scholarly journals Rapid computation of electromagnetic fields for high-frequency sounding in the 300 kHz to 30 MHz range over layered media

1994 ◽  
Author(s):  
W.L. Anderson
Keyword(s):  
Electromagnetic Fields ◽  
High Frequency ◽  
Layered Media

To: “Q‐factor approximation of electromagnetic fields for high‐frequency sounding in the 300 kHz to 30 kHz range over layered media,” by Walter L. Anderson (July–August 1995, GEOPHYSICS, 60, p. 1253–1258).

Geophysics ◽  
1995 ◽  
Vol 60 (6) ◽  
pp. 1949-1949
Keyword(s):  
Electromagnetic Fields ◽  
High Frequency ◽  
Layered Media ◽  
Q Factor

The last bracketed term [Formula: see text] in equation (1) should appear in the denominator; i.e., a “/” symbol should be inserted immediately before this term in equation (1), exactly as before the last bracketed term in equation (3). The title letters “b)” and “c)” in the sub‐figures of Figure 4 should be interchanged, which would then correspond to the existing caption of Figure 4 and the text in the last paragraph on page 1255.

Q‐factor approximation of electromagnetic fields for high‐frequency sounding in the 300 kHz to 30 MHz range over layered media

Geophysics ◽  
1995 ◽  
Vol 60 (4) ◽  
pp. 1253-1258 ◽  
Author(s):  
Walter L. Anderson
Keyword(s):  
Closed Form ◽  
Half Space ◽  
Electromagnetic Fields ◽  
High Frequency ◽  
Analytic Solution ◽  
Layered Media ◽  
New Method ◽  
Earth Model ◽  
Q Factor ◽  
Layered Earth

A new method for rapid approximation of electromagnetic (EM) fields for high‐frequency sounding (HFS) over a layered earth is presented in this paper. The essence of this method uses a Q‐factor correction for extending a closed‐form, half‐space analytic solution to a layered earth model. Use of the Q‐factor in this context was first studied by Wait (1953, 1962). Kraichman (1976) also discusses the problem of when the Q‐factor method can be used to provide a good approximation to an exact layered earth solution.

Method of high frequency therapy at cows' mastitis during machine milking

2020 ◽  
pp. 9-12
Author(s):  
Viktor E. Lyubimov ◽  
Keyword(s):  
Dairy Cows ◽  
Electromagnetic Fields ◽  
High Frequency ◽  
High Efficiency ◽  
Environmentally Friendly ◽  
Ultrahigh Frequency ◽  
Machine Milking ◽  
High Frequency Electromagnetic Field ◽  
Milking Machine ◽  
Methods Of Treatment

Health of dairy cows ensures human health, so it is important that dairy products do not contain antibiotics that are used to treat any inflammation, including mastitis. In Russia at present, the problem of mastitis in cows exists with both attached and loose housing of cows. Mastitis of dairy cows are the great problem in milking husbandry. Losses from mastitis in milk yield can reach 15-20%. The main reasons for the occurrence of nonspecific mastitis of cows are the shortcomings of the working components of the milking machine: the degree of deterioration of the nipple rubber and the violation of machine milking technology (the reduction in pre-milking time and vacuum fluctuations account for 70% of all causes). Treatment of mastitis with antibiotics is effective, but not environmentally friendly and unacceptable. For the treatment of inflammation of the udder, it is necessary to use more environmentally friendly methods of treatment, one of which is the exposure to ultra-high frequency electromagnetic field tested by medicine. Use of three types of medical-mobile milking machines with the same method of exposure to ultrahigh-frequency electromagnetic fields on cow's nipples through electrodes in milking cups: LPDA-1-UHF, LPDA-2-UHF and LPDA-UHF-30 M, is described in the article. Author proved that cows with subclinical forms of mastitis recovered faster during milking with exposure to the ultrahigh frequency than when treated by antibiotics, and milking with the ultrahigh frequency device helps to recover 82% of the affected quarters with clinical forms and 100% of cows with subclinical forms of mastitis or with udder irritation. The high efficiency of the method of exposure to electromagnetic fields of the ultrahigh frequency during machine milking by means of medical-mobile milking machines LPDA-UHF for the prevention and treatment of mastitis of cows was shown.

scholarly journals Translocation of silica nanospheres through giant unilamellar vesicles (GUVs) induced by a high frequency electromagnetic field

RSC Advances ◽  
2021 ◽  
Vol 11 (50) ◽  
pp. 31408-31420
Author(s):  
Palalle G. Tharushi Perera ◽  
Nevena Todorova ◽  
Zoltan Vilagosh ◽  
Olha Bazaka ◽  
The Hong Phong Nguyen ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Membrane Permeability ◽  
Electromagnetic Fields ◽  
High Frequency ◽  
Model Systems ◽  
Membrane Model ◽  
Silica Nanospheres ◽  
Giant Unilamellar Vesicles ◽  
High Frequency Electromagnetic Field ◽  
First Time

Membrane model systems capable of mimicking live cell membranes were used for the first time in studying the effects arising from electromagnetic fields (EMFs) of 18 GHz where membrane permeability was observed following exposure.

scholarly journals Influence of High Frequency Electromagnetic Fields Produced by Antennas for Mobile Communication on the Structure of the Pancreas in Rats: Histological and Unbiased Stereological Analysis

2018 ◽  
Vol 68 (4) ◽  
pp. 484-501
Author(s):  
D.Smiljana Paraš ◽  
B. Radoslav Gajanin ◽  
Lj. Maja Manojlović ◽  
Nj. Zoran Ružić
Keyword(s):  
Electromagnetic Fields ◽  
Mobile Communication ◽  
Mobile Communications ◽  
High Frequency ◽  
Volume Density ◽  
Pancreatic Tissue ◽  
Male Rats ◽  
Numerical Density ◽  
Unexposed Group ◽  
Study Results

Abstract The emission of high frequency electromagnetic fields (HF EMF) produced by antennas for mobile communications has been controversially alleged to have adverse health effects. The aim of our work was to examine whether there are effects on living organisms from HF EMF produced by mobile communication antennas. In this experiment Wistar strain rats were exposed to HF EMF with the following characteristics: 1.9 GHz frequency, 0.24 A/m intensity, electric field strength of 4.79 V/m, and SAR (specific absorption rate) value of 2.0 W/m2. Exposure time was 7 hours per day, 5 days per week, over the course of sixty days. This experiment was conducted on a total of 30 male rats divided randomly into two equal groups: one group of animals was exposed to GSM fields (Global System of antennas for Mobile Communications) as described above whereas the other group of animals was not exposed to any GSM fields. In our study, results show that the quantity, diameter and numerical density of the islets of Langerhans in the pancreatic tissue increased in rats exposed to HF EMF compared to the unexposed group. The volume density, number and numerical density of pancreatic cells also changed in rats that were exposed to the HF EMF compared to the unexposed group. Our study shows a change in the stereological and histological parameters of rat pancreatic tissue due to the effects of HF EM fields produced by antennas for mobile communication.

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