1,721,048 research outputs found
Luce ed illuminazione
No full textIl seminario è destinato agli studenti del corso di laurea in Ottica ed Optometria. Illuminare significa rendere visibile il mondo che ci circonda, attraverso un uso sapiente di sorgenti, sia naturali che artificiali. Sono trattate le interazioni tra luce, materiali e percezione umana
"Lighting design in the LED era" "Lighting for artworks"
No full textLectures about: 1) lighting design principles and how lighting has changed with the LED spread. 2) Lighting for cultural heritage: damage produced by light exposure as a function of sensitivity, light for improve artwork's perception and visualization
Good places to live and sleep well: A literature review about the role of architecture in determining non‐visual effects of light
No full text: Light plays a crucial role in affecting the melatonin secretion process, and consequently the sleep-wake cycle. Research has demonstrated that the main characteristics of lighting affecting the so-called circadian rhythms are spectrum, light levels, spatial pattern and temporal pattern (i.e., duration of exposure, timing and previous exposure history). Considering that today people spend most of their time in indoor environments, the light dose they receive strictly depends on the characteristics of the spaces where they live: location and orientation of the building, dimensions of the windows, presence of external obstructions, geometric characteristics of the space, optical properties of walls and furniture. Understanding the interaction mechanism between light and architecture is fundamental to design non-visually comfortable spaces. The goal of the paper is to deepen this complex issue. It is divided into two parts: a brief historical excursus about the relationship between lighting practice and architecture throughout the centuries and a review of the available research works about the topic. The analysis demonstrates that despite the efforts of the research, numerous open questions still remain, and they are mostly due to the lack of a shared and clear method to evaluate the effects of lighting on circadian rhythm regulation
Valutazione comparativa dell'efficacia di due agenti antimicrobici nell'inibizione di macchie estrinseche, placca e infiammazione
No full textLighting in educational environments: An example of a complete analysis of the effects of daylight and electric light on occupants
No full textLight induces not only visual responses but also non-visual effects, indeed it affects performance, mood, attention and influences the synchronization of the biological clock. Duration, timing, intensity and the spectral power distribution of the light that reaches the eyes can have influence on human circadian rhythm and consequently on health. Given the important impact of the non-visual responses on people wellbeing, developing a model that allows lighting designers to predict them is a fundamental goal.In this paper a case study is reported: a series of measurements were carried out in a University classroom in order to study daylight and electric light characteristics and also their impact on the human circadian system by calculating melatonin suppression. The results obtained show that not only the intensity but also the SPD of the light received by the eyes plays a significant role on circadian response and the spectral characteristics of internal and external surfaces influence the SPD and therefore the CCT of the light that hits the eyes. Although the working behavior of the human circadian system is not completely understood, the results obtained give the designers new points of view to better evaluate lighting quality and its implications in indoor environment
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