Theoretical Study on Stem Implants Behaviour

2012 ◽  
Vol 162 ◽  
pp. 92-97
Author(s):  
Carmen Sticlaru ◽  
Arjana Davidescu
Keyword(s):  
Hip Joint ◽  
3D Model ◽  
Theoretical Study ◽  
Stress And Strain ◽  
Ct Scanner ◽  
Persons With Disabilities ◽  
State Information ◽  
Hip Joint Endoprosthesis ◽  
Different Types ◽  
Two Stages

The paper presents a complex study on hip joint endoprosthesis. The model for the femur was obtained by CT scanner and Mimics, the endoprosthesis was designed in proEngineer. This study has two stages: obtaining the 3D model for the bone and endoprosthesis, analysing the model in Ansys to obtain stress and strain state information. The paper also presents some interesting aspects of the contact between the bone and the implant in case of different types of endoprosthesis (two standardized types and one personalized). A good contact between the bone and the stem indicates a long life solution for an endoprosthesis. A personalized stem is very useful for persons with disabilities is designed taking in consideration the particularities of the patient. The contact results from Ansys illustrate the aspects from the bone stem interface. With this information the orthopaedist can take better decisions for a proper hip joint endoprosthesis used for a named patient.

The study of the elastic deformation of a flexible wheel by a cam wave generator

2020 ◽  
Vol 65 (1) ◽  
pp. 51-58
Author(s):  
Sava Ianici
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Elastic Deformation ◽  
Theoretical Study ◽  
Elastic Field ◽  
The Finite Element Method ◽  
Elastic Deformations ◽  
Wave Generator ◽  
Two Stages

The paper presents the results of research on the study of the elastic deformation of a flexible wheel from a double harmonic transmission, under the action of a cam wave generator. Knowing exactly how the flexible wheel is deformed is important in correctly establishing the geometric parameters of the wheels teeth, allowing a better understanding and appreciation of the specific conditions of harmonic gearings in the two stages of the transmission. The veracity of the results of this theoretical study on the calculation of elastic deformations and displacements of points located on the average fiber of the flexible wheel was subsequently verified and confirmed by numerical simulation of the flexible wheel, in the elastic field, using the finite element method from SolidWorks Simulation.

ANALYSIS OF CONTACT PRESSURE BETWEEN THE PARTS OF TOTAL HIP JOINT ENDOPROSTHESIS WITH SHAPE DEVIATIONS

2007 ◽  
Vol 40 ◽  
pp. S558 ◽  
Author(s):  
V. Fuis ◽  
T. Návrat ◽  
P. Hlavon ◽  
M. Koukal ◽  
M. Houfek
Keyword(s):  
Contact Pressure ◽  
Hip Joint ◽  
Total Hip ◽  
Shape Deviations ◽  
Hip Joint Endoprosthesis

A novel two-stage method of plant seedlings classification based on deep learning

2021 ◽  
pp. 1-11
Author(s):  
Tianhong Dai ◽  
Shijie Cong ◽  
Jianping Huang ◽  
Yanwen Zhang ◽  
Xinwang Huang ◽  
...  
Keyword(s):  
Deep Learning ◽  
Learning Technology ◽  
Two Stage ◽  
Second Stage ◽  
Stage Classification ◽  
Different Types ◽  
Two Stages ◽  
Plant Seedlings

In agricultural production, weed removal is an important part of crop cultivation, but inevitably, other plants compete with crops for nutrients. Only by identifying and removing weeds can the quality of the harvest be guaranteed. Therefore, the distinction between weeds and crops is particularly important. Recently, deep learning technology has also been applied to the field of botany, and achieved good results. Convolutional neural networks are widely used in deep learning because of their excellent classification effects. The purpose of this article is to find a new method of plant seedling classification. This method includes two stages: image segmentation and image classification. The first stage is to use the improved U-Net to segment the dataset, and the second stage is to use six classification networks to classify the seedlings of the segmented dataset. The dataset used for the experiment contained 12 different types of plants, namely, 3 crops and 9 weeds. The model was evaluated by the multi-class statistical analysis of accuracy, recall, precision, and F1-score. The results show that the two-stage classification method combining the improved U-Net segmentation network and the classification network was more conducive to the classification of plant seedlings, and the classification accuracy reaches 97.7%.

Comparison of diffused layer prepared using liquid dopant solutions and pastes for solar cell with screen printed electrodes

2016 ◽  
Vol 33 (3) ◽  
pp. 167-171 ◽  
Author(s):  
Kazimierz Drabczyk ◽  
Edyta Wróbel ◽  
Grazyna Kulesza-Matlak ◽  
Wojciech Filipowski ◽  
Krzysztof Waczynski ◽  
...  
Keyword(s):  
Solar Cells ◽  
Ethyl Alcohol ◽  
Diffusion Processes ◽  
Phosphorus Oxychloride ◽  
Low Cost ◽  
Content Type ◽  
Base Solution ◽  
Different Types ◽  
Main Components ◽  
Two Stages

Purpose The purpose of this study is comparison of the diffusion processes performed using the commercial available dopant paste made by Filmtronics and the original prepared liquid dopant solution. To decrease prices of industrially produced silicon-based solar cells, the new low-cost production processes are necessary. The main components of most popular silicon solar cells are with diffused emitter layer, passivation, anti-reflective layers and metal electrodes. This type of cells is prepared usually using phosphorus oxychloride diffusion source and metal pastes for screen printing. The diffusion process in diffusion furnace with quartz tube is slow, complicated and requires expensive equipment. The alternative for this technology is very fast in-line processing using the belt furnaces as an equipment. This approach requires different dopant sources. Design/methodology/approach In this work, the diffusion processes were made for two different types of dopant sources. The first one was the commercial available dopant paste from Filmtronics and the second one was the original prepared liquid dopant solution. The investigation was focused on dopant sources fabrication and diffusion processes. The doping solution was made in two stages. In the first stage, a base solution (without dopants) was made: dropwise deionized (DI) water and ethyl alcohol were added to a solution consisting of tetraethoxysilane (TEOS) and 99.8 per cent ethyl alcohol. Next, to the base solution, orthophosphoric acid dissolved in ethyl alcohol was added. Findings Diffused emitter layers with sheet resistance around 60 Ω/sq were produced on solar grade monocrystalline silicon wafers using two types of dopant sources. Originality/value In this work, the diffusion processes were made for two different types of dopant sources. The first one was the commercial available dopant paste from Filmtronics and the second one was the original prepared liquid dopant solution.

scholarly journals CHARACTERISTICS OF FISH CRACKERS BASED ON TYPES OF FISH AND DIFFERENT TYPES OF STARCH

2018 ◽  
Vol 5 (2) ◽  
pp. 102
Author(s):  
Dede Zaenal Arif
Keyword(s):  
Economic Value ◽  
Free Variable ◽  
Physical Analysis ◽  
Second Stage ◽  
Sample Composition ◽  
Different Types ◽  
Development Levels ◽  
Tapioca Flour ◽  
Two Stages ◽  
Organoleptic Parameters

The purpose of this research is to produce fish crackers from different types of fish, namely catfish and patin fish as well as different types of starch and know the characteristics of a good fish crackers. The benefit that can be expected from this research was to utilize catfish and patin fish abundant potency and add economic value. The method of this research was divided into two stages, namely the first stage is the stage which determines the range of the comparison with the fish flour, determine the type of fish and determine the type of flour used by using the hedonik method of organoleptic parameters. On the second stage has a purpose and that is to analyze chemical and physical fish crackers by comparison. The data were analyzed using the method of experiment results simple linear variable (x) increase in comparison of fish and flour (part). The free variable (y) consists of the response of the color, flavor, aroma, texture, volume and the development levels of crispness. The type of fish and the type of starch correlated against all response organoleptic, except the catfish and tapioca flour was not correlated against sense, catfish and cornmeal were not correlated against the texture of the fish, and catfish and sago flour not correlated against scent. The highest correlation is indicated by the sample composition of the cornmeal and catfish fish total value index by 17 of the total value of the correlation coefficient in classification. The sample was selected based on organoleptic level consumer favorite is with the composition of samples catfish and tapioca flour with a 1:1 comparison (111). Based on the results of the chemical analysis of protein obtained 24,38%, fat content of 1.6%, levels of starch of 44.69% and water content of 5.5%. Physical analysis of the parameter and the mobilising of the volume development of IE of 146.43% and the level of crispness that is of 0.56 mm/s/50gram.  

scholarly journals O lúdico como contribuição para a aprendizagem

2016 ◽  
Vol 6 (1) ◽  
pp. 42
Author(s):  
Givoneide Barbosa de Sousa ◽  
José Ozildo dos Santos
Keyword(s):  
Teacher Education ◽  
Learning Process ◽  
Theoretical Study ◽  
Educational Environment ◽  
Different Types ◽  
The Subject

<p>Este artigo aborda como o lúdico, por meio da formação do educador, interfere no processo de aprendizagem. Trata-se de um estudo teórico a respeito das estratégias voltadas para o conceito histórico de criança, concepção sobre o cuidar, fundamentos sobre as instituições escolares. Nele também aborda-se as atividades, nas quais são observados conteúdos que envolvessem as brincadeiras lúdicas e que possibilitam as crianças aprendem com mais facilidade brincando. Demonstrou-se que a ludicidade ajuda no aprimoramento da educação, pode ser crítica e criativa. De acordo com a demanda e realidade da sala de aula, cabe ao educador desenvolve possibilidades que permitam aos educandos possam experimentar situações que interfiram de forma positiva no ensino, tornando-o produtivo. A utilização de jogos e brincadeiras no meio educacional propicia as crianças o aprimoramento de diversos conhecimentos de forma lúdica. Aos educadores, estes além de estarem motivados também com o lúdico, é preciso um conhecimento mais elaborado acerca do tema, para poder intervir nas brincadeiras das crianças. Contudo, faz-se necessário auxiliar a criança, de maneira sutil, para que brinque com diversos tipos de brinquedos.</p><p align="center"><strong><em>The playful</em></strong><strong><em> </em></strong><strong><em>as a contribution to</em></strong><strong><em> </em></strong><strong><em>learning</em></strong><strong><em></em></strong></p><p><strong>Abstract: </strong>This article discusses how the playful, through teacher education, interferes with the learning process. This is a theoretical study on the strategies for the historical concept of child conception of care, fundamentals of the schools. It also covers up the activities in which contents are observed involving the playful banter and enable children learn more easily playing. It was demonstrated that playfulness helps in the improvement of education, can be critical and creative. According to the demand and reality of the classroom, it is the educator develops possibilities that allow students to experience situations that interfere positively in the school, making it productive. The use of games and activities in the educational environment providing children the improvement of diverse knowledge in a playful manner. Educators, these besides being also motivated by the playful, we need a more elaborate knowledge on the subject, to be able to intervene in the games of children. However, it is necessary to help the child, subtly, to play with different types of toys.</p>

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