skysight-inc/HackerNews huggingface dataset:
> Actually I thought it is the other way round: A frequency is defined as a sine basically, it has an * amplitude * frequency * phase shift

But this is also true of any periodic wave. The beginner question is, why don't we use triangle waves of square waves? Those also have amplitude, frequency and phase. Frequency just means the reciprocal of the period.

To which my answer is that the magical property of complex exponential functions is that they can be shifted by constant (pointwise) multiplication. Which is a really non-obvious fact at first but is crucial in the machinery.

The complex exponentials constitute an orthogonal basis which diagonalizes the convolution.
Borrowed the data from one of the illustrations on that site and dropped it into a vertex shader

https://www.vertexshaderart.com/art/XwLcGCStsrbhX6jFY
I understand why, those of us without anyone to emulate professionally have a tough path with pitfalls and charlatans in every direction.
Essentially none of what you said contradicts any point I've made. I am not a USSR utopian. Very much the opposite: it had very serious problems. The issue is the comparative nature, where capitalists pick and choose what counts as explanatory failure, typically ignoring things like constant aggressive wars and funding, e.g., the Stasi. There is also the matter of the means by which capitalist countries maintain themselves, as it is very, very far from a circular or sustainable system, but one that has depended very heavily on expropriation and military dominance. The position I'm presenting is not, "communism was fantastic, ideal, perfect, without core problems". It is, "communism well for a very long time despite incredible external aggression and vastly improved the lot of people who would otherwise have been put through an economic meat grinder". It is an indictment of the primary alternative economic system that bureaucratic central planning could work so decently in comparison.

When looking at explanations for failure, only the most proximal analyses are given credence in pop culture (The Schuerer report was days before the fall of the DDR) and no holistic analysis is considered. To be scientific and historical about this, one must consider the alternative hypotheses, the greater picture and burdens. Let's consider one simple one: the extractive nature of western imperial economics - transferring wealth from the global south to itself. To what extent can you reject the hypothesis that a significant explanatory factor in the economic success of West Germany is the disproportionate value received from these exploitative relationships? Is it considered in the analyses and conclusions drawn? If not, why not? It seems like a very relevant question to me - there are countless examples of capitalist countries with far, far, far worse outcomes than communist ones, and they tend to be in the Global South.
A local appliance dealer who I have come to know on a personal level turned me on to the LG and special-ordered it for me. I had originally asked him about Panasonic inverter microwaves but he dissuaded me saying that the Panasonic ovens suffered from reliability problems.

The inverter cooking is fantastic and makes the oven a lot more useful for serious cooking. I will use 20-40% power for re-heating foods over a longer time and the results are that there are none of the weird molten-hot and still-cold pockets of food. Pre-packaged foods whose directions are, say, "heat for 3 minutes," I will instead heat for 5-6 minutes at 40-50% power and the results are considerably more consistent. Plus, I have found that I can get sous vide-like results at low and long settings. For example, I have discovered that heating a filet mignon cut gently at 10-20%, and periodically halting cooking for a minute to let heat distribute evenly through the cut, and then continuing slowly until it temps at 115°F, and then searing on rocket-hot cast iron produces great results. Better than sous vide, at least for beef tenderloin.

I know I will never go with a non-inverter microwave again as it turns a blunt instrument into a device capable of truly nuanced cooking. If something is going to tie-up counter space, it had better be worth it and the LG is worth it.

The next thing I am looking at is the Anova Precision Combi-Oven. https://anovaculinary.com/anova-precision-oven/
SARS-CoV-2 Transmission among Marine Recruits during Quarantine (full paper)
His argument is that retailers are intercepting “the phone they bought” and preloading garbage on it and repackaging it before sending it to them. Maybe that’s something that happens a lot in China? If so, requiring registering on the Xiaomi website would be a pretty good way to thwart this.

In a way, it’s to protect naive users. And it still allows you to root the phone - go through this idiocy once and then never worry about it again.
Google made plans to target the EU official in charge of digital policy updates
Not my native country but Tuareg Rock is my new favorite forgotten world genre.

A a great example -

‘Long Live The Sahrawi Army’ by El Wali

https://m.youtube.com/watch?v=_hoWwf1Sibg

Link to a good wiki on the genre -

https://en.m.wikipedia.org/wiki/Desert_blues
They were right.

The 90th percentile earner from the Harvard class of 2010 didn’t come from some random high school in Missouri with an 1000 median SAT score.

Guidance counselors suck every where. Mine was a national guard major, 18% of my class joined the military.
Are you implying that enough people can't be trusted not to shoot at police with their guns that it justifies an armed response to every call everywhere in the entire country?
> This seems so negligent it's difficult for me to believe this was a mistake.

I mean, it is the result of deliberate architecture and design changes to security and networking on macOS.
Given the history such paranoia might be reasonable(healthy too), but I can't assert such incompetence with a straight face.
Sine (or cosine) is just the projection of uniform circular motion onto a line segment.

Why we break arbitrary periodic functions into a sum of sines and cosines (or circular motion of different integer frequencies) is because uniform circular motion is very well understood and studied, so we have many tools for working with it. It’s very easy and convenient to isolate particular terms, and each term has a pretty simple shape, and is infinitely differentiable. These bases are conveniently orthogonal relative to a uniform weight.
I have a 2010 Mini still running High Sierra (10.13) and it's getting patches.
Consider that are dealing with a bias metric. California's weather makes it the least energy intensive state. In 1975 about 50% of the homes in my state had air-conditioning. Now its about 95%. Similar story with heating modern systems. Even in the 70s, older generations dealt with a much colder home in the winter than most people would normally allow today. The days that require climate control in my state are something like 2-3x the average number of days in California and at a much higher intensity.

Additionally, California has exported much of it's energy use to other states and countries.
> I just want hot water. Give me hot water.

I always forget that Americans heat water in the microwave instead of an electric kettle.
Exactly. Thank you. :-)
The pandemic doesn't really affect me. I social distance my whole life so this is a pretty natural time for me. I'm happier in the sense that I can work remote now and live in an area I like more. I get to do activities I always dreamed about every day now.

However, when things are generally going pretty well, it highlights how mundane life and especially work can be.
Only if their 15 seconds of depression are related to negative stimuli.
I was a mediocre student in a decent university and I basically chose my course because bunch of older seniors we looked up to suggested that the course had good job "prospects". The only thing I discovered from that course is that I loved writing code in Fortran while doing one of the electives (I actually wrote it on paper in my exam because we didn't have access to computers). I call that my the most lucky and important break.

I never worked on anything related to what I mainly studied and am thankfully programming now (not in Fortran though) and know that this is what I wanted all along.
This pricing is actually not that far-fetched. Consider that the competitor UptimeRobot offer 50 monitors at 5 minutes interval for free.

You can lease servers very cheaply nowadays, uptime monitoring is not resource-intensive and is an easily distributed workload. The most expensive part of the operation is likely to store the monitor results in a database.
And the world hasn’t ended. Stop fearmongering.
She doesn't reply to any of my emails or Slack messages :-)
maybe not at all? maybe it could be better off? hmmmm
> I assumed there were too many revoked certificates for something like this to be viable, but I'm not surprised it is.

Given that Apple currently doesn't even encrypt the requests during transit, I think they just didn't pay much attention to the problem, which I think the main reason is why they haven't adopted it yet. As for the number of revoked certificates, I'm not sure it's larger than the number of revoked TLS certificates, given that there are way more websites out there than there are registered apple developers.
Ask HN: Photogrammatry Software
A few months ago there were two projects that I've not been able to find for the life of me - one from google, one elsewhere, that built a 3d model from a camera/phone of say, a room or house.

I'm now trying to find any software - app, applications etc that I could use, preferably opensource, that takes video/images of a room/house and builds a 3d model of the layout.

Eg:

1) Take 1000(?) photos or a video of home
2) upload photos into software
3) Magic ensues and we have a 3d model

or:

1) Take live video and as you video , a model builds on the PC/Phone
How would a better implementation of this work? They definitely need to store your username somewhere to prevent the same user from voting multiple times.

I imagine they could simply keep track of whether you voted or not, and not which specific choice you made. That way your choice remains private but we would not be able to show even you which choice you made.

I’m sure Reddit tracks each upvote and downvote individually and doesn’t just increment a score counter somewhere.
Meanwhile there are android games I bought like 3 years ago that don't run anymore.
That's usually a yes, or at least "keep watch". There's grades of it, things like cyclothymia and disthymia, too.
I think it's that exponentials simultaneously diagonalize time shifts, derivatives, and integrals. Convolution follows from these -- though there's something to be said for putting convolution above derivatives and integrals in importance.

(A deeper thing going on is that a periodic function can be thought of as a function whose domain is a circle. Circles have obvious rotational symmetry, and when you have symmetry you can use representation theory to decompose things into an (orthogonal) basis. In this case, rotations commute with each other so by some theory the decomposition is going to be entirely through eigenvectors of rotation, which happen to precisely be the exponential functions e^(n theta i) for n an integer. This decomposition is also an isomorphism that carries convolutions to point-wise products in both directions. Also: if you make it so the circle is the complex unit circle, a Fourier transform is the idea that you can create a Laurent polynomial that extends the function to the complex plane minus the origin.)
Many unsavory characters invested in Twitter and Facebook too.
> the pretty absurd deference the US population has for its military is harmful

I'm still going to have some respect for the people who rush to stand between me and the bullets aimed at me. The local Starbucks, for example, has a sign that says free coffee for military personnel. A relative who used to run a coffee shop also always offered free coffee to military people. It's a small thing, but important.

It's not about glorifying the military, but about acknowledging the risks they take on our behalf.
> aspirational to have a built-in microwave-oven now

The funny thing is, a lot of built-in microwaves aren't really built-in. They're just countertop models that sit in a cupboard with a predictable opening size, and it comes with a trim kit to make it built-in. You can totally just buy it without the trim kit and set it on the counter.
I don't felt the need to see a doctor about what I'm experiencing, so I'm not sure if what I have qualifies as depression. But over the past several months, it feels like my entire personality and being is a rug that has been pulled out from underneath me. I'm no longer the driven and interested person that I used to be. I struggle to sit down and work - my brain feels scattered and no matter how much I sleep and rest, I feel so tired that my body literally aches. The only thing I really feel is a subtle sadness, like a background hum that feels like it's dragging me down. It also feels like it's never going to go away.

So is that depression? I have no idea, but I hate the feeling and I pray that once this pandemic is over, the symptoms will fade.
Python actually has ';', and I think you can write everything in one line if you really want to, e.g. in an inline script

python3 -c 'import math; tau=math.pi*2; r=1; u=r*tau; s=r*r*tau/2; v=r*r*r*tau*2/3; print(u,s,v)'
It's all about justifications for being egotistical assholes and believing feelings are enough justification for policy. You can't reason with people who dismiss facts, empathy and consequences. You can reach the middle ground on issues that affect livelihoods of people and try to map where this may be improved.
Only if you use far too much power x time.
> But I guess there was some gap where this wasn't a given any more...

Very much so. First computer has MS-DOS 5. Which boots and gives a blinking cursor to 'do something' with. This often entailed editing mem.sys and various .bat files to get a game working. Or the abstraction that was Word Perfect that was not WYSIWYG that content and layout are separate concepts, and yes, magazines usually had 10-50 pages of BASIC stuff to do 'cool stuff' with.

From my observation, the change happened with Windows. Not was was a GUI, things apart from batsock mainly 'just worked' (except when they didn't) and it was no longer necessary to be required to peer into the (albeit high level) bones of a computer.

And this was true before DOS, C64, Spectrum also offered somewhat hands-on experiences.

But... perhaps not so obviously in Windows-land, if I were giving a kid a computer I'd make sure it was Linux as the command line's not far away, and encourage use of it to get an implicit understanding of what's happening - again a somewhat higher level understanding than creating a RISC-V chip, but more-so than 'right click on the desktop to change wallpaper' - use mkdir to create a directory, understand repositories and how everything's a human-readable text file. Basic stuff with GNU tools, then a little scripting, perhaps some Python.
He had many billionaire donors and its well documented that GOP voters are wealthier on average, this is a list of just the well-known billionaires that backed his 2016 run: https://fortune.com/2016/08/03/trump-billionaire-backers-lis...
> Our perspective is that fascists are not capitalists because they seek to manage the economy through central planning.

An incorrect perspective. Fascism is sacrificing one set of the ownership class for another, diverting populism directed against a hostile liberal economic system to only part of that class while giving more power to the rest of it. Fascism is characterized by privatization, not central planning, with a subset of the bourgeoisie gaining vast new powers in comparison. You could even ask Mussolini himself about this in his comments about how fascism should more correctly be called corporatism - and see his transition from opportunistic socialist to opportunistic fascist serving key bourgeois individuals and their interests.

> The rest of this argument is not likely to be fruitful unless you can critically examine your notions surrounding property and violence.

I can critically examine them and always have been able to. Should I interpret this to actually mean, "until you change your opinions on them"? I figured there would be an accompanying pushback about them, but I don't see one.

> Theres also a healthy amount of revisionist historical thinking that seeks to whitewash the terrible conditions created by communist countries.

Again, this seems to just be, "I disagree". A fruitful conversation would be one where we can have a discussion and real exchange, not vague dismissiveness.

> I'm not interested in debating matters of fact here so thank you for your replies and your perspective.

Historical and economic analyses are rarely simple matters of fact and this is a subject where dealing with other perspectives is a necessity. None of what we're discussing is at the level of simple facts, they are interpretations depending on a large set of suppositions and historical knowledge.

But I welcome a discussion.
Twitch streamers report DMCA takedowns for in-game sound effects
> kids too poor to really take the time

If there's one thing poor kids have, it's free time. I think it's actually relatively easy for a smart poor kid in the US to learn ~whatever they want; that was certainly my experience, and I think the structures that were available to me are available to basically any American kid today.

One thing to keep in mind is that poverty is strongly anticorrelated with intelligence - this is not PC, but the evidence is overwhelmingly clear - so it's easy to see that there aren't many poor kids doing stuff like this and (mistakenly) conclude that it's because they don't have the extrinsic opportunity, rather than that they lack the intrinsic means.
The author is a security specialist

In other words, an authoritarian corporate shill, just like the vast majority of others in the "security industry" whom I've had the displeasure of meeting.
I think my anecdotal experience with getting casual users to switch to Element might be helpful to you:

I am a member of a social group that varies widly in age and technical experience. When I tried switching two of our members over to Element, I noticed them quickly growing upset with the app because the found it to be missing key features they expected like easily recording audio messages or the visual seperation of messages that are more than a few minutes apart.

From my personal experience with switching people from one chat app to another, people expect a replacement app to:

1. have 1:1 feature parity with the app it's replacing,
2. display all the information they've grown to rely upon,
3. and both feel and work like the app it's replacing. (even cosmetic things like text bubbles and larger font sizes)

Failing the first two points lead to the immediate dismissal of the app. Failing the last point is seen as a deficiency in the new app. Inversely, succeeding in all three leads to smooth adoption. It is why all my group is using telegram right now instead of whatsapp.

I'll have another go at switching my group to Element when/if the app gains the ability to send audio messages, but without Element looking and feeling similar its compition, I'm skeptical of my chances to succeed.

By the way, I really like Matrix and appreciate the hard work and care you're putting into this project. Thank you and keep up the good work.
Windows may be better but any of us born before the 90s may still have PTSD from all the pain of troubleshooting malware infestations. 17 years ago I was the primary developer of a commercial Java web app and wanted nothing to do with support phone calls but on many I had to walk our web app users through the installation of Spybot Search & Destroy just so they could get rid of something interfering with their usage of our product!

I was traumatized a few weeks ago when my parents sent me a particularly jarring video of their Windows computer with audio playing telling them to call a number to get rid of something nefarious-sounding but quickly Googled it and realized it was a bunch of popup browser pop ups pretending to be worse than they were. I don’t run into stuff like that when using Firefox on my MacBook.
this is not Reddit
I feel a constant sense of inadequacy and that I haven't achieved enough, but it doesn't really get me down or stop me from enjoying things. It's just background noise that sometimes flares up in intensity, like when I feel like I should have known something or I failed at a task. That isn't fun. I work to address this by constant self-improvement and making and achieving reasonably attainable goals. That helps.

I guess I also worry about the health of the relationships I have with important people in my life and what I'm doing to maintain them.

I don't think any of these things qualify as depression though. It just feels like to me that's what life is.
Neither had the underlying single enormous vertically integrated market slice.

Apple has and had the iPhone. Apple started using their own chips, the A5, about 10 years ago. (In 2011 March, starting with the iPad 2. And they used ARM before that too.) And since then Apple optimized the "supply chain", incremental steps, but when you are Apple every step can be almost revolutionary (and year after year Steve told exactly that to the believers, and it's basically true, just not on actual feature front, but on hardware and systems level - eg. Gorilla glass for the phones, power efficiency, the oversized battery for the MBP, milling, machining, marketing, design, and so on).
> I have noticed that using a 2000lumens projector daily, instead a normal TV has made a huge improvement in my mood, and almost eliminated that SAD feeling you get in November.

This is brilliant (pun intended!) Also a good way to mess with circadian rhythms if used after 6pm-ish (unless you use f.lux)
Thanks for this. After the whole phone home saga of this week I think this is now down the bottom of my list of concerns.
That's the same thing
> it's not true that it's impossible to run a relatively reliable email service

Good thing I didn't say that then.

Running your own email service isn't hard, even with setting up DKIM and anti-spam and so on, though it is time consuming. It is much harder to make sure people will receive your mail and it not be in their junk mail. I'm still seeing lots of email to mailing lists, with impeccable message content, ending up in spam based on mail server reputation or content similarity metrics. If you're running an organisation that can be very costly. If only a fraction of your recipients mark you as spam you'll get lots of misses.

Handcrafting your own internet stack is very libertarian, but it doesn't scale to anyone without access to deep tech expertise. Even governments decide they can't run mail any more. And I would argue that this isn't something you can fix about email. The problem is that the next system isn't federated at all -- it's balkanised and monetized: WhatsApp/Messenger, iMessage, Duo, Telegram, etc etc.
I'm sure these are bad for the environment but at least in Japan (and Taiwan?) pretty much every household has a water boiler. They do have buttons but in general you turn them on, they keep the water at 90, 95, or 98c.

https://www.amazon.com/s?k=zojirushi+water+boiler&crid=32LNK...
These numbers are easy to find, but sure, let's break out our calculators. By recent generic numbers, Jane street does $171MM revenues across 900 employees. Apple has $274B revenues across 137,000 heads.

$190,000 vs. $2,000,000. Netflix is even higher: $2.4MM. What numbers do you have?