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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Podpora GSM alarmu na mobilním zařízení / GSM Alarm Support on Mobile Device

Kalus, Jiří January 2011 (has links)
This master's thesis describes the mobile application that provides the support to control the GSM/GPS alarms. Based on the possibilities of modern security equipment and mobile devices, the application adds new functionality for these alarms. This work mainly describes selecting the appropriate mobile platform, application designs and the independence on the specific alarm. In conclusion, the results and possible extension of the application are talked over.
62

Návrh a vývoj aplikace pro monitorování polohy / Design and development of application for position monitoring

Kovář, Petr January 2009 (has links)
The aim of the master’s thesis was to implement in the C++ language a software solution of the localization of the mobile phone with Symbian OS in the GSM network. The intended purpose of this solution would be especially the phone localization in the case of its theft or loss. A familiarization with the development process of the Symbian platform and understanding the features of the Symbian version of the C++ language preceded the realization itself, because the Symbian C++ has an original style of the memory manipulation and error handling. The Symbian C++ basic principles and its features used in the implemented software are described in the second chapter of the text part, the first chapter deals with the history and version structuring of the Symbian OS. In the third part of the text is described the created software. The realized solution consists of three parts – server application PhoneLocServer for a mobile device, client application PhoneLocClient for a PC and the web-located part. The server was developed for the Symbian OS in the C++ language in the IDE Carbide.c++ and was tested in the S60 3rd edition SDK MR emulator and on the real device Nokia N73. It is a GUI-less application running in the background, which is run automatically after a smartphone start-up. It controls the incoming SMS over the socket listening and the messages addressed to itself processes before a user can notice them. The control messages body is comprised of a prefix, which identifies them, a password, a sending period value and a state to which application should change. After the receiving of the control SMS server verifies the SMS sender through the use of his telephone number and the password. It compares these values with the data stored for the given IMEI on the web server. If the verification succeeds, the server runs a timer with the period known from the control SMS and on the callback of this timer are transferred the data describing current phone location and state via HTTP protocol to the web server. The GSM localization method “Cell ID” is used for the location determination. After the client user asks for the start of loading the data, he must answer the password and the observed phone’s IMEI and he is verified through the use of the web server again. If the verification succeeds, the periodic download of the server data starts and from the first downloaded file is found out the upload period. Download then continues till the time the client detects the end of sending by the server part or till the client user stops the download himself. The client was developed in the C++ language in the C++ Builder environment. It requires a Windows OS and internet connection for its right function. The web server mediates communication between the server and the client, stores the data for user verification and makes possible the server-side upload by the help of a simple PHP script. In all the used web server directories is present the .htaccess file to improve its security, e.g. it denies the directory listing in a web browser.
63

Studie provozuschopnosti silniční sítě s využitím telematických přístupů / The Study of Serviceability of Highway network with Using of Telematics

Bruna, Jiří January 2008 (has links)
In the mean time there are only a few objective information available in a road accident . A electronically motor vehicle operational data recorder, that is main topic of my graduate work could record maximum of vehicle operational data (time, velocity, activity of brakes, activity of ABS, lights, blinkers, operational engine measures). This information could contribute to faster car crash investigation.
64

Geotracking : En parameter för morgondagens hyror? / Geotracking : A parameter for tomorrow’s rent?

Nylander, Oskar, Ryott Hööglund, Victor January 2017 (has links)
Handeln i fysiska butiker står inför en stor utmaning, konkurrensen från e-handeln  tar marknadsandelar. Detta innebär ett problem för butiksinnehavare och därmed även för fastighetsägare. Många är idag överens om att handeln i fysiska butiker kommer att behöva genomgå stora förändringar för att fortsätta attrahera kunder. Många butiker blir idag mer som showrooms där människor testar varor som sedan handlas online. När detta sker så skiftar butikens syfte från försäljning till att vara en marknadsföringskanal för varumärket. Idag bestäms butikshyran till ett fast belopp eller baseras på omsättning men om butiken blir en marknadsföringsplats kan det vara mer relevant att ta betalt baserat på hur många som ser butiken. Med hjälp av en ny teknik vid namn geotracking kan man ta fram noggrann data på hur många personer som passerar utanför en butik. Geotracking är ett samlingsbegrepp för olika tillvägagångssätt att spåra människors geografiska position genom deras mobiltelefoner. Det går ut på att man på olika sätt mäter radiovågor som telefonerna sänder ut. Syftet med denna rapport är att undersöka om man kan använda geotracking som underlag för hyressättning av butikslokaler. För att besvara detta har rapporten delats in efter tre, för geotracking, grundläggande förutsättningar. Dessa är teknik, hyressättning och integritet. Resultatet av studien visar att det finns ett behov av att optimera hyressättningen av butiker för att möta framtida utmaningar. Den visar också att de tre grundförutsättningarna för geotracking går att uppfylla varför det är lämpligt att använda geotracking vid hyressättning av butikslokaler. / The Retail industry is facing a big challenge, competition from e-commerce that is taking market shares. This poses a problem for shopkeepers and therefore also for property owners. Today various people agree that the retail industry will need to undergo major changes to keep attracting customers. Many stores today become more like showrooms where people test products that are then bought online. When this happens, the shop's purpose changes from sales to being more like marketing for the brand. Today, a stores rent is determined at a fixed amount or based on sales, but if the store becomes a marketing site, it may be more relevant to charge based on how many people see the store. Using a new technique called geotracking, you can get accurate data on how many people pass outside a store. Geotracking is a collective term for different approaches to trace people's geographic position through their mobile phones. It works by measuring radio waves as the phones broadcast. The purpose of this report is to investigate whether geotracking can be used as a basis for determining rent. To answer this, the report has been divided after three, for geotracking, basic conditions. These are technology, rent determination and integrity. The result of the study shows that there is a need to optimize the rent determination of stores to meet future challenges. It also shows that the three basic conditions for geotracking can be met, why it is advisable to use geotracking when determining rent for a shop space.
65

Identification of cellular handsets through radio frequency signature extraction on an FPGA platform / Johannes Petrus Hattingh

Hattingh, Johannes Petrus January 2015 (has links)
Specific emitter identification refers to the process of performing identification of radio frequency transmitters by exploiting unique variations in emitted signals, caused by hardware variations. In previous research, specific emitter identification was successfully performed on GSM handsets. However, no research has been done on the implementation of specific emitter identification of GSM handsets on an FPGA platform. This study focuses on feature extraction and identification algorithms, as well as the implementation of the identification algorithm on an FPGA. During this study, phase modulation error was used, as previous research indicated that phase modulation error is an effective feature set for identification purposes. As the implementation of a classification algorithm on an FPGA was required, a trade-off between complexity and feasibility needed to be made during the selection process. The artificial neural network was selected as the optimal classifier for implementation on an FPGA. The algorithm was first implemented in software and used as the basis for the design on an FPGA. A piece-wise linear approximation of a sigmoid function was used to approximate the activation function, where a look-up table was used to store the parameters. The off-line training of the artificial neural network was performed in software using the back-propagation gradient descent algorithm. Good results for the identification of GSM handsets on an FPGA were obtained, with a true acceptance ratio of 97.0%. This result is similar to the performance obtained in previous research performed in software. In this study, it was found that specific emitter identification of GSM handsets can be performed on an FPGA. Real-world applications for this technology include general cellular handset identification and access control. / MSc (Electrical and Electronic Engineering), North-West University, Potchefstroom Campus, 2015
66

Identification of cellular handsets through radio frequency signature extraction on an FPGA platform / Johannes Petrus Hattingh

Hattingh, Johannes Petrus January 2015 (has links)
Specific emitter identification refers to the process of performing identification of radio frequency transmitters by exploiting unique variations in emitted signals, caused by hardware variations. In previous research, specific emitter identification was successfully performed on GSM handsets. However, no research has been done on the implementation of specific emitter identification of GSM handsets on an FPGA platform. This study focuses on feature extraction and identification algorithms, as well as the implementation of the identification algorithm on an FPGA. During this study, phase modulation error was used, as previous research indicated that phase modulation error is an effective feature set for identification purposes. As the implementation of a classification algorithm on an FPGA was required, a trade-off between complexity and feasibility needed to be made during the selection process. The artificial neural network was selected as the optimal classifier for implementation on an FPGA. The algorithm was first implemented in software and used as the basis for the design on an FPGA. A piece-wise linear approximation of a sigmoid function was used to approximate the activation function, where a look-up table was used to store the parameters. The off-line training of the artificial neural network was performed in software using the back-propagation gradient descent algorithm. Good results for the identification of GSM handsets on an FPGA were obtained, with a true acceptance ratio of 97.0%. This result is similar to the performance obtained in previous research performed in software. In this study, it was found that specific emitter identification of GSM handsets can be performed on an FPGA. Real-world applications for this technology include general cellular handset identification and access control. / MSc (Electrical and Electronic Engineering), North-West University, Potchefstroom Campus, 2015
67

INTERNET BASED FLEET MANAGEMENT USING GPS AND GSM/GPRS

Cangzhou, Yuan, Qishan, Zhang, Zhongkan, Liu 10 1900 (has links)
International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada / This paper presents the design and implementation of a large fleet management system, which is a true convergence solution of GPS, web-based GIS, GSM, GPRS and Internet technologies. The Short Message Service of the GSM is used to substitute the GPRS where GPRS is not available. A protocol stack including TCP/IP and PPP is implemented in vehicle unit to transmit data via Internet. A communication gateway is designed to distribute the location and control messages. The system tests confirm that the proposed scheme can perform a reliable management service for large fleets at low operating and maintaining costs.
68

Réalisation d'un assistant mobile expérimental pour usagers à besoins spéciaux

Ferrer, Alexandra January 2008 (has links)
L'ONU estime à 650 millions le nombre de personnes à besoins spéciaux, soit presque 11% de la population mondiale. En Europe, on estime à 1 million le nombre de personnes ne pouvant pas utiliser leurs doigts, à 12 millions ceux ayant une vue déficiente, et à 80 millions les personnes présentant des troubles de l'audition. La dernière décennie a vu un réel essor des technologies électroniques et informatiques miniaturisées, notamment avec la téléphonie cellulaire. Qu'en est-il réellement de l'accessibilité de ces technologies aux personnes présentant un handicap? Le projet dont il est question a pour but d'apporter un début de solution aux usagers avec besoins spéciaux, par le développement d'une plateforme cellulaire permettant l'ajout de périphériques adaptés et de fonctionnalités supplémentaires d'assistance. Cette plateforme expérimentale comprend ainsi un module GSM permettant le dialogue avec le réseau cellulaire, un module GPS permettant la géolocalisation de l'utilisateur, ainsi qu'un certain nombre de dispositifs adaptés, tels qu'un écran à fort contraste, un clavier à grosses touches et aides lumineuses, etc... Cette plateforme est prévue pour pouvoir recevoir d'autres fonctionnalités, tant matérielles (dans le but de l'adapter à davantage de personnes) que logicielles, afin de devenir un produit complet et répondant aux demandes des usagers à besoins spéciaux.
69

Sistema de Gestión de Diseño para el Core de una Red GPRS

Larraín Velásquez, Sebastián Alberto January 2008 (has links)
El objetivo del presente trabajo de título consiste en analizar el funcionamiento de una red GPRS, identificando sus componentes e interfaces principales, para luego proponer un sistema de gestión de diseño que permita evaluar el desempeño del core de la red de datos. Para poder proponer un sistema de gestión de diseño, se consideraron dos puntos. Por un lado, se requiere tener un conocimiento del estado actual de los componentes de la red, respecto a su capacidad y la caracterización de la calidad del servicio que se está entregando. Para esto, se proponen indicadores de calidad y de control, con sus respectivos umbrales, para poder conocer el desempeño de la red. Por otro lado, se propone un modelo predictivo basado en redes neuronales, para poder así, anticiparse a posibles limitaciones de capacidad futuras, de modo tal, que se pueda corregir y mantener así un servicio de calidad de acuerdo a los requerimientos. Se concluye, que con los indicadores propuestos y el modelo predictivo realizado, se puede tener una perspectiva de dimensionamiento y de caracterización de calidad, con lo que se puede ofrecer un servicio GPRS de buen desempeño.
70

Radio Localization with GSM / Radiolokalisering med GSM

Pålstam, Simon January 2016 (has links)
This thesis presents a feasibility study on unobtrusive localization of GSM en- abled cellphones using a Fake Base Station (FBS). An FBS is a radio transceiver that emulates the behaviour of a legitimate GSM Base Station (BS) to fool unal- tered cellphones to connect with it. This feasibility study investigates how an FBS can be utilized to estimate positions of connected cellphones in an area of interest. We present a proof of concept system that consists of a mobile FBS that measures the Time Of Arrival (TOA) and Received Signal Strength (RSS) to a cell- phone. The positions of the mobile FBS are determined with GPS. We employ calibration-free localization algorithms as we assume unknown environments and unknown hardware. Our experiments in an outdoor 180x100 m2 Line-Of- Sight (LOS) environment show that our calibration-free localization algorithms provide an average localization error less than 10 meters, which is sufficient for most applications of interest. In addition, our experiments show that RSS-based localization outperforms TOA-based localization when the average distance be- tween the FBS and cellphone is roughly 50 meters. Our experiments show that TOA-based localization outperforms RSS-based localization when the average dis- tance increases to roughly 75 meters. This research is part of the Smart Savannah project in which a wide range of different surveillance systems are developed to protect rhinos from poachers. We envision that our localization system can be used to detect and localize these poachers in an unobtrusive way. In addition, we envision that our localization sys- tem can be used in Search And Rescue (SAR) operations to estimate the positions of cellphones of missing persons. / Detta examensarbete undersöker möjligheten att lokalisera mobiltelefoner med GSM teknologi genom att använda en Falsk Basstation (FBS). En FBS är en radio transceiver som emulerar beteendet hos en legitim GSM basstation för att lura omodifierade mobiltelefoner att ansluta till den. Undersökningen tar reda på hur en FBS kan användas för att estimera positionerna av anslutna mobiltelefoner inom ett målområde. För att undersöka detta har ett Proof-Of-Concept-system ta- gits fram. Systemet består av en mobil FBS som som mäter propageringstid (TOA) och mottagen signalstyrka (RSS). FBS:ens positioner bestäms med GPS. Systemet använder kalibreringsfria algoritmer för lokalisering, då vi antar att miljön och mobiltelefonernas hårdvara är okänd. Tester av systemet har utförts utomhus i ett 180x100 m2 Line-Of-Sight-område. Dessa tester visar att lokaliseringsalgorit- merna ger ett genomsnittligt fel på mindre än 10 meter. Detta anses vara till- räckligt för de flesta tillämpningar av intresse. Utöver detta visar även testerna att RSS-baserad lokalisering ger bättre resultat än TOA-baserad lokalisering när medelavståndet mellan FBS och mobiltelefon är omkring 50 meter. TOA-baserad lokalisering ger däremot ett bättre resultat än RSS-baserad lokalisering när me- delavståndet ökar till omkring 75 meter. Denna undersökning är en del av Smart Savannah projektet som innefattar flera olika övervakningssystem, utvecklade för att skydda noshörningar från tjuv- skyttar. Målet med vårt lokaliseringssystem är att det ska kunna användas för att upptäcka och lokalisera tjuvskyttar utan deras vetskap. Vi tror även att lokalise- ringssystemet kan användas vid eftersökning- och räddnings-operationer för att lokalisera försvunna personers mobiltelefoner. / Project Ngulia

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