Human folly for 02017-05-19

older newer index

• Chapter 10 Houyhnhnms vs Martians (ngnghm.github.io):

  #Faré’s review of #Urbit

• Book review the hungry brain (slatestarcodex.com):

  brief (7100 word) review of Guyenet’s book on #nutrition science and #obesity #medicine

• Squeam (github.com):

  Darius’s new dialect of #Lisp, kind of based on #Scheme but more based on pattern-matching and E. Depends on Chez Scheme.

• 18899 RT soldering pen (hackaday.io):

  #soldering iron with temperature control in an OLED screen on the handle, using Weller thermocouple-feedback tips. #hardware

• 25 pubsub (ipfs.io):

  #IPFS is adding #pubsub for #decentralization

• Request (github.com):

  "Request" is the standard way to make HTTP requests in #node nowadays

• Jimp (npmjs.com):

  an #image-processing library in pure JS for #node

• JPEG JS (npmjs.com):

  a pure-JS #JPEG library for #node

• Tutorial (facebook.github.io):

  The standard #React #tutorial

• (mastodon.social):

  the #history of how Chromium was born

• Hodlr (github.com):

  a dense linear #solver. “Low-rank approximation of the appropriate blocks are obtained using partial pivoted LU algorithm. The domain is sub-divided based on a KDTree. The solver is fairly general and works with minimal restrictions.”

• (arxiv.org):

  #paper on #algorithms for #compressed-indexing in deterministic linear time. “We show that the compressed suffix array and the compressed suffix tree of a string T can be built in O(n) deterministic time using O(nlogσ) bits of space, where n is the string length and σ is the alphabet size.”

• Duos development (forum.xda-developers.com):

  alternative ROMs for the Galaxy Y Duos S6102 #cellphone

• F9Tfo5 (ibb.co):

  photo of a pottery bowl I burnished with a chunk of quartzite

• Examining reproducibility (cs.brown.edu):

  Shriram Krishnamurthi examines Collberg and Proebsting’s #reproducibility research and is not able to reproduce it

• SQL copy (postgresql.org):

  #Postgres SQL extension “COPY” for faster #ETL

• (journals.sagepub.com):

  cc-by #paper on #finite-element analysis with #interval-arithmetic (I think; #toread)

• Citation (dl.acm.org):

  “Improving interval analysis in #finite-element calculations by means of #affine-arithmetic” #paper #interval-arithmetic #toread

• Download (citeseerx.ist.psu.edu):

  #pdf #paper “Ray Casting Implicit Fractal Surfaces with Reduced #Affine-Arithmetic” #graphics #ray-tracing #interval-arithmetic #toread This looks fricking awesome. From 2010.

• Abstract (onlinelibrary.wiley.com):

  #paper “Fast #Ray-Tracing of Arbitrary Implicit Surfaces with Interval and #Affine-Arithmetic” #interval-arithmetic #graphics #toread with reduced affine arithmetic and #GPGPU goodness from 2008.

• (pdfs.semanticscholar.org):

  preprint #PDF of reduced #affine-arithmetic #ray-tracing #paper with #GPGPU stuff from 2008

• Interval (mat.univie.ac.at):

  overview of the #interval-arithmetic field up to 2004 or so

• Rec2016 FP 07 alba%20sofi%20and%20eugenia%20romeo a%20new%20interval%20finite%20element%20method%20computational%20issues (rec2016.sd.rub.de):

  #pdf #paper on #interval-arithmetic and #finite-element analysis #toread from 2016

• Icpersons (cs.utep.edu):

  list of #interval-arithmetic researchers

• (pdfs.semanticscholar.org):

  #pdf #paper #toread “Sampling Procedural Shaders Using #Affine-Arithmetic” #interval-arithmetic #graphics “an average value of the shader together with accurate error bounds over a finite area” from 1998!!

• S0045794909002764 (sciencedirect.com):

  #paper #toread “Improving interval analysis in #finite-element calculations by means of #affine-arithmetic” #interval-arithmetic from 2010, on “structural safety engineering” simulations

• Item (news.ycombinator.com):

  “building r/place in a weekend”

• Arduino low power how to run ATMega328P for a year on coin cell battery (home-automation-community.com):

  reducing #Arduino power use to be able to last a year on a coin cell: use a Pro Mini, disconnect the power LED, bypass the regulator, and spend most of the time in power-down sleep mode with the brownout detector off, using Rocketscream’s LowPower library. #AVR #hardware

• Google has started a new video series teaching (reddit.com):

  #introduction series of videos on #machine-learning, discussion thread

• Bulgaria got a law requiring open source for all (reddit.com):

  #Bulgaria #politics #free-software “whatever custom software the government procures will be visible and accessible to everyone.”

• Stochastic program optimization (blog.acolyer.org):

  in “Stochastic program optimization”, “Schkufza et al. also use a search strategy to generate code that meets a given specification” #toread

• Item (news.ycombinator.com):

  hackers arguing about #Prolog

• Prolog (metalevel.at):

  a 2005 #ebook on #Prolog

• Kilo (viewsourcecode.org):

  an #ebook explaining a C implementation of a text #editor in 1000 lines of C by antirez. #literate-programming #toread

• Item (news.ycombinator.com):

  Discussion thread on #decentralization of #social-networks

• An off grid social network (staltz.com):

  an article about Scuttlebutt and other #decentralization of #social-networks #toread

• Wiki (trac.sacrideo.us):

  The wiki for the #Scheme working group, with R7RS and all previous versions of the Scheme standard

• AIM (dspace.mit.edu):

  scanned #PDF of the original 1975 AI Lab memo defining #Scheme, “Scheme: An interpreter for extended lambda calculus”

• An907A (homepage.divms.uiowa.edu):

  Microchip #appnote #PDF on driving stepper #motors, especially with a #PIC. #hardware

• Stepper ST (users.ece.utexas.edu):

  #appnote #PDF on driving stepper #motors from ST (SGS-Thomson). #hardware

• Doc8017 (atmel.com):

  Atmel #appnote #PDF on driving stepper #motors with an #AVR

• An2974 (nxp.com):

  #Introduction #appnote #PDF on driving stepper #motors from NXP/Philips #hardware

• En (st.com):

  Another ST #appnote #PDF on driving stepper #motors. #hardware

• Item (news.ycombinator.com):

  advice on becoming a better programmer

• Item (news.ycombinator.com):

  how to learn math #education

• (internals.rust-lang.org):

  #Rust region inference evolution in 2015

• On punching Nazis (popehat.com):

  freedom of speech, Nazis, #human-rights, and #USA #politics. “The humanity that will be deciding whom to punch and whom to prosecute is the same humanity that produced the Nazis in the first place, and has a well-established record of making really terrible decisions.”

• Item (news.ycombinator.com):

  Immutable caching, subresource integrity, #content-addressable JS, and whatnot

• Half Baked idea content addressable web proxy (rwmj.wordpress.com):

  a #content-addressable web proxy

• Big data Cambridge Analytica Brexit Trump (motherboard.vice.com):

  Did #Trump win because of Cambridge Analytica and microtargeting? #politics #USA #history

• Secret docs reveal president Trump has inherited an FBI with vast hidden powers (theintercept.com):

  #FBI, #USA #politics, and #Trump

• BayesDB (probcomp.csail.mit.edu):

  BayesDB, a #probabilistic-programming #database

• The algorithms behind probabilistic programming (blog.fastforwardlabs.com):

  #probabilistic-programming #toread

• Andrew Sullivan president Trump and the end of the Republic (nymag.com):

  #Trump #USA #politics #history

• President Stephen bannons amazing first week in office Trump EO nsc immigration (foreignpolicy.com):

  #Trump is not in favor with the CFR, who consider Bannon to be the “puppet master”. #USA #politics

• In Venezuela we couldnt stop Chavez Dont make the same mistakes we did (washingtonpost.com):

  #Trump in the #USA is like Hugo #Chávez Frias in #Venezuela. #politics #history

• E6Cb0E12 3c26 11e7 a59b 26e0451a96fd story (washingtonpost.com):

  #Trump investigation over Comey firing has surprise resignation: House Oversight Committee chairman resigns, not from the committee, but from Congress. #USA #politics

• (arxiv.org):

  #PDF of “Adversarial Variational Bayes: Unifying Variational Autoencoders and Generative Adversarial Networks” maybe the best #paper on #GANs

• UN juez avalo El topless en Necochea y se expreso a favor del tetazo con UN escrito en primera persona (infobae.com):

  In February there was a controversy in #Argentina about some women who were arrested for going topless on a beach in Necochea. The judge dismissed the case. #politics #feminism

• Trump approved Yemen raid five days after inauguration (theguardian.com):

  #Trump attack on #Yemen in February. #politics

• Lo dijo la justicia Las tetas no son delito (cosecharoja.org):

  #Argentina #feminism #politics: “Boobs are not a crime”, by the judge who dismissed the topless Necochea case

• H bridge drivers (modularcircuits.com):

  on designing #H-bridge #hardware to drive #motors #toread

• H bridges the basics (modularcircuits.tantosonline.com):

  #Introduction to #H-bridge #hardware for driving #motors #toread

• Sign magnitude drive (modularcircuits.tantosonline.com):

  More on #H-bridge #hardware for driving #motors #toread

• Lock anti phase drive (modularcircuits.tantosonline.com):

  Still more on #H-bridge #hardware for driving #motors #toread

• Asynchronous sign magnitude drive (modularcircuits.tantosonline.com):

  Yet more on #H-bridge #hardware for driving #motors #toread

• Build an H bridge motor driver with 4 n channel MOSFET (electronics.stackexchange.com):

  advice on #H-bridge #hardware for driving #motors with N-channel MOSFETs

• Nelder%E2%80%93Mead method (en.wikipedia.org):

  one of various derivative-free #metaheuristics for #optimization, shrinking and flipping a simplex (an N-dimensional tetrahedron) toward the local minimum, aka "downhill simplex"

• Compile time lookup tables (deathandthepenguinblog.wordpress.com):

  Compile-time lookup tables in #C++ with template metaprogramming with C++14 generalized constexpr, using GCC extensions

• Comb filters (deathandthepenguinblog.wordpress.com):

  using #DSP #comb-filters to remove 50Hz mains hum and all its harmonics, with and without removing DC, optimizing the filter coefficients using #downhill-simplex #optimization

• 100 %ce%bcf capacitors (deathandthepenguinblog.wordpress.com):

  significant nonlinearity in ceramic capacitor #hardware

• Exceptions in destructors (deathandthepenguinblog.wordpress.com):

  using #SQLite nicely in #C++ with sqlite_modern_cpp, executing queries and throwing exceptions in the destructors of temporaries (!!)

• Arduino without the Arduino a minute guide (deathandthepenguinblog.wordpress.com):

  loading code onto an #Arduino without using its IDE, using avrdude -c arduino, avr-gcc, and avr-objcopy

• Louder louder louder or more dead bugging (deathandthepenguinblog.wordpress.com):

  dude got 65dBa out of #piezoelectric sounder #hardware with 1.5Vpp, so he dead-bugged and hot-glue-potted a PAM8904 driver

• Reverse engineering TL431 most common (righto.com):

  How the #TL431 programmable precision reference/shunt voltage reference/variable zener works, with a schematic. #hardware #electronics

• Building an H bridge from a salvaged uninterruptible power supply (medium.com):

  building #H-bridge #hardware from the relays from a couple of salvaged UPSes. Don’t use Darlingtons!

• Is this a good design for MOSFET H bridge (electronics.stackexchange.com):

  more on #H-bridge #hardware design, this time using MOSFETs

• The desperate battle to destroy ISIS (newyorker.com):

  #Iraq #Daesh #politics

• (sheffield-pottery.com):

  technical data on insulating firebrick #refractory #materials that I can’t be bothered to summarize here because it’s all in Imperial units

• Insulatingfirebrick (ceramaterials.com):

  technical data on insulating firebrick #refractory #materials has bricks that are good up to 1260° to 1649°, specific gravity from 0.58 to 1.03, modulus of rupture from 0.85 to 1.52 MPa, crush strength from 1.8 to 2.5 MPa, thermal conductivity from 0.18 to 0.44 W/mK, varying significantly with temperature. Less dense bricks are less conductive, weaker, and, surprisingly, resist lower temperatures — the last presumably because of a higher silica-to-alumina ratio.

• S218707641400027X (sciencedirect.com):

  review #paper on silica-alumina #refractory ceramic #materials, including particularly mullite

• Raytrace1 breakdown (mrl.nyu.edu):

  Ken Perlin presents a live-editable explanation of #ray-tracing, using #WebGL GLSL. #explorable-explanations #graphics #rendering

• Viewcontent (preserve.lehigh.edu):

  #PDF #dissertation #ebook, “Thermal Analysis of a Solar Cavity Receiver”, by Yuvraj Singh. Mostly about molten-salt solar thermal #energy plants. #thermodynamics

• Davies evol anti rest mmbr10 (fire.biol.wwu.edu):

  #PDF of “Origins and Evolution of Antibiotic Resistance” #medicine #paper #public-health

• Mm4829A1 (cdc.gov):

  #public-health #history during the 20th century

• Violent versus nonviolent revolutions which way wins (psychologytoday.com):

  why boycotts outperform bombs. #politics #nonviolence #history

• You no longer have to register your drone (venturebeat.com):

  #USA FAA can’t require registration of #drones. #politics

• CircuitJS (falstad.com):

  #hardware audio #oscillator #simulation short url: https://is.gd/vcoaudio

• CircuitJS (falstad.com):

  RF version of #hardware #oscillator #simulation, running at 100 to 212 MHz, with parasitic Ccb capacitances included