Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2007. / Includes bibliographical references (leaves 63-66). Also available in electronic version.

I takt med att e-handeln växer sig större behöver fysiska butiker blir allt mer upplevelseinriktad och leverera unika kundupplevelser för att inte mista sina kunder. Ljus och belysning är en viktig komponent för att påverka kundupplevelse, eftersom ljus direkt påverkar komfort och navigering i butiken. För att skräddarsy belysning för en specifik butik krävs expertis från en ljusdesigner. Finjusteringar av belysning på plats i butiken kan dock vara en utmaning även för ljusdesigners på grund av tidsbegränsning, mängden fel som kan uppstå i ljusinstallationen och avsaknaden av effektiva verktyg för att justera olika aspekter av ljus. Denna studie syftar till att förstå om ett mobilt verktyg för att justera ljusets färgtemperatur i realtid kan hjälpa en ljusdesigner vid installationen av belysning i en butik. För att förstå de utmaningar som är involverade i ljusdesigners arbete har två metoder använts. En deltagande observationsstudie och semistrukturerade intervjuer med tre ljusdesigners. Med kunskap från dessa metoder utfördes ett användarstudie där två versioner av en mobilapplikation för justera ljus testades. Detta utfördes för att dels undersöka användningen av en befintlig applikation och för att identifiera vilka element i den här typen av verktyg som är viktiga för en ljusdesigner. Denna studie indikerade att ett sådant mobilverktyg kan vara mycket användbart, men endast om det innehåller alla nödvändiga element som behövs för att finjustera en ljusinstallation. Studien visade även att en av de viktigaste komponenterna av ett sådant mobilt verktyg är möjligheten att justera färgtemperaturen på ljus, särskilt när man skapar belysning specifikt för en butik. En designövning utfördes för att undersöka hur användbara befintliga verktyg för att justera färgtemperatur är och hur sådana verktyg kan utformas för att passa en ljusdesigners behov. Baserat på resultatet av denna övning skapades en prototyp på ett verktyg för att justera färgtemperaturen av ljus. Denna prototyp utvärderades genom en formativ användarstudie samt ett frågeformulär för att utvärdera ett systems användbarhet. Enligt resultatet av testet uppfattades prototypen vara användbar. Sammantaget tyder resultaten från denna studie på att det finns ett behov av denna typ av mobila verktyg som effektivt kan hjälpa ljusdesigner i deras arbete. / With the significant growth of e-commerce, physical stores need to become more experience-driven, and delivering unique, high impact customer experiences is a core for their success. Lighting is an important element of customer experience, as it directly affects comfort and navigation. In order to customize lighting for a store,expertise from a light designer is needed. However, on-site lighting fine tuning is a challenge due to time restrictions, amount of error occurring to the light installation, and easy accessible tools for adjustments. This study aims to understand whether an mobile tool for adjusting color temperature of lights in realtime can assist a light designer when installing a light installation in a retail store. To understand the challenges involved in the work of lightning designers, two methods have been used. A participatory observational study and semistructured interviews with three light designers. Given that, an exploratory user test was performed, testing two versions of a lighting manager application in order to investigate the usage of an existing application and what elements in this kind of tool are of most importance for a light designer. The user tests indicated that a mobile tool like this could be very useful, but only if it contains all the necessary elements needed. The results show that one of the essential elements of such a tool regards options for adjusting color temperature, when creating specifically for a retail store. In order to investigate further how useful existing light color temperature tools are and how they could be designed to suit a light designer needs, a design exercise was performed. Through the result of this exercise a prototype of a color temperature tool was created. This prototype was evaluated through a formative user study. The usability of the prototype was evaluated through a System usability score evaluation questionnaire. According to the test, the prototype was found to be usable. All in all, the results of this study indicate that there is a need for this kind of mobile tools that can effectively assist light designers in their work.

Submitted by Caroline Periotto (carol@ufscar.br) on 2016-09-19T14:02:45Z No. of bitstreams: 1 DissJRRJ.pdf: 9146963 bytes, checksum: d1ca284150548459ecae9a5cf5625c60 (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-20T17:59:09Z (GMT) No. of bitstreams: 1 DissJRRJ.pdf: 9146963 bytes, checksum: d1ca284150548459ecae9a5cf5625c60 (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-20T17:59:15Z (GMT) No. of bitstreams: 1 DissJRRJ.pdf: 9146963 bytes, checksum: d1ca284150548459ecae9a5cf5625c60 (MD5) / Made available in DSpace on 2016-09-20T17:59:22Z (GMT). No. of bitstreams: 1 DissJRRJ.pdf: 9146963 bytes, checksum: d1ca284150548459ecae9a5cf5625c60 (MD5) Previous issue date: 2014-09-29 / Não recebi financiamento / This paper aims to propose the inclusion of the Arduino microcontroller in Physics classes in a public high school. To this intent, a learning situation on the theme Light and Color was suggested, based on meaningful learning and on the use of an interactive and easy to handle experiment. The daily life of students is packed with technologies that hold plenty of Physics’ concepts and applications. The intention to introduce the Arduino microcontroller in Physics classes was to arouse the curiosity and awaken in them the investigative character necessary to the study of Physics while they deal with technological elements that are part of their contemporary culture. The developed activity enables the investigation and allows students to participate more actively in their learning process. During the activity, groups of students tested some possibilities of light mixtures and the relationship between the incident light with the color of the light reflected by the objects. To record and learning verification purposes, a pretest, a posttest, a summative evaluation, teacher’s records and, lastly, a self-assessment were performed. It is possible to conclude that the activity was successful and has awakened the curiosity of the students, enabled conceptual growth and showed evidence of significant learning. / Este trabalho tem como objetivo propor a inserção do microcontrolador Arduino nas aulas de Física do Ensino Médio em uma Escola Púbica. Para isto, foi proposta uma situação de aprendizagem sobre o tema “Luz e Cor”, baseada na aprendizagem significativa, e na utilização de um experimento interativo e de fácil manipulação. O cotidiano dos estudantes está repleto de tecnologias e nelas há uma infinidade de conceitos e aplicações da Física. A intenção ao introduzir o microcontrolador Arduino nas aulas de Física foi provocar curiosidade nos estudantes e despertar o caráter investigativo necessário ao estudo da Física, ao mesmo tempo em que lidam com elementos tecnológicos que fazem parte de sua cultura contemporânea. A atividade desenvolvida possibilita a investigação e permite ao estudante uma participação mais ativa no seu processo de aprendizagem. Durante a atividade, grupos de estudantes testaram algumas possibilidades de misturas da luz e a relação da luz incidente com a cor da luz refletida pelos objetos. Para registro e verificação da aprendizagem, foram realizados um pré-teste, um pós-teste, uma avaliação somativa, registros do professor e, ao final, uma autoavaliação. Concluiu-se que a atividade foi exitosa, despertou a curiosidade dos estudantes, possibilitou crescimento conceitual e apresentou indícios de uma aprendizagem significativa.

Progress in development of modern LEDs, their long lifetime and high luminous efficacy predetermine them for usage in lighting systems. This master's thesis examines possibilities of application of LEDs in luminaires, parameters of diodes and problems, which can appear in construction of luminaire with LED lighting source. In the practical part of this thesis a luminaire is designed, capable of illuminating traffic signs, vertical surfaces, billboards and fasades. By standards required parameters of a lighting system and adaptability of application must be considered in complex predesign. Simulations of lighting scene, created in special computer software, measurements of optical point’s parameters and construction of real luminaire model using high quality CREE LEDs, are included in analysis of the problem. Parameters of the luminaire were proved by measurements of product’s attributes at light laboratory. There are also some suggestions for improvement and further development of the product.