bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental studies of non-stationary thermo-hydraulic processes at freon R113 boiling
Authors: Milman O O , Ananyev P A , Korlyakova M O , Miloserdov V O
Published: December 2019

An experimental unit has been created to study the processes of boiling and condensation in a closed loop. Experimental studies of non-stationary thermo-hydraulic processes at freon R 113 boiling have been carried out inside tubes of low pressure natural circulation systems. Key factors have been identified affecting auto-oscillations characteristics: filling level of the loop, pressure, heat flux density, geometric characteristics of the evaporating elements. Four characteristic modes of operation of such units have been found out. Thermo-hydraulic auto-oscillations at high thermal loads have been studied. Process parameters and conditions under which there is no thermo-hydraulic instability have been determined. The phenomenon of thermo-hydraulic resonance has been detected. The influence of the heating method on the instability characteristics has been revealed.
Experimental study of condensation of dielectric liquid in microchannel heat exchanger
Authors: Shamirzaev A S , Kuznetsov V V
Published: December 2019

This study presents the results of an experimental investigation of the heat transfer under condensation of perfluorohexane inside the horizontal multi-microchannel system. The copper heat exchanger contains 21 rectangular microchannels with 335x930 μm cross-section. The heat from the condensing flow is rejected to a flow of water by Peltier modules. Experiments are performed in a range of mass fluxes from 90 to 200 kg/m2s and vapor qualities from 1 to 0. Obtained data set on heat transfer is compared with theoretical predictions.
Gradient heat flux measurement in study of unsteady water film boiling at the surface of the sphere
Authors: Sapozhnikov S Z , Mityakov V Yu , Subbotina V V
Published: December 2019

The new method of study heat transfer is the gradient heat flux measurement. It allows measuring the heat flux per unit area for unsteady film boiling at the spherical surface. For the first time distribution over the surface of heat flux per unit area and heat transfer coefficient were derived. The time dependences for the local heat flux per unit area and heat transfer coefficient were obtained in different angles of the spherical surface. The spherical surface was made of titanium VT 22 with a diameter of 20 mm. High-speed shooting supplemented the experimental curves with a frequency of 1 kHz. The error of heat flux per unit area measurement was not exceeding 12%.
The influence of Prandtl numbers of melts and crucible materials on the features of crystal growth by the Bridgman method
Authors: Berdnikov V S , Kislitsyn S A , Mitin K A
Published: December 2019

The processes of crystallization of silicon and heptadecan in flat-bottomed cylindrical crucibles in conjugate convective heat transfer regime were studied numerically by the finite element method. Crystallization of silicon was investigated in a graphite crucible. Crystallization of heptadecane was investigated in a Plexiglas crucible. The possibility of existence of two convective vortices over a solidification front during the crystallization of silicon and heptadecane has been discovered. Crystallization of heptadecane was studied at two rates of lowering the crucible into the cold zone. Lowering of the crucible was simulated by moving the breakpoint in the temperature distribution on the outer side of the crucible walls. The breakpoint was the boundary of transition from the wall area heated to the initial temperature to the area with a given temperature gradient. Adaptive grids on triangles tracking the position of the crystallization front at each time step were used. The software package of developed by the authors was used.
On the possibility to improve heat transfer of a sphere by natural convection and water mist
Authors: Abed A H , Klimova V. A. , Shcheklein S E , Pakhaluev V M
Published: December 2019

This paper aims to evaluate the effects of water mist on steady natural convection heat transfer from a sphere. Experimental investigations were performed for the Nusselt number (Nu) under a range of water mist concentration in both cases, sphere located in an open volume space with constant surrounding temperature and inside a cylindrical channel with sphere-to-channel diameter ratio (d/D=0.73). The results obtained from the related experimental work indicated that the heat transfer rate was enhanced over that for the single-phase air flow as a result of water mist evaporation on the heated surfaces. Compared to air cooling over a range of heat flux investigated, the percentage enhancement in the overall thermal factor was about 40%, 95.4%, 129.4%, and 156.8% respectively for all water mist concentration. In addition, an empirical correlation was also formulated to estimate the real benefits of using the water mist of the enhanced sphere.
Heat transfer in PCM based closed radiator heated from a source of variable power
Authors: Bondareva N S , Sheremet M A
Published: December 2019

In the present study, the numerical problem of heat and mass transfer in a closed copper radiator filled with n-octadecane heated from an energy source with an unsteady volumetric heat generation was considered. Governing equations in dimensionless nonprimitive variables “stream function – vorticity – temperature” describing conductive and convective heat and mass transfer processes taking into account the melting phenomenon were given. The evolution of temperature fields and the integral heat exchange coefficient at different heat release regimes was considered.
Experimental study of two-stage combustion of anthracite mining waste
Authors: Butakov E , Burdukov A
Published: December 2019

Here we consider the task of studying the flame burning of low-grade coals and their significantly ballasted waste with a low volatile yield and reactivity. It is shown that when reducing the quality of coal fuel, it is advisable to use two-step combustion methods with preliminary mechanochemical activation, which allows start-up of the boiler from a cold state without application of auxiliary fuels. The methods of mechanochemical activation have proven to be effective technologies for start-up of the boiler and maintaining the combustion of coals of different quality and technical composition. The developed technologies allow approaching the full-scale experimental-industrial implementation at thermal power plants. The two-stage system allows significant reduction in the cost of preparing micro-ground coal and number of start-up of the burners, since fuel from a standard boiler mill is supplied to the second stage with a different ratios, depending on the reaction properties of the fuel, i.e. it is possible to increase the power of a of start-up of the burner several times as compared with single-stage combustion.
Comparison of two numerical approaches for natural convection in cavities with energy sources
Authors: Gibanov N S , Miroshnichenko I V , Sheremet M A
Published: December 2019

A numerical investigation of two-dimensional natural convection in an enclosure with a local square energy source has been carried out. The presented problem has been solved by two numerical methods – first of all by the finite difference method using the non-primitive variables “stream function – vorticity” and by the lattice Boltzmann method. As a result the distributions of temperature fields and stream functions and also velocity fields have been obtained. A comparison of the obtained data and the evaluation of the effectiveness of methods for solving of this class of problems have been performed.
Influence of initial water temperature on the synthesis of gas hydrate by the method of explosive boiling liquefied hydrogen-forming gas freon 134a in the volume of water
Authors: Meleshkin A V , Glezer V V
Published: December 2019

The paper presents an experimental study of the influence of the initial temperature of water on the amount of gas transferred to gas hydrate. The studies were carried out at constant operating parameters, with varying water temperatures before decompression. This work is a continuation of the study of a method of synthesis of gas hydrates developed by the team of authors, based on the explosive boiling of liquefied hydrate-forming gas (Freon 134a) in a volume of water.
Experimental study of pine sawdust ignition in a vertical tube furnace
Authors: Kuznetsov A V , Butakov E B , Burdukov A P , Lomovskiy O I , Bychkov A L
Published: December 2019

The combustion processes of composite particles of powdered fuel from lignocellulose and coal have not been previously studied. It is planned that a non-obvious relationship will be established between the structure and properties of solid fuels obtained under various conditions of preliminary machining of individual fuel components and joint mechanochemical processing of fuel components before burning in the combustion chamber. Based on the data obtained, the description of both individual chemical and physical processes and complex mathematical models will be improved. In this paper, we investigate the influence of the structure and dimensions of a particles pine sawdust as one of the components of composite fuel on ignition and thermal decomposition.
Experimental study of heat exchange processes with variable operating modes of air heater-fan system
Authors: Mansurov R Sh
Published: December 2019

The variable modes of operation in the model heater-fan-room system were studied experimentally and analyzed. The relative excess heat is proposed as a dimensionless parameter in the analysis and rationing of experimental data. The analysis of its evolution was carried out with an abrupt change in the performance of the air heater and at a fixed fan performance; with an abrupt change in the performance of the fan and a fixed performance of the air heater. The regularities and main qualitative types of evolution of relative excess heat in the elements of the model system were revealed.
Thermal conductivity of cylindrical tanks for backup fuel of boiler rooms
Authors: Nemirovsky Y V , Mozgova A S
Published: December 2019

In this paper, the method of determining the level of heat losses through structures of a cylindrical tank for backup fuel of boiler rooms and steady-state non-uniform temperature distribution in a multilayer tank have been considered, given that the heat transfer coefficient depends on r and z coordinates.
Utilization of heat and power complex with a capacity of 1 MW
Authors: Milman O O , Shifrin B A , Kuzina L A , Perov V B
Published: December 2019

The results of a compact and mobile heat recovery plant design based on the organic Rankine cycle (ORC) with a capacity of 1 MW, which can meet the gas pumping station auxiliaries in power, are presented. The choice of n-pentane as a working fluid, as the cheapest and most affordable on the market and providing condensation of exhaust steam at the atmospheric pressure, and thermal oil ‘Thermolan LT’ as an intermediate heat carrier has been substantiated. The choice of the work process parameters is focused on reliable long-term work with a minimum amount of maintenance. The plant is designed with the possibility to place its main units outside the technological zone of the main production. The design of the plant main components is presented. The turbine is axial, with five stages with a direct generator drive without a reduction gear. The turbine and generator are placed in a ventilated container. The steam generator is a vertically placed shell-and-tube heat exchanger. The air condenser is with horizontally arranged heat exchange tubes and screw-knurled fins. The recuperator is a shell-and-tube heat exchanger with horizontally arranged longitudinally finned tubes. It has been substantiated that for low-potential heat sources and in the conditions of low air temperatures, the use of heat-recovery plants based on the ORC is the optimal solution.
Effect of electric field on oxide layer structure at zirconium oxidation in H2O, CO2 and H2O/CO2 supercritical fluids
Authors: Shishkin A V , Sokol M Ya , Vostrikov A A
Published: December 2019

Oxidation of zirconium plates in supercritical fluids H2O, CO2 and H2O/CO2 was studied at 823 K and 24–39 MPa. An experimental cell was a flat capacitor, where the zirconium plate acted as the anode and the copper plate of the same size was the cathode. The interelectrode gap was 2 mm. The experiments were carried out in the absence of electric field and in the electric field of 300 kV m−1. It has been found that in all cases the oxidized layer consists of two parts: the outer loose layer and the inner dense layer forming an interface with Zr. At oxidation in a medium containing H2O, there is non-uniformity in distribution of oxygen near the boundary region of the loose and dense layers. When Zr is oxidized in the H2O/CO2 mixture, zirconium carbonate is found on the surface. In the electric field, an average specific rate of an increase in the sample mass decreases linearly with an increase in the fraction of CO2 in the H2O/CO2 mixture, and without the electric field it increases. Apparently, the reason for this is formation and subsequent decomposition of zirconium carbonate, leading to additional destruction of the oxidized layer and accelerated oxidation. When Zr is oxidized in CO2 in the presence of the electric field, a 12-fold increase in the rate of zirconium oxidation is registered, and this is associated with an increase in the surface leakage current due to formation of amorphous carbon.
Aerodynamic structure of a swirling turbulent flow in a vortex furnace
Authors: Salomatov Vas V , Salomatov Vl V
Published: December 2019

Insufficient study of the swirling flow structure, stability of high-temperature circulating zones, intensity of fuel and oxidizer mixture formation and other determining phenomena in the vortex furnaces indicates insufficiency of scientific substantiation of the methods for their calculation. Therefore, further detailed studies of aerodynamics of a turbulent swirling flow in a vortex chamber with intersection of the main flow by the inlet tangential jets aimed at the development of promising combustion devices seem to be relevant. The results of numerical simulation of the turbulent swirling flow aerodynamics with preference given to the modern models of turbulence and numerical schemes of high-order approximation are presented.
Calculation of temperature oscillations in thermal layer of regular solids at unsteady coefficient of heat transfer
Authors: Supel’nyak M I
Published: December 2019

The temperature oscillations in thermal layer of regular solids, caused by periodic oscillations of the ambient temperature and heat transfer coefficient, are analysed. A halfspace, a plate, a space with cylindrical channel, a cylinder, a space with spherical cavity are considered as solids. Exact solutions of the corresponding cyclic problems of heat conduction in the complex and real forms of trigonometric Fourier series are obtained. Methods of simplified solution of heat conduction problem based on boundary condition modification are considered. Comparison of exact solutions with approximate ones is carried out and the admissibility of the proposed approximate solutions is shown.
Development of acoustic and diffuse mismatch models for predicting the Kapitza resistance
Authors: Khvesyuk V I , Liu B , Barinov A A
Published: December 2019

This paper is devoted to the acoustic mismatch model and diffusion mismatch model of Kapitza thermal resistance. We consider that diffusion in the transition layer can be represented by variable composition and finite thickness instead of previous assumptions of a “black box” approximation. The effect of heat flow on the interface is reviewed in the acoustic mismatch model where energy is transferred between two different materials and the critical incident angles are taken into account. Finally we provide calculations of the Kapitza resistance for several interfaces (Metal-Sapphire and Metal-Silicon).
Estimation of the flows mixing efficiency inside T-micromixer with an external perturbation for low Reynolds numbers
Authors: Kravtsova A Yu , Ianko P E , Kashkarova M V , Bilsky A V
Published: December 2019

The flow pattern regimes and mixing quantities in case of an external perturbation for low Reynolds numbers in a T-shape microchannel were studied experimentally using the LIF technique. Formation of a hydrodynamic wave travelling along the outlet channel for the stratified regime was discovered. The wave amplitude is 0.057W
out. The wavelength corresponding to distance between two nearest pits is 3.86D
h. The change of mixing efficiency between undisturbed and perturbated flows in each of the considered sections is less than 6%. However, the arising of wave causes a decrease in the distance at which the flows are completely mixed.
Parameters of magnetron sputtering gas discharge plasma with a small anode
Authors: Sakhapov S Z
Published: December 2019

The plasma parameters of magnetron sputtering with a small cylindrical anode were investigated by electrical methods. Measurements of the current-voltage characteristics of the gas discharge were carried out. It is shown that changes in the operating modes of the magnetron are possible using an additional electrode of small size, to which a positive voltage is supplied from an independent source.
Plasma potential distribution around an infinite one-dimensional chain of dust particles
Authors: Salnikov M V , Fedoseev A V , Sukhinin G I
Published: December 2019

With the help of the code modification used in the authors previous works, the self- consistent distribution of density and electric potential are calculated around a one-dimensional infinite chain of dust particles. As a result, self-consistent distributions of the electric potential and space charge around a one-dimensional chain of dust particles, as well as the dependence of the dust particles charge on the interparticle distance, are obtained.
Numerical investigation of the pulsation frequency of the flow rate effect on the mixing efficiency of the active T-shaped micromixer
Authors: Shebeleva A A , Shebelev A V , Lobasov A S , Minakov A V
Published: December 2019

Flow patterns and mixing efficiency of fluids with different inlet flow rate pulsation frequencies in T-shaped micromixer were numerically investigated at Reynolds numbers Re = 100 and Re = 180. The flow rate pulsations were set sinusoidal with different frequencies of 0; 1; 10 and 50 Hz. The relative mixing efficiency means the mixing efficiency of active mixer regarding the mixing efficiency of an identical passive mixer without pulsations at the input; it was considered as the main value. The dependences of such value on the pulsation frequencies were obtained. It was found that active micromixers are much more efficient than the passive ones. Herewith, in the engulfment regime, the mixing efficiency increases twofold regarding the passive mixer, and in the region, before the onset of the engulfment regime, the mixing efficiency increases by about 170 times. In addition, it was found that the increase in mixing efficiency is almost independent of the frequency of pulsations.
Electric arc synthesis of titanium carbide nanoparticles
Authors: Smovzh D V
Published: December 2019

The structure of titanium carbide nanoparticles formed at electric arc spraying of composite Ti-C electrodes is studied. It is shown that the size of titanium carbide particles in condensation products varies in the range of 10–50 nm, crystal lattice of nanoparticles corresponds to TiC carbide. Annealing the material in an oxygen-containing atmosphere leads to carbon burnout and oxidation of titanium carbide nanoparticles. The main part of carbon is oxidized in the temperature range of 250–500°C, oxidation of titanium carbide nanoparticles occurs in the range from 320 to 400°C. When annealed to the temperatures of 1000°C, sintering of oxide TiO2 nanoparticles occurs. The proposed method can be used to obtain particles of titanium carbide with a shape close to the TiC crystal.
Thermal conductivity and thermal diffusivity of the melt Bi-Pb-Sn-Cd at high temperatures. computer experiment
Authors: Barbin N M , Tikina I V , Terentyev D I , Alekseev S G
Published: December 2019

The method of thermodynamic simulation is used to determine the thermal diffusivity and the thermal conductivity of the melt 42 mass.% Bi-40.6 masses.% Pb-10 Macc.% Sn-7.4 mass % Cd depending on temperature. It was found that the thermal conductivity and thermal diffusivity of melts Bi-Pb-Sn-Cd, Bi-Pb-Sn, Bi-Pb differ by no more than 15%. The obtained values indicate the prospects of using this melt as a coolant.
Experimental study of the titanium nickelide thermophysical properties complex
Authors: Samoshkin D A , Kozlovskii Yu M , Stankus S V
Published: December 2019

The article presents new experimental data on the thermal diffusivity (a), thermal conductivity (λ), heat capacity (Cp
) and linear thermal expansion coefficient (α) of titanium nickelide (56.6 wt. % Ni, 43.4 wt. % Ti). The temperature interval from 293 to 872…962 K has been investigated by laser flash technique, method of differential scanning calorimetry and dilatometric method. The estimated errors of the received data were 2–4%, 3–5%, 2–3% and (1.5–2)×10−7 K−1 for a, λ, Cp
and α, respectively. The approximation dependences and the reference table of investigated transport, caloric and thermal properties have been obtained.
Mathematical modeling of ice melt during irradiation by selective source of thermal radiation
Authors: Sleptsov S D , Savvinova N A , Grishin M A
Published: December 2019

A numerical simulation of the melting of an ice layer on a vertical substrate heated from a radiation source in the form of a halogen lamp in the single-phase formulation of the Stefan problem was carried out. Ice is presented in the form of a pure, non-scattering, selectively absorbing material with two spectral bands of bulk absorption. The computational model takes into account the selective nature of the radiation source. Analysis of the calculation results shows the dominant effect of the incident radiation on the formation of the flux density field of the resulting radiation in the medium. Comparison of the results shows a satisfactory agreement with experimental data.
Experimental investigation of the high-temperature air heating effect on the model artificial gas combustion process
Authors: Filippov P S , Khudyakov P Y , Ryzhkov A F
Published: December 2019

A description of the experimental rig is presented. The effect of combustion air high-temperature (up to 800°C) heating on the model artificial gas combustion process is described. The model artificial gas is a CO-N2 mixture. A comparison of the premixed and diffusion flame lower explosive limits is carried out. Experimental data are compared with open access published data of production of artificial gas-fired CCPP.
Effect of uniform crystal rotation on convective and radiation-convective heat transfer in the Czochralski method
Authors: Mitin K A , Berdnikov V S
Published: December 2019

The conjugate heat transfer in different regimes of heat transfer in the system “crystal – environment – walls of the growth vessd”, geometrically similar to the simplified scheme of the upper part of the thermal node in the Czochralski method, is studied numerically by the finite element method. The system of equations of thermo-gravitational and mixed convection in variables of vortex, stream function and temperature is solved. In addition, the uniform rotation of crystals is taken into account. Calculations are carried out at convective and radiation-convective heat transfer with fixed crystal length. Calculations of radiation fluxes are carried out on the basis of the zonal method under the following assumptions: the calculated area is limited by a closed system of surfaces; all surfaces of the system are grey, diffuse- emitting and diffuse-reflecting; the surfaces are divided into zones within which the radiation properties and temperature can be considered constant; the medium filling the growth chamber is diathermic. The calculations were performed with the Prandtl number equal to 0.68 (argon) and the Grashof number of 16000, typical of the real process. The effect of uniform crystal rotation from 1 to 25 rpm on radiation-convective heat transfer is studied. It is shown that under the action of rotation the spatial form of convective flows loses stability. Secondary vortices appear. As a result, the cooling efficiency of the crystal increases significantly.
Rayleigh–Benard convection in a gas-vapor medium at the temperature close to the critical temperature
Authors: Palymskiy I B , Fomin P A , Li You-Rong , Wu Chun-Mei
Published: December 2019

In this paper, we propose a new physico-mathematical model for the Rayleigh–Benard convection in a gas-vapor mixture of oxygen and cyclohexane, for which the temperature dependence of density has a maximum. Linear stability analysis was performed; two limiting cases where the inversion parameter tends to its limiting values are studied analytically. Formulas are obtained for the growth increment and decay, the neutral curve, and the boundary of the instability region in the wave plane.
Influence of the liquid chladone film on condenser heat transfer in the refrigeration unit
Authors: Sazhin I A
Published: December 2019

In this article, the effect of the thickness of chladone film on heat transfer in the condenser tube of a refrigeration unit is determined. The thickness of the liquid film is determined by the Lockcard-Martinelli and Fulford methods. With an increase in the film thickness of the liquid phase of R22 and R-134a refrigerants, the value of the heat transfer coefficient decreases in a selected range of changes in the refrigerant gas content. A comparison with the results of experimental studies is made.
Environmental Performance and Carbon Emission Disclosures: A case of Indonesian Manufacturing Companies
Authors: Yanto H. , Rofiah A , Bahlawan Z A S
Published: December 2019

Having population more than 250 million, Indonesia is among countries with high carbon emissions. As industry sector of this country contributes significantly to carbon emissions, the Ministry of Environment and Forestry of Indonesia requires companies to implement PROPER—a program to control negative impacts of companies’ operations on environment. The objective of study is to identify the impacts of PROPER on carbon emission disclosure. Environmental performance measured by PROPER has five levels i.e. black, red, blue, green, and gold. Black is considered the lowest rating with score 1 and gold is the best performance with score of 5. The study employs 18 indicators suggested by Carbon Disclosure Project (CDP) to measure carbon emission disclosure. These indicatorsare classified into five categories i.e.climatechange, green housegas, energyconsumption, reduction and cost, and accountability of emission carbon. By using purposive sampling, this study collects data from 100 manufacturing companies listed on IDX. On average manufacturing companies earn blue rating with carbon emission disclosure reach the percentage of 21%. PROPER rating positively and significantly affectseach category of carbon emission disclosure. The government and related parties need to facilitate these companies to improve their environmental performance and carbon emission disclosure.
The Development of gluten and eggs-free Cookies Enriched with Canna edulis flour rich in Resistant Starch Type 3 as a Functional
Authors: Nugraheni M , Sutopo  , Purwanti S , Handayani THW
Published: December 2019

This research aims to determine the gluten and egg-free cookies enriched with Canna edulis flour rich in resistant starch type 3 based on sensory characteristics, chemical composition, and physical properties. The research method was done with cookies formulation based on the amount of Canna edulis flour rich in resistant starch type 3 and a control (wheat flour cookies). The selected cookies based on a hedonic test with 80 semi-trained panelists was Formula I. The value of sensory characteristics were: aroma 7.56 ± 0.65; color 7.56 ± 0.65; taste 7.56 ± 0.73; texture 7.75 ± 0.49; overall acceptance 7.63 ± 0.60. The chemical composition were: moisture content 3.69 ± 0.17%; ash 4.20 ± 0.53%; fat 32.67 ± 0.15%; protein 11.15 ± 0.13%; carbohydrate 28.36 ± 0.60%; soluble fiber 0.80 ± 0.01%; insoluble fiber 24.81 ± 0.10%; resistant starch 3.36 ± 0.08%; amylose 13.80 ± 0.03%; amylopectin 12.88 ± 0.34%; energy 452.07 ± 0.87 cal. The physical characteristics were: weight 1.11 ± 0.02 g; diameter 31.47 ± 0.20 mm; height 3.77 ± 0.09 mm; spread ratio 8.34 0.22 ±, hardness 8.41 ± 0.56 N/kg. The selected cookies can be used as a functional food for people who are sensitive to gluten and eggs.
Designing an Information System Model of Academic Service Based on Customer Relationship management at University
Authors: Prima W , Ganefri  , Krismadinata  , Saputra R
Published: December 2019

This research aims at developing an information system model of academic service based on customer relationship management at university. This research is a research and development (R&D) through Borg and Gall design. This research only focuses and discusses on design stage. The result of this research shows that there are 4 primary supports (portfolio analysis, customer intimacy, determining services strategy, and evaluation) and 4 secondary supports (facilities and infrastructure, lecturers and professional staffs, academic information system website, and book for supporting model). Based on result of this research, it can be said that a information system of academic service model that has been designed effectively can be applied to improve academic service because it is based on practical theories that have been developed.
Development of Blended Learning Model Based on Project in Computer Network Design and Management
Authors: Saputra R , Jalinus N , Krismadinata
Published: December 2019

Entering the industrial era 4.0, the role of the world of education is very important in forming graduates who are competent and can compete in the business world. Graduates are required to have understanding and expertise / skills in their respective fields. Therefore learning activities must innovate in meeting the demands of the workplace. One of them is by utilizing technological advances in learning activities in the form of learning applications based on project tasks. With this project-based blended learning model, students are trained to complete a project designed according to the needs of the industry / company and can take advantage of learning applications as learning media. Lecturers can monitor the development of projects carried out by students through learning applications, besides that this application can be used by lecturers and students to discuss when problems are encountered during learning activities. The assessment activities are not only from mastering the material but also from student project assignments. By giving projects to students, it can train students’ ability to solve problems and do simple designs on computer networks. This learning model was implemented at STMIK Indonesia Padang in the Computer Network Design and Management course. The development of this project-based Blended Learning model was carried out using the Borg and Gall development model. From the results of the development produced a learning syntax of project-based blended learning models.
Adobe Flash-Based Multimedia Learning System in Basic Analog and Digital Electronics Subject
Authors: Suhada Sitti , Setiawan Edi , Alamri Talib
Published: December 2019

The objective of this research is to develop a multimedia learning for basic analog and digital electronics subject. This present study employed research and development method. Prior to the trials, the developed learning media will be validated by experts in media and material. The results reveal that the total score of the validation by 1) media experts reaches 86 (90.52%) and 2) material experts reaches 110 (91.66%), 3) the outcome of t1he user trial encompasses aspect, e.g., (a) aspect of media with the score 666 (88.80%), (b) aspect of learning material with the score 517 (86.17%), and (c) aspect of media with the score 546 (91%). The overall score of the assessment by the students regarding multimedia learning is 1729 (88.67%). From the results of the feasibility test, it is concluded that the developed learning media are of feasible to use in the class to improve the students’ learning, specifically in introducing electronic components.
Enrichment in the Electrical Engineering Vocational and Education (EEVE) Study Program by Augmenting the Image Processing Study Course
Authors: Mukhaiyar R , Irfan Dedy , Hambali  , Frismelly A , Utari N
Published: December 2019

An improvement of each curriculum usually is linear with the demand required by the stake holders and it is happened in EEVE study program as well. One of the improvement asked is the augmenting of the Image Processing course study to support the need of the industrial sector such as mining, forecast weather, IT, graphic analysis, petroleum, and so on, for the skills of image processing. By implementing a study called adjusted curriculum-characteristic, this paper shows a method how to inject a new course with different characteristic in a vocational and education study field. This approach is expected to be a pattern for the other university to implement an augmenting method for its curriculum.
Validity of Information System Model of Academic Service based on Customer Relationship Management at University
Authors: Prima W , Ganefri  , Krismadinata  , Hayati R
Published: December 2019

This research is a part of developing research model on information system of academic service based on customer relationship management at university. This research is a research and development through Borg and Gall design that has 10 phases. Nonetheless, on this research only focuses on product validity that is third phase on Borg and Gall design. The result of this research has 3 types of products. First is a book model that contains primary support model and secondary support model. Second is information system of academic service website that can be used as a supported tool to apply a model at university. Third is a guiding book that can be used to guide the process in using information system of academic service website. This result of this research also shows that product has been got is categorized very valid. It can be said that product got, can be applied for the next phase of this research.
Artificial Intelligence (AI) Chatbot as Language Learning Medium: An inquiry
Authors: Haristiani Nuria
Published: December 2019

In facing industry revolution 4.0, utilizing advanced information and computer technology in educational environment is crucial. One of the advanced computation technologies that can be used for learning, especially language learning, is chatbot. Chatbot is a computer program based on artificial intelligence that can carry out conversations through audio or text. This study intends to find out and analyze the types of artificial intelligence in the form of chatbots and the possibility of their use as language learning medium. The data in this study obtained from literature review on chatbot researches, and from observation results on chatbot-based language learning medium developed by the author. The results indicated that chatbots have a high potential to be used as a language learning medium, both as tutor in practicing language, and as independent learning medium. Moreover, research results revealed that language learners are interested in using chatbots because they can be used anytime and anywhere, and they are more confident in learning languages using chatbots than when dealing directly with human tutors.
Designing A Generating System Multiple Choice Questions
Authors: Winarko E , Roesminingsih E
Published: December 2019

The purpose of this research is to build a system of generating questions that can make as many questions as possible. The Generating System of this Problem can be used starting from elementary/middle/high school/higher education level with the type of choice questions that have 3 components, namely the problem, choice and completion. In order for the system to function properly, a template is needed for the three components above that can identify the needs of variables that might appear on a problem. Several variables are obtained from the identification of the results, namely: Numerical Variables, String Variables, Image Variables. Templates needed on the system are 3 templates, namely the template, template selection and completion template. All those three contain text, variables and identification tags. Variables that are permitted in this template are Numerical Variables, String Variables and Image Variables. While the identification tags that are permitted are numerical [var] numeric [/var]; variable tag string [str]collectname[/str]; the variable tag image [img]filename[/img], the tag tocalculate [eval]equation[/eval] to be executed and generating the value and tag equation [equ]equation[/equ]that will be displayed as an equation. It was found in the result of the implementation that one template able to build hundreds/thousands of questions, combination of choices and the completion of each question.
Live Webcast System Design for Smart Classroom Learning In Electronic Engineering Department
Authors: Huda Yasdinul , Rukun Kasman , Faiza Delsina , Jaya Putra
Published: December 2019

This research supports the achievement of government programs and the Research Plan of the State University of Padang, especially on the topic of IT-Based Learning Development in the fields of excellence in Education and Educational Sciences. The long-term goal of this research is to develop innovative and flexible learning models based on Smart Classroom that is focused on developing a Smart Classroom learning system based on Live Webcast in the FT UNP Electronics Engineering Department. Smart Classroom learning system tools are developed to bridge the gap between virtual classes and physical (traditional) classes in terms of the learning experience by combining the two separate teaching practices smoothly. The research method uses a quantitative approach and the type of research is R & D adopting the Thiagarajan 4D development model. This research produces a Smart Classroom system based on Live Webcast through several stages, namely: (1) System Design, (2) System Creation, (3) System Testing. This developed system allows interaction of physical classroom learning and also virtual classroom teaching at different locations.
Selection of Most Proper Blasting using TOPSIS Method in PT Pamapersada Nusantara Jobsite TOPB
Authors: Kopa R , Muji A S , Ahmad D
Published: December 2019

Blasting is an important operations in mining. The improper selection of blasting geometry will create a problem with blasting results, such as rock fragmentation with a lot of boulders, flyrock, high ground vibrations, high air blasts, long digging time, and high powder factor values. Based on the problems that arise, choosing the right blasting geometry will certainly be needed. Selecting the right blasting geometry can be done using the Multi Criteria Decision Making (MCDM). TOPSIS is one method that can be used in decision making. In determining the right geometry using this TOPSIS, safety and technical parameters are taken into consideration. Finally, blasting geometry with burden of 6.5 m, spacing of 7.5 m, drill hole diameter of 20 cm, subdrilling of 0.5 m, hole depth of 7.25 m and stemming of 4.3 m has been presented as the most suitable blasting geometry for PT Pamapersada Nusantara Jobsite TOPB.
Design Of Server Performance Monitoring Application Integrated Administration Service System In Electronic Engineering Department
Authors: Tasrif Elfi , Huda Asrul , Saputra Hadi Kurnia , Mubai Akrimullah
Published: December 2019

The objective of this study is to make an application design to monitor server performance that can be used to monitor and inform server performance to administrators. The implementation of this server performance monitoring application is carried out on the Integrated Administrative Service System server of the Electronics Engineering Department, Faculty of Engineering, Padang State University. Server performance monitoring application built using the waterfall method. Making the application is also supported by the Script Shell programming language in retrieving information from the server, server information generated by the SNMP and SNORT applications and then reported to the administrator by the Sendemail and Gammu applications. The server performance monitoring application website is built using the Laravel framework, the LTE Admin template and the Canvas JS chart. This server performance monitoring application is able to monitor, recap and report server performance. Application reporting is done using e-mail and sms media, if a problem occurs on the server. So that the application of server performance monitoring applications on the server will be able to help the work of administrators to maintain the availability of a reliable Integrated Administrative Service System in the Electronics Engineering Department.
The urgency of entrepreneurship learning in the industrial age of 4.0
Authors: Handayani Tyas E. , Naibaho Lamhot
Published: December 2019

This study was aimed to provide information on the urgency of learning entrepreneurship in the era of industrial revolution 4.0. The 4.0. Industrial revolution not only provides opportunities but also challenges for the millennial generation. The developments of science and technology as a trigger for the industrial revolution cause some implications such as unemployment, human vs. machine competition, and increasingly high demands on competency. It is estimated that in the next five to ten years it will eliminate 35 - 75 per cent of the work. As a result, the production process becomes faster and easier to distribute. Then what about human energy? New business opportunities will stimulate the emergence of young entrepreneurs. This is what encourages the emergence of the spirit of entrepreneurship along with changes and developments in the times. The purpose of this study is to explain the importance of learning entrepreneurship in the industrial era 4.0 from elementary to university. The method used in this study was literature and scientific journals studies through a theoretical descriptive approach. The finding of this paper is: In order to be able to compete in the industrial revolution era 4.0, the early creative and innovative entrepreneurship learning is and innovative.
Implementation EDS-AV (Educational, Develop, Society-Audio Visual) Script Model in Practices Learning
Authors: Sabara E , Wahrini R
Published: December 2019

Practice learning is laboratory activity to carry out stages of experimental competence through job sheet learning devices. Job sheet used in generally still in the form of written documents, so it takes a development that can make easy for practitioner. Implementation EDS-AV script model in practical learning is the right solution. The purpose of this study (1) planning design of EDS-AV script model in analog electronics practice learning (2) motivating students to carry out practical learning with EDS-AV script model to experiment complete, and (3) EDS-AV script model can increase attractiveness students in conducting experiments of audio-visual job sheet. The development model is combination several models that have been developed previously and modified into EDS-AV script models of Audio-Visual based job sheet documents. The result obtained based on description of expert validation data include aspects: material feasibility, language feasibility, presentation feasibility, media effects on learning, and overall appearance that are is very good category. Implementation of learning results is very good category, as well as students responses to EDS-AV script model is very good category. The conclusion of implementation EDS-AV model in analog electronic practical learning has been well implemented as well as student response are in very good suggestion.
Curriculum Evaluation based on AUN-QA Criterion for the Case Study of the Electrical Engineering Vocational and Educational (EEVE) Study Program
Authors: Mukhaiyar R , Muskhir M , Hambali  , Dolly VP
Published: December 2019

Educational Quality, of producing graduates along with the expectations of the community such as, personal quality, morality, knowledge, and work competency is an absolute requirement for the global community adjustment in sustainably. In ensuring it happened, it is required to apply a qualified program which is focus in an effort to satisfy all components of the educational activities. Improving the quality requires a standard, carried out in one clear work procedure, strategy, and collaboration among the stakeholders continuously. This paper introduces the program conducted by the EEVE study program in achieving the goal to certificate by AUN-QA throwing an evaluation approach of the curriculum. The curriculum is mapped based on the competency level required by the stake holders. There are three criterion of the competency mapping i.e. basic, vocation, and elective courses. Therefore, this research results a curriculum development of EEVE, as answer of a basic needs for the graduate and appropriate with the standard of AUN-QA as well.
Concept and Implementation of Family Education as an Efforts to Prepare Youth Generation for Industrial Revolution 4.0
Authors: Rusdjiono  , Khotimah K. , Bachri B.S.
Published: December 2019

The purpose of this study is to find a model of successful family education instilling moral and religious values in an effort to prepare the young generation to face the 4.0 industrial revolution. The findings can be used as best practice for families who want to instill moral and religious values for their children and also can be used as a basis for compiling a theory of family education that is in accordance with Indonesian culture. The research approach is Qualitative. The sampling technique was purposive snowball sampling. Data were collected using the method of in-depth interviews and observations, while to maintain the credibility of the data using triangulation methods and sources. The data analysis technique uses qualitative descriptive. There are three findings, the first is that education begins when the child is still in the womb of the mother. Secondly, the principle used in educating is “ing ngarso sung tulodho, ing madyamangunkarsa, tut wurihandayani”. Third, the pattern of cooperation between father and mother in educating children using the philosophy of “successful children’s education because of the role of wise mothers and mothers who successfully educate children because of the support of wise fathers”.
The Effect of Learning Media on Progress Quality in Office Administration Program in Vocational School Negeri 1 Watampone Bone Regency
Authors: Niswaty R , Arhas S H
Published: December 2019

This study aims to describe the use of learning media and the quality of learning in the Office Administration Expertise program of Vocational School Negeri 1 Watampone as well as the influence of learning media on the quality of the teaching-learning process in there. This study uses quantitative research with a population of all students in there totaling 208 students, with a sample of 68 students at a level of error of 10 percent. Data collection is done by using observations and questionnaires. The data analysis technique used is descriptive statistics and inferential statistics. The results of this study indicate that the use of learning media in there is classified as good, in terms of aspects of print media, electronic media, and media reality. The quality of the teaching-learning process in there is considered good in terms of active, innovative, creative, effective and enjoyable learning. There is a significant positive influence on the use of instructional media on the quality of learning in the office administration expertise program of Vocational School Negeri 1 Watampone which is 17.9 percent.