Results 111 to 120 of about 6,836 (299)

OBSERVATION OF INSTABILITIES AND CHAOS IN A HOMOGENEOUSLY BROADENED SINGLE MODE AND MULTIMODE MIDINFRARED RAMAN LASER.

open access: yes, 1985
Observation of instabilities leading to chaos are reported in the emission from a single mode homogeneously broadened laser. For this system, a short laser cavity NH NH//3 near-resonantly pumped by pulsed CO//2 laser radiation and operating at 12 mu m ...
Harrison, R. G.   +2 more
core  

Technology Transfer to Underwater Archaeology: The LAHKE Project at the Submerged Neolithic Site of La Marmotta

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT This document is a report on the field application of non‐invasive geophysical and robotic prospecting methods at the submerged Neolithic site of La Marmotta (Lake Bracciano, Italy), within the LAHKE (LAke Heritage Knowledge and Exploration) project; the study focuses on the practical validation, adaptation and transfer of existing ...
dell' Erba Ramiro   +4 more
wiley   +1 more source

Nonlinear vibration suppression of an NES-HVI system using hybrid PD–NDF control

open access: yesJournal of Taibah University for Science
This study investigates the nonlinear dynamic behavior, bifurcation characteristics, and vibration suppression performance of a nonlinear energy sink–hybrid vibration isolator (NES-HVI) controlled using a hybrid proportional–derivative and nonlinear ...
Hany S. Bauomy   +2 more
doaj   +1 more source

Parametric chaos generator operating on a varactor diode with the instability limitation decay mechanism

open access: yes, 2016
Equations are derived for a parametric chaos generator containing three oscillatory circuits and a variable-capacitance diode (varactor) and are reduced to equations for slow amplitudes of parametrically interacting modes.
Kuznetsov, Sergey P.
core   +1 more source

Prescribing competence: The pros and cons of different methods for assessment

open access: yesBritish Journal of Clinical Pharmacology, EarlyView.
Evaluating a medical graduate’s competence in rational prescribing is challenging. With the aim to guide and inspire teachers, this narrative review explores different methods that can be used to assess prescribing competence. Each method has its own advantages and disadvantages, and thus a mix of different assessment methods is needed throughout the ...
David J. Brinkman   +3 more
wiley   +1 more source

Nonlinear analysis of rotor-stator dynamic system with gear transmission under water lubrication bearing

open access: yesJournal of Low Frequency Noise, Vibration and Active Control
This study presents a comprehensive nonlinear dynamic analysis of a water-lubricated bearing–gear–rotor system by incorporating the effects of turbulent mixed lubrication and system damping.
Cai-Wan Chang-Jian   +2 more
doaj   +1 more source

Gain Scheduling using Chaos Theory

open access: yes, 2007
We consider output regulation for SISO nonlinear plants by gain scheduling on the plant output. The objective of design is to keep the states within prescribed bound from their instantaneous trim values and output asymptotic tracking of reference signal.
Mayank Amin
core  

Instabilities and Routes to Chaos in Passive All-Optical Resonators Containing a Molecular Gas

open access: yes, 1986
Dispersive optical bistability and instabilities leading to period doubling, higher harmonics, and chaos in an all-optical passive quantum system are discussed theoretically and experimentally.
I. A. Al-Saidi   +5 more
core   +1 more source

Listening to Hong Kong children's perspectives through pretend play

open access: yesBritish Educational Research Journal, EarlyView.
Abstract Quality in early childhood education and care (ECEC) has become an increasing concern in recent years. The issue has been regularly discussed by different stakeholders. However, the rising concern regarding quality in ECEC has not seriously taken into account children's perspectives.
Suzannie K. Y. Leung
wiley   +1 more source

Chance-constrained AC optimal power flow: A polynomial chaos approach

open access: yes, 2019
As the share of renewables in the grid increases, the operation of power systems becomes more challenging. The present paper proposes a method to formulate and solve chance-constrained optimal power flow while explicitly considering the full nonlinear ac
Mühlpfordt, Tillmann   +4 more
core   +2 more sources

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