CREG Journal (ISSN 1361-4800)

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Contents of journal 82
June 2013

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CREG Journal 82 (0-24) (PDF 6.8MB)        Individual articles may be available below

This issue has a cover date of June 2013 and was published on 28 June 2013.

 

Front Cover (1) (PDF 1.0MB)     

Juan Corrin flies his Speleo-Drone, fitted with additional lighting to enable underground operation. Photo: Mike Bedford.

 

Contents (2) (PDF 151KB)     

List of contents and masthead information.

 

Newssheet (3) (PDF 464KB)     

Diary Dates, Hidden Earth, Dowsing Debate (also see CREG forum), Raspberry Pi, Guest Editorials.

 

Speleo-Drone: Remote Flying Speleological Reconnaissance (4-6) (PDF 919KB)     

Juan Corrin has taken the AR.Drone, a smartphone or tablet-operated aerial reconnaissance quadrocopter, and describes how he has modified it for use in underground exploration.

 

Smart Pictures: Taking Underground Photos by Wi-Fi (7-8) (PDF 728KB)     

The recent availability of cameras featuring Wi-Fi and of associated smartphone apps prompted Andy Lillington to evaluate the use of a smartphone as a remote control and viewfinder.

 

Web Watch (8) (PDF 620KB)     

Peter Ludwig takes a look at the world of the Internet and offers some findings.

 

Cave Telephones Enter the 21st Century (9-14) (PDF 579KB)     

Stuart France presents recent developments of the single-wire cave telephone system which add modern features and fix the operational issues encountered with earlier versions from both cave rescue and design viewpoints.

 

We Hear (15) (PDF 130KB)     

News and events - Mike Bedford brings us the latest to impact the world of cave radio and electronics. Cave Radios in Space, Navigation without GPS, Robot Explores Mexican Cave, LED Droop Explained.

 

Building LED Lights for Cave Photography - Part 3 (16-19) (PDF 937KB)     

As an alternative to electronic flash guns, high-brightness LEDs now provide an attractive form of lighting for cave photograph. In this final part of his article, Footleg discusses the choice of battery and provides construction details.

 

LED lighting: how the world has got brighter [cregf]   See further reading on the CREG forum

David Gibson reminisces on the bicycle lamps that were around in the 1960s, which used an Ever Ready number 800 battery, and suggests that assessing the light output and duration would be an interesting exercise. See the posting on the CREG forum, bcra.org.uk/cregf).

 

Help Spread the Word (19) (PDF 241KB)     

The CREG team enthuses over our new low-cost online subscription and asks for your assistance.

 

Letters to the Editor (20) (PDF 66KB)     

Dowsing Skills, Dowsing and the 'Doctrine of Naive Analogy' (also see CREG forum).

 

Underground Positioning - Taking Radio-location to the Next Level (21-24) (PDF 1.8MB)     

Cédric Duchene of Infrasurvey introduces the UGPS3 system that is able to determine the position of an underground transmitter in real time using a surface receiver with three orthogonal loop antennas. Several case studies illustrate the system's ease-of-use and performance.

 

The Adventures of GREG (24) (PDF 1.0MB)     

Illustrations by Adrian Higgins with words by Mike Bedford.