منابع مشابه
Imperial College,
We review the properties of classical p-brane solutions to supergravity theories, i.e. solutions that may be interpreted as Poincaré-invariant hyperplanes in space-time. Topics covered include the distinction between elementary/electric and soli-tonic/magnetic solutions, examples of singularity and global structure, relations between mass densities, charge densities and the preservation of unbr...
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Data from the first run of the BABAR detector at the PEP II accelerator are presented. Measurements of many rare B decay modes are now possible using the large data sets currently being collected by BABAR. An overview of analysis techniques and results on data collected in 2000 are described.
متن کاملImperial College,
We review the properties of classical p-brane solutions to supergravity theories, i.e. solutions that may be interpreted as Poincaré-invariant hyperplanes in space-time. Topics covered include the distinction between elementary/electric and soli-tonic/magnetic solutions, examples of singularity and global structure, relations between mass densities, charge densities and the preservation of unbr...
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Intense radiofrequency power in the form of pulses is applied to an ensemble of spins in a liquid placed in a large static magnetic Geld H&. The frequency of the pulsed r-f power satisGes the condition for nuclear magnetic resonance, and the pulses last for times which are short compared with the time in which the nutating macroscopic magnetic moment of the entire spin ensemble can decay. After...
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scriptions of genital and sexual development are clear and thorough. However, his description of the various genetic and hormonal factors involved in sexual development is skimpy and very difficult to follow. For example, Jost's classic experiments on the factors involved in determining sex and internal and external genital development are hardly mentioned, and certainly not dealt with in a way...
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ژورنال
عنوان ژورنال: Nature
سال: 1982
ISSN: 0028-0836,1476-4687
DOI: 10.1038/298510a0