skysight-inc/HackerNews huggingface dataset:
I think the author of the article hasn't really grasped the concept of option pricing. You are not calculating an 'expected value'.

The whole point of the theory is there is a correspondence between a 'no-arbitrage argument' and calculating an expectation under the 'risk-free' measure. The mathematical operation of expectation E is only a tool. This link between no-arbitrage and martingale theory is called the 'Fundamental Theorem of Asset Pricing'.

There is a nice (basic) explanation of this idea in the book by Baxter and Rennie "Financial Calculus" where they compare the 'expected value' approach of a bookmaker and the 'no-arbitrage' approach.

For a more advanced explanation, you can have a look at the book by Delbaen and Schachermayer (2006).
Demining organisations already use mine rollers in situations where they make sense. As I said, they use a layered approach, with mine-rollers, vehicles, sniffer dogs, etc used as the circumstances require it.

The problem with communities doing it themselves is it'll give them a false sense of security about the safety of known minefields. This could potentially increase the number of mine-related injuries because far more people will attempt to live in or traverse known minefields which they wrongly believe to have been cleared yet which still contain roughly half of the original mines.
The comment about the social network for pet owners made me think of this, which actually turns out to be quite a good idea I think:

http://abovethecrowd.com/2012/11/13/our-most-recent-marketpl...

"DogVacay is an online marketplace that links dog owners with passionate dog care providers who open up their own home as an alternative to the traditional cage-oriented kennel."
With S&R being off by a meters or two generally isn't a problem. With landmines drawing the 'safe' line one meter too far to the left can be deadly.
When hyperloop was first mentioned I considered the criteria required and worked on a matching result. I came up with something that deviates from later info by nevertheless I came up with something that matched.

Working on the principle that the speeds and efficiency mentioned means it has to avoid the friction of travelling through a medium. Since he had said "not a vac tunnel" I set my mind considering how the problem could be solved without relying on a vacuum. I figured, 'why not move the medium as well?'. Making a tube train travelling in a fluid medium would be interesting. Make the inner surface of the tube a hydrophobic surface. Use solar power along the length of the tube to accelerate the liquid. The speed would increase until the energy lost through friction with the sides reached equilibrium of the solar acceleration. If you can reduce the surface friction sufficiently, extremely high speeds should be possible.

Comparing against the checklist you did, a Hydrophobic torus full of high speed liquid gets a fair number of hits. The same aspect applies of energy storage as kinetic. It's a better match for 'ground based' but The same ground based aspect means it would get in the way. Building the liquid filled thing would be much easier, possibly implementable at smaller scales initially.

Mostly I think this just goes to show the interesting ideas you can come up with when given a set of constraints and a goal. I seem to vaguely recall a Mike Abrash anecdote about VGA fifos that applies here too.

I think I'd be a bit disappointed if it is a Lofstrom loop(but that's what it likely is) unless there is some significant innovation extending the idea. It's just like a vac tunnel with cool inertial skyhooks.
One of his many companies is bankrupt, as a ruse to avoid paying money he owes.
What you should know about IPv6
Thinking as a farming peasant, perhaps your child is probably worth less to me than my sheep? Only one is going to feed my family and keep me warm.
Maybe you were thinking of:

http://news.bbc.co.uk/1/hi/3437019.stm
WTF is with the phallus symbol race for biggest buildings around the world.

How about a contest for the least warmongering nation with the most free, productive people?

Denmark? Norway? Costa Rica?
What bothers me is incompetent people who cause me to waste my time. This is what you are selling to your clients: portions of life you might use for something completely different. Portions you'll never get back. So, yes, dealing with incompetent people is a huge bother (on the other hand, dealing with people not in the know but who are willing to listen is completely different).
I'm in a similar boat. I'm not "senior", but I am skilled and have plenty of experience with a successful start-up and a top digital agency AND I am skilled in multiple languages/platforms. I constantly get calls, emails and stalked on Twitter and LinkedIn by recruiters. It's a real hassle...

However, now I am on the market (at the worst possible time of the year). Logically, a recruiter would be the best person to go to for work, but my relationship with recruiters is tainted, and it appears that there are a lot of good companies that simply won't deal with them.

Christmas isn't the best time to be looking for jobs, but even following all the rules won't necessarily get you noticed.
Saving Tweets to MongoDB using Java
What you don't understand is that mined areas are typically marked off, which is why it's children who are most often affected because they're more likely to ignore warning signs. Nonetheless because most people stay away from those areas the risk is lower.

When you demine an area, you signal that it's safe for the population to move in, which means that if you haven't actually cleared 99% of the mines you're increasing the possibility of a person stepping on a mine. That's the reason the UN demands such a high clearance rate before an area can be declared safe for humans to live in.
WW III?
Part of the problem is that domain registration and DNS hosting are usually conflated, when they are in fact very different things. Domain registration is more a legal discipline than a technical one - Especially when you begin to go into registering international tld's.

For registration, I would pick a trustable company to run things for you - Small and personal is ideal. The DNS hosting, on the other hand, is probably served best by a big company with solid infrastructure - Such as the place where you host your main hardware or with a dedicated dns hosting service.
As the founder of a startup myself, and the recipient of funding, I believe it depends entirely on the nature of your business, and most importantly the market that the business is entering into.

Each new business must consider

a). the critical mass they need to achieve to reach a market and
b). the velocity they need to run at to meet that time of opportunity.

These 2 considerations will often determine whether externally (VC or Private Equity) funding your business is necessary. If you attempt to enter into a market place where all of the players (new and existing) are heavily funded, you will probably fail to penetrate regardless of the quality and performance of your product.

On the other side, if you gather funds to support your business in a field that has limited margins, or is slow growing, then you may fail to achieve the returns that your investors are looking for.

So - it all depends - but you need to make a decision based on the facts in your business plan.
ssmoot says he invented this, which is eminently readable but feels like being too leaky (what's the name of the deprecated gem that does that to AR already?):

1) User.where(:age.gt => 5)

ssmoot says this is better:

2) User.where { |user| user.age > 5 }

SQLAlchemy does it this way:

3) query.filter(User.name == 'ed')

which looks so much like how AR3.0 + ARel does it (and seriously AR::Base should delegate [] to arel_table):

4) User.where(User.arel_table[:age].gt 5)

and here's squeel's way:

5) User.where{age >= 5}

FTR, Django QuerySet does it by parsing kwargs (convention is double underscore => dot, which allows to 'call' methods on fields (pub_date__year) and joined relations (group__name)):

6) User.objects.filter(age__gt=5)

From a 'user' (i.e developer consuming the API) perspective I really like 1 and 5 because there is no redundancy (with which 2 is full of). Still when you're join()ing, you have to make ambiguous things explicit, and in that case 1 falls apart (you're not going to write :group_name, are you?), so while 5 is nice and allows for niceties like group.type, I am perfectly content with 4 because it's both stock Rails and quite readable, it's just that the full sized User.arel_table breaks the reading flow, and a bit redundant in the trivial case.

I'm not fond of stringifying stuff as resorting on parsing makes it less dynamic and more prone to abuse, and it we write strings we might as well write partial SQL.

Indeed ActiveSupport is a bad example because it extends by monkeypatching, but implements stuff that always apply (all strings are potentially camelizable, always, ever, and arguably integers can always be qualified with units) whereas Symbol#gt is nonsensical outside some specific scope.

The refinement situation is terrible because it performs poorly, leaks badly and makes things terribly inconsistent, especially with blocks passed around. I can't even begin to fathom the consequences of a block being called on an unexpected binding.
Even if there were unpaid bills?
did anyone else notice that the two pictures show different buildings?
Yes, Black-Scholes is a good benchmark model, i.e., something to compare other models to. For example, through the implied volatility surface.
Nokia releases maps app for iPhone and iPad
We have a similar system here in Denmark, and a domain costs about $10, so the price is not because of the system.
Only if you assume totally flat terrain and 100% probability of the Mine Kafon detonating each mine it passes over, neither of which are likely.
>The ideas people have had, just trying to "figure out" what the hyperloop might be, are very interesting and diverse.

Got any links to such ideas? I would love to see what other people have come up with.
China also has entire empty cities, some newly constructed:

http://www.bbc.co.uk/news/magazine-19049254

http://www.dailymail.co.uk/news/article-1339536/

So one has to ask why.
Elon Musk is Leonardo Da Vinci of the present times. More power to him.
> I've become scared of large codebases in dynamic languages.

Fair enough. It seems to me that if an application has high performance demands and is expected to be in service for years, it should eventually be rewritten in a faster language. I find myself designing/developing programs in Python because development is so fast, then rewriting the result in a faster language after the design phase is over.

The rewriting phase is basically a translation, not a redesign. In most cases I know exactly how the program should behave, so there's no design taking place.
That would be much harder to evaluate. Measuring tall things is pretty straightforward.
I think this and Parse are cool.

This looks better for getting started quickly if you have a Core Data app. It should also be easier to customise although Parse can do more for you (user registration is built in) but you need to be on the paid ($199/month) package to use your own branded login I think.

Also I can't quite tell but it might be possible to take the Heroku buildpack and deploy it on your own servers so i think you would have easier options to migrate away without a rebuild. This is worth something to me.
Be careful with that. You have to watch out for good companies being bought out by assholes. For example, I was a happy Speakeasy customer for a long time, but eventually Megapath bought them out. The Megapath CSRs were the least helpful people I have ever talked to and their cancellation process is deliberately broken too.

So I'm right with you on avoiding doing business with assholes. But just remember that a good business can go bad, especially if they get bought out by complete and utter assholes. Like Megapath.
Learning Principles for Improving Your CSS
How are people supposed to shear those sheep, or take care of them during lambing/when they're sick, or to feed or water them, if they can't actually enter the pen? It seems to me that sheep penned in a land mine field would either be useless, because you couldn't go near them, or worse than useless, because they'd be a temptation to enter the dangerous area.
Of course you're calculating an expected value. If the expected value of an option isn't its price, what is it?

The no-arbitrage argument is another way of looking at it, but the two methods are equivalent. In particular, if the expected value of an option is higher than its price, you should buy the option - and if it's lower, you should sell it.

With just one transaction this would be statistical arbitrage rather than pure arbitrage, but if option prices regularly differed from the option's expected value, stat arb would be a fine strategy.
I can see white privilege, but male privilege is pretty much a joke. Women have all the advantages, and even before the women's rights movement men were only given certain advantages because it was necessary for group survival. In the 21st century, being a woman is much easier than being a man.
Python is absolutely great for prototyping. And I like it for smaller, more self-contained apps where you don't have to worry too much about mission creep. And of course, you have sqlalchemy.

But all in all, it's more the safety you get from static typing I'm interested in than a pure speed boost. Though pylint is not too bad, it's still not the same.
It's true for Windows RT indeed, but the article was explicitly referring to Windows 8.

And AFAICT myself WinRT has always been presented as a new API designed for new kind of Windows applications (i.e. Windows Store apps). It doesn't make the other APIs obsolete in any way for the other kinds of application, just like the CLR didn't force anyone to write managed code. See this chart from Build 2011 for example : http://1.bp.blogspot.com/-uUSc-JjjBDs/TnWkasRU74I/AAAAAAAAAV...
They actually cost $15 USD/yr. In fact, the price has decreased over the years. [1]

[1] https://registro.br/dominio/valor.html
It must get tedious listening to Canadians go on about it, but this is about what we pay in British Columbia for people with full incomes. The coverage is pretty good, including 'out there' stuff like acupuncture. We top it up with private coverage for full dental; that costs the company about $100 to $200 per month per family. The service levels are good to excellent. This is all pretty consistent across the country, so talk to your travel agent.
Israel uses goats to clear Syrian mines in the Golan Heights

That would seem cheaper here too, and the still-alive goats can make milk.
I was joking with some friends when Ignite100 started up again this year I was going to apply with "It's going to be a social network, but for pets!" as it was a funny idea over beers. Couple of months on I feel like I should have had a go at it, people love their pets, Facebook frowns on pets profiles but loves people using their open graph and associated tools, so there's a dynamic there.
The key point you are glossing over is: under what probability measure?

You are calculating an expected value in the sense of 'mathematical operation E' under some measure not in the sense of 'I expect the price to be...'

I don't want to pick a fight or anything, your product datanitro looks nice and it's cool you are writing articles on the topic.

Where did you learn this stuff from?
My friend had this idea about a year and a half ago. Any programmer who gets involved in 3D printing does, because the software is so primitive. It's like random unmaintained tools you download for Windows only with Windows 95 UIs. Or AutoCAD, which does 1000x more than you need and is hard to learn.

The main problem I see is that development is going to be hugely expensive. It's an inherently complex problem domain. You need people who know hardware and 3D modelling. And you need people who can design UIs. There's a reason AutoCAD costs so much!

Someone will do it eventually. But it will be interesting to see how they are able to make it affordable and still make money. I know about Tinkercad but don't know what their plans are.
Quantum cryptography done on standard broadband fibre
Top 20 Startup hubs
As a pair customer since 1996, I concur, they're awesome. Hosting isn't really cheap either, but IIRC they've always been in the top 5 on site availability every single year since I've been using their services.
I agree there.

Like many in the industry I have a love/hate relationship with Microsoft, as many other companies.

This has to be a decision from the Marketing department on the engineering teams.
I agree. Demining for human/civilian is harder than just to clear a way for a military purpose. The thing with projects like this roller is that it actually takes money and time from the things that really work, like sniffer dogs.
Aww I must have touched a nerve, how cute.

Don't cry okay you can still continue to use your crappy gmail. No one cares
Portugal, and most of the mainland European countries.
You're intending to be counter-intuitively insightful, but there are few scenarios in which a sheep is more valuable than a child. You could sell a child for more than you could sell a sheep. The children who are in the most danger from mines are past infancy, and that is when children begin to be worth more than they cost to maintain if you aren't sending them to school.
Simple And Common-sense Guide To Personal Loan
I've actually had a similar struggle with the incessant but spammy recruitment emails, that I was able to fix almost perfectly. In the "Summary" section of my LinkedIn[1], I have a sentence that says this:

"If you wish to contact me, please put the word 'Waffles'
in your message. It sounds silly, but it lets me know that
you have taken a little time to asses my profile, rather than
mass messaging people based on a keyword search."

"Waffles" will never be added by coincidence, so if I ever see that in the subject line of an email, I know that the recruiter has actually read my profile, and took the time to write a custom email to me. If it doesn't have the word "Waffles", I just ignore/delete it. It has dramatically improved the quality of emails I get from this vector

[1] http://www.linkedin.com/pub/joe-cortopassi/24/76b/5b9/
Startup Genome Ranks The World’s Top Startup Ecosystems
Recent version is v2 http://arxiv.org/abs/1210.0530v2

Summary:

1. Write programs for people, not computers.
2. Automate repetitive tasks.
3. Use the computer to record history.
4. Make incremental changes.
5. Use version control.
6. Don’t repeat yourself (or others).
7. Plan for mistakes.
8. Optimize software only after it works correctly.
9. Document design and purpose, not mechanics.
10. Conduct code reviews.
In an area where £10 might be enough money to pay for a doctor's visit for a deathly ill child, or feed a family for a month, you'd probably get a lot of people risking their life and getting killed to get their hands on just one landmine, which strikes me as a singularly inefficient and cruel way to try and clear those fields.
http://economictimes.indiatimes.com/news/news-by-company/cor...
I feel your pain. It's hard to find the balance between saying what problem you're solving vs how you're solving it.

This is what I suggest you do. It might cost you ~$50 or so. Go to a coffee shop like Starbucks and offer someone to buy them their coffee in exchange for some feedback on the "new website you're building". Try to find normals (not super technical folks, unless that's your target audience). Explain to them what you're building, let them play with the site (hey this is also a nice UX test), take your notes whatever but in the end, ask them to explain to you what your site does. Maybe if you do this with 10 or so people you might see a pattern emerging (bonus: get pretty good feedback on product too).

I am not saying this will work, but this will not be a waste if the people you talk to are anything close to your target audience.

P.S. What Emmett is saying above is to give him a one sentence description that brings him as close as possible to cloning your site. Also, do you really need "externalize opinions"?
Another AWS Price Calculator, but nice and visual
Turns out sheep's will run toward whoever takes care of them.
Show HN: African Biz/Tech News HN Style...
Reddit Is Literally Writing Our Laws Now
On the other hand, when Netflix comes 1 year later, they might just buy you. If not they will probably have a hard time adapting to regional issues. Italian consumers are probably subtly different to US consumers.

This friction also works in reverse, though. As a startup you have a hard time to get the deals with the movie industry, while Netflix already has the connections.
No - if you look in the EULA, there is a clause which stops you publishing benchmarks, which is just wrong on so many levels.
Keep your session open using tmux / screen
Multiplex virtual consoles are the way to go for keeping sessions open.
My favourite solution so far was to use plants that turn red near mines, thus pretty much creating red circles around their location. I read about it few years ago in a science magazine, but somehow the research seems to have died.

http://en.wikipedia.org/wiki/Demining#Plants
"For example, a social network for pet owners. It doesn't sound obviously mistaken."

It is not obvious so much that actually there are several social networks for pet owners with apparently hunderds of thousands (registered) users. There is one even in Hungary where I live (only 10million people live in Hungary), but here are some english sites also:

http://webtrends.about.com/od/socialnetworks/tp/pet-social-n...

Yes probably this is not a huge market, but some people make some money off of this.

So, yes, it is totally not obvious what startup ideas are good or bad.
Regarding updates - yet...
>- Gorilla arm simply doesn't exist.

That's a pretty strong statement for an anecdote of precisely one person.
Yes! "Plants... are said to turn from green to red when they come in contact with explosives in the soil. " Read it some time ago and thought it was brilliant.
Can you use IB when you have gone for custom UI components rather than the UIKit ones?
You mention a good point.

I think consulting requires a character. If you are 20-something I really doubt it's going to work very well.

Unless you have a history of extra-ordinary achievements which sets you apart, in which case you probably wouldn't have or want to do consulting.
Any success the US had has nothing to do with using the obsolete Imperial system. Glad you were given the opportunity to do a little bit of "USA, USA, USA" fist pumping though.
Loading takes 7 seconds...
Or do 120 KPH and just cut the numbers in half.
Afghanistan is not exactly flat land and mines are not exactly placed in the open field and this tool is not exactly as heuristic as my robot vacuum cleaner and this is not exactly anywhere a valuable addition because even after 100 years you cannot be sure they cleaned an area 100 percent.

I was an SFOR-soldier in Yugoslavia and I saw several crippled kids sitting next to a football field watching other children play in tears while others were reading superman comics which informed them about not touching mines and how they look like. They deserve hope and not a joke ..
Hey guys, Bob from Goatse here. For the record, there is no email spam blocking on the domain at present.
This sounds like best plans for computing in general, not just scientific computing
Unfortunately Aresa Biodetection, the company behind that, stopped all research into their strain of the thale cress plant for landmine detection. I would guess that they hit a dead-end in their research, perhaps they could not make it reliable enough.
This reminds me of Awib ( http://awib.googlecode.com/svn/builds/awib-0.3.b ), an optimizing brainfuck compiler written in brainfuck that can produce Linux executables (for i386), Tcl, Ruby, Go or C.