The focus of this thesis is usability of an everyday used product; the cell phone seen from a Human – Computer Interaction perspective. The purpose with the thesis is to create an understanding of how cell phones are used by persons in natural /public settings and in everyday activities. Further the purpose is to describe users’ experiences of using cell phones. In this study, ethnography was used as method. The theoretical framework is the contextual usability perspective. The cell phone is used in many contexts and in different ways. We can make the conclusion from what the study shows, that the cell phone is outermost used and need for social issues. From a subjectivity perspective on usability, we can see that the cell phone is a product which needs and goals are highly subjective to the user. From a flexibility perspective on usability, we see that the cell phone is used in different contexts and therefore must be flexible in use. From a subjectivity perspective on usability, we see that it is a product that exists and is used in a social environment. A design suggestion that correspond to these aspects is the module cell phone. We can also make the conclusion that goals, needs and use are inseparable and constitute prerequisites for each other.

This Master´s Thesis is designed for services of the carriers on contractual personel transportation and taxi service especially in the Prague. Within the framework of this thesis legislative condition for personal transportation are examined. Thesis is describing the biggest carriers in personal transportation and taxi service. In the end the cell phone aplications, which deal with personal transportation are described.

Distracted driving is a dangerous activity that continues to claim lives on roadways throughout the United States. A goal of this research was to collect distracted driving behavior data through observation in the field. A methodological approach was devised to keep data collection consistent across the observation periods. Analysis of the data provided information regarding trends in distraction type or driving behavior while engaging in a secondary activity. In combination with the observational portion of this research, another key component to understanding distracted driving was the crash report narrative key word search. By searching through the crash reports, it was determined which key words have high discriminating powers that indicate distraction was a key component to a crash. Additionally, the key word search demonstrated how accurately distraction related crashes are reported via the crash report form. This research contributed to the existing literature regarding distracted driving and also expanded the methods of research that are currently in use.

This thesis deals with voice encryption in wireless communication. First, the necessary theoretical base about mobile telephone network is presented and followed by a description and comparison of existing voice encryption methods in wireless communication. After that, modern cryptographic algorithms are briefly described and a method based on voice over Internet protocol is proposed. This method is implemented as an Android application.

Technological development, broad availability and ubiquity of mobile phones made it possible in recent years to start a progression leading to the integration of mobile phones into biomedical analytical methods, the development of telemedicine and mobile personal health applications. This paper deals with the literature review of the mobile phone usage in biomedicine, with emphasis on the methods of optical analysis and technical solutions using 3D printing technology. It provides a draft and practical implementation of salivary cortiol level measuring system using a mobile phone, ELISA analytical methods, 3D printing technology and a set of custom Matlab functions connected with Matlab Mobile application and Mathworks Cloud. Also provides critical evaluation of results and method possibilities, and presents set of proposals and findings for quality of measurment optimization.

Technological development, broad availability and ubiquity of mobile phones made it possible in recent years to start a progression leading to the integration of mobile phones into biomedical analytical methods, the development of telemedicine and mobile personal health applications. This paper deals with the literature review of the mobile phone usage in biomedicine, with emphasis on the methods of optical analysis and technical solutions using 3D printing technology. It provides a draft and practical implementation of salivary cortiol level measuring system using a mobile phone, ELISA analytical methods, 3D printing technology and a set of custom Matlab functions connected with Matlab Mobile application and Mathworks Cloud. Also provides critical evaluation of results and method possibilities, and presents set of proposals and findings for quality of measurment optimization.

This study sought to investigate the relationship between cell phone conversation type and dangerous driving behaviors. It was hypothesized that more emotional phone conversations engaged in while driving would produce greater frequencies of dangerous driving behaviors in a simulated environment than more mundane conversation or no phone conversation at all. Participants were semi-randomly assigned to one of three conditions: (1) no call, (2) mundane call, and, (3) emotional call. While driving in a simulated environment, participants in the experimental groups received a phone call from a research confederate who either engaged them in innocuous conversation (mundane call) or arguing the opposite position of a deeply held belief of the participant (emotional call). Participants in the no call and mundane call groups differed significantly only on percent time spent speeding and center line crossings, though the mundane call group consistently engaged in more of all dangerous driving behaviors than did the no call participants. Participants in the emotional call group engaged in significantly more dangerous driving behaviors than participants in both the no call and mundane call groups, with the exception of traffic light infractions, where there were no significant group differences. Though there is need for replication, the authors concluded that whereas talking on a cell phone while driving is risky to begin with, having emotionally intense conversations is considerably more dangerous.

This mini-dissertation aims to explore the daily realities faced by caregivers of children with autism spectrum disorder and the implications thereof on the use of a cell phone application that can assist in easing the tension between the need for support and the lack of resources to secure that support whenever necessary. Bronfenbrenner’s bio-ecological systems theory, in addition to the assets-based approach, forms the basis on which the study is conceptualised. Using a qualitative approach, a case study research design was used to select the participant by means of purposive sampling. The research participant used the application that was selected for a period of ten days, after which a semi-structured interview was conducted as the primary mode of data collection. The data were then analysed, using inductive thematic analysis, after which themes and subthemes were derived. The findings of the study indicated that the research participant faces a meaningful lack of financial support and social support, and that the cell phone application was seen as a useful tool for supporting her child in spite of this. The study contributed to expanding the current research body on this topic. A major limitation was the sample size of the study being too small for the results to be generalised. Recommendations include that cell phone applications be designed with users’ cultural and language preferences in mind and that more studies of this nature be done. / Dissertation (MEd)--University of Pretoria, 2019. / Educational Psychology / MEd / Unrestricted

This study examined the relationship between adolescents' use of texting and their level of identity development, cognitive autonomy, and self-esteem. One hundred and nineteen Utah State University students participated in this study by filling out a questionnaire that included a section designed specifically to learn the texting habits of the participants, and also included sections derived from previously existing measures on identity, autonomy, and self-esteem. The results show statistical significance of age and texting. Participants who were 23 years+ sent significantly less than those participants who were 19-22 years. Areas of gender, identity, and self-esteem were also analyzed. Implications of these findings for future research were also discussed.

This research study investigated how a Dominican English language teacher and her students appropriated cell phone features for educational purposes inside and outside the classroom. The dissertation used a qualitative approach that focused on the teacher, and four students selected from a class of 23. Data collection took place for 8 weeks in an English language center located at a public university in the Dominican Republic in the summer of 2014. I collected data through interviews, conversations, classroom observations, and questionnaires. Data were analyzed to identify emerging themes that described how the teacher and students used their cell phones for different educational activities related to English language learning. Findings identified four major themes on how the teacher used different cell phone features for educational purposes: cell phone as connectivity tool, content delivery tool, research and reference tool, and assessment facilitation tool. Findings from the four student subcases indicated that they appropriated features in their cell phones in different ways, including: iPod as a cell phone (student 1), assessment and feedback facilitation tool (student 2), peer- and self-assessment facilitation tool and e-reader (student 3), and multimedia delivery and social interactivity tool (student 4). Themes across subcases and from the classroom in general indicated that participants used features that allowed them to use their cell phones as tools for data gathering and note taking, reference and research, collaboration, and repository. Findings from this dissertation shed light on how a teacher and students can make use of their own mobile technologies to support English language learning in a Dominican classroom with uneven access to technology.