Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item Data Aggregation of Tweets and Topic Modelling Based on the Twitter Dataset(Association for Computing Machinery, 2021) Srinivasan, V.; Chandrasekaran, K.Twitter is one of the most popular online social networks. It has a relatively simple data model and an intuitive API to access Twitter data. This makes it easy to collect social data and analyse the patterns of online behaviour. Twitter has an impactful presence among politicians, entrepreneurs, news agencies, public figures, and this makes it a crucial playground for social discussion. The topics discussed on Twitter often lead to or are the cause of social events. Therefore, a lot of information can be inferred from Twitter data. This can be used by NGOs, government agencies or policymakers to develop meaningful understanding and respond to the emerging trends. In this project, I will discuss a method to aggregate tweets related to Elon Musk and Tesla from Twitter servers using the Twitter API in the form of a web crawler. The data obtained from the web crawler will be combined with a ready-made dataset containing similar information, and the datasets will be merged together. After collecting relevant tweet information, I will perform topic modelling using Latent Dirichlet Allocation (LDA) on his tweets to find out the most common topics tweeted by Elon Musk. © 2021 ACM.Item Effect of High Temperature on the Compressional Wave Velocity of Two Sandstones with Different Grain Sizes(Springer Science and Business Media Deutschland GmbH, 2024) Manikanta, V.; Hasainar, H.; Badiger, N.K.; Kothari, V.; Bhat, A.; Srinivasan, V.Understanding rock behaviour at high temperatures can serve as vital information in restoring fire-damaged monumental structures. This knowledge is essential for engineering and construction purposes, as it allows for assessing rock stability and potential hazards and developing appropriate safety measures in areas with high temperatures. This study investigates the effect of different temperatures on two sandstones with varying grain sizes. The rock was first heated to a range of temperatures such as 35, 250, 500, 750, and 1000 °C. To identify the thermal damage of the rock samples, the Ultrasonic Pulse Velocity measurement instrument is used to identify the inner cracks. This research discusses the application of Ultrasonic Pulse velocity (UPV) to identify thermal damage and analyse related parameters of two different sandstones. The ultrasonic method is one of the simple and reliable techniques to understand the damage conditions of rocks. There were significant variations in the P-wave velocity with thermal treatment, it is observed that a negative trend developed in the primary wave velocity as the temperature increased. They give qualitative and quantitative inferences on the extent of damage caused by various environmental parameters, particularly heating. The data obtained from the present study were compared to check the confidence of regression models. The mean absolute percentage error method, the root mean square error method (RMSE), was carried out on thermal damage of rock samples. Probabilistic analysis was also conducted to estimate the damage on rocks at different confidence levels. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.Item Effect of Heating and Fluid Saturation on Certain Physico-Mechanical and Fracturing Behaviour of Concrete(Springer Science and Business Media Deutschland GmbH, 2024) Gafur, I.A.; Anilkumar, A.; Parappalli, A.N.; Srinivasan, V.Understanding the fracturing characteristics of construction materials under varying environmental conditions is very important in considering the safety of infrastructural facilities for sustainable civil structures. Concrete has been extensively used in construction, and with recent advancements in offshore structures, its strength in adverse conditions is pivotal and hence requires significant attention. This study investigates the variation in the mechanical properties and fracturing behaviour of M25 concrete cubes under different environmental conditions. The cubes were subjected to five different conditions: heating, saturation, and a combination of heating and saturation. Saturation was carried out separately using water and brine solutions. Three cubes were cast for each condition. The physical properties included density and Ultrasonic pulse velocity, followed by mechanical testing for strength. Acoustic emission monitoring was carried out simultaneously along the mechanical testing. Acoustic emission techniques are used to visualize fracturing behaviour of concrete cubes. Fracture thresholds are established to find crack closure and elastic region, and regions of stable crack propagation and unstable crack propagation. The results show that the combination of heating and fluid saturation significantly impacts the physico-mechanical properties of concrete, reducing its compressive strength and increasing its susceptibility to fracture. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.Item The Physical and Mechanical Properties of Closepet Granite After Thermal Treatments with Water and Brine Cooling Conditions(Springer Science and Business Media Deutschland GmbH, 2025) Raj, M.S.V.; Srinivasan, V.In recent years, efforts to utilize geothermal systems as a clean and renewable energy resource have gained considerable significance. This is due to unprecedented carbon emissions from the conventional fossil fuel system, which resulted in increased carbon footprints. Granite rocks, often prioritized for geothermal extraction, are relatively intact. Hence, such reservoirs require induced fracturing for the development of an enhanced geothermal system. Several studies have been carried out to clarify the fundamental behavior of rocks encountered in the geothermal energy systems and to assess their effectiveness during energy production. In this study, granite rocks belonging to the Closepet granitoid of Eastern Dharwar Craton were investigated for their physical and mechanical stability under different fluid conditions after heating to elevated temperature levels. This study experimentally investigates the influence of heating and cooling by different fluids on the physical and mechanical properties of Closepet granite. The granite specimens prepared as per international standards were heated at specific temperatures of 100℃, 200℃, 300℃, 400℃, and 500 °C. The heated samples were quenched in two different fluids, like brine and water. The influence of different cooling fluids on the physical properties like P-wave, bulk density, and the mechanical properties such as Uniaxial compressive strength (UCS), Brazilian tensile strength (BTS), Elastic modulus (E), and was determined experimentally. The damage introduced by the thermal treatment was evaluated from the arrived physical and mechanical parameters. The experimental results suggested that the physical and mechanical properties under brine quenching are more severe than those under the water cooling program. This study provides an insight into the enhanced effect of fracturing fluid on the behavior of rocks under geothermal energy production. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.