Rozprawy doktorskie na temat „Visitor impacts”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 50 najlepszych rozpraw doktorskich naukowych na temat „Visitor impacts”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.
Daniels, Melissa Lynn. "Minimizing Visitor Impacts to Protected Lands: An Examination of Site Management and Visitor Education Methods". Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/42509.
Pełny tekst źródłaMaster of Science
Reid, Scott Edmonds. "An Adaptive Assessment of Visitor Impacts to Protected Areas". Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/32365.
Pełny tekst źródłaMaster of Science
Turner, Rex. "Visitor Behaviors and Resource Impacts at Cadillac Mountain, Acadia National Park". Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/TurnerR2001.pdf.
Pełny tekst źródłaLittlefair, Carolyn Joy, i n/a. "The Effectiveness of Interpretation in Reducing the Impacts of Visitors in National Parks". Griffith University. School of Environmental and Applied Science, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050324.085357.
Pełny tekst źródłaWood, Kerry Todd. "Assessing Recreation Impacts to Cliffs in Shenandoah National Park: Integrating Visitor Observation with Trail and Recreation Site Measurements". Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33032.
Pełny tekst źródłaMaster of Science
Farrell, Tracy Ann. "Visitor Impact Assessment and Management for Protected Areas in Central and South America". Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/40425.
Pełny tekst źródłaPh. D.
RAMTAHAL, JOEL FABIAN. "CAMPSITE IMPACTS IN WILDERNESS VS. VISITOR WILLINGNESS TO PAY FOR ITS PRESERVATION". OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/817.
Pełny tekst źródłaLeujak, Wera. "Monitoring of coral communities in South Sinai, Egypt, with reference to visitor impacts". Thesis, University of London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430866.
Pełny tekst źródłaLee, Nathaniel H. "Environmental Impacts of Camping in Low Regulatory Wilderness: Geographic Patterns in the Allegheny National Forest and their Implications for Management". Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1523442960070504.
Pełny tekst źródłaSquires, Carolyn. "An Assessment of Trampling Impact on Alpine Vegetation, Fiordland and Mount Aspiring National Parks, New Zealand". Thesis, University of Canterbury. Environmental Science, 2007. http://hdl.handle.net/10092/1494.
Pełny tekst źródłaDawson, Jordan O. "The impacts of mega events : a case study of visitor profiles, practices and perceptions in the Queen Elizabeth Olympic Park, East London". Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/33762.
Pełny tekst źródłaLewis, Anna Rose. "Remote camping along the Ningaloo Coast, Western Australia: relationship between management and the variables of visitor preferences, resource use and environmental impacts". Thesis, Curtin University, 2013. http://hdl.handle.net/20.500.11937/2176.
Pełny tekst źródłaD'Antonio, Ashley L. "Recreation Resource Impacts in the Bear Lake Road Corridor of Rocky Mountain National Park, Colorado, USA: An Assessment of Resource Conditions and Visitor Perceptions". DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/817.
Pełny tekst źródłaBritto, Pedro Dultra. "Capacidade de visitação : ensaio metodologico para trilhas em unidade de conservação". [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258660.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
Made available in DSpace on 2018-08-07T16:46:41Z (GMT). No. of bitstreams: 1 Britto_PedroDultra_M.pdf: 4022364 bytes, checksum: a2a36ac1c1293d260a305103591dd335 (MD5) Previous issue date: 2005
Resumo: Estudos sobre capacidade de visitação são necessários para o planejamento e gestão da visitação pública em Unidades de Conservação. O uso destas áreas naturais para visitação pode acarretar impactos indesejados, e o equipamento mais comum utilizado nesta atividade é também o que mais fragiliza o meio conservado: a trilha. As metodologias disponíveis atualmente, e utilizadas para este tipo de avaliação em trilhas de UCs brasileiras, são, normalmente, estrangeiras e extemporâneas. Considerando que isto pode ser uma inadequação para as características bastante diversificadas das UCs brasileiras, quais critérios são válidos para a escolha de uma, ou várias, metodologias de avaliação desta capacidade ou dos impactos advindos da visitação pública? Este estudo aborda várias metodologias, notadamente as três mais utilizadas, sob a perspectiva de uma trilha brasileira que possui intensa visitação pública: A Trilha do Castelinho, localizada no Jardim Botânico de São Paulo, dentro do Parque Estadual Fontes do Ipiranga. Ele também pretende estruturar, a partir da abrangência destas três metodologias, a formulação de uma nova, híbrida, que responda satisfatoriamente a uma realidade brasileira
Abstract: Studies about carrying capacity are necessary for the planning and management for visitor in environment Conservation Areas. Visitor in these areas can cause undesirable impact, and the main apparatus in this activity is the most fragile in the Conservation Area: tracks. The methods available to evaluate this impact in Brazilian Conservation Areas are normally foreign considering that this might be inadequate for the diversity of the Brazilian Conservation Areas, which criterions are valid in the choice of one or more evaluate methods in carrying capacity or visitor? This study analyzes three different methods that are the most used in one tracks that has visitor: The "Trilha do Castelinho" in the São Paulo Botanic Garden , in Fontes do Ipiranga State Park . This study also intend to develop a new method, from these three that correspond to the Brazilian reality
Mestrado
Saneamento e Ambiente
Mestre em Engenharia Civil
Araujo, Carolina Dutra de. "Perfil do Visitante e Capacidade de Carga Tur?stica em ?reas Protegidas: o caso do Parque Estadual da Ilha Grande, RJ". Universidade Federal Rural do Rio de Janeiro, 2006. https://tede.ufrrj.br/jspui/handle/tede/480.
Pełny tekst źródłaThe objective of this work was to contribute to the study of tourism environmental planning, specifically Tourism Carrying Capacity methodologies. To do this, two methods were compared, Limits of Acceptable Changes (LAC) e Visitor Activities Management Process (VAMP), in relation to the adequacy to the area, identifying the environmental risks and anthrop pressures; and related to the focus on local issues and the visitors profile, in Praia Preta, located in the Parque Estadual da Ilha Grande, Angra dos Reis, RJ. Few differences were observed between the methods, with little advantage to LAC. We suggest that two fundamental components should take part of a Tourism Carrying Capacity framework: the visitors profile and activities and the residents perception related to local tourism. Such information should compose the management strategies in Protected Areas.
O objetivo da pesquisa foi contribuir para o estudo do planejamento ambiental tur?stico, especificamente sobre as metodologias de Capacidade de Carga Tur?stica. Para tanto, foram comparados dois m?todos, Limits of Acceptable Changes (LAC) e Visitor Activities Management Process (VAMP), quanto ? adequa??o ao local, identificando os riscos ambientais e press?es antr?picas; e quanto ? aten??o ?s quest?es locais e perfil do visitante, na Praia Preta, localizada no Parque Estadual da Ilha Grande, Angra dos Reis/RJ. Observaram-se poucas diferen?as entre os m?todos, com algumas vantagens para o LAC. Sugeriram-se que dois componentes fundamentais devem fazer parte de uma metodologia de Capacidade de Carga Tur?stica: a caracteriza??o do perfil e atividades praticadas pelo visitante e a percep??o dos residentes acerca do turismo no local, informa??es que deveriam compor as estrat?gias de manejo em ?reas protegidas.
Hardiman, Nigel John, University of Western Sydney i of Science Technology and Environment College. "Visitor impact management in canyons of the Blue Mountains, New South Wales". THESIS_CSTE_xxx_Hardiman_N.xml, 2003. http://handle.uws.edu.au:8081/1959.7/9.
Pełny tekst źródłaDoctor of Philosophy (PhD)
Chariandy, Celeste Marie-Ange. "The Impact of the NIHERST/NGC National Science Centre, Trinidad and Tobago on Visiting Student Groups". Thesis, Högskolan Dalarna, Vetenskapskommunikation, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:du-1161.
Pełny tekst źródłaGuthrie, Catherine M. "Sense making and sense giving : using visitor narratives to understand the impact of visitor interactions on destination image". Thesis, Robert Gordon University, 2007. http://hdl.handle.net/10059/179.
Pełny tekst źródłaToews, Valerie. "A backcountry visitor impact management strategy for Riding Mountain National Park". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0007/MQ45128.pdf.
Pełny tekst źródłaFletcher, Helen. "The impact and management of visitor pressure on Rocky Shore communities". Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363528.
Pełny tekst źródłaHardiman, Nigel John. "Visitor impact management in canyons of the Blue Mountains, New South Wales /". View thesis, 2003. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030708.115013/index.html.
Pełny tekst źródła"Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy, Centre for Integrated Catchment Management, University of Western Sydney, April 2003" Bibliography : leaves 338-356.
Seakins, Amy Jane. "Meeting scientists : impacts on visitors to the Natural History Museum, London". Thesis, King's College London (University of London), 2015. http://kclpure.kcl.ac.uk/portal/en/theses/meeting-scientists(7365644c-734b-4970-a61e-4d3597dd803e).html.
Pełny tekst źródłaBarros, Maria Isabel Amando de. "Caracterização da visitação, dos visitantes e avaliação dos impactos ecológicos e recreativos do planalto do Parque Nacional do Itatiaia". Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-23092003-140646/.
Pełny tekst źródłaThe goals of this research were to describe and evaluate the current ecological and social impact on trails and campsites, as well as to characterize the visit and visitors of upper Itatiaia National Park (INP). Based on this information, it was intended to understand impact-use relationships and to explore the guidelines of a visitor education program designed to encompass minimum impact techniques that would contribute to minimize the problems found. A questionnaire was applied to 605 people from February to August 2002 in order to get information about visit and visitors. Trails and campsites conditions were assessed through ecological and social indicators. After 1996 the number of visitors at the Parks upper lands was comparatively higher than the number of visitors at the lower Park. This demonstrates that there was an increase of interest about activities related to climbing, camping and hiking. Meanwhile around 84% of people that visit PNI highlands are concentrated at the two main peaks of the area, Agulhas Negras and Prateleiras, besides Rebouças Hut. The fact that the use is concentrated on the two mentioned trails possibly contributes to the values significantly different found in the impacts related to total trail width, trail depth and trail transversal area. The educational level of visitors is high, since 72% are in college or have a college degree. This and the fact that 90% of visitors mentioned that the presence of management actions did not disturb or contributed to their experience, is an indicator that PNI visitors are receptive to a higher presence of recreation management and would accept a visitor education program. The campsite impact assessment revealed that from 1998 to 2002 all indicators were reduced, with the exception of total bare area. That is the result of the campsites closure after a fire at Prateleiras Area in July 2001. The detailed assessment of campsite areas shows that the most important problems are related to use and result from lack of information and technical knowledge about impacts caused by camping activities and about ways to minimize them. Based on the results found guidelines of a visitor education program about minimum impact techniques were designed. They should include techniques related to the following issues: deterioration of constructed trails, development of undesired user-created trails, proliferation of campsites, deterioration of established campsites, litter, human waste and crowding.
McLean, Kevin Daniel. "Interpreter Attributes and Their Impact on Visitor Outcomes in National Park Service Interpretive Programs". Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/19288.
Pełny tekst źródłaMaster of Science
Whalley, Peter A. "Resident perceptions of the sociocultural impacts of tourism in Llangollen, north-east Wales". Thesis, Sheffield Hallam University, 2000. http://shura.shu.ac.uk/20521/.
Pełny tekst źródłaMilanowski, Shannon M. "Visitor Awareness of Low-impact Camping Techniques in the Wilderness Area Isle Royale National Park, Michigan: An Investigation of Possible Affecting Factors". Ohio : Ohio University, 2002. http://www.ohiolink.edu/etd/view.cgi?ohiou1037696738.
Pełny tekst źródłaEast, Duncan. "Environmental performance of a conservation attraction : the potential impact of visitor learning and behaviour change". Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/420754/.
Pełny tekst źródłaSwart, Lidia. "The impact of social media on the existence of visitor information centres in South Africa". Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/60521.
Pełny tekst źródłaDissertation (MCom)--University of Pretoria, 2016.
Tourism Management
MCom
Unrestricted
Giles, Andrew. "Exploring the Social, Environmental and Economic Aspects of Trail Surfacing Decisions". Thesis, University of Waterloo, 2002. http://hdl.handle.net/10012/964.
Pełny tekst źródłaCirino, Sílvia Fernandes Ribau. "Turismo e migrações : impacto das visitas a Portugal dos emigrantes". Master's thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/1567.
Pełny tekst źródłaA mobilidade humana constitui uma característica do Homem, presente ao longo dos séculos, sob diferentes formas ditadas pela evolução dos povos e da vida em sociedade. Embora os fluxos migratórios façam parte da história da humanidade há muitos séculos atrás, os movimentos turísticos se democratizam e tomam proporções significativas apenas a partir do século XX. Neste contexto, o presente trabalho tem como objectivo principal contribuir para o conhecimento na área da mobilidade humana e mais precisamente, nas áreas do turismo e das migrações, e das interligações existentes entre estes dois conceitos. As visitas ao país de origem dos emigrantes fazem parte, de forma cada vez mais significativa, do projecto migratório e contribuem para um aumento considerável do mercado turístico nomeado Visita a Familiares e Amigos (VFA). A importância das ligações mantidas entre os emigrantes e a terra de origem, assim como as suas contribuições directas para o crescimento do turismo, estão claramente demonstradas neste trabalho de investigação. Os laços emocionais, sociais, políticos, económicos e comerciais que unem uma determinada região à sua comunidade residente no estrangeiro, contribuem para o aumento das remessas dos emigrantes e provocam um crescimento da frequência das visitas ao país de origem. Consequentemente, o volume dos fluxos turísticos assim como as receitas provenientes dos fluxos humanos originários da emigração, geram desenvolvimento do turismo internacional. Portugal, país de grande tradição emigratória, beneficiando directamente deste fenómeno, é objecto de estudo do presente trabalho. O estudo está centrado mais precisamente sobre o comportamento dos emigrantes do concelho de Ílhavo. São determinadas as principais características das viagens de regresso destes emigrantes, assim como a importância da intensidade das ligações mantidas com a sua terra de origem, para o crescimento do turismo receptor ao nível regional e nacional. ABSTRACT: Human mobility has been considered an important characteristic of the human being during centuries, dictated by people evolution and by the life in society. Although migratory flows form part of the human history since many centuries, tourist flows have been democratized in the twentieth century taking enormous proportions. In this context, the broad intent of this study is to contribute to the existing literature that addresses to develop forms of mobility such as tourism and migration, as well as the existing relationships between those two concepts. Return visits of migrants are increasingly part of the migratory project and contribute for a significant rise in the Visit Friends and Relatives (VFR) tourist market. This research work demonstrates the importance of the linkages maintained between the migrant community and their home country, as their direct contributions to the growth of tourism. Emotional, social, political, economic and commercial linkages between a region and its resident abroad community, contribute to increase fund transfers from migrants, coming from host country, and to increase the frequency of return visits. Consequently, the volume of tourist flows, as well as the receipts coming from these human flows originated by migration, contributes to the development of international tourism. Portugal, a country with a large emigration tradition, profiting directly from this phenomenon, is studied in this work. The research is focused, more precisely, on the behavior of the Council of Ílhavo’s emigrants. Principals’ characteristics of migrants’ return visits were found out, as well as the importance of the intensity of existing ties between those migrants and the home region, for the growth of inbound tourism at the regional and national level.
Ng, Ho-yee Janet, i 伍可怡. "Impact of vision and hearing impairments on social participation". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B45010377.
Pełny tekst źródłaBrown, Amanda. "The Impact of Vision on Movement of Older Adults". Cleveland State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=csu1465758466.
Pełny tekst źródłaCoppo, Joseph Lewis 1963. "Impacts of near park development on visitor's perception of Tuzigoot National Monument, Arizona". Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277970.
Pełny tekst źródłaAlhumaid, Jameel. "The educational impacts of class visits to the Kennedy Museum of Art /". View abstract, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3205447.
Pełny tekst źródłaWolf, Isabelle Diana Felicitas Gudula Biological Earth & Environmental Sciences Faculty of Science UNSW. "Towards sustainable tourism in outback Australia: the behaviour and impact of nature-based tourists on vegetation and selected wildlife species". Awarded by:University of New South Wales. Biological, Earth & Environmental Sciences, 2009. http://handle.unsw.edu.au/1959.4/44572.
Pełny tekst źródłaChang-Hui, George Yang. "A study of foreign visitors, their motivations and impact on tourism development in Taiwan". FIU Digital Commons, 1988. http://digitalcommons.fiu.edu/etd/2110.
Pełny tekst źródłaKurdi, Heba. "The impact of visitors satisfaction in explaining expenditure behaviour : A structural equation modelling approach". Thesis, Högskolan Dalarna, Nationalekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:du-30030.
Pełny tekst źródłaRigoulot, Simon. "Impact comportemental et électrophysiologique de l'information émotionnelle en vision périphérique". Phd thesis, Université du Droit et de la Santé - Lille II, 2008. http://tel.archives-ouvertes.fr/tel-00370746.
Pełny tekst źródłaEn premier lieu, nous avons voulu explorer la capacité de la VP à traiter des images de scènes naturelles dont certaines contiennent des informations émotionnelles. Nous avons notamment observé pour la première fois l'existence de composantes électrophysiologiques évoquées par la VP. De plus, nous avons pu constater que le contenu émotionnel des images module les performances comportementales des participants ainsi que leur activité cérébrale, comme classiquement décrit en VC. Ces résultats plaident en faveur d'une différentiation précoce des informations visuelles présentées en VP selon leur nature affective et permet d'envisager leur utilisation dans le cadre de la rééducation neurovisuelle.
En deuxième lieu, et ayant à l'esprit les possibilités de rééducation neurovisuelle, nous avons cherché les stimulations susceptibles de mobiliser au mieux les ressources visuelles, pour ensuite les associer, en VP, à des informations émotionnelles. En conséquence, nous nous sommes intéressés au traitement de visages émotionnels (peur, neutre, joie) en VP car ils constituent, du fait de leur rôle dans les interactions sociales, des stimulations visuelles particulièrement saillantes. Cette étude a permis de montrer que les visages sont traités en VP et que leur expression émotionnelle a un impact au niveau comportemental et électrophysiologique. En particulier, les réponses des participants sont plus rapides et les composantes évoquées sont plus amples lorsque des visages de peur et de joie sont présentés en VP par rapport à des visages neutres.
Enfin, certaines études suggèrent une amélioration des performances de la VP lorsque des stimuli sont présentés en mouvement. De ce fait, la saillance des visages en VP pourrait être renforcée par le caractère dynamique de leur expression émotionnelle. Dans une troisième expérience, nous avons donc présenté des visages statiques et des visages animés, neutres et émotionnels, en VC et en VP. Les résultats obtenus confirment les données de la seconde expérience mais ne permettent pas d'attribuer un avantage spécifique à la composante dynamique des visages présentés, qu'ils soient émotionnels ou neutres.
A titre prospectif, nous avons présenté, à des patients atteints de scotomes centraux, des visages émotionnels et neutres. Les résultats comportementaux permettent de mettre en évidence que, chez ces patients, les visages émotionnels sont mieux traités que les neutres en VP. Les expressions faciales émotionnelles pourraient donc s'avérer des stimuli particulièrement adaptés dans le cadre de l'amélioration des ressources de la VP.
En conclusion, ce travail apporte des données comportementales et électrophysiologiques inédites sur le codage de l'information émotionnelle en VP et ouvre des perspectives encourageantes sur l'utilisation de la saillance émotionnelle dans la rééducation des déficits de la vision centrale.
Whittam, Daniel J. "The impact of cataract surgery on driving and vision performance". Thesis, Queensland University of Technology, 2002. https://eprints.qut.edu.au/36774/1/36774_Digitised%20Thesis.pdf.
Pełny tekst źródłaSalewski, Katja. "Museum Personalized : The impact of floor staff on an exhibition - A holistic approach". Thesis, Högskolan Dalarna, Vetenskapskommunikation, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:du-2534.
Pełny tekst źródłaBelin, Laurine. "Impact des stimuli visuels sur la réactivité émotionnelle". Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1B058.
Pełny tekst źródłaIn this thesis, we wondered if some visual stimuli could have universal emotional valence in vertebrates. A first series of experiments was conducted in the laboratory on various species of birds (e.g. starlings, Japanese quail and raptors). Each species of bird tested, negatively perceived a visual stimulus in particular. Indeed, during its display this stimulus induced 1) rapid withdrawals/takeoffs in a majority of individuals (about 2 seconds after the start of the display); 2) a change of trajectory of a group of birds in flight, and 3) kept a negative emotional valence for birds, even after repeated displays. In a second phase, the same stimulus was tested on a wide range of bird species (eg shorebirds, gulls, ducks and pigeons) under natural conditions. We were then able to 1) validate the negative emotional impact of this stimulus; 2) reveal a different sensitivity to color characteristics of the stimulus according to species, and also 3) its long-term effectiveness on bird food context. Finally, the perception of visual stimuli whose emotional valence was known in birds has been studied in horses and humans. Visual attention was mainly noted in these two species. Moreover, the presence of an autism spectrum disorder seems to influence the perception of certain visual stimuli. This work has highlighted the existence of a visual stimulus with universal emotional valence in birds. The influence of two factors on the perception of the emotional valence was also revealed: 1) specific factor and 2) developmental factor
Kovarski, Caroline. "Impact des troubles visuels sur la performance scolaire". Thesis, Lyon 2, 2015. http://www.theses.fr/2015LYO20004/document.
Pełny tekst źródłaMany students understate their visual discomfort, although it may have an educational impact. We studied the prevalence of visual disorders among students and compared these results to their academic level.Between September 2012 and April 2013, four hundred students between fifteen and twenty two years of age responded to a questionnaire followed by a visual screening (refraction and binocular vision) in order to detect any visual discomfort that they might be unaware of. When visual problems were detected, the participants were asked to have an ophthalmology and orthoptic assessment. Then the participants’ academic performance was appraised and subjects were reviewed to determine whether wearing the appropriate optical correction or taking orthoptic care have improved their grades.The results indicate that the questionnaire score is very significant to predict the probability of having academic difficulties or vision problems, that ametropia and accommodation anomalies increase academic difficulties and that binocular vision disorders are even more disadvantageous. Moreover, not spontaneously expressing visual discomfort doesn’t mean that there are no visual defects.Once controlled by variables commonly used to explain academic difficulties (e.g. academic delay, occupational category, gender, etc.) a significant proportion of participants’ academic difficulties are related to vision anomalies. Therefore, vision screening among adolescents appears to be necessary, especially if there are academic difficulties. In addition, the questionnaire used in case history seems to be an effective tool to detect vision anomalies and should be validated with a larger sample
Kim, Min Kook. "Monitoring Vegetation Change by Using Remote Sensing: An Examination of Visitor-Induced Impact at Cadillac Mountain, Acadia National Park". Fogler Library, University of Maine, 2010. http://www.library.umaine.edu/theses/pdf/KimMK2010.pdf.
Pełny tekst źródłaNgu, Wee Sing. "The impact of Endocuff Vision on adenoma detection rates in colonoscopy". Thesis, Durham University, 2018. http://etheses.dur.ac.uk/12516/.
Pełny tekst źródłaLiu, Bing. "The impact of diplomatic visits on China's international trade and FDI". Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7418/.
Pełny tekst źródłaAbdullah, Fadhlin. "The Malaysian construction industry : an analysis on the impact of Vision 2020". Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393454.
Pełny tekst źródłaWinter, Simon. "Transverse Chromatic Aberration and Vision: Quantification and Impact across the Visual Field". Doctoral thesis, KTH, Biomedicinsk fysik och röntgenfysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-186334.
Pełny tekst źródłaÖgat är vårt fönster mot världen, och syn har mätts och studerats i stor utsträckning över åren. Trots detta är forskningen om mänsklig syn oftast begränsad till det centrala synfältet, och i studier av det perifera synfältet korrigeras optiska fel endast över ett smalt våglängdsområde. Denna avhandling vidgar forskningen om vår syn till att inkludera hela det synliga spektrumet över ett stort synfält. Ett brett spektrum innebär att vi måste ta hänsyn till våglängdsberoendet i ljusets brytning i ögat; ögats optik kan därför inte avbilda ett objekt till samma bildläge på näthinnan för alla våglängder, ett fenomen som kallas kromatisk aberration. Vi presenterar här en ny metod för att mäta mängden transversell kromatisk aberration (TCA) över ögats synfält och visar att ögats TCA ökar linjärt med vinkeln ut i synfältet (ungefär 0,21 bågminuter per grad från 543 nm till 842 nm). Dessutom har vi implementerat adaptiva psykofysiska mätmetoder för att kvantifiera effekten av TCA på central och perifer syn. Våra resultat visar att extra inducerad TCA påverkar den perifera förmågan att upptäcka sinusformade randmönster mer än den centrala förmågan att upplösa motsvarande ränder (mer än 0,05 logMAR per bågminut inducerad TCA i periferin jämfört med 0,03 logMAR/bågminut centralt). Vid utvärdering av perifer syn rekommenderar vi att använda sinusformade randmönster med en sned riktning jämfört med synfältsmeridianen. Resultaten som presenteras i avhandlingen har klinisk betydelse för att förbättra den perifera synen och är även viktiga för tekniker som avbildar ögats näthinna. För att begränsa den negativa effekt TCA har på synen ska man undvika att inducera extra TCA, t.e.x. när ögats perifera refraktiva fel korrigeras med glasögon för människor med makula degeneration och centralt synfältsbortfall. Vid avbildning av näthinnan ger ögats TCA förskjutningar mellan bilder i olika våglängder. Därför kan mätningar av TCA, tillsammans med välkontrollerad linjering av pupillens position och efterföljande kompensation, förbättra funktionen hos dessa instrument.
QC 20160511
Nieman, Chelsey L. "Visual Ecology of Lake Erie Fishes: An Investigation of the Impacts of ElevatedTurbidity on Vision". The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555421470203573.
Pełny tekst źródłaBallantyne, Gavin. "Ants as flower visitors : floral ant-repellence and the impact of ant scent-marks on pollinator behaviour". Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2535.
Pełny tekst źródłaFort, Patrice. "Rôle de la dystrophine Dp71 dans l'oeil : Impacts phénotypiques". Université Louis Pasteur (Strasbourg) (1971-2008), 2005. https://publication-theses.unistra.fr/public/theses_doctorat/2005/FORT_Patrice_2005.pdf.
Pełny tekst źródłaThe first phenotype to be described among patients suffering from the Duchenne muscular dystrophy (DMD) is the progressive muscular degeneration related to the absence of the hole DMD gene product: the dystrophin. Various work undertaken thereafter led to the description of others troubles among these patients, affecting in particular their cognitive performances in a nonprogressive way. These works also made it possible to show that these affections were particularly related to the DMD gene short products and particularly Dp71. Dp71 is the mainly expressed product of this gene in many tissus among which the central nervous system including the retina. The discovery, in the middle of the 1990’s, that 80% of the DMD patients present a disturbance of the retinal neurotransmission led us to study the role of the dystrophins and in particular Dp71 in the retina using a transgenic mouse in which the expression of this protein was inactivated. This study enabled us to show that this DMD gene product is only expressed by the main glial cells of the retina, the Müller glial cells, where it is only accompanied by the utrophin, the product of an homologous gene of the dystrophin. We have also shown that Dp71 was responsible for the localization of two proteins essential for the homeostasis regulation of the retina: the potassic channel Kir4. 1 and the aqueous channel AQP4. Moreover the absence of Dp71 induce a significant increase in neuronal death following an ischaemic event putting forward the intervention of Dp71 in the regulation of retinal homeostasis. At the time of the clinical study of the defective mouse for the Dp71, we discovered another pathological phenomenon dependent on the absence of this protein: the development of a progressive congenital cataract. Since dystrophins had never been studied in the crystalline lens, we first characterized their expression in this structure and showed that Dp71 is also there the main DMD gene product and that it is mainly expressed in the membrane of the crystalline lens secondary fibers where it colocalize with the β-dystroglycane and the aquaporin channel AQP0. Although complementary studies are necessary, this seems to indicate that it takes part in a macromolecular complex responsible for the conservation of the integrity of the membrane of secondary fibres of the crystalline lens. The whole of this work puts forward the role of Dp71 in the vision, as well in one part of the central nervous system, the retina, as in a very specific epithelial tissue, the crystalline lens