bluuebunny/crossref_metadata_2025 huggingface dataset:
Tube catalyst (TKplus) to crack gasoline fuel vapor in motor vehicle
Authors: Erdawati  , Meta Sari Alvika , Priyatno Sugeng , Ilmar Ramadhan Anwar
Published: May 2020

This study aims to test ability the catalyst tubes to reduce exhaust emissions, save fuel and increase power and torque engine on vehicle. The catalyst tube named TKplus. TKplus catalyst tube filled with NiFe2O3 which was created with sol gel method and calcined on temperature 600°C, characterized by XRD, FTIR, SEM EDX, and BET test. Exhaust emission test results show motor vehicles equipped with TKplus can reduce CO2 emissions; between 36% - 48%, and CO2 emissions fall between 7% - 42%, decrease fuel consumption by 23% - 33%. Dyno test shows that in the presence of TKplus engine performance increased compared with engine without TKplus. At the revolving round of the engine at 5781 rpm or at a speed of 120 km/h, the power value increased by 5.8% and the torque value increased by 7.8% compared to the vehicles not equipped with TKplus value.
Magnetic susceptibility of pre- and post caldera lavas from Maninjau, West Sumatra
Authors: Fadila M R , Rifai H , Ningsih E D , Putra R , Maisonneuve C B de , Forni F , Eisele S , Phua M
Published: May 2020

Lake Maninjau was formed after a caldera forming eruption ∼50,000 years ago. Eventhough this eruption is one of the biggest Quarternary eruptions on Sumatra, it is not studied in detail so far. Only few attempts to study the volcanic processes have been carried out, mainly focusing on stratigraphy, physical volcanologoical parameters and geochemical characterization of volcanic rocks around the lake but the magnetic susceptibility of the pre- and post caldera lava have not been studied. Identification of the magnetic susceptibility of rocks can be done by using Bartington Magnetic Susceptibility Meter type MS2B. This study aims to determine the concentration of magnetic minerals based on the value of magnetic susceptibility in rocks. The Magnetic susceptibility data can be used as initial characteristics to understand the volcanic processes in the past and explain the environmental changes processes. The magnetic susceptibility values obtained ranged from 967.8 × 10−8 m3/kg - 2187.0 × 10−8 m3/kg. This Range indicates that the sample is estimated to be dominated by ilmenite (FeTiO3). Further frequency dependent susceptibility (χfds%) defined as ratio of magnetic susceptibility measured with difference frequency ranges less than 1%. Our results show all the samples are virtually no superparamagnetic and generally dominated by multi-domain (MD) grains.
Preliminary study of inert gas flow analysis on thermal systems with natural convection conditions
Authors: Anshari R , Mairizwan  , Asrizal A , Akmam A
Published: May 2020

Coolant circulation in a thermal system can pass through two circulation pathways, namely natural circulation and forced circulation. Both types of circulation each have advantages and disadvantages. Forced circulation requires special equipment to be able to supply pressure at the beginning of the coolant circulation. If this special equipment fails to function, it can lead to failure of the cooling process and can be fatal to the system that is run. As with natural circulation, this circulation does not require special equipment to drain the coolant. Coolant flow naturally by utilizing different densities of coolant. For systems that work where the axial flow is in the vertical direction, there is an influence of the coolant gravity which affects the coolant flow. This study aims is to analyze how the inert gas flow patterns that occur in a thermal system that applies natural circulation, in this study the focus of the study is on the coolant with the gas phase. This research is a type of experimental research. The analysis was conducted using descriptive and numerical analysis methods. The results of the analysis have been obtained, then applied to a thermal system that applies natural convection to the gas flow. The results of the analysis and application of this study are expected to provide meaningful input for the development of coolants in thermal systems and specifically in cooling systems for gas-cooled reactors. The results of preliminary studies that have been carried out have obtained basic benchmarks that can be used as guidelines for analyzing the physical conditions of the inert gas flow in the heat system by setting some standard conditions found in thermal systems that are generally used today.
Analyzing magnetic susceptibility and elemental composition of rocks and soil around Danau Diatas, West Sumatra, Indonesia
Authors: Fajri Rizki Nurul , Putra Rizaldi , Afriyeni Pika , Maisonneuve Caroline De , Phua Marcus , Eisele Steffen , Forni Francesca , Rifai Hamdi
Published: May 2020

The rocks on the surface of the earth have different formation process, beginning with the lava of volcanic activity that flow on the surface of the earth and then cool down forming igneous rocks. Rocks derived by volcanic eruptions contain different types of minerals than those formed by sedimentary or metamorphic processes. The aim of study was to evaluate the relation of magnetic susceptibility with the elemental composition of rock and soil around the Danau Diatas. Magnetic susceptibility was measured using Bartington susceptibility meter MS2B and the element composition has been measured by X-Ray Fluorescence. The values of magnetic susceptibility of low frequency (χlf) obtained for rock are 2332×10−8 m3/Kg, 2161,7×10−8 m3/Kg, and 2791,6×10−8 m3/Kg, while the values of magnetic susceptibility of low frequency (χlf) obtained for soils are 802,4×10−8 m3/Kg, 779,8×10−8 m3/Kg, and 58,4×10−8 m3/Kg. Rock and soil samples contain several elements such as Fe, Mn and Ti, with Fe having the highest concentration and thus the highest potential influence on their magnetic susceptibility.
The electrical properties of NiFe2O4-PVDF nanocomposite prepared by sol-gel method
Authors: Fadli Alia Hanafia , Yulkifli  , Darvina Yenni , Hartono Ambran , Ramli Ramli
Published: May 2020

NiFe2O4 nanocomposite is a soft magnetic material with low saturation coercivity and magnetization but has high electrical resistivity making this material suitable for electric field applications. The purpose of this study was to determine the effect of NiFe2O4 composition on the electrical properties of NiFe2O4-PVDF nanocomposites prepared by the sol-gel method. Nickel Ferrite nanocomposites - polyvinylidene fluoride (NiFe2O4-PVDF) are made using the sol-gel method and then grown using a spin coating device on a glass substrate. NiFe2O4-PVDF nanocomposites are characterized using X-ray diffraction (XRD) which aims to determine the crystal system, whereas to determine the electrical properties of nanocomposite resistivity Four Point Probe are used. Based on the research conducted on the electrical properties of the NiFe2O4-PVDF nanocomposite, the resistivity value of the NiFe2O4- PVDF nanocomposite with variations in the composition of the PVDF used 10:10, 10:20, and 10:30 was 36.66913333 Ohm.m; 55,63242667 Ohm.m; and 20,85797333 (Ohm.m). While the results of the resistivity values of the nanocomposite NiFe2O4-PVDF with variations in the composition of NiFe2O4 used 10:10, 20:10, and 30:10 are 36,69613333 Ohm.m; 12.07853333 Ohm.m; and 9.616773333 (Ohm.m). It can be concluded that the greater the variation in the composition of NiFe2O4 and PVDF, the resistivity value decreases.
Analysis of potential earthquake energy in the sianok segment
Authors: Raeis Muhammad , Syafriani S
Published: May 2020

Earthquakes are natural disasters that often occur and can harm the people in West Sumatera-Indonesia. One that makes West Sumatra prone to earthquakes is due to the existence of the Sianok segment. In this segment, there was an earthquake on March 3, 2,007 with a magnitude of 6.4 MW. Therefore the writer wants to calculate the amount of potential energy in this segment and the stress local conditions that exist in this segment. The data used is secondary data sourced from the earthquake catalog of the National Earthquake Information Center U.S. Geology Survey (NEIC / USGS) with an observation period of 1992 - 2016. Earthquake data used in this paper is M > 3.5 and h ≤ 70 Km. The processing of potential energy data uses the least square statistical and the local stress analysis is seen based on the a-value and b-value processed using the maximum likelihood calculation. The results of statistical calculations performed on the Sianok segment, the potential energy size for the Sianok segment is as much as 5.3763×1020 ergs since the March 2007 earthquake and the amount of the a-value and b-value in the Sianok segment is 4.51 and 0.808 ± 0.1.
Identification of magnetic minerals in peatland at the section of DD REP B 693 lake Diatas using XRD (X-ray Diffraction)
Authors: Afriyeni Pika , Rifai Hamdi , Maisonneuve Caroline Bouvetde , Forni Francesca , Eisele Steffen , Phua Marcus , Putra Rizaldi
Published: May 2020

Volcanic ash is dispersed into the air when an eruption occurs, whilst the magma that reaches the surface of the Earth cools to form igneous rocks before eventually breaking down to form sedimentary rocks. One of the places where the sedimentation of volcanic ash occurs following eruptions are peatlands. This study aims to determine the type of magnetic minerals contained in the peat at Lake Diatas. The identity of the magnetic minerals was determined using the X-Ray Diffraction method. The samples used in this study are taken based on depth of the peat core where a value of magnetic susceptibility had been measured previously. The results of the x-ray diffraction analysis for each sample obtained are the diffraction angle (2θ), distance between fields (dhkl
), diffraction intensity (I) and relative intensity. Data from this measurement are then compared with magnetic mineral data bases in order to identify the identity of the magnetic minerals within the peat. Analysis of the results obtained using X-Ray Diffraction indicate the identity of the magnetic minerals in the peat samples at Lake Diatas. The dominant type of magnetic mineral is magnetite (Fe3O4), along with othermagnetic mineralssuch as hematite. Magnetite diffracts at 18.3773°, 30.9888°, 31.5036°, 53.6169°, 65.7656°, 78.6261°, hematite at 65.9474°, 75.1103°, 78.8619°, while non-magnetic minerals such as quartz diffracts at 28.0575°, 28.2029°, 52.4150°.
The effect of jogging exercise to improve hemoglobin levels
Authors: Sepriadi  , Jannah Khainur , Eldawaty
Published: May 2020

A low level of hemoglobin is one of the health and fitness issues often experienced by anyone including students. If a student experiences a disorder of Hemoglobin levels, his physical fitness will be affected. The study aims to examine the effect of jogging exercise to improve students’ hemoglobin levels. A quasi-experiment method was employed in this study. The population of this study is a group of students of the Faculty of Sports Science, Universitas Negeri Padang. The samples of this study were 20 students obtanined by purposive sampling technique. The data of hemoglobin levels were measured by the cyanmethemoglobin method. Jogging exercises were carried out 18 times with a frequency of 3 times a week. The results of the study were analyzed statistically using a comparison test (t-test) at a significance level (α) of 5%. The results of this study indicated that the average of hemoglobin level of respondents before being treated was 14.18, while after being given treatment, it was 15.66. This means that there is a significant effect of jogging exercise on increasing students’ haemoglobin level (Hb), with value of tobserved (3.80) > ttable (1.73).
Development of digital based vertical jump test instruments
Authors: Prabowo Andika , Ihsan Nurul , Barlian Eri , Welis Wilda
Published: May 2020

The purpose of this research is to develop a digital Vertical Jump measuring instrument. This is because so far there are often errors in data collection related to the ability of leg muscle explosive power that is done conventionally. Resulting in a conclusion that is less valid. And therefore it is necessary to develop an instrument based on digital leg muscle power that is effective in its use and is economically efficient. This research is a development study with a design model adapted from Borg & Gall. Samples of Faculty of Sport Science (FIK) students of Padang State University, amounting to 10 people for small groups and 40 people for large groups, and 6 experts as validators as a validation tool. Data was collected using a questionnaire and trial tool. Through the validity of the product moment test and the reliability test, Test and Retest. The process of developing and testing this tool was carried out with the validation of experts by using a questionnaire as an instrument of validation and the results obtained an average percentage of 91%, the results of small group trials obtained a correlation level of 0.98 and the reliability test with direct trials of 0, 99 with the category of reliability is very strong.
Preparation of TiO2 thin layer on ceramics using dip coating method for degradation humic acid
Authors: Maurani Rohadatul Nadya , Purnamasari Devi , Zainul Rahadian
Published: May 2020

TiO2 thin layer on ceramic with dip coating method and photocatalyst activity test in humic acid. One of the photocatalysts used for the degradation of humic acid is TiO2 because TiO2 has several advantages, including non-toxic, stable, high activity, relatively inexpensive and environmentally friendly. This study was performed using TTIP as a precursor and MEA as an additive in isopropanol. Addition of MEA influences the stability of the titanium oxane solution. Ceramics were coated in a 0.5 M TiO2 solution by a dip coating method, then dried in an oven at 110°C for 10 minutes and difugeice at 400 ° C for 2 hours. Maximum degradation of 0.5 M TiO2 is 59.94% over 24 hours using 8 watt fluorescent lamps with 4 TiO2 coatings on ceramic.
Study of dynamically catalytic system on humic acid phototranformator
Authors: Djasli Yuni Aulia , Purnamasari Devi , Zainul Rahadian
Published: May 2020

This research was conducted using a phototransformator reactor which was used to degrade humic acid with photocatalysts of calcined CuO plates for 1 hour at 4000C. This reactor is designed in hexagonal shape made of glass with a thickness of 3 mm which has a rotation with speeds of 1000, 1500 and 2000 rpm, in this reactor filled with 200 mL of humic acid. The light source used is direct sun, the catalytic process is carried out through the process of degradation of humic acid using a reactor. The time variations used are 1, 2, 3, 4 and 5 hours. Absorption of visible light of humic acid before and after degradation was 265 nm. The results show that in direct sunlight the highest average value of %degradation is 55.66% at a velocity of 1000 rpm
Development of connected massive open online course (cMOOCs) based on multimedia for thermodynamics subject to improve students’ self-directed learning outcomes
Authors: Serevina Vina , Raihanati  , Andriana Wawan , Maynastiti Dewi , Tinura Virgiana
Published: May 2020

This research aims to develop a connected Massive Open Online Course (cMOOCs) based on multimedia for thermodynamics subject to improve students’ self-directed learning outcomes. Self-directed learning is for students to improve skill, gain achievement and knowledge, or self development and taken by self effort with any methods in any situation; ability to determine a learning goal, take an action to achieve that goal and evaluate learning effectivity of learning and learning outcomes. cMOOCs is an open online course that is free for many users to participate. This research subject is Thermodynamics related to heat and calor, temperature, thermodynamics laws, and energy exchange. This research method used ADDIE model with the following steps: Analyzing, Designing, Developing, Implementing, and Evaluating. Research was conducted in Physics education departement, State University of Jakarta for six months, started from October 2018 until April 2019. Students’ self-directed learning outcomes improvement test was conducted by pre-test and post-test in two classes (class A and class B) with n-gain result of class A by 0.75 (high) and class B by 0.34 (medium). Results of validation test showed score 93.33% for material validation, 92.59% for media validation, and 92.60% for learning validation. It can be concluded that developed cMOOCs can improve students’ self-directed learning outcomes.
Analysis of interactive media integrated natural science with energy themes in the life of using integrated types that integrate of learning for the 21st century
Authors: Ariani Rizka , Ratnawulan
Published: May 2020

21st Century Learning is learning that integrates literacy skills, knowledge skills, skills and attitudes, and mastery of ICT technology. Teacher professional competency demands on 21st Century learning must have the skills to be a model of how to learn and work by demonstrating proficiency in technology and transferring knowledge to technology, and collaborating with students and colleagues in using various relevant tools and resources to drive the success of technological mastery innovation. To face the challenges of the 21st Century, Integrated Science interactive media should be able to describe the skills expected in 21st Century learning. The preliminary study carried out aims to analyze the basis in the design of interactive science media integrated with the theme of energy in integrated type life of integrated learning in the 21st century. Research will be conducted using descriptive type research and qualitative approaches. In this study the researchers chose a sample of students at SMPN 11 Padang. Data through questionnaires and interview sheets are primary data that will be used in this research. The results of the analysis state that learning media are needed to help students possess critical thinking skills integrated in 21st century learning.
Analysis of student preparedness levels in facing flood disasters for development of high school physics digital books (e-books) with flood theme
Authors: Putri Gema Eferko , Fauzi Ahmad
Published: May 2020

West Sumatra is a potentially large flood area, where the city of Padang is one of the cities in West Sumatra that has a number of sub-districts with high flood vulnerability. To reduce the risk of flooding that occurs in Padang required a good level of preparedness from the community in facing flood disasters. Preparedness faces the problem of flooding can be improved through education in schools. The aim of this research to describe the extent to which students’ preparedness in facing flood disasters and the results of research analysis will be a reference in the development of the High School Physics e-book with flood theme. The method used in the research is descriptive method with collecting data in the form of student questionnaires consist of five indicators of flood disaster preparedness. The results of the analysis show that the level of preparedness of students in facing floods is relatively low. These results indicate that the development of the high school Physics e-book flood theme needs to be done.
Analysis of interactive media integrated natural science by the motion themes in life using integrated connected type 21st century learning
Authors: Kurniawati Annisa , Ratnawulan
Published: May 2020

Interactive Media could make effective learning, efficient learning, and easy understanding for the students. We need the interactive media development for integrated natural science that reflects the expected capabilities to face the challenges of the 21st century. The study is aimed to analyze the interactive media development for integrated natural science by a motion theme in life using integrated learning connected type in the 21st century. A preliminary study conducted a curriculum analysis to know the requirement of developing interactive media. The result is there are still shortcomings using that media to support the students in the learning process. We have a conclusion that analysis of the interactive media development for integrated natural science by the motion themes in life using integrated connected type in the 21st century learning is so required to support the students to learn and to spur learners to have 21st century skills.
Meta-analysis of authentic assessment instrument development to measure learning outcomes of learners SMA/MA
Authors: Afriana Imelda , Festiyed
Published: May 2020

This Meta-analysis aims to summarize the research results related to the development of authentic assessment instruments in measuring the learning outcomes that have been done before. Based on the analysis from the background of several journals that have been selected, the biggest problem lies in the less active learning process from the communication to the assumption of the learners on the learning of physics that only study Count with definite results without knowing the usefulness of science in technology development. In addition, the teacher’s difficulties in creating, executing, and analyzing authentic assessments led to the teacher being more likely to assess cognitive aspect assessment and override other aspects of judgment. Based on the problem, one of them is to develop an authentic assessment instrument that able to measure learning outcomes according to the needs of learners. Summary of meta-analyses using a descriptive survey method. Based on the analysis done, the assessment aspect of attitudes and skills is more dominant than the cognitive assessment aspect. In addition, analysis results show that not all researchers have tested the level of reliability, effectiveness, practicality, assessment implementation, and student response. It depends on the development method used. Based on all the final results of the journal, the instrument is developed in criteria worthy of use in the school in measuring the outcome of SMA/MA physics.
Analysis of interactive media development of VIII grade integrated science with simple machine themes on human muscular and skeleton system using connected types integrated 21st century learning
Authors: Nurhafifah  , Ratnawulan
Published: May 2020

Along with the development of information and communication technology in the 21st century, it is expected that there will be a change in the way of delivery in the integrated science learning process. One of the characteristics of 21st century learning is the function of the teacher as a facilitator for students and the presence of multi-directional interactions using various contextual learning resources including the use of ICT. But often the teacher becomes the centre of the learning and there is no use of technology that allows multi-way interaction. The research that will be done supports 21st century learning, which focuses on the use of information technology by developing interactive media. The research method used is qualitative descriptive research method using a preliminary study in the form of material analysis to determine the need in developing interactive media. This research was done in class VIII Kampar 1 junior high school. The purpose of this study was to find out the analysis of student and analysis of the interactive media development grade VIII integrated science with simple machine themes on human muscular and skeleton system using connected types integrated 21st century learning. From the result of research on student analysis and learning media, it was concluded that students have a high interest in integrated science learning and the ability to use ICT is quite high. Development of learning media needs to be done so that the quality of content from the media can support the quality of learning so that integrated science learning goals can be achieved well.
Needs analysis in development of physics handout based on STEM approach for 11th grade of senior high school
Authors: Yulia Sri Rahma , Pratiwi Yulia , Ramli Ramli
Published: May 2020

Physics learning is part of natural science lessons to develop the ability to understand concepts, principles, and laws in solving problems related to natural events. STEM (science, technology, engineering, and mathematics) is a new approach in the development of the world of education that integrates more than one scientific discipline. Development of teaching materials physics handouts using the STEM approach developed are assumed by integrating the four components of Science, Technology, Engineering and Mathematics that are able to produce students’thinking activities that are useful to help raise students’ critical thinking characterized by problem solving, decision making, analyzing assumptions, evaluating, and conducting investigations to overcome the problems of learning Physics of students. This research is a descriptive study conducted through direct observation at Senior High School (SMAN 4 Padang). The research sample was students of 11th grade. The instruments used were questionnaires and interview sheets. Needs analysis of physics handouts based on the STEM approach includes analysis of students, analysis of teaching materials and analysis of learning activities. Based on data analysis of material teaching using the Likert scale, the results obtained 62.83%. Therefore need to be developed in the form of STEM-based physics handouts for 11th grade of senior high school
Analysis of learning media in the development of flood-themed teaching materials for high school students
Authors: Alkadri Robika , Fauzi Ahmad
Published: May 2020

Learning media is a very important learning component who use by teachers and students in the learning. 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 the 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. Analysis results from quality of content and purpose are in good criteria with a percentage value of 72, Quality of Learning are in good criteria with a percentage value of 76, technical quality are in good criteria with a percentage value of 78, and electronic-based learning media are in good criteria with a percentage value of 78. 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.
Analysis development of guided inquiry based physics e-module to improve critical thinking ability of students high school
Authors: Putri Sri Ramadela , Syafriani S
Published: May 2020

Industry 4.0 Revolution is an era in human life that is developing at this time, where in this era human life is oriented to technology. Mastery of technology today is a challenge for humans to make life easier. In this era also more human resources will be replaced by machines and technology. The industrial revolution 4.0 also influenced the education sector, for example in the development of teaching materials. Teaching material is one of the learning resources that can help students in the learning process so as to improve the competency of students. The teaching materials needed must lead to the development of technology that can facilitate students in learning. One example of teaching materials that are currently developing is the e-module. E-modules can help students understand physical concepts. It is hoped that with the help of physics guided E-module based on Guided Inquiry can improve the critical thinking skills of students in understanding physics. The ability to think critically is one of the characteristics of the 4.0 industrial revolution in education. The purpose of this study is to identify the critical thinking skills of high school students with the help of e-module based on Guided Inquiry. This type of research is quantitative descriptive with an instrument in the form of an observation questionnaire given to students and educators. Based on the results of observations given there are teaching materials that have not been oriented to the critical thinking skills of students. Therefore it is necessary to do an analysis in the development of physics guided e-module based on Guided Inquiry to improve the critical thinking skills of high school students.
Preliminary analysis learning media based on edupark science with scientific methods in the national geopark of Ranah Minang Silokek of Sijunjung
Authors: Ummah K , Rifai Hamdi
Published: May 2020

The curriculum 2013 sets learning using resources which to be orientated toward potentials and uniqueness in each region. Learning resources that discuss the potential and uniqueness of the area called the education park (edupark). One of edupark in Sijunjung Regency that can be integrated with learning is The National Geopark of Ranah Minang Silokek of Sijunjung area which is still used as an edupark. The use of geopark can be used as an edupark that is integrated with current technological advances. Based on the need for learning resources there, a preliminary analysis will be done to each science material at the school by using Plomp development research. The data of research uses interviews and questionnaires based on learning parameters, learning resources, students’ and environments’ characteristics then the description of potential attractions that support it among them are waves, light, and sound. Based on the results of preliminary research conducted, it was found that students were interested in learning involving the media.
Needs analysis in development of physics student books based on STEM approach for 11th grade senior high school
Authors: Pratiwi Yulia , Yulia Sri Rahma , Ramli Ramli
Published: May 2020

Physics learning is learning to emphasizes giving direct experience to students to foster the ability to think, work and be scientific, and communicate. In this case, physics learning by STEM approach can equip the skills needed by students. STEM (Science, Technology, Engineering and Mathematics) approach provides training for students to be able to integrate Science, Technology, Engineering and Mathematics in physics learning. In addition, the need for effective learning tools in helping students to build their knowledge independently. One effective learning tool is student books. However, there are still books on physics students who have not used the STEM approach. This study aims to analyze the needs of physics student books based on the STEM approach. This research is a descriptive study carried out through direct observation at senior high school (SMA N 4 Padang), with a sample of research is students of 11th grade. Needs analysis of physics student books includes analysis of students, analysis of teaching materials, and analysis of learning activities, with questionnaires and interview sheets. Based on descriptive data analysis of material teaching, the result obtained 73.8. Therefore need to be developed a physics book based on the STEM approach.
Preliminary study for development of teacher’s Books oriented research-based learning on science lesson in Junior High School
Authors: Fadilla Intan , Usmeldi
Published: May 2020

The teacher’s books that is used has not yet been based on an inspirational learning model so the learning process is not carried out contextually and scientifically. The impact on students competency was low. The solution to improve student competency was develop a research-based teacher book in science learning subject at Junior High School. To develop a research-based teacher book, a preliminary study was conducted. The researchs using descriptive methods. The researchs subject is the teacher on science lesson junior high school. The research respondents is science teacher on junior high school, Padang. The research instrument is observation sheets, questionnaires and interview guides. The data analysis technique used in this study is descriptive qualitative. The results showed that the analysis of the graduate competency standards was in the less category, the analysis of the learning prosess standard was in the less category, the analysis of learning assesment was in the less category, the analysis of learning difficulties was in the very less category, and the analysis model and learning approach was in the less category.
Preliminary study of development of students worksheet using creative problem based learning model in physics learning on senior high school
Authors: Prima Novelia , Usmeldi
Published: May 2020

The ability of students to think creatively in finding solutions to a problem is important in learning physics. However, teaching materials that used in school have not integrated learning model that can enhance students’ creative thinking abilities. The solution to improve students’ creative thinking skills is to develop worksheet using the Creative Problem-based Learning (CPBL) model in physics learning on Senior High School. To develop the worksheet, a preliminary study was conducted. This study used a descriptive method with the subjects of physics teacher in Senior High School at Padang. The instruments used are in the questionnaires and interview guidelines. Analyzing of the data is using descriptive analysis. The results showed that the performance analysis and the level of difficulty in learning were in the less category, and the student’s creative thinking abilities in physics learning were in the very less category
Preliminary analysis of development electronic module using inquiry based learning model for 21st century
Authors: Nisak Fitri , Yulkifli Yulkifli
Published: May 2020

The 21st century sign by the development of science and technology rapidly. In this century, all information can be accessed easily any time and anywhere. Physics learning in the 21st century should be able to take advantage fully of technology development. Unfortunately, the using of technology in physics learning activities was not going well. In fact, the printed teaching materials still used in learning. These teaching materials can only be used by students during Physics learning activities in the classroom. This cause the learning objectives have not reach fully. Module is one of teaching materials that can help student to study independently. Therefore it is necessary to develop module that is integrated with technology. The purpose of this study is to describe the physics learning condition include performance, graduation standard, learning difficulties and student characteristic. This research is descriptive qualitative research by processing data using descriptive statistic. The sample of this research were students and teachers form two senior high school in Padang. The data collected using questionnaires and interview sheet. The result of this research is development of electronic module using inquiry-based learning model for physic learning in 21st century needs to be done.
Preliminary analysis of interactive student worksheets development using the science process skill approaching the 21st century physics learning
Authors: Widestra Rahmi Agustia , Yulkifli Yulkifli , Samudra Elmi Yanto Adhar
Published: May 2020

Science learning in 21st century learning should be students-centered by emphasizing the direct experience of students be able to develop competencies and the ability to think. This requires students ability to be able apply the scientific method in finding knowledge based on the steps of science process skills. However, in reality students still haven’t been able to independently acquire knowledge by applying scientific methods, because learning process still not fully student-centered. Based on that problems, we need students worksheet that able to improve the attitude, knowledge and skills competencies of students. Student worksheets developed using approaches that could make students focus on developing their competence abilities. An introductory study was needed as a basis for designing the development of the students worksheet. The purpose of this study is to describe physics learning, teaching materials used in learning and the characteristics of students, which become preliminary studies to design the development of interactive student worksheets using the approach of science process skills. This research is a descriptive study, with sample are physics teachers and grade X students of two high schools in Padang. The instruments used consisted of student questionnaire, student needs analysis sheets and interview guide.
Preliminary analysis of physical module practicum modelling project based learning to improve scientific skills of high school students
Authors: Hamdani Yulia , Yohandri
Published: May 2020

The practicum module is a learning resource with complete and stand alone units arranged to help students achieve their learning go independently. 21st Century L changes changes the teacher centered learning approach to student centered learning approach. One of the learning models that are appropriate for this change is Project Based Learning. Through this learning model, students can develop their skills in critical thinking, creative, collaborate, and communicate design experiments to produce products in physics practice. Through physics practice should be able to develop scientific skills of students. The reality that is encountered, there is still a lack of physics practicum modules, so students are not able to independently carry out Physics Physics. This study aims to survey the analysis of the need for teaching materials in schools needed in physics practice. This type of research is quantitative descriptive. The data taken in this study were obtained from interviews with teachers and students with direct observation. The research instrument consists of a questionnaire and observation sheet. The results of this study prove that it is necessary to develop teaching materials in the form of practical textbooks based on project based learning models to improve students’ scientific skills.
The development of flip book contextual teaching and learning-based to enhance students’ physics problem solving skill
Authors: Maynastiti Dewi , Serevina Vina , Sugihartono Iwan
Published: May 2020

Apply CTL for learning media in the form of Flip Books. This research was conducted at SMAN 2 Bekasi from April to May 2019 as the field-testing phase which used Physics Flip Book media. The method of learning model ADDIE including the stages to develop this model. The Physics Flip Book display used the Kvisoft Flip Book Marker 3.6.1 software whose content is supported by several software, such as Camtasia 2018, Movie Maker and PDF. Results of validation test showed score 82.0% for material validation, 82.8% for media validation, and 81.20% for learning validation. The result of this research, 10 of 25 items were valid by using product moment validation test, 0.74 for the reliability test result by using Alpha Cronbach and 0.52 for the Flip Book effectiveness by using N-gain test. The results showed that using CTL-based Flip Books can improve physics problem solving skills in students.
The effect of using play-think-pair-share (PTPS) model to improve student learning outcomes in magnet topic for elementary school
Authors: Zakirman  , Lufri  , Khairani  , Rahayu Chichi
Published: May 2020

This research is motivated by the low student learning outcomes of science in magnet topic. To improve student learning outcomes on magnet topic, the application of a model that has accommodated the principles of learning at the elementary school level is needed. The model in question is PTPS. The purpose of this study was to see the effect of the PTPS learning model in improving students’ science learning outcomes on magnet topic. This type of research is quasi-experimental, with a sample of all class VI students enrolled in SDN 12 Nan Sabaris in the 2018/2019 school year. The sampling technique is purposive sampling, and data analysis techniques used a paired sample t-test. Based on the results of data analysis it can be concluded that there are significant differences in learning outcomes between before using the PTPS model and after the use of the PTPS model.
Validity and practicality level of structured inquiry-based reaction rate module containing macro, submicro and symbolic representation
Authors: Murni H.P , Azhar M , Ulianas A
Published: May 2020

Reaction rate is chemical concept that must be understood in senior high school (SMA). Learning difficulties data of reaction rate were obtained using interviews with teachers and students. Learning materials did not use comprehensively portray the interconnection of macro, submicro and symbolic representations. Therefore, students did not possess the competence to connect the three levels of representation which then influenced their learning outcomes and mental models. The aims of this Research and Development were to develop reaction rate module based on structured inquiry and find out its validity and practicality. The module was developed with Plomp instructional design model using interview, self-assessment, validity and practicality sheets as research instruments. Subjects of this research were 69 students and 2 teachers from several SMA in Padang. The module was validated by 6 validators and then was tested in two SMA. Validity and practicality were analyzed by using Cappa Cohen formula. The results showed that the module developed had very high degree of both validity (k=0.89) and practicality (k=0.85 for teacher response and k=0.89 for students response). So, conclusion this research is the developed module was valid and practical for use of reaction rate learning in SMA.
Preliminary analysis of learning resources for edupark in the matter rigid equilibrium by destination Rumah Gadang Istana Rajo Balun South Solok Indonesia
Authors: Sadraini  , Rifai Hamdi
Published: May 2020

Physics learning should integrate learning material with the environment so that physics learning becomes more interesting. Various kinds of learning resources that can be integrated into physics learning one of them are that the environment or educational park (Edupark). Edupark is an educational park to observe the application of physics concepts for students, for example, the destinationof Rumah Gadang. It is the most visited place by many people, including students. However, the visits are only for playing, traveling, and taking pictures. Therefore, Edupark of destination Rumah Gadang has not been used as a learning resource. Based on the needs of students using teaching resources. It was conducted a preliminary analysis of learning resource and Physics materials that is potential in Edupark tourism destinations in the Rumah Gadang. This study used the Plomp development model at the preliminary research stage. The purpose of this study was to observe the physics concept based on Edupark Rumah Gadang. The data in this study were obtained from questionnaires and interviews with educators and students at SMAN 5 South Solok. The technique of data analysis was descriptive percentages. The result of preliminary analysis, it was found that there was a physics concept and the need to develop learning resources in the form of the book of Edupark books in the matter “rigid equilibrium” based on the destination tourism Rumah Gadang on Physics lessons at high school.
Preliminary analysis learning media in the form of interactive multimedia based on edupark physics Carocok beach Painan Indonesia with the scientific method
Authors: Rahmadhani N , Rifai H
Published: May 2020

The country’s South Pesisir Districts is a million charms that have a variety of tourist destinations, which are very much visited by people from various regions in West Sumatra. Carocok Beach Painan is one of the tourist icons that has an extraordinary beautiful destination. It is unfortunate if many tourist attractions found in the concept of physics are only just visited and not used as a means of learning Physics. This research was an initial stage in the development model of Plomp. The purpose of this study was to use the physics concept based on Carocok Beach Painan. The data in this study were obtained from interviews and questionnaires, that were developed based on the parameters of the learning process, learning tools, characteristics of students and region. The trend of educators was used students worksheets as well as the high interest of students to use IT based learning in the school. It was necessary to develop instructional media, in the form of interactive multimedia using Scientific Methods that can be associated with Carocok Beach Painan Edupark, which have a variety of physics concepts especially in the material-wave.
Preliminary analysis learning media based on edupark physics with scientific methods on Padang beach
Authors: Elvisa G O , Rifai Hamdi
Published: May 2020

West Sumatera is one of the provinces surrounded by oceans that have long beaches that have physical concepts that can be directly observed. The beach is a tourist destination for domestic and foreign tourists who can be used as edupark in the process of learning physics. Edupark is an educational park that educators should be able to use as a learning resource for students. However, educators rarely use coastal tourism as a learning resource. The use of local tourist destinations can be used in learning Physics by implementing the development of science and technology that is developing now. According to the needs of students, so that information technology-based learning media can be used. The use of instructional media aims to help students understand the physical concepts found on the coast of Padang Indonesia, especially in light material and optical instruments. The data used in the study were obtained through interviews and questionnaires with educators and students. Based on this preliminary research conducted, it is known that students are interested in using learning media in the process of learning physics.
Developing Physics education sets for senior high school based on CPS models using PQ4R strategy for dynamic fluid
Authors: Wiharza Rio , Fauzi Ahmad
Published: May 2020

Education sets is once of education source that can help teacher and students in learning to increase their competence. It can do by using creative thinking skill and using education sets involve Syllabus, RPP, LKS, dan assessment tools based on Creative Problem Solving using PQ4R strategy. In learning, we can create character of students, especially save energy character. Respondent in this experiment are student class XI IPA 1 SMAN 1 Airpura. Instrument to collect data is questionnaire using Likert scale. Based on preliminary observation, attitude student analysis competence 89,07 (very good), knowledge 76,80 (very good), skill 73,67 (good). SKL analysis 76,66 % (very good), learning analysis 74,16 % (good), save energy analysis 48,30 % (not good). Depend on that case, we need to create education sets based Creative Problem Solving models using PQ4R strategy which can support in learning and good comprehension about saving energy.