bluuebunny/crossref_metadata_2025 huggingface dataset:
Gait Disturbance … of Red Herrings, Oranges, and Lemons – A Case of Missed Vitamin C Deficiency and Lessons Learnt
Authors: De Battista Nadine Anne , Zammit Marie Claire , Soler Sandro Galea , Attard Stephen
Published: March 2024

Vitamin C deficiency resulting in scurvy, is considered to be a rare nutritional disorder in developed countries, thus leading to underdiagnosis with exposure to unnecessary investigations and delay in appropriate treatment. The wide myriad of clinical signs and symptoms with which vitamin C deficiency can present (including haematological, musculoskeletal and vague constitutional symptoms that overlap with other common medical conditions), also contributes to this diagnostic challenge. Despite scurvy being habitually thought to be present in children with neurodevelopmental conditions such as autism spectrum disorder, other important at-risk groups that frequently tend to be forgotten include children with persistent fussy eating behaviour, and children with abnormal vitamin C metabolism. We hereunder present a case of a 10-year-old boy who presented to an acute general hospital for further investigation with gait disturbance. The lack of detailed nutritional assessment on presentation in the first instance led to a missed diagnosis of vitamin C deficiency, thus exposing the child to a wide array of unnecessary investigations and treatments. The added perplexity to the case resulting from false positive results of investigations performed as part of this child’s workup, is also discussed.
Note on quasivarieties generated by finite pointed abelian groups
Authors: Basheyeva Ainur , Lutsak Svetlana
Published: March 2024

We prove that a finite pointed abelian group generates a finitely axiomatizable variety that has a finite quasivariety lattice. As a consequence, we obtain that a quasivariety generated by a finite pointed abelian group has a finite basis of quasi-identities. The problems arising from the results obtained are also discussed.
Penalizing Shirking in Discovering Unsuitability
Authors: Xue Ying , Jiang Xu
Published: March 2024

We study the optimal penalty scheme for an expert firm and a layman client against shirking in their costly interaction that helps the firm discover the unsuitable transaction, i.e. one that yields a loss for the client. The market solution to the bilateral hidden action problem fails to incentivize sufficient effort and leads to an inefficient outcome, which creates scope for government action. By contrast, private contracts obtain efficiency in an alternative framework with just the firm’s unilateral effort, highlighting the role of the client’s effort in rationalizing legal intervention. Under the unique first-best policy, the firm not only refunds the client but also pays the client’s loss to the government if the firm fails to stop a transaction that ends up being unsuitable. The client receives the refund but submits the firm’s production cost to the government. The optimal punitive penalty is their total contingent loss and is robust to private contracts. The optimal penalty generalizes to a multi-agent team by making each agent internalize all others’ contingent losses.
On the Role of Courts in Climate Policy: Comment on Lando
Authors: Hylton Keith N.
Published: March 2024

This is a response to Henrik Lando’s article on courts and climate policies. Lando’s argument can be summarized in two propositions. The first is that EU courts have adopted a suboptimal legal standard for evaluating climate policies. Lando’s second proposition is that courts are not a good forum for the evaluation of climate policies because of the need to focus on the narrow interests of the litigants before the courts. I agree with Lando’s first proposition, but I disagree somewhat with his second proposition. It is pitched too broadly in my view.
A forradalom keresése
Authors: Kiss Viktor
Published: March 2024

Kiss Viktor esszéjében azt állítja, hogy napjainkban a forradalom indirekt és pozitív formáit kell megtalálnunk, amely baloldali útként értelmezhető a posztmodern kapitalizmus turbulens viszonyai között is.
Élni az ajánlattal
Authors: Bagi Zsolt
Published: March 2024

„Mi elméletírók nem azért írunk, hogy vezessünk, nem azért, hogy megmondjunk: ajánlatot teszünk, javaslunk, kihívunk, hogy olvasóink éljenek a szövegünkkel.“
Combined Effects of Static and Dynamic Stretching on the Muscle-Tendon Unit Stiffness and Strength of the Hamstrings
Authors: Takeuchi Kosuke , Nakamura Masatoshi , Matsuo Shingo , Samukawa Mina , Yamaguchi Taichi , Mizuno Takamasa
Published: March 2024

Takeuchi, K, Nakamura, M, Matsuo, S, Samukawa, M, Yamaguchi, T, and Mizuno, T. Combined effects of static and dynamic stretching on the muscle-tendon unit stiffness and strength of the hamstrings. J Strength Cond Res 38(4): 681–686, 2024—Combined static and dynamic stretching for 30 seconds is frequently used as a part of a warm-up program. However, a stretching method that can both decrease muscle-tendon unit (MTU) stiffness and increase muscle strength has not been developed. The purpose of this study was to examine the combined effects of 30 seconds of static stretching at different intensities (normal-intensity static stretching [NS] and high-intensity static [HS]) and dynamic stretching at different speeds (low-speed dynamic [LD] and high-speed dynamic stretching [HD]) on the MTU stiffness and muscle strength of the hamstrings. Thirteen healthy subjects (9 men and 4 women, 20.9 ± 0.8 years, 169.3 ± 7.2 cm, 61.1 ± 8.2 kg) performed 4 types of interventions (HS-HD, HS-LD, NS-HD, and NS-LD). Range of motion (ROM), passive torque, MTU stiffness, and muscle strength were measured before and immediately after interventions by using an isokinetic dynamometer machine. In all interventions, the ROM and passive torque significantly increased (p < 0.01). Muscle-tendon unit stiffness significantly decreased in HS-HD and HS-LD (both p < 0.01), but there was no significant change in NS-HD (p = 0.30) or NS-LD (p = 0.42). Muscle strength significantly increased after HS-HD (p = 0.02) and NS-LD (p = 0.03), but there was no significant change in HS-LD (p = 0.23) or NS-LD (p = 0.26). The results indicated that using a combination of 30 seconds of high-intensity static stretching and high-speed dynamic stretching can be beneficial for the MTU stiffness and muscle strength of the hamstrings.
Global Infectious Diseases between September and December 2023: Periodical Analysis
Authors: Liao Junzi , Wu Yufan , Sun Yinfu , Xiang Qi , Li Taihan , Luo Yi , Li Guodan , Yu Wenjin , Liu Dongliang , He Shiping , Gu Dayong
Published: March 2024

A plethora of infectious diseases have plagued mankind since the dawn of civilization. Historically, humans have suffered from a range of infectious diseases, including MPOX, Ebola virus, dengue virus, malaria, and influenza. Many respiratory infectious diseases are more likely to occur in cold weather. Due to the speed and easy mode of transmission, and short latency, respiratory infectious diseases are more likely to cause epidemics. It is more likely that influenza will circulate during the autumn-winter months, resulting in great outbreaks of influenza-like illnesses and even serious seasonal epidemics in some cases. We obtained surveillance data from the Shusi Tech’s Global Epidemic Information Monitoring System and comprehensively analyzed the timing and location of outbreaks in infected populations from September-December 2023.
The Mouse Inferior Colliculus Responds Preferentially to Non-Ultrasonic Vocalizations
Authors: Tehrani Mahtab , Shanbhag Sharad , Huyck Julia J. , Patel Rahi , Kazimierski Diana , Wenstrup Jeffrey J.
Published: March 2024

The inferior colliculus (IC), the midbrain auditory integration center, analyzes information about social vocalizations and provides substrates for higher level processing of vocal signals. We used multichannel recordings to characterize and localize responses to social vocalizations and synthetic stimuli within the IC of female and male mice, both urethane anesthetized and unanesthetized. We compared responses to ultrasonic vocalizations (USVs) with other vocalizations in the mouse repertoire and related vocal responses to frequency tuning, IC subdivisions, and sex. Responses to lower frequency, broadband social vocalizations were widespread in IC, well represented throughout the tonotopic axis, across subdivisions, and in both sexes. Responses to USVs were much more limited. Although we observed some differences in tonal and vocal responses by sex and subdivision, representations of vocal responses by sex and subdivision were largely the same. For most units, responses to vocal signals occurred only when frequency response areas overlapped with spectra of the vocal signals. Since tuning to frequencies contained within the highest frequency USVs is limited (<15% of IC units), responses to these vocalizations are correspondingly limited (<5% of sound-responsive units). These results highlight a paradox of USV processing in some rodents: although USVs are the most abundant social vocalization, their representation and the representation of corresponding frequencies are less than lower frequency social vocalizations. We interpret this paradox in light of observations suggesting that USVs with lower frequency elements (<50 kHz) are associated with increased emotional intensity and engage a larger population of neurons in the mouse auditory system.
Structural Plasticity of GABAergic Pallidothalamic Terminals in MPTP-Treated Parkinsonian Monkeys: A 3D Electron Microscopic Analysis
Authors: Masilamoni G. J. , Kelly H. , Swain A. J. , Pare J. F. , Villalba R. M. , Smith Y.
Published: March 2024

The internal globus pallidus (GPi) is a major source of tonic GABAergic inhibition to the motor thalamus. In parkinsonism, the firing rate of GPi neurons is increased, and their pattern switches from a tonic to a burst mode, two pathophysiological changes associated with increased GABAergic pallidothalamic activity. In this study, we used high-resolution 3D electron microscopy to demonstrate that GPi terminals in the parvocellular ventral anterior nucleus (VApc) and the centromedian nucleus (CM), the two main GPi-recipient motor thalamic nuclei in monkeys, undergo significant morphometric changes in parkinsonian monkeys including (1) increased terminal volume in both nuclei; (2) increased surface area of synapses in both nuclei; (3) increased number of synapses/GPi terminals in the CM, but not VApc; and (4) increased total volume, but not number, of mitochondria/terminals in both nuclei. In contrast to GPi terminals, the ultrastructure of putative GABAergic nonpallidal terminals was not affected. Our results also revealed striking morphological differences in terminal volume, number/area of synapses, and volume/number of mitochondria between GPi terminals in VApc and CM of control monkeys. In conclusion, GABAergic pallidothalamic terminals are endowed with a high level of structural plasticity that may contribute to the development and maintenance of the abnormal increase in pallidal GABAergic outflow to the thalamus in the parkinsonian state. Furthermore, the evidence for ultrastructural differences between GPi terminals in VApc and CM suggests that morphologically distinct pallidothalamic terminals from single pallidal neurons may underlie specific physiological properties of pallidal inputs to VApc and CM in normal and diseased states.
Analisis Pemahaman Konsep dan Kesulitan Siswa Kelas XI pada Materi Hidrolisis Garam Menggunakan Tes TTMC dan TwTMC dengan Model Problem-Based Learning
Authors: Ristanti Shelly Dewi , Sumarti Sri Susilogati
Published: March 2024

Penelitian ini bertujuan untuk mengidentifikasi profil pemahaman konsep dan kesulitan siswa dalam materi hidrolisis garam dengan model problem based learning. Penelitian ini dilaksanakan di SMA N 12 Semarang tahun ajaran 2023. Metode yang digunakan dalam penelitian ini adalah metode mixed methods dengan design penelitian concurrent embedded. Instrumen yang digunakan adalah three-tier multiple choice test dan two-tier multiple choice test. Penelitian ini mengunakan teknik analisis data berupa uji validitas, uji reabilitas, uji daya beda, dan uji tingkat kesukaran. Hasil dari penelitian ini diperoleh pemahaman konsep materi hidrolisis garam menggunakan model Problem Based Learning tergolong cukup. Profil pemahaman konsep materi hidrolisis garam menggunakan model Problem Based Learning berdasarkan indikator. Pemahaman konsep siswa pada materi hidrolisis garam dengan empat konsep yang diujikan sebesar 35 %, sedangkan untuk kategori miskonsepsi sebesar 20%, dan kateori tidak paham sebesar 45%. Hasil analisis kesulitan siswa pada penerapan pembelajaran materi hidrolisis garam menggunakan model Problem Based Learning tergolong rendah, yakni sebesar 38%. Dengan menggunakan model pembelajaran yang sesuai, hasil kesulitan belajar dan pemahaman konsep dapat digunakan sebagai pedoman untuk meningkatkan proses pembelajaran selanjutnya.
Pengembangan Instrumen Tes Three-Tier Multiple Choice berbantuan Google Form untuk Mengukur Kemampuan Berpikir Kritis Siswa pada Topik Stoikiometri
Authors: Fitriani Feby , Priatmoko Sigit , Wardani Sri , Nurhayati Sri
Published: March 2024

Berpikir kritis tidak hanya dapat dikembangkan melalui proses pembelajaran tetapi juga dapat ditingkatkan memalui alat evaluasi yant tepat, sehingga peneliti mengembangkan instrumen three-tier berbantu google form untuk dapat mengukur ketrampilan berpikir kritis peserta didik pada materi stoikiometri. Metode penelitian yang digunakan adalah Research and Development (RD) model tipe formative research Tessmer. Subjek penelitian ini adalah peserta didik kelas XI IPA SMA Negeri 1 Karanganyar Teknik pengumpulan data meliputi wawancara, tes, angket, dan dokumentasi. Teknik analisis data: validasi ahli, analisis soal (validitas, reliabilitas, tingkat kesukaran, dan daya beda), analisis profil berpikir kritis, analisis angket respons peserta didik. Hasil menunjukan: validasi ahli 96,75%, validitas butir soal 0,7, reliabilitas 0,89, tingkat kesukaran sedang, dan memiliki daya pembeda yang baik, serta respon positif 76% terhadap instrumen tes. Hasil ketercapaian berpikir kritis peserta didik pada materi stoikiometri yaitu sebanyak 17% dengan kategori sangat kurang. Berdasarkan hasil yang diperoleh instrumen memiliki karakteristik yang baik, maka instrumen tes three-tier multiple choice berbantu google form layak digunakan untuk mengukur keterampilan berpikir kritis.
Media Pembelajaran Berbasis AI Chatbot pada Materi Termokimia di SMA Apakah Dibutuhkan?
Authors: Aldwinarta Farrel Hafiz , Nurdiana Rita , Sulistina Oktavia
Published: March 2024

Chatbot merupakan salah satu bentuk AI yang dapat memberikan jawaban dari pertanyaan pengguna dengan kemampuan machine learning. Pada bidang pendidikan, chatbot dapat digunakan sebagai media pembelajaran yang interaktif. Hal ini dapat menjadi sebuah inovasi dalam pembelajaran termokimia mengingat materi termokimia adalah materi kimia yang abstrak dan sulit dipahami sehingga berdampak pada motivasi dan hasil belajar siswa yang rendah. Tujuan dari penelitian ini adalah untuk mengidentifikasi kebutuhan media pembelajaran chatbot berbasis kecerdasan buatan untuk materi termokimia di SMA. Metode penelitian yang digunakan adalah deksriptif kualitatif dengan teknik pengambilan data berupa observasi langsung, penyebaran angket terhadap 20 siswa, dan wawancara terhadap guru dan siswa. Hasil penelitian menunjukkan bahwa pembelajaran termokimia di SMA Modern Al Rifa’ie masih dominan menggunakan buku paket. Teknologi AI masih belum dikenal baik oleh siswa dan hanya sebagian kecil guru yang menerapkan AI dalam pembelajarannya. Adapun alasan guru tidak mengenalkan AI kepada siswa karena ragu akan validitas materinya. Fasilitas di SMA Modern Al Rifa’ie mendukung penerapan AI dalam pembelajaran.
The The Effectiveness Of Project Based Learning Learning Model Based On Local Wisdom Plantae Material To Improve Students' Science Literacy Ability
Authors: Zahroh Fatimatuz , Suwarsi Enni , Ridlo Saiful
Published: March 2024

Scientific literacy is an ability that students must have in facing the challenges of the 21st century and is also one of the objectives of implementing the 2013 Curriculum. The object of this research is the basic competencies of Plantae material which is taught using project based learning (PjBL) based on local wisdom. This study aims to analyze the effectiveness of project-based learning (PjBL) based on local wisdom to train students' scientific literacy skills. This research was conducted in class X MA NU Miftahul Falah Dawe Kudus, the sample of this study was taken by using saturated sampling technique. This research design using One Group Pretest Posstest Design. The data was collected using test with indicators of scientific literacy competence. The test results were analyzed using the N-gain test and paired sample t-test to prove the effectiveness of the learning. The results showed that the level of learning effectiveness was moderate with the average of N-Gain 0.66. The results of the paired sample t-test obtained a value of sig. 0.0000 <Î± = 0.05, which means that there is a significant difference between the pretest and posttest mean values. Based on the research results it can be denied that the project-based learning based on local wisdom of the Plantae material is effective to train students' scientific literacy competencies
Development of Medicinal Plants Ethnobotany Study-Based Encyclopedia as Plantae Study Media
Authors: Hadiati Devi , Retnoningsih Amin , Widiatningrum Talitha
Published: March 2024

The competence of plantae material is grouping plants' characteristics into divisions and linking their roles in life. This study aims to test the validity and effectiveness of the encyclopedia media for medicinal plants in Berastagi and Desa Pantai Labu, North Sumatra. Research methods and development of medicinal plants encyclopedia using the model analysis, design, development, implementation, and evaluation. The medicinal plants' encyclopedia was developed from the plant exploration research results, which were then validated and readability tests. The trial was conducted at SMA N 16 Medan using one control class (without an encyclopedia) and one experiment class (using an encyclopedia and textbooks). The exploration and identification of medicinal plant species in Berastagi and Pantai Labu Village found 30 species of medicinal plants belonging to 17 families. The characteristics of the encyclopedia of medicinal plants include images in the encyclopedia from the research results in the form of identification and inclusion of scientific names, local names, and the benefits of medicinal plants. The validation of media experts is 98%, and material experts are 95% with very valid criteria. The media readability test is 90.50% with easy-to-understand standards. The media's effectiveness in the cognitive aspects of the experiment class was higher than the control class, namely by 90% with very effective criteria. Classical mastery of the experiment class's psychomotor aspects and affective aspects was 100% with very effective criteria.
Stem and Bioentrepreneurship Oriented Project Learning Model to Improve the Senior High Schooll Students’ Soft Skills, Entrepreneurial Interest and Learning Outcome
Authors: Latif Abdul , Saptono Sigit , Retnoningsih Amin
Published: March 2024

Soft skills and entrepreneurial interest are kinds of skills that must be owned by the students to face Indonesian demographic peak bonus (2020-2035). The objective of this research was to analyze the students’ soft skills improvement, entrepreneurial interest and learning outcomes by STEM and bioentrepreneurship oriented project learning model implementation. The method of this research used quasi experimental design with the form one group pretest and post test design. The subjects of this research was tenth grade of SMA Negeri 1 Wedung with the total students was 64. The instruments used were questionnaire and test. The questionnaire was used to measure the students’ soft skills and entrepreneurial interest meanwhile the test was used to measure the studens’ learning outcomes. The data analysis technique used criteria standard and N-gain. Criteria standard was to measure the soft skills and entrepreneurial interest meanwhile the N-gain was used to measure the improvement of learning outcomes. The result of the research found that average percentage score of students’ soft skills of X MIPA 1 and X MIPA 2 in high category, it was 71,19% meanwhile percentage score of entrepreneurial interest in category of high enough, it was 60%. The average of index gain the students of experiment class was 0,6382 it meant experiment class had high improvement of learning outcomes. It could be concluded that the implementation of STEM and bioentrepreneurship oriented project learning model could improve soft skills, entrepreneurial interest and learning outcomes of tenth grade students of SMA Negeri 1 Wedung Kabupaten Demak.
Dumbeg Production Saintification in Rembang, Central Java, Indonesia : Local Culture Integration Efforts in Science Learning
Authors: Lestari Wahyu , Sudarmin Sudarmin , Sumarni Woro
Published: March 2024

The purpose of this study was to reconstruct community science into scientific science in dumbeg production in Polandak village, Pancur District, Rembang Regency. The expected benefits in this study are to be used as an alternative source of contextual learning in schools, within the scope of science. The method used is descriptive qualitative through in-depth interviews, direct observation, and study of dumbeg production documentation. The focus of the research is the dumbeg production process from the preparation stage of the material, to the processing of materials. Data processing techniques in this study include analysis, verification, and the process of reconstructing community science into scientific science. The results of the study show that the scientific concepts contained in dumbeg production can be used as learning resources for science learning both at the elementary, middle and high school levels.
The Developing of PBL Oriented E-Magazine to Improve Critical Thinking Skills and Caring Attitudes Laboratory Work Safety
Authors: Trisna Mila , Iswari Retno Sri , Susanti R.
Published: March 2024

This research aims to test the validity and effectiveness of Problem Based Learning (PBL) oriented e-magazine teaching materials in improving critical thinking skills and caring attitude towards laboratory work safety. This research is a Research and Development (R&D) research that uses the ADDIE model by applying a pretest-posttest control group design. The subjects in this study were 51 students of class X MIA SMA N 7 Jambi City. Research instruments in the form of expert validation questionnaires, questionnaires on the readability of teaching materials, critical thinking skills test questions and attitudes about laboratory safety. The data analysis of the expert, practitioner, legibility and practicality validation questionnaire data showed that the validity of the e-magazine was considered very valid. Effective teaching materials improve critical thinking skills seen from the posttest average of the experimental class is 80.1 and the control class is 71.3. The average N-gain of the experimental class is 0.59 (medium) and in the control class is 0.33 (medium). Effective teaching materials increase the attitude of caring for safety as seen from the posttest average of the experimental class of 79.6 and the control class of 74.7. The average N-gain of the experimental class is 0.55 (medium) and in the control class is 0.42 (medium). Based on the research results, PBL-oriented e-magazines are valid for use in learning and are effective in improving critical thinking skills and caring attitude towards laboratory safety.
Development of E-module Based on Science, Technology, Engineering, and Mathematics (STEM) To Improve Science Literacy of Junior High School Students
Authors: Hutomo Bagus Addin , Saptono Sigit , Subali Bambang
Published: March 2024

In the 21st century, the development of science and technology is increasing rapidly, especially in the field of education. To prepare for these developments, students must be equipped with skills that support the use of technology and scientific literacy skills. The importance of scientific literacy skills in science learning is motivated by the results of the 2015 PISA test. The purpose of this study was to test the feasibility of STEM-based e-modules, analyze the effectiveness and profile of scientific literacy skills after using STEM-based e-modules. This research includes Research and Development (R&D) research from Borg & Gall in Sugiyono which has been modified without widespread dissemination. The data analysis technique used in this study includes descriptive data analysis related to the feasibility and profile of students' scientific literacy abilities, while the N-gain test is used to determine the effectiveness of the product. The results showed (1) the STEM-based (Science, Technology, Engineering, and Mathematics) e-module that was developed had very feasible criteria regarding aspects of content, presentation, and language (2) the results of the student's scientific literacy assessment showed an increase in the N-gain value with high criteria. (3) the profile of students' scientific literacy abilities which includes the process of science, the context of science, and the content of science have good criteria. Based on this, the use of the developed Science, Technology, Engineering and Mathematical (STEM)-based e-module is feasible to be used as an alternative learning resource for substance pressure material in science learning.
Effectiveness of Local Potential-Based Biodiversity E-booklets on Students' Critical Thinking Skills
Authors: Na'imah Nuning Nadrotun , Widiyaningrum Priyantini , Martuti Nana Kariada Tri
Published: March 2024

Cirebon Regency is one of the areas in West Java which is located on the coast of the Java Sea and has good natural resource potential, causing the biodiversity in the Cirebon area to be relatively high and attractive, thus having potential that can be used as a learning resource. This study aims to analyze the effectiveness of implementing the local potential-based biodiversity e-booklet on critical thinking skills according to Ennis, which consists of aspects of providing simple explanations, building basic skills, concluding, further clarification, setting strategies and tactics. This research is a development research or Research and Development (R&D) that adopts the Sugiyono model (2017) with the research subject of 101 students of class X SMA Negeri 1 Losari, MAN 5 Cirebon and SMA NU Ciledug. The sampling technique was purposive sampling with a one group pre-test post-test design. The pretest and posttest questions consist of 20 multiple choice questions according to the critical thinking aspect according to Ennis. The results showed that the local potential-based biodiversity e-booklet was effective for improving critical thinking skills with the results of the N-gain test in the high category (35.67%), medium (58.53%), low (5.80%) with the average N-gain is 0.63 which is included in the medium category and classical completeness reaches 86.14%. Biodiversity e-booklets based on local potential are effectively used to improve students' critical thinking skills.
The Influence of Project Based Learning Model on Students' Problem-Solving Competence in Learning of Acid-Base
Authors: Faizah Nur , Wijayati Nanik , Widiatningrum Talitha
Published: March 2024

The study aims to determine the influence of Project Based Learning Model on students' problem-solving competency. The method used was experimental method with Pretest-Posttest Control Group Design. This study was conducted at the State Junior High School 2 Brebes with the students of grade VII in the academic year 2021/2022 as the research population. The sampling technique used in this study was Simple Random Sampling. The results showed that the average N-Gain Score for the experimental class was 0.76, it was higher than the control class with the score of 0.60. The results of the T-Test indicated that the data resulted in this study met the criteria with the value of tcount = 18,812 ˃ ttable = 1,97897 meaning that Ha is accepted. It can be concluded that the Project Based Learning Model has an influence on the students' problem-solving competence in learning acid-base.
Concept Mastery and Mathematical Problem Solving Ability of High School Students in Uniform Motion in a Straight Line Materials (GLBB)
Authors: Dua Riong Maria Bernadetha , Ahmadi Farid , Supriyadi Supriyadi
Published: March 2024

This study aims to describe the pattern of the relationship between students concept mastery and mathematical problem-solving ability in GLBB material. This is qualitative associative/constructive research. This investigation was conducted with grade X MIA2 students at SMAN 1 Nita. This study's instrument included a test of concept mastery and mathematical problem-solving ability, documentation of student answer sheets, and unstructured interviews. The technique for data analysis consisted of five stages: data collection, description of raw data, data reduction, data categorization, and construction of category relationships. The findings revealed a reciprocal relationship between concept mastery and mathematical problem-solving ability. In addressing physics problems, mastery of concepts and mathematical problem-solving ability play mutually reinforcing roles. The level of concept mastery of students increases with their problem-solving abilities, and vice versa: the higher the level of conceptual mastery, the greater the mathematical problem-solving abilities. The results showed that there was a semantic congruence between issue solving using the Polya step indicator and problem solving at the levels of analyzing (C4), evaluating (C5), and creating (C6).

Keywords : GLBB, Concept Mastery, Mathematical Problem Solving Ability
Improving Critical Thinking Skills of Junior High School Students in Science Learning Using the Development of Interactive E-Module Based Macromedia Flash
Authors: Meryastiti Vinandani , Ridlo Zainur Rasyid , Supeno Supeno , Rahayuningsih Rahayuningsih
Published: March 2024

The aim of this research is improving student critical thinking skills using interactive E-module based on macromedia flash. Critical thinking skills are one of the 4C skills students need to have in dealing with 21st century learning. Critical thinking skills is the ability to think reflectively and deeply in obtaining relevant information or knowledge and being able to make conclusions or decisions correctly and appropriately. Science teacher at SMPN 3 Jember has never trained a student's critical thinking skills through the learning process and has never done research on class 7 student skills. Vastly improved technology can be used in education to develop the taught materials of modules called e-modules. The study aims to determine the validity, practicality, and effectiveness of an interactive e-module based on macromedia flash to improve the critical thinking skills of junior high school students in science learning. The type of research used is research and development with the ADDIE development model consisting of the analysis, design, development, implementation, and evaluation. The results showed that 1) the interactive e-module based on macromedia flash was declared very valid with a percentage of 93%, 2) the practicality of interactive e-module based on macromedia flash was declared very good with a percentage of 95.2%, and 3) the interactive e-module based on macromedia flash was declared effective for improving students' critical thinking skills with an n-gain value of 0.4 belonging to the medium category and getting a positive response from students with percentage of 81.25% which was classified as positive category. Based on the results of the study, the interactive e-modules based on macromedia flash is effective in improving students' critical thinking skills.
Development of CTL-Based Teaching Material Supplements in Biological Literacy Training
Authors: Islamiyanti Dinda Fuji , Lisdiana Lisdiana , Yuniastuti Ari
Published: March 2024

This study aims to develop supplemental CTL-based respiratory system teaching materials to train students' biological literacy skills. The quality of teaching material supplements is measured by the criteria of the characteristics of teaching material supplements, validity, readability and effectiveness of teaching material supplements when used in the learning process. The characteristics of teaching material supplements consist of 7 activities, namely Constructivism, Inquiry, Questioning, Learning community, Reflection, Authentic assessment. The validation of teaching material supplements was assessed by material experts and media experts. The results showed that the percentage of validity of teaching material supplements by material experts was 88.1% with very valid criteria and the mean validity by media experts was 96% with very valid criteria. The legibility of teaching material supplements was analyzed based on the readability questionnaire data for teachers and students after the trial was carried out at SMA Negeri 7 Cirebon City. The results of the teacher readability questionnaire were 87.7% very good criteria and 85.5% very good criteria for student readability. The effectiveness of teaching material supplements in training biological literacy skills was tested using the N-gain test obtained from the results of the pretest and posttest questions based on biological literacy. The mean value of the pretest is 48.15 and the posttest is 77.04. Biological literacy N-test gain with an average of 0.56 in the medium category. Based on the results obtained, it can be concluded that the developed teaching material supplements meet the criteria of characteristics, validity, readability and effectiveness and can train biological literacy skills.
Development of Project Based Ethno-STEM Online Learning Module to Increase Interpersonal Literacy and Learning Out-come
Authors: Setiawan Imam , Sudarmin Sudarmin , Partaya Partaya
Published: March 2024

Interpersonal skills are ability to understand sociocultural phenomena which include aspects of communication, appreciation, tolerance, caring, empathy, and being able to work with others and be able to adapt well in the surrounding environment. This is a very important provision that must be owned by every student. Purpose of this research is to develop learning media for brave science that examines local wisdom content to study the topic of food ingredients. This research was conducted at An-Nur Ungaran Middle School and several traditional food industry places around the student's residences. The research method used is R&D with the ADDIE model. This media was validated and declared appropriate by media experts and material experts, then applied in science learning. The data obtained from the readability test, and the N-Gain test from students. The results of the study show that 1) Ethno-STEM learning module can be developed using the ADDIE model and is declared feasible to be applied in learning; 2) Ethno-STEM learning module can be developed to have good readability results, namely at a score of 61.4%; 3) Using of this Ethno-STEM module can improve interpersonal literacy and learning outcomes with N-gain values of 0.31 and 0.33, respectively.
An Exploratory Study to Investigate the Implementation of Feynman Learning Method in a Physics Classroom Setting
Authors: Wea Kristiana Nathalia , Dua Yohanes Sudarmo , Elizabeth Agustina
Published: March 2024

In order to explore alternative methods to learn physics effectively, this research was inspired by a fundamental question: how did famous physicists use to learn and/or teach physics? Are there any recipies suggested by these physicists which are still relevant and can be imitated and applied to physics learning in a today classroom? This research aims at exploring the impact of the implementation of Feynman learning method on students’ physics concepts understanding and describing their spontaneous responses about the implementation of this learning method afterwards. This research was an exploratory research conducted at one grade X science class of St. Gabriel Catholic Senior High School in Maumere city, Flores. Data regarding students’ understanding were collected through pre and post test questionnairres and their spontaneous responses were obtained through unstructured interview. The results of  N-gain pretest and post test score was 0.49. Apart from few non-positive responses, students’ responses indicated that the method can encourage them to actively participate in the learning process, improve their communication skill, and train their abilities to explain things in simple ways. The results suggest that there was an improvement in students’ physics concepts understanding with a medium N-gain score and that this learning method is positively appreciated by the participants.
Female rats present higher oxidative damage and inflammation during goitrogenesis
Authors: Faria Caroline C , Pereira Leonardo Matta , Moreira Luiz Gabriel Portilho , Faustino Kathelinie Celestino , Peixoto Milena Simões , Cunha de Oliveira Ariclécio , Ferreira Andrea Claudia Freitas , Carvalho Denise Pires , Fortunato Rodrigo Soares
Published: March 2024

Thyroid disorders affect more women than men, but the underlying mechanisms contributing to this disparity remain incompletely understood. Thyrotropin (TSH), the primary regulator of thyroid oxidative hormonogenesis, has been implicated as a risk factor for proliferative thyroid diseases and a predictor of malignancy. In this study, we aimed to evaluate the impact of sustained elevated TSH levels on thyroid redox homeostasis, inflammatory markers, and DNA damage response in both male and female rats. Rats were treated with methimazole for 7 or 21 days, and hormonal measurements were conducted. H2O2 levels were evaluated in thyroid membrane fractions, while enzymatic activities were assessed in total thyroid homogenates. Sex-specific differences emerged, with females displaying higher reactive oxygen species levels – increased transiently NOX and sustained DUOX activities. Lipid peroxidation marker 4-hydroxynonenal (4-HNE) was elevated in females at both time points, contrasting with males just at 21 days. Sexual dimorphism was observed in DNA damage response, with females showing higher γH2AX levels at 21 days. Elevated IL-1β, TNF-α, CD11b mRNA, and phospho-NF-κB levels at 7 days indicated a distinct inflammatory profile in females. Notably, both sexes exhibited upregulated antioxidant enzymes. Our data suggest that females are more susceptible to oxidative damage and inflammation in our goiter model, which may be associated with higher ROS production and a less-efficient antioxidant defense system. These findings provide insights into the sex-specific mechanisms underlying thyroid dysfunction and highlight the importance of considering sex disparities in thyroid disorder research.
Protein for Scraps: A Study of the European Union “Circular” Raw Materials Trade
Authors: Llorente-González Leandro J.
Published: March 2024

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The shift from the current extractive linear production and consumption system to a circular economy (CE) has been heralded as a way to reduce the negative environmental and social impacts of human economic activity. The European Union (EU) has committed to leading the way to a worldwide CE, with the development of an international market of recyclable raw materials (RRM) as one of the main pillars of its strategy. However, there is extensive evidence regarding the unequal distribution of the economic benefits and environmental damages related to international trade. Therefore, the objective of a global fair transition to a CE may be undermined if the related markets continue to reproduce the prevailing patterns of ecologically unequal exchange. In order to test whether or not this is the case, this research studies the physical trade balance and the terms of trade on the recent RRM trade flows from, to and between the EU27 member states.
Las ciencias sociales: de la explicación a la comprensión ensayo
Authors: Páez Elsa Ruth Rodríguez
Published: March 2024

Hablar de ciencias sociales y del papel de la epistemología en su constitución como ciencias, nos ubica en el ejercicio primario de identificar cuál ha sido el escenario histórico a partir del cual se ha forjado la pregunta por la realidad social y lo psicológico como objeto peculiar de la ciencia. De igual forma nos traslada frente a la pregunta por los métodos de aproximación a ésta realidad así como la concepción de ciencia en Occidente y la hegemonía, parece que aún más vigente que nunca, del modelo galileano y positivista, frente al cual se debate la fundamentación científica por la construcción de la epistemología propia de las ciencias sociales que propone un modelo teleológico o hermenéutico para hacer ciencia.
A limit theorem for the Hurwitz zeta-function on the space of meromorphic functions
Authors: Ignatavičiūtė Jolita
Published: March 2024

There is not abstract.
Uniform distribution on the four-dimensional torus. II
Authors: Misevičius Gintautas
Published: March 2024

There is not abstract.
Об одной системе эллиптических уравнении в частных производных второго порядка
Authors: Puriuškis Gintaras
Published: March 2024

There is not abstract.
The analysis of the Lithuanian teacher's databases in the scope of mathematics' teaching
Authors: Dzemyda Gintautas , Kurasova Olga , Šaltenis Vydūnas , Tiešis Vytautas
Published: March 2024

In the paper we present the results of integrated analysis of data stored in the system of the Lithuanian teacher's database and of data from other sources representing the state of education system and the demographical changes in Lithuania. The research covers the analysis of dynamics of pedagogical staff and pupils, and the prognosis of tendency that have impact on the development of information society. Special emphasis is placed on teachers of mathematics.
Models and software of study process data analysis
Authors: Janilionis Vytautas , Ruzgas Tomas
Published: March 2024

The models of study process data analysis and statistical software for decision-making support are presented in this paper. The models and software were developed using applied statistics met­hods (descriptive statistics, analysis of variance, nonparametric tests, cluster analysis, correlation and logistic regression analysis) as well as data warehousing, multidimensional reporting, visua­lisation, object progranuning technologies and software SAS. The developed system is used for the analysis of study process data of Kaunas University of Technology. It enables to analyse the relationships and dependencies between various factors (e.g. study areas, faculties, study modules groups, form of studies, credits, weighted averages of the exams grades, grades of study modules or their groups etc.) and use the results for the effective decision-making.
Student and virtual learning environment interaction. Research of advanced attitudes
Authors: Tankelevičienė Lina
Published: March 2024

Educational institutions are interested in attempting to increase the variety and number of course offerings by using alternative delivery systems including the Intemet. Implementing virtual learning environments is one of the ways to do so. This paper deals with results of questionnaire, which was made to identify advanced students and schoolchildren attitudes towards virtual learning environments.
The substantiation of mathematics abilities test contents' structure of the primary school pupils
Authors: Kiseliovas Arkadijus , Kiseliova Danutė
Published: March 2024

We have performed a statistic analysis of mathematics textbooks and of general education of the fourth – formers according to the teaching contents' categories and their operationality.We have divided into three categories the standard requirements for the pupil's communicative abilities, mathematics abilities and skills, the abilities linked with the expression of mathematics thinking in soling problems.The classification of the pupil's cognitive activity was done of Cole's taxonomy of cognitive activity skills reflecting three categories linked with the results of learning in the cognitive sphere: knowledge, skills and teaching.
The investigations of zeta-functions in Lithuania
Authors: Laurinčikas Antanas
Published: March 2024

There is not abstract.
The process of lithuanian mathematical terminology in 1920–1940
Authors: Pekarskas Vidmantas , Pekarskienė Aldona
Published: March 2024

Lithuanian mathematical terms used in mathematical textbooks for the secondary schools is­sued in 1920–1940 are compared in the article.
Estimation of total in skewed population
Authors: Krapavickaitė Danutė , Turkuvienė Jurgita
Published: March 2024

Aim of this paper is to estimate total of the crop of winter wheat in the skewed population of farmers in Lithuania using different sampling strategies, to compare the estimates with the true value, to compare the methods with each other and to find out the most suitable strategy for the estimation of the total.
Symmetrical splitting scheme for nonlinear Shrödinger equation
Authors: Čiegis Raimondas , Pakenienė Violeta
Published: March 2024

In this paper we consider one-dimensional nonlinear Shrödinger equation. The equation inclu­des an absorption term and the solution is periodically amplified in order to compensate the lose of the energy. We present a finite difference approximation by a symetrical splitting scheme. The convergence of the discrete solution is proved.
On solving the plastoelastic problen in space of the commutative matrixes
Authors: Kleiza Vytautas
Published: March 2024

A method for calculating mechanical parameters of multilayer structural elements (MSE) and their layers in elastic and plastoelastic zones are presented and grounded in the case of axial stret­ching. The method of diagonal matrices is proposed to define the parameters of MSE's and their layers. In the elastic zone, MCE's are completely defined by two matrices: that of the modulus of elasticity and layer cross-section areas. In the plastoelastic zone,  by the matrix of the layer cross­section areas and a diagonal matrix-function that defines σ - ε diagrams of the layers. In the case of stretching, the above mentioned matrices make up a commutative group with respect to product operation which makes it possible to obtain compact expressions for the required parameters that do not depend on the number of layers and are analogous to scalar ones (a single-layer case). This kind of calculation methods enables us to compute the values of axial stiffness and normal stress as well as the quantity of limiting axial load or the zones areas of elastic and plastoelastic deformation, when the diagrams σ - ε of deformation materials composing it correspond to that diagram that of plastoelastic and elastically-strengthening materials.
Optimisation of parameters of vibration control process by applying rheological dynamic model
Authors: Didžgalvis Rimantas , Sudintas Antanas , Tiknevičienė Irena
Published: March 2024

The process of vibration control in question is investigated when the sediment is described in terms of rheologic body. The summarised dynamic and mathematical models of the vibration cont­rol are presented. In the partial case the sediment is described in terms of elastic-tough-plastic body. It is assumed that the vibration power is directed to the surface under cleaning at a certain angle therefore the process is analysed in tangent and normal directions. There is detennined optimum criteria for the vibration control process. The solution of the system is presented for the case when the angle of the influence power θ = 1. There are presented the main characteristics of the process and conclusions on it.
Calculation of the transient heat distribution on the plate by the finite element method
Authors: Turskienė Sigita
Published: March 2024

The paper deals with the analysis problem of transient heat distribution on the plate. The exter­nal surfaces of the plate are subject to the heat transfer by convection with time dependent fluid temperature. The efficiency of the numerical results is illustrated by the solution of the problem of a cooled plate.