Stanford physicists print smallest-ever letters ‘SU’ at subatomic level of 1.5 nanometres tall

Author: Admin  |  Category: Uncategorized

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:

According to theory, a quantum state can encode any amount of information (at zero temperature), requiring only sufficiently high bandwidth and time in which to read it out. In practice, only recently has progress been made towards encoding several bits into the shapes of bosonic single-photon wave functions, which has applications in quantum key distribution. We have experimentally demonstrated that 35 bits can be permanently encoded into a time-independent fermionic state, and that two such states can be simultaneously prepared in the same area of space. We have simulated hundreds of stacked pairs of random 7 times 5-pixel arrays as well as various ideas for pathological bit patterns, and in every case the information was theoretically encodable. In all experimental attempts, extending down to the subatomic regime, the encoding was successful and the data were retrieved at 100% fidelity. We believe the limitations on bit size are approxlambda/4, but surprisingly the information density can be significantly boosted by using higher-energy electrons and stacking multiple pages holographically. Determining the full theoretical and practical limits of this technique—the trade-offs between information content (the number of pages and bits per page), contrast (the number of measurements required per bit to overcome noise), and the number of atoms in the hologram—will involve further work.Quantum holographic encoding in a two-dimensional electron gas, Christopher R. Moon, Laila S. Mattos, Brian K. Foster, Gabriel Zeltzer & Hari C. Manoharan

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.

Anniversary Gifting Is All About Unparalleled Joys}

Author: Admin  |  Category: Performing Arts

Anniversary Gifting is all about Unparalleled Joys

by

flowersngifts24x7Explore E-Gifting on your Anniversary like Never BeforeThere is no dearth of online gift stores that are committed to helping you in this regard. You can expect to Send Anniversary gifts to India without really enduring the hassles associated with traditional shopping getting out of your home, picking a store and eventually a gift and visiting a courier office to send the same. Trust the most reputed ecommerce stores in India to do everything for you and that too without charging you a fortune for the same. However, the merits thus documented above should not ideally lead to an arbitrary selection of an online gift shop offering you access to a host of facilities like same day and midnight delivery of services, competitive price brackets and a wide range of choices. Send Personalised gifts to India but not before going through this primer. Don’t demean the significance of the day of your unison by acting arbitrarily – choosing a shop arbitrarily and picking up a gift in a rush. What is it that your loved one likes? What is it that you think can define your equation with your partner in the best possible fashion? What’s your budget? Does the store have a well categorized inventory to facilitate faster selection of gifts? Do they offer Gifts to India online same day delivery?Are you acting prudently?Securing answer to each and every aforementioned question is important. Right from the choice of the flowers to the way they have been arranged- right from the inclusions in your customised gift pack to the time when you are willing to surprise your loved one everything goes on to reflect on the kind of equation you share. While roses stand for eternal love, chrysanthemums exemplify fidelity and the sheer joy of being with each other. You might as well want to surprise your loved one anytime of the day, but if you want him/her to wake up to your wishes first then you can Send flowers to India Midnight delivery. What more? You necessarily aren’t required to restrict your choices to flowers and chocolates alone. Unlock the true potential of online anniversary gifting by exploring myriad options like passionate fragrances, personalised quirky coffee mugs, hand crafted chocolates and a lot more. Send romantic gifts to India but not by throwing sagacity to the wind. If you are virtually floored by the collection of a particular gift store then make sure you are investigating credentials and considering pecuniary aspects before moving on! In order to ensure the freshest of flowers (if you are gifting flowers at the first place) opt for same day delivery services. Do check out if they are backed by feasible fiscal propositions like free or reasonable shipping charges or exchange policies or not. Do you want to Deliver Combo Gifts for Anniversary? Make sure you’re comparing prices of combo gifts offered by several gift stores.

The author is a regular contributor to flowersngifts24x7.com which has revolutionized online gifting in India by bringing the choices of gifts for all occasions like birthday, anniversary, Diwali and Valentine’s day among others – to the fore.

Article Source:

eArticlesOnline.com

[youtube]http://www.youtube.com/watch?v=QZUKJJqdozY[/youtube]

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Wikinews interviews Mario J. Lucero and Isabel Ruiz of Heaven Sent Gaming

Author: Admin  |  Category: Uncategorized

Friday, November 7, 2014Albuquerque, New Mexico —Online entertainment is a booming market, and plenty of players are making their play; back in March of this year The Walt Disney Company bought the multi-channel network Maker Studios. What is web entertainment, and the arts therein? And, who are the people venturing into this field? Wikinews interviewed Mario Lucero and Isabel Ruiz, the founders of Heaven Sent Gaming, a small entertainment team. This group has been responsible for several publications, within several different media formats; one successful example was aywv, a gaming news website, which was #1 in Gaming on YouTube in 2009, from September to November; Heaven Sent Gaming was also the subject of a referential book, released in 2014, entitled Internet Legends – Heaven Sent Gaming.

Beagle Training How To Pick A Good Companion Beagle!}

Author:  |  Category: Dog Rescue

Submitted by: Clayton James

Now that you are thinking about getting a Beagle as a companion, you may be tempted to first look at some puppies and pick the one with the demeanor that you want. But here is a better tactic…try looking for a Beagle that enhances your personality. Look for a pet that is the picture of what you planned and that can bond with you. Age is not really a concern most of the time. Beagles may have typical characteristics, but there are exceptions to all the rules. These tips can help you find a good companion Beagle.

Submissive or dominant?

Find a puppy or adult that has a personality that fits your own characteristics and your experience. If you have experience with more independent Beagles, then a more dominant, independent Beagle may work for you. However, if you are not aggressive or are not used to working with Beagles, a more submissive animal may be a better choice for you. When you are looking at puppies or small Beagles, hold one and turn it over on its back. A dominant Beagle will fight you, trying to turn over right away. If it struggles, try to comfort it. If it settles down easily, it is more submissive. If it does not struggle at all, but just relaxes, you have a very submissive Beagle.

A Beagle to fit your personality

A Beagle that is fairly quiet and requires little care is better for you if you are more laid back and more sedative yourself. If you have an active life you may find that a more active, hyper Beagle is more your style. If you are gone much of the time and your Beagle would be kenneled during that time, you want to find one that is a little independent and will not suffer from separation anxiety.

You also want your companion Beagle to be intelligent and eager to please. This will help you teach it what you want it to know and it will want to learn the skills and perform them. If you are taking your Beagle out in public, you don’t want a fear biter or one that is aggressive to strangers. Naturally, this will come with effectively socializing the Beagle regularly, but the sharper Beagle will pick up cues from you when determining who the “bad guy” is and who is a friend.

Develop your own language

Beagles can be excellent companions with the right personality type for your needs. Also, while many folks feel that only puppies can be trained, this is false. Many older Beagles are rescued from dog pounds every day and they are trained quite easily. The key to getting a well behaved companion is bonding with it. When you have bonded with your Beagle, it will cater to your needs. They will want to anticipate what you want and will even try to find new ways to communicate with you. If you are discerning, you and your Beagle can come up with your own language, giving you a great companion.

About the Author: Clayton James is a long time Beagle enthusiast and is well known in the Beagle training community. He is the founder of

FreeBeagleTraining.com

To get his FREE report: “How To Become The Alpha Dog” go to

FreeBeagleTraining.com/alpha-dog-sp

Source:

isnare.com

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Canada’s Don Valley East (Ward 33) city council candidates speak

Author:  |  Category: Uncategorized
This exclusive interview features first-hand journalism by a Wikinews reporter. See the collaboration page for more details.

Saturday, November 4, 2006

On November 13, Torontonians will be heading to the polls to vote for their ward’s councillor and for mayor. Among Toronto’s ridings is Don Valley East (Ward 33). One candidates responded to Wikinews’ requests for an interview. This ward’s candidates include Zane Caplan, Shelley Carroll (incumbent), Jim Conlon, Sarah Tsang-Fahey, and Anderson Tung.

For more information on the election, read Toronto municipal election, 2006.

Airbus parent EADS wins £13 billion UK RAF airtanker contract

Author:  |  Category: Uncategorized

Thursday, March 27, 2008

European Aeronautic Defence & Space NV (EADS), the parent company of European airframer Airbus, has won a £13 billion contract to supply the United Kingdom’s Royal Air Force (RAF) with aerial refueling tankers to replace the nation’s current ageing fleet.

AirTanker Ltd., an EADS-led consortium, have signed a 27-year contract with the Defense Ministry to supply 14 new Airbus A330-200 passenger airliner converted for the task. They will be owned by AirTanker, who retains commercial leasing rights to five which can carry 290 passengers plus cargo, but will fly in RAF livery. They replace existing Lockheed Tristar and Vickers VC-10 aircraft. The first aircraft will be in service by 2011 and all by 2016.

Rolls-Royce, part of the consortium, will supply engines. France’s Thales will supply electronics, Wimborne, UK’s Cobham will manufacture refueling equipment and Southampton, UK’s VT Group will provide service management.

Last month, Northrop Grumman and EADS defeated Boeing to win a massive order for 179 tankers from the United States Air Force. Airbus has also inked recent deals with the Royal Australian Air Force, the Royal Saudi Air Force and the UAE Air Force.

News briefs:June 4, 2010

Author:  |  Category: Uncategorized
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Best Contact Lenses A Review Of The Leading Contact Lenses For This Year

Author:  |  Category: Cosmetic Surgery

By Oliver Turner

Want to buy new contact lenses? Here we provide you with a review so that you can compare the price and quality of top branded contact lenses including disposable, dailywear and colored.

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a. Daily disposable use is amazingly hassle-free.

b. Light and comfortable for eyes.

c. Smooth rounded edge

Bad points of focus dailies:

a. Costs more than fortnightly or monthly lenses.

[youtube]http://www.youtube.com/watch?v=mXJe48y6FHs[/youtube]

b. Feel tight on the eye. after a full days wear.

c. Can be difficult to remove due to this tightness.

d. Can’t sleep in them.

Ciba vision optix: They offer high breathability at lower rates. You can wear them for more than ten hours per day without any irritating.

Good points of Ciba vision optix:

a. Highly breathable.

b. Comfortable and durable.

Negative aspects of Ciba vision optix:

a. They are expensive.

b. Can not sleep wearing them.

Fresh Look Colorblends: They are the cheapest Color Lenses available in the web. Lot of color variation is available to choose from. Crazy Color contact lenses are also available to give Halloween effects.

1DAY ACUVUE: If you are among them who replace their contact lens per day, nothing to disappoint, you too have something new. 1 DAY ACUVUE offer you most convenient and healthiest way to wear contact lenses. No lens case, No solutions and no need of maintenance. Just use and throw. Wear a new contact lens every day and feel your self fresh from dawn to dusk. 100% satisfaction guarantee provided by ACUVUE is signature of their proficiency.

Some unmatchable properties of 1 DAY ACUVUE:

a) Provides freedom for sports or active lifestyles.

b) No lens care, cases or messy solutions required.

c) Protects you from ultra violet radiations.

d) Perfect for allergy sufferers.

e) Great for occasional uses.

With the help of available reviews you can buy the best contact lens suitable for you.

About the Author: Our experts have made a research and found the best places to get contact lenses. Find it only on the

Disocunt Contact Lenses Online Index

. All about contact lens on http://www.contact-lens-discount-stores.com

Source:

isnare.com

Permanent Link:

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ACLU, EFF challenging US ‘secret’ court orders seeking Twitter data

Author:  |  Category: Uncategorized

Thursday, April 7, 2011

Late last month, the American Civil Liberties Union (ACLU) and Electronic Frontier Foundation (EFF) filed objections to the United States Government’s ‘secret’ attempts to obtain Twitter account information relating to WikiLeaks. The ACLU and EFF cite First and Fourth amendment issues as overriding reasons to overturn government attempts to keep their investigation secret; and, that with Birgitta Jonsdottir being an Icelandic Parliamentarian, the issue has serious international implications.

The case, titled “In the Matter of the 2703(d) Order Relating to Twitter Accounts: Wikileaks, Rop_G, IOERROR; and BirgittaJ“, has been in the EFF’s sights since late last year when they became aware of the US government’s attempts to investigate WikiLeaks-related communications using the popular microblogging service.

The key objective of this US government investigation is to obtain data for the prosecution of Bradley Manning, alleged to have supplied classified data to WikiLeaks. In addition to Manning’s Twitter account, and that of WikiLeaks (@wikileaks), the following three accounts are subject to the order: @ioerror, @birgittaj, and @rop_g. These, respectively, belong to Jacob Apelbaum, Birgitta Jonsdottir, and Rop Gonggrijp.

Birgitta is not the only non-US citizen with their Twitter account targeted by the US Government; Gonggrijp, a Dutch ‘ex-hacker’-turned-security-expert, was one of the founders of XS4ALL – the first Internet Service Provider in the Netherlands available to the public. He has worked on a mobile phone that can encrypt conversations, and proven that electronic voting systems can readily be hacked.

In early March, a Virginia magistrate judge ruled that the government could have the sought records, and neither the targeted users, or the public, could see documents submitted to justify data being passed to the government. The data sought is as follows:

  1. Personal contact information, including addresses
  2. Financial data, including credit card or bank account numbers
  3. Twitter account activity information, including the “date, time, length, and method of connections” plus the “source and destination Internet Protocol address(es)”
  4. Direct Message (DM) information, including the email addresses and IP addresses of everyone with whom the Parties have exchanged DMs

The order demands disclosure of absolutely all such data from November 1, 2009 for the targeted accounts.

The ACLU and EFF are not only challenging this, but demanding that all submissions made by the US government to justify the Twitter disclosure are made public, plus details of any other such cases which have been processed in secret.

Bradley Manning, at the time a specialist from Maryland enlisted with the United States Army’s 2nd Brigade, 10th Mountain Division, was arrested in June last year in connection with the leaking of classified combat video to WikiLeaks.

The leaked video footage, taken from a US helicopter gunship, showed the deaths of Reuters staff Saeed Chmagh and Namir Noor-Eldeen during a U.S. assault in Baghdad, Iraq. The wire agency unsuccessfully attempted to get the footage released via a Freedom of Information Act request in 2007.

When WikiLeaks released the video footage it directly contradicted the official line taken by the U.S. Army asserting that the deaths of the two Reuters staff were “collateral damage” in an attack on Iraqi insurgents. The radio chatter associated with the AH-64 Apache video indicated the helicopter crews had mistakenly identified the journalists’ equipment as weaponry.

The US government also claims Manning is linked to CableGate; the passing of around a quarter of a million classified diplomatic cables to WikiLeaks. Manning has been in detention since July last year; in December allegations of torture were made to the United Nations High Commissioner for Human Rights regarding the conditions under which he was and is being detained.

Reports last month that he must now sleep naked and attend role call at the U.S. Marine facility in Quantico in the same state, raised further concern over his detention conditions. Philip J. Crowley, at-the-time a State Department spokesman, remarked on this whilst speaking at Massachusetts Institute of Technology; describing the current treatment of Manning as “ridiculous and counterproductive and stupid”, Crowley was, as a consequence, put in the position of having to tender his resignation to Secretary of State Hillary Clinton.

Despite his native Australia finding, in December last year, that Assange’s WikiLeaks had not committed any criminal offences in their jurisdiction, the U.S. government has continued to make ongoing operations very difficult for the whistleblower website.

The result of the Australian Federal Police investigation left the country’s Prime Minister, Julia Gillard, having to retract a statement that WikiLeaks had acted “illegally”; instead, she characterised the site’s actions as “grossly irresponsible”.

Even with Australia finding no illegal activity on the part of WikiLeaks, and with founder Julian Assange facing extradition to Sweden, U.S. pressure sought to hobble WikiLeaks financially.

Based on a State Department letter, online payments site PayPal suspended WikiLeaks account in December. Their action was swiftly followed by Visa Europe and Mastercard ceasing to handle payments for WikiLeaks.

The online processing company, Datacell, threatened the two credit card giants with legal action over this. However, avenues of funding for the site were further curtailed when both Amazon.com and Swiss bank PostFinance joined the financial boycott of WikiLeaks.

Assange continues, to this day, to argue that his extradition to Sweden for questioning on alleged sexual offences is being orchestrated by the U.S. in an effort to discredit him, and thus WikiLeaks.

Wikinews consulted an IT and cryptography expert from the Belgian university which developed the current Advanced Encryption Standard; explaining modern communications, he stated: “Cryptography has developed to such a level that intercepting communications is no longer cost effective. That is, if any user uses the correct default settings, and makes sure that he/she is really connecting to Twitter it is highly unlikely that even the NSA can break the cryptography for a protocol such as SSL/TLS (used for https).”

Qualifying this, he commented that “the vulnerable parts of the communication are the end points.” To make his point, he cited the following quote from Gene Spafford: “Using encryption on the Internet is the equivalent of arranging an armored car to deliver credit card information from someone living in a cardboard box to someone living on a park bench.

Continuing, the Katholieke Universiteit Leuven (KUL) expert explained:

In the first place, the weak point is Twitter itself; the US government can go and ask for the data; companies such as Twitter and Google will typically store quite some information on their users, including IP addresses (it is known that Google deletes the last byte of the IP address after a few weeks, but it is not too hard for a motivated opponent to find out what this byte was).
In the second place, this is the computer of the user: by exploiting system weaknesses (with viruses, Trojan horses or backdoors in the operating system) a highly motivated opponent can enter your machine and record your keystrokes plus everything that is happening (e.g. the FBI is known to do this with the so-called Magic Lantern software). Such software is also commercially available, e.g. for a company to monitor its employees.
It would also be possible for a higly motivated opponent to play “man-in-the-middle”; that means that instead of having a secure connection to Twitter.com, you have a secure connection to the attacker’s server, who impersonates Twitter’s and then relays your information to Twitter. This requires tricks such as spoofing DNS (this is getting harder with DNSsec), or misleading the user (e.g. the user clicks on a link and connects to tw!tter.com or Twitter.c0m, which look very similar in a URL window as Twitter.com). It is clear that the US government is capable of using these kind of tricks; e.g., a company has been linked to the US government that was recognized as legitimate signer in the major browsers, so it would not be too large for them to sign a legitimate certificate for such a spoofing webserver; this means that the probability that a user would detect a problem would be very low.
As for traffic analysis (finding out who you are talking to rather than finding out what you are telling to whom), NSA and GCHQ are known to have access to lots of traffic (part of this is obtained via the UK-USA agreement). Even if one uses strong encryption, it is feasible for them to log the IP addresses and email addresses of all the parties you are connecting to. If necessary, they can even make routers re-route your traffic to their servers. In addition, the European Data Retention directive forces all operators to store such traffic data.
Whether other companies would have complied with such requests: this is very hard to tell. I believe however that it is very plausible that companies such as Google, Skype or Facebook would comply with such requests if they came from a government.
In summary: unless you go through great lengths to log through to several computers in multiple countries, you work in a clean virtual machine, you use private browser settings (don’t accept cookies, no plugins for Firefox, etc.) and use tools such as Tor, it is rather easy for any service provider to identify you.
Finally: I prefer not to be quoted on any sentences in which I make statements on the capabilities or actions of any particular government.

Wikinews also consulted French IT security researcher Stevens Le Blond on the issues surrounding the case, and the state-of-the-art in monitoring, and analysing, communications online. Le Blond, currently presenting a research paper on attacks on Tor to USENIX audiences in North America, responded via email:

Were the US Government to obtain the sought data, it would seem reasonable the NSA would handle further investigation. How would you expect them to exploit the data and expand on what they receive from Twitter?

  • Le Blond: My understanding is that the DOJ is requesting the following information: 1) Connection records and session times 2) IP addresses 3) e-mail addresses 4) banking info
By requesting 1) and 2) for Birgitta and other people involved with WikiLeaks (WL) since 2009, one could derive 2 main [pieces of] information.
First, he could tell the mobility of these people. Recent research in networking shows that you can map an IP address into a geographic location with a median error of 600 meters. So by looking at changes of IP addresses in time for a Twitter user, one could tell (or at least speculate about) where that person has been.
Second, by correlating locations of different people involved with WL in time, one could possibly derive their interactions and maybe even their level of involvement with WL. Whether it is possible to derive this information from 1) and 2) depends on how this people use Twitter. For example, do they log on Twitter often enough, long enough, and from enough places?
My research indicates that this is the case for other Internet services but I cannot tell whether it is the case for Twitter.
Note that even though IP logging, as done by Twitter, is similar to the logging done by GSM [mobile phone] operators, the major difference seems to be that Twitter is subject to US regulation, no matter the citizenship of its users. I find this rather disturbing.
Using 3), one could search for Birgitta on other Internet services, such as social networks, to find more information on her (e.g., hidden accounts). Recent research on privacy shows that people tend to use the same e-mail address to register an account on different social networks (even when they don’t want these accounts to be linked together). Obviously, one could then issue subpoenas for these accounts as well.
I do not have the expertise to comment on what could be done with 4).
((WN)) As I believe Jonsdottir to be involved in the Icelandic Modern Media Initiative (IMMI), what are the wider implications beyond the “WikiLeaks witchhunt”?
  • Le Blond: Personal data can be used to discredit, especially if the data is not public.

Having been alerted to the ongoing case through a joint press release by the ACLU and EFF, Wikinews sought clarification on the primary issues which the two non-profits saw as particularly important in challenging the U.S. Government over the ‘secret’ court orders. Rebecca Jeschke, Media Relations Director for the EFF, explained in more detail the points crucial to them, responding to a few questions from Wikinews on the case:

((WN)) As a worse-case, what precedents would be considered if this went to the Supreme Court?
  • Rebecca Jeschke: It’s extremely hard to know at this stage if this would go to the Supreme Court, and if it did, what would be at issue. However, some of the interesting questions about this case center on the rights of people around the world when they use US Internet services. This case questions the limits of US law enforcement, which may turn out to be very different from the limits in other countries.
((WN)) Since this is clearly a politicised attack on free speech with most chilling potential repercussions for the press, whistleblowers, and by-and-large anyone the relevant U.S. Government departments objects to the actions of, what action do you believe should be taken to protect free speech rights?
  • Jeschke: We believe that, except in very rare circumstances, the government should not be permitted to obtain information about individuals’ private Internet communications in secret. We also believe that Internet companies should, whenever possible, take steps to ensure their customers are notified about requests for information and have the opportunity to respond.
((WN)) Twitter via the web, in my experience, tends to use https:// connections. Are you aware of any possibility of the government cracking such connections? (I’m not up to date on the crypto arms race).
  • Jeschke: You don’t need to crack https, per se, to compromise its security. See this piece about fraudulent https certificates:
Iranian hackers obtain fraudulent httpsEFF website.
((WN)) And, do you believe that far, far more websites should – by default – employ https:// connections to protect people’s privacy?
  • Jeschke: We absolutely think that more websites should employ https! Here is a guide for site operators: (See external links, Ed.)

Finally, Wikinews approached the Icelandic politician, and WikiLeaks supporter, who has made this specific case a landmark in how the U.S. Government handles dealings with – supposedly – friendly governments and their elected representatives. A number of questions were posed, seeking the Icelandic Parliamentarian’s views:

((WN)) How did you feel when you were notified the US Government wanted your Twitter account, and message, details? Were you shocked?
  • Birgitta Jonsdottir: I felt angry but not shocked. I was expecting something like this to happen because of my involvement with WikiLeaks. My first reaction was to tweet about it.
((WN)) What do you believe is their reasoning in selecting you as a ‘target’?
  • Jonsdottir: It is quite clear to me that USA authorities are after Julian Assange and will use any means possible to get even with him. I think I am simply a pawn in a much larger context. I did of course both act as a spokesperson for WikiLeaks in relation to the Apache video and briefly for WikiLeaks, and I put my name to the video as a co-producer. I have not participated in any illegal activity and thus being a target doesn’t make me lose any sleep.
((WN)) Are you concerned that, as a Member of Parliament involved in the Icelandic Modern Media Initiative (IMMI), the US attempt to obtain your Twitter data is interfering with planned Icelandic government policy?
  • Jonsdottir: No
((WN)) In an earlier New York Times (NYT) article, you’re indicating there is nothing they can obtain about you that bothers you; but, how do you react to them wanting to know everyone you talk to?
  • Jonsdottir: It bothers me and according to top computer scientists the government should be required to obtain a search warrant to get our IP addresses from Twitter. I am, though, happy I am among the people DOJ is casting their nets around because of my parliamentary immunity; I have a greater protection then many other users and can use that immunity to raise the issue of lack of rights for those that use social media.
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((WN)) The same NYT article describes you as a WikiLeaks supporter; is this still the case? What attracts you to their ‘radical transparency’?
  • Jonsdottir: I support the concept of WikiLeaks. While we don’t have a culture of protection for sources and whistleblowers we need sites like WikiLeaks. Plus, I think it is important to give WikiLeaks credit for raising awareness about in how bad shape freedom of information and expression is in our world and it is eroding at an alarming rate because of the fact that legal firms for corporations and corrupt politicians have understood the borderless nature of the legalities of the information flow online – we who feel it is important that people have access to information that should remain in the public domain need to step up our fight for those rights. WikiLeaks has played an important role in that context.I don’t support radical transparency – I understand that some things need to remain secret. It is the process of making things secret that needs to be both more transparent and in better consensus with nations.
((WN)) How do you think the Icelandic government would have reacted if it were tens of thousands of their diplomatic communications being leaked?
  • Jonsdottir: I am not sure – A lot of our dirty laundry has been aired via the USA cables – our diplomatic communications with USA were leaked in those cables, so far they have not stirred much debate nor shock. It is unlikely for tens of thousands of cables to leak from Iceland since we dont have the same influence or size as the USA, nor do we have a military.
((WN)) Your ambassador in the US has spoken to the Obama administration. Can you discuss any feedback from that? Do you have your party’s, and government’s, backing in challenging the ordered Twitter data release?
  • Jonsdottir: I have not had any feedback from that meeting, I did however receive a message from the DOJ via the USA ambassador in Iceland. The message stated three things: 1. I am free to travel to the USA. 2. If I would do so, I would not be a subject of involuntary interrogation. 3. I am not under criminal investigation. If this is indeed the reality I wonder why they are insisting on getting my personal details from Twitter. I want to stress that I understand the reasoning of trying to get to Assange through me, but I find it unacceptable since there is no foundation for criminal investigation against him. If WikiLeaks goes down, all the other media partners should go down at the same time. They all served similar roles. The way I see it is that WikiLeaks acted as the senior editor of material leaked to them. They could not by any means be considered a source. The source is the person that leaks the material to WikiLeaks. I am not sure if the media in our world understands how much is at stake for already shaky industry if WikiLeaks will carry on carrying the brunt of the attacks. I think it would be powerful if all the medias that have had access to WikiLeaks material would band together for their defence.
((WN)) Wikinews consulted a Belgian IT security expert who said it was most likely companies such as Facebook, Microsoft, and Google, would have complied with similar court orders *without advising the ‘targets*’. Does that disturb you?
  • Jonsdottir: This does disturb me for various reasons. The most obvious is that my emails are hosted at google/gmail and my search profile. I dont have anything to hide but it is important to note that many of the people that interact with me as a MP via both facebook and my various email accounts don’t always realize that there is no protection for them if they do so via those channels. I often get sensitive personal letters sent to me at facebook and gmail. In general most people are not aware of how little rights they have as users of social media. It is those of uttermost importance that those sites will create the legal disclaimers and agreements that state the most obvious rights we lose when we sign up to their services.
This exclusive interview features first-hand journalism by a Wikinews reporter. See the collaboration page for more details.
((WN)) Has there been any backlash within Iceland against US-based internet services in light of this? Do you expect such, or any increase in anti-American sentiments?
  • Jonsdottir: No, none what so ever. I dont think there is much anti-American sentiments in Iceland and I dont think this case will increase it. However I think it is important for everyone who does not live in the USA and uses social services to note that according to the ruling in my case, they dont have any protection of the 1st and 4th amendment, that only apply to USA citizens. Perhaps the legalities in relation to the borderless reality we live in online need to be upgraded in order for people to feel safe with using social media if it is hosted in the USA. Market tends to bend to simple rules.
((WN)) Does this make you more, or less, determined to see the IMMI succeed?
  • Jonsdottir: More. People have to realize that if we dont have freedom of information online we won’t have it offline. We have to wake up to the fact that our rights to access information that should be in the public domain is eroding while at the same time our rights as citizens online have now been undermined and we are only seen as consumers with consumers rights and in some cases our rights are less than of a product. This development needs to change and change fast before it is too late.

The U.S. Government continues to have issues internationally as a result of material passed to WikiLeaks, and subsequently published.

Within the past week, Ecuador has effectively declared the U.S. ambassador Heather Hodges persona-non-grata over corruption allegations brought to light in leaked cables. Asking the veteran diplomat to leave “as soon as possible”, the country may become the third in South America with no ambassadorial presence. Both Venezuela and Bolivia have no resident U.S. ambassador due to the two left-wing administrations believing the ejected diplomats were working with the opposition.

The U.S. State Department has cautioned Ecuador that a failure to speedily normalise diplomatic relations may jeapordise ongoing trade talks.

The United Kingdom is expected to press the Obama administration over the continuing detention of 23-year-old Manning, who also holds UK citizenship. British lawmakers are to discuss his ongoing detention conditions before again approaching the U.S. with their concerns that his solitary confinement, and treatment therein, is not acceptable.

The 22 charges brought against Manning are currently on hold whilst his fitness to stand trial is assessed.

University of Calgary scientist Keith cracks carbon capture conundrum

Author:  |  Category: Uncategorized

Thursday, October 2, 2008

A University of Calgary research team developed a new method for extracting carbon dioxide (CO2) directly from the air — a fundamental shift in carbon capture technology enabling capture of the most common greenhouse gas from so-called diffuse sources like aircraft, trucks and automobiles that represent half of the greenhouse gases emitted globally.

Professor David Keith, Director of University of Calgary’s (UofC) Institute for Sustainable Energy, Environment and Economy (ISEEE) and a team of researchers from UofC’s Energy and Environmental Systems Group built and operated a prototype system this summer producing results that compared favourably with commercial carbon capture systems. Two ‘provisional’ patents have been filed on the technology but Keith warns there are still “many pitfalls along the path to commercialization.”

Using a process adapted from the pulp-and-paper industry that halves the cost of CO2 air capture in their custom-built tower, Professor Keith and his team captured the equivalent of about 20 tonnes per year of CO2 (approximately equal to the yearly output of one person in North America) directly from the air with less than 100 kilowatt-hours of electricity per tonne of carbon dioxide on a single square metre of scrubbing material.

“This means that if you used electricity from a coal-fired power plant, for every unit of electricity you used to operate the capture machine, you’d be capturing 10 times as much CO2 as the power plant emitted making that much electricity,” explains Professor Keith.

A report co-authored by Keith in the American Chemical Society’s journal Environmental Science & Technology explains “nearly all current research on carbon capture and storage (CCS) focuses on capturing CO2 from large, stationary sources such as power plants. Such plans usually entail separating CO2 from flue gas, compressing it, and transporting it via pipeline to be [stored] underground.”

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Using CO2 air capture technology, “a company could, in principle, contract with an oil sands plant near Fort McMurray to remove CO2 from the air and could build its air capture plant wherever it’s cheapest — China, for example — and the same amount of CO2 would be removed,” says Professor Keith in a UofC press release.

“While it’s important to get started doing things we know how to do, like wind power, nuclear power, and ‘regular’ carbon capture and storage,” Professor Keith continues, “it’s also vital to start thinking about radical new ideas and approaches to solving this problem.”

ISEEE’s Executive Director David Layzell points out that “energy-efficient and cost-effective air capture could play a valuable role in complementing other approaches for reducing emissions from the transportation sector, such as biofuels or electric vehicles.”