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Energy-based characterization of drilling-induced residual stresses in AA7075-T6
No full textThis study examines the influence of drilling parameters on thrust force, torque, active work, and axial residual stress formation in hot-forged and T6-treated AA7075, a critical high-strength aluminum alloy. A full factorial design was applied using three spindle speeds (800, 1000, 1200 rpm) and three feed rates (0.05, 0.10, 0.15 mm/rev). Cutting force and torque signals were measured using a dynamometer, and axial residual stresses were determined by X-ray diffraction at two locations along the hole depth, namely, the hole entrance (Point A) and the hole exit (Point B). The results show that feed rate is the dominant factor influencing drilling mechanics and residual stress formation, whereas spindle speed mainly affects the thermal and frictional conditions governing stress relaxation. A consistent asymmetry was observed between the two measurement locations, with the exit side exhibiting stronger stress relaxation behavior associated with breakthrough mechanics. Finally, the relationship between active work and axial residual stress is discussed using a qualitative, energy-based interpretation, highlighting active work as a physically meaningful indicator for drilling-induced residual stress evolution.Publisher's Versio
Enhancement of epoxy properties through graphene nanofillers produced in molten salt: morphological, thermal and mechanical characterization
No full textThe financial contributors to this research include the Department of Materials Science and Metallurgy at the University of Cambridge, the 2219 International Postdoctoral Fellowship Program of the Scientific and Technological Research Council of Turkey (TUBITAK), and the National Natural Science Foundation of China (Grant No. 52250610222).This research investigates the enhancement of epoxy resin properties through the incorporation of graphene nanoplatelets (GNPs), synthesized via the molten salt exfoliation method, as nanofillers. The study evaluates the morphology, thermal conductivity, and mechanical performance of the resulting nanocomposites. Electron microscopy reveals a high density of reactive edge sites in the graphene material, which enable bonding with epoxy groups during curing. It also shows a uniform dispersion of graphene nanoplatelets (GNPs) within the epoxy matrix, leading to reduced void formation and enhanced interfacial bonding. A notable improvement in the physical and mechanical properties of the epoxy was observed with the addition of GNPs up to 1.0 wt%. At this concentration, Young’s modulus increased by approximately 42% (from 2.9 to 4.2 GPa), while thermal conductivity, compressive strength, and tensile strength improved by around 41%, 9%, and 32%, respectively. These findings indicate that the integration of GNPs into epoxy resin significantly enhances both thermal and mechanical performance, positioning the nanocomposites as strong candidates for advanced structural applications.Türkiye Bilimsel ve Teknolojik Araştırma KurumuUniversity of CambridgeNational Natural Science Foundation of ChinaPublisher's Versio
Validation and normative data study for the Turkish version of the movie for the assessment of social cognition (MASC-TR)
No full textThis work was supported by the Scientific and Technological Research Council of T\u00FCrkiye (T\u00DCB\u0130TAK) (grant number 123K296). Preliminary findings of this study were presented as a posterat the 9th Scientific Meeting of the Federation of the European Societies of Neuropsychology (FESN) held in Leipzig,Germany, between 4 and 6 September 2025.Objective This study aimed to adapt the Movie for the Assessment of Social Cognition (MASC) into Turkish (MASC-TR), examine its psychometric properties, and establish normative data. Additionally, the study investigated the discriminative validity of the MASC-TR in differentiating individuals with autism spectrum disorder (ASD) from healthy controls. Methods The sample comprised 228 healthy adults and 29 individuals with ASD aged 18–45 years. Participants completed the MASC-TR along with established measures of theory of mind (ToM)—the Reading the Mind in the Eyes Test (RMET) and the Faux Pas Recognition Test (FPRT)—as well as non-social cognitive tasks assessing attention, working memory, and executive functions. Reliability analyses included internal consistency and test–retest reliability. Construct validity was assessed via convergent and discriminant correlations. Group comparisons and receiver operating characteristic analyses were used to evaluate discriminative validity, while multifactorial analysis of variance and regression analyses examined demographic effects. Results The MASC-TR demonstrated acceptable internal consistency (α=0.75) and excellent test–retest reliability (ICC=0.98). Significant positive correlations with RMET and FPRT supported convergent validity. Education level emerged as the only significant demographic predictor of MASC-TR performance. The MASC-TR successfully differentiated individuals with ASD from controls (t=−3.87, p<.001), with an optimal cutoff of 23.5 yielding 97% sensitivity and 52% specificity (area under the curve=0.72). Conclusions The findings indicate that the MASC-TR is a valid and reliable measure of social cognition in Turkish adults. The availability of culturally adapted normative data enhances its clinical and research utility for assessing ToM functioning across populations.FESNEuropean Societies of NeuropsychologyTürkiye Bilimsel ve Teknolojik Araştırma KurumuPublisher's Versio
Ekoturizm, geleneksel mimarlık ve sürdürülebilir yerleşimler
No full textTourism is a major source of income globally, but rapid, uncontrolled development to meet demand has caused serious environmental degradation. As sustainability becomes a central global concern, integrating tourism with nature in a balanced way is increasingly important. In response, ecotourism has emerged as a sustainable alternative, aiming to preserve natural and cultural heritage, respect local lifestyles, and provide socio-economic benefits to communities. Rural areas are often considered ideal locations for establishing ecotourism facilities due to several factors. Primarily, they enable the sharing of natural and cultural assets with environmentally conscious tourists while helping to reduce rural-to-urban migration. Preventing rural depopulation and strengthening local communities socially and economically are therefore key objectives of sustainable settlement development. Proper site selection is the key factor during the construction of ecotourism facilities. Incorrectly located facilities can harm the natural environment. It is also essential to preserve the authenticity of these regions while enhancing their environmental friendliness through modern systems. This study focuses on some important criteria related to ecotourism facilities that are directly related to the protection of ecological balance and ensuring rural sustainability. Accordingly, the main aim of this study is to evaluate the potential of the traditional Turkish House as a model for ecotourism facilities. Within the scope of the study firstly, a literature review was carried out focusing on ecotourism facilities. This review explored the fundamental concept, key features, site selection and construction characteristics of ecotourism facilities. Then, the suitability of the traditional Turkish House for adaptation as an ecotourism facility is evaluated. In this context, environmentally compatible design, water management, waste management, energy conservation, sustainable technology and material use have been put forward as fundamental design features. When these features are evaluated in terms of traditional Turkish House; it has been seen those issues such as the use of water-efficient fixtures, the development of waste sorting practices, use of alternative energy sources, reforestation projects to meet timber demands and the improvement of wood’s fire resistance used come to the fore.Turizm, tüm dünya ülkeleri için vazgeçilmez bir gelir kaynağıdır. Bununla birlikte, yüksek talebi karşılamak amacıyla kontrolsüz turizm tesisi inşa edilmesi, doğal çevreye büyük zarar vermektedir. Sürdürülebilirlik kaygılarının giderek arttığı günümüzde, dünyanın pek çok ülkesinde turizm alanlarının çevreyle daha uyumlu olması konusu tartışılmaktadır. Turizmin sürdürülebilir türü olarak tanımlanan “ekoturizm”, bu amaçla ortaya çıkmıştır. Bu turizm çeşidinin öncelikli amacı doğal ve kültürel dokunun korunmasına fayda sağlarken, bölge halkının yaşam tarzına saygı göstermek ve bölge halkını sosyoekonomik faydalarla desteklemektir. Kırsal bölgeler, farklı sebeplerle ekoturizm tesislerinin konumlandırılması için uygun yerler olarak kabul edilmektedir. Bu sebeplerden ilki, bölgenin doğal ve kültürel zenginliklerinin çevre koruma bilinciyle bölgeyi ziyaret eden turistlerle paylaşılmasıdır. İkincisi ise, hızlı kentleşme sürecinde sosyal ve ekonomik sebeplerle gerçekleşen göçlerin önlenmesidir. Kırsal bölgelerde nüfusu korumak ve bölge halkının sosyal ve ekonomik olarak güçlenmesini sağlamak, sürdürülebilir yerleşimlerin inşasında önemli bir hedeftir. Bununla birlikte, sürdürülebilirliğin sağlanmasında, bu bölgelerin mimari ve kültürel dokusunun korunması da önemlidir. Ekoturizm tesisleri inşa edilirken en büyük öncelik doğru yer seçimidir. Bu tesislerin hatalı konumlandırılması; doğal çevrenin zarar görmesine yol açabilmektedir. Bölgeye özgü geleneksel yapı üretim tekniklerinin korunması, modern sistemlerle donatılarak çevre dostu olma özelliğinin iyileştirilmesi de bir diğer önemli gereksinimdir. Bu çalışmada, ekolojik dengenin korunması ve kırsal sürdürülebilirliğin sağlanmasıyla doğrudan ilişkilendirilen ekoturizm tesisleriyle ilgili bazı önemli kriterler üzerinde durulmuştur. Çalışma kapsamında öncelikle ekoturizm tesislerine odaklanan bir literatür taraması yapılmıştır. Bu taramada ekoturizm tesislerinin temel kavramı, temel özellikleri, yer seçimi ve yapı özellikleri incelenmiştir. Daha sonra geleneksel Türk evinin ekoturizm tesisi olarak adaptasyona uygunluğu değerlendirilmiştir. Bu kapsamda, çevre ile uyumlu tasarım, su yönetimi, atık yönetimi, enerji korunumu, sürdürülebilir teknoloji ve malzeme kullanımı temel tasarım unsurları olarak ortaya koyulmuştur. Belirlenen bu tasarım kriterleri geleneksel Türk evi açısından değerlendirildiğinde; su korunumunu destekleyen ekipman kullanımı, atık ayrıştırma uygulamalarının geliştirilmesi, yenilenebilir enerji kullanımı, ahşap ihtiyacının karşılanmasına yönelik ağaçlandırma çalışmaları yapılması ve kullanılan ahşabın yangın direncinin iyileştirilmesi gibi konuların ön plana çıktığı görülmüştür.Publisher's Versio
Hierarchical secure key assignment scheme
No full textThis work presents a novel hierarchical key assignment mechanism for access control, designed to be computationally lightweight and optimized for digital environments with structured access policies. By leveraging orthogonal projection and distributing a basis to each group, it enables flexible and efficient left-to-right and top-down access structures. The scheme ensures that parent groups can derive the secret keys of their child groups while preventing unauthorized reverse access. It is resilient against collusion attacks and privilege escalation, offering robust key recovery and indistinguishability properties. Moreover, it guarantees strong key indistinguishability under adversarial models and facilitates a secure rekeying process without reliance on a trusted third party. To demonstrate practical efficiency, we provide a full analytical complexity evaluation showing that key derivation requires at most ∂(n2i ) operations, where ni is the dimension of the assigned subspace. For typical deployment parameters used in the experiments, the total key material per user remains compact (≈ 3,072 bits), significantly smaller than well-known post-quantum schemes such as Dilithium-5 (38,912 bits). The storage requirement scales linearly with the number of groups (ck+1 bases for c groups with at most k members), ensuring that even large hierarchies remain lightweight. Our evaluation further shows that selective rekeying affects only the descendants of the modified group, resulting in communication overhead of ∂(m′λ) bits, where m′ is the number of affected users and λ is the key length. These results collectively highlight the scheme’s scalability, low storage footprint, and suitability for large access hierarchies.Publisher's Versio
Psychometric properties of the emotional self-efficacy and prosocial behavior scales among Nigerian youths: a cross-cultural validation study
No full textThis study examined the psychometric properties of the Emotional Self-Efficacy and Prosocial Behavior scales, originally developed in Italy, among Nigerian youths residing in urban and semi-urban contexts. A total of 108 participants completed measures assessing empathic ability, problem-solving, and interpersonal communication, alongside the Prosocial Tendencies Measure, which captures helping behaviors across anonymous, public, and emotionally salient situations. The findings demonstrated acceptable internal consistency across all scales, indicating satisfactory reliability within this cultural context. Descriptive analyses showed generally low levels of empathic and problem-solving selfefficacy, while interpersonal communication self-efficacy ranged from low to high. Correlational analyses revealed that empathic, problem-solving, and interpersonal communication self-efficacy were positively associated with prosocial behaviors, particularly in emotionally demanding contexts. Additionally, empathic and problemsolving self-efficacy were positively related to public prosocial actions. Overall, the findings provide preliminary evidence supporting the cross-cultural applicability of these instruments among Nigerian youths and highlight culturally relevant patterns in selfefficacy and prosocial functioning. The study contributes to the limited literature on psychological resources and prosocial development in Sub-Saharan Africa. Future research should employ larger and more diverse samples and explore the roles of resilience, personality traits, and value orientations in shaping prosocial behavior.Publisher's Versio
The relationship between conflict management styles used by nurse managers in psychiatric clinics and the stress level of their subordinates
No full textObjectives: This study aimed to determine the relationship between the opinions of nurses working in psychiatric wards regarding their managers' conflict management styles and their self-perceived stress levels. Methods: This was a descriptive, comparative, and correlational study. The population consisted of 580 nurses working in psychiatric clinics of public and private hospitals in Istanbul, and 199 nurses were included in the sample. The "Personal Information Form," "Rahim Organizational Conflict Inventory–II (ROCI-II) Form A," and "Perceived Stress Scale" were used for data collection. Data were analyzed using frequency and percentage distributions, the Kruskal–Wallis test, Spearman correlation analysis, and the Mann–Whitney U test. Results: The participants’ mean scores on the Conflict Management Scale were as follows: integration subscale 2.50±0.90; obliging subscale 3.03±0.74; dominating subscale 2.92±0.85; avoiding subscale 2.98±0.66; and compromising subscale 2.61±0.83. The mean score of the Perceived Stress Scale was 13.78±4.74. The mean score for the perceived stress subdimension was 4.49±2.04, and for the perceived coping subdimension was 9.30±3.45. A statistically significant, weak positive correlation was found between the perceived stress subdimension and the dominating subscale, while a weak negative correlation was observed with the compromising and integration subdimensions. A weak negative correlation was also found between the perceived coping subdimension and the integration, obliging, and compromising subdimensions. Conclusion: According to the nurses, their managers most frequently use obliging, avoiding, dominating, compromising, and integration styles, respectively, in conflict management. As managers’ use of compromising and integration styles increases, the nurses’ perceived stress levels decrease.Publisher's Versio
Sol dönüşüm ve kültür
No full textKültür ve sol kuram birbirinden ayrılamaz. İkisi birbirini bütünler ve bir sarmaldır. Sol, daha önceki dönemlerde saray kültürünü feodaliteye ait saymak hatasına düştü ve o dönemin asıl kültürü olan halk kültürüne saplandı.Siyaset Bilimci Hasan Bülent Kahraman solun dönümünü ve kültürün önemini tartıştığı yazsında; “Solun geleceği kendisini yeniden düşünmesindedir ama ondan önceki hamle mutlaka kültür üstünde düşünmektir. Soldan kültüre gelinmesi bambaşka sorunlar doğurabilir ama kültürden sola gitmek gerçekçi ve doğal bir güzergahı takip etmektir. Sınıf ve ekonomi temeline oturması gereken solun en önemli seçeneği budur. Çünkü kültür öncelikle toplumsaldır ve Türkiye’de siyasal dönüşümün zorunlu adımı da toplumsal kültürün yeni bileşenlerini kavramakla mümkündür” tespitini yapıyor
Treatment and long-term outcome of mental disorders: The grim picture from a quasi-epidemiological investigation in 54,826 subjects from 40 countries
No full textIntroduction: This study registered rates of specific treatment options for mental disorders as well as their long-term outcome. Material and methods: The history of mental disorders was used as a proxy for diagnosis. The data came from the COMET-G study (40 countries; 54,826 subjects, 64.73 % females, 35.45±13.51 years old). The analysis included descriptive statistics, Risk Ratios, t-tests, and ANCOVA's. Results: 24.14 % reported a history of any mental disorder (depression >12 %, non-affective psychosis and Bipolar disorder 1 % each, >20 % self-injury, >10 % had attempted suicide, 7.17 % illegal substance abuse). Most patients were not under any kind of treatment (59.44 %) and most were not receiving treatment as recommended (e.g. 90 % of Bipolar and 2/3 of psychotic patients). No treatment at all and psychotherapy as monotherapy were consistently related to poorer outcomes. In anxiety or depression, only antidepressant monotherapy and benzodiazepines, in Bipolar disorder only antipsychotic monotherapy in males and antidepressant monotherapy in females and in non-affective psychosis antipsychotics and psychotherapy in females only, were related to good outcomes. No treatment modality was related to a good outcome in those with a history of self-harm, suicidal attempts, or illegal substance use. Only depression and treatment with antidepressants were related to metabolic syndrome. Discussion: In the community, the overwhelming majority of mental patients do not receive appropriate treatment or, even worse, no treatment at all. The outcome is unfavourable for the majority and only a few selective treatment options seem to make a difference.Publisher's Versio
Ağırlaştırılmış müebbet hapis cezasına çarptırılmış cinayet hükümlülerinde karar verme, duygu tanıma ve çocukluk çağı travma yaşantıları: bir cezaevi çalışması
No full textIntroduction: Decision-making and emotion recognition are two fundamental themes in social cognition. Disorders in these areas can lead to interpersonal, psychosocial, and legal problems for the individual and society. The likelihood of consequent aggression and crime makes them foci of forensic psychiatry over time. In this study, two developmental disorders that have a clear relationship with crime, that are antisocial personality disorder (ASPD), and psychopathy are investigated for their relationship with these social cognitive deficits.Methods: The present study involved 23 male prison inmates who were diagnosed with both antisocial personality disorder and psychopathy, as well as 23 control participants who were matched for age, gender, and level of education. Following the psychiatric interview, Reading the Mind in the Eyes Test (RMET), the Iowa Gambling Test (IGT), Toronto Alexithymia Scale (TAS), Defense Styles Questionnaire (DSQ), Childhood Psychic Trauma Scale (CTQ), Hare Psychopathy Checklist (PCL-R) were administered to all participants. Results: The results of the study showed that ASPD group performed statistically worse than healthy controls in TAS, CTQ, all items of DSQ, PCL-R Factor 1 and 2, and all the IGT scores (p<0.05). There were no statistically significant difference between in the RMET test performancesConclusion: These results suggest that ASPD and psychopathy lead to impaired decision-making behaviors due to the inability to recognize one’s own emotions and impulsivity, and that these characteristics play a critical role in the criminal behavior of individuals. In addition, contrary to expectations, the results of affective theory of mind assessed with the RMET showed similar characteristics in homicide convicts and healthy controls. These data indicate the need for further research in the field of forensic psychiatry.Publisher's Versio