Ali Haydar Ozer

• PhD in Computer Engineering
• Faculty Member at Marmara University

Resale markets in which secondhand new and used goods are traded play an important role in circular economy with significant economic and environmental benefits. This study proposes a preference-based posted price electronic market model for resale markets which features several mechanisms to improve the market outcome. The proposed model allows ma...

Resource allocation is an important problem for cloud environments. This paper introduces an energy-aware combinatorial auction-based model for the resource allocation problem in clouds. The proposed model allows users of a cloud to submit their virtual resource requests as bids using the provided bidding language which allows complementarities and...

Bu çalışmada, yeni veya ikinci el kitap ticaretinin yapıldığı ikincil kitap pazarları için bir elektronik pazar modeli önerilmektedir. Bu modelde katılımcılar kitap alış ve satış isteklerini eşzamanlı olarak elektronik pazar sistemine iletebilirler. Satışa çıkarılan her kitap tekil bir ürün olarak kabul edilir ve fiyatı satıcısı tarafından belirlen...

Trading of used goods in secondhand markets is considered to have both environmental and economic benefits. For the trading of used goods as well as new ones, this study proposes a periodic double auction model for Internet-based electronic markets whereby each bidder can place both asks and bids for selling and purchasing goods respectively during...

We propose three auction and barter based electronic market models. Our first model is a direct barter model for the course add/drop process in the universities. We model the course add/drop process as a direct barter problem in which add/drop requests can be placed as barter bids. We also introduce a two-level weighting system that enables student...

Even though course timetabling and student scheduling problems have been studied extensively, not much has been done for the optimization of student add/drop requests after the initial registration period. Add/drop registrations are usually processed with a first come first served policy. This, however, can introduce inefficiencies and dead-locks r...

Differential auction–barter (DAB) model augments the well-known double auction (DA) model with barter bids so that besides the usual purchase and sale activities, bidders can also carry out direct bartering of items. The DAB model also provides a mechanism for making or receiving a differential money payment as part of the direct bartering of items...

Resource co-allocation problem is one of the challenging problems in grid and cloud environments. In this paper, we propose an auction based mathematical model for providing economically efficient allocations of resources in these environments. Our model improves our earlier multi-unit nondiscriminatory combinatorial auction model by introducing a...

Single unit combinatorial auction problem (CAP) and its multi-unit extension have received a lot of attention recently. This paper introduces yet another variant of CAP which generalizes the multi-unit CAP further to allow bids on collections of items that can come from bidder defined classes of items. A bidder may be indifferent to some items with...

Resource co-allocation problem is one of the challenging problems in grids. In order to model this problem, a new combinatorial auction based resource co-allocation (CABRC) approach is proposed. This economy based model provides efficient allocation of resources in a grid environment by allowing bidders to submit bids on the combinations of differe...

The main goal of this project is to develop a parallel tetrahedral mesh generator based on existing sequential mesh generation software. As sequential mesh generation software, the Netgen mesh generator was used due to its availability as LGPL open source software and its wide user base. Parallel mesh generation routines were developed using the MP...