Juha Hassel

TL;DR: In this article, the authors demonstrate the dynamical Casimir effect using a Josephson metamaterial embedded in a microwave cavity at 5.4 GHz, and extract the full 4 × 4 covariance matrix of the emitted microwave radiation, demonstrating that photons at frequencies symmetrical with respect to half of the modulation frequency are generated in pairs.

TL;DR: In this article, a hybrid MEG-MRI instrumentation based on a commercial whole-head MEG device is described, which is expected to significantly reduce coregistration errors between the two modalities, to simplify MEG analysis, and to improve MEG localization accuracy.

TL;DR: A Green's function formalism is developed which quantitatively explains some observed discrepancies, e.g., the effect of a heat-absorbing substrate in the proximity of the sound source, and a generic ultimate limit for thermophone efficiency is found.

TL;DR: In this paper, an analytical model for the sensitivity with which they optimize the temperature response of resonant strings by varying geometry and material was presented, and the relative change in resonant frequency per temperature change of −1.74±0.04% was measured.

TL;DR: In this article, the authors demonstrate that a suspended metal wire array can be used to produce high-pressure sound waves over a wide spectrum using the thermoacoustic effect, and they have potential for applications especially in the ultrasound range.