bluuebunny/crossref_metadata_2025_split huggingface dataset:
Gamified experimental data on physics experiment to measuring the acceleration due to gravity
Authors: Saprudin S , Liliasari S , Prihatmanto A S , Setiawan A , Viridi S , Safitri H , Yulina I K , Rochman C 
Published: July 2020

Abstract
This research is a first step in the model design of gamification in physics experiment that engage pre‐service physics teachers (PPTs) to an experiment system designed like gameplay. The implementation of gamification in physics experiment to measuring acceleration due to gravity (g) using the application of physical phone experiments (phyphox) on smartphone. It was involved 25 PPTs at one of the University in Bandung. This quasi-experimental research used one-group-pretest-posttest design. Data were collected through tests. The result of data analysis shows that there were significant differences in the PPTs’ concept mastery before and after following the physics experiment with implementing gamification. The increasing of PPTs’ concept mastery can be categorized as medium (〈g〉 = 0,30 and d = 0,32). The model of gamification in physics experiment that was designed create the atmosphere of physics experiment more fun and competitive, promoting motivation to engage in physics experiment activities such as observing, collecting data, analyzing data, inferring and communicating. Further development, this model of gamification needs to be supported by a system that can integrate the assessment automatically. It will be facilitate lecturers in conducting product and process assessments.
Analysis of science process skill in high school students
Authors: Atush Sholihah N A , Sarwanto  , Aminah N S 
Published: July 2020

Abstract
Science Process Skills (SPS) are all scientific skills used to acquire, develop, and apply scientific concepts and theories. Mastery of Science Process Skills is not only useful in science learning but also for the daily life of students. This study aims to obtain a profile analysis of students’ science process skills. The research method used is a survey method with research subjects, namely at 4 Madiun state Senior High School. Data collection technique used is the test technique. The data obtained were then analyzed by simple statistical analysis. Based on the results of the research that has been done, it can be seen that the ability of Science Process Skills in 4 Madiun state Senior High School students as a for each aspect of Science Process Skills is still low with a percentage of 47%.
Students’ scientific reasoning skills in a fluid and its correlation with project activity
Authors: Putri N D , Handayanto S K , Hidayat A , Saniso E 
Published: July 2020

Abstract
Scientific reasoning skills are necessary to be achieved high school students to encounter competition in the 21st century. This study aims to explore the students’ scientific reasoning skills in a fluid and its relation to project activities. This research is a qualitative study with a case study design that focuses on students’ scientific reasoning skills on fluid. The subjects in this study were high school class XI students who attended project activities. Data were collected by analyzing the results of students’ written tests, observations, and interviews. The results of the study show the relationship between students’ scientific reasoning skills and project activities in a fluid. These show common mistakes made by students in scientific reasoning, such as testing all variables (including variables that not related to the questions), testing incorrect variables, focusing on one variable, and depending on prior knowledge, could not determine the relationship between dependent and independent variable. Scientific reasoning skills are essential to be trained in learning through project activities. This study recommends teachers to apply project-based learning to explore students’ scientific reasoning skills in large and heterogeneous groups.
Analysis of critical thinking skill profile on the concept of simple harmonic motion using two tier instrument test
Authors: Umam A , Suparmi  , Sukarmin  
Published: July 2020

Abstract
The purpose of thisstudy was to analyze critical thinking skills profile of seniorhigh school learners, especially in eleventh grade. This study used qualitative descriptive study to analyse critical thinking skills profile. The subject of this study were eleventh grade student of sience classes in Public Senior Hight School no 4 Surakarta with 87 students whose registered as student in the 2018/2019 school year. Sampling in this study used random sampling technique. The instrument test used in this study was two tier test. The instrumentuse indicatorscritical thinking skills developed by Ennis with 5 indicators and 7 sub-indicator. Instrument test consists two stages, the first stage was multiple-choice questions and the second stage was an open-ended free response question which was the reason forthe answer of the student to the question at the first stage. The result of this study showed that critical thinking skill were still low. In every indicator critical thingking skill were 42% for basic clarification, 29% basic for decision or basic support, 27% for inference, 25% advanced clarification, 24% stategy and tactic. Critical thinking skills were low because learning was still centered on the teacher.
Analysis of students’ difficulties about work and energy
Authors: Rivaldo L , Taqwa M R A , Zainuddin A , Faizah R 
Published: July 2020

Abstract
Identification of students’ difficulties is an important part of designing a quality learning. This research used survey method that aims to identify the difficulties experienced by students in understanding the concept of work and energy. The research subjects consisted of 142 undergraduate students in physics education (46 first-year students, 39 second-year students, and 57 third-year students). Data collection was carried out from 2018-2019. There are 10 multiple choices questions that are used to uncover the difficulties experienced by students. Based on the results obtained it can be concluded that many students still have difficulty in understanding the concepts of work and energy. The percentage of students who answered correctly are 20.42% in concept of work as a result of dot product multiplication; 11.26% in the work-energy theorem; 38.03% in the concept of spring potential energy, and 22.54% in the conservation law of mechanical energy.
Effectiveness of animation using pictorial riddle approach toward physics concept understanding at senior high school
Authors: Lukma H N , Setyawan D , Chosinawarotin  
Published: July 2020

Abstract
The purpose of this study is to determine the effectiveness of animation using pictorial riddle approach toward physics concept understanding at Abul Faidl Senior High School, Wonodadi Blitar. The study applied experimental research with pretest-postest control group design. The result of the study indicate that the average pretest score for the experimental class is 67,4 while the posttest score is 83,04. The average score for the control class, for the pretest is 65,4 while for the posttest 72,38. The t-independenr test result show that the value of sig (2-tailed) 0,000 < α (0,05), then Ho is rejected and H1 is accpeted. Thus it can be concluded that there is a significant effect of the application of animation using Pictorial Riddle approach toward physics concept understanding in 2018/2019 Academic Year at Abul Faidl Senior High School, Wonodadi Blitar
Multi representation approach to increase the students’ conceptual understanding of work and energy
Authors: Taqwa M R A , Zainuddin A , Riantoni C 
Published: July 2020

Abstract
This paper aims to reveal the effectiveness of a multi-representation approach in work and energy learning in improving students’ conceptual understanding. This research is an experimental study with the design of one group prestest-posttest design. The research subjects were 42 undergraduate students of Physics Education in the subject matter “physics material and learning I”. The test instrument consists of 15 reasoned multiple choices questions. Based on the results of data analysis using paired sample t-test obtained t = -9.39 (p = 0.00) so it can be concluded that the multi-representation approach in work and energy can significantly improve student understanding of concepts with N-gain of 0.41 and d-effect size of 1.76. Before learning with a multi-representation approach, many students had difficulties to interpret the diagram of kinetic-potential energy. But it have minimalized after instruction. Learning with a multi-representation approach is effective to increase the students conceptual understanding of work and energy because it helps students understand the concept of physics as a whole.
The Influence of outdoor learning models on critical thinking ability
Authors: Rohman A A N , Jumadi  , Wilujeng I , Kuswanto H 
Published: July 2020

Abstract
This study aims to: (1) Knowing model of outdoor learning subject specific pedagogy that is feasible to use (2) Knowing the effect of outdoor learning model on critical thinking ability of Students. This study used quasi-experimental. Subjects in this study were X MIA 4 and X MIA 5 Sleman 1 State Senior High School registered as students in the 2017/2018 school year. Sampling in this study used purposive sampling technique based on certain criteria. Class X MIA 5 was an experimental class using experiment-based outdoor learning models while class X MIA 4 was a control class taught using conventional models. Data collection techniques used questions related to critical thinking skills. The instrument used was test of critical thinking skill which 5 indicators and 8 sub indicator. Learning tools developed were lesson plans, student worksheet, and critical thinking assessment instruments. Before being applied, learning tools were validated by experts to measure their feasibility. Measurement of whether or not there is influence of the model application on critical thinking skills is used t-test. The results of this study (1) the quality of learning devices of outdoor learning model according to expert material assessment were very good categories, (2) outdoor learning models effectively applied to upgrade critical thinking ability.
Development of electronic modules by scientific approach to train science process skills
Authors: Simamora R , Sunaryo  , Susila A B 
Published: July 2020

Abstract
The aims research is to design and implement the development of E-modules based on scientific approach and to analyse the effectiveness and feasibility using e-modules to train science process skills in SMAN 65 Kebun Jeruk West Jakarta of XI Mathematics and Natural Science grade. Research models used in this study is research and development of Borg and Gall models with stages: planning, initial product development, initial testing, major product revisions, large group trials, product operational revisions, operational trials, final product revisions, dissemination and distribution. The instruments are field test questionnaire filled out by students, teachers, and experts. The research results get a good percentage interpretation based on the effectiveness and test feasibility where is feasible category that can be concluded that the e-modules by scientific approach is effective and very feasible to train the science process skills.
The use of quartet card game on hydrocarbon to improve learning outcomes ten-grade students
Authors: Lestari O , Priscylio G , Copriady J , Holiwarni B 
Published: July 2020

Abstract
This study has the results of applying for a quartet media game card in student learning outcomes about Hydrocarbons in the Class X MA Darel Pekanbaru. The teacher must understand the types of media available at the school because learning with media can make it easier for students to understand subjects that are often difficult to manifest in traditional learning. One of the media created for hydrocarbon lesson material is quartet card game media because hydrocarbons are one of the chemical learning materials. Chemistry is the science of nature and the nature of things that shape our environment and various changes. With the media quartet card game can help students’ motivation in learning so that it can improve student learning outcomes. This type of research is an experimental study with a randomized pretest-posttest control group design. The population of this study is all classes of Pekanbaru Darel X Learning which consist of 7 classes. The sample in this study was obtained after the normality and homogeneity tests, were classes X5 and X7. The experimental class was applied with quartet classes and traditional learning media and control card games. Data were analyzed using a significance level (α = 0.05) and dk = 44, based on data analysis and processing, obtained tcount> t table ie 2.82> 1.68, this means that media applications can improve student learning outcomes quartet learning card game results with the subject of Hydrocarbon in class X Darel Hikmah Pekanbaru. The influence of the media quartet applies card games for learning outcomes on hydrocarbons in class X MA Darel Hikmah Pekanbaru 15.3%. This study also shows that the use of quartet game cards can improve student learning outcomes.
Synthesis zeolite y from kaolin bangka belitung: activation of metakaolin with various concentration of sulfuric acid
Authors: Safitri L E , Zuryati U K , Rohma H N , Ni’mah Y L , Prasetyoko D 
Published: July 2020

Abstract
Zeolite Y has been synthesized from Kaolin Bangka Belitung as precursor through activation of metakaolin with acid. The synthesis of zeolite Y consist of metakaolinitation, activation metakaolin with sulfuric acid using various concentrations (3, 6, 9, 12, and 15 M), aging, hydrothermal process for 24 hours at 100 °C. The solid products were characterized with X-ray Diffraction (XRD), Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX). The result of XRD and FTIR indicated that zeolite Y formed at the variations 3, 6, 9, 12, and 15M. Based on XRD pattern of the results, phase of zeolite P formed at the variation 3M. The surface morphology and ratio of Si/Al of Zeolite Y was analyzed using SEM-EDX. The SEM micrograph of zeolite Y and P with variation of sulfuric acid 3, 6, 9, 12, and 15M like octahedral and sphere form and the ratio of Si/Al of the products based on EDX are 1.7; 1.6; 1.58; 1.64; and 1.59 respectively.
Optimization of NaCl concentration and electrocoagulation processing time to reduce the level of chromium heavy metal solutions
Authors: Mardiyono  , Sajidan  , Masykuri M , Setyono P 
Published: July 2020

Abstract
The process of reduction of Cr from the wastewater of the metal coating industry can be carried out by electrocoagulation process. The purpose of this research was to reduce the levels of Cr in solutions, containing Cr as a preliminary study for the determination of NaCl levels added as electrolyte media and the determination of optimal electrocoagulation processing time. This research was laboratory experiments with a continuous electrocoagulation process using iron electrodes, with variations in addition of NaCl and processing time. Determination of Cr in solutions was carried out before and after electrocoagulation using an Atomic Absorption Spectrophotometer (AAS). Two-way ANOVA was used to analyze the result and showed that the significance value of the variation of NaCl concentration and processing time are decrease concentration of heavy metal Cr in solutions was 0.001 (p <0.05). These results indicate that there is a significant difference in the concentration of Cr which is significant in terms of variations in NaCl concentration and variations in electrocoagulation processing time. Based on these results, it can be concluded that the continuous system electrocoagulation process with the addition of 1.20 % w/v a time of 60 minutes gave the most optimum reduction of Cr.
Prospective chemistry teachers’ perceptions of multiple representation and ability to represent voltaic cell subject
Authors: Nurdiyanti D , Permanasari A , Mulyani S , Hernani  
Published: July 2020

Abstract
The aim of this research was to obtain information about students’ perceptions concerning the importance of multiple representations including macroscopic, sub microscopic and symbolic level in chemistry teaching materials, the difficulties in learning voltaic cell, and the ability to present voltaic cell material through those three level of representations. Participants of this study was twenty one students of chemistry education program at the fifth semester, who are taking the subject of school chemistry in the one of the university in Indonesia. The instruments used ware qquestionnaires and interview. They are utilized to gather the students’ perceptions about the characteristics of voltaic cell material, the students’ knowledge of multiple representations and those representations in chemistry teaching materials, and the rubric assessments of teaching materials based on those representations. This study indicates that the students consider the voltaic cell subject as difficult material. Even though they do not understand the multiple representations, they encourage to involve those representations in the teaching materials. Furthermore, the students’ ability of presenting the multiple representations are considered in the low category. They are not be able to apply those representations and associate one and another.
Profile of student’s conception in implementation of predict-observe-explain (POE) strategy on thermochemistry concept
Authors: Zakiyah I , Widodo W , Tukiran  
Published: July 2020

Abstract
Every student has different understanding of a concept. To achieve expected cognitive abilities, so it needs a good understanding of concept. Based on preliminary research understanding of thermochemistry concept is low. This low ability caused of majority of student still have misconception. This misconception should be removed, one of the way to remove is using predict-observe-explain (POE) strategy. The aim of this research is to find out profile of student conception after implementation of POE strategy. The subject was 36 student of science class at 11th grade of SMA Kemala Bhayangkari 3 Porong. This research was using three tier diagnostic test to know student’s conception. Generally the result was student’s conception changed. It indicated with the result of pre-test, initially 72.80% student have misconception, 15.14% didn’t know the concept and 12.78% knew the concept, while the result of post-test changed become 92.78% knew the concept, 3.06% didn’t know the concept and left 4.17% with misconception. So it can be concluded that student’s conception profile after implementation POE strategy generally changes become knew the concept and student conception who didn’t know the concept and misconceptions showed low percentage.
Understanding of chemical content in high school: difficulties from the teacher’s perspective
Authors: Sumarni W 
Published: July 2020

Abstract
This research is trying to uncover the difficulties encountered by high school chemistry teachers in teaching chemical content. A total of 30 chemistry teachers who were attending a regional teacher professional development program at the Institutes of Educational Development in Central Java were included in this study. The methods of collecting data by using questionnaires and interviews to respondents. The results showed that the difficulty of teaching chemical content experienced by 30 chemistry teachers from all over Indonesia was mainly due to the lack of knowledge of chemistry mastered both in the macroscopic, microscopic and symbolic aspects, the many concepts that must be mastered that were not interconnected, the low mathematical abilities of the teachers. The difficulties experienced by teachers are exacerbated by the difficulty of teachers to access various information and opportunities to participate in continuous professional development activities.
Developing an android-based learning media on human auditory system for junior high school students
Authors: Billah A , Yazid M A 
Published: July 2020

Abstract
The purpose of this research was to produce an Android-based learning media on Human Auditory System for VIII graders of Junior High School. The product is packed in the Application Package File (.apk) format and was triumphantly developed using the Research and Development model consisting of several stages: Analysis, Design, Development, Implementation, and Evaluation. The application contains Objectives, Materials, Simulation, and Interactive Evaluation. The product entitled “Human Auditory System” could be accessed on the Google Play Store. The application was assessed by materials experts, media experts, and teachers. Moreover, the product has gone through three stages of evaluation in VIII Grade of Junior High School students involving six students in One-to-One Trial, 12 students in Small-Scale Trial, and 30 students in Field Trial. The results showed that this product was conveniently used as the learning media for Human Auditory Systems in VIII Grade of Junior High School with a validity value of 4.22 (excellent), and a practicality score of 4.31 (excellent).
Validity and reliability CBSL model to improve critical thinking skills and student’s responsibility
Authors: Isnawati  , Ibrahim Muslimin , Tjandrakirana  , Rusmansyah  
Published: July 2020

Abstract
Collaborative based Science Learning (CBSL) Model was a model that can be used in science learning to improve critical thinking skills and responsibility of junior high school students. The syntax of the CBSL model includes: 1) Motivation and problem orientation, 2) Collaborative-based critical thinking activities, 3) Communicating the results of collaborative critical thinking activities, 4) Advanced practice of critical thinking and responsibility, and 5) Reflection. This study aims to describe the validity and reliability of the CBSL model that has been developed. The validity and reliability data of the CBSL model is obtained through Focus Group Discussion (FGD) activities. The results showed that the CBSL model met the requirements of validity (rα = 0.860) and reliability (α = 0.980), so that the CBSL model met the validity and reliability requirements. The implication of this research is that a valid and reliable CBSL model can be used to improve students critical thinking skills and student responsibility theoretically.
Activation of carbon at different concentration microsphere adsorbent and its application for ibuprofen adsorption
Authors: Ulfa M , Fadhila Y L E , Prasetyoko D 
Published: July 2020

Abstract
A synthesis is presented in this research, microspheres carbon by mixing Pluronic F127 triblock copolymer, which was used as a main pore size direction, gelatine as a codirecting agent, Sucrose becomes the main ingredient of carbon precursor and H2SO4 be a catalyst. The mixture solution carried out at hydrothermal reactor followed by evaporation, partial carbonization, and pyrolysis under nitrogen flow. After being microspheres carbon have activated by KOH solution at room temperature for 24 h using a variation of the KOH concentration at 5, 10, 15 and 20 (%w/v), respectively. Activated Microspheres carbon have characterized by SEM and FTIR. In this study, it was found that carbon mass after activation is increased due to the deposition of potassium and a free water molecule. The morphology of microspheres carbon after activation process observed as soccer balls-like with pore size 0.5-15 µm with numerous of carbonyl and hydroxyl group. In this study, it was found that the greater the activator concentration, the greater the adsorption capacity, due to potassium deposition and water molecules. Maximum adsorb capacity is at 20% KOH concentration at 35 minutes. Microspheres for drug delivery systems are interesting to study.