Results 151 to 160 of about 35,990 (188)

EPOS-OHCA: Early Predictors of Outcome and Survival after non-traumatic Out-of-Hospital Cardiac Arrest. [PDF]

Resusc Plus
Kreutz J, Patsalis N, Müller C, Chatzis G, Syntila S, Sassani K, Betz S, Schieffer B, Markus B.   +8 more
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Stakeholder Perspectives on Telehealth Effectiveness, Facilitators, and Barriers for Wheelchair Service Provision: A Needs Analysis. [PDF]

Int J Telerehabil
Taylor R, Schein R, Morrow C.
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Direct mechanical communication of cellular to nuclear shape in oocytes

Vos BE, Vadapalli Y, Muenker T, Jentoft IMA, Todisco E, Eskandari MA, Schuh M, Lenart P, Betz T.   +8 more
europepmc   +1 more source

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Reexamination of Betz’s Limit for Wind Engines

Journal of Contemporary Physics (Armenian Academy of Sciences), 2021
Wind energy is one of the main factors in the future transition to renewable energies. Hence, it is important to understand how much work can be extracted from the kinetic energy of the wind. Understanding these constraints is important for setting correct strategic goals in wind power research and industry.
A. E. Allahverdyan, E. A. Khalafyan
openaire   +1 more source

Optimal Distribution of the Disk Load: Validity of the Betz–Joukowsky Limit

AIAA Journal, 2022
The popular axial momentum theory relies on the steady, incompressible, axisymmetric, and inviscid flow through a so-called actuator disk. The most important result of this theory is the famous Betz–Joukowsky limit, stating that the maximum power coefficient achievable by an open disk is limited to 16/27.
Bontempo, Rodolfo, Manna, Marcello
openaire   +2 more sources

The Betz limit applied to Airborne Wind Energy

Renewable Energy, 2018
Abstract In this paper we revisit the modeling framework used to derive the Betz limit of power extraction from the wind based on linear momentum theory. One of our contributions is to suggest that the Betz limit of 16 / 27 ≈ 59 % should in fact hold true for any device that harvests power through drag or torque in a horizontal-axis ...
Marcelo De Lellis, Romeu Reginatto, Ramiro Saraiva, Alexandre Trofino   +3 more
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Analysis of unsteady flow effects on the Betz limit for flapping foil power generation

Journal of Fluid Mechanics, 2020
Abstract
John Young, Fang-Bao Tian, Zhengliang Liu, Joseph C. S. Lai, Nima Nadim, Anthony D. Lucey   +5 more
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Betz Limit Not an Exact Optimum

Wind Engineering, 2013
The Betz high speed ratio limit has not been derived in the complete generality that would prove it absolute for an unshrouded actuator. The assumed uniform wake or thrust loading is hard to prove optimal. Many authors also assume uniform flow at the rotor or equivalently the differential form of the momentum equation but neither is necessary in the ...
openaire   +1 more source