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Recent News and Articles on the Keywords: 330 + web + 0.25  Related to the article below (Last Update: 8/5/2008)

Home Base Calendar, July 30
Norwich Bulletin, CT - Jul 29, 2008
Children?s races of 0.25 and 0.3 miles, along with scenic runs of 1, 2 and 3 miles for adults will take place. For information, call Tom McCoy at 599-1219 ...
First Defiance Announces 2008 Second Quarter Earnings
PR Newswire (press release), NY - Jul 21, 2008
For more information, visit the company's Web site at http://www.fdef.com. Financial Statements and Highlights Follow- Safe Harbor Statement This news ...FDEF - OTC:PVLN
Build-A-Bear Workshop, Inc. Reports Fiscal 2008 Second Quarter Results
Trading Markets (press release), CA - Jul 24, 2008
Build-A-Bear Workshop Company-owned stores at the end of the second quarter totaled 330 -- 278 in North America and 52 in Europe. For the full-year 2008 the ...BBW

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[PDF] Using AGN to Observe the Growth of the Cosmic Web -
S Murray, C Jones, W Forman - 36th COSPAR Scientific Assembly. Held 16-23 July 2006, in …, 2006 - cxc.harvard.edu
... 6 Galaxies in the Cosmic Web Page 7. ... 9 Structure (0.25 < z < 0.50) ... 330 ksec, 33 10
ksec overlap 330 ksec, 33 10 ksec overlap 25% of Xbootes 25% of Xbootes ...
-

Learning and Revising User Profiles: The Identification of Interesting Web Sites -
M Pazzani, D Billsus - Machine Learning, 1997 - Springer
... learning user profiles would be a useful additional capability of Web search engines ...
the interesting pages, and subtract away a weighted fraction (0.25) of the ...

[PDF] Human Performance on Clustering Web Pages -
SA Macskassy, A Banerjee, BD Davison, H Hirsh - Proceedings of ACM SIGKDD International Conference on …, 1998 - athos.rutgers.edu
... employment .13 .63 0.38 0.38 .06 .50 0.27 0.25 ... began as an off-shoot of our observation
that it was difficult to build a system that clustered web pages when ...

High Speed and Ultra-Low Power 16X16 MAC Design using TG techniques for Web-based Multimedia System -
SM Lee, JH Chung, HS Yoon, MMO Lee - Proc. IEEE Design Automation Conf, 2000 - doi.ieeecomputersociety.org
... Power 16X16 MAC Design using TG techniques for Web-based Multimedia ... 82-613-330-3195
Fax: +82-613-330-2909 e ... design and we are now updating further 0.25um CMOS ...

[PDF] On Mining Web Access Logs -
A Joshi, R Krishnapuram - ACM SIGMOD Workshop on Research Issues in Data Mining and …, 2000 - ebiquity.umbc.edu
Page 1. On Mining Web Access Logs ... The proliferation of information on the world wide
web has made the personalization of this infor- mation space a necessity. ...

The detrital food web in a shortgrass prairie -
HW Hunt, DC Coleman, ER Ingham, RE Ingham, ET … - Biology and Fertility of Soils, 1987 - Springer
... Page 5. HW Hunt et al.: The detrital food web in a shortgrass prairie ... Fungivorous
nematodes 10 1.92 0.38 a 0.37 Phytophagous nematodes 10 1.08 0.25 a 0.37 ...

High speed and ultra-low power 16? 16 MAC deisgn using TG techniques for web-based multimedia system -
SM Lee, JH Chung, HS Yoon, MMO Lee - Proceedings of the 2000 conference on Asia South Pacific …, 2000 - portal.acm.org
... Power 16X16 MAC Design using TG techniques for Web-based Multimedia ... 82-613-330-3195
Fax: +82-613-330-2909 e ... design and we are now updating further 0.25um CMOS ...

EXTRUSION LAMINATE OF INCREMENTALLY STRETCHED NONWOVEN FIBROUS WEB AND THERMOPLASTIC FILM AND METHOD -
P Wu - EP Patent 0,688,263, 1998 - freepatentsonline.com
... 2 into the nip while the incrementally stretched web 9 was ... the order of 6.4 ?m to
200 ?m (0.25 to 8 ... melt temperatures on the order of about 260 - 330?C (500 ...

Scale and food-web structure-- from local to global -
ND Martinez, JH Lawton - Oikos, 1995 - JSTOR
... 0 0.00 - o -0.25 -25 - t ' l l l "j " 0 25 50 75 C 0.75 CO 0.25 0 0) 0.00 0 02 100
-0.25 0.0 *I ... Scale-dependent constraints on food-web structure ... B 330: 293-304 ...

[PDF] Experiments on Automatic Web Page Categorization for IR system -
H Mase - Technical Report Stanford, Calif: Standford Univ, 1998 - softlab.ntua.gr
... We defined 35 stopwords for Web pages by hand. ... Our system extracted 330 common words
from the training texts in the experiments described in section 4. ...

Source: Google Scholar
 

Mechanoluminescence event yields novel emissions, reactions

CHAMPAIGN, Ill. — Researchers at the University of Illinois report that a new study of mechanoluminescence revealed extensive atomic and molecular spectral emission not previously seen in a mechanoluminescence event. The findings, which appear online this month in the Journal of the American Chemical Society, also include the first report of gas phase chemical reactions resulting from a mechanoluminescence event.

Mechanoluminescence is light generated when a crystal, such as sugar or quartz, is fractured by grinding, cleaving or via other mechanical means. Sir Francis Bacon wrote about this phenomenon as early as 1605. Others have used the effect to impress, if not enlighten, others.

“You may, when in the dark frighten simple people only by chewing lumps of sugar, and, in the meantime, keeping your mouth open, which will appear to them as if full of fire,” Father Giambattista Beccaria wrote in “A Treatise Upon Artificial Electricity,” in 1753.

Article continues below and (thank you)
 
Scientists believe mechanoluminescence occurs as a result of the generation of opposite charges along the fracture plane of an asymmetrical or impure crystal. When the charges recombine the surrounding gas is ionized and emits light.

Mechanoluminescence that results from simple grinding or cleavage of a crystal can be quite weak and difficult to study. Late last year, U. of I. chemistry professor Kenneth Suslick and graduate student Nathan Eddingsaas reported in the journal Nature that a new technique, the sonication of crystal slurries, produced a much more intense mechanoluminescence than grinding. Sonication, the use of sound energy to agitate particles or other substances, causes high intensity collisions of crystal particles in liquid slurries.

The resulting mechanoluminescence is an order of magnitude brighter than that produced by grinding.

Sonication of liquids causes acoustic cavitation: the formation, growth and implosion of bubbles. This generates tremendous heat, pressure and shockwaves within the liquid that can exceed the speed of sound. Crystal particles suspended in a sonicated liquid collide and fracture, causing intense mechanoluminescence.

The new study involved the sonication of a slurry of recorcinol (sugar) crystals in the liquid paraffin, dodecane. When nitrogen or oxygen was bubbled through the sonicated slurry, the resulting emission spectrum was more than a thousand time more intense than that produced by grinding. The researchers also saw emission lines not previously reported in a mechanoluminescence event. These peaks on the mechanoluminescence spectra are evidence of gas phase chemical reactions during the event.

“When oxygen is present, chemical reactions take place that are similar to those that occur in the production of diamond films using an electrical discharge,” Suslick said. “The intense mechanoluminescence and chemical reactions produced by ultrasound give us a better understanding of mechanoluminescence, mechanochemistry and the effect of ultrasound on solids within a liquid.”

Editor’s note: To reach Kenneth Suslick, call 217-333-2794; e-mail: ksuslick@uiuc.edu.
 
 
 
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