On 29.08.2012 15:30, Martin Brown wrote:
On 29/08/2012 13:00, Jo Stein wrote:
....
What is you weight. I can compute similar figures for you. It is a
very simple formula given on page 133 in this book:
http://searchworks.stanford.edu/view/8819091
I could have scanned the page for you. Here follows the same page
in Norwegian as I am sure that a smart guy like you will be able to
tell where Thormod Henriksen and David H. Maillie went wrong:
They didn't say that. Although the way they are presenting the data
on p133 is confusing for non scientists and you have comprehensively
demonstrated your cluelessness in referencing it with wonderful
aplomb.
They guesstimate the number of *ionisations* caused by all natural
radiation by taking the annual dose energy and dividing into it the
energy needed to ionise air of 34eV. This is *very* misleading.**
You are 100,000x less radioactive than this crazy description
implies!
The distinction is between radioactive disintegrations per second and
the number of electronic ionisations caused by the fast particle
track. The latter is a larger number but not to quite the extent they
claim.
A single alpha particle will cause a fair number of ions to be formed
before running out of steam. A penetrating hard X-ray may go right
through without causing more than a handful of events with its energy
largely unchanged. The body is not opaque to all natural radiation.
I presume they have an axe to grind as the presentation on p133 is
bordering on dishonest.
Here I found the digital version of the norwegian book:
http://www.mn.uio.no/fysikk/tjeneste...skap/straling/
Why dont you write your correction in more detail and send it to the
authors?
I am a friend of Per Wethe and will send your comments to him.
The basic fact is found he
http://www.mn.uio.no/fysikk/tjeneste.../straling/#k10
Now animals and humans exposed to radiation, the blood-forming
organs (bone marrow) to react quickly. At high doses, the production
of both red and white blood cells and platelets, decrease as shown in
Figure 10.4. When the production of blood cells is reduced, the
immune system fails, and after one to two weeks can result in fatal
infectious diseases. If the radiation doses are less than 4-5 Gy, it
is perfectly possible for the bone marrow will resume production of
blood cells, and the survival chances are great. This occurs within
three to four weeks, and consequently, 30 days a reasonable chosen
limit for a will call "acute stråledød".
We can determine the LD50 dose for a variety of animal species, and
some values €‹€‹are given in Table 10.1. Some single-celled animals
(such as bacteria, tøffeldyr or paramecium) can survive doses of
2000-3000 Gy.
When it comes to people, we have not enough information to set a
specific LD50 dose. The reason is fairly obvious - we can not do
radiation experiments on humans. Until today, the random accidents
given us some information that we can build on.
We find that the LD50 dose for Man is 2 - 3 Gy
and we are designed to tolerate far more than the
normal background radiation.
Harry do not understand this and he write:
This is all government propaganda so they can build nuclear reactors
(and collect backhanders)
Now Martin Brown presume that
Thormod Henriksen (born 1928) is professor of biophysics at the
University of Oslo. He has worked with dosemetri and radiation
effects on proteins, DNA and hormones. In recent years he has worked
with ozone and UV radiation.
Find Ingebretsen (b. 1937) is a professor of nuclear physics at the
University of Oslo. He works on experimental nuclear physics,
radiation physics and energy physics (solar).
Anders Storruste (b. 1917) is Associate Professor at the University
of Oslo (retired). His area of €‹€‹expertise is nuclear physics, and he
is especially concerned with radiation hygiene problems associated
with radon in Norwegian homes.
Terje Strand (b. 1960) works at the Norwegian Radiation Protection
Authority, but is also a professor of radiation and health physics at
the University of Oslo. He has worked with the study of natural
radiation, especially radon issues, as well as studies in connection
with the discharges of radioactive substances.
Tove Svendby (b. 1967) works with ozone and UV issues. She is one of
the main responsible for environmental exhibition "Delicious is the
sky blue" which opened at the Norwegian Museum in September 1992.
Per Wethe (b. 1940) works at the Institute for Energy Technology at
Kjeller. He has worked on problems in the nuclear area, including
reactor safety, radioactive waste and nuclear energy & environment.
all have some axe to grind. He has found something bordering on
dishonest in their book.
He should read the book by Wade Allison and then we can try to cure
harry for his delusion.
The Natural Philosopher has a worse type of delusion and he may also be
too old to be cured.
**Unskilled and Unaware of It: How Difficulties in Recognizing One's Own
Incompetence Lead to Inflated Self-Assessments, Justin Kruger and David
Dunning, Cornell University, Journal of Personality and Social
Psychology, vol 77, no 6, p 1121-1134 (1999)
--
jo
"Anti-intellectualism has been a constant thread winding its
way through our political and cultural life, nurtured by the
false notion that democracy means that 'my ignorance is just
as good as your knowledge.'" -- Isaac Asimov