caustics
Caustic (optics)
Caustics made by the surface of water.
In optics, a caustic is the envelope of light rays reflected or refracted by a curved surface or object, or the projection of that envelope of rays on another surface. The caustic is a curve or surface to which each of the light rays is tangent, defining a boundary of an envelope of rays as a curve of concentrated light.
Hiding Images in Plain Sight
An Article by Matt FerraroI recently made a physical object that defies all intuition. It's a square of acrylic, smooth on both sides, totally transparent. A tiny window.
But it has the magic property that if you shine a flashlight on it, it forms an image.
Caustic Engineering
An Article by Geoff ManaughA piece of milled plexiglass acting as a projecting lens; via the Computer Graphics and Geometry Lab at the École Polytechnique Fédérale de Lausanne
New milling techniques applied to glass and plexiglass panels could be used to “create windows that are also cryptic projectors, summoning ghostly images from sunlight.”
[Pauly and Bompas] hope that the technique will be used in architectural design, to create windows that mould sunlight and throw images or patterns onto walls or floors,” which, if timed, milled, and manipulated just right, could produce a slowly animated sequence of images being projected by an otherwise empty window during different times of day.
Architectural Caustics
A Research PaperTo control the shape of a caustic pattern generated by a specular or refractive surface, we need to solve the inverse problem: how can we change the surface geometry, such that incident light is redirected to produce a desired caustic image?
Sermon for WIAD Bristol 2021
The language itself has been weaponized
It’s quite difficult, to fight back against the seeming wisdom of axiomatic “truths,” when the language itself has been weaponized through the power of pattern. Through rhythm, rhyme, alliteration, and consonance.
The last time I was in England was at the invitation of Nomensa, to give a talk at a conference wherein I encouraged the audience to discard an axiom that I feel has done users of the English language more harm than good through endless and glib repetitions.
Like “Curiosity Killed The Cat,” “You Are Not Your User” sounds so good that we keep on saying it, without appreciating what we’re reifying through repetition. The pleasure of repetition, the pleasure of pattern matching, the pleasingness of Kuh Kuh Kuh consonants on the one hand, and of the round vowelly Yuh Yuh Yuh on the other make these things we say seem true because they sound and feel so good to say.
One Of Us
That’s the primary difference between an axiom like “Curiosity Killed The Cat” and an axiom like “You Are Not Your User. ” The former rings true in common experience. It’s test-able, like striking a tuning fork or dangling a bit of yarn in front of a kitten. The latter is just some stuff that somebody said.
Sometimes, axiomatic sayings like “You Are Not Your User” no longer have a who that’s saying them. They cease being an actual instruction, and instead serve as a kind of identity, to identify the person who’s repeating the axiom as One Of Us.
The technical term for when an axiom devolves into an ID card is shibboleth: a custom, principle, or belief distinguishing a particular class or group of people, especially a long-standing one regarded as outmoded or no longer important.
You and your user are one
In the case of the seeming egalitarianism and beneficence of the voice from the cloud that says “You Are Not Your User,” what I hear in that voice is the ringing of a cash register, and the creaking of the crank on the side of a box that software development efforts disappear into, and that money comes out of.
A mechanism that would seize up instantly if some still small voice were to propose the opposite of what the thunder says: that you and your user are one.