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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.

Thursday, November 8, 2007

The sale of the BBC subsidiary BBC Resources Ltd., has hit a hurdle after it emerged that the BBC could be left with a loss of up to £15 million on the deal. The cost of transferring the pensions of BBC Resources staff from the BBC pension scheme to its new owners could be up to £50 million according to a Guardian Newspaper report.

Managers from the division will meet with union representatives from BECTU on Monday to discuss this and related sale issues. BECTU general secretary, Gerry Morrissey is quoted as saying: “If the BBC gets less than £50 million for BBC Resources then how can it fulfil [sic] its duty of care to licence fee payers?”

It is believed that the BBC had hoped that a surplus in its pension fund could be used to bridge the possible £50 million gap — but the trustees of the fund have said “no”. A BBC source said: “This is being discussed at the highest level”.

Since April 2004 members of the BBC pension scheme have seen their contributions into it increase regularly, the BBC — like many other employers — having reduced its contribution (to 4.5% of payroll) over a ten year period when the stock market was booming in the 1990s.

The Guardian is seen as a reliable source on BBC matters, having reported the proposed sale of BBC Television Centre back in January 2007, with the formal announcement finally being made by BBC Director General Mark Thompson on October 18, 2007.

The Resources business-to-business unit was formed in 1998 and operates television studios, post-production and outside broadcast facilities for it’s parent share-holding company, the BBC. It does not own any studios or premises, its assets being staff and equipment.

Advertised for sale on 16th August in the Financial Times, The Times and Broadcast and last year making profits of £5.2 million with a revenue of £126 million, the disposal — led by Ernst & Young — invited expressions of interest for the whole division or for each of its three operations separately. The BBC has yet to release the names of the short-listed companies.

BBC Resources was the first of the BBC’s commercial business-to-business divisions to be set up as a limited company and will be the last to be sold, the BBC having previously divested itself of BBC Technology and BBC Broadcast — BBC Worldwide, formerly BBC Enterprises, will remain in-house as it earns revenue from the archive, media and licensing of products — in the year to 31 March 2007 Worldwide had a turnover of £810.4 million, generating profits of £111 million.

The BBC wants to use any money raised to be put into international commercial expansion and content, most probably through Worldwide.

It had been intended to float Resources back in 2005, but this was postponed for two years following strike action and ACAS talks in June 2005 — the BBC giving an undertaking that there would be no preparations made to sell the company until January 2007, and no sale allowed before July of this year. The current time-scale would see its disposal by the end of the current financial year in March 2008.

Published:Wednesday, September 7, 2005Updated:Saturday, September 10, 2005 (Travolta, Preston, Moore, Stones, Three Doors Down, Johnson, Smith)

After Hurricane Katrina passed across the United States, various artists and media stars have leapt at a call to action.

John Travolta and wife Kelly Preston flew his private plane to deliver a load of supplies and tetanus vaccine to Baton Rouge and New Orleans. Part of a Scientology project which has been using their non-massage “assists”, in an interview Preston mentioned that “auditing” had also been performed on victims.

Kevin Smith is holding an online auction on his Web site.

Sean Penn actually went to Louisiana. After loading down a small boat with his entourage, it was discovered one of them had neglected to seal a hole in the bottom. Penn was wearing a white vest rather than a life vest while bailing. After the motor wouldn’t start, the crew paddled down a flooded New Orleans street. Bystanders jeered at whether any victims could fit aboard the crowded craft. No report on rescue stunts. Local authorities had previously been criticized for not allowing volunteer boaters in to help.

Morgan Freeman, whose home fared well, is organizing an online auction of celebrity items at charityfolks.com, to benefit the American Red Cross Disaster Relief Fund.

Curt Schilling opened his home to a family of nine driven out of their New Orleans home. The Schilling family will provide housing for the Fields for a year while their home in New Orleans is rebuilt and repaired.

Some celebrities “graced” disaster zones with their presence in the days following Katrina.

Singer Macy Gray and television personality Phil McGraw visited Houston’s Astrodome.

Celebrities visiting New Orleans include Michael Moore (opposite side of lake), singer Harry Connick, Jr., CNN’s Anderson Cooper, actor Jamie Foxx, singer Faith Hill, actor Matthew McConaughey, singer Lisa Marie Presley, comedian Chris Rock, and The Oprah Winfrey Show contributor Lisa Ling and interior decorator Nate Berkus.

Oprah Winfrey visited New Orleans, Houston, and Mississippi.

Tuesday, August 6, 2013

This past Sunday, Illinois Governor Pat Quinn signed into law a bill known as “Rocky’s Law” that requires Illinois high schools, through the local school district, to buy catastrophic injury insurance up to US$3 million or medical costs for up to five years, whichever one comes first, that covers student athletes. The insurance must cover student athletes while they are competing.

The legislation was named after Rasul “Rocky” Clark. In 2000, the Eisenhower High School football player became paralyzed from the waist down as a result of a tackle during a game. His school based health insurance covered the costs of his medical treatment. A legislator sponsoring the bill noted that the need for this type of insurance is rare. Clark’s mother attended the legislation signing. Her son died last year.

Before parents can claim money from school insurance, they first must pay out US$50,000. Schools have until January 1, 2014 to comply with the law. Schools cannot charge students more than US$5 to defray the cost of insurance. If a school district already requires student to be covered through private health insurance, they are exempted from this law.

Sunday, May 24, 2009

The Saskatoon Health Region in Saskatchewan, Canada recently discovered a fax machine problem which had not relayed almost 1,500 X-rays, Computed tomography (CT) and Magnetic resonance imaging (MRI) scans, ultrasounds, and other medical imaging test results to doctors.

The fax machine is part of the automated Radiology Information System. An audit revealed that medical diagnostic tests involving results dating back a decade have been affected by the broken fax machine.

On May 6, a doctor called the health region officials seeking follow up on a patient’s report. Staff who delved into it, found that the report was not sent from the system.

Now, two weeks later, this same patient has still not been contacted by the health region.

“It has taken some time to work with the patient’s physician. That was important — to get more information and more detail because we want that patient’s physician to be involved in the discussion with the patient,” Dr. David Poulin, vice-president of medical affairs for The Saskatoon Health Region, said. “This is a system error and that’s just what it was — an error. This doesn’t reflect in any way on the quality of work regional staff have done and continue to do.”

An internal review revealed that, of 2.2 million diagnostic tests performed, at least 1,380 had not been sent out by the malfunctioning fax machine.

The health region will embark on contacting each of the 1,380 patients and their physicians to make sure that the results have been received and if any health care was compromised.

Patients can also contact the health region via a newly set up hotline to make enquiries.

“We think it would actually be good practice if physician offices could have a system to check whether they have received important reports,” said Poulin, “The common practice appears to be in many doctors’ offices, particularly family physician offices, that they don’t respond to the report until it arrives. So, they basically are waiting for the report to arrive in their office by fax and it’s at that point that they look at it and decide what action to take.”

City Hospital, St. Paul’s Hospital and Royal University Hospital were the three city hospitals affected. Saskatoon has a population of roughly 233,923, and the hospitals also serve the surrounding rural areas.

Ironically the faulty fax machine was discovered the same week that provincial medical officials began to review approximately 70,000 radiology tests conducted in Yorkton. Officials there doubt the competence of the physician who first interpreted the radiology results.

Friday, January 21, 2022

As reported by the state-operated media outlet Voice of Korea on January 20, the North Korean government has issued a decree granting amnesty to those found guilty of “crimes against the country and the people”. The decree was instituted to mark former leaders Kim Il-sung and Kim Jong-il’s upcoming birth anniversaries.

According to Voice of Korea, the decree was issued by the Standing Committee of the Supreme People’s Assembly as decree No. 820. The decree will be effective as of January 30. The Supreme People’s Assembly is “the highest organ of State power” in the country, as stated in the North Korean constitution.

The birth anniversary of founding leader Kim Il-sung, titled the “Day of the Sun”, is held yearly on April 15, and the birth anniversary of second leader Kim Jong-il is held on February 16 under the name of “Day of the Shining Star”. Both dates serve as important holidays in the North, with grandiose celebrations having taken place in previous years.

According to an article published by The Korea Herald, this pardoning is a way “to promote social unity amid economic hardships” and “to boost loyalty for the leader [Kim Jong-un]”, linking COVID-19 border closures to the North’s dire economic situation.