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Machine learning: the power and promise of computers that learn by example MACHINE LEARNING: THE POWER AND PROMISE OF COMPUTERS THAT LEARN BY EXAMPLE 1 Machine learning: the power and promise of computers that learn by example Issued: April 2017 DES4702 ISBN: 978-1-78252-259-1 The text of this work is licensed under the terms of the Creative Commons Attribution License which permits unrestricted use, provided the original author and source are credited. The license is available at: creativecommons.org/licenses/by/4.0 Images are not covered by this license. This report can be viewed online at royalsociety.org/machine-learning Cover image © shulz. 2 MACHINE LEARNING: THE POWER AND PROMISE OF COMPUTERS THAT LEARN BY EXAMPLE Contents Executive summary 5 Recommendations 8 Chapter one – Machine learning 15 1.1 Systems that learn from data 16 1.2 The Royal Society’s machine learning project 18 1.3 What is machine learning? 19 1.4 Machine learning in daily life 21 1.5 Machine learning, statistics, data science, robotics, and AI 24 1.6 Origins and evolution of machine learning 25 1.7 Canonical problems in machine learning 29 Chapter two – Emerging applications of machine learning 33 2.1 Potential near-term applications in the public and private sectors 34 2.2 Machine learning in research 41 2.3 Increasing the UK’s absorptive capacity for machine learning 45 Chapter three – Extracting value from data 47 3.1 Machine learning helps extract value from ‘big data’ 48 3.2 Creating a data environment to support machine learning 49 3.3 Extending the lifecycle of open data requires open standards 55 3.4 Technical alternatives to open data: simulations and synthetic data 57 Chapter four – Creating value from machine learning 61 4.1 Human capital, and building skills at every level 62 4.2 Machine learning and the Industrial Strategy 74 MACHINE LEARNING: THE POWER AND PROMISE OF COMPUTERS THAT LEARN BY EXAMPLE 3 Chapter five – Machine learning in society 83 5.1 Machine learning and the public 84 5.2 Social issues associated with machine learning applications 90 5.3 The implications of machine learning for governance of data use 98 5.4 Machine learning and the future of work 100 Chapter six – A new wave of machine learning research 109 6.1 Machine learning in society: key scientific and technical challenges 110 6.2 Interpretability and transparency 110 6.3 Verification and robustness 112 6.4 Privacy and sensitive data 113 6.5 Dealing with real-world data: fairness and the full analytics pipeline 114 6.6 Causality 115 6.7 Human-machine interaction 115 6.8 Security and control 116 6.9 Supporting a new wave of machine learning research 117 Annex / Glossary / Appendices 119 Canonical problems in machine learning 120 Glossary 122 Appendix 124 4 MACHINE LEARNING: THE POWER AND PROMISE OF COMPUTERS THAT LEARN BY EXAMPLE EXECUTIVE SUMMARY Executive summary Machine learning is a branch of artificial significant. In healthcare, machine learning is intelligence that allows computer systems creating systems that can help doctors give to learn directly from examples, data, and more accurate or effective diagnoses for experience. Through enabling computers to certain conditions. In transport, it is supporting perform specific tasks intelligently, machine the development of autonomous vehicles, and learning systems can carry out complex helping to make existing transport networks processes by learning from data, rather more efficient. For public services it has the than following pre-programmed rules. potential to target support more effectively to those in need, or to tailor services to users. Recent years have seen exciting advances And in science, machine learning is helping in machine learning, which have raised its to make sense of the vast amount of data capabilities across a suite of applications. available to researchers today, offering new Increasing data availability has allowed insights into biology, physics, medicine, the machine learning systems to be trained on social sciences, and more. a large pool of examples, while increasing computer processing power has supported the The UK has a strong history of leadership analytical capabilities of these systems. Within in machine learning. From early thinkers the field itself there have also been algorithmic in the field, through to recent commercial advances, which have given machine learning successes, the UK has supported excellence greater power. As a result of these advances, in research, which has contributed to the systems which only a few years ago performed recent advances in machine learning that at noticeably below-human levels can now promise such potential. These strengths in outperform humans at some specific tasks. research and development mean that the UK is well placed to take a leading role in Many people now interact with systems based the future development of machine learning. on machine learning every day, for example Ensuring the best possible environment for in image recognition systems, such as those the safe and rapid deployment of machine used on social media; voice recognition learning will be essential for enhancing systems, used by virtual personal assistants; the UK’s economic growth, wellbeing, and and recommender systems, such as those security, and for unlocking the value of ‘big used by online retailers. As the field develops data’. Action in key areas – shaping the data further, machine learning shows promise landscape, building skills, supporting business, of supporting potentially transformative and advancing research – can help create advances in a range of areas, and the social this environment. and economic opportunities which follow are MACHINE LEARNING: THE POWER AND PROMISE OF COMPUTERS THAT LEARN BY EXAMPLE 5 EXECUTIVE SUMMARY The recent success of machine learning owes There is already high demand for people no small part to the explosion of data that is with advanced skills, with specialists in the available in some areas, such as image or field being highly sought after, and additional speech recognition. This data has provided resources to increase this talent pool are a vast number of examples, which machine critically needed. ‘No regrets’ steps in building learning systems can use to improve their digital literacy and informed users will also performance. In turn, machine learning help prepare the UK for possible changes in can help address the social and economic the employment landscape, as the fields of benefits expected from so-called ‘big data’, machine learning, artificial intelligence, and by extracting valuable information through robotics develop. advanced data analytics. Supporting the development of this function for machine There is a vast range of potential benefits learning requires an amenable data from further uptake of machine learning across environment, based on open standards industry sectors, and the economic effects and frameworks or behaviours to ensure of this technology could play a central role in data availability across sectors. helping to address the UK’s productivity gap. Businesses of all sizes across sectors need As machine learning systems become more to have access to appropriate support that ubiquitous, or significant in certain fields, three helps them to understand the value of data skills needs follow. Firstly, as daily interactions and machine learning to their operations. with machine learning become the norm for To meet the demand for machine learning most people, a basic understanding of the across industry sectors, the UK will need to use of data and these systems will become an support an active machine learning sector, important tool required by people of all ages which capitalises on the UK’s strength in this and backgrounds. Introducing key concepts area, and its relative international competitive in machine learning at school can help ensure advantages. The UK’s start-up environment this. Secondly, to ensure that a range of has nurtured a number of high-profile success sectors and professions have the absorptive stories in machine learning, and strategic capacity to use machine learning in ways that consideration should be given to how to are useful for them, new mechanisms are maximise the value of entrepreneurial needed to create a pool of informed users or activity in this space. practitioners. Thirdly, further support is needed to build advanced skills in machine learning. 6 MACHINE LEARNING: THE POWER AND PROMISE OF COMPUTERS THAT LEARN BY EXAMPLE EXECUTIVE SUMMARY The Royal Society conducted research to Machine learning is a vibrant field of understand the views of members of the research, with a range of exciting areas public towards machine learning. While for further development across different most people were not aware of the term, methods and applications. In addition to they did know of some of its applications. those areas of research that address purely There was not a single common view, with technical questions, there is a collection attitudes, both positive and negative, varying of specific research questions where depending on the circumstances in which progress would directly address areas of machine learning was being used. Ongoing public concern around machine learning, engagement with the public will be important or constraints on its wider use. Support as the field develops. for research in these areas can therefore help ensure continued public confidence Machine learning applications can perform well in the deployment of machine learning at specific tasks. In many cases it can be used systems. These areas include algorithmic to augment human roles. Although it is clear interpretability, robustness, privacy, fairness, that developments in machine learning will inference of causality, human-machine change the world of work, predicting how this interaction, and security. will unfold is not straightforward, and existing studies differ substantially in their projections. While offering potential for new businesses or areas of the UK economy to thrive, the disruptive potential of machine learning brings with it challenges for society, and questions about its social consequences.
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