bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improving useful life of assembled cutting tools by designing a modified flank geometry in indexable cutting inserts
Authors: Mikhailov S , Kovelenov N 
Published: February 2021

Abstract
An innovative approach is proposed to increase the useful life of assembled cutting tools by designing a special shape of the flank surface of indexable faceted cutting inserts (IFCIs). Calculation relationships were developed as a way to define the nature and degree of effect of blade geometry on the flank wear rate. The paper describes specifics of designing the optimal flank shape for roughing and finishing operations. Curved (convex) flank geometry is confirmed to effectively increase the tool life before reaching the maximum allowed flank wear land. An important factor for choosing the insert flank geometry and dimensions is the strength of the cutting blade of the insert. To maximize tool life with regard to the insert strength, a CAD method is developed for geometry calculation and optimization of the complex-profile flank surface. IFCI design examples featuring modified flank geometry offer improved tool life. Complex flank shape comprising a series of elementary surfaces with different geometry, is shown to be highly efficient. The results of field tests for new IFCIs in milling operations confirm the great practical value of methods for controlling the tool wear behavior through modified flank geometry.
Time-Frequency Feature-Based Underwater Target Detection with Deep Neural Network in Shallow Sea
Authors: Zheng Yunliang , Gong Qiyong , Zhang Shufang 
Published: February 2021

Abstract
In this paper, we propose a time-frequency feature-based signal detection method with deep neural network and apply it for target detection in shallow sea. The short time Fourier transform is employed to capture the time-frequency feature of the target signal. We input the time-frequency diagram of the signal into the deep neural network model, train the network model through the labeled data samples, and use the test set to estimate the signal detection probability. In addition, we analyze the influence of different learning rates on the detection performance. The experimental results show that the performance of the proposed method is better than that of the energy detector, and the detection performance of different learning rates is different.
A Novel Approach of Intermittent Demand Prediction in Industrial Domain
Authors: Hu Xiaolei , Zhang Xue , Zhang Dai 
Published: February 2021

Abstract
Intermittent demand, one of the categories of unusual demand, such as demand of spare parts of industry equipment management, seasonal and short life cycle products, is characterized by infrequent demand arrivals and variable demand sizes, which is difficult to predict. To solve this problem, a novel approach was proposed in this paper to predict intermittent demand. It provided mechanism to forecast demand arrival time with demand values at the same time when demand occurs. It firstly applied Decision Tree to predict a 0-1 binary values of demand arrival time. Meanwhile Neural Network was built to predict demand values. Then the time points of these two results were matched. The demand values for those moments when predicted demand that did not occur were replaced by zero. Finally we applied this approach to predict sparse demand of products, the results showed that the predicting accuracy was superior to traditional Back-propagation Neural Network through comparison.
Heterotrophic Bacteria from the Digestive Tract of Rice Field Eel (Monopterus albus) and Its Potency as Probiotic
Authors: Faturrahman  , Khair W H , Andini A S 
Published: February 2021

Abstract
Normal microbiota in the gastrointestinal tract has a mutual relationship with its host. This research aimed to know the morphological diversity of heterotrophic bacteria that live in the gastrointestinal tract of rice field eel and its potency as probiotic. Bacterial isolation has been done by cultivated of the sample in the nutrient agar medium and then observed colonies and cell morphology. Candidate probiotics of isolates were selected based on the capability of starch, protein and lipid hydrolysis, bacterial resistance to acidity and bacterial resistance to antibiotics. The result of this research showed there are 10 isolates and have various colonies’ morphological appearance. All of those isolates consist of 40% cocci, 30% small rod and each 10% long rod, streptococci, and spiral. As many as 8 isolates were gram-positive and 2 isolates was gram-negative. The motility test showed 70% of isolates were motile and 30 % non-motile. The results of casein hydrolysis, starch, and fate indicate that 70% of isolates were able to obtain Hydrolyze casein, that 60% of isolates were able to hydrolyze starch and that none of the isolates were able to obtain hydrolyzed fats. All of the probiotic candidates who were tested in isolation are resistant to all antibiotics tested. Thus, it said that not all discoveries meet the criteria as potential candidates.
Development of 3D Animation Based Hydrocarbon Learning Media
Authors: Zakir Supratman , Maiyana Efmi , Nur Khomarudin Agus , Novita Rina , Deurama Mayuti 
Published: February 2021

Abstract

The learning process of chemistry on the hydrocarbon compound material taught by the teacher currently uses 2D-based media (blackboard). Actually, there is nothing wrong with using this blackboard for teachers in teaching, but there are some materials that need to be explained more concretely through direct media or IT-based media. In addition, students also do not understand the learning being taught because there are no facilities for practice so that students still use their imagination in practical learning. From the information obtained through interviews with chemistry teachers, the teacher’s desire to make IT-based media is very high, but they are constrained by the ability to design it. The research method used is the 4D version of Research and Development (RnD) (Define, Design, Develop, Disseminate). The results showed that the products produced were valid, practical, and effective for use as a medium in learning hydrocarbons with the respective values of validity, practicality and effectiveness were 0.83, 0.92, and 0.94.
Web-based e-learning Application for learning Arabic language
Authors: Zubaidah  , kardena Absharini , Shalihah Siti , Hodijah Ooh , Afrida Yeni , Safitri Loli 
Published: February 2021

Abstract
In today’s digital era, there are still many lecturers who conduct face-to-face meeting using the lecture strategy and using projectors and/or laptops as learning media. This educational model, although using multi-media, still has shortcomings because the interactions that occur during the educational process are limited on two-way interactions between lecturers and students. Learning tends to focus on the lecturer. In addition, learning faces obstacles when lecturers have to leave class because of other jobs outside the city or outside the island and even abroad. This traditional learning model also does not give students the opportunity to learn freely and independently. By considering this fact, the development of an ICT-based education system in a broader sense is urgently needed. It aims to overcome various problems and learning limitations. E-Learning system is an alternative solution to various problems. One of the e-Learning systems which based on computer technology is the use of website. The use of Website in the learning process provides opportunities for students to access learning material at any time and repeatedly so that the students can improve their mastery of learning material. Thus, the presence of lecturers is optional or even non-existent. This is because the parties who take on the role of lecturers are computers, electronic guides designed by content writers, e-Learning Designers, and computer programmers. This article offers website-based learning for Arabic language education study programs that can be used as a substitute for face-to-face learning (online learning).
Development of Learning Media for Android-Based Budget Accounting
Authors: Husrizal Syah Dedy , Muda Iskandar , Elidawati  , Abu Bakar Erwin 
Published: February 2021

Abstract
The purpose of this paper is to develop learning media for Android-based Budget Accounting; and testing the feasibility of learning media developed based on validation or assessment from media experts and students. Media feasibility validation was conducted by the learning technology lecturer and was tested on 50 students at the Accounting Study Program of one of the campuses in North Sumatera. In broad outline, the results of the validation of the media from the material and media aspects were classified as Very Feasible (VF) that is 89.06% and 89.88%, as well as the results of the validation of student trials from aspects of validity of concept, material preparation and implementation potential are Very Feasible (VF), that is 85.12%, 87.90% and 81.55%. The learning media products that are produced are files in the android package (apk) format.
The Role of ICT-Based Metacognition Against the Capabilities of Student Statistics in the Industrial Age 4.0
Authors: Rusmini  , Irawan Saragih Doni , Sari Wahyuni Harahap Fitrah , Fitri Yulia 
Published: February 2021

Abstract
The ability of statistics is the knowledge base of statistical reasoning and statistical thinking. The ability of Statistics can be improved by increasing the role of student metacognition. In the industrial era 4.0, one way to optimize students’ metacognition skills is to get used to solving complex problems with ICT-based. Optimal statistical ability will contribute to the habit of self to work systematically and scientifically. So that this attitude is a capital for students facing the Industrial era 4.0. The method used is a qualitative method. In the Intervention applying statistics learning by developing ICT-based statistics module to increase the role of metacognition in improving the statistical abilities of students of Medan Potensi Utama University. Samples, taken as many as two classes, namely the control class and randomized experiment. Based on the results of the first trial in the field, the results show that the ability of metacognition has a significant effect on the ability of student statistics. student statistics. Students also show a positive response to ICT-based learning in the classroom.
The Factor Analysis of Online Learning Barriers on Learning Evaluation Course During Covid 19 Pandemic
Authors: Syafril  , Novrianti  
Published: February 2021

Abstract
In covid 19 pandemic, since march UNP through UNP rector circular letter no 1593/UN35/AK/2020 obligates the practise of online learning using UNP platform. This decision surely becomes one barrier for some parties in the term of practise. Lecturer readiness in preparing the design of right message for online learning is main point. Even though the socialization related to the design of message in online learning has been long implemented, but it is not fully practised, it becomes particular burden for lecturer. This barrier can be seen from the utilization of synchronous which is not utilized yet, as result some of lecturer are still practising e-learning like face to face lecture i.e same time lecture. It emerges barrier for students. Based on the result of analysis done from the shared questionnaire, the dominant barriers perceived by the students is the readiness of material which is minimum which are available on e-learning, such as e-book, e-module, and the right recommended of e-resources. One thing that must be prepared by university in preparing digital material from various courses is motivating the lecturer to produce the sources of digital (Shurygin, V. Y., &Krasnova, L. A. (2016)). Network aspect and technical problems is aspect which is improvement in the institution which is compulsory to be able to do fast improvement in line with 4,0 revolution era which require the high adoption level on e-resources digital literacy.
Students’ Morphological Errors in Using Word Formation in Writing an Essay
Authors: Dyuli Adha Annisha , Dania Rahma 
Published: February 2021

Abstract
This research was aimed to find out students’ morphological errors in using word formation in writing an essay. Word formation that was found in the students’ writing are derivation and inflection. The type of this research was descriptive qualitative research. The source of data was the English Department students of Universitas Putra Indonesia Yayasan Perguruan Tinggi Komputer ( UPI YPTK) Padang who were in the fourth semester that consist of 23 students. The data were gotten through writing test. The finding of this research showed that the students made morphological errors in using derivation and inflection in writing the essay. Errors in derivation were 10 data, while errors in inflection were 83 data. Based on those findings, the students still made errors in using word formation in their writing.
Guttmann scale Method for Analyze Emotional Intelligence and Speaking Achievement Between Students’
Authors: Wulan Sari Adek , Roza Veni 
Published: February 2021

Abstract
The research was done because there is a significant factor in supporting language learning and academic achievement. That factor was emotional intelligence. Additionally, in language learning process, social. and personal skills are. necessary. As a result, the researcher needed to find and to search about emotional intelligence of the. students. and their speaking achievement. This research was conducted in SMKN 1 Baso at the tenth grade in academic.years of 2019/2020. This research. was a correlational research .as its design. The instruments of this .research were questionnaire .for measuring emotional intelligence and documentation for collecting speaking score of the students. It was all of the tenth grade students of SMKN 1 Baso as the population which consists of 7 classes. The sample was 47 students taken by purposive sampling technique. After that, the researcher has .used Pearson .Product Moment Correlation .Coefficient to search and to find the correlation. between two variables. The researcher.has gotten that the coefficient .of relationship .between. Emotional intelligence of the students and their speaking achievement was 0.48. Based on the result of the research, it can be concluded that emotional intelligence has positive contribution in speaking achievement. The meaning of positive symbol was if the students were intelligent in emotional, they also became intelligent in speaking.
Designing E-Training Computer Assisted Instruction Used to Pedagogic Competency in Vocational Education
Authors: Syahmaidi Eril , Hidayat Hendra , Hartanto Suryo , Fitri Rahmadani Ade 
Published: February 2021

Abstract
This study aims to make the syntax of e-training models valid, practical, and effective on pedagogical competencies. Computer-based training is an e-training model that suits students’ desires in developing pedagogical competencies to get quality graduates. The research method used is Research and Development by conducting expert validity tests with Focus Group Discussion (FGD) and limited trials of the e-training model. The results of this study are formed in the syntax of the e-training model which consists of; (1) Preparation Phase includes Planning, Training Program, and Training Program Preparation; (2) Implementation Phase including E-Training, Face-to-Face, Discussion, Demonstration; (3) The evaluation phase includes Input, Process, Output, and Impact. Finally, implementing the e-training model can help prospective educators prepare to enter into vocational teacher candidates. The results are expected to meet the needs of vocational teacher candidates who have pedagogical competencies that influence the vocational students’ influence.
Indonesian Course in Covid-19 Pandemic Period With A Line Application System
Authors: Deswalantri  
Published: February 2021

Abstract
Indonesian language lectures during the Covid-19 pandemic experienced many obstacles and conveniences that were not obtained during face-to-face lectures. The convenience includes that students are not bothered with attendance, which begins with a lecture contract, which becomes one of the assessments. Students are more flexible in communicating with peers and lecturers without being limited by time and place. Recovery often takes place beyond a predetermined time limit. Obstacles that were found, such as the frequently missing internet signal, arose, especially for students who lived far away near hills or mountains and ate a large quota. But students still miss face-to-face lectures.
The Evaluation of Online Learning in Micro Teaching Course in Tarbiyah and Teacher Training Faculty IAIN Bukittinggi
Authors: Iswantir M , Sesmiarni Zulfani 
Published: February 2021

Abstract
This research is based on the existence of Covid 19 Outbreak, which forced face-to-face learning process changes into online. The change of lecture model from offline to online demands the mastery of technology. The evaluation model of online learning in micro teaching courses used Kirkpatrick evaluation model, which use four evaluation steps; reaction, learning, behavior, and result. The limitation of research problem was evaluation of online learning program in micro teaching course. The formulation of problem was how big the degree of additional and change of students’ knowledge after following online learning in micro teaching course. The aims of research was how big the degree of online learning in micro teaching course. The kind of research was evaluation research used Kirkpatrick evaluation model by using 4 evaluation steps; reaction, learning, behavior and result. The population was students who take micro teaching courses total of 575. Sampling techniques was accidental sampling, 450 people. The technique of data gathering used questionnaire by analyzing data using quantitative non-statistical analysis. The result of research are (1) 40,56 % students mentioned they were satisfied to the implementation of online micro teaching, (2) 32,1 % students stated there is increasing of the additional of knowledge, skill and change of students’ attitude after following micro teaching. (3) 49,33% students tell there is quite increasing on the change of students’ behavior after returning to their circle, and (4) 40,65 % impact on the change of work behavior to students’ work productivity after following online micro teaching.
Academic Writing Learning Model in Higher Education Based on Hybrid Learning
Authors: Widyartono Didin 
Published: February 2021

Abstract
Abstract – Students must have academic writing competencies in order to express scientific ideas and attitudes through scientific papers. Therefore, learning activities are needed according to the times. Various information and communication technology devices can be used to access learning resources and materials. Learning activities can be presented by utilizing information and communication technology devices, including implementing online learning. Hybrid learning presents a variety of learning materials by utilizing the advantages of face to face meetings and online learning. The purpose of this study is to produce an academic writing learning model based on hybrid learning. The method used is development with the following research procedures: design, production, and product testing. The results were obtained by academic writing learning models in higher education based on hybrid learning.
Meta-assessment of student’s renewable energy projects
Authors: Nasrudin D , Setiawan A , Rusdiana D 
Published: February 2021

AbstractThe success of students in doing projects is determined through assessment. Lecturers make rubrics by the assignments given to students. Are arranged tasks and rubrics able to measure what is being measured? This paper aims to uncover the results of a meta-assessment of student projects on renewable energy. The method used is a systematic meta-analysis that is confirmed by self-evaluation, peer reviewers, and expert opinions on lesson plans, implementation, and evaluation. The results showed that the lesson plan that had been prepared was good, only needed improvement in the teaching materials. At the implementation stage, field monitoring and a daily journal are required. While in the evaluation aspect, the rubric that is used is still not enough to express all the categories and abilities displayed by students. Muti-method assessment is needed to measure student competencies and skills that are more holistic.
The Effectiveness of Cooperative Learning Model in the Type of Numbered Heads Together (NHT) Assisted with Picture Puzzle Media on Self-Efficacy and Student Learning Outcomes in the Coordination System Material
Authors: Sri Puji Retno A. , Khoiri Nur , Ihda Norra Bunga 
Published: February 2021

Abstract
The purpose of this study was to determine the effectiveness of cooperative learning model in the type of Numbered Heads Together (NHT) assisted with picture puzzle Media on self-efficacy and student learning outcomes. The research design used was quasi experimental design in the form of nonequivalent control group design. The sample of this study was class XI in SMA Al Islam Wirosari which was taken by non-probability sampling with the number of 77 students. The data were analyzed by using independent sample t-test, based on the result shows that: (1) The student’s self-efficacy score obtained t-count (3.890)> (5% = 1.665), then Ho is rejected and Ha Furthermore. The t-test results on students learning outcomes obtained t-count (3,357)> (5% = 1,665 ), then Ho is rejected and Ha is accepted. (2) Based on the results of the N-Gain test the self-efficacy score of the experimental class was 0.3 and included in the middle category, the control class was 0, 1 was included in the low category, while the N-Gain test result of students learning outcomes in the experimental class were 0.506 and it included in the middle category, in the control class of 0, 285, it included in the low category. This study concluded that the Numbered Heads Together (NHT) in cooperative learning model assisted with picture puzzle media is effective in self-efficacy and student learning outcomes in the coordination system material.
An Analysis of Questioning Skill in Elementary School Pre-service Teachers Based on Bloom’s Taxonomy
Authors: Rahmatih A N , Indraswati D , Gunawan G , Widodo A , Maulyda M A , Erfan M 
Published: February 2021

Abstract
Questioning is an important skill for students which reflects their critical thinking skills. It is also an indicator of creative thinking and even metacognition abilities. This study used Bloom’s Taxonomy to analyze students’ questioning skills. The purpose of this study was to look at the level of student questioning skills based on Bloom’s Taxonomy criteria. The number of questions classified in the factual category was 50% of the 114 questions made. Questions included in the conceptual category were 35%, the procedural category was 5%, while questions included in the metacognitive category were 10%. The conclusions are: (1) The quality of questions made by PGSD students is mostly in the factual cognitive category that requires answers with a low cognitive level; (2) Most questions are at the cognitive level of analyzing; (3) the ability of the research subject in converting information to questions is still at the basic level and the initial skills of HOTS (Higher Order Thinking Skills).