Gauß‘ Method for Measuring the Terrestrial Magnetic Force in Absolute Measure: Its Invention and Introduction in Geomagnetic Research

Centaurus ◽  
1984 ◽  
Vol 27 (2) ◽  
pp. 121-147 ◽  
Author(s):  
James G. O'Hara
Keyword(s):  
Magnetic Force ◽  
Absolute Measure ◽  
Gauss Method

scholarly journals A portable variometer for magnetic surveying

1916 ◽  
Vol 92 (639) ◽  
pp. 313-321
Keyword(s):  
Magnetic Force ◽  
Horizontal Component ◽  
Terrestrial Magnetism ◽  
Magnetic Forces ◽  
Gauss Method ◽  
Electrical Methods ◽  
First Time ◽  
Fundamental Physical

The method of measuring the horizontal component of the earth's magnetic force in absolute units devised by C. F. Gauss (Collected Works') will probably always be regarded as one of the most important contributions to the science of terrestrial magnetism. By its introduction magnetic forces were for the first time expressed in terms of the fundamental physical units. The principles of Gauss' method have continued in general use from 1836 up to the present time; but it seems likely that before long it will be superseded by simpler electrical methods.

Gauss and the Royal Society: The reception of his ideas on magnetism in Britain (1832—1842)

1983 ◽  
Vol 38 (1) ◽  
pp. 17-78 ◽  
Keyword(s):  
Royal Society ◽  
Magnetic Force ◽  
Antarctic Expedition ◽  
Absolute Measure ◽  
History Of Geophysics ◽  
History Of ◽  
Further Development ◽  
Magnetic Observatories ◽  
Mathematics And Physics ◽  
Foreign Member

Karl Friedrich Gauss (1977—1855) was a Foreign Member of the Royal Society (from 1804) and a recipient of the Society’s Copley Medal in 1838. His magnanimous disposition to mathematics and physics in Britain is exemplified in his contacts and regular correspondence with Fellows of the Royal Society involved in terrestrial magnetic research. Gauss’s own paper on the intensity of the terrestrial magnetic force in absolute measure (1832) was of fundamental importance in the history of geophysics. Extensive correspondence with George Biddell Airy, J. F. W. Herschel, Edward Sabine and Humphrey Lloyd led to close collaboration and the adoption of his ideas on magnetism in Britain after 1835, which had important consequences especially for the further development of geomagnetic instruments. The magnetic observatories established in the British Isles and in the colonies (1839) and the British Antarctic Expedition (1839—1843) were equipped with instruments operating on Gaussian principles. In this paper the reception of Gauss’s ideas on magnetism in Britain in the years from 1832 to 1842 is examined and selections from his and other unpublished letters to British contemporaries are presented.

scholarly journals XII. Determination of verdet’s constant in absolute units

1877 ◽  
Vol 25 (171-178) ◽  
pp. 144-147
Keyword(s):  
Magnetic Force ◽  
Polarized Light ◽  
Absolute Measure ◽  
The Subject

In the year 1845 Faraday discovered that if plane polarized light passes through certain media, and these media be acted on by a sufficiently powerful magnetic force, the plane of polarization is rotated. About the year 1853 M. Verdet commenced a long and exhaustive examination of the subject, and his first result (published ‘Ann. de Chimie et de Phys.’ 3 série, tom. xli.) was that, for any given magnet and medium, “the ratio between the strength of the magnet and the amount of rotation is constant”. The object of the present research is to determine this constant in absolute measure—that is, in the C. G. S. system.

Influence of unbalanced magnetic force on shaft deflection in permanent magnet synchronous motor with fractional slot concentrated windings

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1461-1468
Author(s):  
Ting Dong ◽  
Juyan Huang ◽  
Bing Peng ◽  
Ling Jian
Keyword(s):  
Permanent Magnet ◽  
Magnetic Force ◽  
Permanent Magnet Synchronous Motor ◽  
Operational Reliability ◽  
Topology Structure ◽  
Permanent Magnet Synchronous Motors ◽  
Synchronous Motors ◽  
Shaft Deflection ◽  
Large Length ◽  
Fractional Slot

The calculation accuracy of unbalanced magnetic forces (UMF) is very important to the design of rotor length, because it will effect the shaft deflection. But in some permanent magnet synchronous motors (PMSMs) with fractional slot concentrated windings (FSCW), the UMF caused by asymmetrical stator topology structure is not considered in the existing deflection calculation, which is very fatal for the operational reliability, especially for the PMSMs with the large length-diameter ratio, such as submersible PMSMs. Therefore, the part of UMF in the asymmetrical stator topology structure PMSMs caused by the choice of pole-slot combinations is analysized in this paper, and a more accurate rotor deflection calculation method is also proposed.

Principle and Basic Characteristics of Variable-Magnetic-Force Memory Motors

2011 ◽  
Vol 131 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Kazuto Sakai ◽  
Kazuaki Yuki ◽  
Yutaka Hashiba ◽  
Norio Takahashi ◽  
Kazuya Yasui ◽  
...  
Keyword(s):  
Magnetic Force ◽  
Basic Characteristics

Are males in a relationship flirted with more? Testing for mate choice copying in humans

2016 ◽  
Author(s):  
Niels van de Ven ◽  
Monique Maria Henriettte Pollmann ◽  
Rob Nelissen ◽  
Nadiya Sayenko
Keyword(s):  
Mate Choice ◽  
Scientific Evidence ◽  
Mate Choice Copying ◽  
Two Samples ◽  
Absolute Measure ◽  
Cast Doubt

Ample anecdotal and some scientific evidence suggests that men who enter a relationship feel that they are flirted with more frequently than before they had a partner. This phenomenon has been interpreted as a form of mate choice copying; the idea that females prefer males that are in a relationship with another female. In two samples (N = 271 and N = 396) we replicate that people indicate that flirting increased after entering a relationship. However, on a more absolute measure (how often people feel they are flirted with), we did not find that those in a relationship felt to be flirted with more than those without one. Our findings cast doubt on the interpretation that ours (and similar) findings are support for mate choice copying, and we argue that alternative explanations should be considered.

Study of MFM Application in Semiconductor Failure Analysis

2004 ◽  
Author(s):  
Way-Jam Chen ◽  
Lily Shiau ◽  
Ming-Ching Huang ◽  
Chia-Hsing Chao
Keyword(s):  
Magnetic Field ◽  
Failure Analysis ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Current Flow ◽  
Force Microscopy ◽  
The Magnetic Field ◽  
A Current

Abstract In this study we have investigated the magnetic field associated with a current flowing in a circuit using Magnetic Force Microscopy (MFM). The technique is able to identify the magnetic field associated with a current flow and has potential for failure analysis.

Sign in / Sign up

Export Citation Format

Share Document