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I’ve been an editor of JSS for the last few years, and as a result I tend to get email from people asking me about publishing papers describing R packages in JSS. So for all those wondering, here are some general comments. JSS prefers to publish papers about packages where the package is on CRAN and has been there long enough to have matured (i.e., obvious bugs ironed out and a few active users). This is partly because we have so many submissions that it helps to filter some out and this […]

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5:32 AM | NASA Space Crews

In the Apollo missions many of the crew were experienced, but some were
not. So I drew a diagram - see what patterns you see.

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5:32 AM | Software Checklist

During the second World War, fighter pilots would scramble to take off.
Their heart would stop when the engine mis-fired. Was the fuel mix too
rich, or too lean? Turn the control wrong way and they could die ...

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The last of the three examples involving the composition of triadic relatives with dyadic relatives is shown again in Figure 25. (25) The hypergraph picture of the abstract composition is given in Figure 26. (26) This example illustrates the way that Peirce … Continue reading →

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9:55 PM | [기노사키 온천여행 05] 소토유메구리(外湯めぐり) 시전

기노사키 온천 마을 여행에서 꼭 해야 할 과제가 있다면 바로 소토유메구리(外湯めぐり)이다. 말 그대로 기노사키 온천의 7개 온천을 돌아다니며 온천에 몸을 담구는 것. 이 때에는 유타카를 입고 돌아다니는 것이 아주 편하다(물론 평상복으로 돌아다니는 사람도 많고 크게 문제는 없다). 7개의 소토유들은 … Continue reading →Related Posts ?[교토 쿠라마 여행 05] 쿠라마
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We are pleased to announce our guest at Thursday’s seminar (April 24, 2014): “Statistics and Scientific Integrity”: S. Stanley Young, PhD Assistant Director for Bioinformatics National Institute of Statistical Sciences Research Triangle Park, NC The main readings for the discussion are: Young, S. & Karr, A. (2011). Deming, Data and Observational Studies. Signif. 8 (3), 116–120. […]

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Because zipper logic is a graph rewriting system which does not use variable names, just like GLC and chemlabda, it needs ways to multiply, distribute or kill things. See Chemlambda, universality and self-multiplication for multiplication, distribution or propagation phenomena. In this post we shall see how zipper combinators die or are born, depending on the sense […]

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The use of the concepts of identity and teridentity is not to identify a thing-in-itself with itself, much less twice or thrice over — there is no need and therefore no utility in that. I can imagine Peirce asking, on Kantian … Continue reading →

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There’s a critical transition point that we find in sight of Peirce’s 1870 Logic of Relatives and it’s a point that turns on the teridentity relation. In taking up the next example of relational composition, let’s substitute the relation for … Continue reading →

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8:18 PM | Drexel on Monday 4/28

Looks interesting if you're in the area. I plan to be at the lunch.From: Drexel University's LeBow College of Business <announce@lebow.drexel.edu>Date: Thu, Apr 17, 2014 at 11:14 AMSubject: School of Economics Presents: 2 Presentations by Dr. Preston McAfee, Director, Google Strategic Technologies: 4.28.14 Please join Drexel School of Economics for one or both of the two presentations that will be given by Dr. Preston McAfee, Director, Google Strategic
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12:49 PM | ESF workshop Glasgow – 16th-18th June 2014

Thanks to the kind support of the European Science Foundation the University of Glasgow will be hosting a workshop in June focused on reconnection events in classical, quantum and classical fluids. Reconnections are dramatic events, leading to irreversible changes in the topology of a system. In particular they are crucial in understanding magnetic fields in rarefied plasmas, […]

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The organizers of the AdAuctions workshop have extended the submission deadline to April 27. Updated information on the workshop is as follows. The Tenth Ad Auction Workshop (here is the call for papers) Date: June 8, 2014, 8:30-15:30 Submission deadline: April 27, 2014, (23:59 Hawaii time) Organizing Committee: adauctions2014@gmail.com Itai Ashlagi (MIT Sloan) Patrick Jordan […]

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Alcuni giorni fa, la missione Kepler ha annunciato la scoperta di un nuovo pianeta extrasolare, Kepler-186f, che è risultato roccioso e molto simile alla Terra non solo per dimensioni, ma anche per posizione e distanza dalla stella intorno cui ruota, Kepler-186, una nana rossa di classe M1 che si trova a circa 500 anni luce dal nostro pianeta. L'annuncio è stato accompagnato anche da un articolo su Science, che però è stato anche reso disponibile dalla Nasa in formato pdf. (i pianeti in
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We interspersed key issues from the reading for this session (from Howson and Urbach) with portions of my presentation at the Boston Colloquium (Feb, 2014): Revisiting the Foundations of Statistics in the Era of Big Data: Scaling Up to Meet the Challenge. (Slides below)*. Someone sent us a recording (mp3)of the open-ended panel discussion from that Colloquium including: Mayo, Xiao-Li Meng (Harvard), Kent Staley […]

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12:33 AM | Seven forecasting blogs

There are several other blogs on forecasting that readers might be interested in. Here are seven worth following: No Hesitations by Francis Diebold (Professor of Economics, University of Pennsylvania). Diebold needs no introduction to forecasters. He primarily covers forecasting in economics and finance, but also xkcd cartoons, graphics, research issues, etc. Econometrics Beat by Dave Giles. Dave is a professor of economics at the University of Victoria (Canada), formerly from my own […]

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I am teaching the undergrad jr/sr course Elementary Theory of Computation
which is Reg Langs, Context free Langs, Computability theory, P and NP.
Over the last few years I've changed some of the content (I dumped CFLs-- don't worry, they cover them some in the Prog Langs course) but more to my point today changed the ORDER I do things in
Change 1: Do P and NP first and Computability later. While this is not historically accurate (which may be why the order was what it was)
this is […]

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9:00 PM | Seymour’s 1-flowing conjecture I

Let $G$ be a graph with distinct vertices $s$ and $t$, and let $\mathcal{C}$ be the family of paths from $s$ to $t$. Let us say that a subfamily of $\mathcal{C}$ is a matching if its members are pairwise edge-disjoint. … Continue reading →

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I just added a new article to Wikipedia on indifference graphs (also known as unit interval graphs or proper interval graphs): the graphs formed from sets of points on the real line by connecting every two points whose distance is less than one.There are many papers on algorithms for going from the graph to a geometric representation in linear time. The following method for the reverse problem, going from the set of points (or equivalently unit intervals) to its graph must be known, possibly in […]

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6:14 PM | A TED experience

Around one year ago, I unexpectedly received an e-mail asking if I would speak at a local TEDx Youth event themed “Daring Discoveries”. I hadn’t attended a TEDx conference before (sadly I couldn’t make either of the previous ones held … Continue reading →

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Two years ago, Greenpeace put out a report titled “How clean is your cloud,” taking many of the IT giants to task for their lack of commitment to sustainability in their data centers. Now, a few years later, Greenpeace is still at it and has been pushing hard with a mixture of yearly public praise/shaming […]

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Kaggle competitions are potentially pretty cool. Kaggle supplies in-sample data ("training data"), and you build a model and forecast out-of-sample data that they withhold ("test data"). The winner gets a significant prize, often $100,000.00 or more. Kaggle typically runs many such competitions simultaneously.The Kaggle paradigm is clever because it effectively removes the ability for modelers to peek at the test data, which is a key criticism of model-selection procedures that claim to […]

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4:39 AM | A Preview of Barbados/Bellairs

This post is probably not so interesting unless you plan to travel to the Caribbean in a few weeks. The website for the conference is offline, so I thought I might update attendees on what might be happening, at least … Continue reading →

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A large chunk of machine learning (although not all of it) is concerned with predictive modeling, usually in the form of designing an algorithm that takes in some data set and returns an algorithm (or sometimes, a description of an algorithm) for making predictions based on future data. In terminology more friendly to the philosophy […]

Bailey, D., Borwein, J., de Prado, M.L. & Zhu, Q. (2014). Pseudo-Mathematics and Financial Charlatanism: The Effects of Backtest Overfitting on Out-of-Sample Performance, Notices of the American Mathematical Society, 61 (5) 458. DOI: 10.1090/noti1105

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I have just posted online a new survey “Sum-of-Squares proofs and the quest toward optimal algorithms” co-authored with David Steurer . The survey discusses two topics I have blogged about before – Khot’s Unique Games Conjecture (UGC) and the Sum-of-Squares (SOS) method – and the connections between them. Both are related to the notion of meta algorithms. […]

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9:28 PM | What’s it about women and science?

Simplistic, but quite to the point… “I’ve never been female, but I’ve been black all my life and so let me perhaps offer some insight from that perspective. I got to see how the world around me reacted to my expressions of these ambitions. All I can say that is the fact that I wanted […]

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8:04 PM | Teach Yourself Logic, new layout

The Teach Yourself Logic Guide has a new look. Now, instead of being a standard A4 PDF, it should be an ideal size for reading on screen. Read it either (i) on an iPad (download in Safari, open e.g. in … Continue reading →

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This section is devoted to studying the Gaussian Isoperimetric Inequality. This inequality is a special case of the Borell Isoperimetric Inequality (and hence also a special case of the General-Volume Majority Is Stablest Theorem); in particular, it’s the special case arising from the limit $\rho \to 1^{-}$. Restating Borell’s theorem using rotation sensitivity [...]

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Four years ago, many of us were glued to the “spill cam” showing, in real time, the gushing oil from the April 20, 2010 explosion sinking the Deepwater Horizon oil rig in the Gulf of Mexico, killing 11, and spewing oil until July 15.(Remember junk shots, top kill, blowout preventers?)[1] The EPA has lifted its gulf drilling ban on BP just […]

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9:42 PM | [기노사키 온천여행 04] 유카타를 입은 사람들 – 늦은 오후의 거리

료칸 미키야에서 체크인을 끝내고 밖으로 나와 봤습니다. 외양 온천 메구리를 즐기기 전에 일단 마을의 이곳저곳을 좀 돌아다녀 보기 위해서… 역시 평상복을 입고 돌아다니는 사람들보다 유카타를 걸치고 있는 사람들이 훨씬 많았습니다. 유카타를 보면 머물고 있는 료칸이 어딘지도 알 수 있죠! 7개의 … Continue reading →Related Posts ?[교토 쿠라마 여행 05] 쿠라마 온천
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9:07 PM | Structures in solution spaces

As I promised earlier, here is the video for my talk on "structures in solution spaces" at the Conference on Meaningfulness and Learning Spaces last February.It was a wide-ranging talk, about learning spaces, distributive lattices and Birkhoff's representation theorem for them, rectangular cartograms, antimatroids, the 1/3-2/3 conjecture for partial orders and antimatroids, partial cubes, and flip distance in binary trees and point sets. It was also about an hour long, so don't watch unless you […]

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A large chunk of machine learning (although not all of it) is concerned with predictive modeling, usually in the form of designing an algorithm that takes in some data set and returns an algorithm (or sometimes, a description of an algorithm) for making predictions based on future data. In terminology more friendly to the philosophy […]

Bailey, D., Borwein, J., de Prado, M.L. & Zhu, Q. (2014). Pseudo-Mathematics and Financial Charlatanism: The Effects of Backtest Overfitting on Out-of-Sample Performance, Notices of the American Mathematical Society, 61 (5) 458. DOI: 10.1090/noti1105

Citation

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Here the monotonicity of the EM algorithm is established. $$ f_{o}(Y_{o}|\theta)=f_{o,m}(Y_{o},Y_{m}|\theta)/f_{m|o}(Y_{m}|Y_{o},\theta)$$ $$ \log L_{o}(\theta)=\log L_{o,m}(\theta)-\log f_{m|o}(Y_{m}|Y_{o},\theta) \label{eq:loglikelihood} $$ where \( L_{o}(\theta)\) is the likelihood under the observed data and \(L_{o,m}(\theta)\) is the likelihood under the complete data. Taking the expectation of the second line with respect to the conditional distribution of
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Ruslan R Salakhutdinov, Sam T Roweis & Zoubin Ghahramani (2012). On the Convergence of Bound Optimization Algorithms, arXiv, arXiv: 1212.2490v1

Wu C.F.J. (1983). On the Convergence Properties of the EM Algorithm, The Annals of Statistics, 11 (1) 95-103. DOI: 10.1214/aos/1176346060

McLachlan G. & Peel D. DOI: 10.1002/0471721182

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by @ulaulaman about #exoplanets #planetary_transit #kepler_mission #nasa #astronomy The search for extrasolar planets (or exoplanets) had its first success in 1991 with the discovery of some planets orbiting around the pulsar PSR1257+12(1, 2, 3), measuring the variations of the radio pulses coming from the star. The second important milestone in exoplanet research takes place in 1995, with the discovery around the star 51 Pegasi (a star like our Sun) of a Jupiter-like planet, found at a […]

Wolszczan, A. & Frail, D. (1992). A planetary system around the millisecond pulsar PSR1257 + 12, Nature, 355 (6356) 145-147. DOI: 10.1038/355145a0

Wolszczan, A. (1994). Confirmation of Earth-Mass Planets Orbiting the Millisecond Pulsar PSR B1257 + 12, Science, 264 (5158) 538-542. DOI: 10.1126/science.264.5158.538

Mayor, M. & Queloz, D. (1995). A Jupiter-mass companion to a solar-type star, Nature, 378 (6555) 355-359. DOI: 10.1038/378355a0

Borucki, W., Koch, D., Basri, G., Batalha, N., Brown, T., Caldwell, D., Caldwell, J., Christensen-Dalsgaard, J., Cochran, W., DeVore, E. & Dunham, E. (2010). Kepler Planet-Detection Mission: Introduction and First Results, Science, 327 (5968) 977-980. DOI: 10.1126/science.1185402

Lissauer, J., Fabrycky, D., Ford, E., Borucki, W., Fressin, F., Marcy, G., Orosz, J., Rowe, J., Torres, G., Welsh, W. & Batalha, N. (2011). A closely packed system of low-mass, low-density planets transiting Kepler-11, Nature, 470 (7332) 53-58. DOI: 10.1038/nature09760

George, S. (2011). Extrasolar planets in the classroom, Physics Education, 46 (4) 403-406. DOI: 10.1088/0031-9120/46/4/004

LoPresto, M. & McKay, R. (2005). An introductory physics exercise using real extrasolar planet data, Physics Education, 40 (1) 46-50. DOI: 10.1088/0031-9120/40/1/003

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Non voglio fare concorrenza alla splendida spiegazione di Amedeo o a quella tecnica di Corrado, ma mia sorella, leggendo il post di pancia scritto nella sera dell'annuncio di BICEP2, ha candidamente confessato di non aver capito cosa era accaduto quel giorno. E allora proviamoci, a raccontarlo. (da The Cartoon History of the Universe #1 di Larry Gonick)C'era una volta un'idea di universo, che era la Terra al centro, quindi il Sole, la Luna e gli altri pianeti e sullo sfondo le stelle fisse,
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Hubble E. (1929). A relation between distance and radial velocity among extra-galactic nebulae, Proceedings of the National Academy of Sciences, 15 (3) 168-173. DOI: 10.1073/pnas.15.3.168

Gamow G. (1948). The Evolution of the Universe, Nature, 162 (4122) 680-682. DOI: 10.1038/162680a0

Alpher R.A. & Herman R. (1948). Evolution of the Universe, Nature, 162 (4124) 774-775. DOI: 10.1038/162774b0

Alpher R., Bethe H. & Gamow G. (1948). The Origin of Chemical Elements, Physical Review, 73 (7) 803-804. DOI: 10.1103/PhysRev.73.803

Peebles P.J.E., Schramm D.N., Turner E.L. & Kron R.G. (1994). The Evolution of the Universe, Scientific American, 271 (4) 52-57. DOI: 10.1038/scientificamerican1094-52

McLeish T.C.B., Bower R.G., Tanner B.K., Smithson H.E., Panti C., Lewis N. & Gasper G.E.M. (2014). History: A medieval multiverse, Nature, 507 (7491) 161-163. DOI: 10.1038/507161a

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Much of my undergrad was spent studying physics, and although I still think that a physics background is great for a theorists in any field, there are some downsides. For example, I used to make jokes like: “soft isn’t the opposite of hard sciences, easy is.” Thankfully, over the years I have started to slowly […]

Lazer, D., Kennedy, R., King, G. & Vespignani, A. (2014). Big data. The parable of Google Flu: traps in big data analysis., Science, 343 (6176) 1203-1205. PMID: 24626916

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gaussianos tweeted: @gaussianos

Captcha matemático extremo (II) - #AntologíaGaussiana http://t.co/M7CLUBD8ok

2014-04-24 12:02:51

MindAfterMath tweeted: @MindAfterMath

2014-04-24 12:01:24

profkeithdevlin tweeted: @profkeithdevlin

@j_lanier I don't think I can make it in person, I'm afraid, but I just tweeted about it.

2014-04-24 11:53:54

profkeithdevlin tweeted: @profkeithdevlin

Coming up for any young math lovers in the Princeton area http://t.co/RpcoOToD1N @Princeton

2014-04-24 11:51:36

loronegro tweeted: @loronegro

Un buen estirón es como una pequeña venida.

2014-04-24 11:39:47

JohnDCook tweeted: @JohnDCook

"Exponential" does not mean "fast." Exponential growth can be painfully slow at first.

2014-04-24 11:38:32

gaussianos tweeted: @gaussianos

Hat puzzles http://t.co/fSR93GztJn de Tanya Khovanova. Problemas lógicos sobre sombreros (vía @emulenews)

2014-04-24 11:19:26

gaussianos tweeted: @gaussianos

Esta tarde estaré en la gala de los @Premios20Blogs como finalista de la categoría "Ciencia, Tecnología e Internet". Allí nos vemos :)

2014-04-24 11:17:18

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