David Gibson

Server Configuration Problem

This page has detected a possible server configuration problem. If, when you reload this page the message goes away, then all is well. If the message remains, it means that pages on this web site will not display properly, and it is something that I need to investigate further.

Technical detail: PHP is not being parsed - either due to a server config problem (possibly due to server migration or someone in admin messing with the cpanel behaviour), or because this is a stale or off-line copy of the page.

David Gibson

On the Internet since 17th May 1994. You wont find me on Facebook or Linked-In. I only rarely tweet at @I_amDavidGibson. I live in Leeds, UK.

* My Speaking Clock doesnt actually speak - you have to do the talking yourself. See: Speaking Clock. Unlike the clock on the BBC's web site (see news item here) my clock is accurate!.

This web page will attempt to obtain an accurate time setting from the web server. If this message alters, it has been successful. Your computer's local clock may well be wrong.

My Speaking Clock*

If this text appears for more than a fleeting moment then something may have gone wrong, e.g.

The web server is slow in responding
You do not have JavaScript enabled
You are running an old version of JavaScript
There is a programming error - my fault
Your computer is still 'thinking about it'

Work

I have an MA degree in Maths / Engineering from Cambridge University and a PhD from the University of Leeds (School of Electronic and Electrical Engineering). From 1 Jan 2016 I have been a Senior Research Fellow at the University of Exeter's Camborne School of Mines (College of Engineering, Mathematics and Physical Sciences). See staff profile

although, since Im only on a medium-term contract, that might eventually disappear, to be found only in the Internet Archive at the Wayback Machine

Selective lists of my publications are given on my University of Exeter

page, and at ResearchGate

. You can also search the CREGJ database

and take a look at my Cave Radio web page. If you've come here because of a professional interest then you will already know my fields of work and that Im available for consultancy and contract work – Please email me for a version of My CV that includes full contact information (The online version has been redacted).

My PGP Public Key is here. (footnote)

My ORCID ID is 0000-0002-1374-9390

(but that's not very useful)

Play

1 January 2012: I have removed most of the content of this web page, as it was all getting rather out of date. Perhaps I'll edit it and replace it one day? Places to go...

New items...

2021: Article:

A Simple Class-D Single-Sideband Modulator

2021: Article:

Data Protocol and Coding Examples for the British Cave Science Centre

2021: Article:

The SSB Paradigm for Cave Radio is Outmoded - Is it Time to Move On?

2021: Article:

Fundamentals series: Cave Radio Antennas

2021: Article:

Energy Harvesting with Electrets

2020: Article:

The Parallel-Fed Voltage Multiplier

2020: Article:

Regenerative Brake Charges Your Caving Lamp Whilst You Abseil

2019: Software: Sieve of Eratosthenes (simple demo)

2018: Essay: What is Steampunk?

2018: Essay:

Ferroelectric v. ferromagnetic materials

2018: Essay:

Conductivity measurement of ionic solutions

2018: Article:

Impedance-Balancing Rule for Op-Amps (Originally written in 1991)

2017: Notes: Character Set Problems

2016: Info:

Staff profile at University of Exeter

2015: Article: Stereoscopic vision with reduced definition in one eye

Useful list of HTML entities

Interesting Fonts: Sans forgetica

, Averia

, Untitled Sans

Useful info on installing encryption in Thunderbird: Mozilla support

, Kate's Comment

In Leeds, today, sunrise is at 08:00:15 (GMT); sunset at 15:49:58 (GMT)

In Falmouth, today, sunrise is at 07:57:15 (GMT); sunset at 16:21:07 (GMT)

This page, http://site2.caves.org.uk/mcrosolv/index.html was last modified on Wed, 27 Oct 2021 12:44:04 +0100
(Running on britiac3 at 31.25.186.126)