Spatial TinyDB: A Spatial Sensor Database System for the USN Environment

Towards a Scalable Dynamic Spatial Database System

With the rise of GPS-enabled smartphones and other similar mobile devices, massive amounts of location data are available. However, no scalable solutions for soft real-time spatial queries on large sets of moving objects have yet emerged. In this paper we explore and measure the limits of actual algorithms and implementations regarding different application scenarios. And finally we propose a n...

Spatial-Yap: A Spatio-Deductive Database System

TinyDB: An Acquisitional Query Processing System for Sensor Networks1

In the past few years, smart sensor devices have matured to the point that it is now feasible to deploy large, distributed networks of such devices [Pottie and Kaiser 2000; Hill et al. 2000; Mainwaring et al. 2002; Cerpa et al. 2001]. Sensor networks are differentiated from other wireless, battery-powered environments in that they consist of tens or hundreds of autonomous nodes that operate wit...

The Problem of English Spatial, Non-spatial and Idiomatic Adpositions in Iranian EFL Environment: A Prototypical Approach

Several studies of L2 learners’ interlanguage have addressed the complexity of the English adpositional system due to several reasons like L1 transfer, lack of knowledge in L2 and the strong collocational relations of prepositions with other elements of the English language. The major purpose of the present study is to evaluate the performance of Iranian students in dealing with three broad cat...

Implementing an online spatial database using the GRASS GIS environment

Venkatesh Raghavan* , Shinji Masumoto*, Phisan. Santitamont**, Kiyoshi Honda*** * Osaka City University, 3-3-138 Sugimoto Sumiyoshi-ku, Osaka 558-8585, Japan, tel. ++81666053381, fax ++81666902736, e-mail [email protected], [email protected] ** Survey Engineering Department, Chulalongkorn University, Bangkok 10330, Thailand, tel.++6622186661 fax ++6622186653 e-mail Phisan....