skysight-inc/HackerNews huggingface dataset:
You're most likely right, but there is at least one caveat which might be able to help if we're lucky. (I'm a fluid dynamicist, though not an aerodynamicist.)

The Reynolds number is only part of the picture. You also need a measure of the strength of the turbulence. A common measure is the "turbulence intensity", which you can think of as the standard deviation of the velocity divided by the mean of the velocity. (Though that's only exactly true in "isotropic turbulence".)

In certain circumstances you can compensate for a higher Reynolds number with a lower turbulence intensity. The bristles of the dandelion may have a turbulence reduction ability, so perhaps this is already being done. I'm not certain how to reduce the turbulence level further as in this case it's mostly an ambient property which is beyond the control of the dandelion. Some sort of honeycomb structure upstream of the bristles might help, or it might hurt; it depends on the details.

Here are some examples:

Pipe flow can remain laminar for higher Reynolds numbers if the turbulence intensity is low enough. Though special turbulence control approaches (e.g., eliminating vibrations which could trigger transition to turbulence) laminar pipe flows have been observed at a Reynolds numbers of about 100000, about 50 times higher than the typical Reynolds number where laminar flow ends.

Here's a quote from a review article:

https://www.annualreviews.org/doi/abs/10.1146/annurev-fluid-...

> The impression gained from presenting data in this way is that there is a transition between two definable states. One is the relatively rare but well-defined state of motion, laminar flow, and the other is the more common and ill-defined state of turbulence. Experimental evidence suggests that the laminar state can be achieved in pipe flows over a wide range of Re with the record standing at Re = 100,000 by Pfenniger (1961). Reynolds himself managed to achieve Re = 13,000, and Ekman (1911) later improved on this to ∼50,000 using Reynolds’ original apparatus. [...] Achieving laminar flows at high values of Re is an indication of the quality of an experimental facility and gives some confidence that the observations will not be contaminated by extraneous background disturbances such as entrance flow effects, convection, and geometrical irregularities.

Matching the turbulence intensity of two wind tunnels is often necessary to make the results comparable between the two wind tunnels. In the first volume of Sidney Goldstein's "Modern Developments in Fluid Dynamics", there's a plot showing (if I recall correctly) the Reynolds number at which the "drag crisis" occurs as a function of turbulence intensity. This basically means that the drag coefficient can be very sensitive to the turbulence intensity, at least in special circumstances.

(Why I wrote this: In my dissertation, I have an entire section about how turbulence intensity is too frequently neglected in analyses, particularly for the problem I'm studying for my PhD.)
Mother of all bike lights
A) I can connect directly

Can you? you'll probably need your own DNS resolver because if the clients are configured for my.custom.domain.com, it's not going to resolve to 10.10.10.10 and your connection is down. So you can have the box do that, but generally, split horizon DNS is a thing you don't want to set up in a set it and forget it install.
There will always be a percentage of homeless that are as you say, usually because of mental illness. To say "most" of them fall into that category is a huge assumption to make without data to back it up.
Yeah I remember when 15% was a good tip and 10% was socially acceptable. Today, even 15% can subject you to social criticsm.

Expected tip is definitely going up.
“Hoarding money” is a non-problem. It’s also known as “saving money”. I would be quite surprised if the various cash rich companies of Silicon Valley are not keeping their money in banks where it’s being lent out to people and businesses which need to borrow money.

Even if they were keeping their gold in vaults, which would be harming them by denying themselves interest they are still not harming anyone. If you have an option to use a certain amount of resources and you don’t then those resources are still available to everyone else. If Bill Gates withdraws his net worth in cash and sets it on fire the productive capacity of the world is unchanged but he’s not going to use that money to buy anything. Everyone holding physical dollars is infinitesimally richer in terms of purchasing power.
Thanks for the detailed reply!

One point that was made in the video was that inside a black hole, space is collapsing faster than light. This seems like more than a change to coordinate system? Doesn't this mean that time is also moving faster than light? Could time effectively become "solid" at the singularity, with all events within the black hole's light cone at a single point in time, but in infinite space(ignoring Hawking Radiation)?
considering prepending the title with "Ask HN:"
If I want to be entitled to my opinion, I have to allow others to have theirs.
There's a good reason to oppose proposition C: throwing more money at San Francisco's homeless problem isn't going to make it go away. The city already spends an immense amount of money on homeless services. By some metrics, it meets or exceeds the average US income per homeless person.

The reality is that San Fransisco can't house all is residents because it refuses to build more housing. And building more housing is something to which the city is highly adverse.
Ask HN: Freelancers, would you use a simple status updates tool for clients?
At a very basic level, the app would…

* Ping you on a schedule you setup to write a status update for your client projects

* Send the update as an email

* Allow integrations with other services such as GitHub to show your checkins related to that work

* Updates sent as you pleased (not be automated) and not be another bloated project management tool
For some reason that site doesn't seem to list all possibly reverse dependencies of libssh.

According to the brew uses command the possible dependents are ffmpeg, ffmpeg@2.8, hydra, sshtrix, tmate, wireshark, and yafc. I say possible because some of those can optionally depend upon libssh, but the user has to opt-in to building with libssh support.
Ahhhh, Kreosan. They get to experiment with all the cool sh^% that if we American tinkerers did the same - - Homeland would be knocking at all our doors with a goon squad armed to the hilt.
> Never Before Seen in Nature

> Many insects harbour such filter-like structures on their wings or legs, suggesting that the use of detached vortices for flight or swimming might be relatively common

I sense a bit of disconnect between the article and the headline.
Exactly. When I'm reviewing resumes - I _really_ don't care (or even want to know) that you flipped burgers during one summer break in college in the '80s or that 15-20 years ago you wrote web backends in PHP or maintained logistics software in Cobol. List your last two or three jobs - selectively highlighting/editing(and, if your referees will go along with it, embellishing them) them to emphasis the specific skills and experience needed for the role you're applying for.

While a "35 year career in Silicon Valley" might sound impressive to some people (and perhaps rightly so), as a hiring manager I probably don't care about any projects/technologies you worked on in 1983... I want to know whether you can do the project I need delivered now. Tell me what you worked on last year and in the last 5 years - skim over or leave out the rest.

(If you're dealing through recruiters instead of directly with hiring managers, you've got a different set of problems - the solution to which is probably ignore the recruiters and don't play that game - surely a 35 year career has left you with a network that can bypass those rent-seeking gatekeepers?)
It's an incorrect implementation of the protocol, yes. That message should only be sent from the server to the client, and the server should not take any action (besides dropping the connection) when it's received.
A linear classifier can only handle linearly separable things, which limits prediction accuracy a lot.
I don't think you'll get anywhere close to this level of classification with a linear model. In the experiments it is shown to outperform SVM RBF.

The platforms in question doesn't have hardware for floating point, any floating point support needs to be emulated in software (slow).
No hits??? Or no callbacks after first contact?

Send me your resume, and I'll take a look (email in profile).
Sure, but this is not a problem money obviously solvable by throwing money at it. San Francisco already spends over $300m/year for helping the homeless, is Prop C going to be any more effective?
Some gems in that list after a few somewhat obvious or just arcane ones
Bear in mind, that there are also some people who are 30 who are not getting jobs.

You list all your accomplishments (35 years, 3 degrees, etc)... what do you say on your resume or your cover letter that indicates you are also hungry to learn? to explore? to be humble? to be part of a team?

And I wonder at 35 years, why are you not leading a team and mentoring others? Why are you still on the lower tiers?

Lastly, there are many job situations, which let's just say, the employer / managers are not even ambitious. They just want somebody in the chair. They have a budget to maintain, or they are in transition. or they have billable hours to meet. They just need a warm body. Forgive me, but at a minimum, I find it hard to accept that someone who is really job hunting hasn't at least found one of these.

Also, what are you requesting for salary? Do you do the coding challenges? Do you call them back promptly? When you are on a phone interview do you talk over them, or listen and answer succinctly? There are many, many factors beyond the mere resume to consider as well.
Do you do leetcode ;)
I am 67 and I have always been able to get very good consulting gigs. I took a full time job a year ago and had to accept a manager role. Your background sounds very impressive, keep trying!
>Personally I believe society as a whole is better when we offer opportunities for education and self-improvement to those who can't otherwise afford it.

And you're welcome to do that with your own money. Why is the cause so moral that others get to decide I have to support it with my money?
Alum (aluminum sulfate) turns polluted lakes from green to clear. Is it safe?
I was not commenting on or proposing changes to anyone’s strategy. I was pointing out the inaccuracy of the idea that tips are compensated in other ways when people order takeout. No restaurant is run well enough that there is not occasional idle or overworked time for staff.
...though the user experience of 'lose it and you've really lost it' has been shown not to work out so well...

[citation: who-knows-how-many-millions of forever lost bitcoin.]
> Yes, you may have 3 STEM undergrad degrees, but no one cares because it's not relevant anymore.

Two of those degrees (MS and PhD) are graduate degrees, not undergrad.

In the specific case of AI, the field has changed massively over the last 10-15 years, so the field-specific knowledge conveyed by degrees further back than that may indeed have depreciated quite a bit.

However, field specific knowledge is not necessarily what makes graduate degrees valuable. It's knowing that you're getting a candidate who knows how to branch out into unknown territory, who knows how to research the relevant literature, who didn't quit when the going got tough, and who can express themselves in comprehensible prose. These qualities don't become irrelevant, even if Isaac Newton was your PhD advisor.
The current budget is $300 million per year for homeless relief in SF. There's approximately 8000 homless in SF.

300000000 / 8000 => $37,500 per individual per year.

How is the problem getting so much worse with almost $40k per year being spent on each individual homeless person? Where is that money going? How are these programs so inefficient that $40k spent on bulk relief is ineffective?

Why does anyone think that just increasing that number per person is going to solve anything, without a detailed plan about how to spend it?

Given the above, it's entirely rational to oppose Prop C, which doesn't provide details, transparency, or accountability about how the money will be spent.
One thing I do to help myself sleep is to think about it in a long term versus short term framework. I don’t know about you, but for me, sleeping less is usually better in the short term. I can get more done, or have more fun, today. But when I look at the longer term, I think that getting more sleep ends up being the better investment. Not just in terms of health, but in others areas too - I make better decisions, create better relationships, and think deeper about problems.

Since most things that end up being successful for me over the long term are due to optimizing for long term outcomes, framing the problem that way helps me stay focused on getting proper sleep.
Caution, this device emits massive amounts of UV light as well which will burn your retinas.
You can purchase copper clad gouging carbon rods on Amazon like 25 to a box or more.
Perhaps. Note that it's not unprecedented. Google, and likely others, offer a similar service: https://support.google.com/accounts/answer/3024190?hl=en
You seem to have a lot of "faith" in the writings of man. You'd make a great Catholic
No one is saying that we should vote down all services that aren't used by <50% of the population. My only point is that decisions are democratically valid if they're ratified by the majority.

The majority of people deciding to have libraries is just as democratically legitimate as the majority deciding not the have libraries.
You make some good points (I agree about people refusing to do coding interviews) but I think your comments don't really fit the situation this guy is describing. I know many of the devs at my company get hit up proactively by recruiters multiple times per week! They aren't looking at all and have 1/4 the experience this guy has. Also regarding the phone screen, he isn't even getting to that point.
Give it a decade and there should be one or two to try out.

[1]: https://en.wikipedia.org/wiki/Starlink_(satellite_constellat...
[2]: https://en.m.wikipedia.org/wiki/OneWeb_satellite_constellati...
I think Benioff's biggest character flaw is that he doesn't do any analysis past the point where it supports his political position. Instead of understanding the root cause of the problem he has his solution in hand and castigates anyone else who disagrees.

Prop C is bad public policy because it does nothing to prevent homelessness, which is what San Franciscans should care most about. The homeless problem has been caused by the government distorting the housing marketplace. Allow people to build housing and get rid of rent control and the problem will solve itself.

I think Benioff should be open to listening to other people instead of being so adversarial.
Your coworkers are neutrinos? Must have a very high turnover rate...
BASIC and any other toy platform are a bad ways of starting programming and primary school kids do speak in assembly code.
Throw some microcontrollers, LEDs and motors to them, they will be happy. Boards like Arduino may be a good option.
And how to navigate a city on your own.
Now this is a subject I can really get behind!
Been thinking about note taking like Journal for a while now. Would love to try it out!
You are comparing the most expensive plan. This was probably 8 years ago so I’m thinking 10-15mbit. The business plan was the entry level one.
No, the way the big boys get around this is outbound email filtering. Limits yes, session and connection heuristics, reading your outbound email to see if you're selling dick pills.
New 100-mile electric van matches diesel vans on price, Workhorse says
If you're not doing it already, I'd highly suggest using every free moment you have during your contract work to network with the client, any other contractors, sales reps, account managers etc. you encounter there. i.e. don't just spend your days heads-down doing the work: get to know everyone you can, and more importantly get them to know you, while you're there. And don't be too busy to take the occasional coffee/water cooler break or group lunch. You can get a surprising number of leads this way.
You think wrong

100TB SSD from Nimbus, https://nimbusdata.com/products/exadrive-platform/scalable-s...
Progressives in the city are quick to demonize Breed for calling out that the proposition doesn't add any kind of accountability to the funds. Yet, I bet if the proposition added a 1% sales tax, or general city tax applied to all residents, suddenly those same progressives would go silent.

It's so easy to sit on your butts and complain that Dorsey and the Collisons aren't doing more to help the homeless, but then to not call out SF's shitty non-profit grant system that makes the current funds hard to trace. Trust me, every single person in this city would be all over a concrete plan to fix the problem. I just don't think taxing the biggest businesses is going to do anything except make it more expensive to run your business in SF.
I literally spit on my keyboard:

A yes vote is a vote in favor of authorizing the city and county of San Francisco to fund housing and homelessness services by taxing certain businesses at the following rates:
0.175 percent to 0.69 percent on gross receipts for businesses with over $50 million in gross annual receipts, or
1.5 percent of payroll expense for certain businesses with over $1 billion in gross annual receipts and administrative offices in San Francisco

If your business is low margin, high gross collectibles, this will KILL your business.

Transaction and retail companies will get murdered.
Get Your Free Copy of Paul Allen's 'Idea Man' [pdf]
> In terms of women's participation in the workforce the communist states were far ahead of the West. Not sure how that came about.

The liberation of women of all social classes in capitalism from the subservient role as an “instrument of production” in “bourgeois marriage” and/or coerced into a system of “prostitution both public and private” was called out as a natural consequence of Communism in the Communist Manifesto.

So, it's quite easy to see why it would be something Communist states would want to demonstrate success at, and when the State directs work, it's not hard to control relative penetration in the workforce to suit the goals of the leadership.
I would prefer to get the information in the form of a detailed breakdown at the end of the year of what my share of the taxes paid for.

"That police station cost $X million dollars" is too abstract for me to be able to understand without doing additional research. "You personally spent $X.00 funding libraries" is something that I can wrap my head around.
Being litter with tools is not necessarily a bad thing. A tool is a modular reusable component that acts a building block for something more complex.

Consider Netflix. They are big open source contributors to the data industry. Many of their tools interest me because I can see their value outside of Netflix. Uber on the other hand is solving esoteric problems with esoteric solutions.
Is this a "works as designed" system? Meaning: designed to get exploited...

FTA: "Bernhard, however, said that although voting machines may be locked when they are stored in the county clerk's building, they are left unattended for days at polling places—high school gyms, churches, and community centers—prior to elections. "

I mean, your honor, she was just asking for it!
Of course there is

And anything you could fit into, basically, one well cooled room is not "Big" anymore, sorry to tell you that
They block port 25, but secure ports are usually open.
At $50 a month begging will easily cover rent. I embrace your reductio ad absurdum. If housing is cheap enough even people with serious substance abuse or mental problems can afford somewhere to live. The lower rent goes the better because even in San Francisco neither junkies nor the insane are a majority of homeless.

Hong Kong has really, really high rent but you don’t see people sleeping on the streets because shitty housing isn’t illegal. You can get a bed in a shared room. I wouldn’t want to live 18 to a room but it beats sleeping on the streets.

This is all about property owners zoning everywhere so cheap housing is illegal. Just making flophouses/single room occupancy legal again would make large improvements in the homeless situation.

Make building housing legal again.
I still find that possibility better than most others. However emergency recovery codes seem to be an accaptable tradeoff on both sides.
We don't believe it does. ISPs will only see encrypted traffic (a VPN tunnel to the gateway) so it's unclear how they will figure it's associated with a server.
Fine, take them with you. Can they code too?
It's very strange to see a tax written against gross income, not net income. When did this start becoming a thing?
That was super interesting. Thank you for commenting!
I remember meeting one of the technical cofounders of SpankChain the weekend of their ICO. He was very tired but excited to be done with the project and onto his next ICO idea. He was adamant about not having his name attached to it. It didn't strike me as a very serious project for that reason, among others.
Vermont. 60/6 for $100/mo. And I’m a lucky one. I have friends with 3mbit dsl and there are pockets of dialup
Isn't a flat tax rate already "proportionate to size and income"? What's the justification for higher tax rate for the rich? I agree that their wealth depends on public infrastructure, but I'm not sure that their level of dependence is higher than us.

(I'm asking as a proponent of progressive tax rate, just not for this reason. So I'd like to clarify)
There's shell curses (https://www.ibm.com/developerworks/aix/library/au-shellcurse...) that is very similar to graphics programming on those machines, minus the sprites. You can even do opengl programming: https://github.com/nrdvana/CmdlineGL .

There are some python shells around (the developer of one posts here) that might make for a better experience than bash though scripts though, either way they'll learn some real world tools.
I'm not really a fan of the entitlement attitude of the rich where they expect the roads/legal/payment stability without paying the appropriate taxes to support the infrastructure.

I mean, it's not like infrastructure isn't decaying or anything...
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Professional classical singer here. I'm personally glad that I don't have absolute pitch, or at least not any version that is mostly focused on A=440 Hz, because as an early-music performer, I regularly have to sing at A=415 (for Bach and other Baroque composers), A=430 (for Mozart on classical-period instruments), A=440, and even A=465 (for Monteverdi) at times. And occasionally at other pitches. And with varying temperaments.

This discussion doesn't seem to be acknowledging how many pitch standards there are that are still in common use, and even in increasingly-common use due to the original-instruments movement.