Search results for "colour"

Essential oil components of orange peels and antimicrobial activity

2016

In this study, the orange peel of 12 cultivars of Citrus sinensis from central-eastern Sicily was employed to obtain essential oils and extracts. The ones were extracted through steam distillation, the others through extraction in hexane. Chemical constituents were evaluated in terms of qualitative and quantitative analyses by gas chromatography/mass spectrometry. Fifty-four components were identified in the steam essential oils and 44 in the extracts. In all the cultivars, the main component is d-limonene (73.9–97%); discrete percentages of linalool, geraniol and nerol were also found. Cluster analysis based on essential oils composition showed a certain degree of affinity between cultivar…

Experimental evaluation of plasters durability aimed at maintenance planning and scheduling

2011

The phase of building management has a strategic importance because of the necessary scheduling of maintenance during executive planning. Moreover, in order to obtain the greatest sustainability of the intervention, a reasonable duration of service life must be balanced with global quality-cost ratio. A contribution towards this objective is given by the reduction in the achievable resources and raw materials consumption through the improvement of the durability requirement of building and its parts. This is true even for the interventions on the existing public building stock, especially if there is lacking of maintenance planning and scheduling. This work, taking cues from a maintenance i…

Il colore delle idee

2018

The myth of white in architecture has ancient roots partially sprouting from a classic ideal revived by modernism that now seems to acquire new values. Also in light of its current global dissemination – from the US to Europe and Japan – white architecture cannot be considered as a fad, nor can it be reduced to a mere Mediterranean character. Fran Silvestre Arquitectos’ production exemplifies the complexity of this phenomenon with its presence in the contemporary international scene and a range of works, mostly housing designs, of remarkable quality. The trajectory illustrated in this book partially results from the re-reading of the modern as well as Mediterranean architectural tradition, …

The colour to knows the project ideas. The drawings of Giuseppe Damiani Almeyda

2012

Giuseppe Damiani Almeyda is insert into a historical context in which the issue of colour is living a phase of discovery and awareness. Author of numerous architectural works of international attention, arrives in Palermo in 1859, first like engineering of Civil Engineering to become a professor at the Faculty of Engineering. In the XIX century a lot of researchers of psychology, physics, optics, art and architecture are involved in meticulous research that could explain the reasons of colour, its alteration, the complementary compositions, the diagrams, the optical cones, its applications in the Greek and Roman culture. Thus, high-sounding names such as Thomas Young, James Clerk Maxwell, W…

Perceived and measured colour attributes under different sources

2014

Indoor lighting quality: Effects of different wall colours

2016

This paper reports the results of measurements performed in a test room to investigate the impact of using different wall colours and light scenes on indoor lighting quality. Eye level spectral irradiances were measured for a user located inside the room and seated at a desk. These measurements allow the use of the Irradiance Toolbox, which makes it possible to calculate equivalent illuminances for the photopigments in the human eye. Moreover, the CIECAM02 colour appearance model was used to investigate the variations in hue and chroma values of the different wall colours when changing the light scene. The results demonstrate that there are significant variations in eye level spectral irra…

Colours and building thermal balance: the impact of coating colour on energy loads

2013

Analisys on the feasibility to modulate lighting systems load: the case study of Palermo

2022

The feasibility to shift and/or modulating the loads that characterize buildings can be useful to improve the performance of smart grids. As known, it is not possible to shift in the time the operating time of the lighting system, but it is possible to modulate the needed electric power. In this paper, the first set of data and a preliminary analysis conducted in the Solarlab of the University of Palermo are presented. The innovative lighting system was designed, sized and installed with the aim of evaluating the consumption of an island user that can be controlled by the DSO or an aggregator. In order to do this, the lighting system load was modulated by applying different strategies: vary…

Il colore ‘blu’ nel medioevo frisone: afris. wēden, wēdan, wēdin

2022

The colour words have always been a fascinating topic of study for scholars of various disciplines, including linguists, philologists, psychologists, philosophers and anthropologists. A survey of the occurrences of the Old Frisian word wēden, wēdan, wēdin (cf. OE wǣden, OHG weit, presumably stemming from a Gmc *waizda-, waidīna-, a root meaning ‘woad, plant yielding blue dye’), might allow us to specify the various semantic fields covered by this lexeme, as well as the relevant contexts of use.

Automatic differentiation of melanoma from dysplastic nevi.

2015

International audience; Malignant melanoma causes the majority of deaths related to skin cancer. Nevertheless, it is the most treatable one, depending on its early diagnosis. The early prognosis is a challenging task for both clinicians and dermatologist, due to the characteristic similarities of melanoma with other skin lesions such as dysplastic nevi. In the past decades, several computerized lesion analysis algorithms have been proposed by the research community for detection of melanoma. These algorithms mostly focus on differentiating melanoma from benign lesions and few have considered the case of melanoma against dysplastic nevi. In this paper, we consider the most challenging task a…