Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(77)
- Merdan, Mehmet(73)
- Duran, Celal(54)
- Ozdes, Duygu(50)
- Baltaci, Cemalettin(45)
- Kaygusuz, Abdullah(45)
- Kulakaç, Nurşen(39)
- Ashyralyyev, Charyyar(38)
- Karsli, Orhan(37)
- Demir, Selim(36)
- Öztürk, Serkan(36)
- Dokuz, Abdurrahman(35)
- Turan, Ibrahim(35)
- Araz, Onur(33)
- Kandemir, Raif(31)
- Sipahi, Ferkan(30)
- Topal, Fevzi(30)
- Kurt, Kemal(28)
- Peker, Iskender(28)
- Arslan, Mehmet(27)
- Baltacı, Cemalettin(27)
- Maden, Nafiz(27)
- Ozturk, Samet(27)
- Aydin, Aydanur(26)
- Vural, Alaaddin(26)
- Bayrakdaroglu, Serdar(25)
- Kurnaz, Muammer(25)
- Reis, Hatice Catal(25)
- Akar, Zeynep(24)
- Aydin, Faruk(24)
- Gücer, Mehmet Ali(24)
- Topal, Meryem(24)
- Yolcu, Halil(24)
- Yücel, Cem(24)
- Anaç, Halil(23)
- Kankal, Murat(23)
- Ürkek, Bayram(23)
- Aliyazicioglu, Yuksel(22)
- Günen, Mehmet Akif(22)
- Tuncer, Metin(22)
Yayınlar
- MakaleAçık Erişim2025Scopus SJRQ1Unveiling the bioactive potential of Scabiosa rotata M. Bieb fruits: a landmark study on cytotoxic, antioxidant, and antibacterial activities through liquid chromatography-mass spectrometry profiling and molecular docking
Yildirim, Aybeniz; Celep, Inci Kurt; Gül, Abdulkadir; Eter, Özge Soylu; Baǧcl, Eyüp
The aim of this study was to investigate the antioxidant, cytotoxic, and antibacterial activities of ethanol extract (SRE) and its hexane (SRH), chloroform (SRC), ethyl acetate (SREA), and aqueous ethanol (SRAE) sub-extracts obtained from the fruits of Scabiosa rotata M. Bieb. Molecular docking studies were also performed to evaluate the interactions of the most active sub-extract with the human mitochondrial ABC transporter (ABCB10) protein, plays an important role in cellular oxidative stress regulation and mitochondrial function. Total phenolic (TPC) and flavonoid (TFC) contents and antioxidant radical scavenging activities (1, 1-diphenyl-2-picryl hydrazyl [DPPH] and 3-ethylbenzothiazoline-6 sulfonic acid [ABTS]) of all extracts were determined. Cytotoxic activity was evaluated on different cell lines, such as HepG2 (liver cancer), MCF-7 (breast cancer), and HeLa (cervical cancer) cells. Antibacterial activity was tested against Escherichia coli, Pseudomonas aeruginosa, Enterococcus faecalis, and Staphylococcus aureus. SREA showed the best antioxidant activity with IC50 values of 54.20 μg/ml and 48.56 μg/ml for DPPH and ABTS, respectively, and also had high TPC (499.06 mg GA/g) and TFC (327.45 mg QE/g). Furthermore, SREA showed significant cytotoxicity comparable to cisplatin with IC50 values of 51.29, 51.41, and 52.89 μg/ml for HepG2, MCF-7, and HeLa cells, respectively. However, none of the extracts showed antibacterial activity. The analysis using liquid chromatography-mass spectrometry (LC/MS-MS) on SREA found that the main phenolic compounds are chlorogenic acid, hesperidin, quinic acid, and isoorientin. Molecular docking of the major compounds showed that chlorogenic acid (2.21 mM) exhibited the strongest binding affinity, followed by hesperidin (5.83 mM), quinic acid (8.86 mM), and isoorientin (13 mM). These findings indicate the potential of SREA to be used as a natural antioxidant and anticancer agent.
AtıfScopus7WoS7OpenAlex7
İncele - MakaleAçık Erişim2025Scopus SJRQ2SOME PHYSICAL AND MECHANICAL PROPERTIES OF PARTICLE BOARDS PRODUCED WITH HAZELNUT HUSK AND ASTRAGALUS (Astragalus membranaceus) PLANT
Karahan, Selim; Guler, Cengiz
In this study, under laboratory conditions, hazelnut husk and astragalus plant were mixed separately into black pine wood chips, and multi-purpose boards were produced from the obtained chips with urea formaldehyde glue. After the hazelnut husk and astragalus plant were dried and ground, they were added to the chip and glue mixture in certain proportions. Hazelnut husk mixture ratios were applied as 100 %; 0 %, 75 %; 25 %, 50 %; 50 %, 25 %; 75 %, 0 %; 100 % to black pine wood chip in the particle board mixture. These ratios were made in the same way for the astragalus plant. From these mixtures, chipboard blanks of 16 mm thickness and densities between 0,68 g/cm3 and 0,72 g/cm3 were produced. Density, moisture content, thickness increase, water intake, bending strength, modulus of elasticity in bending and tensile strength perpendicular to the surface were tested in physical and mechanical experiments. According to the results obtained, as the participation rate of hazelnut shells and astragalus increased, the durability properties of the panels decreased. At the same time, it shows that the technological properties of the panels produced by adding up to 25 % astragalus plant and hazelnut shells to the mixture comply with the standards.
AtıfScopus2WoS3OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ4Physicochemical, rheological properties, antioxidant activity and mineral amount of the ice cream containing barberry (Berberis vulgaris L.); [Karamuk (Berberis vulgaris L.) ilaveli dondurmanın fizikokimyasal, reolojik özellikleri, antioksidan aktivitesi ve mineral içeriği]
Ürkek, Bayram
Ice cream is classified as a dairy product or frozen dessert. Various fruits have been incorporated into ice cream formulations to enhance their quality and nutritional properties. In this study, ice creams were prepared with barberry at four different concentrations (0%, 5%, 10% and 15%). The physicochemical, rheological characteristics, antioxidant activity, mineral content and sensory properties of the samples were examined. With the addition of barberry, the dry matter (DM), acidity and overrun values increased, while pH and fat content decreased. The viscosity and consistency coefficients were highest in the samples containing 10% and 15% barberry. All samples exhibited pseudoplastic flow behavior. The colorimetric parameters showed significant differences among the samples, except for the C* value. The sample with 5% barberry had higher levels of Ca, Na, Mg, S, Fe and Zn compared to the other barberry-added samples. The sample containing 15% barberry demonstrated the highest DPPH scavenging activity (22.15 μg/mL) and total phenolic content (TPC) (1474.04 mg GAE/g), while the sample without barberry had the lowest values (143.19 μg/mL and 149.48 mg GAE/g, respectively). Additionally, the control sample received the lowest scores for gumming structure, texture, melting in the mouth, resistance to melting and overall acceptability. These findings suggest that incorporating 10% barberry could enhance the quality and nutritional value of ice creams.
AtıfScopus1
İncele - MakaleYalnız künye2025Scopus SJRQ1Influence of PGA/PGV ratio on the seismic performance of buildings with different slenderness ratios considering soil-structure interaction
Araz, Onur
In this study, the seismic performance of buildings equipped with tuned mass damper (TMD) having different slenderness ratios, subjected to ground motions with varying a wide range of PGA/PGV ratios is investigated, considering soil-structure interaction (SSI). A methodology based on hybrid Genetic Algorithm-Particle Swarm Optimization (GA-PSO) algorithm is proposed to determine the optimal parameters of TMD. For this purpose, three buildings (i.e., 3-story, 6-story, and 12-story buildings) are considered and the dynamic properties of these buildings are determined according to the provisions specified in ASCE-7. These buildings, which are frequently encountered in the traditional building stock, represent low, medium, and high-rise buildings, respectively. In the numerical analysis, three different soil types (i.e., SC, SD, and SE) and 80 ground motions are also considered. These records are divided into three different classes: high, intermediate, and low frequency content. The Newmark integration method is used to determine the dynamic responses of the structures in the time domain analysis. Numerical results show that the frequency content of ground motion and the slenderness ratio have a significant effect in reducing the peak displacement and acceleration responses of structures. The findings also demonstrate that when the PGA/PGV ratio is greater than 2, TMD shows mostly sufficient control performance for all buildings and all support conditions.
AtıfScopus21WoS20OpenAlex17İncele - MakaleAçık Erişim2025Scopus SJRQ1Agrivoltaic system design for sugar beets and wheat in central Anatolia
Yalçın, Ömer; Kuzyaka, Duygu; Özden, Talat
Agrivoltaic systems, which integrate photovoltaic (PV) panels with the usage of agricultural land, emerge as a promising strategy by facilitating the simultaneous generation of renewable energy alongside the cultivation of various crops within the same area. This research is centered on the design and implementation of an agrivoltaic system that is specifically customized for the cultivation of wheat and sugar beet in the Central Anatolia Region of Turkey. The primary objective of this research is to optimize the spatial arrangement of the PV panels to achieve a balance between the generation of energy and the productivity of the crops. Through a detailed assessment of shading effects and Photosynthetic Photon Flux Density (PPFD) levels, this investigation will endeavor to unravel the complex interplay between panel configuration and its consequential impacts on both plant growth and energy output. In this investigation, the shading impacts attributed to three distinct configurations—specifically, the conventional solar power plant (SPP), the intermittently arranged panel layout, and the intermittently arranged V-shaped panel configuration—were assessed, and their appropriateness for the cultivation of wheat and sugar beet was evaluated. The V-shaped design, which additionally facilitates rainwater collection, yielded an enhanced PPFD value across the three designated regions beneath the panels.
AtıfScopus11WoS8İncele - Kitap BölümüYalnız künye2025Managing information asymmetry and conflicting interests in multi stakeholder sustainable supply chains using multi-criteria decision analysis
Şimşek, Ahmet Bahadir; Şimşek, Aybala
This chapter focuses on the challenges which information asymmetry and conflicts of interest present to multi- stakeholder sustainable supply chain design and suggests the use of MCDA to address these challenges. It looks at the ways information imbalances and divergent stakeholder priorities hamper cooperation and sustainability objectives to produce trust problems and ineffectiveness. These challenges are outlined in the chapter using theoretical underpinnings such as Game Theory and Akerlof's Market of Lemons. Next, it illustrates the MCDA's role in dealing with these problems (transparency, balancing conflicting interests and making the decision in an inclusive way). The practical application of MCDA is illustrated via a hypothetical green supply chain project that demonstrates the ability of diverse stakeholder priorities to be harmonised through systematic criteria evaluation and consensus building. The chapter concludes with a discussion of MCDA's potential for integrating environmental, social and economic goals in optimal decision making in complex supply chains.
- MakaleAçık Erişim2025Institutional Structure and Environmental Pollution: An Application within the Framework of the Environmental Kuznets Curve Hypothesis
Hayaloglu, Pınar; Recepoglu, Murşit; Cakir, Mehmet Ali
The EKC hypothesis explains the relationship between economic growth and environmental degradation. However, criticisms of its fundamental assumptions suggest that this relationship should be examined more comprehensively. While the EKC hypothesis addresses the link between income levels and environmental quality, it may overlook the impact of institutional structures and policy factors. In this context, recent studies increasingly highlight the role of institutional structures in environmental degradation. Accordingly, this study aims to provide a comprehensive analysis of environmental sustainability by approaching the EKC hypothesis from the perspective of institutional quality. To determine the effects of institutional quality on environmental degradation, the study employs the Driscoll-Kraay estimation method. The analysis is conducted on a sample of SADC countries for the period 1990-2021. The findings indicate that institutional quality has a statistically significant and positive effect on environmental degradation; however, beyond a certain threshold, this effect reverses. Additionally, the impact of economic growth on environmental degradation is examined within the EKC framework, revealing that while per capita income initially increases environmental degradation, exceeding a certain income level leads to improvements in environmental quality. The findings confirm the validity of the EKC hypothesis in SADC countries and suggest that strong institutional structures can play a supportive role in promoting environmental sustainability.
AtıfScopus4OpenAlex3İncele - MakaleAçık Erişim2025Scopus SJRQ2Experimental determination of the compression behavior of RTV silicone rubber-based magnetorheological (MR) materials under static loading
Mazlum, Ugur; Celik, Ilhan
In this study, MR elastomer (MRE) materials were produced using seven different types of silicone rubber and five different types of magnetically sensitive ferromagnetic powders. The MRE materials were obtained in three states: pure, isotropic (homogeneous), and anisotropic (aligned). Compression tests were conducted using a uniaxial testing machine, with engineering stress–strain curves, tangent modulus, and MR-strain behavior graphs generated, considering powder ratio, powder type, and hardness values. The goal was to investigate the positive effects of magnetic field influence on these parameters and how the alignment state affected the stress performance of the materials. As a result, the highest stress increase at 10% strain was observed in materials containing 40% powder, with magnetic field comparison showing the most significant results. With the EM powder type at a 30% powder ratio in the isotropic state, a 563% increase in stress was obtained. Among the matrix materials with the same hardness, the most robust material was determined to be the MM240 TV with a Shore hardness of 40. Furthermore, the most significant increase in tangent modulus under the influence of the magnetic field was observed in vertically aligned materials. Compared to the pure material, a 3127% increase was found at 0.57% strain in vertically aligned samples. In materials with Shore hardness of 2, using Basf CN powder at 10–40% powder ratios, the highest relative MR effect was observed at a 20% powder ratio. The stress increase for vertically aligned samples compared to the pure state was 1274.6% at 0.27% strain. When comparing the relative MR effect of materials with Shore hardness between 10 and 59, the largest increase was obtained from the Sorta Clear matrix material.
AtıfScopus1OpenAlex2İncele - Derleme MakaleAçık Erişim2025Scopus SJRQ2Gray Divorce in the Shadow of Modernization: Changing Family Dynamics in Türkiye
Aydin, Selcuk; Sahin, Abdurrahim; Bahadir, Muhammed
Gray divorce, defined as the dissolution of marriages among individuals aged 50 and above, has become an increasingly significant issue in Türkiye. Official statistics in Türkiye show that between 2001 and 2024, divorces among individuals aged 50 and above increased both in absolute numbers and as a proportion of total divorces, rising nearly threefold during this period. These increases reflect broader demographic and social changes, such as population ageing, longer life expectancy, changing expectations of marriage, and shifting gender norms. Using sociological literature on modernization and family change, as well as official statistical data, this review synthesises existing knowledge and situates gray divorce within global debates on family transformation. Findings from gray divorce studies indicate that women’s increasing autonomy, life cycle transitions such as retirement or empty nest experiences, and greater societal acceptance of divorce contribute to this trend. Furthermore, gray divorces have broad implications for intergenerational relationships, care responsibilities, and social policies. Specifically in Türkiye, regional differences show that divorce among the elderly is more prevalent in western urbanized provinces, where individualism and secular values prevail, and significantly less common in eastern regions, where traditional and religious norms are stronger. The increasing prevalence of this phenomenon highlights the need for more empirical research and policy responses that are appropriate to Türkiye’s demographic, regional, and cultural transformations.
AtıfOpenAlex1İncele - MakaleAçık Erişim2025Drivers of the Load Capacity Factor in New İndustrialized Countries: Economic Growth, Financial Development and Urbanization on Load Capacity Factor
Durmus, Savas; Agırkaya, Melahat Batu; Akyol, Hikmet
This study examines the effects of economic growth, financial development, and urbanization on the load capacity factor (LCF) for Newly Industrialized Countries (NICs) over the period 1991-2021. In this context, we analyzed the relationship between the variables using the Fixed Effects Driscoll-Kraay and Fixed Effects Panel Quantile estimators. The estimation results indicate that across all quantiles (low, medium, and high levels of environmental degradation), economic growth has a positive effect on LCF, while the squared term of economic growth has a negative effect. Urbanization and renewable energy consumption positively impact LCF, whereas financial development and labor force participation rates have negative effects. The positive effects of urbanization and renewable energy consumption on LCF become more pronounced in higher quantiles. Conversely, the negative impact of labor force participation on LCF is stronger in higher quantiles. The negative effect of financial development on LCF, however, becomes statistically insignificant at higher quantiles.
AtıfScopus12OpenAlex11İncele - MakaleYalnız künye2025Scopus SJRQ2Mapping Ethics Research in the Hospitality Scholarship
Polat, Eray; Köseoglu, Mehmet Ali
This paper examines the role of ethics-related research in shaping the intellectual structure of hospitality-literature through a two-step method. The intellectual structure of the most-cited ethics-related references was revealed by co-citation analysis. Content analysis was made to reveal each cluster’s main themes. A database comprising 9664 references from seven hospitality journals, spanning 60 years, was analyzed. The analysis uncovered four thematic clusters, indicating that organizational citizenship behaviors and environmental-ethics are the predominant topics in the hospitality-ethics literature. The previous studies heavily focused on examining relationships and their practical implications. The study adopted a novel approach to bibliometric analysis that has never been used in hospitality ethics-reviews. The results of the concept-discipline-focused hybrid-review provide a comprehensive understanding of the knowledge domain and indicate research directions.
AtıfScopus3WoS3OpenAlex3İncele - MakaleAçık Erişim2025Scopus SJRQ2What is the relationship between fairness and trust in terms of tax compliance?
Günay, Hamdi Furkan
Two frequently researched factors in the tax compliance literature are perceptions of fairness and trust. Nevertheless, what is known about the relationship between the two variables is limited. Different findings in the literature have encouraged further research. This study aims to examine the relationship between fairness and trust in tax compliance and the role of these variables with multivariate statistical tests. In this direction, survey data were collected from 540 self-employed taxpayers in Istanbul/Turkey. As a result of the multivariate statistical tests carried out by dividing the data in two, the following conclusions were reached: (1) in line with the findings in the literature, perceptions of tax fairness and trust in tax authorities are essential determinants of tax compliance intention; (2) tax fairness positively affects trust in authorities and trust in authorities positively affects tax fairness; (3) both the mediating and moderating role of trust in tax authorities in the relationship between perceptions of tax fairness and tax compliance intention are confirmed; and (4) although there is a mediating effect of perceptions of tax fairness in the relationship between trust in tax authorities and tax compliance intention, the existence of a moderating effect could not be detected.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1Safety and Nutritional Profile of Traditional Turkish Cheeses: A Comprehensive Study on Their Mineral Content, Heavy Metal Contamination, and Health Risks of Aho, Golot, and Telli
Erol, Seyit; Ürkek, Bayram
Traditional cheeses from Turkey's Black Sea region, such as Aho, Golot, and Telli, are widely known for their unique flavors and artisanal production methods. However, their microbiological safety, mineral content, and heavy metal contamination remain understudied. In this study, we evaluated 30 cheese samples for essential minerals and toxic heavy metals, alongside conducting a corresponding health risk assessment. The results of our mineral analysis revealed sodium (Na) levels ranging from 9787.79 to 37,902.22 mg/kg, while calcium (Ca) and magnesium (Mg) were present at nutritionally relevant concentrations. Heavy metals such as lead (Pb) and mercury (Hg) were detected, with Golot and Telli cheeses showing elevated levels (Pb: up to 1788.75 μg/kg; Hg: up to 468.71 μg/kg). Furthermore, health risk assessments, including estimated daily intake (EDI), target hazard quotient (THQ), and hazard index (HI), indicated that 93.3% of samples posed negligible risks (HI < 1), though two outliers (6.7%) exceeded safety thresholds. Taken together, these findings underscore the need for improved production processes in traditional cheese production while affirming their nutritional value and overall safety for consumers.
AtıfScopus4WoS2OpenAlex4
İncele - MakaleAçık Erişim2025Scopus SJRQ1Evaluation of ChatGPT-4, Gemini, Claude, and Copilot in Generating Nursing Diagnoses Based on NANDA-I Taxonomy II: A Comparative Cross-Sectional Study
Tuncer, Metin; Yalcinkaya, Turgay
Aim: To evaluate the capability of large language models to generate nursing diagnoses based on NANDA-I Taxonomy II and assess their performance across domains and overall. Background: Large language models are emerging tools in nursing, showing potential to aid in diagnosis generation and education. However, their accuracy and applicability in clinical and educational settings remain underexplored. Methods: This cross-sectional comparative study used 10 realistic patient scenarios based on NANDA-I Taxonomy II, covering 12 domains. The study aimed to evaluate the capability of four models to generate nursing diagnoses based on patient scenarios. The responses were assessed by five nursing experts for accuracy and alignment with NANDA-I Taxonomy II in a single-blind evaluation process. Results: All models demonstrated similar performance across different domains and overall, with Claude attaining the highest overall performance score. Expert evaluations indicated moderate interrater reliability. Discussion: Small variations between models and occasional omissions suggest that expert review is still required before clinical use. Conclusions: Large language models are not yet sufficiently reliable for independent use in clinical settings and nursing education. Their application as supportive tools necessitates a cautious approach. Moreover, the development of specialized models designed to address the unique demands of the nursing field would be advantageous. Implications for nursing: When large language models are used in nursing practice, their limitations should be considered, and the outputs they produce should be verified by nurses. Implications for nursing policy: Ensuring the safe integration of artificial intelligence tools into nursing necessitates the establishment of robust regulatory policies to safeguard patient safety, the deployment of effective systems to monitor models’ performance, and the development of comprehensive guidelines and training programs.
AtıfScopus2WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ3Effects of hawthorn (Crataegus oxycantha) fruit extract on tibia bone properties in broiler chickens subjected to heat stress
Kaya, H.; Karaalp, M.
The purpose of this study was to examine the effects on tibia morphology, biomechanics, and mineral levels of varying dosages of hawthorn (Crataegus oxyacantha) fruit extract (HFE) addition to experimentally heat-stressed broiler drinking water. A 2x3 factorial experimental design was used to randomly assign 300 one-day-old male broilers to six experimental groups. The experimental groups included three different HFE additions (0, 0.2, and 0.4 mL/L) and two different ambient temperatures (24 and 35 °C). Each experimental group consisted of five replicates, with 10 chicks (initial body weight 38±4 g) per replicate. The study results indicated that heat stress (IIS) led to a decline in tibia dry weight, length, wet weight, volume, Seedor index, cortex thickness, shear force and shear stress, while concurrently resulting in an increase in dry matter percentage (P<0.05). Heat stress led to a decline in the levels of calcium (Ca), magnesium (Mg), copper (Cu), iron (Fe), zinc (Zn) and potassium (K) (P<0.05). The addition of HFE in the drinking water of broiler chickens exposed to HS did not significantly affect the morphological and biomechanical properties of the tibia. However, tibial Ca levels increased with the addition of 0.2 mL/L HFE, while Mg and Zn levels were elevated at both 0.2 and 0.4 mL/L HFE concentrations compared to the control group (P<0.05). In contrast, Fe and Mn levels decreased with 0.2 mL/L HFE supplementation, and K levels were reduced at both supplementation levels compared to the control (P<0.05). The findings suggest that the addition of 0.2 mL/L HFE to the drinking water of heat-stressed broiler chickens may be an effective and recommended strategy to enhance bone quality characteristics.
- MakaleAçık Erişim2025Scopus SJRQ1The Effect of a Mindfulness-Based Stress Reduction Program on Depression and Quality of Life in Cancer Patients
Özmaya, Esma; Uzun, Sevda; Aytaç, Tufan
Mindfulness-based interventions have been receiving growing attention in cancer care. This study was performed to determine the effect of a mindfulness-based stress reduction program on depression and quality of life in cancer patients. The screenings in the study were performed in January to May 2023 through the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Web of Science, Science Direct, and YÖK Thesis Center databases. After the reviews, 14 studies were included in the study. This meta-analysis showed that mindfulness-based stress reduction programs were effective on depression (SMD: −0.363; 95% CI: −0.711 to 0.015; Z = −2.042; P = .041; I2 = 85.229%) and quality of life (SMD: 0.363; 95 CI%: 0.111-0.615; Z = 2.822; P = .005; I2 = 75.222%). The type of cancer (SMD: 0.385; CI: between 0.005 and 0.528; P = .000); duration of therapy (SMD: 0.243; CI: between 0.093 and 0.393; P = .002); the person providing therapy (SMD: 0.335; CI: between 0.133 and 0.507; P = .001); scale used (SMD: 0.290; CI: between 0.148 and 0.432; P = .000); and the origin of the study (SMD: 0.298; CI: between 0.158 and 0.438; P = .000) moderators were found to play a role in the effectiveness of a mindfulness-based stress reduction program on the quality of life of cancer patients. The mindfulness-based stress reduction program yields positive outcomes by reducing depression, enhancing the quality of life in cancer patients, and promoting overall mental well-being in individuals.
AtıfScopus1WoS1İncele - MakaleAçık Erişim2025Scopus SJRQ2Experimental research on enhancing effectiveness in teaching the nature of seasons
Semercioğlu, Melike Güzin; Kalkan, Hüseyin
In recent years, studies by education researchers indicate that, despite various instructional methods to enhance the conceptual understanding of seasons, the reasons for the formation of seasons and the processes involved are still not fully grasped. This research aims to investigate the fundamental reasons for the difficulties in comprehending the formation of seasons and to develop possible solutions. To achieve this goal, a physical model based on the “Change in the Amount of Energy Falling onto a Unit Surface (CAEFUS)” of parallel beams of sunlight as Earth orbits around the Sun with a tilted axis of approximately 23.5 degrees was developed and applied to participants, and data were collected. These instructional processes were applied to experimental and control groups. The research was conducted on 148 eighth-grade students in a state school in Samsun (the city in Turkey) province. Exploratory factor analysis was used to analyze students' drawings and separate them into their most prominent elements. The quantitative data analysis, consisting of multiple-choice questions, utilized the SPSS 22.0 statistical program. According to ANOVA Results for SEMAT Achievement Scores, a significant difference was determined between the experimental and control groups (F = 7.625, p < 0.05). In addition, the control group mean in the pre-test fell below the experimental group mean in the pre-test. However, the mean of the experimental group in the post-test exceeded that of the control group (Pre-test‘e’ = 1.54, Pre-test‘c’ = 1.82; Post-test‘e’ = 3.21, Post-test‘c’ = 2.86). The data analysis revealed that the CAEFUS-based model significantly impacted the meaningful teaching of the nature of seasons. These results were thoroughly evaluated through a detailed comparison with the literature.
- MakaleAçık Erişim2025Scopus SJRQ1The 2023 Mw 7.8–7.7 Kahramanmaraş earthquakes were loosely slip-predictable
Vavra, Ellis; Fialko, Yuri; Bulut, Fatih; Garagon, Aslı; Yalvaç, Sefa; Yaltırak, Cenk
Understanding the behavior of large earthquakes over multiple seismic cycles is limited by short time spans of observations compared to recurrence intervals. Most of large instrumentally-recorded earthquakes have occurred on faults lacking well-documented histories of past events. The 2023 Mw 7.8–7.7 Kahramanmaraş earthquake doublet is exceptional as it ruptured multiple segments of the East Anatolian Fault (EAF) system, where historical records of devastating earthquakes span over two millennia. Here, we use historical earthquake records, measurements of interseismic deformation, and published slip models of the 2023 events to evaluate the recurrence patterns of large earthquakes. We compare slip deficit that accrued on each fault segment since the respective penultimate events to the average coseismic slip of the 2023 doublet. We find that the coseismic slip equaled to or exceeded the accumulated slip deficit, suggesting that the slip-predictable recurrence model applies as a lower bound on strain release during the Kahramanmaraş earthquakes.
AtıfScopus12WoS11İncele - MakaleYayıncıda açık erişim2025Scopus SJRQ2Efficient extraction and determination of Au(iii) ions from acid mine drainage and water samples using silica gel immobilized with Brevibacillus borstelensis
Camoglu, Aslihan Yilmaz; Duran, Celal; Ozdes, Duygu; Nalcaoglu, Aleyna; Bektas, Kadriye Inan; Belduz, Ali Osman
The analysis of gold, which is a precious metal with limited resources, in environmental samples is crucial for the sustainable utilization of natural resources. Therefore, in the present research we have aimed to develop a novel and environmentally friendly bioadsorbent, Brevibacillus borstelensis loaded on silica gel (BB@Si), with outstanding adsorptive properties that can be implemented for quantitative recovery of Au(iii) ions via the solid phase extraction (SPE) technique. After characterizing the developed adsorbent using FTIR and SEM techniques, we conducted a detailed investigation of the critical parameters that influence the extraction performance of Au(iii) ions. Optimum parameters were observed as follows: pH 3.0, adsorption contact time 30 min, eluent type 0.1% (w/v) thiourea in 0.5 M HNO3, elution time 60 min, BB@Si amount 1.0 g L−1, and sample volume 400 mL. Some of the well-known isotherm and kinetic models were applied to the results observed from the adsorption studies. Equilibrium adsorption capacity of BB@Si was estimated to be 66.2 mg g−1 utilizing the Langmuir isotherm model while the limit of detection (LOD) and relative standard deviation (RSD%) were established as 0.99 μg L−1 and 3.7%, respectively. The developed method was utilized smoothly for the quantification of Au(iii) ions in mining wastewater, acid mine drainage (AMD), streams and seawater.
AtıfScopus3WoS2OpenAlex2İncele - MakaleAçık Erişim2025Scopus SJRQ2Spatially explicit modeling of road icing susceptibility using GIS and a multi-criteria decision approach: A case study of Gümüşhane city (Türkiye)
Işık, Fatih; Kanyılmaz, Rabia; Çağlak, Savas; Eraslan, Selim; Zeybek, Halil İbrahim
This study develops and validates a GIS-based, spatio-temporal model to identify and prioritize road segments with high icing susceptibility in the Gümüşhane city center, Türkiye. Icing on urban roadways constitutes a significant threat to vehicular and pedestrian safety, particularly in regions characterized by complex topography and dense urban morphology. A Multi-Criteria Decision Analysis (MCDA) framework, employing the Analytic Hierarchy Process (AHP) with structured expert input, was used to synthesize ten primary causative factors. These include solar radiation, temperature, aspect, object height, precipitation, elevation, pavement material, slope, albedo, and road width — each representing a distinct topographic, climatic, or morphological influence on urban road icing. The AHP quantitatively established the relative influence of these factors, identifying solar radiation (28.5%), temperature (18.2%), and aspect (13.5%) as the most dominant drivers. The model generates monthly susceptibility maps that reveal "urban canyons"—narrow streets flanked by highrise buildings—consistently exhibit the highest and most persistent susceptibility due to severely limited solar radiation. The accuracy of the model's spatial predictions was quantitatively validated through field observations, with 91.4% of recurring icing locations correctly identified within high or very high susceptibility zones. This research culminates not only in a robust scientific framework but also in a validated decision-support tool that has been successfully integrated into the Gümüşhane City Information System (GCIS), where it is now operationally used to optimize winter maintenance strategies. Ultimately, this work provides a replicable, data-driven approach for enhancing urban resilience and traffic safety in challenging topographical settings.