Java grafieken voor Opendata

[quote=“alkema_jm, post:66, topic:354”]
Kijk maar naar de patiëntendossier sites. Ze zitten te zoeken (“snakken”) naar een oplossing. Denk hierbij aan dat wij aan dezelfde vooravond staan als wat bij de revolutie van de Netscapebrowser is ontstaan. Nadat ze het hebben gemaakt, ging iedereen met hun (http) protocol aan de haal smile[/quote]

De “vooravond van een nieuwe revolutie” analoog aan de opkomst van Internet en het World Wide Web?

You’ll Never Walk Alone:

De laatste link komt van Wikipedia maar daar is het rond het lemma ‘blockchain’ nog niet uitgekristalliseerd:

The page "Blockchain" does not exist. You can ask for it to be created, but consider checking the search results below to see whether the topic is already covered.

Een van Wikipedia’s “Search results” verwijst wel naar een artikel ‘block chain’ met een spatie:

Block chain (transaction database)

A block chain is a distributed data store that holds a public ledger of transactions in cryptocurrencies, such as bitcoin. This record is enforced cryptographically and hosted on machines running the software.

The technology forms the basis of all cryptocurrencies.

Decentralisation [edit]

Every node in a cryptocurrency has a complete or partial copy of the block chain. This avoids the need to have a centralized database that other systems, such as PayPal , require.[3] Whereas a conventional ledger records the transfers of actual bills or promissory notes that exist apart from it, the block chain is the only place that bitcoins can be said to exist in the form of unspent outputs of transactions.

Transactions of the form payer X sends Y currency to payee Z are broadcast to this network using software applications. Network nodes can validate transactions, add them to their copy of the ledger, and then broadcast these ledger additions to other nodes.

Double spend solution [edit]

Cryptocurrencies use various timestamping schemes, such as proof-of-work, to avoid the need for a trusted third party to timestamp transactions added to the block chain. This avoids everyone double-spending the currency.

Developments [edit]

Developments from the first implementation, bitcoin, have built additional features for performance, anonymity, storage and smart contracts.

This finance-related article is a stub. You can help Wikipedia by expanding it.

Bij de overige resultaten van in Wikipedia op “blockchain” zoeken veel Bitcoin-terminologie. Toch zag ik daar een of twee onderwerpen tussen staan die jou misschien interesseren:

Michael F Smith

development of large-scale, web-based clinical information systems and blockchain technology. Some of his publications: Computer Systems in Healthcare - 17 May 2015

En:

Cooperative storage cloud

MIT’s Chord. Another example is Storj. Storj is based on the Bitcoin blockchain technology and peer-to-peer protocols to provide cloud storage to people - 26 May 2015

Wat Storj aan het doen is ziet er wel “revolutionair” uit:

Decentralized Cloud Storage

Storj is based on blockchain technology and peer-to-peer protocols to provide the most secure, private, and encrypted cloud storage.

Ze gaan voor de tweede keer proefdraaien met DriveShare:

How much will I make from DriveShare?

How about a PC with 1TB free, and 3 additional 4TB hard drives. The cost of running this node is $5.94 + (3 * $6.02) = $24/month. This node has 13 TB of space to lend, at around $0.0070/GB/month. Monthly revenue is around $91, making an easy $67 monthly profit. At that rate, you can pay off your investment in the hard drives in just 7 months, and the rest is pure profit.

What about an enterprising user with a spare Raspberry Pi? You could easily hook up a few 2TB external drives, and take advantage of the Pi’s low power usage. At only 5W, the Pi’s electricity cost for a month is only $0.43. That’s an extra $5 monthly cost chopped off.

blog.storj.io