Weekend Cat Blogging: Angry Birds

Luna is spending a few minutes playing with her newest toy, a gift to her from recent visitors to CatSynth HQ:

For those who are not familiar with this particular critter, it is the original Angry Bird from the mobile and web game Angry Birds. It’s a rather silly but fun game, more in the style of arcade games than those really annoying “casual games” that were all the rage in the tech startup world and now thankfully on the decline. We don’t play a lot of computer games these days, though Luna did have fun with her toy.

I think Luna prefers the real angry birds that she sees through the window, especially the big fat city pigeons.


Weekend Cat Blogging #382 is hosted by the late great Meowza at iMeowza.

Meanwhile, Ritzi will be hosting Carnival of the Cats tomorrow at iInfidel.

And the Friday Ark is at the modulator

Eye to Eye: Imaginary Exponentiation

The term “imaginary number” is an unfortunate one. It makes these numbers seem strange and separate from more familiar “real” numbers, when in fact there is very little difference. I prefer the term complex numbers that encompasses the closed set of all real and imaginary numbers with the usual arithmetic operators. Recall that the imaginary numbers are numbers that are less then zero when squared, with the imaginary constant i representing the square root of -1:

i 2 = -1

One can add, subtract, multiply and divide with it just like other numbers. One can not only square it to get -1, but also take its square root, which turns out to be another complex number.

 i  = 2/2 + i 2/2

But what about raising i to the ith power?

Surely, that must be some sort of weird “very imaginary” number, right? But in fact, it is just a real number, approximately 0.2078796…

The same mechanism that allows us to take the square root of i can be used to explain why ii is real. Just as real numbers can be visualized on the familiar number line, complex numbers can be represented by a plane where the horizontal axis represents real numbers and the vertical axis represents imaginary numbers.

Any complex number x + yi can also be expressed with an angle and a radius: rcosθ+risinθ. Using the angular representation on the plane, we can then visualize any exponentiation operation (take the square, the square root, etc.) as a rotation around the origin.

Squaring a number means doubling the angle. Taking the square root means cutting the angle in half. The imaginary constant i has a radius of 1 and an angle of 90 degrees (or π/2 radians). Doubling it to 180 degrees rotates to the position of -1 on the complex plane. SImilarly, taking the square root of i reduces the angle to 45 degrees, moving it into the position of 2/2 + i 2/2.

But how does one rotate an angle by an imaginary amount? To accomplish this, we turn to one of my favorite formulas in all of mathematics, Euler’s identity:

e = cosθ+isinθ

This identity unites trigonometry and exponentiation using the complex plane and rotations. It is more than just a curiosity and has practical applications including signal processing that we use for synthesizers and audio effects. However, it does allow us to also calculate the value of ii:

ii = cos(πi/2) + isin(πi/2) = eiπi/2 = e-π/20.20787957635076193…

It is odd how rotating an imaginary number by an imaginary factor yields a real number.

Fun with Highways: I-990

Sometimes I just need a virtual escape based purely on numerical criteria. Such is the case with I-990, the highest-numbered Interstate highway in the U.S. It is a relatively short spur highway northeast of Buffalo, New York, and carries the name Lockport Expressway, suggesting that it was intended to connect from I-290 north of Buffalo to the town of Lockport. We did visit Lockport in our New York Primary Highways article earlier this year. However, as it currently exists, I-990 just ends at a simple intersection with a local surface highway, NY 263.


[Click to enlarge]

As can be seen in the above image, it looks like there is a piece of unused roadway representing where they highway would have continued past its current terminus.

This video follows I-990 along its entire 6.43-mile length north from I-290 to its terminus. I recommend turning off the sound, as the local radio station in the background gets tiresome.

Cindy Sherman at SFMOMA

The huge Cindy Sherman retrospective at SFMOMA will be closing in a week, and I would be remiss if I did not write a few words about it. Her work, which is almost entirely composed of self portraits, is often described with terms like “masquerade,” “caricature,” “persona”, and her still images lend themselves to the idea of performance and play. I had the opportunity to see the exhibition a few times and found the her use of invented persona and performance inspiring as my own work in both music and visuals moves in that direction.

While much of the attention has focused on Sherman’s more over-the-top and exaggerated portraits, I found her early Untitled Film Stills to be among the most compelling. In these pieces, she successfully transforms herself into realistic roles and characters that one might see in films of the 1960s and 1970s.


[Cindy Sherman, Untitled Film Still #21. 1978; gelatin silver print; 7 1/2 x 9 1/2″ (19.1 x 24.1 cm); The Museum of Modern Art, New York, Horace W. Goldsmith Fund through Robert B. Menschel; © 2012 Cindy Sherman  Source: San Francisco Museum of Modern Art]

The transformation from her real appearance and character into these fictional roles through costuming, makeup and expression is already apparent, and one would not think they are all the same person if seen outside the context of the exhibition. It is the realism coupled with black-and-white that makes these portraits stand out from the rest of her body of work. There was also one particularly interesting series of images documenting the Sherman’s transformation from her everyday self into one of the characters.

One the other extreme are some of her more recent portraits, depicting female archetypes from contemporary society as well as a series devoted to aging “society women”. She uses the same elements of clothing, hair, make-up, setting and pose as in the earlier images, but here the effect is to make these everyday tools of beauty and personal identity into something strange. Some results of beautifully exaggerated, others veer towards the grotesque. But in all of these pieces there is a deliberate falseness to the facades and personae.


[Cindy Sherman, Untitled #463, 2007-08; chromogenic color print; 68 5/8 x 6″ (174.2 x 182.9 cm); courtesy the artist and Metro Pictures, New York; © 2012 Cindy Sherman. Source: San Francisco Museum of Modern Art.]

Once again, these images suggest performance, ranging from burlesque to reality television to more experimental performance art where the visitor is confronted with this exaggerated form of human appearances and has to figure out how to interact with her.

Another take on fictitious persona can be found in her history series from 1988-1990. Here, she uses the same elements to recreate scenes either directly referencing or suggesting historical works of Western painting. She transforms herself into the a variety of women as well as a few men that one might see in paintings from the 17th and 18th centuries.


[Cindy Sherman, Untitled #193, 1989; chromogenic color print; 48 7/8 x 41 15/16″ (124.1 x 106.5 cm); courtesy the artist and Metro Pictures, New York; © 2012 Cindy Sherman. Source: San Francisco Museum of Modern Art]

In some cases, they are quite convincing, while in others they are once again deliberately exaggerated through the addition of prothetic facial elements, lactating breasts, as so on. There was even one portrait that at least to me looked more like a Klingon from Star Trek than a European aristocrat.

Not everything in this exhibition was playful. A few of the characters were clearly meant to be battered or abused women. And entire room was devoted the period in the 1980s when she moved away from self portraits into more abstract pieces. This was the height of the AIDS epidemic and these images portraying dismembered bodies and rotting flesh were very difficult to look at.

Finally, in a nod to the focus on digital technology of San Francisco and SFMOMA, Sherman presented a wall-to-ceiling site-specific mural that used Photoshop rather than traditional techniques to alter her appearance. In the piece, we see her larger than life in a variety of characters, the most memorable had her in long hair and long flowing dress, more reserved than in her later photographic portraits. The use of Photoshop also is a reminder of how the ideas of invented personae is more accessible to more people than ever before.

As I said in opening, this exhibition was an inspiration as I move into more invented personae and theatrical performance in my own work, whether in music, video or photography. It is more of indirect influence through the mechanics and discipline of her production and the idea of the characters and transformation, rather than a desire to specifically emulate what she does. In that sense, the timing could not have been better.

Cindy Sherman will remain at SFMOMA in San Francisco through October 18. If you are in the Bay Area and have not yet seen it, I recommend doing so. The exhibition will next travel to the Walker Art Center in Minneapolis and then onto Dallas.

CatSynth video: Vincent and iPad Impaktor synth

From Aaron Apter on YouTube, submitted by both Ville Väisänen via our Facebook page and Veronica Pejril via Twitter.

My cat Vincent is actually a synthesizer. A fluffy, orange synthesizer. I’m using Impaktor, which captures Vince’s acoustic impulses and uses them to excite various sound modules. With the aid of my iPad, Vinny and I kick out some jams. For more info on my other iOS music ventures, visit www.aaronapter.com

Watch the video to the end to see how Vincent feels about this project.

Weekend Cat Blogging: Luna and Kitty Grass

With a major performance safely behind us, and a whole week until the next one, this weekend is an opportunity to catch up on enjoying simple things. For Luna, that means enjoying some kitty grass.

Luna loves her kitty grass, as we have posted before. But’s been a while since we featured it here on CatSynth.

We recently found that one of our local grocery stores is once again carrying the Rosy’s, the brand of kitty grass featuring a cat that looks just like Luna. As if it was made especially for her.

This photo was taken with the “Foodie Pak” lens, film and flash presets on the iPhone Hipstamatic app. Although it was originally designed for photographing delectables from urban food trucks and late-night pop-up stands, we thought it would work well for a feline treat.


On the topic of food and cats together, Weekend Cat Blogging #381 is hosted by the tabbycats in Vienna Kashim, Othello and Salome at PaulChens FoodBlog?!

The Carnival of the Cats will be up tomorrow at Mind of Mog.

And the Friday Ark is on hiatus this week.