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Physics Essay

Materials for a Business Jet
For aluminum 2124, used T351 condition/temper. Kevlar K49 used for density, shear strength and modulus, and yield strength. For density and ultimate tensile strength, used Dupont Kevlar 49 Aramid fiber. For CFRP, data is for Type P-VSB-32 (Union Carbide) carbon fibers.Aluminum alloy 7475 has lower impurity limits than 7075. Aluminum 7475 is used for aircraft structures because of its good fracture toughness. As noted in table 2, fracture toughness is greater in the 2xxx series aluminum alloys
Pages: 5 (1250 words), Essay
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MRES 7005 _Fast Imaging Techniques (EPI >Echo planar Imaging)
Also, just half of the data of the image can be gathered that can be further synthesized through conjugation to obtain the remaining data. Flexibility in contrast can be used to produce an image similar in standards to that of an SE image with the same TE and TR by using an excitation pulse in the front part followed by a 1800 pulse (T2* dephasing) to create the first echo.EPI uses the Blip EP method of phase encoding where each phase blip between echoes causes a shift in k-space line. Each
Pages: 10 (2500 words), Essay
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MR safety and Monitorin
Sedation also poses greater threat among those at risk of respiratory and cardiac problems or any change in physiologic status, since the sedated patient may get into respiratory depression or hemodynamic imbalance without being able to inform the MRI technologist. In addition, injured or critically ill patients can acquire central nervous system or cardiorespiratory complications once given with anesthesia (Medical Advisory Secretariat, 2003). These risks add onto the health problems that may
Pages: 9 (2250 words), Essay
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Multiphoton Excitation for organic complex
Unless, the value of cross section is reach to saturation level.Under fig 4.1, the linear absorption spectra of the organic materials p-PhN-OF(n)-TAZ series (n = 2 ~ 6) was dissolved in Toluene solution, the series exhibits the two absorption peaks characteristics. The weak absorption peak appears around 300-310 nm attributed to the n* transition of triarylamine moieties and the broad absorption band spanning from 378-415 nm corresponds to the * transition of fluorene-based
Pages: 48 (12000 words), Essay
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Magnetic Resonance Imaging Technique
Additional magnetic fields can facilitate learning about the information regarding the origin of the 3D space during the scan. Fields generated through passing electrical current via gradient coils results to varying magnetic fields in reference to position of the magnet. This also alters the frequency of the signal, as it depends on the origin of the signal. Mathematically, the distribution of the signal can also be recovered from the body; however, this uses the inverse frontier
Pages: 8 (2000 words), Essay
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Magnetic Resonance Instrumentation :Phased Array Coils: What are the Pros and Cons
The overall time from scanning to image reconstruction is still lower compared to alternatives. The report tells us how the process can be further improved by improving technologies tied to image processing, to improve image quality and image reconstruction times.The overall picture one has from the discussion on parallel imaging is this: parallel imaging techniques using phased array coils are highly flexible. They also have high SNR characteristics. Essentially, parallel imaging can allow for
Pages: 4 (1000 words), Essay
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MRI Gradient Coils
Researcher wrote in the second paragraph of the abstract, “Human research magnets of 7T and 8T are operation in several site worldwide.” However, it is quite disturbing why these types of magnets were mentioned in the abstract but nothing in the research paper discussed these things. Said sentence therefore appears to be irrelevant. Thus, the researcher must either discuss these types of magnets in the body of the paper or better yet, totally delete the above-quoted sentence.In addition,
Pages: 4 (1000 words), Essay
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Mesa Verde Park - Essat
The cliff face provides unremitting source of water for the people who live along the alcoves as well as the undying beauty of the same to the tourists who vat the place. Excessive calcium carbonate in the area is dissolved by the constant water that flows through the area ensuring that the sandstones are held together at all times (Chronic and Chronic 97). However, the continuous process eventually leads to the sandstone falling apart to single grains of sand which are blow away by the wind or
Pages: 4 (1000 words), Essay
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Mixture and a compound
Components of a compound are held together by strong covalent bonds unlike in mixtures, whose components are held loosely by weak forces.Elements and compounds are pure substances, but unlike compounds, elements cannot be split further. According to Stoker ( 2012, p.16) “a pure substance can be classified as either an element or a compound on the basis of whether it can be broken down into two or more simpler substances by chemical means.” In the event where compounds are heated or broken
Pages: 5 (1250 words), Essay
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Mars Reconnaissance orbiter
Of the deposits of minerals that had formed specifically in water in Mars over longer period of time and the evidences of shorelines of prehistoric lakes and seas. Moreover, the studies of MRO indicated the amount of deposits in layers that took place due to flow of water in Mars. After acquiring a brief idea about the studies conducted by MRO and its focus upon seeking evidences concerning the prevalence of water in Mars, it can be affirmed that it might attract the viewers or the individuals
Pages: 12 (3000 words), Essay
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Marine Geography and Naval Power in the South China Sea
Basing on this background, the countries involved on the territorial claims have been preparing themselves should armed conflicts erupt. Vietnam has been especially active in upgrading its naval capabilities by increasing arms trade particularly with India and Russia. Active since 1955, the Vietnam People’s Navy is presently staffed with 45,000 personnel, with a total of 66 submarines and surface ships (Cooke & Anderson 98). On its part, the Philippine Navy is a 24,000-strong force that is
Pages: 4 (1000 words), Essay
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Many topics you can chose from
Below the water table, all spore spaces are saturated with water. This zone is known as phreatic zone. There is a substrate that slight porosity and allows little transmission of ground water. This substrate is called an aquitard. Aquifers have diverse features depending on the geology, and the structure of the substrate as well as the topography in which they happen. Aquifers that contain a high amount of water are situated in sedimentary geologic formations. Crystalline rocks that are
Pages: 12 (3000 words), Essay
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