Notes concerning “Physics”

• Food miles imply insignificant energy costs 2007 to 2009 (4 minutes)
• The AL programming language, dimensional analysis, and typing: do different dimensions really exist? 2007 to 2009 (2 minutes)
• Pensamientos acerca de diseñar un calefón solar 2012-10-15 (2 minutes)
• Más pensamientos acerca de diseñar un calefón solar 2012-10-15 (5 minutes)
• Passively safe solar hot water 2012-10-15 (updated 2012-10-16) (6 minutes)
• Notes and calculations on building luxury underground arcologies for whoever wants them 2013-04-17 (updated 2019-08-27) (66 minutes)
• Illuminating yourself with 10 kilolux of LEDs to combat seasonal affective disorder 2013-05-17 (5 minutes)
• Cheap shit ultrawideband 2013-05-17 (10 minutes)
• Evaporation chimney 2013-05-17 (13 minutes)
• Steampunk spintronics: magnetoresistive relay logic? 2013-05-17 (15 minutes)
• Saturation detector 2013-05-17 (3 minutes)
• Time domain lightning triggering 2013-05-17 (4 minutes)
• A unicast phased-array ultrasonic “radio” 2013-05-17 (4 minutes)
• A resistive-capacitive trackpad made from garbage and three ADC microcontroller pins 2013-05-17 (updated 2013-05-20) (17 minutes)
• Ultraslow radio for resilient global communication 2013-05-17 (updated 2013-05-20) (26 minutes)
• Bottle washing 2014-04-24 (7 minutes)
• Holographic archival 2014-04-24 (10 minutes)
• Inflatable stool 2014-04-24 (6 minutes)
• Archival transparencies 2014-06-05 (updated 2014-06-29) (7 minutes)
• Slotted tape with skewed involute roulette bristles as an alternative to hose clamps and possibly screws 2014-07-02 (6 minutes)
• Keyboard-powered computers 2014-10-25 (updated 2018-10-28) (26 minutes)
• A mechano-optical vector display for animation archival 2014-12-28 (updated 2015-09-03) (28 minutes)
• Can you read the lunar lander’s plaque from Earth? Or write a new one? 2015-09-03 (9 minutes)
• Simplified computing, down to the level of mining raw materials 2015-09-03 (22 minutes)
• Tapered thread 2015-09-03 (updated 2019-06-10) (4 minutes)
• Hot wire saw 2015-12-28 (updated 2019-06-02) (10 minutes)
• Electrodeposition 3d printing 2016-02-19 (4 minutes)
• Spring energy density 2016-05-28 (updated 2016-06-06) (13 minutes)
• Phase-change heat reservoirs for household climate control 2016-06-14 (updated 2016-06-17) (13 minutes)
• Mechanical buck converter 2016-06-20 (5 minutes)
• Thermodynamic systems in housing 2016-06-28 (24 minutes)
• Flux deposition for 3-D printing in glass and metals 2016-07-03 (15 minutes)
• How would you maximize the energy density of a capacitor? 2016-07-27 (5 minutes)
• Coinductive keyboard 2016-07-30 (4 minutes)
• Calculations about desalination in Israel 2016-08-11 (3 minutes)
• Executable scholarship, or algorithmic scholarly communication 2016-08-11 (13 minutes)
• Starfield servo 2016-08-30 (updated 2018-11-07) (13 minutes)
• Regenerator gas kiln 2016-09-05 (updated 2017-04-10) (9 minutes)
• Spring energy density 2016-09-05 (updated 2019-04-20) (3 minutes)
• Digital logic with lasers, induced X-ray emission, and neutron-induced fission, for femtosecond switching times? 2016-09-06 (3 minutes)
• Subterranean glazing 2016-09-06 (25 minutes)
• Sun cutter 2016-09-06 (9 minutes)
• Low-power microcontrollers for a low-power computer 2016-09-06 (updated 2018-10-28) (18 minutes)
• House scrubber 2016-09-06 (updated 2019-11-25) (13 minutes)
• Soldering with a compound parabolic concentrator or even just an imaging lens 2016-09-07 (2 minutes)
• Mic energy harvesting 2016-09-07 (updated 2016-09-08) (5 minutes)
• License-free femtowatt UHF radio transceiver ICs under a μJ per bit 2016-09-19 (5 minutes)
• Laser ablation of zinc or pewter for printed circuit boards 2016-09-19 (4 minutes)
• Marking metal surfaces with arcs 2016-10-06 (4 minutes)
• Spark particulate sieve 2016-10-06 (updated 2016-10-11) (7 minutes)
• La vibración del hierro, ¿es de baja frecuencia o qué? 2016-10-07 (3 minutes)
• Analogies between spring–mass–dashpot systems, electrical systems, and fluidic systems 2016-10-30 (4 minutes)
• Recuperator heat storage 2016-11-01 (updated 2019-08-21) (4 minutes)
• A design sketch of an air conditioner powered by solar thermal power 2016-12-22 (updated 2017-01-04) (29 minutes)
• Passive ultrasound sonar 2016-12-28 (1 minute)
• Millikiln 2017-01-17 (updated 2017-03-02) (4 minutes)
• An electric furnace the size of a sake cup 2017-02-25 (updated 2017-03-02) (10 minutes)
• Passivhaus seasonal thermal store 2017-03-02 (updated 2017-03-07) (2 minutes)
• Passive dehumidifier 2017-03-20 (14 minutes)
• Ice pants 2017-04-04 (updated 2019-01-22) (17 minutes)
• ¿Se puede armar un colector solar de agua caliente que anda en invierno acá en Buenos Aires? 2017-04-17 (2 minutes)
• Fast sea salt evaporator 2017-06-01 (3 minutes)
• A quintuple-acting vacuum cascade to recycle heat for more efficient distillation and desalination 2017-06-21 (updated 2019-12-27) (3 minutes)
• FM chirp sonar 2017-07-04 (1 minute)
• Coolants 2017-07-04 (updated 2017-07-12) (11 minutes)
• Piezoelectric engraving 2017-07-19 (4 minutes)
• Rubber air conditioner 2017-07-19 (2 minutes)
• Energy storage in a personal water tower: pretty impractical 2017-07-19 (2 minutes)
• Hammering toolhead 2017-08-18 (6 minutes)
• Bench trash power supply 2018-04-27 (9 minutes)
• Data archival on gold leaf or Mylar with DVD-writer lasers or sparks 2018-04-27 (5 minutes)
• Exploration of using RF current sources instead of ELF voltage sources for mains power 2018-04-30 (updated 2018-07-05) (29 minutes)
• You can stuff a UHMWPE hammock in your wallet 2018-05-15 (updated 2018-10-28) (11 minutes)
• Heating my apartment with a plastic tub of hot water 2018-06-17 (3 minutes)
• Lithium battery welder 2018-06-21 (updated 2019-01-22) (2 minutes)
• Electric hammer 2018-07-02 (updated 2018-07-05) (14 minutes)
• Notes on circuitry for the Nutra seed activator 2018-08-16 (20 minutes)
• You can’t construct optical systems with arbitrary light transfers, but you can do some awesome shit 2018-09-10 (11 minutes)
• Atmospheric pressure harvesting phoenix egg 2018-11-23 (14 minutes)
• Household thermal stores 2018-12-02 (updated 2018-08-19) (27 minutes)
• Friction-cutting plastic 2019-02-25 (8 minutes)
• Ultralight tunnel personal rapid transit 2019-03-11 (15 minutes)
• Elastic metamaterials 2019-03-19 (17 minutes)
• Paper/foil relays 2019-04-02 (updated 2019-10-23) (13 minutes)
• Macroscopic capacitive DLP 2019-04-08 (1 minute)
• Caustic business card 2019-04-08 (3 minutes)
• Seeing the Apollo flags from Earth would require a telescope 27× the size of the Gran Telescopio Canarias 2019-04-10 (updated 2019-04-16) (2 minutes)
• Maximal-flexibility designs for printable building blocks 2019-04-20 (18 minutes)
• Plastic cutters 2019-04-20 (5 minutes)
• Cold plasma oxidation 2019-05-01 (updated 2019-08-21) (7 minutes)
• Measuring submicron displacements by pitch bending a slide guitar 2019-05-05 (18 minutes)
• Scrubber mask 2019-05-08 (5 minutes)
• Free space optical coding gain 2019-05-08 (updated 2019-05-09) (4 minutes)
• A phase-change soldering iron 2019-05-08 (updated 2019-05-09) (14 minutes)
• Drone cutting 2019-06-11 (12 minutes)
• Computation with strain 2019-06-13 (17 minutes)
• Foil origami robots 2019-06-13 (updated 2019-06-14) (10 minutes)
• Analemma sundial 2019-07-05 (11 minutes)
• Reducing nighttime bedroom CO₂ levels 2019-07-08 (updated 2019-07-09) (14 minutes)
• Intermittent fluid flow for heat transport 2019-07-10 (4 minutes)
• Some extensions of William Beaty’s scratch holograms 2019-07-11 (9 minutes)
• Measuring the moisture content of coffee and other things with dielectric spectroscopy 2019-07-16 (updated 2019-07-17) (28 minutes)
• Sandwich theory 2019-08-05 (updated 2019-08-29) (31 minutes)
• Printed circuits on fired-clay ceramic 2019-08-13 (11 minutes)
• Can you bitbang wireless communication between AVRs? How about AM-radio energy harvesting? 2019-08-27 (updated 2019-08-28) (37 minutes)
• Gold leaf trusses 2019-08-31 (11 minutes)
• Processing halftoning 2019-09-01 (15 minutes)
• Bokeh pointcasting 2019-09-08 (updated 2019-09-09) (16 minutes)
• Lenticular deflector 2019-09-08 (updated 2019-09-09) (9 minutes)
• Pythagorean cement pipes for your shower singing 2019-09-08 (updated 2019-09-09) (7 minutes)
• Methods of pumping ice-vest coolant silently 2019-09-28 (12 minutes)
• Bistable magnetic electromechanical display 2019-10-24 (16 minutes)
• Shaped hammer face giant pressure 2019-11-10 (21 minutes)
• Kerr snow display 2019-11-12 (3 minutes)
• Nonconductive relays 2019-11-12 (3 minutes)
• Why you can't run a diesel engine on water and diesel fuel with electrolysis 2019-11-24 (2 minutes)
• The Suburbean: a minimally-mobile dwelling machine with months of autonomy 2019-11-24 (updated 2019-12-03) (32 minutes)
• Bootstrapping rope bridges and other tensile structures with UHMWPE-bearing drones 2019-11-25 (5 minutes)
• High temperature semiconductors 2019-12-01 (2 minutes)