R/€ = 15.98 Change: -0.09
R/$ = 14.12 Change: -0.05
Au 1326.28 $/oz Change: 11.28
Pt 804.85 $/oz Change: 17.39

Terry Mackenzie-hoy

Terry Mackenzie-hoy

Mackenzie-Hoy is a consulting acoustics and electrical engineer –

Motorised pogo sticks

15th February 2019 During World War 2, it was very important that signals from the various governments involved in the war to the various armies, navies and air forces be kept secret. Signals, or messages, had to be in code or cipher to make them difficult for the opposition to read. A 'code' and a 'cipher' are not... 

Smart grids

8th February 2019 An Internet definition of a smart grid is: "An electricity network based on digital technology that is used to supply electricity to consumers via two-way digital communication. This system allows for monitoring, analysis, control and communication within the supply chain to help improve... 

The perfect public address system

1st February 2019 In September 2108, Patricia de Lille gave a speech in the Cape Town City Hall as part of the opening of a revamped hall, which project had taken nine months. Despite the hall having a reverberation time of 2.3 seconds, her speech was clear, understandable and free from distortion. The reason for... 

Beta testing

25th January 2019 Recently, we (the okes in the office an' me) bought two of a device that is supposed to repel insects. Well, not only. The box (as seen on TV) has a statement that it is an "ultrasonic pest repeller" and will repel "rats, roaches, flies, spiders, mice, fleas, ants and mosquitoes".  The devices is... 

Cash flow

18th January 2019 In the cartoon the two guys are talking. One says, I have a design problem. The other guy says, there are no problems, only challenges. One such challenge in any consulting engineering business is cash flow. All clients of consulting engineers know that, if they go to the supermarket, they have... 

Working smarter

14th December 2018 As I become older, I regret that there are some inventions, electrical and otherwise, which will not be created in my life time. It would be a tragedy if I did not share the invention ideas with you in the hope that some young dynamo would take up the baton. Starting simple. Crying children are... 

Fusion reactors: Tokamak

7th December 2018 In 'nuclear fission', the nucleus of an atom breaks up into two lighter nuclei. Okay. I will say that again. You get some atoms which are heavier than others, right? Like lead is heavier than iron (that's why you get more for it at the scrapyard). So uranium is a heavy atom. If you fire a small... 

Killing the professions

30th November 2018 I am a qualified electrical engineer who holds a university degree and is registered as a professional engineer with the Engineering Council of South Africa (ECSA). I am a member of the South African Institute of Electrical Engineers. I have a consulting practice and we offer acoustics and... 

Redoubling Your Effort

23rd November 2018 The definition of 'fanaticism' is when you redouble your effort when your aim is forgotten. And in that world of climate change, that area of cosy illusions and comforting half truths, this has finally occurred. The climate believers think that carbon dioxide (CO2) is causing the world to heat... 

A small town in Germany

16th November 2018 "Come on, Terence, " said Harry, "don't you know about the Hannover Fair ?" "In Hannover, Germany?" I said. "Exactly," he answered. 

2 3 4 5 6 7 8 9 Next Last


Engineering News is a product of Creamer Media.

Other Creamer Media Products include:
Mining Weekly
Research Channel Africa

Read more


We offer a variety of subscriptions to our Magazine, Website, PDF Reports and our photo library.

Subscriptions are available via the Creamer Media Store.

View store


Advertising on Engineering News is an effective way to build and consolidate a company's profile among clients and prospective clients. Email

View options
Free daily email newsletter Register Now
Register Close