12,924 research outputs found

    Event-related potentials elicited by spoken relative clauses

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    Sentence-length event-related potential (ERP) waveforms were obtained from 23 scalp sites as 24 subjects listened to normally spoken sentences of various syntactic structures. The critical materials consisted of 36 sentences each containing one of 2 types of relative clauses that differ in processing difficulty, namely Subject Object (SO) and Subject Subject (SS) relative clauses. Sentence-length ERPs showed several differences in the slow scalp potentials elicited by SO and SS sentences that were similar in their temporal dynamics to those elicited by the same stimuli in a word-by-word reading experiment, although the effects in the two modalities have non identical distributions. Just as for written sentences, there was a large, fronto-central negativity beginning at the linguistically defined "gap" in the SO sentences; this effect was largest for listeners with above-median comprehension rates, and is hypothesized to index changes in on-line processing demands during comprehension

    Conceptual design and feasibility evaluation model of a 10 to the 8th power bit oligatomic mass memory. Volume 2: Feasibility evaluation model

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    The partially populated oligatomic mass memory feasibility model is described and evaluated. A system was desired to verify the feasibility of the oligatomic (mirror) memory approach as applicable to large scale solid state mass memories

    Conceptual design and feasibility evaluation model of a 10 to the 8th power bit oligatomic mass memory. Volume 3: Operation manual

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    An operation manual is presented for the oligatomic mass memory feasibility model. It includes a brief description of the memory and exerciser units, a description of the controls and their functions, the operating procedures, the test points and adjustments, and the circuit diagram

    Expectations of fragment decay from highly excited nuclei

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    The statistical model is used to illustrate the consequences of a successive binary decay mechanism as the initial nuclear excitation is pushed towards the limits of stability. The partition of the excitation energy between light and heavy fragments is explicitly calculated, as are the consequences of the decay of the primary light fragments to particle-bound residual nuclei which would be observed experimentally. The test nucleus 100 44 Ru is considered at initial excitations of 100, 200, 400, and 800 MeV. Exit channels of n, p, and α; and 100 clusters of 3 ≤ Z ≤ 20 ≤ 4, 6 ≤ A ≤ 48 are considered from all nuclides in the deexcitation cascade. The total primary and final cluster yields are shown versus Z and initial excitation. The primary versus final yields are also shown individually for 12C, 26Mg, and 48Ca. We show how multifragmentation yields will change with the excitation energy due to a successive binary decay mechanism. Measurements that may be prone to misinterpretation are discussed, as are those that should be representative of initial nucleus excitation

    State space formulas for stable rational matrix solutions of a Leech problem

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    Given stable rational matrix functions GG and KK, a procedure is presented to compute a stable rational matrix solution XX to the Leech problem associated with GG and KK, that is, G(z)X(z)=K(z)G(z)X(z)=K(z) and supz1X(z)1\sup_{|z|\leq 1}\|X(z)\|\leq 1. The solution is given in the form of a state space realization, where the matrices involved in this realization are computed from state space realizations of the data functions GG and KK.Comment: 25 page

    All solutions to the relaxed commutant lifting problem

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    A new description is given of all solutions to the relaxed commutant lifting problem. The method of proof is also different from earlier ones, and uses only an operator-valued version of a classical lemma on harmonic majorants.Comment: 15 page

    State space formulas for a suboptimal rational Leech problem I: Maximum entropy solution

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    For the strictly positive case (the suboptimal case) the maximum entropy solution XX to the Leech problem G(z)X(z)=K(z)G(z)X(z)=K(z) and X=supz1X(z)1\|X\|_\infty=\sup_{|z|\leq 1}\|X(z)\|\leq 1, with GG and KK stable rational matrix functions, is proved to be a stable rational matrix function. An explicit state space realization for XX is given, and X\|X\|_\infty turns out to be strictly less than one. The matrices involved in this realization are computed from the matrices appearing in a state space realization of the data functions GG and KK. A formula for the entropy of XX is also given.Comment: 19 page
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