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We present a simple experiment that allows advanced undergraduates to learn the principles and applications of spectroscopy. The technique, known as acoustic resonance spectroscopy, is applied to study a vibrating rod. The setup includes…

We present a method for absolute calibration of received radio-frequency in the ultra low frequency (ULF), and very low frequency (VLF) range. This is achieved with the use of a radio frequency optically pumped magnetometer (RF-OPM). We…

Vibration transmission is essential in the design of comfortable vehicle seats but knowledge is lacking on 3D trunk and head motion and the role of seat back and posture. We hypothesized that head motion is reduced when participants upper…

信号处理 · 电气工程与系统科学 2022-07-06 Mojtaba Mirakhorlo , Nick Kluft , Barys Shyrokau , Riender Happee

This paper aims to bring a new lightweight yet powerful solution for the task of Emotion Recognition and Sentiment Analysis. Our motivation is to propose two architectures based on Transformers and modulation that combine the linguistic and…

计算与语言 · 计算机科学 2020-10-06 Jean-Benoit Delbrouck , Noé Tits , Stéphane Dupont

Micro-expressions are brief and subtle facial movements that convey nuanced affective information but often remain imperceptible during natural social interaction. Although prior research has primarily focused on computational recognition…

Acoustic wave modulation plays a pivotal role in various applications, including sound-field reconstruction, wireless communication, and particle manipulation, among others. However, current acoustic metamaterial and metasurface designs…

音频与语音处理 · 电气工程与系统科学 2024-03-19 Ao Chen , Xin Zhang

The presentation of a moving tactile stimulus to a person's forearm evokes a pleasant sensation. The speed, intensity, and contact area of the strokes should be systematically changed to evaluate the relationship between pleasantness and…

In this article, we compare a set of Wave Front Sensors (WFS) based on Fourier filtering technique. In particular, this study explores the "class of pyramidal WFS" defined as the 4 faces pyramid WFS, all its recent variations (6, 8 faces,…

天体物理仪器与方法 · 物理学 2017-03-10 Olivier Fauvarque , Benoit Neichel , Thierry Fusco , Jean-François Sauvage , Orion Giraut

We demonstrate experimentally and theoretically a controllable way of shifting the frequency of an optical pulse by using a combination of spectral hole burning, slow light effect, and linear Stark effect in a rare-earth-ion doped crystal.…

量子物理 · 物理学 2016-04-27 Qian Li , Yupan Bao , Axel Thuresson , Adam N. Nilsson , Lars Rippe , Stefan Kröll

The phenomenon of the displacement of the position of the pressure, intensity and acoustic radiation force maxima along the axis of focused acoustic beams under increasing driving amplitudes (nonlinear focal shift) is studied for the case…

经典物理 · 物理学 2017-09-05 Noé Jiménez , Francisco Camarena , Nuria González-Salido

Two techniques that employ equally spaced trains of optical pulses to map an optical high frequency into a low frequency modulation of the signal that can be detected in real time are compared. The development of phase-stable optical…

量子物理 · 物理学 2017-08-22 Kochise Bennett , Jeremy Rouxel , Shaul Mukamel

High finesse frequency combs (HFC) with large ratio of the frequency spacing to the width of the spectral components have demonstrated remarkable results in many applications such as precision spectroscopy and metrology. We found that low…

While vibration is a well-used output signal in HCI as part of haptic interaction, vibration outside HCI is used in many other modes to support human performance, from rehabilitation to cognition. In this late breaking work, we present…

人机交互 · 计算机科学 2023-04-24 Alexander Dawid Bincalar , M. C. Schraefel , Christopher Freeman

In high-dynamic range (HDR) analog-to-digital converters (ADCs), having many quantization bits minimizes quantization errors but results in high bit rates, limiting their application scope. A strategy combining modulo-folding with a low-DR…

信号处理 · 电气工程与系统科学 2023-11-23 Satish Mulleti , Resham Yashwanth Kumar , Laxmeesha Somappa

The ability of the auditory system to perceive the fundamental frequency of a sound even when this frequency is removed from the stimulus is an interesting phenomenon related to the pitch of complex sounds. This capability is known as…

chao-dyn · 物理学 2012-07-24 D. L. Gonzalez , L. Morettini , F. Sportolari , O. Rosso , J. H. E. Cartwright , O. Piro

We report on an experimental demonstration of surface acoustic waves monitoring on a thin metal plate with heterodyne optical holography. Narrowband imaging of local optical pathlength modulation is achieved with a frequency-tunable…

光学 · 物理学 2014-03-19 Francois Bruno , Jérôme Laurent , Daniel Royer , Michael Atlan

Facial expression recognition is an essential task for various applications, including emotion detection, mental health analysis, and human-machine interactions. In this paper, we propose a multi-modal facial expression recognition method…

计算机视觉与模式识别 · 计算机科学 2023-03-21 Jun-Hwa Kim , Namho Kim , Chee Sun Won

Achieving strongly nonreciprocal scattering in compact linear acoustic devices is a challenging task. One possible solution is the use of time-modulated resonators, however, their implementation in the realm of audible airborne acoustics is…

流体动力学 · 物理学 2024-11-26 Tinggui Chen , Matthieu Mallejac , Chuanxing Bi , Baizhan Xia , Romain Fleury

The interaction between a high-frequency dilational mode of a thin dielectric film and an optical cavity field is studied theoretically in the membrane-in-the-middle setup. A derivation from first principles leads to a multi-mode…

介观与纳米尺度物理 · 物理学 2015-03-20 K. Borkje , S. M. Girvin

People feel emotions when listening to music. However, emotions are not tangible objects that can be exploited in the music composition process as they are difficult to capture and quantify in algorithms. We present a novel musical…

人工智能 · 计算机科学 2018-10-09 Eunjeong Stella Koh , Shahrokh Yadegari