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2015-09-30

A brief history of word embeddings (and some clarifications)

One of the strongest trends in Natural Language Processing (NLP) at the moment is the use of word embeddings, which are vectors whose relative similarities correlate with semantic similarity. Such vectors are used both as an end in itself (for computing similarities between terms), and as a representational basis for downstream NLP tasks like text classification, document clustering, part of speech tagging, named entity recognition, sentiment analysis, and so on. That this is a trend is obvious when looking at the proceedings from the recent large conferences in NLP, e.g. ACL or EMNLP. For the first time (ever), semantics was…

2014-12-17

Social Media Syndromic Surveillance

The Public Health Agency of Sweden has an initiative called Hälsorapport, which is part of the European system Influenzanet, whose overall goal is “monitor the activity of influenza-like-illness (ILI) with the aid of volunteers via the internet.” The goal of Hälsorapport is similarly to monitor the spreading of diseases in Sweden and to inform the general public, the health care system, and other government agencies about the current health status of Sweden. The monitoring is done by eliciting weekly reports from volunteers regarding their general health status, and in particular regarding any symptoms they might have. According to the website,…

2013-04-16

Gavagai on the 33-list

We are pleased to announce that Gavagai made it to the prestigious 33-list, Sweden’s top list of innovative high-tech companies. The list is compiled yearly by Ny Teknik and Affärsvärlden, Sweden’s leading technical and business magazines respectively. The honor was awarded by the editor in chief of Affärsvärlden, Jon Åsberg. —There is no short-cut to understanding the wealth of information found in human language. This requires specialized technology, which is what we build at Gavagai. Our goal is to build tools that allow every creative developer to tap into this knowledge, says Dr. Jussi Karlgren, co-founder of Gavagai.

2012-08-22

Miserable Monday and the Effect of Vacation in Swedish Social Media

Recently, we found out that Miserable Monday might not be anything but a myth. As avid fans of the idea of a complete banishment of Mondays, it will take more than a couple of news articles to convince us. Luckily, Ethersource is more than ready to clear up any doubts. For some time, we have been monitoring the Swedish domain of social media, and how people are feeling when talking about themselves. The curves have been steadily working their ups and downs. However, these past few months we have been noticing a very curious occurrence. First, let’s take a look at…