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Dissertations / Theses on the topic 'Dark Adaptation'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Nguyen, Tam M. "Vergence registration in the dark /." Adobe Acrobat Reader required to view document, 2007. http://library.neco.edu/theses/NguyenThesisDec07.pdf.

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2

Bensaid, Nicolas. "Modelling and data analysis for fundus reflectometry and dark adaptation." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/modelling-and-data-analysis-for-fundus-reflectometry-and-dark-adaptation(8ba8e734-3edc-4bd1-acfd-bfc0a1a542f1).html.

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Retinal diseases such as age-related macular degeneration (AMD) are the major cause of blindness in the developed world. Early diagnosis of these diseases is difficult as symptoms appear only at advanced stages. Nevertheless, several studies suggest that impairment of dark adaptation (the ability of the retina to adapt to low lighting) is a cue to AMD. Dark adaptation is the result of the regeneration of light sensitive pigments after having reacted to light (bleaching). This PhD aims at developing a tool for objective measurements of the quantity of photopigment and the kinetics of dark adapt

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3

Rodrigo, Diaz de Cerio Elena. "Mechanisms of dark adaptation and their link with early age related macular degeneration." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/mechanisms-of-dark-adaptation-and-their-link-with-early-age-related-macular-degeneration(37dc295a-3a3a-4b18-9075-d0df9a74a648).html.

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Age-related macular degeneration (AMD) is the major cause of blindness in older people in developed countries. Although the early stages of the disease are thought to be symptomless, it is known that rod function systematically deteriorates as the disease progresses. The rod-mediated sensitivity recovery, called dark adaptation (DA), is abnormal in early AMD and it is clear this alteration precedes changes in visual function such as visual acuity (VA). In fact by the time VA is abnormal in AMD, many millions of rods will have been lost. DA has not been extensively studied in clinics due to the

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4

Pickrell, Lydia Mary. "The Effect of Dark Adaptation on Red and Blue Light-Driven Pupil Responses." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586380901812279.

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5

Bradley, Larry D. "Pressure and temperature effects on bacteriorhodopsin light to dark adaptation studied by near-infrared raman spectroscopy." Honors in the Major Thesis, University of Central Florida, 1994. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/123.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Arts and Sciences<br>Physics

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6

Pant, Mukund. "Light adaptation of melanopsin photoreception and its interaction with cone signalling." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/227063/1/Mukund%20Pant%20Thesis.pdf.

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Light adaptation optimises visual responses to illumination changes. Although it is well established that adaptation is faster for cone than rod photopigments, these dynamics are unknown for melanopsin photopigments in human eyes. This thesis reports the development of a novel method for characterising the melanopsin photobleach regeneration characteristic and its effect on the cone-driven pupil light reflex. Compared to cone-opsins, the melanopsin photopigment undergoes less bleaching in broadband light (~43% less) and with a slower regeneration rate (3.4X). During light adaptation, higher me

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7

Hendrikse, Egbert Johannes. "Influence of blue/green versus red and white light sources on human dark adaptation and other selected visual functions." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1009497.

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Red interior lighting used to preserve dark-adaptation needs to be replaced in military applications by blue/green lighting which is not detectable by 3rd-generation image intensifiers. This study investigated the influence of blue/green as compared to red and white light of equal photopic intensity on subsequent visual acuity , contrast sensitivity and dark-adaptation. Male subjects (n = 90) were assigned to one of 15 treatment conditions (n = 6) as determined by the colour (blue/green, red or white) and intensity (0.1; 0.4; 1.6; 6.4 and 25.6 cd/m²) of the pre-adaptation stimuli. A modified G

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8

Greene, Howard L. "Characterization of the light to horizontal cell signal transformation in the tiger salamander retina under varying states of dark adaptation /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487847761308738.

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9

Kelly, Jeremiah. "Isolating rod function in the human eye." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/isolating-rod-function-in-the-human-eye(1f695d6d-f902-480c-ae50-a990a490f5a6).html.

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The first chapter explains the motivation for measuring rod function, in particular the rod’s dynamic recovery from a substantial bleach which results in so-called ‘rate limited’ recovery of sensitivity. The physiological processes that underpin the replenishment of the rod photopigment are described and discussed, and explain the way in which rod function can act as a marker for retinal health. Overall, this chapter explains why rod function is worthy of further investigation.Then follows a description of the experimental methods used in the study of rod function, presented in later chapters.

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10

Paschon, Vera. "Modulação da expressão de conexinas na retina: um estudo morfológico, bioquímico e funcional." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/42/42137/tde-01072009-125513/.

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A vida é um processo dinâmico no tempo e no espaço, resultante da interação celular provida pelas junções comunicantes (JCs), canais formados por conexinas (Cxs) que permitem a passagem de moléculas de até 1kDa, e íons. O foco deste trabalho foi caracterizar a modulação de Cxs no desenvolvimento, adaptação visual e após trauma mecânico localizado na retina, através de técnicas como PCR em tempo real, western blot e imuno-histoquímica. No desenvolvimento, a Cx43 apresentou alta expressão no início (255%, P<0.01), a Cx45 teve alta expressão em todos os estágios, as Cx50 e Cx36 são pouco expressa

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11

Kauppinen, M. (Miia). "Context dependent variation in associations between grasses and fungal symbionts." Doctoral thesis, Oulun yliopisto, 2017. http://urn.fi/urn:isbn:9789526216287.

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Abstract Most plants form symbiotic associations with various fungi in natural ecosystems. Traditionally, many of these associations are viewed as mutually beneficial, but recent studies show that symbiotic interactions can be complex and labile. I studied the variability of interactions between grasses and fungi, using root-associated fungi and foliar endophytes in grasses as study systems. First, I studied experimentally how root-associated fungi colonize their host grasses in different natural and artificial conditions. I then investigated experimentally how foliar endophytes affect their h

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12

Marin, Olivier-Gilles. "L'architecture logicielle DARX : adaptation de la résistance aux pannes aux systèmes multi-agents." Le Havre, 2003. http://www.theses.fr/2003LEHA0008.

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Les applications réparties sont très sensibles aux défaillances de sites ou de processus. Ceci est d'autant plus vrai pour les systèmes multi-agents, susceptibles de déployer des multitudes d'agents sur un grand nombre de localisations. Toutefois, la tolérance aux fautes reste un procédé coûteux ; il convient donc de l'appliquer avec discernement. Le travail effectué dans cette thèse porte sur l'adaptation dynamique de la tolérance aux fautes au sein des plates-formes multi-agents. Le but de cette recherche est double : (1) fournir des méthodes de fiabilisation efficaces pour les systèmes mult

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13

Fanning, Sarah Elizabeth. "Changing fictions of masculinity : adaptations of Jane Eyre and Wuthering Heights, 1939-2009." Thesis, University of Exeter, 2012. http://hdl.handle.net/10871/8524.

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The discursive and critical positions of the ‘classic’ nineteenth-century novel, particularly the woman’s novel, in the field of adaptation studies have been dominated by long-standing concerns about textual fidelity and the generic processes of the text-screen transfer. The sociocultural patterns of adaptation criticism have also been largely ensconced in representations of literary women on screen. Taking a decisive twist from tradition, this thesis traces the evolution of representations of masculinity in the malleable characters of Rochester and Heathcliff in film and television adaptation

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14

Bleicher, Sonny S., Joel S. Brown, Keren Embar, and Burt P. Kotler. "Novel predator recognition by Allenby's gerbil (Gerbillus andersoni allenbyi ): do gerbils learn to respond to a snake that can “see” in the dark?" TAYLOR & FRANCIS LTD, 2016. http://hdl.handle.net/10150/622826.

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Unlike desert rodents from North America, Allenby’s gerbil (Gerbillus andersoni allenbyi) from the Negev Desert, Israel has evolved with snakes that do not have heat-sensitive sensory pits that enhance night vision. Does this history affect their ability to assess and respond to a snake that has this ability? As a test, we exposed gerbils to risk of predation from various predators, including snakes, owls, and foxes. The snakes included the Saharan horned viper (Cerastes cerastes) and the sidewinder rattlesnake (Crotalus cerastes). The former snake lacks sensory pits and shares a common evolut

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15

Vallée, Sven. "Algorithmes d’optimisation pour un service de transport partagé à la demande." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0063.

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L'objectif de cette thèse est de proposer des algorithmes d'optimisation efficaces pour un système de tranport en commun à la demande proposé par Padam Mobility, une start-up Parisienne. Après avoir modélisé le problème comme un DARP dynamique, trois modules d'optimisation sont présentés : un module online destiné à répondre aux requêtes en temps réel, un module de réinsertion pour insérer les requêtes rejetées par le module online et enfin un module offline basé sur une métaheuristique permettant d'optimiser en continue les itinéraires<br>The purpose of this thesis is to propose efficient opt

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16

Vallée, Sven. "Algorithmes d’optimisation pour un service de transport partagé à la demande." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0063.

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L'objectif de cette thèse est de proposer des algorithmes d'optimisation efficaces pour un système de tranport en commun à la demande proposé par Padam Mobility, une start-up Parisienne. Après avoir modélisé le problème comme un DARP dynamique, trois modules d'optimisation sont présentés : un module online destiné à répondre aux requêtes en temps réel, un module de réinsertion pour insérer les requêtes rejetées par le module online et enfin un module offline basé sur une métaheuristique permettant d'optimiser en continue les itinéraires<br>The purpose of this thesis is to propose efficient opt

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17

McIlhagga, William H., and R. Peterson. "Sinusoid = light bar + dark bar?" 2006. http://hdl.handle.net/10454/3613.

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No<br>A sinusoidal grating can be viewed as a series of light and dark bars. Here we measure the contrast discrimination thresholds for light and dark bars individually, and find that the contrast discrimination thresholds for the whole sinusoid can be explained as ideal summation of the light and dark bar thresholds. We propose a model for light bar, dark bar, and sinusoidal contrast discrimination which involves local light adaptation and multiplicative noise. The model accounts for the data very well, and also accounts for contrast discrimination of light and dark edges.

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18

CHEN, MING-XIAN, and 陳明顯. "The psychophysical test in dark adaptation on glaucomatous patient and normal observers." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/34931233165148636567.

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19

Berry, Justin David. "Effects of rhodopsin phosphorylation on dark adaptation and the recovery of sensitivity." Thesis, 2016. https://hdl.handle.net/2144/16720.

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Vision requires the photoreceptors in the eye to rapidly respond to changes in light intensity. These processes are accomplished within rod photoreceptors by the visual pigment rhodopsin that initiates a downstream signaling cascade called phototransduction. Rhodopsin is composed of an apoprotein opsin that is covalently bonded with light sensitive 11-cis retinal. Rhodopsin is activated when 11-cis retinal is photoisomerized into all-trans retinal. This isomerization initiates the phototransduction cascade that culminates in a change in current at the plasma membrane. Rhodopsin, once activate

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20

Mutungi, Rosemary Wavinya. "Field test of dark adaptation response for Vitamin A status and zinc status." 1989. http://hdl.handle.net/1993/9620.

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21

Chiang, Han-Kuei, and 江函桂. "I. Wavelength-dependent photocycle activity of xanthorhodopsin in the visible region II. Solvent isotope effect on the dark adaptation of bacteriorhodopsin in purple membrane." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/qkcp79.

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碩士<br>國立清華大學<br>化學系<br>105<br>Part I. Xanthorhodopsin (xR) is a dual-chromophore proton-pump photosynthetic protein comprising one retinal Schiff base and one light-harvesting antenna salinixanthin (SX). The excitation wavelength-dependent transient population of the intermediate M demonstrates that the excitation of the retinal at 570 nm leads to the highest photocycle activity and the excitations of SX at 460 and 430 nm reduce the activity to ca. 37% relatively, suggesting an energy transfer pathway from the S2 state of the SX to the S1 state of the retinal and a quick internal vibrational r

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22

Corthals, Kristina. "Behavioual Adaptations to Light Deprivation." Doctoral thesis, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E5D9-6.

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23

Charette, Yanick. "L’illusion des signaux pénaux : l’effet tendancieux de l’impunité différentielle." Thèse, 2015. http://hdl.handle.net/1866/12325.

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Réalisé sous la co-direction de Pierre Tremblay<br>En utilisant une approche économique du crime, cette thèse s’intéresse à la capacité des délinquants à minimiser leurs risques d’arrestation ou de condamnation et à l’impact de cette adaptation différentielle sur la manière dont on devrait interpréter le profil du délinquant qu’offrent les statistiques policières ou correctionnelles. Les études qui ont utilisé cette approche ont surtout insisté sur les coûts pénaux, mais omettent de prendre en considération les bénéfices que procurent les crimes aux délinquants et leur vulnérabilité différenti

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24

Jones, Stephen Matthew. "Frank Miller's Ideals of Heroism." Thesis, 2007. http://hdl.handle.net/1805/898.

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Thesis (M.A.)--Indiana University, 2007.<br>Title from screen (viewed on May 23, 2007) Department of English, Indiana University-Purdue University Indianapolis (IUPUI) Includes vita. Includes bibliographical references (leaves 103-110)

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