Le travail de cette thèse a été consacré au développement d’une nouvelle méthode de détection pour un système anticollision par la mesure de trajectographie, ce qui pourrait contribuer aux systèmes d’aide à la conduite. Pour obtenir une haute probabilité de détection, nous avons choisi la solution de vidéo stéréoscopique coopérative : la coopération entre véhicules rend la détection plus facile et fiable. Il y a deux participants dans le système : les véhicules « porteurs du système » aussi bien que les « suiveurs », sont équipés de caméras stéréoscopiques, c’est à dire de deux capteurs d’image, appartenant à des familles technologique à haute cadence; les véhicules « cibles » sont équipés des feux à Leds modulés, dont la fréquence de modulation est déjà connue par les véhicules « suiveurs ». Après filtrage dans l’espace temporel, le système ne détecte que des signaux issus des feux modulés, ce qui réduit fortement l’information à traiter par rapport aux calculs de trajectographie traditionnels. La détection de feux modulés est donc réalisée par le filtrage par traitement numérique des images, qui est adapté à la fréquence de modulation recherchée. Pour cela, nous avons proposé 3 types de filtres adaptés à la fréquence de modulation et conçus de façon à rejeter au mieux les signaux de fond.Pour évaluer les performances tant en détection qu’en réjection des fausses alarmes, nous avons d’abord effectué des simulations numériques en prenant en compte des signaux artificiels, puis des calculs sur vrais signaux obtenus dans les expérimentations avec véhicule d’essai statique, puis roulant. Les roulages étaient de différentes vitesses, de 30km/h jusqu’à 100km/h, ce qui nous a permis d’analyser le signal issu du feu ainsi que le comportement de nos filtres à des vitesses angulaires de feu nulles, faibles ou élevées. Le résultat de ces expérimentations montre que le filtrage permet de détecter les feux à Leds de type DRL jusqu’à 140m sans aucune fausse détection sur le fond. Ces expérimentations sont une étape essentielle pour définir de façon plus précise un tel système, en particulier dans le choix du seuil. Nous avons aussi évalué des technologies qui peuvent améliorer la performance du système, mais qui ne sont pas encore prêtes à industrialiser. Par exemple, les « rétines » artificielles nous permettent d’utiliser les filtres analogiques intégrés, et ainsi de réduire leurs bandes passantes. / This thesis was devoted to the development of a new detection method for vehicular collision avoidance system based on trajectory measurement, which could contribute to driver assistance systems.In order to obtain high detection probability, we have chosen the cooperative stereoscopic video solution: the cooperation between vehicles makes it easier and more reliable when they aim to detect each other. There are two participants in the system: the “system carriers" vehicles, or the " followers" are equipped with stereoscopic cameras (two image sensors), who belong to high speed technology families; the "targets" vehicles are equipped with modulated LED lights, with the modulation frequency being already known by the "followers". After space-time filtering, the system detects the signals emitted bymodulated lights sources, which greatly reduces the amount of information to be processed comparing to traditional trajectory calculations methods. The detection of modulated light is achieved by filtering based on digital image processing, which is adapted to the desired modulation frequency. We have proposed three types of filters suitable for detecting the modulation at this frequency and at the same time for rejecting the background as well as possible.In order to be able to evaluate the performances of both detecting signals and rejecting false alarms, we first performed numerical simulations based on the model signals, then calculations on real signals acquired in static and driving experiments. The tested speeds were from 30km/h up to 100km/h, which allowed us to analyze the signals emitted from vehicle lights as well as the behavior of our filters under different angular velocities of the lights (zero, low and high). The result of these experiments showed that our method of filtering could detect LED-type DRL lights up to 140m without any false alarm. This is essential to define more precisely the values of thresholds of such systems. We have also evaluated technologies that are possible to improve system performance in the future, which are not yet ready to be used in industry productions. For example, artificial "retinas" could allow us to integrate analog filters in the chips, and thus to reduce bandwidth of the filters.

Väntrum och ångest har en stark koppling med varandra. Majoriteten av Sveriges befolkning besöker ett väntrum som patient minst en gång per år. I dagsläget planeras belysningen i första hand för vårdpersonalens behov och förutsättningar. På grund av detta blir ljusmiljön och väntrumsupplevelsen för patienter kan bli lidande. För att kunna skapa tillfredställande väntrumsmiljöer undersöktes det om det finns någon koppling mellan ångest och ljusnivå. I studien undersöktes även ljusupplevelsen och inverkan av fönster med utsikt på patienters ångest.  Studien undersökte påverkan av låg och hög belysningsstyrka samt påverkan av fönster på ångest. Dessutom undersöktes hur olika rumsutformning och belysningslösning påverkar upplevelsen av ljusmiljön och miljöns inverkan på måendet. Med hjälp av en förstudie kunde ett experiment utformas där fyra olika ljusscener testades. För att undersöka om fönster och utsikt har en påverkan, har två typrum skapats: ett med fönster och ett utan fönster.  Deltagarna i studien bestod av 16 kvinnor och 8 män med en blandning av studenter och yrkesverksamma som fick svara på 5 enkäter. Enkäter utvecklades från väl validerade metoder för att få svar från deltagarna angående hur de har mått de senaste två veckorna. Även hur deltagarna kände och upplevde ljusscenerna under experimentet, detta för att kunna besvara studiens frågeställningar.  Resultatet visade inga signifikanta skillnader gällande belysningsstyrkans eller fönsters påverkan på ångest. Men resultatet visade också att det fanns signifikanta skillnader i ljusupplevelsen när det kommer till ljushet, trygghet, ljusfärg samt bländning. Slutsatsen av studien är att belysningen kan påverka ljusupplevelsen och måendet. Men mer forskning behövs när det kommer till belysningsstyrkans samt fönster och utsikts påverkan på ångest. / Waiting rooms and anxiety have a strong connection with each other. Most of the Sweden's population visit a waiting room as patient at least once a year. At present, the lighting is primarily planned for the health professionals´ needs and conditions. Because of this, the lighting environment and the waiting room experience for patients suffers. To be able to create satisfying waiting room environments, this study wants to examine whether there is a connection between anxiety and light level. Also, it studies how the light will be experienced and if windows with views affects patient’s anxiety.  The study examined the influence of low and high illuminance and the influence of windows on anxiety. In addition, it was investigated how different room shapes and lighting solution affect the experience of the light environment and the environmental impact on the mood. With the help of a prestudy, an experiment could be designed where four different light scenes were tested. To investigate whether windows and views have an impact, two types of test rooms have been created: one with windows and one without windows. The participants in the study consisted of 16 women and 8 men with a mixture of students and professionals who had to answer 5 questionnaires. The questionnaires were developed from well-validated methods to get answers from the participants regarding how they have felt the last two weeks. Also, how the participants felt and experienced the light scenes during the experiment, in order to be able to answer the questions of the study.  The result showed no significant differences regarding the effect of illuminance or window on anxiety. The result showed however that there were significant differences in the light experience when it comes to brightness, safety, colour of the light and glare. The conclusion of the study is that the lighting can affect the light experience and the mood. But more research is needed when it comes to illuminance and windows and views impact on anxiety.

Människan är utvecklad under dagsljusets dynamiska variation avfärgtemperatur, riktning och intensitet. Variationen påverkar våra känslor och prestation positivt. Problemet idag är att vi vistas ca 90% av dagen inomhus och att den artificiella belysningen inomhus oftasaknarvariation. Med varierande färgat ljus kan en ombytlig och stimulerande miljö skapas för att förbättra framtida belysningsmiljöer. Denna studie har undersökt hur brukarens motivation, välmående och koncentration påverkas av varierande färgad vertikalbelysning. En miljö som snabbt skulle bli enformig och understimulerande kan istället få en intressant variation som gör den brukbar en längre tid med denna belysningslösning, utan att motivationen eller välmåendet avtar. Belysningslösningen är ämnad att användas i perioder och fungera som en ”boost”. Experimentet var uppdelat i två behandlingar, en med arbetsbelysning utformad efter svensk belysningsstandard utan något vertikalljus och en där den färgskiftande vertikalbelysningen var adderad till arbetsbelysningen. Behandlingarna utfördes i en simulerad kontorsmiljö på Jönköpings Tekniska Högskola. Behandlingen med varierande färgad vertikalbelysningen skiftade långsamt i ljusfärger genom hela det synliga färgspektrumet på rummets vertikala ytor, detta för att skapa en variation i rummet. Under experimentets gång fick försökspersonerna besvara enkäter och genomföra koncentrationstest för att se hur det färgskiftande ljuset påverkade välbefinnandet och den kognitiva förmågan. Resultatet visade att det färgskiftande vertikalljuset hade positiv inverkan på motivation och välmående, effekten uteblev dock på koncentrationen hos försökspersonerna. Den positiva effekten som skedde var när ordningsföljden av behandlingarna började med det färgskiftande vertikalljuset adderat till arbetsbelysningen och avslutades med behandlingen som endast bestod avarbetsbelysningen. Slutsatsen är att varierande färgad vertikalbelysning kan öka motivationen och välmåendet om det appliceras på rätt sätt, utan att påverka koncentrationen negativt. Den simulerade kontorsmiljön saknade fönster, vid upp skalning av eventuell vidare forskning skulle en verklig kontorsmiljö med fönster vara att preferera. Att undersöka vidare om det är själva variationen av ljusets färger eller de enskilda färgerna på ljuset som skapar effekten hos brukarna ses också relevant, då denna studien inte behandlade det specifikt. / The human being has developed during the daylight's dynamic variation of color temperature, direction and intensity. The variation positively affects our emotions and performance. The problem today is that we stay about 90% of the day indoors and the indoor lighting often lacks variation. With dynamic colored light, a changeable and stimulating environment can be created to improve future lighting environments. This study has examined how the user's motivation, well-being and concentration are affected by dynamic colored vertical lighting. An environment that quickly would become dull and understimulating, can instead get an interesting variation that makes it usable for a longer time with this lighting solution, without the motivation or well-being decreasing. The lighting solution is intended to be used during time periods as a boost. The experiment was divided into two treatments, one with static office lighting designed according to Swedish lighting standard and one where the dynamic colored vertical lighting was added to the regular office lighting. The treatments were performed in a simulated office environment at Jönköpings Tekniska Högskola. The treatment with dynamic colored vertical lighting slowly shifted in light colors through out the whole visible color spectrum on the room's vertical surfaces, to create a variation in the room. During the experiment, the subjects were required to answer questionnaires and performance tests to measure the influence of the dynamic colored light on the subjects well-being and cognitive performance. The results showed that the dynamic colored vertical light had a positive effect on motivation and well-being, but did not affect the concentration of the subjects. The positive effect that occurred was when the order of the treatments started with the dynamic colored vertical light and then ended with the regular working light. The conclusion is that dynamic colored vertical lighting can increase the motivation and well-being if it is applied correctly, without adversely affecting the concentration. The simulated office environment lacked windows, when scaling up any further research, a real office environment with windows would be preferable. Investigating further whether it is the actual variation of the colored light or the individual colors of the light that creates the effect on the users is also relevant, as this study did not specifically process that.

Submitted by Adriana Alves Rodrigues (aalves@espm.br) on 2017-11-23T14:59:03Z No. of bitstreams: 1 ANDREA SILVIA SECURATO.pdf: 2258702 bytes, checksum: ce8b47f8b0a7a37dd282aa762c8f1a49 (MD5) / Approved for entry into archive by Adriana Alves Rodrigues (aalves@espm.br) on 2017-11-23T15:01:08Z (GMT) No. of bitstreams: 1 ANDREA SILVIA SECURATO.pdf: 2258702 bytes, checksum: ce8b47f8b0a7a37dd282aa762c8f1a49 (MD5) / Approved for entry into archive by Ana Cristina Ropero (ana@espm.br) on 2017-12-01T11:21:36Z (GMT) No. of bitstreams: 1 ANDREA SILVIA SECURATO.pdf: 2258702 bytes, checksum: ce8b47f8b0a7a37dd282aa762c8f1a49 (MD5) / Made available in DSpace on 2017-12-01T11:23:10Z (GMT). No. of bitstreams: 1 ANDREA SILVIA SECURATO.pdf: 2258702 bytes, checksum: ce8b47f8b0a7a37dd282aa762c8f1a49 (MD5) Previous issue date: 2017-03-29 / The store environmental factors and their influences on consumption are current and relevant themes, dealt with by much of the academic literature. These factors, divided into auditory, visual, olfactory, tactile, tasteful and social, are presented as the focus of managerial strategies, do to the interferences in the dynamics of attention at the point of sale. This paper seeks to clarify this dynamic, in face of three factors: auditory, visual and social. For that, the variables of music, lighting and crowding and their influences on consumer attention in a simulated supermarket environment were considered. The analysis was carried out in the Retail Lab of the School of Advertising and Marketing with the use of EyeTracking technology to identify the visual attention in front of six varied scenarios. The results point to a positive impact of music of moderate height (ambient sound), as well as influences of the high and natural lighting and acceleration of the decisions of purchase by the density of individuals (crowding). Such results contribute to the academic and managerial knowledge in marketing, with indication of proposals for future studies. / Os fatores ambientais de loja, e suas influências sobre o consumo são temas atuais e relevantes, tratados por grande parte da literatura acadêmica. Estes fatores, divididos em auditivos, visuais, olfativos, táteis, degustativos e sociais apresentam-se como foco das estratégias gerenciais, apresentada as interferências nas dinâmicas de atenção no ponto de venda. Este trabalho busca aclarar esta dinâmica, diante de três dos fatores: auditivo, visual e social. Para tanto, foram consideradas as variáveis de música, iluminação e crowding, e suas influências na atenção do consumidor em ambiente simulado de supermercado. A análise foi realizada no Retail Lab da Escola Superior de Propaganda e Marketing, com o uso da tecnologia Eye Tracking para identificação a atenção visual, diante de seis cenários variados. Os resultados apontam para um impacto positivo de músicas, de altura moderada (som ambiente), bem como influências da iluminação alta e natural, e aceleração das decisões de compra pela densidade de indivíduos, crowding. Tais resultados contribuem para o conhecimento acadêmico e gerencial em marketing, com indicação de propostas para estudos futuros.

Cheung Shuk Han Alice. / "Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 1997-98, design report." / Includes bibliographical references. / Chapter 1. --- Introduction / Chapter 2. --- Strategies (Creation of space in a maturally grown urban context) by changing / modifying the visual perception / Chapter 3. --- Spatial Perception: by induction of the visual elements / Chapter 4. --- My Project / Chapter 5. --- Visualising my mental images (my design method) / Chapter 5.1 --- Making the montage / Chapter 5.2 --- Depicting the notion of Flexibility of the space: Designing the master gallery / Chapter 5.3 --- A montage of a montage: Designing an inter-penetrating space of the libraries / Chapter 5.4 --- Art of articulation: Designing the new entrance of the design centre / Chapter 6. --- Spatial design : building a sequence as a visual reference for reading space / Chapter 6.1 --- The Entrance: the notion of openness / Chapter 6.2 --- The courtyard: the arrival space in day and night / Chapter 6.3 --- The galleries : the window design for individual identity / Chapter 6.4 --- The master gallery: flexible display setting and lighting system for a place of different ideas / Chapter 6.5 --- The libraries : manipulating space with use of materials / Chapter 7 --- Conclusion / Chapter 7.1 --- Space-making by fabricating with light and shadow inside an old building / Chapter 7.2 --- The sense of wholeness of the prescribed spatial sequence / Chapter 7.3 --- Manipulating new space and changing people's passive perception on the existing environment / Chapter 8. --- Reference material / Chapter 9. --- Appendix: / Chapter ´Ø --- copies of presentation panels / Chapter ´Ø --- copy of the programming report

Made available in DSpace on 2016-04-25T16:44:41Z (GMT). No. of bitstreams: 1 Thiago Alves dos Santos.pdf: 2228117 bytes, checksum: f1e8c38014c8f8acae35bbbea66084d7 (MD5) Previous issue date: 2014-09-16 / This paper aims at identifying the influence of variables that make up the layout on the purchase behavior of the consumer, considering the object of this paper, the selling point, its place and retail of bijouterie and accessories. For this, based on a bibliographic search about purchase behavior, the selling point, through the exploratory analysis and an attitudinal instrument, along the collection of data, in order to draw a parallel between the variables that make up the layout of the store and purchase behavior of consumers. It was concluded that all the variables that constitute the layout of retail store influence the purchase behavior of the consumer, including the colors, the lighting and the visual and physical accessibility of the product / Este estudo teve como objetivo investigar a influência de variáveis que constituem o layout sobre o comportamento de compra do consumidor, considerando o ponto de venda objeto deste estudo, sua praça e cenário de atuação, ou seja, o varejo de bijuterias e acessórios. Para tanto, utilizou-se a pesquisa bibliográfica e a análise ambiental de uma loja específica e de seu ponto de venda, a análise ambiental de cunho exploratório, utilizou-se de um instrumento atitudinal ao longo da coleta de dado, a fim de traçar um paralelo entre as variáveis que compõem o layout da loja e o comportamento de compra do consumidor. Concluiu-se que todas as variáveis que constituem o layout exercem influência sobre o comportamento de compra do consumidor, entre elas as cores, a iluminação e a acessibilidade visual e física do produto

Ces dernières années, la biométrie a fait l’objet d’une grande attention en raison du besoin sans cesse croissant d’authentification d’identité, notamment pour sécuriser de plus en plus d’applications enlignes. Parmi divers traits biométriques, le visage offre des avantages compétitifs sur les autres, e.g., les empreintes digitales ou l’iris, car il est naturel, non-intrusif et facilement acceptable par les humains. Aujourd’hui, les techniques conventionnelles de reconnaissance faciale ont atteint une performance quasi-parfaite dans un environnement fortement contraint où la pose, l’éclairage, l’expression faciale et d’autres sources de variation sont sévèrement contrôlées. Cependant, ces approches sont souvent confinées aux domaines d’application limités parce que les environnements d’imagerie non-idéaux sont très fréquents dans les cas pratiques. Pour relever ces défis d’une manière adaptative, cette thèse porte sur le problème de reconnaissance faciale non contrôlée, dans lequel les images faciales présentent plus de variabilités sur les éclairages. Par ailleurs, une autre question essentielle vise à profiter des informations limitées de 3D pour collaborer avec les techniques basées sur 2D dans un système de reconnaissance faciale hétérogène. Pour traiter les diverses conditions d’éclairage, nous construisons explicitement un modèle de réflectance en caractérisant l’interaction entre la surface de la peau, les sources d’éclairage et le capteur de la caméra pour élaborer une explication de la couleur du visage. A partir de ce modèle basé sur la physique, une représentation robuste aux variations d’éclairage, à savoir Chromaticity Invariant Image (CII), est proposée pour la reconstruction des images faciales couleurs réalistes et sans ombre. De plus, ce processus de la suppression de l’ombre en niveaux de couleur peut être combiné avec les techniques existantes sur la normalisation d’éclairage en niveaux de gris pour améliorer davantage la performance de reconnaissance faciale. Les résultats expérimentaux sur les bases de données de test standard, CMU-PIE et FRGC Ver2.0, démontrent la capacité de généralisation et la robustesse de notre approche contre les variations d’éclairage. En outre, nous étudions l’usage efficace et créatif des données 3D pour la reconnaissance faciale hétérogène. Dans un tel scénario asymétrique, un enrôlement combiné est réalisé en 2D et 3D alors que les images de requête pour la reconnaissance sont toujours les images faciales en 2D. A cette fin, deux Réseaux de Neurones Convolutifs (Convolutional Neural Networks, CNN) sont construits. Le premier CNN est formé pour extraire les descripteurs discriminants d’images 2D/3D pour un appariement hétérogène. Le deuxième CNN combine une structure codeur-décodeur, à savoir U-Net, et Conditional Generative Adversarial Network (CGAN), pour reconstruire l’image faciale en profondeur à partir de son homologue dans l’espace 2D. Plus particulièrement, les images reconstruites en profondeur peuvent être également transmise au premier CNN pour la reconnaissance faciale en 3D, apportant un schéma de fusion qui est bénéfique pour la performance en reconnaissance. Notre approche a été évaluée sur la base de données 2D/3D de FRGC. Les expérimentations ont démontré que notre approche permet d’obtenir des résultats comparables à ceux de l’état de l’art et qu’une amélioration significative a pu être obtenue à l’aide du schéma de fusion. / In recent years, biometrics have received substantial attention due to the evergrowing need for automatic individual authentication. Among various physiological biometric traits, face offers unmatched advantages over the others, such as fingerprints and iris, because it is natural, non-intrusive and easily understandable by humans. Nowadays conventional face recognition techniques have attained quasi-perfect performance in a highly constrained environment wherein poses, illuminations, expressions and other sources of variations are strictly controlled. However these approaches are always confined to restricted application fields because non-ideal imaging environments are frequently encountered in practical cases. To adaptively address these challenges, this dissertation focuses on this unconstrained face recognition problem, where face images exhibit more variability in illumination. Moreover, another major question is how to leverage limited 3D shape information to jointly work with 2D based techniques in a heterogeneous face recognition system. To deal with the problem of varying illuminations, we explicitly build the underlying reflectance model which characterizes interactions between skin surface, lighting source and camera sensor, and elaborate the formation of face color. With this physics-based image formation model involved, an illumination-robust representation, namely Chromaticity Invariant Image (CII), is proposed which can subsequently help reconstruct shadow-free and photo-realistic color face images. Due to the fact that this shadow removal process is achieved in color space, this approach could thus be combined with existing gray-scale level lighting normalization techniques to further improve face recognition performance. The experimental results on two benchmark databases, CMU-PIE and FRGC Ver2.0, demonstrate the generalization ability and robustness of our approach to lighting variations. We further explore the effective and creative use of 3D data in heterogeneous face recognition. In such a scenario, 3D face is merely available in the gallery set and not in the probe set, which one would encounter in real-world applications. Two Convolutional Neural Networks (CNN) are constructed for this purpose. The first CNN is trained to extract discriminative features of 2D/3D face images for direct heterogeneous comparison, while the second CNN combines an encoder-decoder structure, namely U-Net, and Conditional Generative Adversarial Network (CGAN) to reconstruct depth face image from its counterpart in 2D. Specifically, the recovered depth face images can be fed to the first CNN as well for 3D face recognition, leading to a fusion scheme which achieves gains in recognition performance. We have evaluated our approach extensively on the challenging FRGC 2D/3D benchmark database. The proposed method compares favorably to the state-of-the-art and show significant improvement with the fusion scheme.

The implementation of energy policies oriented to incentive the adoption of efficient lighting technologies in the residential sector requires analytic tools able to describe the market conditions necessary for a successful penetration of the innovations. This article describes, using an agent-based model, the relationship between the micro behaviors of householder\'s adoption of lighting technologies and the aggregated macro patterns of diffusion in the Brazilian residential sector. The model also studies the dynamic between the interaction network parameters and the emerging diffusion characteristics in different economic scenarios for energy and technologic prices / A implementação de políticas públicas orientadas a incentivar a adopção de tecnologias de iluminação mais eficientes no setor residencial precisa de ferramentas analíticas capazes de descrever assertivamente as condições de mercado necessárias para uma penetração exitosa destas inovações. Este documento descreve, utilizando modelagem baseado em agentes, a relação entre os micro comportamentos dos usuários ao adotar as tecnologias de iluminação e as macro tendências agregadas de difusão no setor residencial brasileiro. O modelo também estuda a dinâmica existente entre a relação dos parâmetros das redes de interação e as caraterísticas emergentes no processo de difusão em diferentes cenários econômicos para os custos energéticos e tecnológicos.

Hong Ka Yu Garret. / "Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 2004-2005, design report."

The Atlantic salmon (Salmo salar) lifecycle is punctuated by distinct ontogenic stages which are routinely manipulated commercially by photoperiod regimes to enable year-round production. As such, light plays a critical role throughout the production cycle, however, it remains poorly characterised and light spectrum and intensity have not been defined optimally yet. This thesis was therefore set out to test the effects of narrow bandwidth light (Blue-λ(max) 444 nm, Green-λ(max) 523 nm, Red-λ(max) 632 nm and White) and intensity in freshwater (FW). Fry-parr development, out-of-season smoltification and ocular and vertebral health were examined as was the long-term effects of FW light regimes on seawater (SW) growth and muscle structure. In addition, the impact of photoperiod regimes on out-of-season smolts following transfer to SW was investigated. 
 Major findings from the trials conducted show that light spectrum and intensity influence parr development with lower intensities performing better than higher intensities. Both the initiation and duration of smoltification was impacted by spectrum. Importantly, this doctoral work showed that daily changes in light intensity, from low during the scotophase to high during the photophase applied for the duration of a standard out-of-season smoltification regime was capable of providing a sufficient cue for the induction of smoltification. Historic FW light exposure impacted SW performance and post-transfer SW photoperiod had significant impact upon growth and maturation development. Results based on changes to the gonadosomatic index provide important guidance for suitable post-transfer photoperiods for smolt transferred to SW around the winter solstice. Importantly, from the parameters tested, exposure to different spectrum or light intensities did not adversely affect vertebral or ocular health. 
 This thesis did not only focus on the physiological effects of light but also aimed to characterise better the pathways involved in light perception and integration. To do so, the neural response to both broad spectrum white light, darkness and Red and Blue light was investigated through deep brain insitu-hybridisation and high throughput sequencing (NGS) of the pituitary gland. Results showed substantial spectral and light/dark changes in the both the deep brain and pituitary transcriptome. Overall, this research provides both scientifically interesting and commercially relevant guidance for the optimisation of lighting systems for use in captive salmon aquaculture. Major findings from the trials conducted show that light spectrum and intensity influence parr development with lower intensities performing better than higher intensities. Both the initiation and duration of smoltification was impacted by spectrum. Importantly, this doctoral work showed that daily changes in light intensity, from low during the scotophase to high during the photophase applied for the duration of a standard out-of-season smoltification regime was capable of providing a sufficient cue for the induction of smoltification. Historic FW light exposure impacted SW performance and post-transfer SW photoperiod had significant impact upon growth and maturation development. Results based on changes to the gonadosomatic index provide important guidance for suitable post-transfer photoperiods for smolt transferred to SW around the winter solstice. Importantly, from the parameters tested, exposure to different spectrum or light intensities did not adversely affect vertebral or ocular health. This thesis did not only focus on the physiological effects of light but also aimed to characterise better the pathways involved in light perception and integration. To do so, the neural response to both broad spectrum white light, darkness and Red and Blue light was investigated through deep brain insitu-hybridisation and high throughput sequencing (NGS) of the pituitary gland. Results showed substantial spectral and light/ dark changes in the both the deep brain and pituitary transcriptome. Overall, this research provides both scientifically interesting and commercially relevant guidance for the optimisation of lighting systems for use in captive salmon aquaculture.