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Initially restricted within schools, the violence among students began in the Internet through social networks, starting cyber bullying expression. This study aims to analyze the influence of worry and involvement of teachers in cyber bullying practices. For this, a survey was conducted among 112 elementary and high school teachers from public and private schools in the city of Blumenau, SC, Brazil...
According to the characteristics of information dissemination and user interaction on the internet, a discrete time model, which is based on the node influence, is proposed. In the model, every node has the opinion and the influence which is defined as the weight of network, these nodes will redistribute the weights and update their opinions during the each period. The simulation results show that...
The Big Data are increasing exponential every year so that data became very complex and difficult to be processed. To resolve this problem, data management and analysis offer opportunities to improve decisions in critical development areas such as: meteorology, medicine, finance, sociology or internet. But, classical statistics programs encounter their limits in processing large data-sets, so that...
People today exchange a great variety of information over the Internet. Much like the world at large, people bring a wide range of values to their interaction with each other as they communicate over the Internet. While the Internet has certainly facilitated social interaction, security measures have become absolutely essential to ensure private information is not compromised or tampering with. These...
The structure of the current Internet does not fully reflect the structure of human relationships in the real world. Human relationships are structured as various community networks, however IP-based network is essentially not structured in terms of information retrieval and sharing. In the communication style on the current network, end node can obtain information and contents from the whole of the...
The increasing development of health social networks (HSN) in recent years has led the fast growing of user-generated contents. People tend to interact and share health information in social networks. However, the trustworthiness of information is the major concern in shared health information in social networks. Viral rumor-spreading that can happen quite rapidly in social media can cause damages...
In the age of Internet, people are using the social network services (SNS) to share information more frequently. Rumor spreading as a basic mechanism for information in online social network (OSN) has a significant impact on people's life. In this paper, A spreading model of rumor and derive differential equations that describe the dynamics of the model on online social network are introduced. Comparing...
Online communities provide Internet users with means to overcome some information barriers and constraints, such as the difficulty to gather independent information about products and firms. Product review communities allow customers to share their opinions and emotions after the purchase of a product. We introduce a new dataset of product reviews from Amazon.com, with emotional information extracted...
This study investigates information cascades in knowledge sharing behavior in virtual communities. A research framework based on the social cognitive theory is developed to identify factors that would influence information cascades in knowledge sharing behavior in virtual communities. Structural Equation Modeling (SEM) is employed to test the hypotheses empirically. A survey involving a total of 213...
As the competition between firms increases rapidly, it is critical to innovate continuously. Accessing external knowledge is essential to have continuous innovative products. This paper focuses on the virtual community of practice (VCoP), is a type of community of practice but exists virtually for acquiring and sharing external knowledge. To find out users'' intentions of using VCoP, this papr adopts...
Text keywords at different semantic levels have different semantic representation abilities. Although words have been organized by semantic dictionaries (e.g. WordNet) with exact semantics, the dictionaries can not be constructed automatically by machine and there are still many words which are not included in the dictionaries. This paper proposes a novel method to automatically extract keywords of...
Since people are increasingly using online tools to share ideas and contact others, the importance of virtual communities is growing day by day. However, in the quest for exploring the relationship between psychological sense, trust, and knowledge sharing in virtual communities, there have been still very few studies. This study has revealed how knowledge sharing is fostered through trust in order...
On the basis of extant literatures, we built a conceptual model of the relationship between perceived quality, trust, extrinsic motivation, intrinsic motivation and usage in the virtual communities with real-name system, and proposed some hypotheses about them. To test the hypotheses, we designed a questionnaire, and collected data from the members who use virtual communities with real-name system...
This paper presents a framework for Aggregated Social Graphs, the ASG Framework, for developing applications that harness information available on social networking sites and telecom platforms to make communication simpler and richer. The framework aggregates users social graph by harnessing contact and social information from multiple communication environments and then calculating the social strength...
Attractiveness of social network analysis as a research topic in many different disciplines is growing in parallel to the continuous growth of the Internet, which allows people to share and collaborate more. Nowadays, detection of community structures, which may be established on social networks, is a popular topic in Computer Science. High computational costs and non-scalability on large-scale social...
Since the explosion and popularity of Internet, virtual brand community has been serving as a new and important brand experience centre for consumers to acquire necessary brand and product knowledge. Based on the empirical literature and the nature of online shopping, this study proposed a series of research hypotheses and a theoretical model. Internet shoppers' brand experience (sensory, affective,...
Knowledge sharing is a critical issue in information-rich and knowledge-intensive industry e.g. healthcare industry. The collaborative group of Knowledge-based virtual communities is a way for promote knowledge sharing, which might improve the performance of organizations in competitive environment. However, it is difficult to choose and introduce the appropriate knowledge-based virtual community,...
BitTorrent-based file sharing communities are very popular nowadays. Anedoctal evidence hints that such communities are exposed to content pollution attacks (i.e., publication of `false' files, viruses, or other malware), requiring a moderation effort from their administrators. The size of such a cumbersome task increases with content publishing rate. To tackle this problem, we propose a generic pollution...
This paper intends to establish a method to measure the performance of telecenters from the perspective of social sustainability. Social sustainability, one of the driving forces of telecenter sustainability, can be achieved when telecenter is able to deliver community acceptance content to majority of the local population. In addition to content design, telecenters have to be efficient in their operation...
In this paper, we motivate the need for new models for Secure Information Sharing (SIS) in the specific domain of community cyber security. We believe that similar models will be applicable in numerous other domains. The term community in this context refers to a county or larger city size unit with a clearly demarcated geographical boundary aligned more or less with a governance boundary. Our choice...
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