Results 71 to 80 of about 5,334,894 (402)

A Novel Central Camera Calibration Method Recording Point-to-Point Distortion for Vision-Based Human Activity Recognition

Sensors, 2022
The camera is the main sensor of vison-based human activity recognition, and its high-precision calibration of distortion is an important prerequisite of the task. Current studies have shown that multi-parameter model methods achieve higher accuracy than
Ziyi Jin, Zhixue Li, Tianyuan Gan, Zuoming Fu, Chongan Zhang, Zhongyu He, Hong Zhang, Peng Wang, Jiquan Liu, Xuesong Ye   +9 more
doaj   +1 more source

Experimental observation of speckle instability in nonlinear disordered media

, 2005
Temporal fluctuations of the speckle pattern formed upon backscattering of a laser beam from an interface between gold and nonlinear polymer film have been observed as a function of optical power.
Agarwal, Ali Gungor, Bliokh, Bosacchi, Bozhevolnyi, Christopher C. Davis, Hickernell, Igor I. Smolyaninov, Kadomzev, Krug, Landau, McGurn, Seal, Shadrivov, Skipetrov, Smolyaninov, Smolyaninov, Spivak, Weber, West, Wiersma, Wysin, Yang, Zakharov, Zayats, Zeldovich   +25 more
core   +1 more source

Objective speckle displacement: an extended theory for the small deformation of shaped objects [PDF]

, 2014
This paper describes an extended and improved theory of the displacement of the objective speckle pattern resulting from displacement and/or deformation of a coherently illuminated diffuse object. Using the theory developed by Yamaguchi [Opt.
Charrett, Thomas O. H., Tatam, Ralph P.
core   +1 more source

Leveraging current insights on IL‐10‐producing dendritic cells for developing effective immunotherapeutic approaches

FEBS Letters, EarlyView.
In vivo IL‐10 produced by tissue‐resident tolDC is involved in maintaining/inducing tolerance. Depending on the agent used for ex vivo tolDC generation, cells acquire common features but prime T cells towards anergy, FOXP3+ Tregs, or Tr1 cells according to the levels of IL‐10 produced. Ex vivo‐induced tolDC were administered to patients to re‐establish/
Konstantina Morali, Gloria Giacomello, Michela Vuono, Silvia Gregori   +3 more
wiley   +1 more source

Refining the NaV1.7 pharmacophore of a class of venom‐derived peptide inhibitors via a combination of in silico screening and rational engineering

FEBS Letters, EarlyView.
Venom peptides have shown promise in treating pain. Our study uses computer screening to identify a peptide that targets a sodium channel (NaV1.7) linked to chronic pain. We produced the peptide in the laboratory and refined its design, advancing the search for innovative pain therapies.
Gagan Sharma, Jennifer R. Deuis, Xinying Jia, Theo Crawford, Sassan Rahnama, Eivind A. B. Undheim, Irina Vetter, Yanni K. ‐Y. Chin, Mehdi Mobli   +8 more
wiley   +1 more source

Multi-dimensional assessment of nano/micro scale surface texture using laser speckle pattern analysis

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2015
Nano/micro scale surface structure on precision machined parts dominates the various product functions such as friction, wear resistance, corrosion, fatigue, and wetting.
Motochika SHIMIZU, Hiroshi SAWANO, Hayato YOSHIOKA, Hidenori SHINNO   +3 more
doaj   +1 more source

Twisted speckle entities inside wavefront reversal mirrors

, 2009
The previously unknown property of the optical speckle pattern reported. The interference of a speckle with an oppositely moving phase-conjugated speckle wave produces a randomly distributed ensemble of a twisted entities (ropes) surrounding optical ...
A. Yu Okulov, B. Y. Zeldovich, L. P. Pitaevskii, M. S. Soskin, N. B. Baranova, N. G. Basov, Y. S. Kivshar   +6 more
core   +1 more source

Development of a versatile speckle pattern of nano-sized polymer particles for high-resolution SEM-DIC

Polymer Testing, 2023
Digital image correlation (DIC) in combination with Scanning Electron Microscopy (SEM) and in-situ mechanical testing has great potential to study the micro-mechanical behavior of materials.
Olivier Verschatse, Wim Van Paepegem, Karen De Clerck, Lode Daelemans   +3 more
doaj  

Dynamic instability of speckle patterns in nonlinear random media [PDF]

J. Opt. Soc. Am. B 21(1) 168-176 (2004), 2003
Linear stability analysis of speckle pattern resulting from multiple, diffuse scattering of coherent light waves in random media with intensity-dependent refractive index (noninstantaneous Kerr nonlinearity) is performed. The speckle pattern is shown to become unstable with respect to dynamic perturbations within a certain frequency band, provided that
arxiv   +1 more source

Instabilities of waves in nonlinear disordered media

, 2000
We develop a self-consistent theory of temporal fluctuations of a speckle pattern resulting from the multiple scattering of a coherent wave in a weakly nonlinear disordered medium.
A. A. Golubentsev, A. A. Golubentsev, A. Heiderich, A. Yu. Zyuzin, B. Shapiro, B. Spivak, D. Bicout, D. J. Pine, D. S. Wiersma, F. T. Arecchi, G. Maret, H. M. Gibbs, J. C. J. Paasschens, J. F. de Boer, J. V. Moloney, M. J. Stephen, R. Bressoux, R. E. de Araujo, R. Maynard, R. Pnini, R. Pnini, S. E. Skipetrov, V. E. Kravtsov, V. E. Kravtsov, V. E. Zakharov, V. L. Ginzburg, V. M. Agranovich, V. M. Agranovich, V. S. Letokhov, V. S. Letokhov, Y. R. Shen   +30 more
core   +2 more sources