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jonsen

2,274 karma · joined June 26, 2008

Gmail: jonn point jonsen
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jonsen··on IBM debuts sub-1 nanometer chip technology
There are some really dense people
jonsen··on Truth Functional Logic for Hackers
> At every place X in the following expression, introduce a boolean negation if there isn’t one (or, equivanently remove one if there is), and

I think it should read:

At every place X in the following expression, introduce a boolean negation if there isn’t one and remove one if there is, and

Maybe even better:

At every place X in the following expression, introduce a boolean negation. If you get two concecutive NOT's, they can be removed.

Next, I don't see how

  timespent <= duration
is the negation of

  duration > time_spent

?
jonsen··on The Pentium contains a complicated circuit to multiply by three
A shift is faster than an add.
jonsen··on Boom XB-1 First Supersonic Flight [video]
Once I flew north-west at the time of sunset. I had the view of the most beautiful big red sun right at the edge a sea of snow white clouds for more than an hour.
jonsen··on The Innumeracy of the Rulers
> The vote was 136 for and 70 against.

Amazing that apparently noone just realizes that 136 is less than the double of 70.

jonsen··on Reverse engineering the 59-pound printer onboard the Space Shuttle
?: "Since the word processor was irrelevant to the Shuttle, I wonder why this card wasn't removed to reduce weight."

!: "We obtained access to a Shuttle teleprinter (probably a development system that remained on the ground)"

jonsen··on I rewired my brain to become fluent in math (2014)
Granted.
jonsen··on Pencil Talk
I once needed a special blade for my saw. They only offered a 3-pack so I ordered that, and received 3 3-packs.

I don't know, but I felt that I should report it. Fiddled around for som time on their reporting pages, but absolutely no way to report that kind of error.

Are you in my neighborhood? You can have 3 saw blades for one GG1000 ;-)

jonsen··on Ask HN: Looking for Thesis Project Inspiration
Go for what you already have. Use your supervisor to cut and twist your proposal plan to fit 5 months. I don't know where in this world you are, but where I've taught, a master's thesis is about demonstrating what you can do in the time given towards a relevant result. A proposal is a plan. Relevant mileposts should be reached, and the final goal to some extend. But details can be adjusted and cut during the process. A supervisor should help with adjusting the project plan. Up front as well as during your project.
jonsen··on Sellafield: Europe’s most toxic nuclear site
My imagination hears the protesters yell Toxinough! Toxinough!
jonsen··on Sellafield: Europe’s most toxic nuclear site
It is subtle. 'Radio activity' is one word, the same word, in German.
jonsen··on [dead]
I wonder if the, probably accelerating, effect of relocating millions is included in their model.
jonsen··on Modern Pascal is still in the race (2022)
Sure, but "get away with" is not something to strive for in a programming language. I've allways hated C for the unnecessary brainpower it sometimes takes to parse a construct.
jonsen··on Why did the Motorola 68000 processor family fall out of use in PCs?
"by definition" is a little harsh, and "with an x86 processor" is a little too narrow:

"The designation "PC", as used in much of personal computer history, has not meant "personal computer" generally, but rather an x86 computer capable of running the same software that a contemporary IBM PC could.":

https://en.m.wikipedia.org/wiki/IBM_PC_compatible

jonsen··on 111,111.1 meters is reliably 1 degree of latitude
> ...don’t have to do any conversion to distances...

Are you advocating for the use of Manhattan distances for everything?

jonsen··on How Tycho Brahe really died (2001)
As late as 1983 Denmark and Sweden had a dispute about another small island in the area:

https://en.m.wikipedia.org/wiki/Hesselø

jonsen··on A New Physics Theory of Life (2014)
The meaning of life by Jr Minkel

NewScientist 5 October 2002

jonsen··on My history with Forth and stack machines (2010)
You are probably over-interpreting this interpreter.
jonsen··on A supercapacitor made from cement
If they can keep C at the same value in a higher voltage version.
jonsen··on Rain Panels: Harvesting the energy of falling raindrops
No, the kid i Bergen is twelve.
jonsen··on How MOS 6502 illegal opcodes work
> ... uint8 as your only data type

Ahem! uint8 or int8 by the programmers discretions that is.

jonsen··on Ask HN: Is SICP/HtDP still worth reading in 2023? Any alternatives?
3 min × n nor (number of readers)
jonsen··on It's not mathematics that you need to contribute to (2010)
From a comment there:

> Thematically this is similar to a (much longer) essay Dr. Thurston wrote several years ago, which I highly recommend:

https://arxiv.org/abs/math/9404236

jonsen··on Computation and State Machines (2008) [pdf]
Computers are general concrete state machines. Computer programs behave by conducting a computer into a specific state machine behaviour. So it can't be wrong to say that all computer programs describe state machines.
jonsen··on Frozen heads and bodies await revival at this Arizona cryonics facility
But the point is that you don't actually die then, isn't it? So how can it be illegal?
jonsen··on Einstein's Philosophy of Science (2019)
Have you read Anti-philosophical Dictionary:

http://www.naur.com/AntiphilDict.pdf

jonsen··on Finally getting two's complement
Since the decimal number system is "the" system of all number systems (as we are pestered with it from an early age before our brains have developed suitable abstraction capability until it just becomes second nature) it can be advantageous to think through how ten's complement representation works in the decimal number system.
jonsen··on MyNOR – The yet minor computer. No CPU, no ALU, one NOR-gate is enough
Back in time you could buy a 1-bit microprocessor:

https://en.m.wikipedia.org/wiki/Motorola_MC14500B

jonsen··on Can You Change Your Metabolism?
Thanks. Noteworthy:

Since we don’t actually know anything about nutrition, it’s impossible to know whether the new engineered food products are unhealthy.

jonsen··on Everything must be paid for twice (2022)
I have bought a considerable number of books that I have only read partly, skimmed, or not at all. It really took off after reading about Umberto Eco's anti library philosophy; the most important books in your personal library are the books you have not read.
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