Results 71 to 80 of about 860,460 (345)

Magnetic Anomaly Signal Detection Using Parallel Monostable Stochastic Resonance System

IEEE Access, 2020
The nonlinear stochastic resonance (SR) system possesses the ability of taking advantage of noise to enhance the weak signal when the SR system, signal and noise reach to the matching relation.
Wang Liu, Zhongyan Liu, Qi Zhang, Yujing Xu, Shuchang Liu, Zhuo Chen, Canlin Zhu, Ze Wang, Mengchun Pan, Jiafei Hu, Peisen Li   +10 more
doaj   +1 more source

Cavity-free nondestructive detection of a single optical photon

, 2015
Detecting a single photon without absorbing it is a long standing challenge in quantum optics. All experiments demonstrating the nondestructive detection of a photon make use of a high quality cavity.
Johnsson, Mattias, Knight, Peter L., Twamley, Jason, Xia, Keyu   +3 more
core   +1 more source

Weak lensing surveys and the intrinsic correlation of galaxy ellipticities [PDF]

, 2000
We explore the possibility that an intrinsic correlation between galaxy ellipticities arising during the galaxy formation process may account for part of the shear signal recently reported by several groups engaged in weak lensing surveys.
Bernardeau F., Binggeli B., Blandford R. D., Catelan P., Catelan P., Catelan P., Christopher A. Metzler, Ciotti L., Coutts A., de Theije P. A. M., Dekel A., Flin P., Flin P., Fong R., Garrido J. L., Kaiser N., Maddox S., Muriel H., Rupert A. C. Croft   +18 more
core   +2 more sources

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

Coherent Detection of Ultra-weak Electromagnetic Fields

, 2018
We explore the application of heterodyne interferometry for a weak-field coherent detection scheme. The methods detailed here will be used in ALPS II, an experiment designed to search for weakly-interacting, sub-eV particles.
Barke, Simon, Bush, Zachary R., Hallal, Ayman, Hollis, Harold, Messineo, Giuseppe, Mueller, Guido, Spector, Aaron D., Tanner, D. B.   +7 more
core   +1 more source

Multiple ETS family transcription factors bind mutant p53 via distinct interaction regions

FEBS Letters, EarlyView.
Mutant p53 gain‐of‐function is thought to be mediated by interaction with other transcription factors. We identify multiple ETS transcription factors that can bind mutant p53 and found that this interaction can be promoted by a PXXPP motif. ETS proteins that strongly bound mutant p53 were upregulated in ovarian cancer compared to ETS proteins that ...
Stephanie A. Metcalf, Nicholas F. Downing, Kaitlyn M. Mills, Samuel C. Metcalfe, Alexander E. Kritzer, Lindsey D. Mayo, Peter C. Hollenhorst   +6 more
wiley   +1 more source

Discovery of a very weak magnetic field on the Am star Alhena

, 2016
Alhena ($\gamma$ Gem) was observed in the frame of the BRITE (BRIght Target Explorer) spectropolarimetric survey, which gathers high resolution, high signal-to-noise, high sensitivity, spectropolarimetric observations of all stars brighter than V=4 to ...
Blazère, Aurore, Neiner, Coralie, Petit, Pascal   +2 more
core   +3 more sources

Weak Gravitational Lensing by Voids [PDF]

, 1998
We consider the prospects for detecting weak gravitational lensing by underdensities (voids) in the large-scale matter distribution. We derive the basic expressions for magnification and distortion by spherical voids. Clustering of the background sources
Amendola, Luca, Frieman, Joshua A., Waga, Ioav   +2 more
core   +2 more sources

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Weak target detection technology of passive radar on the navigation satellite signal

The Journal of Engineering, 2019
The passive radar detection system receives secondary reflection signal by the navigation satellite signal. The secondary reflection signal is too weak to detect the target.
Xiaoyan Fan, She Shang, Dawei Song, Wenfeng Sun, Yuanyuan Wen   +4 more
doaj   +1 more source