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Helmholtz at 200 [PDF]

open access: yesi-Perception, 2021
Hermann von Helmholtz was born 200 years ago, but his influence on vision research is enduring. His legacy in vision is celebrated visually with anaglyphs that combine portraits of him with illustrations from his publications.
Nicholas J. Wade
doaj   +4 more sources

Helmholtz-Manakov solitons [PDF]

open access: yesPhysical Review E, 2005
A novel spatial soliton-bearing wave equation is introduced, the Helmholtz-Manakov (H-M) equation, for describing the evolution of broad multi-component self-trapped beams in Kerr-type media. By omitting the slowly-varying envelope approximation, the H-M
Chamorro-Posada, P   +2 more
core   +5 more sources

Analytic embedding of pseudo-Helmholtz geometry [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2021
For modern geometry, the study of maximal mobility geometries is of great importance. Some of these geometries are well studied (Euclidean, pseudo-Euclidean, symplectic, spherical, Lobachevsky, etc.), and others are poorly understood (Helmholtz, pseudo ...
Kyrov, Vladimir A.
doaj   +1 more source

The vision of Helmholtz [PDF]

open access: yesJournal of the History of the Neurosciences, 2021
Hermann Ludwig Ferdinand von Helmholtz (1821-1894) began investigating vision at a time when its study was undergoing a revolution. Laboratory experiments were augmenting the long history of naturalistic observations. Instruments of stimulus control enabled the manipulation of time and space in ways that had not been possible previously, and Helmholtz ...
openaire   +3 more sources

Optimum tuning of damped Helmholtz silencer using an equivalent discrete model and considering open-end correction

open access: yesMechanical Engineering Journal, 2021
This paper describes the optimum tuning of damped Helmholtz silencers. In this study, Helmholtz resonators are used as silencers that suppress acoustic resonance in host acoustic fields. Side branch silencers and Helmholtz silencers are commonly known as
Keisuke YAMADA   +4 more
doaj   +1 more source

Piezoelectric Micromachined Ultrasonic Transducer-Integrated Helmholtz Resonator with Microliter-Sized Volume-Tunable Cavity

open access: yesSensors, 2022
In this study, a piezoelectric micromachined ultrasonic transducer (PMUT) is integrated with a microliter-sized volume-tunable Helmholtz resonator. The passive Helmholtz resonator is constructed using an SU8 photolithography-defined square opening plate ...
Guo-Hua Feng, Wen-Sheng Chen
doaj   +1 more source

Solving the Helmholtz Equation Together with the Cauchy Boundary Conditions by a Modified Quasi-Reversibility Regularization Method

open access: yesJournal of Mathematics, 2022
The Quasi-Reversibility Regularization Method (Q-RRM) provides stable approximate solution of the Cauchy problem of the Helmholtz equation in the Hilbert space by providing either additional information in the Laplace-type operator in the Helmholtz ...
Benedict Barnes   +3 more
doaj   +1 more source

Case studies on aeroacoustics damping performances of Coupled Helmholtz Resonators over low frequency ranges

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2023
Helmholtz resonators are widely applied in industries to reduce the transmission of unwanted noise and passively attenuate tonal noise in pipes/ducts. For example, internal combustion engines take advantage of Helmholtz resonators by combining air box ...
Zhiguo Zhang, Chenzhen Ji, Yin Mya Win
doaj   +1 more source

Hermann von Helmholtz's empirico-transcendentalism reconsidered: construction and constitution in Helmholtz's psychology of the object [PDF]

open access: yes, 2014
This paper aims at contributing to the ongoing efforts to get a firmer grasp of the systematic significance of the entanglement of idealism and empiricism in Helmholtz's work.
Bell   +69 more
core   +1 more source

Induction et déduction

open access: yesPhilosophia Scientiæ, 2005
We propose a French translation of the preface written by H. nov Helmholtz to the second part of volume one of the translation of the Treatise on Natural Philosophy due to Sir William Thompson and Tait.
Hermann von Helmholtz
doaj   +1 more source

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