA and FDMA in the area of Wireless Networking? Answers: 1.Differences Yagi, horn, cellular antenna Yagi antenna is also known as the Yagi-Uda array is the directional antenna which is often used for the communication whenever the frequency is above 10 MHz. This kind of antenna continues to be popular among the Amateur radio and the Citizen Band radio providers (Ammann John, 2005). It will be utilized at a number of the surface in the installation of the satellite communications techniques (Ammann John, 2005). The antenna offers unidirectional radiation in addition to the response pattern, however it concentrates the radiations and the response. Strengths It has a gain which allow a lower strength of the signal to be received. It has a directivity which enables the interference levels to be minimized. It design of the antenna is able to filter on the signal noise which is coming from the opposite direction (Chieh, Dick, Loui Rockway, 2014). This consequently tends to make Yagis the right choice when you have a high demand application for example the telecommunications. It is significantly simpler to aim the Yagi antenna than a few of the other arrays. There construction causes them to be much simpler to mount on the vertical towers. Weaknesses There is limitation of the bandwidth or the frequency. In case an individuals wants to have a high gain level, the antenna need to be very long. This kind of antenna experiences a degradation for the electrical characteristics as one moves away from the frequency range (Chieh, Dick, Loui Rockway, 2014). Horn antenna This really is an antenna which consist of the flaring metal waveguide which is shaped similar to the horn to direct the radio waves in the beam (Pelletier, Olvera-Hernandez, Watfa Ahmad, 2017). The horn has been utilized extensively especially to the UHF and the microwave frequencies, which is above the 300 MHz. Strengths Impedance matching is very good It has a greater directivity There is narrower beam width There is standing waves which are avoided. Weaknesses The designing of the flare perspective determines on the directivity The flare angle in addition to the length of the flare really should not be very small. Cellular antenna This antenna is utilized in the alignment with the powered signal booster for example the inline amplifier, repeater or even the connected directly to cell phone or maybe other devices which are with the cell adapter cable or even the coax adapter (Chieh, Dick, Loui Rockway, 2014). Strengths There is increased number of the users, due to the targeted nature of the frequencies of the antenna could be reused allowing on the increased on the user number. There is increased bandwidth: the bandwidth which is available increase from the reuse of the frequencies and adaptive arrays (Chiu, Liu, Gao Ying, 2013). Weaknesses It is more expensive, the cellular antenna are very complex, which uses the latest processing technology. There is the issue of location. The location needs to be considered that is optimal operation for the antenna. The antenna which would become dominant in these three would be cellular antenna. The reason for the choice is that there is increased number of users, as a result of the target frequencies and there is increased bandwidth (Chiu, Liu, Gao Ying, 2013). 2. Compare and contrast CDMA and FDMA. Similarities In both of these two techniques of wireless networking they uses the access technology. This is where the users is allowed to access on the single channels via the use of the resource allocation system. The users are able to establish on the communication within the network (Nilsson, 2009). In both there is the sending and receiving of the data which allows the flexible allocation of the resources. Additionally, both of these technologies have been used in the mobile devices application where the FDMA has been the analog version and the CDMA has been the latest technology through use of the 3G technology (Nilsson, 2009). Contrast CDMA is the telecommunication technique that is used in most radio communicating organization in order to access the communicating channels within minimum time whereas in FDMA is the technique which is used in the advanced Mobile Phone (Pelletier, Olvera-Hernandez, Watfa Ahmad, 2017). Additionally, when it comes to the FDMA the technique is used for the analogue mode of transmission, the technique is not effective in the transmission of the digital signal whereas when it comes to CDMA it is digital mode of the transmission which is 3G technology (Waldschmidt, Fugen Wiesbeck, 2002). In the FDMA technique it allows the total available bandwidth to be divided into the various frequencies whereas when it comes to CDMA the users are provided with the communication platform in which each is given the equal bandwidth level that has a similar speed of transmission as well as the same frequency. In the CDMA there is no fixed number of the users as comparison to the FDMA techniques (Pelletie r, Olvera-Hernandez, Watfa Ahmad, 2017). Moreover, the FDMA coordinates the access of the frequencies through the multiple users whereas when it comes to CDMA the access of the frequencies is through single users. The FDMA technology is used in the analog mobile phones whereas the CDMA uses the 3G technology which is used in most of the mobile devices References Ammann, M., John, M. (2005). Optimum design of the printed strip monopole. Chieh, J. C. S., Dick, B., Loui, S., Rockway, J. D. (2014). Development of a Ku-band corrugated conical horn using 3-D print technology. IEEE Antennas and Wireless Propagation Letters, 13, 201-204. Chiu, C. Y., Liu, X., Gao, F., Ying, Z. (2013, April). Constraints and performances of various antenna types in commercial mobile terminals. In Antennas and Propagation (EuCAP), 2013 7th European Conference on (pp. 894-897). IEEE. Pelletier, G., Olvera-Hernandez, U., Watfa, M., Ahmad, S. (2017). U.S. Patent No. 9,648,657. Washington, DC: U.S. Patent and Trademark Office. Nilsson, M. (2009, May). Directional antennas for wireless sensor networks. In Proc. 9th Scandinavian Workshop on Wireless Adhoc Networks (Adhoc'09). Waldschmidt, C., Fugen, T., Wiesbeck, W. (2002). Spiral and dipole antennas for indoor MIMO-systems. IEEE Antennas and Wireless Propagation Letters, 1(1), 176-178.