- 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.
Search results
Showing 271 to 280 of 281 (0.01 seconds)| 271 |
Studium vlivů frekvenčních nestabilit oscilátorů v družicových komunikačních systémech / Studies of Influences of Oscillators Frequency Instabilities in Satellite Communication SystemsBaran, Ondřej January 2011 (has links)
The dissertation thesis deals with a study of an influence of a simultaneous incidence of an additive thermal noise and a multiplicative phase noise on the useful signal transmission in narrowband satellite communication systems. While the additive thermal noise affects the useful signal only on the receiver side of the communication system, the multiplicative phase noise is produced in all system oscillators. One investigates how the receiver filter bandwidth reduction takes effect on the influence of individual noise types. The thesis is divided into four units. The first one (chapters 4 and 5) solves the ways of modeling of both noise types. In the second part (chapter 6), on the simple example, the primary analysis of the phase noise influence is made. Basic modulation schemes used in the satellite communication are also discussed (chapter 7). Third part (chapter 8) is devoted to the modeling of a general digital system with a M PSK modulation made directly on the main carrier wave. The last part (chapter 9) describes the modeling of a digital system with a BPSK modulation on the auxiliary subcarrier wave followed by an SSB modulation on the main carrier wave. General conclusions are deduced from obtained simulation results.
|
| 272 |
Scénografie Jiřího Trnky v Národním divadle / Jiri Trnka's Scenography in the National TheatreVöröšová, Markéta January 2013 (has links)
Jiri Trnka (1912 - 1969) ranks among the foremost representatives of Czech modern art in the 20th century and alongside the most remarkable protagonists of the visual art scene over a period ranging from the late 1930s through the end of the1960s. He stood out within that movement for his multiple talents, as a draughtsman, book illustrator, puppet designer, painter, animated film-maker, sculptor and stage designer. He achieved admirable success in these fields of activity. In the early 40s a new prospect opened up for him connected with work in theatre, as he took up the post of stage designer at the National Theatre in Prague, an assignment which enabled him to put to use his specific talent for stagecraft. He created 13 stage decorations together. Trnka was able to create unforgettable productions thanks the cooperation with Jiri Frejka or Karel Dostal. I documented and explained Trnka's work in the context of the Nation Theatre during the Second World War. I defined his style in the relation to his contemporaries in the end of work. KEY WORDS Jiri Trnka, National Theatre, set designer, scenography, stage decoration, costume, properties, scene, 40s, space, stage, style, set, constructed set, stage design, didascalia, theatrical space, animated film.
|
| 273 |
The CRISPR-Cas systemStens, Cassandra, Enoksson, Isabella, Berggren, Sara January 2020 (has links)
Derived from and inspired by the adaptive immune system of bacteria, CRISPR has gone from basic biology knowledge to a revolutionizing biotechnological tool, applicable in many research areas such as medicine, industry and agriculture. The full mechanism of CRISPR-Cas9 was first published in 2012 and various CRISPR-Cas systems have already passed the first stages of clinical trials as new gene therapies. The immense research has resulted in continuously growing knowledge of CRISPR systems and the technique seems to have the potential to greatly impact all life on our planet. Therefore, this literature study aims to thoroughly describe the CRISPR-Cas system, and further suggest an undergraduate laboratory exercise involving gene editing with the CRISPR-Cas9 tool. In this paper, we describe the fundamental technical background of the CRISPR-Cas system, especially emphasizing the most studied CRISPR-Cas9 system, its development and applications areas, as well as highlighting its current limitations and ethical concerns. The history of genetic engineering and the discovery of the CRISPR system is also described, along with a comparison with other established gene editing techniques. This study concludes that a deeper knowledge about CRISPR is important and required since the technique is applicable in many research areas. A laboratory exercise will not only inspire but also provide extended theoretical and practical knowledge for undergraduate students.
|
| 274 |
Optimización teórico-experimental de sondas de calor para intercambio geotérmico (SGE) según condiciones hidrogeológicas, características geométricas y propiedades de sus materialesBadenes Badenes, Borja 01 February 2021 (has links)
[ES] Uno de los mayores retos para el mercado de bombas de calor geotérmicas es el alto coste asociado a la perforación de los intercambiadores de calor geotérmicos. Conseguir unos intercambiadores de calor geotérmicos más eficientes reduciría dicho coste, ya que sería necesaria una menor longitud de intercambiador para obtener las mismas temperaturas de trabajo en él (misma eficiencia de la bomba de calor).
La eficiencia térmica de un intercambiador de calor geotérmico está caracterizada por su resistencia térmica. Dicha resistencia térmica depende de una serie de elementos entre los que se encuentran: propiedades y caudal del fluido que recorre el intercambiador de calor, diámetro de la perforación geotérmica, geometría y materiales de la tubería del intercambiador de calor y las propiedades del material de relleno de la perforación (grouting).
Cuanto mayor sea la resistencia térmica del intercambiador de calor, menor será el calor transferido entre el fluido caloportador y el terreno, traduciéndose en una necesidad mayor de longitud de intercambiador enterrado. Por lo tanto, es necesario una reducción de este parámetro al mínimo posible.
En consecuencia, el objetivo principal de esta tesis doctoral consiste en, a partir de un modelo analítico comprensivo de cuantificación del impacto de los parámetros anteriores, realizar un estudio detallado para analizar su influencia combinada en la resistencia térmica del intercambiador geotérmico, pero también examinando dicho efecto en otros planos, como costes económicos de ejecución del intercambiador y de explotación (consumo eléctrico de la bomba de calor y costes de bombeo asociados). / [CA] Un dels majors reptes per al mercat de bombes de calor geotèrmiques és l'alt cost associat a la perforació dels bescanviadors de calor geotèrmics. Aconseguir uns bescanviadors de calor geotèrmics més eficients reduiria aquest cost, ja que seria necessària una menor longitud de bescanviador per a obtenir les mateixes temperatures de treball en ell (mateixa eficiència de la bomba de calor).
L'eficiència tèrmica d'un bescanviador de calor geotèrmic està caracteritzada per la seva resistència tèrmica. Aquesta resistència tèrmica depèn d'una sèrie d'elements entre els quals es troben: propietats i cabal del fluid que recorre el bescanviador de calor, diàmetre de la perforació geotèrmica, geometria i materials de la canonada del bescanviador de calor i les propietats del material de farciment de la perforació (grouting).
Com més gran sigui la resistència tèrmica del bescanviador de calor, menor serà la calor transferida entre el fluid termòfor i el terreny, traduint-se en una necessitat major de longitud de bescanviador enterrat. Per tant, és necessari una reducció d'aquest paràmetre al mínim possible.
En conseqüència, l'objectiu principal d'aquesta Tesi Doctoral consisteix en, a partir d'un model analític comprensiu de quantificació de l'impacte dels paràmetres anteriors, realitzar un estudi detallat per a analitzar la seva influència combinada en la resistència tèrmica del bescanviador geotèrmic, però també examinant aquest efecte en altres plans, com a costos econòmics d'execució del bescanviador i d'explotació (consum elèctric de la bomba de calor i costos de bombament). / [EN] One of the biggest challenges for the ground source heat pump market is the high cost associated with drilling geothermal borehole heat exchangers. Achieving more efficient geothermal heat exchangers would reduce this cost, since a shorter exchanger length would be required to obtain the same working temperatures in it (same efficiency of the heat pump).
The thermal efficiency of a geothermal heat exchanger is characterized by its borehole thermal resistance. This borehole thermal resistance depends on a number of parameters, mainly: properties and flow rate of the working fluid that flows through the borehole heat exchanger, diameter of the geothermal borehole, geometry and materials of the heat exchanger pipe and the properties of the borehole grouting material.
The higher thermal resistance of the heat exchanger, the less heat is transferred between the heat carrier fluid and the ground, resulting in an increased requirement for the length of the buried heat exchanger. Consequently, it is essential to reduce this parameter to the minimum possible.
Therefore, the main objective of this Ph. Doctoral Thesis is to carry out, based on a comprehensive analytical model of quantification of the impact of the above mentioned parameters, a detailed study to analyze their combined influence on the thermal resistance of the geothermal borehole, but also exploring this effect in other less researched areas, such as economic costs of running the exchanger and operating it (electricity consumption of the heat pump and associated pumping costs). / This research has received funding from the European Union’s Horizon 2020 Research and Innovation program under grant agreement No [657982], [727583] and [792355]. / Badenes Badenes, B. (2020). Optimización teórico-experimental de sondas de calor para intercambio geotérmico (SGE) según condiciones hidrogeológicas, características geométricas y propiedades de sus materiales [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/160477 / TESIS
|
| 275 |
"Evig liten tjej" : Kostymdesignyrkets genuskodning: En kritisk diskursanalys / "Perpetual little girl" : Gender coding of the costume design-profession: A critical discourse analysisS. Thil, Yonna January 2023 (has links)
“Perpetual little girl” – Gender coding of the costume design-profession: A critical discourse analysis is a bachelor’s thesis in Performance Studies written by Yonna S. Thil in the spring of 2023 at Stockholm University. This study focuses on the gendering of the costume design-profession, as well as the gendering of theatre professions in general and attempts to answer the question “How does female gender coding affect the professional role of the costume designer?”. Fashion history and theatre history is used to map out the ways in which the costume designer is at a point of intersection between fashion, a highly feminized phenomenon, and theatre, a system which has excluded women from the practice for thousands of years. Statistics from Stockholm University of the Arts and interviews with both male and female costume designers working in theatre and film in Sweden tell the story of how the feminization of their profession affect the practice. The study includes comparisons with male coded professions in the theatre system, questions of the wage gap between male and female coded professions as well as discussions of the artistic genius and charismatic authority.
|
| 276 |
The Life and Career of Fashion Designer, George StavropoulosBland, Kasey Dawn 02 September 2008 (has links)
No description available.
|
| 277 |
Made in Grønland : How can a designer facilitate the activation of a community in the face of top-down regeneration? / Tillverkad i Grønland : Hur kan en designer underlätta aktiveringen av en samfund i anseende av topstyrd nydaning?Miller, Rebecca January 2016 (has links)
Cities are highly unequal systems and rapid, top-down development is increasingly causing segregation between people of different socio-economic statuses through gentrification. In response, a bottom-up, more community centred approach is often proposed, yet this method also not without significant issues. In this thesis I investigate the role of the designer as a mediator, facilitator and translator between the top-down and bottom-up approaches to urban development. Using Grønland, Oslo as a case study, I start by gathering high-level research in order to understand the large-scale strategies that the municipality and private developers have for the area. In the second section, I undertake on-the-ground research in order to understand the everyday issues that people who live in, or use, the area face. In the final section I propose a research laboratory and makerspace that can activate the local community, providing the resources in order for everyday people to be able to have a positive impact on their city, in addition to gathering long-term, in-depth research on the area in order to influence the future of Grønland. This thesis is written as a working document that can, and should, be used by a wide range of people, from the municipality to local residents, and is designed to be added to as the project develops.
|
| 278 |
Labor lurking under the surface of glass : Discussion between the visible and invisibleStåhl, Rosita January 2023 (has links)
This text is about visibility and invisibility of work and labor through research from history and present time and through my own work, process and thinking. Through these topics I want to raise discussions and make comments in the field of craft and glass. To evoke our senses and feelings through video, sound and perception of the work and installations together with the properties of glass. To discuss that there are underlying layers of a work of glass that we see in a museum or gallery space. Why some information is visible, and some is lost by the presented state. Is the material and finished product that we see more important than the underlying layers and process? Can we change how we present and document our pieces with information better? Together with the labor of my interest, there is also about the loss of an industry and a personal loss of the time I had there coming to an end.
|
| 279 |
Property inference decision-making and decision switching of undergraduate engineers : implications for ideational diversity & fluency through movements in a Cartesian concept design spaceShah, Raza January 2017 (has links)
Design fixation is a phenomenon experienced by professional designers and engineering design students that stifles creativity and innovation through discouraging ideational productivity, fluency and diversity. During the design idea and concept generation phase of the design process, a reliance on perceptual surface feature similarities between design artefacts increases the likelihood of design fixation leading to design duplication. Psychologists, educators and designers have become increasingly interested in creative idea generation processes that encourage innovation and entrepreneurial outcomes. However, there is a notable lack of collaborative research between psychology, education and engineering design particularly on inductive reasoning of undergraduate engineering students in higher education. The data gathered and analysed for this study provides an insight into property inference decision-making preferences and decision switching (SWITCH) patterns of engineering undergraduates under similarity-based inductive judgements [SIM] and category-based inductive judgements [CAT]. For this psychology experiment, property induction tasks were devised using abstract shapes in a triad configuration. Participants (N = 180), on an undergraduate engineering programme in London, observed a triad of shapes with a target shape more similar-looking to one of two given shapes. Factors manipulated for this experiment included category alignment, category group, property type and target shape. Despite the cognitive development and maturation stage of undergraduate engineers (adults) in higher education, this study identified similarity-based inductive judgements [SIM] to play a significant role during inductive reasoning relative to the strength of category-based inductive judgements [CAT]. In addition to revealing the property inference decision-making preferences of a sample of undergraduate engineers (N = 180), two types of switch classification and two types of non-switch classification (SWITCH) were found and named SIM_NCC, SIM-Salient, Reverse_CAT and CAT_Switching. These different classifications for property inference switching and non-switching presented a more complex pattern of decision-making driven by the relative strength between similarity-based inductive judgements [SIM] and category-based inductive judgements [CAT]. The conditions that encouraged CAT_Switching is of particular interest to design because it corresponds to inference decision switching that affirms the sharing of properties between dissimilar-looking shapes designated as category members, i.e., in a conflicting category alignment condition (CoC). For CAT_Switching, this study found a significant interaction between a particular set of conditions that significantly increased the likelihood of property inference decisions switching to affirm the sharing of properties between dissimilar-looking shapes. Stimuli conditions that combined a conflicting category alignment condition (where dissimilar-looking shapes belong to the same category) with category specificity, a causal property and a target shape with merged (or blended) perceptual surface features significantly increased the likelihood of a property inference decision switching. CAT_Switching has important implications for greater ideational productivity, fluency and diversity to discourage design fixation within the conceptual design space. CAT_Switching conditions could encourage more creative design transformations with alternative design functions through inductive inferences that generalise between dissimilar artefact designs. The findings from this study led to proposing a Cartesian view of the concept design space to represent the possibilities for greater movements through flexible and expanding category boundaries to encourage conceptual combinations, greater ideational fluency and greater ideational diversity within a configuration design space. This study has also created a platform for further research into property inference decision-making, ideational diversity and category boundary flexibility under stimuli conditions that encourage designers and design students to make inductive generalisations between dissimilar domains of knowledge through a greater emphasis on causal relations and semantic networks.
|
| 280 |
Web applications using the Google Web Toolkit / Webanwendungen unter Verwendung des Google Web Toolkitsvon Wenckstern, Michael 04 June 2013 (has links) (PDF)
This diploma thesis describes how to create or convert traditional Java programs to desktop-like rich internet applications with the Google Web Toolkit.
The Google Web Toolkit is an open source development environment, which translates Java code to browser and device independent HTML and JavaScript.
Most of the GWT framework parts, including the Java to JavaScript compiler as well as important security issues of websites will be introduced.
The famous Agricola board game will be implemented in the Model-View-Presenter pattern to show that complex user interfaces can be created with the Google Web Toolkit.
The Google Web Toolkit framework will be compared with the JavaServer Faces one to find out which toolkit is the right one for the next web project. / Diese Diplomarbeit beschreibt die Erzeugung desktopähnlicher Anwendungen mit dem Google Web Toolkit und die Umwandlung klassischer Java-Programme in diese.
Das Google Web Toolkit ist eine Open-Source-Entwicklungsumgebung, die Java-Code in browserunabhängiges als auch in geräteübergreifendes HTML und JavaScript übersetzt.
Vorgestellt wird der Großteil des GWT Frameworks inklusive des Java zu JavaScript-Compilers sowie wichtige Sicherheitsaspekte von Internetseiten.
Um zu zeigen, dass auch komplizierte graphische Oberflächen mit dem Google Web Toolkit erzeugt werden können, wird das bekannte Brettspiel Agricola mittels Model-View-Presenter Designmuster implementiert.
Zur Ermittlung der richtigen Technologie für das nächste Webprojekt findet ein Vergleich zwischen dem Google Web Toolkit und JavaServer Faces statt.
|
Page generated in 0.0383 seconds