Farming Amoebae Carry Around Detoxifying Food

“Brainprint” Biometric ID Hits 100% Accuracy

Psychologists and engineers at Binghamton University in New York say they’ve hit a milestone in the quest to use the unassailable inner workings of the mind as a form of biometric identification. They came up with an electroencephalograph system that proved 100 percent accurate at identifying individuals by the way their brains responded to a series of images. But EEG as a practical means of authentication is still far off.

Many earlier attempts had come close to 100 percent accuracy but couldn’t completely close the gap. “It’s a big deal going from 97 to 100 percent because we imagine the applications for this technology being for high-security situations,” says Sarah Laszlo, the assistant professor of psychology at Binghamton who led the research with electrical engineering professor Zhanpeng Jin.

Perhaps as important as perfect accuracy is that this new form of ID can do something fingerprints and retinal scans have a hard time achieving: It can be “canceled.”

Fingerprint authentication can be reset if the associated data is stolen, because that data can be stored as a mathematically transformed version of itself, points out Clarkson University biometrics expert Stephanie Schuckers. However, that trick doesn’t work if it’s the fingerprint (or the finger) itself that’s stolen. And the theft part, at least, is easier than ever. In 2014 hackers claimed to have cloned German defense minister Ursula von der Leyen’s fingerprints just by taking a high-­definition photo of her hands at a public event.

Several early attempts at EEG-based identification sought the equivalent of a fingerprint in the electrical activity of a brain at rest. But this new brain biometric, which its inventors call CEREBRE, dodges the cancelability problem because it’s based on the brain’s responses to a sequence of particular types of images. To keep that ID from being permanently hijacked, those images can be changed or re-sorted to essentially make a new biometric passkey, should the original one somehow be hacked.

CEREBRE, which Laszlo, Jin, and colleagues described in IEEE Transactions in Information Forensics and Security, involves presenting a person wearing an EEG system with images that fall into several cate­gories: foods people feel strongly about, celebrities who also evoke emotions, simple sine waves of different frequencies, and uncommon words. The words and images are usually black and white, but occasionally one is presented in color because that produces its own kind of response.

Each image causes a recognizable change in voltage at the scalp called an event-related potential, or ERP. The different categories of images involve somewhat different combinations of parts of your brain, and they were already known to produce slight differences in the shapes of ERPs in different people. Laszlo’s hypothesis was that using all of them—several more than any other system—would create enough different ERPs to accurately distinguish one person from another.

The EEG responses were fed to software called a classifier. After testing several schemes, including a variety of neural networks and other machine-learning tricks, the engineers found that what actually worked best was a system based on simple cross correlation.

In the experiments, each of the 50 test subjects saw a sequence of 500 images, each flashed for 1 second. “We collected 500, knowing it was overkill,” Laszlo says. Once the researchers crunched the data they found that just 27 images would have been enough to hit the 100 percent mark.

The experiments were done with a high-quality research-grade EEG, which used 30 electrodes attached to the skull with conductive goop. However, the data showed that the system needs only three electrodes for 100 percent identification, and Laszlo says her group is working on simplifying the setup. They’re testing consumer EEG gear from Emotiv and NeuroSky, and they’ve even tried to replicate the work with electrodes embedded in a Google Glass, though the results weren’t spectacular, she says.

For EEG to really be taken seriously as a biometric ID, brain interfaces will need to be pretty commonplace, says Schuckers. That might yet happen. “As we go more and more into wearables as a standard part of our lives, [EEGs] might be more suitable,” she says.

But like any security system, even an EEG biometric will attract hackers. How can you hack something that depends on your thought patterns? One way, explains Laszlo, is to train a hacker’s brain to mimic the right responses. That would involve flashing light into a hacker’s eye at precise times while the person is observing the images. These flashes are known to alter the shape of the ERP.

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Free Online Language Courses

*UPDATED* Here is a masterpost of MOOCs (massive open online courses) that are available, archived, or starting soon. Some are short, some are very interactive, some are very in-depth. I think they will help those that like to learn with a teacher or with videos. I checked each link to make sure they are functioning.

Spanish

Beginner 

AP Spanish Language & Culture

Basic Spanish for English Speakers

Beginner’s Spanish:Food & Drink

Fastbreak Spanish

How to Self-Study Spanish

Preparing for the AP Spanish Exam 

Spanish for Beginners

Intermediate 

Spanish:Ciudades con Historia

Spanish:Espacios Públicos 

Advanced

Corrección, Estilo y Variaciones

La Innovación Social  (Check under Translation)

Leer a Macondo (Taught in Spanish)

Spanish:Con Mis Propias Manos

Spanish: Perspectivas Porteñas

Reading Spanish Literature

French

Beginner

AP French Language and Culture

Basic French Skills

Beginner’s French: Food & Drink

Diploma in French

Elementary French I

Elementary French II

Français Interactif

French in Action

French Language Studies I

French Language Studies II

French Language Studies III

French:Ouverture

French Through Stories and Conversation

Improving Your French

Mastering French Grammar and Vocab

Intermediate

French: Le Quatorze Juillet

Passe Partout

Advanced

Fantasy, de l'Angleterre Victorienne au Trône de fer

La Cité des Sciences et de Industrie

Les Chansons des Troubadours

Reading French Literature

Portuguese

Brazilian Portuguese for Beginners

Curso de Português para Estrangeiros

Italian

Beginner

Beginner’s Italian: Food & Drink

Beginner Italian I

Introduction to Italian

Oggi e Domani

Survive Italy Without Being Fluent

Intermediate

Intermediate Italian I

Advanced 

Advanced Italian I

Italian Literature 

Italian Novel of the Twentieth Century 

L'innovazione Sociale (Check language under translation)

Reading Italian Literature

Catalan

Intro to Catalan Sign Language

Latin

Latin I (Taught in Italian)

Russian

Beginner

Basics of Russian

Easy Accelerated Learning for Russian

Russian Alphabet

Russian Essentials

Russian for Beginners

Russian Level I

Russian Phonetics and Pronunciation

Reading and Writing Russian

Travel Russian

Advanced

Business Russian  (must register)

Let Us Speak Russian  (must register)

Reading Master and Margarita

Russian as an Instrument of Communication

Siberia: Russian for Foreigners

Ukrainian

Read Ukrainian

Ukrainian Language for Beginners

Kazakh

A1-B2 Kazakh (Taught in Russian)

Chinese

Beginner

Basic Chinese

Basic Mandarin Chinese I

Basic Mandarin Chinese II

Beginner’s Chinese

Chinese for Beginners

Chinese Characters

Chinese for Travelers

Chinese is Easy

Chinese Made Easy

Easy Mandarin 

First Year Chinese I

First Year Chinese II

Learn Oral Chinese 

Mandarin Chinese I

Start Talking Mandarin Chinese

UT Gateway to Chinese

Intermediate

Intermediate Business Chinese

Intermediate Chinese

Intermediate Chinese Grammar

Japanese

Beginner’s Conversational Japanese

Genki

Japanese JOSHU

Learn 80 JLPT N5  Kanji I

Learn 80 JLPT N5  Kanji II

Learn 80 JLPT N5  Kanji III

Learn 80 JLPT N5  Kanji IV

Korean

Beginner

First Step Korean

How to Study Korean

Pathway to Spoken Korean

Intermediate

Intermediate Korean

Dutch

Introduction to Dutch

German

Beginner

Basic German

Basic Language Skills

Beginner’s German: Food & Drink

Conversational German I

Conversational German II

Conversational German III

Conversational German IV

Deutsch im Blick

Diploma in German

German A1 Grammar

German Alphabet

German Modal Verbs

Present Tense German

Rundblick-Beginner’s German

Study German Language from Native Speakers

Advanced

German:Regionen Traditionen und Geschichte

Landschaftliche Vielfalt

Reading German Literature

Norwegian

Learn The Norwegian Language

Norwegian on the Web

Swedish

Intro to Swedish

Finnish

A Taste of Finnish

Basic Finnish

Finnish for Immigrants

Finnish for Medical Professionals

Frisian

Introduction to Frisian  (Taught in Dutch)

Icelandic

Icelandic 1-5

Arabic

Arabic for Global Exchange (in the drop down menu)

Arabic Language for Beginners

Arabic Without Walls

Conversational Arabic Made Easy

Intro to Arabic

Lebanese Arabic

Madinah Arabic

Moroccan Arabic

Read Arabic

Hebrew

Hebrew Alphabet Crashcourse

Know the Hebrew Alphabet

Hindi

A Door into Hindi

Business Hindi

Virtual Hindi

Indonesian

Learn Indonesian

Nepali

Beginner’s Conversation and Grammar

Welsh

Beginner’s Welsh

Discovering Wales

Irish

Introduction to Irish

Multiple Languages

http://ocw.mit.edu/courses/global-studies-and-languages/ : MIT’s open courseware site has assignments and course material available.

I’ll keep an eye out for new courses and if you know of any, let me know so I can update this list.

Last updated: February 19, 2016

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The Pirate Queen of the South China Sea

The Red Flag Fleet under Ching Shih’s rule went undefeated, despite attempts by Qing dynasty officials, the Portuguese navy, and the East India Company to vanquish it. After three years of notoriety on the high seas, Ching Shih finally retired in 1810 by accepting an offer of amnesty from the Chinese government. Ching Shih died in 1844, at the ripe old age of 69.At the dawn of the 1800s, a former prostitute from a floating brothel in the city of Canton was wed to Cheng I, a fearsome pirate who operated in the South China Sea in the Qing dynasty. Though the name under which we now know her, Ching Shih, simply means “Cheng’s widow,” the legacy she left behind far exceeded that of her husband’s. Following his death, she succeeded him and commanded over 1,800 pirate ships, and an estimated 80,000 men.

Her husband, Ching I, was the formidable commander of the Red Flag Fleet of pirate ships. He married a 26-year-old Ching Shih in 1801. She quickly took to the pirate life and when Ching I died six years later, Ching Shih wasn’t going to let Ching I’s adopted son, Cheung Po Tsai take over.  Cheung Po Tsai, however, was more than just Ching Shih’s adopted son –-  the young man had also been Ching I’s lover.

Keep reading

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The Icelandic Language still uses the letters Þ and Ð, which used to be in the English alphabet too but which fell into disuse and were eventually left out altogether. Their pronunciation is the sound made by the “th” in “this” and “that” respectively.

Incidentally, the Þ was not included in early English printing press types. As a substitute they used y, which looks somewhat similar. Thus was the popular misconception born that English people used to say “ye” as in “ye old shoppe.”

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12 snipers from the Soviet 3rd Shock Army with 775 confirmed kills. Germany, May 4th 1945.

via reddit

Keep reading

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(Image caption: The maturation of fibres of a brain structure called the arcuate fascicle (green) between the ages of three and four years establishes a connection between two critical brain regions: a region (brown) at the back of the temporal lobe that supports adults thinking about others and their thoughts, and a region (red) in the frontal lobe that is involved in keeping things at different levels of abstraction and, therefore, helps us to understand what the real world is and what the thoughts of others are. Credit: © MPI CBS)

The importance of relating to others: why we only learn to understand other people after the age of four

When we are around four years old we suddenly start to understand that other people think and that their view of the world is often different from our own. Researchers in Leiden and Leipzig have explored how that works. Publication in Nature Communications on 21 March.

At around the age of four we suddenly do what three-year-olds are unable to do: put ourselves in someone else’s shoes. Researchers at the Max Planck Institute for Human Cognitive and Brain Sciences (MPI CBS) in Leipzig and at Leiden University have shown how this enormous developmental step occurs: a critical fibre connection in the brain matures. Senior researcher and Leiden developmental psychologist Nikolaus Steinbeis, co-author of the article, took part in the research. Lead author, PhD candidate Charlotte Grosse-Wiesmann, worked under his supervision.

Little Maxi

If you tell a 3-year-old child the following story of little Maxi, they will most probably not understand: Maxi puts his chocolate on the kitchen table, then goes to play outside. While he is gone, his mother puts the chocolate in the cupboard. Where will Maxi look for his chocolate when he comes back? A 3-year-old child will not understand why Maxi would be surprised not to find the chocolate on the table where he left it. It is only by the age of 4 years that a child will correctly predict that Maxi will look for his chocolate where he left it and not in the cupboard where it is now.

Theory of Mind

The researchers observed something similar when they showed a 3-year-old child a chocolate box that contained pencils instead of chocolates. When the child was asked what another child would expect to be in the box, they answered “pencils”, although the other child would not know this. Only a year later, around the age of four years, however, will they understand that the other child had hoped for chocolates. Thus, there is a crucial developmental breakthrough between three and four years: this is when we start to attribute thoughts and beliefs to others and to understand that their beliefs can be different from ours. Before that age, thoughts don’t seem to exist independently of what we see and know about the world. That is, this is when we develop a Theory of Mind.

Independent development

The researchers have now discovered what is behind this breakthrough. The maturation of fibres of a brain structure called the arcuate fascicle between the ages of three and four years establishes a connection between two critical brain regions: a region at the back of the temporal lobe that supports adult thinking about others and their thoughts, and a region in the frontal lobe that is involved in keeping things at different levels of abstraction and, therefore, helps us to understand what the real world is and what the thoughts of others are. Only when these two brain regions are connected through the arcuate fascicle can children start to understand what other people think. This is what allows us to predict where Maxi will look for his chocolate. Interestingly, this new connection in the brain supports this ability independently of other cognitive abilities, such as intelligence, language ability or impulse control.

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Can the brain feel it? The world’s smallest extracellular needle-electrodes

A research team in the Department of Electrical and Electronic Information Engineering and the Electronics-Inspired Interdisciplinary Research Institute (EIIRIS) at Toyohashi University of Technology developed 5-μm-diameter needle-electrodes on 1 mm × 1 mm block modules. This tiny needle may help solve the mysteries of the brain and facilitate the development of a brain-machine interface. The research results were reported in Scientific Reports on Oct 25, 2016.

(Image caption: Extracellular needle-electrode with a diameter of 5 μm mounted on a connector)

The neuron networks in the human brain are extremely complex. Microfabricated silicon needle-electrode devices were expected to be an innovation that would be able to record and analyze the electrical activities of the microscale neuronal circuits in the brain.

However, smaller needle technologies (e.g., needle diameter < 10 μm) are necessary to reduce damage to brain tissue. In addition to the needle geometry, the device substrate should be minimized not only to reduce the total amount of damage to tissue but also to enhance the accessibility of the electrode in the brain. Thus, these electrode technologies will realize new experimental neurophysiological concepts.

A research team in the Department of Electrical and Electronic Information Engineering and the EIIRIS at Toyohashi University of Technology developed 5- μm-diameter needle-electrodes on 1 mm × 1 mm block modules.

The individual microneedles are fabricated on the block modules, which are small enough to use in the narrow spaces present in brain tissue; as demonstrated in the recording using mouse cerebrum cortices. In addition, the block module remarkably improves the design variability in the packaging, offering numerous in vivo recording applications.

“We demonstrated the high design variability in the packaging of our electrode device, and in vivo neuronal recordings were performed by simply placing the device on a mouse’s brain. We were very surprised that high quality signals of a single unit were stably recorded over a long period using the 5-μm-diameter needle,” explained the first author, Assistant Professor Hirohito Sawahata, and co-author, researcher Shota Yamagiwa.

The leader of the research team, Associate Professor Takeshi Kawano said: “Our silicon needle technology offers low invasive neuronal recordings and provides novel methodologies for electrophysiology; therefore, it has the potential to enhance experimental neuroscience.” He added, “We expect the development of applications to solve the mysteries of the brain and the development of brain–machine interfaces.”

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Awesome things you can do (or learn) through TensorFlow. From the site:

A Neural Network Playground

Um, What Is a Neural Network?

It’s a technique for building a computer program that learns from data. It is based very loosely on how we think the human brain works. First, a collection of software “neurons” are created and connected together, allowing them to send messages to each other. Next, the network is asked to solve a problem, which it attempts to do over and over, each time strengthening the connections that lead to success and diminishing those that lead to failure. For a more detailed introduction to neural networks, Michael Nielsen’s Neural Networks and Deep Learning is a good place to start. For more a more technical overview, try Deep Learning by Ian Goodfellow, Yoshua Bengio, and Aaron Courville.

GitHub

h-t FlowingData

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Awesome infographic work by designer Yang Liu. Check out her book ’East Meets West’ (Amazon).

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Once Upon a Time t

Once upon the time t(0) there was a young buck named Butterbean who wanted nothing more than to know his ontological value.  Being familiar with the concepts of quantum mechanics he was sadly aware that this was theoretically impossible, but remained unsatisfied with the notion.

In an undying effort to discover the nature of his own existence he set out on a journey to seek the answer from all those most wise and perceiving.

Clearly the first stop was at the front door of Glad the hippopotamus.    

Glad was of the notion that all things are ultimately mundane and that it is simply a matter of time and “progress” before esoteric conundrums become  simple everyday knowledge.  Surely this most assured creature could derive an unknown variable to discover the true nature of Butterbean himself. They were both of the mind at this time t(realist) that all the probabilistic nonsense was clearly just a cop out for those ninnies who fancied themselves finished with discovering the universe.

Alas after decades, or maybe days (no one can be sure given that time itself is a construct  commonly defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom, and who can really say cesium 133 even exists… really), Glad was forced to admit that he could not tell Butterbean of his ontological state prior to Butterbean’s arrival on his doorstep, nor could he possibly without any reference to his own experience as a literalist hippo,  and was forced to admit that this coveted obscure variable was beyond his abilities of perception.

With a sense of hopelessness Butterbean sought out the comfort and guidance of Ol’ Trusty, the Wire Stripper.  They adventured together for t(hedonist) to t(fundamentalist) without ever committing to any defined notion as after all, how can you find the answer to a paradox, oxymoron much?  

However comfort in ignorance becomes unsettling after you’ve had your fun and Butterbean became restless.  There was one more known avenue he had not yet travelled…

With a renewed sense of wonder and determination Butterbean approached the Oak, which shook its branches excitedly upon Butterbean’s arrival to see such a valiant seeker of answers.  “Oak, what can you tell me about my ontological value?” asked Butterbean humbly.  The Oak remained silent, but a slight breeze rustled loose a few leaves from its massive head which fluttered to the ground and landed lightly at Butterbean’s feet, Butterbean faltered and then turned and retreated thoughtfully sensing that the conversation was over. 

Upon further consideration over Δt(orthodox) Butterbean understood Oak’s lesson— the leaves could change position through many methods all resulting in different outcomes, however before any leaf falls, it has not fallen.  Butterbean had discovered that no matter who or what observes him, there would be an outcome, but it could not be these interactions which defined the whole of himself, surely he must be something inherently like the leaves of Oak’s mane.  

One day, a little time later at approximately t(decision), Butterbean decided to venture forth in search of a method of measurement that excluded observation.  Knowing that the existence of alligators had long been debated among those with a higher understanding of the nature of things, he knew he should seek within the mind of that which may or may not exist; namely an alligator (though a unicorn or manticore could have sufficed, they are not quite as easy to find nowadays).

Unfortunately all alligators are actually just dead trees and Butterbean had to once again rethink his strategy. 

It occurred to Butterbean, after his most recent experiences, that perhaps his disbelief in alligators had caused their value to be null, distracted in hoping that his mind was not quite that powerful Butterbean mistakenly stomped on a daisy which let out a loud squeal, “watch out dummy!”  “OH!” replied Butterbean, “Sorry I didn’t see you there, though come to think of it I’m surprised you even exist as I hadn’t yet observed you my friend.”   The daisy straightened herself and smoothing out her petals scoffed and said jeeringly, “you think that you are the only one who exists, eh?”  “Well,” began Butterbean thoughtfully, “no, but I don’t understand how anything or anyone has any sort of defined nature without something else purposefully interacting with it, after all, how do you know that you exist?” “Oh for goodness sake,” exclaimed young Daisy, “Of course you’ll remain limited as long as you keep collapsing your wave function with all that introspection!”  And she turned her face to the sun clearly dismissing Butterbean and all his angsty questions.  

Butterbean, with all known theories exhausted, was still unsatisfied and longed to know the mystery of his own nature of being and the recent dismissal of the daisy weighed heavy on his soul.  “Why can she be so satisfied just being,” he wondered, “when I spend all of my time dedicated to the mystery and nature of life but still feel so empty and unfulfilled?”  And suddenly it struck him! It had been so obvious all along and basically verbatim the retorts he had only just received from the annoyed flower he had trod on, Butterbean ceased to observe himself and existed infinitely in all possible states of being.

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