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Science
is built up of facts, as a house is built |
Cybersecurity! |
Alternate
address for this page: Ask-Backward
Statistics! |
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ANNOUNCEMENTS |
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This page is dedicated to the 40
passengers and crew members of United Airlines Flight 93. Additional information . . .
Students: Abbreviations are here.
Alumni: Please click here.
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2015-16 classes: Click one of these |
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Blocks 2,3 |
Block 4 |
Block 6 |
Block 6 (fall only) |
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MH-102 |
MH-102 |
MH-102 |
MH-102 |
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At other times, I am usually in my
office. For more details, please see my contact
information. To locate
other teachers, please check the teaching
schedule, the extra help
schedule, and the STA
timetable.
Welcome
to
Home Page and the Mathematics
of Digital Data
General Information:
How to contact Mr. Hansen
Mr. Hansen’s three rules
Policies concerning absences
Information about Woody (my ancient dog, who died in
July 2002)
Information about Shelby, a.k.a. the Shelbeast, who died in July 2015)
How to decipher those abbreviations you see on your
papers
Fun Links:
The eyeballing game: educational,
fun, and dangerously habit-forming (you have been warned!)
Prime numbers: Researchers have
found new patterns!
Article on Benford’s Law,
an amazing number pattern most people have never heard of
Mathcross puzzles for extra credit (and more Mathcross puzzles)
Elephant’s Wheels puzzles
FloatFloat.com official contest information
Old version of Microsoft Excel contained arithmetic bugs
RSA-576, a $10,000 puzzle, has been solved! Click here for details
(prizes up to $200,000)
The Poincaré
conjecture has been solved! (The winner declined the $1 million prize.
Mathematicians are sometimes a little odd.)
This article
on the Poincaré conjecture ends by saying, “. . . a
really good problem can sometimes be much better than a really good answer.”
Something special
about many of the positive integers from 1 to 9999
Spinning
dancer optical illusion
Some real-life
optical illusions
Extraordinary optical illusions from MIT
(Cambridge, MA) and the San Francisco Exploratorium
More from MIT: Graduate student pranksters use a phony research paper generator in
an astonishing AI breakthrough
Zooming
from 10 million light years away, down to the level of quarks—very, very cool
Angle-arc puzzles created by the Class
of 2006 (in 2003) and the Class of
2007 (in 2004)
The best TV commercial
ever! An article
describes how the ad was shot in 606 takes—all real except for one second of
digital animation.
Jim Loy’s math pages: a huge
collection of mathematical facts, mostly recreational
Mathematical art (“polynomiography”)
Mind-reading program (Can you figure out the
mathematical principle that makes this work?)
Interview
with Bill Gates: how he wrote the operating system for the antique
computers Mr. Hansen collects
How to interface the HP iPAQ 2210 with a
vintage laptop computer
Overconfidence
in the world of investment and elsewhere
Russian vocabulary drill,
version 1.00.00 as of 3/25/2001 (requires Excel 97)
Russian keyboard driver for Windows
95/98
Two-column proof that girls are evil
(Internet lint; author unknown)
Color test (harder than it
looks—but fairly easy on the second try)
Mathematics for code-making and code-breaking at the National
Cryptologic Museum
Someone other than a dead politician finally appears on
currency!
Rules for
depicting computers in movies [courtesy of the nonprofit Washington Apple Pi, Ltd.]
The barometer fable
A mathematical scavenger
hunt
MP3 files (legal!)
Mr. Hansen’s blog (www.zocs.org)
Serious Links:
STA School Handbook
WolframAlpha, an advanced
“computational knowledge engine” for mathematics and quantitative analysis
Mr. Hansen’s blog (www.zocs.org) (I listed it a
second time because it is both fun and serious.)
A Course
in Number Theory for High School Students by David C. Garlock, who taught
this course here at STA in May 2003
Errata page for the math/physics tome The
Road to Reality by Sir Roger Penrose (published by Knopf, 2005)
Philosophy of St. Albans School: 1999
version 2010 version
New
Orleans flooding as predicted in a 2002 newspaper series, more than 3 years
before Katrina
Careers in mathematics
Summer camps for
high school mathematics students
Global Children’s Organization:
volunteer opportunities for students 17 and older
“The
Real Heroes are Dead”: an amazing profile of Rick Rescorla from The New Yorker, 2002 (warning: rough
language)
. . . which serves as a segue to . . .
“. . . [O]nly one thing
worked right in the nation’s defense. According to the final report of the 9/11
commission, it wasn't the FBI, CIA, FAA or Air Force. Not the National Security
Council or the Department of Defense. Not the State Department or Border
Patrol. . . . Only a small band of civilians, strangers to one another . . .
managed to figure out what was going on in time . . . Brave passengers aboard
United Airlines Flight 93 forced hijackers to crash the plane into an empty
field far short of its target.”
— David Von
Drehle, Washington Post staff writer,
page A1, July 23, 2004
Lest we forget, that target
was in the center of our city, most likely the U.S. Capitol. A temporary memorial near Shanksville,
Pennsylvania, paid tribute to the passengers and crew of Flight 93, to whom we
owe an inestimable debt of gratitude. The temporary memorial has since been
replaced by a permanent memorial, which was dedicated on 9/10/2011, the day before the tenth
anniversary of 9/11.
Pages from Previous Years:
--
STAtistics: 1998-99 1999-2000 2000-01 2001-02 2002-03 2003-04 2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
-- HappyCal (Honors AP Calculus BC): 1998-99 1999-2000 2000-01 2002-03 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14
-- The Calculus (AP Calculus AB): 2003-04 2004-05 2005-06
-- IntroCal (Introduction to the Calculus): 2006-07
-- Algebra II: 1998-99 1999-2000 2005-06
-- Geometry: 2000-01 2001-02 2002-03 2003-04 2004-05 2007-08 2008-09 2009-10
-- IPL
(Introduction to Programming Languages): Spring 2011 Spring 2012 Spring 2014
-- AP
Computer Science A/Java: 2012-13 2014-15
-- CFCS
(Coding for Cybersecurity): Fall 2015
--
MODD (Mathematics of Digital Data): Spring 2004 Fall 2005 Fall 2006 Fall 2010 Fall 2011 Fall 2012 Fall 2013
--
Practical Statistics: Spring 2012
-- The Saint
Albans News, for which I was
faculty advisor May 1999–May 2004
-- June 1999 Commencement
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Mathematics Department home page
Return to St. Albans home page
Last
updated: 27 May 2021