Results 91 to 100 of about 113,864 (320)

Foot progression angle estimation using a single foot-worn inertial sensor

Journal of NeuroEngineering and Rehabilitation, 2021
Background The foot progression angle is an important measure used to help patients reduce their knee adduction moment. Current measurement systems are either lab-bounded or do not function in all environments (e.g., magnetically distorted).
Frank J. Wouda, Stephan L. J. O. Jaspar, Jaap Harlaar, Bert-Jan F. van Beijnum, Peter H. Veltink   +4 more
doaj   +1 more source

Using In Situ TEM to Understand the Surfaces of Electrocatalysts at Reaction Conditions: Single‐Atoms to Nanoparticles

Advanced Functional Materials, EarlyView.
This review summarizes recent advances in closed‐cell in situ TEM strategies for accurate determination of the activity and stability of single‐atom catalyst systems during operation. Operando conditions causing dynamic changes of SAC systems are highlighted and we explain why ensemble average‐based optical techniques may benefit from the technological
Martin Ek, Soshan Cheong, Julie Cairney, Richard D. Tilley, Ingemar Persson   +4 more
wiley   +1 more source

Attitude Determination Algorithms through Accelerometers, GNSS Sensors, and Gravity Vector Estimator

International Journal of Aerospace Engineering, 2018
Aircraft and spacecraft navigation precision is dependent on the measurement system for position and attitude determination. Rotation of an aircraft can be determined measuring two vectors in two different reference systems.
Raúl de Celis, Luis Cadarso
doaj   +1 more source

On reference frames in spacetime and gravitational energy in freely falling frames

, 2007
We consider the interpretation of tetrad fields as reference frames in spacetime. Reference frames may be characterized by an antisymmetric acceleration tensor, whose components are identified as the inertial accelerations of the frame (the translational
F F Faria, Hartle J B, Hehl F H, Hehl F W Bergmann P G de Sabbata V, J W Maluf, Maluf J W, Maluf J W, Mashhoon B, S C Ulhoa   +8 more
core   +1 more source

Mesoporous Carbon Thin Films with Large Mesopores as Model Material for Electrochemical Applications

Advanced Functional Materials, EarlyView.
Mesoporous carbon thin films possessing 70 nm mesopores are prepared on titanium substrates by soft templating of resol resins with a self‐synthesized poly(ethylene oxide)‐block‐poly(hexyl acrylate) block copolymer. A strategy to avoid corrosion of the metal substrate is presented, and the films are extensively characterized in terms of morphology ...
Lysander Q. Wagner, Joshua Schober, Pascal Dippell, Chantal Glatthaar, Smail Mekhilef, David Schäfer, Hannes Hergert, Marcus Rohnke, Matthias T. Elm, Bernd M. Smarsly   +9 more
wiley   +1 more source

Klein–Gordon Oscillator in a Topologically Nontrivial Space-Time

Advances in High Energy Physics, 2019
In this study, we analyze solutions of the wave equation for scalar particles in a space-time with nontrivial topology. Solutions for the Klein–Gordon oscillator are found considering two configurations of this space-time.
L. C. N. Santos, C. E. Mota, C. C. Barros   +2 more
doaj   +1 more source

Wetting Interactions Between Porous Carbon Hosts and Liquid Sodium‐Potassium Alloys Toward Their Use in Negative Electrodes of Alkali‐Metal Batteries

Advanced Functional Materials, EarlyView.
Porous carbon host materials are investigated for their possible usage in liquid alkali‐metal negative electrodes. X‐ray computed tomography reveals pore‐filling behavior under various conditions: non‐wetting, forced wetting, and spontaneous wetting. The applicability of porous carbon in electrochemical cells is demonstrated at high areal capacities ...
Johannes Baller, André Hilger, Naiyu Qi, Chiara Morini, Andrea Cornelio, Arndt Remhof, Markus Osenberg, Ingo Manke, Julian Moosmann, Felix Beckmann, Gustav Graeber   +10 more
wiley   +1 more source

Decoherence and multipartite entanglement of non-inertial observers

, 2012
Decoherence effect on multipartite entanglement in non-inertial frames is investigated. GHZ state is considered to be shared between the partners with one partner in inertial frame whereas the other two in accelerated frames. One-tangle and {\pi}-tangles
Ramzan, M.
core   +1 more source

Functionalized Reduced Graphene Oxide‐Based Nanocomposite Hydrogels for Enhanced Osteogenesis in Bone Tissue Engineering

Advanced Healthcare Materials, EarlyView.
Charge‐opposed reduced graphene oxide fillers are co‐integrated into biopolymeric nanocomposite scaffolds, synergistically enhance osteogenesis. Multiscale characterization reveals how surface chemistry and porosity dictate ectopic mineral architecture.
George Mihail Vlăsceanu, Cătălina Ionela Zamfir, Cornel Baltă, Hildegard Herman, Alina Ciceu, Maria Alexandra Duma, Mariana Ioniță, Roxana‐Cristina Popescu, Anca Hermenean   +8 more
wiley   +1 more source

An Innovative Procedure for Calibration of Strapdown Electro-Optical Sensors Onboard Unmanned Air Vehicles

Sensors, 2010
This paper presents an innovative method for estimating the attitude of airborne electro-optical cameras with respect to the onboard autonomous navigation unit.
Attilio Rispoli, Antonio Moccia, Domenico Accardo, Giancarmine Fasano   +3 more
doaj   +1 more source