Tracking user-role evolution via topic modeling in community question answering     

Chaogang Fu 《Information processing & management》2019,56(6):102075

Community question answering (CQA) services that enable users to ask and answer questions are popular on the internet. Each user can simultaneously play the roles of asker and answerer. Some work has aimed to model the roles of users for potential applications in CQA. However, the dynamic characteristics of user roles have not been addressed. User roles vary over time. This paper explores user representation by tracking user-role evolution, which could enable several potential applications in CQA, such as question recommendation. We believe this paper is the first to track user-role evolution and investigate its influence on the performance of question recommendation in CQA. Moreover, we propose a time-aware role model (TRM) to effectively track user-role evolution. With different independence assumptions, two variants of TRM are developed. Finally, we present the TRM-based approach to question recommendation, which provides a mechanism to naturally integrate the user-role evolution with content relevance between the answerer and the question into a unified probabilistic framework. Experiments using real-world data from Stack Overflow show that (1) the TRM is valid for tracking user-role evolution, and (2) compared with baselines utilizing role based methods, our TRM-based approach consistently and significantly improves the performance of question recommendation. Hence, our approach could enable several potential applications in CQA.  相似文献   

Role Development in the Managed Care Era: A Case of Hospital-Based Nursing     

Julie Apker 《Journal of Applied Communication Research》2001,29(2):117-136

Managed care poses numerous opportunities and challenges for today's health care organizations and their employees. This article investigates the ways that hospital nurses develop and make sense of their professional roles and organizational environments in a changing and often uncertain managed care setting. The case study approach used in this research combined qualitative methodologies to gain a rich, detailed, and contextual understanding of nurses' work roles and organizational experiences. After an analysis of interviews with 24 nurses and observations of nurses' communicative activities on one inpatient unit, the complexity of sensemaking and role development in a managed care environment is considered. Conclusions are then drawn regarding the theoretical and pragmatic implications of nurses' communicative processes, as they attempted to develop and understand their roles in a changing organizational context.  相似文献   

低应变法检测桥梁嵌岩桩的评价     

瞿俊 《安徽职业技术学院学报》2004,3(4):17-19

用低应变法检测嵌岩桩 ,若桩底出现明显同相反射 ,多数因桩底缺陷引起。而区分是桩还是持力层的缺陷 ,主要看反射的起跳时间在 2 L/ C之前还是之后。当桩的变径及入岩反射对测试影响很大时 ,应进一步用钻芯法检验。  相似文献   

男子青少年体操运动员肘、腕关节劳损性伤痛的防治     

魏旭波 《湖北体育科技》1996,(3)

男子青少年体操运动员肘关节、腕关节劳损性伤痛是训练中的一种常见多发性运动损伤，严重阻碍了训练计划的执行和运动技术的提高。本文分析和研究了伤痛形成的各种原因，并提出了预防、治疗的基本方法。  相似文献   

肌肉拉伤的临床和基础理论研究     

侯曼  侯佳 《中国体育科技》2003,39(2):8-11

肌肉拉伤是运动损伤中的常见病。在临床上认为,大多数肌肉拉伤是由于肌肉性质改变造成的局部损伤,可以诊断出损伤的位置,多发生于靠近肌肉—肌腱连接处的肌纤维。生物力学研究表明:当肌肉受到的拉伸力大于其最大等长收缩力时将会引起损伤。比较肌肉在被动拉伸和有神经刺激收缩的主动拉伸时发现,在损伤时拉伸力有小量增加,应变没有变化,但吸收能量的能力却有很大的变化。实验还证实了肌肉的粘弹性。这些研究成果说明:肌肉吸收能量的能力和粘弹性的改变对于预防肌肉损伤是非常重要的。  相似文献   

骑马蹲裆式与髌骨劳损的预防   总被引：3，自引：0，他引：3  

孙维国 《天津体育学院学报》2002,17(2):69-71

为探索传统武术训练中的骑马蹲裆式对髌骨劳损的预防作用，作者用积累了十年的运动损伤资料和文献，从解剖学，生物力学，运动医学的解度，论述了膝关节半蹲位诸姿势中以骑马蹲裆式其髌韧带的力臂最长，髌股关节面接触面大，髌股关节面的压应力大并有利于发展股内侧肌的力量，可以限制髌骨外移，从而预防髌骨劳损的有效方法。  相似文献   

加强"两课"在高校思想政治教育中主渠道和主阵地作用的思考     

张丰 《喀什师范学院学报》2005,26(5):78-80

从四个方面阐述了“两课”教学中存在的普遍问题,并从提高教师素质、改进教学方法、领导重视三方面提出了创新“两课”教学,发挥其在高校思想政治教育中主渠道和主阵地作用的方法。  相似文献   

I’m New…Again: Reconceptualizing the Socialization Process Through Rotational Programs     

Stephanie L. Dailey 《Communication Studies》2016,67(2):183-208

Communication scholars have studied how organizations socialize new employees in breadth, but we know less about how employees adapt to multiple roles rather than just one position. With the rise of rotational programs, which introduce newcomers to several different jobs within a brief time, socialization theory should be expanded. This study focused on people’s experiences in rotational programs to provide a more accurate picture of this complex socialization process. Longitudinal, qualitative data from employees during their first and second job rotation revealed that such employees’ socialization differs from traditional employees’ experiences. The results suggested a Model of Rotational Socialization that more accurately portrays the socialization process by accounting for the contrast between role and organizational socialization.  相似文献   

加强党风廉政建设精心构建和谐校园   总被引：2，自引：0，他引：2  

胡燕 《黄冈职业技术学院学报》2005,7(4):7-9

党风廉政建设搞得好不好，是学院和谐与否的重要标志。加强党风廉政建设是构建和谐校园的应有之义，应努力搞好校园党风廉政建设，为和谐校园建设提供保障。  相似文献   

钢结构材料在高温(火灾)条件下的力学性能试验研究     

魏瑞演 《福建工程学院学报》2002,(1)

从基本的钢结构材料在高温下的力学性能着手 ,进行高温条件下钢结构材料的性能试验 ,建立高温下钢材的屈服强度、极限强度、弹性模量和极限应变随温度变化的力学模型 ,为高温 (火灾 )条件下钢结构的结构分析提供依据。  相似文献