用户属性感知的移动社交网络边缘缓存机制

针对数据流量爆发式增长所引发的网络拥塞、用户体验质量恶化等问题,提出一种用户属性感知的边缘缓存机制。首先,利用隐语义模型获知用户对各类内容的兴趣度,进而估计本地流行内容,然后微基站将预测的本地流行内容协作缓存,并根据用户偏好的变化,将之实时更新。为进一步减少传输时延,根据用户偏好构建兴趣社区,在兴趣社区中基于用户的缓存意愿和缓存能力,选择合适的缓存用户缓存目标内容并分享给普通用户。结果表明,所提机制性能优于随机缓存及最流行内容缓存算法,在提高缓存命中率、降低传输时延的同时,增强了用户体验质量。      

企业网络隔离方案探讨

分析威胁网络安全的主要因素及网络隔离对网络风险的防范作用。根据几种网络隔离技术的特点和企业网的应用需求，提出企业网中3个典型网络边界上的网络隔离方案，展望网闸隔离技术在企业网中的应用前景。     

大学生社交焦虑的主观应对策略

社交焦虑是大学生社交障碍的主要表现之一,对他们的正常人际交往有很多负面影响。研究发现,影响大学生社交焦虑的因素既有客观的,也有主观的。作为大学生,很有必要学会从主观上降低乃至消除社交焦虑的影响,以建立和谐的人际关系。调整认知,这是解决问题的根本。放松心态,积极应对,这是成功的保障。     

职校生人际沟通和社交礼仪的浅析

由于种种原因,职业学校学生(以下简称"职校生")不仅在学习上成绩欠佳,而且在思想上对自己要求也不严,礼仪素养较差.所以,加强对职校生的礼仪教育是当前职业学校德育工作的一项重要内容.     

网络环境中的著作权保护初探

随着互联网和数字技术的飞速发展,越来越多的作品通过网络传播,网络衍生的法律问题直接挑战着传统的著作权法律制度,现行著作权法律在网络环境下出现了真空地带,网络环境中的侵犯著作权情况层出不穷.基于此,本文试从以下几个方面探析网络环境中的著作权保护难题.     

ERP网络架构与安全分析

随着ERP系统的不断发展和运用,系统面临的安全威胁也越来越多。我们必须提高安全认识,尽量减少核心数据被窃取、篡改,满足企业越来越高的安全需求。我们通过对ERP网络架构和网络安全威胁进行深入分析,为企业为用户提出增强ERP系统安全性的可行性方案。     

网络信息服务的个性化发展

随着网络信息技术的发展和用户对服务要求的提高，按照个人需求的不同实现个性化服务是网络信息服务的发展趋势，也是网络信息服务向纵深发展的一个重要内容。阐述了网络环境下网络信息服务个性化的主要服务模式。     

一种用于设备监测的高效无线传感器网络多跳同步时分协议

基于冶金企业设备监测的背景提出了一种无线传感器网络多跳同步时分协议.该协议采用自组织的层次拓扑控制方式,以簇头构成系统的骨干网,通过可靠路由方式传输数据.簇内节点组成局部网络以较小的发射功率采用分时多跳的方式将数据传输到距离较远的簇头,通过同步休眠机制降低功耗、满足传输时延要求.在冶金企业实际设备监测系统中的应用表明该协议具有扩展性强、传输可靠、信号延迟小和功耗低等特点.     

网络信息安全管理的解决方案

网络信息安全在当今社会、经济、政治生活越来越显重要、大到国家安全,小到单位反个人知识产权都有所涉及.本文从保密工作的管理角度探讨网络信息安全的存在问题,并在此基础上提出了相应的网络信息安全解决方案,针对当今信息安全新发展的模式提出个人的几点思考.     

The relationship between level of disability, psychological problems, social activity, and social networks.

Objective: To test a theoretical model on the relationship between level of disability, psychological problems, social activity, and social networks. Study Design: A repeated cross-sectional study included in 2 representative studies in the general population in Norway. Structural equation modeling was applied to test different models. Results: Activity limitations contribute to the prediction of psychological problems and level of social activity over time, whereas the reverse effects were not demonstrated. However, cross-sectional associations between psychosocial variables and activity limitations were found. Conclusions: The study confirms that activity limitations predict level of psychosocial problems. Although the reverse longitudinal effect from psychosocial problems on activity limitations was not demonstrated, short-term effects cannot be ruled out with the current study design. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Cognitive constraints on the structure and dynamics of social networks.

Everyday social activities take place within an environment peopled by a specific set of individuals (our social network). The author reviews the evidence that our social world is both limited in size and highly structured. This structuring consists of a series of circles of acquaintanceship, the successive layers of which progressively include more individuals with whom we have less intense relationships. Although these layers have very consistent typical sizes, there is considerable individual variation because of individual differences in gender, personality, and social-cognitive abilities. The author considers some of the implications of these structural components for the way in which we organize our social lives. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Why would social networks be linked to affect and health practices?

Objective: To examine the relation among social integration (SI), affect, and smoking and alcohol consumption. Design: The authors administered social network and psychological questionnaires to 193 adults and then interviewed them on 14 consecutive evenings about their daily social interactions, affect, and smoking and alcohol consumption. Main outcome measures: The main outcome measures were positive and negative affect, smoking, and alcohol consumption. Results: Between-subjects analyses found that those with more diverse social networks (high in SI) interacted with more people and smoked and drank less. SI was not, however, associated with affect. In contrast, within-subject analyses found that the more people participants interacted with during a day, the greater their positive affect, drinking, and smoking on that day. However, this occurred primarily for persons low in SI. High-SI persons reported high positive affect irrespective of the number of people with whom they interacted, and their smoking and drinking behaviors were less influenced by number of interactants. Conclusion: SI may alter health because it affects responsiveness to the social influences of others. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Dynamical evolutionary psychology: Individual decision rules and emergent social norms.

A new theory integrating evolutionary and dynamical approaches is proposed. Following evolutionary models, psychological mechanisms are conceived as conditional decision rules designed to address fundamental problems confronted by human ancestors, with qualitatively different decision rules serving different problem domains and individual differences in decision rules as a function of adaptive and random variation. Following dynamical models, decision mechanisms within individuals are assumed to unfold in dynamic interplay with decision mechanisms of others in social networks. Decision mechanisms in different domains have different dynamic outcomes and lead to different sociospatial geometries. Three series of simulations examining trade-offs in cooperation and mating decisions illustrate how individual decision mechanisms and group dynamics mutually constrain one another, and offer insights about gene-culture interactions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Using technology to explore social networks and mechanisms underlying peer effects in classrooms.

Peer interactions among children have long interested social scientists. Identifying causal peer effects is difficult, and a number of studies have used random assignment to produce evidence that peers affect each other's outcomes. This focus by sociologists and economists on whether peers affect each other has not been matched by direct evidence on how these effects operate. The authors argue that one reason for the small number of studies in sociology and economics on the mechanisms underlying peer effects is the difficulty of collecting data on microinteractions. They argue technology reduces data collection costs relative to direct observation and allows for realistic school activities with randomly assigned peers. The authors describe a novel strategy for collecting data on peer interactions and discuss how this approach might shed light on mechanisms underlying peer influence. The centerpiece of this strategy is the use of handheld computers by middle and high school students as part of interactive math and science lessons called the Discussion Game. The handhelds collect data on interactions between students and track how students' answers evolve as they interact with different peers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Real and perceived attitude agreement in social networks.

It is often asserted that friends and acquaintances have more similar beliefs and attitudes than do strangers; yet empirical studies disagree over exactly how much diversity of opinion exists within local social networks and, relatedly, how much awareness individuals have of their neighbors' views. This article reports results from a network survey, conducted on the Facebook social networking platform, in which participants were asked about their own political attitudes, as well as their beliefs about their friends' attitudes. Although considerable attitude similarity exists among friends, the results show that friends disagree more than they think they do. In particular, friends are typically unaware of their disagreements, even when they say they discuss the topic, suggesting that discussion is not the primary means by which friends infer each other's views on particular issues. Rather, it appears that respondents infer opinions in part by relying on stereotypes of their friends and in part by projecting their own views. The resulting gap between real and perceived agreement may have implications for the dynamics of political polarization and theories of social influence in general. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Integration of social and utilitarian factors in decision making.

Decision making is influenced by social cues, but there is little understanding of how social information interacts with other cues that determine decisions. To address this quantitatively, participants were asked to learn which of two faces was associated with a higher probability of reward. They were repeatedly presented with two faces, each with a different, unknown probability of reward, and participants attempted to maximize gains by selecting the face that was most often rewarded. Both faces had the same identity, but one face had a happy expression and the other had either an angry or a sad expression. Ideal observer models predict that the facial expressions should not affect the decision-making process. Our results however showed that participants had a prior disposition to select the happy face when it was paired with the angry but not the sad face and overweighted the positive outcomes associated with happy faces and underweighted positive outcomes associated with either angry or sad faces. Nevertheless, participants also integrated the feedback information. As such, their decisions were a composite of social and utilitarian factors. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

If you can't join them, beat them: Effects of social exclusion on aggressive behavior.

Social exclusion was manipulated by telling people that they would end up alone later in life or that other participants had rejected them. These manipulations caused participants to behave more aggressively. Excluded people issued a more negative job evaluation against someone who insulted them (Experiments 1 and 2). Excluded people also blasted a target with higher levels of aversive noise both when the target had insulted them (Experiment 4) and when the target was a neutral person and no interaction had occurred (Experiment 5). However, excluded people were not more aggressive toward someone who issued praise (Experiment 3). These responses were specific to social exclusion (as opposed to other misfortunes) and were not mediated by emotion. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The impact of depression on social economic decision making.

[Correction Notice: An erratum for this article was reported in Vol 119(3) of Journal of Abnormal Psychology (see record 2010-15289-020). In the article, the last revision received date printed on the final page of the article was incorrect due to an error in the production process. The correct publication dates are as follows: Received April 14, 2009; Revision received November 6, 2009; Accepted November 9, 2009.] Although the role of emotion in social economic decision making has been increasingly recognized, the impact of mood disorders, such as depression, on such decisions has been surprisingly neglected. To address this gap, 15 depressed and 23 nondepressed individuals completed a well-known economic task, in which they had to accept or reject monetary offers from other players. Although depressed individuals reported a more negative emotional reaction to unfair offers, they accepted significantly more of these offers than did controls. A positive relationship was observed in the depressed group, but not in controls, between acceptance rates of unfair offers and resting cardiac vagal control, a physiological index of emotion regulation capacity. The discrepancy between depressed individuals' increased emotional reactions to unfair offers and their decisions to accept more of these offers contrasts with recent findings that negative mood in nondepressed individuals can lead to lower acceptance rates. This suggests distinct biasing processes in depression, which may be related to higher reliance on regulating negative emotion. (PsycINFO Database Record (c) 2010 APA, all rights reserved)