Attack vector analysis and privacy-preserving social network data publishing

This paper addresses the problem of privacy-preserving data publishing for social network. Research on protecting the privacy of individuals and the confidentiality of data in social network has recently been receiving increasing attention. Privacy is an important issue when one wants to make use of data that involves individuals' sensitive information, especially in a time when data collection is becoming easier and sophisticated data mining techniques are becoming more efficient. In this paper, we discuss various privacy attack vectors on social networks. We present algorithms that sanitize data to make it safe for release while preserving useful information, and discuss ways of analyzing the sanitized data. This study provides a summary of the current state-of-the-art, based on which we expect to see advances in social networks data publishing for years to come.

Privacy threat analysis of social network data

Social network data has been increasingly made publicly available and analyzed in a wide spectrum of application domains. The practice of publishing social network data has brought privacy concerns to the front. Serious concerns on privacy protection in social networks have been raised in recent years. Realization of the promise of social networks data requires addressing these concerns. This paper considers the privacy disclosure in social network data publishing. In this paper, we present a systematic analysis of the various risks to privacy in publishing of social network data. We identify various attacks that can be used to reveal private information from social network data. This information is useful for developing practical countermeasures against the privacy attacks.

Web 2.0 virtual design studio : social networking as facilitator of design education

In 2009, Deakin University and the Chinese University of Hong Kong trailed the use of Web 2.0 technologies to enhance learning outcomes in a third-year architectural design studio that was modelled on the virtual design studios (VDSs) of the past decades. The studio developed the VDS further by integrating a social learning environment into the blended learning experience. The Web 2.0 VDS utilized the social networking site Ning.com, YouTube, Skype and various three-dimensional modelling, video and image processing, and chat software to deliver lectures, communicate learning goals, disseminate learning resources, submitting, providing feedback and comments to various design works, and assessing of students’ outcomes. This research centres on issues of learning and teaching associated with the development of a social network VDS.

Are children's perceptions of neighbourhood social environments associated with their walking and physical activity?

This study aimed to examine cross-sectional associations between neighbourhood social environmental factors and physical activity (PA) among Australian primary school children. Baseline data from a large-scale trial among 957 children (48% boys) aged 9–12 years were utilised. Children self-reported their perceptions of the neighbourhood social environment including social networks (e.g. there are lots of other children around to play with), and social capital (e.g. there are lots of people in my area I could go to if I need help). Children also self-reported their weekly walking frequency and PA from which average daily moderate to vigorous PA (MVPA) was calculated. Linear regression analyses examined these associations. Boys performed 17 min/day more MVPA than girls (p < 0.01), and girls performed one extra trip/week than boys (p < 0.001). Children’s perceptions of social capital (p < 0.0001) and social networks (p < 0.01) were both positively associated with MVPA and social capital was positively associated with walking frequency (p < 0.05). These associations were not moderated by the child’s sex. These findings suggest that children who had positive perceptions of neighbourhood social capital and social networks in the neighbourhood, tended to be more physically active. Longitudinal and experimental studies are required to further test the influence of these factors among children.

The neighborhood social environment and body mass index among youth : a mediation analysis

Background

This study aimed to examine associations between aspects of the neighborhood social environment and body mass index (BMI) in youth both cross-sectionally and prospectively; and whether this association was mediated by physical activity, screen-time and sedentary time.
Methods

Data were collected in 2004 and 2006 in high and low socio-economic areas of Melbourne, Australia. In 2004, 185 children aged 8-9 years (47% boys) and 359 children aged 13-15 years (45% boys) participated. Parents reported their perceptions of aspects of the social environment (i.e. social networks and social trust/cohesion), and physical activity (i.e. time spent outdoors by their children; and their younger children's walking and cycling trips) and screen-time (i.e. TV viewing, computer use). The older children self-reported their walking and cycling trips and their screen-time. All children wore an accelerometer to objectively assess outside-school hours moderate- to-vigorous physical activity and sedentary time. BMI was calculated from height and weight measured in 2004 and 2006. Multilevel linear regression analyses were conducted to examine associations between the social environment and BMI. Mediation analyses using the products of coefficient method were conducted to determine whether associations between the social environment and BMI were mediated by the time spent in a range of physical activity and sedentary behaviors.
Results

Cross-sectional and prospective regression analyses showed that a more positive social network and higher social trust/cohesion was related to lower BMI among children. There was no evidence that time spent in physical activity or sedentary behaviors mediated this relation, despite significant associations between social networks and screen-time and between screen-time and BMI.
Conclusions

The findings suggest that the neighborhood social environment may be important for preventing overweight and obesity in children. Further research investigating the mechanisms through which the neighborhood social environment exerts its effect on BMI is needed.

How social is the virtual design studio? A case study of a third year design studio

With the advent of social networks, it became apparent that the social aspect of designing and learning plays a crucial role in students’ education. Technologies and skills are the base on which learners interact. The ease of communication, leadership opportunity, democratic interaction, teamwork, and the sense of community are some of the aspects that are now in the centre of design interaction. The paper examines Virtual Design Studios (VDS) that used media-rich platforms and analyses the influence the social aspect plays in solving all problems on the sample of a design studio at Deakin University. It studies the effectiveness of the generated social intelligence and explores the facilitation of students’ self-directed learning. Hereby the paper studies the construction of knowledge via social interaction and how blended learning environments foster motivation and information exchange. It presents its finding based on VDS that were held over the past three years.

Adoption of social media in Victorian local governments

The use of the Internet and social media tools by Australians has increased significantly over the last five years. Social media tools provide local governments with the opportunity to inform, serve and interact with their constituents on a level not previously possible. This paper uses a mixed method approach to firstly review current use of social media tools by Victorian local governments and secondly interview elected officials and administrators of four Victorian local councils about barriers to the adoption of social media tools. The results show that while 59 Victorian local governments (74%) are utilizing at least one social media tool, there are 20 councils (25%) that still do not utilize social media tools. The interviews indicate that the main barriers hindering social media implementations are: uncertainty, fear of risk, lack of knowledge and experience, lack of resources, lack of trust and, the culture of government. The main contribution of this study is a review of the current level of adoption of social media tools by Victorian local governments and identifies a number of barriers that prevent local government from fully utilizing the advantages of social media tools. Currently most Victorian local governments use social media to disseminate information.

The online identity : towards a hermeneutic phenomenological approach

In order to better understand how artists working in countercultural or ‘fringe’ creative practice use social media to create online persona I am using a hermeneutic phenomenological approach to investigate the lived experience of both online and offline persona creation by tattoo artists, street artists, craftivists, and slam poets. The use of phenomenology to investigate artists’ lived experience is particularly appropriate, as ‘artists are involved in giving shape to their lived experience, the products of art are, in a sense, lived experienced transformed into transcended configurations’ (Van Manen 2006: 74). This paper will outline the methodological underpinnings of this project, using these underpinnings to explore the benefits offered by phenomenology to internet studies.

Understanding how people use online social media sites to construct personas can benefit greatly from understanding the lived experience of those who use these technologies, the decisions they make in persona construction, and the online/offline, public/private continuums. A phenomenological approach ‘seeks to revel and richly portray the nature of human phenomena and the experiences of those who live through them’ (Grace & Ajjawi 2010: 197) and offers both the researchers and the participants a way to interrogate and interpret the experience of constructing online personas. A phenomenological approach allows for ‘an intimate awareness and deep understanding’ (Saldana, Leavy & Bertvas 2011: 8) of the experience of persona construction in online and offline spaces, and could equally be used to interrogate other aspects of internet use. 

Trust evaluation for indirectly connected nodes using link community information

Inspired by recent empirical research on link communities, we borrow some important ideas and concepts for our own research to provide a more reasonable computation model of transitive trust. The key advantages of using link community methodology is to reflect on the nature of the social network features of Hierarchy and Overlap. Our research mainly resolves the computation of trust transitivity in which two nodes do not have any direct links to any link community. In this research, we discover a new direction analyzing trust transitivity. By using a social network game, we found that the link community methodology is a natural way to analyze trust in social networks. We also discovered, even in a small social network, trust has certain community features.

Social capital framework in the adoption of e-learning

This is a study of the influence of social and cultural factors on the adoption of e-­learning in higher education in Malaysia, Indonesia, Turkey, Singapore and Australia. Particular attention in each case was given to factors relating to social capital, attitudes and patterns of behavior in leadership, entrepreneurialism, and teaching and to broader sets of attitudes that shape general outlook. A case study approach was chosen in order to enable a richer and more finely grained analysis of the issues. The case studies are based on semi-­structured interviews and observations conducted over several years. This research shows that previously known factors that affect the adoption of e-­learning in higher education, namely, policy, guidelines, paradigm shifts and pedagogical change, are also significant in the contexts of each of the case studies in this research. However, this research shows that the adoption and uptake of e-­learning technologies is also strongly shaped by cultural and social factors but not in ways that might first have been expected. It is not so much that there are specific cultural and social factors relating to specific e-­learning technologies, but rather, that the degree of uptake of these technologies depends on teachers being encouraged, guided and assisted to innovate and adopt new technology. This can only occur when there is sufficient social capital, mediated through appropriate social networks, to build trust, overcome objections and anxieties, and generally motivate staff to engage in challenging, time-­consuming initiatives in e-­learning that generally do not promise immediate rewards.

Certain culture-­based issues emerged as important. These included staff mentoring, clustering through ‘bamboo networking’, trust-­building and overcoming fear of ‘losing face’ (kiasu), facilitating women to take the initiative and lead, developing sensitivity to cultural differences, encouraging entrepreneurialism and rewarding pioneering endeavours, all of which were present in varying degrees across all five case studies. There were subtle variations on a central theme, which was clearly that of the impact of social capital as a driver. It was social capital played out through personal relationships and social networks that most strongly influenced individual teachers to be sufficiently motivated to add to an already busy schedule by taking on the additional burdens of pioneering e-­learning technology and it was those social relationships that provided guidance and ongoing encouragement. As a consequence of these findings, this study offers a social capital model of e-­learning adoption, which suggests that the adoption and uptake of e-­learning technologies is strongly shaped by cultural and social factors.

The role of social support in families coping with childhood brain tumor

Previous studies suggest that support from social networks is a protective factor buffering the negative effects of stressful events, such as having a child with a chronic illness. The literature highlights the need for more systematic examination of parents’ social support networks across the disease trajectory, to obtain a more complete understanding of how a family's support system affects adjustment over time. This was attempted in this study of 88 parents of children with brain tumors, recruited from hospitals in Australia, Singapore, and New Zealand. It employed a longitudinal design, tracking families for 2 years postdiagnosis to examine the relationship between social support and coping. As in previous research this study showed that different types of support are needed at different stages in the illness trajectory. The study also identified the use of various coping strategies by families, directed at the maintenance and enhancement of existing supports and the securing of new supports. The study failed to establish a statistically significant relationship between level of coping and social support, however, suggesting that parents were using primarily “internal” familial modes of coping, including preexisting patterns of coping, with external social support being an adjunct to their coping rather than being a major contributor.

Using social network analysis to identify key child care center staff for obesity prevention interventions: a pilot study

Introduction. Interest has grown in how systems thinking could be used in obesity prevention. Relationships between key actors, represented by social networks, are an important focus for considering intervention in systems. Method. Two long day care centers were selected in which previous obesity prevention programs had been implemented. Measures showed ways in which physical activity and dietary policy are conversations and actions transacted through social networks (interrelationships) within centers, via an eight item closed-ended social network questionnaire. Questionnaire data were collected from (17/20; response rate 85%) long day care center staff. Social network density and centrality statistics were calculated, using UCINET social network software, to examine the role of networks in obesity prevention. Results. “Degree” (influence) and “betweeness” (gatekeeper) centrality measures of staff inter-relationships about physical activity, dietary, and policy information identified key players in each center. Network density was similar and high on some relationship networks in both centers but markedly different in others, suggesting that the network tool identified unique center social dynamics. These differences could potentially be the focus of future team capacity building. Conclusion. Social network analysis is a feasible and useful method to identify existing obesity prevention networks and key personnel in long day care centers.

Remix the social: remix the learning

This paper reports on how the findings from an eighteen month secondary school action research study, in which social media was integrated into face-to-face classroom practice, was used to inform a fourth year undergraduate teacher-education unit at Deakin University in Australia. The school action research study was conducted in an Australian public secondary school. Students were aged between 13 and 16 years of age and a total of thirteen classes were involved. In each of the three semesters of data collection, one online social network was shared with up to seven classes and each class had approximately 25 students. Blogs, Groups, Chats, Discussion Forums, Web 2.0 tools and a wide range of student-generated content were shared online, within a class and between classes. Students were encouraged to interact and to share their thoughts and ideas about planning as well as using their out-of-school skills and knowledge. Each topic, within each class, was one action research cycle, using Armstrong and Moore’s (2004) framework. By following Graham Nuthall’s lens on learning, the researcher was able to focus on teaching as being about sensitivity and adaptation: adjusting to the here-and-now circumstances of particular students (Nuthall 2007). Elements of self organisation with spontaneous and strange attractors were identified throughout the study and these made links to Doll’s (1993) post-modern perspective of chaotic behaviour and the complexity of Hayles’ (1990) ‘disorderly order’.