bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of wolfram mathematica application-assisted learning module on derivative in high school
Authors: Musyrifah E , Rabbani H , Sobiruddin D , Khairunnisa  
Published: March 2021

Abstract
One of the benefits of studying derivatives is determining the best way to solve a problem. The available textbooks seem monotonous and do not allow students to understand the derivative concepts presented actively. This study aims to develop teaching materials in learning modules in the Function Derivative material assisted Wolfram Mathematica application using the ADDIE development model (Analysis, Design, Development, Implementation, and Evaluation). Data obtained from experts and students were analyzed using descriptive quantitative. Experts assess that the learning module made through the ADDIE stage is very eligible for students. Students also assess that the module is very suitable for use. This research and development still require a further assessment at the evaluation stage with summative types to obtain a maximum final product.
Laboratory activity-based learning to improve generic science skills on the concept of sensory systems
Authors: Hayati A , Juanengsih N , Fadlilah D R 
Published: March 2021

AbstractAccording to the previous research, generic science skills are part of 21stcentury skills. It contributes to individuals’ practical and successful participation in the surrounding environment. Therefore, students supposed to be prepared to have generic science skills. These can be trained or honed through learning process that solves the problems. However, based on pre-observation, the reality was different. The teacher plays a role as a providers of knowledge, thus the students are not trained through solve the problem. Practicum is one of learning method/ process that contains generic aspects. Practicum is frequently conducted in the laboratory. Thus, this study aims to improve generic science skills through laboratory activity-based learning on the concept of sensory systems. The research method was quasi-experimental with a non-equivalent control group design. The sample consisted of 71 students in the two experimental and control groups. Generic science skills include direct observation, indirect observation, causality, modelling, logical inference, and abstraction. Research instruments using essay tests and observation sheets. The results showed that there was an effect of laboratory activity-based learning on generic science skills. Students’ generic science skills in the experimental group were better than the control, particularly in direct observation aspect as well as causality, modelling and logical inference.
Application of Genetic Algorithm to Optimize Lecture Scheduling Based on Lecturers’ Teaching Day Willingness
Authors: Subagio Ridho Taufiq , Kusnadi  , Putri Tiara Eka , Sokibi Petrus , Harahap Syaiful Zuhri , Darmansah  
Published: March 2021

Abstract
The scheduling of lectures is an important activity that is carried out every beginning of the semester. The process of making a lecture schedule in the Informatics Engineering Study Program of Universitas Catur Insan Cendekia Cirebon still uses office applications, so it takes a long time to complete. This is because certain criteria or conditions that make the scheduling of lectures complicated, such as the willingness of teaching days and courses for each lecturer to differ and the availability of parallel classes. The research methods used consist of several stages, namely data collection, analysis, and system design, as well as the implementation of software created. The method of data collection used is observation and library study. The method of analysis and design of the system used is Object-Oriented Analysis (OOA) using Unified Modelling Language (UML). Applications created using the PHP programming language with the Yii Framework and MySQL as databases, as well as applying genetic algorithms to solve scheduling problems. The result of this research is a lecture scheduling application used by BAAK Staff to create a lecture schedule in the Informatics Engineering Study Program. The application of this application can save time in the creation of lecture schedules.
Online Learning Based on the MIKiR Approach during the Covid 19 Pandemic at MIS Muhajirin Jambi City
Authors: Fatmawati Kiki , Siregar Nasyariah , Mukminin Amirul , Anwary Al , Ikhtiati  , Azim Paujan 
Published: March 2021

Abstract
Online learning using multiple platforms will be more effective when juxtaposed with other methods or approaches. This study aims to determine the online learning process based on the MIKiR Approach during the Covid 19 Pandemic at MIS Muhajirin Jambi City. This research is a qualitative descriptive field research. This research was conducted at MIS Muhajirin Jambi City. The subjects of this study were teachers and students of grade VI. Data collection was taken through interviews, observation, documentation and field notes. The author takes the role of a direct interviewer to explore more complete data for teachers and students. Thinking is a learning approach that was initiated by the Tanoto Foundation in 2018. Thinking stands for Experiencing, Interaction, Communication, and Reflection. The results showed that the online learning process based on the MIKiR approach began with the preparation of a learning implementation plan and the preparation of media and learning resources, learning assessment tools and learning scenarios along with Student Worksheets (LKPD) based on the “MiKiR” approach. The implementation of learning with learning steps consists of experiencing activities, interaction, communication, and reflection. Assessment is carried out by the teacher by assessing the assignments sent by students through google classroom to be used as a portfolio. Each lesson uses a learning approach to think, the teacher always tries to be creative and innovative in preparing teaching materials and learning scenarios.
Development of Interactive Learning Multimedia Using the Drill & Practice Model on Scientific Literacy of Junior High School Student
Authors: Lia L , Zulkardi  , Wiyono K 
Published: March 2021

Abstract
The purpose of this study was to develop interactive learning multimedia using the drill & practice model on the scientific literacy of junior high school students which had validity, practicality, and potential impact. This study used Frey and Sutton’s development research model which combined formative evaluation from Tessmer. This study was tested on junior high school students. Data were obtained from interviews, documentation, walkthrough, questionnaires, and tests. Based on the expert reviews, this interactive learning multimedia was declared very valid with an average score of 0.99 (the maximum score is 1). In the one-to-one evaluation, it was declared very practical with an average score of 0.83 (the maximum score is 1). In the small group evaluation, it was declared very practical with an average score of 3.34 (the maximum score is 4). In the field test, the average classical test result was 62.18 with a good category. From the research data, it can be concluded that interactive learning multimedia using the drill & practice model on the scientific literacy of junior high school students was feasible to use in learning. The research results imply that students can understand science with the help of interactive multimedia learning which can have an impact on students’ scientific literacy.
High School Students’ Experience Using Learning Management System on Chemistry In Age of Pandemic
Authors: Putro Tomas Istantyo , Budi Utomo Suryadi , Yunita Indriyanti Nurma 
Published: March 2021

Abstract
During the pandemic, LMS is getting popular for facilitating learning. LMS is a software application for network or online activity and an electronic learning program (e-learning program). This study aims to identify high school students’ learning chemistry experience with the Learning Management System (LMS) in the Pandemic Era. Fifty-four high school students of 12th grade from high schools in Karanganyar, Indonesia, participated in this research. The survey was used as the methodology. The survey instrument consists of 33 items, which are divided into six parts: student profile, analysis of the needs of internet, analysis of the needs of mobile phones, analysis of the implementation of learning chemistry during the pandemic, LMS application that has been used, and the mobile learning design expectations. The finding shows that most students use the internet more than 5 hours a day with the main priority for online learning, so they are consuming 10-20 GB of internet data per month. In online learning, most students use mobile phones. During the pandemic, the learning majority only consisted of assignment to practice problems via Whatsapp Group, Google classroom, Microsoft Teams, Google form, or watching videos via YouTube. With LMS, students feel sufficient and comfortable to support learning during this pandemic. Chemistry LMS is expected to contain a collection of materials, virtual, practice questions, a set of formulas, and animation.
The relationship between students’ problem solving skills and scientific attitude with students’ learning outcomes on stoichiometry at tenth grade at high school in Boyolali, Central Java, Indonesia
Authors: Kusuma Asri Kurniawati , Utami Budi , Mulyani Bakti 
Published: March 2021

Abstract
Student’s learning outcomes are influenced by several factors, both internal and external. Problem solving skills and scientific attitudes are internal factors affecting students’ learning outcomes. This was a quantitative research with the correlational approach and quantitative descriptive method. The populations were grade X science program students at SMA Negeri 1 (Senior high school) Boyolali, Surakarta, Central Java, Indonesia, academic year of 2019/2020. The data were analyzed with the correlation and regression analysis. The results showed the significant positive relationship between problem solving skills with students’ learning outcomes with the correlation coefficient value of 0.845 and determination coefficient of 71.4%; the significant positive relationship between scientific attitude with students’ learning outcomes with the correlation coefficient value of 0.926 and determination coefficient of 85.7%; and the significant positive relationship between problem solving skills and scientific attitude with students’ learning outcomes with correlation coefficient value of 0.936 and determination coefficient of 87.5%. The effective contribution of problem solving skills was 20.45%, and the scientific attitude was 67.05%. The relative contribution of problem solving skills was 23.4%, and the scientific attitude was 76.6%.
Performance asessment to measure students’ explanations in chemistry learning
Authors: Utami Budi , Saputro Sulistyo , Ashadi  , Masykuri Mohammad 
Published: March 2021

Abstract
One of the components of critical thinking is an explanation. This study aims to identify critical thinking skills in aspects of explanation using a performance assessment rubric. To measure students’ scientific explanations in chemistry learning, a performance assessment rubric is needed. The arrangement of rubrics based on indicators of students’ scientific explanations on chemical equilibrium material. This research uses the RASCH analysis model, the instrument was in good category. The number of samples is 122 students from one senior high school in Surakarta, Central Java, Indonesia. The results showed students still had difficulty explaining ideas, students had difficulty explaining phenomena and connecting with relevant information.
Instrument Development For Evaluating Students’ Employability Skills
Authors: Fajaryati Nuryake , Budiyono  , Akhyar Muhammad , Wiranto  
Published: March 2021

AbstractAn assessment on the level of employability skills of students is deemed necessary, given the employers’ need for skills that must be mastered by job seekers. The purpose of this study is to create an instrument that is able to assess the level of mastery of students’ employability skills. Instrument making was carried out through seven stages: composing of variable constructs, preparing of instrument lines, arranging the instrument items, conducting content validation, testing instrument, conducting the consistency analysis of items, and estimating the reliability coefficient of instruments. Based on the instrument making process, it has been found out that the construct of the measured employability skills variable includes the skills of communication, teamwork, problem-solving, and technology utilization. Subsequent stages were carried out procedurally and content validation was carried out until obtaining the expert approval. The process of analyzing the consistency of items and estimating the reliability coefficient of the instrument was conducted using the SPSS. The results of the consistency analysis of items with SPSS showed seven statement items that had an internal consistency index below 0.3. As a consequence, these items were not used for not representing the construct of the measured indicator. After doing the item consistency analysis, 49 good items were obtained and the instrument reliability coefficient was estimated. Based on the analysis results, the reliability coefficient of the instrument obtained the value of 0.905. As the results obtained were more than 0.7, the instrument was then stated to be reliable and could be used as a data collection tool.
A Framework of Science Based Entrepreneurship Through Innovative Learning Model Toward Indonesia in Society 5.0
Authors: Sajidan  , Atmojo Idam Ragil Widianto , Febriansari Devie , Suranto  
Published: March 2021

Abstract
A technological development has extremely changes the value of society which is now moving to society 5.0. It is an era in which technology is being a part of human life. Internet is supposed not only to be an information media but also becomes a part of life including in education. Society 5.0 requires students to have the ability to solve complex problems, think critically, and be creative. This ability is needed to adopt the development of science and technology, not only as a “taker” but also as a “maker” through entrepreneurial principles. Therefore, the learning system should move to the concept of science-based entrepreneurship (SciPreneur). However, the current entrepreneurial learning system has not adopted the learning paradigm emphasizing on cognitive understanding because the learning process is still either theoretical-based or rote learning. Therefore, we need an appropriate learning model to accommodate a learning system to meet the society 5.0. In this paper, we introduce a framework on science-based entrepreneurship using the discovery ability-based creative entrepreneurial learning model (CEL-BaDiS UP). This model is expected to enhance a science-based entrepreneurship skill.
Graphene Sensor for Future Local Economic Development: A Review
Authors: Muslihati Atqiya , Basri Hatijah , Wibowo Kusnanto Mukti , Sahdan Mohd Zainizan , Rosni Nurliyana Md 
Published: March 2021

Abstract
Graphene, a family of carbon has been known as a superior material of both conducting and transparent. Therefore, graphene is very promising material for many applications on microelectronics and nanotechnology. The structural, thermal, optical and electrical properties of the graphene were also potential to be applied on sensor. Graphene is the most recognized nanoparticle for fabrication of biomedical sensors due to its stimulating qualities such as excellence aqueous process ability, functional surface properties, surface-enhanced Raman scattering, cell growth ability, and good biocompatibility. Due to the high specific surface area of graphene, it was very excellent material for gas sensor application. The outstanding properties of graphene were also led to increasing the demand of graphene every year which is dominated by China (70%), India (14%), and Canada (2%). Moreover, current marketplace of graphene was also dominated for academic research, super capacitor, ITO, and sensor. Every year, the market of graphene sensor is continuously increasing. This trend reveals graphene-based sensors very promising commodity for future technology. The present study highlights the state of art review and potential future local economic development of graphene for use as sensors.
Learning Obstacle of Addition Operation Whole Number in Elementary Schools
Authors: Sidik Geri Syahril , Suryadi Didi , Turmudi  
Published: March 2021

Abstract
This study aims to analyze the learning obstacle of students in elementary schools on the addition operation whole number. The research method used is a qualitative descriptive research method. The subjects of this study were 15 elementary school students who were selected using a purposive sampling technique. Data collection techniques include non-participatory observation, test of addition operation whole number in the form of story questions, unstructured interviews, and documentation studies. The results showed that there were learning obstacle for elementary school students found in the addition operation whole number including: 1) students had difficulty understanding the meaning of the questions; 2) students have difficulty understanding the concept of place value; 3) students have difficulty translating questions into math sentences; 4) students have difficulty doing addition calculations, other than the pattern a+b=?; 5) students have difficulty giving conclusions from the results of their work; and 6) students do not have confidence in solving problems. This study concludes that students experience three types of learning obstacles, namely: ontogenic obstacle, didactical obstacle, and epistemological obstacle. The implications of the results of this study can be used as an analysis of student learning needs and the factors that affect student learning difficulties, especially in mathematics.
The Development of Guided Inquiry Based Science Basic Concept Teaching Materials
Authors: Ula Wahyu Rofikhatul Rikha , Mariyani Anna 
Published: March 2021

AbstractNatural Science is mostly delivered using the lecture method and providing exercises or written assignments as well as laboratory activities which are limited to carrying out the activity steps according to the worksheets used. In this case, the educators do not provide opportunities for students to conduct experiment according to their ideas and knowledge. As a result, the process of learning becomes less interesting and meaningful. The purpose of this study was to determine the development of guided inquiry based science basic concepts teaching materials. The method used in this study was a research and development. This study was conducted in several stages, they are define, design, develop, and disseminate. This study was conducted at STKIP Muhammadiyah Blora by using the research data sources that derived from experts, professionals, educators, and students. The results of this study indicated that; (1) the define stage was carried out by using front end analysis (FEA) which consists of field studies and material analysis; (2) the planning stage (design) begins with the preparation of learning tools, preparation of questionnaire guidelines, observation, interviews, preparation of guided inquiry based teaching materials, and restrictions on the scope of the research; (3) the development stage (develop) was conducted through two steps, namely; 1) expert judgment followed by revision; 2) limited scale trial and error. The results of the validation of the feasibility of teaching materials for the guided inquiry based science basic concepts obtained an average percentage of 83% with feasible criteria; and (4) the product dissemination stage in the form of guided inquiry based science basic concepts teaching materials conducted on lecturers and students. The conclusion of this study is that guided inquiry based teaching materials are suitable to be used for teaching. The implication of this study is that the development of guided inquiry based science basic concepts teaching materials can increase the activity of students in the learning process.
Tar Kinetic Parameters of Pyrolysis Processes of Brem, Plastic, and Durian Skin Waste with Temperature Variations on A Rotary Kiln
Authors: Majedi Farid , Arifin Agus Choirul , Asngali Bi , Wahyu Barkhawa Handi 
Published: March 2021

Abstract
Pyrolysis is a decomposition process chemical ingredient by adding the heating process without oxygen, where is the raw material/biomass will experience the breakdown of chemical structures to the gas phase. It produced char, tar, and gas. This research uses a rotary kiln system, in which the pyrolysis tube is rotated at low speed. Biomass in a rotating pyrolysis tube has an even heat. The pyrolysis temperature used in this research is 523K, 57K, 623K, 673K, The heat in the pyrolysis tube comes from heating the LPG stove. The heating is adjusted in such a way that the heat can be reached at the desired temperature. The tar formed in the pyrolysis process is calculated its kinetic rate value. The biomass used in this study is a waste of brem, plastic, and durian skin. The results showed that with increasing temperature, the tar volume would increase. The value of the kinetic rate is strongly influenced by variations in pyrolysis temperature. The pyrolysis temperature is large, so the kinetic rate is also large. The best kinetic rate at a temperature of 673 K in all biomass. The type of biomass can affect the kinetic rate. Plastic waste biomass has the smallest kinetic rate value compared to other biomass. The density of bio-oil will decrease with increasing pyrolysis temperature.
Design of Generator HHO Dry Cell Type and Application on 110 Cc Engined Vehicles Towards Gas Emissions
Authors: Puspitasari Indah , Wahyudi Noorsakti , Fakhrudi Yoga Ahdiat , Priyo Wicaksono Galih 
Published: March 2021

Abstract
The HHO generator is a tool that works on the principle of water electrolysis to produce HHO gas, which is a gas consisting of 2 hydrogen molecules and 1 oxygen molecule where the gas can be used as fuel. The number of holes on the plate electrodes affects the amount of discharge and the efficiency of the HHO generator. Therefore, a study was conducted regarding the number of holes on the electrode plate. The parameters measured were voltage, electric current, electrolyte temperature in the reservoir tank, electrolyte temperature in the HHO gas cylinder, and the HHO gas discharge. Whereas what is calculated is the power required for the HHO generator, the production rate, and the efficiency of the HHO generator. Furthermore, the HHO generator was applied to a 110cc vehicle to measure the level of exhaust emissions. Based on the results of the study, the best variation of HHO generators is found in the hole plate electrode 2 with the required power of 180.78 watts and an efficiency of 63.8%. The lowest CO emission levels were in the 2 holes variation, namely 4.01%, and the lowest HC emission levels were in the 4 holes variation, namely 892 ppm.