bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengaruh Metode Latihan Plyometric Vertical, Horizontal dan Kekuatan Otot Perut Terhadap Peningkatan Lompat Jauh di Kabupaten Kendal
Authors: Salamah Dina Yuni
Published: September 2023

The coaching is carried out routinely and structured, with the methods applied by the coach, the results of initial observations show that the jumps of PASI athletes in Kendal Regency, 8 athletes have 4 meters jumps and 11 athletes have less than 4 meters jumps. Therefore, programmed training is needed to improve the jumping ability of PASI athletes in Kendal Regency. The purpose of this study was to determine the effect of vertical, horizontal plyometric training methods and abdominal muscle strength on increasing the long jump in Kendal Regency. The sample in this study were 20 athletes from PASI Kendal Regency. The sampling technique used was total sampling technique while the data analysis technique used was statistical analysis technique using SPSS data statistical analysis assistance. The result of increasing the plyometric training method is 5.63% lower than the result of increasing the abdominal muscle strengthening exercise of 11.52%.

The coaching is carried out routinely and structured, with the methods applied by the coach, the results of initial observations show that the jumps of PASI athletes in Kendal Regency, 8 athletes have 4 meters jumps and 11 athletes have less than 4 meters jumps. Therefore, programmed training is needed to improve the jumping ability of PASI athletes in Kendal Regency. The purpose of this study was to determine the effect of vertical, horizontal plyometric training methods and abdominal muscle strength on increasing the long jump in Kendal Regency. The sample in this study were 20 athletes from PASI Kendal Regency. The sampling technique used was total sampling technique while the data analysis technique used was statistical analysis technique using SPSS data statistical analysis assistance. The result of increasing the plyometric training method is 5.63% lower than the result of increasing the abdominal muscle strengthening exercise of 11.52%.
Pola Pembinaan Usia Dini pada Klub-Klub Bola Basket di Kabupaten Temanggung
Authors: Fakhri Syahrindra , Hartono Mugiyo
Published: September 2023

The purpose of this study was to determine the Achievement Development and Early Childhood Development Patterns in Basketball Clubs in Temanggung Regency in 2020. This study used a descriptive quantitative research approach. The results of the study show that according to the indicators of infrastructure for achievement development are in the poor category, organizational indicators for achievement development are in the medium category, environmental indicators for achievement development are in the medium category, management indicators for achievement development are in the medium category and funding indicators for coaching achievement is in the medium category. The results showed that according to the physical indicators the majority of respondents were in the good category, and the mental aspect indicators of the majority of the respondents were in the good category. Based on the results of the study, it can be concluded that the development of achievement in basketball clubs in Temanggung Regency in 2020 consists of facilities and infrastructure that are in the less category, organizations that are in the medium category, the environment which is in the medium category, management which is in the middle category. moderate, and funding is in the medium category and the physical aspect is in the good category, the mental aspect is in the good category and the social aspect is in the good category
Survey Manajemen Pembinaan Prestasi Cabang Olahraga Atletik di Kabupaten Kebumen
Authors: Badarudin Muhammad , Rustriadi Tri
Published: September 2023

The purpose of this Study is to analyze the stages of the development achievements of the athletes PASI Kebumen on (1) Organization, (2) the Implementation of Coaching (3) Human Resources, (4)) the implementation of the exercise program , (5) facilities and infrastructure, (6) funding, and (7) the achievement data. The research method using descriptive qualitative. Method of data collection by observation, interview, and documentation. The subject of this research is to the board, coaches, and athletes. The data analysis technique used is the technique of triangulation of data. Data analysis with data collection, data reduction, data presentation, and conclusion of the data. The research results obtained, namely (1) the organization is structured, but in execution is not good, (2) the implementation of the coaching already organized and pretty good, (3) human resources ranging from the coach and the athlete is good enough, (4) exercise program that is made is good enough, (5) facilities and infrastructure owned inadequate and not standard, (6) funding obtained from the grant funds Kabupaten Kebumen, and (7) the achievements increased and continue to increase the bias is arguably already better.
Pengembangan Instrumen Penilaian Afektif Berbasis Problem Based Learning Sebagai Upaya Preventif Darurat Narkoba Pada Siswa SMA Negeri 15 Semarang
Authors: Mazhiar SM Jhovanka Anjar , Yuwono Cahyo
Published: September 2023

Education plays a very important role in building the character of teenagers to be more aware of the dangers of drugs. Moreover, the implementation of the 2013 curriculum emphasizes building a strong character for each student. This is based on the many occurrences of deterioration of the nation's character which can be seen from the many acts of corruption, violence, drug abuse and other actions. This is what underlies this research as an emergency drug prevention effort in adolescents, especially high school students. The development of assessment instruments using R & D according to Sugiyono. The attitude assessment instrument developed is used as a solution and can be used as an alternative for teachers in conducting the process of assessing adolescent attitudes towards drug emergencies in accordance with the 2013 Curriculum. The object of research data sources are students of class XI.IPS.1 and class XI.IPA.2 SMAN 15 Semarang , the data were obtained through the validity and reliability of the attitude assessment observation sheet, the process of developing an instrument for assessing honesty, discipline, responsibility and caring for drug emergencies each consisting of 4 indicators, the assessment instrument was valid according to 2 (two) validators in the curriculum and field of study. learning evaluation. The assessment instrument is said to be effective/successful, because the results of the instrument reliability analysis produce an r table value of 0.9997 for all subjects, this number exceeds the r coefficient value of the benchmark value of (0.6). This assessment instrument is good to use to provide students with objective views and attitudes in highlighting the dangers of drugs to stay away from their abuse.
A Comparative Study of Basic Science Process Skills of Science Students at Higher Secondary Level in District Rawalpindi, Pakistan
Authors: Ahmed M. , Choudhary F. R. , Sultan S.
Published: September 2023

Science process skills (SPS) had a pivotal role in scientific investigation. SPS are very important to be developed in science learning because with the help of SPS students develop their thoughts to make discoveries using scientific investigation. In the 21st century SPS are needed in science learning. In Pakistan results of many studies showed that private sector institutes’ students were performing better than the public sector institutes’ students in the subject of science. Better performance in science is only possible when students have a high level of science process skills. The main purpose of this study was to determine students’ level of performance on basic science process skill and to compare the performance of public and private school Physics students in science process skills at the H.S.S.C. level. A Simple comparative research design was used to compare the skill level of students. In the present study four aspects, of basic science process skills (Observation, Communication, Measurement, and Relationship) were observed. Through purposive sampling technique two top-level colleges, one from the public school system and one from the private school system of the city of Rawalpindi, were selected for the study. For data collection researcher used an observation sheet and worksheet based on four experiments of physics at higher secondary school certificate level. Measurement of SPS was done when students were performing experiments in practical labs. t-test was employed to compare the performance of public and private school students.  The result of the research stated that there was a significant difference in basic science process skills of public and private school physics students at the H.S.S.C level. The mean score of performance of public and private school students was observed to be good in the aspects of observation and relationship skills but still teachers need to improve the performance of students in the aspects of communication and measurement skills. Further it is recommended that exam system may give more weightage to science process skills so that students and teacher of science subjects may be able to concentrate more on this aspect of learning.
Effect of E-Readiness Skills, Metacognitive Awareness, and Biological Literacy on the High School Students' Misconceptions
Authors: Jamaluddin J. , Jufri A. W. , Ramdani A.
Published: September 2023

This study aims to determine the effect of e-readiness skills, metacognitive awareness, and biological literacy on students’ misconceptions about the ecosystem concept. This type of research is quantitative descriptive with a survey method. The research subjects were 182 West Lombok high school students Regency. Data collection used an e-readiness questionnaire, MAI inventory, and a biological literacy test combined with the CRI method. Data analysis used descriptive analysis techniques and multiple regression analysis. The data analysis using multiple regression analysis with the help of the SPSS 26 program obtained the following results: partial multiple linear regression analysis found that e-readiness skills (sig. 0.0000.05) and biological literacy (sig. 0.0070.05) have a significant effect on students’ misconceptions, while metacognitive awareness (sig 0.0880.05) does not affect students’ misconceptions. This study concluded that partially e-readiness skills and biological literacy had a significant effect on students’ misconceptions, while metacognitive awareness had no significant effect on students’ misconceptions. Simultaneously, e-readiness skills, metacognitive awareness, and biological literacy positively affect high school students’ misconceptions about the ecosystem concept. Biology teachers are expected to pay attention to efforts to improve e-readiness skills, metacognitive awareness, and students’ biology literacy to minimize their misconceptions about biology concepts in high school.
The Connection between Students' Retention and Critical Thinking Skills in Diverse Academic Skills in Biology Learning
Authors: Danil M. , Corebima A. D. , Mahanal S. , Ibrohim I.
Published: September 2023

This research aims to investigate the connection between students’ retention and critical thinking skills in diverse academic skills in biology learning. The research samples were 202 tenth-grade students in the second semester who learned biology. A class equivalence test determined four high and four low academic skills classes. An essay test was employed in this study to examine retention and critical thinking skills. The study indicates a significant connection between students’ retention and critical thinking skills in various academic skills in high school biology learning. High academic skills have a lower contribution of critical thinking skills to retention than low academic skills. Students’ less serious learning attitudes and practices give a low contribution of critical thinking skills to retention in high academic skills. The regression equation lines between students’ retention and critical thinking skills in diverse academic skills are not parallel and do not coincide. The regression equation line for low academic skills seems steeper than that for high ones. It means that students’ retention improvement rate due to the influence of critical thinking skills in high academic skills is lower than in low academic skills.
Introducing CAPAB(L)E: A Learning Model to Promote Prospective Biology Teacher’s Entrepreneurship Skills
Authors: Supriatno B. , Kusumawaty D. , Tallei T. E. , Emran T. B. , Suwandi T.
Published: September 2023

Biology is one of the fields of study that has a lot of scopes that have the potential to be directed to the entrepreneurship aspect. Currently, there is no report on a particular learning model that prepares prospective teachers to design and implement businesses related to the use of biological principles, processes, and products. This study aims to develop and validate an entrepreneur-oriented learning model of biology in higher education, later known as CAPAB(L)E. CAPAB(L)E, stands for Characterizing, Analyzing, Prototyping, Assessing, Building up, and Exposing, a bioentrepreneurship learning model to promote biology education students’ entrepreneurial skills was successfully designed through this research. This design-based research (DBR) used the ADDIE model, which consisted of five stages, namely: analysis, design, development, implementation, and evaluation. The logical validation sheet consisted of six objective items with four Likert scales and an open question regarding recommendations for improving the developed learning model filled by two validators or experts (a lecturer in biology learning design and a lecturer in entrepreneurship). In addition, to obtain an overview of students’ perceptions of the CAPAB(L)E learning model, a questionnaire was used containing six items of Likert Scale 4-level statements and an open question about skills that were most trained during learning. Research data were analyzed descriptively. The results of the logical validation of the hypothetical model of CAPAB(L)E bioentrepreneurship learning model indicate that the learning model is valid and can be implemented, with a score of 81,25%. The students’ perceptions are generally positive on the structure and content of the material. Students suggest using teamwork strategies in planning and implementing student businesses. Based on this research results, it is necessary to carry out further research to determine the effectiveness of CAPAB(L)E bioentrepreneurship learning on students’ skills, knowledge, and attitudes toward entrepreneurship.
Enhance The Understanding in Periodic Table of Element Using Crossword Puzzles among Form 4 Students
Authors: Rahayu N. F. A. , Ibrahim N. H. , Surif J.
Published: September 2023

In this study, the researcher aimed to identify students’ level of understanding of the Periodic Table of Elements before and after using the crossword puzzles called Chem-PTE crossword puzzles. The quantitative approach was used as the methodology of this research and a pre-experimental base was applied to one group as the research design. 25 students were purposely selected as the respondents. The study started with a pre-test, followed by the implementation of Chem-PTE crossword puzzles for 3 lessons and subsequently ended with a post-test. Then, students’ achievement scores in both, pre-test and post-tests, were analysed with descriptive analysis and paired samples t-test by using SPSS software version 24.0. The analyses were conducted to obtain the mean values for both the pre-test and post-test and next to test whether there was a statistically significant difference before (pre-test) and after (post-test) using the Chem-PTE crossword puzzles. Furthermore, this research also examined students’ perspectives on the effectiveness of Chem-PTE crossword puzzles by using questionnaires. Overall, the findings showed that the use of Chem-PTE crossword puzzles had improved students’ level of understanding as there was an increase in students’ achievement scores in the post-test compared with students’ achievement scores in the pre-test. Subsequently, the paired sample t-test analysis also revealed statistically significant differences before (pre-test) and after (post-test) the use of Chem-PTE crossword puzzles. Lastly, almost all of the students provided positive feedback on the effectiveness of the Chem-PTE crossword puzzles in enhancing students’ understanding of the topic Periodic Table of Elements.
Physics Argumentation-Based Computer-Supported Collaborative Hybrid Learning to Increase Concept Mastery and Argumentation Skills
Authors: Murdani E. , Suhandi A. , Muslim M. , Setiawan A. , Samsudin A. , Costu B.
Published: September 2023

This study aims to increase the level of concept mastery and argumentation of senior high school students in Singkawang City, West Kalimantan Province, Indonesia. The Physics Argumentation-Based Computer-Supported Collaborative Hybrid Learning (PABCSCHL) model in Socio-Scientific Issues (SSI) especially on the topic of the forest fire on the peatlands has been developed with good validation categories by three pedagogical validators and three assessment validators and been implemented to 200 students. Their argumentation skill levels are measured based on Toulmin Argumentation Pattern. The syntax of the PABCSCHL model is Reading (online), Concept Building, Discussing and Debating (offline), Experiment Designing (online), and Experiment Doing (offline). The core of this model is student collaboration in arguing, debating, and experimenting. From this research, most student solution to anticipate the fire forest on peatlands is burning and waiting until the fire is extinguished perfectly (70 students), monitoring periodically that the fire is completely extinguished (60 students), and limiting the burned area by digging trenches around the site (50 students). Student solutions describe students’ understanding of solving problems posed in group discussion sessions and debates and prove their arguments with experimental data. Before implementing the model, no student has the highest level of argumentation and concept mastery. After that, 23 students have the highest level of concept mastery, and 25 students have the highest level of argumentation. The PABCSCHL model can increase the level of concept mastery and argumentation skills. This model is a new alternative hybrid learning in the post COVID-19 pandemic. Many more SSI can be learning topics to be implemented in this model.
Ethnochemistry Potential of Vines Contained in Lontar Usada Taru Pramana on Students’ Scientific Explanation Skills through Task-Based Learning
Authors: Wiratma I. G. L. , Yuliamiastuti I. A.  A.
Published: September 2023

This research focuses on the analysis of the ethnochemistry potential of the vines contained in the Lontar Usada Taru Pramana. Lontar Usada Taru Pramana is a note written on palm leaves about plants that are useful as medicines used as a reference for traditional Balinese medicine. This study aims to analyze the effectiveness of task-based learning that utilizes the ethnochemistry potential of vines contained in Lontar Usada Taru Pramana, on students’ scientific explanations skills. This research was conducted during the post-Covid-19 period in vocational and high schools with 234 students. This research was quantitative and applied The One-Group Pretest-Posttest Design with replication where there was no control class and all research subjects were given the same treatment. Task instructions were passed through pre-task, process task, and post-task. The type of task in learning is to make scientific studies of ethnochemistry by sharing personal experiences and solving problems. The data collection technique used tests as descriptive essay questions to measure students’ scientific explanation skills on some materials in booklets of Taru Pramana Lontar. The tests in this study described several components: plant classification, chemical content, benefits and methods of concocting it as medicine, and the scientific version of the Lontar Usada Taru Pramana composition. The effectiveness of task-based learning was analyzed using the N-Gain and T-test. The results of this study indicate that giving assignments based on Lontar Usada Taru Pramana in chemistry learning is effective in increasing students’ ability to explain the scientific study of vines as medicine. The N-gain results are in the high category of 0.76 for vocational students and 0.72 for high school students. While the T-test result shows that there is a significant difference between students’ pretest and posttest results in both vocational school and high school with a significance of .01. Students tend to correctly give scientific explanations to the plants they often encounter. This study shows that the ethnochemistry potential of the vines on Lontar Usada Taru Pramana can improve students’ scientific explanation skills. This study recommends elaborating chemistry concepts in the preservation of cultural heritage through transferring knowledge on using traditional and modern medicinal plants and their development in research.
The Pattern of Physics Education Students’ Diagrams and Answers in Solving Force Problems
Authors: Sirait J. , Ainley J. , Barstow M.
Published: September 2023

Force diagrams or some say free body diagrams (FBDs), as physics representations, are usually employed to teach and learn physics concepts such as force. Physics education studies indicate that the use of FBDs can support or hinder students’ performance in solving physics problems. This study aims to investigate the type of representations drawn by students and the patterns of students’ answers while solving force problems. By involving 230 preservice physics teachers, questions about the application of Newton’s laws were administered to students to elicit the patterns of students’ diagrams and answers. Results were analysed into three categories: complete, incomplete, and inappropriate force diagrams. In addition, some students did not draw diagrams in solving the problems. Based on students’ answers, the percentage of students drawing incomplete diagrams (54% for horizontal problems and 42% for inclined problems) is higher than drawing complete diagrams (18% for horizontal problems and 35% for inclined problems). The percentage of students who drew inappropriate diagrams in solving horizontal and inclined problems is 20% and 10%, respectively. A few students (8% and 13%) did not draw diagrams for both questions. Students who drew complete diagrams tended to obtain the correct final answer. Some students who drew incomplete diagrams were not able to find the correct answers and even finish the problem. However, some students who drew incomplete diagrams could successfully solve the problem. The group of students who drew diagrams in the inappropriate category tended to demonstrate incorrect and unfinished answers. This study suggests that instructors should not only focus on the correctness of the diagrams but also focus on the completeness of diagrams drawn by students while solving the problems.
Project-Based Learning Via Traditional Game in Physics Learning: Its Impact on Critical Thinking, Creative Thinking, and Collaborative Skills
Authors: Khoiri N. , Ristanto S. , Kurniawan A. F.
Published: September 2023

This study aims to investigate how PjBL via traditional games impact students’ critical thinking, creative thinking, and collaborative skills. The research sample is a local school in Semarang. The research design was a quantitative study using the pre-experimental design type one group pretest-posttest method. There is only one predetermined group in this design. The theme of the game that the project will create was revealed following the pre-test. The research results show students’ creative thinking skills in applying the PjBL model via game techniques are 61.53% in high criteria and 38.46% in medium criteria. The study results also show a fair increase in the N-Gain value for the four indicators of creative thinking skills: improvisation, elaboration, creativity, vision, effectiveness, and efficiency. The results show it is effective for six students (25%), fairly effective for 13 students (54.16%), and less effective for five students (20.83%). The study’s results also show that the Mann-Whitney U statistical test is 69. It means that the PjBL model impacts students’ collaborative skills. This research has a big impact on increasing students’ creative thinking skills and collaboration.
Implementation the Ethnoscience-Based Smart Module to Improve Students’ Patriotism
Authors: Ardianti S. D. , Wanabuliandari S. , Tanghal A. B.
Published: September 2023

Patriotism begins to fade in the younger generation of Indonesians. The loss of patriotism will cause concern for the nation. Thus, there must be innovation in teaching to cultivate patriotism. The ethnoscience-based smart module helps students learn independently in a fun way and contributes to improving their patriotism. This study aims to analyze the improvement of students’ patriotism through implementing the ethnoscience-based smart module. This research used the research and development (R D) model by Borg and Gall. The research and development stages of ethnoscience-based smart modules included preliminary research, product development and validation, and product testing. The study was conducted in three primary schools in Kudus. The research design used in this study was a single-group pretest and posttest design. The data were analyzed using the N-gain test to determine the improvement of students’ patriotism. The results of the N-gain test show an increase in patriotism, with an average initial score of 50 increasing to an average final score of 80, and classically, the normalized gain value is 60% or 0.60, which means an increase in the medium category through the application of the ethnoscience-based smart module. Based on research results, it can be concluded that implementing an ethnoscience-based smart module can improve students’ patriotism in elementary schools.
Design, Development, and Evaluation of DivTCell App: Gamifying Eukaryotic Cell Division and its Effects on Academic Achievement
Authors: Mantilla S. A. A. , Macababat L. A. , Nasayao R. D. S. , Walag A. M. P.
Published: September 2023

Due to the increasing popularity of digital games, educators worldwide have grown interested in designing and developing gamified learning systems to facilitate learning. The study utilized a design and development research design to develop a gamified learning app, DivTCell, to teach eukaryotic cell division to high school students. The application was designed based on suggestions from science teachers and emerging themes in the literature. It was then evaluated by science teachers using an application evaluation rubric. The DivTCell was implemented in one in-tact class to examine its effects in improving students’ academic achievement. Results from the evaluation show that the application have accurate concepts, accessible, and functional. Similarly, improvements in academic achievement were also noted after the implementation of the app as shown in the significant difference in the scores for the pretest (M=26.80, SD=2.32) and posttest (M=30.76, SD=2.44) conditions; t(45)= -8.49, p = 0.00. Effect size was also calculated at d=1.25, indicating high practical significance. Game elements such as badges, leaderboards, challenges, and autonomy are essential in motivating students to learn. These results demonstrate that when end users are in mind in developing a gamified learning system that positively affects students’ academic achievement.
Biodiversity of Drosophila sp. from the Natural Environment based on the Cytochrome Oxidase subunit 1 Gene
Authors: Wurarah M. , Mokosuli Y. S. , Sumampouw H. M.
Published: September 2023

Research on insect phylogenetics is intricated by their similar morphology and significant genetic diversity. The cytochrome oxidase subunit 1 (CO1) gene is the most widely utilized mitochondrial DNA gene in the identification and study of animal molecular biodiversity. This study aims to identify and reconstruct the phylogeny of fruit flies from North Sulawesi using the cytochrome oxidase subunit 1 (CO1) gene. Fruit flies were obtained from 5 (five) areas in North Sulawesi, namely Siau (L1), North Minahasa (L2), Minahasa (L3), Southeast Minahasa (L4), and Bolaang Mongondow (L5). Fruit fly imago limbs were used as a tissue source for genomic DNA extraction. Genomic DNA extraction was carried out using the Quick-DNA™ Miniprep Kit manufacture protocol. The CO1 gene amplification was carried out by the PCR method, and the visualization of the amplicons was carried out by the 1.5% gel electrophoresis method. Nucleotide sequencing used a sequencing service at First BASE Singapore with a bidirectional sequencing method. CO1 gene amplification of each sample was visualized at 690 bp to 702 bp length. After analyzing the CO1 gene concession area using the MEGA XI program, it is found that Drosophila at L1 has 702 bp, L2 has 703 bp, L3 has 698 bp, L4 has 700 bp, and L5 has 697 bp. Based on alignment analysis using the BLAST method, it is found that the L1 fruit fly has a similarity rate of 99.29% (E=0.0) to Drosophila parapallidosa [MK659836.1]. The L2 fruit fly also has a similarity rate of 96.86% with Drosophila parapallidosa [MK659836.1]. The L3 fruit fly has a similarity level of 94.94% with Drosophila parapallidosa [MK659836.1]. The L4 fruit fly has a similarity rate of 94.43% with Drosophila parapallidosa [MK659836.1]. However, the L5 fruit fly shows a similarity rate of 96.86% with Drosophila rubida [EU493593.1]. The reconstruction results with the MEGA XI program using the Minimum Evolution model obtain two monophyletic groups where the fruit fly in Bolaang Mongondow is in a monophyletic group different from other fruit flies. The results of this study prove the variation in fruit fly species in North Sulawesi based on the identification of the CO1 gene.
Differences in the Triplechem Learning Model with Balinese Local Wisdom and the Discovery Learning Model in Influencing Students' Visual Literacy and Mental Models about Acid-Base Solutions
Authors: Suja I. W. , Jayadiningrat I. M. G. , Ardiyasa I. N. S.
Published: September 2023

This study intends to investigate the differences in the effect of the TripleChem learning model with Balinese local wisdom and the Discovery Learning model on students' visual literacy and chemical mental models about acid-base solutions. The research was designed using a quantitative approach and classified as quasi-experimental. The research design used was a pretest-posttest non-equivalent control group design. The population of this study was 206 junior high school students with Balinese cultural backgrounds with various beliefs (religions), namely Hindus, Muslims, and Christians. Cultural content will cause learning to be more contextual, more interesting, and bring students closer to their own culture. The sampling was done using a simple random sampling technique, and obtained two sample classes, one class as the experimental group, and the other as the control group.  The experimental group was taught using the TripleChem learning model containing Balinese local wisdom, while the control group was taught using the Discovery Learning model. The dependent variable in this research was visual literacy and students' mental models of chemistry. Data collection was carried out using a visual literacy test (10 items in total; item validity between 0.520 – 0.893; and test reliability coefficient of 0.895) and a chemical mental model test (8 items in total; item validity between 0.669 – 0.878; and test reliability coefficient of 0.922). Data analysis was carried out descriptively and MANCOVA. The results show that the TripleChem learning model is more effective to be applied to improve students' visual literacy and mental models about acid-base solutions compared to the Discovery Learning model. This condition is caused by the syntax of the TripleChem learning model which is more sequential and structured to build students' visual literacy and chemistry mental models. The application of the TripleChem learning model in chemistry learning needs to be supported by laboratory facilities to display chemical macroscopic phenomena and animated media to explain these phenomena at the level of matter particles.
Some remarks on spectrum of nonlinear continuous operators
Authors: Soltanov K.N.
Published: September 2023

In this article, the existence of the spectrum (the eigenvalues) for the nonlinear continuous operators acting in the Banach spaces is investigated. For the study this question it is used a different approach that allows the studying of all eigenvalues of a nonlinear operator relative to another nonlinear operator. Here we show that in nonlinear operators case it is necessary to seek the spectrum of the given nonlinear operator relative to another nonlinear operator satisfying certain conditions. The different examples, for which eigenvalues can be found, are provided. Moreover, the nonlinear problems including parameters are studied.
Characterizing Riesz bases via biorthogonal Bessel sequences
Authors: Zikkos E.
Published: September 2023

Recently D.T. Stoeva proved that if two Bessel sequences in a separable Hilbert space $\mathcal H$ are biorthogonal and one of them is complete in $\mathcal H$, then both sequences are Riesz bases for $\mathcal H$. This improves a well known result where completeness is assumed on both sequences.

In this note we present an alternative proof of Stoeva's result which is quite short and elementary, based on the notion of Riesz-Fischer sequences.
Operacje w zespole Polanda – analiza własnych doświadczeń
Authors: Chrapusta Anna
Published: September 2023

Wstęp Zespół Polanda to wrodzony niedorozwój ręki, kończyny górnej i klatki piersiowej pod postacią niedorozwoju mięśnia piersiowego większego. Obraz kliniczny jest różnorodny, podobnie jak zakres objętych niedorozwojem regionów. Cel Niniejsza praca przedstawia analizę własnych doświadczeń w leczeniu dzieci i dorosłych zespołem Polanda. Materiał i metody Materiał kliniczny stanowiło 33 pacjentów podzielonych na dwie grupy. Grupa pierwsza, składająca się z 24 dzieci, to pacjenci leczeni z powodu wady ręki. Grupa druga, składająca się z 9 starszych pacjentów, była poddana operacji w obrębie klatki piersiowej. Poddano analizie typy wad rąk i zastosowanych operacji, a także leczenie rekonstrukcyjne piersi i mięśnia piersiowego. Wyniki U dzieci wykonywano operację korekcyjną ręki od końca 1. roku życia. Przeprowadzano głównie rozdzielenie palcozrostu lub pogłębienie przestrzeni międzypalcowej, ale też policyzację wskaziciela lub zamknięcie rozszczepu ręki. Rekonstrukcje piersi przeprowadzano głównie z użyciem implantu u pacjentów między 16. a 18. rokiem życia. Wnioski W leczeniu pacjentów z zespołem Polanda dużą rolę odgrywa chirurgia ręki. Różnorodność wad powoduje konieczność stosowania jednoetapowego lub wieloetapowego leczenia z zastosowaniem różnych technik. Leczenie wad rąk dotyczy obu płci. Po okresie dojrzewania główną grupą pacjentów są kobiety kwalifikowane do rekonstrukcji piersi.
Leczenie powikłanej rany brzusznej u pacjenta leczonego z powodu raka odbytnicy, z wykorzystaniem terapii podciśnieniowej
Authors: Halak Tomasz , Halak Martyna
Published: September 2023

Podciśnieniowa terapia leczenia ran stosowana jest w celu przyspieszenia gojenia rany lub w leczeniu rany powikłanej. Skuteczność zastosowania terapii podciśnieniowej wynika z jej wielokierunkowego działania, które warunkuje gojenie. Terapię tę można również wykorzystać w metodzie otwartego brzucha, szczególnie u pacjentów septycznych, ze względu na udowodnioną poprawę rokowania.
Secondary xylem of tree species from Cerrado biome
Authors: Alves André Fernandes , Guimarães Carvalho Amelia , Pereira Lopes Olivia , Vinha Zanuncio Antonio Jose , de Cássia Oliveira Carneiro Angélica
Published: September 2023

Cerrado is the second largest Brazilian morphoclimatic domain. Despite being a region of great ecological importance, it has been the target of constant threats caused by anthropogenic activities, mainly those related to agriculture and livestock farming. With a rich biodiversity still not fully known and constantly being devastated, the Cerrado lacks studies. The objective of this study was to microscopically analyze the wood of Cerrado tree species. Wood samples were collected from nine tree species in a Cerrado area located in Monte Carmelo, Minas Gerais. Microscopic analyses were carried out on permanent histological slides and macerated material, following IAWA Committee standards. This work provided information on species whose wood had not been previously described in the literature, such as Machaerium opacum and Eugenia dysenterica, as well as on previously described species.
Efforts Of Providing Balanced Nutrition Counseling for Pregnant Women and Giving Sukahitu Cookies in Increasing Knowledge, Attitude and Blood Haemoglobin Levels of Pregnant Women in Percut Sei Tuan District, Deli Serdang Regency
Authors: . Mahdiah , Zahara Ratna , Oppusunggu Riris
Published: September 2023

Anemia in pregnant women occurs due to iron deficiency (Fe). About 95% of anemia cases during pregnancy are due to iron deficiency. This study aims to determine the effect of Balanced Nutrition Counseling for Pregnant Women and Giving Sukahitu Cookies for Increasing Mother's Knowledge, Attitudes and Hemoglobin Levels in Percut Sei Tuan District, Deli Serdang Regency. This research was a quasi-experimental pre and post-test of two groups by respectively 30 pregnant women receiving the intervention and a control group.The pregnant women group was given a balanced nutrition counseling intervention for pregnant women with media booklets for three weeks and 100 g/pack/day of Sukahitu Cookies. Meanwhile, the control group received as much as 100 g/day cookies during the study. To analyze the effect of providing counseling with balanced nutrition booklet media for pregnant women and giving sukahitu cookies to increasing knowledge, attitudes and hemoglobin levels in anemia of pregnant women, an independent t-test p<0.05 was used. Statistical results show there is a difference in the increase in knowledge scores of pregnant women between the intervention group and the control group p=0.000. This show Balanced Nutrition Counseling for Pregnant Women and Providing Sukahitu Cookies can increase knowledge, attitudes, and hemoglobin levels of pregnant women in Percut Sei Tuan District, Deli Serdang Regency.
Mining Github for Factors That Affect Open Source Software Sustainability
Authors: Alshomali Mohammad Azees Abdulhassan , Albayati Wurood
Published: September 2023

Open-Source Software (OSS) is everywhere. The availability of such software enables researchers in software engineering to have a deep insight into the factors that affect the success of the software. Some OSS repos get more popular and evolve over time, while others may only survive for a couple of months. This study aims to help developers identify internal factors that affect the sustainability of their software. Firstly, identify the most demanding application domain; secondly, observe the most popular repositories (for the demanded application domain) for about three years to identify the factors that help such repos to survive (sustainability factors). Dara mining algorithms (classification and regression) are used as a tool to find the GitHub factors that affect the sustainability of OSS.
Non-perturbative solution of the dual BBGKY hierarchy for hard-sphere fluids
Authors: Gerasimenko V.I. , Gapyak I.V.
Published: September 2023

The communication presents a rigorous description of the evolution of observables of many colliding particles. Forexpansions representing a solution of the Cauchy problem of the dual BBGKY hierarchy representations of their generating operators are established.
On the Dirichlet problem for A-harmonic functions
Authors: Gutlyanskiĭ V.Ya. , Ryazanov V.I. , Sevost’yanov E.A. , Yakubov E.
Published: September 2023

We study the Dirichlet boundary value problem with continuous boundary data for the A-harmonic equations div[A grad u] = 0 in an arbitrary bounded domain D of the complex plane £ with no boundary component degenerated to a single point. We provide integral criteria, including the BMO and FMO criteria expressed in terms of A (z), for the existence of weak solutions to the problem. We also discuss the connections between A-harmonic functions and potential theory.
Динамічний метод другого порядку одержання наближених розв’язків багатовимірних обернених задач теплопровідності
Authors: Мацевитий Ю.М. , Тимошенко Ю.О.
Published: September 2023

Розглянуто постановку оберненої задачі нестаціонарної теплопровідності в загальній формі. Показано, що подібні постановки відносяться до класу некоректно поставлених задач. Запропоновано динамічний метод регуляризації першого та другого порядку таких некоректних задач. Доведено, що динамічний метод регуляризації другого порядку дозволяє отримувати наближений розв’язок за наявності збурень у вхідних даних.
Електродинамічний критерій якості ізоляції підземного трубопроводу
Authors: Джала Р.М. , Вербенець Б.Я. , Джала В.Р. , Мельник М.І.
Published: September 2023

Описано триєдину математичну модель електромагнетного поля підземного трубопроводу, яка базується на розв’язаннях крайових задач електродинаміки для циліндричних структур, теорії електричних кіл з розподіленими параметрами та теорії розподілу магнетного поля електричних струмів. На цій основі досліджено залежності характеристик поля від параметрів труби і середовища та розроблено методи і за- соби діагностичних обстежень протикорозійного захисту магістральних трубопроводів і трубопровідних мереж. Показано доцільність зіставлення коефіцієнта заникання поля вздовж трубопроводу із заниканням електромагнетної хвилі в ґрунті та запропоновано електродинамічний критерій для оцінювання якості захисного покриву на різних ділянках. Наведено приклади оперативного виявлення ділянок з незадовільною ізоляцією підземних магістральних трубопроводів за безконтактними вимірами струмів.
Простий підхід до створення системи 1,3,4,6,11,11a-гексагідро-2H-піразино[1,2-b]ізохіноліну
Authors: Коноваленко А.С. , Шабликін О.В. , Шабликіна О.В. , Броварець В.C. , Хиля В.П.
Published: September 2023

Розроблено простий підхід до синтезу похідних піразино [1,2-b]ізохіноліну — гетероциклічної системи, що є основою низки біологічно активних речовин природного походження. Внаслідок взаємодії 3-форміл- та 3-ацетил-1H-ізохромен-1-ону з етан-1,2-діаміном, що відбувається у водному чи водно-спиртовому середовищі, за одну стадію формується 3,4-дигідро-6H-піразино[1,2-b]ізохінолін-6-оновий цикл. На прикладі похідної із метильною групою в положенні 1 було показано, що вказана гетероциклічна система може бути відновлена як до 1-метил-1,3,4,6,11,11a-гексагідро-2H-піразино[1,2-b]ізохіноліну (дією трисацетоксиборогідриду натрію), так і до 1-метил-1,2,3,4-тетрагідро-6H-піразино[1,2-b]ізохінолін-6-ону (після тривалого нагрівання з надлишком алюмогідриду літію). Описано новий спосіб одержання 3-форміл- 1H-ізохромен-1-ону, відомого також як природна речовина артемідиналь. Пропоновані методики використовують нескладні синтетичні процедури та прості й доступні реагенти.
Функціоналізація оксимів (спіро)піранокумаринів
Authors: Красилов І.В. , Москвіна В.С. , Хиля В.П.
Published: September 2023

Досліджено шляхи структурної модифікації оксимів піранокумаринів та спіропіранокумаринів — синтетичних аналогів природного гравеолону. Показано, що оксими (спіро)піранокумаринів є зручними реагентами для введення додаткових функціональних груп — аміногрупи, гідроксильної групи, амідоксимного фрагмента — біоізостера карбоксильної функції, а також оксадіазольного циклу. Розроблено препаративні методики алкілювання оксимів (спіро)піранокумаринів і досліджено взаємодію отриманих похідних з первинними алкіламінами, гідроксиламіном та триетилортоформіатом.
Вплив агрегації бензоіндосквараїнів на генерацію синглетного кисню
Authors: Синюгіна А.Т. , Іщенко О.О.
Published: September 2023

Методом електронної абсорбційної і флуоресцентної спектроскопії з використанням пасток показано, що бензоіндосквараїн з гідрофобним бічним радикалом сенсибілізує утворення синглетного кисню ефективніше, ніж його аналог з гідрофільним радикалом, зі зростанням відсотка води в ДМСО і етанолі. Встановлено, що це обумовлено більшою схильністю до агрегації першого порівняно з другим. Показано, що агрегат має сендвічеву будову, що сприяє активації сенсибілізації синглетного кисню за рахунок триплет-триплетного переносу енергії.
Визначення патернів алостеричної взаємодії івермектину з глутаматзалежним хлор идним іонним каналом Caenorhabditis elegans
Authors: Кустовський Є.О. , Ємець А.І.
Published: September 2023

Визначено структурні патерни алостеричної взаємодії івермектину (речовини з антигельмінтною та інсектицидною дією) з α-гомопентамерним глутаматзалежним хлоридним каналом Caenorhabditis elegans. Встановлено, що сайт взаємодії івермектину з GluClα C. elegans переважно складається з гідрофобних, аліфатичних, полярних та малих амінокислотних залишків. Макроциклічне лактонне кільце молекули івермектину має високу афінність до патерну V—I—G—A—M, утвореного амінокислотними залишками V278, I280, G281, A282, M284, які належать до M3 (+) субодиниці, та патерну I—V—D—L (залишки I273 M2-M3, D277, V278 M3 (+) субодиниці та L218 M1 (–) субодиниці). Спірокетальна група івермектину вза- ємодіє з патерном M—T—F—C—M—I (залишки M284, T285, F288, які є частиною M3 (+) субодиниці, та С225, M226, I229 M1 (–) субодиниці). У випадку бензофуранової групи кількісно переважають взаємодії з ма- лими та полярним залишками, а контактів з гідрофобними залишками найменше з усіх груп цієї речовини, що відображається в патерні T—A—S—N—D—I—L—Q—I—P (залишки T257, A258, S260, N264 M2, D277, I280 M3 (+) субодиниці та L218, Q219, I222, P223 M1 (–) субодиниці). Отримані дані можуть бути використані для пошуку нових молекулярних мішеней івермектину, а також для створення нових ефективних лігандів з високою афінністю до ідентифікованих мішеней івермектину в різних еукаріотичних організмів.
Ефективність оцінювання генетичної різноманітності рижію дрібноплідного (Camelina microcarpa Andrz. ex DC.) в Україні за допомогою SSR- та TBP-маркерів
Authors: Сахарова В.Г. , Блюм Р.Я. , Рабоконь А.М. , Пірко Я.В. , Блюм Я.Б.
Published: September 2023

Досліджено молекулярно-генетичне різноманіття рижію дрібноплідного (Camelina microcarpa Andrz. ex DC.) українського походження за допомогою методів оцінювання поліморфізму довжини першого інтрону генів β-тубуліну (tubulin-based polymorphism (TBP)) та аналізу мікросателітних послідовностей (simple sequence repeats (SSR)). На основі отриманих ДНК-профілів досліджених зразків встановлено міжгенотипові генетичні відмінності рижію дрібноплідного і порівняно ефективність застосованих методів. Зроблено висновок про вищу ефективність TBP-методу для аналізу гербарних зразків у разі лімітованості рослинного матеріалу та високого ступеня пошкодженості ДНК через тривале зберігання.