Science Citation Index 1992 Vols. for 1964- have guides and journal lists.
2020 11th IEEE International Conference on Cognitive Infocommunications (CogInfoCom) IEEE Staff 2020-09-23 CogInfoCom is a new interdisciplinary field of science defined as follows Cognitive infocommunications (CogInfoCom) investigates the link between the research areas of infocommunications and cognitive sciences, as well as the various engineering applications which have emerged as the synergic combination of these sciences The primary goal of CogInfoCom is to provide a systematic view of how cognitive processes can co evolve with infocommunications devices so that the capabilities of the human brain may not only be extended through these devices, irrespective of geographical distance, but may also interact with the capabilities of any artificially cognitive system This merging and extension of cognitive capabilities is targeted towards engineering applications in which artificial and or natural cognitive systems are enabled to work together more effectively
Learn Unity 4 for iOS Game Development Philip Chu 2013-06-18 Unity is an incredibly powerful and popular game creation tool, and Unity 4 brings even more great features, including Mechanim animation. Learn Unity 4 for iOS Game Development will show you how to use Unity with Xcode to create fun, imaginative 3D games for iPhone, iPad, and iPod touch. You'll learn how to optimize your game for both speed and quality, how to test and profile your game, and how to get the most out of your iOS device features, including the gyroscope and accelerometer. You'll also learn how to incorporate the latest Game Center improvements in iOS 6 into your game, how to make sure your game gets into the App Store, and even how to promote your app and track revenue. If you have a great 3D game idea, and you want to make it a reality in the App Store, then Learn Unity 4 for iOS Game Development has exactly what you need. What you’ll learn How to build, debug and test a Unity iOS game How to include iAds How to integrate Game Center leaderboards and achievements How to process touch, accelerometer and gyroscope input How to profile and optimize performance How to promote your app and track its revenue Who this book is for iOS developers interested in using Unity and Unity developers who want to customize their games for iOS devices. Table of ContentsChapter 1: Getting Started Chapter 2: A Unity Tour Chapter 3: Making a Scene Chapter 4: Making it Move: Scripting the Cube Chapter 5: Let's Dance! Animation and Sound Chapter 6: Let's Roll! Physics and Controls Chapter 7: Let's Bowl! Advanced Physics Chapter 8: Let's Play! Scripting the Game Chapter 9: The Game GUI Chapter 10: Using Unity iOS Chapter 11: Building for Real: Device testing and App Submission Chapter 12: Presentation: Screens and Icons Chapter 13: Handling Device Input Chapter 14: Game Center Chapter 15: iAds Chapter 16: Optimization Chapter 17: Where Do We Go from Here?
Mechanical & Manufacturing Engineering Al Emran Ismail 2013-04-10 Selected, peer reviewed papers from the 3rd International Conference on Mechanical & Manufacturing Engineering 2012, November 20 – 21, 2012, Malaysia. The conference offers a platform for researchers, academicians, technologist, policy makers, industrialists and students to share, discuss and highlight their research findings particularly works that related to research and technological developments and knowledge transfers keeping in mind the main theme Sustainable Engineering towards Green Technology
Learn Python 3 the Hard Way Zed A. Shaw 2017-06-26 You Will Learn Python 3! Zed Shaw has perfected the world’s best system for learning Python 3. Follow it and you will succeed—just like the millions of beginners Zed has taught to date! You bring the discipline, commitment, and persistence; the author supplies everything else. In Learn Python 3 the Hard Way, you’ll learn Python by working through 52 brilliantly crafted exercises. Read them. Type their code precisely. (No copying and pasting!) Fix your mistakes. Watch the programs run. As you do, you’ll learn how a computer works; what good programs look like; and how to read, write, and think about code. Zed then teaches you even more in 5+ hours of video where he shows you how to break, fix, and debug your code—live, as he’s doing the exercises. Install a complete Python environment Organize and write code Fix and break code Basic mathematics Variables Strings and text Interact with users Work with files Looping and logic Data structures using lists and dictionaries Program design Object-oriented programming Inheritance and composition Modules, classes, and objects Python packaging Automated testing Basic game development Basic web development It’ll be hard at first. But soon, you’ll just get it—and that will feel great! This course will reward you for every minute you put into it. Soon, you’ll know one of the world’s most powerful, popular programming languages. You’ll be a Python programmer. This Book Is Perfect For Total beginners with zero programming experience Junior developers who know one or two languages Returning professionals who haven’t written code in years Seasoned professionals looking for a fast, simple, crash course in Python 3
Software Evolution and Maintenance Priyadarshi Tripathy 2014-11-17
Human Machine Interaction Denis Lalanne 2009-03-27 Human Machine Interaction, or more commonly Human Computer Interaction, is the study of interaction between people and computers. It is an interdisciplinary field, connecting computer science with many other disciplines such as psychology, sociology and the arts. The present volume documents the results of the MMI research program on Human Machine Interaction involving 8 projects (selected from a total of 80 proposals) funded by the Hasler Foundation between 2005 and 2008. These projects were also partially funded by the associated universities and other third parties such as the Swiss National Science Foundation. This state-of-the-art survey begins with three chapters giving overviews of the domains of multimodal user interfaces, interactive visualization, and mixed reality. These are followed by eight chapters presenting the results of the projects, grouped according to the three aforementioned themes.
Search Based Software Engineering Federica Sarro 2016-09-23 This book constitutes the refereed proceedings of the 8th International Symposium on Search-Based Software Engineering, SSBSE 2016, held in Raleigh, NC, USA, in October 2016.The 13 revised full papers and 4 short papers presented together with 7 challenge track and 4 graduate student track papers were carefully reviewed and selected from 48 submissions. Search Based Software Engineering (SBSE) studies the application of meta-heuristic optimization techniques to various software engineering problems, ranging from requirements engineering to software testing and maintenance.
Software Architecture Carlos E. Cuesta 2018-09-19 This book constitutes the refereed proceedings of the 12th European Conference on Software Architecture, ECSA 2018, held in Madrid, Spain, in September 2018. The 17 full papers presented together with 7 short papers were carefully reviewed and selected from 96 submissions. They are organized in topical sections as follows: Self-Adaptive Architectures, IoT Architectures, Embedded and Cyber-Physical Systems, Microservices Architectures, Service-Oriented Architectures, Architectural Design Decisions, Software Architecture in Practice.
Trinity Tales Kathy Gilfillan 2011 These recollection, impressions and musings by Trinity College students in the 70s includes such luminaries as music impresario Paul McGuinness, theatre director Michael Colgan, writer James Ryan and a host of others who have all, in their different ways, shaped the Ireland of today.
Mining Software Engineering Data for Software Reuse Themistoklis Diamantopoulos 2020-03-30 This monograph discusses software reuse and how it can be applied at different stages of the software development process, on different types of data and at different levels of granularity. Several challenging hypotheses are analyzed and confronted using novel data-driven methodologies, in order to solve problems in requirements elicitation and specification extraction, software design and implementation, as well as software quality assurance. The book is accompanied by a number of tools, libraries and working prototypes in order to practically illustrate how the phases of the software engineering life cycle can benefit from unlocking the potential of data. Software engineering researchers, experts, and practitioners can benefit from the various methodologies presented and can better understand how knowledge extracted from software data residing in various repositories can be combined and used to enable effective decision making and save considerable time and effort through software reuse. Mining Software Engineering Data for Software Reuse can also prove handy for graduate-level students in software engineering.
Meaningful Stuff Jonathan Chapman 2021-08-03 An argument for a design philosophy of better, not more. Never have we wanted, owned, and wasted so much stuff. Our consumptive path through modern life leaves a wake of social and ecological destruction--sneakers worn only once, bicycles barely even ridden, and forgotten smartphones languishing in drawers. By what perverse alchemy do our newest, coolest things so readily transform into meaningless junk? In Meaningful Stuff, Jonathan Chapman investigates why we throw away things that still work, and shows how we can design products, services, and systems that last. Obsolescence is an economically driven design decision--a plan to hasten a product's functional or psychological undesirability. Many electronic devices, for example, are intentionally impossible to dismantle for repair or recycling, their brief use-career proceeding inexorably to a landfill. A sustainable design specialist who serves as a consultant to global businesses and governmental organizations, Chapman calls for the decoupling of economic activity from mindless material consumption and shows how to do it. Chapman shares his vision for an "experience heavy, material light" design sensibility. This vital and timely new design philosophy reveals how meaning emerges from designed encounters between people and things, explores ways to increase the quality and longevity of our relationships with objects and the systems behind them, and ultimately demonstrates why design can--and must--lead the transition to a sustainable future.
Machine Learning and Systems Engineering Sio-Iong Ao 2010-10-05 A large international conference on Advances in Machine Learning and Systems Engineering was held in UC Berkeley, California, USA, October 20-22, 2009, under the auspices of the World Congress on Engineering and Computer Science (WCECS 2009). Machine Learning and Systems Engineering contains forty-six revised and extended research articles written by prominent researchers participating in the conference. Topics covered include Expert system, Intelligent decision making, Knowledge-based systems, Knowledge extraction, Data analysis tools, Computational biology, Optimization algorithms, Experiment designs, Complex system identification, Computational modeling, and industrial applications. Machine Learning and Systems Engineering offers the state of the art of tremendous advances in machine learning and systems engineering and also serves as an excellent reference text for researchers and graduate students, working on machine learning and systems engineering.
Academic Writing and Publishing James Hartley 2008-04-22 Academic Writing and Publishing will show academics (mainly in the social sciences) how to write and publish research articles. Its aim is to supply examples and brief discussions of recent work in all aspects of the area in short, sharp chapters. It should serve as a handbook for postgraduates and lecturers new to publishing. The book is written in a readable and lively personal style. The advice given is direct and based on up-to-date research that goes beyond that given in current textbooks. For example, the chapter on titles lists different kinds of titles and their purposes not discussed in other texts. The chapter on abstracts instructs the reader on writing structured abstracts from the start.
Teaching Fundamental Concepts of Informatics Juraj Hromkovič 2010-01-08 This book constitutes the refereed proceedings of the fourth International Conference on Informatics in Secondary Schools - Evolution and Perspectives, ISSEP 2010, held in Zurich, Switzerland in January 2010. The 14 revised full papers presented together with 6 invited papers were carefully reviewed and selected from 32 submissions. A broad variety of topics related to teaching informatics in secondary schools is addressed ranging from national experience reports to paedagogical and methodological issues. Contributions solicited cover a variety of topics including but not limited to accessibility, assessment, classroom management, communication skills, computer science contests, computers and society, courseware, curriculum issues, research in informatics education, diagnostic teaching, empirical methods, ethical/societal issues, gender and diversity issues, high school/college transition issues, information systems, information technology, interdisciplinary courses and projects, laboratory/active learning, multimedia, object-oriented issues, pedagogy, student retention and persistence, role of programming and algorithmics, using emerging instructional, technologies and web-based techniques/web services.
TopCoder Cookbook TopCoder Inc. 2012-07-15 Ready to compete in TopCoder's programming contests? This guide offers an inside view of the competition from people successfully negotiated the process. You learn how the contests work, how the community interacts, and, most importantly, how to prepare. This book shows you how to sharpen your skills to take on the challenges you'll face, whether you're an experienced competitor or looking into TopCoder for the first time. Become familiar with the foundations of competitive programming—such as algorithms, problem analysis, testing, and other components—and learn what it takes to compete in TopCoder's prestigious contests. Discover how to join the community and start competing Understand the different kinds of TopCoder contests and how to approach them Learn algorithm choices and programming savvy with particular focus on TopCoder contests Get examples that demonstrate approaches across multiple languages
Fundamentals of Service Systems Jorge Cardoso 2015-12-12 This textbook addresses the conceptual and practical aspects of the various phases of the lifecycle of service systems, ranging from service ideation, design, implementation, analysis, improvement and trading associated with service systems engineering. Written by leading experts in the field, this indispensable textbook will enable a new wave of future professionals to think in a service-focused way with the right balance of competencies in computer science, engineering, and management. Fundamentals of Service Systems is a centerpiece for a course syllabus on service systems. Each chapter includes a summary, a list of learning objectives, an opening case, and a review section with questions, a project description, a list of key terms, and a list of further reading bibliography. All these elements enable students to learn at a faster and more comfortable peace. For researchers, teachers, and students who want to learn about this new emerging science, Fundamentals of Service Systems provides an overview of the core disciplines underlying the study of service systems. It is aimed at students of information systems, information technology, and business and economics. It also targets business and IT practitioners, especially those who are looking for better ways of innovating, designing, modeling, analyzing, and optimizing service systems.
2020 IEEE ACM 13th International Conference on Utility and Cloud Computing (UCC) IEEE Staff 2020-12-07 UCC is the premier IEEE ACM conference covering all areas related to Cloud Computing as a Utility and provides an international forum for leading researchers and practitioners in this important and still expanding field
Southern Missions Charles Reagan Wilson 2006 This book places the religious history of the American South in a global context. The global connections of southern religion reflect a tradition within the American South that historians have failed to examine. This study sweeps from the diversity of Christian and Jewish groups in the colonial South to the contemporary migration of ethnic groups and their religious traditions previously little known in the South. Perhaps most notably, gender emerges as a key analytical category for understanding the global reach of religion in the American South.
Giotto's O Andrew Ladis 2008 "A discussion of the murals by Giotto in the Arena Chapel of Padua, Italy. The artist's work is considered in terms of its relationship to the structure of the poetry of Dante, biblical exegesis, geometry, and symmetry"--Provided by publisher.
Biomedical Natural Language Processing Kevin Bretonnel Cohen 2014-02-15 Biomedical Natural Language Processing is a comprehensive tour through the classic and current work in the field. It discusses all subjects from both a rule-based and a machine learning approach, and also describes each subject from the perspective of both biological science and clinical medicine. The intended audience is readers who already have a background in natural language processing, but a clear introduction makes it accessible to readers from the fields of bioinformatics and computational biology, as well. The book is suitable as a reference, as well as a text for advanced courses in biomedical natural language processing and text mining.
Problems in Programming Andrej Vitek 1991-11-12 The book compiles solved problems from the high-school computer science competitions in Slovenia. The solutions are grouped by their subject into the following chapters: easy problems, comoputing, recursive functions, sorting and arranging, graphs, process control in real-time, computer graphics and other problems. Each chapter begins with an introduction, giving the common details of the solutions that follow in chronological order. The introductions and the themselves, embody the answers into a wider realm from which the problem originates, and reveal some of the background, that led to the formulation of the exercise. The programs, accompanying the solutions, indicate the esential characteristics of the proper programming style. The detailed analyses, accompanying some of the solutions, indicate that perfect programming requires not only the knowledge of a programming language, a bit of good will and a little of common sence, but quite a lot more.
Effective STL Scott Meyers 2001 "This is Effective C++ volume three - it's really that good." - Herb Sutter, independent consultant and secretary of the ISO/ANSI C++ standards committee "There are very few books which all C++ programmers must have. Add Effective STL to that list." - Thomas Becker, Senior Software Engineer, Zephyr Associates, Inc., and columnist, C/C++ Users Journal C++'s Standard Template Library is revolutionary, but learning to use it well has always been a challenge. Until now. In this book, best-selling author Scott Meyers ( Effective C++ , and More Effective C++ ) reveals the critical rules of thumb employed by the experts - the things they almost always do or almost always avoid doing - to get the most out of the library. Other books describe what's in the STL. Effective STL shows you how to use it. Each of the book's 50 guidelines is backed by Meyers' legendary analysis and incisive examples, so you'll learn not only what to do, but also when to do it - and why. Highlights of Effective STL include: Advice on choosing among standard STL containers (like vector and list), nonstandard STL containers (like hash_set and hash_map), and non-STL containers (like bitset). Techniques to maximize the efficiency of the STL and the programs that use it. Insights into the behavior of iterators, function objects, and allocators, including things you should not do. Guidance for the proper use of algorithms and member functions whose names are the same (e.g., find), but whose actions differ in subtle (but important) ways. Discussions of potential portability problems, including straightforward ways to avoid them. Like Meyers' previous books, Effective STL is filled with proven wisdom that comes only from experience. Its clear, concise, penetrating style makes it an essential resource for every STL programmer.
International Conference on Computer Networks and Communication Technologies S. Smys 2019 The book features research papers presented at the International Conference on Computer Networks and Inventive Communication Technologies (ICCNCT 2018), offering significant contributions from researchers and practitioners in academia and industry. The topics covered include computer networks, network protocols and wireless networks, data communication technologies, and network security. Covering the main core and specialized issues in the areas of next-generation wireless network design, control, and management, as well as in the areas of protection, assurance, and trust in information security practices, these proceedings are a valuable resource, for researchers, instructors, students, scientists, engineers, managers, and industry practitioners. .
Semantic Keyword-based Search on Structured Data Sources Jorge Cardoso 2016-01-06 This book constitutes the thoroughly refereed post-conference proceedings of the First COST Action IC1302 International KEYSTONE Conference on semantic Keyword-based Search on Structured Data Sources, IKC 2015, held in Coimbra, Portugal, in September 2015. The 13 revised full papers, 3 revised short papers, and 2 invited papers were carefully reviewed and selected from 22 initial submissions. The paper topics cover techniques for keyword search, semantic data management, social Web and social media, information retrieval, benchmarking for search on big data.
Deep Into Pharo Alexandre Bergel 2013 "Pharo is a clean, innovative, open-source, live-programming environment. Deep into Pharo is the second volume of a series of books covering Pharo. Whereas the first volume is intended for newcomers, this second volume covers deeper topics. You will learn about Pharo frameworks and libraries such as Glamour, PetitParser, Roassal, FileSystem, Regex, and Socket. You will explore the language with chapters on exceptions, blocks, small integers, and floats. You will discover tools such as profilers, Metacello and Gofer."--Open Textbook Library.
In Pursuit of the Traveling Salesman William Cook 2012 Covers the history, applications, theory, and computation of the traveling salesman problem right up to state-of-the-art solution machinery.
ICT Systems Security and Privacy Protection Marko Hölbl 2020-09-14 This book constitutes the refereed proceedings of the 35th IFIP TC 11 International Conference on Information Security and Privacy Protection, SEC 2020, held in Maribor, Slovenia, in September 2020. The conference was held virtually due to the COVID-19 pandemic. The 29 full papers presented were carefully reviewed and selected from 149 submissions. The papers present novel research on theoretical and practical aspects of security and privacy protection in ICT systems. They are organized in topical sections on channel attacks; connection security; human aspects of security and privacy; detecting malware and software weaknesses; system security; network security and privacy; access control and authentication; crypto currencies; privacy and security management; and machine learning and security.
PC Hacks Jim Aspinwall 2005 Presents information on getting the most out of a PC's hardware and software, covering such topics as upgrading the BIOS, configuring the hard drive, installing more RAM, improving CPU performance, and adding COM ports.
Software Evolution Tom Mens 2008-01-25 This book focuses on novel trends in software evolution research and its relations with other emerging disciplines. Mens and Demeyer, both authorities in the field of software evolution, do not restrict themselves to the evolution of source code but also address the evolution of other, equally important software artifacts. This book is the indispensable source for researchers and professionals looking for an introduction and comprehensive overview of the state-of-the-art.
A Reason Open to God J. Steven Brown 2013 With clarity and wisdom, Pope Benedict XVI sets out his vision for Catholic higher education in this first and only collection of his major addresses on the topic. What is the mission and identity of a Catholic university? What are the responsibilities of administrators, teachers, and students in Catholic institutes of higher learning? Where does the central theme of "love of God and others" fit into academia?
Conference on Software Engineering Education and Training Timothy Christian Lethbridge 2002 This volume originated from the 15th Conference on Software Engineering Education and Training and examines software design and development. It is aimed at researchers, professors, practitioners and students.
Functional and Logic Programming John P. Gallagher 2018-05-01 This book constitutes the proceedings of the 14th International Symposium on Functional and Logic Programming, FLOPS 2018, held in Nagoya, Japan, in May 2018. The 17 papers presented in this volume were carefully reviewed and selected from 41 submissions. They cover all aspects of the design, semantics, theory, applications, implementations, and teaching of declarative programming focusing on topics such as functional-logic programming, re-writing systems, formal methods and model checking, program transformations and program refinements, developing programs with the help of theorem provers or SAT/SMT solvers, language design, and implementation issues.
Open Source Systems Davide Taibi 2021-05-05 This book constitutes the refereed proceedings of the 17th IFIP WG 2.13 International Conference on Open Source Systems, OSS 2021, held virtually in May 2021. The 4 full papers and 3 short papers presented were carefully reviewed and selected from 23 submissions. The papers cover a wide range of topics in the field of free/libre open source software (FLOSS) and discuss theories, practices, experiences, and tools on development and applications of OSS systems, with a specific focus on two aspects:(a) the development of open source systems and the underlying technical, social, and economic issue, (b) the adoption of OSS solutions and the implications of such adoption both in the public and in the private sector.
The C++ Standard Library Nicolai M. Josuttis 2012-05-25 The Best-Selling C++ Resource Now Updated for C++11 The C++ standard library provides a set of common classes and interfaces that greatly extend the core C++ language. The library, however, is not self-explanatory. To make full use of its components–and to benefit from their power–you need a resource that does far more than list the classes and their functions. The C++ Standard Library: A Tutorial and Reference, Second Edition, describes this library as now incorporated into the new ANSI/ISO C++ language standard (C++11). The book provides comprehensive documentation of each library component, including an introduction to its purpose and design; clearly written explanations of complex concepts; the practical programming details needed for effective use; traps and pitfalls; the exact signature and definition of the most important classes and functions; and numerous examples of working code. The book focuses in particular on the Standard Template Library (STL), examining containers, iterators, function objects, and STL algorithms. The book covers all the new C++11 library components, including Concurrency Fractional arithmetic Clocks and timers Tuples New STL containers New STL algorithms New smart pointers New locale facets Random numbers and distributions Type traits and utilities Regular expressions The book also examines the new C++ programming style and its effect on the standard library, including lambdas, range-based for loops, move semantics, and variadic templates. An accompanying Web site, including source code, can be found at
UML Distilled Martin Fowler 2018-08-30 More than 300,000 developers have benefited from past editions of UML Distilled . This third edition is the best resource for quick, no-nonsense insights into understanding and using UML 2.0 and prior versions of the UML. Some readers will want to quickly get up to speed with the UML 2.0 and learn the essentials of the UML. Others will use this book as a handy, quick reference to the most common parts of the UML. The author delivers on both of these promises in a short, concise, and focused presentation. This book describes all the major UML diagram types, what they're used for, and the basic notation involved in creating and deciphering them. These diagrams include class, sequence, object, package, deployment, use case, state machine, activity, communication, composite structure, component, interaction overview, and timing diagrams. The examples are clear and the explanations cut to the fundamental design logic. Includes a quick reference to the most useful parts of the UML notation and a useful summary of diagram types that were added to the UML 2.0. If you are like most developers, you don't have time to keep up with all the new innovations in software engineering. This new edition of Fowler's classic work gets you acquainted with some of the best thinking about efficient object-oriented software design using the UML--in a convenient format that will be essential to anyone who designs software professionally.
Agent Intelligence Through Data Mining Andreas L. Symeonidis 2006-03-30 This book addresses the use of data mining for smarter, more efficient agents, as well as the challenge of generating intelligence from data while transferring it to a separate, possibly autonomous, software entity. Following a brief review of data mining and agent technology fields, the book presents a methodology for developing multi-agent systems, describes available open-source tools, and demonstrates the application of the methodology on three different cases.
Interviews with the Past United States. Bureau of Education 1937
Computational Intelligence in Pattern Recognition Asit Kumar Das 2020-02-19 This book features high-quality research papers presented at the 2nd International Conference on Computational Intelligence in Pattern Recognition (CIPR 2020), held at the Institute of Engineering and Management, Kolkata, West Bengal, India, on 4–5 January 2020. It includes practical development experiences in various areas of data analysis and pattern recognition, focusing on soft computing technologies, clustering and classification algorithms, rough set and fuzzy set theory, evolutionary computations, neural science and neural network systems, image processing, combinatorial pattern matching, social network analysis, audio and video data analysis, data mining in dynamic environments, bioinformatics, hybrid computing, big data analytics and deep learning. It also provides innovative solutions to the challenges in these areas and discusses recent developments.
The Golden Ticket Lance Fortnow 2017-02-28 The P-NP problem is the most important open problem in computer science, if not all of mathematics. Simply stated, it asks whether every problem whose solution can be quickly checked by computer can also be quickly solved by computer. The Golden Ticket provides a nontechnical introduction to P-NP, its rich history, and its algorithmic implications for everything we do with computers and beyond. Lance Fortnow traces the history and development of P-NP, giving examples from a variety of disciplines, including economics, physics, and biology. He explores problems that capture the full difficulty of the P-NP dilemma, from discovering the shortest route through all the rides at Disney World to finding large groups of friends on Facebook. The Golden Ticket explores what we truly can and cannot achieve computationally, describing the benefits and unexpected challenges of this compelling problem.

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