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To add to this, shamelessly self-promoting, Notebooker (https://github.com/man-group/notebooker) is a neat way of scheduling your Jupyter notebooks as parametrisable reports whose results are presented in a little web GUI (either as static HTML, PDF, or as reveal.js slideshow renders)


Alternative data is non-financial data which can be tied to various securities.

Financial data, for example, would be EUR USD spot prices. Non-financial data (i.e. "alternative data") could be healthcare reports which you could theoretically couple to e.g. pharma stocks.


There are quite a few, and I can think of these off the top of my head:

- Real-time weather data from major ports and across the main shipping lines

- Telemetry from crop and soil report systems

- Up-to-date satellite imagery of basically anything large under construction (solar farms, factories, ...)

Provide information like that in a machine-readable, consistent format and you have a business.

Btw... Using satellite images to track car manufacturers' inventory levels is an old idea, used for more than a decade.


> But I guess the City of London needs to get their financial "tips" somehow...

[Citation needed]


MI6 officer Richard Tomlinson[1], wrote a tell-all autobiography in which he described an HR relationship between the city banks and MI6 whereby officers were 'retired' into city jobs with few questions about the gaps in their CVs. In return the bankers were given some intelligence tidbits as quid pro quo.

I should point out his departure from MI6 was acrimonious, so he's not an entirely neutral source, but interesting nonetheless.

[1] https://en.wikipedia.org/wiki/Richard_Tomlinson


Wall Street, not the City of London, and probably insiders leaking info instead of spooks at work, but I’ll just leave this here:

https://www.cnbc.com/2018/02/14/insider-trading-is-still-ram...


If it's private companies and not governments in a different city in a different country on the other side of the world it's not terribly relevant.


“One study says the close relationship between the government and banking insiders during the financial crisis affected trades.”


I have used jupytext (https://github.com/mwouts/jupytext) for this and it seems to work great - it outputs a separate .py file which is easily diff-able.


Thanks for the note; this looks good.


Out of interest, why are they scum? Never heard this before about LinkedIn.


Where to start?

* They steal the address book of any user who installs their app, collecting private information of people who have given no such consent

* They then proceed to create shadow profiles of all those people that haven't registered, creating the illusion that more people are on LinkedIn than really are (not sure if they still do this)

* They then start spamming all those contacts with multiple emails per day, for several days, asking them to register with LinkedIn. There is no "fuck off and stop emailing me" button, the only way to make it stop is to register for an account

I've blacklisted linkedin.com in my mailservers for this reason. And I would agree with the GP that they are scum and that working there lowers my opinion of a person.


After writing my own comment and reading the others in this thread, I actually realized I gain nothing from LinkedIn and deleted my account.

From now on I will only use my personal network and services I have more respect, like SO Jobs, if I have a need for new opportunities.


Literally just received an unsolicited LinkedIn email as I was reading your comment :(


I would assume it is related to their widespread use of dark UI patterns and general attempts to get your to share e-mail-addresses of everyone you've ever communicated with. Constant badgering with new types of notification emails and generally strange user-hostility.

I use the site but I'm deeply skeptical of the way their business tactics appear in my interactions with the site.

Edit: I would probably meet them for an interview to get a feeling for the company and team, but as a company they start on the minus side for me.


I don't know are they really scum, but also for me the platform is mostly clueless headhunter bots offering Ruby positions even without reading my CV. Ok, I know it's nice that we have headhunters banging our doors, but when you like to do things properly yourself, you kind of expect the same from the headhunters.

P.S. I never took any jobs from that platform.


I'm curious to know about this too.


LinkedIn is click-bait personified


This has been the differentiator between Netflix and Amazon Prime - very welcome news indeed. I do wonder how limited the number of allowed downloads will be, though...


This is absolutely fascinating - and stunning that it only took ~90 seconds to be infected. Turns out the source code is... open source:

https://github.com/jgamblin/Mirai-Source-Code/blob/6a5941be6...


Just to clarify it's not published by the author - the author got hacked and their source leaked.


Well, crap, you had the same thing when RedHat 7 was new. new RedHat 6 installs that went online were getting pwned in just a few minutes. The exploit scripts were open source even then.


This was surprisingly moving! notch is truly talented.


Not sure I agree with the terminology of the article (fast rather than quickest accelerating), but I thought this quote was special:

> Speeds like this offer more Gs than Earth, so the rate of acceleration is faster than falling. It can feel difficult to support your head and shoulders if you don’t lean back on the headrest.


1 g is nothing.

"A hard slap on the face may impose hundreds of g-s locally"

"Early experiments showed that untrained humans were able to tolerate 17 g eyeballs-in (compared to 12 g eyeballs-out) for several minutes without loss of consciousness or apparent long-term harm" https://en.m.wikipedia.org/wiki/High-G_training


from the paper(o) in citation 3 from the linked wiki article(i):

> The terms "eyeballs in" "eyeballs out," and "eyeballs down" correspond to acceleration fields AX, -Ax, and AN, respectively, where AX, -Ax, and AN refer to the direction of acceleration forces measured in the conventional airplane body-axis coordinate system.

> AN acceleration factor, ratio of acceleration force to weight, positive when directed upward along spinal axis (i.e., from seat to head )

> AX acceleration factor, ratio of acceleration force to weight_ positive when directed forward transverse to spinal axis (i.e., from back to chest)

(o) https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/199802...

(i) https://en.m.wikipedia.org/wiki/High-G_training


At 2.6-sh second mark your car accelerates with more than 9.8m/s^2 to get to 60.

But even lower accelerations will glue you to the seat because gravity acceleration affects every part of your body. Where as the car grabs you by the butt and yanks you forward.

So - I think he has probably some vague idea of Newtonian physics but just didn't manage to produce coherent sentence.


> But even lower accelerations will glue you to the seat because gravity acceleration affects every part of your body. Where as the car grabs you by the butt and yanks you forward.

The feeling of weight we associate with gravity is not distinguishable from elevator-style or car-style acceleration (not counting vibrations; or tiny gradients in the field). You don't feel gravity gluing you to the ground, you feel the ground continuously shoving you skyward to stop the free fall.

See: equivalence principle https://en.wikipedia.org/wiki/Equivalence_principle


How is more than one g accelleration possible? There is one g making the friction between the tyre and the road.


I think this is intuitively wrong for a vehicle with a gear wheel locked to geared track: the gears push against each other and acceleration would be possible even in a zero g environment. Now, cars don't have gear wheels, but I assume the same principle applies.

Edit - here's a more stringent discussion: http://physics.stackexchange.com/questions/75032/maximum-acc...


Cars can do more than 1G even without downforce. Sports car street tires commonly ~1.2g, race tires commonly ~1.5g+

High school friction is wrong.

Source: various of my cars (in the past, I just have lame hybrids now) and a g meter


> High school friction is wrong.

No, it's at least mostly correct. High school friction says

    F = mu * W
Where F is the output force, mu is the coefficient of friction, and W is the normal force (typically equal to the weight).

If it's failed you, it's failed in failing to mention that the tire-road interface can have a coefficient of friction greater than one, and in failing to mention that the normal force can be increased with aerodynamic downforce.


High school physics tends to claim that the coefficient can't be greater than one.

Source: note all the people here who thought it couldn't be greater than one.


How is that due to high school physics rather than naive intuition?


Mine never implied that, and I could have easily disproved it with the grippy pads on my giant calculator.


Because the coefficient of friction could be greater than 1. And the "sticking" force is proportional to the tire area. And the air pushes you down while you move.

As long as the torque is lower than friction you should be fine.


There's only one answer to that: the Lotus 78.

https://en.m.wikipedia.org/wiki/Lotus_78


I don't understand the question. The car is accelerating horizontally, the gravity acts vertically.


The cars also gets pressed down by aerodynamics.


But downforce isn't appreciable until over 50mph (80kph), short of having stupidly oversized wings (which would drastically slow your acceleration) or active downforce (fans etc).


This is actually why a lot of expensive sports cars have 0-60 times of 2.9 seconds. Unless you design specifically for it, it's difficult to generate much downforce at low speeds.

Related: if you've ever wondered why some drag cars (e.g. Funny cars) have short exhaust pipes angled up and back, now you know.


Similar to the Red Bull F1 car's exhaust-blown diffuser: http://jalopnik.com/5892403/the-exhaust-pipe-that-made-red-b...


Imagine the tires were velcro'd to the ground. Or that they had giant spikes stabbing down for traction. Clearly you could go over 1g with that, right?

The same kind of thing (not literally, but analogously) is already happening at the atomic level, giving the tires a coefficient of friction of more than 1.


Indeed. My weak Google-fu indicates that the coefficient of friction of tyres against a dry road surface is something like 0.9, so there must be some improvement in tyre technology here just to make the thing go without creating a thick black smelly line on the road.


A car doesn't drag along the road. The tyres are in relatively static contact (unless you're drifting etc.). Static and dynamic friction are quite different.


As an aside: Spinning-rust hard drives are rated in the hundreds of Gs. While the earth only pulls with 1G, if you drop the drive onto a hard surface, the sudden stop is an acceleration of hundreds of Gs, due to the very short time frame.


Acceleration of more than 1g is probably not possible for 0-60; there isn't much of that speed range that would allow for downforce (downforce would only start have a tangible effect after approximately 50mph (80kph)), and there is no other appreciable way for the car to generate more friction with the road that doesn't scale with vehicle mass.

I suspect what the OP was trying to get at is the vector addition of gravity plus the forward acceleration of the car means that the apparent scalar force feels substantially higher than normal (i.e. 1g downwards); it's just poorly worded.


No they actually mean what they write - 1g gives you 0-60 in 60*1609/3600/9.81 = 2.73 seconds. The way to get that friction is probably to use a particular combination of tires and road. It's equivalent to standing still on a 45 degree slope -- not impossible, but definitely a risk of slipping there.


but there is four tires!


and 4/4ths of a car


With rear-wheel drive, acceleration transfers most of the vehicle weight to the rear wheels. That's why funny cars do wheelies. That doesn't work so well for front-wheel drive, so those vehicles can't accelerate as quickly as rear-wheel drive vehicles. With four-wheel drive, weight transfer cuts both ways, but more rubber on the road helps, for sure. Low center of gravity helps too, I think.


With wheels on the bottom of the car acceleration transfers weight to the rear axle. The forward forces on the car body are below the CG so produce a net rearward tilting torque.


Yes. But my point is that, with front-wheel drive, that transfers weight away from the driven axle.


Still at the Ecuadorian embassy in London, I suppose?


https://www.reddit.com/r/WhereIsAssange/

Has not been seen since 16th October, DDoS happened, since then wikileaks doesnt sign their twitter messages, latest hashes mismatch.


That is roughly the time that Ecuador cut off his internet over concerns he was trying to influence a foreign nation's election, right?

Odds are they are having a lot of behind doors talks about the terms of his stay in their embassy and how he will "report" on this event.



Thats his lawyers, Swedish "authorities", and media talking, not Assange.


None of those people need to go to the Ecuadorian embassy for any reason other than to see Assange. It stands to reason that the meeting was there because he is there.


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