Beta
×

Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!

Comments

top

Male Scent Molecules May Be Compromising Biomedical Research

FreshnFurter Now it starts! Ob: H2G2 (274 comments)

"These creatures you call mice, you see, they are not quite as they appear. They are merely the protrusion into our dimension of vastly hyperintelligent pandimensional beings."

Do YOU feel manipulated?

Signed: A male (smelly) scientist

about 3 months ago
top

Band Releases Album As Linux Kernel Module

FreshnFurter Re:GPL? (128 comments)

From dmesg

[ 421.406145] netcat: module license 'unspecified' taints kernel.
[ 421.406149] Disabling lock debugging due to kernel taint
[ 421.416664] [netcat]: netcat - Cycles Per Instruction - Kernel Module Edition - 2014
[ 421.416668] [netcat]: netcat is Brandon Lucia, Andrew Olmstead, and David Balatero
[ 421.416670] [netcat]: On the web at http://netcat.co/
[ 421.416671] [netcat]: 'ogg123 -

So yes

about 4 months ago
top

How loud is your primary computer?

FreshnFurter insensitive clod (371 comments)

I don't have computer you oaf

about 7 months ago
top

Cornell Researchers Unveil a Virtual Notary

FreshnFurter Re:This is about the stupidest thing for inventors (72 comments)

You are mistaken it is not disclosure. You just have proof that the document you produced, which only you can see, was certified to be generated on that day. It can be used if there is a dispute on prior knowledge. Let's say that you a Non disclosure agreement with someone and the topic is whatever you wanted to patent so they tell you what you wanted to patent. Then you have proof that you thought of this prior to the NDA. This could be important.

about a year ago
top

Cornell Researchers Unveil a Virtual Notary

FreshnFurter Re:Hold up in court? (72 comments)

Not only that. It is also important for scientists and inventors.
It allows to time stamp ideas. I just did one with one of my articles in draft form. Yes it is not ready to release to the public but the idea is solid. So having a version of this notarized would be interesting to see how this affects patenting, without going through the terrible long process of submitting and waiting. Also junior scientists working in a lab can timestamp their contributions.

about a year ago
top

My most frequent OS migration path?

FreshnFurter Alternative path (413 comments)

RSX-11 (PDP11)->VAX/VMS -> UNIX-OS (VAX)-> OS400 (AS400) -> Xenix (PC) -> Linux (Slackware) -> Linux (Debian) -> Ubuntu

Yep, that old: 8 inch floppies and cupboard sized 10MByte Hard-disk. Interesting things came along, monitors, tree-based directory structures, GUI, a mouse, TCP/IP, the internet.

I have been known to use ms-dos, windows 3,95,98,2000,ME,XP, Vista, 7 but try to avoid it like the plague. Also played with Mac but thought it too clean, no idea what was happening behind the pretty pictures

about a year ago
top

Why Does the US Cling To Imperial Measurements?

FreshnFurter Re:Not so bad to have different systems. (2288 comments)

Actually the SI unit for dose is Gray (Gy) which is J/kg and expresses the amount of energy used to produce ionization and it was originally developed for Air which by strange coincindence is almost equivalent to mammal meat as far as the atomic content goes. The Sievert adds a factor to take into account the biological effect of different types of radiation. If in addition the sensitivity of the irradiated organ is taken into account it is still called Sievert and is a different number. I therefore do not consider Sievert to be an SI unit.

Hope this helps

more than 3 years ago
top

Don't Cross the LHC Stream! (Maybe)

FreshnFurter Re:The solution (171 comments)

No not a joke the only reason why you would get a "catastrophic" event is likely because the beam is focused and as such has a very high flux on a very small volume as dose = energy /mass then the mass of the irradiated part is very high. In order to get a lot of dose to the hand it is better to tune the energy down in such a way that the total energy gets deposited in the object you are interested in. Also note that also the density of the material is very important. Therefore a tungsten block would retain much more energy than a hand. I you can give me the number of particles/square cm I can calculate exactly what the dose is for the hand. This is what I do for a living. And yes I have treated patients with neutron beams, proton beams and photon beams, so I know what I am talking about. My point is that everyone seemed to be overawed by the sheer energy of the beam, while that is not the point it has to be the right energy.

As I explained in the first post the notion of high energy beams having low stopping power is counter intuitive as your reaction shows.

Hope this helps

more than 3 years ago
top

Don't Cross the LHC Stream! (Maybe)

FreshnFurter The solution (171 comments)

I was amazed at the ignorance displayed in this thread. In radiation therapy proton beams are used a lot to treat cancer so the problem is well known.
Of course you will need o know the fluence of the beam (e.g. number of particles/ square cm/ second) and the amount of time the hand has been in the beam.
Usually these beams are of relatively low flux, the particles in the beam do have a very high energy. The next thing you need to determine is
the amount of energy that will be transferred to the tissue. For this we use the notion of stopping power (i,e, energy deposited under the form of ionizing collisions per unit length). This quantity depends on the charge of the particle (squared) and the inverse of the speed of the particle (squared). This means, and most people find this counter intuitive, that the higher the energy, the lower the amount of energy being deposited. So in this case the deposited energy is very low, e.g. the beam passes almost right through the hand. I do not have any stopping power numbers for these type of energies handy but can only presume that they are very low. Some caveats, these line of thought only follows direct interactions and collisional interactions with electrons.
Most likely there is a larger component of nuclear interactions and ionizations coming from recoil events. Which will increase the dose.
In order to get the maximum effect with a proton beam one has to tune the beam in such a way that it comes to a complete halt inside the persons body
this is about 200MeV for a human, what is several orders of magnitude lower than the energies here at hand (pun unintended).

Anyway interesting question and at my next exam I will be sure to put it in. Now we will see if any of my students read slashdot ;-)

 

more than 3 years ago
top

Studies Find Harm From Cellular and Wi-Fi Signals

FreshnFurter Re:900mhz-1ghz Can Cause problems. (474 comments)

In follow up to my own submission.

Unfortunately all negative studies, that are well repeatable and do not show any increased permeability, Foiled again!
If there is a mechanism, this would not be it.

Record 1 of 5
de Gannes, FP; Billaudel, B; Taxile, M; Haro, E; Ruffie, G; Leveque, P; Veyret, B; Lagroye, I. 2009. Effects of Head-Only Exposure of Rats to GSM-900 on Blood-Brain Barrier Permeability and Neuronal Degeneration. RADIATION RESEARCH 172 (3): 359-367..
Author Full Name(s): de Gannes, Florence Poulletier; Billaudel, Bernard; Taxile, Murielle; Haro, Emmanuelle; Ruffie, Gilles; Leveque, Philippe; Veyret, Bernard; Lagroye, Isabelle
ISSN: 0033-7587
DOI: 10.1667/RR1578.1
Record 2 of 5
Finnie, JW; Blumbergs, PC; Cai, Z; Manavis, J. 2009. Expression of the water channel protein, aquaporin-4, in mouse brains exposed to mobile telephone radiofrequency fields. PATHOLOGY 41 (5): 473-475..
Author Full Name(s): Finnie, John W.; Blumbergs, Peter C.; Cai, Zhao; Manavis, Jim
ISSN: 0031-3025
DOI: 10.1080/00313020902885045
Record 3 of 5
Masuda, H; Ushiyama, A; Takahashi, M; Wang, JQ; Fujiwara, O; Hikage, T; Nojima, T; Fujita, K; Kudo, M; Ohkubo, C. 2009. Effects of 915 MHz Electromagnetic-Field Radiation in TEM Cell on the Blood-Brain Barrier and Neurons in the Rat Brain. RADIATION RESEARCH 172 (1): 66-73..
Author Full Name(s): Masuda, Hiroshi; Ushiyama, Akira; Takahashi, Miyuki; Wang, Jianqing; Fujiwara, Osamu; Hikage, Takashi; Nojima, Toshio; Fujita, Koji; Kudo, Motoshige; Ohkubo, Chiyoji
ISSN: 0033-7587
DOI: 10.1667/RR1542.1
Record 4 of 5
Masuda, H; Ushiyama, A; Hirota, S; Wake, K; Watanabe, S; Yamanaka, Y; Taki, M; Ohkubo, C. 2007. Effects of subchronic exposure to a 1439 MHz electromagnetic field on the microcirculatory parameters in rat brain. IN VIVO 21 (4): 563-570..
Author Full Name(s): Masuda, Hiroshi; Ushiyama, Akira; Hirota, Shogo; Wake, Kanako; Watanabe, Soichi; Yamanaka, Yukio; Taki, Masao; Ohkubo, Chiyoji
ISSN: 0258-851X
Record 5 of 5
Franke, H; Streckert, J; Bitz, A; Goeke, J; Hansen, V; Ringelstein, EB; Nattkamper, H; Galla, HJ; Stogbauer, F. 2005. Effects of universal mobile telecommunications system (UMTS) electromagnetic fields on the blood-brain barrier in vitro. RADIATION RESEARCH 164 (3): 258-269..
ISSN: 0033-7587

more than 4 years ago
top

Studies Find Harm From Cellular and Wi-Fi Signals

FreshnFurter Re:900mhz-1ghz Can Cause problems. (474 comments)

Hmm, What is the reference article reporting this. The blood brain barrier not only keeps out the "bad" chemicals, but also prevents us from delivering life saving drugs to the brain. So the prize winning treatment will be inject the drugs, apply RF to the brain. Patient saved, I get the Nobel Prize. Is there a way to make sure you log this /. ? It was discovered here first. I know the guys at Cleveland. If this was true it would have been patented long ago. And gazillions of presentations at all the big conferences would be the reward together with fame and fortune. No matter how much they got from the "cell phone" dark suits.

Wait a minute I had already posted this http://slashdot.org/comments.pl?sid=210580&cid=17159284

I received exactly one reply to a engineering article with no substantial follow up generated. I don't think there is anything to it.

more than 4 years ago
top

Tomorrow's Science Heroes?

FreshnFurter Re:Sorry, No. (799 comments)

That Einstein did not believe in quantum mechanics is far fetched. This is the guy who invented the photo electric effect. He was well aware of the quantum nature of the electron orbits. What he doubted was the Kopenhagen interpretation. This (in a few very crude words) says that there is no way to observe the underlying truth and that we should stick to observables only. The Einstein Podolsky Rosen paper takes this logic to an extreme and comes out at the "spooky" interaction at distance. Note that everything stays within the boundaries dictated by the relativity theory in that not all information can be exchanged over the distance instantaneous but that part of the information already needs to have traveled the distance (the other half of the entangled pair),

The beauty is that he did not need to let his belief system dictate the logic of the argument. It might be that at the time his conclusions were wrong as the result he obtained was contrary to the experience he had up till now.

more than 5 years ago
top

Another Way the LHC Could Self-Destruct

FreshnFurter superfluid != superconductive (367 comments)

Temps for superfluidity are much lower than those needed for superconductivity. To get superfluid Helium you have to get a single isotope and cool it to something below 4K. The Helium used in the LHC is the normal kind (He3-He4 mix) and serves to get superconductivity in the magnets.

BTW every hospital has a few MRI using superconducting coils to get magnetic fields between 1 to 7 Tesla. The only thing to fear in the neighborhood of these babies is office chairs on wheels (scary but funny) and metal oxygen bottles (scary and not funny).

nuff said

more than 5 years ago

Submissions

top

This just in: Tin foil hats are flawed

FreshnFurter FreshnFurter writes  |  about 2 years ago

FreshnFurter writes "Apparently, problems exist in the manufacturing of tin foil hats. To quote the fine article:" the current helmet craze is likely to have been propagated by the Government, possibly with the involvement of the FCC""
Link to Original Source
top

FreshnFurter FreshnFurter writes  |  more than 7 years ago

FreshnFurter writes "An original job opening in the Netherlands seems to be shoe in for some of the slashdot audience: http://www.nationalevacaturebank.nl/vac/1212231/?s key=mmwn

The company is rockingstone which apparantly makes Windows software too.

The opening is looking for a "Kettingrokende, atheistische, niet al te autistische Linux freak" (i.e. Chain smoking, atheist, not too autistic Linux freak). The pension plan is interesting too.: "No bullshit about pensionplans, you get that yourself. You get to choose what insurance company or bank gets to do you over."

More specifics on personality: 1) No guys with mustaches, 2) No idiots who implement major changes on a server on friday afternoon.

Slashdotters, what are you waiting for!"

Journals

FreshnFurter has no journal entries.

Slashdot Login

Need an Account?

Forgot your password?

Submission Text Formatting Tips

We support a small subset of HTML, namely these tags:

  • b
  • i
  • p
  • br
  • a
  • ol
  • ul
  • li
  • dl
  • dt
  • dd
  • em
  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>