## Wednesday, December 30, 2009

Collections
Amino acids, squared.
Full tilt

The winter solstice was just a few days ago. And, it rhymes with lattice.

## Tuesday, July 21, 2009

A fundamental truth

It is what it is - see also: It was what it was

As a consequence, it will be what it will be.

## Wednesday, May 27, 2009

Book

ISBN-10: 0979777747
1 = sin(x) + cos(x)

1 = C/C (C ≠ 0) =>
1 = (1/C)*(C*sin(x) + C*cos(x)) =>
1 = (1/C)*(cos(a)*sin(x) + sin(a)*cos(x)) if C = sin(a) = cos(a)
=> 1 = tan(a)
=> a = π/4 as a possible solution
=> C = 1/sqrt(2)
=> 1 = sqrt(2)*(sin(x + π/4)) or 1/sqrt(2) = sin(x + π/4)

## Friday, March 20, 2009

Again, it is time for some equinox.

## Wednesday, March 04, 2009

The answer to "what makes something/someone be ..." is looking for symptoms, not causes; the answer to "what makes something/someone do ..." is looking for causes, not symptoms. For example, the answer to "what makes someone retarded" could be "low frustration tolerance" as opposed to "hitting your head against a wall too many times". The latter could indicate an initially high frustration tolerance, which then gradually lowered. For other symptoms, such as a tendency to acquiesce to the expectations and desires of others, see Switzky/Greenspan, "What is Mental Retardation?" [Google Book].

## Tuesday, February 24, 2009

Probability
The conditional probability P(x|y) is the probability of some event x given the occurrence of some other event y.
The marginal probability P(x) is the unconditional probability of some event x.
Bayes' theorem states that P(x|y)*P(y) = P(y|x)*P(x) = P(x ∩ y).
See the wikipedia article for details.

See also: Sklar's Theorem about copulas, as well as the wikipedia article. A copula combines the marginal, univariate distributions of a multivariate distribution into that multivariate distribution.

## Tuesday, February 17, 2009

Sharing

Sharing (memory) is evil the enemy of scalability.

## Monday, January 12, 2009

CWE-609

Double-Checked Locking - a common weakness, enumerated. The complete list can be accessed here.