bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design on-board data processing for double Langmuir probe on lean satellite
Authors: Suryana R , Tejumola T W , Kim S , Cho M 
Published: May 2021

Abstract
The explosive growth of lean satellites (small/micro/nano/pico) has positioned this class of satellites as a unique tool for space science missions. Langmuir probe is one of the most frequently used payloads to achieve space plasma measurement missions because of their low requirement in terms of system development, size, and relatively low power requirements to drive the mission. Double Langmuir probe can overcome the limitations of a single Langmuir probe measurement as reference ground in the satellite is not required. The limitation of data communication speed is one of the problems that always occur in the development of a multi-mission lean satellite. Data communication speed can be improved by using another system such as S-band or X-band, but those will be required for high power consumption. One of the solutions is the reduced size of the data by using on-board data processing on satellites. On-board data processing aims to improve data communication speed when sending DLP data to ground stations and how to determine plasma parameters. On-board data processing for a double Langmuir probe will be calculated electron temperature and electron density by using Raspberry PI zero. On-board data processing aims to reduce the size of data so that the time of transmission between satellite and ground stations will be shorter. On-board data processing can be a pragmatic solution because processed data only contains useful information according to user requirements.
Bacterial cellulose-rambutan leaf extract (Nephelium lappaceum L.) composite: preparation and characterization
Authors: Putra Ananda , Sari Reci Purnama , Nasra Edi , Yuniarti Elsa , Amran Ali 
Published: May 2021

AbstractThe purpose of this research is to produce bacterial cellulose-rambutan leaf extract (BC-RLE) composite. The BC-RLE composite was prepared by immersing BC gel into RLE under various immersion time of 7, 14 and 21 days with/without using UV light radiation, and then, its physical (water content, and swelling), mechanical (tensile and compressive strength) and structural (functional group and degree of crystallinity) properties were characterized. The results showed that the water content of BC-RLE composites was lower than that of pure BC gel and decreased as increased immersion time of BC gel in RLE. Further, the UV light radiation is given during immersion of BC gel in RLE also reduced the water content of BC-RLE composites. However, the swelling degree of BC-RLE composites increased as increased immersion time, and a similar tendency was also shown by applying the UV light radiation. Mechanical properties, tensile, and compressive strength of BC-RLE composites increased as increased immersion time and by applying UV light radiation. The FTIR results showed that there was no effect of UV light radiation on the structure of BC-RLE composites. The Degree of crystallinity of BC-RLE composite decreased by applying the UV light radiation during immersion time.
The effect of calcination temperature on the structure of iron oxide phase from west Sumatra
Authors: Fauzi Ahmad , Ratnawulan Ratnawulan 
Published: May 2021

AbstractThis research aimed to investigate the effect of calcination temperature on phase changes and the structure of iron oxide contained in iron ore from the area of West Sumatra. Complex geological regions in West Sumatra contribute to the characteristics of iron ore in the area. The calcination temperature used is 26 °C, 300 °C and 500 °C. The characterization tools used are X-ray powder diffractometer (XRD) and X-ray Fluorescence (XRF). The results of the analysis using XRF showed that this iron ore contained Fe content of 69.59% and after being purified at 87.50%. The results of the analysis using XRD indicate that the calcination temperature affects the iron oxide phase formed. At the calcination temperature of 300 °C, the iron oxide phase that appears is Magnetite, Hematite, and Maghemite. At the calcination temperature 500 °C the iron oxide phase that appears is Maghemite and hematite. The calcination temperature also affects changes in iron oxide structure. Structural changes that occur from cubic to cell units a = b = c = 8,3985 Å for Tetragonal structures with unit cells a = b 8,3460 Å and c = 25,0340 Å then to Rhombohedral structure a = b = 5,0320 Å and c = 13,7362Å.
Comparison of building understanding of students on newton’s laws with phenomenon-based ADI with assessment formative and ADI models
Authors: Parno  , Mufidah J , Diantoro M 
Published: May 2021

Abstract
The Newton’s laws cannot be separated from mechanics and real life phenomenon, but research is rarely done on improving understanding of Newton’s law through ADI-Phenomenon-AF. The purpose of the research was to compare the effectiveness between ADI-Phenomenon-AF and ADI models in building understanding of Newton’s law and describing students’ difficulties after the learning process. This study used a mixed method design with an embedded experimental design. The instrument of this study was Newton’s law Understanding Test in the form of reasoned multiple-choice questions with a reliability of 0.817. The research data were analyzed by Wilcoxon test, Mann-Whitney U test, N-gain, d-effect, and a description of the reasons for students’ answers. The results show that both models are effective in building students’ understanding, but the ADI-Phenomenon-AF model is more effective than the ADI model. After the learning process the students of both classes still have difficulty in analyzing the relationship between acceleration, force, and mass. In addition, ADI-Phenomenon-AF class students still have difficulty with the nature of force in Newton’s first law, while the ADI class analyzes the application of Newton’s first and second laws.
Validity of interactive student worksheets based on inquiry based learning models to improve knowledge competence
Authors: Samudra E YA , Yulkifli Y 
Published: May 2021

AbstractPhysics learning activities have not been carried out optimally as seen from the low competency of students’ knowledge. This is due to the lack of available teaching materials that fit the needs of students, the available teaching materials are very limited because they do not take advantage of technological developments and there is no model in them, so learning is not entirely student centered. Utilization of technology is one of the efforts to facilitate learning in accordance with the needs of students by developing non-printed teaching materials in the form of interactive student worksheet based on inquiry based learning models. The purpose of this research is to produce an interactive student worksheet based on a valid inquiry based learning model. This type of research is research and development using the ADDIE model. The method used in this research is descriptive statistics. The validity of the interactive student worksheet is assessed by three experts using a validity questionnaire. The validity of the interactive student worksheet is analyzed using the Aiken’s V. formula. The validation results show that the material validity aspect is 0.87; visual display 0.89; and learning design 0.85. Based on the analysis of the validity of interactive student worksheets data, an average of 0.87 is in the valid category. Thus, Interactive Student Worksheets based on inquiry based learning model can be implemented in physics learning to increase knowledge competence.
Validity of physics e-handouts based on the STEM approach to improve students’ knowledge competency
Authors: Yulia Sri Rahma , Pratiwi Yulia , Ramli Ramli 
Published: May 2021

Abstract
Physics e-handouts based on the STEM approach to improve students’ knowledge competence is able to facilitate students to increase knowledge optimally. Before using this e-handout, an e-handout feasibility test is needed. The purpose of validation is to determine the suitability of e-handout with physics learning material by using the Aiken’s V formula by 4 validators. Data collection by questionnaire method. Validation is assessed from 3 aspects, first the Material Substance Eligibility with a value of 0.80 is a valid category, secondly a visual display worthiness obtained of a value of 0.85 with a valid category. Third, the feasibility of the learning design obtained a value of 0.81 with a valid categorization. The overall conclusion is that the validity value of the physics e-handout based on the STEM approach is 0.82 with a Valid category. So that e-handouts are appropriate to be used in physics learning to improve the competency of high school students’ XI knowledge.
Mapping environmental curriculum in physics learning at senior high school grade X semester 2
Authors: Yusliani Erlina , Desnita  
Published: May 2021

Abstract
Global issues about the environment become a tranding topic and often heard in today’s era. There have been many reports of environmental damage occurring in Indonesia, ranging from floods, forest fires, waste handling problems, air pollution and landslides. So that it takes the care of the young generation for the environment from an early age by providing environmental education in schools. Environmental education given to students will have a positive impact, namely students are able to solve and prevent environmental problems they face. Environmental education will foster students’ environmental literacy. Environmental literacy is needed so that students are responsible and care for their environment. Therefore, it is necessary to instill environmental literacy in children from an early age through formal education, by integrating it in the learning process. One of them is by integrating through the subject matter that will be taught to students. The purpose of this research is to map the hidden environmental curriculum in the physics learning materials of senior high school grade X semester 2. This research is a descriptive study with a qualitative approach. This study describes the physics material for grade X semester 2 which contains environmental literacy. The data collection technique used in this research was through documentation study and the data analysis technique used in this study was the content analysis technique. The results of this study are in the form of an integrated environmental literacy matrix which can be used as a reference for physics learning tools.
Analysis of physics e-books assisted by application of learning house using quantum learning models to improve the 21st century skills of high school student
Authors: Sawitri Y , Asrizal A , Mufit F 
Published: May 2021

AbstractAt this time, known as the century of openness and globalization, human life has changed and is different from previous lives, this century is known as the 21st century. 21st Century is also known as the era of knowledge, which is all alternative efforts to meet the needs of life in a variety of more knowledge-based contexts. The 21st century education paradigm has experienced a shift marked by differences in learning orientations. The learning of the previous century emphasized literacy in reading, writing, and mathematics, in which in the 21st century they were used as the basis for developing new literacy, namely human, data and technological literacy which is very important to face the current and future globalization era. The problem found in the field is the low skill of students there are three. First, learning physics in schools is very theoretical and mechanistic. The learning process begins with an explanation of concepts accompanied by examples, followed by work on exercises in Physics questions. Secondly, schools do not arrange the learning environment. Third, students have difficulty learning physics. This is supported by the results of interviews with students that one of the subjects considered difficult is physics. This is caused by their ignorance of the benefits they get from studying physics. Based on the preliminary analysis conducted, the first it was found that Value Of Physics Learning is for the preliminary and closing components is 78 for preliminary activities and 78 for closing activities. The learning process delivered by the teacher should not only provide knowledge to students, but students who must build skills in their own minds. The results of the data analysis show that: the implementation of learning components and strategies using the quantum learning model in physics learning are grouped into sufficient categories, the use of e-books is that physics teachers have never used them, teacher only uses printed books or modules in learning. Therefore, the results of this study can be used as a basis for designing and developing the required physics e-book to increase student knowledge.
Preliminary study of physics e-module development using research-based learning model through smartphone to support digital learning in the revolutionary 4.0
Authors: Apriani M F , Yulikifli  
Published: May 2021

Abstract
The era of revolution 4.0 emphasizes the application of technology in life, including education. Example of the application of technology in education is digital learning which helps students teach technology to help them in the future. In physics learning, the use of technology is still not optimal. This is indicated by Physics learning materials used in schools that are still in print and learning activities are still centred on the teacher face-to-face. The spread of the Corona virus causes learning activities cannot be done face-to-face because not all schools are permitted to carry out learning activities. Therefore we need electronic learning materials that are able to improve the competence of attitudes, knowledge and skills of students even though not face-to-face. E-module with Research-based Learning model through smartphone is very appropriate learning material used to improve these three competencies and support digital learning. This study analyzes e-module development using Research-based Learning model in 10th grade physics subject on the first semester that discusses the analysis of needs, characteristics of students, materials and task analysis. Research method used is quantitative descriptive research with research sample are students of SMAN 10 Padang, SMAN 12 Padang and SMA Pertiwi 1 Padang.
Practicality of interactive multimedia of natural science integrated with the theme of motion in life using an integrated scientific approach to 21st-century learning
Authors: Kurniawati Annisa , Ratnawulan  , Fauzi Ahmad 
Published: May 2021

Abstract
This interactive multimedia was developed using a scientific approach and integrated with the characteristics that exist in 21st-century learning. The practicality test aims to assess the practicality of the interactive multimedia products being developed. The practicality test was carried out by distributing a questionnaire in the form of an instrument sheet for the practicality of the response of educators and the responses of students to 2 educators and 15 students. The data analysis technique to assess the practicality of the product is the Likert scale. The result is an Integrated Natural Science interactive multimedia developed with very practical criteria so that students and educators can use it in teaching and learning activities.
Preliminary research in the development of smartphone-based e-module learning materials using the ethno-STEM approach in 21st century education
Authors: Azis Hasbi , Yulkifli  
Published: May 2021

Abstract
Education is the most important aspect in building knowledgeable and skilled human resources in the field of technology and 4C Skills known as the 21st century learning paradigm. In addition, education based on local culture related to scientific fields also needs to be considered as it is hoped that the emergence of new knowledge adapted from the local culture. Physics learning should lead students towards the desired learning goals and the role of teaching materials can also influence this. This study aims to obtain information related to the application of smartphone-based E-module using the Ethno-STEM approach. This research is a descriptive study conducted through direct observation at 3 schools with the research sample being students of class XI MIPA and 2 physics teachers in grade 11th and used an instruments in the form of questionnaire and interview sheets. The results of the data analysis show that the application of the Ethno-STEM approach has never been applied in learning. The need for teaching materials that support learning has to be up-to-date, namely smartphone-based E-Modules. Due to this, it is necessary to carry out further research in the form of the development of a smartphone-based Physics E-Module using the Ethno-STEM approach.
Validity of physics edupark e-book with scientific approach based on tourism destinations of Rumah Gadang
Authors: Sadraini  , Rifai Hamdi 
Published: May 2021

Abstract
The 21st Century is known for being digitally based and technology that has an influence on learning. The curriculum 2013 seeks to perfect learning based on regional contexts and technology. Lack of integration of learning material with regional contexts and technology utilization makes it difficult for students to understand the concepts of physics. Teachers and students not yet using non-printed in learning material that integrated with the regional context. One of the solutions to this problem is that non-printed in learning material has been created in the form of e-book Edupark physics. The purpose of this study was to produce a physics Edupark e-book with a scientific approach based on tourism destination of Rumah Gadang with valid criteria. The type of this research is educational design research (EDR) using the Plomp development’s model. This stage called prototyping phase I to see the validity of the physics Edupark e-book that was designed. Validation was carried out by three experts, namely physicists, learning or display design experts, and linguists. The data analysis technique used Aiken’s V formula. Based on the results of the study, it can be concluded that the physics Edupark e-book with a scientific approach based on tourism destination of Rumah Gadang is very feasible, so that it is declared valid from the components of the material substance, learning design, display and language worthiness.
Validity and practicality of worksheet assisted by PhET interactive simulations to improve students creative thinking skills in a research based learning model
Authors: Chotimah C , Festiyed  
Published: May 2021

Abstract
Research has been carried out to determine the validity and practicality of the sheet using interactive simulations. This study aims to describe the validity and practicality of worksheets as a learning tool in research based learning model. The method used is descriptive analysis of quantitative data, the teachers response and the students responses to the questionnaire instrumen. The result showed that the validation of the students worksheet obtained an average score of 0,83 on the aspects of the feasibility of content, presentation, and language. The practical result obtained for the teachers response were 75% with the practical category and 81,70% for students responses with the very practical category. Based on the results of the developed phet assisted worksheets, it is stated that they are valid and practicality used in research based learning to improve the creative thinking skills of students at the high school.
Practicality of high school physics e-book integrated materials of meteor fall disaster mitigation based on guided inquiry model assisted google classroom
Authors: Alkadri Robika , Fauzi Ahmad 
Published: May 2021

Abstract
Learning media is a very important learning component who use by teachers for students in the learning process. The development of Information, Communication and Technology have big contributed for teachers to develop learning media as needed by students in learning. The purpose of this research is to analyze the media used by students in high school physics learning and to determine the right media in the development of flood-themed teaching materials. This research method is descriptive qualitative approach. Descriptive method is a method used to examine the condition of the natural objective.To obtain research data used questionnaire instrument. Instrument for retrieving data in the form of a questionnaire for analysis of learning media filled in by students. The result of the study showed that the use of learning media based on electronic can be used in physics learning and develop flood-themed teaching materials based on electronic.
Effects of science learning material of motion in daily life theme on new literacy of students
Authors: Yurnetti  , Asrizal  , Murtiani  , Usman E A 
Published: May 2021

Abstract
The 21st century demands education graduates have various skills. One of the skills needed is literacy skills. This literacy ability can be instilled in the learning process. However, the integration of literacy and the implementation of integrated science learning is still low. The solution that can be done is to develop science learning material by integrating new literacy. This study aims to determine the effect of using natural science learning material with the theme of motion in daily life integrated with new literacy on increasing the knowledge and skills of new literacy students of class VIII. This study used a before and after design with one sample group. The research subjects were 32 grade VIII students of SMP Negeri 1 Solok. The instrument for data collection consisted of two instruments. First, the knowledge aspect assessment instrument in the form of a written test consisting of 10 questions in the form of essay questions. Second, the skills aspect assessment instrument in the form of a performance appraisal sheet to assess students’ new literacy skills. The data analysis technique used descriptive analysis, normality test, homogeneity test, and correlated comparison test if the data were normally distributed and had the same variance. The Wilcoxon signed-rank test analysis is used if the data are not normally distributed and are not of the same variance. Therefore, an important result of this study is the use of science learning material on motion in daily life theme has a significant effect on increasing the knowledge and new literacy skills of grade VIII junior high school students at a 95% confidence level.
Assessing pre-service physics teachers’ competencies in designing photo-electric effect experiment using PhET simulation
Authors: Aminoto T , Pujaningsih F B , Dani R , Riantoni C 
Published: May 2021

Abstract
The advancement of learning technology requires that pre-service physics teachers should have adequate skills to integrate technology in the teaching and learning process. This study aimed to investigate the competencies of prospective physics teacher of Jambi University in designing the photo-electric effect experiment. This study used a mixed method approach with exploratory models. Ninety physics education students of Jambi university, having taken modern physics subject, were participated. Data were obtained from the students′ work of designing photo-electric effect experiment using PhET simulation. The students were asked to work in group, but the final report was done individually. Data analysis were done based on indicators of competencies to design a virtual lab activity. The indicators consisted of abilities to declare the objectives of experiment, compile the theoretical basis, and set up the procedure. The findings showed that the average ability of the prospective physics teacher in designing photo-electric experiment using PhET simulation was in the low category. Based on interviews, it was due to aspects of unfamiliarity with PhET simulation, technical problems related java player installation, insufficient of prior knowledge, and lack of skills in finding relevant information.