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Article
Publication date: 10 June 2021

Efecan Yar and Erdem Acar

The purpose of this paper is to find the optimum configuration of the composite launch tube currently being developed in Roketsan. The winding thicknesses and winding…

Abstract

Purpose

The purpose of this paper is to find the optimum configuration of the composite launch tube currently being developed in Roketsan. The winding thicknesses and winding angles of the launch tube are selected as design variables, and three different composite material alternatives are evaluated: glass/epoxy, carbon/epoxy and aramid/epoxy.

Design/methodology/approach

In this study, structural optimization of a composite launch tube of man portable air defense system is conducted. To achieve a cost-effective design, a cost scoring table that includes structural weight, material cost, availability and manufacturability is first introduced. Then, optimization for minimum weight is conducted, where the winding thicknesses and winding angle are taken as design variables, and the safety factor value obtained by using the Tsai–Wu damage criterion is used as constraint. A surrogate-based optimization approach is used where various options for surrogate models are evaluated. Glass/epoxy, carbon/epoxy and aramid/epoxy are considered as alternative materials for the launch tube. Finally, the selection of the most cost-effective design is performed to achieve optimum cost.

Findings

Carbon fiber-reinforced epoxy matrix material provides the optimum cost-effective design for the launch tube.

Practical implications

The findings of the paper can be used to design more cost-efficient composite launch tube currently being developed in Roketsan.

Originality/value

The existing studies are based on a design approach to achieve minimum weight of the launch tubes, whereas this study introduces a design approach to achieve optimum cost.

Details

Aircraft Engineering and Aerospace Technology, vol. 93 no. 5
Type: Research Article
ISSN: 1748-8842

Keywords

Book part
Publication date: 31 October 2022

Elif Baykal

The COVID-19 pandemic has become threatening for economies, causing recession and increased unemployment rates. Many employees in the sectors affected by the crisis face…

Abstract

The COVID-19 pandemic has become threatening for economies, causing recession and increased unemployment rates. Many employees in the sectors affected by the crisis face the risks of losing their jobs, getting on unpaid leave, and decreasing their weekly working hours. Various governments including the Turkish government have started struggling with unemployment and embraced macro level measures including support for SMEs, wage subsidies, and new working models. At the micro level, implementation of flexible working methods has been encouraged and has increased with respect to scope and scale. Both governments and companies tried their best to ensure business continuity and prevent unemployment. Actually, business continuity has gained great importance for ensuring sustainability and minimizing the effects of the pandemic. However, previous studies have revealed that approximately 25% of companies all over the world have a continuity plan. This chapter aims to examine the effects of the pandemic and macro level and micro level measures taken by Turkish authorities to mitigate the effects of the pandemic on employment rates and business continuity, thus providing insight into crisis management through a real experience. This study also attempts to explain how Turkish authorities can contribute to the Sustainable Development Goals (SDGs) through pandemic measures and teleworking.

Details

Business in the 21st Century
Type: Book
ISBN: 978-1-80382-788-9

Keywords

Article
Publication date: 20 November 2020

Gabriel Caldas Montes and Julyara Costa

Since sovereign ratings provided by credit rating agencies (CRAs) are a key determinant of the interest rates a country faces in the international financial market and…

Abstract

Purpose

Since sovereign ratings provided by credit rating agencies (CRAs) are a key determinant of the interest rates a country faces in the international financial market and once sovereign ratings may have a constraining impact on the ratings assigned to domestic banks or companies, some studies have focused on identifying the determinants of sovereign credit risk assessments provided by CRAs. In particular, this study estimates the effect of fiscal credibility on sovereign risk using four different comprehensive credit rating (CCR) measures obtained from CRAs' announcements and two different fiscal credibility indicators.

Design/methodology/approach

We build comprehensive credit rating (CCR) measures to capture sovereign risk. These measures are calculated using sovereign ratings, the rating outlooks and credit watches issued by the three main credit rating agencies (S&P, Moody's and Fitch) for long-term foreign-currency Brazilian bonds. Based on monthly data from 2003 to 2018, we use different econometric estimation techniques in order to provide robust results.

Findings

The results indicate that fiscal credibility exerts both short- and long-run effects on sovereign risk perception, and macroeconomic fundamentals are important long-run determinants.

Practical implications

Since fiscal credibility reflects the government's ability to maintain budgetary balance and sustainable public debt, the government should keep its commitment to responsible fiscal policies so as not to deteriorate expectations formed by financial market experts about the fiscal scenario and, thus, to achieve better credit assessments issued by CRAs with respect to sovereign debt bonds. Sovereign credit rating assessment is a voluntary practice. It is up to the country whether they want to apply for a rating assessment or not. Thus, without a sovereign rating, one must find an alternative to measure the sovereign risk of a country. In this sense, an important practical implication that this study provides is that fiscal credibility can be used as a leading indicator of sovereign risk perceptions obtained from CRAs or even as a proxy for sovereign risk.

Originality/value

This paper is the first to verify how important the expectations of financial market experts in relation to the fiscal effort required to keep public debt at a sustainable level (i.e. fiscal credibility) are to sovereign risk perception of credit rating agencies. In this sense, the study is the first to address this relation, and thus it contributes to the literature that seeks to understand the determinants of sovereign ratings in emerging countries.

Details

International Journal of Emerging Markets, vol. 17 no. 3
Type: Research Article
ISSN: 1746-8809

Keywords

Book part
Publication date: 6 April 2021

Yeter Demir Uslu, Emre Yılmaz and Pakize Yiğit

In this study, it is aimed to correctly weigh the criteria for the selection of qualified manager in a healthcare facility and to make the right selection among candidates…

Abstract

In this study, it is aimed to correctly weigh the criteria for the selection of qualified manager in a healthcare facility and to make the right selection among candidates with an objective method. In this study, in which the health manager selection was carried out with fuzzy Analytical Hierarchy Process (AHP) and MULTIMOORA methods, 8 candidates were evaluated according to 12 personnel selection criteria. Comparative matrices of qualified health manager selection criteria were presented to the expert opinion and analyzed with the fuzzy AHP method. According to the analysis result, among the 12 criteria; The “Crisis Management Skill” criterion is in the first place with 12.5% weight; The “Social Responsibility Awareness” criterion was found to be in the last place with 3.2% weight. The MULTIMOORA method was applied by analyzing the interview scores and criterion weightings of the candidates evaluated by the jury. According to the results of MULTIMOORA, Candidate 1 first place and Candidate 6 ranked last.

Details

Strategic Outlook in Business and Finance Innovation: Multidimensional Policies for Emerging Economies
Type: Book
ISBN: 978-1-80043-445-5

Keywords

Content available
Book part
Publication date: 21 January 2022

Abstract

Details

Industry 4.0 and Global Businesses
Type: Book
ISBN: 978-1-80117-326-1

Article
Publication date: 17 July 2020

Ece Ömüriş, Ferda Erdem and Janset Özen Aytemur

This study aims to investigate the relationship between cooperative and competitive behavioral tendencies and trust of coworkers in organizations. Two main hypotheses were…

Abstract

Purpose

This study aims to investigate the relationship between cooperative and competitive behavioral tendencies and trust of coworkers in organizations. Two main hypotheses were developed. The first hypothesis was that cooperativeness and trust in coworkers is positively correlated. The second hypothesis was that competitiveness and trust in coworkers is negatively correlated.

Design/methodology/approach

The sample was 442 Turkish tourism sector employees in a labor-intensive industry. Two scales were used to measure trust in coworkers and cooperativeness/competitiveness. A hierarchical regression analysis was performed to understand how individuals' behavioral tendency affects their coworkers' trust in them.

Findings

The findings strongly supported the first hypothesis, in that cooperativeness was positively correlated with trust in coworkers. The second hypothesis was only partially supported because there was no significant relationship between competitiveness and the competency and trustworthiness dimensions of trust. Unselfishness aspect of trust, however, was negatively correlated with competitiveness.

Research limitations/implications

The main contribution of this study is to show that employee cooperativeness and competitiveness can affect trust in coworker relations. However, the measurement of competitiveness and cooperativeness measurement had limitations due to differences in the culture-specific meanings of cooperation and competition. Future research employing mixed methods research is needed to further explain the content of the two tendencies and the relationship between the concepts.

Originality/value

The literature on trust and employee relations tends to focus more on the issue of trust between managers and subordinates while neglecting the complex and multifaceted structure of trust in employee–employer relations. However, new working forms mean that horizontal relations are increasingly important. Therefore, more research is needed to address the tendencies and structures that affect trust in coworkers. This study draws attention to the potential role of cooperative and competitive behaviors in trust in horizontal employee relations.

Details

Evidence-based HRM: a Global Forum for Empirical Scholarship, vol. 8 no. 3
Type: Research Article
ISSN: 2049-3983

Keywords

Article
Publication date: 11 October 2018

Lova Rajaobelina, Caroline Lacroix and Anik St-Onge

The purpose of this paper is to investigate the impact of five dimensions of experiential advertising (cognitive, emotional, sensory, relational and behavioural) on…

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Abstract

Purpose

The purpose of this paper is to investigate the impact of five dimensions of experiential advertising (cognitive, emotional, sensory, relational and behavioural) on advertising credibility in the banking sector.

Design/methodology/approach

A total of 277 undergraduate students were asked to complete a questionnaire after viewing two versions of a bank advertisement. Results were analysed using structural modelling equations (EQS 6.2).

Findings

Findings show that all dimensions of experiential advertising positively impact advertisement credibility. Cognitive/emotional/sensory advertisements exert the greatest impact, followed by relational and then behavioural advertisements which have only a marginal impact. Post hoc results show that the impact of experiential advertising on advertising credibility varies according to both actor and respondent gender.

Originality/value

This study enhances the literature on experiential marketing and credibility, especially banking sector advertising, and provides more in-depth insight into the role of respondent and actor gender in influencing responses. Financial services practitioners would be well advised to devote particular attention to the formulation of experiential strategies when developing advertising campaigns.

Details

International Journal of Bank Marketing, vol. 37 no. 1
Type: Research Article
ISSN: 0265-2323

Keywords

Book part
Publication date: 10 February 2020

Seval Kardeş Selimoğlu and Mehtap Altunel

Along with accounting scandals in the past, academics, researchers, and legislators have focused on fraud. The purpose of this study is to examine postgraduate and…

Abstract

Along with accounting scandals in the past, academics, researchers, and legislators have focused on fraud. The purpose of this study is to examine postgraduate and doctoral studies, articles, and books about forensic accounting and fraud audit published between the years 2008 and 2018 in Turkey. For this purpose, a total of 96 studies have been examined and 35 of these are master’s theses, 10 of them are PhD theses, 45 of them are articles, and six of them are books. These studies were presented in tables as classified. The studies examined in our research are summarized as year they were published, the author, and the scope of the topic and in terms of results. The conclusions of this study can be summarized as follows: (a) the majority of thesis published about forensic accounting and fraud audit are in 2011 and following years. In addition, most of the theses are focused on forensic accounting review rather than fraud audit. (b) Results in the articles reviewed are in the same direction with theses. (c) There are very few books about fraud audit and forensic accounting. One of them is related to fraud audit, while the rest of them are related to forensic accounting and forensic accounting profession. We suggest extending the scope of the study and making to other countries.

Details

Contemporary Issues in Audit Management and Forensic Accounting
Type: Book
ISBN: 978-1-83867-636-0

Keywords

Article
Publication date: 14 December 2017

Mahmoud Abdulai Mahmoud, Robert E. Hinson and Patrick Amfo Anim

The purpose of this paper is to explore the relationships between service innovation, customer value creation (CVC) and customer satisfaction (CS) with specific emphasis…

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Abstract

Purpose

The purpose of this paper is to explore the relationships between service innovation, customer value creation (CVC) and customer satisfaction (CS) with specific emphasis to Ghanaian telecommunication operators.

Design/methodology/approach

Assuming a positivist philosophical approach with a quantitative data analysis technique, the study samples 510 registered adult customers of at least one telecommunication network in Ghana. An exploratory factor analysis, confirmatory factor analysis and structural equation modeling were used to assess and confirm the proposed scales validity and the relationships of the research model.

Findings

The study unveiled that a service firm’s ability to achieve CS is dependent on how telecommunication operators harness and deploy their service innovation activities. In addition, the study showed that CVC mediates the relationship between service innovation and CS. Thus, service innovation must create value for customers in order to enhance CS.

Practical implications

By relating the study findings to firms’ innovation strategies, managers can improve the strength of their service offerings to achieve CS by spending more on consumer research, market research and increased customer interactions.

Originality/value

Considering the uniqueness of this study in a Ghanaian context, the research draws on two influential theories, which are signaling theory and expectation disconfirmation theory to examine the differential role played by service innovation in enabling telecommunication operators in Ghana, to create customer value in order to achieve CS amidst the constraints in the business environment.

Details

European Journal of Innovation Management, vol. 21 no. 3
Type: Research Article
ISSN: 1460-1060

Keywords

Article
Publication date: 5 May 2020

Erdem Çiftçi and Adnan Sözen

The purpose of this study is to experimentally and numerically scrutinize the heat transfer enhancement in pool boiling and condensation by changing the hydrophilicity or…

516

Abstract

Purpose

The purpose of this study is to experimentally and numerically scrutinize the heat transfer enhancement in pool boiling and condensation by changing the hydrophilicity or hydrophobicity properties of the working fluid, i.e. by use of nanofluid solution.

Design/methodology/approach

For specifying the effects of nanoparticle concentration on heat transfer properties, two different nanofluid solutions (h-BN/DCM and SiO2/DCM) at three different volumetric concentrations were prepared and tested under different heat flux conditions. Boiling curves, alterations in pressure with heat flux and heat transfer coefficients for both boiling and condensation processes were obtained and viscosity measurements were performed for dichloromethane (DCM) and each working fluid was prepared. In addition, a series of numerical simulations, via computational fluid dynamics approach, was performed for specifying the evaporation–condensation phenomena and temperature and velocity distributions.

Findings

Nanoparticle addition inside the base fluid increased the thermal characteristics of the base fluid significantly. For the experimental results of h-BN/DCM nanofluid, the increment rate in heat transfer coefficient for saturation boiling, after-saturation boiling and condensation processes was found as 27.59%, 14.44% and 15%, respectively.

Originality/value

The novelty of this comparison study is that there is no such experimental and numerical comparison study in literature for DCM fluid, which concentrates on thermal performance enhancement and compares the effect of different kinds of nanoparticles on heat transfer characteristics for boiling–condensation processes.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 1
Type: Research Article
ISSN: 0961-5539

Keywords

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