Posted on 24 May, 2013
Reblogged from mionoki  

Tumblr Engineering: My Philosophy On Alerting

robewaschuk:

I wrote some stuff while I was at Google about writing clean alerts and keeping an oncall rotation sane; after some cleanup they’ve allowed me to make it public. Of course, this represents my opinions and not Google’s. They do reflect what we think are best practices at Tumblr,…

Posted on 23 May, 2013
Reblogged from engineering  Source robewaschuk

"The B in Benoît B. Mandelbrot stand for Benoît B. Mandelbrot."

Posted on 22 May, 2013
Reblogged from opit  

gearcats:

Gigi on the Freevox console ready to hit the record button

Posted on 22 May, 2013
Reblogged from gearcats  

Posted on 21 May, 2013
Reblogged from szczym  Source dozydozy

Directional Cues: An Experiment

A simple psychoacoustical experiment can demonstrate how simple changes in sounds falling on the ear can yield subjective directional impressions. Listen with a headphone on one ear to an octave bandwidth of random noise arranged with an adjustable notch filter. Adjusting the filter to 7.2 kHz will cause the noise to seem to come from a source on the level of the observer. With the notch adjusted to 8 kHz, the sound seems to come from above. With the notch at 6.3 kHz, the sound seems to come from below. This experiment demonstrates that the human hearing system extracts directional information from the shape of the sound spectra at the eardrum.

Master Handbook of Accoustics, 5th ed., p. 41

Posted on 18 May, 2013

sutkus:

omg

Posted on 17 May, 2013
Reblogged from sutkus  Source niknak79

"Skateboarding is not a hobby. And it is not a sport. Skateboarding is a way of learning how to redefine the world around you. For most people, when they saw a swimming pool, they thought, ‘Let’s take a swim.’ But I thought, ‘Let’s ride it.’ When they saw the curb or a street, they would think about driving on it. I would think about the texture. I slowly developed the ability to look at the world through totally different means."

Posted on 14 May, 2013
Reblogged from pukomuko  

bestnatesmithever:

we-are-star-stuff:

Who says North is up?

Upside Down maps (also known as South-Up or Reversed maps) offer a completely different perspective of the world we live in.

Technically speaking, even referring to the earth with words like “up” or “down” or comparing places with words “above” or “below” is flawed, considering that the earth is a spherical body (it’s actually slightly “fatter” at the equator) and flying through 3 dimensional space with no reference of up or down. However, the issue of “up” and “down” does become an issue when viewing the surface of the earth projected onto a flat piece of paper (a map). And the effect of the orientation of a map is more significant than you might realize.

As all maps require orientation for reference, the issue of how to layout the map orientation is as old as maps themselves. As map orientation is completely arbitrary, it is not surprising that they differed throughout time periods and regions.

The convention of North-up is usually attributed to the Egyptian astronomer Ptolemy (90-168 AD). Justifications for his north-up approach vary. In the middle ages, East was often placed at top. This is the origin of the term “The Orient” to refer to East Asia. During the age of exploration, European cartographers again followed the north-up convention…perhaps because the North Star was their fixed reference point for navigation, or because they wanted (subconsciously or otherwise) to ensure Europe’s claim at the top of the world.

In modern times, reversed maps are made as a learning device or to illustrate Northern Hemisphere bias. Different from simply turning a north-up map upside down, a reversed map has the text oriented to be read with south up.

The famous “Blue Marble” photograph of the Earth taken from on board Apollo 17 was originally oriented with the south pole at the top, with the island of Madagascar visible just left of center, and the continent of Africa at its right. However, the image was turned upside-down to fit the traditional view.

While the orientation of a map might seem harmless, it can have a significant effect on one’s perception of the world, and the relative importance of the different place in it.

In speech, we often refer to places being “above” or “below” others. Think of how you would say you’re about to travel to the state or country to your north or south (to go “down” to Kentucky from Indiana, or “up” to Canada from the US). Without even mentioning geography, ask any grade school student whether Mexico is “above” or “below” the United States. We’re all familiar with the “land down under”. As we often correlate importance to relative height (think how a citizens of a country will fly their flag higher than all other flags), the north-up convention reinforces the idea that northern bodies are more important than their southern neighbors. Suddenly, traveling “down” to the South might have an inference much deeper than geographic location.

After looking at the map more closely, you may realize that the South-Up orientation may change your perception of the relative status of different places. For example, South America suddenly looks to have more prominence, and Africa and the Middle East completely dwarf Europe. Likewise, tucking Northern Europe, Canada, and Russia away at the bottom of the map, subconsciously takes away their status.

To summarize, unconditionally accepting the north-up map convention without at least appreciating the effect stands at odds with viewing all people and places within the world equally. x x

image

Posted on 14 May, 2013
Reblogged from sutkus  Source we-are-star-stuff

didntmeantopost:

image

Posted on 10 May, 2013
Reblogged from pukomuko  Source didntmeantopost

wnycradiolab:

expose-the-light:

Acoustic Levitation

At the U.S. Department of Energy’s Argonne National Laboratory, scientists have been experimenting with sound waves and pharmaceutical solutions, levitating soluble drops between two speakers facing each other. While their research has produced some visually fascinating results, it has also led to the discovery of a far more effective method for creating amorphous drugs, which happen to be the more desirable of two forms that pharmaceutical drugs can take.Watch Video Here. 

GIFs by Science-llama

WOW.

Posted on 9 May, 2013
Reblogged from proofmathisbeautiful  Source mymodernmet.com

"This is an algorithmically-generated non-analytical map of the musical genre-space. Genres and artists are positioned by code and data, adjusted for legibility, but the underlying vectors are less interesting than the juxtapositions and clusters that they produce, so the axes have been deliberately left unlabeled and uncalibrated. You are invited to imagine your own qualities and magnitudes that the geometry might be expressing."

Posted on 7 May, 2013
Source furia.com