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Bridge pier failure probabilities under combined hazard effects of scour, truck and earthquake. Part Ⅰ: occurrence probabilities

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Earthquake Engineering and Engineering Vibration 2013年第2期12卷 229-240页

作者： Zach Liang george C. Lee Department of Mechanical and Aerospace Engineering Unidersity at Buffalo Depart of Civil Structural and Environmental EngineeringUniversity at Buffalo

In many regions of the world, a bridge will experience multiple extreme hazards during its expected service life. The current American Association of State Highway and Transportation Officials （AASHTO） load and resistance factor design （LRFD） specifications are formulated based on failure probabilities, which are fully calibrated for dead load and nonextreme live loads. Design against earthquake loads is established separately. Design against scour effect is also formulated separately by using the concept of capacity reduction （or increased scour depth）. Furthermore, scour effect cannot be linked directly to an LRFD limit state equation, because the latter is formulated using force-based analysis. This paper （in two parts） presents a probability-based procedure to estimate the combined hazard effects on bridges due to truck, earthquake and scour, by treating the effect of scour as an equivalent load effect so that it can be included in reliability-based bridge failure calculations. In Part I of this series, the general principle of treating the scour depth as an equivalent load effect is presented. The individual and combined partial failure probabilities due to truck, earthquake and scour effects are described. To explain the method of including non-force-based natural hazards effects, two types of common scour failures are considered. In Part 11, the corresponding bridge failure probability, the occurrence of scour as well as simultaneously having both truck load and equivalent scour load are quantitatively discussed.

关键词： multi-hazards load and resistance factor design bridge scour

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SARS-CoV-2 induced liver injury:Incidence,risk factors,impact on COVID-19 severity and prognosis in different population groups

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World Journal of Gastroenterology 2023年第16期29卷 2397-2432页

作者： george D Liatsos Department of Internal Medicine Hippokration General HospitalAthens 11527AttikiGreece

Liver is unlikely the key organ driving mortality in coronavirus disease 2019(COVID-19)however,liver function tests(LFTs)abnormalities are widely observed mostly in moderate and severe *** to this review,the overall prevalence of abnormal LFTs in COVID-19 patients ranges from 2.5%to 96.8%*** geographical variability in the prevalence of underlying diseases is the determinant for the observed discrepancies between East and *** mechanisms are implicated in COVID-19-induced liver *** them,hypercytokinemia with“bystander hepatitis”,cytokine storm syndrome with subsequent oxidative stress and endotheliopathy,hypercoagulable state and immuno-thromboinflammation are the most determinant mechanisms leading to tissue *** hypoxia may also contribute under specific conditions,while direct hepatocyte injury is an emerging *** for initially observed severe acute respiratory distress syndrome corona virus-2(SARS-CoV-2)tropism for cholangiocytes,more recent cumulative data show SARS-CoV-2 virions within hepatocytes and sinusoidal endothelial cells using electron microscopy(EM).The best evidence for hepatocellular invasion by the virus is the identification of replicating SARS-CoV-2 RNA,S protein RNA and viral nucleocapsid protein within hepatocytes using in-situ hybridization and immunostaining with observed intrahepatic presence of SARS-CoV-2 by EM and by in-situ *** data mostly derived from imaging findings indicate possible long-term sequelae for the liver months after recovery,suggesting a post-COVID-19 persistent live injury.

关键词： COVID-19 SARS-CoV-2 Liver injury Cytokine storm Endotheliopathy Immuno-thromboinflammation Direct hepatocyte injury

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Optical RAM and integrated optical memories:a survey

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Light(Science & Applications) 2020年第1期9卷 1117-1132页

作者： Theoni Alexoudi george Theodore Kanellos Nikos Pleros Department of Informatics Aristotle University of ThessalonikiThessalonikiGreece Department of Electrical&Electronic Engineering University of BristolBristolUK

The remarkable achievements in the area of integrated optical memories and optical random access memories(RAMs)together with the rapid adoption of optical interconnects in the Datacom and Computercom industries introduce a new perspective for information storage directly in the optical domain,enabling fast access times,increased bandwidth and transparent cooperation with optical interconnect *** article reviews state-of-the-art integrated optical memory technologies and optical RAM cell demonstrations describing the physical mechanisms of several key devices along with their performance metrics in terms of their energy,speed and *** applications are outlined,concluding with the scaling challenges to be addressed toward allowing light to serve as both a datacarrying and data-storage medium.

关键词： RAM transparent scaling

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Physical activity and its relationship with COVID-19 cases and deaths:Analysis of ***

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Journal of Sport and Health Science 2021年第5期10卷 570-576页

作者： george B.Cunningham Center for Sport Management Research and Education Department of Health and KinesiologyTexas A&M UniversityCollege StationTX 77843USA

Purpose:The study was to examine county-level associations of physical activity with coronavirus disease 2019(COVID-19)cases and deaths,per 100,000 county ***:Data were collected from publicly available data sources for 3142 counties and equivalents,including the District of *** health ratings,percentage uninsured,percentage unemployed,median household income,percentage female residents,percentage White residents,percentage of residents 65 years of age or older,and rural designation served as ***:The two-level random intercept regression showed that physical activity rates at the county level were statistically and negatively associated with COVID-19 cases and *** analyses showed that physical activity rates moderated the relationship between cases and deaths,such that the relationship was strongest when physical activity rates were ***:The results presented here offer empirical evidence of the benefits of county-level physical activity during a *** for public health and physical activity provision are discussed.

关键词： Coronavirus disease 2019 Deaths PA

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On the character of certain tilting modules

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Science China Mathematics 2018年第2期61卷 295-298页

作者： george Lusztig Geordie Williamson Department of Mathematics Massachusetts Institute of Technology Cambridge MA 02139-4307 USA Max Planck Institut fur Mathematik Bonn 53111 Germany

Let G be a semisimple group over an algebraically closed field of characteristic p > 0. We give a(partly conjectural) closed formula for the character of many indecomposable tilting rational G-modules assuming that p ... 详细信息

关键词： semisimple group tilting module character formula

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Yolk-sac larval development of the substrate-brooding cichlid Archocentrus nigrofasciatus in relation to temperature

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Integrative Zoology 2015年第5期10卷 497-504页

作者： Nikolaos VLAHOS Michael VASILOPOULOS Eleni MENTE george HOTOS george KATSELIS Kosmas VIDALIS Department of Aquaculture and Fisheries Technological Educational Institution of Western GreeceMesollonghiGreece Department of Ichthyology and Aquatic Environment School of Agricultural SciencesUniversity of ThessalyVolosGreece

In order to conserve and culture the cichlid fish Archocentrus nigrofasciatus,more information about its reproductive biology and its larval behavior and morphogenesis is ***,temperatures ranging from 21 to 27°C are used in ornamental aquaculture *** temperatures are preferred to reduce the costs of water heating,and 23°C is usually the selected ***,there is limited information on culturing protocols for ornamental species and most of the information generated on this topic remains ***,the present study examines the morphological development of Archocentrus nigrofasciatus during the yolk-sac period up to the age of 100 h post-hatching in relation to 2 temperature regimes used in ornamental aquaculture:a temperature of 27°C(thermal optimum)and a decreased temperature of 23°C(thermal tolerance).The results of this study suggest that the 27°C temperature generates intense morphological changes in yolk-sac development in a shorter *** has advantages as it reduces the time of yolk-sac larval development,and,thus,minimizes the transition phase to exogenous feeding and maximizes the efficiency at which yolk is converted into body *** present paper provides necessary information to produce freshwater ornamental fish with better practices so as to increase larval survival and capitalize on time for growth.

关键词： Archocentrus nigrofasciatus convict cichlid growth yolk-sac development temperature

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Variation in soil organic matter accumulation and metabolic activity along an elevation gradient in the Santa Rosa Mountains of Southern California, USA

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Journal of Arid Land 2015年第6期7卷 814-819页

作者： Amitava CHATTERJEE george D JENERETTE Department of Soil Science North Dakota State University Department of Botany and Plant Sciences University of California

Variations in soil organic matter accumulation across an elevation can be used to explain the control of substrate supply and variability on soil metabolic activity. We investigated geographic changes in soil organic matter and metabolic rates along an elevation gradient（289–2,489 m） in the Santa Rosa Mountains, California, USA from subalpine and montane pine forests through chaparral to desert. From base（289 m） to summit（2,489 m）, 24 sites were established for collecting soil samples under canopies and inter-canopy spaces, at 0–5 and 5–15 cm soil depths increments. Soil organic matter（SOM） content was determined using weight loss on ignition at 550°C and soil CO2 efflux（R） was measured at day 5（R5） and day 20（R20） of incubation. Changes in SOM content along the elevation gradient showed a significant relationship（P〈0.05） but R5 and R20 were not related to either elevation or SOM content. However, the ratio of R and SOM（R5/SOM） showed a strong relationship across the mountains at both soil depths. R5/SOM, as an indicator of carbon use efficiency, may be applicable to other semi-arid transects at larger scale modeling of soil metabolic processes.

关键词： elevation gradient soil organic matter CO2 efflux metabolic activity

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Asymptotic Properties of a Modified Semi-Parametric MLE in Linear Regression with Right-Censored Data

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Acta Mathematica Sinica,English Series 2002年第2期18卷 405-416页

作者： WONG george Y.C. Strang Cancer Prevention Center.428 E 72nd Street.New York.NY 10021.USA

Consider a linear regression model Y=β'X+*** Y may be right censored and the cdf F+o of e is *** show that a modified semi-parametric *** by .is strongly consistent under certain regularity *** F_o is discontinuous,then P(≠βi.o.)=0, which means that P(=βif the sample size is large)=*** latter property has not been reported for the existing *** contrast,most estimators,such as the Buckley-James estimator and M-estimators .satisfy that P(≠βi.o.)=1.

关键词： Consistency Super-efficiency Semi-parametric MLE

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Effect of colloid-size copper-based pesticides and wood-preservatives against microbial activities of Gram-positive Bacillus species using five-day biochemical oxygen demand test

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Journal of Environmental Sciences 2021年第7期33卷 71-80页

作者： Ayenachew Tegenaw george ASorial Endalkachew Sahle-Demessie Department of Chemical and Environmental Engineering College of Engineering and Applied Science701 Engineering Research CenterUniversity of CincinnatiCincinnatiOH 45221-0012USA U.S.Environmental Protection Agency Office of Research and DevelopmentCenter for Environmental Solution and Emergency ResponseCincinnatiOH 45268USA

Copper-based pesticides and wood preservatives could end up in the environment during production,use,and end-of-life via different pathways that could cause unintended ecolog-ical and adverse health *** paper provides the effect of colloid-size Cu-based pesti-cides(CuPRO and Kocide),micronized Cu azole(MCA-1 and MCA-2)and alkaline Cu quater-nary(ACQ)treated woods,Cu^(2+),Cu^(2+) spiked untreated wood(UTW),and CuCO_(3) solutions against Gram-positive Bacillus species using five-day biochemical oxygen demand(BOD 5)stan-dard *** total Cu leached from MCA-1,MCA-2,and ACQ in Milli-Q water after 5 days were -0.1,-0.11,and -0.64 g/kg of wood,***,the form of Cu leached from MCA woods was mostly ionic(>90%).The total organic carbon(TOC)content of any tested wood(UTW/MCA-1/MCA-2/ACQ)was -99%of its corresponding total carbon(TC)content,whereas the TOC of any tested wood sawdust exceeded that of its corresponding piece/block by>300%.The dissolved oxygen(DO)consumption value in the presence of Cu^(2+),CuCO_(3),CuPRO,and Kocide solutions was significantly influenced by Cu particles/***,the DO consumption value in the presence of UTW/MCA-1/MCA-2/ACQ woods was significantly influenced by organics leached from *** the other hand,the DO consumption of MCA sawdust was greater than(300%)that of MCA pieces/*** findings of this study provide more insight into how organics leached from woods significantly reduce the toxic effects of Cu ions against Gram-positive Bacillus species.

关键词： Gram-positive Bacillus species BOD_(5) Colloid-size Cu-based pesticides DO consumption Leaching Wood preservatives

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Evidence for further charmonium vector resonances

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Chinese Physics C 2011年第4期35卷 319-324页

作者： Eef van Beveren george Rupp Centro de Física Computacional Departamento de Física Universidade de Coimbra Centro de Física das Interaccoes Fundamentais Instituto Superior Tèecnico Universidade Tèecnica de Lisboa Edifício Ciêencia

We discuss the shape of threshold signals in production cross sections of the reaction e＋e- → D＊ Dˉ＊, at the opening of the Ds＊ Dˉs＊ and Λc＋ Λ＋c channels. Furthermore, evidence for the ψ（3D）, ψ（5S）, ψ（4D）, ψ（6S）, ψ（5D）, ψ（7S）, ψ（6D）, and ψ（8S） new charmonium vector resonances is presented, on the basis of data recently published by the BABAR Collaboration. Central masses and resonance widths are estimated. Confirmation of these resonances would be a huge step in lifting the precision level of hadron spectroscopy towards that of atomic spectroscopy, with far-reaching consequences for theory.

关键词： heavy quarkonia hadron production in electron-positron annihilation

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