Tests of reinforced concrete beams effect of retention of load

Thesis (B.S.)--University of Illinois, 1905.Includes bibliographical references.Ms

Aplicación de salvaguardias arancelarias y su impacto en el empleo en el sector comercial de electrodomésticos período 2010-2014.

Comercio exteriorEl sector comercial importador de línea blanca es debilitado ante la medida arancelaria propuesta por el gobierno con el fin de estimular el sector como tal, sin embargo, las importadoras tuvieron que despedir a los trabajadores y fugar los capitales ante la medida propuesta. La metodología aplicada es cualitativa y cuantitativa es decir, mixta, con el método bibliográfico, inductivo, analítico y sintético, se obtuvieron los siguientes resultados: el 56% de las empresas importadoras ha tenido compras regulares, mientras que el 44% firman contratos muy frecuentemente, ocasionales, lo que provoca una incertidumbre en el trabajador, donde se puede llegar a la conclusión que es necesario fortalecer las estrategias en el sector para hacer frente a la medida impositiva del gobierno y no desabastecer el stock y provocar un desempleo directo y masivo en el país.The commercial sector importer white line is weakened to the tariff measure proposed by the government in order to stimulate the sector as such, however, importers had to lay off workers and capital leak to the proposed measure. The methodology is qualitative and quantitative ie mixed with the literature, inductive, analytical and synthetic method, the following results were obtained: 56% of the importers has had regular purchases, while 44% sign contracts very often , occasional, causing uncertainty in the worker, where you can conclude that it is necessary to strengthen strategies in the sector to address the tax measure the government and not refusing to supply the stock and cause a direct and massive unemployment in the country

Optimization of a Classical Stamping Progression by Modal Correction of Anisotropy Ears

This work is a development from the Inetforsmep European project. We proposed to realize a global optimization of a deep drawing industrial progression (made of several stages) for a cup manufacture. The objectives of the process were the thickness decrease and the geometrical parameters (especially the height). This paper improves on this previous work in the aim of mastering the contour error. From the optimal configuration, we expect to cut down the amount of the needed material and the number of forming operations. Our action is focused on the appearance of unexpected undulations (ears) located on the rim of the cups during forming due to a nonuniform crystallographic texture. Those undulations can cause a significant amount of scraps, productivity loss, and cost during manufacture. In this paper, this phenomenon causes the use of four forming operations for the cup manufacture. The aim is to cut down from four to two forming stages by defining an optimal blank (size and shape). The advantage is to reduce the cost of the tool manufacturing and to minimize the needed material (by suppressing the part flange). The chosen approach consists in defining a particular description of the ears' part by modal decomposition and then simulating several blank shapes and sizes generated by discrete cosine transformation (DCT). The use of a numerical simulation for the forming operation and the design of an experiment technique allow mathematical links between the ears' formation and the DCT coefficients. An optimization is then possible by using mathematical links. This original approach leads the ears' amplitude to be reduced by a factor of 10, with only 15 numerical experiments. Moreover, we have limited the number of forming stages from 4 to 2 with a minimal material use

Dual Feed, Single Element Antenna for WiMAX MIMO Application

A novel u-shaped single element antenna having two feed ports is compared with two equal length monopoles separated by a distance equivalent to the width. A discussion of relative performance metrics is provided for MIMO applications, and measured data is given for comparison. Good impedance match and isolation of greater than −10 dB are observed over the operating bandwidth from 2.3 to 2.39 GHz. The antenna patterns are highly uncorrelated, as illustrated by computation of the antenna pattern correlation coefficient for the two comparison monopoles