Search results for "lighting"
showing 10 items of 140 documents
Ritrattare la metafisica?
2016
L'articolo discute alcune interpretazioni del libro di L. Samonà, Ritrattazioni della metafisica, mettendo in rilievo lo sfondo ontologico della fenomenologia ermeneutica e il carattere dialettico interno alla dimostrazione per via di confutazione del principio inconcusso
Luci e ombre sulla piazza. Cicliche trasformazioni di uno spazio pubblico
2010
Con questo articolo intendo mostrare quali possano essere le interazioni che intercorrono tra due elementi fondamentali dello spazio urbano, il suolo e l’illuminazione, nel definire il senso di un luogo. Generalmente considerate due presenze “ovvie”, quanto meno scarsamente problematiche se non a livello di mera funzionalità pratica (soprattutto nel caso della pavimentazione) in questo lavoro vengono considerate come elementi fondanti del funzionamento semiotico dello spazio urbano. Con l’esame di un caso, quello di un’importante piazza della città di Palermo, piazza Politeama, voglio dimostrare come le condizioni di illuminazione e l’organizzazione del suolo di un preciso luogo siano in gr…
Evaluation of Daylight Availability for Energy Savings.
2015
Dynamic daylight simulations are very useful instruments in daylighting design process. They allow an in depth analysis of indoor daylight availability levels and define if they are adequate to perform a particular visual task. Their results can be used to design shading devices or lighting control systems and compare different technical solutions. The use of these simulations is likely to spread in the common design practice since some regulations and green building rating systems suggest their use. This paper presents dynamic daylight simulation results related to an open-plan office, performed with Autodesk 3ds Max Design ® , which is a calculation software validated by recent researches…
Solid-State Lighting: Simple, Fast, Bright, and Stable Light Sources (Adv. Mater. 7/2012)
2012
The colour of light for urban spaces
2013
Light in urban spaces was first introduced to prevent crimes against both people and properties and, while there is no study that confirms crimes' reduction in lit spaces, it is undeniable that people feel safer in lit urban spaces. Over the years it became evident that light can also improve the liveability of cities and enhance their characteristics, therefore in the last years a growing attention was paid to urban lighting design taking into account the environmental impact and energy saving requirements too. The will to use the lighting design project to improve the liveability of historical centres it’s clear: the city during the night is no more conceived like a sum of lit architectur…
Bases moleculares de la actividad señalizadora de dUTPasas
2016
Tesis doctoral: 356 páginas
Estudios estructurales y funcionales de dUTPasas, una amplia familia de enzimas metabólicas con funciones reguladoras
2023
El dUTP es el nucleótido no canónico mayoritario en la célula. Su errónea incorporación en el ADN dispara los sistemas de reparación, los cuales pueden causar la muerte celular por una actuación ininterrumpida. Con el objetivo de prevenir esta situación, y conocida la incapacidad de las ADN polimerasas de distinguir entre el dTTP y el dUTP, las células poseen las proteínas dUTPasas (Duts), capaces de degradar este nucleótido no canónico y, en consecuencia, aumentar la ratio dTTP/dUTP en el pool de nucleótidos celular. A parte de la hidrólisis del dUTP, las Duts poseen otras funciones moonlighting, entre las cuales destaca la capacidad de Duts de fagos de Staphylococcus aureus de interaccion…
Fashion versus perception: the impact of surface lightness on the perceived dimensions of interior space.
2011
Objectives: We compare expert opinion with perceptual judgment regarding the influence of color on the perceived height and width of interior rooms. Background: We hypothesize that contrary to popular belief, ceiling and wall lightness have additive effects on perceived height, whereas the lightness contrast between these surfaces is less important. We assessed the intuitions of architectural experts as to which surface colors maximize apparent height and compared these intuitions with psychophysical height and width estimates for rooms differing in ceiling, floor, and wall lightness. Method: Experiment 1 was a survey of architectural experts and nonexperts. Experiments 2 and 3 presented v…
Direct assessment of the sensitivity drift of SQM sensors installed outdoors
2021
Long-term monitoring of the evolution of the artificial night sky brightness is a key tool for developing science-informed public policies and assessing the efficacy of light pollution mitigation measures. Detecting the underlying artificial brightness trend is a challenging task, since the typical night sky brightness signal shows a large variability with characteristic time scales ranging from seconds to years. In order to effectively isolate the weak signature of the effect of interest, determining the potential long term drifts of the radiance sensing systems is crucial. If these drifts can be adequately characterized, the raw measurements could be easily corrected for them and transfor…
Development of a High Irradiance LED Configuration for Small Field of View Motion Estimation of Fertilizer Particles
2015
International audience; Better characterization of the fertilizer spreading process, especially the fertilizer pattern distribution on the ground, requires an accurate measurement of individual particle properties and dynamics. Both 2D and 3D high speed imaging techniques have been developed for this purpose. To maximize the accuracy of the predictions, a specific illumination level is required. This paper describes the development of a high irradiance LED system for high speed motion estimation of fertilizer particles. A spectral sensitivity factor was used to select the optimal LED in relation to the used camera from a range of commercially available high power LEDs. A multiple objective …