Journals


This Crystal Mimics Learning and Forgetting - Facts So Romantic

Nautilus

There's also forgetting--when you have limited space for memory, it's vital to be able to make room for new memories, and SNO can do that, too: After a period of time without exposure to hydrogen, SNO's electric resistance decreases. SNO may be the first synthetic material to both habituate and gradually forget--organism-like properties strange to witness in a lifeless, synthetic crystal. Unable to forget 0 when shown another digit, the STDP algorithm muddled 0 and 1, and then, shown the next digit, muddled all three. But the second algorithm, called adaptive synaptic plasticity (ASP), used SNO's ability to remember and gradually forget information and was able to represent each successive digit with little trouble.


Your Next New Best Friend Might Be a Robot - Issue 52: The Hive

Nautilus

She is an artificially intelligent software program designed to chat with people, called a chatbot. For example, when we input the picture below into a traditional computer's visual recognition system, it produces a cognitive answer: "There's an ankle in the image." In this sense, Xiaoice is a big data project, built on top of the Microsoft Bing search engine, which holds 1 billion data entries and 21 billion relationships among those entries. Microsoft has made many technology breakthroughs in developing its chatbot technology, such as detecting facial expressions and searching for and identifying emotional features in text.


A cargo-sorting DNA robot

Science

We developed a simple algorithm and three modular building blocks for a DNA robot that performs autonomous cargo sorting. The robot explores a two-dimensional testing ground on the surface of DNA origami, picks up multiple cargos of two types that are initially at unordered locations, and delivers each type to a specified destination until all cargo molecules are sorted into two distinct piles. On average, our robot performed approximately 300 steps while sorting the cargos. The number of steps is one to two magnitudes larger than the previously demonstrated DNA robots performing additional tasks while walking.


A Simple Visual Proof of a Powerful Idea in Graph Theory - Facts So Romantic

Nautilus

Ramsey's theorem states that in any graph where all points are connected by either red lines or blue lines, you're guaranteed to have a large subset of the graph that is completely uniform--that is, either all red or all blue. Ramsey's theorem states that somewhere out there there's a graph in which a subset of that size must arise. Again, to avoid a red triangle, we have to color that edge blue. In larger graphs--cases with a million people, or many billion--Ramsey's theorem guarantees that all points in some vast subset of the graph will be connected with lines of the same color.


Memories of past morphologies

Science

When developing neurons round and divide during neuronal differentiation, daughter cells tend to take up the same morphology exhibited by their mother. These neurons differentiate from neural crest cells (NCCs) generated by bipolar progenitors. Bipolar NCCs lost their polarity and retracted their processes to round for division. The daughter neurons directly acquired bipolar morphology by emitting processes in the same location.


Wire together, fire apart

Science

It has been widely accepted that memories are formed and stored via strengthening of neural connections due to the correlated activities of neurons, where presumably one neuron is causing or at least contributing to the activity of another connecting neuron and hence becomes associated with it. This principle is known as the Hebbian learning rule (1): i.e., if interconnected neurons become active very close in time during a particular event, their connection strengthens and "a memory" of this event is formed (1). Thus, neural connection must show some sort of plasticity--i.e., an ability to be modified based on the mutual firing patterns of interconnected neurons--in order to form memories and associations. Indeed, it has been shown that brief (hundreds of milliseconds) stimulations of interconnected neurons significantly improve signal transmission between the two, a phenomenon known as long-term potentiation (LTP).


Astro Teller on Why Artificial Intelligence Is Not Scary

The Atlantic

"Taking over the world is an intensely human thing to want to do," says Astro Teller, in a short interview conducted at the 2017 Aspen Ideas Festival. At Google X, Teller studies and develops artificial intelligence. Here, he argues that current frenzy over the topic might be overblown.


What Should We Call Silicon Valley's Unique Politics?

The Atlantic

The "do not regulate" category was formed from responses to questions about regulating Uber, how the gig economy should be structured, whether it is too hard to fire workers, and the general proposition of whether "government regulation of business does more harm than good," as well as specific questions about regulating drones, self-driving cars, and internet companies. For example, 80 percent of tech founders think economic inequality is fine if it means the economy grows faster and 75 percent of tech founders think labor unions should lose influence. And yet, when the researchers asked the tech founders about taxation and redistribution policies, they expressed major support for things like "universal healthcare, even if it means raising taxes," increases in spending on the poor, and taxes on high-income individuals. If tech founders had their way, government regulation might not stop you from financially falling through market action, but it'd bounce you back up.


Vol 31, No 3

AI Magazine

The purpose of AI Magazine is to disseminate timely and informative articles that represent the current state of the art in AI and to keep its readers posted on AAAI-related matters. The articles are selected for appeal to readers engaged in research and


Why A.I. Is Just Not Funny - Facts So Romantic

Nautilus

Researchers from Rutgers University, Facebook, and the College of Charleston have developed a system for generating original art called C.A.N. In a 2017 paper in arXiv, the scientists report that "human subjects could not distinguish art generated by the proposed system from art generated by contemporary artists and shown in top art fairs." It improves its routine via a machine learning technique called reinforcement learning: Much like a human comic using trial-and-error, Zoei maximizes the "reward" (laughter or a positive response) for its jokes by exploring its options and exploiting the best one. According to Jonah Katz and David Pesetsky, from West Virginia University and M.I.T., respectively, these building blocks consist of "arbitrary pairings of sound and meaning in the case of language; pitch-classes and pitch-class combinations in the case of music."