bluuebunny/crossref_metadata_2025_split huggingface dataset:
Digital Geoshapes Learning Media In Supporting Mathematics Education II PGSD
Authors: Hariyono Mohamad , Widhi Ernayanti Nur , Ulia Nuhyal 
Published: February 2021

Abstract
Mathematics education course II requires learning media as motivation that can increase student interest and understanding. It takes learning media that is innovative, interactive, and follows the development of information technology. Digital Geoshapes learning media as an alternative media in supporting Geometry material and the area of mathematics education subject II. The purpose of developing Digital Geoshapes learning media is to describe the stages of development of Digital Geoshapes learning media in Mathematics II courses and to describe the effectiveness and practicality of learning with Digital Geoshapes media in Mathematics Education II courses. This type of research is development research. As for what was developed was Digital Geoshapes learning media. Development of Digital Geoshapes learning media refers to the modified general education development model of Plomp, that is, without including the implementation phase after the test, evaluation, and revision phases are completed. The stages consist of the initial investigation stage, the design stage (design), the realization stage (construction) and the test, evaluation, and revision stages. Research variables include the validity of the material, the validity of Digital Geoshapes learning media, student interest, and evaluation tests. Data analysis techniques include validation of Geoshapes Digital media data analysis, tutor response questionnaire analysis, analysis of student interest, and objective tests. From the results of the study it was found that the validity test of Geoshapes Digital media reached a score of 4.29 with valid criteria, while the results of the tutor response questionnaire analysis obtained a score of 4.32 with very good criteria, and analysis of student interest reached 4.51 criteria of very good, learning by median Digital Geoshapes can also improve student understanding as indicated by the average evaluation test score reaching 88. Thus the Geoshapes Digital learning media already fulfills valid, practical and effective criteria.
Assessing didactic mathematical knowledge for teaching geometry transformation
Authors: Nurdiana A , Tanod M J , Adirakasiwi A G 
Published: February 2021

AbstractThe purpose of this study is to assess the pre-service teacher’s mathematical knowledge for teaching geometry transformation material. Teacher content knowledge is a critical focus of educational research in light of the potential impact of teacher knowledge on process teaching and learning. There are learning obstacles for students in learning mathematics including ontogenic obstacles, epistemological obstacles, and didactic obstacles. This research is qualitative research with a hermeneutic phenomenology approach. That is used to find out more deeply about the phenomena. The results of the study revealed that pre-service mathematics teachers rely on their past experiences as math students and also their work experience compiling a learning obstacle. The next result shows that the level of knowledge of transformation geometry content is still low, this can hinder the teaching process of the subjects. the last concluded pre-service teacher mathematics need developing the required professional knowledge and skills requires to exercise analyzing the learning obstacle continuity
IbisPaint X Apps in Creating Collaborative 3D Learning media of Pop-Up and Movable Books
Authors: Hasanudin C , Mayasari N , Saddhono K , Prabowo R A 
Published: February 2021

Abstract
The IbisPaint X Apps was an application with a concept of “share the fun of drawing” that had a function to draw many detailed designs. This study aimed to investigate how was the role of IbisPaint X Apps in supporting the process of creating collaborative 3D learning media of pop-up and movable book. This study was a library research. The procedures of study were used the theory of Mary W. George that implemented nine stages. The sources of data were taken from national and international journals, Indonesian and foreign textbooks. The results of study showed that IbisPaint X Apps could be used in creating collaborative 3D learning media of pop-up and movable books because it had complete features and could create good and detailed pictures. This collaboration created a 3D learning media that was more interesting, unique, and had two working mechanisms.
Android-Based Learning Environment To Enhance Creative Thinking Mathematics and Self-Efficacy
Authors: Amalia R , Zaiyar M , Fadilah F , Santoso E 
Published: February 2021

Abstract
The ability to think mathematics and self-efficacy is a combination of skills needed to face a bright future. But the present conditions force the learning process to take place online which is caused by the spread of the pandemic COVID 19. The innovation of the learning process as a result of technological transformation enables innovation based on Android learning. The purpose of this study is to impact the Android-based pursuit of mathematical creative thinking skills. This research is pre-experimental research with one-group pretest-posttest design. The research sample is junior high school students in Aceh Province. The sampling technique used was purposive sampling to get samples with equal ability. The instruments in this study were tests of mathematical creative thinking ability and self-efficacy scale. Test analysis using paired sample t-test with one way ANOVA test. The results of the study, in general, prove that android-based learning has a positive impact on students’ mathematical creative thinking abilities and self-efficacy has a positive impact on mathematics creative thinking abilities.
Project-based learning with LMS moodle to promote mathematical problem solving and self-regulated learning
Authors: Kusuma J W , Hamidah  , Mahuda I , Sukandar R S , Santoso E , Jatisunda M G 
Published: February 2021

Abstract
The ability to solve mathematical problems and self-regulated learning is one of the important abilities mastered by students in learning mathematics. However, activities in classroom learning are still direct teaching, which results in a low increase in these abilities. So it takes alternative learning centered on students. This study was conducted to determine the impact of project based learning on mathematical problem solving abilities and self-regulated learning. Quasi-experimental design with three class groups was used: Pretest-posttest Control Group Design. Based on the results of statistical analysis inference the mathematical problem solving ability of experimental class students is better compared to the control class as well as the self efficacy of the experimental class better than the control class. Project based learning with LMS Moodle has a positive impact on improving problem solving skills and self-regulated learning.
Using Online-Game Based Platform to Improve Students Mandarin Skills
Authors: Ying Y , Yulius  , Juniarto A 
Published: February 2021

Abstract
Nowadays, many Chinese learning games can be played online and offline. Games are easily found in cell phones, PCs and consoles. There are also many types of games such as: Role Playing Game (RPG), First Person Shooter (FPS), Action Games, etc. Other than those mentioned, researchers want to tell only a few types of games. Game-Based Learning can control in three important parts of learning, namely Emotional, Intelligence, and Psychological. This study aims to determine the views of students in grades 3 and 4 elementary school if using the Game Application Learning Method (Game Based Learning) in learning Mandarin in class. In addition, researchers also want to know the game models that are expected by students in grades 3 and 4 in elementary school to help learning Mandarin. From the students input, it was concluded that the students found it helpful to learn Mandarin with the help of games. In addition, they hope that the game designed contains teaching material that can help learning to listening, speaking, reading and writing.
Using Technology-Flashcard to Encourage Students Learning Mandarin
Authors: Ying Y , Marchelline D , Wijaya G 
Published: February 2021

Abstract
The use of learning media in learning Mandarin is very diverse. One of the media used is online-flash card. The objectives of this study are (1) to find out the increase of students interest in learning Mandarin; (2) to determine the ability to master Mandarin vocabulary through a technology flashcard, and (3) to find out the improvement in writing Mandarin characters. This research uses descriptive analytical qualitative method in which the researcher distributes questionnaires and conducts experiments on the use of online-flashcards to elementary school students in Pelita Kasih elementary school. The data obtained comes from the results of the questionnaire and the comparison of values before and after learning by using a flashcard. Based on the analysis of the data obtained by researchers, it can be concluded that the 5th grade students of Pelita Kasih SDS like learning Mandarin by using a flashcard. Through learning with flash cards, the Mandarin scores of 5th grade students at Pelita Kasih SDS have increased. In addition, the students vocabulary mastery also increased. Thus grade 5 elementary school students can learn vocabulary using technology flash card.
4Cs Analysis of 21st Century Skills-Based School Areas
Authors: Khoiri Ahmad , Evalina  , Komariah Nur , Utami Rahayu Tri , Paramarta Vip , Siswandi  , Janudin  , Sunarsi Denok 
Published: February 2021

Abstract
The study aimed to analyze 4Cs (Critical thinking, Creativity, Communication, and Collaboration) 21st Century Skills which were based on the student’s school environment different from concepts of science. Types of quantitative research with data collection methods in the form of observations, tests, questionnaires, and documentation. Based on comparative t-test analysis results in significant no differences in critical thinking (C1), that creativity (C2) and Communication (C3) highers than middle and rural areas, while teamwork and collaboration (C4) Rural area students are higher than the urban and middle area. This shows the culture of the surrounding environment that affects students’ 4c skills. Interestingly, the lifestyle patterns of the Rural Area and Urban Area greatly affect student collaboration in the learning process. the habit of mutual assistance, scolding greetings, and getting to know each other is more entrenched in the Rural Area.
Virulence of Entomopathogenic Fungi Isolates against Green Ladybug Nezara viridula L. (Hemiptera: Pentatomidae) Eggs
Authors: Permadi Muhammad Agung , Lubis Rafiqah Amanda , Mukhlis  , Harahap Qorry Hilmiyah , Siregar Ulfa Sari 
Published: February 2021

Abstract
Green Ladybug Nezara viridula L. spread in tropical and subtropical regions such as in America, Africa, Asia, Australia, and Europe. Imago N. viridula or nymphs attack the legume plants in the generative phase by piercing and sucking pods. So far, farmers are still using control technology in the form of chemical insecticide applications. Chemical insecticides are only able to kill the nymph and imago stages. Meanwhile, the egg stage is still able to survive and continue to grow because there are still a few chemical insecticide compounds that can thwart the hatching of eggs. Entomopathogenic fungi are one of the potential biological control agents for controlling N. viridula eggs. Because entomopathogenic fungi can infect all insect stages of eggs, nymphs or larvae as well as imago. This research was conducted using a Completely Randomized Design (CRD), with three replications and nine treatments (control, B. bassiana, M. anisopliae, and fungi isolates of Metarhizium sp., such as MetTmM, MetTrM, MetKM, MetKpP, MetKP, MetTrP). The results showed that the lowest percentage of eggs hatched due to MetTrP isolate reached 0%, but not significantly different from B. bassiana (10%) and MetKP isolate (11.67%). The highest percentage of hatched eggs was caused by MetTmM isolate which was 63.33% with the same conidia density which was 108 conidia/ml. All fungi isolate tested could infect N. viridula eggs.
Numerical Study on Behaviour of Spiral Concrete Columns and Slender Concrete Filled Steel Tube (CFST) Columns against Concentric Axial Loads
Authors: Wijaya Usman , Sanjaya William 
Published: February 2021

Abstract
Concrete columns with a circular cross-section have been used since a long time ago due to its better performance and advantages in many ways. The value of axial force in circular column is greater than in square column under the equivalent condition. To date, there has been no study that compares CFST behaviour with spiral concrete columns. This study can fill the gaps in comparative studies in between performance of the two types of columns with axial loading on slenderness variations using finite element modelling. Based on the results of the finite element modelling, with the same material capacity the CFST column has a greater resistance to geometric or bending failure with 8.63% than the spiral concrete column. The CFST column has a larger Critical Buckling Load than the spiral. And in general, with the greater the value of L/D or the slenderer the column is designed, the value of the Critical Buckling Load will tend to decrease and this occurs in both types of columns.
Evaluation of Total Armada Transport City Route 05B in Cianjur City
Authors: Setiawan Devi 
Published: February 2021

Abstract
The transportation problem is a classic problem that occurs in almost every city in Indonesia, including the city of Cianjur which is located in the province of West Java. One focus of transportation problems in the city of Cianjur is about the number of Cianjur city transportation that is too much operating but not balanced with the number of passengers served. This condition causes the city transportation drivers to fight over passengers to catch up with deposits. The method of conducting the research was carried out by a dynamic survey, carried out in a vehicle by the method of recording the number of passengers who boarded and alighted vehicles traveling on a route, where the officer recorded the number of passengers who boarded and descended and or travel time in each segment. After analyzing, the loading factor value for rush hour and rush hour turns out to be under 50%. The average number of fleets 05B needed to be based on circulation time (K) at morning rush hour 1 unit vehicle/hour, rush hour afternoon 2 units vehicles/hour, and during the afternoon no rush hour 1 unit of vehicle/hour. While the number of trips (fleet trips) needed in the busy period and non-busy time (K ’) in the morning rush hour 2 vehicle trips (trip) / hour, rush hour noon 2 Vehicle trip (trip) / hour and at no-rush hour afternoon 2 Vehicle trip (trip) / hour.
Design and Development of Student Activity Record Systems Using the Concept of Reactive Streams in Data Stream Processing
Authors: Safitri Aila Gema , Chandra Denny , Hutabarat Mervin Tangguar 
Published: February 2021

Abstract
Student Activity Record System is an elearning module that is used to record student activities in the context of behaviour assessment. Student and teacher sent datas in the form of photos, videos, texts and geolocation coordinates. With the number of requests sent by the user, the load from the server side will continue to gain weight. It requires an efficient way to use the resources on the server side, namely Central Processing Unit and memory. The using of Netty as an asynchronous event driven web server and the reactor libraries as a reactive streams implementation on the server side become the right choice to optimize Central Processing Unit and memory usage. This research emphasizes the design of system architecture and library selection that implements the concept of reactive streams on the client-server side. The reactive streams concept is applied to web dashboard and mobile application so that web and mobile application become more responsive because execution is asynchronous.
Android Based Information System of Indekos Booking and Rentation Locations in Cianjur District
Authors: Abdulghani Tarmin , Jaelani Lalan , Sidik Japar 
Published: February 2021

Abstract
Cianjur regency has a very wide area with a travel time of up to 7 hours to the city of Cianjur form the southern area. The city of Cianjur is one of the tourist destinations and the place of education especially for citizens come from this area. During the vacation or study, they stay in Cianjur for several days. It can be long or short stay. Due to the unpredicted amount of time to stay, travelers or the sholars need to find out a temporary shelter quickly and easily. Mobile-based information technology is one of the easiest ways to provide solutions to help finding a temporary housing in Cianjur. This application provides information of the location, facilities, and prices of boarding houses. As they find the suitable criteria of the house they can order and pay directly to occupy the boarding house.
Analysis of Unsignalized Intersection Using PKJI 2014 Method (Study Case: Intersection of Jalan Sukajadi - Jalan Sukawangi-Jalan Sindang Sirna, Bandung)
Authors: Fadriani Hetty , Hidayat Iman , Adinda N.R , Haris Samun , Mahardika Andrew Ghea , Nuryono Budi 
Published: February 2021

Abstract
Unsignalized intersection between Jalan Sukajadi, Jalan Sukawangi, Jalan Sindang Sirna is a strategic intersection in Bandung as the main access to the North Bandung area (Ledeng and surrounding areas). The intersection is often congested, especially at peak hours. This research tried to find a solution by exercising two scenarios, i.e. scenario (1) eliminating the main conflict and scenario (2) applying Traffic Signal (APILL). Analysis conducted using the Indonesian Road Capacity Guidelines (PKJI 2014) to the traffic data collected in peak hours of three workdays, i.e. morning peak, noon peak, and afternoon peak at December 2018. The existing condition shows the degree of saturation (DJ) value of 1.31, delay (T) about 153.93 sec/pcu, a potency of queuing (PA) about 70.71 to 46.7%, and level of service at F. Scenario (1) gives a DJ value smaller than the existing condition, T remains, PA becomes bigger and the level of service still in F. Scenario (2) results in a DJ value below 0.85, T and PA gets smaller, and service level increased to level C. In accordance to the simulation results, it recommended to apply traffic signal (APILL) on the intersection to relieve the congestion.
3 Phase Inverter Switching Algorithm for Industrial Needs
Authors: Syafruddin R , Nataliana D , Hidayat R , Anung  , Mahardika A G , Ramady G D 
Published: February 2021

Abstract
3 phase inverter is needed, besides to change the dc to ac voltage as needed, in the industry every CNC or NC machine needs an inverter to regulate the rotation speed of the motor, constant motor rotation requires for cutting in certain a variety of speeds feeding processes, wherein conventional machines gear is used to change the rotation speed of the motor, here the AC voltage is changed to DC and returned to AC according to the required frequency. For this reason, the researchers tried to research switching the 3 phase inverter algorithm with the principle of space vector pulse wide modulation. Here the switching theory follows the SVPWM switching rule, where the resultant vector is the result of each sector of each phase. The microcontroller accepts the input data, that will be used to generate frequency, the required PWM calculation, the sector, estimates the switching process per sector, the switching sector according to the algorithm results rule. These results will generate inter-phase voltage greater than conventional switching methods, reducing noise, switching steps shorter only 6 steps, improve the power factor. The switching algorithm is ready to be used to make 3 phase inverters.
Implementation of Back Propagation Artificial Neural Network for Heart Disease Abnormality Diagnosis
Authors: Rosa Susila Jaya Kuncara , Afit Muhammad , Laksono Pujo 
Published: February 2021

Abstract
Heart is a very important human organ, where in normal people heart beats at 60-100 beats per second, but there are abnormalities in the heart rate that can occur due to certain causes so that it becomes slower (bradycardia) or faster (tachycardia). Electrical activity of the heart can be detected by an electrocardiogram
(ECG), where the output of this device is a signal that describes the condition of a person’s heart. Artificial neural network (ANN) is one of the learning methods of artificial intelligence that can be used for pattern recognition or the other. One of the ANN learning paradigms is backpropagation where the computation goes through 2 stages, namely advanced calculation and backward calculation. This study aims to simulate backpropagation neural networks to recognize patterns from the output of the electrocardiogram using the MATLAB program. The input is form of printed electrocardiogram recording, and then it is normalized, next the data is processed by backpropagation computing with two phases (training phase and testing phase). The output of this ANN is a description of a patient’s condition whether normal, bradycardia or tachycardia.
Analysis of Water Resources in Irrigation Channels as Kinetic Energy Sources
Authors: Simanjuntak Mangambit Juliandar , Siahaan Yakub , Trimo Didik , Andrew GM , Sardjoe Darmono , Sujana Ahmad 
Published: February 2021

Abstract
Water resources can be utilized for various human needs including household needs, industrial needs, irrigation needs for agriculture as well as potential energy and kinetic energy for electricity generation. Sindupraja Primary / Primary Channels, which are the main canals serving irrigated areas covering 87,803 ha spread across Cirebon Regency and Indramayu Regency, with a water discharge of 10.3 m3 / sec and good discharge capacity and the large dimensions of the channel make it more optimal not to use only as a provider of irigas for agriculture but also as a potential and kinetic energy source for electricity generation. The purpose of this study was to determine the water resources in terms of hydraulics contained in irrigation channels, especially the Sindupraja Main Canal, which can be optimized as a source of kinetic energy. The purpose of irrigation is the use of water that is comprehensive and supports agricultural productivity in order to increase agricultural production, besides optimizing the management of irrigation water resources because there is stored energy namely potential energy (in falling water) and kinetic energy (in running water), where This energy can be used as the main medium to drive turbines and generators as a source of electrical energy. The amount of potential and kinetic energy produced from these water resources depends on the amount of water debit available, the speed of flowing water flow, and the consistency of water discharge in a certain size. Utilizing the potential of water resources contained in irrigation canals, water energy can be used as a source of MHP where kinetic energy contained in the flow of water in irrigation canals is used as a driver of waterwheels, where the waterwheel is used as a medium or means to convert water energy into energy mechanical form of torque on the wheel shaft to produce electrical energy. the amount of power produced depends on the water flow and speed of the water flow.