15,899 research outputs found

    Analysis of current and potential sensor network technologies and their incorporation as embedded structural system

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    This document provides a brief overview of the actual wireless ad hoc sensor networks technologies and standards available, especially in view of their possible implementation for shipping container protection and monitoring within the framework of the STEC Action aiming at analyzing possible technical solutions to improve the security of the millions of containers moving in and out of Europe. Examples of applications and research projects are reported from the literature to give insights on the possibility of implementation of wireless sensor networks in real world scenarios.JRC.G.5-European laboratory for structural assessmen

    The coherence of EU trade, competition, and industry policies in the high tech sector : the case of the telecommunications services sector

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    We analyze the coherence existing among European Union competition, industry, and trade policies in the high tech sector in general terms focusing on its specific features (externalities, fast progress) and their effects on the emergence and treatment of policy consistency and conflicts. Second, this analysis is applied to the European telecommunications services sector. The examination of this sector and the relevant EU policies reveals a consensus on giving priority to competition. However structural factors prevent policy implementation to reflect much liberalization and harmonization and business responses to trade globalization challenge effective competition. The potential, important role of standardization is shown.economics of technology ;

    An Overview of Mobile Ad Hoc Networks for the Existing Protocols and Applications

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    Mobile Ad Hoc Network (MANET) is a collection of two or more devices or nodes or terminals with wireless communications and networking capability that communicate with each other without the aid of any centralized administrator also the wireless nodes that can dynamically form a network to exchange information without using any existing fixed network infrastructure. And it's an autonomous system in which mobile hosts connected by wireless links are free to be dynamically and some time act as routers at the same time, and we discuss in this paper the distinct characteristics of traditional wired networks, including network configuration may change at any time, there is no direction or limit the movement and so on, and thus needed a new optional path Agreement (Routing Protocol) to identify nodes for these actions communicate with each other path, An ideal choice way the agreement should not only be able to find the right path, and the Ad Hoc Network must be able to adapt to changing network of this type at any time. and we talk in details in this paper all the information of Mobile Ad Hoc Network which include the History of ad hoc, wireless ad hoc, wireless mobile approaches and types of mobile ad Hoc networks, and then we present more than 13 types of the routing Ad Hoc Networks protocols have been proposed. In this paper, the more representative of routing protocols, analysis of individual characteristics and advantages and disadvantages to collate and compare, and present the all applications or the Possible Service of Ad Hoc Networks.Comment: 24 Pages, JGraph-Hoc Journa

    Proceedings of the Second International Mobile Satellite Conference (IMSC 1990)

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    Presented here are the proceedings of the Second International Mobile Satellite Conference (IMSC), held June 17-20, 1990 in Ottawa, Canada. Topics covered include future mobile satellite communications concepts, aeronautical applications, modulation and coding, propagation and experimental systems, mobile terminal equipment, network architecture and control, regulatory and policy considerations, vehicle antennas, and speech compression

    Internet of Things-aided Smart Grid: Technologies, Architectures, Applications, Prototypes, and Future Research Directions

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    Traditional power grids are being transformed into Smart Grids (SGs) to address the issues in existing power system due to uni-directional information flow, energy wastage, growing energy demand, reliability and security. SGs offer bi-directional energy flow between service providers and consumers, involving power generation, transmission, distribution and utilization systems. SGs employ various devices for the monitoring, analysis and control of the grid, deployed at power plants, distribution centers and in consumers' premises in a very large number. Hence, an SG requires connectivity, automation and the tracking of such devices. This is achieved with the help of Internet of Things (IoT). IoT helps SG systems to support various network functions throughout the generation, transmission, distribution and consumption of energy by incorporating IoT devices (such as sensors, actuators and smart meters), as well as by providing the connectivity, automation and tracking for such devices. In this paper, we provide a comprehensive survey on IoT-aided SG systems, which includes the existing architectures, applications and prototypes of IoT-aided SG systems. This survey also highlights the open issues, challenges and future research directions for IoT-aided SG systems

    Simulating Road Traffic for Generating Cellular Network Logs in Urban Context

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    Viimastel aastatel on hakanud mobiilside andmestik paeluma aina rohkem teadlasi erinevatelt teadusdistsipliinidelt. Need andmed aitavad mõista inimeste käitumis- kui ka liikumismustreid. Mitmed mobiilsusandmestikud (nagu näiteks Call Detail Records mobiilside andmed) ning GPS andmed näitavad inimeste liikumissagedust ja -põhjusi.Need andmestikud sisaldavad endas väärtuslikku informatsiooni ühiskonna kohta. Töödeldud informatsiooni saab kasutada mitmel otstarbel. Teadlased saaksid andmestiku põhjal planeerida teedevõrgustikke, paremini suunata inimestele reklaame arvestades nende paiknemist, luua uusi positsioneerimistehnoloogiaid, arendada rahvastikukontrolli tarkvara jne.Vaatamata tehnoloogilistele võimalustele on inimeste mobiilsusandmestikud väga raskesti kättesaadavad, sest need on kaitstud riiklike regulatsioonide poolt, kuna riivavad inimeste privaatsust. Teine tegur on mobiilioperaatorite enda huvi luua inimeste mobiilsusandmetel põhinevaid kommertslahendusi. Selline situatsioon ei innusta operaatoreid jagama äriliselt vajalikku informatsiooni kolmandate osapooltega. Antud magistritöö käigus näidatakse, kuidas sellest raskest probleemist üle saada arendades mobiilsidevõrgukäitumissimulatsiooni prototüüpi. Genereerides andmeid läbi erinevate teaduslike liikumismudelite, mida võimaldab meile liiklussimulatsiooni tarkvara.Uurimistöö tulemusena selgus, et selline lähenemine on resultatiivne ja omab mitmeid laienemisvõimalusi. Täheldati mitmeid võimalusi koostööks teiste uurimisvaldkondadega, et muuta genereeritavaid mobiilsusandmeid reaalelule sarnanevateks. Mobiilsidevõrgu käituvussimulatsioon on näidanud suurt potentsiaali ning arendamise käigus avaldusid võimalused, mida algselt ei osatud oodata. Mainitud mobiilsidevõrgu käituvussimulatsioon on integreeritud eksisteeriva liiklussimulatsiooni tarkvaraga, mis on vabavara ning mida on võimalik laialdaselt konfigureerida. Liiklussimulatsiooni tarkvaraskasutatavad inimkäitumise mudelid põhinevad erinevate teadustööde tulemustel ning seetõttu mobiilsidevõrgu käituvus- ning liiklussimulatsiooni sümbioosi tulemusel genereeritud andmed on märkimisväärse väärtusega.In the last years, the use of mobile phone data logs start to attract a lot of researchers’ attentions from various disciplines. Those logs help the scientist to understand and predict human behaviour. The mobility logs, like Call Detail Records and GPS data, show where to people commute, how often do they commute and, usually, those logs also say why. These logs hold knowledge about our society, from that data the knowledge could be extracted and used for multiple purposes. The scientists could analyse through the movement how to plan the road infrastructure, generate target advertisement based on forecasting peoples displacement, new positioning technology, population control software, etc. But there are limits on the people's mobility data. Those information logs are heavily protected by the government privacy data laws to protect the personal rights. Additionally, the mobile operators are interested in their own commercial solutions and therefore their interest to share vital information is low. Here, in this thesis, we show that this cumbersome problem can be over-stepped by prototyping a cellular network behaviour simulator to generate the logs for us through different scientific commuting models inherited from the traffic simulation program.The result of this thesis reveals that this approach is feasible and shows multiple expansion possibilities how to produce even more real-life like mobility logs. The development of the cellular network behaviour simulation has shown huge potential and even bigger possibilities than predicted in the beginning. Since, our cellular network behaviour simulation is integrated with already existing open-source, highly configurable, road traffic simulator basing on the scientific human behaviour models produce with considerable value data
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