Kurum Yazarı "Erginel, Nihal" Scopus İndeksli Yayınlar Koleksiyonu İçin Listeleme
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Adsorption of Disperse Orange 30 dye onto activated carbon derived from Holm Oak (Quercus Ilex) acorns: A 3(k) factorial design and analysis
Un, Umran Tezcan; Ateş, Funda; Erginel, Nihal; Özcan, Öznur; Oduncu, Emre (Academic Press LTD- Elsevier Science LTD, 2015)In this study, samples of activated carbon were prepared from Holm Oak acorns by chemical activation with H3PO4, ZnCl2 and KOH as activating agents. The samples were characterized by SEM, BET, FTIR and elemental analysis, ... -
Construction of a fuzzy QFD failure matrix using a fuzzy multiple-objective decision model
Erginel, Nihal (Taylor & Francis LTD, 2010)Global competition has forced companies to consider increasing quality and decreasing all costs, including quality costs. When constructing the quality plan for both the incoming raw materials and the manufacturing process, ... -
Continuous electrocoagulation of cheese whey wastewater: An application of Response Surface Methodology
Un, Umran Tezcan; Kandemir, Ayşe; Erginel, Nihal; Ocal, S. Eren (Academic Press LTD- Elsevier Science LTD, 2014)In this study, treatment of cheese whey wastewater was performed using a uniquely-designed continuous electrocoagulation reactor, not previously encountered in the literature. An iron horizontal rotating screw type anode ... -
Design of Fuzzy u Control Charts
When expressing any data in linguistic terms related to a quality characteristic, traditional statistical techniques are insufficient to capture the vagueness in the data. Linguistic data can be transformed into numerical ... -
Determining the Criteria and Evaluating Six Sigma Projects via Fuzzy ANP method in Group Decision
Altıntaş, Merve; Erginel, Nihal; Küçük, Gamze (Elsevier Science BV, 2016)Six Sigma is a well-structured methodology based to detect and reduce the variation on design and production process. Six sigma helps to achieve the company's goals by driving the six sigma projects throughout the company. ... -
Determining Weights in Multi-Objective Linear Programming under Fuzziness
Yalçın, Gülçin Dinç; Erginel, Nihal (Int Assoc Engineers-Iaeng, 2011)This study presents a method to determine weights of objectives in multi objective linear programming without decision maker/s preference. The method is developed by modifying Belenson and Kapur's approach under fuzziness. ... -
Development of fuzzy ((X) over bar) over tilde - (R) over tilde and ((X) over bar) over tilde - (S) over tilde control charts using alpha-cuts
Şentürk, Sevil; Erginel, Nihal (Elsevier Science Inc, 2009)Statistical process control (SPC) is an approach that uses statistical techniques to monitor the process. Shewhart introduced the control charts that are one of the most important techniques of quality control to detect ... -
Estimating Fuzzy Life Time with a Fuzzy Reliability Function in the Appliance Sector
Erginel, Nihal; Saraçoğlu, Hande; Yıldız, Gülay; Şentürk, Sevil (Springer International Publishing Ag, 2018)Reliability is defined as the length of time a component works without failing. The reliability function shows an estimate for the probable amount of time a component should work without experiencing failure. Fuzzy set ... -
Evaluating the packing process in food industry using fuzzy and [stilde] control charts
The fuzzy set theory addresses the development of concepts and techniques for dealing with uncertainty or impression conditions. If the collected data from a process include vagueness due to human subjectively or measurement ... -
Evaluation methods for completed Six Sigma projects through an interval type-2 fuzzy ANP
Erginel, Nihal; Uluskan, Meryem; Kücük, Gamze; Altıntaş, Merve (Ios Press, 2018)We propose project evaluation criteria by considering not only the Six Sigma approach, but also European Foundation for Quality Management (EFQM) model features, and introduce an evaluation model for completed Six Sigma ... -
Fuzzy Dea Approach to Solve the Location Selection of Wind Energy
Erginel, Nihal; Yalçınkaya, Merve; Şentürk, Sevil (World Scientific Publ Co Pte LTD, 2012)Wind energy is an important energy source among the renewable energies, in nowadays. Turkey has many wind energy locations due to the appropriate weather conditions. The problem of location selection of wind energy depends ... -
Fuzzy EWMA and Fuzzy CUSUM Control Charts
Erginel, Nihal; Şentürk, Sevil (Springer Int Publishing Ag, 2016)Exponentially Weighted Moving- Averages (EWMA) and Cumulative-Sum (CUSUM) control charts have the ability of detecting small shifts in the process mean. Classical EWMA and CUSUM charts are not capable to capture the ... -
Fuzzy exponentially weighted moving average control chart for univariate data with a real case application
Şentürk, Sevil; Erginel, Nihal; Kaya, İhsan; Kahraman, Cengiz (Elsevier Science BV, 2014)Statistical process control (SPC) is an approach to evaluate processes whether they are in statistical control or not. For this aim, control charts are generally used. Since sample data may include uncertainties coming ... -
Fuzzy individual and moving range control charts with ?-cuts
Erginel, Nihal (2008)In Statistical Process Control (SPC), both variable and attribute control charts are widely used techniques to monitor and evaluate the process with respect to the related quality characteristics. In variable control charts, ... -
Fuzzy multi-objective decision model for calibration supplier selection problem
Erginel, Nihal; Geçer, Ayşe (Pergamon-Elsevier Science LTD, 2016)Quality products and competitively priced services are crucial in today's global markets. To provide quality at an acceptable price, companies seek out not only raw material and product suppliers but also calibration ... -
Fuzzy multi-objective programming algorithm for vehicle routing problems with backhauls
Yalçın, Gülçin Dinç; Erginel, Nihal (Pergamon-Elsevier Science LTD, 2015)The vehicle routing problem with backhauls (VRPB) is an extension of the standard vehicle routing problem. VRPB has two sets of customers: linehaul customers and backhaul customers. The aim of this study is to propose a ... -
A Fuzzy multiple objective decision model to select the significant qualty characteristics of a product
Erginel, Nihal (2007)Prioritization the significant quality characteristics are considerable area in quality planning process. All quality characteristics of a product can not be measured/ tested incoming department or production line due to ... -
Fuzzy p˜ control chart
Erginel, Nihal (2008)Control charts are very useful tool for monitoring and analyzing the processes. When the quality characteristics cannot be represented in numerical form, like softness, appearance, chapped, damaged, etc., control charts ... -
Fuzzy rule-based (p)over-tilde and n(p)over-tilde control charts
Erginel, Nihal (Ios Press, 2014)In a process using monitoring with p-control charts or np-control charts, due to the uncertainty of the attribute data, traditional control charts may be insufficient. In this case, fuzzy control charts are pertinent control ... -
Fuzzy Statistical Process Control Techniques in Production Systems
Kahraman, Cengiz; Gülbay, Murat; Erginel, Nihal; Şentürk, Sevil (Springer-Verlag Berlin, 2010)Crisp Shewhart control charts monitor and evaluate a process as "in control" or "out of control" whereas the fuzzy control charts do it by using suitable linguistic or fuzzy numbers by offering flexibility for control ...