Browsing by Author "Sengupta, S."

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Detection of bradycardia from electrocardiogram signals using feature extraction and snapshot ensembling
(Springer Science and Business Media B.V., 2022) Sengupta, S.; Mayya, V.; Kamath S․, S.K.
One of the most common diagnostic techniques for detecting certain cardiovascular diseases is using electrocardiogram (ECG) readings. Doctors around the world mostly rely on human insight and processing to determine and interpret these ECG graphs. This process is thus often prone to human error introduced to the increasing cognitive burden of doctors and might introduce delays in diagnosis, which could be fatal. Ongoing research has focused on the design of automated algorithms to accurately diagnose and speed up the process of analyzing and interpreting an ECG signal. In this paper, we present a novel approach that utilizes a neural network pipeline with Snapshot ensembling to enable automated Bradycardia detection from ECG signals. Before the modeling phase, a cross-correlation and segmentation method is used for detecting relevant features in the ECG signals, using which the detection performance is improved. The proposed approach gave good results, with around 95% accuracy and an AUC score of about 0.96, implying an efficient and accurate classification. © 2022, The Author(s), under exclusive licence to Bharati Vidyapeeth's Institute of Computer Applications and Management.
Deterministic seismic hazard analysis for Phuentsholing region of southern Bhutan considering local site effects
(Springer Science and Business Media Deutschland GmbH, 2022) Sengupta, S.; Sarkar, R.; Kolathayar, S.; Drukpa, D.
Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development of infrastructure over time, the safety of the residence and lifeline buildings becomes a matter of concern. Bhutan lies in the Himalayan mountain ranges, which is considered one of the most active regions for seismic events. The Indian seismic code, IS 1893-2016, has assigned Zone IV for the region, which signifies the large risk that exists for all the structures. Therefore, conducting a seismic hazard assessment for the site becomes extremely necessary before any major construction. The present study focusses to perform the deterministic seismic hazard analysis (DSHA) around certain points of interest in the town of Phuentsholing, in Bhutan. Furthermore, site-specific response spectra for Pipaldhara-1, Pipaldhara-2, Kabreytar-1, Kabreytar-2 and Phuentsholing town were plotted from the results of the DSHA. It is estimated that a peak ground acceleration ranging from 0.11 to 0.14 g can be anticipated at the level of bedrock in the study region. Response spectra were plotted for the ground level using appropriate soil-amplification coefficients, derived from the analyses in the DEEPSOIL program. © 2022, Springer Nature Switzerland AG.
Deterministic Seismic Hazard Analysis of Chittagong City and District, Bangladesh
(American Society of Civil Engineers (ASCE), 2021) Sengupta, S.; Kolathayar, S.
Chittagong District is one of the most significant and flourishing coastal regions in the southeastern part of Bangladesh. It lies in the active tectonic framework which has experienced several major earthquakes in the past. Due to its economic, cultural, and military significance, it is of utmost importance that the structures are safe from seismic hazards. Seismicity database of Mwâ‰¥3 from 1900 to 2020 has been used to provide extensive insight into historical earthquakes and also facilitate accurate predictions. The seismic sources have been adopted from the seismotectonic Atlas of India and adjoining regions with a control region of radius 500 km from the political boundary of Chittagong District. The Peak Ground Acceleration (PGA) values were computed at the bedrock level, surface level PGA was calculated using the NEHRP soil amplification relations for Chittagong City, and corresponding response spectrum was plotted. Using these PGA values, hazard contours for the Chittagong City and District have been developed for the ease of seismic design of structures in the future. Â© 2021 American Society of Civil Engineers (ASCE). All rights reserved.
Evaluation of liquefaction potential of soil at a power plant site in Chittagong, Bangladesh
(IGI Global journaleditor@igi-global.com, 2020) Sengupta, S.; Kolathayar, S.
This study presents an evaluation of liquefaction potential for combined cycle power plant site located in the Chittagong district, Bangladesh, using standard penetration test blow counts (SPT-N values). The peak ground acceleration (PGA) values at a bedrock level were estimated deterministically using both linear and point source models as well as different ground motion prediction equations (GMPEs). The surface level hazard was estimated using amplification factors for the soil conditions present and the response spectrum at the center of the plant site was plotted. The liquefaction potential for the site was arrived at by using the SPT-N values of 33 boreholes in the site and at every 3-meter interval from the ground level to a depth of 30 meters. The results from the LPI contours at successive depths indicate that in the majority of the borehole locations, the soil up to 15 meters depth had a significant hazard of liquefaction. These findings from the present study can prove to be crucial from the structural point of view, for any future construction activities in the area. © © 2020, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited.
Transformation framework for consistent evolution of uml behavioral elements into BPMN design element
(Springer New York, 2013) Chanda, J.; Kanjilal, A.; Sengupta, S.; Bhattacharya, S.
There are many software products that have been developed in the object-oriented paradigm. To incorporate the positive aspects of service-oriented paradigm (SOA) and address the issues related to increasing size and complexity of software products, they need to be evolved to service-oriented domain. There are some proven Object Oriented (OO) Design Tools that can be used for Service Oriented Application design incorporating both the behavioral and structural aspects in a seamless, consistent evolution that can be made from object oriented to service oriented domain. In this chapter, we concentrate on the evolution process of behavioral aspect of design from OO to SOA. Business Process Modeling Notation (BPMN) has become the de-facto standard for modeling business process on a conceptual level. Business processes are an integral part of service-oriented architecture. In service-oriented applications Use cases needs to be ordered along business processes. Business Processes visualize global control-flow across Use cases. Therefore, use of a business process language to visualize the dependencies among different use cases is of high importance. Use case diagram along with activity diagrams represents the behavioral aspect of a system in the analysis phase of an object-oriented system. To enable modeling the relationship among different behavioral aspects and evolve from object oriented domain to service oriented domain, a formal approach would help in establishing the foundation. In order to do that, in this work, we propose a formal framework, FAM (Formalized analysis model), which is a set of grammar based formalized Use case and Activity diagram elements of UML and a framework for verification of the diagrams, which includes syntactic correctness and requirement traceability. Along with that, we also propose FAM2BP (Formalized Analysis Model to Business Process) for transformation of Formalized Analysis Model (FAM) of object-oriented systems into BPMN process for SOA application using a set of rules that will help in generating business processes for SOA application directly from object oriented analysis models. This model would help in a consistent evolution of software development paradigms from Object Oriented to Service Oriented systems. © 2014 Springer Science+Business Media New York. All rights are reserved.