Faculty Publications
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Publications by NITK Faculty
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Item Engineering Geology For Civil Engineers(1995) Venkat Reddy, D.Item Engineering Geology -GTU-Student Series(2011) Venkat Reddy, D.Item Engineering Geology(2016) Venkat Reddy, D.Item Decorative and Dimensional Stones of India(1996) Venkat Reddy, D.Item Applied Geology(2010) Venkat Reddy, D.Item Climate Change—Present Scenario in Parts of India; Needed Preventive Measures and Role of Earth System Scientists(Springer International Publishing, 2015) Venkat Reddy, D.; Reddy, P.R.It is now evident, from glacier receding in Himalaya, ice melting in Arctic and Green Land, significant fluctuations in day and night temperatures, unprecedented monsoon vagaries that Climate change is a reality and Man needs to take urgent measures to contain its impact and save himself and Fauna-Fauna. The expected sea water rise, due to ice melting of Polar Regions, is bound to affect the long coastal corridors flanking the eastern and western parts of India. Unfortunately, in spite of many warnings by the Nature in the form of unprecedented spells of cloud bursts during non monsoon seasons of 2012 and 2013 no steps have been initiated to safe guard erosion of our coasts that are inhabited by millions of people. Since both the administrative channels and the political mind set are not tuned to take preventive measures it is essential for the earth system scientists to prepare land erosion, land subsidence, saline water ingression details in space and time using remote sensing and GIS techniques.In this exercise the earth scientists and space scientists should evolve strategies that can convincingly produce models showing how the coastal corridor can be affected with varied intensity and magnitude of sea water rise, in time and space. Specific details of the expected ill effects on the coastal segments of Andhra Pradesh and parts of Tamilnadu will be discussed along with proposed remedial measures to strengthen the wind and tide barriers in these areas. © Springer International Publishing Switzerland 2015.Item Modified self - Adaptive Plateau Histogram Equalization with mean threshold for brightness preserving and contrast enhancement(2013) Raju, A.; Dwarakish, G.S.; Venkat Reddy, D.Histogram Equalization (HE) is a simple, effective and widely used contrast enhancement technique as it can automatically define the intensity transformation function based on statistical characteristics of the image, but it tends to change the mean brightness of the image to the middle level of the gray level range. HE also produces saturation effects by extremely pushing the intensities towards the right or the left side of the histogram. To surmount these drawbacks, Clipping or Plateau Histogram Equalization techniques for brightness preserving and contrast enhancement have been proposed, but, these are not suitable for automatic systems because of manual selection of threshold level. Self-Adaptive Plateau Histogram Equalization (SAPHE) selects the threshold level automatically, but the process is relatively complicated and sometimes fails in execution. To overcome these drawbacks, a Modified Self - Adaptive Plateau Histogram Equalization with Mean threshold (Modified SAPHE-M) is proposed in this paper and compared the experimental results with Histogram Equalization (HE), Self-Adaptive Plateau Histogram Equalization (SAPHE) and Modified Self-Adaptive Plateau Histogram Equalization (Modified SAPHE) by using image quality measures such as Absolute Mean Brightness Error (AMBE) and Peak-Signal to Noise Ratio (PSNR). © 2013 IEEE.Item Satellite image contrast enhancement algorithm based on Plateau Histogram Equalization(Institute of Electrical and Electronics Engineers Inc., 2014) Raju, R.; Dwarakish, G.S.; Venkat Reddy, D.The quality of remotely sensed satellite images depends on the reflected electromagnetic radiation from earth surface features. Lack of consistent and similar amounts of energy reflected by different features from earth surface, results a low contrast satellite image. Enhancement of contrast is needed for satellite images to identify and extract objects from images, where features are essential in studying earth applications. In this paper, a new contrast enhancement technique for satellite images based on clipping or plateau histogram equalization has been proposed. The technique adopted Bi-Histogram Equalization with Plateau Limit (BHEPL) for image decomposition and Self-Adaptive Plateau Histogram Equalization (SAPHE) for threshold calculation. The proposed method has been compared with existing methods such as Histogram Equalization (HE), Brightness Preserving Bi-Histogram Equalization (BBHE), Minimum Mean Brightness Error Bi-Histogram Equalization (MMBEBHE), Dynamic Histogram Equalization (DHE), Bi-Histogram Equalization with Plateau Limit (BHEPL) and Self-Adaptive Plateau Histogram Equalization (SAPHE) with image quality measures such as Absolute Mean Brightness Error (AMBE) and Peak-Signal to Noise Ratio (PSNR). © 2014 IEEE.Item Removal of Methylene Blue from Aqueous Solution: An Approach of Environmental Friendly Activated Carbon(Springer Science and Business Media Deutschland GmbH info@springer-sbm.com, 2021) Jayaprakash, M.C.; Chaitra, M.; Rai, P.; Venkat Reddy, D.Methylene blue (MB) dye was adsorbed on an adsorbent prepared from cashew nut shell. A batch adsorption study was carried out with variable adsorbent amount, initial dye concentration and contact time. Studies showed that as the contact time increases relatively there will be an increase in the removal of methylene blue from the aqueous solution. There was also a comparative increase in the removal of dye with the increase in dosage of adsorbent. As the concentration of MB dye increased the percentage of removal of MB from the aqueous solution decreased for a given particular dosage. The results indicate that cashew nut shell activated carbon could be employed as a low-cost alternative to commercial activated carbon in the removal of dyes from wastewater. This work offers an economic incentive to the industrial practice for waste management and eco-friendly approach for removal of toxic dyes from textile waste water. © 2021, Springer Nature Switzerland AG.Item A review of technological development in water hazards control in China coalmines(CAFET INNOVA Technical Society 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2016) Gui, H.; Venkat Reddy, D.; Sun, L.The complex hydrogeological conditions in China coalmines have created a number of inherent water hazards. In the over 60 years of efforts in water hazards control, rich experiences have been accumulated in technology engineering. This article focuses on the major development stages and illustrates current applications of the key technologies in hydrological drilling, grouting and water plugging, and geophysical and geochemical prospecting, as well as the direction for future development, which can provide reference and facilitate communications with coalmines under similar conditions across the world. © 2016 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.