522 research outputs found
Reflection Ptychography via Auto Differentiation on a High Harmonic EUV beamline
No full textWe demonstrate our beamline using a table-top HHG EUV source for lensless imaging application in reflection m ode. T he s ample r eflection fu nction is reconstructed using an auto-differentiation based ptychographic algorithm built on TensorFlow platform.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.ImPhys/Coene groupImPhys/Optic
Persistent grammatical writing errors of L1 and L2 learners of French: analysis and remedy
No full textCoene, M.M.R. [Promotor]Rooryck, J.E.C.V. [Promotor]Sleeman, A.P. [Copromotor
Projet de l'administration en 1886... Projet de M. de Coene
No full textÉchelle(s) : 1:100 000Appartient à l’ensemble documentaire : BNormand1Appartient à l’ensemble documentaire : HNormand
Extreme ultraviolet lensless imaging without object support through rotational diversity in diffractive shearing interferometry
No full textWe report on a method that allows microscopic image reconstruction from extreme-ultraviolet diffraction patterns without the need for object support constraints or other prior knowledge about the object structure. This is achieved by introducing additional diversity through rotation of an object in a rotationally asymmetric probe beam, produced by the spatial interference between two phase-coherent high-harmonic beams. With this rotational diffractive shearing interferometry method, we demonstrate robust image reconstruction of microscopic objects at wavelengths around 30 nm, using images recorded at only three to five different object rotations.ImPhys/Optic
A Non-linear Signal Processing Model for Signal Generation in Multilevel Two Dimensional Optical Storage
No full textA two-dimensional optical storage (TwoDOS) format with binary modulation is being developed in which channel bits are arranged on a two-dimensional hexagonal lattice [W. M. J. Coene, in Optical Data Storage, Vol. 88 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2003), pp. 90–92]. The aim is to increase the capacity by a factor of 2 and the data rate by a factor of 10 over third-generation Blu-ray Disc technology. Following a route similar to that used in one-dimensional conventional optical storage [Jpn. J. Appl. Phys. 42, 1074 (2003)] could lead to a further increase in capacity by the addition of another dimension to writing data, such as the use of multiple levels instead of the two levels (pit and land) used in the binary TwoDOS disk format. We present a nonlinear signal-processing model for signal waveform generation as a function of the M -ary channel symbols, as well as simulated signal readouts for multilevel TwoDOS
La Seine rade de guerre / par M. de Coene,... ; Société de défense des intérêts de la vallée de la Seine
No full textAppartient à l’ensemble documentaire : HNormand1Appartient à l’ensemble documentaire : IledeFr1Appartient à l’ensemble documentaire : Rtmgus1Avec mode text
Leukotriene B4 production by stimulated whole blood: comparative studies with isolated polymorphonuclear cells
No full textCombining ptychographical algorithms with the Hybrid Input-Output (HIO) algorithm
No full textAbstractIn this article we combine the well-known Ptychographical Iterative Engine (PIE) with the Hybrid Input-Output (HIO) algorithm. The important insight is that the HIO feedback function should be kept strictly separate from the reconstructed object, which is done by introducing a separate feedback function per probe position. We have also combined HIO with floating PIE (fPIE) and extended PIE (ePIE). Simulations indicate that the combined algorithm performs significantly better in many situations. Although we have limited our research to a combination with HIO, the same insight can be used to combine ptychographical algorithms with any phase retrieval algorithm that uses a feedback function
When plural means mass: a new perspective on 'notional' and 'grammatical' plurality
No full textThis contribution offers an analysis of interpretable and non-interpretable instances of plural morphology on nouns and verb
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