Navigation Links
Physicists at CCNY determine density limit for randomly packed spherical materials
Date:6/2/2008

NEW YORK, June 2, 2008 The problem of how many identical-sized spheres can be randomly packed into a container has challenged mathematicians for centuries. A team of physicists at The City College of New York (CCNY) has come up with a solution that could have implications for everything from processing granular materials to shipping fruit.

Writing in the May 29 edition of "Nature," they demonstrate that random packing of hard, i.e. non-crushable, spheres in three dimensions cannot exceed a density limit of 63.4 percent of the volume. This upper limit is a consequence of a completely "jammed" state that occurs when the materials are at their lowest energy levels, i.e. as close to inert as possible.

"Theoretically, the jammed state would be achieved by lowering the temperature of the spheres to approach absolute zero, since this would cause them to contract," explained Dr. Hernn Makse, CCNY Associate Professor of Physics and principal investigator. "In real life, however, it is attained by shaking the materials."

The findings have potential applications for the manufacture of pharmaceuticals and cosmetics, where powders have to be mixed to a homogenous consistency, he said. Currently, manufacturers must rely on empirical data, i.e. trial and error, to establish their formulas. Professor Makse said his goal is to develop a theory of powders that could enable manufacturers to more efficiently develop new products.


'/>"/>

Contact: Ellis Simon
esimon@ccny.cuny.edu
212-650-6460
City College of New York
Source:Eurekalert

Page: 1

Related medicine news :

1. CT radiation dose report released by American Association of Physicists in Medicine
2. Type of Tomato Product Determines Power Against Prostate Cancer
3. MR imaging accurately determines prostate cancer treatment failure
4. Determined a new method to establish the antioxidant capacity of extra virgin olive oil
5. Quality Care, Not Number of Procedures, Determines Bypass Results
6. HRT Dosing May Determine Risks, Benefits
7. Breech Birth May Be Determined by Genes
8. Kidney cancer surgery often determined by surgeons practice style, not medical factors
9. Scientists determine structure of brain receptor implicated in epilepsy and PMT
10. NIH awards OHSU researcher $1.2 million to determine causes of, risk factors for pelvic floor injury
11. U of M researchers determine structure of protein that mutates DNA of the AIDS virus HIV-1
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/7/2016)... ... December 07, 2016 , ... Augustine ... services to families and business owners in the greater Dallas metropolitan area, is ... Dallas Fallen Officer Foundation. , Established in 2009 by active police professionals in ...
(Date:12/7/2016)... Peoria, IL (PRWEB) , ... December 07, 2016 , ... ... holiday season. Many children are not fortunate enough to receive bountiful gifts wrapped ... that unwrapping presents can bring to the children of the world. , In exchange ...
(Date:12/7/2016)... ... OCTOBER XX, 2016 (PRWEB) (PRWEB) December 07, 2016 , ... ... new study entitled “Canine Filamentous Dermatitis Associated with Borrelia Infection” ... The study was published in the prestigious Journal of Veterinary Science & Medical ...
(Date:12/7/2016)... ... December 07, 2016 , ... ... announce that its fully redesigned website, which launched October 17, 2016, features comprehensive ... responsive design and easy-to-navigate layout. Visitors and patients can discover the latest clinical ...
(Date:12/7/2016)... , ... December 07, 2016 , ... Delete® - Tattoo ... Time For The Holiday Party Season. Save Up To 33% Off Botox® and Juvederm® ... is providing the Phoenix Valley with Delightful Deals on Botox® and Juvederm® ...
Breaking Medicine News(10 mins):
(Date:12/7/2016)... 7, 2016  Organovo Holdings, Inc. (NASDAQ: ... focused on delivering scientific and medical breakthroughs using ... and Chief Executive Officer Keith Murphy ... December 14, 2016 at 1:00 p.m. Eastern Time ... yet familiar with the Company, an informational video ...
(Date:12/7/2016)... NEW YORK , December 7, 2016 ... by Persistence Market Research titled , Global Market Study on ... Market Through 2024 , the global multiplex detection immunoassay ... the forecast period 2016-2024. ... , , ...
(Date:12/6/2016)... 6, 2016  Licenders is bringing their 100% all-natural lice removal ... Park Slope at 203 13 th Street was specifically chosen ... clientele. "Our goal is to ease parents, stress and ... to get children right back to class without skipping a beat. ... and safe for the whole family," Licenders President Adie Horowitz ...
Breaking Medicine Technology: