Anomalous induction across Europe

1995 ◽  
Vol 39 (3) ◽  
pp. 286-288 ◽  
Author(s):  
Oldřich Praus ◽  
Jana Pěčová
Keyword(s):  
Anomalous Induction

Anomalous induction in the Carpathians

1977 ◽  
Vol 21 (1) ◽  
pp. 35-57 ◽  
Author(s):  
Jerzy Jankowski ◽  
Antoni Szymański ◽  
Karel Pěč ◽  
Václav Červ ◽  
Václav Petr ◽  
...  
Keyword(s):  
The Carpathians ◽  
Anomalous Induction

scholarly journals Anomalous Induction of Mycobacteriophages Mediated by Mitomycin C

1969 ◽  
Vol 4 (4) ◽  
pp. 542-544 ◽  
Author(s):  
Manuel Rieber ◽  
Tamotsu Imaeda
Keyword(s):  
Mitomycin C ◽  
Anomalous Induction

scholarly journals Anomalous Induction of Brightness and Surface Qualities: A New Illusion Due to Radial Lines and Chromatic Rings

Perception ◽  
10.1068/p3475 ◽  
2003 ◽  
Vol 32 (11) ◽  
pp. 1289-1305 ◽  
Author(s):  
Baingio Pinna ◽  
Lothar Spillmann ◽  
John S Werner
Keyword(s):  
Surface Properties ◽  
Surface Quality ◽  
Black Ring ◽  
Light Blue ◽  
Brightness Enhancement ◽  
White Disk ◽  
Induction Process ◽  
Length Width ◽  
Anomalous Induction ◽  
Surface Induction

When a chromatic (eg light-blue) annulus surrounds the central gap of an Ehrenstein figure so as to connect the inner ends of the radial lines, a striking new lightness effect emerges: the central white disk has both a self-luminous quality (brighter than in the regular Ehrenstein figure) and a surface quality (dense, paste-like). Self-luminous and surface qualities do not ordinarily appear co-extensively: hence, the brightness induction is called anomalous. In experiment 1, subjects separately scaled self-luminous and surface properties, and in experiment 2, brightness was nulled by physically darkening the central gap. Experiments 3 and 4 were designed to evaluate the importance of chromatic versus achromatic properties of the annulus; other aspects of the annulus (width or the inclusion of a thin black ring inside or outside the chromatic annulus) were tested in experiments 5–7. In experiments 8–12, subjects rated the brightness of modified Ehrenstein figures varying the radial lines (number, length, width, contrast, arrangement). Variation of these parameters generally affected brightness enhancement in the Ehrenstein figure and anomalous brightness induction in a similar manner, but was stronger for the latter effect. On the basis of these results, anomalous brightness induction is attributed to a surface induction process triggered by an interaction between illusory brightness enhancement (due to the radial lines) and border ownership (due to the blue annulus).

scholarly journals Appraisal of electromagnetic induction effects on magnetic pulsation studies

2001 ◽  
Vol 19 (2) ◽  
pp. 171-178 ◽  
Author(s):  
B. R. Arora ◽  
P. B. V. Subba Rao ◽  
N. B. Trivedi ◽  
A. L. Padilha ◽  
I. Vitorello
Keyword(s):  
Equatorial Electrojet ◽  
Phase Changes ◽  
Ulf Waves ◽  
Pulsation Period ◽  
Wave Polarization ◽  
Study Region ◽  
Magnetic Pulsation ◽  
Source Field ◽  
Induced Currents ◽  
Anomalous Induction

Abstract. The quantification of wave polarization characteristics of ULF waves from the geomagnetic field variations is done under ‘a priori’ assumption that fields of internal induced currents are in-phase with the external inducing fields. Such approximation is invalidated in the regions marked by large lateral conductivity variations that perturb the flow pattern of induced currents. The amplitude and phase changes that these perturbations produce, in the resultant fields at the Earth’s surface, make determination of polarization and phase of the oscillating external signals problematic. In this paper, with the help of a classical Pc5 magnetic pulsation event of 24 March 1991, recorded by dense network of magnetometers in the equatorial belt of Brazil, we document the nature and extent of the possible influence of anomalous induction effects in the wave polarization of ULF waves. The presence of anomalous induction effects at selected sites lead to an over estimation of the equatorial enhancement at pulsation period and also suggest changes in the azimuth of ULF waves as they propagate through the equatorial electrojet. Through numerical calculations, it is shown that anomalous horizontal fields, that result from induction in the lateral conductivity distribution in the study region, vary in magnitude and phase with the polarization of external source field. Essentially, the induction response is also a function of the period of external inducing source field. It is further shown that when anomalous induction fields corresponding to the magnitude and polarization of the 24 March 1991 pulsation event are eliminated from observed fields, corrected amplitude in the X and Y horizontal components allows for true characterisation of ULF wave parameters.Key words. Geomagnetism and paleomagnetism (geomagnetic induction) – Ionosphere (equatorial ionosphere) – Magnetospheric physics (magnetosphere-ionosphere interactions)

Anomalous induction zone near the eastern margin of the Bohemian Massif

1987 ◽  
Vol 45 (2) ◽  
pp. 161-169 ◽  
Author(s):  
V. Petr ◽  
J. Pěčová ◽  
O. Praus ◽  
K. Pěč
Keyword(s):  
Bohemian Massif ◽  
Eastern Margin ◽  
Induction Zone ◽  
Anomalous Induction
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