[en] The ARGUS experiment, running at the DORIS II storage ring, has been collecting data on e+e- collisions near 10 GeV region since the end of 1982. The ARGUS detector, designed specifically for large acceptance and high resolution spectroscopy in the UPSILON resonances region, has produced a prolific amount of new results in recent months. Some of these are presented here. The subject matters include topics from charm and beauty spectroscopy and weak decays of charm mesons, beauty mesons and the tauon

No abstract available

[en] The properties of the nanocrystalline as-deposited Fe-Si-O thin films fabricated by RF agnetron reactive sputtering method have been studied. The best magnetic softness obtained from as-deposited Fe_79.8Si_17.3O_2.9 thin films is the saturation flux density of 17.2 kG, coercivity of 3.1 Oe and effective permeability of about 1000 at 100 MHz. The electrical resistivity of Fe_79.8Si_17.3O_2.9 thin film is 35 μΩ cm

[en] Rice husk is a by-product of rice milling process, and a great resource as a raw biomass material for manufacturing value-added composite products. One of the potential applications is to use rice husk as filler for manufacturing lignocellulosic fiber-thermoplastic composites. This study was conducted to examine the silica distribution in rice husk in preparation to use it as reinforcing filler for thermoplastic polymers. Microscopic techniques, such as light microscopy, scanning electron microscopy and field-emission SEM (FE-SEM) were used to observe the surface and internal structure of rice husk. Microscopic examination showed that two main components of husk, lemma and palea consisted of outer epidermis, layers of fibers, vascular bundles, parenchyma cells, and inner epidermis, in sequence from the outer to the inner surface. Histochemical staining showed that epidermal and fiber cell walls were lignified, and the walls of parenchyma and lower epidermal cells were not lignified. The outer epidermal walls were extremely thick, highly convoluted and lignified. The outer surface of both lemma and palea were conspicuously ridged. The energy dispersive X-ray micro-analysis attached to the FE-SEM provided information on the distribution of silica in the husk. Most of the silica was present in the outer epidermal cells, being particularly concentrated in the dome-shaped protrusions. These observations provided valuable background information on the organization of husk tissues and the distribution of silica, which will help optimize processes related to the use of rice husk for making lignocellulosic fiber-thermoplastic composites in our future work

[en] The influences of O₂ partial pressure on saturation magnetization, coercivity and effective permeability of the as-deposited Fe-Sm-O thin films, which were fabricated by RF magnetron reactive sputtering method, were investigated. The nanocrystalline Fe_83.4Sm_3.4O_13.2 thin film fabricated at O₂ partial pressure of 5% exhibited the best magnetic softness with a saturation magnetization of 1.43 MA/m, coercivity of 65.2 A/m and effective permeability of about 2600 in the frequency range from 0.5 to 100 MHz. The electrical resistivity of Fe_83.4Sm_3.4O_13.2 was 130 μΩ cm. The microstructures and electrical resistivity were investigated in this work

[en] Local M-H loops have been measured on the free layer of a magnetic tunnel junction multilayers using the magneto-optical Kerr effect system, with 2 μm spatial resolution. The relatively irregular variations of coercivity H_C (∼17.5 Oe) and exchange coupling field H_E (∼7.5 Oe) are revealed in as-deposited sample prepared by the DC magnetron sputtering. After 200 deg. C annealing, H_C decreases to 15 Oe, while H_E increases to 20 Oe with smooth local variation. Two-dimensional plots of H_C and H_E show the symmetric saddle shapes with their axes aligned with the pinned layer, where both H_C and H_E variations along free-layer axis are larger than those along pinned-layer axis. The increasing slope per micrometer of normalized H_C and H_E are the same near the junction edge along free-layer direction irrespective of junction size, giving the relatively uniform H_C and H_E for wider junction size

[en] The purpose of this study is to develop a system dynamics model for the assessment of organizational and human factors in the nuclear power plant safety. Previous studies are classified into two major approaches. One is the engineering approach such as ergonomics and Probabilistic Safety Assessment (PSA). The other is socio-psychology one. Both have contributed to find organizational and human factors and increased nuclear safety However, since these approaches assume that the relationship among factors is independent they do not explain the interactions between factors or variables in NPP's. To overcome these restrictions, a system dynamics model, which can show causal relations between factors and quantify organizational and human factors, has been developed. Operating variables such as degree of leadership, adjustment of number of employee, and workload in each department, users can simulate various situations in nuclear power plants in the organization side. Through simulation, user can get an insight to improve safety in plants and to find managerial tools in the organization and human side

[en] The magnetic properties of FeSmO films have been investigated in conjunction with thermal treatment. The FeSmO films were prepared by the RF magnetron sputtering method in Ar atmosphere. The film annealed at 500 deg. C had the good soft magnetic properties due to the grain growth of α-Fe

[en] In order to assess the difference in growth and development between the stimulated and natural pregnancies, we compared the sonographic measurement of early embryos from the fifth to seventh gestational week, in terms of mean size of gestational sac, crown rump length, fetal heart rate and yolk sac size between 26 ovulation stimulated pregnancies and 38 natural pre gnancies. The two groups were compared by multiple regression analysis, The data suggest that there is attend that embryos smaller in stimulated pregnancies though significant statistical differences was not proved

[en] We have developed an atom trap trace analysis (ATTA) system to measure Kr in Xe at the part per trillion (ppt) level, a prerequisite for the sensitivity achievable with liquid xenon dark matter detectors beyond the current generation. Since Ar and Kr have similar laser cooling wavelengths, the apparatus has been tested with Ar to avoid contamination prior to measuring Xe samples. A radio-frequency plasma discharge generates a beam of metastable atoms which is optically collimated, slowed, and trapped using standard magneto-optical techniques. Based on the measured overall system efficiency of 1.2 × 10⁻⁸ (detection mode), we expect the ATTA system to reach the design goal sensitivity to ppt concentrations of Kr in Xe in <2 h