Results 51 to 60 of about 640,436 (346)

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

A quantum phase gate implementation for trapped ions in thermal motion

, 2002
We propose a novel scheme to implement a quantum controlled phase gate for trapped ions in thermal motion with one standing wave laser pulse. Instead of applying the rotating wave approximation this scheme makes use of the counter-rotating terms of ...
A. Barenco, A. Sørensen, B.E. Kane, C. D’Helon, C. Monroe, C. Monroe, D. Loss, Daniel Jonathan, I. Chuang, J. Steinbach, J.F. Poyatos, J.F. Poyatos, J.I. Bollinger, J.I. Cirac, K. Mølmer, K. Pahlke, Lov K. Grover, Q.A. Turchette, S. Mancini, W. Mathis, XuBo Zou, Y. Makhlin   +21 more
core   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

Research and design of pulse wave sphygmomanometer based on RNN

Dianzi Jishu Yingyong, 2018
Aiming at the inconvenience and discontinuity of traditional cuff sphygmomanometer, a portable pulse wave sphygmomanometer is designed. The sphygmomanometer collects the pulse wave signal of the finger end through the photoelectric sensor，preprocesses ...
Liu Yanping, Li Jie, Jin Fei
doaj   +1 more source

A learning-based image processing approach for pulse wave velocity estimation using spectrogram from peripheral pulse wave signals: An in silico study

Frontiers in Physiology, 2023
Carotid-to-femoral pulse wave velocity (cf-PWV) is considered a critical index to evaluate arterial stiffness. For this reason, estimating Carotid-to-femoral pulse wave velocity (cf-PWV) is essential for diagnosing and analyzing different cardiovascular ...
Juan M. Vargas, Mohamed A. Bahloul, Taous-Meriem Laleg-Kirati, Taous-Meriem Laleg-Kirati   +3 more
doaj   +1 more source

Challenges during Flash Lamp Annealing of Aerosol‐Deposited Barium Titanate Films

Advanced Engineering Materials, EarlyView.
Aerosol deposition is used to rapidly deposit barium titanate films with thicknesses ranging from 2 to 16 μm at room temperature, eliminating the need for further densification. However, to recover the electromechanical properties, annealing is required, which limits the usage of temperature‐sensitive substrates.
Michel Kuhfuß, Juliette Cardoletti, Udo R. Eckstein, Shaoxiong Xie, Alexander Martin, Ken‐ichi Kakimoto, Sebastjan Glinšek, Kyle G. Webber   +7 more
wiley   +1 more source

Resonant Absorption as Mode Conversion? II. Temporal Ray Bundle

, 2010
A fast-wave pulse in a simple, cold, inhomogeneous MHD model plasma is constructed by Fourier superposition over frequency of harmonic waves that are singular at their respective Alfven resonances.
Chris S. Hanson, D.H. Bailey, P.S. Cally, Paul S. Cally   +3 more
core   +1 more source

Hybrid Auxetic Architectures: Integrating Curvature‐Driven Design for Enhanced Mechanical Tunability and Structural Performance

Advanced Engineering Materials, EarlyView.
Curvature‐tuned auxetic lattices are designed, fabricated, and mechanically characterized to reveal how geometric curvature governs stretchability, stress redistribution, and Poisson's ratio evolution. Photoelastic experiments visualize stress pathways, while hyperelastic simulations quantify deformation mechanics.
Shuvodeep De, Giovanni Meli, Meysam Khalighian, Anahita Emami   +3 more
wiley   +1 more source

A Study on the Influence of Pulse Wave Shape and Pulse Rate Variation on the Menstrual Cycle and Dysmenorrhea [PDF]

BIO Web of Conferences
Background: Pulse wave, as a carrier of human hemodynamic parameters, can reflect the hemodynamic state of the menstrual cycle. Objective: To explore the influence of pulse wave shape and pulse rate variation on menstrual cycle and dysmenorrhea. Methods:
Lian Cuiting, Yang Lin, Li Ziwei, Zhao Hongyang, Li Yashuang, Hao Dongmei, Li Guangfei, Yang Yimin, Li Xuwen   +8 more
doaj   +1 more source

Compensation for channel dispersion by nonlinear optical phase conjugation [PDF]

, 1979
It is proposed that the process of nonlinear optical phase conjugation can be utilized to compensate for channel dispersion and hence to correct for temporal pulse broadening.
Fekete, Dan, Pepper, David M., Yariv, Amnon   +2 more
core   +1 more source