scientific american - 2001 04 - whose blood is it anyway

... undertake major projects on an as-needed basis without the huge overhead of a central research facility. Whether Intel’s buy -it- when-you-need- it strategy can work more generally re- mains to be seen. The ... Gluckman of Saint-Louis Hospital in Paris and their co-workers reported curing Fanconi ane- mia —a potentially fatal genetic disorder— in a five-year-old boy using blood from his b...

Ngày tải lên: 12/05/2014, 16:08

... 120 LOW DISABILITY MODERATE DISABILITY HIGH DISABILITY DISTRIBUTION OF DEATHS 1900 1990 SOURCE: Social Security Administration PATTERNS OF DEATH AND DISABILITY are shifting as an epidemiologic transition occurs ... AMERICAN, 415 Madison Ave- nue, New York, N.Y. 1001 7-1 111, or fax (212) 35 5-0 408. Photocopying rights are hereby grant- ed by Scientific American, Inc., to li- braries...

Ngày tải lên: 12/05/2014, 14:49

... DENSITYTOTAL CHARGE DENSITY SPIN DENSITY POSITION NORMAL METAL CHARGE-DENSITY WAVE SPIN-DENSITY WAVE POSITION POSITION 0 0 0 0 SPIN-UPSPIN-DOWN Copyright 1994 Scientific American, Inc. April 1994 ... advertisers in this issue. Copyright 1994 Scientific American, Inc. more lethal diseases do, even though they aÝect a lot fewer people.Ó Endometriosis is a disease of rene- gade cells. Ti...

Ngày tải lên: 12/05/2014, 14:54

... represen- tative of what NIST is trying to do to- dayÓÑor, to be more precise, of what the White House is trying to do. It was very obvious when this admin- istration came in that NIST was part of its ... Steve Fenton cre- ated the full-page advertisement to raise the profile of his pro bono client, the Cancer Research Institute (CRI). This $5.4-million-a-year charity has, since 1953, r...

Ngày tải lên: 12/05/2014, 15:00

... was likewise left with little to show for its nearly $150-million investment and dropped IBM, with some critics accusing IBM of promising tech- nology it could not deliver. IBM and its successor ... Indeed, it is now clear that the political repercussions from Chornobyl accelerated the col- lapse of the Soviet empire. Because of the importance of this ca- lamity for all of humanity, it...

Ngày tải lên: 12/05/2014, 15:07

... seismic activity in the area, is particularly impressed with what Wessel was able to achieve using only the posi- tions of seamounts, without their dif - cult-to-determine ages. It s phenome- nal ... Analysis Scientific American April 1997 29 Copyright 1997 Scientific American, Inc. I t has been said that “Internet secu- rity” is an oxymoron. Privacy, ac- countability and restri...

Ngày tải lên: 12/05/2014, 15:23

... some committed them- selves to violence as a political act. The Internet —with its varied cast of charac- ters and its penchant for political discus- sion is in some ways very reminiscent of ... with computers. Now, as Tama- gotchis, the most famous brand of virtual pet, become the rage for girls, the lessons are shifting. “The transition is from objects-to-think-with to objects-to-nurtur...

Ngày tải lên: 12/05/2014, 15:35

... long-lasting water on Mars. Philip R. Christensen, a ge- ologist at Arizona State Universi- ty, disclosed that it had located a vast deposit of coarse-grained hematite, an iron-bearing miner- al. ... should steadily in- crease with distance. But it is easy to explain in an accelerating universe, be- cause acceleration decreases with dis- tance: earlier on in cosmic history, the density...

Ngày tải lên: 12/05/2014, 15:56

... information is at risk. As an ex- ample, he cites this winter’s admission by Web-advertising giant Doubleclick that it was matching its years-long database of Web-browsing habits with the names ... have missed it until we had an iso- late of the virus as well,” Reisen comments. This is true even though Cal- ifornia, unlike New York State, has an extensive, $70-million- a-year mosquito...

Ngày tải lên: 12/05/2014, 16:02

... considers discrimina- tion based on genetic traits to be illegal under the Ameri- cans with Disabilities Act of 1990, which safeguards the disabled from employment- based discrimination. The commission ... in the U.S. The Americans with Disabilities Act (ADA), which is de- signed to safeguard the disabled from employment-based discrimination, may have backfired. According to econo- mist Rich...

Ngày tải lên: 12/05/2014, 16:07