bluuebunny/crossref_metadata_2025_split huggingface dataset:
Students’ Level of Knowledge of Laboratory Equipment and Materials
Authors: Restiana  , Djukri  
Published: March 2021

AbstractBiology Laboratory is an essential variable in determining the quality of secondary school output. Sufficient laboratory equipment suitable for teaching in secondary schools helps improve students’ skills. Knowing the equipment and materials in the laboratory supports the students in the learning process in the laboratory. This study aims to identify the level of students’ knowledge of laboratory equipment and materials. It used a survey method with a sample of 106 high school students from grade XI in Yogyakarta. The data were collected by testing the students’ level of knowledge of laboratory equipment and materials. Then, the data were analyzed by calculating the average percentage and grouped them into a range of category values. The results showed that the level of students’ knowledge of the laboratory equipment is quite good; the level of students’ knowledge of the function of laboratory equipment is good; and the level of students’ knowledge of the procedure to use the laboratory equipment is good. Moreover, the level of students’ knowledge of the characteristics of laboratory materials is good and the level of students’ knowledge of the group or categorization of the laboratory materials used in practices for certain subjects is poor. The low knowledge of students about laboratory equipment and materials is due to the lack of time allocation for the teacher’s explanation about the laboratory equipment and materials and the practicum guidelines used do not summarize the laboratory equipment and materials. Therefore, further research is expected to develop practicum guidelines that contain detailed information on laboratory equipment and materials.
Calibration for Instrument Argumentation Skills on the Subject of Fluid Statics Using Item Response Theory
Authors: Affandy Harry , Arya Nugraha Dewanta , Nourma Pratiwi Scundy , Cari C. 
Published: March 2021

Abstract
This study aims to calibrate the instrument of argumentation skills on the subject of Fluid Statics using item response theory (IRT). The blueprint instrument developed based on the aspects and sub-aspects of argumentation skills, totaling 20 items. The scoring uses the Partial Credit Model (PCM) principle in 4 categories. Subjects involved in the study were 206 undergraduate students at two different universities. The validation of the instrument using expert judgment techniques, which consisted of linguists, physicists, and educational measurement experts. Instrument calibration for argumentation skills is carried out by (1) analysis of item fit with PCM by testing goodness of fit items, (2) testing prerequisite analysis, (3) reliability, (4) difficulty level, and (5) Standard Error of Measurement (SEM). The test developed is valid with Aiken V index values in the range 0.93 to 1. The analysis of IRT assumptions uses two parameters, the adequacy test of the sample and the factor analysis. The Chi-Square value in the Bartlett test is 2202.67 with df 190, and a p-value value (Sig.) <0.05 indicates that the sample size used has met the unidimensional requirements. The instrument developed has met the criteria for scoring the Polytomus items, based on a) the MNSQ INFIT value is in the range of 0.70 to 1.30, and b) the difficulty index test is in the range -2.00 <b <2.00. The results of the reliability estimate on the test equipment obtained a reliability value of 0.86, which means that the reliability of the test is in the high category. The graph of the information function and SEM converge on the ability scales of -2.8 and +1.5, meaning that the skills test kit argues it is suitable for testees in the low to moderate ability range.
The Development of HOTS-Based Mathematics Teaching Materials in Elementary School
Authors: Nurlaily Vivi Astuti , Sholihah Husna Imro’athush , Wulandari Rizki Ayu , Sa’diyah Arifatus 
Published: March 2021

Abstract
Teaching material is one component that occupies an important role in the learning process. Teaching material with HOTS component will be able to clearly distinguish ideas or ideas, argue well, be able to solve problems, be able to construct explanations, be able to hypothesize, and understand complex matters more clearly. The research aims to produce valid, practical, and effective HOTS-based mathematics teaching materials in elementary schools. The research type is research and development (R&D). The subjects of this study were students and teachers of SDN 4 Ngawen Blora. Data collection techniques used were interviews, questionnaires, and tests. The research result presented is based on the results of limited trials. To this research, it was found that the average mathematics learning achievement increased from 57.50 to 86,50. The prototype of HOTS-based mathematics teaching materials that was developed has shown good results with a percentage of assessment by the teacher of 95.45%. Students show an interest in HOTS-based mathematics teaching materials. Students feel challenged by the activities and learning activities presented. However, a few things need to be fixed, that is unclear pictures of the presentation aspect to students. Additionally, the teacher also provides suggestions and input on improvements to the HOTS-based mathematics teaching material prototype. The suggestion given includes replacing unclear images and providing explanations that match with the image, enlarging the image size that contained in the prototype, and correcting typographical errors. Moreover, the revised prototype results will be used in further trials.
Developing HOTS-based Model to Improve Mathematical Problem Solving Skill of Elementary School Teacher Education (PGSD) Students
Authors: Nurwulandari Ika , Rofiq M Aunur 
Published: March 2021

Abstract
The purpose of this development research is to produce Higher Order Thinking Skill (HOTS)-based pre-service training model for students of PGSD Study Program of STKIP Muhammadiyah Blora who take Mathematics I courses. The teaching materials are in the form of HOTS-based teaching materials and evaluation questions to measure students’ mathematical problem solving abilities. Teaching materials developed meet valid and effective criteria. This type of research is development research following Borg and Gall procedures. This research leads to the improvement of students’ mathematical problem solving abilities after applying Mathematics based on Higher Order Thinking. In addition, through this teaching material, students become accustomed to high-level thinking so that they are able to solve any mathematical problems given even the average student’s mathematical problem-solving ability was increased from 57.50 to 87.90. Thus, the development of HOTS-based mathematics learning modules can improve students’ mathematical problem solving abilities.
Analysis of Changes in Forest Health Status Values in Conservation Forest (Case Study: Plant and Animal Collection Blocks in Wan Abdul Rachman Forest Park (Tahura WAR))
Authors: Safe’i Rahmat , Darmawan Arief , Kaskoyo Hari , Rezinda Citra Farshilia Gayansa 
Published: March 2021

Abstract
Data and information on the health condition of conservation forests can be obtained by periodically monitoring forest health. Forest health monitoring is intended to monitor, assess, and report on the current status, changes and long-term trends in the health of forest ecosystems. This study aims to obtain changes in the value of the status of conservation forest conditions. The location of this research is in the Wan Abdul Rachman Forest Park (Tahura WAR) in the plant and animal collection block area. This study used the Forest Health Monitoring (FHM) method with a sample measuring plot in the form of six FHM clusters. The stages of this research are making measuring plots, monitoring forest health, and assessing the health of conservation forests. The results showed that the change in the value of the status of the health condition of conservation forests was that the cluster plots 1, 2, and 5 had changed and the cluster plots 3, 4, and 6 did not change. Thus there is a change in the value of the health status of conservation forests which tends to be better.
The Conceptual Framework for Problem and Research-Based Learning (PRBL) Model in Learning The Natural Sciences to Empower Students’ Analytical Thinking Skills
Authors: Suyatman  , Saputro Sulistyo , Sunarno Widha , Sukarmin  
Published: March 2021

AbstractAnalytical thinking skills are part of critical thinking skills and higher-order thinking skills that are the demands of students in the 21st century. This study aims to produce a conceptual framework for a model in science learning to empower students’ analytical thinking skills. The method used in this study was a qualitative method, with the primary source was literature review. Data collection techniques employed literature study which collected data through books and journals. The data obtained from the literature were collected and processed by editing, organizing, and finding the results. Data analysis in this research was content analysis to analyze in-depth the contents of the literature being studied. The results of this study consisted of: 1) The conceptual framework of the modified science learning model is called the problem and research-based learning (PRBL) model, 2) The modified PRBL model has the potential to empower students’ analytical thinking skills. This study illustrates to lecturers and subsequent researchers that the modified PRBL model demonstrates the potential to empower analytical thinking skills. The researcher suggests the next researchers conduct research on the application of the PRBL model in the field to test the validity and practicality of the model.
Exposure Factor Control with Exposure Index Guide As Optimizing Efforts in Chest Pa Examination
Authors: Irsal Muhammad 
Published: March 2021

Abstract
Participation between radiographers and medical physicists is needed in optimizing efforts to control the selection of exposure factors by the required clinical radiographic examination. This research is descriptive quantitative by analyzing of exposure index results used in the chest PA examination as an effort to optimizing radiation dose. Also, statistical analysis was carried out to determine the relationship between exposure and the exposure factor using the Spearman test. Results the Spearman test results for underexposure to kV 0.207, and mAs 0.012, meanwhile for overexposed to kV -0.283 and mAs 0.166, the radiographer can make efforts to optimize radiographic examinations by considering the optimal selection of exposure factor parameters which can use a combination of exposure index by assessing the deviation index indicator and maximizing use post-processing or windowing to improve image quality.
The Development of a Four Tier-Based Diagnostic Test Diagnostic Assessment on Science Concept Course
Authors: Fakhriyah F. , Masfuah S. 
Published: March 2021

Abstract
A learning success could be seen from the material mastery and conceptual understanding inculcation obtained by the students. To find out how students’ misconceptions occur, it could be done by developing a diagnostic assessment. This research aims to develop and describe the instrument validity of the four-tier diagnostic test for diagnosing misconceptions by the Primary School Teacher Education program of Universitas Muria Kudus on Science Concept course. This research applies the Research and Development design. It consists of a preliminary study, diagnostic test development, and diagnostic test validation. This article discusses the development and four-tier diagnostic test instrument validation results. The developed instrument consisted of 40 question items. They were Physics and Biology materials. The validation stage involved content and face validities. The expert judgment results showed an average score of 93.09, with very valid criterion. Thus, the four-tier based diagnostic test was valid and could be implemented. The reliability calculation obtained the r-count score = 0.698, while the r-table score = 0.514. The r-count is higher than r-table, then the instrument was reliable. It showed that the instrument was valid and reliable and could be implemented for the students of Primary School Teacher Education. Based on the validation result, the Four-Tier based diagnostic test was valid and reliable to apply for diagnosing the students’ misconceptions in science concept course.
Faculty of Universitas Muria Kudus that allowed us to conduct this research. Thanks to the executive team for assistance.
The Building of Students’ Problem Solving Skills through STEM Aproach with Virtual Simulation Media
Authors: Parno  , Anggraini R T , Hidayat A , Fauziyah S , Pramono N A , Supriana E , Ali M 
Published: March 2021

Abstract
The problem solving difficulty level of the topic of optics is ranked number two among other topics in physics, but the solution to this situation by implementing STEM approach with Virtual Simulation Media (VSM) in Problem Based Learning is still rarely done. This study aims to develop students’ problem solving skills on the topic of optical instrument through PBL-STEM with VSM learning. The type of this research is a quasi-experimental with Pre-and Posttest Design, involving grade XI students in Malang, Indonesia. There are experiment and comparison classes, which received, respectively, PBL-STEM with VSM and PBL learning models. This study uses The Optical Instrument Problem Solving Skills Test with the alpha Cronbach reliability of 0.83. Data were analyzed using the Mann-Whitney U test and independent sample t test, N-gain, and effect size. The results showed that the students in experimental class had significantly better problem solving ability than the students in comparison class. PBL-STEM with VSM class has N-gain in medium category, while PBL class has low category. The two classes had the highest increase in the “useful description” step and the convex lens subtopic, and the lowest increase in the “logical progession” step and the telescope and camera subtopics. The PBL-STEM with VSM class has a practical effect of the “very large” category toward the PBL class in building problem solving skills. Therefore, research of Experiment-Comparison class pair is recommended to be widely implemented in schools as an effort to improve problem solving ability of student.
The Study on Factors Affecting the Synthesis of Methyl Ester Sulfonate from Palm Oil using CaO Catalyst with Microwave-Assisted
Authors: Sahila S , Qadariyah L , Mahfud M 
Published: March 2021

Abstract
Methyl ester sulfonate can be synthesized from palm oil using sodium bisulfite as a sulfonating agent with microwave-assistance as a heating energy source. The use of microwave as an energy source can reduce the reaction time and increase the product. Methyl ester sulfonate can be produced in several stages, that is transesterification, sulfonation, purification, and neutralization. The transesterification process was carried out by reacting palm oil and methanol with a mol ratio of 1:9 and 1%wt of KOH catalyst at a microwave power of 300 watts, and a temperature of 60°C for 10 minutes. Methyl ester was sulfonated using sodium bisulfite at a power of 300 watts for 40 minutes at a temperature of 80°C-100°C. This process also used a CaO catalyst of 1.5% and the mole ratio of methyl ester:NaHSO3 is 1:2. The resulting methyl ester sulfonate was then purified by the addition of methanol and heated in a microwave power of 300 watts, at temperature 55°C for 10 minutes and then neutralized with NaOH. The resulting methyl ester sulfonate has a density of 0.8626 gr/ml, viscosity of 3.51 cSt, pH of 1.68, yield of 98.67%, and surface tension of 32.23 dyne/cm.
Transesterification of Kapok Seed Oil (Ceiba Pentandra) Into Biodiesel Using Natural Zeolite Catalysts
Authors: Sunarti A.R. Yelvia , Roesyadi Achmad , Kurniawansyah Firman 
Published: March 2021

Abstract
Impact due to the depletion of fossil-based petroleum reserves and high level of air pollution due to exhaust emissions from the use of fossil fuels, it is necessary to further develop renewable energy sources. This research carried out the development of the transesterification process of kapok seed oil (Ceiba pentandra) into biodiesel using natural zeolite catalyst of Tasikmalaya. In this study, natural zeolite was modified by chemical activation and calcination at temperature 450°C using furnace. Spectrophotometric analysis of the natural zeolite showed the Si/Al ratio before modification was 0.2542 and after modification, it increased to 0.3339. X-Ray Diffraction showed the presence of Si phase at angle 27° with an intensity of 100% and Al phase at angle of 48° with an intensity of 12%. Brunauer Emmet Teller analysis showed the surface area of the natural zeolite catalyst was 699,820 m2/g. The transesterification process was carried out by reacting kapok seed oil with methanol at ratio of 1: 3, 1: 6 and 1: 9 and reacted at temperature of 50°C, 60°C, 70°C, and 80°C with percent catalyst 5% by weight of oil. The highest biodiesel yield was obtained at operating conditions 60°C with mole ratio of 1: 9 which was 67.90%. The FAME content contained in biodiesel was dominated by ME linoleic at 64.94%, ME oleic by 15.87% and ME palmitate by 14.84%.
Implementation of Industrial 4.0 Library Based on Mobile using QR-Code
Authors: Lestariningsih T , Afandi Y , Kusbandono H , Syafitri E M , Winarno B , Phonistyawati A , Atmaja A P , Suhasto R B I N 
Published: March 2021

Abstract
Libraries are an important element in the world of education so that libraries need to innovate by collaborating library services with technology. AR is the concept of combining virtual objects with real objects that are used to display interesting library service information so that it can improve library performance in providing information to people in need. The purpose of this study was to implement AR using QR-code to facilitate users in terms of college library collection services. In the development of multimedia research methodology, there are six stages, namely 1. concept 2. design 3. material collecting 4. assembly 5. testing 6. Distribution. These six stages can be carried out in an irregular manner, so that the stages of multimedia development can swap positions. But for this stage there is one stage that must be the first thing to do, namely the concept stage. The result obtained is the implementation of AR by using QR-code for library services such as library plans, bookshelves and book synopses in universities.
Android Based Emergency Button with Position Share System
Authors: Setia L D , Yulianto S V , Atmaja A P 
Published: March 2021

Abstract
Development goals on this Panic Button application is to make it easier to call the nearest hospital for help. Panic Button works as a notification or alarm which tells that a danger is happening to an outpatient in emergency level and needs of immediate help. It is an android information-based which make it possible for outpatients to tell or send a notification message to the hospital medical workers when they are in an emergency problem. The system will send a notification after he/she clicks the SOS button. Using this emergency button is only to send a notification message and activate an integrated alarm. This system consists of mobile application, management information system and alarm system which was developed using Arduino Wemos D1 including ESP8266. Android application was developed using Google Firebase System as a notification system. When someone clicks the SOS button, the android application will send a data to management information system through Application Programming Interface (API). While the management information system will switch the alarm status to ‘danger’. The alarm system will check the alarm status frequently through API and if ‘danger’ status is found, it will change its status to ‘alarm’ and ring. All the hospital medical workers who are in charge of the patients who use this android application and is connected through the same system will get a notification message and they can check the source location or call the outpatients using smartphones.
AHP and TOPSIS Integration for Green Supplier Selection: A Case Study in Indonesia
Authors: Utama D M 
Published: March 2021

Abstract
Recently, the problem of global warming arising from manufacturing activities has attracted attention. One of the triggers of global warming is the aspect of production. This aspect requires raw materials supplied by the supplier. The selection of the right supplier by considering environmental aspects can reduce the problem of global warming. The purpose of this study is to integrate the AHP and TOPSIS methods in green supplier selection. Eight criteria are used to select suppliers weighted by the AHP method. AHP weighting results are used to select suppliers with the TOPSIS method. A case study was applied to an offset printing company in Indonesia. The results show that the quality criteria have the highest importance. In addition, the results showed that the AHP and TOPSIS methods were easy to use in Green Supplier Selection.
Face Recognition System using Micro Unmanned Aerial Vehicle
Authors: Atmaja A P , Setyawan S B , Setia L D , Yulianto S V , Winarno B , Lestariningsih T 
Published: March 2021

Abstract
With the price of UAV or people often call Drone getting cheaper, making this technology can be enjoyed not only for limited communities but also for the general public. The camera features mounted on the drone can be used for face detection and recognition. In this paper, we implement Haar-Cascade based classifier for face detection and recognition using OpenCV Python on a micro UAV that only 34.7 gr weight. The face detection process is done in real-time using an FPV camera that is controlled indoors at a distance of less than 50m. From the results of the experiment, it appears that the angle of the face is very influential, especially on the face that is not fully open, like a woman who wears a hijab. The best angle to take is in the position of flying in front of the face in accordance with the slope of the FPV camera mounted on the micro UAV.
Multi Criteria Analysis of Road Handling Type at Banda Aceh – Meulaboh National Road Segment Indonesia
Authors: Isya M. , Fadhly N. , Saputra Arie 
Published: March 2021

Abstract
The western and southern path of highway that connects Banda Aceh to Meulaboh City is national road. The distance between the two cities is 246 kilometers. On the connecting link between the two cities there are at least three locations in the mountainous area. Roads geometric in these locations have low capacity, uphill and downhill with high grade and also have a small curved radius. These conditions cause low levels of road services and the risk of traffic accidents is high. These three segment area are: Paro, Kulu and Geurutee mountain area. Traffic at these three road locations is often hampered and also has a high risk in terms of safety. Consider with current and future traffic condition, there is a discourse to increase the capacity of existing roads or plans for new road trace on the mountain with tunnels construction. In the feasibility study stage, there will generally be alternatives that must be selected for the best alternative. To choose the best alternative, it should be done by considering the many criteria. For this reason, this paper is the selection of the best route using the Multi Criteria Analysis (MCA) method.