 | Last login: 15 hours agoThomas is a 42 year old married guy from Denver, Colorado, USA. When I was a kid, I wanted to be Mr. Spock from Star Trek.
I studied astrophysics in college for 15 years, but, hard as it is
for me to admit it, I like studying algorithms and writing computer
programs at least as much as I like physics and astronomy. In any
event, I can make more money writing computer programs, and so that's
what I do for a living. In the aerospace industry, I write software
that controls and simulates star trackers.
While I was in college, I ran into a woman who was also studying
physics. She ended up wanting to be a home-maker and a teacher in the
home even more than she wanted to study physics and math. We are
married and have seven children.
In the early 1990s, I discovered the GNU operating system based on
the Linux kernel. I have been a proponent of free software ever
since.
In the late 1990s, my wife and I, who were nominally Catholic, became
actually Catholic. The Church continues to be much more interesting,
reasonable, and challenging than I ever realized when I was younger. As
a result of my conversion, my conscience has dictated that I leave the
Democratic Party, which seems not to understand the difference between
freedom and license. The so-called right to abortion (killing) of
unborn human beings is just the grossest feature of the problem. So now
I'm independent of party affiliation.
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- Math Forum - Ask Dr. Math
Jul 4, 5:05pm  (1 review) mathematics http://mathforum.org/library/drmath/view...- From the page:
We have the infinite series:
S = 1/1 + 1/2 + 1/3 + 1/5 + 1/7 + 1/11 + 1/13 + ... 1/p(n) + ...
where p(n) = the nth prime.
Is S convergent or divergent? Why?
- The Kernel Newbie Corner: Your First Loadable Kernel Module
Jul 2, 12:33pm  (1 review) operating-systems http://www.linux.com/learn/careers-train...- From the page:
This is the first in a series of articles aimed at the beginning kernel
programmer, designed to lead the kernel newbie through the basics of
writing and compiling their first kernel module, and getting
increasingly sophisticated from there. Everything that will happen in
this space is meant to be fully hands-on, and you're all welcome to play
along.
- Inflatable Tower Promises Easy Access to Outer Space: Discovery News
Jul 2, 9:44am     (6 reviews) science http://dsc.discovery.com/news/2009/07/02...
From the page:
An inflatable tower nine miles tall and tethered to a mountain top could
cut the cost to launch spacecraft, reduce the need for geostationary
communications satellites, and improve cell phone signals.
This thing or something like it could also provide a test-bed for
technologies related to a space elevator. For years, I've been thinking
that if the space-elevator folks are serious, then they would want to
immediately start building tethered, high-altitude balloons or kites
where a steady stream of high-altitude air can provide lift. An
inflatable, buoyant tower could also provide ways to test long tethers
under load.
- Skeptical Christian
Jul 1, 7:09pm    (54 reviews) christianity http://www.skepticalchristian.com/- I am skeptical of "The Skeptical Christian".
For example, the advertisement that reads, "Make poverty history."
That's like, "Make the broken world unbroken." Although we should realize that poverty involves real suffering and ought to prompt works of charity, we should not be tempted into thinking that poverty (or any other reflection of the deep brokenness of the universe) could ever be eradicated by us.
Nevertheless, the site seems to contain some interesting material.
- What is the difference between a DC motor and servo motor? - The Handy...
Jun 30, 4:22pm   (1 review) robotics http://handyboard.com/hb/faq/hardware-fa...
From the page:
If you switch the power on and off fast enough, then it just seems like
the motor is running weaker--there's no stuttering. This is what PWM
means when referring to DC motors. The Handy Board's DC motor power
drive circuits simply switch on and off, and the motor runs more slowly
because it's only receiving power for 25%, 50%, or some other fractional
percentage of the time.
A servo motor is an entirely different story. The servo motor is
actually an assembly of four things: a normal DC motor, a gear reduction
unit, a position-sensing device (usually a potentiometer--a volume
control knob), and a control circuit.
The function of the servo is to receive a control signal that represents
a desired output position of the servo shaft, and apply power to its DC
motor until its shaft turns to that position. It uses the
position-sensing device to determine the rotational position of the
shaft, so it knows which way the motor must turn to move the shaft to
the commanded position. The shaft typically does not rotate freely round
and round like a DC motor, but rather can only turn 200 degrees or so
back and forth.
The servo has a 3 wire connection: power, ground, and control. The power
source must be constantly applied; the servo has its own drive
electronics that draw current from the power lead to drive the motor.
The control signal is pulse width modulated (PWM), but here the duration
of the positive-going pulse determines the position of the servo shaft.
- The Mr Science Show: Awesome Illusion
Jun 30, 12:45pm     (52 reviews) science http://www.mrscienceshow.com/2009/06/awe...
The "blue" and the "green" are actually the same color. The
difference is an illusion.
- Bug#535192: [iceweasel] New Version of upstream Firefox 3.5 - linux...
Jun 30, 12:41pm (1 review) firefox http://groups.google.com/group/linux.deb...
From the page:
> Firefox 3.5 is going to be released very soon and I wonder if you
> already tried to package the Iceweasel version of it. I could not find
> any Debian packages anywhere.
You're already late in your promptness to demand for version 3.5.
It's already released.
Anyways, it will be in debian when it will be ready.
glandium.org/blog [glandium.org/blog]
- Technology Review: Blogs: arXiv blog: Carbon Ring Storage Could Make Magnetic...
Jun 30, 11:57am physics http://www.technologyreview.com/blog/arx...
- First Electronic Quantum Processor Created
Jun 29, 10:24am (1 review) physics http://www.sciencedaily.com/releases/200...
From the page:
The two-qubit processor is the first solid-state quantum processor that
resembles a conventional computer chip and is able to run simple
algorithms. (Credit: Blake Johnson/Yale University)
- HOMO SAPIENS & Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger...
Jun 24, 1:50pm (2 reviews) humor http://icanhascheezburger.com/2009/06/20...
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