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jointpdf

1,327 karma · joined November 11, 2018

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jointpdf··on Organ transplant patients may not get dementia
This is quite the display of unnecessary credentialism. It’s a blog. A nicely-designed and seemingly useful one at that (I’m finding this post on IBS to be a handy summary and pointer to studies: https://trevorklee.com/a-complete-guide-to-self-diagnosing-a...).

From what I can tell, this is a humble, curious, and well-meaning guy that funds his menagerie of research interests with a successful tutoring business (a noble career in and of itself). I see absolutely no need to frame him as an unworthy crank.

jointpdf··on Building a recommendation engine inside Postgres with Python and Pandas (2020)
As of a few days ago (Apache Spark 3.2 release), you can use the pandas API on a Spark cluster: https://databricks.com/blog/2021/10/04/pandas-api-on-upcomin...
jointpdf··on This word does not exist
Frankly, I am feeling a bit targeted by my random word selection:

——

pompkins

  1. lack of vigor or impulse and ineffectiveness, as in an animal
"she knew he was wearing a pompkins"
jointpdf··on Ask HN: What’s your favorite tool for planning your day?
As someone with ADD (+burnout and friends), this is the system I came up with for myself. It is moreso aimed at task management than day planning, but they are related:

I use colored post-it notes stuck to a whiteboard. One note per task, a rough time estimate to complete it, and the color of the note denotes the urgency (e.g. red = do today). I mark it with a ! if it is overdue/festering, and a ◆ if it is a difficult task (intellectually, emotionally, energetically, or otherwise).

The whiteboard has 6 rows: health, work, life/home, finance, education, projects. As I finish tasks, I put a big checkmark on them and leave them up for a bit (as proof to myself that I did something). When enough slain tasks accumulate, I crumple them up and Kobe them into the recycling bin.

There is not much of a planning phase—it’s just a continuous process of whack-a-mole-ing my tasks and generating new ones.

jointpdf··on PayPal raises fees for most domestic transaction types to 3.49% + $0.49
What about Venmo? Or Cash App?

Venmo has been ubiquitous for years—everyone seems to have it. I’ve used it for everything from buying plants at the farmer’s market to paying rent and medical expenses.

Edit: Of course the default broadcasting of your payments to a social feed is bonkers and needs to be turned off.

jointpdf··on An overview of the theory of overparameterized machine learning
For the interested, this phenomenon is known as (deep) double descent:

https://openai.com/blog/deep-double-descent/

https://www.lesswrong.com/posts/FRv7ryoqtvSuqBxuT/understand...

(Edit: Oh, the definition appears in the abstract of the linked paper.)

jointpdf··on 17B life years could be saved if air pollution was reduced to WHO standards
Ok.

- Map of all coal power plants: https://www.carbonbrief.org/mapped-worlds-coal-power-plants

- Cumulative emissions by country: https://ourworldindata.org/contributed-most-global-co2

> the United States has emitted more CO2 than any other country to date: at around 400 billion tonnes since 1751, it is responsible for 25% of historical emissions

> this is twice more than China – the world’s second largest national contributor

This is not to downplay the serious and growing impact of China on global GHG emissions, just that casting coal as only a China problem is inaccurate and does not move us toward a solution.

jointpdf··on 17B life years could be saved if air pollution was reduced to WHO standards
Here is a map of all coal-fired power plants in the United States: https://coal.sierraclub.org/coal-plant-map
jointpdf··on Where are the robotic bricklayers?
Insulated concrete forms (ICFs) closely match what you described. They are hollow LEGOesque foam bricks that get filled with concrete.

Here is a great video (and a great channel generally) on the subject: https://youtu.be/MRipzKkeQik

jointpdf··on We Still Don’t Get Things Done
I don’t know what the real world is, but my experience as a chronic procrastinator with ADD was the polar opposite of this. I did assignments on the bus, wrote speeches during the period before I’d have to give them, etc. I’m mildly messed up from these habits now, but I did (mostly, with some spectacular failures) get away with it at the time.

If something captured my imagination, like certain writing assignments or my programming classes, then I could hyperfocus.

jointpdf··on Becoming a Chess Grandmaster
I have played a few hundred games against the various levels of Maia (https://lichess.org/@/maia1), and it has helped me improve from 1100 to 1425 blitz rating on lichess (along with playing against stronger players in the arena tournaments). It does seem to encapsulate the “average” playing style and common mistakes of the different ratings. It feels much fairer, more instructive, and more relaxing than playing against Stockfish, who will wildly blunder and then subsequently torture you.

However, even as a weak player, Maia is exploitable in a way that even novice humans are not. For example, it loves to give up obvious back-rank mates and almost never protects against it (e.g. with h3). It is easy for humans to spot if they are in danger of back-rank mate (especially if you’ve been burned before) and defend against it, so it does not happen much even at low levels. But Maia, game after game, gifts you an obvious mate in 1.

jointpdf··on Show HN: Find Your Hacker News Doppelgänger
(cosine, not cosign)
jointpdf··on Show HN: Find Your Hacker News Doppelgänger
0.849 for me
jointpdf··on I will never not talk about my depression
On the topic of destigmatization, I recommend this Robert Sapolsky lecture (on the neurobiology of depression) to everyone to understand just how physical and systemic depression is: https://youtu.be/NOAgplgTxfc.

For understanding how lifestyle changes can help treat depression, I recommend this: https://youtu.be/drv3BP0Fdi8. He contradicts the author on the point of exercise—it is one of the most potent medicines (though hard to administer to yourself when you’re depressed).

Reflecting on my own (extensive) experiences with depression and its co-conspirators, I think there are two deep fears that inhibit seeking or sticking with treatment:

1. What happens if I don’t get better? Then I’m hopeless.

2. What happens if I do get better (and it’s not enough, or I ruin my progress with a relapse)?

I don’t have a definitive answer to either, but reasonable responses include: trying and failing feels better than languishing/surrendering (not trying is the only thing that’s likely hopeless), it is (or should be) OK to make nonlinear progress in managing chronic illness (depression or otherwise), and the universe/existence is at once magnificent and meaningless so just try to relax and enjoy the ride with your fellow creatures.

jointpdf··on 21st Century Baker's Tent
Some of the most loved small manufacturers for UL backpacking gear to look into: Mountain Laurel Designs, Gossamer Gear, Tarptent, Western Mountaineering, Enlightened Equipment, ULA, Hyperlite Mountain Gear, ZPacks, McHale Packs (all custom). There are a lot more that I missed, but that should set you in the right direction.

Here are some of the most essential items for my setup (tested for ~2000 miles in various conditions, like the PCT/AT):

- HMG Windrider 3400 backpack (“just works” better than any other UL pack I have used)

- ZPacks 20F sleeping bag (hoodless is great!)

- Patagonia Houdini wind jacket (extremely versatile layer)

- Patagonia sun hoody (essential for skin protection, in my opinion)

- Uniqlo Heattech extra warm leggings (the greatest clothing item of all time) + Uniqlo down hoody jacket

- Fleece pullover hoody (almost any will do—comfort/extra warm item).

- Thermarest Neoair

- Gossamer Gear 1/8” EVA foam sleeping pad for protecting the Neoair and a zillion other uses (e.g. yoga/picnic/door mat, makeshift rain skirt)

- Tyvek groundsheet (cheap, indestructible, waterproof, becomes buttery soft over time)

- Carbon fiber trekking poles (the ones from Costco are cheap/good)

- AquaMira water treatment drops (the Sawyer squeeze filters deliver fresh filtered water, but they break/leak constantly)

- 2x 1L Smartwater bottles + a 2L Platypus bag

- MLD Patrol tarp with an inner tent or bivy (like this: http://www.nwhikers.net/forums/viewtopic.php?p=522791). That’s about 16.0 oz (incl. good stakes) for a versatile and storm-worthy(ish) double wall setup.

jointpdf··on 21st Century Baker's Tent
I would strongly advise against anyone cooking inside their tent (fire risk, animal magnet, carbon monoxide poisoning—all elaborated on here: https://sectionhiker.com/how-to-safely-cook-in-a-tent/). Tents are usually very flammable—especially the mesh bug netting, which melts almost instantly even from the indirect heat of a lighter held a few feet away.

If you have to in an emergency, then at least cook in the vestibule area (i.e. outside and away from the tent material) with lots of ventilation.

PS: I think it is essential to embark on any camping/backpacking trip with a mindset of adaptation/sacrifice. You have to be willing to make conservative or uncomfortable decisions in the name of risk management (e.g. trudging through a stream and getting your shoes wet vs. attempting a dry crossing on a precarious log, or resisting the warm noodle cravings during a rainstorm). Besides, it makes the experience of returning to civilization that much more exhilarating.

jointpdf··on US soldiers accidentally leak nuclear secrets via study apps – report
The best practice is to set them to:

  00000000
Just in case you need to use them, you know.

https://web.archive.org/web/20120511191600/http://www.cdi.or...

jointpdf··on There have been 7M-13M excess deaths worldwide during the pandemic
I think reflexively labeling every eligible but unvaccinated person as an anti-vaxxer is a mistake (not that you specifically did this here, but many are quick to shame). Many people are on-the-fence for a variety of reasons, and alienating them makes it more likely that they stay unvaccinated. Here are are two examples:

Just last night I met a guy that lives in my building—a gregarious blue-collar type guy. At one point he got kind of hushed and asked me if I had gotten the vaccine (yes) and what my experience was. He divulged he was hesitant (but “not like that”), citing concerns about possible unknowns or side effects. I just tried to convey my honest (very positive/no side effects) experience, some spare stats about vaccine protectiveness, perks (“you can go to Greece!”), and warmly encouraged him to go for it. I like to think I passed my CHA check, since he nodded his approval and said he was going to keep his appointment.

My sister and her husband (a private school teacher earning ~$40k a year in San Diego) recently lost their insurance, only have internet via the library, etc. She is not an anti-vaxxer by any stretch, but is often (understandably overwhelmed by interacting with the healthcare system. In her case, she just needed some reassurance about access/costs and some help scheduling.

Anyways, there are many others out there like them. What seems like a no-brainer to many of us can often be more complex decision/task for many everyday people. And many of them are right there...just one non-judgmental conversation or helping ha f away from being nudged in the right direction.

jointpdf··on A “perfect coronal mass ejection” could be a nightmare
I believe it is the fact that the solar system was once a spinning ball of gas and dust, and the spinning motion caused the cloud to flatten out into the protoplanetary disk. Like flattening a ball of pizza dough by spinning it in the air.

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

https://www.vanderbilt.edu/AnS/physics/astrocourses/ast201/o...

jointpdf··on Blizzard has lost almost 29% of its overall active playerbase in three years
> the old school Project 1994 servers

You mean Project 1999: https://www.project1999.com/

(LFG, by the way)

jointpdf··on I need to explain to you just how dire America's Pokémon card crisis is
Being a chronic procrastinator and lazy gift planner, a few years ago I was searching for a last-minute Christmas gift for my nephews. I retrieved my old Pokémon card collection from the closet, wrapped it up, and called it a day.

I felt mildly bad for not being more thoughtful at the time, but now it appears that I gifted them tens of thousands of dollars in value. Many of them were the rare 1st edition / shadowless versions.

Someone please tell me where to pick up my Uncle of the Year award.

jointpdf··on Garry Kasparov launches a community-first chess platform
Since the Lichess database is open, you can see the effect of both covid and QG on the number of games played. But the growth has been exponential for years. Check out the first two plots on this page (notice the log scale):

https://github.com/Paul566/chessOpeningStats

jointpdf··on The U.S. corn belt has lost a third of its topsoil
You want the Cropland Data Layer from USDA/NASS. 30m resolution, updated yearly:

- https://nassgeodata.gmu.edu/CropScape/

- https://www.nass.usda.gov/Research_and_Science/Cropland/Rele...

- https://developers.google.com/earth-engine/datasets/catalog/...

jointpdf··on The value of downvoting, or, how Hacker News gets it wrong (2009)
I think this could backfire. Toxic/trolling comments do not need to be dignified with a response, and requiring one may increase the incentive to write inflammatory posts (assuming that at least some people do this—consciously or not—to instigate reactions).

For well-intentioned posts that are factually incorrect, it seems that there are usually replies that explain the reason for the downvote. When a comment is wrongfully banished to the grey nothingness, oftentimes others step up and defend it. The community immune system functions well as is.

Also, I adore the fade-to-grey side effect of the downvotes. It’s like spritzing a cat with water for scrounging on the counters—an ultimately harmless but super effective reprimand.

jointpdf··on GPT-3 tries pickup lines
> You’re looking good today. Want snacks?

Strong move. This is like the e4 of mating openings in the animal kingdom.

jointpdf··on Milky Way, 12 years, 1250 hours of exposures and 125 x 22 degrees of sky
Earthlings that liked this link may also enjoy: https://www.astrobin.com/iotd/archive/

(massive archive of amateur astrophotography images + equipment/processing details)

jointpdf··on Mining Ethereum on M1 Mac GPU
Tired: carbon clams ingesting solar energy (tiny plants) and outputting pearls

Wired: silicon clams ingesting solar energy and outputting dogecoin

jointpdf··on The DreamBank, a collection of over 20k dream reports
Oh yes, and specifically about anxieties like you describe. It makes intuitive sense to me that your brain would simulate anxiety-inducing situations in order to exercise those high-stakes decision-making pathways (or similar). Escape sequences are very common for me.

Example: “waking” up on the last day of a semester, only to discover that I am enrolled in a required class that I never actually attended...woops.

jointpdf··on The 'GaaS or subscription service' squeeze in games
Was EverQuest (1999) the first GaaS game? The wiki says that the concept started with WoW, which is obviously wrong since EQ preceded it: https://en.m.wikipedia.org/wiki/Games_as_a_service
jointpdf··on Expanding our testing in San Francisco
For this, train the cars in DC.
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