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7:49 PM | Being smart, being judged smart

There’s recently been a lot of fuss (including on some philosophy blogs) about a short paper by Sarah-Jane Leslie et al., that purports to show that “women are under-represented in fields whose practitioners believe that raw, innate talent is the main … Continue reading →

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7:18 PM | A Band Of Sanity

A Band Of Sanity
by Erwin Bonsma
http://im-possible.info/english/anim/gif/erwin-bonsma-2.html
Author - http://eriban.deviantart.com/

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7:11 PM | Electric quadrupole radiation

References: Griffiths, David J. (2007), Introduction to Electrodynamics, 3rd Edition; Pearson Education – Chapter 11, Post 11. In analyzing radiation from an arbitrary configuration of charge, we made the assumption that the maximum dimension of the source is much smaller than the observation distance, so that we can retain only first order terms in , […]

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References: Griffiths, David J. (2007), Introduction to Electrodynamics, 3rd Edition; Pearson Education – Chapter 11, Post 10. If a charge falls under the influence of gravity, it accelerates and therefore radiates. This means that not all of the potential energy lost as the charge falls is converted to kinetic energy, so a charged object falls […]

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Assistant Professor, Mathematical Sciences (University of Montana): Here is the Job Description:
The University of Montana invites applications for an Assistant Professor, tenure-track position in Mathematics Education to begin August 2015. UM, the College of Humanities and Sciences, and the Department embrace diversity as a core value. Applications from persons with diverse backgrounds are especially welcome. UM, the College of Humanities and Sciences, and the Department embrace diversity as a
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5:37 PM | Dreaming about Maths

I've only been back at work three weeks and I've already started to dream about maths again. And not in a good way. I mark a set of homeworks and dream about the answers - they swim around my head all night long, tormenting me. Perhaps I shouldn't mark in the evenings.
I also lie awake at night thinking about lessons that didn't go well. I know, I know - don't dwell on them - after all, I learn

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NHL, Sportvision attempt revolutionary new method of data collection: TSN.ca Staff:
The NHL and Sportvision announced on Saturday a partnership to revolutionize the collection of data in the game of hockey.

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There are two different ways to think about complex numbers -- algebraically or geometrically. Most math students only learn how to think algebraically about complex numbers. This is a shame. It’s like playing piano with one hand tied behind your back. Without the geometric perspective, many complex numbers problems become harder.(I also think that without the geometric perspective complex numbers hardly make any sense at all.)Here's a fairly typical complex numbers problem (from a PARCC
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Reflections on Paul Erdős on His Birth Centenary: Part 1 of a two-part feature on Paul Erdős in the Notices of the American Mathematical Society.

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References: Griffiths, David J. (2007), Introduction to Electrodynamics, 3rd Edition; Pearson Education – Chapter 11, Post 9. Here’s a generalization of the rotating dipole problem we did earlier. This time we have a circular ring with radius with a linear charge distribution, at , of where is the azimuthal angle. The disk is set spinning […]

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We used our Zome Geometry book for another Family Math project today. The project we stumbled on used the blue struts to talk about volume and scaling. It starts by asking a seemingly simple question about the volume of two boxes you can make with the blue struts. Here’s the problem: and the constructed…

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4:42 PM | OBE

No, it is not the Queen’s Honours list. It stands for Outcomes Based Education, the latest pedagogical fad. The EU has practically adopted it as its official educational project. Which probably means that to bid successfully for EU funded projects … Continue reading →

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References: Griffiths, David J. (2007), Introduction to Electrodynamics, 3rd Edition; Pearson Education – Chapter 11, Post 8. Having examined electromagnetic radiation from an oscillating electric dipole, we can now look at radiation from an arbitrary source of moving charges. The derivation of the results is rather long and Griffiths treats it in detail in his […]

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I wish I could superpose votes on Election Day. However much I agree with Candidate A about social issues, I dislike her running mate. I lean toward Candidate B’s economic plans and C’s science-funding record, but nobody’s foreign policy impresses … Continue reading →

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2:19 PM | Tell me what you don’t know

We’ll ask an expert, or even a student, to “tell me what you know” about some topic. But now I’m thinking it makes more sense to ask people to tell us what they don’t know. Why? Consider your understanding of a particular topic to be divided into three parts: 1. What you know. 2. What […]
The post Tell me what you don’t know appeared first on Statistical Modeling, Causal Inference, and Social Science.

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1:36 PM | Tangrams

A presentation introducing Tangrams, followed by the rather essential tangram-set and finally, a bunch of printable sets of tangram puzzles tangram-images-variations tangram-people

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1:18 PM | icicles on the Ben

Filed under: Mountains, pictures, Travel Tagged: Ben Nevis, Highlands, ice climbing, Scotland

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1:07 PM | Rob's 60th

Rob Calderbank is a mathematician of great caliber in coding and information theory, including its algebraic aspects. He is the winner of the Shannon award and the Hamming medal. Rob's 60th birthday celebration will be in La Jolla this weekend. He was a terrific mentor to me at AT&T in years long behind us, and I am looking forward to being at the celebration!

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updated corollary

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12:38 PM | Tests, Quizzes and Grades

One of the changes I made this year is I stopped giving end of unit/chapter tests. Our school is using Achievement Network to administer benchmark exams every 6 weeks and we have arranged our curriculum so that we are teaching those standards that they will be tested on. So I thought, these are actually the unit tests, there is no need for two.What I do give are frequent concept checks. These are quizzes and I've made them worth 60% of the students grade and I hoped that by […]

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Office Fire An engineer, a physicist, and a mathematician are working, when a small fire breaks out in front of their offices. The engineer panics and grabs the fire extinguisher, spraying it everywhere, putting out the fire, but causing extra damage in the process. The physicist runs some quick calculations, and uses just enough to […]
Math and Multimedia - School math, multimedia, and technology tutorials.

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12:15 PM | James Gleick On Mathematics

This week's 'Sunday reflection,' a few succinct lines from an old NY Times James Gleick piece:"…unspoken, but always present, is the faith that doing mathematics purely, following an internal compass, seeking elegance and beauty in a strange abstract world, is the best way in the long run to serve practical science. As physics or biology progress, they will inevitably find that the way ahead has been cleared by some odd piece of pure mathematics that was thought dead and buried for many
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This blog post will outline the solution to last year’s MMC division finals-orals team category. We will start for the first ten questions, the next set of questions will be added very soon. 15-second...
The post Solution to 2014 MMC Division Finals-Orals 4th Year appeared first on Techie Math Teacher.

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11:39 AM | Lovely or Tricky Triangle Question?

In addition to not being drawn to scale and asking for congruence anyway, I like this problem because it potentially forces some great class discussions. One responder suggested using the Law of Sines (LoS) to establish an isosceles triangle. My first … Continue reading →

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11:22 AM | Un anno di matematica e Pink Floyd

Ieri il mio librino La matematica dei Pink Floyd ha compiuto un anno, dato che è uscito ufficialmente il 24 gennaio 2014.Sono stati dodici mesi entusiasmanti: ho avuto l'onore di presentare l'e-book al Salone Internazionale del Libro di Torino ma anche in altre occasioni non meno divertenti, presso biblioteche e scuole e all'interno di trasmissioni radiofoniche.Il destino ha anche voluto far sì che l'anno del mio librino coincidesse con l'anno del ritorno dei Pink Floyd, con il nuovo album
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11:07 AM | Marking

Currently marking exam scripts. Do students read the comments on what went wrong for students last year? If so, when they read “many students incorrectly wrote <this>”, perhaps what they remember is <this>. For example, every year that I ask for … Continue reading →

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Stupiti che 1 non sia primo? Scopriamo insieme perché è "solo" l'unità!Abbiamo già visto come, partendo dai numeri primi, si possa sviluppare un discorso più o meno approfondito sulle fondamenta matematiche. Altrettanto fondamentale, però, si rivela provare a rispondere alla domanda su quale sia il numero primo più piccolo. E', infatti, abbastanza noto come il numero 1 sia stato ora inserito ora escluso dalla lista dei numeri primi, ottenendo in alcuni casi lo status di più piccolo tra […]

Agargun A.G. & Fletcher C.R. (1997). The Fundamental Theorem of Arithmetic Dissected, The Mathematical Gazette, 81 (490) 53-57. DOI: http://dx.doi.org/10.2307/3618768

Crandall R. & Pomerance C.B. (2005). Primes!, Prime Numbers, Prime numbers: a computational perspective 1-82. DOI: http://dx.doi.org/10.1007/0-387-28979-8_1

Caldwell C.K. & Xiong Y. (2012). What is the smallest prime?, Journal of Integer Sequences, 15 arXiv: 1209.2007v2

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Winifred Edgerton Merrill fu la prima americana ad ottenere un dottorato in matematica presso la Columbia University nel 1886. Nella sua tesi sviluppò una rappresentazione geometrica degli infinitesimi in diversi sistemi di coordinate, utilizzando lo jacobiano per per derivare le trasformazioni tra gli integrali nei diversi sistemi.Tra matematica e astronomiaNata a Ripon, nel Wisconsin, il 24 settembre del 1862 da Emmet e Clara Edgerton, si trasferisce con la famiglia a New York intorno al […]

Kelly S.E. & Rozner S.A. (2012). Winifred Edgerton Merrill: "She Opened the Door", Notices of the American Mathematical Society, 59 (04) 504-512. DOI: http://dx.doi.org/10.1090/noti818

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Winifred Edgerton Merrill fu la prima americana ad ottenere un dottorato in matematica presso la Columbia University nel 1886. Nella sua tesi sviluppò una rappresentazione geometrica degli infinitesimi in diversi sistemi di coordinate, utilizzando lo jacobiano per per derivare le trasformazioni tra gli integrali nei diversi sistemi.Tra matematica e astronomiaNata a Ripon, nel Wisconsin, il 24 settembre del 1862 da Emmet e Clara Edgerton, si trasferisce con la famiglia a New York intorno al […]

Kelly S.E. & Rozner S.A. (2012). Winifred Edgerton Merrill: "She Opened the Door", Notices of the American Mathematical Society, 59 (04) 504-512. DOI: http://dx.doi.org/10.1090/noti818

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Direi che oggi pomeriggio è stato un bel respirare, al Palazzo Brera. Cristina Lazzeroni dell'Università di Birmingham è venuta alle 18 (come avevo scritto nel post precedente) per raccontare del bosone di Higgs, del modello standard e di materia e antimateria. E' una sperimentale presso l'esperimento LHCb al CERN, l'esperimento dedicato proprio alla ricerca su uno dei grandi misteri dell'universo: perché in esso c'è un eccesso di materia (e d'altra parte se non fosse così, non ci sarebbe […]

Aaij R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander & S. Ali & (2013). First Observation of CP Violation in the Decays of B_{s}^{0} Mesons, Physical Review Letters, 110 (22) DOI: http://dx.doi.org/10.1103/physrevlett.110.221601

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Per i I cieli di Brera, il 24 settembre (domani... scusate per il ritardo nell'annuncio...) alle 18 presso la Sala delle Adunanze dell'Istituto Lombardo nel Palazzo Brera sito in via Brera 28 (Milano), si terrà la conferenza La fisica delle particelle e il Large Hadron Collider: recenti sviluppi e questioni aperte: Cristina Lazzeroni ci introdurrà alla fisica delle particelle e agli studi fatti al Large Hadron Collider del Cern di Ginevra mettendo l’accento su recenti sviluppi come la
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Aad G., J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, S. H. Abidi, M. Abolins, O. S. AbouZeid & H. Abramowicz & (2014). Measurement of the Higgs boson mass from the $H\to \gamma \gamma $ and $H\to Z{Z}^{*}\to 4\ell $ channels in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector, Physical Review D, 90 (5) DOI: http://dx.doi.org/10.1103/physrevd.90.052004

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j_lanier tweeted: @j_lanier

RT @artlaflamme: Explaining White Privilege to a Broke White Person. http://t.co/b4SUeCiJBK

2015-01-26 03:41:48

MrHonner tweeted: @MrHonner

RT @bitcraftlab: Leaf Venation Portraits by @loomsci >>> https://t.co/CgbPJR9Yul http://t.co/PQzhfdqcTy

2015-01-26 03:05:41

peterrowlett tweeted: @peterrowlett

Travels in a Mathematical World Podcast Archive: 50 - Sebastien Guenneau, Invisibility cloaks http://t.co/8MXvKDAAif

2015-01-26 02:54:03

MindAfterMath tweeted: @MindAfterMath

2015-01-26 02:47:23

bobloch tweeted: @bobloch

Just added #slowmathchat to my Hootsuite stream. Looking forward to seeing where this goes...awesome idea by @mjfenton

2015-01-26 01:56:41

musegarden tweeted: @musegarden

RT @CassandraAtLaw: How the fuck do we have families be investigated for letting 8yos go to parks alone, but you can just let your kid get …

2015-01-26 01:54:04

mathhombre tweeted: @mathhombre

Will's thinking about real life lessons, connecting @ddmeyer's TEDx and @Mathalicious' Domino's pizza lesson. http://t.co/KC5NDmgEv9

2015-01-26 01:32:03

MindAfterMath tweeted: @MindAfterMath

2015-01-26 01:30:41

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