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

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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.
Impact of Introducing Semi-Rigid Moment Frames on Seismic Response of Braced Frames
(2019 ISEC Press, 2019) Shen, Jay; Akbaş, Bülent; Şeker, Onur; Faytarouni, Mahmoud
Maximum seismic inelastic drift demand in a steel building with braced frames as primary seismic-force-resisting (SFR) system tends to concentrate in few stories without considering inherent participation of designed gravity-force-resisting (GFR) system in actual structural stiffness and strength. The influence of GFR system on stiffness and strength can be taken into account by considering the composite action in beam-to-column shear connections that exist in modern steel building construction to form actual semi-rigid moment-resisting frames. Therefore, modeling semi-rigid moment frames as an equivalent to the GFR system in braced frame buildings could be utilized as a representative to the strength provided by gravity frames. This paper presents a seismic evaluation of a six-story chevron braced frame, with and without semi-rigid moment frame. Four different cases are investigated under a set of ground motions and results are discussed in terms of story drift distribution along the height. The results pointed out that the current findings lay a foundation to conduct further investigation on the seismic performance of braced frames as designed SFR system together with GFR system.
Citation - WoS: 1
'Improve the Law' as a Judicial Duty on the Borderlines of Free Speech: Judges as Responsible Epistemic Agents3
(Kozminski Univ, 2022) Uygur, Gulriz; Guergey, Fatma Irem Caglar
This paper discusses judicial duty of improving the law on epistemic grounds and claims in that regarding this obligation, it is possible to give a place to free speech from an epistemic point of view. As a requirement of having epistemic agency, judges like other human beings have epistemological responsibility. Different from the others' responsibility, judges' responsibility is connected to their duty of improving the law, which is required by their job as well as the idea of the rule of law and judicial professional principles. Judges should improve the law's capacity to guide the conduct of its citizens, who are obligated to obey the law. Improving the law also improves the delivery of justice. The ways of legal interpretation and justification are important to improve it. While applying the law, judges can find the law unclear or they may encounter some norm conflicts. In these cases, they should resolve them to keep the law 'legally in good shape', which should meet epistemological requirements. When fulfilling this obligation, judicial free speech on epistemic grounds should not be limited.
Contesting Labels: Revisiting Old Questionnaires
(Cambridge University Press, 2020) Ada, Serhan; Yücel, Şebnem
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 - WoS: 1
Citation - Scopus: 1
Fuzzy Elephant Herding Optimization and DBSCAN for Emergency Transportation: A Case Study for the 2023Turkiye Earthquake
(Springer international Publishing Ag, 2024) Drias, Yassine; Drias, Habiba
In recent times, our planet has experienced numerous natural disasters across all continents. The damage caused by these disasters has been so extensive that Emergency Medical Services (EMS) proved incapable of handling the situation. In this article, we present a novel approach for urgent disaster transport with the aim of minimizing loss of life. In this context, we are investigating the Density-Based Spatial Clustering of Applications with Noise algorithm (DBSCAN) to cluster the large geographic zone affected by the 2023 earthquake in Turkiye. The clustering is done based on hospitals' capacity on one hand and damages on the other hand. The ambulance dispatching task is then tackled using a new fuzzy version of Elephant Herding Optimization called FEHO. This approach addresses the challenge of dispatching ambulances to cover emergency locations effectively and optimally in the clustered regions. Experiments conducted on real data demonstrate the effectiveness of our approach in managing emergency transportation and highlight its potential to minimize the number of casualties.
Citation - WoS: 5
Citation - Scopus: 5
State of the Art in Application of Seismic Isolation and Energy Dissipation in Turkey
(Springer International Publishing Ag, 2023) Şadan, Bahadır
This paper summarizes the passive structural control system applications and other related developments in Turkey, emphasizing the period between 2019 and 2022. The country hosts state-of-the-art seismic isolation applications, relatively greater in size, and use more isolators in each project (415 isolators per building on average) compared to the other seismic isolation projects worldwide. Construction of the world's largest seismic isolated building, Istanbul Basaksehir Pine and Sakura City Hospital, covering more than 1 million square meters of area and employing more than 2000 seismic isolators, was completed and has been in service since May 2020. 1915 Canakkale Bridge, constructed in memory of the great war of Canakkale during World War I, is now the world's longest suspension bridge with a 2023m main span length. Eight massive hydraulic dampers were used at the main deck and 48 at the approach viaducts in combination with 72 seismic isolators. Construction of a residential building complex in Istanbul consisting of 16 isolated blocks covering more than 170,000 m(2) area and having 454 seismic isolators is coming to an end very soon. Historical Nusretiye Clock Tower in Istanbul was relocated a few meters over seismic isolators. Historical Goztepe Railway Station in Istanbul was retrofitted to accommodate an additional railway line using seismic isolation technology. Seismic codes for buildings and bridges now include rules for the seismically isolated design of structures. Additionally, all seismic isolation designs must be peer-reviewed by law. A new seismic isolator testing facility was established in Eskisehir to respond to the demand for the large number of isolators that need to be tested.
Citation - Scopus: 1
Toward a Novel Neuroscience-Based System Approach Integrating Cognitive and Implicit Learning in Education
(Springer Science and Business Media Deutschland GmbH, 2023) Tsvetkova, Nadezhda; Çakar, Tuna; Veledinskaya, Svetlana; Babanskaya, Olesya; Dorantes-Gonzalez, Dante Jorge
Emotional-enhanced learning is a meaningful driver of engagement leading to long-term memory retention in learners, however, traditional approaches such as problem-based learning, and project-based learning, among others, do not consider brain-based learning guidelines concerning learner’s emotional experience design. The Neuroscience-based Learning (NBL) technique is a novel neuro-educational approach that applies the implicit neuro-physiological mechanisms underlying vivid and highly-arousal emotion-al experiences leading to long-term memory retention. The NBL is devised from a cybernetic system point of view, by explaining the novel neuro-physiological learning scheme describing the relation among the environment and the learner’s internal mental processes ranging from perceptions, comparison with previous experiences and memories, immediate sensations and reactions, emotions, desires, intentions, higher order cognitive functions, and controlled actions towards the environment. While explaining biological processes, the scheme also relates the types of memory systems with their non-associative and associative learning mechanisms, and the variables that modulate learning. NBL proposes the triggers for a vivid and highly-arousal emotional learning, which are novelty, unpredictability, sense of low control, threat to ego, avoidance (aversion-mediated learning), and reward (reward-based learning). © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
Seismic Evaluation of Square Hss Braces in Scbf Using Regression Analysis
(ISEC Press, 2019) Shen, Jay; Akbaş, Bülent; Şeker, Onur; Faytarouni, Mahmoud
Since the 1990s, structural engineering practice geared toward the use of hollow structural sections (HSS), notably square HSS, for their economy, and ease of design and construction. According to the AISC Seismic Provisions, during a severe earthquake, these braces could undergo post-buckling axial deformations 10 to 20 times their yielding deformation. However, recent experimental studies indicate that braces made of square HSS, depending on their size, width-to-thickness, and slenderness ratio, are vulnerable to fracture even prior to 10. Therefore, relying on past experimental studies comprised of a few square HSS specimens to develop seismic requirements for SCBF with square HSS could lead to underestimation of the seismic risk. This paper aims to evaluate the fracture risk of braces in existing SCBFs designed in accordance with AISC 341-05 and AISC 341-16 through incremental dynamic analyses (IDA) along with experimentally developed regression model that estimates fracture.
Citation - WoS: 13
Quantifying the Grounding Probability in Narrow Waterways
(CRC Press, 2020) Özlem, Ş.; Altan, Y.C.; Otay, E.N.; Or, I.
The aim of this paper is to estimate the grounding probability of vessels while navigating in narrowwaterways. In this study, the grounding probability is modelled as a combination the geometric probability, defined as vessel being on a grounding course and the causation probability, defined as the probability that the vessel is unable to avoid a grounding while being on a grounding course. A mathematical model is developed to estimate the geometric probability where the causation probability is estimated through a specially designed Bayesian network. The Strait of Istanbul, one of the narrowest waterways in the world, is used as a test case. The resulting grounding and ramming accidents are 2.8 times the ship collisions. The most critical causes of grounding accidents are the machine failure, steering inadequacy and lack of pilot support, respectively. With different input parameters, the proposed approach may be applied to other narrow waterways. © 2020 Taylor and Francis Group, London.
Citation - WoS: 3
Citation - Scopus: 5
Why "sway" Again? Prosodic Constraints and Singability in Song (re)translation
(Springer, 2019) Güven, Mine
This study focuses on the song ?Quien sera? (1953, lyrics by Pablo Beltran Ruiz and music by Pablo Beltran Ruiz and Luis Demetrio Traconis Molina), which has had many language versions so far (e.g. Arabic, Finnish, French, German, Icelandic, Italian, Japanese, Mandarin, Russian, etc.), including the English Sway (1954, lyrics by Norman Gimbel), which is often erroneously thought to be the original. The lyrics have also been rewritten in Turkish by Fecri Ebcioglu in 1968/1987, Yesil Giresunlu in 1977, and Athena in 2000. With particular reference to Johan Franzon's analysis of song translation, the present article analyzes the Turkish versions in an attempt to investigate the possible constraints behind the decisions taken by the various agents of the cultural import. Given that a translated version of a source song is expected to reproduce the music and/or the lyrics and/or the sung performance, the Turkish versions appear to be adaptations with rewritten lyrics, which enable a reproduction of the melody and a sung performance similar to that of the source song. The data analysis further suggests that prosodic constraints rank the highest among the layers of singability and that translators' attitude towards the literary quality of the original lyrics might influence their decision to adopt assimilating strategies or not.
Citation - WoS: 1
Citation - Scopus: 1
A Simplified Approach for Site-Specific Design Spectrum
(2018) Tönük, Gökçe; Kurtuluş, Aslı; Ansal, Atilla
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.
Türkiye'de Yükseköğrenim Finansmanının Özelleştirilmesi
(Sosyoekonomi Society, 2018) Son-Turan, Semen
This study aims at developing a model for the privatization of higher education finance inTurkey. While the primary target is the NEET (Not in Education, Employment, or Training)population, it offers a broad range of potential solutions involving asset securitization for highereducation financing. Data is driven from secondary sources. The paper presents an interdisciplinaryapproach for privatizing higher education finance involving the labor market, higher educationinstitutions and the Turkish capital market and constitutes a unique contribution to the Turkish highereducation finance literature.
The Role of Artificial Intelligence in Sustainable Food Retailing: A Pathway to Reducing Waste and Enhancing Efficiency
(Springer Science and Business Media B.V., 2026) Köse, Ş.G.; Kazançoǧlu, I.; Kazancoglu, Y.
Food waste arises in the supply chain’s distribution, marketing, and consumption phases. Retailers face problems related to food waste since it increases operating costs, causing savings and loss of profitability. Due to food waste’s environmental, economic, and social impacts, food retailers increasingly incorporating artificial intelligence-based applications into their operations to increase efficiency and ensure sustainability. Demand forecasting, inventory management and optimization, dynamic pricing, supply chain, and order optimization are some of the main artificial intelligence applications utilized to address food waste. In line with this purpose, the paper aims to highlight the importance of artificial intelligence for reducing food waste in retailing. This study focuses on how food retailers increasingly leverage artificial intelligence to reduce food waste and improve sustainability across their operations. This research was conducted through case study and these cases provide applications of artificial intelligence to the food retail industry. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2026.
Citation - Scopus: 1
The Dividing of the Sphere in Domes of Medieval Anatolia
(Springer Verlag, 2019) Özgan, Sibel Yasemin; Özkar, Mine
The stylistic language of art and architecture in medieval Anatolia largely consists of geometric features with various levels of mathematical complexity. Whereas the two-dimensional graphic designs employ certain geometric relations and rules, theirmaking, in three-dimensional space, relies on the spatial material qualities and the overall architectural form more than just visual transformations. For understanding how their architectonic harmony was implemented, it is crucial to consider not onlythe geometric design but also other parameters such as the surface geometry, the physical properties of the material, and the crafting technique. Under the patronage of Seljuks in Anatolia, the rigorous application of the decoration program on historicalbuildings manifests a collaboration coordinated by a master builder between mathematicians, designers, and craftsmen. Geometric patterns were applied to all kinds of building surfaces. Dome decorations particularly addressed challenges ofbuilding with spherical geometry. We investigate the historical ways to construct continuous patterns on dome surfaces and how each simultaneously handles aspects of geometrical calculation, the design, and construction processes.
Citation - Scopus: 4
Yeni Koronavirüs (COVID-19) Sürecinde Türkiye’de Üniversite Kütüphaneleri
(Üniversite ve Araştırma Kütüphanecileri Derneği, 2020) Gürdal, Gültekin; Çanak, Tuba Akbaytürk; Çuhadar, Sami; Çimen, Ertuğrul
Bu çalışmanın amacı Yeni Koronovirüs (COVID-19) nedeniyle binalarını kapatarak yüz yüze kullanıcı hizmetlerine ara vermek ya da askıya almak durumunda kalan üniversite kütüphanelerini tespit etmek, hizmetlerine devam edenlerin hizmetlerini hangi koşullarda, hangi sürelerle verdiğini belirlemek ve kütüphanelerin yeniden açılması durumunda yapılması gerekenler ile ilgili önerilerde bulunmaktır. Bu amacı bütünsel bir çerçevede yakalayabilmek için üniversite kütüphanelerinin farklı paydaşları olan yayıncıların, meslek örgütlerinin bu dönemdeki çalışmaları da küresel düzeyde incelenmiştir. Çalışmanın bir diğer amacı ise üniversite kütüphanelerinin altyapı, bütçe, koleksiyon, kullanıcı eğitimi, personel açısından uzaktan hizmet vermeye ne kadar hazır olduklarını, ani gelişen bu durum nedeniyle yaşanan sorunları tespit etmek ve sorunlar için çözüm önerileri sunmaktır. Çalışmanın temelini oluşturan veriler 209 (129 Devlet Üniversitesi, 75 Vakıf Üniversitesi, 5 Vakıf MYO) yükseköğretim kurumunun kütüphane yöneticilerine gönderilen anket sorularına verilen cevaplardan elde edilmiştir. Ankete 84 kurum katılmıştır. Anket sonuçları Surveey.com ve MS Excel ile analiz edilmiş ve görselleştirilmiştir.
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
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.
Citation - WoS: 4
Citation - Scopus: 6
Near-Fault Earthquake Ground Motion and Seismic Isolation Design
(Springer International Publishing Ag, 2023) Harmandar, Ebru; Erdik, Mustafa; Demircioglu-Tumsa, Mine B.; Şadan, Bahadır; Tuzun, Cuneyt; Ulker, Omer
Seismic isolation is one of the most reliable passive structural control techniques with adequately established standards for the earthquake protection of structures from earthquakes. However, it has been shown that the seismic isolation systems may not function the best for the near-fault ground motions, since in the proximity of a capable fault, the ground motions are significantly affected by the rupture mechanism and may generate high demands on the isolation system and the structure. In fact, several earthquake resistant design codes state that the seismically isolated structures located at near-fault sites should be designed by considering larger seismic demands than the demand on structures at far-field sites. When the fault ruptures in forward direction to the site most of the seismic energy arrives in coherent long-period ground velocity pulses. The ground-motion prediction equations (GMPEs) typically cannot account for such effects with limited distance metrics and lack adequate data at large magnitudes and near distances. For the reliable earthquake design of the isolated structure in near fault conditions that meets the performance objectives, the 3D design basis ground motion(s) need to be appropriately assessed. Measures in the design of the isolation system, such as modifications in the stiffness and damping characteristics, as well as in the limitation of vertical effects are needed. The behavior of the base-isolated buildings under near-fault (NF) ground motions with fling-step and forward-directivity characteristics are investigated with a rational assessment of design-basis near-fault ground motion, are investigated in a parametric format. The parametric study includes several variables, including the structural system flexibility; number of stories; isolation system characteristic (yield) strength, and the isolation periods related to the post-elastic stiffness. Furthermore, the effect of additional damping by viscous dampers were tested for some selected cases. Important findings observed from the parametric performance results and the overall conclusions of the study are provided.
Sesli Betimleme Araştırmalarında Güncel Yönelimler
(BÜTEK Boğaziçi Eğitim Turizm Teknopark Uygulama ve Dan. Hiz. San. Tic. A.Ş., 2018) Güven, Mine
Bu tanıtım yazısının amacı, dünyada sesli betimleme konusunda yürütülen araştırmalardaki güncel yönelimlerden yola çıkarak Türkiye’de sesli betimleme konusunda dilbilim bağlamında gerçekleştirilebilecek bilimsel araştırma ve etkinlikler için genel bir çerçeve çizmektir. Uluslararası alanyazınındaki araştırmalar, sesli betimlemenin üretim, iletim ve tüketim aşamalarına yoğunlaşmaktadır. Üretim aşamasıyla ilgili görsel-işitsel ürün/ortam, sesli betimleme türevleri, metnin nitelikleri ve dili, betimlemeci yetkinlikleri ve eğitimi, metin üretim zamanı, metin üretim yöntemi ve metnin seslendirilmesi konularına değinilmiştir. İletim aşamasıyla ilgili, analog ve sayısal televizyon bağlamında iletim teknolojileriyle çeşitli ortamlardaki alıcı aygıtı olanakları tartışılmıştır. Tüketim aşamasıyla ilgili olaraksa metnin kullanıcı tarafından alımlanması, deneysel çalışmalar bağlamında algısal ve bilişsel yönleriyle ele alınmıştır. Sesli betimleme araştırmalarındaki bu yönelimlerin dikkate alınması, Türkiye’deki dilbilimsel sesli betimleme çalışmaları açısından yol gösterici olabileceği gibi Türkçeye özgü en iyi uygulamaların oluşmasına da katkıda bulunabilir.
Citation - Scopus: 1
Technology Use: Analysis of Lesson Plans on Fractions in an Online Laboratory School
(PME, 2022) Pekkan, Zelha Tunç; Ünal, Gizem
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Enhanced Knowledge Transfer in Historical Site Interpretation: A Gamified Approach for Yedikule Fortress/Türkiye
(Springer Science and Business Media Deutschland GmbH, 2025) Özer, D.G.; Gül, L.F.; Coskun, E.; Kilimci, E.S.Y.; Gül, M.
This study explores the integration of wearable and portable devices in enhancing the interpretation and communication of Yedikule Fortress, a 1600-year-old historical site on the outskirts of the Istanbul’s Historic Peninsula. This interpretation involves users taking of the site tour with augmented reality/mixed reality-enhanced using audio accompaniment and gamification. The designed route provides tailored information, enhanced by a digital layer and a storyline. This study examines the quality of the information, visitor route design, and the integration of game elements. The multi-modal guidance system fosters interaction between historical narratives and spatial context, with participants reporting increased interest and improved recall of historical details. Building on the refinement of the process through expert input and participant feedback, this study also highlights limitations related to device affordances that influenced user behavior and interaction. Future research should explore the adaptability of this framework to other heritage sites, ensuring its educational and experiential relevance. © 2025 Elsevier B.V., All rights reserved.

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