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

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.     

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

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.     

试论南京国民政府对我国盐政主权的收回

南京国民政府成立后，在关税自主、恢复和保留盐务稽核所的同时，通过变更职权和对洋人任用的变更开始了收回我国盐政主权的活动。南京国民政府当时对我国盐政主权的收回活动，现在看来，具有一定的历史意义。     

苏俄政府在华策略与京汉铁路工人罢工

20世纪20年代苏俄政府在华策略经历了一个从联合吴佩孚到促使吴与孙中山联合再到联合孙中山的过程。这种策略客观上促进了以京汉铁路工人罢工为标志的中国北方工人运动发展的高潮，也在一定程度上影响了中国共产党人对国内政治形势的判断及其活动。     

蒋廷黻与南京国民政府联苏制日外交（二）

出任南京国民政府驻苏大使为蒋廷黻外交生涯之重要一章。作为临危受命的外交官，蒋廷黻衔令谋求推进南京当局联苏制日外交方略之实现，且衡诸情势变迁，试图谋求该方略之内涵与外延得以拓展，彰显出其独特的外交误解见与公忠谋国之心。     

美国信息自由法:从《信息自由法令》到《电子信息自由法令》

本文主要介绍了美国<信息自由法令>的产生及发展过程及美国联邦各机构对<信息自由法令>的执行情况,从中简要概括出美国<信息自由法令>及其执行情况对于我国<政府信息公开条例>的贯彻实施的可借鉴之处.     

基于用户感知有用性和易用性的政府门户网站研究

本文从影响用户接受和使用政府门户网站的因素出发,认为感知有用性和感知易用性是影响用户接受和使用政府门户网站的决定性因素,认为要达到满足用户需求的目的,政府门户网站的建设必须遵循感知有用性和感知易用性的原则。最后,从功能定位方面探讨了网站的不足,并提出了相关建议。     

政府主导下的社会知识保障体系

本文从生产与归属角度出发,认为知识可分为个人知识和社会知识。教育机构、科研院所、公共知识中心(图书馆)、情报部门和其他文化组织,共同构成了社会知识保障体系。政府是社会公共管理的主体,应当在制度、市场、设施和人才等方面采取有效措施,积极引导社会知识保障体系可持续发展。     

论政府信息资源生命周期管理

政府信息资源从产生到消亡是一个完整的过程,符合生命周期思想的内涵。政府信息资源周期的4个阶段是:产生期、处理期、应用期、衰退期。构建政府信息资源生命周期管理模型,以初步构筑起政府信息资源生命周期理论体系。图1。参考文献10。     

电子政务动态信息采集模型的研究

电子政务动态信息采集模型的设计,要有高效、便利的信息采集平台,支持多种数据格式,提供丰富的检索手段,有支持数字信息的安全管理与审核机制,有开放的多元化的信息资源发布平台,提供资源整合手段。其各项功能由6个子模块提供。图1。参考文献7。