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Article
Publication date: 16 November 2018

Mine Sertsöz, Mehmet Fidan and Mehmet Kurban

Improvements on the energy efficiency of the induction motors bear on not only these motors but also on the whole industry as a result of preference of these types of motors. In…

Abstract

Purpose

Improvements on the energy efficiency of the induction motors bear on not only these motors but also on the whole industry as a result of preference of these types of motors. In recent projects, energy efficiency of the induction motors is approaching to 90 per cent. The first necessary condition of the efficiency improvements is an accurate estimation of energy efficiency. This study aims to estimate the energy efficiency of induction motors by using three innovative estimation methods.

Design/methodology/approach

Data for 307 motors were taken from three different companies and their torque, power, power factor and speed data were used. Three hybrid models were created by estimating the error of three autoregressive (AR)-based efficiency estimation models with the back-propagation artificial neural network (ANN) structure. In these proposed hybrid models, the AR models were supported with artificial neural networks to obtain a minimum estimation error. These three hybrid models were called as AR1-ANN, AR4-ANN and residual-ANN.

Findings

Without hybridization of AR models by back-propagation ANNs, the best estimation result was obtained by residual model. On the other hand, for the proposed hybrid models, the best estimation was obtained by AR1-ANN, followed by AR4-ANN and finally the residual-ANN according to ME values.

Practical implications

Proposed AR-ANN hybrid models relieve of longtime experiments for the energy efficiency measurement of induction motors. Furthermore, these AR-ANN models give more accurate results than the available methods in the literature. Engineering value of this research is three different issues in finding energy efficiency. The first one is minimizing of the test cost, the second one is no requirement the test equipment and the third one is not interrupting the motor. Every company that needs motors can use these estimation methods due to the advantages.

Originality/value

Novel three AR-ANN hybrid models for energy efficiency estimation were studied. These novel methods give better response than the other methods which were used for estimation of induction motors in the literature.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 38 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

Expert briefing
Publication date: 21 June 2023

The much anticipated appointments of new ministers of finance, foreign affairs and interior -- replacing incumbents that in various ways no longer serve the president's interests…

Content available
Book part
Publication date: 15 July 2021

Abstract

Details

A New Social Street Economy: An Effect of The COVID-19 Pandemic
Type: Book
ISBN: 978-1-80117-124-3

Book part
Publication date: 16 June 2021

Hiroko Kawamorita, Yashar Salamzadeh, Ali Kahramanoğlu, Kürşat Demiryürek, Nur İlkay Abacı and Noriyuki Takahashi

This chapter addresses the impact of gendered social capital in developing countries to understand the barriers and opportunities to women's entrepreneurship with social capital…

Abstract

This chapter addresses the impact of gendered social capital in developing countries to understand the barriers and opportunities to women's entrepreneurship with social capital development and also to examine factors influencing the development of social capital for women and how the identified factors benefit the creation of their entrepreneurial activities. This study follows a systemic literature review to achieve the purpose of the research by examining the selected articles in both English and Turkish, followed by factor comparison between developing, developed countries, and world datasets obtained from Global Entrepreneurship Monitor (GEM) database. The finding shows that social capital strongly impacts the entrepreneurial activities among women entrepreneurs in developing countries, especially in Turkey. Although the academic and practical studies on this field were started about two decades ago in Turkey, it has faced a radical increase in last 5 years and many practitioners and scholars working on these concepts. The clusters in English and Turkish resources are almost the same; however, the density and number of key terms are much lower in Turkish literature which shows a gap for Turkish researchers to publish more in this field to examine variables for better view about women entrepreneurship and social capital related to it.

Details

The Emerald Handbook of Women and Entrepreneurship in Developing Economies
Type: Book
ISBN: 978-1-80071-327-7

Keywords

Article
Publication date: 1 June 2017

Özlem Atalan and Hasan Şahan Arel

Commercial areas and bedestens (covered bazaars) are important public areas in Turkish cities and towns. These areas and buildings are essential in that they contribute vital…

Abstract

Commercial areas and bedestens (covered bazaars) are important public areas in Turkish cities and towns. These areas and buildings are essential in that they contribute vital economic and social characteristics to Turkish cities and towns. In the Ottoman period, these commercial areas, alongside inns, baths, mosques, and stores, were engaged in trading and manufacturing and formed a central part of life for the residents. The number of bedestens in a given city was dependent on the size of the city or town. All social, administrative, and economic activities were organized within these bedestens. Commercial structures, in which the bedestens are located, with different functions, such as arasta, inns, markets, covered markets, and stores, are the main components of the commercial districts. These structures were built by the order of the Sultan for the purpose of reviving and providing direction to the economic life of the city or town. One of the key components of these commercial structures was the bedestens. In terms of Turkish culture, a bedesten can be defined as the heart of the commercial district. Although these structures were built to sell textiles, they later functioned as places where antiques and/or valuable goods were also sold. Bedestens were usually a unique type of structure, with masonry masses between wooden stores located in the middle of the trade center of the city or town. The top of the bedesten, which was usually built as one storey and rectangular in shape, had a domed roof covered with lead. In this study, spatial analyses of these important architectural elements were conducted in terms of city planning, folk culture and commercial life. The bedestens selected for the study were those in historical cities located at major commercial road axes from the Ottoman period. The bedestens in these historical cities were examined, within the context of their planning, and assessments were made. The relations that these structures have with each other in general, and their common and different features, were also investigated.

Details

Open House International, vol. 42 no. 2
Type: Research Article
ISSN: 0168-2601

Keywords

Article
Publication date: 21 December 2021

Leyla Ozgen, Mehmet Güllü and Elif Esra Ozturk

The aim of this study is to develop a knowledge scale for nutrients of tropical and traditional fruits for university students and conduct its validity and reliability. Another…

Abstract

Purpose

The aim of this study is to develop a knowledge scale for nutrients of tropical and traditional fruits for university students and conduct its validity and reliability. Another purpose of the study is to determine whether or not the students' knowledge mean scores about nutrients of tropical and traditional fruits vary based on their demographic information.

Design/methodology/approach

The design of the study was the survey model. While the population consisted of 1,551 students studying in the faculty of health sciences, Gazi University, the sample consisted of 668 students who were determined based on criterion sampling.

Findings

When examining in terms of gender of the students, it was determined that even though mean score of the knowledge scale for nutritional values of tropical and traditional fruits was slightly higher in female students (X¯ = 8.12) than male students (X¯ = 7.71), there was an insignificant difference between them (t(666) = 1.25, p > 0.05). A significant difference was determined between the students' knowledge mean scores of the knowledge scale for nutritional values of tropical and traditional fruits in terms of residence place (t(666) = 2.86, p < 0.5). While the nutritional value mean score of the students residing in Ankara was low (X¯ = 7.67), the nutritional value mean score of the students residing out of Ankara was high (X¯ = 8.58).

Originality/value

When the scale developed in this study is analysed according to demographic information, it can be asserted that the students had knowledge about the nutrients of tropical and traditional fruits. Although tropical fruits are expensive, they still prefer these fruits. It can be stated that the students had knowledge about the diversity, nutritional compounds and antioxidant content of tropical and traditional fruits.

Details

British Food Journal, vol. 124 no. 11
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 27 February 2024

Hasan Evrim Arici, Mehmet Ali Köseoglu, Cagdas Aydin, Ceren Aydin and Levent Altinay

This study aims to identify the role of innovation research in formulating the intellectual structure of the hospitality and tourism literature by performing a bibliometric…

Abstract

Purpose

This study aims to identify the role of innovation research in formulating the intellectual structure of the hospitality and tourism literature by performing a bibliometric analysis.

Design/methodology/approach

In total, 6,255 journal articles on innovation were gathered from Scopus and analyzed using co-citation, bibliographic coupling and thematic content analyses. The most influential articles were also carefully read to reveal a nomological network of innovation research in hospitality and tourism scholarship.

Findings

Co-citation analysis reveals that there are six significant clusters in the field of innovation research. Various philosophical underpinnings might be used in different circumstances, with actor-network and Schumpeterian theory playing significant roles. A review of current works using bibliographic coupling reveals five interesting emerging research areas and makes numerous recommendations for when to conduct more studies. A review of influential articles displayed differences between the co-citation and bibliographic coupling analysis findings and produced a framework for further investigation of the knowledge field.

Originality/value

This paper is among the first integrative reviews on innovation research in hospitality and tourism by quantitatively reviewing published articles and qualitatively reviewing the content of the most influential studies.

Details

Journal of Hospitality and Tourism Technology, vol. 15 no. 2
Type: Research Article
ISSN: 1757-9880

Keywords

Article
Publication date: 8 February 2021

Buerhan Saiti, Adama Dembele and Mehmet Bulut

The problem of poverty in the Muslim world has been posing multi-faceted challenges to the life of individuals and the relations of people. Although this problem has been gaining…

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Abstract

Purpose

The problem of poverty in the Muslim world has been posing multi-faceted challenges to the life of individuals and the relations of people. Although this problem has been gaining scholarly attention and raised in relation to various issues ranging from social injustice, rampant corruption, societal instability, wide social polarization and insurgent movements that affect the regional peace and stability at large, neither effective economic mechanism proposed nor implemented to address the problem effectively. In this regard, it is also important to appreciate the recent initiations in the field of Islamic economics to present an optional view to the existing and alien economic models in the Muslim world. Therefore, the purpose of this study is to fill up this research gap by proposing a model of mobilizing funds through the global cash-waqf institution.

Design/methodology/approach

The study adopts content analysis to construct this global cash waqf model for poverty alleviation in Muslim countries.

Findings

The “global cash-waqf model” was proposed as an alternative that could be implemented and used to overcome the poverty matter in Muslim countries. It is assumed that the model will facilitate the fund mobilization among Muslim countries, which in return is going to assure full distribution and redistribution of wealth to eradicate the poverty in the Muslim world. The model was structured with a global vision in both the collection side and the distribution side.

Originality/value

The model will facilitate the fund’s mobilization among Muslim countries, which in return achieves an Islamic goal of distribution and redistribution of wealth to assure the well-being of all humanities in the society.

Details

Qualitative Research in Financial Markets, vol. 13 no. 3
Type: Research Article
ISSN: 1755-4179

Keywords

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