Posts

August 05, 2014

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7:59 PM | Panel discussion on writing for developers
AirPair is hosting a panel discussion entitled Developer Writing Tips & Tricks as part of AirConf on August 25. I’ll be one of the panelists. The AirConf events will be broadcast via G+ hangouts.
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4:50 PM | JSM 2014, Boston
Filed under: pictures, Statistics, Travel
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2:12 PM | Using Three.js to Create Vector-Graphics from 3D-Visualizations Right in Your Browser
When you want to prepare your 3D visualizations for publication in print/PDF you typically want to convert them into a vector graphics format. Three.js is a JavaScript library for creating 3D graphics that can be easily used to create vector graphics images in SVG format from 3D visualizations. Here is an example of how to achieve this – and you can modify the example right in your browser! The Story Last year, I created a 3D-visualization of the greatest commond divisor function. […]
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1:28 PM | When doing scientific replication or criticism, collaboration with the original authors is fine but I don’t think it should be a requirement or even an expectation
Dominik Papies points me to this article, “Matched-Names Analysis Reveals No Evidence of Name-Meaning Effects,” by psychologist and data detective Uri Simonsohn, in collaboration with Raphael Silberzahn and Eric Luis Uhlmann, the two authors of an earlier study that this new report is refuting. Papies writes: This seems to me an interesting case where a […] The post When doing scientific replication or criticism, collaboration with the original authors is fine but I […]
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11:53 AM | Finiremo cancellati da un'enorme flatulenza
Il titolo del post è un tweet di Massimiliano Tanzini a commento della scoperta di un enorme sbuffo di metano che dal mare siberiano è finito nell'atmosfera terrestre: (mega fiammata di metano sul pendio di Laptev Mare, a circa 62 m di profondità)Stiamo "annusando" il metano. Ne vediamo le bolle nel video della telecamere montata sul CTD, o il Multicorer. Tutte le analisi ci raccontano i segni. Ci troviamo dentro una mega fiammata. La vediamo nella colonna d'acqua, la […]

August 04, 2014

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10:14 PM | likelihood-free inference via classification
Last week, Michael Gutmann, Ritabrata Dutta, Samuel Kaski, and Jukka Corander posted on arXiv the last current of the paper they had presented at MCMSki 4. As indicated by its (above) title, it suggests implementing ABC based on classification tools. Thus making it somewhat connected to our recent random forest paper. The starting idea in […]
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8:17 PM | You used to be a feminist before you got pregnant
Today I’d like to rant about a pattern I’ve noticed. Namely, I have a bunch of female friends and acquaintances that I consider feisty, informed, and argumentative sorts. People who are fun to be around and who know how to stick up for themselves, know how to spot misogyny and paternalism in all contexts, and […]
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6:33 PM | Generalized Venn diagram for genetics
by @ulaulaman http://t.co/MkGI7L546N #VennDay #VennDiagram #genetics A generalized Venn diagram with three sets $A$, $B$ and $C$ and their intersections. From this representation, the different set sizes are easily observed. Furthermore, if individual elements (genes) are contained in more than one set (functional category), the intersection sizes give a direct view on how many genes are involved in possibly related functions. During optimization, the localization of the circles is altered to […]
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6:22 PM | La congettura di Rota
Attenzione: i contenuti sono abbastanza avanzati, più del solito. Forse anche la semplificazione non è così... semplice. Ad ogni modo, spero ci proviate lo stesso a leggerlo tutto, o almeno solo un pochino!Uno degli aspetti più interessanti dei matematici moderni, soprattutto di quelli di qualità, è la loro capacità di cogliere gli aspetti in comune tra branche apparentemente distanti tra loro. E' in effetti il caso della storia dietro la […]

Whitney H. (1931). Non-Separable and Planar Graphs., Proceedings of the National Academy of Sciences of the United States of America, 17 (2) 125-127. PMID: http://www.ncbi.nlm.nih.gov/pubmed/16587624

Whitney, Hassler (1935). On the Abstract Properties of Linear Dependence, American Journal of Mathematics, 57 (3) 509-533. DOI: 10.2307/2371182

Tutte, W. T. (1959). Matroids and graphs, Transactions of the American Mathematical Society, 90 (3) 527-527. DOI: 10.1090/S0002-9947-1959-0101527-3

Jim Geelen, Bert Gerards & Geoff Whittle (2014). Solving Rota's Conjecture, Notices of the American Mathematical Society, 61 (07) 736-743. DOI: 10.1090/noti1139

Citation
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3:46 PM | John Venn is 180
Today is the 180th Birthday of John Venn, inventor of the often-misused mathematical staple the Venn Diagram. In celebration, Google have made today’s Google Doodle be a playful interactive toy where you can select two categories and it’ll show you something in the intersection. Here’s some of our other favourite Venn diagrams from the internet: ‘Math’,... Read more »
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3:26 PM | Correlation does not even imply correlation
The above title is my response to a discussion that began with this email sent to be by Steve Roth: Noah Smith had a great tweet recently, a real keeper for me [Roth]. Causation is correlated with correlation. I would reword it: Correlation correlates with causation. (Just not very much.) And I wonder if the […] The post Correlation does not even imply correlation appeared first on Statistical Modeling, Causal Inference, and Social Science.
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2:20 PM | it’s still safe to fly
Despite terrifying headlines like “2014 could be worst year for plane crash deaths in almost a decade,” it’s quite safe to fly. Operations research has played a role in demonstrating aviation safety over the years. Professor Arnie Barnett at MIT is a leading authority in aviation safety, and he has published several papers on this topic […]
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1:00 PM | On deck this week
Mon: Correlation does not even imply correlation Tues: When doing scientific replication or criticism, collaboration with the original authors is fine but I don’t think it should be a requirement or even an expectation Wed: Scientific communication by press release Thurs: Nate Silver’s website Fri: Estimated effect of early childhood intervention downgraded from 42% to […] The post On deck this week appeared first on Statistical Modeling, Causal Inference, and Social Science.
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11:33 AM | Engineering a waterpark
This weekend my family went to Schlitterbahn, a waterpark in New Braunfels, Texas. (The German-sounding name of the park and the city are evidence of the large number of Germans that settled in this part of Texas.) I thought about several engineering questions while we were there. Most of the rides involve sitting in an […]

August 03, 2014

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10:14 PM | a thesis on random forests
During a session of the IFCAM workshop this morning I noticed a new arXiv posting on random forests. Entitled Understanding Random Forests: From Theory to Practice, it actually corresponds to a PhD thesis written by Gilles Louppe on the topic. At the Université de Liège, Belgie/Belgium/Belgique. In this thesis, Gilles Louppe provides a rather comprehensive […]
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9:48 PM | “…realigning the heavens with a single stroke of the brush.“ – Really?
Recently on twitter I stumbled across a problematic discussion, as to which single image had most changed the course of science. Although the various participants made stimulating and interesting suggestions, Darwin’s tree diagram, Franklin’s photo of DNA etc. I found … Continue reading →
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9:06 PM | Rischio e dissesto idrogeologico in Italia
(vedi infografica completa)Innanzitutto per farsi un'idea del territorio italiano: L'assetto idrogeologico del territorio italiano: risorse e problematiche di M. V. Civita, febbraio 2008 (pdf)Quindi: Floris, M., D'Alpaos, A., De Agostini, A., Stevan, G., Tessari, G., & Genevois, R. (2012) A process-based model for the definition of hydrological alert systems in landslide risk mitigation. Natural Hazards and Earth System Science, 12(11), 3343-3357L'articolo prova a sviluppare un modello di […]
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6:49 PM | Browsers should be commodities
I think there is a world market for maybe five browsers — not Thomas J. Watson As my one two regular readers know, I work for a project that’s all about cross-browser support. It might, therefore, not come as a …

August 02, 2014

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11:34 PM | July Favorites
This month was so loooong, not exactly in a bad way, but I had extra time at work, there were some interesting events, and it seems that I (sort of) decided what I will do with my life in my … Continue reading →
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10:14 PM | Bangalore workshop [ಬೆಂಗಳೂರು ಕಾರ್ಯಾಗಾರ]
As I am now back home after a rather lengthy and somewhat eventful trip [getting too early to Bangalore airport with 3 hours to spend in the nice and very quiet lounge, followed by another 5 hour wait in the very nice but no so quiet Bombay airport lounge, no visit to the cockpit this […]
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7:08 PM | Cerchio perfetto
Cerchio perfetto rotondola lunaNel centro del cieloJack Kerouac via JoAnne GrowneyIllustrazione di B. E. Pike tratta da The Wonderland of Science di J. C. Sanford, via nemfrogP.S.: non frequentando spesso Google Plus, mi ero perso una notizia che, invece, è perfetta abbinata a questo haiku di Kerouac (letta la recensione de I sotterranei di mia sorella?). Su Il Sole 24 Ore, infatti, Leopoldo Benacchio riferisce che la forma della Luna non è sferica ma piuttosto quella di un […]
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2:06 PM | Aunt Pythia’s advice
Hello and good morning! Aunt Pythia is feeling well-slept (thankfully!) and happy to be here. Another Saturday morning means – yes – another ride on the Aunt Pythia advice bus, which is leisurely rolling out of the parking lot with a full pot of fresh brewed coffee ready. Can you smell it, people?!! Plus, there’s […]
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12:18 PM | Bangalore snapshot [ಬೆಂಗಳೂರು ಚಿತ್ರ]
  Filed under: pictures, Travel Tagged: Bangalore, India, Kannada, Karnataka, KR Market, storm
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3:31 AM | Wrestling with Tight Spans
A geometric construction, used in combinatorial optimization and phylogenetic analysis, interpreted categorically.

August 01, 2014

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10:14 PM | France goes to war…
Filed under: Books, pictures
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4:42 PM | L'imprevedibile viaggio di Harold Fry
Quando lessi sul web la trama di questo libro mi incuriosì molto. Un giorno, mentre perdevo tempo in libreria, lo vidi (anche scontato) e lo comprai. Dopo un po' di mesi che rimase nella libreria di casa in attesa di essere aperto mi decisi a leggerlo, aspettandomi qualcosa di eclatante.La storia parla di Harold, un uomo pensionato, che un giorno riceve una lettera da una sua amica (ed ex collega) in cui gli dice che sta per morire. Lui scrive una lettera di risposta ed esce ad […]
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2:46 PM | I rompicapi di Alice: La curva di Carroll
Un rompicapo semplice e veloce, in una parola: estivo.In Mathematical Recreations of Lewis Carroll: Pillow Problems and a Tangled Tale è presente il seguente problema: Se si pone un tetraedro regolare, con un vertice verso il basso, su un perno che vi si adatta esattamente, e viene fatto ruotare attorno al suo asse verticale, di un angolo di 120°, sollevandolo solo quando necessario, fino ad inserirsi nuovamente nel perno: trovare il luogo dei punti di uno dei vertici rotanti.La […]
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1:37 PM | Turing's morphogenesis and the fingers' formation
by @ulaulaman http://t.co/9Q5rVkVzEc about #Turing #morphogenesis On today Science's issue it is published a paper about the application of Turing's morphogenesis to the formation of fingers. In this period I'm not able to download the papers, so I simple publish the editor's summaries. First of all I present you the incipit of the paper by Aimée Zuniga, Rolf Zeller(2)Alan Turing is best known as the father of theoretical computer sciences and for his role in cracking the Enigma […]
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1:12 PM | The “scientific surprise” two-step
During the past year or so, we’ve been discussing a bunch of “Psychological Science”-style papers in which dramatic claims are made based on somewhat open-ended analysis of small samples with noisy measurements. One thing that comes up in some of these discussions is that the people performing the studies say that they did not fish […] The post The “scientific surprise” two-step appeared first on Statistical Modeling, Causal Inference, and Social Science.
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12:18 PM | marriage with data
Filed under: Kids, pictures, Travel Tagged: add, Bangalore, big data, India, matchmaking
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