Gümüşhane ÜniversitesiGümüşhane ÜniversitesiAçık Erişim Arşivi · RDL Open

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  • MakaleAçık Erişim2025Scopus SJRQ3
    Electricity in Ottoman Commercial Enterprises as a New Power Source

    Damlibag, Fatih

    Until the last quarter of 19th century, steam power was the only available source of power for commercial enterprises. But this power required large amounts of investment. This requirement limited the spread of mechanization. But the invention of electrical motors changed the situation. With its practical usage opportunities, electricity took attention of several commercial enterprises in the Ottoman Empire. According to former steam power, electricity provides both usage easiness and lesser cost opportunity to commercial enterprises. Thanks to electrical engines, relatively small businesses were also able to take decision of mechanization. In this article, there were shown examples from six sectors, who wanted to benefit from electricity in their activities. Entrepreneurs made investments in mining, logistics, jewelry, transportation, ginning and milling, for this new technology. With electricity investments, entrepreneurs wanted to reach seven advantages that there were communication possibility, safer working environment, energy efficiency, better lighting, easy utilization, reduced cost and increased productivity. As to the Ottoman government's approach to these entrepreneurs, the officials did not always eagerly meet their demands. Most of the custom officials were reluctant to accept electrical appliances into the country. But in the end, demands of entrepreneurs were mostly accepted by the government. For the control of these demands, the Ottoman Empire wanted both the purpose of each request and the person responsible for that request to be clearly determined.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    Web of ScienceTR Dizinİncele
  • MakaleYalnız künye2025
    Determinants of Tax Compliance: Ethical and Economic Values, Social Norms and Perception of Corruption

    Yelboga, Alim; Özdemir, Hakan

    Using data from the World Values Survey (2017-2021), this study examines the impact of factors such as ethical values, social norms, and perceived corruption on tax compliance, employing an ordered logistic regression analysis. The findings indicate that individuals' ethical values are the strongest determinant of tax compliance, whereas perceived corruption has a statistically significant but comparatively weaker effect. While a significant portion of the findings are consistent with existing literature, the study's clearer demonstration of the relative impact of ethical values compared to other factors constitutes a complementary contribution to the literature. Overall, the results confirm that tax compliance is shaped not only by economic incentives but also by individuals' values and perceptions. The findings demonstrate the importance of strengthening ethical values and social trust in enhancing voluntary tax compliance.

    AtıfTR Dizin1
    Web of ScienceTR Dizinİncele
  • MakaleAçık Erişim2025
    Interactional Roles of Proactive Personality and Religious Attitude Levels in the Effect of Disappointment Intolerance on Mental Health of Earthquake Victims

    Maraslioglu, Serife Ericek

    Earthquakes, as natural disasters, are stressful life events characterized by frustration, uncertainty, and psychological burden. In fact, disappointment intolerance - the inability to tolerate distressing or obstructive experiences - has been shown to predict both life satisfaction and depressive symptoms. The present study aims to examine the mediating role of proactive personality in the relationship between disappointment intolerance beliefs and mental health, as well as the moderating role of religious attitudes in this relationship among earthquake victims living in container cities after the 6 February earthquakes. The participants were survivors residing in the region's most severely affected materially and morally by the earthquake centered in Kahramanmara & scedil;, T & uuml;rkiye. Data were collected from 354 individuals 18 months after the earthquake using the Demographic Information Form, Frustration Discomfort Scale, Proactive Personality Scale, Religious Attitude Scale, and Mental Health Scale. Pearson correlation, mediation, and moderation analyses were conducted. The findings indicated that higher levels of frustration intolerance were associated with increased levels of depression, anxiety, and stress. Furthermore, proactive personality was found to mediate the effect of disappointment intolerance subdimensions (entitlement, achievement, emotional intolerance, and discomfort intolerance) on mental health outcomes. However, religious attitudes did not moderate the negative impact of disappointment intolerance on depression, anxiety, and stress. The results are discussed considering existing literature, and implications for future research and intervention strategies are offered.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS1OpenAlex1
    Web of ScienceTR Dizinİncele
  • MakaleYalnız künye2025Scopus SJRQ3
    POST-ACCIDENT RISK PERCEPTION, OCCUPATIONAL TRAUMAS, AND TRANSFORMATIONS IN PROFESSIONAL RESILIENCE: A PHENOMENOLOGICAL STUDY ON OCCUPATIONAL SAFETY SPECIALISTS IN THE MINING SECTOR

    Dogan, Onur

    This study aims to examine the occupational traumas experienced by occupational safety specialists following fatal, limb-loss, and serious injury-related workplace accidents, as well as the impact on their safety perceptions and the preventive strategies they develop. This research was conducted using a phenomenological approach, which is a type of qualitative research design. In-depth semi-structured interviews were carried out with 14 occupational safety experts working in various regions of Turkey. Criterion sampling was used to select participants. The data obtained were systematically analysed using thematic analysis. Interviews continued until data saturation was reached, and recurring patterns were observed. The research process and the reporting of findings were structured in accordance with the COREQ checklist. The study identified three main themes: occupational trauma, altered risk perception, and new safety strategies. These reflect specialistic psychological and professional changes following workplace accidents. The study offers insights into how occupational safety specialists adapt their policies and improve safety culture after serious accidents. It emphasises changes in precautionary approaches and their role in fostering safer workplaces. Key policy and cultural enhancement recommendations are also proposed.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    • SDG 8 · İnsana Yakışır İş ve Ekonomik Büyüme
    • SDG 16 · Barış, Adalet ve Güçlü Kurumlar
    Web of Scienceİncele
  • MakaleAçık Erişim2025
    The Effect of Hemodialysis Patients' Attitudes Towards Dietary Treatment on Dialysis Symptoms: A Randomized Controlled Clinical Study

    Aktepe Cosar, Dilan; Demírag, Hatice

    Objective: This study was conducted to determine the effect of hemodialysis patients' attitudes towards diet therapy on dialysis symptoms. Methods: The data of the randomized controlled study were collected from experimental (n=30) and control groups (n=30) at G & uuml;m & uuml;& scedil;hane Province Kelkit State Hospital between 1 November 2023 and 1 January 2024. Institutional and ethics committee permissions were obtained before the study. The experimental group patients were given training on diet therapy. Patient information form, hemodialysis patients' attitude scale towards diet therapy (HDTO) and dialysis symptom index (DSI) were used to collect data. Data collection tools were applied before the study (pre-test), after the training was given (intermediate measurement) and one month later (post-test). The data were analyzed using the chisquare, repeated measures ANOVA test and independent groups t-test in the SPSS 25.0 package program. Results: It was determined that the post-training measurements (intermediate measurement) of the total HDTO and sub-dimensions score averages of the hemodialysis patients in the experimental group were higher than the pre-training (pre-test) measurements; and the measurements made 1 month after the training (post-test) were lower than the measurements made immediately after the training (intermediate measurement) (p<0.05). Again, the post-training measurements (intermediate measurement) of the DSI score averages of the experimental group of patients were lower than the pre-training (pre-test) measurements (p<0.05); it was determined that the measurements made 1 month after the training were given (post-test) did not differ from the measurements made immediately after the training (intermediate measurement) (p>0.05). Conclusion: In line with the findings, it was determined that the diet therapy training provided increased hemodialysis patients' attitudes towards diet therapy and reduced dialysis symptoms.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    Web of ScienceTR Dizinİncele
  • MakaleYalnız künye2025Scopus SJRQ2
    Design of a fractional-order neural network-based fixed-time sliding mode controller for chaotic satellite attitude control and synchronization

    Bingöl, Ozhan

    PurposeThis study aims to propose a novel fractional-order neural network-based fixed-time sliding mode controller to address the challenges of chaotic satellite attitude control, synchronization and anti-synchronization. By integrating fractional-order dynamics and neural network-based estimation, the proposed approach enhances robustness and adaptability in stabilizing complex systems.Design/methodology/approachThe proposed control scheme introduces a novel sliding surface that leverages fractional calculus to improve convergence speed and control flexibility. A neural network is used to adaptively estimate unknown error dynamics, compensating for uncertainties in the system. The fixed-time stability property guarantees convergence within a predefined time, independent of initial conditions. Theoretical stability proofs and numerical simulations are conducted to validate the effectiveness of the proposed controller.FindingsThe results demonstrate that the proposed controller effectively stabilizes chaotic satellite attitude dynamics and ensures reliable synchronization and anti-synchronization. The approach exhibits strong robustness against system uncertainties and external disturbances while achieving fixed-time convergence.Originality/valueThis work advances the field by integrating fractional-order dynamics with a neural network-based adaptive mechanism in a fixed-time sliding mode control framework. The proposed method enhances convergence properties and robustness in controlling chaotic satellite attitude systems, providing a novel and effective solution for complex nonlinear dynamics.

    AtıfWoS4OpenAlex3
    Web of Scienceİncele
  • MakaleYalnız künye2025
    An evaluation on the transformation of local governments in Turkey with new public management reforms

    Dogan, Kadir Caner

    As globalization increased its importance in the world after the 1980s, local governments emerged as an active administrative subject in this process. As a matter of fact, local governments increased their capacity in terms of democracy and efficiency by integrating with the new public administration reforms that increased their impact in this period. As a matter of fact, a similar process took place in Turkey. In this study, it is aimed to focus on democracy, participation and effectiveness at the principle and institutional level after the regulation of local governments in Turkey with new public management reforms. The method of the study is literature review within the framework of qualitative analysis.

    Web of Scienceİncele
  • MakaleAçık Erişim2025Scopus SJRQ2
    Management of Major Arterial Injuries: A Critical Complication of Endoscopic Endonasal Surgery

    Emengen, Atakan; Yilmaz, Eren; Gokbel, Aykut; Uzuner, Ayse; Cakir, Ozgur; Ciftci, Ercument; Ozsoy, Bedrettin; Ergen, Anil; Caklili, Melih; Cabuk, Burak

    BACKGROUND AND OBJECTIVES:Endoscopic endonasal surgery (EES) is the preferred approach for treating sellar and parasellar lesions due to its panoramic view and detailed anatomical definition. This study aims to review major arterial injuries during EES, a rare but critical complication associated with high mortality and morbidity rates.METHODS:A retrospective analysis was conducted, including 15 patients from 5640 EES procedures performed between August 1997 and February 2024 at in our center/Department of Neurosurgery. The study focuses on perioperative and postoperative management strategies, highlighting the use of oxidized regenerated cellulose (Surgicel (R))/gelatin-thrombin matrix (Floseal (R)) and multidisciplinary collaboration to achieve hemostasis.RESULTS:The incidence of major arterial injury was 0.2%, with a mean patient age of 38.4 years and a female-to-male ratio of 10:5. The most common tumors were adenomas (n = 7) and chordomas (n = 5). The most commonly bleeding arteries in 6 patients each are the cavernous segment of the internal carotid artery and the paraclival carotid artery. Low-flow bleeding was observed in 10 of our patients, while high-flow bleeding was seen in 5 patients, 4 of whom were recurrent cases (P < .05). In 3 patients with high-flow bleeding from segments of the carotid artery, digital subtraction angiography was performed for stent placement or coil embolization, while in 1 patient with high-flow bleeding, digital subtraction angiography was used for monitoring cerebral blood flow. One of our patients died of a myocardial infarction at the 14th month of follow-up and 1 of our patients developed left-hemiparesis.CONCLUSION:The study underscores the importance of preoperative planning, surgical expertise, and multidisciplinary teamwork in managing major arterial injuries during EES. The authors advocate for the development of standardized treatment algorithms to improve outcomes in these patients. The findings contribute to the limited literature on managing internal carotid artery injuries in EES, emphasizing the need for ongoing research and algorithm development.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS2OpenAlex4
    Web of SciencePubMedİncele
  • Derleme MakaleAçık Erişim2025Scopus SJRQ2
    Purely endoscopic endonasal resection of extracranial trigeminal schwannomas: a descriptive systematic review and institutional case series

    Yilmaz, Eren; Emengen, Atakan; Uzuner, Ayse; Ozsoy, Bedrettin; Gokbel, Aykut; Anik, Ihsan; Ceylan, Savas

    Background: Trigeminal schwannomas (TSs) are uncommon, benign tumors that arise from the trigeminal nerve. They can spread to the middle cranial fossa, posterior fossa, and extracranially (pterygopalatine fossa (PPF), infratemporal fossa, orbita). Among these, extracranial involvement is the least frequent. Before the advent of endoscopic techniques, these tumors were primarily removed using conventional microsurgical approaches. Due to both the rarity of extracranial localization and the increasing use of endoscopic techniques in suitable cases, reports of TSs with extracranial involvement treated via a purely endoscopic endonasal approach (EEA) remain limited, typically appearing as case reports or a small subset within larger case series. This study systematically reviews the literature on extracranial TSs managed exclusively with EEA and presents two illustrative cases from our institution. Methods: A systematic search of the PubMed database was performed in accordance with PRISMA guidelines to identify studies that utilized a purely EEA for extracranial TS cases. Additionally, a retrospective review of 6118 EEA procedures conducted at our institution identified two patients with histopathologically confirmed extracranial TSs. Clinical presentation, surgical approach, outcomes, and complications were analyzed. Results: A total of 147 records were identified through database searches and reference lists. After removing duplicate records, 144 full-text articles were assessed for eligibility. Of these, 124 studies were excluded with justification, resulting in 23 studies being included in the review. When combined with our institutional cases, data from a total of 52 patients were analyzed. Facial numbness was the most common presenting symptom (70.5 %). The mean tumor diameter was 38.6 +/- 13.3 mm, and the gross total resection rate was 93.1 %. In our cases, both patients successfully underwent tumor resection via EEA without postoperative neurological deficits. Conclusions: EEA provides a direct, minimally invasive route for managing extracranial TSs while reducing the morbidity associated with transcranial approaches. Although optimal for purely extracranial tumors, lesions extending into the middle or posterior fossa may require a combined approach. Therefore, individualized surgical planning is essential for achieving optimal outcomes in TS management.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS1OpenAlex1
    Web of SciencePubMedİncele
  • MakaleYalnız künye2025Scopus SJRQ3
    Pan-immune-inflammation value predicts sustained ventricular arrhythmias in NSTEMI: a novel inflammatory risk marker

    Sahin, Yusuf Bozkurt; Tanik, Veysel Ozan; Koçu, Gokturk Kaan; Özkan, Mehmet Taha; Akdogan, Murat; Seçkin, Ozden; Tunca, Cagatay; Sezgin, Ali; Akbuga, Kursat; Özlek, Bulent

    BackgroundSystemic inflammation contributes to arrhythmogenesis in acute coronary syndromes, but its role in NSTEMI-related ventricular arrhythmias remains poorly defined. The pan-immune-inflammation value (PIV) is a novel composite biomarker reflecting immune and thrombotic activity derived from routine blood counts. This study aimed to assess the association between PIV and the risk of sustained VT/VF in NSTEMI.MethodsIn this retrospective cohort study, 1,788 NSTEMI patients who underwent percutaneous coronary intervention were analyzed. The primary endpoint was the occurrence of sustained VT or VF during hospitalization. PIV was calculated as (neutrophil x platelet x monocyte)/lymphocyte. Logistic regression, ROC analysis, Kaplan - Meier curves, reclassification indices (NRI, IDI), and restricted cubic spline modeling were used.ResultsVT/VF occurred in 34 patients (1.9%). Those with VT/VF had significantly higher PIV values (median 1132 vs. 329, p < 0.001). In multivariable analysis, PIV remained an independent predictor (OR: 1.356 per 1000 unit increase; 95% CI: 1.028-1.787; p = 0.031). The risk of VT/VF rose progressively across PIV quartiles (Q4 vs. Q1 OR: 4.0, p for trend < 0.001). Adding PIV to conventional predictors improved risk classification (NRI: +0.089; IDI: 0.007). Kaplan - Meier analysis showed significantly reduced arrhythmia-free survival in high-PIV tertiles (log-rank p < 0.001), and cubic spline modeling revealed a non-linear association with increased arrhythmic risk at higher PIV levels.ConclusionsElevated PIV is independently associated with malignant ventricular arrhythmias in NSTEMI. As an accessible biomarker, PIV may aid early arrhythmic risk stratification and guide clinical surveillance strategies.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    Web of SciencePubMedİncele
  • MakaleYayıncıda açık erişim2025Scopus SJRQ4
    A new method for the evaluation of cervical dystonia

    Karakaya, Hanife; Colakoglu, Zafer; Acarer, Ahmet; Ozkurt, Ahmet

    Objectives: The study aimed to develop a measurement method that yielded objective data for the clinical assessment of cervical dystonia using a Kinect camera system. Patients and methods: This double-blind, parallel-group method development study included 22 patients with cervical dystonia (3 males, 19 females; mean age: 47 years; range, 34 to 60 years) and 20 healthy individuals (13 females, 7 males; mean age: 32 years; age range, 22 to 65). Using cameras and a computer software, the head-neck postures of 40 healthy participants were recorded in the virtual environment. Using the device, 22 patients with cervical dystonia were examined both at rest and while moving with different parts of the body. Two different experts evaluated and scored the cases using the Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) and the Tsui scale. Results: A three-way comparison revealed interclass correlations between the coefficients of 0.799 (79.9%) and 0.784 (78.4%) for at rest and with movement, respectively. The two-way comparison of the experts revealed correlation coefficients of 0.717 (71.7%) and 0.692 (69.2%) for at rest and with movement, respectively. A three-way comparison of the device and Expert 1 and Expert 2 TWSTRS scores revealed interrater agreement values of 0.6 and 0.8 (good) and 0.6 and 0.8 (good) while at rest and with movement, respectively. A three-way comparison of the device and Expert 1 and Expert 2 Tsui scores revealed interrater agreement values of 0.6 and 0.8 (good) and 0.4 and 0.6 (moderate) while at rest and with movement, respectively. Conclusion: The newly developed system was a sensitive tool for use in the kinematic evaluation of patients with cervical dystonia and could prove beneficial in diagnosis and treatment follow-up.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS1OpenAlex1
    Web of Scienceİncele
  • MakaleAçık Erişim2025
    The Mediating Role of Impulsivity in the Relationship Between Internet Addiction and Eating Disorders: A Study on High School Adolescents

    Bülbül, Kenan; Türkkan, Tugba; Meriç, Cagdas Salih; Yilmaz, Haci Omer

    Eating disorders are a problem that negatively affects physical and psychological development and can potentially be life-threatening. In order to successfully combat this disorder, it is important to have a better understanding of the underlying mechanisms. The aim of this study is to examine the mediating role of impulsivity in the relationship between internet addiction and eating disorders in an adolescent sample. The current research was designed in accordance with the correlational model. The study group was formed by convenience sampling method among students who continue their education in secondary schools and high schools in Trabzon. The data of the study were collected with a demographic information form prepared by the researchers, the Young Internet Addiction Test-Short Form, Rezzy Eating Disorders Scale and Barratt Impulsivity Scale-Short Form. As a result of statistical analysis, it was determined that the average eating disorder score of female students was higher than that of male students. It was found that the eating disorder scores of those whose income was less than their expenses were significantly higher than those whose income was more than their expenses. Positive significant relationships have been identified between internet addiction and eating disorders. It has also been determined that impulsive behavior plays a mediating role in the relationship between internet addiction and eating disorders. It is thought that the current findings will contribute to the understanding of the mechanisms underlying eating disorders and the development of effective prevention and intervention strategies.

    • SDG 2 · Açlığa Son
    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS3OpenAlex3TR Dizin2
    Web of ScienceTR Dizinİncele
  • MakaleAçık Erişim2025
    EFFECT OF TRAPEZIUS MUSCLE THICKNESS ON THE ONE-REPETITION MAXIMUM (1RM) STRENGTH

    Yilmaz, Coskun; Ceylan, Tulay; Altunbas, Adem; Soylu, Hakan Huseyin; Kavuran, Korhan; Söyler, Mehmet

    Purpose: The objective of this study was to examine the impact of trapezius muscle thickness measurements on bench press single repetition maximum (1RM) power output. Material and Methods: The study included 13 male bodybuilders who participated in national and international professional natural bodybuilding competitions and 13 healthy sedentary male subjects. Body composition, 1RM values and ultrasonographic measurements of trapezius muscle thickness were obtained from the participants. Results: The findings revealed that both the skin-to-superficial muscle tissue (R1, L1) and skin-to-deep fascia (R2, L2) distances were significantly lower in sedentary individuals compared to bodybuilders (p<0.001). Additionally, 1RM strength output was significantly higher in bodybuilders than in sedentary individuals. In sedentary individuals, a moderate negative correlation was observed between the distance between superficial muscle and 1RM, and a low positive correlation was observed between the distance between deep fascia and skin surface. In contrast, a low negative correlation was found in both parameters in bodybuilders. Conclusion: Our findings indicate that trapezius muscle thickness is significantly lower in sedentary individuals compared to bodybuilders, both in superficial and deep tissue layers. We believe that the skin surface imaging method used in our study could be an effective tool for predicting injuries in athletes. Additionally, we believe that regular imaging follow-ups in athletes could provide important information about adaptations in muscle structures resulting from applied training stimuli.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS1
    Web of ScienceTR Dizinİncele
  • MakaleAçık Erişim2025Scopus SJRQ2
    EZH2 expression in colorectal carcinoma: an evaluation of clinicopathological and prognostic value

    Cagatay, Diren Vuslat; Balci, Mecdi Gurhan; Issin, Gizem; Demir, Fatih

    BackgroundEnhancer of zeste homolog 2 (EZH2), the catalytic subunit of Polycomb Repressive Complex 2, catalyzes trimethylation of histone H3 lysine 27 and has been implicated in tumor progression.AimOur study aims to assess the relationship between EZH2 expression and clinicopathologic data, and survival in colorectal carcinomas (CRC).Materials and methodsEZH2 immunohistochemistry was performed on tumor blocks from 124 CRC patients. Based on H-scores, cases were stratified into low- and high-expression groups. EZH2 status was correlated with demographic, clinical, and pathologic features, and overall survival was analyzed with the Kaplan-Meier method and log-rank test.ResultsA total of 124 cases of CRC; 12 (9.7%) cases were classified as low EZH2 expression, and 112 (90.3%) cases were classified as high EZH2 expression. A significant association was found between EZH2 expression and microsatellite stability. High EZH2 expression was significantly enriched in microsatellite-stable tumors (p = 0.007) and in left-sided lesions (p = 0.049). No significant associations were detected with sex, stage, grade, lymph-node status, or vascular invasion. Kaplan-Meier analysis revealed no difference in overall survival between low- and high-EZH2 groups (log-rank p = 0.47; hazard ratio = 1.13, 95% CI 0.45-2.85). EZH2 staining was uniformly strong in normal mucosa and adenomas, mirroring the high expression observed in most CRCs.ConclusionsEZH2 is highly expressed across the normal-adenoma-carcinoma sequence and, in our cohort, was not linked to overall survival or to most clinicopathologic parameters in CRC. The lower expression observed in a subset of MSI-H tumors warrants further investigation; present evidence remains insufficient to establish EZH2 as an independent prognostic biomarker.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    Web of Scienceİncele
  • BildiriYalnız künye2025Scopus SJRQ2
    Investigation of antioxidant and antidiabetic activities of propolis obtained from different locations of artvin

    Turan, I.; Gultekin, D. Canbolat; Akmese, O.; Gultekin, E.; Demir, S.; Aliyazicioglu, Y.

    Web of Scienceİncele
  • MakaleYalnız künye2025
    THE IMPACT OF UNCERTAINTY IN GLOBAL GOLD AND OIL PRICES ON STOCK MARKET INDEX RETURNS: THE CASE OF THE MIST COUNTRIES

    Pala, Fahrettin; Görgün, Mehmet Ragip; Torusdag, Mustafa; Demirtas, Furkan; Barut, Abdulkadir

    The current study explores the impact of global gold price uncertainty on the stock markets of the MIST countries: Mexico, Indonesia, South Korea, and T & uuml;rkiye. The study examined the crisis periods that started with the COVID-19 pandemic and continued with the Russia-Ukraine war, which caused uncertainty in gold and oil prices. Based on this, the study's data set consists of the daily closing prices between March 11th, 2020, and January 31st, 2023. The obtained data were analyzed using the Least Squares (ICC) and panel quantile regression (PQR) methods. There is a significant positive correlation between oil prices and oil volatility index with stock prices for the economies of T & uuml;rkiye, Indonesia, and Mexico, and a significant negative correlation between gold prices and gold volatility index with stock prices for developing countries. There is also a significant positive relationship between gold and oil prices and stock prices for the developed country, South Korea's economy. A significant negative correlation has also been proposed between gold and oil volatility indices and South Korean stock prices. This study provides a novel contribution to the literature by examining the impact of simultaneous global crises namely the COVID-19 pandemic and the Russia-Ukraine war-on the stock market indices of MIST countries through the lens of uncertainty in both gold and oil markets. While most existing studies focus on a single commodity or analyze crises in isolation, this research distinguishes itself by investigating the combined effects of two major global shocks and incorporating both price and volatility-based uncertainty indicators. The findings suggest that policymakers should develop country-specific and differentiated financial stability policies by taking into account the uncertainties in gold and oil markets during crisis periods.

    Web of ScienceTR Dizinİncele
  • MakaleAçık Erişim2025
    THREE NEW RECORDS OF MOSSES FROM AZERBAIJAN

    Erata, Hueseyin; Koeroglu, Zeynep gizem; Mammadova, Aygun vidadi; Ibadullayeva, Sayyara; Batan, Nevzaat; Sadigova, Narmin

    Splachnum ampullaceum Hedw., Sphagnum capillifolium (Ehrh.) Hedw., and Plagiothecium cavifolium (Brid.) Z. Iwats. have been reported as new for Azerbaijan, following a recent bryological expedition to the Tugay forest and Dilman forest of Azerbaijan. Of these, Splachnum has been recorded as new genus record for bryophyte flora of Azerbaijan. Brief descriptions, illustrations, geographic distribution, ecology and comparisons with morphologically similar species are presented.

    AtıfWoS2OpenAlex1
    Web of Scienceİncele
  • MakaleAçık Erişim2025Scopus SJRQ1
    Analyzing the impact of economic growth and FDI on sustainable development goals in China: insights from ecological footprints and load capacity factors

    Güler, Ilkay; Naimoglu, Mustafa; Simsek, Orhan; Adali, Zafer; Özbek, Sefa

    This study investigates the impact of economic growth and foreign direct investment (FDI) on China's sustainable development goals (SDGs), specifically Zero Hunger (SDG 2), Life Below Water (SDG 14), and Life on Land (SDG 15). It examines ecological footprints and load capacity factors (LCFs) in cropland, fishing, forest, and grazing land using Fourier bootstrap autoregressive distributed lag (ARDL) cointegration analysis and fully modified ordinary least squares (FMOLS) estimators. The study covers the period from 1979 to 2022. Key findings reveal that while GDP and FDI often exacerbate environmental degradation, urbanization and value-added agriculture, forestry, and fishing (FAFGDP) improve sustainability in some areas. The study confirms the pollution haven hypothesis for most models, suggesting that China's legal and regulatory frameworks may inadequately mitigate FDI's adverse environmental effects. The Environmental Kuznets Curve (EKC) hypothesis is not supported as GDP growth generally increases ecological footprints. However, trade openness and urbanization show positive influences on environmental sustainability. Policy recommendations include enhancing energy efficiency, promoting renewable energy, implementing green technologies in agriculture and urban development, and revising FDI policies to incentivize environmentally friendly practices. These strategies are crucial for achieving China's sustainable development goals and mitigating the pressures of human activities on natural resources.

    • SDG 8 · İnsana Yakışır İş ve Ekonomik Büyüme
    • SDG 13 · İklim Eylemi
    AtıfWoS23OpenAlex27
    Web of Scienceİncele
  • MakaleAçık Erişim2025
    Investigation of Physical and Cognitive Performance of Athletes

    Çeviker, Abdulkerim; Turgut, Abdusselam; Zambak, Omer; Yanar, Muhammed Said; Çamiçi, Furkan; Ünlil, Cisem; Eroglu, Seref

    This study aims to examine the relationship between physical performance levels and cognitive functions of male athletes aged 18-25 years competing in the Turkish Hockey Indoor 1st League. 45 athletes participated in the study, balance, flexibility and vertical jump tests and D2 Attention Test were applied. In addition to descriptive statistics, independent samples t-test, one-way analysis of variance (ANOVA) and Pearson correlation analysis were used to analyze the data. The results revealed that attention levels did not differ significantly according to age, education, sport experience and position (p>0.05). While there was no significant relationship between physical performance variables and attention, only vertical jump values showed a significant difference between the positions (p<0.05). In addition, positive and significant correlations were observed between the sub-dimensions of the attention test. In this context, it was concluded that not only physical criteria but also cognitive skills should be systematically included in the performance evaluations of hockey athletes.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfOpenAlex2
    Web of Scienceİncele
  • BildiriYalnız künye2025Scopus SJRQ2
    Investigation of antioxidant and antidiabetic activities of different extracts of Vitis labrusca fruit peels

    Güntekin, D. Canbolat; Akmese, O.; Gültekin, E.; Bak, F. Ersen; Özkan, A. I.; Turan, I.; Demir, S.; Aliyazicioglu, Y.

    Web of Scienceİncele