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 SJRQ1Snow cover detection using remote sensing techniques over different climate zones of Türkiye
Çakir, Günay; Bozali, Nuri; Sivrikaya, Fatih
Snow-covered land surfaces can be easily mapped using remote sensing technologies. Accurate estimation of snow cover on the land surface allows for the construction of water resource management today. Using Landsat TM/ETM + satellite images, this study tried to assess how much snowfall covered the soil in Trabzon, Gümüşhane, and Bayburt provinces between 1999 and 2023. Satellite images were classified into three categories using the ERDAS 9.1 TM software. These classes are classified as snow-covered surfaces, other places, and data loss (cloud-shadow). When performing image analysis, it was important to verify that the cloudiness rate in the images was less than 15%. Images with cloudiness rates of more than 15% were not used. Seasonal and annual trend analysis of snow-covered areas (SCA) over three distinct regions (Trabzon, Gümüşhane, and Bayburt) were examined using the Mann-Kendall test. When three distinct study regions were examined together, Bayburt had the highest SCA rate, followed by Gümüşhane and Trabzon. In all three fields, the highest SCA was recorded in 2000, while the lowest SCA was recorded in 2017. The trends noticed that SCA on both annual and seasonal scales did not reach the statistical significance level of 0.05. Although snowfall in Trabzon, Gümüşhane, and Bayburt was beneficial in the autumn and spring seasons, no statistically significant association was found. The research concluded that the existing data are inadequate to make any statements on the impact of global warming in the area. However, the study figured out that satellite data may be effectively used to identify snowy places as a result of the study. Comparable investigations need to be undertaken in regions with varying climates, utilizing diverse remote sensing data and classification methodologies.
AtıfScopus2WoS3OpenAlex3
İncele - Kitap BölümüYalnız künye2025Strategic Performance Metrics and Innovative Measurement Methods in Public Personnel Management
Şimşek, Tuğçe
Public administration increasingly demands strategic, data-oriented personnel management, yet traditional hierarchical metrics miss dynamic performance and innovation. This chapter examines the limits of conventional measurement in public personnel management and proposes a data-driven, dynamic governance framework. Its aim is to link digitalization with accountability and citizen orientation by specifying strategic indicators and technology-enabled methods. It outlines core concepts, then elaborates on strategic performance indicators and comparative analyses of metrics. It explores advanced methods, including AI-supported tools and continuous learning models, alongside blockchain, big-data analytics, sentiment analysis, and remote-work assessment. Findings show these tools improve transparency and continuous feedback while enabling ethical, auditable evaluation; policy implications for sustainable, evidence-based decision-making are provided.
- MakaleAçık Erişim2025Scopus SJRQ3Relationship between Quality of Life and Suicide Risk in Iranian Cancer Patients: The Mediating Role of Religious Coping
Karimi, Amirreza; Mazhari, Seyed Amirhossein; Mohammadi, Elnaz Malek; Güngör, Sunay; Kalantari, Soheyla; Taebi, Mozhgan; Hamidi, Fatemeh; Farhadi, Bahar
Objective: Cancer patients often experience significant declines in quality of life (QoL), which can elevate suicide risk. In culturally religious societies like Iran, religious coping may serve as a critical buffer against such adverse outcomes. This study examined the relationship between QoL and suicide risk among Iranian cancer patients, with a focus on the mediating role of religious coping. Method: A purposive sample of 350 cancer patients from Tehran was analyzed using validated measures of QoL (EORTC QLQ-C30), suicide risk (Beck Scale for Suicide Ideation), and religious coping (Brief RCOPE-14). Data were analyzed using SPSS v26 and the PROCESS macro v4.0. Results: Bivariate correlations revealed that lower QoL was strongly associated with higher suicide risk (r = -0.62, p < 0.001), while positive religious coping correlated with better QoL (r = 0.48, p < 0.001) and reduced suicide risk (r = -0.41, p < 0.001). Mediation analyses demonstrated that positive religious coping significantly attenuated the QoL-suicide risk relationship (indirect β = -0.09, 95% CI [-0.15, -0.04]), accounting for 17% of the total effect. Negative religious coping, though less prevalent, also mediated this relationship but to a lesser extent (indirect β = -0.03, 95% CI [-0.05, -0.01]). Subgroup analyses indicated that the protective effect of positive religious coping was stronger in advancedstage patients. Conclusion: These findings underscore the importance of integrating spiritual care into oncology settings in Iran, leveraging faith-based resources to enhance resilience and reduce suicide risk. Future research should explore longitudinal and culturally tailored interventions to further elucidate the role of religious coping in cancer survivorship.
- MakaleAçık Erişim2025Scopus SJRQ1The Correlation Between Circulating Fetuin-A Levels and Fetuin-A to Adiponectin Ratio With Obesity in a Turkish Population: A Case-Control Study
Icer, Mehmet Arif; Koçak, Tevfik; Ağagündüz, Duygu; Yıldıran, Hilal
The relationship between serum fetuin-A levels and obesity has not been fully understood. This study aims to elucidate the levels of serum fetuin-A and F/A ratio in obesity and contribute to the literature on whether they could be novel clinical predictors modulated through body composition and nutrition. The study included 73 participants who were obese and 71 participants with normal weight, aged between 18 and 65 years. Certain anthropometric measurements of the individuals were taken, and a body composition analysis was performed. In addition, 3-day food records (consecutive days: 2 weekdays and one weekend day) were taken. Serum levels of fetuin-A (ng/mL) and adiponectin (μg/mL) were measured using an enzyme-linked immunosorbent assay (ELISA) method. The F/A ratio was obtained by dividing fetuin-A (ng/mL) by adiponectin (μg/mL). Serum fetuin-A (ng/mL) level and F/A ratio are higher in obese participants than in normal weight (p < 0.05). Body weight (kg) (r = 0.553, p ≤ 0.001), body mass index (kg/m2) (r = 0.492, p ≤ 0.001), waist circumference (cm) (r = 0.522, p ≤ 0.001), body fat percentage (%) (r = 0.203, p = 0.015), serum fasting blood glucose levels (mg/dL) (r = 0.317, p ≤ 0.001), and dietary protein intake (kg) (r = 0.165, p = 0.048) were observed to be positively correlated with serum fetuin-A levels. Positive correlations were also observed between these parameters and the F/A ratio (p < 0.05). Negative correlations were found between serum adiponectin and these parameters (p < 0.05). In addition, when dietary cholesterol intake was kept constant, a 1-unit increase in dietary energy intake (kcal) resulted in a 0.043-fold increase in serum fetuin-A (p < 0.05). The study results support theories suggesting the involvement of serum fetuin-A levels and the F/A ratio in the pathogenesis of obesity. The higher serum fetuin-A levels and F/A ratio found in obese participants may be considered as new clinical determinants that could be regulated through body composition and nutrition.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1Bio-Psychosocial Dimension of Hemodialysis and Spiritual Coping Strategies: A Phenomenological Study on Patient Experiences in Türkiye
Demir Çam, Sevgi; Uzun, Sevda
This study aimed to examine the bio-psychosocial experiences of patients living in Türkiye receiving hemodialysis treatment and to examine their spiritual coping strategies. A descriptive phenomenological research methodology was used in this study. This study was conducted with 23 hemodialysis patients, and interviews were conducted individually and face to face. The data were analyzed using Colaizzi’s phenomenological analysis method. The data analysis revealed four categories and thirteen main themes. It was concluded that the prolonged hemodialysis process negatively affected patients with chronic kidney disease bio-psychosocially, yet some patients used spiritual coping strategies to cope with the disease effectively. Spirituality is believed to be influential in dealing with the disease.
AtıfScopus1WoS1OpenAlex2İncele - MakaleAçık Erişim2025Scopus SJRQ2Effectiveness of Psychosocial Interventions in Alcohol and Substance Use Disorders: A Meta-Analysis Study
Helvacı Çelik, Fatma Gül; Bayrak, Nurten Gülsüm; Uzun, Sevda
Alcohol and substance use disorders (ASUD), are increasing worldwide, and these psychiatric disorders are difficult to treat. The search for new treatments for these disorders continues. Psychosocial interventions (PI) are among them, and it is important to evaluate their effectiveness. This study aimed to assess the effectiveness of PI applied to individuals with ASUD. This meta-analysis was conducted by searching PubMed, Web of Science, EBSCOhost, Google Scholar, and YOK Thesis Center databases without year restrictions between October and December 2023. After reviewing the studies, 18 research articles were included in the analysis. The meta-analysis revealed that PI applied to individuals with ASUD were effective in reducing depression (SMD: −0.753, 95% CI: −1.215 to −2.91; I2 = 94.515; p < 0.05) and enhancing self-efficacy (SMD: 0.709, 95% CI: 0.096–1.321; I2 = 93.34; p < 0.05). However, these interventions were not found to be effective in improving self-esteem (SMD: 0.655, 95% CI: −1.641 to 0.331).
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ2Bibliometric analysis of the results of Reiki research
Demir Doğan, Melike
Introduction: This study analyses bibliometric indicators to assess global research trends on Reiki, including publication patterns and key contributing countries. Methods: The publications included in Web of Science (WOS) databases between 1970 and 2024 were reviewed. The WOS database was searched using TS= “REIKI” and all WOS indexes were included. This search identified 414 studies. Among them, letters (n = 7), editorial materials (n = 19), book reviews (n = 9), corrections (n = 2), art and poetry (n = 1), news (n = 1), and retracted publications (n = 1) were removed. The remaining 374 articles were included in this bibliometric analysis. The R-package for bibliometric analysis (Bibliometrix) was used. Results: The bibliometric analysis found that researchers published Reiki-related studies between 1983 and 2024, with a publication growth rate of 4.47 %. On average, articles were 9.5 years old and received 13 citations per document. The total number of keywords identified by the authors was 553, the number of authors in the articles was 1124 authors, the number of single-author articles was 70, the average number of publications per author was 3.5, and international co-authorships were 7.219 %. The USA, Brazil, the United Kingdom, Canada, and Turkiye were the top five countries that published on Reiki, respectively. The USA, Canada, the United Kingdom, Australia, and Turkiye were the top five countries with the most cited articles, respectively. Vitale A. is the most cited author. Journal of Alternative and Complementary Medicine is the most cited journal. Conclusion: This study is the first of its kind to evaluate the articles written by researchers in the field of Reiki only. Despite the difficulties researchers experienced in the field of Reiki, the studies have increasingly been conducted in this field over the years and have been cited studies more. This study may be helpful for researchers to determine productive countries, journals, authors, and emerging trends in Reiki by providing comprehensive analyses and structured information on this subject.
- MakaleYalnız künye2025Scopus SJRQ1Tectonic structures of Lake Eğirdir (SW Türkiye) revealed by magnetic analysis
Aktaş, Gülten; Hisarlı, Z. Mümtaz; Öksüm, Erdinç
Lake Eğirdir, located within the tectonically complex Isparta Angle of southwestern Türkiye, hosts an actively deforming transtensional basin shaped by multidirectional stresses. Although the surrounding fault systems have been studied previously, the subsurface fault architecture beneath the lake remained largely unresolved. Understanding the lake's subsurface tectonic framework is crucial for regional geological and seismic assessments. This study addresses this gap by applying traditional and advanced edge detection techniques to identify magnetic lineaments and assess their connection with surrounding faults using newly acquired high-resolution magnetic data, corrected for noise and distortions. The distinct magnetic lineaments identified confirm a structural connection on land with the regional fault network around the lake, also showing their continuity under the lake. The results reveal dominant NW-SE and E-W trending magnetic lineaments. The most prominent structure identified within the lake is a NE-SW fault that cuts the NW-SE anomalies and is spatially related to the Yaka Fault on land. Its continuation beneath the lake is confirmed by clustered seismicity and normal fault-type focal mechanisms, indicating active transtensional deformation. These findings highlight active faulting processes that continue to shape the lake basin and contribute to understanding regional seismic hazards. Integration of magnetic, bathymetric, seismic, and geodetic datasets reveals that Lake Eğirdir acts as a dynamic neotectonic transfer zone within the Isparta Angle, facilitating the westward extrusion of the Anatolian Plate.
AtıfScopus1WoS1İncele - MakaleAçık Erişim2025Scopus SJRQ3Development of the Disaster Risk Perception Scale: Evaluation of Its Impact on Disaster Preparedness
Kiymis, Ibrahim; Kaya, Afsin Ahmet
Objectives:Developing a disaster risk perception scale is a critical component of Disaster Risk Management (DRM), enabling the assessment and evaluation of the reactions, behaviors, and risk culture characteristics of individuals living under disaster risk. The objective of this study is to develop a disaster risk perception scale and to assess its effect on disaster preparedness. Methods: A pilot study was conducted with 359 participants, followed by a main study involving 786 participants. All participants resided in Giresun and Elazig, Turkey, the regions recently affected by earthquakes, floods, and landslides. Results:A reliable and valid disaster risk perception scale with 25 items and 5 dimensions (exposure/impact, probability, uncontrollable, worry/fear, and vulnerability) was developed. The disaster risk perception of the participants differed significantly according to their educational level, income level, city of residence, and disaster education. As per the multiple regression analysis, the exposure/impact and worry/fear variables had positive and significant effects on disaster preparedness. Conclusions:For future studies, it is recommended to implement the disaster risk perception scale across diverse disaster types to assess and evaluate the outcomes effectively.
AtıfScopus11WoS9OpenAlex15İncele - MakaleAçık Erişim2025Scopus SJRQ1Adoption of AI-based order picking in warehouse: benefits, challenges, and critical success factors
Rad, Fakhreddin Fakhrai; Oghazi, Pejvak; Onur, İzmir; Kordestani, Arash
This research assesses the adoption of artificial intelligence (AI)-based batch order picking in a warehouse, focusing on benefits, challenges, and critical success factors. Using customer order data and simulation, the study employs a quantitative approach, combining mathematical and statistical estimations with qualitative examinations centered on interviews with the warehouse staff, its Enterprise Resource Planning (ERP) developer, and the AI developer. The findings of this mixed-method study reveal that the AI-based order-picking system (AI-based system) has improved order-picking efficiency by reducing travel distance and time. Nevertheless, challenges hinder maximum utilization of the system. In addition, the research highlights critical success factors and other benefits of adopting the system tailored to warehouse management. Understanding the lessons learned in this research is essential for businesses seeking to adopt AI to enhance their efficiency.
AtıfScopus13WoS5OpenAlex5İncele - MakaleAçık Erişim2025Scopus SJRQ1Supervised classification-based framework for rock mass discontinuity identification using point cloud data
Günen, Mehmet Akif; Öztürk, Kaşif Furkan; Aliyazıcıoğlu, Şener
Mapping and evaluating rock mass discontinuities using point clouds is a critical task in mining, civil, and geological engineering. Rock discontinuities can significantly impact the integrity, strength, and stability of rock masses. The orientation of these discontinuities is also a key characteristic of the rock mass. Accurate orientation estimation from point clouds enables more precise predictions of rock mass behavior, leading to improved safety, more efficient excavation processes, reduced operational costs, and significant time savings. In this context, a supervised classification-based framework is proposed for calculating orientation parameters from point cloud. Supervised classification plays a crucial role in tasks where a model learns complex patterns from labeled data to accurately predict previously unseen instances. The proposed method consists of eight-steps, including: data collection, pre-processing (data filtering), adaptive neighborhood size selection (omnivariance-based), feature extraction (geometric features), feature selection (Minimum Redundancy Maximum Relevance method), classification (Support Vector Machine), clustering (connected component labeling), and plane fitting to calculate orientation parameters (dip angle and dip direction). The framework was applied to two real-world datasets and one synthetic dataset, which was tested in two different subsampled forms (random and uniform subsampling). The results statistically demonstrated that the technique was effective in detecting and characterizing rock mass discontinuities with high Accuracy, Recall, Precision, and F-Score values ranging from 94.64% to 99.57%. The deviations of the method in the measurements of the dip angle and the dip direction, compared to the manual measurements, range from 1% to 4%, indicating strong agreement with the manual measurements and the existing studies.
AtıfScopus25WoS24OpenAlex26İncele - DüzeltmeAçık Erişim2025Scopus SJRQ2Correction to: Micro-encapsulation exhibits better protection than nano-encapsulation on phenolics before and after in vitro digestion (Journal of Food Measurement and Characterization, (2024), 18, 12, (9890-9905), 10.1007/s11694-024-02927-7)
Şensu, Eda; Altuntaş, Ümit; Gültekin-Özgüven, Mine; Duran, Ayhan; Özçelik, Beraat; Yücetepe, Aysun
The original version of this article unfortunately contained error in co-author’s affiliation. The affiliation of author Ümit Altuntaş were incorrectly given as Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak, Istanbul TR-34469, Turkey but should have been Department of Food Engineering, Gümüşhane University, Gümüşhane, Turkey. The original article has been corrected.
- MakaleYayıncıda açık erişim2025Scopus SJRQ2A quantitative analysis on the effect of crystal parameters on full energy peak efficiency of a coaxial high purity Germanium detector for the energy range 50 keV-2.5 MeV
Çelik, Necati
High Purity Germanium (HPGe) detectors are essential instruments in gamma-ray spectrometry, offering high sensitivity and exceptional energy resolution. The full-energy-peak (FEP) efficiency is a critical parameter that influences the accuracy of activity concentration measurements of radionuclides. This study examines the FEP efficiency of a coaxial HPGe detector, focusing on variations in crystal length, crystal radius, and crystal hole dimensions. For varying crystal lengths, the efficiency values show negligible differences at low energy (50 keV) but significant increases at higher energies, indicating that longer crystal lengths enhance efficiency. Similarly, the efficiency increases with larger crystal radii across all energy levels suggesting substantial efficiency gains even at low energies. However, variations in crystal hole radius and depth, exhibit minimal impact on FEP efficiency across all tested energy levels. These findings highlight that optimizing crystal length and radius is more crucial for changing detector efficiency compared to modifying hole dimensions, providing valuable insights for optimizing Monte Carlo models and detector design.
AtıfScopus4WoS5OpenAlex3İncele - MakaleAçık Erişim2025Scopus SJRQ1Integration of Maqaṣid al-Shari'ah in the Criminal Law Reform to Achieve Justice and Human Dignity
Ibrahim, Zumiyati Sanu; Karimullah, Suud Sarim; Assaad, Andi Istiqlal; Septiani, Rina; Okur, Huseyin
Inthispostmodernera,whentheboundariesbetweenlocalandglobalare increasingly blurred, efforts to build a contextual,ethical,andresponsive criminal justice systemhavebecomeanurgentnecessity.Thisstudyaims to propose a model of criminal law reform based on maqaṣ̣id al-shari'ah that is more humane and just, emphasizing not only the imposition of sanctions or punishments but also the rehabilitation and restoration of offenders.Thisstudyisnormative-juridical,employingadoctrinalanalysis approach and reinforced by various relevant legal theories to provide a philosophical foundation for evaluating the application of maqaṣid al-shari'ahincontemporarycriminallawneeds.Theresultsstatethatthe integration of maqaṣid al-shari'ah in criminal law reform in Muslim-majority countries, including Indonesia, should not be viewed merelyasasymbolicmoderationbetweenreligiouslawandhumanrights, but as a transformative project that requires epistemological courage to overhaul the classical view of legal authority and the meaning of justice. Amidst the wave of globalization that challenges the supremacy of religiouslawanddemandsstrongerprotectionofhumandignity,maqaṣid ispresentnotmerelyaspassivetheologicalvalues,butasactiveprinciples that require that law protect life, reason, freedom, and social welfare in concrete and measurable ways. The path toward integrating maqasid-based criminal law principles into the modern criminal legal systems of majority-Muslim countries is not a short-term project, as it requires a paradigm shift from a textualist approach to a contextual approach, from legalism to humanism, and from conservatism to intellectual courage.
AtıfScopus8OpenAlex2İncele - MakaleAçık Erişim2025Scopus SJRQ1Through the eyes of healthcare professionals: Compassion fatigue and earthquake stress coping strategies of healthcare professionals in the disaster region following the Kahramanmaras centered earthquakes: A case-control study
Emirza, Elif Güzide; Uzun, Sevda; Şenses, Medine
Background: Healthcare professionals serving in the earthquake zone may experience mental problems due to the traumatic events they witnessed. Aim: The aim of this study was to evaluate the effect of working in earthquake-affected areas on compassion fatigue and coping strategies for earthquake stress in healthcare professionals compared to a control group. Methods: This descriptive and correlational study was conducted in three provinces in the northern region of Türkiye. The sample of the study consisted of 146 healthcare professionals working in earthquake-affected regions and 143 healthcare professionals not working in earthquake-affected regions. Data were collected using the ‘Descriptive Information Form’, ‘Compassion Fatigue Short Scale (CF-SS)’, and ‘Coping with Earthquake Stress Scale (CESS)’. Descriptive statistics, t-test for independent samples, Pearson correlation analysis and binary logistic regression analysis were used to analyze the data. Results: Statistically significant differences were found between healthcare professionals working in earthquake-affected regions and healthcare professionals not working in these regions in terms of CF-SS total scores, ‘occupational burnout’ sub-dimension mean scores and ‘seeking social support’ mean scores among CESS sub-dimension mean scores (p <.05). However, no statistically significant difference was found between the mean scores of ‘secondary trauma’ sub-dimension of CF-SS and total-CESS, ‘religious coping’, and ‘positive reappraisal’ (p >.05). A high and positive correlation (r =.805; r =.847; r =.847; r =.695, p <.001) was found between total CF-SS scores and total religious coping, positive reappraisal and seeking social support scores of the participants. In addition, working in the earthquake zone negatively affects positive reappraisal and positively affects seeking social support as a significant predictor (β =.081, OR = 0.922, p <.05; β =.111, OR = 1.117, p <.05). Conclusion: A significant positive relationship was observed between compassion fatigue and coping with earthquake stress. At the same time, it was determined that having worked in the regions affected by earthquakes had a strong positive effect on coping strategies with earthquake stress.
AtıfScopus4WoS3OpenAlex5İncele - MakaleAçık Erişim2025Scopus SJRQ3Investigation of new mixtures based on natural rubber and nitrile-butadiene rubber for high damping base isolation systems
Çavdar, Özlem; Yıldız, Zeynep; Naghshineh, Ali Karimzadeh
High damping rubber isolators (HDRBs), which are popular in base isolation systems, extend the natural vibration periods of structures and increase the energy dissipation capacity of the systems. Thus, they can protect structures from damage that may occur in earthquakes. The difference between HDRBs and other elastomer bearings is the chemical formulation of the rubber used. The aim of this study is to prepare a new rubber mixture that is resistant to seismic loads and has good damping properties for HDRBs. In this direction, rubber mixtures were prepared with three different formulations. The mixture of ingredients used in this study is Natural Rubber (NR), Nitrile Butadiene Rubber (NBR), Carbon Black (CB), process oil, Zinc Oxide (ZnO), Stearic Acid (StA), coumaron resin, protective agent, sulfur and accelerators. Quadruple shear block specimens were produced with elastomers produced with mixtures. Dynamic tests were performed on these samples. Elastomer earthquake isolation bearings with a damping ratio of 6% or greater are classified as ‘highly damped’. In this study, values greater than 10% were obtained for damping ratio values at 100% shear stresses. Experimental and numerical analyses revealed that the damping values of the compounds developed with NBR-based formulations are at an acceptable level for highly damped isolators. In general, it was observed that the damping properties increased from 6% to 12%. Therefore, it is thought that the developed HDRB compounds can be used as elastomers in the construction of seismic isolators with high damping properties.
AtıfScopus4WoS3İncele - MakaleAçık Erişim2025Scopus SJRQ2Intersession Robust Hybrid Brain–Computer Interface: Safe and User-Friendly Approach with LED Activation Mechanism
Aydın, Sefa; Melek, Mesut; Gökrem, Levent
This study introduces a hybrid Brain–Computer (BCI) system with a robust and secure activation mechanism between sessions, aiming to minimize the negative effects of visual stimulus-based BCI systems on user eye health. The system is based on the integration of Electroencephalography (EEG) signals and Electrooculography (EOG) artefacts, and includes an LED stimulus operating at a frequency of 7 Hz for safe activation and objects moving in different directions. While the LED functions as an activation switch that reduces visual fatigue caused by traditional visual stimuli, moving objects provide command generation depending on the user’s intention. In order to evaluate the stability of the system against physiological and psychological conditions, data were collected from 15 participants in two different sessions. The Correlation Alignment (CORAL) method was applied to the data to reduce the variance between sessions and to increase stability. A Bootstrap Aggregating algorithm was used in the classification processes, and with the CORAL method, the system accuracy rate was increased from 81.54% to 94.29%. Compared to similar BCI approaches, the proposed system offers a safe activation mechanism that effectively adapts to users’ changing cognitive states throughout the day by reducing visual fatigue, despite using a low number of EEG channels, and demonstrates its practicality and effectiveness by performing on par or superior to other systems in terms of high accuracy and robust stability.
AtıfScopus2WoS1OpenAlex2İncele - MakaleAçık Erişim2025Scopus SJRQ1Solving the Dynamic Stability Challenge of Automatic Gain-Controlled Phase-Locked Loops: A Robust Alternative via Enhanced SRF-PLL Design and Implementation
Yanarateş, Cağfer; Altan, Aytaç
This study presents a robust alternative to conventional phase-locked loop (PLL) architectures through the design and real-time implementation of an enhanced Synchronous Reference Frame Phase-Locked Loop (SRF-PLL) for single-phase inverter systems. Targeting the inherent dynamic stability limitations of Automatic Gain-Controlled PLLs (AGC-PLLs), the proposed SRF-PLL demonstrates superior performance in transient response and tracking accuracy. Comparative evaluations under diverse dynamic operating conditions—including phase angle jumps, voltage sags/swells, frequency steps, noise, and harmonic distortion—highlight its resilience and adaptability. Experimental results reveal a substantial improvement in dynamic response, achieving 2.5 to 6 times faster settling times depending on the operating condition. Moreover, peak-to-peak oscillations were significantly suppressed, with deviations reduced from 2° to nearly 0° under a 5 Hz frequency step scenario, even in the presence of 3rd order harmonic injection. For a 40° phase angle step, the proposed system achieves a fivefold improvement in attenuation time (0.03 s vs. 0.11 s) compared to the AGC-PLL. Under voltage sag conditions with noise and 3rd order harmonic injection, the enhanced SRF-PLL reduces the attenuation time from 0.2 s to 0.08 s. During voltage swell scenarios, it further improves the response time from 0.025 s to 0.01 s. These findings confirm the practical benefits and efficiency of the enhanced SRF-PLL for applications requiring precise and reliable phase tracking and synchronization.
AtıfScopus20WoS19OpenAlex14İncele - MakaleAçık Erişim2025Scopus SJRQ1Incorporation of ultrasound-assisted treatment in cheese to accelerate ripening of Kaşar cheese: Changes in cheese microbiota, proteolysis, enzyme activities and volatile profiles
Yılmaz, Fırat; Dağdemir, Elif; Hayaloğlu, Ali Adnan
This study aimed to assess the impact of using LAB strains (Lactobacillus helveticus DPC 4571 and Lactobacillus casei ATCC 334) directly or after sonication on the quality and ripening of Kaşar cheese. Experimental cheeses were produced with a combination of cheese starters (Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus), adjuncts and sonicated cultures. The cheeses showed remarkable variations in titratable acidity and pH. The bacterial counts showed that sonication was effective on adjunct cultures, causing faster and stronger autolysis of L. helveticus DPC 4571 and an increase in L. casei ATCC 334 during ripening. Cheeses containing adjunct cultures exhibited higher proteolysis, with increased hydrolysis of αs1- and β-caseins. Aminopeptidases activities increased during ripening by adjuncts and sonicated-adjunct cultures. The use of adjunct culture resulted in a greater increase in the free amino acid content. Adjuncts and sonicated-adjunct cultures increased both the quantity and diversity of some volatiles. In conclusion, the inclusion of sonicated culture in the starter system offered a potential approach to accelerate cheese ripening and improve cheese quality.
AtıfScopus10WoS8OpenAlex7İncele - MakaleAçık Erişim2025Scopus SJRQ3Spatial and temporal analysis of seismicity and seismotectonic parameters in Albania region
Ormeni, Rrapo; Öztürk, Serkan; Silo, Erald; Bozo, Rrezart; Hoxha, Ismail; Mucaj, Dionald
A comprehensive analysis of b-value for the Albanian earthquakes was conducted using the instrumental earthquake catalogue of Albanian region. A total of 38,816 seismic events with magnitudes ML> 0.1 on the Richter scale were utilized. Statistical characteristics of the seismicity were examined based on b-value, as defined by the Gutenberg-Richter law. Considering the magnitude completeness (Mc-value) as 2.7, b-value was estimated as 1.09 ± 0.08 and it indicates a normal stress regime in the region. The Mc-value varies from 1.5 to 3.4, and spatial distribution of b-value ranges from 0.79 to 1.16. Higher b-values (> 1.0) were detected in the southernmost part of Albania, whereas lower b-values (< 1.0) were found in the western part, particularly within the Adriatic-Ionian fault zone and the Lushnje-Elbasan-Dibër transversal fault zone, as well as in the south-eastern Leskovik-Erseka-Korça fault zone. Regions with lower b-values correspond to areas with larger-magnitude events, while higher b-values are associated with smaller earthquakes. These findings suggest that b-values across Albania generally round 1.0, with lower values indicating moderate stress accumulation in the western region and within two other active seismic belts. The b-values less than 1.0 may signal areas of increased seismic potential. The occurrence probability of earthquakes across varying magnitudes was found to be very high (99%-100%) for seismic events with ML between 0.5 and 4.5, and lower (less than 95%) for events with ML > 5.5; it varied from 1% to 60% for events with larger ML > 6.0 for different Tr values. Recurrence periods for smaller magnitudes are relatively short (less than 1 year for magnitudes from 1.0 to 4.2), whereas for larger magnitudes (5.0 to 6.0), recurrence periods are longer, about 100 years. The Albanian region is characterized by a complex geological setting and significant seismic activity, and, thus, it can be stated that these types of analyses may be important in terms of seismotectonic evaluation and seismic hazard.
AtıfScopus1WoS1OpenAlex3İncele