10,178 research outputs found
NASA participation in the AMST program
The objectives of the NASA Advanced Medium STOL Transport Experiments Program are discussed and several of the NASA experiments currently implemented and conducted on the YC-14 and YC-15 prototype aircraft are described. Emphasis is placed on experiments related to powered lift aerodynamics and acoustics
Flight experience with a pivoting traversing boundary-layer probe
A pivoting traversing boundary layer probe was evaluated in flight on an F-104 airplane. The evaluation was performed at free stream Mach numbers from 0.8 to 2.0. The unit is described, and operating problems and their solutions are discussed. Conventional boundary layer profiles containing variations in flow angle within the viscous layer are shown for free stream Mach numbers of 0.8, 1.6, and 2.0. Although the unit was not optimized for size and weight, it successfully measured simultaneously flow angularity, probe height, and pitot pressure through the boundary layer
The Bak-Sneppen Model on Scale-Free Networks
We investigate by numerical simulations and analytical calculations the
Bak-Sneppen model for biological evolution in scale-free networks. By using
large scale numerical simulations, we study the avalanche size distribution and
the activity time behavior at nodes with different connectivities. We argue the
absence of a critical barrier and its associated critical behavior for infinite
size systems. These findings are supported by a single site mean-field analytic
treatment of the model.Comment: 5 pages and 3 eps figures. Final version appeared in Europhys. Let
Arritmias cardíacas en la clínica del perro y del gato : una revisión bibliográfica y su enfoque práctico
En el presente trabajo los autores realizan una revisión del sistema intrínseco de conducción eléctrica intracardïaco, los mecanismos de generación de arritmias y una revisión práctica de las alteraciones electrocardiográficas más habituales en la clínica diaria con especial atención a su diagnóstico, posible etiología y tratamiento.In this article, the authors present a review of the conduction system and arrhythmia generation in the dog and cat, and their findings on clinical work with ECG alterations in the dog and cat, with special atenrior: to their diagnosis, causes and therapeutical approach
Improving Asphalt Pavement Construction by Using a Modified Mixture Design: A Demonstration Project
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