Broad Lines in Science Teaching

Teaching Political Science in Europe

Thisarticle first reviews the history of political science teaching in Europebefore going on to consider a range of recent developments in the teaching of politicalscience, including cross-national joint programmers; technologically enhancedlearning; placement learning and problem-based learning. The last sectionconsiders a range of issues facing political science teachers, includingfinancial p...

Competencies in Science Teaching

• The role of competencies is discussed with respect to science teaching. In particular, competence models from Germany, Switzerland and Austria are presented and compared. A special topical program, ‘Competencies in Mathematics and Science Teaching’, was started in Austria three years ago. Initial experiences with this program are reported, specifically with regard to how the teachers adopt th...

Broad Iron Lines in Active Galactic Nuclei

An intrinsically narrow line emitted by an accretion disk around a black hole appears broadened and skewed as a result of the Doppler effect and gravitational redshift. The fluorescent iron line in the X-ray band at 6.4 – 6.9 keV is the strongest such line and is seen in the X-ray spectrum of many active galactic nuclei and, in particular, Seyfert galaxies. It is an important diagnostic with wh...

XMM-Newton and Broad Iron Lines

Iron line emission is common in the X-ray spectra of accreting black holes. When the line emission is broad or variable then it is likely to originate from close to the black hole. X-ray irradiation of the accretion flow by the power-law X-ray continuum produces the X-ray ’reflection’ spectrum which includes the iron line. The shape and variability of the iron lines and reflection can be used a...

The Teaching of Science.