Results 41 to 50 of about 260 (72)

A new crested pterosaur from the Early Cretaceous of Spain: the first European tapejarid (Pterodactyloidea: Azhdarchoidea). [PDF]

open access: yesPLoS One, 2012
Vullo R   +6 more
europepmc   +1 more source

Blade Sweep for Low-Speed Axial Fans [PDF]

open access: yes, 1989
Introduction Fan noise in low-speed equipment has been identified as a primary source of overall noise in many heat-exchange applications. When used with engine or motor-driven equipment that has been designed for good noise control, attention must be ...
W E Simmons
core  

Algorithms in 4-manifold topology [PDF]

open access: yes
We show that there exists an algorithm that takes as input two closed, simply connected, topological 4-manifolds and decides whether or not these 4-manifolds are homeomorphic.
Bastl, S.   +30 more
core  

Análisis comparativo de las propiedades físico-mecánicas del mortero añadiendo fibra de musa paradisiaca de plátano y cabuya [PDF]

open access: yes
La presente tesis el objetivo fue analizar comparativamente las propiedades físico-mecánicas del mortero añadiendo fibra de musa paradisiaca de plátano y cabuya, el tipo de investigación fue aplicada, el diseño cuasiexperimental, el nivel de ...
Contreras Mendoza, Ariana Abigail   +1 more
core  

An unsteady lifting surface method for single rotation propellers [PDF]

open access: yes
The mathematical formulation of a lifting surface method for evaluating the steady and unsteady loads induced on single rotation propellers by blade vibration and inflow distortion is described.
Williams, Marc H.
core   +1 more source

Aeronautical engineering, a continuing bibliography with indexes [PDF]

open access: yes
This bibliography lists 823 reports, articles, and other documents introduced into the NASA scientific and technical information system in November ...

core   +1 more source

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