Smartphones and psychological well-being in China: Examining direct and indirect relationships through social support and relationship satisfaction

Drawing insights from media richness theory and the Internet-enhanced self-disclosure hypothesis, this study examined the direct and indirect relationships between multiple uses of the smartphone and psychological well-being. A national online survey of smartphone users in China (N = 908) was conducted. Findings based on structural equation modelling showed that face-to-face and mobile voice communication directly predicted well-being whereas the relationship was indirect for mobile email, Weibo and WeChat through social support and relationship satisfaction. The results demonstrated the importance of examining smartphone use more holistically and using theory-based perspectives to explain the contingent mechanisms linking smartphone use and well-being.     

HTML5技术在移动互联网中的应用

HTML5技术即将成为新一代Web标准,也会成为未来移动互联网Web应用的关键技术。文章通过对HTML5新的关键特性进行分析,研究基于HTML5的移动Web应用相较于本地应用的优势,并从移动浏览器的兼容程度出发,分析了混合型应用(Hybrid AppS)在当前阶段的重要性。     

Applying the Gateway Belief Model to Genetically Modified Food Perceptions: New Insights and Additional Questions

The Gateway Belief Model (GBM) suggests that highlighting a scientific consensus is the key to improving beliefs about important scientific issues. However, questions have been raised on how one's perception of a scientific consensus affects his or her personal scientific beliefs. Reporting on 2 online experiments, findings suggest that consensus messages designed to impact beliefs on a controversial scientific issue—genetically modified (GM) foods—affect audience segments in different ways. People with low prior support for GM foods are less affected by a message emphasizing a scientific consensus about GM food safety. Including visual exemplars of a scientific consensus in these messages might make them more salient. However, questions remain on how best to apply the GBM to persuasive science communication.     

X-Decaf : Android平台社交类应用的缓存文件泄露检测

由于社交类应用涉及的隐私数据类型非常多,导致这类应用在被广泛使用的同时,频繁出现用户隐私泄露事件,但是目前还鲜有针对社交应用的隐私泄露检测机制的研究。该文结合Android系统的特性,提出一个面向Android社交类应用检测框架X-Decaf(Xposed-based-detecting-cache-file),创新性地利用污点追踪技术以及Xposed框架,获取应用内疑似泄露路径,监测隐私数据的缓存文件。此外,该文给出了对隐私泄露进行评级的建议,并利用该框架对50款社交类应用进行了检测,发现社交类应用普遍存在泄露用户隐私信息的漏洞。     

限制GPS专用实时监控网容量的因素及解决方法

提高ＧＰＳ专用实时监控网的容量对实时应付突发事件，节省频率资源，降低建设与管理费用等具有重要意义。本文介绍了ＧＰＳ专用实时监控网的组成，分析了限制ＧＰＳ专用实时监控网容量的因素，针对这些因素，提出了一些提高容量的方法，并且已实际应用中取得较大进展。     

Systematic evaluation of mobile fitness apps: Apps as the Tutor,Recorder, Game Companion,and Cheerleader

Mobile fitness applications are innovating the ways in which smartphone users self-manage their health. Prior research found that app functions may impact app efficacy. However, research to date has not sought to systematically investigate how different combinations of app functions impact user response to apps, especially adoption intent. This article describes two studies on mobile fitness app characteristics and user attitudes. Study One used content analysis and hierarchical cluster analysis on 98 iPhone fitness apps and identified four app clusters: “Tutor”, “Recorder”, “Game Companion”, and “Cheerleader.” Tracking was the predominant function in current market, but tracking-focused Recorder apps received lowest user ratings among all app clusters. Users favored Tutor apps that combine exercise education and tracking, and Game Companion apps that combine gamification, tracking, and social functions. Function combinations, rather than standalone functions, impact app success. Following a Reasoned Action Approach, Study Two found various effects of individual differences (age, gender, BMI, eHealth literacy, smartphone experience, function preference) on user attitude toward different fitness app types. A comparison between two studies demonstrated a mismatch between market offerings and user needs regarding app functions. Implications of results for mobile fitness app design to improve consumer health and for theories are discussed.     

An Improvement of Mobile Users Authentication in the Integration Environments

This paper shows that Tzeng and Tzeng's protocol has a drawback that the protocol can be easily crashed by an evil VLR attack. Therefore, we propose a slight modification to their protocol toimprove their shortcoming. As a result, our protocol does not only enhance the security of Tzeng and Tzeng's protocol but also improves the efficiency.     

Understanding emotions experienced when using a mobile phone in public: The social usability of mobile (cellular) telephones

The widespread and continued growth of mobile telephony within society means that protocols regarding acceptable public use are being continually redefined. In order to understand the different needs and motivations of mobile phone users and to assist with the development of effective policy, it is important first to consider the phone-related behaviours with which people are comfortable and those with which they become annoyed. A survey of 184 young adults was undertaken to explore the relationships between their comfort making and receiving mobile phone calls in different social contexts, their affective responses to public mobile phone use by others, and how such factors relate to key personal attributes and specific beliefs regarding calling behaviour. Mobile phone users differed in the extent to which they felt comfortable making and receiving calls in different social contexts and were less annoyed by others using mobile phones in locations where they themselves felt most comfortable making calls. Three important influences which predicted behavioural measures of phone use were found to be views regarding the application of public restrictions, desire to remain personally contactable and ‘social usability’ or anxiety regarding phone use in the presence of others. User personality and individual attributes such as age and gender were also found to be differentially associated with some aspects of phone-related behaviours.     

The Appearance of Accountability: Communication Technologies and Power Asymmetries in Humanitarian Aid and Disaster Recovery

New communication technologies are celebrated for their potential to improve the accountability of humanitarian agencies. The response to Typhoon Haiyan in 2013 represents the most systematic implementation of “accountability to affected people” initiatives. Drawing on a year‐long ethnography of the Haiyan recovery and 139 interviews with humanitarian workers and affected people, the article reveals a narrow interpretation of accountability as feedback that is increasingly captured through mobile phones. We observe that the digitized collection of feedback is not fed back to disaster‐affected communities, but is directed to donors as evidence of “impact.” Rather than improving accountability to affected people, digitized feedback mechanisms sustained humanitarianism's power asymmetries.     

Staying Ahead of the Digital Tsunami: The Contributions of an Organizational Communication Approach to Journalism in the Information Age

This essay addresses the challenges facing journalism in the information age by advocating for the study of journalism from an organizational communication perspective. The communication field has maintained an illogical divide between journalism and organizational communication scholarship. First, I present an overview of subdisciplinary identities. Second, I argue for an organizational communication approach to the study of journalism and refer to an empirical study as an exemplar of this approach. Finally, I present ideas for future research regarding the study of journalism and these subdisciplines. This approach is applicable to settings like newspapers, television news, and other media organizations. Analyzing journalism from an organizational communication perspective can connect academic subdisciplines and aid practitioners in understanding a rapidly evolving media landscape.     

Communication,Social Movements,and Collective Action: Toward a New Research Agenda in Communication for Development and Social Change

The growing emphasis on collective action raises new questions for research and practice in communication for development and social change. What actors drive processes of collective action? What are the communication features of their interventions? What type of social change processes do they enhance? What evidence demonstrates the impact of collective action processes? What theoretical frameworks inform our understanding of collective action and social change? What is the role of communication scholarship in this context? In this article, we address these questions, review the contexts of contemporary transformation and key debates in communication for development and social change, and propose a research agenda for an interdisciplinary field of inquiry.     

通信系统的中继站:过去、现在和未来

以通信系统自身的演变历史为脉络,讨论中继站的设置目的、运转方式、特点、局限性及其沿革,以期从一个侧面揭示通信系统的发展规律。     

新媒体时代传统媒体战略转型与融合发展路径研究

2014年,注定以“媒体融合元年”为标志写入中国新闻发展史。在新一代信息技术支撑下,推动传统媒体和新媒体融合发展,既是技术问题,又是战略任务,必将对未来的媒体形态和格局产生深远影响。新媒体带来新思维,新思维带来新变革。作为媒体人,只有以改革创新精神迎接变革,加快媒体在理念、体制、技术、内容、运营等多个方面的融合,为民众提供更高效、更实时、更接地气的媒体内容,才能在这场变革中引领时代潮流,走出特色的科学发展之路,最终形成立体多样、融合发展的现代传播体系。     

An analytical study of the communication cost of data-centric storage in mobile ad hoc networks

Data-centric storage is a fundamental data management paradigm in wireless multihop networks. Originally introduced for wireless sensor networks, existing approaches are in principle also applicable in mobile ad hoc networks. However, the mobility of such networks strongly impacts storage performance in general and communication cost in particular. While this is recognized in the research community, a detailed account of the performance in terms of communication cost is lacking.In this article, we provide a detailed study of the communication cost of previously proposed data-centric storage mechanisms that are viable in mobile ad hoc networks. We first introduce a comprehensive analytical model that suitably characterizes the communication cost of data-centric storage mechanisms from the literature. We then use our model to evaluate the considered mechanisms in comparative terms as a function of relevant system parameters, including the amount of considered data, the frequency of data updates and queries, and node speed. Our results give a detailed account of data-centric storage performance and are able to identify the most suitable ranges of operation for each of the considered mechanisms.     

Bringing Technological Frames to Work: How Previous Experience with Social Media Shapes the Technology's Meaning in an Organization

This study examines the expectations that workers have regarding enterprise social media (ESM). Using interviews with 58 employees at an organization implementing an ESM platform, we compare workers' views of the technology with those of existing workplace communication technologies and publicly available social media. We find individuals' frames regarding expectations and assumptions of social media are established through activities outside work settings and influence employees' views about the usefulness of ESM. Differences in technological frames regarding ESM were related to workers' age and level of personal social media use, but in directions contrary to expectations expressed in the literature. Findings emphasize how interpretations of technology may shift over time and across contexts in unique ways for different individuals.     

Evolution and use of mobile devices in higher education: A case study in Portuguese Higher Education Institutions between 2009/2010 and 2014/2015

Mobile devices’ popularity, particularly tablets and smartphones, has increased over the last years as a result of their versatility and multifunctionality. That consequently led to a wide daily use by everyone and especially among young people. Since 2010 the sales market for mobile devices has not stopped growing. This is justified by the fact that these devices present many advantages, namely usability, portability, versatility, adaptability and an ability to customize individual experiences. In the context of the teaching-learning process, mobile devices allow overcoming the temporal and physical boundaries of the classroom, since information is omnipresent and no longer limited to a specific time and place for learning, thus promoting the mLearning. In this way it is important to analyze the use of mLearning, particularly the acceptance rate and uses of mobile technologies devices in higher education Portuguese institutions. In order to answering this issue, this paper analyzes the evolution and trends in the use of mobile technologies in higher education institutions in Portugal (North region) between 2009/2010 and 2014/2015.     

In Related News,That Was Wrong: The Correction of Misinformation Through Related Stories Functionality in Social Media

Research on social media and research on correcting misinformation are both growing areas in communication, but for the most part they have not found common ground. This study seeks to bridge these two areas, considering the role that social media may play in correcting misinformation. To do so, we test a new function of Facebook, which provides related links when people click on a link within Facebook. We show users a post containing misinformation, and then manipulate the related stories to either confirm, correct, or both confirm and correct the misinformation. Findings suggest that when related stories correct a post that includes misinformation, misperceptions are significantly reduced.     

Activist Strategic Communication for Social Change: A Transnational Case Study of Lesbian,Gay, Bisexual,and Transgender Activism

This study explores activists as producers of strategic communication for social change, suggesting communication for development and social change (CDSC), activism, and public relations are not antagonistic but rather occupy a fluid space informed by cultural-economic forces. This article presents a model of cultural intermediation for social change, arguing that activism is a form of strategic communication embedded in micro, meso, and macro levels. Through a case study of transnational LGBT activism, this research demonstrates how activists function as cultural intermediaries, playing a mediating role that is often concerned with (re)producing and challenging cultural meaning.