Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(117)
- Kaya, Yunus(51)
- Şahin, Engin(48)
- İspirli, Hümeyra(47)
- Özen, Soner(46)
- Şenay, Volkan(45)
- Pat, Suat(44)
- Can, Zehra(39)
- Bayraktar, Bülent(37)
- Bayram, Sinan(37)
- Korkmaz, Şadan(36)
- Cuce, Erdem(35)
- Ecem Bayram, Nesrin(33)
- Kutlu, Naciye(33)
- Yilmaz, Mustafa Tahsin(32)
- Artar, Musa(31)
- Ertugrul, Mehmet(30)
- Öner, Erdal(30)
- Ayata, Ümit(29)
- Hasar, Ugur Cem(29)
- Esmer, Yusuf(28)
- Mercan, Emin(27)
- Cuce, Pinar Mert(26)
- Özdemir, Akın(25)
- Çolak, Murat(24)
- Bayram, Ozkan(23)
- Kamiloğlu, Aybike(23)
- Sert, Durmuş(22)
- Ayazoglu, Rabil(21)
- Abdioglu, Murat(20)
- Bayram, Nesrin Ecem(20)
- Kadakal, Mahir(20)
- Kara, Yakup(20)
- Kizil, Hamit Emre(20)
- Tozlu, Alperen(20)
- Birinci, Ahmet(19)
- Gerçek, Yusuf Can(19)
- Battal, Fetullah(18)
- Dirican, Ebubekir(18)
- Ergün, Mustafa(18)
Yayınlar
- MakaleAçık Erişim2026Scopus SJRQ1Big five personality, anxiety sensitivity, and Turkish L2 speaking anxiety in international students: a mediation model
Yayla, Ibrahim Erdoğan; Dombak, Kübra; Maden, Sedat; Arpaci, Ibrahim; Baloglu, Mustafa
Introduction – Second language (L2) speaking anxiety is a significant affective variable that can limit the communication processes and academic experiences of foreign language learners. Although interest in the relationship between personality traits and speaking anxiety has increased in recent years, the psychological processes through which this relationship manifests have not been sufficiently investigated. Method – The mediating role of anxiety sensitivity in the relationship between the Five-Factor Model of personality traits and L2 speaking anxiety was examined. The research is a cross-sectional, quantitative study conducted with international university students learning Turkish as a second language (N = 286; 76.6% male). The data were analyzed using bootstrap-based mediation analyses. Result – We found significant negative correlations between conscientiousness, agreeableness, extroversion, and openness to experience and L2 speaking anxiety, and a significant positive correlation with neuroticism. Mediation analyses showed that anxiety sensitivity had significant indirect effects in the relationships between all five personality dimensions and L2 speaking anxiety. Discussion – The findings suggest that both personality traits and anxiety sensitivity should be considered when interpreting Turkish L2 speaking anxiety.
- MakaleYalnız künye2026Scopus SJRQ4Global Economic Policy Uncertainty and Bitcoin: A Transient Nexus
Yıldız, Ümit
Uncertainty plays a significant role in shaping investment decisions, both directly and indirectly. In an uncertain economic environment, investors’ motivations for decision-making may vary. While some investors tend to seek safe-haven assets, others may engage in speculative behavior. Therefore, uncertainty can influence financial instruments through various mechanisms. One of these instruments is Bitcoin, which is often regarded as the “gold” of cryptocurrencies. Compared to traditional financial investment instruments, Bitcoin exhibits higher volatility and is among the primary assets that may be affected by uncertainty. However, an important question is whether this effect is temporary or per-manent. By adopting a frequency-domain causality approach, this study seeks to investigate the causal linkages between Global Economic Policy Uncertainty (GEPU) and Bitcoin price movements. In this context, the causal nexus between GEPU and BTC prices is examined for the entire period and for different frequencies. Although the study's findings show no causal nexus between the variables over the entire period, the analyses for the short, medi-um, and long run indicate a causal relationship from GEPU to BTC in the medium run. Accordingly, GEPU can be considered one of the factors affecting BTC price; however, its impact does not appear to be persistent.
- MakaleAçık Erişim2026Scopus SJRQ1Chemical composition acaricidal activity and honeybee safety of essential oils from Origanum acutidens, Satureja hortensis, and Juniperus communis against Varroa destructor
Erdoğan, Yaşar
Varroa destructor is a destructive ectoparasite of honeybees (Apis mellifera). This study investigates the chemical composition and bioactivity of essential oils obtained from three medicinal plants (Origanum acutidens, Satureja hortensis, and Juniperus communis). The chemical components of the essential oils were determined by Gas Chromatography-Mass Spectrometry (GC-MS). These oils were evaluated for their acaricidal, repellent, and insecticidal activities against V. destructor, as well as their lethal effects against honeybee larvae. The results revealed that the essential oils of O. acutidens (LC50: 2.18, LC90: 6.07 µL/L) and S. hortensis (LC50: 1.79, LC90: 5.77 µL/L) exhibited strong acaricidal effects, while those of J. communis (LC50: 3.75, LC90: 4.16 µL/L) exhibited moderate activity. S. hortensis showed the highest repellent effect against V. destructor (ED50: 0.44, ED90: 1.25 µL/L), followed by O. acutidens (ED50: 0.58, ED90: 4.22 µL/L) and J. communis (ED50: 0.87, ED90: 46.3 µL/L). Furthermore, the larval mortality rates remained below 5% in all treatments, indicating negligible toxicity to honeybee larvae. Overall, this study highlights for the first time the comparative acaricidal and repellent efficacy of these three essential oils under identical experimental conditions, emphasising their potential as natural and environmentally friendly alternatives for controlling V. destructor. Further research is needed to optimise application methods and evaluate long-term effects under field conditions.
AtıfScopus1WoS2OpenAlex2
İncele - Derleme MakaleAçık Erişim2026Scopus SJRQ1Relationships between problematic social media use and social comparison: a meta-analysis
Demir, Mustafa; Yayla, İbrahim Erdoğan; Kaya, Metin; Koçak, Lokman; Arpaci, Ibrahim; Baloglu, Mustafa
We examined the relationship between problematic social media use (PSMU) and social comparison via a meta-analysis. We conducted a systematic literature review and meta-analysis. The study includes quantitative data from 20 independent studies published between January 2019 and October 2025 that examined the relationship between PSMU and social comparison. The studies encompassed adolescents, university students, and the general adult population from both individualistic and collectivist cultural contexts. Effect sizes were calculated using Fisher’s z-transformation under a random-effects model. The results indicated a modest positive relationship between PSMU and social comparison, with an effect size (ES) of 0.24 (95% CI [0.13, 0.36]). Following the Trim-and-Fill adjustment, the effect size decreased slightly, but the overall pattern was preserved. Additional meta-analyses based on standardized regression coefficients showed that, when control variables were included, the association weakened but remained detectable (ES = 0.169, 95% CI [0.029, 0.309]). Effect sizes in unpublished studies were close to zero; however, this finding should be interpreted with caution, as it is based on a limited number of unpublished studies. A high degree of heterogeneity was observed across the analyses. Moderation and meta-regression analyses indicated that the relationship may vary depending on the type of social comparison scale, age, gender composition, and countries’ Global Innovation Index scores. Studies using theory-based measures of social comparison reported higher effect sizes. Higher effect estimates were observed in samples comprising older participants, in groups with a greater proportion of men, and in countries with lower levels of national innovation. In contrast, effect estimates in adolescent samples were relatively small and, in some subgroup analyses, remained trivial despite reaching statistical significance. In conclusion, social comparison shows a limited, context-sensitive relationship in magnitude rather than a strong or universal one with PSMU. However, it is unclear whether the observed relationship reflects a genuine connection between the independent constructs or partial conceptual overlap between the measurement instruments. The findings suggest that, although some sub-group effects may be statistically significant, their practical importance may remain limited. Therefore, the relationship between PSMU and social comparison should be evaluated within a multi-layered theoretical framework that accounts for measurement approaches, socio-technical contexts, and potential conceptual overlaps between constructs.
AtıfScopus1WoS1OpenAlex2
İncele - MakaleAçık Erişim2026Scopus SJRQ3Investigation of e-sports attitudes among prospective physical education and sports teachers
Vural, Engin; Toçoğlu, Sinem; Kiratli, Tuncay; Yildirim, Yavuz; Saritemur, Büşra
This study aimed to examine the e-sports attitudes of prospective physical education and sports teachers. A total of 304 participants, including 154 (50.7%) females and 150 (49.3%) males, with a mean age of X ̄ = 21.17±2.10, studying in the Department of Physical Education and Sports Teaching at three different state universities, were included in the study. A Personal Information Form developed by the researchers and the "E-Sports Attitude Scale" were used to assess e-sports attitudes. According to the study results, a statistically significant difference was found in mean e-sports attitude scores according to the gender variable (p<0.05). It was determined that there were no statistically significant differences in mean e-sports attitude scores according to class level (p>0.05). However, statistically significant differences were observed in mean e-sports attitude scores based on the duration of gameplay (p<0.05). In conclusion, it was found that males exhibited more positive attitudes toward e-sports, grade level did not significantly affect e-sports attitudes, and participants' attitudes toward e-sports became more positive as gameplay duration increased. Future studies may consider exploring other demographic factors influencing e-sports attitudes, which are expected to contribute further to the literature.
- MakaleYayıncıda açık erişim2026Scopus SJRQ3Effects of phenolic-standardized Crataegus orientalis flower extract on honey bee colony development and seasonal honey yield; [Efectos del extracto floral de Crataegus orientalis estandarizado en compuestos fenólicos sobre el desarrollo de colonias de abejas melíferas y el rendimiento estacional de miel]
Erdoğan, Yaşar; Erdoğan, Ümmügülsüm
Aim of study: The aim of this study was to evaluate the effects of a phenolic-standardized flower extract from Crataegus orientalis Pall. on honey bee colony development and end-of-season honey yield under field conditions, and to assess its lasting colony-level effects. Area of study: The study was conducted during the 2025 beekeeping season at the apiary of Bayburt University Beekeeping Application and Research Center, located in northeastern Türkiye. Material and methods: Twenty-four initially balanced honey bee (Apis mellifera L.) colonies were randomly assigned to four groups (n = 6): a control group receiving 1:1 sucrose:water syrup and three treatment groups receiving 50, 100, or 200 mg GAE L⁻¹ of phenolic-standardized Crataegus orientalis flower extract. Colonies were fed daily for 21 days in early spring and monitored at seven time points (T0–T6) from mid-May to late August. Colony development was assessed using brood area (cm²) and number of frames with bees, while hive-front dead bees were recorded as a safety indicator. Net honey yield was determined at the end of the season. Main results: Daily syrup consumption did not differ among groups (P > 0.05), whereas daily phenolic intake increased in a dose-dependent manner (P < 0.05). Brood area increased significantly with dose and was generally higher in the high-dose group than in the control group throughout the season (P < 0.001). No significant differences were observed among groups for seasonal averages of frames with bees or mortality index; however, a significant treatment × time interaction was detected for frames with bees. Net honey yield was significantly higher in the high-dose group compared to the control group (P < 0.01). Research highlights: Short-term early spring supplementation with phenolic-standardized Crataegus orientalis flower extract supported brood development without increasing adult bee mortality. This early developmental advantage resulted in a measurable improvement in end-of-season honey yield under field conditions.
- MakaleAçık Erişim2026Scopus SJRQ1Nurses’ 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.
AtıfScopus1OpenAlex1İncele - MakaleAçık Erişim2026Scopus SJRQ2Nutrient composition of some edible wild plants with high nutritional value in Eastern Türkiye
Bakacak, Mustafa; Gul, Volkan
The demand for edible wild plants for their health and high nutritional content has increased dramatically worldwide. Although some wild plant species are eaten as vegetables, information on their nutritional content is limited. This study provides interesting, useful data (moisture, dry matter, ash, organic matter, protein, and mineral content) on the nutritional value of ten wild plant species traditionally consumed in the eastern Anatolia region of Türkiye. These species are Arum rupicola var. virescens, Allium vineale, Rumex crispus, Satureja hortensis, Scorzonera mollis subsp. szowitzii, Eremurus spectabilis, Urtica dioica, Gundelia glabra, Rheum ribes, and Ferula orientalis, According to the results obtained; dry matter ratio varied between 6.03–10.77%, organic matter ratio varied between 80.63–93.65%, protein ratio varied between 9.94–35.71%, P content varied between 112.38–806.54 mg/100 g, K content varied between 1597.46–7980.06 mg/100 g, Mg content varied between 214.64–704.84 mg/100 g, Ca content varied between 142.6.2–1157.53 mg/100 g and Fe content varied between 14.20–460.32 mg/100 g. Urtica dioica gave the best results in terms of protein, P, Mg, Ca, Na, and Cu, while Scorzonera mollis subsp. szowitzii gave the best results in terms of Mn and Cu. These new findings suggest that the obtained plants can be considered a valuable source of nutrients in human nutrition and will allow their inclusion in food nutrient databases.
- MakaleAçık Erişim2026Scopus SJRQ3Bibliometric analysis on mental health and psychological well-being
Battal, Fetullah; Öz, Halil Hakdan; Yılmaz, Şeymanur
Objectives: This study aimed to analyze publication and citation trends, productive journals, influential authors, university productivity, and conceptual structures in the field of mental health and psychological well-being using biblio-metric analysis methods. Methods: This bibliometric study was conducted using 522 research articles from the Web of Science database. The analysis evaluated annual publication counts, citation counts, author and institutional performance, regional distri-bution, co-citation networks, thematic mapping, and citation networks. Core journals in the field were also identified using Bradford’s Law. Results: The findings indicate that while the number of annual publications has increased over time, citation counts have fluctuated. The most productive journal was identified as Personality and Individual Differences. The most fre-quently used concepts in the field were mental health, depression, and stress. Among 1,849 authors, Creed PA stood out with 5 publications, and Crocker J. with 826 citations. In terms of institutions, publication output was concentrated at universities such as the University of Michigan, Griffith University, and Syracuse University. The United States was central in terms of regional distribution. Thematic and co-occurrence networks showed that the concept of “mental health” was central. Citation networks indicated a limited number of key studies in the field. Bradford’s Law indicated that the literature was concentrated in certain areas. Conclusion: The field of mental health and psychological well-being has developed around certain authors, journals, and institutions. The number of publications has increased, but citation visibility has remained limited. Fundamental concepts related to the field continue to shape its structure.
- MakaleAçık Erişim2026Scopus SJRQ2Physical, chemical and thermal characterization of bacterial nanocellulose produced using sugar beet molasses by Komagataeibacter sp. SB2569
Kara, Adem; Bayram, Sinan
Bacterial nanocellulose (BNC) is a biopolymer synthesized by bacteria utilizing various carbon sources. The biocompatible and biodegradable nature of BNC offers considerable advantages for its application in fields such as medicine, biomedical engineering, cosmetics, food, nanocomposites, and organoelectronics. Nevertheless, the high production costs necessitate the development of more cost-effective and efficient BNC production methodologies. This study aimed to produce BNC utilizing cost-effective sugar beet molasses. To achieve this, bacteria isolated from various vinegar samples were assessed, revealing that the BNC production potential of these isolates ranged from 2.09 to 3.21 g L⁻1. The 16S rDNA gene of the strain with the highest BNC yield was amplified and sequenced, and it was subsequently deposited in the GenBank database as Komagataeibacter sp. SB2569, with the accession number PV231799.1. XRD analysis revealed characteristic diffraction peaks at 14.8°, 16.5°, 22.6°, and 34.5°, confirming the cellulose 1β crystalline structure and high crystallinity of the synthesized BNC. FTIR analysis exhibited characteristic absorption bandsthat, confirming the presence of β-1,4-glycosidic linkages and the cellulose I structure of BNC. TGA analysis showed an initial weight loss of ~ 5% between 0–100 °C, a major degradation of ~ 75% occurring at 220–350 °C with a maximum decomposition rate at 343 °C, and a residual mass of approximately 10–20% remaining above 600 °C. The findings indicate that the Komagataeibacter sp. SB2569 strain holds significant potential for BNC production using low-cost carbon sources.
AtıfScopus1WoS1OpenAlex2İncele - MakaleAçık Erişim2026Scopus SJRQ3Association of Plasma miRNA-7-5p and miRNA-214-5p With Rheumatoid Arthritis Associated Interstitial Lung Disease
Sahinoğlu, Irem; Karakas, Umit; Uslu, Sadettin; Kizilirmak, Deniz; Acar, Emre Ali; Tasgöz, Filiz Cemre; Kacar, Mevlüt; Sülükcü, Seref; Sengül, Merve Türkegün; Erdal, Mehmet Emin
Objective: Rheumatoid arthritis–associated interstitial lung disease (RA-ILD) is a major extra-articular complication contributing to increased morbidity and mortality. Circulating microRNAs (miRNAs) have emerged as potential non-invasive biomarkers in autoimmune diseases. This study aimed to evaluate whether plasma miRNA-7-5p and miRNA-214-5p are associated with the presence of RA-ILD and with radiological and functional indicators of pulmonary involvement. Methods: In this cross-sectional study, 58 RA patients (29 RA-ILD, 29 without ILD) and 30 matched healthy controls were included. RA-ILD was diagnosed by multidisciplinary assessment (HRCT and pulmonary function tests). Plasma miRNA levels were measured by qRT-PCR and analyzed using the 2^−ΔΔCT method. Diagnostic performance was evaluated by ROC analysis. Results: Plasma miRNA-7-5p and miRNA-214-5p levels were significantly higher in RA patients compared with healthy controls (p < 0.05 for both). Among RA patients, both miRNAs were significantly lower in those with ILD (p < 0.05). miRNA-7-5p demonstrated promising discriminatory performance for identifying RA-ILD (AUC = 0.87, 95% CI: 0.760–0.947; p < 0.001), whereas miRNA-214-5p showed modest accuracy (AUC = 0.676, 95% CI: 0.539–0.794; p = 0.01). In multivariable analysis, ILD presence was independently associated with decreased levels of both miRNAs. Neither miRNA correlated significantly with DAS28-CRP, disease duration, nor with radiological or functional severity parameters. Conclusion: Circulating miRNA-7-5p and miRNA-214-5p are associated with the presence of RA-ILD but do not reflect disease severity in this cohort. Larger prospective studies are required to validate their potential role as adjunctive biomarkers for RA-ILD detection and risk stratification.
- MakaleAçık Erişim2026Scopus SJRQ1Structural condition assessment of the Bamsı Beyrek observation terrace in Bayburt, Türkiye, on autonomous updated FEMs
Ergün, Mustafa; Tayfur, Bilal; Güneş, Erdi
This study involves detailed numerical and experimental investigations to assess the current structural condition of the Bamsı Beyrek steel observation terrace in Bayburt, Türkiye. The numerical dynamic characteristics of the structure were obtained by free vibration analysis conducted on the preliminary finite element model, while the experimental ones were determined through ambient vibration testing. The ultimate finite element models representing the actual state of the structure were developed through the model updating process based on the principle of minimizing the differences between numerical and experimental dynamic characteristics via the Teaching-Learning Based Optimization Algorithm. Load types and their characteristic values, potentially impacting the observation terrace during its service life, were identified according to national and international code standards. The internal forces obtained from the analysis conducted on the updated model under the influence of these loads were combined using various load combinations. The structure was then statically and dynamically checked based on the most critical responses calculated from these combinations. Structural responses are evaluated based on distributions in PMM ratios on the structure, PMM ratios of all elements according to the combination that causes the most adverse values, and maximum displacements. Consequently, considering all the findings obtained from the assessments conducted on the finite element model, which reflects the current state of the observation terrace under various loads, it has been concluded that the structure is statically and dynamically reliable and does not require any repair or strengthening procedures.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2026Scopus SJRQ1Profile of honey, bee pollen and bee bread: comparative shotgun sequencing
Morgil, Hande; Ecem Bayram, Nesrin
The plant origin of the bee products often influences their value. Here, we investigated for the first time how the content of bee bread, a functional food with high nutritional value, differs in terms of plant and bacterial taxa in comparison with bee pollen and honey samples, using shotgun sequencing analysis. Sequencing of honey, bee pollen, and bee bread samples yielded approximately 32.74 Gbp of data. Out of a total of 268,964 abundant genes, 70,280 genes (26.13%) were assigned to a taxonomic group according to the supermajority rule. These taxonomic groups were annotated as follows: Kingdom (84.99%), phylum (75.94%), class (73.26%), order (67.21%), and family (65.11%). It was determined that honey, bee pollen, and bee bread samples consisted of large plant families Poaceae, Fabaceae and Asteraceae. This indicates that these taxa are also favored by bees for visiting, and are therefore used as food sources. These differences vary according to the environmental flora of the apiary and may be site specific. Based on these results, DNA-based next-generation sequencing techniques can be successfully used to identify the plant sources of bee products. Thus, the botanical and geographical origin of bee product samples can be more accurately, reliably and in detail identified. Furthermore, this technique can be successfully used to monitor the regional flora and food safety.
- MakaleYayıncıda açık erişim2026Scopus SJRQ1Surface modification and tribological performance of AISI 4140 steel via shot peening and plasma nitriding: A systematic evaluation of conventional, repeated and severe plastic deformation
Erdoğan, Ömer; Kovacı, Halim
Despite its widespread industrial use, AISI 4140 steel exhibits limited resistance to wear and surface damage. This study investigates the effects of vibratory shot peening and plasma nitriding processes, applied individually and in combination, on the tribological performance of AISI 4140 steel. Shot peening was performed under conventional (CSP), re-shot peening (RSP) and severe shot peening (SSP) conditions, while plasma nitriding was carried out at temperatures of 460 °C and 535 °C. The severe plastic deformation created by shot peening increased dislocation density, significantly improving nitrogen diffusion during plasma nitriding. The SSP condition resulted in the highest surface hardness, increasing from 248 HV0.1 to 533 HV0.1, while the combined SSP and plasma nitriding treatment produced a maximum hardness of 920 HV0.1. In dry wear tests, the combined application of shot peening and plasma nitriding significantly reduced the wear rate, achieving a reduction of approximately 94% compared to the untreated sample. In saltwater environments, wear behaviour was controlled by the continuity of the nitride layer and the diffusion depth, resulting in an 82% reduction in wear rate for the SSP and plasma nitriding condition. Overall, it has been observed that applying vibratory shot peening prior to plasma nitriding significantly improves the tribological performance of AISI 4140 steel.
- MakaleAçık Erişim2026Scopus SJRQ1Relationship between food insecurity, intuitive eating, and body mass index among adults: a cross-sectional study in Türkiye
Ünal, G.; Esgin, Özge
This study examined the relationship between food insecurity, intuitive eating, and body mass index among adults. This cross-sectional study was conducted through face-to-face interviews between January and March 2025 at a public university in Türkiye, involving 1166 students and personnel (65.7 % women; age range: 19–64 years). Participants answered the Food Insecurity Experience Scale and the Intuitive Eating Scale-2, which has four subdimensions: unconditional permission to eat, eating for physical rather than emotional reasons, reliance on hunger and satiety cues, and body-food choice congruence. Self-reported body weight and height were collected to calculate body mass index. Food insecurity was experienced by 42.7 % of participants. It was associated with lower total Intuitive Eating Scale-2, reliance on hunger and satiety cues, body-food choice congruence (controlled for sex, institutional role, and age), and eating for physical rather than emotional reasons (controlled for sex and institutional role) scores. Sex was not a moderator of the association between food insecurity and intuitive eating. There were no significant interactions between Intuitive Eating Scale-2 total and subdimensions and food security status for body mass index. Overall, our study provides empirical evidence that food insecurity is a significant factor that contributes to low levels of intuitive eating in a large sample of Turkish adults. Further studies should investigate the moderating effect of sex on the association between food insecurity and intuitive eating, while also emphasizing the role of food insecurity in the relationship between intuitive eating habits and body mass index in different populations.
AtıfWoS1OpenAlex2İncele - MakaleAçık Erişim2026Scopus SJRQ1Exergy and DFT-Based Thermodynamic Analysis of a Rankine–VCR Marine Waste Heat Recovery System
Keven, Arzu; Akçay, Enes; Gümüş, Hacer
This study investigates the performance of a diesel engine exhaust gas-driven Rankine Cycle-supported vapor compression refrigeration system using quantum chemical approaches beyond conventional thermodynamic analyses. The study focuses on R448A and its components, namely R32, R125, R134a, R1234yf, and R1234ze(E), evaluated at both the system level and the molecular level. At the system level, the Rankine–VCR system was analyzed using a Fortran-based macroscopic thermodynamic model, in which the thermophysical properties of the working fluids were obtained from the NIST Chemistry WebBook. At the molecular level, Density Functional Theory (DFT) calculations were performed to determine molecular structure parameters, including entropy, heat capacity, chemical hardness, and thermal enthalpy correction. The main objective is to investigate the possible relationships between these molecular descriptors and system-level performance indicators, while considering that mass flow rate is primarily governed by cycle thermodynamic properties. The results show that molecular stability and structural order are strongly associated with system performance. Among the R448A components, R32, with the highest chemical hardness (8.19 eV) and lowest molecular entropy (58.9 cal/mol K), exhibits the most favorable exergetic behavior and achieves the highest plant exergy efficiency of 44.92%. In contrast, R1234ze(E), chemically softer (η = 4.42 Ev) and higher in entropy, exhibits the lowest performance. Additionally, R32’s lower thermal enthalpy correction is associated with higher latent heat of vaporization under the selected operating conditions, reducing the required mass flow by approximately 60–70% compared to the other components. This study demonstrates that, in refrigerant selection, not only the global warming potential (GWP) but also quantum parameters such as chemical hardness, molecular entropy, heat capacity, and thermal enthalpy correction can serve as important complementary performance indicators when interpreted together with macroscopic thermodynamic and exergetic results.
- MakaleAçık Erişim2026Scopus SJRQ1Enhanced Absorption-Dominant EMI Shielding Performance of Pyramidal Cementitious Composites Incorporating Recycled Plastics and Magnetite Minerals for 5G Applications
Cakir, Mehmet; Engin, Mustafa Alptekin; Camuzcuoglu, Murat
In this study, waste polypropylene (PP) and magnetite (Fe3O4) mineral-reinforced cement-based pyramidal composite structures were designed, manufactured, and experimentally characterized to reduce electromagnetic interference (EMI) problems in the 3.3–4.9 GHz frequency band for 5G communication systems. Unlike traditional planar concrete surfaces, the aim was to minimize surface reflections and obtain an absorption-dominant shielding mechanism by providing gradient impedance matching through the pyramidal geometry. Although the use of carbon-based nanomaterials is common in the current literature, their high cost and corrosion risks limit their large-scale applications. This study involves the evaluation of waste polypropylene disposal and self-enriching magnetite mineral together. Theoretical analyses were supported by the Lichtenecker Logarithmic Mixing Rule and the Maxwell–Garnett model, and seven different mixing scenarios (S1–S7) were measured using the free-space method with a Libre vector network analyzer. Experimental results showed that the pure concrete sample exhibited predominantly reflective behaviour, with shielding performance improving significantly as the filler ratio increased. The S4 sample, containing 15% PP and 10% magnetite, offered broadband and balanced absorption performance, while the S7 sample, containing 25% PP and 25% magnetite, provided the highest shielding effectiveness with reflection below −10 dB across the entire band and transmission loss reaching −65 dB.
- MakaleAçık Erişim2026Scopus SJRQ2Barriers to physical activity in individuals with autism spectrum disorders after the 2023 Kahramanmaraş Earthquakes in Türkiye
Yarımkaya, Erkan; Şenlik, Zeynel Abidin; Demir, Mehmet; Töman, Ufuk; Kul, Murat; Türkmen, Mutlu
The individual, environmental and systemic physical activity (PA) barriers experienced by individuals with autism spectrum disorder (ASD) in daily life may become more complex after a devastating disaster such as an earthquake. In order to effectively combat the high level of inactivity that may occur after an earthquake in individuals with ASD, PA barriers must be determined before the earthquake. However, no description is provided in the literature regarding the PA barriers experienced by individuals with ASD after the earthquake. The purpose of this phenomenological study is to examine parents’ experiences regarding PA barriers experienced by individuals with ASD after the 2023 Kahramanmaraş earthquakes in Türkiye. Fifteen parents of individuals aged 8 and 31 with ASD were interviewed. The interviews were analyzed using both inductive and deductive content analysis approach. Three overarching themes were found: (1) the effects of PA on individuals with ASD, (2) post-earthquake PA barriers, and (3) the consequences of lack of PA in individuals with ASD. The results revealed that parents were aware of the benefits of PA and directed their children with ASD to PA before the earthquake. However, after the earthquake, parents encountered PA barriers that they had to overcome, and this negatively affected the children with ASD.
AtıfScopus5WoS5OpenAlex5İncele - MakaleYalnız künye2026Scopus SJRQ2Boundedness in a parabolic-elliptic chemotaxis system with logistic source involving the exponents depending on the spatial variables and nonlinear signal productions
Ayazoglu, Rabil; Simsek, Ramazan
This paper considers the global boundedness of solutions to the parabolic-elliptic chemotaxis system with a logistic source involving exponents that depend on spatial variables and nonlinear signal production: (Formula presented.) where (Formula presented.), μ, (Formula presented.), and (Formula presented.) is a measurable function, subject to the homogeneous Neumann boundary conditions in a bounded domain (Formula presented.) with smooth boundary. We prove that if either (Formula presented.), (Formula presented.) or (Formula presented.) with (Formula presented.) or (Formula presented.) with (Formula presented.), (Formula presented.) or (Formula presented.), then the above system possesses a unique global bounded classical solution.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2026Scopus SJRQ1The Effect of Inquiry-based Science Learning Supported By Augmented Reality On Scientific Process Skills and Academic Achievement in Preschool
Arici, Faruk
Inquiry-based learning (IbL) is widely recognized as an effective pedagogical approach in early science education; however, young learners often struggle to engage with abstract concepts and sustain inquiry processes. Augmented reality (AR) has the potential to address these challenges by enhancing interaction, visualization, and engagement in learning environments. Although previous studies have demonstrated the positive effects of IbL and AR separately, empirical evidence examining the combined impact of AR-supported IbL on preschool students’ academic achievement and scientific process skills (SPS) remains limited, particularly in early childhood science education. This study aimed to investigate the effects of AR-supported IbL, IbL alone, and the current preschool science curriculum on children’s academic achievement and SPS. In addition, participants’ perspectives on learning experiences, skill development, and instructional activities were explored. A mixed-methods design was employed with three groups: AR-supported IbL, IbL-only, and a control group following the existing curriculum. Quantitative data were collected using achievement and SPS assessments, while qualitative data were collected through repeated teacher observations and in-depth interviews conducted throughout the intervention. Results indicated that AR-supported IbL led to significantly higher academic achievement and SPS than IbL alone or the current curriculum. While IbL was more effective than the curriculum-based approach, integrating AR further strengthened inquiry cycles and particularly enhanced measurement, communication, and prediction skills. Observational and interview data supported these findings by revealing increased curiosity, engagement, and active participation. The findings suggest that integrating AR within inquiry-based pedagogical frameworks can substantially improve the effectiveness of preschool science education. Implications are discussed for curriculum design, teacher professional development, and the development of developmentally appropriate AR-supported learning environments.