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Today in CV Dazzle news: making self-driving cars read stop signs as speed limit signs.

jwz
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Robust Physical-World Attacks on Machine Learning Models

Our algorithm can create spatially- constrained perturbations that mimic vandalism or art to reduce the likelihood of detection by a casual observer. We show that adversarial examples generated by RP2 achieve high success rates under various conditions for real road sign recognition by using an evaluation methodology that captures physical world conditions. We physically realized and evaluated two attacks, one that causes a Stop sign to be misclassified as a Speed Limit sign in 100% of the testing conditions, and one that causes a Right Turn sign to be misclassified as either a Stop or Added Lane sign in 100% of the testing conditions.

Previously, previously, previously, previously, previously, previously.

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Levitz
13 days ago
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jimwise
14 days ago
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duerig
10 days ago
This makes me think of a machine learning project I heard about from a while back where some military project was trying to get a heuristic that would detect whether a tank was in a picture or not. After passing the initial evaluation with flying colors, it suddenly became extremely erratic on later evaluations. Researchers later figured out that in the initial tests, all the pictures with tanks were on sunny days and all the pictures without were on cloudy days. The algorithm had figured out how to detect clouds and not tanks. And this is the fundamental problem with machine learning. You can never be sure that it is learning what you think it is learning.

Rations for various RPG Races (From wats6831 on /r/RPG)

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Dwarf https://imgur.com/GI0Pu3L Garlic chicken livers, smoked and peppered cheese, spiced pork sausages, hard tack, dried vegetables, dried wild mushrooms.

Elf http://imgur.com/ZIoWm5D Top left to right: Evereskan Honey Comb, Elven Travel Bread (Amaretto Liquer Cake with custom swirls), Lurien Spring Cheese (goat cheese with garlic, salt, spices and shallots), Delimbyr Vale Smoked Silverfin (Salmon), Honey Spiced Lichen (Kale Chips), and Silverwood Pine Nuts.

Halfling http://i.imgur.com/Qk5TN5e.jpg from upper left: "Honeytack" Hard tack honey cakes, beef sausage, pork sausage mini links, mini whole wheat toast, cranberry cheddar cheese mini wedge, mini pickles, pumpkin and sunflower seeds, lower right is my homemade "travel cake" muesli with raisins, golden prunes, honey, eggs and cream.

Half-Orc https://imgur.com/gallery/HKWns Came wrapped in cheesecloth and tied in burlap package. Forest strider drumsticks, molasses sweet wheat bread "black strap", aged Munster, hard boiled eggs, mixed wild nuts

Orc http://imgur.com/a/KSAmn Orcs aren't known for their great cuisine. Orcs prefer foods that are readily available (whatever can be had by raiding), and portable with little preparation, though they have a few racial delicacies. Toughs strips of lean meat, bones scavenged from recent kills, and dark coarse bread make up the bulk of common orc rations.Fire roasted rothe femur (marrow is a rare treat) [beef femur], Strips of dried meat (of unknown origin) [homemade goose jerky], foraged nuts, only edible by orcs....nut cracker tusks [brazil nuts], coarse black bread, made with whatever grains can be pillaged [black sesame bread], Pungent peppers [Habanero peppers stuffed with smoked fish and olives].

Gnome http://imgur.com/gallery/15ssO Pan fried Delimbyr smelt, spiced goat cheese (paprika crusted hand pressed Fontina), Gnome shortbread (savory pistachio), glass travel jar filled with Secomber Red (wine), hard boiled quail eggs packed in rolled oats (to keep safe), dried figs from Calimshan, and Southwood smoked goat sausage (blood sausage).

Lizardfolk http://imgur.com/a/BeoIu Lizardfolk are known to be omnivores, forage for a surprising variety of foods found within the confines of their marshy environs, in this case the Lizard Marsh near Daggerford. Fresh caught boiled Delimbyr Crayfish on wild chives, coastal carrageen moss entrapping estuary brine shrimp (irish moss, dried brine shrimp), Brackish-Berries (blackberries), Blackened Dart-Frog legs (frog legs) on spring sprouts (clover sprouts), roasted bog bugs on a stick!

Drow http://imgur.com/a/5cEUA From top left: Menzoberranzan black truffle rothe cheese (Black Knight Tilsit), Donigarten Moss Snails (Escargot in shallot butter sauce), Blind cave fish caviar in mushroom caps (Lumpfish caviar), faerzress infused duck egg imported from the surface Realms (Century egg), Black velvet ear fungus (Auricularia Black Fungus Mushroom).

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Levitz
28 days ago
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Voor de D&D peeps
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Sony CCD datasheet or timecube dot com

jwz
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Levitz
32 days ago
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:The Aestivation Hypothesis for resolving Fermi's Paradox

jwz
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That is not dead which can eternal lie:

If a civilization wants to maximize computation it appears rational to aestivate until the far future in order to exploit the low temperature en- vironment: this can produce a 1030 multiplier of achievable computation. We hence suggest the "aestivation hypothesis": the reason we are not observing manifestations of alien civilizations is that they are currently (mostly) inactive, patiently waiting for future cosmic eras. This paper analyzes the assumptions going into the hypothesis and how physical law and observational evidence constrain the motivations of aliens compatible with the hypothesis. [...]

As the universe cools down, one Joule of energy is worth proportionally more. This can be a substantial (1030) gain. Hence a civilization desiring to maximize the amount of computation will want to use its energy endowment as late as possible: using it now means far less total computation can be done. Hence an early civilization, after expanding to gain access to enough raw materials, will settle down and wait until it becomes rational to use the resources. We are not observing any aliens since the initial expansion phase is brief and intermittent and the aestivating civilization and its infrastructure is also largely passive and compact. [...]

As noted by Gershenfeld, optimal computation needs to make sure all internal states are close to the most probable state of the system, since otherwise there will be extra dissipation. Hence there is a good reason to perform operations slowly. Fortunately, time is an abundant resource in the far future. In addition, a civilization whose subjective time is proportional to the computation rate will not internally experience the slowdown.

Previously, previously, previously, previously.

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Levitz
100 days ago
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Total Deductibility

jwz
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Calvinist Health Insurance Company Declares All Conditions Pre-Existing

SANFORD, FL -- A newly formed health insurance company owned by a group of devoted Calvinists announced that they will not cover any health condition, since every condition of humankind was pre-existing and established by sovereign God before the foundation of time.

The company, Total Deductibility, states clearly in its bylaws that "pre-existing conditions may not be covered, which include every possible ailment and so-called 'accident,' all of which God foreknew and predestined to occur prior to the existence of the client's policy, and time itself." The firm was thrilled when the new GOP health care law, which drops the requirement to cover some pre-existing conditions, passed the House, according to a company spokesperson.

"We can now reject every single claim, based on its pre-existing status," she told reporters. "Whether or not the client was aware of the condition has no bearing; God sovereignly pre-arranged every condition before the dawn of the universe, and therefore we must refuse all claims based on this truth."

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Levitz
100 days ago
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Datasaurus Dozen

jwz
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Generating Datasets with Varied Appearance and Identical Statistics through Simulated Annealing

Anscombe's Quartet is a set of four datasets, where each produces the same summary statistics (mean, standard deviation, and correlation), which could lead one to believe the datasets are quite similar. [...]

Recently, Alberto Cairo created the Datasaurus dataset which urges people to "never trust summary statistics alone; always visualize your data", since, while the data exhibits normal seeming statistics, plotting the data reveals a picture of a dinosaur. Inspired by Anscombe's Quartet and the Datasaurus, we present, The Datasaurus Dozen:

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Levitz
109 days ago
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I _will_ bring up the Datasaur at work at the next opportunity!
jlvanderzwan
100 days ago
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jimwise
107 days ago
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