TOBB ETU GCRIS Database
Not a member yet
9778 research outputs found
Sort by
Electronic and Surface Modifications of Ni–co–fe Oxides: a Catalyst With Maximum Exposure of Fe Active Sites for Water Electrolysis
No full textThe production of green hydrogen through water electrolysis is a crucial component of sustainable energy systems. One key challenge is the development of cost-effective electrocatalysts with high performance. Here, we report on the fabrication of a multilayered electrode by coating a nickel foam with nickel–cobalt–iron (Ni–Co–Fe) oxide layers (NiCoFe@NF/SD). The detailed physical and electrochemical characterizations demonstrated that the topmost layer is rich in Fe active sites. The electronic shuffling between the different layers creates an optimal environment for intermediate adsorption–desorption during the oxygen and hydrogen evolution reactions. The NiCoFe@NF/SD electrode exhibits high catalytic performance due to the presence of intrinsically reactive active sites, as well as high structural, chemical, and mechanical durability with a low overpotential of 210 and 166 mV for the oxygen and hydrogen evolution reactions, respectively, to deliver a geometric activity of 20 mA cm–2. In a two-electrode configuration, NiCoFe@NF/SD as cathode and anode requires a relatively small input voltage of 1.56 V to deliver a current density of 10 mA cm–2 and sustained a current density of 100 mA cm–2 for over 90 h with no noticeable degradation. This work offers a simple approach for the rational design of electrodes to produce green hydrogen through water electrolysis
Neurocognitive Impairment in Multiple Sclerosis and Its Association With Thiol-Disulfide Homeostasis and Ischemia-Modified Albumin
No full textThis study aimed to assess the possible association between cognitive impairment and two important biochemical biomarkers of oxidative stress, thiol-disulfide homeostasis (TDH), and ischemia-modified albumin (IMA) in patients with multiple sclerosis (MS). This study included 85 patients with MS (38 treatment-naive relapsing-remitting MS (RRMS), 31 RRMS on fingolimod therapy, and 16 secondary progressive MS (SPMS)) and 33 healthy controls. Cognitive evaluation was carried out by applying the Brief International Cognitive Assessment for Multiple Sclerosis (BICAMS) test battery and the scores were adjusted for age and years of education. Plasma TDH was assessed using an automated method and plasma IMA levels were determined using the cobalt-albumin binding assay. Plasma native thiol and total thiol levels were significantly decreased in patients with SPMS when compared with the naive patients and healthy controls. Cognitive impairment was detected in 47.4% of naive patients, 64.5% of patients on fingolimod therapy, and 80% of patients with SPMS. Naive patients or patients on fingolimod therapy who were cognitively impaired had significantly decreased levels of native thiol and total thiol compared to the cognitively normal patients. Logistic regression analysis revealed total thiol and native thiol to be significantly associated with cognitive impairment in naive patients and patients on fingolimod therapy. Significant correlations were determined between BICAMS scores, TDH, IMA, clinical indices of disease severity (EDSS and MSSS), and magnetic resonance imaging parameters. This study has shown for the first time that plasma TDH parameters are associated with cognitive impairment in MS
Dr. Nuriye Peker’in 1961 Tarihli Zavallı Çocuklar Kitabının Türkiye’de Sosyal Pediatrinin Gelişim Sürecindeki Yeri Üzerine Bir İnceleme
No full textObject: The aim of this study is to Dr. Nuriye Peker's book titled "Zavallı Çocuklar-Poor Children" is to examine comparatively the place of social pediatrics in the development process in our country. Method: First, Dr. Peker's medical education and the factors and people who were influential in her orientation to social pediatrics were examined. Afterward, the book "Poor Children" was analyzed in terms of content, discourse, and methodology, and then it was examined how the approaches to social pediatrics in the book took place in the national and international legislation of the period. Finally, the content of "Poor Children" book has been discussed within the scope of “four main objectives of social pediatrics in developing countries” defined within the first social pediatrics textbook published in our country. Results: Considering that the concept of 'nature' was at the forefront of the 'nature-nurture' debate that was active in our country and in the world at the time the book “Poor Children-Zavallı Çocuklar” was written, it is an original finding that Dr. Peker explained with her own clinical experience that the strong emotional bond to be established with the child is very important for the protection and improvement of health. Other findings related to Dr. Peker’s book are that she has a great command of her patients and their families, that she is far from judgmental towards parents throughout the book, and that she establishes a causal link with her interactions with the child. Conclusion: Dr. Peker's sensitivity, time, and knowledge to see what is behind the problems of the pediatric patients brought to her, contrary to the common understanding during her practice as a physician, reveals her notion of a child psychiatrist.Amaç: Bu çalışmanın amacı, Dr. Nuriye Peker’in “Zavallı Çocuklar” başlıklı kitabının, sosyal pedi-atrinin ülkemizdeki gelişim sürecindeki yerini karşılaştırmalı olarak incelemektir. Yöntem: Öncelikle Dr. Peker’in tıp eğitimi ve onun sosyal pediatriye yönelmesinde etkili olan unsur ve kişiler incelenmiştir. Akabinde “Zavallı Çocuklar” kitabı, içerik, söylem ve metodolojik açıdan analiz edilmiş, daha sonra kitapta yer alan sosyal pediatriye ilişkin yaklaşımların dönemin ulusal ve uluslararası mevzuatında nasıl yer aldığı irdelenmiştir. Son olarak, “Zavallı Çocuklar” kitap içeriği, 1968 yılında ülkemiz basılmış olan ilk sosyal pediatri ders kitabının yazarı olan Dr. Sabiha Özgür’ün tanımladığı ‘gelişmekte olan ülkelerde sosyal pediatrinin dört ana hedefi’ kapsamında tartışılmıştır. Bulgular: “Zavallı Çocuklar” kitabının yazıldığı dönemde ülkemizde ve dünyada etkin olan ‘nature-nurture’ tartışmasında ‘nature’ kavramının ön planda olduğu göz önünde bulundurulursa, Dr. Peker’in çocuk ile kurulacak kuvvetli hissi bağın sağlığın korunması ve iyileştirilmesi için çok önemli olduğunu kendi klinik deneyimleri ile anlatmış olması özgün bir bulgudur. Dr. Peker’in hastalarına ve ailelerine son derece hakim olması, kitabın tamamında, anne ve babaya karşı yargıdan uzak olması ve çocuk ile etkileşimlerine ilişkin nedensel bir bağ kuruyor olması ise kitaba ilişkin diğer bulgulardandır. Sonuç: Dr. Peker’in, hekimlik yaptığı dönemdeki yaygın anlayışın aksine kendisine getirilen çocuk hastaların sıkıntılarının arkasındakini görebilecek hassasiyet, duyarlılık, zaman ve bilgisinin bulunması, onun çocuk psikiyatristi görüşünü ortaya koymaktadır
Some Classes of Tetradiagonal Determinants Via Certain Polynomial Families
No full textWe present six families of tetradiagonal matrices and their periodic variations depending on four variables. We explicitly evaluate their LU-decompositions and determinants via certain four-parameter polynomials, some of which are called four-parameter Tribonacci and generalized Delannoy polynomials. We give generating functions for their determinant evaluations. Furthermore, we present applications of our results to some orthogonal polynomial families
Conceptual Design of Fixed Wing Electrical Vtol Air Transport Vehicle
No full textThere is considerable amount of different conceptual eVTOL designs to meet future urban air transportation needs. Aircraft concept design choices are highly critical for meeting the requirements at the start and intelligent choices must be worked out in the early design phase in order not to struggle with too many impractical configurations. In this work, 3 types of most promising alternative eVTOL concepts are evaluated. These configurations are: the multirotor, vectored thrust and “lift + cruise” concepts. Although hoverbikes and electric helicopters could be categorized as eVTOL, they are not suitable to meet most of the requirements, and they are excluded from consideration. Multirotor aircraft are fairly simple to build but they are not easily able to meet the requirement of say, a 100 km range, thus eliminated from consideration. On the other hand, although vectored thrust vehicles can reach high speeds and efficiencies, they are considerably complex to design and build. Finally, the present “lift + cruise configuration” has been selected for the design as it is considered the best compromise between range, hover efficiency and reliability. Although this solution has some disadvantage such as unused propellers producing high drag during cruise, overall design characteristics represents a very viable solution. © 2023, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved
Bilişsel Davranışçı Grup Terapisinin Serebral Palsi Tanısı Olan Çocuklara Sahip Ebeveynlerde İyi Oluş, Aile Yaşam Kalitesi ve Sosyal Dahil Olma Üzerindeki Etkisi
No full textBu tez çalışmasının temel amacı; SP'ye sahip çocukları bulunan ebeveynlerde araştırma kapsamında geliştirilen ve 10 oturumdan oluşan Bilişsel Davranışçı Grup Terapisi'nin bireysel iyi oluş, aile yaşam kalitesi ve sosyal dahil olmalarının üzerindeki etkilerinin incelenmesidir. Bu çalışma karma yöntemle gerçekleştirilmiş olup nicel ve nitel yöntemler kullanılmıştır. Çalışma 6 deney ve 6 kontrol grubunda olmak üzere 12 katılımcıdan oluşmaktadır. Veriler standart ölçekler ve yarı-yapılandırılmış görüşmelerden elde edilen verilerin tema analizi yöntemiyle çözümlenmesinden elde edilmiştir. Analizler sonucunda gruplar arası karşılaştırmada ölçeklerde anlamlı bir fark görülmezken; bireysel ölçümlerde güvenilir değişim endeksine göre anlamlı farklar bulunmuştur. Tema analizinden elde edilen bulgular terapiden alınan fayda ve gruba ilişkin değiştirilmesi gereken yanlar olmak üzere iki üst temadan oluşmaktadır. Elde edilen bulgular literatür ışığında tartışılmıştır.The main aim of this thesis study is to examine the effects of Cognitive Behavioral Group Therapy, consisting of 10 sessions and developed within the scope of this study, on individual well-being, family quality of life, and social inclusion of parents with children with Cerebral Palsy (CP). This study was conducted using a mixed-methods approach, incorporating both quantitative and qualitative methods. The study consists of 12 participants, 6 of them assigned to experimental group and 6 in the control group. The data were obtained through the standardized questionnaries and semi-structured interviews, which were analyzed using thematic analysis. The analysis revealed no significant differences between the groups in the scales, but significant differences were found in individual measurements according to the reliable change index. The findings from the thematic analysis consist of two main themes: benefits derived from therapy and aspects of the group that need to be modified. The obtained findings were discussed in conjunction with the relevant literature
Vlachs and Yörüks as Military Groups Under Ottoman Rule and the Evolution of Their Roles
No full textThis paper discusses the changing role of the semi-nomadic groups within the Ottoman military structure. First, the position of the yörüks—the Turkish seminomadic group—will be underlined during the foundation of the Ottoman State. It is argued that they were a significant source for the Ottoman army both as infantry and cavalry. Then, through the imperial building process which peaked during the reign of Mehmed II, they were less needed and turned into auxiliary forces. Similarly, the Vlachs were another group of semi-nomadic nature that was utilized by the Ottomans from their first encounter onwards. Being a demographic pool for the military class of the Balkans before the Ottoman arrival, they were granted their previous status by the Ottomans as well. Yet, in time, in accordance with their needs, the Ottomans turned them into auxiliary forces, too
Search for Periodic Signals in the Dielectron and Diphoton Invariant Mass Spectra Using 139 Fb−1 of Pp Collisions at √s = 13 Tev With the Atlas Detector
No full textA search for physics beyond the Standard Model inducing periodic signals in the dielectron and diphoton invariant mass spectra is presented using 139 fb−1 of s = 13 TeV pp collision data collected by the ATLAS experiment at the LHC. Novel search techniques based on continuous wavelet transforms are used to infer the frequency of periodic signals from the invariant mass spectra and neural network classifiers are used to enhance the sensitivity to periodic resonances. In the absence of a signal, exclusion limits are placed at the 95% confidence level in the two-dimensional parameter space of the clockwork gravity model. Model-independent searches for deviations from the background-only hypothesis are also performed. [Figure not available: see fulltext.] © 2023, The Author(s).IN2P3-CNRS; 2014-2021; SCI/013; U.S. Department of Energy, USDOE; Alexander von Humboldt-Stiftung, AvH; CRC Health Group, CRC: 21/SCI/017; Canarie; H2020 Marie Skłodowska-Curie Actions, MSCA; Multiple Sclerosis Scientific Research Foundation, MSSRF; CERN; Compute Canada; Göran Gustafssons Stiftelser; Natural Sciences and Engineering Research Council of Canada, NSERC; National Research Council Canada, NRC; Canada Foundation for Innovation, CFI; Science and Technology Facilities Council, STFC; Leverhulme Trust; European Research Council, ERC; European Cooperation in Science and Technology, COST; Australian Research Council, ARC; National Stroke Foundation, NSF; Neurosurgical Research Foundation, NRF; Helmholtz-Gemeinschaft, HGF; Minerva Foundation; Deutsche Forschungsgemeinschaft, DFG; Agence Nationale de la Recherche, ANR; Japan Society for the Promotion of Science, KAKEN; Ministry of Education, Culture, Sports, Science and Technology, MEXT; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF; Danmarks Grundforskningsfond, DNRF; Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP; National Natural Science Foundation of China, NSFC; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT; Fundação para a Ciência e a Tecnologia, FCT; Bundesministerium für Bildung und Forschung, BMBF; Chinese Academy of Sciences, CAS; Austrian Science Fund, FWF; Generalitat de Catalunya; Ministry of Science and Technology of the People's Republic of China, MOST; Agencia Nacional de Promoción Científica y Tecnológica, ANPCyT; Nederlandse Organisatie voor Wetenschappelijk Onderzoek, NWO; Bundesministerium für Wissenschaft, Forschung und Wirtschaft, BMWFW; Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq; Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science; Israel Science Foundation, ISF; Instituto Nazionale di Fisica Nucleare, INFN; Narodowe Centrum Nauki, NCN; Javna Agencija za Raziskovalno Dejavnost RS, ARRS; Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja, MPNTR; Ministerio de Ciencia e Innovación, MICINN; Centre National pour la Recherche Scientifique et Technique, CNRST; Staatssekretariat für Bildung, Forschung und Innovation, SBFI; Horizon 2020; British Columbia Knowledge Development Fund, BCKDF; European Regional Development Fund, ERDF; Defence Science Institute, DSI; Narodowa Agencja Wymiany Akademickiej, NAWA; Institutul de Fizică Atomică, IFA; Agencia Nacional de Investigación y Desarrollo, ANID; Royal Society of South Australia, RSSA; Irish Rugby Football Union, IRF
Hocamız Prof. Dr. Ahmet B. Ercilasun 80 Yaşında
No full textBu yıl Türk Dil Kurumu, Türklük biliminin çağımızdaki en önemli temsilcilerinden Prof. Dr. Ahmet Bican Ercilasun için doğumunun 80. yılında bir armağan kitap yayımladı. Bilindiği üzere Ercilasun, 1990’lı yıllarda Türk Dil Kurumu başkanlığı yapmış; bu görevi sırasında Türk diline ve kültürüne çok değerli hizmetlerde bulunmuştu. Kurum, bu armağanla bir kadirbilirlik örneği göstermiş oldu
Search for T(t)over-barh/A → T(t)over-Bart(t)over Production in the Multilepton Final State in Proton-Proton Collisions at √s=13 Tev With the Atlas Detector
No full textA search for a new heavy scalar or pseudo-scalar Higgs boson (H/A) produced in association with a pair of top quarks, with the Higgs boson decaying into a pair of top quarks (H/A -> t (t) over bar) is reported. The search targets a final state with exactly two leptons with same-sign electric charges or at least three leptons. The analysed dataset corresponds to an integrated luminosity of 139 fb(-1) of proton-proton collisions collected at a centre-of-mass energy of 13TeV with the ATLAS detector at the LHC. Two multivariate classifiers are used to separate the signal from the background. No significant excess of events over the Standard Model expectation is observed. The results are interpreted in the context of a type-II two-Higgs-doublet model. The observed (expected) upper limits at 95% confidence level on the t (t) over barH/A production cross-section times the branching ratio of H/A -> t (t) over bar range between 14 (10) fb and 6 (5) fb for a heavy Higgs boson with mass between 400 GeV and 1000 GeV, respectively. Assuming that only one particle, either the scalar H or the pseudo-scalar A, contributes to the t (t) over bart (t) over bar final state, values of tan beta below 1.2 or 0.5 are excluded for a mass of 400 GeV or 1000 GeV, respectively. These exclusion ranges increase to tan beta below 1.6 or 0.6 when both particles are considered.ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW; FWF, Austria; ANAS; CNPq; FAPESP, Brazil; NSERC; CFI, Canada; NSFC, China; MEYS CR, Czech Republic; DNRF; DNSRC, Denmark; IN2P3-CNRS; CEA-DRF/IRFU, France; BMBF; MPG, Germany; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT; JSPS, Japan; CNRST, Morocco; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; MESTD, Serbia; MSSR, Slovakia; ARRS; MIZS, Slovenia; MICINN, Spain; Wallenberg Foundation, Sweden; SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; DOE; NSF, United States of America; BCKDF; CANARIE; CRC, Canada [PRIMUS 21/SCI/017, UNCE SCI/013]; Czech Republic; ERC; ERDF; Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex, Investissements d'Avenir Idex; ANR, France; DFG; AvH Foundation, Germany - EU-ESF; Greek NSRF, Greece; BSF-NSF; NCN; La Caixa Banking Foundation; CERCA Programme Generalitat de Catalunya; PROMETEO; Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; Royal Society; Leverhulme Trust, United Kingdom; NDGF (Denmark, Norway, Sweden); KIT/GridKA (Germany); INFN-CNAF (Italy); NL-T1 (Netherlands), PIC (Spain); ASGC (Taiwan); BNL (USA); NWO, NetherlandsWe acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TENMAK, Turkiye; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada and CRC, Canada; PRIMUS 21/SCI/017 and UNCE SCI/013, Czech Republic; COST, ERC, ERDF, Horizon 2020 and Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex, Investissements d'Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and MINERVA, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom.; The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in ref. [114]