Seroprevalence of SARS-CoV-2 in Croatian solid-organ transplant recipients

IntroductionThe data on the coronavirus disease (COVID-19) in solid-organ transplant recipients (SOTRs) in Croatia is unknown. The aim of this study was to analyze the seroprevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in Croatian SOTRs.Materials and methodsFrom 7 September to 27 November 2020 (beginning of the second COVID-19 pandemic wave), a cross-sectional screening for COVID-19 was performed in the adult outpatient liver (LTRs; N = 280) and kidney transplant recipients (KTRs; N = 232). Serum samples were initially tested for SARS-CoV-2 IgG antibodies using a commercial enzyme-linked immunosorbent assay (ELISA; Vircell Microbiologists, Granada, Spain). All positive samples were confirmed using a virus neutralization test (VNT). Data on risk exposure and COVID-19 related symptoms were collected using a questionnaire.ResultsThe transplanted cohort’s seroprevalence detected by ELISA and VNT was 20.1% and 3.1%, respectively. Neutralizing (NT) antibodies developed in 15.6% of anti-SARS-CoV-2 ELISA IgG positive SOTRs. The difference in seropositivity rates between LTRs and KTRs was not statistically significant (ELISA 21.1% vs. 19.0%, P = 0.554; VNT 3.6% vs. 2.6%, P = 0.082). Overall VNT positivity rates were higher in patients who reported participation in large community events (5.9% vs. 1.0%; P = 0.027) as well as in patients who reported COVID-19 related symptoms in the past six months. In addition, symptomatic VNT positive patients showed significantly higher (P = 0.031) NT antibody titers (median 128, interquartile range (IQR) = 32-128) compared to asymptomatic patients (median 16, IQR = 16-48).ConclusionsThis study showed that 15.6% of anti-SARS-CoV-2 ELISA positive Croatian SOTRs developed NT antibodies indicating protective immunity. Further studies are needed to determine the dynamic of NT antibodies and COVID-19 immunity duration in immunocompromised populations such as LTRs and KTRs.     

皖麦19高产的氮素与密度效应研究

本试验采用二次饱和Ｄ———最优设计,分析了皖麦１９氮素和密度７５００ｋｇ／ｈｍ２的产量效应,得出综合效应方程。结果表明：氮素的增产效应大于密度,二者互作是负效应。增施氮肥能明显增加公顷穗数和穗粒数,增加密度也能增加公顷穗数,但两者增加都会使千粒重下降。达到最高产量７９５４ｋｇ／ｈｍ２时的施氮量是２７０ｋｇ／ｈｍ２,密度是１７２万／ｈｍ２苗,这时最理想的产量结构是每公顷５４０．９万穗,每穗４４粒,千粒重３５．３克。     

Business optimism and the innovation-profitability nexus: Introducing the COVID-19 adaptable capacity framework

In this paper we develop a novel multi-stage integrative framework for technology foresight-planning. This framework integrates econometric analysis and a technology foresight procedure to predict: (i) the most COVID-19 resilient industries at the national level; and (ii) the most adversely affected industries (due to prior investment in innovation) that requires public support. Our econometric results show that the pandemic has induced a ‘double-edge sword’ effect of innovation on firm’s COVID-19 adaptable capacity (CAC). Costly innovation undertaken before the pandemic can be bad for firms if it compounds the problem of declining post-pandemic outbreak profit and optimism. Contrarily, firm level innovation improves firm’s CAC as the prior innovators’ profitability are found to have above-even odds of rebounding quickly post-pandemic outbreak. Our empirical analysis focuses mostly on developing economies, where firms are most likely implementing only incremental (non-frontier) innovation and thus our results should be generalized with caution.     

Organizational resilience and digital resources: Evidence from responding to exogenous shock by going virtual

Recent events have renewed attention to how organizations rely on digital resources in response to exogenous shock. Though the literature on organizational resilience indicates that this is best understood as a process through which organizational actors respond to a specific shock, most IS research attends to resilience as an outcome. Against that backdrop, we present a case study of how a university shifted to virtual teaching in response to a government-imposed lockdown during the COVID-19 pandemic. Adopting a digital resourcing perspective allowed us to reveal the organizational resilience process and the way digital resources shaped it. We found that the resilience process unfolded in stages as educators, assisted by students, managers, and IT personnel pivoted, adapted, and normalized into teaching virtually. Across these stages, digital resources took on specific roles as the resilience process progressed from the organization’s pre-shock accumulation of digital resources into its continued digitalization efforts. Based on these findings, we contribute to existing literature by advancing and empirically substantiating a process view of the role of digital resources in organizational resilience.     

从十九大报告解读群众体育国策和体育强国内涵*

我国的体育行业发展仍然不充分和不平衡，距离体育强国的要求还有很长一段路要走，因此以十九大报告为契机重新解读体育强国思想内涵对建设体育强国建设具有重要的意义。采用文献资料法和理论分析法对不同时代的“体育强国”精神进行归纳，分析十九大报告内容，研究群众体育国策对体育强国梦：群众体育、体育产业、体育竞技、体育文化等的时代意义。十九大报告体育强国的内涵：加强体育强国与中国复兴梦的联系是顺应新时代的必然选择，群众体育国策是建立体育强国的核心内容，以发展群众体育为起点，带动体育产业不断的改革创新、以自强不息敢于拼搏的体育竞技精神为内核，逐步实现体育强国梦和中华民族伟大复兴梦。     

Considerations for development and use of AI in response to COVID-19

Artificial intelligence (AI) is playing a key supporting role in the fight against COVID-19 and perhaps will contribute to solutions quicker than we would otherwise achieve in many fields and applications. Since the outbreak of the pandemic, there has been an upsurge in the exploration and use of AI, and other data analytic tools, in a multitude of areas. This paper addresses some of the many considerations for managing the development and deployment of AI applications, including planning; unpredictable, unexpected, or biased results; repurposing; the importance of data; and diversity in AI team membership. We provide implications for research and for practice, according to each of the considerations. Finally we conclude that we need to plan and carefully consider the issues associated with the development and use of AI as we look for quick solutions.     

Information technology solutions,challenges, and suggestions for tackling the COVID-19 pandemic

Various technology innovations and applications have been developed to fight the coronavirus pandemic. The pandemic also has implications for the design, development, and use of technologies. There is an urgent need for a greater understanding of what roles information systems and technology researchers can play in this global pandemic. This paper examines emerging technologies used to mitigate the threats of COVID-19 and relevant challenges related to technology design, development, and use. It also provides insights and suggestions into how information systems and technology scholars can help fight the COVID-19 pandemic. This paper helps promote future research and technology development to produce better solutions for tackling the COVID-19 pandemic and future pandemics.     

疫情期间不同传播渠道对公众“自我卷入”程度的影响

实证表明新冠肺炎疫情下公众选择不同传播渠道产生的"自我卷入"程度不一:短视频、微博(或微信)、新闻类APP等移动新传播渠道给公众造成的恐惧感更为显著;电视(或广播)等传统渠道更能影响公众的应急反应,让公众主动采取防护措施,积极进行自我保护和积极应对;但公众在权威信息、疫情进展上对电视(或广播)等传统渠道的期望值更高。主流媒体应从把控信息源头、创新表达形式、布局好舆情监测机制、做好媒体议程设置等四个方面来提高自身公信力,提高公众对主流信息的"自我卷入"程度,以防范可能出现的"信息疫情",维护社会秩序健康稳定。     

新冠肺炎疫情语境中多元媒介的微博话语表达

本文使用隐性主题分析、社会网络分析和多元对应分析等方法,通过对新冠肺炎疫情中活跃传统媒体账号微博的内容分析,考察其中与新冠肺炎相关的主题、相关报道话语随时间的变化,不同类型的媒介主体是否存在表达差异。结果显示,这些微博在内容上既呈现了宏观叙事,也包括了微观话语,随着时间的变化有着明显的阶段性差异,而且媒体之间有着鲜明的内容和风格差异性。本研究为深入研究传统媒体和社交媒体之间的复杂关系提供了参考。     

体育专业基础理论课中融入十九大精神的探索

深入学习和贯彻十九大精神是当前重要的政治任务,是教育系统实现"立德树人"的重要工作。基于对《十九大报告全文》的学习与领悟,结合2个学期的体育专业基础理论课中融入十九大精神的实践探索。主要结论:应高度重视在课堂融入十九大精神的时代性与重要性;教师应密切关注国家大政方针,深入学习、全面领悟十九大精神;结合体育专业基础理论课堂特点,应把握时机,机动灵活融入十九大精神;师生互动,课内课外结合,学习并践行十九大精神;以十九大精神为指引,领悟其对体育专业基础理论的指导意义。