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wckronholm

33 karma · joined November 19, 2014

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wckronholm··on A New Wireless Hack Can Unlock 100M Volkswagens
These security issues are not exclusive to computer systems in cars. A valet recently used my physical car key to unlock a different car. (Same make, different model.) He only realized he was in the wrong car when the ignition wouldn't turn.
wckronholm··on [dead]
has to be
wckronholm··on The Outsider Artist Who Built His Own Private “Disneyland”
Dismaland https://en.wikipedia.org/wiki/Dismaland
wckronholm··on Mathematical Notation Is Awful
It might be in Florida. http://www.npr.org/sections/ed/2016/03/01/468695376/french-s...
wckronholm··on GitHub was down
But a human sets it in motion.
wckronholm··on GitHub was down
There's only so far tin can and string will go.
wckronholm··on GitHub was down
All DOS are because of humans?
wckronholm··on A Cute Internet Star Flirts. All He Wants Is Your Password
Why would they? What if he comes back to post another video?
wckronholm··on A Cute Internet Star Flirts. All He Wants Is Your Password
Kids these days.
wckronholm··on Minnesota woman broadcasts police stop and shooting on Facebook Live
fb probably shut it down. It had footage of a shooting. Very sad and grim stuff.
wckronholm··on JUST EAT delivery robots
Not in Philly, at least.

http://www.nytimes.com/2015/08/04/us/hitchhiking-robot-safe-...

wckronholm··on Show HN: Readsure – Pass a quiz that shows you read an article before commenting
I was reminded of this one, instead. https://xkcd.com/481/
wckronholm··on Reasons not to use (i.e., be used by) Facebook
Everything else aside, the first Guardian article linked to under "Miscellaneous" [1] suggests that it will take more than a well reasoned argument to get people to leave facebook.

[1] (https://www.theguardian.com/technology/2016/jan/05/facebook-...)

wckronholm··on Memtype: open source USB password keeper
Wouldn't a 4 digit PIN be really fast to hack? And then all of your passwords are belong to us?
wckronholm··on Stack overflow command line client
From a browser, you can also use bangs to search a specific site from duckduckgo. Stackoverflow is !so.
wckronholm··on SMS Spoofing with Python for Good and Evil
Is there any similar service in the US?
wckronholm··on Google Teapot
Can it make coffee?
wckronholm··on Show HN: Humans.io, a simple CRM to remember the people you meet
It's a neat idea, and yea, support for adding a photo would be nice.

Is there a way to do self hosting? There's no indication whatsoever about what happens to the data that users might enter, and many would see this as a privacy concern.

Is the source code available somewhere?

wckronholm··on Security Win: Burr-Feinstein Proposal Declared “Dead” for This Year
Let's hope it stays dead.
wckronholm··on Google patent: Glue would stick pedestrian to self-driving car after collision
Getting a patent with no real intent of building a product should not be possible.
wckronholm··on Vector Space Systems aims to launch satellites by the hundreds
It should be easy for them to get the satellites up: just point them up and multiply by the right scalar.
wckronholm··on The Basics of Web Application Security
A bit of a bummer that http://evil.martinfowler.com/ resulted in Server Not Found.
wckronholm··on Essential Copying and Pasting from Stack Overflow
It's the only book I've ever written.
wckronholm··on Why 5 x 3 = 5 and 5 and 5 Was Marked Wrong
If the author of this article instead references the definition of multiplication of natural numbers on wikipedia [1], then the student is correct since $a \times b = a + a + \dots + a$ with that definition.

Without access to this particular teacher's curriculum materials, it's not possible to know for sure what definition is being referenced by the "repeated addition strategy". I'm inclined to assume the teacher knows what they're doing and has graded the work appropriately.

There are many comments on this thread about multiplication being commutative by definition, but this is not quite correct. Following the same definition of multiplication I cited above, it is a theorem that $a \times b = b \times a$. When I teach Abstract Thinking (a sort of introduction to proof writing course for mathematics students), I have the students write proofs for this property of multiplication of natural numbers, and the other familiar properties (cancellation, distribution, etc.). If anyone is interested, I've broken the steps out into worksheets that I give to my students, and you can see them at the link below. [2] [pdf] (Multiplication of natural numbers is section 5.5.)

[1] https://en.wikipedia.org/wiki/Natural_number#Multiplication [2] [pdf] http://billkronholm.com/wp-content/uploads/2015/10/MATH280.p...

wckronholm··on The Sierpinski triangle page to end most Sierpinski triangle pages
I don't know. What If I took that page and divided it into <div>'s, removed the middle one, and replaced the others with copies of the original page? Then, I could take each of those <div>'s, break them into pieces, remove the middle one, and replace the others with copies of the original page. Then...
wckronholm··on Show HN: Search free-to-use (CC0) images by keyword, color, attribute
Why does the keyword search drop the final character if it is an 's'? For example, when I search for 'dress' the message I receive is 'Showing 0 images tagged dres'