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Temporal variability of problem drinking on Twitter

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Open Journal of Preventive Medicine 2012年第1期2卷 43-48页

作者： Joshua Heber West Parley Cougar Hall Carl Lee Hanson Kyle Prier Christophe Giraud-Carrier e. Shannon Neeley Michael dean Barnes Department of Health Science Brigham Young University Provo USA

Twitter is a micro-blogging application, which is commonly used as a way for individuals to maintain social connections. Social scientists have also begun using Twitter as a data source for understanding more about human interactions. There is very little research about Twitter’s utility for monitoring health related attitudes, beliefs and behaviors. The purpose of this study was to examine the extent to which individuals tweeted about problem drinking, and to identify if such tweets corresponded with time periods when problem drinking was likely to occur. Data from this study came from tweets originating in one of 9 randomly selected states, one from each of the nine census geographies in the US. Twitter’s API was used to collect tweets during the month of October 2010, and again during the time period surrounding New Year’s eve 2010. Keywords were selected which indicated problem-drinking behaviors, and tweets were coded for the presence or absence of these keywords. Twitter users were most likely to tweet about problem drinking on Friday, Saturday and Sunday during the hours from 10 pm to 2 am. Tweets originating during the New Year’s eve holiday (0.53%) were twice as common when compared to tweets during weekends in the month of October (0.34%). Twitter may be a valid data source for social scientists, given that tweets about problem drinking corresponded with expected time periods of actual problem drinking. Furthermore, tweets that mention problem drinking may be problematic for public health if they establish incorrect normative beliefs that such behaviors are acceptable and expected. Social norms interventions may be an effective tool in correcting misperceptions related to problem drinking by informing Twitter followers that problem drinking behaveiors are not normative.

关键词： Twitter Problem Drinking Temporal Variance

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耕作工具的组合对牵引力的影响

水土保持科技情报 1989年第4期7卷 8-11页

作者： dean e.evas 项玉章

耕作工具方位及组合形式对系统牵引力有何影响及对中间工具牵引力又有何影响呢?为了有助于解决这个问题,我们对两种土壤类型在相同深度情况下进行了九种几何组合的试验。

关键词：耕作工具组合牵引力

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工作部件的配置方式对牵引阻力的影响

粮油加工(电子版) 1986年第7期 6-10页

作者： dean e·evans ,姚延斌

怎样配置耕作机械的相邻工作部件会直接影响所有工作部件的总牵引阻力,一个工作部件配置在其他两个工作部件之间对牵引阻力有何影响?为了回答这个问题,在两种土壤上,以耕深为函数,用9个几何参数相结合进行了试验。机具和设备耕作试验是... 详细信息

怎样配置耕作机械的相邻工作部件会直接影响所有工作部件的总牵引阻力,一个工作部件配置在其他两个工作部件之间对牵引阻力有何影响?为了回答这个问题,在两种土壤上,以耕深为函数,用9个几何参数相结合进行了试验。机具和设备耕作试验是在亚拉巴马州的国家耕作机械试验室的土槽中进行的。试验中使用

关键词：牵引阻力配置部件深宽比

高强钢Q960e对接接头残余应力与焊接变形的数值模拟

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中国机械工程 2023年第17期34卷 2095-2105,2141页

作者：骆文泽成慧梅刘红艳王义峰叶延洪邓德安重庆大学材料科学与工程学院重庆400045 河钢集团邯钢公司邯郸056015

利用等强匹配焊丝和混合气体保护焊方法制备了Q960e低合金高强钢的多层多道对焊接头。采用实验法测量了焊接温度循环、焊接变形以及焊接残余应力,同时观察了焊接接头的微观组织,并测量了硬度分布。基于焊接接头的组织特征,以SYSWeLD软... 详细信息

利用等强匹配焊丝和混合气体保护焊方法制备了Q960e低合金高强钢的多层多道对焊接头。采用实验法测量了焊接温度循环、焊接变形以及焊接残余应力,同时观察了焊接接头的微观组织,并测量了硬度分布。基于焊接接头的组织特征,以SYSWeLD软件为平台,开发了考虑“热-组织-应力”多物理场耦合的热-弹-塑性有限元计算方法。重点考虑了热影响区的固态相变材料模型,采用JMAK方程描述加热阶段的奥氏体化过程,采用K-M关系模拟冷却阶段的马氏体相变过程,同时基于Leblond模型考虑了冷却过程中的相变诱导塑性。数值模拟结果与实验测量结果的对比表明,有限元模型得到的残余应力分布和焊接变形与实测数据吻合较好,同时数值模拟结果还证明了固态相变对Q960e钢对接接头热影响区的残余应力分布与大小均有显著的影响。

关键词： Q960e钢焊接变形残余应力固态相变数值模拟

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学校心理健康教育的主要模式及特点

上海体育学院学报 2004年第3期28卷 71-73页

作者：漆昌柱武汉体育学院教务处湖北武汉430079

学校心理健康教育的主要模式有课程模式、治疗模式和生态模式。心理训练与课程模式有机结合,强调心理健康教育应秉持"心理建设优于心理预防"的原则,经过系统的训练,使学生掌握心理调控技能,提高心理承受力。

关键词：学校心理健康教育模式心理调控心理承受力

Statistics for business 英文版

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New frontiers for the materials genome initiative

丛书名：华章统计学原版精品系列

2011年

作者： (美) Robert A. Stine, dean P. Foster

本书从实际的商业问题出发, 阐述如何利用数据进行信息决策, 并将统计概念与实际问题联系起来, 告诉读者如何寻找模式从数据建立统计模型, 以及如何提供调查结果。

ISBN: (数字)9787111342007

ISBN: (纸本)9787111342007

关键词： Commercial statistics.

来源：畅想之星图书光盘版（南... 评论

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npj Computational Materials 2019年第1期4卷 776-798页

作者： Juan J.de Pablo Nicholas e.Jackson Michael A.Webb Long-Qing Chen Joel e.Moore Dane Morgan Ryan Jacobs Tresa Pollock Darrell G.Schlom eric S.Toberer James Analytis Ismaila Dabo dean M.DeLongchamp Gregory A.Fiete Gregory M.Grason Geoffroy Hautier Yifei Mo Krishna Rajan evan J.Reed efrain Rodriguez Vladan Stevanovic Jin Suntivich Katsuyo Thornton Ji-Cheng Zhao Institute for Molecular engineering University of ChicagoChicagoIL 60615USA Department of Materials Science and engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Physics University of CaliforniaBerkeleyBerkeleyCA 94720USA Department of Materials Science and engineering University of Wisconsin-MadisonMadisonWI 53706USA Materials Department and Materials Research Laboratory University of CaliforniaSanta BarbaraCA 93106USA Department of Materials Science and engineering Cornell UniversityIthacaNY 14853USA Department of Physics Colorado School of MinesGoldenCO 80401USA Materials Measurement Laboratory National Institute of Standards and TechnologyGaithersburgMD 20899USA Department of Physics University of Texas at AustinAustinTX 78712USA Department of Polymer Science and engineering University of MassachusettsAmherstMA 01003USA Institute of Condensed Matter and Nanosciences UniversitéCatholique de Louvain1348 Louvain-la-NeuveBelgium Department of Materials Science and engineering University of MarylandCollege ParkMD 20742USA Department of Materials Design and Innovation University of Buffalo–The State University of New YorkBuffaloNY 14260-5030USA Department of Materials Science and engineering Stanford UniversityStanfordCA 94305USA Department of Chemistry and Biochemistry University of MarylandCollege ParkMD 20742USA Department of Metallurgical and Materials engineering Colorado School of MinesGoldenCO 80401USA Department of Materials Science and engineering University of MichiganAnn ArborMI 48109USA Department of Materials Science and engineering The Ohio State UniversityColumbusOH 43210USA

The Materials Genome Initiative(MGI)advanced a new paradigm for materials discovery and design,namely that the pace of new materials deployment could be accelerated through complementary efforts in theory,computation,and *** with numerous successes,new challenges are inviting researchers to refocus the efforts and approaches that were originally inspired by the *** May 2017,the National Science Foundation sponsored the workshop“Advancing and Accelerating Materials Innovation Through the Synergistic Interaction among Computation,experiment,and Theory:Opening New Frontiers”to review accomplishments that emerged from investments in science and infrastructure under the MGI,identify scientific opportunities in this new environment,examine how to effectively utilize new materials innovation infrastructure,and discuss challenges in achieving accelerated materials research through the seamless integration of experiment,computation,and *** article summarizes key findings from the workshop and provides perspectives that aim to guide the direction of future materials research and its translation into societal impacts.

关键词： utilize frontier accomplishment

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高速钢的挤压

锻压技术 1981年第6期 49-54+48页

作者： T.A.dean C.e.N.STURGeSS 赵旭

试验以不同的缩减率对二种高速钢关于温度和变形速度对挤压力的影响进行了测定。流动应力和摩擦的影响是分开进行的,并将试验的挤压力与理论值进行了对比。产品检验表明,在一定的速度和温度的综合影响下可能发生开裂,指出最佳挤压条件... 详细信息

试验以不同的缩减率对二种高速钢关于温度和变形速度对挤压力的影响进行了测定。流动应力和摩擦的影响是分开进行的,并将试验的挤压力与理论值进行了对比。产品检验表明,在一定的速度和温度的综合影响下可能发生开裂,指出最佳挤压条件是高的变形速度和800℃左右的加热温度。

关键词：挤压力理论值高速工具钢刃具钢高速钢流动应力

Medium-chain fatty acids and monoglycerides as feed additives for pig production:towards gut health improvement and feed pathogen mitigation

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Journal of Animal Science and Biotechnology 2020年第3期11卷 611-625页

作者： Joshua A.Jackman Rdean Boyd Charles C.elrod School of Chemical engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea Hanor Company FranklinKY 42134USA North Carolina State University RaleighNC 27695USA Natural Biologics Inc. NewfieldNY 14867USA Department of Animal Science Cornell UniversityIthacaNY 14853USA.

Ongoing challenges in the swine industry,such as reduced access to antibiotics and virus outbreaks(e.g.,porcine epidemic diarrhea virus,African swine fever virus),have prompted calls for innovative feed additives to support pig ***-chain fatty acids(MCFAs)and monoglycerides have emerged as a potential option due to key molecular features and versatile functions,including inhibitory activity against viral and bacterial *** this review,we summarize recent studies examining the potential of MCFAs and monoglycerides as feed additives to improve pig gut health and to mitigate feed *** molecular properties and biological functions of MCFAs and monoglycerides are first introduced along with an overview of intervention needs at different stages of pig *** latest progress in testing MCFAs and monoglycerides as feed additives in pig diets is then presented,and their effects on a wide range of production issues,such as growth performance,pathogenic infections,and gut health,are *** utilization of MCFAs and monoglycerides together with other feed additives such as organic acids and probiotics is also described,along with advances in molecular encapsulation and delivery ***,we discuss how MCFAs and monoglycerides demonstrate potential for feed pathogen mitigation to curb disease *** forward,we envision that MCFAs and monoglycerides may become an important class of feed additives in pig production for gut health improvement and feed pathogen mitigation.

关键词： Antibiotics Feed pathogen mitigation Growth promotion Gut health Immune enhancement MCFA Medium-chain fatty acids Monoglycerides