Archive for the ‘Science’ Category

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America needs to rid itself of dependence on foreign…


2010
05.10

ISOTOPES!

Lost in all the discussions about the effects of Iceland’s volcanic activity and how it is affecting people’s ability to travel across the Atlantic is the fact that it is affecting healthcare here in the USA.

The story is pretty straightforward: there are only a handful of places where we can acquire molybdenum-99 and technetium-99m which are used in nuclear medicine and medical imaging.

Fast Facts on Molybdenum-99 - Where Is It Made?

To get an idea as to how these isotopes are used, here’s a snippet from medpagetoday.com:

The technetium-99m is used in more than 16 million nuclear imaging procedures every year in the U.S. alone for, among other things, sentinel node biopsies in cancer surgery, bone scans, and staging cancer patients.

The interesting thing is that (as you can tell from the map), this material is not available domestically. Everyone wants to fight tooth and nail politically over drilling (or not drilling), or building more nuclear plants (or not), and reforming healthcare (or not). But it isn’t obvious how all of this is interrelated, and how, for example, our lack of domestic capability to produce isotopes from our own nuclear plants might compromise our ability to keep up with the needs of patients regardless of what our healthcare policies look like.

Now, for added drama, let’s have a volcanic eruption in Iceland that stalls flights to/from Europe.

Lava flow from the Icelandic volcano

Concurrently, let’s have an outage of the only Canadian nuclear reactor that produces these isotopes. Back to medpagetoday.com

But the main source of supply for North America — the NRU reactor in Chalk River, Ontario — has been shut down since last May and isn’t expected back online until April at the earliest. (See Canadian Reactor Shutdown Slows Nuclear Medicine)

Meanwhile, one of the reactors that has been picking up the slack — the Petten facility in the Netherlands — is to shut down this week for six months of maintenance.

So far, clinicians have been “getting by,” according to Robert Atcher, PhD, of the University of New Mexico, who is past president of the Society of Nuclear Medicine and chairman of its isotope committee.

By the way, that article about the shortage was written *before* the Icelandic volcano erupted. So if it was a crisis before the eruption, imagine what it is like now…

So now you get scenes like the one in my doctor’s office — where people are being turned away because we lack a sufficient amount of material to actual treat patients.

Who needs death panels and bread lines when our existing (and currently, “unreformed”) system can still experience shortages like this? This problem would occur regardless of the system in place as long as we have a dependence on others for critical materials.

So, sure, people may not like have a nuclear reactor in their backyard, but you may notice that the United States of America does not produce any of it. Zip. Zilch. We’ve “outsourced” all of the production of this material to other countries, the closest of which is Canada. And while we have “connected the dots” to see how a dependence on foreign oil might be a fundamentally bad idea given that the states that produce that oil seem to harbor a lot of anti-American sentiment among their populace, and I have to wonder if everyone who is being a nimby might be a bit short-sighted. We need to make sure we are a self-sufficient state, and we need to balance the need to globalize with the ability to sustain ourselves should the geopolitical (or, as in this case, the environmental) landscape change. And we need to take a holistic view of these issues and stop letting partisans whip everyone in to a frothy rage over things that don’t compute when taken together.

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Aviation Technology For Idiots


2008
06.27


Pulse Detonation Engine Jet:  The Blackswift

Unfairly or not, Fox News is often blasted for “dumbing down” their interviews with scientists and folks in high tech. Well, in this interview, I think I can fairly say the interviewer comes across as a complete moron… just listen to him as he gushes enthusiastically like a boy racer about the simulated takeoff:

(1:03 in… clock on lower left shows 2:10 remaining in video) Check that out! You see that go off the runway? It was gone.

I knew we had a mouth-breather when I heard that, but he keeps going…

(1:48 remaining) Is that 3,000 miles per hour?

…and he wraps up the interview with this priceless quote, which reminds me of something Beavis might say:

(0:15 remaining in video) I wonder what Wilbur and Orville are thinking about this? Huh huh! Cool!

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Girls Just Wanna Have Fun


2008
06.11

The title is loosely associated with the topic of this posting. ;-)

From BBC.com:

Hints of ‘time before Big Bang’

By Dr Chris Lintott
Co-presenter, BBC Sky At Night, St Louis, US

A team of physicists has claimed that our view of the early Universe may contain the signature of a time before the Big Bang.

The discovery comes from studying the cosmic microwave background (CMB), light emitted when the Universe was just 400,000 years old.

Their model may help explain why we experience time moving in a straight line from yesterday into tomorrow.

Details of the work have been submitted to the journal Physical Review Letters.

The CMB is relic radiation that fills the entire Universe and is regarded as the most conclusive evidence for the Big Bang.

Although this microwave background is mostly smooth, the Cobe satellite in 1992 discovered small fluctuations that were believed to be the seeds from which the galaxy clusters we see in today’s Universe grew.


Cosmic microwave background could hold clues about the Big Bang

Dr Adrienne Erickcek, from the California Institute of Technology (Caltech), and colleagues now believe these fluctuations contain hints that our Universe “bubbled off” from a previous one.

Their data comes from Nasa’s Wilkinson Microwave Anisotropy Probe (WMAP), which has been studying the CMB since its launch in 2001.

Their model suggests that new universes could be created spontaneously from apparently empty space. From inside the parent universe, the event would be surprisingly unspectacular.

Arrow of time

Describing the team’s work at a meeting of the American Astronomical Society (AAS) in St Louis, Missouri, co-author Professor Sean Carroll explained that “a universe could form inside this room and we’d never know”.

The inspiration for their theory isn’t just an explanation for the Big Bang our Universe experienced 13.7 billion years ago, but lies in an attempt to explain one of the largest mysteries in physics – why time seems to move in one direction.

The laws that govern physics on a microscopic scale are completely reversible, and yet, as Professor Carroll commented, “no one gets confused about which is yesterday and which is tomorrow”.

Physicists have long blamed this one-way movement, known as the “arrow of time”, on a physical rule known as the second law of thermodynamics, which insists that systems move over time from order to disorder.


Nasa’s WMAP has been studying the CMB since 2001

This rule is so fundamental to physics that pioneering astronomer Arthur Eddington insisted that “if your theory is found to be against the second law of thermodynamics I can give you no hope; there is nothing for it but to collapse in deepest humiliation”.

The second law cannot be escaped, but Professor Carroll pointed out that it depends on a major assumption – that the Universe began its life in an ordered state.

This makes understanding the roots of this most fundamental of laws a job for cosmologists.

“Every time you break an egg or spill a glass of water, you’re learning about the Big Bang,” Professor Carroll explained.

Before the bang

In his presentation, the Caltech astronomer explained that by creating a Big Bang from the cold space of a previous universe, the new universe begins its life in just such an ordered state.

The apparent direction of time – and the fact that it’s hard to put a broken egg back together – is the consequence.

Much work remains to be done on the theory: the researchers’ first priority will be to calculate the odds of a new universe appearing from a previous one.

In the meantime, the team has turned to the results from WMAP.

Detailed measurements made by the satellite have shown that the fluctuations in the microwave background are about 10% stronger on one side of the sky than those on the other.

Sean Carroll conceded that this might just be a coincidence, but pointed out that a natural explanation for this discrepancy would be if it represented a structure inherited from our universe’s parent.

Meanwhile, Professor Carroll urged cosmologists to broaden their horizons: “We’re trained to say there was no time before the Big Bang, when we should say that we don’t know whether there was anything – or if there was, what it was.”

If the Caltech team’s work is correct, we may already have the first information about what came before our own Universe.

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…in bed.


2008
05.08



NASA will pay $17,000 for you to stay in bed for 3 months


It would be even better if you could share the bed with someone special… :-)

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A boomerang?


2008
04.14


MRI of couple having sex

From Wired.com: “In the 1990s, Dutch researchers took MRI scans of couples having sex and discovered, among other things, that the penis is shaped like a boomerang during missionary-position intercourse. The men had more trouble remaining stimulated in the MRI scanner than the women. Viagra helped, however.”