Location Of Structural Elements Research Articles

РОЗВИТОК ПРОСТОРОВОГО МИСЛЕННЯ УЧНІВ НА УРОКАХ КРЕСЛЕННЯ ЗАСОБАМИ ЦИФРОВИХ ТЕХНОЛОГІЙ

У статті досліджено шляхи і засоби цілеспрямованого розвитку просторового мислення учнів в умовах комп’ютерно-орієнтованого навчання креслення. Досліджено сутність та значення просторового мислення для всебічного розвитку особистості. З’ясовано можливості цифрових технологій (ЦТ) як засобу розвитку просторового мислення учнів на уроках креслення. Встановлено, що найбільш доцільним для розвитку просторового мислення учнів є використання комп’ютерних програмних засобів імітаційно-моделюючого типу.

Application of a fundamental solution to a problem operator for modeling vibrations of elastically supported load-bearing structures

The work is devoted to the construction of effective computational algorithms for modeling vibrations of elastically supported load-bearing systems. An approach is developed based on the representation of a mathematical model in the form of partial differential equations for generalized functions. With this approach, the presence of elements with a very high stiffness in the design made it necessary to carry out the calculation with a very small time step. To build a computational algorithm, a fundamental solution to the problem operator is used, which allows one to obtain a solution at the next time step for each point of the spatial grid independently. The need to carry out the calculation with a very small time step arises only in nodes that coincide with the location of structural elements with very high stiffness. The proposed approach allows simulating impact forces and instantaneous change of boundary conditions. The possibility of using the model with an absolutely rigid restraining support as a limit transition from a model of elastic bond of high rigidity was researched on.

Целевая геолого-промышленная оценка Тереблянской солянокупольной структуры (Закарпатье)

Tereblya salt structure is under consideration at different levels as one of geological objects for Transcarpathian salt industry recovery after emergency reduction of activities of the single salt-producing enterprise of the region in Solotvyno. Despite fulfilled detailed exploration of the Tereblya rock salt deposit towards the middle of the last century, its commercial significance had been staying indefinite until quite recently. This paper first presents the preliminary geological industrial assessment of the Tereblya salt massive by the results of specialized target oriented evaluation based on innovative methodological approaches to the study of salt massifs properties as objects of human made intervention. The basic methodical procedures of the geological industrial assessment performing are reinterpretation and expert harmonization of actual geological deposit data of various professional levels from different years and modern theoretical approaches to assessing of salt strata industrial characteristics, taking into account the established pattern of interconditionality of structural-lithological types of salt rocks and their operational and technological characteristics. Under rock salt research process, concept “functional evaluation” is used. It means finding of all properties of salt massive rock (functional) determining the possibility and expediency of its use for the creation of underground facilities for various purposes, namely raw material value and principal suitability for human-made intervention ensuring the minimization of environmental risks and protection of salt resources. Acknowledged methodological principles of target-oriented investigations of salt massifs environment by structural-lithological modeling have been used to identify spatial location of structural elements with different functional properties in the salt massif volume. Moreover the nomenclative assessment of modern rock salt reserves status has been accomplished as well as recommendations for reserves preparing to use have been developed. As a result of fulfilled geological industrial assessment the feasible uses of the salt structure have been indicated, promising sites for creation of exploration objects –by directions with an allowance for ecological-geological and techno-economic criteria for selection of favorable sites have been pointed, the options for investment decisions have been proposed. Furthermore, the minimum required complex of additional geological-technological testing of rock salt has been emphasized to make correct investment decisions and develop a detailed geological and economic assessment of this deposit.

Optimization of Piping Supports and Supporting Structure

Optimization of piping supports is a well-known problem. The paper considers the optimization of piping supports with respect to cost and the loads transmitted to the supporting structural elements, when the orientation of the supporting structure is to be determined. This is the case, when new structural elements need to be added to the existing building structure to support components and piping systems that come as a new addition to a nuclear plant. The analytical target cascading (ATC) method is used for the optimization, combining the support loads from different piping analyses in a hierarchical framework. It is shown that the ATC method can be used for an optimized location of structural elements simultaneously supporting complex piping systems and implemented in a structural analysis software.

Estimation of Some Admissible Deviations from Design Size and Location of Structural Elements of Quick-Release Fasteners of Natural Gas Cleaning Filter Separators

An estimation of admissible deviations of size and location of structural elements of quick-release fasteners of natural gas cleaning filter separators from the design is given. A generalized computational model for analyzing stress-strain state and strength of cheeks of securing unit of quick-release fasteners with deviations is substantiated. Stress-strain and strength analysis revealed insufficient strength margin of the cheeks in the most stressed section. A method is proposed for strengthening the cheeks without disassembling the securing unit, which ensures the required strength margin in this section.

Computing 1-D atomic densities in macromolecular simulations: The density profile tool for VMD

Molecular dynamics simulations have a prominent role in biophysics and drug discovery due to the atomistic information they provide on the structure, energetics and dynamics of biomolecules. Specialized software packages are required to analyze simulated trajectories, either interactively or via scripts, to derive quantities of interest and provide insight for further experiments. This paper presents the Density Profile Tool, a package that enhances the Visual Molecular Dynamics environment with the ability to interactively compute and visualize 1-D projections of various density functions of molecular models. We describe how the plugin is used to perform computations both via a graphical interface and programmatically. Results are presented for realistic examples, all-atom bilayer models, showing how mass and electron densities readily provide measurements such as membrane thickness, location of structural elements, and how they compare to X-ray diffraction experiments. Program summaryProgram title: Density Profile ToolCatalogue identifier: AEQM_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEQM_v1_0.htmlProgram obtainable from: CPC Program Library, Queen’s University, Belfast, N. IrelandLicensing provisions: yesNo. of lines in distributed program, including test data, etc.: 1742No. of bytes in distributed program, including test data, etc.: 12764Distribution format: tar.gzProgramming language: TCL/TK.Computer: Any, with or without graphical display.Operating system: Linux/Unix, OSX, Windows.RAM: VMD should be able to hold the trajectory in memory.Classification: 3, 23.External routines: VMD (version 1.9 or higher) (http://www.ks.uiuc.edu/Research/vmd/).Nature of problem:Compute and visualize one-dimensional density profiles of molecular dynamics trajectories in the VMD environment, either interactively or programmatically.Solution method:Density profiles are computed by binning the simulation space into slabs of finite thickness. A graphical user interface allows the choice of the atomic property (number, mass, charge, electrons) and the details of the binning.Restrictions:The current version only supports orthorhombic cells.Unusual features:The Density Profile Tool is not a standalone program but a plug-in that enhances VMD’s analysis features.Running time:A contemporary PC completes the analysis of 500 frames of the example system discussed in the paper (35,000 atoms) in under 1 min.

ASPHALT STABILIZATION OF RUBBLE SLOPES

During the spring of 1982 a new container terminal was under construction at the Port of Haina, Dominican Republic. Changes in design conditions due to damages to the protective breakwaters at the port entrance required modifications to the design of slope protection under the pier. The stabilization of the rubble slope was, in fact, a stop gap measure in that repairs would be instituted on the breakwaters in the near future. Due to a lack of suitable stone, the location of structural elements already in place and severe time constraints, an asphalt coating over relatively light weight rubble was selected to armor the slopes under the pier. The asphalt coating was prepared in a locally available batching plant and placed on-site using a crane equipped with a 4 cubic yard bucket. As a result of the use of the asphalt coating, construction delays were minimized and adequate slope protection was provided for the container pier without extensive design modifications. The purpose of this paper is to discuss the advantages and disadvantages of the use of asphalt in the construction of shore protection facilities in the context of the site specific application at the Port of Haina.