archives

Date

Laptop Macgyvering

Thanks for the email on the spam bots Mark. They're insidious. I turned off all anonymous posting. I will post more on general enzymind stuff later.

Web predictions

 TED Video which speculates on the next 5000 days of the web. Infers connections between web and brain strucutre interconnectivity.

Also a nice fluid dynamics video of experiments being done on the interntational space station in micro gravity.

Diffraction limit

Stumbled upon a video clip demonstrating 'structured illumunation' microscopy which gives a 2x increase in optical resolving power past the usual diffraction limited 200nm feature size dictated by 1/2 wavelength of the smallest visible light ~400nm. It uses compuational image processing of moire patterns created by illuminating the sample with 2 or more gratings at various offsets to each other.

Notes on photography 6/28/08

6/28/08 Bridge Thin photography

Doug Heiken and Mark Dow spent a half day taking video and stills of the Bridge Thin parcel (http://www.wikimapia.org/#lat=44.1654519&lon=-122.3126686&z=17&l=0&m=h&v=2). Warm sunny day.

10:10 Left Mark's house.

10:40 Diversion point for the Walterville Canal (http://www.wikimapia.org/#lat=44.0766565&lon=-122.7646637&z=17&l=0&m=h&v=2). (photo 18 mm, Canon SLR)

11:12 Blue River Resevoir turnoff (http://www.wikimapia.org/#lat=44.1650594&lon=-122.2898698&z=17&l=0&m=h&v=2).

2x2 symmetric L-systems

2x2 symmetric L-systems

"Symmetry is a complexity-reducing concept; seek it everywhere." Alan Perlis

   The simplest 2x2 replacement systems with rules that are globally and locally symmetric.
   
    Many other types of systems also have a large number of symmetries, for example:

Engineering and constructing meso-scale redundant materials

How do you rationally design and make materials that have highly organized micro-structure. Periodic and pseudo random structure occurs in many naturally formed materials, but not necessarily at the desired scale, or with a specific repeated unit or material. Non-periodic but deterministic structure is less common in non-living physical systems, but is the rule for living systems.

Growth and form are often locally rule based in living systems and globally rule based in non-living systems.

Bridge Thin photography

Doug Heiken and I took some video and still photos of forest land near the Blue River Resevoir, OR, that will be thinned, with the intention of re-photography after the thin. These are related notes and materials.

A 90 year old forest of mostly Douglas fir that was naturally established after fire about 90 years ago. This area will be thinned as part of the Bridge Thin timber sale, probably in late 2008 or 2009. The prescription is 17 foot "designation by description." Unit 82 and part of unit 80 are included in the polygon (see below).

Human brain surface model comparisons

Human brain surface model comparisons

    In the process of making a reasonably accurate bronze cast of a human brain, I came up against the limitations of polygonal surface models. In particular it is difficult to generate a highly detailed and topologically correct polygonal mesh from high resolution (~1mm)  MRI volume data.

    This is just a visual comparison between renderings of brains, using both volume rendering and polygonal mesh surface rendering techniques.

Alan Kay and childhood education

I've been reading a lot of material developed by Alan Kay (e.g. his writings), and others who have been influenced by Kay's vision of what operating systems and software should look like to create a revolution in the way people, in particular children, learn.

Gallery glitches

Was having some techical difficulties with the enzymind gallery. Did some web server voodoo and all is fine now.