21 research outputs found
Pulsating White Dwarf Stars and Precision Asteroseismology
Galactic history is written in the white dwarf stars. Their surface
properties hint at interiors composed of matter under extreme conditions. In
the forty years since their discovery, pulsating white dwarf stars have moved
from side-show curiosities to center stage as important tools for unraveling
the deep mysteries of the Universe. Innovative observational techniques and
theoretical modeling tools have breathed life into precision asteroseismology.
We are just learning to use this powerful tool, confronting theoretical models
with observed frequencies and their time rate-of-change. With this tool, we
calibrate white dwarf cosmochronology; we explore equations of state; we
measure stellar masses, rotation rates, and nuclear reaction rates; we explore
the physics of interior crystallization; we study the structure of the
progenitors of Type Ia supernovae, and we test models of dark matter. The white
dwarf pulsations are at once the heartbeat of galactic history and a window
into unexplored and exotic physics.Comment: 70 pages, 11 figures, to be published in Annual Review of Astronomy
and Astrophysics 200
Symmetric coupling of finite and boundary elements for exterior magnetic field problems
SIGLEAvailable from TIB Hannover: RR 6943(2001,5) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Impact of School Inspections on Teaching and Learning (ISI-TL)
This dataset includes the responses of principals in primary and secondary education to a survey in 2011, 2012 and 2013 about impact of school inspections in 8 countries.
This dataset is created within the EU Life Long Learning-project ‘Impact of School Inspections on Teaching and Learning’. This study compares the effects and unintended consequences of school inspections in six European countries (the Netherlands, the UK, Austria, the Czech Republic, Ireland, Sweden). The project ran for a total of three years (January 2011-December 2013); each year principals in primary education and in secondary education in all the eight participating countries were asked to participate in an online survey. The survey includes questions on educational quality and change capacity in schools, changes made in the quality and change capacity of the school, inspection activities in the school, the school’s acceptance and use of feedback, the extent to which inspection standards set expectations and promote self-evaluations and choice/voice/exit of stakeholders in response to inspection reports
Impact of School Inspections on Teaching and Learning (ISI-TL)
This dataset includes the responses of principals in primary and secondary education to a survey in 2011, 2012 and 2013 about impact of school inspections in 8 countries.
This dataset is created within the EU Life Long Learning-project ‘Impact of School Inspections on Teaching and Learning’. This study compares the effects and unintended consequences of school inspections in six European countries (the Netherlands, the UK, Austria, the Czech Republic, Ireland, Sweden). The project ran for a total of three years (January 2011-December 2013); each year principals in primary education and in secondary education in all the eight participating countries were asked to participate in an online survey. The survey includes questions on educational quality and change capacity in schools, changes made in the quality and change capacity of the school, inspection activities in the school, the school’s acceptance and use of feedback, the extent to which inspection standards set expectations and promote self-evaluations and choice/voice/exit of stakeholders in response to inspection reports