Civil Engineering Group
Civil Engineering Group
Srivastava P.R.,Computer Science and Information System Group |
Kumar S.,Computer Science and Information System Group |
Singh A.P.,Civil Engineering Group |
Raghurama G.,Electrical Electronics and Instrumentation Group
Journal of Uncertain Systems | Year: 2011
Software Testing is an important process of software development which is performed to support and enhance reliability and quality of the software. It consists of estimating testing effort, selecting suitable test team, designing test cases, executing the software with those test cases and examining the results produced by those executions. Studies indicate that 40-50 percent of the cost of software development is devoted to testing, with the percentage for testing critical software being even higher. This paper makes an attempt to estimate reliable software testing effort using fuzzy logic. The paper deals with the features of the Software Testing Effort (STE) estimation problem by proposing a novel Fuzzy model by integrating COCOMO, fuzzy logic and weighing techniques, Test Effort Drivers (TEDs) into a single platform. In this model triangular membership functions with monotonic constraints have been chosen, which finally achieve good generalization. The proposed model is finally validated with a case study of an Organization. Another feature of the present model is that it allows for continuous rating values and therefore avoids the problem of similar projects having large variances in cost estimations. © 2011 World Academic Press, UK. All rights reserved.
Aykac S.,Gazi University |
Kalkan I.,Kirikkale University |
Uysal A.,Civil Engineering Group
Structural Engineering and Mechanics | Year: 2012
Although being one of the most popular strengthening techniques in reinforced concrete beams, the use of steel plates bonded to the soffit raises problems of ductility. This study aims at investigating the influence of the use of perforated steel plates instead of solid steel plates on the ductility of reinforced concrete beams. A total of nine reinforced concrete beams were tested. In addition to an unplated beam, eight beams with perforated steel plates of two different thicknesses (3 mm and 6 mm) were subjected to monotonic loading. Effect of bonding the plates to the beams with anchor bolts and with additional side plates bonded to the sides of the beam with and without anchors is also investigated. The use of bolts in addition to epoxy was found to greatly contribute to the ductility and energy absorption capacity of the beams, particularly in specimens with thick plates (6 mm) and the use side plates in addition to the bottom plate was found to be ineffective in increasing the ductility of a concrete beam unless the side plates are attached to the beam with anchors bolts. The thickness of the plate was found to have little effect on the bending rigidity of the beam.
Rajitha K.,Civil Engineering Group |
Mukherjee C.K.,Indian Institute of Technology Kharagpur |
Chandran R.V.,Regional Remote Sensing Service Center |
International Journal of Remote Sensing | Year: 2010
The present study focuses on the identification and quantification of land-cover changes occurring in the coastal stretches of the East Godavari delta, Andhra Pradesh, India. The analysis of series of multi-temporal satellite data provides an accurate quantification and therefore a better understanding of the process of land-cover changes during 1990-2005. Land-cover changes were quantified based on normalized difference vegetation index (NDVI) image differencing and a post-classification comparison approach. The change detection results were examined in terms of the proportion of land-cover classes and change trajectories with particular emphasis on coastal aquaculture development within the study area. The study shows that the total area under aquacultural ponds increased from 2985 ha in 1990 to 7067 ha in 2005. The major changes in the study area occurred during 1990-1994, when 2873 ha of agricultural land and 762 ha of degraded mangroves were converted into aquacultural ponds. The prediction of landcover distribution in 2010 on the basis of a Markov chain shows a continuing upward trend of the aquaculture area (8267 ha) with less impact on the mangrove area. The analysis predicts that the agricultural land area will continue to decrease from 50 122 to 46 978 ha during 2005-2010. © 2010 Taylor & Francis.
News Article | August 22, 2016
NatureZap offers a quick effective nontoxic solution to getting rid of unwanted plants around the home. We've shown you how to make your own effective herbicides to take care of unwanted plants in the yard, but if you'd rather 'point and shoot' to rid your home of weeds, the NatureZap seems like a great option. Instead of harsh chemicals that may cause other issues in soil and groundwater, this device employs a combination of heat and light to kill weeds in yards, along sidewalks, and even in your garden. Developed in part with funding through the Small Business Innovation Research (SBIR) office at Edwards Air Force Base (AFB) in southern California, the NatureZap device is said to produce die-back in treated plants at a rate of about 70-80%, especially in common nuisance plants such as ragweed, dandelions, and crabgrass. According to the news office at Edwards AFB, Dr. Danny Reinke of the 412th Civil Engineering Group, who is the principal scientist for conservation issues at the base, conceived the idea for the nontoxic weedkiller and submitted it to the SBIR office, where it was selected for funding and then sent to a few small businesses to develop it into a viable product. The NatureZap device, from Global Neighbor, is the result of that research and development, and along with being a potentially useful home weed eradication method, it could also play into the needs of the armed forces to find less toxic solutions (a goal of a 50% reduction) on Department of Defense properties, under federal regulations to protect endangered species located there. We already know that concentrated heat can kill plants, and the NatureZap employs heat as part of the treatment, but if plants use light to grow or flourish, how does applying light to a weed kill it off? It turns out that certain wavelengths of light can effectively disable the photosynthetic system in some plants, causing them to die in just a few days. "The reason a plant is green is because it reflects green light and for photosynthesis a plant uses blue light. Overloading the blue frequency range disrupts the enzymes in the photosynthetic process, which cuts off the food supply to the plant and it dies. Some herbicides overload the metabolic system of the plant and makes the weed burn from the inside out. I thought that overloading the photosynthetic system would maybe do the same thing." - Dr. Danny Reinke The company website goes even further in explaining the process, which actually uses three different methods - heat to wilt the leaves, infrared light to "explode chloroplast" in the leaves and root crown, and blue and ultraviolet lights that penetrate two inches into the ground to kill the roots. The NatureZap device does have some limitations, including the kinds of weeds it is most effective on, and its relatively small treatment area (just the area under the device reflector), which means it's only useful for individually treating weeds, although the company is said to be developing another version that could be pulled behind a tractor to cover a larger area at one time. According to TakePart, research on the devices' efficacy by a Central State University professor has shown that "NatureZap is at least as effective on ragweed as glyphosate, the primary ingredient in Monsanto’s Roundup," which is good news indeed, as glyphosate is being found in a large percentage of human bodies, and regardless of the argument of whether or not it's carcinogenic, it's probably not something we'd choose to be contaminated with. Global Neighbor has two versions of the NatureZap, a battery-powered device which has a 30 to 40 minute operating life per charge, and a 'wired' version that requires a power cord. Find out more at NatureZap or Global Neighbor.
Ralegaonkar R.V.,VNIT |
Gupta R.,Civil Engineering Group
Energy Education Science and Technology Part A: Energy Science and Research | Year: 2010
Due to the increase in living standard and demand, energy conservation has become important in industrialized countries. In view of rational use of energy, the present paper reviews intelligent building construction with the aid of passive solar architecture approach, which makes use of specific building design principles and reduces the artificial energy requirements for achieving indoor thermal comfort. As a climate responsive architecture, building design criteria has been studied with the help of several parameters like geographic location and climatic conditions, building shape, orientation, selection of construction materials, building openings viz. windows, selection of suitable sunshades, etc. All the salient building design parameters are studied and important findings and recommendations are suggested as the outcome of the study. The study in turn is useful for various resource persons involved in the construction activities for designing energy efficient intelligent buildings.
Ralegaonkar R.V.,VNIT |
Gupta R.,Civil Engineering Group
Renewable and Sustainable Energy Reviews | Year: 2010
Due to the increase in living standard and demand, energy conservation has become important in industrialized countries. In view of rational use of energy, the present paper reviews intelligent building construction with the aid of passive solar architecture approach, which makes use of specific building design principles and reduces the artificial energy requirements for achieving indoor thermal comfort. As a climate responsive architecture, building design criteria has been studied with the help of several parameters like geographic location and climatic conditions, building shape, orientation, selection of construction materials, building openings viz. windows, selection of suitable sunshades, etc. All the salient building design parameters are studied and important findings and recommendations are suggested as the outcome of the study. The study in turn is useful for various resource persons involved in the construction activities for designing energy efficient intelligent buildings. © 2010 Elsevier Ltd.
Agrawal S.,Civil Engineering Group |
Anshuman S.,Civil Engineering Group |
Bhunia D.,Civil Engineering Group |
Pandey R.K.,Samhigginbottom Institute of Agriculture Technology and Science
Composites: Mechanics, Computations, Applications | Year: 2011
Shear wall systems are among the most commonly used lateral-load resisting systems in high-rise buildings. Shear walls have very high in-plane stiffness and strength, which can be used to simultaneously resist large horizontal loads and support gravity loads, making them quite ad-vantageous in many structural engineering applications. Many references are available co ncerning the design and analysis of a shear wall. However, the decision about the location of a sh ear wall in a multistorey building is not much discussed in any of them. In this paper, therefore, the main focus is to determine the shear wall location in a multis -torey building based on its elastic and elastoplastic behaviors. An earthquake load is calc ulated and applied to a building of fifteen stories located in zone IV. Elastic and elastoplastic analyses were performed using both STAAD PRO 2004 and SAP2000 (2006) software packages. Shear forces, bending moment, and storey drift were computed in both cases and the location of a shear wall was established based upon the above computations. © 2011 by Begell House, Inc.
Bhunia D.,Civil Engineering Group |
Prakash V.,Indian Institute of Technology Roorkee |
Pandey A.D.,Indian Institute of Technology Roorkee
Structural Engineering International: Journal of the International Association for Bridge and Structural Engineering (IABSE) | Year: 2010
An effective design technique for symmetrical coupled shear walls is presented in this paper. The proposed formulation, including assumptions and steps with mathematical formulation, has been elaborated to arrive at the design technique. An example has been considered to validate the technique with the DRAIN-3DX and SAP non-linear analysis. A parametric study has also been considered to find out the limitations of this technique and suggest remedial action. It is concluded that the proposed design technique can be considered in the design of coupled shear walls under seismic motion.
Samui P.,Vellore Institute of Technology |
Edison T.,Vellore Institute of Technology |
Harikumar C.,Civil Engineering Group |
Sivathanu Pillai C.,Civil Engineering Group
International Journal of Advances in Soft Computing and its Applications | Year: 2012
This study employs Artificial Neural Network (ANN) and Support Vector Machine (SVM) for developing site characterization model of Indira Gandhi Centre for Atomic Research (IGCAR) (Kalpakkam) based on Standard Penetration Test (SPT) value (N). The input variables of ANN and SVM are latitude, longitude and depth of the boreholes. N is the output of the ANN and SVM models. The developed SVM gives an equation for prediction of N value at any point in IGCAR. The performance of ANN and SVM is comparable. The results show that the developed ANN and SVM is reliable model for prediction of N value at any point in IGCAR. © ICSRS Publication, 2012.