Skip to main content

Your conviction notice

Heating and the safety of medical ultrasound, Magnetic Resonance Imaging and Mobile Phones
Francis Duck, professor at the University of Bath and Honorary Medical Physics professor at the Royal United Hospital, Bath.
BRLSI Wednesday 18th May 2011

Francis Duck graduated from Nottingham and obtained a PhD from London University.

Ultrasound 2 - 20MHz radio frequency.
MRI and Mobile Phones 50MHz – 2GHZ radio frequency.

·      This can cause tissue heating via the same mechanism as microwave heating in a microwave oven. (He did not state this himself)

·      Blood travels through the capillaries to carry away heat.

[On the speaker:
I find he has a very annoying manner. He speaks very badly dithering with “um” and “err” to waste time. He also has a poor rapport with the audience. His presentation is disorganised and the gaps in his delivery seem as though he is thought disordered.]

The human body rigorously regulated temperature to +0.1°C and -0.4°C over a 24 hour period.
·      Core temperature of 43°C would cause death.
·      Exercise could raise body temperature to over 40°C.

[On the speaker and the talk:
Strange facts and numbers don’t seem to really tie together very well.
What he said about how MRI works earlier in the talk means I don’t think he is reliable.
I think he might be depressed. His attitude is bad – I think he is trying to act like a “quack” a phoney doctor.]

·      Heat is not a carcinogen
·      Heat CAN DAMAGE PREGNANCIES!
-          Very scientifically rigorous data he assures us

[On the speaker and his talk:

One problem with his style is that it is very watery he isn’t really saying anything and also one does not feel comfortable sitting back and listening to what he says – one would have better things to say than him generally on physics. It is really a 1 slide talk. As I said I was thinking of the ducks going “quack” and how I chased a sitting duck off its perch on the embankment by the river into waking up and jumping into the river the other day.]

Comments

Popular posts from this blog

Notes from Energy & Utility Forum 2017

1. Robert Symons, CEO of Western Power Distribution said: “Energy demand could rise by 100% by 2030. Smart grids will be needed to manage electric vehicle charging so that the usage does not exceed the supply capacity at any time during the day.” 2. Spoke to Harry Vickers, Business Development Manager of Camborne Energy Storage, Camborne Capital at the Energy and Utility Forum in London on October 23rd 2017. He told me his company is working with Elon Musk to bring Tesla battery grid storage solutions to the UK. 3. Spoke to Sally Barrett-Williams, Chairman of Energy and Utility Forum on October 23rd, who said subsidies for solar projects had ended and her company’s focus has shifted to energy storage schemes. 4. Spoke to Simon Dowland, PhD, at 13:00 on Sunday 29th October, Simon is now working up in Cambridge at the Cavendish Physics Laboratory at the University of Cambridge, he is working in industry for the company Eight19 Ltd a spin off from a research project to bring ne...

Astronomers Conference Bath

William Herschel Society and the Society for the History of Astronomy Conference at BRLSI, 02 nd April 2016 1       John Chuter on Somerset Astronomers – British Astronomical Association Names in development of astronomy in Somerset: Roger Bacon 12th-13th century John Pond 18th century Observatory at Westbury sub Mendip John George Hickley 1810-1889 Rector of Walton church, rectory now owned by Millfield School. Sent letter of invitation to astronomical scientific society to local Conservative MP. Rev Phillips 1868-1942 Had his own observatory on Headley and made some drawings of Jupiter. Reginald Waterfield Locally educated, early WHS member Harold Ridley Bequeathed £59,000 to BAA for fund in his name. From treasure trove of items: Record of total eclipse in Sweden in 1851. Sir John Hippisley 1804-1898 Another wealthy astronomer with an observatory at Stoneaston Park, whose image is similar to that of Sir John Naismith. ...

We are mighty full of ourselves now, aren't we?

Vice-President Communications, Anthony Gaskell OE. Formula 1 needs more money in it to go back to how it was before. They need to get more serious. This is reminiscent of the good old days, the jet-set life and clean country living, where furniture and furnishings were made to the highest possible standard and there was no compromise on quality. Bad eye sight is like bad posture, it can be corrected without drugs or mechanical support. Eye-sight is a skill just as much as it is a transient attribute, many Opticians and others would say that eye-sight degrades with age and I would call them eccentric as typically one can expect that eye-sight would improve with age unless there was a problem. Ageing is a disease. A white British man with a PIO card as a businessman in Dubai , disappointed at a meeting. It is believed that Indians are descended from white-skinned peoples and that the truest Indians still have the whitest...