<p>From mobile, cable-free re-charging of electric vehicles, smart phones and laptops to collecting solar electricity from orbiting solar farms, wireless power transfer (WPT) technologies offer ...consumers and society enormous benefits. Written by innovators in the field, this comprehensive resource explains the fundamental principles and latest advances in WPT and illustrates key applications of this emergent technology.</p> <p>Key features and coverage include:</p> <ul> <li>The fundamental principles of WPT to practical applications on dynamic charging and static charging of EVs and smartphones.</li> <li>Theories for inductive power transfer (IPT) such as the coupled inductor model, gyrator circuit model, and magnetic mirror model.</li> <li>IPTs for road powered EVs, including controller, compensation circuit, electro-magnetic field cancel, large tolerance, power rail segmentation, and foreign object detection.</li> <li>IPTs for static charging for EVs and large tolerance and capacitive charging issues, as well as IPT mobile applications such as free space omnidirectional IPT by dipole coils and 2D IPT for robots.</li> <li>Principle and applications of capacitive power transfer.</li> <li>Synthesized magnetic field focusing, wireless nuclear instrumentation, and future WPT.</li> </ul> <p>A technical asset for engineers in the power electronics, internet of things and automotive sectors, <i>Wireless Power Transfer for Electric Vehicles and Mobile Devices</i> is an essential design and analysis guide and an important reference for graduate and higher undergraduate students preparing for careers in these industries.</p>
Denne artikel er en retsfonetisk undersøgelse i hvordan telefoniske båndpasfiltre påvirker talesignalet, med særligt fokus på dansk /t/. Der fokuseres særligt på tre forskellige slags telefoniske ...forbindelser: fastnetforbindelser; VoLTE, som er det mest moderne telefonsignal og benyttes i nyere smartphones; og AMR, som stadig benyttes i det meste mobiltelefoni, og som ved dårlig dækning leverer et dårligere signal end fastnetforbindelser. Artiklen viser hvordan der er variation i udtalen af dansk /t/ som potentielt kan bruges til at identificere en specifik taler, f.eks. i retsfonetisk sammenhæng. Tre forskellige kilder til /t/-variation præsenteres: regiolektal variation, variation i udtalen af fremmedsprog, og idiolektal variation blandt talere af rigsdansk. For alle disse variationskilder vises det hvordan de forskellige telefoniske forbindelser påvirker talesignalet, og særligt hvordan fastnet- og AMR-forbindelser udvisker meget af variationen fordi disse forbindelser ikke bærer særligt høje frekvenser. De parametre, som en retsfonetiker ville kigge på i en optagelse af høj kvalitet, vil altså ofte ikke være tilgængelige i en optaget telefonsamtale. Artiklen foreslår til sidst nogle andre parametre i talesignalet som kan være værd at kigge på, hvis man leder efter variation i /t/-udtale i en telefonoptagelse.
Cilj: Mikroorganizmi preživljavaju na različitim površinama koje na taj način postaju potencijalni rezervoar infekcije. Cilj ovog istraživanja bio je utvrditi razinu i vrstu mikrobne kontaminacije na ...mobilnim uređajima studenata Medicinskog fakulteta i laboratorijskih djelatnika u Kliničkom bolničkom centru u Rijeci te utvrditi postoje li razlike s obzirom na spol ispitanika te vrstu tipkovnice mobilnog telefona.
Ispitanici i metode: U istraživanju je sudjelovalo ukupno 154 ispitanika, 83 studenata medicine i 71 laboratorijski djelatnik. Uziman je otisak s površine njihovih mobilnih telefona CT3P agarom te se nakon inkubacije od 24 sata na 35±2°C odredio ukupan broj mezofilnih aerobnih bakterija po cm2 (CFU/cm2). Bakterije su identificirane na temelju makroskopskog i mikroskopskog izgleda te odgovarajućih biokemijskih testova.
Rezultati: Ukupan broj bakterija, bio je značajno veći u skupini studenata te muških ispitanika. U obje skupine ispitanika na mobilnim uređajima dominiraju Staphylococcus. epidermidis i drugi koagulaza negativni stafilokoki. Međutim, u obje skupine ispitanika utvrđeno je prisustvo Staphylococcus aureus te enterokoka, dok je bakterija iz roda Proteus utvrđena samo u skupini laboratorijskih djelatnika. Nije bilo značajne razlike u mikrobnoj kontaminaciji mobilnih telefona s tipkovnicom u odnosu na one s ekranom osjetljivim na dodir.
Zaključak: Razina i vrsta mikrobne kontaminacije na mobilnim uređajima može predstavljati potencijalni izvor infekcije. S obzirom na to da su izolirane bakterije, Staphylococcus aureus, enterokoki te enterobakterije poznati uzročnici bolničkih infekcija, smatramo opravdanim pripremu i uvođenje smjernica za provođenje i kontrolu higijene mobilnih telefona u zdravstvenim ustanovama.
A smartphone battery can be charged without an external power source by applying a portable charger that transforms mechanical energy into electricity by means of magnetic induction. Its essential ...part is a permanent magnet made of a rather expensive and, from the point of view of availability as well ecology, problematic material. The magnet is usually assembled from cylindrical parts. In order to reduce the raw-material consumption and to simplify the production, we propose a single-piece design in the form of a cylinder with notches. By means of the finite-element modelling, we optimize the dimensional parameters and prove that our proposal is more efficient than standard solutions.
André Caron and Letizia Caronia look at teenagers' use of text messaging to chat, flirt, and gossip. They find that messaging among teens has little to do with sending shorthand information quickly. ...Instead, it is a verbal performance through which young people create culture. Moving Cultures argues that teenagers have domesticated and reinterpreted this technology.
Mobilno učenje ili m-učenje omogućuje moderan način podrške procesima učenja putem mobilnih uređaja. Jedan od načina realizacije m-učenja je primjena BYOD modela na nastavi, prema kojem učitelji ...uglavnom iskazuju negativan stav smatrajući da korištenje mobitela u obrazovanju bitno ne pridonosi kvaliteti nastavnog procesa. Istraživanje za potrebe ovog rada provedeno je u ožujku školske godine 2018./2019., na uzorku od 401 učenika predmetne nastave I. i III. OŠ Varaždin. Cilj je bio ispitati stavove i preferencije učenika osnovnih škola o korištenju mobitela u sklopu nastavnog procesa te postoji li razlika u percepciji učenika osnovnih i srednjih škola o dopuštenju da donose vlastite uređaje za aktivnosti povezane sa školom. Rezultati istraživanja pokazuju da čak 65,69% učenika tvrdi da im je nastava zanimljivija kada smiju koristiti svoj mobilni uređaj, a 70,38% ispitanika želi da više učitelja primjenjuje BYOD model na nastavi. Također, rezultati pokazuju i da se u svojim razmišljanjima o dopuštenju da donose vlastite uređaje za aktivnosti povezane sa školom ne razlikuju značajno od učenika srednjih škola.
Mobile learning or m-learning makes possible the modern ways of learning processes support by using mobile devices. One of the ways of realisation of m-learning is the usage of BYOD model in classroom, towards which teachers mostly show the negative attitude considering that the use of mobile devices in education does not contribute in great deal to the quality of teaching process. The research for the demands of this paper was carried out in March of the school year 2018 /2019 on the sample of 401 students of the subject teaching of 1st and 3rd primary schools Varaždin. The aim was to examine the attitudes and preferences of the primary school students about the use of mobile devices as a part of a teaching process as well as if there is a difference in the perception of primary and secondary school students about the allowance to bring their own devices for the school activities. The results of the research show that even 65,69% of the students claim that the teaching lessons are more interesting when they are allowed to use their mobile device, and 70,83% of them want that their teachers use BYOD model in teaching. In addition, the results show that in their opinion to bring their devices for school activities do not differ in great deal from the opinion of the secondary school students.
Studying Mobile Media Hjorth, Larissa; Burgess, Jean; Richardson, Ingrid
2012, 20120423, 2012-03-26, 2012-04-23, Letnik:
39
eBook
The iPhone represents an important moment in both the short history of mobile media and the long history of cultural technologies. Like the Walkman of the 1980s, it marks a juncture in which notions ...about identity, individualism, lifestyle and sociality require rearticulation. this book explores not only the iPhone's particular characteristics, uses and "affects," but also how the "iPhone moment" functions as a barometer for broader patterns of change. In the iPhone moment, this study considers the convergent trajectories in the evolution of digital and mobile culture, and their implications for future scholarship. Through the lens of the iPhone-as a symbol, culture and a set of material practices around contemporary convergent mobile media-the essays collected here explore the most productive theoretical and methodological approaches for grasping media practice, consumer culture and networked communication in the twenty-first century.
Take your Android programming skills to the next level by unleashing the potential of Android StudioExpert Android Studio bridges the gap between your Android programing skills with the provided ...tools including Android Studio, NDK, Gradle and Plugins for IntelliJ Idea Platform. Packed with best practices and advanced tips and techniques on Android tools, development cycle, continuos integration, release management, testing, and performance, this book offers professional guidance to experienced developers who want to push the boundaries of the Android platform with the developer tools. You'll discover how to use the tools and techniques to unleash your true potential as a developer. Discover the basics of working in Android Studio and Gradle, as well as the application architecture of the latest Android platformUnderstand Native Development Kit and its integration with Android StudioComplete your development lifecycle with automated tests, dependency management, continuos integration and release managementWriting your own Gradle plugins to customize build cycleWriting your own plugins for Android Studio to help your development tasks.Expert Android Studio is a tool for expert and experienced developers who want to learn how to make use of the tools while creating Android applications for use on mobile devices.
Beginning Android Games Zechner, Mario
2011, 2012, 2011-04-13T00:00:00, 2011-04-19, 2012-11-29, c2011
eBook
Beginning Android Gamesoffers everything you need to join the ranks of successful Android game developers. You'll start with game design fundamentals and programming basics, and then progress towards ...creating your own basic game engine and playable games. This will give you everything you need to branch out and write your own Android games. The potential user base and the wide array of available high-performance devices makes Android an attractive target for aspiring game developers. Do you have an awesome idea for the next break-through mobile gaming title? Beginning Android Gameswill help you kick-start your project. The book will guide you through the process of making several example games for the Android platform, and involves a wide range of topics:The fundamentals of game development The Android platform basics to apply those fundamentals in the context of making a game The design of 2D and 3D games and their successful implementation on the Android platform
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