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dia80

847 karma · joined April 15, 2011

cantspamdave _at_ gmail.com
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dia80··on My Y Combinator experience
Space doesn't preclude customer development. E.g Virgin Galatic pre-selling rides
dia80··on The Man Who Knows Whether Any Startup Will Live or Die
The data mining bias / model risk here is huge. Let's see how he gets on truly out of sample.
dia80··on Making Sense of the New VAT Rules
There aren't any of those. That's pretty much the point of the EU.
dia80··on What the Swiss Franc Appreciation Means
not somewhere someone in internet comments told you to put it
dia80··on BBC uses RIPA terrorism laws to catch TV licence fee dodgers in Northern Ireland
I don't have a TV and I've not had a letter for years. It's hillariuos when people from call centres in India call to sell TV related services. Their script clearly doesn't have that contingency catered for.
dia80··on Hyperloop is making progress
1. The purpose of higher priced classes is to give people who are willing to pay more the opportunity to do so.
dia80··on Hackers with Apparent Investment Banking Background Target Biotech
You mean managing $10+ billion of their own money?
dia80··on Lessons learned from 10 failed startup ideas
It seems the rational approach when the cost of "shooting" is of the same order of magnitude as attempting to conduct market research.

Also to take an example from the article how would one accurately assess demand for a 10 language flash gaming site without building it?

dia80··on Electrical brain stimulation beats caffeine and the effect lasts longer
One of the related articles at the bottom references the paper "Transcranial stimulation of the developing brain: a plea for extreme caution" [1] I would be quite interested in give tDcs a go but the tail risk of making some permanent brain change freaks me out.

[1] http://journal.frontiersin.org/Journal/10.3389/fnhum.2014.00...

dia80··on The hammer-feather drop in the world’s biggest vacuum chamber [video]
I know how this will turn out but my intuition is screaming otherwise.
dia80··on How do you get to write so well in HN?
"It usually takes me more than three weeks to prepare a good impromptu speech."

-- Mark Twain

dia80··on Meteor hits 1.0
Thank you Meteor team - you have done fantastic work, what an achievement. I've had a blast building my meteor hobby site [1]

[1] http://quantpapers.com

dia80··on Uber isn’t the problem; taxi regulations are
Point is they are plentiful - I can hail a cab in minutes but if they become rare I could wait 30 minutes for the 'special' cab to show up.
dia80··on Uber isn’t the problem; taxi regulations are
I have a spinal cord injury (snowboarding) and use a wheelchair as a result of having no sensation/movement below my chest. One of the most annoying consequences is being unable to move around London quickly. The tube is inaccessible, buses are slow and you often have to have a pitched battle with pushchairs.

Black cabs provided a relatively quick/convenient method of transport since they all have a ramp - not without issue but possible to get in one in less that a minute. I've not tried uber yet as I'm apprehensive about the hassle of getting in and out and getting the driver to help stow my chair. People are usually pretty keen to be helpful but it's a bit tricky and their default idea of helping is often counter productive. Also if they don't stop near the kerb you have to get them to move and the passenger side of a car is harder to get in and out due to the height of the kerb.

Black cab resides effectively subsidise my ability to get around so I am somewhat concerned to think they might be 'disrupted' wholesale.

dia80··on You get what you pay for.
I prefer to state this principle as "what you pay for is usually an upper bound for what you will get".
dia80··on ‘Solar’ jet fuel made out of air
Articles claims 20k litres per day from 1km sq. solar farm maybe possible in the future.

At current (retail) prices that's about 10,000GBP per day or 3.5M GBP per year. Doesn't sound like a lot to run a 1km sq. facility...

dia80··on Python for Finance
The SWIG bindings for QuantLib are quite good, no?
dia80··on $1,000-a-day miracle drug shocks U.S. health care system
My questions: 1) How much did it cost to develop? 2) How big is the potential market? 3) How much money will it save society overall for each person cured?
dia80··on Top Inventions at Browserling
Sorry, that explains it... thought this was your marketing site.
dia80··on Show HN: Bitcoin derivatives – call and put options
History says if you send any bitcoins to derivabit you will duly be relieved of them by some hacker.
dia80··on Top Inventions at Browserling
Can't help feeling the site is a bit more about the authors than helping the customer
dia80··on Show HN: weekend project – Quant finance academic paper aggregator
Hi all, thanks for taking the time to look would be interested your thoughts!
dia80··on Nouriel Roubini: Bitcoin Is a ‘Ponzi Game’
Since bitcoin is very new it is genuinely hard to tell if it will be eventually seen as brilliant innovation that was destined to be successful or get compared to the Dutch tulip bubble etc.

You raise valid concerns but there are counter arguments to them all so I don't think such a glib dismissal is warranted. From pg's essay[0]

The first time Peter Thiel spoke at YC he drew a Venn diagram that illustrates the situation perfectly. He drew two intersecting circles, one labelled "seems like a bad idea" and the other "is a good idea." The intersection is the sweet spot for startups.

[0] http://www.paulgraham.com/swan.html

dia80··on Cory Doctorow: How startups of Silicon Roundabout are gradually being flattened
This is only happening through the looking glass of 0.5% rates - 3% on property seems attractive. If the economy ever re-inflates and rates go up a couple of points all this building wont seem so attractive anymore...
dia80··on [dead]
118M USD and no transaction fee paid! Is this likely Satoshi moving his coins now he has been identified? I really hope he is ok and being out does not lead to any harm or distress for the man.
dia80··on We are moving into the quantitative finance industry
IPython + Pandas[0] + (sklearn/cvxopt/etc.) are an amazing combination and as far as I can see gaining share. I would love to work in Haskell but I'm always scared the library support / interactivity won't be there. Pandas has 8600 commits at the time of writing, unassailable?

[0] http://pandas.pydata.org/

dia80··on How to bet against the bitcoin megabubble
There can be no options since volatility is impossibly high.. lets take an example. You buy an $850 put with the spot price at $850 and it expiries in 6 months. 90 day realized volatility has been 130% annualized so the black-scholes formula says i have to charge you $300 usd for that option. You make money if BTC is $550 or below in 6 months. Your upside is $550 if it goes to 0 and down side is $300 usd. Still want to trade?
dia80··on DataNitro is now $99
I've had a shocking experience of this product (abysmal performance, memory leaks and poor support). It's basically a poorly wrapped version of pyxll[1] which I would recommend instead. It's not production software.

[1] http://www.pyxll.com/

dia80··on Patent Troll Forced To Settle Frivolous Lawsuit Against One-Man Business
> US corporate law makes it hard to really know who owns or benefits from Lodsys' lawsuits

As the director of a UK company every time I here this I am simply flabbergasted. In the UK all limited companies/partnerships accounts are a matter of public record.

dia80··on Surviving under water in an air bubble
Not sure if ship sinking and 10 crew dying and 1 one barely surviving is good news... :(
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