Containerless melting and solidification of materials with an aerodynamic levitation system

1982 ◽  
Vol 53 (6) ◽  
pp. 851-853 ◽  
Author(s):  
W. A. Oran ◽  
L. H. Berge
Keyword(s):  
Levitation System ◽  
Aerodynamic Levitation ◽  
Melting And Solidification

An aerodynamic levitation system for drop tube and quenching experiments

2003 ◽  
Vol 74 (2) ◽  
pp. 1057-1063 ◽  
Author(s):  
Yasutomo Arai ◽  
Paul-François Paradis ◽  
Tomotsugu Aoyama ◽  
Takehiko Ishikawa ◽  
Shinichi Yoda
Keyword(s):  
Drop Tube ◽  
Levitation System ◽  
Aerodynamic Levitation

F116 Structural analysis of liquid Bi-Ga alloy by using X-ray scattering with aerodynamic levitation system

2014 ◽  
Vol 2014 (0) ◽  
pp. _F116-1_-_F116-2_
Author(s):  
Kota KITAMURA ◽  
Tadahiko MASAKI ◽  
Takehiko ISHIKAWA ◽  
Akitoshi MIZUNO ◽  
Shinji KOHARA
Keyword(s):  
Structural Analysis ◽  
X Ray ◽  
X Ray Scattering ◽  
Levitation System ◽  
Aerodynamic Levitation ◽  
Ray Scattering

Les représentations des enfants de 5-6 ans sur la fusion et la solidification du sel, comme support pour le déploiement des activités didactiques

2015 ◽  
Vol 6 (3) ◽  
pp. 943-947 ◽  
Author(s):  
Konstantinos Ravanis
Keyword(s):  
Young Children ◽  
Empirical Research ◽  
School Children ◽  
Physical World ◽  
Scientific Model ◽  
Open Type ◽  
Different Types ◽  
Individual Conversations ◽  
Melting And Solidification

The representation of the properties and phenomena of the physical world exists from the beginning of life, as a first datum of reality. In several studies focused on children's representations we find that these representations these representations are critical to education and are often incompatible with the scientific model. This article presents the results of an empirical research on the representations of young children for melting and solidification of salt. The research sample consisted of 79 pre-school children (five to six years old) from one state kindergarten in Greece. Data were collected through expanded, open type, semi-structured individual conversations between a child of the sample and one researcher. The results of the interviews show that these children use different types of representations, the majority dominated by the nature of the substance under study.

scholarly journals Movement Control Method of Magnetic Levitation System Using Eccentricity of Non-Contact Position Sensor

2021 ◽  
Vol 11 (5) ◽  
pp. 2396
Author(s):  
Jong Suk Lim ◽  
Hyung-Woo Lee
Keyword(s):  
Motor System ◽  
Control Method ◽  
Magnetic Levitation ◽  
Movement Control ◽  
Position Sensor ◽  
Semiconductor Wafer ◽  
Control Command ◽  
Levitation System ◽  
Magnetic Levitation System ◽  
Contact Position

This paper presents a method of utilizing a non-contact position sensor for the tilting and movement control of a rotor in a rotary magnetic levitation motor system. This system has been studied with the aim of having a relatively simple and highly clean alternative application compared to the spin coater used in the photoresist coating process in the semiconductor wafer process. To eliminate system wear and dust problems, a shaft-and-bearing-free magnetic levitation motor system was designed and a minimal non-contact position sensor was placed. An algorithm capable of preventing derailment and precise movement control by applying only control without additional mechanical devices to this magnetic levitation system was proposed. The proposed algorithm was verified through simulations and experiments, and the validity of the algorithm was verified by deriving a precision control result suitable for the movement control command in units of 0.1 mm at 50 rpm rotation drive.

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