M. D. Canon

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The Seventh Symposium on Operating Systems Principles, held in December 1979, continues an excellent tradition. Part of that tradition includes the publication of some of the best papers in a subsequent issue of the Communications of the ACM. The papers from the Seventh SOSP are included here, and give a good indication of the quality of the program from(More)
OBJECTIVE To determine the prevalence of trial registration in randomized controlled trials (RCTs) published in 2010 (PUBMED/LILACS) from Latin America and the Caribbean's (LAC) and to compare methodological characteristics between registered and nonregistered RCTs. STUDY DESIGN AND SETTING A search for detecting RCTs in which at least the first/contact(More)
INTRODUCTION Few studies have assessed the nature and quality of randomized controlled trials (RCTs) in Latin America and the Caribbean (LAC). METHODS AND FINDINGS The aims of this systematic review are to evaluate the characteristics (including the risk of bias assessment) of RCT conducted in LAC according to funding source. A review of RCTs published in(More)
BACKGROUND We estimated the prevalence of irritable bowel syndrome (IBS) and its impact on patient-reported health-related quality of life (HR-QOL) in a university-based population aged between 18 and 30 years in Bogotá, Colombia. METHODS The study had a cross-sectional design. Students, faculty, and staff aged 18-30 years of the Pontificia Universidad(More)
Virtual machines have long been used for functional testing of operating systems and to obtain the services of multiple operating systems from a single machine. They have not been used for performance evaluation however, because the timing observed by a program executing in a virtual machine is unpredictable and dependent on such factors as system load,(More)
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