منابع مشابه
Intramolecular Pancake Bonding in Helical Structures.
We show that diradicaloid helical conjugated molecules can display strong through-space bonding interactions. These interactions are analogous to π-stacking pancake bonding widely observed for dimers and other aggregates of stable π-conjugated radicals. We show that these multicenter interactions can have a significant stabilizing effect, but they depend in subtle ways on the specific overlap a...
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Background Postpartum Bonding Questionnaire (PBQ) is a remarkable tool to assess impairments in the mother-infant bonding. The purpose of the present study was to review the factorial structure of the PBQ cross different versions. Materials and Methods The search strategy was implemented on databases of Medline (via PubMed), Scopus, Cochran library and Web of Science through electronic database...
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This paper proposes a GA-based reduced search space technique (GA-RSS) for the optimal design of steel moment frames. It tries to reduce the computation time by focusing the search around the boundaries of the constraints, using a ranking-based constraint handling to enhance the efficiency of the algorithm. This attempt to reduce the search space is due to the fact that in most optimization pro...
متن کاملMathematical Structures of Space-time * Mathematical Structures of Space-time
At first we introduce the space-time manifold and we compare some aspects of Riemannian and Lorentzian geometry such as the distance function and the relations between topology and curvature. We then define spinor structures in general relativity, and the conditions for their existence are discussed. The causality conditions are studied through an analysis of strong causality, stable causality ...
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Objective: Microleakage has always been a problem in restorative dentistry. To decrease microleakage, modern bonding systems, different application methods and sandwich technique have been recommended. The purpose of this study was to assess the microleakage in class V cavities restored with open sandwich technique using self-etch and total-etch bonding systems. Methods: In this in vitro st...
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ژورنال
عنوان ژورنال: Journal of The Adhesion Society of Japan
سال: 2001
ISSN: 0916-4812,2187-4816
DOI: 10.11618/adhesion.37.444