University of Economics & Technology Repository
→
Akademik Arşiv / Institutional Repository
→
Mühendislik Fakültesi / Faculty of Engineering
→
Endüstri Mühendisliği Bölümü / Department of Industrial Engineering
→
Browsing Endüstri Mühendisliği Bölümü / Department of Industrial Engineering by Issue Date

Browsing Endüstri Mühendisliği Bölümü / Department of Industrial Engineering by Issue Date

Now showing items 1-20 of 63

On the Moments of a Semi-Markovian Random Walk with Gaussian Distribution of Summands

Aliyev, Rovshan; Khaniyev, Tahir (Taylor & Francis Inc, 2014-01)

In this article, a semi-Markovian random walk with delay and a discrete interference of chance (X(t)) is considered. It is assumed that the random variables (n), n=1, 2,..., which describe the discrete interference of ...
Some asymptotic results for the semi-Markovian random walk with a special barrier

Aliyev, Rovshan; Kesemen, Tulay; Khaniyev, Tahir (ISOSS Publ, 2014-07)

In this paper, a semi-Markovian random walk with a discrete interference of chance (X(t)) is considered. Under the assumption that the random variables {zeta(n)}, n >= 1 describing discrete interference of chance are in ...
A New Estimator for Stationary Distribution of the Inventory Model of Type (s, S)

Gokpinar, Esra; Khaniyev, Tahir; Gamgam, Hamza; Gokpinar, Fikri (Gazi Univ, 2015)

We consider inventory model of type (s, S) which is used mostly in stock control policy. It is very important to know characteristics of an inventory model of type (s, S), such as stationary distribution. Using the straight ...
A production scheduling model and analysis for the maintenance repair and overhaul service providers

Ertoğral, Kadir; Erkoc, Murat; Ulker, Dogukan Hazar (Gazi Univ, Fac Engineering Architecture, 2015)

Maintenance, repair and overhaul (MRO) are regulated and necessary activities for the airline sector to ensure the safety and continuity of flights. Both military and commercial aircrafts must go through MRO at regulated ...
Investigation of fuzzy inventory model of type (s, S) with Nakagami distributed demands

Turksen, I. Burhan; Khaniyev, Tahir; Gokpinar, Fikri (IOS Press, 2015)

In this study, a fuzzy inventory model of type (s, S) is considered under Nakagami distribution of demands. We first obtain the membership function of the fuzzy renewal function when the amount of demand has Nakagami ...
Weak convergence theorem for the ergodic distribution of a random walk with normal distributed interference of chance

Hanalioglu, Z.; Khaniyev, Tahir; Agakishiyev, I. (Turkic World Mathematical Soc, 2015)

In this study, a semi-Markovian random walk process (X (t)) with a discrete interference of chance is investigated. Here, it is assumed that the zeta(n), n = 1; 2; 3, ..., which describe the discrete interference of chance ...
Managing transshipments in a multi-retailer system with approximate policies

Comez-Dolgan, Nagihan; Fescioğlu Ünver, Nilgün (Palgrave Macmillan Ltd, 2015)

Using the right transshipment policy is important when transshipments are exercised under demand uncertainty. Optimal transshipment policy can be quite complex in a multi-firm system as optimal actions depend on all system ...
RFID in production and service systems: Technology, applications and issues

Fescioğlu Ünver, Nilgün; Choi, Sung Hee; Sheen, Dongmok; Kumara, Soundar (Springer, 2015)

Radio Frequency Identification (RFID) is a technology used for identification of objects and information transfer from a distance though radio waves. Different types of RFID tags are used for different applications. ...
Bid price optimization for truckload carriers in simultaneous transportation procurement auctions

Kuyzu, Gültekin; Akyol, Cagla Gul; Ergun, Ozlem; Savelsbergh, Martin (Pergamon-Elsevier Science Ltd, 2015-03)

We study simultaneous transportation procurement auctions from a truckload carrier's perspective. We formulate a stochastic bid price optimization model aimed at maximizing the carrier's expected profit. The model accounts ...
Asymptotic Properties of the Straight Line Estimator for a Renewal Function

Gokpinar, Esra; Khaniyev, Tahir; Gamgam, Hamza (Univ Kebangsaan Malaysia, 2015-07)

In estimation problems in renewal function, when the distribution is not known, nonparametric estimators of renewal function are used. Frees (1986a, Warranty analysis and renewal function estimation, Naval Res. Logist. ...
Cyclic Delivery Schedules for an Inventory Routing Problem

Ekici, Ali; Ozener, Okan Orsan; Kuyzu, Gültekin (Informs, 2015-11)

We consider an inventory routing problem where a common vendor is responsible for replenishing the inventories of several customers over a perpetual time horizon. The objective of the vendor is to minimize the total cost ...
Asymptotic approach for a renewal-reward process with a general interference of chance

Aliyev, Rovshan; Ardic, Ozlem; Khaniyev, Tahir (Taylor & Francis Inc, 2016)

In this study, a renewal-reward process with a discrete interference of chance is constructed and considered. Under weak conditions, the ergodicity of the process X(t) is proved and exact formulas for the ergodic distribution ...
Automated robotic assembly line design with unavailability periods and tool changes

Gültekin, Hakan; Tula, Adnan; Akturk, M. Selim (Inderscience Enterprises Ltd, 2016)

We focus on an assembly line design problem of a fully automated robotic spot-welding line. Different from existing studies, we take the prescheduled unavailability periods, such as lunch and tea breaks, into account in ...
Asymptotic Rate for Weak Convergence of the Distribution of Renewal-Reward Process with a Generalized Reflecting Barrier

Khaniyev, Tahir; Gever, Basak; Hanalioglu, Zulfiye (Springer-Verlag Berlin, 2016)

In this study, a renewal-reward process (X(t)) with a generalized reflecting barrier is constructed mathematically and under some weak conditions, the ergodicity of the process is proved. The explicit form of the ergodic ...
On The Application Of Random Walk With Delay And Pareto Distributed Interference Of Chance To An Insurance Model

Kesemen, Tulay; Kucuk, Zafer; Khaniyev, Tahir; Yetim, Fuat; Bektas Kamislik, Ash (Gazi Univ, 2016)

In this study, a semi-Markovian random walk with Pareto distributed interference of chance and delay is considered. Some exact formulas for the first four stationary moments of the process are obtained when the random ...
Weak convergence theorem for ergodic distribution of stochastic processes with discrete interference of chance and generalized reflecting barrier

Aliyev, R.; Khaniyev, Tahir; Gever, B. (Siam Publications, 2016)

In this paper, a stochastic process with discrete interference of chance and generalized reflecting barrier (X (t)) is constructed and the ergodicity of this process is proved. Using basic identity for random walk processes, ...
A mobile asset sharing policy for hospitals with real time locating systems

Demircan-Yildiz, Ece Arzu; Fescioğlu Ünver, Nilgün (IOS Press, 2016)

BACKGROUND: Each year, hospitals lose a considerable amount of time and money due to misplaced mobile assets. In addition the assets which remain in departments that frequently use them depreciate early, while other assets ...
Maximizing Wireless Sensor Network lifetime by communication/computation energy optimization of non-repudiation security service: Node level versus network level strategies

Yildiz, Huseyin Ugur; Bicakci, Kemal; Tavlı, Bülent; Gültekin, Hakan; Incebacak, Davut (Elsevier Science Bv, 2016-02)

In a typical Wireless Sensor Network (WSN) application, the basic communication service is the transportation of the data collected from sensors to the base station. For prolonging the network lifetime, energy efficiency ...
Scheduling in two-machine robotic cells with a self-buffered robot

Gundogdu, Emine; Gültekin, Hakan (Taylor & Francis Inc, 2016-02-01)

This study considers a production cell consisting of two machines and a material handling robot. The robot has a buffer space that moves with it. Identical parts are to be produced repetitively in this flowshop environment. ...
Overhaul planning and exchange scheduling for maintenance services with rotable inventory and limited processing capacity

Erkoc, Murat; Ertoğral, Kadir (Pergamon-Elsevier Science Ltd, 2016-08)

Maintenance, repair and overhauling (MRO) of high cost equipment used in many industries are typically subject to regulations set by local governments or international agencies. For example in the aviation industry, critical ...