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?
Gods of the Word
Imagine that we had no voice and no tongue
Socrates: Imagine that we have no voice and no tongue, but want to communicate with one another. Wouldn’t we like the deaf and the dumb make signs with the hands and the head and the rest of the body?
Hermogenes: There would be no choice, Socrates.
Socrates: We would imitate the nature of the thing: lifting the hands to heaven would mean lightness and upwardness. Heaviness and downwardness would be expressed by letting them drop toward the ground...
Hermogenes: I don’t see that we could do anything else.
Socrates: And when we want to express ourselves with the voice or tongue or mouth, the expression is simply their imitation of what we want to express?
Hermogenes: I think, it must be so.My name
“I am the utterance of my name.”
— Thunder, Perfect Mind, The Nag Hammadi Library
Reference and Is-ness
There are at least two aspects to what we have traditionally called the meaning of a word. One aspect is reference, and the other is something I will call ‘inherent meaning’ following Ullman (1963). Inherent meaning is ‘Is-ness’ meaning. Inherent meaning is a word’s identity, and reference merely its resumé, where it has gone and what it has done, an itemization of its contexts. ‘Is-ness’ is unifying. Each word has a single pronunciation, a single inherent meaning. But reference is divisive. It makes what was one thing – the word – appear to be many things – its senses. It is inherent meaning which gives all those multifarious senses the power of being a single word.
It flows out and fills
This deeper meaning of a word isn’t confined to what we think of as a dictionary definition. Rather it flows out and fills all the space available to it. Although a basic sense does affect the dynamics of a word, it has no power over its essence. Like the captain of a ship, it can control the crew’s actions, but not their minds. Each word has an aspect of meaning which lies deeper than any of its senses, and it is fundamentally on this meaning that all the senses depend.
No less than a Zeus
I too am a true believer in the autonomy of the archetype. A
/t/
or an/h/
is no less than a Zeus. The consonants are not essentially physical, but they live, evolve and influence human affairs. We overlook something essential if we deny that they can get up and walk around. This is not to say that their existence is independent of the human psyche. But then everything depends on everything.Like a prism
When you look at phonemes, you look through the perspective of morphemes, which are one linguistic level higher. The higher level is like a prism that splits the light in two. What was one thing, like ‘length’ at the phoneme level, looks like two opposite things ‘long’ and ‘short’ from the perspective of the morphemes. In practice, when you find both a word and its opposite, then the phoneme is not about either of these two things, but about what is common to them.
Fracturing
If we step back and view from afar this process of One-ness and Is-ness to fracturing and interpretation – of inherent meaning to reference, it follows that what lies at the foundation of language is simply what it is – sound – free of reference and interpretation. What makes what we know as language from its sound is fracturing and interpretation or using a word for a function other than what it simply is.
To evolve the language itself
So in the process of talking, we might say we are putting words in slightly new contexts, and then testing them against our peers to see if our experiment in juxtaposition had ‘meaning. If we succeed, we have introduced new contexts for the words we use. These contexts will be taken up by our listeners, and will gradually become clearly enough defined to be thought of as referents. Once our words gain new referents, they start affecting the underlying phonosemantic structure of the language, the clustering patterns, the network of semantic relations. That is, the purpose of talking in the long run is to evolve the language itself.
Scooting over
There is at this point no evidence that acquired characteristics can be inherited. It is held that all changes to a genome are random, and cannot be subject to any higher principle. However, when a word is used in a new context, as it is whenever we say something new, a new sense is permitted. This does affect the phonosemantic structure, the linguistic DNA. Words in the vicinity of this word ‘scoot over’ to make room and allow themselves to be influenced by its philosophy. The language itself is now different.
The element becomes a sign
Each unit can be seen purely as form, as what it is. Or it can be viewed as having a function. Its function is only understandable within the next higher level of organization. And in every case, function must succumb to the constraints of form. Once this worldly function is assigned, the element becomes a ‘sign’. It falls into the realm of concept. There is a mapping from one thought system to another.
The demand of a new word
Why are these phonosemantic classes enough, and we need neither more nor less? Why are these consonants enough, and we need neither more nor less? What determines the need for a new word? How is this demand ‘felt’ by a language? How did the metabolic pathways of American English recognize that ‘jerk’ and ‘twerp’ and ‘punk’ and ‘nitwit’ and ‘dork’ and ‘ass’ and ‘goon’ and ‘twit’ and ‘dodo’ and ‘bum’ and ‘nerd’ and ‘dunce’ and ‘turd’ and ‘boob’ and ‘chump’ and ‘bitch’ and ‘bastard’ and ‘prude’ and so on and so forth simply were not equal to the task? We had to add ‘turkey’ and ‘squirrel’ as well?