bluuebunny/crossref_metadata_2025 huggingface dataset:
Decomposition CO₂ and CO in Flow of Gases by Means of Technical Ferrogravitational Field
Authors: Sizov Robert A.
Published: June 2021

The author's experimental studies shown that magnetic poles (magnetic charges) are real structural components of atoms and substance.   It is the magnetic poles, and not the electrons moving are direct sources of all magnetic fields in nature. The main reasons for ignoring magnetic charges in physical science are the hard conditions for their confinement in the structures of substance which is fundamentally different from the confinement of electrons, as well as the vicious electric magnetism of Maxwell (1873). True magnetic poles have been “buried alive” in physical theory under such theoretical surrogates as the magnetic moments of electrons.  The electromagnetic shells of atoms composed of electric and magnetic charges are the sources of gravitational field which is the vortex electromagnetic field and is described by vortex vector rot[E – H].  Depending on the state of vortex vectors rot[E – H]  in the composition of  gravitational fields (GF) emitted by atoms, these fields are subdivided into paragravitational (PGF) and ferrogravitational (FGF). The sources of ferrogravitational field are repelled from sources of paragravitational field, for example, from Earth.   The forces of such repulsion depend on the degree ferropolarization of gravitational field of atom - source of FGF, and the physical manifestation such repulsion is еthe effect of the ferrogravitational levitation (FGL), which discovered and investigated by the author. The FGL effect is also realized between the atoms emitting PGF and FGF in the formulations of chemical compounds.  When an external FGF acts on CO2 molecule the process ferropolarization of gravitational field of oxygen atom is realized, which should be defined as the gravito-plastic source.  In this case, the carbon atom, which is the gravito-stable mass, remains of paragravitational.              At interatomic distances <1 Å the forces of the gravito-levitation repulsion may be very significant and lead to the rupture of chemical bonds between oxygen and carbon atoms and to the disintegration of the molecule CO2. It is highly probable that the process of decomposition of CO2, similar to that described above, is carried out in the cells of leaves of green plants, which emit precisely the ferrogravitational field.  The decomposition of CO2 by FGF and the supply of oxygen to green plants is natural process that takes place in leaf cells called photosynthesis. However, photons in this process are only a stimulating factor contributing to the ferropolarization of gravitational field emitted by atoms oxygen in the composition of green plant cells.
Generalization of the Thomas-Wigner Rotation to Uniformly Accelerating Boosts
Authors: Sfarti A.
Published: June 2021

In the current paper we present a generalization of the transforms from the frame co-moving with an accelerated particle for uniformly accelerated motion into an inertial frame of reference. The motivation is that the real life applications include accelerating and rotating frames with arbitrary orientations more often than the idealized case of inertial frames; our daily experiments happen in Earth-bound laboratories. We use the transforms in order to generalize the Thomas-Wigner rotation to the case of uniformly accelerated boosts.
Guided Discovery in Genetic Learning: Implementation and Impact on Higher-Level Thinking Skills
Authors: Rahmadhani Fitri Laela , Miharja Fuad Jaya , Hudha Atok Miftachul
Published: June 2021

The challenges of 21st century education today require students to have high-level thinking skills given the many dynamic changes that occur in the field of education. High-level thinking skills are divided into several aspects including critical, creative and collaborative thinking skills. One of the appropriate learning model to improve critical thinking in students is the guided discovery model .The purpose of this study was to determine the implementation of  guided  discovery.  Model in learning genetics to increase higher thinking skills of students of SMAN 1 Lawang which include critical, creative, and collaborative thinking skills. This quasi-experiment was carried out by means of a pre-test and post-test control group design. The sample involved in this study is student of class XII IPA 3 (eksperiment class and student of class XII IPA 4 obtained by purposive sampling techniqueThe results showed that there are differences in the critical, creative and collaborative thinking skills of students who studied with the guided discovery model with a level of significance <0.05. The implementation of the guided discovery model can increase the level of critical, creative and collaborative thinking skills of students of SMAN 1 Lawang. This increase can be seen from the post test results of the experimental class, which are higher than the control class; the ability to analyze the results of the practicum that the experimental class has done; the creativity of students in processing and utilizing laboratory tools and materials; and the collaborative attitude of the students when participating in practicum activities.
The Profile of Collaboration Skills of Science Students in SMA Negeri 07 Surakarta
Authors: Sutanto Anita Rahmawati , Harenda Astried Pascafitri , Arsyi Myanda Azkya , Cahyani Suci Nur , Prayitno Baskoro Adi
Published: June 2021

Collaboration skills between students are needed to optimize learning outcomes. Collaboration skills in learning can allow students to exchange information and ideas with their friends, therefore can increasing students' understanding of a material. This study aims to determine the collaboration skills and find out the differences of collaboration skills on science students grade X, XI, and XII in SMA N 07 Surakarta. This study used survey method. Population of this study included all students of grade X, XI, XII, in total 600 students. Stratified proportional random sampling was used as sampling technique with a sample of 20 students at each grade. Student collaboration skills are measured using questionnaires. Data analysis used quantitative description analysis and ANOVA. The results of the study showed that the profile of the X, XI and XII science students' collaboration skills in SMA N 07 Surakarta was in the range of 70-74% or in the high category. There is no difference in the collaboration skills of science students of grade X, XI, and XII (α = 0.412> 0.05).
Peningkatan Hasil Belajar Siswa Melalui Pemamfaatan Lingkungan Sekitar Sekolah Sebagai Sumber Belajar pada Konsep ekosistem di kelas VII-2 SMPN 1 Percut Sei Tuan TP 2011/2012
Authors: Yohana Syofia
Published: June 2021

Tujuan penelitian ini adalah untuk mengetahui  peningkatan  hasil belajar siswa melalui pemamfaatan lingkungan sekitar sekolah sebagai sumber  belajar pada konsep ekosistem di kelas VII-2 SMPN 1 Percut Sei Tuan TP 2011/2012 Penelitian Tindakan dilaksanakan di  kelas VII-2 SMP Negeri 1 Percut Sei Tuan Jln.Besar Tembung Gang Pendidikan Kecamatan Percut Sei Tuan Kabupaten Deli Serdang. Penelitian berlangsung selama 3 bulan pada semester ganjil dilaksanakan sebanyak 2 siklus dengan mengemukakan 4 tahapan setiap siklusnya yaitu : tahap perencanaan, pelaksanaan, pengamatan dan refleksi. Analisis data hasil penelitian berupa data kuantitatif yang merupakan hasil belajar siswa (pre test dan post test) dengan cara persentase yaitu dengan menghitung peningkatan ketuntasan belajar siswa secara individual dengan nilai ketuntasan 75 dan ketuntasan klasikal sebanyak 85% dari jumlah seluruh siswa. Hasil tes siklus I, terdapat 16 orang siswa (42,10%) sudah mencapai ketuntasan belajar sedangkan 22 orang siswa (57,89%) belum mencapai ketuntasan belajar. Setelah diketahui ada peningkatan maka dilanjutkan memberikan tindakan pada siklus II Kemudian didapat hasil tes siklus II yang mengalami peningkatan dari 38 orang siswa, ternyata 33 orang siswa (86,84%) sudah mencapai ketuntasan belajar, dan hanya 5 orang siswa (13,15%) yang belum mencapai ketuntasan dalam belajar. Keaktifan siswa menunjukkan peningkatan yang sangat signifikan di lihat Pada siklus I tingkat keaktifan siswa berbeda, untuk pengamat I dan pengamat II mendapatkan 18 siswa (52,63%) yang berperan aktif. Demikian juga untuk keaktifan mencatat  ada 18 siswa (36,84%) siswa yang aktif.Siswa yang menangapi komentar teman ada 15 siswa (42,10%), Untuk siswa yang aktif mengamati dan mencatat ada 22 siswa (57,89%), untuk siswa prilakunya menyimpang dari KBM pengamat I dan II menemukan 8 siswa (21,57%) dan  pengamat I dan II menemukan 4 siswa  (10,52%) yang tidak mengerjakan tugas. Pada siklus keII pengamat I dan pengamat II mendapatkan 32 siswa (84,21%) yang berperan aktif, keaktifan mencatat  ada 28 siswa (73,68%) siswa yang aktif.Siswa yang menangapi komentar teman ada 27 siswa (71,05%), Untuk siswa yang aktif mengamati dan mencatat ada 25 siswa (65,78%), untuk siswa prilakunya menyimpang dari KBM pengamat I dan II menemukan 4 siswa (10,52%) dan  pengamat I dan II tidak menemukan  siswa  yang tidak mengerjakan tugas.
Pengaruh Model 3C3R Terhadap Kemampuan Literasi Sains Siswa Pada Konsep Interaksi Mahluk Hidup Dengan Lingkungan
Authors: Rahmawati Gendis Siti , Windyariani Sistiana , Suhendar Suhendar
Published: June 2021

This study aims to determine how the influence of the 3C3R learning model (Content, Context, Connection, Reading, Reasoning, Reflecting) on students' literacy skills after learning in the concept of interaction between living things and the environment. The sample of this study was grade VII students in SMP Negeri 13 Kota Sukabumi which were taken using a pusposive sampling technique with 24 students in the experimental class and 25 students in the control class. The instrument of this research is a matter of testing scientific literacy skills. This type of research is Quasi Experimental with a non equivalent control group design research design. The data analysis technique uses the t test with a significance level of α 0.05. The results of the t test show (tcount 6.845> ttable 2.051) so that H0 is rejected and H1 is accepted, meaning that there are significant differences in students' scientific literacy skills between the experimental class and the control group. So it can be concluded that the 3C3R learning model influences students' scientific literacy abilities.
Profil Keterampilan Regulasi Metakognisi Ditinjau dari Strata Angkatan Mahasiswa Pendidikan Biologi
Authors: Suwandi Roisyah Ashshaddiqah , Beauty Amelia Happy , Pujiyanti Sulis , Alfara Avis , Nurisma Fattahu Husna , Prayitno Baskoro Adi
Published: June 2021

This research aims to determine the profile of metacognition regulation skills and determine the differences in metacognition regulation skills of Biology Education students at one of the Universities in Surakarta based on the strata of the class. This research method uses a survey method. The research population was Biology Education students at one of the Universities in Surakarta consisting of 4 classes totaling 240 students. The research sample was obtained by stratified random sampling technique as much as 30% of the population, namely 18 students per class. The research data was obtained through a questionnaire that referred to the Metacognitive Awareness Inventory (MAI) with indicators of Metacognitive Regulations, including Planning, Information Strategy, Monitoring, Coordination Errors, Understanding Strategies, and Evaluation. Analysis of research data was carried out in quantitative descriptive and ANAVA test. The results of the research showed that the profile of metacognition regulation skills in each class averaged 79.51% with a well-developed category. The profile of the 2015 metacognition regulation skills is 77.80% with a category that has developed well, the 2016 class is 82.48% with a category that has developed well, the 2017 class is 79.81% with a well-developed category, and 2018 is 79, 97% with a well developed category. Skill in regulating metacognition of Biology Education students in Surakarta in 2018/2019 has developed well. The 2016 Biology Education students have the highest average metacognition skills with a score of 82.48%. ANAVA test results showed no difference in metacognitive regulation for each class with a significance value of 0.054.
Capaian Aspek Kompetensi Sains Siswa SMA dengan Pembelajaran Model Problem-Based Learning dan Cooperative Learning Tipe STAD
Authors: Amelia Trisna , Nevrita Nevrita , Rahmatina Desi
Published: June 2021

Science literacy is an essential element of science and technology learning. The mastery of science literacy drives people being competitive and worth employed, especially in the workplace where an employee is expected to be innovative. Globally the mastery of society's science literacy of Indonesian students was still low. Science literacy consists of 4 dimensions, namely context, science competence, knowledge, and science attitude. The science competency dimension becomes important to be achieved by the students as an indicator of the achievement of science literacy. Related to improving science literacy through components of learning strategy, based on various relevant research, in SMA Negeri 1 Tanjungpinang has been conducted a study to compare the achievement of science competency with Problem-based learning and Cooperative Learning (STAD type). To test whether there is a significant difference in the average level of science competency scores between the PBL class and the CL-STAD class in SMA 1 used Mann-Whitney test which shows a significant value of 0.000 < 0.05. These results show that there is a significant difference in the average level of science competency of the students X IPA class with the implementation of the PBL and CL-STAD in SMA 1 Tanjungpinang. The achievement of science competency in PBL class is higher than the achievement in CL-STAD class based on 3 aspects, namely: identifying scientific issues, explaining scientific phenomena, and using scientific evidence.
Efektifitas Problem-based Learning dengan Brainwriting berbasis Masalah Diversifikasi Pangan terhadap Kemampuan Berpikir Kritis dan Berkomunikasi Siswa
Authors: Arsanti Iis Aprilia , Subiantoro Agung Wijaya
Published: June 2021

This research aimed to examine the effectiveness of the implementation of Problem-based Learning with brainwriting method based on food diversification problem toward students’ critical thinking and communication skills. This was a quasi-experimental research using a non-equivalent pretest-posttest control group design, which involved two classes of 10th-grade student that selected by cluster random sampling, in a public high school at Bantul regency, Special Region of Yogyakarta. One class was managed as the experimental group, and another one was as the control group. The data of critical thinking skill were collected using an essay test instrument which analyzed using the Mann-Whitney U test, while communication skill data were collected through an observation protocol and analyzed descriptively. The findings of this research revealed that the Problem-based Learning instruction with brainwriting method was significantly more effective in developing students’ critical thinking and communication skills, as Mann-Whitney U test supported this result (p=0.00) as well as the descriptive analysis of the average scores of the skills. With this significance, Problem-based learning with the brainwriting method can be used as an example of a model and enrich the learning model implemented by teachers. These results are further discussed in this paper.
Pengaruh Metode Mind Mapping Terhadap Kemampuan Pemecahan Masalah dan Hasil Belajar Peserta Didik di Sekolah Menengah Atas
Authors: Nur Bella Gustiana , Suprapto Purwati Kuswarini , Suharsono Suharsono
Published: June 2021

This research is motivated by the ability of problem solving and student learning outcomes which are still low so that a learning method is needed mind mapping.This research was conducted to investigate the influence of mind mapping method of problem solving ability and the result student on ecology concept in grade Xth grade Math and Science at publich High School Tasikmalaya. The research was carried out in October 2019 until April 2020. The research method used was true experiment. The population of this research was all student of Xth grade Math and Science as many as 5 classes consist of 160 people. The samples taken used a cluster random sampling technique as many as 2 classes, namely Xth grade Math and Science 2 as an experimental class and Xth grade Math and Science 3 as an control class. The data collecting technique used the instrumen of problem solving ability and instrument result student on ecology concept carried out after the learning process. The data analysis technique used was Ancova Test (Analysis of Covariance) dengan bantuan software SPSS 23 for windows pada taraf signifikan (α) = 0,05. Based on rhe result of the study can be concluded that there is the influence of mind mapping method of problem solving ability and the result student on ecology concept in Xth grade Math and Science at publich High School Tasikmalaya. The mind mapping method can increase the enthusiasm and understanding of students about the concept of learning.
Pengaruh Model Pembelajaran Kooperatif Tipe Make A Match Terhadap Hasil Belajar Siswa
Authors: Meha Agus Maramba , Mbau Yusni W , Foeh Yonatan
Published: June 2021

The problem in this study is the low learning outcomes of class VII students of SMP Negeri 20 Kupang. This study aims to determine the effect of the Make A Match type of cooperative learning model on learning outcomes. The experimental research method used is the Posttest-Only Control Group Design. The population of class VII students was 253 students and the sample of class VIID and class VIIH was 54 students. Data collection using learning outcomes tests. Analyzed using t-test, assisted by SPSS For Windows version 23. Hypothesis test results obtained tcount 8,194> 2,00665 ttable at 0,000 significance or less than 0.05, indicating that there are differences in student learning outcomes between the control and experimental classes. It is shown by increasing students' understanding of the digestive system material, students look very enthusiastic in learning, have curiosity, and dare to express opinions during the learning process. Therefore, the Make A Match learning model has great potential in developing students' ideas on problem-solving in learning, as evidenced by the high percentage of student learning outcomes, namely C1 93.055%, C2 75.462%, and C3 73.765%.
Pengembangan Media Pembelajaran Ular Tangga Materi Sistem Peredaran Darah untuk Meningkatkan Hasil Belajar Peserta Didik
Authors: Ningsih Luthfi Rahayu , Harun Ismi Yunita , Rahmadiana Vina , Miarsyah Mieke , Hendi Rizhal
Published: June 2021

This research aims to developing snake ladder learning media in circulatory system material and knowing the effectiveness of snake ladder learning media on learning outcomes of science. This study uses Research and Development according to Borg and Gall and experimental tests with the design of pretest posttest control group design. Data obtained in the form of quantitative data and qualitative data. The results of validation by material experts were 85% (very feasible), by media experts at 81% (very feasible), and by linguists expert 77% (feasible), with an average overall score of 81% (very feasible). The results show that the snake ladder learning media on the circulatory system material is very feasible to be used in learning, as well as the snake ladder learning media on the circulatory system material effectively improves student learning outcomes.
Analisis Kesalahan Mahasiswa pada Penyelesaian Soal Mata Kuliah Anatomi & Fisiologi Manusia
Authors: Tendrita Miswandi
Published: June 2021

Human Anatomy and Physiology is one of the courses for biology students that is abstract so that not a few students have difficulty studying it. Errors in answering questions can be used as clues to determine the student's mastery of material. This study aims to determine student errors in solving problems in the Human Anatomy & Physiology course. This research is a qualitative descriptive study. The data collection method used is the test method. The subjects in this study were biology education students in semester V of the Nineteenth November University Kolaka Academic Year 2019/2020 who took Human Anatomy and Physiology courses. The instrument used in this study was the UAS test questions in the Human Anatomy & Physiology course. The results of the analysis showed that the most difficult questions for students to understand were questions on the function of the eye parts where the points obtained by nine students were only 2 points with the percentage of correct answers only 2%. While the questions on autoimmune disease material got the most correct percentage of answers where the number of points was nine students, namely 31 with a percentage of 34%. From the research results, it can be concluded that by analyzing student errors in answering questions, it can be seen what material is difficult for students to understand so that it can help lecturers to improve the learning process in the following semester.
Pengaruh Laboratorium Virtual Berbasis Problem Solving Terhadap Kemampuan Berpikir Kritis
Authors: Barus Ewi Mellysa , Panggabean Terry Noviar
Published: June 2021

The availability of facilities and infrastructure in learning Cell and molecular biology courses is needed to support the achievement of learning objectives. Based on the results of observations in the Imelda University, Pharmacy Department, the lack of implementation due to the lack of facilities and infrastructure that support the practicum causes a lack of improvement in students' critical thinking skills. The ability to think critically is the main factor affecting student understanding. In this case, the media that can support this is a problem solving-based virtual laboratory to encourage students' critical thinking skills. This study aims to identify the effect of a problem solving-based virtual biology laboratory on the critical thinking skills of students in the Pharmacy Undergraduate Study Program at Imelda University, Medan. The research design was one group pre-test posttest. Data collection was carried out starting in January 2020, followed by data processing and analysis. The sample in this study were all students of the first semester Pharmacy Department at Imelda University, totaling 63 people. The sampling technique in this study is total sampling. The statistical analysis used was one sample T-test. Based on the results of the discussion based on the problems and research objectives, it can be concluded that there is a positive and significant effect with p 0.00 <0.05 in the use of problem solving-based virtual laboratories on students' critical thinking skills in the cell and molecular biology courses at the Imelda University Pharmacy Department. With the virtual laboratory, students learn the principles of science in a fast, effective and fun way through virtual laboratory interactions and navigation.
Penggunaan Model Pembelajaran Collaborative Creativity Untuk Meningkatkan Kemampuan Berpikir Kreatif Siswa Pada Materi Pencemaran Lingkungan
Authors: Muzakki Naufal Ahmad , Sudargo Fransisca , Nurjhani Mimin
Published: June 2021

The 2013 curriculum applies a scientific approach in the learning proses, therefore students are expected to have higher order thinking skills, one of which is creative thinking. Students' creative thinking skills can be trained by implementing student-centered learning. The purpose of this study was to analyze the using of collaborative creativity learning model on students' creative thinking abilities on the topic of environmental pollution. The method used in this study was a quasi-experiment with a pre-experimental research type and one group pretest-posttest research design. The subjects in this study was class X science 8 Senior High School in Bandung. Creative thinking abilities measured in this study include four aspects: fluency, flexibility, originality, and elaboration. Data of students' creative thinking skills were obtained from the pretest and posttest scores. Based on the results of data processing, the creative thinking ability of students has increased after using collaborative creativity learning model with a gain index value of 0.31 in the medium category. This shows that the use of collaborative creativity learning model can improve students' creative thinking ability on the topic of environmental pollution. The benefit of this research is that the Collaborative creativity learning model can be used as a reference for learning in class.
PENGEMBANGAN PERANGKAT PEMBELAJARAN BERBASIS MASALAH UNTUK KEMAMPUAN VISUAL THINKING MATEMATIS DAN SELF EFFICACY SISWA KELAS VII SMP SWASTA RAJA GARUDA MAS BESITANG
Authors:   Program Magister Pendidikan Matematika, Universitas Negeri Medan, Rama Yunita Meli , Surya Edy , Syahputra Edi
Published: June 2021

Penelitian ini bertujuan untuk mendeskripsikan bagaimana: 1) validitas, kepraktisan dan keefektifan perangkat pembelajaran berbasis yang dikembangkan dan 2) peningkatan kemampuan visual thinking matematis dan self efficacy siswa terhadap matematika dengan menggunakan perangkat pembelajaran yang dikembangkan. Jenis penelitian ini adalah penelitian pengembangan. Model pengembangan yang digunakan adalah model Thiagarajan yang terdiri atas 4 tahapan. Penelitian ini menghasilkan produk yaitu Rencana Pelaksanaan Pembelajarn (RPP), Buku Guru (BG), Buku Siswa (BS), Lembar Aktivitas Siswa (LAS), Tes Kemampuan Visual Thinking Matematis dan angket self efficacy siswa terhadap matematika. Uji coba 1 dilakukan di kelas VII-1 dan uji coba 2 dilakukan di kelas VII-2 SMP Swasta RGM Besitang. Hasil penelitian ini menunjukkan bahwa: 1) perangkat pembelajaran valid, baik dari validitas isi maupun validtas konstruk, 2) perangkat pembelajaran praktis digunakan, dilihat dari penilaian validator dan respon positif siswa terhadap perangkat pembelajaran yang dikembangkan, 3) perangkat pembelajaran efektif, dilihat dari ketuntasan belajar dan aktivitas siswa, 4) peningkatan kemampuan visual thinking siswa berada pada kategori sedang dan 5) adanya peningkatan kemampuan self efficacy siswa terhadap matematika dari uji coba 1 ke uji coba 2.
PENGEMBANGAN PERANGKAT PEMBELAJARAN BERBASIS PENDEKATAN REALISTIK UNTUK MENINGKATKAN KEMAMPUAN PEMECAHAN MASALAH DAN SELF-CONFIDENCE SISWA
Authors:   Program Magister Pendidikan Matematika, Universitas Negeri Medan, Siregar Wirdayahni , Siregar Hasratuddin , Syahputra Edi
Published: June 2021

Penelitian ini bertujuan untuk mendeskripsikan: 1) Peningkatan kemampuan pemecahan masalah matematis siswa yang diberi pembelajaran dengan menggunakan perangkat yang dikembangkan berbasis pendekatan realistik dibandingkan dengan siswa yang mendapat pembelajaran biasa; 2) Keefektifan perangkat pembelajaran yang dikembangkan melalui pendekatan realistik terhadap kemampuan pemecahan masalah matematis; dan 3) Peningkatan self-confidence siswa yang diberi pembelajaran dengan menggunakan perangkat yang dikembangkan dengan menggunakan pendekatan realistik. Penelitian ini merupakan penelitian pengembangan dengan menggunakan model pengembangan 4-D. Penelitian ini dilakukan melalui dua tahap, yakni tahap pertama validasi perangkat pembelajaran kepada 5 orang validator, dan tahap kedua mengujicobakan perangkat pembelajaran yang dikembangkan menggunakan pendekatan realistik di kelas VIII-3 dan VIII-4 Mts. YAPNI Lubuk Pakam. Dari hasil uji coba I dan uji coba II diperoleh: (1) Terjadi peningkatan nilai rata-rata pada kemampuan pemecahan masalah matematis siswa yang diberi pembelajaran dengan menggunakan perangkat yang dikembangkan berbasis pendekatan realistik dibandingkan dengan siswa yang mendapat pembelajaran biasa, yaitu sebesar 13,89. (2) Perangkat pembelajaran berbasis pendekatan realistik efektif digunakan untuk meningkatkan kemampuan pemecahan masalah matematis; dan (3) Terjadi peningkatan self-confidence siswa dengan menggunakan perangkat pembelajaran yang dikembangkan dengan menggunakan pendekatan realistik.
PERBEDAAN KEMAMPUAN PEMECAHAN MASALAH DAN MOTIVASI BELAJAR YANG DIAJAR MELALUI MODEL PEMBELAJARAN KOOPERATIF DENGAN KONTEKSTUAL BERBANTUAN SOFTWARE GEOGEBRA
Authors:   Program Magister Pendidikan Matematika, Universitas Negeri Medan, Saragih Doni Irawan , Minarni Ani , Mukhtar Mukhtar
Published: June 2021

Tujuan dari penelitian ini adalah untuk : (1) menganalisis perbedaan kemampuan pemecahan masalah matematis siswa yang belajar melalui model pembelajaran kooperatif dengan model pembelajaran kontekstual berbantuan software GeoGebra, (2) menganalisis perbedaan motivasi belajar siswa yang belajar melalui model pembelajaran kooperatif dengan model pembelajaran kontekstual berbantuan software GeoGebra, (3) mengetahui apakah terdapat interaksi antara model pembelajaran dan gender siswa terhadap kemampuan pemecahan masalah matematis siswa, (4) mengetahui apakah terdapat interaksi antara model pembelajaran dan gender siswa terhadap motivasi belajar siswa, (5) menganalisis proses penyelesaian jawaban tes kemampuan pemecahan masalah matematis siswa yang belajar melalui model pembelajaran kooperatif dengan model pembelajaran kontekstual berbantuan software geogebra. Instrumen yang digunakan terdiri dari : (1) tes kemampuan pemecahan masalah matematis, (2) angket motivasi belajar. Analisis data dilakukan dengan analisis varians (ANAVA) dua jalur. Hasil penelitiaan menunjukkan : (1) terdapat perbedaan kemampuan pemecahan masalah matematis siswa yang belajar melalui model pembelajaran kooperatif dan model pembelajaran kontekstual berbantuan software GeoGebra, (2) terdapat perbedaan motivasi belajar siswa yang belajar melalui model pembelajaran kooperatif dan model pembelajaran kontekstual berbantuan software GeoGebra, (3) terdapat interaksi antara model pembelajaran dan gender terhadap kemampuan pemecahan masalah matematis siswa, (4) terdapat interaksi antara model pembelajaran dan gender terhadap motivasi belajar siswa, (5) proses penyelesaian jawaban siswa kelas model pembelajaran kontekstual lebih baik dibandingkan kelas model pembelajaran kooperatif.
Analysis of market forces as the basis for conducting the public procurement procedure to evaluate the effectiveness
Authors: Prodanova Natalia Alekseevna , Lazareva Anastasia Romanovna , Lazarev Artur Viktorovich , Sotnikova Lyudmila Viktorovna , Saradzheva Olga Vladimirovna , Shevchenko Olga Pavlovna
Published: June 2021

The article considers the change in the methodology for conducting public procurement and, as a consequence, a change in the methods for assessing efficiency. The main methodological problems at the moment, development prospects and elimination of current issues are considered. An approach that has found wide application in assessing the investment attractiveness of projects is presented, namely, the analysis of the driving forces of the market and the analysis of competition according to Porter. The chosen topic is one of the most relevant, since the definition of the driving forces of the market and the forces of competition allows more efficient use of the mechanisms for managing the state of its purchases.
On analysis of some factors of the sustainability of corporate business in the conditions of the covid-19 pandemic
Authors: Zhao Dong , Orekhov Sergey , Velikorossov Vladimir , Maksimov Maksim , Prodanova Natalia , Chernenkaya Liudmila
Published: June 2021

The presented article aims to identify the key factors that can influence the success of sustainable management of corporate structures in a pandemic and post-pandemic state of the business environment. In the practical sphere, the authors set tasks to develop practical methods that can increase the efficiency of cost management in the strategic horizon and form a system of key performance indicators that allows to adequately assess the results of the corporation's activities. According to the authors, this should be done in advance and consider the lessons learned from cost management in the context of the COVID-19 pandemic. The results were obtained while testing the hypothesis about the relationship between the strategic cost management system and the quality of corporate business. This hypothesis is rejected by the external approach to business quality but confirmed by the internal approach to business quality.
Assessment of the continuing education of employess and manager of the organization
Authors: Shcherbakova Olga , Velikorossov Vladimir , Filin Sergey , Rakauskiene Ona Grazyna , Yakushev Alexey , Prodanova Natalia , Balakhanova Dariko
Published: June 2021

Currently, new requirements are being put forward for personnel training: constant updating, expansion and deepening of the existing knowledge of workers, specialists and managers of all levels, and this article proposes a solution to the problem of assessing the continuous education of employees and managers of an organization. The hypothesis of this study is to prove the effectiveness of continuing education for employees and managers of an organization, its impact on the competitiveness of the latter in the context of the transformation of the world economy. It is concluded that the assessment of continuous training of personnel is necessary to establish how the organization benefits from training, or to find out whether the form of training used by the organization is effective. Research methods prioritized were - analysis, synthesis, generalization, systematization.This assessment allows you to constantly work to improve the quality of education, to exclude ineffective curricula and forms of education.
Artificial intelligence in the accounting profession
Authors: Kovalenko Svetlana Nikolaevna , Kalutskaya Natalia Alekseyevna , Bolvachev Aleksei Ilyich , Prodanova Natalia Alekseevna , Sotnikova Lyudmila Viktorovna , Shevchenko Olga Pavlovna
Published: June 2021

Accounting, classified as an information system, today in our world is aligned with information technology to expand its productivity capabilities. As information providers, accountants must improve the efficiency and productivity of their tasks and operations. Technological changes occur over time, and this has made accounting activities and tasks easier. The accounting profession has changed as a result of the evolution of accounting software, information technology, and the latest advances in artificial intelligence. Accounting practice is not the only beneficiary from the use of information technology, students, bodies and administrations within accounting have been effectively affected by the power of digital systems, the understanding of information systems and technologies, and their application in accounting education. Students will improve their understanding and practical ability to use technology and apply it to the accounting profession.
Angiotensin-converting enzyme 2: a key enzyme in key organs
Authors: Pagliaro Pasquale , Thairi Cecilia , Alloatti Giuseppe , Penna Claudia
Published: June 2021

2020 marked the 20th anniversary of the discovery of the angiotensin-converting enzyme 2 (ACE2). This major event that changed the way we see the renin–angiotensin system today could have passed quietly. Instead, the discovery that ACE2 is a major player in the severe acute respiratory syndrome coronavirus 2 pandemic has blown up the literature regarding this enzyme. ACE2 connects the classical arm renin–angiotensin system, consisting mainly of angiotensin II peptide and its AT1 receptor, with a protective arm, consisting mainly of the angiotensin 1–7 peptide and its Mas receptor. In this brief article, we have reviewed the literature to describe how ACE2 is a key protective arm enzyme in the function of many organs, particularly in the context of brain and cardiovascular function, as well as in renal, pulmonary and digestive homeostasis. We also very briefly review and refer to recent literature to present an insight into the role of ACE2 in determining the course of coronavirus diseases 2019.
Polish Textile and Apparel Industry: Global Supply Chain Management Perspective
Authors: Sadowski Adam , Dobrowolska Bogusława , Skowron-Grabowska Beata , Bujak Andrzej
Published: June 2021

The article presents changes that took place in the textile and apparel (T&A) industry in Poland in the years 2004–2020. To describe the changes, we adopted the supply chain management perspective, which allowed for a global view of the changes taking place. We discuss the basic characteristics, such as the size and structure of the industry, innovation, production value, and the use of information and communications technology (ICT). In the research, we used the databases of the Central Statistical Office (GUS) on the sold production of the T&A industry, as well as imports and exports. Our research shows that, at the level of basic characteristics, the industry is close to the European model. However, it is characterized by a smaller share of small companies in the structure of enterprises. The research showed an upward trend in the production of sold textiles and, to a lesser extent, apparel. At the same time, the operation of the Polish T&A industry is influenced by the import of finished products and raw materials from China, Germany, Bangladesh, and Turkey. The export is directed to the German, Czech, Romanian, and Ukrainian markets. The article provides an overview of the development trends in the Polish T&A industry in the broad context of international conditions.
Thermal Analysis of Heating–Cooling Mat of Textile Incubator for Infants
Authors: Mikołajczyk Zbigniew , Szałek Agnieszka
Published: June 2021

On the medical device market there are several types of stationary and portable incubators that can be used in the care of infants. The prototype of a textile incubator made as part of this work consists of five material layers. The textile incubator is equipped with a functional heating and cooling mat, which is made on the basis of 3D channeled weft-knitted fabric. Its function is to generate heat and maintain it inside the textile incubator or to cool the baby's body while using therapeutic hypothermia. The mat is equipped with hoses transporting the heating or cooling medium.

The mat, depending on variable input parameters, can emit heat in the range from 1.15 W to 86.88 W. In case of the cooling function, it can receive heat in the range from −4.32 to −27.96 W. This indicates a large adjustment range of the amount of heat supplied and received, which is a positive feature, and enables programming the heat balance to ensure comfort for the baby.

The analysis of temperature measurements on the mat surface confirmed that maximum temperature differences do not exceed 1.6°C.
Disputes over the place of ethics in Polish Marxist philosophy
Authors: Konstańczak Stefan
Published: June 2021

In the article, the author presents attempts by Polish Marxist philosophers to enrich Marxism with ethical issues. The initial absence of ethics in Marxism is associated with the ignorance of tradition related to their own formation. In the author’s opinion, only polemics with the competitive Lviv-Warsaw school forced Polish Marxists to take the issue seriously. That is why Polish Marxist ethics in its mature form was only established in the 1960s, and did not enrich Marxism itself, but rather indirectly contributed to the initiation of socio-political transformations in our country.
The main principles and values of professional teaching ethics and their application in education
Authors: Gluchmanová Marta
Published: June 2021

The author discusses professional teaching ethics and its main principles and values. The theoretical basis of the study is ethics of social consequences and, in its context, primarily the principles and values of humanity and human dignity, including their possible application in the teaching profession and, partially, in the process of teaching foreign languages and Slovak as a foreign language to students from abroad.
Stoic pragmatist ethics in the time of pandemic
Authors: Skowroński Krzysztof Piotr
Published: June 2021

The present paper is a response, of sorts, to the challenges of the coronavirus pandemic (COVID) and lockdown that we all must face. We have an idea of what doctors, nurses, teachers, among many of the other professions, do for the general public, but one may ask whether there is something substantial that philosophers and ethicists can offer in these circumstances. The thesis of this paper is that the stoic attitude towards times of trouble and the pragmatist way of finding out what is possible to elevate the quality of living against all odds, if skilfully interwoven, could be an important tool in keeping mental health in good shape and, additionally, could contribute to the cultural scene at large. If this is the case, stoic pragmatists can indeed offer an interesting example of practical philosophy for many audiences, especially during the pandemic lockdown and, perhaps, for other serious difficulties or problems. To be effective in delivering their message, stoic pragmatists, as most with philosophers today, should enrich their textual and oral modes of traditional transmission of knowledge and become digital-culture public intellectuals that can recognize and reach more general audiences by, among other things, visual modes of digital communication.
RETRACTED: Income Shocks and Child Mortality Rates: Evidence from Fluctuations in Oil Prices
Authors: Rivero Catalina , Acuna Pedro
Published: June 2021

Previous studies show that children in lower socioeconomic status families reveal higher rates of mortality. We complement the income-mortality literature by establishing a causal link between income and child mortality. Our instrument for income is based on time-series global shocks to oil prices combined with the cross-sectional share of employment in manufacturing across US states as their exposure to oil price changes. Using the universe of death records between the years 1975-2004, we find the OLS results of income-child-mortality relationships are under-biased. The 2SLS-IV results suggest that a $1,000 increase in income per capita at the state level reduces child mortality and infant mortality by 0.87 and 0.53 fewer incidences per 1,000 population of age-specific children.
The Economic Influence on Consumers Buying Behavior in Islamic Countries: Evidence from the COVID-19 Economic Crisis
Authors: Mukit Mohammad Mushfiqul Haque , Nabila Nusrat Jahan , Abdel-Razzaq Assim Ibrahim , Shaznin Kazi Fatema
Published: June 2021

The Covid-19 pandemic has ushered in a new age in the world. We are still grappling with the implications in various areas of our everyday lives. The impulsive buying habits of consumers, the supply chain, and the whole industry are not exceptions. Consumers and supply chains were both unprepared during the early stages of the novel coronavirus pandemic. The procurement of utilitarian products was referred to as panic buying. The study examined using exploratory studies on several individuals in the eight selected Islamic countries who have been panic buying in coronavirus-affected areas and have faced regional constraints. The data apply on exploratory factor analysis (EFA) in eight selected Islamic countries, three hundred sample finally selected, and a good number of volunteers supported in this study. The results have shown that a drastic financial effect on the economy where purchasing power and remittance inflow declined, inflation goes up and precaution for lockdown, whereas impulsive buying goods tendency increased due to misinformation, and panic buying immensely impact in the economy. The decision-making process has shifted, preventing financial burdening, rising saving patterns, and unwelcoming unhealthy consumption. Moreover, visible psychological distress, depression, anxiety, and post-traumatic stress. These studies concluded with a policy recommendation providing the results.
Does Railway Lines Investments Matter for Economic Growth?
Authors: Fosu Prince
Published: June 2021

The $20.81 trillion U.S. economy relies on a vast infrastructure network to thrive; however, empirical studies that examined that impact of infrastructure on economic growth in the U.S. are limited. This study’s principal objective was to examine the effect of railway lines on economic growth using annual data from 1980 to 2016 and cointegration analysis. The results showed a positive and significant impact of railway lines on economic growth in the long-run and short-run. The impulse response analysis indicates that shocks to railway lines initially cause GDP growth rates to increase and decrease continuously. The variance decomposition analysis also suggests that overtime, railway lines contribute largely to the variations in economic growth followed by inflation and population. This study’s outcome has important implications not only for the U.S. economy but also for developing and emerging countries. The results suggest that railway lines investments matter for economic growth in the U.S.
Tourism Economy. Mountain Tourism: Quantitative Analysis of Winter Destinations in Romania
Authors: Bacoş Ioan-Bogdan , Gabor Manuela Rozalia
Published: June 2021

The continuous development of mountain tourism derives from the multiple positive points that the mountain has in satisfying the particularly diverse tourist needs. The strong point is represented by the extremely valuable and complex tourist potential, as well as the variety of natural and anthropic resources. The complementarity of these resources makes the arrangement and development of winter resorts with a useful and attractive profile called ski areas to be more and more common in mountainous areas. The purpose of this paper is to analyze winter destinations in order to conclude whether Romania can create a competitive advantage based on this type of tourism, both at European and global level. We used statistical data for all Romanian resort for sky destination, respectively the total number of practicable kilometers, total number of cableway installations and the accommodation capacity. For the quantitative analysis we used the SPSS 23.0 statistical software and applied the following statistical methods: Person correlations, chi square test and Student’s t test for paired samples. The research results, obtained with statistical methodology, support and highlight the significant differences between the Romanian mountain resorts for winter activities.
A New Intuition into Tourism-Inclusive Growth Nexus in Turkey and Nigeria (1995 – 2018)
Authors: Osinubi Tolulope T. , Ajayi Adedoyin O. , Osinubi Olufemi B. , Olaniyi Clement O.
Published: June 2021

This paper examines the symmetric and asymmetric causal relationships between tourism and inclusive growth in Turkey and Nigeria over the period 1995Q1-2018Q4. The study employs a bootstrap simulation method with leverage adjustments to achieve the objective of the study. The method is used to see whether positive or negative tourism shocks cause inclusive growth and whether positive or negative inclusive growth shocks cause tourism activity. The results show no evidence of asymmetric causality between tourism and inclusive growth, while there is evidence of symmetric causality running from tourism to inclusive growth in Turkey. On the other hand, there is neither symmetric nor asymmetric causal relationship between tourism and inclusive growth in Nigeria. In sum, both neutrality and tourism-led growth hypothesis hold in Turkey, while Nigeria gives credence to neutrality hypothesis. The recommendations coming from the findings are that the tourism sector in both countries, Nigeria in particular, should be repositioned for better performance and effectiveness in stimulating inclusive growth. Rather than focusing on pro-poor and micro-based tourism policies that favour selected communities and localities, tourism should be included in development plans nationally, in order to ensure wider participation and more encompassing trickle-down effects on the citizenry. Furthermore, both countries should implement policies that will stimulate their tourism sectors for a larger and more significant contribution to real GDP.