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notfashion

83 karma · joined July 23, 2019

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notfashion··on James Gosling on Richard Stallman [video]
If I were you I wouldn't make a personal ethical stand on this (by not learning GNU software). If you're the only one who does it, it can realistically only hurt you.
notfashion··on The Birth of Standard Error (2013)
https://math.stackexchange.com/questions/253486/name-of-de-m...

As far as I can remember, Wainer doesn't really assert that the equation is known as "de Moivre's equation", that's just what he calls it in the context of his article.

notfashion··on Fractional Brownian Motion for Terrain Generation
I think there's an error in the first bit of example code:

  float fbm( in vecN x, in float H )
  {    
      float t = 0.0;
      for( int i=0; i<numOctaves; i++ )
      {
          float f = pow( 2.0, float(i) );
          float a = pow( f, -H );
          t += a*noise(f*x);
      }
      return t;
  }
Shouldn't "float a = pow( f, -H );" be "float a = pow( i, -H );"?
notfashion··on Fractional Brownian Motion for Terrain Generation
If I understand this correctly, it's not even a matter of using a filter, just a case of summing some random sinusoids with an appropriate weighting for each according to the frequency. You can do this by starting off with noise in the frequency domain and shaping it before doing an iFFT.
notfashion··on A function that represents all primes
Representing an arbitrary sequence of bits, digits, etc. using a real number is the basis for arithmetic coding. As such, it's an approach that has been productive historically, and arithmetic coding continues to be widely used. So the basic idea of encoding whatever you want to encode in a single real number (obviously represented to just enough precision) isn't fruitless and boring. In this case it is a number that is easy to calculate using the formula given, which doesn't at first glance resemble a prime sieve.
notfashion··on John Locke’s Method for Common-Place Books (1685)
What I don't exactly get is how the pages are assigned. It's not really a hashing algorithm in that sense, it's more like a dictionary data structure where the user has to choose the storage locations. It's only possible to work from one end or the other, or more or less randomly. Either way fragmentation will creep in. This looks like it happens in the image of Locke's index.
notfashion··on We Are All Confident Idiots (2014)
The presence of the term "gaslighting" in the comment you are replying to implies that this might be a situation involving narcissism. It's all very well, in a pop psych way, to tell someone "be more zen", but there is little useful overlap between that advice and the course of action that is usually recommended for people dealing with a serious narcissist (to get away from them any way you can).

I don't think you're helping by bringing positive pop psychology and generic consumer zen "mastery" to what is effectively a borderline clinical mental health situation. Narcissism and gaslighting (whatever the actual situation described in the previous comment) are way beyond what can be smoothed away with equanimity and a good attitude. It's unhelpful and a bit condescending to suggest otherwise.

notfashion··on America’s New Sex Bureaucracy
I'm not sure the scenarios "some of my best friends are of the opposite sex" or "some of my best friends are of another race" have much bearing on sexism or racism. Loving someone from a different category doesn't automatically dissolve all antagonism or prejudice—it might just override it in a specific case. Relationships are multidimensional. You would need to provide evidence that these bonds of love/affection somehow erode prejudice toward a given 'other' in general. There are many historic cases of celebrities who have been widely accepted despite massive ongoing prejudice against the group of which they are a member. Affection for celebrities is not the same as familial love, but I do think this suggests that the way people feel about individuals doesn't translate in a simple way to their attitudes to whole groups.
notfashion··on Functor, Applicative, and Monad
This is misleading. There's no place in the specification of Haskell that specifically defines monads as part of the language. They aren't a language feature. They are a pattern which happens to be expressible in Haskell, and which is supported by libraries:

"Haskell's built in support for monads is split among the standard prelude, which exports the most common monad functions, and the Monad module, which contains less-commonly used monad functions. The individual monad types are each in their own libraries and are the subject of Part II of this tutorial."

https://wiki.haskell.org/All_About_Monads#Monad_support_in_H...

The fact that monads are used to implement parts of the language doesn't make them a core part of it. Techniques used in implementation aren't the same as language features.

notfashion··on Show HN: I wrote an Enigma machine emulator for the Web
Each rotor implements a permutation of its input terminals. So maybe more like a p-box, but the difference is significant (only two wires in use at a any time, and one is in "reverse") so probably just thinking of it as a permutation is better.
notfashion··on Irish Teenager Wins Global Science Award for Removing Microplastics from Water
Ireland's per capita level of funding for research has been lagging badly behind the European average, though. It's really a cultural problem: R&D doesn't happen here, except in rare cases. It's not really down to the size of the population: in the 19th C we had Hamilton and Boole, the world's largest telescope in Birr, Grubb telescope manufacturing in Dublin, and the Titanic was built in Belfast in the early 20th C. But independence, for better or worse, saw the Republic kind of divesting itself of technological stuff—it didn't match the national image, and separating from the UK meant that the communication and exchange of technical knowledge became an exception rather than the norm.

So it even has to do with the protestant/catholic divide (science and manufacturing was something "they" did). It's a very painful story, and a lot of Irish tech people have a chip on their shoulder (narcissistic injury) because of our backwardness.

notfashion··on Deterministic thinking: a problem in how we think, not just in how we act
If you read to the end, there's a mention of the premature collapse of the probabilistic inference about some entity. That clarifies what the author is talking about.

The scenario is something like a situation in which individuals are categorized into two discrete groups, and then inference proceeds as if the fate of each individual has been determined by which group they fell into (rather than determined probabilistically). The fact that a discrete categorization is assumed to 'determine' the outcome (the possibility wave function 'collapses' at the moment of categorization) could certainly be referred to as deterministic. I agree that it's not an application of the word that we are familiar with.

notfashion··on A Million Digits of Pi in 9 Lines of JavaScript
I think this section on Wikipedia is relevant: https://en.wikipedia.org/wiki/Approximations_of_%CF%80#Grego...
notfashion··on Physicists finally nail the proton’s size, eliminating an anomaly
It's not a case of an "original headline": this is an entirely separate article, not a regurgitation of the press release. Wolchover is a very serious writer.

It's pretty sickening to watch the (sadly predictable) HN sneering and mockery around the topic of someone's (anyone's) mental health. It's such a cruel, distorted and completely non-constructive conversation. Do you guys really not have anything more interesting to say?

notfashion··on Rekursiv
A bit of googling led to this document: https://www.academia.edu/5256838/Rekursiv_an_object-_oriente...
notfashion··on Mathematician Wins $3M Prize for 'Magic Wand Theorem'
That's fair to say. Rational angles happen to make things easy and result in a problem which has connections with lots of well-developed areas of mathematics.

This paper https://www.math.brown.edu/~res/Papers/intel.pdf is mentioned in one of the Numberphile videos on the topic and it basically says this in the introduction.

notfashion··on Googie Architecture, an Art Form Worth Saving (2014)
The architecturally significant part of the TWA terminal is now a hotel: https://en.wikipedia.org/wiki/TWA_Hotel.

As Wikipedia says, it "straddles" various styles including Googie. I don't think a pure Googie building could be so prestigious. The typical Googie structure is low tech and relatively low cost, "flashy and vernacular" as Wikipedia says. Once you start dealing with an architect like Saarinen (TWA) or Pereira (Theme Building) there is something a bit more sophisticated and expensive going on. Those prestigious buildings don't really epitomize the style, even if we consider them to express some aspects of it in retrospect. Googie has more to do with diners, jukebokes and the fins on a car than with "serious" architecture.

The Changi building really couldn't have been built in the 60s. It's one of those load-bearing triangulated structures with a large number of glazing components of different dimensions. It is much simpler, without CAD, to make a smooth reinforced concrete dome/cantilever like the TWA building, or an arch like the Theme Building. Triangulated high-tech building skins like the one on the Gherkin in London (and Changi) are extremely expensive because of the complexity and the need to custom manufacture each component. There is a fetishization of that complexity (it's the main driver of it) in contrast to the more sculptural preoccupations that are evident in the TWA terminal. Saarinen was moulding concrete (not really a Googie concept) and Safdie is blowing bubbles of super high-tech geometry...

notfashion··on Googie Architecture, an Art Form Worth Saving (2014)
If you mean this building: https://www.safdiearchitects.com/projects/jewel-changi-airpo... then I disagree. That structure couldn't have been achieved with the technology of the Googie era. It's a "high-tech" structure as far as stylistic categorization goes.

It is a bit of a retro design, but it looks back to the scifi environments, megastructures and geodesic domes of the early 70s rather than the stiffer, simpler shapes of Googie.

You could argue that it's what futuristic architecture looks like now, which is probably fair. That doesn't make it a form of Googie.

notfashion··on Quasicrystals
He wrote a book, published in 2018: "The Second Kind of Impossible: The Extraordinary Quest for a New Form of Matter".

But maybe this video is similar in content to the talk you saw?

notfashion··on Quasicrystals
https://en.m.wikipedia.org/wiki/Aperiodic_tiling#Cut-and-pro...
notfashion··on Golden Ratio
The idea is that you can use it anywhere you need to make a decision about proportions. It's not complicated. Designers know that it's no use if you need a proportion close to 1:10 or 1:1, but there is often enough flexibility to use it (say when designing a window or a floor plan.)
notfashion··on Psychiatric Diagnosis Found to Be “Scientifically Meaningless”
A lot of people in the psychiatric field believe that mental illness is due to chemical imbalances in the brain. No tests exist which can detect those imbalances. Your faith in "biology" as the ultimate underlying reality of mental illness is discouragingly close to that medical model of mental illness. This idea that mental distress is essentially biological in character has bad consequences because it ignores the fact that each patient is an agent in continuous interaction with his or her social environment. Mental illnesses, in general, don't develop organically from biological defects. They are often the consequence of trauma and adverse life events, as noted by the authors of this research. Sure, some mental illness is purely biological. Some disorders may be influenced by genetics. But the generic, classic phenomenon of somebody "going crazy" is unlikely ever to be attributable purely to physiological processes. These things come about because of profoundly dysfunctional psychosocial environments.

As a psychiatric professional, you may find it reassuring to predict the future dominance of an objective medical model of mental illness. It would be braver to admit that the complexity of the mind and of the circumstances that lead to mental illness mean that medical research is a very long way from cracking this problem.

notfashion··on Golden Ratio
It might converge more slowly than any other simple continued fraction, but there are some super-slow to converge generalized continued fractions. A couple of examples that are slower than phi: https://en.wikipedia.org/wiki/Approximations_of_%CF%80#Conti...
notfashion··on Boeing's Crashes Expose Systemic Failings
The journalist writing the article may have distorted what he said. Is their a dogma of accident investigation that says there is always a root cause, or is it just a conventional way of working? There are certainly domains in which root cause analysis is inappropriate—psychiatry, for example.

https://en.wikipedia.org/wiki/Root_cause_analysis

notfashion··on A profile of Geoffrey Hinton (2018)
Charles Howard Hinton is actually a very prominent figure in the history of eccentric mathematicians. Anyone who read Rudy Rucker's book about the fourth dimension in the 90s knew about the earlier Hinton's bigamy and superstitions.

https://books.google.ie/books?id=8J0djs-FK_8C&pg=PA65&lpg=PA...

http://www.rudyrucker.com/blog/2009/06/08/alicia-boole-charl...

notfashion··on Japanese architects who treated buildings like living organisms
This is a problem that architects are aware of. It's bad to build with photography and media exposure in mind. But I'm not sure the architect you met was guilty of that. New buildings tend to be documented and published in an unoccupied state. It's the same for most products like cars or furnishings, and you could also argue that the way clothes are advertised has nothing to do with "use".

There's not much architects can do about what happens to buildings after completion. They no longer have a role in the life of the building. I don't think it's necessarily a very bad sign that they sometimes express disappointment or frustration or indifference about the way the building actually ends up being used. They aren't responsible for maintaining it, unlike the authors of software. It is out of their hands.

Every sane architect is OK with the fact that users will adapt their work.

"You know, it is life that is right and the architect who is wrong"—Le Corbusier.

notfashion··on Linguistics Using Category Theory (2018)
Yes, I did (later on) see his "stretch" version of the slogan at the end of the article, but I don't buy it. Everyone knows there are operations that can't be encoded in category theoretic terms, for example a lot of things in analysis. It's silly to claim that it subsumes all concepts.

He also alludes in that final paragraph to Kant (who used the term architectonic in his philosophy) so that's a hint that he has a Kantian perspective in mind. IMO that makes that final paragraph too speculative and frankly just out of scope if we're trying to talk about the design of software. I know a bit about Kant, and it seems to me that he doesn't really have anything to say about what a theory of the design of abstractions would look like. It's all too much of a stretch. Combining philosophers and category theory (take Zalamea for example) seems to produce "architecture astronauts,".

notfashion··on Linguistics Using Category Theory (2018)
Hmmm, I have a strange sense of deja vu in replying to this comment.

There is https://en.wikipedia.org/wiki/Tekt%C5%8Dn which broadly supports your first paragraph.

On the other hand, in architecture, tectonics is usually contrasted with stereotomics. Tectonics is concerned with framing, stereotomy with compressive masses. The former is paradigmatically a branch of carpentry, the latter part of stone-masonry. This is how the words are used in architectural history. See e.g. https://www.campobaeza.com/wp-content/uploads/2016/11/1996_0...

I'm an architectural historian, so I tend to care most about the way the term tectonics functions within architectural discourse. But I think I would translate tecton as carpenter anyway, because of the strong older biblical tradition of doing so, and (independently) the etymology of the word.

'* teks- Proto-Indo-European root meaning "to weave," also "to fabricate," especially with an ax," also "to make wicker or wattle fabric for (mud-covered) house walls."'

https://www.etymonline.com/word/*teks-?ref=etymonline_crossr...

NB the distinction in German between Wand and Mauer. Both mean "wall", but Wand corresponds to the light, woven wattle partition, while Mauer is associated with massive masonry.

One thing that would convince me to drop the architectural association of tectonics with carpentry would be a classical Greek text describing fortifications or other heavy stone masses being built by people referred to as "tecton", since that scenario would strongly suggest that they were not carpenters. The revisionist biblical concerns mentioned on the Wikipedia page seem less relevant to the connotations of the Greek word—they have more to do with recovering the connotations of the text in its original language, before translation to classical Greek.

notfashion··on Linguistics Using Category Theory (2018)
One other thing that has a lot in common with those two is algebraic data types. Products and sums crop up in all these areas. Maybe it's enough to say that with category theory, we feel like we are revealing the "elementary particles" (or rules) of all of these systems.
notfashion··on Linguistics Using Category Theory (2018)
https://zenodo.org/record/584073#.XV8FKmko80M
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