Article
Management
Pawel Kalczynski, Zvi Drezner
Summary: The paper focuses on the obnoxious facility location problem, which aims to locate facilities that have a negative impact on communities. The goal is to minimize the operating cost of the system while ensuring a minimum distance from communities. The paper proposes a special starting solution method to improve the objective values of non-linear solvers for this non-convex problem.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2022)
Article
Operations Research & Management Science
Pawel Kalczynski, Zvi Drezner
Summary: This paper introduces the planar obnoxious facilities p-median problem and proposes an efficient solution method based on Voronoi diagrams. The efficient frontiers of the test problems are constructed to demonstrate the trade-off between the required distance and the p-median objective, aiding planners in making location decisions.
Review
Computer Science, Interdisciplinary Applications
Richard L. Church, Zvi Drezner
Summary: This paper reviews research on the location of obnoxious facilities, emphasizing problem types, solution methods, and historical roots.
COMPUTERS & OPERATIONS RESEARCH
(2022)
Article
Management
Thomas Byrne, Jorg Kalcsics
Summary: The study explores the impact of barriers on bisectors of facilities and the changes in Voronoi diagram caused by the movement of additional facility, leading to a polynomial exact algorithm using incremental Voronoi diagram and first order optimality conditions to find exact solutions within market space.
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2022)
Article
Operations Research & Management Science
Pawel Kalczynski, Zvi Drezner
Summary: The multiple obnoxious facilities location problem is a highly challenging non-convex optimization problem, where the community is challenged to design procedures to further improve the results and achieve optimality for a large number of facilities.
OPTIMIZATION LETTERS
(2022)
Article
Mathematics, Applied
Igor Averbakh, Oded Berman, Jorg Kalcsics, Dmitry Krass
Summary: This study focuses on conditional facility location problems with unreliable facilities, presenting polynomial algorithms based on the analysis of exponential family of incremental Voronoi diagrams. The approach can be extended to various other conditional location problems with continuous demand and unreliable facilities under different probabilistic models.
DISCRETE APPLIED MATHEMATICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Victor Blanco, Ricardo Gazquez
Summary: This paper analyzes a continuous version of the maximal covering location problem and proposes a mathematical programming framework as well as different resolution strategies, including two branch-and-cut approaches and a math-heuristic algorithm. Results of extensive computational experiments comparing performance are reported.
COMPUTERS & OPERATIONS RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Mohammad Ebrahim Tayebi Araghi, Reza Tavakkoli-Moghaddam, Fariborz Jolai, Seyyed Mohammad Hadji Molana
Summary: The GSOLRP combines location-routing problem and green vehicles to reduce costs by minimizing CO2 emissions in production systems. Robust optimization approach and hybrid meta-heuristic method are used to solve large-scale problems efficiently.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Computer Science, Theory & Methods
Daniel Marx, Michal Pilipczuk
Summary: The study focuses on a general family of facility location problems on planar graphs and the two-dimensional plane, proposing an optimized algorithm to select k objects in a shorter amount of time.
ACM TRANSACTIONS ON ALGORITHMS
(2022)
Article
Chemistry, Multidisciplinary
Roghayyeh Alizadeh, Tatsushi Nishi, Jafar Bagherinejad, Mahdi Bashiri
Summary: The paper investigates a multi-period maximal covering location problem with various types of facilities, showcasing applications in disaster relief, hospitals, and supermarkets. The proposed model accounts for the movement of different-sized modules between facilities based on demand variations. Results indicate that a combination of LD method and heuristic approach yields better performance.
APPLIED SCIENCES-BASEL
(2021)
Article
Multidisciplinary Sciences
Yogyata Pathania, Dipanjan Chakraborty, Felix Hoefling
Summary: This study compares different paths to the critical temperature when approaching the critical composition in a symmetric binary liquid, utilizing finite-size scaling analysis and simulations. It is found that for open systems and sub-volumes with boundary interference, the use of a two-parameter finite-size scaling method can address the difficulties present.
ADVANCED THEORY AND SIMULATIONS
(2021)
Article
Automation & Control Systems
Mahdi Mokhtarzadeh, Reza Tavakkoli-Moghaddam, Chefi Triki, Yaser Rahimi
Summary: This study develops a novel p-mobile hub location-allocation problem and proposes a multi-objective mixed-integer non-linear programming model to solve it. Implementing mobile hubs can reduce the costs of opening and closing hubs, but it also reduces facility lifespan and adds relevant costs.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2021)
Article
Engineering, Industrial
Masoud Hatami Gazani, Seyed Armin Akhavan Niaki, Seyed Taghi Akhavan Niaki
Summary: The study considered a maximal covering location problem with real-world constraints, and developed a mixed integer linear programming model and heuristic methods based on genetic algorithms to solve the NP-hard problem. Computational results showed that the heuristic method could produce optimal or near-optimal solutions within a reasonable execution time.
INTERNATIONAL JOURNAL OF INDUSTRIAL ENGINEERING COMPUTATIONS
(2021)
Article
Chemistry, Physical
C. Taber Wanstall, Joshua A. Bittle, Ajay K. Agrawal
Summary: A robust methodology for developing phase diagrams of binary fluid mixtures at fixed thermodynamic conditions and of two initially separated fluids undergoing mixing near critical conditions is presented in this study. This methodology is particularly relevant to various practical applications, such as rockets, gas turbines, and diesel engines.
JOURNAL OF SUPERCRITICAL FLUIDS
(2023)
Article
Computer Science, Artificial Intelligence
Ahmed Awad, Amjad Hawash, Baker Abdalhaq
Summary: The use of binary decision diagrams (BDDs) has been widely adopted in various fields. Constructing the BDD of a Boolean function allows for its analysis. However, the size of the BDD can be reduced by applying proper variable reordering and reduction rules while preserving its fidelity. Algorithms have been proposed for finding optimal variable orders, but their scalability is limited in complex systems. This article proposes a BDD optimizer driven by either a genetic algorithm or swarm engines, which effectively reduces the BDD size with linear computational complexity.
IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION
(2023)
Article
Computer Science, Hardware & Architecture
N. C. Cruz, S. Salhi, J. L. Redondo, J. D. Alvarez, M. Berenguel, P. M. Ortigosa
JOURNAL OF SUPERCOMPUTING
(2019)
Article
Management
Masoud Shahmanzari, Deniz Aksen, Said Salhi
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2020)
Article
Management
Zvi Drezner, Pawel Kalczynski
INTERNATIONAL TRANSACTIONS IN OPERATIONAL RESEARCH
(2020)
Article
Management
Mouaouia Cherif Bouzid, Said Salhi
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2020)
Article
Operations Research & Management Science
Chandra Ade Irawan, Said Salhi, Kusmaningrum Soemadi
JOURNAL OF GLOBAL OPTIMIZATION
(2020)
Article
Transportation
Ilkyeong Moon, Said Salhi, Xuehao Feng
TRANSPORTMETRICA A-TRANSPORT SCIENCE
(2020)
Article
Computer Science, Artificial Intelligence
Said Salhi, Brian Gutierrez, Niaz Wassan, Shaomin Wu, Rukiye Kaya
EXPERT SYSTEMS WITH APPLICATIONS
(2020)
Editorial Material
Management
John Boylan, Martin H. Kunc, Said Salhi, Zhe George Zhang
JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY
(2021)
Article
Management
Masoud Shahmanzari, Deniz Aksen, Said Salhi
Summary: This paper discusses the multi-period travelling politician problem and proposes a hybrid metaheuristic method to solve it, which outperforms other methods in experimental results. The paper provides valuable practical insights that can assist campaign planners in making strategic decisions.
JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY
(2022)
Article
Physiology
Raoua Triki, Hassane Zouhal, Hamdi Chtourou, Iyed Salhi, Nidhal Jebabli, Ayoub Saeidi, Ismail Laher, Anthony C. Hackney, Urs Granacher, Abderraouf Ben Abderrahman
Summary: This study investigated the effects of timing of resistance training (RT) during Ramadan intermittent fasting (RIF) on muscle strength and hypertrophy in healthy male adults. The results suggest that practicing RT during RIF does not have adverse effects on muscle hypertrophy and strength, regardless of whether it is done in a fed or fasted state. However, RT has greater effects on muscle strength when done in a fed state. Therefore, training sessions during Ramadan should be scheduled after breaking the fast.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2023)
Article
Business
Huamao Wang, Yumei Yao, Said Salhi
TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE
(2020)
Article
Social Sciences, Mathematical Methods
Tammy Drezner, Zvi Drezner, Pawel Kalczynski
COMPUTATIONAL MANAGEMENT SCIENCE
(2020)
Article
Green & Sustainable Science & Technology
Malgorzata Miklas-Kalczynska, Pawel Kalczynski
INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION
(2020)
Proceedings Paper
Physics, Applied
N. C. Cruz, S. Salhi, J. L. Redondo, J. D. Alvarez, M. Berenguel, P. M. Ortigosa
14TH INTERNATIONAL GLOBAL OPTIMIZATION WORKSHOP (LEGO)
(2019)
Article
Management
Hengyu Liu, Kai Zheng
Summary: Since August 2018, African swine fever (ASF) has caused over one million pig deaths in China and led to a surge in pork prices. To address this issue, the Chinese government has implemented two farm subsidies: the compulsory culling subsidy (CCS) and the large-scale breeding subsidy (LBS). Through a game-theoretic model, the study explores the optimal design of these subsidy programs and their impacts on different stakeholders.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Reza Azad Gholami, Leif Kristoffer Sandal, Jan Uboe
Summary: This paper investigates a decentralized supply channel where a manufacturer and a retailer compete in a multi-period discrete time setting, addressing uncertain demand through dynamic channel optimization. The paper proposes solution algorithms and theorems that highlight the benefits of postponement strategies for the follower and potential harm for the manufacturer in a decentralized channel.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Anne G. Balter, Ki Wai Chau, Nikolaus Schweizer
Summary: This study examines whether the threshold parameter in the Omega ratio represents risk aversion by analyzing the asymptotic expansions for risk premia. The results suggest that the threshold in the Omega ratio represents risk aversion when the variance of the additional risk decreases with the background risk and when the density of the background risk is log-concave. Comparisons with expected utility criteria indicate that the conditions for the Omega threshold to represent risk aversion are comparable to those for exponential utility functions.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Baozhuang Niu, Fengfeng Xie, Lei Chen
Summary: This paper examines the strategic sourcing decisions of a local brand (BOP) when purchasing remanufactured components from a local supplier (LSP). The study finds that the BOP tends to decrease its purchasing orders from the LSP when the probability of overseas supply disruption is high, while the LSP is willing to sell components to the BOP when the probability is in a moderate range.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Chiang Kao
Summary: This study develops a model to calculate the maximum SBM efficiency for general network production systems, and applies it to a garment manufacturing company. The results show that the sewing operation contributes more to the system efficiency than the cutting operation does.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Baozhuang Niu, Jiayun Liu, Jianhua Zhang, Kanglin Chen
Summary: This study examines a brand's decision on reselling through a platform by using game-theoretical analysis and big data validation based on transaction-level data from JD.com. The study finds that the platform's channel advantage and high logistics service level encourage brands to choose the reselling mode, and the impact of the platform's private label competition is non-monotonic.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Ali Fereydooni, Sasan Barak, Seyed Mehrzad Asaad Sajadi
Summary: This study develops an online portfolio selection strategy that considers Environmental, Social, and Governance factors in addition to return and risk. The results indicate the superiority of the approach that considers Environmental, Social, and Governance factors in terms of profit, volatility, and the highest deflated Sharpe ratio.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Sally Giuseppe Arcidiacono, Salvatore Corrente, Salvatore Greco
Summary: This paper introduces a method to handle multiple compatible value functions in multi-criteria decision making by building a probability distribution. Stochastic multicriteria acceptability analysis provides statistical information based on the decision maker's preferences. Extensive simulations and sensitivity analysis have been conducted to demonstrate the superiority of the proposed method.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Junlin Chen, Zewu Jiang, Xiaobo Zhao, Wanshan Zhu, Jinxing Xie
Summary: In this study, we investigate a supply chain system consisting of a retailer and a supplier. We examine the threshold problem in contract design and take into account the risk preference of the retailer and the fairness concern of the supplier. The experiment shows that the behavior of the retailer affects the threshold of the optimal contract design, while the behavior of the supplier only affects the optimal wholesale price. These findings suggest that the behavior of retailers and suppliers play a crucial role in the mechanism design of supply chains.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Shuxia Peng, Bo Li, Wei Zheng
Summary: This study examines the impact of consumers' valuation updating on optimal pricing decisions and market structure in a competitive software market. The results show that with consumers' valuation updating, the incumbent can maximize profits through market segmentation, dominance, or entry deterrence strategies, and is willing to share the market with the entrant, achieving a win-win situation.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Victor Gimenez, Diego Prior, Claudio Thieme, Emili Tortosa-Ausina
Summary: This study proposes a nonparametric activity analysis methodology to assess the effectiveness of pandemic management in 61 countries nine months into the COVID-19 pandemic. The results show that effectiveness is strongly influenced by socioeconomic and cultural factors and reveal three main groups of countries based on their management level. This highlights the importance of operations research methods in accurately assessing pandemic management.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Narges Sereshti, Yossiri Adulyasak, Raf Jans
Summary: This paper investigates the stochastic multi-level lot sizing problem with a service level and explores the value of adding flexibility in such context. By modeling the problem as a two-stage stochastic program with uncertain demand and considering different demand scenarios, the study shows that adding flexibility to the system can result in cost savings, even with a small degree of flexibility.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Jafar Chaab, Georges Zaccour
Summary: This paper examines the pricing of a new product in the presence of sophisticated consumer behaviors. The study finds that forward-looking consumer behavior can either strengthen or weaken the effectiveness of a penetration pricing strategy, while the superiority of committed pricing in terms of firm's profit heavily depends on consumer behaviors.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Amelia Bilbao-Terol, Celia Bilbao-Terol
Summary: This paper presents a methodology that combines the hedonic pricing method and the Choquet integral for modelling the hotel selection process. This hybrid technique takes into account both market valuation and the importance of criteria, and holds potential benefits.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Management
Hui Li, Dongdong Wu
Summary: This study aims to investigate the impact of scale effects from restructuring on performance in tourism firms, and examine the influence of investor attention on restructuring performance. The findings reveal that restructuring activities can enhance scale effects, but the benefits decrease over time, and investor attention online also plays a role in determining restructuring performance.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)