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IEEE SoutheastCon Conference

作者： Marum, Joao Paulo O. Jones, J. Adam Cunningham, H. Conrad Univ Mississippi Dept Comp & Informat Sci University MS 38677 USA

ISBN: (纸本)9781728101378

Developing new ways to improve game engines and enabling the creation of more accurate experiences is an important issue, especially for real-time applications such as Virtual Reality. As this technology has evolved, the gap between rendered frames has become smaller and environments have become more complex. As a result, mistakes can arise with regard to order-dependent events. Often these mistakes result in a temporarily unstable state in the environment, and may not be visible because of the time lapse between rendered frames. These errors are compounded by events which are not directly driven by the game engine, such as user movement and input. There is a continuous interaction between the user and the environment and the precise actions that user may take often cannot be predicted a priori. reactive programming is a still evolving paradigm that has been employed in many different applications such as robotics and user interfaces. Our research presents a reactive, dependency-based framework for game engines using associations between components to establish the order in which they update. Automated tests were developed to evaluate the framework and compare its performance to Unity3D's default update structure as well as an existing reactive programming framework.

关键词： reactive programming game engines dependency graph script

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Enabling reactive streams in HLA-based simulations through a model-driven solution 19

Enabling reactive streams in HLA-based simulations through a...

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Proceedings of the 23rd IEEE/ACM International Symposium on Distributed Simulation and Real Time Applications

作者： Andrea D'Ambrogio Alberto Falcone Alfredo Garro Andrea Giglio University of Rome Rome Italy University of Calabria Rende Italy

ISBN: (纸本)9781728129235

Modern systems are exposing an ever increasing degree of complexity also due to the heterogeneity of the involved components. Distributed simulation is widely recognized as an effective tool to carry out verification and validation activities for heterogeneous and complex systems. Unfortunately, the use of distributed simulation frameworks and related implementation technologies require a proper modeling and simulation know-how, as well as a significant effort and software development skills. As a result, distributed simulation is not typically addressed by systems engineers who do not have the required expertise or background. The MONADS model-driven method has been introduced to overcome such limitations and provide systems engineers with the ability to properly carry out simulation-based verification and validation activities. The method specifically addresses the HLA (High Level Architecture) distributed simulation framework and introduces an automated approach to generate a significant portion of the HLA code from system models specified in SysML, the standard modeling language in the systems engineering field. The automatically obtained code is then to be finalized by a manual programming activity. This paper contributes to make easier and further reduce the effort of such a manual activity by integrating the reactive features of the RxHLA framework into the MONADS method. This integration enables the use of streams to effectively manage HLA-based asynchronous interactions. The paper describes the technical details of the various strategies that can be used to integrate RxHLA into the MONADS method, thus providing a significant degree of flexibility to MONADS users.

关键词： high level architecture (HLA) reactive programming distributed simulation model-driven systems engineering

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Stream Fusion using reactive programming, LINQ and Magic Updates

Stream Fusion using Reactive Programming, LINQ and Magic Upd...

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International Conference on Information Fusion

作者： Gereon Schueller Andreas Behrend Fraunhofer FKIE University of Bonn

ISBN: (纸本)9781479902842

The paradigm of reactive programming has attained more and more interest in recent time. In this paper, we show why reactive programming is a well-suited paradigm for sensor fusion algorithms. As a new contribution, we show how the efficiency of stream-oriented reactive programs can be enhanced by applying the magic update method that originally stems from the field of update propagation in deductive databases.

关键词： reactive programming Magic Sorcery deductive databases Sensor fusion streams Fusion reactions Fusion, biological FUSION fusion (melting)

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Relation Algebra as programming language using the Ampersand compiler

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JOURNAL OF LOGICAL AND ALGEBRAIC METHODS IN programming 2018年 100卷 113-129页

作者： Joosten, Stef Open Univ Nederland Postbus 2960 NL-6401 DL Heerlen Netherlands Ordina NV Nieuwegein Netherlands

Relation Algebra can be used as a programming language for building information systems. This paper demonstrates the principle by presenting a case study together with the theory behind programming in Relation Algebra. As a case study, we have developed a database application for legal reasoning. We discuss a small part of it to illustrate the mechanisms of programming in Relation Algebra. Beside being declarative, relation algebra comes with attractive prospects for developing software. The compiler that was used for this case study, Ampersand, is the result of an open source project. Ampersand has been tried and tested in practice and is available as free open source software.(1) (C) 2018 Elsevier Inc. All rights reserved.

关键词： Relation Algebra Software development Legal reasoning Information systems design Ampersand reactive programming

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reactive Caching for Composed Services Polling at the Speed of Push

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PROCEEDINGS OF THE ACM ON programming LANGUAGES-PACMPL 2018年第OOPSLA期2卷 1–28页

作者： Burckhardt, Sebastian Coppieters, Tim Microsoft Res Redmond WA 98052 USA Vrije Univ Brussel Brussels Belgium

Sometimes, service clients repeat requests in a polling loop in order to refresh their view. However, such polling may be slow to pick up changes, or may increase the load unacceptably, in particular for composed services that disperse over many components. We present an alternative reactive polling API and reactive caching algorithm that combines the conceptual simplicity of polling with the efficiency of push-based change propagation. A reactive cache contains a summary of a distributed read-only operation and maintains a connection to its dependencies so changes can be propagated automatically. We first formalize the setting using an abstract calculus for composed services. Then we present a fault-tolerant distributed algorithm for reactive caching that guarantees eventual consistency. Finally, we implement and evaluate our solution by extending the Orleans actor framework, and perform experiments on two benchmarks in a distributed cloud deployment. The results show that our solution provides superior performance compared to polling, at a latency that comes close to hand-written change notifications.

关键词： Services Distributed programming reactive programming Actor Model Virtual Actors

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A lightweight push-pull mechanism for implicitly using signals in imperative programming

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JOURNAL OF COMPUTER LANGUAGES 2019年 54卷

作者： Zhuang, YungYu Natl Cent Univ Dept Comp Sci & Informat Engn 300 Zhongda Rd Taoyuan 32001 Taiwan

While signals can express time-varying values well, they heavily rely on the semantics of dataflow programming and functional programming. Several research have developed mechanisms for using signals with imperative object-oriented design and shown the benefits of its usage. However, they tend to introduce a class for signals, which thus results in the necessity of lifting up/down between variables and signals. We have already proposed an automation mechanism to expand event systems to support signals without introducing a class, and in this paper, we further extend it to a lightweight push-pull model by considering the direction of trigger. The push-pull automation mechanism allows programmers to choose between push and pull to declaratively express their intention and to reduce the overheads due to unnecessary propagation of value changes. To show the feasibility of our proposal, we implemented PuPPy as an extension to Python for helping programmers in declaring fields as signals. With PuPPy, programmers can use signals in Python without any event system and do not have to worry about the type of events and handlers. We evaluated PuPPy by running preliminary microbenchmarks and comparing with signal class libraries, pure event systems, and the implementation in our previous research.

关键词： Event-driven programming reactive programming Signal Behavior

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Distributed System Development with SCALALOCI

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PROCEEDINGS OF THE ACM ON programming LANGUAGES-PACMPL 2018年第OOPSLA期2卷 1–30页

作者： Weisenburger, Pascal Koehler, Mirko Salvaneschi, Guido Tech Univ Darmstadt Hsch Str 10 D-64289 Darmstadt Hessen Germany

Distributed applications are traditionally developed as separate modules, often in different languages, which react to events, like user input, and in turn produce new events for the other modules. Separation into components requires time-consuming integration. Manual implementation of communication forces programmers to deal with low-level details. The combination of the two results in obscure distributed data flows scattered among multiple modules, hindering reasoning about the system as a whole. The SCALALOCI distributed programming language addresses these issues with a coherent model based on placement types that enables reasoning about distributed data flows, supporting multiple software architectures via dedicated language features and abstracting over low-level communication details and data conversions. As we show, SCALALOCI simplifies developing distributed systems, reduces error-prone communication code and favors early detection of bugs.

关键词： Distributed programming Multitier programming reactive programming Placement Types Scala

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Java 9 High Performance 1

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2017年

作者： Ramgir Mayur Samoylov Nick

ISBN: (数字)9781787122307

ISBN: (纸本)9781787120785

Best practices to adapt and bottlenecks to avoid About This Book • Tackle all kinds of performance-related issues and streamline your development • Master the new features and new APIs of Java 9 to implement highly efficient and reliable codes • Gain an in-depth knowledge of Java application performance and obtain best results from performance testing Who This Book Is For This book is for Java developers who would like to build reliable and high-performance applications. Prior Java programming knowledge is assumed. What You Will Learn • Work with JIT compilers • Understand the usage of profiling tools • Generate JSON with code examples • Leverage the command-line tools to speed up application development • Build microservices in Java 9 • Explore the use of APIs to improve application code • Speed up your application with reactive programming and concurrency In Detail Finally, a book that focuses on the practicalities rather than theory of Java application performance tuning. This book will be your one-stop guide to optimize the performance of your Java applications. We will begin by understanding the new features and APIs of Java 9. You will then be taught the practicalities of Java application performance tuning, how to make the best use of garbage collector, and find out how to optimize code with microbenchmarking. Moving ahead, you will be introduced to multithreading and learning about concurrent programming with Java 9 to build highly concurrent and efficient applications. You will learn how to fine tune your Java code for best results. You will discover techniques on how to benchmark performance and reduce various bottlenecks in your applications. We'll also cover best practices of Java programming that will help you improve the quality of your codebase. By the end of the book, you will be armed with the knowledge to build and deploy efficient, scalable, and concurrent applications in Java. Style and approach This step-by-step guide provides real-world example

关键词： Java Java 9 Object oriented Garbage Collection Microbenchmarking JSON jshell reactive programming Multithreading Microservices APIs

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Extending a reactive Expression Language with Data Update Actions for End-User Application Authoring 18

Extending a Reactive Expression Language with Data Update Ac...

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31st Annual ACM Symposium on User Interface Software and Technology (UIST)

作者： Verou, Lea Alrashed, Tarfah Karger, David Ron MIT CSAIL Cambridge MA 02139 USA

ISBN: (纸本)9781450359481

Mavo is a small extension to the HTML language that empowers non-programmers to create simple web applications. Authors can mark up any normal HTML document with attributes that specify data elements that Mavo makes editable and persists. But while applications authored with Mavo allow users to edit individual data items, they do not offer any programmatic data actions that can act in customizable ways on large collections of data simultaneously or that modify data according to a computation. We explore an extension to the Mavo language that enables non-programmers to author these richer data update actions. We show that it lets authors create a more powerful set of applications than they could previously, while adding little additional complexity to the authoring process. Through user evaluations, we assess how closely our data update syntax matches how novice authors would instinctively express such actions, and how well they are able to use the syntax we provided.

关键词： Web design End-user programming Information architecture Semantic publishing Dynamic Media Web Query languages Data updates reactive programming

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reactive Server Interface Design for Real-Time Data Exchange in Multiple Data Source and Clients 9

Reactive Server Interface Design for Real-Time Data Exchange...

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9th International Conference on Information and Communication Technology Convergence (ICTC)

作者： Jeon, Dong-cheol Lee, Dae-hyung Hwang, Heejoung Gachon Univ Dept Comp Engn Gyeonggi Do South Korea

ISBN: (纸本)9781538650417

Various types of data are generated through IoT sensors or wearable devices as well as existing mobile and PC devices, and the amount of data to be processed in real-time has increased to quickly show information changes to users. reactive programming is a method for asynchronous programming among developers. It can process many threads efficiently with a small quantity of system resources and can process partial data changes in real-time without changing the whole system. In this paper, we propose an interface design for real-time data exchange server based on HL7 FHIR medical data.

关键词： reactive programming Real-Time Data Exchange Interface

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