CREG Journal (ISSN 1361-4800)

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Contents of journal 80
December 2012

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CREG Journal 80 (0-24) (PDF 7.6MB)        Individual articles may be available below

This issue has a cover date of December 2012, but was published on 14 February 2013.

 

Front Cover (1) (PDF 1.6MB)     

Andy Snook descending a cascade in Swildons Hole. A 1300 lumen Scurion K was used to light the shot, which demonstrates the effect of sustained illumination discussed in Footleg's article in this issue. Photo: Steve Sharp

 

Contents (2) (PDF 77KB)     

List of Contents and masthead information

 

Newssheet (3) (PDF 53KB)     

Cave Technology Symposium, Check your Waste Bin, Field Meetings

 

We Hear (4-5) (PDF 276KB)     

News and events - Mike Bedford brings us the latest to impact the world of cave radio and electronics. Power from the Air, Energy Scavenging: An Opportunity for Cavers?, The Elektor Design App, Energy Funnels Boost Solar Cell Performance, Spherical Solar Cells, Sub-surface Surveying with Atomic Clocks, New Approach to 3D Scanning, 3D Printing Price Breakthrough, New Amateur Allocation at MF, Paper Batteries.

 

Low Frequency Amateur Radio (6) (PDF 49KB)     

John Rabson summarises the state of play with regard to amateur radio operation in the VLF, LF and MF bands.

 

Building LED Lights for Cave Photography (7-10) (PDF 1.2MB)     

As an alternative to electronic flash guns, high brightness LEDs now provide an attractive form of lighting for cave photography. In part one of a two-part article Footleg describes some of the benefits of continuous illumination before discussing his choice of LED for use in a practical light for photography and video.

 

CaveSim Crawls with Electronics (11-12) (PDF 683KB)     

Cross a realistic crawl-through cave obstacle course with video game scoring for your caving agility. Dave Jackson explains how CaveSim provides fun and training for novices and cavers alike

 

An Android Digital Survey Device with no Custom Electronics (13-15) (PDF 561KB)     

Looking for a cost effective alternative to the DistoX, Chris Hunter chose to exploit features of an Android smartphone and combine it with a laser distance measure. The design overcomes interfacing issues by employing the smartphone camera and optical character recognition to import distance measurements into the smartphone.

 

Why Won't Dowsing go Away? (16-19) (PDF 1.7MB)     

In the second part of a two part article on the controversial technique of dowsing, John Wilcock and Geoff Bagley investigate its success in cave detection and describe some recent work aimed at discovering how it might work. (See: Dowsing and the 'Doctrine of Naive Analogy', Letters CREGJ 82 and the expanded letter here, on the CREG Forum).

 

Dowsing and the Doctrine of Naive Analogy [cregf]   See further reading on the CREG forum

Followers of this doctrine, asserts David Gibson, disregard several basic principles of science. They assert that 'any hypothesis has value', and they do not obey the axiom 'Quod supplantandum, prius bene sciendum', or 'Whatever you hope to supplant, you will first know thoroughly'. Instead, they produce hypotheses in ignorance of basic physics, hence the 'Naive Analogy'. (See: Dowsing and the 'Doctrine of Naive Analogy', Letters CREGJ 82 and the expanded letter on the CREG forum, bcra.org.uk/cregf).

 

Android Underground (20-22) (PDF 326KB)     

Mike Bedford looks at the potential uses for Android smartphones and tablets underground and suggests that their inherent durability and low-cost ruggedisation options will lead to much greater use of computers in caves.

 

Letters to the Editor (23) (PDF 73KB)     

3D Photography, Caving Stuff - For Sale, Cave Radio APRS Experiment

 

Web Watch (23)  For download see previous item

Peter Ludwig scans the web looking for interesting titbits. Here's the latest collection.

 

The Adventures of GREG (24) (PDF 894KB)     

Illustrations by Adrian Higgins with words by Mike Bedford.