3D-Olympics And Computer Design Competition in Technical Universities Programs

2015 ◽  
Vol 3 (2) ◽  
pp. 52-59 ◽  
Author(s):  
Вельтищев ◽  
Vitaliy Weltishev
Keyword(s):  
Computer Aided Design ◽  
Geometric Modeling ◽  
Surface Modeling ◽  
Practical Training ◽  
Training Methods ◽  
Significant Activity ◽  
Computer Design ◽  
Self Study ◽  
Design Competition ◽  
Design Solutions

The author shares his experience of training 3D geometric design competition for technical objects using modern of CAD-systems. It proposed the idea of development of creative abilities of students in the process of learning the basics of geometric modeling by incorporating elements of the structure of the training methods of self-development. It is noted that the principle of competition among the students in the group, encourages the pursuit of the study of modern packages and the acquisition of new skills. Created aimed at the development of creative abilities formation technique Olympiad learning objectives based on the real experience of designing in engineering offices and proposed a new form of training for a competition at the expense of an additional self-study students. As the experience of the first 3D-competitions, the task of a typical section of the course of the IG does not attract active and creative students who want to learn to work at a high level and modern packages. Systematic preparation for the 3D-competition is a necessary and very useful tool to stimulate and self-study of the subject as "Fundamentals of geometric modeling." This subject is not in the programs of universities, but it is indispensable. The tasks of the Olympiad are encouraged to include practical design solutions, both in the solid state, and in surface modeling. In more complex tasks with surface modeling is particularly interesting to students. They seek to independently study the theoretical and practical side of the work in computer-aided design packages, so the competition celebrated its significant activity. In tasks you are offered the use of standard methods of practical surface modeling to create the technical and design form the projections and conceptual sketches. The article gives examples of practical solutions, which can be seen a high level of theoretical and practical training of participants in 3D geometric design competition, there is speed of execution of tasks and the ability to solve professional design solutions.

scholarly journals Geometric Modeling of the Valencia Orange (Citrus sinensis L.) by Applying Bézier Curves and an Image-Based CAD Approach

Agriculture ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 313
Author(s):  
Hector A. Tinoco ◽  
Daniel R. Barco ◽  
Olga Ocampo ◽  
Jaime Buitrago-Osorio
Keyword(s):  
Computer Aided Design ◽  
Citrus Sinensis ◽  
Geometric Modeling ◽  
Prediction Models ◽  
Two Dimensions ◽  
Radius Of Curvature ◽  
Computer Design ◽  
Bezier Curves ◽  
Bézier Curves ◽  
Valencia Orange

The computer-aided design of fruits are used for different purposes, e.g., to determine mechanical properties by applying engineering simulations, to design postharvest equipment, and to study the natural changes related to the topology. This paper developed a methodology to model Valencia orange (Citrus sinensis), applying Bézier curves and an image-based CAD approach; the orange geometry was designed for different ripening stages. In the modeling process, a 3D construction was carried out using third-order Bézier curves, adjusted to the images taken in orthogonal planes. Four control points defined each profile to compose the geometric pattern of the orange, with geometric errors lower than 3%. Two prediction models were proposed to relate the orthogonal dimensions with a factor size; this means that two dimensions out of three can be predicted. The results showed that the shape ratios kept constant in any ripening stage; however, the radius of curvature evidenced differences in the analyzed shape profiles. The methodological framework presented in the paper might be used to draw other types of citrus fruits. This contribution is a tool to model fruits in 3D, instead of using expensive technological equipment, since it is only necessary to apply computer design tools.

scholarly journals SURFACE MODELING FOR CAD/CAM BASED ON NURBS

2011 ◽  
Vol 14 (4) ◽  
pp. 44-52
Author(s):  
Hien Tat Le ◽  
Hung Xuan Nguyen ◽  
Cang Trong Vo
Keyword(s):  
Computer Aided Design ◽  
Geometric Modeling ◽  
Surface Modeling ◽  
Digital Design ◽  
Nurbs Surface ◽  
Computer Aided ◽  
Modeling Techniques ◽  
Cad Cam ◽  
Numerical Performance ◽  
Aided Design

In the digital design process, surface modeling is required to be as accurate as possible for the effective support of production as well as for numerical performance analysis. This article reviews the geometric modeling techniques, based on non-uniform rational B-spline (NURBS). The NURBS surface can be readily translated into many CAD/CAM packages (Computer Aided Design/Computer Aided Manufacturing), which is more convenient for visualization performance and finite element methods.

3D Printing & Pharmaceutical Manufacturing: Opportunities and Challenges

2016 ◽  
Vol 5 (01) ◽  
pp. 4723 ◽  
Author(s):  
Bhusnure O. G.* ◽  
Gholve V. S. ◽  
Sugave B. K. ◽  
Dongre R. C. ◽  
Gore S. A. ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Tissue Engineering ◽  
3D Printing ◽  
Computer Aided Design ◽  
Patient Specific ◽  
Computer Design ◽  
3D Scaffolds ◽  
Engineering Research ◽  
Advantages And Disadvantages ◽  
Computer Aided

Many researchers have attempted to use computer-aided design (C.A.D) and computer-aided manufacturing (CAM) to realize a scaffold that provides a three-dimensional (3D) environment for regeneration of tissues and organs. As a result, several 3D printing technologies, including stereolithography, deposition modeling, inkjet-based printing and selective laser sintering have been developed. Because these 3D printing technologies use computers for design and fabrication, and they can fabricate 3D scaffolds as designed; as a consequence, they can be standardized. Growth of target tissues and organs requires the presence of appropriate growth factors, so fabrication of 3Dscaffold systems that release these biomolecules has been explored. A drug delivery system (D.D.S) that administrates a pharmaceutical compound to achieve a therapeutic effect in cells, animals and humans is a key technology that delivers biomolecules without side effects caused by excessive doses. 3D printing technologies and D. D. Ss have been assembled successfully, so new possibilities for improved tissue regeneration have been suggested. If the interaction between cells and scaffold system with biomolecules can be understood and controlled, and if an optimal 3D tissue regenerating environment is realized, 3D printing technologies will become an important aspect of tissue engineering research in the near future. 3D Printing promises to produce complex biomedical devices according to computer design using patient-specific anatomical data. Since its initial use as pre-surgical visualization models and tooling molds, 3D Printing has slowly evolved to create one-of-a-kind devices, implants, scaffolds for tissue engineering, diagnostic platforms, and drug delivery systems. Fuelled by the recent explosion in public interest and access to affordable printers, there is renewed interest to combine stem cells with custom 3D scaffolds for personalized regenerative medicine. Before 3D Printing can be used routinely for the regeneration of complex tissues (e.g. bone, cartilage, muscles, vessels, nerves in the craniomaxillofacial complex), and complex organs with intricate 3D microarchitecture (e.g. liver, lymphoid organs), several technological limitations must be addressed. Until recently, tablet designs had been restricted to the relatively small number of shapes that are easily achievable using traditional manufacturing methods. As 3D printing capabilities develop further, safety and regulatory concerns are addressed and the cost of the technology falls, contract manufacturers and pharmaceutical companies that experiment with these 3D printing innovations are likely to gain a competitive edge. This review compose the basics, types & techniques used, advantages and disadvantages of 3D printing

scholarly journals Advances in Engineering Graphics: Improvements and New Proposals

Symmetry ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 827
Author(s):  
José Ignacio Rojas-Sola
Keyword(s):  
Computer Animation ◽  
Computer Aided Design ◽  
Geometric Modeling ◽  
Correct Interpretation ◽  
Special Issue ◽  
Engineering Graphics ◽  
Communication Techniques ◽  
Graphic Communication ◽  
Graphic Language ◽  
Aided Design

The study of graphic communication techniques that engineers, architects, and designers use to express ideas and concepts, or the graphic expression applied to the design process, is becoming increasingly important. The correct interpretation of graphic language allows the development of skills in the training of an engineer or architect. For this reason, research on this topic is especially valuable in finding improvements or new proposals that help toward a better understanding of those techniques. This Special Issue shows the reader some examples of different disciplines available, such as engineering graphics, industrial design, geometric modeling, computer-aided design, descriptive geometry, architectural graphics and computer animation.

Geometric Modeling of Ceramics Dendrites to Modulate Energy and Material Flows by Using Stereolithography

2014 ◽  
Vol 783-786 ◽  
pp. 2439-2444 ◽  
Author(s):  
Soshu Kirihara
Keyword(s):  
Computer Aided Design ◽  
Geometric Modeling ◽  
Lattice Structure ◽  
Photonic Band Gap ◽  
Ultra Violet ◽  
Terahertz Time Domain Spectroscopy ◽  
Cross Sectional ◽  
Air Atmosphere ◽  
Micro Patterning ◽  
Micro Pattern

Through computer aided design, manufacturing and evaluation, various ceramics dendrites with spatially ordered micro cavities were successfully fabricated by utilizing stereolithography. Micrometer order ceramic lattices were propagated spatially in computer graphic space. Ceramics nanoparticles were dispersed in to photo sensitive liquid resins to obtain thixotropic slurries. The paste material was spread on a grass substrate by using a mechanical knife edge, and an ultra violet micro pattern was exposed to create cross sectional solid layer. After the layer stacking process, the obtained composite precursor was dewaxed and sintered in an air atmosphere. By the micro patterning stereolithography, solid electrolyte dendrites of yttria stabilized zirconia with spatially ordered porous structures were fabricated for fuel cell miniaturizations. Gaseous fluid profiles and pressure distributions in the formed ceramic lattices with various porosity percent were visualized and analyzed by a finite element method. Subsequently, alumina micro photonic crystals with a diamond lattice structure were fabricated. Electromagnetic wave properties were measured by using a terahertz time domain spectroscopy. A complete photonic band gap was exhibited, and a localized mode to select the wavelength was obtained by introducing a defect cavity.

scholarly journals Analysis on the Effect of Protective Equipment Training on Hospital Infection Managers

CONVERTER ◽  
2021 ◽  
pp. 211-219
Author(s):  
Yongli Zou Et al.
Keyword(s):  
Personal Protective Equipment ◽  
Protective Clothing ◽  
Training Model ◽  
Hospital Infection ◽  
Protective Equipment ◽  
Practical Training ◽  
Training Methods ◽  
Before And After ◽  
Improper Use ◽  
Expert Theory

Objectives: To analyze the effect of personal protective equipment training on new hospital infection managers. Methods: Personnel are divided into two batches by region. Adopt a diversified training model to train all personnel, finally conduct practical assessments and issue certificates. Collect information through information technology, analyze questionnaires, and understand trainees’ circumstances before and after the training. Each training batch has uniform teachers and the same training methods. Results: After the training, the trainees' proficiency in putting on and taking off protective equipment increased by 22.85%, and ability to choose protective equipment according to different working environments increased by 22.04%; 78.23% trainees believed that practical exercises should be emphasized. Taking off protective clothing was considered as the most difficult link in practical training (91.13%), followed by putting on protective clothing (70.43%). 96.24% trainees believed that this training is helpful for future work. Conclusions: It is quite necessary to implement personal protective equipment training among new hospital infection managers; where, practical training, assessment, information-based questionnaire survey, expert theory teaching have achieved good results; the training helps reduce occupational exposure-induced hospital infection, and at the same time, avoids improper use of protective materials and waste.

A Multi-User Computer-Aided Design Competition: Experimental Findings and Analysis of Team-Member Dynamics

2017 ◽  
Vol 17 (3) ◽  
Author(s):  
Brett Stone ◽  
John Salmon ◽  
Keenan Eves ◽  
Matthew Killian ◽  
Landon Wright ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Value Added ◽  
Future Research ◽  
Calendar Time ◽  
Competition Analysis ◽  
Computer Aided ◽  
Design Competition ◽  
Purdue Spatial Visualization Test ◽  
Experimental Findings ◽  
Aided Design

A competition for teams of three students using a prototype multi-user computer-aided design (MUCAD) tool was held to investigate various hypotheses regarding the performance of teams in such a setting. By comparing models from the competition to the same model in a single-user CAD environment, it is seen that use of a MUCAD system can significantly increase the value-added per unit of calendar time for a modeling effort. An investigation was also made into the causes of the performance differences among the various MUCAD teams which participated in the competition. Analysis of the results shows that teams that encouraged effective forms of communication and teams whose members scored similarly on the Purdue Spatial Visualization Test: Visualization of Rotations (PSVT:R) performed better than other teams. Areas of future research in analyzing teams in MUCAD environments are suggested.

Curve and Surface Modeling with Uncertainties Using Dual Kriging

1999 ◽  
Vol 121 (2) ◽  
pp. 249-255 ◽  
Author(s):  
A. Limaiem ◽  
H. A. ElMaraghy
Keyword(s):  
Measurement Errors ◽  
Geometric Modeling ◽  
Curve Surface ◽  
Tolerance Analysis ◽  
Kriging Model ◽  
Surface Modeling ◽  
Kriging Interpolation ◽  
Average Deviation ◽  
Dual Kriging ◽  
Potential Applications

This paper presents a new technique based on dual Kriging interpolation for modeling curves and surfaces in the presence of uncertainties in data points. Uncertainties result from measurement errors; therefore, a direct application of this method is found in curve/surface modeling using discrete sets of digitized points. It focuses on a common problem in geometric modeling, the trade-off between curve/surface smoothness and the approximation errors. The Kriging model filters the noise in the data while controlling the deviation locally at each point. However, the classical least-squares technique minimizes the average deviation, hence allowing only a global control of the model. The presented method generates smoother and more accurate representation of the actual curve or surface. It has potential applications in reverse engineering, NC machining, computer-aided inspection and tolerance analysis and verification. Examples of a computer mouse and a portion of the hood of a scaled-down car are presented for illustration.

scholarly journals Acquisition of Knowledge and Practical Skills after a Brief Course of BLS-AED in First-Year Students in Nursing and Physiotherapy at a Spanish University

2019 ◽  
Vol 16 (5) ◽  
pp. 766 ◽  
Author(s):  
Carlos Méndez-Martínez ◽  
Santiago Martínez-Isasi ◽  
Mario García-Suárez ◽  
Medea Aglaya De La Peña-Rodríguez ◽  
Juan Gómez-Salgado ◽  
...  
Keyword(s):  
Basic Life Support ◽  
Life Support ◽  
Quality Criteria ◽  
Western World ◽  
First Year ◽  
Practical Training ◽  
Theoretical Knowledge ◽  
Training Methods ◽  
Practical Skills ◽  
Cross Sectional

Out-of-hospital cardiorespiratory arrest is one of the leading causes of death in the Western world. Early assistance with quality Cardiopulmonary Resuscitation (CPR) and the use of a defibrillator may increase the percentage of survival after this process. The objective of this study was to evaluate the effect of CPR training and the management of an Automatic External Defibrillator (AED). A descriptive, cross-sectional, observational study was carried out among students in the first year of a Nursing and Physiotherapy degree of the University of León. To achieve this goal, a theoretical-practical educational intervention of four hours’ duration which included training on CPR, AED and Basic Life Support (BLS) was carried out. A total of 112 students were included. The results showed an increase in theoretical knowledge on BLS as well as on CPR and AED, and practical skills in CPR and AED management. A theoretical exposition of fifteen minutes and the practical training of CPR wasenough for the students to acquire the necessary theoretical knowledge, although the participants failed to reach quality criteria in CPR. Only 35.6% of students reached the right depth in compressions. Also, ventilation was not performed properly. Based on the results, we cannot determine that the percentage of overall quality of CPR was appropriate, since 57.6% was obtained in this respect and experts establish a value higher than 70% for quality CPR. There was a clear relationship between sex, weight, height and body max index (BMI), and quality CPR performance, being determinant variables to achieve quality parameters. Currently, Basic Life Support training in most universities is based on training methods similar to those used in the action described. The results obtained suggest implementing other training methods that favour the acquisition of quality CPR skills.

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