نتایج جستجو برای: street dust
تعداد نتایج: 71125 فیلتر نتایج به سال:
the concepts of democracy have been around for centuries in different fields of human sciences. however, in most of these fields the idealistic and far-fetched features attributed to democracy have not been manipulated yet. it should be mentioned that there have been only a few serious attempts to find proper go-between elements, which could make such a concept as comprehensible and tangible as...
Various pollutants, including heavy metals, present in street dust can pose a threat to the health of city dwellers. So far, studies on levels this have been carried out mainly large cities, characterised by considerable road traffic and industrial activity. This paper assesses hazard index cancer risk for Cd, Cr, Cu, Ni, Pb Zn contained collected 2013 2018 at 62 points located different parts ...
We present near-infrared spectra of the excess continuum emission from the innermost regions of classical T Tauri disks. In almost all cases, the shape of the excess is consistent with that of a single-temperature blackbody with T ∼ 1400 K, similar to the expected dust sublimation temperature for typical dust compositions. The amount of excess flux roughly correlates with the accretion luminosi...
Small angle scatterings of X-rays by interstellar dust particles create halos around x-ray sources. The halo intensity and its projected radial distribution around a source can provide important information on the spatial distribution of the dust along the line of sight to the source, and on the physical properties of the scattering dust particles. Halos around x-ray point sources have been use...
Dust emission from the Type II supernova SN 2002hh in NGC 6946 has been detected at mid-infrared wavelengths by the Spitzer Space Telescope from 590 to 758 days after outburst and confirmed by higher angular resolution Gemini-N mid-IR observations. The day-600 5.8 − 24-μm emission can be fit by a 290-K blackbody having a luminosity of 1.6×10 L⊙. The minimum emitting radius of 1.1×10 cm is too l...
Dust emission from the Type II supernova SN 2002hh in NGC 6946 has been detected at mid-infrared wavelengths by the Spitzer Space Telescope from 590 to 758 days after outburst and confirmed by higher angular resolution Gemini-N mid-IR observations. The day-600 5.8 − 24-μm emission can be fit by a 290-K blackbody having a luminosity of 1.6×10 L⊙. The minimum emitting radius of 1.1×10 cm is too l...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید