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6:44 PM | 다시 찾은 낙산공원 – 광각렌즈 사망

오랜만에 카메라와 렌즈를 꾸역꾸역 들고 우리 마을 뒷산인 낙산공원을 탐방하고 왔다. 나름 여기 주민인데 한 번 탐방해 줘야지..! 이번에는 혜화동 로터리와 한성대입구역 사이로 성곽길이 존재하길래 그 쪽으로 진입해 보았다. 아래는 구체적으로 이동한 경로: 성곽길을 따라 걷는데 오른쪽의 성곽보다는 왼쪽으로 보이는 … Continue reading →Related Posts ?[학교생활]
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There are two services offered by any publisher: to help you learn what others have written to help you show to others what you have written. These are the two sides of the publishing business. A long time ago, the main reason for the existence of publishers was to spread knowledge, i.e. to offer the … Continue reading The clients of publishers. Before: readers. Now: authors. →

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7:25 AM | Trees that represent bandwidth

In my algorithms class today, I covered minimum spanning trees, one property of which is that they (or rather maximum spanning trees) can be used to find the bottleneck in communications bandwidth between any two vertices in a network. Suppose the network edges are labeled by bandwidth, and we compute the maximum spanning tree using these labels. Then between any two vertices the path in this tree has the maximum bandwidth possible, among all paths in the network that connect the same two […]

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2:33 AM | New Australian data on the HMD

The Human Mortality Database is a wonderful resource for anyone interested in demographic data. It is a carefully curated collection of high quality deaths and population data from 37 countries, all in a consistent format with consistent definitions. I have used it many times and never cease to be amazed at the care taken to maintain […]

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These last few weeks the news has been full of lots of seemingly conflicting messages about renewables, so I figured it was worth talking about things a little bit in a post. First, the good news. The old conventional wisdom that solar can never match prices with conventional generation is just plain false at this […]

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4:28 PM | Composers You Should Know Part 3

My relationship to today’s composer is much different than the previous two. The previous ones I have been listening to and following for ten years or more. I found this one recently, because I was listening to Sirius XM’s classical … Continue reading →

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3:13 PM | L'Europa da ragione ai precari

Periodo instabile, questo. Quel che riesco a scrivere è tutto frutto di motivazioni così forti che, in un periodo più tranquillo avrebbero fruttato post a raffica. E' anche per questo (e non solo per non tenere fermo il blog troppo a lungo, come ultimamente) che pubblico questa news dall'Europa, giratami grazie a una mailing list di precari: La Corte di Giustizia Europea sbarra la strada al lavoro precario. Docenti e Ata della scuola con più di 36 mesi di servizio hanno diritto […]

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8:27 AM | Biking in Los Angeles

We are a few months into our grand Southern California experiment. So, I have had the time to get my bike fixed and use it for commuting. Los Angeles is really an amazing city for biking, in the sense that the weather is perfect for it throughout the year. Through Central LA the roads are flat and wide, and […]

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Have you ever noticed that some leading advocates of a statistical account, say a testing account A, upon discovering account A is unable to handle a certain kind of important testing problem that a rival testing account, account B, has no trouble at all with, will mount an argument that being able to handle that kind of problem […]

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6:49 PM | Differential Privacy Workshop in London

There will be a differential privacy workshop in London in April, accepting submissions soon. If you have something you are working on, consider submitting here. Some highlights:-- Although the workshop will not have proceedings (so you can as usual submit a talk and still submit it to a conference of your choosing), exceptional submissions will be invited to a special issue of the Journal of Privacy and Confidentiality.-- The PC is pretty inter-disciplinary. This is certainly not just a […]

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6:14 PM | Lecture videos from Trends in Logic XIV

Lecture videos from TiL XIV are now available here.

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2:25 PM | In breve: la cascata dei barioni

In maniera semplice si può parlare di meccanica quantistica nel momento in cui si descrivono le proprietà delle particelle utilizzando i numeri interi. Fatti quei primi passi all'inizio del XX secolo, come fisici abbiamo descritto le particelle utilizzando i così detti numeri quantici in grande abbondanza: la loro scoperta era sempre legata alla scoperta di nuovi decadimenti che non potevano essere altrimenti spiegati senza violare la conservazione di un qualche numero quantico […]

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8:12 AM | LIPIcs formatting tricks

If, like me, you're working on a SoCG submission, and this is the first time you've tried using the LIPIcs format that SoCG is now using, you may run into some minor formatting issues (no worse than the issues with the LNCS or ACM formats, but new and different). Here are the ones I've encountered, with workarounds where I have them:The LIPIcs format automatically includes several standard LaTeX packages including babel, amsmath, amsthm, amssymb, and hyperref. So there's no point in including
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6:00 AM | Thin folding

I have another new preprint on arXiv this evening: Folding a Paper Strip to Minimize Thickness, arXiv:1411.6371, with six other authors (Demaine, Hesterberg, Ito, Lubiw, Uehara, and Uno); it's been accepted at WALCOM.The basic goal of this is to try to understand how to measure the thickness of a piece of paper that has been folded into a shape that lies flat in the plane. For instance, in designing origami pieces, it's undesirable to have too much thickness, both because it wastes paper […]

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5:00 PM | Frankl, My Dear : 12

It is one of the rules of my system of general harmony, that the present is big with the future, and that he who sees all sees in that which is that which shall be. Leibniz • Theodicy Re: Dick … Continue reading →

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1:58 PM | Out the Window

The closing of MSR-SV two months ago raised a fair bit of discussion, and I would like to contribute some of my own thoughts. Since the topic of industrial research is important, I would like the opportunity to counter some misconceptions that have spread. I would also like to share my advice with anyone that (like me) is […]

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12:28 PM | More on Big Data

An earlier post, "Big Data the Big Hassle," waxed negative. So let me now give credit where credit is due.What's true in time-series econometrics is that it's very hard to list the third-most-important, or even second-most-important, contribution of Big Data. To a good approximation, there aren't any. Which makes all the more remarkable the mind-boggling -- I mean completely off-the-charts -- success of the first-most-important contribution: volatility estimation from high-frequency […]

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Last Friday, the 4th Integrated Mathematical Oncology Workshop finished here at Moffitt. The event drew a variety of internal and external participants — you can see a blurry photo of many of them above — and was structured as a competition between four teams specializing in four different domains: Microbiome, Hepatitis C, Human papillomavirus, and […]

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The WWW is an Internet system, based on the following ingredients: web pages (written in html) a (web) browser a web server (because of the choice of client-server architecture) Tim Berners-Lee wrote those programs. Then the WWW appeared and exploded. The force behind this explosion comes from the separation of the system into independent parts. … Continue reading Mol language and chemlambda gui instead of html and web browsers gives new Net service? →

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5:57 AM | The Modular Forms Database is Annoying

It used to be the case, 10 or so years ago, that William Stein maintained a website with extensive tables of -expansions of modular forms, computed using magma. However, as the edifice of civilization begins to crumble, this website no … Continue reading →

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There is now a I can be an engineer Barbie. That sounds good! It's not. Imagine how this could be turned around and made sexist. What you are imagining might not be as bad as the reality. Depends on your imagination.
Guest Blogger Brittany Terese Fasy explains:
Remember the controversy over the Barbie doll that said
"Math class is tough!"? Well, Barbie strikes again.
If you haven't heard about II can be a computer engineer it is a story about how Barbie, as a "computer engineer" […]

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In analytic number theory, an arithmetic function is simply a function from the natural numbers to the real or complex numbers. (One occasionally also considers arithmetic functions taking values in more general rings than or , as in this previous blog post, but we will restrict attention here to the classical situation of real or […]

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Suppose we have a $2\times 2$ matrix $$ M = \begin{pmatrix} x_{11} & x_{12}\\ x_{21} & x_{22} \end{pmatrix} $$ with entries in a field $F$. The characteristic polynomial of this matrix is $p(t) := {\rm det}(tI_2 – M) = t^2 – (x_{11} + x_{22})t + x_{11}x_{22} – x_{21}x_{12}$. One might ask: how can we produce […]

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9:28 PM | A brief history of video game graphics

Part 1: Pixel PioneersPart 2: Sprite SupremePart 3: Polygon RealmPart 4: Voodoo BloomPart 5: Future Crisis

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8:06 PM | Bell’s inequality 50 years later

This is a jubilee year.* In November 1964, John Bell submitted a paper to the obscure (and now defunct) journal Physics. That paper, entitled “On the Einstein Podolsky Rosen Paradox,” changed how we think about quantum physics. The paper was … Continue reading →

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8:00 PM | Frankl, My Dear : 12

It is one of the rules of my system of general harmony, that the present is big with the future, and that he who sees all sees in that which is that which shall be. Leibniz • Theodicy Re: Dick … Continue reading →

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A NYT op-ed the other day,”How Medical Care Is Being Corrupted” (by Pamela Hartzband and Jerome Groopman, physicians on the faculty of Harvard Medical School), gives a good sum-up of what I fear is becoming the new normal, even under so-called “personalized medicine”. “It is obsolete for the doctor to approach each patient strictly as an individual; medical decisions should […]

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1:31 PM | The globe of Galileo

video by @ulaulaman #levitation Published by Gianluigi (@ulaulaman) in data: Nov 11, 2014 at 4:41 PSTIt's just a little Earth, turns and levitates above its base, reminding those who contributed to give it its rightful place in space. The globe can light up using the switch on the base. It works in the current network.

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12:57 AM | A general parity problem obstruction

Many problems and results in analytic prime number theory can be formulated in the following general form: given a collection of (affine-)linear forms , none of which is a multiple of any other, find a number such that a certain property of the linear forms are true. For instance: For the twin prime conjecture, one […]

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Method from CS have enabled new understanding of topics in game theory and economics, but have been explored only for a small collection of subareas of game theory and economics. There may be opportunities more broadly and especially in areas that computer scientists would not naturally explore on their own. The following workshop is a […]

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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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gaussianos tweeted: @gaussianos

RT @mezvan: Guardar esta imagen para septiembre de cada año .. y publicarla ... gracias ... http://t.co/PnocgQbPmU

2014-11-28 05:15:00

DrMathochist tweeted: @DrMathochist

RT @Charalanahzard: Sometimes young boys on Facebook send me rape threats, so I've started telling their mothers. http://t.co/0Cbs81eXiE

2014-11-28 05:04:13

profkeithdevlin tweeted: @profkeithdevlin

RT @TeaPartyCat: It’s TOO SOON. Too soon after #Thanksgiving dinner to talk about portion control.

2014-11-28 04:28:09

Quasilocal tweeted: @Quasilocal

@fwoodhouse I prefer the term "morons"

2014-11-28 03:57:50

Quasilocal tweeted: @Quasilocal

.@reasonable_hank @UOW I sincerely hope there is an official response to all her dangerous anti-vaccination propaganda parading as research

2014-11-28 03:48:50

Quasilocal tweeted: @Quasilocal

RT @reasonable_hank: Claim of academic misconduct lodged against @UOW vaccination sceptic http://t.co/xAD7QA57pg #StopAVN #health #antivax

2014-11-28 03:47:12

MindAfterMath tweeted: @MindAfterMath

Learn Duality in Linear Programming http://t.co/8JmpxiszaU #compsci #datascience #math #stem #mathchat

2014-11-28 03:18:43

Quasilocal tweeted: @Quasilocal

2014-11-28 03:03:24

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