Results 201 to 210 of about 460,773 (264)

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Ludger Overmeyer, Annika Raatz   +5 more
wiley   +1 more source

Non-Invasive Estimation of the Upper Boundary of the Severe Intensity Exercise Domain: The Maximal Accumulated Oxygen Deficit Method. [PDF]

Eur J Sport Sci
Peker A, As H, Jones AM, Ozkaya O.
europepmc   +1 more source

An Intelligent Floor Drain System for Self-Powered Disinfection via Low-Velocity Wastewater Energy Harvesting. [PDF]

Research (Wash D C)
Huang Z, Wang Y, Wang Y, Bowen CR, Yoon HJ, Yang Y.   +5 more
europepmc   +1 more source

Current sensorless MPPT method with battery management for PV based single phase standalone system. [PDF]

Sci Rep
Genc N, Uzmus H, Kalimbetova Z, Celik MA, Ramankulov S.   +4 more
europepmc   +1 more source

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Human Power Output

Nature, 1968
IT has been known for a long time that power output in man increases rapidly with decreasing duration of exercise, but there have been few systematic studies of this problem. Indeed, measurements of the power output of the body during a single movement lasting one-tenth of a second or less have not been made.
C T, Davies, R, Rennie
openaire   +2 more sources

Power Amplifier Protection by Adaptive Output Power Control

IEEE Journal of Solid-State Circuits, 2007
Abstract Cellular phone power amplifiers (PAs) operate in strongly varying environments and have to withstand extreme conditions. To avoid destructive breakdown a generic protection concept is proposed that is based on adaptive control of the output power.
Bezooijen, van, A., van Straten, F.E., Mahmoudi, R., Roermund, van, A.H.M.   +3 more
openaire   +2 more sources

Bounded input power-bounded output power stability criterion

Automatica, 1971
A bounded input power-bounded output power stability criterion is derived for a class of single loop control systems having a memoryless, time-invariant, non-linear operator and a causal operator in the loop. The result is established by showing that a system from this class maps the Marcinkiewicz space M"2 into itself.
Bickart, T. A., Prada, G.
openaire   +2 more sources