| We consider the eeect of using randomly selected sequence multisets for the uplink of a code-division multiple-access channel. In particular, we calculate a tight lower bound on the expected value of the sum capacity, over the ensemble of randomly selected sequence multi-sets. We show that for large systems, the sum rate penalty for using randomly selected multi-sets is at most 1 nat, and van...

OBJECTIVE To examine associations between ambient air pollutants and respiratory outcomes among schoolchildren in Durban, South Africa. METHODS Primary schools from within each of seven communities in two regions of Durban (the highly industrialised south compared with the non-industrial north) were selected. Children from randomly selected grade 4 classrooms were invited to participate. Stan...

Eight questionnaires, which were developed from Hsu (1989, 1995) quality monitoring tool (A and B questionnaires for four types of patients), were randomly selected to monitor orthopaedic nursing care quality in preand post-test. Eight questionnaires that included 50 criteria in each questionnaire were developed to assure the quality of nursing care. Data collection methods for the quality tool...

When planning a randomized clinical trial, careful consideration must be given to how participants are selected for various arms of a study. Selection and accidental bias may occur when participants are not assigned to study groups with equal probability. A simple random allocation scheme is a process by which each participant has equal likelihood of being assigned to treatment versus referent ...

The problem of hierarchical clustering items from pairwise similarities is found across various scientific disciplines, from biology to networking. Often, applications of clustering techniques are limited by the cost of obtaining similarities between pairs of items. While prior work has been developed to reconstruct clustering using a significantly reduced set of pairwise similarities via adapt...