Mercurial > thoughts
view org/ideas.org @ 76:e5b15fbbd44f
merge lol.
author | Robert McIntyre <rlm@mit.edu> |
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date | Sat, 30 Nov 2013 18:36:16 -0500 |
parents | 18cec87dbd9c |
children | 8e9e811d3f76 |
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1 #+title: Big List O' Ideas2 #+author: Robert McIntyre3 #+email: rlm@mit.edu4 #+description: list of ideas from the last ~ 7 years5 #+keywords: aurellem ideas half-baked random6 #+SETUPFILE: ../../aurellem/org/setup.org7 #+INCLUDE: ../../aurellem/org/level-0.org8 #+babel: :mkdirp yes :noweb yes :exports both10 * Ideas12 This is a list of all the ideas I've had that I felt like writing down13 for the past ~ 7 years. Some of them could be practical inventions and14 are "just" waiting the that 95% perspiration to bring them to15 fruition, some are ideas for science fiction, and some are simple16 observations. Some are really only for my own personal notes and are17 not meant to be comprehensible. They are arranged roughly in reverse18 chronological order, with the most recent ideas at the top of the19 list. The ones at the bottom of the list are heavily influenced by my20 time at MIT.22 If you find some of these interesting and would like to collaborate on23 them with me or discuss them in more detail, I'd love to hear from24 you. You can email me at ideas@aurellem.org.26 If you want to use one of these ideas as your own and run with it,27 please feel free. I'd love to hear about it if you do.29 #+begin_quote30 There's no end to what a man can accomplish if he doesn't care about31 getting credit.32 #+end_quote34 - candy screw :: edible candy screw with candy nuts that you can screw35 as well.37 - better bibliography :: when writing a thesis or paper, have the38 biblography not just be an opaque list of resources, but have it39 be a list of /summaries/ and /qualities/ that each paper has in40 the context of the paper being written. When examaning a41 biblography, I want to know if reading the papers in the42 bibliography are worth my time, and I also am probably also43 interested in exactly the things that are being discussed in the44 paper I'm reading. The bibliography is the perfect place to45 provide information about the referenced papers from the46 author's perspective. I will use this biblographic form in my own47 thesis.49 - digital inter-library loan :: libraries at universities already do50 interlibrary loans for books, so why not do the same for access51 to stupid paywalled digital papers? All the universities could52 allow access to articles for registered students to all the files53 available through any participating university. This could be54 achieved by sending requests through proxies at participating55 universities. Each university would decide who at the university56 can access the proxy network. Access to the proxy network could57 be made easy using something like http://libx.org/.59 - chess visual :: to show the vast size of the game trees considered60 by computers, show two people playing chess in a61 void. They are floating in space, and there is a62 simple chess board between them. Then, as they play,63 the game tree's they are considering are drawn64 behind him. The root of the tree starts centered in65 their heads or whatever they use to think, and the66 tree grows out from behind, never crossing the67 dividing plane between the two players. Each68 player's tree is a different color. As they grow,69 there are animations for pruning, etc. Eventually,70 they look like the hemispheres of a brain, wings,71 etc. A human's tree might occasionally have a long72 chain, while the computer tree would be more73 uniform. You could compare deep blue and a modern74 laptop. Use actual data when fighting two computers!76 - time verification :: some standard way to verify that some piece of77 data was recorded at a specific time. Might involve a time78 server, a key for each time period, something like that.80 - tamper proof gold bars :: [[http://www.tungsten-alloy.com/gold-plated-tungsten-alloy-bar.html][this site]] offers gold plated tungsten bars81 as "novelty" items. One reason to prefer coins is because they82 are much harder to counterfeit because there is less surface area83 to mass ratio. However, gold bars are still a great design84 because they can hold a lot of value in a small space. A gold bar85 could be given the same protections (and more) that gold coins86 have to offer by changing it into a "gold book", which would have87 hundreds of "pages" of gold bound together. This could be88 implemented with multiple steel rods going through the book which89 can be removed, or some more classier mechanism for holding the90 pages. The point is that the bar can be EASILY subdivided (and91 people would perform this test before buying), thus guaranteeing92 it's authenticity.94 - aurellem shirt :: I should make an aurellem star symbol tee-shirt.96 - high school science :: this is a lesson in scientific ethics. The97 goal is to calculate /g/, the local gravitational98 acceleration. The students are told that the textbook says it's99 /exactly/ 9.81 before they start the experiment. See how they100 doctor their results to get closer to the textbook value. It's101 neat because for any given school, /g/ is probably *not* exactly102 equal to 9.81, because that is just an average!104 - opencourseware subtitles :: there are ladies who type up lectures105 while they are being given. These recordings should be kept and106 given to OCW for subtitles. If the timestamps of keys are107 recorded, then it is easy to make subtitles.109 - screen locking timing :: you use your computer camera to see if you110 are sitting in front of the computer. If you are, then the screen111 will never lock. If you are, then the screen will lock with a112 30-40 second timeout. It's an extension of using inactivity to113 initiate the countdown, just with more information.115 - mirror toilet :: a toilet with a square basin made or mirror instead116 or porcelain. That way, you can see how good of a117 wipe job you have done / watch how your excretion118 system works.120 - test dummies :: why don't we clone encephalic humans and use then to121 test /in vivo/ human organ systems and drugs? It122 would be ethical as long as there are women who are123 willing to host the clones, and it would be a124 tremendous resource for studying the human body. I125 see nothing wrong with it morally, since no one is126 suffering, and it stands to save many lives throughout127 more advanced technology.129 - X-ray telepresence :: given that a doctor is operating on a patient130 via telepresence, one cool things you can do is shine X-rays into131 the patient to view the insides during real time. If the system132 was coupled with a Baysean model of the layout of the structure,133 and the x-rays were only fired whenever the uncertainty of the134 model reached a certain threshold, then the radiation damage135 and surgery risk could be minimized.137 - superfluid vascular system :: I wonder what would happen if you138 replaced the blood in a human with a superfluid. What would the139 physical dynamics be? Would the superfluid flow through the140 vasculature, or would it ignore it and travel through the cells,141 or something else entirely. Since superfluids need to be cold to142 retain their superfluidity, how would the dynamics change during143 perfusion of a superfluid, where the fluid gains and looses144 superfluidity as it goes deeper into the body and is cooled by145 superfluid from upstream. In summary there are two things to146 simulate 1.) replace all blood in human with superfluid147 instantly. 2.) perfuse superfluid into human.149 - projective guessing :: I think that we read and see things by150 making a really good guess about what we're expecting to see,151 and then searching for our guess in what we see. If it really152 doesn't match, then we start to make more guesses / analyze the153 image from first principles, but most stuff is projective154 guessing.156 - Intestinal flora maintenance :: why not inoculate babies at birth157 with "ideal" gut flora instead of whatever bullshit they158 naturally get, thus giving them optimal digestive/nutrient159 extraction capabilities. Might also be able to make their farts160 not stink for life, too.162 - server culture : mirrors :: make a distributed system where people163 can mirror the websites of people they like -- essentially cover164 the server costs of favored websites. This could make popular165 websites run at no cost. The system would require that the166 mirrored content be the same as the official source. Sort of like167 bit-torrent for websites.169 - map programming :: one problem with functional programming is that170 in order to remain functional, you have to pass up arguments up171 into each calling function to get the full range of behavior172 from the lower level functions. Normally people come to a173 compromise involving abstraction and sparing use of dynamic174 variables to configure runtime behavior. What would be the175 advantages of making a programming language where every function176 receives one argument, a map, which contains all the symbol177 bindings it would ever need? This map is passed on to all178 subordinate functions. This way, you could replace functions on179 the fly, and arrange for there to be sensible defaults,180 etc. Might cause more harm than good but is an interesting idea.182 - rest nest :: a small EEG device you would attach to your head when183 you go to sleep at night. ML algorithms would determine184 your particular sleep cycles. This would mostly be an185 alarm clock that you could give a time range, say186 7:00AM - 7:15AM, and it would wake you up during an187 ideal time corresponding to then end of one of your 90188 min sleep cycles. You would feel much more rested upon189 waking up, and would wake up faster. There might be190 some other uses for the EEG data as well.192 - image compression :: use a library like gimp or opencv to process an193 image to make it have less entropy, then store the reverse of194 those operations along with the compressed simpler image as a195 super-compressed image file (possibly sccapting some196 lesses). Trades file size for decompression time, and allows one197 to cheat by using information in gimp/opencv to compress the198 image.200 - fixed cryopreservation :: why not use a fixative to buy enough time201 to ramp up cryoprotectants to an acceptable level at room202 temperature? Then, the whole system can be rapidly cooled and203 vitrified. This method "severs the biological link" in that the204 fixatives are highly toxic, but current vitrification procedures205 do this anyway since there can be a lot of freezing damage.207 - dilated security camera :: a security camera that would capture208 full video footage of everything at 60fps but then decide to keep209 only every 1 frame every 5 seconds unless there's something210 "interesting" happening.212 - bitcoin wallet :: Part of "server culture", this would be something213 like "coin.your-domain.com" which would serve as214 your personal trusted access to your own bitcoins215 from anywhere.217 - libpay :: this would be a free library which would enable218 micro-donations to software projects and other projects,219 so that you could donate a penny to "emacs" and it would220 be automatically split up to every person who has ever221 contributed to emacs in proportion to the amount of222 community esteem, code quantity, bugs fixed, whatever the223 community decides. This might make it possible for224 programmers to live entirely off of free programming.226 - distributed graphics :: Browser based graphics-card accelerated227 distributed computing API.229 - pronouns :: use capital letters A-Z instead of pronouns. They solve230 pronoun referents and gender neutrality, are short to231 say, and you can encode useful information into the232 choice of letter. For example, instead of "Meetings233 shall be presided over by the president, unless she is234 absent." USE "Meetings shall be presided over by the235 president, unless P is absent." We already use this a236 little, since I and U are reserved for the subject and237 object respectively.239 - phone DSP :: software app that inserts an audio DSP between the240 input to a phone and the output. The DSP is delicious241 and configurable, and can allow men to make their242 voices deeper, etc. The app would allow you to hear243 your own voice as others hear it. Most people hate how244 their own voice sounds. The app would also allow one to245 immediately change the parameters of the DSP using good246 presets.248 - predestined body learning :: a good example of predestined learning249 might be the mirror neurons.251 - restaurant receipt :: use a carbon copy receipt instead of two stupid252 copies.254 - anti google glass :: glasses with mounted lasers and computer vision255 that targets the cameras in google glass and destroy them.257 - wearable towel :: towel with clasp, velcro, whatever, that allows258 one to wear the towel more securely than just259 wrapping it tightly and hoping for the best.261 - crossdressing :: Easiest way to disguise oneself as a woman is to262 wear a burka.264 - book-mode :: intelligent color highlighting for books and265 articles. It would disambiguate pronouns and involved266 references. For example, if "Rachael" as red, and "the267 blonde haired girl" refers to "Rachael", then "the268 blonde haired girl" would he colored red. Also, you269 could disambiguate multi part run-on sentences by270 highlighting each subcomponent. Maybe would also have271 applications to scientific reading.273 - Handheld light Rain measurement :: this would be a clear, teflon274 coated plastic disk with a camera underneath the disk. You would275 be able to hold the device out and it would measure the rate of276 accumulation of water droplets from fine mists and light rain by277 using computer vision to measure the diameters of the drops.279 - Big Brother Farming :: This would be a vision system that would280 individually monitor each plant and turn on water, etc to ensure281 maximum/uniform growth for each plant.283 - Discrete Faucet :: A faucet with discrete ticks instead of284 continuous.286 - Laser Circle :: take a glass microfiliment and shine a laser at one287 end at an oblique angle. It will make a perfect,288 large circle on the wall, converting a laser beam289 into a laser cone, preserving most of the energy of290 the laser.292 - Invisible Glass :: Take a container of liquid and embed a293 glass sculpture made out of glass that has exactly the same index294 of refraction and color of the liquid. Then the sculpture will be295 totally invisible in the container, and will only be revealed296 when the liquid is drained. The container might be a fancy297 wine/spirit bottle or an hourglass.299 - Caterpillar people :: A race of caterpillar like creatures gains300 intelligence after eons of predation by birds, etc. These301 caterpillar creatures still undergo metamorphosis into a large302 butterfly-like creature. The metamorphosis process turns the303 caterpillar's brain into mush and reforms it into a minimal,304 dumb, truly insect-like mind, completely destroying the person305 the caterpillar was. The society develops all sorts of customs and306 religious interpretations of the metamorphosis. It is viewed as307 good and natural by some since it is part of their life cycle and308 necessary to propagate the species, as only the butterflies can309 mate. Some think that the butterflies are still the same person310 because they have the same soul, even they no longer posses the311 memories or personality of the original caterpillar. Some see the312 butterfly form as the "true form" of the species, since the313 butterflies can fly, mate, and are beautiful. Many make a big314 deal out of the fact that 1-2% of the caterpillar's mind is315 actually preserved in the butterfly. Some see it as a terrible316 tragedy and argue that the caterpillars should try to stop the317 metamorphosis by technology. Practically, some very important318 members of society undergo hormone therapy and/or surgery to319 prevent metamorphosis so that they can live longer as themselves.321 This is a continuation of Marvin Minsky's ideas about pain being322 something that preserves our bodies while destroying our minds,323 something that is a remnant from our too harsh animal days that324 hasn't caught up to the fact that we have very complex brains325 now. It's a worst-case scenario about a maladaptive genetic326 legacy. Also, it's inspired by "There She Is!!!", which makes a327 compelling point about homosexuality by introducing a second328 gender characteristic (bunny/cat, male/female), which makes329 homophobia look very silly. Here, our own biological legacy of330 pain and death is made to look like the tragedy it is through the331 lens of the the caterpillar people.333 - relationships as a business :: [[http://thedailywtf.com/Articles/Up-or-Out-Solving-the-IT-Turnover-Crisis.aspx][Turnover-Crisis]] is an excellent talk334 about the "culture of quitting," which is about better business335 by letting people go instead of keeping them around past their336 "apex". Focuses on information transfer. Cool idea of an alumni337 network, which for relationships would be a group of satisfied338 ex-lovers, who would recommend new people your way, and who might339 consider coming to you again, refreshed from their time away with340 new stories/experiences. I should look for examples of this and341 how they worked out.343 - coffee with tea :: /rlm-tea/ contains 2% sugar, 10% cream, and 20%344 dylan coffee. /dylan coffee/ contains 5% sugar,345 20% cream, and 10% rlm-tea. Start your mornings346 with recursion!348 - psychic crystal :: in a science fiction story, this would be an349 object that is very easy to move physically but is extremely350 difficult to move with telekinesis.352 - http://betsofbitco.in/ :: what a great place for an AI/person to353 prove themselves as a good predictor. I wish this could be354 automated.356 - true reflection :: don't forget about that mirror in the student357 center!, it's two mirrors at right angles, like staring at a358 corner of a room. The light reflects so that it shows you what359 you actually look like, instead of your mirror image.361 - remote control wasp :: use computer to drive wings with remote362 power/logic.364 - encrypted email phone book :: public (distributed?) database of365 email->private-key pairs, to enable automatic encryption.367 - universal eye color :: every equivalent creature will see each368 others' eyes as black -- it's universal. Even if the creatures369 see in radio waves, and their eyes are 2m long pieces of jagged370 metal, when those creatures look at each other, they will see371 black, the absence of light and color (since it's being absorbed372 by the sensor array).374 - intelligent microwave :: it learns where the hot nodes of its fields375 are, and uses them to evenly heat any food item. It has an infared376 camera or something to keep track of how hot the food is. That way,377 you don't get bowls where the edges are boiling, while the center is378 still frozen. Requires a little bit of intelligence/vision, since379 the exact pattern of heating totally depends on the exact shape of380 the food. Wouldn't need a carousel, and wouldn't need a timer,381 just a desired temperature. Could also detect ice, and automatically382 defrost the parts which are frozen. Might be able to work much383 faster since it can avoid overheating; might have problems with384 heating the insides of thick things, might need a weight sensor too.386 + Would be much cleaner than other microwaves, since food would387 "sputter" and splash liquid much less.389 + Throw in some SIFT+R processing to match previously cooked foods390 and learn the exact heating profiles for things that have been391 cooked before -- it can get faster the more it's used.393 - compression :: brain-aware image compression algorithm395 - Credit card proxy :: would be a company which works like paypal396 except for real world transactions398 - Flesh pillow :: a pillow like the arm or torso of a human, complete399 with simulated temperature, bones, and heartbeat.401 - super screw :: a screw which has only one or two threads and instead402 uses compression to fit into a hole (the whole shank403 of the screw is split into multiple pieces to404 accomplish this; the tip is a point, then the middle405 bulges out and gets compressed when screwed in.407 - light filter :: (like light tweezers) to mechanically separate408 fluids with different index of refraction410 - chalk eraser project :: maybe make a directional eraser, for easy411 release of chalk dust, like fur, and how it likes to rest in a412 certain direction.414 - silver socks :: socks laced with silver for the antimicrobial415 properties.417 - UROP :: magnet gear/metal teeth tape419 - rod of moses :: device to distill urine through evaporation and420 easily dispose of urea crystals for use in desert --421 produce drinkable water.423 - UROP :: Make the LED in line with the flow for the micro injector, so424 that it may transmit maximum flow. Motor that changes425 distance of internal magnet from windings depending on426 desired speed so as to obtain maximum power efficiency.428 - lottery scraper :: web scraper which monitors various lotteries,429 looking for "special" gimmick changes in the rules (like 4x430 winnings on Wednesdays) and computes expected value...432 - Memristiors novel design :: make an evolutionary algorithm to make433 old stuff using all four basic circuit elements.435 - Conductive concrete :: concrete that has embedded metal fibers so436 that it can conduct electricity.438 - little bitty melting pot :: might be useful for some types of439 manufacturing/3D printing -- how small can an induction melter be440 made, for example.442 - power strip/timer programmable combination :: meh444 - algorithms :: which learn what their inputs are and in what order,445 and can adapt to changing circumstances -- they446 remember previous arguments and adapt so as to respond447 to different connections.449 - true pure tones :: hear a true pure tone by direct stimulation of the450 nerves of the ear452 - mechanical analogue to the electrical op-amp :: would be an object453 with two levers -- you pull on one lever and the other moves the454 same way, no matter what's in the way or what it is driving. This455 analogy could be useful to teach op amps to people.457 - paper folding device :: make it convenient to fold lots of papers in458 various ways.460 - concrete epoxy :: epoxy with sand/ some other solid material.462 - light capacitor :: suspend some ball of material with a high index463 of refraction and shine light into it so it gets stuck -- would464 the light stay trapped forever? Could you build up unlimited465 quantities of light inside the sphere (which could then be466 released slowly by frustrated internal reflection?468 - movie screening :: Movies always are too long at first. One way to469 shorten them ``scientifically" is to record blink rate during the470 move and then remove / shorten the frames of the parts in which471 there are a lot of blinking (average this over multiple people)472 better yet, put it online and do it across thousands of people. I473 got this from youtube in which there is an episode of kill bill474 which is composed entirely of the parts in which people had their475 eyes closed. slogan: want to make a movie people can't take their476 eyes off of? Just take those parts out!478 - optimize an article :: capture reading of a scientific article via479 screen capture while people read it, then use it to make the480 article better. like the movie-pruning idea.482 - super reading program :: teaches people the ideal mental mask to483 apply during reading so as to read very fast.485 - explosive thermite epoxy putty :: one part would contain the rust,486 one part the aluminum.488 - reading comprehension :: use the above screen capture routine to489 make a quiz program that constructs questions about the content490 you seemed to gloss over while reading. could be easy if the pdf491 came with embedded questions. Dylan: automatically generate492 word-cloud about the parts you found most interesting; help493 others who read the same stuff by drawing attention to the494 interesting parts.496 - hard sword :: make a samurai sword, but use osmiridum instead of497 martensite for the cutting part; it should be a better498 sword.500 - close range wireless :: use the induction technology used to501 recharge electric toothbrushes with no metal links to send data502 without any metal at all!504 - reading :: is a form of synsethesia506 - DNA printer :: A machine which translates the text eg, "ACTGAC" into507 actual DNA509 - black generator :: ferro-fluid magnetic field suspended micro510 generator to make electricity512 - alcohol battery :: alcohol/fluid flow powered battery514 - folding razor blade sword ::516 - perfect pitch :: learn perfect pitch using another sense in517 combination (sight or touch)519 - kaleidoscope projector ::521 - razor blade de-sharpener :: for guilt free disposal523 - bricks :: filled with luminescent plant material525 - bio metallic structure :: metal grids with seeds inside, which grow526 together and form a durable biological matrix. The metal527 substrate delivers water. (maybe use plastic instead of metal?)528 Dylan: enrich plants with inorganic compounds; electrical529 interfaces in cellular plant matter => remote-controlled530 photosynthetic/bioluminescent structures.532 - conducting extracellular matrix :: to allow better control of533 organic systems and an enhanced nervous system.535 - cross-modal memory hashing :: a way to retrieve memories more536 robustly.538 - flossing thimble-guards :: (these actually exist)540 - rules + lattice learning :: integrate lattice learning with rules by541 generating hypothetical examples543 - wooden refrigerator :: to give food a better taste Dylan: like544 barrels for wine, or planks for salmon. Maybe just have "flavor545 planks" for your pre-existing fridge. Need to mitigate effect of546 temperature on volatility?548 - radioactive transmutation molecule by molecule :: create precious549 metals or something else economically advantageous.551 - crowd preservation :: inoculate food with tons of harmless552 bacteria so that there's no room for bad bacteria as a method of553 preservation555 - old school preservation :: Pasteur - style holding jar with siphon556 as a way to store liquids at room temperature indefinitely w/o557 refrigeration.559 - restaurant policy :: Throw rude people out of restaurant as a matter560 of course -- make ambiance much better.562 - clean windows :: make something that mixes soap with fire hydrant563 water (and reduces the pressure a bit) and use it564 to clean windows of buildings.566 - ocarina :: make an ocarina out of pure silver568 - fire pen :: pen which burns words on to the page, thus never needing569 any ink. Is there a way to make it runnable from the570 human's energy?572 - website to design your own soda :: and label, and have it mailed to573 you / sell it from your own online store.575 - solar panels :: that float on the ocean577 - handcuffs with more than two cuffs (3?) :: great for daisy chaining578 people, binding them to environment, etc.580 - vector based SOUND files :: like the pictures but with SOUND. codify581 sound in a language with enough symbols so that it can describe582 everything and encode it in that. would be like going from speech583 to text or smtg. Could also store sound as an image of the584 wavefront encoded as a vector image.586 - Mouse :: with a horizontal scroll wheel in addition to the vertical587 scroll wheel589 - logic maintenance system for big institutions :: to make sure the590 things they are thinking about doing are not retarded592 - http://www.regulations.gov/ :: cool site594 - genetically engineered glowing fruit :: sell seeds?596 - memory slide :: IF memories are encoded using particular sensory597 impressions, what happens if the sensory organ598 itself changes? those memories would become599 inaccessible. maybe this is why we can't remember600 much from our childhoods. also, could this happen601 throughout life as well? Could S remember stuff from602 his childhood?604 - make a completely indestructible phone :: no moving parts or display605 you should be able to slam it around all you want, and it will606 just work. brutally simple. aerogel around the battery, minimal607 interface - never gets too hot, and can be dropped into water. no608 holes -- uses field effects for everything from the buttons to609 inductive charging and data transfer.611 - midi to ocarina "tabs" program :: (online website? buy ocarinas from612 it too)614 - 3d printing with sound pulses (or just patterns) :: like the 8.03615 lecture617 - lighter flint on spring :: make hot, throw it at something, and it618 makes sparkles!620 - nuclear energy :: Rebranding New+Clear Energy with informational621 campaign and public debate forum to enforce its622 transparent and open nature. France needn't be the623 world leader in nuclear energy. (Dylan)625 - bubbles :: Engineer a material which has both ductility and high626 surface tension to make the "third"627 minimal-surface-energy solution to a bubble suspended628 between two equal-diameter rings. (Solutions are629 cylindrical catenary curve, two separated half-bubbles,630 and a double-cone)632 - Textbook whose content can be varied continuously :: alter level of633 difficulty, rigor, diction, emphasize crossover with certain634 other discipline, etc. Content generated dynamically from635 knowledge base, along with questions that are moreover altered to636 guide knowledge acquisition. Motivation: One book of637 knowledge. /One./640 ** From Jacob's idea list642 - Roommate-canceling headphones: uses roommate's laptop mic to seed643 noise cancellation alg in your headphones (would this644 work?). -Update on sound canceling headphones that take feed from645 tv: how about ones that cancel people talking on the phone by646 receiving the phone signals and playing inverse sound647 waves. #signalprocessing ~jcole@mit.edu649 - ClackerAlert -- tells if you slam the keys too hard using sound data650 (and speed/jerkiness data)!.Prevents RSI ~jcole@mit.e652 - Panic Pin :: separate pin that you can tell someone if forced to653 identify your PIN (idea from idea about credit cards)