Xem 1-20 trên 22 kết quả Nuclear dynamics
  • This book includes contributions from researchers around the world on numerical developments and applications to predict fluid flow and heat transfer, with an emphasis on thermal hydraulics computational fluid dynamics. Our ability to simulate larger problems with greater fidelity has vastly expanded over the past decade. The collection of material presented in this book augments the ever-increasing body of knowledge concerning the important topic of thermal hydraulics.

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  • I. Introduction An important aspect of nuclear reactor core analysis involves the determination of the optimal coolant flow distribution and pressure drop across the reactor core. On the one hand, higher coolant flow rates will lead to better heat transfer coefficients and higher Critical Heat Flux (CHF) limits. On the other hand, higher flows rates will also in large pressure drops across the reactor core, hence larger required pumping powers and larger dynamic loads on the core components.

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  • The International Symposium on Nuclear Structure Physics (NP2001) was held in Gottingen Germany, March 5-8, 2001. The aim of the Symposium was to discuss recent achievements and new initiatives for research in nuclear structure and to celebrate the career of Peter von Brentano.

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  • This book covers new experimental and theoretical studies that focus on the modern developments of nuclear fission, aiming at various applications in a wide range of fields and bringing together scientists working in different fields related to nuclear fission.

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  • NASA’s budget for fiscal year 2003 included funds to begin the Nuclear Systems Initiative focused on research into and development of enhanced capabilities in the general areas of spacecraft power and propulsion systems.

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  • The nuclear pore complex (NPC) is the only gateway for molecular traf-ficking across the nuclear envelope. The NPC is not merely a static nuclear-cytoplasmic transport gate; the functional analysis of nucleoporins has revealed dynamic features of the NPC in various cellular functions, such as mitotic spindle formation and protein modification.

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  • Tham khảo sách 'newapplocations of nuclear fission', y tế - sức khoẻ, y học thường thức phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Few of us can any longer keep up with the flood of scientific literature, even in specialized subfields. Any attempt to do more and be broadly educated with respect to a large domain of science has the appearance of tilting at windmills. Yet the synthesis of ideas drawn from different subjects into new, powerful, general concepts is as valuable as ever, and the desire to remain educated persists in all scientists.

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  • Clients just specify the type of events that they are interested in, and the content that the event should at least contain. Clients do not need to maintain an active presence during the time these interesting events are taking place. Once it registers an interest it should be able to recover the missed event from any of the broker nodes in the system.

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  • This thesis presents time-resolved measurements of the spin evolution of transient carrier populations in III-V quantum wells. Non-equilibrium distributions of spin polarisation were photoexcited and probed with picosecond laser pulses in three samples; a high mobility modulation n-doped sample containing a single GaAs/AlGaAs quantum well, an In0.11Ga0.89As/GaAs sample containing three quantum wells and, a multi-period GaAs/AlGaAs narrow quantum well sample.

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  • Random matrices are widely and successfully used in physics for almost 60-70 years, beginning with the works of Wigner and Dyson. Initially proposed to describe statistics of excited levels in complex nuclei, the Random Matrix Theory has grown far beyond nuclear physics, and also far beyond just level statistics. It is constantly developing into new areas of physics and mathematics, and now constitutes a part of the general culture and curriculum of a theoretical physicist.

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  • Another closely-related dynamic is a fundamental shift that is taking place in terms of priority geographic markets. A 2011 global CEO survey by PricewaterhouseCoopers (PWC’s Growth Reimagined) found that the large majority of corporate executives have shifted their primary focus to developing markets. Although doing business in these markets is nothing new, making them the primary target market, where firms plan to invest the majority of their efforts and expect the majority of their future sales, is new and significant.

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  • NF-jB essential modulator (NEMO) plays an essential role in the nuclear factor jB (NF-jB) pathway as a modulator of the two other subunits of the IjB kinase (IKK) complex, i.e. the protein kinases, IKKa and IKKb. Previous reports all envision the IKK complex to be a static entity. Using glycerol-gradient ultracentrifugation, we observed stimulus-dependent dynamic IKK complex assembly.

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  • Many biological C-H activation reactions exhibit nonclassical kinetic isotope effects (KIEs). These nonclassical KIEs are too large (kH/kD 7) and/or exhibit unusual temperature dependence such that the Arrhenius prefactor KIEs (AH/AD) fall outside of the semiclassical range near unity. The focus of this minireview is to discuss such KIEs within the context of the environmentally coupled hydrogen tunneling model.

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  • The format of this Chapter will be slightly different from that for earlier years. Papers dealing with essentially static situations will be dealt with first – with each Group of the Periodic Table discussed in turn. Results on dynamic systems will then follow – again on the basis of the Periodic Groups, with papers on paramagnetic compounds being dealt with last.

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  • The eukaryotic nucleus is highly dynamic and complex, containing several subcompartments, several types of DNA and RNA, and a wide range of proteins. Interactions between these components within the nucleus form part of a complex regulatory system that is only partially understood.

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  • Since mid-2009, North Korea has admitted it has a uranium enrichment program and implied that it will enrich uranium on a significant scale in the near future. After years of denial, North Korea mentioned its uranium enrichment program in public statements as tensions increased following its ballistic missile test in April 2009, its May 2009 nuclear test, and the subsequent imposition of United Nations Security Council sanctions against North Korean trading entities.

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  • This volume includes papers presented at the XXII Solvay Conference on Physics, which took place from the 24 to 29 November 2001 in the European Culture Centre of Delphi. The Castle of Lamia hosted the events of the last day. The Physics of Communication was the selected theme of the conference. The 5 sessions reflected present challenging issues, namely Decoherence and Irreversibility, Non-locality and Superluminosity, Photonics, Quantum Information and Communication, Quantum Computation.

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  • On 30 June 1908, in Central Siberia of the U.S.S.R., an extraordinary event occurred (Oliver, 1928 ; Crowther, 1931). Eyewitnesses reported a giant fireball moving across the sky followed by an overpowering shockwave. Trees were radially toppled over thousands of square kilometers, seismic and atmospheric disturbances were recorded as far away as England, and the next several nights were sufficiently bright for reading. However, no significant impact crater was formed nor was any extraterrestrial matter found in the immediate area.

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  • HIC1(hypermethylated in cancer 1) is a transcriptional repressor containing fiveKru¨ppel-likeC2H2zinc fingers and an N-terminal dimerization and autonomous repression domain called BTB/POZ. Here, we demonstrate that full-length HIC1 proteins are modified both in vivo andin vitro with O-linkedN-acetylglucosamine (O-GlcNAc). This is a highly dynamic glycosylation found within the cytosolic and the nuclear compartments of eukaryotes. Analysis of [ 3 H]Gal-labeled tryptic peptides indicates that HIC1 has three major sites forO-GlcNAc glycosylation....

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