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The 16th Workshop on Antarctic Meteorology and Climate and 6th Year of Polar Prediction in the Southern hemisphere Meeting

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Advances in Atmospheric Sciences 2022年第3期39卷 536-542页

作者： David h.BROMWICh Matthew A.LAZZARA Arthur M.CAYETTE Jordan G.POWERS Kirstin WERNER John J.CASSANO steven R.COLWELL Scott CARPENTIER Xun ZOU Byrd Polar and Climate Research Center The Ohio State UniversityColumbusOhio 43210USA Antarctic Meteorological Research Center Space Science and Engineering CenterUniversity of Wisconsin-MadisonMadisonWisconsin 53704USA Department of Physical Sciences Madison Area Technical CollegeMadisonWisconsin 53706 USA Naval Information Warfare Center CharlestonSouth Carolina 29406USA National Center for Atmospheric Research BoulderColorado 53706USA Year of Polar Prediction(YOPP)International Coordination Office Alfred Wegener InstituteHelmholtz Centre for Polar and Marine ResearchBremerhaven 27570Germany National Snow and Ice Data Center Cooperative Institute for Research in Environmental Sciences and Department of Atmospheric and Oceanic SciencesUniversity of ColoradoBoulderColorado 80309USA British Antarctic Survey Cambridge CB30ETUnited Kingdom Bureau of Meteorology Hobart 7001Australia

1. Overview In June 2021, the 16th Workshop on Antarctic Meteorology and Climate (WAMC) and the 6th Year of Polar Prediction in the Southern hemisphere (YOPP-Sh) Meeting (http://***/WAMC;021/) were held online and hosted by the Polar Meteorology Group at Byrd Polar and Climate Research Center, The Ohio State University, Columbus,Ohio (Fig. 1).

关键词： Antarctic hemisphere Climate

Changes in Soil Composition and Floral Coverage on a Glacial Foreland Chronosequence in Southern Iceland

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Open Journal of Soil Science 2013年第4期3卷 191-198页

作者： Lawrence h.Tanner Ann E.Walker morgan Nivison David L.Smith Department of Biological Sciences Le Moyne CollegeSyracuseUSA Department of Earth&Planetary Sciences and Science Alliance Center of ExcellenceUniversity of TennesseeKnoxvilleUSA

The land surface in front of the Skaftafellsj?kull in southern Iceland, exposed by ice recession commencing about the start of the twentieth century, constitutes a foreland with a maximum age of about 100 years and a more distal outwash plain. The ages of different surfaces within this sequence are constrained by moraines of known or estimated ages. Across this chronosequence, we measured at various sites the extent of floral coverage of the surface, the soil carbon and nitrogen contents of the substrate and the soil CO2 flux rate. All measured parameters exhibit values increasing with distance from the ice front, which correlates approximately with age. The strongest correlations are seen between distance and the carbon and nitrogen concentrations of the soil. Marked horizonation of the soil is observed only on the oldest surfaces (100+ years).

关键词： Skaftafellsjokull Glacial Foreland Chronosequence Soil Carbon Soil CO_(2) Flux

腰椎骨盆固定和三角固定术在不稳定型骶骨骨折治疗中的应用

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中华创伤骨科杂志 2011年第4期13卷 371-374页

作者：易成腊 steven morgan David J hak 华中科技大学同济医学院附属同济医院创伤外科武汉430030 科罗拉多大学医学院丹佛医学中心骨科

骶骨是构成骨盆后环的蕈要结构和脊柱重力线分佑到两侧髋臼的枢纽部位，垂直不稳定型骶骨骨折多由高能量损伤引起，常合并神经损伤和多发性创伤而引起骨盆环不稳定，特殊类型的骶骨骨折可引起脊柱一骨盆的不稳定。近年来，随着研究的深... 详细信息

骶骨是构成骨盆后环的蕈要结构和脊柱重力线分佑到两侧髋臼的枢纽部位，垂直不稳定型骶骨骨折多由高能量损伤引起，常合并神经损伤和多发性创伤而引起骨盆环不稳定，特殊类型的骶骨骨折可引起脊柱一骨盆的不稳定。近年来，随着研究的深入，多种内固定方法用于垂直不稳定型骶骨骨折的治疗，包括横向固定装置，如骶髂螺钉、骶骨棒、

关键词：骶骨骨折不稳定型骨盆固定治疗固定术应用三角腰椎

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骨科关键技术

Vortex Shedding Lock-in on Tapered Poles with Polygonal Cross-Section

2004年

作者：（美）steven h.Stern 温建民主译

本书涵盖了常见骨科手术的基本操作、基本理论等方面。每章均回顾了一种不同的术式，内容包括手术适应证、手术禁忌证、技术要点、手术注意事项等。

ISBN: (纸本)7506729296

关键词：医药、卫生

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Open Journal of Fluid Dynamics 2022年第2期12卷 127-153页

作者： Jaime A. Ocampo steven h. Collicott Robert J. Connor School of Aeronautics and Astronautics Purdue University West Lafayette USA Lyles School of Civil Engineering Purdue University West Lafayette USA

A study to investigate the effects of taper on vortex shedding coherence on high Mast Lighting Towers (hMLT) with models of eight-, twelve-, and sixteen-sided polygonal cross-section was performed in Purdue’s Boeing Low-Speed Wind Tunnel. Partial tower models were mounted on springs to recreate a flutter phenomenon seen on high mast lighting towers and data was taken using a stationary configuration within the wind tunnel. The model was later oscillated at specified frequencies and amplitudes and the resulting wake and surface pressures were recorded and compared to the stationary cases. The researchers aim to study the characteristics of a “lock-in” phenomenon, that is, a region of pole height where there is a vortex cell with a single shedding frequency, instead of different shedding frequencies for different diameters as Strouhal theory dictates. Results show the existence of vortex cell shedding for clamped models. Using a motor and a forcing cam to recreate the elastic movement of the hMLT in ambient conditions has yielded a specific range of diameters to determine the size of the locked in vortex cells. According to standard Department of Transportation manufacturing standards for tapered hMLT, the lock in distance for small excitations (0.254 cm) would be approximately 305 cm in tower height.

关键词： Vortex Shedding Lock-In Tower Aerodynamics

北京市大气PM_(2.5)中矿物成分的污染特征

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环境科学 2004年第5期25卷 26-30页

作者：杨复沫贺克斌马永亮 steven h.Cadle Tai Chan Patricia A.Mulawa 清华大学环境科学与工程系北京100084 GM Research&Development Center

为了解北京市大气细粒子中矿物成分的浓度水平和污染特征 ,在清华园和车公庄进行了连续 1a的PM2 5累积周采样和全样品分析 .Al、Si、Ca、Mg和Fe等地壳元素的周变化相似 ,最大周均浓度均出现在春季有强沙尘天气的一周 ;其季节变化显著 ... 详细信息

为了解北京市大气细粒子中矿物成分的浓度水平和污染特征 ,在清华园和车公庄进行了连续 1a的PM2 5累积周采样和全样品分析 .Al、Si、Ca、Mg和Fe等地壳元素的周变化相似 ,最大周均浓度均出现在春季有强沙尘天气的一周 ;其季节变化显著 ,显示季节性的源排放以及气象条件对矿物成分的含量影响显著 .土壤尘的季节平均浓度从夏季逐步上升 ,至次年春季达到最高 (2 1 1 μg·m-3 ) ,表明春季频繁发生的沙尘天气对土壤尘细粒子有重要贡献 .大量的建筑活动可能大大增加了北京细粒子中Ca的负荷。

关键词：矿物成分地壳元素土壤尘 PM2.5 污染特征北京

Epigenetic profiles of pre-diabetes transitioning to type 2 diabetes and nephropathy

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World Journal of Diabetes 2015年第9期6卷 1113-1121页

作者： Thomas A Vander Jagt Monica h Neugebauer Marilee morgan Donald W Bowden Vallabh O Shah Department of Biochemistry and Molecular Biology University of New Mexico School of Medicine MIND Institute Center for Diabetes Research Wake Forest School of Medicine

AIM: To examine DNA methylation profiles in a longitudinal comparison of pre-diabetes mellitus(Pre-DM) subjects who transitioned to type 2 diabetes mellitus(T2DM).METhODS: We performed DNA methylation study in bisulphite converted DNA from Pre-DM(n = 11) at baseline and at their transition to T2 DM using Illumina Infinium human Methylation27 Bead Chip, that enables the query of 27578 individual cytosines at Cp G loci throughout the genome, which are focused on the promoter regions of 14495 ***: There were 694 Cp G sites hypomethylated and 174 Cp G sites hypermethylated in progression from Pre-DM to T2 DM, representing putative genes involved in glucose and fructose metabolism, inflammation, oxidative and mitochondrial stress, and fatty acid metabolism. These results suggest that this high throughput platform is able to identify hundreds of prospective Cp G sites associated with diverse genes that may reflect differences in Pre-DM compared with T2 DM. In addition, there were Cp G hypomethylation changes associated with a number of genes that may be associated with development of complications of diabetes, such as nephropathy. These hypomethylation changes were observed in all of the ***: These data suggest that some epigenomic changes that may be involved in the progression of diabetes and/or the development of complications may be apparent at the Pre-DM state or during the transition to diabetes. hypomethylation of a number of genes related to kidney function may be an early marker for developing diabetic nephropathy.

关键词： Epigenetic changes Pre-diabetes Diabetes Nephropathy

Phylogenomic analysis of 2556 single-copy protein-coding genes resolves most evolutionary relationships for the major clades in the most diverse group of lichen-forming fungi

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Fungal Diversity 2018年第5期92卷 31-41页

作者： David Pizarro Pradeep K.Divakar Felix Grewe steven D.Leavitt Jen-Pan huang Francesco Dal Grande Imke Schmitt Mats Wedin Ana Crespo h.Thorsten Lumbsch Departamento de Farmacologı́a Farmacognosia y BotánicaFacultad de FarmaciaUniversidad Complutense de Madrid28040 MadridSpain Science&Education The Field Museum1400 S.Lake Shore DriveChicagoILUSA Department of Biology and M.L.Bean Life Science Museum Brigham Young UniversityLife Science Building 4102ProvoUT 84602USA Senckenberg Biodiversity and Climate Research Centre(SBiK-F) Senckenberganlage 2560325 Frankfurt am MainGermany Institute of Ecology Evolution and DiversityGoethe UniversityFrankfurt am MainMax-von-Laue-Str.960438 Frankfurt am MainGermany Department of Botany Swedish Museum of Natural HistoryPO Box 5000710405 StockholmSweden

Phylogenomic datasets continue to enhance our understanding of evolutionary relationships in many lineages of ***,genome-scale data have not been widely implemented in reconstructing relationships in lichenized *** we generate a data set comprised of 2556 single-copy protein-coding genes to reconstruct previously unresolved rela-tionships in the most diverse family of lichen-forming fungi,*** sampling included 51 taxa,mainly from the subfamily Parmelioideae,and represented six of the seven previously identified major clades within the *** results provided strong support for the monophyly of each of these major clades and most backbone relationships in the topology were recovered with high nodal support based on concatenated dataset and species tree *** alectorioid clade was strongly supported as sister-group to all remaining clades,which were divided into two major *** the first major clade the anzioid and usneoid clades formed a strongly supported sister-group relationship with the cetrarioid?hypogymnioid *** sister-group relationship of Evernia with the cetrarioid clade was also strongly supported,whereas that between the anzioid and usneoid clades needs further *** the second major clade Oropogon and Platismatia were sister to the parmelioid group,while the position of Omphalora was not fully *** study demonstrates the power of genome-scale data sets to resolve long-standing,ambiguous phylogenetic rela-tionships of lichen-forming ***,the topology inferred in this study will provide a valuable framework for better understanding diversification in the most diverse lineage of lichen-forming fungi,Parmeliaceae.

关键词： Fungi Lecanorales Lichenized fungi Parmeliaceae Parmelioideae Phylogeny Systematics

The 13th and 14th Workshops on Antarctic Meteorology and Climate

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Advances in Atmospheric Sciences 2020年第5期37卷 423-430页

作者： Matthew A.LAZZARA Sophie A.ORENDORF Taylor P.NORTON Jordan G.POWERS David h.BROMWICh Scott CARPENTIER John J.CASSANO steven R.COLWELL Arthur M.CAYETTE Kirstin WERNER Antarctic Meteorological Research Center Space Science and Engineering CenterUniversity of Wisconsin-MadisonMadisonWI 53706USA Department of Physical Sciences School of Arts and SciencesMadison Area Technical CollegeMadison WI 53704USA Department of Atmospheric Sciences University of Wisconsin-MadisonMadisonWI 53706USA National Center for Atmospheric Research Boulder CO 53706USA Polar Meteorology Group Byrd Polar&Climate Research CenterThe Ohio State UniversityColumbus OH 43210USA Bureau of Meteorology HobartTasmania 7001Australia Cooperative Institute for Research in Environmental Sciences and Department of Atmospheric and Oceanic Sciences University of ColoradoBoulderCO 80309USA British Antarctic Survey Cambridge CB30ETUnited Kingdom Naval Information Warfare Center CharlestonSC 29406USA Year of Polar Prediction(YOPP)International Coordination Office Alfred Wegener InstituteHelmholtz Centre for Polar and Marine ResearchBremerhaven 27570Germany

*** In July 2018,the Antarctic community came together to meet at the 13th Workshop on Antarctic Meteorology and Climate(WAMC)in Madison,Wisconsin,USA(Fig.1);and in the following year in June 2019,the 14th WAMC was held in Charleston,South Carolina,USA(Fig.2).With a growing history,the WAMC addresses the topics of Antarctic meteorology and climate(Kameda et al.,2008;Colwell et al.,2016;Lazzara et al.,2018)as well as weather-related issues of scientific and operational *** workshops bring together researchers,operational forecasters,numerical modelers,observational specialists,and *** themes of both workshops included Antarctic meteorological observations,Antarctic atmospheric numerical modeling,Antarctic meteorological and climate research,and Antarctic weather forecasting and operational *** 2018 and 2019 WAMC were both followed by a one-day focus on the Year of Polar Prediction-Southern hemisphere(YOPP-Sh),when preparations and follow-up discussions were made with regard to the YOPP Special Observing Period from 16 November 2018 to 15 February 2019.

关键词： Antarctic weather meteorological