Hacker Newsnew | past | comments | ask | show | jobs | submit | thro1237's commentslogin

Thanks -- Is there some software (mostly free) where I can model these strategies and understand the payoffs, etc?


http://www.optionsprofitcalculator.com/ seems to be kind of popular, but it's not the most intuitive to use. I think of this as something that many brokerages offer...


This is a pretty clean list of all the common strategies along with charts showing their P/L:

http://www.theoptionsguide.com/option-trading-strategies.asp...


Isn't it possible to bring a class action lawsuit? This is precisely the kind of things that a class action suit is a good remedy for.


It is. But read before you click!

“Any dispute or claim relating in any way to your use of any Amazon Service, or to any products or services sold or distributed by Amazon or through Amazon.com will be resolved by binding arbitration, rather than in court, except that you may assert claims in small claims court if your claims qualify. The Federal Arbitration Act and federal arbitration law apply to this agreement.

There is no judge or jury in arbitration, and court review of an arbitration award is limited. However, an arbitrator can award on an individual basis the same damages and relief as a court (including injunctive and declaratory relief or statutory damages), and must follow the terms of these Conditions of Use as a court would.”

https://www.amazon.com/gp/help/customer/display.html/?nodeId...


So, there is a no way you could be a regular (non-contractor employee) of a US company if you are living outside the US? How does companies like Github and Stripe, who have a lot of remote employees work?


He lost me when he said this:

"Tensorflow: This is the finest Google codebase I ‘ve studied. Great design, very high quality code, and easy to understand how everything fit together."

Tensorflow is the worst code you can learn from a library design perspective.


Why is that? (I know nothing about it, just would love to hear why you say that)


I have tried to read Foucault and could barely understand what he was trying to say. May be most students are quiet because they don't know what to refute :-)


Isn't it possible to make all these changes in a server and make it available as a docker container or VM (with minimal customization required for end users?)


For sure! After years of running a personal mail server with a setup similar to what's described in the article, I moved to using a pre-built docker setup and haven't looked back: https://github.com/tomav/docker-mailserver

The easiest way to get this type of VM setup going is to start up the container on your mail host with all of the fun features (filters mostly) turned off, verify that the new mail container works as expected, then slowly start turning on features one by one so that if you happen to break something with a bad configuration you know how to roll back to a configuration that is functional.


Given that people who memorize sanskrit hymns typically come from a single caste (with limited intermarriage between castes), the control should just include the members of that caste (but who don't memorize hymns) - to account for genetic effects. And as another commenter pointed out, this doesn't prove anything about Sanksrit. To prove something like that, the authors should have compared brain sizes with people who memorize other non-sanskrit texts.


How about London Black Cab drivers who learn "The Knowledge"? http://www.bbc.co.uk/news/health-16086233

"Earlier studies of the brain of the cabbie had already noted the increase in "grey matter" in the hippocampus, an area found at the base of the brain."


Yea, exactly..


A substantial group that memorizes a foreign-language (to many) text are Muslim huffaz, who commit the entire Koran to memory. They'd make a good comparison group, given their large numbers, ethnic heterogeneity and worldwide distribution.


Or The Knowledge, where London cab drivers have to memorise the whole of London’s streets


It is well attested that licensed London taxicab drivers (those with “the knowledge”) do in fact end up with different brain structure.

I haven’t seen any studies of what they might give up in the process, though it does involve a lot of sitting.

Example: https://www.scientificamerican.com/article/london-taxi-memor...


Wow. I didn't know about that.

Kind of casts the whole dispute with Uber thing into a whole different light, doesn't it?


Does it? A machine can indeed do a better job (in the sense of requiring negligible training) of knowing all the streets and democratized “the knowledge” which previously was the purview of a small guild.

I am sorry for their sunk cost, but really minicabs+gps and now uber/Lyft et al are as good, or would be if taxis didn’t have a pick up monopoly.


From previous articles on "the knowledge" I believe that no, a machine cannot really do "better" or not yet, at least.

IIRC at the exam you could get questions like "The passenger tells you that his cousin mentioned a building with a bas-relief of Holy Mary holding Jesus, it was right around the angle from his hotel, but he does not remember the hotel's name".

You are supposed to know the place and the best way to get there, based on just this (also, a good number of "knowledgeable" taxi drivers go for an official London Tour Guide exam soon after, with relatively little effort, considering they have already memorized thousands of places, monuments and architectural details).


Untrained driver + Google Maps sits on a different point on the cost / benefit curve than Driver-with-the-Knowledge.

Different customers might prefer different total packages on different occasions.

I for one rarely need the more expensive Driver-with-the-Knowledge option, especially when I can ask Google many of the same questions.


I may concede that it can perform “adequately at a lower price point” (I use Google myself when I am not in my hometown), but the parent wasn’t talking about price.


I went off the phrase "A machine can indeed do a better job [..]" and was seeing the price as a big part of that package.

Looks we agree about everything that we actually made explicit. The disagreement was about the implicit meaning of whether price was included in the meaning of 'better job'.


The Knowledge has a very important secondary effect - it creates a huge sunk cost, vastly increasing the downside of losing your license. Getting a green badge takes three to four years of full-time study. You can lose it for relatively minor offences like short-changing a passenger or taking a tourist on the scenic route. Hackney cab drivers with a green badge have a far stronger incentive to do business honestly than a minicab or Uber driver.


>> Does it? A machine can indeed do a better job (in the sense of requiring negligible training) of knowing all the streets and democratized “the knowledge” which previously was the purview of a small guild.

A theoretical machine could do a better job. In practice, we can't build anything that can reason about routes anywhere near as well as London cabbies do. And I'd say that even without knowing about The Knowledge.

Pamar's comment above has a very good example of the kind of thing "a machine" is still very, very far from achieving.


It certainly CAN but a regular GPS just sucks compared to the Knowledge.


With enough driving experience even with GPS you'll learn enough about some of the cases where you can know better.


People can learn, of course. I'm just saying that a an ever changing score of Uber drivers will not be comparable to drivers with "the Knowledge". Any other claim feels preposterous to me.

This can of course be replicated with a computer, but a simple GPS is not going to cut it. Advanced machine learning, voice recognition like nothing I have ever seen, very good A.I. to resolve misunderstandings about where tourists and other non frequent travellers might really want to go instead of where they actually said. And so on and so on. We can get there. An underpaid, recently started and soon to be replaced, stressed uber driver in his uncles car armed with a GPS app is just not going to cut it. Yet.


Forcing people to pay for the gold-plated service of the Knowledge seems like a bit trade-off though.


They're not forced to pay for it. They can use other private hire cabs if they don't want a taxi with a driver with the knowledge.


Are they allowed to hail from the street?


No, if you want to hail from the street you need a taxi.

Uber doesn't allow hailing from the street either.


How dissimilar is roadside hailing from hailing a cab in-app to your exact location?


Thanks to ubiquitous smart phones these days, they are near substitutes. It didn't use to be that way.


When I was young I had a chance to meet two very young huffaz (we say hafız) candidate. They were probably around 10 to 12 years old. What fascinating was, they did not know any Arabic and memorize almost more than a full page a day continuously. I remember them as very calm and nice kids. Also for the context, there are around 77.000 words in Koran.


While it's traditionally the Brahmin caste that memorizes Vedic hymns, there's plenty of genetic diversity even within the caste, which is spread across 10s of millions of people in very different parts of India.


May be, but there might be enough differences between castes as opposed to within a caste. The control should be as close to the experimental group as possible. Finding a control group from the same caste is inexpensive.


This is precisely what I was thinking. Something interesting that I hadn't thought of before is that we now actually live in a time where genome sequencing has become cheap enough that low-N studies (like those in MRI/fMRI-based studies) can actually begin to participant-match based on genetic background. This might become the new gold standard!


Sequencing might become cheap enough to do that, but our understanding of the functions of the different genes is so lacking that I don't think a lot of meaningful data can be extracted for most studies' subjects.


I don't think we necessarily need to know the function of the genes in order to create a participant matching paradigm that is better than what is being employed currently. For example we can get a more precise snapshot of ancestry using sequencing than simply relying on self-reported 'race'. Also I don't think it needs to be a perfect match; simply stating that controls matched case participants within X percent ancestry would be a useful statistic to report in the methods.


We don't necessarily understand the functions of genes, but we're starting to establish strong correlations through genome-wide association studies.

https://www.biorxiv.org/content/early/2017/09/06/184853.1


since the book 'battle for sanskrit' by rajiv malhotra came out more hindus are now aware of efforts by various groups to denigrate sanskrit as an 'oppressive' language used to control the masses

this is funny because the British actually did that exactly with imposition of english education to create the obedient clerk class for their colony, and claimed it was in fact liberation

and then the germans claimed sanskrit was theirs and could not possibly be of indian local origin and nazi-fied the 'aryan' language

and of course no european scholar could countenance the possibility of hindu epics like the ramayana and mahabharata let alone the vedas could be older than the homeric epics of greek civilization and conveniently 'dated' all indian history to preserve their superiority


That's probably people pissed off that they have to learn their mother tongue, english, and hindi to get around in india.


Here is how you can get a gun in the Iceland[1]: " all automatic and semi-automatic rifles and most handguns are banned for public use in Iceland.

People who hold a gun license can buy semi-automatic shotguns, bolt-action rifles, single-shot rifles and double-barrel rifles to hunt with but all rifles over 8 millimeters in caliber are banned in Iceland, although with a special permit to hunt large animals abroad, such as elephants or African cape buffalos.

It is also possible to obtain a special collector’s license for handguns and sports associations practicing marksmanship can apply for a license to use small indoor 22 caliber handguns as used in the Olympics.

To obtain a gun license people must attend a course and pass a test at the police station. They also have to pass a medical examination where they are specifically asked about their mental health. The gun license is issued by the respective District Commissioner."

Legal firearms in Finland must be registered and licensed on a per-gun basis[2]

Do you the see the problem? In the US, the second amendment makes it extremely hard to make sure that bad actors (a small percentage of the population) don't get a gun. In the countries you mentioned, they have an effective of preventing this from happening.

[1]http://icelandreview.com/stuff/ask-ir/2011/02/10/what-kind-g... [2] https://en.wikipedia.org/wiki/Gun_laws_in_Finland


This is just a renaming of Deen Dayal Upadhyaya Gram Jyothi yojana launched by the same government in 2015, which itself was a renaming of Rajiv Gandhi Grameen Vidyutikaran Yojana (RGGVY) launched by the previous government. Yes, one can rename one's own scheme and get another round of press coverage. https://en.wikipedia.org/wiki/Deen_Dayal_Upadhyaya_Gram_Jyot...


Now, if it can spit out Android apps :-)


Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: