scientific american special online issue - 2002 no 03 - the science of war - nuclear history

... WAR: THE SE- CRET HISTORY OF THE GER- MAN BOMB. Thomas Powers. Al- fred A. Knopf, 1993. SCIENTIFIC AMERICAN SPECIAL ONLINE ISSUE 14 The Science of War: Nuclear History COPYRIGHT 2002 SCIENTIFIC AMERICAN, ... Very soon after the July test, some 60 of us flew from Los Alamos to the North Pa- cific to assist in the assembly of these SCIENTIFIC AMERIC...

Ngày tải lên: 12/05/2014, 16:31

... KAMAJIAN 21 SCIENTIFIC AMERICAN SPECIAL ONLINE ISSUE NOVEMBER 2002 originally published April 1996 COPYRIGHT 2002 SCIENTIFIC AMERICAN, INC. SCIENTIFIC AMERICAN SPECIAL ONLINE ISSUE 22 The Search ... MILLER 12 SCIENTIFIC AMERICAN SPECIAL ONLINE ISSUE NOVEMBER 2002 COPYRIGHT 2002 SCIENTIFIC AMERICAN, INC. ly force us to take our search to the far...

Ngày tải lên: 12/05/2014, 16:31

... islands of Tuscany, which would eventually be joined to one anoth- er and the rest of Europe by the retreat of the sea to form the backbone of the Ital- ian peninsula. Large-bodied and small- brained, ... piece together the evolutionary history of our ex- tended family. Ongoing fieldwork promis- es to fill some of the gaps in our knowl- edge. But until then, we must...

Ngày tải lên: 12/05/2014, 16:38

... year. Honey, I Shrunk the Features ADVANCES IN the engineering of the silicon substrate are only part of the sto- ry: the design of the transistors con- structed atop the silicon has also im- proved tremendously ... served as proof of princi- ple in the strictest sense of the expression. The com- pany has not made commercial flash memories for years, so the inve...

Ngày tải lên: 12/05/2014, 16:39

... cluster of con- duction tissue cells collectively known as the sinoatrial node. This node, located at the top of the right atrium, establishes the tempo of the heartbeat; hence, it is of- ten referred ... along the surface of the septum (a wall dividing the two ventricles) to the tip of the heart (the apex) and, from there, up along the inner surface of t...

Ngày tải lên: 12/05/2014, 16:31

... researchers—including An- drew J. Leigh Brown of the University of Ed- inburgh, Jaap Goudsmit of the University of COURSE OF HIV INFECTION typically runs many years, during most of which the patient has no symptoms. ... EXCLUSIVE ONLINE ISSUE JULY 2 003 COPYRIGHT 2 003 SCIENTIFIC AMERICAN, INC. power of the peptide. (Some epitopes evoke more T cell replicatio...

Ngày tải lên: 12/05/2014, 16:32

... Mount Etna’s southern flank on October 30, 2002. 11 SCIENTIFIC AMERICAN EXCLUSIVE ONLINE ISSUE AUGUST 2 003 COPYRIGHT 2 003 SCIENTIFIC AMERICAN, INC. swers should be found in the theory of plate tectonics, ... position at the crossroads of these faults was the explanation for its volcanism. The presence of faults, how- ever, accounts only for the ability of ma...

Ngày tải lên: 12/05/2014, 16:36

... Protease/ helicase RNA polymerase Enve- lope 1 Envelope 2 Non- struc- tural 2 Nonstructural 3 Non- structural 4 Nonstructural 5 24 SCIENTIFIC AMERICAN EXCLUSIVE ONLINE ISSUE NOVEMBER 2 003 COPYRIGHT 2 003 SCIENTIFIC AMERICAN, ... numerous chal- lenges, and the prospects for eradicating the virus altogether appear dismal. At- 21 SCIENTIFIC AMERICAN EXCLUSIVE ONLINE ISS...

Ngày tải lên: 12/05/2014, 16:36

... appeared above the ground, the heat of the sun cooked them into ripe fruits and grains. If hu- mans gathered these foodstuffs, they could cook them further to create edi- ble dishes. Finally, the internal ... meal. 17th-Century Cooking B y the middle of the 17th century, however, physicians of a quite dif- ferent persuasion began to join the courts of northern Europe. Th...

Ngày tải lên: 12/05/2014, 16:36

... one. From the frog perspective, the evolution of the wave func- tion corresponds to a never-ending sliding from one of these 10 to the 10 118 states to another. Now you are in universe A, the one ... From their frog perspective, however, each of these alter egos is un- aware of the others and notices the branching merely as a slight randomness: a certain probability of...

Ngày tải lên: 12/05/2014, 16:36