SIP协议及其在网络中的应用

随着下一代互联网技术的不断发展,人们将不仅仅满足于将现有的PSTN(公共电话网)业务移植到IP网,而是需要电信运营商提供一个优秀的体系架构,将话音业务、视频业务、新兴的互联网业务整合到一个统一的框架中.SIP协议就是其中的关键纽带.     

移动教师培训平台开发技术研究

促进教师的自主专业发展,提高广大教师的教学实践水平和科研能力已经成为许多新建本科院校师资队伍建设与优化的首要任务．文中以移动学习平台在高校教师自主专业发展中的应用为出发点,针对新建本科院校教师专业发展的实际需求,设计了一种可满足高校教师及时获取最新科技信息、优质教学资源、学科前沿资讯,且支持随时随地进行学术问题探究的移动教师培训平台,并通过原型系统的开发验证该平台的功能设计与系统性能．     

‘Pervy role-play and such’: girls' experiences of sexual messaging online

Sexting is one of the recurring causes of concern in public discussion of young people and network media. This paper builds on findings from a survey with 1269 Finnish female respondents aged 11–18 conducted using a popular online community for girls on their experiences of and views on online messages concerning sex and sexuality. Sixty-five per cent of respondents had received messages related to sex from either adults or minors while 20% had also sent such messages themselves. The paper asks how girls experience and make sense of sexual messaging and what motivates them to engage in such interactions. Specific attention is paid to the distinction between unwanted and wanted messages. While messages from unknown people identified as adult were often discussed as unpleasant or ‘creepy’, sexual messaging, role-play, cybersex experiments and discussions related to sex among peers were defined as fun and pleasurable. Girls display notable resilience and describe coping strategies connected to unwanted messaging but equally frame sexual messaging and role-play as issues of choice motivated by curiosity and pleasure. The paper addresses sexual messaging as a form of sexual play and learning, and argues for the importance of contextual analysis in understanding its forms and potentialities.     

‘You shouldn’t be making people feel bad about having sex’: exploring young adults’ perceptions of a sex-positive sexual health text message intervention

Young adults are disproportionately affected by negative sexual health outcomes, such as sexually transmitted infections. One strategy for reducing such negative outcomes involves the use of comprehensive sexual health education. As comprehensive sexual health education programmes are adopted, there is a need to evaluate the messaging approaches that might best connect with young people. Sex-positive approaches, which describe sex as a healthy practice and personal choice, are becoming popular, but whether this strategy works has not been tested from a message design perspective. This study examines the reactions of young adults to sex-positive or sex-negative messages, framed as a gain or loss, designed for a text message-based intervention. Participants quantitatively evaluated 24 messages on their mobile phones. Gain frames were preferred over loss frames, and sex-positive messages were rated as more believable and persuasive. An interaction between the two concepts was also found. Results highlight how sex-positive messages that focus on the benefits of certain behaviours tend to resonate better with young adults. Implications for health educators and practitioners are discussed.     

图书馆短信平台的德育功能研究——以江苏商贸职业学院图书馆为例

对当前图书馆发挥德育功能采取的主要途径与存在的问题进行分析,阐述新形势下通过借助图书馆短信平台,从打造正确的思想宣传阵地、拓宽表达思想交流渠道、开展校园短信文化活动、搭建信息传递桥梁四个方面提高图书馆发挥德育功能的成效.     

Antecedents and consequences of social media fatigue

Prior literature suggests that social media users are increasingly experiencing social media fatigue. Only recently have scholars undertaken empirical studies to investigate its antecedents and outcomes to better understand the impact of fatigue on social media users. To further this understanding, the present study has conducted a cross-sectional survey with 1552 users. The Stress-Strain-Outcome (SSO) theoretical framework is applied to examine if privacy concerns, self-disclosure, parental mediation strategies, and decrement in academic performance due to social media use correlate with social media fatigue. Two forms of fatigue are considered, namely, fatigue due to social networking site (SNS) and mobile instant messaging (MIM) use. The study results suggest that privacy concerns, self-disclosure, parental encouragement and worry significantly and positively correlate with SNS and MIM fatigue. Parental permission and parental monitoring are either not or lowly associated with fatigue. In addition to this, SNS and MIM fatigue positively correlated with the tendency to experience academic decrement due to social media use. The antecedents and consequences of social media fatigue were similar for SNS and MIM users. Moreover, students perceived their parents to be more open to their MIM use, and they had higher self-disclosure in MIM than in SNS. The study concludes with significant implications for practitioners, policy makers as well as service designers.     

Text messaging in the school lives of American high school girls

Digital technologies open new windows for ethnographic explorations of cultural experiences. In this paper, we examine text messaging among academically talented teenage girls of colour at three US urban high schools. Texting introduced a new communication modality into the girls’ lives and created a space for new discourses mediating their participation in school. We draw on the concept of ‘serious play’ to reveal the paradoxical nature of the girls’ texting. At each school, distinct text-messaged discourses emerged – with implications for ethnographic studies of discourse and young people’s commitments to schooling.     

一种基于HTML5的安全跨文档消息传递方案

全面分析现有基于HTML5的跨文档消息机制的安全性,指出其中存在的安全风险,并在此基础上设计和实现了跨文档消息传递方案SafePM.SafePM引入消息安全规则白名单,通过双向检测机制实现对消息收发的完全控制,通过消息内容安全控制机制消除内容中的安全隐患.同时加入自动安全检测以及安全规则隐藏等机制,从而防止消息泄露和篡改,减少跨站脚本执行的风险,实现安全的跨文档消息传递.     

Do instant messaging interruptions help or hinder knowledge workers’ task performance?

The modern workplace environment is filled with interruptions due to the necessity of coworkers to communicate with each other. Studies have revealed that interruptions can impact task performance (TP). Communication interruptions are due, in part, to the unavoidable side-effect of using technology to facilitate these interactions. This experimental case study reports about an investigation we conducted on the role of instant messaging interruptions (IMI) and its implications on knowledge workers’ TP in a workplace environment. We have gathered data from knowledge workers engaged in an e-learning activity. The case study included a total of 60 experimental observations and analysis of the 120 records revealed that the time to complete a task (TPtct) for certain types of tasks, was significantly affected by IMI. This case study addressed gaps in IM interruption research and practical knowledge about the role of instant messages in the organization. Previous research has been conducted in a laboratory environment with interruptions generated by means other than actual IM. This case study used IMI with participants working in their normal workplace. Findings were used to provide a set of lessons learned recommendations for managers when it comes to the use of IM in the workplace.     

Txt msg n school literacy: does texting and knowledge of text abbreviations adversely affect children's literacy attainment?

This paper reports on two studies which investigated the relationship between children's texting behaviour, their knowledge of text abbreviations and their school attainment in written language skills. In Study One, 11–12‐year‐old children provided information on their texting behaviour. They were also asked to translate a standard English sentence into a text message and vice versa. The children's standardised verbal and non‐verbal reasoning scores were also obtained. Children who used their mobiles to send three or more text messages a day had significantly lower scores than children who sent none. However, the children who, when asked to write a text message, showed greater use of text abbreviations (‘textisms’) tended to have better performance on a measure of verbal reasoning ability, which is highly associated with Key Stage 2 (KS2) and 3 English scores. In Study Two, children's performance on writing measures was examined more specifically. Ten to eleven‐year‐old children were asked to complete another English to text message translation exercise. Spelling proficiency was also assessed, and KS2 Writing scores were obtained. Positive correlations between spelling ability and performance on the translation exercise were found, and group‐based comparisons based on the children's writing scores also showed that good writing attainment was associated with greater use of textisms, although the direction of this association is nor clear. Overall, these findings suggest that children's knowledge of textisms is not associated with poor written language outcomes for children in this age range.