Objective: The purpose of this pilot study was to examine the effect of an online social network used as an adjunct to a behavioral weight loss intervention on participants’ perceived social support and perceived self-efficacy using constructs of Social Cognitive Theory as a basis for website development. Methods: 13 adult women (mean age: 43 years of age, range: 25-63 years) participated in a 12-week behavioral weight-loss intervention with the option to access the Transformation Challenge Online Community (TCOC), an internet-based support and informational website. The TCOC was developed using constructs of the Social Cognitive Theory. Data analyzed included online site usage software and pre- and post-questionnaire results. Time spent online, unique visits to the webpage, and pre and post-intervention data were analyzed using a mixed methods approach. Results: Average time spent on TCOC was 95.6 minutes over the entire three month intervention (range: 0 – 287 minutes). Website usage varied widely ranging from a participant who never accessed the site to another participant who logged on daily and commented a total of 27 times. Perceived self-efficacy to maintain a learned health behavior without the aid of a professional, as well as overall perceived social support were statistically significantly greater post-intervention. Confidence in the TCOC’s ability to aid in making healthy lifestyle changes decreased significantly from pre- to post-intervention while website usage also decreased over time. Conclusions: The internet may be a valuable tool for improving perceptions of social support and increasing access to reliable information and education. A web-based intervention can be used as an adjunct to a face-to-face intervention to provide additional support and information, as well as used to reach groups who may not have access to a face-to-face option. Considerations should be given to the structure of the online program; the potential for dynamic, aesthetically pleasing self-regulation tools; and content that is tailored to the individual. Decreased usage of the website over time may reflect similar difficulties in maintaining participation in face-to-face weight loss interventions. Attention should also be given to the target audience as participant comfort levels and feelings towards using the internet may differ significantly between users and therefore impact outcomes.

Collaborative innovation is an important mechanism for firms to exchange and acquire external knowledge. Through collaboration, innovators convene and form networks that, in return, help overcome the boundaries of knowledge transfer. To have a better understanding of actors’ collaborating behaviours in innovation networks, we identify three pairs of roles: 1) do actors make connections or bonds with their partners? 2) do actors exchange their knowledge with internal or external partners? 3) do actors absorb or distribute knowledge? We examine the distribution and evolution of actors’ roles from these three perspectives by using social network analysis. In this thesis, we use thousands of patent data from the United States Patent and Trademark Office, to investigate the actors’ behaviours in the chemical industries of two Canadian regions, i.e. Montreal and Windsor-Sarnia. Based on the results of our analysis, Montreal, acting as a public-dominated region, shows a more complex distribution of roles, while Windsor-Sarnia with a private orientation indicates a simplex pattern. From the evolution perspective, the network of Montreal is more stable and diversified, with key actors being active in the local network for more extended periods. Unlike Montreal, Windsor-Sarnia faces a higher level of mobility and globalization.

Epidemiological models are used to inform health policy on issues such as target vaccination levels, comparing quarantine options and estimating the eventual size of an epidemic. Models that incorporate some elements of the social network structure are used for diseases where close contact is required for transmission. The motivation of this research is to extend epidemic models to include the relationship with a broader set of relevant real world network properties. The impact of degree distribution by itself is reasonably well understood, but studies with assortativity or clustering are limited and none examine their interaction. To evaluate the impact of these properties, I simulate epidemics on networks with a range of property values. However, a suitable algorithm to generate the networks is not available in the literature. There are thus two research aspects: generating networks with relevant properties, and estimating the impact of social network structure on epidemic behaviour. Firstly, I introduce a flexible network generation algorithm that can independently control degree distribution, clustering coefficient and degree assortativity. Results show that the algorithm is able to generate networks with properties that are close to those targeted. Secondly, I fit models that account for the relationship between network properties and epidemic behaviour. Using results from a large number of epidemic simulations over networks with a range of properties, regression models are fitted to estimate the separate and joint effect of the identified social network properties on the probability of an epidemic occurring and the basic reproduction ratio. The latter is a key epidemic parameter that represents the number of people infected by a typical initial infected person in a population. Results show that social network properties have a significant influence on epidemic behaviour within the property space investigated. Ignoring the differences between social networks can lead to substantial errors when estimating the basic reproduction ratio from an epidemic and then applying the estimate to a different social network. In turn, these errors could lead to failure in public health programs that rely on such estimates.

<p>Forskning visar att ungdomar verkar må allt sämre. Undersökningen testade eventuella samband mellan ungdomars stödnätverk och deras känsla av sammanhang (KASAM), språk/kulturs påverkan på dessa faktorer, samt vad som är viktigt hos en stödperson. Enkätfrågor om det sociala nätverket, för att fastställa KASAM samt om vem man vänder sig till i olika situationer besvarades av 147 gymnasieungdomar från Mälardalen. Positivt samband mellan KASAM och ungdomarnas stödnätverk påvisades. Ungdomarna vände sig främst till familjen vid behov av stöd, men kompisar var också viktiga, speciellt för tjejer. Det viktigaste hos en stödperson var att lyssna, vara förstående, finna lösningar, att den känner individen, samt att den är snäll. Tidigare forskning verkar kunna befästas - att ungdomar med ett starkt stödnätverk mår bättre.</p>

This study addressed user perceptions of social network websites and music content based on uses and gratification. This method helped to analyze social network websites as a mass media channel and determine how websites were used by participants. Interviews for this research were conducted via online instant messenger tools including 23 participants from the Republic of Korea and the U.S. who were currently using MySpace and Cyworld via MySpace IM with Skype and NateOn messenger. All semi-structured in-depth interviews were conducted in English. The results centered on three main themes: (1) Benefits of using social network websites, (2) benefits of using music content on social network websites, and (3) motivations to purchase music content on social network websites. General implications of utilizing personal websites were discussed based on these results.

This study deals with long distance migration together with the importance of social networks and geographical preferences for the choice of destination when moving. Thus, the main purpose of this study is to analyze and specify the importance of the mover's social contacts when choosing a new place-of residence. In this connection, the social contents of the destination are chiefly focused. It has also been of interest to estimate in what degree these social contents have influenced this choice of destination by the individual. The differences in quality, intensity, dispersion and direction of social contacts is essential for explaining destination decisions. The basic hypothesis claims that the existence of social networks influences the individual's inclination to move and the choice ofplace-of-residence. In this study, empirical material is used, and its base is 2500 "movers" and a group of "stayers" of equal size. Data from public registers as well as data from inquiries have been used as empirical material. Far away moving is defined as moving across the communal boundaries. The examination of the empirical facts provides input paramétrés for a model, where a number of factors might explain the destination. The model work is implemented in three stages. In the multiple regression model, the impact of a number of variables is estimated. In the logistical regression model the probability of moving into a 'network commune' is estimated, i.e., moving to a commune where there are social contacts. In a third stage, the same variables are tested in a multi-nominal model. Strictly empirically, this study reveals, that there is evidence that the social networks influence the choice of destination when moving. Equally important, perhaps is to find out how strong an impact these networks have. Moving to a geographically and socially recognizable place is possibly regarded as having a more positive impact than the structure of the labour market. It can be stated that, in spite of the widespread migration within post-war Sweden, most people maintain some sort of social and geographical relation to the place where they grew up. The increased mobility per se has also implied that the individual, spatial and social contacts have become more widely spread. The place where one grew up is central and could be said to represent the place where there are many social contacts and the place you always refer to. Social contacts connected to relatives constitute one of the most important single factors. Previous place-of-residence is undoubtedly the most important single factor. Migration to a place of previous residence also implies that there already exists a social network. The access to a holiday cottage and the location of this cottage proves to have a great impact on destination- decisions. Many people simply move to the commune, where they own, or have access to, a holiday cottage. Of several plausible explanations two seem to be relevant. One concerns moving into former cottages, for year round residence, the other implies that the cottage could be regarded as the tangible link to the former home area. If there is no possibility of staying on in one's home area, the cottage represents a link to the past. / digitalisering@umu

Forskning visar att ungdomar verkar må allt sämre. Undersökningen testade eventuella samband mellan ungdomars stödnätverk och deras känsla av sammanhang (KASAM), språk/kulturs påverkan på dessa faktorer, samt vad som är viktigt hos en stödperson. Enkätfrågor om det sociala nätverket, för att fastställa KASAM samt om vem man vänder sig till i olika situationer besvarades av 147 gymnasieungdomar från Mälardalen. Positivt samband mellan KASAM och ungdomarnas stödnätverk påvisades. Ungdomarna vände sig främst till familjen vid behov av stöd, men kompisar var också viktiga, speciellt för tjejer. Det viktigaste hos en stödperson var att lyssna, vara förstående, finna lösningar, att den känner individen, samt att den är snäll. Tidigare forskning verkar kunna befästas - att ungdomar med ett starkt stödnätverk mår bättre.

In recent years, the expansion of urban area and advances in business and technology have brought about transformation in modern society, democratic reforms and impacts on globalization. At the same time,¡@they also have brought tension upon the society. The interaction and connections between people has distanced with developments in the society, and have created a lack of interest in public affairs and social agenda. In addition, due to lack of government resources,¡@needs of the multitude could not be satisfied. It is thus necessary, through organized mobilization of social forces, to recall public interests in public affairs. Since the martial law lifted in 1987, the public has regained the freedom to organize and associate. Numerous private associations have shot out , particularly non-profit organizations. Due to their ¡§not for profit ¡¨ characteristic, and focus on the welfare of the community, it is effective in motivating participation and devotion. It thus is able to demonstrate the richest vitality of the society and is one of the most important models of civilian participation on community. The objective of this study is to investigate the influences of non-profit organiza- tions building social network on community development. Tree and Trees Community Empowerment Association of Kaohsiung City was the focus of this case study. Through literature review, in-depth interview and observation, an understanding of how non-profit organizations operate through the society has been gained. It has further established how non-profit organizations tap external resources and revitalize community resources to construct a perpetual community life. It is hoped from the study that effective recommendations could be made for other community organizations seeking development. The results of the study are: 1. Social network of the leader: From the organization structure of the association, whether in decision-making, execution and financial support, the more involvement of the community, and participation of core members, the more influences on community events it will have when the network of members is considerable. 2. Autonomous operation: An important criterion of non-profit organization autonomy is financial independence. In addition to donations, the association acquires financial resources by their specialty. This allows the association to operate independently without restriction, not as found in other community development association. 3. Public participation: Community development will go nowhere without human resources. In the process of re- constructing the Kaohsiung Original Botanical Garden, though gaining substantial support from community inhabitants, there are still some who hold cold attitude. Furthermore, civilian interest in public affair is mostly limited to their benefits. There is much more human resource in the community that remains undeveloped and unutilized. This is a common problem faced by non-profit organizations in Taiwan .

With more and more images being uploaded to social networks each day, the resources for identifying a large portion of the world are available. However the tools to harness and utilize this information are not sufficient. This thesis presents a system, called PhacePhinder, which can build a face database from a social network and have it accessible from mobile devices. Through combining existing technologies, this is made possible. It also makes use of a fusion probabilistic latent semantic analysis to determine strong connections between users and content. Using this information we can determine the most meaningful social connection to a recognized person, allowing us to inform the user of how they know the person being recognized. We conduct a series of offline and user tests to verify our results and compare them to existing algorithms. We show, that through combining a user’s friendship information as well as picture occurrence information, we can make stronger recommendations than based on friendship alone. We demonstrate a working prototype that can identify a face from a picture taken from a mobile phone, using a database derived from images gathered directly from a social network, and return a meaningful social connection to the recognized face.

Some loss in memory is considered a part of normal aging; however, there is a considerable heterogeneity in cognitive aging among older adults. Studies show that living arrangements, social interaction, social relationships and size of social network are among the predictors of memory decline for older adults. Moreover, marriage has been associated with physiological health as well as psychological and social well-being. This study has examined the relationship between the marital status and memory performance in older adults. It was hypothesized that (1) being married will be positively related to memory of older adults; (2) participants with larger supportive social network will perform better on memory tests; and (3) that quality of married life will be positively related to memory for married older adults. Results from this study did not support the hypotheses when age was controlled suggesting no relationship between marital status and memory performance.