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领先NASA一群大学生启动月球车计划

商业周刊（中文版） 2023年第5期 28-29页

作者： katrina manson 杜然(译) 不详

美国是第一个也是唯一一个将人类送上月球的国家,但在将机器人送上月球的国际竞争中,美国航空航天局(NASA)却显然缺席了。苏联在20世纪70年代首次将机器人探测车送上月球;印度在2019年尝试过一次,但以失败告终。目前唯一还在运行的,是... 详细信息

美国是第一个也是唯一一个将人类送上月球的国家,但在将机器人送上月球的国际竞争中,美国航空航天局(NASA)却显然缺席了。苏联在20世纪70年代首次将机器人探测车送上月球;印度在2019年尝试过一次,但以失败告终。目前唯一还在运行的,是中国的玉兔二号月球车,在过去四年时间里,这台重达140千克的机器在月球背面运行了逾1400米,发回许多岩石影像。希腊、日本和阿联酋也都在开展自己的月球车项目。

关键词：机器人月球车探测车月球背面国际竞争阿联酋 NASA

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视频培训师帮助创业者打造形象

商业周刊（中文版） 2023年第5期 30-31页

作者： katrina manson 杜然(译) 不详

创业者们正通过社交媒体课程学习如何在网上出彩在新企业创办人的待办事项清单上,有一项就是为他们的网站撰写“关于……”也就是拟成立组织的目标,再夹杂一些有关领导者的个人花絮等。2019年,当玛丽亚·伯格伦德(MariaBerglund)在俄勒... 详细信息

创业者们正通过社交媒体课程学习如何在网上出彩在新企业创办人的待办事项清单上,有一项就是为他们的网站撰写“关于……”也就是拟成立组织的目标,再夹杂一些有关领导者的个人花絮等。2019年,当玛丽亚·伯格伦德(MariaBerglund)在俄勒冈州波特兰市创立InKindBoxes时,她还在“关于”部分里简要介绍了自己成立这家非营利组织的灵感:她产后从医疗服务提供者那里得到的产后支持很少,还有自己对单身母亲获得社区援助的童年记忆。她说:“如果人们对这个网站很好奇,我很乐意与大家分享。”

关键词：培训师波特兰市俄勒冈州单身母亲社区援助创办人社交媒体玛丽亚

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美国国安局进军青少年夏令营市场

商业周刊（中文版） 2022年第12期 17-19页

作者： katrina manson 赵萌萌(译) 不详

夏令营的第二天,阿什利•威尔逊德布里亚诺(Ashley Wilsondebriano)做了一个“自杀开关”。这名17岁的高中生操纵着一个标有“紧急停止”的虚拟蓝色按钮,从菜单栏上移到屏幕中间的一个灰色标签内。只要轻敲一下她笔记本电脑的空格键,她... 详细信息

夏令营的第二天,阿什利•威尔逊德布里亚诺(Ashley Wilsondebriano)做了一个“自杀开关”。这名17岁的高中生操纵着一个标有“紧急停止”的虚拟蓝色按钮,从菜单栏上移到屏幕中间的一个灰色标签内。只要轻敲一下她笔记本电脑的空格键,她的无人机就会从天上掉下来。

关键词：笔记本电脑菜单栏紧急停止阿什利无人机夏令营虚拟高中生

Voices From the Industry:How EdTech Leaders Responded to the COVID-19 Pandemic

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ECNU Review of Education 2024年第2期7卷 420-441页

作者： Deoksoon Kim katrina Borowiec Drina Kei Yatsu Stanton Wortham Boston College Lynch School of Education and Human DevelopmentI40 Commonwealth AvenueChestnut HillMA02467-3800USA

Purpose Educational technology(“EdTech”)served a pivotal role in keeping schools functioning during the beginning of the COVID-19 *** is known about EdTech leaders’roles in shaping this *** study explores EdTech leaders’perspectives and backgrounds,their response to the pandemic,how they envision their roles as educators,and their perspectives about how technology facilitates educational ***/Approach/Methods This study uses a qualitative,phenomenological approach to understand how 11 EdTech leaders experienced the *** were recruited for interviews in summer 2021 via purposive sampling to include diverse backgrounds and *** were analyzed *** The findings show that a four-category typology can be used to describe EdTech leaders’diverse backgrounds and *** emphasized equity and open collaboration in their pandemic responses,by expanding access to their tools and adapting their products as users’needs *** leaders anticipate streamlined user experiences,improvements in online learning,and increased adoption of artificial intelligence and simulated learning ***/Value This study addresses a gap in the research concerning EdTech leaders’perspectives on their efforts to support educators and their experiences during the *** hope this study sparks additional research on EdTech leaders’experiences and roles in education.

关键词： Collaboration COVID-19 pandemic educational technology innovation leadership technology access

A Spectacle of Tradition and Modernity

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ChinAfrica 2024年第10期16卷 56-57页

作者： katrina JACOB 不详

China Through My Camera programme provides Namibian influencer a chance to get a multidimensional view of the *** graduating in Beijing in 2020 during the tumultuous period of COVID-19,I didn’t think that I would be able to return to China anytime *** pandemic had disrupted lives globally,and like many international students,I was not sure if I would be able to ever set foot in China *** restrictions were stringent,and the idea of returning seemed like a distant dream.

关键词： dream dis get

A New Era in EdTech:Emerging Challenges and Opportunities

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ECNU Review of Education 2024年第2期7卷 252-257页

作者： Deoksoon Kim katrina Borowiec Stanton Wortham Lynch School of Education and Human Development Chestnut HillMassachusetts 02467-3800USA

The COVID-19 pandemic dramatically expanded the increasingly important role of educational technology(“EdTech”)in K-16 *** is“the introduction of information and technology tools in teaching and learning”(Ganimian et al.,2020,p.5).Examples of EdTech include audio-visual aids,computer-assisted learning,mobile devices,smart technologies,and virtual reality(Huang et al.,2019).One sign of the growing importance of technology in schools is the rapid increase in EdTech investments,which tripled between 2019(pre-COVID)and 2021(during COVID;HolonIQ,2022).Nonetheless,inequality in access to technology remains a barrier for students in underserved schools(Chapman et al.,2010;Dorn et al.,2020).

关键词： smart teaching expanded

Measurement and quantification of caking in excipients and food products with emphasis on the non-homogeneous interaction with ambient moisture

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Particuology 2021年第3期19卷 75-83页

作者： katrina Brockbank Brian Armstrong Jamie Clayton Freeman Technology Ltd 1 Miller CourtSevern DriveTewkesburyGloucestershireGL208DNUK

Whilst caking occurs via several different mechanisms,absorption and migration of moisture is frequently the most dominant mechanism within the food and pharmaceutical *** understanding the propensity to cake is important for minimising down-stream process issues,however most characterisation techniques assume that moisture induced caking occurs homogenously through the sample resulting in a uniformly caked powder *** this study,the effect of moisture induced caking on powder flowability was investigated using powder *** materials,including skimmed milk powder(SMP)and sulphated methyl ester(SME)were stored for several days under controlled humidity *** flow energies,a measure of the resistance to flow,were measured at 24 h intervals using an FT4 Powder *** the energy is measured as a function of the bed height,variations in the powder bed are also *** results demonstrated that caking does not always occur uniformly,instead a caked region(or crust)forms at the air-powder interface and then progresses through the powder ***,the strength of this caked region was shown to increase over several days before stabilising.

关键词： Powder Caking Crust formation Powder rheometry Relative humidity

Alcoholic pancreatitis:Lessons from the liver

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World Journal of Gastroenterology 2010年第11期16卷 1314-1320页

作者： Dahn L Clemens katrina J Mahan Department of Internal Medicine University of Nebraska Medical Center Research Service Veterans Administration Medical Center

The association between alcohol consumption and pancreatitis has been recognized for over 100 years. Despite the fact that this association is well recognized, the mechanisms by which alcohol abuse leads to pancreatic tissue damage are not entirely clear. Alcohol abuse is the major factor associated with pancreatitis in the Western world. Interestingly, although most cases of chronic pancreatitis and many cases of acute pancreatitis are associated with alcohol abuse, only a small percentage of individuals who abuse alcohol develop this disease. This situation is reminiscent of the association between alcohol abuse and the incidence of alcoholic liver disease. The liver and the pancreas are developmentally very closely related. Even though these two organs are quite different, they exhibit a number of general structural and functional similarities. Furthermore, the diseases mediated by alcohol abuse in these organs exhibit some striking similarities. The diseases in both organs are characterized by parenchymal cell damage, activation of stellate cells, aberrant wound healing, and fibrosis. Because of the similarities between the liver and the pancreas, and the alcohol-associated diseases of these organs, we may be able to apply much of the knowledge that we have gained regarding the effects of alcohol on the liver to the pancreas.

关键词： Alcoholic pancreatitis Alcohol metabolism Stellate cells Fibrosis

Behavioral and physiological flexibility are used by birds to manage energy and support investment in the early stages of reproduction

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Current Zoology 2010年第6期56卷 767-792页

作者： Franois VZINA katrina G. SALVANTE Département de Biologie chimie et géographieGroupe de recherche sur les environnements nordiques BORASUniversité du Québec à Rimouski Department of Biological Sciences Simon Fraser University

Interest in phenotypic flexibility has increased dramatically over the last decade, but flexibility during reproduction has received relatively little attention from avian scientists, despite its possible impact on fitness. Because most avian species maintain atrophied reproductive organs when not active, reproduction in birds requires major tissue remodeling in preparation for breeding. Females undergo rapid （days） recrudescence and regression of their reproductive organs at each breeding attempt, while males grow their organs ahead of time at a much slower rate （weeks） and may maintain them at maximal size throughout the breeding season. Reproduction is associated with significant metabolic costs. Egg production leads to a 22%-27% increase in resting metabolic rate （RMR） over non-reproductive values. This is partly due to the activity of the oviduct, an organ that may allow females to adjust reproductive investment by modulating egg size and quality. In males, gonadal recrudescence may lead to a 30% increase in RMR, but the data are inconsistent and general conclusions regarding energetic costs of reproduction in males will require more research. Recent studies on captive female zebra finches describe the impacts of these costs on daily energy budgets and highlight the strategies used by birds to maintain their investment in reproduction when energy is limited. Whenever possible, birds use behavioral flexibility as a first means of saving energy. Decreasing locomotor activity saves energy during challenges such as egg production or exposure to cold temperatures and is an efficient way to buffer variation in individual daily energy budgets. However, when behavioral flexibility is not possible, birds must rely on flexibility at the physiological level to meet energy demands. In zebra finches breeding in the cold, this results in a reduced pace of laying, likely due to down-regulation of both reproductive and non-reproductive function, allowing females to defend mini

关键词： Phenotypic plasticity Phenotypic flexibility BMR Energy budget Organ Egg size Physiological tradeoff Fitness