01. Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed

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Citation - WoS: 1
Citation - Scopus: 1
A Simplified Approach for Site-Specific Design Spectrum
(2018) Tönük, Gökçe; Kurtuluş, Aslı; Ansal, Atilla; 02.04. Department of Civil Engineering; 02. Faculty of Engineering; 01. MEF University
The design acceleration spectrum requires site investigations and site-response analyses in accordance with the local seismic hazard. The variability in earthquake source and path effects may be considered using a large number of acceleration records compatible with the earthquake hazard. An important step is the selection and scaling of input acceleration records. Likewise, a large number of soil profiles need to be considered to account for the variability of site conditions. One option is to use Monte Carlo simulations with respect to layer thickness and shear wave velocity profiles to account for the variability of the site factors. The local seismic hazard analysis yields a uniform hazard acceleration spectrum on the bedrock outcrop. Site-specific response analyses also need to produce a uniform hazard acceleration spectrum on the ground surface. A simplified approach is proposed to define acceleration design spectrum on the ground surface that may be considered a uniform hazard spectrum.
A Time for Solidarity: Rethinking the Architectural Establishment in the Age of Covid-19
(Intellect, 2022) Yücel, Şebnem; 03.01. Department of Architecture; 03. Faculty of Arts Design and Architecture; 01. MEF University
...
Citation - WoS: 54
Citation - Scopus: 63
An Assessment of the Performance of Impedance Tube Method
(Institute of Noise Control Engineering, 2014) Hasan Körük; 02.03. Department of Mechanical Engineering; 02. Faculty of Engineering; 01. MEF University
The impedance tube method is widely used for measuring sound absorption (or reflection) coefficients of acoustic materials as a function of frequency. However, the sound absorption coefficients obtained using the impedance tube method may have some variations due to the dimensions (limits) of an impedance tube, sample preparation and sample mounting. This paper assesses the performance of the two-microphone impedance tube method as a function of frequency for different tube dimensions and materials and presents suggestions for increasing the reliability and repeatability of impedance tube measurements. First, after summarizing a systematic way for measuring acoustic transfer functions, sound absorption coefficients of a variety of materials ranging from conventional absorbing acoustic materials to samples with thin films are measured using two tubes with different tube diameter and microphone spacing. Uncertainty of sound absorption coefficients for various materials is discussed, and the frequency limits of impedance tubes are assessed. Then, a method for minimizing uncertainty due to sample mounting is proposed and the main findings are discussed.
An Overview on the Structural Monitoring, Assessment and Retrofitting of Historical Structures With a Focus on 13th Century Monuments
(Springer international Publishing Ag, 2024) Ilki, Alper; Inci, Pinar; Halici, Omer F.; Demir, Cem; Comert, Mustafa; Kuran, Fikret; 02.04. Department of Civil Engineering; 02. Faculty of Engineering; 01. MEF University
Monumental historical structures affirm natural and cultural identity and hence they should be transmitted to future generations. The protection and preservation of these structures against aging and natural hazards, particularly seismic actions, requires a comprehensive approach including diagnosis of the present condition of the structure and enhancement of structural capacity for disaster mitigation, if necessary. It is obvious that due to their historical values, any attempt towards the preservation of the monumental historical structures must be carried out with respect to the principles of integrity and authenticity. In this study, the structural performance assessment procedures, implementation of structural health monitoring systems and seismic strengthening strategies are discussed and described with reference to 13th-century monumental historical structures in Turkiye. The structural engineering aspects of recent activities for the restoration and preservation of the Great Mosque and Hospital of Divrigi (a world heritage listed structure) and Sivas Ulu Cami (Mosque) Minaret are briefly presented. In light of the structural analysis and monitoring results, recommendations for interventions to these monumental structures are outlined.
Citation - WoS: 1
Art Museums and the Middle East: a Contested Territory
(Intellect, 2020) Yücel, Şebnem; 03.01. Department of Architecture; 03. Faculty of Arts Design and Architecture; 01. MEF University
The Architectural Spotlight section addresses recent projects, debates and events that shape the architectural discourse and practice in Muslim-majority countries as well as in diasporic Muslim communities. In this section, contemporary architectural concerns in diverse cultural, economic, and social conditions are discussed to move toward the varied meanings of 'architecture'in recent geographies of Islam in its global dimensions.
Citation - WoS: 7
Citation - Scopus: 9
Attachment Insecurity and Restrictive Engulfment in College Student Relationships: the Mediating Role of Relationship Satisfaction
(Emerald Publishing Limited, 2018) Hatipoğlu Sümer, Zeynep; Murray, Christine; Toplu Demirtaş, Ezgi; 06.01. Department of Guidance and Psychological Counseling; 06. Faculty of Education; 01. MEF University
Purpose Studies on restrictive engulfment (RE) – a subtype of psychological aggression in intimate relationships – have focused either on insecure attachment or relationship satisfaction, not both. Therefore, the purpose of this paper is to investigate relationship satisfaction as a potential mediator of the associations between anxious and avoidant attachment and RE perpetration among college students. Design/methodology/approach A sample of 322 college students (178 women, 137 men, and seven other gender-identified) completed the experiences in close relationship inventory, relationship assessment scale, and RE subscale of the multidimensional measure of emotional abuse. Findings Among the sample, 89.3 and 90.5 percent of the college women and men, respectively, reported to have used isolating, restricting, monitoring, and controlling behaviors. The results of structural equation modeling revealed that all direct paths except for that from avoidant attachment to RE were significant. Moreover, significant indirect paths were identified from anxious and avoidant attachment to RE via relationship satisfaction. Research limitations/implications The results of this study should be interpreted with consideration of the study’s limitations. First, the data were drawn from a convenience sample of Turkish college students. Second, the design of the study is correlational; therefore, we cannot assume causality. Finally, this study utilized self-report and retrospective data. Practical implications Though the findings are preliminary, they may inform college counselors and other mental health practitioners about the nature of RE within college students’ dating relationships. College students who are unhappy with their dating relationships but still in those relationships (i.e. they choose not to leave) should be assessed for whether they are the perpetrators and/or recipients of psychological aggression, especially in light of the high rates of this form of aggression in the current and previous studies. Furthermore, assessing psychological dating aggression perpetrators for insecure attachment styles may help mental health professionals who work with college students, envisage the sessions toward areas in the need of improvement, such as their views of themselves and others. Self-esteem, feelings of insecurity and inadequacy in relationships, and dependency can be worked with these clients. Social implications The results of this study also have implications for the prevention of psychological aggression before it occurs. The need for prevention programs is evident in the high rates of psychologically controlling behaviors among college students. It may be useful to implement campus wide programs to raise awareness regarding psychological aggression, such as through events, seminars, posters, flyers, and talks with student groups. Originality/value Despite the limitations of this study, its findings offer insight into the factors that influence the perpetration of psychological aggression within dating relationships among college students. Adult attachment theory offers a useful lens for understanding the possible driving forces behind college students’ controlling behaviors toward their dating partners. In particular, college students who demonstrate an insecure attachment style – and especially an anxious attachment style – combined with low levels of relationship satisfaction appear to be at a high risk for perpetrating RE behaviors.
Belgeselin Merceğinden Hapishanelerdeki Ölüm Siyaseti
(Turkish Medical Association, 2023) Özen Barkot, Z.; 01. MEF University
The prison is a space where the biopower most clearly prove itself. Prisons, as a mechanism that legitimizes and implements the standards of modern power on life processes, are places that determine “disposable lives” politically, socially, and culturally and make individuals open to death, by containing the disciplinary and coercive techniques that subjugate bodies. Thus, prisons are the most obvious manifestations of the power that authorizes itself over life and death and defines itself concerning the biological field under its control, potentially working together with necropolitics. Moreover, this process is constructed not only by the physical or concrete operation of power but also by narratives that give form and content to the sovereign. At this point, this article deals with the possibility of documentary films have an important function on truth and justice from a human rights perspective by deciphering the sovereign’s narrative. Specifically, the question of how necropolitics organizes itself in prison will be discussed in the scope of Errol Morris’s film entitled Standard Operating Procedure (2008), in which he reveals the systematic dehumanization and torture in Abu Ghraib Prison by referring to the narratives of the perpetrators. © 2023, Turkish Medical Association. All rights reserved.
Citation - WoS: 12
Citation - Scopus: 12
Bilevel Models on the Competitive Facility Location Problem
(Springer, 2017) Küçükaydın, Hande; Aras, Necati; 02.01. Department of Industrial Engineering; 02. Faculty of Engineering; 01. MEF University
Facility location and allocation problems have been a major area of research for decades, which has led to a vast and still growing literature. Although there are many variants of these problems, there exist two common features: finding the best locations for one or more facilities and allocating demand points to these facilities. A considerable number of studies assume a monopolistic viewpoint and formulate a mathematical model to optimize an objective function of a single decision maker. In contrast, competitive facility location (CFL) problem is based on the premise that there exist competition in the market among different firms. When one of the competing firms acts as the leader and the other firm, called the follower, reacts to the decision of the leader, a sequential-entry CFL problem is obtained, which gives rise to a Stackelberg type of game between two players. A successful and widely applied framework to formulate this type of CFL problems is bilevel programming (BP). In this chapter, the literature on BP models for CFL problems is reviewed, existing works are categorized with respect to defined criteria, and information is provided for each work.
Citation - Scopus: 2
Breast Lesion Detection From Dce-Mri Using Yolov7
(American Institute of Physics, 2024) Şahin,Sinan; Araz, Nusret; Bakırman, Tolga; Çakar, Tuna; Kulavuz, Bahadır; Bayram, Bülent; Çavuşoğlu, Mustafa; 02.02. Department of Computer Engineering; 02. Faculty of Engineering; 01. MEF University
Breast cancer is one of the most common types of cancer among women. Early diagnosis of breast cancer has vital importance to prevent unexpected losses. A worldwide effort has been made to tackle early detection challenge. Dynamic contrast-enhanced magnetic resonance imaging is a superior imaging system that improves breast cancer diagnosis quality of physicians. Computer Aided Diagnosis systems are used as a complementary tool to improve breast cancer diagnosis. In last decades, various computer aided diagnosis systems have been proposed. However, the state-of-the-art deep learning-based approaches have started to overcome conventional medical image processing methods. In this study, we aimed to detect malignant breast lesions from open access dynamic contrast-enhanced magnetic resonance imagery dataset using most recent YOLOv7 deep learning architecture. 2400 images have been used for training (80%) and testing (20%) of the network. The metrics calculated with the test dataset are 98.54%, 96.42% and 84.40% for mAP@0.50 IoU, mAP@0.75 IoU and mAP, respectively. The results show that YOLOv7 architecture is capable to detect malignant breast lesions from dynamic contrast-enhanced magnetic resonance images efficiently. © 2024 Author(s).
Citation - WoS: 1
Citation - Scopus: 1
Building a Community Through a Design Build Studio Program
(Springer international Publishing Ag, 2025) Inceoglu, Arda; 01. MEF University
This paper aims to provide a comprehensive and critical assessment of the outcomes stemming from a Design-Build program, a pedagogical approach widely adopted by educational institutions worldwide. These programs are instrumental in equipping students with vital practical skills, often unattainable within the confines of a conventional studio environment. While the objectives of this program align with those of similar initiatives in various educational institutions, an examination reveals an unexpected and substantial outcome. Beyond its primary goals, the Design-Build program has played an integral role in instilling a culture of collaboration and camaraderie within the school, thereby significantly contributing to the overall success of its architectural education. All stages of the program consist of collaborative processes, instilling from an early age the importance of working together by helping each other than individual competition.
Citation - WoS: 2
Commemorations of Sinan: Creating a National Hero in Turkey in the 1930s
(Intellect, 2023) Sezgin, Ahmet; 03.02. Department of Interior Design; 03. Faculty of Arts Design and Architecture; 01. MEF University
Sinan (d.1588) is the most renowned architect of the Ottoman Empire. His buildings, located throughout the eastern Mediterranean, were central to a dynastic and religious architectural heritage that was inherited by a modern and secular Turkish nation state, established in 1923. This article examines how Sinan was refashioned as a national hero in the early decades of the Republic. It focuses on commemorations of Sinan and their major venue: his Süleymaniye Mosque in Istanbul. In my analysis of these commemorations, I draw on a wide and diverse array of primary source materials, including written, photographic, artistic, and other visual materials from the 1930s and 1940s that are located in official, semi-official, and other collections. By doing so, this article reveals how the variety of nationalist approaches to Sinan and his architecture coexisted and competed.
Citation - WoS: 1
Citation - Scopus: 2
Compaction and Shear Strength Behavior of Fresh and Aged Basic Oxygen Furnace (bof) Steel Slag
(2016) Yıldırım, İrem Zeynep; Prezzi, Monica; 02.04. Department of Civil Engineering; 02. Faculty of Engineering; 01. MEF University
Use of industrial by-products in geotechnical engineering projects, such as in the construction of highway embankments, is advantageous because large volumes of these materials can be utilized. Basic oxygen furnace (BOF) steel slag is one of these industrial by-products. This paper provides a brief background on the characteristics of BOF steel slag and presents the results of a series of laboratory tests (grain-size analysis, maximum and minimum dry density, compaction, large-scale direct shear tests (LDS) and isotropically consolidated-drained triaxial compression (CID TX) performed on fresh and aged BOF steel slag generated from an Indiana steel plant. BOF steel slag samples from three different batches of production were tested, which allowed an evaluation of both aging processes and the effect of changes in gradation on the mechanical properties. The BOF steel slag tested in this study contained sand-size particles with varying percentages of gravel-and silt-size fractions. The moisture-density relationships for BOF steel slag were irregular with two peaks. Based on the LDS and CID TX test results, the BOF steel slag exhibited superior strength and stiffness characteristics than conventional geo-materials. The mechanical properties of fresh and aged BOF steel slag are discussed in the context of its use in geotechnical applications.
Contesting Labels: Revisiting Old Questionnaires
(Cambridge University Press, 2020) Ada, Serhan; Yücel, Şebnem; 03.01. Department of Architecture; 03. Faculty of Arts Design and Architecture; 01. MEF University
As a response to several questionnaires, manifestos, interviews, and letters that were included in the book Modern Art in the Arab World: Primary Documents, this article carries out a new questionnaire with seven artists form various backgrounds and geographies, in an attempt to update and re-question some of the issues that were highlighted in the collected essays. The questionnaire includes three questions, each focusing on a different issue. The first issue considers the validity of the term “Arab Art,” the second tries to identify the main dynamics of contemporary artistic production, and the last one questions the relation of contemporary production of arts to geography and history. The following interviews have been edited for consistency and clarity.
Citation - Scopus: 9
Data From an International Multi-Centre Study of Statistics and Mathematics Anxieties and Related Variables in University Students (the Smarvus Dataset)
(Web Portal Ubiquity Press, 2023) Sarfo, Jacob O.; Şen, Hilal Harma; Nagy, Tamás; Garrido-Vásquez, Patricia; Ross, Robert M.; Salgado, Mauricio; Terry, Jenny; 04.02. Department of Psychology; 04. Faculty of Economics, Administrative and Social Sciences; 01. MEF University
This large, international dataset contains survey responses from N = 12,570 students from 100 universities in 35 countries, collected in 21 languages. We measured anxieties (statistics, mathematics, test, trait, social interaction, performance, creativity, intolerance of uncertainty, and fear of negative evaluation), self-efficacy, persistence, and the cognitive reflection test, and collected demographics, previous mathematics grades, self-reported and official statistics grades, and statistics module details. Data reuse potential is broad, including testing links between anxieties and statistics/mathematics education factors, and examining instruments’ psychometric properties across different languages and contexts.
Determination of Alzheimer's Disease Stages by Artificial Learning Algorithms
(Lifescience Global, 2025) Bulut, Nurgül; Çakar, Tuna; Arslan, İlker; Akıncı, Zeynep Karaoğlu; Oner, Kevser Setenay
Introduction: This study aims to determine the stages of Alzheimer's disease (AD) using different machine learning algorithms, and compares the performance of these models. Methods: Demographic, genetic, and neurocognitive inventory data from the National Alzheimer's Coordinating Center (NACC) database as well as brain volume/thickness data from magnetic resonance imaging (MRI) scans were used. Deep Neural Networks, Ordinal Logistic Regression, Random Forest, Gaussian Naive Bayes, XGBoost, and LightGBM models were used to identify four different ordinal stages of AD. Results: Although the performance measures of the developed models were similar, the highest classification rate of AD stages was achieved by the Random Forest model (accuracy: 0.86; F1 score: 0.86; AUC: 0.95). The outputs of the model with the best performance were explained by the SHapley Addictive exPlanations (SHAP) method. Conclusions: This indicates that non-invasive markers and machine learning models can be used effectively in early diagnosis and decision support systems to predict stages of AD. © 2025 Elsevier B.V., All rights reserved.
Die Naturrechtsrenaissance in Deutschland nach 1945 in ihrem Historischen Kontext - Mehr als nur eine Rechtsphilosophische Randnotiz?
(2013) Arndt Künnecke; 04.04. Department of Political Science and International Relations; 04. Faculty of Economics, Administrative and Social Sciences; 01. MEF University
…
Drawing the Line: on the Impossibility of Utopia
(Intellect Ltd, 2024) Yücel, Şebnem; 03.01. Department of Architecture; 03. Faculty of Arts Design and Architecture; 01. MEF University
When Dutch artist Joep van Lieshout ventured into developing a zero -carbon, no -waste city in 2005, there were no such examples in the world. His artistic vision, complete with a full set of drawings and models, predated any real attempts to build one.1 Van Lieshout, a controversial artist known for his independent state in Rotterdam harbour (AVL-Ville), has 'dissected systems' in his work, be they systems of society or of the human body.2 While dissecting systems, he has often turned to design and architecture, creating provocative work that blurs the line between reality and fantasy.3 His 2005 zero -carbon city project was no exception.4 Van Lieshout's city was a compact one, covering approximately fifty square kilometres. With a set of calculations, models, drawings, paintings, and even objects, the project was complete. A business plan that accompanied the design outlined a program to maintain the city's profitability, an annual profit of 7.5 billion Euro to be exact.5 The project's description referenced some of the important keywords for urban design today, including zero -carbon design, efficiency, and profitability, ultimately suggesting a responsible, ethical, and a desired future. This was not exactly the case, however. This was - as he labelled it - a 'Slave City'. As the name suggests, Van Lieshout's Slave City would be populated by worker slaves who would be divided into four categories:6 healthy and suitable for work (6 per cent of the population), healthy and unsuitable for work (16 per cent), unhealthy and unsuitable for work (29 per cent) and the majority, unhealthy, unsuitable for work, and tasteless (49 per cent).7 Based on these
Citation - WoS: 2
Citation - Scopus: 1
Eaf Ladle Steel Slag as a Geo-Material: Compaction and Shear Strength Characteristics
(2018) Yıldırım, İrem Zeynep; Prezzi, Monica; 02.04. Department of Civil Engineering; 02. Faculty of Engineering; 01. MEF University
The numerous issues associated with the excess steel slag that is disposed of in landfills every year can be reduced by using it as a geo-material. This paper provides the results of laboratory tests (i.e., sieve, hydrometer, specific gravity, compaction, compaction-particle degradation, and large-scale direct shear with a box size of 30.5 x 30.5 x 20 cm) performed on electric-arc-furnace ladle [EAF(L)] steel slag from a mini-mill in Indiana. Based on standard proctor test results, the maximum dry unit weight values of the EAF(L) steel slag were in the 16.8-to-20 kN/m(3) range at the optimum moisture contents of 11-13%. The results of the large-scale direct shear tests performed on EAF(L) steel slag, compacted at 95-100% relative compaction and sheared with normal stress ranging from 50 to 300 kPa, showed that it has excellent frictional characteristics, with friction angles between 40 and 45 degrees. Based on the results from this study, due to its shear strength characteristics, EAF(L) steel slag has the potential to be utilized as a geo-material to improve the shear strength of various marginal soils.
Effect of Boron Addition to Steel on Mechanical Properties
(Springer Science and Business Media Deutschland GmbH, 2025) Özmen, Levent; Cakici, Mehmet; Yucel, Onuralp; 01. MEF University
In the production of qualified steel, if 5–30 ppm boron is present in the product, the hardenability of the steel increases significantly by the case hardening process. This small amount of boron content reduces the austenite grain size (by preventing grain growth) and increases the matrix hardness through the precipitates formed.With the addition of boron, it is possible to obtain the desired hardness depth due to the cementation applied especially in gear parts. This result obtained in boron steels is similar to Cr, Mn, Mo, Ni, etc., which are used in conditions where boron is not used. In other words, the use of boron as a microalloying element also provides cost savings. In this study, the parameters affecting the hardenability of steel by boron addition amounts in steel production using ferroboron were investigated on the basis of chemical content, metallographic structure, and mechanical properties. © The Minerals, Metals & Materials Society 2025.
Citation - WoS: 9
Citation - Scopus: 12
Elevated White Blood Cell Levels and Thrombotic Events in Patients With Polycythemia Vera: a Real-World Analysis of Veterans Health Administration Data
(Elsevier Inc., 2019) Wang, Li; Parasuraman, Shreekant V.; Sulena Shrestha; Paranagama, Dilan C.; Yu, Jingbo; Scherber, Robyn Marie; Başer, Onur; 04. Faculty of Economics, Administrative and Social Sciences; 01. MEF University
Background: Patients with polycythemia vera (PV) have a substantial risk of thrombotic events (TEs). The objective of the present analysis was to describe the association between white blood cell (WBC) levels and occurrence of TEs among patients with PV from a large real-world population. Patients and Methods: The present retrospective analysis using Veterans Health Administration claims data (October 1, 2005, to September 30, 2012) evaluated adult patients assigned to 4 WBC count categories (WBC count < 7.0, 7.0-8.4, 8.5 to < 11.0, and ≥ 11.0 × 109/L) to compare the risk of TEs (reference, WBC count, < 7.0 × 109/L group). Analysis was performed using a Cox proportional hazards model, considering WBC status as a time-dependent covariate. Results: Of the 1565 patients with PV included in the present analysis, the WBC count was < 7.0 × 109/L for 428 (27.3%), 7.0 to 8.4 × 109/L for 375 (24.0%), 8.5 to < 11.0 × 109/L for 284 (18.1%), and ≥ 11.0 × 109/L for 478 (30.5%). Of the 1565 patients, 390 (24.9%) had experienced a TE during the study period. The mean follow-up ranged from 3.6 to 4.5 years. Compared with the reference group (WBC count < 7.0 ×109/L), the hazard ratio for TEs was 1.10 (95% confidence interval [CI], 0.82-1.48; P = .5395), 1.47 (95% CI, 1.10-1.96; P = .0097), and 1.87 (95% CI, 1.44-2.43; P < .0001) for patients with a WBC count of 7.0 to 8.4, 8.5 to < 11.0, and ≥ 11.0 ×109/L, respectively. Conclusion: A positive, significant association between an increased WBC count of ≥ 8.5 ×109/L and the occurrence of TEs was observed in patients with PV. The potential thrombogenic role of WBCs in patients with PV supports the continued inclusion of WBC count control in disease management and evaluation of the response to therapy. © 2019 The AuthorsPatients with polycythemia vera (PV) have a substantial risk of thrombotic events (TEs). In the present retrospective analysis using Veterans Health Administration claims data, 25% of 1565 patients experienced a TE during follow-up. We observed a positive, significant association between white blood cell (WBC) counts ≥ 8.5 × 109/L and TE occurrence (reference, WBC count < 7.0 × 109/L), supporting continued inclusion of WBC count control in disease management. © 2019 The Authors

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