Obtained Calculation Results Research Articles

DEVELOPMENT OF INTERACTIVE MULTIMEDIA BASED ON BALINESSE CULTURE CONTEXTUAL IN GRAPHIC DESIGN LEARNING AT CLASS X MULTIMEDIA IN SMK NEGERI 1 SAWAN

The objectives to be achieved in this study were (1) to describe the design of interactive multimedia development based on Balinese culture on graphic design learning at class X Multimedia in SMK Negeri 1 Sawan. (2) to describe the responses of content experts, design experts and media experts to the development of interactive multimedia based on Balinese Culture contextual on graphic design learning at Class X Multimedia in SMK Negeri 1 Sawan. (3) to describe the response of the user / teacher teaching graphic design subjects to the development of interactive multimedia based on Balinese contextual culture on graphic design learning at Class X Multimedia in SMK Negeri 1 Sawan. (4) to describe the response of students in the form of individual trials, small group trials and field trials on the development of interactive multimedia based on Balinese Culture contextual on graphic design learning in Class X Multimedia in SMK Negeri 1 Sawan. The interactive multimedia development model based on Balinese cultural contextual learning graphic design used Dick & Carey model. In the process of designing multimedia products, content experts are required to adjust the material presented in interactive multimedia with the material provided at school, in this case the teacher is appointed as content expert, so the teacher's contribution in this study is to provide a syllabus of graphic design material. In addition to content experts, media experts and design experts are also needed to test the validity of interactive multimedia developed. After being valid, it will be implemented in school by giving a questionnaire to students whether the interactive multimedia developed in this study is suitable for use or not. The following are tests on aspects of display, graphics, program operation and grammar performed by media experts obtaining 85% of the calculation results in good qualifications. Tests on aspects of learning, curriculum and interface design conducted by learning design experts obtain a calculation of 89% in good qualifications. User/teacher responded well. Individual trials carried out received good responses. Small group trials obtained calculation results of 90% are in very good qualifications. Field trials that were carried out obtained a calculation of 87% in good qualifications.

Pre-design inspection of the long-term operation lock

For hydraulic structures of long-term operation, assessments of operating life, limit states and safety of structures are required. The design of reconstruction, restoration of functional parameters of structures is preceded by pre-design inspections of the structure. The relevance of pre-design inspections is the need to assess the characteristics of technical and operating state of the structure, to describe reasons for deviations from design parameters of operation, to obtain recommendations to justify the design of reconstruction, restoration or repair of structures. This article presents the results of a pre-design inspection of a high-pressure lock on the Ufa River. An analysis of the complex of effects on the stress-strain state of the structure, static calculation of the lock chamber wall is carried out considering design changes during the operation period – installation of additional buttresses, vibrodynamic inspection and calculation. The obtained calculation results are compared with data of instrumentation equipment. The purpose of the inspection is to obtain a preliminary design assessment of technical state of the hydraulic structure – lock, including an assessment of the possibility of further operation. The practical significance of the paper is determined by the fact that the results obtained can serve as baseline data for a design of reconstruction, restoration of a hydraulic structure and recommendations for ensuring its long-term safe operation.

VERIFICATION OF ELASTOMERIC BEARINGS FINITE-ELEMENT MODELS IN CALCULATING SOFTWARE PACKAGES

Introduction. While designing buildings and constructions with an elastomeric bearing with a lead core as a seismic isolation system, it is necessary to make calculations concerning effectiveness and reasonability of its usage. These demands lead to necessity to construct bearings in a common finite-element model, in order to consider how a bearing and a construction work together. Though a calculator has a lot of different variants of elastomeric bearing’s construction, which are connected to their implemented work model. To prove that obtained calculation results are sufficient and accurate, selection criteria of elastomeric bearings implemented work models are necessary. Materials and methods. To get accurate results we will compare elastomeric bearing’s work diagrams and free periods of motion when there are different variants of their numerical modelling with the help of software packages with factory tests results. Results. The researches have shown that lateral force’s and shear’s limit values are the same for all of the observed cases, although free periods of motion and work diagrams differ. Usage of more accurate bearing work model in software package Ansys/LS-Dyna can explain these differences, it can be seen if compare their work’s diagrams. Conclusions. Analysis of constructions with elastomeric bearings’ work, which function according to the idealized linear model, can be possible only for II level constructions. Idealized nonlinear models should be used for I level constructions.

VERIFICATION OF ELASTOMERIC BEARINGS FINITE-ELEMENT MODELS IN CALCULATING SOFTWARE PACKAGES

Introduction. While designing buildings and constructions with an elastomeric bearing with a lead core as a seismic isolation system, it is necessary to make calculations concerning effectiveness and reasonability of its usage. These demands lead to necessity to construct bearings in a common finite-element model, in order to consider how a bearing and a construction work together. Though a calculator has a lot of different variants of elastomeric bearing’s construction, which are connected to their implemented work model. To prove that obtained calculation results are sufficient and accurate, selection criteria of elastomeric bearings implemented work models are necessary. Materials and methods. To get accurate results we will compare elastomeric bearing’s work diagrams and free periods of motion when there are different variants of their numerical modelling with the help of software packages with factory tests results. Results. The researches have shown that lateral force’s and shear’s limit values are the same for all of the observed cases, although free periods of motion and work diagrams differ. Usage of more accurate bearing work model in software package Ansys/LS-Dyna can explain these differences, it can be seen if compare their work’s diagrams. Conclusions. Analysis of constructions with elastomeric bearings’ work, which function according to the idealized linear model, can be possible only for II level constructions. Idealized nonlinear models should be used for I level constructions.

Assessment of the technical state and the possibility of its control for the further safe operation of building structures of mining facilities

There are about 200 operating mines in Ukraine, most of which have not been reconstructed for more than 20 years. Modern anthropogenic and ecological impacts are caused by local technogenic catastrophes and the global ecological crisis. The statistical data on the safety of Ukrainian mines were considered. A literary analysis has been made of advanced expertise in the technical state assessment of the building structures. The purpose of the study is to make optimal decisions when constructing, operating and maintaining the buildings. The procedure for assessing the building state is the result of research, the purpose of which is to develop a technique for reliable and operational assessment of the building structures technical state. In this paper, a technique is proposed for inspecting the constructions and assessing their technical state. The maximum efforts in elements of the adapted frame were used for checking calculations and constructional design. The obtained calculation results were used in determining the sufficiency of existing cross section value of the structure elements. According to the calculation results, a conclusion has been made that hardness, stability and rigidity of the frame elements as a whole are ensured; further operation of the building structures is possible providing for the project development to strengthen building structures and to implement the design solutions at the construction site. In order to ensure the continued normal operation, it is necessary to develop a project for strengthening the structures, as well as a project for fire protection of building structures.

Pulse Magnetization of Strap Toroidal Magnetic Core

Diffusion of the pulse magnetic field into the metal of the toroidal magnetic core wound by a transformer steel strap is considered. The 1-D numerical model has been developed, which takes into account the viscous-type dynamic losses of magnetization, as well as the eddy currents. The parameter of viscous-type dynamic losses of magnetization was measured on samples of cold-rolled anisotropic transformer steel. The processes of magnetic field propagation in the strap, when the transformer is switched to the voltage source, have been analyzed, and the iteration algorithm of calculation of magnetic field in the strap has been developed. The experimental data have confirmed the obtained calculation results. The problems of application of transformer steel in pulse transformers are considered.

Recoilless Gun System as a Particular Form of General Interior Ballistics Model of Gun Propellant Systems

The development of the interior ballistics general model of gun propellant systems by taking into account the specificity of the recoilless propellant system is presented in this paper. The presented expanded physical and mathematical model makes possible the simulation of classical and nonclassical gun systems: two-chamber, mortar, and the considered recoilless one. To solve the system of equations associated with the mathematical model, a computer programme was developed. An analysis was made for two configurations of a recoilless system, differing in the way of arrangement of a propellant charge, i.e., with the propellant charge moving together with a projectile and with the propellant charge burning in a cartridge chamber. The obtained calculation results showed that the system, in which the propellant charge moves together with a projectile, has the maximum pressure and the muzzle velocity higher in comparison with the system with the propellant charge burning in a cartridge chamber. Influence of a way of placement of the propellant charge is the stronger, the higher is the ratio of its mass to the projectile mass. The results of the accomplished calculations, especially the pressure inside the barrel as well as motion parameters of the projectile make the grounds for projecting and construction optimization of the recoilless gun systems.

The Active Power Losses in the Road Lighting Installation with Dimmable LED Luminaires

In accordance with the requirements of PN EN 13201-5 standard for road lighting installation, energy performance indicators should be descripted. In order to calculate energy performance indicators, it is necessary to know the active power of the road lighting system. The above standard does not specify whether active power losses should be taken into account in calculations. The main purpose of the article is to estimate the active power losses in the road lighting installation. The article presents methods for calculating active power losses, taking into account losses in all main elements of the installation. The obtained calculation results show the relationship between active power losses and the power of luminaires, their number and spacing between poles. Calculations of active power losses were made for single-phase and three-phase installations. The active power losses in a three-phase system do not exceed 1.5% and in a single-phase installation they may be greater than 7%. Therefore, in order to obtain exact values of energy performance indicators (and also predict electricity consumption), active power losses should be taken into account in calculations. In addition, a comparative analysis of the effect of luminaires dimming and active power losses on annual CO2 emissions was made. Not taking into account the active power losses in the calculation of the lighting installation’s power, for single-phase installations in particular, understates the calculated value of CO2 emissions by more than 6%.

Vehicle Vibration Safety Evaluation in the Time Domain

The article is a sequel to studies of the nonlinear vibration isolation systems of a vehicle. The first published papers considered an application of the known methods of statistical linearization when determining the vibration safety performance in the frequency domain. The frequency domain is the most adaptive in the context of analysis of the obtained calculation results and evaluation of the initial dynamic system features. Therefore, a problem to determine the adequacy range of such calculations in the frequency and time domain is relevant.The paper deals with the problem of creating a technique to determine and analyze the spectral characteristics of the vehicle vibration isolation system when modeling in the time domain. Considers as an object, a nonlinear dynamic system equivalent to the nonlinear vibration isolation system of a vehicle under its spatial vibrations. In formulating a system of equations-of-motion of the adopted system a module-based method was used. As an example, the power unit is given. Modeling of input random perturbations, provided that the solutions obtained are adequate, is based on the recurrent difference equations. The subsequent transformation of the calculation results into the frequency domain is based on the finite Fourier transforms.To determine the final parameters which characterise the effectiveness of the vibration isolation system, at the first stage of calculations the dynamic system was tested in a linear setting.The vector of natural frequencies of a conservative system defined in the frequency domain was compared with the spectrum of natural frequencies (the frequency response) calculated in the time domain. Besides, the article has carried out a conformity evaluation of the amplitude-frequency characteristics obtained in the frequency and time domain and their determining accuracy. The obtained positive results made it possible to compare and analyze the spectral characteristics of vibration signals and dynamic system in its nonlinear and linearized formulation. The coherence function, the amplitude-frequency characteristic, the spectral density of perturbation and output vibration signal, the vehicle suspension and tyre load characteristics are considered as the analyzed ones. The article compares the output characteristics of the dynamic system under consideration for the case in linear, linearized, and nonlinear formulation of the problem.

The parameters influencing sphere cooling in a cold liquid

The processes of heat and mass transfer during cooling of heated sphere in the subcooled liquid are studied. When a heated solid surface is submerged in a liquid with a considerably lower saturation temperature, a vapor film can be formed around the heater. Using of non-equilibrium boundary conditions gives the possibility to solve this problem with taking into account peculiarities of the transport processes at the vapor–liquid interface. The Fourier thermal conductivity law is used for description of heat transport process in vapor film. The heat from external boundary of vapor film is removed through natural convection. Pressure balance is provided by hydrostatic pressure and non-equilibrium boundary condition. The obtained calculation results are compared with the previous calculation data and known experimental results.

Thermal conductivity of coal mining wastes in the thermally active zone of a waste dump – in situ study

Coal mining wastes accumulated at dumps include a certain part of carbon. It is one of the components that reacts with the oxygen contained in air. Due to the natural oxidation process, self-heating of the waste material occurs which – in favourable conditions – leads to a fire. In view of fire prevention, possible heat recovery or studies and modelling of thermal phenomena occurring in a waste dump, thermal conductivity of mining wastes may be considered a significant parameter. The value of the thermal conductivity coefficient constitutes a part of the information that is necessary in the study of the heat transfer within the mass of the dump. The paper presents the results of tests conducted at one of the thermally-active dumps located in the Upper Silesian Coal Basin. The conducted tests consisted in the reception of heat from the heated material using vertical heat exchangers. Based on the measurement results of temperature changes of the wastes in the surroundings of the exchanger and the temperature of the flowing coolant, the thermal conductivity coefficient of the coal mining wastes accumulated at the waste dump was established. Due to the variable character of the thermal condition in the direct vicinity of the heat exchanger, the parameter for the steady state was determined by extrapolating the obtained calculation results. The obtained values of the coefficient fit within the range from 0.406 to 1.09 Wm-1°C-1.

Investigation of gamma strength functions and level density models effects on photon induced reaction cross–section calculations for the fusion structural materials 46,50Ti, 51V, 58Ni and 63Cu

Scientists have been focused on fusion reactor studies to overcome the increasing energy demand. The materials, which have the potential to be used in fusion reactors must be resistant to the harmful effects of radiation in the manner of material itself. Selection of the appropriate materials to be used in nuclear reactors has a crucial importance to achieve the maximum efficiency and security. Ti, V, Ni and Cu are known as some of the constructional fusion materials. Existence of many knowledge about those materials provides countless advantages to the researchers and one of them is the cross–section, which basically means the probability of a nuclear reaction's occurrence. In addition to the cross–section, there exist some other parameters, which could be pointed as gamma strength function and level density models that affect the theoretical calculations. In this study, photon induced reaction cross–sections of 46,50Ti, 51V, 58Ni and 63Cu target isotopes have been calculated by using TALYS 1.8 code with different gamma strength functions in the giant dipole resonance region. For gamma strength functions Kopecky-Uhl generalised Lorentzian Model, Brink-Axel Lorentzian Model, Hartree-Fock BCS tables, Hartree-Fock-Bogolyubov tables and Goriely's Hybrid Model have been employed. To appoint the best gamma strength function model, the relative variance calculations have been performed. Also, reaction cross–sections have been recalculated by using the best gamma strength function models through the different level density options. Constant Temperature Fermi Gas Model, Back Shifted Fermi Gas Model and Generalised Super Fluid Model have been employed for level density calculations. Experimental data for the investigated reactions have been taken from EXFOR library and used for comparisons of the obtained calculation results.

Impurity-induced bound states as a signature of pairing symmetry in multiband superconducting CeCu2Si2

The notion of multiband superconductivity with dominant two-gap features has been recently applied to the unconventional superconductor CeCu2Si2 for challenging the previously accepted concept of nodal d-wave pairing. In the proposed study, the realistic multiband Fermi surface topology of CeCu2Si2 was obtained through first-principles calculations, and analysis was conducted with an effective two-band hybridization model including detailed band structure. Within the T-matrix approximation, the obtained calculation results show that different pairing candidates, including fully gapped s-wave, loop-nodal s-wave, and d-wave pairings, could yield qualitatively distinct features characterized by impurity-induced bound states. These features can be verified through high-resolution scanning tunneling microscopy or spectroscopy and provide corroborative justification that would be beneficial for the ongoing research regarding the superconducting gap symmetry of CeCu2Si2 at ambient pressure.

Towards Determination of Inductive Resistances of Single-Core Cables with Voltage of up to 1 kV Insulated by Cross-Linked Polyethylene

To calculate short-circuit currents, voltage losses and reactive power in electrical networks, information on inductive resistances of cable lines is required. In the technical literature there are no exact parameters of single-core cables with voltage of up to 1 kV insulated by crosslinked polyethylene. This results in inaccuracies in the calculations of modes of electrical networks. The article considers the issues of determining the inductance and inductive resistance of power lines up with voltage of up to 1 kV made of single-core cables and insulated by crosslinked polyethylene. The analysis of formulas for determining the inductance given in different literature sources was fulfilled, that demonstrated a significant difference in the numerical values of the obtained calculation results. The formula that provides more reliable calculations of the inductance of the cable lines was identified. The influence of the permissible increase in the thickness of the insulation and the sheath of a single-core cable with voltage of up to 1 kV covered with cross-linked polyethylene on the inductive resistance was determined. The inductance and inductive resistance of single-core cables were calculated when the cables were arranged along the vertices of an equilateral and right-angle triangle, as well as in one plane. It was shown that the specific inductances and inductive resistances are 1.7–1.8 times greater in the plane with the distance between adjacent cables equal to the outer diameter of the cable than in the location is close to the triangle. When the cross sections of conductive cores are large and installations are multi-ampere, there is a surface effect and proximity effect, due to which the magnetic field intensity inside the core and its inductance decrease. Inductivities and inductive resistances of singlecore cables with voltage up to 1 kV were determined taking into account the influence of the surface effect and the proximity effect. The calculations that we performed have shown that the nonconsideration of the above-mentioned effects leads to significant errors in the determination of inductive resistances. The influence of one-core cables of armor made of steel tapes on inductive resistances is considered. An illustrative example shows that the inductive resistance of an armored cable with a cross-section area of the current-conducting core equal to 800 mm2 is about twice as large as the unarmored one. The use of single-core cables in three-phase electrical networks, armored with steel straps, ought to be prohibited by regulatory documents, since such cables dramatically worsen the efficiency of power supply systems.

Analysis of the Response of Pile Groups Considering Pile–Cap–Soil Interaction in Layered Soil

The shear displacement method was used to simulate the response of pile groups considering pile-cap-soil interaction in layered soil. The pile cap was modeled using the finite element method with 16-node degenerate elements and the pile-pile interaction was assumed to be in a linear elastic state. The effect of the reinforcement effect between plies on the response of pile groups was considered. The obtained calculation results were compared with values estimated in finite element and field tests, and the feasibility of the proposed model for the analysis of a pile group and piled raft foundation was verified.

On-chip remote charger model using plasmonic island circuit

Abstract We propose the remote charger model using the light fidelity (LiFi) transmission and integrate microring resonator circuit. It consists of the stacked layers of silicon-graphene-gold materials known as a plasmonic island placed at the center of the modified add-drop filter. The input light power from the remote LiFi can enter into the island via a silicon waveguide. The optimized input power is obtained by the coupled micro-lens on the silicon surface. The induced electron mobility generated in the gold layer by the interfacing layer between silicon-graphene. This is the reversed interaction of the whispering gallery mode light power of the microring system, in which the generated power is fed back into the microring circuit. The electron mobility is the required output and obtained at the device ports and characterized for the remote current source applications. The obtained calculation results have shown that the output current of ∼2.5 × 10−11 AW−1, with the gold height of 1.0 µm and the input power of 5.0 W is obtained at the output port, which is shown the potential application for a short range free pace remote charger.

PENGARUH KUALITAS PELAYANAN DAN KUALITAS PRODUK TERHADAP LOYALITAS KONSUMEN CV. SABANI INDONESIA SURABAYA

ABSTRACTThesis entitled "The impact of service quality and product quality to consumers loalitas CV. Sabani Indonesia Surabaya "aims to determine the effect of service quality and product quality terehadap consumer loyalty simultaneous partial and see what's most dominant influence. In this study, researchers used a questionnaire to determine the perception of respondents was 50, a data analysis technique used in this study were using multiple linear regression with correlation test, F test and t test tools. The test results of this study are obtained calculation results of multiple linear regression is Y = 1,876 + 0, 105 kpl + 0.172 mortgages where all these variables have positive influence and direction of the dependent variable namely customer loyalty CV. Sabani Indonesia Surabaya. The test results simultaneously obtained Fhitung 71.299 71.299 which means Fhitung> Ftabel 3.20, or can be seen from the level of significance of 0.000 <0.05 (α = 5%). While partially obtained Thitung Quality of service (KPL) = 2,865 Thitung Product Quality (KPR) = 4,348, thus Thitung> Ttabel (2.01174). Thus the hypothesis which states that the quality of service and product quality simultaneously or partially significant effect on consumer loyalty CV. Sabani Indonesia Surabaya proven true. Variable quality of products (mortgage) has the most dominant influence on the satisfaction of members of the cooperative as it has the largest regression coefficient is 0.172 compared to 0.105 service quality variables.Keywords: quality of service, product quality, customer loyalty

Influence of the minimum salary level increase on the business entities activity in the context of the transition to the sustainable development

In the context of transition to the sustainable development actually justified and economically balanced managerial decisions are worth to be introduced into activity of the business entities. First of all, it is connected with the formation of the social standards by the Ukrainian government. Establishment of the minimum salary for the employees of the national economic complex of the country is one of the main components of these standards. This indicator influences both the increase of the population’s social welfare provision level and on the economy of the economic entities, including business representatives. Research was conducted in Ukraine. The main trends of the social welfare provision of the business sector entities, including the experience of Hungary and Russia, were analyzed in this article. The main rules of the effective social welfare provision, accounting the necessities of the business environment, were formed. Economical analysis of the retrospective and predictive information about the payroll payment and payment of social contributions was made. The influence of the increase of the minimum salary on the activity of business entities, taking into account raised minimum salary, was analyzed. The regressive model of the payroll budget dependence, accounting minimum salary and social contributions’ level increase, was designed. Obtained calculation results showed high level of tax burden on the business sector entities, so, organization-economic measures of tax burden decrease on the business entities were offered. They took into account minimum salary growth for their employees in the context of the transition to the sustainable development. Recommendations concerning the further scientific researches on the topic of the article were offered.

Analysis of Cruising Fuel Conservation Capabilities of Multi-Mode Engine with the Third Contour

Based on the analysis results from the patent search and review of domestic and foreign publications in variable cycle engines (VCE) was created a classification of the possible schematic diagrams of VCE realizing three-stream engine technologies (the adaptive low pressure compressor (LPC) with air extraction behind stages, FLADE compressor, various feeding types of extraction air to the flowing path of the engine, etc.). To estimate a three-stream engine application as a part of the power-plant (PP) efficiency, was chosen an adaptive LPC technology scheme with the third contour air bypass beyond the critical section of a basic jet nozzle for which a mathematical model (MM) of the PP has been created on the basis of one-dimensional MM of the engine. The MM of the PP included 3D modeling results of the air inlet, the LPC with various air extractions to the third contour, and the jet nozzle taking into account the interaction between the basic stream and the third contour stream. The predicted performance of an air inlet have been used to estimate the changes in a total pressure restoration coefficient and an additional resistance coefficient along «a fluid contour» when air extraction is included in the third contour in several cruiser modes of flight. An integrated characteristic of the LPC has been received at various points and levels of air extraction to the third contour, and parameters of extracted air (depending on the point and amount of air extraction, and also on the fan operating mode) have been calculated. When analyzing the obtained calculation results, the effect of pressure lines displacement to the right (towards the large reduced rates), growth of efficiency values, and also position displacement of its maximum value to the left (towards the descent reduced rates) has been found. To estimate how air extraction of the third contour between the plates of an adjustable supersonic nozzle impacts on its aft deck resistance various parameters of the flowing out air in subsonic cruiser mode of flight have been calculated. As a result of calculations according to the PP MM, under near-the-earth conditions of the subsonic cruiser flight, the effective specific fuel consumption has been reduced by 12,5 %. The results reached allow us to expect significant subsonic effective fuel conservation of the three-stream engine. To prove the calculated results it is further necessary to achieve them under full-scale conditions using the engine-demonstrator.

The Influence of Gear Micropump Body Asymmetry On Stress Distribution

Abstract The paper presents the results of numerical calculations of stress distributions in the gear micropump body for applications in hydraulic systems, especially in the marine sector. The scope of the study was to determine the most favorable position of bushings and pumping unit in the gear pump body in terms of stress and displacement distribution in the pump housing. Fourteen cases of gear pump bushings and pumping unit locations were analyzed: starting from the symmetrical position relative to the central axis of the pump, up to a position shifted by 2.6 mm towards the suction channel of the pump. The analysis of the obtained calculation results has shown that the most favorable conditions for pump operation are met when the bushings are shifted by 2.2 mm towards the suction channel. In this case the maximal stress was equal to 109 MPa, while the highest displacement was about 15μm. Strength and stiffness criteria in the modernized pump body were satisfied.