If it’s not a joke, than what can I say - it’s an interesting observation (but for what?)

http://arxiv.org/abs/physics/0606246

You must see it:

Physics, abstract
physics/0606246

From: Jose-Luis Aragon [view email]Date: Wed, 28 Jun 2006 14:10:58 GMT   (167kb)

Kolmogorov scaling in impassioned van Gogh paintings

Authors:
J.L. Aragón,
Gerardo G. Naumis,
M. Bai,
M. Torres,
P.K. Maini

Comments: 3 pages, 6 figures

Subj-class: Fluid Dynamics

We show that some impassioned van Gogh paintings display scaling properties
similar to the observed in turbulent fluids, suggesting that these paintings
reflect the fingerprint of turbulence with such a realism that is even
consistent with the way that a mathematical model characterizes this
phenomenon. Specifically, we show that the probability distribution function
(PDF) of luminance fluctuations of points (pixels) separated by a distance R is
consistent with the Kolmogorov scaling theory in turbulent fluids. We also show
that the most turbulent paintings of van Gogh coincide with periods of
prolonged psychotic agitation of this artist.

The conjunction is like this: if you see eddies in this beautiful picture from NASA

Then you may start doing all kind of PDF analysis of everything and find out maybe that van Gogh’s paintings, e.g. The Starry Night is also “turbulent”, isn’t it nice?

http://www.moma.org/collection/printable_view.php?object_id=79802

URAPIV for cars?

The researchers from the International Automotive Research Centre at the Warwick University has asked if URAPIV can perform on the images like the example above. The original images are typical gray scale images, but taken with a camera that also moves. Therefore, the motion is a superposition of the motion of cars (note the direction of the middle jeep) and of the "optical flow" because of the camera shift. Anyhow, it was an interesting challenge and we were happy with the preliminary result. For this purpose we also updated URAPIV with a version for Matlab R14SP2 (R14 is ver 7) that reads TIFF, JPG, BMP or all other formats that IMREAD function of Matlab can read. The names are like from a high-speed camera (sometimes called time resolved PIV or high frame rate PIV, etc.) and we analyze 1st with the 2nd, 2nd with the 3rd, and so on.

The strange image is an overlay of the two images in one RGB image, when the first one is the red layer (R) and the second image is the blue layer (B). Arrows are green, respectively. The magenta is all the regions that didn't change and the differences are seen between the images where the color is blue or red. In Matlab we do it like this:

>> imshow(cat(3,a,a*0,b)); % a/b are the first/second image  

Don't hesitate to ask for the most recent version by e-mail, we are always glad to see URAPIV that helps to resolve different problems.

PIV analysis software in Pascal

AnaPIV is a free, open-source software for PIV analysis of PCX images, written by Holger Nobach.

AnaPIV calculates two-dimensional vector fields from PIV images.
The program implements

• iterative vector field correction
• window sub-pixel shift and deformation
• interrogation area weighting

The program is available pre-compiled for Mac OS X PowerPC or as a 32
bit application for Windows including its source code in Pascal.

Very nice feedback from the URAPIV users in Spain

We received the following e-mail that we appreciate a lot:

This is the last work with PIV. The work was presented
in a congress, in Milan.

Now, we continue with this inventigation. …

Good luck for PyPIV!

Jose Manuel Pedrero

The paper is entitled:
EXPERIMENTAL INVESTIGATION OF FLOW PATTERN IN ENHANCED HEAT EXCHANGERS WITH ACTIVE INSERT DEVICES
by
J. P. Solano*, A. García*, J. M. Pedrero**, P. G. Vicente**, A. Viedma*,
*Departamento de Ingeniería Térmica y de Fluidos, Universidad Politécnica de Cartagena. Campus de la Muralla del Mar, 30202 Cartagena, Spain.
Tel: +34 968 32 5938, Fax: +34 968 32 5999, e-mail address: juanp.solano@upct
**Departamento de Ingeniería de Sistemas Industriales, Universidad Miguel Hernández.. Avenida del Ferrocarril, s/n, 03202 Elche, Spain.

You can get a copy directly from the authors or send us an e-mail and we’ll forward the request.

THE question: how to make money from open source scientific software?

Open Science Blog asks very good questions: how to make money from open source scientific software? Do you have an answer? write me a private e-mail, don't comment in public

http://www.openscience.org/blog/?p=164

Oh, our answer is:

1. Dual licensing (ask us about the license for URAPIV or PyPIV)

2. Sell services - the name of our consulting company is a secret, but you can ask for a price quote :-) 

“Cloud Dancer” compiles PIV literature

Cloud Dancer (that’s the blog name of Jichul Kim) compiles some literature survey on PIV and related topics. Interesting. We can only suggest to include our work in Exp. Fluids on PIV and IR or XPIV, etc.

The copy of the list is:

PIV measurements of a microchannel flow
CD
Meinhart, ST Wereley, JG Santiago - Experiments in Fluids, 1999 -
springerlink.com This work is supported by AFOSR/DARPA
F49620-97-1-0515, under the direction of Dr. Tom Beutner and Dr. Al
Pisano, by DARPA F33615-98-1-2853 under the … Cited by 118 - Web Search - widget.ecn.purdue.edu - ecf.utoronto.ca - fluid.me.pusan.ac.kr - all 8 versions » - UC-eLinks

A particle image velocimetry system for microfluidics
JG
Santiago, ST Wereley, CD Meinhart, DJ Beebe, RJ … - Experiments in
Fluids, 1998 - springerlink.com JG Santiago, DJ Beebe Department of
Electrical and Computer Engineering, Beckman Institute for Advanced
Science and Technology, 4265 Beckman Institute, … Cited by 110 - Web Search - microfluidics.stanford.edu - engineering.ucsb.edu - widget.ecn.purdue.edu - all 9 versions » - UC-eLinks

Cross-correlation analysis for temperature measurement
V
Hohreiter, ST Wereley, MG Olsen, JN Chung - Measurement Science and
Technology, 2002 - iop.org Page 1. I NSTITUTE OF P HYSICS P UBLISHING M
EASUREMENT S CIENCE AND T ECHNOLOGYMeas. Sci. Technol. 13 (2002)
1072–1078 PII: S0957-0233(02)31547-9 … Cited by 7 - Web Search - microfluidics.stanford.edu - widget.ecn.purdue.edu - adsabs.harvard.edu - all 7 versions » - UC-eLinks

Particle imaging techniques for microfabricated fluidic systems
S
Devasenathipathy, JG Santiago, ST Wereley, CD … - Experiments in
Fluids, 2003 - springerlink.com Page 1. Particle imaging techniques for
microfabricated fluidic systems S.Devasenathipathy, JG Santiago, ST
Wereley, CD Meinhart, K. Takehara … Cited by 17 - Web Search - engineering.ucsb.edu - microfluidics.stanford.edu - adsabs.harvard.edu

Out-of-plane motion effects in microscopic particle image velocimetry.
MG
Olsen, CJ Bourdon - Journal of Fluids Engineering(Transactions of the
ASME), 2003 - csa.com Out-of-plane motion effects in microscopic
particle image velocimetry. MG Olsen,CJ Bourdon Journal of Fluids
Engineering(Transactions of the ASME) 125:5 pp. … Cited by 7 - Web Search - UC-eLinks

Validation of an analytical solution for depth of correlation in microscopic particle image …CJ
Bourdon, MG Olsen, AD Gorby - Measurement Science and Technology, 2004
- iop.org Page 1. I NSTITUTE OF P HYSICS P UBLISHING M EASUREMENT S
CIENCE AND T ECHNOLOGYMeas. Sci. Technol. 15 (2004) 318–327 PII:
S0957-0233(04)68454-2 … Cited by 6 - Web Search - iop.org - ingentaconnect.com - csa.com - all 5 versions » - UC-eLinks

Micron-Resolution Particle Image Velocimetry
ST
Wereley, CD Meinhart - 2004 - engineering.ucsb.edu Page 1. 1
Micron-Resolution Particle Image Velocimetry Steven T. WereleySchool of
Mechanical Engineering Purdue University Carl … Cited by 4 - View as HTML - Web Search - microfluidics.stanford.edu - adsabs.harvard.edu - link.aip.org

Microscale flow visualization
D
Sinton - Microfluidics and Nanofluidics, 2004 - springerlink.com Page
1. REVIEW D. Sinton Microscale flow visualization Received: 4 July 2004
/ Accepted:10 July 2004 / Published online: 19 August 2004 Ó
Springer-Verlag 2004 … Cited by 3 - Web Search - me.uvic.ca - UC-eLinks

Simultaneous, Spatially-Resolved Temperature and Velocity Measurements Using Cross-Correlation PIV
ST
Wereley, VP Hohreiter - paper, 2002 - in3.dem.ist.utl.pt Page 1.
Simultaneous, Spatially-Resolved Temperature and Velocity Measurements
UsingCross-Correlation PIV by ST Wereley (1) and VP Hohreiter (2) … Cited by 1 - View as HTML - Web Search

STACKED MICROCHANNEL HEAT SINKS FOR LIQUID COOLING OF MICROELECTRONICS DEVICES
CP
Wong, P Hesketh, B Frazier, A Fedorov - smartech.gatech.edu Page 1.
STACKED MICROCHANNEL HEAT SINKS FOR LIQUID COOLING OF MICROELECTRONICS
DEVICESA Dissertation Presented to the Academic Faculty by Xiaojin Wei
… View as HTML - Web Search - etd.gatech.edu

GPIV has a new release

If you're looking for completely free solution for your PIV needs and you're not satisfied with our URAPIV or PyPIV projects, you can download GPIV - GPL, ANSI-C package (also on the Sourceforge.net) with acquisition, analysis, all in one package. Good work:

 

That’s THE place to do (URA)PIV

Pinifarina ARC, The Turbulence Generation System, ohoh. almost crying. just look at it
http://arc.pininfarina.it/pictures/gallery/TGS_1.jpg

 

NASA is on Earth and Sky radio with PIV helping to reduce the jet engine noise

Yes, PIV is also there. No doubts. It's not clear why Dantec (he he he) website is linked to the explanation of PIV (I mean, why not to URAPIV blog, for example?), but still, it's a nice application. very nice. 

http://www.earthsky.org/shows/show.php?date=20060429 

 

this is the noisy jet engine. How do you know where most of the noise is produced? right. you do PIV. 

NMR is a serious competiting technique for liquid flows?

Recent article in J. Magnet. Reson. (i guess it is magnetic resonance) reports on 1 meter-per-second flow, measured with some special trick and NMR. That's what we call "serious" competition.