scientific american - 2002 05 - a fire within - inflammation''s link to heart attacks

... WITHIN Inflammation’s Link to Heart Attacks AFIRE WITHIN Inflammation’s Link to Heart Attacks COPYRIGHT 2002 SCIENTIFIC AMERICAN, INC. BSIP/SERCOMI Photo Researchers, Inc. (top); IMAGE COURTESY OF MALIN ... INC. 42 SCIENTIFIC AMERICAN MAY 2002 AUTOMOBILE NAVIGATION Dashboard navigation systems that display a map and give you directions are becoming increasingl...

Ngày tải lên: 12/05/2014, 16:12

... sticky plaques lining diseased arteries. If a causal relation can be established, then treating gum disease early may prevent hun- dreds of heart attacks every year. At least half of all Americans ... then a graduate student studying bird be- havior, was camped near a Kansas garbage dump. As he waged a three-day battle against his sea of troubles, he contemplated the interactions...

Ngày tải lên: 12/05/2014, 16:08

... underlying scaling law, a mathematical relation that gives the statistical spread of events for a given area and magni- tude. According to this law, earthquakes clus- ter in the same way at a range of ... whether a vaccine that falls some- what short of that mark could be accept- 40 SCIENTIFIC AMERICAN JUNE 2002 ■ Final results from the first large-scale test of a possible A...

Ngày tải lên: 12/05/2014, 16:12

... upshot is that a broad- caster has more space than is needed to trans- mit a program. This management approach dates back to the 1920s, when a certain amount of wasted space was necessary for the technology ... special projects editor. www.sciam.com SCIENTIFIC AMERICAN 39 A broadcast version of articles in this is- sue will air August 27 on National Geo- graphic Today, a pro...

Ngày tải lên: 12/05/2014, 16:14

... official NASA images. The laboratory team has now received a creative help- ing hand from other scientists who are taking advantage of the wide dissemination of the Magellan data and the ready availability ... Encyclo- paedia Britannica. Converting that giant catalogue of ra- dar echoes into intuitively meaningful pictures posed a challenge to researchers at the Jet Propulsion Laborato...

Ngày tải lên: 12/05/2014, 14:49

... by ana- lyzing the strategies available to a dictator seeking to maximize personal and political power,Ó Haggard wrote in an article for Over- seas Development Cor- poration, a Washington- based ... trade practices. A 1,000-Year-Old Habit A lthough humans probably began sampling tobacco during the Þrst millennium, based on Mayan stone carv- ings dated at about A. D. 600 to 900...

Ngày tải lên: 12/05/2014, 15:01

... on. SCIENTIFIC AMERICAN August 1995 45 PHILIP MORRISON at Los Alamos Labo- ratory in 1945. LOS ALAMOS NATIONAL LABORATORY (INSET)UPI/BETTMANN ATOMIC SCIENTISTS gather at a base in the Marianas ... ßooding are a reality. With half the planetÕs pop- ulation living in coastal areas, ancient and modern data suggest we may be in a madhouse again. ÑChristina Stock R arely has a medical...

Ngày tải lên: 12/05/2014, 15:01

... unin- tegrated, hard -to- maintain, impossible- to- manage, contractor-dependent is- lands of automation.” Because the law “does not articulate what to do with what is already in place and what hap- pens ... iden- tified—reinforces that grip by inhibit- ing monoamine oxi- dase B (MAO B), an enzyme that de- grades dopamine. Looking at PET scans, Joanna S. Fowler and her col- leagues at Brook...

Ngày tải lên: 12/05/2014, 15:08

... fevers, birth complica- tions and respi- ratory symp- toms. Neurologi- cal, psychiatric and ophthalmic diseases were also most preva- lent among the most heavily ex- posed. In an ac- companying pa- per, the ... dielectrics. Nano- glass, a joint venture between Allied- Signal and a New Mexico start-up called NanoPore, has crafted a silicon dioxide material with air-filled pores that can b...

Ngày tải lên: 12/05/2014, 15:23

... connected to a small antenna —“which could be as simple as a one-centimeter spiral of alu- minum foil,” Vasundara Varadan has- tens to add —each comb will tune in to any radio signal whose wavelength matches ... ever in- creasing rate —an acceleration that the standard big bang model could not ac- count for were there no antigravity. Falling Cancer Rates Americans appear to have w...

Ngày tải lên: 12/05/2014, 15:36