REPLY OF MESSRS I. D’ERCEVILLE AND G. KUNETZ TO THE DISCUSSION BY J. T. WEAVER

Geophysics ◽  
1963 ◽  
Vol 28 (3) ◽  
pp. 490-490
Author(s):  
I. d’Erceville ◽  
G. Kunetz
Keyword(s):  
Primary Field ◽  
Displacement Currents ◽  
Telluric Currents

The authors have read Mr. Weaver’s remarks with great interest. They would like to point out that their aim has not been to clear up the still debated question of how to define the primary field that generates the telluric currents, but to study the effect of a fault on a special type of field, complying with the laws of electromagnetism (neglecting the displacement currents, as is usual at the frequences considered) and differing little from actual telluric currents.

On: “Effect of temporal and spatial variations of the primary signal on VLF total‐field surveys” by M. A. Vallee, M. Chouteau, and G. J. Palacky (January 1992 GEOPHYSICS, p. 97‐105)

Geophysics ◽  
1993 ◽  
Vol 58 (5) ◽  
pp. 756-756 ◽  
Author(s):  
Jean Roy
Keyword(s):  
Numerical Modeling ◽  
Field Amplitude ◽  
Primary Field ◽  
Dense Network ◽  
Total Field ◽  
Field Surveys ◽  
Attitude Stability ◽  
Amplitude Data ◽  
Primary Signal ◽  
Temporal And Spatial

Vallee et al. (1992) remark on the sensitivity of airborne ratio measuring VLF instruments to platform attitude stability. The authors also remind the users of VLF total field amplitude data, as produced by instruments such as the Herz TOTEM, of two problems associated with this type of data: spatial and temporal fluctuations of the VLF primary field. They recommend the use of a dense network of VLF monitoring stations and numerical modeling of field propagation to cope with these problems. These two recommendations are briefly discussed here and one alternative recommendation is made.

FUSION RULES FOR THE FRACTIONAL LEVEL $\widehat{{\rm sl}(2)}$ ALGEBRA

1992 ◽  
Vol 07 (13) ◽  
pp. 1185-1195 ◽  
Author(s):  
HIDETOSHI AWATA ◽  
YASUHIKO YAMADA
Keyword(s):  
Null Vector ◽  
Primary Field ◽  
Fusion Rules ◽  
Weyl Transformation ◽  
Interesting Structure

We derive, as the condition for the null vector decoupling, the fusion rules for the [Formula: see text] algebra with fractional level, which have an interesting structure related to affine Weyl transformation. It is shown that, to get non-trivial fusion rules, we must include the primary field which belongs to neither the highest nor the lowest weight representations.

Pump and displacement currents of reconstituted ATP synthase on black lipid membranes

1988 ◽  
Vol 104 (2) ◽  
pp. 179-191 ◽  
Author(s):  
B. Christensen ◽  
M. Gutweiler ◽  
E. Grell ◽  
N. Wagner ◽  
R. Pabst ◽  
...  
Keyword(s):  
Atp Synthase ◽  
Lipid Membranes ◽  
Black Lipid Membranes ◽  
Displacement Currents

Independent Environmental Regulation in India: Less an Authority and more a Process from Below

2018 ◽  
Vol 64 (4) ◽  
pp. 614-626
Author(s):  
Tishyarakshit Chatterjee
Keyword(s):  
Decision Making ◽  
Environmental Regulation ◽  
Regulatory Authority ◽  
Environmental Regulations ◽  
Political Support ◽  
Environmental Data ◽  
Primary Field ◽  
Environmental Laws ◽  
Field Level ◽  
Set Up

With India’s well-intentioned environmental laws and legal interpretations in place, there is still a perceptible weakness in the enforcement of her environmental regulations. This is ascribed to the centralised departmental structure and process of implementation, which prioritise clearances of developmental projects over monitoring and cleaning up of already polluted environments. Although in a democratic set-up, a lack of transparency and participation of knowledgeable stakeholders in decision-making are other process weaknesses noticed. Establishing an Independent Environmental Regulatory Authority has been tried repeatedly but given up mainly because its effectiveness depends on the same resources support as at present, on reliable primary field-level environmental data, not gathered regularly now and on sustained political support. Technically analysing the issues involved, this article suggests a process shift towards a locally relevant, transparent, decentralised, participative and area-science–value-based approach that can strengthen environmental regulation from below.

On modeling a well casing for resistivity and induced polarization

Geophysics ◽  
1984 ◽  
Vol 49 (11) ◽  
pp. 2061-2063 ◽  
Author(s):  
James R. Wait
Keyword(s):  
Electrical Properties ◽  
Electric Dipole ◽  
Free Space ◽  
Eddy Currents ◽  
Interfacial Polarization ◽  
Induced Polarization ◽  
Mutual Impedance ◽  
The Earth ◽  
Horizontal Electric Dipole ◽  
Displacement Currents

In a previous communication I proposed an analytical model to simulate the electromagnetic (EM) and induced polarization (IP) response of a metal well casing (Wait, 1983). To facilitate the analysis, the earth was idealized as a homogeneous conducting half‐space of electrical properties (σ, ε, μ). The well casing was represented as a filamental vertical conductor of semiinfinite length that was characterized by a series axial impedance to account for eddy currents and interfacial polarization. A further basic simplification was to neglect displacement currents in the air; this was justified when all significant distances were small compared with the free‐space wavelength. Initially, the source was taken to be a horizontal electric dipole or current element I ds on the air‐earth interface. By integration of the results, the mutual impedance between two grounded circuits could be ascertained. In the absence of the vertical conductor (i.e., the well casing) the results reduced to those given by Sunde (1968) and Ward (1967).

Lessons Learned … About Curriculum: Five Years on and Half a World Away

2005 ◽  
Vol 24 (2) ◽  
pp. 111-126 ◽  
Author(s):  
Doune Macdonald ◽  
Lisa Hunter
Keyword(s):  
Physical Education ◽  
Lessons Learned ◽  
National Standards ◽  
Primary Field ◽  
Health And Physical Education ◽  
Construction Of Knowledge ◽  
The Social ◽  
Social Construction Of Knowledge ◽  
The Relationship ◽  
Selection Of

The knowledge, skills, and attitudes manifested in health and physical education school curricula are an arbitrary selection of that which is known and valued at a particular place and time. Bernstein’s (2000) theories of the social construction of knowledge offer a way to better understand the relationship between the production, selection, and reproduction of curricular knowledge. This article overviews contemporary knowledge in the primary field (production) upon which curriculum writers in the recontextualizing field may draw. It highlights tensions in the knowledge generated within the primary field and, using a case of the USA’s National Standards for Physical Education (NASPE), demonstrates how particular discourses become privileged when translated into curriculum documents in the recontextualizing field.

Sign in / Sign up

Export Citation Format

Share Document