skysight-inc/HackerNews huggingface dataset:
No, not at all.

The technical difference is how the overall thrust is steered:

* Quadcopter: the speed of four (fixed pitch[1]) propellers is managed independently. Spinning a single propeller a bit more tilts the copter away from that propeller[2]. This is very unstable, so speed needs to be adjusted at kHz rates[3][4].

* "Electric rocket": the thrust of the single propeller is steered using the control surfaces at the bottom to deflect the thrust. This is called thrust vectoring. Since the propeller is not directly used to steer, the speed doesn't have to be adjusted that often. However, the position of the control surfaces does.

* Helicopter: tilts the rotor plane[5] to tilt the aircraft, and inclines the individual rotors to change the magnitude of thrust. The rotor speed typically remains constant.[6] Helicopters are aerodynamically stable and don't require an automatic control loop [edit: no, see follow-up post!].

In theory the "electric rocket design" with a single propeller might allow higher efficiency: larger propellers are generally more efficient (thrust per watt). (However, the model in the video won't be very efficient, the props are quite small. And there'll be other tradeoffs too.)

Also, this is a refreshing take on RC aircraft that hasn't been done as much before.

Lift is generated on both sides of the propellers in both cases.[7]

Optional reading:

[1] Generally - variable pitch quadcopters exist. However that gives up the mechanical simplicity that's one of the main advantages of quadcopters over helicopters. Their advantage is that they can actively decelerate a lot more efficiently and also fly upside down easily.

[2] And turns the copter (yaw). Quadcopters use two pairs of counter-rotating propellers to be able to cancel the yaw.

[3] Quadcopters are unstable and need to measure linear and angular acceleration and correct the propeller speeds very quickly. Control frequency of 100Hz flies, 1kHz is somewhat standard, 32kHz is state of the art. (Note: Propellers have significant inertia. To give an idea, reversing prop turn direction in-flight takes ~1sec (and requires special symmetric props if it's supposed to work efficiently).

[4] This is feasible since the propeller is smaller (less mass, less inertia) than for helicopters.

[5] Due to gyroscopic effect, the tilt of the aircraft is 90 degrees out of phase.

[6] Assuming the typical variable-pitch helicopter. There are other options both for real life helis as well as for models (fixed pitch, coaxial, ...) but they're rare (or very cheap toys).

[7] Side remark: lift is generated due to flow turning, not due to different pressure differences caused by different airspeeds over top/bottom of wings as is taught in school. Search for "NASA incorrect lift theory" to learn more. https://www.grc.nasa.gov/www/k-12/airplane/wrong1.html
As the constitution clause states, it's not the goal to have these exclusive rights; these exclusive rights are the means(motivation) by which to facilitate the creation and publication of such works.
Fair, but that misses a bunch of short-running simple operations where hg does badly; things like "print the repo root" or "print the current branch name" take several milliseconds in Git, but Mercurial needs an order of magnitude longer (see e.g. https://www.mercurial-scm.org/wiki/OxidationPlan for some description of the issues there). Doesn't seem like much, but those add up, especially when they're wrapped up into other scripts that might run several of those in sequence.
Trial by social media apparently overrules the opinion of the actual justice system. The courts acquitted the author of the essay, but the editor paid the price for publishing it. Not only has the messenger been shot, the credibility of an old media house has decreased. Ironically, the news is published on NYT - an org that had the guts to ignore social media lynch mobs while hiring Sarah Jeong. The editor of the New York Review of Books is much less visible and controversial - pity that this happened. Must've been an easy target for a trigger happy boss.
About two and half years ago I've been using Dart as an interview language for several companies (even though their stack did not include it). Except for one python shop (who were really looking for a hard-core python dev), everyone else was happy with my solutions presented in Dart, because ultimately: (1) the skill in one language is transferable to another one, (2) the job is rarely about
a specific technology, rather about seeking a solution.

It usually starts with a small, new thing to adopt a new tech (e.g. a not-yet-important mobile app, or a medium-sized single-page web app), and eventually it can take over other parts of the stack. How fast it happens is really unpredictable.
I'm tempted to attach electrodes to this very article in the hope of extracting some information from the noise.

Someone should write a generator of articles like this:

"One day, in <random_year>, <intro_character> was [swimming in the Caribbeans|strolling in the streets of Manhattan|hunting bears in northern Alaska|having a tooth removed|relaxing in an Amsterdam coffeeshop] when [received an unexpected phone call| noticed something relevant to her research|experienced a vision of the Truth]".

<intro_character> had been working for [months|years|decades] on [visualising neurons activity|teaching salmons to count|developing fluorescent cabbages|cloning ancient etruscans]. Now, there was some hope...

Since <other_random_year> scientists had been studying the issue, but progress was slow, because [only a few researchers in the field| salmons brain is very small| Italian bioethical laws].

In the meantime, [5000 km away| on the other side of the globe| in the opposite building| in Poughkeepsie] <another_random_character> had been... Etc.
You mean because the word "ontology" has been embiggened a bit?
Mercurial tries to use hardlinks to share as much actual repository data as possible when doing a local clone. Maybe that's the part that's interfering here. You can try using hg clone --pull instead of just hg clone, which will not do hardlinks. Don't have much experience with terribly large repositories in Mercurial, though. Those we have at work have maybe a few thousand files and less than 20k commits and they're not particularly taxing.
A legal contract is not explicit. There usually aren't any details about any court and its procedures, any dates regarding the court, nothing. A legal contract is implicit - relies on the legal system (that is complex and changes often). Making a truly explicit legal contract is way harder than it should be - and impossible in most countries.
Another really cool thing about how flutter works is that it gives you much more confidence about how things will render and work on iOS -- drawing every pixel would look like insanity to any onlooker before the project existed, but now that they've done it, and basically faithfully recreated Apple's UI, it's more of the process you can do without actually owning an iphone/ios development machine.
It took a moment to realize the term Steam Play is a bit overloaded here. It refers to titles that are cross platform and apparently more recently it refers to the Proton-based emulation layer as well.
> You forget China's intervention in the Korean War/North Korea.

Unlike the USA? So if China came along bombing the shit out of mexico, you'd expect the US to sit on their hands?

> They've also annexed Tibet

Annexed is hardly the right word. Tibet was part of China for centuries, they regained power after a brief period of independence. It's well within reasonable to disapprove of that, but putting it like China just conquered that totally different country that it had no relations with before is just wrong.

Same with Taiwan. To China it's a province where the government has been taken over by separatists, so why should they just give it up? Western media conveniently never mentions this so again in the minds of people Taiwan is just this country that has existed forever and is now attacked by the evil Chinese. Just pull up a list of countries which do and don't regard Taiwan as its own sovereign country and not part of China.
My point is that that crazy amount of work is being wasted on a music career.
(I wrote a bunch of gcc's initial support for optimized code debugging, as well as the initial associated gdb support for evaluating location lists and expressions, which is what makes this all work under the covers)

Given the invariant of "debug info does not affect optimization", you end up with plenty of cases where your only possible choices are "give the user a possibly wrong value for the variable" or "say the value does not exist anymore".

Most of the time, the latter is done instead of the former.

You also unfortunately cannot just mark them so the debugger tells you "this may be wrong, it may be right, good luck".

Historically, compilers tried doing the former, users complained enough that they switched to doing the latter.
How you know they are not representative? If that tweet has considerable response, then those who liked it are represented by it. Most of those who retweeted it are too.
There's a whitepaper at https://www.elixxir.io/

Article by "@Elixxir_io" https://medium.com/@elixxir_io/welcome-to-elixxir-eea7bb9357...
Do you have a widget catalog somewhere that I could try out on my device?
If this is normal quantum mechanics and the "worlds" are not real, separated physical objects -- and they are just mathematical constructions -- what problem does the MWI solve precisely?

If the universe is an isolated quantum system evolving unitarily, how does the MWI help to understand the laws of physics that we observe?
Kotlin is from JetBrains, not Google.
> Another reason:

> Verzilov had been working on an investigative story about the deaths of the three Russian journalists, Alexander Rastorguev, Orkhan Dzhemal, and Kirill Radchenko.

This is the most likely reason, because:

> Russian journalists killed in Central African Republic were researching military firm with Kremlin links, their editors say

https://www.theguardian.com/world/2018/aug/01/russian-journa...
Check out this guide to make your app ideal for your users
I feel like this is something the compiler could do automatically. Give it a hint, let it do some alias analysis and discover that a particular variable won't change throughout a loop. And then let it treat that variable as a constant (as an immediate in instructions) and generate the code to modify it at the beginning. Perhaps let it pass on this information so that eventually the section could be mapped W+X.
6 Best Practices for Moving from TPM to TPO
Every year at Google IO Android APIs get partially rebooted, the NDK already got three build systems, Android Studio is being rebuilt from version to version.

Good luck to those that jump today into Android without the background how it grew up since the early days.

Documentation is outdated and many of the still documented best practices have long been replaced by Medium posts and SO answers about the new best practices that replaced them.

https://medium.com/@steve.yegge/who-will-steal-android-from-...
I was wincing at that too, but then I realised its probably just as well it was tested in such an environment. ;)
>How does that change things?

The point is that there won't be a shortage of new music even if everyone stops being paid to make music.
Well, they usually don't have variable pitch. But there are a few rare examples of variable pitch quadcopters, for instance this monster from Curtis Youngblood:

http://www.curtisyoungblood.com/legacy-product-support-curti...
I really like the styled-jsx changes. One major issue I had was the fact that it's been difficult to pass styles onto child components without leaking them through the entire application. I'm really glad to see that they fixed this issue. Great job, Next.js team! I'm really blown away by Zeit in general.
A helicopter uses a rear rotor to counteract the main rotor rotation. Here he is using thrust vectoring to perform that task.
If you haven't been following it: "Steam Play" is the product name for Valve's repackaging of dkvk and Wine together inside their Linux client. (Lots of the code is open sourced at https://github.com/ValveSoftware/Proton/

>Steam Play allows you to purchase your games once and play anywhere. Whether you have purchased your Steam Play enabled game on a Mac or PC (both Windows and Linux), you will be able to play on the other platform free of charge.

I've been using it for a few games, and the experience is great. There are lots of folks finally deleting their Windows setups and moving to Linux full time because they can finally play their AAA titles on Linux without any installation hassles.
> A few hours later somebody digged out a pdf from an old archive but wasn't sure if it's the correct one, so we ran `ipfs add file.pdf` and the ipfs link started working again.

So the file was lost until it could be recovered from a different source and IPFS served the function of a glorified hash database, that's something very different from what it promises.

Bittorrent has the same mechanics with magnet URNs, but you never see them promising permanent storage.
I'm in that business and am currently actively working on the same sort of project. Maybe we should talk... (Email is in my profile..)
The Human API Manifesto
I think self-hosting is possible with matomo.org
I guess what is missing from your equation is that the model you are advocating for is not sustainable for large parts of the population. Just imagine everyone doing this, do you think the countries could still exist the way they do? It‘s all and well that you decide to fund some medical tech but what about all the other areas that need attention? Your giving portfolio doesn‘t really strike me as well-balanced in that regard. Additionally, I would question that you are actually giving an amount similar to what you would be paying in taxes. So your argument that you provide more value to society doesn‘t strike me as obviously credible. I would urge you to really do some more comprehensive estimations and analysis before making such a claim – at least if you are interested in the „truth“ and not just making yourself feel good about yourself.

On the other hand, I see the possibility for what you are doing to have a positive impact depending on what you do and what you use your money for (maybe have a look at 80000hours.org to get some inspiration). But you have to keep in mind that this is just a marginal possibility for rather small parts of the population and that this model probabaly wouldn‘t scale at all. So, it might make sense to keep this in mind when you discuss and think about this topic.
Which Is the Best Institute for VBA and Advanced Excel in Delhi?
"a bit more flexibility" and "half a million take-home per month" aren't in the same ball park (to paraphrase Pulp Fiction: it ain't even the same sport)

Apologies if I'm coming off as offensive or patronising, but I really truly cannot see what there could possibly be to complain about that isn't entirely within their control to change.

I think there's a bigger picture that you might not be stepping back far enough to look at.
For a strong contender to "next-gen DVCS", I recommend checking out https://pijul.org/.

Written in Rust and based on a sound theory of patches. If GitLab actually merges Mercurial, I sincerely hope Pijul is next.
That certainly explains your thinking a bit better. Thanks.

If you're reading things that say "Three people tweeted about this therefore it's fact" then sure, you're reading something that's nonsense. Articles need more than that to demonstrate there's a groundswell of opinion around something. But Twitter is no different to any vox populi source in that regard - in the things I read I don't think tweets are added to articles to prove anything; they're there for color and emotional connection. Without referencing the real world in their work reporters would write very bland and inhuman articles that would be horrible to read for most of their audience.

I think I'd rather read a properly researched article with those tweets than one without them. If the article isn't properly researched then no amount of tweets is going to rescue it.
Mostly its symbiosis. When you have that much waste in the management layers, there is high degree of mutual political co-operation. This is even more easy in a 'Product Manager' position, you have quite literally no deliverables and almost nothing to report to your immediate manager(Who themselves have no deliverables). Often the thing they have to show are some metrics, which are generated by engineers, even the information that goes into the slides comes from engineers. So they basically 'own' the product, in the sense they get to make go-nogo calls during product launches.

Product managers are also insanely famous for killing features just to assert authority(This apparently comes while trying to appear like Steve Jobs. Steve Jobs said no to features, so we say no.).

The people managers don't put up a fight because they too are probably over staffed. The Managers/Real-Contributor ratio is high, and they know if they open their mouths and protest, their jobs are on the line next. So they let things go on.

A while back 'Program Managers' were in a similar state in most companies. I know places where they fired the entire Program management org and didn't notice any change, not even a faint pain. That was how contribution-less the whole hierarchy was.

The other part is obvious. These companies are full of VC money. They didn't earn it. The founders didn't earn it. Its free. After all its not like a loan you pay back, if the company falters, the founders or anybody of authority doesn't owe a dime to the investors. So they splurge. They spend on people. Most importantly they spend on their friends, who can help them get jobs else where.
Bullies will be bullies and it is not uncommon for people wanting to belong to a group or take sides at the expense of someone else. This sort of behaviour seems to be common especially during childhood in schools where someone will be 'it', if you know what I mean.

Now don't take this the wrong way and think the world is against you and don't get bitter. These moments can be great moments to learn and grow up, and not every act that seems hostile is, or is at least deliberately so in full awareness of the perpetrator.

Like it or not, the onus is also on you to fix your shit, whatever that may be, and try to understand these situations and what behaviour on your part may contribute to landing in them.

I'm talking in general terms not knowing anyone's situation but mine.
> Mercurial is much easier to understand and use than git

I simply do not find this to be true. I've used git for years and tried to use hg to participate in a project and I straight-up just could not understand its branching model and how exactly I was supposed to use that tool. I ended up maintaining my work in a git repository and very carefully doing individual commits and a push in the hg repository only at the very end of a long work period. My daily work remained in git because I could not for the life of me understand how people work with that tool with regards to local branches and squashing. (Which, sorry, I cannot do without.)
> nd the blame goes to Ticketmaster

This argument is repeated over and over again, but i just cant imagine that being right. This is not usually how efficient markets operate, taking into account all the subjective brand appreciation. I can believe that Ticketmaster can shame any artist outside ticket master, or some other network effect, but not that hating ticketmaster, and deteriorating the user experience, is the economically efficient way to do it.
I've seen similar statements about many pieces of professional software. The key point they forget to mention is that these small percentages are different for every user.
I’m impressed with the illustration: it does a very good job of conveying just what the product is. It is, admittedly, much simpler than most products, but it’s quite an achievement all the same. I imagine that it’s a slight simplification, but perhaps only very slight.

It looks to have a couple of errors, though: the intro field in it doesn’t look right: the default editor type is wysiwyg, so I presume there should be a toolbar there in practice; and it has required=false, so I presume the red star should be missing.
How does this get to front page :) ? It is an announcement from what i think is an unknown company (?), no demo product or even screenshots.
The most alarming part of the article for me was the reference to climate change and its impending consequences. I

I may say I've been living under quite a rock for I hadn't thought of it as mentioned here in this paragraph:

" The book’s most fascinating and disturbing chapter is about how the Internet, the primary vector of information about climate change, is increasingly a vector of the problem itself. The world’s data centers already have roughly the same carbon footprint as the global aviation industry, even as people continue to speak of “the cloud” as though it were a barely corporeal entity. As temperatures rise, our information technologies will function less efficiently—increased heat and humidity will hamper the flow of wireless transmissions and satellite communications—and a vicious cycle will commence. (Bridle makes a similar point about cryptocurrency, that supposedly revolutionary and transformative technology: if its rate of growth continues, by next year Bitcoin alone will account for the same level of carbon output as the entire United States.) Even more depressing is the contention that climate change could actually wind up making us stupider: he cites research showing that human cognitive ability decreases significantly with higher atmospheric concentration of carbon. “Carbon dioxide clouds the mind: it directly degrades our ability to think clearly, and we are walling it into our places of education and pumping it into the atmosphere,” he writes. “The crisis of global warming is a crisis of the mind, a crisis of thought, a crisis in our ability to think another way to be. Soon, we shall not be able to think at all.”"

I am genuinely in an odd state of distress at this point. While I continue to function normally in society and keep living as though it is something so far away in the future, a special place in a deep corner of my mind still seems to nudge every once in a while when I am alone and drive me to borderline insanity.
Why XACT_ABORT Is the Devils Tool in SQL Server
Be the brand or join a brand?
Having to learn a new programming language is hardly a rare experience in mobile development.
defacto standard for professional traders and finance

What do professional traders do nowadays? My impression was it is already bots talking to bots and/or index funds outperforming/on par with actively managed funds.
Ah, thanks! Some helecoptors also just use a second main rotor spinning in the opposite direction instead right?

Would that not be sufficient? Sorry if it's covered in the video I've only seen the beginning so far.
There's always another bridge:

https://tech.olx.com/fast-prototypes-with-flutter-kotlin-nat...
Discussion about the pitfalls of using XACT_ABORT in SQL Server
"Art" is mostly meaningless as a concept so I don't understand the point you're making.
And also Matomo (https://github.com/matomo-org/matomo)
EMM, Enterprise mobility
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On a related note, India's UPI[1] and Australia's NPP[2].

[1] https://en.wikipedia.org/wiki/Unified_Payments_Interface

[2] https://en.wikipedia.org/wiki/New_Payments_Platform
Android development resembles web development?