SEMINAR/TALK FACULTY:
Prof. Narayan Rangaraj gave an invited talk at S.P.Jain Institute of Management and Research on Sunday, 28th March, on "Service queuing, logistics strategy and network optimization" in a programme on Services Sciences,Management and Engineering.
Prof. Narayan Rangaraj gives talk in Workshop on ICT in Railways
Prof. Narayan Rangaraj gave a talk (along with U. Hari Prasad) titled "Enhanching use of IT in Indian Railways" on 3rd December in New Delhi at the workshop "ICT in Railways: Requirements and Solutions, Technologies and Applications" organised by Indian Infrastructure magazine in collaboration with the Centre for Infrastructure Policy and Regulation (Indian Institute of Management, Ahmedabad).
Prof Hemachandra gives talk at Risk Management workshop at ISB, Hyderabad
Prof. N. Hemachandra and IEOR research scholars Supriya Chitale, Vikas Vikram Singh attended the Operations Research and Data Analytics Workshop.
This Workshop was organised by Centre for Global Logistics and Manufacturing Strategies (GLAMS) of ISB and IBM India Research Laboratories, held from 19-20 November, 2009, at the Indian School of Business, Hyderabad. The theme of the workshop was Risk Management in an Uncertain World. Prof. N. Hemachandra delivered an invited talk at the workshop, titled "A Stochastic Game based Pollution Tax Model", based on his ongoing research work with Vikas Vikram Singh and Prof. Mallikarjuna Rao.
Talk by Prof Jayendran Venkateswaran
Dr Jayendran Venkateswaran (IEOR) gave a talk titled "Dynamic modeling of Coupled Natural-Human Systems" on Sept 23.
The talk was based on his recent field visit and initial research on a new project to do with the interaction of natural resources and renewable energy sources and rural livelihoods. The project is in collaboration with Washington University (St Louis, USA) and the Foundation for Ecological Security. The field visit was at Boyepalle in south west Andhra Pradesh, during August 2009. The talk also introduced systems dynamic modeling as a potential tool to be used in this exercise.
Prof Narayan Rangaraj gives talk at IIT Kanpur
Prof Narayan Rangaraj gave an invited talk on 4 September, on "Optimization applications in Railway Operations" at a DST sponsored workshop on Optimization theory and applications, held at IIT Kanpur. The workshop was organized by the Department of Mathematics and Statistics at IIT Kanpur and attended by doctoral and post graduate students from various institutions.
Talk by Vishnu Narayanan, Department of Industrial Engineering and Operations Research, UCB
Vishnu Narayanan, doctoral student in the department of Industrial Engineering and Operations Research, University of California at Berkeley, gave a seminar talk titled "Branch-and-Cut methods for Conic Mixed-Integer Programming" on 11 April 2007.
Abstract of talk : A conic integer program is an integer programming problem with conic constraints. Conic integer programs have inportant applications in finance, engineering, statistical learning, and probabilistic integer programming. Here we study mixed-integer sets defined by second-order conic constraints. We describe general purpose conic mixed-integer rounding cuts based on polyhedral substructures. These cuts can be readily incorporated in branch-and-bound algorithms. Our preliminary computational experiments show that these cuts are highly effective in reducing the integrality gap of the continuous relaxation. We also describe a process for lifting locally valid inequalities to obtain global valid inequalities. This procedure generalizes the lifting procedure for linear mixed-integer programs.
Prof. Narayan Rangaraj gives invited talk
Prof Narayan Rangaraj gave an invited talk "Customer oriented railway operations" on October 10 at a seminar organized by the Institute of Rail Transport and South Central Railway at Secunderabad.
Industrial Engineering & Operations Research, Indian Institute of Technology Bombay will be hosting the following SEMINARS on Wednesday, 4th October 2006 (4 pm onwards) in Room 217 @ ME Bldg. All are cordially invited to attend the seminars.
4.00 pm - 4.40 pm Jayendran Venkateswaran,
(Assistant Professor, IEOR programme, IIT Bombay)
Effect of Information Update Frequency on the Stability of Production-Inventory Control Systems
With modern supply chains hurtling towards "information overloading," it is of great interest to know how often the data needs to be updated. The inventory and production ordering policies among the players (Manufacturer and Distributors) of a two echelon supply chain are studied. System dynamics models of the different players are developed. Z-transform techniques are employed to derive the general stability condition. Stability of the supply chain under different strategies (communicative vs. vendor managed inventory) is appraised and their implications on the information synchronization needs are analyzed.
4.40 pm - 5.20 pm Narayan Rangaraj
(Professor, IEOR programme, IIT Bombay)
Dynamic balancing of inventories in retail supply chains
A distribution problem is solved, which has a supplier facing multiple retailers with different cost structures and demands. The solution is through dynamic programming, supplemented by appropriate heuristics. The work is partly motivated by RFID possibilities in retail supply chains.
5.20 pm - 6.00 pm Tapan P Bagchi
(Sr. Professor & Head, Operations SBU, Chair, Center for Project Management, S P Jain Institute of Management & Research, Mumbai)
Optimal Ground Support in Multi-Spacecraft Missions: Model Development and Results
This talk addresses the optimal allotment of ground station support time to low orbit (LEO) spacecraft with clashing visibilities. LEOs now form a critical global infrastructure for natural resource management, rescue, crop yield estimation, flood control, communication, and space research and travel support. In the multi-spacecraft scenario, ground support becomes complex because of satellite-specific constraints, station configuration, satellite priorities and priorities of payload and special operations. A generalization of the classical product mix problem, satellite support is NP-complete and more complex than the former because of arbitrarily defined profitability profile. The paper concludes with the illustration of real life satellite support optimization problems routinely faced by ISRO and how these were formulated and resolved.
Prof Narayan Rangaraj presents a talk at SIMC 2006
Prof Narayan Rangaraj presented a talk on Logistics Infrastructure for Container Operations in India - Models for Shared Resources, at SIMC 2006,the Summit on Indian Manufacturing Competitiveness: Global Manufacturing and Service Networks, at the Indian School of Business, Hyderabad on August 4, and also participated in a panel discussion during the event.The talk was based on work done jointly with Deepika Taneja (IEOR) and Jacques Burrus (Univ of California, Berkeley).
IEOR group participates in Workshop on e-Business
Prof Narayan Rangaraj was invited to give a talk on "Modeling in e-business and Supply Chain Management" at a Workshop on Frontiers of e-business organised by GM India Science Labs at the National Institute of Advanced Studies Auditorium, IISc, Bangalore, on Dec 8. Prof. Jayendran Venkateswaran, research scholar Mr. Sudhir Sinha and graduate students Mr. Braja Gopal Das and Mr. Sandeep Kale also attended the workshop, which featured 16 invited talks on the theme.
[The link for the paper on which Prof. Narayan Rangaraj's talk was based is http://www.me.iitb.ac.in/~narayan/conferences/nr-gm-8-dec-2005.pdf]
Date & Location: 31st Aug 2005, 5:00 pm, ME 201
Speaker: Dr. Jayendran Venkateswaran
Topic: "Production and Distribution Planning in Dynamic Supply Chains using Multi-Resolution Hybrid Models"
Abstract: Today, there is little understanding of how decisions and disturbances at individual members impact the global performance of the supply chain. This work describes the research carried out to gain insight about such relationships using multi-resolution hybrid models. To this end, a novel hybrid architecture and methodology consisting of simulation (system dynamic and discrete-event) and optimization modules, applicable to supply chain networks, is proposed. The proposed methodology, applicable to general supply chains, is divided into fours stages: plan stability analysis (Stage I), plan optimization (Stages II), schedule optimization (Stage III) and concurrent decision evaluation (Stage IV). For analysis, experimentation and demonstration, a realistic three-echelon conjoined supply chain system, significantly larger and more detailed than that used in previous research, characterized by both communicative and collaborative (vendor managed inventory) configurations and their variations are considered. A generic infrastructure has also been developed using High Level Architecture (HLA) to integrate the distributed decision and simulation models.