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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
151

Biometric methods and mobile access control

Fransson, Linda, Jeansson, Therese January 2004 (has links)
Our purpose with this thesis was to find biometric methods that can be used in access control of mobile access. The access control has two parts. Firstly, to validate the identity of the caller and, secondly, to ensure the validated user is not changed during the session that follows. Any solution to the access control problem is not available today, which means that anyone can get access to the mobile phone and the Internet. Therefore we have researched after a solution that can solve this problem but also on how to secure that no one else can take over an already validated session. We began to search for biometric methods that are available today to find them that would be best suited together with a mobile phone. After we had read information about them we did choose three methods for further investigation. These methods were Fingerprint Recognition, Iris Scan and Speaker Verification. Iris Scan is the method that is best suited to solve the authentication problem. The reasons for this are many. One of them is the uniqueness and stability of the iris, not even identical twins or the pair of the same individual has the same iris minutiae. The iris is also very protected behind eyelids, cornea and the aqueous humor and therefore difficult to damage. When it comes to the method itself, is it one of the most secure methods available today. One of the reasons for this is that the equal error rate is better than one in a million. However, this rate can be even better. It all depends on the Hamming Distance, which is a value that show how different the saved and temporarily template are, and what it is set to. To solve our session authentication, which was to make sure that no one else could take over a connected mobile phone, a sensor plate is the answer. This sensor will be able to sense for touch, heat and pulse. These three sensor measurements will together secure a validated session since the mobile phone will disconnect if the sensor looses its sensor data. There are, however, technological and other challenges to be solved before our proposed solutions will become viable. We address some of these issues in our thesis.
152

One Drop | Mobile on iPhone and Apple Watch: An Evaluation of HbA1c Improvement Associated With Tracking Self-Care

Osborn, Chandra Y, van Ginkel, Joost R, Marrero, David G, Rodbard, David, Huddleston, Brian, Dachis, Jeff 29 November 2017 (has links)
Background: The One Drop vertical bar Mobile app supports manual and passive (via HealthKit and One Drop's glucose meter) tracking of self-care and glycated hemoglobin A(1c) (HbA(1c)). Objective: We assessed the HbA(1c) change of a sample of people with type 1 diabetes (T1D) or type 2 diabetes (T2D) using the One Drop vertical bar Mobile app on iPhone and Apple Watch, and tested relationships between self-care tracking with the app and HbA(1c) change. Methods: In June 2017, we identified people with diabetes using the One Drop vertical bar Mobile app on iPhone and Apple Watch who entered two HbA(1c) measurements in the app 60 to 365 days apart. We assessed the relationship between using the app and HbA(1c) change. Results: Users had T1D (n=65) or T2D (n=191), were 22.7% (58/219) female, with diabetes for a mean 8.34 (SD 8.79) years, and tracked a mean 2176.35 (SD 3430.23) self-care activities between HbA(1c) entries. There was a significant 1.36% or 14.9 mmol/mol HbA(1c) reduction (F=62.60, P<.001) from the first (8.72%, 71.8 mmol/mol) to second HbA(1c) (7.36%, 56.9 mmol/mol) measurement. Tracking carbohydrates was independently associated with greater HbA(1c) improvement (all P<.01). Conclusions: Using One Drop vertical bar Mobile on iPhone and Apple Watch may favorably impact glycemic control.
153

Mobile phones and cloud computing : A quantitative research paper on mobile phone application offloading by cloud computing utilization

Hamrén, Oskar January 2012 (has links)
The development of the mobile phone has been rapid. From being a device mainly usedfor phone calls and writing text messages the mobile phone of today, or commonlyreferred to as the smartphone, has become a multi-purpose device. Because of its size andthermal constraints there are certain limitations in areas of battery life andcomputational capabilities. Some say that cloud computing is just another buzzword, away to sell already existing technology. Others claim that it has the potential to transformthe whole IT-industry. This thesis is covering the intersection of these two fields byinvestigating if it is possible to increase the speed of mobile phones by offloadingcomputational heavy mobile phone application functions by using cloud computing. Amobile phone application was developed that conducts three computational heavy tests.The tests were run twice, by not using cloud computing offloading and by using it. Thetime taken to carry out the tests were saved and later compared to see if it is faster to usecloud computing in comparison to not use it. The results showed that it is not beneficial touse cloud computing to carry out these types of tasks; it is faster to use the mobile phone.
154

De l'art mobile au Mobile Art : ou comment la technologie mobile influence la nature des oeuvres / From mobility in art to Mobile Art : or how mobile technology does affect the nature of artworks

Desjardins, Marie-Laure 24 January 2017 (has links)
Le début du XXIe siècle se caractérise par l'explosion des échanges via Internet et par la multiplication des objets connectés, au premier rang desquels le Smartphone (apparu en 2007). Autant d'appareils qui permettent de recevoir et d'envoyer des informations sous des formes diverses (messages vocaux, images, vidéos, textes, etc.). Les modes de communication et les usages qui en découlent se sont multipliés et propagés. C'est désormais en milliards que se comptent les utilisateurs de Smartphones. Celte adoption en masse du Smartphone a radicalement transformé les habitudes de tout un chacun, sans distinction de génération, de sexe, de catégorie socioprofessionnelle, de culture, d'appartenance géographique, etc. Envahissant la planète et pénétrant, dans le même élan, la sphère artistique, l'appareil a su se faire adopter par les créateurs, auprès desquels il joue désormais un rôle particulier, voire plusieurs: d'abord sujet de réflexion, Je Smartphone, à la technologie complexe et aux nombreuses fonctionnalités, est devenu à la fois outil de création, lieu d'expérimentation et d'exposition, moyen de transmission et de diffusion ... Connecté et tactile, il a créé une proximité et une relation nouvelles entre les artistes et le public. Bien qu'extrêmement diverses, les pratiques artistiques et les œuvres qu'il engendre n'en forment pas moins un corpus cohérent dont les ressorts communs diffèrent de ce qui caractérise habituellement une œuvre d'art. La force du Mobile An réside dans sa capacité d'adaptation et de métamorphose. Avec lui, l'imagination déborde sans cesse la technologie pour se mettre à la portée de tous. Il est un art démocratique, désacralisé et populaire. / The outburst of exchanges via Internet and the multiplication of connected devices -number one being the Smartphone which arrived in 2007 -characterize the beginning of the XXIst century. Ali these devices enable us to receive or send different forms of information (voice messages, images, videos, texts, and so on). These new ways of communicating and their new uses have been greatly developed and diversified ever since. There are now billions of Smartphone users around the world. This massive use of the Smartphone utterly transformed everyone's habits, whatever the generation, the gender, the socio-professional category, the cultural background, the geographical area ... After flooding the plane! and then ente1ing the artistic sphere, this device has been adopted by artists and is now playing a very special part in their creative process: first mere food for thought, the Smartphone characterised by a complex technology and a lot of functions has become a tool as well as a space for experimenting and exhibiting, a means to transmit and to spread any idea, information or creative work ... It is connected, tactile and responsible for a new kind of proximity and relationship between artists and their public. The artistic practices and artworks in which the Smartphone is used, though highly diverse, nevertheless belong to a consistent corpus, the underlying motivations of which being different from what generally characterises an artwork. The power of Mobile Art lays in its ability to adapt and to transform itself. Imagination is able to continuously extend beyond technology to bring itself within everyone's reach. It is a democratic, desacralized and popular art.
155

Eyes on the Road! : Off-Road Glance Durations when Performing Tasks on In-Vehicle Systems while Driving in a Simulator

Wahlberg, Linnea January 2013 (has links)
The 85th percentile off-road glances while performing three tasks on an in-vehicle system while driving in a simulator was investigated. The tasks were a radio task, a telephone task and a sound settings task which were performed at three occasions each. The distribution of 85th percentile off-road glance durations for each subject and task showed that durations differed between individuals rather than between tasks. It also turned out that durations longer than 2.00 seconds were not rare and 2 of 16 subjects had durations longer than 2.00 seconds in the radio task. Even though the distribution showed small differences between tasks on an individual level, differences on a group level were found between the tasks. A tendency of a learning effect was found, which implied a decrease in 85th percentile off-road glance durations as the tasks were performed at several occasions. A tendency of a floor effect in 85th percentile off-road glance durations, when the subjects are familiarized with tasks, was also found. Performance on a computerized trail-making test, measuring ability of visual search, motor speed and mental flexibility, was found not to be related with 85th percentile off-road glance durations.
156

Utilitarian and hedonic drivers of repurchase intent in consumer electronics : a study of mobile phones

Madevu, Hilton 12 May 2012 (has links)
This study sought to understand factors driving repurchase intentions for consumer electronics (CE) hardware and in particular mobile phones. The outcome of the study was expected to be of interest in academia and practice because it develops upon existing literature and identifies actionable variables that could be used to optimise market offerings. Based on a literature review it was hypothesised that the intent was driven by hedonic and utilitarian factors. These included conspicuousness and visibility; product bundling; reliability; technological features, usability of the product and the buyers’ age. The study tested these hypotheses using primary data. The method was employed to confirm the postulated drivers as well as to determine the direction of the effects. Data collection was conducted through a cross sectional internet survey enumerated in August 2010. The survey reached a broad sample of 144 responders. The analysis supported two of the six hypothesised drivers. The supported drivers were conspicuousness and usability. The recommendation was therefore to encourage the CE industry to focus on creating aesthetically appealing, fashionable devices that were intuitively easy to use requiring minimal assistance or product manuals. It also recommends that less emphasis be placed on durability, advanced features, on bundling additional extras and on targeting particular age groups. Copyright / Dissertation (MBA)--University of Pretoria, 2012. / Gordon Institute of Business Science (GIBS) / unrestricted
157

iSpace? : identity & space : a visual ethnography with young people and mobile phone technologies

Jotham, Victoria Anne January 2012 (has links)
Mobile phone technologies are transforming how young people think, work, play and relate to each other. However, a central concern for the thesis is that education policy and practice far too often resembles an industrial model that is standardised, mechanistic and linear and that rarely reflects the informational, dynamic and creative lives of young people. In particular, the educational project fails to connect with the way young people use their mobile phone technologies to multi-task, connect, and create content at a precipitous rate. This thesis focuses on the ways in which mobile phone technology is now a significant influence in the way young people develop a sense of self, and a sense of identity and agency that permeates the way they engage with education. The specific research questions that follow from this are: how are young peoples’ identities shaping the meaning and use of mobile phones within (im)material culture? How is the relationship between identity and the creation and use of social space being defined through mobile phone technology? And, taken together how might these processes of identity development influence the way the educational project develops in the future? This thesis addressed these aims by conducting a visual ethnographic study over three years, using participation observation in a sixth-form college in the UK that included video interviews with seven college students. The research has produced a conceptual framework that documents a number of key findings that include: (a) the mobile phone has an immediate symbolic value to young people providing signals about the user’s identity, or presentation of the self; (b) the mobile phone also helps facilitate the performance of lived experiences and is actively part of assisting in various forms of agency. (c) The mobile phone enables a constant flow of (re)presentations of young people that reflects a fluidity of identity that characterises key aspects of contemporary social life. Finally, (d) the mobile phone also supports and enhances the maintenance of social space through the maintenance of social groups and also crucially, the feeling of being oneself. The main conclusion drawn from this research is that too often education systems overlook that fact that learning for young people is typically, and inevitably, personal and yet at the same time located in connected, information-driven environments that are predisposed to digital technologies. Therefore, this research argues for educational policy makers and practitioners to think creatively about how to develop education in ways that fundamentally support young people in their (re)construction of a personalised landscape for learning through their mobile phone technologies.
158

Kognitiv belastning och fördomar : Bidrar mobiltelefonanvändande till ökad rasism?

Uhlin, Anna January 2017 (has links)
Forskning har visat att kognitiv belastning påverkar stereotyper och fördomar och hur människan agerar på dem. Då mobiltelefoni är en variant av kognitiv belastning som ökar undersöktes huruvida kognitiv belastning i form av mobiltelefonliknande input påverkar implicita fördomar samt om effekten skiljer sig beroende på kön och ålder. Deltagare var 162 studenter (94 kvinnor) i åldrarna 19–59 år (Md = 24) från en medelstor mellansvensk stad. Under studiens första del läste deltagarna, med eller utan mobiltelefonliknande störning, en vinjettext om en arbetslös man från antingen Västmanland eller Somalia och skattade därefter sin uppfattning om mannen i syfte att exponera implicita fördomar. Studiens andra del mätte explicita fördomar genom Modern Racial Prejudice scale. Resultatet bekräftade inte hypotesen att mobilstörning medför ökade implicita fördomar. En tendens att uppfatta invandraren mindre och svensken mer som belastning vid mobilstörning erhölls. Resultatets indikationer för stereotypbilden av invandraren och förändrade fördomar i samhället diskuterades.
159

Vývoj technologií mobilních zařízení / Technology Development of Mobile Devices

Stejskal, Jiří January 2013 (has links)
This thesis is focused on the technology of mobile devices. In the first part I analyse the technical parameters of the mobile device in detail, I mention each parameter and its importance, pitfalls and benefits. The second part is focused on mobile operating systems, especially iOS, Android and Windows Phone. The operating systems are analysed from the perspective of technological complexity, which builds on the analysis of the technology of mobile devices. The third part consists of future prediction. I describe hypothetical future development for both of previous parts of my survey. Approximate future development is mentioned in each chapter of of both first and second parts. The main benefit(contribution) of this work is the compact view on the issue of the technology of mobile devices. It helps reader to make a complex overview of the evolution and possibilities on the current mobile devices market.
160

Analýza navigačních systémů ve vozidlech / Vehicle Navigation Systems Analysis

Beran, Pavel January 2011 (has links)
This piece of Master's thesis deals with basic means of navigation, with emphases on satellite navigation and mobile phone navigation. It explains the signal receiving principals, global positioning and how it works with particular devices. It also covers information of how to convert data using various programs. And finally it shows the results of practical verification of the accuracy in locating position, altitude, azimuth and speed by using the navigation.

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