bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical analysis of transport properties of ZnO based Schottky diode
Authors: Ahmed Nosheen , Khan Azam , Hussain Mushtaque
Published: March 2021

Since numerical methods allow us to generate data faster than experimental methods in less time and with less effort, therefore in the presented work two well-known numerical methods known as Newton-Raphson and Gauss-Seidel were employed to compute electrical parameters of electronic devices at highly sensitive temperature from 300 K to 1000 K to discuss the significance of these parameters on the competency of devices. ZnO based Schottky diode has been considered due to the substantial properties of ZnO which are very crucial in the invention of high-quality devices.

The investigations were focused on exploring the consequences of highly sensitive temperature on electrical parameters like ideality factor, saturated current, donor concentration, built in potential and height of barrier of Schottky diode. All parameters were computed by applying Newton-Raphson and Gauss-Seidel method on well-known thermionic emission model and capacitance-voltage equations.
Improving the discretely modulated underwater continuous-variable quantum key distribution with heralded hybrid linear amplifier
Authors: Xiang Yong , Wang Yijun , Ruan Xinchao , Zuo Zhiyue , Guo Ying
Published: March 2021

The current investigation on continuous-variable quantum key distribution (CV-QKD) is mainly based on the optical fibre or the free space atmosphere channel, while the ocean, which covers most of the Earth, has not been well utilized. In this paper, we analyze the influence of depth and wavelength on the attenuation effect of seawater on light by using a model based on the concentration of chlorophyll-a, and propose an improved four-state underwater CV-QKD protocol with a heralded hybrid linear amplifier (HLA). Both homodyne detection with a phase-sensitive amplifier and heterodyne detection with a phase-insensitive amplifier are considered. Simulation results show that the introduction of the heralded HLA can effectively extend the secure transmission distance of the key. Besides, when the transmission distance is relatively long, the secret key rate of the protocol is higher than that of the protocol without HLA.
Fine-grained uncertainty relation for open quantum system*
Authors: Han Shang-Bin , Li Shuai-Jie , Zhang Jing-Jun , Feng Jun
Published: March 2021

The fine-grained uncertainty relation (FUR) is investigated for accelerating open quantum system, which manifests the celebrated Unruh effect, a crucial piece of the jigsaw for combining relativity and quantum physics. For a single detector, we show that the inevitable Unruh decoherence can induce a smaller FUR uncertainty bound, which indicates an additional measurement uncertainty may exist. For an open system combined with two detectors, via a nonlocal retrieval game, the related FUR uncertainty bound is determined by the non-classical correlation of the system. By estimating the maximal violation of Bell inequality for an accelerating system, we show that the FUR uncertainty bound can be protected from Unruh decoherence, due to quantum correlation generated through Markovian dynamics.
Importance of resistivity on edge-localized mode onset in spherical tokamaks
Authors: Kleiner A. , Ferraro N.M. , Diallo A. , Canal G.P.
Published: March 2021

We explore the impact of realistic plasma resistivity on the linear stability of peeling-ballooning (PB) modes in tokamak discharges with low-aspect ratio. For this study we consider discharges that are subject to edge-localized modes (ELMs) in the National Spherical Torus Experiment (NSTX). Employing the state of the art extended-magnetohydrodynamic (MHD) code M3D-C1 it is demonstrated that non-ideal effects can significantly affect PB stability thresholds in NSTX discharges. In particular, robust resistive PB modes are found to exist well before the ideal PB stability threshold is met. These novel results can explain why ideal-MHD theory often does not accurately describe ELM onset in spherical torus configurations, and also present a valuable basis for the development of a predictive model for ELMs in low-aspect ratio tokamaks.
Comparison of divertor behavior and plasma confinement between argon and neon seeding in EAST
Authors: Li Kedong , Yang Zhongshi , Wang Huiqian , Xu Guosheng , Yuan Qiping , Guo Houyang , Eldon David , Hyatt Alan , Humphreys David , Chen Meiwen , Wu Kai , Liu Jianbin , He Tao , Yang Qingquan , Lin Xin , Xu Jichan , Meng Lingyi , Ding Fang , Chen Xiahua , Luo Yu , Wu Jinhua , Duan Yanmin , Luo Guang-Nan , Wang Liang
Published: March 2021

The exhaust of excessively high heat and particle fluxes on the divertor target is crucial for EAST long-pulse operation. In the recent EAST experiments, stable partial energy detachment around the upper outer strike point with H
98,y2 ∼ 1 was achieved with either Ne or Ar seeding from the upper outer divetor target in the upper single null configuration with ITER-like tungsten divertor. With either Ar or Ne seeding, the electron temperature around the upper outer strike point (T
et,UOSP) was maintained at around 5 eV, the peak temperature of divertor target surface around the upper outer strike point (T
div,UO) decreased significantly, and material sputtering was well suppressed. It was observed that there was less Ar seeding needed for partial energy detachment onset than Ne seeding, which shows that Ar is more efficient in the cooling of T
et on the upper outer divertor than Ne. However, there was no detachment on the upper inner divertor with T
et around strike point (T
et,UISP) remaining >10 eV with either Ar or Ne seeding from the upper outer divertor. Accompanied with the disappearance of double peak phenomenon of ion flux density on the upper inner divertor target (j
s,UI), the peak T
div,UI around the strike point increased to around 300 °C. Although the heat flux on the upper inner divertor target (q
t,UI) is still in the acceptable level, either Ar or Ne seeding only from the upper outer divertor target is not enough to protect the upper inner divertor target from sputtering under current EAST conditions. On the other hand, Ar seeding always causes confinement degradation in the partial energy detachment state. It was observed that there is a slight confinement improvement (∼10%) with Ne seeding, which may be due to density peaking, dilution effects and stabilization of the ion temperature gradient mode.
Experiment data-driven modeling of tokamak discharge in EAST
Authors: Wan Chenguang , Yu Zhi , Wang Feng , Liu Xiaojuan , Li Jiangang
Published: March 2021

A neural network model of tokamak discharge is developed based on the experimental dataset of a superconducting long-pulse tokamak (EAST) campaign 2016–2018. The purpose is to reproduce the response of diagnostic signals to actuator signals without introducing additional physical models. In the present work, the discharge curves of electron densityne, stored energyWmhd, and loop voltageVloopwere reproduced from a series of actuator signals. ForneandWmhd, the average similarity between the modeling results and the experimental data achieve 89% and 97%, respectively. The promising results demonstrate that the data-driven methodology provides an alternative to the physical-driven methodology for tokamak discharge modeling. The method presented in the manuscript has the potential of being used for validating the tokamak’s experimental proposals, which could advance and optimize experimental planning and validation.
Views and practices of mathematical method for physics lecture at pre-service physics teachers
Authors: Sujito  , Pratiwi H Y , Soewono E , Suhandi A , Liliasari S
Published: March 2021

The aim of study is to investigate the lecture process of Mathematical Method for Physics. The model is to develop the concept and ability of mathematical logical thinking of students of Physics Education Study Program. Mathematical Method for Physics is used to study physics related to how to systematically find out about nature. The research subjects consisted of 2 lecturers, and students who had taken Mathematical Method for Physics Courses, namely levels 3 and 4. The number of students filling out questionnaires was 94 students. Observations were conducted in class. Observations are focused on the learning process in the class. Data was collected using questionnaires to get student responses to the implementation of lectures. The results of the study were as many as 57.82% of students gave positive statements about the implementation of lectures, while the rest gave negative statements. This shows that studying physics is not only mastery of a collection of knowledge in the form of facts, concepts, or principles, but also an inquiry process. Therefore, the challenge in facing the 21st century is to improve the quality of education. Learning innovation is adjusted to the demands of educational change in the era of industrial revolution 4.0 (millennial). Learning must utilize information, communication, and technology (ICT). Innovation requires the support of a learning process that can strengthen creativity through critical thinking skills.
Design and validation smart teaching materials oriented multiple intelligences on global warming (STM2I-GLOW): Rasch model analysis
Authors: Rosa I S , Liliawati W , Efendi R
Published: March 2021

STM2I-GLOW is a web-based teaching material that is oriented to multiple intelligences in one of the physical materials, namely global warming. This study discusses web-based teaching materials that provide opportunities for students to study wherever students are. In addition, STM2I-GLOW can help students to improve their intelligence so that concepts of global warming can be used through the type of intelligence students have. This article presents the results of the STM2I-GLOW design and validation. A combination of quantitative and qualitative research methods is used in research. The design of the mixed method was chosen for the STM2I-GLOW implementation process in research at one school in Bandung. The instrument used was the STM2I-GLOW validation sheet. The assessor agreed five experts to assess three aspects, namely the media aspect, material aspects and conversation aspects. Validation test using the output menu 10. Items (columns): to order in the MINISTEP software for analysis with Rasch. The results obtained are in two categories in every aspect of the media, material aspects, and aspects that are approved in the category of accepted and rejected compilation of MNSQ clothing values that are installed in the MINISTEP free tool when analyzed using Rasch. The conclusion is that STM2I-GLOW is expected to be used in learning and makes it easy for students to discuss global material according to the type of intelligence of each student.
Evaluation of science process skills of high school students in Tapaktuan City on static fluid material
Authors: Harja M , Sinaga P
Published: March 2021

This descriptive qualitative research aims to evaluate the profile of students’ physics process skills. This research was conducted at a secondary school in the city of Tapaktuan. The population in this study were all students of class X MIPA SMA in Tapaktuan. The sample in this study was grade X MIPA 3 students who tested 20 people. Data collection techniques were used in this study through a multiple choice test instrument. Profile of high school students ‘science process skills in Tapaktuan City, it can be concluded that: the average high school students’ science process skills in Tapaktuan City are low (less), 0% are in the high category, 25% are in the medium category, and 75% are in the low category. The achievement of each aspect of skill varies. In the aspect of observation, classification and interpretation of good categories, aspects of prediction, hypothesis, selection of variables, conducting experiments and communicating are in the sufficient category, while in aspects of asking questions, planning experiments and applying concepts are in the lacking category. The science process skills of high school physics students in Tapaktuan for each aspect of science process skills are still low, with an average percentage of 48.9%.
Identification of critical thinking: suku (supik and kulub) on electricity material in Jambi Province
Authors: Hendriyani D , Siahaan P , Samsudin A
Published: March 2021

The world of education is in line with advances of science and technology, the facilities obtained by students and the ability to teach teachers in training students to think critically are factors that influence differences in the level of critical thinking students. The purpose of this study was to determine the differences between supik and kulub critical thinking skills. The type of this research was a survey study that illustrated how differences in students’ critical thinking skills in a region of Jambi province. The participants consisted of 6 female students, commonly called “SUPIK” and 4 male students, who were usually called “KULUB”. The average student involved comes from the Malay ethnic group, the native Malay ethnic group from Jambi Province. The research instrument used was a test of critical thinking skills. The results of this survey research showed the differences in the ability of supik and kulub critical thinking skills in one region of Jambi Province in learning electricity. This study has limitations because the number of samples used is so small. So, the need for further research by involving more sample and to see in more detail the causes of differences in the critical thinking abilities of supik and kulub.
MATLAB-based physics calculator: alternative for learning media for work and energy concept
Authors: Sumarni R A , Juliardi M , Widiyatun F , Astuti I A D , Okyranida I Y , Bhakti Y B
Published: March 2021

Physics concept makes students less understanding of differential equations of the concept of business and energy. Learning about basic physics about effort and energy can be done with the MATLAB program in the form of a physics calculator by simulating physics formulas. This research uses development research methods (R&D) with 4D development model (Define, Design, Development, and Dissemination). Matlab-based physics calculator are created using Matlab software through a multimedia development format that formula, simulation and theory. The test of the product response was applied on 29 the students. The response items were measured using the Likert scale from 1 to 4 scales. The analysis technique was descriptive statistics. For media expert validation assessment is 3.43 and for material expert validation is 3.64. Overall the result of student response analysis indicates that this physics calculator is good (3.21 out of 4) for use in learning. Basic physics learning with the help of an MATLAB-based physics calculator can help students understand their coursework in a simulated form.
The application of the Rasch Model to evaluate MET for the mastery of microscope concept
Authors: Barus C S A , Siahaan P , Suhendi E
Published: March 2021

Mastery of concepts was essential for further floating into higher thought processes. This research aims to determine the level of mastery microscope concept in high school students by using the MET (Microscope Essay Test). Mastery of concepts was described through cognitive processes described from indicators of competency achievement. The instrument was developed in the test items and non-tests with a validity of 0.66, which was applied to 24 students consisting of 14 girls and 10 boys in one of Bandung’s private schools. Data were analyzed using the Rasch model with the Winstep software. The results of this study show that the ability to explain and illustrate the function of the Microscope is very high, but aspects of determining the magnification of C4, the length of the C5 Microscope, and the design of the Microscope included in the category are very low. Mastery of Microscope Concepts with MET (Microscope Essay Test) analysis, based on the Rasch model, can be recommended to Educators to use learning models that can improve students’ mastery of concepts.
Design and validation of six-tier astronomy diagnostic test instruments with Rasch Model analysis
Authors: Utari G P , Liliawati W , Utama J A
Published: March 2021

Misconceptions occur because students answer problems with explanations that are not in accordance with scientific concepts and are confident in their choice of answers. Identification of misconceptions is an important first step to uncover understanding of learning. The six-tier test was developed from a four-tier test by adding two questionnaire sources of choice of answers to see how the causes of misconception. This study aims to design and validate misconception diagnostic test instruments on Astronomy material. The research method uses mixed methods with the instruments used namely the six tier Astronomy diagnostic test sheet for aspects of reveal, answer, synchronize, relationship, clear, EYD and corresponding. Appraisers numbered four experts to assess the construct and contents of the test instruments. The validation test uses multi-rater test analysis on MINIFAC and MINISTEP software to be analyzed with Rasch. The results obtained from the six-tier Astronomy diagnostic test validation analysis are the suitability of the items fulfilling the appropriate category. Item validity assessment items obtained that the questions can be accepted in all aspects. The conclusion is that the six tier Astronomy diagnostic test instrument is appropriate for identify misconceptions on Astronomy.
The development of 5E-POW (predict-observe-write) learning model assisted by virtual simulation to reduce the quantity of high school students’ misconceptions on fluid topics
Authors: Saputra O , Setiawan A , Rusdiana D , Muslim  , Izzuddin M A
Published: March 2021

This study was aimed by the number of students who were experiencing misconception on the Fluid Topic. Therefore, it requires a learning method that is able to facilitate students to learn which is Marked by a student misconception into a scientific misconception. the purpose of this study is to develop an existing learning models to reduce the quantity of students’ misconception. this research includes mixed methods research with embedded experimental model approach that combine qualitative and quantitative research procedures in one study to solve the problem. the priority of the model is quantitative, with qualitative data attached to methodology. A number of research subjects in the readability test of student worksheets (LKPD) were 5 (five) students in one high school in West Bandung Regency. the research subjects for the trail treatments and devices were 25 students in one high school in Central Sulawesi. the implementation of research subjects consisted of 25 students in one of high schools in Central Sulawesi province. the instruments used for this study were Four-Tier Diagnostic Test and Questionnaire to determine students’ response about the program being developed. The developed learning model has syntactic: engage, explore (predict-observe-write), explain, elaborate and evaluate (5E-POW). It can be declared that based on the data analysis of the average value N-gain on conception acquired by 77.05% and the decrease on the average quantity by -47.45% the conclusion derived from the data obtained is that research has also successfully developed a 5e-pow model with virtual simulations to decrease the quantity of high school student misconception on the Fluid Topic.
Systematic review of physic laboratory skills assessment instruments based on PhysPort with Nvivo
Authors: Efendi R
Published: March 2021

To help educators and researchers related to the availability of standardized physics laboratory skills assessment instruments, so this article is here to present systematically review various physical laboratory skills assessment instruments to provide information and their needs for various forms of physics laboratory skills assessment instruments. This study was conducted with a systematic review method, through identification, evaluation and interpretation of Physics-based database laboratory physics assessment instruments using Nvivo version 12 plus. A systematic review was carried out on the themes informed by PhysPort, including the instrument’s name, developer, purpose, format, duration, focus and level of instrument’s use. The results of systematic reviews report the results of synthesis, so that similarities and between instruments are found. The review results show that there are similarities and differences in aspects of the purposes, format, duration, focus and level of use.
Transposition of a sphere’s volume based on didactic phenomena
Authors: Puspita E , Turmudi  , Rosjanuardi R
Published: March 2021

Concerns about mathematics learning are rarely associated with life contexts, giving ideas to teachers and researchers developing didactic phenomenon-based learning. Didactic phenomenology is defined as a bridge to study mathematical concepts. Unfortunately, the use of didactic phenomena still leaves problems when formalizing the idea, including the concept of spherical volume. The qualitative method was chosen with a didactic phenomenological design, to explore the transposition of spherical volume construction, to strengthen the results of didactic phenomena based learning. By utilizing didactic phenomena and assuming students know the surface area of the sphere informally, the spherical volume can show. Formally with the concept of the volume of a rotating object and double integrals can be proven the volume of the sphere. With the idea of vector and limit the surface area and volume of the sphere can be determined as students know it. Further studies need to do regarding research collaboration mechanisms that involve teachers and academics so that the efforts of teachers in utilizing various didactic phenomena have a foundation of thinking that can be scientifically justified.
The effectiveness of blended learning on students’ critical thinking skills in mathematics education: a literature review
Authors: Sukma Y , Priatna N
Published: March 2021

Critical thinking skills (CTS) is one of the required competencies in the 21st century. Using technology in this era is a common thing including in education. One of the learning methods assisted by technology is blended learning. In this study, the effectiveness of blended learning on students’ CTS will be analyzed. The method used in this study was a literature review. There were view steps to investigate the effectiveness of blended learning on students’ CTS namely providing the definition of blended learning, finding information about essential elements in blended learning, then synthesizing some previous studies on the implementation of the method to improve students’ CTS and connecting the studies with blended learning. Based on the literature review result, the implementation of blended learning in Mathematics had the potential to improve students’ CTS. This study could provide an overview of the problems and opportunities to implement blended learning in schools.
Identification of math teacher’s capabilities in classroom action research
Authors: Palobo M , Tembang Y , Pagiling S L , Nur’aini K D
Published: March 2021

Classroom action research (CAR) is very important to be carried out by a teacher. However, it was found that very few teachers conducted classroom action research. This research is quantitative descriptive. The research aims to identify the teacher’s initial ability to carry out the practice of classroom action research. The research subjects were math teachers of the Merauke consisting of 60 teachers. Data collection techniques using interview, questionnaire and observation methods. Analysis of research data with data reduction methods, data presentation and conclusion drawing. The results showed that 73% of teachers had never carried out CAR, 27% had implemented CAR. Most teachers, 85% said that CAR is very important and must be carried out by every teacher. There are still very high teachers who find it difficult to implement CAR, which is 81.7% with average difficulties for the CAR title component (30%) and Library (23.3%). The main need that is urgently needed immediately is mentoring CAR theory understanding (41.7%), proposal preparation assistance (36.7%) and CAR practice assistance (20%). The training model desired by the teacher is a workshop (40.1%) and practicum (31.8%).
Students’ errors in solving the connection cluster problem: a case study on space and shape content
Authors: Fitri K A , Jupri Al
Published: March 2021

The ability of Indonesia student is still low in solving space and shape problem. It shows that the student gets the difficulties in solving the connection cluster of Programme for International Student Assessment (PISA) particularly in space and shape content. In this study, we carried out a small-case study on analysing student error in solving space and shape problem in connection cluster problem using Newman’s Error Procedure (NEP). We conducted this study for 53 students from two schools. There were three steps in carrying out this study; selecting PISA problem, answering the problem, and interview. Three problems were selected and translated to Indonesia. The students answered the problems for 15 minutes. Then the interview was conducted to clarify the student answer related to the error. It was done only for 4 students who got the difficulties and error in solving the problem. In this research, we found that most of student error was occurred in comprehension and transformation process. Therefore, only a few of students did error for process skill and encode the problem. For future study, we suggest to continue the research about the student conceptual understanding in mathematics.
Student spatial visual in geometry: the case of gender differences
Authors: Yurmalia D , Hasanah A
Published: March 2021

Spatial Visual, a mental representation in depicting visual information, is one of important ability in solving geometry problems. This study aimed to investigate student spatial visual ability and analyze it by gender. A total of participant involved in this research was 30 junior high school students at grade seven. There were three steps in this research. First, we chose two reflection questions from spatial visual assessment by Ramful, Lowrie, and Logan. Next, we interviewed some of students by semi structure interviewed. Finally, we analyzed student spatial visual comparing to types of visualization by Hegarty and Kozhevnicov and analyzed by gender. We found that generally the students had a lack in spatial visual ability because their pictorial representation, however boys had better spatial visual ability than girls.
Mathematics learning trough e-learning during pandemic covid-19 in grade 9 of a junior high school in Bandung
Authors: Fikriah D , Darhim  , Prabawanto S
Published: March 2021

Since March 11, 2020 the WHO has determined that the covid-19 pandemic is a global pandemic. Most countries in the world are affected by this pandemic, including Indonesia. Covid-19 pandemic has an impact on all aspects including the educational aspect. Limiting social interaction is an anticipation made to reduce the spread of the corona virus. In this case the teaching and learning activities in schools are eliminated, as an alternative, most of the learning is done by e-learning. In this context the research aims to find out mathematics learning through e-learning during the covid-19 pandemic, starting from the preparation of teachers and students, implementation, and evaluation. The research was done in grade 9 of a Junior High School in Bandung. The method used in this research was qualitative with a case study design. The results of the research are: (1) some applications such as WhatsApp, Google Classroom, Zoom, and Google Form can help students to learn mathematics. (2) learning through e-learning can run optimally if the teacher continues to coordinate with the homeroom teacher, learn about platforms in the use of e-learning, and becomes a creative teacher. (3) virtual board is an important platform for learning mathematics.
The impact of problem based learning model through e-learning on students’ critical thinking ability
Authors: Martyaningrum I D , Juandi D , Jupri A
Published: March 2021

This research is motivated by long distance learning and the importance of critical thinking ability. Several previous studies relating to critical thinking ability were about understanding students’ critical thinking ability based on gender and students’ characteristics of lower and upper group critical thinking ability. However, almost no research could be found on students’ critical thinking ability who have learned with problem-based learning model through e-learning and students’ characteristics of middle critical thinking ability. Therefore, this study aims to identify students’ critical thinking ability who have learned with problem-based learning model through e-learning. The method in this study was qualitative with case-study approach. We gave a learning with problem based learning model through e-learning and a written test to 36 students on 8th grade students of one junior high school in Banyumas, Central Java. Then, we conducted interviews to 2 upper group students, 2 middle group students, and 2 lower group students. The results show that the students with upper, middle, and lower group critical thinking ability have different characteristics in each indicator of critical thinking ability. Meanwhile, the student who have learned with problem-based learning models through e-learning dominant in middle group critical thinking ability.
Geometrical thinking of junior high school students on the topic of lines and angles according to Van Hiele theory
Authors: Rahayu S , Jupri A
Published: March 2021

Unconsciously, we use the concept and skill that we learned from the result of doing math questions, because the laws of mathematics govern everything. We can shaping up mathematics with geometry. Furthermore, this study aims to analyze geometrical thinking of junior high school students on the topic of lines and angles according to Van Hiele theory. This research use qualitative method with subject of research were four junior high school students in Bandung District, Indonesia. The data collection technique were used test and interview. The result showed that students with high abilities were at level 1 (analysis), and students with medium and low abilities were at level 0 (visualization).
Investigation of Watson-Glaser critical thinking skills of junior high school students in solving mathematical problems
Authors: Aiyub  , Suryadi D , Fatimah S , Kusnandi
Published: March 2021

This study aims to: (1) describe the critical thinking skills of junior high school students in solving mathematical problems and (2) identify the components of students essential sub-skills of thinking in assumptions, argument evaluation, deduction, information, and inference. This is a descriptive study with a qualitative approach. Data collected through tests and interviews, triangulation is done by comparing the test and interview. This study involved eight research subjects taken by random sampling from class VII, one of the junior high schools in Pidie Jaya Regency. The test used in this study consisted of eight problems representing five critical thinking skills sub-skills. The results of data collection analyzed through data reduction, data display, and conclusion drawing. The results showed that: (1) junior high school students critical thinking skills were in a low category; (2) deduction, information, and inference are the lowest critical thinking sub-skills mastered by students compared to other critical thinking sub-skills.
The effect of using group investigation learning model and prior knowledge toward student problem solving skills on Mathematics subject at junior high school
Authors: Angriani V , Darto  , Zein M
Published: March 2021

Towards the 21st century, technological and social change has developed rapidly. Educational practices must develop as well over time. The role and function of mathematics becomes an inevitable need. In order to meet the needs in adapting to these changes, problem solving is one of the mandatory skills that must be mastered by students. Problem solving skills are influenced by several factors, including learning models and student abilities. Therefore, this article aims at investigating whether a difference in mathematical problem solving skills emerges between the students involved in the learning group investigation learning model and those in the direct learning model, according to the high, medium, and low initial skills of 8th grade students of a junior high school (SMP) in Pekanbaru. The quasi-experimental method was used in the study. Based on the t-test analysis, the use of group investigation learning model in terms of initial skills, in general, influences the students’ mathematical problem solving skills.
Students’ mathematical communication in teams games tournaments (TGT) learning model on trigonometry topic
Authors: Kholidah N , Qohar A
Published: March 2021

This study aims to observe the result of students’ mathematical communication in a Teams Games Tournament (TGT) type cooperative learning model. This study uses a qualitative descriptive method in which the result of the observation and investigation of the students’ mathematical communication will be described. This research subjects were the first semester college students of class A in school year 2019/2020. There were 30 students who were taking the Trigonometry learning material in the Mathematics Education study program of Math and Science Faculty in Universitas Negeri Malang. The learning process was done by applying the TGT type cooperative learning method. The results of this research showed that the learning model had a positive influence on most of the students’ mathematical communication, especially on their oral and written mathematical communication aspects. On the oral aspect, on average, the students had a good communication skill with several indicators as follows: grammatical skills; sociolinguistic skills; and strategical skills. The students were expected to have a mathematical thinking and reasoning skills. Whereas on the written aspect, the indicators were as follows: interpreting mathematical ideas rationally, changing mathematical problems into mathematical models, and expressing mathematical ideas in the form of a description. From the results of this study, it was obtained that most of the students had good written mathematical communication skills. It can be concluded that the TGT learning model had a positive influence on the students’ mathematical communication skills.
The impact of the COVID-19 pandemic on mathematics learning in higher education during learning from home (LFH): students’ views for the new normal
Authors: Tyaningsih R Y , Arjudin  , Prayitno S , Jatmiko  , Handayani A D
Published: March 2021

Covid-19 Pandemic has an impact on education that is bringing up new policies for learning from home. The purpose of this study was to determine students’ views on learning mathematics in higher education while learning from home and its sustainability towards a new normal. This type of research is qualitative with data collection techniques using online surveys and interviews. Respondents in this study were 169 students of Mathematics Education in Higher Education. The results of this study indicate that 100% of lectures are conducted online with a composition of 34.32% in the form of Asynchronous Online Course, 19.53% Synchronous Online Course, and 46.15% using Hybrid Online Course. The effectiveness of online course that has been carried out was obtained 7.1% very effective, 20.1% effective, 53.8% sufficient, 17.8% less effective, and 1.2% ineffective. Open questions are provided in the questionnaire to allow students to convey constraints/difficulties experienced during Learning from Home (LFH), including network constraints, health problems, costs, the environment, course constraints, and time problems. Student responses regarding the application of the Blended Learning method in the new normal period showed 48% agreed, 31% were doubtful, and 21% disagreed.
Application of blended learning with Edmodo based on POE learning model to increase students understanding of science concepts
Authors: Alamsyah M , Marhento G , Siburian M F , Astuti I A D , Bhakti Y B
Published: March 2021

The process of science teaching in Junior High School in Jakarta is still using conventional method, so that students are passive. Utilization of technology and the internet is less effective, whereas facilities and infrastructure in school completed. This study aims to determine the application of blended learning with edmodo based on POE (Predict-Observe-Explain) learning model. The method used in this research is the quasi-experimental method with the research design of The Randomized Post-Test Only Control Group Design, which involved 202 students as samples. Sample determination used the random sampling cluster technique. The subject in this study were lesson plan, edmodo platform, and student’s worksheet. The instrument test consists of understanding of students concept. The data analysis technique is Paired Sample T-test. Based on the results of research, application of blended learning with edmodo based on POE (Predict-Observe-Explain) learning model can improve understanding of students concept. The students were more active and highly motivated in learning science.
The profile of science teachers’ competence in learning practices using technological devices
Authors: Permana R A H A , Widodo A , Setiawan W , Sriyati S
Published: March 2021

Teacher assessment is part of the evaluation and improvement process of teacher competence. Accurate assessment will be an appropriate basis for developing competency improvement programs. This research is aimed at getting a picture of the knowledge of science teachers in applying learning using technological devices. A descriptive analysis research method was used. The test result data were obtained from 100 science teachers in Banten Province who answered the questions online as the sample. The research instruments consisted of 10 essay questions and a scoring rubric for the assessment. Test questions cover aspects of the application of learning methods, learning media, learning resources, assessments, and student learning outcomes. The Cronbach’s instrument reliability coefficient value is 0.7. The average score of the test-takers in this research was 29.90 with a standard deviation of 17.31. Based on the categorization of the assessment results, the scores of the subjects were distributed as follows: 1% of the good category, 10% of the fair category, 40% of the poor category, and 49% of the very poor category. The analysis of the items indicates that the most difficult problems to be answered are the questions about learning methods and student learning outcomes.
Analysis of critical thinking skills in microbiology learning through mini project assignments during the Covid-19 pandemic
Authors: Nurtjahyani S D , Pratiwi L D , Sukisno
Published: March 2021

Covid-19 pandemic has colored a new order of learning in Higher Education, from conventional learning towards online and offline learning. Learning in Higher Education is expected to improve students’ critical thinking skills. Learning microbiology that the material is learned about microorganisms so it needs analysis of thinking skills, so with a contextual-based approach. The assignment of a mini research project as an alternative to improve critical thinking skills. The purpose of this study was to analyze the critical thinking skills of students giving mini research project assignments on microbiology learning during the Covid-19 pandemic. The method in this study was descriptive qualitative. The results showed students’ critical thinking skills in the ability to identify and the ability to evaluate very well a number of 11 students (100%) got a score of 4 (the highest score) while the ability to link a number of 9 (81.82%). Conclusions in the research assignment of mini research projects could improve critical thinking in the ability to identify and evaluate problems in the category is very good.
The effect of multiple intelligence theory based teaching towards students’ achievement on electrical circuit topic
Authors: Kalimaya S , Feranie S , Agustin R R
Published: March 2021

The research aims to identify the effect of implementing multiple intelligences theory based teaching towards students’ achievement on electrical circuit topic. Totally 66 of 8th grade junior high school students were selected through convenience sampling technique as experimental group subjects of this research. The experimental group was instructed to learn through multiple intelligences theory based teaching as the treatment in learning electrical circuit topic. This experimental study lasted for 6 meetings in 6 weeks and conducted using one group pre-test and post-test design. To evaluate the effect of the treatment on students’ achievement, an achievement test about electrical circuit topic which consisted of 24 items was distributed and analyzed using SPSS. The result showed that normalized gain value was 0.28 which categorized as a low improvement. In other word, students’ achievement on electrical circuit topic improved after being taught by multiple intelligences theory based teaching.
Analysis of teacher’s ability in planning and implementing learning on vibration, wave and sound submaterials
Authors: Azizah N A , Sukarmin S , Masykuri M
Published: March 2021

Submaterial vibration, waves and sound in junior high school science learning has high complexity. Teachers must not only master the material, but also they must be able to plan and implement the learning process. This study aims to analyze the ability of teachers to plan and implement learning on vibration, wave and sound material. This research is descriptive with a qualitative approach. The data collection techniques involved assessment of the lesson plans and observation of learning implementation to obtain the primary data. The secondary data are sourced from lesson plans, teacher and student interviews. Data were qualitative analyzed. Based on the analysis of the learning process shows that (1) the ability of teachers to make lesson plans in terms of format in accordance with aspects of the assessment of IPKG-1 with a score of 79.97% in the category is quite good. Lesser lesson planning indicators include learning objectives, methods, and procedures. learning plan (RPP) is not in accordance with the syllabus (2) the ability of teachers to apply is in accordance with aspects of the assessment of IPKG-2 with a score of learning implementation of 79.5% in the good enough category. Indicators of poor learning implementation are directing students to 21st century skills and lack of application of basic competencies.
Virtual experiment of simple pendulum to improve student’s conceptual understanding
Authors: Wijaya P A , Widodo A , Muslim
Published: March 2021

The main purpose of this study is to figure out the effectivity of virtual laboratory on improving student’s conceptual understanding related to simple pendulum topic using PhET simulation. The study involved 75 students of Junior High School that grouped into 3 cluster (rural, suburban, and urban area). The result of pre-test and post-test based on 24 multiple choice questions in general revealed that the virtual experiment affects the improvement of student’s conceptual understanding with  value classified into low to medium gain. Unexpectedly, the results of sample in rural area got highest gain compared to others.
Gender differences in science learning: how is students’ questioning quality through STEM based e-module?
Authors: Nurramadhani A , Lathifah S S , Yamin
Published: March 2021

Science learning in this century has highly demanding for students’ outcome. Higher order thinking skills has become a main goal for science educator. Higher order thinking skills include critical thinking skills. creative thinking skills, argumentative skills, inquiry skills and others. Inquiry skills or questioning skills is highly important for students in science learning to construct that skills, students should have a curiosity. Learning strategy, method, and approach must be effective to promote it. One of them is STEM learning which is covered in technology such as electronic books. So, that this research using STEM based E-module to construct students questioning skills. However, there are differences of learning style, reading habit, and others between girls’ and boys’ students which effect their skill. Purposes of this research is to investigate how the question quality of girls’ and boys’ students using STEM based E-module in science learning. The method that is used pre-experimental with subject 26 students, 24 girls’ students and 2 boys’ students as freshman in second semester who take science courses in environmental theme. The technique to take the data in this research is used recording activity from Free Conference Call applications, reading test, and observation. The instruments such as transcript from WhatsApp application chatting group, Free Conference Call application recording activity, questionnaire, and “Pojok Inquiry” activity which is linked in STEM based E-module that consist of five reading material or narration for each sub-theme. Data analysed by using question quality category rubric. The results shown that there is difficulty to investigate significant differences of question quality between boys’ and girls’ students obviously. However, there are interesting results of the questions quality category results of girls’ and boys’ students. Boys has outperformed in understanding, relationship, and evaluation category than girls’ students, while girls’ students have outperformed in information, finding & solution than boys’ students.
Implementation of education for sustainable development and pupils’ sustainability consciousness in Adiwiyata School and ESD-based school
Authors: Suwarto R S , Sanjaya Y , Solihat R
Published: March 2021

Education for Sustainable Development (ESD) is important to be developed in Indonesia to support the achievement of Sustainable Development Goals (SDGs). The lack of identification in implementing ESD lead to the lack of a representation of ESD in Indonesia. This research aims to identify and to analyze the ESD implementation models that are applied in Adiwiyata school and ESD-based school in Indonesia and how the pupils’ Sustainable Consciousness are. Respondents involved in this studies are 27 pupils from both schools. Observation, interview and SC Likert-scale questionnaire with 51 statements were used as the instruments. The questionnaire consisted of environmental, social, and economic dimensions that considered pupils’ knowingness, attitude and behaviour. The results show that the ESD implementation model that refers to Burmeister & Eilks (2012) conducted by Adiwiyata and ESD schools consisted of 2 models. Model 2 with Adding Sustainable Science as Content in the Science and Technology Curriculum and model 4 with Science Education as a Part of ESD-Driven School Development. The pupils’ SC in the environmental dimensions of pupils in Adiwiyata schools have significant different with ESD-based schools. But, for the results of the pupils’ SC in the Economic and Social dimension have no significant different.