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Comparison of Appearance-Based and Geometry-Based Bubble Detectors [chapter]

Nataliya Strokina, Roman Juránek, Tuomas Eerola, Lasse Lensu, Pavel Zemčik, Heikki Kälviäinen
2014 Lecture Notes in Computer Science  
The two common techniques to detect circular objects such as bubbles, the geometry-based and appearance-based approaches, have their advantages and weaknesses.  ...  In this paper, we compare a geometry-based concentric circular arrangements (CCA) and appearance-based sliding window methods as well as their combinations in terms of bubble detection, gas volume computation  ...  There are two common approaches that are used to detect circular objects: geometry-based and appearance-based approaches.  ... 
doi:10.1007/978-3-319-11331-9_73 fatcat:g5fwqjkfb5e43noexkti6um4b4

Modeling, analysis and prediction of neutron emission spectra from acoustic cavitation bubble fusion experiments

R.P. Taleyarkhan, J. Lapinskas, Y. Xu, J.S. Cho, R.C. Block, R.T. Lahey, R.I. Nigmatulin
2008 Nuclear Engineering and Design  
The impact of neutron pulse-pileup during bubble fusion was verified and estimated with pulsed neutron generator based experiments and first-principle calculations.  ...  Self-nucleated and external neutron nucleated acoustic (bubble fusion) cavitation experiments have been modeled and analyzed for neutron spectral characteristics at the detector locations for all separate  ...  Colin West for improving the quality of the manuscript, and which are deeply appreciated and duly acknowledged. Editorial assistance and encouragement from Prof. G.  ... 
doi:10.1016/j.nucengdes.2008.06.007 fatcat:thc3yloj7zctlgrwylrtzgmwea

Tensioned Metastable Fluid Detectors in Nuclear Security for Passively Monitoring of Special Nuclear Materials―Part A

Tom Grimes, Rusi Taleyarkhan
2011 World Journal of Nuclear Science and Technology  
This paper (constituting Part A) describes the transformational Tensioned Metastable Fluid Detector (TMFD) based method for "passive" detection of Special Nuclear Materials (SNMs) as related to nuclear  ...  These techniques will then be discussed and evaluated in the context of area monitoring in waste processing applications with a focus on passive monitoring of radioactive source particles from SNMs.  ...  Additional support was provided by the United States Department of Energy, the Department of Homeland Security, and Purdue University.  ... 
doi:10.4236/wjnst.2011.13010 fatcat:7dytxvlqozdl5g6g7ohm7pyhhu

A physical zero-knowledge object-comparison system for nuclear warhead verification

Sébastien Philippe, Robert J. Goldston, Alexander Glaser, Francesco d'Errico
2016 Nature Communications  
Here we demonstrate a non-electronic fast neutron differential radiography technique using superheated emulsion detectors that can confirm that two objects are identical without revealing their geometry  ...  The possibility of using such proofs to process classified and other sensitive physical data has attracted attention, especially in the field of nuclear arms control.  ...  Neutron counts in the detectors are affected by the geometry and physical properties of the item.  ... 
doi:10.1038/ncomms12890 pmid:27649477 pmcid:PMC5034327 fatcat:ueupneb2qrc5bjenrslnvv6l6q

Development of the High Energy Bremsstrahlung X-Ray Spectrometer by Using (γ, n) Reaction

Shouhei SAKATA, Yasunobu ARIKAWA, Sadaoki KOJIMA, Yuki ABE, Takahiro NAGAI, Hiroaki INOUE, Ryukou KATO, Mitsuo NAKAI, Hiroyuki SHIRAGA, Hiroshi AZECHI
2014 Plasma and Fusion Research  
A (γ,n) reaction based hard X-ray spectrometer with energy range from 4 MeV to 30 MeV has been developed for Fast Ignition related experiments.  ...  The performance was evaluated by using a linear accelerator facility, and the obtained results are in good agreement with Monte-Carlo simulation.  ...  Acknowledgments The authors gratefully acknowledge the support of the GEKKO XII operation group, the LFEX development and operation group, the target fabrication group, and the plasma diagnostics operation  ... 
doi:10.1585/pfr.9.4404112 fatcat:nhlcvhshf5hhveejoxr5xrn5by

Generation and evaluation of an artificial optical signal based on X-ray measurements for bubble characterization in fluidized beds with vertical internals

F. Schillinger, T.J. Schildhauer, S. Maurer, E. Wagner, R.F. Mudde, J.R. van Ommen
2018 International Journal of Multiphase Flow  
Generation and evaluation of an artificial optical signal based on X-ray measurements for bubble characterization in fluidized beds with vertical internals Schillinger, F.; Schildhauer, TJ; Maurer, S.;  ...  Acknowledgment This research project is financially supported by the Swiss Innovation Agency lnnosuisse and is part of the Swiss Competence Center for Energy Research SCCER BIOSWEET.  ...  Comparison of bubble rise velocity between optical and X-ray evaluation method If the shape of a bubble does not change between the lower and upper detector array, it is expected that both the X-ray evaluation  ... 
doi:10.1016/j.ijmultiphaseflow.2018.03.002 fatcat:uywqx3maj5e5bn57ptplcpulda

3D Object Representations for Fine-Grained Categorization

Jonathan Krause, Michael Stark, Jia Deng, Li Fei-Fei
2013 2013 IEEE International Conference on Computer Vision Workshops  
In this paper, we therefore lift two state-of-the-art 2D object representations to 3D, on the level of both local feature appearance and location.  ...  their efficacy for estimating 3D geometry from images via ultrawide baseline matching and 3D reconstruction.  ...  Both are based on estimating the 3D geometry of an object under consideration (Sect. 3.2), and represent both the appearance of individual local features (Sect. 3.3) and their locations (Sect. 3.4) in  ... 
doi:10.1109/iccvw.2013.77 dblp:conf/iccvw/Krause0DF13 fatcat:ybpy5geivnbnrhxyq43xw45f2e

Page 256 of SPE Production & Operations Vol. 4, Issue 3 [page]

1989 SPE Production & Operations  
The texture plots appeared finer than they should because partial blockage of the detector cell usually occurred early in counting these samples.  ...  Static drain times are often used as a measure of foam performance, even though static properties may have little to do with end use of the foam—i.e., creation of fracture geometry and transport of prop  ... 

Gaussian and non-Gaussian speckle fluctuations in the diffusing-wave spectroscopy signal of a coarsening foam

Alex S. Gittings, Douglas J. Durian
2006 Applied Optics  
However, we find that the Gaussian character breaks down for point-in / point-out backscattering geometries in which the illumination spot size is not sufficiently large in comparison with the size of  ...  We find that the electric field is Gaussian for typical experimental geometries equivalent to illumination and detection with a plane wave, both for backscattering and transmission through an optically-thick  ...  Their structure is meta-stable, constantly evolving by gas diffusion, bubble rearrangement, drainage, and bubble rupture.  ... 
doi:10.1364/ao.45.002199 pmid:16607984 fatcat:vndtkbkqdfhyzmswgsgk2dyxqa

Time-resolved fast-neutron radiography of air-water two-phase flows in a rectangular channel by an improved detection system

Robert Zboray, Volker Dangendorf, Ilan Mor, Benjamin Bromberger, Kai Tittelmeier
2015 Review of Scientific Instruments  
The enhanced imaging quality enables an improved prediction of two-phase flow parameters like the instantaneous volumetric gas fraction, bubble size, and bubble velocities.  ...  Using the tailored detector and the improved post-processing, significant increase in the image quality and an order of magnitude lower exposure times, down to 3.33 ms, have been achieved with minimized  ...  Note that the bubble size and the CM velocity are only taken for bubbles appearing fully inside the FOV.  ... 
doi:10.1063/1.4926999 pmid:26233413 fatcat:76o6dpb5xzbe3me4tq6p4pkae4

Nuclear Fusion in Collapsing Bubbles—Is It There? An Attempt to Repeat the Observation of Nuclear Emissions from Sonoluminescence

D. Shapira, M. Saltmarsh
2002 Physical Review Letters  
Using the same cavitation apparatus, a more sophisticated data acquisition system, and a larger scintillator detector, we find no evidence for 2.5-MeV neutron emission correlated with sonoluminescence  ...  form collapsing bubbles.  ...  We also note the intriguing time dependence seen in the SL detector. We thank R. Varner for help in setting up the data acquisition system, and J. D. Fox and L. Berry for help with the manuscript.  ... 
doi:10.1103/physrevlett.89.104302 pmid:12225196 fatcat:wvfbqtqdfbbnxkxnzefpbzvcqi

Development and validation of an automated algorithm to evaluate the abundance of bubbles in small bowel capsule endoscopy

Olivia Pietri, Gada Rezgui, Aymeric Histace, Marine Camus, Isabelle Nion-Larmurier, Cynthia Li, Aymeric Becq, Einas Ali, Olivier Romain, Ulriikka Chaput, Philippe Marteau, Christian Florent (+1 others)
2018 Endoscopy International Open  
Conclusion A computed algorithm based on a GLCM detector strategy had high diagnostic performance allowing assessment of the abundance of bubbles in SB-CE still frames.  ...  This algorithm could be of interest for clinical use (quality reporting) and for research purposes (objective comparison tool of different preparations).  ...  Discussion We selected and validated a computed and comprehensive algorithm, allowing evaluation of the abundance of bubbles in SB-CE still frames, based on GLCM detector strategy.  ... 
doi:10.1055/a-0573-1044 pmid:29616238 pmcid:PMC5880035 fatcat:cbh5sn7i7vdzhm3efqm4zeff6e

Characterization of 30 ^76Ge enriched Broad Energy Ge detectors for GERDA Phase II [article]

GERDA collaboration, M. Agostini, A.M. Bakalyarov, E. Andreotti, M. Balata, I. Barabanov, L. Baudis, N. Barros, C. Bauer, E. Bellotti, S. Belogurov, G. Benato (+99 others)
2019 arXiv   pre-print
This paper describes the properties and the overall performance of these detectors during operation in vacuum.  ...  strength of pulse shape simulation codes.  ...  In most of these cases a single 'bubble' was observed, in two detectors even two independent 'bubbles' for the first time. The 'bubbles' appear only at well-defined high voltages.  ... 
arXiv:1901.06590v1 fatcat:faciv44vjjbiffdoqnetr6sj2y

A Concept for a Scalable 2 kTon Liquid Argon TPC Detector for Astroparticle Physics [article]

D.B. Cline, F. Sergiampietri
2005 arXiv   pre-print
This paper describes the results of a study on the general lines, main construction criteria, crucial points, parameters and required preliminary R&D activities for the construction of a LAr (liquid argon  ...  Such detectors are crucial for supernova detection, proton decay, LBL neutrino physics and other astroparticle physics applications.  ...  If, from one side the spherical shape requires half of the wall stiffness in comparison with the cylindrical one, the latter appears more suitable for the TPC drift geometry and with a more advantageous  ... 
arXiv:astro-ph/0509410v1 fatcat:62dx5djwwrhs7pmfl4ae3z3y3q

Fluidization dynamics of cohesive Geldart B particles. Part I: X-ray tomography analysis

Jiliang Ma, J. Ruud van Ommen, Daoyin Liu, Robert F. Mudde, Xiaoping Chen, Evert C. Wagner, Cai Liang
2019 Chemical Engineering Journal  
X-ray tomography was used to reconstruct 3D bubbles in a bubbling bed. • The inter-particle cohesive force facilitates the coalescence of bubbles in the bed. • The fluidization fails as the whole bed slugging  ...  Acknowledgements This work is supported by National Key R&D Program of China (2017YFB0603300) and National Nature Science Foundation of China (51806036 and 51676042).  ...  Both normal bubbles and gas slugs determined the bubble hold-up. At 30 °C, no slugging appears.  ... 
doi:10.1016/j.cej.2018.11.082 fatcat:nkui7wpppvfyzes6563p2jb2ue
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