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In this communication, the sound absorption characteristics of rectangular-shaped plane space sound absorbers without any backing structure using permeable membranes (PMs) are measured by reverberation room method. First, three types of PMs, in this stud...
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Benjamin Lumantarna
Pág. pp. 77 - 82
This paper presents visual application of a finite element program for plane stress and plane strain problems. The elements used in this program are isoparametric triangular (three nodes) and rectangular (four nodes) and subparametric triangular (six nod...
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Gee-Soo Lee and Chan-Jung Kim
Microcracks of depth less than 200 µm in mechanical components are difficult to detect because conventional methods such as X-ray or eddy current measurements are less sensitive to such depths. Nonetheless, an efficient microcrack detection method is req...
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Oleksandr Paliukh,Petro Kyrychok,Ruslan Trishchuk,Maxym Korobka,Yevhenii Dziadyk
Pág. 80 - 90
An experimentally determined list of the required and sufficient technological operations to produce semi-hard book covers has been proposed, with the calculated contour and structural design, which implies strict tolerances in the deviations from a rect...
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Marek Lechman
Pág. 2411 - 2420
The paper presents a method for determining the resistance of cross-sections of reinforced concrete (RC) columns subjected to the axial force and bending. It takes account of the effect of concrete softening in plastic range and the mean compressive stre...
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Miljenko Lapaine
In previous papers that have dealt with cylindrical map projections as limiting cases of conical projections, standard or equidistant parallels were used in the derivations. This paper shows that this is not necessary and that it is sufficient to use par...
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Tarek S. Abdou, Rola Saad and Salam K. Khamas
This paper presents a novel 28 GHz circularly polarized rectangular dielectric-resonator antenna (DRA) array for millimeter-wave (mmWave) off-body applications. A feed network incorporating cross slots was utilized in the rectangular DRA design to realiz...
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Dimitrios Matthes and Vasileios Drakopoulos
Clipping algorithms essentially compute the intersection of the clipping object and the subject, so to go from two to three dimensions we replace the two-dimensional clipping object by the three-dimensional one (the view frustum). In three-dimensional gr...
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?.V. Strashnov,M.A. Torgashev
Pág. 40 - 49
This paper considers the task of collision detection for bounding cylinders surrounding the geometry of virtual objects with a terrain. To solve this task, an approach is proposed in which the cylinder is defined analytically, and the terrain is represen...
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Albert Willian Faria, Rodrigo Alves e Silva, Edson Hideki Koroishi
Pág. e39046
The present paper seeks to enhance the potential damage detention and location of the discrete wavelet transform (DWT) in a thin laminated composite damaged by a signal derived from vibration modes. The DWT-1D is used to spatially identify (x-y plane) th...
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Albert Willian Faria, Rodrigo Alves e Silva, Edson Hideki Koroishi (Author)
Pág. e39046
The present paper seeks to enhance the potential damage detention and location of the discrete wavelet transform (DWT) in a thin laminated composite damaged by a signal derived from vibration modes. The DWT-1D is used to spatially identify (x-y plane) th...
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Fatima Amin, Rashid Saleem, Tayyab Shabbir, Sabih ur Rehman, Muhammad Bilal and M. Farhan Shafique
This research work proposes a compact four-port multiple-input multiple-output (MIMO) antenna that operates in the whole license free ultra-wideband (UWB) spectrum of 3.1?10.6 GHz. Spatial diversity has been introduced by arranging these antennas in clos...
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Wei Chen, Hao Liu, Yang Tang and Junjie Liu
In this paper, a new practical electrostatic rotating bell (ESRB) cumulative rate model of painting is derived, and an experimental study on painting is carried out. First, the experimental method is used to obtain the radial thickness profile function o...
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R. Aguiar, D. Mora, M. Rodríguez
Pág. Page 37 - 53
CEINCI-LAB is a computer software developed using MATLAB for static or dynamic structural analysis, in a friendly way and simultaneously serves the user to reinforce structural knowledge. In this article the most important aspects are present to find the...
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Frederic M. Evers and Willi H. Hager
Slides generating impulse waves are currently generated using either block models or free granular material impacting a water body. These procedures were mainly developed to study plane impulse waves, i.e., wave generation in a rectangular channel. The c...
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Tae Young Ko and Sean Seungwon Lee
Rock fractures in geological conditions are caused not only by applied stress, but also by stress corrosion. Stress corrosion is an environmentally activated chemical process, associated with the fluid-assisted crack growth. Crack growth due to stress co...
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Ruoyu Wang, Xianjun Yu, Ke Zhao, Baojie Liu and Guangfeng An
The variable area bypass injector (VABI) plays a crucial role in variable cycle engines by regulating the flow mixing process in complex bypass ducts, and low-dimensional theoretical models are the key to revealing its working mechanism while estimating ...
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Kalyani Bhide and Shaaban Abdallah
Turbulence is governed by various mechanisms, such as production, dissipation, diffusion, dilatation and convection, which lead to its evolution and decay. In high-speed flows, turbulence becomes complicated due to compressibility effects. Therefore, the...
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Andrii Bomba,Mykhailo Boichura,Bohdan Sydorchuk
Pág. 45 - 54
A method for identifying parameters of the conductivity coefficient of objects is generalized for the case of reconstructing an image of a part of a soil massif from the tomography data of the applied quasipotentials. In this case, without diminishing th...
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Ivan Dubrovskiy,Valeriy Bucharskyi
Pág. 74 - 82
A method of extended cells for the formulation of boundary conditions in the numerical integration of the Euler equations in domains with curvilinear boundaries for the cases of one-dimensional and two-dimensional compressible gas flows has been proposed...
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