Mathblogging.orgRecent Postshttp://www.mathblogging.org/scripts/feed.php2014-10-25T00:10:44-04:00No copyright asserted over individual posts; see original posts for copyright and/or licensing.Mathblogging.org Atom serializerA Trip to the Capitolhttp://www.mathblogging.org/post/1023062014-10-24T16:35:18-04:00Pam WilsonThursday was gorgeous. A road trip north to our state capitol, Frankfort, with my husband and my superintendent. Ashland Inc. Teacher Achievement Awards…and I was 1 of 24!!! I debated on whether or not to post, but I am proud of my work in education and why not celebrate it! I teared up multiple times […]Rule of Thumb for Wood Shrinkagehttp://www.mathblogging.org/post/1023032014-10-24T16:05:23-04:00mathscinotesIntroduction As winter comes, I often see homes where gaps develop in the wood flooring, molding, or ceilings (Figure 1). While I have never actually spent any time investigating the mechanism of wood’s movement or magnitude, I see its affect … Continue reading →Book: "Foundations of Data Science" by John Hopcroft and Ravindran Kannanhttp://www.mathblogging.org/post/1023012014-10-24T15:57:00-04:00Igor I just found out about a draft version of "Foundations of Data Science" a new book by John Hopcroft and Ravindran Kannan and very much like chapter 7 through 10 that touches upon themes we talk about often here on Nuit Blanche: Compressive Sensing ( see also The Big Picture in Compressive Sensing) , Advanced Matrix Factorization (see also the Advanced Matrix Factorization Jungle Page), complexity, streaming/sketching issues and Randomized Numerical Linear Algebra, Machine Learning and
[…]Some Weekly Pickshttp://www.mathblogging.org/post/1023052014-10-24T15:55:00-04:00"Shecky Riemann"Another jumble of links from the week gone by:
1) Okay, he may not be Martin Gardner, but Mike Lawler has been compiling quite a body of digital work week after week after week (both written and video). I'm astounded by his output, and don't even have time to catch it all, but here's one contribution from last week (...and seriously, if you're a math teacher or a parent you ought be FOLLOWINGBuzzmath Friday at Philippa Schuyler Intermediate Schoolhttp://www.mathblogging.org/post/1023042014-10-24T15:49:31-04:00alisonThe Buzzmath team was back in NYC last week to collaborate with teachers and other ed tech developers as part of the NYC DOE Innovation Zone Short Cycle Evaluation. While there, we had the opportunity to talk with the students, teachers and administrators at the Philippa Schuyler Intermediate School. Students were eager to give us […]miniTAREA: Comprobar que los planetas del Sistema Solar ‘cabrían’ entre la Tierra y la Lunahttp://www.mathblogging.org/post/1023022014-10-24T15:39:34-04:00Luis Miguel Iglesias AlbarránDescripción de la miniTAREA: Comprobar que la afirmación es correcta, realizando para ello las investigaciones pertinentes acerca del tamaño de los distintos planetas del Sistema Solar, teniendo en cuenta la distancia Tierra-Luna.   Fuente: Wikipedia Curioso dato: Los planetas del Sistema…Read more →Mind Blownhttp://www.mathblogging.org/post/1023002014-10-24T15:33:43-04:00samjshah[Cross Posted on the One Good Thing Teach blog] Setup: We’ve been talking about perpendicular bisectors in various contexts in geometry. But they were just making observations and working on some simple proofs. Last night in Geometry, students were tasked with the following: It turns out that #3 is impossible, and #4 is possible with some […]Harvard Junior Faculty Job Searchhttp://www.mathblogging.org/post/1022982014-10-24T14:46:00-04:00Michael MitzenmacherHarvard Computer Science is doing a junior faculty search this year. We pretty much have been doing one every year, but it's nice to be able to make an announcement and point people to the ad.<br /><br />So here is the ad, telling you what you need so send in if you're applying. <br /><br />Also as usual, we're looking in all areas, because we're always interested in great people. However, in the interest of full disclosure, the focus this year is described as<br />This is a broad faculty search and we
[…]More Tornadoes Recorded Doesn’t Mean More Tornadoes Occurringhttp://www.mathblogging.org/post/1022992014-10-24T14:39:28-04:00Jo Craven McGintyThe number of tornadoes recorded by the National Climatic Data Center has increased in recent years, but that doesn’t mean there have been more twisters.
A Conceptual Victoryhttp://www.mathblogging.org/post/1022962014-10-24T14:34:06-04:00Megan SchmidtCollege Algebra, reviewing the graphs of polynomial functions. Each student has a whiteboard. We started with y=(x+2)(x-3) for simplicity. Me: What do we know about this graph? Student(s): It has x-intercepts at -2 and 3 (or something along those lines) Me: What else do we know? Student(s): It’s a parabola (or some version of that) Me: […]The Secret of Flowchart Proofs #officesupplieshttp://www.mathblogging.org/post/1022972014-10-24T14:30:00-04:00cheesemonkeysf<br />Two words for you:<br />Tiny. Post-Its.Have you had your flu shot yet?http://www.mathblogging.org/post/1022912014-10-24T13:50:00-04:00JosephThis is Joseph<br /><br />I was reading Mike the Mad Biologist's web page and I noted this article on Ebola and the flu. Ebola has been in the news a lot but influenza remains a bigger killer than Ebola:<br />Ebola has claimed fewer than 4,000 lives globally to date, none in the United States. Flu claims between 250,000 and 500,000 lives every year, including over 20,000 in the United States—far more American lives than Ebola will ever claim.Notice just how terrible the Spanish flu was:<br />It infected 500
[…]Job Board, October 2014http://www.mathblogging.org/post/1022942014-10-24T13:44:28-04:00Nathan YauLooking for a job in data science, visualization, or statistics? There are openings on the board. Business Intelligence Analyst for …Frogs Love Fiber Optics — At Least in the Winterhttp://www.mathblogging.org/post/1022892014-10-24T13:32:28-04:00mathscinotesI was doing some installation inspections when we disturbed the following creatures in two different fiber optic enclosures. Winter is coming and everyone wants to find a nice, warm place to wait it out.Mapping class groups: the next generationhttp://www.mathblogging.org/post/1022932014-10-24T13:31:14-04:00Danny CalegariNothing stands still except in our memory. - Phillipa Pearce, Tom’s Midnight Garden In mathematics we are always putting new wine in old bottles. No mathematical object, no matter how simple or familiar, does not have some surprises in store. My … Continue reading →Talking to Your Phone, Dining Out and Slower Runs (Statshot)http://www.mathblogging.org/post/1022902014-10-24T13:29:05-04:00David GoldenbergAmerican teens don’t use smartphone voice-recognition technology much more than adults do overall, but they use it in different ways. Homemade meals make up almost 20% less of our calorie intake than they did 35 years ago. The jump in marathon participation has brought with it a sharp increase in average finishing time.
Using DBstack in MATLAB to get a stack tracehttp://www.mathblogging.org/post/1022922014-10-24T13:19:01-04:00DougWhen you have timers and callbacks in your code, it can be difficult to find out when certain errors are occuring. Use DBstack to find the debug stack trace in MATLAB. This will allow you to find out what function called your current function, and what function called... read more >>New York Times mapmakershttp://www.mathblogging.org/post/1022882014-10-24T13:15:51-04:00Nathan YauWhen news breaks, maps often accompany stories (or the maps are the story), and cartographers and graphics people have to …Tags: New York Times, WiredYet More Newshttp://www.mathblogging.org/post/1022872014-10-24T13:06:49-04:00woitCharlie Munger, the billionaire business associate of Warren Buffett, has donated $65 million to the KITP at UCSB for the construction of a residence for visitors. For more on this, see a UCSB story, a New York Times article, and … Continue reading →A call for postdoc applicationshttp://www.mathblogging.org/post/1022952014-10-24T13:00:17-04:00Adam WiermanIt’s that time again — our Center for the Mathematics of Informaion (CMI) call for postdoc applications is now up. As I wrote last year at this same time, one of the things I really enjoy about Caltech is the fact that we always have lots of amazing postdocs floating around… This year that is […]Now We're Thinkinghttp://www.mathblogging.org/post/1022852014-10-24T13:00:00-04:00Jonathan ClaydonRecently, I discussed attempts to stop explaining so much. Experiments with assessments are showing success. Skills are great, but I want to see who is thinking. Part of the reason I don't mind letting students (even PreAP, the horror!) use their notebooks on assessments is that a well done thinking question can't be anticipated. Through the course of working with the skills, the student either developed a strong working idea of the concept and therefore can answer just about anything, or they
[…]Challenge Based Learning Project – The Introduction Videohttp://www.mathblogging.org/post/1022862014-10-24T12:44:48-04:00mathmindsblogAs a continuation of my previous post on our CBL project, the students have finished their introduction video! Here is the Google Drive link: https://drive.google.com/file/d/0B9op0nRdQxB4b19FSHh5Q2x5Z1k/view?usp=sharing We have now moved into our guiding questions to focus each project and get a timeline nailed down for the solutions! They have also been filming reflection clips as we […]Open letter from the Northwestern University Philosophy Graduate Studentshttp://www.mathblogging.org/post/1022842014-10-24T12:37:56-04:00Helen De CruzThe following letter was adopted by the Northwestern University Philosophy Graduate Students by way of a vote: As many in the philosophical community already know, sexual misconduct is a prevalent problem in the discipline. Our department is currently bearing the weight of its own controversy regarding sexual misconduct, and we...Pokemon Fractalshttp://www.mathblogging.org/post/1022832014-10-24T12:25:11-04:00ioanaiulianaIf you are following my Facebook page, you probably already know my love for Fractals. The math behind these is not as easy as expected, but the result is extremely beautiful. In case you don’t know what a fractal is … Continue reading →Contare: la nuova app iPad di Schoolapp per i bambini in età prescolarehttp://www.mathblogging.org/post/1022822014-10-24T12:13:00-04:00Chris SorrentinoSe pensate che le app educative per iPad debbano parlare solo inglese, allora non conoscete Schoolapp, una nuova società made in Italy fondata da Pierluigi Cappadonia e Cristian Molon, il cui primo prodotto è stato Schoolapp Abaco, una rivisitazione videogiocata del tradizionalissimo, ma immortale, abaco. Il 10 agosto 2014, invece, Schoolapp ha reso disponibile su iTunes il download gratuito di Contare, l'app che insegna ai bambini in età prescolare a riconoscere i numeri naturali
[…]BC Open Textbook Project: Calculus (guichard), DiffEq (Trench)http://www.mathblogging.org/post/1022792014-10-24T11:36:00-04:00Albert SchuellerTwo open source textbook authors that many in this group are familiar with sent me announcements recently (see below). Looks like the folks at Simon Frasier are seeing if there is a viable business in offering print-on-demand versions of popular open source texts. They've branded the effort BCCampus.<br /><br />From David Guichard:<br /><br />The BC Open Textbook Project is offering print copies of the book (Calculus, Guichard et al) in color
[…]Heart paper will go on, but only in the first of two journals it was published inhttp://www.mathblogging.org/post/1022762014-10-24T11:30:19-04:00Cat FergusonA cardiovascular group has retracted a conference proceeding abstract, because it too closely resembled a paper they published prior to the conference. The last author is baffled as to why the journal couldn’t have made that call before they published the abstract. Here’s the notice for “Increased beta-adrenergic inotropy in ventricular myocardium from Trpm4 knockout […]Einstein equation for an exponential metrichttp://www.mathblogging.org/post/1022782014-10-24T11:26:31-04:00growescienceReference: Moore, Thomas A., A General Relativity Workbook, University Science Books (2013) – Chapter 21, Problem 21.8. Consider the metric: We’ll have a look at what the Einstein equation has to say about gravity in a spacetime using this metric. First, we’ll find the Christoffel symbols using the method of comparing the two forms of […]Spotlight on Student Assessment and Accountability: Week of October 20, 2014 updatehttp://www.mathblogging.org/post/1022772014-10-24T11:25:45-04:00UnknownWant to find out about each of these (and more)? Just click and read.Sample Schedules for Online TestingPre-identification for Spring 2015 AssessmentsRequest for Paper/Pencil AdministrationKindergarten Entry Assessment (KEA)Technology Readiness Information<br /><br />Teacher Reflection 180: Day 10http://www.mathblogging.org/post/1022742014-10-24T11:03:41-04:00banderson02Something I learned today was _____ (be specific! An answer of math is too general) _____ was similar to the lesson yesterday because _____ (write a couple of sentences explaining how they are)   Today’s reflection questions for students is all about how they perceive my lessons. It is a check to make sure […]