Results 31 to 40 of about 251,592 (268)

Structured beams invariant to coherent diffusion

Optics Express, 2020
Bessel beams are renowned members of a wide family of non-diffracting (propagation-invariant) fields. We report on experiments showing that non-diffracting fields are also immune to diffusion. We map the phase and magnitude of structured laser fields onto the spatial coherence between two internal states of warm atoms undergoing diffusion.
Slava Smartsev, Ronen Chriki, David Eger, Ofer Firstenberg, Nir Davidson   +4 more
openaire   +3 more sources

Viscous damage model for timoshenko beam structures [PDF]

International Journal of Solids and Structures, 1997
A local damage constitutive model based on Kachanov’s theory is used within a finite element frame and applied to the case of 2D and 3D Timoshenko beam elements. The model takes into account viscous effects, thus allowing damping to be considered in a rigorous way.
Barbat, A. H., Oller, S., Oñate, E., Hanganu, A.   +3 more
openaire   +4 more sources

Electron-beam patterned calibration structures for structured illumination microscopy

Scientific Reports, 2022
AbstractSuper-resolution fluorescence microscopy can be achieved by image reconstruction after spatially patterned illumination or sequential photo-switching and read-out. Reconstruction algorithms and microscope performance are typically tested using simulated image data, due to a lack of strategies to pattern complex fluorescent patterns with ...
Hari, S. (author), Slotman, Johan A. (author), Vos, Y. (author), Floris, Christian (author), van Cappellen, W.A. (author), Hagen, C.W. (author), Stallinga, S. (author), Houtsmuller, A.B. (author), Hoogenboom, J.P. (author)   +8 more
openaire   +6 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

Analysis of Strengths of Reinforced Concrete Beam Structures with CFRP Sheet Using Abaqus Software 6.14

Jurnal Teknik Sipil dan Perencanaan, 2019
. Concrete beams are parts of a structure that serves as a channeling moment to the column structure. The structure of the beam which has undergone yielding reinforcement must be repaired.
Ahmad Yasir, Mahmud Kori Effendi, Arie Taveriyanto, Henry Apriyatno   +3 more
doaj   +1 more source

Multi-structured-beam optical parametric oscillator

Optics Express, 2020
Structured beams, conventionally generated through the spatial mode conversion of the Gaussian laser beams, have attracted great interest in recent years. Optical parametric oscillators (OPOs) have demonstrated the potential for the generation of tunable structured beams directly from an input pump source.
Varun Sharma, S. Chaitanya Kumar, G. K. Samanta, M. Ebrahim-Zadeh   +3 more
openaire   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

LDAcoop: Integrating non‐linear population dynamics into the analysis of clonogenic growth in vitro

Molecular Oncology, EarlyView.
Limiting dilution assays (LDAs) quantify clonogenic growth by seeding serial dilutions of cells and scoring wells for colony formation. The fraction of negative wells is plotted against cells seeded and analyzed using the non‐linear modeling of LDAcoop.
Nikko Brix, Daniel Samaga, Katharina Gehr, Benedek Dankó, Mohamed Schumann, Guido Drexler, Ahmed Alnatsha, Georg Beyer, Ujjwal Mahajan, Martin Selmansberger, Julia Mayerle, Claus Belka, Horst Zitzelsberger, Kirsten Lauber   +13 more
wiley   +1 more source

Lengthwise Crack Study of a Beam with Non-Linear Creep

Engineering Transactions
An analytical study of the strain energy release rate for an inhomogeneous beam structure with a lengthwise crack subjected to non-linear creep is developed. The beam is inhomogeneous along its length.
Victor Iliev RIZOV
doaj   +1 more source

Astigmatic-Invariant Structured Singular Beams

Photonics, 2022
We investigate the transformation of structured Laguerre–Gaussian (sLG) beams after passing through a cylindrical lens. The resulting beam, ab astigmatic structured Laguerre–Gaussian (asLG) beam, depends on quantum numbers (n,ℓ) and three parameters. Two of them are control parameters of the initial sLG beam, the amplitude ϵ and phase θ.
Alexander Volyar, Eugeny Abramochkin, Yana Akimova, Mikhail Bretsko   +3 more
openaire   +2 more sources