1,118 research outputs found
On Be Star Candidates and Possible Blue Pre-Main Sequence Objects in the Small Magellanic Cloud
Recently the OGLE experiment has provided accurate light curves and colours
for about 2 millions stars in the Small Magellanic Cloud. We have examined this
database for its content of Be stars, applying some selection criteria, and we
have found a sample of 1000 candidates. Some of these stars show
beautiful light curves with amazing variations never observed in any Galactic
variable. We find outbursts in 13% of the sample (Type-1 stars), high and low
states in 15%, periodic variations in 7%, and the usual variations seen in
Galactic Be stars in 65% of the cases. The Galactic counterparts of Type-1
objects could be the outbursting Be stars found by Hubert & Floquet (1998)
after the analysis of Hipparcos photometry. We discuss the possibility that
Type-1 stars could correspond to Be stars with accreting white dwarf companions
or alternatively, blue pre-main sequence stars surrounded by thermally unstable
accretion disks. We provide coordinates and basic photometric information for
these stars and some examples of light curves.Comment: 9 pages, 8 figures, accepted for publication in Astronomy and
Astrophysic
Zróżnicowanie podstawowych zmiennych makroekonomicznych w województwach
The aim of the present study is descriptive analysis of the spatial variation of basic
macroeconomic variables in the provinces. Variables whose variation is considered here are: GDP
per capita gross value of fixed assets per capita, investment per capita, wages and the
unemployment rate. Work carried out in the discussion, because of the availability of relevant
statistics for the CSO ww.stat.gov.pl in August 2012, concern the years 2002–2009 (GDP per
capita and gross fixed assets per capita), 2002–2010 (investment per capita), or 2002–2011 (wages
and unemployment rate). Summarizes the development of taxonomic analysis of complex
economic indicators of macroeconomic variables previously considered
Influence of Liquid Paraffin, White Soft Paraffin and Initial Hydration on Viscosity of Corticosteroid Cream
Purpose: To ascertain the influence of paraffin, white soft paraffin and pre-hydrated white soft paraffin on the viscosity of a cream formulated with a corticosteroid.Methods: The formulations were prepared via homogenization with variable velocity in the range 3300 - 4000 rpm. Individual series of preparations contained the same proportion of macrogol cetostearyl alcohol, cetyl alcohol, stearyl alcohol, sorbitan stearate, propylene glycol, metyl parahydroxybenzoate, propyl parahydroxybenzoate and water. The semi-solid preparations were assessed by viscometric and microscopic methods.Results: The viscosity of the samples measured ranged from 13050 to 15660 mPas. The particles in dispersed phase sized from 15 to 90 ìm. Within the multiple emulsion, the continuous phase included fine particles with diameter < 5 ìm. Change of the liquid paraffin used from Ondina 934 to Vara 600P significantly decreased the viscosity of the formulation. Several phases within the formulations were distinguished microscopically. Increased viscosity was observed in formulations with increasing proportion of white soft paraffin.Conclusion: Both the ratio of liquid paraffin to white soft paraffin, as well as the initial hydration of white soft paraffin influenced the viscosity of the cream as well as the diameter of particles in the dispersed phase.Keywords: Cream, Ointment, Paraffin, Emulsion, Dispersion, Viscosity, Particle diamete
Conformal lattice of magnetic bubble domains in garnet film
We report experimental observations of magnetic bubble domain arrays with no
apparent translational symmetry. Additionally the results of comparative
numerical studies are discussed. Our goal is to present experimental evidence
for natural occurence of conformal structures.Comment: 7 pages, 2 figures, LaTeX2e, accepted as paper E090 at JEMS'01 (Joint
European Magnetic Symposia, formerly EMMA + MRM), August 28th to September
1st, 2001, Grenoble, Franc
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