Dissertations / Theses on the topic '220103 Mobile technologies and communications'
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1
Izhac, Abdurrahman. "THz technologies and models for mobile communications." Thesis, University of Reading, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494157.
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This thesis investigates the feasibility of deploying mobile communication networks at the THz frequency range. Three areas were identified as the major issues on the way towards realising a functional THz mobile communication system: the high atmospheric attenuation levels and obstacle shadowing at the THz range, the deficiency in THz devices suitable for mobile telecommunications and the availability of reliable models for the analysis and design of THz radio networks.
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Moss, Jonathan G. O. "Spread spectrum technologies for future communications systems." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285021.
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Ansari, Shahzad Mumtaz. "Essays on the making of a market : resources, technologies and social construction : insights from mobile communications." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616217.
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Iraba, Marie Louise. "Inexpensive mobile technologies to empower rural farmers with m-agriculture." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_9526_1370595447.
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Market information and established communication between seller and buyer play an important role in business activities. This thesis investigates the Transkei area in the Eastern Cape
Province, South Africa to find out how to empower rural farmers by providing them with less-expensive mobile technology enabling them to post and advertise their produce, access market
information on a common database, and find and communicate with potential customers. The farmers&rsquo
requirements were identified using quantitative and qualitative methods and a prototype
consisting of USSD and web applications was developed. It allows the farmer to follow a sequence of menu commands to send a request to the database and access market information, such
as commodity prices, and post information about their own produce so as to attract more customers. The low cost of USSD and the ubiquity of mobile phones enable the system to be usable, affordable and effective. During the final stage of development, the system was tested successfully and addressed a major problem faced by farmers, i.e. lack of access to market information.
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Leemaqz, Kaleb Lee. "Privacy of RFID - models and protocols." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/60900/1/Kaleb_Leemaqz_Thesis.pdf.
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Radio Frequency Identification is a wireless identification method that utilizes the reception of electromagnetic radio waves. This research has proposed a novel model to allow for an in-depth security analysis of current protocols and developed new flexible protocols that can be adapted to offer either stronger security or better efficiency.
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Sheriff, Ray E. "The 2009 Electronics and Telecommunications Research Seminar Series: 8th Workshop Proceedings." University of Bradford, 2009. http://hdl.handle.net/10454/3559.
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YesThis is the eighth workshop to be organised under the postgraduate programmes in electrical and electronic engineering (EEE). The workshop concludes the Research Seminar Series, which has provided a platform for disseminating the latest research activities in related technologies through its weekly seminars. The EEE courses cover a broad range of technologies and this is reflected in the variety of topics presented during the workshop. In total, thirty-three papers have been selected for the proceedings, which have been divided into seven sections. The workshop aims to be as close to a `real¿ event as possible. Hence, authors have responded to a Call for Papers with an abstract, prior to the submission of the final paper. This has been a novel experience for many, if not all of the contributors. Clearly, authors have taken up the challenge with enthusiasm, resulting in what promises to be an interesting and informative workshop.
7
Berangi, Reza. "Co-channel interference cancellation in mobile cellular communication systems." Thesis, 1998. https://vuir.vu.edu.au/15437/.
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In recent years, mobile communications has become very popular and the demand for its services has increased dramatically. The capacity of mobile communication systems is mainly limited by co-channel interference caused by frequency reuse. The acceptable co-channel interference at the receiver determines the minimum allowable distance
between adjacent co-channel users and hence the system capacity. One approach to increase the capacity is to employ co-channel interference resistant receivers. The
research work presented in this thesis deals with the designing of such receivers for cellular mobile communication systems.
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Chan, Pauline M. L., X. Liang, Felicia Li Chin Ong, and Prashant Pillai. "Fusion of Digital Television, Broadband Internet and Mobile Communications Part I: Enabling Technologies." 2007. http://hdl.handle.net/10454/2671.
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NoIt is the first part of a tutorial which aims to provide an introduction to the current state-of-the art of Digital Video Broadcasting standards over satellite and its fusion with mobile and Internet technologies. It provides an overview of the different technologies and issues that facilitates better understanding of the current and future operational scenarios, focusing on the available DVB and IP technologies.
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Gammon, Mark A. "Persistently present: College students, social-mobile technologies, and the transformation of social life." 2009. https://scholarworks.umass.edu/dissertations/AAI3359896.
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Persistently Present argues that we need to more fully reassess our thinking about the relationship(s) between social connectedness and technologically mediated forms of communication (particularly social-mobile technologies). Noting that contemporary social life is marked by connections that are more flexible, accessible, negotiable, and persistent because communication opportunities are nearly constant, I argue that social-mobile technologies are shifting and reconfiguring the ways that students build and maintain their social relationships. Within this environment social-mobile technologies are effectively serving as tools of social extensibility , allowing individuals to expand, enhance, and extend their social presence. As a result, these technologies are altering the when, where, and how (contexts) of contemporary connectedness and interactions. The concept of social extensibility is investigated across four important and interdependent areas that emerged in my data and the related literature: connectivity, virtual spaces, non-spaces, and expressiveness.
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Zonoozi, Mahmood Mohseni. "Handover in digital cellular mobile communication systems." Thesis, 1997. https://vuir.vu.edu.au/15348/.
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A mathematical formulation is developed for systematic tracking of the random movement of a mobile station in a cellular environment. It incorporates mobility
parameters under generalized conditions, so that the model could be tailored to be applicable in most cellular environments. This model is then used to characterisendifferent mobility-related traffic parameters in a cellular system. These include the
cell residence time of both new and handover calls, channel holding time and the
average number of handovers per call. It is shown that the cell residence time can be
described by the generalized gamma distribution, while the channel holding time can
be best approximated by the negative exponential distribution. Based on these
findings a teletraffic model that takes the user mobility into account is presented and
is substantiated using a computer simulation. Further, the influence of cell size on
new and handover call blocking probabilities is examined. The effect of the handover
channel reservation on call dropout probability is also examined to determine the
optimum number of reserved channels required for handover. Improvement to
handover performance is investigated in terms of reduction in the number of
unnecessary handovers as well as reduction in handover delay time. For this purpose
an analytical method is developed which determines the optimum hysteresis level
and the signal averaging time under shadow fading. The results are applicable in both
micro- and macro-cellular systems.
11
Calvo, Ignacio. "Étude empirique du contexte d’utilisation des interfaces de vidéocommunication mobile." Thèse, 2014. http://hdl.handle.net/1866/11871.
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Ce document présente les résultats d’une étude empirique sur l’utilisation de la vidéoconférence mobile selon le contexte de l’usager afin de proposer des lignes directrices pour la conception des interfaces des dispositifs de communication vidéo mobile. Grâce à un échange riche d’informations, ce type de communication peut amener un sentiment de présence fort, mais les interfaces actuelles manquent de flexibilité qui permettrait aux usagers d’être créatifs et d’avoir des échanges plus riches lors d’une vidéoconférence.
Nous avons mené une recherche avec seize participants dans trois activités où leurs conversations, leurs réactions et leurs comportements ont été observés. Deux groupes de discussion ont aussi servi à identifier les habitudes développées à partir de leur utilisation régulière de la vidéoconférence. Les résultats suggèrent une différence importante entre l’utilisation de la caméra avant et la caméra arrière de l’appareil mobile, et la nécessité de fournir des outils qui offrent plus de contrôle sur l’échange dans la conversation. L’étude propose plusieurs lignes directrices de conception pour les interfaces de communication vidéo mobiles, concernant la construction du contexte mobile de l’utilisateur.This paper presents an exploratory empirical study of mobile videoconferencing according to user’s context in order to suggest guidelines for the improvement of the user interface in mobile video communication devices. Through rich exchange of information, mobile video communication can provide a better sense of presence than other means of communication. Yet the current mobile interfaces lack flexibility to be creative and have more meaningful exchanges in a videoconference. We conducted observations with sixteen participants in three activities where their conversations, reactions and behaviours were observed. Two focus groups were used to identify habits formed from regular use. Results suggest an important difference between using the front-facing or back-facing camera and a clear need for tools that provide more control over the video exchange. From these results, the study proposes several design guidelines for mobile video communication interfaces, respecting the construction of the user’s mobile context.
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Lin, Ping-Shan, and 林炳杉. "The Design and Development of Customized Computer Room Environment Monitoring and Alarm System by the Integration of Internet and Mobile Communications Technologies." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/01506982473958959148.
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碩士國立勤益科技大學
電子工程系
98
In the days of Internet applications environment changes rapidly; while a variety of new information security technology has been continuously developed for reference applications, nevertheless the information security hazards incident is still existed and reported. Restated, the information security issue is difficult to be deterred. Computer room is the core place for IT infrastructure, is the most fundamental aspect of ensuring information security. Therefore, a good computer room maintenance management is necessary. Restated, providing more convenient, auditable and alarm management mechanism is required to fulfill the physical security of the environment and to further enhance the information security. In this study, a customized computer room environment monitoring and alarm system based on the integration of Internet, mobile communications and monitoring is proposed and developed. The operation status of the systems such as air conditioner, electricity and so forth in computer room are detected via different sensors, and then collected by the programmable logic controller. Meanwhile, a designed and developed management system is applied to monitor the running time data status of the subject target, to store the events of all monitored systems and to issue alarm or warning messages for happened abnormal situation. The experiment results demonstrate that the proposed computer room environment monitoring and alarm system is applicable for most enterprises in the computer room and further to promote the information security. Moreover, through the proposed customized computer room environment monitoring and alarm system to help enterprises to eliminate the impact of potential risks is the ultimate goal of this study.
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Veljanovski, Ronny. "A reconfigurable root raised cosine filter for a mobile receiver." Thesis, 2003. https://vuir.vu.edu.au/15280/.
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Over the last decade, the growth of second generation (2G) digital communications has been explosive. Now wireless communications is evolving to third generation (3G),where it will offer wideband data services and multimedia wideband products and services such as video conferencing and high speed Internet over a mobile phone. Amid these high-tech feature packed mobile devices, there is a major bottleneck of cost. The major cost factor in mobile devices is battery life.
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Al-Busaidi, Hamed Ahmed Saud. "A model of intention to use mobile government services." Thesis, 2012. https://vuir.vu.edu.au/21309/.
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The aim of this research was to develop and validate a model which was designed to be useful for many countries considering delivery of mobile government (m-Government) services as the literature had not revealed any comprehensive model that is specifically used in the m-Government services context. The existence of this gap encouraged this research to empirically test and validate the combination of the Diffusion of Innovations (DOI) model and the Technology Acceptance Model (TAM) as well as external variables including Perceived Security, Perceived Trustworthiness, Perceived Enjoyment and Personal Innovativeness. Therefore, in order to fill the gap, this research developed a validated Model with relevant hypotheses which was tested for its predictive value.
15
Penev, Vladimir. "Noise blanker for land mobile radio systems." Thesis, 1995. https://vuir.vu.edu.au/18203/.
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The field of private mobile radio systems (taxis, police, emergency services, dispatch
systems etc.) is undergoing accelerated change and deregulation. More users,
demanding more services with better quality, are squeezed into the same bandwidth.
However, noise and impulsive noise levels on the radio path are increasing and this
reduces quality. This project seeks to use advanced signal processing to develop a
generic noise blanking technique suitable for a new generation of mobile radio
equipment to be developed by Motorola Australia.
The project involves an analysis of impulsive noise sources (car ignitions, overhead
powerlines etc), a review of existing noise blanking techniques, which will then lead
to the development of an appropriate noise blanking technique suitable for the
impending deregulated environment. The method chosen used a surface acoustic
wave delay filter (SAW) and a balanced blanker switch. It outperformed the pervious
noise blanker in both bench and field tests. The shape of the blanking pulse was found
to be critical for good blanker performance.
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Stojcevski, Aleksandar. "Fuzzy technology application for mobile positioning in cellular communication." Thesis, 2000. https://vuir.vu.edu.au/18213/.
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In engineering systems there is generally two classes of knowledge: objective knowledge,
which can be quantified using the laws of traditional mathematics, and subjective or
intelligent knowledge, that cannot be modeled mathematically but can be expressed in
linguistical terms. Fuzzy Logic (FL) is a method that combines these two forms of
knowledge, and as such provides a powerful tool for solving real engineering problems.
A fuzzy logic system (FLS) is the methodology of applying FL to engineering systems.
In general, a FLS can be considered as a non-linear mapping of crisp (firm) input data to
crisp output data. It is the inclusion of subjective knowledge in a FLS that leads to a
plethora of mapping possibilities, which may not be possible using traditional
mathematical modeling techniques. A fuzzy logic system consists of four main elements:
fuzzification, rule based, inference engine and deffuzification.
Fuzzy logic has been successfully adopted in many real-world automatic control systems
including automobile transmission, subway systems, industrial robots, washing machines,
cameras and air-conditioners. In contrast, the utilization of fuzzy logic in mobile
communications systems is recent and limited. Understanding general mobile
communications is essential in order to go on and develop a mobile positioning
application.
The successful applications of Fuzzy Logic Control (FLC) techniques in many areas draw
a huge amount of attention to its industrial applications. However, lack of structured
methods and tools for design and analysis is preventing this revolutionary controller from
playing a more significant role in mobile communications.
A methodology to construct and analyse a FL controller to be used in mobile positioning
would significantly improve the efficiency of FLC design, increase the quality of FLC by
allowing the designer to develop and design the controller based on some specifications
and requirements, and then validate that design.
17
Stojcevski, Aleksandar. "A reconfigurable analog-to-digital converter for a mobile receiver." Thesis, 2004. https://vuir.vu.edu.au/15363/.
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The evolution of new telecommunication standards is increasingly leaning towards higher data transmission rates. The boundaries between digital and analog signal
processing is impending closer to the antenna, therefore aiming for a software-defined radio solution. In terms of analog-to-digital converters (ADCs) of mobile terminal
receivers, this indicates higher sample rate, lower power consumption and higher resolution. With comparison to other ADCs, the pipelined ADC architecture has most successfiilly covered the wide resolution limits and data rate requirements of these terminal receiver architectures. However, even though fix word-length pipeline ADC
architecture could be a suitable device for the mobile receiver, it still has a distinct disadvantage when it comes to power consumption. In this thesis, the requirements of ADC of the mobile receiver architecture are studied and analysed using the system specifications of the 3rd Generation (3G) Wideband Code Division Multiple Access (WCDMA) standard.
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Leon, Ayala Sandra Caterine. "Les personnes âgées face au défi d'utilisation des nouvelles technologies : étude de l’utilisabilité des interfaces de téléphones portables." Thèse, 2010. http://hdl.handle.net/1866/4736.
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L’évolution technologique et l'accroissement de la population vieillissante sont deux tendances majeures de la dernière décennie. Durant cette période, la prolifération ubiquitaire de la téléphonie mobile a changé les habitudes de communication des gens. Le changement constant des appareils téléphoniques portatifs, l'augmentation des fonctions, la diversité iconographique, la variété des interfaces et la complexité de navigation exigent aujourd’hui non seulement plus de temps d'adaptation et d’apprentissage, mais représentent aussi un effort cognitif important.
Les technologies d'information et de communication (TIC) sont devenues des outils incontournables de la vie moderne. Pour les personnes âgées, cet univers en perpétuelle mutation avec ces nouveaux appareils représente un obstacle à l’accès à l’information et contribue ainsi au gap générationnel. Le manque de référence et de soutien et les déficiences physiques ou cognitives, que certaines personnes développent en vieillissant, rendent l'usage de ce type d’objet souvent impossible. Pourtant, les produits intelligents plus accessibles, tant au niveau physique que cognitif sont une réelle nécessité au sein de notre société moderne permettant aux personnes âgées de vivre de manière plus autonome et « connectée ».
Cette recherche a pour but d'exposer les défis d'usage des téléphones portables existants et d'identifier en particulier les problèmes d’usage que les personnes âgées manifestent. L’étude vise la tranche de population qui est peu habituée aux technologies de communications qui ne ciblent le plus souvent que les plus jeunes et les professionnels.
C’est en regardant les habitudes d’usage, que la recherche qualitative nous permettra d’établir un profil des personnes âgées par rapport au TIC et de mieux comprendre les défis liés à la perception, compréhension et l’usage des interfaces de téléphones portables.Technological progress and the growing aging population are two major trends of the last decade. The ubiquitous proliferation of mobile communication devices during this period has significantly altered people’s communication habits. The constantly changing mobile phones, their increasing features, the numerous icon designs, the variety of user interfaces and its complex navigation require nowadays not only more time for adaptation and learning but also a significant cognitive effort. Information technology and communication (ICT) have become essential tools of modern life. For seniors, this constantly mutating universe with its new digital devices makes information accessible to many thus contributing to a generational divide. The lack of reference and support and the physical or cognitive impairment that some people often develop while aging makes the use of such products very difficult. Both, a physically and cognitively accessible system becomes a real necessity in our modern society since it could help seniors live more autonomously and« connected ». This research aims to identify the challenges related to mobile phone use and reveal specific problems that older people encounter. The study focuses on the population that is little familiar with these devices especially since communication technologies seem aimed at the younger generations and professionnels. Through qualitative research seniors’ usage pattern will be studied allowing us not only to establish different user profiles with respect to ICT but also to better understand the challenges related to the perception, comprehension and manipulation of mobile phone user interfaces.
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Leyonhjelm, Scott. "A digital signal processing solution for multichannel base stations." Thesis, 1995. https://vuir.vu.edu.au/15386/.
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Radio communication systems of the future will require a large increase in user capacity. To achieve this, cell sizes will reduce and the number of base stations will increase. Current base station architectures use analogue combining techniques which are expensive, voluminous and inflexible. This thesis investigates a Digital Signal Processing (DSP) solution which produces a cheaper, smaller and more flexible multichannel base station transmitter design. The main design challenges of the new DSP low power
combining architecture are the multichannel combining algorithm, the frequency translation of the multichannel signal to radio frequency, the Digital to Analogue
Conversion (DAC) interface and the wideband ultra-linear power amplifier. This thesis considers the pre-power amplifier stages.
20
Renolds, Victor Alexander. "Touching knowledge: digital media practice and medium theory informing learning on mobile touch screen devices." Thesis, 2017. https://vuir.vu.edu.au/36450/.
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The years since 2007 have seen the worldwide uptake of a new type of mobile computing device with a touch screen interface. While this context presents accessible and low cost opportunities to extend the reach of higher education, there is little understanding of how learning occurs when people interact with these devices in their everyday lives. Medium theory concerns the study of one type of media and its unique effects on people and culture (Meyrowitz, 2001, p. 10). My original contribution to knowledge is to use medium theory to examine the effects of the mobile touch screen device (MTSD) on the learning experiences and practices of adults. My research question is: What are the qualities of the MTSD medium that facilitate learning by practice? The aim of this thesis is to produce new knowledge towards enhancing higher education learning design involving MTSDs. The project involved a class of post-graduates studying communications theory who were asked to complete a written major assessment using their own MTSDs. Their assignment submissions form the qualitative data that was collected and analysed, supplemented with field notes capturing my own post-graduate learning experiences whilst using an MTSD. I predominantly focus on the ideas of Marshall McLuhan within the setting of medium theory as my theoretical framework. The methods I use are derived from McLuhan's Laws of the Media (1975), its phenomenological underpinnings and relevance to the concept of `flow' (Csikszentmihalyi, 2014b, p. 24). The key finding of the study is that the experience of being in control is a central issue for students when they use the MTSD to learn. In pursuing this issue I discover the relevance of paradox to my investigation, which develops as the centrepiece theme and method that I deploy for my further analysis of the MTSD.
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Dépelteau, Isabelle. "L'usage et l'appropriation des communications mobiles textuelles par les acteurs de la réponse humanitaire du séisme du 12 janvier, 2010 en Haïti." Mémoire, 2013. http://www.archipel.uqam.ca/5728/1/M13031.pdf.
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Ce mémoire porte un regard sur la contribution des communications mobiles textuelles, en l'occurrence SMS et Twitter dans une dynamique de crowdsourcing par les acteurs au sein des groupes sectoriels (clusters) des Nations Unies lors de la réponse humanitaire de janvier 2010 en Haïti. L'hypothèse énonce que malgré l'effervescence et la médiatisation des techniques, la contribution des CMT était limitée par l'état des lieux, la dynamique de l'organisme de la réponse, ainsi que par l'appropriation de la technique par les acteurs. La méthodologie de l'étude de cas a été mise à profit du travail de collecte et d'analyse des données. Les résultats corroborent l'hypothèse en mettant en lumière l'écart des usages et appropriation des techniques au sein du groupe des participants en comparaison à la communauté locale, l'influence de la dynamique du développement sur la coopération internationale en temps de réponse, ainsi que le peu d'importance accordée à la communication par l'organisme de la réponse. Les résultats indiquent également que le séisme en Haïti constitue un événement historique marquant un changement de paradigme quant au rôle des CMT et de la communication dans la gestion des désastres futurs.
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MOTS-CLÉS DE L’AUTEUR : SMS, Twitter, désastre, réponse humanitaire, TIC, Haïti
22
Bridges, Paul A. "Digital demodulation techniques for radio channels." Thesis, 1993. https://vuir.vu.edu.au/15572/.
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The basis of this research is directed towards the Private Mobile Radio (PMR) networks, which play significant roles in taxi, police, ambulance and other such services. With an ever increasing need for data transmission, the current PMR systems which were designed for voice are not adequate. This research will examine a digital modulation scheme which can co-exist with an analog system. The generation of the digital modulation will be examined in terms of Adjacent
Channel Interference (ACI) requirements. Simulation techniques for the mobile radio channel are discussed, for evaluation of demodulator performance. Existing demodulation
techniques were reviewed, with several of these simulated to find the most appropriate demodulation scheme for this application. This included the development of a new detection scheme. A test system using Digital Signal Processing (DSP) techniques was constructed.
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Pedro, Macaba Nobre Benedito. "Personalized sensing system." Master's thesis, 2014. http://hdl.handle.net/10437/6166.
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Orientação: Paulo MendesCom o surgimento dos ‘smartphones’, entre os anos de 2007 e 2010, a Indústria Informática, associada principalmente com as comunicações móveis, redobrou esforços em relação aos componentes tecnológicos para os dipositivos móveis. No entanto, as principais empresas de computação como Apple, Microsoft e Google, apresentaram-se divididas quanto a disponibilização para os desenvolvedores externos do seu pacote de desenvolvimento de software, abrindo caminho a que ferramentas externas fossem surgindo. Com a disponibilização do ‘Mono for Android’, ambiente integrado de desenvolvimento para dispositivos Android, pequenos desenvolvedores têm a possibilidade de apresentar suas próprias aplicações, muitas delas permitindo ao utilizador efetuar partilha de conteúdos. Do estudo feito sobre diversos conceitos tecnológicos, desde as redes tolerantes a atrasos, sensores embutidos em dispositivos móveis, abstração de dados, aprendizagem máquina, redes centradas em conteúdo, nasce o Personalized Sensing System (PersonalSense) com o objetivo de demonstrar a possibilidade de partilha de conteúdos multimédia, incluindo texto, imagens e vídeos, tendo por base a análise de dados recolhidos, referentes ao comportamento do utilizador sua localização e atividade no momento da partilha. O presente trabalho pretende demonstrar a possibilidade da implementação de mecanismos de partilha de conteúdos em sistemas ubíquos móveis, com base na classificação de dados recolhidos de middleware de gestão de sensores e na capacidade de comunicação direta e de baixo custo (sem infraestrutura) dos dispositivos moveis.
With the emerging of Smartphone’s, especially in the years between 2007 and 2010, the computing industry, mainly associated with mobile communications, increased efforts towards technological components for the devices mobile were made. However, the major companies such as Apple, Microsoft and Google, presented themselves divided on the provision for external developer package their software development, paving the way for external tools that were emerging. With the release of 'Mono for Android', integrated development environment for Android devices, smaller developers have the opportunity to submit their own applications, many of them allowing the user to make content sharing. The study on various technological concepts, since the delay tolerant networks, sensors embedded in mobile devices, data abstraction, machine learning, content-centric networks, is born Personalized Sensing System (PersonalSense) in order to demonstrate the possibility of sharing multimedia content, including text, images and videos, based on the analysis of data collected for the behavior of the user's location and activity at the time of sharing. This work aims to show and demonstrate the possibility of completion of sharing mechanisms for content on mobile ubiquitous systems, based upon data classification collected from managing middleware sensors and the ability to have direct communication and low cost without infrastructure of mobile devices.
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Kayamba, Mwanja. "Female entrepreneurs' cellular phone habits in Zambia and South Africa." Diss., 2007. http://hdl.handle.net/10500/2313.
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1 online resource (viii, 155 leaves)This study explores the ways in which female entrepreneurs in Zambia and South Africa use their cellular phones, as well as their interests and needs in using this technology. The findings in this study are therefore crucial to the body of knowledge on programmes that seek to uplift women's lives through the deployment of ICTs, since current policies do not make full provision for the use of mobile phones in female entrepreneurship. Information on female entrepreneurs and cellular phones was collected in the literature review. The scrutiny of various literature sources and the analysis of the responses from the interviews with the female entrepreneurs were carried out to arrive at answers to the following research questions: 1. Can telecommunications (specifically, cellular phones) increase the participation of women in the economy? 2. What are the consumer habits of female entrepreneur cellular phone users in Zambia and South Africa? 3. Are the communication needs of business women in Zambia and South Africa adequately met? 4. What are the obstacles that female entrepreneurs in Zambia and South Africa face in the use of cellular phones? 5. What are the similarities and differences in the consumer habits of female entrepreneur cellular phone users in Zambia and South Africa? In order to gather information on the consumer habits of female entrepreneurs in Zambia and South Africa, a survey was conducted of 100 female entrepreneurs. The female entrepreneurs identified in this survey consist of female business owners with no more than 50 employees each, from Gauteng Province in South Africa, and Lusaka Province in Zambia. The female entrepreneurs were identified through the accidental sampling technique, and a structured questionnaire was used to collect information from them. The findings of the investigation reveal that cellular phones have the potential to increase the participation of women in mainstream economic activity, since they are a useful means of communication that allow women from diverse backgrounds to communicate easily for both business and social purposes. Accordingly, national policy-makers in South Africa and Zambia need to investigate further the potential of using cellular phone or similar technology to empower small-scale businesswomen. The investigation also shows that the cellular phone consumer habits of female entrepreneurs in Zambia and South Africa differ when it comes to using cellular phones for business and social communication purposes. More Zambian women indicated that they use their cellular phones in business operations, while South African women showed a tendency to use their phones more for social purposes. The results of this investigation further illustrate that despite the importance in value which the mobile phone has for women entrepreneurs in both Zambia and South Africa, the communication needs of women's entrepreneurship are not adequately met. The main obstacles in meeting the communication needs of female entrepreneurs in Zambia and South Africa are inadequate network coverage and high prices. The study shows that a number of women (52,2%) indicated that they are inhibited from effective communication services and therefore resort to borrowing other people's mobile phones. The lack of empirical studies on the use of telecommunications by female entrepreneurs in both Zambia and South Africa attests to the fact that women's entrepreneurship is still an area that requires in-depth investigation. If various development efforts are to meet their targets, clearly the area of women's entrepreneurship and how various ICTs such as cellular phones are used therein needs urgent investigation.
Communication Sciences
M. A. (International Communication)
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Waiyaki, Edward Chege. "Leveraging technology for business fleet applications : a case study of fleet management system implemented in Kenya Power & Lighting Company Limited." Diss., 2013. http://hdl.handle.net/10500/11883.
Full textAbstract:
This study aimed to evaluate the effectiveness of a modern fleet management system in improving the logistics of transporting staff, goods and materials in Kenya Power & Lighting Company, a utility firm in power distribution. In today’s competitive marketplace which is characterised by rapidly changing business requirements, leveraging leading edge technologies and adopting best practices are essential in order to ensure sound logistical support that guarantees both effectiveness and efficiency in the transportation processes.
The sampling procedure of one-stage, cluster sampling and the use of the simple random sampling technique were used in this study to select a sample size which was sufficiently representative of the whole population. Both the descriptive study approach and the survey research strategy were adopted to enable the collection of data in a manner that allowed in-depth examination while gathering information that explained the relationships between constructs, in particular, cause and effect relationships.
The main purpose of this dissertation was therefore to establish that the use of information technology is feasible in transport industries, explain possible obstacles and also any major advantages of its implementation. Secondly, as regards the theoretical aspect, a broadened view on the use of online tracking for vehicles using a global positioning system is presented, together with practical examples, to illustrate its successful implementation in a fleet management system. The study concludes by offering suggestions and recommendations from the research results and the researcher’s experiences for future studies.Transport Economics, Logistics & Tourism
M. Com. (Transport Economics)
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(8803076), Jordan M. McGraw. "Implementation and Analysis of Co-Located Virtual Reality for Scientific Data Visualization." Thesis, 2020.
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Advancements in virtual reality (VR) technologies have led to overwhelming critique and acclaim in recent years. Academic researchers have already begun to take advantage of these immersive technologies across all manner of settings. Using immersive technologies, educators are able to more easily interpret complex information with students and colleagues. Despite the advantages these technologies bring, some drawbacks still remain. One particular drawback is the difficulty of engaging in immersive environments with others in a shared physical space (i.e., with a shared virtual environment). A common strategy for improving collaborative data exploration has been to use technological substitutions to make distant users feel they are collaborating in the same space. This research, however, is focused on how virtual reality can be used to build upon real-world interactions which take place in the same physical space (i.e., collaborative, co-located, multi-user virtual reality).
In this study we address two primary dimensions of collaborative data visualization and analysis as follows: [1] we detail the implementation of a novel co-located VR hardware and software system, [2] we conduct a formal user experience study of the novel system using the NASA Task Load Index (Hart, 1986) and introduce the Modified User Experience Inventory, a new user study inventory based upon the Unified User Experience Inventory, (Tcha-Tokey, Christmann, Loup-Escande, Richir, 2016) to empirically observe the dependent measures of Workload, Presence, Engagement, Consequence, and Immersion. A total of 77 participants volunteered to join a demonstration of this technology at Purdue University. In groups ranging from two to four, participants shared a co-located virtual environment built to visualize point cloud measurements of exploded supernovae. This study is not experimental but observational. We found there to be moderately high levels of user experience and moderate levels of workload demand in our results. We describe the implementation of the software platform and present user reactions to the technology that was created. These are described in detail within this manuscript.