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Report to Congress

Report to Congress PDF Author: United States. Department of Transportation
Publisher:
ISBN:
Category : Intelligent transportation systems
Languages : en
Pages : 44

Book Description

Report to Congress

Report to Congress PDF Author: United States. Department of Transportation
Publisher:
ISBN:
Category : Intelligent transportation systems
Languages : en
Pages : 44

Book Description

Cooperative Economic Insect Report

Cooperative Economic Insect Report PDF Author:
Publisher:
ISBN:
Category : Insect pests
Languages : en
Pages : 566

Book Description

Review of the Earth Mode Communication Program at AFCRL

Review of the Earth Mode Communication Program at AFCRL PDF Author: Leon A. Ames
Publisher:
ISBN:
Category : Antennas (Electronics)
Languages : en
Pages : 24

Book Description
The program in earth mode communications research at the U.S. Air Force Cambridge Research Laboratories is reviewed. Emphasis is placed on geological and geophysical problems encountered in the course of the program. Communications modes studied include: (1) 'deep-strata', wherein radio frequency electromagnetic waves are propagated between buried antennas over a path entirely within rock strata, and (2) 'conduction current', consisting of ULF conduction field communications between long, grounded dipoles. Deep-strata studies were carried out utilizing both loops and linear antennas immersed in the rock medium. Antenna and transmission path characteristics were studied under a variety of conditions and over paths up to 4.5 km in length. It was found that two of the greatest problems facing the communicator are the complexity of the earth's crust and its low values of electrical resistivity. Therefore, a geological and geophysical study was performed to evaluate possible transmission sites in the United States. Conduction field studies were performed using what was essentially the dipole-dipole geophysical resistivity sounding technique. Field tests were made at frequencies from 0.01 Hz to 10 Hz and at ranges to 32 km. (Author).

Chemical Abstracts

Chemical Abstracts PDF Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 1258

Book Description

Radio News

Radio News PDF Author:
Publisher:
ISBN:
Category : Electronics
Languages : en
Pages : 1098

Book Description
Some issues, 1943-July 1948, include separately paged and numbered section called Radio-electronic engineering edition (called Radionics edition in 1943)

German and English

German and English PDF Author: Felix Flügel
Publisher:
ISBN:
Category : English language
Languages : en
Pages : 954

Book Description

Journal

Journal PDF Author: Pennsylvania. General Assembly. House of Representatives
Publisher:
ISBN:
Category : Pennsylvania
Languages : en
Pages : 1342

Book Description
Includes extra sessions.

U.S. Army Register

U.S. Army Register PDF Author: United States. Department of the Army
Publisher:
ISBN:
Category :
Languages : en
Pages : 1100

Book Description

Rough Notes

Rough Notes PDF Author: Irving Williams
Publisher:
ISBN:
Category : Insurance
Languages : en
Pages : 644

Book Description
A journal devoted to insurance and the industries.

Reports

Reports PDF Author: Johns Hopkins Hospital
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1270

Book Description

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