Browsing by Author "Sivakumar, K."

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    Assessing for Online Teaching Effectiveness Using VIKOR Method During Covid Pandemic Times
    (Springer Science and Business Media Deutschland GmbH, 2024) Vadivel, S.M.; Sivakumar, K.; Praveena, L.; Sequeira, A.H.; Abhinav, A.
    The aim of this article is to evaluate the three university students, X, Y, and Z, by analysing their online effective teaching using the VIšekriterijumsko KOmpromisno Rangiranje (VIKOR) approach. Identifying appropriate characteristics (surveys) that affect the online teaching assessment, such as instructional strategies, learning environments, teacher-student engagement, video quality, assessment of instruction, learning impact, and level of home-college collaboration. This poll will be helpful in assessing these colleges’ comprehension of online courses taught during pandemics. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
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    Recovery and Partial Purification of Bovine ?-Lactalbumin from Whey Using PEG 1000 Trisdoium Citrate Systems
    (2015) Sivakumar, K.; Regupathi, I.
    The extraction of ?-Lactalbumin (?-La) and ?-Lactoglobulin (?-Lg) from whey have been carried out in the Aqueous Two Phase System (ATPS) composed of PEG 1000 tri sodium citrate. The suitable conditions for the simultaneous partitioning of ?-La into the top phase and ?-Lg in bottom phases was identified using the pure ?-La and ?-Lg. Maximum partition coefficient (k) of 16.67 was achieved for ?-La at the system condition of 28% (w/w) PEG 1000-14% (w/w) tri sodium citrate at pH 8 and 40 C, whereas in this condition k of ?-Lg is 0.27. 30% (w/w) whey loaded to this system yielded the maximum recovery of ?-La and ?-Lg. , Copyright Taylor & Francis Group, LLC.
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    Recovery and Partial Purification of Bovine ?-Lactalbumin from Whey Using PEG 1000 – Trisdoium Citrate Systems
    (Taylor and Francis Inc. 325 Chestnut St, Suite 800 Philadelphia PA 19106, 2015) Sivakumar, K.; Iyyaswami, R.
    The extraction of ?-Lactalbumin (?-La) and ?-Lactoglobulin (?-Lg) from whey have been carried out in the Aqueous Two Phase System (ATPS) composed of PEG 1000 – tri sodium citrate. The suitable conditions for the simultaneous partitioning of ?-La into the top phase and ?-Lg in bottom phases was identified using the pure ?-La and ?-Lg. Maximum partition coefficient (k) of 16.67 was achieved for ?-La at the system condition of 28% (w/w) PEG 1000-14% (w/w) tri sodium citrate at pH 8 and 40°C, whereas in this condition k of ?-Lg is 0.27. 30% (w/w) whey loaded to this system yielded the maximum recovery of ?-La and ?-Lg. © , Copyright © Taylor & Francis Group, LLC.
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    Self-Adaptive Circuit Breaker Open-State Interval for Enhancing Resiliency of Microservices
    (Institute of Electrical and Electronics Engineers Inc., 2024) Sivakumar, K.; Sebastian, J.; Santhi Thilagam, P.S.
    In recent years, microservice architecture has garnered substantial traction, highlighting the critical role of resilience patterns in ensuring robust system performance under adverse conditions. Among the principal techniques for failure management within microservices is the circuit breaker pattern, a vital component for maintaining system integrity. Enhancing its resilience continues to be a significant challenge. Various methodologies have been proposed to optimize circuit breakers by tweaking different parameters. However, the open state interval parameter-during which dependent services await the recovery of the disrupted service-has traditionally remained static. This work tackles this issue by introducing a dynamic adjustment mechanism for the open-state interval of circuit breakers. The empirical results indicate that this dynamic adjustment significantly boosts the number of successful requests by optimizing resource allocation, enhancing throughput, and mitigating cascading failures across service replicas. By adapting the open state interval in response to real-time conditions, the system can better manage variable loads and failures, thereby improving overall performance and stability in microservice architectures. © 2024 IEEE.
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    Vulnerability Testing of RESTful APIs Against Application Layer DDoS Attacks
    (Science and Information Organization, 2025) Sivakumar, K.; Santhi Thilagam, P.S.
    In recent years, modern mobile, web applications are shifting from monolithic application to microservice based application because of the issues such as scalability and ease of maintenance.These services are exposed to the clients through Application programming interface (API). APIs are built, integrated and deployed quickly.The very nature of APIs directly interact with backend server, the security is paramount important for CAP. Denial of service attacks are more serious attack which denies service to legitimate request. Rate limiting policies are used to stop the API DoS attacks. But by passing rate limit or flooding attack overload the backend server. Even sophisticated attack using http/2 multiplexing with multiple clients leads severe disruptions of service. This research shows that how sophisticated multi client attack on high workload end point leads to a dos attack. © (2025), (Science and Information Organization). All rights reserved.