High Frequency Permeability of Ferromagnetic Materials

Millership, R; Webster, Francis

doi:10.1088/0370-1301/63/10/306

Cited by 10 publications

(10 citation statements)

References 17 publications

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“…Alkaline peptone water (pH 84-8.6) has been recommended as an enrichment broth for enhancing recovery of Aeromonas species from environmental as well as clinical samples (von Graevenitz 8c Bucher 1983; Millership & Chattopadhyay 1984;Robinson et al 1986). Starch ampicillin agar has been recommended as a useful medium for rapid quantitative recovery of these organisms from foods (Palumbo et al 1985;Callister & Agger 1987;Okrend et al 1987).…”

Section: Discussionmentioning

confidence: 99%

Enterotoxigenic aeromonads on retail lamb meat and offal

Majeed

Egan

Rae

1989

Journal of Applied Bacteriology

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Enrichment in alkaline peptone water was compared with the direct plating method for the isolation of Aeromonas spp. from lamb meat and offal samples. The enrichment method significantly increased the isolation rate of aeromonads. Motile Aeromonas species (A. hydrophila, A. sobria and A. caviae) were present in all kinds of samples investigated. Seventy-three Aeromonas strains isolated in this survey were characterized to species level and examined for their ability to produce virulence factors. Strains identified as A. sobria were the strongest producers of haemolysin and enterotoxin, whereas A. caviae strains were consistently non-haemolytic and non-enterotoxigenic. Thus it is likely that lamb meat and offal are potentially significant sources of virulent Aeromonas species and may play an important role in the aetiology of Aeromonas-associated gastro-enteritis.

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Section: Discussionmentioning

confidence: 99%

Enterotoxigenic aeromonads on retail lamb meat and offal

Majeed

Egan

Rae

1989

Journal of Applied Bacteriology

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“…Two values of relative permeability were therefore estimated, referred to as µ R and µ L . The existence of two different coefficients was later proven to be consistent with the idea of a complex permeability, with µ R quantifying magnetic [18] and interpolated with cubic functions.…”

Section: B Magnetic Permeabilitymentioning

confidence: 60%

Power Dissipation in Reverberation Chamber Metallic Surfaces Based on Ferrous Materials

Cozza

Monsef

2019

IEEE Trans. Electromagn. Compat.

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Models predicting the composite quality factor (QF) of a reverberation chamber (RC) consider, among several potential contributors, dissipation in its metallic boundaries. The related partial quality factor, Qw, is of fundamental importance, as it controls the asymptotic high-frequency behavior of an RC and, ultimately, its ability to generate high-intensity fields. Yet, the current model has been known to overestimate in certain cases the composite QF by up to several dB. This paper provides insight into the causes of these disagreements by introducing generalized models of dissipation in ferrous materials found in RCs, by first acknowledging that their magnetic permeabilities are complex quantities, which is shown to theoretically boost dissipation well beyond the GHz range. A more general dissipation model is presented, taking into account the layered nature of steel plates. Among its predictions, confirmed by experiments, are extra losses from steel surfaces in the lower frequency range and the linear increase in Qw over the GHz range, as opposed to a squareroot dependence expected for homogeneous bulk metals. Metallic coating layers, originally introduced to protect steel plates, have therefore a more fundamental role to play, controlling dissipation levels by reducing interactions with ferrous materials and should therefore be designed accordingly.

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Section: Meßergebnisseunclassified

“…(A 19) berechnete Wert 1/ 2~ 1,8-10 10 s' 1 stimmt nahezu mit dem unter AIII3 angegebenen Wert (= 1/ ) * 2,5 · 10 s" 1 überein, der aus der Analyse des Frequenzganges der Anfangspermeabilität gewonnen wurde [70]. Es findet sich also wieder eine denkbar [125] gute Übereinstimmung der nach der Theorie der ferromagnetischen Resonanz berechneten, mit dem aus der Analyse des Frequenzganges der Anfangspermeabilität gewonnenen Werte (wo^l^-lO^s' 1 [70] [70] ermittelten Wert zugrunde legen. Mit //ro D~1 5 [125] ergibt sich nach Gl.…”

Section: Meßergebnisseunclassified

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Über die Messung der magnetischen Permeabilität von Metallen mittels Hohlraumresonator und die Permeabilität von Eisen im Gebiet der ferromagnetischen Resonanz

Reich¹

1956

Frequenz

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High Frequency Permeability of Ferromagnetic Materials

Cited by 10 publications

References 17 publications

Enterotoxigenic aeromonads on retail lamb meat and offal

Enterotoxigenic aeromonads on retail lamb meat and offal

Power Dissipation in Reverberation Chamber Metallic Surfaces Based on Ferrous Materials

Über die Messung der magnetischen Permeabilität von Metallen mittels Hohlraumresonator und die Permeabilität von Eisen im Gebiet der ferromagnetischen Resonanz

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