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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.
11

AppRecommender: um recomendador de aplicativos GNU/Linux / AppRecommender: a recommender system for GNU/Linux applications

Araujo, Tássia Camões 30 September 2011 (has links)
A crescente oferta de programas de código aberto na rede mundial de computadores expõe potenciais usuários a muitas possibilidades de escolha. Em face da pluralidade de interesses desses indivíduos, mecanismos eficientes que os aproximem daquilo que buscam trazem benefícios para eles próprios, assim como para os desenvolvedores dos programas. Este trabalho apresenta o AppRecommender, um recomendador de aplicativos GNU/Linux que realiza uma filtragem no conjunto de programas disponíveis e oferece sugestões individualizadas para os usuários. Tal feito é alcançado por meio da análise de perfis e descoberta de padrões de comportamento na população estudada, de sorte que apenas os aplicativos considerados mais suscetíveis a aceitação sejam oferecidos aos usuários. / The increasing availability of open source software on the World Wide Web exposes potential users to a wide range of choices. Given the individuals plurality of interests, mechanisms that get them close to what they are looking for would benefit users and software developers. This work presents AppRecommender, a recommender system for GNU/Linux applications which performs a filtering on the set of available software and individually offers suggestions to users. This is achieved by analyzing profiles and discovering patterns of behavior of the studied population, in a way that only those applications considered most prone to acceptance are presented to users.
12

Detection and Classification of Interference in Mobile Communication Systems / Detektion och klassificering av störningar i mobila kommunikationssystem

Ring, Christoffer January 2015 (has links)
The usage of wireless technology has in the past decade vastly increased and it continues to do so as well. Because of this, we become more and more reliant on this considerably fragile technology. Wireless technology, which uses radio waves to transmit data from one point to another can easily be interfered by radio jammers. This thesis work is about the detection and classification of the interference that is produced by jammers over the Global System for Mobile Communications (GSM) air interface. A typical GSM jammer that can be found on the Internet is analyzed but also more advanced GSM jammers are analyzed. The GSM standard is analyzed to find vulnerabilities that a jammer can take advantage of. The result is an interference detector that can be used to detect and classify interference over the GSM networks. The detector is constructed with an Universal Software Radio Peripheral (USRP) but is also portable to other software-defined radio (SDR) platforms.
13

AppRecommender: um recomendador de aplicativos GNU/Linux / AppRecommender: a recommender system for GNU/Linux applications

Tássia Camões Araujo 30 September 2011 (has links)
A crescente oferta de programas de código aberto na rede mundial de computadores expõe potenciais usuários a muitas possibilidades de escolha. Em face da pluralidade de interesses desses indivíduos, mecanismos eficientes que os aproximem daquilo que buscam trazem benefícios para eles próprios, assim como para os desenvolvedores dos programas. Este trabalho apresenta o AppRecommender, um recomendador de aplicativos GNU/Linux que realiza uma filtragem no conjunto de programas disponíveis e oferece sugestões individualizadas para os usuários. Tal feito é alcançado por meio da análise de perfis e descoberta de padrões de comportamento na população estudada, de sorte que apenas os aplicativos considerados mais suscetíveis a aceitação sejam oferecidos aos usuários. / The increasing availability of open source software on the World Wide Web exposes potential users to a wide range of choices. Given the individuals plurality of interests, mechanisms that get them close to what they are looking for would benefit users and software developers. This work presents AppRecommender, a recommender system for GNU/Linux applications which performs a filtering on the set of available software and individually offers suggestions to users. This is achieved by analyzing profiles and discovering patterns of behavior of the studied population, in a way that only those applications considered most prone to acceptance are presented to users.
14

Zabezpečení operačního systému Linux / Security of Linux OS

Polách, Milan January 2011 (has links)
This thesis is focused on the possibility of better networking security operating system GNU/Linux with an appropriate set of rules Netfilter. There was established a program to allow easy configuration of rules for IP Address versions 4 and 6. This program not only allows to set individual rules, but also interfere with the newly required service and decide, how it will be further worked with. The first is the theoretical part describes the network communication with the model TCP/IP, the following is the introduction of Netfilter and outlining the local security. The practical part describes the various technologies and methods used for programming. The result of this work is easy to use program to set firewall rules for IP Address versions 6 with the possibility of deciding on the new established network traffic. The program is designed for new users of the operating system, who want to better secure their computer without the knowledge of Netfilter.
15

A pedagogia da migração do software proprietário para o livre: uma perspectiva freiriana. / The pedagogy of migration from proprietary software to free software: a freirian perspective.

Alencar, Anderson Fernandes de 26 September 2007 (has links)
Esta dissertação é resultado do trabalho de pesquisa no intuito de refletir acerca de uma proposta de migração do software proprietário para o software livre que contemple elementos do pensamento do filósofo Álvaro Vieira Pinto e do educador Paulo Freire. O trabalho discute, como fundamentos teóricos, as contribuições de Álvaro Vieira Pinto e Paulo Freire para o estado da arte da tecnologia no presente contexto por meio de suas reflexões acerca do conceito de técnica e tecnologia, das diversas atitudes frente à tecnologia, da crítica à dependência tecnológica, da apresentação da tecnologia como patrimônio da humanidade, na reflexão sobre uma possível \"práxis tecnológica\", de uma tecnologia a serviço das causas de emancipação e mudança social e na defesa por uma concepção de infoinclusão. O software livre também é apresentado como uma alternativa viável e coerente com o sonho de um outro mundo possível. São apresentados, ainda, o seu histórico e evolução, as razões filosóficas, técnicas e econômicas para o seu uso, as suas limitações e o software livre como movimento social. Como metodologia foi escolhido o estudo de caso da experiência de migração para software livre do Instituto Paulo Freire, instituição que Freire acompanhou desde a sua fundação. O pesquisador foi capaz de acompanhar toda a gênese da proposta, sua maturação, seu desenvolvimento e uma de suas últimas ações, não sendo possível acompanhar a experiência até o seu término por limitações temporais. Toda a experiência foi relatada nesta dissertação. No intuito de angariar elementos que viessem a dar corpo para uma nova proposta de migração e para a reflexão da própria experiência vivida, foram submetidos questionários aos migrantes, os quais deram fortes contribuições para se repensar a experiência bem como para pensar uma nova. Ao final, foi possível concluir que a experiência do Instituto está de acordo com os princípios freirianos que defende, que a experiência de migração para software livre é uma experiência essencialmente pedagógica, daí o necessário envolvimento dos educadores e o imprescindível papel da formação em todas as práticas da migração. / This dissertation is the result of research work aimed at considering a migration proposal from proprietary software to a free software that addresses elements of the thoughts of both philosopher Álvaro Vieira Pinto and educator Paulo Freire. This work discusses, as theoretical beddings, the contributions of Álvaro Vieira Pinto and Paulo Freire to the art of technology in the current context by considering their thoughts on technique and concepts of technology; various attitudes with respect to technology; criticism of technological dependence; and technology as a patrimony of humanity, a possible \"technological praxis\", a source of emancipation and social change, and a defense of an info-inclusion concept. Free software is also presented as a viable and coherent alternative, holding the dream of another possible world. Its description and evolution are presented, as well as philosophical, economical and technical reasons for its use, its limitations, and free software as a social movement. Concerning methodology, the Instituto Paulo Freire, institution Paulo Freire followed since its foundation, was chosen as a case study for the experiment of the migration to free software. The researcher participated in the experiment from the beginning of the proposal, and during its maturation, development and last actions. However, he was not able to participate in the experiment to the end due to time limitations. The entire experiment is reported in this research report. With the intent of acquiring elements that would bring strength to a new migration proposal and to an understanding of the experiment itself, questionnaires were submitted to all migrants, whose answers brought important contributions to the experiment. It was concluded that the Instituto Paulo Freire experiment was completed in accordance with the Freirian principles it defends. The migration experiment for free software is an essentially pedagogical experiment. This is why the participation of educators and expertise are essential for the migration.
16

A pedagogia da migração do software proprietário para o livre: uma perspectiva freiriana. / The pedagogy of migration from proprietary software to free software: a freirian perspective.

Anderson Fernandes de Alencar 26 September 2007 (has links)
Esta dissertação é resultado do trabalho de pesquisa no intuito de refletir acerca de uma proposta de migração do software proprietário para o software livre que contemple elementos do pensamento do filósofo Álvaro Vieira Pinto e do educador Paulo Freire. O trabalho discute, como fundamentos teóricos, as contribuições de Álvaro Vieira Pinto e Paulo Freire para o estado da arte da tecnologia no presente contexto por meio de suas reflexões acerca do conceito de técnica e tecnologia, das diversas atitudes frente à tecnologia, da crítica à dependência tecnológica, da apresentação da tecnologia como patrimônio da humanidade, na reflexão sobre uma possível \"práxis tecnológica\", de uma tecnologia a serviço das causas de emancipação e mudança social e na defesa por uma concepção de infoinclusão. O software livre também é apresentado como uma alternativa viável e coerente com o sonho de um outro mundo possível. São apresentados, ainda, o seu histórico e evolução, as razões filosóficas, técnicas e econômicas para o seu uso, as suas limitações e o software livre como movimento social. Como metodologia foi escolhido o estudo de caso da experiência de migração para software livre do Instituto Paulo Freire, instituição que Freire acompanhou desde a sua fundação. O pesquisador foi capaz de acompanhar toda a gênese da proposta, sua maturação, seu desenvolvimento e uma de suas últimas ações, não sendo possível acompanhar a experiência até o seu término por limitações temporais. Toda a experiência foi relatada nesta dissertação. No intuito de angariar elementos que viessem a dar corpo para uma nova proposta de migração e para a reflexão da própria experiência vivida, foram submetidos questionários aos migrantes, os quais deram fortes contribuições para se repensar a experiência bem como para pensar uma nova. Ao final, foi possível concluir que a experiência do Instituto está de acordo com os princípios freirianos que defende, que a experiência de migração para software livre é uma experiência essencialmente pedagógica, daí o necessário envolvimento dos educadores e o imprescindível papel da formação em todas as práticas da migração. / This dissertation is the result of research work aimed at considering a migration proposal from proprietary software to a free software that addresses elements of the thoughts of both philosopher Álvaro Vieira Pinto and educator Paulo Freire. This work discusses, as theoretical beddings, the contributions of Álvaro Vieira Pinto and Paulo Freire to the art of technology in the current context by considering their thoughts on technique and concepts of technology; various attitudes with respect to technology; criticism of technological dependence; and technology as a patrimony of humanity, a possible \"technological praxis\", a source of emancipation and social change, and a defense of an info-inclusion concept. Free software is also presented as a viable and coherent alternative, holding the dream of another possible world. Its description and evolution are presented, as well as philosophical, economical and technical reasons for its use, its limitations, and free software as a social movement. Concerning methodology, the Instituto Paulo Freire, institution Paulo Freire followed since its foundation, was chosen as a case study for the experiment of the migration to free software. The researcher participated in the experiment from the beginning of the proposal, and during its maturation, development and last actions. However, he was not able to participate in the experiment to the end due to time limitations. The entire experiment is reported in this research report. With the intent of acquiring elements that would bring strength to a new migration proposal and to an understanding of the experiment itself, questionnaires were submitted to all migrants, whose answers brought important contributions to the experiment. It was concluded that the Instituto Paulo Freire experiment was completed in accordance with the Freirian principles it defends. The migration experiment for free software is an essentially pedagogical experiment. This is why the participation of educators and expertise are essential for the migration.
17

The evolution of the black wildebeest, Connochaetes gnou, and modern large mammal faunas in central Southern Africa /

Brink, J. S. January 2005 (has links)
Dissertation (DPhil)--University of Stellenbosch, 2005. / Bibliography. Also available via the Internet.
18

Intelligent Spectrum Sensor Radio

Mian, Omer 12 August 2008 (has links)
No description available.
19

SOFT RECOVERY RECORDING SYSTEM FOR INTERIOR AND EXTERIOR BALLISTICS CHARACTERIZATION

Guevara, Mauricio, Flyash, Boris 10 1900 (has links)
ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / The US ARMY, ARDEC; in cooperation with AMCOM AMRDEC, Missile Guidance and Engineering Directorates; the Office of Naval Research; Naval Surface Fire Support; and the Naval Surface Weapon Center, requires multiphase development of a common, low-cost, high G survivable, high accuracy, Micro Electro-Mechanical Systems (MEMS) Inertial Measurement Unit (IMU) and Common, Deeply Integrated, Guidance and Navigation Unit (DI-GNU) for DoD gun launched guided munition and missile applications. The challenge for the Precision Munition Instrumentation Division (PMID) was to develop a Telemetry System to record the interior and exterior ballistics of a M831 TP-T projectile, which will be used as a carrier for soft recovery testing of IMUs and GNUs. This valuable data that would help The Government and contractors develop and validate multiple MEMS IMU design efforts, culminating with live fire verification performance test of pre-production in the Army’s 155-mm Soft Recovery Vehicle (SRVs) and missiles airframes.
20

FMCW radar implemented with GNU Radio Companion

Zhu, Qizhao, Wang, Yaqi January 2016 (has links)
Continuous-wave frequency-modulated radar, or FMCW radar, is simple in design, small in size and weight and uses low transmitting power. The range resolution depends on the bandwidth. FMCWradar is used in applications ranging from guided weapons systems to vehicle collision avoidance systems. Measuring the distance to the target is the essential feature of FMCW radar. Firstly, this thesis introduces the basic structure of the FMCW radar and the principle formeasuring distance. Secondly, by using software-dened radio (SDR),FMCW radar can be implemented and congured with a reduced costand complexity. In this report, the radar is implemented by means ofthe software GNU Radio Companion with a test signal. HackRF may be used in future work with an osmocom source instead of the testsignal.

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