Mathblogging.orgRecent Postshttp://www.mathblogging.org/scripts/feed.php2014-09-01T19:20:24-04:00No copyright asserted over individual posts; see original posts for copyright and/or licensing.Mathblogging.org Atom serializerHappy Labor Day (hat-tip Mark Silcox)http://www.mathblogging.org/post/975722014-09-01T12:16:46-04:00Jon CogburnTechnology Flowhttp://www.mathblogging.org/post/975762014-09-01T12:01:00-04:00Tina CAt PCMI this summer we were discussing integrating student work into discussions and I realized I don't do this well. I also realized that I have a document camera that I almost never use - last year I used it to project my homework solutions in PreCalc daily and that one time I was being observed. That might be it. So I stopped to think, why? I am not one to use technology for technology's sake, but the document camera is a great tool and it's easier than having students come up to the board […]Maxwell’s equations in matterhttp://www.mathblogging.org/post/975652014-09-01T11:27:02-04:00growescienceReferences: Griffiths, David J. (2007), Introduction to Electrodynamics, 3rd Edition; Pearson Education – Problem 7.37. Inside matter, we’ve seen that the polarization and magnetization give rise to bound charges and bound currents. The earlier results applied in the electrostatic and magnetostatic cases, respectively, so we’d like to generalize these to get the corresponding equations in […]Bad Statistics: Ignore or Call Out?http://www.mathblogging.org/post/975692014-09-01T11:24:24-04:00AndrewEvelyn Lamb adds to the conversation that Jeff Leek and I had a few months ago. It’s a topic that’s worth returning to, in light of our continuing discussions regarding the crisis of criticism in science.
The post Bad Statistics: Ignore or Call Out? appeared first on Statistical Modeling, Causal Inference, and Social Science.Nesin Mathematics Village and Swedish Summer Schoolhttp://www.mathblogging.org/post/975742014-09-01T11:08:27-04:00Ryan O'DonnellWithin the last two months I had the privilege of teaching a week-long Analysis of Boolean Functions course at two different summer schools. In July I was at the (First Annual?) Swedish Summer School in Computer Science. This was wonderfully organized by KTH faculty Per Austrin, Johan Håstad, and Jakob Nordström, and took place [...]
Woodworking and Determining the Radius of a Circlehttp://www.mathblogging.org/post/975672014-09-01T11:05:06-04:00mathscinotesI was just at the Western Minnesota Steam Threshers Reunion (Figure 1), which is celebration of old-school steam technology. As always, it was a great show. The name of the reunion is a bit of a misnomer in that the … Continue reading →On deck this weekhttp://www.mathblogging.org/post/975702014-09-01T11:00:33-04:00AndrewMon: Bad Statistics: Ignore or Call Out? Tues: Questions about “Too Good to Be True” Wed: I disagree with Alan Turing and Daniel Kahneman regarding the strength of statistical evidence Thurs: Why isn’t replication required before publication in top journals? Fri: Confirmationist and falsificationist paradigms of science Sat: How does inference for next year’s data […]
The post On deck this week appeared first on Statistical Modeling, Causal Inference, and Social Science.Robust width: A characterization of uniformly stable and robust compressed sensinghttp://www.mathblogging.org/post/975712014-09-01T10:29:26-04:00Dustin G. MixonJameson Cahill and I recently posted a new paper on the arXiv that we’re pretty excited about. Suppose you want to do compressed sensing with L1 minimization. That is, you get for some nearly -sparse vector and some noise satisfying , and then you attempt to reconstruct by taking One of the main results of […]{Limited Time} Free Foldables (11 in total) for an Algebra INB!http://www.mathblogging.org/post/975682014-09-01T10:26:04-04:00Shana DonohueOMG, what am I doing? I guess the first long weekend of the brand new school year has got me feeling inspired! It’s good to be back with my students – many I’ve had for 3 year in a row (minus a few months of maternity leave) for Geometry, Algebra 2 and now Consumer Math […]Cybermenhttp://www.mathblogging.org/post/975662014-09-01T10:18:00-04:00(x, why?)(Click on the comic if you can't see the full image.)<br /> (C)Copyright 2014, C. Burke.I'm waiting for the NFL to be Upgraded. More good-natured fun can be found in yesterday's column Real-World Math: Bushels of Fun. <BR><br><br><br></br>
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Second year of Common Core Algebra 1http://www.mathblogging.org/post/975632014-09-01T10:09:00-04:00Lea Ann SmithOur department modified our Algebra 1 curriculum last year for the common core. This will be our second year of this course and we decided to remove the statistics unit. We have decided to offer one Prob and Stats course that covers all of the CCSSM standards rather than address them in little bits over our entire math curriculum. This frees up some time in our Alg 1 class, we would like to use this time to do a better job with the mathematical practices. We will be doing a section on math […]Math and Teaching Quotations for Common Core – Part 3http://www.mathblogging.org/post/975622014-09-01T09:41:55-04:00Bill LombardMath & Teaching Quotations has continued to be one of the most popular pages on my site, and it’s appropriate to revisit this as school resumes across the U.S. Here’s the direct link to quotes on Mr. L’s Math. A good quote can go a long way towards brightening my day as well as give students [...]KIAS-Kalender September 2014http://www.mathblogging.org/post/975612014-09-01T09:22:45-04:00ThiloPascals magisches Sechseck, Rep-4-tile, Two Twos und allerlei Zahlenspielereien – auch diesen Monat wieder die obligatorischen Bilder vom KIAS-Mathekalender: Die Formel für die 2 ergibt sich unmittelbar aus durch Multiplikation mit (-1) und Addition von . Ein Rep-4-tile (Bild unten) ist ein Teil, das in 4 kleinere Kopien seiner selbst zerlegt werden kann. Als Pascals…Vedic Maths at the Cape Home Educators Expohttp://www.mathblogging.org/post/975592014-09-01T09:13:00-04:00Neshni NaidooOn Saturday, 30 August, Vedic Maths Forum South Africa exhibited at The Cape Home Educators Expo. Visitors came from as far as Citrusdal to learn what is new on the homeschooling front in South Africa and see what learning resources are available. Exhibitors ranged from more established organisations to the smaller emerging businesses entering the education market. In conversations with the parents who visited the stand - it became clear that in some cases, homeschooling is not a matter of
[…]Warm Upshttp://www.mathblogging.org/post/975642014-09-01T09:02:00-04:00Lea Ann SmithI've seen some conversation about warm ups in other recent blogs, I use Kuta software to generate multiple choice worksheets and use clickers in self paced mode. The students do the worksheets and put in their answers while I'm checking hwk, handing back papers, etc. I do most problems from recent work, but I will be spiraling in problems from older lessons, as inspired by Kathryn's session at TMC14. I review the results of each question (histogram, not individual students) with the students […]Netflix and the ethics of modern journalismhttp://www.mathblogging.org/post/975602014-09-01T09:00:00-04:00MarkI had meant to drop this topic after the recent Emmys post, but one more issue got stuck between my teeth and I think it would be easier to write it away then to try to ignore it.<br /><br /><br /><br />I recently heard an interview on public radio that bothered me quite a bit but before I get into the specifics I should probably lay some groundwork about the Netflix business model.<br /><br />When Netflix first started as a DVD-by-mail service, perhaps its greatest selling point was selection. It couldn't offer every movie and […]Danish committee rejects much of Klarlund Pedersen’s appeal of misconduct findingshttp://www.mathblogging.org/post/975562014-09-01T08:56:12-04:00Ivan OranskyThe Danish Committees on Scientific Dishonesty (DCSD, Danish acronym UVVU) has partially reversed a December 2013 finding of misconduct against a scientist in Denmark, but has upheld most of its ruling. Bente Klarlund Pedersen, whose case was tied up with that of Milena Penkowa, another scientist in Denmark found guilty of misconduct, committed misconduct in […]9/1/14http://www.mathblogging.org/post/975572014-09-01T08:30:22-04:00Unknown9 = 11 - √4
Also:
√9 + 1 = 1 * 4September 1, 2014 #HappyLaborDayhttp://www.mathblogging.org/post/975502014-09-01T08:03:00-04:00Mathematical Association of America<br /><br /><br /><br /><br /><br /><br />Solution at the bottom of this page.Like this problem? Try our Contest Problem Book series!<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />Exercise your mind daily with a problem from the AMC-8, AMC-10, or AMC-12, provided by Mathematical Association of America's American Mathematics Competitions.2014 ISN Setuphttp://www.mathblogging.org/post/975532014-09-01T08:00:00-04:00Learning_with_tapeThis year, I have completely changed how my students are doing interactive notebooks. <br /><br />Each student has 4 1-subject notebooks. The first will be used all semester, and the other 3 will be used for each of the 3 grading periods. The notebook for each grading period will be used for homework and notes, and the notebook that will be used all semester has 5 sections for Daily Quizzes, Formulas & Reference, Vocabulary, Review Questions, and Warmups. <br /><br />Here's the 1st 6 weeks Notes ISN
[…]Is Savant Itchin' For a Fight?http://www.mathblogging.org/post/975462014-09-01T07:30:00-04:00"Shecky Riemann"<br />Switch or don't switch... does that sound familiar?<br /><br />Marilyn vos Savant is famous for (among other things) posing the original "Monty Hall puzzle" to a national audience, and baffling many, including experienced mathematicians. By now, almost anyone having interest in the puzzle no doubt knows the correct answer and why.<br /><br />So it seemed a bit curious that in yesterday's Sunday "Parade" magazine column Marilyn deals with a similar-sounding puzzle that arrives at a different answer (the answer, 50/50, […]Monty Hall Continuedhttp://www.mathblogging.org/post/975542014-09-01T07:22:12-04:00chrisharrowIn my recent post describing a Monty Hall activity in my AP Statistics class, I shared an amazingly crystal-clear explanation of how one of my new students conceived of the solution: If your strategy is staying, what’s your chance of winning? … Continue reading →WS MoreOrLess: Do We Use Only 10% of Our Brains? 29 Aug 14http://www.mathblogging.org/post/975512014-09-01T07:00:00-04:00BBC Radio 4Is it true that humans use just 10% of their brains? Itâs the premise of the new film Lucy, in which the brain capacity of Scarlett Johanssonâs character increases to dangerous levels. Tim Harford uses considerably more than 10% of his brain to separate the neuro-science facts from the fiction with Professor Sophie Scott.
What drives the price of footballers? Tim Harford tries to understand the huge transfer fees with Raffaele Poli from the CIES Football Observatory and football […]Robin Williams Redux...http://www.mathblogging.org/post/975482014-09-01T07:00:00-04:00"Shecky Riemann"Now for something completely different (for MathTango)…
I've
written before how much I admire Cathy O'Neil's keen ability to touch
on varying topics over at her blog. Despite coming from a
mathematics academic background and titling her blog "Mathbabe,"
Cathy writes on a wide range of topics that rattle
around in her head. So I'll sorta take that cue today to veer off and relate an odd,FT: “The North needs to retain its science graduates”http://www.mathblogging.org/post/975472014-09-01T06:37:28-04:00anelimAccording to a new report, tech startups are disproportionately concentrated in the UK’s south. Unsurprising, really. Some analysis and (a small number of) counterexamples here – article byBy Murad Ahmed and Chris Tighe http://www.ft.com/cms/s/0/a45561aa-2300-11e4-8dae-00144feabdc0.html#axzz3BUjQ6Bqlnatureofnature:
Confocal microscopy of plant tissueshttp://www.mathblogging.org/post/975522014-09-01T06:34:34-04:00Unknown<br/><br/>natureofnature:
Confocal microscopy of plant tissuesQuines in chemlambdahttp://www.mathblogging.org/post/975492014-09-01T06:04:28-04:00chorasimilarityI propose the following definition of a quine, adapted to chemlambda. In chemlambda with the sequential strategy, a quine is a g-pattern with the property that after one reduction step it transforms into another g-pattern which is the same as the initial one, up to renaming of the port variables. Therefore: we start with a […]"Edición 5.6: Paul Erdős" del Carnaval de Matemáticas (15-21 septiembre 2014)http://www.mathblogging.org/post/975442014-09-01T05:13:23-04:00cifrasyteclasSe acabó agosto. Mientras playas y pueblos se vacían en España, blogs y redes van llenándose de nuevo. Y qué mejor que una nueva edición del Carnaval de Matemáticas para empezar el curso. Si quieres participar, basta tener ganas de divertirse y disfrazar de matemáticas la rutina. ¿Te unes a la fiesta?
(Lee aquí la entrada completa)
Beyond the Limit, IIIhttp://www.mathblogging.org/post/975452014-09-01T05:00:00-04:00Mathematical Association of AmericaIn my last two columns, Beyond the Limit, Iand Beyond the Limit, II, I looked at common student difficulties with the concept of limit and explained Michael Oehrtman’s investigations into the metaphors that students use when they try to apply the concept of limit to problems of first-year calculus. The point of this exploration is to identify the most productive and useful ways of thinking about limits so that we can channel calculus instruction toward these understandings. In this month’s
[…]Bad at Math Is a Liehttp://www.mathblogging.org/post/975432014-09-01T05:00:00-04:00Mathematical Association of AmericaMatt Waite—University of Nebraska-Lincoln<br /><br />All I had to do was test into college algebra. That was what the College of Journalism and Mass Communications at the University of Nebraska required in 1993. If you could score well enough on the math placement exam for incoming freshmen to get into college algebra—not take it, just get into it—you were done with math. <br /><br />I very nearly didn’t graduate from high school on time because of math, so this made the test a five-alarm panic attack. I […]