bluuebunny/crossref_metadata_2025_split huggingface dataset:
Crosslinking Density Characteristics of a Nanocomposite Elastomer
Authors: Habib N. A. , Jabbar Ahmed S , Hassan F. L. , Intan N. I. 
Published: March 2021

Abstract
Nanocomposites elastomers are being developed in the field of nanomaterials as it has low weight and high properties compared to the conventional rubbers. Acrylonitrile butadiene rubber (NBR) is used in automobile parts due to its ability to resist oil. In this research, Carbon Black nanoparticles (CBnp) type FEF N550 was used to reinforce this rubber to reduce the swelling ratio. Therefore, physicochemical characteristics were investigated for five different samples of vulcanized CBnp/NBR nanocomposites with 0, 0.2, 0.6, 1.2 and 2.4 phr of CBnp using the solution mixing method. The homogeneity of these nanocomposites was evaluated by Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). Furthermore, the influence of different contents of CBnp on the tensile strength was analyzed. The results showed that the crosslinking densities in the CBnp/NBR nanocomposites structure have been improved compared with the neat vulcanized NBR and the mechanical properties as well. t’s an essential result which can employ it to prepare washers (rubber rings) resist against oils for several applications.
The development of prepaid water meters based on AT89S52 Microcontroller
Authors: Nurhayata I G , Sutaya I W , Ariawan K U 
Published: March 2021

Abstract
A prepaid water meter is a device for controlling the volume of customer water usage with a water pulse system. Currently, the prepaid water meter implements a card system as a storage area for customer water pulse data by filling it via a keypad. This research aimed to develop a prepaid digital water meter using EEPROM memory as a storage area for customers’ water pulses by filling it with a remote control based on the AT89S52 microcontroller. The research method is carried out by developing hardware and software, as well as testing the overall system performance. The results showed that the prepaid water meter system worked well to control the work of the solenoid valve in adjusting the volume of water consumption according to the number of water pulses in the EEPROM memory. Also, the system worked well in the process of recharging water pulses on prepaid water meters via remote control.
The use of iot technology based on the forward chaining method to monitor the feasibility of rice field
Authors: Sastrawan I G P , Gunadi I G A , Ernanda K Y 
Published: March 2021

Abstract
This study is aimed to implement a system based on the forward chaining algorithm to provide real-time information on irrigation and soil feasibility. There are three aspects studied, namely, water level, soil moisture, and temperature. The system developed uses an ultrasonic sensor as a water level detector, a soil moisture sensor as a soil moisture detector, and a DS18B20 sensor for measuring temperature. This system uses the ISP8266 module NodeMCU microcontroller as a Wi-Fi module and uses a solar cell to utilize the sun as an environmentally friendly power supply. Two tests were carried out, including laboratory testing and field testing. Laboratory testing shows that the system works with an accuracy of 57%. Tests were carried out on the three aspects studied. Meanwhile, field testing shows that some of the rice fields in Cekik Hamlet are not yet suitable for processing based on land feasibility. There are 8 paddy fields with an average area of 25 square meters, and they are named rice fields B, C, D, E, F, G, H, and I. The test results showed that the lands suitable for work are rice field B and rice field E. The feasibility value is measured based on water availability above 3 cm, wet soil moisture with a value of 300 or below 300, and a temperature below 25 degrees Celsius. Validation was obtained from farmers, the head of rice field irrigation (Prajuru Subak), and agricultural extension workers. It can be concluded that the system developed has been able to provide information on irrigation or water availability and the feasibility of cultivating the land in real-time.
Analysis of jejak bali virtual class using usability testing, including concurrent think aloud techniques and performance measurement techniques
Authors: Jaya M P , Dantes G R , Candiasa M 
Published: March 2021

Abstract
Jejak Bali is a website created specifically by PUSTEKKOM to manage learning activities so Bali Provincial Education Office can carry out supervision and guidance for e-learning in Bali. Many obstacles were experienced by teachers and students when using Jejak Bali. It encouraged the design of a study looking at the usability of a system from a user perspective to increase user satisfaction. The methods used were usability testing technique, Concurrent Think Aloud, and Performance Measurement which measured the effectiveness, efficiency, and user satisfaction. The population of this study were teachers and students from SMAN 2 and SMKN 3 Denpasar. In measuring Performance Measurement and CTA, the sample used consisted of 40 participants including teachers and students as well as 86 users who used the questionnaire SUS. The results of the research were: (1) Jejak Bali, for teacher and student users, was still ineffective because there were still errors made while doing the assigned assignments, (2) Jejak Bali which was seen from the time when teacher and student users were working was still inefficient because of the differences of the significant time from the advanced group to the beginners, (3) Jejak Bali still did not meet user satisfaction as seen from the results of the SUS questionnaire recapitulation in which a teacher scored 49.0 and a student scored 48.3. Because the value obtained was below 60 in the percentile rank, so it can be concluded that Jejak Bali still did not meet usability good as seen from the results obtained.
User experience evaluation of academic progress information systems using retrospective think aloud and user experience questionnaire
Authors: Gunawan I M A O , Indrawan G , Sariyasa  
Published: March 2021

Abstract
SIsKA-NG is the result of advanced development of the thesis management information system at the Computer Science Study Program, Universitas Pendidikan Ganesha. Usability evaluation needs to validate development results based on user requirements. This research aimed to identify problems and user satisfaction when using SIsKA-NG with student access. This research used Retrospective Think Aloud in specifying difficulties or user suggestions and User Experience Questionnaires to obtain user satisfaction scores. An evaluation was carried out on 20 respondents who were selected using simple random sampling from 139 active SIsKA-NG users. Retrospective Think Aloud produced 4 recommendations for improvement of SIsKA-NG. User satisfaction analysis showed that all aspects of the user experience were in the excellent category. The average score for each aspect was as follows: attractiveness aspect was 2,23; perspicuity aspect was 2,30; efficiency aspect was 2,49; dependability aspect was 2,55; stimulation aspect was 2,30; and novelty aspect was 2,35. Future research will focus on the evaluation of SIsKA-NG in all other study programs at Postgraduate program in Universitas Pendidikan Ganesha.
Rindik rod sound separation with spectral subtraction method
Authors: Christian Y , Darmawan I D M B A 
Published: March 2021

Abstract

Rindik is a traditional music instrument originated from Bali that consists of 11 bamboo rods and played by a person hitting the bamboo rod with a rubber mallet in each player’s hands. Documentation of Rindik songs with automatic music transcription work is easier to do by separating it first. To overcome that challenge, two Rindik rods sound were separated using the spectral subtraction method. The noise spectrum is the spectrum of a single rod sound that needs to be muffled. The resulting audio is the other single rod sound and vice versa to get both single rod sound. The data consisted of single rod hit sound recordings of 11 single rod sound and 55 combinations of two-rods sounds being hit at the same time. The performance of the spectral subtraction method in separating Rindik sound was measured with MSE and SIR and also heard the noise exists in the separated audio signal. The experiment demonstrated a state-of-the-art performance consists of spectral subtraction with squared noise average magnitude with average MSE value 0.0126 and average SIR value 55.68 dB.
Usability testing and the social analysis on online counselling system for recommendations in technical vocational schools
Authors: Pageh I M , Permana A A J , Suranata K 
Published: March 2021

Abstract
With the great numbers of vocational schools in Indonesia, there should be plenty of jobs available and to decrease the number of unemployment. The purpose of this research was to help schools to assist students in choosing major courses that suit their skills and interests so the students could feel motivated to participate in the learning process and in the end, they could understand the lesson well. Placement test was carried out to determine the prior knowledge of new students so that they could easily be directed to the appropriate courses. The results of the test were analyzed as a basis to conduct counselling to students. This research was developed by using the R&D method and the final product was in the form of a computer application. This application was tested at SMKN Bali Mandara. The results showed that the application can help students to choose major courses that fit their interests, and have counselling based on the results of the test. It needs to be tested again regarding its usability by using the System Usability Scale (SUS) to measure the level of user satisfaction. The test results in the range of 66,125, this means it is good.
Educational big data infrastructure: opportunities, design and challenges
Authors: Putrama I M , Pradnyana G A , Paramartha A A G Y , Darmawiguna I G M , Wirawan I M A , Pascima I B N , Wijaya I N S W , Aryanto K Y E 
Published: March 2021

AbstractThe importance of data to help the management of educational institutions in decision making is recognized by all parties to improve the quality and competitiveness of their alumnus in society. However, to process aBig Data, facilities and resource capabilities are needed to convert the data into information that can be easily visualized and consumed by various interested parties. As the inefficiency of the old technology use in helping the businesses’ needs, the infrastructure of the big data is important. Big data presents various challenges in infrastructure provision and resource constraints as well as privacy and security concerns. This paper provides an initial development of how to build Big Data infrastructure in an educational institution that is adaptable to existing conditions which provide considerable performance and capabilities to perform information mining to assist in decision making. The scenarios, in this case, provide valuable additional insights for organizations to apply to their environment and can be leveraged to reach critical decision making through data visualization.
Designing the balinese script-to-speech synthesis system using noto serif balinese font
Authors: Setiawan M H , Aditya M W , Loekito L H , Indrawan G 
Published: March 2021

Abstract
The existence of regional languages shows an identity of the existence of a tribe. Indonesia has many regional languages, one of which is Balinese with Balinese script as input for the script which comes from Sanskrit. Reading Balinese script requires knowledge of Balinese script and Balinese culture in order to be able to correctly pronounce the written Balinese script. Since learning Balinese script took a long learning process, it certainly causes a slowdown in knowledge about how to read the Balinese script. Therefore, it is necessary to have a system that can translate Balinese script into a speech so that it can be used in learning the Balinese script without any mistakes in pronouncing vowels. This research designed a system synthesis of Balinese script into a speech with the system synthesis method of Noto Serif Balinese Font which consists of three processes namely text pre-processing, prosody generation, and concatenation. Concatenation or combining speech will use the Pitch Synchronous Overlap Add Method (PSOLA). The result to be achieved in this research is to be able to decompose the Unicode from the Noto Serif Balinese font into a sentence which then this sentence will become a message. In the future, this research can use input from an image to directly enter into speech. Making it easier for users to translate the Balinese script.
The Development of search engine service for official academic documents
Authors: Paramartha A A G Y , Dewi L J E 
Published: March 2021

AbstractDocument search engines are necessary in educational institutions, where search engines are expected to find the right document quickly. Academic official documents are generally private so that public search engines such as Google cannot index and search these documents. Therefore, we need a specific search engine developed for educational institutions’ needs, in this case, Universitas Pendidikan Ganesha. This article discussed how to develop an academic official document search engine, starting from data retrieval and extraction, query parser development, and search engine evaluation. The query parser developed utilized the field annotation mapping mechanism and n-gram keyword mapping. The evaluation results showed a significant increase in performance compared to only using Solr’s Standard Query Parser.
Business process improvement design of complaints on technical information system problems using the business process improvement method
Authors: Pradnyana I M A , Listartha I M E 
Published: March 2021

Abstract
Various attempts were made to optimize the quality of ICT services. UPT. TIK Undiksha is one of the ICT organizational units that have been supporting business processes for Undiksha’s main business processes to produce quality graduates. This study aims to provide recommendations for the improvement of one of the business processes at UPT. TIK Undiksha. The researcher proposes a business process design to be used as complaints regarding on technical information systems problems (To-Be) based on the results of the As-Is business process modelling and evaluation of the problems. Business Process Improvement (BPI) method was used for the analysis, evaluation, and recommendations for business process improvement. Further, the streamlining tools proposed to optimize the As-Is the business processes are standardization and upgrading. The simulation results show that the use of resources and time for the design business process was decreased compared to the current business process.
Evaluation of contrast enhancement methods on finger vein NIR images
Authors: Maysanjaya I M D , Kesiman M W A , Putrama I M 
Published: March 2021

Abstract
Biometrics is a technology used to identify a person based on physical characteristics and behavioural characteristics. Biometrics is used to increase the importance of personal data. However, many biometric models can be manipulated, such as fingerprints. To cover the fragility, a biometric pattern based on a blood vein, such as a finger vein pattern, was developed. To obtain a clear image of the finger vein, one of the acquisition toolsused is called Near-Infrared (NIR). Despite using NIR technology in the acquisition process, it is not uncommon for the finger vein pattern to be unclear. To overcome this problem, it is necessary to increase the contrast quality of the image. This study proposes the use of the BPDFHE method to improve the contrast quality of finger vein NIR images. As a comparison material for performance tests, the HE, AHE, and CLAHE methods were also tested. The test is carried out according to AMBE, PSNR, SSIM, FSIM, and computation time parameters. Based on the test, the results showed that the BPDFHE obtains AMBE, PSNR, SSIM, and FSIM up to 0.054, 26.873, 0.840, and 0.906, respectively. It also gains less computation time up to 10.988 seconds. These results indicate that BPDFHE is an effective and efficient method in improving the contrast quality of finger vein NIR images.
Content development of flipped classroom-based for microteaching course
Authors: Sugihartini N , Wahyuni D S , Dewi K S 
Published: March 2021

Abstract
This research was proposed to develop and generate a flipped learning based instructional media for the Microteaching course, to improve students’ concept mastery and teaching skills. ADDIE was used as the research method to achieve the goal of this research, which consists of 1) analysis, 2) design, 3) development, 4) implementation, 5) evaluation. In the first step, the analysis of the system needs and the analysis of TIU/TIK on the microteaching course based on the syllabus. In the second step, the design of flipped classroom-based microteaching content systematics and the design of system, database, and interface were carried out. In the third step, the development step was the following step of all that had been designed. The arrangement of microteaching content followed the syllabus and the integration into the learning management system by using Moodle. The implementation step was to insert the microteaching content into Moodle as the platform. In the evaluation step, several tests were carried out on the expert, including design expert, content expert, and media expert.
Do educational robotics competitions impact students’ learning?
Authors: Zuhrie M S , Buditjahjanto I G P A , Nurlaela L , Basuki I 
Published: March 2021

Abstract
The development of robot technology has grown rapidly. Robots have been widely used in various aspects to help human’s interests. In the education sector, robots have also been used as a learning tool to assist in studying fields such as science and technology. Currently, to encourage the development of robots in the education sector, robot competitions are held with various kinds of events. The types of robots developed to participate in robot competitions are also varied, such as mobile robot contest, modular robot contest, humanoid robot contest, flying robot contest, underwater robot contest, innovation robot contest, brick robot contest, and VR robot contest. The robot competition events are held nationally and internationally. The purposes of this study were to identify what kind of skills obtained by students after following the learning process using educational robotics competitions and to determine the appropriate learning model for the use of educational robotics competitions in studying the field of science and technology. This research was a literature review research. The research method was the Comprehensive Literature Review (CLR). This method has three phases such as 1) exploring phase, 2) interpretation phase, and 3) communication phase. The results showed that the learning model that was widely used in educational robotics competitions was project-based learning and was followed by problem-based learning. The skills obtained were to assist understanding science and technology, to develop computer programming skills, to sharpen problem-solving capability, to foster creativity and innovation, to bridge the gap between theory and practice, and to practice teamwork and social skills.
The principles of blended learning design with heutagogy approach thourgh e-ganesha moodle in indonesian language learning
Authors: Dewantara I P M , Dibia I K 
Published: March 2021

Abstract
This study aimed to discover the principles of blended learning design with a heutagogy approach through e-ganesha Moodle. The research design used was a qualitative design with Design Based Research (DBR) method. The subjects of this study were students, lecturers, and education experts. The research setting was Indonesian language subject at the Ganesha University of Education. The data collection method used were observation and interviews, while the data were analysed by using the technique proposed by Miles and Huberman. The results showed that there were 8 principles of blended learning design with a heutagogy approach, including (1) the curriculum was open or flexible so that it could be adjusted to the characteristics of students; (2) Learners acted as drivers in determining learning paths, activities, and contents; (3) Preparation of students before the curriculum discussion needed to be done by sending materials before discussions related to learning activities were carried out; (4) Educators acted as facilitators to assist students in increasing self-efficacy; (5) Students were involved in the design of the assessment that was enforced and had flexibility by looking at the existing situation; (6) Synchronous and asynchronous modes occurred individually or collaboratively; (7) Synchronous and asynchronous modes by looking at the involvement of technology and the independence of students could be divided into 6 learning mode designs, namely (a) face to face, (b) face to face tutorial, (c) virtual face, (d) full instruction and content, (e) semi instruction and content, and (f) independent learning; and (8) Reflecting on learning to increase self-efficacy.
Developing project based e-learning content for basic computer system course
Authors: Sindu I G P , Permana A A J 
Published: March 2021

Abstract
This study aimed to develop E-learning content for the Basic Computer System course through project-based learning model. The present research was a research and development by using the Dick & Carey Model. There were five stages of development in the present research, namely: determining the course as object of the development, needs analysis, developing a draft, running the Universitas Pendidikan Ganesha E-learning software, and testing (content expert reviews and field trials). The result of the development was positive. It means that the content can facilitate lecturers and students during teaching and learning process. The content was also able to improve students’ level of mastery of basic computer systems material. Both students and lecturers were not limited by place and time because E-learning content of the Basic Computer System course can be accessed anytime and anywhere.
Effect of problem-based learning on critical thinking skills
Authors: Fadilla N , Nurlaela L , Rijanto T , Ariyanto S R , Rahmah L , Huda S 
Published: March 2021

AbstractStudents’ critical thinking skills cannot develop appropriately if in the learning process, the teacher is not active. Therefore, to improve students’ critical thinking skills, a teacher should choose and use strategies, approaches, and methods techniques that involve students actively in learning, both in manner mental, physical, and social. One alternative learning that provides opportunities for students to develop students’ critical thinking skills in problem solving is problem-based learning. This research was a research study literature examining related journal application of problem-based learning to improve critical thinking skills. The findings of this study included: (1) the implementation of PBL has the potential to help students motivate and provide learning experiences; and (2) PBL implementation is very useful in improving students’ critical thinking skills, provided that teachers and students can apply each stage of PBL well.