Dutch architecture firm DUS has developed The KamerMaker (RoomBuilder) – a 3D printer so large that it can create entire rooms! Dubbed by its creators the “world’s first movable pavilion,” the KamerMaker features an enlarged ‘Ultimaker’ 3D printing machine that is so big it’s actually capable of printing smaller pavilions. In fact, it is capable of printing objects as large as 7.2 feet by 7.2 feet by 11.4 feet. Not only that, but the large-scale 3D printer can produce objects made from corn bio-plastic.
Tuesday, November 25, 2014
A 3D Printer That Uses Bioplastic
Monday, October 27, 2014
Solar Power Installations Jump to a New Annual Record
The year 2013 saw record-breaking growth for solar electricity generation as the photovoltaic (PV) and concentrated solar thermal power (CSP) markets continued to grow. With over 39 gigawatts installed worldwide, the PV solar market represented one third of all newly-added renewable energy capacity, write Worldwatch’s Max Lander and Climate and Energy Intern Xiangyu Wu in the Worldwatch Institute’s latest Vital Signs Online trend (www.worldwatch.org).Solar PV installations nearly matched those of hydropower and, for the first time, outpaced wind additions. Even though photovoltaics continue to dwarf CSP capacity, the CSP market also had another year of impressive growth. By the end of 2013, a total of 19 countries had CSP plants installed or under construction.
Consumption of power from PV and CSP plants increased by 30 percent globally in 2013 to reach 124.8 terawatt-hours. Europe accounted for the majority of global solar power consumption (67 percent), followed by Asia (23.9 percent) and North America (8.1 percent). Worldwide, solar consumption equaled 0.5 percent of electricity generation from all sources. ... In July 2014, global PV module spot prices reached an all-time low of $0.63 per watt. For the first time, Asia overtook Europe as the largest regional market.
While global PV module production increased by only 3 percent over 2012, module shipments jumped by 24 percent, signaling an easing of oversupply problems.
Prospects are bright for solar development as prices continue to fall and approach grid parity in an increasing number of contexts. Rooftop solar is already less expensive per megawatt-hour than retail electricity in Australia, Brazil, Denmark, Italy, and Germany. Estimates now also show that PV has become price-competitive without subsidies in 15 countries. For2014, solar installations are estimated to reach 40–51 gigawatts.
Friday, October 17, 2014
A Galaxy for Science and Research
NGC 134 is a barred spiral with its spiral arms loosely wrapped around a bright, bar-shaped central region. The red features lounging along its spiral arms are glowing clouds of hot gas in which stars are forming, so-called HII regions. The galaxy also shows prominent dark lanes of dust across the disc, obscuring part of the galaxys starlight.
NGC 134 – Click for 1280×1024 image
More: here
Monday, October 13, 2014
Fracking A new dawn for misplaced optimism
You would think we were swimming in oil. The International Energy Agencys (IEA) latest World Energy Outlook forecasts that the United States will outstrip Saudi Arabia as the worlds largest producer by 2017, becoming "all but self-sufficient in net terms" in energy production. While the "peak oil" pessimists are clearly wrong, so is a simplistic picture of fossil fuel abundance.When the IEA predicts an increase in "oil production" from 84 million barrels a day in 2011 to 97 in 2035, it is talking about "natural gas liquids and unconventional sources", which includes a big reliance on "fracking" for shale gas. Conventional oil output will stay largely flat, or fall.
The IEA has been exposed before as having, under US pressure, artificially inflated official reserve figures. And now US energy consultants Ruud Weijermars and Crispian McCredie say there is strong "basis for reasonable doubts about the reliability and durability of US shale gas reserves". The New York Times found that state geologists, industry lawyers and market analysts privately questioned "whether companies are intentionally, and even illegally, overstating the productivity of their wells and the size of their reserves." And former UK chief government scientist Sir David King has concluded that the industry had overstated world oil reserves by about a third. In Nature, he dismissed notions that a shale gas boom would avert an energy crisis, noting that production at wells drops by as much as 90 per cent within the first year.
The rapid decline rates make shale gas distinctly unprofitable. Arthur Berman, a former Amoco petroleum geologist, cites the Eagle Ford shale, Texas, where the decline rate is so high that simply to keep production flat, they will have to drill "almost 1,000 wells" a year, requiring "about $10bn or $12bn a year just to replace supply". In all, "it starts to approach the amount of money needed to bail out the banking industry. Where is that money to come from?"
In September, the leader of the US shale gas revolution, Chesapeake Energy, sold $6.9bn of gas fields and pipelines to stave off collapse. Four months ago Exxons CEO, Rex Tillerson, told a private meeting: "Were making no money. Its all in the red." The worst-case scenario is that several large oil companies at once face financial distress. Then, says Berman, "you may have a couple of big bankruptcies or takeovers and everybody pulls back, all the money evaporates, all the capital goes away."
Saturday, October 11, 2014
Michael Klare How to Wreck a Planet 101
Here’s the good news about energy: thanks to rising oil prices and deteriorating economic conditions worldwide, the International Energy Agency (IEA) reports that global oil demand will not grow this year as much as once assumed, which may provide some temporary price relief at the gas pump. In its May Oil Market Report, the IEA reduced its 2011 estimate for global oil consumption by 190,000 barrels per day, pegging it at 89.2 million barrels daily. As a result, retail prices may not reach the stratospheric levels predicted earlier this year, though they will undoubtedly remain higher than at any time since the peak months of 2008, just before the global economic meltdown. Keep in mind that this is the good news.
As for the bad news: the world faces an array of intractable energy problems that, if anything, have only worsened in recent weeks. These problems are multiplying on either side of energy’s key geological divide: below ground, once-abundant reserves of easy-to-get “conventional” oil, natural gas, and coal are drying up; above ground, human miscalculation and geopolitics are limiting the production and availability of specific energy supplies. With troubles mounting in both arenas, our energy prospects are only growing dimmer.
Here’s one simple fact without which our deepening energy crisis makes no sense: the world economy is structured in such a way that standing still in energy production is not an option. In order to satisfy the staggering needs of older industrial powers like the United States along with the voracious thirst of rising powers like China, global energy must grow substantially every year. According to the projections of the U.S. Department of Energy (DoE), world energy output, based on 2007 levels, must rise 29% to 640 quadrillion British thermal units by 2025 to meet anticipated demand. Even if usage grows somewhat more slowly than projected, any failure to satisfy the world’s requirements produces a perception of scarcity, which also means rising fuel prices. These are precisely the conditions we see today and should expect for the indefinite future.
It is against this backdrop that three crucial developments of 2011 are changing the way we are likely to live on this planet for the foreseeable future.
Tough-Oil Rebels
The first and still most momentous of the year’s energy shocks was the series of events precipitated by the Tunisian and Egyptian rebellions and the ensuing “Arab Spring” in the greater Middle East. Neither Tunisia nor Egypt was, in fact, a major oil producer, but the political shockwaves these insurrections unleashed has spread to other countries in the region that are, including Libya, Oman, and Saudi Arabia. At this point, the Saudi and Omani leaderships appear to be keeping a tight lid on protests, but Libyan production, normally averaging approximately 1.7 million barrels per day, has fallen to near zero. ...
Nuclear Power on the Downward Slope
In terms of the energy markets, the second major development of 2011 occurred on March 11th when an unexpectedly powerful earthquake and tsunami struck Japan. As a start, nature’s two-fisted attack damaged or destroyed a significant proportion of northern Japan’s energy infrastructure, including refineries, port facilities, pipelines, power plants, and transmission lines. In addition, of course, it devastated four nuclear plants at Fukushima, resulting, according to the U.S. Department of Energy, in the permanent loss of 6,800 megawatts of electric generating capacity.
This, in turn, has forced Japan to increase its imports of oil, coal, and natural gas, adding to the pressure on global supplies. With Fukushima and other nuclear plants off line, industry analysts calculate that Japanese oil imports could rise by as much as 238,000 barrels per day, and imports of natural gas by 1.2 billion cubic feet per day (mostly in the form of liquefied natural gas, or LNG). ...
How Drought Strangles Energy
The third major energy development of 2011, less obviously energy-connected than the other two, has been a series of persistent, often record, droughts gripping many areas of the planet. Typically, the most immediate and dramatic effect of prolonged drought is a reduction in grain production, leading to ever-higher food prices and ever more social turmoil.
Intense drought over the past year in Australia, China, Russia, and parts of the Middle East, South America, the United States, and most recently northern Europe has contributed to the current record-breaking price of food -- and this, in turn, has been a key factor in the political unrest now sweeping North Africa, East Africa, and the Middle East. But drought has an energy effect as well. It can reduce the flow of major river systems, leading to a decline in the output of hydroelectric power plants, as is now happening in several drought-stricken regions.
By far the greatest threat to electricity generation exists in China, which is suffering from one of its worst droughts ever. Rainfall levels from January to April in the drainage basin of the Yangtze, Chinas longest and most economically important river, have been 40% lower than the average of the past 50 years, according to China Daily. This has resulted in a significant decline in hydropower and severe electricity shortages throughout much of central China.
The Chinese are burning more coal to generate electricity, but domestic mines no longer satisfy the country’s needs and so China has become a major coal importer. Rising demand combined with inadequate supply has led to a spike in coal prices, and with no comparable spurt in electricity rates (set by the government), many Chinese utilities are rationing power rather than buy more expensive coal and operate at a loss. In response, industries are upping their reliance on diesel-powered backup generators, which in turn increases China’s demand for imported oil, putting yet more pressure on global fuel prices.
Wrecking the Planet
So now we enter June with continuing unrest in the Middle East, a grim outlook for nuclear power, and a severe electricity shortage in China (and possibly elsewhere). What else do we see on the global energy horizon?
Despite the IEA’s forecast of diminished future oil consumption, global energy demand continues to outpace increases in supply. From all indications, this imbalance will persist.
Take oil. A growing number of energy analysts now agree that the era of “easy oil” has ended and that the world must increasingly rely on hard-to-get “tough oil.” It is widely assumed, moreover, that the planet harbors a lot of this stuff -- deep underground, far offshore, in problematic geological formations like Canada’s tar sands, and in the melting Arctic. However, extracting and processing tough oil will prove ever more costly and involve great human, and even greater environmental, risk. Think: BP’s Deepwater Horizon disaster of April 2010 in the Gulf of Mexico.
Such is the world’s thirst for oil that a growing amount of this stuff will nonetheless be extracted, even if not, in all likelihood, at a pace and on a scale necessary to replace the disappearance of yesterday’s and today’s easy oil. Along with continued instability in the Middle East, this tough-oil landscape seems to underlie expectations that the price of oil will only rise in the coming years. In a poll of global energy company executives conducted this April by the KPMG Global Energy Institute, 64% of those surveyed predicted that crude oil prices will cross the $120 per barrel barrier before the end of 2011. Approximately one-third of them predicted that the price would go even higher, with 17% believing it would reach $131-$140 per barrel; 9%, $141-$150 per barrel; and 6%, above the $150 mark.
The price of coal, too, has soared in recent months, thanks to mounting worldwide demand as supplies of energy from nuclear power and hydroelectricity have contracted. Many countries have launched significant efforts to spur the development of renewable energy, but these are not advancing fast enough or on a large enough scale to replace older technologies quickly. The only bright spot, experts say, is the growing extraction of natural gas from shale rock in the United States through the use of hydraulic fracturing (“hydro-fracking”).
Proponents of shale gas claim it can provide a large share of America’s energy needs in the years ahead, while actually reducing harm to the environment when compared to coal and oil (as gas emits less carbon dioxide per unit of energy released); however, an expanding chorus of opponents are warning of the threat to municipal water supplies posed by the use of toxic chemicals in the fracking process. These warnings have proven convincing enough to lead lawmakers in a growing number of states to begin placing restrictions on the practice, throwing into doubt the future contribution of shale gas to the nation’s energy supply. Also, on May 12th, the French National Assembly (the powerful lower house of parliament) voted 287 to 146 to ban hydro-fracking in France, becoming the first nation to do so.
The environmental problems of shale gas are hardly unique. The fact is that all of the strategies now being considered to extend the life-spans of oil, coal, and natural gas involve severe economic and environmental risks and costs -- as, of course, does the very use of fossil fuels of any sort at a moment when the first IEA numbers for 2010 indicate that it was an unexpectedly record-breaking year for humanity when it came to dumping greenhouse gases into the atmosphere.
With the easily accessible mammoth oil fields of Texas, Venezuela, and the Middle East either used up or soon to be significantly depleted, the future of oil rests on third-rate stuff like tar sands, shale oil, and extra-heavy crude that require a lot of energy to extract, processes that emit added greenhouse gases, and as with those tar sands, tend to play havoc with the environment.
Shale gas is typical. Though plentiful, it can only be pried loose from underground shale formations through the use of explosives and highly pressurized water mixed with toxic chemicals. In addition, to obtain the necessary quantities of shale oil, many tens of thousands of wells will have to be sunk across the American landscape, any of one of which could prove to be an environmental disaster.
Likewise, the future of coal will rest on increasingly invasive and hazardous techniques, such as the explosive removal of mountaintops and the dispersal of excess rock and toxic wastes in the valleys below. Any increase in the use of coal will also enhance climate change, since coal emits more carbon dioxide than do oil and natural gas.
Here’s the bottom line: Any expectations that ever-increasing supplies of energy will meet demand in the coming years are destined to be disappointed. Instead, recurring shortages, rising prices, and mounting discontent are likely to be the thematic drumbeat of the globe’s energy future.
If we don’t abandon a belief that unrestricted growth is our inalienable birthright and embrace the genuine promise of renewable energy (with the necessary effort and investment that would make such a commitment meaningful), the future is likely to prove grim indeed. Then, the history of energy, as taught in some late twenty-first-century university, will be labeled: How to Wreck the Planet 101.
Friday, October 10, 2014
A couple of things about memory
Children's Memory May Be More Reliable Than Adults' In Court Cases
Researchers Valerie Reyna, human development professor, and Chuck Brainerd, human development and law school professor--both from Cornell University--argue that like the two-headed Roman god Janus, memory is of two minds--that is, memories are captured and recorded separately and differently in two distinct parts of the mind.
They say children depend more heavily on a part of the mind that records, "what actually happened," while adults depend more on another part of the mind that records, "the meaning of what happened." As a result, they say, adults are more susceptible to false memories, which can be extremely problematic in court cases.
The implications of these results for legal testimony is not what I find especially interesting here. In fact, there are reasons why the testimony of children has sometimes been found to be less reliable than that of adults. Namely, in some cases, the techniques used to interview the children (before trial) have been improperly coercive or suggestive of particular interpretations.
What does seem interesting is the hypothesis that in adults memories of the same event tend to be stored in two distinct forms: literal details of "what happened", and interpretive judgments about the "meaning" of an event. But that in children it is primarily the actual details that are stored.
Reyna and Brainerds Fuzzy Trace Theory hypothesizes that people store two types of experience records or memories: verbatim traces and gist traces.
Verbatim traces are memories of what actually happened. Gist traces are based on a persons understanding of what happened, or what the event meant to him or her. Gist traces stimulate false memories because they store impressions of what an event meant, which can be inconsistent with what actually happened.
The researchers have experimental evidence to support their conclusions. Some of this is noted in earlier accounts, such as this:
Children Less Prone To False Memories, Implications For Eyewitness Testimony, Study Shows
In a study published in the May issue of Psychological Science, Brainerd and Reyna presented a list of words for groups of first, fifth and ninth graders. Many of the words from this "study list" were related to each other (by belonging to certain categories such as animals, furniture, mens names) while others were unrelated "filler" words.
After a short break, the students were presented with a new "test list" composed of study list words, new words belonging to the aforementioned categories (animals, furniture, etc.), and distracter words that were new and entirely unrelated to the categories or the study list. Their task was to identify whether they had previously heard a word or not.
As predicted, if the test list provided a new word with a closely related meaning (a "semantic relation") to a word from the study list, older children were more likely to assert that they had heard it before. Simply put, the older children had more false memories in this case than younger children.
One can speculate about whats going on here. As people mature through childhood, they are constantly learning about the interrelationship of isolated details and events. (For instance, "Dad acts more scary after hes been drinking beer.") In addition, the accumulation of details makes more literal forms of memory cumbersome (and liable to confusion), so people learn to make abstractions and interpretations that summarize details and make storage easier by associating similar details in more general categories. However, this kind of fuzzy storage (or "fuzzy traces" as Brainerd and Reyna call it) can misrepresent the facts. (For instance, "Dad was drunk when he hit me" – which might not actually be true.)
Second, and not directly related to this, there are two quite indepentdent studies that show something about the relationship between memory and experience of stress.
The first item concerns observation of squirrels:
Correct Levels Of Stress Hormones Boost Learning, Squirrel Study Suggests
Tests on the influence that a stress-related hormone has on learning in ground squirrels could have an impact on understanding how it influences human learning, according to a University of Chicago researcher.
Jill Mateo, Assistant Professor in Comparative Human Development, has found that when they perform normal survival tasks, ground squirrels learn more quickly if they have a modest amount of cortisol, a hormone produced in response to stress, than those with either high or low levels of cortisol.
In humans, cortisol production is also related to stress and is known to have an impact on learning, but that impact is not well understood, Mateo said.
This should sound familiar to anyone whos been through even a few moderately difficult college courses. Namely, if the work in a particular course isnt difficult enough to cause at least a little stress, retention of the details may not be very complete. Without some stress, the material just doesnt seem "important" enough, even if its new to the student, to compel the students attention to the details and the complexity. But of course, if the material is difficult enough to cause excessive stress, anxiety can get in the way of successfully organizing the material in the students mind.
The second study looked at the actual neurobiology of learning under conditions of acute stress:
Short-term Stress Can Affect Learning And Memory
Short-term stress lasting as little as a few hours can impair brain-cell communication in areas associated with learning and memory, University of California, Irvine researchers have found.
It has been known that severe stress lasting weeks or months can impair cell communication in the brains learning and memory region, but this study provides the first evidence that short-term stress has the same effect.
As it turns out, another stress-related hormone besides cortisol is involved, corticotropin releasing hormone (CRH), and the latter is more significant under conditions of acute stress:
In their study, Baram and her UC Irvine colleagues identified a novel process by which stress caused these effects. They found that rather than involving the widely known stress hormone cortisol, which circulates throughout the body, acute stress activated selective molecules called corticotropin releasing hormones, which disrupted the process by which the brain collects and stores memories.
Learning and memory take place at synapses, which are junctions through which brain cells communicate. These synapses reside on specialized branchlike protrusions on neurons called dendritic spines.
In rat and mouse studies, Barams group saw that the release of CRH in the hippocampus, the brains primary learning and memory center, led to the rapid disintegration of these dendritic spines, which in turn limited the ability of synapses to collect and store memories.
The researchers discovered that blocking the CRH molecules interaction with their receptor molecules eliminated stress damage to dendritic spines in the hippocampal cells involved with learning and memory.
The role of cortisol, in learning under conditions of moderate stress, remains somewhat less clear. In addition to the squirrel study, anecdotal experience with so-called "flashbulb memories" supports the idea that some degree of stress can assist the formation of memories. The Wikipedia article states, without references, "Some biologists believe that the hormone cortisol, which is released in response to stressful incidents, cooperate with epinephrine (adrenaline) to cause the formation of flashbulb memories by the brain, functioning to help remembering things to avoid in the future." The squirrel study suggests cortisol actually has some role in memory formation, rather than being just a coincidental byproduct of stress. (See also the article on Emotion and memory.
Tags: memory, stress, cortisol, corticotropin-releasing hormone
Thursday, October 9, 2014
Googles Floating Data Center Is Just A Party Barge
According to the San Francisco CBS affiliate KPIX, Google will actually use the barge as a party space and an upscale showroom for the companys Google X projects. Google has yet to comment on the mysterious barge, but KPIX cites "multiple sources" familiar with the matter.
A climate risk to nuclear power
Compared to coal and natural gas, nuclear power plants offer a significant advantage when it comes to greenhouse gas emissions – they dont emit any. However, in an ironic twist, it seems that climate change is increasingly causing problems for operators of nuclear plants.Like coal-fired power plants, nuclear facilities use large amounts of water for cooling purposes. After water has cycled through the plant, it is discharged back into a nearby waterway, usually a lake or a river, at a higher temperature. US state regulations prohibit nuclear plants from operating once water temperatures go above a certain threshold, in part because it could compromise the safe operation of the facility, and also because discharging very warm water can kill fish and other marine life.
According to the New York Times Matthew L. Wald, the Braidwood Generating Station, located about 60 miles southwest of Chicago, was recently granted a waiver to continue operating despite the fact that the unusually hot and dry summer had heated the water it was taking in to a toasty 102 degrees Fahrenheit – 2 degrees above the legal operating limit for the plant.
Like much of the country, Illinois has had an extremely hot summer. In fact, Illinois had its warmest January-to-June period on record.
According to Walds story, operators of the Braidwood plant have been hit by the combination of extremely hot days and very warm nights. Nationally, thousands of daily high temperature records and warm overnight low temperature records have been set this summer.
The Times quoted Craig Nesbit, a spokesman for Exelon, Braidwoods operator:
"Asked whether he viewed Braidwood’s difficulties as a byproduct of global warming, Mr Nesbit said: “I’m not a climatologist. But clearly the calculations when the plant was first operated in 1986 are not what is sufficient today, not all the time.”With global warming already increasing the odds of extreme heat events, the challenges faced at Braidwood and Browns Ferry are likely to become more common in the coming years. Its an open question as to whether the nuclear industry is prepared for this. As the Union of Concerned Scientists David Lochbaum told the Times, “Nuclear plants like Goldilocks weather – not too hot, not too cold, but just right." Such weather is getting harder and harder to come by.Climate Centrals Alyson Kenward reported on the threat that climate change poses to electricity generation in 2011, when she detailed problems that a 2010 heat wave caused for operators of the Browns Ferry nuclear plant in Alabama.
"With river water so warm, the nuclear plant couldn’t draw in as much water as usual to cool the facilitys three reactors, or else the water it pumped back into the river could be hot enough to harm the local ecosystem, says Golden. But for every day that the Browns Ferry plant ran at 50 per cent of its maximum output, the TVA had to spend $1 million more than usual to purchase power from somewhere else, he says.
What happened in northern Alabama last summer, at the largest of TVAs nuclear power plants, did not present a human safety concern. Operators knew there was never a risk of an explosion or nuclear meltdown, nor was there a threat of leaking radioactive material. But the prolonged spell of hot weather put the TVA at risk of violating environmental permits, with hefty fines as one consequence and potential harm to the Tennessee River ecosystem as another.
It’s not the first time high temperatures have affected the performance of the Browns Ferry plant, and extreme heat is a growing concern for power plant operators across the Southeast."
Wednesday, October 8, 2014
A Long Bet on Peak Travel
One of the miracles of the modern world is our capacity for getting around – hop on a plane, nap a few hours, and you’re on the other side of a continent! Technologically enabled, we’ve embraced this ability with gusto and are currently more mobile a species than ever before. But, according to a pair of Stanford researchers, the industrialized world is mellowing on this trend a bit. They claim that travel in several countries may have peaked earlier this decade:A study of eight industrialized countries, including the United States, shows that seemingly inexorable trends — ever more people, more cars and more driving — came to a halt in the early years of the 21st century, well before the recent escalation in fuel prices. It could be a sign, researchers said, that the demand for travel and the demand for car ownership in those countries has reached a saturation point.
-Miller-McCune
A Long Bet placed in 02005 hinted at this potential, though it imagined a more dire mechanism: peak oil. While the necessary statistics to certify Long Bet 197 won’t be published for some time yet, they’ll come from the U.S. Bureau of Transportation Statistics and tell us whether highway vehicle miles traveled in the U.S. for 02010 exceeded those of 02005. The Bet is that they’ll actually be lower – essentially that Americans collectively drove less in 02010 than in 02005.
The scenario imagined by predictor Daniel Simon in 02005 was that an energy crisis brought on by peak oil production would push up the cost of personal motor vehicle travel enough to halt or reverse its growth. Glen Raphael was doubtful enough to put up the money for a Bet and explained he expected growth to continue. Read their full arguments at Long Bets.
According to the BTS table they provided as a reference for adjudication, total vehicle miles travelled in 02005 were 2,989,430. The most recent year published on that table is 02008 and it checks in at 2,973,509 – almost 20,000 miles fewer. So, we can’t finalize the Bet as of yet, but the data we’ve got is in line with the Stanford study as well as Simon’s prediction, despite a seemingly more mundane overall picture.
Check back in a year or two for the exciting conclusion! (Also, if you or someone you know works at BTS, let us know if we’ve missed more recent numbers.)
Monday, October 6, 2014
Black Hole Outflows From Centaurus A
This image of Centaurus A shows a spectacular new view of a supermassive black holes power. Jets and lobes powered by the central black hole in this nearby galaxy are shown by submillimeter data (colored orange) from the Atacama Pathfinder Experiment (APEX) telescope in Chile and X-ray data (colored blue) from the Chandra X-ray Observatory. Visible light data from the Wide Field Imager on the Max-Planck/ESO 2.2 m telescope, also located in Chile, shows the dust lane in the galaxy and background stars. The X-ray jet in the upper left extends for about 13,000 light years away from the black hole. The APEX data shows that material in the jet is travelling at about half the speed of light.
Centaurus A – click for 665×505 image
Additional information:
Black Hole Outflows From Centaurus A (1/28/09)
Thursday, October 2, 2014
Green algae as a source for hydrogen production
There are different biological ways that allow the production of hydrogen with one of the most interesting being using photosynthetic microorganisms such as green algae. During the process of photosynthesis water is split into hydrogen ions (H+) and electrons (e-) which can later be combined into hydrogen gas with the use of special enzymes.
It has been know for quite some time that green algae can use energy from the sun through photosynthesis to produce hydrogen through their own metabolism, however this process is usually accompanied with insufficient efficiency.
The latest study from Swedish scientists has discovered that most of the hydrogen production is driven directly by solar energy meaning that there is a good possibility that in the future it will be possible to control the green algae so that the efficiency becomes significantly higher than it is today.
The previous studies, on the other hand, claimed that most of the hydrogen gas gets its energy from other paths in the metabolism of the green algae. This would lead to conclusion that green algae are no more efficient as energy crops than plants.
This new study gives hope that green algae could become major fuel source in years to come.
Monday, September 29, 2014
Crippled Kashagan oil project a bureaucratic nightmare
Oil and gas services work has dried up to the point where one friend was forced to start looking at opportunities offshore (after following his once 120 person team into redundancy). He noted that the pay available elsewhere is far less than most Perth engineers have become accustomed too, and was considering heading to Kazahkstan for his next job.
Kashagan remains one of the larger projects underway worldwide - Reuters report that its not progressing all that well - Crippled Kashagan oil project a bureaucratic nightmare.
Giant Kazakh oilfield Kashagan, which was brought to a halt by leaks shortly after start-up last year, is grappling with a bureaucratic "nightmare" on top of its engineering troubles as it strives for commercial production in 2014.The scale and complexity of the worlds most expensive standalone oil project led its seven partners away from the traditional single operator command-and-control model, where one of the larger companies takes charge while the others provide support and share the risks, costs and rewards. ...
The Caspian Sea project aims to exploit the biggest oil discovery in decades, producing a peak of 1.66 million barrels a day - as much oil as OPEC member Angola, from a reserve almost as big as Brazils. Much of it is built on artificial islands to avoid damage from pack ice in a shallow sea that freezes for five months a year in temperatures that drop below minus 30 degrees Celsius (-22F).
The field extends over 3,375 square kilometres (1,303 sq miles), and the whole onshore and offshore site is bigger still. The oil is 4,200 metres (4,590 yards) below the seabed, at very high pressure, and the associated gas reaching the surface is mixed with some of the highest concentrations of toxic, metal-eating hydrogen sulphide (H2S) ever encountered.
Kashagan has cost an estimated $50 billion so far, five times early projections, and its 13-year life is a tale mostly of delay.
Wednesday, September 24, 2014
9 999 EV — Shai Agassi’s Formula For A Disruptive EV Takeover Apple Style
In the previous three parts of this series we have looked at the lessons the auto industry can learn from Tesla. I identified four key takeaways all carmakers should use as the foundation for their electric vehicle plans. The lessons all add up to the following principle:Design a desirable Electric car that is upgradable over the years. Separate between car ownership and the battery, since batteries continue to improve exponentially. Finally, don’t force this new category of product through a mixed channel selling both ICE cars and EVs.
The recommendation to mass volume carmakers, those making more than 1 million cars per year, was not to try and beat Tesla in the category it created and dominates – Luxury electric cars. Tesla predicts it will make 21,000 cars this year – Nothing in the scale these massive carmakers operate enables to make any meaningful profit when they make a model at such low volume.
Instead, my recommendation was to make a desirable electric crossover, with space and power, then equip it with enough of a battery to get great range – say 150 to 200 miles. Most crucially of all – do not sell that battery. Instead, partner with an operator that owns the batteries, the one you buy with the car, the ones available on the road, and the ones drivers will use over the life of the car. The operator will package batteries together with electricity and offer those as “electric-miles” offered for a fixed monthly fee. For the sake of argument, let’s make that monthly fee equal to the cost of a weekly stop at the gas station today – roughly $300 a month.
Picture a great car serviced through an energy model that allows you to drive it unlimited miles but pay a flat monthly fee as you do so. #Like
The last remaining question was the price point that will make this electric crossover so disruptive as to drive demand through the roof. We pegged “infinite demand” at the imaginary market size of 1M cars worldwide. Mind you, that is only 1% of cars sold each year.
The final claim of Part III was:
If the market leader priced such a car starting at $9,999 after all incentives, without the cost of the battery (remember there is an operator that owns that battery) – a new category will be born, with demand far surpassing any imagination.
The metaphor I used was the iPad. At launch the first iPad was priced at $499, far below the price point for a powerful laptop. Compare that with Windows’ TabletPCs that asked for a premium above the price of a laptop, due to the “Tablet features”, such as touch. The result – TabletPC was always considered a niche segment where meaningless numbers were sold over the first 5-10 years in the market. Apple’s genius pricing of its first iPad at sub $500, combined with the fact that it was “an object of desire” disrupted the laptop market and shifted non-buyers (people who didn’t consider the need for a tablet before) into “Tablet devices”.
Sunday, September 21, 2014
Could Natural Gas Fuel a Trucking Revolution
The International Energy Agency (IEA) released its latest Medium-Term Gas Market Report in St. Petersburg, Russia last month. Although the IEA sees the growth of gas in the power sector slowing, they also cite its emergence as "a significant transportation fuel." What really caught my eye was their projection that gas over the next five years would have "a bigger impact on oil demand than biofuels and electric cars combined," in light of the US shale gas revolution and tougher pollution rules in China.Thats quite an assertion, considering oils longstanding dominance in transportation energy. As I noted in March, Italy, Pakistan and several other countries already have well-established demand for compressed natural gas (CNG) for passenger cars. Despite these hot spots only 3% of gas is currently used in transportation, globally, based on analysis from Citigroup. The IEA is forecasting that transportation growth will consume 10% of the projected global gas production increase of roughly 20 trillion cubic feet (TCF) per year by 2018. Thats 2 TCF per year of additional natural gas demand in the transport sector, equivalent to 1 million barrels per day of diesel fuel.
Id be more skeptical about that figure if I hadnt seen a presentation from Dr. Michael Gallagher of Westport Innovations at the Energy Information Administrations annual energy conference in Washington, DC last Monday. Westport specializes in natural gas engine technology for heavy-duty trucks and played a major role in implementing the LNG vision of the ports of Los Angeles and Long Beach, CA a few years ago.
Dr. Gallagher made a strong case for gas in heavy-duty trucking, starting with the low cost of US natural gas compared to oil and its products. Initial growth rates in several segments look encouraging, including transit buses and new trash trucks, for which natural gas now has around half the market. Growth in China has apparently been even faster, with LNG vehicles increasing at over 100% per year (from a small base) and natural gas refueling stations growing at 33% per year since 2003.
Do carbon nanotubes present a health hazard
Nanotubes Tracked In Blood And Liver: Study Finds No Adverse Effects
In the first experiments of their kind, researchers at Rice University and The University of Texas M. D. Anderson Cancer Center have determined that carbon nanotubes injected directly into the bloodstream of research lab animals cause no immediate adverse health effects and circulate for more than one hour before they are removed by the liver.
The findings are from the first in vivo animal study of chemically unmodified carbon nanotubes, a revolutionary nanomaterial that many researchers hope will prove useful in diagnosing and treating disease.
Of course, there needs to be much more research than that. Like long-term exposure, for example. But this is a promising start.
Tags: carbon nanotubes, nanotechnology
Saturday, September 20, 2014
Peak oil can fuel a change for the better
The advent of peak oil means we should prepare for a downscaling of our highly energy and resource-intensive lifestyles.
What is peak oil and why does it matter? And what effect will it have on the Western lifestyles we take for granted? These are not questions that many people are asking themselves yet, but this decade is going to change everything. Peak oil is upon us.
Peak oil does not mean that the world is about it run out of oil. It refers to the point at which the supply of oil can no longer increase. There is lots of the stuff left; its just getting much more difficult to find and extract, which means it is getting very hard, and perhaps impossible, to increase the overall flow of oil out of the ground. When the flow can no longer increase, that is peak oil. Supply will then plateau for a time and eventually enter terminal decline. This is the future that awaits us, because oil is a finite, non-renewable resource.
The prospect of peak oil is no longer a fringe theory held only by a few scaremongers. It is a geological reality that has been acknowledged even by conservative, mainstream institutions such as the International Energy Agency, the UK Industry Task Force and the United States military. Even the chief executive of one of the worlds largest oil companies, Total, said recently he expected demand to outstrip supply as early as 2014 or 2015. Given how fundamental oil is to our economies, this signifies the dawn of a new era in the human story.
While the supply of oil is stagnating, demand is still growing considerably. China and India are industrialising at an extraordinary pace, requiring huge amounts of oil, and even in the Middle East and Russia – the main oil exporting regions – oil consumption is growing fast. What this means is that competition is escalating over access to the limited supply, and basic economic principles dictate that when supply stagnates and demand increases, oil is going to get much more expensive – a situation that is already playing out.
The problem of peak oil, therefore, is not that we are running out of oil, but that we have already run out of cheap oil. Currently the world consumes about 89 million barrels a day, or 32 billion barrels a year. Those mind-boggling figures are why oil is called the lifeblood of industrial civilisation. It should be clear enough, then, that when oil gets more expensive, all things dependent on oil get more expensive. Since almost all products today are dependent on oil for transport (among other things, such as plastic), the age of expensive oil will eventually price much global trade out of the market. Peak oil probably means peak globalisation.
Friday, September 19, 2014
A Geothermal power plant for Malaysia
The countrys first environmental-friendly geother- mal power generation plant will begin operating in Tawau in three years.
The 30mW plant costing some RM400mil would be built and operated by Sabah-based Tawau Green Energy Sdn Bhd (TGE) with the electricity being channelled to the Sabah Electricity Sdn Bhd (SESB) power grid.
State Tourism, Culture and Environment Minister Datuk Masidi Manjun witnessed the signing of a 21-year renewable energy power purchase agreement between TGE and SESB yesterday.
TGE project director Andrew Amaladoss said the geothermal plant would be built on a 20ha site about 20km from Tawau town and adjacent to the Tawau Hills Park.
Amaladoss said TGE would tap geothermal energy by drilling 12 wells to a depth of between 1.8km and 2km.
Thursday, September 18, 2014
Battery Storage Could Get a Huge Boost from Seaweed
Lithium-ion batteries could hold up to 10 times as much energy per cell if silicon anodes were used instead of graphite ones. But manufacturers dont use silicon because such anodes degrade quickly as the battery is charged and discharged.
Researchers at the Georgia Institute of Technology and Clemson University think they might have found the ingredient that will make silicon anodes work—a common binding agent and food additive derived from algae and used in many household products. They say this material could not only make lithium-ion batteries more efficient, but also cleaner and cheaper to manufacture.
Lithium-ion batteries store energy by accumulating ions at the anode; during use, these ions migrate, via an electrolyte, to the cathode. The anodes are typically made by mixing an electroactive graphite powder with a polymer binder—typically polyvinylidene fluoride (PVDF)—dissolved in a solvent called NMP. The resulting slurry is spread on the metal foil used to collect electrical current, and dried.
If silicon particles are used as the basis of the electroactive powder, the batterys anode can hold more ions. But silicon particles swell as the battery is charged, increasing in volume up to four times their original size. This swelling causes cracks in the PVDF binder, damaging the anode. In research published today by Science, the Georgia Tech and Clemson scientists show that when alginate is used instead of PVDF, the anode can swell and the binder wont crack. This allows researchers to create a stable silicon anode that has, so far, been demonstrated to have eight times the capacity of the best graphite-based
The polymer alginate is made from brown algae, including the type which forms forests of giant kelp. It is already widely used as a gelling agent and a food additive. Initially, the researchers thought to replace PVDF with a combination of several different materials. Then, on theoretical grounds, they realized that a polymer with just the right kind of uniform structure could do all the things the binder was supposed to do, including providing good structural support while not chemically reacting with the electrolyte.
Yemen’s multiple proxy wars a recipe for a famine
For decades throughout the 20th century, the idea of famine had two dominant uses in the West.The first was proof of the Christian ideal that “the poor you will always have with you”, thus re-affirming the eternal need for charity, and the limited usefulness of political struggle — the second was to reaffirm a vaguely or explicitly racialist and Malthusian notion that the dusky-skinned two thirds of the world really couldn’t manage themselves that well, and were doomed to over-breeding and starvation. Before the Second World War, China was the locus for this concern/panic — in various famines until the 1949 revolution, children would be exchanged between families to be eaten, or sold in the marketplace.
After the war, attention switched to India, and then in the 1970s and ’80s, to Ethiopia and the rest of Africa. The story was static, and endlessly repeated — skeletal children, milk powder, guilt, appeals, etc. The global extravaganza of Live Aid in 1985 was probably the acme of this well-meant but bone-headed view of starvation — appropriately enough celebrated by a song in which a phalanx of stars wondered if animist and Muslim peoples even knew it was Christmas time at all.
But by this time another view of famine was beginning to permeate the liberal West, with the 1981 publication of Amartya Sen’s Poverty and Famines, which deployed an array of theories to argue that famines almost always occurred in regions where there was plenty of food — and that even when there was a will to alleviate the famine, the absence of democratic and open political structures made such alleviation impossible.
Sen’s example was the Bengal Famine of 1943 — something that Commonwealth readers rarely hear of in tales of WW2, because 3 million Indians died due to the incompetence, indecision and outright racism of the British authorities. Sen’s argument made an impact where more radical left-wing accounts of the political nature of famine had been dismissed — but many were still unwilling to concede one of his core points, that one of the great barriers to alleviating famine was the market itself.
Sen’s argument has made it impossible for Western news to report famine in the way it once did, but it’s a close run thing. Fragments of reasons a region might suddenly descend into desperate starvation are aired, but there remains a basic inability to tell a connected story. The default position remains the Pieta, the starving child in arms.
Which brings us to the Yemen famine, which has suddenly hit the headlines, after bubbling in the background of the news for months. Ten million people — nearly half of the country’s population — are at risk of starvation, yet the food shortage is not affecting whole regions or areas equally. The burden is falling overwhelmingly on the poor, with people starving while nearby markets are full.
Though there’s been a persistent food shortage since the global food price rise in 2008 — and in fact food has always been short for the poor in the country — the situation has been made urgent by several coincident factors. A drought has persisted for more than three years, and is at its worst this summer, leading to a lack of work for millions of rural labourers. It’s also Ramadan, which, perversely, as a month of daylight fasting, raises food prices — since the fasting is followed by night-time feasting.
Added to these woes, Yemen is starving because it has become a site for multiple proxy wars — the Shia-based Sadah uprising from the north-west, a South Yemen uprising (based around the territory of the old Soviet-era Marxist state), and the Arab Spring general insurgency against the 30-plus-year reign of President Salleh, and last but not least a proxy war between al-Qaeda and US drone attacks.
The result is a country in which substantial networks not merely of trade, but also of inter-family support and charity have broken down, making the usual transfer between rich and poor all the more difficult, such as it occurs. To be fair, it has also been pointed out that the production of the intoxicant herb “khat” dominates agricultural production without providing any nourishment (though it also acts as an appetite suppressant), to the detriment of food production and household budgets.
But above all and beyond all this is the way in which Yemen is trapped in a global commodity system, with steadily rising prices for basic staple foods (of which Yemen imports 90%), and for diesel oil, which is used to pump water. At this point, with diesel oil unaffordable, many families are reliant on charity for a continued supply of water.
This crippling gap has led Oxfam to approach the problem in a simple way — they’re simply giving money to the poor, so that they can shop at market, and also acquire diesel. But the inevitable result of that will be a further bump in prices as the money swims into the system without expanded production, and the cycle begins again.
The Yemen famine then, is something we will begin to see more and more — a situation in which a poor and precarious country has its price signals swamped by global demand and remorselessly rising prices. With several decades of rising crop yields and low oil prices, now curtailed, it will be the nations who have not managed to get on the development ladder — or the poor parts of those who have — that will pay for the prosperity being enjoyed by a booming global urban and industrial class. In that case, the price signal becomes not a carrier of information, but a barrier to it, a la Sen — it tells us nothing about what is really required to be done, within any ethical system worthy of the name.
That story won’t be told in even the most searching reports on this famine, or the next, in the next place. We have come a long way from famine as an act of God, but we are not yet ready to recognise it as a product of global markets, or our role within it.
Thursday, September 11, 2014
A Look Back at the Space Shuttle
DP: What do you feel as you see the shuttle program winding down?
WG: I feel a little sadness, a little bit, because I know what we can continue to keep doing with this shuttle. It would be nice if that other program was coming along a little bit faster, and we could kind of roll right from this program to the next one.
But I think we can still use that same work force to re-tool, build solid plans and then kind of get ready to go move forward.
The Apollo astronauts said that, basically by going to the moon, we learned more about the earth than we did by staying here. And those first images from the surface of the moon, of the earthrise, seeing the earth as a sphere, with this thin atmosphere, really pushes how fragile our world is, and how small our world is.
By continuing to push the technology envelope, we really learn a lot more about what’s really happening here on the earth.
DP: The space shuttle that we use to get to the space station is now retired. So how are we gonna get back and forth now?
WG: We’re gonna use the Soyuz spacecraft, which we’ve been actually using for crew rotations for about the last two years. We’ve focused the shuttle on doing the assembly activities.
DP: We rent space on the Russian aircraft?
WG: Yep. Our crews are trained in Russia to operate and help them fly the spacecraft.
DP: And doesn’t that bother anyone? I mean, doesn’t that make us sort of second-class space citizens?
WG: I don’t really look at it that way. Because if you look at the space station, it’s really an international facility. So there are Russian modules. There’s also a Japanese module. The European space agency has another module. And the U.S. has a large research facility. We provide power to the Russian side—our solar rays generate power, and provide it to the Russian side. And they do propulsion for us on the space station.
So when you ask me about transportation, it’s not different than all these other dependencies I have already. We are truly an international team. It’s not competition like it was before, where we’re gonna beat the Russians, or we’re gonna beat the Chinese.
There’s a control center in Moscow, a control center in Houston, a control center in Japan, and also in Europe. And we all work together to keep this space station flying, and operating.