the scientific american book of the brain

... feel and act as you do The Scientifi c American Day in the Life of Your Brain is written in the entertaining, informative, The Scientific American “Day in the Life of Your Brain takes us on a breezy, ... overall brain is oft en described in three parts, from the bottom up, just the way your brain evolved over millennia Th e primitive brain—the brain stem or hindbrain—that sits at the top of the spine ... and the articles of the many excellent contributors of Scientifi c American and Scientifi c American Mind: their work is in large part the basis of this book and is acknowledged in detail in the

Ngày tải lên: 12/05/2014, 16:39

... encoding: ISO-8859-1***START OF THE PROJECT GUTENBERG EBOOK THE CHILD'S BOOK OF AMERICAN A list of corrections will be found at the end of this e-book THE CHILD'S BOOK OF AMERICAN BIOGRAPHY by MARY ... in the Continental navy The colonists had but five armed vessels; the Alfred, on which Paul Jones served, was one of them These five ships were the beginning of the American navy The captain of ... navy officers,citizens, and sailors who had served under Jones Against the green of the trees, the uniforms of the officersand the white gowns of the ladies showed gleamingly Paul Jones wore the

Ngày tải lên: 18/02/2014, 08:20

... have passed through the cavity Thered laser beam traces the line of the in-frared laser used to excite the atoms; theblue beam marks the path of the atomsthemselves When in use, the entire appa-ratus ... excited These neu-rons propagate impulses along the au-ditory nerve to the brain We and others Þnd that the intensity of a sound wave of a given frequency isconveyed to the brain from the ear bythe ... aÝected pro-cesses are at the time of their disregula-tion and the ability of the organism ei-ther to compensate for or to repair thedamage If the damage disrupts the reg-ulation of cell growth or diÝerentiation,cancer

Ngày tải lên: 12/05/2014, 14:49

... development the progeny of those pole cells become the germ cells (the precursors of the eggs or of the sperm) The nuclei at the surface of other re-gions of the embryo undergo four fur-ther rounds of ... Furthermore, if the hotend of the rod is then plunged into ice, a wave of cooling will follow the wave of heat down the length of the metal In the same way, temperature tions at the surface of the ... within the earth can faithful- ly document the thermal history of thesolid surface, but meteorologists aregenerally more concerned about thetemperature of the air The thermal cou-pling of the atmosphere

Ngày tải lên: 12/05/2014, 14:49

... in the midst of another SCIENTIFIC AMERICAN April 1994 41 Copyright 1994 Scientific American, Inc. Trang 20The real wage of the average Amer-ican worker more than doubled between the end of ... generate a verb As they perform such tasks, the ßow ofblood to various parts of the brain changes as each becomes engaged The re-search presents some of the Þrst images of the human mind at work ... asmall part of the decline in the relativeimportance of manufacturing to theeconomy Why, then, has the share ofmanufacturing declined? The immedi-ate reason is that the composition ofdomestic

Ngày tải lên: 12/05/2014, 14:54

... followed the extinction of the dinosaurs at the end of the Mesozoic The bulk of. .. set of red-brown sandstones on the north side of the Nemegt Valley, near the base of a ... are crucial to reconstructing the past environment of the Gobi and... including the construction of the bony case of the brain and the design of the elongated limbs and digits ... of dinosaurs, mammals and other... Mongolian sandworm, across the moonscape of the Gobi One of the most important discoveries in the history of scientiÞc exploration came in the

Ngày tải lên: 12/05/2014, 14:59

... technical experts The NRC, which isthe operating arm ofthe National Academy of Sciences and theNational Academy ofEngineering, is proba-bly the most capable in theory of Þlling infor the OTA The NRCÕsdetailed ... Þnding the genes will helpscientists uncover the biochemistry ofmanic-depression ÒThere are a lot oftheories about neurotransmitters, but at the end of the day, when they Þndthe genes, theyÕre ... Recrea-tionsĨ continues under the reliable authorship of Ian Stewart of the Uni-versity of Warwick Shawn Carlson joins us as the new writer of ỊThe Am-ateur Scientist.Ĩ The subject of the column is one close

Ngày tải lên: 12/05/2014, 15:02

... of therelationship between the father andmother If the relationship is brief, Haigobserves, chances are that any otherchildren borne by the woman will bearthe genes of another man The longerthe ... movie of our watery planet The spacecraft examined the outer expanses of the earthÕs magnet-ic Þeld and took the Þrst mea-surements of the moonÕs far side since the days of the Apol-lo program These ... clear that in themidst of this tempest, with the mainscrews in the stern periodically lurch-ing out of the water, whether the ÒDPÓ SCIENCE AND THE CITIZEN Tempest on the High Sea The Ocean Drilling

Ngày tải lên: 12/05/2014, 15:03

... the New York Times for handing out blame in 1991 on the basis of a condemnatory draft report by the Of ce of Research Integrity (then the Of ce of Scientific Integrity) of the ... of absence The reshi-Kari, then at the Massachusetts In- quest came after the Of ce of Research stitute of. .. Dunbar found, the size of the neocortex predicts groupings of ... near the Hotel Metropole, London, November 14, to witness the departure of the motor carriages for their race to Brighton, 47 miles. The oc- casion of the race was the going into effect of the

Ngày tải lên: 12/05/2014, 15:16

... Thestrength of the foil (and hence the qual-ity of the weld) can be manipulated by changing the thickness of the layers,each of which are typically five to 2,000nanometers thick The thinner the ... Deuterium and the Big Bang Nuclei of this hydrogen isotope formed in the first moments of the big bang Their abundance offers clues to the early evolution of the universe and the nature of cosmic ... on the composi-tion and thickness of the layers Because the atoms are so close to oneanother and because of the speed of thereaction, there is little time for oxygenmolecules to mingle with the

Ngày tải lên: 12/05/2014, 15:18

... re-problems, all the way from the sun’s terior to the earth and out to the farthestreaches of the solar wind Some of its in-struments are now poised to resolve sev-eral other mysteries Two of them, theGOLF ... the heart of what the World WideWeb and the rest of the Internet constitute a gigantic store-houses of raw information and analysis, the database ofall databases Worries about the future of the ... percent of the raw meat sold in the U.S These strains secrete a toxin that binds to a type of protein molecule, known as a receptor, on the surface of the cellsthat line the wall of the intestine

Ngày tải lên: 12/05/2014, 15:21

... poison-ing in the occupants Extensive researches have been madefor the first time by Prof Emmerling of the Berlin University.The results seem to confirm the correctness of the theory thatthe dust ... first nets oftensnapped from the force of the speedingmarsupials (They now use modified,oversized butterfly nets.) impro-There was also the obstacle of coming the bias against the use of mar-supials ... before culturing them in an in-cubator They then sewed the cell-laden scaffolding into therat’s mesentery, the membrane that holds the intestine together.The bone tissue that grew on the scaffolding

Ngày tải lên: 12/05/2014, 15:30

... Africa, the locale of several of the most pernicious conflicts of the 1990s In 1998, under the prodding of Alpha Oumar Konaré, the vi-sionary president of Mali, the Economic Community of West ... for the bulk of arms sold on the international market These in-clude the five permanent members of the U.N Security Coun-cil—the U.S., Russia, China, the U.K and France—plus a num-ber of other ... decision, the EPA invoked the emer-gency provisions of the Safe Drinking Water Act, another first Further, the agency issued the order preventively— on the basis of potential, future pollution of water

Ngày tải lên: 12/05/2014, 16:03

... the Rookwood plant in the tual work of manufacture From the mix- ing of the clay to the withdrawal of the completed piece of ware from the kiln, a Rookwood specimen passes through the hands of ... crisis of the 1970s strengthened the hand of the more conservative industrialists of the North, who allied themselves with indus- trial segments in the South that had long been antiunion And then, ... N.Y., near the St. Lawrence River, is one of the latest and largest of the hydraulic electric power plants, which are one of the most signifi- cant features in engineering at the close of the nineteenth

Ngày tải lên: 12/05/2014, 16:06

... In the case of ichthyosaurs, the ring presumably helped to maintain the shape of the eye against the forces of water passing by as the ani-mals swam, regardless of depth. The diameter of the ... sharply with theold theory of uniform heating, which predicts that the tops of the loops, wherethe gas is thinnest and radiates heat poor- ly, should be the hottest (The bulk of thecorona is ... ECONOMICS The Bank of Sweden’s economics Nobel went to James J Heck-man of the University of Chicago and Daniel L McFadden of the University of California at Berkeley for their separate studies of theindividual

Ngày tải lên: 12/05/2014, 16:06

... AND THE BRAIN ■ HOW DO FLIES FLY? (SEE P. 48) The Paradox of the Sun’s Hot Copyright 2001 Scientific American, Inc.Copyright 2001 Scientific American, Inc. ASTROPHYSICS 40 The Paradox of the ... been the danger of suffocation, or of otherwise in- juring the body by a total stoppage of some of its function. A new application claims the merit of escaping the danger, according to the scientific ... The layering of the Milky Way bears that out. On the other hand, cold-dark-matter theories have trouble explaining the inferred number of satellite mergers, the shape of stellar streams and the

Ngày tải lên: 12/05/2014, 16:08

... complexity in the form of cellular au-tomata The second comes from James Carter, pro-the abalone diver and author of The Opro-ther Theory of Physics, proffering a “circlon” the-ory of the universe, ... ismisidentified as director of the U.S Depart-ment of Energy’s Office of EnvironmentalManagement His correct title is director ofthe Office of Basic and Applied Research in theOffice of Environmental Management ... For the heavy elements to be visible, they must lie between us and the bulk of the galaxy; otherwise there would be no lightfor them to absorb Thus, they must be moving away from thecenter of the

Ngày tải lên: 12/05/2014, 16:14

... now they were sitting on the throne of God, the only being higher than the president of the United States of America. They were members of the final American government. They would be responsible ... to them. Imagine all the pride in the history of America felt in one rush. They suddenly had proof of God, they were the most important men to have ever lived, they had jurisdiction over the ... the book you’re reading. So where’s the confusion? The book was about a writer in his fifties working on a book. In the future the book has yet to be written, even if it was written in the...

Ngày tải lên: 15/03/2014, 06:20

... initiative of the Scientic committee (SC) of EAAP. The Foundation aims to stimulate the quality of the scientic program of the EAAP meetings and to ensure that the science meets societal needs. The ... be the rst time Slovakia is going to host one of the worldwide most important scientic meetings of professionals working in the area of animal production. One of the main objectives of the ... bualo populations of Iraq using microsatellite markers 11 13 Jaayid, T.A. and Dragh, M.A. invited invited Book of Abstracts of the 63 rd Annual Meeting of the European Federation of Animal Science Bratislava,...

Ngày tải lên: 22/02/2014, 05:20

... methods they should be mindful of their own safety and the safety of others, including parties for whom they have a professional responsibility. To the fullest extent of the law, neither the Publisher ... master of cinema, takes us inside a cult of witches who usher in the birth of the son of Satan. If anyone in Hollywood has experienced the aftermath of evil, it’s Polanski. A year after the lm ... story ideas. In other occult lores, the vampire is thought of more as a psychic vampire. They believe that they can leave their grave in a spirit form instead of a physi- cal one. These psychic...

Ngày tải lên: 15/03/2014, 17:30