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Authors of a widely covered study that documented traces of plague and anthrax on surfaces across New York City have revised the paper after public health officials challenged their interpretations of the data. It’s hard to overestimate the attention these findings received when first published. “Bubonic plague found in NYC subway,” wrote The Daily Beast. “Your […]
The post Plague or anthrax on the subway? Think again, says now-corrected study appeared first on
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The self-proclaimed “father of nutritional immunology,” Ranjit Kumar Chandra, has lost a libel lawsuit against the Canadian Broadcasting Company (CBC). The suit was in response to a 2006 three-part documentary from the CBC, which examined allegations of fraud against the former Memorial University researcher. After the 58-day trial, the Ontario Superior Court of Justice “ruled […]
The post Nutrition researcher Chandra loses libel case against CBC appeared first on Retraction Watch.

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A paper on how abnormal stem cells can cause benign bone tumors has been retracted by Cell Stem Cell after an inquiry into image duplications also uncovered “multiple instances of inappropriate western blot image adjustment.” The first two authors “declined” to sign the retraction, according to the notice. Besides confirming initial suspicions that images had been […]
The post Inquiry into duplications reveals “multiple” image problems in tumor study
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The American Journal of Clinical Nutrition is retracting a paper that showed genetically engineered rice serves as an effective vitamin A supplement after a Massachusetts judge denied the first author’s motion for an injunction against the publisher. The journal announced plans to retract the paper last year following allegations that the paper contained ethical mis-steps, such […]
The post Golden rice paper pulled after judge rules for journal appeared first on Retraction Watch.

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We present a guest post from Tracy Tullis, author of a recent story in the New York Times that — as we reported — the editors said afterwards they “would not have assigned” to her if they’d known about her “involvement in a cause related to news coverage.” This is her side of the story. […]
The post NYT journalist: I am not a neutral observer–can I still be a fair reporter? appeared first on Retraction Watch.

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Olivier Voinnet — a plant researcher who was recently suspended for two years from the Centre national de la recherche scientifique (CNRS) after investigations by ETH Zurich and CNRS found evidence of misconduct — has issued his second retraction and two more corrections. PNAS posted the retraction earlier this week for a 2006 article after an inspection of […]
The post Voinnet notches second retraction, two more corrections appeared first on Retraction Watch.

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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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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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1:30 PM | Retracting duplicated paper “may damage the integrity of the literature,” says plant journal editor

In Vitro Cellular & Developmental Biology – Plant has flagged a 2004 article that was “accidentally” duplicated from another paper published earlier that year — but did so in the form of a publisher’s erratum, not a retraction. The editor of the journal justified the decision by arguing that the duplicated paper had been cited “over a […]
The post Retracting duplicated paper “may damage the integrity of the literature,” says plant journal
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We announce the User's Guide Project.

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1:42 AM | Inequality Proof

The format of two-column proof from high school geometry class is playfully used to present statements and reasons about wealth inequality.

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1:42 AM | The Topology of Absence

“The Topology of Absence” literalizes triangulations, hyperbeloids, and the concept of the limit in the story of “locating” a lost mother. This story, like “The Physicist’s Basement” in the July 2014 issue, is part of a series that worries about competing notions of mathematics, i.e., mathematics as some sort of disembodied configuration or as emergent in the material reality of human life.

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1:42 AM | Zero

This poem attempts to describe the sensations we might have reading the numeral "0" if we compare it to how we experience our own bodies.

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No summary available for this post.

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Experiments in evolutionary artificial intelligence demonstrate that progress toward an important, difficult goal is not best achieved by attempting to go directly toward that goal, but rather, by rewarding novelty.

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This review describes Mazur's engaging popularization of an interesting and important topic, the history of mathematical symbols and notation. The reviewer only wishes that some of the history had been done better.

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1:42 AM | On Mathematicians' Eccentricity

Eccentricity, though not inevitable, happens. Lightheartedly classifying examples, the author traces it back to factors, like creativity and absorption, essential to mathematical success, and recommends an attitude of amused tolerance towards others as well as to ourselves.

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National Council of Teachers of Mathematics (NCTM) recommends that students be able to communicate mathematics, using correct and appropriate language, by eighth grade [8]. Mathematics teachers at all levels agree that they have the responsibility to teach their students content-specific writing, but many feel that they don’t have the tools to do this work. This article offers a foundation and methodologies for different writing assignments that can be used in mathematics classes.

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The aim of this paper is to showcase a handful of mathematical challenges found in classical literature and to offer possible ways of integrating classical literature in mathematics lessons. We analyze works from a range of authors such as Jules Verne, Anton Chekhov, and others. We also propose ideas for further tasks. Most of the problems can be restated in terms of simple mathematical equations, and they can often be solved without a computer. Nevertheless, we use the computer program Mathcad
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Math Students’ Circles provide an opportunity for mathematicians to work in their communities to engage young students in mathematics as a human, aesthetic, and social endeavor. Sometimes referred to simply as Math Circles, these venues give mathematicians experience in introducing children to topics not typically seen in school curricula in an exciting, hands-on format. This article explores two Math Students’ Circles (MSCs) in the state of Colorado from the point of view of two pre-tenure
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1:42 AM | Mo’ Math Mo’ Fun!

A youth named Kartik encounters the National Museum of Mathematics in New York City.

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1:42 AM | G.H. Hardy: Mathematical Biologist

Godfrey Harold Hardy (1877-1947), the magnificent analyst who “discovered” the enigmatic Ramanujan and penned A Mathematician’s Apology, is most widely known outside of mathematics for his work in genetics. How did Hardy, described by his colleague C.P. Snow as “the purest of the pure,” become one of the founders of modern genetics? We explore this question in light of Hardy's own ideas about pure and elegant mathematics.

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1:42 AM | Mathematics: What Has It To Do With Me?

Mathematics teachers must have encountered the following question raised by students: “What is the use of mathematics?” Although the value of mathematics is not to be determined solely by its applications, to the general public this is a more important and more convincing facet of the subject. Nevertheless, this also brings up the corresponding query: is this subject being properly used? Does mathematics play a role in moral education?

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A link between proving and problem solving has been established in the literature [5, 21]. In this paper, I discuss similarities and differences between proving and problem solving using the Multidimensional Problem-Solving Framework created by Carlson and Bloom [2] with Livescribepen data from a previous study [13]. I focus on two participants’ proving processes: Dr. G, a topologist, and L, a mathematics graduate student. Many similarities between the framework and the proving processes of
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We derive the rational generating function that enumerates the angels and devils in M. C. Escher's Circle Limit IV according to their combinatorial distance from the six creatures whose feet meet at the center of the disk. This result shows that the base of the exponential rate of growth is 1.582... (the largest root of the polynomial 1 - z^2 - 2z^3 - z^4 + z^6).

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For many university students, the last formal experience in a mathematics classroom is a single semester “general education” mathematics class. Traditionally, students in this type of class often hold negative attitudes towards mathematics. Here I study a sample of students from this population (49 students at a large, urban, comprehensive public university enrolled in a “math for liberal arts majors” course) to research whether a positive experience in a freshman-level general
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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

gaussianos tweeted: @gaussianos

Finalistas de los Premios Bitácoras 2010 en la Categoría de Ciencia - #AntologíaGaussiana http://t.co/fNxdxx7Qpn

2015-08-01 14:59:58

profkeithdevlin tweeted: @profkeithdevlin

RT @CitizenMaths: On computer-based games in learning maths. Interesting (school-oriented) overview by @profkeithdevlin: http://t.co/27uk8R…

2015-08-01 14:58:59

evelynjlamb tweeted: @evelynjlamb

RT @AnnaWeltman: Sonobe! http://t.co/cSAfmdQwjT

2015-08-01 14:57:32

profkeithdevlin tweeted: @profkeithdevlin

Fans of @joboaler (there are many) will surely like my latest Devlin's Angle post on using video games in math class http://t.co/XzEvN62VlS

2015-08-01 14:48:06

profkeithdevlin tweeted: @profkeithdevlin

RT @RoundEdLearning: Great blog post on the importance of educational video games in the math classroom #gamechanger https://t.co/M9jYnIHTVP

2015-08-01 14:42:01

profkeithdevlin tweeted: @profkeithdevlin

RT @jordosh: The Real Problem With Education Is That We've Forgotten What It Means To Think http://t.co/HVWHSWUXKr

2015-08-01 14:41:47

profkeithdevlin tweeted: @profkeithdevlin

RT @SheckyR: MT @profkeithdevlin: Hard fun - video games creep into math classroom. New Devlin's Angle post http://t.co/VaiDg3V6J5 inspired…

2015-08-01 14:40:12

mathhombre tweeted: @mathhombre

2015-08-01 14:37:48

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