Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Güler, Ömer(22)
- ALMisned, Ghada(15)
- Tekin, H.O.(15)
- Kök, Mediha(11)
- Güler, Seval Hale(10)
- Özkul, İskender(10)
- Aglar, Erdal(9)
- Aslan, Alper(7)
- Durmus, Hasan(7)
- Erten, Fusun(7)
- Orhan, Cemal(7)
- Yeşiltepe, Akgün(7)
- Baykal, Duygu Sen(6)
- Gul, Muhammet(6)
- Karataş, Mehmet(6)
- Sahin, Kazim(6)
- Sen Baykal, Duygu(6)
- Serdar, Osman(6)
- Taşgın, Yahya(6)
- Tuğan, Volkan(6)
- Acar, Ramazan(5)
- Macit, Arife(5)
- Ozturk, Burhan(5)
- Utku, Anil(5)
- Yılmaz, Demet(5)
- Çelik, Yusuf(5)
- Özyurt, Özcan(5)
- Şahin, Aykut(5)
- Almisned, Ghada(4)
- Aslan, Naim(4)
- Benzer, Fulya(4)
- Doğan, Fatih(4)
- Er, Besir(4)
- Gundogdu, Muttalip(4)
- Ilik, E.(4)
- Kanca, M. Sait(4)
- Karaduman, Oktay(4)
- Kavaz, E.(4)
- Kocabaş, Filiz Kutluyer(4)
- Kocabaş, Mehmet(4)
Yayınlar
- MakaleAçık Erişim2026Scopus SJRQ2A Unified and Interpretable Benchmark of Classification Models for DGA-Based Power Transformer Fault Diagnosis
Doğan, Kıvanç; Ertarğın, Merve; Çalışkan, Abuzer; Bakay, Ayşenur
Power transformers are among the most critical components of electric power transmission and distribution systems, and unexpected failures can lead to substantial economic losses and prolonged power outages. Dissolved Gas Analysis (DGA) is the most widely used diagnostic technique for transformer fault diagnosis and involves interpreting gases dissolved in insulating oil. However, conventional interpretation methods, such as the Rogers ratio, the Doernenburg ratio, the IEC 60599 ratio method, and the Duval Triangle, rely heavily on expert knowledge, may produce inconsistent diagnoses for the same oil sample, and may fail to provide a diagnosis in certain cases. In this study, 12 classification models were evaluated using the publicly available Power Transformers Fault Detection and Diagnosis (FDD) and Remaining Useful Life (RUL) dataset and a unified evaluation protocol. Model performance was assessed using Accuracy, Balanced Accuracy, and Macro-F1 score, while model interpretability was investigated through Shapley Additive Explanations (SHAP) analysis. The results showed that ensemble tree-based methods achieved the best overall performance. LightGBM and Random Forest both attained an Accuracy of 0.969 and a Macro-F1 score of 0.924, while LightGBM further achieved the highest Balanced Accuracy of 0.940. XGBoost exhibited the most stable performance under cross-validation. SHAP analysis revealed that engineered relative concentration features, particularly the CO/H2 ratio and the combined gas ratio, were among the most influential features for fault classification. These findings demonstrate that, for datasets of this scale, ensemble tree-based models combined with well-designed features provide strong and interpretable performance for imbalanced DGA-based fault diagnosis, highlighting the effectiveness of feature-based ensemble learning for small- to medium-sized datasets.
- MakaleAçık Erişim2026Scopus SJRQ1Biochemical and Nutritional Profiling of Pistachio Genotypes Grafted Onto Pistacia khinjuk Rootstocks
Aglar, Erdal; Ozturk, Burhan; Uyak, Cuneyt; Dogan, Adnan; Tekin, Onur; Durmaz, Orhan; Alan, Davut; Ates, Umut
In the 2023 study, conducted in the Hizan District of Bitlis, aimed at determining the biochemical properties of pistachio trees grafted onto Pistacia khinjuk rootstocks, we identified 11 genotypes. Approximately 500 g of fruit were harvested from each genotype when the green fruit peel color started turning red, for use in the analyses. The various parameters were measured in the harvested fruits, including fruit size, yield, percentage of empty fruits, number of fruits per 100 g, splitting rate, moisture, ash, protein, fat, and mineral content. The fruit analyses revealed significant differences among the genotypes. The largest fruits were found in the G5 genotype, while the smallest were in the G9 genotype. Regarding yield, the highest ratio was observed in the G6 genotype with 46.63%, while the lowest was in the G10 genotype with 13.44%. The splitting rate, which varied by genotype, ranged between 0.97% and 41.88%. No statistical differences were observed in moisture and ash content among the genotypes, but protein content ranged from 18.01% to 28.49%, with the highest protein percentage recorded in the G9 genotype at 28.49%. Nutrient element analysis identified nitrogen (N), magnesium (Mg), calcium (Ca), and potassium (K) in the fruits. K emerged as the most abundant nutrient element across genotypes, followed by CA, magnesium (Mg), and sodium (Na). The G3 genotype exhibited the highest levels of potassium, calcium, magnesium, and manganese. In the fatty acid analyses, 9-octadecenoic acid was found to be the most abundant fatty acid, ranging between 40.5% and 66.7% across genotypes. Additionally, other fatty acids such as hexadecanoic acid, 9,12-octadecadienoic acid, and eicosanoic acid were also detected. These results indicated significant differences in the fatty acid content of the genotypes. As a result the pistachio genotypes examined in this study showed notable differences in terms of fruit yield, quality characteristics, and nutritional values. Particularly, G6 and G9 genotypes stood out with high yield and superior fruit qualities.
- MakaleAçık Erişim2026Scopus SJRQ1Sustainable hybrid activation: Synergistic effects and optimization of one-part alkali-activated slag using sodium sulfate and sodium carbonate
Orhan, Taha Yusuf; Balun, Bilal; Dener, Murat; Karataş, Mehmet
The development of one-part alkali-activated materials (AAMs) using near-neutral and moderately alkaline salts offers a promising, low-carbon alternative to hazardous two-part systems. However, overcoming delayed reaction kinetics and setting anomalies remains a critical challenge. This study systematically investigates the fresh state, mechanical, and microstructural evolution of one-part slag mortars activated by sodium sulfate (Na2SO4), sodium carbonate (Na2CO3), and their hybrid combinations, adopting a hybrid binder approach through modification with calcium-rich additives (Portland cement, hydrated lime, and quicklime). Results demonstrate that while Portland cement ensures a controlled dissolution rate and balanced setting times across all environments, the incorporation of 7.5% quicklime in pure carbonate media triggers an instantaneous flash set. This extreme reactivity leads to a severe structural collapse, plunging the 90-day compressive strength to 16.11 MPa. Microstructural analyses (TGA and FTIR) suggest a link between this mechanical failure and a massive accumulation of unreacted portlandite (4.51% mass loss) rather than cohesive C-(A)-S-H gel formation, a degradation further corroborated by a drastic attenuation in ultrasonic pulse velocity (UPV). Conversely, the synergistic implementation of hybrid sulfate-carbonate activators effectively mitigates these anomalies. Sulfate ions buffer early-age kinetics to prevent flash setting-recovering the collapsed strength up to 29.16 MPa while carbonate ions facilitate sustained late-age matrix densification. Ultimately, tailoring specific calcium boosters within a hybrid activator framework presents a highly robust and potentially low-carbon framework for developing sustainable binders for practical on-site construction applications.
AtıfScopus3WoS2OpenAlex2
İncele - MakaleAçık Erişim2026Scopus SJRQ2The Female Face of the Digital World: From Cooperatives to Global Financial Freedom
Veysikarani Geyik, Dilek; Akdağ, Nuran; Malkoç Kinikli, Filiz
The objective of this study is to examine, through a narrative literature review and a qualitative cross-case comparison, how women’s cooperatives and cooperative-linked financial mechanisms contribute to women’s financial inclusion and economic empowerment under different institutional and socioeconomic conditions. The study synthesizes evidence from successful initiatives, including the Self-Employed Women’s Association (SEWA) in India, digital savings cooperatives in Indonesia, and M-Pesa-enabled cooperative models in Kenya, women-oriented banking in Rwanda, Cooperative Home Care Associates in the United States, and women’s cooperatives in Türkiye. The findings indicate that cooperative systems enhance women’s access to financial services, strengthen financial and digital capabilities, support income generation, and foster leadership and economic participation. However, persistent barriers, including limited digital access, inadequate financial literacy, and restrictive socio-cultural norms, continue to constrain the effectiveness and scalability of these models. The study concludes that strengthening women’s cooperatives through targeted policy support, capacity-building initiatives, and digital financial inclusion strategies can significantly improve women’s economic empowerment while contributing to more inclusive financial systems and broader sustainable development objectives.
- MakaleAçık Erişim2026Scopus SJRQ1Structural alignment and thematic complementarity between ISO 7101:2023 and Türkiye’s hospital quality standards: a qualitative document analysis
Karahüseyinoğlu, Furkan
Background: ISO 7101:2023, adopted in Türkiye as TS ISO 7101:2023, is an international management system standard for healthcare quality management published by the International Organization for Standardization (ISO) in October 2023 and structured according to ISO’s harmonised high-level architecture. SKS Hastane Sürüm 6.1 (Sağlıkta Kalite Standartları Hastane Sürüm 6.1) is Türkiye’s national hospital quality standards framework, comprising 5 dimensions, 46 sections, 523 standards, and 1,599 assessment criteria calibrated to hospital practice. Both documents coexisted within the Turkish health system at the time of this analysis: TS ISO 7101:2023 was adopted by the Turkish Standards Institution (TSE) in November 2023, while SKS Hastane Sürüm 6.1 has been in use since its publication in 2021. Despite the potential relevance of both frameworks to hospital quality governance, to the author’s knowledge, no published study has systematically compared the structural and thematic alignment of ISO 7101:2023 and SKS Hastane Sürüm 6.1. This study aimed to examine the degree and nature of correspondence between ISO 7101:2023 and SKS Hastane Sürüm 6.1 across a comprehensive set of hospital quality management domains. Methods: A qualitative document analysis with structured comparative mapping was conducted using the primary texts of ISO 7101:2023 (accessed as TS ISO 7101:2023) and SKS Hastane Sürüm 6.1. Fourteen analytical dimensions were specified a priori, covering organisational context, leadership and governance, quality planning, patient/person-centred care, patient safety and risk management, workforce competence, clinical and service delivery processes, information management, resource and infrastructure management, external provider management, performance measurement, incident reporting and learning, continuous improvement, and accessibility and equity. A seven-category coding scheme was applied to each dimension: Full Convergence (FC), Partial Convergence (PC), ISO-Dominant Management System Emphasis (ISO-D), SKS-Dominant Operational Specificity (SKS-D), Complementarity (COMP), Limited Explicit Correspondence (LEC), and No Direct Correspondence (NDC). Coding categories are analytical, not evaluative. Standard-level verification extending to confirmed standard codes and assessment-criteria-level content was conducted for five dimensions (D2, D3, D5, D8, D11). ISO 7101:2023 text is paraphrased with clause references; the document is copyrighted and is not extensively quoted. Results: Thirteen of the fourteen analytical dimensions were classified as Partial Convergence (PC). Dimension 7 (Clinical and Service Delivery Processes) was classified as Complementarity (COMP). No dimension was classified as Full Convergence or No Direct Correspondence. The Partial Convergence pattern reflects shared quality management intent across all domains, accompanied by systematic differences in documentary logic, prescriptive specificity, and regulatory mechanism. ISO 7101:2023 addresses quality domains through normative “shall” obligations within a harmonised management system architecture, leaving implementation methods to the organisation. SKS Hastane Sürüm 6.1 addresses the same domains through prescriptive, surveyable hospital standards and assessment criteria. Standard-level verification confirmed operationally specific requirements in SKS across governance committee structures (KKY06-10), risk management (KRY01-05), patient safety (KKY07), information system security and backup (DBY05, DBY10, DBY13), indicator management (GGİ01–07), and national performance reporting. Several ISO constructs — including formal change management planning (Cl. 6.3), risk awareness culture monitoring (Cl. 6.1.2), structured internal audit with independence criteria (Cl. 9.2), and eleven-input management review (Cl. 9.3) — were not confirmed as single equivalent standards in the verified SKS sections. Conclusions: ISO 7101:2023 and SKS Hastane Sürüm 6.1 show broad thematic overlap across hospital quality domains. SKS Hastane Sürüm 6.1 provides an operationally specific, nationally calibrated quality infrastructure for hospitals in Türkiye. ISO 7101:2023 provides a complementary management-system architecture that may supplement SKS’s operational standards with structural constructs for leadership accountability, quality objective documentation, change management planning, and cyclical system evaluation. The two frameworks are better characterised as potentially complementary than as competing. These findings are based on document-level analysis and cannot be interpreted as evidence of implementation effectiveness. Empirical research is needed to assess how the frameworks interact in hospital practice and to determine what benefits, if any, alignment may offer for hospital quality governance in Türkiye.
- MakaleYayıncıda açık erişim2026Scopus SJRQ2Digital Mourning After Femicide: A Netnographic Study of Social Responses in Turkey
Karatay, Gülnaz
This study examines the construction of collective mourning and social memory in digital environments following the discovery of university student Ayşe Tokyaz’s body in a suitcase, using a netnographic approach. Femicide is framed as a form of structural violence that produces societal trauma. A total of 414 online comments from Haberler.com were reviewed; 226 met the inclusion criteria, and 205 were analyzed after data cleaning. An integrated qualitative method combining thematic analysis, manual sentiment coding, and discourse analysis was employed. Findings highlight strong demands for justice and capital punishment, alongside distrust in the legal system and calls for retribution. Patriarchal norms appear in victim-blaming and sexist discourse, while demands to reveal the perpetrator’s identity reflect “digital justice.” Collective mourning is expressed through empathy and shared grief, whereas fear signals ongoing trauma. Some users invoke religious references. As a single-case study, findings are context-specific.
- MakaleYalnız künye2026Scopus SJRQ2Linking microstructural modifications of Ho2O3-doped borotellurite glasses to the enhancement of critical properties: Synthesis, structural, physical, and experimental Gamma-Ray and neutron transmissioncharacteristics
Kilic, G.; Ilik, E.; Kavaz, E.; Durmus, Hasan; Güler, Ömer; Birdogan, Selcuk; ALMisned, Ghada; Tekin, H.O.
This study investigates the effects of holmium oxide (Ho2O3) microparticle reinforcement on the structural, physical, and radiation shielding properties of borotellurite glasses with compositions ranging from 0 to 12 mol% Ho2O3. X-ray diffraction and TEM analyses confirmed the retention of amorphous structure across all samples, with localized short-range ordering observed at higher Ho contents. Glass density increased from 4.598 to 5.202 g/cm3 with increasing Ho2O3, while molar volume expanded from 27.94 to 30.61 cm3/mol, and oxygen packing density decreased from 0.605 to 0.551 g/cm3, indicating network expansion due to the substitution of lighter Li + ions by heavier Ho3+. Gamma-ray shielding properties significantly improved with Ho incorporation. At 81 keV, the linear attenuation coefficient increased from 8.33 to 13.70 cm−1, and the mass attenuation coefficient improved from 2.066 to 2.735 cm2/g. Moreover, effective atomic number rose from 44.9 to 52.5 and half-value layer decreased by 20.5% at 383 keV, and buildup factors dropped by up to 34% at 0.5 MeV. Neutron dose absorption improved, and the fast neutron removal cross-section increased from 0.1066 to 0.1113 cm−1. These results confirm that Ho2O3 contributes as a highly effective multifunctional dopant, significantly enhancing both gamma-ray and neutron shielding performance of borotellurite glasses, one of the most promising glass systems for advanced radiation protection applications.
AtıfScopus1OpenAlex1İncele - MakaleYalnız künye2026Scopus SJRQ2Development and Characterization of Starch/Microcrystalline Cellulose/Bentonite Intelligent Packaging Films Incorporated With Red Beet Peel Extract for Monitoring Chicken Freshness
Gürler, Nedim
This study presents the physical, mechanical, antioxidant, and application properties of films prepared by adding red beet peel extract to the starch/microcrystalline cellulose/bentonite clay polymer composites by casting method to monitor chicken breast freshness. The effects of bentonite in different proportions (0%, 1%, 5%, and 10%) were investigated. The structure of the films was elucidated by XRD, FTIR spectroscopy, and SEM for surface morphology of films. Regarding mechanical testing, the highest tensile strength starch/microcrystalline cellulose-1% bentonite film was 0.88 MPa. It was noticed that water vapor permeability (WVP) improved with the addition of bentonite. Films containing 10% bentonite clay showed a 27% decrease in water vapor permeability compared to films without clay. However, the swelling power of composites increased as the bentonite content increased. Additionally, with the addition of clay the films exhibited more opaque properties. Red beet peel extract was also incorporated to the polymer composite to monitor chicken breast freshness. The antioxidant properties of the films were accomplished using DPPH method. When red beet peel extract was incorporated into the polymer film, the highest DPPH scavenging activity increased by 50%. In summary, starch/microcrystalline cellulose/bentonite films can be used as pH-sensitive intelligent packaging for controlling the freshness of chicken breast.
- MakaleYalnız künye2026Scopus SJRQ1Analysis of the impact of the social justice index on the COVID-19 pandemic using artificial intelligence in EU and OECD countries
Utku, Anıl; Can, Ümit; BARUT, Abdulkadir; Pilatin, Abdulmuttalip; Sharabati, Abdel-Aziz Ahmad
The COVID-19 disease has evolved into a pandemic that affects the world in multiple dimensions. While COVID-19 spread rapidly to several nations, distinct patterns of spread emerged in each nation. This spreading behavior is related to various characteristics of countries, including social, political, and economic factors. In this study, an analysis of the COVID-19 pandemic in EU and OECD countries was conducted, taking into account the social justice index for the first time. The impact and significance of the social justice index on the COVID-19 analysis results were attempted to be revealed. As a result, it is understood that the countries with high Social Justice Index scores and sub-dimension scores are more successful in combating the COVID-19 pandemic. In addition, a new LSTM-based model was developed to predict the number of cases and deaths in these countries. The designed LSTM approach was compared with some well-known deep learning and machine learning algorithms. As a result of the experimental studies, the LSTM model obtained the best prediction results. Finally, the similarities between these countries in terms of the characteristics of the COVID-19 pandemic, including death and case spread, were analyzed, and exciting results were disclosed.
- MakaleAçık Erişim2026Scopus SJRQ1Health risk assessment of heavy metal accumulation in fruits exposed to geothermal waters: a case study and global implications
Arslan Topal, E Işıl; Topal, Murat; Çelik, Erdal; Öbek, Erdal
BACKGROUND: The present study investigated the potential health risks of heavy metals (HMs) in the fruits and leaves of mulberry and sour cherry trees exposed to water from Sivas geothermal basin (Turkey). RESULTS: The target HMs were ranked according to their hazard index as: Cd < Pb < Zn < Cu < Ni < Mn < Cr. The total hazard index for mulberry and sour cherry fruits was calculated as 7.87 and 4.57, respectively, and was determined to be well above the safe threshold value of 1.0. At the same time, the calculated cancer risk values exceeded the established maximum limit (1.0 × 10−4) for Ni (6.4 × 10−3) in mulberry fruit and for Cr (1.15 × 10−3) in sour cherry fruit. Ingestion has been identified as the primary route of exposure. The study results showed that Cr and Ni metals were ranked in the order of mulberry fruit > sour cherry fruit > mulberry leaf > sour cherry leaf, and that for mulberry and sour cherry fruit. CONCLUSION: The findings indicate that edible foods exposed to geothermal waters may have adverse effects on human health. Furthermore, the study highlights the necessity of reducing water discharges from geothermal fields and implementing phytoremediation strategies to ensure food safety in geothermally active agricultural basins.
- MakaleYalnız künye2026Scopus SJRQ1‘I want to play too’: exploring the experiences of students with disabilities in inclusive physical education
Şahin, Aykut; Karakaya, Yunus Emre
Although physical education (PE) classes are recognized as a critical setting for students with special needs (SSN) to develop physical literacy and social belonging, practices in integrated settings often fall short of this potential. In this study we utilized Interpretative Phenomenological Analysis (IPA), to understand the lived experiences of SSN students participating in integrated PE classes in Turkish middle and high schools and to question inclusivity claims through the lens of ‘student voice’. The study group consisted of 31 students with special needs (visual, hearing, orthopedic, and neurological), selected through purposive sampling. Data were collected through semi-structured interviews. The results revealed that despite a strong desire to ‘be included in the game’, students experienced a profound ‘inclusion illusion’. Findings were grouped under five themes: (1) Emotional meanings attributed to the physical education class, (2) The dual nature of experienced realities, (3) Spatial injustice and tokenism, (4) Teacher competence, (5) The ideal physical education teacher. Our findings suggest that current inclusion policies focus on spatial integration (physical placement) but fail to create a sense of legitimate participation and belonging. To address these systemic gaps, we recommend that Turkish policy makers and educators transition toward a social justice-focused pedagogy that positions students as ‘experiential experts’ in lesson co-design, ensuring that physical education moves beyond mere physical placement to achieve legitimate qualitative inclusion.
- MakaleYalnız künye2026Scopus SJRQ1Boron source–dependent regulation of bone mineralization and osteogenic molecular pathways in broilers with tibial dyschondroplasia
Orhan, Cemal; Sahin, Emre; Erten, Fusun; Er, Besir; Sahin, Nurhan; Ozercan, Ibrahim Hanifi; Kom, Mustafa; Akdemir, Fatih; Balci, Tansel Ansal; Denli, Muzaffer
Rapid genetic selection for growth rate and slaughter weight in broilers has been associated with a higher incidence of skeletal disorders, particularly tibial dyschondroplasia (TD), which causes considerable economic losses in poultry production. We investigated the effects of boric acid (BA) and sodium pentaborate pentahydrate (SPP) on growth performance, bone mineralization, tibial histopathology, and osteogenic protein expression in broilers with manganese (Mn) deficiency-induced TD. A total of 360 Ross 308 broiler chicks were used in a 2 × 2 × 3 factorial design with TD status (normal or Mn deficiency–induced TD), boron source (BA or SPP), and supplemental boron level (0, 4.37, and 8.74 mg elemental B/kg diet). Birds were randomly allocated to 12 groups with six replicates of five birds each. Clinical and histopathological findings confirmed TD induction. TD decreased body weight, feed intake, and carcass weight, while increasing feed conversion ratio (p < 0.05). Boron supplementation improved tibial mineral density and content in a dose-dependent manner (p < 0.05). In TD broilers, serum osteocalcin (OCN) concentrations were higher with high-level SPP supplementation than with BA supplementation (p = 0.012). Boron source and level significantly affected serum and bone boron concentrations, bone calcium concentrations (p < 0.05). In TD broilers, tibial osteoprotegerin levels were markedly elevated in the high-level SPP group (p < 0.001), whereas SRY-box transcription factor 9, hypoxia-inducible factor-1α, and tumor necrosis factor-α were reduced (p < 0.05). These findings indicate that SPP exerts regulatory effects on bone metabolism and osteogenic signaling pathways in TD-affected broilers.
- MakaleAçık Erişim2026Scopus SJRQ1Short-term effects of powerlifting-based training on hormonal, metabolic, and lipid profile markers in male basketball players: a randomized controlled trial
Tizar, Ercan; Erdoğan, Ramazan
Background: Powerlifting-based resistance training is increasingly incorporated into athletic conditioning programs; however, its short-term endocrine and metabolic responses remain insufficiently explored. Therefore, this study aimed to examine the short-term, exercise-induced changes associated with a powerlifting-based training program on selected hormonal, metabolic, and lipid profile parameters in male basketball players. Methods: This randomized controlled experimental study was conducted in accordance with CONSORT guidelines. Thirty male basketball players aged 18–24 years were randomly assigned to an exercise group (EG; n = 15) or a control group (CG; n = 15). Both groups continued their routine basketball training three days per week for six weeks, while the EG additionally performed a powerlifting-based training program. Serum concentrations of thyroid hormones (TSH, T3, and T4), insulin, glucose, growth hormone, testosterone, and lipid profile parameters were assessed before and after the intervention. Data were analyzed using two-way repeated-measures analysis of variance to evaluate group × time interactions. Results: Significant group × time interactions were observed for several biochemical parameters (p < 0.05). In the exercise group, insulin levels increased by 53.31%, while pre-exercise glucose levels under standardized conditions decreased by 14.46%. Thyroid hormones (TSH, T3, T4) increased by 45.26%, 18.85%, and 18.25%, respectively. Growth hormone and testosterone levels increased by 28.49% and 18.22%, respectively. In contrast, total cholesterol, LDL cholesterol, and triglyceride levels decreased by 2.49%, 4.28%, and 3.76%, respectively, while HDL cholesterol increased by 5.63%. No significant changes were observed in the control group. Effect size analyses indicated large interaction effects for key variables (e.g., insulin ηp² = 0.749; glucose ηp² = 0.757). The concurrent increase in insulin and decrease in glucose may reflect transient alterations in glucose–insulin dynamics rather than a direct improvement in insulin sensitivity. Conclusion: The inclusion of a powerlifting-based training program was associated with favorable short-term, exercise-induced changes in selected hormonal, metabolic, and lipid profile parameters in male basketball players. However, these findings should be interpreted with caution due to the limited sample size and intervention duration. Further studies employing larger cohorts and longer training periods are warranted to confirm these observations and to clarify their long-term physiological implications. Trial registration: ClinicalTrials.gov (NCT07398248), registered on 29/12/2025.
- MakaleAçık Erişim2026Scopus SJRQ1Analyzing Failures In Wind–Solar Hybrid Energy Systems Using a Fuzzy-Based BWM-MARCOS Approach: Challenges and Solutions
Başhan, Veysi; Yucesan, Melih; Demirel, Hakan; Gul, Muhammet
The reliability of hybrid renewable energy systems (HRES) depends heavily on the identification and management of potential failure modes. This study employs a fuzzy-based BWM-MARCOS approach to systematically analyze and prioritize failure modes within wind–solar hybrid systems. The model aims to prioritize the failures considering four important risk parameters: (1) severity of the failure on system, staff, and failure, (2) failure occurrence chance, (3) effort and ease of detecting the cause of the failure, and (4) economic impact of the failure. In this context, four key risk indicators were evaluated to rank failures, revealing that SP1 (cell damage), ESS1 (battery degradation), and WT11 (battery fire) are the most critical due to their potential impact on system operations. Sensitivity analysis confirmed the stability of these rankings under varying parameter weights. Additionally, cross-method validation using fuzzy TOPSIS, SAW, and MARCOS demonstrated high correlation coefficients, underscoring the reliability of the results. Tailored mitigation strategies, including advanced diagnostics, durable materials, and robust monitoring systems, are proposed to address these critical failures. While the current methodology applies to various HRES configurations, future research should incorporate real-world operational data and machine learning techniques to enhance predictive capabilities and dynamic risk management.
AtıfScopus7WoS7OpenAlex8İncele - MakaleYalnız künye2026Scopus SJRQ2Kinetic investigation on the recovery of copper and cobalt from sulphuric acid plant electrofilter dust
Erust, Ceren
Several waste dusts collecting equipment options are available for air pollution control in plants, the most commonly used being the electrofilter. Industrial wastes such as electrofilter dust are evaluated as a secondary resource owing to their critical metal contents. In this work, the results of studies on the extraction of cobalt and copper from electrofilter dust generated in sulphuric acid production plants are presented. The chemical and mineralogical compositions of the dust were investigated using instrumental analytical methods. The electrofilter dust consists of the main phases of haematite, quartz, and anhydrite. Also, electrofilter dust contains 1.43% copper and 0.28% cobalt. It was found that the process of copper and cobalt dissolution is characterized by chemical kinetics. When the acid leaching was applied in 1 M sulphuric acid in the presence of 0.05 M hydrogen peroxide, with the temperature 80°C and 2 h of leaching time, stirring rate of 200 rpm and liquid to solid ratio 20/1 v/w, cobalt and copper extraction achieved 88% and 98% respectively. As a result of studying the kinetics of acid leaching with sulphuric acid in the presence of oxidant hydrogen peroxide, activation energy and the type of reaction to chemical controlled model were determined.
AtıfScopus2WoS2OpenAlex1İncele - MakaleYalnız künye2026Scopus SJRQ2Stratigraphy, mineralogy, paleodepositional environment, and diagenetic evolution of the Pülümür evaporites (Tunceli, Eastern Anatolia, Türkiye)
Us, Muhammed Sami
The gypsum member of the Balpayam Formation (GMoBF) in the Pülümür Kırmızıköprü Basin (PKB), Eastern Anatolia, records a complex evaporitic system shaped by episodic tectonism, volcanism, and fluctuating hydrological conditions. Stratigraphic logging, facies analysis, and systematic sampling from outcrops and quarries enabled a detailed assessment of the evaporite succession. Petrographic data reveal pervasive secondary gypsum textures, including porphyroblastic, alabastrine, laminated, brecciated, and satin-spar fabrics preserving relics of primary anhydrite and calcite. XRD and FIB-SEM-EDS analyses identify gypsum, anhydrite, celestine, dolomite, calcite, clay minerals, and minor siliciclastic, clarifying diagenetic pathways. Diagenesis initiated with early calcite and aragonite precipitation, followed by replacement by primary anhydrite and gypsum under elevated Mg2+/Ca2+ ratios and shallow burial. Later hydration, dehydration, and rehydration cycles produced secondary gypsum with distinctive microtextures and micro-hydration channels. The PKB reflects a dual depositional system: a shallow, low-energy, restricted lagoon dominated by massive-laminated gypsum, stromatolitic textures, and organic-rich layers, and a comparatively deeper open marine setting with laminated-banded gypsum and transported gypsum arenite-rudite facies. Chicken-wire gypsum and anhydrite nodules indicate synsedimentary to early diagenetic formation under hypersaline conditions. A schematic depositional model constrains the temporal and spatial evolution of diagenetic processes, highlighting the interaction among evaporite deposition, tectonic activity, and environmental fluctuations in the southern Neo-Tethys Ocean of Eastern Anatolia.
- MakaleAçık Erişim2026Scopus SJRQ1Evaluation of electrical properties of poly(NIPA-co-St) composites containing neodymium and yttrium
Cetinkaya, Ebru; Karaaslan Ayhan, Nagihan; Torgut, Gulben
In this study, firstly, to obtain neodymium (Nd) and yttrium (Y)-containing composite materials, poly(N-isopropylacrylamide-copolymer-styrene) (poly(NIPA-co-St)) copolymer was synthesized by free radical polymerization method using N-isopropylacrylamide (NIPA) and styrene (St) monomers. Secondly, new composite materials were obtained by adding neodymium and yttrium to this copolymer at different weight ratios (10% and 20%). Structural and morphological characterizations of poly(NIPA-co-St) copolymer, poly(NIPA-co-St)-10%Nd, poly(NIPA-co-St)-20%Nd, poly(NIPA-co-St)-10%Y and poly(NIPA-co-St)-20%Y composite materials were carried out. The electrical properties of the copolymer and composite materials were evaluated by considering the frequency dependence of the dielectric constant (έ), dielectric loss (ε″) and electrical conductivity (σac) properties. At 100 Hz, the έ, ε″, and σac values of the copolymer were 5.12, 0.05, and 2.29 × 10−10 S/cm, respectively. With the addition of 10% Nd, the έ, ε″, and σac values at 100 Hz were calculated as 6.57, 0.10, and 1.79 × 10−9 S/cm, respectively, while with the addition of 20% Nd, these values were calculated as 8.39, 0.15, and 4.78 × 10−8 S/cm at 100 Hz. With the addition of 10% Y, the έ, ε″, and σac values at 100 Hz were calculated as 6.56, 0.053, and 1.81 × 10−9 S/cm, respectively, while with the addition of 20% Y, these values were calculated as 8.57, 0.0058, and 3.70 × 10−8 S/cm at 100 Hz. It can be stated that as the amount of Nd and Y additives to the poly(NIPA-co-St) copolymer increases, the έ, ε″, and σac values increase, indicating an improvement in electrical properties with the addition of Nd and Y elements.
AtıfOpenAlex1İncele - MakaleAçık Erişim2026Scopus SJRQ2Structural and optical properties of Bi- and Sn-doped Sb2Se3 thin films prepared by thermal evaporation
Kök, Mediha; Öztürk, Yunus; Sait Kanca, M.
In this study, Sb2Se3-based semiconductor thin films, both pure Sb2Se3 and those doped with Bi and Sn, were produced using the thermal evaporation method. The structural, morphological, and optical properties of the obtained films were investigated using XRD, SEM, and UV–Vis spectroscopy. While films without annealing exhibited an amorphous structure, significant crystallization was observed after annealing at 350 °C, especially at high doping levels. SEM analyses showed significant changes in surface morphology and grain structure depending on the doping level. Optical measurements revealed that absorption increased and the band gap changed with increasing doping level. The band gap for the undoped Sb2Se3 thin film was found to be 1.54 eV. An increase due to the Burstein–Moss effect was observed at low additive ratios, while band narrowing was observed at high additive ratios. The results obtained indicate that Bi and Sn additives improve the optoelectronic properties of Sb2Se3 thin films and hold potential for photovoltaic applications.
- MakaleAçık Erişim2026Scopus SJRQ1Freeze–Thaw Performance and Microstructural Stability of Alkali-Activated Slag Mortars Incorporating Mussel Shell Waste
Şahin Yön, Merve
This study investigates the use of mussel shells (MSs), a biogenic by-product of the food industry, as a partial replacement for ground granulated blast furnace slag (GBFS) in alkali-activated mortars. Given their high CaCO3 content, MSs represent a sustainable secondary raw material that reduces both waste disposal burden and reliance on natural resources, while offering a low-carbon alternative to conventional cement-based binders. Alkali-activated mussel shell/slag mortars (AAMSs) were produced with MS replacement ratios of 0%, 5%, 10%, 15%, and 20% by mass of GBFS. Sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) were used as alkaline activators. Fresh specimens were cured at 60 °C for 48 h. The experimental program included workability, compressive and flexural strength, water absorption, porosity, density, capillarity, ultrasonic pulse velocity (UPV), and freeze–thaw (F-T) resistance tests. Increasing MS content slightly reduced flowability and mechanical strength, while increasing water absorption, porosity, and capillarity. The M0 series achieved the highest 28-day compressive strength (54.06 MPa), while M15 exhibited the highest flexural strength (5.23 MPa). Following F-T cycling, the 5% and 10% MS series demonstrated the best compressive strength (30 MPa). The 10% MS exhibits a relatively balanced overall performance, providing the best balance between mechanical performance, F-T resistance, and microstructural stability, as confirmed by scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDS) analyses showing elevated Ca/Si ratios and the formation of Ca-rich crystalline phases.
- MakaleYalnız künye2026Scopus SJRQ1Determination of microplastic contamination and phthalate ester migration in canned and frozen packaged seafood: A probabilistic human health risk assessment via Monte Carlo simulation
Macit, Arife; Köktürk, Mine; Serdar, Osman; Alak, Gonca
This research was designed to identify the levels of microplastics (MP) and phthalate esters (PAE) in canned and frozen packaged fish and to assess the human health risks associated with these pollutants. Analyses were carried out on a total of 25 sample groups, including 10 different canned tuna samples, 9 different packaged seafood products, and 6 different packaging materials. Microplastics were characterized and polymer identification was performed using μ-Raman and ATR-FTIR spectroscopy, while PAEs were determined by GC–MS/MS. The obtained data were used to calculate estimated daily intake (EDI), hazard index (HI), hazard quotient (HQ), and cancer risk (CR), and uncertainty was assessed using Monte Carlo simulation. The findings revealed that both microplastic and phthalate exposure were higher in the frozen fish group than in canned products. The highest MP concentrations were recorded in packaged Whiting B (0.73 ± 0.25 items/g) and oil-added canned tuna (0.57 ± 0.15 items/g). Regarding PAEs, while DEHP and DBP were generally prominent, significant peak concentrations of BBP and DNOP were also identified, reaching 1.91 ± 0.01 ppm for BBP in canned tuna with sunflower oil and 1.84 ± 0.01 ppm in packaged whiting. Furthermore, higher exposure was observed in males for most PAEs. HQ and HI values were below 1 (maximum HI: 1.57 × 10−2 for males consuming frozen seafood), while CR values remained within an acceptable range (4.74 × 10−7 to 3.49 × 10−6). In conclusion, health risks related to processed fish consumption appear generally low; however, processing and packaging may contribute to contamination and warrant further investigation.
