A platform might have the potential to bring enormous value its users. However, without a well-orchestrated launch strategy that coordinates sufficient number of users onto platform, this will not be realized. The theoretical literature predicts one approach coordinating take-off is influence market’s subjective focal expectations future installed base This paper reports on field experiment inv...

BACKGROUND The clinical relevance of exercise-induced pulmonary arterial hypertension (PAH) is uncertain, and its existence has never been well studied by direct measurements of central hemodynamics. Using invasive cardiopulmonary exercise testing, we hypothesized that exercise-induced PAH represents a symptomatic stage of PAH, physiologically intermediate between resting pulmonary arterial hyp...

Triple jumpers employ either an asymmetrical 'single-arm' action or symmetrical 'double-arm' action in the takeoff of each phase of the jump. This study investigated which technique is more beneficial in each phase using computer simulation. Kinematic data were obtained from an entire triple jump using a Vicon automatic motion capture system. A planar 13-segment torque-driven subject-specific c...

During the last years, the development of electric propulsion systems is pushed strongly, most notably for automotive applications. For ground based transportation, the system mass is relevant, but of relatively low importance. This paper addresses the application of electric propulsion systems in aeronautics, where all systems are much more constrained by their mass. After comparing different ...

Abstract This article examines, based on the available information and authors’ self-assessments, environmental impact of turbine engine exhaust gases effect environment in airport space during engines flight phases landing takeoff cycle (LTO). The attention aviation professionals is drawn to fact that amount from so significant it may adversely change ambient air at airport. Consequently, incr...

1. INTRODUCTION X-ray sources on next generation low emittance/high brilliance synchrotrons such as the 7-GeV Advanced Photon Source (APS) (1) have unique properties which directly affect the design of the front end of the beam line. The most striking of these are the large peak photon power densities expected for the insertion device (ID) x-ray sources. Undulators. for example. can have highly...