Government Open Source Policies July 2008 Center for Strategic and International Studies
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(A/V Codecs) REDCODE RAW (.R3D) ARRIRAW
What is a Codec? Codec is a portmanteau of either "Compressor-Decompressor" or "Coder-Decoder," which describes a device or program capable of performing transformations on a data stream or signal. Codecs encode a stream or signal for transmission, storage or encryption and decode it for viewing or editing. Codecs are often used in videoconferencing and streaming media solutions. A video codec converts analog video signals from a video camera into digital signals for transmission. It then converts the digital signals back to analog for display. An audio codec converts analog audio signals from a microphone into digital signals for transmission. It then converts the digital signals back to analog for playing. The raw encoded form of audio and video data is often called essence, to distinguish it from the metadata information that together make up the information content of the stream and any "wrapper" data that is then added to aid access to or improve the robustness of the stream. Most codecs are lossy, in order to get a reasonably small file size. There are lossless codecs as well, but for most purposes the almost imperceptible increase in quality is not worth the considerable increase in data size. The main exception is if the data will undergo more processing in the future, in which case the repeated lossy encoding would damage the eventual quality too much. Many multimedia data streams need to contain both audio and video data, and often some form of metadata that permits synchronization of the audio and video. Each of these three streams may be handled by different programs, processes, or hardware; but for the multimedia data stream to be useful in stored or transmitted form, they must be encapsulated together in a container format. -
Cloud Accelerates Linux Adoption IDC ANALYZE the FUTURE
IDC White Paper | Cloud Accelerates Linux Adoption IDC ANALYZE THE FUTURE Sponsored by: Cloud Accelerates Linux Adoption Oracle Corp. IDC OPINION Authors: Ashish Nadkarni Cloud has become a crucial foundation for digital transformation (DX) initiatives and Gary Chen is shaping the IT strategy of enterprises today. Companies are extending their IT February 2018 infrastructure into the cloud for running business-critical applications, developing new applications, and delivering new cloud-based services. Applications are the lifeblood of modern enterprises. They are the foundation on which businesses maintain their existing revenue streams while examining ways to create new ones. A sound application strategy is a must for frms to be successful in expanding their competitive differentiation in the digital economy. Operating systems (OSs) provide a common foundational layer that enables IT to run current and new generations of applications in traditional IT environments, on its own private cloud, and in public clouds and utilize a variety of computing options such as bare metal, virtualization, and containerization. The increased reliance of IT on the cloud has accelerated the adoption of open source operating systems, Linux being the chief among them. Over the past decade, Linux has evolved to be a versatile platform for current- and new-generation applications — a platform that can run in the cloud or on-premises and can include open source tools and frameworks used in modern application development. Enterprise platform functionality and -
Recommended File Formats for Long-Term Archiving and for Web Dissemination in Phaidra
Recommended file formats for long-term archiving and for web dissemination in Phaidra Edited by Gianluca Drago May 2019 License: https://creativecommons.org/licenses/by-nc-sa/4.0/ Premise This document is intended to provide an overview of the file formats to be used depending on two possible destinations of the digital document: long-term archiving uploading to Phaidra and subsequent web dissemination When the document uploaded to Phaidra is also the only saved file, the two destinations end up coinciding, but in general one will probably want to produce two different files, in two different formats, so as to meet the differences in requirements and use in the final destinations. In the following tables, the recommendations for long-term archiving are distinct from those for dissemination in Phaidra. There are no absolute criteria for choosing the file format. The choice is always dependent on different evaluations that the person who is carrying out the archiving will have to make on a case by case basis and will often result in a compromise between the best achievable quality and the limits imposed by the costs of production, processing and storage of files, as well as, for the preceding, by the opportunity of a conversion to a new format. 1 This choice is particularly significant from the perspective of long-term archiving, for which a quality that respects the authenticity and integrity of the original document and a format that guarantees long-term access to data are desirable. This document should be seen more as an aid to the reasoned choice of the person carrying out the archiving than as a list of guidelines to be followed to the letter. -
Digital Mathematics Library Report of the Technical Standards Working Group
1 Digital Mathematics Library Report of the Technical Standards Working Group Date May 18, 2003 Thierry Bouche, Ulf Rehmann Cochairs: Thierry Bouche Grenoble [email protected] Ulf Rehmann Bielefeld [email protected] Members: Pierre Berard [email protected] Jon Borwein [email protected] Keith Dennis [email protected] Michael Doob [email protected] Contents 1 Scanning Quality 2 2 Archiving Formats 2 3 File Name and URL Conventions 3 4 Delivery Formats 4 5 Download Units 5 6 Server Techniques 5 7 Further recommendations 6 8 Remarks 8 References 8 This document gives technical recommendations to ensure the integration of digitized mathematical documents in a uniform “Digital Mathematics Library” (DML). Since the digitized documents will be produced by various projects, possibly ap- plying different methods and technologies, these recommendations define general technical standards in order to make the DML as a whole easily accessible, usable, maintainable, and sustainable. A digitization project requires several procedures. The most critical tasks are the scanning and archiving processes, which are substantial for the quality and longevity of the data to be preserved. The scanning part requires most of the work, it cannot easily be repeated and should therefore be performed with greatest care. 2 Thierry Bouche, Ulf Rehmann Other tasks, like enhancing the data by OCR layers1, annotations, metadata, and web links, could be either postponed or possibly redone, if later on more advanced technology becomes available. The actual file formats or implementations mentioned here are presented as ex- amples, which, at the time of this writing, can be used in order to achieve the proposed standards. -
Audio File Types for Preservation and Access
AUDIO FILE TYPES FOR PRESERVATION AND ACCESS INTRODUCTION This resource guide identifies and compares audio file formats commonly used for preservation masters and access copies for both born digital and digitized materials. There are a wide range of audio file formats available, each with their own uses, considerations, and best practices. For more information about technical details see the glossary and additional resources linked at the end of this resource guide. For more information about audio files, view related items connected to this resource on the Sustainable Heritage Network in the “Audio Recordings” category. AUDIO FILE FORMATS FOR PRESERVATION MASTERS Lossless files (either uncompressed, or using lossless compression) are best used for preservation masters as they have the highest audio quality and fidelity, however, they produce the largest file sizes. Preservation Masters are generally not edited, or are minimally edited because their purpose is to serve as the most faithful copy of the original recording possible. WAV (Waveform Audio File Format) ● Uncompressed ● Proprietary (IBM), but very widely used ● Accessible on all operating systems and most audio software ● A variant called BWF (Broadcast Wave File Format) allows embedding of additional metadata sustainableheritagenetwork.org | [email protected] Center for Digital Scholarship and Curation | cdsc.libraries.wsu.edu Resource updated 3/14/2018 FLAC (Free Lossless Audio Codec) ● Compressed (lossless) ● Open format ● Accessible on all operating -
Best Practice for Automotive Linux Adoption
Best Practice for Automotive Linux Adoption 1 HISAO MUNAKATA RENESAS SOLUTIONS CORP hisao.munakata.vt(at)renesas.com Best Practice for Automotive Linux Adoption Automotive Linux Summit : 2011‐11‐28 Disclaimer 2 Everything I say here is just my opinion and not the opinion of my employer Renesas. As our experience of Linux and other opensource architecture adoption for the automotive products is quite limited, my understanding here might not be correct or missing something. If you have objection to my opinion, please collect me at any time. I appreciate for your permissiveness.. Best Practice for Automotive Linux Adoption Automotive Linux Summit : 2011‐11‐28 who am I 3 Working for Renesas (semiconductor) Over 15 years “real embedded Linux business field” experience Provide “free Linux starter code (BSP)” for our platform Support Linux newbie's but important customer ( who asks everything about Linux to us) Over 5 years experience working with the community Linux Foundation CEWG Architecture groupe co‐chair We have Linux core technology team inviting some key community developer to put our code into Linux upstream. We have learned how to work with Linux community Best Practice for Automotive Linux Adoption Automotive Linux Summit : 2011‐11‐28 3 topics for today’s talk 4 High quality automotive produces + High quality Linux code = perfect match? Paradigm shift : “Bug free design” to “Fault tolerant design” How can you play with source code ? Best Practice for Automotive Linux Adoption Automotive Linux Summit : 2011‐11‐28 1st topic -
Developing Open Source Scientific Practice
Developing open source scientific practice∗ K. Jarrod Millman Fernando P´erez Division of Biostatistics Henry H. Wheeler Jr. Brain Imaging Center University of California, Berkeley University of California, Berkeley August 31, 2017 Dedicated to the memory of John D. Hunter III, 1968-2012. Contents 1 Introduction2 2 Computational research2 2.1 Computational research life cycle..........................3 2.2 Open source ecosystem................................6 2.3 Communities of practice...............................7 3 Routine practice8 3.1 Version control.....................................8 3.2 Execution automation................................ 10 3.3 Testing......................................... 10 3.4 Readability....................................... 11 3.5 Infrastructure..................................... 13 4 Collaboration 16 4.1 Distributed version control............................. 16 4.2 Code review...................................... 17 4.3 Infrastructure redux................................. 18 5 Communication 19 5.1 Literate programming................................ 19 5.2 Literate computing.................................. 20 5.3 IPython notebook................................... 21 6 Conclusion 25 ∗In Implementing Reproducible Research. Eds. Victoria Stodden, Friedrich Leisch, and Roger D. Peng. pages 149–183. Chapman and Hall/CRC Press, 2014. 1 1 Introduction Computational tools are at the core of modern research. In addition to experiment and the- ory, the notions of simulation and data-intensive discovery -
ASSESSMENT SUMMARY V1.0.0
ASSESSMENT SUMMARY v1.0.0 Ogg1 Xiph.Org Foundation (XIPH)2 1 https://xiph.org/ogg/doc/rfc3533.txt 2 https://xiph.org/ Date: 30/09/2020 1 / 9 Doc.Version: 1.0.0 Change Control Modification Details Version 1.0.0 Initial version Date: 30/09/2020 2 / 9 Doc.Version: 1.0.0 TABLE OF CONTENT 1. INTRODUCTION .................................................................................................................................................. 4 2. ASSESSMENT SUMMARY.................................................................................................................................... 4 2.1. Interoperability Principles ................................................................................................................................ 4 2.2. Interoperability Layers ..................................................................................................................................... 6 3. ASSESSMENT RESULTS ....................................................................................................................................... 8 TABLE OF FIGURES Figure 1. Interoperability principles Results ............................................................................................................ 8 Figure 2. Interoperability layers Results .................................................................................................................. 9 Date: 30/09/2020 3 / 9 Doc.Version: 1.0.0 1. INTRODUCTION The present document is a summary of the assessment of Ogg carried out by -
Why Open Source Software / Free Software (OSS/FS, FLOSS, Or FOSS)? Look at the Numbers!
Translations available: Czech | French | Japanese | Spanish Why Open Source Software / Free Software (OSS/FS, FLOSS, or FOSS)? Look at the Numbers! David A. Wheeler http://www.dwheeler.com/contactme.html Revised as of July 18, 2015 This paper (and its supporting database) provides quantitative data that, in many cases, using open source software / free software (abbreviated as OSS/FS, FLOSS, or FOSS) is a reasonable or even superior approach to using their proprietary competition according to various measures. This paper’s goal is to show that you should consider using OSS/FS when acquiring software. This paper examines popularity, reliability, performance, scalability, security, and total cost of ownership. It also has sections on non-quantitative issues, unnecessary fears, OSS/FS on the desktop, usage reports, governments and OSS/FS, other sites providing related information, and ends with some conclusions. An appendix gives more background information about OSS/FS. You can view this paper at http://www.dwheeler.com/oss_fs_why.html (HTML format). A short presentation (briefing) based on this paper is also available. Palm PDA users may wish to use Plucker to view this longer report. Old archived copies and a list of changes are also available. 1. Introduction Open Source Software / Free Software (aka OSS/FS), also described as Free/Libre and Open Source Software (FLOSS), has risen to great prominence. Briefly, FLOSS programs are programs whose licenses give users the freedom to run the program for any purpose, to study and modify the program, and to redistribute copies of either the original or modified program (without having to pay royalties to previous developers). -
Yet Another Programming Exercises Interoperability Language
Yet Another Programming Exercises Interoperability Language José Carlos Paiva CRACS – INESC, LA, Porto, Portugal DCC – FCUP, Porto, Portugal [email protected] Ricardo Queirós CRACS – INESC, LA, Porto, Portugal uniMAD – ESMAD, Polytechnic of Porto, Portugal http://www.ricardoqueiros.com [email protected] José Paulo Leal CRACS – INESC, LA, Porto, Portugal DCC – FCUP, Porto, Portugal https://www.dcc.fc.up.pt/~zp [email protected] Jakub Swacha University of Szczecin, Poland [email protected] Abstract This paper introduces Yet Another Programming Exercises Interoperability Language (YAPExIL), a JSON format that aims to: (1) support several kinds of programming exercises behind traditional blank sheet activities; (2) capitalize on expressiveness and interoperability to constitute a strong candidate to standard open programming exercises format. To this end, it builds upon an existing open format named PExIL, by mitigating its weaknesses and extending its support for a handful of exercise types. YAPExIL is published as an open format, independent from any commercial vendor, and supported with dedicated open-source software. 2012 ACM Subject Classification Applied computing → Computer-managed instruction; Applied computing → Interactive learning environments; Applied computing → E-learning Keywords and phrases programming exercises format, interoperability, automated assessment, programming learning Digital Object Identifier 10.4230/OASIcs.SLATE.2020.14 Category Short Paper Funding This paper is based on the work done within the Framework for Gamified Programming Education project supported by the European Union’s Erasmus Plus programme (agreement no. 2018-1-PL01-KA203-050803). 1 Introduction Learning programming relies on practicing. Practicing in this domain boils down to solve exercises. -
Research Openxml, ODF &
Research about OpenXML, ODF & PDF February 2007 Ovitas AS, Norway www.ovitas.no Research – OpenXML, ODF & PDF Table of Contents 1 SCOPE AND SUMMARY ...................................................................................... 4 2 STANDARD ..................................................................................................... 5 2.1 ODF .............................................................................................................................................................5 2.2 OPEN XML ....................................................................................................................................................5 2.3 PDF ..............................................................................................................................................................5 3 ORGANIZATION ................................................................................................ 6 3.1 ADMINISTRATION ..........................................................................................................................................6 3.1.1 OASIS (ODF) .....................................................................................................................................6 3.1.2 Ecma (OpenXML) ..............................................................................................................................6 3.2 MEMBERSHIP ................................................................................................................................................6 -
Ubuntu Touch Download Terminal Android Ubuntu Wiki
ubuntu touch download terminal android Ubuntu Wiki. Installing Ubuntu Touch onto a supported mobile device is fairly easy, especially if you have already configured your machine for Android app development. We describe two methods for doing so -- the manual method and the automated method. Each method has pros and cons. Installing manually, with no setup. Minimal setup (assuming you are already familiar with Android app development on OSX) Can be tedious if you want to install the OS image multiple times, or if you will install different versions in the future. Obtain a mobile device supported by Ubuntu Touch Install Android Studio to obtain tools like adb and fastboot Download the proper Ubuntu Touch images for your device Manually flashing your device with adb and fastboot. Automated installation, with one-time setup. Will save time over the long run if you install the OS image multiple times. Longer one-time setup that involves installing a number of software dependencies. Obtain a mobile device supported by Ubuntu Touch Install homebrew to get access to bzr and xz Install Android Studio to obtain tools like adb and fastboot Install the go language runtime and udbflash Flash your device with Ubuntu Touch. homebrew install bzr, xz. bzr - version control system, pre-dates git, and used by Ubuntu. Read the homebrew documents for the full story, but the quick summary is to issue the following at a Terminal: After install bzr, you will get a message about modifying your python path. You should do so by modifying your. You should also double-check to ensure that your shell is reading.