2015 Informs Annual Meeting

SA03

INFORMS Philadelphia – 2015

SA04 04-Room 304, Marriott JFIG Paper Competition I Sponsor: Junior Faculty Interest Group Sponsored Session

3 - A Branch and Cut Method for Solving the Bilevel Clique Interdiction Problem Timothy Becker, Rice University, 6100 Main Street, Houston, TX, 77005, United States of America, tjb5@rice.edu, Illya Hicks I introduce an algorithm to solve the current formulation of the bilevel clique interdiction problem. The problem defines a defender who attempts to minimize the number of cliques removed by an attacker. The algorithm presented in this talk uses a branch and cut approach to solve the proposed problem and give preliminary results. This algorithm is expected to be usable on any social network, thereby improving the study of many network problems including terrorist cells or marketing strategies. SA03 03-Room 303, Marriott Scheduling and Optimization in Logistics, Energy, Manufacturing Industries Cluster: Scheduling and Project Management Invited Session Chair: Lixin Tang, Professor, Northeastern University, Institute of Industrial Engineering and, Logistics Optimization, Shenyang, 110819, China, lixintang@mail.neu.edu.cn 1 - Integrated Production, Inventory and Delivery Problems: Complexity and Algorithms Zhi-Long Chen, Professor, University of Maryland, Robert H. Smith School of Business, College Park, MD, 20742, United States of America, zchen@rhsmith.umd.edu, Feng Li, Lixin Tang We consider integrated production, inventory and delivery scheduling problems that arise in practical settings where customer orders have delivery time windows, and are first processed in a plant and then delivered to the customers by transporters with fixed delivery departure times. We study their complexity by showing NP-hardness of a problem or giving polynomial-time algorithms. For two problems, we propose column generation based heuristics that can find near optimal solutions quickly. 2 - Smart Port Automation System Loo Hay Lee, National University of Singapore, Department of Industrial & Systems, Engineering, Singapore, iseleelh@nus.edu.sg, Ek Peng Chew In this talk we will present several innovative port automation concepts, which include the Frame-bridge system developed by ZPMC, Grid System developed by BEC, AGV system and the double storey container port system (SINGA port). SINGA port has won the grand prize of US$ 1 million for the next generation container port challenge. 3 - Scheduling a Single Batching Machine with Makespan and Total Rejection Cost Objectives Kangbok Lee, York College, CUNY, York College, The City University of New York, Jamaica, NY, 11451, United States of America, klee5@york.cuny.edu, Cheng He, Joseph Leung, Michael Pinedo We consider a single batching machine scheduling problem with rejection being allowed. Two bi-criteria problems are considered: (a) minimize makespan with a given threshold of the total rejection cost, and (b) minimize the total rejection cost with a given threshold of makespan. For problem (a) we present an O(n2)- time 2-approximation algorithm and for both problems (a) and (b) we provide dynamic programming algorithms and fully polynomial-time approximation schemes. 4 - Production, Logistics and Energy Scheduling in the Steel Industry Lixin Tang, Professor, Northeastern University, Institute of Industrial Engineering and, Logistics Optimization, Shenyang, 110819, China, lixintang@mail.neu.edu.cn We discuss three scheduling problems in steel industry: 1) production scheduling in steel-making and hot/cold rolling operations; 2) logistics scheduling in storage/stowage, shuffling, transportation and (un)loading operations; 3) energy analytics and scheduling including energy consumption estimation, energy diagnosis and benchmarking, energy prediction and dynamic energy allocation. Some on-going interesting topics on coordinated scheduling of production, logistics and energy are discussed.

Chair: Asoo Vakharia, Professor, University of Florida, Department of ISOM, Gainesville, FL, 32611, United States of America, asoov@ufl.edu Co-Chair: Arda Yenipazarli, Assistant Professor of Operations Management, Georgia Southern University, COBA 2224, Statesboro,

GA, 30460, United States of America, ayenipazarli@georgiasouthern.edu 1 - JFIG Paper Competition I

The 2015 JFIG paper competition features paper submissions from a diverse array of talented junior faculty members. The prize committee evaluated submissions based on the importance of the topic, appropriateness of the approach, and significance of the contribution. After careful review, the prize committee selected a group of finalists to present their research in one of the two JFIG sessions. For information on the finalists and their papers, please refer to the online program. SA05 05-Room 305, Marriott Scalable Business Analytics in Social Media Cluster: Social Media Analytics Invited Session Chair: Kunpeng Zhang, Assistant Professor, University of Maryland, College Park, Maryland, College Park, United States of America, kpzhangs@gmail.com 1 - Assessing Factors that Drive People to Invest in Crowdfunding Projects Yuheng Hu, Assistant Professor, University of Illinois at Chicago, 601 S Morgan St, Chicago, IL, United States of America, yuhenghu@gmail.com Crowdfunding platforms have gained popularity in recent years. However, little is known about the factors driving people to invest in crowdfunding projects. In this paper, we examine factors associated with three different perspectives that drive people’s investment in over 6K funded projects on Kickstarter: 1) founder’s personality, 2) founder’s social network, and 3) project-based factors. We find that people’s personality and the project topics variously affect the investment choices. 2 - Production Diffusion and Identity Signaling on Social Shopping Platforms De Liu, Associate Professor, University of Minnesota Twin Cities, deliu@umn.edu, Pei Xu We study the diffusion of products on social shopping platforms, where consumers can endorse the products they discover and like and follow one another’s endorsements. We find that the diffusion of product endorsements is consistent with the identity-signaling model. Consumers endorse products endorsed by their aspiration groups (whom they follow) but avoid products endorsed by the crowd. 3 - Winning Strategies in Dynamic Innovation Tournaments Jie Zhang, Associate Professor, University of Texas, Arlington, 701 S West St. Box 19437, Arlington, TX, 76019, United States of America, jiezhang@uta.edu, Indika Dissanayake Innovation tournaments have become a popular method of finding creative solutions. Using weekly contest data collected from an innovation tournament platform, we studied the winning strategies of solvers in a dynamic tournaments setting. Our analyses suggest that solvers strategically exert efforts over time to enhance their probability of winning. Furthermore, teams strategically merge with other team to enhance their chances of winning. 4 - On the Stormy Side of Twitter: The Role of the Network in Public Engagement with Climate Change Lauren Rhue, Visiting Assistant Professor, Wake Forest Univesity, 1834 Wake Forest Road, Farrell Hall 235, Building 60, Winston- Salem, NC, 21706, United States of America, rhuela@wfu.edu, Graham Gottlieb, Irina Feygina Our study examines millions of tweets from TV meteorologists’ accounts to understand the influence of meteorologists’ network positions, the tweet sentiment, and major weather events on the public engagement with weather and climate change. We find that the effectiveness of their tweets, measured by retweets and favorites, is affected by all these drivers and that negativity and disasters sparks interest in the weather.

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