Tau-Mu Flavor Violation and the Scale of New Physics

Motivated by the strong experimental evidence of large nu_mu - nu_tau neutrino oscillations, we study existing constraints for related mu - tau flavor violation. Using a general bottom-up approach, we construct dimension-6 effective fermionic operators whose coefficients encode the scale of new physics associated with mu - tau flavor violation, which is a piece in the puzzle of the origin of neutrino oscillations. We survey existing experimental bounds on this scale, which arise mostly from tau and B decays. In many cases the new physics scale is constrained to be above a few TeV. We also discuss the operators which are either weakly constrained or, at present, subject to no experimental bounds.Comment: Proceedings for MRST 2003, Joe Schechter Fest, Syracuse University, New York, May 2003. 8 pages, 2 figure

Application and Prospect of Geographical Information System in Strategic Environmental Assessment

Strategic environmental assessment (SEA) is a new and promising tool to evaluate the possible environmental impacts and other sustainability aspects of government policies, plans and programs as well as their alternatives, aiming at the effectively integration of environmental concerns into their decision-making processes. It is recognized that spatial issues are always evolved in the SEA process for the reason that the strategic decision-maker pays much attention to the geographical distribution of various impacts. The essential features of strategic decisions, such as the macro-scale on time and geography, complexity of spatial information and social-economic-environmental multiplex system, are leading to the insufficiency of traditional EIA-based methods in assisting strategic decision-making. SEA practitioners have to seek for more effective approaches to handle the spatial uncertainties. Geographical information system (GIS), integrating computer design and database technology, is able to gather, simulate, analyze and display spatial information effectively, and provides a technological support to the synthesized evaluation and quantitative analysis. Based on the statement of SEA conception and characteristics, the author employs a detailed discussion on the advantages of GIS in SEA process and finds that GIS can not only help SEA operators to grasp the macro-scale of time and geography of strategic decisions much better, but also provide visible and intuitionistic displays on the spatial information to make decision-makers and publics understanding and accepting final conclusions much easier. Meanwhile, the author indicates that GIS with various tools, simulation models and powerful spatial analysis functions, can contribute to a more scientific, synthetic forecast and cumulative effects evaluation; provide much more quantitative analysis and improve the reliability of SEA results. Finally, the challenges and prospects of GIS in SEA process are presented in this paper. Key words: Strategic environmental assessment; Geographical information system; Information display; Spatial analysis Financial supports from National Social Sciences Fund (NSSF) in China: Research on Circular Economy Based on Win-win of Economic Development and Ecological Environmental Protection (06&ZD029) are highly appreciated

Full-scale Mathematical Model and Simulation of Marine Natural Recirculation Drum-boiler

AbstractThrough some reasonable hypothesis and simplification of conflagation, heat and mass transfer, a full-scale dynamic mathematic model of marine natural recirculation drum-boiler is established by modular modeling method via the basic working elements of objects. The dynamic feature of a certain type natural recirculation drum-boiler was studied by this model as an instance, by contrasting the simulative results and real values, the precision and real-time capability of the developed model was testified. This study was helpful for the performance research, working optimize and control strategy building of various natural recirculation drum-boilers

Multiple magnetoplasmon polaritons of magneto-optical graphene in near-field radiative heat transfer

Graphene, as a two-dimensional magneto-optical material, supports magnetoplasmon polaritons (MPP) when exposed to an applied magnetic field. Recently, MPP of a single-layer graphene has shown an excellent capability in the modulation of near-field radiative heat transfer (NFRHT). In this study, we present a comprehensive theoretical analysis of NFRHT between two multilayered graphene structures, with a particular focus on the multiple MPP effect. We reveal the physical mechanism and evolution law of the multiple MPP, and we demonstrate that the multiple MPP allow one to mediate, enhance, and tune the NFRHT by appropriately engineering the properties of graphene, the number of graphene sheets, the intensity of magnetic fields, as well as the geometric structure of systems. We show that the multiple MPP have a quite significant distinction relative to the single MPP or multiple surface plasmon polaritons (SPPs) in terms of modulating and manipulating NFRHT