bluuebunny/crossref_metadata_2025 huggingface dataset:
A Study on the Perception of Multimedia Utilization Education in the Reflection Journal of Preliminary Early Childhood Teachers
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Oh Heejung , Lee Jeonghun
Published: March 2024

Objectives In this study, we tried to analyze the perception of multimedia utilization education in reflection journals of preliminary early childhood teachers.
Methods This study utilized qualitative research methods. Specifically, 63 first-year students at S University, a three-year university located in Gyeonggi-do, were repeatedly read through reflective journals written after taking the ‘Multimedia Utilization Education’ course and field texts written by instructors to find stories that fit the purpose of the study. It was qualitatively analyzed by time, category, and large and small meaning units, and the researcher reorganized it to clearly reveal its meaning.
Results As a result of the study, the final derived topics are as follows. First, understanding multimedia that feels close and distant. Second, recognizing and developing various aspects. Third, positively promoting work and learning as an early childhood teacher. Fourth, building up an identity as an early childhood teacher. And fifth, taking a step toward better multimedia utilization education.
Conclusions This study is expected to be used as basic data to provide preliminary early childhood teachers' understanding of multimedia-based education, support directions for the actual educational content composition of the subject, and learner-centered educational guidelines.
Analysis of Native English-Speaking Professors’ Teaching Competency-Based Educational Needs
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Kim Myunghee
Published: March 2024

Objectives This study was conducted with the purpose of enhancing the quality of general English classes by improving the teaching competencies of native English-speaking professors. For this purpose, the teaching competency-based educational needs of native English-speaking professors at S University were analyzed.
Methods A survey was conducted in August 2023 among all native English-speaking professors at S University to assess the importance and implementation levels of teaching competencies. The 35 collected responses were analyzed using paired-sample t-tests, Borich’s needs assessment model, and the Locus for Focus model. The integration of these methods resulted in a ranking of educational needs.
Results The competencies with the highest educational demand were identified as follows: ‘summary of class content at the end of class’, ‘feedback on learning activities’, ‘class analysis and improvement through self-reflection’, ‘class improvement through student performance analysis’, and ‘effort to strengthen teaching competencies in response to environmental changes’. The next most in-demand competencies selected were: ‘providing opportunities for students to freely express their thoughts and participate in class’, ‘utilization of various teaching methods, media, and content’, ‘understanding the university's desired attributes and core competencies’, ‘linking the university's core competencies and subjects’, ‘easy-to-understand explanations’, and ‘CQI report writing’.
Conclusions Based on the research results, the following recommendations are proposed: First, prioritizing educational support, such as special lectures, workshops, and consulting, is required to enhance the class conclusion and feedback competencies of native English-speaking professors. Second, educational and institutional support is necessary to enable native English-speaking professors to reflect on and improve their teaching. Third, various teaching support programs should be provided to enable native English-speaking professors to develop teaching strategies that stimulate students’ class participation and interest in learning. Fourth, to achieve the university’s pursuit of core competency-based classes, it is essential to enhance native English-speaking professors’ understanding of the university’s objectives.
The relative influence of parenting efficacy, fathers’ participation in parenting and social support on parenting stress of mothers with early children
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Kim Kyeoung-Min , Lee Hee-Yeong , Choi Tae-Jin
Published: March 2024

Objectives The objective of this study was to investigate the influence of parenting efficacy, fathers’ participation in parenting and social support on parenting stress of mothers with early children.
Methods To solve these research question, an online survey was conducted on mothers with early children aged 3 to 5 in South Korea through online communities related to childcare, and the analyses were based on data answered by 241 people.
Results First, parenting efficacy, fathers’ participation in parenting and social support on parenting stress showed negative correlations. Fathers’ participation in parenting had the greatest influence on daily stress caused by child rearing, and parenting efficacy had the highest influence on burden and distress caused by parental roles. Second, as a result of examining the relative influence of each variable influencing mother’s parenting stress, the variables influencing daily stress from child rearing were social support and fathers’ participation in parenting. As sub-variables, ‘evaluative support’ of social support, and ‘self-growth’ of fathers’ participation in parenting were highly influential. The variables that influence burden and distress due to parental roles were fathers’ participation in parenting and parenting efficacy. And as sub-variables, ‘joint parenting’ of fathers’ participation in parenting, and ‘general parenting ability’, ‘communication skills’ of parenting efficacy were influential.
Conclusions The variables that influence both daily stress due to child rearing and burden and distress due to parental roles were in fathers’ participation in parenting. These results can be used as important basic data in developing an approach to reducing parenting stress for mothers with early children.
The effect of parental coaching competency on young children’s creative leadership: Mediating effect of positive psychological capital
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Kim Hee Jung , ki Eun Ha
Published: March 2024

Objectives The purpose of this study was to investigate the mediating effect of positive psychological capital on the effect of parent coaching competency on young children's creative leadership.
Methods This study targeted 301 parents of children aged 3 to 5 attending early childhood education institutions located in G Metropolitan City and J Province. The test tools include the young Children's Creative Leadership Scale developed by Lee Kyeong-hwa and Yoo Kyeong-hoon (2010), the Parent Coaching Competency Scale by Do-hyang Do, Kim Geun-ju, and Lee Gyeong-ju (2019), and the Korean version of the scale by Luthans, Avolio, and Norman (2006) by Tae-hong Lim (2013). The adapted, modified, and supplemented positive psychological capital scale was used. SPSS 23.0 program was used for data analysis.
Results First, it was found that there was a significant correlation between parent coaching competency and children's creative leadership, between parent coaching competency and parents' positive psychological capital, and between parent positive psychological capital and children's creative leadership. Second, parent coaching competency was found to have an impact on children's creative leadership, and parents' positive psychological capital was found to have a mediating effect between these variables.
Conclusions This study reveals the importance of parent variables in promoting young children's creative leadership. Therefore, this suggests that there is a need to develop various parent support programs and provide educational opportunities that can enhance parents' coaching capabilities and positive psychological capital.
Analysis on Elementary Pre-service Teachers’ Stages of Concern about Ecological Transformation Education
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Park Hyeonjin , Suh Soonshik
Published: March 2024

Objectives In elementary education, the introduction and spread of ecological transformation education is in full swing. The purpose of this study is to analyze the concern stages of elementary pre-service teachers in ecological transformation education and whether there is a difference in interest level depending on background variables.
Methods The Stages of Concern Questionnaire(SoCQ) was distributed offline to 320 elementary pre-service teachers. The results of 296 surveys, excluding 24 insincere responses, were used, and descriptive statistics, t-test, and one-way ANOVA analysis were performed using SPSS statistical program. In addition, the average of the raw scores for each stage was calculated, and the average value was converted to a percentage value using the SoCQ conversion table.
Results The results of this study are as follows. First, concern stages of elementary pre-service teachers in ecological transformation education remained in the ‘self’ cluster, and the score in the ‘task’ or ‘impact’ cluster was low. Second, as a result of comparing concern in ecological transformation education by gender, both male and female student profiles were similar to those of the nonuser group, but female students' concern scores were higher than male students' scores. Third, the profile of concern in ecological transformation education according to preference for ecology/environment topics and degree of eco-friendly practice appeared in a similar form.
Conclusions The conclusions of this study are as follows. First, universities in education need to make primary efforts to reduce students' unconcerned stage about ecological transformation education. Second, attention must be paid to the overall design and operation of the teacher training curriculum to prevent differences in concern in ecological transformation education depending on the gender. Third, various practical programs should be prepared to increase students' ecological/environmental preferences, and ultimately, it should affect students' interest in ecological transformation education.
“A Case Study of Group Art Therapy Using Calligraphy for the Social Engagement Activation of Early Onset Dementia Patients”
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Song Jeong-Eun , Lee Eun-Ju , Jung Na-Na , Lee Sung-Hee , Kim Jee-Eun
Published: March 2024

Objectives The purpose of this study was to analyze how group art therapy using calligraphy impacts the social engagement activation of early onset dementia patients.
Methods The group therapy was conducted for six early-onset dementia patients who were registered at the S Metropolitan Center for Dementia. The program consisted of eleven sessions and ran once a week from July 31, 2023, to November 6, 2023. The group art therapy program involved education and learning in each session to enable early-onset dementia patients to use the medium themselves and complete artworks. Based on this, participants were guided to complete artistic works. The research data were collected and analyzed using pre- and post-data (CIST and SGDS-K), therapist's session evaluations, observation notes, pre- and post-DAS (The Draw-a-Story) drawing test, and in-depth interviews with 2 participants and partners of 3 participants. The results of the in-depth interviews were cross-analyzed and categorized by two researchers under supervision to derive the findings.
Results As a result, firstly, most of the patients who participated in the program maintained or developed their cognitive skills and lowered their depression inventory. Second, participants indicated improvement in their social skills and an increase in awareness and experience related to social engagement. Based on the experience of the art therapy group, participants’ showed positive changes in awareness of social engagement
Conclusions This study is meaningful in confirming the impact of group art therapy using calligraphy on alleviating difficulties and promoting social engagement in early-onset dementia patients. Therefore, it is expected to contribute to the activation of social engagement for early-onset dementia patients.
The Effects of Adolescents' Smartphone Overdependence and Self-esteem on Aggression
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Park BongHwan
Published: March 2024

Objectives The purpose of this study is to investigate the relationship between adolescents' smartphone overdependence, self-esteem, and aggression.
Methods The data of 2,275 in the Year 4 of the Korea Children and Youth Panel Survey (KCYPS) 2018 were analyzed. The analyzed data was subjected to frequency analysis, reliability analysis, technical statistical analysis, and correlation analysis using the SPSS 24.0 program. In order to analyze the mediation effect of self-esteem in the relationship between smartphone overdependence and aggression, we conducted Baron and Kenny's mediation analysis and the Sobel Test to verify the significance of the mediation effect.
Results The results of this study are as follows. First, smartphone overdependence and Aggression showed a positive correlation, Second, in the relationship between smartphone overdependence and aggression, the self-esteem concentration showed a partial mediating effect.
Conclusions This study confirmed that smartphone overdependence has a direct effect on adolescents' aggression, and that aggression is alleviated when mediated through self-esteem. These results discussed practical interventions in the development of educational programs and self-esteem promotion activities that can be mediated by protection and motivation factors to lower adolescents' overuse of smartphones and aggression levels.
Research on Interjections in Korean and Japanese Utilizing Drama: Focusing on Responsive and Non-responsive Expressions
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Park hyunkyung
Published: March 2024

Objectives The purpose of this study is to contrast passive expressions in Korean and Japanese utilizing drama. Since human language use serves as a tool for communication, passive expressions, frequently used in real-life situations, carry significant meaning. Although Korean and Japanese share similarities in vocabulary and syntactic structures, differences arise based on the concept and conditions of passivity. Moreover, Korean passive expressions exhibit a greater variety and lower productivity compared to Japanese, necessitating a systematic comparative study.
Methods First, analyzing the drama ‘Misaeng,’ consisting of 20 episodes aired on tvN, transcripts of Korean dialogue and Japanese subtitles were compiled. The expressions and frequencies of suffix passive, syntactic passive, and lexical passive were extracted from the Korean dialogue. Second, the expressions and frequencies of passivity were extracted from the Japanese subtitles. Third, corresponding patterns and frequencies of passivity in both languages were determined, compared, and analyzed. Fourth, examples of passive expressions in Korean and Japanese were presented.
Results Upon analyzing Korean and Japanese passive expressions, results revealed a total of 121 instances of suffix passive, with the ‘-이’ suffix being the most frequently used (56 instances), followed by ‘-리,’ ‘-히-,’ and ‘-기-’ in descending order. Syntactic passive amounted to 25 instances, with ‘-어지다’ occurring 19 times and ‘-게되다’ appearing 6 times. Lexical passive totaled 123 instances, with ‘-되다’ accounting for 83 occurrences, ‘-받다’ for 27, and ‘-당하다’ for 13. When Korean was in the passive form, and Japanese was not, a total of 176 instances were identified. This included 67 cases of suffix passive, 13 of syntactic passive, and 96 of lexical passive. Conversely, when Japanese was in the passive form, and Korean was not, a total of 226 instances were observed. This encompassed 27 instances of suffix passive, 57 of syntactic passive, and 76 of lexical passive. Additionally, there were 66 instances of Japanese passive that did not correspond to Korean passive expressions.
Conclusions This study systematically examined and compared passive expressions in Korean and Japanese by analyzing subtitles in dramas, specifically focusing on the patterns of corresponding and non-corresponding passivity. The analysis revealed distinct differences rather than commonalities in passive expressions between the two languages, and through various examples, linguistic and cultural disparities were highlighted. The practical investigation of passive expressions in Korean and Japanese serves as foundational material for Japanese learners studying Korean, offering valuable insights into language and cultural differences.
Development of artificial intelligence education program based on visualizing public data for cultivating knowledge-information processing and creative thinking competencies
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Kim Kwang-Ho , Song Young-Jae , Yoo Hyun-Seok
Published: March 2024

Objectives The purposes of this study are to develop an artificial intelligence utilization education program based on visualizing public data and using it for problem solving to cultivate knowledge-information processing and creative thinking competencies for middle school students, and to analyze its effectiveness in cultivating each of these competencies.
Methods This study was conducted applying PDIE model of which stages contain preparation, development, implementation, and evaluation. and developed an eight-session education program for middle school students to visualize public data to find problems, explore ideas to solve them, and realize their ideas through making model using artificial intelligence. In this study, two classes of third grade middle school students were organized as a single group after convenience sampling to conduct pre- and post-tests. The collected data were analyzed using paired sample t-tests, and after among the open-ended responses, the education program was modified and supplied and supplemented.
Results As a result of applying the education program of this study to a middle school, a substantial enhancement was found in both knowledge-information processing and creative thinking competencies, and learning satisfaction was at a good level.
Conclusions It is significant that the artificial intelligence utilization education program based on visualizing public data is closely related to learners' lives, and the program has proven effective in cultivating knowledge-information processing and creative thinking capabilities of middle school students by applying the education program into the technological problem-solving process based on competency of the subject matter of technology.
The Epistemological Belief of Chemistry Subjects and Their Effects on Chemistry Academic Achievement according to the R&E Research Activity Group of Science High School Students
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Shin Dong-Seon
Published: March 2024

Objectives This study studied the epistemological beliefs and effects of the science and mathematics R&E research activity group on chemistry academic achievement in the first year of science high school.
Methods 96 first-year G Science High School students in Gyeongnam were surveyed and analyzed for epistemological beliefs in chemistry for six months from April to September 2023. The academic achievement of chemistry subjects was used by dividing the grades at the end of the first semester of chemistry in the first semester of the first year by ‘high’ and ‘low’ levels. Descriptive statistics, cross-analysis, and nonparametric tests were analyzed with SPSS 28 programs to compare epistemological beliefs in chemistry subjects according to the R&E research activity group.
Results In the results of a survey on epistemological beliefs in chemistry subjects for each R&E research activity group, the chemistry R&E class showed a higher favorable response rate than other R&E classes, and in particular, there was a statistically significant difference in the ‘outcome’ factor. The higher the favorable response rate of epistemological beliefs to chemistry subjects, the higher the chemical academic achievement, and there was a statistically significant difference between the ‘upper’ and ‘lower’ levels in the ‘math link’ and ‘concepts’ detailed factors.
Conclusions Since chemistry R&E classes are selected by students who are interested and interested in chemistry subjects, it is recognized as an academic field with a high favorable response rate for chemical knowledge to be applied to technology and contribute to society. Therefore, through creative chemical R&E research activities, they recognized that chemical knowledge (theories, concepts, etc.) is helpful in explaining surrounding phenomena, and a high favorable response rate was found in detailed factors such as ‘outcome,’ ‘laboratory,’ ‘visualization,’ etc. Science high school students selected the R&E class to understand the characteristics of each subject and to match the characteristics of the subject with their interests and areas of interest, and based on the understanding of the contents of the field, they wanted the results of their R&E inquiry activities to be combined with technology and contributed to society.
Exploration of Factors Influencing Self-regulated Learning Strategies and Latent Group Classification of University Freshmen's Adaptation to College Life through Latent Profile Analysis
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Kim Hee Eun , Lee Su Yeon
Published: March 2024

Objectives This study aimed to identify latent group types of college life adaptation among university freshmen and to analyze the factors of self-regulated learning strategies that influence each group type.
Methods In accordance with the research objectives, latent groups for types of college life adaptation were classified among 1,265 freshmen at A University located in the metropolitan area. Factors influencing each latent group regarding self-regulated learning strategies were identified. Responses from the Self-regulated Learning Test (SLT) were analyzed using latent profile analysis and multinomial logistic regression.
Results The analysis of freshman students' adaptation to college life revealed that they can be divided into three main groups: ‘Maladaptation’, ‘Marginal’, and ‘Adaptation’. Furthermore, among the various sub-elements of self-directed learning strategies, it was found that students with higher abilities in memory strategies, emotional regulation, and resource utilization are more likely to belong to the group that adapts well to college life. Notably, students with higher metacognitive abilities have a higher probability of belonging to the ‘Adaptation’ group, which shows the highest level of college life adaptation.
Conclusions These findings suggest the need to consider types of college life adaptation in understanding latent group profiles and predictive factors. By addressing variables of self-regulated learning strategies that influence college life adaptation, this study provides implications for necessary interventions to assist freshmen in adapting to college life.
Tras las huellas del silencio. Cuba y la España franquista, 1940-1958
Authors: Figueredo Cabrera Katia
Published: March 2024

Tras las huellas del silencio: Cuba y la España franquista, 1940-1958 devela una faceta poco explorada de las relaciones diplomáticas hispano-cubanas. Apoyado en una minuciosa revisión de la prensa, de las actas institucionales, de las declaraciones de los principales protagonistas y de las más variadas fuentes de archivo cubanas y españolas, Katia Figueredo Cabrera recrea las tensiones, los vaivenes y los tropiezos entre la siempre fiel isla de Cuba y su antigua Madre Patria en un período que se extiende desde el inicio de la Segunda Guerra Mundial hasta la huida de Fulgencio Batista del poder. Las complejidades de esta etapa son calzadas además con el análisis de los nexos económicos, la posición de la isla en los debates sobre el caso español en la ONU y los vínculos con el exilio republicano. Este último aspecto una muestra clara de la diplomacia dual practicada por los gobiernos cubanos hacia las dos Españas enfrentadas desde los días de la Guerra Civil española
Flood Mitigation Management Practice: A Comparison Between Stormwater Management Road Tunnel (SMART) and Sponge City Methods
Authors: Ahmad Arfah Juneena , Fairullazi Ayob Mohd
Published: March 2024

Flash flood in Malaysia urban is no longer a surprise incident as it has become a widespread natural disaster that frequently happened every year. The geographical of Malaysia with equatorial climate experiences consistently high temperatures with high relative humidity and influenced by the northeast and southwest monsoons have provided heavy rainfall during the monsoon season. Although the flood issue has been given an important focus under the disaster management implementation in Malaysia, there is critical demand to improve the present flood mitigation management practice to overcome unforeseen flood disaster issues over the long term. The annual occurrence of floods in Malaysia has caused a very big impacts to the lives of humans and other living beings that requires serious attention and better “solution alternative” measures in urban areas. Commentators have remarked that the current urban flood management method, i.e., Stormwater Management and Road Tunnel (SMART) has not been proven as the long-term best solution to overcome the unforeseen flood disaster issues over the long term. There have been suggestions from the scholars to explore and adopt a new method, i.e., Sponge City concept that is still scarce in Malaysia but has been substantially adopted in China to overcome the urban flood issues. Therefore, this paper is prepared to present the outcome of the study on the comparison between the present Stormwater Management and Road Tunnel (SMART) and the newly concept of Sponge City with specific reference to the urban flood mitigation management in Malaysia. This study employs a quantitative research strategy to collect primary data from fifty-eight (58) respondents that approximately represents 73% of the entire distributed questionnaires or a total of 80 potential respondents that was identified to meet the specified criteria, with the objective to get their opinions on the comparison between the two competing methods, i.e., the present SMART tunnel, and the newly Sponge City concept for urban flood mitigation management in Malaysia. The findings revealed that the majority of the respondents chose Sponge City because it is greater advantages than the SMART tunnel method to overcome the issues of flood disaster in the urban areas. Although the Sponge City concept could be deemed appropriate for consideration as the new and better flood mitigation management method in Malaysia, it demands a holistic assessment to view the relevancy of Sponge City implementation and its investment over the life span for achieving economic sustainability and Sustainable Development Goals (SDGs).
Dominant Factors Influencing the Implementation of Safety Protocols in Building Project Sites
Authors: Simeon Dele Roger , Soyingbe Aliu
Published: March 2024

Despite establishing extensive safety regulations and protocols, the construction sector finds it challenging to consistently uphold these norms. This study attempts to investigate the dominant factors influencing the implementation of safety protocols with a view to safeguarding the health and safety of workers while reducing the likelihood of accidents and guaranteeing the reliability and durability of built infrastructure. The study employed a cross-sectional research design and Lagos State served as the research area. The population of the study comprised built environment professionals and site operatives who were conveniently selected. The study utilized two sets of structured questionnaires that were self-administered to the two groups of respondents. Descriptive and inferential statistical approaches were employed to analyze the data collected. The findings revealed that the dominant factors influencing the implementation of safety protocols on building project sites among the built industry professionals and site operatives include management support, regulatory requirements, safety awareness, employee training and education, recognition and encouragement, workers’ attitudes, and penalties for non-compliance. The study concludes that regulatory requirement has a profound influence on how safety protocols are being implemented in building project sites. This implies that stringent adherence to regulatory requirements reduces risks and promotes a safety culture, which sustains the safety of building project sites. The study therefore recommends that the management of construction organizations should keep employees abreast of local safety requirements and provide guidelines for its implementation for compliance to be easily incorporated into building site operations. This may be accomplished by maintaining up-to-date information, performing frequent audits, and putting in place robust mechanisms aimed at guaranteeing compliance.
THINGS THAT MIGHT BE TRUE–Artistic Reflection
Authors: Ingrid Rundberg
Published: March 2024

My PhD project, ‘Things That Might Be True’, is based on Carl DiSalvo’s concept of adversarial design (DiSalvo 2012), which differentiates between ‘design for politics’ and ‘political design’. DiSalvo defines the former as design that simplifies and streamlines people’s electoral actions and interactions with municipalities, healthcare, and the government. ‘Political design’, on the other hand, sparks debate, problematises, and suggests new ways of exploring specific themes and concepts. DiSalvo’s concept is built on Chantal Mouffe’s distinction between ‘politics’ and ‘the political’.

I set out to question DiSalvo’s dichotomy. Through practical experiments, I expanded and processed adversarial design. My goal was to challenge the prevailing ideas in society on how citizens (should) connect with their inner political lives.

My project examined how visual communication design might help devise new methods and tools for the public to approach politics, and, by extension, expand the conversation about democracy on a personal as well as societal level. Through public engagement, dialogue, discussion, and introspection, I explored ways for citizens to listen to and connect with their inner political voice.

I conducted four participatory sub-projects: the lecture series ‘Things That Might Be True’; the Voices publication; the Inner Political Landscapes collage-making workshop; and the Political Confession workshop.

The findings of these four experiments led to the development and materialisation of a fictional new department: the Stemme Department. The department's activities display the artistic outcome of my PhD project and illustrate how people can come together to reflect and engage in dialogue with their political selves. In early March 2024, the Stemme Department’s activities were presented at Bergen Storsenter and Bergen Public Library during a four-day event, which included an exhibition, a workshop, and lectures.

My project expanded the dichotomy of adversarial design by suggesting the concept adopt an additional category: ‘political, political design’. Through an ambiguous and empathetic design practice, this additional category would mirror and borrow characteristics from both design for politics and ­political design.
Rozdysponowanie Własności Rolnej Skarbu Państwa w latach 1992–2009
Authors: Kraciński Paweł
Published: March 2024

W artykule przedstawiono sytuację Państwowych Gospodarstw Rolnych pod koniec lat 80. XX wieku, które wymagały szybkich reform w branży. Zasób ziemi nabyty przez APA scharakteryzowano liczbowo. Przeanalizowano proces zagospodarowania majątku rolnego Skarbu Państwa w latach 1992-2009. Przedstawiono stan zasobu na koniec 2009 roku i skomentowano proponowane zmiany prawne dotyczące Własności Rolnej Skarbu Państwa. (tlum. LW)
Synovial sarcoma of the hand - case report and literature review
Authors: Bjelan Sveto , Jovanovic Mladen , Tatalovic Vanja , Kecman Stefan
Published: March 2024

Introduction. Synovial sarcoma is a rare malignant tumor most often localized
on the lower limbs near large joints. Histopathology findings is the gold
standard for making the diagnosis. However, due to the similarity with other
tumors, the findings can be misinterpreted and the correct diagnosis often
delayed, and the treatment is inadequate in the early stages of the disease
inadequate. Case Report. A 15-year-old female patient came for an
examination due to subcutaneous lesion in her hand. The lesion was excised
on three occasions due to recurrence, and each time the histopathology
findings showed a dermatofibroma. After five years, the patient returned due
to the changes under the scar and unpleasant sensations. A surgical excision
was performed when dermatofibroma was verified. Two years later, the patient
developed necrosis of the entire finger. The finger was amputated, and
synovial sarcoma was verified. The patient underwent 25 cycles of
radiotherapy. In the following year and a half, the tumor developed
metastases, first locoregional and then distant, in the region of the left
shoulder joint and the left lung. Conclusion. The histopathological
similarity of this tumor with other benign changes indicates the need for
further evaluation and differentiation of the pathohistological
characteristics from tumors with similar characteristics. Early detection of
this type of tumor enables a more favorable course and outcome of the
treatment of these patients. Initial radical surgical treatment of this type
of tumor is necessary due to the aggressiveness they show and the high
frequency of local recurrence.
The importance of early diagnosis and treatment in patients with ankylosing spondylitis - case report
Authors: Jovicevic Predrag , Jovicevic Masa , Zivanovic Zeljko , Boskovic Ksenija , Kecman Stefan , Jovic Milana
Published: March 2024

Introduction. Ankylosing spondylitis is a common, chronic musculoskeletal
condition associated with substantial functional limitations. Inflammation
in later phases of the disease may lead to fibrosis and calcification of the
spine, causing poor quality of life. This case report emphasizes the
importance of early diagnosis of ankylosing spondylitis as one of the major
factors in further course of the disease. Case report. A 27-yearold man was
diagnosed with ankylosing spondylitis in 2019. He was first time examined in
2005 because of joint pain which was then characterized as growing pains.
Symptoms of joint pain reappeared approximately 10 years later, and were
present in lumbar and thoracic spine accompanied by morning stiffness. New
pain spots also appeared, as well as positive laboratory results regarding
inflammation. Despite the lasting diarrhea, additional tests such as
anti-smooth muscle and anti-mitochondrial antibody, Hepatitis B surface
Antigen and anti-Hepatitis C virus antibody test as well as stool test
results all turned out to be negative. The magnetic resonance imaging showed
edema of lower edges of the lumbosacral corpus, most likely as part of
spondylitis, changes to the sacroiliac joints in terms of chronic phase of
sacroiliitis with discrete activity, and right shoulder active synovitis.
The human lymphocyte antigen B27 testing showed positive results. Despite
the prescribed medical therapy, the disease activity remained high with
positive clinical presentation. This patient may be a candidate for
biological therapy. Conclusion. Early diagnosis and effective treatment
provide reduction of pain, fatigue and disease activity and also prevent
functional limitations, therefore improving the quality of life.
Construction and testing of small-scale thermoacoustic electricity generator with different heating power
Authors: Setiawan Ikhsan , Farikhah Irna , Rahmawati Anggi
Published: March 2024

The necessity of renewable energy is indispensable. Nowadays, researchers focus on converting waste or solar heat into advantageous energy, such as electric energy, using thermoacoustic scientific knowledge. The thermoacoustic machine converts the heat energy into sound energy and conversely. Then, using a linear alternator, it converts into electric energy. In this study, we focus on the construction and testing of small-scale thermoacoustic electricity generators with different heating temperatures. The heat is converted into acoustic energy employing the thermoacoustic engine, and the acoustic energy is converted into electrical energy using the linear alternator. In this investigation, the heating power varies from 226-389 W. The result shows that 32.2 mW of electricity was found as the thermal power at 389 W. Moreover, the onset heating temperature span is 316?C.
Transient phenomena and their consideration in load-following control of nuclear power plants
Authors: Szentannai Pal , Szucs Tibor , Pudleiner Balint , Fekete Tamas
Published: March 2024

Radical changes have been happening on the source side of the electricity system due to the rolling back of large-sized fossil-fueled power plants and the coming to the front of uncontrollable renewables. As a worldwide consequence, to ensure the permanent balance of the grid, even big-sized units have to be operated in load-following mode, including also nuclear power plants. This mode is conducted by the control system, which must also consider the side effects of this rather dynamic operating mode. In this report, we show up all components of such a control system, including the process model, structural integrity assessment, and control algorithm. All the aforementioned elements are discussed on the basis of a concrete example, and the resulting control behavior of the entire system is also shown. The results demonstrated that a significant reduction in the caused thermal stresses could be achieved while keeping the control quality practically unchanged.
Integrated testing of electric vehicle thermal management and optimization of flow field uniformity in air supply system
Authors: Fu Yu , Min Haitao , Sun Weiyi , Fang Yang
Published: March 2024

To meet the requirements of integrated testing and performance calibration for the early development of electric vehicle thermal management, this paper conducted research on the configuration scheme design of the electric vehicle thermal management integrated testing platform and simulation and optimization of the air supply system flow field. Firstly, a requirement analysis of the testing environment and the overall design of the testing platform was performed. Secondly, simulation techniques were applied to optimize the uniformity of the intake air-flow field in the test section, which was then validated through real testing. Finally, a comparative study of the tested system was conducted through CFD simulations in two different environments, the testing platform and the actual vehicle underhood. The results indicate that the intake air-flow field uniformity in the test section falls within ?3%. The intake flow rate errors for the radiator and condenser, compared to those in the actual vehicle, were found to be 0.039% and 2.116%, respectively. These findings confirm that the testing platform offers good consistency with the flow field in real vehicle testing scenarios.
Assessing the properties of Miscanthus x Giganteus under varying levels of ash fertilization treatment and regression neural network insight into calorific value
Authors: Brandic Ivan , Pezo Lato , Voca Neven , Leto Josip , Suric Jona , Peter Anamarija , Bilandzija Nikola
Published: March 2024

The aim of the study was to investigate the changes in ultimate, proximate
analysis and calorific properties of Miscanthus x Giganteus with three types
of planting materials (two rhizomes - R1 and R2 - and one seedling - S) and
three ash fertiliser treatments (P0, P2, and P5) were included in the study.
The research further examined their effects on crop yield, stem height and
various chemical properties. The results showed that the maximum yield was
obtained with the R1 x P2 plant type, while the minimum yield was recorded
with the R2 x P2 plant type. In addition, the greatest average stem height
(3.34 m) was recorded for the R2 x P5 plant type. Significant differences
were also found in the chemical components between the plant types and
treatments. For example, the highest ash content of 2.25% was found in plant
type 'S' x P5, while the highest coke content of 14.48 % was found in plant
type R1 x P5. The statistical analysis confirmed that planting material and
ash fertilisation had significant influence on the physicochemical
properties of Miscanthus x Giganteus. This consequently affects the
calorific value, with the average higher and lower heating value being 18.32
and 17.04 MJ/kg, respectively. The neural regression network models showed
robust predictive performance for the higher (HHV) and lower heating value
LHV, with low chi-square values (?2) and high coefficients of determination
(R2).
Study on the characteristics of molten salt heat storage in the fast peak regulation of coal-fired power unit
Authors: Zhang Xiangyu , Ma Zhaoyao , Wen Hainan , Yang Zhenshuai , Liu Hui
Published: March 2024

The load variation rate of the coal-fired power unit in China is generally around 2%, and the new technology is needed to further improve the load variation rate and to increase the peak regulation benefits. In this paper, the molten salt is utilized to constructed the ?Carnot battery? based on the coal-fired power unit, in order to increase the load variation rate of the coal-fire power units, and the regulatory characteristics of the molten salt system during load variation processes and the coupling characteristics with the boiler and turbine are investigated. The results indicate that, the load variation rate in the 20-100% load can be improved to 6% Pe per minute for a 300 MW coal-fired power unit when molten salt system with power of 301 MW and thermal storage duration of 83.6 MWh is coupled, in which the maximum molten salt temperature is, and the steam produced by molten salt is added into the low pressure cylinder of turbine. The average power generation efficiency of the ?Carnot battery? constructed by the boiler and molten salt during the variable load regulation process is 38.72%, and the average power generation efficiency of the molten salt system is 24.57%. This study indicates that the small-scale molten salt systems can be used to improve the load variation rate of the coal-fired power units.
ANALYSIS OF ADHESIVE WEAR BEHAVIOR OF STELLITE-COATED VALVE SURFACES AT ROOM TEMPERATURE AND 300 0C BY FUZZY LOGIC METHOD
Authors: ARABACI Uğur
Published: March 2024

In this study, 1.4718 coded steel surface, which is used especially in the manufacture of automotive valves, is coated with cobalt-based Stellite 1, Stellite F, Stellite 6, and Nickel 60 alloys by the TIG welding method. The samples coated with the specified welding parameters were abraded for 4400 meters on a metal abrasive disc under 10, 25, and 40 N loads, at room temperature and 300 0C. The weight losses of the samples were measured every 1100 meters, and their wear resistance was investigated. It has been determined that the experimental study results and fuzzy logic estimations overlap with each other, and fuzzy logic estimations can be used to determine the wear behavior in the intermediate values that were not tested.
Her Eş-sonlu Genişlemesinde Zayıf Rad-tümleyene Sahip Modüller
Authors: ÖNAL KIR Emine , ÇALIŞICI Hamza
Published: March 2024

Bu çalışmada, (CWE) ve (CWEE) özelliğine sahip modüllerin bir genelleştirilişi olarak (CWRE) ve (CWREE) özelliğine sahip modülleri tanımlıyoruz. R bir halka ve M sol R-modül olsun. Eğer M (CWRE) özelliğine sahip ise, M modülünün her direkt toplam terimi (CWRE) özelliğine sahiptir. Bir R halkasının yarıyerel olması için gerek ve yeter şart her sol R-modülün (CWRE) özelliğine sahip olmasıdır. Ayrıca (WRE*) ve (WREE*) özelliğine sahip modülleri çalışıyoruz. Bir modülün (WREE*) özelliğine sahip olması için gerek ve yeter şart onun her alt modülünün (WRE*) özelliğine sahip olmasıdır.
Estudio sobre la percepción visual de portadas de la revista RETO durante los periodos 2012-2021
Authors: Aranguren-Corredor Julián Felipe
Published: March 2024

El presente artículo describe los resultados de una investigación mixta realizada en el primer semestre de 2023, en el Centro de Gestión de Mercados, Logística y Tecnologías de la Información (CGMLTI) del Sena Regional Distrito Capital, sobre la percepción visual generada por el diseño gráfico de las portadas de la Revista Reto a partir de 2020, en la comunidad académica. Para la recolección de los datos e información se diseñaron dos instrumentos, uno cuantitativo y otro cualitativo, aplicados a los participantes para cada una de las ocho portadas del periodo entre 2012 a 2021. Los análisis de datos cuantitativos y la interpretación de la información cualitativa evidencian en términos generales que los cambios en las ilustraciones y en el arte de la revista tuvieron un impacto positivo en 2020.
Anyflip-Assisted E-Book to Enhancing Elementary School Students' Motivation
Authors: Permata Azrina , Zulherman
Published: March 2024

Appropriate learning media must be developed to boost students' learning motivation and conceptual comprehension. E-books are required as a form of instructional media to present subject-related content with student-workable evaluation questions. The primary objective of the research and development of this Anyflip-assisted e-book is to enhance student motivation. The study employs the ADDIE model, which comprises five stages: Analysis, Design, Development, Implementation, and Evaluation. The research data was collected through observation methods and administering a questionnaire, followed by a pre-test and a post-test. The study participants comprised 64 elementary school students in the fifth grade in two elementary School. The present investigation employs N-Gain Score analysis to assess the efficacy of anyflip-assisted e-books in enhancing student motivation. Additionally, the study aims to determine distinctions between the experimental and control classes by utilizing the T-test and the One Group Pre-test and Post-test Design. The study's findings indicate that the e-book development process is highly efficacious. This Anyflip-assisted e-book learning medium is feasible and can potentially enhance student motivation, particularly among fifth-grade elementary school students.
The Influence of Self-Efficacy on Metacognition Skills of High Grade Students
Authors: Duratun Asri Dwi , Maryani Ika
Published: March 2024

Self-efficacy and metacognition skills are two essential variables in achieving learning goals. However, the correlation between the two variables has yet to be discovered. This study aims to analyze and describe the significant effect of self-efficacy on the metacognition skills of high-class elementary school students. A quantitative research method with an ex-post facto or causal-comparative approach was used in this study. The study population was 88 students, and the sample was 72 students. Data were collected using questionnaires and documentation studies. Data analysis techniques used descriptive statistics and simple linear regression. Based on the results of the analysis, it is obtained that the hypothesis test states that there is a positive and significant correlation between self-efficacy and metacognition skills in high-class elementary school students through the Pearson correlation test, a significance value of 0.00 is obtained, which means it is smaller than 0.05, namely 0.00 <0.05, with a positive correlation of 0.784. So that when viewed from the existing degree guidelines, the Pearson correlation is strongly correlated. The obtained value of 10.573 means more significant than the t table value of 1.66629, namely 10.573 > 1.66629, with the acquisition of the regression equation Y = 12.822 + 0.713, which implies that self-efficacy is positively correlated with students' metacognition skills. So self-efficacy affects metacognition skills.