WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/256

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Now showing 1 - 20 of 698

Citation - Scopus: 2
Turcoins: Turkish Republic Coin Dataset
(IEEE, 2021) Gökberk, Berk; Akarun, Lale; Temiz, Hüseyin
In this paper, we present a novel and comprehensive dataset which contains Turkish Republic coins minted since 1924 and present a deep learning based system that can automatically classify coins. The proposed dataset consists of 11080 coin images from 138 different classes. To classify coins, we utilize a pre-trained neural network (ResNet50) which is pre-trained on ImageNet. We train the pre-trained neural networks on our dataset by transfer learning. The imbalanced nature of the dataset causes the classifier to show lower performance in classes with fewer samples. To alleviate the imbalance problem, we propose a StyleGAN2-based augmentation method providing realisticfake coins for rare classes. The dataset will be published in http://turcoins.
Citation - WoS: 22
Citation - Scopus: 25
Perceptions of Dating Violence: Assessment and Antecedents
(SAGE Publications, 2020) Toplu-Demirtaş, Ezgi; Fincham, Frank D.; Öztemür, Gizem
Challenging perceptions of violence is crucial to prevent dating violence (DV), because such perceptions intervene in the organization and interpretation of violent events. However, these perceptions have received limited attention. This likely reflects the lack of a psychometric tool to do so. The current study had two purposes: to develop a measure of perceptions of psychological, sexual, and physical DV, and to explore how vertical collectivism, through hostile sexism and violence myth acceptance, shapes perceptions of DV. A total of 491 college students (55.3% women; M = 20.76 years, SD = 1.77 years) completed measures of the vertical collectivism, hostile sexism, domestic violence myth acceptance, and perceptions of DV. The results of exploratory factor analyses revealed a 15-item single-factor measure of perceptions of DV as initial construct validity, which had satisfactory internal consistency. A gender difference emerged in perceptions of DV; college women perceived psychological, sexual, and physical DV as more serious compared with college men. Moreover, the association between vertical collectivism and perceptions of DV was serially mediated via hostile sexism and violence myth acceptance. The findings are discussed in terms of previous research and the need to address the role of vertical collectivism in sexism, myth acceptance, and perceptions of violence in prevention/intervention efforts to reduce vulnerability to DV perpetration and victimization. Several recommendations are outlined to facilitate future research.
Citation - WoS: 2
Citation - Scopus: 5
Increasing Procurement Efficiency Through Optimal E-Commerce Enablement Scheduling
(Emerald Group Publishing Ltd., 2019) Özlük, Özgür; Cholette, Susan; Clark, Andrew G
Purpose: This study aims to show how cost savings can be achieved through optimizing the scheduling of e-commerce enablements. The University of California is one of the largest, most prestigious public education and research systems in the world, yet diminished state support is driving the search for system-wide cost savings. Design/methodology/approach: This study documents the preparation for and rollout of an e-procurement system across a subset of campuses. A math programing tool was developed for prioritizing the gradual rollout to generate the greatest expected savings subject to resource constraints. Findings: The authors conclude by summarizing the results of the rollout, discussing lessons learned and their benefit to decision-makers at other public institutions. Originality/value: The pilot program comprising three campuses has been predicted to yield $1.2m in savings over a one-year period; additional sensitivity analysis with respect to savings, project timelines and other rollout decisions illustrate the robustness of these findings.
Citation - WoS: 3
Citation - Scopus: 4
A Novel Graph Transformation Strategy for Optimizing Sptrsv on Cpus
(Wiley, 2023) Yılmaz, Buse
Sparse triangular solve (SpTRSV) is an extensively studied computational kernel. An important obstacle in parallel SpTRSV implementations is that in some parts of a sparse matrix the computation is serial. By transforming the dependency graph, it is possible to increase the parallelism of the parts that lack it. In this work, we present a novel graph transformation strategy to increase the parallelism degree of a sparse matrix and compare it to our previous strategy. It is seen that our transformation strategy can provide a speedup as high as 1.42x$$ 1.42x $$.
Citation - WoS: 16
Citation - Scopus: 20
Selecting Suicide Ideation Assessment Instruments: a Meta-Analytic Review
(SAGE Publications, 2017) Duncan, Kelly; Atalay, Zümra; Erford, Bradley T.; Jackson, Jessica; Bardhoshi, Gerta
Psychometric meta-analyses and reviews were provided for four commonly used suicidal ideation instruments: the Beck Scale for Suicide Ideation, the Suicide Ideation Questionnaire, the Suicide Probability Scale, and Columbia–Suicide Severity Rating Scale. Practical and technical issues and best use recommendations for screening and outcome research are offered.
Directions for Getting Lost: or How To Change Your Mind
(2018) West, Mark W.
Architect Mark W West creates work that is incredibly delicately drawn. Here he documents the construction of his drawings, while his friend, whose name is also Mark West, contributes a commentary about the creative process behind them. The two texts reveal how the works defy the damage caused by reductive traditional architectural education and general experience, and open the viewer to a sense of greater wholeness, however disturbing this may be.
Citation - WoS: 1
Citation - Scopus: 1
Developmental Differences in Children and Adults' Enforcement of Explore Versus Exploit Search Strategies in the United States and Turkey
(Wiley, 2024) Kiefer, Sarah L.; Aksu, Ece; Şen, Hilal H.; Lucca, Kelsey
Across development, as children acquire a deeper understanding of their environment, they explore less and take advantage, or "exploit," what they already know. Here, we test whether children also enforce exploration-oriented search behaviors onto others. Specifically, we ask whether children are more likely to encourage a search agent to explore versus exploit their environment, and whether this pattern varies across childhood (between 3 and 6 years). We also ask whether this pattern differs between children and adults, and generalizes across two different sociocultural contexts-Turkey and the United States-that differ on dimensions that might relate to children's decisions about exploration (e.g., curiosity-focused educational practices, attitudes toward uncertainty avoidance). Participants (N = 358) watched an agent search for rewards and were asked at various points whether the agent should "stay" (exploit) in their current location, or "go" (explore) to a new location. At all points in the experiment, children enforced exploration significantly more often than adults. Early in the agent's search, children in the US enforced exploration more often than children in Turkey; later in the search, younger children (from both sociocultural contexts) were more likely to continue enforcing exploration compared to older children. These findings highlight that children are not only highly exploratory themselves, but also enforce exploration onto others-underscoring the central role that exploration plays in driving early cognitive development across diverse sociocultural contexts.Research Highlights The current study examined developmental and cross-cultural differences in children and adults' enforcement of explore-exploit search strategies. Children in the US and Turkey enforced exploration more than adults, who enforced exploitation more often; results were generally consistent across cultures with small differences. Mirroring developmental changes in children's own search behavior; the tendency to enforce exploration decreased between 3- to 6-years of age. Findings underscore the central role of an "exploration mindset" in children's early decision-making-even when exploration has no direct benefits to the child themselves.
Citation - WoS: 2
Citation - Scopus: 2
Classification of Altruistic Punishment Decisions by Optical Neuroimaging and Machine Learning Methods
(IEEE, 2023) Erözden, Ozan; Şahin, Türkay; Akyürek, Güçlü; Filiz, Gözde; Çakar, Tuna
Altruistic punishment (third-party punishment) is important in terms of maintaining social norms and promoting prosocial behavior. This study examined data obtained using the near infrared spectroscopy (fNIRS) method to predict altruistic punishment decisions. It was found that specific neural activity patterns were significantly related to decisions regarding the punishment of the perpetrator. This research contributes to the development of social decision-making models and helps advance our understanding of the cognitive and neural processes involved in third-party punishments.
The Provocation of Jasper Johns: Pushing the Representational Limits of Pictorial Expression
(2020) Keki, Başak
Bu çalışma Jasper Johns’un kabaca 1955-1965 yılları arasındaki çalışmalarındaki görsellik ve sözel dil arasındaki ilişkiyi inceler. Sanatçının Numbers in Colors / Renkli Numaralar (1958-59), Gray Alphabets / Gri Alfabeler (1956), False Start / Hatalı Çıkış (1959), Jubilee / Jübile (1959), By the Sea / Deniz Kenarı (1961), Fool’s House / Ahmağın Evi (1962), Map / Harita (1961), The Critic Sees / Eleştirmen Görüyor (1961), Voice / Ses (1964-67), Voice 2 / Ses 2 (1982), Light Bulb / Ampul (1958) ve Watchman / Gözcü (1964) gibi işleri görsel ve sözel dillerin birbirleriyle ne kadar yakın ilişki içerinde olduğunu açığa çıkararak bize resimsel ifadenin sınırlarına ilişkin meseleleri araştırma alanı sağlar. Ancak bu alanlar arasındaki ilişki içerisinde yoğun olarak kesinti, karmaşa ve gerilim de barındırır. Herhangi bir görsel sanat eserini doğru bir şekilde değerlendirebilmek için eninde sonunda bakma alışkanlıklarımızı askıya alıp bakma eyleminin kendisine has karmaşıklığını fark etmek durumunda kalırız. Johns’un eserleri de bakma deneyiminin çeşitliliğine (görmek, seyretmek, selamlamak, okumak, saymak, incelemek, ezberlemek, casusluk yapmak, röntgenlemek, gözünü dikmek vs.) dikkat çekerek bize görme alışkanlıklarımızı sorgulatır. Bu çalışma, Johns’un eserlerini bu denli kışkırtıcı kılan özelliğin görsel alemin kendi içinde saf bir alan olmaktan ziyade sürekli olarak sözel dil ve diğer duyuların etkisine maruziyetinin vurgulanması olduğunu iddia eder.
Citation - WoS: 1
Citation - Scopus: 1
A Novel Tunable Vortex-Induced Vibration Wind Energy Harvester
(Ieee, 2024) Dorantes Gonzalez, Dante Jorge
This study presents a novel approach to enhancing the efficiency and robustness of vortex-induced vibration energy harvesters for wind energy conversion. Through the development and evaluation of alternative tunable stiffness mechanisms, particularly focusing on a discrete-tunable mechanism with three levels of torsional springs, significant improvements in energy capture and construction simplicity have been achieved. By optimizing dynamic models and conducting thorough structural analyses, potential weaknesses in the design have been identified and addressed. The innovative tunable mechanism, currently undergoing patent review, represents a substantial advancement in the field of renewable energy technologies, offering a promising solution for urban energy harvesting applications. This research underscores the importance of continuous innovation and optimization in energy harvesting systems to meet the evolving demands for sustainable energy production.
Citation - WoS: 1
Citation - Scopus: 1
Estimated Probabilities of Positive, Vs. Negative, Events Show Separable Correlations With Covid-19 Preventive Behaviours
(Elsevier, 2022) Aksu, Ayça; Booth, Robert W.; Yavuz, Burak Baran; Peker, Müjde
Research has associated optimism with better health-protective behaviours, but few studies have measured optimism or pessimism directly, by asking participants to estimate probabilities of events. We used these probability estimates to examine how optimism and/or pessimism relate to protecting oneself from COVID-19. When COVID-19 first reached Turkey, we asked a snowball sample of 494 Istanbul adults how much they engaged in various COVID-protective behaviours. They also estimated the probabilities of their catching COVID-19, and of other positive and negative events happening to them. Estimated probability of general positive events (optimism) correlated positively with officially-recommended helpful behaviours (e.g. wearing masks), but not with less-helpful behaviours (e.g. sharing ‘alternative’ COVID-related information online). Estimated probabilities of general negative events (pessimism), or of catching COVID, did not correlate significantly with helpful COVID-related behaviours; but they did correlate with psychopathological symptoms, as did less-helpful COVID-related behaviours. This shows important nuances can be revealed by measuring optimism and pessimism, as separate variables, using probability estimates.
Citation - Scopus: 5
An Antipodal Vivaldi Antenna Design for Torso Imaging in a Coupling Medium
(IEEE, 2021) Çayören, Mehmet; Bilgin, Egemen; Joof, Sulayman; Doğu, Semih
An antipodal Vivaldi antenna designed to operate in a coupling medium with a relative dielectric constant of epsilon(r) = 25 for microwave imaging of torso is presented in this paper. The proposed antenna is similar to the conventional antipodal Vivaldi antenna but with optimized parameters to radiate in the desired coupling medium. The antenna has a size of 120x70 mm(2) and operating over 230-1000 MHz frequency bandwidth with a peak gain of 5.42 dBi and peak front-to-back ratio of 143 dB. The designed antenna shows a better performance compared to other antennas used for microwave torso imaging. To assess the actual performance, a realistic human torso phantom is implemented to detect the water accumulation in the lungs, and as the inversion method linear sampling method is used. The 3-D reconstruction results show that the proposed antenna can be a candidate for microwave torso imaging applications.
Citation - WoS: 30
Citation - Scopus: 27
Drivers of Cultural Success: the Case of Sensory Metaphors
(2015) Berger, Jonah; Akpınar, Ezgi
Why do some cultural items catch on and become more popular than others? Language is one of the basic foundations of culture. But what leads some phrases to become more culturally successful? There are multiple ways to convey the same thing and phrases with similar meanings often act as substitutes, competing for usage. A not so friendly person, for example, can be described as unfriendly or cold. We study how the senses shape cultural success, suggesting that compared with their semantic equivalents (e.g., unfriendly person), phrases which relate to senses in metaphoric ways (e.g., cold person) should be more culturally successful. Data from 5 million books over 200 years support this prediction: Sensory metaphors are used more frequently over time than are their semantic equivalents. Experimental evidence demonstrates that sensory metaphors are more memorable because they relate more to the senses and have more associative cues. These findings shed light on how senses shape language and the psychological foundations of culture more broadly.
Citation - WoS: 52
Citation - Scopus: 60
De-Europeanisation in Turkey: the Case of the Rule of Law
(Taylor & Francis, 2016) Saatçioğlu, Beken
This article investigates the political dynamics shaping the post-2010 ‘de-Europeanisation’ of Turkey’s judicial system, particularly regarding judicial independence and rule of law. The analysis suggests the limits of conventional Europeanisation accounts emphasising causal factors such as European Union (EU) conditionality and the ‘lock-in effects’ of liberal reforms due to the benefits of EU accession. The article argues that the Justice and Development Party’s (AKP’s) bid for political hegemony resulted in the reversal of rule of law reforms. De-Europeanisation is discussed in terms of both legislative changes and the government’s observed discourse shift.
Citation - WoS: 2
Citation - Scopus: 2
Parental Predictors of Children’s Math Learning Behaviours in Different Cultures
(Springer, 2022) Selçuk, Bilge; Kisbu-Sakarya, Yasemin; Niehues, Wenke
Research indicates that parental schoolwork involvement is beneficial for students' academic functioning when parents facilitate their children's autonomy and refrain from psychological controlling practices. However, effects of the quality of parental involvement on child learning outcomes may vary due to cross-cultural differences in children's appraisal and reaction towards these practices. The current study aimed to investigate the link between the quality of parental schoolwork involvement and children's learning-related behaviours in math, and the mediating role of mother-child conflict around math schoolwork in this link in three cultural groups (i.e., German-Turkish, Turkish and German families). Data were collected from 107 German-Turkish, 426 Turkish and 140 German mothers with children in fifth to eighth grades. After testing measurement invariance of the scales across groups, multi-group structural equation modelling was used to examine the direct and indirect paths between the quality of parental involvement, mother-child conflict and child learning-related behaviours. Results showed that the level of mother-child conflict mediated the link between mothers' psychologically controlling practices and children's learning-related behaviours in math in all three groups. No mediation was found for the link between maternal autonomy support and children's learning-related behaviours in any group. However, the direct path from mothers' autonomy support to children's learning-related behaviours was significant in the Turkish and German-Turkish samples. These results suggest that the role of different forms of parental schoolwork involvement in children's academic functioning is more similar than different across cultural groups.
A Comparative Analysis of the Health Care Utilization and Costs of Patients Diagnosed With and Without Liver Cancer in the Us Medicare Population
(2017) Ogbomo, A.; Lin, Y.; Keshishian, A; Xie, L; Yuce, H; Başer, Onur
...
Strategic Fixed-Asset Management (capital Budgeting) in Small and Medium Sized Businesses
(Emerald Group Publishing Ltd., 2015) Karadağ, Hande
...
Spatial Distribution of the Total Number of Medical Devices in Turkey: a Classification Analysis
(2016) Cinaroğlu, S.; Başer, Onur
Objectives: The unbalanced distribution of medical technologies and devices between rural and urban areas is a major problem for developing countries including Turkey. After the establishment of Public Hospital Unions (PHUs) in Turkey, legislative changes were made to improve the autonomy of public hospitals. This study utilizes spatial analysis to assess the distribution of medical device use in Turkey using PHUs as a decision making unit. Methods: Data from the PHUs’ statistics year book for the year 2014 was assessed. The total number of PHUs is 89. A Hierarchical cluster analysis was performed to classify PHUs according to the total number of medical devices. The Euclidean distance measure and Wards methods were used in the analysis for classification. Results: Study results show that, in Turkey, PHUs were categorized into two clusters based on the total number of medical devices available. Regarding the spatial distribution of the clusters, the first cluster represents PHUs in rural areas, and the second represents PHUs located in urban areas of Turkey. PHUs representing large cities with high population density were included in one cluster, and all other PHUs were included in the second. Statistical test results indicated that the two clusters differ according to the total number of magnetic resonance imaging (MRI: t= -14.10, p< 0.01), computed tomography (CT) scan (t= -15.75, p< 0.01), mammography (t= -11.40, p< 0.01), ultrasonography (t= -14.62, p< 0.01), and electrocardiography (EKG; t= -12.29, p< 0.01) equipment available. Conclusions: It is advisable for health policy makers and health technology assessment authorities in Turkey to focus on the differences between rural and urban areas of the country when determining the need for medical devices.
The Role English Plays in the Construction of Professional Identities in Nest-Nnes Bilingual Marriages in İstanbul
(Palgrave, 2015) Kurban, Caroline Fell
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Citation - WoS: 15
Citation - Scopus: 13
Calibration of the Effective Spring Constant of Ultra-Short Cantilevers for a High-Speed Atomic Force Microscope
(2015) Xu, Lin-Yan; Wu, Sen; Hu, Xiao-Dong; Song, Yun-Peng; Fu, Xing; Zhang, Jun-Ming; Dorantes-Gonzalez, Dante Jorge
Ultra-short cantilevers are a new type of cantilever designed for the next generation of high-speed atomic force microscope (HS-AFM). Ultra-short cantilevers have smaller dimensions and higher resonant frequency than conventional AFM cantilevers. Moreover, their geometry may also be different from the conventional beam-shape or V-shape. These changes increase the difficulty of determining the spring constant for ultra-short cantilevers, and hence limit the accuracy and precision of force measurement based on a HS-AFM. This paper presents an experimental method to calibrate the effective spring constant of ultra-short cantilevers. By using a home-made AFM head, the cantilever is bent against an electromagnetic compensation balance under servo control. Meanwhile the bending force and the cantilever deflection are synchronously measured by the balance and the optical lever in the AFM head, respectively. Then the effective spring constant is simply determined as the ratio of the force to the corresponding deflection. Four ultra-short trapezoid shape cantilevers were calibrated using this method. A quantitative uncertainty analysis showed that the combined relative standard uncertainty of the calibration result is less than 2%, which is better than the uncertainty of any previously reported techniques.

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