The introduction of Google’s Pregel generated much interest in the field of large-scale graph data processing, inspiring the development of Pregel-like systems such as Apache Giraph, GPS, Mizan, and GraphLab, all of which have appeared in the past two years. To gain an understanding of how Pregel-like systems perform, we conduct a study to experimentally compare Giraph, GPS, Mizan, and GraphLab...

Current mobile guides often suffer from the following problems: a long knowledge acquisition process of recommending relevant Points of Interest (POIs), the lack of social navigation support, and the challenge of making implicit user-generated content (e.g., trajectories) useful. Collaborative filtering (CF) is a promising solution for these problems. This article employs CF to mine GPS traject...

In recent years, data from GPS-based surveys has become increasingly important since transport modellers benefit from more accurate and reliable information about times, geographic locations, and routes. At the same time, participants’ burden is reduced substantially if the GPS data collection does not involve time-consuming questions to derive additional information. However, without responden...

OBJECTIVES To determine general practitioners' (GPs') attitudes towards and involvement in general practice research. DESIGN Postal survey and semi-structured interviews conducted from May to September 2001. PARTICIPANTS AND SETTING 467 of 631 GPs in four Queensland Divisions of General Practice responded to the survey (74% response rate); 18 selected GPs were interviewed. MAIN OUTCOME ME...

With the widespread adoption of location tracking technologies like GPS, the domain of transportation information management has seen growing interest in the last few years. In this paper, we describe a stream processing infrastructure for processing large volumes of sensor data in real time to derive useful traffic and travel planning information. We have used this infrastructure to process fl...

In recent times, number of researchers have investigated vehicle tracking applications by fusing the measurements done by accelerometers, as part of inertial navigation system (INS), and GPS (Global Positioning System). However, the sensors in recreational devices like mobile phone have limitations in measurement accuracy and reliability. Usually, sudden changes in vehicle speed are not always ...

It has been considered a fact that GPS performs too poorly inside buildings to provide usable indoor positioning. We analyze results of a measurement campaign to improve on the understanding of indoor GPS reception characteristics. The results show that using state-of-the-art receivers GPS availability is good in many buildings with standard material walls and roofs. The measured root mean squa...

This paper compares the status of primary care computing in England and Scotland with that of Denmark. The rate of utilisation by Danish GPs is among the highest in the world and the MedCom national health network handles over 90% of the country's primary sector clinical communications. A high proportion of English and Scottish GPs also use computers in their clinical practices, and like their ...

In major cities public buses serve as a main source for public transportation System. It has been found that much research work has been carried out in this field using GPS-GSM technology to detect the bus and GPS technology to extract the location of the bus. Taking these aspects into consideration we have proposed a Bus Tracing System with Arrival Time Prediction, by which the commuters can g...