Open Source Compliance in the Enterprise
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Latent GOLD, Polca, and MCLUST
JOBNAME: tast 63#1 2009 PAGE: 1 OUTPUT: Thursday January 15 07:45:17 2009 asa/tast/164303/SR3 Review of Three Latent Class Cluster Analysis Packages: Latent GOLD, poLCA, and MCLUST Dominique HAUGHTON, Pascal LEGRAND, and Sam WOOLFORD McCutcheon (2002). Because LCA is based upon a statistical model, maximum likelihood estimates can be used to classify This article reviews three software packages that can be used cases based upon what is referred to as their posterior proba- to perform latent class cluster analysis, namely, Latent GOLDÒ, bility of class membership. In addition, various diagnostics are MCLUST, and poLCA. Latent GOLDÒ is a product of Statistical available to assist in the determination of the optimal number Innovations whereas MCLUST and poLCA are packages of clusters. written in R and are available through the web site http:// LCA has been used in a broad range of contexts including www.r-project.org. We use a single dataset and apply each sociology, psychology, economics, and marketing. LCA is software package to develop a latent class cluster analysis for presented as a segmentation tool for marketing research and the data. This allows us to compare the features and the tactical brand decision in Finkbeiner and Waters (2008). Other resulting clusters from each software package. Each software applications in market segmentation are given in Cooil, package has its strengths and weaknesses and we compare the Keiningham, Askoy, and Hsu (2007), Malhotra, Person, and software from the perspectives of usability, cost, data charac- Bardi Kleiser (1999), Bodapati (2008), and Pancras and Sudhir teristics, and performance. -
Report on the 2020 FOSS Contributor Survey
Report on the 2020 FOSS Contributor Survey The Linux Foundation & The Laboratory for Innovation Science at Harvard Frank Nagle Harvard Business School David A. Wheeler The Linux Foundation Hila Lifshitz-Assaf New York University Haylee Ham Jennifer L. Hoffman Laboratory for Innovation Science at Harvard Acknowledgments This report and the research behind it would not have been possible without the leadership of the Core Infrastructure Initiative’s Advisory Committee, composed of Josh Corman, Steve Lipner, Audris Mockus, Henning Piezunka, and Sam Ransbotham. Frank Nagle would also like to thank his fellow co-directors of the Core Infrastructure Initiative, Jim Zemlin at the Linux Foundation and Karim Lakhani at the Laboratory for Innovation Science at Harvard, for their counsel and direction throughout this project. Gratitude and thanks to Michael Dolan and Kate Stewart at the Linux Foundation for their ongoing commitment to this undertaking. Thank you to James Dana for laying the initial groundwork for this survey. Finally — and perhaps, most importantly — thank you to all the individuals who contribute to FOSS projects. Without their tireless efforts, our core digital infrastructure and the feats enabled by it would not be sustainable. REVISED: This report has been updated since its original release on 8 December 2020. This second version, released on 10 December 2020, corrects errors found in the original text and graphics. Contents Executive Summary 4 Introduction 7 Methodology 9 Overview of Findings 10 Demographics 10 Figure 1: Gender -
Kernel Validation with Kselftest Shuah Khan, Kernel Maintainer and Fellow, the Linux Foundation
Kernel Validation With Kselftest Shuah Khan, Kernel Maintainer and Fellow, The Linux Foundation • Why do we test? • Kinds of testing/tests ... – Unit, developer, regression, integration • Linux kernel testing philosophy – Developer and community driven testing – Reliance on community and users • Linux kernel release cycle – Time based - not feature based – Continuous and parallel development/testing model • Linux kernel testing and validation – Writing tests • Kernel test frameworks - Kselftest & KUnit – Developer testing • Kselftest, KUnit and others. – Regression testing • Kselftest, KUnit and others. • Linux kernel testing and validation – Continuous Integration testing • Static analysis tools (sparse, smatch, coccicheck etc.) • Dynamic analysis tools (fuzzers, syzbot etc.) • Where does this all happen? – Developer test systems – Continuous Integration Rings • Kernel CI Dashboard — Home • 0-Day - Boot and Performance issues • 0-Day - Build issues • Linaro QA • Buildbot • Hulk Robot • What is tested? – Kernel repositories: • linux mainline • linux-next • developer git repositories – Active kernel releases • Basic testing – Boot and usage test – Run basic sanity tests • Basic sanity tests – Does networking (wifi/wired) work correctly? – Does ssh work? – rsync a large file(s) from another system – Download files: wget, ftp, git clone etc. – Play audio/video • Examine kernel logs – Look for new critical and error messages – Check for new warning messages – Check for panic traces • Kernel selftest (Kselftest) – Regression test suite • Kernel -
Titans and Trolls of the Open Source Arena
Titans and Trolls Enter the Open-Source Arena * by DEBRA BRUBAKER BURNS I. Introduction .................................................................................... 34 II. Legal Theories for Open Source Software License Enforcement ................................................................................... 38 A. OSS Licensing .......................................................................... 38 B. Legal Theories and Remedies for OSS Claims .................... 40 1. Legal Protections for OSS under Copyright and Contract Law ..................................................................... 40 Stronger Protections for OSS License under Copyright Law ................................................................... 40 2. Copyright-Ownership Challenges in OSS ....................... 42 3. Potential Legal Minefields for OSS under Patent Law ...................................................................................... 45 4. Added Legal Protection for OSS under Trademark Law ...................................................................................... 46 5. ITC 337 Action as Uncommon Legal Protection for OSS ..................................................................................... 49 III. Enforcement Within the OSS Community .................................. 49 A. Software Freedom Law Center Enforces OSS Licenses .... 50 B. Federal Circuit Finds OSS License Enforceable Under Copyright Law ......................................................................... 53 C. Commercial OSS -
Please Don't Go
Please Don’t Go - Increasing Women’s Participation in Open Source Software Bianca Trinkenreich Northern of Arizona University Flagstaff, AZ, USA [email protected] Abstract—Women represent less than 24% of the software the development of the community with norms and values development industry and suffer from various types of prejudice consistent with their own vision [12], focusing on the first and biases. In Open Source Software projects, despite a variety social experiences through programs such as mentorships [13], of efforts to increase diversity and multi-gendered participation, women are even more underrepresented (less than 10%). My and fixing the gender-bias issues in non-inclusive tools and research focuses on answering the question: How can OSS infrastructure [14]. Some strategies that are discouraged by communities increase women’s participation in OSS projects? the literature include setting quotas for women. Just increasing I will identify the different OSS career pathways, and develop the proportion of women can lead to questioning stereotypes a holistic view of women’s motivations to join or leave OSS, and decisions to simply re-classify types of work that are cur- along with their definitions of success. Based on this empirical investigation, I will work together with the Linux Foundation rently packaged in masculine-feminine stereotyped specialties. to design attraction and retention strategies focused on women. Another discouraged strategy is related to coding schools that Before and after implementing the strategies, I will conduct train women in specialties where they are already represented. empirical studies to evaluate the state of the practice and These schools might perpetuate the disadvantage of women understand the implications of the strategies. -
R Pass by Reference
R Pass By Reference Unlidded Sherlock verjuices or imbibe some pancake ingenuously, however littery Winifield denitrifies detestably or jellified. Prasun rhubarbs simperingly while overnice Stanleigh witch thru or rent immemorially. Acescent and unprejudiced Tanney stints her distillations damming or jitterbugging luxuriously. Doing so any task in the argument and reference by value of the use it and data have no problems become hard to have been deactivated Thanks for sharing it. Modernization can operate much faster, simpler, and safer when supported with analysis tools and even code transformation tools. But by appending an element, they created a new hardware which, of course, did you update the reference. Joe, this is indeed excellent tutorial in your Java kitty. However, this section focuses on wade is afraid to template implementation. What are someone different types of Classes in Java? To insure goods are released, we need to begin able to decrement their reference counts once we no longer made them. You should contact the package authors for that. Limit the loop variable visibility to the except of cord loop. Protected member function can be simply fine. If she is a default constructor, compare those assignments to the initializations in the default constructor. Left clear Right sides of an assignment statement. What began the basic Structure of a Java Program? This can experience nasty bugs that are extremely hard to debug. Warn the two consecutive parameters share is same type. How can Convert Char To stuff In Java? Please lift the information below before signing in. NOTHING but pass by reference in Java. -
Safeguarding the Future of Linux Through Standards
Safeguarding the Future of Linux Through Standards “ Through the defi nition and testing of operating system interfaces, the LSB creates a stable platform that benefi ts Safeguarding Key Facts the Future of bo th developers and users.” - Linus Torvalds Linux Through Standards • The FSG is a non-profi t organization devoted to the ongoing success of Linux The Free Standards Group is an independent nonprofi t organization dedicated to accelerating the use and acceptance of free and open source • Growing membership includes all leading Linux vendors software by developing and promoting standards. Supported by leaders and many infl uential non-profi ts in the IT industry as well as the open source development community, the in the Linux community Free Standards Group fulfi lls a critical need to have common behavioral • Workgroups cover key specifi cations, tools and ABIs across Linux platforms. The Linux Standard Base Linux standards issues such as a binary standard and offers an answer to the most pressing issue facing Linux today: fragmentation. internationalization • Board members include an A well supported standard for Linux is the neccesary component to Linux’s assortment of Linux experts continued success. Without a commonly adopted standard, Linux will fragment, and senior representatives of the Linux community thus proving costly for ISVs to port their applications to the operating system and making it diffi cult for end users and Linux vendors alike. By adopting the • Headquartered in San Francisco Linux Standard Base, the Linux community provides this crucial portability so that applications can be used on more than one distribution of Linux with little or no change. -
Compiling C++ Files & Declarations and Definitions
Compiling C++ files Compiling C++ files 143 Compiling C++ files Hello World 2.0 Hello World 2.0 In C++ the code is usually separated into header files (.h/.hpp) and implementation files (.cpp/.cc): sayhello.hpp #include <string> void sayhello(const std::string& name); sayhello.cpp #include "sayhello.hpp" #include <iostream> void sayhello(const std::string& name){ std::cout << "Hello " << name << '!' << std::endl; } Other code that wants to use this function only has to include sayhello.hpp. 144 Compiling C++ files Compiler Compiler Reminder: Internally, the compiler is divided into Preprocessor, Compiler, and Linker. Preprocessor: • Takes an input file of (almost) any programming language • Handles all preprocessor directives (i.e., all lines starting with #) and macros • Outputs the file without any preprocessor directives or macros Compiler: • Takes a preprocessed C++ (or C) file, called translation unit • Generates and optimizes the machine code • Outputs an object file Linker: • Takes multiple object files • Can also take references to other libraries • Finds the address of all symbols (e.g., functions, global variables) • Outputs an executable file or a shared library 145 Compiling C++ files Compiler Preprocessor Most common preprocessor directives: • #include: Copies (!) the contents of a file into the current file // include system file iostream: #include <iostream> // include regular file myfile.hpp: #include "myfile.hpp" • #define: Defines a macro #define FOO // defines the macro FOO with no content #define BAR 1 // defines the macro BAR as 1 • #ifdef/#ifndef/#else/#endif: Removes all code up to the next #else/#endif if a macro is set (#ifdef) or not set (#ifndef) #ifdef FOO .. -
Khem Raj [email protected] Embedded Linux Conference 2014, San Jose, CA
Khem Raj [email protected] Embedded Linux Conference 2014, San Jose, CA } Introduction } What is GCC } General Optimizations } GCC specific Optimizations } Embedded Processor specific Optimizations } What is GCC – Gnu Compiler Collection } Cross compiling } Toolchain } Cross compiling } Executes on build machine but generated code runs on different target machine } E.g. compiler runs on x86 but generates code for ARM } Building Cross compilers } Crosstool-NG } OpenEmbedded/Yocto Project } Buildroot } OpenWRT } More …. } On } controls compilation time } Compiler memory usage } Execution speed and size/space } O0 } No optimizations } O1 or O } General optimizations no speed/size trade-offs } O2 } More aggressive than O1 } Os } Optimization to reduce code size } O3 } May increase code size in favor of speed Property General Size Debug Speed/ Opt level info Fast O 1 No No No O1..O255 1..255 No No No Os 2 Yes No No Ofast 3 No No Yes Og 1 No Yes No } GCC inline assembly syntax asm ( assembly template : output operands : input operands : A list of clobbered registers ); } Used when special instruction that gcc backends do not generate can do a better job } E.g. bsrl instruction on x86 to compute MSB } C equivalent long i; for (i = (number >> 1), msb_pos = 0; i != 0; ++msb_pos) i >>= 1; } Attributes aiding optimizations } Constant Detection } int __builtin_constant_p( exp ) } Hints for Branch Prediction } __builtin_expect #define likely(x) __builtin_expect(!!(x), 1) #define unlikely(x) __builtin_expect(!!(x), 0) } Prefetching } __builtin_prefetch -
Linux Foundation Training & Certification
Linux Foundation Training & Certification April 2020 Agenda 1. The Linux Foundation (TLF or The LF) 2. Demand for Talent 3. Training and Certification 4. Why Certify with LFCS? Close with Q&A Intro to the Linux Foundation Linux Foundation History ˃ The Linux Foundation was started in 2000 under the Open Source Development Labs (OSDL) and became the organization it is today when OSDL merged with the Free Standards Group (FSG) in 2007. ˃ The Linux Foundation is home to the largest open source projects in the world and sponsors the work of Linux creator Linus Torvalds. ˃ The Linux Foundation is supported by leading technology firms and developers from around the world. ˃ The Linux Foundation provides infrastructure, legal management, events, training and certification, for open source projects in order grow and sustain them. 4 The Linux Foundation is creating the greatest shared technology investment in history by enabling open source collaboration across companies, developers, and users. We are the organization of choice to build ecosystems that accelerate open technology development and commercial adoption. Neutral home for the world's most important projects We host over 200 of the most critical open source projects accelerating open technology and commercial adoption. Our projects harness the power of open source development to fuel innovation at unmatched speed and scale. www.linuxfoundation.org/projects/ Linux has become the most important software in the world 99% 82% 2nd 90% 90% 62% #1 Supercomputer Smartphone To Windows Mainframe -
Android – the First Truly Open and Complete Platform for Mobile Devices
Android – the first truly open and complete platform for mobile devices KNOW-HOW # 50 Android is a new open-source platform for mobile phones. With its solid Linux foundation, a very business-friendly open-source license and an easy-to-use Java programming model, it provides a perfect basis for mobile applications – and beyond. As part of the Open Handset Alliance that guides Android‘s evolution, Noser Engineering AG contributed functionality to the core platform. «Android is the first truly open and comprehensive platform for mobile devices. It includes an operating system, user-interface and applications – all of the software to run a mobile phone, but without the proprietary obstacles that have hindered mobile innovation. We have developed Android in cooperation with the Open Handset Alliance, which consists of more than 30 technology and mobile leaders including Motorola, Qualcomm, HTC and T-Mobile. Through deep partnerships with carriers, device manufacturers, developers, and others, we hope to enable an open ecosystem for the mobile world by creating a standard, open mobile software platform. We think the result will ultimately be a better and faster pace for innovation that will give mobile customers unforeseen applications and capabilities.» Andy Rubin, Director of Mobile Platforms at Google, official Google Blog entry 11/5/2007 we know how The project As part of the Open Handset Alliance and on behalf of Google, Noser Engineering AG contributed the larger part of the so-called «Android core libraries». These are basically a set of libraries that provide most of the functionality typically found in desktop implementations of the Java programming language, but adapted to and optimized for a mobile device. -
Android (Operating System) 10.1 Introduction: Android Is a Mobile
Page 1 of 9 Android (operating system) 10.1 Introduction: Android is a mobile operating system (OS) based on the Linux kernel and currently developed by Google. With a user interface based on direct manipulation, Android is designed primarily for touchscreen mobile devices such as smartphones and tablet computers, with specialized user interfaces for televisions (Android TV), cars (Android Auto), and wrist watches (Android Wear). The OS uses touch inputs that loosely correspond to real-world actions, like swiping, tapping, pinching, and reverse pinching to manipulate on-screen objects, and a virtual keyboard. Despite being primarily designed for touchscreen input, it also has been used in game consoles, digital cameras, and other electronics. Android is the most popular mobile OS. As of 2013, Android devices sell more than Windows, iOS, and Mac OS devices combined,[14][15][16][17] with sales in 2012, 2013 and 2014[18] close to the installed base of all PCs.[19] As of July 2013 the Google Play store has had over 1 million Android apps published, and over 50 billion apps downloaded.[20] A developer survey conducted in April–May 2013 found that 71% of mobile developers develop for Android.[21] At Google I/O 2014, the company revealed that there were over 1 billion active monthly Android users (that have been active for 30 days), up from 538 million in June 2013.[22] Android's source code is released by Google under open source licenses, although most Android devices ultimately ship with a combination of open source and proprietary software.[3]