T he estrus cycle of rats and hamsters is regulated by the daily light-dar k cycle . The suprachiasmatic nucleus of the hypothalamus appears t o generate a rhythm with a frequency of approximately one cycle in 24 hours . This rhythm is exactly synchronized with the external light-dark cycle b y impulses received from the eyes through a retinohypothalamic projection . Lesions that destroy the su...

Zusammenfassung Der Test von nichtfunktionalen Anforderungen stellt einen wichtigen Bestandteil der Qualitätssicherung dar. In diesem Beitrag wird basierend auf einem praktischen Beispiel von Wincor Nixdorf erläutert, wie die Anforderungen hinsichtlich Zuverlässigkeit, Effizienz und Skalierbarkeit überprüft werden können. Der Beitrag fokussiert dabei auf die Testarten Dauertest, Performancemess...

A gentic instability in Phycomyces is described that appears to be associated with a single nuclear gene, dar. The wild type is able to take up riboflavin and its toxic analogue, deaza-riboflavin, from nanomolar concentrations in the medium. The mutants are unable to take up riboflavin and are resistant to deaza-riboflavin. Forward and reverse mutation rates are estimated to be 4 x 10(-5) and 2...

this study is about philosophical view of soltan ali khorasani gonabadi, the writer of dastur al-alag manuscript, dating back to 1524 ad, on physicians. the original manuscript, kept at shiraz university of medical sciences museum, was studied thoroughly. in the preface of the book, soltan ali khorasani gonabadi explained his holistic view on medicine and considered ethical and philosophical ba...

1 Department of Civil and Environmental Engineering, Imperial College London, London, UK 2 Grantham Institute for Climate Change and the Environment, Imperial College London, London, UK 3 Departamento de Ingeniería Civil y Ambiental, Escuela Politécnica Nacional, Quito, Ecuador 4 Department of Civil Engineering, Universiti Putra Malaysia, Serdang, Malaysia 5 Consortium for the Sustainable Devel...

Dynamic asset rating (DAR) is one of the number of techniques that could be used to facilitate low carbon electricity network operation. Previous work has looked at this technique from an asset perspective. This paper focuses, instead, from a network perspective by proposing a dynamic network rating (DNR) approach. The models available for use with DAR are discussed and compared using measured ...