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Koleksiyondaki öğeler
- Derleme MakaleAçık Erişim2023Scopus SJRQ1Recent Insights into the Use of Antagonistic Yeasts for Sustainable Biomanagement of Postharvest Pathogenic and Mycotoxigenic Fungi in Fruits with Their Prevention Strategies against Mycotoxins
Oztekin, Sebahat; Dikmetas, Dilara Nur; Devecioglu, Dilara; Acar, Emine Gizem; Karbancioglu-Guler, Funda
Fungi-induced postharvest diseases are the leading causes of food loss and waste. In this context, fruit decay can be directly attributed to phytopathogenic and/or mycotoxin-producing fungi. The U.N. Sustainable Development Goals aim to end hunger by 2030 by improving food security, sustainable agriculture, and food production systems. Antagonistic yeasts are one of the methods presented to achieve these goals. Unlike physical and chemical methods, harnessing antagonistic yeasts as a biological method controls the decay caused by fungi and adsorbs and/or degrades mycotoxins sustainably. Therefore, antagonistic yeasts and their antifungal mechanisms have gained importance. Additionally, mycotoxins’ biodetoxification is carried out due to the occurrence of mycotoxin-producing fungal species in fruits. Combinations with processes and agents have been investigated to increase antagonistic yeasts’ efficiency. Therefore, this review provides a comprehensive summary of studies on preventing phytopathogenic and mycotoxigenic fungi and their mycotoxins in fruits, as well as biocontrolling and biodetoxification mechanisms.
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İncele - MakaleYalnız künye2023AN EXAMINATION OF EMOTIONAL AND CREATIVE LEVELS AMONG TERTIARY STUDENTS IN TEAM AND INDIVIDUAL SPORTS
Çingöz, Yunus Emre; Mavibaş, Muhammet
The primary objective of this research was to investigate the effect of emotional states on creativity levels tertiary students in team and individual sports. The study further aimed to discern the various emotional states and creativity levels prevalent among athletes, contingent on different variables. The participants comprised 302 athletes, 162 males and 140 females, who were all registered students in the Faculty of Sports Sciences at Bayburt University. In order to gather demographic data, the researchers constructed a “Personal Information Form”. The “Sports Emotion Scale”, developed by Urfa and Aşçı (2019), was utilized to assess the emotional states of the athletes within their respective sports. To evaluate their creativity levels in sports, the “Creativity Scale for Athletes”, constructed by Güngör et al. (2020), was utilized. Data analysis incorporated frequency analysis for determining the participants' demographic attributes, and descriptive tests for establishing the mean scores of both emotional states and creativity levels in sports. The independent t-tests were used to compare emotional and creativity levels based on gender and sport type. One-way ANOVA tests were used to compare emotional and creativity levels based on educational level and years of sports experience. Post-hoc comparisons were facilitated using Tukey tests to identify specific group differences. Lastly, multiple linear regression analysis was applied to scrutinize the impact of emotional states on creativity levels in sports. The research findings indicate that athletes participating in team sports demonstrated higher levels of enthusiasm and happiness, as determined by the sub-dimensions of the Sports Emotion Scale, when compared to athletes participating in individual sports. In addition, it was noted that an increase in feelings of unhappiness among athletes corresponded to a decrease in their levels of sports creativity. Conversely, a surge in enthusiasm was associated with heightened creativity levels within sports.
- MakaleAçık Erişim2024Scopus SJRQ3Construction of a new generalization for n-polynomial convexity with their certain inequalities
Kadakal, Mahir; İşcan, İmdat; Kadakal, Huriye
In this paper, we first construct a new generalization of n-polynomial convex function. That is, this study is a generalization of the definition of "n-polynomial convexity" pre-viously found in the literature. By making use of this construction, we derive certain inequalities for this new generalization and show that the first derivative in absolute value corresponds to a new class of n-polynomial convexity. Also, we see that the obtained results in the paper while comparing with Hölder, Hölder-İşcan and power-mean, improved-power-mean integral inequalities show that the results give a better approach than the others. Finally, we conclude our paper with applications containing some means.
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İncele - MakaleAçık Erişim2024Scopus SJRQ3Investigation of Hot Press and Cold Press Effects on Structural, Electrical and Magnetic Properties of Pyrene Added Bulk MgB2
Erdem, O.
In this paper, the effects of hot pressing and cold pressing on the superconducting properties of pyrene (C16H10) added bulk MgB2 were compared. For this aim, the polycrystalline disk-shaped MgB2 samples with addition of 4 wt % C16H10 powder were fabricated by a pellet/closed tube method at 850 °C, after hot pressing at 200 °C and cold pressing. The XRD and SEM results showed that although a-lattice parameters reduce for both C16H10 added samples, the average crystallite size increases after cold pressing because of the accumulation and inhomogeneous distribution of C in the MgB2 structure while it reduces for the C16H10 added hot pressed sample. The resistivity measurements showed that the increment of electron scattering is higher for the C16H10 added cold pressed sample than that of the C16H10 added hot pressed one which shows relatively better grain connectivity, and the Tc values of the samples are not appreciably affected by the pressing conditions. From the magnetisation measurements the in-field Jc values at 10 K and 5.5 T were obtained as 8.41 × 103 A/cm2, 1.62 × 104 A/cm2, 6.90 × 103 A/cm2 and the Hirr values while Jc = 100 A/cm2 at 20 K were obtained as 5.99 T, 6.55 T and 6.19 T for the pure sample and the C16H10 added hot and cold pressed samples, respectively. The higher Jc and Hirr values obtained for the C16H10 added hot pressed sample is because of the homogenous C substitution into MgB2 grains, as compatible with its lower Δρ value, and thus increased flux pinning ability.
- MakaleAçık Erişim2023Scopus SJRQ1Exploring the Charge Transport of a Natural Eumelanin for Sustainable Technologies
Paulin, João V.; Bayram, Sinan; Graeff, Carlos F. O.; Bufon, Carlos C. B.
Eumelanin, the main quinone-based biomaterial of the melanin family of compounds, is emerging as a model for medical and sustainable electronic interfaces due to its biocompatibility, biodegradability, and transducing abilities. The study utilizes current-voltage measurements and impedance/dielectric spectroscopy under a controlled hydration atmosphere to investigate the charge transport of eumelanin produced from the S. parvus BSB49 strain. We show no differences in the electrical response in highly hydrated conditions compared to the standard synthetic eumelanin. Hence, our findings provide the groundwork to assess the potential use of this natural eumelanin in sustainable organic (bio)electronic applications.
AtıfScopus13WoS14OpenAlex16İncele - MakaleAçık Erişim2024Scopus SJRQ1Analysis of optical, structural, and morphological properties of a Ti-doped α-Fe2O3 thin film produced through RF and DC magnetron Co-sputtering
Abdolahpour Salari, Maryam; Merhan Muğlu, Günay; Şenay, Volkan; Sarıtaş, Sevda; Kundakçı, Mutlu
In this study, a Titanium (Ti) doped α-Fe2O3 (hematite) thin layer was synthesized onto a glass substrate, employing the simultaneous DC and RF magnetron sputtering method. The investigation focused on examining specific physical properties of the film. The optical, structural, morphological, and elemental features of the resulting Ti-doped α-Fe2O3 thin film were characterized using different characterization techniques. The XRD studies indicated a rhombohedral crystal structure in the studied thin film. The calculation of the Eg value for the thin film, based on absorption measurements, resulted in a value of 2.19 eV. Raman peaks were identified within the range of 218 cm−1 to 1300 cm−1. According to SEM images, the thin film exhibited a uniform surface morphology across the substrate. AFM images revealed a low root mean square (RMS) roughness value, indicating a smooth Ti:Fe2O3 thin film surface.
AtıfScopus24WoS25OpenAlex29İncele - MakaleAçık Erişim2023Scopus SJRQ2Characterization of Bee Bread Produced with Defined Starter Cultures Mimicking the Natural Fermentation Process
Poyraz, Fatmanur; Yalmanci, Dilara; İspirli, Hümeyra; Dertli, Enes
Bee bread is a product with unique properties for humans and bees that is produced through the fermentation of pollen in the honeycomb, mainly caused by lactic acid bacteria (LAB) and yeast strains present in the environment. It is a rich source of nutrients such as proteins, polyphenols and vitamins. Despite the potential nutritional value of bee bread, it is consumed at low levels, as harvesting bee bread from the hives is costly and difficult. This study aimed to produce a standard bee bread by using different strains of the fructophilic lactic acid bacteria (FLAB) Lactobacillus kunkeei and the yeasts Starmeralla magnolia MP-2 and Zygosaccharomyces siamensis MP-14, previously isolated from bee products. In this context, bee bread was produced from pollen by solid-state fermentation using selected FLAB and yeast species, which were then compared with spontaneously developed and commercially available bee bread in terms of microbial stability, physicochemical properties, total phenolic component amounts, in vitro digestibility and amino acid profiles. As a result, it was determined that bee bread made from bee pollen fermented with starter cultures showed improved characteristics than commercial bee bread and was more advantageous in terms of absorption as well as production processes.
AtıfScopus19WoS17OpenAlex18İncele - MakaleAçık Erişim2023Scopus SJRQ2Contribution of Oxidative Stress, Apoptosis, Endoplasmic Reticulum Stress and Autophagy Pathways to the Ameliorative Effects of Hesperidin in NaF-Induced Testicular Toxicity
Emre Kızıl, Hamit; Gür, Cihan; Ayna, Adnan; Darendelioğlu, Ekrem; Küçükler, Sefa; Sağ, Sevda
The ameliorative effects of hesperidin (HES) on the toxicities created by sodium fluoride (NaF) in the testes tissue of rats were studied via oxidative stress, apoptosis and endoplasmic reticulum (ER) stress pathways. The animals were divided into five distinct groups (7 rats in each group). Group 1 was control group, group 2 received NaF-only (600 ppm), group 3 received HES-only (200 mg/kg bw); group 4 received NaF (600 ppm)+HES (100 mg/kg bw) and group 5 received NaF (600 ppm)+HES (200 mg/kg bw) for 14 days. NaF-induced testes tissue damage by reducing activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) and levels of glutathione (GSH), and increasing lipid peroxidation levels. NaF treatment significantly downregulated the mRNA levels of SOD1, CAT and GPx. NaF supplementation caused apoptosis in the testes by upregulating p53, NFkB, caspase-3, caspase-6, caspase-9, and Bax and downregulating Bcl-2. Furthermore, NaF caused ER stress via increasing mRNA transcript levels of PERK, IRE1, ATF-6 and GRP78. NaF treatment led to autophagy via upregulation of Beclin1, LC3A, LC3B and AKT2. In testes tissue, however, co-treatment with HES at doses of 100 and 200 mg/kg significantly reduced oxidative stress, apoptosis, autophagy and ER stress. Overall, the findings of this study suggest that HES may help to reduce testes damage caused by NaF toxicity.
AtıfScopus49WoS46OpenAlex47İncele - MakaleAçık Erişim2023Scopus SJRQ1Palynological, chemical, antimicrobial, and enzyme inhibition properties of Cannabis sativa L. propolis
Özkök, Aslı; Karlıdağ, Semiramis; Keskin, Merve; Bayram, Sinan; Keskin, Şaban; Karabulut, Ercan; Çiçek, Fevzi; Yılmaz, İsmet
In this study, both chemical characterization and biological activities of propolis samples obtained from Cannabis sativa L. (cannabis, hemp, marijuana) isolated colonies (research group) and obtained from colonies at a distance where the bee cannot fly to the isolation area (control group) were determined. Palynological analyses of propolis samples obtained from the research and control group colonies were made and the botanical origin of the cannabis plant and other plants in the research area and the plants in the control group were determined. Bioactive component analysis of propolis extracts was determined by the GC–MS technique. The inhibition effect of propolis samples on some enzymes of medical importance and their antimicrobial effects against many pathogenic microorganisms were also investigated. Palynological analyses showed that honey bees prefer cannabis plants (11.11%) when collecting propolis, and the dry matter percentage (94.6 ± 1.8%), balsam (46.2 ± 5.2%), and wax content (4.8 ± 0.5%), total phenolic (26.44 ± 1.08 mg GAE/mL) and total flavonoid (2.03 ± 0.11 mg QE/mL) content and antioxidant capacity (88.16 ± 2.27 μM FeSO4·7H2O/mL−1) of the research group propolis samples containing hemp were found to be higher than the control group. Also, it was determined that the research group propolis sample contains cannabinoid derivatives (cannabidivarinic acid, 0.29%; delta (1)-tetrahydrocannabinolic acid, 0.59%; cannabidiolic acid, 0.48%), which are active compounds of the cannabis plant. Also, a high inhibition effect was detected on some enzymes of medical importance in propolis samples obtained from cannabis group colonies. In addition, the research group propolis samples also showed a high antimicrobial effect against many pathogenic microorganisms.
AtıfScopus5WoS5OpenAlex4İncele - MakaleAçık Erişim2023Scopus SJRQ2Thermal, rheological, and mechanical characterization of compression and injection molded ultra-high molecular weight polyethylene, high density polyethylene, and their blends
Yang, Huaguang; Yilmaz, Galip; Jiang, Jing; Langstraat, Thomas; Chu, Raymond; van Es, Martin; Garg, Priya; Turng, Lih-Sheng
Tensile and impact test samples of ultra-high molecular weight polyethylene (UHMWPE), high-density polyethylene (HDPE), and their blends at various UHMWPE/HDPE weight ratios were prepared via compression molding and injection molding for thermal, rheological, and mechanical characterization. A twin-screw extruder with either a tapered die with air-cooling or a regular die was used to compound and extrude the materials prior to pelletization and molding. To the best of our knowledge, there has been no publication on pelletizing neat UHMWPE using a regular extruder. The differential scanning calorimetry analysis suggested the occurrence of re-crystallization and co-crystallization for all the blends. The rheology test confirmed that all the blends exhibited a solid-like behavior and the degree of compatibility increased with increasing HDPE content in the blends. A strong synergistic effect was observed the blends possessed a higher tensile and impact strength than their neat UHMWPE and HDPE counterparts. The compression molded (95/5) UHMWPE/HDPE samples extruded using the tapered die yielded the highest tensile strength (50.1 MPa), which was about 40% higher than that of the neat UHMWPE samples. The best composition of these blends for compression and injection molded parts is 10% HD and 50% HD, respectively.
AtıfScopus13WoS13OpenAlex14İncele - MakaleYalnız künye2024Scopus SJRQ1The effect of nurse-led motivational interviewing based on the trans-theoretical model on promoting physical activity in healthy older adults: A randomized controlled trial
Sönmez Sari, Ebru; Kitiş, Yeter
Aim: The aim of this study was to evaluate the effect of motivational interviewing based on the trans-theoretical model promoting physical activity in older adults. Methods: A randomized controlled trial study was conducted with 117 older adults (intervention group: 58, and control group: 59) between April and November 2019. The data were collected via a questionnaire, trans-theoretical model scales, the Physical Activity Scale for the Elderly, the Katz Activities of Daily Living scale and a pedometer. The 24-week intervention consisted of regular motivational interviewing. The control group received usual care at the family health centre. Results: Following the intervention, the Intervention Group showed significant improvements Exercise Processes of Change Scale, Exercise Self-Efficacy Scale and Perceived Benefits of the Decisional Balance Scale for Exercise. There was a significant difference between the groups in terms of stages of change. In the Intervention Group, 81.5% were in the contemplation stage in the pre-test, while in the post-test, 70.4% had transitioned to the action stage. In contrast, in the control group, 62.5% were in the contemplation stage initially, but in the post-test, only 9.3% had reached the action stage. The mean number of step counts increased significantly in favour of the Intervention Group, as did the Physical Activity Scale for the Elderly total score. Conclusion: The trial indicated that after the trans-theoretical model-based motivational interviewing, the stages of change among the older adults improved, as did their exercise behaviours. It is recommended that the trans-theoretical model and motivational interviewing be used by nurses to improve healthy lifestyle stage behaviours in older adults.
AtıfScopus14WoS12OpenAlex12İncele - MakaleAçık Erişim2024Scopus SJRQ2An optimization study for amino acid extraction from bee bread using choline chloride-acetic acid deep eutectic solvent and determination of individual phenolic profile
Kutlu, Naciye; Gerçek, Yusuf Can; Çelik, Saffet; Bayram, Sinan; Ecem Bayram, Nesrin
In this study, the aim was to optimize the extraction conditions (molar ratio, time, temperature) in order to maximize the total individual amino acid (TAA) yield from bee bread, which is a fermented bee product, using choline chloride-acetic acid deep eutectic solvent (DES). In addition to the phenolic profile and amino acid profile investigated by LC-MS/MS, some spectrophotometric (total phenolic content, total flavonoid content, total proanthocyanidin content) and bioactivity (antioxidant/antimicrobial activity) tests were carried out on the extracts. Optimum conditions were determined as 1:2 for molar ratio, 15 min for time and 10 °C for temperature with optimization based on the TAA values of the different extracts (d: 0.99). Molar ratio and temperature were found to have statistically significant effects on TAA values. At optimum conditions, the amount of TAA obtained with DES (29.678 g/kg) was found to be approximately 35.2% and 54.4% higher than that obtained with ethanol and methanol extracts, respectively. All these results indicate that choline chloride-acetic acid DES can be chosen when preparing bee bread extracts, which are evaluated for different areas of use such as food and health due to active ingredient content. Higher active ingredients can be extracted by trying different DES combinations.
AtıfScopus7WoS9OpenAlex11İncele - MakaleAçık Erişim2024Scopus SJRQ1An Investigation of Rater Effects on L2 Translation Performance Scores
Aybirdi, Nilufer; Han, Turgay
This study examines the impact of L2 translation quality and rating experience on raters’ scoring behaviours and the reliability and variability of scores. It also investigates frequently used decision-making strategies applied by raters assigning scores to different qualities of translation papers produced by Turkish EFL students. In total, 80 translation papers (40 low-quality and 40 high-quality) obtained from the participants were given to 10 raters to score using a translation scoring rubric. Results revealed that less experienced raters were more positive while scoring the students’ translation performances and assigned higher and more consistent scores to the papers.
- MakaleYalnız künye2023EXAMINING COGNITIVE STRUCTURES OF SECONDARY SCHOOL STUDENTS REGARDING CONCEPTS RELATED TO MULTICULTURAL EDUCATION
Yılmaz, Sevda
The aim of this study was to investigate the cognitive structures of secondary school students regarding concepts related to multicultural education. The study was conducted through a survey design. The study group consisted of 189 eighth-grade students studying in secondary school. Out of the 189 participants, 97 were female and 92 were male. The criterion sampling method, one of the purposeful sampling methods, was used in the selection of the study group. Word Association Test was used as a data collection tool for the research. According to results of the study, it was determined that secondary school students associated the most words with the concept of culture and the fewest words with the concept of respect. In addition, it has been determined that there is a misconception in the cognitive structures of the students regarding the perceptions of justice and equality. The research results has also shown that the students only weakly correlated concepts related to multicultural education.
- MakaleYalnız künye2023Scopus SJRQ3Modified distance optimization method for the asymmetric bioreduction conditions of phenyl(thiophen-2-yl)methanone by Weissella paramesenteroides N7
Özdemir, Akın; Şahin, Engin
Chirality plays a significant part in life since it is closely linked to carrying out the many metabolic processes that make up a living being. Chiral secondary alcohols such as diaryl-, aryl heteroaryl-, and diheteroaryl are employed in pharmaceuticals as drug intermediates. Although biocatalytic asymmetric reduction of prochiral ketones containing aromatic and heteroaromatic groups is widely known, biocatalytic reduction of heteroaromatic prochiral ketones containing sulfur heteroatoms is rarely known. Very few studies exist in the literature, including the biocatalytic reduction of phenyl(thiophen-2-yl)methanone (1). Moreover, the biocatalytic reduction of 1 with a mathematical modelling and optimization technique is unknown until now. In this study, Weissella paramesenteroides N7 biocatalyst for the asymmetric bioreduction of 1 using a novel modified distance optimization method. Optimization conditions were found as pH = 6.46, temperature = 26 °C, incubation period = 71 h, agitation speed = 200 rpm by the modified distance optimization method, and it was determined that the conversion and enantiomeric excess (ee) under these conditions could be 98.7% and 98%, respectively. Under these proposed optimization conditions, (S)-phenyl(thiophen-2-yl)methanol ((S)-2) was obtained with >99% ee, >99% conversion, and 97% yield. In addition, 11.29 g of 1 was completely converted into (S)-2 (11.07 g, 97% isolated yield) under optimized conditions. This is the first report about the fabrication of enantiopure (S)-2 in high gram scale using a biocatalyst and a novel modified distance optimization technique. In this study, the successful applicability of the new modified distance optimization method in biocatalytic asymmetric reduction reactions has been successfully demonstrated.
AtıfScopus3WoS3OpenAlex5İncele - MakaleYalnız künye2024Scopus SJRQ1A Novel Fuzzy Cumulative Sum Control Chart with an α-Level Cut Based on Trapezoidal Fuzzy Numbers for a Real Case Application
Özdemir, Akın; Uçurum, Metin; Serencam, Hüseyin
Statistical process control (SPC) is widely used to monitor production processes in many industries under certain conditions. When dealing with a quality characteristic for uncertainty, fuzzy numbers are used in the context of the statistical process control (SPC) to monitor a fuzzy production process. The aim of this paper is fourfold. One, a fuzzy X¯-R control chart with an α-level cut is used based on trapezoidal fuzzy numbers (TFNs) for detecting the large shifts in the fuzzy process mean. Second, a fuzzy cumulative sum (FCUSUM) control with an α-level cut based on TFNs is firstly developed for detecting the small shifts in the fuzzy process mean. Third, the fuzzy process capability indices (FPCIs) are presented to measure the fuzzy process performance. Finally, an ultra-fine calcite production process is controlled with both the fuzzy X¯-R control chart and the proposed FCUSUM control chart. The results of the fuzzy X¯-R control charts show that the fuzzy production process is in control, and large shifts in the fuzzy process mean were detected. On the other hand, the results of the FCUSUM charts show that the fuzzy production process is out of control, and small shifts in the fuzzy process mean were detected. FPCIs are also conducted, and the results of fuzzy Cpk indices show that the ultra-fine calcite production process is not capable of meeting specification limits.
AtıfScopus7WoS9OpenAlex9İncele - MakaleAçık Erişim2024Scopus SJRQ3InvestIgatIon of cytotoxIcIty and antIbacterIal effect of boron-contaInIng nano-hydroxyapatIte
Aydın, Numan; Karaoğlanoğlu, Serpil; Süloğlu, Aysun Kılıç; İdil, Neslihan; Demir, Merve; Karakaş, İbrahim Hakkı
Introduction: Different regenerative materials are used to protect and stimulate pulp tissue. Objectives: This in vitro study aimed to examine the cytotoxicity of different doses of boron-containing nano-hydroxyapatite (B-nHAp) and its antibacterial effect. Material and methods: B-nHAp was synthesized with microwave-assisted chemical precipitation method at different rates, such as 1%, 5%, and 10%. The extracts were prepared in separate tubes: 1%, 5%, 10% B-nHAp, and nHAp 50 mg/ml. Cytotoxicity test was performed on L929 mouse fibroblasts for 24 and 72 hours. Antibacterial analysis was performed with Streptococcus mutans bacteria using micro-dilution method. Cell viability values were evaluated with two-way analysis of variance (ANOVA) test (p < 0.05). Results: B-nHAp was successfully synthesized in XRD and SEM analyses. Nano-hydroxyapatite showed more cell viability than control group at 24 and 72 hours. All B-nHAp extracts demonstrated less cell viability at the end of 24 hrs. than control group. However, 1% B-nHAp cell viability decreased more in the B-nHAp group compared with the control group, while 5% and 10% B-nHAp showed high cell viability after 72 hours of incubation. B-nHAp demonstrated less antibacterial effect on Streptococcus mutans compared with nHAp. Conclusions: According to the results, the addition of boron to nano-hydroxyapatite does not make a significant contribution to increase the regenerative and antibacterial properties of the material.
AtıfScopus4OpenAlex5İncele - MakaleAçık Erişim2024Scopus SJRQ1An investigation of cyberloafing behaviors in learners of Turkish as a foreign language
Güngör, Haluk; Ustabulut, Mete Yusuf
Cyberloafing can be defined as using technological devices for extracurricular activities during the lesson. The misuse of technological tools and facilities in educational environments causes many learning problems. One of the most important behaviors that cause this problem is cyberloafing. The explorative and main aim of the current study is to examine the reasons behind the cyberloafing behaviors of those who learn Turkish as a foreign language in terms of various variables and explore the phenomenological point of view of participants. The research was carried out in accordance with the convergent parallel mixed method design. The “Cyberloafing Behaviors Scale” was employed to collect quantitative data from a total of 207 students learning Turkish in 5 different TÖMER (Teaching Turkish Center); in the process of qualitative data collection, open-ended questions formed by the researcher were used. For examining mean differences in terms of categorical variables t-test and separate ANOVAs were run. In ANOVAs, in order to minimize the possibility of error that may occur in the ANOVA test, type I error was controlled with Bonferroni correction. To determine predictors of cyberloafing behaviors of the study group multiple regression analysis was utilized. According to the findings of the current study, there was no significant difference between gender and time spent on social media and cyberloafing behavior; in the real-time updating dimension, it was determined that there was a significant difference between the B1 level and B2 and C1 levels. Having devices such as laptops stands out as the variable that predicts cyberloafing the most. It was also observed that cyberloafing behavior decreased as speaking skill increased. When the qualitative data was examined, the students stated that they were cyberloafing due to reasons such as messaging, sharing photos and videos because of boring lessons.
AtıfScopus3WoS4OpenAlex4İncele - MakaleAçık Erişim2023Scopus SJRQ3Numerical investigation of the Mode I/Mode II fracture behavior of the hybrid composite joints with a hybrid bondline
Erbayrak, Engin
In this study, the fracture behavior of fracture characterization bonded joints consisting of hybrid composite adherends and hybrid bondlines under Mode I and Mode II loadings were investigated numerically. Numerical analysis was performed using LS-DYNA. Hybrid composite laminates (HCGFRE) obtained by sequencing plain woven glass fiber reinforced epoxy (GFRE) and plain woven carbon fiber reinforced laminates (CFRE) as adherends. Araldite AV138M and Araldite 2015 epoxy adhesives were also used to create the hybrid bondline. Mode I and mode II fracture behaviors were determined by numerical modeling of the Double Cantilever Beam (DCB) and End Notched Flexural (ENF) tests, respectively. In the numerical model, firstly, the fracture parameters of the relevant adhesives were found in the literature, and verification was made utilizing the numerical model. Then, the fracture behavior in both two modes was examined by forming a hybrid bondline. In the literature, there are restricted studies examining the fracture behavior of fracture characterization bonded joints with hybrid bondlines. Additionally, it is not encountered any study determining the both mode I and mode II fracture behavior of composite fracture characterization bonded joints with hybrid bondlines. Therefore, it is thought that this study will gain significant novelties to the existing literature.
AtıfScopus1OpenAlex2İncele - MakaleAçık Erişim2024Scopus SJRQ3Organizational Overview of Maslow and Management Research
Durmuş, İbrahim
Maslow's theory of motivation or hierarchy of needs; has been the subject of much research on a global scale in the physiological, psychological, and sociological framework. This situation, especially in terms of organizations (public or private), concerns both the employees and the management mechanism. Maslow and management generally reveal the theoretical and relational results in the policies applied in organizations. In the literature, studies in which studies carried out in Maslow and management research are systematically expressed quite limited. The research was carried out using the R program and bibliometric analysis applications with the help of the WoS database on Maslow and management research. As a result of the research analysis, the most emphasized keywords by the authors; motivation, Maslow, Maslow's hierarchy of needs, needs hierarchy, needs, management, self-actualization, leadership, psychology, innovation, sustainability, job satisfaction, China, satisfaction, commitment, human psychology, human needs, Covid-19, management theory, personality division, hierarchy, Maslow's theory, performance, spirituality, sustainable development, theory, Abraham Maslow, creativity, productivity, quality life, rural, safety, culture, values, need, human resource management, well-being, workplace, academic libraries cold war, behavior, cognition, demand, and development. As a result of the analysis, it was understood that the concepts of management, performance, work, job satisfaction, personality, self, attitudes, environment, healthcare, perceptions, participation, antecedents, and science have strong relationships together. The results obtained in Maslow and management research have revealed that organizational activities are also effective in addition to the needs and psychological aspects of individuals.
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