bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of biomass briquettes based on carbonized rice husk and jatropha seed waste by using newspaper waste pulp as an adhesive material
Authors: Suryaningsih S , Resitasari R , Nurhilal O 
Published: November 2019

Abstract
Biomass waste that has not been utilized properly is rice husk and jatropha seed waste, and there is a future need for efficient utilization of these wastes. Rice husk is the outermost part of the rice seed, the rice milling process produced 20% - 30% of the waste as rice husks. Jatropha shell waste is a de-oiled part of jatropha seed after the oil extraction process for biodiesel production, and produced 70% of waste. As biomass, both materials are potential sources of carbon that can be utilized as an alternative energy sources such as bio-briquettes. The method used in this research is experimental method including drying of the biomass material sample, carbonization process, refine and filtration using 40 mesh sieve (420 μm). The composition of the selected charcoal mixture is 80:20 and 50:50, and the addition of the newspaper waste pulp as an adhesive material with variations of 8% and 12% by weight. Characterization is done by using the mass density test, proximate test and calorific value test. After going through pressure printing and drying process, the briquettes with 8% addition of newspaper waste pulp adhesives has the highest heat energy content, equal to 5,650 cal/g.
Student conception about the quality of packaged water
Authors: Nuryani H S , Rustaman N Y , Rochintaniawati D 
Published: November 2019

Abstract
Instead of a pure state, water on earth contains a variety of material, either dissolved or suspended, including microbes. Therefore, before being consumed, water should be processed first to reduce levels of contaminants to a save level. Standard of water quality for household need (Permen No.492/MENKES/PER/IV/2010) is usually used as a reference for drinking water requirement. This preliminary study was carried out to investigate students’ conception of packaged/bottled water quality assurance produced by certain vocational schools as products of their students. The explanatory survey method was used in this study to detect their conception deeply. The respondents or participants of this study was ten graders from a public vocational school in Subang and their teachers in Agribusiness course. Data were collected through observation, interview, and test for their preconception. Research results show that students’ knowledge about mineral water is not in line with their understanding of the water quality, and their teacher’s as well.
Analysis of student difficulties based on respondents ability test on the topic of geometry molecules
Authors: Nugraha M , Supriatna A , Fatimah S S 
Published: November 2019

Abstract
In this research, the comprehension levels and students difficulties on the subject of molecular geometry were determined via respondents ability test. This test consist of five items designed specifically to detect what the students think. One problem has several options, each of which has an indicator of learning difficulty so that when the student selects one of these options, the researcher can immediately detect the difficulties that the student has. The students answer comes with a reason to avoid guess answers. The test was applied on 52 students of grade X. Analysis of test results using descriptive qualitative analysis. According to the findings obtained from the test, the students had numerous difficulties. It was found there are 7 kinds difficulties in geometry molecules material. The top three difficulties experienced by students are (1) 71% of students do not understand the meaning of the symbol of lewis where students describe in the form of covalent bonds; (2) 65% of students do not understand the influence of free electron pairs at geometry molecules; 31% of students do not understand the various types of geometry molecules when given the problem of placing between the name and geometry of the molecules. These results shown that students still do not understand the basic concept of geometry molecules, so that it is required further investigation to find out how to overcome student learning difficulties on the topic of geometry molecules.
First-year university students’ understanding of chemical equilibrium
Authors: Aini F Q , Fitriza Z , Gazali F , Mawardi  
Published: November 2019

Abstract
This study analyzed the understanding of first-year students on the concept of chemical equilibrium. It involved 30 first-year students in the faculty of mathematics and natural sciences of Universitas Negeri Padang. The students’ understanding was explored using a conceptual test. The result shows that generally, students have misconceptions about the concept of chemical equilibrium especially when the reaction reaches equilibrium as reported by many studies. The results of this study have implications for the lecturers in planning the general chemistry learning process, especially on the chemical equilibrium topic.
Development of Three Tier Multiple Choice Diagnostic Test to Assess Students’ Misconception of Chemical Equilibrium
Authors: Siswaningsih W , Nahadi  , Widasmara R 
Published: November 2019

Abstract
The aim of study was to develop the three-tier multiple choice diagnostic test that was conform with criteria of content validity and reliability to identification students’ misconception about chemical equilibrium. The method of this study was development and validation methods. Fourteen items were developed in this study. Based on the value of content validity ratio (CVR), all items were valid. The value of reliability of items were developed is 0.759, it means that items were acceptable. The respondents of this study were 5 validators who are lecturers from Department of Chemistry Education and 35 senior high school students’ who was learned subject chemical equilibrium. Based on analysis of students’ answer were based on a determination key could be found students’ misconceptions that on dynamic equilibrium, concentration of reactant and product are same as common misconception in the student (57.1%).
Learning how computer’s work with combining CS-Unplugged and Raspberry Pi
Authors: Soviani S , Kusnendar J , Prabawa H W 
Published: November 2019

Abstract
Almost from the beginning, computer science was hampered by the perception that computer science exclusively focused on programming. This results in computational-related learning being very limited and minimally taught to students. The widespread use of ICT tools in indirect learning has changed the way students interact with content. This paper presents a different approach, while keeping the teacher at the centre of control of classroom activities but students are given the opportunity to explore the content to be learned by CS-Unplugged and Raspberry Pi. This activity aims to provide basic knowledge about how computers work. One of the activities is a simulation and experimentation on how computers work through the CS Unplugged approach. The basic knowledge formed from the simulation was then used as the basis for assembling a simple computer using Raspberry Pi. Based on the results of observations and interviews conducted, the utilization of CS Unplugged provides a learning experience that builds on the initial concept of how computers work. This is shown by an increase in students’ motivation and enthusiasm in learning how the computer works. This experience is what then makes it easy for students to do various computer assembly experiments using Raspberry Pi.
Smart education: educational service system for equal quality education
Authors: Putra R R J , Putro B L 
Published: November 2019

Abstract
The problem of unequal quality of high school education in West Java with the viewpoint of Senior High School (SMA) due to the assessment of the quality of education in Indonesia is still focused on Students, Teachers, Principals, and Parents separately. Supposedly the assessors of high school quality are assessed based on an education service system (ESS). Research studies related to high school as an educational service are well suited to a service science approach, and the term educational service system. The ESS study discusses educational sector issues in the perspective of a service system consisting of components, functions, interfaces, component linkages, inputs, processes, and outputs. The purpose of this research is to create educational service system model to improve the quality of high school education services in West Java. Creation of ESS Model with service engineering method with stages: service innovation, service engineering, and service measurement. Output of Educational Service model System in the form of learning management system (LMS) based on Moodle. The prototype measurement result ESS model shows the efficiency of high school education service system. The research output is expected to solve the problem of equalization of high school education quality in West Java.
Creative learning model as implementation of curriculum 2013 to achieve 21st century skills
Authors: Putro B L , Waslaluddin  , Putra R R J , Rahman E F 
Published: November 2019

Abstract
The 21st century learning model is a way/technique used by teachers to facilitate the best child learning safeguard according to child’s condition, child’s learning environment, and carrying capacity. The characteristics of learner of the 21st century is important for teachers and parents to know how to facilitate their learning. Mitchel Resnick developed a Creative Learning Cycle method that promises to improve 21st century skills. Creative Learning Cycle method is suitable for elementary school. Creative Learning Cycle consists of 5 stages: Imagine, Create, Play, Share and Reflect. The purpose of this research is to create creative learning model as implementation of curriculum 2013 at elementary school in Bandung to reach 21st century skill. This study uses the correlation method between 21st century learning methods, 2013 curriculum, and 21st century skills. Creative Learning Model as a Learning Implementation of Curriculum 2013 has a positive effect on the achievement of 21st Century Skills students though not all of them have a significant influence.
Academic buoyancy of science student in senior high school: analysis and implications for academic outcomes
Authors: Mawarni A , Sugandhi N M , Budiman N , Thahir A 
Published: November 2019

AbstractAcademic buoyancy is a very important ability to be possessed by students in the face of the typical academic setbacks and challenges in the daily life of students at school, but in the development of academic buoyancy of students are still questionable. The purpose of this research is to find out the academic buoyancy of science students and to find out the academic buoyancy of science students based on gender and also age at high school level. This research uses mix methods approach with concurrent embedded strategy. The sample of research involves 289 students of science class XI of senior high school in Bandung City on Academic Year 2017/2018 using random sampling. The findings of the study showed that science students need to have higher academic buoyancy compared to other students, the male students of science have higher academic buoyancy than female students of science, and the science students who have higher academic buoyancy are at age of 18 and 15. These results are presented in an implication analysis for academic outcomes.
Empowering critical thinking skills with problem solving in higher education
Authors: Utami B , Probosari R M , Saputro S , Ashadi  , Masykuri M 
Published: November 2019

Abstract
Critical thinking skills are a necessary aspect of 21st century skills. Based on Facione, critical thinking skills include aspects of interpretation, analysis, evaluation, inference, explanation, and self regulation. The purpose of this study is to know the critical thinking skills of students with problem solving model in the scientific method course. The classroom-based action research was held in one of the science education programs in Central Java. Data sources are collected through portfolios, discussions and presentations and field observation records in the classroom. Student’s critical thinking skills were observed and analyzed. the result of the research shows with problem solving model of students’ critical thinking skill in interpreting, analyzing, concluding in very good category, and evaluating, explaining, and self-regulating in good category.
The reconstruction of preservice elementary teachers’ conception about free fall using cognitive conflict strategy
Authors: Anggoro S , Widodo A , Suhandi A 
Published: November 2019

Abstract
Misconception about Free Fall have many experienced by preservice elementary teachers. It was caused by their teachers has not understood these concepts and how to teach it. This study aim analyzed a conceptions reconstruction on remedial teaching using Cognitive Conflict Strategies developed about Free Fall concept. The research method used is mixed methods with Intervention Mixed Methods Design. The participants are preservice elementary teachers’ in one of private university in Central Java who take the Second Basic Concept course. The results have shown that Cognitive Conflict Strategy is effective to reconstructing the conception of preservice elementary teachers on Free Fall using remedial teaching. This is indicated by most of them have experienced conceptual change with the revision level in every misconception that occurred in the prior conception. The research recommendations are the lecturer of Basic Science, which have elementary school graduates background generally, should have to collaborate with Physics and Biology lecturer to develop a scientific concept understanding by using learning model that can reconstruct the student conception.
‘Surala Ninja!’: a mathematics e-learning based on learning management system as an alternative learning in elementary school
Authors: Marwati R , Fujihira T , Furuoka A , Yulianti K 
Published: November 2019

Abstract
e-learning based on Learning Management System (LMS) has contributed a lot to the education system. e-Learning based on LMS includes learning management, student management, evaluation management components, online practice, online material content, online assessment. ‘Surala Ninja!’ is a mathematics e-learning for elementary level. It will examine how ‘Surala Ninja!’ e-learning meets LMS components and how ‘Surala Ninja!’! LMS improves numeracy skills, trains mathematical thinking, embed learning characters, and compares it with the 2013 school curriculum. The results show that although ‘Surala Ninja!’ content and the low-level curriculum is sliced mainly, but ‘Surala Ninja!’ contains a lot of reinforcement and deepening of materials that not provided in school, so that LMS-based e-learning is an alternative for individual learning.
PBL-team teaching on developing vocational mathematics textbook
Authors: Maharani A , Darhim  , Sabandar J , Herman T 
Published: November 2019

Abstract
The textbook that is used today in some Vocational School in Cirebon region is a textbook of Mathematics for Vocational School from certain Publishers. Although the government once published textbooks for Vocational School, but almost no more teachers use it. Teachers generally complain about the available textbooks in terms of their practicality and effectiveness. According to them, the existing book has too broad a material coverage. In addition, there is no specific book available for use by vocational students to make vocational high school students are not motivated to learn math. This paper explores the development of mathematics textbook which can be used as one of learning resource for vocational students of competence of light vehicle engineering skill and business and motorcycle technique. The research method used is R & D. The research product was in the form of a mathematics vocational school textbook of Geometry & Measurement material designed according to the PBL model and presented through the team teaching method. The results showed that the book had a very valid level of validity. Through the use of this textbook, student can apply mathematical theory to vocational practice.
The enhancement of mathematical problem-solving skill and self-efficacy achievement through thinking actively in a social context learning model
Authors: Septiyana W , Asih E C M , Dasari D 
Published: November 2019

Abstract
Mathematical problem-solving skill becomes the main tool of learning mathematics to develop thinking habits and establishes students’ self-efficacy in their skill to face problems. Thinking actively in a social context (TASC) learning model is expected to enhance this skill. This research was quasi experiment by non-equivalent control group design with seventh grade students in one of Bandung Junior High School as a research subject. The number of participants was 52 students. The instruments that used were problem solving skill essay and self-efficacy questionnaires. This research generated the enhancement of problem-solving skill students who receive TASC learning model are higher significantly than students who receive scientific approach learning. Looking back for the whole piece of learning is not already become a student habit at the evaluate stage. Less accuracy of the students in understanding part of the problem indicated errors resulted from inappropriate strategy.
Problem based MHM-Strategy to enhance junior high school students mathematical creative problem solving ability and mathematical disposition
Authors: Miliyawati B , Herman T , Turmudi  
Published: November 2019

Abstract
This article presents the results of research on the development of mathematics learning with problem based Mathematical Habits of Mind (MHM) strategy to enhance mathematical creative problem solving (MCPS) ability and mathematical disposition. Quasi experimental research with posttest control group design involved 146 eighth grade students from two State Junior High Schools in Subang regency, each consisting of two classes. The instruments used were tests MCPS ability and mathematical disposition. Research data of students pretest, posttes, and normalized gain scores for MCPS ability were analyzed using two-way ANOVA and Mann Whitney. Based on data analysis results, it is found that there is a significant difference in the enhancement of students MCPS ability and mathematical disposition of students between the experimental and control groups at the high and medium school levels. On the other hand, there is a difference in mathematical disposition in terms of school level. Meanwhile, there is an interaction effect between problem-based MHM strategies and school-levels on the student’s mathematical disposition. Conclusion, that the enhancement of MCPS ability of students who were taught with problem-based MHM strategy is significantly greater compared conventional learning in terms of school level.
Analysis of madrasah Tsanawiyah students for statistical literacy abilities
Authors: Maryati I , Priatna N , Martadiputra B A P 
Published: November 2019

AbstractJunior high school students’ low statistical literacy ability was the focus of the problem in this study. The purpose of this study was to analyze statistical literacy ability of VII grade students Madrasah Tsanawiyah Negeri 1 Kabupaten Garut Academic Year 2016/2017 in statistics material especially statistics material that is related with data distribution and data centralization based indicators of statistical literacy abilities in terms of reading statistical data, understanding the concept of statistics, communicating statistical data processing, and presenting the results of statistical data processing. The research method used in this study was descriptive qualitative study with study case design. 35 students became subjects for this study. The result of data analysis shown students’ abilities in reading statistical data given in the form of table, diagram, and chart was 35%, students’ abilities in understanding concept was 32%, students abilities in communicating data processing was 28%. As for the conclusion from the data analysis could be categorized as low because there were many students that below the minimum mastery criteria.
Analysis of students’ conceptual and procedural understanding of linear programming
Authors: Khairunnisa  , Darhim  
Published: November 2019

Abstract
Conceptual understanding is an understanding of theories, facts, rules, descriptions, and terminology of mathematics as well as all relevant information while procedural understanding is the procedure or set of rules (mathematical formula) to calculate or solve problems. Linear programming is a mathematical content very closely with procedural. The purpose of this study was to analyze the conceptual understanding and procedural understanding mathematics education students in the program linear material which familiar with the procedure. This research was conducted at a university by descriptive quantitative research methods using the test as an instrument for analyzing the students’ abilities of in the form of a percentage. The results showed that 1) Students could graphically depict but have difficulty in language description. 2) Less than half students were able in connecting information. 3) More than half of students able to do the step by step procedures, but only two people who remember to emphasize the answer
Is functional skills mathematics approach relevant to stimulate students’ mathematical problem solving?
Authors: Oktaviyanthi R , Agus R N , Supriani Y , Sholahudin U 
Published: November 2019

Abstract
This study described the stimulation structure of problem-solving skills obtained by students who were taught mathematics using functional skills mathematics approach. A descriptive exploratory qualitative approach was used to examine the students’ stimulation structure. Participants included three students from different level of mathematics ability in the second semester students of mathematics education program at Universitas Serang Raya. The data gained from the students’ problem-solving working collaborated with in-depth interviews focused on the students’ thinking refers to the functional skills mathematics completeness indicator. Exploration results showed the percentage of stimulation for each student of high, moderate and low mathematics ability are 81.8%, 54.5% and 36.7%. The relevance of the implementation of the functional skills mathematics approach was explained in more detail in the discussion.
The application of problem based learning model to improve mathematical cognitive skill and students engagement toward curved-face three-dimensional objects in IX grade of SMP Laboratorium Percontohan UPI
Authors: Hidayat A S , Haryanto D 
Published: November 2019

Abstract
As an effort to improve the quality of learning in the classroom, a teacher needs to consider an effective and appropriate learning model, so that it can develop mathematical cognitive skills and student’s engagement. A learning model issued in this investigation is Problem Based Learning (PBL), which is implemented to IX grade students of SMP Laboratorium Percontohan UPI. This investigation is aimed to (1) measure, (2) find out the improvement process, and (3) improve mathematical cognitive skill and student’s engagement toward curved-face three-dimensional objects using PBL model. The result of this investigation shows that the mathematical cognitive skill and students’ engagement can be improved. The average score test in cycle I is 69.9, then 81.7 in cycle II and become 85.8 in cycle III. Furthermore, this PBL model is able to improve the student’s engagement and accomplishment. In cycle I, the student’s accomplishment reach 34.37%, in cycle II reach 75%, then reach 90.625% in cycle III. From these results, the investigator concluded that PBL model can improve students’ mathematical cognitive skills and engagement. Therefore, the investigator suggests that the PBL model can be applied by teachers to other materials dan used as an alternative in learning mathematics at school.