BACKGROUND The Flutter VRP1 device is used for airway clearance. Its performance is based on 4 basic effects: positive expiratory pressure (PEP), forced exhalations (huff), high-frequency airway flow oscillation, and modification of mucus viscoelasticity. The purpose of this study was to determine the flow and angle conditions in which these effects are optimized. METHODS In an experimental s...

The gap between the researcher’s world and the practitioner’s world has long been recognised: research literature is generally not part of a practitioner’s library (Huberman, 1990). One of the effects of this is that actions by decision-makers and practitioners are unlikely to be informed by research, and dissemination of research information and knowledge is problematic (Hillage et al., 1998)....

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Modelling the location decision of two competing firms that intend to build a new facility in a planar market can be done by a Huff-like Stackelberg location problem. In a Huff-like model, the market share captured by a firm is given by a gravity model determined by distance calculations to facilities. In a Stackelberg model, the leader is the firm that locates first and takes into account the ...

INTRODUCTION Communication in information systems (IS) research and practice is a social process that is characterized by ongoing sense making among various parties. In research, researchers must be able to fully understand research participants’ perceptions about a problem domain. In IS development and implementation, IS professionals and various stakeholders need to communicate effectively in...