The emission of the plerion G21.5–0.9 appears more extended in X rays than in radio. This is an unexpected result because it would imply that short-lived X-ray electrons may reach distances even larger than radio electrons. Applying an empirical relationship between dust scattering optical depth and photoelectric column density, the measured column density leads to a large optical depth at 1 ke...

Coalminers' pneumoconiosis may be complicated by the development of progressive massive fibrosis (PMF) or by rheumatoid pneumoconiosis (Caplan's syndrome).'2 The arthritis in Caplan's syndrome may precede, coincide with, or follow the development of pulmonary radiological shadows. These conditions are common in miners and may be seen in workmen exposed to dusts other than coal.' The Fujian Shao...

We developed the first Monte-Carlo code for threedimensional self-consistent continuum radiative transfer calculations. The density structure of the dust configuration (disk/envelope/molecular cloud core) can be chosen arbitrarily as well as the number, configuration, and radiation parameters of the stars inside this configuration. Binaries and multiple stellar systems (with or without disks ar...

We study the evolution of the galaxy UV luminosity density as a function of redshift in the Hubble Deep Field North (HDF–N). We estimate the amount of energy absorbed by dust and hidden from optical observations by analyzing the HDF–N photometric data with the spectral energy distribution fitting method. According to our results, at redshifts 1 ≤ z ≤ 4.5, the global energy observed in the UV re...

The 11 km fringe visibilities of IRC ]10011 (\ CIT3) and IRC ]10420 have been measured at baselines ranging from 2 to 14 m with a two-telescope interferometer. The visibility data provide onedimensional proÐles of these two stars and their immediate surroundings with higher resolution in this spectral range than is presently possible with a single-aperture telescope. Spherically symmetric radia...

We develop a method of analyzing radio frequency spectral line observations to derive data on the temperature, density, velocity, and molecular abundance of the emitting gas. The method incorporates a radiative transfer code with a new technique for handling overlapping hyperfine emission lines within the accelerated lambda iteration algorithm and a heuristic search algorithm based on simulated...

The observed extragalactic background light (EBL) is affected by light attenuation due to absorption of light by galactic and intergalactic dust in the Universe. Even galactic opacity of 10-20 percent and minute universe intergalactic opacity of 0.01 mag h Gpc ́1 at the local Universe have a significant impact on the EBL because obscuration of galaxies and density of intergalactic dust increase ...

To study the interaction of star-formation and turbulent molecular cloud structuring, we analyse numerical models and observations of self-gravitating clouds using the ∆-variance as statistical measure for structural characteristics. In the models we resolve the transition from purely hydrodynamic turbulence to gravitational collapse associated with the formation and mass growth of protostellar...

We present direct evidence for anomalous microwave emission in the Perseus molecular cloud, which shows a clear rising spectrum from 11 to 17 GHz in the data of the COSMOSOMAS experiment. By extending the frequency coverage using WMAP maps convolved with the COSMOSOMAS scanning pattern we reveal a peak flux density of 42 ± 4 Jy at 22 GHz integrated over an extended area of 1.65◦ × 1.0◦ centered...

BACKGROUND In Hawai'i, mortality and morbidity from asthma are significant. In the 80's, there had been no local studies of topography folklore. There had been only one report of seasonal variation in house dust mite (HDM) density in Hawai'i, and this showed no significant variation in O'ahu's Manoa Valley but a definite variation in Waikiki. There were no studies of complete replacement of fur...