bluuebunny/crossref_metadata_2025 huggingface dataset:
Trends in Out-of-School Youth Research: Focusing on keyword network analysis
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Lee Young-ok , Jung Hae-mi , Kim Su-been , Park Yun-mi
Published: February 2025

Objectives The purpose of this study is to explore research directions for supporting out-of-school youth by examining domestic research trends on the topic of ‘out-of-school youth’ through keyword network analysis.
Methods To this end, we searched for studies on ‘out-of-school youth’ published in academic journals registered with the National Research Foundation of Korea from 2004 to 2024. Jun., selected a total of 300 papers as analysis subjects, and conducted frequency analysis and keyword network analysis centered on keywords presented in the papers.
Results First, research on ‘out-of-school youth’ began with the first article in 2007, and has steadily increased since the enactment of the Act on Support for Out-of-School Youth in 2014, and has rapidly increased since 2020. Second, in terms of keyword appearance frequency, ‘career’ was the most important keyword, followed by ‘addiction’, ‘juvenile delinquency’, ‘social stigma’, and ‘alternative education’. Third, as a result of centrality analysis, keywords with high degree of connection centrality were identified as ‘career’, ‘parent-child relationship’, ‘self-esteem’, ‘social stigma’, ‘social support’, ‘depression’, ‘emotional regulation’, ‘parental parenting attitude’, ‘juvenile delinquency’, and ‘program’.
Conclusions This study systematically understands the trends of out-of-school youth research through keyword network analysis, and suggests future research directions and policy implications. This will ultimately contribute to creating an inclusive and supportive environment for out-of-school youth.
Development of an Adaptive Learning Model Based on an LMS for TOPIK I Preparation Among Francophone Learners: A Practical Case Study with Students from the University of Le Havre in France
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Kang Miran
Published: February 2025

Objectives The purposes of this study were to develop and propose an adaptive learning model and LMS-based content for the preparation of TOPIK I, tailored to students learning Korean at the University of Le Havre in France.
Methods To achieve this, a systematic analysis was conducted to identify the difficulties and learning needs of students accustomed to learning and evaluation based on the action-oriented approach. This was carried out through mock exams and surveys. In addition, the functionalities of the LMS employed by the University of Le Havre and the applicability of adaptive learning methods were explored.
Results As a result, learner-centered, personalized learning resources and interactive content were designed using the various functionalities of the University of Le Havre’s LMS, Eureka, particularly leveraging the h5p tool.
Conclusions This learning model enables students to manage their own learning pace while selecting and adapting their preferred learning pathways. By providing an autonomous learning environment, this approach aims to address the various challenges faced by French-speaking learners when preparing for TOPIK I through adaptive learning strategies.
Exploring University Students' Social Interdependence and Interdisciplinary Understanding within the Context of Interdisciplinary Education
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Yoon Heojeong , Bang Dami
Published: February 2025

Objectives This study aimed to explore the social interdependence and interdisciplinary understanding of university students in the context of interdisciplinary education.
Methods To this end, a survey was conducted with 85 students attending an interdisciplinary liberal arts course at a university in the metropolitan area. The study analyzed social interdependence in the contexts of single-disciplinary and interdisciplinary courses and examined differences across sub-categories. Additionally, the performance and importance of interdisciplinary understanding were identified, and educational needs were calculated by category and item.
Results The study results showed no significant differences in students' social interdependence between single-disciplinary and interdisciplinary course contexts. In both contexts, the outcome category scored higher than the means category. Students perceived the importance of all categories of interdisciplinary understanding to be higher than their performance. Among the average values for performance and importance, the reflection and communication categories were higher than collaboration. The ranking of educational needs, calculated based on the gap between performance and importance, was as follows: reflection, communication, knowledge of interdisciplinary paradigms, Knowledge of interdisciplinarity, and collaboration. Among the top 10 items in educational needs rankings, three belonged to the reflection category, two to communication, three to knowledge of interdisciplinary paradigms, and two to Knowledge of interdisciplinarity, with no high-ranking items appearing in the collaboration category.
Conclusions Based on the results, educational implications for the design and implementation of interdisciplinary education reflecting the aspects of social interdependence and the educational needs for interdisciplinary understanding were discussed.
A Study on the Impact of Parenting Stress on the Quality of Life of ADHD Children’s mother: Focusing on the Mediating effect of Parental Efficacy and Resilience
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Park So-Young
Published: February 2025

Objectives This study examined the impact of parenting stress experienced by mothers of ADHD children on their quality of life and verified how resilience and parental efficacy mediate this effect.
Methods To this end, data were collected from mothers of children living in the metropolitan area who were receiving treatment for ADHD symptoms between the ages of 5 and 12. Reliability analysis, frequency analysis, and correlation analysis were performed using SPSS 26.0, and the mediating effect was verified using Process Macro Model 6.
Results The analysis results showed that the direct effect of parenting stress on quality of life had a significant negative effect. Among the mediating paths, the paths through resilience and parental efficacy each had a significant negative effect. However, among the mediating paths, the double mediation that sequentially mediated resilience and parental efficacy was not significant.
Conclusions This study aimed to understand the psychological characteristics of mothers of ADHD children, seek appropriate psychological interventions to relieve parenting stress, and propose on-site measures to provide effective counseling to improve the quality of life of mothers of ADHD children.
Development of a Career Exploration Program for VR Designer, a Promising Future Career
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Park Su-Jin
Published: February 2025

Objectives The purpose of this study is to develop a career experience program that allows elementary school students to explore the emerging profession of VR designers and to evaluate and improve the program based on student satisfaction.
Methods Using the ADDIE model, a systematic VR Designer Career Experience Program was developed for 3rd and 4th-grade elementary school students. The program was implemented with a total of 66 students (26 from grade 3 and 40 from grade 4) at D Elementary School. It was conducted over four 40-minute sessions. After the program, a survey was developed to analyze various factors, including interest in the content, understanding of the learning material, appropriateness of class pacing, student needs, satisfaction, and feedback or opinions.
Results The VR Designer Career Experience Program effectively enabled students to understand virtual reality technology, design various environments using VR, and experience the basic roles and tasks of a VR designer. The program provided students with hands-on experience in VR content creation, enhancing their understanding of digital technologies and fostering their interest in career exploration.he program was applied to 66 students (four classes) from D Elementary School under the G Metropolitan Office of Education, including 26 third graders and 40 fourth graders. A satisfaction survey measured program-related variables. Students demonstrated high interest and satisfaction, with fourth graders showing greater engagement and a notable demand for more in-depth learning experiences.
Conclusions Through the program, students learned the principles and applications of VR/AR technology and experienced designing and creating VR content on the theme of marine ecosystems using the CoSpaces platform. Students demonstrated high levels of interest and understanding, with consistent satisfaction across participants. They also expressed a desire to explore advanced technology fields such as VR and AI, with some requesting extended and more in-depth learning opportunities.
A Study on the Process of Changes in Independent Living Skills of Adults with Developmental Disabilities through a Digital Literacy Skills Enhancement Program
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Ok Hye-Sook , Kang Young-Sim
Published: February 2025

Objectives The purpose of this study is to examine the process of changes in independent living abilities of adults with developmental disabilities through a digital literacy skills enhancement program. This study developed a tailored digital literacy program for adults with developmental disabilities to enable them to actively manage their health, household tasks, career exploration, and leisure activities. The program was designed to enhance independent living abilities by teaching and applying practical digital skills.
Methods The research was conducted using a qualitative methodology. The program consisted of 16 sessions, designed to integrate the independent living components—health, household tasks, career, and leisure—with the digital literacy elements of knowledge, behavior, and attitude. A total of six adults with developmental disabilities participated in the study. Data were collected through pre- and post-interviews, program activity records, assistant instructors’ journals, the researcher’s reflective journal, and video recordings.
Results The findings indicate that participants learned to use various digital tools to document and manage their health, household tasks, career preparation, and leisure activities. Participants reported positive changes, including enhanced capabilities for independent living and increased self-confidence through the use of digital technology.
Conclusions These results underscore the necessity and significance of digital literacy education in supporting the independent living of adults with developmental disabilities, providing valuable insights for the development of future programs.
Application of the demand-control-support model to academic burnout: Exploring protective factors for academic burnout
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Kim Boyoung , Kim Kyung Hee
Published: February 2025

Objectives This study applied the demand-control-support model, which is a major model explaining job burnout, to the phenomenon of academic burnout of college students in order to explore the protection factors of academic burnout of college students.
Methods After measuring academic exhaustion, academic demand, academic control, parental autonomy support, and professor autonomy support for 377 students enrolled in universities in the metropolitan area, a hierarchical regression analysis was conducted based on the theoretical model, the demand-control-support model.
Results As a result, academic control reported a significant effect on reducing academic burnout while controlling the effect of academic demand in academic burnout. As a result of examining the effects of parental autonomy support and professor autonomy support in the next step, both parents and teachers reported significant negative effects, and when comparing relative sizes, professor autonomy support had a greater effect on reducing college students' academic burnout.
Conclusions Based on these results, the significance and limitations of this study and suggestions for subsequent studies were also discussed.
The mediating effect of self-regulated learning ability in the influence of a mother's overprotective parenting attitude on an infant's social competence
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Kim Jong Mi , Pu Sung Sook
Published: February 2025

Objectives The purpose of this study is to investigate the mediating effect of self-regulated learning ability on the influence of mothers' overprotective parenting attitude on children's social competence.
Methods This study used data from a survey of 308 children and mothers from early childhood education institutions in the Gyeonggi Province. Frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, and rarefaction analysis were performed using the SPSS18 program. In addition, a three-step mediation effect analysis suggested by Baron & Kenny (1986) was conducted to verify the research model, and a Sobel test was performed to confirm the significance of the mediation effect.
Results As a result of this study, first, it was found that infringement among mothers' overprotective parenting attitudes had a significant negative correlation with infants' overall self-regulated learning ability and social competence. In other words, the more the mother infringes, the lower the infant's self-regulated learning ability and social competence. Second, as a result of analyzing the mediating effect of self-regulated learning ability in the process of the mother's overprotective parenting attitude affecting children's social competence, it was found that infringement of overprotective parenting attitude negatively affected children's self-regulated learning ability and social competence, and in this process, it was found that self-regulated learning ability had a mediating effect.
Conclusions Through this study, it was confirmed that the infringement of the mother's overprotective parenting attitude negatively affects children's social competence, but self-regulated learning ability plays a mediating role and acts as a variable to increase social competence. These results suggest that in order to increase the social competence of infants, efforts are needed to avoid mothers' overprotective parenting attitude and enhance self-regulated learning abilities.
The Effects of Visiting Healthcare Education for Preventing Pressure Ulcer based on the Metaverse Platform for Nursing Students: Using Leap Motion and Haptic Devices
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Ha Yeongmi , Jung Mira
Published: February 2025

Objectives The purpose of this study was to examine the effects of a visiting healthcare education for preventing pressure ulcer based on the Metaverse platform using leap motion and haptic devices on nursing students’ clinical reasoning competency, nursing profession self-efficacy, and clinical performance.
Methods A single group before- and after- experimental design was used. A total of 68 senior nursing students were recruited from one college in Y city. The visiting healthcare education for preventing pressure ulcer based on the Metaverse platform using leap motion and haptic devices was conducted five times a week for two weeks, 60 minutes per session, for a total of 10 sessions.
Results There were significantly improved in experimental group in the clinical reasoning competency(t=-9.72, p<.001), nursing profession self-efficacy(t=-8.12, p<.001), and clinical performance(t=-9.39, p<.001) after a visiting healthcare education for preventing pressure ulcer based on the Metaverse platform using leap motion and haptic devices.
Conclusions The significance of this study is that the visiting healthcare education for preventing pressure ulcer based on the Metaverse platform using leap motion and haptic devices would be effective in a real community practice settings. This visiting healthcare education may be a useful educational method for nursing students, and there is continuous efforts for applying this educational program in nursing school settings.
Fear of negative evaluation, Self-disclosure, and Perceived supervisor authenticity on Supervision satisfaction
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Cho YoungHee
Published: February 2025

Objectives The present study explored the effects of fear of negative evaluation, self-disclosure, and perceived supervisory authenticity on supervision satisfaction and the associations between each variable.
Methods An online survey of 261 supervisees who received at least three supervision visits from the same supervisor was administered to 261 supervisees, which included measures of fear of negative evaluation, supervisee self-disclosure, perceived supervisor authenticity, supervision satisfaction, and demographic questions. Descriptive statistics, correlational analyses, and mediating effects were conducted using SPSS 26.0 and AMOS 28.0, and indirect effects were examined using bootstrapping.
Results First, fear of negative evaluation was negatively related to self-disclosure, perceived supervisor authenticity, and supervision satisfaction, while self-disclosure, perceived supervisor authenticity, and supervision satisfaction were positively related to each other. Second, fear of negative evaluation had a direct effect on self-disclosure, but not on supervisor authenticity and supervision satisfaction. Third, fear of negative evaluation was found to affect supervision satisfaction through self-disclosure and perceived supervisor authenticity sequentially.
Conclusions This study revealed the importance of supervisee self-disclosure as a variable that influences supervision satisfaction. These findings suggest that when supervisees open up about their own factors, as well as the factors of the client and the supervision relationship, in the supervisory context, supervisees perceive the supervisor's authenticity and increase supervision satisfaction.
The mediating effect of ambivalence over emotional expressiveness in the relationship between self-differentiation and interpersonal relationship ability in middle-aged women
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Lee Geum-dan , Lee Ho-jun
Published: February 2025

Objectives The purpose of this study is to examine the relationship between self-differentiation, ambivalence over emotional expressiveness, and interpersonal relationship ability in middle-aged women, and to examine whether ambivalence over emotional expressiveness plays a mediating role in the relationship between self-differentiation and interpersonal relationship ability.
Methods For this purpose, an online survey targeted middle-aged women aged between 40-59 over the country was conducted, and 275 answers were analyzed with SPSS 27.0 and SPSS Process Macro 4.1.
Results The results of the study are as follows. First, it was found that there was a significant positive correlation between self-differentiation and interpersonal relationship ability. Second, there was a significant negative correlation between self-differentiation and ambivalence over emotional expressiveness. Third, by examining the mediating effect of ambivalence over emotional expressiveness by sub-factor, self-defensive ambivalence did not appear to have a mediating effect in the relationship between self-differentiation and interpersonal relationship ability, whereas relationship-involved ambivalence had a mediating effect.
Conclusions Through this research, it was confirmed that relationship-related emotional expression ambivalence plays a certain role in the process in which middle-aged women's self-differentiation affects their interpersonal ability. It means that the issues of conflicts due to relationship-involved motivation should be handled while counseling middle-aged women with difficulties in interpersonal relationships.
Interações imunológicas na dermatite atópica e psoríase: uma revisão narrativa
Authors:   , Nogueira Beatriz Ribeiro , Silva Maristela de Araujo , Silva Rafaela Amorese
Published: February 2025

A dermatite atópica (DA) e a psoríase são doenças inflamatórias crônicas de pele que afetam uma significativa parcela da população. Este trabalho revisa as interações imunológicas que caracterizam essas condições, destacando as semelhanças e diferenças em seus mecanismos patológicos. A DA é predominantemente associada a uma resposta imunológica de tipo 2, enquanto a psoríase é impulsionada por respostas Th1/Th17, envolvendo citocinas como IL-17, IL-23 e TNF-alfa. Além disso, a pesquisa aborda a influência de fatores genéticos e ambientais no desenvolvimento dessas doenças, bem como os avanços terapêuticos, incluindo o uso de inibidores de citocinas, que têm mostrado eficácia no tratamento. A análise conclui que, apesar das semelhanças, cada condição possui características patológicas distintas que determinam suas manifestações clínicas e progressão. Essas informações podem contribuir para o desenvolvimento de tratamentos mais eficazes para ambas as condições.
Investigating analytical solutions for (2+1)-dimensional M-truncated burgers model
Authors: Al-Malki Mushrifah , Abdalrhim Ehssan , Mohamed Mona , Areshi Mounirah , Mubaraki Ali , Abdel-Khalek Sayed
Published: February 2025

In this study, we employed the M-truncated fractional singular manifold
meth?od to analytically address the (2+1)-dimensional M-truncated fractional
Burgers equation. This approach involves reformulating the original
fractional differen?tial equation into a more tractable form through the
introduction of a singular manifold. This transformation simplifies the
problem and often leads to analytical solutions. We derive a general
solution expressed in terms of arbitrary functions, which enables us to
accommodate variations in system parameters or initial condi?tions. This
results in a versatile expression that captures a broad spectrum of
pos?sible solutions, providing a framework for analyzing the dynamics of
kink waves in the relevant fractional differential models. We also construct
multiple kink wave solutions, offering analytical representations of kink
wave behavior within these models. Notably, our findings revert to
well-established results when the fractional order is set to one, thereby
affirming the consistency of this method with existing theories and
validating our approach.
Structural and magnetic properties of nanoparticle semiconductors La1-xSrxMnO3
Authors: El-Qahtani Zainab , Adam Alaa , Elshafaie Ahmed , Ibrahim Eslam , Ahmed Ahmet , Abdelsalam Hanadi , Daqqa Ibtisam , Osman Khalda
Published: February 2025

With a view to investigate the magneto-structural properties and influence of
an?nealing on magnetoresistance of strontium-doped lanthanum manganite,
samples of La1-xSrxMnO3 were prepared and their magneto-transport properties
have been investigated in this article. Magnetoresistance is enhanced from
6% to about 94% at room temperature due to annealing. Resistivity and
Seebeck coefficient were investi?gated over the temperature range 83 ? T ?
313 K. The quasi-static magnetization was investigated in the temperature
range of 5-400 K under effect of a magnetic field of 100 Oe in both moods of
field cooling presence besides the zero field cooling. The measurements of
magnetization showed Curie transition from ferromagnetic be?havior to
paramagnetic one. The Curie transition values increased with increasing the
strontium content suggesting that the transfer integral between two Mn sites
would be enhanced due to the substitution of smaller La ions (117.2 pm) by
great?er Sr ions (132 pm). Various parameters were calculated from the
application of variable range hopping and single polaron hopping models.
Both models were utilized to investigate the effect of Sr on the conduction
behavior. The behavior of thermopower with temperature was demonstrated on
the basis scatterings of phonon-and magnon-.
Audience as Co-writers: Using Conversational AI to Deliver Audience Agency in a Participatory Drama
Authors: Lander Rik
Published: February 2025

This article will offer a glimpse into the elusive holy grail for participatory dramatists: a way to offer audience members a role within the narrative and to give them genuine agency over events and even the outcome. I will describe the use of a ‘conversational artificial intelligence’ as both a character in, and the co-writer with the audience of, a live theatrical drama, called I am Echoborg. This approach represents a novel and powerful means of delivering to audience members both narrative agency and the ability to take on a role in the drama. It also demonstrates how, in the right conditions, an AI can be a plausible and compelling dramatic character. I will explore some of the psychological mechanisms exploited in the creation of this immersive event such as breaching environments and projection of theory of mind. I will look at how some of the affordances of the technology can be exploited for dramatic purposes such as redirection. I will discuss some of the particular issues faced by makers of participatory narratives and methods to overcome them. I will trace the development of the show and look at some examples of other artworks that rely on user generated content and how they deal with quality control. Finally, I will look at the importance of structure as a means of balancing authorial voice and audience agency.
Is This Even Possible?: Co-creating University and Industry Learnings for Immersive Experiences
Authors: Patrickson Bronwin , Davies Helen
Published: February 2025

This article discusses an ambitious university-industry collaboration based at the University of South Wales that was designed to further develop digital storytelling practice within the UK Creative Industries. During this UKRI-funded, Audience of the Future R&D demonstrator project, the authors collaborated with Bristol-based animation studio Aardman, who were both licensors and content contributors for an immersive transmedia experience called The Big Fix Up based on the globally loved Wallace and Gromit intellectual property. Working closely with Aardman, the consortium drew upon their combined skills in games production, animation, creative marketing and new technology development to create a mobile application that marries Wallace and Gromit with mobile storytelling and the latest augmented reality and mixed reality technologies. One of the key aims of this larger industry-led demonstrator programme was to propel new immersive storytelling insights informed by extensive audience research. In their article, Davies and Patrickson examine this university-industry collaboration in methodological terms, outlining the factors that enabled them to negotiate cross-sector issues whilst reflecting on the multi-faceted approach to audience research that emerged from those negotiations.
Effect of Using Tithonia diversifolia Green Manure and Trichoderma sp. Secondary Metabolites on the Growth and Yield of Tomato Plants (Solanum lycopersicum L.) on Alluvial Soil
Authors: Suyanto Agus , Setiawan  , Astar Ismail
Published: February 2025

The primary challenge in utilising alluvial land for tomato cultivation was the low soil fertility. Tithonia diversifolia can be used as an ameliorant to address this issue. Additionally, secondary metabolites from Trichoderma sp. can be employed to control plant diseases. This research aimed to assess the impact of using Tithonia diversifolia green manure and Trichoderma sp. secondary metabolites on the growth and yield of tomato plants in alluvial soil. The research was conducted in the experimental field of the Faculty of Agriculture, Science, and Technology, Panca Bhakti University Pontianak, from December 2023 to March 2024. A factorial completely randomised design (CRD) was implemented, involving two factors: the first factor was T. diversifolia green manure (p) with three treatment levels: p1 = 200 g per polybag, p2 = 250 g per polybag, p3 = 300 g per polybag. The second factor was Trichoderma sp. secondary metabolites (m) with three treatment levels: m1 = 100 mL per plant, m2 = 150 mL per plant, m3 = 200 mL per plant. Observations focused on plant growth and yield. Data were analysed using the F-test and Tukey test at the 5% significance level. The application of 300 g of Tithonia diversifolia green manure and 200 mL of Trichoderma sp. secondary metabolites can enhance the growth and yield of tomato plants optimally in alluvial soil, although no significant interaction was observed (p > 0.05). Further research is needed to identify other factors that influenced the interaction so that the use of Tithonia diversifolia green manure and Trichoderma sp. could be recommended to increase tomato productivity in alluvial soil.
The Sorption Studies of Waste Cooking Oil using Raw and Treated Pineapple Crown Leaf
Authors: Ni Rabuyah , Mustapha Kamal Abdul Somad , Shah Jahan Shahrina , Ismail Siti Hajijah , Ramji Harunal Rejan
Published: February 2025

The unregulated discharge of pollutants into water bodies has become an issue that led to pollution. Fiber derived from various forms of agricultural wastes as the sorbent is widely used as it has a high sorption capacity and efficiency. It is environmentally friendly and could be cost-effective as it only utilizes the unwanted parts of plants, which usually would otherwise be discarded. The pineapple crown leaf (PCL) and other plants with high cellulose content have potential for environmental applications. Oil pollutants, particularly waste cooking oil (WCO) from the food and beverage industry, often contaminate water bodies due to poor waste management. Using cellulose-rich plants like PCL could offer an effective solution for absorbing these pollutants. This study examines the characteristics and sorption capacities of raw, NaOH treatment PCL, and carbonized PCL to develop an effective, eco-friendly method for oil spill remediation. The methodology involves washing, drying, grinding, and sieving PCL to obtain a powdered PCL. Then, raw PCL (RPCL) undergoes chemical treatment with 10% sodium hydroxide, NaOH and thermal treatment at 300 °C. The raw and treated PCL were characterized using Fourier Transform Infrared Spectroscopy (FTIR). The elimination of some non-cellulosic components in NaOH-treatment PCL (CPCL) and carbonized PCL (TPCL) observed in the FTIR spectrum would contribute to higher sorption efficiency and capacity of WCO. In agreement with the results from FTIR analysis, the highest sorption efficiency in pure oil was shown by TPCL at 33% and CPCL in slick oil at 16.33%. The highest value for pure and slick oil recorded for sorption capacity was 9.23 g g−1 from TPCL samples and 4.3 g g−1 from CPCL samples. This study supports sustainable waste management and green technology for environmental remediation, highlighting PCL's potential in mitigating oil pollution and the value of agricultural waste in creating eco-friendly solutions for oil disposal challenges.
Мaterial Selection for Additive Manufacturing of the Shrouded Impeller of a High-Speed Centrifugal Compressor
Authors: Chu V. Ch. , Basati Panah M. , Suhanov A. I. , Pham T. Q. , Rassokhin V. V. , Barskov V. V. , Matveev Y. V.
Published: February 2025

The traditional manufacturing process for shrouded impellers in centrifugal compressors is characterized as a multi-stage process, which involves attaching blades to the impeller and welding a cover disk to the blades. Despite the extensive experience gained with traditional manufacturing methods, including laser welding, transitioning to additive manufacturing technology offers significant advantages: it enables the production of a shrouded impeller as a single, seamless part with no joints, thereby reducing the likelihood of defects. This article examines the stress and deformation behavior of a shrouded impeller in a centrifugal compressor operating at high rotational speeds (60400 rpm). A three-dimensional model was created, and a strength analysis was conducted to evaluate the structural integrity of the impeller. The calculations were performed using the ANSYS Workbench 2019 software. The results identified the locations of maximum stress concentration, which occur at 30 – 40% of the main blade length and near the leading edges of the splitters. In these regions of stress concentration, the ductility of the impeller material was considered. The primary mechanical properties of the additive materials used for the impeller — stainless steel grade 316, aluminum alloy AlSi10Mg, titanium alloy Ti-6Al-4V, and martensitic steel 17-4PH — were specified. The analysis showed that the titanium alloy Ti-6Al-4V best satisfies both the strength and technological requirements.The conducted analysis facilitated the selection of a suitable material for the rotating components of high-speed turbomachinery.
Numerical modeling of the processes of heating, evaporation and combustion of emulsified fuel
Authors: Batrakov P. A. , Ryzhnikova E. A. , Batrakova A. A.
Published: February 2025

The issue of mixing fuel oil with water, i. e. emulsification, is considered. Emulsified fuel of the “water-fuel oil” type is a promising alternative fuel, as it causes water to boil at high temperatures, which can improve the atomization of the fuel spray. The process of heating and evaporation of a droplet of emulsified fuel depends on the diffusion and coalescence of the smallest water particles in the fuel oil, which occur during heating. The article presents a model that accounts for the process of water diffusion in droplets of emulsified fuels, as well as the physical properties of the entire medium. The model incorporates these important physical phenomena and offers an effective method for calculating the ratio of emulsion components. It is designed to describe the heating and evaporation of droplets of emulsified fuel, such as “water-fuel oil”. The process of water coalescence is simplified by the fact that dispersed water droplets instantly combine into a single water subdroplet in the center of the fuel oil droplet. During the calculations, the proportions of each component are taken into account; in addition to the combustion of the carbon content of the fuel oil, it is necessary to consider the heat release of water vapor, the release of hydrogen, the dissociation of water and the thermal effect of hydrogen combustion. These processes occur in the same proportions as in the water-fuel oil emulsion. To address the tasks at hand, the ANSYS CFX module was selected, which allows for the simulation of chemical reactions and combustion processes associated with liquid flow. This will enable a detailed study of the phenomena occurring and help determine the optimal parameters of the water-fuel oil emulsion, thereby increasing operational efficiency. Based on the proposed model, the combustion process in the furnace volume as a function from the water content in the emulsified fuel was analyzed.
Land-use evolution in an island urban setting: A three-decade analysis of Machico, Madeira (1990–2018)
Authors: Lousada Sérgio , Gómez José Manuel Naranjo , Fernandes Mário , Raposo Mauro , Alves Raul , Jankauskienė Dainora
Published: February 2025

The sustainable development of Madeira Island necessitates the implementation of more precise and targeted planning strategies to address its regional challenges. Given the urgency of this issue within the context of sustainability, planning approaches must be grounded in and reinforced by a comprehensive array of thematic studies to fully grasp the complexities involved. This research leverages Geographic Information Systems (GIS) to analyze land use and occupancy patterns and their evolution within the municipality of Machico on Madeira Island. The study provides a nuanced perspective on the urban structure’s stagnation in the region, while concurrently highlighting the dynamic shifts in agricultural practices. Furthermore, it elucidates the transformation of predominant native vegetation within the municipality from 1990 to 2018. Notably, the research underscores the alarming decline in native vegetation due to anthropogenic activities, emphasizing the need for more rigorous monitoring by regional authorities to safeguard and preserve these valuable landscapes, habitats, and ecosystems.
Historia – nauka w dyskursie kryzysowym
Authors: Solska Ewa
Published: February 2025

The paper is an attempt at metasearch reflection on the current discursive positioning of disciplinary history in relation to methodological issues focused on its scientific status in confrontation with historical Pyrrhonism. This attempt is developed in the following threads: tropes of the crisis discourse and tropes of the modernisation discourse – towards (the concept of) research and learning history from the perspective of consilience and the methodological expansionism of the contemporary humanities. The question arises as to whether disciplinary history has a distinguished scientific status, and therefore an important cognitive and axiological function among other areas of historical research, or whether it is rather an instrument of power that manages symbolic violence. Current revisionist discourses in the areas of anthropology, sociology, cultural studies and memory studies follow this path, and methodologists are concerned with the question of their consequences for the discipline of history. One of them is that contemporary Pyrrhonism focuses on questioning the cognitive and axiological value of European (Western) history in the face of the "history‑resistant pasts" discourses within the framework of the postcolonial criticism and the indigenous turn. Hence the contextual reference to the narrative of historical Pyrrhonism from the 1970s, including the retreat from national‑centric historiography (in the model of neo‑historicism), the entry of other disciplines into the field of historical research, and the displacement of disciplinary history from its centre. Currently, this should be considered in relation to the postulate of the sovereignty of the discipline of history, and, on the other hand, the phenomenon of post‑disciplinary transgression in humanities towards a multi‑, inter‑ and transdisciplinary model in new orientations and research programs. In connection with this, the ultimate goal of the considerations here is to defend the conciliatory perspective in multidisciplinary historical research and the concept of its multilateral presence.
Border disease in a flock of Minnesota sheep
Authors: Ames T. R. , Robinson R. A. , Johnson D. W. , O'Leary T. P. , Fahrmann J. W.
Published: February 2025

A flock problem affecting newborn lambs on a Minnesota farm was investigated. The lambs had hairy fleece and rhythmic tremors, and were unthrifty. Histologic examination revealed hypomyelinization of the cns and hypertrophy of primary follicles in the skin. A virus antigenically related to bovine viral diarrhea virus was isolated. Serum neutralization showed that a large number of flock ewes had much higher titers to bovine viral diarrhea virus than did control animals.
Adoption of cryptocurrencies by financial institutions: challenges and opportunities in the digital economy
Authors: Luo Qianyi
Published: February 2025

This paper quantitatively analyses the development status and market share of cryptocurrencies by collecting relevant information and explores the correlation between the cryptocurrency market and the performance of China’s financial market and financial market pressure through the correlation analysis method. Using VAR model impulse analysis to portray the dynamic relationship between cryptocurrencies and the financial market during unexpected events can help show the risk changes of the cryptocurrency market more intuitively. The analysis shows that cryptocurrencies have entered a stage of explosive development, and by 2023, their overall market value will reach about $3 trillion. Among them, Bitcoin has a market share of 39.8%. The correlation coefficients of Bitcoin, Litecoin, Ethereum, and Ripple with the Chinese financial market are -0.0138, −0.0225, −0.0114, and −0.0143, which are negatively correlated. There is a correlation between cryptocurrencies and the impact of market volatility.
The Use of Artificial Intelligence in The Development of Vision Aids for The Visually Impaired
Authors: Lukman Lukman , Bakti Rizky Yusliana , Angreani Desy , Alamsyah Muh.
Published: February 2025

The development of assistive technologies for the visually impaired has gained significant attention in recent years, with Artificial Intelligence (AI) playing a key role in advancing vision aids. This study explores the use of AI in enhancing the functionality and accessibility of vision aids for the visually impaired through a qualitative, literature-based approach. By reviewing existing studies and research on AI-powered devices such as smart glasses, object recognition systems, and AI-guided navigation tools, this paper identifies how AI contributes to improving the quality of life for individuals with visual impairments. The study highlights key AI technologies, including computer vision, machine learning, and natural language processing, that allow devices to provide real-time information about the surrounding environment, recognize objects, and assist with daily tasks. Furthermore, this paper discusses the challenges of developing AI-based vision aids, such as technological limitations, user acceptance, and affordability, while emphasizing the need for interdisciplinary collaboration in creating more effective solutions. The findings suggest that AI has the potential to significantly enhance the independence of visually impaired individuals by enabling smarter, more responsive assistive devices. Future research is recommended to focus on empirical studies, long-term user experiences, and the ethical considerations surrounding AI use in assistive technologies.
Innovation in Waste Management Methods for Sustainable Tourism (A Case Study at Pullman Hotel Lombok)
Authors: Veronica Veronica , Tirtadidjaja Andari , Michaela Janice Aveline
Published: February 2025

Sustainable tourism has become a key focus in the development of the global tourism industry, with Lombok as a major destination facing challenges in waste management. Ineffective waste management threatens environmental sustainability, the quality of tourist destinations, and has negative impacts on the surrounding communities. Therefore, innovation in waste management within the hospitality sector is crucial to support the principles of sustainable tourism. Pullman Hotel Lombok has adopted the Green Hotel initiative to minimize environmental impacts through eco-friendly waste management. This research aims to explore waste management innovations at this hotel, focusing on waste segregation, the processing of food waste into organic liquid fertilizer, and their impact on environmental sustainability and hotel operations. The research methodology includes in-depth interviews with management and relevant staff to identify the waste management practices implemented. The findings reveal that waste management innovations at Pullman Hotel Lombok successfully reduce waste volume, improve soil quality, and decrease greenhouse gas emissions, supporting the achievement of Sustainable Development Goals (SDGs). This study recommends developing more efficient waste management technologies and enhancing local community awareness through continuous training programs to promote sustainable practices in the hospitality and tourism sectors.
Driving Factors Behind Turkey's Establishment of The Turkey-Russia Joint Center in 2020
Authors: Ismiyatun Ismiyatun , Purwono Andi , Maulida Novianda
Published: February 2025

The Nagorno-Karabakh conflict is a territorial dispute between Armenia and Azerbaijan in 2020 that attracted the attention of international actors, especially Turkey and Russia. In times of peace of conflict, Turkey entered into an agreement with Russia to carry out the construction of the Turkish-Russian Joint Center. The purpose of this study is to find out the factors that are the reasons for Turkey to make an agreement with Russia in establishing a Joint Turkish-Russian Center. Using qualitative descriptive research methods with data and information collection techniques in accordance with references from books, journals, and articles on the web. The theory used is the decision-making theory initiated by Richard Snyder, H.W. Bruck, and Burton Sapin, that "the actions of a country are foreign policies that are influenced by internal and external conditions". The first is Turkey's dependence on Russia in nuclear projects and agreements on the purchase of military equipment, while in the external sphere there is a great influence of Russia's geopolitics in the Caucasus region as well as in the conflict.
The Influence of Competence, Work Discipline, and Work Environment on Employee Performance at the General Secretariat (Setum) of East Java Regional Police (Polda Jatim)
Authors: Siswanti Luluk Erna , Kustiningsih Nanik , Rahayu Sri
Published: February 2025

This research aims to examine the influence of competence, work discipline, and work environment on employee performance at the General Secretariat (Setum) of the East Java Regional Police (Polda Jatim). The study uses a quantitative approach with multiple linear regression analysis to assess the impact of these factors on employee performance. The results show that competence has a significant positive effect on employee performance, as most employees possess strong knowledge and skills related to their work. Work discipline also significantly affects performance, as employees consistently adhere to rules, show punctuality, and are responsible for their tasks. Furthermore, the work environment has a notable influence, with employees reporting strong support from leadership, good communication, and effective collaboration with colleagues. When examined simultaneously, competence, work discipline, and the work environment collectively contribute to improved employee performance at Setum Polda Jatim. These findings suggest that enhancing employee competence through continuous training, reinforcing discipline, and creating a supportive work environment can significantly improve overall performance in the organization.
Capacity Building of Village-Owned Enterprises (BUMDes) in Encouraging Village Economic Welfare
Authors: Adeningsih Siti Hutami
Published: February 2025

This study aims to examine the capacity building of village-owned enterprises (BUMDes) in encouraging village economic welfare based on the organizational capacity theory from Grindle (1997) which has three main indicators, namely strengthening organization and management, providing resources and infrastructure facilities, and network. The research method in this study is qualitative descriptive with the technique of collecting literature study data from various secondary sources such as books, scientific articles, government regulations, theses and other relevant scientific documents. Data analysis is carried out by data reduction, data presentation to drawing conclusions. The results of the study show that based on the Grindle theory (1997), strengthening the capacity of BUMDes can be done by measuring from three indicators, namely 1) strengthening organization and management; 2) provision of resources and infrastructure; 3) Network (cooperation). ). The success of strengthening BUMDes capacity based on Grindle's theory greatly influences the sustainability and operation of BUMDes.