- / The research presented in this master thesis is based on two complementary studies conducted in Greece, to the University of Patras, Department of Educational Science and Early Childhood Education and in France, to the University Paris 5, Department of Humain and Social Sciences. The Research question of our study is: How university students perceive mobile technology in relation with the educational process and their everyday lives? Our objectives are: · exploring the attitudes, opinions and representations, of university students concerning mobile technology in general and as an instrument for the educational process and · investigating cultural differences’ influence upon mobile technology usage by university students, The research had four phases: literature review on mobile learning and mobile devices in order to identify the most popular mobile devices and the devices the research community is more concerned with: that is personal digital assistants (PDAs). This is a research study on the attitudes, opinions and representations of second year Greek university students from the Department of Educational Science and Early Childhood Education from the University of Patras, Greece, related to mobile technology (PDAs).The findings of the study: PDAs not popular among Greek students, combined with the fact that we wanted a more diverse, abundant student population, motivated us to continue our exploration with new studies. The third phase consisted of a research study on the attitudes, opinions and representations of the French university students from the Department of Human and Social Sciences, Sorbonne related to mobile technology. The questionnaire allowed subjects to first choose the main mobile device used for learning. This study has not gathered a satisfactory amount of data, however from the gathered data we have been driven towards exploring laptops in relation with their position in the life of Parisian students regarding learning. Also to meet time constraints and the desired number of respondents we enlarged the target group to students from any Parisian university. In the fourth phase we have conducted a research study on the attitudes, opinions and representations of the students of Parisian universities (PU) related to mobile technology: laptops. The obtained results gave us a better view about what students want from mobile technology and how they understand the use of it for educational purposes.

Software for mobile devices is becoming increasingly popular. The limited resources and limited user interface brings new issues in software development process for mobile devices. These limitations should be considered especially in design and testing phases of software development process. The software for mobile devices can not be thoroughly tested, because unit tests can not be stored in mobile device due to the lack of storage on it. Testing results can not be easily observed on small screens of mobile devices. This work depictures the influence of mobile technologies to software development process. The influence is exemplified with a project “Mobile Professor”. This work concentrates on problems encountered in software testing process for mobile devices especially in unit testing. The work presents other authors suggested solutions for earlier mentioned problems, and also suggest the new approach for performing unit testing for mobile devices, which does not suffer for these limitations of mobile devices. Existing and suggested methods are compared and evaluated experimentally.

Šiuolaikinės technologis tobulėja labai sparčiai – itin greiti dedikuoti serveriai, didelio pralaidumo interneto kanalai, leidžia vis daugiau taikomųjų programų perkelti į virtualią erdvę, vadinamą „Debesų kompiuterija“. Šioje erdvėje vykstantys procesai užtikrina, kad visi viešinami kompiuteriniai resursai, pvz., programinė ir techninė įranga bei interneto srautas būtų optimaliai paskirstytas. Tai suteikia palankias sąlygas atsirasti naujoms paslaugoms: daugialypės informacijos transliavimas, dokumentų redagavimas internete ir pan. Tokio tipo paslaugos yra paremtos „plono kliento“ architektūra, kuri ypač svarbi mobiliesiems įrenginiams. Pagrindinis šios architektūros privalumas – taikomosios programos, kurioms reikia daug skaičiavimo išteklių, gali būti vykdomos serveriuose, o rezultatai pateikiami mobiliųjų įrenginių ekranuose. Faktas, jog programos nėra vykdomos mobiliajame įrenginyje, sumažina tikimybę, jog svarbi informacija bus užkrėsta virusų, kirmėlių. Tarp daugelio egzistuojančių mobiliųjų įrenginių problemų, noriu išskirti dvi: energijos sąnaudos ir informacijos apsauga. Pirmoji problema egzistuoja dėl neadekvataus progreso tarp kompiuterinių resursų ir baterijos energijos talpos (pvz., procesoriaus sparta per kelis metus padidėja keletą kartų, tačiau baterijos energijos talpa padvigubinama tik kartą į dekadą). Antroji problema yra artymai susijusi su pirmąją. Šiandien žmonės nori dirbti įvairiose vietose, tad atsiranda grėsmė, jog mobilus įrenginys, įskaitant... [toliau žr. visą tekstą] / Nowadays technologies are being improved rapidly – extremely fast dedicated servers, high internet and network throughput, enables more and more applications to be moved to a virtual space, which is called ‘Cloud computing’. Cloud computing is responsible that all shared computer resources, like Software, Hardware and Network would be allocated for services in optimal way. This feature enables to appear new services, like media streaming, documents editing online etc. This kind of services are based on ‘Thin client’ architecture, which is especially important for mobile devices. Main feature of this architecture is that applications which require many computations, now can be executed in dedicated servers and results can be displayed in mobile device screen. Fact, that aplication is not executed in mobile device environment decreases probability that important information will be infected by viruses, worms etc. However, between many existing problems with mobile devices there are two major which should be stated in the first place: energy consumption and information security. The first issue is due to inadequate progress of computational resources and battery energy power (e.g., CPU speed, memory capacity is being increased several times within a few years, while battery power doubles only in a decade). The second issue is closely related with the first one. Today people want to work anywhere, so there is abillity that mobile devices including important information could... [to full text]

Duomenų sinchronizacija yra neatsiejama šiomis dienomis, kuomet eina kalba apie paskirstytas aplikacijas, kurios veikia mobiliuose įrenginiuose. Kuomet duomenys yra sinchronizuojami mobiliajame įrenginyje, jų vartotojai yra nepriklausomi nuo duomenų serverio ir gali laisvai naudotis lokaliais duomenis atsijungę nuo tinklo. [14] Šiame darbe išnagrinėjome galimas duomenų prieigos architektūras: 1. Visuomet atsijungęs 2. Visuomet prisijungęs 3. Mišrus Taip pat aptarėme techninės realizacijos ypatumus, problemas su kuriomis susiduriama, kuriant sinchronizacijos algoritmus bei būtiną informaciją reikalingą šių algoritmų funkcionavimui (ID valdymas, pakeitimų sekimas, greita/lėta sinchronizacija ir kt.). Projektinėje dalyje buvo išnagrinėtos jau egzistuojančios sistemos architektūra, bei aprašyti reikalingi pakeitimai, tam kad būtų galima įtraukti sinchronizacijos procesą į sistemos funkcionalumą. Galiausiai detaliai išanalizavome mišrios duomenų prieigos architektūrą, jos paskirtį, privalumus ir trūkumus. Taip pat sudarėme imitacinį modelį pagal šios architektūros principus panaudodami sudėtingų sistemų formalizavimo agregatinį metodą bei atlikome jo parametrų analizę. / Distributed applications are modeled around replicating copies of the same data on many hosts in a network for a variety of reasons. For one, system designers can alleviate the single-server implosion problem and instead distribute client requests for data across many hosting servers. Second, making data locally available on a host speeds up applications because the applications do not block for network input/output as data is transmitted. In this work we have analyzed several data access architectures: 1. Always offline 2. Always online 3. Mixed architecture Also we have described technical implementation details, problems which occur developing synchronization algorithms and mandatory information which is needed for these algorithms to work correctly (ID handling, change detection, fast/slow synchronization etc.). Furthermore, we investigated existing system architecture and defined mandatory changes needed for incorporating synchronization process into system functionality. Finally, we did detail analysis of mixed data access architecture, which included real world appliance, pros and cons. After that we created a model using complex systems formalization aggregation method which was based on these architecture principles. Also we did models parameter analysis in experimental part.

Magistro baigiamaje darbe nagrinėjama plačiai naudojamų asimetrinių ir simetrinių šifrų bei maišos funkcijų įtaka mobilių įrenginių energijos suvartojimui. Darbe ištirti AES, Camellia ir Serpent simetriniai blokiniai ir RC4 simetrinis srautinis šifras. Tirti asimetriniai šifrai: RSA, DSA, ECDSA ir ElGamal bei MD5, SHA1, SHA2 ir Whirlpool maišos funkcijos. Suformuluotas ir pasiūlytas baterijos elgsenos matematinis modelis. Skirtingi kriptoalgoritmai palyginti energijos sąnaudų atžvilgiu ir atrinkti našiausi kiekvieno tipo šifrai. / Main topic of Master thesis is analysis on how widely used asymmetric and symmetric ciphers and hash functions influence energy consumption then used on mobile devices. In this paper AES, Camellia and Serpent block ciphers and RC4 stream cipher are being analyzed. There were RSA, DSA, ECDSA and ElGamal asymmetric ciphers and MD5, SHA1, SHA2 and Whirlpool hash function analyzed too. Proposed mathematical model of battery behaviour. Different ciphers were compared to each other and energy-wise best one are pointed out from each cipher type.

Mobilieji įrenginiai tobulėja ir pateikia vis daugiau galimybių jų vartotojams. Tokie įrenginiai naudojami tiek asmeniniais, tiek darbo tikslais, kas sukelia papildomų saugos grėsmių įmonėms. Esant tokiai situacijai, reikalingos papildomos valdymo priemonės, kurios užtikrintų asmeninių įrenginių saugos konfigūravimą, atitinkantį organizacijos saugos politiką. Organizacijos saugos politika privalo atsižvelgti į dvi pagrindines sritis: organizacijos sistemų saugumą ir mobiliojo įrenginio saugumą. Magistrinio darbo tikslas – išnagrinėti mobiliesiems įrenginiams keliamas grėsmes bei sudaryti mobiliųjų įrenginių saugios konfigūracijos paramos sistemos prototipą. / The mobile industry is evolving rapidly and new mobile devices with sophisticated capabilities are released almost every day. The technical advancements in mobile industry have resulted in increase of security threats and attacks. To provide strong security mechanism a combination of solutions need to be implemented at different levels based on enterprise mobile application security requirements. Enterprise mobile security should ensure two key components: enterprise system security and device security. The aim of this paper is to create secure configuration decision support system prototype for personal devices.

Sitting with mobile devices In my major work I explore how people sit more hunched with a small screen in hand, despite the existence of ergonomic office chairs and other seating options. My question is if I can impact the user, and encourage them to obtain a better posture with the help of the armchairs rests, and in this way minimize the impact on the neck. As a designer I want to comment on, but also highlight our use of mobile devices by adapting the shape of the armchair to fit this need. / Ett sittande med mobila enheter I mitt examensarbete undersöker jag som designer hur människan sitter allt mer hopkrupet med en liten skärm i handen trots att det finns ergonomiska kontorsstolar och andra sittartefakter. Jag undrar om jag kan påverka användaren genom att hitta en ny form i karmstolens armstöd och på såsätt undvika eventuella låsningar och smärtor i nacke. Jag som designer vill kommentera, och även främja vårt användande av mobila enheter genom att förändra karmstolen så att armstöden passar vårt sittandet idag.

The purpose of this theoretical thesis is to research the problem: producing optimized content for handheld real-time CG applications. This thesis is based on existing literature studiesregarding the subject. It will explore the topic on how to deal with draw calls, shaderoptimizations, hard/smooth edges and how engines deal with polygons and textures and howthis correlates with current technical limitations of current game engines for handheld realtime applications such as the iPhone. On these grounds, the thesis will expand on the subject of how those topics affect the hardware; more specifically targeted the GPU and CPU onmobile devices. Today, the hardware used on mobile devices on the market is limited; it is important tounderstand that a lot of factors come in to play and making optimization a part of the design, not a final step regarding the creation of content is vital when creating CG applications formobile devices. A closer look at the available evidences suggests that when dealing with the limited resources available every performance aspect should be closely looked into. It is vital to optimize the content and correlate your game budget accordingly to the marketed device. In the end it will make for a better game. This thesis sheds a light on the development strategiesfor CG applications on handheld devices.

Darbe yra apžvelgiamos NURBS paviršių atvaizdavimo realizavimo problemos mobiliesiems įrenginiams. Pagrindinis darbo tikslas yra įsitikinti tokios realizacijos galimumu, bei surasti kiek įmanoma efektyvesnį būdą, išsprendžiantį mobiliųjų platformų realizacijų problemas. Dar vienas tikslas, sukurti prototipinį sprendimą, padengiantį NURBS standartą. Analizei pasirinkta M3G mobiliosios grafikos standartas, kuris šiuo metu yra labiausiai paplitęs. Realizacijų palyginimui buvo pasirinkti du algoritmai: Oslo ir tiesioginis. Atlikus veikimo analizę nustatyta, jog tiesioginis algoritmas yra efektyvesnis, kurio pagrindu buvo išbaigtas NURBS standartas, realizuojant Trimmed NURBS modelius. / In the thesis it is analyzed the problems related with NURBS rendering implementation for mobile devices. The main goal of the thesis is to make find out if such implementation is possible at all and to find most effective way to implement it. One more goal is to create a prototype implementation for NURBS standard including Trimmed NURBS. M3G mobile graphics platform was chosen for analysis, which is mostly adopted across the vendors nowadays. There was chosen two rendering algorithms for analysis purposes: Oslo and directional. During analysis it was discovered, that Directional algorithm is more effective than Oslo, and it was adapted to prototype solution – Trimmed NURBS.

Is There an App for That? The Usage of Mobile Technology for the Purposes of Teaching Health Education in Grade 4 and 5. Wahid Khan. Master of Arts. Curriculum, Teaching and Learning. University of Toronto. Year of Convocation: 2014. The use of mobile devices in elementary schools has steadily increased in the last few years. These mobile devices harness many tools that can help teachers teach classroom material and help students become better students academically. The research question was “How can mobile devices be used to teach health education?” Research was conducted in a grade 4 and 5 classroom to see which mobile apps worked best among teachers and students in conveying health education. Anecdotal notes and daily journaling over a two-month period documented how the students enjoyed playing games and also how engaged they were when they subsequently used the devices for non-gaming purposes. It is still unknown how well these apps conveyed messages of health. How the mobile apps are being used in the classroom and the content inside the mobile apps largely dictates the messages they can convey to the students.