spread your thoughts

Watch carefully the below video. It is related to a experiment conducted to monkeys and it concludes valuable insights regarding the way the force of fear and terrorism by "some persons, communities etc." impacts on the human discretion and consciousness.

It is very interesting!!! It also includes Greek subtitles, hope not to bother the non-Greek visitors!!! :-)

Tell me your thoughts about it!



Source: Tromaktiko

Pool of Spirit releases a new column wanting to introduce you in the magic of Greek poetry named "Greek poets". We will present greek poems and a brief history of the poets.

A fractal is "a rough or fragmented geometric shape that can be split into parts, each of which is a reduced-size copy of the whole," a property called self-similarity. Roots of mathematically rigorous treatment of fractals can be traced back to functions studied by Karl Weierstrass, Georg Cantor and Felix Hausdorff in studying functions that were continuous but not differentiable; however, the term fractal was coined by Benoît Mandelbrot in 1975 and was derived from the Latin fractus meaning "broken" or "fractured." A mathematical fractal is based on an equation that undergoes iteration, a form of feedback based on recursion.

A fractal often has the following features:

1. It has a fine structure at arbitrarily small scales.
2. It is too irregular to be easily described in traditional Euclidean geometric language.
3. It is self-similar (at least approximately or stochastically).
4. It has a Hausdorff dimension which is greater than its topological dimension (although this requirement is not met by space-filling curves such as the Hilbert curve).
5. It has a simple and recursive definition.

Because they appear similar at all levels of magnification, fractals are often considered to be infinitely complex (in informal terms). Natural objects that are approximated by fractals to a degree include clouds, mountain ranges, lightning bolts, coastlines, snow flakes, various vegetables (cauliflower and broccoli), and animal coloration patterns. However, not all self-similar objects are fractals—for example, the real line (a straight Euclidean line) is formally self-similar but fails to have other fractal characteristics; for instance, it is regular enough to be described in Euclidean terms. Images of fractals can be created using fractal-generating software.





Examples

A class of examples is given by the Cantor sets, Sierpinski triangle and carpet, Menger sponge, dragon curve, space-filling curve, and Koch curve. Additional examples of fractals include the Lyapunov fractal and the limit sets of Kleinian groups. Fractals can be deterministic (all the above) or stochastic (that is, non-deterministic). For example, the trajectories of the Brownian motion in the plane have a Hausdorff dimension of 2.

Chaotic dynamical systems are sometimes associated with fractals. Objects in the phase space of a dynamical system can be fractals (see attractor). Objects in the parameter space for a family of systems may be fractal as well. An interesting example is the Mandelbrot set. This set contains whole discs, so it has a Hausdorff dimension equal to its topological dimension of 2—but what is truly surprising is that the boundary of the Mandelbrot set also has a Hausdorff dimension of 2 (while the topological dimension of 1), a result proved by Mitsuhiro Shishikura in 1991. A closely related fractal is the Julia set.

Source: Wikipedia

This is a very interesting training material of engineering/physical sciences. This apparatus was developed by Prototype Machinist, John DeMoss and Dr. Kevin Cahill of the Department of Physics and Astronomy. It costs 450$ and you can buy it from here

This apparatus is an effective and safe educational tool or conceptual aide that displays the properties of laminar flow. The apparatus is designed to for easy operations and cleaning and provides great visual, real-time display of laminar flow. Students and educators will enjoy using the apparatus while gaining valuable knowledge of fluid dynamics.

What is laminar flow?
When a fluid (gas or liquid) flows in a defined manner with distinct paths it is said to be in laminar flow. Laminar flow is a fundamental physical phenomenon that occurs frequently in everyday life. However, the concept of laminar flow can sometimes be difficult to put into context when discussing fluid dynamics. Turbulent flow on the other hand may be a little easier to explain as the only requirement is that there is no order to the fluids fluctuations. When attempting to illustrate the properties associated with laminar flow this apparatus is most effective.

How it works

This apparatus allows for the visual examination of a fluid undergoing laminar flow. Initially, within the apparatus, various colored droplets are suspended in a fluid and all are in a state of equilibrium where the different fluids are distinctly separated. When the apparatus is rotated the fluids revolve in a controlled manner and the droplets seem to become completely intermixed yet still divided from the outer fluid. After several rotations the apparatus is then operated in the reverse direction. Since the Reynolds number within this apparatus is less then one, an almost complete reversal of the previous laminar flow is undertaken. The result is that after the same amount of rotations in the opposite direction, the droplets return to their initial, distinctly separated, forms.

What the video by click the image below to take more insight. The video was filmed at the University of New Mexico - Physics Department.