Sensor technology brings the pervasive capability for observing and communicating real-world dynamics, while current GeoWeb lacks a model for scalable aggregation of client-side logic applications that convey and apply these dynamics. This research explores a client-side architectural model, ADIR (short for Aggregating Dynamics, Interaction & Responsiveness), for organizing geospatial logic app...

As part of our contribution to the RealityGrid project we have developed a computational steering client that can be used on a PDA from any wireless access point. This development has the potential to free the application scientist from the desktop as the only means of steering simulations. We have used the PDA steerer to interactively steer compute intensive simulations in OGSI::Lite from a li...

The Domain Name System (DNS) is a critical component of the Internet infrastructure as it maps human-readable hostnames into the IP addresses the network uses to route traffic. Yet, the DNS behavior of individual clients is not well understood. In this paper, we present a characterization of DNS clients with an eye towards developing an analytical model of client interaction with the larger DNS...

In psychotherapy interactions there are several desirable and undesirable behaviors that give insight into the efficacy of the counselor and the progress of the client. It is important to be able to identify when these target behaviors occur and what aspects of the interaction signal their occurrence. Manual observation and annotation of these behaviors is costly and time intensive. In this pap...

Web APIs provide a systematic and extensible approach for application-toapplication interaction. Developers using web APIs are forced to accompany the API providers in their software evolution tasks. In order to understand the distress caused by this imposition on web API client developers we perform a semi-structured interview with six such developers. We also investigate how major web API pro...

To a client, one of the simplest services provided by a distributed system is a time service. A client simply requests the time from any set of servers, and uses any reply. The simplicity in this interaction, however, misrepresents the complexity of implementing such a service. An algorithm is needed that will keep a set of clocks synchronized, reasonably correct and accurate with rcspcct to a ...

The Permit based Locking design pattern provides fast acquisition and release of locks without network communication even in distributed systems build around a central lock server. Instead of plain locks, the server manages "permits to lock", and passes them to those clients which probably need the lock next. If a client hosts a permit, the associated lock can be acquired immediately without se...