bluuebunny/crossref_metadata_2025 huggingface dataset:
Anticorrosion and antibacterial effects of new Schiff base derived from hydrazine
Authors: Al-Baghdadi Shaimaa B. , Kadhim Abdulhadi , Sulaiman Ghassan , Al-Amiery Ahmed A. , Abdul Amir H. Kadhum , Takriff MS
Published: March 2021

In general, the diminish of corrosion is controlled by different techniques. Typically, the applied corrosion inhibitor was proved to be a simple and inexpensive technique for corrosion prevention and protection in a corrosive environment. Herein we synthesized a new corrosion inhibitor namely “Benzyl 2-(1-(5-methyl-1-(p-tolyl)-1H-1,2,3-triazole-4-yl)-ethylidene) hydrazine-1-carbodithioate” (BTC). The chemical structure of the tested inhibitor has been elucidating by FT-IR and NMR spectroscopically methods and the number of carbons hydrogen and nitrogen atoms for chemical formula was detected through using CHN analysis. BTC was investigated as a novel inhibitor for mild steel (MS) in an HCl environment, and the inhibition efficiency has been tested gravimetric technique. The results showed that the corrosion rate (CR) and inhibition efficiency (IE%) are in an inverse relationship with each other, as the IE increases with increasing the inhibitor concentration while the CR decreases with increasing concentration. The inhibition efficiency was up to 93.4% at 303.0K in presence of BTC (0.5 mM). The IE decreases with increasing temperature especially at 333 K. The adsorption of BTC on the MS surface was obeyed the adsorption of Langmuir isotherm. In a parallel study, the BTC was examined as an antibacterial compound for Escherichia coli and Staphylococcus aureus. The results showed that the new substance has the significant potential to inhibit the growth of bacterial.
Influence of laser energy on the optoelectronic properties of NiO/Si heterojunction
Authors: Khashan Khawla S. , Saimon Jehan A. , Hadi Aseel A. , Mahdi Rana O.
Published: March 2021

In the current work, NiONPs/Si Heterojunction Photodetector was fabricated using a drop-casting method of the Nickel Oxide (NiO) nanomaterial (produced by laser ablation in the water) on silicon (Si) substrate. The impact of laser energy on the preparation of NiO nanoparticles was investigated. The shape of the NiO NPs was a quasi-spherical particle with average particles size 16, 20, and 24 nm with high aggregations. The bandgap was direct and varying from 3.8 to 3.6 eV; relies on the laser energy. The current-voltage characteristics of NiO/Si heterostructure photodetector have a good rectifying property with suitable high spectral responsivity at the UV region, which found that the best value is 0.8 A/W @ 330 nm for a sample produced at 700mJ.
Synthesis, Characterization and Optoelectronic device application of ZnO nano structure
Authors: Abed Ali L. , Khalef Wafaa K. , Salim Evan T.
Published: March 2021

A clear ZnO nanowire was obtained using the Pulse laser deposition technique on a silicon and quartz substrate. Thermal oxidation at 650 °C for 1 hour was used, employing conventional tube furnace. The structural properties ensure the formation of quantizing ZnO. The electrical properties of prepared ZnO NWs/Si films reveal a good rectification with maximum optical Responsivity in the UV region reach to 0.3A W.
A comparative Analysis of PV Cell Mathematical Model
Authors: Rasheed M. , Mohammed O. Y. , Shihab S. , Al-Adili Aqeel
Published: March 2021

Several methods are currently used to calculate the values of voltage, current, and power of a solar cell. A new method is suggested to numerically find these values using the popular methods Newton Raphson method (NRM) and the three-step method (TSM) at different values of load resistance R. Equation based on the equivalent circuit of a solar cell, so all calculations is performed in a MATLAB at room temperature. The obtained results of this new method were presented and compared with NRM. Additionally, a single diode model of a solar cell was demonstrated.
Influence of Laser wavelength on morphological and optical properties of ZnO nanoparticles prepared by laser ablation in water
Authors: Yousif Nwar A. , Al-Jawad Selma M. H.
Published: March 2021

Nanoparticles (NPs) of Zinc oxide (ZnO) were prepared utilizing pulsed laser ablation of a Zinc metal plate in deionized water without utilizing surfactant. The effect of Laser wavelength on the characterization of ZnO was investigated. The 1064-nm and 532-nm wavelength beams produced from a Q-switched Nd: YAG laser at 10 ns pulse duration were employed. The SEM images displayed that the average diameter of the Zinc oxide NPs generated by the laser wavelength 532-nm are larger than the 1064-nm laser wavelength nanoparticles. Various sizes were observed of round ZnO nanoparticles in the SEM image. As the laser wavelength increased, the density of the nanoparticles in water increased. UV–vis analyses revealed that the absorption peak located at 342 nm (1064nm) and 344 nm (532nm). The nanoparticles formed at 1064 nm exhibited higher absorbance than the nanoparticles formed at 532 nm. The optical band gap is considered to be 3.42 eV for 1064 nm and 3.4 eV for 532 nm.
Preparation and characterization of colloidal Au-ZnO Nanocomposite via laser ablation in deionized water and study their antioxidant activity
Authors: Rashid Taha M , Jabi Majid S , Nayef Uday M
Published: March 2021

A synthesis is carried out with Au-ZnO nanoparticles (NPs), using fundamental laser Nd:YAG (1064 nm) of Au and ZnO colloidal solution, with the metal objectives in deionized water being extracted, accompanied by laser radiation a second harmonic Laser 532nm with the mixed colloidal solution, The UV-visible display the Au nanoparticle peak at 525nm, and the ZnO peak at 415nm. The Au-ZnO NPs show a shift of the ZnO absorption at 390nm, which is excited, and a change in the Au absorption at 530nm, as the Au NPs plasmon resonance is transmitted through an interface charge. The optical band gaps of the ZnO, Au and Au-ZnO NPs are increased with laser fluence up to 13.8 J/cm2. The antioxidant activities of prepared nanoparticles were measured using DPPH assay. The results showed the ability to scavenging of free radicals. Taken together, the results of this study demonstrated that the Au-ZnO nanocomposite could be used in future for therapeutic purposes.
Optical and Structural Properties of the Gold Nanoparticles Ablated by Laser Ablation in Ethanol for Biosensors
Authors: Ali Hiyam S. , Fakhri Makram A. , Khalifa Zeina
Published: March 2021

In this paper, the laser wavelength effects on the physical properties of the gold nanoparticle (Au NPs) ablated using laser ablation in the ethanol in the ethanol. In this technique we used a high purity gold target for ablated the NPs and using a tattoo removal Q switching Nd:YAG laser, with a 6 nanosecond pulse duration, 2000 mj energy, 500 laser pulses for ablation and 6 Hz of the frequency, then we investigated of the gold NPs by the structural results as the X-ray diffraction analysis, and the optical analysis. The presented results gives the ablated nanoparticles characteristics, as presented of the results of the XRD, and the UV-vis ablated by laser at different wavelength preparation conditions, where the best preparation condition are at 532 nm better than tha ablated by laser wavelength of 1064 nm.
Green synthesis of reduce graphene oxide by green tea leaves
Authors: Abdulmageed Hamsa A. , Judran Abdulhadi. K. , Noori Farah T. M.
Published: March 2021

Nowadays using green chemical synthesis is more common because it is minimized the side effect of chemical reaction emission. In this study graphene oxide (GO) and reduction it to (rGO) synthesis to explore its advantage in different field. This research present overview of green synthesis of (rGO) using green tea leaves as reducing agents. Besides, it also gives analyzing of (GO) and (rGO) by using X-ray diffraction (XRD), Fourier Transmission Infrared (FTIR) and Ultraviolet-Visible spectroscopy (UV-Vis). X-ray spectra has proven that (GO) and (rGO) were successfully synthesized by illustrating peak at (11.22, e ec i e y images, monolayers with mean grain size (41.7990,) nm respectively for (GO) and (rGO). Moreover, the FTIR showed that the amount of oxygen group reduced in (rGO) while UV-Vis spectra proved the absorption peak of GO (285nm) and rGO (295nm) at different location. Therefore, this green method can reduce rely on the chemical material.
Developing home health care application for patient during the covid-19 pandemic
Authors: Permana A A J , Sindu I G P , Pageh I M
Published: March 2021

The term “Priyayi” or willing to be served in Indonesia as a social context really encourages start-up developers to develop products. Also, Covid-19 pandemic makes people anxious to visit hospitals or “Puskesmas” (Community Health Care Service). The development of home care applications is prospective in Indonesia, especially in Singaraja, Bali. It greatly assists the community to get health services in their homes so that it is safer and more comfortable than queuing for services at hospitals and clinics. This research is descriptive qualitative research. The applications are developed using the Agile Method. The data is obtained through observations, interviews, and previous scientific research and study. Based on the results of interviews, 80% of respondents wanted the development of this application. Furthermore, the result of Alpha testing showed that the system could ran well. The usability Testing Process used the System Usability Scale (SUS) questionnaire with 20 respondents resulted in a “Good” value (65,125) so that this application followed the needs of people who want to get health care at home during the Covid-19 pandemic.
Road extraction in satellite image with fuzzy c-mean
Authors: Melati I G A S , Januhari N N U , Yaputra A
Published: March 2021

Algorithm Fuzzy C-Means is a data grouping technology where the level of data presence in a class or cluster is determined by the degree of membership. The-based image segmentation clustering in this study applied the Fuzzy C Means method to obtain a more optimal cluster center. Preprocessing applied to the test image used in the proposed method was gradient operation. System evaluation was applied following two approaches, namely measuring the value validity cluster. The test results show that the FCM-Means algorithm produced better segmentation. The results of the clustering produced colors on the road. The value of each pixel was limited to the value 0 or the value 1 in the binary image. In this Fuzzy C-Means algorithm, each object / data can be a member of several clusters.
Analysis of e-learning user satisfaction itb stikom bali using end user computing satisfaction (eucs) method
Authors: Putera W A , Candiasa I M
Published: March 2021

The development of internet technology has spurred the emergence of various new applications that support activities in various fields, including in the field of education such as e-learning. ITB STIKOM Bali has its own developed e-learning system. In e-learning, there are several navigation menus such as course information, meeting descriptions, file uploads, discussion activities, and others that are prepared for students as users. This study aims to determine the level of satisfaction of e-learning users. The level of satisfaction was measured using the End User Computing Satisfaction (EUCS) method involving 177 students as respondents who were randomly selected. The data collection method in this study used a questionnaire. From the results of the analysis of the data that has been collected, the following results are obtained: Based on the results of the calculation of the average level of satisfaction, the value is 4.54 on the content variable, the accuracy variable is 4.48, the shape variable is 4.53. on the timeliness variable, the score was 4.5, the user convenience variable scored 4.51, and when combined with the satisfaction level according to Kaplan and Norton, it could be concluded that the level of user satisfaction with e-learning was included in the very satisfied category.
Evaluation of instrument testing of change agents at denpasar high court with stake model
Authors: Suharsana I K , Divayana D G H , Indrawan G
Published: March 2021

Evaluation is important for the improvement of a process or an activity. Evaluation activities are carried out at Denpasar High Court. One of the evaluation activities is determining the agent of change. The determination of the agent of change at Denpasar High Court is carried out through a selection process. This selection process uses 10 criteria. Currently, the process of selecting or determining agents of change at Denpasar High Court is still being carried out manually and some of the criteria are not based on physical data or documents. Accordingly, it is important to evaluate the criteria for determining agents of change. To simplify the evaluation process, this research used a stake evaluation model. The evaluation process uses assistance instrument. The instrument also determines the success of the evaluation process. To produce a good instrument, it is necessary to test the instrument. Therefore, this research conducted an instrument testing in form of a test on the validity and reliability of each question item on the instrument. The purpose of this research was to determine the level of validity and reliability of the evaluation instrument of agents of change at Denpasar High Court by using the stake model. The method used in this research was quantitative approach method. The test tool used was a questionnaire. Respondents of the research were 15 people who were agents of change and evaluators. The analysis technique used to test the validity was product-moment correlation. Additionally, the reliability analysis used Cronbach Alpha. The result of this research was the evaluation instrument of agents of change at Denpasar High Court with the stake model. Based on the result of the validity test, it was found that 21 instrument items were valid. Based on the result of the reliability test, it was found that all instrument items were reliable. Therefore, it can be concluded that this instrument is ready to use as an evaluation tool for agents of change at Denpasar High Court with the stake model.
Indonesian sentiment summarization for lecturer learning evaluation by using textrank algorithm
Authors: Darmawiguna I G M , Pradnyana G A , Jyotisananda I B
Published: March 2021

Learning evaluation is a very important process to assess lecturer performances. Evaluation is carried out at the end of the semester by students. Student can give comments, critics, suggestions related to the subject taught by the lecturers. To analyse student comments, the lecturer can read the entire comments one by one. The main focus in this research was to develop the system that will be applied in summarizing student comments on the implementation of course learning. The algorithm that was used to perform text summarization was the TextRank algorithm. TextRank is a graph-based ranking algorithm (a graph with a ranking model) for processing text from natural or human language documents. We used 100 data sentiments by students to lecturers who teach one course in one semester. It was directly taken from SIAK (academic information system) by using web services. Based on the evaluation of the summaries by the expert, it was found that the textRank algorithm is quite representative in performing summarization for sentiments with the accuracy of 82%.
Double exponential smoothing brown method towards sales forecasting system with a linear and non-stationary data trend
Authors: Dharmawan P A S , Indradewi I G A A D
Published: March 2021

UD Parama Store is a trading company engaged in selling retail goods that sell various types of daily necessities retail. The major problems occurred are the difficulty in predicting the sales due to the maturity level of experience, customer demand changes, and the owner’s limited memory. Therefore, there should be an increase of merchandise stock to prevent any sudden decrease in sales and overcome the stock shortage when there is an increase in sales. In this current research, a sales forecasting web-based system was designed and built to assist the owner in predicting the number of sales in the next period. As a result, decisions can be made in determining the number of goods to be provided. The forecasting method used was double exponential smoothing brown by improving forecasting, averaging (smoothing) the past value of a time coherent data, and decreasing (exponential), which requires one parameter only. It was used to increase and decrease the linear and non-stationary data. The calculation of forecasting accuracy using the MAPE (Mean Absolute Percentage Error) method in forecasting sales of merchandise produces the smallest error rate ranging from 7.99% to 32.42% for 10 different items.
Web-based Buleleng regency agriculture product information system development
Authors: Dewi L J E , Wijaya I N S W , Seputra K A
Published: March 2021

Agriculture is very important for the welfare of the nation. However, accurate and up-to-date agriculture data in the Buleleng regency are difficult to find. This study was aimed at making a developmental design of Web-based Buleleng regency agriculture product information system and implementing it to support the region’s best products-based regional people economy. The development of this system used the Software Development Life Cycle (SDLC) method with Waterfall model that followed five stages of activities, namely (a) requirements definition, (b) system, and software design, (c) implementation and unit testing, (d) integration and testing, and (e) operation and maintenance. The data needed in the system was obtained by working together with the Buleleng regency agricultural office. Later this system will involve some users with different accessing rights, namely field agriculture extension agents who manage product data, the workers of the agriculture office as administrators of the system, the general public, and consumers who probably come from hotels, restaurants, supermarkets, etc that become the markets of the agriculture products in Buleleng regency. Consumers can order the products. However, this system does not handle online payments. It is expected that with this system Buleleng regency will have accurate and up-to-date data related to agriculture products that are available in Buleleng. In addition, this system can be used as a model for other regencies in Bali and other regions in Indonesia. With the availability of this system in the future, the farmers as producers will get good prices for their products and the consumers will get products of good quality at reasonable prices.
Manik angkeran storytelling based on android mobile tap gameplay
Authors: Yusa I M M , Pandawana I D G A , Putra I N A S , Herawan T
Published: March 2021

This research objective was to structure a presentation of a Balinese popular folk tale as an educational strategy through a mobile game with easy-to-play gameplay. This study had 3 (three) main objectives: (1) building the Manik Angkeran story, which is the famous folk tale circulating in Balinese society, Indonesia; (2) realizing the Manik Angkeran game that highlights Balinese characteristics; (3) implementing easy-to-play gameplay. In developing the original story of Manik Angkeran, the strategies carried out were: (1) building a new story with the main character, Manik Angkeran; (2) highlighting Balinese characteristics in character design, game background, and background music in fighting scenes; (3) chosing tap-mode game considering the simplicity and efficiency. The result of this study was Manik Angkeran Game with Tap Game genre based on Android. The game requires players to tap on the screen to move Manik Angkeran, with a mission to defeat the enemy/monster to collect gold coins (Pis Bolong Mas). Later, these coins can be used to buy building materials, which will be used to build dormitories (Pesraman). The test results using the BlackBox Testing method showed that the functionality of the navigation buttons and the entire functions of the game were running well as desired. For the results of testing the game on several different screen resolutions, showed that the display of this game was able to adjust on different screen resolutions and the image display remains sharp. This game was also capable to run on a minimum Android device v.3.0 HoneyComb, until the latest version at this time is v.9.0 Pie. Research disclosure starts with the Introduction, which reveals the background and purpose of the study. Furthermore, the discussion swooped over to the research method used. The process of pre-production, production to post-production was he model or technique used in making games. The results revealed the evaluation of the black box to test the readiness of the system.
Students’s acceptance toward the use of mobile learning in fractions
Authors: Rochmah I N , Hwang W-Y , Priyanto
Published: March 2021

Most of the fifth-grade students have been familiar with mobile technology and commonly use it to play games. Accordingly, the school do not allow fifth-grade students to bring or operate mobile technology while they are at school in order to keep students’ attention on learning. However, during the pandemic COVID-19 condition, the government demands students to learn from home. Thus, one solution is using mobile technology to maintain communication and interaction between students and teachers during teaching and learning activities from home. The present study developed a mobile application, called U-Fraction, to assist students in the mobile learning process. The developed application was associated with authentic learning so that students could have stronger understanding of the real-world problems. Students’ perception toward the mobile learning supported by U-Fraction were measured using TAM with partial least square analysis. The result shows that students tended to use this mobile application for mobile learning. Students also believed that the use of U-Fraction for mobile learning could help their learning process.
Designing augmented reality sibi sign language as a learning media
Authors: Aditama P W , Putra P S U , Yusa I M M , Putra I N T A
Published: March 2021

Sign language is language used by deaf people to exchange information. Indonesia has two sign languages used in its application, namely SIBI and BISINDO. SIBI is an adaptation of the American Sign Language which is currently being applied in a special school (SLB) environment. To provide support in learning SIBI sign language in technological advances, the design of Augmented Reality to introduce the letters SIBI will help in the learning process. The black box test results showed all the features and functions of the application can run well. In observing the response time when scanning markers using the Xiaomi PocoF1 marker on the letters SIBI, it had an average time of 6.05 seconds. Observation of the scan distance of the SIBI letter, the average scan distance of the marker can be scanned at a distance of 5 cm to 50 cm.
Schoology based applied mathematics blended learning model to improve the students’ problem-solving ability
Authors: Darma I K , Karma I G M , Santiana I M A
Published: March 2021

This study aims to determine the feasibility of a model of blended learning applied mathematics using schoology for vocational education using the 4D model development method that includes the four Ds steps, namely Define, Design, Develop, and Disseminate. The research was conducted at the Politeknik Negeri Bali where the data were collected using a validation sheet and student response questionnaire sheet. Data were analyzed descriptively. As a result, the design of applied mathematics blended learning using schoology achieved: feasibility level of 84.91% (feasible), practicality 78.84% (practical), and the compliance was 88.02% (very helpful). This implies that blended learning applied mathematics is very appropriate to be used as a model of learning in vocational education. The design development can be continued to the stage of effectiveness testing, evaluation and dissemination.
Validity testing of blended learning based on android smartphones in computer device maintenance course
Authors: Wijaya I , Sefriani R , Menrisal
Published: March 2021

This study aimed to determine the validity level of blended learning media to support the blended learning process. This was a Research and Development (R&D) using the 4D development model. The model involved four steps, namely: 1) Define, 2) Design, 3) Development, and 4) Assessment. Based on the research that has been done, the average value of the test assessment for Android media to support the learning process through Blended Learning is 94.28% which level of validity can be interpreted as very valid. Based on the assessment and input from material experts, Android application software experts and multimedia experts, it can be concluded that the blended learning media is suitable for learning the maintenance of computer devices in the Informatics Engineering Education Department.
Designing video based learning for nursing skills procedures video
Authors: Sutrisno D , Buhari B
Published: March 2021

Blended Learning is a learning that combines face-to-face and online learning. In nursing practice courses, learning media about basic skills action procedures in nursing that can be accessed online is needed. Thus, it is necessary to design an instructional media containing action instructions for basic skills in nursing. The purpose of this research was to make video-based learning media as a guide to nursing procedures and to find out the results of the video-based learning media test. There were eight (8) stages in designing instructional media, namely: (1) writing video scripts, (2) taking video images, (3) editing videos, (4) validating, (5) revising, (6) uploading videos, (7) presenting videos to students, and (8) evaluating. This research was expected to produce teaching materials in the form of instructional video to support the lecturing process. The result of this study showed that the videos are very worthy.
The effect of digital books based on kvisoft flipbook maker on student learning outcomes
Authors: Suyasa P W A , Divayana D G H , Kristiantari M R
Published: March 2021

This study aimed at determining the learning outcomes of students who use digital books based on the kvisoft flipbook maker compared to the students without using digital books based on kvisoft flipbooks. It is because students learning outcomes were low so we use digital books based on kvisoft flipbook maker. This type of research was a quasi-experimental design with Post-test-Only Control Group Design. The data collection method used was the description test method to measure student learning outcomes. The learning outcome data were then analyzed using one-way ANOVA with prerequisite tests, namely the normality test and the homogeneity test. The results showed that there were several differences in the learning outcomes of students who used kvisoft flipbook-based digital books and students without using kvisoft flipbook-based digital books. The results of the analysis showed with a significance of 0.000. If the significance level is set = 0.05, and the significance value is smaller than α so that F is significant. This means that H0 was rejected and H1 was accepted, which states that there are differences in learning outcomes between students who took lessons using Kvisoft Flipbook Maker based digital books compared to the students who took lessons without using Kvisoft Flipbook Maker based digital books. The mean of experiment group was 84.56 and mean of control group was 70.32.
Student-centered learning models and learning outcomes: meta-analysis and effect sizes on the students’ thesis
Authors: Agustini K , Wahyuni D S , Mertayasa I N E , Wedhanti N K , Sukrawarpala W
Published: March 2021

A meta-analysis of students’ thesis is very necessary to improve the quality of research in maintaining the consistency and scientific truth justification of the theory. This study aims to (i) obtain an effect-size estimation, which is the strength of the relationship between the variables studied in a quasi-experimental study; (ii) describe the effectiveness of student-centered learning models compared to teacher-centered learning on learning outcomes; (iii) describe the conditions that affect the effectiveness of the student-centered learning models in the final assignments of students of Informatics Engineering, Universitas Pendidikan Ganesha. In order to achieve this goal, 22 students’ final assignments were reviewed as research samples. The study focused on two things, namely, (a) calculating the effect size of each sample of the theses; (b) examining the theoretical and empirical justification used to discuss the acceptance of the hypothesis. Statistical analysis techniques were used to determine the value of the effect size. The results showed, the effect-size value for the entire sample was 1.109 in the high category. Then, the results of the study of the t value for all the thesis studied showed all t-count values were greater than t-table values at a significant level of 0.05. It means student-centered learning models are better than teacher-centered learning models on the learning outcome variables studied.
A feasibility study of sensor and transducer trainers as a learning media towards electronics engineering’s students
Authors: Purnamawati  , Akil M , Nuridayanti
Published: March 2021

This research aimed at determining the feasibility of sensor and transducer trainer as a learning media applied for Electronics Engineering students of FT UNM. This study’s feasibility indicators were divided into 3, namely feasible in terms of material, media, and responses from the students as users of these media trainers. The method applied in this research was Research and Development (R&D) by developing a sensor and transducer trainer. The data analysis technique used was descriptive statistical analysis. A questionnaire was used to collect the data by targeting 4 lecturers as media and material experts, while 27 students participated as a respondent. The assessment results from the material expert validator were obtained an average value of the feasibility percentage of 97%, while the assessment of the media expert received an average value of 96%. Based on this assessment, the media trainer was worthy of both the material’s content and its performance. Meanwhile, the value of students’ responses towards the use of trainers after being tested reached 84% with a very good category. The feasibility test results generally showed that the trainer could be used in practical learning of sensor and transducer course. This trainer could be developed with the addition of IoT (Internet of Things) technology to perform remote monitoring and control systems.
Consumption and Production of Short Film: toward the Conceptualization of Multimodal Language Learning for Developing 6Cs Skills in the Digital Age
Authors: Puspawati N W N , Suwastini N K A , Hutapea J V , Dantes G R , Adnyani N L P S
Published: March 2021

The 21st century’s democratization and demonetisation of multimodal learning sources allows anyone to be both consumers and producers at the same time. The present study argues that the consumption and production of independent short films through affordable digital devices as beneficial for multimodal language learning, befitting the student’s interest and the building of the six essential skills of their 21st-century context. The present study was designed as library research observing 30 most recommended articles in the related topic by Google Scholar, published in reputable international journal from 2010 to 2020. It is argued that consumption and productions of short films can be used for enhancing the students’ language skills. They can be used to tap the students’ creativity, communicative skills, critical thinking, and collaborative skills. At the same time, they can also be used to enhance their compassion toward issues around their society and environment during the implementation of procedural and computational thinking in this consumption and productions of short films. These also place the students as the subjects of the learning process, where their views, opinions, and feelings about certain issues matter so they can play their role in making the world a better place to live in.
Application of partial credit models in testing performance assessments for programming course
Authors: Mertasari N M S , Candiasa I M
Published: March 2021

The assessment of programming skills must be able to measure holistically the theoretical abilities and programming skills. Performance assessment is seen as an appropriate assessment to measure programming ability because it is able to evaluate authentic ability through the process carried out or the product produced. The problem that often arises is performance assessment testing to measure programming capabilities. On this occasion, the Partial Credit Model (PCM) was tried to test performance assessments to measure programming capabilities. PCM is a development of the Rasch model, which applies one parameter, namely the item difficulty index. If the Rasch model is applied to dichotomous items, then PCM is applied to politomic items. PCM assumes that all items have the same difference power. The category score on the PCM shows the per-step score for correctly completing the item according to the scoring rubric developed. The probability of each test taker is estimated by calculating the probability of answering each step in completing an item. There were five items that were tested in two parallel classes in relatively different times. The test results showed a difference in probability in the two classes, but the difference was not too far away. So, the performance assessment was precise enough to measure programming capability, and the test results were quite precise when tested with PCM.
Impact of cognitive styles on students’ psychomotoric abilities on multimedia course practicum
Authors: Mertayasa I N E , Subawa I G B , Agustini K , Wahyuni D S
Published: March 2021

Cognitive style refers to the way person processes, stores or uses information to respond to a task and different types of environmental situations. Cognitive style determines the way students collect and use information. On the words, it relates to how students respond to the learning process in the classroom. The purpose of this study is to examine the relationship of a student’s psychomotor abilities to a student’s cognitive style. Using quantitative design, this research it will be scientifically known how much cognitive style contributes to a student’s psychomotor abilities. The sample of this study is student who took Multimedia Technology courses in department of informatics and engineering education. Descriptive statistical analysis and inference statistical analysis were used to analyse the data. The results of this study revealed that there was a significant impact on the cognitive styles of the students in both dependent fields and independent fields.
Gamification design for high school student with unstable internet connection during covid-19 pandemic
Authors: Aristana M D W , Ardiana D P Y
Published: March 2021

Balinese society is a unique combination of traditions, culture, religion, values and moral values with a background of beautiful nature. As the centre of this combination is the Hindu Religion, which is the faith of the majority thus it is taught to students from elemntary school to high school. However, the Covid-19 pandemic, the teaching of Hindu religion has been switched to online leanring, at it poses challenges, such as lack of technological skill on the part of the teachers, unstable internet access, the use of large internet quotas, and inadequate electronic devices on the part of the students. The methods that can be used to increase student motivation and student involvement is gamification. Marczewski Gamification Framework was used to design gamification in Hindu religious subjects. In this study, the achiever user type was applied. This research used 3 game mechanics, Level/Progression, Quest/Challenges, Achievements/Rewards.
Adaptation strategy of authentic assessment in online learning during the covid-19 pandemic
Authors: Sutadji E , Susilo H , Wibawa A P , Jabari N A M , Rohmad S N
Published: March 2021

The crisis caused by the Covid-19 virus has a far-reaching impact on education, as schools have been closed since March 2020 in many countries around the world. However, despite certain limitations, the current situation demands action, so that the educational process for students around the world is not affected at all, including the assessment process. To make it effective, assessments must be active and authentic in online education. The problem is, until no, no instructional designs have been found for authentic online assessments. Thus, this study aimed to create an authentic assessment strategy adapted from the current implementation. In general, the method used in this research was development research compiled through surveys and developed qualitatively. The results showed that the forms of assessment that can be done were: doing a written test with case study questions or analysis provided in the online platform; online discussions with peer assessments as well as assessment of activeness by teachers; writing papers and analyze case studies including conducting reviews and criticisms. In principle, online teaching and learning can be delivered either asynchronously or synchronously. In the asynchronous assessment method, which is not done in real-time, assignments, and portfolios can be used to assess students’ knowledge and skills. The synchronous assessment method is carried out in real-time during online teaching and learning process.
Students’ perceptions of online learning in teacher training and education faculty
Authors: Vega N D , Eppendi J
Published: March 2021

This research aimed at describing students’ perceptions of online courses. This present study used a survey approach. The data were collected using a questionnaire that distributes in online form. This research used a public opinion survey that classifies purpose-based classification. The researcher made five-stage model, according to the theory of Salmon. Stage 1 found that the most of respondents had access the Internet for study (44.6%) and capably using the keyboard (45.5%) or compose text on a computer/gadget (46.7%), but they lack motivation in online learning (93.4%). Stage 2 involved individual participants establishing online socialization, the respondents felt uncomfortable doing online communication (80.1%), but they were still active in the online classroom in interaction with lecturers (96.4%). After that, the data showed they preferred working in a group in offline (75.3%) rather than online class (47.3%). At stage 3 related to information exchange, the respondents needed to review the material (84.2%) due to remind the advanced material, made a priority to manage self-disciplined (65.2%) and time effectively (71.4%). At stage 4, course-related group discussions developed and the interaction becomes more collaborative (knowledge construction). In online learning, the respondents preferred to work independently (67.8%) rather than in groups (47.3%) or collaborate (52.7%) during learning activities. Stage 5, about the experience of offline and online learning showed that they had a benefit to studying. The similar results about students’ motivation, they lacked motivation and assumed that offline and online learning activity had different situations and goals.
Development of 21st century skill learning designs through the application of the concept of independent learning in the vocational field
Authors: Sudirtha I G , Widiartini N K , Anggendari M D
Published: March 2021

This research aimed to develop 21st Century skill learning tools through the application of the concept of independent learning curriculum for independent vocational campus, as the implementation of the policy for independent learning towards an independent campus by the Ministry of Education and Culture in 2020. This research was conducted using the research and development method with steps of defining, designing, developing, and disseminating. To determine the feasibility of the learning device’s result, a validation was carried out using the Gregory formula by using two fields’ experts, namely learning technology experts and vocational education experts. Furthermore, improvements were made from the results in the form of suggestions and input from experts. The results showed that the learning device for the independent learning curriculum concept course was declared valid and applicable. Therefore, it was very feasible to be used to support the implementation of courses that supported the independent learning policy for independent campus.
The simulation of alkin evaluation model based on SAW to evaluate flip learning in IT vocational schools
Authors: Mudiarta I M D R , Divayana D G H , Setemen K
Published: March 2021

The implementation of flip learning at SMK TI Bali Global Jimbaran experienced several obstacles such as not accustomed to independent learning students, teachers who are not used to making digital material and there is no official regulation of its implementation. This study aims to determine the percentage level of effectiveness and the constraints faced in implementing flip learning in schools using the Alkin evaluation model combined with SAW (Simple Additive Weighting). The samples in this study was taken using a simple random sampling technique, consisting of the principal, teachers, and students who actively carry out flip learning. The data in this study were collected using a questionnaire based on the components of the system assessment, program planning, program implementation, program improvement, and program certification. This study obtained calculations from the evaluation aspect from the highest to the lowest values with the SAW calculation. The highest score was the legality aspect in system assessment with a value of 0.4265 and the lowest score was hardware maintenance aspects of the program improvement with a value of 0.3996. This lowest aspect is recommended to be a priority for improvement.
The digital strategic partnership of covid-19 pandemic in the perspective of national resilience in indonesia
Authors: Sugiharto A , Aminanto M E
Published: March 2021

As Indonesia officially acknowledged as one of the countries infected by Covid-19, a solution model is needed during a pandemic, not only because of Covid-19, but also to anticipate a pandemic in the years to come. The theories used were the theory of the information society, the theory of covid-19, and the theory of the public private partnership. While the methodology used was qualitative. The results of the research described how to find solutions and also in the form of a solution model with mutual synergy. Given that this pandemic will end, we need a multidisciplinary approach, one of which is from the perspective of national resilience.
Summary of ship comprehensive degaussing
Authors: Fan Jianming , Zhao Wenchun , Liu Shengdao , Zhu Zhen
Published: March 2021

Improving the magnetic stealth capability of ships [7]is of great importance to the safety of ships. The comprehensive degaussing method is an important method of ship degaussing. This paper mainly introduces the principle, coil classification, key and difficult factors of the comprehensive degaussing method and its application prospect in China.
The logarithmic mean method for Nonlinear Conductivities at Cell Faces
Authors: Jia Xinxin , Sun Xiaoling , Wang Lei , Zhang Hao , Li Xiangchun , Hao Zongrui , Duuan Liya
Published: March 2021

In this work, logarithmic mean method, which is based on the assumption that the diffusion coefficients profile is linear between nodes, is developed to calculate diffusion coefficients at cell interfaces. The new method is evaluated by solving one dimension steady diffusion equation and convection diffusion equation with strongly non-linear diffusion coefficients. Results indicate that the logarithmic mean method can achieve high precision as the Kirchhoff integral mean method even if the number of nodes is small, while the harmonic mean method needs more nodes to achieve the same accuracy. Furthermore, the logarithmic mean method only needs the diffusion coefficients of nodes, the disadvantage of Kirchhoff method which needs concrete expression of diffusion coefficients and numerous integral operation thus can be overcome.
Measurement of Bullet Velocity Parameter from High-speed Sequential Images
Authors: Ma Huangping , Chen Peng , Shi Haibo , Zhao Jiajun
Published: March 2021

The bullet velocity parameter is the base of the next analysis of many impact experiments. A complete and rapid measurement of velocity parameter before and after an impact of the projectile on the target is a problem to be solved. We proposed a method aiming at measuring the bullet velocity parameter from high-speed sequential images, completely and fast. We firstly set up the high-speed camera sensor network for grabbing and storing of high-speed sequential images. It contained two high-speed cameras, a synchronous control system, two master-slave computers to control other systems, and the supplement light system. Subsequently, a surveying control network was constructed to solve the parameters of videogrammetry. 3D reconstruction was applied to the solution of the bullet center 3D coordinates, and the bullet velocity parameter was finally solved by the approach of time difference. The experiment of measurement of the bullet velocity was done successfully. The bullet velocity parameter we measured was provided to the criminal investigation department.
A Novel Power Amplifier Model Based on Simplified Neural Network
Authors: Zhang Jin , Wang Jingqi , Xu Ao , Tao Zhan
Published: March 2021

Neural network is widely used as a behavioral model of power amplifier (PA) for its high flexibility and nonlinear fitting ability. This paper presents a novel simplified neural network (SNN) PA behavioral model. By employing an input classifier, the proposed SNN model reduces the number of input data needed for training the neural network, while achieving the same modeling accuracy in comparison to the already published neural network PA models. Simulation results show that the proposed model significantly reduces the computational load of PA modeling.
Emotion Recognition of Single-electrode EEG based on Multi-feature Combination in Time-frequency Domain
Authors: Cao Xiang , Zhao Kunyuan , Xu Dan
Published: March 2021

Most researches on EEG emotion recognition are based on multi-electrode EEG signal acquisition equipment. There are few studies on single-electrode EEG equipment and the classification accuracy obtained is not ideal. In order to further improve the classification accuracy, the paper proposes an EEG emotion recognition method based on the combination of multiple features in the time-frequency domain. Firstly, the wavelet transform is used to decompose the EEG signals under the three types of emotion labels and extracts the time-frequency information of four frequency bands, including alpha, low beta, high beta, and gamma, and then uses different sizes of sliding time windows to calculate separately their statistical characteristics in the time-frequency domain. Finally, the Long Short-Term Memory (LSTM) network with time-frequency domain characteristics is used to extract the sequence information of the deep features and combine the output results of the softmax classifier. The results of experiments show that the average accuracy of the proposed method is 93.09% and 98.36% on emotion food and emotion state dataset, respectively. Compared with traditional machine learning methods and other deep learning methods, the time-frequency LSTM model named TF-LSTM in this paper has better EEG generalization ability and classification performance, and also provides a new feasible scheme for emotion recognition research based on single-electrode EEG signal.