>> ^arvana:

The half-life of the transverse waves propagated from that slap indicate a damping factor of: FIRM.


You said exactly what I was going to post! So, instead...

In this new video being created by our highly skilled graduates; the camera speed will be slightly slower at 1000 FPS @1920x1080 (or higher if intended for use with IMAX or a screen over two meters) with a secondary stream containing a duplicate, but separate feed set proportionately two-centimeters apart from the other feed. Then slightly zoomed out at around a 5.7% overall frame increase in size and a slight 2° shift from the vertical, counter-clockwise. Then combine the two feeds to one feed, except beforehand, polarize the frames (or frame frequencies) 90° from the other (relatively). Hand out polarized glasses--that of course have a film matched to the polarized frequency. Then increase the overall playback time, matching with the framerate speed, to give a new perceived 30 minute length (20 seconds is ridiculous).

Then some 1960's or 1970's music can be added in (the beat of the music must match the wave speed; some "human intercourse" period film pieces may have the required music) to further increase the relation of wave propagation seen in the video demonstration. This will help add to the overall immersion and enjoyment of the experience.

Then, we suggest the use of lubrication (Group 5, with a Viscosity of 800cSt is recommended) and then use some transformational waves (many options are available) at a decent amplitude and frequency. One traditional method used is caused by simple human mechanical kinetic manipulation (flexing muscle groups) in a rhythmic horizontal/vertical oppositional motion spread out over a chosen time span. Speed, duration, and intensity are decided by the user or a human/non-human counterpart. Typically, this will propagate a strand of flagellates into a D-glucose polysaccharide chains in a combined structure for simple discontinuation and cleanup; then quickly proceeding on to the web browser and watching the next "sift*".

If "flagellate" reaction is not noticed or possible for you, please follow the yellow strip on the floor. On your way out you may participate in our free clinical study looking for medical problems. You will need to put on a special garment for the study, and you will receive a complimentary lollipop! Do not be disturbed if this reaction is not noticed as it is a well known and documented myth created by the sub-species that is the focus of our demonstration video. Do not be disturbed if you think you look like as said sub-species.

Thank you for watching our dissertation on wave propagation.
We look forward to our next project on fluid dynamics!


*sift, definition below

sift (sift)
verb. sift·ed, sift·ing, sifts
v.tr.
1. To put (flour, for example) through a sieve or other straining device in order to separate the fine from the coarse particles.
2. To distinguish as if separating with a sieve: sifted the candidates for the job.
3. To apply by scattering with or as if with a sieve: sift sugar on a dessert.
4. To examine and sort carefully: sift the evidence.
v.intr.
1. To make use of a sieve.
2. To pass through or as if through a sieve: a meal that sifts easily.
3. To make a careful examination: sifted through back issues of the magazine.

sift (suhifft)
noun. sift·ed, sift·ing, sifts, spelunking
n.wtf.
1. A video on the website called "Videosift™"; sometimes amusing.
2. A video not on the website called "Videosift™", fought over in a mating like ritual to become a sift.

>> ^BoneRemake:

"Euler's Disk" is a trademark for a product manufactured and distributed by the "Damert Company" (Toysmith Group), consisting of a metal disk, a base having an upwards-facing concave mirror, and holographic, patterned magnetic stickers. One or more magnetic stickers may be attached to the top surface of the disk. The disk, when spun on the mirror, exhibits a spinning/rolling motion. Euler’s Disk has an optimized aspect ratio and precision polished, rounded edges to maximize the spinning/rolling time. A coin spun on a table, or any disc spun on a relatively flat surface, exhibits essentially the same type of motion.
A spinning/rolling disk ultimately comes to rest; and it does so quite abruptly, the final stage of motion being accompanied by a whirring sound of rapidly increasing frequency. As the disk rolls, the point P of rolling contact describes a circle that oscillates with a constant angular velocity ω. If the motion is non-dissipative, ω is constant and the motion persists forever, contrary to observation (since ω is not constant in real life situations).
In the April 20, 2000 edition of Nature, Keith Moffatt shows that viscous dissipation in the thin layer of air between the disk and the table is sufficient to account for the observed abruptness of the settling process. He also showed that the motion concluded in a finite-time singularity.
Moffatt shows that, as time t approaches a particular time t0 (which is mathematically a constant of integration), the viscous dissipation approaches infinity. The singularity that this implies is not realized in practice because the vertical acceleration cannot exceed the acceleration due to gravity in magnitude. Moffatt goes on to show that the theory breaks down at a time τ before the final settling time t0, given by
\tau\simeq\left(2a/9g\right)^{3/5} \left(2\pi\mu a/M\right)^{1/5}
where a is the radius of the disk, g is the acceleration due to Earth's gravity, μ the dynamic viscosity of air, and M the mass of the disk. For the commercial toy (see link below), τ is about 10 − 2 seconds, at which \alpha\simeq 0.005 and the rolling angular velocity \Omega\simeq 500\rm Hz.
Using the above notation, the total spinning time is
t_0=\left(\frac{\alpha_0^3}{2\pi}\right)\frac{M}{\mu a}
where α0 is the initial inclination of the disk. Moffatt also showed that, if t0 − t > τ, the finite-time singularity in Ω is given by.....
http://en.wikipedia.org/wiki/Euler%27s_disk


Nerd.

"Euler's Disk" is a trademark for a product manufactured and distributed by the "Damert Company" (Toysmith Group), consisting of a metal disk, a base having an upwards-facing concave mirror, and holographic, patterned magnetic stickers. One or more magnetic stickers may be attached to the top surface of the disk. The disk, when spun on the mirror, exhibits a spinning/rolling motion. Euler’s Disk has an optimized aspect ratio and precision polished, rounded edges to maximize the spinning/rolling time. A coin spun on a table, or any disc spun on a relatively flat surface, exhibits essentially the same type of motion.

A spinning/rolling disk ultimately comes to rest; and it does so quite abruptly, the final stage of motion being accompanied by a whirring sound of rapidly increasing frequency. As the disk rolls, the point P of rolling contact describes a circle that oscillates with a constant angular velocity ω. If the motion is non-dissipative, ω is constant and the motion persists forever, contrary to observation (since ω is not constant in real life situations).

In the April 20, 2000 edition of Nature, Keith Moffatt shows that viscous dissipation in the thin layer of air between the disk and the table is sufficient to account for the observed abruptness of the settling process. He also showed that the motion concluded in a finite-time singularity.

Moffatt shows that, as time t approaches a particular time t0 (which is mathematically a constant of integration), the viscous dissipation approaches infinity. The singularity that this implies is not realized in practice because the vertical acceleration cannot exceed the acceleration due to gravity in magnitude. Moffatt goes on to show that the theory breaks down at a time τ before the final settling time t0, given by

\tau\simeq\left(2a/9g\right)^{3/5} \left(2\pi\mu a/M\right)^{1/5}

where a is the radius of the disk, g is the acceleration due to Earth's gravity, μ the dynamic viscosity of air, and M the mass of the disk. For the commercial toy (see link below), τ is about 10 − 2 seconds, at which \alpha\simeq 0.005 and the rolling angular velocity \Omega\simeq 500\rm Hz.

Using the above notation, the total spinning time is

t_0=\left(\frac{\alpha_0^3}{2\pi}\right)\frac{M}{\mu a}

where α0 is the initial inclination of the disk. Moffatt also showed that, if t0 − t > τ, the finite-time singularity in Ω is given by.....

http://en.wikipedia.org/wiki/Euler%27s_disk

>> ^westy:

the viscosity of the material seemed wrong. I think liquid texture seemed to have to much of a defuse reflection.
other than that pritty nice .


Agreed; this is one thing I've always noticed with nearly all liquid rendering... the surface is almost always reflects too much light. Perhaps the surface tension simulations just aren't up to par yet? In natural liquid movement I think it tends to be much more disrupted and light absorbing...

Edit: I should also say that I'm not trying to say this isn't still great.

the viscosity of the material seemed wrong. I think liquid texture seemed to have to much of a defuse reflection.

other than that pritty nice .

this movie was daaaaark and the humor had a viscosity of tar.
it made you laugh but you felt uncomfortable while you were doing it.
yep..i loved this movie.
robin williams was fantastic and who knew bobcat goldthwiat could make such a gem of a movie.

The solution to that used here would be to place the passenger in a tub of fluid with a very high viscosity. In this case obviously... maple syrup.

>> ^Rugil:
So it behaves like water, as opposed to any other fluid?


it appears to behave like a fluid with the viscosity of water at STP

^ Completely agree, they got viscosity all wrong, the fluid seems to stick to objects in weird ways and the momentum seems all wrong, watch near the beginning as a seemingly small velocity flow climbs all the way up the side of the wall, despite plenty of open space for it to slosh out towards the camera.

http://www.videosift.com/video/CG-Liquid-like-youve-never-seen-before-Amazing

This is a great example of good CG fluids, but I'm assuming it isn't real time. Still, something like this is the goal as far as I'm concerned, here it seems like the focus is on light reflecting off the water and maybe droplet creation/motion, but to me water looks more real when it flows correctly.

From ye olde Wikipedia: "A non-Newtonian fluid is a fluid which cannot be described by a single constant viscosity. Most commonly, the viscosity changes with the applied shear stress."

Cornstarch and water is probably the simplest non-Newtonian fluid.

It is a bit pretentious sounding, though. Just call it cornstarch...

>> ^RedSky:
hell I'm sure part of the reason people were laughing in the audience was that they simply didn't realise they held these deep seeded generalisations and laughed because they were made uncomfortable to be forced to confront them. (I switched "I'm" and "sure," but only cuz I'm sure it was a typo)

100% agreed.

>> ^RedSky:
some people would tend to gravitate from a harmless confrontation of a relatively amusing mannerism from one's culture's point of view to another, to extrapolated generalisations, oversimplification and eventual detachment and disassociation from groups of people they perceive as 'different'. If that's the case though, the problem isn't the contrasting of cultures, it's the cognitive chain of processes that leads you to that eventual conclusion. So, it may be a slippery slope, but only if your slope is slippery


I think we can agree that the only thing that increases the viscosity of such cognitive slopes is education (whether in school, at home, or whatever the context) and exposure to what anthropologists (like myself) call "the strange"--meaning any culture or set of behavioral characters one did not experience until one's identity was at least partially defined. From what I've seen since I started lurking here a year ago, I trust that the people in this audience (the Sift) have had that education and/or exposure (whether socialized into us or developed by automath)--hence my realization that this was a silly place to pick a fight. But I DO NOT trust the at-large public with the same sense of responsibility. And I suppose I've projected that categorization onto the audience present at Pinette's show and onto the casual viewer of this vid, albeit irrationally.

>> ^RedSky:
I don't believe he went over the line. Making fun of Asian dialects/accents and Indian cuisine? I would see no reason to be genuinely offended if someone made fun of my accent or choice of food. You or anyone else is free to have a differing opinion though, as that's certainly a normative statement.
I admit though that I'm white and have never really been culturally or ethnically discriminated against so I don't pretend to genuinely understand the issue from a first person point of view


I am also white, but my travels have brought me face to face with the true ugliness of racism one can only know when it rears itself against oneself (I expect anecdotes are not necessary, but they can be provided). As a lucky member of the underrated club of we who have come to know the world in the singular locale New York City, and perhaps because I was encouraged to love "the strange" very, very early in my development, I found myself able to mitigate the truly visceral hatred I felt in those moments. Racism elicits an immediate emotional--and sometimes psychosomatically physiological--response. It is not only unwise, but inequitable and irresponsible to require or expect the human animal to overcome that response.

That is probably the cleverest thing I've seen in ages. Wow. That would make a perfect interactive art/science exhibit at a museum. I'd love to see a bigger version or several using materials with different viscosities. Man, I wanna make one at home now.
::storms Radioshack::

furit loopies! armies of viscosity! haha