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Potentially dangerous glacial lakes across the Tibetan Plateau revealed using a large-scale automated assessment approach

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Science Bulletin 2019年第7期64卷 435-445页

作者： Simon keith Allen Guoqing Zhang Weicai Wang TANDong Yao Tobias Bolch Department of Geography University of Zurich Key Laboratory of Tibetan Environmental Changes and Land Surface Processes Institute of Tibetan Plateau Research Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences School of Geography and Sustainable Development University of St Andrews

Glacial lake outburst floods(GLOFs) are a major concern in the Himalaya and on the Tibetan Plateau(TP),where several disasters occurring over the past century have caused significant loss of life and damage to infrastructure. This study responds directly to the needs of local authorities to provide guidance on the most dangerous glacial lakes across TP where local monitoring and other risk reduction strategies can subsequently be targeted. Specifically, the study aims to establish a first comprehensive prioritisation ranking of lake danger for TP, considering both the likelihood and possible magnitude of any outburst event(hazard), and the exposure of downstream communities. A composite inventory of 1,291 glacial lakes(>0.1 km^2) was derived from recent remote sensing studies, and a fully automated and object assessment scheme was implemented using customised GIS tools. Based on four core determinates of GLOF hazard(lake size, watershed area, topographic potential for ice/rock avalanching, and dam steepness), the scheme accurately distinguishes the high to very high hazard level of 19 out of 20 lakes that have previously generated GLOFs. Notably, 16% of all glacial lakes threaten human settlements, with a hotspot of GLOF danger identified in the central Himalayan counties of Jilong, Nyalam, and Dingri, where the potential trans-boundary threat to communities located downstream in Nepal is also recognised. The results provide an important and object scientific basis for decision-making, and the methodological approach is ideally suited for replication across other mountainous regions where such first-order studies are lacking.

关键词： GLOF Hazard Exposure Danger Tibetan Plateau Himalaya

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Two-temperature warm dense hydrogen as a test of quantum protons driven by orbital-free density functional theory electronic forces

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Matter and Radiation at Extremes 2020年第6期5卷 48-59页

作者： Dongdong Kang Kai Luo keith Runge S.B.Trickey Department of Physics National University of Defense TechnologyChangshaHunan 410073People’s Republic of China Earth and Planets Laboratory Carnegie Institution of Washington5251 Broad Branch Rd.NWWashingtonDC 20015USA Department of Materials Science and Engineering University of ArizonaTucsonArizona 85721USA Quantum Theory Project Department of Physics and Department of ChemistryUniversity of FloridaGainesvilleFlorida 32611USA

We consider a steady-state(but transient)situation in which a warm dense aggregate is a two-temperature system with equilibrium electrons at temperature T_(e),ions at T_(i),and T_(e)≠T_(i).Such states are achievable by pump–probe *** warm dense hydrogen in such a twotemperature situation,we investigate nuclear quantum effects(NQEs)on structure and thermodynamic properties,thereby delineating the limitations of ordinary ab initio molecular *** use path integral molecular dynamics(PIMD)simulations driven by orbital-free density functional theory(OFDFT)calculations with state-of-the-art noninteracting free-energy and exchange-correlation functionals for the explicit temperature *** calibrate the OFDFT calculations against conventional(explicit orbitals)Kohn–Sham *** find that when the ratio of the ionic thermal de Broglie wavelength to the mean interionic distance is larger than about 0.30,the ionic radial distribution function is meaningfully affected by the inclusion of ***,NQEs induce a substantial increase in both the ionic and electronic *** confirms the importance of NQEs for highly accurate equation-of-state data on highly driven *** Te>20 kK,increasing Te in the warm dense hydrogen has slight effects on the ionic radial distribution function and equation of state in the range of densities *** addition,we confirm that compared with thermostatted ring-polymer molecular dynamics,the primitive PIMD algorithm overestimates electronic pressures,a consequence of the overly localized ionic description from the primitive scheme.

关键词： orbital quantum electronic

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Design, Synthesis and Ring-Opening Properties of a New Bipyridine Fused Rhodamine-Like Chelating Ligand and the Related Transition Metal Complexes

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Chinese Journal of Chemistry 2021年第6期39卷 1659-1666页

作者： Zhiyuan Qian Yukun Cheng Shunan Zhao keith Man-Chung Wong Department of Chemistry Southern University of Science and TechnologyNo.1088Tangchang BoulevardNanshan District，ShenzhenGuangdong 518055China

A new bipyridine fused rhodamine-like chelating ligand and the corresponding transition metal complexes of platinum(Ⅱ)and iridi-um(Ⅲ)have been designed,synthesized and structurally characterized by X-ray *** photophysical properties and acid-or metal ion-promoted spirocarbon ring-opening properties have been *** platinum(Ⅱ)and iridium(Ⅲ)complexes show a drastic color change in solution with Hg^(2+) ions and emergency of an absorption band at around 450-600 nm,assignable to the absorption band of the ring-opened rhodamine-like *** platinum(Ⅱ)complex was suggested to undergo dissociation with Hg^(2+) ion,based on the corresponding absorption titration *** titration studies of iridium(Ⅲ)complexes were found to suffer from the quenching process,probably due to the presence of a lower-lying non-emissive excited state from the ring-opened form of ligand.

关键词： Rhodamine Transition metals Sensor Luminescence Bipyridine

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Modeling Structured Finance Cash Flows with Microsoft Excel: A Step-by-Step Guide

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2007年

作者： keith A. Allman

ISBN: (纸本)9780470042908;0470042907

Introduction -- Dates and timing -- Asset cash flow generation -- Prepayments -- Delinquency, default, and loss analysis -- Recoveries -- Liabilities and the cash flow waterfall -- Advanced liability structures : triggers, interest rate swaps, and reserve accounts -- Analytics and output reporting -- Understanding the model -- Automation using Visual Basic Applications (VBA) -- Conclusion.

关键词： Cash management Cash flow Corporations

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Forest composition and red oak (Quercus sp.) response to elevation gradients across greentree reservoirs

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Forest Ecosystems 2023年第5期10卷 607-617页

作者： Cassandra Hug Pradip Saud keith McKnight Douglas C.Osborne College of Forestry Agriculturaland Natural ResourcesUniversity of Arkansas at MonticelloMonticelloAR71656USA USFWS/Lower Mississippi Valley Joint Venture TylerTX75707USA Five Oaks Ag Research and Education Center HumphreyAR72073USA

Elevation gradients within forested wetlands have long been recognized for their role in defining species composition through factors such as hydrology and soil *** reservoirs(GTRs)are leveeimpounded tracts of bottomland hardwood forest flooded throughout the winter months to provide habitat for overwintering *** flooding of GTRs alters the forest composition due to flood frequency,depth,and duration in combination with slight changes in *** evaluate the effect of elevation gradients,soil properties,and management techniques in the overstory species composition and red oak(Quercus spp.)species abundance,we inventoried 662 plots across 12 independent GTRs in eastern *** the lower elevations ranging from 50.98 to 54.99 m above sea level,the importance value index(IVI)was highest for nuttall oak(Quercus texana)and overcup oak(Quercus lyrata),whereas IVI shifted to cherrybark oak(Quercus pagoda)in the higher elevations ranging from 54.99 to 58.00 *** diversity did not differ by elevation gradient,soil property,or management technique within *** diversity,using non-metric multi-dimensional scaling(NMDS)analysis,indicated site-specific variability significantly correlated with the environmental predictors,including elevation(R^(2)=0.57),easting(R^(2)=0.47),soil texture(R^(2)=0.21),and pH(R^(2)=0.12).Red oak species-specific mixed-effects modeling of abundance response using Poisson distribution suggested an inverse correlation of nuttall oak and a direct correlation of cherrybark oak abundance with ***,willow oak(Quercus phellos)abundance was not significantly affected by elevation but was by silt loam soil texture and restoration management *** findings will aid management efforts to reduce the dominance of less desirable species that are prominent under specific environmental conditions and promote the dominance of more desirable *** GTR sustainability is increas

关键词： Bottomland hardwoods Diversity Forested wetland Overstory Red oak Soil Thinning and management

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OVERVIEW OF COMPLEX SYSTEMS IN SPORT

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Journal of Systems Science & Complexity 2013年第1期26卷 4-13页

作者： BALAGUE Natàlia TORRENTS Carlota HRISTOVSKI Robert DAVIDS keith ARAUJO Duarte INEFC University of Barcelona INEFC University of Lleida Ss.Cyril and Methodius University SkopjeRepublic of Macedonia School of Human Movement Studies Queensland University of Technologies Faculty of Human Kinetics Technical University of Lisbon

The complex systems approach offers an opportunity to replace the extant pre-dominant mechanistic view on sport-related *** emphasis on the environment-system relationship,the applications of complexity principles,and the use of nonlinear dynamics mathematical tools propose a deep change in sport *** dynamics,ecological dynamics,and network approaches have been successfully applied to the study of different sport-related behaviors,from movement patterns that emerge at different scales constrained by specific sport contexts to game *** benefit from the use of such approaches in the understanding of technical,tactical,or physical conditioning aspects which change their meaning and dilute their *** creation of new learning and training strategies for teams and individual athletes is a main practical *** challenges for the future are investigating the influence of key control parameters in the nonlinear behavior of athlete-environment systems and the possible relatedness of the dynamics and constraints acting at different spatio-temporal scales in team *** sport-related phenomena can make useful contributions to a better understanding of complex systems and vice-versa.

关键词： Constraints-led approach coordination dynamics performer-environment system self- organization team dynamics.

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Strategies for Sustainable Financing of Secondary Education in Sub-Saharan Africa 1

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丛书名： Africa Human Development SeriesEdition

2008年

作者： keith M. Lewin

ISBN: (数字)9780821371169

ISBN: (纸本)9780821371152

Investment in secondary schooling in Sub-Saharan Africa has been neglected since the World Conference on Education for All at Jomtien. The World Education Forum in Dakar began to recognize the growing importance of post-primary schooling for development. Only 25 percent of school-age children attend secondary school in the regionand fewer complete successfully, having consequences for gender equity, poverty reduction, and economic growth. As universal primary schooling becomes a reality, demand for secondary schools is increasing rapidly. Gaps between the educational levels of the labor force in Sub-Saharan Africa and other regions remain large. Girls are more often excluded from secondary schools than boys. Secondary schooling costs are high to both governments and households. This book explores how access to secondary education can be increased. Radical reforms are needed in low-enrollment countries to make secondary schooling more affordable and to provide more access to the majority currently excluded. The report identifies the rationale for increasing access, reviews the status of secondary education in Sub-Saharan Africa, charts the growth needed in different countries to reach different levels of participation, identifies the financial constraints on growth, and discusses the reforms needed to make improved access affordable. The book concludes with a road map of ways forward that increase the probability that more of Africas children will experience secondary schooling.

关键词： Education, Secondary -- Economic aspects -- Africa, Sub-Saharan Education, Secondary -- Africa, Sub-Saharan -- Finance Sustainable development -- Africa, Sub-Saharan

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数据可视化,用设计“读懂”数据

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艺术与设计 2024年第3期 16-35页

作者：谭智恒九月(译) 三度(图) 不详

我们生活在一个日益复杂的世界中。我们的日常生活涉及到与数以万计的信息的交互,主要通过视觉(如果视力正常的话)以及许多不同的物理和数字渠道。其中许多信息可能对我们而言并无意义或毫不相关,但却同样要求我们关注。信息图表成为我... 详细信息

我们生活在一个日益复杂的世界中。我们的日常生活涉及到与数以万计的信息的交互,主要通过视觉(如果视力正常的话)以及许多不同的物理和数字渠道。其中许多信息可能对我们而言并无意义或毫不相关,但却同样要求我们关注。信息图表成为我们更高效地理解世界的一种捷径。信息不再仅仅是单向传播以供我们消费。

关键词：单向传播数据可视化信息图表更高效读懂日常生活

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Hereditary diffuse gastric cancer: One family's story

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World Journal of Clinical Cases 2018年第1期6卷 1-5页

作者： Haley M Zylberberg keith Sultan Steven Rubin Donald and Barbara Zucker School of Medicine at Hofstra/Northwell Division of Gastroenterology Donald and Barbara Zucker School of Medicine at Hofstra/Northwell

Hereditary diffuse gastric cancer(HDGC) is an inherited form of gastric cancer that carries a poor prognosis. Most HDGCs are caused by an autosomal dominant genetic mutation in the CDH1 gene, which carries a 70%-80% lifetime risk of gastric cancer. Given its submucosal origin, endoscopic surveillance is an unreliable means of early detection, and prophylactic gastrectomy is recommended for CDH1 positive individuals older than age 20 years. We describe the case of a male with recurrent gastric cancer who was diagnosed with HDGC secondary to the CDH1 mutation, and we also describe the patient's pedigree and outcomes of recommended genetic testing.

关键词： Hereditary diffuse gastric cancer Genetic testing Genetic diseases Gastric cancer Lobular breast cancer Inheritable diseases

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Complementary Physical and Mechanical Techniques to Characterise Tooth: A Bone-like Tissue

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Journal of Bionic Engineering 2006年第1期3卷 19-31页

作者： Peter Zioupos keith D. Rogers Centre for Photo-manipulation and Photo-analysis of Materials Cranfield University Shrivenham SN 6 8LA UK Centre for Materials Science and Engineering Cranfield University Postgraduate Medical School Shrivenham SN 6 8LA UK

Bone like tissues are biocomposites comprising an organic matrix （mostly collagen） and a reinforcement phase in the form of mineral crystals （poorly stoichiometric apatite）. The composite properties are a result of the material characteristics of the two phases, their interaction, the relative composition, the orientation and the micro-architecture of the structure. The inherent spatial heterogeneity of these tissues （a result of evolutionary and functional requirements） and their exposure to various environmental and mechanical influences result in highly variable properties on the microscale, which can only be characterised by modern microanalytical methods. We present here results obtained by the complementary use of the modem nanoindentation and micro-X-ray diffraction techniques, which were used to probe the properties and structure of human dentine and enamel of primary molar teeth. The results show that both the addition and the higher organization of mineral within the organic matrix produce stiffer and harder tissue and that the examination of properties within small tissue volumes can be reliably achieved by use of these two methods in parallel. This opens new avenues in the study of biomaterial in general, and for the local characterisation of regions of teeth that suffered bacterial attack, mechanical wear, fluoridisation, chemical bleaching, or dental treatment such as laser ablation or drilling.

关键词： biogenic composites teeth nanoindentation hardness X-ray diffraction

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