[en] If the luminosities and the masses of the components of a binary system are known, it is possible to determine from the diagrams presented here, the type of configuration of equipotential surfaces that correspond to it

[en] It is of primary importance to properly estimate the fraction of the coments which leave sizable core or shell of stony material after losing volatile components (extinct comets), both in order to determine the dominant source of Apollo-Amor (AA) objects and to get information on the internal structure of cometary nuclei. The purpose of this paper is to estimate an upper limit of the fraction of asteroid-like survivors among extinct (EX) comets without ambiguity of the source as far as possible. The author also intends to understand the population of EX comets within the framework of orbital evolution of long-period (LP) comets. For those purposes, he restricts his treatment to the LP comets with 0.5 < q < 1.5 AU and 60⁰< i < 120⁰. (Auth.)

[en] Exhaled droplets of an infected person can spread diseases with the expiratory flows in indoor environments. This work focuses on how the thermal stratification affects the evaporation and dispersion of exhaled droplets by using a theoretical integral model. Pure water droplets with different diameters (10-240μm) are exhaled and disperse with different RHs (0, 30%, 50% and 60%). Results show that for medium droplets (50-170μm), the thermal stratification can obviously weaken the evaporation of droplets due to less heat and mass transfer between droplets and ambient air. The droplets were similarly influenced when the ambient RH increases from 0 to 50%, particularly, the 50μm droplets showed an obvious fluctuation trend with the jet flow at the lockup height in the stratified environment. When RH increased to 60%, a possible condensation phenomenon occurred on droplets, increasing the suspending time of droplets in the air. This theoretical model will be useful to control infectious diseases in rooms, especially when the thermal stratification exists. (paper)

[en] The eclipsing variable SV Cen has a rapid change in period caused by mass loss. Unexplained phenomena are discussed. These are: a change in the depth of the minima; the existence of a 33 year period in the orbital period variation; and the presence of a shorter period of about 4-6 years in the period-epoch diagram

[en] Process modeling of conveyer dryer for cellulosic fibre drying demands many fundamental insights. Present study highlights detailed cellulosic fibre drying Aspects like mass transfer correlation relating mass transfer rate with process conditions, normalized drying curve and critical moisture content. Cellulosic fibre drying follows falling rate period, where rate of mass transfer decreases with moisture content. Conveyer dryer process model for commercial cellulosic fibre drying was developed and validated successfully. Moderate drying strategy derived based on developed process model and drying fundamentals was deployed at commercial scale which helped in reducing the moisture variability. (Author)

No abstract available

[en] Pacific Northwest National Laboratory (PNNL) has established the 300 Area Integrated Field-Scale Subsurface Research Challenge (300 Area IFRC) on the Hanford Site in southeastern Washington State for the U.S. Department of Energy's (DOE) Office of Biological and Environmental Research (BER) within the Office of Science. The project is funded by the Environmental Remediation Sciences Division (ERSD). The purpose of the project is to conduct research at the 300 IFRC to investigate multi-scale mass transfer processes associated with a subsurface uranium plume impacting both the vadose zone and groundwater. The management approach for the 300 Area IFRC requires that a Field Site Management Plan be developed. This is an update of the plan to reflect the installation of the well network and other changes.

No abstract available

[en] The friction and wear behavior of escalator step auxiliary wheels were investigated through friction-wear test. The rotational speed is 60 r/min. The loads applied to the auxiliary wheels are 1000N and 1800N, respectively. The test time is in the range of 0-250 h. The wear mass loss is recorded at different points in time. The main wear mechanism of auxiliary wheel is analyzed. (paper)

[en] In order to provide experimental data to develop fire spread models, numerous tests were performed for a wide range of fire sizes and fuels. Here we focus on large scale kerosene tests (approx. 0.5 to 6 m²), with an emphasis on radiative flame properties and present a novel multispectral approach composed of an opacimetry setup and a FTIR spectrometer. This allowed to compute emittance values (based on transmittance measurements) and equivalent soot temperatures (by fitting the calculated intensities to the measured ones). These results, as well as mass loss rates and flame heights, show good repeatability and agree well with the literature, including with correlations predicting the burning rate, flame height and spectral dependence of the extinction coefficient. Generally it is shown that radiation emitted by the flame is not gray, and can only be considered black for very large flames (i.e. wider than 2.5 m for these tests). Additional data (smaller fires, other fuels, complementary parameters - e.g. flame shape) are still to be analyzed and used to model flame heat radiation. (paper)