skysight-inc/HackerNews huggingface dataset:
> Why do most introductory math textbooks not contain solutions?

I offer a couple of Free texts, one of which is pretty popular (http://joshua.smcvt.edu/linearalgebra/). The answers, completely step-by-step solved, are available. I can give you two reasons.

1) Preparing good questions and giving answers is about half the work. On my page you'll see that the book is 500 pages and the answers are 400 pages.

And it is not the half that is fun, or that gets you credit. I find that compiling the answers greatly increases the quality of the book because I keep going back and adjusting the presentation, etc. But others don't think that. Rather the opposite; I have been told that it is work only appropriate for grad students.

2) I have gotten a fair number of emails along the lines of "I'd like to adopt your book but since anyone can download the answers, I cannot teach out of it."

It has not in the past proven to be a fruitful strategy for me to inform the email writer that the first thing any 2018 undergrad does on getting a text asignment is to google for the answers pdf, and that those students always succeed.

So one reason to not provide answers is to get more adoptions. This ties in with (1) because my five year reviews are not impressed that random self-learners find the text useful. They ask about adoptions.
نَحْنُ الغرباء/ ذكرى لعيبي – شبكة الاعلام في الدنمارك
It’s interesting that you mention homeostasis, as this was actually something I used when I went on a big weight loss kick (70 lbs in five months) eight years ago. For what it’s worth I’m the same weight now as when I finished.

How I used homeostasis: I set myself a very rigid fixed diet and regimen - 1200kcal/day, almost all protein and green leaf vegetables, tiny portion of complex carbs (rice or potato), 45 minute run, 15 minutes of core training. Same routine, every day, same heart rate target (130) for the run.

The upshot was that my graph followed a really beautiful curve - to start with, weight fell off at a crazy rate - and as time went on it slowed, and slowed, and stopped. I then increased my calorific intake slowly over the same period I’d dieted for, while maintaining the regime.

I found the weight my body wants to be, which is pretty much smack in the middle of the healthy BMI range, 14% fat, and now maintain that without any real effort beyond noting when my weight starts to rise because I’ve been junking out on sugary crap, and cutting out the crap until I’m back to normal.

Agreed re: eating out - and the thing that had the biggest effect for me I think was cutting out booze. So many calories in a pint it’s not funny.
> Eating some carbs after cardio is important.

Why?
Or a crock pot.
there is no raw network access from JavaScript in a browser for precisely that reason
Not even writing text. The interface is just terrible for that.

Obviously a day may come where people plug their phones into docking stations that are equipped with a keyboard and a monitor, but it seems likely that we'll stick to lightweight laptops for a long time.
> You can be on a keto diet and gain weight.

Yes, but is it fat or protein? If an adult human male weights 203 lbs at 25% body fat undergoes a transformation and goes to 250 lbs at 10% body fat, I think you'd be hard pressed to call him overweight. I think the NFL would like to have a talk with him.
One reason might be that exercises that ask for proofs often have several correct answers. It would probably be just as confusing to a beginning student to come up with a proof for some exercise and then see the author take a completely different approach in the provided solution. The student still wouldn't know whether his proof is correct or not.
All probabilities - chance if failure vs chance of getting stuck, would be interesting
The question is if we'll live long enough to experience the time after those magical 20 years....
It might imply there is something more mystical to our existence though. In the infinite space it happened exactly once.
The http://digitalaccessibilitycentre.org/ website is awful. Efforts like this give accessibility a bad name.

Accessibility isn't about designing websites that are exclusively for special needs people. It is about making websites work for everyone, whatever device they are on.
Part of that ethos is sticking to convention.

So what is so awful?

The navigation is awful. It changes from the homepage to one of the other pages.

Their use of mini-font sizes is also a bit silly.

Even the URL structure is a bit silly, nobody needs to have index.php in a URL to make it mysteriously more accessible.

Their headings have line heights that mean 2-line headings are mangled together.

If you run a outline on their pages the content does not reflect what is shown.

I would be embarrassed if I worked with these so-called accessibility experts, their efforts sideline what accessibility is about. Cringeworthy and awful!!!
Doesn't redis by default have recovery via the filesystem enabled?
A world-class athlete with a near superhuman physique may be the perfect definition of an edge case in this situation.
Yes! The three body problem trilogy.
So you're saying that you can consume 5000 calories per day, only burn 2000, and still lose weight. Have you considered submitting this to a scientific journal? This changes our entire understanding of the laws of physics. Faster-than-light travel actually sounds possible now.

Or you're lying, and also making anyone who did gain weight on the keto diet feel worse about themselves and give up on losing weight altogether.
Economics of Serverless
I’d love to see the intercept publish the equivalent for China, Russia, etc. It feels the press has very overindexed into the NSA.
The scrolljacking on this article is absolutely insufferable.
Tcl supports this, and many systems use it: https://www.tcl.tk/man/tcl8.6/TclCmd/safe.htm
So you are disputing the fact that you lost weight by consuming less calories than you burned? I'm doing me , thanks for the concern!
Yep - I had zero problems with fixed price on ebay with over a hundred listings. I sold my entire comic collection (over 2500 books) over the course of a year. The best compromise between auction and fixed price is setting fixed price with a "make an offer" option - then set the make offer option to reject all the low ballers automatically. :)

I avoid auction like the plague.
NASA doesn't want high zoot. (Love the word.) It doesn't fly if it hasn't flown before.
> probably only about 20 years away

Down from the '25 years away' it has been for the last 50. I'm not being facetious, I actually think that's huge win and we should all be happy.
I hope this means the developer tools themselves will actually become accessible. As a blind web developer running Linux and Orca, bunches of things have been broken for a very long time, to the point where I'm considering switching to ChromeOS and running Linux in chroots/containers just to get a better set of web development tools. I'm glad that they're empowering developers to create accessible websites, but if blind/disabled developers were empowered to develop on equal footing, then that'd be another way to achieve the same goal.

As one example, I can't navigate the network inspector via keyboard in any meaningful way. Firebug used to have this nailed, to the point where you could even enable an accessibility mode (though arguably accessibility mode should have just been the only mode.) And yes, I'd happily file issues for this and half a dozen other things, but at some point I actually have to do my job, and in this case that might mean jumping ship to a browser that seems more accessible.
And only another 20 after that, of course. We should have strong AI by that time as well.
It will be the perfect power plant for my flying car.
A relatively unique name coupled with an alternate domain seems like it would solve roughly the same problem, no?
> Splatoon 2

I'd argue that this is the essential game for the Switch. Most fun I've had in 30+ years of gaming.
Cars detection from satellite imagery with RetinaNet
> In fact, our current value and belief systems would not recommend such an expansion either.

This just isn't true. There are current value and belief systems, even ones held by people with a relative large amount of political and economic power, that do in fact recommend such an expansion (someday).
Edit: Nevermind, stupid question. Thanks for the corrections!
Dasani and Aquafina are quite literally tap water, filtered, but not boiled, then bottled with a trace amount of salt added.

So for most people with safe municipal supply it's a complete waste of money no matter what Coke's marketing might try to imply.
I should have thrown a license on this, but it was really just a personal project and never meant it to be released into the wild (GitHub was just a place to store the code)... I suppose I should go back and update this, add a README, and a license.
Robots don't get paid?
Thanks for that suggestion and screenshot!
The cost of failure is rather high. In 2007, China used a missile to destroy one of their satellites:

"This event was the largest recorded creation of space debris in history with more than 2,000 pieces of trackable size (golf ball size and larger) officially cataloged in the immediate aftermath, and an estimated 150,000 debris particles.[24][25] As of October 2016, a total of 3,438 pieces of debris had been detected, with 571 decayed and 2,867 still in orbit nine years after the incident."

https://en.wikipedia.org/wiki/2007_Chinese_anti-satellite_mi...

That being said, they are researching the use of lasers to clean up space debris:
https://www.sciencedirect.com/science/article/pii/S003040261...
Generic SQL engine in Elixir that uses generic data extractors
Making everything fixed-time, no matter how fast, would actually have the needed effect, random noise can be statistically removed.
US supercomputer knocks out Chinese champ to reclaim HPC crown
> There is no reason to believe that species want to colonize the whole Milky Way.

There are definitely reasons to believe that.

You certainly don't want to be in a galaxy where someone else does it first: if you can't coëxist with them, you're probably going to be wiped out.

Large-scale projects like Dyson spheres would, I imagine, require vast resources taken from multiple solar systems. So even if you're not colonizing every star, you're probably mining from many of them.

Anyway, just a couple of reasons that spring to mind. Given our data set is exactly one intelligent civilization it's hard to draw conclusions, but expansionist pressure seems to be the safe assumption.
The triangle solution absolutely does need to keep track of which side is at the bottom, or you'll end up with all the weight on one vertice.

Agree with the perimeter consideration.
Leptin, and Insulin are also important as well. Insulin is "relatively" easy to lower by reducing carb intake, especially simple sugars.
100% agree with your two, much needed, comments.

Losing muscle mass is something you should always try to avoid (tolerable calories deficit+right amount of proteins+exercise). Muscle mass is hard to gain and serves a purpose in everyday life.

The next step on the author's journey to a healthy lifestyle should be to focus on macros and on the kinds of food he eats too, since both have implications on his body composition and general health.
Jerry Seinfeld’s Closed Door
AI all the way: US supercomputer is now the world’s fastest
Yes, I really enjoyed that analogy. It's important to bear in mind that analogies don't prove things, they are just illustrations. What I particularly liked is how he did a very good job at backing it up with different studies that support it. As I was listening to the book, pretty much all the questions I had he answered in a very methodical way.

I've started trying intermittent fasting and low carb/high fat so far I'm amazed at how much energy I have. Still early days and I have a few old habits to kick. But it's definitely going in the right direction.
For those who can't access theintercept for a variety of reasons: https://archive.fo/c0vWe
but nosql didn't win? It did find some applications but it didn't really take over the industry or anything.
You can! Just hire a teenager or landscaper. :) Otherwise get a ride along mower that you can put a plow on in the winter. Pretty simple. Also depending on your car you can put a plow on it too.
Crock pots and slow cookers are essentially the same, as far as I know. The only difference I can remember is that one is a metal bowl, and the other is a ceramic bowl.
And wouldn't we then send frozen egg and sperms, robots taking care of everything once the ship gets close, the humans get education etc. from robots
I have admit it's one of the nicest math books laid out in LaTeX, it's a pleasure read.
Lost Purposes
If you manage to gain 50lbs of muscle just from keto and nothing else, yes you should be in the NFL.

But you should realize gaining muscle is actually difficult, and you should realize that it's basically impossible to lose weight and add substantial muscle at the same time since one requires a calorie deficit and the other requires a calorie surplus. Possible, but extremely extremely difficult and time consuming.

There's a reason professional athletes go through bulking/cutting cycles. No one is accidentally putting on 50lbs of muscle just by switching to keto.
We are currently looking for smoke signals. We need to find a loop-hole in quantum theory and exploit it to send and listen for signals that wont be affected by the distance between the sender and receiver.
No way! :) I think aquaponics gained a lot of popularity around 2011, which is when I became aware of it and started hammering away at ideas. Maybe it had something to do with that rapture prediction at the time? ¯\_(ツ)_/¯

Yeah, there's certainly room for more small-scale aquaponics products. Possibly larger scale, too. I had this foolish mindset that if my idea wasn't 100% original then it wasn't worth doing. The reality is that even the biggest of companies that exist today weren't the pioneers of their core products, nor did they necessarily innovate any faster than their competition.

Thanks for the encouragement, and I would say the same for whatever ideas you shelved. Maybe we'll have to join forces some day. ;)
Micron Ramps Production of GDDR6 Memory for Nvidia GeForce GTX 20 Turing GPU
> PMCS

Yep, haven't heard that acronym since I ETS'd ~6 years ago.
Few months ago, I migrated to Hugo after several years on Jekyll, and I'm so glad I did. While Hugo does have many flaws, I love it for its simplicity, which is also the reason why I chose static website generation over Wordpress or CMS.

I still like Jekyll and I might use it for blogs that has more complex requirements for building the site. However, my blog is simple and I just wanted to generate my site quickly (and boy is it quick). Also using the template was very easy, and I was able to migrate my Jekyll theme to Hugo without too much trouble.
Using Webpack to bundle your Workers modules
What about going the other way - gaining weight? Does anyone have tips or reccomendations on how I can gain weight. I'm 6'3" and 160lbs and have always wanted to gain weight but I struggle with consistently eating 5 meals a day.
It is a useful guideline for the general public. If it says you're overweight and are sporting a beer belly, you likely aren't an edge case.

Better measurements exist, but for most collecting the data needed is complex (and the impedance measuring ones aren't reliable). If you have a suggested alternative I'd welcome reading about it.
How to Build a Great Product – Lessons from Snapchat, Slack and Instagram Pt.1
Maybe but it was still stupid marketing too. Demanding all Core i* CPUs to be bundled with SSD would have been a brilliant move. Not enough to turn the ship around, but steering in the right direction.
Guardians from Hell-completely legal system for undermining rights of elderly
Nice whataboutism.

While I agree China/Russia has the intent, but do they have the ability to conduct wiretapping on this scale? It sounds like the US is uniquely able to do this since so much of the internet's backbones/services reside here.
What would such evidence look like? I don't think we can consider brain size definitive, since it's possible for humans with about ~10% of our normal brain volume to function normally. There seems to be no evidence for tool use, much less advanced technology, but again, what would these even look like after so many millions of years? I think about all we can say is that no prior species changed the planet in the same fashion we have.
The obligatory XKCD: https://m.xkcd.com/678/
This is like boyfriend or girlfriend as a service.
Nokia/Symbian vs the Open Handset Alliance/Android, all over again?
Makes me wonder that Matt Dillon, Theo De Raadt, Linus Torvalds, John Carmack and Bryan Cantrill would have been able to make if they were founders of a company together.
One wonders if a CDN might advertise, "we promise once your data enters our network at our edge locations outside of the US, it does not traverse any AT&T networks while reaching your server inside the US". Same with cloud companies' private networks across regions.
BMI isn't a percent, but based on your height/muscle mass you can have an overweight BMI with very low body fat.
Swarm:

- works out of the box

- has much less overhead in getting something started

- tracks dependencies between services
America can't claim to be near the peak of human culture, freedom and civil liberties while also wanting to be compared against places like China and Russia.

Hold yourself to higher standards if you really are No. 1.
This is the first I've ever heard in my life that intelligent species wouldn't want to spread to the stars. Given the historical impetuous of our species to expand to every even remotely habitable region of Earth, and large support for living off the planet if it were possible, why would you think aliens would be the same? Every single living organism on this planet fights constantly to expand it habitable zone.
Your body is replenishing glycogen stores in your muscles and that happens much faster if carbs are consumed shortly after exercise.
There's a difference between informing someone of your job title (serviceable smalltalk) and actually telling them what you do (likely reserved for a conversation with someone who's demonstrated some interest)
> governments were not actively trying to regulate or outlaw NoSQL

... perhaps they should have ...

> so NoSQL did manage to win eventually.

post hoc ergo propter hoc

I've always been of the belief that the best thing that could happen to a given cryptocurrency is for it to be prohibited by major governments - it would drive it underground, sure, and kill institutional investment... but it would also spur innovation in the areas that are required to make it a truly revolutionary technology.
Besides, books have different levels and audiences. I learned Linear Algebra from three books:

1) Gilbert Strang's "Introduction to Linear Algebra" was great because Gilbert goes straight to intuitions, the proofs are simple, most exercises have answers, but it does not cover advanced material. I used this book for self-teaching. You could probably learn from it with just high-school level maths. Good for engineers.

2) Hoffman and Kunze's "Linear Algebra" was given as a textbook for my first LA course. While it covered some topics that weren't found in many other textbooks and are not really "standard curricula" in many other universities for (jordan normal form, rational canonical form). I found it more similar to a reference than a textbook; it is intended for math majors. The proofs are imho a bit obtuse and it usually introduces topics without much justification. Determinants are introduced early.

3) Axler's "Linear Algebra Done Right" OTOH covered many of the topics in Hoffman&Kunze but the organization and the proofs were (imho) mucho more clear and motivated. Also intended for math majors. No determinants until the end.
Thanks to both you and christophergray. The broken link should be fixed now.
Why only one cup of coffee? Is it the caffiene? Does decaf apply here too? (I work in coffee and often skip breakfast.)
I posted this here because it needs attention, and because I read a similar article posted here months ago. This is sad and sickening.
Supreme Court says warrant necessary for phone location data
That's kind of you; thank you.
In France, roughly 12% of people don't use the Internet - https://www.arcep.fr/uploads/tx_gspublication/State-Of-Inter...

In Indonesia, millions of people say that they don't use the Internet - but they do use Facebook - https://qz.com/333313/milliions-of-facebook-users-have-no-id...

For all of us, it's worth stepping out of our bubble to see how other people perceive what we take for granted.
When I started dieting, I used to spend hours cooking every week. Now, I buy a rotisserie chicken from the store, buy a bag of veggies, pull the chicken and microwave the veggies.

That's my emergency meal for lunch and dinner. I'm on a low carb diet, usually only have carbs in the morning (oatmeal), and fruit throughout the day.
Though I don’t like any of James Patterson’s books, I decided to check out his class since he’s a top selling, prolific, fiction writer. He had some decent tips for banging outlines combined with unnecessary, though briefly motivating antidotes. I suspect the format of these classes are all similar. I’m of the opinion that if you’re in a mental rut, then do anything to get out of it. In that sense, Patterson's class was useful. I am curious if Werner Herzog’s class has any structure.
I looked for statistics on maintenance cost of equipment for male vs female operators but didn't find any, just the un-documented assertions in https://www.equipmentworld.com/men-vs-women-who-are-the-bett... that basically say women are easier on equipment and specifically

Attention to detail
“I’ve always been impressed by how women take care of
their machines” Smith says. “They keep them clean and
don’t leave trash in the cabs. If there was a drop of
oil coming out of a wheel or something small like that
they let you know about it.”

I'd be happy to look at any statistics you can provide that show "equally hard on things".
Show HN: Mock data generator CLI for Swagger3 (OpenAPI 3)
That's generally how I am. I can't be around food because as soon as I know it is there a part of my mind spends all its time thinking about it. I'll eventually cave and eat it. All of it. People sometimes say things like "no one can eat all that X" and I can tell you from personal experience they are almost always wrong.

Even keeping just enough food in my house for a week's worth of meals (I only eat one, lunch) only works in combination with an appetite suppressant, otherwise I'll find excuses to bake bread or elaborate confections or something. And attending any social function where food might be present is extremely dangerous and to be avoided if at all possible.
So we are between a rock and a hard place.
It doesn't have to be lying. It could just be "ignorant, sure of themselves, and loudmouthed". Seriously, the accusation of lying is not one you should make lightly, no matter how mistaken the position being presented.
Can we stop with the "fusion will always be x years away" meme? Fusion is mostly a number of invested dollars away. A big reason why we don't have fusion reactors yet is because nobody invests sufficient amounts into the necessary research. Check this graph http://imgur.com/sjH5r from the old Slashdot interview

https://hardware.slashdot.org/story/12/04/11/0435231/mit-fus...

It's just disrespectful to all the brilliant physicists and engineers who work on the topic to belittle their efforts like that.
I started experimenting with IF about a month ago. My experience has been:

- No obvious impact on rate of weight loss.

- I do seem to be getting better sleep at night.
Drinking coffee is not cheating, as it does not spike your insulin and does not put your body in metabolic state. No sugar and no cream. You’re all good! :)