22,060 research outputs found
Human behavioural analysis with self-organizing map for ambient assisted living
This paper presents a system for automatically classifying the resting location of a moving object in an indoor environment. The system uses an unsupervised neural network (Self Organising Feature Map) fully implemented on a low-cost, low-power automated home-based surveillance system, capable of monitoring activity level of elders living alone independently. The proposed system runs on an embedded platform with a specialised ceiling-mounted video sensor for intelligent activity monitoring. The system has the ability to learn resting locations, to measure overall activity levels and to detect specific events such as potential falls. First order motion information, including first order moving average smoothing, is generated from the 2D image coordinates (trajectories). A novel edge-based object detection algorithm capable of running at a reasonable speed on the embedded platform has been developed. The classification is dynamic and achieved in real-time. The dynamic classifier is achieved using a SOFM and a probabilistic model. Experimental results show less than 20% classification error, showing the robustness of our approach over others in literature with minimal power consumption. The head location of the subject is also estimated by a novel approach capable of running on any resource limited platform with power constraints
MRI safety and devices: An update and expert consensus
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154533/1/jmri26909_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154533/2/jmri26909.pd
DiVA: A Distributed Video Analysis framework applied to video-surveillance systems
Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. J. C. San Miguel, J. BescĂłs, J. M. MartĂłnez, and Ă. GarcĂa, "DiVA: A Distributed Video Analysis Framework Applied to Video-Surveillance Systems", in WIAMIS '08. Ninth International Workshop on Image Analysis for Multimedia Interactive Services, 2008, Klagenfurt (Germay), 2008, pp. 207 - 210.This paper describes a generic, scalable, and distributed framework for real-time video-analysis intended for research, prototyping and services deployment purposes. The architecture considers multiple cameras and is based on a server/client model. The information generated by each analysis module and the context information are made accessible to the whole system by using a database system. System modules can be interconnected in several ways, thus achieving flexibility. Two main design criteria have been low computational cost and easy component integration. The experimental results show the potential use of this system.This work is supported by CĂĄtedra Infoglobal-UAM
for âNuevas TecnologĂas de video aplicadas a la
seguridadâ, by the Spanish Government (TEC2007-65400 SemanticVideo), by the Comunidad de Madrid
(S-050/TIC-0223 - ProMultiDis-CM), by the
ConsejerĂa de EducaciĂłn of the Comunidad de Madrid
and by The European Social Fund
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The Risk of Unexploded Ordnance on Construction Sites in London
Greater London, among many large cities, was subject to bombing by the German military in both the World Wars and was the target of many air raids during the Second World War (WW2). This was particularly the case during the Blitz, September 1940 â May 1941, when over 28,000 high explosive bombs and parachute mines were dropped on London. Post war research conducted in 1949 estimated that approximately 12,750ât of bombs, including V1 and V2 rockets, were dropped on London. The night of 16th â 17th April 1941 was one of the worst bombing raids, when 446ât of bombs were dropped on London and over 58ât did not detonate. Unexploded bombs remain buried underground today, as they were unidentified at the time or abandoned owing to difficulties in recovering them. Uncharted bombs continue to pose a potentially significant hazard for developments around London. This paper considers the probability of discovering unexploded ordnance (UXO), particularly WW2 ordnance, during intrusive groundworks in London. The prevalence of unexploded ordnance has been assessed using data obtained from governmental organisations to estimate the likelihood of discovery in London
Planetesimals to brown dwarfs: What is a planet?
The past 15 years have brought about a revolution in our understanding of our Solar System and other planetary systems. During this time, discoveries include the first Kuiper belt objects (KBOs), the first brown dwarfs, and the first extrasolar planets. Although discoveries continue apace, they have called into question our previous perspectives on planets, both here and elsewhere. The result has been a debate about the meaning of the word "planet" itself. It is clear that scientists do not have a widely accepted or clear definition of what a planet is, and both scientists and the public are confused (and sometimes annoyed) by its use in various contexts. Because "planet" is a very widely used term, it seems worth the attempt to resolve this problem. In this essay, we try to cover all the issues that have come to the fore and bring clarity (if not resolution) to the debate
CCTV Surveillance System, Attacks and Design Goals
Closed Circuit Tele-Vision surveillance systems are frequently the subject of debate. Some parties seek to promote their benefits such as their use in criminal investigations and providing a feeling of safety to the public. They have also been on the receiving end of bad press when some consider intrusiveness has outweighed the benefits. The correct design and use of such systems is paramount to ensure a CCTV surveillance system meets the needs of the user, provides a tangible benefit and provides safety and security for the wider law-abiding public. In focusing on the normative aspects of CCTV, the paper raises questions concerning the efficiency of understanding contemporary forms of âsocial ordering practicesâ primarily in terms of technical rationalities while neglecting other, more material and ideological processes involved in the construction of social order. In this paper, a 360-degree view presented on the assessment of the diverse CCTV video surveillance systems (VSS) of recent past and present in accordance with technology. Further, an attempt been made to compare different VSS with their operational strengths and their attacks. Finally, the paper concludes with a number of future research directions in the design and implementation of VSS
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