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:6/20/2017)... ... June 20, 2017 , ... In his newly appointed role ... May, Ph.D., recently accepted the distinguished Sun Corridor Export Award for his company’s ... (WNB), and 16 other businesses from Pima, Pinal, and Maricopa counties in Arizona, ...
(Date:6/20/2017)... West Hempstead, NY (PRWEB) , ... June 20, ... ... most experienced in the security systems industry has been selected as the partner ... , Amtrak is a passenger railroad service that provides medium- and long-distance intercity ...
(Date:6/20/2017)... ... 2017 , ... John D'Eri, CEO of Rising Tide Car Wash , ... during the Autism Society of America 's 49th annual conference to be ... Foundation (DJFF) was founded in 2002 as the nation's first autism organization focused ...
(Date:6/20/2017)... ... June 20, 2017 , ... MEDI+SIGN, ... like to officially welcome Anthony Stanowski, DHA, FACHE to the MEDI+SIGN Advisory Board. ... and expertise in healthcare will provide invaluable direction for the company,” says Andrew ...
(Date:6/20/2017)... ... , ... The law firm of Momkus McCluskey Roberts LLC congratulates ... DuPage County Bar Association’s Board of Directors. Cassioppi officially took on the leadership role ... Oak Brook. Momkus McCluskey Roberts LLC attorney Stacey A. McCullough was also installed as ...
Breaking Medicine News(10 mins):
(Date:6/1/2017)... , June 1, 2017 Nutriceutical Holdings (NH), ... Recommended Solutions (VRS), and KD Pharma Group have decided ... Holdings by KD Pharma Group. KD Pharma Group will ... option to acquire the entire company. "We ... They are committed to growing the NH companies by ...
(Date:5/26/2017)... -- Endo International plc (NASDAQ: ENDP ) announced today ... the Company in a fireside chat at Goldman Sachs, 38 ... 2017 at 10:40 a.m. PT / 1:40 p.m. ET. The ... Rancho Palos Verdes, CA. A live ... on the Company,s website at http://www.endo.com/investors/overview . Participants should ...
(Date:5/22/2017)... 22, 2017  As the specialty pharmacy industry ... to make the revolutionary shift from volume-based to ... ensuring positive patient outcomes and shaping the future ... focus away from clinical trials and toward data ... specialty drug therapy utilization in precise patient populations. ...
Breaking Medicine Technology: