The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Many methods have been proposed to determine influential nodes or links in network structures. However, most methods typically operate on a global scale with the assumption of static networks. Here a new ranking algorithm is proposed to find local influencers on Twitter that appear within the context of a specific event being discussed, incorporating the network dynamics as the event evolves with...
Owing to the popularity of Online Social Media (OSM), Internet users share a lot of information on and across OSM services every day. Users recommend, comment, and forward information they receive from friends, contributing in spreading the information in and across OSM services. We term this information diffusion process from one OSM service to another as Cross-Pollination, and the network formed...
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...
Individuals from different regions normally bear different cultural norms and values, and these variations would in turn affect their behavior and attitude with the computing system. However, though the cross-cultural study has been performed in other areas (e.g., e-commerce websites), few have identified its influence on users' behavior in social network sites (SNS). With the increasing popularity...
To date web search has been a solitary experience for the end-user, despite the fact that recent studies highlight the potential for collaboration that is inherent in many search tasks and scenarios. As a result, researchers have begun to explore the potential for a more collaborative approach to web search, one in which the search actions of other users can influence the results returned. In this...
Consider the scenario where information is introduced into a network, advising recipients to take an action. If at a later time, the information is found to be inaccurate and the action is unnecessary, it becomes necessary to stop the information from spreading and to prevent actors from taking the action. We investigate the concept of introducing counter messages into a network to interfere with...
Scalable processing of Human Computing tasks by large pools of community members is one of the key opportunities of the modern Social Web. However, the self-organizing nature of Web communities does not allow for guarantees of user commitment and output quality. This is a serious drawback, especially for applications with continuously arriving input data (e.g. reviews and assessments in social streams)...
Virtual goods continue to emerge in online communities, offering scholars an opportunity to understand how social networks can facilitate the diffusion of innovations. We examine the social ties for over one million user-to-user virtual goods transfers in Second Life, a popular 3D virtual world, and the unique role that groups play in the diffusion of virtual goods. The results show that individuals...
This paper considers the problem of n-player conflict modeling, arising due to competition over resources. Each player represents a distinct group of people and has some resource and power. A player may either attack other players(i.e., groups) to obtain their resources or do nothing. We present a game-theoretical model for interaction between the players, and show that key questions of interest to...
Modeling information diffusion in networks enables reasoning about the spread of ideas, news, opinion, and technology across a network of agents. Existing models generally assume a given network structure, in practice derived from observations of agent communication or other interactions. In many realistic settings, however, observing all connections is not feasible. We consider the problem of modeling...
A common question in social networking research is how edges form to produce social graphs with the common characteristics, including a power-law degree distribution and a small diameter. One common model for edge formation in synthetic networks is preferential attachment. We examine the edge formation process of one Online Social Network (OSN), Buzz net, and look for evidence for preferential attachment...
Many users join online health communities (OHC) to obtain information and seek social support. Understanding the emotional impacts of participation on patients and their informal caregivers is important for OHC managers. Ethnographical observations, interviews, and questionnaires have reported benefits from online health communities, but these approaches are too costly to adopt for large-scale analyses...
In order to support a software development team in its day-to-day operations, different data sources can be exploited. In this paper, we focus on CVS logs and communication profiles between developers provided by RFID-proximity information. We provide a novel approach for combining the data sources into a graph, and apply the page rank algorithm for capturing interesting knowledge about resource and...
Scalability issues make it time-consuming to estimate even simple characteristics of large scale, online networks, and the constantly evolving qualities of these networks make it challenging to capture a representative picture of a particular network's properties. Here we focus on the evolution of all triads (ties between three nodes) in a graph, as a method of studying changeover time in large scale,...
In recent years, reality mining experiments have provided several novel insights into human social behavior that would not have been possible without the novel use of smart phone sensing. In this work, we leverage the latest reality mining experiment to study social behavior from a public health perspective. In particular, we focus on sleep and mood as they have a considerable public health impact...
The world has recently witnessed several disasters, wherein the human cost of the catastrophe depended strongly on the delivery time of critical rescue information, mostly through strangers, on the location and status of individuals. Unfortunately, these are often situations wherein technology ceases to function. Pen-and-paper solutions then become the only viable option for information transfer....
Social web users are a very diverse group with varying interests, levels of expertise, enthusiasm, and expressiveness. As a result, the quality of content and annotations they create to organize content is highly variable. While several approaches have been proposed to mine social annotations, for example, to learn folksonomies that reflect how people relate narrower concepts to broader ones, these...
Social media services like Twitter, Flickr and You Tube publish high volumes of user generated content as a major event occurs, making them a potential data source for event analysis. The large volume and noisy content of social media makes automatic preprocessing essential. Intuitively, the event-related data falls into three major phases: the buildup to the event, the event itself, and the post-event...
Enjoyment is a vital component in the business model of the game industry. Despite research on their relationship to the success or failure of a game, little attention has been paid to the effect of player performance on player enjoyment. This study investigates how player motivation, player performance, and player enjoyment are connected in Ever Quest II, a popular massively multiplayer online role-playing...
A growing number of projects are solving complex computational and scientific tasks by soliciting human feedback through games. Many games with a purpose focus on generating textual tags for images. In contrast, we introduce a new game, Odd Leaf Out, which provides players with an enjoyable and educational game that serves the purpose of identifying misclassification errors in a large database of...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.