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Measurement of surface tension and contact angle using entropic edge detection

C Atae-Allah, M Cabrerizo-Vílchez, J F Gómez-Lopera, J A Holgado-Terriza, R Román-Roldán, P L Luque-Escamilla
2001 Measurement science and technology  
The measurement procedure comprises three steps: acquisition of the liquid drop image, image segmentation to obtain the contour of the drop and surface-tension and contact-angle calculation by the ADSA  ...  In the second step a new segmentation method is used based on the Jensen-Shannon divergence, an entropic measurement of coherence among distribution probabilities.  ...  Acknowledgments This work has been partially supported by grants MAR-97-0464 and MAT-98-0937-C02-C01 of the Spanish Government. Our thanks to Christine Laurin for revising the English.  ... 
doi:10.1088/0957-0233/12/3/307 fatcat:grhmb764brdunkcqeatufeieku

Improvement of interfacial tension measurement using a captive bubble in conjunction with axisymmetric drop shape analysis (ADSA)

Y.Y. Zuo, M. Ding, A. Bateni, M. Hoorfar, A.W. Neumann
2004 Colloids and Surfaces A: Physicochemical and Engineering Aspects  
Axisymmetric drop shape analysis (ADSA) is a method to measure surface tension using drop or bubble profiles.  ...  In the previous version of ADSA-CB, a global thresholding method was used to segment the bubble profile. However, that technique is of limited accuracy for images with noise and/or lack of contrast.  ...  Acknowledgements This work was supported by a grant from the Canadian Institute of Health Research (MOP-38037) and an Open Fellowship from University of Toronto for YYZ. We also thank Dr.  ... 
doi:10.1016/j.colsurfa.2004.04.081 fatcat:yuv5knscvfbplf37egpg4yta7i

Microfluidic Bubble Logic

M. Prakash, N. Gershenfeld
2007 Science  
Contact force measurements Six tarsal segments were used in our measurements of contact forces.  ...  Varying the distance of the droplet from the leg segment allowed us to measure the dependence of the contact forces on the penetration depth of the hair tips. 5-4c illustrates measurements from multiple  ... 
doi:10.1126/science.1136907 pmid:17289994 fatcat:ujaw4knlifazjls7hylmuu2b6y

A design methodology for 2D sparse NDE arrays using an efficient implementation of refracted-ray TFM

Jerzy Dziewierz, Timothy Lardner, Anthony Gachagan
2013 2013 IEEE International Ultrasonics Symposium (IUS)  
The development of more complex tissues has been limited by the need for techniques that can rapidly organize cells and proteins within large three-dimensional scaffolds, and the need to create vascular  ...  By changing the initial density of the cell bands during hydrogel formation, the technology can produce vascular networks having two distinct morphologiesone that resembles peripheral vascular networks  ...  Statement of Contribution/Methods The influence of the wire tension on the signal has been evaluated by increasing its mechanical tension until disruption.  ... 
doi:10.1109/ultsym.2013.0035 fatcat:th5znfh7y5bklfdbmhb4u6iq2i

Analysis of room transfer function and reverberant signal statistics

Eleftheria Georganti, John Mourjopoulos, Finn Jacobsen
2008 Journal of the Acoustical Society of America  
Applicability of advanced measurement techniques to soundscape studies.  ...  The segmented convolution algorithm allows an efficient computation of the convolution in real-time, by segmentation of the impulse response into several parts.  ...  Laboratory experiments were carried out to explore interfacial and elastic contributions to synthetic aperture sonar ͑SAS͒ images of a solid aluminum circular cylinder having flat ends.  ... 
doi:10.1121/1.2935346 fatcat:lxgnqr6tozajhge3ydet3xomam

A virtual auditory environment for investigating the auditory signal processing of realistic sounds

Sylvain Favrot, Jörg M. Buchholz
2008 Journal of the Acoustical Society of America  
Applicability of advanced measurement techniques to soundscape studies.  ...  The segmented convolution algorithm allows an efficient computation of the convolution in real-time, by segmentation of the impulse response into several parts.  ...  Laboratory experiments were carried out to explore interfacial and elastic contributions to synthetic aperture sonar ͑SAS͒ images of a solid aluminum circular cylinder having flat ends.  ... 
doi:10.1121/1.2936003 fatcat:ontu6yamdvgbnooet5fe36fm74

Ray tracing in a turbulent, shallow‐water channel

Christian Bjerrum‐Niese, René Lützen, Leif Bjo/rno/
1998 Journal of the Acoustical Society of America  
Shannon ͓ J. Acoust. Soc.  ...  The fourth moments of the field can diverge, which will lead to abnormally high excessive noise. The measurement of the excessive noise gives information about the structure of the material.  ...  applications.  ... 
doi:10.1121/1.422455 fatcat:vqypn7trzberzap3bkznkoddcu

Scattering by two spheres: Theory and experiment

Irina Bjo/rno/, Leif Bjo/rno/
1998 Journal of the Acoustical Society of America  
Shannon ͓ J. Acoust. Soc.  ...  The fourth moments of the field can diverge, which will lead to abnormally high excessive noise. The measurement of the excessive noise gives information about the structure of the material.  ...  applications.  ... 
doi:10.1121/1.421626 fatcat:qf2u35fztjfgtgredwhbg53zwm

Scientific Program

2014 Procedia IUTAM  
Habashi, Canada An improved surface tension model for numerical simulation of interfacial flow by smoothed particle hydrodynamics method FS02-053 Mingyu Zhang * , Shudao Zhang, China Improved adams linear  ...  Popov * , Germany A nano-cheese-cutter to measure interfacial adhesion of freestanding nano-fibers SM02-019 Xin Wang * , Johnny Najem, Shing-Chung Wong, Kai-tak Wan, USA On the dynamics of frictional  ...  Thickness-shear vibrations of rectangular plates with free edges by the extended kantorovich method FS07-019 Ji  ... 
doi:10.1016/j.piutam.2014.01.011 fatcat:osy4egnuufdophopfpj75e24jm

Temporal suppression and augmentation of click-evoked otoacoustic emissions

Sarah Verhulst, James M. Harte, Torsten Dau
2008 Hearing Research  
The paper will evaluate the success of the approach and explore its application.  ...  The acoustical effect of reveal blocks, from measuring method to prediction.  ...  Applicability of advanced measurement techniques to soundscape studies.  ... 
doi:10.1016/j.heares.2008.09.008 pmid:18926894 fatcat:bijdlpxpzfcsrjeefayvvu4pl4

Temporal suppression and augmentation of click‐evoked otoacoustic emissions

Sarah Verhulst, James M. Harte, Torsten Dau
2008 Journal of the Acoustical Society of America  
The paper will evaluate the success of the approach and explore its application.  ...  The acoustical effect of reveal blocks, from measuring method to prediction.  ...  Applicability of advanced measurement techniques to soundscape studies.  ... 
doi:10.1121/1.2935694 fatcat:z6yidzqqendznbmrczb3woaiv4

Across‐frequency processes involved in auditory detection of coloration

Jörg M. Buchholz, Paris Kerketsos
2008 Journal of the Acoustical Society of America  
The paper will evaluate the success of the approach and explore its application.  ...  The acoustical effect of reveal blocks, from measuring method to prediction.  ...  Applicability of advanced measurement techniques to soundscape studies.  ... 
doi:10.1121/1.2935741 fatcat:acaporn5qvgb5coauovqkbv6lq

Grafting acoustic instruments and signal processing: Creative control and augmented expressivity

Dan Overholt
2013 Journal of the Acoustical Society of America  
Beranek, we seek to correlate acoustical measurements of spaces used for Sacred Harp singing with subjective evaluations of those spaces made by the singers themselves.  ...  Those measurements are then examined for their applicability as metrics for evaluation of Sacred Harp performance spaces.  ...  To assess which stop place of articulation may be used to simultaneously model affricate bursts, Jensen-Shannon divergence measures are found for probability distributions of acoustic-phonetic features  ... 
doi:10.1121/1.4830794 fatcat:2sexsmbypjcozjctnorzoiy7te

Prediction of room acoustical parameters

A. C. Gade
1991 Journal of the Acoustical Society of America  
Specialized techniques were developed for direct measurement of the acoustic properties of these gas-charged sediments, to subbottom depths of the order of 300 ft (100 m).  ...  The ASCS was designed to remotely classify seafloor sediments by quantitatively and qualitatively measuring the echo return amplitude and pulse character in ten adjustable time windows that correspond  ...  The effects of surface tension and bubble density are also considered. [ Auditorium acoustics: What should we measure? What do we measure and what does it mean? J.P. Vlan and X.  ... 
doi:10.1121/1.2029264 fatcat:lpivxh2jlzbj7m5fkzjiq3xqqi

High-Power Yb-Doped Solid-Core Photonic Bandgap Fiber Amplifier at 1150-1200nm

Hiroki Maruyama, Akira Shirakawa, Ken-ichi Ueda, Christina B. Olausson, Jens K. Lyngsø, Brian Mangan, Jes Broeng
2008 Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing   unpublished
The design enables the measurement of weak nonlinear optical signals at megahertz (MHz) rates for imaging applications. FTuX4 • 4:45 p.m.  ...  Interfacial electron transfer and solvation processes in thin layers of water and ammonia on metal surfaces are studied by femtosecond photoelectron spectroscopy to analyze the tunnelling barrier  ...  Stop by our exhibit to discuss your specifi c application challenges.  ... 
doi:10.1364/fio.2008.ftug5 fatcat:2rman2c7cfczlfuad4o6giy2iq
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