University of Crete

About: University of Crete is a education organization based out in Rethymno, Greece. It is known for research contribution in the topics: Population & Galaxy. The organization has 8681 authors who have published 21684 publications receiving 709078 citations. The organization is also known as: Panepistimio Kritis.

Neurotoxic effect of active ingredients in sunscreen products, a contemporary review

Abstract: Sunscreen application is the main strategy used to prevent the maladies inflicted by ultraviolet (UV) radiation Despite the continuously increasing frequency of sunscreen use worldwide, the prevalence of certain sun exposure-related pathologies, mainly malignant melanoma, is also on the rise In the past century, a variety of protective agents against UV exposure have been developed Physical filters scatter and reflect UV rays and chemical filters absorb those rays Alongside the evidence for increasing levels of these agents in the environment, which leads to indirect exposure of wildlife and humans, recent studies suggest a toxicological nature for some of these agents Reviews on the role of these agents in developmental and endocrine impairments (both pathology and related mechanisms) are based on both animal and human studies, yet information regarding the potential neurotoxicity of these agents is scant In this review, data regarding the neurotoxicity of several organic filters: octyl methoxycinnamate, benzophenone-3 and -4, 4-methylbenzylidene camphor, 3-benzylidene camphor and octocrylene, and two allowed inorganic filters: zinc oxide and titanium dioxide, is presented and discussed Taken together, this review advocates revisiting the current safety and regulation of specific sunscreens and investing in alternative UV protection technologies

Minimization of Timed Transition Systems

Abstract: 15 For a formula = 93 c , the algorithm is the same; the initial partition now distinguishes between the cases ~ x0] = 0 and 0 < ~ x0] c and 0 < ~ x0] 6 6 c. The analysis for = 83 c is similar; the initial partition now needs to account for the progressiveness assumption also (as in the case of 83). Automatic veriication of nite-state concurrent systems using temporal-logic speciications. 14 certain sets of regions. In particular, these constraints require that for every clock i, the constraint ~ xi] = 0 or ~ xi] > c i holds at innnitely many regions along the path (here, c i is the largest constant in a constraint involving x in the enabling conditions of G). We can use this fact to handle progressiveness in our reduced region graphs.

Color and texture image retrieval using chromaticity histograms and wavelet frames

Abstract: In this paper, we explore image retrieval mechanisms based on a combination of texture and color features. Texture features are extracted using Discrete Wavelet Frames (DWF) analysis, an over-complete decomposition in scale and orientation. Two-dimensional (2-D) or one-dimensional (1-D) histograms of the CIE Lab chromaticity coordinates are used as color features. The 1-D histograms of the a, b coordinates were modeled according to the generalized Gaussian distribution. The similarity measure defined on the feature distribution is based on the Bhattacharya distance. Retrieval benchmarking is performed over the Brodatz album and on images from natural scenes, obtained from the VisTex database of MIT Media Laboratory and from the Corel Photo Gallery. As a performance indicator recall (relative number of correct images retrieved) is measured on both texture and color separately and in combination. Experiments show this approach to be as effective as other methods while computationally more tractable.