Current advances in mobile technology have enabled the formation of mobile technology enriched learning environments. This study documents a specific experimental research project in which secondary school learners used mobile cellular phones as a form of mobile technology to create, support and enhance a learning event in physical science studies. Although students used their own mobile phones for the duration of the research, they could connect to the MobilED platform used in this study to access information that they had previously created online. Mobile phones therefore served to extend the physical boundaries of the classroom by creating an ubiquitous and personal learning experience for each student. The experimental learning event was central to the design of the research. The iterative component of the design made it possible for the facilitator to operate as a “reflective practitioner” (Reeves, 2005) who could manipulate the components of the lesson in a quest for optimal success. The data and conclusions of the study confirm that that the texting function of mobile phones may be effective in furthering communication, cooperative learning and access to content. / Dissertation (MEd)--University of Pretoria, 2007. / Curriculum Studies / unrestricted

Background: Refugees find it difficult to integrate and assimilate in their host country because of a myriad of challenges. Mobile phones have become one of the main tools for promoting their wellbeing and supporting the integration of refugee communities on the margins of society. Mobile phones can contribute towards reducing isolation and loneliness, and assist in improving interpersonal relations and fostering processes of assimilation. The purpose of the research: The main objective of this study was to examine how the use of mobile phones by refugees in South Africa contributes to their social connectedness. To this end, the study discusses the role of mobile phones in the process of acculturation, in creating a sense of belonging, and in maintaining relationships. Design/methodology/approach: This research employed a qualitative method and an interpretivist epistemological perspective. A conceptual framework was developed on the basis of a literature review. Data was collected from semi-structured interviews and WhatsApp group chats, and analysed using thematic analysis. The interviewees comprised 27 refugees living in South Africa, and the WhatsApp group had 15 members. Findings: The findings demonstrate that the refugees face a multitude of obstacles, including language and culture barriers, the challenge of obtaining legal status, physical separation from their friends and family, and feelings of being judged, insecure, and excluded. Mobile phone usage offers refugees several benefits, especially through their affordances that include accessing information, pursuing economic and institutional opportunities, enabling communication, and developing linguistic and cultural knowledge of the host country. At the same time, mobile phones enable refugees to maintain connection with their country of origin. Refugees nevertheless considered it difficult to develop a sense of belonging through their use of mobile phones. Research contribution: This study adds to perspectives on utilising mobile phones to achieve social connectedness for two categories of refugees: newcomers and old-timers. The study contributes to theory by proposing a framework for understanding and analysing the relationship between social connectedness and mobile phones. The study contributes to knowledge through the investigative approach of using WhatsApp group chat to collect data. The findings can contribute to enabling non-profit organisations and UNHCR to develop strategies and processes for providing interventions for refugees.

While there has been a strong history of using personal electronic devices in education, more recent endeavors have worked to establish the place of contemporary mobile devices (smartphones and tablets) in post-secondary education. However, these devices do not seem fully realized and leveraged as a useful tool in many curricula, particularly in the field of composition. This work seeks to explore the potential for integrating mobile technologies in writing courses and writing centers in ways that value contemporary composition pedagogy and in ways people actually use smartphones. Such an approach consists primarily of unpacking the usage patterns, user experiences, and attendant attitudes of those who would be primary users of this technology, thereby better understanding how to more effectively craft meaningful, mobile learning applications for composition students. Towards those ends, a mobile web application was developed and tested in two scenes: first-year composition classrooms and an intensive summer bridge program for incoming freshmen.

The current study extended earlier findings about the RealVictory program by using a larger sample and by examining Victory Seeker phone use in more detail. Using a sample of 144 juveniles, it was found that as the number of calls answered increased, the likelihood of a rearrest and the number of rearrests decreased slightly but the differences were not statistically significant. However, as the number of calls increased, the likelihood of a felony rearrest decreased significantly and the total number of felony arrests decreased significantly. These findings suggest that Victory Seeker may be a useful tool to reinforce and provide follow-up after treatment.

Mobile phones are transforming many aspects of rural areas in the developing world. Much of the early research on phones and related information and communication technologies (ICTs) in developing countries has focused on social networking and economic benefits in primarily urban or agricultural settings. Few studies, however, have examined the implications of mobile technologies on pastoralist livelihoods and biodiversity conservation. To build on this opportunity, this study examines the impact of mobile phone technology on four Maasai communities near Tarangire National Park in northern Tanzania. I asked the questions: (1) How do phones affect human-wildlife interactions?; and (2) What are the effects of mobile phone use on measures of human-wildlife conflict (HWC)? This research uses a mixed methods approach to address these two questions and test the hypothesis that mobile phone use reduces HWC. Qualitative group interviews revealed that households use phones to manage wildlife interactions in every aspect of their lives - especially when the interactions relate to pastoralism and crop-based agriculture. Maasai use mobile phones as tools of information distribution to mitigate and reduce the severity of effects of HWC. Multivariate analyses of survey measures of phone use and exposure to conflict (i.e., crop and livestock predation and human attacks) offer mixed evidence that mobile phone use is correlated with a perception of less recent HWC events. These findings provide an indication that the expansion of mobile digital technologies may be able to support livelihoods and biodiversity simultaneously. / Master of Science

With the wide spread of mobile phones, PDAs, and Smartphones, M-Commerce has become a major application domain for mobile devices, unlike conventional wired networks, mobile devices allow the user to conduct online transactions regardless of the time and the place as long as there is mobile network coverage. However, online transactions require adequate level of security to insure the confidentiality, the integrity, and the availability of the user’s information. Security measures consume a considerable amount of energy and require more time in processing. The aim of this thesis is to optimise the energy and the resources consumption of mobile phones when applying variant symmetric and asymmetric schemes. This aim can be achieved through developing A System State Security Management Framework, SSSM, which will implement encryption schemes, symmetric and asymmetric, and will provide different options to enable the user to choose the type of encryption, the key size, and number of rounds of computation to optimise the energy consumption level of the mobile phone. This thesis compares the power and the resources consumed by the most commonly used encryption algorithms such as CAST, IDEA, Triple-DES, RSA, and AlGamal. This comparison helps to draw the advantages and disadvantages of each algorithm scheme used in reference to the security level it provides and the power it consumes. Implementing this mechanism will enhance the performance of mobile phones by increasing the security levelsprovided by the encryption schemes and utilising the limited power and resources efficiency. Therefore, confidentiality will be presented in mobile phones and variant encryption schemes, symmetric and asymmetric, and changeable key sizes and rounds, will ensure the authenticity of both senders and recipients depending on their needs as well as resources available. This research makes contributions in two major areas; the first area consists of the novel Energy Aware Encryption polices generated by this work, the second area of contribution is the energy measurements and experimental results which validate the approach presented in the research.

<p>The older population is increasing, as is life expectancy. Technical devices are becoming more widespread and used for many everyday tasks. Knowledge about new technology is important to remain as an active and independent part of the society. However, if an old user group should have equal access to this technology, new demands will be placed on the design of interfaces and devices. With respect to old users it is and will be important to develop technical devices and interfaces that take the age-related decline in physical and cognitive abilities into account. The aim of this work was to investigate to what extent the age-related cognitive decline affects performance on different computer-related tasks and the use of different interfaces. With respect to the use of computer interfaces, two studies were conducted. In the first study, the information was presented with a hierarchical structure. In the second study the information was presented as a 3D-environment, and it was also investigated how an overview map could support navigation. The third study examined the age-related cognitive decline in the use of a small mobile phone display with a hierarchical information structure. The results from the studies showed that the most pronounced age-related difference was found in the use of the 3D-environment. Within this environment, prior experience was found to have the largest impact on performance. Regarding the hierarchical information structures, prior experience seemed to have a larger impact on performance of easy tasks, while age and cognitive abilities had a larger impact on performance of more complex tasks. With respect to navigation aids, the overview map in the 3D-environment did not reduce the age-differences; however, it contributed to a better perceived orientation and reduced the feeling of being lost.</p>

<p>Acoustic echo cancelation (AEC) composes a fundamental property of speech processing to enable a pleasant telecommunication conversation. Without this property of the telephone the communicator would hear an annoying echo of his own voice along with the speech from the other communicator. This would make a conversation through any telecommunication device an unpleasant experience.</p><p>AEC has been subject of interest since 1950s in the telecom industry and very efficient solutions were devised to cancel linear echo. With the advent of low cost hands free communication devices the issue of non linear echo became prominent because these devices use cheap loudspeakers that produce artifacts in addition to the desired sound which will cause non linear echo that cannot be cancelled by linear echo cancellers.</p><p>In this thesis a Harmonic Distortion Residual Echo Cancelation algorithm has been chosen for further investigations (HDRES). HDRES has many of those features that are desirable for an algorithm which is dealing with nonlinear acoustic echo cancelation, such as low computational complexity and fast convergence. The algorithm was first implemented in Matlab where it was tested and modified. The final result of the modified algorithm was then implemented in C and integrated with a complete AEC system. Before the implementation a number of measurements were done to distinguish the nonlinearities that were cause by the mobile phone loudspeaker. The measurements were performed on three different mobile pones which were documented to have problems with nonlinear acoustic echo.</p><p>The result of this thesis has shown that it might be possible to use an adaptive filter, which has both low complexity and fast convergence, in an operating AEC system. However, the request for such a system to work would be that a doubletalk detector is implemented along with the adaptive algorithm. That way the doubletalk situation could be found and the adaptation of the algorithm could be stopped. Thus, the major part of the speech would be saved.</p>

In the last decade, there has been an exponential rise in mobile phones in both developed and developed countries. In light of that, this paper investigates whether the expansion of such mobile networks leads to increased entrepreneurial activity. By conducting panel regressions, I find the degree to which various stages of entrepreneurial activity is affected by increased mobile phone subscription rates. I use data from 80 countries from 2007 to 2015 and parse out the different effects between developing and developed countries, and between males and females. I find that larger mobile networks encourage entrepreneurship, particularly in the early stages, with a larger benefit experienced by developed countries compared to developing countries. In addition, more females than males engage in early-stage entrepreneurship due to increased mobile phone subscription rates in developing countries. However, an opposite trend is observed in developed countries. Finally, I also consider potential implications on economic development as a result of such increased business formation.

Smartphones are innovations that currently provide immense benefits and convenience to users in society. However, not all the users of society are accepting and using smart phones, more specifically, for this research study older adults (50+) are a demographic group displaying such an attitude. Currently, there is minimal knowledge of the reasons that older adults adopt and use smartphones. Bearing this in mind, this research study aimed to identify, examine and explain the adoption and usage of smartphones in the UK within the 50 years old and above population. For this purpose, a conceptual framework, a Model of Smartphone Adoption (MOSA) was formed drawing factors from the theories of Unified theory of Acceptance and Use of Technology (UTAUT), the Diffusion of Innovations theory (DoI) and Technology Acceptance Model 3 (TAM3). Seven variables from the theories were brought to consideration, which were Observability, Social influence, Compatibility, Effort expectancy, Facilitation conditions, Performance expectancy and Perceived enjoyment. For the research method, a quantitative approach was selected to examine and apply MOSA that involved the data collection method of an online questionnaire survey that resulted in 204 completed replies during the pilot phase of this research and 984 in the final phase. The collected data was analysed using SEM-PLS where the results found that six of the eight formed hypotheses were supported, and the factors of Compatibility, Effort expectancy, Facilitation condition, Performance expectancy and Perceived enjoyment were important for the adoption of smartphones. From these results, it was understood that older adults used smartphones because they have enough knowledge, time and money to use. They also think that smartphones are easy to use, provide benefits including enjoyment and are compatible with their lifestyles. In terms of usage, older adults frequently used the basic features of smartphones such as making a phone call, SMS, email, and browsing. Older adults are also likely to use their devices for seeking information about their health and for appointments with their doctors; however, from this research it was found that more than half of the 50 years old and above adults did not use smartphones for health and well-being purposes. The contributions of this research are viewed to be the identification and understanding of the factors that encourage or inhibit smartphones use within the older adult population. Secondly, this research can inform smartphone manufacturers and developers of factors pertinent for the design of computing devices and applications specific to silver surfers. Finally, this research can enlighten policy makers when forming decisions that encourage the adoption and use of smartphones within the older adult population. Regarding limitations, these existed in the form of finance and time. To overcome the limitations, this research recommends further studies that apply qualitative research and/or to provide a comparison between western and eastern countries.