Communion Of Dreams


Heinlein was right.

Via BoingBoing, an interesting discussion over on Tor.com: The Dystopic Earths of Heinlein’s Juveniles. An excerpt:

It’s funny how it’s overpopulation and political unpleasantness that cause the problems, never ecological disaster. Maybe that wasn’t on the horizon at all in the fifties and early sixties? I suppose every age has its own disaster story. It’s nice how little they worry about nuclear war too, except in Space Cadet which is all nuclear threat, Venusians and pancakes. They don’t make them like that any more. Come to think it’s probably just as well.

* * *
No individual one of these would be particularly noticeable, especially as they’re just background, but sitting here adding them up doesn’t make a pretty picture. What’s with all these dystopias? How is it that we don’t see them that way? Is it really that the message is all about “Earth sucks, better get into space fast”? And if so, is that really a sensible message to be giving young people? Did Heinlein really mean it? And did we really buy into it?

Yeah, he meant it. And further, he was right.

No, I’m not really calling into question the premise of the piece – that Heinlein had something of a bias about population and governmental control. And I’m not saying that he was entirely correct in either his politics or his vision of the future.

But consider the biggest threat facing us: No, not Paris Hilton’s involvement in the presidential election, though a legitimate case can be made that this is indeed an indication of the end of the world. Rather, I mean global warming.

And why do we have global warming? Because of the environmental impact of human civilization. And why is this impact significant? Because of the size of the human population on this planet.

And what is the likely response to the coming changes? Increased governmental control.

[Mild spoilers ahead.]

For Communion of Dreams I killed off a significant portion of the human race as part of the ‘back story’. Why? Well, it served my purposes for the story. But also because I think that one way or another, we need to understand and accept that the size of our population is a major factor in all the other problems we face. Whether it is limitations caused by peak oil or some other resource running out, or the impact of ‘carbon footprints’, or urban sprawl, or food shortages, all of these problems have one common element: population pressure. We have too many people consuming too many resources and generating too much pollution. In fact, when I once again turn my writing the prequel to Communion, I may very well make this connection more explicit, and have the motivation of the people responsible for the fireflu based on this understanding.

So yeah, Heinlein was right. He may not have spelled out the end result (ecological disaster) per se, but he understood the dynamic at work, and what it would lead to. Just because things haven’t gotten as bad as they can get doesn’t mean that we’re not headed that direction. Our technology can only compensate for so long – already we see things breaking down at the margins, and the long term problems are very real. You can call it ‘dystopic’, but I’ll just call it our future.

Jim Downey



Something else?
August 2, 2008, 8:28 am
Filed under: Bad Astronomy, Daily Kos, Mars, NASA, Phil Plait, Predictions, Press, Science, Space, Universe Today

You undoubtedly heard that the Phoenix Mars Lander this week confirmed the existence of water ice at the location of the lander. News, yes, but as others have noted, scientists have had little doubt that there was water ice on Mars for quite some time.

However . . .

. . . what if there’s something else going on that will be much more interesting news?

The White House is Briefed: Phoenix About to Announce “Potential For Life” on Mars

It would appear that the US President has been briefed by Phoenix scientists about the discovery of something more “provocative” than the discovery of water existing on the Martian surface. This news comes just as the Thermal and Evolved Gas Analyzer (TEGA) confirmed experimental evidence for the existence of water in the Mars regolith on Thursday. Whilst NASA scientists are not claiming that life once existed on the Red Planet’s surface, new data appears to indicate the “potential for life” more conclusively than the TEGA water results. Apparently these new results are being kept under wraps until further, more detailed analysis can be carried out, but we are assured that this announcement will be huge

So why is there all this secrecy? According to scientists in communication with Aviation Week & Space Technology, the next big discovery will need to be mulled over for a while before it is announced to the world. In fact, the Jet Propulsion Laboratory science team for the MECA wet-chemistry instrument that made these undisclosed findings were kept out of the July 31st news conference (confirming water) so additional analysis could be carried out, avoiding any questions that may have revealed their preliminary results. They have also made the decision to discuss the results with the Bush Administration’s Presidential Science Advisor’s office before a press conference between mid-August and early September.

And from the Aviation Week article:

White House Briefed On Potential For Mars Life

The White House has been alerted by NASA about plans to make an announcement soon on major new Phoenix lander discoveries concerning the “potential for life” on Mars, scientists tell Aviation Week & Space Technology.

Sources say the new data do not indicate the discovery of existing or past life on Mars. Rather the data relate to habitability–the “potential” for Mars to support life–at the Phoenix arctic landing site, sources say.

The data are much more complex than results related NASA’s July 31 announcement that Phoenix has confirmed the presence of water ice at the site.

I can understand the desire to be much more certain of their results before making an official announcement. Remember the debacle of the Martian Meteorite which purportedly contained evidence of fossilized bacteria? That debate is *still* going on, in large part because there are legitimate questions of how to understand the data. No one at NASA, or JPL, or anywhere else is going to want to overstate the results this time around.

So, is there life on Mars? Maybe. I’d guess likely, given all that we know about the planet. But it costs me nothing to make such a statement – scientists with reputations on the line are understandably going to be much more careful in making that case. So, let’s wait and see what the evidence shows.

Jim Downey

(Cross posted to Daily Kos.)



For no reason at all.

In May, Bruce Schneier wrote this:

Crossing Borders with Laptops and PDAs

Last month a US court ruled that border agents can search your laptop, or any other electronic device, when you’re entering the country. They can take your computer and download its entire contents, or keep it for several days. Customs and Border Patrol has not published any rules regarding this practice, and I and others have written a letter to Congress urging it to investigate and regulate this practice.

Well, we now know the response:

Travelers’ Laptops May Be Detained At Border
No Suspicion Required Under DHS Policies

Federal agents may take a traveler’s laptop computer or other electronic device to an off-site location for an unspecified period of time without any suspicion of wrongdoing, as part of border search policies the Department of Homeland Security recently disclosed.

Also, officials may share copies of the laptop’s contents with other agencies and private entities for language translation, data decryption or other reasons, according to the policies, dated July 16 and issued by two DHS agencies, U.S. Customs and Border Protection and U.S. Immigration and Customs Enforcement.

Basically, they can take any electronic or other device capable of storing data for as long as they want, for no reason at all. Yes, I said “other device”. From the Washington Post article cited above:

The policies cover “any device capable of storing information in digital or analog form,” including hard drives, flash drives, cellphones, iPods, pagers, beepers, and video and audio tapes. They also cover “all papers and other written documentation,” including books, pamphlets and “written materials commonly referred to as ‘pocket trash’ or ‘pocket litter.’ “

Think about that for just a moment. They have to right to take anything of yours which could contain data, and keep it for as long as they think they need it. Furthermore, they can share it with others as they see fit. Will the data be secure? Will it be destroyed if not needed? Will your laptop (etc) be returned to you unmolested and intact, or will it have some spyware installed to record your keystrokes? (This last item plays a pivotal plot point in Communion of Dreams, so I tend to think of such things).

What to do?

Accept that the authorities will do this, and not worry about it? Don’t cross the boarder? Try and hide your data? Simply don’t take any such devices with you?

We’re going to Patagonia in about 10 weeks. My wife has been considering taking her laptop, since she is part of the organizing team for the tour we’ll be on. I told her that I don’t recommend it. But it’s her call. At the very least, I hope that she – and anyone else who has to do this – will take the time to consider Schneier’s advice on how to do so safely. Here’s a bit:

So your best defence is to clean up your laptop. A customs agent can’t read what you don’t have. You don’t need five years’ worth of email and client data. You don’t need your old love letters and those photos (you know the ones I’m talking about). Delete everything you don’t absolutely need. And use a secure file erasure program to do it. While you’re at it, delete your browser’s cookies, cache and browsing history. It’s nobody’s business what websites you’ve visited. And turn your computer off – don’t just put it to sleep – before you go through customs; that deletes other things. Think of all this as the last thing to do before you stow your electronic devices for landing. Some companies now give their employees forensically clean laptops for travel, and have them download any sensitive data over a virtual private network once they’ve entered the country. They send any work back the same way, and delete everything again before crossing the border to go home. This is a good idea if you can do it.

If you can’t, consider putting your sensitive data on a USB drive or even a camera memory card: even 16GB cards are reasonably priced these days. Encrypt it, of course, because it’s easy to lose something that small. Slip it in your pocket, and it’s likely to remain unnoticed even if the customs agent pokes through your laptop. If someone does discover it, you can try saying: “I don’t know what’s on there. My boss told me to give it to the head of the New York office.” If you’ve chosen a strong encryption password, you won’t care if he confiscates it.

There’s also advice (and links) in that essay on how to partition your hard drive to include hidden material, how to encrypt your data safely, and so forth. Use according to how valuable your data is. But keep in mind that showing up at the boarder (or Customs) with such encryption evident is a sure way to attract attention and make your day more difficult. Not fun.

What I find astonishing, and extremely insightful, is this quote from that WaPo piece:

Homeland Security Secretary Michael Chertoff wrote in an opinion piece published last month in USA Today that “the most dangerous contraband is often contained in laptop computers or other electronic devices.” Searches have uncovered “violent jihadist materials” as well as images of child pornography, he wrote.

With about 400 million travelers entering the country each year, “as a practical matter, travelers only go to secondary [for a more thorough examination] when there is some level of suspicion,” Chertoff wrote. “Yet legislation locking in a particular standard for searches would have a dangerous, chilling effect as officers’ often split-second assessments are second-guessed.”

A “chilling effect”, Mr. Chertoff? Funny, that term is more commonly used and understood in how government can infringe on the civil rights of law-abiding Americans. To make the claim that the government’s agents are the ones suffering such an infringement in their duties is to turn the entire notion of governmental authority coming *from* the people on its head, and says rather that those public employees are something more akin to our rulers than servants.

But I suppose that this is hardly surprising in this day and age.

Jim Downey

(Cross posted to UTI. Also see further discussion at MetaFilter, Daily Kos, and BoingBoing.)



OK, so it isn’t exactly The Rocketeer . . .

. . . but the announcement that there is a functional personal flying device to be revealed today is still pretty cool.

Why do I call it a ‘personal flying device’?  Because it isn’t really a classic ‘jetpack‘ as we’ve seen in plenty of cartoons and movies.  It is a large beast, weighing about 250 pounds, with twin fans each the size of a garbage can cut about in half.  And for safety purposes, there is a support frame which allows the pilot to climb under the thing and strap himself to it.  Hardly the ‘engine’ of The Rocketeer.  But all in all, not a bad start – this is functional, will fly for about 30 minutes (the longest classic jetpack such as James Bond flew could go for about 30 seconds), and is fairly stable.  From here significant improvements will be made.  And Glenn Martin, the inventor of the device, understands this:

Only 12 people have flown the jetpack, and no one has gained more than three hours of experience in the air. Mr. Martin plans to take it up to 500 feet within six months. This time, he said with a smile, he will be the first.

Mr. Martin said he had no idea how his invention might ultimately be used, but he is not a man of small hopes. He repeated the story of Benjamin Franklin, on first seeing a hot-air balloon, being asked, “What good is it?” He answered, “What good is a newborn baby?”

Exactly.

Jim Downey



Stress? What Stress?

Some years back a good friend sent me a postcard from Florida with the image of a tri-colored heron’s head (you can see the image from which the card came here). On the card, the heron is looking straight at you, top feathers standing straight up, and above it in bright blue ‘electric’ lettering are the words “Stress? What Stress?”

It’s been tacked to the wall next to my desk here since. And it has been something of a standing joke between my wife and I. When things have gotten bad from time to time, one of us will turn to the other and simply say in a squeaky, high pitched voice “Stress? What Stress?”

* * * * * * *

A month ago I wrote about slowly coming down from the prolonged adrenalin high which was being a full time care provider. Doctors have known for a while that such long term stress was hard on care providers. It’ll drive up blood pressure, screw with your sleep habits, and even compromise your immune system. Now they have started to figure out how that immune system mechanism works. Last night I caught a piece on NPR’s All Things Considered with UCLA professor Rita Effros about her research on this mechanism. What professor Effros said (no transcript yet, so this excerpt is my transcription):

So, in the short term cortisol does a lot of really good things. The problem is, if cortisol stays high in your bloodstream for long periods of time, all those things that got shut down short term stay shut down. For example, your immune system.

But let’s say you were taking care of an Alzheimer’s spouse, or a chronically ill child – those kinds of situations are known now to cause chronic, really long-term stress – let’s say years of stress.

(These care providers) were found to have a funny thing happening in their white blood cells. A certain part of the cell is called the telomere, which is a kind of a clock which keeps track of how hard the cell has been working. Their telomeres got shorter and shorter, and it has been known for many years that when cells have very short telomeres they don’t function the way they’re supposed to function.

What happens is this: cortisol inhibits the production of telomerase – a protein which helps to lengthen and buffer aging effects. Abstract on the mechanism is here, and it says it succinctly:

BACKGROUND:
Every cell contains a tiny clock called a telomere, which shortens each time the cell divides. Short telomeres are linked to a range of human diseases, including HIV, osteoporosis, heart disease and aging. Previous studies show that an enzyme within the cell, called telomerase, keeps immune cells young by preserving their telomere length and ability to continue dividing.

FINDINGS:
UCLA scientists found that the stress hormone cortisol suppresses immune cells’ ability to activate their telomerase. This may explain why the cells of persons under chronic stress have shorter telomeres.

IMPACT:
The study reveals how stress makes people more susceptible to illness. The findings also suggest a potential drug target for preventing damage to the immune systems of persons who are under long-term stress, such as caregivers to chronically ill family members, as well as astronauts, soldiers, air traffic controllers and people who drive long daily commutes.

* * * * * * *

io9 picked up on this story, and gave it a nice Science Fiction spin:

Stress runs down the body’s immune system, which is why people with high-stress jobs or events in their lives are vulnerable to illness. Now a researcher at UCLA has discovered the link between emotional stress and physical damage — and she’s going to develop a pill that will allow you to endure stress without the nasty side-effects. And there may also be one good side-effect: Extreme longevity.

It turns out that when you’re under stress, your body releases more of the hormone cortisol, which stimulates that hyper-alert “fight or flight” reflex. While cortisol is good in small doses, over time it erodes the small caps at the end of your chromosomes known as telomeres (the little yellow dots at the end of those blue chromosomes in the picture). Many researchers have long suspected that telomeres would provide a key to longevity because they are quite large in young people and gradually shrink over time as cells divide.

Rita Effros, the researcher who led the UCLA study, believes that she can synthesize a pill that combats stress by putting more telomerase — the substance that builds telomeres — into the body. This would keep those telomeres large, even in the face of large amounts of cortisol. It might also make your body live a lot longer too.

[Spoiler alert!]

Curiously, this clue about telomere length and aging is exactly the mechanism I use in Communion of Dreams to reveal that the character Chu Ling is a clone. Genetic testing reveals that the telomeres in her cells are much shorter than would be expected from a child her age, leading to the understanding that this is due to the fact that she has been cloned.

Ironic, eh? No, no one is going to think that I’m a clone. But I find it curious that the same mechanism which I chose for a major plot point pertaining to the health of the human race in my book is one which has been clearly operating on my own health.

Fascinating.

Jim Downey



“Doom, DOOM, I say!!”

A good friend sent me a link to a longish piece in the latest edition of The Atlantic titled Is Google Making Us Stupid? by author Nicholas Carr. It’s interesting, and touches on several of the things I explore as future technologies in Communion of Dreams, and I would urge you to go read the whole thing.

Read it, but don’t believe it for a moment.

OK, Carr starts out with the basic premise that the human mind is a remarkably plastic organ, and is capable of reordering itself to a large degree even well into adulthood. Fine. Obvious. Anyone who has learned a new language, or mastered a new computer game, or acquired any other skill as an adult knows this, and knows how it expands one’s awareness of different and previously unperceived aspects of reality. That, actually, is one of the basic premises behind what I do with Communion, in opening up the human understanding of what the reality of the universe actually is (and how that is in contrast with our prejudices of what it is).

From this premise, Carr speculates that the increasing penetration of the internet into our intellectual lives is changing how we think. I cannot disagree, and have said as much in several of my posts here. For about 2/3 of the article he is discussing how the hyperlinked reality of the web tends to scatter our attention, making it more difficult for us to concentrate and think (or read) ‘deeply’. Anyone who has spent a lot of time reading online knows this phenomenon – pick up an old-fashioned paper book, and you’ll likely find yourself now and again wanting explanatory hyperlinks on this point or that for further clarification. This, admittedly, makes it more difficult to concentrate and immerse yourself into the text at hand, to lose yourself in either the author’s argument or the world they are creating.

But then Carr hits his main point, having established his premises. And it is this: that somehow this scattered attention turns us into information zombies, spoon-fed by the incipient AI of the Google search engine.

Huh?

No, seriously, that’s what he says. Going back to the time-motion efficiency studies pioneered by Frederick Winslow Taylor at the turn of the last century, which turned factory workers into ideal components for working with machines, he makes this argument:

Taylor’s system is still very much with us; it remains the ethic of industrial manufacturing. And now, thanks to the growing power that computer engineers and software coders wield over our intellectual lives, Taylor’s ethic is beginning to govern the realm of the mind as well. The Internet is a machine designed for the efficient and automated collection, transmission, and manipulation of information, and its legions of programmers are intent on finding the “one best method”—the perfect algorithm—to carry out every mental movement of what we’ve come to describe as “knowledge work.”

Google’s headquarters, in Mountain View, California—the Googleplex—is the Internet’s high church, and the religion practiced inside its walls is Taylorism. Google, says its chief executive, Eric Schmidt, is “a company that’s founded around the science of measurement,” and it is striving to “systematize everything” it does. Drawing on the terabytes of behavioral data it collects through its search engine and other sites, it carries out thousands of experiments a day, according to the Harvard Business Review, and it uses the results to refine the algorithms that increasingly control how people find information and extract meaning from it. What Taylor did for the work of the hand, Google is doing for the work of the mind.

The company has declared that its mission is “to organize the world’s information and make it universally accessible and useful.” It seeks to develop “the perfect search engine,” which it defines as something that “understands exactly what you mean and gives you back exactly what you want.” In Google’s view, information is a kind of commodity, a utilitarian resource that can be mined and processed with industrial efficiency. The more pieces of information we can “access” and the faster we can extract their gist, the more productive we become as thinkers.

Where does it end? Sergey Brin and Larry Page, the gifted young men who founded Google while pursuing doctoral degrees in computer science at Stanford, speak frequently of their desire to turn their search engine into an artificial intelligence, a HAL-like machine that might be connected directly to our brains. “The ultimate search engine is something as smart as people—or smarter,” Page said in a speech a few years back. “For us, working on search is a way to work on artificial intelligence.” In a 2004 interview with Newsweek, Brin said, “Certainly if you had all the world’s information directly attached to your brain, or an artificial brain that was smarter than your brain, you’d be better off.” Last year, Page told a convention of scientists that Google is “really trying to build artificial intelligence and to do it on a large scale.”

Such an ambition is a natural one, even an admirable one, for a pair of math whizzes with vast quantities of cash at their disposal and a small army of computer scientists in their employ. A fundamentally scientific enterprise, Google is motivated by a desire to use technology, in Eric Schmidt’s words, “to solve problems that have never been solved before,” and artificial intelligence is the hardest problem out there. Why wouldn’t Brin and Page want to be the ones to crack it?

Still, their easy assumption that we’d all “be better off” if our brains were supplemented, or even replaced, by an artificial intelligence is unsettling. It suggests a belief that intelligence is the output of a mechanical process, a series of discrete steps that can be isolated, measured, and optimized. In Google’s world, the world we enter when we go online, there’s little place for the fuzziness of contemplation. Ambiguity is not an opening for insight but a bug to be fixed. The human brain is just an outdated computer that needs a faster processor and a bigger hard drive.

Do you see the pivot there? He’s just spent over a score of paragraphs explaining how the internet has degraded our ability to concentrate because of hyperlinked distractions, but then he turns around and says that Google’s increasing sophistication at seeking out information will limit our curiosity about that information.

No. If anything, the ability to access a broader selection of possible references quickly, the ability to see a wider scope of data, will allow us to better use our human ability to understand patterns intuitively, and to delve down into the data pile to extract supporting or contradicting information. This will *feed* our curiosity, not limit it. More information will be hyperlinked – more jumps hither and yon for our minds to explore.

The mistake Carr has made is to use the wrong model for his analogy. He has tried to equate the knowledge economy with the industrial economy. Sure, there are forces at play which push us in the direction he sees – any business is going to want its workers to concentrate on the task at hand, and be efficient about it. That’s what the industrial revolution was all about, from a sociological point of view. This is why some employers will limit ‘surfing’ time, and push their workers to focus on managing a database, keeping accounts balanced, and monitoring production quality. While they are at work. But that has little or nothing to do with what people do on their own time, and how the use the tools created by information technology which allow for much greater exploration and curiosity. And for those employees who are not just an extension of some automated process, those who write, or teach, or research – these tools are a godsend.

In fairness, Carr recognizes the weakness in his argument. He acknowledges that previous technological innovations on a par with the internet (first writing itself, then the development of the printing press) were initially met with gloom on the part of those who thought that it would allow for the human mind to become lazy by not needing to hold all the information needed within the brain itself. These predictions of doom proved wrong, of course, because while some discipline in holding facts in the brain was lost, increasing freedom with accessing information needed only fleetingly was a great boon, allowing people to turn their intellectual abilities to using those facts rather than just remembering them.

Carr ends his essay with this:

I’m haunted by that scene in 2001. What makes it so poignant, and so weird, is the computer’s emotional response to the disassembly of its mind: its despair as one circuit after another goes dark, its childlike pleading with the astronaut—“I can feel it. I can feel it. I’m afraid”—and its final reversion to what can only be called a state of innocence. HAL’s outpouring of feeling contrasts with the emotionlessness that characterizes the human figures in the film, who go about their business with an almost robotic efficiency. Their thoughts and actions feel scripted, as if they’re following the steps of an algorithm. In the world of 2001, people have become so machinelike that the most human character turns out to be a machine. That’s the essence of Kubrick’s dark prophecy: as we come to rely on computers to mediate our understanding of the world, it is our own intelligence that flattens into artificial intelligence.

Wrong. Wrong, wrong, wrong. This is a complete misreading of what happens in the movie. Kubrick’s vision was exactly the opposite – HAL was quite literally just following orders. Those orders were to preserve the secret nature of the mission, at the expense of the lives of the crew whom he murders or attempts to murder. That is the danger in allowing machinelike behaviour to be determinant. Kubrick (and Arthur C. Clarke) were, rather, showing that it is the human ability to assess unforeseen situations and synthesize information to draw a new conclusion (and act on it) which is our real strength.

*Sigh*

Jim Downey

(Hat tip to Wendy for the link to the Carr essay!)



9.35% Return.
July 19, 2008, 1:28 pm
Filed under: Humor, Marketing, Predictions, Promotion, Publishing, Science Fiction

Last Friday we crossed 10,000 downloads of Communion of Dreams.  By Monday we had another 500 downloads.   By this morning it was another 435.  That’s 935 downloads in a week.  Or, put it another way, that’s a 9.35% increase.  Sorta like a return on investment.  Let’s see . . . a simple interest calculation . . . 10,000 (base) x 0.0935 (% increase) x 52 (weeks per year) . . . in one year, another 48,620 people will have downloaded Communion at this rate.  Of course, if we *compound* the increase (saying that we’ll not have 935 downloads each week, but rather a 9.35% increase each week) then that results in over a million downloads (check it yourself).

Woo-hoo!  Time to get a publisher – who wouldn’t want a million-seller book?

Big-time, here I come!

Jim Downey



Did you remember?

Yesterday was an anniversaryHere are some stunning pictures related to itThere have been movies made about itAnd movies about what it meantOr what it could lead toAnd, of course, there are a whole bunch of books on related subjectsI’ve talked about the threat it presentsLore about it has widely influenced popular cultureAnd it is still topical.

Did you mix a drink to celebrate?

Jim Downey



Orange windows?
July 16, 2008, 7:17 am
Filed under: MetaFilter, MIT, Predictions, Science, tech

Currently, there are two fundamental problems with solar power:

1. Manufacturing. Photovoltaics are difficult and expensive to manufacture, with exacting quality standards. Minor imperfections can ruin the electrical circuit of a cell or even a whole panel of cells.

2. Efficiency. To get maximum efficiency from solar panels, they should be mounted so as to be optimally oriented towards the sun. Ideally, they would track the sun across the sky during the course of the day, and account for seasonal variation in the sun’s path. Such tracking mechanisms are expensive to build and maintain.

Well, researchers at MIT seem to have come up with a simple way of addressing both problems.

MIT opens new ‘window’ on solar energy

Cost effective devices expected on market soon

Imagine windows that not only provide a clear view and illuminate rooms, but also use sunlight to efficiently help power the building they are part of. MIT engineers report a new approach to harnessing the sun’s energy that could allow just that.

The work, to be reported in the July 11 issue of Science, involves the creation of a novel “solar concentrator.” “Light is collected over a large area [like a window] and gathered, or concentrated, at the edges,” explains Marc A. Baldo, leader of the work and the Esther and Harold E. Edgerton Career Development Associate Professor of Electrical Engineering.

As a result, rather than covering a roof with expensive solar cells (the semiconductor devices that transform sunlight into electricity), the cells only need to be around the edges of a flat glass panel. In addition, the focused light increases the electrical power obtained from each solar cell “by a factor of over 40,” Baldo says.

(Video here.)

What they have done is to solve a basic problem with using a flat pane of glass to concentrate light around the edges of the pane, thanks to research done on lasers and LEDs. The difficulty with this approach in the past was that light energy would be ‘lost’ in passing through the glass, making such a system inefficient. But Baldo and his fellow researchers discovered that a simple application of dye or paint – they literally used orange automotive paint – on the surface of the glass did the trick. The light is absorbed by the color on the surface, then re-emitted within the pane at a particular wavelength which passes easily through the glass matrix to the edges of the pane.

This innovation is exciting for several reasons. First off, it is fairly cheap to apply such a dye to the surface of the glass, and it really doesn’t matter if there are imperfections – they’ll just disrupt the light absorption at that point, not interfere with the functioning of the photovoltaic cells. Secondly, it eliminates the need for elaborate tracking systems – any light which hits the glass is concentrated at the edges of the pane. So all you need to do is rim the edges of the glass with photovoltaic cells, and you maximize your energy gain.

A side benefit will be that the application of this technology to large buildings will generate electricity while at the same time reducing the heat load from solar radiation through windows. Say you make your windows such that they allow 25% of the light striking them to enter the building, the rest being captured for electricity generation (this can be done by controlling the amount of dye on the surface of the glass – such as is done today with tinted windows). That 25% is still plenty sufficient to help with natural illumination, but means that you won’t need to run air conditioning systems nearly as much to offset the heat load. (I just picked 25% at random – I think that the actual amount needed for illumination would be less – architects and engineers would be be able to factor this into any building’s design specs).

Of course, it could well mean that windows in our near-term future show up as being orange. Maybe I’ll need to drop such descriptions into Communion of Dreams next time I do some editing . . .

Jim Downey

(Via MeFi.)



People Are Strange*
July 14, 2008, 9:50 am
Filed under: Feedback, Marketing, Music, Predictions, Promotion, Publishing, Science Fiction, Society

Well, as I noted the other day, we crossed the threshold of 10,000 downloads of Communion of Dreams sometime last Friday.  This after a bit of a slow crawl the last couple of months to reach that number.

Of course, what happens this weekend?  Another 500 downloads.

Because, clearly, 9,775 downloads doesn’t indicate that something is popular.  But 10,000 does, and so other people want to check it out.

Man, I love marketing.  We hairless apes sure have some funny quirks.

But thanks to all those who decided to check out the book this weekend.  And, again, thanks to all who downloaded it previously and helped to spread the word about it.

Jim Downey

*with apologies.




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