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dfdz

853 karma · joined January 20, 2020

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dfdz··on Bumblebee queens choose to hibernate in pesticide-contaminated soil
About a decade ago, TIME Magazine published A World Without Bees [1]

Since then, many people seem to think bees are on the edge of extinction.

In fact, there are more bees now than ever before [2]

[1] https://content.time.com/time/covers/0,16641,20130819,00.htm...

[2] https://www.marketplace.org/2024/05/16/honeybee-populations-...

dfdz··on The language you speak changes your perception of time
> Participants were instructed in their respective native languages to estimate roughly how much time it took

If they really want to claim that the “language you speak” changes your perception of time, then they should have avoided the confounding variable of translation discrepancies in experiment instruction.

For example, design some simple UI which does not need to be explained.

dfdz··on A door at a Swedish library was accidentally left open
> They say a reader does not steal and a thief does not read.

Profound or contrapositive [1]?

P = reader

Q = not steal

not P = does not read

not Q = Theif

P - > Q

not Q - > not P

[1] https://en.wikipedia.org/wiki/Contraposition

dfdz··on Thoughts about what worked in math circles
> the story from France of the second-grader who, asked what 2x3 equals, replied "3x2", knowing only that multiplication was commutative.

This is a classic joke making fun of the issues with French education based on the Bourbaki [1] school of mathematics, see [2] for more discussion. Different issues than the USA, but also bad in my opinion.

[1] https://en.m.wikipedia.org/wiki/Nicolas_Bourbaki

[2] https://web.archive.org/web/20230315185224/https://www.uni-m...

dfdz··on On the paper “Exploring the MIT Mathematics and EECS Curriculum Using LLMs” [pdf]
https://arxiv.org/abs/2306.08997

“arXiv will not consider removal for reasons such as journal similarity detection, nor failure to obtain consent from co-authors, as these do not invalidate the license applied by the submitter”

The submitter can mark the paper as “withdrawn” but it will remain available

https://news.ycombinator.com/item?id=32780403

dfdz··on Tell HN: It is impossible to disable Google 2FA using backup codes
Best advice in this thread:

https://landing.google.com/advancedprotection/

dfdz··on Best Calculator for a Nerdy Child
I did not realize RPN is not available for CAS, that is disappointing.

Is an HP 50G really the last of its kind? Hard to suggest since it’s priced like a collectors item now…

dfdz··on Best Calculator for a Nerdy Child
HP Prime on Reverse Polish Notation (RPN) mode [1, Page 47]. RPN is a basic stack based programming language, which is really fun to use [2].

[1]https://h30434.www3.hp.com/psg/attachments/psg/palm-webossof...

[2]https://en.m.wikipedia.org/wiki/Reverse_Polish_notation

dfdz··on I worked at LastPass as an engineer
One key feature of 1Password is the use of a secret key in addition to a master password.

See page 10 [1] which explains how the secret key provides extra entropy (which makes it much harder to brute force a user who choses a weak password). Also see Story 1 on page 11 [1].

[1] https://1passwordstatic.com/files/security/1password-white-p...

dfdz··on Fusion breakthrough is a noteworthy step
> Fusion “Breakthrough” Won’t Lead to Practical Fusion Energy

>Just one more step on the long road to commercialization

Road

noun

1. a wide way leading from one place to another

2. a series of events or a course of action that will lead to a particular outcome.

Source: google

dfdz··on Turing Machines Are Recurrent Neural Networks (1996)
Turning Machines Are Magic: The Gathering [1]

[1]https://arxiv.org/abs/1904.09828

dfdz··on Cheat Codes for Life I Know at 36 That I Wish I Knew at 26
> "Busyness is a sign of poverty that will eventually lead to personal bankruptcy"

"People who like pseudo-profound quotes are not so smart, science says" [1,2]

[1] https://qz.com/566050/people-who-like-pseudo-profound-quotes...

[2] https://journal.sjdm.org/15/15923a/jdm15923a.pdf

dfdz··on Starlink Aviation
> flex, not a tool

Suppose that a plane has 250 seats and makes 50 trans-con flights a month.

Airline A decides to advertise having fast internet access in their flight, and raises ticket prices by $2 a seat to fund it.

(250)(50)(2) = 25000

Airline B stays with slow barely usable internet.

Which ticket do you book?

dfdz··on Ask HN: LaTeX is great. Has anyone tried to build something better?
This does not directly address your question, but it does really help with finding errors:

https://ctan.org/pkg/texfot?lang=en

texfot – Filter clutter from the output of a TEX run

The package provides a small Perl script to filter the online output from a TEX run, attempting to show only those messages which probably deserve some change in the source. The TEX invocation itself need not change.

I would highly suggest using it!

dfdz··on Tell HN: ArXiv won't let authors remove their paper from the website
> ArXiv won't let authors remove their paper from the website

This is an essential feature of arXiv to maintain academic integrity and encourage serious academic submissions.

If you realize that your paper contains an error, then you can mark the paper was "withdrawn". People have limited time so if you do this no one read the paper (everyone makes mistakes sometimes).

As long as you do not make a habit of uploading and withdrawing papers, then it will not matter.

dfdz··on Who owns Tesla’s data?
I expect more from IEEE than a bait-and-switch:

> license plate on that car showed that it was registered to ... Steer EV ... Agents served a subpoena on Steer EV for the renter’s billing and contact details. Steer EV provided those—and also voluntarily supplied historical GPS data for the vehicle ... In this case, the GPS data likely came from a device Steer EV itself installed in the vehicle

> according to researchers, Tesla is potentially in a position to provide similar GPS tracks

dfdz··on Controversy continues over whether hot water freezes faster than cold
In case you missed this in the article, the effect you described is a possible explanation of why the effect happens …

> Or perhaps external factors come into play: A layer of frost in a freezer can act as an insulator, keeping heat from leaking out of a cold cup, whereas a hot cup will melt the frost and cool faster.

dfdz··on Dropbox Shop Beta
On hacker news, it is equal plausible that the comment is being downvoted since it is not completely serious, so I will add the disclaimer that:

The purpose of my above comment is to add to the conversation by considering this development on the context of past community response to Dropbox product announcements

dfdz··on Dropbox Shop Beta
I have a few qualms with this app.

As a shopify user, you can already build such a system for yourself quite trivially. From the Shopify organization admin, click Stores. Click Create store. In the Store type section, select the purpose of your new store. In the Store details section, enter a name and an URL.

dfdz··on Contra Wirecutter on the IKEA air purifier
> Their move to a paid subscription was very odd

above several people note that

> the IKEA one … is the only one in the article they don't earn a commission on when someone buys it

How do you want wirecutter to stay economically viable?

dfdz··on Policy punishes disabled people who save more than $2k
This is a horrible policy, but it seems there is a possible solution (for people with good enough credit, which means the most vulnerable people cannot do this):

Get a mortgage on house that will take a while to pay off.

In order to “save” you pay extra towards the mortgage

In order to “withdraw” money (if needed) you take out a small loan against the house

Some bank should make a mobile app which does this, in combination with Zelle.

SuperHomeSaverApp

With free instant transfer between your bank accounts and home

dfdz··on Practical bruteforce of AES-1024 military grade encryption
I disagree that the title is click bait. The AES standard is only defined for 128, 192 and 256 bits [1], but in the title the author mentioned breaking AES-1024.

So it is clear to technical readers that the title contains a joke, which will be explained in the article (the joke turns out to be poorly written software).

[1] https://en.m.wikipedia.org/wiki/Advanced_Encryption_Standard

dfdz··on 'Rater' is paid $10 hourly to teach Google's algorithm
This criticism seems unfair.

There is nothing wrong with semi-supervised learning.

dfdz··on Why isn’t there a decent file format for tabular data?
I think CSV is a decent file format for tabular data. The author claims that CSV files are

> difficult to parse efficiently using multiple cores, due to the quoting (you can’t start parsing from part way through a file).

But I do not see why this is the case.

Step 1: loop over file (in parallel) to determine indices of quote characters

Step 2: loop over indices outside quote regions (in parallel) to determine indices of comma and return characters

Step 3: return two dimensional integer array with pointers to cells of table

dfdz··on An update on the campaign to defend serious math education in California
> 249,871 High School Mathematics Teachers in USA [1]

> 5,972 Math Professors in USA [2]

1. There are simply not enough college math professors for this to work.

[1] https://www.zippia.com/high-school-mathematics-teacher-jobs/...

[2] https://www.zippia.com/math-professor-jobs/demographics/

dfdz··on To Get into the Ivy League, “Extraordinary” Isn’t Always Enough These Days
The student is

> ranked 23rd out of 668

students at a mediocre public high school [1].

[1]https://www.usnews.com/education/best-high-schools/texas/dis...

dfdz··on Ask HN: Can the same individual accomplish more with programming than proofs?
There are about 30 million coders in the world [1]

And about 80 thousand mathematicians [2]

So about 375 individuals programming for every 1 person writing proofs

If we assume this configuration is optimal, then my answer to your question is that if you had a group of 10000 people who like programming and proofs and have 9983 program and 27 write proofs this would be the best way to “accomplish more in life”

[1] https://www.future-processing.com/blog/how-many-developers-a...

[2] https://mathoverflow.net/questions/5485/how-many-mathematici...

dfdz··on Etsy Strike
> End the Star Seller Program

I did not know exactly what the star seller program was. It requires that in the last three months of shop data [1]:

> 95%+ of first messages in a thread are responded to within 24 hours.

> 95%+ of orders ship on time with tracking

> 95%+ of orders receive 5 star reviews

> minimum of 10 orders and $300 in sales

In the petition [2] they explain the Star Seller Program as:

>Passive aggressive efforts to influence seller behavior are counter-productive and result in a worse customer experience. Rather than making us mad at buyers who leave glowing 4-Star reviews, or making us feel that we can no longer offer letter class shipping on items like cards and stickers, Etsy should leave us to individually do the best we can for each and every customer in each and every situation.

[1] https://www.etsy.com/starseller

[2] https://www.coworker.org/petitions/cancel-the-fee-increase-w...

dfdz··on Stanford prof calls cops on Berkeley prof who exposed her $5K/hr consulting fee
Here is a much better summary of what happened from Boaz Barak:

https://mobile.twitter.com/boazbaraktcs/status/1511366075035...

dfdz··on Ask HN: Do you believe in GNU's Free Software?
> Do you believe in Free Software?

What does it mean to "believe" in Free Software?

I believe Free Software (as defined in your post) exists and will continue to exist for the foreseeable future.

> Is free software a lost cause?

This question seems to assume that Free Software is a cause, which is notably absent from the GNU definition you presented.

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