منابع مشابه
Microanalysis Characterization of Ancient Stained Glasses
The scanning electron microscopy (SEM) technique combined with an EDXRS system has been applied to the study of ancient glasses, to determine whether repairs have been carried out or substitutions made of damaged parts [1]. In this work, we exploit image processing technique in order to enhance the SEM digital image, to improve its readability and, therefore, the identification of significant d...
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Raman micro/macro-spectroscopy allows for a non-destructive remote analysis: body and glaze, crystalline and amorphous phases can be identified, including the nanosized pigments colouring the glaze. Last generation instruments are portable which allows for examination in museum, on sites, etc. This paper gives an overview on the potential of Raman spectrometry technique to analyze ancient ceram...
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in spite of rapid advances in keratorefractive surgery in recent decades, the most common method for refractive error correction throughout the world is glasses, the discovery of which is attributed to the persians. other advantages include protection of the eye against trauma and radiations, correction of phorias and tropias and cosmetic reasons. the purpose of this article is to describe and ...
متن کاملGauge Theories, Spin Glasses and Real Glasses
In this talk I will show that usual spin glasses are a peculiar kind of Abelian gauge theory. I will shortly review the techniques used to study them. At the end I will consider more general models (e.g. spin glasses based on non Abelian gauge group) and I will discuss the relevance of these models to real glasses. Finally I will derive from first principles a generalised Vogel-Fulcher law for ...
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E ver since Vincent Knapp published his 1999 article ‘‘How old is Endometriosis?’’ (1), there seems to have been renewed interest in identifying just when endometriosis was discovered as a distinct disease entity. While the history of endometriosis subsequent to its 1860 microscopic unveiling by Karl von Rokitansky has been well-studied, its story leading up to that moment has remained largely ...
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ژورنال
عنوان ژورنال: Nature
سال: 1962
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1961022b0