Induction of complete A V block in dogs by transcatheter ablation using high-frequency current: An alternative to direct-current high energy shock

1989 ◽  
Vol 10 (2) ◽  
pp. 113-119 ◽  
Author(s):  
V. LOPEZ-MERINO ◽  
F. J. CHORRO ◽  
J. SANCHIS ◽  
R. GARCIA-CIVERA ◽  
L. SUCH ◽  
...  
Keyword(s):  
Direct Current ◽  
High Frequency ◽  
High Energy ◽  
High Frequency Current ◽  
Frequency Current

Perspective of High Energy Heating Implementation for Steel Surface Saturation with Carbon

2014 ◽  
Vol 698 ◽  
pp. 351-354 ◽  
Author(s):  
Natalya V. Plotnikova ◽  
Anna Losinskaya ◽  
Vadim Yu. Skeeba ◽  
Ekaterina Nikitenko
Keyword(s):  
Electron Beam ◽  
High Frequency ◽  
Surface Hardness ◽  
High Energy ◽  
Current Treatment ◽  
Surface Layers ◽  
High Frequency Current ◽  
Electron Beam Deposition ◽  
Frequency Current ◽  
Beam Deposition

The possibility of obtaining of surface layers on low-carbon steel 20 by high-energy methods is shown. The features of structure formation in the surface layers after atmospheric electron-beam deposition of iron-graphite powder mixture and high-frequency current treatment are considered. It is shown that coatings with thickness of 2.6 mm and hardness of up to 8000 MPa are formed during atmospheric electron beam deposition. High-frequency current treatment allows to obtain coatings with thickness from 500 to 1600 μm, which hardness reaches 7000 MPa. Hardness increased is due to the formation of hypoeutectic cast iron structure or hypereutectoid steel during high-energy treatment, depending on the processing modes. It is expected that the increase in surface hardness will positively affect the wear resistance of high-carbon coatings.

THE EFFECT OF HIGH-FREQUENCY CURRENTS ON THE TRANSITION POINT OF SUPERCONDUCTORS

1933 ◽  
Vol 9 (6) ◽  
pp. 630-636 ◽  
Author(s):  
E. F. Burton ◽  
J. O. Wilhelm ◽  
A. Pitt ◽  
A. C. Young
Keyword(s):  
Thin Films ◽  
Direct Current ◽  
High Frequency ◽  
Transition Point ◽  
Appreciable Effect ◽  
Appreciable Change ◽  
High Frequency Current ◽  
Current Point ◽  
Frequency Current

The present paper represents a continuation of the work on superconducting phenomena for high-frequency currents and the interaction of high-frequency and direct currents. It is found for thin films of tin that there is no appreciable change in the transition point for frequencies from zero up to 3 × 107 cycles per sec. There is no effect on the high-frequency point due to direct currents or on the direct current point due to high-frequency currents, when the value of these currents is below about 20 milliamps. There is a very appreciable effect on the direct current point when high-frequency currents up to 200 milliamps. are superimposed on the direct current. This effect varies with the strength of the high-frequency current, and not, as thought before, with the ratio of the high-frequency to the direct current.

scholarly journals Fracture of a gas pipeline manufactured by high frequency current welding

2021 ◽  
Vol 1023 ◽  
pp. 012003
Author(s):  
A A Alexeev ◽  
A S Syromyatnikova ◽  
A M Bolshakov ◽  
A R Ivanov
Keyword(s):  
High Frequency ◽  
Gas Pipeline ◽  
High Frequency Current ◽  
Frequency Current
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