Results 201 to 210 of about 101,768 (266)

Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser

Advanced Science, EarlyView.
An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu, Aswathy Sundaresan, Nazire‐Begüm Kazkal, Clement Lafargue, Lior Zarfaty, Li‐Gang Wang, Ofek Birnholtz, Dominique Decanini, Melanie Lebental, Patrick Sebbah   +9 more
wiley   +1 more source

A Non‐Mitophagy Activity of BNIP3L/NIX in Amygdala Glutamatergic Neurons is Essential for Contextual Fear Memory Formation

Advanced Science, EarlyView.
Contextual fear conditioning induces BNIP3L‐dependent mitochondrial fission in glutamatergic neurons of the BLA, independently of mitophagy. Loss of BNIP3L elevates Drp1Ser637 phosphorylation, thereby suppressing mitochondrial fission, compromising ATP production, and attenuating excitatory synaptic transmission.
Xingxian Zhang, Xinlei Mo, Xinyu Zhou, Xiaoliang Liu, Guizhi Li, Songhui Hu, Yangyang Lu, Chenze Zhu, Jinxi Feng, Zhitong Chen, Weiwei Hu, Yihui Cui, Zhong Chen, Xiangnan Zhang   +13 more
wiley   +1 more source

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ACOUSTIC SIGNAL PROCESSING APPARATUS AND ACOUSTIC SIGNAL PROCESSING METHOD

The Journal of the Acoustical Society of America, 2012
An apparatus for performing processing of an input acoustic signal to be reproduced by a loudspeaker, which generates a harmonic of a low pitch sound component equal to or lower than a predetermined low cutoff frequency, and generates a harmonic synthesized acoustic signal synthesizing the input signal with the harmonic.
Tsuguto Maruko, Naotaka Saito
openaire   +1 more source

Machine analysis of acoustical signals

Pattern Recognition, 1983
Research toward machine analysis of acoustical signals is described. The approach Is that of the expert system, where knowledge about the physical world that produced the signals is used by the system in the interpretation process. Expert systems have already matched human capabilities in certain applications such as chemical structure analysis and ...
Joseph N. Maksym, Anthony J. Bonner, C. Ann Dent, Gavin L. Hemphill   +3 more
openaire   +1 more source

How cicadas interpret acoustic signals

Nature, 2000
The vertebrate ear can analyse the frequency components of sound with high resolution, recognizing complex acoustic signals even against a noisy background1. By contrast, insect ears can separate only broad-frequency bands, resulting in a categorical perception of sound2.
P J, Fonseca, D, Münch, R M, Hennig
openaire   +2 more sources

Classification of transient signals (acoustic signals)

ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003
The authors are concerned with the classification of transient signals. Spectral ratio distance measures operating on the parametric spectra of the transient signals are used to perform classification. Performance of the classification algorithm is studied analytically and experimentally using both synthetic and real data.
K. Lashkari, B. Friedlander, J. Abel, B. McQuiston   +3 more
openaire   +1 more source

Acoustical signal apparatus

The Journal of the Acoustical Society of America, 1979
An improved air horn is provided which includes a housing having an inlet for receiving a pressure medium to operate the horn and an outlet for the pressure medium. A first chamber is disposed between the inlet and outlet and receives the pressure medium from the inlet.
openaire   +1 more source