- 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 31 to 37 of 37 (0.018 seconds)| 31 |
Kinematical Conservation Laws And Propagation Of Nonlinear Waves In Three DimensionsArun, K R 05 1900 (has links) (PDF)
No description available.
|
| 32 |
System response times in a simulated driving task : effects on performance, visual attention, subjective state and time estimationBauer, Tanja 02 1900 (has links)
The utilisation of navigation systems in cars has given rise to road safety concerns, and the design and functionality of such systems must therefore be adjusted to the users’ needs, since they have to divide their attention between driving and the operation of the navigation system. The study was aimed at finding the optimum system response time (SRT) which would enable a driver to focus as much as possible on the road while attaining an efficient task completion time using an electronic navigational system. The research project consists of two separate experiments and was completed by 10 subjects. Experiment 1 included a temporal reproduction task and a secondary memory task. The subjects had to memorise two symbols and then reproduce six time spans ranging from 1 to 30 s to provide a baseline measurement of their time estimation abilities. Experiment 2 consisted of a simulated automobile driving task. While driving in the simulator the subjects completed a memorising task displayed on a touch screen. The task was presented with seven different system response times (SRTs) ranging from 0 to 30 s. The effects of different SRTs on the eye movement from road to monitor, regarding the duration of fixation and the frequency of change were evaluated. The distribution of gazes to the secondary task was analysed to provide information about the time estimation performance in the driving simulator. Other dependent variables tested were the accuracy of selected items, memory game performance, drive performance and the subjective state of the test person. The results of this study can be employed to find the optimum duration of inter-task delays for in-vehicle technical devices. / Psychology / M.A. (Psychology)
|
| 33 |
Vizualizace plánování cesty pro neholonomní objekty / Visualisation of Path-Planning for Nonholonomic ObjectsOhnheiser, Jan January 2013 (has links)
This work deals with the path finding for nonholonomic robots using probabilistic algorithms. The theoretical part analyzes the general problem of finding routes. Subsequently, the work will focus on probabilistic algorithms. The practical part describes design of the applet and web sites that demonstrate probabilistic algorithms to user-specified objects.
|
| 34 |
Oral Proficiency Assessment of French Using an Elicited Imitation Test and Automatic Speech RecognitionMillard, Benjamin J. 27 June 2011 (has links) (PDF)
Testing oral proficiency is an important, but often neglected part of the foreign language classroom. Currently accepted methods in testing oral proficiency are timely and expensive. Some work has been done to test and implement new assessment methods, but have focused primarily on English or Spanish (Graham et al. 2008). In this thesis, I demonstrate that the processes established for English and Spanish elicited imitation (EI) testing are relevant to French EI testing. First, I document the development, implementation and evaluation of an EI test to assess French oral proficiency. I also detail the incorporation of the use of automatic speech recognition to score French EI items. Last, I substantiate with statistical analyses that carefully engineered, automatically scored French EI items correlate to a high degree with French OPI scores.
|
| 35 |
Saw Reflective Transducers And Antennas For Orthogonal Frequency Coded Saw SensorsSantos, Bianca Maria 01 January 2009 (has links)
Passive sensors that vary its impedance per measured parameter may be used with surface acoustic wave (SAW) reflective transducers (SRT) for wireless acquisition of the measurand. The device is composed of two transducers, where one, which may be attached to an antenna, is used to launch the wave within the device substrate, and the other is where the sensor load is attached to. The latter is able to reflect the incident wave. How much power is reflected is determined by the attached sensor load. Amplitude variations as well as peak frequency variations of the SRT reflectivity response are explored in this thesis. SAW passive temperature sensors with an orthogonal frequency coded (OFC) time response were previously investigated and prove to be ideal for use in harsh environments. Each sensor is distinguishable from the other due to the OFC code embedded within its time response. However, this coding technique poses a difficulty in designing antennas for the sensor due to its inherently wide bandwidth, and capacitive, non-uniform input impedance. This work covers antenna design and testing for the 250MHz wireless temperature acquisition prototype with a 28% fractional bandwidth, and for the 912MHz system which has 10% fractional bandwidth. Apart from the tag, antennas for the transmitter and receiver were designed for 50 Ohm matching with the required bandwidth maintained. Wireless temperature acquisition runs for the 250MHz prototype were successfully performed and show good agreement with measurements made by a thermocouple. Since a transceiver for the 912MHz system is not complete, the performance of the antennas was gauged by observing the signal transmitted wirelessly by the SAW tag and by comparing this with the sensor time response measured directly by a vector network analyzer.
|
| 36 |
Grönstrukturens funktion och betydelse för studenternas återhämtning (under covid-19 restriktioner) / Green structure's function and importance for students' recovery (during Covid-19 restrictions)Ahmad, Doaa January 2020 (has links)
Tidigare forskning har visat att exponering för grön miljö tillhandahåller hälsofördelar. Dessa fördelar indikerar bland annat återhämtningseffekt av stress, trötthet och uppmärksamhetsutmattning, vilket är särskilt viktigt för universitetsstudenter. Därför syftade denna studie att undersöka om det finns en koppling mellan universitetsstudenters kontakt med grönstruktur i/nära studiemiljö och studenternas upplevelse av sin studiemiljö under covid-19 restriktionerna. Detta med hjälp av en dagbokundersökning som förstudie och telefonintervjuer. Analysverktyget bestod av teoretiska ramverk, Attention Restoration Theory (ART) och Stress Reduktion Theory (SRT). Resultat och analys har bekräftat Attention Restoration Theory (ART), där det uppges att gröna naturliga miljöer ger återhämtningseffekt och väcker uppmärksamhet efter en mental trötthet. Därtill bekräftade den även Stress Recovery Theory (SRT), där det uppges att gröna naturliga miljöer ger positiva effekt på stressminskning, -bearbetning och -återhämtning. Slutsatsen till denna undersökning är att grönstruktur har en stor betydelse för universitetsstudenterna, detta då alla väljer att vistas eller komma i kontakt med gröna naturen på ett eller annat sätt, till exempel gå en promenad i naturen eller åka till en stuga i skogen. Att naturen är en del av studenternas vardag verkar vara framför allt en omedveten upplevelse för de flesta och sker utan erkännande eller bearbetning av miljön. Dock framkommer det att processen kan vara medveten för vissa studenter. / Previous research has shown that exposure to the green environment provides health benefits. These benefits indicate among other things, recovery effect of stress, fatigue and attention-exhaustion, which is especially important for university students. Therefore, this study aimed to investigate whether there is a connection between university students' contact with the green structure in / near the study-environment and the students' experience of their study environment during the covid-19 restrictions. This with the help of a diary-survey as a pilot-study and telephone interviews. The analysis tool consisted of theoretical frameworks, Attention Restoration Theory (ART) and Stress Reduction Theory (SRT). Results and analysis have confirmed Attention Restoration Theory (ART), where it states that green natural environments have a recovery effect and attracts attention after a mental fatigue. In addition, it also confirmed the Stress Recovery Theory (SRT), which states that green natural environments have a positive effect on stress reduction, processing and recovery. The conclusion of this study is that green structure is of great importance to university students, as everyone chooses to reside or get in touch with green nature in one way or another, for example going for a walk in a green environment or staying in a cottage in the forest. That nature is a part of the students' everyday life seems to be above all an unconscious experience for most and takes place without recognition or processing of the environment. However, it appears that the process may be conscious for some students.
|
| 37 |
A RESSIGNIFICAÇÃO DA LINGUAGEM NA RELAÇÃO MULTIPROFISSIONAL DA SAÚDE: relatos pessoais de mulheres com câncer de mamaCarvalho, Vanderli Duarte de 28 June 2011 (has links)
Made available in DSpace on 2016-08-03T12:29:27Z (GMT). No. of bitstreams: 1
Vanderli Duarte de Carvalho 1_194.pdf: 2604830 bytes, checksum: 6aae3c2066d9140325e0e1a05861f79c (MD5)
Previous issue date: 2011-06-28 / A questão relacional na área da saúde envolve o imaginário sociocultural. Nos casos de
mulheres com câncer de mama, denota um caráter emergencial em virtude do elevado número
de ocorrências ou pela falta de percepção feminina da doença, o que dificulta a prevenção e o
tratamento em tempo hábil. Este estudo pretende analisar como e de que maneira ocorrem e
repercutem as práticas discursivas entre os profissionais da saúde e as pacientes com câncer
de mama. Para isso, delineamos como pressupostos teóricos as barreiras da comunicação, seja
interpessoal, intrapessoal e não verbal. A metodologia foi com base na Teoria das
Representações Sociais de Serge Moscovici e no Discurso do Sujeito Coletivo (DSC) de Ana
Maria Cavalcanti Lefévre e Fernando Lefévre. Nas análises dos relatos das mulheres com
câncer de mama, identificamos conflitos de ordem sociocultural, como crenças, valores
pessoais, estereótipos, enfim, distorções provenientes do senso comum e do imaginário
coletivo, disseminadas nas representações da doença levadas a público pela mídia em geral.
Nas considerações finais, constatamos que tais representações (estigmas sociais) interferem na
relação com os profissionais de saúde, influenciando, assim, a adesão ao tratamento da
doença. Os aspectos comunicacionais são aqui apontados de maneira tácita.
|
Page generated in 0.026 seconds