Tag Archives: quora

How can the various machine learning algorithms be classified/summarized according to the problems they solve?

Answer by Franck Dernoncourt:

Let me add two pictures to Paul Hobbs answer, taken from http://work.caltech.edu/lectures... (Yaser Abu-Mostafa, Caltech):

Big picture of what learning is:

Why can't the poor be handed out lots of money to make them rich?

Answer by Yishan Wong:

Because money is not wealth.

This is a fundamental misunderstanding that many people have about money, and in fact probably stands at the center of why some people are good at making money while others are not, why some people are wealthy and others are not.

(First, set aside the issues of inherited wealth, or "unfairly earned" money.  Those are distortive effects, but let's focus on the dominant factor)

Wealth ("being rich") means producing things of value.  It does not mean "having lots of money."

The key word there is value.  That word is more important than wealth or money, it is the real central factor around which human endeavor and economies revolve.  Money and wealth are big words that get a lot of play, but value is a boring word that most people don't notice.  It is actually the important one.  Value is what is produced when you do work, mine resources, develop an idea, produce an invention, engage in mutually-beneficial commerce, etc.  Value is the "thing" that humans make (out of nothing) by working, creating, trading, etc.  Continue reading Why can't the poor be handed out lots of money to make them rich?

HackThisSite like sites you might want to know

I posted a question to Quora about hackthissite.org 's benefits and reality. I got well defined answer that I want to share with you. Here is the question and the answer.

Question: Do you think hackthissite.org is a good tool to master web hacking?

Answer: Thanks to Frank Smith

The missions on that website are pretty realistic in terms of real world hacking. But if you finish all the missions you will have only scratched the surface of "hacking". There are literally dozens** of site that will provide you similar missions but they all lack one thing, fundamentals. Finishing all the challenges is great but it won't teach you ABCs of security. If you really want to understand Web Application security I recommend Web Application Hackers Handbook. This books is the single best source of learning security for Web Applications.

http://www.amazon.com/The-Web-Ap...

Since this book only focuses on WebApplications, I would recommend Counter Hack Reloaded as a good counterpart. Its a bit dated (2006) but it goes in great details about fundamentals and covers a huge ground.

http://www.amazon.com/Counter-Ha...

**List of sites similar to Hackthissite.org

roothack.org
mibs-challenges.de
hax.tor.hu
hackertest.net
dareyourmind.net
hackquest.com
hellboundhackers.org
net-force.nl/challenges
overthewire.org/wargames
bright-shadows.net
exploit-exercises.com/
root-me.org/
kioptrix.com/blog