Publications by authors named "M J Bilka"
Article Synopsis
- This study analyzes the impact of regulatory changes on competition and entry decisions in the Portuguese retail pharmacy market after 2004 and 2007.
- The liberalization of OTC drug sales and pharmacy ownership lowered entry thresholds, allowing for greater profit potential, but increased competition among existing pharmacies.
- Findings suggest that while it has become easier for new pharmacies to enter the market, the existing competition is tougher, and current patient-to-pharmacy ratio regulations are likely too restrictive, limiting potential market entry.
Microphones are widely applied to measure pressure fluctuations at the walls of solid bodies immersed in turbulent flows. Turbulent motions with various characteristic length scales can result in pressure fluctuations over a wide frequency range. This property of turbulence requires sensing devices to have sufficient sensitivity over a wide range of frequencies.
View Article and Find Full Text PDFThe wake flow field and radiated sound from a low speed axial fan is studied experimentally. The fan geometry uses controlled diffusion blades and is designed with a low aspect ratio (0.9).
View Article and Find Full Text PDFDesign and evaluation of an aeroacoustic wind tunnel for measurement of axial flow fans.
J Acoust Soc Am
December 2011
An anechoic wind tunnel dedicated to fan self-noise studies has been designed and constructed at the von Karman Institute The multi-chamber, mass flow driven design allows for all fan performance characteristics, aerodynamic quantities (e.g., wake turbulence measurements), and acoustic properties to be assessed in the same facility with the same conditions.
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