scholarly journals Agustín de Betancourt’s Optical Telegraph: Geometric Modeling and Virtual Reconstruction

2020 ◽  
Vol 10 (5) ◽  
pp. 1857 ◽  
Author(s):  
José Ignacio Rojas-Sola ◽  
Eduardo De la Morena-De la Fuente

This article shows the geometric modeling and virtual reconstruction of the optical telegraph by Agustín de Betancourt and Abraham Louis Breguet developed at the end of the 18th century. Autodesk Inventor Professional software has been used to obtain the three-dimensional (3D) model of this historical invention and its geometric documentation. The material for the research is available on the website of the Betancourt Project of the Canary Orotava Foundation for the History of Science. Thanks to the three-dimensional modeling performed, it has been possible to explain in detail both its operation and the assembly system of this invention in a coherent way. After carrying out its 3D modeling and functional analysis, it was discovered that the transmissions in the telegraph were not performed by hemp ropes but rather by metal chains with flat links, considerably reducing possible error. Similarly, it has also been found that the use of the gimbal joint facilitated the adaptability of the invention to geographical areas where there was a physical impediment to the alignment of telegraph stations. In addition, it was not now necessary for the telescope frames to be located parallel to the mast frame (frame of the indicator arrow) and therefore they could work in different planes.

Author(s):  
Andrea Arena ◽  
Arnaldo Casalotti ◽  
Walter Lacarbonara ◽  
Matthew P. Cartmell

This work deals with three-dimensional (3D) modeling of container cranes including the hoisting cable length commands. The proposed models allow to effectively study the 3D motion caused by the eccentricity of initial conditions or loading conditions such as those induced by wind. The container is modeled as a 3D rigid body while the hoisting cables are treated either as inextensible trusses or as linearly elastic straight, taut cables. The 3D model with inextensible cables is shown to coalesce into existing two-dimensional models under the relevant planarity constraints. Details about the treatment of the internal inextensibility constraints are discussed. Time-marching simulations are carried out to show representative 2D and 3D responses to initial conditions and commanded motion of the trolley. The main differences between the constrained model and that with the elasticity of the cables are highlighted in the framework of a few significant design scenarios.


2014 ◽  
Vol 644-650 ◽  
pp. 4121-4124
Author(s):  
Qiang Chen ◽  
Li Mei Xu

This paper mainly studies modeling and recognition of 3D English words’ images. With the development of secondary modeling, segmentation and recognition theories and the application of evolution computation in 3D modeling and recognition, this paper analyzes the issues of parameter fitting in the 3D model, multi-object scene segmentation and parts recognition aiming at the 3D data features in the English words. The 3D model is used as the primitives part to model and segment the scenes and the group parallel evolution and the relationship matching theories are introduced into the 3D modeling and recognition to deeply identify the rare English words’ images. The paper searches for a practical and efficient three-dimensional modeling and identification scheme.


2013 ◽  
Vol 655-657 ◽  
pp. 245-248
Author(s):  
Qing Quan Li ◽  
Hai Tao Wu ◽  
Hong Bin Liu ◽  
Jie Liu

Established the model of multifunctional office chair for fitness, using 3D modeling software Solidworks, finished the 3D model of parts and parts assembly according to the design requirements of multifunctional office chair, visually and efficientlly. Importantly, this chair is the combination of fitness and massage function. So it is practical and cnvenient to the office crowd.


2021 ◽  
pp. 6-14
Author(s):  
N.P. KARPENKO ◽  
◽  
M.A. SHIRYAEVA

The method of three-dimensional model in the system of computer modeling MathCad and Autodesk 3ds Max by categories of total soil pollution is developed. A visualization block and an analytical block have been developed which are based on calculated mathematical models for analyzing and evaluating the environmental situation, risks, and environmental safety of the territory. Three-dimensional models of relief mapping of the Pekhorka river fl oodplain are constructed by integrating them with the help of a programming environment and optimized 3D modeling programs. Three-dimensional models with total soil contamination for water body sections are constructed. On the example of some sections of the catchment area of the Pekhorka river in the Balashikha region, models with soil contamination by the total ZC indicator were created. The development of 3D modeling techniques allows you to create predictive scenarios more accurately with a high degree of detail, as well as quickly approach the solution of environmental problems. Optimization of three-dimensional modeling in the fi eld of problems related to the catchment area contributes to the further operational solution of problems of rational land use and improvement of the environmental situation.


2019 ◽  
Author(s):  
Alexander Bashkatov

The tutorial is an introductory course to the study of the basics of geometric modeling for 3D printing using the programming language OpenSCAD and is built on the basis of descriptions of instructions for creating primitives, determining their properties, carrying out transformations and other service operations. It contains a large number of examples with detailed comments and description of the performed actions, which allows you to get basic skills in creating three-dimensional and flat models, exporting and importing graphical data. Meets the requirements of the Federal state educational standards of higher education of the last generation. It can be useful for computer science teachers, students, students and anyone who is interested in three-dimensional modeling and preparation of products for 3D printing.


2017 ◽  
Vol 5 (3) ◽  
pp. 74-79 ◽  
Author(s):  
Vladimir E. Baskov ◽  
Alexei G. Baindurashvili ◽  
Anastasia V. Filippova ◽  
Dmitry B. Barsukov ◽  
Andrey I. Krasnov ◽  
...  

Introduction. Three-dimensional (3D) modeling and prototyping are increasingly being used in various branches of surgery for planning and performing surgical interventions. In orthopedics, this technology was first used in 1990 for performing knee-joint surgery. This was followed by the development of protocols for creating and applying individual patterns for navigation in the surgical interventions for various bones. Aim. The study aimed to develop a new 3D method for planning and performing corrective osteotomy of the femoral bone using an individual pattern and to identify the advantages of the proposed method in comparison with the standard method of planning and performing surgical intervention. Materials and methods. A new method for planning and performing corrective osteotomy of the femoral bone in children with various pathologies of the hip joint is presented. The outcomes of planning and performing corrective osteotomy of the femoral bone in 27 patients aged 5 to 18 years (32 hip joints) with congenital and acquired deformity of the femoral bone were analyzed. Conclusion. The use of computer 3D modeling for planning and implementing corrective interventions on the femoral bone improves the treatment results owing to an almost perfect performance accuracy achieved by the minimization of possible human errors reduction in the surgery duration; and reduction in the radiation exposure for the patient.


2020 ◽  
pp. 36-40
Author(s):  
M. Pashynov ◽  
S. Pidbereznyy ◽  
S. Paskevych

The results of three-dimensional modeling of personnel work conditions in radiation-hazardous conditions of the ”Shelter” object, carried out using the software complex HVRC VRdose, are presented. Estimations of dosing loads on personnel during the dismantling of a metal farm on the roof of the ”Shelter” object are carried out. The obtained simulation data showed good convergence with the data obtained during the development of a working design for dismantling of this construction.


2021 ◽  
pp. 54-67
Author(s):  
Максим Сергеевич Можаров ◽  
Алена Сергеевна Огнева

Дается определение понятий творческих способностей, приведены методы использования трехмерного моделирования, применяемые в изобразительном искусстве и науке, учитывая последние данные в этой области деятельности. Материалом исследования послужили работы различных авторов в области развития творчества и креативности, а также материалы исследователей в области трехмерного моделирования. Их использование позволило изучить представления и наметить перспективы развития творческих способностей младших школьников. В творческом процессе продуктивные и репродуктивные компоненты мышления имеют непосредственную связь и возможность переходить от одного к другому. Благодаря этому может быть обеспечена эволюционная способность интеллектуальных систем, кроме того, умение воспроизводить, анализировать и конструировать, так как любая сложная система развивается на основе противоречивых свойств. Воображение опирается на несколько факторов, таких как восприятие, мышление и память. Данный психический процесс имеет особенность, которая заключается в том, что воображение свойственно только людям, которые способны модифицировать окружающий их мир, изменять реальность, а также создавать что-то новое. На сегодняшний день использование современных достижений в различных областях компьютерных технологий сильно распространено. Развивая творческое мышление, необходимо активно применять компьютерные технологии, такие как 3D-моделирование. Проанализированы существующие подходы к развитию пространственного мышления обучающихся начальной школы посредством методики формообразования, актуальные для разработки заданий по 3D-моделированию. Проиллюстрированы теоретические выводы на примере конкретных заданий, включающих: вопросы, требующие творческой деятельности; простые творческие задания на репродуктивном уровне; творческие проекты по 3D-моделированию. Задатки к творческим способностям присущи каждому младшему школьнику, поэтому нужно изначально готовить ребенка к поиску новых идей и нестандартных решений. Творческие способности не только развивают креативность, но и расширяют кругозор, формируют личностные качества, такие как инициатива, целеустремленность и настойчивость. The definition of the concepts of creativity is given, methods of using three-dimensional modeling used in the visual arts and science are given, taking into account the latest data in this field of activity. The research material was the work of various authors in the field of the development of creativity and creativity, as well as the materials of researchers in the field of three-dimensional modeling. Their use made it possible to study the ideas about the development of creativity in younger students. In the creative process, the productive and reproductive components of thinking have a direct connection and the ability to move from one to another. Thanks to this, the evolutionary ability of intelligent systems can be provided, as well as the ability to reproduce, analyze and design, since any complex system develops on the basis of contradictory properties. Imagination is intermediate between perception, thinking and memory. The peculiarity of this form of the mental process lies in the fact that imagination is peculiar only to people who are able to modify the world around them, change reality, and also create something innovative. Today, the use of modern advances in computer technology is freely distributed in many areas. In order to develop a person’s creative thinking, the use of computer technologies, including 3D modeling, plays a significant role. It can be noted that the need to develop creative thinking through 3D modeling is due to the fact that information technology will bring benefits in the field of national education. On the basis of the analyzed theoretical base, a system of tasks has been developed, including: questions requiring creative activity; simple creative tasks at the reproductive level; creative projects for 3D modeling. The inclinations to creativity are inherent in every younger student who needs to initially prepare the child for the search for new ideas and non-standard solutions. Creativity not only develops creativity, but also broadens the horizons, fosters personal qualities such as initiative, dedication and perseverance.


Mathematics ◽  
2021 ◽  
Vol 9 (24) ◽  
pp. 3325
Author(s):  
Valery Ochkov ◽  
Inna Vasileva ◽  
Ekaterina Borovinskaya ◽  
Wladimir Reschetilowski

This paper considers an approach towards the building of new classes of symmetric closed curves with two or more focal points, which can be obtained by generalizing classical definitions of the ellipse, Cassini, and Cayley ovals. A universal numerical method for creating such curves in mathematical packages is introduced. Specific aspects of the provided numerical data in computer-aided design systems with B-splines for three-dimensional modeling are considered. The applicability of the method is demonstrated, as well as the possibility to provide high smoothness of the curvature profile at the specified accuracy of modeling.


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