bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Role of Minangkabau Prohibited Speech Act in Ujungbatu Community Environment, Rokanhulu District
Authors: Ningsih Asih Ria , Efendi Rinja , Arianti Rita 
Published: November 2020

Abstract
This research was conducted to preserve some of the oral literature one of Folklore study, namely prohibited speech act in order not to disappear in people's life and still be preserved well by the community. Especially in Minang community in Ujungbatu area of Rokan Hulu, Riau. The purpose of this study is to describe the function of the speech utterances found in Ujungbatu area. The type of this research is qualitative study by using descriptive methods. The informants of this study were three Minang people who migrated to Ujungbatu. Data is collected through observation, interview, record and data recording techniques. Based on the findings and discussion, it was found speech abstinence prohibited in Minang community in area of Ujungbatu. This study describes the functions and meanings that exist in the prohibition speech, where the category is focused on the human life cycle and the categories found consist of: (1) as a thickening of religious emotions; 2) the projected imagination a collective that comes from a person's hallucinations; 3) as an educational tool for children or adolescents; 4) reasonable explanation.
Development of Static and Kinetic Friction Coefficient Experiment Device Based on Arduino Uno
Authors: Pramudya Clara Tarania , Islami Nur , Azizahwati  , Rahmad Muhammad 
Published: November 2020

AbstractThe concept of friction makes physics more realistic. Based on research, physics education students are still experiencing misconceptions or do not understand the concept of the friction coefficient. Experimental tools commonly used in practicum have not been able to measure the coefficient of friction properly. The purpose of this research is to design a static and kinetic friction coefficient experiment that can be used in basic physics practicum. This study uses the ADDIE model which is carried out to the stage of develop or media development. The experiment was developed using the principle of sliding beams in an inclined plane by using an Arduino Uno microcontroller and sensors as a time and angle measurement device. The experiments designed to observe the effect of differences in mass and surface roughness on the friction coefficient. this device can measure the value ofμsandμksimultaneously. The time measurement precision value of the tool is 93% and the angle measurement precision is 98.0%. The experiment succeeded in proving thatμs>μk, surface roughness affects the value of the coefficient of friction and the mass does not affect the value of the coefficient of friction.
The Relationship Of Agilityagint Crescent Kick To Persaudaraan Setia Hati Athletes In Rokan Hulu Regency
Authors: Regency Tofikin , Sinurat Ridwan 
Published: November 2020

Abstract
Agility is a physical condition factor that plays an important role in improving the performance of pencak silat so it must be considered carefully. The purpose of this study was to determine whether there is a relationship between agility and sickle-kicking agility in the pencak silat athletes of the Setia Hati Terate Brotherhood in Rokan Hulu Regency. This research is a type of correlational research with a sample size of 19 people and analyzed using product moment correlation. The results showed that: There is a significant relationship between agility and the crescent-kicking agility of the Persaudaraan Setia Hati Terate athletes in Rokan Hulu Regency. With theR valuecalculated (0.523) then rx1y> Rtable, namely (0.523 > 0.456).
STEM at Home: Provide Scientific Activities for Students during the Covid-19 Pandemic
Authors: Zulirfan Z , Yennita Y , Rahmad M 
Published: November 2020

Abstract
The various barriers to learning science using online system during the Covid-19 pandemic, do not make us as a science educators, silent. One way to keep students able to carry out scientific activities is to provide scientific projects that students can work on in their own homes. The assignment can be delivered online and teachers’ feedback can also be given online using the learning management system. This study is the phase analysis of developing Module and Kits of STEM Project at Home that can be used in online science learning bay teachers and students. The results of this needs analysis phase serve as recommendations for the next stage of research. The final result of this development research is the availability of STEM at Home Project Modules and Kits that are valid and practical for students to use in learning science during the Covid-19 pandemic or New Normal era. A total of 340 respondents consisting of grade 1, 2, and 3 junior high school students in several schools in Riau Province, Indonesia, have participated in filling out the online questionnaires. This needs analysis shows that there is a great chance that STEM project-based science learning can be carried out online by students.
The Effectiveness of Learning Tools Based on Discovery Learning That Integrates 21st Century Skills to Mathematical Critical Thinking Ability in Trigonometric Materials in High School
Authors: Putri Ade , Kartini Kartini , Yuanita Putri 
Published: November 2020

AbstractThis study aims to determine the effectiveness of discovery learning based learning tools that integrate 21st-century skills in trigonometric material on the mathematical critical thinking skills of students in high school. This research is a pre-experimental study with a one-group pretest-posttest design. The tools used are the syllabus, lesson plans, and student's worksheets. The learning tools used have gone through the validation process and previous practicality tests. The effectiveness test was conducted in class XI MIPA 1 SMA Babussalam Pekanbaru. In the effectiveness test stage, the researcher gave a mathematical critical thinking ability test after completing the learning using the developed device. Indicators of mathematical critical thinking skills used are interpretation, analysis, evaluation, verification and inference. The test results show that there is an increase in each indicator of critical mathematical thinking used and the percentage of students who reach the passing grade test of mathematical critical thinking skills reaches 82.14%. So it can be concluded that the learning tools developed are effective for use. The data obtained from the critical thinking skills test results were not normally distributed based on the normality test, so to find out differences in students' critical thinking skills before and after using the device, researchers used the Mann Whitney test. Based on the results of the Mann Whitney test, it is known that the mathematical critical thinking skills of students after using the device are better than before using the device with an N-Gain value of 0.70 with a high increase category.
The Design Phase of the Development Of an Electrical Installation Prototype Kit as A Medium for The Stem Project of Junior High School Students
Authors: Yennita Y , Zulirfan Z , Fakhruddin F , Azizahwati A 
Published: November 2020

Abstract
This research is the design phase of the research on the development of an electrical installation prototype as a STEM project for junior high school students. This simple electrical installation project requires students to apply the concepts and theories about electrical circuits they have learned. In carrying out this STEM project, students integrate STEM elements, namely science, technology, engineering, and mathematics. Therefore, this research stage aims to design a prototype kit in accordance with STEM requirements and determine the tools and materials needed for these purposes. Based on the recommendations of the analysis phase that we have carried out before, in this stage of research, we have successfully built a design for an electrical installation project kits. The design of this electrical installation kits are in the form of the overall project design, supporting components, and the flow of project work by students. We have designed the kit in such a way that it becomes a mini project in a real context that allows students to directly apply the electrical circuit concept they have learned. In this kit design, STEM education elements have been integrated, namely Science, Technology, Engineering, and Mathematics.
Development of Mechanical Energy Trial Devices in Rotation Motion Based Arduino Uno Microcontroller
Authors: Sartika Medya , Azizahwati  , Yennita  , Islami Nur , Rahmad Muhammad 
Published: November 2020

Abstract
This research aims to develop tools for mechanical energy experiments on rotational motion using sensors and controlled by Arduino Uno. These objectives are motivated by the learning of mechanical energy that is often taught by teachers with the lecture method and students do not understand the concept of mechanical energy which is considered abstract. The working principle of this tool is to pass marbles on a track made of iron. This tool functions to calculate the time when a marble glides with the help of a photodiode sensor and a laser diode in order to obtain the value of translational kinetic energy, rotational kinetic energy and potential energy. This research was conducted at the Laboratory of Physics Education FKIP Riau University. The method used in this research is the Research and Development method and uses empirical test data analysis. Based on measurements of the average time obtained 0.0834 seconds and obtained an accuracy level of 0.9417 which can be categorized as very accurate. This mechanical energy experiment tool succeeded in proving mechanical energy obtained from the amount of potential energy, translational kinetic energy and rotational kinetic energy is constant.
Testing of Autonomous Onboard Device for Small Aircraft Flight Safety Improving in Central Asia countries
Authors: Aitmagambetov A , Yeryomin D , Saterov N , Zhaxygulova D , Kaliyeva R 
Published: November 2020

Abstract
This article is devoted to the issue of ensuring the safety of small aircraft flights in the airspace of the Central Asian countries. In this regard an analysis of known technical solutions has been carried out. The results of the analysis are presented in the article used as the basis for an automated system of the small aircraft flight path monitoring using global navigation satellite systems and low-Earth orbit satellite communication systems developing. This automated system aims to increase the efficiency of an organization of search and rescue efforts. One of the elements of the automated system is an onboard terminal, which is a remote technical mean installed on the aircraft. To this end during operation, the onboard terminal is vulnerable to environmental factors. So, this article discusses the developed methodology and results of conducted experiments on checking the execution of the functions and resistance to external climatic and mechanical influences.
Evaluating Cost-Effective Culture Media for Nutraceutics Production from Microalgae Using Computer-Aided Large Scale Predictions
Authors: Ibanez A , Rolon Y , Gelves G 
Published: November 2020

Abstract
The purpose of this research consist of microalgae biomass productivity prediction in a large scale plant from Chlorella vulgaris using SuperPro Designer software. Two culture media were evaluated to identify their potential use in large-scale processes: (a) the Bold Basal medium enriched with sodium acetate and (b) a growth medium for high cell density cultures proposed from references. Results found in this research suggest that simulated plant should reach a capacity to generate 1.4 kg/h of biomass at a cost of 1.44 USD/g using Bold Basal medium. In contrast, a productivity of 28 kg/h at a cost of 0.14 USD/g was found using a medium proliferation of highly dense microalgae cultures. These findings suggest that Bold Basal medium could negatively impact operating costs, limiting its use in large-scale processes regarding nutraceutics production. Results found here demonstrate the potential usage of simulators for estimating costs and production which allows predicting the bioprocess feasibility.
In-Ground Decay Modeling of Historic Timber Foundations of Sultanate Mosque in Sambas, Indonesia
Authors: Wibawa Uray Alif , Prabowo Herry , Fitriyanto Ari 
Published: November 2020

Abstract
Timber is a construction material easily degraded when exposed to the weather without any particular treatment. The deterioration risk of timber structures increases over time. The historic buildings suffer the most severe deterioration after exposed to hundreds of years. The demand for preserving the heritage building as a legacy from the past is increasing nowadays. Thus, it is essential to know the building’s residual service life to determine the proper measures at the right time. It is required to decide when the responsible party should do a replacement or repair action on the main building elements. The simulation of decay depth on the Sambas Sultanate Palace showed that the timber foundations had not faced severe deterioration problems. The occurring decay depth is 25.940 mm (in 135 years), and the initiation of decay occurred in 22 years after the mosque was built. It has not reached the center of the foundation cross-section yet. Thus, it is concluded that the building is in excellent stability and safety condition.
Threshold Determination in Multislice CT-SCan using Improved Marching Cube Algorithm (IMCA) for 3D Image Reconstruction Process (3D-IRP)
Authors: Purnama I L I , Tontowi A E , Herianto  
Published: November 2020

Abstract
Medical diagnostic information has been a change in clinical medicine development, including medical image and computer technology. The paper aims to determine the threshold for the 3D-IRP with a multislice Computerized Tomography Scan (CT-Scan). The 3D-IRP method is the IMCA technique. Skull and Sternum are the focus of the 3D medical image. It is in the multislice CT-Scan format of Digital Imaging and Communications in Medicine (DICOM). Surface volume and area, and visual shape are performance criteria of the 3D-IRP are matching with a software package (InVesalius ver. 3.1). The optimum threshold for the 3D bone representation of objects is 210. The difference in 3D image surface area and volume between the prototype's performance and the software package is smaller than 0.50%. Based on the three radiologists, the Skull and Sternum's visual shape is roughly 100% balanced.
Use of Operational Training Simulation in the Study of Ethanol Operating Conditions: A Powerful Tool for Education and Research Performance Improvement
Authors: Alvarado K , Bayona J , Consuegra J , Parada D , Sepúlveda N , Gelves G 
Published: November 2020

Abstract
Currently, virtual education has reached a significant boom in higher education institutions. The latter, considering health emergency due to coronavirus pandemic, which makes it difficult to re-open physical infrastructures. As a consequence of the above, there is concern about experimental development taught by higher education and research institutions, since the execution of the experimental component is still considered a challenge due to uncertainly of on-going infections. Currently, the University of Bremen, Germany has implemented an operational training simulator for the study of bioprocess based on mathematical equations and experimental confirmations. The software enables teaching of virtual handling and operation of bioreactors. Students and engineers can deal with real situations that arise in the plant operation. Fermentations in different modes to reflect its effects on productivity could be studied. The main purpose of this research is determining the best operating conditions for the ethanol continuous production using the BioProcess Trainer software. One of the most important findings suggest a bioreactor feed rate of 5 mL/min charged with 20 g/L of glucose to reach a productivity of 0.037 g/L.h. Results found here demonstrates the Bioprocess Trainer potential capacity not only in the study of industrial plant operating conditions but also regarding educational institutions since mentioned tool improves engineers’ expertise.
Evaluating Road Networks Performance: Capacity Restraint Method
Authors: Rahman Aulia , Irawan Muhammad Zudhy 
Published: November 2020

Abstract
Traffic condition in Yogyakarta City faces growing volume each year. Meanwhile, the development of road is increasingly harder to expand due to limited availability of lands and funds. Therefore, evaluation of road networks is needed to avoid, reduce and eliminate traffic congestion in Yogyakarta. In this study, the authors aim to build road network model representing traffic condition in Yogykarta. Capacity restraint method is used for traffic assignment with the assistance of ZIN software. ZIN capability to model complex road networks is also assessed.
Economic Assessment of Itaconic Acid Production from Aspergillus Terreus using Superpro Designer
Authors: Nieto L , Rivera C , Gelves G 
Published: November 2020

AbstractItaconic acid is a metabolite produced from biotechnological pathway using the microorganismAspergillus terreus.It is used in a wide number of sectors such as industry, agriculture and health. Based on its chemical properties, itaconic acid is a great interest for replacing polymers and resins derived from petroleum. However, its production is still expensive and this latter hinders large scale studies regarding itaconic acid production. Nowadays, simulation is a great alternative to overcome this problem. It allows researchers to make a more effective evaluation and self-assessment, reducing costs and avoiding losses at large scale operation. For that reason, the purpose of this research is performing an Itaconic acid production simulation on industrial scale using SuperPro Designer software. Costs reduction improvement is also analyzed. 90g/L of glycerol, 1g/L of NH4NO3and 1.25 of KH2PO4 are set up on simulation as media composition reported from references. Results regarding itaconic acid crystals showed a productivity of 171 kg/h and an operating cost closed to 42.0 USD/kg. Interestingly, a 17 % productivity increase is reached by proposing a stream recycling based on itaconic acid recovering from downstream centrifugation processing. The latter based on a higher productivity estimated (200 kg/h). Also average costs are reduced at 12 % since 38.1 USD/kg is found using improvements mentioned. Results found here demonstrate the potential usage of simulators for estimating costs and production which allows predicting the bioprocess feasibility.
Analizing Elementary School Teacher’s Understanding (ESTU) in Scientific Communication skills (SCs)
Authors: Hermita N , Alim J A , Mulyani E A , Putra R A , Alpusari M , Fauza N , Sari I K , Chairilsyah D , Rayendra R , Anggoro S 
Published: November 2020

AbstractThe purpose of this research is to analyse the understanding of science communication on elementary school teacher. This research method is descriptive quantitative. The research subjects are 30 elementary school teachers from 6 elementary schools FKIP Riau University Partners. The results showed that the understanding of elementary school teachers about science communication on the aspect of predicting 12 teachers are in the very good category, on the aspect of questioning 18 teachers are in the very good category, and in the aspect of presentations 10 teachers are in the very good category. Based on these results, it can be concluded that the SCs skills of teachers are already in the very good category.
Naive Bayes Method for Classification of Student Interest Based on Website Accessed
Authors: Nazir Alwis , Akhyar Amany , Ramadhani Muhammad , Herlina  
Published: November 2020

AbstractInterest is a feeling of liking a thing or activity without any coercion. Students' interest in a certain subject will maintain students' learning abilities, thus they could master it and get good learning outcomes. Interest can be known from the website accessed. The aim of this study is to build a web-based application that could classify student interest using Naïve Bayes based on the website accessed. In this study, the data used are 17.265 student internet history data. The application was tested using Black Box and the method was tested using Confusion Matrix. The result from the application testing met the expectation, and the method (Naïve Bayes) reached 99,81% accuracy using 70:30 data percentage. The top five classes obtained are Social Networking, Educational Institution, Streaming Video, Search Engines, and Web-Based Mail. The “Develop” class was also found, thus the study group related to application development is recommended to be formed.
The Synthesis of Biodiesel from Crude Palm Oil (CPO) using CaO Heterogeneous Catalyst Impregnated H2SO4,Variation of Stirring Speed and Mole Ratio of Oil to Methanol
Authors: Nurhayati  , Amri Tengku Ariful , Annisa Nurul Fitri , Syafitri Febria 
Published: November 2020

Abstract
Biodiesel is a diesel engine fuel produced from renewable material and contains fatty acid alkyl ester from triglyceride or oils through transesterification reactions with short chain alcohols and catalysts. In this study biodiesel was synthesized using crude palm oil (CPO) using CaO catalyst from blood cockle shells calcined at 900 °C for 5 hours and impregnated with H2SO4 (1,2 and 3M). The catalyst was characterized by XRD and XRF. The biodiesel was synthesized with variation of stirring speed (300, 400, 500, 600 rpm) and mole ratio of oil to methanol (1:6, 1:9, 1:12, 1:15 and 1:18. The maximum biodiesel results obtained on a H2SO4 (3M)/CaO catalyst with a stirring speed of 500 rpm and mole ratio of oil to methanol was 1:12 at the transesterification reaction stage and using a CaO catalyst calcined at 900 °C for 5 hours produced a yield of 96.69%. The characteristics of biodiesel produced was water content 0.05%, specific gravity 890 kg/m3, viscosity 4.46 mm2s−1, carbon residue 0.05% and acid number 0.5 mg KOH g−1. It can be concluded biodiesel, meets the quality requirements of SNI 7182-2015
Hyposensitivity test of Lactobacillus fermentum InaCC B1295 probiotic bacteria on the growth of mustard greens (Brassica junceae L.)
Authors: Yunaira R. , Zulfarina  , Pato U. 
Published: November 2020

Abstract
The purpose of this study was to (1) determine whether the probiotic bacteria Lactobacillus fermentum InaCC B1295 were able to adapt (compatible) to mustard greens (Brassica junceae L.). (2) Knowing the effect of the probiotic bacteria Lactobacillus fermentum InaCC B1295 on the growth of mustard greens (3) Obtain the best concentration for the growth of mustard greens. This was an experimental study and used a completely randomized design (CRD) with 4 treatments and 4 replications to obtain 16 experimental units. The data were analysed using SPSS version 9.1.3 and ANOVA, then followed by Duncan's New Multiple Range Test (DNMRT) at 5% level. The results showed that the application of the probiotic Lactobacillus fermentum InaCC B1295 was significantly different from the control. So it can be concluded that the probiotic bacteria Lactobacillus fermentum InaCC B1295 are able to adapt their life (compatible) to mustard plants, and have a positive effect on the growth of mustard greens. The 105 CFU/mL dilution is a good treatment to stimulate the growth of mustard plants.