ENTRIES TAGGED "math"
Facebook Sociology, Microbiome Mapping, Attention Surplus Disorder, and Makematics
- What Facebook Knows (MIT Tech Review) — Analyzing the 69 billion friend connections among those 721 million people showed that the world is smaller than we thought: four intermediary friends are usually enough to introduce anyone to a random stranger. and our close friends strongly sway which information we share, but overall their impact is dwarfed by the collective influence of numerous more distant contacts—what sociologists call “weak ties.” It is our diverse collection of weak ties that most powerfully determines what information we’re exposed to.
- Human Microbiome Mapped (The Scientist) — the Human Microbiome Project sequenced DNA of bacterial samples collected from 242 healthy volunteers. 3.5 terabytes of data, all accessible through public databases. One fascinating finding: Although each body part is characterised by some signature microbial groups, no species was universally present across every volunteer. “One of the HMP’s original mandates was to define the core microbiome, or the bugs that everyone shares,” said Huttenhower. “It looks like there really aren’t any.”
- Kids Today Not Inattentive (Neuroskeptic) — There’s no evidence that children today are less attentive or more distractible than kids in the past, according to research just published by a team of Pennsylvania psychologists. (via Ed Yong)
- Teaching Makematics at ITP (Greg Borenstein) — Computer vision algorithms, machine learning techniques, and 3D topology are becoming vital prerequisites to doing daily work in creative fields from interactive art to generative graphics, data visualization, and digital fabrication. If they don’t grapple with these subjects themselves, artists are forced to wait for others to digest this new knowledge before they can work with it.
Flipping the Medical Classroom, Inclusion Haters, Information Leveling, and Ars Longa Vita Brevis
- Stanford Med School Contemplates Flipped Classroom — the real challenge isn’t sending kids home with videos to watch, it’s using tools like OceanBrowser to keep on top of what they’re doing. Few profs at universities have cared whether students learned or not.
- Inclusive Tech Companies Win The Talent War (Gina Trapani) — she speaks the truth, and gently. The original CNN story flushed out an incredible number of vitriolic commenters apparently lacking the gene for irony.
- Buyers and Sellers Guide to Web Design and Development Firms (Lance Wiggs) — great idea, particularly “how to be a good client”. There are plenty of dodgy web shops, but more projects fail because of the clients than many would like to admit.
- What Does It Mean to Say That Something Causes 16% of Cancers? (Discover Magazine) — hey, all you infographic jockeys with your aspirations to add Data Scientist to your business card: read this and realize how hard it is to make sense of a lot of numbers and then communicate that sense. Data Science isn’t about Hadoop any more than Accounting is about columns. Both try to tell a story (the original meaning of your company’s “accounts”) and what counts is the informed, disciplined, honest effort of knowing that your story is honest.
Illuminated Mario, Touchstone Facts, Calculating Spamicity, and Abstract Quantified Self
- Gravity in the Margins (Got Medieval) — illuminating illuminated manuscripts with Mario. (via BoingBoing)
- Hours Days, Who’s Counting? (Jon Udell) — What prompted me to check? My friend Mike Caulfield, who’s been teaching and writing about quantitative literacy, says it’s because in this case I did have some touchstone facts parked in my head, including the number 10 million (roughly) for barrels of oil imported daily to the US. The reason I’ve been working through a bunch of WolframAlpha exercises lately is that I know I don’t have those touchstones in other areas, and want to develop them. The idea of “touchstone facts” resonates with me.
- Spotting Fake Reviewer Groups in Consumer Reviews (PDF) — gotta love any paper that says We calculated the “spamicity” (degree of spam) of each group by assigning 1 point for each spam judgment, 0.5 point for each borderline judgment and 0 point for each non-spam judgment a group received and took the average of all 8 labelers. (via Google Research Blog)
- Visualizing Physical Activity Using Abstract Ambient Art (Quantified Self) — kinda like the iTunes visualizer but for your Fitbit Tracker.
Elective Dickery, Probabilistic Data Analysis, Data Cleaning, and SSL Security
- Punting on SxSW (Brad Feld) — I came across this old post and thought: if you can make money by being a dick, or make money by being a caring family person, why would you choose to be a dick? As far as I can tell, being a dick is optional. Brogrammers, take note. Be more like Brad Feld, who prioritises his family and acts accordingly.
- Probabilistic Structures for Data Mining — readable introduction to useful algorithms and datastructures showing their performance, reliability, and resources trade-off. (via Hacker News)
- Many HTTPS Servers are Insecure — 75% still vulnerable to the BEAST attack.
- Apollo Software — amazing collection of source code to the software behind the Apollo mission. And memos, and quick references, and operations plans, and …. Just another reminder that the software itself is generally dwarfed by its operation.
- t (Github) — command-line power-tool for Twitter.
- Habits of Mind (PDF) — Much more important than speciﬁc mathematical results are the habits
of mind used by the people who create those results,and we envision a curriculum
that elevates the methods by which mathematics is created,the techniques used
by researchers,to a status equal to that enjoyed by the results of that research. Loved it: talks about the habits and mindsets of mathematicians, rather than the set of algorithms and postulates students must be able to recall. (via Dan Meyer)
Financial Data, 21C Learning for Parents, IQ Battles, and Etsy Hacker Grants
- Big Data in Finance (PDF, 9M) — Algo trading systems have begun to resemble an arms race. Competition, data, and the race for real-time.
- A Parent’s Guide to 21st Century Learning (Edutopia, free registration required to download) — What should collaboration, creativity, communication, and critical thinking look like in a modern classroom? How can parents help educators accomplish their goals? We hope this guide helps bring more parents into the conversation about improving education. (via Derek Wenmoth)
- Chess Intelligence and Winning — survey of IQ gaps between contestants needed to win competitions. We could view cops and killers as being involved in a grim contest. In the USA around 65% of all murders are solved. That converts to an average “murder” ELO rating difference between police and murderers of 108 ELO points. It is also known that the mean IQs of murderers and policemen are 87 and 102, respectively. So successfully solving murders is a puzzle then the “a” coefficient is 0.041, and each IQ point difference is worth 7.2 ELO points. I suspect this is masturbatory math extrapolation rather than anything significant or predictive, but the cops-vs-robbers IQ contest was an interesting angle. (via Dr Data’s Blog)
- Etsy Hacker Grants: Supporting Women in Technology — Today, in conjunction with Hacker School, Etsy is announcing a new scholarship and sponsorship program for women in technology: we’ll be hosting the summer 2012 session of Hacker School in the Etsy headquarters, and we’re providing ten Etsy Hacker Grants of $5,000 each — a total of $50,000 — to women who want to join but need financial support to do so. Our goal is to bring 20 women to New York to participate, and we hope this will be the first of many steps to encourage more women into engineering at Etsy and across the industry.
Touch-Typing Instruction, HTTP Header Attacks, Sorting Ratings, and Risks of Inspecting Applicants' Facebook Pages
- Typing Club — lessons to improve your touch-typing, building you up letter by letter to speed and mastery. Like how I learned, only without the typewriters and the bibs and the roomful of girls. It wasn’t easy being the only boy in typing class, but somehow I managed. (via EdTech ideas)
- SQL Injection via HTTP Headers — excellent introduction to how some surprising HTTP headers can be attack vectors.
- How Not to Sort by Average Rating (Evan Miller) — so easy to get it wrong, so eye-wateringly complex a formula to do it right. (via Hacker News)
- I Hereby Resign (Reg Braithwaite) — not an actual resignation letter, but it highlights exactly why asking to see applicants’ Facebook pages is a bad idea. “If you are surfing my Facebook, you could reasonably be expected to discover that I am a Lesbian. Since discrimination against me on this basis is illegal in Ontario, I am just preparing myself for the possibility that you might refuse to hire me and instead hire someone who is a heterosexual but less qualified in any way. Likewise, if you do hire me, I might need to have your employment contracts disclosed to ensure you aren’t paying me less than any male and/or heterosexual colleagues with equivalent responsibilities and experience.” Ditto “spouse is pregnant so I’m about to take maternity leave just after you hire me”, etc. Those things you spend days thumping into HR that they aren’t supposed to ask about? All on the applicants’ Facebook pages.
Healthcare Ain't Silicon Valley, Math for Makers, Open Source Musician Tools, and Learn to Make Languages
- Five Tough Lessons I Had To Learn About Healthcare (Andy Oram) — I don’t normally link to things from Radar but this gels 110% with my limited experience with the healthcare industry.
- Makematics: Math for Makers — I want the hardware hackers who are building the next generation of DIY 3D printers to be able to turn topological algorithms and concepts into open source tool path generation software that creates more efficient gcode and enables the fabrication of previously impossible physical forms. I don’t know the best way to go about this, but this site is intended to act as home for my experiments.
- CASH Music — they build open source tools for musicians and labels to make money. What WordPress did for bloggers, we’re doing for musicians. (via New York Times)
Watercolor Maps, Inside Displays, Numbers API, and Chinese Mobile Activations Boom
- Stamen Watercolour Maps — I saw a preview of this a week or two ago and was in awe. It is truly the most beautiful thing I’ve seen a computer do. It’s not just a clever hack, it’s art. Genius. And they’re CC-licensed.
- Screens Up Close — gorgeous microscope pictures of screens, showing how great the iPad’s retina display is.
- Numbers API — CUTE! Visit it, even if you’re not a math head, it’s fun.
- China Now Leads the World in New iOS and Android Device Activations (Flurry) — interesting claim, but the graphs make me question their data. Why have device activations in the US plummeted in January and February even as Chinese activations grew? Is this an artifact of collection or is it real?
jQuery Performance, George Dyson, VLC 2.0, and Power Laws
- Stop Paying Your jQuery Tax (Sam Saffron) — performance advice for front-end developers. The faster your site responds, the more customers will use it.
- George Dyson Interviewed (Wired) — a different perspective on computing, worth reading.
- VLC 2.0.0 — VLC lets you bypass manufacturers’ designed-in brokenness so your computer can play media. Glad to see it still being actively developed.
- Critical Truth About Power Laws (Science Magazine) — Although power laws have been reported in areas ranging from finance and molecular biology to geophysics and the Internet, the data are typically insufficient and the mechanistic insights are almost always too limited for the identification of power-law behavior to be scientifically useful (see the figure). Indeed, even most statistically “successful” calculations of power laws offer little more than anecdotal value. (no PDF available unless you pay, because that’s how great science works)