1,023 research outputs found

    Neurophysiological and behavioral studies of chimpanzees Semiannual report, Jan. 1 - Jun. 30, 1966

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    Techniques and bioinstrumentation for behavioral and neurophysiological studies of chimpanzees and Apollo application

    Monitoring brain function and performance in the primate under prolonged weightlessness Final report, 15 Aug. 1963 - 14 Aug. 1964

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    Summary of program for monitoring brain function and performance in primate under prolonged weightlessnes

    Summer Institute in Space Biology Final report, Apr. 1 - Nov. 30, 1968

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    Space biology laboratory on effects of aerospace environments on physiological and psychological performance of astronaut

    Neurophysiological and Behavioral Studies of Chimpanzees Semiannual Report, 1 Jul. - 31 Dec. 1966

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    Computer program for control of chimpanzee discrimination test analysis and electroencephalographic response dat

    Computer analysis of EEG data for a normative library Final report, Sep. 24, 1963 - Jan. 31, 1966

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    Computer analysis of electroencephalographic data for development of normative criteri

    Search for a time-varying electron antineutrino signal at Daya Bay

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    A search for a time-varying ν_e signal was performed with 621 days of data acquired by the Daya Bay Reactor Neutrino Experiment over 704 calendar days. The time spectrum of the measured ν_e flux normalized to its prediction was analyzed with a Lomb-Scargle periodogram, which yielded no significant signal for periods ranging from 2 hours to nearly 2 years. The normalized time spectrum was also fit for a sidereal modulation under the Standard Model Extension (SME) framework to search for Lorentz and CPT violation (LV-CPTV). Limits were obtained for all six flavor pairs eμ, eτ, μτ, ee, μμ and ττ by fitting them one at a time, constituting the first experimental constraints on the latter three. Daya Bay’s high statistics and unique layout of multiple directions from three pairs of reactors to three experimental halls allowed the simultaneous constraint of individual SME LV-CPTV coefficients without assuming others contribute negligibly, a first for a neutrino experiment

    Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay

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    We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor ν_e inverse β decay candidates observed over 1958 days of data collection. The installation of a flash analog-to-digital converter readout system and a special calibration campaign using different source enclosures reduce uncertainties in the absolute energy calibration to less than 0.5% for visible energies larger than 2 MeV. The uncertainty in the cosmogenic ^9Li and ^8He background is reduced from 45% to 30% in the near detectors. A detailed investigation of the spent nuclear fuel history improves its uncertainty from 100% to 30%. Analysis of the relative ν_e rates and energy spectra among detectors yields sin^22θ_(13) = 0.0856±0.0029 and Δm^2_(32)=(2.471^(+0.068)_(−0.070))×10^(-3)  eV^2 assuming the normal hierarchy, and Δm^2_(32) = −(2.575^(+0.068)_(−0.070))×10^(-3)  eV2 assuming the inverted hierarchy

    A high precision calibration of the nonlinear energy response at Daya Bay

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    A high precision calibration of the nonlinearity in the energy response of the Daya Bay Reactor Neutrino Experiment’s antineutrino detectors is presented in detail. The energy nonlinearity originates from the particle-dependent light yield of the scintillator and charge-dependent electronics response. The nonlinearity model is constrained by γ calibration points from deployed and naturally occurring radioactive sources, the β spectrum from ^(12)B decays, and a direct measurement of the electronics nonlinearity with a new flash analog-to-digital converter readout system. Less than 0.5% uncertainty in the energy nonlinearity calibration is achieved for positrons of kinetic energies greater than 1 MeV

    Comprehensive Spectral Analysis of Human EEG GENERATORS in Posterior Cerebral Regions

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    Human electroencephalogram generator spectral analysis in posterior cerebral region
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