jackrobison

>Right, so nothing stops you from altering the search results at will, which is the most critical part of the system in my opinion.

You don't use the search server to perform resolution of claims, the search engine gives names that you then look up yourself. The resolve operations are provided by the SPV server, it cannot falsify results sent the the client as the client validates everything it gets (if the claim is winning this includes a proof that it is winning at the current block height). The server (like other SPV servers) could in some cases omit records/return false negatives, but it cannot alter them.

The SPV server is also open source and you can configure lbrynet to use whichever server you want, you don't need to use the default operated by us.

>Okay, so for a use case like The Pirate Bay, which is a popular database of magnet links and related metadata (Description, who added to the database, when added, etc). Users search this data in various ways.

The problem with this search index is that it requires all of the .torrent files containing the metadata. In lbry this metadata (as well as more rich fields) are stored to the blockchain, so any full blockchain node has the information to provide more sophisticated searches. Chainquery is what runs a full node and provides the search engine for the UI (https://github.com/lbryio/chainquery).

>As in, how would a user search it or find popular torrents?

As indicated above, if they're using the UI it provides a search engine via chainquery. Torrents are also not a currently supported source type for a download, however there is nothing to stop it from being added.

The metadata stored in the blockchain contains a hash to the header blob of data for the stream. Peers for this header and later data blobs are found on the lbry DHT. Once peers are found the blobs are downloaded over a tcp based protocol.

You should check out the forums on wrongplanet.net

>What brain region did they stimulate?

During the experiment the sequence of regions was switched up between us, I'm not sure we even all had the exact same set of regions tested. They tested many regions, from the frontal cortex to the motor cortex.

>And what kind of TMS parameters？It must have been repetitive TMS, at what frequency？

They were targeting a 1cm^3 portion of the brain with something like 2 pulses per second. I'm not sure what the frequency of the magnetic field in the pulses was, I think fairly high.

For me, the strongest effect was after one particular region (they tested many), in this TMS study they were targeting 1cm^3 of the brain at a time. The effect that was most pronounced for me was a greatly enhanced sense of sound after one of the regions was targeted. I'm already an auditory thinker, I can remember dialogs, sounds, etc and re-listen to them in my mind. I don't visualize easily at all. I first noticed the effect while walking around Boston on a break from testing, and being somewhat overwhelmed by the distinctness of all of the sounds around me - the people walking and talking, the engines of the taxis, the birds, etc. Each was like a separate track that I could isolate and focus on. As I said, I already think of myself as being a strongly auditory thinker, but it was like this dial had been turned up to 11. I vividly remember driving back from the TMS lab while listening to a live performance and easily counting how many singers were in the chorus. This wasn't permanent, but very memorable.

The regions they target have fairy specific effects. While the most memorable to me dealt with sound, another memorable one made us measurably faster at responding to an emotional categorization test. In this test you have a picture of part of a face (eyes or mouth) flashed in front of you for a split second, and you have to decide which of several emotions it represents as quickly as you can.

In short, TMS can affect vastly more than just emotional blindness. But the research is still young, and it's going to take time for it to be further developed into its full potential.

My fathers newest book - Switched On - is all about TMS and his experience. The research is being led by Alvero Pascual-Leone at Harvard medical, he's got a lot of material published.

How it pertains to autism is very new, I'm not sure what the team has published yet. The finding that I thought was most significant is that TMS provides an instrumental test for autism - although there's a ways to go before it becomes the means of diagnosis. An autistic person has measurably different neuroplasticity than a non autistic person, this low level biological distinction has the potential to take subjectivity out of diagnosis. And it is a big step towards a low level understanding of what autism is, how it can pan out to be a gift or a disability (not mutually exclusive), and how the challenges many autistic people face work on a fundamental level.

I didn't know HN was interested in the subject, very neat!

I'll keep up on this thread, and if anyone wants to ask me a question via email you can reach me at [email protected]