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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.
911

Zvukový modul pro platformu FITkit / Sound Module for FITkit Platform

Bartoš, Pavel January 2009 (has links)
This work deals with module of the FITkit platform, which makes it able to play sound files like mp3, ogg, etc. The module also adds to FITkit some new peripherals: color LCD display with touch screen and USB interface, by which we can connect flash drive.
912

Dispenzní tisk tlustovrstvých past / The direct writing of thick film pastes

Ištvánek, Jan January 2010 (has links)
This work deals with the problem of the thick-film pastes and their printing. In the main chapter of this work, the realization of a workplace for thick-film pastes' printing is described. The construction of the realized plotter and the controlling electronics of the plotter is depicted in detail.In the following chapter, the console, through which the plotter is controlled via PC, and the CAD program, which serves for projecting of the motives printed, are described.In the final chapter of this work, the measured profiles of the paste printed for various settings of printing parameters and the photographs of the motives printed are stated.
913

Multilingual Literacy Practice in One School Community: Reading, Writing, and Being Across Japanese and English

Saternus, Julie A. 25 July 2019 (has links)
No description available.
914

Investigating Cognitive and Persuasive Effects of 360-degree Virtual Reality Community News Narratives on Memory Performance, Presence, Perception of Credibility, and Attitude Change

Atkins, Daniel Aaron 01 June 2020 (has links)
No description available.
915

How comics communicate on the screen: Telecinematic discourse in comic-to-film adaptations

Sanchez-Stockhammer, Christina 28 April 2021 (has links)
This paper explores the relation between the popular “Tintin” comics by the Belgian artist Hergé and Steven Spielberg’s successful film adaptation “The Adventures of Tintin” (2011) from a linguistic perspective. It explores how language use in the scriptovisual medium of the comic (which combines still images and printed text) is rendered in the audiovisual medium of film (which combines moving images and spoken language). After discussing general linguistic similarities between comics and films and the use of language in each of the two media, the paper compares the representation of voice, accent, thoughts, talking animals, sounds and written language in Spielberg’s screen adaptation to the original printed comic books. It analyses to what extent the language from comic books can be directly transferred to the filmic medium and investigates possible causes underlying any modifications in the above-mentioned domains.
916

Hochfrequenz‐Kommunikation gedruckter Antennen in herausfordernden dielektrischen oder metallischen Umgebungen

Zichner, Ralf 29 May 2013 (has links)
Die vorliegende Arbeit beschäftigt sich mit der Entwicklung von anwendungsspezifisch angepassten und drucktechnisch herstellbaren Antennen für Radio‐Frequency‐Identification (RFID) Anwendungen im Ultra‐High‐Frequency (UHF) und Super‐High‐Frequency (SHF) Frequenzbereich. Dabei werden alle Entwicklungsschritte und deren Abhängigkeiten vom Antennenentwurf über die Simulation, die Herstellung im Druckverfahren und die Antennenvermessung betrachtet. Die Alleinstellungsmerkmale der vorliegenden Arbeit liegen in der Erforschung von Antennen, welche eine hohe Funktionalität in herausfordernden dielektrischen oder metallischen Umgebungen (Glas, Holz, Papier, Aluminium, …) aufweisen sowie im Druckverfahren hergestellt werden. Mit Hilfe von FEM‐ und MoM‐Berechnungen werden neu entwickelte Antennenkonzepte wie 898 MHz‐Dipolantennen, 868 MHz‐Längsstrahler‐ Antennenkonfigurationen, 868 MHz‐(Reflektor)‐Antennenkonfigurationen und 5.8 GHz‐3D‐Dipol‐ Antennendesigns zur Erhöhung der Kommunikationsfähigkeit untersucht und beschrieben. Dabei werden hinsichtlich der 868 MHz‐Längsstrahler‐Antennenkonfiguration, zur Funktion in direkter metallischer Umgebung, Performance mindernde Depolarisationseffekte nachgewiesen. Eine Minimierung dieser Effekte wird mit der gezielten Krümmung elektromagnetischer Wellenfronten zwischen abstrahlendem Antennenelement und Reflektor erreicht. Der Nachweis wird anhand einer selbst entwickelten 868 MHz‐(Reflektor)‐Antennenkonfiguration geführt. Um die Leistungsfähigkeit gedruckter Antennen weiter zu steigern, werden Antennen mit gerichteter Abstrahlcharakteristik mit einer Resonanzfrequenz von 5.8 GHz und einer Frequenzbandbreite von 150 MHz entworfen. Als ein Ergebnis werden Antennen mit dreidimensionaler Geometrie vorgestellt. Die Besonderheit hierbei liegt in der planaren Herstellung der Antenne im Druckverfahren und der anschließenden dreidimensionalen Aufrichtung. Die entwickelten Antennen sind direkt in kommerzielle und industrielle Anwendung überführbar. / This doctoral thesis focuses on research and development in the field of novel, optimized and printed antenna structures for UHF and SHF-RFID applications in challenging dielectric and metallic environments. These antenna structures have a high level of functionality, the manufacturing costs are low and they can easily be integrated. At the beginning of this work, based on wave equations it had been deduced that the propagation of electromagnetic waves in different media is dependent on the two material parameters permeability and permittivity. Based on this knowledge and further application- and manufacturing-specific parameters (resonance frequency, radiation characteristics, impedance, properties of the object which is to be identified (form, geometry, permeability and permittivity) and manufacturing-specific properties (substrate, material and printed layer thereof)), dipole antenna designs for different dielectric environments (air, paper, glass or wood) were designed, investigated with the help of a simulation tool, manufactured employing screen and gravure printing technologies and characterized in an anechoic chamber. The employed printing technologies are very dynamic processes which depend on various process parameters. In order to improve the functionality of printed antenna structures, several dependencies between the printing processes and the achieved antenna properties have been investigated. Summed up, it can be stated that next to all manufacturing-specific dependencies, the antenna design itself is the most significant factor influencing the achievable antenna properties. Next to carrying out research on dielectric antennas in the near field, finding novel antenna concepts for the realization of highly functional UHF-RFID-transponder-antennas for the application on metallic objects was also part of this investigation. Important to account for is that the metallic objects influence the propagation of electromagnetic waves. In order to efficiently use this physical property of the reflection of electromagnetic waves, novel UHF-reflector-antenna configurations have been designed. Afterwards, its antenna-polarizations behavior was investigated in several simulations before the antenna was manufactured employing screen printing technology and characterized in an anechoic chamber. The developed antenna-configuration showed impressive RFID-reading distances up to 8.1 m (with a RFID-reader transmitting power of 1 W ERP) and compared to the state-of-the-art technology (reading distance approx. 5 m). Therefore this technology enhances the reading performance (distance) by approximately 60 %. In order to improve the communication quality of future RFID-systems, also novel, multi-directional 3D-RFID transponder antenna structures with a resonance frequency of 5.8 GHz were designed. Because of the increased resonance frequency compared to already existing UHF-RFID systems, the usage of a broader-band RFID-frequency range is possible (5.725 GHz – 5.875 GHz (150 MHz) instead of just several kHz). This allows identifying significantly more objects (> 100) in parallel. The three-dimensional layout of two antenna parts vertical to each other allows a directional (not omni-directional) radiation characteristic outside the enclosed volume of space. Because of this, the influence of dielectric materials (for instance content of product packages) on the functionality of the antenna could be significantly reduced. Also, it was shown that the designed 3D-antenna structure could easily be integrated directly on the interior of for instance product packages employing screen printing technology. After folding/erecting the product package, the antenna receives its three dimensional shape and its verified improved performance.
917

La qualité des repas en famille conditionne différemment l’association prospective entre les tendances d’habitudes télévisuelles à la petite enfance et les relations sociales à l’adolescence

Harandian, Kianoush 06 1900 (has links)
Contexte : Malgré les directives sur le temps d’écran, les enfants passent plus de temps sur des appareils électroniques qu’auparavant, ce qui en fait un facteur de risque important pour le développement social ultérieur. Les facteurs de protection à l’utilisation prolongée des écrans dans le contexte de l’enfance sont peu explorés. Partager des repas dans un contexte familial pourrait offrir un moyen de favoriser le développement psychosocial et de contrer les risques associés au temps d’écran élevé. Cette étude examine l’interaction entre l’environnement des repas en famille et la tendance de temps d’écran à la petite enfance sur les principales relations sociales des adolescents. Il est attendu qu’une meilleure qualité des repas en famille joue un rôle protecteur sur l’association entre les tendances d’habitudes d’écran et les relations sociales adolescentes. Méthode : Les participants sont 1 455 enfants (50,9 % de filles) de la cohorte de naissances de l’Étude longitudinale du développement des enfants du Québec. Les parents ont rapporté l’utilisation d’écrans des enfants à 2 et 6 ans et la qualité de l’environnement des repas en famille à 6 ans. Les parents et les enfants ont respectivement fourni des mesures sur la relation parent-enfant et la victimisation à 13 ans. Les analyses ont testé l’association directe entre les tendances du temps d’écran et la qualité de l’environnement familial durant les repas sur les relations sociales ultérieures, en utilisant des régressions linéaires. Les analyses de modération ont ensuite examiné l’interaction entre les tendances de temps d’écran et la qualité de l’environnement des repas en famille sur les relations sociales. Résultats : Nous avons observé qu’une hausse dans le temps d’écran était associée à une relation père-fille moins conflictuelle et moins de victimisation chez les filles ainsi qu’à des relations moins positives avec les deux parents et moins de victimisation chez les garçons. Pour tous, un meilleur environnement lors des repas était associé à des relations sociales plus saines avec les parents et les pairs. L’environnement familial lors des repas avait un effet modérateur distinct sur l’association entre les habitudes télévisuelles et les relations des filles avec leur mère ainsi que leurs pairs. Entre autres, lorsque les repas représentaient une occasion d’expression et de communication, une hausse du temps d’écran était associée à une relation mère-fille plus positive et moins conflictuelle. Étonnamment, les filles participant à des repas en famille moins positifs et ayant une tendance de temps d’écran plus élevée éprouvaient moins de victimisation à l’adolescence. L’interaction entre les tendances de temps d’écran et la qualité de l’environnement des repas en famille n’était pas trouvée significative pour les garçons. Conclusion : Encourager les repas familiaux représente une activité simple/rentable qui peut compenser certains risques à long terme associés à une utilisation accrue des écrans au-delà des caractéristiques individuelles et familiales préexistantes et concurrentes. Les initiatives de santé publique devraient considérer les repas en famille comme une stratégie d’intervention complémentaire aux directives d’utilisation des écrans. Les directives sur l’utilisation des écrans devraient considérer les repas en famille comme une stratégie compensatoire. / Background: Despite screen time recommendations, children are increasingly spending time on electronic devices, rendering it an important risk factor for subsequent developmental outcomes. Not much is known about protective factors in childhood context. Sharing meals could offer a way to promote psychosocial development and counter risks associated with screen use. This study examines the interaction between family meal environment and early childhood screen time on key adolescent social relationships. We expect that better mealtime environment plays a protective role in the association between screen time trends and adolescent social relationships. Method: Participants are 1455 millennial children (50.9% girls) from the Quebec Longitudinal Study of Child Development birth cohort. Parents reported on child screen use at ages 2 and 6 years and family meal environment quality at age 6 years. Parents and children reported on parent-child relationships and victimization experiences, respectively, at age 13 years. Multiple regression estimated the direct association between screen time trends and family meal environment quality and the interaction between screen time trends and family meal environment quality on later social relationship outcomes. Results: We observed that a greater increase in screen time was associated with a less conflictual father-daughter relationship and less peer victimization for girls as well as less positive relationships with both parents and less victimization for boys. For both girls and boys, a better mealtime environment was associated with better social relationships with parents and peers. For girls, early childhood screen time trends had distinct impacts on relationships with mothers and peers, conditional on mealtime environment. When family meals are an opportunity to express feelings and communicate, increasing trends in screen time are associated with more positive and less conflictual mother-daughter relationships. These same increases in screen time were associated with less peer victimization when family meal environment quality was more dysfunctional. No meaningful non-linear associations between screen time trends and family meal environment quality were observed for boys. Conclusion: Capitalizing on family meal environment represents a simple/cost-efficient activity that can compensate for some long-term risks associated with increased screen use, above and beyond pre-existing and concurrent individual and family characteristics. Public health initiatives may benefit from considering family meals as a complementary intervention strategy to screen use guidelines.
918

The Spillable Environment: Expanding a Handheld Device's Screen Real Estate and Interactive Capabilities

Clement, Jeffrey S. 07 August 2007 (has links) (PDF)
Handheld devices have a limited amount of screen real estate. If a handheld device could take advantage of larger screens, it would create a more powerful user interface and environment. As time progresses, Moore's law predicts that the computational power of handheld devices will increase dramatically in the future, promoting the interaction with a larger screen. Users can then use their peripheral vision to recognize spatial relationships between objects and solve problems more easily with this integrated system. In the spillable environment, the handheld device uses a DiamondTouch Table, a large, touch-sensitive horizontal table, to enhance the viewing environment. When the user moves the handheld device on the DiamondTouch, the orientation of the application changes accordingly. A user can let another person see the application by rotating the handheld device in that person's direction. A user could conveniently use this system in a public area. In a business meeting, a user can easily show documents and presentations to other users around the DiamondTouch table. In an academic setting, a tutor could easily explain a concept to a student. A user could effortlessly do all of this while having all of his/her information on the handheld device. A wide range of applications could be used in these types of settings.
919

Milling accuracy improvement of a 6-axis industrial robot through dynamic analysis : From datasheet to improvement suggestions

Eriksson, Peter January 2019 (has links)
The industrial robot is a flexible and cheap standard component that can becombined with a milling head to complete low accuracy milling tasks. Thefuture goal for researchers and industry is to increase the milling accuracy, suchthat it can be introduced to more high value added operations.The serial build up of an industrial robot bring non-linear compliance andchallenges in vibration mitigation due to the member and reducer design. WithAdditive Manufacturing (AM), the traditional cast aluminum structure couldbe revised and, therefore, milling accuracy gain could be made possible due tostructural changes.This thesis proposes the structural changes that would improve the millingaccuracy for a specific trajectory. To quantify the improvement, first the robothad to be reverse engineered and a kinematic simulation model be built. Nextthe kinematic simulation process was automated such that multiple input parameterscould be varied and a screening conducted that proposed the mostprofitable change.It was found that a mass decrease in any member did not affect the millingaccuracy and a stiffness increase in the member of the second axis would increasethe milling accuracy the most, without changing the design concept. To changethe reducer in axis 1 would reduce the mean position error by 7.5 % and themean rotation error by 4.5 % approximately, but also reduces the maximumspeed of the robot. The best structural change would be to introduce twosupport bearings for axis two and three, which decreased the mean positioningerror and rotation error by approximately 8 % and 13 % respectively. / En industrirobot är en anpassningsbar och relativt billig standardkomponent.Den kan utrustas med ett fräshuvud för att genomföra fräsoperationer med låg noggrannhet. Det framtida målet för forskare och industri är att öka noggrannheten vid fräsning så att dess användningsområde kan utökas till ändamål som kräver högre precision.Den seriella uppbyggnaden av en industrirobot medför icke-linjär styvhet och därmed utmaningar vid vibrationsdämpning. Detta på grund av den strukturella uppbyggnaden då en industrirobot kan förenklat sägas vara uppbyggd av balkelement som i ledpunkterna kopplas samman av växellådor. Med friformsframställning kan en mer komplex struktur erhållas jämfört med traditionellt gjuten aluminiumkonstruktion därmed skulle en ökad noggrannhet vid fräsning kunna uppnås.Det här examensarbetet föreslår strukturella ändringar som skulle kunna öka noggrannheten vid fräsning för en specifik fräsbana. För att kvantifiera förbättringen, var det först nödvändigt att utgående från tillgänglig data konstruktion en specific robot samt att bygga en kinematisk modell. Därefter automatiserades beräkningsflödet så att ett flertal indata kunde varieras. Detta resulterande i en kombinationsstudie som visade den mest gynsamma strukturella förändringen.Det visade sig att en minskning av balkelementens massa inte påverkade nogrannheten. Att öka styvheten i balkelementet från den andra axeln skulle d¨aremot öka nogrannheten mest utan att behöva ändra robotens uppbyggnad.Att byta växellåda i första axeln kan öka positionsnogrannheten med nära 7.5 % och rotationsnoggrannheten med cirka 4.5 % men ändringen sänker samtidigt den maximala hastigheten. Den bästa strukturella förändringen vore att introducera ett stödlager vid axel två respektive tre, vilket skulle förbättra positionsnogrannheten med cirka 8 % och rotationsnogrannheten med nära 13 %.
920

Miteinander, Gegeneinander und Füreinander: Gruppeninteraktion an einem Tabletop im Museum

Storz, Michael 02 January 2023 (has links)
Museen werden häufig von Gruppen wie z.B. Familien besucht, die ein Interesse daran haben, die Inhalte dieser Institutionen gemeinsam zu erkunden. Leider sind jedoch in vielen Museen interaktive oder gar gemeinschaftlich nutzbare Exponate weiterhin eine Seltenheit. Interaktive Tabletops können den Bedürfnissen von Besuchergruppen begegnen und kollaborative Gruppeninteraktionen ermöglichen.  Der Fokus dieser Arbeit liegt darauf, kollaborative Gruppeninteraktion an interaktiven Tischen für verschiedene Ausstellungskontexte einerseits herzustellen und andererseits detailliert zu untersuchen, um besondere Potentiale von interaktiven Tabletops für Gruppenkollaboration im Museum herauszuarbeiten.  Die Dissertation beschreibt dabei die iterative Entwicklung von zwei interaktiven Tabletop-Exponaten in ihrer physischen Gestaltung und ihren Anwendungen, die entwicklungsbegleitend durch drei In-the-wild-Studien unter realweltlichen Bedingungen weiterentwickelt wurden. In einer letzten In-the-wild-Studie wurden Gruppeninteraktionen am Tisch zum Zwecke der Interaktionsanalyse videografisch erfasst. Als Fundament für Entwicklung und Interaktionsanalyse dient eine Auseinandersetzung mit bestehenden Tabletopanwendungen in Museen hinsichtlich ihrer Potentiale für Gruppeninteraktionen. In der Interaktionsanalyse zeigte sich unter anderem, dass die Gestaltung der Anwendung als rundenbasiertes Spiel Einfluss auf die Gruppeninteraktion hat. Insbesondere konnte beobachtet werden, dass  Besucher*innen ihren Aufenthalt am Tabletopexponat sowohl mit ihrer Gruppe als auch mit dem Spielzustand koordinieren. Die Rundenbasiertheit der Anwendung motiviert Spieler*innen, ihre Gruppenmitglieder zu unterstützen und dadurch zudem das Voranschreiten des Spieles zu sichern. Aus den Ergebnissen der Interaktionsanalyse werden abschließend Implikationen für die Gestaltung von interaktiven Exponaten und ihre Anwendung für museale Kontexte abgeleitet.:Danksagung Einleitung Grundlagen Iterative Entwicklung eines Tabletopexponats Methodisches Vorgehen Interaktion am Tisch Gruppen- und Spielverpflichtung Intervention und Unterstützung Fazit Literatur / Museums are often visited by groups of people such as families, who commonly intend to explore and experience the museum space together. Unfortunately, many museums lack interactive exhibits that could facilitate such collaborative experiences. Interactive tabletops can satisfy such desires and enable collaborative group interactions. The focus of this thesis is on the facilitation and the analysis of collaborative group interactions on interactive tabletops in exhibition spaces. It identifies potentials of interactive tabletops for group collaboration in museums. The thesis describes the iterative development of two interactive tabletop exhibits in their physical form and their applications. This development was accompanied by three in-the-wild studies, which drove the evolution of hardware and software. In a final in-the-wild study group interactions on a tabletop exhibit were examined using interaction analysis. The development as well as the following analysis of group interactions on tabletop exhibits was based on the thorough analysis of existing tabletop exhibits and other studies of group interactions in museums. The detailed study of group interactions revealed among other things that the design of the application as a turn-based game had a significant influence on group interactions. Users coordinated their stay at the tabletop with their peers while considering the state of the game. The turn-based manner of the application motivated players to support their peers to advance through the game. The results of the interaction analysis lead to implications for the design of interactive exhibits and their application in museum spaces.:Danksagung Einleitung Grundlagen Iterative Entwicklung eines Tabletopexponats Methodisches Vorgehen Interaktion am Tisch Gruppen- und Spielverpflichtung Intervention und Unterstützung Fazit Literatur

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