Blockchain: A Shared Noun



  • Guest post: Aaron Symanski, CTO, Change Healthcare

    In many of the discussions that I have had regarding blockchain, business models are a frequent topic. Why use a new technology like blockchain instead of an existing, well understood, proven, cost effective technology? What makes blockchain radically different?

    To answer, let’s start with a simple history of the evolution of communication, the evolution of how one person shared a concept with another person. What was visual (point at it), became verbal (speak and hear), became written (write and read), and then became an electronic transmission. Telegraph became radio became television. Each approach was essentially the same: describe something in enough detail such that the listener could create the same picture in their mind or on their device.

    In these approaches, the sender strives for enough detail that the listener can create an identical view. Complete accuracy is difficult. Differences are basically guaranteed, especially if changes occur to the picture by either party. Reconciliations attempt to repair the differences. Doubts gather whether the sender and receiver are staying on the same page. In some cases, the cost of reconciliation is so high that it is simply ignored and differences accumulate.

    Some mitigations have arisen. The simplistic sending of a flat file, as a description of the object, has moved to the use of APIs. Systems now agree to the verbs used with an object and to use the verbs to communicate actions about the object. These verbs make up an API. With such, two or more systems can communicate about an object without actually exchanging the object. Color the car red, Credit the account $500.

    Blockchain technology adds a new approach to our toolkits. Blockchain technology enables the sender and receiver to always interact with the same object, the same noun. The local copy of the object is complete and synchronized across each participant of the blockchain network. No explicit interpretation or reconciliation needed. We now have a new tool, a new ability to share the noun, a single noun**.** The historic approaches of trying to describe, create, and work through verbs are not limiters any more.

    By sharing the noun, blockchains create opportunities for new paradigms where all participants see the same object and every change to the object. The verbs do not need to be agreed upon. This freedom to interact with the noun, a shared object, without agreement as to how, is a very different and new approach.

    How do we think about existing business models in a model of sharing the noun? Submitting a medical claim becomes simply placing it on the blockchain. After that, all participants can edit, approve, pay, reject, bundle, and take any action they want on the claim. Imagine six companies, sharing a blockchain. Each has connected their systems to the blockchain to take action as changes are seen on the chain, and to submit their own changes to the chain. Everyone on the network can work simultaneously. As every participant sees every change on the claim, taking action on edits becomes easy and automatic.

    This model of sharing a noun is unlike any business process today. No longer restricted by previous modes of communication, we can each see the same noun and operate on it together. We have an opportunity to move from linear, assembly-line workflows to constant and simultaneous interaction. This is an exciting opportunity and to explore it, we must begin using blockchains in our production processes. We should not seek the “killer app.” Instead, we should create a thousand new opportunities for new interactions, value creation, and niches in our ecosystems. As these opportunities succeed and some fail, we will learn. Let’s begin exploring the uncharted areas of our maps.

    This article originally appeared at Hyperledger.

    The post Blockchain: A Shared Noun appeared first on The Linux Foundation.

    https://www.linuxfoundation.org/blog/blockchain-shared-noun/





Tmux Commands

screen and tmux

A comparison of the features (or more-so just a table of notes for accessing some of those features) for GNU screen and BSD-licensed tmux.

The formatting here is simple enough to understand (I would hope). ^ means ctrl+, so ^x is ctrl+x. M- means meta (generally left-alt or escape)+, so M-x is left-alt+x

It should be noted that this is no where near a full feature-set of either group. This - being a cheat-sheet - is just to point out the most very basic features to get you on the road.

Trust the developers and manpage writers more than me. This document is originally from 2009 when tmux was still new - since then both of these programs have had many updates and features added (not all of which have been dutifully noted here).

Action tmux screen
start a new session tmux OR
tmux new OR
tmux new-session
screen
re-attach a detached session tmux attach OR
tmux attach-session
screen-r
re-attach an attached session (detaching it from elsewhere) tmux attach -d OR
tmux attach-session -d
screen -dr
re-attach an attached session (keeping it attached elsewhere) tmux attach OR
tmux attach-session
screen -x
detach from currently attached session ^b d OR
^b :detach
^a ^d OR
^a :detach
rename-window to newname ^b , <newname> OR
^b :rename-window <newn>
^a A <newname>
list windows ^b w ^a w
list windows in chooseable menu ^a "
go to window # ^b # ^a #
go to last-active window ^b l ^a ^a
go to next window ^b n ^a n
go to previous window ^b p ^a p
see keybindings ^b ? ^a ?
list sessions ^b s OR
tmux ls OR
tmux list-sessions
screen -ls
toggle visual bell ^a ^g
create another window ^b c ^a c
exit current shell/window ^d ^d
split window/pane horizontally ^b " ^a S
split window/pane vertically ^b % ^a |
switch to other pane ^b o ^a <tab>
kill the current pane ^b x OR (logout/^D)
collapse the current pane/split (but leave processes running) ^a X
cycle location of panes ^b ^o
swap current pane with previous ^b {
swap current pane with next ^b }
show time ^b t
show numeric values of panes ^b q
toggle zoom-state of current pane (maximize/return current pane) ^b z
break the current pane out of its window (to form new window) ^b !
re-arrange current panels within same window (different layouts) ^b [space]
Kill the current window (and all panes within) ^b killw [target-window]
  • Open Source Summit

    Join us in Edinburgh! Submit a proposal to speak by July 1 for Open Source Summit & ELC + OpenIoT Summit Europe.

    Submit a proposal to speak at Open Source Summit Europe & ELC + OpenIoT Summit Europe, taking place October 22-24, 2018, in Edinburgh, UK, and share your knowledge and expertise with 2,000+ open source technologists and community leaders. Proposals are being accepted through 11:59pm PDT, Sunday, July 1.

    This year’s tracks and content will cover the following areas at Open Source Summit Europe:

    Cloud Native Apps/Serverless/Microservices Infrastructure & Automation (Cloud/Cloud Native/DevOps) Linux Systems Artificial Intelligence & Data Analytics Emerging Technologies & Wildcard (Networking, Edge, IoT, Hardware, Blockchain) Community, Compliance, Governance, Culture, Open Source Program Management (Open Collaboration Conference track) Diversity & Inclusion (Diversity Empowerment Summit) Innovation at Apache/Apache Projects TODO / Open Source Program Management

    View the full list of suggested topics for Open Source Summit Europe.

    Suggested Embedded Linux Conference (ELC) Topics:

    Audio, Video, Streaming Media and Graphics Security System Size, Boot Speed Real-Time Linux – Performance, Tuning and Mainlining SDKs for Embedded Products Flash Memory Devices and Filesystems Build Systems, Embedded Distributions and Development Tools Linux in Devices such as Mobile Phones, DVRs, TVs, Cameras, etc Use of Linux in Automotive Drones and Robots Linux in the Internet of Things Practical Experiences and War Stories Standards Public Infrastructure Industrial Automation

    This year’s tracks and content will cover the following areas at ELC:

    Suggested OpenIoT Summit Topics:

    Real-Time OS (Zephyr, RIOT, MyNewt, FreeRTOS, NuttX, mbed and Others) Outside World Meets IoT (Sensor Interaction, Low Footprint, Connected Sensors, EMF/RFI Impact) Bootloaders, Firmware & Updates Containers Distributed Edge Application Technologies On-device Analytics Blockchain for Constrained Devices Device Management Power Management Configuration Management Developing for Security Safety Considerations Certifications – Lessons Learned Taking Devices to Product

    View the full list of suggested topics for ELC + OpenIoT Summit Europe.

    SUBMIT FOR OPEN SOURCE SUMMIT EUROPE »SUBMIT FOR ELC + OPENIOT SUMMIT EUROPE »

    Sign up to receive updates on Open Source Summit Europe and ELC + OpenIoT Summit Europe:

    Register & Save

    Not submitting, but plan to attend? Register before August 18 and save $300 with early bird pricing. One registration gets you access to both Open Source Summit Europe & ELC + OpenIoT Summit Europe.

    Interested in Sponsoring?

    Showcase your thought leadership among a vibrant open source community and connect with top influencers driving today’s technology purchasing decisions. Learn how to become a sponsor of Open Source Summit Europe or ELC + OpenIoT Summit Europe.

    The post Last Chance to Speak at Open Source Summit and ELC + OpenIoT Summit Europe – Submit by July 1 appeared first on The Linux Foundation.

    https://www.linuxfoundation.org/blog/last-chance-to-speak-at-open-source-summit-and-elc-openiot-summit-europe-submit-by-july-1/

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  • Open Source Guides

    The Open Source Guides for the Enterprise are now available in Chinese.

    The popular Open Source Guides for the Enterprise, developed by The Linux Foundation in collaboration with the TODO Group, are now available in Chinese. This set of guides provides industry-proven best practices to help organizations successfully leverage open source.

    “Making these resources available to Chinese audiences in their native language will encourage even greater adoption of and participation with open source projects,” said Chris Aniszczyk, CTO of Cloud Native Computing Foundation and co-founder of the TODO Group. The guides span various stages of the open source project lifecycle, from initial planning and formation to winding down a project.

    The 10 guides now available in Mandarin include topics such as:

    Creating an Open Source Program by Chris Aniszczyk, Cloud Native Computing Foundation; Jeff McAffer, Microsoft; Will Norris, Google; and Andrew Spyker, Netflix Using Open Source Code by Ibrahim Haddad, Samsung Research America Participating in Open Source Communities by Stormy Peters, Red Hat; and Nithya Ruff, Comcast Recruiting Open Source Developers by Guy Martin, Autodesk; Jeff Osier-Mixon, Intel Corporation; Nithya Ruff; and Gil Yehuda, Oath Measuring Your Open Source Program’s Success by Christine Abernathy, Facebook; Chris Aniszczyk; Joe Beda, Heptio; Sarah Novotny, Google; and Gil Yehuda

    The translated guides were launched at the LinuxCon + ContainerCon + CloudOpen China conference in Beijing, where The Linux Foundation also welcomed Chinese Internet giant Tencent as a Platinum Member.

    The post Open Source Guides for the Enterprise Now Available in Chinese appeared first on The Linux Foundation.

    https://www.linuxfoundation.org/blog/open-source-guides-for-the-enterprise-now-available-in-chinese/

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