Classification of various attacks and their defence mechanism in online social networks: a survey

Due to the popularity and user friendliness of the Internet, numbers of users of online social networks (OSNs) and social media have grown significantly. However, globally utilised, social networks are the consequence of the lack of understanding of secrecy and protection on OSN and media has increased. Secrecy and surety of OSNs need to be inquired from various positions. According to recent studies, OSN users expose their private information such as email address, phone number etc. In this paper, we have presented a high-level classification of recent OSN attacks for recognising the problem and analysing the blow of such attacks on World Wide Web. We have also discussed OSN attacks on different social networking web applications by citing certain recent reports such as Kaspersky security network and Sophos security threat report. We also offer some simple-to-implement user practice tips to protect the system and user’s information. In addition to this, we have discussed a comprehensive analysis of numerous defensive approaches on OSN security. Lastly, based on the acknowledged strength and faults of these defensive approaches, we have explained open research issues.     

A genetic algorithm based approach to transactional and QoS-aware service selection

As there are various risks of failure when Web services are deployed in unreliable environment, the execution of a composite Web service (CWS) requires the transaction mechanism to guarantee its reliable execution. However, the existing service selection approaches consider QoS and transaction separately and have not considered that transactional properties may affect the QoS such as the execution time of a CWS. This work addresses the importance of considering transactional properties and how the transactional properties affect the QoS simultaneously in the process of service selection by a QoS-aware and transactional-aware selection approach. First, a performance evaluation method is proposed to calculate the execution time of a transactional CWS. Then, a genetic algorithm based approach, which takes into account the execution time, price, transactional property and successful execution rate of CWS, is presented to achieve global optimisation service selection. Finally, experimental results show the efficiency and effectiveness of the approach.     

Narrowing the scope of failure prediction using targeted fault load injection

As society becomes more dependent upon computer systems to perform increasingly critical tasks, ensuring that those systems do not fail becomes increasingly important. Many organizations depend heavily on desktop computers for day-to-day operations. Unfortunately, the software that runs on these computers is written by humans and, as such, is still subject to human error and consequent failure. A natural solution is to use statistical machine learning to predict failure. However, since failure is still a relatively rare event, obtaining labelled training data to train these models is not a trivial task. This work presents new simulated fault-inducing loads that extend the focus of traditional fault injection techniques to predict failure in the Microsoft enterprise authentication service and Apache web server. These new fault loads were successful in creating failure conditions that were identifiable using statistical learning methods, with fewer irrelevant faults being created.     

The symbiosis of entities in the social engagement network: The role of social ventures

Social entrepreneurship is increasingly recognized as a mechanism for creating social and economic value. By applying population ecology, resource dependency and resource-based view perspectives, this paper develops a conceptual model to provide greater insight into how social entrepreneurship ventures collaborate with other organizations in a network to fulfill resource requirements. Through this process social ventures address unmet social needs to create value which leads to the development and growth of individuals, communities, and regions. Using a large city's economic development actors involved in small business promotion as test cases, this exploratory study illustrates that social ventures effectively acquire resources from the primary social engagement network actors: corporations, governments, and other social ventures. The framework introduced in the paper provides a means by which to better understand the context in which relevant social engagement players in a network exist and the synergies that they can develop.     

Customization of the online purchase process in electronic retailing and customer satisfaction: An online field study

This paper investigates the customization of the online purchase process in electronic retailing. We conceptualize customization relevant to the two constituent sub-processes in the online purchase process: (i) decision customization—the customization of the information content delivered to customers to help them in the decision-making sub-process; and (ii) transaction customization—the customization of the purchase transaction sub-process for each customer. We draw on and synthesize the theoretical perspectives of Website Usability, Technology Acceptance Model, and Transaction Costs, to triangulate and deduce hypotheses linking customization of the online purchase process in electronic retailing and customer satisfaction. The hypotheses are tested by analyzing: (i) primary data on customization of the online purchase process collected from an online field study involving a direct observation and content analysis of the websites of 422 retailers; and (ii) secondary data on customer satisfaction with the online purchase process for the same set of 422 electronic retailers collected from a publicly available data source. The research method used for the empirical analysis is Multivariate Analyses of Covariance (MANCOVA). The results indicate that decision customization that provides choice assistance by way of personalized product recommendations is positively associated with customer satisfaction with the decision-making sub-process; and transaction customization, oriented towards making the transaction sub-process personal, convenient, and interactive is positively associated with customer satisfaction with the purchase transaction sub-process. Additionally, the results indicate that both decision customization and transaction customization are associated with overall customer satisfaction with the online purchase process of electronic retailers. The contributions, managerial implications, and limitations of the study, and directions for future research are discussed.     

The adoption of Firm-Hosted Online Communities: an empirical investigation into the role of service quality and social interactions

Online communities are a powerful device for collaborative creativity and innovation. Developments in Web 2.0 technologies have given rise to such interactions through firm-hosted online communities (FHOCs) – firm-run online information services that also provide self-help to a community. We devise a model that seeks to explain the factors that encourage people to become members of a FHOC and test the model using structural equation modelling based on data collected from 511 users of a FHOC. The study finds that: (a) an understanding of Perceived Usefulness (PU) plays a mediating role between Behavioural Intention (BI) to adopt FHOC and Trust, as well as Interface design; b) Networking among users has an indirect effect on BI; and c) design of the Interface has a direct influence on BI. A managerial implication is that Networking plays a role in the way supplementary services, including blogs and discussion forums, are perceived. Theoretically, when service quality is decomposed into components such as core services and supplementary services, it also positively influences PU.     

Fifty Years of Classification and Regression Trees

Fifty years have passed since the publication of the first regression tree algorithm. New techniques have added capabilities that far surpass those of the early methods. Modern classification trees can partition the data with linear splits on subsets of variables and fit nearest neighbor, kernel density, and other models in the partitions. Regression trees can fit almost every kind of traditional statistical model, including least‐squares, quantile, logistic, Poisson, and proportional hazards models, as well as models for longitudinal and multiresponse data. Greater availability and affordability of software (much of which is free) have played a significant role in helping the techniques gain acceptance and popularity in the broader scientific community. This article surveys the developments and briefly reviews the key ideas behind some of the major algorithms.     

Nationality,social network and psychological well-being: expatriates in China

Expatriate social networks constitute an under-emphasized area in expatriate literature. The current study contributes to the expatriate adjustment literature by empirically testing the relationship between expatriate personal networks and psychological well-being. The current study also investigates the hypothesis that expatriates from different cultural backgrounds will establish different social networks and adjust differently in China. A survey of 166 expatriates in China from North America, Europe and other countries in Asia showed significant support for the hypothesis that expatriate network characteristics have a direct and significant influence on expatriate psychological well-being. In addition, as predicted, expatriates in China from different cultural backgrounds (Overseas Chinese, other Asian, North American and European) established personal networks with different characteristics.     

网络流量分类研究进展综述及未来发展

文章对现有的网络流量分类方法进行了分析和总结,比较了基于模式匹配和基于机器学习的两大网络流量分类方法的优缺点,并在此基础上提炼出基于机器学习方法的流量分类框架,指出当前网络流量分类方法亟待解决的问题与五大研究方向,为网络流量分类的相关研究提供了参考。     

Application of collective knowledge diffusion in a social network environment

ABSTRACT

We present a group dynamics model that shows knowledge integration as a process occurring over time. As each individual in the group contact others, his own knowledge changes, and over time the collective knowledge is obtained. This allows modeling knowledge diffusion in a social network and while the models presented in this paper are not competitive in that area, they approach the problem from previously unconsidered direction. We test the behavior of the model in a multi-agent simulation and we test a simple advertisement campaign in a social network. We provide discussion of elements needed for making model more competitive.     

Effects of the workplace social context and job content on nurse burnout

Job burnout is a continuing concern for human resource management, as it affects employee productivity and well‐being. In particular, the nursing profession is widely recognized as a stressful occupation that leads to burnout. The present study examines the relative significance of workplace social context in a health care setting and the job content of the nursing profession for influencing the three dimensions of job burnout: emotional exhaustion, depersonalization, and personal accomplishment (Maslach & Jackson, 1981). Data were collected through a questionnaire survey of a random sample of 1,190 nurses working in 43 public hospitals in Hong Kong. The results indicate that although both the workplace social context and job content have significant effects on burnout dimensions, the effects of the workplace social context were significantly stronger. In addition, the workplace social context had a significant negative effect on personal accomplishment, whereas job content influenced personal accomplishment positively. Implications of these findings are discussed in the context of devising management interventions for dealing with job burnout in the nursing profession. © 2011 Wiley Periodicals, Inc.     

The formation and interplay of social capital in crowdfunded social ventures

The multi-levelled processes taking place in Crowdfunding (CF), when tapping a large heterogeneous crowd for resources, and the often fundamentally different intentions of individual crowd members in the case of highly desirable social ventures with little prospect for economic gains, may lead to a different logic and approach to how entrepreneurship develops. Using this under-institutionalized sphere as both, context and subject, the author seeks evidence and a new understanding of entrepreneurial routes by using the sociological perspectives of Bourdieus' four forms of capital as a lens on 36 cases of social ventures. In the cases, opportunity recognition, formation and exploitation could not be distinguished as separate processes. CF and sourcing help form the actual opportunity and disperse information at the same time. In addition, the ‘nexus’ of opportunity and entrepreneur is breached in CF of social causes through the constant exchange of ideas with the crowd, leading to norm-value pairs between the funders and the entrepreneurs. Issues of identification and control are thus not based upon any formal relationship but based on perceived legitimization and offered democratic participation leading to the transformation of social capital (SC) into economic capital (EC). Success is based upon the SC of the entrepreneurial teams, yet the actual resource exchange and transformation into EC is highly moderated by cultural and symbolic capital that is being built up through the process.     

乡镇移民安置与社会网络支持

广义上 ,移民安置不仅包括生产生活的调整和文化整合 ,还暗含着社会关系网络的重建。针对社会关系网络中断后移民所出现的种种社会适应不良 ,本文建议通过发掘个人社会网络资源 ,来实现移民安置的自我解决 ;并构筑社会保障和制度支持网 ,给予移民安置外部支撑     

Structural embeddedness and organizational social outcomes in a centrally governed mental health services network

Abstract

This article is an examination of the effects of network involvement, or structural embeddedness, on three organizationally based social outcomes. Specifically, we argue that in centralized, publicly funded networks an organization's structural embeddedness will be related to its trustworthiness, reputation and influence, as rated by other network members. Results from a network survey of a publicly funded health and human service network generally confirm our hypotheses and suggest additional work on the topic.     

Extrinsic motivation as a determinant of knowledge exchange in sales teams: A social network approach

This paper investigates extrinsic motivation as a determinant of knowledge exchange among employees in sales teams. Applying a social network approach, we study different forms of knowledge-exchange behaviors from the perspective of a focal employee and from the perspective of the dyad. From the focal employees' perspective, we disentangle knowledge seeking from knowledge providing, and argue that these two behaviors are affected differently by employees' extrinsic motivation. From the dyad perspective, we take similarity in motivation of tied-to employees and reciprocity of exchange ties into account. To test our hypotheses, we apply exponential random graph models to data gathered from 138 employees in five different sales teams distributed across three companies in Central Europe. The results of our analysis from the focal employees' perspective show that extrinsically motivated employees generally engage in less knowledge exchange. The dyad perspective further highlights that sales employees proceed purposefully when they exchange knowledge with coworkers. For instance, two employees' relative levels of extrinsic motivation determine their willingness to engage in reciprocal knowledge exchange. We discuss the implications of our findings for research on the microfoundations of organizational knowledge management and draw conclusions concerning HRM practices used to foster extrinsic motivation, thereby affecting knowledge exchange.     

社会多元化与政府转型情境下的规划模式转变——浅析多伦多新型社会规划

面对当前社会日益多元化的发展趋势,以及政府职能调整为社区发展带来的两难困境,加拿大多伦多市在反思传统社会规划模式局限性的基础上,开创性地进行了新型社会规划模式的探索,为我国城市规划领域中社会规划的发展提供了新的思路和启示.     

Approaches and perspectives in social and environmental accounting: an overview of the conceptual landscape

In recent years there has been a marked resurgence of interest in the areas of corporate social responsibility (CSR) and social and environmental accounting (SEA) among business, governments, public policymakers, investors, unions, environmentalists and others. While at one level there appears to be widespread agreement that CSR and SEA are worthy topics of attention, different groups have very different understandings of these fields. This article provides an analysis of these differences by comparing three broad approaches to SEA: the business case, stakeholder‐accountability and critical theory approaches. It also responds to concerns a number of commentators have expressed regarding the current dominance of ‘business case’ perspectives. While not seeking to impose on readers a ‘correct’ way of viewing SEA and CSR, exposure to competing perspectives is viewed as one way of challenging us to think more reflectively about the frames available to us and their implications for the social realities we construct, embed or seek to change. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment.     

The networking practices of women managers in an emerging economy setting: negotiating institutional and social barriers

Women managers face institutional and social barriers throughout their careers. In this research, we use networking and symbolic interactionism theories to explain how they network while negotiating these impediments in an emerging economy setting. Focus‐group data revealed three themes. The women in our study, as predicted by networking theory, use networks to bolster career outcomes, although some also use non‐influential networks or network ineffectively. Next, symbolic interactionism explains how expectations of, and personal reflections on, networking lead to a lack of confidence and feelings of guilt that can be career limiting. However, when women understand that their unique networking approach can be powerful, they gain social capital that enhances their leadership. Last, patriarchal cultures of emerging economy settings support stereotypical gender roles, leaving women conflicted between competition and mutual support, thus redefining the so‐called Queen Bee phenomenon. We conclude by showing how women can use networking to enhance career and personal development.     

我国企业社会责任缺失的风险及防范

文章指出,我国目前已经成为全球制造基地,企业能否认真履行企业社会责任,对我国大部分企业的经营和出口带来巨大影响。企业社会责任的缺失,将会引起资源利用效率低、环境破坏、供应链订单丢失、公司持续发展动力不足、人才流失等方面的风险。文章认为必须从政府立法、企业、员工、社会舆论等方面构建防范风险的体系。     

西方城市社会地理学主要理论及研究的意义——基于空间思想的分析

回顾了西方城市社会地理学研究发展的历程,从马克思主义学派的新马克思主义、新韦伯主义,到吉登斯结构理论、后现代主义再到女性主义理论研究,对西方城市社会地理学七十年代以来的研究进展进行了综述.最后就城市社会地理学在中国的研究意义进行了探讨.