skysight-inc/HackerNews huggingface dataset:
> Bearings work to help one surface slide along another by minimizing the points of friction between the two. Imagine sliding a book across a desk. There's friction at all points where the book is touching the surface. But if you put that book on top of some pencils, there's only friction where the book touches the pencils and where the pencils touch the desk. Suddenly that book is practically racing across the table if you so much as nudge it.

This description of why bearings work is terrible. If the advantage is just reducing surface area, then that would be a runner: pushing the book along the pencils long-ways. This actually does not reduce friction, since the equation for the force of friction does not include a term for surface area. (There are some real-world exceptions--runners on ice for example.)

Bearings work because they replace sliding friction with static friction. Static friction is actually higher than sliding friction (otherwise things would never stop sliding), but it never comes into play because the load-bearing surfaces don't slide relative to one another. This is also why antilock brakes tend to reduce stopping distances for cars.

Bearing cages do experience sliding friction, but not on load-bearing surfaces. Since the normal force is therefore much lower, so is amount of sliding friction.

It's true that in theory, eliminating the cage would reduce overall friction in a bearing. However bearings have to live in the real world, where materials are ductile or friable. Small indentations in the load-bearing race will only be durable if the load at that point is well under the yield strength of the materials. Otherwise the balls or the race will just deform and lose the advantage.
Why not lmdb?
This is pretty nifty. Obviously there's a lot of malicious uses for this, but as someone who supports a lot of seniors with near inability to remember passwords, this sort of thing has a practical use.
My experience at a startup working with some big companies, is that you really need to become another employee for those you're selling to.

For our key customers, everyone on the team knew as much about their product road map as our own.
Most of the other Data Scientists are making ~$135k, maybe just a typo or parsing error resulting in an extra zero?
That's really the key.

Recall CentOS before RedHat was brought back into the fold. RedHat was always referred to as PNAELV, a "Prominent North American Enterprise Linux Vendor" to avoid running afoul of trademark issues.
Ceramic balls and races are currently used in some high end bicycle parts. They have exceptionally low friction. See chris king bike hubs for an example.
I still use three.js for most of my visualization projects. That is some good tech. Ashes of Papervision risen better.
Something like Aircraft jet turbines might qualify. They are designed to handel a mid sized bird stike or the loss of a blade which is way outside the normal force range. Though, I suspect they are heavy enough that rolling friction still dominates.
AFAIK trademarks don't work that way. You can "use" a trademark in a text or computer program more or less freely. What you can't do is do business under the trademarked name, or offer a competing (or substantially similar) product for sale that uses the trademarked name. Trademarks aren't so much about "IP protection" as they are about preventing consumer confusion, thus the standards are different. IANAL.
What is the formula used for confidence interval ? "0.0%-106.9%" interval for low numbers is somewhat disturbing. What approximation cause this problem ?
You might be excused if your project wasn't intrinsically related to the most popular DVCS in history.

Just publish the repo, right now, and hope for the best. Don't forget to include a license file.

Can you think of another action you can take right now that would change public opinion of your project more? :)

Bonus points for self hosting!
It should be pointed out the 'Shock and Disbelief' re: this shortage wasn't about the more publicized shortage of public IPv4 addresses but about a shortage of private RFC1918 IPv4 addresses within the company. Something that most people probably take for granted due to NATs etc...
For the record, I think Postgres is an all-round better database than MySQL. I've experience with both in large production deployments.

I still think that's not fair to compare MySQL to Citus DB. That's the point I was trying to make. Citus is a multi-server MPP database for analytics. MySQL doesn't have a player in that game. I would certainly be interested to see a (fair) comparison between Citus, Redshift, Vertica, Teradata, Greenplum, Snowflake etc... but that's a different thing.

Parallel Sequential Scan sounds great, but it's not here yet. When it is, we can see whether it makes Postgres a one-stop solution for both traditional, transactional work as well as analytics (which tends to do better on column-oriented stores)
I didn't find it helpful - confusing, yes. I found the spec better, which I thought there'd never come a day I'd say but yes - the flexbox spec is the best resource for understanding flexbox. Wow. I know.

I think I'm just ranting on the html layout rules in general, for instance:

https://css-tricks.com/almanac/properties/m/margin/

This points out like 3 things that make NO SENSE. To center something horizontally, you use margin: auto; What? Margins are for having space between elements, not for centering anything. But ok let's say it is for centering, which makes no sense, then you should be able to set the vertical margins to auto. Wait, you can't do that. WHAT!?!

It goes on to say if you have 2 paragraphs with top and bottom margins, that doesn't mean you have 2 paragraphs with top and bottom margins some of the time. Because 2 paragraphs, the top/bottom margins of the 2 paragraphs will collapse. WHAT?!?!?!?!

Yeah, flexbox is just another abysmal attempt, in the right direction mind you. I don't know who runs the show but I'd say a 3rd year comp-sci student in one year, can come up with a better layout engine (how it works, not performance, by copying auto-layout for instance) than what is currently in existence.
It is also crashing for me with Firefox 38.0.1.
Comcast ends an interconnection fight before net neutrality takes effect
Hi there Meat folks! Congratulations on the release, it looks really nice. Can you elaborate on the reasons for making something new? Feature wise GitLab CI already has deploy jobs, the only thing I see that is still missing from GitLab are chained builds http://feedback.gitlab.com/forums/176466-general/suggestions...
Yeah - I'm sympathetic. It's often difficult to sell people on the notion that integration testing might be just as expensive to implement as the service/feature that you're building in the first place.

It sounds like this is partly an education issue - are there specific areas within your problem domain that more tooling would actually help with?
My comment was without any kind of adjudication about the hot wallet breach itself, just a friendly reminder that there's a lesson hidden here: situations where something "shouldn't ever happen" need to be considered in the context of our systems and businesses. It isn't a panacea but while $332k is a lot of money, $66.4M is a lot more.
Can you edit your post? You may want to make specific mention that you're talking about the MS toolchain. The open source toolchain for CI and integration with Linux/FreeBSD hosting/cloud providers is sufficiently mature to not run into the pain points you describe (build systems, containerization through lxc and docker, aws and every other cloud provider's api, and so forth).

Disclaimer: Infrastructure engineer who does DevOps as well.
The kludge to re-use Nespresso pods has been hacked.
I worked for a hardware startup for 2 years. In my experience, part of the reason "Hardware is hard" is because it's not something that a lot of people in the tech space have spent their lives tinkering with in the way that they have with computers. Version 0 of software just runs on your computer than you already have. Version 0 of hardware (beyond 3d printed prototypes) isn't fundamentally impossible, but most of the startup people I know aren't the sort who know how to cast aluminum in their backyard, for example.

We shot ourselves in the foot by paying for tooling for castings before we'd validated it beyond 3d prints. It ended up having minor flaws that we couldn't fix because it required adding material to the tooling, which isn't something you can do easily. If we'd had somebody on the team who was the sort of guy blowing shit up, setting stuff on fire, and making aluminum ingots in a homemade forge when they were 16, I'm confident we wouldn't have screwed up in such a basic way.
The information should be available to them. If the fund does not have a sizable exposure to the particular company, it might only be as a statement in the prospectus that the fund can invest up to a certain amount in a certain type of company.

A flip side of this is that one of the many things that contributed to the housing bubble was the requirement that many pensions have to invest in bonds of a given rating. This helped fuel the market for rubber stamped mortgage derivatives.
I'm working on Beetle, a command-line ETL tool written in Java (if it goes well, I'll add a Swing interface). It's rudimentary at this point, but soon you'll be able to execute a SQL query and save the data to XML, JSON, YAML or a SQL script of Insert statements. You'll also be able to generate fake data in any of those formats, and also translate data between those formats, or push the data directly into a database. Any database with a JDBC driver is supported. As it gets more robust, I'll add features that seem useful.

https://github.com/argonium/beetle-cli
Hi mosselman, just curious to know why GitLab doesn't fit your need.
Alternative treatments for diabetes
I've heard great things about the battery life on windows mobile phones.

http://piaw.blogspot.com/2014/09/windows-phone-vs-android-ec...
...multiple copies in mutiple places
Hasn't happened to me, but it's happened several times to a guy I work with. They always claim that they need help with some software issue, I guess to make it sound more plausible, though I have no idea why anyone outside the company would call us for software help.
Has anyone else noticed Arq getting more buggy lately? I suspect it's the proliferation of storage options and the compromises required to support them all.

I would be happier with a more bulletproof app that only backed up to one provider.
Incidentally, I was the one who contributed #38 in the one-liner list. :-)
I'm sorry to hear that. Just checking, have you added 1GB of swap? https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/inst...
If you are willing to pay nespresso prices, you should be fine throwing out coffee in your scenario--yoh will still save money even if you always dump out half of it.
Makes sense, then maybe this would prevent him from listing slack anywhere on the repository as it might confuse users that this is a legitimate client.
I'm afraid I don't see the connection between the decision not to implement encryption and the presence of death causing defects.
Why would you want to do that? That sounds absolutely horrific.

Just center the div in absolute mode. You need to have it wrapped in something though, to have something to center against, but you shouldn't have tables in there unless you want them.
It makes sense after you've worked with it for a little bit, I had the same confusion when I first started using it but after a while it started making sense and by now I absolutely cannot see myself go back to anything else, it's just so pleasant to write in.
Dug up some details on the R8 used in the CHIP. It doesn't look like it'll have much juice. There are comparable chips out there (made by Atmel for example) in terms of speed/performance.

Single Cortex-A8 (don't disclose cache sizes)
DDR2/3 up to 530MHz 16-bit bus 512MB Max capacity
Support NAND/SPI Nor/SD Card
1080p30 decode, 720p30 encode H.264

They don't disclose the clock but can't imagine it is high.

[1] http://www.allwinnertech.com/en/clq/R_series/2015/0514/6066....
Here's your first look at Uber's test car
Trademarks are about IP protection, but the exclusive right in the mark -- the thing that is property -- is the right to use the mark to market products in a particular domain.
You are only considering direct effects of a bubble bursting. But those burned VCs will be skiddish in investing in new start ups.

All the VC money that is driving huge growing in SV may disappear for a while. A lot of the money won't come back. This means unemployed people, which means pay falls for everyone.

It means less small VC fueled companies buying services that more established companies sell.

So yea it might not crash the S&P500 like 2000 did, but it would still have a huge impact within tech companies.
How girls take Selfies :p
Agree and commit, disagree and commit [video]
Thanks for appreciating our effort. Responding takes a lot of time but it is a lot of fun as well. We use http://notify.ly/ to ping us in a Slack channel to be able to respond fast, highly recommended.
Care to explain? The OP's question was not whether it was a good idea, but the specifics of how, where, and why a particular website marketplace.
Yes and no. The neighborhood where I live was laid out eighty or ninety years ago. Most families probably had a car by 1940, but I doubt many had two. Most had garages, some had driveways but no garage. Now I suspect that we are unusual in being a two-adult household with one car. A neighbor across the way has four vehicles--three cars and a pickup truck, all of which they must park on the street.

The increase in cars per household means that for a good ways in every direction, any side street will have cars parked on both sides. Two ordinary sized American cars can pass each other in what is left, but drivers usually find it safer to look for an unparked space where one can pull over a little. Twenty-five miles per hour does not feel slow on these streets (particularly from the right front seat).

You are completely correct about the residents wishing to slow things down. Thirty years ago one could get onto 13th St. NW in downtown Washington, and with a bit of luck hit no red lights all the way to Maryland. Now there are stop signs sprinkled between the lights. In Chevy Chase, there is I think one path left that takes one through the neighborhoods from Jones Bridge Road to Beach Drive where once there were many, the rest now blocked by barriers.
Could someone please explain what a "content-addressable union file system" does?
I think that maybe more accurate for entry level developers. Housing is an issue to work around for sure.

Seattle - Yes (but also quite expense)

Austin - Yes to a less degree

Portland - Maybe.

All of these are great cities with plenty of dev jobs. You really need a strong CS program to build around if you want think about not moving to Silicon Valley. University of Washington totally fits that bill, as does University of Texas- Austin, but I would have to guess that Portland has a good local university (but I'm not familiar with it from afar like the others)
This is because many people buckle to their boss. They are afraid of losing their job, so they better don't argue.

This has dire consequences, as we can already see.

I made my boss clear that he's not doing me a faviour by employing me, but instead we've made a fair deal: I work in the companies interest, they give me money.

My leader in the company can help to organize and represent my work, however, he can not treat me like a resource nor give me orders.

I fared very well by being clear on this in the beginning. Now I am basically free to work on what I think what needs to be done.

It's a decision to accept authority over you. You do not have to. Often, you shouldn't.
Thanks TeraFlop, good to see our news of the visible-source enterprise edition spread so fast https://news.ycombinator.com/item?id=9588729
$100k to Altman is like $100 for you.
Well said, Ed!
I am another one that also enjoys the recent microsoft effort to open source and be more open with the community.
I think devops envolves a lot of scripting, having a POSIX compatible shell out of the box in Windows would help a lot. Same for a decent ssh client.
If you want to read a terrific interview in which he touches on WWII's effect on him, how Socrates could get to heaven, how programming has turned to pop culture, and of course message passing, see his interview in Dr. Dobb's[1]

[1] http://www.drdobbs.com/240003442
Right -- for the right candidate. I don't buy things without vetting them first; why would I expect someone else to? The suggestion that there is some exact figure out there that you are worth is false binary thinking. There are lots of factors that make you a better or worse candidate for any particular job. The better you are at the art of feeling out the situation and presenting yourself in the best light, the better you'll do, and the more you'll realize that starting with, "What are you offering?" isn't a good tactic.
Ask HN: What makes for a great VR OS?
I was reading Ars' preview of Google I/O (http://arstechnica.com/gadgets/2015/05/google-tracker-io-2015-edition-android-m-chromecast-2-and-lots-more/) which mentioned that they are preparing a version of Android suitable for VR. While I am experienced in combined hardware/software platforms and consumer electronics, my knowledge of operating systems and how to evaluate them is pretty weak. It's an area that's totally blind to me, and I couldn't help but think this is Google's equivalent of Microsoft's initial versions of Windows for phones, which were ill-suited to the form factor and usage model.

Beyond just predictions for whether Android or Oculus or whomever wins this space, I was curious what criteria you would use to evaluate the suitability of an OS platform, specifically for a VR application. What technical underpinnings are necessary? What features do you think will really differentiate a platform? If there's anyone writing about this in an approachable way, I'd be interested. I know Carmack speaks about it a great deal, and I've read a lot of Abrash's thoughts. They all seem to range from reasonable to brilliant, but I don't have enough background to really offer a thorough criticism.
Passwords which can be recovered with a tool by someone other than the user to whom they belong, and passwords which tend to be forgotten by the user to whom they belong, are two different failures of the whole function of passwords.

Its true that the first failure can be used to mitigate some of the visible harm of the second, but any place that features a coincidence of the two failures really should be taken as a particularly strong sign that, in that place, passwords of the type used are entirely the wrong tool for the job.
Altering Course: Why the US may be on the cusp of an energy revolution
I'm definitely not trying to limit things to the Microsoft toolchain. I recognize that composability is super important, and anything we build should participate in the greater ecosystem.
I don't think that would be feasible for something like MSFT as they can loose their market control but it would be a dream come true for devOPs - switching between the Clouds or using S3/SQS with Azure.
Smart Regulation for Smart Drugs
Going to crowdfunding before contacting factories and thinking about design for manufacturability seems dangerous to me if you haven't done hardware products before. Real products are rather different than arduino / raspberry pi prototypes.
I'm impressed it (apparently) learned to align screw caps with a short backward turn at the start.

Then again, why do we make so many containers with these ungainly screw caps? Ever use those caps (popular in Japan) with the locking track that only take a quarter-turn to close? Examples

http://www.amazon.com/Yu-Be-Moisturizing-Skin-Cream-Skin-1/d...

http://www.amazon.com/Biotene-PBF-Toothpaste-Ounce-Pack/dp/B...
That's what Hired is trying to be, isn't it?
I agree, when you're forced to eat at McDonalds, choose the shitty salad.

Have you worked with auto-layout in xcode? If you did that and used flexbox and chose flexbox, I'd be flabbergasted.

Given the choice between blocks, inline-blocks, floats and flexbox - I'm choosing flexbox 100% of the time. Doesn't mean it's not painful however, just that the other options are insane.
Use margin: auto and absolute positioning to center something vertically. No tables or special magic needed.

I think "margin: auto" maybe should have been written "margin: center" to make it more obvious, but the feature is there.
Head of NYDFS Ben Lawsky Leaves Behind a Complex Legacy
> I'm afraid I don't see the connection between the decision not to implement encryption and the presence of death causing defects.

That's fine. Everyone is entitled to his/her opinion. I view the failure to implement encryption as a fatal error and an indication the code audit hasn't been thorough. Given that this is a telesurgery product, I'm quite confident encryption, trust, and authenticity are central to safe medical procedures carried over network. Otherwise, why would we bother with TLS when we access our online banking?

I'm just not confident I would want to undergo a surgery with a telesurgery robot with the "decision not to implement encryption."
Working on serving minute long training videos with nodejs using sendfile() on freebsd.
If you took the time you've just spent calling flexbox "retarded" and used it to read the basic documentation of the properties you claim are impossibly unintuitive, you would know the answer to your question.

Switching orientation is a basic requirement for the whole idea of flexible boxes in CSS. From MDN [0]:

> The flexbox layout algorithm is direction-agnostic as opposed to the block layout, which is vertically-biased, or the inline layout, which is horizontally-biased. While the block layout works well for pages, it lacks sufficient definition to support application components that have to change orientation, resize, stretch, or shrink as the user agent changes, flips from vertical to horizontal, and so forth.

[0]: https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Flexi...
https://github.com/mafintosh/hyperfs/blob/master/README.md#c...
CoreOS Fest and the world of containers, part 1
I prefer flexbox to auto layout in Xcode, actually. In fact, for Mac apps I've always turned off auto layout and gone back to springs and struts, since they're so much simpler...
> but the engineers in question are exactly the kind of people who don't need to take outside investments and are able to bootstrap (as in use their own funds and rely on immediate/eventual cashflow).

no, they're exactly the kind of person who wouldn't do a startup. you're thinking about this from the wrong end. risk averse people are generally the ones who make $1M/year at salaried jobs, exceptions like financial traders notwithstanding.

quite frankly if i could make $1M/year working for a megacorp i wouldn't have started my own company. these two things are mutually exclusive for me. why would i bust my ass if i could take 2-week vacations whenever i wanted and get paid $1M/year due to my elite skills?

in many respects, i started a company because i wasn't good enough to really 'make it' as an industry leading developer. i capped myself out as a consultant at about 150k/year. but i wanted more money.

many of my associates who also own businesses (tech or otherwise) also started because they were basically unemployable due to a variety of factors. issues with authority, massive egos, chip on their shoulder due to a previous fuck-over or failure, inability to kiss ass, did terribly in school, have a felony conviction from their misspent youth, etc.

these kinds of things aren't talked about in mainstream media but if you dig deep into an entrepreneur's past, you'll find this stuff a lot. normal, employable, salary-seeking people generally do not start companies of any kind.