3D Images of Materials Structures

Ohser, Joachim; Schladitz, Katja

doi:10.1002/9783527628308

Cited by 198 publications

(206 citation statements)

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“…The core of the model is a Laguerre tessellation with respect to a dense packing of balls with independent and lognormal distributed diameters (cv = 0.2). For details see Ohser and Schladitz (2009), Chapter 7. The primary open cell foam is coated by grafted flexible polymers that carry charged residues.…”

Section: Discussionmentioning

confidence: 99%

Imaging of Fluorophores in Chromatographic Beads, Reconstruction of Radial Density Distributions and Characterisation of Protein Uptaking Processes

Stanislawski

Schmit²,

Ohser

2010

Image Anal Stereol

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A new adjustment calculus is presented to determine the true intraparticle distribution of bound protein within chromatographic beads from confocal fluorescence slice series. The calculus does not require knowledge about optical properties of different chromatographic materials like refractive index and turbidity, but it depends on a parameter which can be adjusted interactively. The algorithm is of complexity O(n) where n is the pixel number. From the reconstructed data we compute the parameters of the protein uptaking process using a model-based approach. It is demonstrated that the protein uptaking rates of the beads strongly dependent on the conditions of the fluid phase influencing the strength of protein surface interaction.

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Section: Discussionmentioning

confidence: 99%

Imaging of Fluorophores in Chromatographic Beads, Reconstruction of Radial Density Distributions and Characterisation of Protein Uptaking Processes

Stanislawski

Schmit²,

Ohser

2010

Image Anal Stereol

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“…It holds that h 1 (r) → ∞ as r ↓ 0, i.e., h 1 (r) is not a correlation function of a GRF. Nonetheless, the covariance measure corresponding to h 1 (r) is positive definite (Section 6.4 in Ohser and Schladitz, 2009) and, therefore, from Bochner's theorem it follows that there exists a Bartlett spectrum of Ξ. Moreover, the Bartlett spectrum has a density, i.e., the Bessel transform…”

Section: A Geometric Interpretationmentioning

confidence: 99%

Characterization of the Formation of Filter Paper Using the Bartlett Spectrum of the Fiber Structure

et al. 2013

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The formation index of filter paper is one of the most important characteristics used in industrial quality control. Its estimation is often based on subjective comparison chart rating or, more objective, on the power spectrum of the paper structure observed on a transmission light table. It is shown that paper formation can be modeled by means of Gaussian random fields with a well-defined class of correlation functions, and a formation index which is derived from the density of the Bartlett spectrum estimated from image data: the mean of the Bessel transform of the correlation function taken for wave lengths between 2 and 5 mm. Furthermore, it is shown that a considerable variation of the local grammage can be observed also in cases where the the fibers are uniformly and independently scattered in the paper sheet.

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“…This specifically developed method is described in the Results section. To obtain a 3-D visualization, a polygonal surface representation was built with the segmented phases [16].…”

Section: Data Processingmentioning

confidence: 99%

Three-dimensional chemical analysis of laser-welded NiTi–stainless steel wires using a dual-beam FIB

et al. 2013

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The biomedical industry has an increasing demand for processes to join dissimilar metals, such as laser welding of NiTi and stainless steel wires. A region of the weld close to the NiTi interface, which previously was shown to be prone to cracking, was further analyzed by energy dispersive spectrometry (EDS) extended in the third dimension using a focused ion beam. As the spatial resolution of EDS analysis is not precise enough to resolve the finest parts of the microstructure, a new segmentation method that uses in addition secondaryelectron images of higher spatial resolution was developed. Applying these tools, it is shown that this region of the weld close to the NiTi interface does not comprise a homogeneous intermetallic layer, but is rather constituted by a succession of different intermetallics, the composition of which can be directly correlated with the solidification path in the ternary Fe-Ni-Ti Gibbs simplex.

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3D Images of Materials Structures

Cited by 198 publications

References 0 publications

Imaging of Fluorophores in Chromatographic Beads, Reconstruction of Radial Density Distributions and Characterisation of Protein Uptaking Processes

Imaging of Fluorophores in Chromatographic Beads, Reconstruction of Radial Density Distributions and Characterisation of Protein Uptaking Processes

Characterization of the Formation of Filter Paper Using the Bartlett Spectrum of the Fiber Structure

Three-dimensional chemical analysis of laser-welded NiTi–stainless steel wires using a dual-beam FIB

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