We extend our previous formulation of low-energy QCD in terms of an effective lagrangean containing operators of dimensionality d ≤ 6 constructed with pseudoscalars and quark fields, describing physics below the scale of chiral symmetry breaking. We include in this paper the vector and axial-vector channels. We follow closely the Extended Chiral Quark Model approach and consistently work in the large-N c and leading log approximation and take into account the constraints from chiral symmetry and chiral symmetry restoration. The optimal fit of all parameters gives further support to a heavy scalar meson with a mass ∼ 1 GeV and a value of the axial pion-quark coupling constant g A 0.55 to 0.66, depending on some assumptions concerning the Weinberg sum rules.
The WAVE experiments have been performed a t JAERI to investigate the CSI deposition onto the inner surface of pipe wall under typical severe accident conditions. It was shown that relatively large amount of CsI was deposited a t the upstream floor of the pipe and that larger amount of CsI was deposited on the ceiling than the floor a t the downstream. Analyses of the experiments have also been conducted with the three-dimensional thermohydraulic code. SPRAC, and the radionuclide transport analysis code, ART. The experimental results were well reproduced with ART by using peripherally subdivided pipe cross section and associated representative thermohydraulic information from SPRAC prediction. It was clarified through the present experiment and analyses that major deposition mechanisms for the chemical form of CsI are thermophoresis and condensation. Accordingly, the coupling of the FP behavior and the detailed thermohydrau!ic analyses was found to be essential in order to accurately predict the CsI deposition in the pipe, to which little attention has been paid in the previous studies.W.4 V E experiment, cesium iodide, aerosol. deposition. severe accident,
An optical head and a fast laser power control electro-optics using short wavelength laser diode was developed. This laser power control method reduces much of the laser noise, and, at the same time, rapidly regulate the laser power in order to compensate for mark shape. The relative intensity noise of the laser, lasing at 670 nm, was reduced -127dB/Hz. This noise level is enough low to use the short wavelength laser diode for high density recording. This method is able to set various writing power waveforms to avoid mark distortion. The recorded mark shapes compensated by this method were simulated according to thermal analysis. And an experiment of mark shape compensation was made using a write once medium. Symmetric mark shapes were got in case of (1 ,7) mark edge modulation, the minimum mark length is 0. 8 j.tm. This high recording density is equivalent to 1 .7 bit/p.m.
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