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Wednesday, February 4, 2009

A new historic physics record has been set by scientists for exceedingly small writing, opening a new door to computing‘s future. Stanford University physicists have claimed to have written the letters “SU” at sub-atomic size.

Graduate students Christopher Moon, Laila Mattos, Brian Foster and Gabriel Zeltzer, under the direction of assistant professor of physics Hari Manoharan, have produced the world’s smallest lettering, which is approximately 1.5 nanometres tall, using a molecular projector, called Scanning Tunneling Microscope (STM) to push individual carbon monoxide molecules on a copper or silver sheet surface, based on interference of electron energy states.

A nanometre (Greek: ?????, nanos, dwarf; ?????, metr?, count) is a unit of length in the metric system, equal to one billionth of a metre (i.e., 10^-9 m or one millionth of a millimetre), and also equals ten Ångström, an internationally recognized non-SI unit of length. It is often associated with the field of nanotechnology.

“We miniaturised their size so drastically that we ended up with the smallest writing in history,” said Manoharan. “S” and “U,” the two letters in honor of their employer have been reduced so tiny in nanoimprint that if used to print out 32 volumes of an Encyclopedia, 2,000 times, the contents would easily fit on a pinhead.

In the world of downsizing, nanoscribes Manoharan and Moon have proven that information, if reduced in size smaller than an atom, can be stored in more compact form than previously thought. In computing jargon, small sizing results to greater speed and better computer data storage.

“Writing really small has a long history. We wondered: What are the limits? How far can you go? Because materials are made of atoms, it was always believed that if you continue scaling down, you’d end up at that fundamental limit. You’d hit a wall,” said Manoharan.

In writing the letters, the Stanford team utilized an electron‘s unique feature of “pinball table for electrons” — its ability to bounce between different quantum states. In the vibration-proof basement lab of Stanford’s Varian Physics Building, the physicists used a Scanning tunneling microscope in encoding the “S” and “U” within the patterns formed by the electron’s activity, called wave function, arranging carbon monoxide molecules in a very specific pattern on a copper or silver sheet surface.

“Imagine [the copper as] a very shallow pool of water into which we put some rocks [the carbon monoxide molecules]. The water waves scatter and interfere off the rocks, making well defined standing wave patterns,” Manoharan noted. If the “rocks” are placed just right, then the shapes of the waves will form any letters in the alphabet, the researchers said. They used the quantum properties of electrons, rather than photons, as their source of illumination.

According to the study, the atoms were ordered in a circular fashion, with a hole in the middle. A flow of electrons was thereafter fired at the copper support, which resulted into a ripple effect in between the existing atoms. These were pushed aside, and a holographic projection of the letters “SU” became visible in the space between them. “What we did is show that the atom is not the limit — that you can go below that,” Manoharan said.

“It’s difficult to properly express the size of their stacked S and U, but the equivalent would be 0.3 nanometres. This is sufficiently small that you could copy out the Encyclopaedia Britannica on the head of a pin not just once, but thousands of times over,” Manoharan and his nanohologram collaborator Christopher Moon explained.

The team has also shown the salient features of the holographic principle, a property of quantum gravity theories which resolves the black hole information paradox within string theory. They stacked “S” and the “U” – two layers, or pages, of information — within the hologram.

The team stressed their discovery was concentrating electrons in space, in essence, a wire, hoping such a structure could be used to wire together a super-fast quantum computer in the future. In essence, “these electron patterns can act as holograms, that pack information into subatomic spaces, which could one day lead to unlimited information storage,” the study states.

The “Conclusion” of the Stanford article goes as follows:

The team is not the first to design or print small letters, as attempts have been made since as early as 1960. In December 1959, Nobel Prize-winning physicist Richard Feynman, who delivered his now-legendary lecture entitled “There’s Plenty of Room at the Bottom,” promised new opportunities for those who “thought small.”

Feynman was an American physicist known for the path integral formulation of quantum mechanics, the theory of quantum electrodynamics and the physics of the superfluidity of supercooled liquid helium, as well as work in particle physics (he proposed the parton model).

Feynman offered two challenges at the annual meeting of the American Physical Society, held that year in Caltech, offering a $1000 prize to the first person to solve each of them. Both challenges involved nanotechnology, and the first prize was won by William McLellan, who solved the first. The first problem required someone to build a working electric motor that would fit inside a cube ¹/₆₄ inches on each side. McLellan achieved this feat by November 1960 with his 250-microgram 2000-rpm motor consisting of 13 separate parts.

In 1985, the prize for the second challenge was claimed by Stanford Tom Newman, who, working with electrical engineering professor Fabian Pease, used electron lithography. He wrote or engraved the first page of Charles Dickens’ A Tale of Two Cities, at the required scale, on the head of a pin, with a beam of electrons. The main problem he had before he could claim the prize was finding the text after he had written it; the head of the pin was a huge empty space compared with the text inscribed on it. Such small print could only be read with an electron microscope.

In 1989, however, Stanford lost its record, when Donald Eigler and Erhard Schweizer, scientists at IBM’s Almaden Research Center in San Jose were the first to position or manipulate 35 individual atoms of xenon one at a time to form the letters I, B and M using a STM. The atoms were pushed on the surface of the nickel to create letters 5nm tall.

In 1991, Japanese researchers managed to chisel 1.5 nm-tall characters onto a molybdenum disulphide crystal, using the same STM method. Hitachi, at that time, set the record for the smallest microscopic calligraphy ever designed. The Stanford effort failed to surpass the feat, but it, however, introduced a novel technique. Having equaled Hitachi’s record, the Stanford team went a step further. They used a holographic variation on the IBM technique, for instead of fixing the letters onto a support, the new method created them holographically.

In the scientific breakthrough, the Stanford team has now claimed they have written the smallest letters ever – assembled from subatomic-sized bits as small as 0.3 nanometers, or roughly one third of a billionth of a meter. The new super-mini letters created are 40 times smaller than the original effort and more than four times smaller than the IBM initials, states the paper Quantum holographic encoding in a two-dimensional electron gas, published online in the journal Nature Nanotechnology. The new sub-atomic size letters are around a third of the size of the atomic ones created by Eigler and Schweizer at IBM.

A subatomic particle is an elementary or composite particle smaller than an atom. Particle physics and nuclear physics are concerned with the study of these particles, their interactions, and non-atomic matter. Subatomic particles include the atomic constituents electrons, protons, and neutrons. Protons and neutrons are composite particles, consisting of quarks.

“Everyone can look around and see the growing amount of information we deal with on a daily basis. All that knowledge is out there. For society to move forward, we need a better way to process it, and store it more densely,” Manoharan said. “Although these projections are stable — they’ll last as long as none of the carbon dioxide molecules move — this technique is unlikely to revolutionize storage, as it’s currently a bit too challenging to determine and create the appropriate pattern of molecules to create a desired hologram,” the authors cautioned. Nevertheless, they suggest that “the practical limits of both the technique and the data density it enables merit further research.”

In 2000, it was Hari Manoharan, Christopher Lutz and Donald Eigler who first experimentally observed quantum mirage at the IBM Almaden Research Center in San Jose, California. In physics, a quantum mirage is a peculiar result in quantum chaos. Their study in a paper published in Nature, states they demonstrated that the Kondo resonance signature of a magnetic adatom located at one focus of an elliptically shaped quantum corral could be projected to, and made large at the other focus of the corral.

Monday, December 3, 2007

At Thanksgiving dinner David Shankbone told his white middle class family that he was to interview Reverend Al Sharpton that Saturday. The announcement caused an impassioned discussion about the civil rights leader’s work, the problems facing the black community and whether Sharpton helps or hurts his cause. Opinion was divided. “He’s an opportunist.” “He only stirs things up.” “Why do I always see his face when there’s a problem?”

Shankbone went to the National Action Network’s headquarters in Harlem with this Thanksgiving discussion to inform the conversation. Below is his interview with Al Sharpton on everything from Tawana Brawley, his purported feud with Barack Obama, criticism by influential African Americans such as Clarence Page, his experience running for President, to how he never expected he would see fifty (he is now 53). “People would say to me, ‘Now that I hear you, even if I disagree with you I don’t think you’re as bad as I thought,'” said Sharpton. “I would say, ‘Let me ask you a question: what was “bad as you thought”?’ And they couldn’t say. They don’t know why they think you’re bad, they just know you’re supposed to be bad because the right wing tells them you’re bad.”

Friday, October 10, 2008

Canadian authorities report that a Chinese restaurant in the Chinatown area of Toronto has been closed down by the Board of Public Health for the second time yesterday after investigators saw a video and pictures of a rat in the window.

The photos were posted on websites and local TV. Witnesses around the area report that they have seen rats crossing the streets, often going in and out of the restaurant.

Jesse Ship, arts editor of Format Magazine, filmed the picture of the rat while on his way to work. “I was just walking past Happy Seven [the restaurant] today on Spadina and snagged images of a rat in the window on my cell phone, sitting right next to the health inspector sign,” he said, commenting on his find. “The restaurant wasn’t open yet.”

The video of the rat in the restaurant, which according to blogTO, is one of the most liked Chinese restaurants in Toronto, was then posted on the video sharing site Vimeo four days ago. It took a couple of days after the publication of the video to attract widespread press attention.

Until the video of the rat was made public, officials believed that the restaurant was safe, giving it a pass for food safety. The restaurant will be given permission to reopen once professionals are hired to remove the rats, and inspectors are satisfied that they have been removed.

Inspectors have closed 41 restaurants in Toronto this year, six of which have been in the same area as Happy Seven. Of the restaurants in the same area, half have been for rat problems.

Sunday, April 27, 2008

Police have arrested the owner of a mattress factory in Hay Hassini, Casablanca, Morocco which burned down in a disaster that claimed 55 lives. His son, who was the factory’s manager, was also arrested.

Those killed — 35 of whom were women — were trapped inside by locked fire exits, which were barricaded to stop theft during working hours. “The people who died were either asphyxiated or burned,” commented a firefighter. 17 were wounded. Moustapha Taouil of the Casablanca civil protection service said the blaze was triggered by an inadequatly maintained electric saw on the ground floor. The initial fire quickly engulfed all four storeys of the building.

The Rosamor factory was clearly operating unsafely, officials said. “It’s a building with a ground floor and three upper floors specialising in making furniture, therefore there were highly inflammable products,” said Taouil. “We confirmed during our examination that the owners of the premises failed to respect legal requirements for this kind of industry including staff training… the owner in contravention of the law, locked staff inside the plant apparently to prevent theft of raw material. It was this that prevented them getting out. The fire was caused by lack of proper maintenance of certain machines and electrical installations.” He said a short circuit on the ground floor, which was filled with power saws, triggered the disaster.

As a result of the investigatons, “The plant’s owner, Adil Moufarreh, and his son Abdelali Moufarreh, who was the manager, have been taken into custody after having been questioned by police,” said an official.

28-year-old factory employee Fadila Khadija said “There was no emergency exit, the extinguishers were empty and the working conditions were difficult.” One source said that windows were also unusable as they were covered with iron bars. 20-year-old survivor Omar Elaaz said “I was working on the first floor as an upholsterer. The smoke came up from the ground floor where the foam rubber, wood and glue are stored. I used a gas bottle to break the wire mesh that protects every window.” 31-year-old upholsterer Hakim Hakki told of his own lucky escape and its effect on him from hospital: “I jumped from the third floor with four other colleagues while the women, who didn’t dare to follow us, perished in the inferno. God saved me but I’ll never forget those who died.”

The father of deceased 19-year-old Abdelazziz Darif said his son was paid 250 dirhams (20 euro/31 US dollars) per week and did not have social insurance.

Tuesday, July 13, 2010

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The Afghanistan Rights Monitor (ARM), an Afghan human-rights group, stated yesterday that 2010 was the worst year in terms of violence for the country since US-led troops occupied the country in 2001.

The ARM says that civilian deaths have risen and that Taliban insurgents have not been defeated despite a surge in troops in Afghanistan. “In terms of insecurity, 2010 has been the worst year since the demise of the Taliban regime in late 2001. Not only have the number of security incidents increased, the space and depth of the insurgency and counter-insurgency-related violence have maximised dramatically,” the ARM said.

ARM’s figures state that over 1,074 civilians were killed and over 1,500 wounded in war violence in the first half of this year, an slight increase over 1,059 deaths in the same time period in 2009. “Up to 1,200 security incidents were recorded in June, the highest number of incidents compared to any month since 2002,” the ARM commented.

According to the ARM, over half of civilian deaths in the first six months of this year were caused by Taliban insurgents that showed “little or no respect for the safety and protection of non-combatants in their armed rebellion against the government and its foreign supporters.” The group also said that the second highest cause of civilian deaths were suicide attacks by the Taliban. The suicide attacks killed 127 people. Also, the ARM reported that a reduction of US and NATO (North Atlantic Treaty Organization) air strikes reduced their share of civilians killed. The air strike reduction had been ordered by the former commander of foreign forces, General Stanley McChrystal, who was fired by US president Barack Obama for making rude comments about top White House government officials.

In December of last year, US president Barack Obama sent an additional 30,000 soldiers into the country in an effort to halt the Taliban’s influence in the region. However, the ARM says in its mid-year report, titled “Civilian Casualties of Conflict”, that the move failed to have any lasting effect, and that “the insurgency has become more resilient, multi-structured and deadly”.

According to the ARM, most of the injuries and deaths were attributed homemade bombs — otherwise known as improvised explosive devices. These bombs are considered the Taliban’s main weapon.

140,000 soldiers from both the US and NATO are stationed in Afghanistan; another 10,000 are scheduled to enter the landlocked Asian country in the next few weeks. Over 350 US and NATO troops have been killed so far this year, compared with 520 last year. Over 30 troops have been killed in the first 12 days of July.

Wednesday, October 22, 2008

Monday saw the latest edition of the vetted version of Wikipedia, which is aimed at educational use, go quietly online. The extensively revised version covers over five thousand topics, targeting the eight to seventeen years age group. Partnerships with the Shuttleworth Foundation and the Hole in the Wall project will see it distributed in South Africa and India as well as copies being available globally via the offices of SOS Children UK’s umbrella organisation, SOS Kinderdorf worldwide.

First launched in 2006 as a 4,000 article edition, the extract of Wikipedia has employed hi-tech distribution methods, as well as offering a website version which has steadily climbed up in ranking to above other reviewed Wikipedia rivals and copies; the 2007 version was available on the BitTorrent peer to peer network to keep distribution costs down and was equivalent to a fifteen-volume printed encyclopedia. Monday’s release is compared to a twenty-volume print edition.

Key to the process for selecting articles is the English National Curriculum and similar educational standards around the world. The initial vision was to bring this wealth of knowledge to schools where access to the Internet was poor or unavailable, but copies of Wikipedia for Schools can be found on many first world school intranets and web servers. Among the compelling reasons to adopt the project are the vetting and additional study materials which overcome the oft-publicised concerns many educators have with the million article plus Wikipedia that anyone can edit.

In today’s press release announcing the launch, Wikimedia Foundation Executive Director Sue Gardner expressed delight at seeing the project bring out a new version, “Our goal is to make Wikipedia accessible to as many people as possible around the world, and SOS Children is a great partner that helps us make that happen. Wikipedia is released under a free content license so that individuals and institutions can easily adapt, reuse and customize its content: we encourage others, like SOS Children, to do exactly that.”

Running 192 schools in the developing world, SOS Children sees Wikipedia for Schools as a key piece in fulfilling the educational aspect of their mission. SOS Children’s Chairwoman, Mary Cockcroft gave us an introduction and, a Wikipedia administrator himself, the charity’s CEO Andrew Cates spoke to Wikinews at length about the project.

You are part of SOS-Kinderdorf International, can you explain a little about how this works in terms of distributing funds raised in the UK and involving UK citizens in work outside the country?

Mary Cockcroft: SOS Children[‘s Villages] is a “club” of member charities in 130 countries helping orphans and vulnerable children. The club elects SOS-Kinderdorf International as secretary. SOS is a large organisation whose members in aggregate turned over $1bn in 2007, and whose projects include owning and running 192 schools and family-based care for 70,000 children. However much of these funds are raised locally, with for example the member charities in each of India, Pakistan and South Africa raise considerably more funds in their own country than SOS UK does from the UK. Nonetheless SOS Children UK principally raises funds to finance projects in the developing world, and has only financially small projects in the UK (such as the Schools Wikipedia, which is very low cost because of extensive use of volunteers). This year we expect about 80% of our UK income will leave the UK for overseas SOS associations, and some of the remaining 20% will pay for project oversight. We do not spend money in the UK on Direct Mail or TV advertising. Our UK office is involved in overseeing projects we finance and a small number of high-skilled volunteers from the UK help overseas. However around 98% of SOS staff worldwide are local nationals, as are most volunteers.

((WN)) How much work does the UK charity actually carry out within the home country? Are there failings within the government system for orphans and other needy children that you feel obliged to remedy?

MC: We are deeply unhappy about the situation of children in out-of-home care in the UK. However our care model of 168 hour-a-week resident mothers does not fit with the UK philosophy for children without parental care. Internationally SOS always has a policy of sharing best practice and we are working to improve understanding of our way of working, which appears to us to have far better outcomes than the existing one in the UK. Ultimately though the legal responsibility for these children lies with government and we cannot remedy anything without their invitation.

((WN)) Who first came up with the idea of doing a vetted Wikipedia extract? What was the impetus? Was it more for the developing world than first world?

Andrew Cates: I honestly cannot remember who first suggested it, but it came from somewhere in the Wikipedia community rather than from the charity. The original product was very much pitched at the developing world where the Internet is only available if at all over an expensive phone line. I worked in West Africa 1993-1996 and I know well at how thirsty for knowledge people are and how ingenious they will be in overcoming technical obstacles if the need for infrastructure is removed.

((WN)) In reading past year’s announcements there’s some pride in the project being picked up and used in the first world, was this expected or a pleasant surprise?

AC: It was a pleasant surprise. I don’t think we had realised what the barriers schools faced in using the main Wikipedia were. It isn’t just pupils posting material about teachers or meeting strangers: the “Random Article” button on every page could potentially deliver an article on hardcore porn. We had already started when discussion broke on banning Wikipedia from classrooms and I am sure we benefited from it.

((WN)) Can you give an outline of the selection and vetting process? Is it primarily Wikipedians working on this, or are people from the educational establishment brought in?

AC: It was a long and painful process, even with a really good database system. Articles were taken into the proposal funnel from three main sources: direct proposals for inclusion from Wikipedians, lists which came from the Release Version team and proposals drawn up from working through National Curriculum subjects by SOS volunteers. In a few cases where we felt articles were missing we asked the community to write them (e.g. Portal:Early Modern Britain, which is a curriculum subject, was kindly written just for us): These “proposals” were then looked at by mainly SOS volunteers (some onwiki, some offline). Our offices are in the middle of Cambridge and we get high quality volunteers, who skim read each article and then compared two versions from the article history by credible WP editors a significant period apart (this picks up most graffiti vandalism which runs at about 3% of articles). Once they had identified a “best” version they marked any sections or text strings for deletion (sections which were just a list of links to other articles not included, empty sections, sex scandals etc). A substantial sample of each volunteers work was then doubled checked for quality by one of two office staff (of whom I was one). We then have a script which does some automated removals and clean ups. Once we had a selection we posted it to relevant wikiprojects and a few “experts” and got any extra steers.

((WN)) Will you be making use of BitTorrent for distribution again this year? Was it a success in 2007?

AC: BitTorrent was a bit disappointing in that it got us the only substantial criticisms we received online. A lot of people find it too much effort to use. However for the period we offered a straight http: download we had huge problems with spiders eating vast bandwidth (the file is 3.5G: a few thousand rogue spider downloads and it starts to hurt). As per last year therefore our main two channels will be free download by BitTorrent and mailing the DVDs free all over the world. At a pinch we will (as before) put straight copies up for individuals who cannot get it any other way, and we have some copies on memory sticks for on distributors.

((WN)) Is it your opinion that the UK Government should be encouraging the adoption of projects like this as mainstream educational resources?

AC: Clearly yes. We have had a very enthusiastic reaction from schools and the teaching community. We think every school should have an intranet copy. We expect the Government to catch on in a few years. That is not to say that Wikipedia is as good as resources developed by teachers for teachers such as lesson plans etc. but it is a fantastic resource.

((WN)) You’re a Wikipedia administrator, all too often a thankless task. What prompted you to get involved in the first place? What are the most notable highs and lows of your involvement with the project?

AC: Funnily the thing I have found most amazing about Wikipedia is not widely discussed, which is the effect of Wikipedia policies on new editors. I have seen countless extreme POV new editors, who come in and try to get their opinions included slowly learn not only that there are other opinions to consider but that elements of their own opinion which are not well founded. Watching someone arrive often (on pages on religions for example) full of condemnation for others, gradually become understanding and diplomatic is one of the biggest buzzes there is. The downside though is where correcting things which are wrong is too painfully slow because you need to find sources. I was a post-doc at Cambridge University in combustion and I know the article on Bunsen burners has several really significant errors concerning the flame structure and flow structure. But sadly I cannot correct it because I am still looking around for a reliable source.

((WN)) Do you believe schools should encourage students to get involved contributing to the editable version of Wikipedia? Does SOS Children encourage those who are multilingual to work on non-English versions?

AC: I think older students have a lot to learn from becoming involved in editing Wikipedia.

((WN)) To close, is there anything you’d like to add to encourage use of Wikipedia for Schools, or to persuade educators to gain a better understanding of Wikipedia?

AC: I would encourage people to feed back to the project online or via the charity. The Wikipedia community set out to help educate the world and are broadly incredibly well motivated to help. As soon as we understand what can be done to improve things people are already on the task.

((WN)) Thank you for your time.

Tuesday, April 3, 2007

A French Train à Grande Vitesse (High-Speed Train or TGV) has smashed the world record for a train on conventional rails by a big margin, reaching 574.8km/h (356mph) The TGV travelled over 59.8 km/h (36 mph) faster than its previous record of 515 km/h (320 mph)

The record attempt by a modified TGV took place on a track between Paris and the eastern city of Strasbourg. However, this is not the fastest train speed. A Japanese Maglev (Magnetive Levitation Train) reached a top speed of 581km/h (361mph) in 2003. The TGV made history at 13:14 CEST (11:14 UTC). The TGV had been modfied and was called V150 – a TGV with larger wheels than usual and two engines driving three double-decker cars. The vehicle’s horsepower was 25,000.

Reporters said the three train drivers were seen grinning on French TV after they realised they had broken the record. The TGV travelled almost as fast as a World War II Spitfire fighter at top speed. Even the electrical tension in the overhead cable was increased 6000 volts from 25,000 volts to 31,000 for the record attempt.

“We saw the countryside go by a little faster than we did during the tests,” engineer Eric Pieczac said.

“Everything went very well. There are about 10,000 engineers who would want to be in my place,” Mr Pieczac said. “It makes me very happy, a mixed feeling of pride and honour to be able to reach this speed.” Since their introduction in 1981, TGVs generally travel at about 300km/h (187.5 mph) however, on the recently opened Paris-Strasbourg LGV (Ligne à Grande Vitesse or High-Speed line) trains will travel at 320 km/h (200 mph)

SNCF and Alstom – the TGV’s manufacturer – have said that the record test was performed to see how a TGV would react in extreme conditions – conditions that cannot be performed in a laboratory.

After the record was broken, French President Jacques Chirac conveyed his congratulations on “this new proof of the excellence of the French rail industry.” The President also said that “Economically efficient and respectful of the environment, the TGV is a major asset in efforts to ensure sustainable development in transport

“What is important for us today is to prove that the TGV technology which was invented in France 30 years ago is a technology for the future,” said Guillaume Pepy

Alstom plans to increase TGV sales abroad, where it is competing with high-speed trains such as the Japanese Shinkansen and the German ICE. Currently, nations of the Far East such as China, South Korea, Japan and Taiwan are the “top” customers for high-speed trains. Agence France-Presse said that a high-speed rail link in between Los Angeles and San Francisco, California was being looked into.