Collaborating Authors

Giveaway: Win an Anki Vector


Anki's Vector is an adorable companion that's packed with tech and personality. By simply speaking to Vector you can play games, have it take your picture, or ask it the weather via Alexa integration. As mentioned in our review, Vector is basically the modern version of the Tamagotchi virtual pet. He'll make you laugh, demand your attention, and just make you feel less lonely when you're at home by yourself. But if you found the $250 price tag hard to swallow, have no fear--we secured a Vector from Anki, and it could be yours!



Your task is to build a function f which takes the current state observation (a dictionary describing the current state) and returns the muscle excitations action (19-dimensional vector) maximizing the total reward. The objective is to follow the requested velocity vector. The trial ends either if the pelvis of the model falls below 0.6 meters or if you reach 1000 iterations (corresponding to 10 seconds in the virtual environment). The total reward is 9 * s - p * p where s is the number of steps before reaching one of the stop criteria and p is the absolute difference between horizonal velocity and 3. You can interpret it as a request to run at a constat speed of 3 meters per second.

Fall in love about the robot Vector by Anki


Based in California, the company Anki offers us a new robot model: Vector. It looks a bit like its predecessor who was destined to learn the code for kids! He will complete several roles such as answering questions, giving you the weather, taking pictures and many other things while being animated. What makes the robot endearing! Finally, I realize that in the long-term Vector could easily replace the "connected speakers" but without the music.

BERT for QuestionAnswering


A few months back, I wrote a medium article on BERT, which talked about its functionality and use-case and its implementation through Transformers. In this article, we will look at how we can use BERT for answering our questions based on the given context using Transformers from Hugging Face. Suppose the question asked is: Who wrote the fictionalized "Chopin?" and you are given with the context: Possibly the first venture into fictional treatments of Chopin's life was a fanciful operatic version of some of its events. Chopin was written by Giacomo Orefice and produced in Milan in 1901. All the music is derived from that of Chopin.

Context Vectors are Reflections of Word Vectors in Half the Dimensions

Journal of Artificial Intelligence Research

This paper takes a step towards theoretical analysis of the relationship between word embeddings and context embeddings in models such as word2vec. We start from basic probabilistic assumptions on the nature of word vectors, context vectors, and text generation. These assumptions are supported either empirically or theoretically by the existing literature. Next, we show that under these assumptions the widely-used word-word PMI matrix is approximately a random symmetric Gaussian ensemble. This, in turn, implies that context vectors are reflections of word vectors in approximately half the dimensions.