1,721,028 research outputs found
The effects of the careless use due the standard r-table on the design of lighting installation
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Response of Printing Coloured Ink to Light Exposure Measurement and Analysis
No full textEvery material changes its colours if it is exposed to light for much time: this event is called photo-damage. The effect depends on the energy and the spectral power distribution of the incident radiation and also on the proprieties to absorb the light and change with it of the receiving material. A new measure is proposed in order to quantify these proprieties. The relative spectral responsivity s(λ)dm,rel indicates how much a monochromatic radiation centred on wavelength λ contributes at the photo-damage in a specific materials. In this paper a procedure to measure the relative spectral responsivity of coloured material is described and results on printing inks are presented. The knowledge of the relative spectral responsivity s(λ)dm,rel is helpful to define the ideal spectral emission of the light source which should light an art work with the aim of preserving its colours
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Pediatric Ocular Health and Obstructive Sleep Apnea Syndrome: A Review
Full text linkObstructive sleep apnea (OSA) affects neurobehavioral, cognitive, and cardiovascular aspects, particularly in children, by obstructing the upper airways during sleep. While its impact in adult ocular health is recognized, there is ongoing debate about OSA’s relevance in pediatrics. This review explores the relationship between OSA and ocular health in children, focusing on the effects and potential improvements through treatment. A systematic search found 287 articles through PubMeD/MEDLINE, Scopus, Web of Science, and ScienceDirect; 94.4% were excluded. After careful selection, six English articles were included, addressing the effects of OSA on children’s eyes. Three studies examined choroidal alterations, three explored retinal and optic nerve changes, and two analyzed ocular changes following otorhinolaryngological intervention. The immediate correlation in children is inconclusive, but age may be a contributing factor. Pediatric OSA patients exhibit corneal anomalies and increased optic nerve thickness, possibly due to intermittent hypoxia. OSA influences retinal vascular density in children, with increased density after treatment and reduced choroidal thickness in cases of adenotonsillar hypertrophy. This review emphasized OSA’s significant impact on children’s ocular health, revealing alterations in the optic nerve, choroid, retina, and cornea. While the direct correlation with the optic nerve is not always evident, OSA raises intraocular pressure and induces structural changes. Treatment holds promise, highlighting the need for regular monitoring to promptly address childhood OSA
New lighting system for the original painting of Tintoretto in "Scuola Grande di San Rocco"
No full textThe design process of a lighting system for an arch
itectural space as an art museum or a monument is a very complex matter, because there are many aspects to be considered above the basic conservation prescriptions. Optimal
colour rendition, getting closer to the historical original appearance of the work of art, reducing to minimum levels glare
surface effects and assuring the visual comfort to the observer, are all important requirements to be satisfied. Besides, technical is sues as electrical power dissipation and maintenance of the system are not to be underestimated. The present paper describes the preliminary analyses developed to support the new lighting system design of the Sala dell'Albergo in the
Scuola Grande di San Rocco in Venice. In particular, the focus is
oriented to describing the methodology used for col
orimetric data acquisition of some representative paintings. These data are expected to be helpful in guiding the lighting
sources selection within the lighting design process
How time evolution of road surface properties affect the performance of a lighting system
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