Claudiu Gruia

50 Flips | 2 Magazines | 1 Like | 10 Following | 4 Followers | @claudiugruia | Keep up with Claudiu Gruia on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “Claudiu Gruia”

Chi-Squared Test – The Purpose, The Math, When and How to Implement?

We have written 301 tutorials which have been read 2,728,539 times.<p>Before we build stats/machine learning models, it is a good practice to understand …

X's and O's

pdf [2MB] ppt [6MB] <br>in French by Charles Crouspeyre <br>in Japanese <br>in Simplified Mandarin by Jimmy Lin <br>in Traditional Mandarin by Jimmy Lin <br>in Persian …

Deep Learning

Learning from Imbalanced Classes - Silicon Valley Data Science

If you’re fresh from a machine learning course, chances are most of the datasets you used were fairly easy. Among other things, when you built …

Machine Learning

I Botched a Perl 6 Release And Now a Robot Is Taking My Job - Perl 6 Party

2016-08-20 | 2231 words | Automating your release cycle<p><i>Deconfusion note: if you're just a regular Perl 6 user, you likely use and only ever heard of</i> …

Software Development

Please enjoy beautiful photos of lil foxes

Foxes are nature's greatest gift to us — not only are they cuter than dogs, they don't demand that we feed them and pay for their rabies shots. They are wild, but in a cool way. They probably won't eat your young child, like some other wild animals would. They are smart, and have been known to …

New Neutri­no Anomaly Hints at a Matter-Antimat­ter Rift

Author: Natalie Wolchover. Natalie Wolchover Science<p>Date of Publication: 07.31.16.<p>Time of Publication: 7:00 am. 7:00 am<p>In the same underground …

Neverland: My Korea

<i>Josh White (also known as JT White) grew up in the furthest reaches of eastern Canada—the island of Newfoundland. From there, life's journey took him around the world and eventually to the bustling streets of Seoul, South Korea. It was there that he discovered his most important form of expression</i> …

MIT scientists find weird quantum effects, even over hundreds of miles

In the world of quantum, infinitesimally small particles, weird and often logic-defying behaviors abound. Perhaps the strangest of these is the idea …

How I built an app with 500,000 users in 5 days on a $100 server

There seems to be a general consensus in the world of startups that you should build an MVP (minimum viable product) without caring too much about …

Node.js

38 Seminal Articles Every Data Scientist Should Read

Here is selection containing both external and internal papers, focusing on various technical aspects of data science and big data. Feel free to add …

My Lobotomy

• <b>Author:</b> Howard Dully & Charles Fleming<p><b>In this heartfelt memoir from one of the youngest recipients of the transorbital lobotamy, Howard Dully shares the story of a painfully dysfunctional childhood, a misspent youth, his struggle to claim the life that was taken from him, and his redemption.</b><p>At …

Realtime Data Processing at Facebook

Recently there has been a lot of development in realtime data processing systems, including Twitter's Storm and Heron, Google's Millwheel, and …

Machine Learning Nanodegree

Intersect 2018 Conference: Early Bird tickets now available! Amazing speakers, world-class hiring partners, and more!<p>Nanodegree Program<p>Become a …

New paper: “A formal solution to the grain of truth problem”

Future of Humanity Institute Research Fellow Jan Leike and MIRI Research Fellows Jessica Taylor and Benya Fallenstein have just presented new results …

Algorithms

This 'Hourglass' Liquid Battery Runs on Gravity

Scientists at MIT have designed an ingenious new concept for a battery that operates on the same fundamental principal as an hourglass—it relies on …

Rats feel empathy for other rats, unless they're on anti-anxiety medication

Rats care about their rat buddies — unless they’re on anti-anxiety medication, it would seem.<p>A 2011 study found that when a free rat came in contact with a rat trapped in a container, the free rat was empathically motivated to release the distressed rat from its cell. But a new study, published in</i> …

University of Chicago

Three shirts, four pairs of trousers: meet Japan's 'hardcore' minimalists

Fumio Sasaki gave away the majority of his possessions and now lives with just the bare essentials<p>Fumio Sasaki’s one-room Tokyo apartment is so stark friends liken it to an interrogation room. He owns three shirts, four pairs of trousers, four pairs of socks and a meagre scattering of various other …

Japan

An overview of gradient descent optimization algorithms

Note: If you are looking for a review paper, this blog post is also available as an article on arXiv.<p>Update 15.06.2017: Added derivations of AdaMax …

Deep Learning

LSTM Networks for Sentiment Analysis — DeepLearning 0.1 documentation

LSTM¶<p>In a <i>traditional</i> recurrent neural network, during the gradient back-propagation phase, the gradient signal can end up being multiplied a large …

Facebook’s Sheryl Sandberg speaks publicly about husband’s death for first time

Facebook COO Sheryl Sandberg gave an powerful speech at UC Berkeley’s commencement on Saturday about resilience and loss.<p>The speech addressed how Sandberg coped after her husband Dave Goldberg died unexpectedly in Mexico during a trip on May 1, 2015.<p>“I have never spoken publicly about this before. …

Empathy

Why Aging Isn’t Inevitable - Issue 36: Aging

Humans age gradually, but some animals do all their aging in a rush at the end of life, while others don’t age at all, and a few can even age …

Biology

How Your Brain Uses Statistics to Boost Your Confidence

We make many decisions every day, from choosing whether to buy skim or whole milk, to deciding which way to turn at an intersection. How confident …

Claude Shannon, the Father of the Information Age, Turns 1100100

Twelve years ago, Robert McEliece, a mathematician and engineer at Caltech, won the Claude E. Shannon Award, the highest honor in the field of information theory. During his acceptance lecture, at an international symposium in Chicago, he discussed the prize’s namesake, who died in 2001. Someday, …

For What It’s Worth: A Review of the Wu-Tang Clan’s “Once Upon a Time in Shaolin”

This is what we know: On November 24, 2015, the Wu-Tang Clan sold its latest album, <i>Once Upon a Time in Shaolin</i>, through an online auction house. As …

Rap & Hip-Hop

Trees Are Even More Amazing Than We Realized

Trees, is there anything they can’t do? Doubtful. Let’s see: producing half the world’s oxygen, providing habitat for millions of species, creating …

Adventure on the Danube

In 1958, Inge Morath set out to document the cultures of Central and Eastern Europe. Spanning four decades, her monumental project was the quest of a …

New 'Time Slice' Theory Suggests You're Not as Conscious as You Think You Are

Our conscious perception of the world feels like a continuous and uninterrupted flow, but a new study suggests that it’s actually more like the …

This neural network ‘hallucinates’ the right colors into black and white pictures

The machine overlords of the future may now, if it pleases them, eliminate all black and white imagery from the history of their meat-based former masters. All they’ll need is this system from Berkeley computer scientist Richard Zhang, which allows a soulless silicon sentience to “hallucinate” …