scientific american great moments in space exploration
Solar and Space Physics and Its Role in Space Exploration doc
... Lockheed Martin Corporation (retired) JOSEPH K. ALEXANDER, Director Appendixes 8 SOLAR AND SPACE PHYSICS AND ITS ROLE IN SPACE EXPLORATION variations in solar output so as to understand their ... Lennard A. Fisk, Chair Space Studies Board 6 SOLAR AND SPACE PHYSICS AND ITS ROLE IN SPACE EXPLORATION FIGURE 1.1 The heliospheric systemthe Sun...
Ngày tải lên: 14/03/2014, 10:20
Breaking the Slump: How Great Players Survived Their Darkest Moments in Golf—and What You Can Learn from Them pot
... one thing keeping you from play- ing well again. You. ” breaking the slump 40 Verplank had extraordinary talent, but he also had something else that proved a great and unlikely factor in his ... there staring at the clouds. “And I said to myself, What the fuck am I going to the course for?’ I said, What are your intentions? What do you want to do? Do you want to...
Ngày tải lên: 31/03/2014, 23:20
scientific american - 1993 02 - beating resistance in superconductors
... bit longer; for instance, imipenem is [5R-[5␣, 6␣(R*)] ]-6 -( 1-hydroxyethyl )-3 - [[ 2-[ (iminomethyl)amino]ethyl]thio ]-7 - oxo-1-azabicyclo[3.2.0]hept-2-ene-2-car- boxylic acid. Primaxin was created ... C C Zn FINGERLIKE UNIT FINGERLIKE UNIT LINKER DNA-BINDING AMINO ACIDS DIMERIZATION REGION CYSTEINE ZINC V A he detailed structure of the DNA-binding domain of the es- trogen re...
Ngày tải lên: 12/05/2014, 14:48
scientific american - 1993 06 - tuning in the radio signals of ancient galaxies
... nearby radio- emitting galaxies. The contour lines map out the intense radio emanations from 4C 41.17. Astronomers are debating why the shape of the radio source around the more distant of these so-called ... matter” in the scientific argot); the remainder must be the myste- rious dark matter. White finds that in the inner regions of the Coma cluster, 11...
Ngày tải lên: 12/05/2014, 14:49
scientific american - 1994 03 - visiting yourself in the past
... of the original miner- als in the peridotite. Some minerals, such as clinopyroxene, melt more easi- ly than do others and hence rapidly de- crease in abundance during the melt- ing. Moreover, the ... RESEARCH Copyright 1994 Scientific American, Inc. 20 SCIENTIFIC AMERICAN March 1994 In the ÒnaiveÓ quark model, one of the three quarks spins in a direction oppo-...
Ngày tải lên: 12/05/2014, 14:54
scientific american - 1994 10 - special issue - life in the universe
... NUMBER 246 8101 2141618202224262830 H He Li Be C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn B ABUNDANCE 10 12 10 11 10 10 10 9 10 8 10 7 10 6 10 5 10 4 10 3 10 2 10 0 Copyright 1994 Scientific American, Inc. L ike the lapis lazuli gem it resembles, the blue, cloud-enveloped planet ... geolo- gists to determine that the accretion of th...
Ngày tải lên: 12/05/2014, 14:58
scientific american - 1995 01 - warning - digital documents in danger
... transparent as its internal order increases. It consists of cross- linked chains of amino acids; each chain contains 100 or more repetitions of the sequence valine-proline-glycine- valine-glycine. ANN ... pro- duced netrin-1 and attracted axons as òoor-plate cells would. Although both netrin-1 and netrin-2 were present in the chick membrane, òoor-plate cells make only netrin-1. ÒThe netrin...
Ngày tải lên: 12/05/2014, 15:00
scientific american - 1995 11 - guardian cells in the brain
... macro- phagelike cells responding to the dam- age would be residents of the brain tis- sue, not interlopers from the blood. Fi- nally, they examined the brain region containing the remains of the ... of the brain re- gion in which the microglia find themselves. If the cells have enough space, they may become bushy (left ). If the cells have to fit in among...
Ngày tải lên: 12/05/2014, 15:02
scientific american - 1996 06 - the space station
... area as the station s major mission What Good Is the Space Station? Copyright 1996 Scientific American, Inc. mestic company was in a position to de- velop or manufacture high-end lithog- raphy ... elements (radionuclides) out of the spent fuel or vitrified high-level waste, then carries them into the groundwater. People would be exposed if they used the wa- ter for any of...
Ngày tải lên: 12/05/2014, 15:08
scientific american - 1998 05 - six months in space
... semiconductors include Alq 3 , - NPD and a red-light-emitting molecule called DCM, which is also used in organic-based lasers and whose full formula is 4-( dicyano- methylene )-2 -methyl- 6-( 4-dimethylaminostyryl )-4 H-pyran. Light, ... the QTL for reading disability identified a reading-disabled member of a twin pair and then obtained reading scores for the other twin —the “co-t...
Ngày tải lên: 12/05/2014, 15:36
scientific american - 1998 10 - how hackers break in
... chromosomes. WI-18742 WI-19183 WI-8378 WI-18562 X54869 WI-19841 WI-11709 WI-7972 WI-18350 WI-7963 WI-7785 WI-7220 WI-20441 WI-21513 WI-4540 WI-19766 EST160888 WI-7321 L42611 WI-19201 IB3071 TIGR-A003N21 WI-6928 EST353379 WI-563 WI-14580 WI-14856 WI-21627 WI-7189 EST161832 WI-15953 1244 WI-1241 X52011 WI-3674 WI-9760 WI-597 WI-20146 WI-9064 EST132369 WI-18984 WI-19856 WI-18740 WI-6962 WI-1900...
Ngày tải lên: 12/05/2014, 15:47
scientific american - 1999 01 - revolution in cosmology
... fainter bea- cons that flared still longer ago in galaxies that are much, much farther away. Surveying Space-time with Supernovae Scientific American January 1999 51 0.00 001 0.0 001 0. 001 0 .01 0.1 1 RELATIVE ... chem- istry of life while fending off attacks from soil-dwelling, non-car- bon-based organisms. The key was active watching —stopping the videotape and discussing the co...
Ngày tải lên: 12/05/2014, 15:51
scientific american - 1999 04 - endless space (maybe not)
... topology. PETER MURPHY Copyright 199 9Scientific American, Inc. GEMINI: A NEW EYE OPENS ON THE HEAVENS Mapping the Shape of Space ENDLESS SPACE? (maybe not) see page 90 APRIL 1999 $4.95 www.sciam.com A ... to take 200 million Americans with us.” —Glenn Zorpette News and Analysis Scientific American April 1999 47 Copyright 199 9Scientific American, Inc. commentary in N...
Ngày tải lên: 12/05/2014, 15:56
scientific american special edition - 1999 vol 10 no1 - the future of space exploration
... Remaking the Red Planet The Stardust spacecraft races ahead of Comet Wild 2 QUARTERLY $5.95 SCIENTIFIC AMERICAN PRESENTS THE FUTURE OF SPACE EXPLORATION Quarterly Volume 10, Number 1 Copyright 1999 Scientific ... delayed the as- sembly of the space station and prompted U.S. officials to redesign the station to reduce their reliance on Russia. NASA Copyright...
Ngày tải lên: 12/05/2014, 16:24
scientific american great moments in space exploration
... Peter Jedicke Scientific American: Great Moments in Space Exploration Copyright â 2007 by Infobase Publishing Scientific American is a registered trademark of Scientific American, Inc. Its use ... Congress Cataloging -in- Publication Data Jedicke, Peter. Scientific American. Great moments in space exploration / Peter Jedicke. p. cm. Includes bibliographical...
Ngày tải lên: 28/01/2015, 17:42