bluuebunny/crossref_metadata_2025 huggingface dataset:
Microgravity method to monitor subsidence in Kota Lama area Semarang
Authors: Supriyadi  , Khumaedi  , Sugiyanto  , Heparona Jefta
Published: July 2020

The purpose of this study was to monitor the subsidence that occurred in the Kota Lama. The method used is the micro gravity method. Measurements were carried out 2 times in the period May and September 2017. The anomalous data obtained time lapse microgravity anomaly which were the weight difference between the period of September and May. This anomalous data still contains anomalous sources of groundwater leve changes which are then corrected with rainfall data for that time interval. Finally anomaly data were obtained which were the target of the study in the form of microgravity anomaly data due to subsidence. After being converted with a constant free air correction resulted in a maximum subsidence of 0.3 cm or 3 mm occurred in the north and south of the Kota Lama.
Non-destructive test of watermark materials quality for art pottery using x-ray digital radiography
Authors: Dewi N R , Listiaji P , Marwoto P , Iswari R S
Published: July 2020

In this study, the quality of watermark materials for art pottery were tested using x-ray digital radiography. The embedded watermarks in art pottery were chosen from 3 materials namely wood, and polylactic acid (PLA), and acrylic. Watermarked potteries quality testing were carried out during the making process, namely before and after being burned. Watermarked potteries were tested with 60 kV tube voltage regulation, 16 mA strong current, and 0.16 s exposure time. The radiographic image results obtained were then analyzed using ImageJ software. There are 3 stages of testing, namely visual analysis, image line profile analysis, and linear attenuation coefficients analysis. The results of visual analysis show that there were no crack in the watermarks so that planting the watermark did not damage the pottery. The graph of image line profile analysis results shows that the watermark made from wood was most clearly seen on the radiographic image. The attenuation coefficient value in the watermarked part does not change before and after the burning process while the attenuation coefficient value of the pottery had increased due to the shrinking process of the pottery. Wood has the largest attenuation coefficient value difference with pottery, so making it suitable as a watermark material for art pottery.
The effect of problem based learning supported by computer simulation student’s creative thinking skills
Authors: Simajuntak M P , Marpaung N , Barus P , Lestari R I , Nova B , Ompusunggu E
Published: July 2020

Generally, student’s have low score of creative thinking skills. The students who have a low creative thinking skills will be difficult, in solve the problem. Creative thinking skills will increase learning process. This research aims to determine the effect of PBL with computer simulation towards student’s creative thinking skills. The research method use a pretest-posttest design. The subject of this research are three classes, with experiment1 class simulation supported with computer simulations used PBL, PBL use the experiment2 class, and the contol class use conventional learning. The instrument use essay tests that measure creative thinking skills based on problem. The avarage of pretest and posttest in experiment1 class are 20.28 and 76.62 with N-gain of 71%, in experiment2 class 20,84 and 68,06 with N-gain of 60%, and in the control class 20,35 and 44,05 with N-gain of 30% and all of that classes in the medium category. Based on the results of testing that there is significant difference obtained on PBL applied supported with computer simulations towards student’s creative thinking skills.
Profile of senior high school students’ misconception in physics using need-based analysis
Authors: Trisniarti M D , Aminah N S , Sarwanto S
Published: July 2020

This study obtained the current situation of physics teaching, learning, and assessment at the senior high school in Surakarta, Indonesia based on various skills in 21st century. A need-based analysis was conducted to explore students’ current situation that lead to misconception in understanding concept of physics as learning objectives. Through random sampling, students’ questionnaires and teachers questionnaires to over 120 students and 12 teachers were held respectively. The implications showed that generic science skill and interpersonal skills had influenced students’ understanding of physics as the two affecting factors could be the reasons for misconception. From the questionnaires result, it showed that teachers and students of senior high school in Surakarta need a proper diagnostic test to investigate and map students’ misconception in physics classroom especially in difficult learning object such as kinetic gas theory. The four-tier diagnostic test with five possible answers was developed based on the result of need-based analysis and factors affecting students’ misconception which were students’ generic science and interpersonal skills.
Measurement of critical thinking in physics: the identification of students’ critical thinking skill through the work report on momentum conservation?
Authors: Saputri D I , Sunarno W , Supriyanto A
Published: July 2020

This study aims to measure students’ critical thinking skills through the ability to make practical work reports. The method used is qualitative descriptive method in the form of critical thinking skills through assessment of student work reports and questionnaire data. Rubric that used to measure students’ critical thinking skills with 10 indicators: clarity, accuracy, precision, consistency, relevance, strength, reason, depth, breadth and fairness. The study sample was 34 students. The results showed that students’ critical thinking skills through work reports were still 17.6% of students already had very high critical thinking skills, 58.82% had moderate critical thinking skills and as many as 23.53% students have weak critical thinking skills. Students have a high category in the breadth. Then clarity, accuracy, precision, consistency, and relevance have a moderate and evidence has a weak. The results of the student and teacher questionnaires about the application of practicum also stated that before practicum students were still sometimes given time to conduct preliminary studies.
Students’ responses on the development of flash learning media in light material
Authors: Ahied M , Wulandari A Y R , Munawaroh F , Rosidi I
Published: July 2020

This research aim was to know the student responses on the development of flash learning media in light material. The method of developing learning media used ADDIE which included 5 stages, namely Analysis, Design, Development, Implementation, and Evaluation. The instrument used to measure student responses to learning media used questionnaires. The sample used to retrieve student responses were 36 students. Analysis of student responses used descriptive statistics. Based on the results of data analysis, it can be seen that student interest in learning media was 85.94% with a very good category, students’ conceptual understanding was 80.82% with very good categories, and assessment of the appearance of learning media was 77, 22% with good categories. From these results, it can be concluded that the student responses to the media developed was very good with an average percentage of 81.33%.
How are student’s cognitive patterns viewed from higher-order thinking skills in kinematics?
Authors: Hasanah T A N , Handayanto S K , Zulaikah S , Yuenyong C
Published: July 2020

Higher-Order Thinking Skills (HOTS) is an ability that must be achieved by students today because this ability is the core of assessment in K13 and also as demand for 21st-century skills. Giving HOTS-based tests is an attempt to explore further the extent to which HOTS is mastered by students in kinematics and also describe cognitive patterns based on student’s HOTS. The method used in this study is descriptive, with an in-depth analysis of student answers. The research subjects were 51 students. The test instrument used consisted of five HOTS questions, which were divided into two analyzing questions, 1 evaluating question and 2 creating questions, has a reliability coefficient of 0.85 with considered high. The results of the study show that the cognitive patterns of students with high HOTS tend to be stable increasing following cognitive levels, for cognitive patterns of students with medium HOTS are having an up and down pattern, while the cognitive patterns of students with low HOTS tend to decline at higher cognitive levels. The whole HOTS in this study is relatively low because only 3.92% of students can reach high HOTS. Thus, it is necessary to apply of learning model such as Problem Based Learning to train students for higher order thinking in solving physics problems.
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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.
The development of android-based learning media on vibrations and waves topic for junior high school students
Authors: Mahfudz A Z , Billah A
Published: July 2020

Instilling abstract concept of vibrations and waves into students requires proper learning media and this research intended to develop such learning media. The Android-based learning media on Vibrations and Waves topic for VIII grade junior high school students have been successfully created through the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model. The interactive research product entitled “Vibrations and Waves” packed in Application Package File (.apk) is downloadable on Google Play Store. The application contains texts, figures, and animations that can be accessed on the Objective, Materials, Simulation, Exercise, and Evaluation menu. This product has been through a validation test and product trial. The validation was performed by materials expert, media expert, and teachers while the trial was done to VIII grade junior high school students. There were three students in the One-to-One Trial, twelve students in the Small-Scale Trial, and twenty-eight students in the Field Trial. The validity and practicality of the product were respectively 4.24 (excellent); and 4.43 (excellent). Also, the students stated that this learning media could be used as an independent learning source while the teachers convinced that this product is a supportive school learning source.
Developing instructional media of Labyrinth adventure to train problem solving and teamworking skills in inclusive school
Authors: Laksamana S I , Pamelasari S D , Wusqo I U
Published: July 2020

Problem solving skills are one of the skills that are expected to be possessed in each student through learning process. This ability will be difficult to train when the learning process is only memorizing the material or it is not based on existing phenomena. Solving a question or phenomenon can be done not only by individually, but also through groups. Solving problem in group is requiring interaction between group members, including general students and students with special needs. Instructional media of Labyrinth Adventure is one of the innovations that can be used to train problem solving skills and teamworking in inclusive schools. The purpose of this study was to find out the feasibility of instructional media of Labyrinth Adventure and the effectiveness of instructional media of Labyrinth Adventure to train problem solving and teamworking skills in inclusive school. The collecting data methods used in this study are method of questionnaire, Method of test, and method observation. The results obtained from the structural media feasibility test of Labyrinth Adventure are follows 93.75% in the media aspect, 98.44% in the subject aspect, 100% in the aspect of language, and 95.50% in the aspect of inclusion. The effectiveness of the instructional media of Labyrinth Adventure has an average N-gain score of 0.75 on training problem solving skills and 0.79 N-gain in team working skills.
Improving concept understanding and motivation of learners through Phet simulation word
Authors: Gani A , Syukri M , Khairunnisak K , Nazar M , Sari R P
Published: July 2020

This study was aimed at determining the improvement of concept understanding and motivation of learners through physics education technology (PhET) simulation. Quantitative approach and quasi experimental technic were employed in this research. The populations in the study were four classes of 8th grade students of MTs Insan Qur’ani, while two samples were class VIIIc and class VIIId. The sample was determined by simple random sampling technic where VIIIc was treated as experimental group and taught using PhET while class VIIId was simulated as control group and was taught using a simple lecture method. 15 valid and reliable multiple choice questions were used as instrument to evaluate the concept understanding and motivation. While leaners motivation was measured using 7 questions and was quantitatively analyzed. The test results of concept understanding undergo normality test, homogeneity test and hypothesis evaluation. The data show that the average result for the class of experiment was found to be 9,75% while for the control class was found to be 8,81%. Motivation questionnaire analysis results showed the significant increase in each item of statement, for the experimental class was found to be 85.6 while control class was 64.6, the score indicated that the students in the experimental class were more motivated in learning physics compared to the students of the control class. Based on the research findings, we conclude that PhET implementation in the classroom would enhance both concept understanding and motivations of students
The Effect of science learning bases-STEM assisted by augmented reality toward scientific attitudes and science outcomes
Authors: Wahyu Y , Sadia I W , Suarni N K , Suastra I W
Published: July 2020

STEM-based science learning assisted by augmented reality can answer 21st-century education challenges by characterizing the interdisciplinary approach of the four fields of study. 21st-century learning requires students to be literate in science, technology literacy, creativity, and have a good scientific attitude. STEM-based science learning aided by augmented reality is a learning approach that can develop scientific attitudes and improve the learning outcomes of the basic concept science of students. This research was conducted to find out the effectiveness of the application of STEM-based science learning models assisted by augmented reality on scientific attitudes and science of PGSD students’ learning outcomes of STKIP Santo Paulus Ruteng. The research design used was quasi-experimental in the form of a non-equivalent pre-post control group design. Based on the results of the effectiveness test, it is known that the experimental class n-gain value is greater than the control class. It can be concluded that STEM-based science learning can develop scientific attitudes and improve students’ science learning outcomes.
The effectiveness of science experiment through multimedia teaching materials to improve students’ critical thinking
Authors: Yakob M , Saiman  , Sofiyan  , Sari R P , El Islami R A Z
Published: July 2020

The aims of this study is to explore the effects of three different forms multimedia teaching to critical thinking skills of students in the context of the science laboratory. The three forms of multimedia teaching materials are static images, videos, and animations, that used to teach science trial for 120 students from Elementary School teacher education university of Samudra, Langsa. The method used in this study is a quasi-experiment with pretest to posttest control group design. The pretest method was given to college students to determine their learning achievement before given the application multimedia to experiment science during learning process for the experimental group and also the implementation multimedia and learning feedback from a list of several questions. Descriptive statistics and ANOVA were also given to analyze data that have been collected. This study shows that videos and animations have bigger effects in critical thinking skills in the context of science laboratories rather than static images and observation performance. In addition, animation video in presentation can help students to understand the experiment and learning science easily.
Establishing an android-based physics glossary for junior high school students
Authors: Hardiyanto I , Pangestuti J R , Billah A
Published: July 2020

Understanding Physics term accurately is exceedingly essential in supporting the achievement of Physics learning objectives. Android-based software has many advantages starting from a large number of users, practicality, to the ease in the spread of the application as a means of pinning learning media. The purpose of this study was to develop an Android-based physics glossary. The research steps referred to the Four-D (Define, Design, Develop and Disseminate). The finished product has been declared valid and practical by material experts, media experts, and teachers. The product’s validity value was 4.25 and categorised as “excellent” while the practicality score was 4.53 and categorised as “excellent”. The product testing was carried out through three stages, namely One-to-One Trial involving 3 students, Small-Scale Trial including 12 students, and Field Trial involving 28 students. The developed product, “Physics Glossary”, is in an Application Package File (.apk) format and has been published so that it can be downloaded for free through the Google Play Store. The glossary was designed interactively, making it easier for users to search for physical terms and explanations. Another plus is that the application includes explanations in two languages, Indonesian and English.
7th grade student’s creativity analysis on science learning
Authors: Rosyida U N , Sukarmin  , Sunarno W
Published: July 2020

Creativity is one of some competencies needed in the 21st Century, therefore creativity is something that people should have to face challenges in the 21st Century. The aim of this research was to 1) find the creativity’s level which measured based on aspects Fluency, Flexibility, Elaboration, Originality, and Problem Solving; 2) find the percentage of each creativity’s indicators. This research was held in SMP Negeri 1 Kawedanan Magetan on second semester 2017/2018. This research’s subject were 55 7th grade students, determined with the random sampling technique. This research was descriptive quantitative research. Data were collected using observation technique. Analysis technique of observation sheet with quantitative analysis. The outcomes showed that: 1) student’s creativity in the high level was 31, in the medium level were 17, in the low level were 7; 2) the percentage of each creativity’s indicators in Fluency 74.55%, Flexibility 78.64%, Elaboration 77.42%, Originality 87.73%, and Problem Solving 88.41%. The conclusion was the level of student’s creativity on Science learning was at high level seen on each aspect which gets the result over 50%. Creativity analysis in this research can be used as a reference for further research about measuring deeper creativity.
The development of android-based science learning media on human eyes topic
Authors: Sajidan  , Billah A , Masykuri M , Sarwanto
Published: July 2020

Either field or literature studies recommended the need of learning media on human eyes topic which present learning objectives, materials, evaluations, and assessments. Also, the learning media should be able to support independent, interactive, and fun learnings. Learning media is developed through the steps of research and development. The developed product was an android application named “Human Eye Optics.” The product characteristics were: providing menus: learning objectives, materials, simulations, exercises, and evaluations; each menu has sub-menus such as eye parts, viewing process, and eye disorders; having five interactive and communicative simulation submenus; materials are described attractively through the use of full-color text and images; the teacher can use it as a learning device since it has covered learning objectives, materials, quizzes, exercises, and evaluations with assessment; the application could be referred to as an independent and repeatable learning source; and usable at anywhere and anytime. The product feasibility was categorized as “excellent” with a score of 4,60. The same thing went with the practicality which belonged to the “excellent” category with a score of 4,51. The effectivity achieved “high” with an n-gain of 0,76 while the average student activity was 89,02% and declared to be “very good.”.
Development of lesson plan device based on inquiry based learning to improve learning outcome and critical thinking skill
Authors: Zaini M , Ita  , Zannah F
Published: July 2020

This research is a development research that aims to evaluate the validity, practicality, and effectivity of lesson plan device based on inquiry based learning which has been developed on interaction of living things and its environment topic in junior high school. This research adapts Tessier’s model to developed the lesson plan device include syllabi, lesson plan, worksheet, learning material, and media. The instruments used in this research were validation sheet, response questionnaire, learning outcome test, and critical thinking skills observation sheet. The results showed that:1) the validity of lesson plan device based on expert assessment was in a valid category, b) the practically of the lesson plan device categorized as very good and c) the effectiveness based on learning outcome and critical thinking skills. The subjects for the field test were 29 grade VII students at Public Junior High School 13 Banjarmasin, South Kalimantan. The learning outcome result showed that has exceeded the passing grade and the critical thinking skill was in a very good category. This result concluded that the lesson plan device based on inquiry based learning developed have been proved worthy for biology learning, especially on on interaction of living things and its environment topic.
Utilization of multiple representations in science learning
Authors: Syahmel  , Jumadi
Published: July 2020

This study aims to develop a science teaching model by utilizing multiple representations in each syntax to be implemented by science teachers in order to improve understanding of science concepts, science process skills, and critical thinking skills of students. This study is a research and development (R & D), adapting R & D model of Borg and Gall which consists of 10 developing stages, specifically: 1) research and information collection; 2) planning; 3) develop preliminary form of product; 4) preliminary field testing; 5) main product revision; 6) main field testing; 7) operational product revision; 8) operational field testing; 9) final product revision; 10) dissemination and implementation. This research was carried out until the main product revision stage (5th stage). Revisions were conducted after the experts’ judgments obtained. The result of this study is the framework of Discovery Learning using Multiple Representations (DLMRs). Based on experts judgments, this model is suitable to be implemented in science learning to improve science process skills, critical thinking skills, and students’ curiosity.
Identification of the indigenous science concepts in the batik-manufacturing process to develop STEM integrated ethnoscience learning
Authors: Izzah S N , Sudarmin S , Wiyanto  , Prasetyo A P B
Published: July 2020

The aim of the study was to identify the scientific concept in the batik manufacturing processes as learning resources for developing science teaching learning grounded in STEM-approaches and ethnoscience. The research method was one of qualitative ethnographic studies. Data were collected by observation, interviews, and documentation studies at Pekalongan Municipality and Regency. The results showed that in the process of batik-manufacturing by indigenous people in Pekalongan, the concept of science was successfully identified and related to science teaching learning for junior high schools. Furthermore, these scientific concepts were integrated into science learning using the Science, Technology, Engineering and Mathematics (STEM) approach.