1,176 research outputs found
Development of a UV/X-Ray Imaging Device Based on Large Areagas Photo-Multipliers
No full textAbstractAnew type high spatial resolution radiation detector based on UV scintillators + UV imaginggas photomultiplier is presented. The prototype UV detector consists of a 10cm×10cm μPIC,2GEMs,aUV transparent windowandaCsI photocathode deposited on the window or the surface of the upper GEM. The effective photo-sensitive area is ø34mm andthe readouts are 400um-pitch strips.Anewlydeveloped LuLiF4(Nd) crystal which emits 183nm photonsis directly coupled to the detector as the window. The detector was tested in pulse mode operation with 5.5MeV α particles from 241Am and 122keV γ rays from 57Co. The window images were clearly obtained and the position resolution of o(mm) is confirmed
Data for ''First simulations of day-to-day variability of mid-latitude sporadic E layer structures''
No full textOne file was added on July 21, 2020. (Caiondensity_average.nc)Two files were added on August 3, 2020. (ReadMe2_si_grl.pdf, S1.txt)The title was changed on August 3, 2020. (Before: Simulated Calcium Ion Density)One author was added on August 3, 2020. (Shinagawa Hiroyuki)ReadMe file was replaced on October 13, 2020.Two files were deleted on October 13, 2020. (ReadMe2_si_grl.pdf, S1.txt)Three files were added on October 13, 2020. (MeridionalWind_fig1.txt, VerticalWind_fig1.txt, ZonalWind_fig1.txt
Mid-Air Ultrasonic Stimulations of the Palm - The Influence of Frequency and Stimulus Duration on Perceived Intensity
No full textIt is known that the duration of a short stimulus affects the perceived intensity of both visual, auditory, and, vibrotactile events, but it is still unclear whether such a relationship also exists for mid-air ultrasonic inputs to the hand. Here we investigate this issue and show how the perceived intensity of focused ultrasonic stimulations of the palm is indeed systematically related to stimulus duration - a relationship that is, however, independent of modulation frequency. This is an important finding for the overall goal of providing perceptually stronger inputs and enlarging the repertoire of realistic mid-air haptic experiences.Human Information Communication Desig
Solar neutrinos in Super-Kamiokande
No full textAbstractRecently the concern with the effect of matter on the neutrino oscillation has been growing, because the possibility of mass hierarchy determination by next generation experiments through the matter effect has been recognized. We report an indication that the elastic scattering rate of solar 8B neutrinos with electrons in the Super-Kamiokande detector is larger when the neutrinos pass through Earth during nighttime. This is the first direct indication that neutrino oscillation probabilities are modified by the presence of matter. The observed the day-night asymmetry is −3.3±1.0(stat.)±0.5(syst.) for Δm212=4.84×105eV2, sin2θ12=0.311 and sin2θ13=0.025, which deviates from zero by 3σ. Since the elastic scattering process is mostly sensitive to electron-flavored solar neutrinos, a nonzero day-night asymmetry implies that the flavor oscillations of solar neutrinos are affected by the presence of matter within the neutrinos' flight path. Super-Kamiokande's day-night asymmetry is consistent with neutrino oscillations for 4×10−5eV2≤Δm212≤7×10−5eV2 and large mixing values of θ12 at the 68% C.L. We also report the measured recoil electron spectrum whose shape should reflect the transition between vacuum dominated oscillations (lower energy solar neutrinos) and matter dominated oscillations (higher energy solar neutrinos)
Amoeba Management and Enabling Control: A Field Study of Small and Medium-Sized Public Hospitals
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