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Math Team Canada’s incredible ninth place finish and Alex Song’s top ranking at the IMO has received a lot of attention in the media this week. The story has gained traction in media outlets and on social media. Canadian astronaut Chris Hadfield and NDP Leader Tom Muclair were two of the many people to offer their congratulations to Alex via Twitter. The CMS has staged Canadian participation in the IMO since 1981 and is one of the many programs that helps promotes the advancement, […]

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The CMS sponsored the first ever Canadian Undergraduate Computer Science Conference (CUCSC) at the University of British Columbia this July. CUCSC showcased undergraduate research in the computing sciences and was inspired by the Canadian Undergraduate Mathematics Conference (CUMC). The CMS is pleased to continue to support initiatives that encourage STEM careers and professional development in Canada. For more information visit cucsc.ok.ubc.ca.

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12:41 AM | How many chess games are possible?

Dr James Grime talking about the Shannon Number and other chess stuff. More soon on chess positions and numbers.

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There are "a range of opinions about levels of risk associated with being a particular weight and whether other measures such as waist circumference, hip to waist ratio, waist to height ratio are more important".

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9:40 AM | Year 7 Introductory Algebra - ABCD quiz

A set of four quizzes (A, B, C, D) for Year 7 Introductory Algebra.

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8:38 AM | Magic Vs

An interactive SMART Notebook file plus a worksheet and some number cards for interacting with the NRICH problm Magic Vs.

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See the vibrations in a cymbal viewed at 1000 frames per second.

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7:16 AM | Three high-speed camera shots

I came across this clip in 2009 and have been using it as an introduction to rates, i.e. we see so much more detail when the frame rate of the camera is 2500 fps.

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2:29 AM | Tennis serve in slow motion

At 6000 fps, you can see just how much the racquet flattens a tennis ball on the serve.
[Kottke]
Super slow motion footage is a good introduction to rates.

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1:54 AM | Absolute zero to ‘absolute hot’

How cold can it get on Earth? How hot can hot truly get?
An infographic that takes you from absolute zero to what scientists think is the absolute heat limit.

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1:43 AM | Nardò Ring

The Nardò Ring is a high speed, 7.8 mile long, circular test track in Nardò, Italy. Each of the ring’s four lanes has a determined “neutral speed” and is banked in such a manner that one can drive as if the road were straight.
Stimulus for Extension 2 about curved tracks.

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3:43 PM | Monster School Bus

In Monster School Bus, students play a newly hired bus driver with a certain number of seats on the bus. The mission: to pick up each neighborhood’s little monsters and bring them to school – without dividing up groups (monsters don’t like that).
In early levels, each little monster takes up one seat and players combine integers to add up to 10. Each new neighborhood exposes learners to a more complex set of numbers, including decimals and fractions.
The design of characters […]

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3:35 PM | Number Rights

Whole numbers are no better than any others! Practice plotting values on the number line as a passionate activist rises up and demands equity for all numbers, including fractions and decimals.

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3:19 PM | Pearl Diver

Navigate the number line while diving amidst shipwrecks and sunken ruins. Will you find a pearl, or an old boot? Watch out for the electric eel! Pearl Diver teaches properties of numbers, how to plot numbers, how to visualize quantity on the number line, how to order numbers, and how to use the number line as a visual model for mathematical operations.

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3:10 PM | Game Over Gopher

Game Over Gopher is an exciting tower defense game that guides students in plotting coordinate pairs, differentiating negative coordinates from positive coordinates, and identifying the four quadrants. Hungry space gophers are marching towards a prize carrot, and to defend it players place tools around the coordinate grid to “feed” gophers and make them lose interest. Ruby mines (which must be placed at designated x, y coordinates) yield currency that players spend to strategically […]

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2:44 PM | Gate

Gate is designed to strengthen number sense, especially around place value. When students hit 6th grade, they begin applying basic math concepts to more difficult applications, including with fractions and decimals. Frequently, students lose the ability to "make sense" of these numbers. For example, they fail to realize that just as 8 + 2 = 10, 0.8 + 0.2 = 1.0. Additionally, they struggle in building number groups – seeing, for example, that the number "99" can be created with 99 ones, […]

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Math Team Canada placed ninth out of 104 countries at the 56th International Mathematical Olympiad (IMO) in Chiang Mai, Thailand. The team achieved impressive individual results. Zhuo Qun (Alex) Song (Phillips Exeter Academy, Exeter, N.H.) and Kevin Sun (Phillips Exeter Academy) both earned gold medals and Yan (Bill) Huang (West Windsor-Plainsboro High School South, West Windsor, N.J.) Michael Pang (Fort Richmond Collegiate, Winnipeg, Man.), Alexander Whatley (North Houston Academy of Science […]

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10:39 AM | Derivative Plotter

Show the derivative function for a series of examples. Also has the ability to show the derivative of a user-defined function.

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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

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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

mathhombre tweeted: @mathhombre

2015-08-03 01:48:24

profkeithdevlin tweeted: @profkeithdevlin

RT @PBremser: @profkeithdevlin Also mercenary? I count $15,000,000 to his campaign from fracking/oil interests http://t.co/iLTOTS00aW

2015-08-03 01:24:13

MrHonner tweeted: @MrHonner

RT @ShelbyAaberg: At our #paemst event we also made rocket launchers @MrHonner observes the launchpad. #noycechat http://t.co/BiVhzgpO1K

2015-08-03 01:13:37

mathhombre tweeted: @mathhombre

Franchesca Warren connects classroom discipline/authority to Sandra Bland's arrest. http://t.co/cMdKlZ698V via @Tolerance_org #equity

2015-08-03 01:12:33

mathhombre tweeted: @mathhombre

2015-08-03 01:03:21

DrMathochist tweeted: @DrMathochist

RT @DarickR: Oh, sweet irony... http://t.co/47EOUii7L8

2015-08-03 00:51:12

mathhombre tweeted: @mathhombre

RT @gwaddellnvhs: The #TMC15 archive is up and running! So far about 55 blog posts for your reading convenience! Enjoy. http://t.co/w5IjY7S…

2015-08-03 00:45:15

profkeithdevlin tweeted: @profkeithdevlin

“Ted Cruz expresses 'full out denial' of global warming during forum http://t.co/zUkl9eTnRj” Also believes Earth is flat? Stupid & ignorant.

2015-08-03 00:41:33

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