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Dissertations / Theses on the topic 'Direct light'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Lindemann, Florian, and Timo Ropinski. "Advanced Light Material Interaction for Direct Volume Rendering." University of Münster, Germany, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-92869.

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In this paper we present a heuristic approach for simulating advanced light material interactions in the context of interactive volume rendering. In contrast to previous work, we are able to incorporate complex material functions, which allow to simulate reflectance and scattering. We exploit a common representation of these material properties based on spherical harmonic basis functions, to combine the achieved reflectance and scattering effects with natural lighting conditions, i. e., incorporating colored area light sources. To achieve these goals, we introduce a modified SH projection tech

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2

Schroeder, Christopher. "Exploiting Collective Effects to Direct Light Absorption in Natural and Artificial Light-Harvesters." Thesis, University of Maryland, College Park, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10128741.

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<p>Photosynthesis—the conversion of sunlight to chemical energy—is fundamental for supporting life on our planet. Despite its importance, the physical principles that underpin the primary steps of photosynthesis, from photon absorption to electronic charge separation, remain to be understood in full. Electronic coherence within tightly-packed light-harvesting (LH) units or within individual reaction centers (RCs) has been recognized as an important ingredient for a complete understanding of the excitation energy transfer (EET) dynamics. However, the electronic coherence across unit

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3

Ellithi, Ali Yehia. "Studies in direct break up reactions." Thesis, University of Edinburgh, 1986. http://hdl.handle.net/1842/13797.

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4

Etienne, Caron. "Secondary cooling in the direct-chill casting of light metals." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5237.

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The Direct-Chill (DC) casting process is used in the non-ferrous metals industry to produce ingots, blooms and cylindrical billets. During DC casting, primary cooling in the mould is followed by secondary cooling, in which the cast product surface is directly cooled by water jets. The formation of defects during the direct-chill casting process can be reduced by controlling the heat extraction in the secondary cooling zone during the start-up phase. The control and optimization of this process requires an accurate knowledge of the boundary conditions and their relationship with casting paramet

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Varjo, S. (Sami). "A direct microlens array imaging system for microscopy." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526213828.

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Abstract This work presents the development of a new optical imaging system. Previous objections have claimed that it is easier to build a single good quality field lens than a large number of good microlenses and it is therefore better to use a field objective. The possible benefits from a field lens are here traded for a more compact and cost-efficient design that would be suitable for field diagnostics. The new imaging setup described in this work is based on a microlens array capable of capturing light field data and no other refractive optics are used. Hundreds of lenses with a diameter r

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Correa, Poblete Noemi Patricia. "Laser scanning confocal microscope with direct wavefront sensing of volumetric backscattered light." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/44541.

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Fluorescent labelling combined with confocal microscopy is a powerful tool employed in several laboratories around the world. This is based in the ability to image well only detail that arises from the region of the specimen close to the focal plane. In confocal microscopes, a pinhole situated in front of the detector leads to optical sectioning, at the cost of rejecting some signal photons together with the out-of-focus ones. The problem in this case is that photons generated in the focal volume are susceptible to scattering, changing their direction and not passing through the pinhole, thus

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Butaney, Vikas Hari. "Measurements, analysis and modeling of the performance of direct detection receivers with an optical preamplifier." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-11102009-020152/.

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8

Brodersen, Craig. "The Absorption and Utilization of Direct, Diffuse and Low Angle Light by Plant Leaves." ScholarWorks @ UVM, 2008. http://scholarworks.uvm.edu/graddis/31.

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The light environment of plants is extremely complex and questions relating to how direct, diffuse, or low-angle light affect plants at the leaf-level have remained largely unanswered. Global-change scenarios suggest a trend of increasing diffuse light due to expected increases in cloud cover and atmospheric water vapor concentrations. Here we present three different examples where changes in the directional quality of light affect leaf-level processes. First, some understory plants have well-developed lens-shaped epidermal cells, which have been shown to focus collimated light, but thei

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9

Currie, Thayne, Olivier Guyon, Motohide Tamura, et al. "Subaru/SCExAO First-light Direct Imaging of a Young Debris Disk around HD 36546." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/624379.

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We present H-band scattered light imaging of a bright debris disk around the A0 star HD 36546 obtained from the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system with data recorded by the HiCIAO camera using the vector vortex coronagraph. SCExAO traces the disk from r similar to 0."3 to r similar to 1" (34-114 au). The disk is oriented in a near east-west direction (PA similar to 75 degrees), is inclined by i similar to 70 degrees-75 degrees, and is strongly forward-scattering (g > 0.5). It is an extended disk rather than a sharp ring; a second, diffuse dust population extends from

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Ambardekar, Aditya. "Analysis of BER in optical direct detection DPSK system in the presence of SPM and chromatic dispersion." abstract and full text PDF (UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1460745.

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11

Leitner, Olivier Michel André. "Direct CP violation in B decays including \rho - \omega mixing and covariant light-front dynamics." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2003. http://tel.archives-ouvertes.fr/tel-00003690.

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12

Leitner, Olivier. "Direct CP violation in Beta decays including rho-omega mixing and covariant light-front dynamics." Clermont-Ferrand 2, 2003. http://www.theses.fr/2003CLF22430.

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L'étude présentée dans cette thèse est divisée en trois parties. Premièrement, la violation directe de CP est étudiée dans les réactions suivantes : B-+,0->rho zéro(omega)M+-,0 ou M+-,0 où M+-,0 représente soit un pion soit un kaon. En confrontant les données expérimentales et les résultats théoriques des rapports de branchements, il est alors possible de contraindre les incertitudes théoriques liées aux facteurs de forme, aux éléments rho et n de la matrice Cabibbo-Kobayashi-Maskawa (CKM) et au nombre de couleur effectif, Nceff. Puis, afin de réduire les incertitudes sur les facteurs de forme

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13

Vaccari, Alessandro. "Modeling the interaction of light with photonic structures by direct numerical solution of Maxwell's equations." Doctoral thesis, University of Trento, 2015. http://eprints-phd.biblio.unitn.it/1415/1/Tesi_dottorato_Vaccari_Alessandro.pdf.

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The present work analyzes and describes a method for the direct numerical solution of the Maxwell's equations of classical electromagnetism. This is the FDTD (Finite-Difference Time-Domain) method, along with its implementation in an "in-house" computing code for large parallelized simulations. Both are then applied to the modelization of photonic and plasmonic structures interacting with light. These systems are often too complex, either geometrically and materially, in order to be mathematically tractable and an exact analytic solution in closed form, or as a series expansion, cannot be obta

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Capers, Robbin G. "Foraging Decisions of Nocturnal Mice Under Direct and Indirect Cues of Predation Risk." Scholar Commons, 2010. https://scholarcommons.usf.edu/etd/1589.

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The perception of increased predation risk by nocturnal mice and other small mammals has been shown to reduce activity levels, particularly in foraging effort. Various cues of predation risk have been used in previous studies, but few have assessed the potential interactions between different types of cues. I conducted field, laboratory, and enclosure experiments using predator scents, artificial light, and microhabitat variables to determine the effects of direct and indirect cues of predation risk on foraging behavior in wild nocturnal mice. Experimental foraging trays served as artificial r

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15

Brügmann, Tobias [Verfasser]. "Optogenetics in striated muscle: defibrillation of the heart and direct stimulation of skeletal muscles with light / Tobias Brügmann." Bonn : Universitäts- und Landesbibliothek Bonn, 2019. http://d-nb.info/1201727839/34.

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16

Dyck, Tobias [Verfasser], Uwe [Akademischer Betreuer] Rau, and Andres Fabian [Akademischer Betreuer] Lasagni. "Light trapping by light treatment : direct laser interference patterning for the texturing of front contacts in thin-film silicon solar cells / Tobias Dyck ; Uwe Rau, Andres Fabian Lasagni." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://nbn-resolving.de/urn:nbn:de:101:1-2018071608004058241947.

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Dyck, Tobias Verfasser], Uwe [Akademischer Betreuer] [Rau, and Andres Fabian [Akademischer Betreuer] Lasagni. "Light trapping by light treatment : direct laser interference patterning for the texturing of front contacts in thin-film silicon solar cells / Tobias Dyck ; Uwe Rau, Andres Fabian Lasagni." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1162845805/34.

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18

Collier, Anthony Richard. "Profiling the organic emissions from a light-duty direct injection diesel engine over a range of speeds and loads." Thesis, University of Plymouth, 1995. http://hdl.handle.net/10026.1/2214.

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Diesel engines account for a large percentage of the particulates in urban city environments. Polycyclic aromatic compounds (PAC), some proven carcinogens, have been found on diesel particulates. The trace level nitro-PAC emissions, such as 1-nitropyrene and dinitropyrenes, contribute a large proportion of the mutagenicity in the particulates; in the case of 1-nitropyrene between 10 to 40% of the total mutagenicity of the particulate has been claimed. The potential health hazards of PAC require the levels and sources of such emissions to be evaluated over a range of speeds and loads. PAC emiss

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19

Chen, Jenny X. "Hearing the Light: A Behavioral and Neurophysiological Comparison of Two Optogenetic Strategies for Direct Excitation of Central Auditory Pathways." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:27007736.

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For deaf individuals with absent/damaged cochleae or auditory nerves, the auditory brainstem implant (ABI) is the only option to restore hearing. However, most ABI users have only sound awareness without meaningful speech comprehension. These electrical implants are limited by crosstalk between neighboring electrodes that indiscriminately activates large groups of neurons. In contrast, optogenetics provides a means to manipulate neural circuits with temporal and spatial precision by using light to activate genetically modified neurons expressing light-gated ion channels called channelrhodopsin

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20

Hubbard, Jeffrey. "The melanopsin-dependent direct non-circadian effects of light : a third principal mechanism for the regulation of sleep and wake." Thesis, Strasbourg, 2012. http://www.theses.fr/2012STRAJ094/document.

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Entre 15 et 30% de la population souffrent de troubles du sommeil, ce qui représente un enjeu majeur de santé publique et souligne la nécessité de mieux comprendre les mécanismes de régulation du sommeil. La régulation du sommeil est décrite comme un modèle à 2-processus comprenant un mécanisme circadien et homéostatique. La lumière exerce un effet sur le sommeil de deux manières distinctes: indirectement en resynchronisant l'horloge, et directement par des mécanismes qui restent mal compris. Cet effet direct est médié par des cellules spécialisées de la rétine intrinsèquement photosensibles e

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21

Mennesson, Bertrand, Denis Defrère, Matthias Nowak, et al. "Making high-accuracy null depth measurements for the LBTI exozodi survey." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622531.

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The characterization of exozodiacal light emission is both important for the understanding of planetary systems evolution and for the preparation of future space missions aiming to characterize low mass planets in the habitable zone of nearby main sequence stars. The Large Binocular Telescope Interferometer (LBTI) exozodi survey aims at providing a ten-fold improvement over current state of the art, measuring dust emission levels down to a typical accuracy of similar to 12 zodis per star, for a representative ensemble of similar to 30+ high priority targets. Such measurements promise to yield

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22

Dautaj, Ylli. "Legislative Reforms to Encourage, Promote, Protect and Attract Foreign Direct Investments in Kosovo : Legislative Reforms in the Light of Kosovo’s EU Integration Process." Thesis, Örebro universitet, Institutionen för juridik, psykologi och socialt arbete, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-43725.

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23

WANG, ZHAOMIN. "Measurements of Cosmic Ray Proton + Helium flux with the DAMPE experiment." Doctoral thesis, Gran Sasso Science Institute, 2020. http://hdl.handle.net/20.500.12571/9942.

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This thesis concentrates on the measurement of cosmic-ray light component (proton + helium) spectrum with the Dark Matter Particle Explorer (DAMPE). In chapter one, an introduction on cosmic-ray history is given together with the acceleration mechanism and some recent experiments. A description on DAMPE system is presented in chapter two, which includes its sub-detectors, scientific targets and parameters. There are various challenges in measuring cosmic ray energy with a limited-size calorimeter (like the BGO of DAMPE). In chapter three, various unfolding methods for reconstructing the primar

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Lindh, E. Mattias. "Bilayer Light-Emitting Electrochemical Cells for Signage and Lighting Applications." Licentiate thesis, Umeå universitet, Institutionen för fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-114500.

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Artificial light surrounds us in a manifold of shapes. It is mainly utilized for illumination, but also for graphical communication of complex and evolving messages and information, among other things. It can be generated in different ways with incandescent lamps and fluorescent tubes constituting two common examples. Organic solid state light-generation technologies, which boast advantages such as solution processability, thin and flexible form factors, and large versatility, are modern additions to the field. But regardless of the means of generation, whenever light is to be used to communic

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Zeller, Niclas [Verfasser], Uwe [Akademischer Betreuer] Stilla, Franz [Gutachter] Quint, Daniel [Gutachter] Cremers, and Uwe [Gutachter] Stilla. "Direct Plenoptic Odometry - Robust Tracking and Mapping with a Light Field Camera / Niclas Zeller ; Gutachter: Franz Quint, Daniel Cremers, Uwe Stilla ; Betreuer: Uwe Stilla." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1171988001/34.

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26

Wade, Tom H. "Circulation of the Light: Mandalas, Alchemy, and Non-Linear Cinema." Ohio University Honors Tutorial College / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ouhonors149441657291478.

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27

Micó, Reche Carlos. "DEVELOPMENT OF MEASUREMENT AND VISUALIZATION TECHNIQUES FOR CHARACTERIZATION OF MIXING AND COMBUSTION PROCESSES WITH SURROGATE FUELS." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/58991.

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[EN] The development and optimization of new combustion modes is nowadays an important research field, to reduce the pollutant emissions of the reciprocating internal combustion engines. Their development requires the use of a wide variety of experimental and theoretical tools, which make it possible to know and understand their fundamentals. In this context the main objective of this Thesis is framed: the development and optimization of measuring and visualization techniques, to reach the level of accuracy and detail required for current and future studies of that kind. The work has been ba

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Ha, Min Seok. "Thermal analysis of high power led arrays." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31803.

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Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Samuel Graham; Committee Member: J. Rhett Mayor; Committee Member: Yogendra Joshi. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Calvel, Laurent. "L’influence des effets directs, non circadiens de la lumière et de la phototransduction mélanopsinergique sur l’humeur, la veille et le sommeil." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAJ039/document.

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Les troubles du sommeil et la dépression ont une interaction fonctionnelle et constituent un enjeu majeur de santé publique. La lumière influence la physiologie, le comportement, en particulier la locomotion, le sommeil et l’humeur, via des effets, circadiens (entrainement de l’horloge) et directs,non-circadiens. L’objectif de ce travail a été de caractériser les effets directs, non circadiens de la lumière sur les comportements, et d’évaluer le rôle des différents photorécepteurs impliqués. Des souris « melanopsin knockout » ont été exposées à différents niveaux de luminance (<10 lux, 150

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Westergren, Amanda, and Tim Kammeborn. "Vänster- eller högerriktat ljus i reklamfilm, finns det en preferens? : En experimentell studie om ljussättningens laterala riktning i reklamfilm." Thesis, Högskolan Dalarna, Bildproduktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:du-30568.

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In accordance with an experimental setup this thesis investigates to what extent the participants' attitudes and aesthetic preferences are influenced by the lateral direction of light in moving image sequences. It is also investigated whether the participants' handedness correlates with their advertising evaluation. The purpose of the study is to generate new knowledge of potential biases in moving images that could be applied by image producers to create more compelling commercials. Our work is based on a transdisciplinary theoretical approach and the results are analyzed based on biopsycholo

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Taylor, Rebecca Lynn. "Studies in Fe bioavailability : co-limitation of primary productivity by iron, light, and nitrate in the Beaufort Sea, and direct iron-siderophore uptake mechanisms in Fe deficient phytoplankton." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/39285.

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This study explores two relevant questions in the realm of iron (Fe) bioavailability to phytoplankton. First, does Fe availability limit (or co-limit) growth of indigenous plankton communities in the Arctic Ocean? Second, can phytoplankton internalize ferrated siderophores with a non-reductive uptake mechanism? To address the first question, an 8-day grow out experiment was conducted in the Beaufort Sea in early September 2009, during which light, Fe, and nitrate (NO₃⁻) levels were manipulated. Bottles were sampled on days 0, 2, 4, 6, and 8 for accessory pigments, size-fractionated chlorophyll

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Cao, Jing. "Creation and orientation of nano-crystals by femtosecond laser light for controlling optical non-linear response in silica-based glasses." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS055/document.

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En raison d’un désordre aléatoire à longue distance, un verre présente une symétrie d'inversion telle que la génération de seconde harmonique (GSH) est interdite. Cependant, par irradiation avec un laser femtoseconde (fs) très focalisé, il est possible de précipiter des cristaux optiquement non linéaires, et de rompre la symétrie d'inversion et donc d'induire une GSH. De plus, ceci peut être réalisé localement en trois dimensions. Pour la démonstration, on a appliqué, dans le système vitreux Li₂O-Nb₂O₅-SiO₂ le mode opératoire décrit ci-dessous qui permet la formation de cristaux de LiNbO₃, hau

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33

Klinkenberg, Joy. "Stability analysis of channel flow laden with small particles." Licentiate thesis, KTH, Stabilitet, Transition, Kontroll, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-42271.

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This thesis deals with the stability of particle laden flows. Both modal and non-modal linear analyses have been performed on two-way coupled particleladen flows, where particles are considered spherical, solid and either heavy or light. When heavy particles are considered, only Stokes drag is used as interaction term. Light particles cannot be modeled with Stokes drag alone, therefore added mass and fluid acceleration are used as additional interaction forces. The modal analysis investigates the asymptotic behavior of disturbances on a base flow, in this thesis a pressure-driven plane channel

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Oliveira, Leonardo da Silva. "Aspectos entomológicos em povoamentos homogêneos de Acacia mearnsii de Wild." Universidade Federal de Santa Maria, 2007. http://repositorio.ufsm.br/handle/1/3705.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The proposed work aimed to investigate the entomological aspects in homogeneous stands of Acacia mearnsii (black wattle). It was considered: insects identification and damage quantification on seeds; treatment effect of seeds and the insecticides application on the aerial part of plants of direct sowing; the survey qualiquantitative by light traps mean; the main species of Coleoptera present in the suppressed trees; the attack characterization of Oncideres impluviata and its influence on wood volume of black wattle. The experimen

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Gohri, Vipul. "Development of top-emission Organic Light-Emitting Diodes for High luminance monochrome and full-colour microdisplay applications." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT070/document.

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La travail présente traite du développement de diodes organiques électroluminescentes(OLEDs) a haute luminance pour des applications dans des micro écrans. Ces dispositifs sontbases sur des substrats silicium utilisent la technologie CMOS. Le présent ouvrage met en avantles efforts développe afin de réduire la dérive en tension et ma décroissance lumineuse enopération des dispositifs lumineux.Dans la première partie de l’étude, des OLEDs vertes haute luminance fonctionnant àbasse tension sont développes. L’empilement organique a émission vers le haut comprenant unémetteur fluorescent vert entr

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Kesawan, Sivakumar. "Fire performance and design of light gauge steel frame wall systems made of hollow flange sections." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/120153/1/Kesawan_Sivakumar_Thesis.pdf.

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Load bearing Light Gauge Steel Frame (LSF) wall system is a cold-formed steel structure made of cold-formed steel studs and lined on both sides by gypsum plasterboards. In recent times its use and demand in the building industry has significantly increased due to their advantages such as light weight, acoustic performance, aesthetic quality of finished wall, ease of fabrication and rapid constructability. Fire Resistant Rating (FRR) of these walls is given more attention due to the increasing number and severity of fire related accidents in residential buildings that have caused significant lo

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Hekrlová, Kateřina. "Mikroskop pro vzájemné sesazování optických vláken." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444979.

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The demountable splicing of optical fibres uses different types of connectors which ensures accurate position of connected fibres. If the optical fibres are aligned in free space, a view from two perpendicular viewing directions is necessary for a maximum aligning accuracy. The method of direct monitoring of optical fibres provides this possibility however, it is necessary to use two imaging systems. This problem can be solved by a special microscope, which is designed in this thesis. The microscope can visualize the alignment of optical fibres from two mutually perpendicular directions by mov

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Vezzosi, Riccardo. "State of the art and critical review of pre-chamber ignition systems for passenger car spark ignition engines." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22702/.

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Pre-chamber ignition systems are currently one of the most attractive developments for SI engines. The objective of this thesis is to present the technology at it's current state, focusing on passenger vehicles application, to analyse what issues need to be addressed for it to widely come to the market and what the potential of this techology is for the SI engine future. Replacing the spark plug with a new system capable of igniting a much leaner mixture, to reduce the likelyhood of knock, was the initial goal of the pre-chamber ignition system. What the system achieves is also a much faster

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Elsner, Claudia. "An Embodied Account of Action Prediction." Doctoral thesis, Uppsala universitet, Institutionen för psykologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-236868.

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Being able to generate predictions about what is going to happen next while observing other people’s actions plays a crucial role in our daily lives. Different theoretical explanations for the underlying processes of humans’ action prediction abilities have been suggested. Whereas an embodied account posits that predictive gaze relies on embodied simulations in the observer’s motor system, other accounts do not assume a causal role of the motor system for action prediction. The general aim of this thesis was to augment current knowledge about the functional mechanisms behind humans’ action pre

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Ciemniak, Christian [Verfasser], Franz von [Akademischer Betreuer] Feilitzsch, Andreas [Akademischer Betreuer] Ulrich, and Feilitzsch Franz [Akademischer Betreuer] von. "Setup of a Neutron Scattering Facility for the Measurement of Scintillation Light Quenching Factors of Low-Temperature Detectors Used in the Direct Dark Matter Search Experiments CRESST and EURECA / Christian Ciemniak. Gutachter: Franz von Feilitzsch ; Andreas Ulrich. Betreuer: Franz von Feilitzsch." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1015804705/34.

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Sauers, Daniel J. "Light directed gene patterning using photocaged doxycycline /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 196 p, 2010. http://proquest.umi.com/pqdweb?did=1993328811&sid=6&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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42

Ruppert, Elisabeth. "Influence non-circadienne de la lumière sur les comportements : identification des structures impliquées et application clinique." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAJ102/document.

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La lumière influence fortement la physiologie et le comportement en exerçant des effets non-visuels de deux types : i) indirects, via la resynchronisation de l’horloge centrale qui est située dans les noyaux suprachiasmatiques (NSC), ii) directs, indépendants du processus circadien, via des mécanismes encore mal compris. Nos travaux chez la souris ont montré que l’influence directe de la lumière constitue un mécanisme majeur de régulation du sommeil, de l’éveil et de l’humeur, au même titre que le processus circadien. Ces effets sont majoritairement médiés par la mélanopsine, un photopigment e

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Ligmajer, Jiří. "Hierarchické techniky pro výpočet osvětlení." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236472.

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This master thesis deals with description of hierarchical techniques in global lighting computation. Here is explaining the importance of hierarchical techniques in lighting computation and shows method, how to use these hierarchical techniques in realtime radiosity and its extension to dynamic area lighting. These two techniques are described in detail in the first part of this project. In the other part is desing and implementation of application for dynamic area lighting computation.

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Borodinova, Baiba. "Inner yard building occupant’s perception versus the computer simulated metrics of daylight : Field study and simulation-based analysis of inner yard building." Thesis, KTH, Ljusdesign, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233840.

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This Master thesis was aimed at investigating common daylight evaluation methods related to Swedish building codes versus human perception of daylight in residential spaces. Field (interview) and simulation-based study were conducted in one of the typical 20thcentury residential, closed courtyard buildings in Stockholm. 12 residents of Kv. Väktaren 16 were interviewed and simulation models were prepared for the apartments occupied by the participants. Resident perception of light was mostly contrary to daylight assessing values and methods of daylight factor – DF in a point (CIE overcast s

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Schebetta, Dennis Christian. "From Darkness to Light: Examining the Role of Playwright/Director on Obscura." VCU Scholars Compass, 2006. http://scholarscompass.vcu.edu/etd/1428.

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The aim and scope of my thesis is to examine the process of playwrights directing their own work, using the production of my play Obscura as an example of personal research, as well as examples of other dramatists. I will examine the advantages and disadvantages that playwrights face when directing their own work. I will compare several methods to my own production of Obscura. I wrote the play in the Spring of 2005 which culminated in a reading in April, followed by a workshop production in the Fall of 2005 in the Newdick Theater at Shafer Street Playhouse.

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J'lali, Yousra. "DirectX 12: Performance Comparison Between Single- and Multithreaded Rendering when Culling Multiple Lights." Thesis, Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20201.

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Background. As newer computers are constructed, more advanced and powerful hardware come along with them. This leads to the enhancement of various program attributes and features by corporations to get ahold of the hardware, hence, improving performance. A relatively new API which serves to facilitate such logic, is Microsoft DirectX 12. There are numerous opinions about this specific API, and to get a slightly better understanding of its capabilities with hardware utilization, this research puts it under some tests. Objectives. This article’s aim is to steadily perform tests and comparisons i

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Kjellsson, Lindblom Tor. "Relativistic light-matter interaction." Doctoral thesis, Stockholms universitet, Fysikum, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-147749.

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During the past decades, the development of laser technology has produced pulses with increasingly higher peak intensities. These can now be made such that their strength rivals, and even exceeds, the atomic potential at the typical distance of an electron from the nucleus. To understand the induced dynamics, one can not rely on perturbative methods and must instead try to get as close to the full machinery of quantum mechanics as practically possible. With increasing field strength, many exotic interactions such as magnetic, relativistic and higher order electric effects may start to play a s

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Ghorbani, Ghomeshi Ramin. "Pair Production and the Light-Front Vacuum." Thesis, Umeå universitet, Institutionen för fysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-83444.

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Dominated by Heisenberg's uncertainty principle, vacuum is not quantum mechanically an empty void, i.e. virtual pairs of particles appear and disappear persistently. This nonlinearity subsequently provokes a number of phenomena which can only be practically observed by going to a high-intensity regime. Pair production beyond the so-called Sauter-Schwinger limit, which is roughly the field intensity threshold for pairs to show up copiously, is such a nonlinear vacuum phenomenon. From the viewpoint of Dirac's front form of Hamiltonian dynamics, however, vacuum turns out to be trivial. This trivi

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Vo, Hao T. H., and Hao T. H. Vo. "Transformation of Trace Organic Contaminants Involving Reactive Oxygen Species Driven By Solar Lights." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/626333.

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The presence of trace organic compounds (TOrCs) in wastewater effluent and surface waters has raised attention due to their health and environmental effects. Some TOrCs are naturally attenuated via biodegradation, photo-degradation and/or adsorption, but some persist in the environment as contaminants in surface and ground waters. Thus, it is crucially important to understand their transformation pathways and their mechanisms following their discharge into the environment. This work presents research in three parts: • The first part represents an investigation of photo-transfo

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Touraton, Marie-Léonor. "Epitaxie directe de semiconducteurs III-V sur substrat de silicium pour dispositifs photoniques." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT010.

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De par la demande croissante de performance en termes de transmission de données, la photonique sur silicium est devenue un nouveau paradigme. Cependant, d’autres domainesd’applications, comme la biophotonique et les systèmes autonomes de conduite pour n’enciter que deux profitent de cette approche. Afin de répondre à cette demande de circuits àinterconnexions optiques intégrées ce travail de thèse montre la possibilité d’intégrer unesource optique directement sur une plateforme silicium. Les briques technologiques rendantpossible l’intégration de sources lumineuses, émettant du rouge à la ban

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