Gümüşhane ÜniversitesiGümüşhane ÜniversitesiAçık Erişim Arşivi · RDL Open

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  • MakaleAçık Erişim2026
    An Approach to the Evaluation of Spent Coffee Grounds: Use in Functional Apricot Bar Formulation

    Berktaş, Serap; İncegül, Yasemin; Çam, Mustafa

    Fruit bars are snack products obtained by mushing fruit, adding sugar, pectin, and other ingredients, and drying the resulting mixture. The aim of this study was to investigate the effects of spent coffee grounds (SCGs), a valuable waste product of the coffee industry, on the physicochemical and bioactive properties of a snack fruit bar enriched with bioactive properties after mushing apricot fruit. Results showed that apricot bars containing 2.5%, 5%, and 7.5% SCGs had higher phenolic, flavonoid, antioxidant activity (ABTS and DPPH), ascorbic acid, and total carotenoid contents compared to the control group. Especially, the fruit bar containing 7.5% SCG stood out in terms of tested bioactive properties. Therefore, it has been determined that the antioxidant and phenolic compounds found in SCGs are also reflected in fruit bars. Furthermore, α-amylase and lipase inhibition values were increased in the enriched fruit bars, and the potential of the developed fruit bars to exhibit antidiabetic and antiobesity properties was improved. Furthermore, the intestinal phase phenolic compound bioaccessibility values of the enriched fruit bars (87.40%–133.3%) were higher than the SCG-free control fruit bar (91.7%). The potential for creating an alternative product with improved nutritional and economic benefits by adding a waste product rich in bioactive compounds such as SCGs to the fruit bar formulation was evaluated. Such products could be considered a new alternative to a functional snack product group rich in bioactive substances that could be incorporated into today's diet.

    • SDG 2 · Açlığa Son
    • SDG 3 · Sağlık ve Kaliteli Yaşam
    • SDG 12 · Sorumlu Üretim ve Tüketim
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  • MakaleAçık Erişim2026
    Non-Alcoholic Beer Production Using Ohmic Heating-Assisted Vacuum Distillation Method

    Akdoğan, Arda; Baltacı, Cemalettin

    In this study, non-alcoholic beer was produced with an ohmic heating-assisted vacuum distillation system (ODVD) and vacuum rotary distillation (VDD). The processes were conducted at three vacuum pressure levels (100, 150, and 200 mbar). Corresponding operating temperatures were 50, 58, and 67°C for the VDD system, while the ODVD system operated at in-situ-ohmic heating without an external heating medium. In ODVD, three voltage gradients (15, 20, and 25 V/cm) were applied. The two systems were compared in terms of processing time, energy efficiency, aroma profile, antioxidant capacity (ABTS, DPPH, TAC, FRAP), total phenolic (TPC) and total flavonoid content (TFC), vicinal diketone (VDK), pH, color, and bitterness value. The ODVD system showed significantly shorter processing times and energy efficiency than VDD. While the pH values of dealcoholized beer increased slightly compared to the original beer, color and bitterness values were higher in VDD samples. Aroma compounds such as ethyl acetate, isoamyl acetate, and ethyl caproate were lost during both processes. Overall, the findings demonstrate that ODVD is a promising and energy-efficient alternative for the production of non-alcoholic beer, with comparable product quality to VDD.

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  • MakaleYayıncıda açık erişim2026
    The Effect of Music-Repeating Robotic Parrot Therapy and Different Instrumental Live Music Therapies on Anxiety and Fatigue Levels in Hemodialysis Patients: A Randomized Controlled Trial

    Demirağ, Hatice; Cin, Aynur; Aktepe Coşar, Dilan; Uzun, Sevda; Türkmen, Osman Oğulcan

    Aim: This study aimed to evaluate the effects of three different music-based interventions on anxiety and fatigue levels in patients undergoing hemodialysis, compared to a concurrent control group receiving standard care. Methods: This randomized controlled trial involved 64 patients receiving maintenance hemodialysis. They were randomly assigned to four equal groups (n = 16 each): live music, live ney sound therapy (using a traditional reed flute known for its soothing, breath-like tones), a music-repeating robotic parrot therapy (an interactive robotic parrot that repeats music or sounds provided by the patient), or a control group (no intervention). The experimental groups received 30-min sessions 3 days per week for 2 months. The “Beck Anxiety Scale” and “Fatigue Severity Scale” were used to measure anxiety and fatigue, respectively. Assessments were performed before the intervention, immediately after the 2-month intervention period, and at 2 months after the end of the intervention period. Results: Before the intervention, there were no significant differences in anxiety or fatigue scores across the four groups (p > 0.05). After the interventions, all three groups exposed to music therapy showed significant reductions in both anxiety and fatigue scores compared to the control group (p < 0.001). Conclusion: All three therapies were effective in managing anxiety and fatigue symptoms in hemodialysis patients. Among them, music-repeating robotic parrot therapy demonstrated the most superior and longest-lasting effects in reducing both anxiety and fatigue levels. Trial Registration: ClinicalTrials.gov identifier: NCT07238374.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    İncele
  • MakaleYalnız künye2026
    Reflections of Employees' Digital Addiction Experiences on Workplace Distraction, Safety Perception, and Collective Responsibility: A Phenomenological Study

    Doğan, Onur

    This study aims to examine how digital addiction based experiences of employees influence attention processes, safety awareness, and collective responsibility in the workplace. It particularly seeks to identify challenges in digitally intensive environments regarding cognitive load, behavioral reflexes, and institutional risk communication. The research employed a phenomenological design with semi- structured interviews conducted with 19 employees from various sectors across Turkey. Criterion sampling was used, and interviews continued until data saturation was reached. All interviews were audio recorded, transcribed verbatim, and analyzed using Colaizzi's (1978) seven step method. Reporting followed the COREQ checklist to ensure rigor and transparency. Thematic analysis revealed three main themes: Cognitive Load and Deterioration in Safety Perception, Behavioral Disconnection and Erosion in Safety Attitudes, and Organizational Silence and Collective Collapse in Risk Awareness. These findings show that digital addiction negatively affects attention, reflexes, safety behaviors, and institutional reporting processes. Digitalization influences not only work efficiency but also employees' safety behaviors and organizational risk communication. Constant digital stimuli cause distraction, disrupt safety practices, and weaken collective responsibility. The study provides insights into how digital addiction transforms workplace safety culture and recommends comprehensive prevention strategies for employers, managers, and policymakers.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    • SDG 8 · İnsana Yakışır İş ve Ekonomik Büyüme
    İncele
  • MakaleAçık Erişim2026
    Synthesis, Characterization, Biological Properties, and Sensor Applications of Novel Thiosemicarbazone Derivatives

    Gezegen, Hayreddin; Özbek, Oguz; Topal, Meryem; Şahin, Hatice; Koçyiğit, Ümit M.

    In this study, novel thiosemicarbazone derivative molecules (5a–j) were synthesized. The characterization of the synthesized molecules was carried out using 1H–, 13C–NMR, FT–IR, and Q–TOF spectroscopic techniques. Then, the inhibitory effect of these compounds was examined for human carbonic anhydrase I and II (hCA I, and II) and acetylcholinesterase (AChE). The hCA I II, and AChE were efficiently inhibited by synthesized thiosemicarbazone derivatives, with Ki values in the range of 0.293–1.666 µM for hCA I, 0.298–1.332 µM for hCA II, and 52.51–138.63 µM for AChE, respectively. Finally, the sensor properties of the synthesized thiosemicarbazone derivatives were investigated. The newly synthesized thiosemicarbazone derivative molecules exhibited high selectivity towards Pb2+ ions. The sensor prepared with 5a from these molecules had a Nernstian behavior of 28.8 ± 1.5 mV/decade and a low detection limit of 2.86 × 10−6 M in a wide concentration range of 1.0 × 10−1–1.0 × 10−5 M. The newly proposed sensor also had a wide pH working range (5.0–10.0), a very fast response time (5 s), and good reproducibility. The newly fabricated sensors were used as indicator electrodes for the potentiometric titration of Pb2+ ions with ethylenediaminetetraacetic acid (EDTA) and were successfully applied for the determination of Pb2+ ion content in different water samples.

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  • MakaleAçık Erişim2026
    Biochemical Profiles of Three Bryophytes: Sphagnum papillosum, Rhytidiadelphus triquetrus, and Ditrichum gracile

    Okan, Onur Tolga; Baltaci, Cemalettin

    This study compared Sphagnum papillosum, Rhytidiadelphus triquetrus, and Ditrichum gracile in terms of total phenolic content (TPC), total flavonoid content (TFC), antioxidant activities (DPPH, ABTS, ferric reducing antioxidant power [FRAP]), phenolic profiles, fatty acid compositions, and mineral contents. S. papillosum had the highest TPC (986.11 mg GAE/kg) and ABTS activity (9732.14 mg Trolox/kg). R. triquetrus showed the highest TFC (874.01 mg QE/kg) and was rich in protocatechuic (18 803 mg/g) and 4-hydroxybenzoic acids (23.219 mg/g). Although D. gracile had lower antioxidant activity, it contained high lipid (6.71%) and ash (27.66%) levels, along with substantial potassium (73 573.86 mg/kg) and calcium (26 135.94 mg/kg) accumulation. Palmitic acid (C16:0) was the dominant fatty acid in all species. These results demonstrate significant biochemical variation among the studied mosses, underlining their potential as sources of natural antioxidants, bioindicators of environmental stress, and candidates for bioremediation.

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  • MakaleAçık Erişim2026
    Between Survival and Sacrifice: Marital Experiences of Patients Undergoing Hemodialysis

    Çakmak, Seher; Karataş, Hicran

    The study aimed to explore the lived experiences of married dialysis patients on the national organ waiting list, focusing on the interplay between illness, familial roles, and societal norms. This research is a qualitative study using semi-structured interviews and participant observation. The study involved 23 marriage-experienced hemodialysis-dependent patients (13 women, 10 men) on the national organ waiting list, recruited between August 16 and November 11, 2022. Data were collected through interviews and observations and were analyzed thematically to identify recurring patterns. Chronic kidney disease (CKD) poses significant physical, psychological, and social burdens, particularly for hemodialysis-dependent patients. Five main themes emerged from this study: (1) When Care Becomes a Test, (2) Dealing with Social Isolation, (3) Sacrifices to Sustain the Marriage, (4) Uninvited voices, (5) Resentful but Thankful. These findings highlight the need for family-centered care that considers diverse family structures and social contexts, while also demonstrating the impact of prolonged hemodialysis (HD) and marital strain on emotional and sexual intimacy.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
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  • MakaleYalnız künye2026
    Phenolic Profiling of Laurus nobilis by LC–ESI–MS/MS: In Vitro Bioactivities and In Silico Enzyme Docking

    Bak, Funda Erşen; Canbolat Gültekin, Deniz; Akmeşe, Osman; Atalay, Abdurrahman; Turan, İbrahim; Gültekin, Ergün; Demir, Selim; Aliyazicioglu, Yüksel

    This study evaluated the branch, leaf, and fruit extracts of Laurus nobilis collected from Artvin in terms of phenolic composition, antioxidant, antimicrobial, and antidiabetic activities and additionally investigated the binding of selected phenolics to α-amylase/α-glucosidase targets through molecular docking. Using LC–ESI–MS/MS analysis, 31 phenolic compounds were quantitatively identified, with epicatechin, luteolin-7-O-glucoside, and rutin predominating particularly in the branches and leaves. Antioxidant capacity was higher in branches and leaves (total phenolic content [TPC]/FRAP/DPPH IC50: branches and leaves, respectively, 95.27–60.84 mg gallic acid equivalent [GAE]/g, 206.16–162.05 mg Trolox equivalent [TE]/g, and 46.95–113.49 µg/mL). Antimicrobial activity was observed within a minimum inhibitory concentration (MIC) range of 1.25–10 mg/mL; leaves exhibited the strongest effect against Bacillus cereus (1.25 mg/mL), whereas fruits were most effective against Candida albicans (1.25 mg/mL). In antidiabetic evaluation, fruits yielded the lowest IC50 values against α-amylase and α-glucosidase (4.31 and 8.97 mg/mL, respectively), suggesting a “composition-over-quantity” effect despite low total phenolic content. Docking results supported high binding affinities of rutin (α-glucosidase −9.3 kcal/mol; α-amylase −8.1 kcal/mol) and luteolin (−8.6 kcal/mol for both enzymes). Overall, although branches and leaves exhibited strong antioxidant profiles, fruits showed more pronounced inhibitory effects on digestive enzymes; therefore, fractionation studies and in vivo/kinetic validations are recommended.

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  • MakaleAçık Erişim2026
    Depositional Setting of Eastern Sakarya Zone (NE Türkiye): Late Cretaceous–Paleogene Period Biostratigraphy, Sedimentology and Tectono-Sedimentary Basin Evolution

    Köroğlu, Fatih

    This study reconstructs the late Campanian–Thanetian tectonic and sedimentary evolution of the Eastern Sakarya Zone Basin (Türkiye) during the closure of the Neotethys Ocean, through the integration of tectonic, biostratigraphic and sedimentary data from three distinct tectonic regions: a northern back-arc basin, a central magmatic arc and a southern fore-arc basin. Analysis reveals a northwest-southeast trending basin with pronounced lateral variations: sediment thickness increases west-to-east, while facies transition from pelagic (north) to neritic (south) carbonate. The succession records a shift from late Campanian–Danian pelagic back-arc carbonates, through a Maastrichtian–early Danian hiatus, to late Maastrichtian–Danian hemipelagic-neritic carbonates, culminating in a Selandian–Thanetian neritic platform. The study proposes the first integrated facies model for the Eastern Sakarya Zone, linking its stratigraphic architecture to regional geodynamics. This establishes a new tectonically controlled carbonate sedimentation model for the Eastern Sakarya Zone Basin, critical for understanding basin evolution from pelagic to neritic carbonate systems in a closing ocean setting.

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  • MakaleYayıncıda açık erişim2026
    Production and Multi-Criteria Evaluation of Healthy White Cheese Snacks Using Microwave-Vacuum Drying

    Ayrancı, Vasıf Kubilay; Mzoughi, Mondher; Salum, Pelin; Zemzemoğlu, Tuba Eda Arpa; Erbay, Zafer

    Microwave-assisted vacuum drying (MVD) is an emerging technology suitable for producing healthy snack foods, such as cheese snacks. This study aimed to produce a low-fat, low-salt, crunchy cheese snack using MVD. Low-fat, low-salt cheese slices were dried under seven different combinations of microwave power (5%–15%), vacuum level (220–300 Torr), and drying time (6.5–11 min), selected through preliminary trials. The resulting snacks were characterized by their physical properties and volatile compound profile. The results revealed significant differences in moisture content, water activity, bulk density, and volumetric/surface/cross-sectional expansion among the samples. Samples produced under high vacuum and long process time conditions exhibited the most favorable overall characteristics, including the lowest moisture, water activity, and density, alongside the highest volume expansion. These samples also showed a darker color and a superior crispy texture (higher fracturability with lower hardness, springiness, and chewiness). Twelve volatile compounds, with a profile limited by the low-fat content of the cheese, were detected. The TOPSIS analysis identified the sample produced under high vacuum conditions (dried at 10% power, 220 Torr, 10 min) as optimal. Practical Applications: This study provides a roadmap for producing crunchy, low-fat, and low-salt cheese snacks using microwave vacuum drying. For food manufacturers, the identified optimal conditions offer a process guideline to develop a healthier snack alternative with an appealing texture and color. The systematic TOPSIS-based evaluation method can be adopted for quality control and product development decisions. For consumers, the resulting product aligns with growing demand for nutritious, reduced-sodium convenience foods.

    • SDG 2 · Açlığa Son
    İncele
  • MakaleYalnız künye2026
    Exploring Different Types of Career Anxiety Among Young Adults: A Latent Profile Analysis

    Ciminli, Alaattin; Aydin, Burak

    This study aimed to identify distinct latent profiles of career anxiety among young adults and to examine the predictors of membership in these profiles by relating them to various factors, including academic unit and year of study. The data were collected from a sample of 509 young adults enrolled at universities in Türkiye, comprising 409 females (80.4%) and 100 males (19.6%). The instruments used for data collection included a personal information form, Career Anxiety Scale, Hope Scale, Perceived Social Support Scale, Perfectionism Scale, and the Coping Self-Efficacy Scale. Latent profile analysis (LPA) was employed to identify latent profiles, while multinomial logistic regression (R3STEP) analysis was conducted to examine the relationships between latent profile membership and sociodemographic variables. The results of the LPA revealed three distinct latent profiles: high anxiety and vulnerable (Profile 1), low anxiety and high psychosocial strength (Profile 2), and moderate group (Profile 3). The findings indicated that when Profile 1 was used as the reference group, academic unit type and class level did not significantly predict membership in Profile 2. However, vocational school status significantly predicted membership in Profile 3. When Profile 2 was used as the reference group, it was observed that both vocational school students and fourth-year students were significantly less likely to be members of Profile 3.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    • SDG 8 · İnsana Yakışır İş ve Ekonomik Büyüme
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  • MakaleYalnız künye2026
    Determination of the Effects of Virtual Reality-Based Videos on Symptoms, Vital Signs and Comfort in Hemodialysis Patients

    Coşar, Dilan Aktepe; Bingöl, Nuray

    Introduction: This pioneering study aimed to examine the effects of virtual reality (VR)-based videos on symptoms, vital signs, and comfort levels in hemodialysis patients, offering an innovative approach to improving their quality of life. Methods: This randomized controlled pretest-posttest study included 54 hemodialysis patients treated at “X” Hospital between June 2024 and May 2025. Twenty-five patients were assigned to the intervention group, 25 to the control group, and 4 to a pilot group. Data were collected at baseline and after 8 weeks. Statistical analyses included t-tests, repeated measures ANOVA, Mann–Whitney U, and Friedman tests. Results: In the intervention group, Dialysis Symptom Index (DSI) scores decreased significantly (p < 0.05), and comfort levels increased significantly (p < 0.05) across all subscales of the Hemodialysis Comfort Scale Version II. Vital signs remained within normal ranges before and after the intervention. Conclusion: This study revealed that the use of virtual reality headsets significantly influenced dialysis symptom index scores and comfort levels. The intervention effectively reduced dialysis symptoms and significantly increased patient comfort. No significant differences were observed in vital signs.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
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  • MakaleAçık Erişim2026
    Land Subsidence Susceptibility Mapping in Semi-Arid Regions Using PS-InSAR and Tree-Based Ensemble Machine Learning: A Case Study From Çumra, Türkiye

    Bilgilioğlu, Burhan Baha

    Land subsidence is an increasing environmental hazard in semi-arid agricultural basins where intensive groundwater abstraction, compressible geological units, and expanding land-use pressures interact. This study presents a PS-InSAR and machine-learning-based framework for land subsidence susceptibility mapping in the Çumra District of the Konya Closed Basin, Türkiye. A time-series PS-InSAR analysis was conducted using 172 Sentinel-1A ascending images acquired between 2018 and 2023, and 11,718 high-confidence subsidence points were extracted as the inventory dataset. Fourteen conditioning factors representing topographic, hydrogeological, lithological, environmental, and anthropogenic controls were integrated with eight tree-based ensemble models optimized using Optuna. Random Forest achieved the highest overall performance, with an accuracy of 0.9745, precision of 0.9562, recall of 0.9945, F1 score of 0.9750, and Cohen's Kappa of 0.9490, followed by Extremely Randomized Trees and XGBoost. Class-specific validation also confirmed the reliability of Random Forest in delineating the Very High Susceptibility class. Variable importance analysis identified land use, proximity to settlements, well density, and groundwater level change as the dominant predictors, emphasizing the role of groundwater-related anthropogenic pressure in subsidence development. The resulting susceptibility maps provide a spatial decision-support basis for groundwater management, land use planning, and subsidence risk mitigation.

    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    • SDG 13 · İklim Eylemi
    • SDG 15 · Karasal Yaşam
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  • MakaleYalnız künye2026
    A Comprehensive Deep-Learning Framework Integrating Lesion Segmentation and Stage Classification for Enhanced Diabetic Retinopathy Diagnosis

    İncir, Ramazan; Bozkurt, Ferhat

    Diabetic retinopathy (DR), one of the most prevalent microvascular complications of diabetes, stands as a leading cause of vision loss globally. Due to its asymptomatic nature in early stages, delayed diagnosis and staging may result in irreversible visual impairment. Therefore, accurate and simultaneous lesion segmentation and stage classification of DR are of critical clinical importance. In this study, a two-stage, end-to-end, holistic framework is proposed for automated DR diagnosis. In the first stage, an Improved U-Net architecture enhanced with residual blocks and additional convolutional layers is employed to segment small and low-contrast lesions such as microaneurysms, hemorrhages, and hard/soft exudates with high precision. Model hyperparameters are optimized using the harmony search algorithm to enhance training efficiency. In the second stage, lesion-based weight maps obtained from the segmentation step are applied to fundus images from the APTOS dataset, generating enriched inputs for classification. A vision transformer (ViT)-based model, augmented with a Convolutional Block Attention Module (CBAM), is utilized to improve feature extraction. In addition, features derived from ViT are further refined using a graph convolutional network (GCN) and traditional machine-learning classifiers. The proposed approach achieves high performance in multi-class DR stage classification. Compared to existing studies, the framework demonstrates notable improvements in both segmentation and classification accuracy, offering a robust and generalizable solution for DR diagnosis.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
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  • MakaleYalnız künye2026
    LC–MS/MS Phenolic Profiling and Antioxidant, Antimicrobial, and Antidiabetic Activities of Caucasian Propolis

    Gültekin, Deniz Canbolat; Turan, İbrahim; Akmeşe, Osman; Gültekin, Ergün; Demir, Selim; Aliyazicioglu, Yüksel

    Propolis is a natural bee product rich in phenolic and flavonoid compounds and is well known for its remarkable biological properties. In this study, the phenolic compositions of propolis samples collected from various localities in the Caucasus region of Türkiye were characterized using LC–MS/MS, and their antioxidant, antidiabetic, and antibacterial activities were also evaluated. LC–MS/MS analyses identified caffeic acid, ferulic acid, and p-coumaric acid as the major phenolic acid compounds, while pinocembrin, chrysin, and galangin were determined as the major flavonoid constituents. Overall, these findings indicate that the antioxidant capacity of propolis samples obtained from different regions may be particularly associated with these key phenolic and flavonoid compounds. Consistent with this composition, total phenolic and flavonoid contents ranged from 34.72 to 120.54 mg GAE/g and 6.88 to 47.19 mg QE/g, respectively. The extracts exhibited a relatively high antioxidant capacity, with FRAP values between 60.47 and 311.87 mg TE/g and DPPH IC50 values ranging from 215.80 to 37.96 µg/mL. Regarding antidiabetic activity, the IC50 values for α-amylase and α-glucosidase inhibition were determined as 5.86–3.47 and 12.22–5.02 mg/mL, respectively, indicating a pronounced antidiabetic potential. Antimicrobial analyses revealed activity against E. faecalis, B. cereus, E. coli, K. pneumoniae, and C. albicans. Overall, this study provides a comprehensive LC–MS/MS-based phenolic profile of Caucasian propolis and demonstrates its antioxidant properties together with its antidiabetic potential.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
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  • MakaleAçık Erişim2026
    Post-Seismic Variation in Petrophysical Parameters and Heat Storage at the Tuzla Geothermal Field, Biga Peninsula (NW Anatolia) From Resistivity-Depth Model Using Differential Evolution Algorithm

    Büyük, Ersin; Uzel, Bora; Sözbilir, Hasan; Baba, Alper

    Electrical resistivity has been shown to offer significant insights into post-seismic changes in geothermal reservoirs; however, its interpretation is complicated by the fact that it is controlled not only by temperature, but also by porosity and clay content. In this study, we used a post-seismic electrical resistivity-depth model from magnetotelluric data to estimate the temperature changes following a seismic swarm in the vicinity of the Tuzla Geothermal Field in the Biga Peninsula of northwestern Anatolia. In the absence of pre-seismic resistivity data for the field, we attribute the characteristic part of the post-seismic model to the seismic swarm. Temperature changes were then evaluated using pre- and post-seismic wellhead temperature observations together with the post-seismic resistivity-depth model. In order to address the relationships between resistivity and petrophysical parameters, the present study combined the established equations for temperature, porosity and clay-related effects. The estimation of petrophysical parameters from combined equations was then conducted using the differential evolution algorithm (DEA), a method that has gained popularity due to its effectiveness in solving non-linear optimization problems. The main contribution of this study lies in the integrated use of a unified petrophysical framework and the DEA to jointly estimate post-seismic changes in temperature, porosity and clay content from the resistivity model. Furthermore, an estimation was made of the reduction in stored heat within the defined reservoir zone. The results indicate that the observed increase in resistivity is primarily associated with a decrease in reservoir temperature, which is consistent with the observed decrease in wellhead temperatures. In addition, changes in clay content and porosity contribute significantly to the resistivity response. The findings demonstrate the efficacy of models of resistivity-depth, obtained following seismic activities, in facilitating the inference of changes in petrophysical parameters and thermal state in geothermal systems.

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  • MakaleAçık Erişim2026
    Nurses’ Workplace Discrimination Experiences and Their Reflections on Career Development: A Qualitative Study

    Koroglu Kaba, Nagihan; Apaydin, Emine; Kulakaç, Nurşen

    Aim: This study was conducted to examine how nurses experience discriminatory behaviors in the workplace and how these experiences are reflected in their career development. Background: Although discrimination constitutes a significant challenge in nurses’ professional lives, qualitative research examining how these experiences influence their career development processes remains limited. Methods: This phenomenological study was conducted with nurses working in a public hospital in Turkey. Semi-structured individual interviews were conducted with 21 nurses during the study. Participants were selected from various clinical settings through purposive sampling. Data were analyzed using Colaizzi's seven-step content analysis method. Ethics committee approval was obtained for this study. The Consolidated Criteria for Reporting Qualitative Research checklist guided the study reporting. Results: Five main themes with seven subthemes emerged: (1) Discrimination Experiences (types of discrimination, sources of discrimination, emotions/feelings), (2) Reporting Behavior (decision and consequences of reporting, reasons for not reporting), (3) Impact of Discrimination on Career Development (supportive effect, hindering effect), (4) Coping Strategies, and (5) Suggestions for Preventing Discrimination. Discussion: These themes highlight that discrimination is a multidimensional phenomenon and that holistic approaches must be developed at emotional, structural, professional, and institutional levels to cope with it. Conclusion: For some nurses, discrimination acts as a transformative process that supports career development, while for others, it represents a significant barrier to professional advancement. Implications for Nursing/Nursing Policy: The findings highlight the need to strengthen reporting mechanisms, establish a supportive work culture, and implement inclusive institutional policies that promote career development.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    • SDG 8 · İnsana Yakışır İş ve Ekonomik Büyüme
    • SDG 10 · Eşitsizliklerin Azaltılması
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  • MakaleAçık Erişim2026
    Protecting the Privacy of Patients With Impaired Consciousness in Intensive Care: A Qualitative Study

    Tuncer, Metin; Özalp, Cemal; Keskin, Azra

    Background: Maintaining privacy in intensive care units (ICUs) is challenging because of high workload, invasive procedures, continuous monitoring and shared care environments. Patients with impaired consciousness may be particularly vulnerable because their ability to express privacy preferences, assert personal boundaries and advocate for themselves is limited. Aim: To explore intensive care nurses' experiences of protecting privacy when caring for patients with impaired consciousness. Study Design: A descriptive qualitative study was conducted with 20 intensive care nurses in Türkiye between March and April 2026. Data were collected through semi-structured online interviews and analysed using inductive thematic analysis. The study was reported in accordance with the Consolidated Criteria for Reporting Qualitative Research guidelines. Findings: Four themes were identified: the marginalisation of privacy under clinical priorities; structural and process-related constraints on privacy in intensive care; loss of subjectivity and the mechanisation of care in patients with impaired consciousness; and ethical and psychosocial implications of privacy violations. Conclusions: Privacy in intensive care is shaped not only by individual ethical awareness but also by workload, environmental conditions, care routines and communication practices. Patients with impaired consciousness have the same rights to privacy and dignity as other patients; however, their reduced ability to express preferences, assert personal boundaries and advocate for themselves may make privacy violations less visible and increase their dependence on nurses for protection. Relevance to Clinical Practice: Protecting the privacy of patients with impaired consciousness in ICUs requires structured care routines, standardised bedside communication, minimisation of unnecessary exposure during procedures and targeted ethical awareness training to support dignity in everyday practice.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
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  • MakaleAçık Erişim2026
    Turkish Adaptation, Psychometric Validity and Measurement Invariance of the Reasons for Implicit Rationing of the Nursing Care Scale

    Özalp, Cemal; Gerçek, Abdullah; Tuncer, Metin

    Aim: This study aimed to adapt the Reasons for Implicit Rationing of Nursing Care Scale into Turkish and evaluate its validity, reliability and measurement invariance among nurses in Türkiye. Background: Implicit rationing of nursing care may compromise care quality and patient safety and is influenced by organizational, resource-related and communication factors. A culturally valid instrument is needed to identify the factors contributing to implicit rationing of nursing care within the Turkish healthcare context. Design: A methodological, cross-sectional psychometric validation study. Method: Data were collected between July and December 2025 from nurses working in a public hospital in Türkiye. The source population comprised 900 nurses and 411 nurses were included in the final sample using convenience sampling. Data were collected using the Personal Information Form and the Reasons for Implicit Rationing of Nursing Care Scale. Construct validity was examined using exploratory and confirmatory factor analyses on randomly divided samples. Convergent and discriminant validity and gender-based measurement invariance were assessed. Reliability was evaluated using Cronbach's alpha, McDonald's omega and the intraclass correlation coefficient. Results: The Kaiser–Meyer–Olkin value was 0.936, indicating that the data were suitable for factor analysis. Exploratory factor analysis revealed a two-factor structure consistent with the original scale, explaining 74.30% of the total variance. Confirmatory factor analysis demonstrated acceptable model fit. Convergent validity was supported, whereas the heterotrait–monotrait ratio value indicated borderline discriminant validity. Measurement invariance across genders was largely supported at the configural, metric and scalar levels. The scale demonstrated high internal consistency and temporal stability, with a Cronbach's alpha value of 0.941, a McDonald's omega value of 0.932 and an intraclass correlation coefficient value of 0.873. Conclusion: The Turkish version of the Reasons for Implicit Rationing of Nursing Care Scale is a valid, reliable and gender-invariant instrument. It can be confidently used in Turkish clinical settings to assess factors contributing to implicit rationing of nursing care.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    İncele
  • MakaleYalnız künye2026
    Analysis of microstructural properties and durability characteristics of geopolymer mortars with mining waste

    Aksüt, Yavuz Selim; Kaya, Yusuf; Sünnetçi, Kadir

    The growing environmental concerns over resource depletion and carbon emissions from cement production have accelerated the search for sustainable alternatives to conventional concrete. In this context, geopolymers have emerged as promising binders, particularly through the utilization of aluminosilicate-rich industrial wastes to reduce environmental impact and support waste recycling. This study examines the mechanical and durability properties of geopolymer mortars produced by partially replacing ground granulated blast furnace slag (GGBFS) with mining waste (MW) at ratios of 0%, 10%, 20%, and 30%. The mixtures were activated using 10 M sodium hydroxide and sodium silicate under standard water curing conditions. Mechanical strength, ultrasonic pulse velocity (UPV), freeze–thaw resistance, and sulfate durability were evaluated. The optimum performance was obtained with 20% MW, which achieved a 30.4% increase in flexural strength and 18% in compressive strength at 7 days. This mixture also showed the lowest mass (10.69%) and strength loss (18.36%) after 50 freeze–thaw cycles. Scanning electron microscopy analysis confirmed enhanced gel formation and microstructural densification. The findings demonstrate that controlled use of MW not only improves durability but also promotes sustainable binder development in geopolymer technology.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 12 · Sorumlu Üretim ve Tüketim
    • SDG 13 · İklim Eylemi
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