Search results
1 – 10 of 17Yildiz Kose, Suleyman Muftuoglu, Emre Cevikcan and Mehmet Bulent Durmusoglu
Autonomous maintenance (AM), one of the pillars of total productive maintenance (TPM), aims to achieve performance toward zero defects and zero breakdowns. AM system equipped with…
Abstract
Purpose
Autonomous maintenance (AM), one of the pillars of total productive maintenance (TPM), aims to achieve performance toward zero defects and zero breakdowns. AM system equipped with comprehensive lean tools provides continuous improvement during the AM activities. Despite its long duration, establishing a lean AM system with a robust guideline would provide significant benefits such as high quality and short lead time. Therefore, AM design approach should be provided in a holistic and detailed manner. This study aims to develop a framework for AM design, including preliminary, reactive, preventive and proactive steps using the axiomatic design (AD).
Design/methodology/approach
Requirements and technical parameters of the AM system are explored with AD. An extensive literature review and a real-life application are presented.
Findings
The proposed design was validated by adapting the proposed roadmap to a textile manufacturing system in Turkey. The application results justify the established AM system design with an average downtime improvement of 69.2% and the average elapsed time between two failures improvement of 65.1% for apparel department.
Originality/value
This study has the novelty of establishing an overall AM system design with all of its stages stepwise. It presents a comprehensive guideline in terms of integration of lean philosophy into AM design by generating maintenance-related use cases for lean tools. The developed approach facilitates creating and analyzing complex systems to improve maintenance implementations while reducing nonvalue-added operations.
Details
Keywords
An appropriate space allocation among different residence types gives higher profitability and liquidity for cash flow management in real estate projects for developers. Thereby…
Abstract
Purpose
An appropriate space allocation among different residence types gives higher profitability and liquidity for cash flow management in real estate projects for developers. Thereby, a balance between debt and equity should be kept for capital formation in developers where high level of cost, profit and risk exists. The purpose of this paper is to provide cash flow optimization under debt and equity financing while providing an appropriate space allocation of residence types via synchronous consideration of profitability and liquidity.
Design/methodology/approach
A novel optimization methodology that includes project financing, optimization and experimental design modules is proposed. The first module, project financing, considers the flexibility of utilizing one or both of debt financing and equity financing when making capital. The optimization module addresses space allocation among different residence types for a construction while maximizing profitability and liquidity using two mixed-integer linear programming models in a pre-emptive manner. The experimental design module assesses the effects of decisive parameters within the methodology via multivariate analysis of variance (MANOVA).
Findings
The proposed methodology is applied to a real-life residential project in Istanbul. The optimization module yielded 42.5% profitability via the first linear programming model and 2.2% trade-off between liquidity and profitability while minimizing the payback period by the second linear programming model. Meanwhile, MANOVA results showed that profit per square meter and sale rate trends are the most prominent factors considering their significant effects on net present value and payback period.
Originality/value
To the best knowledge of the author, related papers focused only on profitability under equity financing. Liquidity (as an objective) and equity financing (as a financing method) have not been handled. Hence, this paper not only performs profitability and liquidity-oriented cash flow optimization under debt and equity financing but also optimizes space allocation of residences for the first time.
Details
Keywords
Gonzalo Lorenzo, Alba Gilabert Cerdá, Alejandro Lorenzo-Lledó and Asunción Lledó
More and more diversity is present in our classrooms. As teachers, we must be able to respond to the different levels of learning presented by our students. Therefore, it is…
Abstract
Purpose
More and more diversity is present in our classrooms. As teachers, we must be able to respond to the different levels of learning presented by our students. Therefore, it is necessary to use the new emerging technologies as elements of response. Thus, the purpose of this paper is to develop a systematic and thematic review of the application of augmented reality (AR) in the learning of autistic students in the educational setting during the period 1996–2020 using the Web of Science and Scopus databases.
Design/methodology/approach
For this purpose, one of the bibliometric techniques called systematic and thematic review has been used. This technique is supported by the preferred reporting items for systematic reviews methodology, and it uses a quantitative and qualitative approach. The thematic analysis will be carried out on 28 documents based on a series of indicators, including sample size, hardware devices, way of storing the information and findings obtained in the research.
Findings
The results of the work indicate that the average size of the sample is three participants, and that the most worked area has been social skills using tablets. In addition, bookmarks are often used as an element of information storage in AR.
Originality/value
The main contribution of this work focuses on the establishment of a series of thematic variables that will serve for the later development of an action protocol for the creation of AR activities for autistic students.
Details
Keywords
Safak Kaya, Esref Arac, Fethiye Akgul, Senol Comoglu, Sehmuz Kaya, Songul Araç, Yesim Yildiz, Seyit Ali Buyuktuna, Bircan Kayaaslan, Emine Parlak, Birol Baysal, Faruk Karakecili, Elif Zelal Balik, Ali Akkoç, Kevser Ozdemir, Seyhmus Kavak, Suat Ali Dogan, Emrah Günay, Semsi Nur Karabela, Mehmet Cabalak, Yasemin Cag, Veli Avci, Yasemin Durdu, Zehra Kaya, Damla Kilic, Halis Yerlikaya, Hüseyin Tarakçı, Osman Mentes, Ayse Sağmak Tartar, Adem Kose, Omer Faruk Alakus, Ulas Aktas, Halil Komek and Selcuk Aksoz
This paper aims to determine the knowledge and attitudes of the physicians regarding human immunodeficiency virus (HIV)/acquired immune deficiency syndrome (AIDS), to emphasize…
Abstract
Purpose
This paper aims to determine the knowledge and attitudes of the physicians regarding human immunodeficiency virus (HIV)/acquired immune deficiency syndrome (AIDS), to emphasize that these patients exist and they will exist in the future and to raise awareness so as to prevent that their rights to treatment are revoked.
Design/methodology/approach
The survey was conducted via a link sent through an online system. Random physicians from 81 cities of the country were invited to the survey. The survey has 41 questions regarding knowledge and attitudes in total, including epidemiological information such as age, gender and title.
Findings
A total of 3,107 physicians has voluntarily participated in the study. In total, 2,195 (70.7%) are internal physicians and 912 (29.3%) are surgical physicians among the participant physicians. In total, 1,452 (46.7%) of the participants are specialist physicians, 608 (19.6%) of the participants are practising physician and the rest of it is physician assistants, academicians and dentists, respectively.
Originality/value
In this study, it has been found out that the physicians have a lack of knowledge on HIV/AIDS and they adopt a discriminatory attitude towards HIV-positive persons. HIV-positive patients who are exposed to discrimination and scared of being uncovered refrain from applying to hospitals for treatment, which puts public health into jeopardy due to the high viral load and these patients are faced with difficulties in coping with both medical and emotional load of the disease.
Details
Keywords
Guler Aras, Nuray Tezcan and Ozlem Kutlu Furtuna
The purpose of this paper is to assess the financial performance of the intermediary institutions that have operated in the Turkish capital markets taking the issue of bank-origin…
Abstract
Purpose
The purpose of this paper is to assess the financial performance of the intermediary institutions that have operated in the Turkish capital markets taking the issue of bank-origin and non-bank-origin institutions into account.
Design/methodology/approach
Financial performance of the intermediary institutions has been measured by the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method between the years 2005 and 2016. In order to implement the TOPSIS method, the relative importance of financial performance indicators has been determined by Entropy, survey results and considering equal weights approaches.
Findings
Empirical findings indicate that the average performances of continuously operating intermediary institutions during the concerned period are above the average performance levels of all intermediaries. Additionally, the average rank of bank-origin intermediary institutions have been found higher than the non-bank origins for all years. This reveals that the average financial performance of the bank-origin intermediary institutions is higher than the average score of non-bank origins during the related years.
Originality/value
This study is unique in terms of evaluating the performance of intermediary institutions in Turkish capital markets with a comprehensive framework. Determining the relative importance of financial performance indicators according to entropy, survey results and equal-weight approaches and revealing the average financial performance ranking methodology for bank-origin and non-bank-origin intermediary institutions have added value.
Details
Keywords
Mahtab Pouratashi and Asghar Zamani
This study aimed to understand university students' knowledge, attitude and behavior (KAB) toward sustainable development.
Abstract
Purpose
This study aimed to understand university students' knowledge, attitude and behavior (KAB) toward sustainable development.
Design/methodology/approach
A sample of 567 students studying humanities, agriculture or engineering at public universities of Iran participated in this study. A survey was administered to investigate KAB of the respondents according to their gender, membership in academic associations, academic major, educational and informing activities and social units; abbreviated as GAMES.
Findings
The results indicated that students had a medium level of KAB, with mean scores of 55.15 out of 75 (for knowledge), 45.68 out of 65 (for attitude) and 36.03 out of 50 (for behavior). Differences and similarities were found on students' KAB by GAMES. The results suggest that education and social units are useful to improve individuals' KAB toward sustainable development. In addition, positive correlations were identified between knowledge, attitude and behavior toward sustainable development.
Originality/value
The findings confirmed the key role of education for sustainable development in addressing sustainable development (SD).
Details
Keywords
Tobias Müller, Florian Schuberth and Jörg Henseler
Sports marketing and sponsorship research is located at the intersection of behavioral and design research, which means that it analyzes the current world and shapes a future…
Abstract
Purpose
Sports marketing and sponsorship research is located at the intersection of behavioral and design research, which means that it analyzes the current world and shapes a future world. This dual focus poses challenges for formulating and testing theories of sports marketing.
Design/methodology/approach
This article develops criteria for categorizing theoretical concepts as either behavioral or formed as different ways of expressing ideas of sports marketing research. It emphasizes the need for clear concept categorization for proper operationalization and applies these criteria to selected theoretical concepts of sports marketing and sponsorship research.
Findings
The study defines three criteria to categorize theoretical concepts, namely (1) the guiding idea of research, (2) the role of observed variables, and (3) the relationship among observed variables. Applying these criteria to concepts of sports marketing research manifests the relevance of categorizing theoretical concepts as either behavioral or formed to operationalize concepts correctly.
Originality/value
This study is the first in sports marketing to clearly categorize theoretical concepts as either behavioral or formed, and to formulate guidelines on how to differentiate behavioral concepts from formed concepts.
Details
Keywords
Beyza Himmetoğlu, Damla Ayduğ and Coşkun Bayrak
The main aim of the research is to investigate the relationships among primary school teachers' perceptions on coworker social loafing, organizational justice and task…
Abstract
Purpose
The main aim of the research is to investigate the relationships among primary school teachers' perceptions on coworker social loafing, organizational justice and task visibility. It is also examined whether teachers' opinions on organizational justice and task visibility are statistically significant predictors of their perceptions on coworker social loafing.
Design/methodology/approach
Research was designed by using correlational survey model. The sample of the study consisted of 656 teachers selected by cluster sampling method among primary school teachers working in Eskisehir.
Findings
Research results showed that teachers' perceptions on their coworkers' social loafing levels were low, while their perceptions on organizational justice and task visibility were high. Furthermore, it was determined that distributive justice and task visibility predicted 13% of teachers' perceptions about their coworkers' social loafing levels. According to this finding, as teachers' perceptions of distributive justice and task visibility increase, their perceptions about coworker social loafing decrease.
Originality/value
This paper is unique in terms of examining the most probable antecedents of social loafing perceptions according to the literature among teachers which are organizational justice and task visibility together in Turkey context. The facts that social loafing studies are rare and hardly encountered among studies in the field of educational administration distinguish this study and make it appropriate to be published in a journal whose scope includes creation of an environment in which the management of resources provides the most efficient outputs.
Details
Keywords
Ramazan Köse, Levent Urtekin, Ali Ceylan, Serdar Salman and Fehim Findik
The aim of the research is to investigate the influence of ceramic coating on the wear performance of machine parts.
Abstract
Purpose
The aim of the research is to investigate the influence of ceramic coating on the wear performance of machine parts.
Design/methodology/approach
Ductile cast iron parts were coated using ceramics. Three ceramics were used for this purpose. These coated parts were subjected to wear tests under a stable load. A pin‐on‐disc wear test apparatus was used.
Findings
As a result of this study, the following findings are reported: According to ASTM G 99‐90 pin‐on‐disc experiments, Cr2O3 was found to be best coating material with low wearing rate. Within row, Al2O3 and ZrO2 can be given. According to the previous work, motor parts for example piston ring, cylinder liner and engine valve can be coated with ceramic. In this study, it is observed that the figure of merit is increased in this study. Only wearing data is given in this research. The other results are also supporter of the results taken from the wearing experiments. As a result, due to the decrease in heat loss and coaling stability of part can provide good results. With these, by coating there is a decrease in oil reduction.
Research limitations/implications
Coatings were limited with three ceramics, a stable load was used, and coated parts were subjected to wear test.
Practical implications
For future work, instead of using other coating materials, Cr2O3 is used for the best coating material with low wearing rate. By this process, working life of the machine parts can be extended and a number of economical advantages may also be obtained.
Originality/value
This paper fulfills identified information needs and offers practical help to the industrial firms working with ceramic coating and also to the academicians working on wear of materials.
Details