Elastic techniques

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  • In 1932, James Chadwick discovered the neutron, but initially the only sources of neutrons were from the radioactive decay of unstable nuclei. It was not until 1942 when Enrico Fermi constructed the first nuclear reactor in the squash courts beneath the University of Chicago’s Stagg Field, that a controlled and sustained nuclear chain reaction was achieved. After World War II, nuclear reactors became available for civilian research, and in 1945 Ernest Wollan set up a double-crystal diffractometer at ORNL’s Graphite Reactor. This marks the beginning of neutron scattering....

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  • In any surgical fi eld, the importance of suturing is selfevident. In eye surgery, due to the lack of elasticity of the tissues and the infl uence of sutures on the visual outcome, proper microsurgical suturing technique is paramount. Inappropriate or careless suture placement and knot tying can impact visual function. If wound construction and closure are not astigmatically neutral, the visual outcome will be altered and further surgical intervention may be required. Wound related complications are more severe in the eye than in the skin.

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  • Market structure, conduct performance analysis. Marketing channels for different products in agriculture and animal husbandry. State intervention and parastatals in agricultural marketing. Pricing of agricultural inputs and products. Buffer stocking and import policies for agricultural produce. Value addition and its impact on prices of agricultural commodities. Systems approach to agricultural marketing. Marketing costs, margins and market efficiency. Market integration-horizontal and vertical, spatial and temporal. Price integration between domestic and international markets.

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  • The state-of-the-art of controlled radical polymerization (CRP) in 2011 is presented. Atom transfer radical polymerization, stable radical mediated polymerization, and degenerate transfer processes, including reversible addition fragmentation chain transfer are the most often used CRP procedures. CRP opens new avenues to novel materials from a large range of monomers. Detailed structure-reactivity relationships and mechanistic understanding not only helps attain a better controlled polymerization but enables preparation of polymers with complex architectures.

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  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Percutaneous elastic intramedullary nailing of metacarpal fractures: Surgical technique and clinical results study

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  • About 400 years ago, the invention of telescopes and microscopes not only extended our sense of seeing but also revolutionized our perception of the world. Extending this perception further and further has since been the driving force for major scientific developments. Local probe techniques extend our sense of touching into the micro- and nanoworld and in thisway provide complementary newinsight into theseworlds with microscopic techniques.

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Radiation Oncology cung cấp cho các bạn kiến thức về ngành y đề tài: Validation of an elastic registration technique to estimate anatomical lung modification in NonSmall-Cell Lung Cancer Tomotherapy...

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  • Acoustic emission (AE) is a phenomenon in which elastic or stress waves are emitted from rapid, localized change of strain energy in material. The practical application of the AE first emerged in the 1950's, but only in the last 20 years the science, technology and applications of AE have progressed significantly.

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  • Bhushan, B. “Micro/Nanotribology and Micro/Nanomechanics of Magnetic...” Handbook of Micro/Nanotribology. Ed. Bharat Bhushan Boca Raton: CRC Press LLC, 1999 © 1999 by CRC Press LLC Micro/Nanotribology and Micro/Nanomechanics of Magnetic Storage Devices Bharat Bhushan 14.1 Introduction 14.2 Experimental Experimental Apparatus and Measurement Techniques • Test Specimens 14 14.3 Surface Roughness 14.4 Friction and Adhesion Nanoscale Friction • Microscale Friction and Adhesion 14.5 Scratching and Wear Nanoscale Wear • Microscale Scratching • Microscale Wear 14.

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  • The term engineering rock mechanics is used to describe the engineering application of rock mechanics to civil, mining, petroleum and environmental engineering circumstances. The term mechanics, means the study of the equilibrium and motion of bodies, which includes statics and dynamics l. Thus, rock mechanics is the study of mechanics applied to rock and rock masses. ’Engineering rock mechanics’ is this study within an engineering context, rather than in the context of natural processes that occur in the Earth‘s crust, such as folding and faulting.

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  • About a decade ago, the elastic properties of a single chromatin fiber and, subsequently, those of a single nucleosome started to be explored using optical and magnetic tweezers. These techniques have allowed direct mea-surements of several essential physical parameters of individual nucleo-somes and nucleosomal arrays, including the forces responsible for the maintenance of the structure of both the chromatin fiber and the individual nucleosomes

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