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Article
Publication date: 13 May 2024

Ahmet Turgut and Begum Korunur Engiz

Currently, massive multiple-input multiple-output (m-MIMO) antennas are typically designed using complex trial-and-error methods. The purpose of this study is to determine an…

Abstract

Purpose

Currently, massive multiple-input multiple-output (m-MIMO) antennas are typically designed using complex trial-and-error methods. The purpose of this study is to determine an effective optimization method to achieve more efficient antenna design processes.

Design/methodology/approach

This paper presents the design stages of a m-MIMO antenna array compatible with 5G smartphones operating in long term evolution (LTE) bands 42, 43 and 46, based on a specific algorithm. Each antenna element in the designed 10-port m-MIMO antenna array is intended to perfectly cover the three specified LTE bands. The optimization methods used for this purpose include the Nelder–Mead simplex algorithm, covariance matrix adaptation evolution strategy, particle swarm optimization and trust region framework (TRF).

Findings

Among the primary optimization algorithms, the TRF algorithm met the defined objectives most effectively. The achieved antenna efficiency values exceeded 60.81% in the low band and 68.39% in the high band, along with perfect coverage of the desired bands, demonstrating the success of the design with the TRF algorithm. In addition, the potential electromagnetic field exposure caused by the designed m-MIMO antenna array is elaborated upon in detail using computational human models through specific absorption rate analysis.

Originality/value

The comparison of four different algorithms (two local and two global) for use in the design of a 10-element m-MIMO antenna array with a complex structural configuration and the success of the design implemented with the selected algorithm distinguish this study from others.

Details

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

Keywords

Article
Publication date: 30 March 2010

Hüseyin Koçak, Turgut Öziş and Ahmet Yıldırım

This paper aims to apply He's homotopy perturbation method (HPM) to obtain solitary solutions for the nonlinear dispersive equations with fractional time derivatives.

Abstract

Purpose

This paper aims to apply He's homotopy perturbation method (HPM) to obtain solitary solutions for the nonlinear dispersive equations with fractional time derivatives.

Design/methodology/approach

The authors choose as an example the nonlinear dispersive and equations with fractional time derivatives to illustrate the validity and the advantages of the proposed method.

Findings

The paper extends the application of the HPM to obtain analytic and approximate solutions to the nonlinear dispersive equations with fractional time derivatives.

Originality/value

This paper extends the HPM to the equation with fractional time derivative.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 20 no. 2
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 8 November 2011

Banu Tuğba Turğut, Gamze Taş, Ahmet Herekoğlu, Hakan Tozan and Ozalp Vayvay

The purpose of this paper is to propose a disaster logistics center location selection decision support system, based on analytic hierarchy/fuzzy analytic hierarchy process…

2283

Abstract

Purpose

The purpose of this paper is to propose a disaster logistics center location selection decision support system, based on analytic hierarchy/fuzzy analytic hierarchy process methods, which will serve to fulfill the needs of disaster victims and rescue teams after a possible earthquake, and to implement the proposed systems for Istanbul.

Design/methodology/approach

Determining the appropriate location from among the possibilities by taking many sophisticated and inter‐related processes and parameters into consideration under stringent constraints is one of the keystones of logistics. Disaster logistics center location selections are extremely complex and vital. In this paper, analytic hierarchy/fuzzy analytic hierarchy process methods are used to compose a decision support system for determining the location of disaster logistics centers. The criteria and the weighting for the criteria that are used are determined via a questionnaire technique applied to specialists working in the Istanbul Center of Disaster Coordination.

Findings

Results gathered from the implementation of the proposed models to the chosen case illustrate that systems successfully determine the location, and both models point out the same result with different weights.

Originality/value

The paper introduces two disaster logistics center location selection decision support systems (fuzzy and crisp) and presents an empirical case study of the proposed models for Istanbul. The proposed model and outcomes from the application may shed light on future work, especially in the field of disaster logistics management.

Details

Disaster Prevention and Management: An International Journal, vol. 20 no. 5
Type: Research Article
ISSN: 0965-3562

Keywords

Article
Publication date: 23 March 2023

Ahmet Meti Tmava and Sara Ryza

The number of open access repositories (OARs) has been growing globally, but faculty members have been reluctant to embrace OAR and submit their work. While there are studies that…

Abstract

Purpose

The number of open access repositories (OARs) has been growing globally, but faculty members have been reluctant to embrace OAR and submit their work. While there are studies that looked at sociotechnical factors that affect faculty participation in OARs, this study aims to explore how the individual characteristics of faculty might impact faculty willingness to deposit their work in an OAR.

Design/methodology/approach

The survey was distributed to all faculty at a large public university in the USA who were identified as having their primary job responsibilities in teaching and research. This study used a correlational analysis between faculty individual characteristics (i.e. age, rank, status and academic discipline) and their willingness to deposit their work.

Findings

The findings show that there is a difference in faculty familiarity with open access (OA) principles and faculty awareness of OA policy based on individual characteristics. Furthermore, these individual characteristics have a significant impact on faculty willingness to participate in OARs. While this study reveals a significant correlation between the faculty intent to deposit and the respondent’s academic discipline, rank and status, there are other factors that affect faculty intent to participate in OAR, such as familiarity with OA principles and awareness of institution’s OA Policy.

Research limitations/implications

There were no significant responses from the Colleges of Science or Health and Public Service and, therefore, did not yield any statistically significant results. Measuring the university’s promotion system was outside the scope of this research.

Practical implications

Results of this research can provide insight on how individual characteristics of faculty might impact their willingness to embrace OA publishing in general and OARs in particular.

Social implications

The findings from this research will be a valuable source of information for librarians and OA staff in developing more effective outreach programs to increase faculty participation in OA and OARs.

Originality/value

This study reveals that individual faculty traits do have an impact on faculty willingness to participate in OARs. The academic discipline was found to make the most significant difference in faculty intent to deposit their work in an OAR. However, due to the ever-changing landscape of OA publishing and the ongoing outreach efforts by librarians, the faculty members’ perception and participation in OARs is likely to evolve.

Details

Digital Library Perspectives, vol. 39 no. 3
Type: Research Article
ISSN: 2059-5816

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 doctoral…

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

Content available
Book part
Publication date: 30 July 2018

Abstract

Details

Marketing Management in Turkey
Type: Book
ISBN: 978-1-78714-558-0

Book part
Publication date: 30 November 2020

Ali Akbulut and Gökçen Firdevs Yücel Caymaz

Today, the presence of unwanted activities threatening the safety of the field, which has negative effects on daily life and social psychology, is increasing day by day. There is…

Abstract

Today, the presence of unwanted activities threatening the safety of the field, which has negative effects on daily life and social psychology, is increasing day by day. There is no doubt that it is inevitable to avoid these threats, but it is possible to take some measures to reduce the destructive power of these threats. Nowadays, increasing terrorist attacks increase the importance of field safety design in urban areas. There is a loss of life in attacks around the world. The subject of this study is to investigate the design criteria related to the built environment and the measures to be taken in the case of bomb attacks in the built environment. In this study, a checklist will designed to measure the security design process around the building. The checklist titles are taken mainly from the “Safety design and Landscape Architecture” series of the Landscape Architecture Technical Information Series/LATIS publications by the American Society of Landscape Architects (ASLA) and the Risk Management Series of the Federal Emergency Management Agency/FEMA (FEMA, 2003, 2007; LATIS, 2016) and others. The checklist created as a result of literature review will be tested in Istanbul Sultanahmet Square. As a result of the study, it was determined that improvements should be made in the areas of vehicular and pedestrian access, parking lots, lighting and trash receptacle designs around Sultanahmet Square.

Details

International Case Studies in the Management of Disasters
Type: Book
ISBN: 978-1-83982-187-5

Keywords

Article
Publication date: 13 June 2016

Volkan Yeniaras

The purpose of the study is to investigate how religiosity affects these relationships in Turkey where consumption is de-stigmatized among a new economic elite with strong ties to…

1254

Abstract

Purpose

The purpose of the study is to investigate how religiosity affects these relationships in Turkey where consumption is de-stigmatized among a new economic elite with strong ties to Islamism. The literature commonly associates religion and ideology with anti-capitalism and anti-consumption. Although consumer researchers have studied both topics, examination of whether materialistic values translate into status consumption and whether religiosity has an effect on the relationship between status consumption and consumer attitude to debt remains scant.

Design/methodology/approach

This paper investigates the relationship of materialism to status consumption and the mediating role of Islamic religiosity on the relationship between status consumption and attitude to debt. Structural equations modeling was used on a judgmental sample of 267.

Findings

The results showed that the materialistic values positively affect status consumption for the Islamists. This paper concludes that Islamic religiosity, not only does not reject consumption but also augments the relationship between status consumption and consumer attitude to debt.

Originality/value

The findings have shown that previous studies that identify Islam as a threat to consumerism have overseen the class struggles and the role of status consumption. This paper successfully provided empirical evidence that the religiosity not only does not reject consuming but intensifies the relationship between status consumption and attitude to debt for those with Islamist dispositions.

Details

Journal of Islamic Marketing, vol. 7 no. 2
Type: Research Article
ISSN: 1759-0833

Keywords

Article
Publication date: 28 August 2019

Kerem Gabriel Öktem and Cansu Erdogan

Over the last four decades, Turkey has built an elaborate social assistance regime, which provides extensive coverage of the poor but lacks some of the key characteristics of…

Abstract

Purpose

Over the last four decades, Turkey has built an elaborate social assistance regime, which provides extensive coverage of the poor but lacks some of the key characteristics of European minimum income protection systems. The purpose of this paper is to explore what ideational roots underlie the regime and how these ideas and paradigms historically shaped the structure of the regime. The paper focuses on two central social assistance legislations: the social pensions law of 1976 and the Law that established the Fund for the Encouragement of Social Cooperation and Solidarity in 1986.

Design/methodology/approach

Based on a discursive institutionalist approach, the paper combines a qualitative content analysis of parliamentary debates and official reports with a policy analysis of social assistance legislations in Turkey.

Findings

The paper shows that two competing policy paradigms shaped the ambivalent structure and design of Turkey social assistance regime: a welfare state paradigm and a state-organised charity paradigm. The welfare state paradigm, which perceives social assistance as a social right, was dominant in the 1970s and is embodied in the social pension programme. The state-organised charity paradigm, which aims to reinvigorate the Islamic tradition of charitable foundations (waqf), was dominant in the 1980s and is embodied in the Fund for the Encouragement of Social Cooperation and Solidarity. Today’s social assistance regime combines both elements in a curious synthesis.

Originality/value

The paper contributes to comparative social policy research and discursive institutionalism by uncovering the historical and ideational foundations of a largely neglected case, social assistance in Turkey.

Details

International Journal of Sociology and Social Policy, vol. 40 no. 3/4
Type: Research Article
ISSN: 0144-333X

Keywords

Expert briefing
Publication date: 19 March 2015

Internal party democracy.

Details

DOI: 10.1108/OXAN-DB198338

ISSN: 2633-304X

Keywords

Geographic
Topical
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