منابع مشابه
Blurred Star Image Processing for Star Sensors under Dynamic Conditions
The precision of star point location is significant to identify the star map and to acquire the aircraft attitude for star sensors. Under dynamic conditions, star images are not only corrupted by various noises, but also blurred due to the angular rate of the star sensor. According to different angular rates under dynamic conditions, a novel method is proposed in this article, which includes a ...
متن کاملThe Physical Conditions for Massive Star Formation: Dust Continuum Maps and Modeling
Fifty-one dense cores associated with water masers were mapped at 350 μm. These cores are very luminous, 10 < Lbol/L⊙ < 10 , indicative of the formation of massive stars. Dust continuum contour maps, radial intensity profiles, and photometry are presented for these sources. The submillimeter dust emission peak is, on average, nearly coincident with the water maser position. The spectral energy ...
متن کاملStar Formation Rate from Dust Infrared Emission
We examine what types of galaxies the conversion formula from dust infrared (IR) luminosity into the star formation rate (SFR) derived by Kennicutt (1998) is applicable to. The ratio of the observed IR luminosity, LIR, to the intrinsic bolometric luminosity of the newly (. 10 Myr) formed stars, LSF, of a galaxy can be determined by a mean dust opacity in the interstellar medium and the activity...
متن کاملMassive-star supernovae as major dust factories.
We present late-time optical and mid-infrared observations of the Type II supernova 2003gd in the galaxy NGC 628. Mid-infrared excesses consistent with cooling dust in the ejecta are observed 499 to 678 days after outburst and are accompanied by increasing optical extinction and growing asymmetries in the emission-line profiles. Radiative-transfer models show that up to 0.02 solar masses of dus...
متن کاملFrequency of respiratory function disorders among dental laboratory technicians working under conditions of high dust concentration.
BACKGROUND AND OBJECTIVES Dental laboratory technicians (DLTs) have much exposure to mineralogical dust that may have adverse effects on their lung health. The aim of our study was to investigate occupational dust exposure, and to determine the frequency of respiratory function disorders and radiologic abnormalities among DLTs. MATERIALS AND METHODS The study enrolled 94 DLTs who were exposed...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Structural Chemistry
سال: 2011
ISSN: 1040-0400,1572-9001
DOI: 10.1007/s11224-011-9780-5