Our ability to determine stellar ages from measurements of stellar rotation, hinges on how well we can measure the dependence of rotation on age for stars of different masses. Rotation periods for stars in open clusters are essential to determine the relations between stellar age, rotation, and mass (color). Until recently, ambiguities in v sin i data and lack of cluster membership information,...

Few studies have explored the development of response selection processes in children in the case of object manipulation. In the current research, we studied the end-state comfort effect, the tendency to ensure a comfortable position at the end rather than at the beginning of simple object manipulation tasks. We used two versions of the unimanual bar transport task. In Experiment 1, only 10-yea...

A wide range of observational and theoretical arguments suggest that the universe experienced a period of heating and metal enrichment, most likely from starbursting dwarf galaxies. Using a hydrodynamic simulation we have conducted a detailed theoretical investigation of this epoch at the end of the cosmological “dark ages”. Outflows strip baryons from pre-viralized halos with total masses ∼ <1...

Introduction. Professionals who assess early childhood development highly benefit from reliable development screening measures. The Ages & Stages Questionnaire was adapted Brazil in 2010 and named ASQ-BR. Modifications in some items were required to improve the instrument's psychometric properties. The present study modified the ASQ-BR to verify if those changes increase its characteristics. Me...

RICHARD KIECKHEFER, Magic in the Middle Ages, Cambridge Medieval Textbooks, Cambridge University Press, 1989, 8vo, pp. x, 219, illus., £20.00/$39.50, £6.95/$9.95 (paperback). Magic in the Middle Ages is meant to be a general textbook on anything covered by the term "magic"-defined in the most generous sense as a cultural form in Europe between the years c. 500 to 1500. It succeeds admirably. Be...

Application of the variability-size relationship to atmospheric aerosol studies: estimating aerosol lifetimes and ages J. Williams, M. de Reus, R. Krejci, H. Fischer, and J. Ström Max Planck Institute for Chemistry, Mainz, Germany Institute of Applied Environmental Research (ITM), Stockholm University, Sweden Received: 12 October 2001 – Accepted: 14 November 2001 – Published: 18 January 2002 Co...