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Sherlock

48 karma · joined November 2, 2009

Financial analyst with an interest in hacker news as defined here.

Not much insight to offer.

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Sherlock··on Elliptic Curve Cryptography: A Basic Introduction
Agree, the book "Programming Bitcoin" by Song provides a detailed explanation of the algorithm.
Sherlock··on 100-year-old former Nazi guard has gone on trial, facing charges for 3518 deaths
Disagree with prosecuting drones instead of people actually giving orders.
Sherlock··on Understanding gradient descent
This is the clearest signal to tell apart people who have studied applied math and people that haven't.
Sherlock··on Amid a demand for batteries, companies are scrambling for supplies of lithium
Fun fact: a big chunk of the lithium produced in the world is extracted from the Salar de Atacama: https://en.wikipedia.org/wiki/Salar_de_Atacama

The method is to concentrate the lithium (from <1% to 7%) via evaporation and then process this brine to produce lithium carbonate.

Sherlock··on Ask HN: Books you read in 2015?
"The Magicians", "The Magician King", "The Magician's Land" - Lev Grossman. 4/5

"Inside Job" - Connie Willis. 4/5

"Norwegian Wood (Tokio Blues)" - Haruki Murakami. 4/5

"Old Man's War" - John Scalzi. 5/5

"Persepolis" - Marjane Satrapi. 5/5

Non fiction:

"The 10,000 year explosion" about recent evolution. 3/5 ton of evidence for their thesis, but lacks predictions.

"What if" well known by HN. 5/5

"The nurture assumption" about education, 2/5. Maybe a 4/5 when it was published, but now their ideas are in the water supply.

"The man who mistook his wife for a hat", by Oliver Sacks 4/5. Several stories about neurological deficits.

Sherlock··on After 8 years and $128M raised, the clock is ticking for men's retailer Bonobos
Automating the confection of clothes is VERY challenging from an engineering point of view. We need far better robots to automate that.
Sherlock··on Rational fiction
Care to give some recommendations for a newcomer to that genre?
Sherlock··on Amazon Is Now Worth More Than Wal-Mart
Accounting doesn't work that way. You can have huge profits and reinvest them, but your income statement will show the profits in any case.

Yes, Amazon could be more profitable with different price points, but sales would take a hit, and thus their growth prospects.

FWIW, I think Amazon valuation is fair.

Sherlock··on How Fake Money Saved Brazil (2010)
The "Original Sin" of not Governments not being able to get debt in the same currency they are able to collect taxes.

So, when the main source of USD suffers in some sense (export prices, or some kind of supply shock) the Government (unable to get funds) must retort to fiscal policy to meet its commitments. And fiscal policy is the number #1 recipe to get (hyper-)inflation

Sherlock··on David Cameron Wins a Slim Majority in UK General Election
What's interesting from a game theory point of view is to have so many different parties with a FPTP electoral system.

You would expect a two party system.

Sherlock··on How Bitcoin Is Disrupting Argentina’s Economy
The Economist published an interesting report about that some months ago. The main takeaways were that (1) Argentine was rich, but lagged behind its money-peers in human development indexes such as literacy rates and (2) The elite from Argentina benefited from high food prices, so the rest of the country resented them, a brewing pot for populism.

But your point stands, monetary (or fiscal) policy was awful.

Sherlock··on Why Hispanic-Americans live longer: A mystery that has puzzled researchers
The article doesn't mention the other obvious comparisons, the non-black latin american countries, such as Argentina and Chile.

For instance, Chile ranks higher than the US here, despite being a poorer country: http://en.wikipedia.org/wiki/List_of_countries_by_life_expec...

Sherlock··on The $9B Witness: JPMorgan Chase's Worst Nightmare
When banks go down they take down the economy with them; that's what 'too big to fail' means.

It's not worth all the human suffering caused by a depression instead of a recession just to prove that the banks should be more cautious.

Sherlock··on How My Employer Put the “FML” in FMLA
In Chile the State pays for it.

The upward limit on the payment OTOH is quite low (<US$2k/month) but most employers choose to supplement the State payment with the balance of your paycheck.

Sherlock··on An Introduction to Gradient Descent and Linear Regression
That's a common (notation-induced) mistake. You just need to solve a linear system.
Sherlock··on Maximal Unviable Products
I would really like to read about the compact cassette design history. It's a really remarkable product in which you can appreciate a long list of trade-offs made by the designer(s).
Sherlock··on Google announces its first datacenter for LatAm in Chile
That's strikingly accurate.
Sherlock··on Software Inventory by Joel Spolsky
This looks about right for any kind of business, not just software development.
Sherlock··on Please don't learn to code
That's true. This should have two axes (at least). One with "domain specific knowledge" and other one with "programming expertise".

Indeed, when domain experts reach some arbitrary level of programming expertise, many good things may happen.

Sherlock··on All cellphones in Chile must be sold unlocked
This is the usual practice here in Chile, and I don't expect it to change.
Sherlock··on Apple ][ game server
Wow, my dad bought an Apple //c when I was around 4 y.o. and it was kept at home until I was ~8, but I couldn't remember seeing a cassette port. At least I'm at peace now.
Sherlock··on On (Startup) Chile
According to my experience, in Santiago the food and general bills are pricier and housing is cheaper compared with the rest of latam (Colombia, Argentina, Peru). The most expensive city here is Sao Paulo, by far.
Sherlock··on Why this investor abandoned setting up a startup fund in Chile
The problem with Argentina is doing business there. Education could be better, and the country is gorgeous, but their business practices are terrible. And the government really doesn't help.

Anyway, the problems he describes are very real here in Chile, but at least we're outgrowing that. There are big bottlenecks in the way (not enough people is english-literate and not-elite education is terrible) but the will to change is there.

Sherlock··on If Everyone Else is Such an Idiot, How Come You're Not Rich?
MS. McArdle is a journalist with strong insights in tech and finance. Her blog is a good read, if you skip the politics content, which isn't so bad either.
Sherlock··on Comcast cuts off customer for going over 250GB of legitimate use
That's standard practice for the mobile plans here in Chile. Such bandwidth for the first xxx Mb, 32kbps after that.
Sherlock··on Stop Telling Students Recursion is Hard
Wow, that's surprising, I'd love to hear about some (anecdotal) evidence supporting this.
Sherlock··on Why Some People Can Run on Little Sleep and Get So Much Done
Those are two genes that I'd love to have too, but in the reverse order.
Sherlock··on Man upgrades Windows 1.0 to Windows 7 (video)
There is a lot of people with the "if it works, don't touch it" mentality. MS would have sold a lot less if they had broke backwards compatibility.

It took me some years to internalize the benefits of "if it works, don't touch it", and I currently apply to a lot of home maintenance problems, which are outside my area of expertise.

Sherlock··on Why doesn't Microsoft understand tablets?
The article also has something factually wrong (attributed to MS): in the corporate world, the Ipad is useful for discussing documents o presentations around a table, between two or three people, when undocking a notebook takes way more than the time you need to set up an Ipad.

I also made that mistake in the begining, I had to see the Ipad in action to valuate it as the right tool for that job.

Sherlock··on Edsger W.Dijkstra - How do we tell truths that might hurt?
My first programming language was C, so I became a business analyst. Some day I will figure why they keep me here working as one.
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