quantumofalpha

Typical red LEDs used for displays have a peak emission somewhere in 600-650nm range, but it's bell curvish so yeah you can expect a small amount of 670nm light out of it.

Does getting exact 670nm light matter? It's just the wavelength that this particular study investigated. They do not offer conclusions for other wavelengths as they did not test them, it's as simple as that. But a lot of other researchers did, especially in red/infrared part of the spectrum and generally with positive results - http://bitly.com/PBM-database. So I would guess you should be able to get some of the described effect at nearby wavelengths as well. 670nm seems to be near an absorption peak of cytochrome c oxidase, a molecule believed to be involved in the mechanism of light therapy action, which is why I suppose it appears frequently in research.

Have a look at http://bitly.com/PBM-database - if there's one it's probably listed there

It's sign that your VPN works:) Unfortunately that's the price to pay for anonymity today. Go to another website? DDG instead of google.

GPUs are too slow for HFT trading, yes. Deep neural networks in general do work in this domain, people do use them, but the stuff that you can profitably deploy into production is not going to be your vanilla garden variety neural networks, there's a lot of extra engineering required to make it fast enough.

Really depends on time horizon you're talking about. They actually work pretty well for HFT, there's plenty of data around, and most of the information is just in market data - no nasty low frequency stuff to deal with like news, earnings, alternative data, insider trading, butterflies flapping wings in china etc. But the problem is by the time your GPU spits out a datapoint somebody else can go in and trade a few thousand times in the meantime. State of the art on the most heavy competed exchanges is that your fpga (or even asic) with a fiber connected directly to the exchange needs to start sending ethernet/ip headers even before it made up its mind what it wants to send in the payload.

At lower frequencies when the data gets thin and noise/overfitting is a major problem, yeah it makes sense to use simpler models. Bias/variance tradeoff in action.

Why not both? Linear models for absolute lowest tick-to-trade latency doesn't preclude you from using fancier stuff at earlier modelling steps. Final linear models you ship to fpga can be mere distillations/triggers

Amazon is worst payer among them in the US as well. Facebook and Google pay decent money in London and Zurich, almost on par with US in the latter, London is maybe ~30% less.

> How much are you left with now, ~1% of the total tech jobs?

If you want top 1% pay, you gonna have to hunt for top 1% jobs, seems obvious, no?

The author is spot on. You just happened to be working for the scrappiest/shittiest faang that's all. Shop around, there is decent money to be made in Europe - but of course it's not as easy to walk into it as in the US today. Oh and don't forget that it's TC that matters in big public tech, not salary.

> The main issue is that there is just nowhere near enough housing to keep up with population increases, seemingly anywhere in the Western world.

With falling fertility rates, natural population growth in the west is about zero today. If not even (going to be) negative.

Exactly. If you're in tech, you should be shooting first of all for $500k TC today than $500k pnl, the former is way easier (luck aspect aside). No point in thinking about active investing until you have like 7 figures of own capital to manage.

Put spare money every now and then into VOO or VT or similar and forget. No knowledge needed and time investment is like a few minutes of your time a month/quarter/year. Squeezing more alpha than that and not losing it, properly done (i.e. not gambling), is at least a part-time job. Chances are you'll do better putting that time into your own career.

wat? Google used clicks ("navboost") since approximately forever, it's one of strongest signals for all major web search engines. I guess the better question is why they don't optimize ranking directly on clicks, why still bother with all that expensive human raters business... well optimizing for clicks helps but only until a certain point beyond which it starts hurting relevancy by overpromoting old popular results and clickbait. But as an ingredient in overall ranking in one way or another they and everyone else definitely use click data.

Steadily losing 0.5-1kg/month just by cutting out carbs and sugar. Not really full keto (which requires like 70-80%+ calories from fat to maintain ketosis), just paying attention to nutrition facts, stopped buying high carb food, started cooking more with quality ingredients I control, otherwise eat whatever and however much I want.

The biggest change by far was cutting out cow milk which is actually very caloric and sugary. I easily drink 1l+ carton a day and that's 500+ cals alone! Human metabolism is pretty high but that's just too much calories to consume every day and that you can hardly feel. Found a good substitute - almond milk, especially Blue Diamond and Alpro brands - they cream coffee and taste in it just like regular milk with only a fraction of calories and no carbs. Another good sub I grew to love is grated/mashed cauliflower instead of rice and potatoes.

Not flaky at all. 10M+ LOC monorepo with a few hundred devs here. All it takes is a fast build system. Full clean rebuild for me is a few minutes tops (distributed on a shared cluster), incremental is O(seconds) - mostly linker. Precommit checks and code review system both warn if a build is failing, so there's no reason ever but sloppiness to check in broken code. Full test suite on other hand takes hours to finish and so gets broken half the time - the longer the feedback loop the more likely the thing is broken.

> meaning I would need sponsorship for an H-1b work visa

There's your problem. H1B is just such a difficult and lengthy process today. Even for experienced candidates - I have a decade yoe at faangs, still couldn't crack it recently. And in your position, without experience and a degree, yes you're just wasting time.

You have to apply for H1B in March for a sub-30% chance (it's a heavily oversubscribed lottery) that you might get to start in October. Few companies are willing to go through it to import brand new overseas talent. Most just sponsor people already having permission to work somehow (H1B transfer from another co, F1 OPT, L1, through spouse etc) to retain them in the states.

Some alternatives of what you could do:

  * Go study in europe on the cheap. An undergrad degree is not a must for programmers, but still a very important piece of paper that you need to open doors later in your career. It's actually even a requirement for H1B: degree or 12+ yoe.
  * Go for masters afterwards in the US, not cheap but you can stay work for 3 years on STEM OPT and no lottery involved as with H1B.
  * Work for at least a year for an american company in europe, then you can transfer to the states on L1, lottery free.
  * Go to Canada, they can issue you a passport in 3 years with which you can come work in the states on TN visa, also lottery free.
  * Find second half with the right type of passport / visa that allows you to work in the states...

> So one option is to move to one of the outsourcing companies or even better to a smaller company dealing with western clients.

That's pretty much what most (if not almost all) of ukrainian tech is doing. And coupled with low CoL and widely abused tax loopholes, they are making bank, netting comparable money to 6 figure jobs in the west. So I'm just saying that eastern europe == poorly paid is a misconception.

You are grossly underpaid, even for eastern europe. Guys just across the border (or two) from you make 2x+ more, while paying next to nothing in taxes (5% I've heard, as faux contractors) and enjoying some of lowest CoL in europe - https://jobs.dou.ua/salaries/dynamics/

Money can buy you financial freedom, more holidays than you'd know what to do with, good place to live almost anywhere in the world, trust fund for your heirs and all that other stuff you mention. Good money - the kind you can reasonably fast and predictably accumulate in California today, say ~decade at FAANG, but have near 0% shot at reaching in Europe. To me being able to retire in 30s and have a lifetime to yourself, own pursuits and family is much more enticing than a lifetime of neverending 9 to 5 grind no matter how chill it is and how much parental leave they give (it can't beat ∞). But indeed generally Europe is a better place for the less successful/lucky. Not everyone is ambitious and lucky enough to make it in the US, especially outside tech. Good thing capital is mobile, you/your kids don't have to stay in the US forever once you've reached your target.

Still pretty useful in high noise/signal regime. Though at my last two gigs in this area they were kind of obsoleted in favor of generalized additive models which are more interpretable, robust and have more powerful fitters e.g. modern boosted (xgboost/lightgbm/whatever), bagged, depth 1-2 tree ensembles then basically fit curves to scatterplots.

More generally in industry the bottleneck is usually data, not models.

Kind of, I've seen some non-public Intel SKUs in the fleet but afaik they just had tweaked core counts and clocks for better perf/watt. They were also exploring non-intel architectures at some point, ppc especially but no significant prod deployment yet. And then I'm sure you've heard of special purpose hardware like TPUs

Yes, you can explicitly set up additional aliases that will bounce incoming mail (or redirect it). It's an option in "New Alias" screen - "Reject (bounce) all mail sent to this address (disable the alias)". While everything else not explicitly configured would get caught by the wildcard alias and delivered to the inbox you specified for it.

What's the benefit of running own server in this case? Wildcard aliases is actually a standard fastmail feature, I use it a lot. No per-email setup needed whatsoever, I just give out <whatever>@mydomain.com, they all will reach my inbox. Haven't seen people sending spam to random aliases at my domain yet.

Last time I job hunted right before covid, this was a thing back then too. All the usual suspects (faangs & hot pre-ipos) said no and could only offer me Canada/UK and a transfer on L1 after a year (meaning I get stuck and underpaid with the companies for years). Today's H1B process is too much for most companies: 1-1.5 year wait time with <30% chance you'd get picked up in the lottery. So for now most are only open to sponsoring people already in the US and able to work somehow. Things might change when/if wage levels rules get implemented for H1B.

A couple firms hinted they could pull me through O1/EB2/3 but it seems like i didn't clear the interviews and in the meantime landed a US-sized offer in UK - London's finance can pay competitively if they want you.

For Google specifically you may want to consider their Zurich office - they pay on par with US and no visa needed for EU citizens. In a year you can transfer to US.

Discovered almond milk. I need about a liter of the stuff a day in tea/coffee and with cow milk that's a ton of extra calories and carbs. Almond milk tastes about just as good with a fraction of cals and zero carbs - good for keto/low carb diet. Finally got the needle on my scale to steadily move down.

> the equivalent of those $20K is a massive improvement for me

$20k raise is peanuts in US tech. If you're in it to chase the greenback, suck it up, transfer to US on L1 asap, get green card in 2-3y, get $100-200k raise on your first job hop after it.

Sounds normal. I had experience with Google - they would categorically refuse to uplevel on transfers (except maybe across ladders e.g. PM<->SWE) and reneg on pay (mostly 'cause you have zero leverage in this position). They have paybands per location/level to stick to, most other tech companies too. Exceptions possible but you'd have to make your case reach someone VP level who has the power to override the prevailing policy. Low level managers don't.

> What to do if your FAANG is levelling you according to your nationality?

Your nationality has absolutely nothing to do with it. If you're not happy with your level, earn a promo or leave for some other company willing to uplevel you on hire.

Right, Google actually has a 'no jerks' policy and values being a good team player more than pure technical brilliance. Being a good engineer gets you L4 (mid) or low L5 level at Google. Growing beyond that is mostly about soft skills and influencing other people - that's not compatible with being a dick. It probably wasn't the case for him in 2015 yet, but these days google has a mandatory 'googleyness' behavioral round that the guy would fail hard with that attitude even if he could invert the proverbial binary tree.

Exactly. Click = upvote. Returning to SERP after a short dwell time = downvote. It's noisy but because you can mine such things implicitly by just logging user's behavior, the volume of data is way bigger than what an explicit feedback system can provide.

Whereas OPT not being lottery-based is 100%, no? And more importantly, you can pretty much go work wherever you want with it, every tech firm is ok with it, but relatively few bother with H1B today for overseas candidates.

YOLOv3 is a pretty delightful read https://pjreddie.com/media/files/papers/YOLOv3.pdf