变换器械训练法在体工队链球训练中的应用     

张大鹏 《大众科技》2014,(11):183-184

链球是田径运动中的投掷项目之一,属于一种可增长力量型的运动,对运动员的协调性和高速度旋转中身体的平衡度要求较高。在体工队链球训练的过程中,应用变换器械训练法能够帮助体工队运动员更好的掌握身体的协调性,使运动员达到身体素质和技能素质的快速提升,从而在各类比赛活动中,获得更加优异的成绩。  相似文献   

Mobility of knowledge work and affordances of digital technologies     

《International Journal of Information Management》2017,37(2):54-62

The focus of this work arises from two needs within information science literature: (1) to understand more, from an empirically driven perspective, about the increasingly visible yet understudied mobile work population, and (2) to address more clearly, from a theoretical standpoint, the ways in which information and communication technologies (ICTs) mediate the work practices of these mobile workers. Drawing on the affordance perspective, this research goes beyond simplistic conceptualizations of technological effects to explore the roles of multiple ICTs in enabling mobile knowledge work. In this paper, the use of ICTs in mobilizing information practices and the ways in which ICTs generate affordances along different mobility dimensions (spatial, temporal, contextual, and social) are examined. The empirical base of this research is a field of study of 33 mobile knowledge workers (MKWs); broadly, it focuses on the ways they employ ICTs to accomplish work in dynamic and unpredictable work conditions.  相似文献   

关于穿戴式人体传感器网络的研究思考          下载免费PDF全文

韩世鹏  Olatunji Mumini Omisore  王磊 《中国科学院院刊》2017,32(12):1322-1329

人体健康信息的监测、获取、处理是衡量个人健康状态最直接的方法,也是有效预防疾病威胁的重要手段。穿戴式人体传感器网络技术,可实现健康全过程的跟踪与智能服务,对人体信息的动态监测和疾病预防具有重大意义。文章在分析穿戴式人体传感器的前景和研究现状基础上,提出了解决穿戴式人体传感器网络核心技术的策略方法,并给出了基于人体传感器网络技术的穿戴式医疗设备中与"人-机-环境"有关的两个关键问题。  相似文献   

人体器官芯片   总被引：2，自引：0，他引：2       下载免费PDF全文

秦建华  张敏  于浩  李中玉 《中国科学院院刊》2017,32(12):1281-1289

人体器官芯片是一门新兴的前沿科学技术,也是一门典型的多学科交叉汇聚技术,对人类健康和生物产业发展具有重要战略意义,吸引了来自政府、科学界和产业界的关注,被2016年达沃斯世界经济论坛列为"十大新兴技术"之一。人体器官芯片指的是一种在载玻片大小芯片上构建的器官生理微系统,包含有活体细胞、组织界面、生物流体和机械力等器官微环境关键要素。它可在体外模拟人体不同组织器官的主要结构功能特征和复杂的器官间联系,用以预测人体对药物或外界不同刺激产生的反应,在生命科学和医学研究、新药研发、个性化医疗、毒性预测和生物防御等领域具有广泛应用前景。文章概述性介绍了人体器官芯片的起源、国际发展态势和研究进展,并对其面临的挑战和未来发展趋势予以展望。  相似文献   

Rhetorical counteraction in Kenneth Burke's A Rhetoric of Motives and The War of Words     

Kyle Jensen 《Quarterly Journal of Speech》2018,104(4):384-399

However esoteric Kenneth Burke's A Rhetoric of Motives seems at first glance, it remains highly relevant to our contemporary moment. As a philosophy of rhetoric that centers on the nature of human conflict, it helps audiences interpret the vicissitudes of political warfare with greater precision and insight. The value of A Rhetoric of Motives becomes even more apparent in light of its recently discovered second volume, The War of Words. Together, these two volumes offer a novel method of rhetorical counteraction that helps specialist and non-specialist audiences redress the threat of nationalistic war. Burke's approach to rhetorical counteraction is distinguished by the study of rhetorical devices across history. By approaching these devices systematically, Burke believed he could help his audience reframe their attitude toward evolving political events. The purpose of this article is to present a thorough account of Burke's method so that it can enrich how we teach and engage in public deliberation today.  相似文献   

What do business models do?: Innovation devices in technology entrepreneurship     

Liliana Doganova  Marie Eyquem-Renault 《Research Policy》2009,38(10):1559-1570

Building on a case study of an entrepreneurial venture, we investigate the role played by business models in the innovation process. Rather than debating their accuracy and efficiency, we adopt a pragmatic approach to business models — we examine them as market devices, focusing on their materiality, use and dynamics. Taking into account the variety of its forms, which range from corporate presentations to business plans, we show that the business model is a narrative and calculative device that allows entrepreneurs to explore a market and plays a performative role by contributing to the construction of the techno-economic network of an innovation.  相似文献   

Hierarchical summarization for delivering information to mobile devices     

Jahna Otterbacher  Dragomir Radev  Omer Kareem 《Information processing & management》2008

Access to information via handheld devices supports decision making away from one’s computer. However, limitations include small screens and constrained wireless bandwidth. We present a summarization method that transforms online content for delivery to small devices. Unlike previous algorithms, ours assumes nothing about document formatting, and induces a hierarchical structure based on the relative importance of sentences within the document. As compared to delivering full documents, the method reduces the bytes transferred by half. An experiment also demonstrates that when given hierarchical summaries, users are no less accurate in answering questions about the documents.  相似文献   

医学人工智能发展态势分析及问题浅析     

申喜凤  李美婷  南嘉乐  张维宁  孙媛媛  车美龄  高东平 《科技管理研究》2023,(7):193-198

为探究医学人工智能发展态势以及我国医学人工智能存在的问题，从医学人工智能领域论文、临床试验、医疗器械产品3个维度进行态势分析，量化分析结果显示我国和全球医学人工智能发表论文数量均呈迅速增长趋势，发文数量及高被引论文方面我国处于国际前列；人工智能临床试验开展数量和面向疾病种类较多，但临床试验注册质量有待提高；我国人工智能医疗器械获批数量逐年增加，医疗人工智能产品认证稳步推进。医学人工智能发展的同时在理论层面、技术层面、伦理法律层面以及应用层面依旧面临着诸多问题和挑战。  相似文献   

Contextualizing privacy with wearable data in higher education     

Mariah Hagadone-Bedir  Rick Voithofer  Jessica T. Kulp 《British journal of educational technology : journal of the Council for Educational Technology》2023,54(6):1619-1635

This conceptual study uses dynamic systems theory (DST) and phenomenology as lenses to examine data privacy implications surrounding wearable devices that incorporate stakeholder, contextual and technical factors. Wearable devices can impact people's behaviour and sense of self, and DST and phenomenology provide complementary approaches for emphasizing the subjective experiences of individuals that occur with the use of wearable data. Privacy is approached through phenomenology as an individual's lived bodily experience and DST emphasizes the self-regulation and feedback loops of individuals and their uses of wearable data. The data collection, analysis and communication of wearable data to support learning systems alongside privacy implications for each are examined. The IoT, cloud computing, metadata and algorithms are discussed as they relate to wearable data, pointing out privacy risks and strategies to minimize harm.

Practitioner notes

What is already known about this topic

• Data privacy is a complex topic and is approached through different perspectives, influencing the degree of an individual's data autonomy.
• Wearable technology is increasing in the consumer market and offers great potential to learning environments.

What this paper adds

• Extends extant literature on dynamic systems theory and phenomenology, contributing these perspectives to educational research in the context of student data privacy and wearable technologies.
• Provides a framework to understand the complex and contingent ways that privacy can be understood in the collection, analysis, and communication of wearable data to support learning.

Implications for practice and/or policy

• Higher education faculty and educational policymakers should consider various interactions in systems and among systems of how wearable data collection may be analysed, communicated and stored, potentially exposing students to privacy harms.
• Multiple actors in learning systems must engage in continuous and evolving feedback loops around data security, consent, ownership and control to determine who has access to student data, how it is used and for what purposes.
• The EU's General Data Protection and Regulation offers one of the most comprehensive frameworks for higher education institutions and faculty around the world to follow for protecting student data privacy.

  相似文献