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We present the results of searches for nucleon decay via n → ¯ νπ 0 and p → ¯ νπ þ using data from a combined 172.8 kt · yr exposure of Super-Kamiokande-I,-II, and-III. We set lower limits on the partial lifetime for each of these modes: τ n→¯ νπ 0 > 1.1 × 10 33 years and τ p→¯ νπ þ > 3.9 × 10 32 years at a 90% confidence level.
A search for the relic neutrinos from all past core-collapse supernovae was conducted using 1496 days of data from the Super-Kamiokande detector. This analysis looked for electron-type anti-neutrinos that had produced a positron with an energy greater than 18 MeV. In the absence of a signal, 90% C.L. upper limits on the total flux were set for several(More)
STUDY DESIGN A retrospective clinical study. OBJECTIVE To evaluate the outcomes of two-level (T12 and L3) pedicle subtraction osteotomy (PSO) for severe thoracolumbar kyphosis in ankylosing spondylitis (AS), and to discuss the surgical strategies of this surgery. BACKGROUND Cases were limited on the results of two-level PSO for correction of severe(More)
We develop tools for studying the control of underactuated mechanical systems that evolve on a configuration space with a principal fiber bundle structure. Taking the viewpoint of affine connection control systems, we derive reduced formulations of the Levi-Civita and the nonholonomic affine connections, along with the symmetric product, in the presence of(More)
We consider a gel as an immiscible mixture of polymer and solvent, and derive governing equations of the dynamics. They include the balance of mass and linear momentum of the individual components. The model allows to account for nonlinear elasticity, vis-coelasticity, transport and diffusion. The total free energy of the system combines the elastic(More)
a r t i c l e i n f o a b s t r a c t In previous studies, the optical properties of sulfate aerosols were employed to estimate the direct radiative forcing (DRF) due to nitrate aerosols. Ensuing errors have not been rigorously evaluated, which is a major objective of this study. First, we compared the optical properties of nitrate and sulfate aerosols in(More)
A new criterion for the global asymptotic stability of the equilibrium point of cellular neural networks with multiple time delays is presented. The obtained result possesses the structure of a linear matrix inequality and can be solved efficiently using the recently developed interior-point algorithm. A numerical example is used to show the effectiveness(More)
Low frequency electroacupuncture, which is commonly used in pain relief, is known to induce opioid-mediated analgesia. This study examined the contribution of the opioid system in mediating the anti-inflammatory effects of low frequency EA in a standard model of acute inflammation, the carrageenan-induced edema model. Carrageenan was injected in the hind(More)
PURPOSE To evaluate the clinical study efficacy and feasibility of 17 aged patients with lumbo-sacral tuberculosis treated by one-stage posterior transforaminal lumbar debridement, interbody fusion, and posterior instrumentation. METHODS 17 aged patients who suffered from lumbo-sacral tuberculosis were admitted into our hospital between March 2003 and(More)