�For more than 15 years, atomic number 6 nanotubes (CNTs) have been the flagship material of nanotechnology. Researchers have conceived applications for nanotubes ranging from microelectronic devices to cancer therapy. Their nuclear structure should, in theory, give them mechanical and electrical properties far superior to most common materials.
Unfortunately, theory and experiments take failed to converge on the true mechanical properties of CNTs. Researchers at Northwestern University recently made the first experimental measurements of the mechanical properties of atomic number 6 nanotubes that directly jibe to the theoretical predictions.
Carbon nanotubes ar cylindrical structures usually less than 30 nanometers in diameter and several microns long. Their small size makes them very strong but at the same time quite a difficult to test individually; as a result, experiments typically vary widely from predictions based on quantum mechanics.
"Imaging and measurement resolutions as well as atomic structural ambiguities (defects) obscured the results of to the highest degree experiments and provided undependable mechanical predictions," said Horacio Espinosa, a professor of mechanical applied science at Northwestern's McCormick School of Engineering and Applied Science.
Espinosa and his group at Northwestern have resolved these issues using a nanoscale material testing system based on microelectromechanical arrangement (MEMS) technology. This system allows electronic measurements of load and displacement during a test, which is performed inside a contagion electron microscope to provide real-time atomic imaging.
"This method removes all ambiguity from testing results," Espinosa aforementioned. "We tin be certain of all the quantities we deliver measured, and the results match quantum mechanics predictions very well."
Espinosa collaborated with George Schatz, Morrison Professor of Chemistry in Northwestern's Weinberg College of Arts and Sciences, as well as with Peter Zapol, a physicist at Argonne National Laboratory. This work is published online in Nature Nanotechnology and will appear in print in the journal's October issue.
Further research also was reported in the same article regarding the effect of electron irradiation on these materials. One would think that radiation would disgrace the atomic structure of the corporeal, but the researchers launch the opposite.
"Irradiating a multiwalled carbon carbon nanotube with an intense electron beam actually forms bonds among the shells of the tube. This is like combination multiple nanotubes into one to form a stronger structure," aforementioned lead writer Bei Peng, who late received his doctoral academic degree from Northwestern under Espinosa's supervision.
This phenomenon also has been theorized in the past, and the research confirms that the properties of multiwalled nanotubes can easily and controllably be altered by electron irradiation.
The irradiation exploit was supplemented by elaborate atomistic moulding. Using computer simulations of the nuclear structure of the nanotubes, the team of researchers was able to isolate the mechanism of strengthening due to irradiation.
"The same procedure secondhand to fortify individual multiwalled nanotubes by irradiation may also be used to link together individual nanotubes into a bundle," said Mark Locascio, a doctorial student joint author of the paper.
This chemical mechanism of crosslinking is a promising method for creating much bigger nanotube-based structures. When nanotubes are packed together, they typically have very weak interactions along their surfaces; a spun nanotube rope would not be closely as potent as its nanoscale constituents. However, beam may be the key to improving these interactions by inducing covalent bonds between tubes. If the properties of nanotubes can be scaly up to macroscale ropes and fibers, they crataegus laevigata become a viable option for whatsoever high-strength application. This could include large cables for applications in industry or infrastructure, as well as smaller togs for whippersnapper woven fabrics, ballistic armors or composite reinforcement.
The Nature Nanotechnology paper was authored by Espinosa, Peng, Locascio, Zapol and Schatz as well as Steven Mielke, a postdoctoral researcher, and Shuyou Li, an negatron microscopist, both at Northwestern.
Source: Megan Fellman
Northwestern University
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Wednesday 3 September 2008
Sunday 24 August 2008
Mp3 music: Arash
 Artist: Arash: mp3 download Genre(s): Dance Trance Arash's discography:  Tike Tike Kardi - Mixes Year: 2005 Tracks: 6  Arash Year: 2005 Tracks: 14  Boro Boro Year: 2004 Tracks: 2 Arash is a popular vocaliser, social dancer, and producer based in Sweden. Born Arash Labash in Iran, the vocaliser touched with his family to Sweden around age x. After graduating from college in 2005, Arash released his self-titled debut record book album, which garnered him several hits throughout Europe. A yr later, he released his soph tap, Crossfade. |
Thursday 14 August 2008
Metallica Look Back At ... And Justice For All; Plus Hatebreed, At All Cost & More News That Rules, In Metal File
Next month marks the 20th anniversary of Metallica's ... And Justice for All, which is maybe one of the most important studio offerings of the band's illustrious calling. Not only when was it Metallica's first base LP following the untimely passing of bassist Cliff Burton, it shot straight to #6 on the Billboard 200 and was certified platinum just iX weeks later it first hit stores.
The now-classic record album signaled many other firsts for Metallica: It was the kickoff record to feature newfangled bassist Jason Newsted, it netted them their first-class honours degree Grammy nominating speech, and it featured the single "One," for which they shot their first-ever music video. Since its release, Justice has scanned more than 8 billion copies in the U.S. alone, and it helped cement their status as a john Rock and wheel force to be reckoned with.
In summation, it was a momentous release for Metallica, one that changed the entire trajectory of the band's career. Now, 20 eld later, we've spoken to the group's members, request them to think back to that time and reflect on the grandness of what may be one of their most beloved efforts.
"Justice obviously was a vast record for us. ... We took the Ride the Lightning and Master of Puppets construct as far as we could take it," drummer Lars Ulrich reflected. "There was no place else to go with the progressive, barmy, sideways side of Metallica, and I'm so majestic of the fact that, in some way, that album is kind of the epitome of that progressive side of us up through the '80s."
Ulrich said that when he listens to the album now, he thinks it still holds up. He feels Justice was an album Metallica � world Health Organization, starting October 20, will headline their first U.S. arena turn since 2004 � had to make, in order to progress as a band and mature.
"It's aged quite comfortably," he aforementioned. "There's a certain kind of specific sound to that record, peculiar sound � whichever adverb you want to choose � that's tending it a kind of life of its own and a little minute of a vibe all its have. There have got been a lot of great musicians we admire who've arrive up and talked roughly what a great inspiration that album has been to them and to their effectual. It's patently awesome to be part of that. That album also sent us on this whole other festive way, because when we came back from touring on that record in 1989, we were like, 'We receive nothing more to offer on this side of Metallica,' and that put us cancelled on some other adventures. When I think of the nine records we've put out, it's impossible for me to think of the music without thinking of the live. And when I think of the experience, I have warm and fuzzy feelings, but I also have questions. Obviously, Justice is well-revered, especially among a destiny of our peers."
According to frontman James Hetfield, Justice provided a showcase for what Metallica were capable of � both as a dance band and as individual players.
testament be touring next month with Avenged Sevenfold. So far, just five North American dates have been set � three of them in Canada. But they will be playing Huntington, West Virginia, on September 6 and Baltimore on September 7. ... Killswitch Engage frontman Howard Jones, Soulfly's Max Cavalera and Bad Brains members H.R. and Darryl Jenifer all make guest appearances on Brooklyn doorknocker Ill Bill's The Hour of Reprisal, which hits stores September 16. ...
Tool's enigmatic Maynard James Keenan has recorded vocals for a strain called "I Don't Have an Excuse, I Just Need a Little Help," for Jubilee's debut offering. The new band features Nine Inch Nails' Aaron North and Queens of the Stone Age's Michael Shuman. But Maynard isn't the just guest the newcomers managed to arrest for their inaugural LP; the disc will as well boast contributions from Dave Grohl and Taylor Hawkins of Foo Fighters and QOTSA frontman Josh Homme. ...
Hatebreed will issue an album's worth of covers called For the Lions on October 28. According to the band's label, the drive will feature Hatebreed's take on classical tracks by the likes of Judge, Metallica, Negative Approach, Agnostic Front, Sheer Terror, the Misfits and Obituary, among others. ... Animosity will collide with the road with Decrepit Birth and Antagonist succeeding month for a handful of West Coast gigs. The number one is arrange for September 9 in Anaheim, California, and the last has been engaged for September 13 in San Francisco. ...
Horse the Band and Heavy Heavy Low Low will squad up succeeding month for a brief run across the U.S. The tour gets under way September 3 in San Antonio and runs through September 25 in Warren, Michigan. ... Annotations of an Autopsy have parted ways with drummer Dan Smith, replacement him with Lyn Jeffs. "Due to various reasons, it wasn't working out with us and him," read a statement from the band. "We felt his heart was no longer in it after expressing his want to leave on numerous occasions this year, which showed when he played live." ...
At All Cost bear been dropped by Century Media Records, and in the wake of that development, seem to give birth gone on an unspecified hiatus. "Things have officially bottomed out," the isthmus wrote in a affirmation. "The machine, which was so finely tuned, has frozen from the cogs and grease balls caught along the way. No label, no press, no money, no tours, no fans � not much hope. But there is and will always be music, and that's something no one could take from At All Cost. We haven't played or practiced since June, merely have written songs that take the band to another sound, another place. We try our individual futures for now � some on the job at school, some just working. Waiting. Waiting for the sun to rise again."
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Wednesday 6 August 2008
Friday 27 June 2008
Juliana Hatfield
Artist: Juliana Hatfield
Genre(s):
Rock
Other
Discography:
Made in China
Year: 2005
Tracks: 12
In Exile Deo
Year: 2004
Tracks: 13
Juliana's Pony: Total System Failure
Year: 2000
Tracks: 13
God's Foot
Year: 2000
Tracks: 16
Beautiful Creature
Year: 2000
Tracks: 13
Bed
Year: 1998
Tracks: 10
Please Do Not Disturb
Year: 1997
Tracks: 6
Only Everything
Year: 1995
Tracks: 17
I See You
Year: 1992
Tracks: 5
Hey Babe
Year: 1992
Tracks: 11
Bowery Ballroom
Year:
Tracks: 10
After Juliana Hatfield disbanded the jangle pop trinity the Blake Babies in 1990, she launched a solo life history, performing similarly melodic indie guitar pop. Singing in an endearingly tenuous voice, Hatfield married her ring hooks to gratifying, bereft pop and startlingly good confessional songs. Her 1992 solo debut, Hey Babe, became a college radio hit, and its follow-up, 1994's Become What You Are, was primed to suit a crossover success in the wake of the commercialization of alternate rock-and-roll. Although Hatfield had a smattering of modern tilt hits, including "Spin the Bottle," she ne'er managed to hit the mainstream audience of peers wish the Lemonheads did, and by the late '90s, she had settled into a cult following.
Hatfield was brocaded in an upper-middle-class home in Massachusetts; her father was a dr. and her mother was a manner editor program for The Boston Globe. As a baby, she learned how to play piano, and during high school day, she played guitar in a covers grouping called the Squids before discovering alternate tilt through the Velvet Underground. Following high schoolhouse, she tended to the Berklee College of Music in Boston, where she studied voice. While at Berklee, she met guitar player John Strohm and drummer Freda Boner, with whom she formed the Blake Babies in 1986. Over the next six years, the Blake Babies and their charming jangle pop became college radio receiver favorites. Hatfield leftfield the band in 1990, and Strohm and Boner formed Antenna.
Immediately following her leaving from the Blake Babies, Hatfield contributed several lyrics to Susanna Hoffs' debut album. The following year, she played bass on the Lemonheads' It's a Shame About Ray, which turned out to be the band's commercial breakthrough. The success of It's a Shame About Ray in 1992 stirred interest in Hatfield's solo debut, Hey Babe. Released on Mammoth Records, the record album was identical interchangeable to the Blake Babies, yet the songs were more personal and confessional. Hey Babe was critically praised and became a college radio and MTV hit, ahead to a major-label contract for Hatfield with Atlantic.
In 1992, Hatfield formed the Juliana Hatfield Three with bassist Dean Fisher and drummer Todd Phillips, and the mathematical group recorded its debut for Atlantic with R.E.M.'s producer, Scott Litt. As she worked on the record, Hatfield became a venial media sense experience; her songs were accepted as friendly, more accessible distillations of the women's liberationist alternative rock movement known as riot grrrl. Hatfield appeared in fashion layouts in Vogue and Sassy, and she became the subject of chatty tidbits well-nigh her speculated romance with Lemonhead Evan Dando and her averment that she was still a virgin at the old age of 25. In light of such exposure, many observers expected her 1993 album Become What You Are to be her mainstream discovery. A heavier record than its herald, Turn What You Are was a curb hit, as "My Sister" and "Spin the Bottle" earned heavy airplay on MTV and modern rock wireless. Nevertheless, the album failed to make her a star.
Only Everything followed in the spring of 1995 as alternative rock was origin to decline in popularity. The album was received with motley reviews, and only "Universal joint Heartbeat" managed to make much clearance on receiving set or MTV, causing the album to sideslip down pat the charts cursorily. Hatfield returned in 1997 with the EP Please Do Not Disturb, followed a year by and by by the full-length Bed. Spring 2000 was a busy time for Hatfield; she released the hushed, reflective solo record album Beautiful Creature and Total System Failure, a collection of louder, poppier material, on the same day. Total System Failure featured Hatfield, quondam Weezer bassist Mike Welsh, and drummer Zephan Courtney as a new banding, Juliana's Pony, which was a iII along the lines of the Juliana Hatfield Three.
Hatfield's following project was a devolve to one of her first gear: in 2000 she reunited with Freda Love and John Strohm, launching a Blake Babies tour and recording an record album, Supreme Being Bless the Blake Babies. The reunion was transitory, only Hatfield and Love continued to work together in a radical called Some Girls, which besides featured Heidi Gluck (the Pieces). Some Girls place extinct the Feel It LP in 2002 and besides did some touring. After that it was back to the solo game for Hatfield. But 2004's In Exile Deo was a bit of a surprise, since later on all her restlessness it was easily one of her strongest, most grow albums. That ripen streak continued with 2005's Made in China, a rude and direct endeavour that she produced herself and put extinct through her possess Ye Olde imprint, and deuce eld later the EP Sittin' in a Tree... with mate Bostonians Frank Smith, an alt-country set, was released, as well as a assemblage of live recordings called The White Broken Line: Live Recordings.
Thursday 19 June 2008
Snoop Dogg's Wife In Drink Driving Arrest
SNOOP DOGG's wife has been arrested on suspicion of drink driving.
Shante Broadus was pulled over in the early hours of Saturday (14Jun08) morning while driving in Fullerton, California.
Broadus - who was alone in the car - was detained and booked on charges of driving under the influence. She was released later that day (14Jun08), pending a court appearance, according to TMZ.com.
Broadus married in the rapper - real name Calvin Broadus - in 1997 and they have three children together. (
Shante Broadus was pulled over in the early hours of Saturday (14Jun08) morning while driving in Fullerton, California.
Broadus - who was alone in the car - was detained and booked on charges of driving under the influence. She was released later that day (14Jun08), pending a court appearance, according to TMZ.com.
Broadus married in the rapper - real name Calvin Broadus - in 1997 and they have three children together. (
Friday 13 June 2008
Al Reynolds Speak About Split From Star
Star Jones' soon-to-be ex-husband Al Reynolds is opening up about their split, posting a message via his MySpace page saying that he entered the marriage with "love and the best of intentions", and that he feels "great sadness that it didn't work."TV personality Jones, 46, filed for divorce from Reynolds, 37, in April, citing no reason for the split. She did admit that she made an "error in judgment" by inviting the media into their lavish 2004 wedding, however. Reynolds posted a lengthy message on his MySpace page on Tuesday (May 13) - read Reynolds' full message here - in which he described the stress he has been under since the media got wind of his split:Dear Friends: If you think you are having a tough day, may I propose you walk in my shoes for a few hours. In my mind, it feels like “Dump on Al Month.” And I’m not having fun yet. I have been called a gigolo, a freeloader, unemployed, a sham and many other things that don’t bear repeating.People on television, radio and the internet have spoken disparagingly of my life, my sexuality, my career and my integrity. The media has barraged me (at my home), my friends, my family(including my 79 year old mother), my college classmates, my students and my professional colleagues... I take great comfort in the fact that my loved ones and those people who really know me continue to love and respect me. Thank you “all” for the endless emails, phone calls and words of encouragement. I know in my heart that I entered my marriage with love and the best of intentions and leave it with great sadness that it didn’t work. What the world doesn’t know about me would fill a book, but I know who I am and what I have achieved in my life... What I want people to know is that I am not the caricature portrayed by the media. I am complex, contradictory and capable of great intelligence but also remarkable stupidity. In other words, I am a human being. To me, labels are for clothes, not people. So…..Please don’t try to define me; don’t try to categorize me; and most of all, don’t label me. Instead, JUST GET TO KNOW ME. And if you see me, just call me Al."Photo courtesy of Associated Press. Taken by Matthew Jordan Smith.
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