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Article
Publication date: 2 October 2019

Mansoor Ahmad, Ayhan Bozkurt and Omid Farhanieh

This paper aims to Separation and sorting of biological cells is desirable in many applications for analyzing cell properties, such as disease diagnostics, drugs delivery…

352

Abstract

Purpose

This paper aims to Separation and sorting of biological cells is desirable in many applications for analyzing cell properties, such as disease diagnostics, drugs delivery, chemical processing and therapeutics.

Design/methodology/approach

Acoustic energy-based bioparticle separation is a simple, viable, bio-compatible and contact-less technique using, which can separate the bioparticles based on their density and size, with-out labeling the sample particles.

Findings

Conventionally available bioparticle separation techniques as fluorescence and immunomagnetic may cause a serious threat to the life of the cells due to various compatibility issues. Moreover, they also require an extra pre-processing labeling step. Contrarily, label-free separation can be considered as an alternative solution to the traditional bio-particle separation methods, due to their simpler operating principles and lower cost constraints. Acoustic based particle separation methods have captured a lot of attention among the other reported label-free particle separation techniques because of the numerous advantages it offers.

Practical implications

This study tries to briefly cover the developments of different acoustic-based particle separation techniques over the years. Unlike the conventional surveys on general bioparticles separation, this study is focused particularly on the acoustic-based particle separation. The study would provide a comprehensive guide for the future researchers especially working in the field of the acoustics, in studying and designing the acoustic-based particle separation techniques.

Originality/value

The study insights a brief theory of different types of acoustic waves and their interaction with the bioparticles is considered, followed by acoustic-based particle separation devices reported till the date. The integration of acoustic-based separation techniques with other methods and with each other is also discussed. Finally, all major aspects like the approach, and productivity, etc., of the adopted acoustic particle separation methods are sketched in this article.

Details

World Journal of Engineering, vol. 16 no. 6
Type: Research Article
ISSN: 1708-5284

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Article
Publication date: 19 August 2024

Ibrahim T. Teke and Ahmet H. Ertas

The paper's goal is to examine and illustrate the useful uses of submodeling in finite element modeling for topology optimization and stress analysis. The goal of the study is to…

133

Abstract

Purpose

The paper's goal is to examine and illustrate the useful uses of submodeling in finite element modeling for topology optimization and stress analysis. The goal of the study is to demonstrate how submodeling – more especially, a 1D approach – can reliably and effectively produce ideal solutions for challenging structural issues. The paper aims to demonstrate the usefulness of submodeling in obtaining converged solutions for stress analysis and optimized geometry for improved fatigue life by studying a cantilever beam case and using beam formulations. In order to guarantee the precision and dependability of the optimization process, the developed approach will also be validated through experimental testing, such as 3-point bending tests and 3D printing. Using 3D finite element models, the 1D submodeling approach is further validated in the final step, showing a strong correlation with experimental data for deflection calculations.

Design/methodology/approach

The authors conducted a literature review to understand the existing research on submodeling and its practical applications in finite element modeling. They selected a cantilever beam case as a test subject to demonstrate stress analysis and topology optimization through submodeling. They developed a 1D submodeling approach to streamline the optimization process and ensure result validity. The authors utilized beam formulations to optimize and validate the outcomes of the submodeling approach. They 3D-printed the optimized models and subjected them to a 3-point bending test to confirm the accuracy of the developed approach. They employed 3D finite element models for submodeling to validate the 1D approach, focusing on specific finite elements for deflection calculations and analyzed the results to demonstrate a strong correlation between the theoretical models and experimental data, showcasing the effectiveness of the submodeling methodology in achieving optimal solutions efficiently and accurately.

Findings

The findings of the paper are as follows: 1. The use of submodeling, specifically a 1D submodeling approach, proved to be effective in achieving optimal solutions more efficiently and accurately in finite element modeling. 2. The study conducted on a cantilever beam case demonstrated successful stress analysis and topology optimization through submodeling, resulting in optimized geometry for enhanced fatigue life. 3. Beam formulations were utilized to optimize and validate the outcomes of the submodeling approach, leading to the successful 3D printing and testing of the optimized models through a 3-point bending test. 4. Experimental results confirmed the accuracy and validity of the developed submodeling approach in streamlining the optimization process. 5. The use of 3D finite element models for submodeling further validated the 1D approach, with specific finite elements showing a strong correlation with experimental data in deflection calculations. Overall, the findings highlight the effectiveness of submodeling techniques in achieving optimal solutions and validating results in finite element modeling, stress analysis and optimization processes.

Originality/value

The originality and value of the paper lie in its innovative approach to utilizing submodeling techniques in finite element modeling for structural analysis and optimization. By focusing on the reduction of finite element models and the creation of smaller, more manageable models through submodeling, the paper offers designers a more efficient and accurate way to achieve optimal solutions for complex problems. The study's use of a cantilever beam case to demonstrate stress analysis and topology optimization showcases the practical applications of submodeling in real-world scenarios. The development of a 1D submodeling approach, along with the utilization of beam formulations and 3D printing for experimental validation, adds a novel dimension to the research. Furthermore, the paper's integration of 1D and 3D submodeling techniques for deflection calculations and validation highlights the thoroughness and rigor of the study. The strong correlation between the finite element models and experimental data underscores the reliability and accuracy of the developed approach. Overall, the originality and value of this paper lie in its comprehensive exploration of submodeling techniques, its practical applications in structural analysis and optimization and its successful validation through experimental testing.

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Article
Publication date: 14 August 2017

Ayhan Aydogdu, Serhat Burmaoglu, Ozcan Saritas and Serhat Cakir

Technologies are constantly developed to address new demands and provide further opportunities. Owing to a number of potential application areas of nanotechnologies within this…

921

Abstract

Purpose

Technologies are constantly developed to address new demands and provide further opportunities. Owing to a number of potential application areas of nanotechnologies within this sector, the purpose of this study is to take defense as a case and propose a strategic roadmap for the use of nanotechnologies in the Turkish Defense Industry.

Design/methodology/approach

The study presented in this paper uses a bibliometric analysis of the most cited publications in the past decade with the aim of identifying the trends in the development of nanotechnology. Interviews were carried out with experts based on the featured words of bibliometric analysis (nanoparticles, nanostructure, self-assembly, drug delivery, graphene, etc.) to reveal the commercialization time of nanotechnology products and applications. After that, a survey was carried out with engineers for determining the possible emergence time of nanotechnology applications and/or products used in military up to year 2035. Finally, a roadmap was created based on the obtained data from bibliometric analysis, interviews and survey results.

Findings

Nanotechnology roadmap was prepared, one which would contribute to the preparation of the defense industry for the future and help in keeping up with technological developments.

Research limitations/implications

Because of the chosen research approach, the research results may lack generalizability. Therefore, researchers are encouraged to test the proposed propositions further. Interviews and surveys have limitation with the bounded rationality of corresponders.

Practical implications

The paper proposed a nanotechnology roadmap for the defense sector with a data-led foresight practice.

Originality/value

Performing such a study is considered to be crucial for the armies of developed and developing countries, so that the military sector also avails benefits from this revolutionary technology. Quantitative and qualitative methods were mixed for developing the roadmap.

Details

foresight, vol. 19 no. 4
Type: Research Article
ISSN: 1463-6689

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Book part
Publication date: 16 September 2014

Macid Ayhan Melekoğlu

As a result of human right movements, the importance of special needs of individuals with disabilities has become more prominent in many countries in the world. Hence, endeavors…

Abstract

As a result of human right movements, the importance of special needs of individuals with disabilities has become more prominent in many countries in the world. Hence, endeavors of people with disabilities, their family members, and advocates to seek accessible communities and equal opportunities for education, as well as, job placement have been widely accepted as human rights for individuals with disabilities. Consequently, establishing barrier-free environments and inclusive societies for people with disabilities have become important indicators of social development of countries. Besides, since education is considered as a fundamental human right, the importance of providing special education for children with disabilities has been recently realized by many nations (United Nations. (2006). World programme of action concerning disabled persons. New York, NY: United Nations). Turkey is one of those countries that have quite recently started to invest in special education services for its citizens with disabilities. This chapter focuses on the development, as well as the current state of special education in Turkey. Included in this development are the following sections: origins of Turkish special education, prevalence and incident rates, trends in laws and regulations, educational interventions, working with families, teacher preparation, progress that has been made, and special education challenges that exist.

Details

Special Education International Perspectives: Practices Across the Globe
Type: Book
ISBN: 978-1-78441-096-4

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Book part
Publication date: 13 April 2023

Samet Hacilar, Ayhan Kapusuzoglu and Nildag Basak Ceylan

The main purpose of this study is to measure financial literacy of individual pension system customers in Ankara and to find out factors affecting financial literacy while…

Abstract

The main purpose of this study is to measure financial literacy of individual pension system customers in Ankara and to find out factors affecting financial literacy while acquiring additional information on financial decisions of individual pension system customers. The results show that the self-financial knowledge evaluation of individual pension system customers and their financial literacy are not compatible. Besides, the financial literacy levels of the customers who make their investment themselves and customers who leave investment decision to the individual pension system company are found not to be statistically significant although self-investors believe they have higher financial knowledge. In addition to this, the effects of financial literacy level in terms of renewable energy investments are also evaluated. Individuals with an increasing level of financial literacy may turn to renewable energy sources and investments because of their low-cost and high-return potential.

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Article
Publication date: 3 June 2024

Meryem Elif Öztürk, Hacı Ömer Yılmaz, Nida Tokaç Er, Gökcen Doğan, Çağdaş Salih Meriç and Nurcan Yabancı Ayhan

Emotions affect food intake and food choice. Therefore, this paper aims to investigate the relationship between sociodemographic factors, eating habits and anthropometric…

143

Abstract

Purpose

Emotions affect food intake and food choice. Therefore, this paper aims to investigate the relationship between sociodemographic factors, eating habits and anthropometric measurements and negative and positive emotional eating.

Design/methodology/approach

This cross-sectional study was conducted with 343 female college students 18–24 years of age. Data were collected using the Emotional Appetite Questionnaire (EMAQ). Anthropometric measurements were obtained (height, weight, triceps skinfold thickness, neck, mid-upper arm, waist and hip circumference). Sociodemographic factors and lifestyle and eating habits were questioned. Generalized linear models were used to identify each EMAQ score.

Findings

While high body mass index (BMI) was associated with high negative emotional eating scores, low BMI was related to high positive emotional/situation eating scores (p < 0.01). There was no relationship between waist circumferences (p = 0.09), triceps skinfold thickness (p = 0.09) and negative emotional eating. Participants consuming vegetables and fruit = 5 portions/day had higher negative emotional eating scores, regardless of BMI (p = 0.04). Smokers (p < 0.01) and participants doing regular physical activity (p = 0.02) had lower positive emotional eating scores.

Research limitations/implications

Negative emotional eating was related to higher BMI but not adiposity. Active female participants were less likely to eat in response to positive emotions.

Originality/value

To the best of the authors’ knowledge, this is one of the first studies examining positive emotion scores from many aspects. The authors also investigated the association between emotional eating and anthropometric measurements by using different methods, including neck and mid-upper arm circumference and triceps skinfold thickness.

Details

Nutrition & Food Science , vol. 54 no. 5
Type: Research Article
ISSN: 0034-6659

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Article
Publication date: 8 May 2018

Zeynep Tatli, Nursel Uğur and Ünal Çakiroğlu

The purpose of this paper is to reveal the contribution of the digital storytelling to the peer assessments experiences of pre-service teachers within the teaching practices.

478

Abstract

Purpose

The purpose of this paper is to reveal the contribution of the digital storytelling to the peer assessments experiences of pre-service teachers within the teaching practices.

Design/methodology/approach

The study is carried out as a special case study. Both qualitative and quantitative data gathering tools were used together to investigate a special case in depth (Yıldırım and Şimşek, 2011; Çepni, 2007). In this study, the case investigated was the process whereby the senior year pre-service teachers enrolled in the faculty of education provided assessments of themselves and their peers through the teaching practice course, using digital storytelling. The contributions of the assessment method employed, in the experiences and personal development of the pre-service teachers, were investigated through interviews with pre-service teachers involved.

Findings

The results suggested that pre-service teachers’ perspectives were quite positive toward the use of digital storytelling for peer assessment in their teaching practices. The prominent contributions were: they caused easily tolerate personally as they did not take a direct form, and that they considered peer assessment through digital storytelling as an alternative means of assessment to effectively reflect the process. Receiving more detailed feedback about their classroom experiences and their teaching skills was helpful for pre-service IT teachers. Suggestions due to the findings were also included.

Originality/value

In the study, peer assessment digital stories in the teaching practice courses offers the benefits of confidence with, different perspectives, satisfaction, and objectivity. These benefits can help pre-service teachers to focus on shortcomings regarding their teaching experiences, and take care for the correction. Further studies can be provided about the digital storytelling processes in various assessment processes of the instructions to reveal the potential of digital narratives in other domains as well.

Details

The International Journal of Information and Learning Technology, vol. 35 no. 3
Type: Research Article
ISSN: 2056-4880

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