نتایج جستجو برای: dust charge variation
تعداد نتایج: 475329 فیلتر نتایج به سال:
Context. Past and recent observations have revealed unexpected variations in the far-infrared – millimeter (FIR-mm) dust emissivity in the interstellar medium. In the Herschel spectral range, those are often referred to as a 500 μm emission excess. Several dust emission models have been developed to interpret astrophysical data in the FIR-mm domain. However, these are commonly unable to fully r...
Two methods commonly used to quantify ectoparasites on live birds are visual examination and dust-ruffling. Visual examination provides an estimate of ectoparasite abundance based on an observer's timed inspection of various body regions on a bird. Dust-ruffling involves application of insecticidal powder to feathers that are then ruffled to dislodge ectoparasites onto a collection surface wher...
Global atmospheric dust is simulated using DEAD (Dust Entrainment and Deposition model) in combination with the global scale Oslo CTM2 using meteorological data for 1996. Dust sources are calculated both using mean wind speeds with model resolution (T63) and sub-grid wind speeds. Different datasets are used to describe soil erodibility. We explain how the different assumptions on dust productio...
BACKGROUND Cow hair and dander are important inducers of occupational allergies in cattle-exposed farmers. To estimate allergen exposure in farming environments, a sensitive enzyme immunoassay was developed to measure cow hair allergens. METHODS A sandwich ELISA was developed using polyclonal rabbitantibodies against a mixture of hair extracts from different cattle breeds. To assess the speci...
Aims. To understand the origin of the Lyα line profile of the prototypical Lyman break galaxy (LBG) MS 1512–cB58 and other similar objects. To attempt a consistent fit of Lyα and other UV properties of this galaxy. To understand the main physical parameter(s) responsible for the large variation of Lyα line strengths and profiles observed in LBGs. Methods. Using our 3D Lyα radiation transfer cod...
A theoretical investigation has been made of two new ultra-low-frequency electrostatic modes, namely, dust-cyclotron mode and dust-lower-hybrid mode, propagating perpendicular to the external magnetic field, in a self-gravitating magnetized two fluid dusty plasma system. It has been shown that the effect of the self-gravitational force, acting on both dust grains and ions, significantly modifie...
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