Mathblogging.orgRecent Postshttp://www.mathblogging.org/scripts/feed.php2015-02-01T08:10:55-05:00No copyright asserted over individual posts; see original posts for copyright and/or licensing.Mathblogging.org Atom serializerMOOCs Revisitedhttp://www.mathblogging.org/post/1104162015-02-01T00:00:00-05:00Mathematical Association of AmericaDespite this month’s title, I have refrained from writing about MOOCs, Massive Open Online Courses, in this column before now. The initial burst of interest always seemed overdone to me. Now that the enthusiasm has waned, we are beginning to see the emergence of meaningful information about when and how they can be useful.<br /><br />As I argued in my co-authored piece in the AMS Notices, Musings on MOOCs [1], they do seem to hold promise as a source of supplementary material that enables flipped […]I Love Math And I Hate The Fields Medalhttp://www.mathblogging.org/post/1104142015-02-01T00:00:00-05:00Mathematical Association of AmericaBy Cathy O'Neill<br /><br />I’ve loved math for as long as I can remember. When I was five I played with Spirographs and learned about prime numbers, and in high school I solved the Rubik’s cube with group theory. Gorgeous stuff! Inspiring!<br /><br />In college, I was privileged to learn algebra (and later, Galois theory) from Ken Ribet, who became my friend. He brought me to dinner with all sorts of amazing mathematicians: Serge Lang, J. P. Serre, Barry Mazur, John Tate, his Berkeley colleagues Hendrik Lenstra […]Knot Necklacehttp://www.mathblogging.org/post/1104132015-01-31T23:32:01-05:00gili17Knot theory is the study of mathematical objects called knots that behave like 3D or 2D closed circular paths. Knot theory has many fascinating problems that can be easy to state, but that can become relatively complex to solve. Try looking at this example: it is a knot on a necklace that I found a […]Where Hard Meets Easyhttp://www.mathblogging.org/post/1104122015-01-31T23:20:52-05:00PipSome hard to compute functions are easy modulo a number Georgia Tech source Joseph Ford was a physicist at Georgia Tech. He earned his undergrad degree here in 1952, and after earning his PhD at Johns Hopkins, went to work for two years at Union Carbide in Niagara Falls before joining the University of Miami […]Linkagehttp://www.mathblogging.org/post/1104112015-01-31T22:17:46-05:00UnknownDid you know...... that Bernard Chazelle's son directed a film that has been nominated for a best-picture Oscar? (G+)<br />... that the rebellion in Ukraine has caused many scientists and whole universities to move? (G+)<br />... that there have been many recent papers on counting geometric incidences? (G+)<br />... that the shape of a piece of 3d-printed chocolate might influence its flavor? (G+)<br />... that placing precise slits in a flat paper surface can cause it to curve in predictable ways? (G+)<br />... that the
[…]Delicious Lessons in Calculushttp://www.mathblogging.org/post/1104102015-01-31T21:53:04-05:00napmathI gave a Calculus workshop. The conference was full of hands-on math workshops for teachers, mostly from the city of Chicago – amazing teachers! I was asked to give a hands-on workshop for pre-calculus/calculus teachers and immediately thought of volume … Continue reading →Homeschool Math, Dboyz Playing Pascal with Base Ten Blockshttp://www.mathblogging.org/post/1104092015-01-31T21:03:00-05:00Crewton Ramone's Blog Of Math<br />Here are a few recent vids. The point of them and this post is to illustrate and bring home basic concept number three: we form rectangles to facilitate counting. Rectangles make it easy to count and we can reduce many seemingly complex math problems to basic counting with the help of our friend the rectangle. In the first vid they make percentages EASY by using a rectangle. <br /><br /><br />What basic concepts do you see in these three vids?<br /><br /><br /><br />Rudimentary Editing Skills Level 101: ACHIEVED. Mastery w/ percentages […]2015 Saturday Night Brainstorming and Task Forces: (1st draft)http://www.mathblogging.org/post/1104072015-01-31T20:31:16-05:00MayoSaturday Night Brainstorming: The TFSI on NHST–part reblog from here and here with a substantial 2015 update Each year leaders of the movement to “reform” statistical methodology in psychology, social science, and other areas of applied statistics get together around this time for a brainstorming session. They review the latest from the Task Force on Statistical Inference […]Out of the Boxhttp://www.mathblogging.org/post/1104082015-01-31T20:29:00-05:00Joe Schwartz One of the first things I did when I took over the position of math specialist at my school was take inventory of what had been left in my new room. There was quite a collection gathering dust in the closets, cabinets and drawers, most of it dating back many years: office supplies, manipulatives, old textbooks and workbooks, files, games, flashcards, and measurement tools. Some of it I tossed. Some of it I distributed to teachers and classrooms. The rest I […]scienceisbeauty:Mathematical drawings made from...http://www.mathblogging.org/post/1104052015-01-31T20:26:04-05:00Unknown<br/><br/>scienceisbeauty:Mathematical drawings made from segments.
Via The De Morgan Forum.
Read Moretheinfluentialdog:Every time I wear my Studio Beats with my hair...http://www.mathblogging.org/post/1104062015-01-31T20:22:00-05:00Unknown<br/><br/>theinfluentialdog:Every time I wear my Studio Beats with my hair down, I end up pulling out some of my hair. It always gets caught in the red portion between the ear piece and the head piece. Does this happen to anyone else? I can’t be the only one!!This is a real problem people! EVERYTIME!!It hurts! :(Spreadsheet for Student Swapshttp://www.mathblogging.org/post/1104042015-01-31T20:13:00-05:00Andrew KnauftMichael Fenton has been sharing some slick graphing challenges (linear, quadratic) recently — the basic idea is to give to the students a collection of points and the task to "Match My Graph"<br /><br />Last week, he tweeted a wish to Desmos for students to be able to create and share their own sets of challenges. Andrew Shauver suggested that in the meantime we just need a way for students to share links with each other.. possibly using Google Sheets?<br /><br />That got my wheels turning. My first thought was to […]Pentagon-Decagon Packinghttp://www.mathblogging.org/post/1104032015-01-31T20:00:19-05:00johnbaezTwo regular pentagons and a regular decagon meet snugly at a vertex: their interior angles sum to 360°. However, they can't tile the plane. However, they come fairly close, as shown in this picture by Greg Egan.On This Day in Math - February 1http://www.mathblogging.org/post/1104002015-01-31T19:00:00-05:00Pat Ballew<br />Some physicists describe gravity in terms of ten dimensions all curled up. But those aren't real words—just placeholders, used to refer to parts of abstract equations.<br />~Scott Adams<br /><br />The 32nd day of the year; 32 is conjectured to be the highest power of two with all prime digits. *Number Gossip (Could 27 hold the similar property for powers of three?)<br />Also, 131 is the 32nd prime and the sum of the digits of both numbers is 5. 32 & 131 is the smallest n, P(n) with this property. <br />\( 32 = 1^1 + […]The Mid-Class Launchhttp://www.mathblogging.org/post/1103992015-01-31T18:59:00-05:00Michael PershanI've been thinking lately about how formative assessment and feedback can sometimes feel overwhelming. Maybe that's just the lay of the land, or maybe there's something we can do about that. Can formative assessment be more manageable?<br /><br />I think that there are some easy shifts to make. A small change that makes a big difference is to increase the number of activities that you launch half-way through your class period. That way, activities don't wrap up at the end of a single class period and you […]Sunday Morning Insight: The Hardest Challenges We Should be Unwilling to Postponehttp://www.mathblogging.org/post/1103982015-01-31T18:40:00-05:00IgorLast Wednesday, we had some of the most interesting talks around Data Science, Machine Learning and Non Profits. For the purpose of providing a panorama of non profits, we included Universities, Foundations, NGOs and an Open Source project. And it is no wonder that they are non profits, they tackle the hardest challenges in Data Science and Machine Learning.<br />We first heard Paul Duan, the founder of BayesImpact.org, a YCombinator-backed non profit. His presentation is here.<br /><br />Paul presented how they
[…]Making Math Funhttp://www.mathblogging.org/post/1104022015-01-31T18:31:00-05:00Paul RubinI was a math major from undergrad to doctorate, so obviously I think math is fun. Equally obvious to me (especially after teaching a variety of mathematical topics to college students), not everyone shares that opinion, which is too bad. Recently, though, I came across an organization devoted to making math fun for small children, and I wanted to share the link: Bedtime Math<br /><br />Bedtime Math provides a variety of resources for introducing children to math in a fun way. The organization's name comes […]foxglove summerhttp://www.mathblogging.org/post/1103972015-01-31T18:15:59-05:00xi'anHere is the fifth instalment in the Peter Grant (or Rivers of London) series by Ben Aaronovitch. Thus entitled Foxglove summer, which meaning only became clear (to me) by the end of the book. I found it in my mailbox upon arrival in Warwick last Sunday. And rushed through the book during evenings, insomnia breaks […]Critical thinking puzzleshttp://www.mathblogging.org/post/1104012015-01-31T18:00:00-05:00mathfailWhat comes in the first box? Source: http://puzzles4you.blogspot.comFull professors make more money than bus drivershttp://www.mathblogging.org/post/1103962015-01-31T17:25:30-05:00JSEFormer Republican Congressional candidate and current UW-Madison history professor John Sharpless stands up for us against the Governor: He said he arrives no later than 9 a.m. and leaves no earlier than 5 p.m. During that time, he said he’s either teaching, preparing lectures, doing research, attending required committee meetings, advising students and managing teaching […]Documenting a class-participation activityhttp://www.mathblogging.org/post/1103942015-01-31T17:03:16-05:00AndrewTian Zheng implemented my candies demo using Legos: Also lots of details on the results. The point here is not exactly what happened (but, yes, the demo did work) but rather the idea that you can use photos and graphs to document what worked in class. We should be able to do this sort of […]
The post Documenting a class-participation activity appeared first on Statistical Modeling, Causal Inference, and Social Science.diffeomorphic things
by Guillemin & Pollack, Differential...http://www.mathblogging.org/post/1103952015-01-31T17:00:09-05:00Unknown<br/><br/>diffeomorphic things
by Guillemin & Pollack, Differential Topologygeneralelectric:GE scientists are developing superhydrophobic...http://www.mathblogging.org/post/1103912015-01-31T16:28:23-05:00Unknown<br/> <br/><br/> <br/><br/> <br/>generalelectric:GE scientists are developing superhydrophobic surfaces to keep ice off of aviation equipment and wind turbines. The Slow Mo Guys captured this footage with their Phantom Flex camera on a recent trip to GE Global Research.
I can’t look away!Also, I want to be the person that updates the GE tumblr. You get to see all this cool stuff, play on tumblr, and get paid! How do I get that job?Understand the Measles Outbreak with this One Weird Numberhttp://www.mathblogging.org/post/1103902015-01-31T16:21:56-05:00Evelyn Lamb15. That’s all you need to know about the measles. OK, that’s not true at all. There’s no one weird trick that will give you a flat belly (besides lying face-down on something flat), and...<br/>
<br/>
-- Read more on ScientificAmerican.com
Contrary to popular belief, Ontario’s students are actually quite good at basic mathhttp://www.mathblogging.org/post/1103932015-01-31T16:08:53-05:00UnknownContrary to popular belief, Ontario’s students are actually quite good at basic math: David Reevely:The solution to Ontario’s slipping math scores is more math time in the classroom, says the province’s education minister — both for students and for the teachers who instruct them. But Liz Sandals wants parents to know something that might surprise them: The province’s young people are actually quite good at basic math skills.OC CUE Tech Fest 2015 Presentations: Digital Annotation Tools + Digital Formative Assessment Toolshttp://www.mathblogging.org/post/1103892015-01-31T15:58:00-05:00Crystal Kirch<br /><br /><br /><br />lokiseto:
laughterkey:
khymeira:
cruisingwithgunhead:
circuitb...http://www.mathblogging.org/post/1103922015-01-31T15:56:24-05:00Unknown<br/><br/>lokiseto:
laughterkey:
khymeira:
cruisingwithgunhead:
circuitbird:
new-aesthetic:
The Random Darknet Shopper, an automated online shopping bot with a budget of $100 a week in Bitcoin, is programmed to do a very specific task: go to one particular marketplace on the Deep Web and make one random purchase a week with the provided allowance. The purchases have all been compiled for an art show in Zurich, Switzerland titled The Darknet: From Memes to Onionland, which runs through January
[…]Alpha Flighthttp://www.mathblogging.org/post/1103852015-01-31T15:29:00-05:00Vlad AlexeevAlpha Flight comic book cover
http://im-possible.info/english/art/covers/comics-alpha-flight.html
dr-plague:
Bismuthhttp://www.mathblogging.org/post/1103862015-01-31T15:24:07-05:00Unknown<br/> <br/><br/> <br/><br/> <br/><br/> <br/><br/> <br/>dr-plague:
Bismuth
ohstarstuff:
A new dawn. Orion on its journey to space.
My dad...http://www.mathblogging.org/post/1103872015-01-31T15:18:07-05:00Unknown<br/><br/>ohstarstuff:
A new dawn. Orion on its journey to space.
My dad worked on the Orion project for awhile. My dad is cooler than yours.