TWO-DIMENSIONAL STATIC AND DYNAMIC DISPLAY SYSTEM OF BOWEL SOUND MAGNITUDE MAP FOR EVALUATION OF INTESTINAL MOTILITY

<div>Shear-assisted liquid exfoliation is a primary candidate for producing defect-free two-dimensional materials from labs to industry. Diverse hydrodynamic conditions exist across production methods, and combined with low-throughput, high-cost characterization techniques, strongly contribute to the wide variability in performance and material quality. Through investigations on strikingly different flow regimes, and using graphene as the prototypical two-dimensional material, we find that scaling of production depends on local stress fi eld distributions and precursor residence time. We report a novel indirect diffuse reflectance method to measure graphene concentration in real-time, using low-cost optoelectronics and without the need to remove the precursor material from the heterogeneous dispersions. We show that this high-throughput, <i>in situ</i> approach has broad applicability by controlling the number of atomic layers on the fly, rapidly optimising green solvent design for maximum yield, and viewing live production rates. Combining insights on the hydrodynamics of exfoliation with this scalable monitoring technique, targeted process intensi fication, quality control, batch traceability and individually customisable materials on-demand are possible.</div>

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NanoParticle Tracking Analysis; The Halo System

MRS Proceedings ◽

10.1557/proc-0952-f02-04 ◽

2006 ◽

Vol 952 ◽

Cited By ~ 1

Author(s):

Andrew Malloy ◽

Patrick Hole ◽

Bob Carr

Keyword(s):

Laser Beam ◽

Real Time ◽

Software Package ◽

Low Cost ◽

Optical Element ◽

Optical Microscope ◽

New Technique ◽

Nanoparticle Tracking Analysis ◽

Nanoscale Particles ◽

A New Technique

ABSTRACTA new technique for nanoparticle sizing that allows visualisation of nanoscale particles in liquids on an individual basis is described. The technology comprises a metallised optical element illuminated by laser beam at the surface of which nanoscale particles in suspension can be directly visualised, sized and counted in real time using only a conventional optical microscope fitted with a low cost camera and a dedicated analytical software package.

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Visual Control System of a Spraying Robot forHyphantria cuneaLarva Nets

Journal of Robotics ◽

10.1155/2015/436490 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7

Author(s):

Ying Zhao ◽

Qun Sun ◽

Chong Wang ◽

Cuihua Zhang

Keyword(s):

Control System ◽

Real Time ◽

Identification Algorithm ◽

Two Dimensional ◽

Simulation Environment ◽

Hyphantria Cunea ◽

Robot System ◽

Border Area ◽

Before And After ◽

Hand Eye Coordination

In order to implement automatic spraying onHyphantria cunealarva nets, a spraying robot system with monocular hand-eye coordination and smart targeting abilities was designed according to the target net features. The system realized spatial two-dimensional motions driven by step motors on linear guide rails. Images were processed in real-time to extract the net curtain targets defined using the border area, and the optimal spraying position was then determined. An identification algorithm based on the global net image to distinguish targets before and after spray was proposed. A simulation environment was designed to verify the correctness of this method. Results showed that the highest rate of over spray is 288.5%, and the spray miss rate is 0.

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Quantifying Optically Derived Two-Dimensional Wave-Averaged Currents in the Surf Zone

Remote Sensing ◽

10.3390/rs13040690 ◽

2021 ◽

Vol 13 (4) ◽

pp. 690

Author(s):

Dylan Anderson ◽

A. Spicer Bak ◽

Katherine L. Brodie ◽

Nicholas Cohn ◽

Rob A. Holman ◽

...

Keyword(s):

Surf Zone ◽

Spatial Scales ◽

Low Cost ◽

Breaking Waves ◽

Two Dimensional ◽

Rip Currents ◽

Circulation Patterns ◽

Passive Tracers ◽

A New Technique ◽

Incident Waves

Complex two-dimensional nearshore current patterns are generated by feedbacks between sub-aqueous morphology and momentum imparted on the water column by breaking waves, winds, and tides. These non-stationary features, such as rip currents and circulation cells, respond to changing environmental conditions and underlying morphology. However, using fixed instruments to observe nearshore currents is limiting due to the high costs and logistics necessary to achieve adequate spatial sampling resolution. A new technique for processing surf-zone imagery, WAMFlow, quantifies fluid velocities to reveal complex, multi-scale (10 s–1000 s meters) nearshore surface circulation patterns. We apply the concept of a wave-averaged movie (WAM) to measure surf-zone circulation patterns on spatial scales of kilometers in the alongshore and 100 s of meters in the cross-shore. The approach uses a rolling average of 2 Hz optical imagery, removing the dominant optical clutter of incident waves, to leave the residual foam or water turbidity features carried by the flow. These residual features are tracked as quasi-passive tracers in space and time using optical flow, which solves for u and v as a function of image intensity gradients in x, y, and t. Surf zone drifters were deployed over multiple days with varying nearshore circulations to validate the optically derived flow patterns. Root mean square error are reduced to 0.1 m per second after filtering based on image attributes. The optically derived patterns captured longshore currents, rip currents, and gyres within the surf zone. Quantifying nearshore circulation patterns using low-cost image platforms and open-source computer vision algorithms presents the potential to further our understanding of fundamental surf zone dynamics.

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Universal Scaling and Real-Time Monitoring of the Production of Liquid Exfoliated Graphene

10.26434/chemrxiv.11628267.v1 ◽

2020 ◽

Author(s):

Jason Stafford ◽

Nwachukwu Uzo ◽

Usmaan Farooq ◽

Silvia Favero ◽

Si Wang ◽

...

Keyword(s):

Real Time ◽

Low Cost ◽

Maximum Yield ◽

Local Stress ◽

Two Dimensional ◽

Exfoliated Graphene ◽

Precursor Material ◽

Solvent Design ◽

Wide Variability ◽

Scalable Monitoring

<div>Shear-assisted liquid exfoliation is a primary candidate for producing defect-free two-dimensional materials from labs to industry. Diverse hydrodynamic conditions exist across production methods, and combined with low-throughput, high-cost characterization techniques, strongly contribute to the wide variability in performance and material quality. Through investigations on strikingly different flow regimes, and using graphene as the prototypical two-dimensional material, we find that scaling of production depends on local stress fi eld distributions and precursor residence time. We report a novel indirect diffuse reflectance method to measure graphene concentration in real-time, using low-cost optoelectronics and without the need to remove the precursor material from the heterogeneous dispersions. We show that this high-throughput, <i>in situ</i> approach has broad applicability by controlling the number of atomic layers on the fly, rapidly optimising green solvent design for maximum yield, and viewing live production rates. Combining insights on the hydrodynamics of exfoliation with this scalable monitoring technique, targeted process intensi fication, quality control, batch traceability and individually customisable materials on-demand are possible.</div>

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Techniques for assessing the performance of circuit materials at microwave and millimetre-wave frequencies

MRS Proceedings ◽

10.1557/proc-783-b1.7 ◽

2003 ◽

Vol 783 ◽

Author(s):

Charles E Free

Keyword(s):

Loss Tangent ◽

Good Accuracy ◽

Low Cost ◽

Resonant Cavity ◽

New Technique ◽

Millimetre Wave ◽

A New Technique

This paper discusses the techniques that are available for characterising circuit materials at microwave and millimetre wave frequencies. In particular, the paper focuses on a new technique for measuring the loss tangent of substrates at mm-wave frequencies using a circular resonant cavity. The benefits of the new technique are that it is simple, low cost, capable of good accuracy and has the potential to work at high mm-wave frequencies.

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Ti3C2-MXene/Bismuth Ferrite Nanohybrids for Efficient Degradation of Organic Dye and Colorless Pollutant

10.26434/chemrxiv.8192375.v1 ◽

2019 ◽

Author(s):

Ayesha Tariq ◽

M. Abdullah Iqbal ◽

S. Irfan Ali ◽

Muhammad Z. Iqbal ◽

Deji Akinwande ◽

...

Keyword(s):

Surface Area ◽

Low Cost ◽

Bismuth Ferrite ◽

Organic Dye ◽

Two Dimensional ◽

Electron Hole ◽

Photocatalytic Application ◽

Electron Hole Pair ◽

Pair Generation ◽

Photocatalytic Applications

<p>Nanohybrids, made up of Bismuth ferrites/Carbon allotropes, are extensively used in photocatalytic applications nowadays. Our work proposes a nanohybrid system composed of Bismuth ferrite nanoparticles with two-dimensional (2D) MXene sheets namely, the BiFeO<sub>3</sub> (BFO)/Ti<sub>3</sub>C<sub>2</sub> (MXene) nanohybrid for enhanced photocatalytic activity. We have fabricated the BFO/MXene nanohybrid using simple and low cost double solvent solvothermal method. The SEM and TEM images show that the BFO nanoparticles were attached onto the MXene surface and in the inter-layers of two-dimensional (2D) MXene sheets. The photocatalytic application is tested for the visible light irradiation which showed the highest efficiency among all pure-BFO based photocatalysts, i.e. 100% degradation in 42 min for organic dye (Congo Red) and colorless aqueous pollutant (acetophenone) in 150 min, respectively. The present BFO-based hybrid system exhibited the large surface area of 147 m<sup>2</sup>g<sup>-1</sup>measured via Brunauer-Emmett-Teller (BET) sorption-desorption technique, and is found to be largest among BFO and its derivatives. Also, the photoluminescence (PL) spectra indicate large electron-hole pair generation. Fast and efficient degradation of organic molecules is supported by both factors; larger surface area and lower electron-hole recombination rate. The BFO/MXene nanohybrid presented here is a highly efficient photocatalyst compared to other nanostructures based on pure BiFeO<sub>3</sub> which makes it a promising candidate for many future applications.</p>

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LOW COST REAL TIME ROCKET TELEMETRY SYSTEM DESIGN

10.26678/abcm.cobem2019.cob2019-1585 ◽

2019 ◽

Author(s):

Gabriel de Almeida Souza ◽

Larissa Barbosa ◽

Glênio Ramalho ◽

Alexandre Zuquete Guarato

Keyword(s):

System Design ◽

Real Time ◽

Low Cost ◽

Telemetry System

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Two-Dimensional Local Deep-Level Transient Spectroscopy Imaging Using Super-Higher-Order Scanning Nonlinear Dielectric Microscopy

ISTFA 2016: Conference Proceedings from the 42nd International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2016p0441 ◽

2016 ◽

Author(s):

N. Chinone ◽

Y. Cho ◽

R. Kosugi ◽

Y. Tanaka ◽

S. Harada ◽

...

Keyword(s):

Deep Level Transient Spectroscopy ◽

Deep Level ◽

Higher Order ◽

Trap Density ◽

New Technique ◽

Two Dimensional ◽

Nonlinear Dielectric ◽

Annealing Conditions ◽

Transient Spectroscopy ◽

A New Technique

Abstract A new technique for local deep level transient spectroscopy (DLTS) imaging using super-higher-order scanning nonlinear dielectric microscopy is proposed. Using this technique. SiCVSiC structure samples with different post oxidation annealing conditions were measured. We observed that the local DLTS signal decreases with post oxidation annealing (POA), which agrees with the well-known phenomena that POA reduces trap density. Furthermore, obtained local DLTS images had dark and bright areas, which is considered to show the trap distribution at/near SiCVSiC interface.

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