نتایج جستجو برای: street dust

تعداد نتایج: 71125  

Journal: :معماری و شهرسازی آرمان شهر 0
payam mahmoudi kurdistani m. a. graduate in urban design, faculty of architecture and urbanism, iran university of science and technology, tehran, iran peyman khodabakhsh phd candidate in urban planning, faculty of architecture & urbanism, technical university of berlin, berlin, germany samira mashayekhi m. a. graduate in urban design, faculty of architecture & urbanism, shahid beheshti university, tehran, iran

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...

Journal: :Biomedical Journal of Scientific & Technical Research 2020

Journal: :Applied sciences 2021

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 ...

2008
James Muzerolle Nuria Calvet Paola D’Alessio

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...

1998
Randall K. Smith Eli Dwek

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...

2005
T. M. Gledhill K. Gordon A. G. G. M. Tielens A. A. Zijlstra

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...

2005
T. M. Gledhill K. Gordon A. G. G. M. Tielens A. A. Zijlstra

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...

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