bluuebunny/crossref_metadata_2025_split huggingface dataset:
Practicality of E-Learning as Learning Media in Digital Simulation Subjects at Vocational School in Padang
Authors: Fransisca Monica , Yunus Yuliawati , Dewi Sutiasih Aminda , Permata Saputri Renny 
Published: December 2019

Abstract
This development research produces learning media in the form of E-Learning which is applied to digital simulation subjects at Vocational School in Padang. This E-Learning could improved student learning outcomes on digital simulation subjects. Research and Development (R and D) was used as research methods with Four-D development procedures (Define, Design, Develop, and Disseminate). The type of data that used in this research was primary data. This research used descriptive data analysis techniques by describing the practicality of E-Learning as learning media. The results obtained from this research was the results of the practicality test E-Learning as learning media which are based on the responses of teachers and students in digital simulation learning. The practicality test result shows that E-Learning as learning media has high practical value. Based on the result of the research it can be concluded that E-Learning as learning media is practical for use by teachers and students.
Startup Learning Path (SLP): A Learning Model for Startup Employees Using Agile Learning Approach
Authors: Endeska Putra Egi , Ferdiana Ridi , Hartanto Rudy 
Published: December 2019

Abstract
The growth rate of startup numbers in Indonesia is very high due to the increase of people interest in the technology utilization, particularly Smartphone. However, more than 75% startup that has been increasing has experienced the failure. This is related to many factors, one of which is the lack of qualified Human Resources. This research aims to propose a learning model called Startup Learning Path (SLP), designed using agile methodology approach to be an alternative that can be used by startup to increase the quality of the employees’ competence in supporting the startup to realize the vision and mission.
Designing Lectora Based Interactive CD Learning Media in Basic Programming Subjects (Case Study of Class X SMKN 2 Padang)
Authors: Wijaya Indra , Sefriani Rini , Menrisal  , Radyuli Popi , Andrayani Lili 
Published: December 2019

Abstract
This research and development aims to produce products in the form of Interactive Media CDs for students of class X majoring in software engineering at Padang State Vocational High School 2 based on the lectora inspire application. The research method used is the method of research and development, using the ADDIE development model. The development steps are: (1) Analysis, (2) Design, (3) Development, (4) Implement, (5) Evaluate. Product development validation includes. The results of the assessment by experts in terms of the aspect of content eligibility: 71.00%, language component: 71.25%, presentation component: 71.00%, graphical component: 71.25%. Overall, the validator test evaluation of the Basic Programming Interactive CD Media is 71.13%, so that the level of validity can be interpreted Fairly Valid to be used. The results of the practicality test assessment in terms of the user state: 80.11%, the effectiveness of learning time: 79.60%, benefits: 80.90%. Overall, the practicality assessment of the Basic Programming Interactive CD Media is 80.20%, so that the practical level can be interpreted as practically used. The results of the effectiveness test were reviewed from the aspect of learning pleasure: 79.08%, the presence of interesting teaching materials in learning: 71.50%. Overall, the assessment of the effectiveness.
Analysis System Occupational Health And Safety in coal Underground
Authors: Prabowo H , Prengki I , Amran A 
Published: December 2019

Abstract
Based on the data obtained from the company, the data of occupational accidents that occurred between the years 2016-2017 there were 10 cases of accidents. The causes of such employees ignore APD, buffering systems which do not conform to the rules, and a ventilation system that is still not good. The purpose of this study were: 1) Uncover Management System Occupational Health and Safety are available on the company today. 2) Uncover buffering system underground mining CV. Karya Maju Sejati 3) Uncover the ventilation system underground mining CV. Karya Maju Sejati 4). Revealing how the protection of electrical equipment in underground mines. 5) Find a solution should be done to reduce the risk of accidents at work in the company and measures of prevention/mitigation of hazards in the workplace. Data collected or obtained directly from respondents by direct observation in the field and interviews with management and staff as well as competent employees of the company and nothing to do with the object of research. The data taken is the danger in the workplace environment, work program K3 management, implementation and support of ventilation systems and protection of electrical equipment in underground mines., t.
Wayang beber animation media as an effort for preserving wayang tradition based on information and technology
Authors: Prilosadoso B H , Pujiono B , Supeni S , Setyawan B W 
Published: December 2019

Abstract
The aim of this study is to develop wayang beber animation media that used as a means to preserve the tradition of wayang beber Pacitan. This study was developmental research that consists of 5 phases, including problem identification, planning, design and development, stabilization, and dissemination. The data were stories and pictures of wayang beber, obtained through filed observation and interviewing informants, namely dalang (puppeteers) and expert in animation. Data validity was tested through data triangulation techniques, including source of data and theory. The result of this study produces wayang beber animation media that is disseminated to several government institutions, namely office for culture and tourism, elementary schools, junior high schools and senior high schools in Pacitan District. The existence of wayang beber animation media will supposedly be utilized as a media for introducing wayang beber to community and students in Pacitan District.
Media Development on the Concept Sentence Learning Model based Android for Students with Hearing Impairment
Authors: Mirasandi I P , Akhyar M , Widyastono H 
Published: December 2019

Abstract
This study aims to find out development of android based learning media that adopts the Concept Sentence model for students with hearing impairment, so that their learning outcomes, especially in understanding a social science’s learning materials would increase. The subjects of the study were 30 students from one of the special schools for students with hearing impairment in Surakarta City. The present study was conducted using a research and development method. The data were collected using a questionnaire while Miles and Huberman model of Analysis was employed for the data analysis. The results show that most of the students consider that they had difficulty in understanding the board material of social science, due to the inadequateness of the previous media. The students need a media that come with the required competence to be achieved, clearly and briefly delivered using words and punctuations that can be easily understood by the students. The students wish for an interesting media display and most of them assent on the use of “Belajar IPS itu Asyik dan Menyenangkan” as the title on the learning media’s homepage.
Video as Educational Multimedia to Teach English Speaking
Authors: Fajar Masyitoh Novia , Malihah Noor , Risdianto Faizal , Guritno Agung 
Published: December 2019

Abstract
The aim of this research is to develop an educational multimedia in the form of video as one of media to teach speaking. Research and development design is used to produce an educational multimedia entitled Nginggris Narsis. Procedures of this research includes identification students and teachers need, planning and product design, product small scale tryout, validation of the expert, product revision, product large scale try out and revision, and dissemination. This video is used to teach the first grade students of Junior High School in Indonesia of which curriculum implemented is 2013 curriculum. The results show that NginggrisNarsis is an appropriate material to teach EFL learners in speaking, although there are still some weaknesses found within this video. Nginggris Narsis as educational media to teach speaking help both teachers and students in introducing English as a foreign language for Indonesian students.
Development of e-learning mathematics encyclopedia as learning tools for class viii junior high school
Authors: Dwi Agustin Ririn , Ambarawati Mika 
Published: December 2019

Abstract
The purpose of this study was to describe the development of e-learning-based mathematics encyclopedia as a learning tools and test the validity and eligibility of e-learning based mathematics encyclopedia as a learning tools for junior high school students. The many terms and formulas in mathematics, sometimes make students difficult in learning mathematics. Students often forget to apply a formula to solve certain math problems. To help students in learning mathematics, it is necessary to make a computer software (software) through computer-based learning in the form of a mathematical encyclopedia. The development of e-learning based mathematics encyclopedia that is integrated into learning can be through the development of learning tools. This learning tools can be applied in all devices based online. The use of tools in learning is intended to be able to help overcome various obstacles in the learning process including psychological barriers, physical barriers, cultural barriers and environmental barriers. This research is a development research. In genera, this research will be implemented in three stages, namely: define, design, and develop. The define phase includes the analysis of encyclopedia; the design stage includes the preparation of draft encyclopedia. This research conducted in grade VIII Junior High School. The validation results of expert validators are as follows: encyclopedia with a value of 3, 80 with a worthy category. And the advisability result of students who get value of 3, 95 with a worthy category.
Calculation and analysis of the features temperature behavior of the electrical conductivity semiconductors GeTe and SnTe near structural phase transition TC
Authors: Sankin A , Altukhov V , Mitjugova O , Janukjan E 
Published: December 2019

Abstract
In the article have conducted of the calculation for the temperature behavior of anomalous conductivity of ferroelectric-semiconductors type A4B6 (SnTe and GeTe) near the phase transitions of Tc. The proposed integrated (analytical) model is applicable both to describe temperature behavior of conductivity many-valleys semiconductors GeTe, and type systems the SnTe. Made investigation of the influence of structural phase transition on the conductivity of these systems. The results of the calculations are consistent with data of those experiments.
Magnetotransport phenomena and spin accumulation in MIS structures
Authors: Volkov N V , Bondarev I A , Tarasov A S , Rautskii M V , Lukyanenko A V , Smolyakov D A , Varnakov S N , Ovchinnikov S G 
Published: December 2019

Abstract
The present work is devoted to magnetic transport in Fe/SiO2/p-Si, Mn/SiO2/p-Si and Fe3Si/p-Si hybrid structure. For Mn/SiO2/p-Si diode extremely large values of magnetoresistance were observed (105 % for AC and 107 % for DC) which is explained by impact ionization process that can be suppressed by the magnetic field. Lateral photovoltaic effect in Fe/SiO2/p-Si have also shown a strong dependence on the magnetic field in low-temperature region (the relative change of photovoltage exceeded 103 %). In Fe3Si/p-Si spin accumulation was found via 3-terminal Hanle measurements. We believe that the magnetic field affects electric transport through Lorentz force and through the interface states which are localized at the insulator/semiconductor or metal/semiconductor interfaces. Such states play a decisive role in magnetotrasnport as their energy can be controlled by a magnetic field. In Fe3Si/p-Si they also participate in spin-dependent tunneling, causing spin injection from the Fe3Si film into the silicon.
Optimization of the functional properties in solid-state sulfide materials with the sulfur ion conductivity
Authors: Kalinina L A , Ushakova J N , Pentin M A , Kosheleva E V , Murin I V 
Published: December 2019

Abstract
Possibility of increasing the main functional property, the electrical conductivity in the known solid ionic salts with the conductivity of sulfur ions, by preparing composite mixtures with a semiconductor dopant is considered. The sulfide semi-product BaSm2S4 has been synthesized by using ceramic and chemical technology, as well as dopant ZrS2 and composite mixtures (100–x)BaSm2S4-x mol.% ZrS2 in a wide range of compositions. The study of the morphology and phase composition in the composite mixtures has revealed an ambiguous nature of the phase formation. Influence of the method for obtaining the oxide precursor on the electrical conductivity of a metacomposite based on barium thiosamarate has been investigated. The best compositional effect is achieved for metacomposites with ceramic prehistory. It is noted that in the resulting heterogeneous mixture, the sulfidic nature of the ionic salt conductivity is preserved.
PLD of thin electrochromic WO3 films at room temperature
Authors: Parshina L S , Novodvorsky O A , Khramova O D 
Published: December 2019

Abstract
The amorphous dielectric WO3films have been obtained by the droplet-free pulsed laser deposition method on the quartz and c-sapphire substrates at room temperature and the oxygen pressure from 20 to 60 mTorr. The dependence of the parameters of the obtained films on the oxygen pressure during the growth has been established. The transmission of the WO3 films increases over the whole region under study from 200 to 1000 nm with increase of the oxygen pressure in the process of the film growth on the substrates of both types. The surface roughness of the films poorly depended on the oxygen pressure during the film deposition and was 4-5 nm. The thin-film electrochromic cell with a liquid electrolyte was produced on the basis of the obtained WO3 film. The cell transmission over the spectrum range from 300 to 900 nm is reduced by 30% at a voltage of 2.5 V during the staining time of the order of two minutes.
The current state of the use materials with shape memory effect in the oil and gas and related industries
Authors: Elagina O Yu , Vyshegorodtseva G I , Dubinov Yu S , Dubinova O B 
Published: December 2019

Abstract
This paper discusses the use of materials with shape memory in various industries, including the oil and gas industry. The advantages and disadvantages of metallic and non-metallic materials with shape memory are presented. The possibilities of using composite materials with shape memory in the oil and gas industry are considered. The use of composite materials for the manufacture of diaphragms in diaphragm pumps to increase the energy efficiency of equipment is proposed.
Spectral study of humic substance extract from pressurized oxidizing slag of Carlin-typed gold deposit
Authors: Niu Huiqun , Yang Hongying , Tong Linlin , Zhong Shuiping , Liu Yuanyuan 
Published: December 2019

Abstract
Carbonaceous matters in Carlin-type gold deposit, especially the humic substance, which have a serious preg-robbing effect on the process of cyanidation. In this paper, the humic acid and fulvic acid were extracted from oxidizing slag via pre-activation alkaline-heat method, and using FTIR and UV-Vis spectra to study the molecular structure of humic acid extract and fulvic acid extract. The FITR spectrum demonstrated that hydroxyl, carboxyl and benzene rings characteristic stretching vibration peaks occurred in spectra of humic acid and fulvic acid, but humic acid extract had a finer molecular structure. The result of UV-Vis spectra analysis showed that the extract contained alkyl-substituted benzene ring structure, and the amount of carboxyl groups and hydroxyl groups in fulvic acid molecule was larger than that of humic acid. The fulvic acid extract contained more chromophores, while humic acid molecules have a higher degree of humification and a higher average molecular weight. Although there were some differences in the molecular structure of the both, they were both complex macromolecular organic compounds with a benzene ring as a basic unit.
Structure and magnetic properties of mechanochemically synthesized UHMWPE/ferrite composites as precursors for electromagnetic shielding materials
Authors: Kiseleva T Yu , Ilyushin A S , Lazareva E V , Ivanenko I P , Yakuta E V , Khakhalin A V , Zholudev S I , Kovaleva S A , Devyatkina E T , Grigoryeva T F , Frolov K V , Markov G P , Enhnaran U , Sangaa D 
Published: December 2019

Abstract
In this paper, a study of composite materials based on ultrahigh molecular weight polyethylene (UHMWPE) and magnesium ferrite particles — precursors for electromagnetic shielding materials was carried out. Scanning electron microscopy, X-ray diffraction, Mossbauer and FTIR spectroscopy have been applied to study the influence of structural, morphological and magnetic state of ferrite particles on the composite polymer materials formed by the method of mechanochemical activation in mixtures of ferrites with UHMWPE. It was revealed that synthesis method type showed a significant effect on the size, morphology, crystal structure (inversion parameter) and magnetic properties of ferrite particles. All of these studied parameters determine their functional properties as an independent material, and their properties in the composition of the functional polymer composite material.
Quantum dots in the structure of quasicrystalline systems
Authors: Melnikov G A , Ignatenko N M , Gromkov A S 
Published: December 2019

Abstract
The article shows that in the structure of quasicrystalline systems it is possible the formation of quantum dots, which are potential wells of various forms with quantized motion of an electron or proton, which allowed us to put forward the hypothesis of the existence of a constant component in the infrared radiation of the moon surface.
Unusual properties and features of oxygen nonstoichiometry of La-Sr manganites with manganese replacement by a combination of nickel and germanium
Authors: Karpasyuk V K , Badelin A G , Merkulov D I , Derzhavin I M , Estemirova S Kh 
Published: December 2019

Abstract
When studying manganites of the system La1-cSrcMn1-x(Ni2+
0.5Ge4+
0.5)xO3+γ (x = 0.05; 0.10; 0.15; 0.15 ⩽ c ⩽ 0.35), it was experimentally established that after reductive annealing, which leads the oxygen content to the stoichiometric one, unit cell volume (v) of the samples decreases and at c ⩾ 0.19 it is less than after annealing in oxygen. Based on the analysis of various charge compensation mechanisms using derived dependences of v on the oxygen content and taking into account the changes in magnetic and electrical parameters, it is established that experimental data can be explained only with the allowance for formation of singly charged oxygen ions. The relationships between magnetic parameters of the manganites and their composition, structural characteristics and deviations from oxygen stoichiometry are explained. The possibility of local ferromagnetic ordering of uncompensated spins of Ni2+ ions due to their interaction with singly charged O–
anions is considered.
The critical currents of MgB2 tapes after the shock-wave plasma influence through the protective screens with different thermal characteristics
Authors: Mikhailov B P , Mikhailova A B , Nikulin V Ya , Borovitskaya I V , Silin P V 
Published: December 2019

Abstract
The report presents the researches of the current-carrying characteristics of MgB2 tapes after exposure to shock-wave action through the protective screens with different thermal characteristics. It was used molybdenum, titanium, iron and copper. To implement the shock wave impact, a plasma focus (PF) type setup was used. Current-voltage characteristics (CVC) of the tapes in the initial state and after shock-wave action (SW) through the protective screens are presented. Dependences of critical currents from magnetic field value are measured in the transverse magnetic fields from 0.3 to 6.0 T at the temperature of 4.2 K. The studies performed showed a noticeable change in the critical currents according to the screens material used. The largest increase in Jc (more than 2 times up to 850 A in transverse and longitudinal magnetic fields up to 1 T) was achieved in case of titanium screen.
Design of composite members with curvilinear fiber trajectories
Authors: Polilov Alexander N , Tatus Nikolay A , Tian Xiaoyong , Hao Liu 
Published: December 2019

Abstract
The design possibility of shaped constant area composite tensile test specimen and leaf spring is shown and the last can provide by chosen geometry threefold mass reduction for the given level of stored elastic energy. The use of unidirectional GFRP (glass fiber reinforced plastic) makes it possible to reduce the mass by approximately 15 times in compare with the steel analog for the same strength and stored energy requirements. The curvilinear trajectories of fibers tracing around the hole or rivet/bolt connection make it possible to increase load carry capacity many times.
Enhanced mechanical properties and wear resistance of 2024Al alloy with CeO2 addition
Authors: Lv Zheng , Liang Qiushi , Mao Changhui , Yang Zhimin , Yang Jian , Dai He 
Published: December 2019

Abstract
In this work, a study of the mechanical properties and wear resistance of CeO2 reinforced 2024Al matrix composites have been performed using servohydraulic universal testing machine and ball-on-disk wear system. The composites were fabricated through powder sintering and hot extrusion followed by T4 heat treatment. Matrix of pure 2024Al was used to which different mass fractions (0.2%, 0.5%, 1.5%, 2.5% and 4.0%) of CeO2 were added. Tensile tests were performed at room temperature and velocity of 2.0 mm/min. As the CeO2 content increased, mechanical properties were firstly increased and then decreased. The UTS, YS and elongation reached maximum values at 0.5 mass.% CeO2 addition, which were increased by 11.6%, 13.3% and 20.7% as compared to those of pure 2024Al alloy, respectively. While, wear tests were carried out under loads of 5-20 N with sliding velocity of 0.05 m/s for 60 min. For 0.5 mass.% CeO2/2024Al, the decrements in volume loss and average COF and maximum COF under load of 10 N were 48.0% and 35.3% and 8.1% respectively as compared with pure 2024Al, and the decrements in volume loss and average COF and maximum COF under load of 20 N were 34.0% and 2.3% and 8.9% respectively as compared with pure 2024Al. Therefore, both mechanical properties and wear resistance of 2024Al alloy were markedly enhanced through trace CeO2 addition.
Effect of carbon and manganese contents on intra-granular acicular ferrite nucleation in steel containing nanoparticles
Authors: Gao Xiangzhou , Du Kaiping 
Published: December 2019

Abstract
In the present study, the experimental steels containing nanoparticles were manufactured under different mass fractions of C and Mn. A systematic analysis of inclusion characteristics, Intra-granular acicular ferrites (IAF) inducing potency of active inclusions, and microstructure morphologies revealed that Al2O3-MgO had the largest number fraction with higher inducement ratios than other inclusions. Steel samples containing 0.21wt% C contained the largest share of fine acicular ferrite (AF) than other samples due to relatively stronger inducing potency of active inclusions on IAF. On the other hand, the underlying microstructures in steel samples with Mn content less than 0.6wt% were due to weaker inducing potencies of active inclusions on IAF.