This paper reports the effect of superficial liquid mass flow rate and bed void fraction on the pressure drop, dynamic liquid hold-up, mean liquid residence time and biofilm wetting, in a co-current down-flow xylene-removing trickle bed air biofilter (TBAB). The gas–liquid pressure drop increased with liquid mass flow rate and it also increased with diminishing bed void fraction, the effect bei...

This study aims to incorporate most recent multiphase models in order to investigate the hydrodynamic behaviour of a TBR in terms of pressure drop, liquid holdup and catalyst wetting efficiency. Taking into account transport phenomena such as mass and heat transfer, an Eulerian k-fluid model was developed resulting from the volume averaging of the continuity and momentum equations and solved fo...

Only 78 foreign-qualified nurses were registered to practise in South Africa last year, mainly because of poor compliance with application requirements and an inability by war-torn/ dysfunctional African governments to verify professional qualifications. These were among the reasons provided by Linda Hlaisi, manager of the South African Nursing Council's (SANC) Foreign Workforce section, for th...

KURZFASSUNG Aufgrund ihres Einsatzgebietes müssen drahtlose Sensornetze (WSNs) häufig drahtlose reprogrammiert werden. Dabei treten diverse Probleme auf, die durch Betriebssysteme und Datendisseminationsprotokolle gelöst werden können. Diese Arbeit stellt zunächst die Handhabung der Reprogrammierung bei den Betriebssystemen TinyOS und Contiki dar. Anschließend werden die Datendisseminationsprot...

History.?He had a severe attack of purulent ophthalmia with considerable tumefaction of both upper lids, a couple of months previous to date, which was treated with instillation of native drugs. A week after the commencement of the treatment, the upper lid of right eye got everted and remained strangulated in that position by muscular spasm; and in three more days, the left eye was similarly af...