Lock-in & Break-out from Technological Trajectories: Modeling and policy implications [PDF]
, 2009 Arthur [1,2] provided a model to explain the circumstances that lead to technological lock-in into a specific trajectory. We contribute substantially to this area of research by investigating the circumstances under which technological development may ...
Dolfsma, Wilfred, Leydesdorff, Loet
core +9 more sources
A simple microcontroller based digital lock-in amplifier for the detection of low level optical signals [PDF]
, 2002 Traditionally digital lock-in amplifiers sample the input signal at a rate much higher than the lock-in reference frequency and perform the lock-in algorithm with high-speed processors.
Dorrington, Adrian A. +1 more
core +2 more sources
Hold-in, pull-in, and lock-in ranges of PLL circuits: rigorous mathematical definitions and limitations of classical theory [PDF]
, 2015 The terms hold-in, pull-in (capture), and lock-in ranges are widely used by engineers for the concepts of frequency deviation ranges within which PLL-based circuits can achieve lock under various additional conditions. Usually only non-strict definitions
Kuznetsov, N. V. +3 more
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Detection of composite damage by IR NDT using ultrasonic and optic excitation
MATEC Web of Conferences, 2019 The submitted paper presents experience with detection of damaged composites by means of an ultrasonic excitation system in comparison with an optic system of excitation. In case of the ultrasonic excitation system is a high-frequency signal modulated by
Dekýš Vladimír +4 more
doaj +1 more source
Journal of Fluid Science and Technology, 2009 In this study, the flow features of vortex shedding from a pair of parallel arranged circular cylinders of unequal diameter oscillating along the direction of the flow were observed by visualizing water flow experiment at the ranges of the frequency ...
Yoshifumi YOKOI, Keiko HIRAO
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Towards a bridging concept for undesirable resilience in social-ecological systems
Global Sustainability, 2020 Resilience is a cross-disciplinary concept that is relevant for understanding the sustainability of the social and environmental conditions in which we live.
André Z. Dornelles +16 more
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Investigation of the Mechanical Properties of Spur Involute Gearing by Infrared Thermography
Applied Sciences, 2023 The work aims at validating a methodology for 3D printing of gears with involute gearing and evaluating their mechanical properties using infrared camera.
Milan Sapieta +5 more
doaj +1 more source
Climate geoengineering: issues of path-dependence and socio-technical lock-in [PDF]
, 2014 As academic and policy interest in climate geoengineering grows, the potential irreversibility of technological developments in this domain has been raised as a pressing concern.
Arthur +90 more
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Numerical Simulation of Acoustic Resonance in a Duct Containing a Flat Plate
Fluids, 2022 This work is about numerical simulations of vortex induced acoustic resonance in a duct, experimentally investigated by Welsh et al. Vortex shedding of low-speed flow over a flat plate excites an acoustic duct mode, leading to a lock-in of shedding and ...
Benedict Geihe +2 more
doaj +1 more source
Large Eddy Simulation of Free Motion of Marine Riser using OpenFOAM [PDF]
한국해양공학회지, 2019 In this study, the free motion of a riser due to vortex shedding was numerically simulated with Large Eddy Simulation (LES) and Detached Eddy Simulation (DES) turbulence models.
Jae-Hwan Jung +3 more
doaj +1 more source