5,137 research outputs found
Variations on the Supersymmetric Q6 Model of Flavor
We observe that a recently proposed supersymmetric model with Q6 flavor
symmetry admits a new CP violating ground state. A new sum rule for the quark
mixing parameters emerges, which is found to be consistent with data. Simple
extensions of the model to the neutrino sector suggest an inverted hierarchical
mass spectrum with nearly maximal CP violation (|delta_{MNS}| simeq pi/2).
Besides reducing the number of parameters in the fermion sector, these models
also provide solutions to the SUSY flavor problem and the SUSY CP problem. We
construct a renormalizable scalar potential that leads to the spontaneous
breaking of CP symmetry and the family symmetry.Comment: 22 pages, 7 figure
New technique for producing a strong multi-pole magnet
A new technique for producing strong multipole magnet is developed. A cylindrical magnet oriented with its easy axis of magnetization perpendicular to the cylinder axis is magnetized by a multipole magnetizer. This procedure results in a multipole magnet with a flux density almost sixty percent greater than the flux density produced by a multi-pole magnet which is not oriented. The technique is especially effective for producing small cylindrical magnets with many poles and agreement of a theoretical analysis with experimental results is very good, with deviations of no more than a few percent.</p
Statistical mechanics and large-scale velocity fluctuations of turbulence
Turbulence exhibits significant velocity fluctuations even if the scale is
much larger than the scale of the energy supply. Since any spatial correlation
is negligible, these large-scale fluctuations have many degrees of freedom and
are thereby analogous to thermal fluctuations studied in the statistical
mechanics. By using this analogy, we describe the large-scale fluctuations of
turbulence in a formalism that has the same mathematical structure as used for
canonical ensembles in the statistical mechanics. The formalism yields a
universal law for the energy distribution of the fluctuations, which is
confirmed with experiments of a variety of turbulent flows. Thus, through the
large-scale fluctuations, turbulence is related to the statistical mechanics.Comment: 7 pages, accepted by Physics of Fluids (see http://pof.aip.org/
ANALYSIS OF THE GOLF SLOPE SHOT BY GROUND REACTION
The purpose of this study was to develop a method for improving performance by weight transfer of slope shots. It is necessary to comprehend the mechanism in order to achieve effective movement of the slope shot. Slope shots have been used by many golfers, who trained those pattern of the golf swing.Weight transfer could be appeared with subjective observation alone in slope shots. It was became obvious that there was a difference among four golfers in the swing movement by compared the weight transfer of the slope shots. METHODS Subjects were a professional golfer (E N) and three amateur skilled golfers Upper-class (M N) middle-class (R E) and beginner-class (H H). All subjects were right handed male golfers and used the seven iron club. Subject stood on top of the plate facing uphill, downhill, uphill and sloping left, and downhill and sloping left. The degree of lie was set twenty degrees.The experiment carried out as follows that was attached to the measurement of body turbulence in (3 seconds) for during a slope shot action. Inputting with sampling frequency 200 Hz, 5 ms with A D converter device furthermore through, strain amplitude, filter from force plate a special program of computer was used that. These slope shots with 60 fps speed, from a front (about 10 M) of a subject by using VTR camera. RESULT AND DISCUSSION As for the ground reaction force on an uphill lie, professional golfer (E N) had much more path way of target foot than that of players of upper-class (M N) middle-class R.E. and beginner-class H.H. The resultant of body weight transfer in the downhill lie were compared among four golfers. Professional golfer (E N) showed loci of weight transfer among the target foot and the center of stance. The center of vertical force by the downhill lie were appeared at the orbit on target foot sole pressure of four subjects. The orbits of transfer foot were found to be two types patterns, orbit transferred at small circle with middle-class player, while the straight line were drew by beginner, and a square area were observed by professional golfer and upper-class player. REFERENCES James Rechords, Matin Farrell, James Kent and Robert Kraft (1985). Weight transfer patterns during the golf swing. Res Quart, 56, 361-365. Kazuaki Kawashima (1987). The biomchanics of golf swing: by weight transfer loci. Japan Journal of golf sciences, Vol. 1, No. 1, 34-40. Kazuaki Kawashima (1988).Changes on movement pattern of practices in golf swing. Proceeding of Japanese Journal of biomechanics, Vol. 9, 52-56
Optimal design of injection mold for plastic bonded magnet
The optimal design of an injection mold for producing a stronger multipole magnet is carried out using the finite element method and the direct search method. It is shown that the maximum flux density in the cavity obtained by the optimal design is about 2.6 times higher than that of the initial shape determined empirically. 3-D analysis of the nonlinear magnetic field in the injection mold with complicated structure is also carried out. The calculated flux distribution on the cavity surface is in good agreement with the measured one</p
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Rocking isolation of a typical bridge pier on spread foundation
It has been observed that after some earthquakes a number of structures resting on spread footings responded to seismic excitation by rocking on their foundation and in some cases this enabled them to avoid failure. Through application to a standard bridge supported by direct foundations, this paper discusses the major differences in response when foundation uplift is taken into consideration. Special focus is given on the modifications of rocking response under biaxial and tri-axial excitation with respect to uniaxial excitation. It is found that inelastic rocking has a significant isolation effect. It is also shown that this effect increases under biaxial excitation while it is less sensitive to the vertical component of the earthquake. Finally, parametric analyses show that the isolation effect of foundation rocking increases as the size of the footing and the yield strength of the underlying soil decreases
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