One way to improve inferences on sensor data is to tune the algorithms through an offline procedure. A potentially less expensive and more accurate method is to use an online procedure based on feedback from users, who often know best what the data means to them. We present a method for user-assisted location inference based on 802.11b wireless signal strengths. A user `corrects' system geolocations by clicking on a map, recording a `virtual access point' (VAP) at the selected point for future inferences. A best VAP is selected using simple criteria, including the VAP's creator. This permits using other's VAPs while getting their own if one exists, capturing user-specific behavior. Indoor experiments in our environment show over 10 times improvement in accuracy.

Pre-2018 CSE ID: CS2003-0765

The traditional university campus is designed to foster a thriving com-munity of learners, but modernity has introduced many stresses. Mobile comput-ing holds the potential to strengthen a campuss traditional institutions of com-munity through a process of indirect mediation. This paper introduces Active-Campus, a suite of personal services for sustaining an educational community. The design and implementation of ActiveCampus is described, which is now in deployment on the UCSD campus.

Pre-2018 CSE ID: CS2002-0714

The traditional university campus is designed to foster a thriving community of learners, but modernity has introduced many stresses. Mobile computing holds the potential to strengthen a campus's traditional institutions of community by creating serendipitous learning opportunities through a process of indirect mediation. This paper introduces ActiveCampus, a suite of personal services for sustaining an educational community based on this idea.

Pre-2018 CSE ID: CS2002-0724

The traditional university campus is designed to foster a thriving community of learners, but modernity has introduced many stresses. Mobile computing holds the potential to strengthen a campus's traditional institutions of community through a process of indirect mediation. This paper introduces ActiveCampus, a suite of personal services for sustaining an educational community. The design and implementation of ActiveCampus is described, which is now in deployment on the UCSD campus.

Pre-2018 CSE ID: CS2002-0704