Tag Archives: power

New Solar Energy Conversion Process Could Revamp Solar Power Production

A new process that simultaneously combines the light and heat of solar radiation to generate electricity could offer more than double the efficiency of existing solar cell technology, say the Stanford engineers who discovered it and proved that it works. The process, called “photon enhanced thermionic emission,” or PETE, could reduce the costs of solar energy production enough for it to compete with oil as an energy source. Stanford engineers have figured out how to simultaneously use the light and heat of the sun to generate electricity in a way that could make solar power production more than twice as efficient as existing methods and potentially cheap enough to compete with oil. Unlike photovoltaic technology currently used in solar panels – which becomes less efficient as the temperature rises – the new process excels at higher temperatures. Called “photon enhanced thermionic emission,” or PETE, the process promises to surpass the efficiency of existing photovoltaic and thermal conversion technologies. “This is really a conceptual breakthrough, a new energy conversion process, not just a new material or a slightly different tweak,” said Nick Melosh, an assistant professor of materials science and engineering, who led the research group. “It is actually something fundamentally different about how you can harvest energy.” And the materials needed to build a device to make the process work are cheap and easily available, meaning the power that comes from it will be affordable. Melosh is senior author of a paper describing the tests the researchers conducted. It was published online Aug. 1 in Nature Materials. “Just demonstrating that the process worked was a big deal,” Melosh said. “And we showed this physical mechanism does exist; it works as advertised.” Most photovoltaic cells, such as those used in rooftop solar panels, use the semiconducting material silicon to convert the energy from photons of light to electricity. But the cells can only use a portion of the light spectrum, with the rest just generating heat. This heat from unused sunlight and inefficiencies in the cells themselves account for a loss of more than 50 percent of the initial solar energy reaching the cell. If this wasted heat energy could somehow be harvested, solar cells could be much more efficient. The problem has been that high temperatures are necessary to power heat-based conversion systems, yet solar cell efficiency rapidly decreases at higher temperatures. Until now, no one had come up with a way to wed thermal and solar cell conversion technologies. Melosh's group figured out that by coating a piece of semiconducting material with a thin layer of the metal cesium, it made the material able to use both light and heat to generate electricity. “What we've demonstrated is a new physical process that is not based on standard photovoltaic mechanisms, but can give you a photovoltaic-like response at very high temperatures,” Melosh said. “In fact, it works better at higher temperatures. The higher the better.” While most silicon solar cells have been rendered inert by the time the temperature reaches 100 degrees Celsius, the PETE device doesn't hit peak efficiency until it is well over 200 C. Because PETE performs best at temperatures well in excess of what a rooftop solar panel would reach, the devices will work best in solar concentrators such as parabolic dishes, which can get as hot as 800 C. Dishes are used in large solar farms similar to those proposed for the Mojave Desert in Southern California and usually include a thermal conversion mechanism as part of their design, which offers another opportunity for PETE to help generate electricity as well as minimize costs by meshing with existing technology. “The light would come in and hit our PETE device first, where we would take advantage of both the incident light and the heat that it produces, and then we would dump the waste heat to their existing thermal conversion systems,” Melosh said. “So the PETE process has two really big benefits in energy production over normal technology.” Photovoltaic systems never get hot enough for their waste heat to be useful in thermal energy conversion, but the high temperatures at which PETE performs are perfect for generating usable high-temperature waste heat. Melosh calculates the PETE process can get to 50 percent efficiency or more under solar concentration, but if combined with a thermal conversion cycle, could reach 55 or even 60 percent – almost triple the efficiency of existing systems. The team would like to design the devices so they could be easily bolted on to existing systems, thereby making conversion relatively inexpensive. added by: JanforGore

TIME’s Epic Distortion of Plight of Afghan Women

Tomorrow, TIME Magazine will treat newsstand customers everywhere to one of the most rank propaganda plays of the Afghanistan War. The cover features a woman, Aisha, whose face was mutilated by the Taliban, next to the headline, “What Happens If We Leave Afghanistan.” Far more people will see this image and have their emotions manipulated by it than will read the article within (which itself seems to be a journalistic travesty, if the web version is any indication), so TIME should be absolutely ashamed of themselves for such a dishonest snow job on their customers. Readers deserve better. Let’s clarify something right off the top when it comes to this cover: Aisha, the poor woman depicted in the photograph, was attacked last year, with tens of thousands of U.S. troops tramping all over the country at the time. This isn’t the picture of some as-yet-unrealized nighmarish future for Afghan women. It’s the picture of the present. Human Rights Watch’s (HRW) recently published report on this issue, The “Ten-Dollar Talib” and Women’s Rights, provides key context for the struggle for women’s political equality in Afghanistan: Afghan women assert their rights in what is already a deeply hostile political environment. Any assessment of women’s rights, and indeed the prospects for long-term peace and reconciliation needs to be made in the context of the very traditional and often misogynistic male leadership that dominates Afghan politics. The Afghan government, often with the tacit approval of key foreign governments and inter-governmental bodies, has empowered current and former warlords, providing official positions to some and effective immunity from prosecution for serious crimes to the rest. Backroom deals with abusive commanders have created powerful factions in the government and Parliament that are opposed to many of the rights and freedoms that women now enjoy. As one activist told us, “We women don’t have guns and poppies and we are not warlords, therefore we are not in the decision-making processes.” This is something that folks who put together TIME’s cover better understand right now: the fox is already in the hen-house. There is a very powerful set of anti-women’s-equality caucuses already nested within the Afghan government that the U.S. supports. These individuals and groups are working to reassert the official misogyny of the Taliban days already, independent of the reconciliation and reintegration process. Given the opportunity, these individuals and groups in the U.S.-backed government will manipulate the reconciliation and reintegration process and leverage armed-opposition-group participation in the process to push through policies they’d prefer already as compromises with their “opponents.” This is why the propaganda of TIME’s cover is so pernicious: the women of Afghanistan are caught in a vice already, stuck between their opponents in the insurgency and in the Government of the Islamic Republic of Afghanistan. If one is concerned about the rights of women in Afghanistan, the question is, how do we give women the most leverage possible in this situation? Further, TIME’s incendiary headline, “What Happens If We Leave Afghanistan,” is a total misrepresentation of the issue discussed in the article. Here’s Aisha in her own words: “They [the Taliban] are the people that did this to me,” she says, touching her damaged face. “How can we reconcile with them?” Here’s another quote from another woman that gets at the issue much better than TIME’s headline: “Women’s rights must not be the sacrifice by which peace is achieved,” says parliamentarian Fawzia Koofi. And another quote: “When we talk about women’s rights,” Jamalzadah says, “we are talking about things that are important to men as well — men who want to see Afghanistan move forward. If you sacrifice women to make peace, you are also sacrificing the men who support them and abandoning the country to the fundamentalists that caused all the problems in the first place.” If we are to believe the setup on the cover and in the article, the women of Afghanistan see two options: the U.S. can “stay” and ensure the rights of women, or we can “leave” by route of selling them out. But that’s neither what the women’s quotes say nor what Human Rights Watch found when they interviewed 90 “working women and women in public life living in areas that the insurgents effectively controlled or where they have a significant presence to illustrate the current nature of the insurgency.” While they found an intense anxiety over the consequences of the Taliban regaining a share of national power, they also found that: “All of the women interviewed for this report supported a negotiated end to the conflict.” The quotes of the women in TIME’s article express anxiety about the Kabul government negotiated away women’s rights to warlord war criminals, not us “staying” or “leaving.” See what TIME did there? They’ve taken these quotes from Afghan women and manipulated them to portray a false dilemma. TIME Magazine throws out this useless bromide: “For Afghanistan’s women, an early withdrawal of international forces could be disastrous.” Early compared to what? How can a pull-out almost a decade into a conflict be remotely described as “early?” Even if we build a shining utopia for women while U.S. troops were there in large numbers, women’s rights would evaporate the day after we departed if U.S. troops were the force holding them in place. That’s what Afghan Women’s Network’s Orzala Ashraf meant when she told Rethink Afghanistan that, “I don’t believe and I don’t expect any outside power to come and liberate me. If I cannot liberate myself, no one from outside can liberate me.” The struggle is the liberation as Afghan women discover and use their power. Grassroots involvement in social struggle is what creates societies rooted in democratic values, not men with guns from other countries. Although you wouldn’t know it from TIME’s editorializing within the article or from the horrendously misleading cover, the issue is not even remotely “if” we leave Afghanistan. We will. The questions are “When?” and “How?” added by: pinkpanther

Today Show Invites on Rolling Stone Reporter to Complain About Pentagon Ban

NBC’s Today show invited on the reporter, whose Rolling Stone article essentially got General Stanley McChrystal fired, on Thursday’s show to complain that the Pentagon denied him an embed because the war in Afghanistan isn’t going well. After Today co-anchor Meredith Vieira questioned Michael Hastings for his explanation as to why the Pentagon denied him an embed, Hastings concluded “This is a symptom of essentially the war, and how the war is going…The war has hit its all-time low.” This caused Vieira, herself, to cry censorship, as she asked: “Do you think the military is trying to say to reporters,’We will stifle you, if you don’t tell the story the way we want it told?'” MEREDITH VIEIRA: So why do you think, ultimately, you lost this, this right to an embed? I mean, what do you think is going on? Is it the McChrystal article or is there something much bigger than that? MICHAEL HASTINGS: I think it’s, I think it’s much bigger. This is not just about a Rolling Stone reporter being banned from an embed. This is a symptom of essentially the war, and how the war is going. June and July were the deadliest months that we’ve ever seen in the war in Afghanistan. The war has hit its all-time low in approval ratings, so clearly there’s great concern in Washington about how the war is going, and the response to this embed. The response to me on this embed sort of indicates that. I think it’s important to, to just let you know, with this helicopter story, these are stories that I’m very passionate about telling. And it is a great privilege to tell the story of the troops. VIEIRA: But do you think, but do you think the military is trying to say to reporters, “We will stifle you, if you don’t tell the story the way we want it told?” The following Jim Miklaszewski set-up piece and entire interview with Hastings were aired on the August 5 Today show: MEREDITH VIEIRA: And now to the war in Afghanistan. It has been a difficult summer for U.S. troops there. July was the deadliest month yet for Americans. And a new commander took over after a controversial Rolling Stone article led to the end of General Stanley McChrystal’s military career. Well now the Pentagon is refusing to let that reporter, the reporter who wrote it, embed with another unit in Afghanistan. We’re gonna talk about that with Michael Hastings in a moment. But first NBC’s Jim Miklaszewski is at the Pentagon. Mik, good morning to you. [On screen headline: “Pentagon Payback? McChrystal Reporter Not Allowed Back With Troops”] JIM MIKLASZEWSKI: Good morning, Meredith. It’s been a couple of months since the story broke that forced General McChrystal out of the Army, but the fallout over media military relations is far from over. On his last day as a soldier, General Stan McChrystal managed to joke about the article that ended his career, with a word of warning to his fellow soldiers. GEN. STANLEY MCCHRYSTAL: I have stories on all of you, photos on many, and I know a Rolling Stone reporter. MIKLASZEWSKI: That reporter is Michael Hastings. In an interview on Today in June, Hastings explained how he landed that Rolling Stone scoop. MICHAEL HASTINGS: The access I got was almost a throwback to the old days of “fly on the wall” reporting, where, nowadays, access is almost so controlled, it’s always very so controlled. So it was very rare to get this kind of access anyway. MIKLASZEWSKI: But not any more. The U.S. military has revoked Hastings’ recent request to embed with American forces in Afghanistan, after first granting the request last month. Pentagon spokesman Colonel David Lepenn insists it’s not retribution but explains “a key element of an embed is having trust,” and essentially commanders in Afghanistan no longer trust Hastings. But as a freelancer, Hastings has covered the wars in Iraq and Afghanistan for various publications, and Internet news blogs with no apparent complaints. Military officials have, in fact, praised Hastings’ upcoming piece in the Men’s Journal on Army combat helicopters saying “It accurately portrays the Army’s warrior mentality.” So what is going on here? Media watchdogs claim the military is striking back. LUCY DALGLISH, THE REPORTERS COMMITTEE FOR FREEDOM OF THE PRESS: Since they have all of the power, all of it, once he’s published his story they have, if he wants back in, they have all of the power. If they say they don’t trust him to do what they want him to do anymore, they’re just not going to play in the sandbox with him anymore. MIKLASZEWSKI: Meanwhile, the Army Inspector General is still investigating whether if any of McChrystal’s aides who were blindly quoted in that article should face disciplinary action. And as a reporter who’s often been embedded with the military, there is, indeed, a fine line between trust and control. And while the military can control a reporter’s access, there must be no control over the reporter’s content. Meredith? MEREDITH VIEIRA: Mik, thank you very much. Michael Hastings is with us, exclusively. Good morning to you. MICHAEL HASTINGS: Good morning, thanks for having me. VIEIRA: Not at all. Just so people are clear on this, you were offered this embed in June, then the article on General McChrystal comes out at the end of June, between then and now you didn’t hear anything, and then you get this letter this week. Who is it from, and what did it say? HASTINGS: The letter was from a public affairs official in Kabul, named Colonel Wayne Shanks, and it just basically laid out the case that I, noting that I had, had approval and that approval was being revoked because the military was unhappy with, first, the helicopter story, and actually, they, they, they mentioned the helicopter story, and then they mentioned the story that I wrote about General McChrystal for Rolling Stone. VIEIRA: So they specifically pointed out two stories? HASTINGS: Two stories, yes. But the more important part of their case being, what seemed it to be the General McChrystal story. And in fact, what they refer to as the “political fallout” from the General McChrystal story. So nothing to do, really, or there was no specific cases where they mentioned accuracy or anything I got wrong, or, or any, any rules I supposedly broke. VIEIRA: Well when asked about this, a spokesperson for the Defense Department said this, and I’m quoting here, “There is no right to embed. It is a choice made between units and individual reporters. And a key element of an embed is having trust that the individuals are going to abide by the ground rules. The command in Afghanistan decided there wasn’t the trust requisite, and denied your request.” In other words, they didn’t trust you to accurately report. HASTINGS: And that’s what’s very troubling about this. I’ve been doing this for five years. I’ve gone on dozens of embeds with American troops, accompanied them on many combat missions, traveled regularly with senior military officials and I’ve never had an issue. In fact I have many great friends, both Marines and soldiers, who, who I’ve met along the way for this. I think what also should be made clear is that my travels with General McChrystal were not considered an embed at the time. And if the military’s position now is that it was an embed, then the rules for embeds are very clear. Rule number seven says all comments are on the record. All interviews with service personnel are on the record. VIEIRA: Did you take comments off the record- HASTINGS: No. VIEIRA: -in that, in that interview with General McChrystal at all? HASTINGS: No, and, in fact, if you look at the, the people who are sort of making that assertion, and what, and what appears to be their case about why they’re, why they’re saying I can’t do this embed, those assertions are being made by people who, unfortunately, lost their job as a result of the article, and they’re currently under investigation. So they’re not necessarily the most credible sources. VIEIRA: So why do you think, ultimately, you lost this, this right to an embed? I mean, what do you think is going on? Is it the McChrystal article or is there something much bigger than that? HASTINGS: I think it’s, I think it’s much bigger. This is not just about a Rolling Stone reporter being banned from an embed. This is a symptom of essentially the war, and how the war is going. June and July were the deadliest months that we’ve ever seen in the war in Afghanistan. The war has hit its all-time low in approval ratings, so clearly there’s great concern in Washington about how the war is going, and the response to this embed. The response to me on this embed sort of indicates that. I think it’s important to, to just let you know, with this helicopter story, these are stories that I’m very passionate about telling. And it is a great privilege to tell the story of the troops. VIEIRA: But do you think, but do you think the military is trying to say to reporters, “We will stifle you, if you don’t tell the story the way we want it told?” HASTINGS: That appears to be the case. You’d have to ask the military if that’s what they’re doing. But, but I think if we look at just, say, the, the, the story about the Kaiwa pilots — the Kaiwa is a kind of an attack helicopter – you know, sometimes, sometimes reporters will do a story about policy. Sometimes that’s going to be very critical. I think that’s a good thing to be critical about policy, especially if the policy is not going well. And sometimes you do it about the people who are fighting the war, the American men and women over there who are actually implementing the policy, and whose stories deserve to be told. And for that I’ve always said it’s a privilege to, to be able to see that. VIEIRA: Alright, Michael Hastings. Thank you so much for joining us this morning. Appreciate it. HASTINGS: Thanks for having me. Appreciate it.

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Today Show Invites on Rolling Stone Reporter to Complain About Pentagon Ban

Animated Lindsay Lohan Stars in Instant Prison Classic

After months of the nuanced, carefully reported reality brought to us by Apple Action News , there is a new animated-news sheriff in town. Look no further than the Lindsay Lohan saga introduced today by NMA News, a like-minded Asian media enterprise that might have just shattered the mold for CGI journalism. Trust me: However sick you think you are of Lindsay Lohan, you really must see this.

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Animated Lindsay Lohan Stars in Instant Prison Classic

What’s On: So You Think You Can Vote for the Right Dancer?

So You Think You Can Dance is nearing its final stages, and that means the home viewers have all the power now. Judges Nigel Lythgoe, Mia Michaels, and Adam Shankman can’t protect people like Robert and Lauren anymore — it’s up to voters to select the next great dance icon. Related: Don’t mess this up for Lauren , jerks.

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What’s On: So You Think You Can Vote for the Right Dancer?

3-D Printers Capable Of Producing Usable Objects Are Here –

New printers can take a cat-scan x-ray from a doctor and re-create an exact replica of your back column or heart, or create any of your drawings into real 3-D objects. added by: onemalefla

46,000 Square Miles Of Forest Needed To Supply 120 Planned US Wood-Fired Power Plants

Southern pine wood chips. Image credit: USDA Southern Research Station . Research Update, Wood to Energy Biomass burning for electricity still looks to be a political and environmental black hole, presenting more dreadful questions than a tree hugger can shake a blog at. Why, for example, are 120 wood burning power plants being planned in multiple US states? Are banks and managing utilities planning for biomass (a euphemism for wood-fired) just to meet state renewable energy goals? Is it a coincidence that the projects are scheduled for upgrading mos… Read the full story on TreeHugger

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46,000 Square Miles Of Forest Needed To Supply 120 Planned US Wood-Fired Power Plants

Watch Big Brother Season 12 Episode 6 – Veto Competition #2

Watch Big Brother S12E6: Veto Competition #2 The latest installment of Big Brother which is entitled “Veto Competition #2” is the TV show’s 6th episode of the 12th season that aired last

Google Energy Signs 20-Year, 114 MW Wind Power Contract

Photo: Google Blog , logo added by Michael G.R. Part of Google’s Goal of Being Carbon-Neutral Google Energy, a subsidiary of Google that was created to give the company the ability to buy power on the wholesale market, has just inked a 20-year deal to buy 114 megawatts of power from the NextEra Energy Resources Story County II wind farm in Iowa. This is just one of many approaches that Google takes to try to become a carbon-neutral company. Read on for more details…. Read the full story on TreeHugger

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Google Energy Signs 20-Year, 114 MW Wind Power Contract

AP Touts Stimulus in German Recovery, Ignores Tax Cuts

If it worked for Germany, it should work for the United States, right? In a July 21 story , AP writer Geir Moulson praised government stimulus for helping Germany “bounce back” from the recession. Moulson highlighted two government stimulus packages totaling $104 billion and a government-sponsored program that cut back workers’ hours instead of laying them off as reasons for Germany’s endurance: “The various government measures are all part of the upswing.” However, nowhere in Moulsion’s 25-paragraph story did he acknowledge tax cuts over the past decade as a reason for Germany’s success. As reported in Deutsche Welle , a German media outlet, the European Union’s statistical office indicated Germany’s corporate tax rate was cut to 29.8 percent in 2010, a 42-percent decrease from the 51.6-percent rate in 2000. Germany has also cut income taxes by 3.6 percent over the past ten years. Moulson did acknowledge Germany’s role in the world economy as a factor, but for the most part, he took every opportunity to praise the government stimulus: “The main driving force for Germany, a major exporter, remains the growing world economy, the Bundesbank said. Still, there’s general agreement that the way to recovery was paved in part by government spending.” The AP story is only the latest example of media outlets championing government stimulus packages as a solution to economy woes while downplaying the benefits of tax cuts and other conservative solutions.

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AP Touts Stimulus in German Recovery, Ignores Tax Cuts