Three-dimensional digital holographic aperture synthesis for rapid and highly-accurate large-volume metrology

2015 ◽  
Author(s):  
Stephen Crouch ◽  
Brant M. Kaylor ◽  
Zeb W. Barber ◽  
Randy R. Reibel
Keyword(s):  
Large Volume ◽  
Three Dimensional ◽  
Aperture Synthesis

scholarly journals Magnetic Field Structure of Star Forming Regions: VLBI Spectral Line Results

1984 ◽  
Vol 110 ◽  
pp. 333-334
Author(s):  
J.A. Garcia-Barreto ◽  
B. F. Burke ◽  
M. J. Reid ◽  
J. M. Moran ◽  
A. D. Haschick
Keyword(s):  
Magnetic Field ◽  
Three Dimensional ◽  
Aperture Synthesis ◽  
Stokes Parameters ◽  
Hii Region ◽  
Star Forming ◽  
Star Forming Regions ◽  
Vlbi Observations ◽  
The Magnetic Field ◽  
Synthesis Experiment

Magnetic fields play a major role in the general dynamics of astronomical phenomena and particularly in the process of star formation. The magnetic field strength in galactic molecular clouds is of the order of few tens of μG. On a smaller scale, OH masers exhibit fields of the order of mG and these can probably be taken as representative of the magnetic field in the dense regions surrounding protostars. The OH molecule has been shown to emit highly circular and linearly polarized radiation. That it was indeed the action of the magnetic field that would give rise to the highly polarized spectrum of OH has been shown by the VLBI observations of Zeeman pairs of the 1720 and 6035 MHz by Lo et. al. and Moran et. al. VLBI observations of W3 (OH) revealed that the OH emission was coming from numerous discrete locations and that all spots fell within the continuum contours of the compact HII region. The most detailed VLBI aperture synthesis experiment of the 1665 MHz emission from W3 (OH) was carried out by Reid et. al. who found several Zeeman pairs and a characteristic maser clump size of 30 mas. In this work, we report the results of a 5 station VLBI aperture synthesis experiment of the 1665 MHz OH emission from W3 (OH) with full polarization information. We produced VLBI synthesis maps of all Stokes parameters of 16 spectral features that showed elliptical polarization. The magnitude and direction of the magnetic field have been obtained by the detection of 7 Zeeman pairs. The three dimensional orientation of the magnetic field can be obtained, following the theoretical arguments of Goldreich et. al., from the observation of π and σ components.

Three-Dimensional Cell Printing of Large-Volume Tissues: Application to Ear Regeneration

2017 ◽  
Vol 23 (3) ◽  
pp. 136-145 ◽  
Author(s):  
Jung-Seob Lee ◽  
Byoung Soo Kim ◽  
Donghwan Seo ◽  
Jeong Hun Park ◽  
Dong-Woo Cho
Keyword(s):  
Large Volume ◽  
Three Dimensional ◽  
Cell Printing ◽  
Dimensional Cell

scholarly journals Three dimensional digital holographic aperture synthesis

2015 ◽  
Vol 23 (18) ◽  
pp. 23811 ◽  
Author(s):  
Stephen Crouch ◽  
Brant M. Kaylor ◽  
Zeb W. Barber ◽  
Randy R. Reibel
Keyword(s):  
Three Dimensional ◽  
Aperture Synthesis

scholarly journals Plastic embedding immunolabeled large-volume samples for three-dimensional high-resolution imaging

2017 ◽  
Vol 8 (8) ◽  
pp. 3583 ◽  
Author(s):  
Yadong Gang ◽  
Xiuli Liu ◽  
Xiaojun Wang ◽  
Qi Zhang ◽  
Hongfu Zhou ◽  
...  
Keyword(s):  
High Resolution ◽  
Large Volume ◽  
Three Dimensional ◽  
High Resolution Imaging ◽  
Plastic Embedding ◽  
Resolution Imaging

An internal magnetic field strategy to reuse pulverized active materials for high performance: a magnetic three-dimensional ordered macroporous TiO2/CoPt/α-Fe2O3 nanocomposite anode

2017 ◽  
Vol 53 (38) ◽  
pp. 5298-5301 ◽  
Author(s):  
Yiping Tang ◽  
Liang Hong ◽  
Jiquan Li ◽  
Guangya Hou ◽  
Huazhen Cao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Large Volume ◽  
High Performance ◽  
Three Dimensional ◽  
Reversible Capacity ◽  
Cyclic Stability ◽  
Active Materials ◽  
High Reversible Capacity ◽  
Ordered Macroporous ◽  
Large Volume Change

An internally magnetic field was established by CoPt for attracting pulverized ferromagnetic α-Fe2O3. Combining with the unique porous structure for accommodating large volume change, the TiO2/CoPt/α-Fe2O3 (3DOMTCF) anode demonstrated high reversible capacity and extremely promising cyclic stability.

scholarly journals Stitching of 3D ultrasound datasets for the determination of large thyroid volumes – phantom study part II: mechanically-swept probes

2019 ◽  
Vol 21 (4) ◽  
pp. 389
Author(s):  
Philipp Seifert ◽  
Thomas Winkens ◽  
Leonard Knichel ◽  
Chirstian Kühnel ◽  
Martin Freesmeyer
Keyword(s):  
Large Volume ◽  
Three Dimensional ◽  
Correlation Coefficients ◽  
3D Ultrasound ◽  
Field Of View ◽  
Linear Probe ◽  
Extended Field ◽  
Different Shapes ◽  
Extended Field Of View

Aims: To investigate the feasibility and accuracy of 3D-US extended field of view volumetric analyses acquired with mechanically-swept ultrasound probes with different measurement methods for large volume thyroid phantoms.Materials and methods: Fifteen thyroid phantoms with different shapes (regular, nodular, thickened isthmus) and volumes (50-400 mL) were created. Two different mechanically-swept US probes were used for the separate scanning of the left and right lobes: convex and linear probe. After specific modifications, the 3D-US datasets were stitched together to an extended field of view using predefined landmarks. Volumetric analyses were performed by conventional ellipsoid model and manual tracing methods. The correspondence of measured and reference volumes was calculated using Pearson’s correlation coefficients and limits of agreement according to Bland and Altman.Results: The C-probe proved feasible for the acquisition and processing of the three-dimensional ultrasound extended field of view images; very high levels of agreement (correlation coefficients for volume analyses: 0.9843-0.9992) were observed for all shapes and volumes investigated. The manual tracing method showed superior results in comparison to the ellipsoid model, but was more time consuming. The linear probe was only applicable for the 50 mL phantoms due to its limited field of view.Conclusions: The investigated mechanically-swept convex probe was suitable for the three-dimensional ultrasound extended field of view stitching of large volume thyroid phantoms. Accurate volume analyses could be carried out. The mechanically-swept linear probe is limited to a maximum of 50 m

Experience of using three-dimensional inversion for the large volume of magnetotelluric data

2019 ◽  
pp. 84-87
Author(s):  
S. V. Zaytsev
Keyword(s):  
Computer Technology ◽  
Large Volume ◽  
High Performance ◽  
Three Dimensional ◽  
Hydrocarbon Exploration ◽  
Huge Amount ◽  
3D Inversion ◽  
Magnetotelluric Data ◽  
Geophysical Field ◽  
Wide Range

When switching to 3D inversion of MT data, the requirement for computer technology is significantly increased. In this paper we will discuss a few examples of 3D inversion of electromagnetic geophysical field data with the usage of “Lomonosov” supercomputer and show its effectiveness on several geological objects. Each object is associated with a variety of problems: from search for shallow ore to regional hydrocarbon exploration. But all these objects contain a large volume of measurements obtaining qualitative results for which requires a huge amount of time. So that the use of 3D inversion with a high-performance computational complex makes it possible to obtain a qualitative result of solving a wide range of problems.

scholarly journals Enhanced Quantification for 3D Energy Dispersive Spectrometry: Going Beyond the Limitation of Large Volume of X-Ray Emission

2014 ◽  
Vol 20 (5) ◽  
pp. 1544-1555 ◽  
Author(s):  
Pierre Burdet ◽  
Cécile Hébert ◽  
Marco Cantoni
Keyword(s):  
Large Volume ◽  
Energy Dispersive Spectrometry ◽  
Three Dimensional ◽  
Measured Data ◽  
Energy Dispersive ◽  
X Rays ◽  
Voxel Size ◽  
X Ray ◽  
Quantification Method ◽  
Systematic Improvement

AbstractThis paper presents a method developed to quantify three-dimensional energy dispersive spectrometry (3D EDS) data with voxel size smaller than the volume from which X-rays are emitted. The influence of the neighboring voxels is corrected by applying recursively a complex quantification, improving thereby the accuracy of the quantification of critically small features. The enhanced quantification method is applied to simulated and measured data. A systematic improvement is obtained compared with classical quantification, proving the concept and the prospect of this method.

Quantitative evaluation of indentation-induced densification in glass

2005 ◽  
Vol 20 (12) ◽  
pp. 3404-3412 ◽  
Author(s):  
Satoshi Yoshida ◽  
Jean-Christophe Sanglebœuf ◽  
Tanguy Rouxel
Keyword(s):  
Metallic Glass ◽  
Large Volume ◽  
Three Dimensional ◽  
Soda Lime ◽  
Silicate Glasses ◽  
Vickers Indentation ◽  
Compositional Dependence ◽  
Atomic Force ◽  
Volume Recovery ◽  
Before And After

To estimate the ratio of densification to Vickers indentation volume, three-dimensional images of Vickers indentations on several glasses, including silicate glasses and bulk metallic glass (BMG), were obtained before and after annealing using an atomic force microscope. Large volume recovery of Vickers indentation by annealing was observed for all glasses but BMG. Following previous studies, this recovered volume almost corresponded to the densified volume under a Vickers indenter, and the compositional dependence of densification was discussed. The ratios of densification to the total indentation volume for silica and soda-lime glasses were 92% and 61%, respectively. It was concluded that densification was a general property for silicate glasses and that the ratios of densification to the total indentation volume for all the glasses correlated well with Poisson’s ratios of the glasses.

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