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On the identification and finite element treatment of macroscopic stress in Kohn–Sham density functional theory
No full textThe macroscopic stress formulation for periodic systems in Kohn–Sham density functional theory is critically examined. The identification of the stress through the partial variation of the energy with respect to cell deformation is cast in a strictly large deformation context. The nature of the non-uniqueness in the stress expression which emanates from this variation is extensively discussed. The possible lack of symmetry in this expression is highlighted and the conditions under which different expressions deliver the same tensorial value are derived. These observations are demonstrated through a finite element framework that is validated towards energy, force and stress calculations
Finite dimensional backstepping controller design
No full textWe introduce a finite-dimensional version of backstepping controller design for stabilizing solutions of partial differential equations (PDEs) from boundary. Our controller uses only a finite number of Fourier modes of the state of solution, as opposed to the classical backstepping controller which uses all (infinitely many) modes. We apply our method to the reaction-diffusion equation, which serves only as a canonical example but the method is applicable also to other PDEs whose solutions can be decomposed into a slow finite-dimensional part and a fast tail, where the former dominates the evolution in large time. One of the main goals is to estimate the sufficient number of modes needed to stabilize the plant at a prescribed rate. In addition, we find the minimal number of modes that guarantee the stabilization at a certain (unprescribed) decay rate. Theoretical findings are supported with numerical solutions
Computational modeling of the anti-inflammatory complexes of IL37
No full textInterleukin (IL) 37 is an anti-inflammatory cytokine belonging to the IL1 protein family. Owing to its pivotal role in modulating immune responses, elucidating the IL37 complex structures holds substantial therapeutic promise for various autoimmune disorders and cancers. However, none of the structures of IL37 complexes have been experimentally characterized. This computational study aims to address this gap through molecular modeling and classical molecular dynamics simulations. We modeled all protein–protein complexes of IL37 using a range of methods from homology modeling to AlphaFold2 multimer predictions. Models that successfully recapitulated experimental features underwent further analysis through molecular dynamics simulations. As positive controls, binary and ternary complexes of IL18 from PDB were included for comparison. Several key findings emerged from the comparative analysis of IL37 and IL18 complexes. IL37 complexes exhibited higher mobility than the IL18 complexes. Simulations of the IL37-IL18Rα complex revealed altered receptor conformations capable of accommodating a dimeric IL37, with the N-terminal loop of IL37 contributing significantly to complex mobility. Additionally, the glycosyl chain on N297 of IL18Rα, which contours one edge of the cytokine binding surface, acted as a steric block against the N-terminal loop of IL37. Further, investigations into interactions between IL37 and IL18BP suggested that a binding mode homologous to IL18 was unstable for IL37, indicating an alternative binding mechanism. Altogether, this study accesses to the structure and dynamics of IL37 complexes, revealing the structural underpinnings of the IL37’s modulatory effect on the IL18 signaling pathway
Corrigendum to “model organisms for investigating the functional involvement of NRF2 in non-communicable diseases” [Redox Biol. 79 (2025) 103464] (Redox Biology (2025) 79, (S2213231724004427), (10.1016/j.redox.2024.103464))
No full textThe authors regret to inform that a duplicate figure was included in the original publication. The correct version of Figure 9 is available below. The authors would like to apologise for any inconvenience caused.[Figure presented] © 2025 The Author(s
A contextualized emotion perception assessment relates to personal and social well-being
No full textEmotion Recognition Accuracy (ERA) is vital for social functioning and social relationships, yet empirical support for a positive link with well-being has been sparse. In three studies, we show that the Assessment of Contextualized Emotions (ACE) which distinguishes between accurately perceiving intended emotions and bias due to perceiving additional, secondary emotions, consistently predicted personal and social well-being. Across thirteen world cultures, accuracy was associated with higher well-being and life satisfaction, and bias linked to loneliness. A social interaction study in Czech Republic found accuracy (bias) was positively (negatively) associated with social well-being. The effects of accuracy and bias on well-being were partially mediated by social interaction quality in a third study. These findings further our understanding of ERA’s social functions
Büyümeden yetişen çocuklar: Fevzipaşa köyünde nesilden nesile aktarılan çocuk evlilikleri
No full textThis work is a student project of the Department of History, Faculty of Economics, Administrative and Social Sciences, İhsan Doğramacı Bilkent University.The History of Turkey course (HIST200) is a requirement for all Bilkent undergraduates. It is designed to encourage students to work in groups on projects concerning any topic of their choice that relates to the history of Turkey. It is designed as an interactive course with an emphasis on research and the objective of investigating events, chronologically short historical periods, as well as historic representations. Students from all departments prepare and present final projects for examination by a committee, with 10 projects chosen to receive awards.Ankara : İhsan Doğramacı Bilkent Üniversitesi İktisadi, İdari ve Sosyal Bilimler Fakültesi, Tarih Bölümü, 2025.Includes bibliographical references (pages 14-15).Çocuk evlilikleri, Türkiye’de özellikle doğu illerinde yaygın olarak görülen bir toplumsal sorundur. Bu sorunun en temel nedenleri arasında ekonomik, kültürel ve toplumsal etkenler yer almakta olup, ataerkil toplumlarda daha yaygın görülmektedir. Çocuk evliliği kavramının ne zaman kullanılmaya başladığı bilinmemektedir. Ancak 1926 tarihli Türk Medeni Kanunundaki maddeler bu uygulamanın uzun süredir var olduğunu ortaya koymaktadır. Türkiye’de yasal düzenlemelerle bu sorunu çözmeye yönelik adımlar atılmıştır. Yapılan araştırmalar, çocuk evliliği sorunundan en çok etkilenenlerin kadınlar olduğunu göstermektedir. Bu çalışmada Gaziantep’in bir köyü olan Fevzipaşa Köyü’ndeki çocuk evlilikleri araştırılmıştır. 1950-1970 yıllarındaki koşulları göz önünde bulundurularak çocuk evliliklerinin nesilden nesile aktarımı neden ve sonuç bağlamında incelenmiştir.Child marriages are a widespread social problem in Turkiye, especially in the eastern provinces. Among the primary causes are economic, social and cultural factors and the practice is more common in patriarchal societies. The exact time when the term “child marriage” began to be used remains unclear. However, the provisions in the 1926 Turkish Civil Code indicate that this practice has been going on for a long time. Over time, Turkiye has regulated laws to limit these practices. Research and collected data show that, the most affected group in child marriages are women. This study focuses on child marriages in Fevzipaşa, a village in Gaziantep. Considering the conditions of that time, the intergenerational effects of child marriages have been analyzed in terms of causes and consequences.by Abdürrahim Özer
Nano-gözenekli zeolit A’nın ultrahızlı lazer ile sentezi
No full textCataloged from PDF version of article.Includes bibliographical references (leaves 85-99).Zeolites are microporous aluminosilicate self-assembled nanocrystals. Zeolite A is the first commercially synthesized zeolite, which has cubic unit cell that consist of alumina and silica tetrahedra together with the extraframework cations like Na+, K+, Ca2+. Zeolite A has been widely studied zeolite in the literature owing to the properties like high porosity, high surface area (∼ 600 m2/g), and high chemical and thermal stability, and high ion exchange capacity. All of these properties make Zeolite A used in various industrial applications like CO2 adsorption, wastewater treatments, biosensor applications, etc. Although zeolites have a wide range of industrial uses, they have still been extensively investigated in academia as well. Accordingly, various zeolite synthesis methods have been developed, but all have limitations. While conventional hydrothermal synthesis offers benefits such as high-quality discrete crystals, ease of use, safety, and industrial scalability, it lacks precise control over nucleation and growth. A method that combines these advantages with the ability to produce defect-free crystals using low-energy photons within a short reaction time has not been developed yet. To address this, we introduce a new method for synthesizing zeolites (TPA-silicalite-1, zeolite Y, zeolite A, and hierarchical ZSM-5) using ultrafast laser energy deposition. In this approach, energy is deposited on a timescale comparable to the polymerization reactions that drive crystal formation. In this thesis study, we further investigate the ultrafast laser pulses on the synthesis mechanism and crystalline structure of nanoporous zeolite A. Utilizing a femtosecond laser at 1040 nm wavelength, we achieved controlled energy deposition in the precursor suspension, accelerating the reaction via multiphoton absorption and laser-induced flows for nearly uniform-sized zeolite A crystals (∼260 nm). Through the controlled deposition of energy, this method achieves rapid crystallization of Zeolite A with high crystallinity (90-100%) and a narrower particle size distribution compared to the crystals synthesized via the conventional hydrothermal method. Comprehensive characterizations, including Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDXS), X-Ray Diffraction (XRD), High Resolution Transmission Electron Microscopy (HRTEM), Selected Area Electron Diffraction (SAED), Thermo-gravimetric Analysis (TGA), Brauener-Emmet-Teller (BET), and Fourier Transformed Infrared (FTIR) Spectroscopy, revealed that the laser-synthesized zeolites exhibit structural integrity and quality comparable to conventionally synthesized counterparts. Moreover, CO2 adsorption capacity analysis was carried out to evaluate the gas capture performance and practical applicability of Zeolite A synthesized via the ultrafast laser synthesis method. The ultrafast laser synthesis method was successfully repeated over 80 times to enable various characterizations. This novel technique offers a rapid and alternative approach to synthesizing zeolites with precise control over structural and functional properties.by Meryem Merve Doğa
1990 sonrası Türkiye’de kadın hakları mücadelesi: toplumsal dinamikler, hukuki dönüşümler ve aktivist perspektifler
No full textThis work is a student project of the Department of History, Faculty of Economics, Administrative and Social Sciences, İhsan Doğramacı Bilkent University.The History of Turkey course (HIST200) is a requirement for all Bilkent undergraduates. It is designed to encourage students to work in groups on projects concerning any topic of their choice that relates to the history of Turkey. It is designed as an interactive course with an emphasis on research and the objective of investigating events, chronologically short historical periods, as well as historic representations. Students from all departments prepare and present final projects for examination by a committee, with 10 projects chosen to receive awards.Ankara : İhsan Doğramacı Bilkent Üniversitesi İktisadi, İdari ve Sosyal Bilimler Fakültesi, Tarih Bölümü, 2025.Includes bibliographical references (pages 28-29).1990 sonrası Türkiye’de kadın hakları mücadelesi, toplumsal dinamikler, hukuki dönüşümler ve aktivist deneyimler üzerinden şekillenmiştir. Bu makale, feminist hareketin 12 Eylül sonrası dönüşümünü, 2001 Medeni Kanun ve 2004 Ceza Kanunu reformlarını, İstanbul Sözleşmesi sürecini ve siyasi temsil mücadelesini analiz eder. Suna Mahbup İnce ile yapılan röportaj, yerel siyasetteki kadın deneyimlerini yansıtmaktadır. Kazanımların kırılganlığı ve güncel tartışmalar, toplumsal cinsiyet eşitliğinin sürdürülebilirliği açısından ele alınmıştır.The struggle for women's rights in post-1990 Turkey has been shaped by social dynamics, legal transformations, and activist experiences. This article analyzes the transformation of the feminist movement post-1980 coup, the 2001 Civil Code and 2004 Penal Code reforms, the Istanbul Convention process, and the fight for political representation. The interview with Suna Mahbup İnce reflects women's experiences in local politics. The fragility of gains and current debates are discussed in terms of sustainable gender equality.by Kudret Emiroğl
Kazan Tatar’ı Sara Vahap’ın Bolşevik İhtilali ile Japonya’ya sığınması ve Türkiye’ye taşınma öyküsü
No full textThis work is a student project of the Department of History, Faculty of Economics, Administrative and Social Sciences, İhsan Doğramacı Bilkent University.The History of Turkey course (HIST200) is a requirement for all Bilkent undergraduates. It is designed to encourage students to work in groups on projects concerning any topic of their choice that relates to the history of Turkey. It is designed as an interactive course with an emphasis on research and the objective of investigating events, chronologically short historical periods, as well as historic representations. Students from all departments prepare and present final projects for examination by a committee, with 10 projects chosen to receive awards.Ankara : İhsan Doğramacı Bilkent Üniversitesi İktisadi, İdari ve Sosyal Bilimler Fakültesi, Tarih Bölümü, 2025.Includes bibliographical references (pages 25-27).1917 Bolşevik Devrimi, Çarlık Rusya’nın sömürücü ekonomik politikalarına bir başkaldırı hareketidir. Çarlık Rejiminin baskıcı kurallarına dayanamayan Bolşevikler, 1917’de Çarlık rejimine isyan etti ve 1918’de de meclisin başına geçti. Yine 1918’de liderleri Vladimir Lenin’in emriyle Rus Çarı II. Nikolay’ı ve bütün ailesini öldürdü.1 Çarlık Rusya’nın halihazırda yaptığı Ruslaştırma politikalarından mağdur olan Türkler, Lehler ve Gürcüler gibi azınlıklar Bolşevik İhtilaline destek verdi ve özgürlük arayışına girdi. Birçok Türk etnik grubu Kızıl Ordu ve Beyaz ordunun arasındaki savaş ortamından dolayı ekonomik, sosyal ve fiziki zarar gördü ve Japonya’ya, Çin’e ve Amerika’ya göç etmek zorunda kaldı. Kazan Türkü olan Sarah Vahap Japonya’ya göç etmek zorunda kalan insanlardan biriydi. Sara, ailesinin birçoğunu Bolşevik Devriminin de içinde olduğu I. Dünya Savaşı döneminde kaybetti ve devrimden sonra iki kere Japonya’ya göç etmek zorunda kaldı. Sara’nın göç hikayesi kızı Süreyya Yazıcıoğlu ve torunu Küşat Yazıcıoğlu’na nesillerden nesile aktarıldı.The 1917 Bolshevik Revolution was a rebellion movement against Tsarist Russia. The Bolsheviks, who could not stand the Tsar Regime’s repressive rules, rebelled in 1917 and became the ruling group in the council in 1918. By the order that was given by their leader Vladimir Lenin, Bolsheviks killed Tsar II.Nikolas and his remaining family. Turks, Poles and Georgians who suffered from the Russification policies of Tsarist Russia, joined the Bolshevik Revolution and started searching for freedom. A lot of ethnic Turk groups received economic, social and physical damage during the war between The Red Army and The White Army and had no choice but to immigrate to countries like Japan, China and America. Sara Vahap, a Kazan Turk, was one of the people who had to immigrate to Japan. Sara lost majority of her family during the World War I and had to immigrate twice to Japan after the Revolution. Sara’s story had passed through generations through her daughter Süreyya Yazıcıoğlu and her grandson Küşat Yazıcıoğlu.by İbrahim Mert Öztür
11 Eylül saldırıları sonrasında havacılık sektörünün yaşadığı değişimin Türk Hava Yolları’na etkileri
No full textThis work is a student project of the Department of History, Faculty of Economics, Administrative and Social Sciences, İhsan Doğramacı Bilkent University.The History of Turkey course (HIST200) is a requirement for all Bilkent undergraduates. It is designed to encourage students to work in groups on projects concerning any topic of their choice that relates to the history of Turkey. It is designed as an interactive course with an emphasis on research and the objective of investigating events, chronologically short historical periods, as well as historic representations. Students from all departments prepare and present final projects for examination by a committee, with 10 projects chosen to receive awards.Includes bibliographical references (pages 18-20).Ankara : İhsan Doğramacı Bilkent Üniversitesi İktisadi, İdari ve Sosyal Bilimler Fakültesi, Tarih Bölümü, 2025.11 Eylül 2001’deki saldırılar küresel havacılık sektöründe güvenlik, ekonomi ve operasyonel alanlarda köklü değişimlere yol açmıştır. Çeşitli alanlardaki değişiklikler Türkiye Cumhuriyeti’ni hem ulusal hem de uluslarası açıdan etkilenmesine sebep olmuştur. Ülkemizde bulunan Türk Hava Yolları (THY) bu dönemde önemli krizler ve değişiklikler yaşamıştır. Bu makale, Türk Hava Yolları’nın (THY) bu süreçte yaşadığı dönüşümü, alınan önlemleri ve uzun vadeli etkileri , birincil ve ikincil kaynaklarla belirtmektedir.The September 11, 2001 attacks led to profound changes in the global aviation industry in terms of security, economy, and operations. The transformations in various domains affected our country both nationally and internationally. Turkish Airlines (THY), the national flag carrier, experienced significant crises and changes during this period. This paper analyzes the transformation of Turkish Airlines during this process, the measures taken, and the long-term impacts by utilizing both primary and secondary sources.by Yağmur Çeli
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