Trap mechanism of micro bubble in micro concave patterns

Water Treatment using Discharge Generated in Cavitation Field with Micro Bubble Cloud

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.132.656 ◽

2012 ◽

Vol 132 (8) ◽

pp. 656-663 ◽

Cited By ~ 2

Author(s):

Satoshi Ihara ◽

Taiki Hirohata ◽

Yuichi Kominato ◽

Chobei Yamabe ◽

Hideaki Ike ◽

...

Keyword(s):

Water Treatment ◽

Bubble Cloud ◽

Cavitation Field ◽

Micro Bubble

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High Reynolds Number Micro-Bubble and Polymer Drag Reduction Experiments

10.21236/ada476433 ◽

2008 ◽

Author(s):

Steven L. Ceccio ◽

David R. Dowling ◽

Marc Perlin ◽

Michael Solomon

Keyword(s):

Reynolds Number ◽

Drag Reduction ◽

High Reynolds Number ◽

Polymer Drag Reduction ◽

Micro Bubble ◽

High Reynolds

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Utility of transcranial color flow imaging for detecting high risk morphology of patent foramen ovale in patients with cerebral infarction

European Heart Journal ◽

10.1093/ehjci/ehaa946.2443 ◽

2020 ◽

Vol 41 (Supplement_2) ◽

Author(s):

S Chino ◽

Y Mochizuki ◽

E Toyosaki ◽

M Ota ◽

K Mizuma ◽

...

Keyword(s):

High Risk ◽

Patent Foramen Ovale ◽

Cerebral Embolism ◽

Flow Imaging ◽

Foramen Ovale ◽

Color Flow ◽

Color Flow Imaging ◽

Bubble Test ◽

Micro Bubble ◽

Group B

Abstract Background Micro-bubble test by using transcranial color flow imaging (TCCFI) is important as a screening evaluation for diagnosis of paradoxical cerebral embolism which requires the proof of right to left shunt at atrial septum. In addition, high risk features of patent foramen ovale (PFO) that may allow thrombus to easily pass through the PFO itself were previously reported. However, little is known about the association between the degrees on micro-bubble test by TCCFI and the features of high risk PFO. Purpose Our aim is to clarify the relationship between the degree of micro-bubble test in TCCFI and the morphology of PFO from transesophageal echocardiography (TEE). Methods Seventy-seven patients in whom cardiogenic embolism was strongly suspected by neurologists in Showa University from April to December in 2019 were retrospectively studied. 55 patients underwent both TCCFI and TEE with sufficient Valsalva stress. TCCFI grade of micro-bubble test was classified into 3 groups (A: none, B: small, and C: massive), in which signified “none” is no sign of micro-embolic signals (MES) within 30 seconds, “small” is 1 or more MES, and “massive” is so much MES look like a curtain (Figure). Evaluated high risk characteristics of PFO for cerebral embolism as previously reported were as follows; (1) tunnel height, (2) tunnel length, (3) total excursion distance into right and left atrium, (4) existence of Eustachian valve or Chiari network, (6) angle of PFO from inferior vena cava (7) large shunt (20 or more micro-bubbles). Results Of all TCCFI-positive patients (n=32; Group B=19, Group C=13) with cerebral embolism, PFOs were detected in 23 patients in TEE. Therefore, the sensitivity and specificity of TCCFI to PFO were 87% and 63% (AUC=0.75, p<0.001, respectively). Interestingly, all 13 patients (Group C) had manifest PFOs. Moreover, group C include 2 patients with platypnea orthodeoxia syndrome in which hypoxia in the sitting position becomes apparent. Among PFO-positive patients, tunnel height, length, total excursion distance into right and left atrium, and large shunt in TEE were significantly larger in Group C than Group B (p<0.05). Conclusions Micro-bubble test by using TCCFI may have screening advantages in predicting paradoxical cerebral embolism, high-risk morphology of PFO, and platypnea orthodeoxia syndrome. Figure 1 Funding Acknowledgement Type of funding source: None

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Hydrodynamics and Mixer-Induced Bubble Formation in Micro Bubble Columns with Single and Multiple-Channels

Chemical Engineering & Technology ◽

10.1002/ceat.200600180 ◽

2006 ◽

Vol 29 (9) ◽

pp. 1015-1026 ◽

Cited By ~ 71

Author(s):

V. Haverkamp ◽

V. Hessel ◽

H. Löwe ◽

G. Menges ◽

M. J. F. Warnier ◽

...

Keyword(s):

Bubble Formation ◽

Bubble Columns ◽

Multiple Channels ◽

Micro Bubble

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Kerr parametric oscillations and frequency comb generation from dispersion compensated silica micro-bubble resonators

Optics Express ◽

10.1364/oe.21.016908 ◽

2013 ◽

Vol 21 (14) ◽

pp. 16908 ◽

Cited By ~ 52

Author(s):

Ming Li ◽

Xiang Wu ◽

Liying Liu ◽

Lei Xu

Keyword(s):

Frequency Comb ◽

Micro Bubble ◽

Parametric Oscillations ◽

Comb Generation

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MEMS Challenge: Can This Technology Catch the Internet Lightwave?

10.1115/imece2000-1154 ◽

2000 ◽

Author(s):

Ken Gilleo

Keyword(s):

Optical Switch ◽

The Internet ◽

Underwater Communications ◽

Optical Mems ◽

Phone Calls ◽

Micro Bubble ◽

Mechanical Devices ◽

Final Answer ◽

The Right ◽

The Ideal

Abstract The pundits of the money world tell us to be a “dotcom” or enable them for excitement and rewards. Traffic on the Internet Highway is certainly stepping up the pace as “slow” electrons make way for ultimate-speed photons creating major hardware opportunities. The “Copper Road” has become the “Glass Super Highway” as long-haul terrestrial and underwater communications links move up to Advanced Photonics. Nothing can be faster than light, but more important, no other medium can offer wider bandwidth when wave-multiplexing strategies are used. Photonics, employing dense wave division multiplexing (DWDM) can carry the equivalent of 12,000 encyclopedias or 5-million phone calls on a single fiber. Recent advances in photonics hardware, including higher-powered lasers, more efficient amplifiers and cleaner optical fiber are enabling incredible bandwidth for the Internet and general communications services. But how do we route a light beam? The long-haul segments of the Internet, now mostly fiberoptics, have been converting modulated light to electronic signals, routing with conventional electronic hardware and then re-converting back to light. Yes, O-E-O (Opto-electro-opto) works, but with cost and time-delay penalties. The communications industry has decreed that the double conversion process must go, but what technology will be the replacement? Enter optical MEMS, or MOEMS (micro-opto-electro-mechanical systems). The MOEMS switch/router approach was endorsed by the Internet carrier and hardware industry that paid billions of dollars in 2000 to acquire MEMS companies, some that had not even shipped a product. But what are the issues and are there competing technologies that could win? Micro-mirror technology is at the top of the popularity chart right now. Can MOEMS mirror routers solve cost problems and can they even switch at the rates demanded. What is the ideal mirror switch strategy: binary “off/on” or point-to-light pipe arrays? What about other MEMS approaches such as micro-bubble fluid beam refraction that appears to offer a much simpler construction? Maybe the mechanical devices are only an interim destined to obsolescence by a future solid state optics switch. The optical switch, powered totally by photons, is already in the lab and could be the final answer. This paper will survey MOEMS inside the Internet to seek answers to the billion dollar questions. The focus will be on micro-mirrors and their packaging issues both inside and out. We will deal with selecting the ideal optical MEMS package and choosing the right atmosphere control. Certain in-package contaminants are death to mirrors, but they can be controlled even if generated after the package is sealed. So tune in to find out if MEMS can catch the WAVE!

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