. Mobile information technology increasingly influences everyday life. When used in social contexts several problems regarding how mobile devices convey notifications arise. Auditory notification cues, such as those generally used by mobile phones, can be intrusive and attention demanding. Tactile cues, such as vibrations, are very private and subtle. However, since it is hard for other people nearby to perceive such cues, it can be awkward to understand the actions which a notification cue can give rise to, i.e., tactile cues are not public. We discuss the design space of notification cues for mobile devices and propose an exploration of the space which combines the two dimensions of subtlety and publicity. We conclude with a description of current and future work. 1

: This paper investigates some aspects of how context-awareness can support users of mobile phones, in particular the calling party. The use of mobile and stationary phones is discussed in relation to situational properties of a phone conversation, especially with regards to who might benefit from context-awareness in this context. An initial hypothesis is that mobile phone users communicate context information to each other (verbally) to a much higher degree than do stationary phone users. Mobile phone users could benefit much from context awareness technology, in particular when about to make a call, if they can receive context information regarding the person they are trying to reach prior to establishing the call. We argue that such technology should require low amounts of explicit user interaction, and could lead to less disrupting calls in inappropriate moments, as well as less frustration for the calling party when a call is not answered. Keywords: Computer mediated communicati...

Much development of information technology has been about reducing the importance of distances and user location. Still, many important activities and events are of local nature, for instance serendipitous face-to-face communication. In order to support such communication, as well as other examples of local interaction, we have developed three prototypes all based on wireless short-range communication. The prototypes are functionally selfcontained mobile devices that do not rely on any further infrastructure, making the system inexpensive, flexible and easy for users to manipulate. In these experiments, the limited communication range is not conceived as a problem, but rather as a property that can be explored. We present and discuss the Hummingbirds, Generalised Hummingbirds and the NewsPilot, as well as the implications of this approach for human-computer interaction design.

This paper investigates the impact of Computer Mediated Communication (CMC) in distributed teams on real or perceived Information Overload (IO). Typically, these organizations rely on CMC for communication because teams working on joint projects are spatially dispersed and have to communicate across space and time zones. Many of the problems observed in virtual teams seem to be related to communication in general, and it is unclear, at this stage, how this is affected by the communication medium used. Two general and surprisingly contradicting statements from users of these systems are: • I do not have the necessary information to do my job • I am swamped with information.. The intent of this paper is to extract cause- effect relationship, based on established theories. Supporting theory and literature used to analyze the topic of this paper can be grouped into three areas:

johan redström, per dahlberg, peter ljungstrand & lars erik holmquist Much development of information technology has been about reducing the importance of distances and user location. Still, many important activities and events are of local nature, for instance serendipitous face-to-face communication. In order to support such communication, as well as other examples of local interaction, we have developed three prototypes all based on wireless short-range communication. The prototypes are functionally self-contained mobile devices that do not rely on any further infrastructure, making the system inexpensive, flexible and easy for users to manipulate. In these experiments, the limited communication range is not conceived as a problem, but rather as a property that can be explored. We present and discuss the Hummingbirds, Generalised Hummingbirds and the NewsPilot, as well as the implications of this approach for humancomputer interaction design