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Factors affecting total quality management in e-commerce businesses
No full textBu çalışma, Azerbaycan'daki e-ticaret işletmelerinde Toplam Kalite Yönetimi (TKY) uygulamalarını inceleyerek, bu alandaki literatürdeki boşluğu doldurmayı amaçlamaktadır. Araştırmada, e-ticaret sektöründe kalite yönetiminin etkinliği ve dijital pazarlama araçlarının müşteri memnuniyeti ve marka bilinirliği üzerindeki etkileri ele alınmıştır. Çalışmada anket ve mülakat yöntemleri kullanılarak, Azerbaycan'da faaliyet gösteren büyük e-ticaret işletmelerindeki kalite yönetimi uygulamaları değerlendirilmiştir. Bulgular, TKY'nin e-ticaret işletmeleri tarafından büyük ölçüde benimsendiğini ve müşteri memnuniyetini artırmada önemli bir rol oynadığını göstermektedir. Ayrıca, dijital pazarlama araçlarının müşteriyle etkileşimi artırdığı ve markaların rekabet avantajı elde etmesine yardımcı olduğu tespit edilmiştir. Araştırma, e-ticaret sektöründe kalite yönetimi ve dijital pazarlamanın etkileri konusunda gelecekte yapılacak çalışmalara katkı sağlamayı hedeflemektedir.This study aims to fill the gap in the literature in this field by examining Total Quality Management (TQM) practices in e-commerce businesses in Azerbaijan. In the research, the effectiveness of quality management in the e-commerce sector and the effects of digital marketing tools on customer satisfaction and brand awareness were discussed. In the study, quality management practices in large e-commerce businesses operating in Azerbaijan were evaluated by using survey and interview methods. The findings show that TQM has been widely adopted by e-commerce companies and plays an important role in increasing customer satisfaction. Additionally, digital marketing tools have been found to increase customer interaction and help brands gain a competitive advantage. The research aims to contribute to future studies on the effects of quality management and digital marketing in the e-commerce sector
A Computerized Adaptive Approach to Measuring Faculty Assessment Literacy
No full textThe purpose of this study was to generate an item bank for assessing faculty members' assessment literacy and to examine the applicability and feasibility of a Computerized Adaptive Test (CAT) approach to monitor assessment literacy among faculty members. In developing this assessment using a sequential mixed-methods research design, our goal was to create a simple, quick, and precise screening tool for assessing literacy in higher education. After defining the construct of assessment literacy within the higher education context, we developed the test blueprint and items, and subjected them to a series of expert reviews. Following a pilot administration to confirm feasibility, we conducted item parameter calibration using a representative sample of faculty members (n = 211) selected through a convenience sampling approach. We evaluated the items for evidence of adequate psychometric quality, including fit, targeting, and unidimensionality under the Rasch framework. We concluded that developing an adaptive test for measuring assessment literacy is possible even with a small item pool and a small calibration sample.Scientific and Technological Research Council of Turkiye (TUBITAK)The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by the Scientific and Technological Research Council of Turkiye (TUBITAK) to conduct the study at a research site in the United States
Genetic Variation of Tilia tomentosa Moench Populations in Yenice of Karabük
No full textKBÜBAP-17-KP-388Türkiye'de olduğu gibi Karabük-Yenice'de de en geniş yayılış yapan Tilia tomentosa'nın (gümüşi ıhlamur) beş popülasyonunda (Camiyani, Kavaklı, Karakaya, Kayadibi ve Kızılkaya) üstün ağaçlar seçilmiştir. Üstün ağaç seçiminde kuruldaki çiçek sayısı, çiçeklenme oranı ve tepe büyüklüğünü içeren bir indeks kullanılmıştır. Seçilen 101 üstün ağacın 53 adedinden tohum toplanmıştır. Ortak bahçe denemesinde, tesadüf parselleri deneme deseni kullanılarak, her bir üstün ağaç tohumları Gökçebey Orman Fidanlığı alanına ekilmiştir. Yetişen fidanlarda birbirini izleyen 2 yıl kök boğazı çapı (mm) ve boy (cm) ölçülmüştür. Kök boğazı çapı ve boy özelliklerinde, her iki yılda da popülasyonlar arası istatistik farklılık görülmemiştir. Bununla birlikte, aileler arasında (popülasyon içi) boy farklılığı istatistik olarak anlamlı bulunmuştur. Boy için birinci yıl ve ikinci yıl bireysel kalıtım dereceleri 0.13 ve 0.29, aile ortalamaları kalıtım dereceleri aynı sırayla 0.31 ve 0.51 olmuştur. Fidanların kök boğazı çapı ve boyu arasında aile düzeyinde fenotipik korelasyon birinci yıl 0.68 ve ikinci yıl için 0.59 olmuştur. Gümüşi ıhlamurda yapılmış bu ilk çalışma, Karabük-Yenice'de bulunan gümüşi ıhlamur popülasyonları için tohum transfer kurallarına gerek olmadığı, boy özelliğinde ise aileler arasında genetik varyasyon olduğu ortaya çıkmıştır. Türkiye'de ve Karabük-Yenice'de en çok yayılışı olan gümüşi ıhlamur, ıhlamur çiçeği üretimi ve ekolojik açıdan ormanlarda karışım ağacı olarak önemlidir. Sürdürülebilir orman yönetimi için tür üzerinde daha ileri araştırmalar yürütülebilir.Plus trees were selected from five populations (Camiyani, Kavaklı, Karakaya, Kayadibi and Kızılkaya) of silver linden (Tilia tomentosa), which has the broadest distribution of linden species in Karabük-Yenice as well as in Türkiye. An index including the number of flowers in an inflorescence, flower rate in the crown, and crown size were used to select plus trees. Seeds were collected from 53 of the 101 selected plus trees. The seeds of each plus tree were sown in the Gökçebey Forest Nursery area using a completely randomized plot design in a common garden test. Root collar diameter (mm) and height (cm) were measured on the seedlings for two consecutive years. No statistical difference was observed between the populations in root collar diameter and height traits in both years. However, the height difference between families (within the population) was statistically significant. For height, individual heritabilities in the first and second years were 0.13 and 0.29, and family mean heritabilities were 0.31 and 0.51, respectively. Phenotypic correlations between root collar diameter and height at the family level were 0.68 in the first year and 0.59 in the second year. This first study on silver linden revealed that seed transfer rules were not required for silver linden populations in Karabük-Yenice and that there was genetic variation among families for height traits. Silver linden, the broadest distribution in Türkiye and Karabuk-Yenice, is crucial for linden flower production and a mixture tree in forests. For sustainable forest management, further research on the species may be conducted.Karabük Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi [EN] Scientific Research Projects Coordination Unit of Karabuk Universit
Actual and Potential Trend Analysis Under Climate Change Using Risk Sen's Slope (RSS) in Western Black Sea Basin in Türkiye
No full textSeveral classical and innovative trend methods exist in the literature to identify and evaluate the effects of climate change on hydro-meteorological variables. Among the classical methods, the most commonly used ones are modified Mann-Kendall (MMK) and Sen's slope (SS). As for the innovative methods to identify potential trends (probable risk levels) in hydro-meteorological variables depending on changing the initial conditions and temporal dynamic development behaviour of the trends, the risk Sen's slope (RSS) method was proposed based on different risk values. The actual trends are proposed in this research to comprehensively understand and analyse the climate change trend over the entire period. It uses RSS and the classical trends MMK and SS. Also, the spatiotemporal classical, actual and potential trends in meteorological variables are evaluated. Additionally, the advantages of the RSS method compared with classical SS are discussed in detail. The Western Black Sea basin in T & uuml;rkiye, with monthly total precipitation and monthly average temperature data from 1961 to 2023, is selected as a representative application. The temperature trend results show that the 0.99 risk level gave approximately 25% higher slope than SS. The maximum temperature-increasing trend within the study area and the time period at 0.99 risk level is 2.10 degrees C. However, the differences between precipitation trend slopes obtained by SS and RSS for different risk levels are relatively low. Furthermore, using different slopes corresponding to several risk levels allows for more proactive and effective measures for sustainable agricultural activities and water management. The actual temperature trend within the basin ranges between 1.33 degrees C and 2.09 degrees C, and the actual precipitation trend ranges between 2.78 and 12.74 mm over the study period
Design, Synthesis, In Vitro, and In Silico Studies of 5-(Diethylamino)-2-Formylphenyl Naphthalene-2-Sulfonate Based Thiosemicarbazones as Potent Anti-Alzheimer Agents
No full textAlzheimer's disease (AD) is known as one of the more devastating neurodegenerative diseases diagnosed in older people. Cholinesterase inhibitors (ChEI) can be used as an effective palliative treatment for AD. An extensive range of new biologically active 4-(diethylamino) salicylaldehyde-based thiosemicarbazone derivatives 5(a-u) was synthesized and evaluated as inhibitors of cholinesterase (ChE) and monoamine oxidase (MAO) enzymes. 2,3-Dichloro-substituted compound 5u was the most potent inhibitor of AChE and MAO-A with IC50 values of 12.89 and 96.25 nM, respectively. In contrast, the 2,3-dichlorophenyl-substituted compound 5a was the most powerful inhibitor of BChE, with an IC50 value of 124.72 nM. Structure-activity analysis revealed that the electron-withdrawing substituents on the phenyl ring play a crucial role in the inhibition potential of synthesized compounds. Compound 5a showed the strongest binding with 4BDS (-11.3 kcal/mol) via hydrogen bonds and pi-interactions. Compound 5u exhibited high affinity with 1B41 (-8.2 kcal/mol), 2Z5X (-8.6 kcal/mol), and 2V5Z (-7.8 kcal/mol), forming key hydrogen bonds, salt bridges, and pi-interactions, highlighting its multi-target potential. In silico ADME, pharmacokinetics, and drug-likeness studies were conducted and compared with the standard drugs galantamine and clorgyline.This Project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, under grant no. GPIP: 46-665-2024.; Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah [46-665-2024]; GPIP; Alexander von Humboldt Foundation; Universita degli Studi di Genova, as part of the Wiley - CRUI-CARE agreementThis Project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, under grant no. GPIP: 46-665-2024. The authors, therefore, acknowledge with thanks DSR for technical and financial support. Z.S. is thankful to the Alexander von Humboldt Foundation for the award of Return Fellowship. Open access publishing facilitated by Universita degli Studi di Genova, as part of the Wiley - CRUI-CARE agreement
Collaborative Learning in Preschool Education: Teacher Perspectives and Practices
No full textOne of the methods used to achieve desired learning outcomes in preschool education is collaborative learning. The purpose of this study is to determine the views and practices of preschool teachers regarding collaborative learning, which is a basic qualitative study. Data were collected through a demographic information form, semi-structured interviews, structured observations, and examination of activity schedules. Descriptive analysis and document review methods were used to analyze the data. According to the findings, most teachers defined collaborative learning as cooperation and group work. They emphasized the contributions of these practices to children's socio-emotional development, improvement of communication skills, and adaptability. In addition, teachers expressed a preference for implementing collaborative learning, particularly in arts activities, and noted that the lack of cooperation among children could complicate the process. Observations and examination of activity plans revealed that teachers encouraged children to work together, intervened when necessary, and supported multidirectional communication between children within groups. In addition, similarities and differences between collaborative learning plans and their implementation were observed
Analysis of seismic ground response and soil-structure interaction on step-like topography due to rock-outcrop motions
No full textThis study presents the impact of step-like ground slopes on free-field motions at different excitation frequencies. Furthermore, numerical analyses were also performed to evaluate how variations in dynamic soil displacements due to kinematic interaction affect the seismic response of the building. To analyze the complex wave propagation mechanism within the scope of this study, 1-D and 2-D wave propagation models were developed using the geometry and the dynamic soil properties based on the literature. The 2-D finite element model of topographical irregularities was calibrated in terms of lateral acceleration behavior using both recorded values and previously computed data by researchers. The evaluation of seismic ground response includes the amplification effects on acceleration-time histories and the response spectra utilized in seismic codes. Additionally, the 2-D dynamic response of buildings with different periods was investigated considering the influence of topography-soil-structure interaction resulting from rock-outcrop motions. Results indicate significant role of particular factors in the variability of intense amplification
The effects of GenAI on learning performance: A meta-analysis study
No full textArtificial Intelligence (AI) has become increasingly prevalent in education, and Generative AI (GenAI) has emerged as a new concept in AI technology. Educators continue to debate the advantages and disadvantages of GenAI in education. To guide these discussions, further analysis is needed to determine the impact of GenAI on educational outcomes. This study aims to investigate the effect of GenAI on learning performance using the meta-analysis method. This meta-analysis study synthesized the results of 31 articles involving 2646 participants. The results show that GenAI has a moderately positive effect on learning performance (g = .689). There is no publication bias in determining the validity of the effect. The analysis included the effect sizes of seven moderator variables: sample level, sample size, research design, learning domain, research setting, intervention duration, GenAI tool, and testing format. Only intervention duration, GenAI tool, and testing format significantly moderated the effectiveness of GenAI on learning performance
Synthesis of Semiconductor Zinc Sulfide Nanospheres for Improving Piezoresistive Sensing Behavior of Melt-Mixed Poly(vinylidene fluoride)/Carbon Nanotube Composites
No full textStudies have increasingly aimed at improving the piezoresistive behavior of polymer-based conductive composites (CPCs) for strain-sensing, with inorganic nanomaterial enhancement offering research opportunities. This study investigates the impact of incorporating zinc sulfide nanospheres (ZnS NSs, 1-7 wt.%), synthesized via a one-step hydrothermal method, into a poly(vinylidene fluoride) (PVDF) polymer matrix together with multi-walled carbon nanotubes (MWCNTs). Field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) analyses reveal that ZnS NSs comprise a mixture of ZnS0.96O0.04 and S phases. While of ZnS NSs minimally impact tensile properties of the PVDF/MWCNT composites, they reduce elongation at break at 5 wt.%. During 15-cycle strain sensing up to 3% strain, ZnS NSs-enhanced composites outperformed PVDF/1 wt.% MWCNT. The reference sample's resistance change ratio (Delta R/R0) decreased below 1% with increased cycles, while 1 wt.% ZnS NSs increased Delta R/R0 to 3%, reducing changes upon cycle increments. Higher ZnS NSs levels (3-7 wt.%) resulted in Delta R/R0 exceeding 4-5%, indicating enhanced strain sensing performance. Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) showed limited impact of ZnS NSs on the thermal properties and microstructure of the composites.Bartimath;n University Scientific Research Projects Unit [2023-FEN-Idot;HP-002]; COST Action; Scientific and Technological Research Council of Turkey (TUBITAK); [CA19118]The authors thank U. Jentzsch-Hutschenreuther for compression molding of the samples, M. Heber for SEM imaging of the composites, H. Scheibner and K. Scheibe for help with the piezoresistive tensile testing, K. Arnhold for DSC/TGA measurements, and. M. Malanin for FTIR experiments (all from IPF). The consumables and equipment used for synthesizing metal oxide nanoparticles in the present study were partially funded by the Bart & imath;n University Scientific Research Projects Unit (Project No: 2023-FEN-& Idot;HP-002). The author, M.K., was supported by grants from the COST Action CA19118 -High-performance carbon-based composites with smart properties for advanced sensing applications (EsSENce), and the Scientific and Technological Research Council of Turkey (TUBITAK) BIDEB-2219 Postdoctoral Research Program for his stay at the Leibniz-Institut fuer Polymer-Forschung Dresden e.V. (IPF), Dresden, Germany
Protective nickel silicide coating on Inconel 738 superalloy: Microstructure and wear behavior
No full textSilicides with potential to form a protective silica layer have attracted significant attention in recent years in protecting engineering materials. This study reports on the formation process and microstructural, mechanical and wear behaviour evolution of Ni-silicide layers formed by pack siliconizing of Inconel 738 alloy at deposition temperatures between 800 and 900 degrees C for 2, 4 h. SEM results reveal that NiSi based intermetallic coatings are obtained successfully on the surface of the Ni Based Alloy. XRD results show that NiSi, Ni3Si2, Ni2Si phases are the main constituents of the coatings and Cr-rich phase forms on the surface of siliconized coatings thanks to the high Cr content of the Inconel 738 Alloy. Surface hardness and wear resistance of the Inconel 738 are dramatically improved by siliconizing. However, the results were affected by the type of silicide layer. It was observed that the Cr rich silicide layer was much more successful in hardness and wear resistance