[en] When high-brilliance radiation is needed for experiments, insertion device sources are generally viewed on-axis. Off-axis emission of flux can be prodigious especially from wiggler sources having large emission fans. The on-axis and off-axis radiation emission characteristics from insertion device sources have been calculated extensively and are well known, but experimental verifications of some characteristics, particularly those associated with off-axis emission, are relatively few. Here measurements of the flux spectrum and apparent source size are described, as a function of horizontal emission angle, from the former X25 hybrid wiggler at the National Synchrotron Light Source (NSLS).

[en] Three different approaches of the basic concepts involved in designing and operating hydraulic machines and alike are presented. The essential general data, characteristic graphs, and similitude are described. An analysis using logical charts is presented in seven tables: turbomachines, flow and pressure regulation, construction, mechanical performance, stress resistance, use and economic aspects. These charts are illustrated with selected examples such as the ejectors of a BWR, and Bugey blowers

[en] The Gas-Cooled Fast Breeder Reactor (GCFR) Demonstration Plant uses three helium loops to transfer heat from the reactor core to the steam generators. Helium flow in each loop is provided by a circulator driven by a 24,000 horsepower electric motor. Experimental verification of the designs of the circulator, circulator service system, main and pony motors, main and pony motor controllers, loop isolation valve instrumentation and control systems is needed to demonstrate that operational and safety requirements are met. A GCFR helium circulator test facility sized for full design conditions is proposed. The circulator will be mounted in a large vessel containing high pressure helium which will permit testing at the same power, speed, pressure, temperature and flow conditions present in the (demonstration) plant. The electric drive motor for the circulator will obtain its power from an electrical supply and distribution system in which electrical power will be taken from a local utility grid via a transformer

[en] The article Cellular distribution of cadmium in two amaranth (Amaranthus mangostanus L.) cultivars differing in cadmium accumulation, written by Keyu Chi, Rong Zou, Li Wang, Wenmin Huo and Hongli Fan, was originally published electronically on the publisher’s internet portal (currently SpringerLink)

[en] The report contains the results of the Helium Circulator Auxiliary System Study performed as a part of the High Temperature Reactor Development Program. The major objectives of the study were to review and analyze the existing Fort St. Vrain (FSV) system (System 21) in an effort to identify and recommend modifications which would reduce system interactions, increase system stability, and improve the capability to mitigate system transients. The Helium Circulator Auxiliary System at FSV is comprised of several sub-systems which perform various functions to support the operation of the helium circulators. The primary functions of the system are to provide a source of clean, filtered water for lubrication of the circulator bearings and provide a dry, pressurized buffering gas to the circulator seals. The recommendations contained in this report are aimed at improving performance of the bearing water portion of the system

[en] Recently, we proposed and optimized dedicated multi-pinhole molecular breast tomosynthesis (MBT) that images a lightly compressed breast. As MBT may also be performed with other types of collimators, the aim of this paper is to optimize MBT with fan beam and slit-slat collimators and to compare its performance to that of multi-pinhole MBT to arrive at a truly optimized design. Using analytical expressions, we first optimized fan beam and slit-slat collimator parameters to reach maximum sensitivity at a series of given system resolutions. Additionally, we performed full system simulations of a breast phantom containing several tumours for the optimized designs. We found that at equal system resolution the maximum achievable sensitivity increases from pinhole to slit-slat to fan beam collimation with fan beam and slit-slat MBT having on average a 48% and 20% higher sensitivity than multi-pinhole MBT. Furthermore, by inspecting simulated images and applying a tumour-to-background contrast-to-noise (TB-CNR) analysis, we found that slit-slat collimators underperform with respect to the other collimator types. The fan beam collimators obtained a similar TB-CNR as the pinhole collimators, but the optimum was reached at different system resolutions. For fan beam collimators, a 6–8 mm system resolution was optimal in terms of TB-CNR, while with pinhole collimation highest TB-CNR was reached in the 7–10 mm range. (paper)

No abstract available

[en] For the simpler configuration of the cold gas incoming flow guide for the annular space to the circulating blowers between the pressure vessel jacket and the steam-raising unit jacket, it is proposed that the cold gas should flow into a riser pipe through cold gas ducts penetrating the compensation pipe bundle situated at the top end of the steam-raising unit jacket and is taken to the blower from there. The riser pipe is situated in the part of the hot gas deflection device running along the pressure vessel axis. (orig./HP)

[en] The interest of present study is concerned to the sedimentogenic characterization of fluvial conglomeratic sandstones that occur close to the top of Piramboia Formation.These deposits are interpreted as braided channel bar facies, deposited on alluvial fans at the border of desertic environment. The sandstones are fine to coarse, with variable percentage of gravel. These are dominantly quart zones and median scale trough cross-bedded. (author)

[en] A T.A.B(Testing, Adjusting and Balancing) technique, the basic technique of air handling facility, is one of the essential technical items which workers in charge of operation of facilities have to acquire. Especially, through scientific and reasonable inspective procedures, the reduction of energy and guarantee of designed skill have become influential important problems in our time rather than in the past days. Entrepreneurs have required more thorough verify of performances and procedure of test in order to raise the investment efficiency and reduce expenditure. For that reason, I hope that cooperator acquire objective and substantial knowledges about air handling facility so that they are helped from them