APPLICATION OF STEEL BINDING WIRES TO CONTROL SHEAR IN CONCRETE PRODUCTION

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This paper presents an experimental study conducted to investigate the effect of fibre Reinforcement on the mechanical properties and shrinkage cracking of concrete.

A small fibre volume fraction of 0.1%, 0.5%, 0.8% and 1% gave the following average compressive strengths: 21.85, 32.07, 33.43, 34.04, 34.48 and in ultimate tensile strength the averages were: 0.72, 0.81, 0.93, 0.98 and these fibres was used for optimum efficiency in minimum quality. Additionally, to make a comparative evaluation of the mechanical properties and shrinkage cracking, I examined the addition of fibres and found that it played a significant role in improving the mechanical performance of the investigated concrete specimens as well controlling their cracking behavior. The mechanical properties such as compressive strength, splitting tensile strength, were slightly better than those of non-fibre-reinforced Concrete. The addition of fibers at a small volume fraction in concrete is more effective for drying shrinkage cracks than for improving mechanical performance

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EFFECT OF CHICKEN FEATHER AND BACTERIAL TREATMENTS ON NITRITE LEVEL IN WASTEWATER

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The aim of this study was to investigate the optimal conditions for nitrite in removal wastewater by two bacterial species (Pseudomonas aeruginosa and Bacillus subtilis) and chicken feather (raw and carbonated) fibre, under batch experimental conditions. Prior inoculating of the medium with the respective test bacterial species or addition of the feather fibres and every 24 h for 144 h duration, aliquot wastewater samples were withdrawn for the estimation of nitrite concentration using standard methods. The findings from this study revealed that nitrite removal from waste water is dependent on the pH, the initial concentration of nitrite in the media and the quantity of feather used or inoculum size of the test bacterial used for inoculation. In presence of the raw feather, optimum pH range for nitrite removal was observed to be between 6 and 12. No remarkable nitrite removal was observed in presence of the carbonated feather. Highest nitrite removal was observed with high inoculum concentration of the test bacterial species. At high initial nitrite levels in the medium, removal of nitrite was not observed in presence of the test bacterial species. The observation from this study could be employed in scale-up studies. In general, the study was able to provide valuable information on the role of chicken feather fibre and the test bacterial species in the removal of nitrite from wastewater under the experimental conditions investigated.

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DEVELOPMENT OF SANDWICH CORE MATERIAL FOR DECK STRUCTURE

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Sandwich plate core material development for civil engineering and ship structures is required to devise light weight but high-flexure strength material. This paper discusses development of sandwich plate consisted of synthetic resin based core material and steel faceplates applicable for flat plate of ship deck structures. The core material was selected because it was made up of relatively low-cost and easy-to-find materials. The sandwich materials were tested to ensure that these materials met the Det Norske Verit as standard. The sandwich plate was then applied for designing deck structure of ship. Results of this study showed that the sandwich plate density was up to 47.6% lighter than the density of steel. Yet it was able to withstand 13.9% to 36.7% larger bending stress than the face plate steel material; thus the contribution of core material developed in this study to the sandwich bending strength was confirmed. Application of the sandwich plate material for roro passenger ship design demonstrated that it would simplify the ship construction and could reduce the self-weight of parallel middle body of ship structure by 13.08 %. Thus it might increase payload of the ship appreciably

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SEISMIC RESPONSE ANALYSIS OF LINKED TWIN TALL BUILDINGS WITH STRUCTURAL COUPLING

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Effect of structural links on seismic responses for a linked building system has been investigated in this paper by using finite element modeling technique. The linked building system in this study is represented by twin 40-story reinforced concrete frame-wall structures horizontally coupled by structural links. It is assumed that the two adjacent buildings were similar in this linked building system, so the two adjacent stories could be linked at the same height by an inter-building link. The linked building system is modeled as a rigid floor diaphragm for towers and as a beam for each link fixedly linked to the perimeter structural framework of the buildings. By employing earthquake time history excitation, the seismic responses of the twin towers were computed at different locations for the link. The responses of structures were evaluated and compared. The analysis outcomes indicated that the link could effectively change the structural responses of the linked building system. The structural responses have been decreased in some cases compared to the single tower, referring to the extra link stiffness as gathering the single tower to withstand seismic excitation. While the responses have been increased in other cases, attributing to the additional mass of link.Thus, in the design of seismic-resistant linked building systems, care must be taken. Particularly regarding properties of the link, specifically mass, stiffness, and location, as well as the link resistance with respect to the strength of the link and/or the structural elements composing the link to obviate undesired structural responses

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ENERGY TECHNOLOGIES AND SUSTAINABLE DEVELOPMENT

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This article represents results of an unbiased, factual, and scientifically valid analysis of all available data on ecological, economic, and social indicators of energy technologies and of how they influence sustainable development indicators. It marks out indicators characterizing the impact of energy technologies on the environment providing specific values to all energy sources considered (coal, gas, hydro, wind, solar, and nuclear). The article demonstrates that renewable energy sources and nuclear power are characterized by the best ecological indicators. The article also reveals that the most efficient energy technologies for promoting sustainable development are natural gas and nuclear power.

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SMALL HYDRO POWER RELEVANCE FOR BASIC ENERGY NEED IN AFRICA

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Africa has abundance of various resources to make it a giant continent but due to inadequate energy generation, full exploration of all these resources is continuously hindered leading to inability to meet up to her full status. Hydropower (HP) is one the energy sources that is available, renewable and sustainable but has been experiencing low patronage. Many researchers have reported the abundance of potential sites in Africa suitable for small hydro-utilization below 100 megawatts which can serve as isolated systems or supply national grids. Small hydro-power (SHP) generates clean and renewable electrical energy and is one of the most cost effective and environmental friendly energy generation technologies available. This paper reviews the distribution of hydro-power in Africa, its advantages, and some of the technologies involved in bringing power through SHP to all including rural dwellers.

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ENVIRONMENTAL SAFETY OF NUCLEAR POWER PLANTS OF RUSSIAN DESIGN

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This article provides analysis of issues related to environmental safety of nuclear power plants. It demonstrates that NPPs of Russian design have always been exhibiting a high level of environmental safety. The article gives brief characteristics of all safety barriers and focuses on stress tests showing a high safety level at operating NPPs. Special attention is given to NPPs equipped with new-generation 3+ VVER reactors with the capacity of 1200 MW.

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RADIATION DETECTION OF ALFA, BETA, AND GAMMA RAYS WITH GEIGER MULLER DETECTOR

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Alfa, beta and gamma ray detection research has been done with Geiger Muller detector which is aimed to know the influence of distance to the radiation intensity and the influence of barrier thickness to the radiation intensity of radioactive rays. In this study three radioactive sources of alpha, beta and gamma rays were used. While the type of barrier used were aluminum, copper and plastic. Based on the results of the research, it was found that the radiation intensity of radioactive rays was inversely proportional to the square of the radioactive source distance to the Geiger Muller detector. In addition, the thicker the barrier through which the radioactive rays are, the smaller the radiation intensity shown in the digital counter. In this case based on the thickness of the buffer, the barrier which has the greatest radiation intensity to the smallest are the plastics, aluminum, and copper. When comparing the intensities of the three radioactive sources, the greatest penetrating power to the smallest of the three radioactive elements are, respectively, gamma rays, beta rays and alpha rays

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QUALITY OF WORK LIFE OF EDUCATORS IN LEBANESE FRENCH UNIVERSITY

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This paper investigates the quality of work life variables of educators in Lebanese French university Erbil Kurdistan region of Iraq. This research study highlights the quality of work life of educators under various dimensions. New Challenges can be faced with educator’s nature of job role, work environment, Career Growth and Development, General Well-Being in achieving organizational goals. This study helps the educators to know the level of perception towards QWL and to enhance the same by the educational administrators. Quality of Work Life is the essential concept of favorable situations in a working environment. The Quality of Work Life facilitates employee’s training opportunities, job satisfaction and working conditions. A better Quality of Work Life improves the growth of the employee’s along with the organization growth. The universe of the study includes 4 colleges educators located within the Lebanese French university campus, i.e., college of engineering and sciences, college of education and languages, college of law and international relations and college of administration and economics. A sample of 50 respondents was collected from the universe. The collected data after being coded were analyzed using Statistical Package for Social sciences Research (SPSS) and various statistical tests were applied based on hypotheses and matching variables. It shows Quality of Work Life of Lebanese French University educators is in high level.

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CORPORATE GOVERNANCE THE JOURNEY OF INDIAN CORPORATE WORLD

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Like many other regulations, which have been enacted to develop a control mechanism, the corporate governance rules, regulations and guidelines have come into fore to regulate, if not control, the corporate misdeeds/misdealings. Be it the boardroom fight or the CEO and CFO conievance or the management-auditor hand in glove story, each has lead to some corporate fraud or disruption. In this preocess, the biggest loser has been the investor, who ultimately bears the burnt of the mismanagement or deficit in governance of the corporate affairs. This is a global phenomena and India being a part of the global economy, also suffers from such deficits.There are many regulations in the international scenario. The most important ones are the OECD guidelines, SOX of USA, Cadbury Committee report of UK. In India SEBI has formulated many rules including the listing agreement under clause 49 based on the recommendations of different committees. Through this study an attempt has been made to understand how the framework has evolved over a period of time in India and how many of the large sized accounting frauds have taken place due to poor Corporate governance mechanism in place.

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