Recent content by fatra2

Hello, So is LibreOffice. As a matter of fact, LibreOffice developers are mainly coming from the OpenOffice project, after Oracle mingle in the license. I would suggest LibreOffice, if you are looking for an office suite. It is licensed under GPL, which can only mean that it is the best...

Hi there, I fully support what Drakkith said. Furhtermore, there are some kind of tables for the maximum radiation the body can bear. Anyway, estimation of what should not be over. The topic is quite complex since the danger comes from the different types of radiation, whether the radiation is...

Hi there, 1GEV! Naturally occurring decays rarely decay with that much energy, firstly. Secondly, try to imagine the penetrating power and damage done by a 1GeV photon. Why not talk about TeV or PeV as a matter of talking. Of course, if you are expose to radiation with this type of...

Hi there, Alpha radiation from an external source does not penetrate the first layers of the body. How can it be dangerous if it does not penetrate, even with a weighing factor of 20? Cheers

Hi there, As Drakktih said, the harmfulness of radiation on the human body depends if you are talking about external or internal radiation. If you are standing next to a radioactive sources, the only real danger comes from the gamma radiation. The alpha and the beta are stopped pretty...

Hi there, I don't know about America, but I thought PhD students normally have an assistant position with their professor. Either as a teaching assistant or a research assistant are both possibilities. Is it really that you have to work 60h/weeks on your personal research? Cheers

Hi thre, I apologize for my first post. I guess I chose the wrong wording. But then again, if even with the most stable isotopes/particles we know (proton) the lifetime is not infinite, then how can you call them stable? From my point of view, innocent until proven guilty applies here...

Hi there, There seems to be a contradiction in your post. You say that protons are absolutely stable, but then you add that it's lifetime more than 10^33 years. From my definition of stable means that the lifetime is infinite. We know that the proton has an extremely long lifetime, but...

Hi there, If you are trying to explain the distance travel by a golf ball only from the length and the mass of the golf club, you will have huge difference between your calculations and reality. There are many other parameters that come into play: the angle of the club's face on the ball, the...

Hi there, It seems that you read many different papers and articles, without necessarily differentiating the topics. I will try to explain this in a simple manner, but still being correct. You have four basic interactions: gravity, electromagnetic, nuclear strong, and nuclear weak. These...

Hi there, Practically everyday! Ok, I still have the old style TV (no flat screen or anything). This is precisely what happens in these old devices. So if you want to "play" around with a CRT, just pick up an old TV or PC monitor from the dump. Strip it apart, and you will be left with a...

Hi there, Ok, but if I look at the "handbook of Chemistry and Physics", I find that Cf-252 is not a neutron emitter. It decays through the emission of an alpha particle. Anyway, for the time being this is not relevant, except for the energy of the neutron decay. From the activity of the...

Hi there, What kind of dose are you hoping to calculate: the air-kerma, the absorbed dose, the equivalent dose, the effective dose, the ambient dose H*(10), the ambient dose H*(0.07)? Then, will your neutron source give a homogeneous field, which body part will be exposed to it, what is the...

Hi there, www.unscear.org is probably the best place to find the latest recommendations from the UN and the IAEA. Cheers

Hi there, One thing that I noticed, with any web browser, is that flash can consume most of the CPU in your PC. The first I would suggest before changing anti-virus, or running for hours an virus detector, is to install addons that block flash. If you run a webpage where you so desperately need...