Results 81 to 90 of about 189,925 (269)
Geometrically Nonlinear Analysis of Composite Beams Based Using a Space–Time Finite Element Method
AerospaceIn this paper, we present a transient-format time-continuous Galerkin finite element method for fully intrinsic geometrically exact beam equations that are energy-consistent.
Xin Hu, Lidao Chen, Yong Liu
doaj +1 more source
Helicopter noise regulations: An industry perspective [PDF]
A review of helicopter noise measurement programs and noise reduction/economic studies of FAA is given along with a critique of a study which addresses the economic impact of noise reduction on helicopter noise.
Wagner, R. A.
core +1 more source
Strategic Management Journal, EarlyView.Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani +2 more
wiley +1 more source
MachinesAdvances in distributed electric propulsion and urban air mobility technologies have spurred a surge of research on electric Vertical Take-Off and Landing (eVTOL) aircraft.
Jiahao Zhu +4 more
doaj +1 more source
Comparison of predicted engine core noise with proposed FAA helicopter noise certification requirements [PDF]
Calculated engine core noise levels, based on NASA-Lewis prediction procedures, for five representative helicopter engines are compared with measured total helicopter noise levels and proposed FAA helicopter noise certification requirements.
Groesbeck, D. E., Vonglahn, U.
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Simulation of tail boom vibrations using main rotor-fuselage Computational Fluid Dynamics (CFD) [PDF]
, 2017 In this work, fully-resolved rotor-fuselage interactional aerodynamics is used as the forcing term in a model based on the Euler-Bernoulli equation, aiming to simulate helicopter tail-boom vibration.
Barakos, George N. +4 more
core +2 more sources
Rethinking Face‐to‐Face Interaction: Lessons from Studies of “Autistic Sociality”
Symbolic Interaction, EarlyView.Face‐to‐face interaction is a foundational concept in microsociology. This article surveys the social experiences of autistic people, who are commonly known for having a strained relationship with interactions face to face. By interpretively reviewing and synthesizing the broader literature on “autistic sociality,” the article provides a nuanced ...
Lars E. F. Johannessen
wiley +1 more source
DronesThe unmanned quad tilt-rotor eVTOL (QTRV) is a variable-configuration aircraft that combines the features of vertical takeoff and landing (VTOL), hovering, and high-speed cruising, making its control system design particularly challenging.
Bohai Deng +3 more
doaj +1 more source
, 2020 The aim of this study is to validate the Italian version of the Helicopter Parenting Instrument (HPI), a self-report instrument that evaluate adolescents’ and young adults’ perception of parenting behaviors. The term helicopter parenting describes a style of child-rearing characterized by parents who are over-involved in every aspect of their children ...
Pistella, J +4 more
openaire +4 more sources
Application of a helicopter mathematical model to the Langley differential maneuvering simulator for use in a helicopter/fighter evasive maneuver study [PDF]
A real time simulation study was conducted using a differential maneuvering simulator to determine and evaluate helicopter evasive maneuvers when attacked by fighter aircraft.
Ashworth, B. R. +2 more
core +1 more source