Results 111 to 120 of about 20,378 (254)

Hover jump from helicopter

open access: yes, 1958
Caption: "Hover Jump at McCall, Idaho. RFK.

core  

An Epigenetic Fate Converter Based on Nuclei‐Targeting Lipid Nanoparticles Drives Neuronal Programming of Stem Cells for Spinal Cord Repair

open access: yesAdvanced Functional Materials, EarlyView.
Schematic illustration of LNP‐MPG nuclei‐targeting delivery of HMW‐FGF2 promoting histone acetylation to regulate the fate of DPSCs and treat spinal cord injury. LNPs components include pHMW‐FGF2 plasmid, DSPC, Dlin‐MC3‐DMA, cholesterol, and PEG2000, and are modified with MPG to form HMW‐FGF2@LNP‐MPG (HLM). HLM nuclei‐targets DPSCs to deliver HMW‐FGF2,
Heng Zhou   +6 more
wiley   +1 more source

Acetoacetates Derived From Vegetable Oils: A Platform for Tailor‐Made Vinylogous Urethane Foams

open access: yesAdvanced Functional Materials, EarlyView.
A renewable vegetable oil is converted into acetoacetate‐functionalized precursors for the preparation of catalyst‐free vinylogous urethane foams. Room‐temperature foaming with n‐pentane generates lightweight cellular materials, while the choice of amine enables control over foam structure and mechanical properties.
Krzysztof Polaczek   +8 more
wiley   +1 more source

Dave Schoonover in dark suit with one hand in pocket, front

open access: yes
Jones & Hover, So. Main St., Jacksonville, - Ill. Hand writing on back of card: Dave Schoonoverhttps://scholarworks.utrgv.edu/cartedevisite/1078/thumbnail ...
Jones & Hover
core   +1 more source

PENGATURAN KESTABILAN HOVER PADA QUADROTOR MENGGUNAKAN KONTROL BACKSTEPPING PD PI

open access: yesJurnal Penelitian Fisika dan Aplikasinya, 2016
Quadrotor merupakan jenis pesawat Unmanned Aerial Vehicle (UAV) yang digerakkan oleh 4 buah motor yang terletak di ujung badan utama .Hover merupakan fase terbang yang sangat penting dan harus dimiliki quadrotor agar pemanfaatannya dapat maksimal, dimana
Jumiyatun Jumiyatun   +2 more
doaj  

A Supervised Reinforcement Learning Algorithm for Controlling Drone Hovering

open access: yesDrones
The application of drones carrying different devices for aerial hovering operations is becoming increasingly widespread, but currently there is very little research relying on reinforcement learning methods for hovering control, and it has not been ...
Jiying Wu   +7 more
doaj   +1 more source

Photo‐Degradable Polyester Networks and Multi‐Photon Printed Objects Based on Cyclic Ketene Acetals

open access: yesAdvanced Functional Materials, EarlyView.
The current work introduces a photoreversible polyester network derived from radical ring‐opening polymerization of cyclic ketene acetals. It combines photoreversible cross‐linking with initiator‐free multi‐photon printing. Reversible network formation, tunable mechanical properties, and selective degradation highlight its potential as a versatile ...
Till Meissner   +5 more
wiley   +1 more source

Dynamic Stability and Control Authority Blending in Lift-Plus-Cruise eVTOL Transition Flight

open access: yesDynamics
Lift-plus-cruise electric vertical takeoff and landing (eVTOL) aircraft exhibit complex stability characteristics during transition flight, when rotor-borne and wing-borne regimes coexist.
João Pedro Spadão   +3 more
doaj   +1 more source

Architecture‐Driven Functional Coupling in Vertically Aligned Nanocomposites

open access: yesAdvanced Functional Materials, EarlyView.
Vertically aligned nanocomposites define a growth‐engineered architecture in which vertical interfaces, strain fields, defect pathways, and phase connectivity are created simultaneously. This review shows how these architectural features couple ferroic, optical, ionic, electrochemical, and device responses, establishing design rules and open challenges
Md Shatil Islam‐Shanto   +4 more
wiley   +1 more source

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