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rrmm

1,581 karma · joined July 9, 2012

mrrrrrmmmm+hackernews@gmail.com
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rrmm··on ElonJet Is Now Suspended
Surely, this will be addressed in the next installment of the "Twitter Files". /s
rrmm··on NASA – Artemis I Liftoff
Seconded. I enjoyed the launch (which I watched on several streams carrying NASA coverage). Ultimately, NASA gets money to launch payloads not entertain people, but there is a great opportunity to increase public excitement and engagement. SpaceX's production formula (which built on NASA's) seems quite successful.

I agree I want to see a scaled timeline with upcoming milestones. I'd like to see basic telemetry (speed, alt, attitude) and a T count at all times, (with an estimated launch time (L-time) before launch). I actually like the way ISRO and ESA present time vs altitude and time vs velocity graphs with an expected line and an actual telemetry line. So I'd welcome something like that.

We got video from some engineering cameras later on in the launch, but the more the merrier; views of Earth from the rocket can be spectacular. Of course there's a practical matter of support for them and TDRS downlink bandwidth, but I think the outreach value of them should be a consideration for NASA.

rrmm··on NASA – Artemis I Liftoff
Red Team makes the rocket run on time. Loved that they brought them out.
rrmm··on NASA – Artemis I Liftoff
TLI successful and orion is away.
rrmm··on A Wordle clone in 50 lines of Bash
Here's my straight javascript version https://github.com/rrmm/mastermind-word . But it isn't particularly source length efficient.
rrmm··on A Wordle clone in 50 lines of Bash
Here's my straight javascript version: https://github.com/rrmm/mastermind-word
rrmm··on Intel Sells SSD Business and Fab to Sk Hynix, New 'Solidigm' Subsidiary Planned
I thought Hynix was South Korean; the fab was located in China. Or am I misunderstanding things?
rrmm··on Swedes were fooled by one of the biggest scientific bluffs of our time (2020)
The symptoms of depression and criteria are contained in the DSM. They don't involve brain chemistry or functioning (per se), e.g. "Recurrent thoughts of death, recurrent suicidal ideation without a specific plan, or a suicide attempt or a specific plan for committing suicide."

The underlying reasons for those symptoms may involve chemical imbalances, but those aren't established or tested for. They don't take a CSF sample or do an MRI for a diagnosis.

rrmm··on Tools to Explore BGP
I'm surprised large users don't have a simulate-before-issuing BGP-changes policy given the number of times BGP has bitten people. I imagine the devil would be in the differences between your sim and actual behavior, but it might save a few people a lot of pain.
rrmm··on Toyota to Launch All-New Aqua (Prius C) with new bipolar nickel-hydrogen battery
Aqua is the nameplate in Japan. Prius-C elsewhere. New battery technology apparently for NiMH and a higher electric-only mode speed (before the ICE kicks in).

Toyota seems to prefer the NiMH batteries as they've got a long history with them and a mature (and highly regarded) system. I think it might also avoid patents and other entanglements with Li-ion.

rrmm··on No bids for over 70% of Indian coal mines up for auction
The mines probably come with liabilities of all sorts.
rrmm··on How The Chronicle is trying to malign Sci-Hub
The authors give the rights over to journal when they submit the paper. The authors depend on publishing in high impact-factor journals for tenure and continued funding.

Not all academics support it and several groups have opted out, publishing in open access only or organizing their own journals and conferences.

rrmm··on An AI wolf that preferred suicide over eating sheep
The numbers are indeed arbitrary. But ultimately you want to avoid low utility/reward action and continue high utility/reward actions. That behavior, trying to avoid or pursue actions, would be indicative of the state of distress regardless of an arbitrary number attached to it.
rrmm··on An AI wolf that preferred suicide over eating sheep
One thing I've been considering: At what point does a creator have a moral or ethical obligation to a creation. Say you create an AI in a virtual world that keeps track of some sense of discomfort. How complex does the AI have to get to require some obligation? Just enough complexity to exhibit distress in a way to stir the creator's sympathy or empathy?

The glib answer is never, of course. And one easy-out, I can think of is setting a fixed/limited lifespan for the AI and maybe allow suicide or an off-button. So the AI can ultimately choose to 'opt-out' should it like; and at least, suffering isn't infinite or unending.

It reminds me of reactions to testing the stability of Boston Dynamic's early pack animal. The people giving the demo were basically kicking it, while the machine struggled to maintain its balance. The machine didn't have the capacity to care, but to a person viewing it, it looked exactly like an animal in distress.

rrmm··on A first lesson in meta-rationality
Yeah I think a lot of it is learning to think like how the people who thought up the problem think.

It still may not be a bad exercise (like art students at a gallery copying a master's work), but you shouldn't get too far ahead of yourself claiming it's some sort of 'exercise in pure reason'.

rrmm··on A first lesson in meta-rationality
There's no necessity (in general) that a new image should be able to be classified under the rule. If I give you two finite groups A={1,3,9,-2} and B={7,-11,i,5} and the rule actually is tautological, Then a new number 22 doesn't belong to either group under the rule.

A few of the examples from the article actually are similar. The two circles where one circle is either clockwise or counterclockwise from the nearest indention only admits pictures with two circles, one on the surface of the other and an indentation. There are images which wouldn't fit into either.

A math professor of mine was illustrating this point with number series (of the sort on aptitude tests, eg squares,arithmetic sequences, etc), by listing an obvious sequences whose completion ended up being an obscure function which diverged at the next point.

So, the trivial solution (and the more ultra-complicated solution) is defective basically because it's not interesting under the rules of the game which assumes the answer is somehow interesting, but not impossible to guess.

rrmm··on A first lesson in meta-rationality
Ex post facto rationalization is a major annoyance of mine. Let's just be honest with ourselves and recognize that lots of what we want isn't rational. That's ok, use your rationality to keep yourself from making huge, dumb mistakes, but don't pretend you're doing it for "rational" reasons or through a "rational" process.

But I'm kind of over-strict about it and like to reserve "rational" for processes you can do with first-order logic. Given the complexity and lack of information in real life, that happens almost never. Of course this is not a terribly rational point of view.

rrmm··on A first lesson in meta-rationality
These sorts of tasks are teaching you how to think a specific way which our society promotes. Mechanistic, natural, causal, rational (in the first-order logic sense) with a healthy dose of Ockham's razor and simplicity as an aesthetic.

I stress though, I'm a big fan of these things and the innovations they have enabled, but you still have to understand that they are an axiomatic underpinning. It's like Euclid's parallel postulate in a way: There is non-euclidean geometry out there.

rrmm··on A first lesson in meta-rationality
Broadly, for example, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2838233/

"""

Analytic cognition is characterized by taxonomic and rule-based categorization of objects, a narrow focus in visual attention, dispositional bias in causal attribution, and the use of formal logic in reasoning. In contrast, holistic cognition is characterized by thematic and family-resemblance-based categorization of objects, a focus on contextual information and relationships in visual attention, an emphasis on situational causes in attribution, and dialecticism (Nisbett, Peng, Choi, & Norenzayan, 2001).

"""

This also comes up a lot in cognitive test design.

The anecdote I've always heard in reference to it was

""" What is considered wise in one society may not be considered wise in another; the value and meaning of intelligence depends on cultural norms. Demonstrating the culturally-specific nature of knowledge and intelligence, Cole, Gay, Glick, and Sharp (1971) conducted an experiment in which Western participants and Kpelle participants from Liberia were given an object-sorting task. Participants were asked to sort twenty objects that were divided evenly into the linguistic cat-egories of foods, implements, food containers, and clothing. Westerners tended to sort these objects into the groups for food and implements, while Liberian partici-pants would routinely pair a potato with a knife because, they reasoned, the knife is used to cut the potato. When questioned, Liberian participants justified their pairings by stating that a wise person would group the items in this way. When the researchers asked them to show what an unwise person would do, they did the taxonomic sort that is more familiar to the Western culture. """

quoted from https://uscaseps.org/wp-content/uploads/2020/07/standardized...

rrmm··on A first lesson in meta-rationality
Not an alternative to systematization, but different systems. Just that the analogies or groups that make sense to one group may not make sense to others.
rrmm··on A first lesson in meta-rationality
The fact that the solution of these problems is in some sense satisfying also has a lot to do with the fact that the people making these problems are Western systematic-thinkers. They think like us (because we were trained by them).

That's not to say there isn't value in learning this way of thinking, it's gotten society a long way.

rrmm··on A first lesson in meta-rationality
Don't worry you can always solve these problems trivially: The examples on the left side are all on the left side, while the examples on the right side are not.
rrmm··on A first lesson in meta-rationality
You also have to know you want to solve a problem.

Once you get to the point where you have any hypothesis whatsoever, no matter how weak, a systematic approach (saving examples as test cases) helps to avoid confirmation bias and makes testing further hypothesis less costly.

Another hard one is when there is a simple, probabilistic rule. You usually end up with an over-complicated rule to cover all your data instead of the true rule. (Of course that gets down to what is at the basis of the probability: are you satisfied with a probability?)

rrmm··on Mathematicians Identify Threshold at Which Shapes Give Way
Holder spaces. https://math.ucdenver.edu/~jmandel/classes/7760f05/spaces.pd...

"""

Let Ω be an open set in Rn, 0<α≤1, and k a nonnegative integer. The (uniform) Holder spaces Ck,α(Ω) consist of functions whose k−th order derivatives are uniformly Holder continuous with exponent α in Ω. The(local) Holder spaces Ck,α(Ω) consist of functions whose k−th order derivatives are locally Holder continuous with exponent α

"""

The Holder continuity condition looks sorta like the limit definition of a derivative with an exponent on the denominator.

Also: https://en.wikipedia.org/wiki/H%C3%B6lder_condition

rrmm··on Vaccine-Induced Covid-19 Mimicry Syndrome
I think this research is seeking to explain the disparity between the AZ vaccine reactions and others.
rrmm··on Two men arrested with 7 kg radioactive uranium in Mumbai
This article says it's 'natural uranium' https://ca.finance.yahoo.com/finance/news/two-arrested-7kg-n...
rrmm··on Challenges Building an Open-Source E Ink Laptop
Yeah,the technical challenge of getting something working usually end up being the easier part. Manufacturing ends up being very difficult: at a small scale, it's super expensive and at a medium to large scale, logistics becomes difficult.

At every scale changes to the design (either for enhancements or EOL parts) is expensive. Injection molding dies require significant engineering, setup, and futzing-with to bring to production. More recent innovations in mfr'ing can be helpful (speed up prototyping and lower the cost of spinning molds or dies) but can't completely liberate you from the difficulties.

I would love to see stuff like this succeed, but the difficulty can't be underestimated.

rrmm··on “They introduce kernel bugs on purpose”
The ban is aimed more at the UMN dept overseeing the reserach than at preventing continued "experiments." I imagine it would also make continued experiments even more unethical.
rrmm··on “They introduce kernel bugs on purpose”
I liked this bit, from the footnotes: "Contributors: RWY had the original idea but was reluctant to say it out loud for years. In a moment of weakness, he shared it with MWY and BKN, both of whom immediately recognized this as the best idea RWY will ever have."
rrmm··on The Health Hazards of Plug-In Air Fresheners (2017)
On top of that, essential oil purity is probably not exactly well regulated. Depending what chemicals are used to do the extraction, there can be nasty stuff left over not to mention adulterants or other random stuff.
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