Transient Characteristics and Frequency Analysis of Impulsive Electromagnetic Radiation caused by Low Voltage ESD in Spherical Electrode

2015 ◽  
Vol 135 (5) ◽  
pp. 265-270 ◽  
Author(s):  
Ken Kawamata ◽  
Yoshinori Taka ◽  
Shigeki Minegishi ◽  
Osamu Fujiwara
Keyword(s):  
Electromagnetic Radiation ◽  
Frequency Analysis ◽  
Low Voltage ◽  
Transient Characteristics ◽  
Spherical Electrode

The Quantitative Forecast and Suppression on the Electromagnetic Radiation from Low Voltage Frequency Converter

2014 ◽  
Vol 575 ◽  
pp. 696-703
Author(s):  
Cheng Hai Gao ◽  
Jian Ru Wan ◽  
Jiang Li
Keyword(s):  
Electromagnetic Radiation ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Frequency Converter ◽  
International Standards ◽  
Value Change ◽  
Radiation Characteristics ◽  
Radiation Theory ◽  
Voltage Frequency ◽  
The Impact

The main electromagnetic radiation source and the generating mechanism in low voltage frequency converter were defined and analyzed in this paper according to electromagnetic radiation theory together with the discussion of the impact on radiation from raise time, falling time of pulse width modulation (PWM) signal and carrier frequency, so that the radiation can be understood more exactly in term of numerical value change, which helps specifically reduction of converter radiation during design phase in compliance with related international standards and technical norms regarding industrial converter. Started with the theory of electromagnetic field the zone around converter were differentiated and analyzed based on the radiation characteristics. As main means of radiation suppression in converter shielding and grounding were quantitatively analyzed. A series of tests with different power rating converters verified the calculation and analysis. Consequently the design of converter was guided to meet the requirements of standard.

Processing of human melanoma cells for correlative TEM, LVSEM, and LM

1991 ◽  
Vol 49 ◽  
pp. 106-107
Author(s):  
Marek Malecki ◽  
J. Victor Small ◽  
James Pawley
Keyword(s):  
Electron Microscopy ◽  
Low Voltage ◽  
Fluorescent Microscopy ◽  
Blood Stream ◽  
Surface Topology ◽  
Integrin Receptors ◽  
Transmission Electron ◽  
Develop Technology ◽  
Voltage Scanning ◽  
Mechanisms Of Adhesion

The relative roles of adhesion and locomotion in malignancy have yet to be clearly established. In a tumor, subpopulations of cells may be recognized according to their capacity to invade neighbouring tissue,or to enter the blood stream and metastasize. The mechanisms of adhesion and locomotion are themselves tightly linked to the cytoskeletal apparatus and cell surface topology, including expression of integrin receptors. In our studies on melanomas with Fluorescent Microscopy (FM) and Cell Sorter(FACS), we noticed that cells in cultures derived from metastases had more numerous actin bundles, then cells from primary foci. Following this track, we attempted to develop technology allowing to compare ultrastructure of these cells using correlative Transmission Electron Microscopy(TEM) and Low Voltage Scanning Electron Microscopy(LVSEM).

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