Global ETD Search

271	The adoption and use of SMS among Chinese teenagers Qiao, Qi 11 1900 (has links) Ce mémoire examine l'adoption des téléphones mobiles et l'utilisation des messages texte (SMS) par les adolescents chinois, selon la théorie des usages et gratifications et de la recherche sur la communication par ordinateur. Certains champs particuliers de l'utilisation des messages textes par les adolescents chinois, comme le contrôle parental, la circulation des chaînes de messages, la popularité des messages de salutations et l'utilisation répandue des émoticônes ont été étudiés. La fonction sociale des SMS, plus particulièrement des pratiques sociales et des relations émotionnelles des adolescents chinois, a également été explorée. Cette étude est basée sur un sondage réalisé sur le terrain auprès de 100 adolescents chinois. Elle révèle que chez les adolescents chinois, les deux principales raisons pour l'adoption du téléphone mobile sont l'influence parentale et le besoin de communication sociale. Quant à l'utilisation des messages texte, elle répond à sept usages et gratifications : la flexibilité, le coût modique, l’intimité, éviter l'embarras, le divertissement, l'engouement et l'évasion. Il a également été observé que les messages texte jouent un rôle positif dans la construction et l'entretien des relations sociales des adolescents chinois. / This thesis examined the adoption of mobile phones and use of SMS among Chinese teenagers based on the uses and gratification theory and computer-mediated communication research. Specific areas of Chinese teenagers’ SMS use, such as parental control, the circulation of chain messages, the popularity of greeting messages and the wide use of emoticons were studied. The social functions of SMS, especially in Chinese teenagers’ social-emotional practice, were explored as well. This study is based on a field survey conducted among one hundred Chinese teenagers. It reveals that, for Chinese teenagers, the two main reasons for the adoption of mobile phones are parental influence and the need for social communication; the use of SMS corresponds to seven uses and gratifications: flexibility, low cost, privacy, embarrassment avoidance, entertainment, fad and escape. SMS is also used by Chinese teenagers to build and maintain their social relationships. Les messages texte (SMS) Téléphone mobile Les adolescents chinois Usages et gratifications Communication par ordinateur Contrôle parental Chaînes de messages Émoticône SMS (short message system) Mobile phone Chinese teenagers Uses and gratifications theory (U&G) Computer-mediated communication (CMC) Parental control Chain message Emoticon
272	Kupní rozhodovací proces při výběru mobilního operátora / Buyer decision process in choice of mobile phone operator Grinová, Renáta January 2009 (has links) The aim of this diploma thesis is to analyze a buyer decision process of consumers in choice of mobile phone operator with a focus on individual. The diploma thesis is divided in six parts. The first and second parts focus on theory of marketing of services with an emphasis on services of mobile operators followed by consumer behavior. Next part covers problems of mobile phone operator's market. Next key part is buyer decision process of consumers in choice of mobile phone operator based on secondary (agency) data and based on results from analysis of a questionnaire. A summary of acquired results is compared to all phases of buyer decision process in sixth part. Comparing of results for picked customer segment with actual offer of mobile operators in Czech Republic is at the end of this thesis.
273	Simulink® Based Design and Implementation of a Solar Power Based Mobile Charger Mukka, Manoj Kumar 05 1900 (has links) Electrical energy is used at approximately the rate of 15 Terawatts world-wide. Generating this much energy has become a primary concern for all nations. There are many ways of generating energy among which the most commonly used are non-renewable and will extinct much sooner than expected. Very active research is going on both to increase the use of renewable energy sources and to use the available energy with more efficiency. Among these sources, solar energy is being considered as the most abundant and has received high attention. The mobile phone has become one of the basic needs of modern life, with almost every human being having one.Individually a mobile phone consumes little power but collectively this becomes very large. This consideration motivated the research undertaken in this masters thesis. The objective of this thesis is to design a model for solar power based charging circuits for mobile phone using Simulink(R). This thesis explains a design procedure of solar power based mobile charger circuit using Simulink(R) which includes the models for the photo-voltaic array, maximum power point tracker, pulse width modulator, DC-DC converter and a battery. The first part of the thesis concentrates on electron level behavior of a solar cell, its structure and its electrical model.The second part is to design an array of solar cells to generate the desired output. Finally, the third part is to design a DC-DC converter which can stabilize and provide the required input to the battery with the help of the maximum power point tracker and pulse width modulation. The obtained DC-DC converter is adjustable to meet the requirements of the battery. This design is aimed at charging a lithium ion battery with nominal voltage of 3.7 V, which can be taken as baseline to charge different types of batteries with different nominal voltages. Simulink(R) Simscape(TM) solar cell photovoltaic array maximum power point tracker pulse width modulator DC-DC converter Buck-Boost converter Lithium Ion Battery Mobile phone Controlled voltage source MATLAB(R) Computer Science Engineering, Electronics and Electrical SIMULINK. Cell phones -- Batteries. Solar cells.
274	Electromagnetic field and neurological disorders Alzheimer´s disease, why the problem is difficult and how to solve it Lyttkens, Peter January 2018 (has links) No description available. Alzheimer oxidative stress EMF microwave VGCC ACh protein refolding APOE big data FINGER wifi DECT AChE DNA-damage mobile phone glucose metabolism demyelinating antioxidant defence defective proteins non thermal effects Alzheimer risk pathophysiology mechanism amyloid pathologies multifactor strategy diet exercise cognitive training vascular risk management exposure sleep disturbance circadian dysfunction neuropsychiatric symptom risk assessments Neurosciences Neurovetenskaper
275	Antenna Shape Synthesis Using Characteristic Mode Concepts Ethier, Jonathan L. T. 26 October 2012 (has links) Characteristic modes (CMs) provide deep insight into the electromagnetic behaviour of any arbitrarily shaped conducting structure because the CMs are unique to the geometry of the object. We exploit this very fact by predicting a perhaps surprising number of important antenna metrics such as resonance frequency, radiation efficiency and antenna Q (bandwidth) without needing to specify a feeding location. In doing so, it is possible to define a collection of objective functions that can be used in an optimizer to shape-synthesize antennas without needing to define a feed location a priori. We denote this novel form of optimization “feedless” or “excitation-free” antenna shape synthesis. Fundamentally, we are allowing the electromagnetics to dictate how the antenna synthesis should proceed and are in no way imposing the physical constraints enforced by fixed feeding structures. This optimization technique is broadly applied to three major areas of antenna research: electrically small antennas, multi-band antennas and reflectarrays. Thus, the scope of applicability ranges from small antennas, to intermediate sizes and concludes with electrically large antenna designs, which is a testament to the broad applicability of characteristic mode theory. Another advantage of feedless electromagnetic shape synthesis is the ability to synthesize antennas whose desirable properties approach the fundamental limits imposed by electromagnetics. As an additional benefit, the feedless optimization technique is shown to have greater computational efficiency than traditional antenna optimization techniques. Characteristic Mode Electrically Small Antenna Multi-band Antenna Reflectarray Mosaic Antenna Shape Synthesis Feedless Shape Synthesis Fragmented Antenna Eigenanalysis Bandwidth Radiation Efficiency Resonance Frequency Antenna Geometry Mobile Phone Sub-Structure Characteristic Modes Periodic Structures Transmission Coefficient Reflection Coefficient Single Mode Ultrawideband Antenna Q
276	The adoption and use of SMS among Chinese teenagers Qiao, Qi 11 1900 (has links) Ce mémoire examine l'adoption des téléphones mobiles et l'utilisation des messages texte (SMS) par les adolescents chinois, selon la théorie des usages et gratifications et de la recherche sur la communication par ordinateur. Certains champs particuliers de l'utilisation des messages textes par les adolescents chinois, comme le contrôle parental, la circulation des chaînes de messages, la popularité des messages de salutations et l'utilisation répandue des émoticônes ont été étudiés. La fonction sociale des SMS, plus particulièrement des pratiques sociales et des relations émotionnelles des adolescents chinois, a également été explorée. Cette étude est basée sur un sondage réalisé sur le terrain auprès de 100 adolescents chinois. Elle révèle que chez les adolescents chinois, les deux principales raisons pour l'adoption du téléphone mobile sont l'influence parentale et le besoin de communication sociale. Quant à l'utilisation des messages texte, elle répond à sept usages et gratifications : la flexibilité, le coût modique, l’intimité, éviter l'embarras, le divertissement, l'engouement et l'évasion. Il a également été observé que les messages texte jouent un rôle positif dans la construction et l'entretien des relations sociales des adolescents chinois. / This thesis examined the adoption of mobile phones and use of SMS among Chinese teenagers based on the uses and gratification theory and computer-mediated communication research. Specific areas of Chinese teenagers’ SMS use, such as parental control, the circulation of chain messages, the popularity of greeting messages and the wide use of emoticons were studied. The social functions of SMS, especially in Chinese teenagers’ social-emotional practice, were explored as well. This study is based on a field survey conducted among one hundred Chinese teenagers. It reveals that, for Chinese teenagers, the two main reasons for the adoption of mobile phones are parental influence and the need for social communication; the use of SMS corresponds to seven uses and gratifications: flexibility, low cost, privacy, embarrassment avoidance, entertainment, fad and escape. SMS is also used by Chinese teenagers to build and maintain their social relationships. Les messages texte (SMS) Téléphone mobile Les adolescents chinois Usages et gratifications Communication par ordinateur Contrôle parental Chaînes de messages Émoticône SMS (short message system) Mobile phone Chinese teenagers Uses and gratifications theory (U&G) Computer-mediated communication (CMC) Parental control Chain message Emoticon
277	Fast Low Memory T-Transform: string complexity in linear time and space with applications to Android app store security. Rebenich, Niko 27 April 2012 (has links) This thesis presents flott, the Fast Low Memory T-Transform, the currently fastest and most memory efficient linear time and space algorithm available to compute the string complexity measure T-complexity. The flott algorithm uses 64.3% less memory and in our experiments runs asymptotically 20% faster than its predecessor. A full C-implementation is provided and published under the Apache Licence 2.0. From the flott algorithm two deterministic information measures are derived and applied to Android app store security. The derived measures are the normalized T-complexity distance and the instantaneous T-complexity rate which are used to detect, locate, and visualize unusual information changes in Android applications. The information measures introduced present a novel, scalable approach to assist with the detection of malware in app stores. / Graduate Kolmogorov complexity Lempel Ziv T-codes flott Fast T-decomposition ftd mobile computing Lempel-Ziv complexity LZ complexity LZ78 LZ77 LZ76 LZW normalized information distance NID normalized compression distance NCD McCreight Ukkonen phylogenetics phylogenetic tree Gemini Droiddream Apple iOS iPhone iPad mobile phone open source Apache License 2.0
278	Mobile Reisebegleitung mit NFC-Unterstützung Pfanstiel, Jörn, Keller, Christine, Funke, Alexandra, Heinig, Tristan, Schlegel, Thomas 14 December 2012 (has links) (PDF) Die zunehmende Nutzung [1] persönlicher mobiler Geräte durch immer mehr Fahrgäste des öffentlichen Personenverkehrs (ÖPV) begünstigt die Entwicklung neuer Applikationen, die den allgegenwärtigen Zugriff auf domänenspezifische Inhalte und Echtzeitdaten über variable Schnittstellen und Informationskanäle realisieren. Near Field Communication (NFC) gilt in diesem Zusammenhang als eine vielversprechende Technologie, die neben kontaktloser Datenübertragung auch Bezahlvorgänge direkt über das mobile Endgerät ermöglicht. Mit Blick auf die unterschiedlichen Einsatzmöglichkeiten von NFC in der mobilen Reisebegleitung wird in diesem Beitrag eine ikonografische Klassifikation für die visualisierte Analyse von Anwendungsszenarien vorgestellt, welche zur Planung ubiquitärer Applikationen im ÖPV eingesetzt werden kann. Konferenz GeNeMe 2012 Neue Medien öffentlichen Personenverkehr ÖPN Smartphone-App mobile Endgerätt Tablet-Computer NFC-Chip conference new media social media web 2.0 community Social Media Networks Research Communities Virtual Enterprisesm public transport near field communication NFC smart phone mobile phone tablet ddc:330 rvk:QR 760
279	Business strategies of organisations in a challenging economy : the case of mobile company X Zimbabwe (MCXZ) Mungwini, Mercy 06 1900 (has links) This study sought to establish the business strategies employed by Mobile Company X Zimbabwe (MCXZ) for it to survive the challenging economy. A qualitative research and a case-based approach involving MCXZ were used. Semi-structured interviews and secondary data were used to produce qualitative data and for triangulation of findings. Data was analysed and managed through qualitative coding and Atlas.ti program. The findings of the study showed that MCXZ employed growth business strategies through market penetration, product development, market development and strategic alliances. In addition, the study found that banking crisis, high competition, rapid technological changes, consumer preferences, shrinking markets and unfavourable government policies are the main threats in the challenging economy. However, MCXZ managed to survive and grow due to the integration of business strategies and the key success factors (KSF) in the industry. The KSF are organisational agility, research and development, quality and affordable mobile phones and effective after sales service and accessories. / Business Management / M. Com. (Business Management) Business strategies Growth strategies Survival business strategies Corporate business strategies Challenging economy Government policies Banking crisis Competition Organisational agility Mobile phone technology 338.7096891 Competition -- Zimbabwe -- Case studies
280	Moderní nedrogové závislosti / Modern nondrug addictions ČÁSLAVOVÁ, Miroslava January 2010 (has links) My diploma thesis is both theoretical and empirical. It deals with modern nondrug addictions which are not yet classified as addictions according to the International Classification of Diseases, but their symptoms and common characteristics with recognised addictions allow us to label them as such. The theoretical part of my thesis concerns mainly a definition of these addictions, their typical symptoms, prevention and therapy. The practical part contains tables derived from the results of research carried out in the form of questionnaire surveys. One questionnaire was designed for adults,another for children and youth adults. Both aim to monitor the occurrence of modern addictions in today's population. The practical part also contains a questionnaire which confirmed or disconfirmed a suspicion of workaholism in the case of two selected persons. The appendixes to my thesis contains all the mentioned questionnaires and a case study of a person cured from a gambling addiction. The appendixes also contain graphs supplementing the practical part of the thesis, a list of rehabilitation institutions where individual addictions can be treated as well as contact information of various workplaces which provide help and counselling.

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