Hollow slabs are of reinforced concrete in which voids allow the to be reduced size. This type slab results raw materials Consumption and increased insulating properties achieve sustainability goals. paper reported an experimental research program focused on study bending behaviour elements hollow normal-strength concrete. Three models one-way were cast, It had dimensions 1020 mm length, 420 wi...

the regioselective ring opening of styrene oxide using elemental iodine and bromine in the presence of disulfides as new catalysts was studied. the conductivity titration and uv spectroscopy were used to study the interaction of iodine with these catalysts. the results indicate that disulfide 11 is efficient in polyiodide formation, and can catalyze this reaction in excellent yield and high reg...

The European Union has made the development of a circular economy one central ambitions its Green Deal, in which plastics are defined priority. Current policies, however, have drawn criticism that narrow focus on techno-innovation opportunities and economic growth falls short addressing multifaceted socio-ecological challenges, overlooks trade-offs between proposed solutions, conceals conflicts...

a. Witness Professor Reyntjens (PW77) asked permission to address the Chamber. First, he advised the Chamber that he had made an error in an answer he had given yesterday and offered further explanations. Second, he advised the Chamber that he had been given documents yesterday by Counsel for Bagosora (Mr. Constant), some of which were stamped “confidential” and which he recognized as being doc...

an efficient and simple method for the preparation of si-imidazole-hso4 functionalized magnetic fe3o4 nanoparticles (si-im-hso4 mnps) and used as an efficient and reusable magnetic catalysts for the regioselective ring opening of epoxides under green conditions in water. this catalyst was used for the ring opening of epoxide corresponding to the thiocyanohydrins and azidohydrines. compared to t...

The problem of determining the values of the independent variable given a value of the dependent variable is commonly referred to as the inverse regression problem. This problem is also encountered in real life with circular data and we refer to it in that context as the inverse circular regression problem. For such a problem, we develop distance-basedmethods, and parametric methods, where we u...

In this paper, a class of extended lower and upper levelings is investigated. Here, some conditions are imposed to the criteria for building extended lower and upper levelings in order to generate openings and closings with reconstruction criteria. The idea of building these new openings and closings comes from the notions of morphological filters by reconstruction and levelings. The main goal ...

This paper analyzes the impact of international trade on the quality of institutions, such as contract enforcement, property rights, or investor protection. It presents a model in which institutional differences play two roles: they create rents for some parties within the economy, and they are a source of comparative advantage in trade. Institutional quality is determined as an equilibrium of ...