Results 41 to 50 of about 351,773 (348)

Functionalized BODIPYs as Fluorescent Molecular Rotors for Viscosity Detection

open access: yesFrontiers in Chemistry, 2019
Abnormal changes of intracellular microviscosity are associated with a series of pathologies and diseases. Therefore, monitoring viscosity at cellular and subcellular levels is important for pathological research. Fluorescent molecular rotors (FMRs) have
W. Miao   +3 more
semanticscholar   +1 more source

Generator configuration for helicopter quadruplex electric tail rotor

open access: yesThe Journal of Engineering, 2019
With the move to more electric aircraft (MEA), a key area of investigation is the development of commercially viable systems which are reliable, efficient, low mass, and are compatible and commensurate with the power and multiplex requirements of current
Julian D. Booker   +3 more
doaj   +1 more source

Improved methodology for damping sub‐synchronous oscillation in a series‐compensated DFIG‐based wind farm

open access: yesIET Generation, Transmission & Distribution, 2023
The interaction between the wind farm and the series‐compensated transmission line may lead to the sub‐synchronous oscillation (SSO) phenomenon which affects the system stability and equipment safety.
Mohamed Abdeen   +4 more
doaj   +1 more source

A Techno-Economic Analysis of a Cargo Ship Using Flettner Rotors

open access: yesJournal of Marine Science and Engineering, 2023
In the last twenty years, the global shipping transport demand has strongly increased (around 4% per year since the 1990s), together with the request for new green propulsion technologies to break down carbon emissions and face the costs deriving from ...
Gianluca Angelini   +2 more
doaj   +1 more source

Rotational Friction and Diffusion of Quantum Rotors. [PDF]

open access: yesPhysical Review Letters, 2017
We present the Markovian quantum master equation describing rotational decoherence, friction, diffusion, and thermalization of planar, linear, and asymmetric rotors in contact with a thermal environment.
B. Stickler, B. Schrinski, K. Hornberger
semanticscholar   +1 more source

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

open access: yesAdvanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Power oscillation coordination damping control strategy of DFIG for fault ride through after clearing the fault

open access: yesThe Journal of Engineering, 2019
Wind turbines should have fault ride through capability, and also it can provide damping for the power grid by improving the control strategy. However, the currently corresponding control strategy is designed independent for the fault voltage through ...
Haiyan Tang   +3 more
doaj   +1 more source

Ultrathin two-dimensional porous organic nanosheets with molecular rotors for chemical sensing

open access: yesNature Communications, 2017
Molecular rotors have played an important role in recent materials chemistry. Although several studies on functional materials containing molecular rotors have been reported for fluorescence sensing, this concept has yet to be realized in two-dimensional
Jinqiao Dong   +8 more
semanticscholar   +1 more source

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

open access: yesAdvanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund   +6 more
wiley   +1 more source

Design route towards a PM machine for rotorcraft environments

open access: yesThe Journal of Engineering, 2019
This paper discusses the design route followed in the development of a permanent magnet (PM) machine for electrical power generation on board a rotorcraft (helicopter).
Dominic North   +4 more
doaj   +1 more source

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