Yeliz Buruk Şahin

Eskisehir Osmangazi University | ESOGU · Department of Industrial Engineering

The minimizations of voids and exceptional elements by considering the part-machine incidence matrix of the cell formation problem have been discussed in the literature. In recent years, a few mathematical models considering the assignment of workers to cells in addition to part and machine have been proposed to fully utilize manufacturing systems....

The aim of this study is to investigate the effects of nano-oil additives on the wear properties of AISI 4140 steel material. This paper also introduces an application of mixture design to the development of a new proportion formulation for nano-oil additives dispersed in engine oil (SAE10W) to enhance lubrication. A mixture design procedure was pe...

The Pb(II) and Ni(II) biosorption of a fungal biomass isolated from mine drainage of metal-processing industries in Balya (BalA +/- kesir province, Turkey) was optimized using a response surface methodology by altering parameters such as pH, initial metal concentration, contact time and biosorbent dosage. This strain was shown to be highly similar...

The main purpose of this study was to optimize the glaze formulation of a company that produces vitrified products. In this type of process, the chemical composition of the glaze has a critical effect on quality indicators such as coefficient of expansion, R value, and creeping value. The procedure used in this study included design, modeling, opti...

Wage management is an important task which affects a firm’s productivity in the short term and the consistency of the firm’s activities in long term. If an organization fails to establish a fair wage policy among the personnel, conflict is inevitable in the organization. A fair wage policy can be achieved by job evaluation, which is a technique use...

Home Health Care (HHC) services have emerged as a result of the need to provide care to patients/people who cannot be treated in hospital due to their special conditions and/or need home care. The care and treatment processes provided by this service have been appreciated by researchers as they can be less expensive and just as effective than care...

Although most previous studies on cell formation have involved the assignment of parts and machines to cells, in recent years the assignment of workers has also been considered and the studies have taken into account the human factor. An important step for the successful implementation of a Cellular Manufacturing System is to decide appropriate gro...

Biodegradation involving the use of biological systems are proving to be more cost-effective, energy efficient and environmentally friendly method for treatment with dye. There are also some advantages of enzymatic degradation to remove pollutants from textile effluents. They are specific and selectable for the substrates. Moreover, the usage of en...

This paper proposes a new linearized mathematical model to solve integrated cell formation and job scheduling problem. The model aims to minimize the exceptional elements, voids and the make-span of the jobs. The results of test problems show that the proposed model is very effective to obtain best solutions for small sized problems in reasonable c...

Course timetabling problem is one of the most common time scheduling problem that frequently encountered in universities and whole education institutions. To eliminate this problem requires notable amount of labour and supply and in several education institutions, this scheduling is done manually but it doesn’t occur as desired and causes to loss o...

Today, in many textile firms, high defect rates and inefficiency stand out due to the intensive labor in the production processes. For this reason, to be able to detect failure modes and effects, number of defects and defect rates fast and intervene in the process just in time is vital for textile firms. Accelerating feedback by producing accurate...

Artificial neural network is a machine learning algorithm that has been widely used in many application areas. The performance of the algorithm depends on the type of the problem, the size of the problem, and the architecture of the algorithm. One of the most important things that affect ANN's performance is the selection of hyper‐parameters, but t...

Sağlık sektöründe performans değerlendirmesi, kalitenin ölçümü ve iyileştirilmesi bakımından oldukça önemlidir. Performans ölçütleri değerlendirildiğinde, çok sayıda kriter ile değerlendirme yapılması gerekliliği bilinmektedir. Çok kriterli karar verme ortamında, problemlerin çözümü için literatürde çok sayıda çalışma mevcut olup, dönemsel olarak v...

The hydrolysis of sodium borohydride (NaBH4) is a promising reaction with a possible practical application as a means of generating hydrogen. The efficiency of hydrogen production can be enhanced significantly by use of a catalyst during the reaction. Cobalt borides show significant catalytic activity, but unsupported CoB particles aggregate easily...

Sustainability refers to the ability of organizational decisions not to adversely affect the future state of the natural environment, societies and business life. This concept mainly includes environmental, economic and social dimensions. In environmental sustainability, supply chain management aims to use resources such as water and energy in a wa...

Abstract Due to the constantly changing and evolving industrial environment shaped by new technologies, students who are about to join the labor force must meet the needs and expectations of the industry. This can be ensured by the students' self-improvement and the compatibility of their academic education with the new technologies. In this contex...

In a cellular manufacturing system, three important decisions are to form cells, design the layout of cells, and schedule of parts in the cells. Most of the studies in this area have discussed these decisions separately and independently. However, for general system performance, it is important to consider these decisions in relation to each other,...

Kalite Fonksiyon Yayılımı, müşteri taleplerine göre işletmenin mevcut veya yeni ürün/hizmet tasarımının en etkin biçimde gerçekleştirilmesini sağlayan bir yaklaşımdır. Yöneticiler, şirketlerinin sürdürülebilirliği için müşterilerin değişen taleplerini hızlı ve kaliteli bir şekilde karşılamak zorundadırlar. Yapılan çalışmada kullanımı nispeten yeni...

Parallel machine environments are widespread due to the fact that there are several machines that encounter the same job in the workshop environment. One of the most important issues that integrates the machine scheduling problem with the real life cases and enhances the applicability of model is the set-up times. They include work required to prep...

Having more than one machine that does the same job provides capacity increase and flexibility to businesses. On the other hand, managing the capacity at hand is a serious problem. Multiple machines capable of doing the same job are called as parallel machines. Scheduling of such machines is much more complicated than single machine scheduling. Whi...

The phenol degradation capacity of Serratia marcescens NSO9-1 isolated from olive mill wastewater was evaluated and optimized in this study. Plackett-Burman design coupled with Box-Behnken methodology was used to evaluate the effects of medium components and significant parameters on phenol degradation by this relevant strain. According to Plackett...

In this study, the alkaline protease-production capacity of a Geobacillus subterraneus C2-1 isolate from the Çitgöl thermal spring was investigated and optimised using a Plackett-Burman experimental design. In addition to the incubation time, which was the most important parameter, other significant factors were the peptone, glucose, and MgSO4.7H2O...

As an outstanding manufacturing technology, cellular manufacturing is known as a useful approach for improving efficiency in industrial processes. Implementation of this approach requires indispensably considering various issues such as cell formation, cell layout of machines within cells/cells within shop floor, part scheduling in cells and resour...

Objective: Biosurfactants are surface-active substances produced by microorganisms. The growth of microorganism supports biosurfactant production on hydrocarbon polluted environments. In this study, the capacity of biosurfactant production of Georgenia daeguensis (accession number, KP798810) isolated from hydrocarbon- contaminated soil was studied....

Havayolu seyahatlerinin planlanması, havayolu işlemlerinin gerçekleştirilmesi çoğu zaman zor, stresli ve korkutucu bir süreç olabilmekte, süreçten memnuniyetsiz ayrılan bir müşteri ise kayıp müşteriye dönüşebilmektedir. Bu çalışmada, havayolu seyahatlerini kolaylaştıracak, gelişen teknolojik imkanları da dikkate alan akıllı telefon ve tablet gibi c...

Design of experiments (DOE) is a systematic approach to applying statistical methods to the experimental process. The main purpose of this study is to provide useful insights into mixture design as a special type of DOE and to present a review of current mixture design applications in the food industry. The theoretical principles of mixture design...

There are many studies in the literature in which the minimization of voids and exceptional elements by considering part-machine incidence matrix have been discussed. In recent years, some mathematical models considering assignment of workers to cells in addition to part and machine have been proposed to fully utilize of the manufacturing systems....

Objective: The aim of this study was to investigate the laccase production of Trametes versicolor under submerged fermentation condition. Then, dye decolorization by laccase was optimized using Box-Behnken methodology. Methods: The optimal culture conditions for producing high amount of laccase were determined using Taguchi methodology. The experim...

The aim of this study was to offer an optimum formulation for a vitrified product via D-optimal mixture design method as a special kind of Response Surface Methodology. Mixture design experiments were used to study the effects of interactions among five raw materials constructing product formulation. Based on design expert software, statistical mod...

Amaç: Hidrokarbon kirliliği bulunan bir topraktan izole edilmiş ve biyosürfektan üretim yeteneği olduğu Drop-Collapse yöntemi ile belirlenmiş bir izolatın gereksinim duyduğu optimum besiyeri bileşiminin belirlenmesi çalışmanın amacını oluşturmaktadır. Yöntem ve Gereçler: Eskişehir’de hidrokarbon benzeri bileşiklerce kirlenmiş topraktan alınan bir d...

The Pb(II) and Ni(II) biosorption of a fungal biomass isolated from mine drainage of metal-processing industries in Balya (Balıkesir province, Turkey) was optimized using a response surface methodology by altering parameters such as pH, initial metal concentration, contact time and biosorbent dosage. This strain was shown to be highly similar to Pe...

Ambarda ürünlerin raflara atanması, ambar yönetiminin etkinliği açısından önemli konulardandır. Bu sebeple, stok alanlarına malzeme atanması konusunda pek çok çalısma yapılmıstır. Ele alınan çalısma kapsamında, bir otomotiv isletmesinde karsılasılan, stok alanlarına malzeme atama problemi incelenmistir. Söz konusu problemin çözümü için, Tompkins ta...