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Monday, September 17, 2012

IBM scientists take image of atomic bonds

How’s this for a close-up: an image that can differentiate between the different chemical bonds in an individual molecule? That’s what IBM’s Zurich research lab is claiming in a paper published in Science.

The paywalled piece is titled with the pizazz typical of science papers – Bond-Order Discrimination by Atomic Force Microscopy – but it’s worth browsing because the image is so cool.


IBM's image of a nanographene molecule: the bonds at the centre involve more electrons and are shorter than those at the edge. Image: IBM

Created with an atomic force microscope (AFM), the image shows a nanographene molecule and clearly visualises the bonds in the molecule, showing different lengths of bonds. The scientists say the imaging technique will help them characterise graphene, the wonderstuff of developments in electronics.

"This can increase basic understanding at the level of individual molecules ... in particular, the relaxation of bonds around defects in graphene as well as the changing of bonds in chemical reactions and in excited states were observed", IBM says.

To quote IBM scientist Leo Gross from its announcement: "We found two different contrast mechanisms to distinguish bonds. The first one is based on small differences in the force measured above the bonds. We expected this kind of contrast but it was a challenge to resolve.”

"The second contrast mechanism really came as a surprise: bonds appeared with different lengths in AFM measurements. With the help of ab initio calculations we found that the tilting of the carbon monoxide molecule at the tip apex is the cause of this contrast.”

The AFM uses a single carbon monoxide molecule as the sensing tip. The molecule oscillates above the sample to measure the forces between the CO molecule and the sample to create the image.

Update: The original version of this story identified the image as showing C60. That has now been corrected. IBM imaged both nanographene and C60 "buckyballs". There are more images on Flickr, here

By Richard Chirgwin

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Sunday, September 16, 2012

China announces geographic codes for Diaoyu Islands baseline to UN

BEIJING, Sept. 16 (Xinhua) -- Releasing the geographic coordinates of Diaoyu Island and its affiliated islets marks China's latest move to affirm its sovereignty and administrative jurisdiction over the islands, according to a maritime expert.


China has had the islands under continuous surveillance for a long time, said Jia Yu, vice director of the China Institute for Marine Affairs attached to the State Oceanic Administration (SOA), in an interview with Xinhua on Saturday.

The SOA announced the exact longitude and latitude of Diaoyu Island and 70 of its affiliated islets while publishing location maps, three-dimension effect graphs and sketch maps for the islands on Saturday.


Since 2009, the SOA carried out a general survey of all Chinese islands, including the Diaoyu Islands, and announced their standard names and locations in March, Jia said.


"Diaoyu Island and its affiliated islets have been an inherent part of Chinese territory since ancient times and China has indisputable sovereignty over the islands," Jia said.


Announcing the geographic codes is an important step for the country to exercise its administrative jurisdiction over the islands, he said.


"Only the sovereign state and its government can do that and no other nation, organization or individual has the right to do it. Even if they did, the announcement would be invalid," he said.


The move also aims to help the public learn about the islands more vividly through the location maps, three-dimension effect graphs and sketch maps, provided that it remains difficult for the general public to visit the islands, Jia said.


"Through these documents, the country will conduct better surveillance and protection over the islands for future development," Jia added.


On Monday, the Chinese government announced the base points and baselines of the territorial waters of Diaoyu Island and its affiliated islets, as well as the names and coordinates of 17 base points.


Also on Thursday, China's permanent representative to the United Nations Li Baodong met with UN Secretary-General Ban Ki-moon and filed a copy of the Chinese government's Diaoyu Islands baseline announcement with the United Nations.


"The two sets of coordinates are meant to maintain China's sovereignty over the land as well as its adjacent waters," Jia said.



UN receives China announcement on Diaoyu Islands baseline



The United Nations has received a copy of Chinese government’s Diaoyu Islands baseline announcement, submitted by China’s permanent representative to UN, Li Baodong.

A spokesman for UN Secretary-General Ban Ki-moon says the document will be dealt with appropriately on the basis of the UN Convention on the Law of the Sea. On Thursday, Li Baodong met with Ban Ki-moon, and filed the copy, officially fulfilling the country’s obligations as stipulated in the UN Convention.

Under the Convention on the Law of the Sea, coastal states are required to deposit with the UN chief charts showing straight baselines and archipelagic baselines, as well as lists of geographical coordinates.

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Baying for blood, again

Nobody wants to have a war with Iran except Israeli premier Binyamin Netanyahu, so it could still happen.

IF a deeply troubling international situation suddenly looks too good to be true, it usually is just that – and so desperately bad as to need looking good.

And so it is with the positions of the permanent members of the UN Security Council (UNSC) over Israel’s push to attack Iran, a situation that can soon become much more desperate.

China and Russia have long resisted the Israel-United States axis’ efforts to recreate West Asia in its own image, or at least to its own preference. The point was driven home when, under cover of “protecting innocents” through a ceasefire and no-fly zone in Libya last year, Western countries openly attacked government forces.

Now that Saddam Hussein’s Iraq and Muammar Gaddafi’s Libya are gone, the only Muslim nation capable of standing up to the axis is Iran. But how to fashion a case against Iran that looks at least half-credible internationally?

On attack mode: If the United States still insists on staying away, without even red lines or deadlines for Iran to conform to, Israel may well go it alone and attack Iran. — EPA
 
Israel, the only nuclear-armed country in the region, does not pretend it has evidence of Iranian plans for nuclear bombs. So its best pretext is that Iran may one day have them, despite Teheran’s repeated assurances that its nuclear energy production and medical research are not a prelude to nuclear armaments.

China and Russia have no desire to see a nuclear-armed Iran either, in fact quite the reverse. Their intelligence services report that there are no grounds to assume that Iran has or even wants to have nuclear weapons.

The conclusion is shared by US and Israeli intelligence, and cited by no less than Israel’s military chief, among others. But that is “only” the pure outlook of professionals and technocrats before getting tweaked by politicians.

Israeli Prime Minister Binyamin Netanyahu seems bent on creating an imploding situation, pushing and pulling to make it want to explode and involve other countries in supporting roles. Chinese and Russian diplomats have consistently kept well clear of it all.

Sensing that Obama’s Washington had lately also been keeping its distance, Netanyahu piled on the pressure for days on end. Then his ultimatum was delivered on Tuesday: that if the US still insists on staying away, without even red lines or deadlines for Iran to conform to, Israel may well go it alone and attack Iran.

And if that happened, Washington could be made to look bad in failing to live up to its God-given mission of protecting the free world. In an election season, those kinds of terms can make a difference, and they did.

News then came the next day that Beijing and Moscow had at last “agreed” to add their weight to Western-Israeli condemnation of Iran’s attitude, if not its actions or policies. That may seem like the hitherto elusive consensus among the UNSC’s permanent five, except that it never was.

After Israel’s quiet ultimatum following long days of hard lobbying, its bottom line finally made Washington scramble – not the fighter jets, but UN diplomats in persuading Beijing and Moscow to swing their support behind an alternative approach pre-empting Israel’s further war cries.

At any rate, the resolution at the IAEA (UN nuclear watchdog) on Thursday would have no binding effect. If diplomatic declarations are mere symbols of policy intentions, then the proposed resolution is the most symbolic of all.

Yet at the most superficial of official levels, Israel also agrees that diplomacy should still be the first option before military action. But there is no denying that Netanyahu is gung-ho on another attack on another Muslim nation, preferably with other countries rather than Israel doing the work.

Walking the tightrope

Iran has no plan or policy for nuclear weapons, much less those weapons themselves. For Netanyahu’s campaign to target Teheran it needed to spread fear and vilification, while official texts could refer only to Iran’s attitude and posturing.

Yet despite all his huffing and puffing, or rather because of them, he is making matters worse for the entire region. Anyone in a less emotional state can see the thin tightrope he is treading.

By seeking to force Iran, a country justly proud of its history and culture, to bow to unreasonable demands, Netanyahu is only making a rebuff from Teheran inevitable. That would in turn force Israel to plummet into war, since it would also not want to lose face.

Then by making clear that the push for war “has to come now” rather than later when Iran may possess nuclear weapons, Netanyahu is confirming to Teheran that nuclear weapons work as a deterrent against foreign attacks. Even if Iran never wanted nuclear weapons before, it would be sorely tempted to seek them now.

One result is that Israeli leaders themselves are divided over an attack on Iran. Its military leaders, President Shimon Peres and Netanyahu’s own Deputy Prime Minister Dan Meridor (in charge of intelligence and nuclear affairs) are among those who disagree with him on the need to attack Iran.

Meanwhile, a top-level US report bearing the seal of more than 30 retired diplomats, admirals, generals and security chiefs advise that a war with Iran will be more painful and costly than the Iraq and Afghan invasions combined.

Previous estimates had found that an attack on Iran would only delay its nuclear programme by several months. This latest report says that a full-scale attack involving aerial bombardment, ground troops, cyberwarfare and a military occupation, among other requirements, would only delay a nuclear programme by several years, not stop it.

However, the likes of Netanyahu are determined to press on regardless. He seems to have calculated that a US election season can give him an edge by pressuring incumbent Obama to lend him unambiguous support.

Iran may also be hoping that public anxieties in the US over jobs and a faltering economy can, in an election season, constrain the urge of US hawks to join Israel. So far Teheran appears to not want to relent by appeasing the doubters.

Nonetheless, the prospect of war is still closer than anyone other than Netanyahu would wish. There are at least five reasons for this.

First, by pushing the option of a military attack to the maximum, Israeli policymakers would be loath to effect a turnaround short of a major Iranian concession. And that would be highly unlikely.

Second, Netanyahu’s primary aim is not the destruction of Iran but key surgical strikes against suspected nuclear sites. He and his advisers may well see this as “doable”, even though the consequences can easily and quickly become unmanageable.

Third, Iran is likely to retaliate in more ways than one, including through forms of asymmetrical warfare. Israel has launched “spot attacks” on Iraq’s and Syria’s installations before and got away with it, but it has never engaged a country as large and powerful as Iran.

Fourth, an attack by Israel, or jointly by Israel and the US, would immediately invite endless rounds of counter-attacks by militant Muslim groups and individuals around the world. These are just some of the consequences that are not clearly foreseeable or controllable.

Fifth, when push comes to shove, both Democratic and Republican candidates in the US presidential election are likely to side with Israel.

Once Netanyahu as Prime Minister sets the country on a war footing, even the naysayers in his own administration will feel the need to acquiesce in the national decision.

Behind The Headlines By Bunn Nagara