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Open Journal of Applied Sciences 2012年第4期2卷 108-111页

作者： Sérgio Galdino polytechnic school of pernambuco university rua benfica 455 - Madalena 50.750-470 - Recife - PE - Brazil

We present an overview of approaches to selfvalidating?one-dimensional integration quadrature formulas and?a verified numerical integration algorithm with an adaptive?strategy. The new interval integration adaptive algorithm delivers?a desired integral enclosure with an error bounded by a specified?error bound. The adaptive technique is usually much more?efficient than Simpson’s rule and narrow interval results can?be reached.

关键词： Interval computing self-validating methods numerical integration & interval arithmetic

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Indicators Benchmarking of Cement-Based Construction Technologies: Brazilian Case Study

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Open Journal of Civil Engineering 2014年第4期4卷 301-310页

作者： Alberto Casado Lordsleem Junior Barbara Eloa Goncalves de Lima Department of Civil Engineering Polytechnic School of Pernambuco UniversityRecifeBrazil

The adoption of performance indicators promotes knowledge of quantitative and qualitative material wastes in businesses and, when inserted in a collaborative process, provides a comparative evaluation of results between companies and, thereafter, an identification of best practices (bench-marking). The purpose of this paper is to present the best practices identified by performance indicators, related to the measurement of wastes and associated to construction companies participation in the benchmarking research process “Implementation of a system of performance indicators of cement-based construction technologies of the Community of Construction of Recife city in Brazil-PROGRIDE”, coordinated by the Brazilian Association of Portland Cement-ABCP. Therefore, it was sought to characterize best practices that led to the benchmarking of performance indicators related to the wastes of concrete, industrialized mortar for masonry settling and blocks/ bricks. As a contribution, a set of factors that characterize the best practices for each technology and conducted to benchmarking were identified.

关键词： Indicators Concrete Masonry Construction Technologies

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Rainwater Harvesting in Multifamily Social Interest Housing

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Journal of Civil Engineering and Architecture 2015年第10期9卷 1261-1268页

作者： Regina Lucia Melo de Oliveira Marilia Karla da Silva Santos Simone Rosa da Silva polytechnic school of the university of pernambuco Recife 50720-001 Brazil

This study evaluated the reduction of water consumption in a SIH (social interest housing) complex from the simulation of implanting a rainwater harvesting system. The methodology consisted of characterization of the case study, survey data of water consumption and data of precipitation in the area, on-site visits to define the average consumption and monthly water distribution, and sizing of a rainwater harvesting tank following the Netuno Program. It was obtained 22.500 L as the ideal volume for the tank, supplying the demand for drinkingwater in 32%, although the reduction in the drinking water bills would be minor, since the object of the case study is considered SIH, and residents pay a fixed fee for consuming up to 10 m3 per month. Therefore, it becomes necessary to analyze this situation from a sustainable and environmental perspective, and the benefits are no longer only economic, but rather they take on a more comprehensive social dimension.

关键词：雨水收集系统社会利益住房收获固定费用调查数据 SIH 复合物

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Analytical Solutions of the Equations One Mechanical Thermal Model of a Helical Spring NiTi for Use in Heat Engine

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Journal of Mechanics Engineering and Automation 2014年第8期4卷 648-656页

作者： Luciana Lima Monteiro Jose Roberto da Costa Campos Tiago Leite Rolim Ricardo Artur SanguinettiFerreira Academic Department of Control of lndustrial Process Instituto Federal de Educacao Ciencia e Tecnologia de PernambucoRecife 50740-540 Brazil Department of Mechanical Engineering Polytechnic School of Pernambuco/UPE (University of Pernambuco) Recife 50100-010Brazil Department of Mechanical Engineering Federal University of Pernambuco Recife 50670-90 Brazil

Shape memory effect is capability of certain materials to recover its original shape after an apparently permanent deformation. The NiTi alloy of the composition is approximately equiatomic and it is the materials that exhibit the best characteristics for application of these properties, especially in the biomedical area, because of their excellent biocompatibility as: in the manufacture of medical and dental instruments, orthodontic wires, orthopedic materials, guide wires, stents, filters and components to realize the less invasive surgeries. In other areas, they are used for confections of electronic keys, spectacle frames, application in controllers, junction of pipes and electronic connectors among others. New research topics involving the application of these alloys super-elasticity are also known as pseudo elasticity. This event has an isothermal nature and involves the storage of potential energy in the shape memory effect and super-elasticity. In this context, this work falls within the scope of use of the technologies being an example of the work undertaken, in the course Graduate of Federal university of pernambuco in skills in these technologies. It will present the results of a heat engine which engine element is a helical spring made of a NiTi alloy equiatomic with memory effect reversibly. The spring is triggered by a hot source (~ 373.15 K) and a cold source (273.15 K). The machine is capable of producing a reciprocating oscillating between the two sources. Heat equations and the equations that describe the dynamic behavior of the spring were developed. Through the development of dynamic equations, it can determine the minimum mass for the motion of the machine, as well as the instantaneous and average power and overall efficiency. You can check the functionality of the machine by way of the inclination angle of the propeller and the coefficient of static friction. Among the main results, it was observed that the overall performance of the machine co

关键词：螺旋弹簧镍钛合金热方程机械模型形状记忆效应解析解生物相容性热机

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