bluuebunny/crossref_metadata_2025 huggingface dataset:
The Role of Job Satisfaction and Organizational Commitment in Mediating the Influence of Transformational Leadership on the Performance of Police Personnel Polda Sultra Work Unit
Authors: . Suhirno , Madjid Rahmat , Sukotjo Endro , . Yusuf , Junaiddin Arsyad
Published: October 2023

Improving organizational performance requires considering employees' work attitudes and behaviours. Inconsistent training can lead to a lack of initiative and responsiveness, decreasing performance. This study aimed to examine the impact of transformational leadership on job satisfaction and organizational commitment in mediating the influence on police personnel performance. The study included 275 individuals, and data was collected through questionnaires and SEM modelling. The findings showed that transformational leadership significantly impacted job satisfaction, organizational commitment, and police personnel performance. Job satisfaction and organizational commitment were interconnected and significantly affected police personnel performance. Transformational leadership also impacted police personnel performance through organizational commitment and job satisfaction. The study has important implications for leaders seeking to strengthen job satisfaction and organizational commitment, leading to increased performance among police personnel. Future research may investigate other variables related to job satisfaction.
The Effect of Participative Leadership on Organizational Commitment with Impact on Work Productivity Vocational School Teachers in Mataram City
Authors: Jaelani Abdul Kadir , Agung Anak Agung Gede , Yudana I Made , Dantes Kadek Rihendra
Published: October 2023

The productivity of vocational school teachers in Mataram City is low, teacher performance is influenced by head leadership and work motivation. The purpose of this study was to determine the effect of participatory leadership on organizational commitment and its impact on the work productivity of vocational schoolteachers in Mataram City. This research method is quantitative. The technique of determining the sample was 721 people randomly based on Morgan's theory confirmed by the Warwick and Lininger formula to obtain data for 259 teachers. Hypothesis analysis using Structural Equation Modeling - Partial Least Squares technique. The results of the study are; (1) participative leadership has a direct positive and significant effect on organizational commitment as evidenced by the T-Statistic 7.835 and P-Values 0.000; (2) participative leadership has a direct positive and significant effect on teacher performance as shown by the T-Statistic 7.007 and P-Values 0.000; (3) organizational commitment has a direct positive and significant effect on teacher performance shown T-Statistic 2.226 and P-Values 0.012 (4) participative leadership has an indirect effect on work productivity through organizational commitment with T-Statistic 2.606 and P-Values 0.009. The finding of this study is that organizational commitment mediates the effect of participatory leadership on the work productivity of vocational school teachers in Mataram City. It is concluded that participative leadership affects organizational commitment and organizational commitment.
A New Perspective in the Evolution of Innovation Models Through Literature Review
Authors: Mauricio Bedoya-Villa, , César Zapata- Molina, , Steve Baeza-Abadie, , Elkin Pérez-Sánchez, , Blanca Hernández-Sanchéz, , Erika Jiménez-Correa,
Published: October 2023

The new competitive scenarios in an economic environment characterized by globalization require constant adjustment of business strategies to generate new forms of managing organizational resources to promote innovation and the development of distinctive skills, and consequently achieve greater levels of competitive advantage and economic growth.  This entails that companies must recognize the strategic value of innovation and incorporate innovation models into their management practices. This paper describes the last decade's evolution from a wide diversities of approaches regarding innovation models found in the review of the literature to determine how businesses may incorporate innovation models as a source of competitive advantage. A review of the literature was conducted by using the Scopus database to synthesize and analyze existing publications, particularly the conceptual frameworks in the innovation models proposed by researchers. The results obtained demonstrate the existence of key elements proposed for the development of innovative models, and the need to implement cyclical, ecological and dynamic innovation models to strengthen innovation management improving firms' adaptability in the technological environment. This paper his paper contributes to a growing body of literature and providing insight into how the joint of a new typology of innovation models creates a new perspective and provides an interesting and useful combination of conceptual frameworks for the development of innovation as a continuous process in management innovation models in organizations.
The Limitation of The Effectiveness of Google Classroom as An Online Platform in During the Coved-19 Pandemic in Iraqi Universities
Authors: Jawoosh Hayder N. , Alshukri Harith Abdelelah , Jawoosh Fatmah Nazar , Azzawi Zahraa Saad , Kzar Mazin Hadi
Published: October 2023

The popularity of the Web and rapid developments in its tools have had a clear impact on the educational field. Many countries try to take benefit of the advantages provided by the Web like online learning programs. This paper shows the effectiveness of the Google Classroom platform as an alternative to material lectures on the campus during the application of quarantine considering the outbreak of the Coronavirus (COVID-19). This study was applied to the Iraqi public and private universities scattered in different regions of the country. The data was collected by sending an online questionnaire. Technology Acceptance Model (TAM) was adapted to examine the effectiveness of learning online activity. The number of answers was 1704, which were collected online from male and female college students. The student's difficulty in dealing with Google Classroom as an alternative to attending inside campus appears in the data analysis section, where the data of the statistical analysis of this study showed negative results in terms of Google Classroom subscales like the ease of use, perceived usefulness, communication, and interaction and perceive instruction delivery. On the other hand, some positive results appeared related to the student’s satisfaction in using Google Classroom. This finding indicates that Google classroom to be a difficult medium of use for students due to the universities and the lecturers in Iraq never uses such online programs in their studies.
Creating Moral and Ethical Tales of Pre-service Teachers of Early Childhood Education Programme By using Backward Design
Authors: Waiyaroop Suphanwadee , Khan Muhammad Shahid
Published: October 2023

Fairy tales play a vital role in fostering early childhood development. Learning to create fairy tales, especially fairy tales that can promote morality and ethics for early childhood children, will result in appropriate and sustainable social development for children. As well as resulting in pre-service teachers learning meaningfully and valuablely. Able to innovate on their own individual potential with a backward design learning model that encourages pre-service teachers and educators to know and understand common goals. This study aims to investigate the effectiveness of using a backward design learning approach to teach moral-ethical storytelling to pre-service teachers in early childhood education. Specifically, it seeks to compare the story-building skills of such pre-service teachers before and after the application of the aforementioned approach. The study sample comprises 36 second-year early childhood education students from the 2021 academic year. The literature and tales used in the study were selected via cluster random sampling. The research instruments employed included backward design learning plans and a morality-ethical storytelling test, with data analyzed through average and standard deviation statistics. The findings indicate that the backward design learning approach can develop the creation of moral and ethical tales for pre-service teacher s and the students had higher ethical storytelling skills after the backward design learning management than before the experiment in all aspects. Develop learning skills that can be applied in real life And see the results that can be used in the future, along with cultivating early childhood children to grow up to be good citizens of society with quality.
Construction of the Evaluation Index System for High-Quality Development of Sports Tourism in Guangxi
Authors: Bai Qingping , Potimu Kittipong , Raju Valliappan
Published: October 2023

In order to comprehensively and systematically assess the high-quality development of sports tourism in Guangxi, this study, based on the new development concept and the theory of high-quality development, constructed an evaluation index system for the high-quality development of sports tourism in Guangxi. Research methods employed in this study included literature review, Delphi method, exploratory factor analysis, and confirmatory factor analysis to determine and validate the evaluation index system. The study focused on 529 tourists participating in sports tourism in Guangxi. The results revealed that the evaluation index system for the high-quality development of sports tourism in Guangxi consisted of 5 primary indicators, 8 secondary indicators, and 44 tertiary indicators, all of which passed the tests for convergent validity, discriminant validity, and fitting of a model.
The effect shipper, carrier, and supervisory management data mining of online freight platforms on the innovation of financing model for Chinese financial institutions
Authors: Wang Xiaojun , Suwandej Niyom , Thongves Mooktra , Raju Valliappan
Published: October 2023

The application of e-commerce and digitization in the logistics industry has given rise to the emergence of online freight forwarding platforms that connect shippers and carriers for the efficient transportation of goods. Online transactions on the platforms generate a large amount of data, creating opportunities to gain valuable insights through data mining techniques. However, against the backdrop of the Chinese government's accelerated efforts to create a new three-dimensional dynamic logistics landscape of "Internet + Logistics," the traditional financial service models of Chinese financial institutions are struggling to meet the evolving needs of these platforms. This research and innovation project explores the impact of data mining on the operation of online freight transportation platforms and the development of innovative financing models by Chinese financial institutions. A mixed research methodology was used to collect primary data, combining quantitative analysis, qualitative questionnaire analysis, and relevant interviews to collect and analyze the data. By analyzing financial data such as transaction volumes, creditworthiness indicators, and risk factors on these platforms, various data mining algorithms are utilized to mine and predict models. Further evidence is presented to analyze the relationship between shippers, actual carriers, freight platform managers, and financial service innovations that transact through online freight platforms and to propose new types of financing service solutions that can support the growth and sustainability of the logistics industry. These financing models have the potential to increase financial inclusion, reduce credit risk, and facilitate capital flows in the freight industry.
Sustainable Investment Practices: Bibliometric Analysis on Ten Years of Observations in ESG Agencies
Authors: A García G.  Sorely , F Montes G. Luis , H Romero, Carmen , M Gutiérrez L., José , César Zapata-Molina, , A Romero, Pedro , Mariana Bravo-Sepúlveda, , Harley Guerrero-Latorre, Jorge
Published: October 2023

Objective: To analyze sustainable investments by means of a bibliometric study using the SLR technique applied to scientific research records on ESG agencies, and the indices used, over a ten-year period from 2013 to 2023. Methodology: It is a qualitative and documentary research that relies on hermeneutics for the interpretation of written texts. In addition, a bibliometric analysis was made by means of a systematic and structured review of the literature following the SLR method, applied to the scientific records of the Scopus database. Results: This study found that companies' intangible assets should be represented by stock market indices that show a responsible commitment to the environment. Therefore, governance plans should address more convincingly the priorities of socially responsible investment. Conclusions: A standardization of institutional ESG indicators is required to make the results of the measurements made on companies worldwide to demonstrate corporate sustainability more understandable and transparent and disclosed to the public. Originality: This research provides current knowledge on the factors used by ESG agencies to measure the sustainability of companies worldwide. The business world needs to be informed of these research advances, because there is a great diversity of aspects that must be considered for companies to achieve the sustainability they deserve, and a standard that facilitates a better measurement of sustainable investment indexes has not yet been established.
Environment Higth Risk Factors with drowning Among Elementary School-aged Children Before and During COVID 19
Authors: Kaeomanee Sakchai , Kedthongma Warinmad , Phakdeekul Wuttiphong
Published: October 2023

Children of school age drowning is a severe public health issue in Thailand. All school-age children should engage in appropriate drowning prevention behaviors. 16 drowning fatalities were discovered in the Mueang Sakon Nakhon area, using retrospective reports from the previous five years (2018-2022). A cross-sectional analytic study was also conducted to explore the characteristics and risk factors associated with drowning. 531 kids under the age of 15 made up the sample, according to the survey. To analyze all the data, descriptive statistics and multiple logistic regression were utilized. The results were summarized as follows: With an average age of 7 years and a smallest age of 3, the death rate for children under 15 who drowned between 2018 and 2022 was 50.0 percent in 2018. They were predominately male (68.8%), and 45.1% of them worked during the week. 68.8% in the farm's pool The incident involved 43.8% of the residents of 4, of which 43.75% were family members and 31.0% were friends. Natural water sources have certain physical features like slick ground and sloping pool margins. Furthermore, the proportion stayed at 75.0%, more factors than other types of fatalities were linked to the severity of drowning, including swimming activities, having completed primary school, and a lack of parental care, which was statistically significant at the 0.05 level.
The Effectiveness of the Influence of Digital Storybooks Based on Sasak Local Wisdom on Interpersonal Intelligence and Writing Skills
Authors: Musaddat Syaiful , Suarni Ni Ketut , Dantes Nyomen , Putrayasa Ida Bagus
Published: October 2023

This study discusses the effectiveness of the implementation of digital storybooks based on local Sasak wisdom on the interpersonal intelligence and writing skills of Fourth-grade Elementary School students in Mataram City, Indonesia. The research involved 291 students and 25 teachers in 9 elementary schools. Sample selection used cluster random sampling technique. Data was collected through observation and test methods using questionnaires and action tests. Data were analyzed using multivariate analysis techniques (Manova) and transformed into effect sizes (ES). The research results show that: (1) The effectiveness of the implementation of digital storybooks based on Sasak local wisdom on students' interpersonal intelligence is relatively high because the ES is 0.987. (2) The effectiveness of the implementation of digital storybooks based on local Sasak wisdom on writing skills is also relatively high because the ES is 0.857. (3) The effectiveness of the simultaneous implementation of digital storybooks based on Sasak's local wisdom on interpersonal intelligence and writing skills is also relatively high because the ES is 0.899. Digital storybooks based on local Sasak wisdom have high effectiveness on interpersonal intelligence and writing skills because all ES is in the high category, namely > 0.8. Referring to these results, this book is recommended for use in improving the interpersonal intelligence and writing skills of elementary school students.
Development of a Graphic Interface Application for the Vision System of the Fruit Sorting Line
Authors: Kazakevich Petr P. , Yurin Anton N.
Published: October 2023

Introduction. At present, an intuitive graphical interface is an indispensable component of modern agricultural-oriented software products.
Aim of the Article. The research is aimed at improving the efficiency of sorting apples by developing a graphical control interface for a vision system to recognize various defects and sort apples.
Materials and Methods. The authors used methods of analysis, enumeration, comparison and synthesis of modern software solutions.
Results. As a result of the research, there was created a graphical application of the software for the control unit of the machine vision system containing all the necessary tools for managing and optimizing costs when sorting apples into three commercial quality classes.
Discussion and Conclusion. The graphical interface of the machine vision system was used in the line LSP-4 for sorting and packing apples. It was developed by Scientific and Practical Center NAS of Belarus for Agricultural Mechanization in 2020 and successfully passed state acceptance tests.
Investigating the Influence of the Belt IR Dryer Regime Parameters on Kinetics of Carrot Drying Process
Authors: Gavrilov Alexander V. , Gerber Yuriy B.
Published: October 2023

Introduction. In the process of convective drying, there is a contradiction between drying speed and energy efficiency. One of the solutions to this contradiction is the use of targeted energy supply to the product. The method of targeted energy supply is the use of electromagnetic radiation in the drying process.
Aim of the Article. The study was aimed at obtaining the coefficients of a logarithmic model for calculating the performance of a belt IR dryer for drying carrots.
Materials and Methods. There were studied a modular belt IR dryer with the ability to control the speed of the belt and the power of the emitters. To describe the process, there were used standard models of the dependence of relative water content on drying time.
Results. An analysis of the drying rate curves showed an extreme effect of the belt speed on the drying rate. At belt speeds above 10 mm/s, an increase in belt speed leads to an increase in the duration of the drying process. To describe the kinetics of the drying process at IR powers of 170, 300, and 450 W, there was used a logarithmic model, as it most adequately describes the experimental data.
Discussion and Conclusion. For this type of dryers it is recommended to use the belt speed of about 10 mm/sec. The obtained coefficients of the logarithmic model are used to calculate the capacity of the drying unit.
Results of Photobiological Studies on Growing Lettuce under Multispectral Radiation Sources
Authors: Dolgikh Pavel P. , Trepuz Sergey V. , Khanipova Vera A. , Senkevich Olesya V.
Published: October 2023

Introduction. When growing plantations through using vertical farm technology, an important factor for regulating energy processes is electromagnetic radiation of irradiators with certain optical wavelengths.
Aim of the Article. The aim of the study was to substantiate the technology of application of LED radiation for growing green crops in vegetation facilities under conditions of multispectral radiation by determining the patterns of changes in the qualitative indicators of lettuce varieties Cook, Chrysolite and Afitsion and to create the concept of LED irradiators for controllable crop production.
Materials and Methods. The experiment was conducted in the vegetation facility, in three chambers of which different radiation (in spectrum) of biological objects (green plants) was created using irradiators of different spectrum, other things being equal.
Results. Experimental studies have determined a range of diverse reactions to radiation of a certain spectral composition. Stable increase in the content of threonine, phenylalanine, valine, serine, alanine and sugars was found in lettuce variety Cook grown under the irradiator with adjustable spectrum. At the same time, a stable decrease in the content of these substances was observed in lettuce variety Chrysolite grown under the irradiator with controlled spectrum. For vitamin C content, the reaction was the opposite: a decrease in vitamin C content in lettuce variety Cook and an increase in vitamin C content in lettuce variety Chrysolite grown in a spectrum-controlled irradiator. For lettuce variety Afitsion, the response to the content of the test substances was dissimilar in both experiments.
Discussion and Conclusion. The development and application of LED irradiators with fine turning for controlled crop production should be based on photobiological studies, taking into account specific responses of plantation varieties. For these purposes, there is proposed a technical solution with a set of LEDs controlled by individual channels using digital technologies.
Efficient and sensitive quantification of polar tobacco volatile organic compounds by a micro thermal-assisted sampling device using reduced graphene oxide coupling with thermal desorption-gas chromatography/mass spectrometry
Authors: Lai Yanhua , Han Bing , Wu Jiahui , Weng Shouhui , Chen Senlin , Wang Junxia , Wang Yu , Pan Xiaowei , Lin Yun , Tao Hong , Zhang Zhuomin , Li Gongke
Published: October 2023

It still remains a great challenge to selectively enrich and sensitively quantify the trace volatile organic compounds (VOCs) in real samples with complex matrix. In this study, an integration method combining a selective enrichment medium of reduced graphene oxide (rGO) with a specially designed micro thermal-assisted purge-and-trap sampling device was developed for efficient enrichment and sensitive quantification of trace tobacco VOCs coupling with thermal desorption (TD)-gas chromatography/mass spectrometry (GC/MS). The prepared rGO has been proved to possess excellent enrichment selectivity and capacity for tobacco polar VOCs with the multi-layer structure, good thermal stability and large specific surface area. The specially designed sampling device was efficient and suitable for enriching and sampling trace polar tobacco VOCs coupling with rGO medium. Under the optimized sampling and analytical conditions, the established analytical method could be actually applied for quantification of typical tobacco polar VOCs with the good recoveries of 72.9–128% and the satisfied RSDs of 1.8–19.9% (n = 3). The results suggested that the developed method was selective, sensitive and reliable for enrichment and quantification of trace tobacco polar VOCs.
Numerical study of heat transfer in circular pipe filled with porous medium
Authors: Qader Firas F. , Mohamad Barhm , Hussein Adnan M. , Danook Suad H.
Published: October 2023

Forced convection heat transfer was studied in a horizontally heated circular pipe with constant heat flux. Porous medium was created using 1 and 3 mm stainless-steel balls (porosity: 0.3690 and 0.3912). Reynolds numbers ranged from 3,200 to 6,500 based on pipe diameter, with heat flux rates of 6,250 and 12,500 W m−2. ANSYS Fluent simulated a 51.4 mm diameter, 5 mm thick, 304 mm long stainless-steel pipe. Results showed increased turbulence and eddy formation. Analysis revealed higher convective heat transfer coefficient, pressure drop, and Nusselt number with increasing Reynolds number. Nusselt number also increased with 1–3 mm ball diameter. 6% porosity increase reduced pressure drop by 84.4%. Nusselt number rose by 46.7% (Reynolds 3,200–6,500) and 4.36% (heat flux 6,250–12,500 W m−2).
Michel Foucault: René Descartes y el cuerpo como máquina en la tesis del poder disciplinario
Authors: Frau-Buron Pablo
Published: October 2023

El objetivo de este estudio es interpretar la relación entre el modelo anatómico de Descartes y el régimen disciplinario que M. Foucault propone en su tesis sobre el poder en la Modernidad. Se muestra cómo Foucault sitúa a Descartes como el iniciador de una medicina que convertiría el cuerpo humano en una máquina y al igual que esta, pasaría a concebirse como un sistema mecánico susceptible de ser explorable, controlable y manipulable.
Libertad y ciencia en Descartes
Authors: Jiménez-Villar Beltrán
Published: October 2023

La libertad en Descartes tiene dos momentos diferentes: antes de que se descubra la posibilidad de la verdad y después de su descubrimiento. La experiencia de la libertad previa al establecimiento de las condiciones de la verdad tiene lugar en la decisión de reconstruir el edificio del conocimiento. El descubrimiento de su fundamento teológico tiene como consecuencia la moralización del saber.
Sustancia, razón, libertad y pasión en Descartes: lecturas desde la modernidad temprana a la postmodernidad
Authors: Lázaro-Cantero Raquel , Llinàs-Begon Joan-Lluís , Sanfélix Vicente
Published: October 2023

Los textos que se presentan a continuación aúnan a reconocidos estudiosos en el cartesianismo, junto a investigadores más nóveles. Son fruto además de un proyecto de investigación financiado por el Ministerio de Ciencia e Innovación, [Referencia PID2021-126133NB-100] que lleva por título: Éticas y metafísica de los afectos. Las génesis modernas del presente actual (EMAP). Se ofrecen, por tanto, los estudios que siguen como resultados de este proyecto, que inició su andadura en septiembre de 2022.
ZnO nanoparticles impregnated with Hibiscus sabdariffa L. extract: Characterization and antimicrobial activity
Authors: Razura-Carmona F.F. , Altamirano-Medina T.P. , Bueno-Durán A.Y. , Sáyago-Ayerdi S.G. , Girón-Pérez M.I. , P.U. Bautista-Rosales , Pérez-Larios A. , Sánchez-Burgos J.A. , Sánchez Burgos Jorge Alberto
Published: October 2023

Zinc oxide can be a vehicle for the encapsulation of bioactive compounds obtained from Hibiscus sabdariffa L by-products due to its mesoporous structure. The nanoparticles obtained with zinc nitrate showed an average particle size of 120 mn, when impregnated with ultrasound-assisted extract of Jamaican by-product did not show morphological alterations, however; it was observed that there is a modification of the ZnO energy bands attributed to the interactions between ZnO and the extract molecules. T1.0% and T1.5% presented higher inhibition on Listeria Monocytogenes, Staphylococcus aureus, Escherichia coli and Staphylococcus mutans compared to T0.5% and EUSJ. The results show that the synthesis process and the impregnation of Jamaican by-product extracts have interesting antibacterial properties associated with the potentiating effect of ZnO and extract, which can be a starting point for further studies on some applications or other types of microorganisms
EXPLORING ENHANCED SOLAR POND CONFIGURATIONS FOR LOW-GRADE THERMAL ENERGY STORAGE: A COMPARATIVE STUDY
Authors: Jayakumar Vinoth Kumar , Arunachalam Amarkarthik
Published: October 2023

This study revolves around the salt gradient solar pond (SGSP) as an environmentally conscious approach for
efficiently storing heat. This investigation assesses the impact of adding a coal cinder (CC) additive and integrating
an East–West reflector (EWR) on enhancing the energy efficiency of the salt gradient trapezoidal solar pond (SGTSP).
The research involves designing, fabricating, and analyzing SGTSP systems with EWR and CC, comparing them with
standard SGTSP systems in terms of energy performance. The results indicate a substantial 43.4% rise in average
solar intensity when employing the EWR, and incorporating the coal cinder additive elevates the lower convection
zone's (LCZ) temperature by 24.5%. In comparison to the conventional SGTSP (SGTSP-C), the SGTSP with the
East–West reflector (SGTSP-EWR) and SGTSP with the coal cinder (SGTSP-CC) attain temperatures of 60.75°C and
66.87°C, respectively, representing an increase of 15.49% and 27.12%. Similarly, the maximum energy efficiency of LCZ for SGTSP-EWR and SGTSP-CC were 27.15% and 55.92% higher than the values of SGTSP-C. Ultimately, this research showcases the thermal energy storage potential of SGTSP and provides practical approaches to improve its energy efficiency.
Femoral Shaft Fracture Developed Late-Onset Infection in 27 Years after Intramedullary Nailing: A Case Report
Authors: Kasai Yuichi , Okabayashi Ryo , Aoki Kentaro
Published: October 2023

Postoperative late-onset infections more than 1 year after intramedullary nail surgery for femoral shaft fractures are very rare. We show an extremely rare case of developed late-onset infection 27 years after surgery, report on risk factors for late-onset infection, and infer why the infection occurred.
Investigating the Role of Bias Correction Methods and Climate Models on Water Budget of Büyük Menderes Basin
Authors: ERKOL Zülküf İbrahim , DALOGLU ÇETİNKAYA İrem
Published: October 2023

Büyük Menderes Basin is one of the largest basins in Turkey, with almost half of the basin area utilized for agricultural purposes. The amount of water allocated to the agricultural areas in the basin corresponds to 80% of water use in the watershed. Hence, the impact of climate change on the water supply in the Büyük Menderes Basin will be significant for the basin. In this study, we model the effects of climate change on the water budget (water supply and demand balance) of the Büyük Menderes Basin using the Water and Evaluation and Planning (WEAP) tool. Future precipitation, temperature, and evaporation data for the basin are attained from outputs of the HadGEM2-ES global circulation model (GCM), along with CNRM-CM5.1 and GFDL-ESM2M regional circulation models (RCM) for RCP 4.5 and RCP 8.5 scenarios. Subsequently, the study applies different statistical bias correction methods (Linear Scaling (LS), Distribution Mapping (DM), Local Precipitation Scaling (PLIS), and Power Transformation of Precipitation (PTP) for raw outputs of GCMs and RCMs and analyzes the changes in outcomes of projected climate data and the impact of changes on the hydrology of the basin using the WEAP model. For this analysis, calibrated and validated WEAP model for the 12 reservoirs of Büyük Menderes Basin is used to understand the impact of different bias correction methods on reservoir levels.
One-step and Cost-effective Conversion of Polyimide to Graphene by Utilizing a Desktop Laser
Authors: AYDEMİR Nihan
Published: October 2023

Herein a one-step, cost-effective, chemical-free, and versatile graphene fabrication by employing a CO2 laser is presented. A cost-effective desktop laser, compared to expensive and bulky lasers reported in the literature, is utilized for the conversion of polyimide films to graphene. Optimization of the fabrication is enabled by the examination of laser parameters such as laser power and scanning speed. Also, various 2D pattern drawings and in-situ fabrication were realized by the Laser Draw software. Furthermore, characterization experiments such as Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), Raman Spectroscopy, and X-Ray Photon Spectroscopy (XPS) were performed to prove the successive graphene fabrication.
Mulatu Numbers Which Are Concatenation of Two Fibonacci Numbers
Authors: ERDUVAN Fatih , GÜNEY DUMAN Merve
Published: October 2023

Let (M_k) be the sequence of Mulatu numbers defined by M_0=4, M_1=1, M_k=M_(k-1)+M_(k-2) and (F_k) be the Fibonacci sequence given by the recurrence F_k=F_(k-1)+F_(k-2) with the initial conditions F_0=0, F_1=1 for k≥2. In this paper, we showed that all Mulatu numbers, that are concatenations of two Fibonacci numbers are 11,28. That is, we solved the equation M_k=〖10〗^d F_m+F_n, where d indicates the number of digits of F_n. We found the solutions of this equation as (k,m,n,d)∈{(4,2,2,1),(6,3,6,1)}. Moreover the solutions of this equation displayed as M_4=(F_2 F_2 ) ̅=11 and M_6=(F_3 F_6 ) ̅=28. Here the main tools are linear forms in logarithms and Baker Davenport basis reduction method.
Fractal Approach to Dielectric Properties of Single Walled Carbon Nanotubes Reinforced Polymer Composites
Authors: ILGAZ Aykut , BAYIRLI Mehmet
Published: October 2023

In this paper, the internal structure and dielectric properties of unsaturated polyester resin-based neat and single-walled carbon nanotube reinforced composites were comprehensively evaluated with the fractal analysis using the Fast Fourier Transform (FFT). The greyscale images, bitmap (BMP) images and 3D tomographic images were obtained by converting the scanning electron microscope images of the materials. It was observed that the distributions of components in the resin for both materials are irregular and their surfaces exhibit anisotropic behaviors. The surface coating rate (SCR) and fractal dimensionality (FD) of the materials were also calculated using the power spectrum. It has been observed that the fractal dimensionality of the composites can be changed by the doping process and the fractalization of the nanotube doped sample increases compared to the pure material due to nanotube agglomeration, spatial distribution and the orientation. The increase in fractalization as a result of this agglomeration and orientation in carbon nanotubes explains the high dielectric constant values observed at low frequencies by increasing the number and size of carbon nanotubes clusters that act as micro capacitors in certain regions of the matrix. It has been reported that the calculations for the surface coverage ratios for both samples also support these results.
Phytochemical Components, Antioxidant, Antibacterial, and Synergistic Effects of Endemic Sideritis trojana Extract in Combination with Antibiotics on Human Pathogens
Authors: ALTUN Mehzat
Published: October 2023

In recent years, dramatically rising multidrug-resistant bacteria (MDR) and side effects of antibiotics lead ethnopharmacology to discover novel antimicrobials derived from plants for bacterial infections. Traditionally, decoction or infusion of the species of Sideritis has been used for the treatment of diseases such as cough, stomach, gastrointestinal, and kidney disorders. In this study, we aimed to investigate the antioxidant and antibacterial activity of the ethanolic extract of Sideritis trojana (S.trojana) and its synergistic potential with antibiotics against human pathogens. Gas chromatography-mass spectrometry (GC-MS), Folin- Ciocalteu, 1-diphenyl-2-picrylhydrazyl radical (DPPH), disc diffusion, and minimum inhibitory concentration (MIC) assays were used for identifying phytochemicals, total phenolic content (TPC), antioxidant, and antibacterial activity of ethanolic extract of S.trojana alone and binary combination with selected antibiotics against Gram-positive and Gram-negative bacterial strains, respectively. Furthermore, the combined effects of the extract with classical antibiotics were evaluated by measuring the inhibition zone diameter (IZD). The S.trojana extract showed moderate antibacterial activity with the MIC ranging between 15.625 to 500 µg/mL against human pathogens and the synergistic effect was detected in a dual combination of extract and antibiotics. The extract exhibited high antioxidant activity with a low IC50 value (0.138±0.010 mg/mL). The TPC value was 47.95±0.24 (mg GAE/g extract). After measurements of cytotoxicity were performed, S.trojana can be used alone or combined with antibiotics as an alternative therapy to eliminate pathogens and can be preferred as an antioxidant agent in the pharmaceutical industry.
Investigation of the Usage Properties of Steel Slag as Pigment in Low-Temperature Glaze
Authors: KOÇ Muhterem , TAŞÇI Eda
Published: October 2023

The evaluation of industrial wastes in the ceramics industry has been the subject of research studies in recent years. This study investigated the use of steel slag as a colouring pigment in ceramic glazes. The colour effects of 45 compositions created with a triple-phase diagram with steel slag, CoO, and Cr2O3 on low-temperature glaze composition were determined. The microstructural evaluation of the selected colours by SEM and EDX analysis were carried out.The prepared glaze compositions were applied by pouring on the high silica ceramic body. Glazed tiles were sintered in a muffle furnace at 950 ℃ and then L*a*b colour and gloss brightness values were measured. By using steel slags instead of Fe2O3, black glazes were obtained in the triple diagram.
Topology Optimization of Spinal Cage Designs for Improved Stress Distribution and Bone Graft Window
Authors: ERYILDIZ Meltem
Published: October 2023

Interbody fusion is utilized as a treatment for spinal degenerative diseases. Spinal cages, also known as intervertebral cages or interbody fusion devices, are implants employed in spinal surgery to address these conditions and promote spinal stability. These cages are inserted into the intervertebral space between adjacent vertebrae, replacing the damaged or degenerated disc. Spinal cages aid in the distribution of loads and stress at the fusion site and often incorporate a dedicated area for bone graft material. In this study, a topology optimization approach was employed to develop distinct spinal cages featuring a bone graft window. The mechanical behavior of the spinal cages under loading conditions was simulated and evaluated using finite element analysis. Following optimization, a finite element model analysis estimated the maximum stresses and compared them to the initial model. For topology optimization, reductions of 30%, 50%, and 70% in mass were defined. Both the 50% and 70% mass-reduced designs, featuring an open window, are deemed suitable for bone graft placement and stress distribution.
Space From Perspective of National Security
Authors: OZYILDIRIM Alime
Published: October 2023

Space is significant asset for prosperity and security of countries. Space brings noteworthy benefits in various areas from environment and weather monitoring, agriculture, to communications, navigation, science and exploration. Demands for space technology is increasing all over the world since particularly security issues are becoming even more prominent. Contrast to past, security issues are dramatically changed today since there are unorganised or organised, uncertain, unpredictable perpetrators that are threats to national securities. In addition to man-made threats, the effects of natural hazards such as climate change are felt more and countries have started experiencing unexpected and strange impacts. Many countries and organisations have been using satellite technologies effectively to cope threats to national securities for a while. Today it becomes apparent that investments in space technology and capability development will dramatically increase for the future prosperity of the nations. In this paper, benefits brought by satellite technologies are being articulated from the perspective of national security. In addition, emerging technologies that will become more prominent in space field for national security are also being introduced.
Aluminum and Carbon Fiber Reinforced Polymer Composite Material Comparative Strength Analysis of a Structural Part in F-16 Fighter Aircraft Landing Gear
Authors: KAYA İlteriş , ÇEVİK Mehmet
Published: October 2023

In this study, the geometric structure, weight and boundary conditions of the aluminum alloy main landing gear FS 34.180 structural part currently used in F-16 fighter aircraft are determined. Finite element (FE) analysis is performed considering the forces that the existing part is exposed to in four different scenarios with Ansys Workbench software. Then, a FE model of the same part is created from carbon fiber reinforced polymer (CFRP) composite material. The loading conditions applied in the four scenario are also applied to the new CFRP composite material model. Equivalent stress, equivalent total strain, maximum shear stress and total deformation values in the models created with both materials are calculated.

The results obtained for both materials are compared. As a result of the comparison, it is observed that there is a decrease of approximately 0.8% in the equivalent stress, 12% in the equivalent total strain, 0.7% in the maximum shear stress and 11.8% in the total deformation values for the same loading and boundary conditions. In addition, the total mass of the part is reduced from 31.17 kg to 20.77 kg, which corresponds to a reduction of 33.37%.

This development is expected to reduce the weight of the aircraft as well as extend the fatigue life and maintenance period.
INFLUENCE OF TEMPERING TEMPERATURE ON THE MICROSTRUCTURE AND ULTIMATE TENSILE STRENGTH OF 28Cr3SiNiMoWV STEEL
Authors: Nguyen Ngoc Minh , Vu Hanh Ngan
Published: October 2023

In this research, the influences of the tempering temperature on the microstructure and ultimate tensile strength of 28Cr3SiNiMoWV steel were studied. The microstructure and ultimate tensile strength were investigated after tempering 28Cr3SiNiMoWV steel at different temperatures, ranging from 280 °C to 440 °C for 2 h. The results show that after tempering it at different temperatures, the microstructure of 28Cr3SiNiMoWV steel was tempered martensite. During the tempering process, the alloy carbides precipitated in the martensite matrix. Precipitation of alloy carbides in the microstructures of different specimens is the cause for an increase in the ultimate tensile strength. With the increasing tempering temperature, the ultimate tensile strength initially increases from 1390 MPa to 1601 MPa, and then decreases to 1466 MPa, with its maximum value at 280 °C.
EFFECT OF DIFFERENT APPLICATION PRESSURES ON ROTARY-FRICTION-WELDED AA2024-T6 JOINTS
Authors: Apay Serkan , Özen Fatih , Onar Volkan
Published: October 2023

An AA2024-T6 aluminium alloy was welded with a rotary-friction-welding technique using different forging pressures under constant friction pressure. It was found out that the increasing forging pressure has an adverse effect on the tensile strength of the welded joint. The maximum tensile strength was 366.22 MPa for a forging pressure of 80 MPa. However, the failure energies and elongations were decreased as the forging pressure increased. The minimum elongation was 15.45 %, while the minimum failure energy was 4.35 J with a forging pressure of 120 MPa. This situation is attributed to the loss of ductility up to a degree in high forging pressures and temperatures induced in the HAZ. In microstructural examinations the existence of the S phase has dominant role in determining the local hardness. The S phase is affected by the welding heat in the heat-affected zone, the thermomechanically affected zone and the dynamically recrystallized zone. The hardness is increased up to the middle of the TMAZ. In this zone the heat input caused an aging effect and increased the dispersed S phase in the intergranular zones. The aging mainly governed by the heat input increased the hardness up to beginning of the recrystallization zone.
EFFECT OF A MAGNETIC FIELD ON THE MICROSTRUCTURE AND PROPERTIES OF A 22MnB5-CP780 WELDED JOINT
Authors: Zhu Xiaoou , Liu Zhanqi , Li Nan
Published: October 2023

A steady-state magnetic field-assisted laser welding test of 1-mm-thick automotive 22MnB5 and CP780 high-strength steel plates was carried out using a low-power fiber laser. The effects of different magnetic induction intensities on the microstructure and mechanical properties of welded joints were investigated under a heat input of 150 J/mm. When no magnetic field was applied, there was splashing on the welded joint surface, the width was wide and the main solid-state phase transitions in the weld center included ferrite transformation and bainite transformation. The application of a magnetic field resulted in an acceleration of the cooling rate of the molten pool due to the thermoelectric magnetic force. This, in turn, led to the predominance of the bainite transformation and martensite transformation as the primary solid-state phase transitions in the weld center. In a range of 5–25 mT, the welded joints were narrow, symmetrical, well-formed and free of defects such as splashing. The experiment proved that as the magnetic induction intensity increased, the laser energy became more concentrated. This led to an increase in the average hardness at the center of the weld, a gradual reduction of the softening in the heat-affected zone and an increase in both the yield strength and elongation of the welded joint. The optimal comprehensive mechanical properties of the welded joints were observed when B = 25 mT.
STUDY OF THE PROPERTIES AND INTERFACIAL ENERGY OF GRAPHENE-MODIFIED ASPHALT BASED ON MOLECULAR DYNAMICS
Authors: Mo Zhenlong
Published: October 2023

In this paper, a molecular dynamics simulation was used to examine the physical, mechanical, and interfacial adhesion characteristics of graphene-modified asphalt. The results show that the physical properties, mechanical properties and interfacial adhesion work of modified graphene are higher than those of the base asphalt model, indicating that the addition of graphene can improve the mechanical properties and interfacial interaction of asphalt. Asphalt and aggregate mainly interact through physical adsorption, and the Van der Waals force plays an important role in the adhesion behavior of the asphalt-calcite interface. There is an optimal value for the content of graphene, such that the content of graphene added to the asphalt should not be too high. Considering the graphene price factor and modification effect, the graphene content studied is optimal at 1.79 w/%.
HEMOCOMPATIBILITY STUDIES OF LAYER-BY-LAYER POLYELECTROLYTE COMPLEXES FOR BIO-BASED POLYMERS
Authors: Moyo Mthabisi Talent George , Adali Terin , Edebal Oğuz Han , Bayir Ece , Şendemir Aylin
Published: October 2023

Thrombogenesis is an important issue that causes blood-contacting biomedical device failure. This study focuses on hemocompatibility studies of novel blood-contacting polyelectrolyte complexes (PECs) for biomedical application designs. PEC films were fabricated from biobased polymers of silk fibroin (SF), chitosan (CH), and sodium alginate (AL) through the solvent casting method as well as Layer-by-Layer (LbL) technique. Characterization was carried out by Fourier-transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Atomic force microscopy (AFM), and Differential scanning calorimetry (DSC) analyses. FTIR spectra displayed all layers’ characteristic peaks of SF, CH, and AL. AFM images indicated that the addition of AL as an outer layer increased surface roughness. DSC analysis suggested that the best thermal stability has been observed with the CH outer layer of PECs. SEM micrograph analysis indicated that the morphologies of PECs were affected by the inclusion of the clopidogrel bisulfate (CLB). Hemocompatibility properties were investigated by complete blood count (CBC), prothrombin time (PT), international normalized ratio (INR), activated partial thromboplastin time (APTT), platelet adhesion, erythrocyte morphology analysis, in vitro cholesterol, and albumin level tests. These hemocompatibility analyses demonstrated that the PEC surfaces provide favourable principles to design and develop non-thrombogenic PECs for blood-contacting biomedical applications