Month: October 2017

Evaluation of E-Learning Web Sites Using Fuzzy Axiomatic Design Based Approach

by adminUncategorized

High quality web site has been generally recognized as a critical enabler to conduct online business. Numerous studies exist in the literature to measure the business performance in relation to web site quality. In this paper, an axiomatic design based approach for fuzzy group decision making is adopted to evaluate the quality of e-learning web sites. Another multi-criteria decision making technique, namely fuzzy TOPSIS, is applied in order to validate the outcome. The methodology proposed in this paper has the advantage of incorporating requirements and enabling reductions in the problem size, as compared to fuzzy TOPSIS. A case study focusing on Turkish e-learning websites is presented, and based on the empirical findings, managerial implications and recommendations for future research are offered.

Büyüközkan, G. and Arsenyan, J. and Ertek, G. (2010).“Evaluation of e-learning web sites using fuzzy axiomatic design based approach.” International Journal of Computational Intelligence Systems, 3 (1). pp. 28-42.

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.
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Evaluation of E-Learning Web Sites Using Fuzzy Axiomatic Design Based Approach

Dr. Gürdal Ertek recommends the following related books:


Models, Methods, Concepts & Applications of the Analytic Hierarchy Process (International Series in Operations Research & Management Science) Softcover reprint of the original 1st ed. 2001 Edition


The Hierarchon: A Dictionary of Hierarchies (Analytic Hierarchy Process, Vol 5)

 

 

 

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Design requirements for a tendon rehabilitation robot: results from a survey of engineers and health professionals

by adminUncategorized

Exoskeleton type finger rehabilitation robots are helpful in assisting the treatment of tendon injuries. A survey has been carried out with engineers and health professionals to further develop an existing finger exoskeleton prototype. The goal of the study is to better understand the relative importance of several design criteria through the analysis of survey results and to improve the finger exoskeleton accordingly. The survey questions with strong correlations are identifited and the preferences of the two respondent groups are statistically compared. The results of the statistical analysis are interpreted and insights obtained are used to guide the design process. The answers to the qualitative questions are also discussed together with their design implications. Finally, Quality Function Deployment (QFD) has been employed for visualizing these functional requirements in relation to the customer requirements.

Patoğlu, V., Ertek, G., Öz, O., Zoroğlu, D., and Kremer, G. (2010) “Design requirements for a tendon rehabilitation robot: results from a survey of engineers and health professionals.” In: ASME 2010 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE 2010), Montreal, Quebec, Canada

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

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Design Requirements For A Tendon Rehabilitation Robot: Results From A Survey Of Engineers And Health Professionals

Dr. Gürdal Ertek recommends the following related books:

Engineering Design 5th Edition

 


Engineering Design: A Practical Guide

 

 

 

 

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Çapraz sevkiyat için temel bilgiler

by adminUncategorized

Çapraz sevkiyatta, kamyonlarla gelen malzemeler çıkış kapısına yönlendirilerek bekletilmeden doğrudan doğruya ya da kısa bir süreliğine bekletilerek sevkiyatı gerçekleştirecek kamyonlara yüklenir. Çapraz sevkiyat, lojistik süreçlerinde tasarruf elde etmek ve rekabetçi avantaj kazanmak için uygulanabilecek önemli bir tedarik zinciri stratejisidir. Örneğin, dünyanın en büyük perakendecisi olan Wal-Mart’ın lojistik başarısının temelinde çapraz sevkiyat ve bu stratejiyi gerçekleştirebilmek ve sürdürebilmek için kurulan sistem yatmaktadır. Bu makalede çapraz sevkiyat konusunda giriş seviyesinde bir bilgilendirme yapılacaktır: Çapraz sevkiyatın çeşitleri, ön koşulları, uygulandığı sektörler, getirdiği avantajlar ve dezavantajlar, ve perakende sektöründeki tipik bir çapraz sevkiyat süreci bu makalenin içeriğini oluşturmaktadır.

Ertek, G. (2010) “Çapraz sevkiyat için temel bilgiler” Lojistik, Sayı: 13.

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

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Çapraz Sevkiyat İçin Temel Bilgiler

Dr. Gurdal Ertek’in onerdigi kitaplar:

World-Class Warehousing and Material Handling, Second Edition

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Kimya Sanayinde Su Tasarrufu İçin Karar Destek Sistemi

by adminUncategorized

Bu bildiride, Türkiye’nin sanayileşmiş bölgelerinden Gebze’de bulunan bir temizlik kimyasalları fabrikası için geliştirdiğimiz ve 7 ay boyunca kullanılarak test edilen bir Karar Destek Sistemi (KDS) tanıtılacak ve yapılan çalışma özetlenecektir. Üretim planlamadan sorumlu fabrika çalışanları bu yeni sistemi uygulamaya aldıktan sonra firma haftada 1 tona yaklaşan su tasarrufu sağlamıştır. Su tasarrufunun yanısıra maliyet, enerji ve işgücü kazançları da gözlemlenmiştir. Temizlik kimyasallarının üretiminin planlamasında faydası ve kullanılabilirliği kanıtlanan bu sistem, ürünlerarası geçişin ürün karakteristiklerine göre yıkama gerektirdiği boya, tekstil, gıda ve diğer kimya sanayilerinde de kullanılabilme potansiyeline sahiptir.

Ertek, G., Akçay, A.E. (2010) “Kimya Sanayinde Su Tasarrufu İçin Karar Destek Sistemi.” İ.T.Ü. 12. Endüstriyel Kirlenme Kontrolü Sempozyumu, 16-18 Haziran 2010, Istanbul, Türkiye

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

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Kimya Sanayinde Su Tasarrufu İçin Karar Destek Sistemi

Dr. Gurdal Ertek’in onerdigi kitaplar:

Artificial Intelligence: A Modern Approach (3rd Edition) 3rd Edition

Network Flows: Theory, Algorithms, and Applications 1st Edition

 

 

 

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Innovation in product form and function: customer perception of their value

by adminUncategorized

The goal of product design is to obtain the maximum effect with minimum cost in functionality and aesthetic beauty. Consumers are attracted to the designs that reflect their use behaviors and psychological responses more than they are to the simple visual representations. When product functions and qualities are similar across products, customers make their purchasing decision upon aesthetic form. Form presents a significant competitive factor that improves the value of a product. Overall, the purpose of this study is to examine the most important product design factors that affect the market share trends of mobile phone companies. Study uses product characteristics for 1,028 mobile phones released between 2003 and 2008 as a case study. The multiple linear regression analysis is used to select highly correlated variables that influence the market share, and Mallow’s Cp method is used to determine the best-fitting model. The Partial Regression Coefficients are used to evaluate the relative importance of design criteria. The nine mobile phone design features that affect the market share were identified, and the block form style is determined as the most important design factor. Using these approaches, this study demonstrates how investments should be directed in the next mobile phone design process.

Kim, T., Okudan, G. and Ertek, G. (2009) “Innovation in product form and function: customer perception of their value.” In: ASME 2009 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE 2009), San Diego, CA, USA

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

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Innovation In Product Form And Function: Customer Perception Of Their Value

Dr. Gürdal Ertek recommends the following related books:


Engineering Design 5th Edition

 

 

 

 

 

 

 

 

 

 

 


Engineering Design: A Practical Guide

 

 

 

 

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Visual Data Mining for Developing Competitive Strategies in Higher Education

by adminUncategorized

Information visualization is the growing field of computer science that aims at visually mining data for knowledge discovery. In this paper, a data mining framework and a novel information visualization scheme is developed and applied to the domain of higher education. The presented framework consists of three main types of visual data analysis: Discovering general insights, carrying out competitive bench marking, and planning for High School Relationship Management (HSRM). In this paper the framework and the square tiles visualization scheme are described and an application at a private university in Turkey with the goal of attracting brightest students is demonstrated.

Ertek, G. (2009). “Visual Data Mining for Developing Competitive Strategies in Higher Education,” in Data Mining for Business Applications. Editors: Longbing Cao, Philip S. Yu, Chengqi Zhang and Huaifeng Zhang. Springer.

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

IMPORTANT: Even though this draft erroneously shows the header “Chapter 1”, the final version appeared as “Chapter 18 – Visual Data Mining for Developing Competitive Strategies in Higher Education” in the book “Data Mining for Business Applications” edited by Longbing Cao, Philip S. Yu, Chengqi Zhang and Huaifeng Zhang, and published by Springer in 2009.

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Developing Competitive Strategies in Higher Education through Visual Data Mining

Dr. Gürdal Ertek recommends the following related books:


Data Mining for Business Applications 2009th Edition


The Craft of Information Visualization: Readings and Reflections (Interactive Technologies) 1st Edition

 

 

 

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An Open Source Java Code For Visualizing Supply Chain Problems

by adminUncategorized

In this paper, we describe an open source Java class library for visualizing supply chain problems within a geographical context. The highly competitive markets and recent technological advances make the use of such supply chain network visualizations critical in both strategic and tactical levels. The most important characteristic of our work is its easy integration with any Java application. Our software differs from any other commercial and open source supply chain visualization tool by its simple structure, easy adoption and implementation and high compatibility. The main motivation of our study was to develop a simple – yet effective – library that would not require to learn and apply complicated visualization tools and data structures such as Geographical Information Systems (GIS). In this study, we illustrate the use of our visualization tool through maps of Turkey, Europe, North and South America, the United States and the NAFTA. We believe that ease of visualization offered by our open source tool will contribute to a multitude of projects in supply chain design, as well as increasing productive communication among practitioners, especially involved in strategic level decision making processes. We foresee that our supply chain visualization tool will fill a gap in this area with its simple but effective structure.

Yamaner, Y., Yamaner, Y., Akçay, A. E., Ertek, G. (2008) “An open source Java code for visualizing supply chain problems” . CELS 2008, Jönköping, Sweeden. (presented by Yekta Yamaner, Yalçın Yamaner and Alp Eren Akçay).

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

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An Open Source Java Code For Visualizing Supply Chain Problems

Dr. Gürdal Ertek recommends the following related books:


An Introduction to Geographical Information Systems (4th Edition)

 

 

 

 

 

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The bullwhip effect in supply chain: Reflections after a decade

by adminUncategorized

A decade has passed since the publication of the two seminal papers by Lee, Padmanabhan and Whang (1997) that describes the “bullwhip effect” in supply chains and characterizes its underlying causes. The bullwhip phenomenon is observed in supply chains where the decisions at the subsequent stages of the supply chain are made greedily based on local information, rather than through coordination based on global information on the state of the whole chain. The first consequence of this information distortion is higher variance in purchasing quantities compared to sales quantities at a particular supply chain stage. The second consequence is increasingly higher variance in order quantities and inventory levels in the upstream stages compared to their downstream stages (buyers). In this paper, we survey a decade of literature on the bullwhip effect and present the key insights reported by researchers and practitioners. We also present our reflections and share our vision of possible future.

Ertek, G., Eryılmaz, E. (2008) “The bullwhip effect in supply chain: Reflections after a decade” . CELS 2008, Jönköping, Sweeden. (presented by EmreEryılmaz).

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

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The Bullwhip Effect In Supply Chain Reflections After A Decade

Dr. Gürdal Ertek recommends the following related books:


Designing and Managing the Supply Chain 3e with Student CD 3rd Edition


Supply Chain Management (5th Edition)

Handbook of Experimental Economics

 

 

 

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A taxonomy of logistics innovations

by adminUncategorized

In this paper we present a taxonomy of supply chain and logistics innovations, which is based on an extensive literature survey. Our primary goal is to provide guidelines for choosing the most appropriate innovations for a company, such that the company can outrun its competitors. We investigate the factors, both internal and external to the company, that determine the applicability and effectiveness of the listed innovations. We support our suggestions with real world cases reported in literature.

Başar, A., Özşamlı, N., Akçay, A. E., Ertek, G. (2008) “A taxonomy of logistics innovations.” CELS 2008, Jönköping, Sweeden. (presented by Ayfer Başar and Nihan Özşamlı)

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

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A Taxonomy Of Logistics Innovations

Dr. Gürdal Ertek recommends the following related books:


Supply Chain Management (5th Edition)


World-Class Warehousing and Material Handling 1st Edition

 

 

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Benchmarking the Turkish Apparel Retail Industry Through Data Envelopment Analysis (DEA) and Data Visualization

by adminUncategorized

This paper presents a bench marking study of the Turkish apparel retailing industry. We have applied the Data Envelopment Analysis (DEA) methodology to determine the efficiencies of the companies in the industry. In the DEA model the number of stores, number of corners, total sales area and number of employees were included as inputs and annual sales revenue was included as the output. The efficiency scores obtained through DEA were visualized for gaining insights about the industry and revealing guidelines that can aid in strategic decision making.

Ertek, G., Can, M. A., and Ulus, F. (2007). “Bench marking the Turkish apparel retail industry through data envelopment analysis (DEA) and data visualization.” EUROMA 2007, Ankara, Turkey.

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

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Benchmarking The Turkish Apparel retail Industry Through Data envelopment Analysis (dea) And data Visualization

Dr. Gürdal Ertek recommends the following related books:


Information Visualization: Design for Interaction (2nd Edition)


Introduction to Data Envelopment Analysis and Its Uses: With DEA-Solver Software and References 2006th Edition

 

 

 

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