Health | Forum

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Problems Rules

Wish / ProblemWhy?

[Results]"I wish this thing be like that..."

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| (19284) Personalized Diet : How to discover what foods are good for each individual?
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| (19268) Extreme Health : Why should health improvement ever stop?
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| (19160) Choosing Nootropics : How to optimize choice of smart drugs, individually?
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| (18991) Artifcial Blood : How to create artificial blood?

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Solutions Rules

Method / PrincipleHow?

[Results]"I found a way this could work..."

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■ (19298) Movable Frame Tetris : Instead of moving the falling brick, move the entire tetris frame in the rain of tetris parts; make the frame walls semi-permeable sometimes, and emulate life form eating bricks, and medical interventions to alleviate clogging.
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| (19264) Oximeter Popularization via Handbands : Just like smoke alarms, but for human bodies.
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■ (19254) HiveCell : Universal Beehive Cell-like Capsule-Hotel-like Car Connectable into Buildings and Spaces
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■ (19250) Diagnostic Mosquitoes as Body Boring Machines : Evolve mosquitoes with long proboscises, then photolitographically print a microcircuit to interface with their brain, connect and train a neural net to control it.
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| (19246) Shapeflow : Generalization of Tetris: A strategic game with a variety of morphing shapes flowing through topological holes (like digestive tract) with increasing variety and speed, and complementaries (like matching Tetris bricks) that interact to break down into smaller ones, and a global goal to sustain their flow from clogging the system.

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Projects Rules

Work / ActivityWhat?

[Results]"Here's what I did, and will do next..."

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| (18990) Biopoints of Failure : Let's create an on-line list of bio-points of failure:

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Activity

o-92001

15 dweeks 1 days ago I implemented column hashing @ Postgres synchronization solution

I implemented a hash that takes previous data and current column and the previous hash to produce a hash of the entire database.

This allows us to synchronize with the minimum of data transmissions when I write the synchronizer part which shall rehash all its own data, then retrieve the hash of a binary search of the sorted data.

—chronological

-3.0000 ħ (3.0 HUR) (+0.0)

o-91001

15 dweeks 2 days ago I implemented document storage in my database project @ Document database backed by keyvalue storage

I spent a few hours working on the remainder of this problem and got documnent retrieval working after finishing save document.

This lets you save and retrieve JSON documents

The document data inserted is also queryable by SQL.

Joins against documents are not yet supported but I plan to implement this.

—chronological

-4.0000 ħ (4.0 HUR) (+0.0)

16 dweeks 1 days ago For 100 threads I managed to get 100 million multithread communication event requests a second, taking 10 nanoseconds to communicate between threads @ Parallel multithreaded actors without locks

Most computers use locks to synchronize, which are very slow. This design is far faster and allows locks to be elided for performance.

I use unscynchronized data structures and achieve 100 million requests a second raw communication performance for a cost of 10 nanoseconds per batch of messages.

—chronological

-8.0000 ħ (8.0 HUR) (+0.0)

16 dweeks 2 days ago Saving JSON documents as SQL @ Document database backed by keyvalue storage

I managed to store a JSON document and I used the SQL inserter to insert the document. In theory the object is queryable by SQL

{ "items": [("name": "item1"), ("name": "item2")], "subobject": {"subobject_key": "value"} }

—chronological

-3.0000 ħ (3.0 HUR) (+0.0)

17 dweeks 1 days ago I updated epollserver to multiplex client sockets across threads. @ Efficient multithreaded server

The idea is that each thread has a ringbuffer, when a socket is accepted, a message is put on the ringbuffer and the thread begins listening to that user.

All the other threads are notified of all the users so they can also echo data to them.

This is efficient as a thread can serve thousands-millions of connections and there are multiple threads.

One problem, which is a generic problem for multithreading is servicing one of multiple kinds of events from one thread. I rely on the fact I am polling a ringbuffer and epoll.

—chronological

-7.0000 ħ (7.0 HUR) (+0.0)