We report on resolved interferometric observations with VLTI/MIDI of the massive young stellar object (MYSO) W33A. The MIDI observations deliver spectrally dispersed visibilities with values between 0.03 and 0.06, for a baseline of 45m over the wavelength range 8-13μm. The visibilities indicate that W33A has a FWHM size of approximately 120AU (0.030”) at 8μm which increases to 240AU at 13μm, sc...

Using GRIMM-1107 aerosol sampler, GOES-9 DCD satellite images, HYSPLIT model of backward trajectory and 3D-meteorological WRF-3.6 model, high particulate matter concentrations were investigated at Gangneung city in the Korean east coast which consists Mt. Taeglyung its west East Sea on 00:00LST March 26~00:00 LST 4 April 2004. During a Yellow Dust period, maximum PM10 (PM2.5 PM1) concentration ...

Description: Samples from extra-terrestrial objects that are available for detailed investigation in the laboratory are particularly important to advance our understanding of the formation and evolution of our solar system, where sophisticated instrumentation can be deployed to unlock the secrets they contain. The most primitive and pristine materials are the most useful, but also the rarest sa...

background: composition of dust in the air due to contact with human via inhalation, ingestion and skin absorption will have a large impact on public health. in the learning environments such as universities, many people spend most of their day in contact with the dust. the purpose of this study was to evaluate the concentration of heavy metals lead, chromium and copper in the training space of...

This study demonstrates the use of Class F fly ash in combination with lime or lime kiln dust in the full depth reclamation (FDR) of asphalt pavements. FDR, in the context of this paper, is a process of pulverizing a predetermined amount of flexible pavement that is structurally deficient, blending it with chemical additives and water, and compacting it in place to construct a new stabilized ba...