SmartRolling: A human–machine interface for wheelchair control using EEG and smart sensing techniques     

《Information processing & management》2023,60(3):103262

Smart wheelchairs based on brain–computer interface (BCI) have been widely utilized recently to address certain mobility problems for people with disability. In this paper, we present SmartRolling, an intuitive human–machine interaction approach for the direct control of robotic wheelchair that jointly leverages EEG signals and motion sensing techniques. Specifically, SmartRolling offers two wheelchair-actuation modes for users with different physical conditions: (1) head motion only — people who are severely disabled but able to do basic tasks using eyes and head, and (2) head and hands motion — in addition to type 1, people who can use functioning hands/arms for extra tasks. The system issues operation commands by recognizing different EEG patterns elicited by motor execution (ME) tasks including eye blink, jaw clench, and fist open/close, while at the same time estimates users’ steering intentions based on their facing direction by leveraging inertial measurements and computer vision techniques. The experiment results demonstrate that the proposed system is robust and effective to meets the individual’s needs and has great potential to promote better health.  相似文献   

Sensemaking and crisis revisited: the failure of sensemaking during the Flint water crisis     

William D. Nowling  Matthew W. Seeger 《Journal of Applied Communication Research》2020,48(2):270-289

ABSTRACT

This study operationalized Weick’s [(1988). Enacted sensemaking in crisis situations. Journal of Management Studies 25(4), 305–317 and (1993). The collapse of sensemaking in organizations: The Mann Gulch disaster. Administrative Science Quarterly, 38, 628–652] theory of enacted sensemaking to examine the communication processes associated with the Flint Water Crisis of 2014–2015. A content analysis of 389 emails and attachments from a total population of N?=?37,376 pages of publicly released e-mails and documents pertaining to Flint’s water issues, identified examples of failed sensemaking by government officials. These failures hastened and intensified a growing crisis of lead contamination and an outbreak of Legionnaires disease associated with Flint’s municipal water system. Analysis of email messages suggests that strong commitments by top leaders and limited capacity were important factors as were efforts to create and maintain consensus among officials. The Flint Water Crisis offers an important application of sensemaking theory and its utility for both organizational and risk communication scholars and for practical application. The authors emphasize the importance of questioning previous assumptions and commitments, insuring that communication practitioners are involved in decisions, and avoiding over reliance on image repair as a strategic response.  相似文献   

The Program for Cooperative Cataloging’s Transformative Role as a Leader of Change     

Philip E. Schreur 《Cataloging & classification quarterly》2020,58(3-4):397-402

Abstract

The transformation of library metadata encoded in MARC to linked data will enable libraries to participate in the Semantic Web. This transformation, however, will be an iterative development dependent upon community-based decisions. The PCC, as a community-based organization, is ideally positioned to lead this transformation. As PCC guides this transition, three broad areas must be resolved: the conversion of legacy data to linked data, the use of identifiers to support controlled headings, and the transformation of current workflows to linked-data counterparts. By embracing the Web as a community, PCC can confirm its relevance in a complex web of global data.  相似文献   

Bayesian reasoning in avalanche terrain: a theoretical investigation     

Philip A. Ebert 《Journal of Adventure Education & Outdoor Learning》2019,19(1):84-95

In this article, I explore a Bayesian approach to avalanche decision-making. I motivate this perspective by highlighting a version of the base-rate fallacy and show that a similar pattern applies to decision-making in avalanche-terrain. I then draw out three theoretical lessons from adopting a Bayesian approach and discuss these lessons critically. Lastly, I highlight a number of challenges for avalanche educators when incorporating the Bayesian perspective in their curriculum.  相似文献   

我国警察体育研究的基本现状研究* ——基于Bibexcel的文献计量与可视化分析     

林〓通  姬艳涛  王〓犇 《广州体育学院学报》2019,(5):59-62

首先对中国知网数据库中收录的以警察体育为主题的文献时序分布进行梳理，通过论文发表时间与数量的变量关系对比，分析揭示该研究领域的历史脉络、发展速度以及演变规律。随后利用信息可视化软件Bibexcel绘制出警察体育研究领域的核心作者、研究机构、高被引文献的知识图谱,阐释该领域的研究结构、力量分布以及合作平台建设等情况。最后运用词频分析、共词聚类和可视化法生成关键词共现网络图谱，挖掘、提炼文献数据背后的规律与逻辑，捕捉警察体育研究领域中的研究热点和前沿动态，并在此基础上深入探讨警察体育未来研究的基本趋势和发展方向。  相似文献   

上海市大学生徒步穿越风险管理研究          下载免费PDF全文

景俊杰  陈泽旭 《体育科研》2019,(2):56-63

在对专家和领队访谈，对大学生徒步穿越活动参与者问卷调查，以及现场观察等调研的基础上，从户外运动风险源出发对上海市大学生徒步穿越风险管理问题进行系统分析，发现：大学生徒步穿越存在不少风险管理漏洞，但简单禁止活动开展反而会导致风险转移和扩散；应该着重从参与者等“人”的风险因素出发防范风险事故发生，以天气变化等部分“环境”风险因素应对进行探险体验，尽快提高指导教师和社团骨干的专业能力；高校应该对网约结伴方式参与徒步穿越活动进行风险警示，并强制性要求社团制定活动风险应急预案等。  相似文献   

Remaining in Control with an Illusion of Interactivity: The Paternalistic Side of Data Journalism*     

Ester Appelgren 《Journalism Practice》2019,13(8):956-960

  相似文献   

基于层次全息模型的中小学体育运动会风险评估研究     

陈蔚  李燕燕  黄明明 《武汉体育学院学报》2019,53(11):64-71

随着社会进步与教育环境诸多变化，中小学体育运动会风险管理亟需实现积极安全态度与现代技术防范并举。基于新时期中小学体育运动会风险评估是含有多重判断的复杂体系，该文引入层次全息建模HHM风险识别分析工具，构建包括运动会本体、组织管理、人员素质、场地设施、环境5大类别24个层次全息子系统的适用中小学体育运动会风险识别的全息模型，重点阐释了"组织管理——人员"风险识别的主场景，并通过HHM全息框架的指标转换、推演与扩展，统计中小学体育运动会风险清单全息模型配对的发生数目，运用层次分析法和帕累托分析法进行量化和评级，为中小学体育运动会风险量化评估提供参考依据。  相似文献   

上肢康复机器人主动康复训练控制策略     

刘鹏  葛小青  李宇  赵佳欣 《中国科学院大学学报》2019,36(4):570-576

近年来，脑卒中和交通事故造成上肢损伤的人数逐年上升，医疗领域对康复器械的需求越来越大。为满足实际需求，开发以气动人工肌肉为驱动器的4自由度（肩关节外收/内展（被动）、前驱/后伸、肘关节屈曲、腕关节屈曲）可穿戴上肢康复机器人。首先设计上肢康复机器人的结构，并采用气动人工肌肉作为肘关节与腕关节的驱动器。然后针对该上肢康复机器人，研究主动康复训练控制策略，设计两种控制策略。通过穿戴实验验证控制策略的有效性和实际应用价值。  相似文献   

我国冬季项目跨界跨项选材研究与启示     

郝月蓉 《河北体育学院学报》2020,34(3):42-46

运用文献资料法和逻辑分析法，对冬季项目跨界跨项选材问题进行辩证分析。认为，2022年北京冬奥会、政府专项政策导向及国内外成功的跨界经验，为我国开展冬季项目跨界跨项选材工作提供了重要的机遇和支持，但跨界跨项选材任务艰巨、冬季项目人才缺口大、运动员培养时间不足、跨界跨项风险大等问题也不容忽视。为进一步做好跨界跨项选材工作，为我国冬季项目持续发展提供充足的人力支持，应积极落实国家政策，做到科学跨选；依托同项群项目选材，跨用传统优势项目人才；抓住冬奥发展机遇，尽快建立完善的人才培养体系。  相似文献