Zibaldone online

di Annarita http://www.wikio.it

http://www.wikio.it

www.flickr.com

Italian Blogs for Darfur

BlogItalia.it - La directory italiana dei blog

I miei blog didattici

Scientificando

Matematic@Mente

Il mio blog sul web 2.0

Web 2.0 and something else

22nd Luglio 2014

Fotoset rebloggato da Fuck Yeah Fluid Dynamics con 914 note

fuckyeahfluiddynamics:

Wingtip vortices are a result of the finite length of a wing. Airplanes generate lift by having low-pressure air travelling over the top of the wing and higher pressure air along the bottom. If the wing were infinite, the two flows would remain separate. Instead, the high-pressure air from under the wing sneaks around the wingtip to reach the lower pressure region. This creates the vorticity that trails behind the aircraft. I was first introduced to the concept of wingtip vortices in my junior year during introductory fluid dynamics. As I recall, the concept was utterly bizarre and so difficult to wrap our heads around that everyone, including the TA, had trouble figuring out which way the vortices were supposed to spin. A few good photos and videos would have helped, I’m sure. (Photo credits: U.S. Coast Guard, S. Morris, Nat. Geo/BBC2)

16th Luglio 2014

Foto rebloggato da art by cara con 6.658 note

chrica:

Animation done for art class. It was originally supposed to be just black and white, but since this is my first attempt at animating anything, it looked a bit dull so I threw some colours and textures at it in photoshop
[x]

chrica:

Animation done for art class. It was originally supposed to be just black and white, but since this is my first attempt at animating anything, it looked a bit dull so I threw some colours and textures at it in photoshop

[x]

15th Luglio 2014

Fotoset rebloggato da big blue boo con 836 note

bigblueboo:

gears within gears

10th Luglio 2014

Fotoset rebloggato da OKKULT Motion Pictures con 938 note

okkultmotionpictures:

EXCERPTS >|< Journey to the Center of a Triangle (1976)


 | Hosted at: Internet Archive
 | From: Academic Film Archive of North America
 | Download: Ogg | 512Kb MPEG4 | MPEG2
 | Digital Copy: not specified


A series of Animated GIFs excerpted from Journey to the Center of a Triangle (1977): another fabulous film by the Cornwells, created on the Tektronics 4051 Graphics Terminal. Presents a series of animated constructions that determine the center of a variety of triangles, including such centers as circumcenter, incenter, centroid and orthocenter. More on the Cornwells at http://www.afana.org/cornwell.htm

According to son Eric Cornwell, here’s how the film was made: The 4051 produced only black and green vector images, not even grey scale. The film’s scenes were divided into layers in the programming, one layer for each of the colors in the scene, and each was shot separately onto high-contrast fine-grained b&w film stock. The final scene in “Journey” had 5 layers: one for each of the four colored dots, plus one for the white triangle and line. 

These five clips were then multiple-exposed onto color film on an optical printer, using colored filters to add the desired color to each black&white layer as it was copied. The resulting color was much better than a film of an RGB display would have been because the color filters on the optical printer allowed access to the full range of the color negative film, allowing much more saturated colors. All of that color is pretty much lost now, between prints fading and/or transfers to the VHS, and then viewing them on a computer screen which has a much more limited color gamut. Please imagine it all in bright, brilliant colors. (from Internet Archive)

We invite you to watch the full video HERE.




EXCERPTS by OKKULT Motion Pictures: a collection of GIFs excerpted from out-of-copyright/historical/rare/controversial moving images. 
A digital curation project for the diffusion of open knowledge.

>|<

8th Luglio 2014

Foto rebloggato da nothingness above con 142.830 note

Fonte: invocado

7th Luglio 2014

Foto rebloggato da xySciences con 266 note

xysciences:

An Ice Cube burning red-hot due to non-contact, induction, heating.
[Click for more interesting science facts and gifs]

xysciences:

An Ice Cube burning red-hot due to non-contact, induction, heating.

[Click for more interesting science facts and gifs]

7th Luglio 2014

Foto rebloggato da Alx&ra's place con 17 note

alxndrasplace:

(NASA)  Space Oddity: Bizarre Hybrid Star Found After 40-Year Search
Astronomers have apparently discovered the first of a class of strange hybrid stars, confirming theoretical predictions made four decades ago.
In 1975, physicist Kip Thorne and astronomer Anna Zytkow proposed the existence of odd objects that are hybrids between red supergiants and neutron stars — the collapsed, superdense remnants of supernova explosions.
These so-called Thorne-Zytkow objects (TZOs) likely form when a red supergiant gobbles up a nearby neutron star, which sinks down into the giant’s core, researchers said. TZOs look like ordinary red supergiants, like the famed star Betelgeuse in the constellation Orion, but differ in their chemical fingerprints, the theory goes.
(more…)

alxndrasplace:

(NASA)  Space Oddity: Bizarre Hybrid Star Found After 40-Year Search

Astronomers have apparently discovered the first of a class of strange hybrid stars, confirming theoretical predictions made four decades ago.

In 1975, physicist Kip Thorne and astronomer Anna Zytkow proposed the existence of odd objects that are hybrids between red supergiants and neutron stars — the collapsed, superdense remnants of supernova explosions.

These so-called Thorne-Zytkow objects (TZOs) likely form when a red supergiant gobbles up a nearby neutron star, which sinks down into the giant’s core, researchers said. TZOs look like ordinary red supergiants, like the famed star Betelgeuse in the constellation Orion, but differ in their chemical fingerprints, the theory goes.

(more…)

7th Luglio 2014

Foto rebloggato da Alx&ra's place con 17 note

alxndrasplace:

(NASA)  Space Oddity: Bizarre Hybrid Star Found After 40-Year Search
Astronomers have apparently discovered the first of a class of strange hybrid stars, confirming theoretical predictions made four decades ago.
In 1975, physicist Kip Thorne and astronomer Anna Zytkow proposed the existence of odd objects that are hybrids between red supergiants and neutron stars — the collapsed, superdense remnants of supernova explosions.
These so-called Thorne-Zytkow objects (TZOs) likely form when a red supergiant gobbles up a nearby neutron star, which sinks down into the giant’s core, researchers said. TZOs look like ordinary red supergiants, like the famed star Betelgeuse in the constellation Orion, but differ in their chemical fingerprints, the theory goes.
(more…)

alxndrasplace:

(NASA)  Space Oddity: Bizarre Hybrid Star Found After 40-Year Search

Astronomers have apparently discovered the first of a class of strange hybrid stars, confirming theoretical predictions made four decades ago.

In 1975, physicist Kip Thorne and astronomer Anna Zytkow proposed the existence of odd objects that are hybrids between red supergiants and neutron stars — the collapsed, superdense remnants of supernova explosions.

These so-called Thorne-Zytkow objects (TZOs) likely form when a red supergiant gobbles up a nearby neutron star, which sinks down into the giant’s core, researchers said. TZOs look like ordinary red supergiants, like the famed star Betelgeuse in the constellation Orion, but differ in their chemical fingerprints, the theory goes.

(more…)

6th Luglio 2014

Foto rebloggato da Turn Down For What con 2.390 note

public-raving:

Δ

public-raving:

Δ

Fonte: jointphilippe

6th Luglio 2014

Foto rebloggato da School of Visual Arts con 4.084 note

schoolofvisualarts:

Lighting the way by Lily Padula

schoolofvisualarts:

Lighting the way by Lily Padula