processing flow
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2021 ◽  
Author(s):  
Saikat Saha ◽  
Francis Pagaud ◽  
Bernard P. Binks ◽  
Valeria Garbin

Oil foams stabilized by crystallizing agents exhibit outstanding stability and show promise for applications in consumer products. The stability and mechanics imparted by the interfacial layer of crystals underpin product shelf-life, as well as optimal processing conditions and performance in applications. Shelf-life is affected by the stability against bubble dissolution over a long time scale, which leads to slow compression of the interfacial layer. In processing flow conditions, the imposed deformation is characterized by much shorter time scales. In practical situations, the crystal layer is therefore subjected to deformation on extremely different time scales. Despite its importance, our understanding of the behavior of such interfacial layers at different time scales remains limited. To address this gap, here we investigate the dynamics of single, crystal-coated bubbles isolated from an oleofoam, at two extreme timescales: the diffusion-limited timescale characteristic of bubble dissolution 10,000 s, and a fast time scale characteristic of processing flow conditions, 0.001 s. In our experiments, slow deformation is obtained by bubble dissolution, and fast deformation in controlled conditions with real-time imaging is obtained using ultrasound-induced bubble oscillations. The experiments reveal that the fate of the interfacial layer is dramatically affected by the dynamics of deformation: after complete bubble dissolution, a continuous solid layer remains; while after fast, oscillatory deformation of the layer, small crystals are expelled from the layer. This observation shows promise towards developing stimuli-responsive systems, with sensitivity to deformation rate, in addition to the already known thermo- and photo-responsiveness of oleofoams.


2021 ◽  
pp. 69-84
Author(s):  
A. V. Novokreschin ◽  
D. S. Rakivnenko ◽  
Y. A. Ignatieva ◽  
I. V. Musatov ◽  
I. I. Karimov

Seismic data processing from a floating datum is accompanied by difficulties in estimating effective velocities. These difficulties are associated with the roughness of the datum surface, which, if ignored, leads to artifacts in the estimated effective velocities. The study presents the results of a quantitative analysis of the distortion of effective velocities with model data, as well as the technique to minimize the distorting effect of the elevation on effective velocities. The essence of the method is bringing the sources and receivers within one CDP to a local constant level. This approach has been tested on modeled and real data. It showed a significant reduction in the effect of floating level roughness on kinematic parameters. At the same time, there is no need to modify the processing flow whatsoever.


Oceanography ◽  
2021 ◽  
Vol 34 (2) ◽  
Author(s):  
Abigail Benson ◽  
◽  
Tylar Murray ◽  
Gabrielle Canonico ◽  
Enrique Montes ◽  
...  

Assessing the current state of and predicting change in the ocean’s biological and ecosystem resources requires observations and research to safeguard these valuable public assets. The Marine Biodiversity Observation Network (MBON) partnered with the Global Ocean Observing System Biology and Ecosystems Panel and the Ocean Biodiversity Information System to address these needs through collaboration, data standardization, and data sharing. Here, we describe the generalized MBON data processing flow, which includes several steps to ensure that data are findable, accessible, interoperable, and reusable. By following this flow, data collected and managed by MBON have contributed to our understanding of the Global Ocean Observing System Essential Ocean Variables and demonstrated the value of web-based, interactive tools to explore and better understand environmental change. Although the MBON’s generalized data processing flow is already in practice, work remains in building ontologies for biological concepts, improving processing scripts for data standardization, and speeding up the data collection-to-sharing timeframe.


2021 ◽  
Author(s):  
Yuanhao Wang ◽  
Bin Deng ◽  
Qi Yang ◽  
Hongqiang Wang ◽  
Yang Zeng

2020 ◽  
Vol 31 (3) ◽  
pp. 565-579
Author(s):  
Shungeng Zhang ◽  
Qingyang Wang ◽  
Yasuhiko Kanemasa ◽  
Huasong Shan ◽  
Liting Hu

Geophysics ◽  
2020 ◽  
Vol 85 (2) ◽  
pp. U47-U53 ◽  
Author(s):  
Luiz Alberto Santos ◽  
Eloise Helena Policarpo Neves ◽  
Antônio Fernando Menezes Freire ◽  
Marco Antônio Cetale Santos ◽  
Ryo Matsumoto ◽  
...  

Historically, marine research has been using single-channel seismic (SCS) devices for scientific projects. Despite SCS’s abundant data availability and the contribution it has brought for subsurface comprehension, few efforts have been dedicated to improve the SCS processing flow to extract more information carried by seismic signals and for better imaging. Diffractions present the necessary means to estimate sediment acoustic properties useful for imaging, stability studies, and geohazard prevention. The root-mean-square (rms) velocity is estimated from diffractions using a diffraction velocity analysis workflow composed of the following main steps: separation of diffractions from specular events using stationary phase properties and plane-wave destruction filtering, determination of diffractor locations in time, velocity scanning using constant rms velocity time migration, automatic picking of rms velocity at the diffractor location in the scan volume, and quality control to avoid spurious rms velocity. The method circumvents the sparsity and nonuniform distribution of diffractions for smooth lateral velocity change conditions. Application in a SCS line acquired in the Joetsu Basin, Japan Sea, indicates improvement in the focusing of deeper events compared to the previous processing flow, and it adds consistent information about the acoustic properties of the subsurface.


IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 4255-4264
Author(s):  
Tao Yang ◽  
Yibo Hu ◽  
Yang Li ◽  
Wei Hu ◽  
Quan Pan

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