[en] The Dense Optical Interface Module (DOIM) is a byte-wide optical link developed for the Run II upgrade of the CDF silicon tracking system [1]. The module consists of a transmitter with a laser-diode array for conversion of digitized detector signals to light outputs, a 22 m optical fiber ribbon cable for light transmission, and a receiver converting the light pulses back to electrical signals. We report on the design feature, characteristics, and radiation tolerance

[en] Sb-doped SnO₂ films have been prepared by the sol-gel method with the colloidal precursors. The colloidal precursors were prepared by adding urea into the SnCl₄ and SbCl₃ aqueous solution. The crystalline structure of the colloidal particles and the films are rutile-type structure examined by X-ray diffraction technique. The dependencies of electrical properties of the films on the firing temperature and Sb content have been studied. Conductivity and carrier concentration increase as the Sb concentration increases from 0 to 10%. The transmittance of the films firing at 600 deg. C was about 92% in the 450-800 nm wavelength range

[en] The Dense Optical Interface Module is a byte-wide optical link developed for the Run II upgrade of the CDF silicon tracking system (CDF Collaboration, The CDF-II Detector Technical Design Report, FERMILAB-Pub 96/390-E; S. Nahn, status of CDF silicon, Vertex 2002, Nucl. Instr. and Meth.). The module consists of a transmitter with a laser-diode array for conversion of digitized detector signals into light outputs, a 22 m optical fiber ribbon cable for light transmission, and a receiver converting the light pulses back to electrical signals. We report on the design feature, characteristics, and radiation tolerance

[en] ATLAS measurements of di-boson production processes involving combinations of W, Z and isolated photons are summarized. Measurements using data at 7 TeV as well as more recent results using data at 8 TeV are presented. The measurements are performed using leptonic decay modes, including the invisible decay Z → vv-bar, as well as semileptonic channels. Differential and total cross sections are presented and are used to place constraints on anomalous triple-gauge boson couplings. An overview of these results is given. (authors)

[en] There are heat losses during the cycle of a real engine that are neglected in ideal air standard analysis. In this paper, the effects of heat transfer on the net work output and the indicated thermal efficiency of an air standard Dual cycle are analyzed. Heat transfer from the unburned mixture to the cylinder walls has a negligible effect on the performance for the compression process. Additionally, the heat transfer rates to the cylinder walls during combustion are the highest and extremely important. Therefore, we assume that the compression and power processes proceed instantaneously so that they are reversible adiabatics, and the heat losses during the heat rejection process can be neglected. The heat loss through the cylinder wall is assumed to occur only during combustion and is further assumed to be proportional to the average temperature of both the working fluid and the cylinder wall. The results show that the net work output versus efficiency characteristics and the maximum net work output and the corresponding efficiency bounds are strongly influenced by the magnitude of the heat transfer. Higher heat transfer to the combustion chamber walls lowers the peak temperature and pressure and reduces the work per cycle and the efficiency. The effects of other parameters, in conjunction with the heat transfer, including combustion constants, cut-off ratio and intake air temperature, are also reported. The results are of importance to provide good guidance for the performance evaluation and improvement of practical Diesel engines

No abstract available

[en] Laminar jet flames are used in most domestic gas burners. However, the literature on combustion characteristics and thermal efficiencies of a single laminar impinging jet flame is very limited. Heating height is a significant operating parameter of a domestic gas stove, but it has received little attention in the literature. In this study, our aim is to simulate and examine the effect of heating height on the flame characteristics of a domestic gas stove. We emphasize the importance of heating height on flame structure, temperature distribution and thermal efficiency for low-Reynolds-number fuel-rich methane-air flames impinging normal to a plane surface, which has not been documented yet. Results show that flame structure, temperature distribution and thermal efficiency are greatly influenced by the heating height. With increasing heating height, the thermal efficiency first increases to a maximum value and then decreases. An optimum heating height, identified by the widest high temperature zone and the highest thermal efficiency, is achieved under the condition of Type-C flame burning, in which both the inner premixed flame and outer diffusion flame are open and diverge. Furthermore, we find that the optimum heating height increases with increasing methane concentration or injection velocity. Note that the maximum thermal efficiency occurs when the heating height is slightly lower than the tip of the inner rich premixed flame. This important characteristic can be applied to the design of domestic gas stoves, and it was not found in the available published work

[en] Structures for nuclear power plant facilities etc., must be designed to resist safely and effectively all types of load combinations that may be expected during their lifetime. The basic problem involves the combination of two or more responses caused by the application of concurrent dynamic loads with random time lag. The probabilistic outcome of the combination results is represented by a cumulative distribution function (CDF), obtained by using a Monte Carlo simulation procedure. This is a report detailing the finding of four specific items related to the problem of combinations of dynamic responses. These include: (a) a parametric study of combination characteristics, (b) a generic study of the methods and criteria needed for appropriate combinations in piping components, (c) a study of the validity, adequacy, limitations and applicability of the two criteria for response combinations given in the General Electric (GE) Report (NEDO-24010-2) entitled 'Basis of Criteria for Combination of Earthquake and Other Transient Responses by the Square Root of the Sum of the Square Method', (The Kennedy-Newmark Criteria), and (d) an evaluation of Mark II response data supplied by GE under this work. A comparison of GE and BNL procedures for generating CDF curves was also made

[en] The two-photon partial widths of several light-quark resonances formed in γγ collisions have been measured by the L3 detector at LEP. The η^'(958) is measured in the decay channel η^'→π⁺π^-γ. The π⁺π^-π⁰ final state is dominated by the a₂(1320) meson; there is evidence for a radially excited state, a₂^'(1750) of J^P=2⁺, produced predominantly in the helicity λ=2 state. The f₂(1270) is observed in the exclusive γγ→π⁺π^- process. The K_s⁰K_s⁰ final state is analyzed for the f₂^'(1525); an enhancement at 1750 MeV is observed. The charmonium states are reported for the η_c in several decay channels and the χ_c2 in its decay to γJ/ψ, J/ψ→e⁺e^- or μ⁺μ^-

[en] The two-photon reaction γγ → π+π-π0 was investigated using data collected with the Belle detector at KEKB. The spectrum was analyzed for resonance formation and interference between the dominant a2(1320) and higher mass radial excitation tensor states. The observation includes the newly reported a₂^'(1750), and evidences for a₂^''(1950) and a₂^'(2190)