HOW BLOCKCHAIN TECHNOLOGY CAN ENHANCE EHR OPERABILITY An Original Research White Paper by ARK Invest + Gem In healthcare, information is not only private, it is proprietary.While doctors and patients yearn for a digital and unified patient record, the infrastructure required to accomplish this doesn’t exist yet.A blockchain could be a public catalog of health records that references databases, fitness and medical devices, mobile phones, and laptops.It could be used to connect every patient, healthcare provider, and payer to a secure, yet public network.A blockchain also could enable the interoperability of private health networks.Users would be able to trust the blockchain infrastructure in a healthcare context because it would automate the integrity of the data exchange.Not only would users know if their data had been manipulated, they would see exactly how it was done.Chris Burniske PRODUCTS LEAD | ARK INVEST Chris serves as Blockchain Products Lead at ARK Invest, working on both research and business development.

In 2015, ARK Invest became the first public fund manager to invest in bitcoin, offering the first two ETFs with bitcoin exposure.Chris frequently appears in media outlets including Forbes, CNBC, Bloomberg, Reuters, CoinDesk and more.He graduated Phi Beta Kappa with a BS from Stanford.EMILY VAUGHN DIRECTOR OF CLIENT SERVICES AND MARKETING | GEM Emily leads Gem Health, the healthcare blockchain initiative, and oversees Gem's client education, partnerships, public relations, and marketing.Gem Health is a blockchain network for the global community of companies and individuals that take part in the continuum of care.Blockchain technology addresses the trade-off between personalized care and operational costs by connecting the ecosystem to universal infrastructure.Shared infrastructure allows us to create global standards without compromising privacy and security.JEFF SHELTON DIRECTOR OF PRODUCT | GEM Jeff serves as the Director of Product for Gem's blockchain application platform.

In this capacity, he oversees core feature development to architect systems that enable and enhance business processes across a network of organizations.Gem's blockchain application platform transforms the way companies and industries connect to solve impossible problems by establishing levels of trust and transparency that will inspire new business models and services.DR. ALEX CAHANA, MD, MAS, FIPP As a Theme Developer for ARK’s Genomic Revolution theme, Alex focuses on the impact of technological innovations within the healthcare industry.Alex is the Director of Medical Affairs at the Center for Lawful Access and Abuse Deterrence (CLAAD), and the Subject Matter Expert for the Defense Veterans Center for Integrative Pain Management (DVCIPM).He is an affiliate Professor in Science Technology and Health Studies and adjunct Professor in Bioethics and Humanities at the University of Washington (UW).Alex promotes measurement-based care as standard of care in Pain Medicine and is a subject matter expert to the Department of Defense, the Veterans Administration, and is involved in State and Federal legislation to improve pain care.

Disclosure:ARK Theme Developers are not employees of ARK and do not receive compensation from ARK.At Coinbase we’re working hard to build the world’s best bitcoin developer platform.Today, we’re adding a Coinbase Exchange gem to our list of supported client libraries.bitcoin eulaThe Coinbase Wallet and Merchant APIs allow developers to securely store, send and receive bitcoin and to accept bitcoin payments.bitcoin ema chartThe Coinbase Exchange API allows developers to programmatically trade bitcoin with people around the world.esea bitcoin mining scandalCustomers have given us great feedback about their experiences and what features could make our platform more useful.bitcoin federal government

We’ve learned that too often, people with an interesting trading algorithm in mind turn away because the barriers to entry seem too high.Customers should not feel hampered by technical details pertaining to the frameworks and libraries they use.We wanted to make it easy to build software to communicate with our servers.bitcoin friendly banks canadaWhen we build client libraries we attempt to automate anything that requires technical knowledge or seems arbitrary, with as light a footprint as possible.bitcoin fxpA good client library should provide all the functionality of the API, and nothing more.By default, methods should return data in the exact form that the server returns it.We designed the Coinbase Exchange gem with algorithmic trading in mind.It’s an intuitive, stable interface that integrates with EventMachine for placing real-time trades based on information from our Websocket feed.

To demonstrate how easy it is to use our API, we’ll show how to use our gem to write a program that simulates a stop-loss trade.Let’s assume the price of 1 bitcoin is $250.We’re going to buy 10 bitcoin, and close our position immediately if the price drops below $245.The first step is to create API credentials for your account.If you haven’t already, create a new key with Trade and View permissions.Next, let’s initialize our API client and place our initial trade.The gem provides both a synchronous client that’s based on Net::HTTP, as well as an asynchronous client that’s based on EM-HTTP.We’ll use the asynchronous client since we want to react to websocket messages as we receive them.The Websocket feed provides a real-time feed of all activity on the exchange.This is most frequently used for building a real-time orderbook, but can also be used to track the spot rate or changes to your own orders.We’ll need to listen to the Websocket feed to know as soon as the price drops below $245.

Closing our position will require selling 10 bitcoin.We’re going to set the ask price comfortably below $245 to ensure it fills immediately.In this case, we’ll set the ask price to $125.It’s important that we monitor the health of the websocket to ensure that we don’t realize an unintended loss.If the feed stops responding, we’ll need to close our position immediately.We can accomplish this by pinging the websocket periodically.Now you can develop algorithmic trading software using the same interface we offer to professional traders.Please refer to our Github repository and official documentation to learn about what else you can do.As always, we appreciate feedback from the community about what works well and what we can improve.We’re excited to see what you build!Please note: We’re hiring engineers (both in our San Francisco office and remote anywhere in the world).If you’re interested in speaking with us about a role we’ve set up a coding challenge that you can take in about 30–45 minutes.