Hacker News: thkim

New comment by thkim in "LK-99: Phonon bands, Localized Flat Band Magnetism, Models and Chemical Analysis"

thkim — Wed, 09 Aug 2023 05:09:12 +0000

Whether or not authors are credible, instead of the claims, is not a scientific discussion.

New comment by thkim in "LK-99: Phonon bands, Localized Flat Band Magnetism, Models and Chemical Analysis"

thkim — Wed, 09 Aug 2023 04:24:25 +0000

Since when is ad hominem a part of evaluating claims?

New comment by thkim in "LK-99: Phonon bands, Localized Flat Band Magnetism, Models and Chemical Analysis"

thkim — Wed, 09 Aug 2023 01:09:02 +0000

I did not say I consider private research in some sort of higher level than public research. I only said they have no incentive to do full disclosure right now. Without knowing exactly what they know, it is insulting to authors to describe, or even hint, them as avoiding to accept failture. It is simply unwarranted ad-hominem and not contributing anything to academic discussion at this point.

New comment by thkim in "LK-99: Phonon bands, Localized Flat Band Magnetism, Models and Chemical Analysis"

thkim — Wed, 09 Aug 2023 00:32:30 +0000

Original authors have been working on it for 23 years since they first found the material in 1999. They are part of private institution and have no incentive to rush the disclosure so that other labs can catch on their life's work. Authors already have stated they will publish more information next year. It's pretty arrogant to draw premature conclusions on quick analysis and demand the authors to disclose more information right now, when they are clearly not obligated to anything.

New comment by thkim in "Algorithmic Trading: A Practitioner’s Guide"

thkim — Mon, 13 Feb 2023 01:28:20 +0000

Algo trading != HFT. HFT is a type of algorithmic trading strategies, categorized by trading interval. In the same categorization there are mid-freq strategies as well. The term "high frequency" is rather subjective, it depends on what alpha you're targeting after.

New comment by thkim in "Tether Withdrawals Top $10B"

thkim — Tue, 24 May 2022 06:41:54 +0000

OK so Tether went from 83bn to 73bn... what's the big deal? It's not like LUNA.

New comment by thkim in "Tether starting to lose its peg too, after Terra did"

thkim — Thu, 12 May 2022 09:00:04 +0000

I think Tether can get away with less than 100% collateralization. At the current market cap of 82bn, even if they are only 20% collateralized, it takes 16.4bn one way movement to deplete their reserve. Is that likely event? Guess it depends, but I think market makers would be more willing to backstop them than UST shitshow. UST has "death spiral" structure that makes MMs less willing to backstop them once it goes on a path, which is exactly what hedge funds attacked against these past few days.

New comment by thkim in "Day trader army loses all the money it made in meme-stock era"

thkim — Mon, 09 May 2022 23:38:05 +0000

Which part of it is "stupid" ? Please have some respect.

New comment by thkim in "My Experience as a SWE Intern at Goldman Sachs"

thkim — Sat, 08 Jan 2022 16:46:20 +0000

From my experience, this is true, but reward is not why such behavior becomes culture. Culture is ingrained by leaders who act and lead according to value organization adheres to. The key here is to have leaders at every level who embodies such value. Having such values baked into performance evaluation is how "reward" plays a role in engendering and sustaining such culture. It is about whom does the organization promotes and chooses to be a leader. It's not about simple salary increase or cash rewards, as such things don't last more than a few months.

New comment by thkim in "Have you considered hiring a head of growth?"

thkim — Sat, 13 Nov 2021 12:16:08 +0000

I sense negative images on the term "growth". Yes, "growth" often employs methods that are borderline scam. It's exactly what they are hired to do: enlarge and fix funnel at all stages. There's nothing inherently wrong with what "growth" team does. Think of them as aggressive salespeople - as long as product team delivers, you will see fundamental business growth. If you product team can't keep up, well, that's not sustainable.

New comment by thkim in "White House Launches US Digital Corps"

thkim — Tue, 31 Aug 2021 06:35:41 +0000

A society where quickest decisions are made would be either 1) dictatorship or 2) non-human, i.e. AI based. Would that be a good society to live in, I can't tell for sure. I can say for sure that democracy is designed to be slow and inefficient with regards to decision making. We humans need time to understand, think and argue. We have slow decision making system so that we may reduce chance of error. I think "fast and efficient" are wrong benchmarks.

New comment by thkim in "Why Computing Students Should Contribute to Open Source Software Projects"

thkim — Mon, 28 Jun 2021 13:14:31 +0000

I don't agree with this argument. Open source contribution is a fine art. Half-baked pull request is a nightmare for already-strained code reviewers. It does not help open source community as a whole.

New comment by thkim in "Daisugi, the 600-year-old Japanese technique of growing trees out of other trees"

thkim — Thu, 29 Apr 2021 04:51:59 +0000

It's not politically correct nor polite to say this, but Japan's problem is their education and cultural system ingrains subservience to the point that Japanese people are subservient even to injustice. It's not just inefficiency Japanese people put up with, they don't do anything about corrupt and ridiculous politicians having their way through generations. They call it a tradition, but they are just afraid of speaking out because of peer pressure. It's like a mafia system. I know that I sound very broad and generalizing, but those who have lived in Japan for long enough would probably agree with this.

New comment by thkim in "Nassim Taleb: Bitcoin failed as a currency and became a speculative ponzi scheme"

thkim — Sat, 17 Apr 2021 16:47:02 +0000

Intrinsic value has nothing to do with cost of transaction.

New comment by thkim in "Nassim Taleb: Bitcoin failed as a currency and became a speculative ponzi scheme"

thkim — Sat, 17 Apr 2021 14:19:48 +0000

An investment asset must have a cash flow and/or intrinsic value. Otherwise you do not have a way to recuperate your money, so it is not an investment. They also provide basis for value of the asset. Bitcoin has neither. That is why Bitcoin is a Ponzi scheme regardless of all the rosy pictures the believers try to paint. This is very important: Bitcoin has neither cash flow nor intrinsic value. The only way to recuperate money from Bitcoin is for another person to pay for it - the very definition of a Ponzi scheme. Gold does not have a cash flow, but it has an intrinsic value.

New comment by thkim in "German laptop retailer fined $12.7M under GDPR for employee surveillance"

thkim — Tue, 19 Jan 2021 02:14:50 +0000

I'm not sure what you mean by "employer can prevent employees from taping them." Do you mean you assume management corner offices are not taped? That's a problem with corporate culture, not video surveillance.

I still don't see a problem with video surveillance, with full disclosure and proper access controls. What difference is there with police getting a warrant to search your house?

New comment by thkim in "German laptop retailer fined $12.7M under GDPR for employee surveillance"

thkim — Mon, 18 Jan 2021 02:37:31 +0000

Why is video surveillance a problem? It seems to be most efficient at protecting employees from being falsely accused & spares from witch hunting. It also helps prevent crime for society. If privacy is the concern, then regulation should be about proper viewing rights and storage control, not shooting down surveillance entirely.

New comment by thkim in "25 Years of PHP"

thkim — Wed, 10 Jun 2020 15:52:35 +0000

Nothing "wrong" with PHP itself, but it's clearly not designed for modern web programming patterns which makes it feel outdated. No separation of model-view-controller, not friendly for API or AJAX, no class structure until later add-on, and so on.

New comment by thkim in "CDC considering recommending general public wear face coverings in public"

thkim — Tue, 31 Mar 2020 03:58:31 +0000

https://www.kingsing.com/product/561-en.html?gclid=EAIaIQobC...

New comment by thkim in "CDC considering recommending general public wear face coverings in public"

thkim — Tue, 31 Mar 2020 03:36:44 +0000

It looks like a typical machine can manufacture a mask 50~100 per minute. For 40 hour work week that is 200k masks per week. So technically we only need 5000 of these machines to produce 1bn a week.