Search found 406 matches

by David Gibson
Sat 01 Sep 2018 10:20
Forum: BCA Web Services
Topic: 500 Internal Server Error
Replies: 0
Views: 607

500 Internal Server Error

If anyone's web site has suddenly started reporting "500 internal server error" this may be due to an upgrade at Apache. Check your error log, via control Panel / Metrics, and you may likely find that your server is reporting an error in your .htaccess file. A strong candidate for this error is that...
by David Gibson
Sat 25 Aug 2018 11:43
Forum: British Cave Research Association
Topic: News; August 2018
Replies: 0
Views: 612

News; August 2018

Cave & Karst Science 45(2) now published CKS 45(2) was mailed last week. The online version should be available by Monday 27 August. Note to BCRA Member Clubs Some of you have previously requested that your periodicals are mailed to a different address (e.g. your librarian or club hut). If this is ...
by David Gibson
Fri 24 Aug 2018 20:29
Forum: Cave Radio & Electronics
Topic: underground communication using seismic waves
Replies: 5
Views: 980

Re: underground communication using seismic waves

sounds interesting, Jim. A couple of questions... 1. Do you have a feel for the attenuation in the system? For a magnetic system, we would relate the transmitter's magnetic moment to the received magnetic field strength. What is the equivalent in seismic terms? Would it be to relate the pressure lev...
by David Gibson
Sat 11 Aug 2018 22:48
Forum: BCA Web Services
Topic: FTP problems on Britiac2 and Britiac3
Replies: 0
Views: 515

FTP problems on Britiac2 and Britiac3

If anyone is having problems using FTP on either of BCA's servers, from about 2100 on Thurs 09 Sept - try switching your FTP client from passive to active mode. That solved it for me and one other person. I dont know what's happened - I assume that as it happened on both servers, it is something Mem...
by David Gibson
Thu 02 Aug 2018 09:58
Forum: Cave Radio & Electronics
Topic: Studies on the Ellora & Ajanta Caves (India)
Replies: 1
Views: 561

Re: Studies on the Ellora & Ajanta Caves (India)

A wired camera might be better. You pay out the cable as the small child explores, and the small child can follow the cable to find its way home. Otherwise, dont you have small child lost in maze that no adult can enter?
by David Gibson
Sun 08 Jul 2018 14:33
Forum: BCA Web Services
Topic: PHP DIO module
Replies: 5
Views: 1298

Re: PHP DIO module

Asking Google, (see here ) it seems that the error is because my files are not at C:\php, because XAMPP has put them somewhere else. Executing pear config-set doc_dir C:\xampp\php\pear pear config-set cfg_dir C:\xampp\php\pear pear config-set data_dir C:\xampp\php\pear pear config-set test_dir C:\xa...
by David Gibson
Sun 08 Jul 2018 13:00
Forum: BCA Web Services
Topic: PHP DIO module
Replies: 5
Views: 1298

Re: PHP DIO module

Have you checked the process has permission to create that directory? Well, I wondered about that, but this is Windows we're talking about, so can permissions be an issue? But I will try what you suggested. Although... perhaps permissions can be an issue after all? In an unrelated exercise, Im tryi...
by David Gibson
Sun 08 Jul 2018 12:54
Forum: BCA Web Services
Topic: PHP Imagick module
Replies: 3
Views: 672

Re: PHP Imagick module

David Cooke wrote:I'll have to install that for you.

Have you considered GD Graphics which is already install?
That thought occurred to me in the middle of the night. I tested it just now and ... yes... it works. So no need for Imagick.
by David Gibson
Sat 07 Jul 2018 11:43
Forum: BCA Web Services
Topic: PHP DIO module
Replies: 5
Views: 1298

PHP DIO module

I want to use PHP's Direct IO functions (http://php.net/manual/en/book.dio.php ) on my local PC. So I have downloaded it from PECL (https://pecl.php.net/package/dio/0.1.0) but Im having problems installing it. I wondered if anyone has any experience of installing PEAR packages under XAMPP on Windows...
by David Gibson
Sat 07 Jul 2018 10:47
Forum: BCA Web Services
Topic: PHP Imagick module
Replies: 3
Views: 672

PHP Imagick module

I want to process a load of image files on britiac3 to produce thumbnails. Imagick seems a good way to do this, unless anyone has any better suggestions. But trying this from within PHP results in Fatal error: Class 'Imagick' not found . So... is there anything I can do to install this module, or is...
by David Gibson
Tue 03 Jul 2018 10:41
Forum: British Cave Research Association
Topic: News; July 2018
Replies: 0
Views: 940

News; July 2018

In this newsletter ... British Caving Library Updates BCRA Publicity Officer AGM Notice 29th Annual BCRA Cave Science Symposium BCRA Stock of Back-Issues CREG Journal 102 - now online Hidden Earth 2018 Hidden Earth Cave Science Photo Competition News can also be found on the forum at http://bcra.or...
by David Gibson
Tue 03 Jul 2018 09:35
Forum: British Cave Research Association
Topic: 29th Cave Science Symposium, 13 October 2018, Bristol
Replies: 4
Views: 1335

29th Cave Science Symposium, 13 October 2018, Bristol

British Cave Research Association; 29th Cave Science Symposium : Saturday 13 October, 2018 School of Geographical Sciences, University of Bristol FIRST CIRCULAR & CALL FOR ABSTRACTS, May, 2018 The British Cave Research Association is pleased to announce details of the 29th Annual Cave Science Sympo...
by David Gibson
Mon 04 Jun 2018 13:02
Forum: Cave Radio & Electronics
Topic: British Cave Monitoring Centre uses tinytag data loggers
Replies: 0
Views: 1130

British Cave Monitoring Centre uses tinytag data loggers

British Cave Monitoring Centre uses tinytag data loggers. The British Cave Research Association has installed temperature, relative humidity and drip count radio data loggers in the British Cave Monitoring Centre at Poole’s Cavern in Buxton, Derbyshire. Tinytag data loggers are an integral part of ...
by David Gibson
Mon 04 Jun 2018 13:01
Forum: British Cave Research Association
Topic: British Cave Monitoring Centre uses Tinytag data loggers
Replies: 0
Views: 1001

British Cave Monitoring Centre uses Tinytag data loggers

British Cave Monitoring Centre uses tinytag data loggers. The British Cave Research Association has installed temperature, relative humidity and drip count radio data loggers in the British Cave Monitoring Centre at Poole’s Cavern in Buxton, Derbyshire. Tinytag data loggers are an integral part of ...
by David Gibson
Fri 01 Jun 2018 13:03
Forum: Cave Radio & Electronics
Topic: CREG Journal 102 now published
Replies: 0
Views: 1057

CREG Journal 102 now published

CREG Journal 102 - The June 2018 issue - is now online at http://bcra.org.uk/cregj and will be posted to subscribers within the next few days, hopefully. If your online subscription has expired, you will find out when you try to log in. If your paper CREG subscription has now expired, it will say so...