Communication has been identified as a critical component in the outcome of emergency response. Post-mortems of “what went wrong” in disaster responses often point toward breakdown in communication between first responders, those directing rescue efforts, and the general population as one of the primary impediments to rendering timely aid and communicating adequate safety and weather information. Due to the high resilience, relatively low costs, and advanced features of modern hand-held communication devices, these devices are in a position to drastically improve communication flow during emergency management situations. Due to the lack of official implementation of these devices and the lack of the establishment of standard guidelines for device selection, the use of hand-held communication devices in emergency management is yet to be optimized. Island nations such as the Bahamas, which face unique challenges in regard to emergency management due to geographical, infrastructural, political, and cultural hurdles which are found in the region, can especially benefit from the optimized implementation of hand-held communication devices in emergency management. This study examined current emergency response procedures in The Bahamas, created a baseline for the current use of hand-held communication devices by Bahamian emergency management officials and civilians, identified the communication needs of Bahamian emergency management officials and civilians, and proposed a model for the selection of handheld communication devices based upon human factors principals and focusing on user priorities. This study began with a focus group interview which included 14 Bahamian emergency management officials in order to gain an understanding of current Bahamian emergency response iv procedures and the communication challenges faced by emergency management officials during high consequence emergencies. A paper based survey was conducted, in which 31 Bahamian emergency management officials answered demographic, skill level, and functionality questions related to the use of hand-held communication devices to support emergency related activities including those directed toward preparation, mitigation, and response. These emergency management officials provided invaluable input based upon their practical experience in high consequence emergency situations. 155 Bahamian civilians participated in a similar survey which was a reduced version of the survey used for emergency management officials. Both surveys included questions in regard to the background information of the participants, previous handheld communication experience, device performance, and what other communication devices were being utilized. The surveys were analyzed using statistical methods of categorical data analysis and correlations were identified. Several communication needs which were categorized as infrastructure, organizational, and equipment needs as well as a hierarchy of device selection factors in regard to the use of hand-held communication devices during emergency management situations were identified. The analytic hierarchy process (AHP) was used in order to determine the priorities of each of the identified device selection factors and a model for the selection of hand-held communication devices used to support communication flow in high consequence emergency management was proposed.

In this exploration of the human battery interface, the way in which battery information and notifications effect interaction are analyzed through two small scale studies and a design proposal which is then user tested. With the first study, an attempt is made to gauge user’s feelings toward the current battery information display on their smartphones through a brief online questionnaire. Participants who were selected for further study installed battery monitoring software on their devices and shared the resulting data. This data was then analyzed and some usage patterns were extrapolated. After surveying current market solutions and research in the field, design opportunities were explored and a final design proposal was created and tested with possibilities for further applications being discussed.

No description available.

This thesis is framed within the research area of Information and Communication Technologies for Development (ICT4D), which is concerned with how ICT can make a difference to the lives of the poor. This study focuses primarily on mobile phones and how they can be used as part of an Agriculture Market Information Service (AMIS) in order to provide crucial information to farmers in Bangladesh. AMIS principally collect, manage and disseminate agricultural market prices and related information through various processes and media. These services are mainly used by farmers. The research question of how mobile phone-based AMIS can be designed and deployed in order to improve opportunities for farmers in Bangladesh is investigated through a design science research approach in four steps; understanding the scope and challenges related to AMIS in least developed countries; diagnosing the situational realities of farmers of Bangladesh; understanding the process of adopting mobile phones and investigating market information practices and preferences in a rural context; and finally designing and implementing a mobile phone based AMIS and evaluating the efficiency and effectiveness of it for the farmers of Bangladesh. In this thesis, development is viewed in terms of bringing about an in-crease in farmers’ capability set directed towards the utilization of resources for the purpose of production and trade. Information and knowledge are important drivers of development and poverty reduction: ICT can create new opportunities to expand the availability, exchange, and impact of information and knowledge. This thesis contributes to ICT4D research and practice through empirical findings, the design of an AMIS, test results, and the development of analytical tools. Its major contributions include an increased understanding of farmers’ attitudes and preferences towards the use of technology in general, and mobile phones in particular, and a broader understanding of ICT for human development in the context of poor rural regions. / Informatics or ICT4D

Thesis (MA)--Stellenbosch University, 2013. / ENGLISH ABSTRACT: The constant growth in information and communications technology (ICT) broadens the capabilities of researchers to understand and interpret the social world. New multidisciplinary methods of measuring social realities are constantly being developed and improved. This methodological study aims to incorporate novel methods of automated, computerised content- and sentiment analysis software in order to produce a usable instrument for measuring public expressions on democracy from the social network site, Twitter. Adapting methods developed by O‟Connor et al. (2010) and using an online platform called Chatterbox Analytics Ltd., this study attempts to complement traditional survey research data on democracy. The creation of this method allows researchers to automatically and without deep programming knowledge, extract and analyse opinionated data from a substantial segment of the population, namely Twitter users. This is the first study, as far as this researcher is aware, that develops automated instruments for the measurement of expressions on democracy from online social networks. The rationale for the development of this instrument lies in the apparent recent rise in negative sentiment on democracy in academic spheres and political realities alike. Throughout history support for democracy has swayed, which in turn placed democracy on a rocky path of development. As negative opinions on democracy became overwhelming this system of governance was forced to adapt by changing its core structure. This could be the case again today. Authors such as Crozier, Huntington and Watunaki (1975) have already warned of a crisis of democracy in the 1970s. More recently authors such as Dalton (2004) and van Beek (2012) expressed opinions indicating that globally citizens are steadily becoming more critical of political parties, politicians, political policies and the whole democratic process. These negative sentiments might be indicative of what van Beek (2012:12) calls “an erosion in support for democracy”. Traditional survey projects examining opinions on democracy, such as the World Values Survey, offer insights into global expressions on democracy, but are time consuming, costly and complicated to conduct. The method developed in this study allows researchers to complement traditional survey data with insights that are automatically gathered and analysed from the influential social media network, Twitter. This introductory study finds that automated analysis of expressions on democracy from Twitter is indeed feasible. In order to express the extent to which the developed method is feasible, this study offers an example case, examining expressions on democracy from Twitter for the period of 1 May to 31 July 2012. Furthermore the study offers a quantitative manual evaluation of the accuracy of the developed measurement instrument. With the present level of content- and sentiment analysis technology this study finds that the accuracy of the results from this method, though informative, is still limited. The study therefore concludes with an advisory section highlighting methods for future studies to improve on the accuracy of this measurement instrument. / AFRIKAANSE OPSOMMING: Deur die konstante groei in inligting- en kommunikasietegnologie (IKT) word die veld waaruit navorsers kan put om die sosiale wêreld te verstaan en te interpreteer al groter. Nuwe multidissiplinêre metingsmetodes om die sosiale werklikheid te verstaan, word konstant ontwikkel en verbeter. Hierdie metodologiese studie beoog om nuwe metodes van geoutomatiseerde, gerekenaariseerde, inhouds- en sentimentanalisesagteware saam te voeg om 'n bruikbare instrument vir die meting van publieke uitsprake oor demokrasie, op die sosiale netwerk Twitter te skep. Metodes wat deur O'Connor et al. (2010) en die aanlyn platform, Chatterbox Analytics Ltd ontwikkel is, is aangepas om 'n instrument te skep wat gebruik kan word om by te dra tot tradisionele opname-navorsingsdata oor demokrasie. Hierdie nuwe metode sal navorsers toelaat om outomaties en sonder veel programmeringsvaardighede opiniegelaaide data van 'n beduidende segment van die samelewing, naamlik Twitter gebruikers, te verkry en te analiseer. Hierdie is die eerste studie, sover hierdie navorser bewus is, wat geoutomatiseerde instrumente ontwikkel vir die meting van uitsprake oor demokrasie op sosiale netwerke. Die beweegrede vir die ontwikkeling van hierdie instrument vloei uit die oënskynlike onlangse styging in negatiewe sentiment oor demokrasie in sowel akademiese- as politieke sirkels. Die ondersteuning vir demokrasie het dwarsdeur die geskiedenis sy hoogte en laagtepunte gehad en hierdie onsekerheid het die ontwikkelingspad van demokrasie taamlik met dorings besaai. Die hele kernstruktuur van híérdie regeringsisteem was geforseer om hewig aan te pas elke keer wanneer die negatiewe opinies oor demokrasie oorweldigend geraak het. Dit wil voorkom asof demokrasie weer op die rand van verandering is. Skrywers soos Crozier, Huntington en Watunaki (1975) het alreeds in die 1970's gewaarsku teen 'n krisis rondom demokrasie. Meer onlangs het skrywers soos Dalton (2004) en van Beek (2012) opinies gelug dat burgers reg oor die wêreld stadig maar seker besig is om meer krities op politieke partye, politici en oor politieke beleide en die demokratiese proses in geheel raak. Hierdie negatiewe sentimente mag dalk 'n aanduiding wees van “'n erosie in die ondersteuning van demokrasie,”, soos Van Beek (2012:12) dit noem. Tradisionele opname-navorsingsprojekte wat na opinies oor demokrasie kyk, soos die „World Values Survey‟, bied wel 'n blik op globale uitsprake oor demokrasie, maar is duur, tydsaam en moeilik om deur te voer. Die metode wat in hierdie studie ontwikkel is, kan bykomende insigte tot tradisionele opname-navorsingsprojekte bring. Díé insigte word outomaties ingesamel en geanaliseer vanuit die invloedryke sosiale netwerk, Twitter. Hierdie inleidende studie bevind dat geoutomatiseerde analise van uitsprake oor demokrasie op Twittter inderdaad moontlik is. Ten einde die mate van sukses van hierdie metode wat ontwikkel is te illustreer, analiseer hierdie studie 'n datagreep van uitsprake oor demokrasie uit Twitter oor die tydperk 1 Mei tot 31 Julie 2012. Hierbenewens bied die studie ook 'n kwantitatiewe waardasie per hand wat die akkuraatheid van die ontwikkelde meetingsinstrument toets. Met die huidige ontwikkelingsvlak van inhouds- en sentiment-analisetegnologie vind hierdie studie dat die akkuraatheid van hierdie metode, alhoewel informatief is, tog beperk is. Die studie sluit af met 'n afdeling wat advies oor hoe verdere studies die akkuraatheid van hierdie meetinstrument kan verbeter, toelig.

The objectives of this work were to investigate, design and implement Multiple-Input Multiple-Output (MIMO) antenna arrays for mobile phones. Several MIMO antennas were developed and tested over various wireless-communication frequency bands. The radiation performance and channel capacity of these antennas were computed and measured: the results are discussed in the context of the frequency bands of interest. A comprehensive study of MIMO antenna configurations such as 2 × 1, 3 × 1, 2 × 2 and 3 × 3, using polarisation diversity as proposed for future mobile handsets, is presented. The channel capacity is investigated and discussed, as applying to Rayleigh fading channels with different power spectrum distributions with respect to azimuth and zenith angles. The channel capacity of 2 × 2 and 3 × 3 MIMO systems using spatial polarisation diversity is presented for different antenna designs. The presented results show that the maximum channel capacity for an antenna contained within a small volume can be reached with careful selection of the orthogonal spatial fields. The results are also compared against planar array MIMO antenna systems, in which the antenna size considered was much larger. A 50% antenna size reduction method is explored by applying magnetic wall concept on the symmetry reference of the antenna structure. Using this method, a triple dual-band inverted-F antenna system is presented and considered for MIMO application. Means of achieving minimum coupling between the three antennas are investigated over the 2.45 GHz and 5.2 GHz bands. A new 2 2 MIMO dual-band balanced antenna handset, intended to minimise the coupling with the handset and human body was proposed, developed and tested. The antenna coupling with the handset and human hand is reported in terms the radiation performance and the available channel capacity. In addition, a dual-polarisation dipole antenna is proposed, intended for use as one of three collocated orthogonal antennas in a polarisation-diversity MIMO communication system. The antenna actually consists of two overlaid electric and magnetic dipoles, such that their radiation patterns are nominally identical but they are cross-polarised and hence only interact minimally.

published_or_final_version / Business Administration / Master / Master of Business Administration

This dissertation examines emerging cultural attitudes, language ideologies, and discursive practices among Navajos and Navajo speakers through the lens of new media technologies on the Navajo Nation. New media such as cell phones and the Internet are significant features of contemporary Navajo communities, and act as both a context for and medium of linguistic and cultural vitality and transformation. They have opened new spaces for Navajo language use, generated emergent uses of the Navajo language, and increased the spaces of language contact and change. This dissertation explores the ways in which ideologies of language and technology have shifted and converged, and describes multiple instances of the transformative nature of technology through the mediation of communities. New technologies do not exist in a vacuum, and novel practices emerge from a wide range of existing observable styles, registers, and norms in Navajo communities. Significant are the shifting geographies of communication, expansion of social networks, and increased circulation of bilingual Navajo hane’, or publicly shared “tellings” in the form of stories, jokes, and information that accompany them. This work analyzes the appearance of new media technologies in contemporary Navajo society within broader discourses of modernity and narratives of progress about, and among, Navajo communities. New technology is not incommensurate with existing practice; rather, emergent practices are part of the broader circulation of Navajo identities, defined here as a process linked to social activities, and emergent practices index the ways in which some Navajos are “doing” community in unexpected ways and unexpected places. New expressive forms and genres have appeared, including a migration to English emails by previously monolingual, illiterate elders, the transition of traditionally oral genres to widely circulated emails, and the appearance of locally created bilingual hip-hop music. These are crucial developments that have immediate implications for Navajo language vitality and cultural continuity. / text

<p>Syftet med uppsatsen är att undersöka hur människor upplever att ständigt vara tillgänglig med sin mobiltelefon och/eller Internet. En kvalitativ metod med semistrukturerade intervjuer har använts, där tolv personer, sex gymnasieungdomar och sex vuxna personer, har intervjuats. Hälften av de intervjuade bor i södra Sverige, hälften i norra. För analysen har McQuails grupperingar inom Uses and gratifications-teorin använts, liksom cultural studies teorier. Resultatet visar att de intervjuade ser det både som en möjlighet och ett krav att vara tillgängliga och uppkopplade, att Internet och mobiltelefon verkar bidra till att arbete/skola och fritid flyter ihop samt att de äldre intervjuade i något högre grad än de yngre upplever negativa aspekter av att vara ständigt tillgänglig. Vi har inte kunnat urskilja några skillnader mellan de intervjupersoner som bor i södra Sverige och de som bor i norra. När vi med utgångspunkt från McQuails kategorier inom Uses and gratifications-teorin har grupperat de belöningar som de intervjuade kan tänkas uppnå, har vi funnit exempel på belöningar inom samtliga kategorier; avkoppling, personlig identitet, personliga relationer och bevakning.</p> / <p>The purpose of this essay is to examine how people experience always being available on their mobile phone and/or Internet. A qualitative method of semi structured interviews has been used, where twelve respondents, six students in upper secondary school and six adults, have been interviewed. Half of the respondents live in southern Sweden, half in northern. The clusters that McQuail developed within the uses and gratifications theory, as well as cultural studies theories, have been used for analyzing our findings. The results show that the respondents see it both as a possibility and a demand to always be available and online, that Internet and/or mobile phones seem to contribute to the merging of work/school  and leisure time, and that the adult respondents to a greater degree than the younger respondents experience negative effects of always being available. We have not been able to distinguish any differences between respondents living in southern Sweden and those living in the north. When grouping our respondents’ obtained gratifications according to McQuails clusters within the uses and gratifications theory, we have found examples in all the categories; entertainment, personal identity, integration and social interaction, and information.</p>

Mobile technologies are emerging as one way to help address health challenges in many countries, including in Least Developed Countries. Mobile technology can reach a large share of the population but in order to provide effective support to healthcare services, technology, information collection and dissemination, and work processes need to be well aligned. The thesis uses a design science methodological approach and mixes qualitative and quantitative data analysis to address the question of, How can mobile technologies be effectively integrated with routine healthcare services? The study concerns the design, implementation, and evaluation of a mobile technology-based system, called SMSaúde, with the aim of improving the care of patients with HIV/AIDS and tuberculosis in Mozambique. The work started with the elicitation of functional and user requirements, based on focus group discussions. An important challenge, as in many mHealth interventions, was the integration with routine healthcare services and the existing IT systems, as well as developing a scalable technical structure. The system has now been in routine use since 2013 in more than 16 healthcare clinics in Mozambique. Evaluation was done by a randomised controlled study. Analysis of patient records showed that retention in care in urban areas was significantly higher in the intervention group than in the control group. In a user study both patients and health professionals were very positive to the system. The thesis contributes to research by demonstrating how information system artefacts can be constructed and successfully implemented in resource-constrained settings. The practical contributions include the designed artefact itself as well as improved healthcare practices and mHealth policy recommendations.