scholarly journals Recent software environment in computer simulation.

1993 ◽  
Vol 43 (10) ◽  
pp. 556-563
Author(s):  
Hiroshi SAKUTA
Keyword(s):  
Computer Simulation ◽  
Software Environment

scholarly journals Study of CPM Device used for Rehabilitation and Effective Pain Management Following Knee Alloplasty

2017 ◽  
Vol 22 (1) ◽  
pp. 241-251 ◽  
Author(s):  
R. Trochimczuk ◽  
T. Kuźmierowski ◽  
P. Anchimiuk
Keyword(s):  
Computer Simulation ◽  
Pain Management ◽  
Computer Simulations ◽  
Control Strategy ◽  
Virtual Model ◽  
Software Environment ◽  
Motion Parameters ◽  
Anatomical Atlas ◽  
Laboratory Prototype ◽  
Selection Of

Abstract This paper defines the design assumptions for the construction of an original demonstration of a CPM device, based on which a solid virtual model will be created in a CAD software environment. The overall dimensions and other input parameters for the design were determined for the entire patient population according to an anatomical atlas of human measures. The medical and physiotherapeutic community were also consulted with respect to the proposed engineering solutions. The virtual model of the CPM device that will be created will be used for computer simulations of changes in motion parameters as a function of time, accounting for loads and static states. The results obtained from computer simulation will be used to confirm the correctness of the design adopted assumptions and of the accepted structure of the CPM mechanism, and potentially to introduce necessary corrections. They will also provide a basis for the development of a control strategy for the laboratory prototype and for the selection of the strategy of the patient's rehabilitation in the future. This paper will be supplemented with identification of directions of further research.

scholarly journals Dynamic loading of the tank container on a flat wagon considering fittings displacement relating to the stops

2018 ◽  
Vol 234 ◽  
pp. 05002 ◽  
Author(s):  
Oleksij Fomin ◽  
Juraj Gerlici ◽  
Alyona Lovskaya ◽  
Mykola Gorbunov ◽  
Kateryna Kravchenko ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Computer Simulation ◽  
Dynamic Loading ◽  
The Finite Element Method ◽  
Fisher Criterion ◽  
Software Environment ◽  
Supporting Structure ◽  
Regulatory Documents ◽  
Technological Gap ◽  
The One

The mathematical modelling of the dynamic loading of the container-tank during maneuvering collision of the flat wagon has made it possible to obtain an accurate value of the accelerations acting on its supporting structure. At the same time, possible movements of the tank-container relative to the frame of the flat wagons due to the presence of a technological gap in the pair “fitting stop-fitting” are taken into account. It is established that this acceleration, which is a component of the dynamic load, exceeds the one permitted by the regulatory documents. A computer simulation of the dynamic loading of the tank container in the CosmosWorks software environment was also carried out. The calculation was carried out using the finite element method. The results of the simulation made it possible to determine the distribution fields of the accelerations acting on the supporting structure of the tank-container during the shunting of the flat wagon, as well as their numerical values. Checking the adequacy of the mathematical and computer models using the Fisher criterion allowed us to conclude that the hypothesis of adequacy is not rejected.

Analysis of the Results of Reconstructive and Restorative Operations in Post-Traumatic Orbital Defects by Computer Simulation

2021 ◽  
pp. 33-40
Author(s):  
Sergiy O. Rykov ◽  
Yurii V. Chepurnyi ◽  
Andrii V. Kopchak ◽  
Oksana V. Petrenko ◽  
Denis M. Chernogorskyi ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Treatment Effectiveness ◽  
Maxillofacial Surgery ◽  
Software Environment ◽  
Orbital Volume ◽  
Orbital Wall ◽  
Before And After ◽  
Post Traumatic ◽  
Ct Data ◽  
Orbital Defects

Treatment of patients with post-traumatic orbital defects is relevant problem of ophthalmology and maxillofacial surgery. Residual diplopia or dislocation of the eyeball leads to disability, social maladaptation and development of psychoemotional disorders in patients. In this paper, we present an evaluation of treatment of patients with posttraumatic orbital wall defects based on the retrospective comparative analysis of CT data by computer simulation before and after reconstruction. When comparing the volume of the injured orbits before and after the operation (average volume difference was 2.7 ± 0.9 cm3), a significant improvement was found in terms of recovery of the orbital volume. The factors influencing the treatment effectiveness were determined based on the calculation of the volume of the orbits on the healthy and injured side in the software environment before and after the reconstruction. The causes of the detected cases of incomplete recovery of the orbital volume were analyzed. The solution to the problem of restoring the orbital volume is in the plane of restoring the geometry of the orbit because previous adaptation of the shape of the standard plate to its anatomical structure with overlapping defect on the stereolithographic model provided the best end result. Conclusions. Personalized adaptation of the implants to the shape of the orbit or individual production thereof can increase the accuracy of the orbital volume restoration, which can increase the effectiveness of eliminating complications such as enophthalmos and diplopia. The effectiveness of treatment of post-traumatic orbital defects by traditional methods directly depends on the severity of the damage, the degree of which determines the magnitude of the change in the orbital volume. However, the greater is the volume of the orbit changes as a result of the injury, the worse is the prognosis for its recovery. Development of the ways to individualize implants and evaluate their effectiveness is an important area for further research. Keywords: post-traumatic orbital defects, reconstructive surgery, computer simulation.

Hardening coatings of tool materials for turning of stainless steels

2021 ◽  
pp. 7-10
Author(s):  
B.Ya. Mokritsky
Keyword(s):  
Experimental Data ◽  
Computer Simulation ◽  
Tool Wear ◽  
Tool Life ◽  
Stainless Steels ◽  
Tool Material ◽  
Software Environment ◽  
Tool Materials ◽  
Hardening Coatings ◽  
Cutting Zone

The results of new tool materials designing for processing of stainless steels are presented, which allowed to increase the tool life up to 3 times. The studies are carried out with the integrated use of experimental data and computer simulation in the Deform software environment. The criteria by which modeling is feasible at sufficient level are identified: tool wear, temperature in the cutting zone, stresses in the tool material and tool material deformation.

scholarly journals Design of Thermoelectric Starting Pre-Heater on Gas Fuel

2019 ◽  
Vol 19 (3) ◽  
pp. 270-278
Author(s):  
M.V. Maksymuk
Keyword(s):  
Computer Simulation ◽  
Physical Model ◽  
Mathematical Description ◽  
Electric Energy ◽  
Comsol Multiphysics ◽  
Software Environment ◽  
Thermoelectric Converter ◽  
Ambient Temperatures ◽  
Gas Fuel

This paper presents the results of computer simulation of thermoelectric starting pre-heater on liquefied gasfuel for easier starting of vehicle engines under low ambient temperatures. The physical model of the heater ispresented, its mathematical description is given, the method and results of calculations of the main energy andstructural characteristics of the device in the software environment "Comsol Multiphysics" are presented.It is shown that the use of the thermoelectric converter as a source of electric energy provides autonomousoperation of the heater components and allows solving the problem of discharging the vehicle battery during theoperation of the pre-start equipment.

Characterization of Modulated Structure Through Structure Images and their Computer Simulation

1990 ◽  
Vol 48 (1) ◽  
pp. 70-71
Author(s):  
Kiyomichi Nakai ◽  
Yusuke Isobe ◽  
Chiken Kinoshita ◽  
Kazutoshi Shinohara
Keyword(s):  
Computer Simulation ◽  
High Resolution ◽  
Spherical Aberration ◽  
High Resolution Electron Microscopy ◽  
Basic Mechanism ◽  
Objective Lens ◽  
Specimen Thickness ◽  
Transmitted Beam ◽  
Modulated Structure ◽  
Resolution Electron

Induced spinodal decomposition under electron irradiation in a Ni-Au alloy has been investigated with respect to its basic mechanism and confirmed to be caused by the relaxation of coherent strain associated with modulated structure. Modulation of white-dots on structure images of modulated structure due to high-resolution electron microscopy is reduced with irradiation. In this paper the atom arrangement of the modulated structure is confirmed with computer simulation on the structure images, and the relaxation of the coherent strain is concluded to be due to the reduction of phase-modulation.Structure images of three-dimensional modulated structure along <100> were taken with the JEM-4000EX high-resolution electron microscope at the HVEM Laboratory, Kyushu University. The transmitted beam and four 200 reflections with their satellites from the modulated structure in an fee Ni-30.0at%Au alloy under illumination of 400keV electrons were used for the structure images under a condition of the spherical aberration constant of the objective lens, Cs = 1mm, the divergence of the beam, α = 3 × 10-4 rad, underfocus, Δf ≃ -50nm and specimen thickness, t ≃ 15nm. The CIHRTEM code was used for the simulation of the structure image.

Averting robo-bees: why free-flying robotic bees are a bad idea

2019 ◽  
Vol 3 (6) ◽  
pp. 723-729
Author(s):  
Roslyn Gleadow ◽  
Jim Hanan ◽  
Alan Dorin
Keyword(s):  
Climate Change ◽  
Computer Simulation ◽  
Food Security ◽  
European Countries ◽  
Plant Interactions ◽  
Plant Insect Interactions ◽  
Native Habitat ◽  
Insect Pollinators ◽  
Insect Interactions

Food security and the sustainability of native ecosystems depends on plant-insect interactions in countless ways. Recently reported rapid and immense declines in insect numbers due to climate change, the use of pesticides and herbicides, the introduction of agricultural monocultures, and the destruction of insect native habitat, are all potential contributors to this grave situation. Some researchers are working towards a future where natural insect pollinators might be replaced with free-flying robotic bees, an ecologically problematic proposal. We argue instead that creating environments that are friendly to bees and exploring the use of other species for pollination and bio-control, particularly in non-European countries, are more ecologically sound approaches. The computer simulation of insect-plant interactions is a far more measured application of technology that may assist in managing, or averting, ‘Insect Armageddon' from both practical and ethical viewpoints.

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