Monday, December 10, 2007


HaloSim3 Software
HaloSim. It may be freely downloaded.

It creates simulations by accurately tracing up to several million light rays through mathematical models of ice crystals.

HaloSim3 is the result of a transatlantic collaboration by Les Cowley and Michael Schroeder.
Simulations can be run immediately. Select from ready to run simulations of common and rare halos with text descriptions.

Crystals. Halos from all crystals are simulated; hexagonal plates, columns, pyramidals and non water-ice crystals which might be found in other planetary atmospheres.

All halos simulated. All the possible light paths through crystals are sampled, hence all halos for a given solar altitude and crystal type/alignment are simulated.
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As interactive designers and developers, we often build features with a foreground and a background where the content for the foreground is created by the user. We design the background or the environment.

If the foreground is considered in focus, the background might be considered out of focus. It is the context for the content.

Focuso is the art and philosophical aspect of out of focus or Focus out - Focuso. In particular, it can be demonstrated by photographs that are purposely out of focus for artistic reason.

Book of Optics
The Book of Optics (Arabic: Kitab al-Manazir, Latin: De Aspectibus) was a seven volume treatise on optics, physics, anatomy, mathematics and psychology written by the Iraqi Arab Muslim scientist Ibn al-Haytham (Latinized as Alhacen or Alhazen in Europe) from 1011 to 1021, when he was under house arrest in Cairo, Egypt.
The book had an important influence on the development of optics, and science in general, as it drastically transformed the understanding of light and vision, and introduced the experimental scientific method. As a result, Ibn al-Haytham has been described as the "father of optics", the "pioneer of the modern scientific method", and the "first scientist".[1]


Bradley said...

Thank you for bringing attention to Ibn al-Haytham’s contributions to the field of optics. Not only did he solve the mystery of vision and accurately describe the propagation of light, but by insisting on systematically testing hypotheses with experiments, he earned a place in history as the first scientist. If your readers would like to know more about him, I recommend the new book, Ibn al-Haytham: First Scientist, the world's first biography of the eleventh-century Muslim scholar known in the West as Alhazen or Alhacen.

Marcia Lyons said...

Hi Bradley!

Sorry for the delay to thank you for your recommendation for the First Scientist book by Ibn al Haytham- we only just noticed your comments we've been so busy gathering research around this idea. We will definitely get the book and pass it along to others! Cheers, Marcia