The Development of Fresnel Lens Concentrators for Solar Water Heaters: A Case Study in Tropical Climates

this paper discusses the application of fresnel lens concentrator for solar water heater which is a case study in indonesia. the purpose of this study was to find an empirical equation of the relation...

Analysis of the Air Exchange in Livestock Building Through the Computational Fluid Dynamics

increasing consumption of meat and meat products worldwide is closely linked to improving the living environment for livestock. according to zoo experts, the appropriate microclimate in buildings lead...

On the Eventual Periodicity of Fractional Order Dispersive Wave Equations Using RBFS and Transform

in this research work, let's focus on the construction of numerical scheme based on radial basis functions finite difference (rbf-fd) method combined with the laplace transform for the solution of fra...

Development of A Rangefinding Method for Determining the Coordinates of Targets by A Network of Radar Stations in Counter-battery Warfare

the increase in the accuracy of determining the coordinates of targets is explained by the use of a network of counter-battery radar stations and the rangefinding method for determining the coordinate...

Analysis of the Architecture of the Hardware and Software Complex for Ground-based Ionosphere Radiosounding

the relevance of the study is conditioned by the need for qualitative consideration and analysis of the basic architectural principles taken as a basis for the development of a hardware and software c...

Synthesize and Characterization of Artificial Human Bone Developed by Using Nanocomposite

the combination of biopolymers with bioceramics plays vital role in development of artificial bone. hydroxyapatite is extensively used as a material in prosthetic bone repair and replacement. in this ...

Controllability and Stability Capacity of A Roll Pair Motion Research

the process of deriving the equation of the perturbed motion of a roll pair during the processing of leather material is discussed in the article, taking into account the influence of dynamic factors....

Development of Fully Superconducting 5 MW Aviation Generator with Liquid Hydrogen Cooling

the use of liquid hydrogen as a fuel will be inevitable in the aviation of the future. this statement means that manufacturers will also implement liquid hydrogen for cooling all superconducting aviat...

Numerical Simulation of Reynolds Number Effect of A Free Incompressible Isothermal Turbulent Coaxial Jet

this paper studies the effect of reynolds number on a two-dimensional free incompressible isothermal coaxial turbulent jet over a range of high reynolds numbers. this is necessary because of its appli...

Research on Calculation of Grinding Surface Roughness

in machining processes, grinding is often chosen as the final machining method. grinding is often chosen as the final machining method. this process has many advantages such as high precision and low ...

Numerical Simulation of Nitrogen Oxide Formation in Dust Furnaces

even though natural sources of air pollution account for over 50 % of sulphur compounds, 93 % of nitrogen oxide which are the most dangerous artificial anthropogenic sources of air pollution...

The Effect of Milling TIME on the Alumina Phase Transformation in the AMCs Powder Metallurgy Reinforced by Silica-sand-tailings

this study aims to determine the effect of milling time and sintering temperature parameters on the alumina transformation phase in the manufacture of aluminium matrix composites (amcs) reinforced by ...

Research on Selection of Abrasive Grain Size and Cutting Parameters When Grinding of Interrupted Surface Using Aluminum Oxide Grinding Wheel with Ceramic Binder

in this article, a study on intermittent surface grinding using aluminum oxide grinding wheel with ceramic binder is presented. the testing material is 20xh3a steel (gost standard – russian federation...

The Effect of Adding Natural Materials Waste on the Mechanical Properties and Water Absorption of Epoxy Composite Using Grey Relations Analysis

recently, there has been a tendency for scientific studies to deal with natural materials as fillers and reinforcement for polymer composites, which are used in many different applications due to thei...

Improvement the Performance of Composite PCM Paraffin-based Incorporate with Volcanic Ash as Heat Storage for Low-temperature Application

paraffin is well known thermal energy storage with the high latent heat of fusion. unfortunately, low thermal conductivity and low melting temperature inhibit large-scale applications for lower temper...

Method for Predicting the Dissemination of Hazardous Substances in the Soil During Long-term Storage of Galvanic Waste

the problem of production waste storage in open areas of an enterprise with a galvanic shop for the production of chips and microchips has been investigated. the composition of the sludge obtained aft...

Development of A Method for the Combined Control of the Hardness of Winding Textile Package

analysis of methods for determining the hardness of the winding shows that all existing methods require a lot of labor and time. when measuring the layer-by-layer hardness, the known methods do not al...

Research of Collision Properties of the Modified UMAC Algorithm on Crypto-code Constructions

the transfer of information by telecommunication channels is accompanied by message hashing to control the integrity of the data and confirm the authenticity of the data. when using a reliable hash fu...

Implementation of A Fuzzy Decision Support System for Selection of Hand Tractor Assembly Suppliers

supplier selection is a complex problem in the current industry 4.0 era. the large number of suppliers with different performance qualities makes it difficult for the company's internal part...

Increasing the Mechanical Properties of Structural Cast Iron for Machine-building Parts by Combined Mn – Al Alloying

the object of research in this work was cast iron for machine-building parts, alloyed with al. the possibility of improving the mechanical properties of cast iron by choosing the optimal mn – al combi...