X

Posts

April 24, 2014

+
9:13 PM | INFORMS Connect Launching in May
One of the projects that has been keeping me busy is getting INFORMS Connect, our latest member benefit, ready for launch. It is a members-only online collaboration space.
+
9:08 PM | Environmental impact of power lines
This is to simply document my observation which I've been mulling over for a long time until very recently. A couple of streets that I daily drive over are lined with trees whose branches seem to exhibit strange growth pattern. While their older branches point unremarkably each other way, the younger ones sprout pretty much verticallyEnvironmental impact of power lines is a post from: CTK Insights
+
8:52 PM | Milk Cap Magic Squares
Ready for some fun? Grab a copy of Ben Franklin and His Magic Squares to read aloud. Stop reading after it says, "Now Ben wondered if he could make the numbers [1-9, in a square] add up to 15..."Give each student a set of 9 milk caps (I don't EVER throw them away!) to number, 1-9.Challenge them to make a 3 x 3 array in which every row, column, and diagonal totals 15.If they think they've found the answer, have them scurry off to write it down! (And hide it from everyone else!)Stop periodically […]
+
8:21 PM | Great Tasks: Infinity Pizza
Connie Schrock and I recently presented a webinar on Great Tasks: What is a “great task”? How is a great task used effectively in the classroom? Published by the National Council of Supervisors of Mathematics (NCSM) with support from Texas Instruments, NCSM Great Tasks for Mathematics 6-12 provides opportunities for students to explore meaningful mathematics […]
+
7:28 PM | CSjob: Internship Livermore, CA, Student Intern - Signal Processing Grad Summer, Sandia National Lab.
Jovana Helms just sent me the following:Hi Igor, I am looking for a graduate summer intern with CS background to help on a research project at Sandia National Labs in Livermore, CA. Could you please post the position on Nuit Blanche? Please note that US citizenship is required for this position. https://ws11snlntz.sandia.gov/psp/applicant/EMPLOYEE/HRMS/c/HRS_HRAM.HRS_CE.GBL?Page=HRS_CE_JOB_DTL&Action=A&JobOpeningId=646028&SiteId=1&PostingSeq=1 Thanks,JovanaJovana […]
+
7:14 PM | buzzfeed: Finding a job sucks.
buzzfeed: Finding a job sucks.
+
6:54 PM | Fantastic math word problems
Here's a weird/funny/fantastic math problem... But it also kind of highlights the word problems we often see in math books - like some have noted, it's only in math classes that trains travel towards each other on the same track, or someone buys 61 watermelons for himself, or people paint houses at identical speeds all day long, etc. All kinds of unrealistic situations.But, being a curriculum author myself, I know it's hard to make problems that would always perfectly relate to real life. In […]
+
6:50 PM | MFM2P - Days 47 & 48
Day 47This will be a short post. We did the last example from the solving by substitution set and then students worked on the review package I put together to prepare for Monday's test. I worked with them in small groups and answered individual questions. Trig is still what they have the most trouble remembering. But they do get it once they are pointed in the right direction. Still, I think I need to do more next time around.Day 48I'm cheating and posting for tomorrow but half of my class will […]
+
6:22 PM | centralsun: stacking platonics!
centralsun: stacking platonics!
+
6:07 PM | From head injury to math genius: On savant syndrome and the possibility of a 'little Rain Man within us all'
From head injury to math genius: On savant syndrome and the possibility of a 'little Rain Man within us all': Victoria Lambert: For Jason, a father-of-one from Tacoma, in Washington State, the effect of his injury was remarkable, very rare — and strangely fortunate. From college drop-out with a dodgy hair cut — interested in little more than drinking, racing cars and going to the gym — Jason, now 43, woke up the day after he was attacked with an extraordinary ability in mathematics and […]
+
5:35 PM | Commenting on the Blog
Should be working again! Thanks for everyone's patience while we've been having problems with Typepad.
+
5:18 PM | skyndimynd frá Íslandi (#3)
Filed under: Kids, Mountains, pictures, Travel Tagged: AISTATS 2014, Arnarstapi, cliffs, Iceland, Snaefell, volcanoes
+
4:52 PM | CfP: Decisions, Groups and Networks @ LMU (8-9 Sept 2014)
In recent years, formal and empirical approaches have become central to study group decision-making. Social network analysis, agent-based modeling and simulation techniques are meanwhile widely used not only in sociology, political science, social psychology, and economics. Also philosophers increasingly point to the potentials of these approaches for addressing questions in political and moral philosophy, formal epistemology, and philosophy of science more generally. Whereas the importance of […]
+
4:50 PM | Detailed Map of Baseball Fandom
For the past couple of sports seasons, Facebook mapped the most liked team by county. They did it for football …
+
4:37 PM | Shimura-Taniyama-Weil Conjecture (Modularity Theorem)
Originally posted on Math Online Tom Circle:Shimura and Tanyama are two Japanese mathematicians first put up the conjecture in 1955, later the French mathematician André Weil re-discovered it in 1967. The British Andrew Wiles proved the conjecture and used…
+
4:36 PM | Falling into a black hole: tidal forces
Reference: Moore, Thomas A., A General Relativity Workbook, University Science Books (2013) – Chapter 19; Problem P19.9. Using the Riemann tensor, we can get an idea of the force felt by someone falling into a black hole. Recall the original definition of the Riemann tensor was in terms of the equation of geodesic deviation: where […]
+
4:12 PM | The Quick Way To Become A Physicist
So you want to become a physicist, right? Problem is you don’t know much physics. Maybe you did some in high school. You might even have read a few physics blogs. But despite your enthusiasm, the road to the research frontier looks perilously long! But I reckon it can be hiked in less than a […]
+
3:39 PM | Riemann tensor in the Schwarzschild metric: observer’s view
Reference: Moore, Thomas A., A General Relativity Workbook, University Science Books (2013) – Chapter 19; Problem P19.8. The component of a four-vector along a basis vector is given by the dot product of the four-vector with the basis vector. Since the dot product is a scalar, it can be computed in any reference frame. In […]
+
3:30 PM | Wrong cell line leads to retraction of kidney cancer study
A group of authors in China has retracted their December 2013 paper in PLoS ONE after realizing that they’d been studying the wrong cells. The paper, “Up-Regulation of pVHL along with Down-Regulation of HIF-1α by NDRG2 Expression Attenuates Proliferation and Invasion in Renal Cancer Cells,” came from Lei Gao, of the Fourth Military Medical University, […]
+
3:09 PM | Coatoms of the lattice of funcoids
Open problem Let and be infinite sets. Characterize the set of all coatoms of the lattice of funcoids from to . Particularly, is this set empty? Is a coatomic lattice? coatomistic lattice?
+
3:01 PM | Libraries Without Books
Georgia Tech in its library renovation will move the vast majority of its books into a combined Emory/Tech Library Service Center off-campus. Very few people use the stacks anymore, particularly at this institute dominated by engineering and computer science. As a young assistant professor at the University of Chicago in the 90's, I averaged about one trip a day to the joint Math/CS library to track down research papers or old books to find various mathematical definitions and […]
+
2:59 PM | MEAP or SBAC: which will it be?
The legislature continues to haggle over which assessment system Michigan will use in the 2014-15 school year.For the latest news on this topic, read the April 24, 2014 Bridge article from The Center for Michigan and then contact your legislator.
+
2:57 PM | Μι, όπως μοναξιά
Σαν σήμερα, τέσσερα χρόνια πριν, ο Ντενί Γκετζ έφυγε από τη ζωή. Με μια σύντομη και λιτή αναγγελία μετρημένων λέξεων, με ανύπαρκτα σχήματα λόγου, σαν τυπωμένη σιωπή,  ανακοινώθηκε η μεγάλη απώλεια. Έτσι τσιγκούνικα και ματζίρικα ανακοινώθηκε ο θάνατος του ανθρώπου που δεν […]
+
2:45 PM | scienceisbeauty: Great SMBC today. Anyone who has been involved...
scienceisbeauty: Great SMBC today. Anyone who has been involved ever in an Internet discussions will corroborate this graph as pretty accurate.
+
2:39 PM | Reconstructing Nonlinear Biochemical Networks
We've recently featured an implementation of CaSPIAN: A Causal Compressive Sensing Algorithm for Discovering Directed Interactions in Gene Networks but the subject has been ongoing ( see Reverse Engineering Biochemical Networks and Compressive Sensing and Sunday Morning Insight: The extreme paucity of tools for blind deconvolution of biochemical networks ). So we now have two entrants in that arena:Inferring Cell-Scale Signalling Networks via Compressive […]
+
2:18 PM | Is a Learning Goal a Performance Goal?
In "Motivational Processes Affecting Learning," Carol Dweck distinguishes between performance goals and learning goals, and ties a lot of good behaviors to the having of learning goals and the opposite to the having of performance goals. (link)A learning goal is defined as a goal "in which individuals seek to increase their competence, to understand or master something new."A performance goal is defined as a goal "in which individuals seek to gain favorable judgments of their competence or […]
+
2:18 PM | Bear With Me, I'm Trying Really Hard To Understand Dweck's Distinction Between Learning and Performance Goals
In "Motivational Processes Affecting Learning," Carol Dweck distinguishes between performance goals and learning goals, and ties a lot of good behaviors to the having of learning goals and the opposite to the having of performance goals. (link)A learning goal is defined as a goal "in which individuals seek to increase their competence, to understand or master something new."A performance goal is defined as a goal "in which individuals seek to gain favorable judgments of their competence or […]
+
2:05 PM | PourOver Allows Filtering of Large Datasets In Your Browser
The New York Times released PourOver, a library that lets you do database-like things client-side, so that (1) you, the …
+
1:47 PM | New call: Horizon 2020 - Marie Sklodowska-Curie actions - COFUND
A new call was issued under EU's programme HORIZON 2020: The COFUND scheme aims at stimulating regional, national or international programmes to foster excellence in researchers' training, mobility and career development, spreading the best practices of Marie Skłodowska-Curie actions. This will be achieved by co-funding new or existing regional, national, and international programmes to open up to, and provide for, international, intersectoral and interdisciplinary research training, as well […]
+
1:30 PM | “With deep regrets we apologize:” Economics paper retracted for plagiarism
An economics paper has been retracted after the journal that published it became aware that it contained plagiarism. Here’s the notice: With deep regrets we apologize to Dagoberto Páramo Morales for inadvertently publishing the article (in Economics and Management, No.4, 2012) of Inese Spīča and Ernests Spīčs, titled EFFECTIVITY OF ETHNOMARKETING IN E-ENVIRONMENT, which contains […]
123456789
52,067 Results