Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item Antenna gain determination using a microwave CAD tool-HFSS(2008) Bojja Venkatakrishnan, B.V.; Srivatsan, R.; Raghavan, S.; Sriram Kumar, D.S.Antennas have been increasingly studied in recent years. Different antennas have been designed for different applications based on the characteristics of the receiving side. Antennas cannot be fabricated as such and then be studied on. This leads to waste of material and requires a lot of iterations until we get the final design. In order to study the characteristics of an antenna without fabricating it, we need a special tool called a "SIMULATOR TOOL". It can determine all possible characteristics of an antenna under test. In this paper we'll be simulate few of the antennas using HFSS simulator tool. © 2008 IEEE.Item Finite element simulation of exit hole filling for friction stir spot welding - A modified technique to apply practically(Elsevier Ltd, 2014) Vinayak, V.; Sanjeev, N.K.; Hebbar, H.S.; Kailas, S.V.Friction Stir Spot Welding (FSSW) is a solid state joining process which uses a rotating tool consisting of a shoulder and/or a probe. Though it has proven its potential in joining difficult to weld materials, one of the drawbacks of process is prevalence of exit hole at the end of the process. In the recent past new techniques have been developed to eliminate this draw back by filling this unwanted hole. Determining the appropriate tool design and parameters to fill a hole for given situation is a challenge. The article demonstrates the effective method of obtaining these desired parameters a priory. A three dimensional (3D) model is developed in finite element (FE) commercial code DEFORM 3D/Implicit. It was found that internally filleted shoulders help in filling of holes. The obtained optimized process parameter (tool rotation speed of 900rpm, plunge velocity of 30mm/sec and plunge depth of 0.2 mm) for AA2024 plate (5mm thick) have potential to reduce number of experiments. © 2014 The Authors.Item MRPL++: Smarter-HOP for optimizing mobility in RPL(Institute of Electrical and Electronics Engineers Inc., 2016) Anand, M.C.R.; Tahiliani, M.P.Routing Protocol for Low power and lossy networks (RPL) is a proactive algorithm for Low-power and Lossy Networks (LLNs). Recent growth in Internet of Things (IoT) applications has made proactive handling of mobility apparent. While RPL does not tackle mobility, mRPL addresses it by adopting a proactive Hand-Off strategy. Since this strategy follows a greedy approach to select the next hop, a best route may not be always chosen. This paper proposes mRPL++, an extension of mRPL, to ensure best route selection in mobile scenarios. We have implemented mRPL++ in the Contiki 6LoWPAN/RPL stack and validated it through extensive simulations. © 2016 IEEE.Item Simulation of cathode ray tube(Institute of Electrical and Electronics Engineers Inc., 2017) Maiti, D.; Rajagopal, D.; Kar, A.; Ramteke, P.B.; Koolagudi, S.G.The Cathode Ray Tube (CRT) experiment performed by J. J. Thomson, is one of the most well-known physical experiments, which led to the discovery of electrons. The experiment could also describe characteristic properties, essentially, its affinity towards positive charge, and its charge to mass ratio. This paper describes the simulation of J. J. Thomson's Cathode Ray Tube experiment. The major contribution of this work is the new approach for modelling this experiment, with a great deal of accuracy and precision, using the equations of physical laws to describe the motion of the electrons. The motion of the electrons can be manipulated and recorded by the user, by assigning different values to the experimental parameters. This can be used as a good learning tool by the needy. © 2017 IEEE.Item A Support Vector Regression-Based Approach to Predict the Performance of 2D 3D On-Chip Communication Architectures(Institute of Electrical and Electronics Engineers Inc., 2019) Nirmal Kumar, A.; Talawar, B.Recently, Networks-on-Chips (NoCs) have evolved as a scalable solution to traditional bus and point-to-point architecture. NoC design performance evaluation is largely based on simulation, which is extremely slow as the architecture size increases, and it gives little insight on how distinct design parameters impact the actual performance of the network. Simulation for optimization purposes is therefore very difficult to use. In this paper, we propose a Support Vector Regression(SVR)-based framework, which can be used to analyze the performance of 2D and 3D NoC architectures. Experiments were conducted by varying architecture sizes with different virtual channels, injection rates. The framework proposed can be used to obtain fast and accurate NoC performance estimates with a prediction error 2% to 4% and minimum speedup of 3000 × to 3500×. © 2019 IEEE.Item Singlow: Simulator for General Network Flow Problems(Institute of Electrical and Electronics Engineers Inc., 2020) Raghavan, S.; Bhagtya, P.; Chandrasekaran, K.Simulation is an important process and an inevitable part of engineering. There are several applications of simulation with one of the important being visualization of complex methods and processes. This paper aims at creating a simulator for general network flow optimization problems. This work uses a modular approach for creating a simulator. A simulator in this area is necessary for several reasons. The main reason for requirement is its usefulness in explaining the problems to the people/students who might use these kinds of network optimization methods to solve several variety of problems. This simulator can simulate standard problems namely transportation problems with various methods, network flow problem and some popular problems in that area. This simulator will be helpful for educational institutions to teach the students about the standard problems on network flow optimization. Here this paper proposes a framework i.e. Singlow for the above mentioned purpose. This paper explains the framework with the flow of execution by keeping in mind a general simulation software. The Simulator has been designed and implemented using Processing 3.4, a software which facilitates designing graphical user interfaces. © 2020 IEEE.Item Multi-device Login Monitoring for Google Meet Using Path Compressed Double-Trie and User Location(Springer Science and Business Media Deutschland GmbH, 2021) Patil, A.; Singh, A.; Chauhan, N.Google Meet, much like other online video-conferencing platforms, has seen a surge in popularity for its reliability and convenience, which also makes it necessary to be analysed for vulnerabilities owing to its large user-base. This paper focuses on an observational study on Google Meet to find certain shortcomings, specifically the freedom users have to login through multiple devices and how it can aid attackers in certain scenarios. A simulated back-end architecture is developed to propose a proof of concept on tackling the explored issues using a path compressed double-trie structure and the location of user from his public IP address. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Attentiveness monitoring and user record maintenance in virtual classrooms(Institute of Electrical and Electronics Engineers Inc., 2021) Patil, A.; Singh, A.; Chauhan, N.Virtual classrooms rely on video conferencing tools like Google Meet, Microsoft Teams or Zoom, to carry out lecture sessions. Although previously it was an additional tool, the pandemic scenario made it the primary mode of taking classes. It is observed that lecturers find it hard to monitor and look after every student in such a scenario due to divided webcam feeds, simultaneous presentation and replying on chats. An automated monitoring system can aid in such a scenario where the user's local system can be used for localized calculation of attentiveness using face and eye detection. A simulated back-end architecture is developed to propose a proof-of-concept for the same using a path compressed master-Trie structure. © 2021 IEEE.Item Simulation on Motion of a Trebuchet(Springer Science and Business Media Deutschland GmbH, 2022) Mulamuttal, K.B.; Kattigenahally, K.K.; Kalluvalappil, G.V.; Raj, P.; Narasimhamurthy, N.K.; Vankalkunti, S.In this paper, an innovative approach to analyze the performance of one of the basic mechanical system “Trebuchet†is discussed. An efficient simulation approach is developed for ‘The motion of a Trebuchet’ analysis. The developed simulation tool provides the access for all possible parametric variations so that the theoretical concepts are visualized easily by very simple simulation process. The process of development of the simulator is briefed in this paper. Simulations can be efficiently used to analyze the behavior of a Trebuchet system. For diverse patterns of control parameters, the system design can be tested using simulations and the most efficient system can be implemented in real time. Likewise, this paper explains in detail how the motion of a trebuchet is effectively analyzed using simulation by giving extreme conditional parameters. HTML, CSS and JavaScript tools are used to develop this simulation. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.Item Estimation and Comparison of Saturation Flow at Signalized Intersection in Mixed Traffic Condition(Springer Science and Business Media Deutschland GmbH, 2022) Mahapatra, M.J.; Advani, M.; Ravi Shankar, A.U.Signalized intersections are the important part of urban road network. Capacity of signalized intersections has significant role in capacity of overall road network in an area. Accordingly, capacity estimation of signalized intersection and therefore the estimation of saturation flow values become an important aspect especially for Indian roads due to the presence of different types of vehicles and space sharing-based vehicular movement. This study extracts the saturation flow from the field data captured through videography and compares it with the saturation flow values estimated by various methods available in literature. Data have been collected at two signalized intersections; first one is a four-legged intersection, and other one is three-legged intersection. Approach width of all arms of both intersections ranges from 7.6 to 10.3 m. Both intersections are located on the main arterial road of Delhi, India, and at the distance of 1.1 km without any obstructions in-between. Saturation flow has been estimated through existing methods available in literature and compared with the developed model in this study. Proposed model indicates that with the increased width, saturation flow values also increase. Values estimated are closer to values obtained by Webster’s method. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.