[en] We calculate small correction terms to gravitational potential on Randall-Sundrum brane with an induced Einstein term. The behaviors of the correction terms depend on the magnitudes of AdS radius k^-1 and a characteristic length scale λ of model. We present the gravitational potential for arbitrary k and λ at all distances

[en] We calculate the Casimir energies due to matter fields with various boundary conditions along two compact directions in T² compactification. We discuss whether the Casimir energies generate attractive or repulsive forces. On the theories with extra dimensions, the Casimir energy plays a crucial role in the mechanism for stabilizing the size of extra dimensions. Finally we argue a procedure of the application to Z₂ orbifold

[en] We explore a new solution to the μ-problem. In the scenario of SUSY-breaking mediation through anti-generation fields, we find that the Bμ term has its origin in a seesaw-type mechanism as well as in a loop diagram through gauge interactions. It is shown that the dominant contributions to the Bμ term are controlled by the flavor symmetry in the model. (author)

[en] The present invention provides an axis-adjuster of reactor incore structures, which can be attached/detached by remote operation to an upper lattice plate and a reactor axis support plate and can conduct axis adjustment by remote handling. Namely, an axis-adjustment pin of the present invention comprises two cylindrical rods having different diameters. The diameter of an upper rod is made greater than the diameter of a lower rod, and each of the central axes is displaced. The difference between a diameter of the lower rod and the diameter of the upper rod is greater than the amount of the displacement of the central axes. Such adjusting pin is rotated to attach/detach the axis-adjuster to/from the incore structure by remote operation. Upon exchanging operation of incore structures, since the device can be attached/detached to/from the upper lattice plate, and the reactor axis support plate and axis-adjustment can be conducted by remote handling, access of an operator to a place beneath the upper lattice plate or the reactor axis support plate is made unnecessary thereby enabling to facilitate operation. (N.H.)

[en] A radiation shielding member comprises a metal vessel and a liquid therein, and is disposed to the upper surface of a lower flange of a reactor core shroud. Waterproof hot wires are contained in the liquid and are connected to a power source disposed at the outside. Electric current is supplied to the hot wires to elevate the temperature of the liquid, and the temperature of the vessel is kept higher than an atmospheric temperature thereby suppressing generation of dew condensation or water droplets. In addition, a water repellent coating is applied to the shielding member itself to prevent deposition of water droplets. Further, the bottom of the shielding member is inclined, and a water droplet-recovering vessel is disposed at the lower portion of the shielding member, so that the water droplets collected by the inclination of the bottom are recovered to the water droplet recovering vessel. With such a constitution, access of an operator to the inside of a reactor pressure vessel is facilitated, and at the same time, the working circumstance at the reactor bottom can be improved. (I.N.)

[en] The paper indicates that there is profound connection between the surface technology and the particle physics. Historically the Casimir effect tied up three different researches, the particle physics and nano/micro technology and number theory. Such as the Casimir effect, it is expected that the surface technologies are necessary for the experimental verification of the higher dimensional theories proposed by the particle physics. Recently, the particle physics is suffering from the experimental verifications. From the point of view of the elementary particle physics, let us explain the importance of the surface technologies

[en] In the context of the weakly-coupled heterotic string, we propose a new model of mediating supersymmetry breaking. The breakdown of supersymmetry in the hidden sector is transmitted to anti-generation fields via gravitational interactions. Subsequent transmission of the breaking to the MSSM sector occurs via gauge interactions. It is shown that the mass spectra of superparticles are phenomenologically viable. (author)

[en] We derive the scalar potential in zero mode effective action arising from a de Sitter brane embedded in five dimensions with bulk cosmological constant Λ. The scalar potential for a scalar field canonically normalized is given by the sum of exponential potentials. In the case of Λ = 0 and Λ > 0, we point out that the scalar potential has an unstable maximum at the origin and exponentially vanishes for large positive scalar field. In the case of Λ < 0, the scalar potential has an unstable maximum at the origin and a local minimum. It is shown that the positive cosmological constant in dS brane is reduced by negative potential energy of scalar at minimum and that effective cosmological constant depends on a dimensionless quantity. Furthermore, we discuss the fate of our universe including the potential energy of the scalar. (author)

[en] In intensity-modulated radiation therapy (IMRT) and stereotactic irradiation using a linear accelerator, radiation is administered intermittently and one treatment session often requires 30 min or a longer time. The purpose of the present study was to investigate the effect of fractionation and dose per fraction on cell killing by irradiation in intermittent exposure. Murine EMT6 and SCCVII cells were used. The cells were irradiated to a total dose of 8 Gy in 2, 5, 10, 20 and 40 fractions over 15, 30 and 46 min. The cells were also given 8 Gy in a single fraction over 15, 30 and 46 min using lower dose rates (continuous prolonged radiation groups). As compared with the control group receiving a single dose of 8 Gy at 1.55 Gy/min, the cell surviving fraction generally increased in groups receiving fractionated or continuous prolonged radiation. There was a general trend for cell survival to increase with the fraction number up to 20 or 40 fractions in both cell lines. The effects of IMRT and linear accelerator radiosurgery given over 15 min or longer may be less than those of 1- or 2-fraction irradiation. There was a trend for radiation effect to decrease with fraction number. (author)

[en] The solution to the Euler-Lagrange equation is an extremal functional. To understand that the functional is stationary at local extrema (maxima or minima), we propose a physics experiment that involves using a soap film to form a catenoid. A catenoid is a surface that is formed between two coaxial circular rings and is classified mathematically as a minimal surface. Using the soap film, we create catenoids between two rings and characterize the catenoid in situ while varying the distance between the rings. The shape of the soap film is very interesting and can be explained using dynamic mechanics. By observing the catenoid, physics students can observe local extrema phenomena. We stress that in situ observation of soap-film catenoids is an appropriate physics experiment that combines theory and experimentation.