Editorial: Why Do Ghosts Wear Clothes?

Why do people fitted with hearing aids not wear them?

OBJECTIVE Age-related hearing loss is an increasingly important public health problem affecting approximately 40% of 55-74 year olds. The primary clinical management intervention for people with hearing loss is hearing aids, however, the majority (80%) of adults aged 55-74 years who would benefit from a hearing aid, do not use them. Furthermore, many people given a hearing aid do not wear it. T...

Editorial: Evidence-based practice: Why do I need that ?

Why and How do Municipal areas Govern Interorganizational ICT Cooperation: Indeed, "the Emperor has no Clothes"

Information and communication technologies (ICT) are significant for the development and production of municipalities’ services and activities. Yet, municipalities typically operate their ICT independently with only limited resources. Limited resources are a key incentive for inter-municipal ICT cooperation. We investigated, how inter-municipal ICT cooperation was executed and governed in 20 Fi...

Editorial Material: How do we know when patients sleep properly or why they do not?

Editorial Material: How do we know when patients sleep properly or why they do not

Groups Which Do Not Admit Ghosts

A ghost in the stable module category of a group G is a map between representations of G that is invisible to Tate cohomology. We show that the only non-trivial finite p-groups whose stable module categories have no non-trivial ghosts are the cyclic groups C2 and C3. We compare this to the situation in the derived category of a commutative ring. We also determine for which groups G the second p...