Yayınlar
Koleksiyondaki öğeler
- MakaleAçık Erişim2009Scopus SJRQ1Crustal thermal properties of the central Pontides (Northern Turkey) deduced from spectral analysis of magnetic data; [Orta pontidlerin (Kuzey Türkiye) kabuksal isıl özelliklerinin manyetik verilerin spektral analizi ile belirlenmesi]
Maden, Nafiz
The Pontides can be divided tectonically into three main sectors: Eastern, Central, and Western Pontides. Each of these represents an amalgamated tectonic mosaic consisting of remnants of oceanic, continental, and island arc segments. The Eastern and the Western Pontides meet in the Central Pontides, where they are structurally mixed and form a tectonic knot. The Central Pontides of northern Turkey is one of the best exposed segments of the southern margin of Eurasia adjacent to the Tethys Ocean. The study area also extends to parts of the Sakarya and Ki{dotless}rşehir continents. Magnetic spectral analysis, which has been used to estimate the Curie point depths and heat flow values, is employed to identify the thermal regime of the Central Pontides. The magnetic data of the region are separated into five subregions and the power spectra of each region is achieved by using 2D Fourier transform method to attain the average curie depth. The curie depth values changes across the studied region from 14.8 km in the south to 21.8 km in the north. The obtained results imply a high thermal gradient (39.2 °Ckm-1) and corresponding heat flow values (94.1 mWm-2) in the south of the research area. The northern part of the study area displays a low thermal gradient (26.6 °Ckm-1) and low heat flow value (63.9 mWm-2), corresponding to the Central Pontides consisting of accreted oceanic crustal material. The determined values show the heat flow decrease within the accretionary prism toward the island arc-like Pontides.
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İncele - MakaleAçık Erişim2024Scopus SJRQ2Performance Comparison of Various Tunnel Lighting Scenarios on Driver Lane-Changing Behaviours in a Driving Simulator
Ozturk, Omer Faruk; Mazlum, Yusuf; Aydin, Metin Mutlu; Coruh, Emine; Bayata, Halim Ferit
Recent advances in tunnel infrastructure have emphasized safety, operational efficiency and low operating costs. Modern tunnels are equipped with systems to improve both safety and operational performance. This study investigates the effect of tunnel lighting and vehicle breakdown scenarios on driver lane changing behaviour (LCB) using a driving simulator modelled on the third longest twin-tube tunnel. Data were collected from 125 drivers considering various driver characteristics with different lighting conditions and the presence of a stopped vehicle in a lane. The results show that drivers tend to slow down and change lanes more safely in response to red and flashing lights. In contrast, blue sky lights, which are designed to reduce stress and compare with other dangerous scenarios, had no significant effect on LCB. In addition, demographic factors such as gender and previous simulator experience played a role in influencing LCB tendencies. Female drivers and those familiar with simulators showed more cautious behaviour. The findings showed valuable insights into how tunnel lighting systems can improve safety. Results highlighted the potential for dynamic lighting and targeted driver training programs to improve tunnel safety. All these findings may contribute to ongoing efforts to improve traffic management and reduce accidents in tunnel environments.
AtıfScopus4WoS4OpenAlex6İncele - MakaleAçık Erişim2025Scopus SJRQ2Reliability and Validity of the Turkish Version of the Walsh Family Resilience Questionnaire
Arslan, Kübra; Hatipoğlu, Ertuğrul
A multidimensional scale to measure family resilience, which focuses on facilitating positive adaptation and strengthening the family unit when affected by high-stressful events, does not exist in Turkish. The aim of this study was to adapt the Family Resilience Scale into Turkish and to conduct a validity and reliability study. The Family Resilience Scale was translated into Turkish and back-translated. Simple random sampling was used to create a representative sample of adults from 321 families selected in Turkey in 2022. The reliability of the scale as a whole and of the subscales was examined using Cronbach’s alpha. Test-retest reliability, the scale was administered to 30 individuals two weeks apart to determine reliability using the test-retest method. Cronbach alpha coefficients were greater than 0.70 for all scales. The test-retest reliability for the General Family Resilience Scale score was found to be.725. According to the results of the confirmatory factor analysis, chi-square χ2 = 2.598; RMSEA= 0.071; SRMR= 0.06; IFI= 0.90; CFI= 0.90; GFI= 0.89; TLI= 0.88. This study provides evidence that the Family Resilience Scale has good validity, reliability and test-retest reliability for Turkish families. Further testing, including construct validity and testing in different contexts, will strengthen the evidence. This scale will find application in resilience research, clinical settings, and facilitate the development and evaluation of intervention programmes to build resilience in Turkish families.
AtıfScopus3WoS3OpenAlex4İncele - MakaleAçık Erişim2025Scopus SJRQ3The Effects of Body Awareness on Fall-Related Behaviors and Fall Risk in Geriatric Individuals
Şen, Müşerref Ebru; Özdemir, Filiz; İnceoğlu, Feyza
Aims: Aging is an inevitable stage in which in addition to physiological and mental changes, perception and awareness decline, and memory functions gradually deteriorate. The aim of this study was to examine the effects of body awareness on fall-related behaviors and fall risk in geriatric individuals. Methods: This cross-sectional study was conducted with 176 individuals over 65 years of age who presented to family health centers. Body awareness (BAQ), fall-related behaviors (FaB) and fall risk (Morse) were examined. Statistical significance was accepted as p < 0.05 in the analyzes. Results: There was a moderate, negative, and statistically significant relationship between the Morse and BAQ scores of the participants (r=-0.576) (p < 0.05). There was a moderate, positive, and statistically significant relationship between the BAQ and FaB scores of the participants (r = 0.235) (p < 0.05). Conclusions: The results showed a significant relationship between body awareness levels and fall-related behaviors and fall risk in geriatric individuals.
- MakaleAçık Erişim2024Scopus SJRQ3The Effect of Oral and Dental Health Status on the Self-Esteem Levels of Turkish University Youth
Alsaç, Selda Yüzer; Oztas, Gulay; Acar, Mukaddes Demir; Tuncay, Birgül; Coskun, Adnan Batuhan
Objectives: This study aimed to investigate the impact of oral and dental health status on the self-esteem levels of Turkish university youth. Methods: This descriptive cross-sectional study included a sample of 962 Turkish university youth, aged 16 - 24, who met all the study criteria during the 2020 - 2021 academic year. Data were collected using a questionnaire and the Rosenberg Self-Esteem Scale (RSES). The data were analyzed with SPSS version 23.0. T-tests were used for pairwise comparisons, and one-way ANOVA was used for multiple comparisons. Results: Among the students who participated in the study, 56.7% were found to have high self-esteem, with a mean RSES score of 1.69 ± 1.62. Statistically significant differences were found between the RSES score and several factors, including decayed teeth (P < 0.01), presence of halitosis (P < 0.01), tooth color (P < 0.01), crooked teeth (P = 0.045), and toothache (P = 0.008). It was determined that dental crookedness, decayed teeth, bad breath, dark yellow teeth, the presence of tooth fillings, and extracted teeth were negatively associated with self-esteem. However, no statistically significant differences were found between selfesteem and factors such as the presence of tooth fillings, extracted teeth, tooth brushing habits, frequency of dental visits, or snack food consumption (P > 0.05). Conclusions: The results of this study reveal that poor oral care negatively impacts individuals' self-esteem. Issues related to oral and dental health, particularly concerning the appearance and condition of teeth, affect young people's relationships and self-confidence in social environments. It is crucial to develop family and school education programs, as well as national policies, particularly during childhood and university years, when attitudes toward oral and dental health are being established.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2025Scopus SJRQ2Investigation of structural and adhesion properties of ZnO and h-BN doped TiO2 coatings on Cp–Ti alloy
Belet, Ali Kadir; Şüküroğlu, Süleyman; Şüküroğlu, Ebru Emine
Titanium and its alloys are widely used in aircraft, automotive, chemistry, marine, and military industries owing to their superior properties such as specific strength, very low density, high melting point, high corrosion resistance, good fatigue strength and toughness, low elastic modules, and excellent biocompatibility. However, insufficient tribological properties such as high and unstable friction coefficient, low scraping wear resistance and strong adhesion tendency, and poor corrosion resistance in some aggressive corrosive environments such as severe chloride solution limits the use of titanium and its alloys in some engineering applications. For this reason, it has become quite common to change and/or improve the surface properties of titanium and its alloys. In this study, the structural properties of TiO2 coatings with zinc oxide (ZnO) added TiO2 and hexagonal boron nitride (h-BN) added TiO2 grown composite coatings, respectively, on Cp–Ti substrates by micro-arc oxidation method and the adhesion behavior between the base material and coatings were investigated.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2009Scopus SJRQ4Evaluation of annual legumes and barley as sole crops and intercrop in spring frost conditions for animal feeding I. Yield and quality
Yolcu, Halil; Dasci, Mahmut; Tan, Mustafa
This study evaluated sole grass pea (Lathyrussativush.), sole common vetch (Vicia sativa L.), sole barley (Hordeum vulgare L.), common vetch + barley intercrop, common vetch (I) and barley (I) in terms of yields and quality properties in 2006-2007 at Kelkit Aydin Dogan Vocational Training School Research Station of Gumushane University, Turkey. Intercrop plants were separated as common vetch (called as common vetch I) and barley (called as barley I). Plants were seeded in April of both years in a randomized complete block design with 3 replications. The study plots were 3.0 m long by 1.68 m wide, with 24 cm row spacing. Each plot was fertilized with 20 ton ha-1 organic farmyard manure. The year effects were significant in dry matter yield, crude protein, crude protein yield, acid detergent fiber and neutral detergent fiber. The legumes especially were injured by frost in 2007. Significant differences were found in terms of Dry Matter Yield (DMY), Crude Protein (CP), Crude Protein Yield (CPY), Acid Detergent Fiber (ADF), Neutral Detergent Fiber (NDF), Dry Matter Intake (DMI), Dry Digestible Matter (DDM) and Relative Feed Value (RFV) amongst all the plants. Sole common vetch and sole barley had good properties in DMY, CP and CPY. Sole grass pea, common vetch (I), sole common vetch and intercrops showed good quality properties in ADF and NDF. Sole grass pea especially, sole common vetch and common vetch (I) had good quality properties in DMI, DDM and RFV. Farmers should prefer sole common vetch and sole grass pea cultivation in yield and quality and regulate their seeding times according to days with frost in similiar conditions.
AtıfScopus17WoS14İncele - MakaleYalnız künye2025Scopus SJRQ3A record of the Lebanese Lizard (Phoenicolacerta laevis) in northern Türkiye: Evidence of possible human-mediated dispersal
Şahin, Mehmet Kürşat; Çetintaş, Ortaç; Yanchukov, Alexey; Kurnaz, Muammer
The Lebanese Lizard (Phoenicolacerta laevis), primarily native to the Levant region, has recently been discovered in isolated populations well beyond its known distribution. This study presents the first confirmed record of P. laevis along the Black Sea coast of northern Türkiye, specifically in the city of Karadeniz Ereğli, Zonguldak Province. Mitochondrial cytochrome b (cyt b) sequence analyses revealed a high degree of genetic similarity (>99%) between the Karadeniz Ereğli specimens and those from both Andırın, Kahramanmaraş (within the species' native range in southern Türkiye) and Anaklia on Georgia's Black Sea coast, suggesting a shared origin. We propose that the presence of P. laevis in Karadeniz Ereğli is likely the result of human-mediated introduction, possibly via maritime trade, as the lizards were found restricted to the walls of a single building near a major port. A comparable introduction scenario has previously been suggested for the Anaklia population. The highly localized occurrence and absence of the species in neighboring areas indicate a recent introduction; however, the factors inhibiting further spread within the urban landscape remain unclear. This finding contributes to the broader understanding of species distribution dynamics and underscores the significant role of anthropogenic activity in facilitating the range expansion of non-native reptiles.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2024Scopus SJRQ2Advanced Tomato Disease Detection Using the Fusion of Multiple Deep-Learning and Meta-Learning Techniques
Catal Reis, Hatice
Automatic and early detection of diseases in crops is important for producers in terms of product yield. Methods are needed to diagnose the disease and select interventions for tomato leaf. This study aims to create a novel framework for automatically extracting tomato leaf disease. The recommended method automatically detects diseases in three classes: healthy, early, and late blight. This study developed a multi-deep and meta-learning fusion framework that automatically combines modern deep-learning algorithms and meta-classifiers to detect tomato leaf disease. The study includes CNN, transformer, and MLP-based models previously trained with the ImageNet dataset and voting classifier (VtC) methods, which are meta-classifiers. Hybrid approaches have been developed using the VtC method and deep learning algorithms such as CoAtNet, FasterNet, FastViT, WaveMLP, and DenseNet201. In addition to the proposed hybrid framework, different types of deep learning models based on CNN, transformer, MLP, transfer learning, and the dataset improved by the CLAHE technique and the original dataset were used to diagnose tomato leaf diseases. While CNN-based modern architectures include DenseNet201, MobileNet, LCNet, GhostNet, CoAtNet, ConvMixer, and FasterNet, transformer architectures include BeiT, FlexiViT, MaxViT, FastViT, and MLP-based architectures include MLP mixer and WaveMLP models. In the classification performed with original images, the proposed method produced incorrect results in only five images among 900 test data. In the classification made with CLAHE images, the proposed hybrid framework produced the most successful result in this study, producing incorrect results in only four images.
AtıfScopus9WoS8OpenAlex8İncele - Kitap BölümüYalnız künye2025Climate Change and Urban Poverty Solutions to Prevent Poverty
Cengiz, Emre
Cities are at the centre of economic, social and political life. As a result, cities are constantly growing and their populations are rapidly increasing. As is well known, references are made to the industrial revolution when defining today's cities. With the industrial revolution, cities have become major centres for rural-to-urban migration. With this wave of migration, the construction of informal structures in cities and the struggle for survival of new urban poor in these settlements can be observed. This process is continually observable in developed, developing and underdeveloped countries at different times and to varying degrees. As a result of cities themselves becoming commodified in a world continually impacted by climate change, the urban poor’s struggle to survive has been intensified by factors such as increasing rent prices, reduced access to basic services, diminishing access to food and clean water, and settlement instability.
- Kitap BölümüYalnız künye2025Education management in disasters
Mizrak, Sefa; Yildiz, Eyyüp
The effects of disasters on the community increase with increasing population and urbanization, the destruction of the environment, and climate change. This situation increases the need for disaster education at every stage of integrated disaster management. Effectively planned disaster education for preparation, mitigation, response, and recovery periods will ensure that the community is more resilient to disasters. The aim of this study is to investigate how the use and prevalence of new developing technologies can be used more effectively to increase the disaster education capacity of the community. Within the scope of the study, the use of technologies such as virtual reality, social media, simulations, and mobile games in disaster education will be explained. The public administration policies that need to be implemented to increase the use of these tools will be explained. In particular, suggestions will be presented to increase the sustainability and safety of the community through the use of innovative technology in disaster education. It is expected that this study will give ideas to scientists and decision-makers about the use and importance of technology in disaster education.
- MakaleYalnız künye2025Scopus SJRQ2Association Between Cyber Pornography Use and Sexual Health Literacy and Sexual Function in Women of Reproductive Age: A Cross-Sectional Study
Bilgiç, Fatma Şule; Yıldız Karaahmet, Aysu; Karakaş, Sevda
This study aimed to examine the association between cyber pornography use, sexual health literacy, and sexual function in women of reproductive age. This cross-sectional study was conducted via an online platform using Google Forms between January 25 and February 23, 2025, with 1,202 female participants aged 18–35. Data were collected using a Data Collection Form, the Cyber Pornography Use Scale-9 (CPUS-9), the Arizona Sexual Experiences Scale (ASEX), and the Sexual Health Literacy Scale (SHLS). The average age of the participants was 23.19 ± 3.34 years. The mean total score for CPUS-9 was 2.26 ± 1.34, for ASEX was 14.98 ± 6.80, and for SHLS was 57.65 ± 13.18. A weak positive correlation was found between CPUS-9 and SHLS, while a weak negative correlation was observed between ASEX and SHLS. According to regression analysis, as sexual dysfunction increased in women, cyber pornography use also increased (β = 0.550), resulting in a 0.57-unit increase. Furthermore, as sexual health literacy increased, cyber pornography use also increased (β = 0.190), leading to a 0.19-unit increase. The findings suggest that cyber pornography use in women is associated with sexual function and sexual health, and these associations may relate to individuals’ levels of sexual health literacy.
AtıfScopus1WoS1OpenAlex2
İncele - MakaleAçık Erişim2025Scopus SJRQ2Petrochemistry and geochronology of Middle Eocene high-K calc-alkaline I-type Kazıkbeli pluton, NE Turkey: implications from zircon U-Pb ages and Sr-Nd-Pb-Lu-Hf isotope data
Güloğlu, Zikrullah Samet; Kaygusuz, Abdullah
The Kazıkbeli pluton, located in the Kürtün (Gümüşhane) region of the Eastern Pontides, NE Turkey, was studied by employing zircon U-Pb geochronology, whole-rock geochemistry, Sr-Nd-Pb and zircon Lu-Hf isotope geochemistry. LA-ICP-MS U-Pb zircon dating revealed that the gabbroic diorite and granodiorite components of the pluton solidified during the Lutetian epoch of the Middle Eocene, at approximately 46.10 ± 0.26 Ma and 45.37 ± 0.29 Ma, respectively. The pluton is composed of calc-alkaline rocks, ranging from gabbroic diorite to granite (SiO2 = 55.3 to 72.4 wt%). These I-type rocks are typically metaluminous but exhibit peraluminous tendencies in some cases. They are enriched in large ion lithophile elements and display concave chondrite-normalized rare earth element patterns (LaN/YbN = 4.39 to 6.67) with negative Eu anomalies (EuN/Eu* = 0.45 to 0.80). The initial εNd values ranged from 1.85 to 2.24, and the initial 87Sr/86Sr(i) ratios ranged from 0.70458 to 0.70484, consistent with a mantle source in the isotope ratio diagram. The initial 206Pb/204Pb(i), 207Pb/204Pb(i), and 208Pb/204Pb(i) ratios ranged from 18.505 to 18.571, 15.595 to 15.601, and 38.560 to 38.590, respectively. They have positive εHf(i) values (5.75 to 8.03), located between depleted mantle and chondrite evolution values. Fractional crystallization of plagioclase, hornblende, and Fe-Ti oxide minerals played a significant role in the magma evolution, while assimilation and magma mixing may have had a minor influence. Collectively, the evidence suggests that the primary magma source for these plutonic rocks was an enriched lithospheric mantle. Subsequent differentiation within crustal magma chambers, with limited crustal contamination, shaped the final magmatic evolution.
AtıfScopus1WoS1OpenAlex2İncele - MakaleYalnız künye2008Scopus SJRQ1Influence of weathering on the engineering properties of Harsit granitic rocks (NE Turkey)
Ceryan, Sener; Tudes, Sule; Ceryan, Nurcihan
Weathering and hydrothermal alteration of the granitic rocks in the Eastern Black Sea Region (NE Turkey) are important phenomena affecting the engineering projects in the region. The study investigated the probable paths of rock-forming mineral transformations due to weathering in the Harsit granitoid rocks, the changes of the major oxides as a consequence of weathering and the effects of weathering on the engineering properties. To identify the changes in the major oxides, the volume concentrations were considered in relation to the dry density. Chemical leaching during weathering was shown to be significant in changing the minerals. It was concluded that the engineering properties of the weathered granitic rocks can be most reliably predicted by P-wave velocity.
AtıfScopus68WoS63OpenAlex77İncele - MakaleAçık Erişim2025Scopus SJRQ2Green synthesis of iron and silver nanoparticles from aqueous extract of buckwheat husk waste: antibacterial, cytotoxic, and dye decolorization properties
Karpuz, Ömer; Baltacı, Cemalettin; Gül, Abdulkadir; Gülen, Jale; Bozbeyoğlu, Pınar; Aydoğan, Nebahat
Iron oxide (BHFeNP) and silver nanoparticles (BHAgNP) were produced using a green synthesis method through the extract of buckwheat husk (BH) waste to remove dye pollutants from water bodies in this study. The BHFeNP and BHAgNP were characterized by TEM, SEM, XRD, EDX, and FTIR techniques. Then, the methylene blue (MB) removal performance of the synthesized nanoparticles (NPs) was investigated. MB adsorption experiments showed that BHFeNPs were more dependent on temperature, adsorbent amount, and pH, while BHAgNPs notably depended on adsorbent amount, initial MB concentration, and pH. BHAgNPs had higher adsorption rates than BHFeNPs, and the Langmuir isotherm was more suitable for the adsorption process. BHAgNP and BHFeNP were shown to have the maximum adsorption capacities of 96.3 and 53.4 mg/g at pH 8 and 25 °C, respectively, in the presence of 0.25 g/L NP. Kinetic and thermodynamic calculations revealed that MB adsorption was spontaneously endothermic and supported the pseudo-second-order kinetic model. The antibacterial potentials of BHFeNPs and BHAgNPs were investigated against two gram-negative (Escherichia coli and Pseudomonas aeruginosa) and two gram-positive (Enterococcus faecalis and Staphylococcus aureus) bacterial strains. BHAgNPs exhibited a higher antibacterial activity against the strains used. In cytotoxicity studies with ARPE-19, A549, HeLa, and DU-145 cell lines, it was observed that BHAgNP had a greater cell growth inhibition effect than BHFeNP and BH extract. Examining the morphological changes in the cells exhibited that BHAgNP significantly inhibited A549 and ARPE-19. Reusability studies of the generated NPs revealed MB removal capabilities of 92.5% and above after the fifth stage. The present study demonstrates that BHAgNP and BHFeNPs are viable nanoadsorbents for the elimination of environmental pollution due to their excellent removal performances and stable adsorbent characteristics.
AtıfScopus15WoS7İncele - MakaleAçık Erişim2025Scopus SJRQ4Long-term mechanical and physical behavior of rural concrete roads: A case study from Trabzon; [Kırsal beton yolların uzun vadeli mekanik ve fiziksel davranışı: Trabzon’dan bir vaka çalışması]
Seferoğlu, Mehmet Tevfik; Lermioğlu, Fatma
This study evaluates the long-term mechanical and physical performance of rural concrete pavements-defined as two-lane, unreinforced jointed plain concrete pavements constructed with a C25 mix design, an average slab thickness of 18–20 cm, serving low-to-moderate traffic volumes (<500 vehicles/day, <10% heavy vehicles), and built directly over compacted granular subgrade-using cylindrical core samples extracted from five neighborhoods in Trabzon, Türkiye: Çal, Gökçeler, Derecik, Çiğdemli, and Yolgören. Laboratory tests included compressive strength, splitting tensile strength, elastic modulus, capillary water absorption, and abrasion resistance. Yolgören exhibited the most severe deterioration, with a 34.84% loss in compressive strength, the lowest tensile strength, and the highest abrasion loss (0.088%), primarily attributed to poor drainage and heavy traffic. Derecik showed 22.18% strength loss and the lowest elastic modulus (14.9×103 MPa), likely due to weak subgrade and freeze-thaw cycles. Çal displayed moderate strength but had the highest capillarity coefficient and significant stiffness reduction (elastic modulus: 15.7×103 MPa), indicating high porosity and freeze-thaw damage. Çiğdemli performed best in surface durability, with the lowest abrasion loss (0.026%) and satisfactory elastic modulus. Gökçeler presented a rare case of strength gain (+0.85%) and retained acceptable stiffness, though minor surface wear (abrasion loss: 0.038%) was observed. These findings demonstrate that mix design alone does not guarantee long-term durability in rural pavements. Site-specific factors-such as curing effectiveness, drainage planning, subgrade preparation, and climate-must be considered in pavement design. A context-sensitive, performance-based approach is recommended for the sustainable development of rural road infrastructure.
- MakaleAçık Erişim2025Scopus SJRQ3One-Step Green Hydrothermal-Assisted Synthesis of Carbon Quantum Dots From Robinia hispida L. Flowers, and Flourimetric Detection of Au3+ Ions in Aqueous Media
Başoğlu, Aysel
Water-soluble fluorescent carbon quantum dots (CQDs) were synthesized via a single-step, eco-friendly hydrothermal process using Robinia hispida L. flowers as a novel carbon source. Advanced characterization techniques (HRTEM, XRD, XPS, FTIR, UV–vis, and fluorescence spectroscopy) revealed spherical CQDs with an average size of 3.96 ± 0.83 nm and a quantum yield of 5.13%. Under 365 nm UV light, the CQDs emitted blue fluorescence. Fluorescence quenching studies with various metal ions showed a significant 93.5% reduction in FL intensity with 500 μM Au3+ ions. At pH 7.0, a linear detection range of 0.5–3.5 μM was achieved, with limits of detection (LOD) and quantification (LOQ) of 0.4 and 1.2 μM, respectively. The non-functionalized CQDs effectively detected Au3+ ions in tap, drinking, and river water, acidic mine drainage (sludge), and a standard reference material (CRMSA-C Sandy Soil C), achieving spike recoveries of 96.06%–101.71% with variability below 4.13%.
AtıfScopus5WoS5OpenAlex4İncele - MakaleAçık Erişim2025Scopus SJRQ4September 25, 2024 Yumrukaya-Tatvan (Bitlis, Türkiye) earthquake and a seismo-tectonic evaluation of its impact on the earthquake hazard in the region; [25 Eylül 2024 Yumrukaya-Tatvan (Bitlis, Türkiye) depremi ve bölgedeki deprem tehlikesine etkisi üzerine sismo-tektonik bir değerlendirme]
Öztürk, Serkan; Alkan, Hamdi
The current and future earthquake hazard in and around Bitlis were tired to reveal by utilizing the September 25, 2024, Yumrukaya-Tatvan earthquake (Mw=4.5) and its aftershocks, b-value and Z-value distributions, occurrence probabilities and recurrence periods of earthquakes and variations in Coulomb stress within the scope of this study. Also, it was tried to determine which fault systems in the study area is related to the Yumrukaya-Tatvan mainshock, characterized by strike-slip faulting. b-value in G-R relation was computed as 0.84∓0.06 and small b-values (<1.0) were imaged in the north-northwest-southeast directions throughout the South East Anatolian Thrust Zone and Muş Fault Zone, and west of Lake Van. At the beginning of 2025, significant seismic quiescence was observed near the Muş Fault Zone and the south and southeast of the South East Anatolian Thrust Zone. Recurrence periods for the events with the magnitudes of Mw=5.0, 5.5 and 6.2 were computed as ~10, ~26 and ~100 years, respectively. Additionally, occurrence probabilities of earthquakes with these magnitudes in the intermediate-term (~10 years) were calculated as ~64%, ~32% and ~10%, respectively. Positive Coulomb stress changes carry out a movement from the Kavakbaşı Fault zone in the west and the Beğendik segment in the east toward the South East Anatolian Thrust Zone in the east-southeast. In this region, there is no active fault/fault system according to the General Directorate of Mineral Research and Exploration. Thus, these findings are significant clues showing that multiple parameter seismo-tectonic analyses are important in determining the earthquake hazard for the September 25, 2024 earthquake, and that regions with small b-values and seismic quiescence and regions with positive Coulomb stress changes may indicate current hazard and possible earthquake zones in the future.
AtıfScopus2OpenAlex2TR Dizin1
İncele - MakaleYalnız künye2009Scopus SJRQ1Lithostratigraphy, facies, and deposition environment of the lower Jurassic Ammonitico Rosso type sediments (ARTS) in the Gümüşhane area, NE Turkey: Implications for the opening of the northern branch of the Neo-Tethys Ocean
Kandemir, Raif; Yilmaz, Cemil
Ammonitico Rosso type sediments (ARTS) form the bottom level of the Şenköy Formation in the Gümüşhane area. The formation accumulated in the rift-related basins triggered by extensional tectonic regimes in the Early Jurassic times. Six different sections were studied in this area in order to interpret the lithostratigraphy, facies, and deposition environments of the ARTS. Two basic lithofacies were distinguished, nodular-marly and nodular-calcareous. These facies provide useful information regarding depositional conditions in the area and environmental energy. These factors were mainly related to the relative sea-level that in turn was controlled by tectonic and eustasy conditions. In addition, seven different types of microfacies were recognized and described as a result of the detailed analysis of the sections. The results of the analysis show that these sediments in the Gümüşhane area were developed in transgressive phases/events. These sediments share characteristics with other peri-Mediterranean regions and sea-level curves, and show a similarity to the major transgressive pulse during the Pliensbachian stage. Deposition of ARTS was controlled by syn-depositional extensional movements, leading to their accumulation on top of tilted blocks, slopes and horsts in an open marine environment. The ARTS were developed during the rifting of the continental margins pointing up the phases of the Tethys opening. Neptunian dykes verifying this opening developed at different levels of the ARTS and were filled with overlying sediments. These results support the hypothesis that the ARTS were formed in tectonically active environments where extensional tectonic movements were continuously improved during the deposition of the ARTS.
AtıfScopus136WoS130OpenAlex131İncele - MakaleAçık Erişim2025Scopus SJRQ3Investigation of fractional order covid-19 model with q-homotopy analysis transform method
Merdan, Mehmet; Açikgöz, Pınar
The primary objective of this paper is to derive approximate analytic solutions for the time fractional-order Covid-19 model by employing the q-homotopy analysis transform method (q-HATM) and the Laplace transform homotopy perturbation method (LT-HPM). The covid 19 model is a system of five-dimensional nonlinear ordinary differential equations. Moreover, this method applies even to more complex partial differential equations originating from mathematical biology, demonstrating computational efficiency and wide application. In this study, Caputo fractional derivative is used to obtain the fractional system and Laplace transformation is applied to analyze the approximate solutions of the system. Graphical results are presented and discussed quantitatively to illustrate the approximate solution. Copyright 2021, Yıldız Technical University.
