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Appraisal of Risk in Construction Companies in India
Raghavenda Pratap Chauhan ; Yogendra Kumar Kushwaha
Civil Engineering
Year: 2016, Volume:3, Issue : 4
Pages: 111 - 115
Construction projects are initiated in composite and dynamic environments enchanting consideration of high dubiety and risk, which are heighted by demanding time restraints. Construction companies have changed important over the past several years. It is a company driven initially by private bank investors; the condensation of securitized real estate business has increased acceptably. It is valuable to the numerous technical system & business management risks that often describe higher exposures than those that are traditional system. Thus risk identification need arises. Risk identification is a key to identify those risks in a construction project and manage it following with proper treatment way. Risk allocation is defined in this study as a technical technique that aims to clarify and make estimate risks to individual and property impacted upon by a construction project. The general methodology system of this study largely on the field survey questionnaire which was collected from the local area building contractors and construction firms of different sizes by internet mail or by personnel meeting with contractor. A description literature review is initially selected to identify the risk impact factors that affect based on the performance of construction industry as a whole system. The survey questionnaire is planned to probe the cross-sectional behavioral step of construction risks Construction Company. The questionnaire marked for the buffer survey was obtained by seeing the literatures in the area of construction site and risk management. This research attempts to clarify and appraise the risks and to develop a risk allocation model which the bank investors/ construction developers/ company contractors can adopt when contracting construction work done in India.
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An Experimental Investigation of Self Curing Concrete Incorporated with Light Weight fine Aggregate and Polyethylene GLYCOL
Vishnu T ; Beena B R
Civil Engineering
Year: 2016, Volume:3, Issue : 4
Pages: 116 - 122
Curing of concrete is defined as providing satisfactory moisture content in concrete during its early ages in order to develop the desired properties of concrete. In conventional curing this is achieved by external supply of water after mixing, placing and finishing of concrete. In practice conventional type of curing is difficult to perform as it shall need a large amount of water, meanwhile scarcity of potable water increases day by day. In order to save water as well as achieve curing several researchers started thinking about developing self-curing agents. Self-curing or internal curing is a technique that can be used to provide additional moisture in concrete for more effective hydration of cement and reduced self-desiccation. Internal curing can be achieved by using saturated light weight aggregate and polyethylene glycol. They provide sufficient moisture to the hydrating cement throughout the cross section of the concrete. This study deals with objective of gaining knowledge in the field of concrete technology which includes the study of self-curing of concrete. The aim of the investigation is to evaluate the use of poly ethylene glycol and light weight fine aggregate as self-curing agent. Self-cured specimens were developed and kept as such without the application of any external curing. In this study compressive strength, flexural strength, split tensile strength of concrete containing self-curing agent is investigated and compared to conventional concrete.
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Seismic Assesment of Different Types of Eccentrically Braced Frames
Sreeshma K K ; Nincy Jose
Civil Engineering
Year: 2016, Volume:3, Issue : 4
Pages: 123 - 127
Steel structures are exhibit ductile behaviour when subjected to transient lateral loading, caused by wind or earthquake action. Steel bracings are lateral load resisting system used in seismic region. In eccentrically braced frames, a distance is either created between the two ends of the bracing members, or between the bracing member and the column, or between the bracing member and the beam. The created distance is called link. The main function of the link is to provide a weak section in the frame which provides plastic deformation capacity and the energy released by the earthquake. EBF configuration is similar to traditional braced frames with the exception that at least one end of each brace must be eccentrically connected to the frame. The energy dissipation is achieved through the yielding of a beam segment called the link, while the other frame members, including outer beam segments, braces, and columns, should remain essentially elastic. Present study deals with eccentrically braced frames with short link. Assess the performance of different types of eccentrically braced frames by performing seismic analysis over the structure. The variation of performance with change in link length, height of the building was also considered in this study.
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Variation in % of Rice Husk Ash with Cement for Improvement in Properties of Concrete
Nitin Goel ; R. K. Sharma; Sonu Gautam
Civil Engineering
Year: 2016, Volume:3, Issue : 4
Pages: 128 - 133
The Rice Husk Ash can be used as an alternative material instead of ordinary Portland cement. This technology could reduce the CO2 emission to the atmosphere caused by the cement industries. In the present investigation, a feasibility study is made to use Rice Husk Ash as an admixture to replace Portland cement in Concrete, and an attempt has been made to investigate the strength parameters of concrete (Compressive and Flexural). For control concrete, IS method of mix design is adopted and considering this a basis, mix design for replacement method has been made. Five different replacement levels namely 5%, 7.5%, 10%, 12.5% and 15% are chosen for the study concern to replacement method with range of curing periods starting from 7days and 28days are considered in the present study. Therefore, this paper aims at experimental study of variation of percentage of rice husk ash with cement for improvement in properties of concrete.
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A Survey on Medical Image Retrieval Systems
Riny Joy ; Jyothish K John
Computer Science and Engineering
Year: 2016, Volume:3, Issue : 4
Pages: 134 - 137
Content Based Image Retrieval plays very crucial role in many fields including medical field. Since medical image databases are rapidly expanding in quantity and heterogeneity, an efficient retrieval system is needed by clinicians. Medical image retrieval is fundamental to modern healthcare because it helps in clinical decision making, evidence-based diagnosis, teaching, and research. This survey gives an overview of available literature in the field of content based medical image access and on the technologies used in the field.
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Evaluation of Seismic Pounding between Adjacent RC Buildings
ABHINA N.K ; NEERAJA NAIR
Structural Engineering
Year: 2016, Volume:3, Issue : 4
Pages: 138 - 147
Pounding between adjacent structures is commonly observed phenomenon during major earthquakes which may cause both architectural and structural damages. To satisfy the functional requirements, the adjacent buildings are constructed with equal and unequal heights, which may cause great damage to structures during earthquakes. During earthquake, the buildings vibrate out of phase and at rest separation is deficient to accommodate their relative motions. Such buildings are usually separated by expansion joint which is insufficient to provide the lateral movements of the buildings during earthquakes. It can be prevented by providing safe separation distances, sometimes getting of required safe separations is not possible in metropolitan areas due to high land value and limited availability of land space. If building separations is found to be deficient to prevent pounding, then there should be some secure and cost effective methods to prevent structural pounding between adjacent buildings. There are many buildings which are constructed very nearly to one another in Metropolitan cities, because everyone wants to construct up to their property line due to high cost of land. This study compare the seismic pounding of framed RC as well as soft story RC buildings, and evaluates the prevention techniques of pounding between adjacent buildings during earthquakes. Constructing new RC walls, cross bracing system and combined RC wall & bracing, with proper placement are proposed as possible prevention techniques for pounding between adjacent buildings. ETABS software is used for modeling and analysis of buildings. After analysis results shows that seismic pounding is more severe in the case of adjacent soft-storey building compared to framed buildings, that is displacement of soft-storey buildings are larger than framed buildings, and also displacement of buildings with different floor level is less than that of buildings with same floor level. The mitigation methods such as use of shear wall, bracings and combination of shear wall & bracings are proved to be effective in all cases.
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Performance Study and Spray Pattern Analysis of Biodiesel Mixture
Pradeepa. S ; V V Prathiba Bharathi
Mechanical Engineering
Year: 2016, Volume:3, Issue : 4
Pages: 148 - 157
The main objective of this project is to study the fuel spray pattern of bio-diesel for different blends at different temperatures and pressures, then compare these spray patterns with the spray pattern of diesel fuel. The performance of engine running on bio-diesel for different blends at different temperatures, then compare those results with the performance of conventional diesel and also to investigate the properties of fuel such as specific gravity, density, viscosity etc. of diesel and biodiesel fuel. The Test fuels used were a conventional diesel and 20%, 30%, 40%, blends of Transesterified PAMO oil with diesel. In order to analyze the performance of engine the above mentioned biodiesel blends were used to run the engine at room temperature and also at elevated temperatures and the parameters like brake power, brake thermal efficiencies and Mechanical efficiencies were tabulated and compared with that of conventional diesel fuel. And in order to analyze the fuel spray pattern the above mentioned biodiesel blends were sprayed through fuel injectors of three different nozzle pressures which are 180 bar, 200 bar and 220 bar at room temperature and also elevated temperatures and the resulting spray patterns of the biodiesel blends were compared with the spray patterns of diesel fuel. Also the various properties such as viscosity, flash point, fire point etc., of diesel and the three blends of biodiesel were measured by conducting their respective tests. In this work it was found that the viscosities of the various blends of the biodiesel decreases with increase in temperature of the fuel and also that the biodiesel blends of 20%, 30%, 40%, Transesterifies PAMO oil can be successfully used as fuels in Compression Ignition (CI) engines without many engine modifications as they exhibit better thermal efficiency and much similar to that of diesel at room and elevated temperatures of up to 40 Degree Celsius.
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A Study on Soil Structural Interaction of Multi Storied Framed Structure with Different Support Conditions
K. S. Sai Kumar ; M.K.MV Ratnam; Dr. U. Ranga Raju; M. L. Kumar
Civil Engineering
Year: 2016, Volume:3, Issue : 4
Pages: 158 - 161
The response of a structure to earthquake shaking is affected by interactions between three linked systems: the structure, the foundation, and the soil underlying and surrounding the foundation. Soil structure interaction analysis evaluates the collective response of these systems to a specified ground motion. The terms Soil-Structure Interaction (SSI) and Soil-Foundation-Structure Interaction (SFSI) are both used to describe this effect in the literature. In this report, the foundation is considered part of the structure, and the term SSI has been adopted. The present study provides systematic guidelines for determining the natural periods of frame buildings due to the effect of soil-flexibility and identification of spring stiffness for different regular and irregular story buildings. Specific techniques are described by which SSI phenomena can be simulated in engineering practice, and recommendations for modelling seismic soil-structure interaction effects on building structures are provided. The study is carried out by considering high raised building of about G+19 storied considering all the basic parameters like stiffness factors, base shear, wind forces etc., It also studies on seismic analysis of buildings in which the stiffness is reduced for time being.
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Detecting Patterns to Fill the Missing Data in Taxonomical Investigations
Umamaheswari. D ; Shyamala. N
Computer Application
Year: 2016, Volume:3, Issue : 4
Pages: 162 - 165
Missing data arise in almost all serious statistical analyses. Missing data is found to be a serious problem regarding the taxonomical investigations. Since a simple data is missing the continuity of the species lies as a question mark. Hence to avoid this problem we discuss a variety of methods to handle missing data, including some relatively simple approaches that can often yield reasonable results.
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Efficient Road Patch Detection based on Active Contour Segmentation
Ajeesha A A ; Arun Kumar M N
Computer Science and Engineering
Year: 2016, Volume:3, Issue : 4
Pages: 166 - 173
Pavement management systems for monitoring the road surface distress rely on upto date road condition data to provide effective decision support for scheduling the road maintenance. The recent method includes subjective laborious and time-consuming surveys. Even though specialized vehicles equipped with additional sensors exist to automatically collect the data, their high cost restricts their usage to the primary road network and hence this leads to long gaps between inspections. Therefore, a pavement surface condition monitoring systems that provide inexpensive and frequent updates on the road condition are needed. Such systems would require robust and automatic defect detection methods using low cost sensors. So a novel method is proposed for detecting the road patches from the image and video data collected based on active contour segmentation. The visual characteristics used to detect the patch consist of: 1) patch consists of a closed contour and 2) texture of patch is same as with the surrounding intact pavement. The patch is correctly segmented using active contour which accurately detect the total number of patches, its area and shape and hence reduces some false positives. In order to trace the patch in subsequent video frames, it is then passed to kernel tracker. This way redetection of patch is avoided and each patch is reported only once. The process is implemented in a MATLAB 2014prototype and tested with video data collected from local roads in Ernakulam, India. The results show that the suggested method has 82.75% precision and 92.31% recall and 80% accuracy for detecting the patches in road images.
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Abstract
