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A General Algorithm for Calculating Irreducible Brillouin Zones

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Communications in Computational Physics 2022年第2期31卷 495-515页

作者： Jeremy J.Jorgensen john E.Christensen Tyler J.Jarvis Gus l.W.Hart Department of Physics and Astronomy Brigham Young UniversityProvoUtah84602USA Department ofMathematics BrighamYoungUniversityProvoUtah84602USA

Calculations of properties of materials require performing numerical integrals over the Brillouin zone(BZ).Integration points in density functional theory codes are uniformly spread over the BZ(despite integration error being concentrated in small regions of the BZ)and preserve symmetry to improve computational *** points over an irreducible Brillouin zone(IBZ),a rotationally distinct region of the BZ,do not have to preserve crystal symmetry for greater *** freedom allows the use of adaptive meshes with higher concentrations of points at locations of large error,resulting in improved algorithmic *** have created an algorithm for constructing an IBZ of any crystal structure in 2D and *** algorithmuses convex hull and half-space representations for the BZ and IBZ to make many aspects of construction and symmetry reduction of the BZ *** algorithm is simple,general,and available as open-source software.

关键词： Brillouin zone irreducible Brillouin zone

Synthesis of liSm_(0.01)Mn_(1.99)O_4 by molten salt technique

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Journal of Rare Earths 2010年第2期28卷 255-259页

作者： M Helan l john Berchmans Department of Chemistry Jamal Mohamed College (Autonomous) Electropyrometallurgy Division Central Electrochemical Research Institute

Samarium substituted lithium manganese oxide powders were successfully prepared by molten-salt synthesis(MSS) using eutectic mixture of liCl,SmCl3.6H2O and MnO2 salt at 700 °*** synthesis was carried out in open *** crystalline powders were characterized for their phase identification using X-ray diffraction(XRD) *** physico-chemical properties of the samarium substituted lithium manganese oxide powders were investigated by thermal analysis(TGA/DTA),FT-IR spectroscopy,EDAX,electron par...

关键词： liSm0.01Mn1.99O4 molten salt synthesis cathode materials rare earth ion

Behavioral responses to spatial heterogeneity in endangered Ganges River dolphins(Platanista gangetica gangetica)

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Water Biology and Security 2022年第3期1卷 67-76页

作者： Shambhu Paudel john l.Koprowski Usha Thakuri Yukiko Sasaki-Yamamoto Shiro Kohshima School of Natural Resources and the Environment University of Arizona1064 East Lowell StreetTucsonAZ85721USA Tribhuvan University Institute of ForestryPost Box:43PokharaNepal Haub School of Environment and Natural Resources University of WyomingBim Kendall House804 E Fremont StLaramieWY82072USA Wildlife Research Center of Kyoto University 2-24 Tanaka-Sekiden-choSakyo-kuKyoto606-8203Japan

Globally,the threat of endangerment and extinction of small cetaceans was highlighted after the recent extinction of the Chinese River dolphin or Baiji(lipotes vexillifer).Species with a small population size and a limited geographic range,such as Ganges River dolphins(GRD),are more vulnerable to *** social and behavioral needs of cetaceans have been identified as potential factors increasing their vulnerability to human ***,little is known about how GRD adapt their behaviors and diel activity patterns to spatiotemporal *** this paper,we examined the underwater behavior of GRDs in Nepal by collecting echolocation clicks from three spatially stratified habitats in the Sapta Koshi River system over a six-month *** research found that GRDs behave differently in response to spatial heterogeneity,indicating diverse environmental requirements for GRD *** activity and duration varied across habitats but not across time of day,suggesting that GRD behaviors are likely to be regulated by habitat structure regardless of the time of ***,GRD consistently exhibited nocturnal activity peaks even when diurnal activity varied *** indicates that river dolphins may favor nocturnal refuges as a reaction to human disturbance in highly regulated *** human disturbances in conjunction with habitat heterogeneity can improve the persistence of riverine ***,we document behavioral and ecological information pertaining to GRD,which is essential to the formation of river dolphin recovery plans that link ecological perspectives to planning and management.

关键词： Ganges river dolphin Behavior Acoustic Ecology Nepal

Configuration-Sensitive Molecular Sensing on Doped Graphene Sheets

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Nano Research 2010年第7期3卷 472-480页

作者： john Russell Petr Král Department of Chemistry University of Illinois at ChicagoChicagoIL 60607USA

We show by molecular dynamics simulations that configuration-sensitive molecular spectroscopy can be realized on optimally doped graphene sheets vibrated by an oscillatory electric *** selectivity of the spectroscopy is achieved by maximizing Coulombic binding between the detected molecule and a specific nest,formed for this molecule on the graphene sheet by substituting selected carbon atoms with boron and nitrogen *** can detect binding of different isomers to the nest from the frequency shifts of selected vibrational modes of the combined *** an illustrative example,we simulate detection of hexanitrostilbene enantiomers in chiral nests formed on graphene.

关键词： Molecular sensing enantiomer graphene functionalization molecular dynamics

Cannabinoids function in defense against chewing herbivores in Cannabis sativa l.

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Horticulture Research 2023年第11期10卷 131-140页

作者： George M.Stack Stephen I.Snyder Jacob A.Toth Michael A.Quade Jamie l.Crawford john K.McKay john Nicholas Jackowetz Ping Wang Glenn Philippe Julie l.Hansen Virginia M.Moore Jocelyn K.C.Rose lawrence B.Smart Horticulture Section School of Integrative Plant ScienceCornell UniversityCornell AgriTechGenevaNY 14456United States Plant Biology Section School of Integrative Plant ScienceCornell UniversityIthacaNY 14853United States Plant Breeding Section School of Integrative Plant ScienceCornell UniversityIthacaNY 14853United States Department of Agricultural Biology Colorado State UniversityFort CollinsCO 80523United States Cirona labs GenevaNY 14456United States Department of Entomology Cornell UniversityCornell AgriTechGenevaNY 14456United States

In the decades since the first cannabinoids were identified by scientists,research has focused almost exclusively on the function and capacity of cannabinoids asmedicines and intoxicants for humans and other *** little is knownabout the adaptive value of cannabinoid production,though several hypotheses have been proposed including protection from ultraviolet radiation,pathogens,and *** test the prediction that genotypeswith greater concentrations of cannabinoidswill have reduced herbivory,a segregating F2 population of Cannabis sativa was leveraged to conduct lab-and field-based bioassays investigating the function of cannabinoids in mediating interactions with chewing *** the field,foliar cannabinoid concentration was inversely correlated with chewing herbivore *** detached leaves,Trichoplusia ni larvae consumed less leaf area and grew less when feeding on leaves with greater concentrations of *** electron and light microscopy were used to characterize variation in glandular trichome ***-free genotypes had trichomes that appeared *** isolate cannabinoids from confounding factors,artificial insect diet was amended with cannabinoids in a range of physiologically relevant *** grew less and had lower rates of survival as cannabinoid concentration *** results support the hypothesis that cannabinoids function in defense against chewing herbivores.

关键词： function founding ultraviolet

Familial aggregation of esophageal cancer

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Chinese Medical Journal 2023年第21期136卷 2644-2646页

作者： Shuai li john lHopper Centre for Epidemiology and Biostatistics Melbourne School of Population and Global HealthThe University of MelbourneCarltonVIC 3053Australia Centre for Cancer Genetic Epidemiology Department of Public Health and Primary CareUniversity of CambridgeCambridge CB18RNUK Precision Medicine School of Clinical Sciences at Monash HealthMonash UniversityClaytonVIC 3168Australia Murdoch Children’s Research Institute Royal Children’s HospitalParkvilleVIC 3051Australia

Esophageal cancer has a substantial health burden in China,especially in the northern *** family history has been found to be associated with esophageal cancer risk,some quantitative aspects of the association remain unclear or imprecise,including the age-specific magnitude of familial aggregation,the risks associated with the number and type of affected relatives,and how the familial risk combines with other known risk factors.

关键词： esophageal cancer aggregation

A data directory to facilitate investigations on worldwide wildlife trafficking

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Big Earth Data 2023年第2期7卷 338-348页

作者： Meredith l.Gore Rowan Hilend Jonathan OPrell Emily Griffin john R.Macdonald Burcu B.Keskin Aaron Ferber Bistra Dilkina Department of Geographical Sciences University of MarylandCollege ParkUSA Department of Supply Chain Management Michigan State UniversityEast LansingUSA Department of Information Sciences Statisticsand Management ScienceUniversity of AlabamaTuscaloosaUSA Operations and Information Management Division Babson CollegeWellesleyUSA Supply Chain Management Department of ManagementColorado State UniversityFort CollinsUSA Verterbi School of Engineering University of Southern CaliforniaLos AngelesUSA

Wildlife trafficking is a global phenomenon posing many negative impacts on socio-environmental *** exploration of wildlife trafficking trends and the impact of interventions is significantly encumbered by a suite of data reuse *** describe a novel,open-access data directory on wildlife trafficking and a corresponding visualization tool that can be used to identify data for multiple purposes,such as exploring wildlife trafficking hotspots and convergence points with other crime,discovering key drivers or deterrents of wildlife trafficking,and uncovering structural *** searches,expert elicitation,and peer-reviewed publications were used to search for extant sources used by industry and non-profit organizations,as well as those leveraged to publish academic research *** open-access data directory is designed to be a living document and searchable according to multiple *** directory can be instrumental in the data-driven analysis of unsustainable illegal wildlife trade,supply chain structure via link prediction models,the value of demand and supply reduction initiatives via multi-item knapsack problems,or trafficking behavior and transportation choices via network interdiction problems.

关键词： Illegal wildlife trade supply chain operations management interdiction conservation

Evidence‐based Gastroenterology and Hepatology, Second Edition 2nd ed

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Integration of the Coupled Orbit-Attitude Dynamics Using Modified Chebyshev-Picard Iteration Methods

2004年

作者： john WD mcdonald Andrew K Burroughs Brian G Feagan

ISBN: (数字)9780470987025

ISBN: (纸本)9780727917515

Traditional textbooks in this field have emphasized the basic sciences of pathology, biochemistry and physiology. Evidence-based Gastroenterology and Hepatology covers all the major diseases of the gastrointestinal tract and liver, utilizing clinical epidemiology to present the strongest and most current evidence for interventions. This second edition is edited and written by leading gastroenterologists from around the world, each chapter summarizes the evidence so that better informed decisions will be made about which treatments to offer to patients. It provides practising Gastroenterologists and Surgeons with clear information regarding the diagnosis and treatment of pancreatic diseases, giving clear evidence and experience-based material that is immediately relevant to clinical practice. Also contains a list of recommended reading at the end of each chapter. Take a look at up to date information at ***

关键词： Gastrointestinal Diseasestherapy.

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Computer Modeling in Engineering & Sciences 2016年第2期111卷 129-146页

作者： Xiaoli Bai john l.Junkins Rutgers The State University of New JerseyPiscatawayNJU.S.A Texas A&M College StationTXU.S.A

This paper presents Modified Chebyshev-Picard Iteration(MCPI)methods for long-term integration of the coupled orbit and attitude *** most orbit predictions for operational satellites have assumed that the attitude dynamics is decoupled from the orbit dynamics,the fully coupled dynamics is required for the solutions of uncontrolled space debris and space objects with high area-to-mass ratio,for which cross sectional area is constantly changing leading to significant change on the solar radiation pressure and atmospheric *** is a set of methods for solution of initial value problems and boundary value *** methods refine an orthogonal function approximation of long-time-interval segments of state trajectories iteratively by fusing Chebyshev polynomials with the classical Picard iteration and have been applied to multiple challenging aerospace *** the studies on integrating a torque-free rigid body rotation and a long-term integration of the coupled orbit-attitude dynamics through the effect of solar radiation pressure,MCPI methods are shown to achieve several times speedup over the Runge-Kutta 7(8)methods with several orders of magnitudes of better *** methods are further optimized by integrating the decoupled dynamics at the beginning of the iteration and coupling the full dynamics when the attitude solutions and orbit solutions are converging during the *** approach of decoupling and then coupling during iterations provides a unique and promising perspective on the way to warm start the solution process for the longterm integration of the coupled orbit-attitude ***,an attractive feature of MCPI in maintaining the unity constraint for the integration of quaternions within machine accuracy is illustrated to be very appealing.

关键词： Orbit propagation orbit-attitude dynamics Modified Chebyshev-Picard Iteration(MCPI)Methods