Yavuz A. Bozer

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We examine a multiple-vehicle routing problem that permits split pick-ups (mVRPSP). This problem involves a fleet of trucks having identical capacity, multiple suppliers, and a single assembly plant. The fleet is responsible for moving parts from the suppliers to the assembly plant. The problem is to determine, for each truck, how many parts to pick up at(More)
In an earlier paper, Bozer and Srinivasan introduced the tandem concept for automated guided vehicle (AGV) systems and presented an analytical model to evaluate the throughput performance of a basic component of the system; namely, a single vehicle serving a set of workstations under the First-Encountered-First-Served rule. In this study, using the above(More)
Trip-based material handling systems such as AGV systems or lift trucks are often designed with a given flow matrix (or from-to chart), which typically shows the number of loaded trips that the devices must perform per unit time between the workstations. A from-to chart that would result from the parts flow in a facility actually is dictated by the transfer(More)
To evaluate the behavior of circulating endothelin and atrial natriuretic peptide (ANP) during coronary artery bypass graft (CABG) surgery, blood samples from patients with coronary artery disease (n = 8) were investigated before, during and after operation. Plasma levels of endothelin and ANP were determined using the radioimmunoassay method. Baseline(More)
Data warehouse is a centralized repository for analyzing and storing huge amount of data. In distributed data warehouse, data can be shared across multiple data repositories which belong to one or more organizations. Query sorting is one of the issues for formatting the number of queries that can be selected together. Reducing the usual completion period of(More)
Familial and biatrial myxomas of the heart have rarely been described. We describe a familial atrial myxoma involving a parent with biatrial and a child with a left atrial myxoma. Atrial myxomas were diagnosed preoperatively by echocardiography and successfully removed at operation. Echocardiography can be used in the diagnosis of cardiac myxoma, detection(More)