jhncls

16 ms·

151.
by jhncls 6y ago
sdf stands for "signed distance function". It helps the magic of ShaderToy [0] to obtain real time rendering in the browser. Note how the animations on the ShaderToy website aren't videos but real-time renderings. See e.g. h
152.
by jhncls 6y ago
Press release from the university: https://www.imec-int.com/en/press/belgian-security-researche...
153.
by jhncls 6y ago
This topic was also discussed one week ago: https://news.ycombinator.com/item?id=25065921
154.
by jhncls 6y ago
That's why someone invented Youglish [0]. However, I mostly use that site for words I know how to pronounce correctly, but have no idea how people expect them to be pronounced in their language. Did you know you are supposed to explici
155.
by jhncls 6y ago
A surprising bit twiddling trick[0] uses a De Bruijn sequence to calculate log base 2. [0] https://graphics.stanford.edu/~seander/bithacks.html#Integer...
156.
Neuropilin-1 facilitates SARS-CoV-2 cell entry and infectivity(science.sciencemag.org)
50 points by jhncls 6y ago|10 comments
157.
by jhncls 6y ago
What's unintuitive about the Monty Hall problem is the difference between mathematical Monty and a psychological Monty. It is easy to imagine Monty almost only opening doors in case the guest choose the car, and not opening anything in
158.
by jhncls 6y ago
Well, wikipedia writes The only remaining unsolved cases up to 1,000 are 114, 390, 579, 627, 633, 732, 921 and 975 . [0] https://en.wikipedia.org/wiki/Sums_of_three_cubes
159.
by jhncls 6y ago
You can download a gzipped postscript version at https://www-cs-faculty.stanford.edu/~knuth/papers/randomness...
160.
by jhncls 6y ago
Dennis Yurichev also wrote an awesome free book about creating SMT/SAT code to solve real-world (and less real-world) problems. [0] https://sat-smt.codes/
161.
David Eagleman: Neuroplasticity and the Livewired Brain(youtube.com)
1 points by jhncls 6y ago|0 comments
162.
by jhncls 6y ago
Lex Fridman had an interesting interview with Don Knuth close to his 82nd birthday[0]. It's fascinating to learn how much energy he still spends at verifying and investigating each aspect of newly published algorithms. E-mail would pr
163.
by jhncls 6y ago
It's indeed a nice guide. One place where the intuition stops unexpectedly, is calculating the probability of getting 2 reds balls out (without replacement). In the situation with all balls together, the chance would be 1/4. But
164.
by jhncls 6y ago
Vi Hart is amazing with flexagons [0]. [0] https://www.youtube.com/watch?v=VIVIegSt81k
165.
by jhncls 6y ago
Sister Celine[0] is another sister who, with a PhD in math, had an important influence on algorithms to calculate explicit formulas for many recurrence relations. [0] https://en.wikipedia.org/wiki/Mary_Celine_Fasenmyer
166.
by jhncls 7y ago
Well, his question was "Who is Monte Carlo?", a witty reference to the fact that Monte Carlo is named after a real prince [0]. [0] https://en.wikipedia.org/wiki/Charles_III,_Prince_of_Monaco
167.
by jhncls 7y ago
Did other people also wonder what a French cleat might be? It is a molding with a 30–45 degree slope used to hang cabinets or other objects. [0] https://en.wikipedia.org/wiki/French_cleat
168.
by jhncls 7y ago
What's really disturbing and hard to doubt is the growing daily death count in a country as Italy [1] [1] https://www.worldometers.info/coronavirus/country/italy/#gra...
169.
by jhncls 7y ago
After a Numberphile's video instigated the search of how to write 42 as the sum of 3 third powers, a 3Blue1Brown's video influenced the world of quantum search. It makes one wonder how much there still is to discover thanks to ast
170.
by jhncls 7y ago
In those times, most would be happy a wall looked straight, and vertical enough to not fall. Also, a circular wooden object (a spool, wagon wheels, ...) could help to maintain the forms. The Dutch Wikipedia mentions many variants formed f
171.
by jhncls 7y ago
While this type of wall mainly exists in England and the Netherlands, it is amusing how the English Wikipedia's main arguments are about saving bricks and possible military advantages, while the Dutch Wikipedia tell these walls are mea
172.
by jhncls 7y ago
In the paper [0] there is more info than just what's explained in the simplified blog post. A.I. is needed if you want to do the same without the color chart used for training it. Furthermore, it is not just color correction, also back
173.
by jhncls 7y ago
Just 3 weeks ago someone uploaded a video of Neil Sloane talking about his encyclopedia. At his 80th birthday he is as vivid and enthusiastic as always. https://vimeo.com/365825314
174.
by jhncls 7y ago
With more than 3 doors, it is essentially a different problem. Imagine an evil host who only opens a door and offers to switch when the guest chose the door with the car, and not offer to switch during other episodes. Or, more evil, infrequ
175.
by jhncls 7y ago
Something that really adds to the confusion, is that "in a not mathematically perfect" world, the observer doesn't know whether the host will always open a door. When the candidate chooses the winning door, the host could alw
176.
Old and New Problems from 55 Years of the OEIS(vimeo.com)
1 points by jhncls 7y ago|0 comments
177.
by jhncls 7y ago
Grant Sanderson manages to combine his compelling narrative style with elegant animations. The solution to the chosen puzzle only depends on very straightforward mathematical knowledge. Grant shows a possible route towards discovering the i
178.
by jhncls 7y ago
The 58 year old was an excellent carpenter, specialized in ship interiors. He did not live at the farm, but visited it daily with food and stuff such as toilet paper. Towards the outside world he was just refurbishing the old farm. Very wei
179.
by jhncls 7y ago
Parent Effectiveness Training: https://www.gordontraining.com/parent-programs/parent-effect... https://www.parentskills.com.au/blog/pet-page-summary-skills...
180.
by jhncls 7y ago
Does anybody else see a parallel with the Turpin family case that came to light last year? https://en.wikipedia.org/wiki/Turpin_case

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