Passive wireless sensors have the advantages of operating without a power supply and remote sensing capability. Hence, they are very suitable for some harsh environments, such as hermetic environments, rotating parts, or very high temperature environments. The spray painting workshop is such a harsh environment, containing a large amount of flammable paint mist and organic gas. Aiming at this s...

A generic prediction of hierarchical clustering models is that the mass function of dark haloes in dense regions in the Universe should be top-heavy. We provide a novel test of this prediction using a sample of galaxies drawn from the Sloan Digital Sky Survey. To perform the test, we compare measurements of galaxy clustering in dense and underdense regions. We find that galaxies in dense region...

Abstract: In wireless communication, the multi-path fading effect has big influence on the system performance. Especially, in passive UHF RFID system where tag is operated by the power supplied with the RF signal of the reader, the influence of multi-path fading increases. Therefore the communication performance changes drastically depending on the locations of tags and reader. In this paper, w...

GRB980519 is characterized by its rapidly declining optical and X-ray afterglows. Explanations of this behavior include models invoking a dense medium environment which makes the shock wave evolve quickly into the sub-relativistic phase, a jet-like outflow, and a wind-shaped circumburst medium environment. Recently, Frail et al. (1999b) found that the latter two cases are consistent with the ra...

This paper presents a new hybrid metric map representation (HMM) that combines feature maps with other dense metric sensory information. Representing non-geometric properties of the environment is one of the outstanding challenges in robotic research. The representation presented here will allow the robot to perform DenseSLAM. DenseSLAM is the process of performing SLAM whilst obtaining a dense...

Low-cost Radio Frequency Identification (RFID) location sensing algorithm is practical and crucial for urban infrastructure location. Current RFID location algorithms are based on fixed multiple RFID reader or reference points (reader or tag) with known position, which is cost and difficult to deployment in urban environment. The objective of this study is to develop a low-cost location sensing...