Age invaders (AI), is a novel interactive intergeneration social-physical game which allows the elderly to play harmoniously together with children in the physical space, while parents can participate in the game play in real time remotely in the virtual ...

Under-contribution is a problem for many online communities. Social psychology theories of social loafing and goal-setting can provide mid-level design principles to address this problem. We tested the design principles in two field experiments. In one, ...

Social-network analysis generally helps researchers understand how groups of people interact.The author uses small-scale egocentric social networks, based on volitional, explicit connections, to understand how people manage their personal and group communications.Two ...

We present Waterhouse, a system for sending and receiving cryptographically protected electronic mail ("secure e-mail"). We show how an existing e-mail interface can be modified to make exchanging secure e-mail nearly effortless. Our system integrates ...

A reputation function and associated reputation management system (RMS) seem to be at the heart of all online transactional activities that require trust. However, most of the first generation RMS used are yet very basic, ad hoc and often vulnerable ...

The RideNow Project is designed to help individuals within a group or organization coordinate ad hoc shared rides. This paper describes three design decisions the RideNow team made in order to allow incremental adoption and evolution and to capitalize ...

Professional networking is a primary goal of people attending conferences and events. Over the past year we have developed an online social networking and community tool for events, Pathable, to help attendees meet the right people. Pathable provides ...

Emerging web 2.0 technologies are increasingly making use of multimedia formats and furthermore allow users to produce their own content and refurbish information in a highly creative and collaborative way themselves. A new kind of web-enabled platform ...

Communication on mobile devices plays an important role in people's use of technology for leisure, but to date this communication has largely been one-to-one. Mobile internet connectivity can support a variety of group-based messaging and media sharing ...

From an analysis of actual cases, three categories of bias in computer systems have been developed: preexisting, technical, and emergent. Preexisting bias has its roots in social institutions, practices, and attitudes. Technical bias arises from technical ...

Social networks have thus far served primarily as analytic tools for social scientists.Leveraging pervasive computing, this new research transforms social-network models into behavioralfeedback displays.These ambient displays, which reflect data on remote ...

Present computer games and digital entertainment do not usually facilitate intergenerational family interactions. According to recent survey results in Japan, there is a high percentage of older people who own and play electronic or computer games, but ...

Usability is a growing concern in designing systems and applications that operate securely. Most usability work has focused on improving user interfaces, but security is systemic, and negotiating, instituting, and maintaining real-world security procedures ...

People search for people with suitable expertise all of the time in their social networks - to answer questions or provide help. Recently, efforts have been made to augment this searching. However, relatively little is known about the social characteristics ...

We present an Annotation-Based Access Control model supported by a Collaboration Vocabulary (CoVoc) as a more flexible and user-centric access control approach in social platforms and shared workspaces. We present also briefly two SOA-based tools for ...

This paper introduces Age Invaders (AI), a novel interactive intergeneration social-physical game which allows the elderly to play harmoniously together with children in physical space while parents can participate in the game play in real time remotely ...

This paper introduces the embodied Web, a new design paradigm for mobile devices. The embodied Web aims to provide an interface using real-world embodied interaction to provide a computer-augmented reality that accesses web services. This platform regards ...

Trust plays an important role in successful online businesses. In this paper, we consider the important case of interactions in peer communities, and then propose a trust established model based on social computing which aims at avoiding interaction ...

This paper contributes to a growing body of design patterns in interaction design for cooperative work, while also describing how to go from field studies to design patterns. It focuses on sociable face-to-face situations. The patterns are based ...