Faculty Publications
Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736
Publications by NITK Faculty
Browse
7 results
Search Results
Item Study of dynamic changes through geoinformatics technique: A case study of Karwar coast, west coast of India(Springer, 2019) Yadav, A.; Dodamani, B.M.; Dwarakish, G.S.Shoreline is one of the geo-indicators of the coastal zone. Coastal zone is subjected to threats due to change in shoreline. Shoreline change leads to modification and causes for damages of properties, infrastructure around the shoreline region. These modifications, changes of land expands too many issues of the environment under the coastal zone. The present study was carried out by employing remote sensing and GIS techniques for the coastal regime of Karwar, India. LANDSAT-8 remote sensing data was integrated with the GPS data collected during the field survey. The satellite data is processed and analyzed using ERDAS IMAGINE 2014 tool and ArcGIS 10.3 tool, respectively. High Water Line (HWL) is considered for the extraction of shoreline. The visual interpretation of satellite imageries is carried out to distinguish the HWL. Net Shoreline Movement (NSM) was evaluated by adopting Digital Shoreline Analysis System (DSAS) tool. Statistical methods such as Weighted Linear Regression (WLR), Linear Regression Rate (LRR) and End Point Rate (EPR) were used to estimate the changes of shoreline. The present study reveals that shorelines of Karwar Coast, Ravindranath Taghore beach experiences an average erosion rate is −4.61 m/year (EPR), −1.49 m/year (LRR), and 0.19 (WLR) and Devbagh beach experiences an average erosion rate is −9.74 m/year (EPR), −7.53 m/year (LRR), and −11.55 m/year (WLR). © Springer Nature Singapore Pte Ltd. 2019.Item Design and development of SiGe HBT based high gain amplifier for GPS application(2008) Soni, B.; Ramasubramanian, R.; Sancheti, S.A two stage high gain small signal amplifier for GPS based receiver application is designed and realised using SiGe Hetrojunction Bipolar transistor (HBT). The measured gain and noise figure is 33.5 dB and 2.9dB respectively at Vce of 2 V, and total current of 10mA. The circuit is fabricated on microstrip configuration using RT duroid substrate of dielectric constant 10.5 and height 50 mils. This circuit is being used in satellite based GPS receiver. © 2008 IEEE.Item An android GPS-based navigation application for blind(Association for Computing Machinery, 2014) Nisha, K.K.; Pruthvi, H.R.; Hadimani, S.N.; Guddeti, G.R.M.; Ashwin, T.S.; Domanal, S.G.Visual Impairment makes the person depend on another person for all his works and daily chores. Through the application proposed in this paper, we aim to eliminate this dependency of a visually impaired person when travelling from one place to another. The main goal is to provide information regarding the current location, how much distance and time is required to reach the destination as well as provide the user with the directions and turns to be taken while travelling by providing continuous audio feedback in his understandable language. © is held by the author/owner(s).Item Empowering Women's Safety with smart IoT Technology: A Robust Protection System(Institute of Electrical and Electronics Engineers Inc., 2023) Ramesh, N.V.K.; Alaparthi, A.; Sai Charan, G.; Settipalli, R.; Velga, P.; Vani, B.V.Nowadays, women's safety has emerged as one of the world's most pressing issues, and crime against women has significantly increased nationwide. The frequency of auto theft and accidents has increased significantly as compared to the previous decade. The value of a human life exceeds all other values, and it is more crucial to seek assistance when you do so than to provide a helping hand. Every day, women from all walks of life struggle to maintain their safety and defend themselves. In the presence of insensitive guys who regularly harass, assault, and violate the dignity of women, and in front of their wandering eyes. Public transport, especially public places, has become hunter territory. For these atrocities that women undergo current scenario A clever wearable safety tool for girls primarily based totally at the Internet of Things is being implemented. It consists of a Arduino, Camera and a buzzer, and a button to activate the service. This unit is very remote and with the click of a button, it is activated by the victim when attacked, retrieves their current location and captures images of the victim Attacker via Esp32 Cam Module. A predetermined contact number will receive both the taken image and the location link. It monitors through the victim's smartphone and avoids the usage of additional hardware or modules, keeping the device compact. Live video streaming is via webcam and live Position is obtained by GPS module. This paper makes a collision avoidance and detection systems. There are numerous initiatives being taken with the goal of saving lives. The proposed study intends to develop an IoT-based security system that prioritises protecting women. © 2023 IEEE.Item On Cryptographic Approaches for Detecting GNSS Spoofing Attacks(Institute of Electrical and Electronics Engineers Inc., 2024) Ramalingam, J.; Maned, V.R.The increasing adoption of technologies dependent on Global Navigation Satellite Systems (GNSS) services has prompted many countries to develop their own navigation, positioning, and timing (PNT) systems. Spoofing GNSS signals is a significant security issue as it can undermine the reliability of GNSS positioning and timing services. In this paper, we analyze the efficacy of the Navigation Message Authentication (NMA) schemes proposed for GPS (USA) and Galileo (Europe). We demonstrate the ineffectiveness of the Chameleon hash key-chain proposed for GPS signal authentication and establish that standard digital signatures offer better performance than Chameleon hash key-chain in this context. © 2024 IEEE.Item Importance of geology and soil survey for mobile communication site planning using RS/GIS technology(2010) Naveenchandra, B.; Lokesh, K.N.; Usha; Gangadhara Bhat, H.G.Geology and Soil survey constitutes a valuable resource inventory linked with the survival of life on the earth. The technological advancements in the field of remote sensing and Geographical Information System have been a boon for such surveys. The present paper describes the role of Remote sensing and Geographical Information System (GIS) technologies for geological mapping and characterizing the importance of soils at various scales for identification of suitable sites for mobile communication network. Cellular network design is becoming more and more important since the network quality is highly dependent on the distribution of base stations. To design a cellular network for a particular region efficiently and accurately, the site suitability is an important determination. The country's mobile services market is forecast to grow by a compound annual rate of 28.3% in next five years. India is a vibrant market from communications point of view. The subscriber base in the wireless market in India, the world's fastest growing telecom market reached another milestone when it surpassed 200 million subscribers in Aug 2008. At present there are around 54000 cell sites operated by different GSM/CDMA operators. This number would further go up to 80,000 in next couple of years. To serve an increasing number of users requires an increasing number of base stations. Thus, operators must carefully plan the deployment and configurations of radio base stations to support voice and data traffic at a level of quality expected by customers. The present study carried out in the Udupi district of Karnataka State based on IRS 1C/1D LISS-III and CARTOSAT-1 satellite data. Various thematic maps like geology, soil, geomorphology, slope and land use/land cover with DEM has helped in understanding the terrain in a better way. The multi spectral satellite data in conjunction with SuperGIS, SuperPad and Getac GPS hardware have helped to formulate suitable plans and strategies for an effective Telecom planning and development in Udupi district. © 2010 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.Item Age-based classification of arecanut crops: a case study of Channagiri, Karnataka, India(Taylor and Francis Ltd. michael.wagreich@univie.ac.at, 2016) Bhojaraja, B.E.; Shetty, A.; Nagaraj, M.K.; Manju, P.Arecanut is one of the predominant plantation crop grown in India. Yield of this crop depends upon age of the crop and there is no information on the spectral behaviour of arecanut crops across its ages. In this study popular supervised classification algorithms were utilized for age discrimination of arecanut crops using Hyperion imagery. Arecanut plantations selected for the study are located in Channagiri Taluk, Davanagere district of Karnataka state, India. Ground truth information collected involves: (i) GPS coordinates of selected plots, (ii) spectral reflectance of arecanut crops with age ranging from 1 to 50 years, using handheld spectroradiometer with 1 nm spectral resolution. These spectral measurements were made close in time to the acquisition of Hyperion imagery to build age-based spectral library. It is observed from the analysis that crops of ages below 3, 3–7, 8–15 and above 15 years were showing distinct spectral behaviour. Accordingly, crops age ranging from 1 to 50 were grouped into four classes. Classification of arecanut crops based on age groups was performed using methods like spectral angle mapper, support vector machine and minimum distance classifier, and were compared to find the most suitable method. Among the classification methods adopted, support vector machine with linear kernel function resulted in most accurate classification method with overall accuracy of 72% for within class seperability. Individual age group classification producer’s accuracy varied minimum of 12.5% for 3–7 years age group and maximum of 86.25% for above 15 years age group. It may be concluded that, not only age- based arecanut crop classification is possible, but also it is possible to develop age-based spectral library for plantation crop like arecanut. © 2015 Taylor & Francis.