ZIB

Treffer pro Seite

Treffer 1 - 2 | 2 Treffer

Sortierung

Digitale Medien

Sampling procedure for measuring Hall coefficients using the van der Pauw method (1989)

Ndlela, Zolili ; Bates, Clayton W.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 60 (1989), S. 3482-3484

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: It is shown that care must be exercised in using digital equipment when making Hall measurements in a van der Pauw setup employing the ASTM standard method. This arises because of quantization error when working near the sensitivity limit of the equipment. For materials with small Hall mobilities (〈100 cm2/V s) this can lead to an incorrect specification of the carrier type and inconsistent mobility behavior. A simple averaging and sampling procedure is suggested to suppress this type of behavior and is found to be sufficient to obtain reliable and repeatable Hall voltages and coefficients.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1140497

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Insect sting anaphylaxis in patients without detectable serum venom-specific IgE (1985)

CLAYTON, W. F. ; GEORGITIS, J. W. ; REISMAN, R. E.

Oxford, UK : Blackwell Publishing Ltd

Clinical & experimental allergy 15 (1985), S. 0

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1365-2222

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Medizin

Notizen: Following insect sting anaphylaxis, twenty-five patients of over 500 evaluated, did not have detectable serum venom-specific IgE. Twenty-two were evaluated within 1 year of the reaction, fifteen within 6 months. Anaphylaxis occurred in six patients after their first sting exposure. The clinical features of the sting reaction were typical of the reaction occurring in insect-allergic patients with serum venom-specific IgE. Eleven of the twenty-five patients had negative venom skin tests. These observations suggest that a non-IgE mechanism may be responsible for a minority of insect sting reactions.