It has been suggested that resonance absorption of low frequency magnetohydrodynamic waves could be responsible for heating the solar corona (lonson, 1982; Hollweg, 1984). In this paper an improved method for calculating the resonance absorption heating rate is discussed and the results are compared with observations in the solar corona. To accomplish this, the wave equation for a mildly dissip...

CONTENTS. PAGE Introduction 95 The nature of the experiment 96 The structure of the antenna, and general features of the regeneration 97 Measuring and recording the amount of regeneration . . . 99 Variation in amount of regeneration and its causes The lines used for the experiment . Method of carrying out the tests Results of the Lamarckian experiment The Lamarckian factor combined with selecti...

Biological wastewater treatment plants (BWWTPs) based on the activated sludge (AS) process have dramatically improved worldwide water sanitation despite increased urbanization and industrialization. However, current AS-based operations are considered economically and environmentally unsustainable. In this Perspective, we discuss our current understanding of microbial populations and their metab...