Results 61 to 70 of about 64,260 (282)

Tendon‐Driven Compliant Wheel‐Less Snake Robot for Undulatory Locomotion Using Conformable Ground Contacts

Advanced Intelligent Systems, EarlyView.
This study presents a tendon‐driven compliant snake robot that uses globally applied vertical bending and axial twisting along its body to enable various gaits. Body deflection from compliance and weight passively generates the ground contact patterns required for locomotion.
Serdar Incekara, Seongil Kwon, Gangil Kwon, Junhyoung Ha   +3 more
wiley   +1 more source

Hydrogel Embedding of Mesenchymal Stem Cells Supports Extracellular Vesicle Production

Biotechnology and Bioengineering, EarlyView.
This study investigates the effects of 3D culture conditions on extracellular vesicle (EV) production by mesenchymal stem cells (MSCs) in a gelatin‐based hydrogel matrix (GelMA). The EVs from both conditions were found to have similar morphological, molecular, and functional properties, but 3D cultures produced more total EVs per volume.
Rachel K. Moen, Gabriella Faircloth, Nicole T. Marguerite, Mariachiara Conti, Ethan S. Lippmann, Jamey D. Young   +5 more
wiley   +1 more source

Experimental study of main rotor tip geometry and tail rotor interactions in hover. Volume 1. Text and figures [PDF]

A model scale hover test was conducted in the Sikorsky Aircraft Model rotor hover Facility to identify and quantify the impact of the tail rotor on the demonstrated advantages of advanced geometry tip configurations.
Balch, D. T., Lombardi, J.
core   +1 more source

Sub-ballistic behavior in quantum systems with L\'evy noise

, 2007
We investigate the quantum walk and the quantum kicked rotor in resonance subjected to noise with a L\'evy waiting time distribution. We find that both systems have a sub-ballistic wave function spreading as shown by a power-law tail of the standard ...
A. Romanelli, H. J. Jensen, M. Nielssen, P. Lévy, R. Siri, V. Micenmacher   +5 more
core   +1 more source

Controlling Aggregation‐Induced Emission by Sterics in Nitrogen–Boron–Nitrogen (NBN)‐Doped Tetraphenylethylene‐Like Molecular Propellers

Chemistry – A European Journal, EarlyView.
Nitrogen–boron–nitrogen (NBN)‐substituted molecular propellers are presented as structural framework for aggregation induced emission (AIE) applications. Steric hindrance is revealed to steer maximum‐AIE behavior, leading to refined control over assembly‐induced luminescence.
Nico Groß, Bojan Tanović, Frank Hampel, Henry Dube, Ani Ozcelik   +4 more
wiley   +1 more source

COMPUTATIONAL STUDY OF AERODYNAMIC CHARACTERISTICS OF SINGLE-ROTOR HELICOPTER TAIL ROTOR UNDER THE INFLUENCE OF VORTICAL WAKE OF MAIN ROTOR AT THE HOVER WITH CROSSWIND

Научный вестник МГТУ ГА, 2017
For single-rotor helicopters there are special flight modes, when tail rotor (TR) is under significant inductive influence of vortical wake of main rotor (MR).
Yu. M. Ignatkin, P. V. Makeev, A. I. Shomov, V. A. Ivchin   +3 more
doaj  

Research investigation of helicopter main rotor/tail rotor interaction noise [PDF]

Acoustic measurements were obtained in a Langley 14 x 22 foot Subsonic Wind Tunnel to study the aeroacoustic interaction of 1/5th scale main rotor, tail rotor, and fuselage models.
Fitzgerald, J., Kohlhepp, F.
core   +1 more source

Structural Aspects of Lithium‐Ion Conduction in the Phosphidotitanate Li8TiP4 and Its Comparison With Li7+5xTa1−xP4 and Li8−xTi1−xTaxP4

Chemistry – A European Journal, EarlyView.
ABSTRACT The chemical system Li/Ti/P has previously been subject to intensive investigation. However, reliable structural data for the reported phases have remained elusive. Motivated by the growing interest in phosphorus‐based lithium‐ion conductors, we have reinvestigated the synthesis, crystal structure, and physical properties of Li8TiP4.
David Müller, Tobias Kutsch, Sabine Zeitz, Viktor Hlukhyy, Gabriele Raudaschl‐Sieber, Wilhelm Klein, Thomas F. Fässler   +6 more
wiley   +1 more source

Purification, Fluorescent Labeling, and Detyrosination of Mammalian Cell Tubulin for Biochemical Assays

Cytoskeleton, EarlyView.
ABSTRACT Microtubules play essential roles in numerous cellular processes. All microtubules are built from the protein tubulin, yet individual microtubules can differ spatially and temporally due to their tubulin isotype composition and post‐translational modifications (PTMs).
Ezekiel C. Thomas, Yang Yue, Morgan L. Pimm, Takashi Hotta, Ryoma Ohi, Kristen J. Verhey   +5 more
wiley   +1 more source

HELICOPTER ROTOR DESIGN

Journal of Industrial Design and Engineering Graphics, 2011
The objective of this paper is to analyze the role of helicopter rotor, to classify them by type, and to imagine new types of helicopter rotors that can equip future helicopters.
IONESCU Cristian Andrei
doaj