Indian Institute of Management Kozhikode
Indian Institute of Management Kozhikode
A.G. R.,Indian Institute of Management Kozhikode |
Abdulla M.S.,Indian Institute of Information Technology and Management Gwalior |
Asharaf A.S.,Indian Institute of Information Technology and Management Gwalior
Expert Systems with Applications | Year: 2017
Anomaly (or outlier) detection is well researched objective in data mining due to its importance and inherent challenges. An outlier could be the key discovery to be made from large datasets and the insights gathered from them could be of significance in a wide variety of domains like information security, business intelligence, clinical decision support, financial monitoring etc. Recently, Support Vector Data Description (SVDD) driven approaches are shown as having good predictive accuracy. This paper proposes a novel low-complexity anomaly detection algorithm based on Support Vector Data Description (SVDD). The proposed algorithm reduces the complexity by avoiding the calculation of Lagrange multipliers of an objective function, instead locates an approximate pre-image of the SVDD sphere's center, within the input space itself. The crux of the training algorithm is a gradient descent of the primal objective function using Simultaneous Perturbation Stochastic Approximation (SPSA). Experiments using datasets obtained from UCI machine learning repository have demonstrated that the accuracies of the proposed approach are comparable while the training time is much lesser than Classical SVDD. © 2017 Elsevier Ltd
Gopinath S.,Indian Institute of Management Kozhikode
International Journal of Project Management | Year: 2016
Project management as a discipline possesses a rich body of literature characterized by early determinism and later expansion to broader contexts aided by paradigmatic, thematic, and methodological diversity. The dynamic nature of research entails many parallel streams of enquiry under differing perspectives without convergence to parsimonious theories. We argue that an integrated view of project management research in terms of its thematic evolution and trends is necessary for an understanding of future directions. Our study fills this gap by tracing the evolution of themes in project management research, trends, and future opportunities through a systematic review of literature. We find the research to be dominated by empirical and deterministic perspectives while non-deterministic research enquiry remains weak and sporadic. We contend that stronger focus on non-deterministic perspective and a methodological convergence is necessary for the research to meaningfully advance towards theory building, and discuss potential avenues for further research. © 2016 Elsevier Ltd and Association for Project Management and the International Project Management Association
Shukla M.,Indian Institute of Management Kozhikode |
Jharkharia S.,Indian Institute of Management Kozhikode
International Journal of Operations and Production Management | Year: 2013
Purpose: The purpose of this paper is to present a literature review of the fresh produce supply chain management (FSCM). FSCM includes the processes from the production to consumption of fresh produce (fruits, flowers and vegetables). Design/methodology/approach: Literature review is done by systematically collecting the existing literature over a period of 20 years (1989-2009) and classifying it on the basis of structural attributes such as problem context, methodology and the product under consideration. The literature is also categorized according to the geographic region and year of publication. Findings: There is an increase in interest towards FSCM still there is an absence of a journal with the prime attention towards FSCM. The key finding of this review is that the main interest is towards consumer satisfaction and revenue maximization with post-harvest waste reduction being a secondary objective. It is revealed from the review that most of the literature is fragmented and is in silos. Lack of demand forecasting, demand and supply mismatch, lesser integrated approach etc are the major causes of concerns. Research limitations/implications: The authors have taken only the fresh produce (fruits, flowers and vegetables), authors may also look at other perishable items such as milk, meat, etc. Practical implications: Result shows a product-problem-methodology mapping which may serve as a framework for the managers addressing issues in FSCM. Originality/value: Most of the prior literature reviews are focused on a specific issue such as production planning or inventory management and ignore the broader perspective. There exists a need of having a detailed literature review covering all the operational issues in FSCM. This review fills this gap in the FSCM literature. © Emerald Group Publishing Limited.
Raju C.,Indian Institute of Management Kozhikode
AIP Conference Proceedings | Year: 2016
In this article, the outgoing quality (OQ) and total inspection (TI) of multiple deferred state sampling plans MDS-1(c1,c2) are studied. It is assumed that the inspection is rejection rectification. Procedures for designing MDS-1(c1,c2) sampling plans with minimum variance of OQ and TI are developed. A procedure for obtaining a plan for a designated upper limit for the variance of the OQ (VOQL) is outlined. © 2016 Author(s).
Narayana S.A.,Indian Institute of Management Kozhikode |
Pati R.K.,Indian Institute of Management Kozhikode |
Vrat P.,Management Development Institute
International Journal of Pharmaceutical and Healthcare Marketing | Year: 2012
Purpose: This paper aims to present a review of literature to assess the progress of research on managerial issues in the pharmaceutical industry globally. Design/methodology/approach: Literature from peer-reviewed journals available on online databases was collected for the last decade, using the keyword search technique, and then classifying it according to major managerial issues, research methodologies used and geographical zones. Findings: Behavioral issues at the consumer/physician level and non-behavioral issues in pricing and medical expenses are studied the most, followed by supply chain management, research and development and manufacturing and services operations management. There is scope for conjunction of research efforts across themes and players. The studies focus on the developed nations through the application of field research and mathematical modeling techniques. The studies in the American region focus more on development and marketing while studies in Europe are aligned towards manufacturing and distribution in the industry. Studies in the developing nations are mostly exploratory in nature and require more focus on issues of research and development and marketing in addition to a substantial increase in overall research efforts. More trans-continental studies are needed to consolidate research efforts globally. Research limitations/implications: The review is not exhaustive of all studies available on the industry and each of the issues. Conference papers, unpublished material and lectures were excluded. Practical implications: Identification of the present and emerging issues together provides practitioners in healthcare systems with an idea of available techniques and strategies to solve problems in healthcare/pharmaceutical management. Originality/value: A study on research of management issues in the pharmaceutical industry across the world has perhaps not been conducted in the recent past: this paper fills part of that gap. © Emerald Group Publishing Limited.
Chowdhury S.,Indian Institute of Management Kozhikode |
Mukherjee A.,Production |
Chakraborti S.,University of Alabama
Quality and Reliability Engineering International | Year: 2015
A single distribution-free (nonparametric) Shewhart-type chart on the basis of the Lepage statistic is well known in literature for simultaneously monitoring both the location and the scale parameters of a continuous distribution when both of these parameters are unknown. In the present work, we consider a single distribution-free cumulative sum chart, on the basis of the Lepage statistic, referred to as the cumulative sum-Lepage (CL) chart. The proposed chart is distribution-free (nonparametric), and therefore, the in-control properties of the chart remain invariant and known for all continuous distributions. Control limits are tabulated for implementation of the proposed chart in practice. The in-control and out-of-control performance properties of the cumulative sum-Lepage (CL) chart are investigated through simulation studies in terms of the average, the standard deviation, the median, and some percentiles of the run length distribution. Detailed comparison with a competing Shewhart-type chart is presented. Several existing cumulative sum charts are also considered in the performance comparison. The proposed CL chart is found to perform very well in the location-scale models. We also examine the effect of the choice of the reference value (k) on the performance of the CL chart. The proposed chart is illustrated with a real data set. Summary and conclusions are presented. Copyright © 2014 John Wiley & Sons, Ltd.
Sidharth S.,Center for Artificial Intelligence and Robotics |
Sebastian M.P.,Indian Institute of Management Kozhikode
ACE 2010 - 2010 International Conference on Advances in Computer Engineering | Year: 2010
The WiMAX IEEE 802.16 (e) is defined as the Worldwide Interoperability for Microwave Access by the WiMAX Forum, formed in April 2001 to promote conformance and interoperability of the IEEE 802.16 standard, officially known as WirelessMAN. The absence of physical boundaries makes in general a wireless network more vulnerable than a wired network. The IEEE 802.16 provides a security sublayer in the MAC layer to address the privacy issues across the fixed BWA (Broadband Wireless Access). Several proposals have been published to address the flaws in IEEE802.16 security after the release of IEEE802.16-2001. However, even with the modified version IEEE802.16-2004, the security problems still persist and many additional flaws have emerged. This paper examines the threats against the authentication protocols of WiMAX and proposes a new authentication protocol which is more reliable and secure. The proposed protocol is rigid against the attacks like Denial of service (DOS), Man-in-the-middle and replay. © 2010 IEEE.
Balooni K.,Indian Institute of Management Kozhikode |
Balooni K.,Wageningen University |
Lund J.F.,Copenhagen University
Conservation Letters | Year: 2014
One of the proposed strategies for implementation of reducing emissions from deforestation and forest degradation plus (REDD+) is to incentivize conservation of forests managed by communities under decentralized forest management. Yet, we argue that this is a challenging road to REDD+ because of three general characteristics of forests under existing decentralized management regimes. First, these forests already accumulate biomass and, in some cases, generate leakage, which threatens to undercut REDD+ additionality. Second, these forests are many and small, which will drive up REDD+ transactions costs. Third, beyond the "conservation islands" represented by forests under decentralized management, processes of deforestation and forest degradation continue. Given these challenges, we argue that REDD+ efforts through decentralized forestry should be redirected from incentivizing further conservation of forests under existing decentralized management arrangements toward a push for extending the coverage of forests under decentralized management, making forest rights the hard currency of REDD+. © 2013 Wiley Periodicals, Inc.
Thangamani G.,Indian Institute of Management Kozhikode
International Journal of Performability Engineering | Year: 2013
This paper deals with the availability analysis of a Cooling Tower used in an air conditioning system. The system is modeled as a Generalized Stochastic Petri Net (GSPN) and analyzed using Monte Carlo Simulation method. The superiority of this approach over others is demonstrated. The proposed GSPN is a promising tool that can be conveniently used to model and analyze any complex systems. It is a promising tool for modeling and estimation of reliability measures of any process plants. © RAMS Consultants.
Bhaskaran S.,Indian Institute of Management Kozhikode
British Food Journal | Year: 2013
Purpose: The aim of this paper is to present ex-post and ex-ante analysis of the outcomes of ICT adoption in six food processing SMEs based on needs analyses conducted through business diagnostics. Design/methodology/approach: Six food processing SMEs were selected and subsidized to introduce ICT on condition that the SMEs agree to conduct business diagnostics to identify ICT needs, adopt ICT capabilities recommended, agree to outcomes being monitored and the findings being published. Findings: Two amongst the six rigorously selected SMEs did not complete the project citing resource constraints, reveals constraints experienced by SMEs in adopting "new" technology. Four SMEs that completed the project achieved increased operating efficiency or business growth, demonstrating the benefits of ICT adoption. The study concludes that rigorous business analysis is an important precursor to ICT adoption initiatives and SME resource constraints in such initiatives can be successfully overcome through enterprise-government-university partnerships. Research limitations/implications: A longitudinal study, a larger sample size and quantitative data gathering would embellish the findings. Practical implications: ICT adoption is a cost-efficient strategy to facilitate business growth and profitability in SMEs. Because many SMEs may not have appropriate technical and managerial capabilities, enterprise-government-university partnerships are a useful model to undertake such initiatives. Knowledge and methodology from this study could inform public policy action to encourage "new" technology adoption by SMEs. Originality/value: The paper presents a project completed through intervention methodology (selectively recruiting SMEs, diagnosing business and strategic intents, identifying ICT capabilities needs, assisting SMEs adopt customized ICT capabilities) and tracking the outcomes © Emerald Group Publishing Limited.