Seishi Echigo

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  • Y Fukuda, T Hayakawa, E Ichihara, K Inoue, K Ishihara, H Ishino +115 others
  • 1998
We present an analysis of atmospheric neutrino data from a 33.0 kiloton-year (535-day) exposure of the Super{Kamiokande detector. The data exhibit a zenith angle dependent decit of muon neutrinos which is inconsistent with expectations based on calculations of the atmospheric neutrino ux. Experimental biases and uncertainties in the prediction of neutrino(More)
Super-Kamiokande is the world's largest water Cherenkov detector, with net mass 50,000 tons. Earth's atmosphere, and the K2K long-baseline neutrino beam with high efficiency. These data provided crucial information for our current understanding of neutrino oscillations, as well as setting stringent limits on nucleon decay. In this paper, we describe the(More)
Radiotherapy is widely used to treat cancer because it has the advantage of physically and functionally conserving the affected organ. To improve radiotherapy and investigate the molecular mechanisms of cellular radioresistance, we established a clinically relevant radioresistant (CRR) cell line, SAS-R, from SAS cells. SAS-R cells continue to proliferate(More)
2 The decay of 16 N is used to cross check the absolute energy scale calibration for solar neutrinos established by the electron linear accelerator (LINAC). A deuterium-tritium neutron generator was employed to create 16 N via the (n,p) reaction on 16 O in the water of the detector. This technique is isotropic and has different systematic uncertainties than(More)
  • M Nakahata, Y Fukuda, T Hayakawa, E Ichihara, K Inoue, K Ishihara +116 others
  • 1998
2 Abstract In order to calibrate the Super-Kamiokande experiment for solar neutrino measurements , a linear accelerator (LINAC) for electrons was installed at the detector. LINAC data were taken at various positions in the detector volume, tracking the detector response in the variables relevant to solar neutrino analysis. In particular, the absolute energy(More)
Pure trigeminal motor neuropathy is a very unusual disease that is characterized by trigeminal motor paralysis without trigeminal sensory disturbances and without the involvement of the other cranial nerves. We report a case of pure trigeminal motor neuropathy in a 70-year-old woman. The diagnosis was based on the results of clinical, electromyographic, and(More)
We present a case of bilateral temporomandibular joint (TMJ) internal derangement with closed lock, which was followed over 11 years using serial MRI after successful disk reduction with mandibular manipulation. MRI of the bilateral TMJs before and after mandibular manipulation followed by anterior repositioning splint showed that the disk improved from(More)