Search Results - (Author, Cooperation:S. M. Ahn)

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  1. 1
    S. Nik-Zainal ; H. Davies ; J. Staaf ; M. Ramakrishna ; D. Glodzik ; X. Zou ; I. Martincorena ; L. B. Alexandrov ; S. Martin ; D. C. Wedge ; P. Van Loo ; Y. S. Ju ; M. Smid ; A. B. Brinkman ; S. Morganella ; M. R. Aure ; O. C. Lingjaerde ; A. Langerod ; M. Ringner ; S. M. Ahn ; S. Boyault ; J. E. Brock ; A. Broeks ; A. Butler ; C. Desmedt ; L. Dirix ; S. Dronov ; A. Fatima ; J. A. Foekens ; M. Gerstung ; G. K. Hooijer ; S. J. Jang ; D. R. Jones ; H. Y. Kim ; T. A. King ; S. Krishnamurthy ; H. J. Lee ; J. Y. Lee ; Y. Li ; S. McLaren ; A. Menzies ; V. Mustonen ; S. O'Meara ; I. Pauporte ; X. Pivot ; C. A. Purdie ; K. Raine ; K. Ramakrishnan ; F. G. Rodriguez-Gonzalez ; G. Romieu ; A. M. Sieuwerts ; P. T. Simpson ; R. Shepherd ; L. Stebbings ; O. A. Stefansson ; J. Teague ; S. Tommasi ; I. Treilleux ; G. G. Van den Eynden ; P. Vermeulen ; A. Vincent-Salomon ; L. Yates ; C. Caldas ; L. V. Veer ; A. Tutt ; S. Knappskog ; B. K. Tan ; J. Jonkers ; A. Borg ; N. T. Ueno ; C. Sotiriou ; A. Viari ; P. A. Futreal ; P. J. Campbell ; P. N. Span ; S. Van Laere ; S. R. Lakhani ; J. E. Eyfjord ; A. M. Thompson ; E. Birney ; H. G. Stunnenberg ; M. J. van de Vijver ; J. W. Martens ; A. L. Borresen-Dale ; A. L. Richardson ; G. Kong ; G. Thomas ; M. R. Stratton
    Nature Publishing Group (NPG)
    Published 2016
    Staff View
    Publication Date:
    2016-05-03
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-01-09
    Publisher:
    Wiley-Blackwell
    Print ISSN:
    0094-8276
    Electronic ISSN:
    1944-8007
    Topics:
    Geosciences
    Physics
    Published by:
    http://www.wiley.com/wiley-blackwell

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Ahn, S. M. ; Freeman, Walter J.
    Springer
    Published 1975
    Staff View
    ISSN:
    1432-0770
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Computer Science
    Physics
    Notes:
    Abstract A study is made of the dynamical properties of mammalian olfactory bulb which is represented by a set of nonlinear differential equations. It is shown that when the system of the periglomerular population receives a stationary independent stochastic input from the primary olfactory nerves, the level of ongoing mean pulse rate depends only on the expected value of the input. It is also shown that if the mitral-tufted and granule population receives stationary independent stochastic inputs both from the primary olfactory nerves and centrifugal axons, then there exists a limit cycle detectable in the EEG and the phase of the limit cycle depends only on the expected values of the inputs.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00364165

    Articles: DFG German National Licenses
  4. 4
    Ahn, S. M. ; Freeman, Walter J.
    Springer
    Published 1974
    Staff View
    ISSN:
    1432-0770
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Computer Science
    Physics
    Notes:
    Abstract The neurons in the mammalian olfactory bulb sustain two types of synaptic feedback. The periglomerular cells excite each other and form a positive feedback loop. The mitral-tufted cells are excited by periglomerular neurons, and they excite granule cells and are inhibited by them. The last two neural populations form a negative feedback loop. This work contains mathematical proofs for the existence of steady state unvarying activity in periglomerular neurons, and of steady state oscillatory activity of mitral-tufted and granule cells, which is manifested in the EEG. The following predictions are made. 1) The level of mean ongoing pulse activity of the periglomerular population is determined by peripheral sensory and centrifugal input. 2) The interaction of mitral and granule populations determines a limit cycle detectable in the EEG. 3) The frequency of the limit cycle is determined by periglomerular and centrifugal input. 4) The steady and oscillatory pulse rates are stable, and if they are perturbed, they return to the levels preceding perturbation.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00271631

    Articles: DFG German National Licenses
  5. 5
    Ahn, S. M. ; Freeman, Walter J.
    Springer
    Published 1974
    Staff View
    ISSN:
    1432-0770
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Computer Science
    Physics
    Notes:
    Abstract It is shown that there exist spatial distributions of nonzero steady state mean pulse rates of the periglomerular and mitraltufted neuron populations and of nonzero EEG in the mammalian olfactory bulb. Such distributions are stable, i.e., if there are small perturbations, the population state variables return to the equilibrium states. It is predicted that the sensory and centrifugal inputs to the neuron populations in the bulb determine existence of such active states.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00271716

    Articles: DFG German National Licenses