WoS İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12294/1671

Browse

Now showing 1 - 20 of 1827

Active Inductor Design for Reconfigurable Bandpass Microstrip Filter Applications
(Applied Computational Electromagnetics Soc, 2019) Belen, Mehmet A.; Mahouti, Peyman
Herein, the design of an active inductor and its typical application for a reconfigurable band-pass filter circuit are presented. The Active Inductor design consists of a passive variable phase and amplitude compensating network and a highly linear inverting amplifier in order to form a gyrator-C design. The design allows a wide frequency range for tuning the equivalent inductance and resistance values that enable it to be used as a filter design where the inductor equivalent resistance increases and improves signal rejection for band-pass filter applications. As a typical application, first-order active band-pass filter had been designed and prototyped. The simulation and measurement results of the design are compared with the performance results of counterpart designs in literature. From the experimental results, it can be concluded that the proposed design is a suitable model for design of tunable band pass filter circuits. The design has an operation band of 0.7-2.1GHz with the equivalent inductance value of 2.6nH.
Numerical Investigation of the Seismic Response of Historic Masonry Retaining Walls
(Multidisciplinary Digital Publishing Institute (MDPI), 2026) Öztürk, M.; Ay, Y.B.
Masonry retaining walls constitute an essential component of historic and urban infrastructure in seismic regions; however, their seismic performance remains insufficiently quantified due to material heterogeneity, limited tensile capacity, and complex soil–structure interaction. This study investigates the seismic response of historic stone masonry retaining walls using a finite element-based anisotropic macro-modeling approach. The analysis focuses on the perimeter retaining walls of Emirgan Grove in Istanbul, which represent culturally significant heritage structures constructed from natural limestone and cement–lime mortar. Material properties were defined based on experimental test results and representative values reported in the literature, while composite anisotropic behavior was incorporated into the numerical models. Static loads, earth pressures, and seismic actions were applied in accordance with the Turkish Building Earthquake Code (TBEC-2018) using the equivalent static earthquake load method. Representative wall segments with heights of 2.5 m, 3.5 m, 4.0 m, and 6.30 m were analyzed. The numerical results show that maximum compressive stresses reached approximately 0.48 MPa, remaining well below the allowable limit of 4.50 MPa, while maximum tensile stresses of about 0.28 MPa did not exceed the allowable tensile limit of 1.00 MPa. In contrast, shear stresses locally reached approximately 0.25 MPa, exceeding the allowable shear limit of 0.10 MPa, particularly along the soil–wall interface in taller walls. Sliding stability was satisfied in all cases, whereas overturning and shear behavior governed seismic vulnerability. These findings confirm that wall height is the primary parameter controlling seismic response and demonstrate the effectiveness of the proposed framework for preservation-oriented seismic safety assessment of historic masonry retaining walls. © 2026 by the authors.
Others of the Other: Examining Migrant Children's Delinquency Through the Exclusion-Support Matrix
(Pergamon-Elsevier Science Ltd, 2026) Unal, Beyza; Kocanci, Mustafa; Aksoy, Beyhan; Dorukoz, Kardelen Devrim; Uslu, Berk; Namal, Mete Kaan
This study aims to analyze migrant children's delinquency by examining their pathways into offending within a structural and multi-level framework. Based on a qualitative research design, data were collected through indepth interviews with 15 professionals from NGOs working directly with migrant children in T & uuml;rkiye. Thematic analysis revealed that intersecting factors such as discrimination, poverty, exclusion from education, peer influence, and limited access to services play a significant role in shaping children's pathways to crime. The findings are interpreted through theoretical lenses, including labelling theory, strain theory, attachment theory, and the social exclusion approach, emphasizing that children's involvement in crime stems not only from individual factors but also from structural vulnerabilities. As an original contribution, the study introduces the "Exclusion-Support Matrix," a conceptual tool that categorizes children's vulnerability levels across nine typologies, providing a strategic framework for targeted interventions. The matrix offers a grounded, ethically informed, and practice-based understanding of migrant children's criminalization processes. It underscores the need for rights-based, intersectional, and holistic policy frameworks capable of reshaping child protection and integration strategies. Moreover, by revealing how children move dynamically between different levels of risk, the matrix highlights the importance of differentiated, theory-informed, and context-sensitive responses. The findings provide practical guidance for service providers and policymakers seeking to design inclusive, prevention-oriented strategies for migrant children, while the Exclusion-Support Matrix serves as a transferable framework for informing child protection and social inclusion policies.
Mindfulness-Based Self-Compassion and Vagal Nerve Stimulation Impact on Heart Rate Variability, Psychological Resilience, and Sleep Quality in Earthquake Survivors
(Routledge Journals, Taylor & Francis Ltd, 2026) Tonkus, Merve Bat; Dundar, Sule Okur; Dikici, Arzu; Alagoz, Ece; Caliskan, Behice Belkis
Earthquakes pose significant risks to both psychological and physiological health by disrupting autonomic regulation and increasing stress-related disorders. This study aims to evaluate the combined effects of Mindful Self-Compassion (MSC) and vagus nerve stimulation (VNS) on sleep quality, psychological resilience, and heart rate variability (HRV) in survivors of the February 2023 Turkey-Syria earthquakes. A randomized experimental study was conducted with 26 earthquake survivors, assigned to either a combined MSC+VNS group or a VNS-only group. The intervention lasted three weeks. Pre- and post-intervention assessments included the Pittsburgh Sleep Quality Index (PSQI), the Psychological Resilience Scale, and HRV parameters (RMSSD, pNN50, LF/HF ratio). Both groups showed improvement in sleep quality and resilience, with the MSC+VNS group demonstrating greater gains. Significant improvement was observed in LF/HF ratios in both groups, indicating enhanced autonomic balance. However, changes in RMSSD and pNN50 were not statistically significant. While VNS supports stress reduction, combining it with MSC yields stronger psychological and physiological benefits. These findings suggest that integrative approaches may be particularly effective in post-disaster recovery. Future studies with larger and more diverse samples are recommended to validate and expand on these results.
Free Vibration Characteristics of Triple-Walled Viscoelastic Nanotubes Using the Stress-Driven Model
(Springer Wien, 2026) Kadioglu, Hayrullah Gun; Yayli, Mustafa Ozgur
In this study, a comprehensive analytical model has been developed to investigate the free vibration behavior of triple-walled viscoelastic nanotubes. The model has been constructed by adapting the equations of motion derived based on the stress-driven approach to the triple-walled beam form and incorporating viscoelastic effects using the Kelvin-Voigt model. A Navier-type solution method has been used to solve the problem, and the results obtained from the analyses have been presented in tables and graphs for detailed evaluation. Thus, it has been observed that the system approaches the single-walled beam behavior with the increase in bond forces, that the increase in the scale parameter raises the natural frequencies, and that viscoelastic damping significantly shapes the dynamic response. Furthermore, the interactions between these parameters have been discussed. In conclusion, this study provides an important contribution to understanding the dynamic behavior of multi-walled nanotubes.
The Relationship Between Sustainable Earthquake Awareness and Coping Strategies for Earthquake Stress Among University Students: A Cross-Sectional Study
(Cambridge University Press, 2026) Gursoy, Zehra; Solmaz, Yasemin Cavus; Aksoy, Omer; Korfeci, Yusuf
Objective This study explores the relationship between sustainable earthquake awareness and earthquake stress coping strategies among university students following the February 6, 2023, earthquake.Methods A descriptive, cross-sectional study was conducted between March and April 2024, involving 239 university students. Following the STROBE checklist, data were collected using the Personal Information Form, Earthquake Stress Coping Scale (ESCS), and Sustainable Earthquake Awareness Scale (SEAS). Ethics approval was obtained, and data were gathered through face-to-face surveys.Results The average participant age was 21 years; 67.8% were women, and 20% had direct earthquake experience. Among participants, 67.4% reported negative academic impacts due to the earthquake. Higher SEAS scores were associated with higher income, prior earthquake experiences, having an emergency kit, securing belongings, and participation in earthquake training and drills. Higher ESCS social support-seeking scores correlated with higher income, earthquake preparedness training, drill participation, awareness of emergency meeting areas, and enrollment in the child development department.Conclusion The findings highlight gaps in earthquake preparedness among university students while emphasizing the role of personal earthquake experiences in fostering awareness and adaptive coping strategies. Enhancing earthquake preparedness training could improve resilience among students in earthquake-prone regions.
The Role of Trust and Happiness in the Relationship Between Organizational Ostracism and Turnover Intentions Among Healthcare Professionals: A Serial Mediation Model
(BMC, 2026) Kopuz, Koray; Ozisli, Omer; Ekmen, Eymen; Kocak, Orhan
Background Organizational ostracism is an important yet often overlooked factor affecting healthcare professionals' well-being and retention. Guided by Social Exchange Theory and Affective Events Theory, this study examines how negative workplace interactions, such as ostracism, trigger interconnected cognitive (organizational trust) and affective (happiness at work) processes that shape turnover intention. The research focuses on understanding the link between organizational ostracism and turnover intention, emphasizing the sequential mediating roles of organizational trust (cognitive) and happiness at work (affective). Methods This cross-sectional study surveyed 403 healthcare professionals working in four large public hospitals in T & uuml;rkiye, recruited through convenience sampling. Data were collected online using SurveyMonkey and analyzed with SPSS version 23 and AMOS version 23. Descriptive statistics, confirmatory factor analysis (CFA), and path analysis were performed, and mediation effects were tested using bias-corrected bootstrapping with 5,000 resamples and 95% confidence intervals (CIs). Results Organizational ostracism was positively associated with turnover intention. When organizational trust and happiness at work were added as mediators, the direct link between organizational ostracism and turnover intention became non-significant, indicating a full mediation model. Organizational ostracism negatively influenced organizational trust and happiness at work, and both variables played significant roles in explaining turnover intention. Consistent with the cognitive-affective framework, sequential mediation analysis showed that reduced organizational trust contributed to lower happiness at work, further amplifying turnover intention. Conclusions Organizational trust and happiness at work are critical mechanisms linking organizational ostracism to turnover intention. Addressing ostracism and fostering supportive, trust-based work environments can help reduce turnover risk and strengthen healthcare teams. These findings provide actionable guidance for healthcare leaders and emphasize the importance of addressing workplace exclusion to enhance workforce stability and team effectiveness.
Mediating Role of Family Burden and Family Stress: Children Disability Type and Parenting Styles
(Hacettepe Univ, 2026) Isikli, Zehra; Ciftci, Hale Dere
Having a child with disability in the family affects mother's family burden (FB), family stress (FS) and parenting styles (PS). The mediating role of FB and FS in the relationship between children`s disability type (CDT) and mothers` PS is examined. 461 mothers having autism spectrum disorder (ASD), physical disability (PDC) and mental retardation (MR) participated in the study. Serial mediator effect, which is one of the mediator model analyzes was used. Mothers of children with ASD and MR, exhibited significantly lower democratic parenting style (DS) than mothers of children with PDC. While FB and FS cumulatively reduce DS in mothers of ASD children, they were found to have a direct effect in mothers of children with MR. In mothers of ASD children, increasing FB indirectly increased authoritarian style (AS) by increasing FS, while in mothers of MR children, the FS effect was more pronounced, while the FB effect was limited. Mothers of ASD and MR children had significantly higher permissive parenting style (PPS) levels than mothers of children with PDC. This was observed through direct and sequential effects in mothers of children with ASD, while in mothers of children with MR, this was more direct and indirectly mediated by FS. Studies and trainings can be planned to reduce the FB and FS levels in the DS of mothers with disabled children.
Infrastructures of Hope: A Theoretical Model for Precarity, Radical Empathy, and Collective Hope in Post-Disaster Urbanism
(Kare Publ, 2025) Bengu, Devran
This article proposes a four-layer theoretical model-Infrastructures of Hope (IH)-that centers the flow Precarity-Radical Empathy-Collective Hope in post-disaster urbanism, moving beyond a purely engineering view of resilience. No empirical findings are reported. The contribution is threefold: (i) theoretical- articulating IH and introducing the directed chain precarity-radical empathy-collective hope to planning scholarship; (ii) methodological-offering a context-adaptable testability/reporting template (CFA-SEM flow, Panels A/B) and principles for adapting validated scales without new scale development; (iii) application/ policy-framing Collective Action Intention (CAI) as a candidate outcome/monitoring indicator. The model draws on Butler for precarity, Bloch for hope, and Nussbaum with Caswell & Cifor for radical empathy. Through contextual adaptation of validated instruments, IH enables testing of H1-H6 paths (hope, empathy, perceived precarity, CAI). The template recommends CFA for measurement and SEM for structural relations; mediation (H6) is expected along the Empathy-CAI route. A mixed-methods sequence combines qualitative exploration (ethnographic/participatory workshops, discourse/narrative analysis, observation) with quantitative testing (adapted surveys), operationalising indicators such as framing, representational equity, and vision/scenario cycles in the discursive and temporal layers. In practice, IH recommends: (i) aligning proximity/access, permeability, and flexibility with affective safety and belonging; (ii) institutionalising par-ticipation and co-governance; and (iii) sustaining inclusive framing through vision and scenario cycles. No new scale development is claimed; measurements are adapted via back-translation, expert review, and piloting. IH frames post-disaster spatial production as an ethical and affective social transformation and offers an operationally testable theoretical architecture.
Inequalities for Analytic Functions Associated with Hyperbolic Cosine Function
(Karaganda State Univ, 2025) Azeroglu, T.; Ornek, B. N.; Duzenli, T.
In this paper, we investigate the geometric properties of a specific subclass of analytic functions satisfying the condition f'(z) < cosh(./z) meaning that the function f'(z) is subordinate to the function cosh(./z). Also, we focus on deriving sharp inequalities for Taylor coefficients, particularly for b2 and the modulus of the second derivative f''(z). Utilizing the Schwarz lemma, both on the unit disc and on its boundary, we provide essential insights into the distortion and growth behaviors of these functions. The paper demonstrates the sharpness of these inequalities through extremal functions and applies the Julia-Wolff lemma to establish boundary behavior results. These findings contribute significantly to the understanding of the analytic functions associated with the hyperbolic cosine function, with potential applications in geometric function theory. It is considered that the extremal functions obtained in this study could be potential hyperbolic activation functions in neural network architectures. This perspective builds a conceptual bridge between geometric function theory and artificial intelligence, indicating that insights from complex analysis can inspire the development of more effective and theoretically grounded activation mechanisms in deep learning. Empirical evaluation of architectures built with novel activation functions may be considered as potential future work.
Intellectual Leadership Research: A Bibliometric Review with Vosviewer
(Int Journal Contemporary Economics & Administrative Sciences, 2025) Kaptanoglu, Rana Ozyurt; Uler, Elif; Akdemir, Ali
Purpose: The aim of this study is to systematically examine the concept of intellectual leadership, which is an emerging leadership approach, and to evaluate scientific publications regarding the concept using the bibliometric analysis method. As a result of the analyses carried out through the VOSviewer program, several literature gaps regarding the concept were identified, and it was aimed to guide future studies. Method: The concept of "Intellectual Leadership" was scanned as a keyword in the Web of Science (WoS) database as of 28 May 2025, using the "all fields" search criterion. A total of 191 publications were accessed and analyzed through VOSviewer software after data cleaning. In the analysis, network maps of the concept were revealed based on co-authorship, citation, country, institution, bibliometric author matching, and bibliometric publication matching. In addition, collaborations, trends, and thematic concentrations regarding the concept were examined. Findings: It was observed that the concept was studied mainly between 2012 and 2022, while collaborations regarding this relatively new concept remained limited. Citation and co-authorship analyses revealed the existence of clusters centered around certain institutions and authors. Country-and institution-based analyses indicate that the concept has an increasing visibility in international literature. Limitations: The study is limited to publications indexed in the WoS database. The exclusion of other important databases, such as Scopus, constitutes one of the main limitations of the study. Originality Value: Since the concept of intellectual leadership is a rising field in literature, this study reveals existing gaps and contributes to making the concept more visible. In addition, it offers suggestions for future research in both methodological and thematic terms.
Consumers' E-Waste Awareness and Sustainable Disposal Behavior: A Comparative Intergenerational Analysis
(Int Journal Contemporary Economics & Administrative Sciences, 2025) Marangoz, Mehmet; Gunes, Oguzhan
With the advancement of technology and the widespread use of the internet, electronic products have begun to play an important role in our lives. Electronic products, which we encounter in every aspect of our lives, including at home, at work, and in our daily routines, possess significant economic value due to the materials they contain. However, if not disposed of properly, they pose a threat to both the environment and human health. The aim of this study is to examine consumer awareness levels and sustainable disposal behaviors (SDB) regarding electronic waste (e-waste) through an intergenerational comparison. The study aims to determine the effect of e-waste consumer awareness (EWCA) on SDB and its sub-dimensions, as well as to examine these variables within the framework of demographic characteristics (family monthly income and education level) to obtain specific findings. According to the data obtained from the study, it was determined that EWCA has a positive effect on SDB and many of the factors that constitute SDB (reduce, recycle, refuse, repair (5Rs)). Additionally, it was found that EWCA differs according to family monthly income but does not create a significant difference according to education level and generations. Regarding SDB, it was observed that SDB showed statistically significant differences across generations, while no significant differences were found in SDB based on family monthly income and education level. Furthermore, it was determined that reuse differs according to family monthly income and generations, reduction differs according to education level and generations, refusal differs according to family monthly income, and repair differs according to family monthly income and generations. The results indicate that consumers' participation in SDB will increase as a result of their increased awareness of e-waste. Furthermore, the fact that no difference was observed in SDB participation despite an increase in education level highlights the inadequacy of related studies in educational curricula. It is recommended that comprehensive educational programs on the subject be implemented and incentive measures be increased to enhance consumers' awareness of e-waste and encourage their participation in SDB.
Fatigue Risk Management in the Logistics and Aviation Sectors: A Multi-Criteria Approach
(Int Journal Contemporary Economics & Administrative Sciences, 2025) Erden, Cemile; Ilbas, Ahmet; Kaya, Hakan
Employees working in the logistics and aviation sectors are heavily exposed to fatigue risks due to challenging factors such as long working hours, irregular shift systems, high workload, and intense stress. Given the high-reliability nature of these industries, fatigue is not merely a health issue but a critical threat to operational safety and service quality. In this study, a hybrid Multi-Criteria Decision-Making (MCDM) approach was adopted to identify and analyze the main factors causing fatigue risk. The causal relationships among these factors were analyzed using the Decision-Making Trial and Evaluation Laboratory (DEMATEL) method, while their relative significance levels were evaluated with the Best-Worst Method (BWM). Eight criteria were determined based on a comprehensive literature review and expert opinions, followed by a decision-making process involving 20 industry experts. According to the DEMATEL results, "C4-Task continuity," "C6-Physiological conditions," and "C7-Level of training and awareness" emerged as the primary causal factors, indicating that improvements in these areas trigger positive effects on other variables. Meanwhile, "C1-Workload intensity" and "C2-Shift schedule and working hours" were identified as result factors. Furthermore, the BWM results highlighted that "C5-Psychological stress level," "C2-Shift schedule and working hours," and "C1-Workload intensity" were the criteria with the highest weights. Consequently, this study provides a robust framework for practitioners to prioritize fatigue risk management strategies, thereby enhancing both employee well-being and operational safety.
Evaluation of Barriers to the Adoption of Technology in Sustainable Logistics by Dematel Method
(Int Journal Contemporary Economics & Administrative Sciences, 2025) Caglar, Macide Berna; Karagoz Taskin, Bihter
Supply chain operations are conducted to achieve the goal of operational efficiency in an environmental perspective towards sustainability. Improving both employee safety and working conditions in the process of providing logistics services has become an important need in terms of social sustainability. Distribution and delivery can contribute to sustainable economic growth through the selection of transport modes that reduce costs. Technology investment is a critical issue for logistics service providers in terms of contributing to sustainability dimensions. However, there are many barriers to creating and implementing technological infrastructure for sustainable logistics activities. This research aims to examine these barriers. The barriers to the use of technology in sustainable logistics applications were identified through a literature review and the importance levels of these barriers were evaluated using multi-criteria decision-making analysis under expert opinion. DEMATEL method was used to determine the relative importance of the barriers and the effects of the barriers on each other. According to the findings obtained from the study, strategy recommendations have been developed to minimise the impact of these barriers.
Advantages, Disadvantages, and Policy Needs in the Circular Economy Transition: Evidence From Turkish Manufacturing Firms
(Int Journal Contemporary Economics & Administrative Sciences, 2025) Kuvvetli, Hilal
The circular economy (CE) has gained increasing prominence as a sustainability-oriented strategy aimed at decoupling economic growth from resource depletion, waste generation, and environmental degradation. As a systemic and long-term socio-technical transformation, the CE transition requires fundamental changes in production systems, business models, institutional frameworks, and stakeholder interactions. These dynamics are particularly relevant for Turkiye, a major manufacturing and exporting economy closely integrated into European Union (EU) markets and increasingly exposed to evolving regulatory and market pressures related to circularity. This study aims to explore how large-scale Turkish manufacturing firms perceive as advantages and disadvantages of CE adoption and the policy measures considered necessary to support the CE transition. The study addresses three research questions: (i) what advantages firms associate with the CE transition, (ii) what disadvantages they encounter, and (iii) what policy needs they consider as critical for enabling effective CE implementation. An exploratory and descriptive qualitative research design was employed, based on semi-structured, in-depth interviews with sustainability managers and experts from 11 large-scale manufacturing exporters operating across 9 industrial sectors in Turkiye. The data was analyzed using qualitative content analysis to identify key themes and categories. The findings indicate that regulatory compliance, corporate reputation, investor interest, competitive advantage, and access to finance are perceived as the main advantages of the CE transition. In contrast, firms highlight the lack of a clear and strong regulatory framework, high implementation costs, limited access to affordable financial instruments, weak supply-chain coordination, insufficient consumer demand, and information gaps as major disadvantages. Environmental and social benefits are perceived as secondary, suggesting that CE adoption is primarily driven by compliance and competitiveness considerations. The study underscores the importance of coherent and enforceable regulatory frameworks, tailored financial instruments, demand-side policies such as circular public procurement, increased societal awareness, and sector-specific transition plans. By providing firm-level insights from an emerging economy context, the study offers policy-relevant contributions to the design of effective circular economy governance frameworks.
Suicide Risk and Influencing Factors Among Cancer Patients: A Mixed-Methods Study
(Elsevier Sci Ltd, 2026) Saribudak, Tugba Pehlivan; Ustun, Besti; Cihan, Servet; Yildirim, Berna
Purpose: Suicide probability is higher in cancer patients than in the general population, yet evidence remains limited, especially in T & uuml;rkiye. This study examined suicide risk and influencing factors using a mixed-methods approach for a comprehensive understanding. Methods: This sequential explanatory mixed-methods design was conducted between October 2024-August 2025. 383 patients receiving chemotherapy for breast, lung, or colon cancer at a city hospital in I(center dot)stanbul participated. Quantitative data were collected using a Personal Information Form and the Suicide Probability Scale, and analyzed using multistage linear regression. For the qualitative phase, patients with the highest and lowest scores were purposively sampled, and data were analyzed using Colaizzi's method. Results: The mean Suicide Probability Scale score was 63.13. Regression analysis identified lower social support, longer cancer duration, lack of health insurance, and psychiatric comorbidities as predictors of higher risk. Qualitative analysis yielded five themes. The dominant themes-'Traces of the Disease' and 'Risk and Protective Factors'-showed how cancer's physical, psychological, and social consequences, together with individual risk and protective mechanisms, shaped patients' suicidal thoughts, behavior, overall distress, and resilience levels. Conclusions: Suicide risk in cancer patients is multidimensional and individualized, shaped by social, clinical, and psychological factors. Holistic support addressing both risk and protective factors is critical. Oncology nurses are pivotal in early risk detection and psychosocial support. Empathetic, patient-centered care, reinforcing protective factors, and integrating structured psychological interventions enhance resilience, reduce suicide risk, and improve quality of life. System-level measures, including accessible psychological services and social support, are also essential.
Symbolscript
(Publishing House of the Bulgarian Academy of Sciences, 2022) Caliskan, Zeynep; Erdogan, Gizem; Mutlu, Tuba; Niyazioglu, Mutlu; Hacioglu, Yalcin; Tuncdemir, Matem; Dincer, Yildiz
8-hydroxydeoxyguanosine (8-OHdG) is the most frequent oxidative DNA damage. 8-oxo-deoxyguanosine DNA glycosylase 1 (OGG1) is involved in the repair of 8-OHdG. Many studies indicated that DNA repair is decreased in type 2 diabetes (T2DM). Single nucleotide polymorphisms in DNA repair genes may be linked to a decrease in DNA repair activity. The main objective of this study was to see how the OGG1 Ser326Cys gene polymorphism affected OGG1 expression and urinary excretion of 8-OHdG in T2DM patients. OGG1 expression and OGG1 genotyping in lymphocytes were detected by immunocytochemical staining and Polymerase Chain Reaction-Restriction Fragment Length Polymorphism assay, respectively. Urinary 8-OHdG levels were measured by using ELISA kit in patients with T2DM. Compared with control cases, patients with T2DM had lower OGG1 immunopositivity and higher urinary 8OHdG levels. No significant difference was found in OGG1 immunopositivity or urinary 8-OHdG levels between subjects with different OGG1 genotypes in both groups. In conclusion, The OGG1 Ser326Cys gene polymorphism has no effect on neither OGG1 expression nor urinary 8-OHdG levels. Increased urinary 8-OHdG levels despite low OGG1 immunopositivity may be derived from the action of other DNA repair enzymes.
Citation - WoS: 34
Citation - Scopus: 49
Study of D+ → K-π+e+νe
(American Physical Society, 2016) Kolcu, Onur Buğra; The BESIII collaboration
We present an analysis of the decay D+ -> K-pi(+)e(+)nu(e) based on data collected by the BESIII experiment at the psi(3770) resonance. Using a nearly background-free sample of 18262 events, we measure the branching fraction B(D+ -> K-pi+e+nu e) = (3.77 +/- 0.03 +/- 0.08)%. For 0.8 < m(K pi) < 1.0 GeV/c(2), the partial branching fraction is B(D+ -> K-pi+e+nu e)([0.8,1.0]) = (3.39 +/- 0.03 +/- 0.08)%. A partial wave analysis shows that the dominant (K) over bar* (892)degrees component is accompanied by an S-wave contribution accounting for (6.05 +/- 0.22 +/- 0.18)% of the total rate and that other components are negligible. The parameters of the (K) over bar* (892)degrees resonance and of the form factors based on the spectroscopic pole dominance predictions are also measured. We also present a measurement of the (K) over bar* (892)degrees helicity basis form factors in a model-independent way.
Transformational Issues
(Emerald Group Publishing Ltd, 2019) Bozkurt, Bilgehan
Citation - WoS: 1
Citation - Scopus: 2
Thirring Universe Model
(IOP Publishing Ltd, 2024) Yilmaz, Nazmi; Akilli, Mahmut; Akdeniz, K. G.
In recent years, there has been a significant amount of research focused on Thirring instantons. This study aims to employ the Thirring quantum model as a theoretical Universe model to gain a more profound understanding of the beginning of the Universe. For this, we propose to analyze the entropy of the quantum states of zero energy Thirring instanton solutions and the transition to other quantum states. Our findings by also using Lyapunov exponents and the cyclic attractors as comparative nonlinear methods show that there is no entropy corresponding to instanton solutions with zero energy and that the sudden increase in entropy indicates the formation of the Universe. We evaluate the implications of this study in terms of the standard Universe model. Thus we anticipate that these results have the potential to contribute significantly to our understanding of the origin of the Universe and highlight the role of chaos and complexity in its evolution.

Browse

Recent Submissions