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For some months now, we have been at work on a project called ‘‘Grouping Data.’’ In it, we address several specific questions (e.g., Under what circumstances should we group data? If the appropriate circumstances exist, how ought we proceed?). But our overarching message is a simple one: the decisions we make over how to group data may crucially affect the inferences we reach. This certainly ho...

OBJECTIVE The quality of documentation of signs and symptoms and validation of the diagnosis of irritable bowel syndrome (IBS) according to case definition criteria of Manning, Rome I and Rome II in an office setting has not been previously described. We sought to identify and validate cases of IBS based on the Manning, Rome I and Rome II diagnostic criteria in a rural practice setting. SETTI...

When reservoirs are built, they subject to some degree of sedimentation. This happens because the increase in wetted area reduces flow velocity. As a result, sustaining forces sediments diminished. One mechanism assess reservoir sedimentation is through physical models, which provide data for numerical models. parameters that needs be input into model Manning coefficient. Thus, aim this study w...

En el diseño de sistemas riego multisalidas es necesario calcular las pérdidas energía por fricción en tuberías y determinar diámetro más económico óptimo, para ello existen ecuaciones Manning, Hanzen & Williams Darcy Wesbach. De acuerdo con lo anterior objetivo este trabajo fue realizar un análisis físico matemático a rozamiento accesorios generar al menos una ecuación determinística basad...