Optimera

tisdag 21 juli 2015

What are Bloom filters?

To understand Bloom filters, you first have to understand hashing.

A hash is like a fingerprint for data. A hash function takes your data — which can be any length — as an input, and gives you back an identifier of a smaller (usually), fixed (usually) length, which you can use to index or compare or identify the data.

This is a hash of my full name:

b3f9b3a3504ccb29c4183730a42c8d56

--

There are a few properties which are desirable in a useful hash 
function. The most important one is that the same input must always hash
 to the same output.

--

When suggesting stories to a user, the system may come up with thousands of possibilities, but not every one will be appropriate for a user. Perhaps a story has been suggested to them too many times already. Perhaps they’ve already read it. We need to filter those stories out, but we don’t want to retrieve thousands of records from the database to do it. We need a mechanism that is particularly good at answering the question “has this been seen before?”.

And for that, we use a Bloom filter.

https://medium.com/the-story/what-are-bloom-filters-1ec2a50c68ff

The Pink Ghetto of Social Media

In a culture of fast-paced digital newsrooms where traffic is king, “social” can make or break a story. For sites relying on advertising as their bread and butter, social media editors help to save the newsroom from inevitable slumps in traffic.
Social media is one of the few areas of the news industry where women outnumber men in leadership positions. A study by the Colorado Women’s College at the University of Denver found that women are only 23.3 percent of leaders in media at large, but in social media that number is 55 percent. The role of social media editor stands in opposition to that of writer or editor, which is still predominantly male. The Women’s Media Center annual report found that only 37.2 percent of newsroom staffs were made up of women, a figure that has gone nearly unchanged since 1999.
https://medium.com/matter/the-pink-ghetto-of-social-media-39bf7f2fdbe1

The Biggest Facebook Publishers Of June 2015

http://blog.newswhip.com/index.php/2015/07/biggest-facebook-publishers-june-2015#PlJDEVoASOMvYDEd.97

With 7.6 Million Shares, Huffington Post Is Top Publisher In June On Facebook [Report]

Huffington Post earned the most social shares on Facebook among the internet’s major publishers, with more than 7.6 million shares of its content during the month of June.
That activity comes from the news site’s 21,722 published articles during the month, according to new data from NewsWhip, a platform that tracks content sharing on social networks.
Traditional media outlets like Fox News (4), NBC (5), The Guardian (9) and BBC (10) all made the top ten.
Fox News published 59,000 articles during June.
http://marketingland.com/with-7-6-million-shares-huffington-post-is-top-publisher-in-june-on-facebook-report-135608

Readz launches fast-publishing, multi-platform tool for brands

The targeted user, he said, is the brand — large or small — that wants to quickly build a well-designed, interactive microsite for multiple device types.

http://venturebeat.com/2015/07/17/readz-launches-fast-publishing-multi-platform-tool-for-brands/