"We act as though comfort and luxury were the chief requirements of life, when all we need to make us happy is something to be enthusiastic about."
The computer program is one of humanity's highest forms of imagination (to some, art), a confluence of logic and symmetry that, at its best, can make a lifelong impression, convey our deepest thoughts, make us laugh, or rally an economy. It transcends the programmer and attains a life of its own.
paraphrase of Bill
PC Magazine Sept 1, 1998 by Bruce Price
Publicly Available Programs
|Program for computing and graphing the atomic energy levels structure of any atom (neutral or ion) in the periodic table in the local density formulation. Includes relativistic corrections using first order perturbation theory. Capable of generating potentials for electron and x-ray diffraction. Operates on the same principles as the classic Hartree-Fock-Slater program of Herman and Skillman.|
|An example of an interactive molecule viewer. Capable of handling small or very large molecules (1-1,000,000 atoms), ball-and-stick models, potential energy surfaces, and stereographic projections with red-green glasses.|
documents the development of the first device capable of performing
electron diffraction on charged molecules that are trapped in an
oscillating electric field. Molecular structure can be probed by
diffraction while mass can be selected by the trapping electric fields.
This technique has been used to study the structure of salt clusters (external link).
|A study of gas phase ion-molecule reactions at thermal collision energies performed in a Paul trap. Experiments focusing on C60 suggest it distributes charge non-uniformly.|
Thesis: Experimental and Theoretical work on metallic particles
Spectroscopic Probes and Theoretical Models of Gas Phase Structure
Detailed observations of the quantum mechanical behavior of small metal particles, including explainations of the computational modeling of that behavior using models of distorted spheres.
Talks and Presentations:
- Simulation and Signal Processing in Science
'How a scientist uses a computer'
USGenomics Corporation 9/30/2004
- Electrons Trapped in Metal Clusters
Rowland Institute for Science 8/10/1995
- Gas Phase Structure of Silver Clusters
University of Pennsylvania, Pennsylvania State, University of Georgia
- Free Electrons in Icosahedral Clusters
Northwestern University 1/17/1992
- Metal-Rare Gas Clusters
Northwestern University 6/21/1991
- Mean Field Quantization of Several Hundred Electrons (Bjornholm)
Northwestern University 1/24/1991
- Sm, Yb, Eu Clusters
- Many Body Theory: Green's Functions and Feynman Diagrams
Northwestern University 8/1990
- Density Functional Theory (chalk talk)
Northwestern University 1/26/90
"What I see in Nature is a magnificent structure that we can comprehend only very imperfectly, and that must fill a thinking person with a feeling of humility. This is a genuinely religious feeling that has nothing to do with mysticism."
"The World As I See It" by Albert Einstein
"How strange is the lot of us mortals! Each of us is here for a brief sojourn; for what purpose he knows not, though he sometimes thinks he senses it...."
"There is no subject, however complex, which, if studied with patience and intelligence will not become more complex."
D. Gordon Rohman
Extra-biblical Apocryphal and Pseudepigraphal Literature
See you now, your bait of falsehood takes this carp of truth:
And thus do we of wisdom and of reach,
With windlasses and with assays of bias,
By indirections find directions out."
Hamlet, II, i
"Men have become the tools of their tools..."
"What makes planets go around the sun? At the time of Kepler some people answered this problem by saying that there were angels behind them beating their wings and pushing the planets around in orbit. As you will see, the answer is not very far from the truth. The only difference is that the angels sit in a different direction and their wings push inwards."
The Character of Physical Law (1965)
Science is a technique to keep yourself from kidding yourself.
Edwin H. Land
In the long run, evolvability is more important than fitness.
And our genes are set not only to survive, but to evolve.
Entropy is a state of knowledge, not a state of matter, as such it belongs squarely to information theory not to thermodynamics. Contrary to many teachings on the second law of thermodynamics and popular statements referring to the 'entropy of the universe', entropy is an expression of logic when knowledge is incomplete. It is equivalently a statement about 'reproducibility', but it is not a physical theory. The universe does not 'tend to disorder', but our ability to predict its future tends to become less precise the longer our prediction.
This common misconception, a confusion of randomness with incomplete information, has been around since the time of Ludwig Boltzman. As early as 1875, Gibbs tried to correct the confusion, and Planck complained the misconception was 'impossible to eradicate'. Unfortunately, the true meaning of entropy has only been assimilated as slowly as Darwin's theory of evolution.
See for example 'A Backward Look to the Future', E. T. Jaynes
or the more technical 'The Second Law as Physical Fact and as Human Inference', E. T. Jaynes. [All from the E. T. Jaynes bibliography.]
Claude E. Shannon's, 'A Mathematical Theory of Communication' indirectly touches on this topic.
S = k log( W ) Boltzman's epitaph
Douglas B. Cameron.
Last revised: February 20, 2003.
suggestions are encouraged: