Tuesday, July 14, 2015

Logstash | Collect, Enrich & Transport Data

Logstash is a tool for managing events and logs. You can use it to collect logs, parse them, and store them for later use (like, for searching). If you store them in Elasticsearch, you can view and analyze them with Kibana.

It is fully free and fully open source. The license is Apache 2.0, meaning you are pretty much free to use it however you want in whatever way.

For more info, see https://www.elastic.co/products/logstash

https://www.elastic.co/products/logstash
https://github.com/elastic/logstash
http://hemingway.softwarelivre.org/fisl16/high/41e/sala_41e-high-201507101700.ogv
http://jasonwilder.com/blog/2013/11/19/fluentd-vs-logstash/



Financial Footprints: Transactions in Real Time - 2011

Saturday, July 04, 2015

Dunbar's number x Our Facebook "Friends/connections"

How can we have so many "Friends" on Facebook?

Are they really our "friends" or just connections like we have in LinkedIn, twitter or others social networks?

Read the text below and think about it.

Dunbar's number

Dunbar's number is a suggested cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is and how each person relates to every other person.[1][2][3][4][5][6] This number was first proposed in the 1990s by British anthropologist Robin Dunbar, who found a correlation between primate brain size and average social group size.[7] By using the average human brain size and extrapolating from the results of primates, he proposed that humans can only comfortably maintain 150 stable relationships.[8] Proponents assert that numbers larger than this generally require more restrictive rules, laws, and enforced norms to maintain a stable, cohesive group. It has been proposed to lie between 100 and 250, with a commonly used value of 150.[9][10] Dunbar's number states the number of people one knows and keeps social contact with, and it does not include the number of people known personally with a ceased social relationship, nor people just generally known with a lack of persistent social relationship, a number which might be much higher and likely depends on long-term memory size.

Dunbar theorized that "this limit is a direct function of relative neocortex size, and that this in turn limits group size ... the limit imposed by neocortical processing capacity is simply on the number of individuals with whom a stable inter-personal relationship can be maintained." On the periphery, the number also includes past colleagues, such as high school friends, with whom a person would want to reacquaint themself if they met again.[11]

Source:
https://en.wikipedia.org/wiki/Dunbar's_number

Tuesday, June 30, 2015

Smallpdf.com

Hi folks,

Do you need to work with PDF files?

You need to use this website called smallpdf.com


Saturday, June 27, 2015

How to install GitBook using NPM

Visit the website: https://github.com/GitbookIO/gitbook

Type on your terminal:

npm install gitbook-cli -g

output:

Caios-MacBook-Pro:thedatasciencenotebook caiomsouza$ npm install gitbook-cli -g
/usr/local/bin/gitbook -> /usr/local/lib/node_modules/gitbook-cli/bin/gitbook.js
gitbook-cli@0.3.4 /usr/local/lib/node_modules/gitbook-cli
├── bash-color@0.0.3
├── user-home@1.1.1
├── commander@2.6.0
├── tmp@0.0.23
├── q@1.0.1
├── semver@2.2.1
├── lodash@2.4.1
├── npmi@0.1.1 (semver@4.3.6)
├── optimist@0.6.1 (wordwrap@0.0.3, minimist@0.0.10)
├── npm@2.4.1
└── fs-extra@0.15.0 (jsonfile@2.2.1, graceful-fs@3.0.8, rimraf@2.4.0)