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Widespread sensing devices enable a world in which physical spaces become personalised in the presence of mobile users. An important example of such personalisation is the use of pervasive displays to show content that matches the requirements of ...

The breach of users' location privacy can be catastrophic. To prevent privacy breaches, numerous location privacy methods have been developed in the last two decades. However, they have not been widely adopted in location-based applications. As a result, ...

This work provides a preliminary understanding of how transgender women and non-binary people of color experience violence and manage safety, and what opportunities exist for HCI to support the safety needs of this community. We conducted nine ...

General aviation flights range from gliders and powered parachutes to corporate business jet flights. The majority of the world's air traffic falls into this category which covers a large range of activities, both commercial and non-commercial. As such, ...

This paper discusses the role of usefulness, usability, and user experience in a startup company focusing on location-based applications. In just three years, the emphasis of design moved from usefulness to UX, resulting in opening new market segments, ...

Reducing the communication energy is essential to facilitate the growth of emerging mobile applications. In this paper, we introduce signal strength into location-based applications to reduce the energy consumption of mobile devices for data reception. ...

Continuous exposure of location information, even with spatially cloaked resolution, may lead to breaches of location privacy due to statistics-based inference attacks. An alternative and complementary approach to spatial cloaking based location ...

Millions of users a day using location-based social network applications such as Foursquare, Facebook Place, or Google+ to find, share or check-in their locations or point of interest to friends. However, the position may have been disclosed to other ...

Many location-based applications such as geo-social networks rely on location services storing mobile object positions. To update positions on location servers, position update protocols are used. On the one hand, these protocols decide when an update ...

The adoption and use of mobile location-based applications (LBAs) (e.g. Loopt, Gowalla, Foursquare, Facebook Places, My Town) are far behind industry expectations. Drawing on social exchange theory, we present a theoretical framework to examine the cost-...

Introducing finer-grained privacy controls would let users divulge only enough location information to achieve a desired service quality.

A key challenge in mobile social media applications is how to present personalized content that is both geographically and temporally relevant. In this paper, we propose a new and generic temporal weighting function for improving location ...

A point of interest (POI) is a focused geographic entity such as a landmark, a school, an historical building, or a business. Points of interest are the basis for most of the data supporting location-based applications. In this paper we propose to ...

Location-based applications have become increasingly popular on smartphones over the past years. The active use of these applications can however cause device battery drain owing to their power-intensive location-sensing operations. This paper presents ...

Mobile applications often need location data, to update locally relevant information and adapt the device context. While most smartphones do include a GPS receiver, it's frequent use is restricted due to high battery drain. We design and prototype an ...

Individuals face privacy risks when providing personal location data to potentially untrusted location based services (LBSs). We develop and demonstrate CacheCloak, a system that enables realtime anonymization of location data. In CacheCloak, a trusted ...

Identity management provides PET (privacy enhancing technology) tools for users to control privacy of their personal data. With the support of mobile location determination techniques based on GPS, WLAN, Bluetooth, etc., context-aware and location-aware ...