Faculty Publications
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Publications by NITK Faculty
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Item Methodological and parametric studies of machinability of carbon and alloy steels(2013) Lalbondre, R.; Krishna, P.; Mohan Kumar, G.C.The carbon and alloy steels form an increasingly diverse variety and range of steels in manufacturing industries. The assessment of the machinability of an engineering material becomes a matter of prime activity to improve productivity. The machinability of carbon and alloy steels is affected by many factors, such as the composition, microstructure, and strength level of the steel; the feeds, speeds, and depth of cut; and the choice of cutting fluid, cutting tool material and its geometry. Thus the machinability is an intrinsic technological property which is complex to understand and difficult to determine. This paper discusses different methodology of determining the machinability and its rating/index. One of the methodologies, the face turning method in particular, shall be used to determine the machinability of carbon and alloy steel. Further it deals with identifying the appropriate cutting parameters to test the machinability in an effective, simple and easy way. The research work findings here provide useful economic machining solution of knowing, in advance, the machinability of steels to gain and maintain a competitive advantage. © 2013 CAFET-INNOVA TECHNICAL SOCIETY.Item Congestion control performance investigation of ModQUIC protocol using JioFi network: A case study(IOS Press Nieuwe Hemweg 6B Amsterdam 1013 BG, 2020) Kharat, P.; Kulkarni, M.Quick UDP Internet (QUIC) protocol is a transport and application layer solution developed by Google, which is the strong competitor to popular and well established Transmission Control Protocol (TCP). The QUIC protocol is being updated faster resulting into many new versions of the protocol. In this paper, the performance of Modified QUIC (ModQUIC) protocol has been tested with respect to congestion control using India's rapidly growing Internet service provider, the Reliance Jio 4G network (JioFi), which has captured 17% of the market share in a short time. This experimental study investigated ModQUIC protocol performance with congestion control mechanisms CUBIC and Bottleneck Bandwidth Round-trip-propagation-time (BBR) in the JioFi network. The experiment is conducted using a testbed, developed with JioFi and RaspberryPi-3 wireless router along with network emulator: Netem. The ModQUIC performance is verified using test video files stored on Google drive. The performance is tested in packet loss and packet reorder situations using metrics, Throughput and Retransmission Ratio (RTR). We observed that overall ModQUIC/BBR performance is better than ModQUIC/CUBIC in the current Internet. We observed that Reliance Jio is an economical solution for highly populated countries like India, but not a contemporary solution to fulfill India's newly launched digitization project. © 2020 - IOS Press and the authors. All rights reserved.Item Customer Experience in Social Commerce: Thematic and Intellectual Structure Mapping Using Bibliometric Analysis(Taylor and Francis Ltd., 2024) Dhaigude, S.A.; Mohan, B.C.The customer experience (CX) in Social Commerce (SC) as a research area gained momentum in two decades after scholars discovered its influential role in loyalty, repurchase intention, competitive advantage, and overall firm performance. Importantly CX, despite being a frequently studied topic, a thorough bibliometric study of the CX construct in the context of SC has never been studied; we look to cover this lacuna in literature. Specifically, this study aims to use bibliometric evaluation to gain a comprehensive interpretation of CX in the SC context. We collated one hundred sixteen articles from Scopus and Web of Science. Then, we combined bibliographic coupling and keyword analysis to map the scientific evolution of the CX construct in SC. We found five clusters using a bibliographic coupling, following a meticulous content analysis; they included: (1) CX and group buying, (2) CX and Swift guanxi, (3) CX and information support, (4) CX and emotional support, and (5) CX and Impulse buying. We believe that the findings would be helpful for decision-makers and policymakers who desire to improve their understanding of CX in SC, in addition to scholars working in the SC field. © 2022 Taylor & Francis Group, LLC.Item A neural network-based predictive decision model for customer retention in the telecommunication sector(Elsevier Inc., 2024) Thangeda, R.; Kumar, N.; Majhi, R.Acquiring a new customer is far more expensive than retaining a customer. Hence, customer retention is a key aspect of business for a firm to maintain and improve on its market share and profit. The paper analyses customer retention strategies by employing an artificial neural network-based decision model to a real-life dataset collected from 311 mobile service users in India. Seven linear and non-linear adaptive models are developed using features related to customer dissatisfaction (DSF), customer disloyalty (DLF) and customer churn (CF). Findings of this study suggest that non-linear models are most efficient in predicting customer churn, and both DSF and DLF variables significantly affect the retention strategy. Three groups of customers are discussed in this study in the order of least likelihood of churning to most likelihood. Finally, a priority matrix based on key performance indicators is proposed to help service providers target potential customers to retain. © 2024 The AuthorsItem Understanding the key factors of operating environment for small and medium contractors in the developing economies: the case of Ethiopia(Emerald Publishing, 2025) Bekele, A.; Mahesh, G.Purpose: Small and medium contractors (SMCs) play a significant role in socioeconomic development. Their strong links with other sectors of the economy have a multiplier effect on any country’s growth. However, the construction business, especially for SMCs, is not an easy business as several roadblocks affect their sustenance. This study aims to examine the factors affecting the sustainable competency of SMCs emerging from the business environment in which the Ethiopian construction industry (CI) operates. Design/methodology/approach: A literature review was conducted to identify 39 factors arising from five core sources (i.e. government policies, regulatory frameworks, industry networks, competitive bidding culture and construction technology and innovation). A questionnaire survey was conducted to gather industry stakeholders’ perceptions of the identified factors, and the results were analyzed using descriptive statistics. Findings: Findings indicate 37 significant factors affecting sustainable competency arising from five sources, and the top factors from their respective sources were unfavorable financial policy; unfavorable economic regulatory framework; lack of trust between parties in the industry; inability of SMCs to compete with bigger construction companies; and poor linkages between CI and research and development institutions. Furthermore, factor analysis identified 12 components, and the top ones were competition and uncertainties in the supply chain; unsuitable bidding environment; and ineffective industry networks. Originality/value: The findings will contribute to the body of knowledge on the factors affecting the sustainable competency of SMCs in the Ethiopian CI. They also indicate priority areas of competitiveness improvement and have implications for decision-makers. © 2023, Emerald Publishing Limited.