Magnetic Data Essay - 1219 Words

3. DATA AND METHODOLOGY 3.1. Magnetic Data The used data are based on the reduced to pole (RTP) aeromagnetic data (Fig. 2) with contour interval of 20 nT, scale 1:250,000 (total field of the area is 41,400 nT, inclination angle is 37.4 degrees and declination angle is +1.6 degrees). The magnetic data was compiled for the Eastern Desert and the Red Sea, based on Meshref (1990) and available in Saad (1991). The Union Oil Company carried out this survey in 1974. Fig. (2): 3.2. Determination of the Curie point depth (CPD) Magnetic anomalies are produced by grouping the effects from both shallow and deep magnetic sources (Thà ©bault et al., 2010). Consequently, the RTP data contain high wavenumbers and low wavenumbers anomalies together. The†¦show more content†¦The centroid of the magnetic source Z0 can be estimated by fitting a straight line over the low-wavenumber portion of the radially averaged frequency-scaled power spectrum as shown in the flowing formula: †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ (2) Where D is a constant. Therefore, Zt and Z0 of the magnetic body can be determined. The basal depth (Zb) of any magnetic source can be resulted (Okubo et al., 1985; Tanaka et al., 1999) as: Zb= 2Z0-Zt†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.†¦Ã¢â‚¬ ¦.. (3) The obtained bottom depth (Zb) of the magnetic source is equivalent to the CPD. (Bhattacharyya and Leu 1975; Okubo et al. 1985). At Zb, Ferromagnetic minerals are loss their magnetization due to a temperature of about 580 º C. Spector and Grant (1970) generalized their energy power spectrum expression of the map by assuming that the anomalies of any magnetic map are come from a group of vertical magnetic prisms. Smith et al. (1974), Boler (1978) and Connard et al. (1983) applied the expression of this energy power spectrum to define the depth of the deepest magnetic layer. To link the CPD (Zb) with the Curie point isotherm (580 ºC), the vertical direction of temperature variation and the constant geothermal gradient were assumed. The geothermal gradient (dT/dZ) from the CPD (Zb) to the earth’s surface can be derived (Tanaka et al. 1999;Show MoreRelated John Dalton Biography Essay966 Words   |  4 Pagesnecessity of considering the beams of the aurora borealis of a ferruginous iron-like nature, because nothing else is known to be magnetic, and as a result, that there exists in the higher regions of the atmosphere an elastic fluid partaking of the properties of iron, or rather of magnetic steel, and that this fluid, doubtless from its magnetic property, assumes the form of cylindric beams. 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Renewable Energy Resources and their Limitations Essay

Curiosity and desire have led man to the peak of material progress. Discontent has always prompted him to change his environments and living conditions. Change is fundamental law of life for no change no progress. The more the peoples of the world have tried to change and ameliorate and better their lot, the more they succeed. The magic wand behind the spectacular and sustained progress has been the scientific technology. When we survey the achievements of men in their historical perspective; we get a clear idea about technological development from the earliest days from simple to sophisticated. The Present era is the era where energy is the basic resource which is essential for living. The present age can easily be termed as Fossil Fuel†¦show more content†¦Renewable Energy Resources and their Limitations: It is commonly believed that world can fulfill easily through renewable sources of energy if the present energy resources are consumed completely. This is not true. It is estimated that renewable energy resources like wood fuel, farm wastes, solar heat etc. would be able to fulfill only 7 to 15% of the world’s energy requirements. The remaining resources i.e. wind and water power can only fulfill a very small percentage of energy needs while for solar energy, expensive infrastructure is required. Solar Energy As far as the solar energy and its usage are concerned, one major area is installation of photovoltaic solar panels, which will cost more than a consumer, can save in the form of electricity tariffs. However, a collaborative research that was conducted by the professors of University of Ferrara and Bologna revealed that the use of domestic solar PV panels can save up to 2000 kWh per square meter of energy and can work effectively for a period of 20 years. The following table gives a cost comparison of different energy resources. 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My Long March Essay Example For Students

My Long March Essay The Critique of My Long March Lang. 3750 100 Dr. Xiaojun Wang The Critique of My Long March In my class, on July 1st, we watched a movie titled, My Long March, which was filmed in mainland China. This movie employed 110,000 crew/actors and spanned over 6,000 miles of the historical Red Army route. This movie was made in order to commensurate the Seventieth anniversary of the Long March. This film was directed by Zhai Jungie and produced by August First Film Studio in 2006. Zhai Jungie directed an earlier film titled, Axis of War, and My Long March is intended to be a continuation of the storyline. The leading actors in the movie were Zhong Qiu, Wang Ying and Wang Jia. This movie won the Golden Rooster Award for best supporting actor and was nominated in 6 other categories. The story centers around a boy of 13, named Wang Ruir and his memories during the Long March. The movie shows the travels of the Red Army, the loss of his father, sister and brother-in-law during the saga. The movie depicts the relationship between Wang Ruir and military leader, Mao Zedong who is credited with saving the young boy’s life and guiding him tenderly throughout Wang Ruir’s journey into his teenage years. The film is a memoir of Wang Ruir’s and China’s losses during these turbulent times in the country’s history and the perseverance of the Chinese people. Since this movie was intended to commensurate the 70th anniversary of the Long March, many figures, settings and conflicts were based on the true history of China. According to Encyclopedia Britannica the migration of the soldiers was historically correct as the â€Å"communist troops crossed 18 mountain ranges and 24 rivers to reach the northwestern province of Shaanxi†. In addition, the troops were depicted in a very heroic manner which in turn, inspired many young Chinese to join the Communist Party. The movie is set to occur in the 1930s, and the Long March resulted in the move of the communist revolutionary headquarters from southeastern to northwestern China. The geography of the region was filmed very accurately by the director, who followed the real path of the Long March, hence, it contained the real mountains, rivers, and valleys. The costumes were designed fairly authentically using a lot of gray colors and simple designs for the peasants and workers in order to truly show how they lived during this time period. The other props in the movie such as weapons, tools and the lack of heavy artillery depicted the setting in a very realistic manner. In addition, it portrayed the devastation of war on the land and depicted the human suffering in a very lifelike way. I found this film to be very intriguing and it kept my attention throughout the story. It was informative and taught me a lot about Chinese customs, sounds, its people, and their passion for the Great Leader. I consider this a great introduction into China’s recent history. While this film was fairly historically correct and provided many facts, there were also certain obvious embellishments. I felt that the tender relationship between Wang Ruir and Mao Zedong was at times comical. While I don’t doubt that Mao Zedong was very capable of mentoring a young soldier, he has been portrayed in history as stern and serious; hence his combing of young Wang Ruir’s hair with his fingers, as well as their long conversations seemed a bit too much. Not having grown up in Communism, hearing the army songs and dances in the middle of fighting was hard to reconcile. I found that the director was very pro Red Army and Mao Zedong but the propaganda didn’t ruin the film for me. In addition, the movie showed the heartache and loss of family members during war transcends borders, cultures and politics. References Long March. (2010). In Encyclop? dia Britannica. Retrieved July 10, 2010, from Encyclop? dia Britannica Online: http://www. britannica. com/EBchecked/topic/347303/Long-March