One possible mechanism for the formation of molecular clouds is large scale colliding flows. In this paper, we examine whether clumpy, colliding, flows could be responsible for the clump mass functions that have been observed in several regions of embedded star formation, which have been shown to be described by a Salpeter type slope. The flows presented here, which comprise a population of ini...

Question: If the size of foraging groups directly influences the probability that individuals starve before reproduction, how does increasing group size affect the consumer population’s dynamic complexity? Key assumptions: We partition a population into foraging groups that must search for food. Food per individual forager varies inversely with population density; social interaction within grou...

The Hipparcos Intermediate Astrometric Data for carbon stars have been reprocessed using an algorithm which provides an objective criterion for rejecting anomalous data points and constrains the parallax to be positive. New parallax solutions have been derived for 317 cool carbon stars, mostly of types R and N. In this paper we discuss the results for the R stars. The most important result is t...

We present relation of the mean I-band brightness of red clump stars on metallicity. Red clump stars were proposed to be a very attractive standard candle for distance determination. The calibration is based on 284 nearby red giant stars whose high quality spectra allowed to determine accurate individual metal abundances. High quality par-allaxes (σπ/π < 10%) and photometry of these very bright...

The availability of multiprocessors and high performance networks ooer the opportunity to construct CLUMPs (Cluster of Multiprocessors) and use them as parallel computing platforms. The main distinctive feature of the CLUMP architecture over the usual parallel computers is its hybrid memory model (message passing between the nodes and shared memory inside the nodes). Some of the primary issues ...

We present a study of radiative transfer in dusty, clumpy star-forming regions. A series of self-consistent, three-dimensional, continuum radiative transfer models are constructed for a grid of models parameterized by central luminosity, filling factor, clump radius, and face-averaged optical depth. The temperature distribution within the clouds is studied as a function of this parameterization...

We present a new deep (down to V D 24) photometry of a wide region (D6@] 6@) around the Large Magellanic Cloud globular cluster NGC 1866. Our sample is much larger (by more than a factor of 3) than any previous photometry and with a main sequence (MS) that may be considered complete, down to at least 3 mag below the brightest MS star ; such an occurrence allows a meaningful and robust compariso...

A variance-based method of analysis is described in which the clump size (average number of solute atoms aggregated together) of one atomic species (solute) in a matrix can be determined from a set of composition measurements taken from volumes which contain a much greater number of solute atoms than the clump size. The observed variance of the solute concentration measurements, each of which i...

Triploid wheat hybrids between tetraploid wheat and Aegilops tauschii sometimes show abnormal growth phenotypes, and the growth abnormalities inhibit generation of wheat synthetic hexaploids. In type II necrosis, one of the growth abnormalities, necrotic cell death accompanied by marked growth repression occurs only under low temperature conditions. At normal temperature, the type II necrosis l...