Retro-Reflector is just a fancy name for a very old method of having a series of prism under I think 42 degrees angles (I'll have to check exact figure) that shots the beam back along the same line it came from. If they used ordinary mirrors even slightest imperfection might mean that light beam coming back would have missed the entire earth let alone the target in California.
Posts by kenai
-
89Moon Landings - Real or Fake?
by Black Man ini've always wondered about this, especially recently.
i've always contended that they were real and ignored the conspiracy theories.
but if they were real, why hasn't nasa been able to send a man to the moon since the 1970s?
-
-
-
89
Moon Landings - Real or Fake?
by Black Man ini've always wondered about this, especially recently.
i've always contended that they were real and ignored the conspiracy theories.
but if they were real, why hasn't nasa been able to send a man to the moon since the 1970s?
-
-
kenai
Either way, it was a huge waste of money that could have accomplished something way better for humanity.
ya mean like discovery of non-radioactive Helium 3 where couple of tons can produce energy needed for the entire year of energy hungry country such as US of A. Not to mention that there's enough of it to mine it for many generations to come and it is non-polluting ...
-
99
FemaleThinking?
by R.Crusoe ini have often heard women speak about men who think with their meat and two veg!.
it is as if they lay claim to a theory that all male agendas form as thoughts which mainly travel down the cerabal cortex and out through the zipper before coming to life in the real world.. but how do men think women think?.
.
-
-
kenai
kind of like this ;)
Can be very tough and thought provoking then all of a sudden get emotional, or was it other way around.
-
89
Moon Landings - Real or Fake?
by Black Man ini've always wondered about this, especially recently.
i've always contended that they were real and ignored the conspiracy theories.
but if they were real, why hasn't nasa been able to send a man to the moon since the 1970s?
-
-
kenai
But if they were real, why hasn't NASA been able to send a man to the moon since the 1970s?
It couldn't have anything to do with that pile of cash visible from the moon they needed to get there in the first place, could it?
On the second thought how could have they landed on the moon since earth is flat and held by a giant turtle that goes all the way down, no room for tiny human craft to fly about without being smitten by a hungry turtle, there is shortage of flies in space too. Not to mention the need to penetrate through crystal spheres, that would have destabilized entire universe.
-
-
-
kenai
LMAO!
-
14
Scanned PDF of Russell's 1st Book: The Object & Manner of Our Lord's Return
by cabasilas inthis exists as a text file in a couple of different editions, but as far as i know it's never been posted as a scanned image of the original printed edition.
it's from a copy of a photocopy, so the clarity is not perfect but it's plenty readable.
kudos also to a fellow jwder who helped me get the ocr to work better.
-
-
kenai
Price ten cents
About right, though I'd still think about it.
-
2
Hearts from cadavers beat anew: study
by kenai inparis (afp) in experiments that would make dr. frankenstein jealous, us scientists have coaxed recycled hearts taken from animal cadavers into beating in the laboratory after reseeding them with live cells, according to a study released sunday..
if extended to humans, the procedure could provide an almost limitless supply of hearts, and possibly other organs, to millions of terminally ill people waiting helplessly for a new lease on life.
approximately 50,000 patients in the united states alone die every year for lack of a donor heart, and some 22 million people worldwide are living with the threat of heart failure..
-
-
kenai
PARIS (AFP) — In experiments that would make Dr. Frankenstein jealous, US scientists have coaxed recycled hearts taken from animal cadavers into beating in the laboratory after reseeding them with live cells, according to a study released Sunday.
If extended to humans, the procedure could provide an almost limitless supply of hearts, and possibly other organs, to millions of terminally ill people waiting helplessly for a new lease on life.
Approximately 50,000 patients in the United States alone die every year for lack of a donor heart, and some 22 million people worldwide are living with the threat of heart failure.
"The idea would be to develop transplantable blood vessels or whole organs that are made from your own cells," said lead researcher Doris Taylor, director of the Center or Cardiovascular Repair at the University of Minnesota. While there have been advances in generating living heart tissue in the lab, this is the first time an entire, three-dimension bio-artificial heart has been brought to life.
The core procedure making this possible is called decellularisation. In this process, all the cells from an organ -- in this case the heart of a dead rat -- are stripped away using powerful detergents, leaving only a bleached-white scaffolding composed of proteins secreted by the cells. In the experiments, this matrix was then injected with a mixture of cells taken from newborn rat hearts and placed in a sterile lab setting, where the scientists hoped it would grow.
After only four days, contractions started, and on the eighth day, the hearts were pumping, according to the study, published in the British journal Nature Medicine.
The researchers were stunned.
"When we saw the first contractions, we were speechless," said Harald Ott, a surgeon at Massachusetts General Hospital.
"We certainly were surprised that it worked so well and so quickly," Taylor told AFP. "There are so many places this could have gone wrong."
In humans the objective would be to inject stemcells drawn directly from the recipient of the donated organ, thus eliminating the danger that the new heart would be rejected by the immune system.
Recent breakthroughs in stemcell research from non-embryo sources mean that new tissues should be easy to generate, according to the authors. Many patients who might one day benefit from a transplanted bioartificial organ are currently not even listed as potential recipients, said Ott.
"If organs derived from a patient's own cells would become available on a large scale -- maybe even as an off-the-shelf product -- millions of patients suffering from organ failure would benefit," he said in an e-mail.
In these "proof of concept" experiments, the bioartificial rat hearts grown in the lab pumped, after eight days, with a force equivalent to about two percent of an adult rodent heart.
Taylor and her team are now working on making the recycled organs more efficient, and have even transplanted some of these hearts into the abdomens of rats and connected them to the animals' aortas, a standard way of testing whether a donor organ can keep an animal alive.
Decellularisation could change the way scientists thinks about engineering organs, according to the study.
"It opens a door to this notion that you can make any organ: kidney, liver, lung, pancreas -- you name it and we hope we can make it," Taylor said.
Though not reported in this study, the Minnesota researchers have also successfully applied the technique to pig hearts, which are closer to human hearts in size and complexity.
http://afp.google.com/article/ALeqM5jrDcLbJiEj8KXtPaMo_sPrzoUsKQ
-
8
Antarctic is losing ice nearly twice as fast as ten years ago
by kenai inhi all, love this board.
here is something some of you might find interesting:.
http://www.timesonline.co.uk/tol/news/environment/article3181944.ece.
-
-
kenai
Hi Mincan, as much as I hated to face reality I had to change my views on GW and yes you are absolutely right about us being F*$ed up. I've been reading discussions on this board for a while now and I think a big part of the problem in facing up to reality is the baggage we carry from 'doom's day cults' like Witnesses which left us with attitude that is wary of a very notion that catastrophes can befall us all. We forget though what happen to Menoan civilization or Easter island people. It is not god but nature simply balances itself in the end, in process though it can destroy the very way of life we have taken for granted.
-
42
Do you sometimes feel really disconected from people?
by Aphrodite ini thought i had been going really well in my life until my mothers recent attempt at shunning me.
now im feeling like i don't want to connect with anyone.
i'm kind of disconnecting myself from my friends even, withdrawing.
-
-
kenai
I did for a while after leaving, then it hit me that the only reason I felt like that was because deep down inside I was still craving approval from people who were witnesses, including my mom and dad. I had to come with terms that life is life and that there are trade offs that need to be made and consequences accepted. I would lie if I said it was easy at first but later I felt much better and have become a very balanced and responsible adult in process.
-
8
Antarctic is losing ice nearly twice as fast as ten years ago
by kenai inhi all, love this board.
here is something some of you might find interesting:.
http://www.timesonline.co.uk/tol/news/environment/article3181944.ece.
-
-
kenai
Hi all, love this board. Here is something some of you might find interesting:
http://www.timesonline.co.uk/tol/news/environment/article3181944.ece
The rate of annual ice loss in the Antarctic has increased by almost 80 billion tonnes in a decade, a study has found. Measurements using satellite radar readings revealed that in parts of the continent the rate of loss has speeded up by 140 per cent since 1996. Global warming is thought to be among the most likely factors and the data provides one of the most detailed assessments yet of the changes. The findings challenge suggestions from previous research that the overall quantities of ice and snow in Antarctica could increase over the next century because of greater snowfall. The total annual loss was estimated at 196 billion tonnes, almost 50 times as much as the 4 billion tonnes of drinking water supplied to Britain’s taps each year. The most extensive ice loss was found to be taking place in west Antarctica, where an estimated 132 billion tonnes disappeared in 2006. The annual loss increased by about 49 billion tonnes more than in 1996, when about 83 billion tonnes was calculated to have slipped into the water, mainly as icebergs. Related Links
On the Antarctic Peninsula the rate of loss was even greater, though the overall quantities were lower. It was estimated that the amount of ice loss rose from 25 billion to 60 billion tonnes. Quantities of ice and snow disappearing from east Antarctica were thought to be much lower, at 4 billion tonnes each year, and researchers concluded that the rate was unchanged since 1996.
Professor Jonathan Bamber, of the University of Bristol, was part of an international team of scientists that mapped changes in ice cover around 85 per cent of Antarctica’s coast.
“What we have done is make some observations that show a very substantial and dramatic change in the breadth of the ice sheet,” he said. “It suggests changes in the climate system could have a rapid influence on the health of the Antarctic ice sheet.
“This is another observation that confirms the trend in what’s happening around the world. We’ve seen the same thing in mountain glaciers, in Greenland, Patagonia and the same thing in Alaska. We are seeing the same thing everywhere we look.”
He was unable to say for certain that global warming was to blame but the ice loss from Antarctica is thought to be caused by warmer water temperatures, which in turn are caused by climate change and altered ocean currents. The loss is thought to be partly attributable to processes that take place over thousands of years.
“How it reponds to climate takes place over many different time scales,” Professor Bamber said. “There are changes taking place now that are a result of what happened to the climate 12,000 years ago.” Temperature rises caused by climate change are more pronounced at the poles than in other regions of the world but researchers have an incomplete understanding of the mechanisms controlling ice in Antarctica.
Data from the study will help scientists to establish how much ice and snow will be lost over the next century. Loss of ice on Antarctica has the potential to be the biggest cause of rising sea levels in coming decades. If it all melted, which scientists consider highly unlikely by 2100, it is estimated that sea level would rise 61-65 metres, compared with 7 metres if all of Greenland’s glaciers were to melt.
