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Practical Numerical Acoustics
Published in David A. Bies, Colin H. Hansen, Carl Q. Howard, Engineering Noise Control, 2018
David A. Bies, Colin H. Hansen, Carl Q. Howard
A boundary element analysis will be conducted using the FastBEM software. The initial step is to create the boundary element mesh of the box. An Ansys script is shown below that can be used to create a box, and mesh the surfaces of the box with (rectangular) quadrilateral SHELL63 elements. The model is then exported as an Ansys archive file that has a filename extension .cdb. The model created in the Ansys software comprises rectangular shaped elements. However, when the mesh is imported into FastBEM, each rectangular element on the surface of the box is divided into 2 triangular elements. Note that the rule of thumb is that there should be at least 6 elements per wavelength (Marburg, 2002). For an analysis at 200 Hz, the elements should be smaller than c/(6f) = 343/1200 = 0.258 m, and so for this example, the nominal element size selected is 0.25 m.
Logic and Multimedia Production
Published in Mark Cousins, Russ Hepworth-Sawyer, Logic Pro 9, 2012
Mark Cousins, Russ Hepworth-Sawyer
The input arrangement should follow logically the output assignments and is used for making 5.1 recordings. The bounce extensions tab simply refers to the filename extension which is important when preparing for mastering. Concentrating on the Output tab, you can select how Logic shows its outputs. Typically, this will default to Logic’s own interpretation of 5.1. There are options for International Telecommunications Union’s (ITU) and WG-4’s output arrangements. The ITU’s is standard for 5.1 surround sound for most professionals. However, the WG-4 standard, which can be selected by the button below, is the choice of the DVD forum. At this stage, it is just important that the right outputs are connected to the correct speakers for accurate monitoring.
Addressing in SIP
Published in Radhika Ranjan Roy, Handbook on Session Initiation Protocol, 2018
The play= parameter is mandatory and must be present. All other parameters are optional. Some encodings are not self-describing. Thus, the implementation relies on filename extension conventions for determining the media type. It should be noted that RFC 3261 implies that proxies are supposed to pass parameters through unchanged. However, be aware that nonconforming proxies may strip Request-URI parameters. In this case, the implementation needs to take care of this. For example, the proxy inserting the parameters is the last proxy before the media server.
Usability of 3D anthropometrical data in CAD/CAM patterns
Published in International Journal of Fashion Design, Technology and Education, 2018
Inga Dāboliņa, Ausma Viļumsone, Jānis Dāboliņš, Eugenija Strazdiene, Eva Lapkovska
One of the problems which affect automation of designing process is the gap between the scanning system and the pattern-making system. The gathered measurements of human body are saved in a file isolated from the CAD/CAM systems. They can be viewed in the scanner software, processed by MS Excel and other software, which allow us to view files with filename extension *.ascii.csv. Data processing is a lengthy, monotonous routine job demanding high precision, attention and accuracy by the specialist. For this research, from more than 140 data, 23 of the data necessary for designing are to be selected. Automation of such work would allow us to design immediately after the gathering of anthropometric data. In order to automatise the data-extraction process, a scheme has been elaborated according to the process diagram (Figure 3(a)). The program reads initial (scanned) data file strings, and then divide them into elements in accordance with conditional separator (all data in the file measures.ascii.csv are separated with a coma). After that data are saved in the system in accordance with the data of measurement charts of the CAD system (file extension *.mas).
Thermal Decomposition Mechanism of Nitroglycerin by ReaxFF Reactive Molecular Dynamics Simulations
Published in Combustion Science and Technology, 2021
Tao Zeng, Rongjie Yang, Jianmin Li, Weiqiang Tang, Dinghua Li
A self-written perl (filename extension) script is applied to analyze the trajectory files obtained during the ReaxFF simulations. After reading in the trajectory files, the chemical bonds are calculated and the molecules are assigned for each frame structure. In each frame, the output molecules are written in a mol (filename extension) format file one by one and InChI (The International Union of Pure and Applied Chemistry (IUPAC) gives the unique identification code for the chemical structure of each compound) (Heller et al. 2013) analysis is performed using Openbabel (The Open Source Chemistry Toolbox) (O’Boyle et al. 2011) to determine the unique identifier of the molecule. According to InChI markers, the number, species and structure of molecules are counted and output.