Profile

Cover photo
David Joyner
Works at USNA
Attended Georgia Institute of Technology
Lives in arnold, md
8,176 followers|521,843 views
AboutPostsPhotosYouTubeReviews

Stream

David Joyner

Shared publicly  - 
 
If this weren't true it would be funny. From slashdot.
ferrisoxide.com writes: A paper co-authored by researcher fellow Dr. Fiona Ingleby and evolutionary biologist Dr. Megan Head — on how gender differences affect the experiences that PhD students have when moving into post-doctoral work — was rejected by peer-reviewed PLoS Onebecause they ...
7
Alan Light's profile photoDavid Joyner's profile photoMs Kat's profile photo
9 comments
Ms Kat
 
+Alan Light You seem to be a MRA so I'm not going to bother discussing anything with you, except to say I don't live in America so none of the examples you've given of legislation mean anything to me. But anyway, bye.
Add a comment...

David Joyner

Shared publicly  - 
 
Cool mate-in-2, care of futilitycloset.com:
4
Ondřej Čertík's profile photo
 
Interesting, took me a while to figure out.
Add a comment...

David Joyner

Shared publicly  - 
 
Interesting statistical analysis of chess over the last 200 years.
Randy Olson analyzes over 650,000 chess tournament games to explore how chess has evolved over time.
5
Robert King's profile photoOndřej Čertík's profile photoDavid Roberts's profile photoDavid Joyner's profile photo
10 comments
 
+Ondřej Čertík sounds good. I'll email you separately 
Add a comment...

David Joyner

Shared publicly  - 
 
Easter joke:-)
John Deering's "Strange Brew" is just what the title says -- a mix of strange and humorous observations.
6
2
Luke Seymour's profile photoElizabeth Petit's profile photo
Add a comment...

David Joyner

Shared publicly  - 
 
Elizebeth Friedman was one of America's greatest cryptographers in the early- to mid-1900s. She worked during the Prohibition era for the Department of the Treasury and the Coast Guard and, at various times during World War I and World War II, for the War Department. This monograph concerns her personal life and professional work for the Coast Guard on liquor and narcotics smuggling, up to the late 1930s.

The book is out now: Divine Fire on amazon.com, for about $5. More precisely, it is priced at 1 penny above the minimum amazon.com cost. I think if you go to createspace.com you can buy it even cheaper, but shipping costs might be different. 
3
1
Helger Lipmaa's profile photo
Add a comment...

David Joyner

Shared publicly  - 
 
Interesting article on gender differences.
How do teen math prodigies from the 1970s view success at mid-life? The answer differs according to gender.
5
2
Ondřej Čertík's profile photoDavid Joyner's profile photoHelger Lipmaa's profile photoBennet Yee's profile photo
2 comments
 
I just read it as a statistically study of what men vs women view as success.

Better math education can't hurt though:-)
Add a comment...

David Joyner

Shared publicly  - 
 
Registration is now open for the 5th annual Kryptos Competition:

KRYPTOS5: A Series of Cryptanalysis Challenges

April 16 – 20, 2015

KRYPTOS5 is a contest open to undergraduate students.  The theme of the contest is centered around the breaking, or cryptanalysis, of ciphers (secret writing). Each challenge presents contestants with a brief scenario together with some ciphertext (encoded message). The goal is to discover the original English plaintext message!

Clues to help break the cipher may be contained in the actual ciphertext or in the details of the accompanying scenario.

While it is not the intent of this contest to test overly technical aspects of cryptanalysis or advanced mathematical algorithms, some familiarity with basic codemaking and codebreaking is certainly helpful. Some useful sources include:



Challenges from last year's contest.
The American Cryptogram Association.

Wikipedia entries for Cryptography and Cryptanalysis
The Code Book by Simon Singh.
Secret History: The Story of Cryptology by Craig Bauer
Codes and Ciphers by R.F. Churchhouse
Codes, Ciphers and Secret Writing by Martin Gardner

We had nearly 100 students participate last year and many have been clamoring for more!  Please announce this contest to your students!  Cool prizes are sent out to first and second place winners!

Visit: http://www.cwu.edu/math/kryptos/ for more information -- including instructions on registering students for the contest and a one-page flyer that you can post around your department or campus.

Thank you,

Stuart Boersma , Central Washington University
Cheryl Beaver, Western Oregon University
 

KRYPTOS is sponsored by the Pacific Northwest Section of the Mathematical Association of America together with Central Washington University and Western Oregon University.
1
1
Kevin O'Bryant's profile photo
Add a comment...
Have him in circles
8,176 people
Jonathan Taylor's profile photo
John Chumack's profile photo
Jen Davison's profile photo
Gorica Tasic's profile photo
Jaime Stark's profile photo
George Strayton's profile photo
elias moh's profile photo
Daniel Shamaun's profile photo
Brandon L. Holman's profile photo

David Joyner

Shared publicly  - 
 
Fascinating and clever post on sestinas:-)
The sestina is an unusual form of poetry: Each of its six stanzas uses the same six line-ending words, rotated according to a set pattern: This intriguingly insistent form has appealed to verse writers since the 12th century. “In a good sestina the poet has six words, six images, six ideas so urgently in his …
2
Add a comment...

David Joyner

Shared publicly  - 
 
A walk in the woods with Charlie Graf, 2015-04-04. Arnold, MD. Taken with a gh4.
1
Add a comment...

David Joyner

Shared publicly  - 
 
Rubik's cube humor:-)
John Deering's "Strange Brew" is just what the title says -- a mix of strange and humorous observations.
6
2
David Roberts's profile photoErno Rubik's profile photoDavid Hallowell's profile photo
 
+Erno Rubik​, seen this?
Add a comment...

David Joyner

Shared publicly  - 
 
Elizebeth Friedman biography, "Divine Fire" is out
In previous posts on this blog (for example, Elizebeth Friedman and the Lew Kim Yuen case , Elizebeth Friedman and the Gordon Lim case , Elizebeth Friedman and the Holmwood case , and so on), I'm mentioned some of the events in Elizebeth Friedman's life. Th...
1
1
William Rutiser's profile photo
Add a comment...

David Joyner

Shared publicly  - 
 
I finally finished LaTeXing Lester Hill's paper (from the 1920s?) when he discovered error-correcting codes (which he called error-detecting codes, since he did not realize when they were). Essentially, he discovered (about 20 years before Hamming and Golay) cyclic MDS codes without knowing it, and never published his notes. 
5
6
Helger Lipmaa's profile photoPunarbasu Purkayastha's profile photo
Add a comment...
People
Have him in circles
8,176 people
Jonathan Taylor's profile photo
John Chumack's profile photo
Jen Davison's profile photo
Gorica Tasic's profile photo
Jaime Stark's profile photo
George Strayton's profile photo
elias moh's profile photo
Daniel Shamaun's profile photo
Brandon L. Holman's profile photo
Education
  • Georgia Institute of Technology
    math
  • University of Maryland, College Park
    math
Basic Information
Gender
Male
Story
Tagline
math, writing, tech, edu, ...
Introduction
Enjoy tinkering with mathematics, writing, Sage (www.sagemath.org), video, chess, and photography. Interested in math education-related and open-source software issues.
Bragging rights
have managed to stay off facebook
Work
Occupation
math prof
Employment
  • USNA
    math prof, present
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
arnold, md
Previously
mountain view, ca - kent, wa - decatur, ga - princeton, nj - san diego, ca
Links
I have used All for the Pet for years and never once had rude service. The store doesn't even open until 9am and Lisa often comes in early to help out people who want to drop off their pet before going to work. I think she does a good job with my pets and her prices are reasonable.
Public - a year ago
reviewed a year ago
1 review
Map
Map
Map