scientific american - 2003 02 - starquake on a magnetar
scientific american - 2003 02 - starquake on a magnetar
... streaks with tell-tale features in its wake.—Sarah Grahamwww.sciam.com SCIENTIFIC AMERICAN 23COPYRIGHT 2003 SCIENTIFIC AMERICAN, INC.24 SCIENTIFIC AMERICAN FEBRUARY 2003 CHRISTOPHER VON NAGY ... ponder.COPYRIGHT 2003 SCIENTIFIC AMERICAN, INC. STARQUAKE ON A MAGNETAR releases a vast amount of magnetic energy—equivalent to the seismic energy of a magnitude 21 earthquake—andunleashes a fireball ... reasons, a nonlethal and effec-tive knockout gas is a myth, maintains ElisaHarris, a researcher at the University of Mary-land and a former National Security Councilstaff member. “I just can’t...
- 83
- 496
- 0
scientific american - 2003 08 - are you a hologram
... says. One-micron-diameter latex beads carrying a negative electrical chargehad demonstrated a strong attraction when they wereplaced in a solution of water between two closely spacedparallel ... much weaker statementsabout global warming.logical consultant in Kew, Australia, and for-mer head of the Australian National ClimateCenter. But he says that “from a purely sta-tistical viewpoint, ... www.sciam.com SCIENTIFIC AMERICAN 21RANDY OLSON AuroranewsSCANMainstream climatologistsperceive flaws in a paper by WillieSoon and Sallie Baliunas, the twoHarvard-Smithsonian researcherswho...
- 83
- 671
- 0
scientific american - 1999 02 - a fractual walk down wall street
... into calculations, the para-dox disappeared.More “In Brief” on page 30News and Analysis28 Scientific American February 1999Mahatma Gandhi was mur-dered twice by Hindu na-tionalists, remarked ... in a home infestedwith fire ants and later developed a simi-lar eye malady.Ecologists also fear that the damagecould cascade. In New Caledonia, Was-mannia has benefited the population ofscale ... danger of retaliating with a nuclearweapon, and perhaps inadvertently trig-gering atomic war, is undeniable.Pervez Hoodbhoy, a physicist atQuaid-E-Azam University in Islamabad,Pakistan, argues...
- 85
- 533
- 0
scientific american - 2000 02 - galileo finds fire and brimstone on jupiter's moon io
... traces.To answer that, chemist John T. Arm-strong of the National Institute of Stan-dards and Technology used spectral-an-alyzer software and a database contain-ing high-precision x-ray ... collection and transportationinfrastructure, component manufactur-ers, raw materials suppliers and recy-clers to play a role.”And that’s the aim of the Internation-al Association of Electronics ... Fuller-ton and McEwan technologiesare distinct enough for both tobe patentable, a decision thatMcEwan hails as a vindication.McEwan has also been grant-ed additional patents for a mod-ification...
- 89
- 539
- 0
scientific american - 1993 02 - beating resistance in superconductors
... whichthey can draw irrigation water.The diÝerential in water access on theWest Bank is marked: on a per capita ba-sis, Jewish settlers consume about fourtimes as much water as Arabs. Arabsare not ... amount of cropland availableper capita by 2025 . Flooding and inade-quate national and community institu-tions for water control exacerbate thelack of land and the brutal poverty andturmoil ... Rhodes and Aaron KlugIt has long been predicted that a collision between a growing world populationand increasing environmental degradation would lead to civil and internationalstrife. A team...
- 91
- 547
- 0
scientific american - 1994 02 - do aerosols slow climatic warming
... cau-tion guides national leaders.Tactical nuclear weaponsÑusuallysmall-yield weapons meant for useagainst engaged forces on the battle-Þeld or against airÞelds, bases and for-ward transportÑseem ... U.S.used a total of about 1,000 planes dur-ing both the Vietnam and Korean wars.Humanitarian assistance and peace-keeping eÝorts in Bangladesh, Lebanonand Somalia have engaged mainly Ma-rine ... squadrons armed with the newestaircraft types: the F-117 Stealth Þght-ers, F-15s and F-16sÑAmericaÕs top-of-the-line ÞghtersÑand the sturdy A- 10ground-attack airplane. Marine and navyaviation...
- 89
- 481
- 0
scientific american - 1994 06 - was there a race to the moon
... super-position of states that have large quan-tum numbers is necessary for a wavepacket to demonstrate two hallmarkclassical features: spatial localizationand motion along an orbital path. ... deÞnition cannot sponta-neously fracture and revive in this way,but a quantum particle canÑand does. A classical analogy can explain manyfeatures of the quantum revivals. Inparticular, they can ... strong po-litical and public support. The NationalAeronautics and Space Administrationand its contractor teams also beneÞtedfrom a pool of skilled and highly moti-vated workers and managers....
- 87
- 538
- 0
scientific american - 1994 08 - red tides - a growing hazaed
... COLOMBIA CUBAECUADOREGYPTGREECEINDONESIA IRAN ISRAELLIBYAMALAYSIAPAKISTANPERUPHILIPPINESSAUDI ARABIA SINGAPORESOUTH AFRICASYRIA TAIWAN VENEZUELA ARGENTINABRAZILCHINA INDIANORTH ... 1994 Scientific American, Inc. A t noon on June 7, 1992, tense with anticipation, I watched a Delta II rocket lift oÝ its pad at Cape Ca-naveral, Fla., carrying the National Aero-nautics and ... appreciated. NewÞndings about star coral, or Montas-traea annularis, oÝer a dramatic exam-ple. This organism Òis sort of a lab ratof corals,Ó explains Nancy Knowlton ofthe Smithsonian Tropical...
- 87
- 563
- 0
scientific american - 1995 02 - bubbles turn sound into light
... The AKF has a data-base that combines on- site surveys andsatellite data into a Koala Habitat Atlas.It has begun to provide both a censusand an assessment of how much koalaliving space has ... standard for argon-argon radiometric dating. This variation on the potassium-argon technique pro-vides only a relative measure of age: a standard mineral of known age mustbe used with each analysis ... the World Bank on sub-Saharan Africa have revealed posi-tive correlations among poverty, fertilityand deterioration of the local environ-ment. Such data cannot reveal causalconnections, but...
- 83
- 482
- 0
scientific american - 1996 02 - saving malnourished minds
... South Dakota, Michigan, Ohio, Minnesota, Nebraska, Con-necticut and Georgia—now mandate fluoridation.Fluoridation has one well-documented drawback: it causes dental fluoro-sis, a condition that ... rabbits in an Austra-lian laboratory of the Commonwealth Sci-ence and Industry Research Organization. A Harebrained SchemeExperimental rabbit-killing virus runs amok in AustraliaMICHAEL CRAWFORDCSIROCopyright ... New Zealanderssoon noticed RCDÕs potential as an anti-rabbit agent, and the Australia andNew Zealand Rabbit Calicivirus Dis-ease Program was born. Funded bythe Commonwealth Science and Industry...
- 83
- 468
- 0
Từ khóa: chuyên đề điện xoay chiều theo dạngNghiên cứu tổ chức pha chế, đánh giá chất lượng thuốc tiêm truyền trong điều kiện dã ngoạiNghiên cứu tổ chức chạy tàu hàng cố định theo thời gian trên đường sắt việt namđề thi thử THPTQG 2019 toán THPT chuyên thái bình lần 2 có lời giảiGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitĐỒ ÁN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWANTrả hồ sơ điều tra bổ sung đối với các tội xâm phạm sở hữu có tính chất chiếm đoạt theo pháp luật Tố tụng hình sự Việt Nam từ thực tiễn thành phố Hồ Chí Minh (Luận văn thạc sĩ)Phát hiện xâm nhập dựa trên thuật toán k meansNghiên cứu về mô hình thống kê học sâu và ứng dụng trong nhận dạng chữ viết tay hạn chếĐịnh tội danh từ thực tiễn huyện Cần Giuộc, tỉnh Long An (Luận văn thạc sĩ)Thiết kế và chế tạo mô hình biến tần (inverter) cho máy điều hòa không khíQuản lý nợ xấu tại Agribank chi nhánh huyện Phù Yên, tỉnh Sơn La (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 15: Tiêu hóa ở động vậtGiáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vậtTrách nhiệm của người sử dụng lao động đối với lao động nữ theo pháp luật lao động Việt Nam từ thực tiễn các khu công nghiệp tại thành phố Hồ Chí Minh (Luận văn thạc sĩ)Đổi mới quản lý tài chính trong hoạt động khoa học xã hội trường hợp viện hàn lâm khoa học xã hội việt namMÔN TRUYỀN THÔNG MARKETING TÍCH HỢPQUẢN LÝ VÀ TÁI CHẾ NHỰA Ở HOA KỲ