Now showing items 395-414 of 663

    • A new model for the hazardous waste location-routing problem 

      Alumur, S.; Kara, B. Y. (Elsevier, 2007)
      Hazardous waste management involves the collection, transportation, treatment and disposal of hazardous wastes. In this paper a new multiobjective location-routing model is proposed. Our model also includes some constraints, ...
    • New solution methods for single machine bicriteria scheduling problem: Minimization of average flowtime and number of tardy jobs 

      Erenay, F. S.; Sabuncuoglu, I.; Toptal, A.; Tiwari, M. K. (Elsevier, 2010)
      We consider the bicriteria scheduling problem of minimizing the number of tardy jobs and average flowtime on a single machine. This problem, which is known to be NP-hard, is important in practice, as the former criterion ...
    • Newsboy inventory problem 

      Gürler, Ülkü; Berk, Emre (John Wiley & Sons, 2006)
      A definition and classical formulation of the newsboy inventory model as a profit maximization problem is provided. The structure of the optimal stocking policy is given. Alternative formulations of mean-variance, down-side ...
    • Newsboy inventory problem [reprint] 

      Gürler, Ülkü; Berk, Emre (John Wiley & Sons, 2010)
      A definition and classical formulation of the newsboy inventory model as a profit maximization problem is provided. The structure of the optimal stocking policy is given. Alternative formulations of mean-variance, down-side ...
    • Newsvendor competition under asymmetric cost information 

      Güler, K.; Körpeoğlu, E.; Şen, A. (Elsevier B.V., 2018)
      We study the newsboy duopoly problem under asymmetric cost information. We extend the Lippman and McCardle (1997) of competitive newsboy to the case where the two firms are privately informed about their unit costs. The ...
    • Newton's method for linear inequality systems 

      Pınar, M. Ç. (Elsevier, 1998)
      We describe a modified Newton type algorithm for the solution of linear inequality systems in the sense of minimizing the ℓ2 norm of infeasibilities. Finite termination is proved, and numerical results are given. © 1998 ...
    • Non-cooperative joint replenishment under asymmetric information 

      Körpeoğlu, E.; Şen, A.; Güler, K. (Elsevier, 2013)
      We consider jointly replenishing n ex-ante identical firms that operate under an EOQ like setting using a non-cooperative game under asymmetric information. In this game, each firm, upon being privately informed about its ...
    • Non-identical parallel CNC machine scheduling 

      Türkcan, A.; Selim Aktürk, M.; Storer, R. H. (Taylor & Francis, 2003)
      In this study, we solve the non-identical parallel CNC machine scheduling problem. We have two objectives: minimizing the manufacturing cost (comprising machining, non-machining and tooling costs) and minimizing the total ...
    • Non-linear pricing by convex duality 

      Pınar, M. Ç. (Elsevier, 2015)
      We consider the pricing problem of a risk-neutral monopolist who produces (at a cost) and offers an infinitely divisible good to a single potential buyer that can be of a finite number of (single dimensional) types. The ...
    • Nonparametric estimation of hazard functions and their derivatives under truncation model 

      Gürler, Ü.; Wang, J. -L. (Kluwer Academic Publishers, 1993)
      Nonparametric kernel estimators for hazard functions and their derivatives are considered under the random left truncation model. The estimator is of the form of sum of identically distributed but dependent random variables. ...
    • A note on "continuous review perishable inventory systems: models and heuristics" 

      Gürler, Ü.; Özkaya, B. Y. (2003)
      In a recent paper, Lian and Liu (2001) consider a continuous review perishable inventory model with renewal arrivals, batch demands and zero lead times. However, the main analytical result they provide holds only for some ...
    • A note on a polynomial time solvable case of the quadratic assignment problem 

      Erdoǧan, G.; Tansel, B. (Elsevier, 2006)
      We identify a class of instances of the Koopmans-Beckmann form of the Quadratic Assignment Problem that are solvable in polynomial time. This class is characterized by a path structure in the flow data and a grid structure ...
    • A note on robust 0-1 optimization with uncertain cost coefficients 

      Pınar, M. Ç. (Springer, 2004)
      Based on the recent approach of Bertsimas and Sim (2004, 2003) to robust optimization in the presence of data uncertainty, we prove an easily computable and simple bound on the probability that the robust solution gives ...
    • Note on the backroom effect in retail operations 

      Atan, Z.; Erkip, N. (Wiley-Blackwell, 2015)
      Eroglu et al. (2013) study a retailer with limited shelf capacity and a backroom. They study a continuous review (r, q) ordering policy with a known order quantity, q. Assuming that backorders can be satisfied from the ...
    • A note on the within-cell layout problem based on operation sequences 

      Aktürk, M. S. (Taylor & Francis, 1996)
      The existing studies in the literature usually ignore the within-cell layout problem while forming part families and manufacturing cells. A new approach is proposed to solve the part-family and machine-cell formation problem ...
    • A novel optimization algorithm for video placement and routing 

      Bektaş, T.; Oǧuz, O.; Ouveysi, I. (Institute of Electrical and Electronics Engineers, 2006)
      In this paper, we propose a novel optimization algorithm for the solution of the video placement and routing problem based on Lagrangean relaxation and decomposition. The main contribution can be stated as the use of integer ...
    • A novel technique for a linear system of equations applied to channel equalization 

      Pilancı, Mert; Arıkan, Orhan; Oǧuz, B.; Pınar, Mustafa Ç. (IEEE, 2009)
      In many inverse problems of signal processing the problem reduces to a linear system of equations. Accurate and robust estimation of the solution with errors in both measurement vector and coefficient matrix is a challenging ...
    • On closed-form solutions of a resource allocation problem in parallel funding of R & D projects 

      Gürler, Ü.; Pınar, M. Ç.; Jelassi, M. M. (Elsevier, 2000)
      In order to reduce the risk of complete failure, research managers often adopt a parallel strategy by simultaneously funding several R&D activities and several research teams within each activity. The parallel strategy ...
    • On connected Boolean functions 

      Ekin, Oya; Hammer, P. L.; Kogan, A. (Elsevier, 1999)
      A Boolean function is called (co-)connected if the subgraph of the Boolean hypercube induced by its (false) true points is connected; it is called strongly connected if it is both connected and co-connected. The concept ...
    • On envy-free perfect matching 

      Arbib, C.; Karaşan, Oya Ekin; Pınar, Mustafa (Elsevier, 2018)
      Consider a situation in which individuals –the buyers –have different valuations for the products of a given set. An envy-free assignment of product items to buyers requires that the items obtained by every buyer be ...