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12:26 AM | Analyzing Errors - Free Poster

This year I'm making lots of tiny changes to my classroom. Still doing notebooks. But, I'm letting students use their notebooks on their quizzes. And, our notebooks are going to have a heap more worked examples in them. Still doing SBG. But, I'm changing the format of my quizzes and what students have to do to be able to requiz. Still doing A/B/Not Yet. But, I'm toying with the idea of changing how I enter these grades in the computer. This is yet to be […]

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12:00 AM | centerofmath:
Don’t let this happen to you…

centerofmath:
Don’t let this happen to you…

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I have read a lot of research papers, articles, books, magazine articles, and blog posts about math education and find it impossible to keep them all straight. Writing a review helps me process and remember the main points and gives me something I can look back on. I hope it helps you too. Check out all my reviews. […]
The post Review: Boaler (2015) - What's Math Got to Do With It? appeared first on Math Fireworks.

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11:00 PM | On This Day in Math - July 30

I have created a new universe from nothing. ~Janos Bolyai The 211th day of the year; 211 is a primorial prime,(a prime that is one more, or one less than a primorial can you find the next larger (or smaller) primorial prime? 211 is also the sum of three consecutive primes (67 + 71 + 73)...There are also 211 primes on a 24-hour digital clock. (00:00 - 23:59) *Derek Orr @ DerektionaryEVENTS1738 Euler sends a letter to John Bernoulli with the solution to a question from Danial […]

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10:42 PM | Voices in Your Head

We’ve all been there and will probably be there again, and if this doesn’t
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10:15 PM | gradient importance sampling

Ingmar Schuster, who visited Paris-Dauphine last Spring (and is soon to return here as a postdoc funded by Fondation des Sciences Mathématiques de Paris) has arXived last week a paper on gradient importance sampling. In this paper, he builds a sequential importance sampling (or population Monte Carlo) algorithm that exploits the additional information contained in […]

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From the Herald, from the TelegraphInterplanetary travel could be a step closer after scientists confirmed that an electromagnetic propulsion drive, which is fast enough to get to the Moon in four hours, actually works.The EM Drive was developed by British inventor Roger Shawyer nearly 15 years ago but was ridiculed at the time as scientifically impossible.I like a good scientific underdog story as much as the next guy, but sometimes when the scientific establishment is right. Roger Shawyer
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9:23 PM | Prima di Adamo

La fascinazione verso le teorie mistiche della reincarnazione si unisce con l'evoluzionismo, che stava muovendo i suoi primi passi, in Prima di Adamo, romanzo di Jack London che potremmo tranquillamente classificare come pura avventura.L'idea di London è, infatti, quella di raccontare la vita, più che fittizia di un nostro progenitore, appartenente a una di quelle razze di primati apparse prima degli uomini e da questi soppiantate. Attraverso il sogno, espediente narrativo utilizzato nella […]

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9:14 PM | "If I Only Had A...."

Fascinating post (and comments) about hydrocephalus sufferers who have remarkably little brain tissue but nonetheless function well... the initial one referenced had a 126 IQ... and, an honors mathematics degree! The author shorthands these patients as "VNBs," virtual no-brainers, and at one point writes:
"...under the right conditions, brain damage may paradoxically result in brain enhancement

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9:02 PM | A #miracle out of my window. #sunset

A video posted by Iakovos Ouranos (@iomikron) on Jul 29, 2015 at 2:02pm PDT
A #miracle out of my window. #sunset

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Original LEGO calculation busted by math professor: Chris Burns:This Friday a documentary will be released by the name of “A LEGO Brickumentary,” and in it, a math professor will tell you how many different LEGO creations you can make. Of course the real number isn’t entirely feasible to calculate. Back in 1958, LEGO estimated and suggested through a patent (as created by the original LEGO creator’s son, Godtfred Kirk Christiansen) that six standard LEGO bricks could potentially be
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7:49 PM | Dark Matter

Screenshots from science fiction TV series Dark Matter
http://im-possible.info/english/art/films/dark-matter.html

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7:46 PM | Centennial MathFest

The centennial summer meeting (“MathFest“) of the Mathematical Association of America, August 5-8, 2015, in Washington DC, features Hedrick Lectures on “Algebra Over Finite Fields” by Karen Smith, Centennial Lectures by Erik Demaine, Jennifer Chayes, Ingrid Daubechies, Carlos Castillo-Chavez, Karen Parshall, and Manjul Bhargava, and other invited lectures by Jeffrey Lagarias, David Bressoud, Erica Walker, Joseph Gallian,

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7:09 PM | Talking About Guns at School

Handling socially sensitive conversations is part of our job. Here's how I handle the student that likes to talk guns.

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For the record, let’s start here. Next month, Guinness World Records will officially celebrate its 60th anniversary as the leading authority on “record-breaking achievement.” A long-cherished favorite for holiday gifting and the coffee table, Guinness World Records not only provides a unique collection of knowledge but also encourages people to challenge the application of those [...]

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A Massachusetts judge has dismissed a lawsuit by researchers who argued that an investigation by Harvard cost them job offers. Last year, Piero Anversa, a stem cell researcher at the Brigham & Women’s Hospital, and a colleague, Annarosa Leri, sued Harvard over an investigation into their work that they claim damaged their reputations: As a result of […]
The post Judge dismisses cardiac stem cell researchers’ lawsuit against Harvard appeared first on Retraction Watch.

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Un sistema de espera M/M/1 es aquel que considera un servidor, con tiempos exponenciales de servicio y entre llegadas de clientes. La implicancia que los tiempos de servicio se distribuyan exponencial es que existe una preponderancia de tiempos de servicio menores al promedio combinados con algunos pocos tiempos extensos. Un ejemplo de ello es lo […]

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Suppose you are reading about a statistically significant result x from a one-sided test T+ of the mean of a Normal distribution with n iid samples, and (for simplicity) known σ: H0: µ ≤ 0 against H1: µ > 0. I have heard some people say: A. If the power to detect alternative µ’ is very low, then the statistically significant x is poor evidence of […]

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Recently James Tanton posted a short article about problems that are circulating on the internet such as (and this is the one he used) "What is the value of the following expression: 62 ÷ 2(3)+4, and then asked, "Is the answer 10 or is the answer 58?" (my personal choice for historical reasons explained below is 3.6) I don't care to argue the possible choices, although Professor Tanton does a good job of that in his blog, but I'm more interested in the history of some symbols for division he […]

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6:08 PM | Blurbs!

I don’t like social media very much. I never really subscribed to the whole Friendster, MySpace, Facebook, Twitter, Google Wave, Google+, and what have you social network sort of approach that you need to have “friends” and “followers” and “follow” other people. I always preferred to be the master of my domain. The king of … Continue reading Blurbs! →

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I have put together some very interesting facts about Pythagoras for kids. In order to help our readers who are teachers, I have also prepared a powerpoint presentation on the theorem. Pythagoras of Samos, as he is known, was a Greek mathematician and an ancient philosopher. When did Pythagoras live?Although there is limited verified literature available on the life of Pythagoras, he is believed to have lived between 580BC – 500BC hailing from the Greek Island of Samos. An article
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4:38 PM | Understanding when to use p-values

The p value is perhaps one of the most mis-used concepts in statistics. In fact, many researchers in science who are not statistics experts seem to believe that statistics is really the study of how to define and calculate p values. I'd say this attitude is prevalent especially in biology, medicine, and some areas of […]

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4:30 PM | How stolen data affects you

You typically hear about data breaches in terms of number of records that were hacked. "A million email addresses were stolen" or "hackers ripped off 100,000 passwords." Does anyone care?…Tags: New York Times, privacy, quiz

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4:00 PM | WordPressers Making a Splash

Bloggers are leaving their marks everywhere, online and in print.

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3:30 PM | Author disputes retraction of pine needle paper published “without the knowledge” of all authors

The properties of pine needles in northwestern China differ — both inside and out — depending on where on the slope of a mountain they are situated. The properties of a recent paper on this phenomenon have recently changed from “published” to “retracted.” It appears that some of the authors didn’t realize it had been submitted to The […]
The post Author disputes retraction of pine needle paper published “without the knowledge” of
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Eitan Tadmor of the University of Maryland is the recipient of the 2015 Peter Henrici Prize. The prize is awarded to Tadmor for his original, broad, and fundamental contributions to the applied and numerical analysis of nonlinear partial differential equations and their applications in areas such as fluid dynamics, image processing, and social dynamics. Eitan […]

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3:23 PM | Technology 2015-2016

I am at that point in the summer where I decide I need to start planning but then my temporary ADD kicks in. Standards, Lessons, Benchmarks, PARCC, Technology, Class Rules, INBs, Flipclass...It drives me crazy! I always say to myself KISS! But of course my brain doesn't work that way.So I start by breaking it down into categories, This post is obviously about technology. I won't lie I am the teacher in my school that loves technology and gets super excited about […]

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Brown University’s George Em Karniadakis is the 2015 recipient of the Ralph E. Kleinman Prize. Karniadakis is being recognized for his many outstanding contributions to applied mathematics in a broad range of areas, including computational fluid dynamics, spectral methods and stochastic modeling. Karniadakis is Charles Pitts Robinson and John Palmer Barstow Professor of Applied Mathematics […]

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The AWM-SIAM Sonia Kovalevsky Lecture is awarded to highlight significant contributions of women to applied or computational mathematics. This year, that honor goes to Linda J. S. Allen of Texas Tech University. Allen is being recognized for outstanding contributions in ordinary differential equations, difference equations and stochastic models, with significant applications in the areas of […]

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For all those, who like myself, can’t actually speak or read ancient Greek the title of this post is a phrase well known in the history of astronomy ‘saving the phenomena’, also sometimes rendered as ‘saving the appearances’. This post … Continue reading →

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di diffusione della scienza e rivoluzioni cc @aubreymcfato @CristianCantoro Utilizzare i dati sulle citazioni in Wikipedia per misurare la diffusione dell'open accessScrivevo all'inizio del 2011 per i festeggiamenti del wiki-decennale di una rivoluzione irreversibile. E' stato piuttosto interessante leggere il titolo che technology review ha utilizzato per raccontare dell'ultimo degli articoli dedicati all'enciclopedia libera: Why Wikipedia + Open Access = Revolution.L'idea degli autori, Misha
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Nielsen, F. (2007). Scientific citations in Wikipedia, First Monday, 12 (8) DOI: 10.5210/fm.v12i8.1997

Heather Ford, Shilad Sen, David R. Musicant & Nathaniel Miller (2013). Getting to the source: where does Wikipedia get its information from?, Proceedings of the 9th International Symposium on Open Collaboration, DOI: 10.1145/2491055.2491064

Misha Teplitskiy, Grace Lu & Eamon Duede (2015). Amplifying the Impact of Open Access: Wikipedia and the Diffusion of Science, Wikipedia Workshop at 9th International Conference on Web and Social Media (ICWSM), arXiv: 1506.07608v1

Citation

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After (or before?) @StartsWithABang's balloon animals' post? A couple of week ago Ethan Siegel published a post about ballon animals, so I decide to repost an old piece that I wrote in 2011 for my italian blog: the english version is lost, but it is magically reposted here! Two one-balloon constructions and their associated graphsI recently discovered this interesting site, vihart. In the site there are some interesting paper and today I want to write something about Computational Balloon
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Demaine E.D., Demaine M.L. & Hart V. (2008). Computational balloon twisting: The theory of balloon polyhedra., Proceedings of the 20th Canadian Conference on Computational Geometry (CCCG2008), 139-142.

Bryś K. & Lonc Z. (2009). Polynomial cases of graph decomposition: A complete solution of Holyer's problem, Discrete Mathematics, 309 (6) 1294-1326. DOI: 10.1016/j.disc.2008.01.054

Citation

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Supponiamo di doverci confrontare con un animale, ad esempio un cane o un lupo (o più in generale con un animale, addomesticato o selvaggio). Secondo Konrad Lorenz il comportamento aggressivo di un cane viene influenzato da due stati d'animo differenti: l'ira e la paura.Si può allora provare a prevedere il comportamento del cane in funzione di quale dei due stati domina: nel caso in cui l'animale è dominato da paura o da ira, proporre una previsione è abbastanza semplice; nel caso in cui il […]

Zeeman E.C. (1976). Catastrophe Theory, Scientific American, 234 65-83. DOI: 10.1038/scientificamerican0476-65

Jean Petitot (2013). Complexity and self-organization in Turing, The Legacy of A.M. Turing, (E. Agazzi, ed.), Franco Angeli, Milano, 149-182. arXiv: 1502.05328v1

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Non prevedevo di scrivere la versione italiana di un post sull'ultima news proveniente dal RHIC, ma mi è stato gentilmente chiesto, e provvedo ben volentieri. Inizio, però, con un piccolo cappello, alla fine del quale saprete che c'è anche un piccolissimo pezzetto (il doppio diminutivo è perché i firmatari del papero su arXiv sono veramente tanti) d'Italia in questa interessante scoperta.Tutto nasce da un post, nel flusso twittero, di Annalisa Arci, in cui racconta, in maniera e con un […]

Belavina A.A., Polyakova A.M., Schwartza A.S. & Tyupkina Y.S. (1975). Pseudoparticle solutions of the Yang-Mills equations, Physics Letters B, 59 (1) 85-87. DOI: 10.1016/0370-2693(75)90163-X

Hooft G.'. (1976). Symmetry Breaking through Bell-Jackiw Anomalies, Physical Review Letters, 37 (8) DOI: 10.1103/PhysRevLett.37.8

Hooft G.'. (1976). Computation of the quantum effects due to a four-dimensional pseudoparticle, Physical Review D, 14 DOI: 10.1103/PhysRevD.14.3432

Fukushima K., Kharzeev D.E. & Warringa H.J. (2008). The Chiral Magnetic Effect, Physics Review D, 78 (7) DOI: 10.1103/PhysRevD.78.074033

Kharzeev D.E. & Yee H.U. (2011). Chiral Magnetic Wave, Physical Review D, 83 DOI: 10.1103/PhysRevD.83.085007

STAR Collaboration (2015). Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions, arXiv, arXiv: 1504.02175v2

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A new clue about the #quarkgluonplasma from @RHIC_STAR at @BrookhavenLabWithin the particles that constitute atomic nuclei, protons and neutrons, there are the quarks, the elementary particles with fractional charges, linked to each other thanks to the gluons, bosons that carry the nuclear interaction. Thanks to the gluons it is impossible to observe, at present, free quarks, but it is expected that in the very first stage of the universe, matter was in a state called quark-gluon plasma. Thanks […]

Belavina A.A., Polyakova A.M., Schwartza A.S. & Tyupkina Y.S. (1975). Pseudoparticle solutions of the Yang-Mills equations, Physics Letters B, 59 (1) 85-87. DOI: 10.1016/0370-2693(75)90163-X

Hooft G.'. (1976). Symmetry Breaking through Bell-Jackiw Anomalies, Physical Review Letters, 37 (8) DOI: 10.1103/PhysRevLett.37.8

Hooft G.'. (1976). Computation of the quantum effects due to a four-dimensional pseudoparticle, Physical Review D, 14 DOI: 10.1103/PhysRevD.14.3432

Fukushima K., Kharzeev D.E. & Warringa H.J. (2008). The Chiral Magnetic Effect, Physics Review D, 78 (7) DOI: 10.1103/PhysRevD.78.074033

Kharzeev D.E. & Yee H.U. (2011). Chiral Magnetic Wave, Physical Review D, 83 DOI: 10.1103/PhysRevD.83.085007

STAR Collaboration (2015). Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions, arXiv: 1504.02175v2

Citation

ulaulaman tweeted: @ulaulaman

RT @titofaraci Metallaro una volta, metallaro per sempre.

2015-07-30 07:40:45

pkra tweeted: @pkrautz

2015-07-30 07:09:16

rmathematicus tweeted: @rmathematicus

RT @hckGGREN . @rmathematicus on Ptolemy and saving the phenomena: see also Goldstein (1997) at http://t.co/yQTpUyBIrd …

2015-07-30 06:42:35

rmathematicus tweeted: @rmathematicus

RT @uqpharri: Was ancient and medieval mathematical astronomy purely instrumentalist? Great piece on 'Saving the Phenomena'. https://t.co/…

2015-07-30 06:26:21

pkra tweeted: @pkrautz

@ReaderMeter @WikiEducation sorry for trolling a bit there. Couldn't resist. Recent discussions on phabricator show continued problems.

2015-07-30 06:23:20

pkra tweeted: @pkrautz

@ReaderMeter maybe give MW math extension volunteers more support than "beg for months for code review" then? cc @WikiEducation

2015-07-30 06:16:37

rmathematicus tweeted: @rmathematicus

RT @KeesJanSchilt New post on Corpus Newtonicum: To the unknown Scribe - Isaac Newton's assistants https://t.co/3p044hi4z4 #histSTM

2015-07-30 06:16:09

MindAfterMath tweeted: @MindAfterMath

2015-07-30 06:12:34

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