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Article
Publication date: 6 November 2017

Mohd Muqeem, Ahmad Faizan Sherwani, Mukhtar Ahmad and Zahid Akhtar Khan

Diesel engine can produce power more efficiently with lower exhaust emissions when operated at optimum input parameter settings. To achieve this goal, the purpose of this paper is…

Abstract

Purpose

Diesel engine can produce power more efficiently with lower exhaust emissions when operated at optimum input parameter settings. To achieve this goal, the purpose of this paper is to optimize the input parameters of diesel engine which will lead to optimum performance and exhaust emissions.

Design/methodology/approach

To achieve the goal of improving diesel engine performance and exhaust emissions, four input parameters were considered in the study. Five different levels of each input parameter were taken. Four response variables under no load, half load and full load conditions were recorded. Experiments were performed in random manner according to selected Taguchi L25 orthogonal array. The data were analyzed using grey relational analysis coupled with principal component analysis. Analysis of S/N ratio was performed to obtain the optimum combination of input parameters. The grey relational grade at optimum setting of the input parameters was obtained by regression analysis.

Findings

Results of the current research work give the optimum input parameter settings for no load, half load and full load conditions of diesel engine. Engine produces power more efficiently with low exhaust emissions when operated at these optimum settings.

Practical implications

In view of the compliance to the stringent air pollution norms of the nations and fast depleting fossil fuels, it is of the utmost importance to design and operate the engine in the optimum range of its input parameters so that it produces more power with low exhaust emissions. This paper aims at optimizing input parameters of diesel engine to improve performance and exhaust emissions. Results of the study presented in this paper are significantly useful for diesel engine-related researchers and professionals.

Originality/value

From the literature review, it appears that only few researchers have conducted studies pertaining to the optimization of the input parameters of diesel engine to improve performance or exhaust emissions. Although few studies related to the optimization of compression ratio, fuel injection timing, fuel injection pressure and air pressure have been reported, no work related to optimization of temperature and pressure of turbocharged air has been reported. Therefore, the main focus of the current research work is on optimizing the charge air temperature and pressure with respect to performance and exhaust emissions.

Details

Grey Systems: Theory and Application, vol. 7 no. 3
Type: Research Article
ISSN: 2043-9377

Keywords

Article
Publication date: 26 September 2023

Murat Demir and Gonca Balci Kilic

The purpose of this study is to explore the effect of stitch type and stitch direction on the dynamic drape behavior of the woven fabric.

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Abstract

Purpose

The purpose of this study is to explore the effect of stitch type and stitch direction on the dynamic drape behavior of the woven fabric.

Design/methodology/approach

In this paper, the effectiveness of stitch type and stitch directions on dynamic drape behaviors were investigated. Fabric parts were sewn together with two types of the stitch (lockstitch and overlock stitch) on three different stitch directions (warp, weft and bias (45°)). The static drape coefficients (SDC) of unsewn and sewn fabrics were measured according to the image process method. Dynamic drape coefficients (DDC) of fabrics were also measured using the same method at six different (25, 50, 75, 100, 125, 150 rpms) rotation speeds. Additionally, bending length and bending rigidity were measured using the Cantilever test method.

Findings

Experimental results showed that stitch type and stitch directions are effective on the dynamic drape behaviors of the fabric. Overlock stitch resulted in greater DDC than the lock stitch. For both of the stitch type, DDC for the stitch on the warp direction are greater than the stitch on the weft and bias direction for all speeds. In addition, bending length, hence the bending rigidity, are greater for overlock stitch type and always weft direction resulted in greater than the warp and bias direction.

Originality/value

Fabric drape is vital for garment appearance and is gaining popularity with the advancement of virtual technology, enabling virtual visualization of garments. While previous studies have predominantly examined either the static or dynamic drape behavior of individual fabric panels, or solely focused on the static drape behavior of sewn fabrics, this study acknowledges the significance of incorporating the influence of stitch type and direction on dynamic drape behaviors. Considering that fabrics are sewn together to create garments and that DDC provides a more accurate representation of real-time fabric behavior compared to SDC, this research makes a valuable contribution to the existing literature by investigating the impact of stitch type and direction specifically on DDC.

Details

International Journal of Clothing Science and Technology, vol. 35 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

Article
Publication date: 22 January 2024

Kemal Gürkan Küçükergin, Yakup Kemal Özekici and Gonca Güzel Şahin

This paper aims to investigate, upon taking into consideration both symmetric and asymmetric effects, how the economic and psychological impact of the coronavirus disease 2019…

Abstract

Purpose

This paper aims to investigate, upon taking into consideration both symmetric and asymmetric effects, how the economic and psychological impact of the coronavirus disease 2019 (COVID-19) pandemic, solidarity and future anxiety affect travel intention and the willingness to support a destination (WSD). Furthermore, the study sheds light on whether these relationships vary between domestic and international destinations.

Design/methodology/approach

The data are collected from 379 potential tourists. To detect and analyze the symmetrical and asymmetric effects, the covariance-based structural equation modeling (CB-SEM) and the fuzzy-set qualitative comparative analysis (fsQCA) are employed, respectively.

Findings

It is observed that, whereas only the effects of solidarity on travel intention and WSD differ in the CB-SEM, the fsQCA results include different recipes for the two groups.

Originality/value

There has not been much research done yet on the influence of future anxiety on tourists' decisions. Furthermore, it has not been thoroughly investigated whether solidarity has a different function for destinations within and outside of the country. In this respect, the study of both symmetric and asymmetric effects represents an important contribution to the literature.

Details

Journal of Hospitality and Tourism Insights, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2514-9792

Keywords

Article
Publication date: 25 March 2024

Özgür Davras and Gonca Manap Davras

The main aim of the present research is to investigate the role of sense of calling (SOC) in the relationships between human resource practices (HRP), turnover intention (TI) and…

Abstract

Purpose

The main aim of the present research is to investigate the role of sense of calling (SOC) in the relationships between human resource practices (HRP), turnover intention (TI) and employee satisfaction (ES) in the hotel industry. Moreover, it also examines whether the relationships between these variables are different for city and resort hotel employees.

Design/methodology/approach

Quantitative research was employed to test the proposed hypotheses, and the survey technique was used to collect data. The participants of the research consist of 432 hotel employees who work in Antalya, Turkey. The hypotheses were tested using the partial least squares structural equation modeling (PLS–SEM) analyses.

Findings

The results of the analysis have shown that SOC significantly impacts the ES and TI, and HRP could be a new antecedent of SOC. On the other hand, while ES is positively affected by HRP, the SOC has a moderating role in the relationship between these variables.

Practical implications

Hotel authorities' understanding of the SOC’s role in employee attitudes and behavior would be a significant factor not only in retaining them but also in reducing employee turnover. They should consider increasing employees' SOC by focusing on HRP.

Originality/value

Besides being one of the few studies that have discussed SOC in the hospitality literature, the current study also contributes by examining the role of SOC in the relationships between HRP, ES and TI. It also adds value to the calling literature by revealing whether the relationship between these variables differs for city and resort hotel employees.

Details

Journal of Hospitality and Tourism Insights, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2514-9792

Keywords

Article
Publication date: 6 March 2017

Deniz Zaptcioglu Celikdemir, Gonca Gunay, Alev Katrinli and Sebnem Penbek Alpbaz

The purpose of this paper is to define the sustainable university in Turkey, by considering perspectives of various stakeholders such as experts, intellectual, public, political…

Abstract

Purpose

The purpose of this paper is to define the sustainable university in Turkey, by considering perspectives of various stakeholders such as experts, intellectual, public, political parties and media using public opinion formation analysis. The paper aims to re-define the “sustainable university” with all dimensions including environmental, economic and social factors in Turkey.

Design/methodology/approach

In this study, the model of shaping the policy agenda and public opinion formation by certain groups, presented by Papadakis (1996), was used to determine the main characteristics of a sustainable university. Based on this model, the researchers collected data from intellectuals, experts, political parties, media and public simultaneously. Focus groups and archival search were used.

Findings

The results of the public opinion formation process presented that the definition of sustainable universities in Turkey includes the economic, ecological and social aspects and a holistic view of different groups. The findings of the study presented that the definition of sustainable universities in Turkey has many facets. Different groups in the public opinion formation process share almost similar views, though these points are usually mentioned under different headings. Thus, nearly each respondent in the public opinion formation process discusses the concept of being a “trade mark” as a university.

Research limitations/implications

The research may lack generalizability, as it takes place in Turkey, which is a non-Western country.

Practical implications

The research sheds a light for universities, which are the major cornerstones of higher education, especially in the area of sustainability and sustainable development. Also, universities have a great impact in regional development, which stresses once again the importance of sustainability in higher education. They should modify their education programs and curricula in accordance with sustainability. University–industry cooperation should be provided. They should manage to become a trademark.

Social implications

Universities being the major cornerstones of higher education play a vital role in regional development of countries; therefore, their sustainable development should be well handled to enable regional development.

Originality/value

The universities are the major actors which should pursue sustainability, as they affect society. The studies on sustainability and universities have been generally grouped under two main subjects in the literature. First group of studies highlights the support of universities for sustainability of corporations, whereas other studies stress the importance of becoming a sustainable university. There are not many studies on this subject which considers the public opinion formation process throughout the literature; therefore, this study contributes to the literature with this aspect. The study takes place in Izmir, Turkey, which is a non-Western country. Most of the studies on this subject take place in Western countries, so as the study is deployed in a non-Western country, it reflects a different point of view.

Details

International Journal of Sustainability in Higher Education, vol. 18 no. 3
Type: Research Article
ISSN: 1467-6370

Keywords

Article
Publication date: 21 March 2023

Gonca Güngör Göksu

The study aims to explore a retrospective overview of the Journal of Public Budgeting, Accounting and Financial Management, a prestigious international journal in the discipline…

Abstract

Purpose

The study aims to explore a retrospective overview of the Journal of Public Budgeting, Accounting and Financial Management, a prestigious international journal in the discipline. It also analyses the bibliometric information of its publications between 2011 and 2021 in terms of authors, countries, documents, themes, topics and sources.

Design/methodology/approach

The performance analysis and science mapping were conducted using the data from Scopus between 2011 and 2021. The bibliometric information of 301 publications was visualised through the analysis types, such as co-authorship, co-citation and bibliographic coupling, through the VOSviewer software programme.

Findings

The main finding is that the journal has recently improved in several areas (e.g. its productivity and visibility, citations, index scores and international collaborations). Although financial aspects such as accounting and accountability, financial management and public budgeting maintained their importance during the analysing period, some other features were revealed as new research themes. However, there are some research gaps regarding sustainable development goals, climate change and other matters, and the solutions for them through public fiscal policies.

Research limitations/implications

The analyses are primarily backwards oriented by their very nature. Although they were excellent at portraying the past, the findings provided limited information about subjects that would be hot topics in future. The study has some limitations. The information on publications was collected from the Scopus database. However, bibliometric analyses were conducted from 2011 to 2021 as its data on Scopus did not cover before 2011. Second, the data are dynamic over time and may contain various changes in the future. Therefore, the bibliometric analysis may be repeated by including new studies of JPBAFM in the following years.

Social implications

A performance analysing that the editorial team could benefit from in order to monitor the productivity of JPBAFM, one of the popular and favoured journals in the discipline, was conducted in this paper. The editorial team may also find ideas for the intellectual development of the journal as a result of mapping the performance of the publications.

Originality/value

The bibliographic analysis of the Journal of Public Budgeting, Accounting and Financial Management has yet to be conducted. The study presents comprehensive findings on the performance and bibliometric analysis of the journal to guide authors and readers.

Details

Journal of Public Budgeting, Accounting & Financial Management, vol. 35 no. 2
Type: Research Article
ISSN: 1096-3367

Keywords

Article
Publication date: 18 June 2021

Gonca Balci Kilic, Murat Demir and Musa Kilic

The purpose of this paper is to analyse dynamic drape behaviours of 100% wool woven suiting fabrics considering real-time usage.

Abstract

Purpose

The purpose of this paper is to analyse dynamic drape behaviours of 100% wool woven suiting fabrics considering real-time usage.

Design/methodology/approach

Dynamic drape coefficients of 100% wool woven fabrics were measured at different rotation speeds (25, 75, 125 and 175 rpm) with a commercially used fabric drape tester which works on image processing principle. Average daily walking speed of male and female volunteers was determined and the closest rotation speed was selected to calculate dynamic drape coefficient at walking (DDCw). Besides, bending rigidity and shear deformation properties, which are known to be related to the static drape behaviours of the fabrics, were also measured and the relationships between these parameters and DDCw were examined.

Findings

As a result of the experimental study, it was found that dynamic drape coefficients become greater, which means the fabrics take flatter position, with the increase of the rotation speed. In addition, it was also seen that parameters known to be related to static drape behaviours such as unit weight and bending stiffness have less effect on the dynamic drapes of fabrics. For the estimation of dynamic drape behaviour of fabrics, parameters such as static perimeter, dynamic perimeter, etc. are found more significant.

Originality/value

To date, although studies about dynamic drape behaviours of the fabrics claimed that dynamic drape gives more realistic results for in wearer experience, few of them focused on the rotation speed of dynamic drape tester for real-time usage. As dynamic drape behaviours of fabrics may differ for different rotation speed, determining appropriate speed in accordance with real-time usage gives more realistic results.

Details

International Journal of Clothing Science and Technology, vol. 33 no. 5
Type: Research Article
ISSN: 0955-6222

Keywords

Open Access
Article
Publication date: 11 August 2023

María Luisa Esteban Salvador, Emilia Pereira Fernandes, Tiziana Di Cimbrini, Charlie Smith and Gonca Güngör Göksu

This study aims to explore the impact of board size, board gender diversity and federation age on the likelihood of having a female chair in National Sports Federations (NSF).

Abstract

Purpose

This study aims to explore the impact of board size, board gender diversity and federation age on the likelihood of having a female chair in National Sports Federations (NSF).

Design/methodology/approach

A quantitative methodology compares 300 sports boards in five countries (Italy, Portugal, Spain, Turkey and the UK), using data collected from NSF’s websites.

Findings

The board size and federation age have no significant impact on having a female board chair when the countries and the percentage of female directors are included in the model. When the number of women is measured in absolute value rather than in relative terms, the only variable that predicts a woman chair is the country. When the model does not include country differences, the percentage of female directors is key in predicting a chairwoman, and when the number of women is used as a variable instead of the percentage, a board’s smaller size increases the odds of having a chairwoman.

Research limitations/implications

There are some limitations to this study which we believe provide useful directions for future research. Firstly, the authors have not considered the role of gender typing in sports activities which explains the extent that women participate in specific sports (Sobal and Milgrim, 2019) and the related perception of such sports in society. The social representation of sports activities classified as masculine, feminine or gender-neutral can hypothetically influence women’s access to that specific federations’s leadership. The authors included the country factor only partially, as a control variable, as the social representation of sports usually goes beyond national boundaries.

Practical implications

This study has implications for sport policymakers and stakeholders, and for institutions such as the IOC or the European Union that implement equality policies. If the aim is to increase female presence in the highest position of a sports board and to achieve gender equality more generally, other policies need to be implemented alongside gender quotas for the sports boards, namely, those specifically related to the recruitment and selection of the sports board chairs (Mikkonen et al., 2021). For example, given the implications of critical mass and its ability to increase more female’s engagement then the role of existing chairs acting as mentors and taking initiative in this objective may be warranted. Furthermore, attention should be paid to the existing gender portfolio of each board and its subsequent influence on recruiting a female chair, regardless of the organization’s age. Knoppers et al. (2021) concluded that resistance to gender balance by board members is often related to discriminatory discourses against women. The normalization of the discourses of meritocracy, neoliberalism, silence/passivity about the responsibility of structures and an artificial defence of diversity emphasise that equality should not only be determined by women (Knoppers et al., 2021).

Social implications

When countries are included in the model, the results suggest that the social representation of a female board member is different from that of a female board chair.

Originality/value

The originality of the study is that it shows the factors that constrain women taking up a chair position on NSFs. Theoretically, it contributes to existing literature by demonstrating how a critical mass of females on boards may also extend to the higher and most powerful position of chair.

Details

Gender in Management: An International Journal , vol. 39 no. 4
Type: Research Article
ISSN: 1754-2413

Keywords

Book part
Publication date: 19 April 2022

M. Ali Ülkü, Dawne M. Skinner and Gonca Yıldırım

The earth’s carrying capacity cannot withstand the pace of consumption resulting from current economic models, mainly the linear economy (LE) built on a throwaway culture. In the…

Abstract

The earth’s carrying capacity cannot withstand the pace of consumption resulting from current economic models, mainly the linear economy (LE) built on a throwaway culture. In the last few decades, the concept of a circular economy (CE), aiming to design waste out of the economy and mimic ecosystems, emerged as a strong alternative to LE. Being at the heart of the economic landscape, supply chains (SCs) need to respond to the necessary shift to CE. In so doing, the planning and execution of circular supply chains (CSCs) require a broader comprehension of CE and more sophisticated and large-scale analytical decision models. This chapter surveys extant literature on available best practices and quantitative models for sustainable supply chains (SSCs) and offers a new definition of CSC. Mapping on the knowledge extracted from this classification, potential gaps and strengths in the literature are identified. Key research papers on the “closed-loop” and “open-loop” ends of CSCs are highlighted. Challenges in developing CSC performance indicators and prescriptive models are emphasized.

Article
Publication date: 1 December 2006

Gonca Telli Yamamoto

The purpose of this study is to examine the university selection criteria of students for better university management with the use of marketing tools.

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Abstract

Purpose

The purpose of this study is to examine the university selection criteria of students for better university management with the use of marketing tools.

Design/methodology/approach

This study consists of a survey on students attending a foundation university in Turkey. The questionnaire method has been chosen in order to determine the important criteria having an impact on the student views towards university selection. The students had been admitted to a foundation university in the 2005‐2006 period when within the same universities various departments were included in the study.

Findings

The results indicate student evaluation and selection criteria in this period of time.

Practical implications

This paper examines the criteria that affects the selection of students and, in detail the students' point of view towards the university evaluation and selection in Turkey. This will help the university manager's decision making on the marketing tools they use.

Originality/value

Selecting a university is a long‐term commitment and a very important decision for the high school students and/or graduates. Academic, social, physical factors and facilities are some important criteria for university selection. This study concerns the importance of these criteria in detail.

Details

International Journal of Educational Management, vol. 20 no. 7
Type: Research Article
ISSN: 0951-354X

Keywords

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