다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Aspect] is a simple and practical aspect-oriented extension to Java With just a few new constructs, AspectJ provides support for modular implementation of a range of crosscutting concerns. In AspectJ's dynamic join point model, join points are well-defined points in the execution of the program; pointcuts are collections of join points; advice are special method-like constructs that can be attached to pointcuts; and aspects are modular units of crosscutting implementation, comprising pointcuts, advice, and ordinary Java member declarations. AspectJ code is compiled into standard Java bytecode. Simple extensions to existing Java development environments make it possible to browse the crosscutting structure of aspects in the same kind of way as one browses the inheritance structure of classes. Several examples show that AspectJ is powerful, and that programs written using it are easy to understand.

An overview of AspectJ

Digital Twin technology is an emerging concept that has become the centre of attention for industry and, in more recent years, academia. The advancements in industry 4.0 concepts have facilitated its growth, particularly in the manufacturing industry. The Digital Twin is defined extensively but is best described as the effortless integration of data between a physical and virtual machine in either direction. The challenges, applications, and enabling technologies for Artificial Intelligence, Internet of Things (IoT) and Digital Twins are presented. A review of publications relating to Digital Twins is performed, producing a categorical review of recent papers. The review has categorised them by research areas: manufacturing, healthcare and smart cities, discussing a range of papers that reflect these areas and the current state of research. The paper provides an assessment of the enabling technologies, challenges and open research for Digital Twins.

Digital Twin: Enabling Technologies, Challenges and Open Research

Digital twin can be defined as a virtual representation of a physical asset enabled through data and simulators for real-time prediction, optimization, monitoring, controlling, and improved decision making. Recent advances in computational pipelines, multiphysics solvers, artificial intelligence, big data cybernetics, data processing and management tools bring the promise of digital twins and their impact on society closer to reality. Digital twinning is now an important and emerging trend in many applications. Also referred to as a computational megamodel, device shadow, mirrored system, avatar or a synchronized virtual prototype, there can be no doubt that a digital twin plays a transformative role not only in how we design and operate cyber-physical intelligent systems, but also in how we advance the modularity of multi-disciplinary systems to tackle fundamental barriers not addressed by the current, evolutionary modeling practices. In this work, we review the recent status of methodologies and techniques related to the construction of digital twins mostly from a modeling perspective. Our aim is to provide a detailed coverage of the current challenges and enabling technologies along with recommendations and reflections for various stakeholders.

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Digital Twin: Values, Challenges and Enablers From a Modeling Perspective

Internet of Things (IoT) is reshaping the incumbent industry to smart industry featured with data-driven decision-making. However, intrinsic features of IoT result in a number of challenges, such as decentralization, poor interoperability, privacy, and security vulnerabilities. Blockchain technology brings the opportunities in addressing the challenges of IoT. In this paper, we investigate the integration of blockchain technology with IoT. We name such synthesis of blockchain and IoT as blockchain of things (BCoT). This paper presents an in-depth survey of BCoT and discusses the insights of this new paradigm. In particular, we first briefly introduce IoT and discuss the challenges of IoT. Then, we give an overview of blockchain technology. We next concentrate on introducing the convergence of blockchain and IoT and presenting the proposal of BCoT architecture. We further discuss the issues about using blockchain for fifth generation beyond in IoT as well as industrial applications of BCoT. Finally, we outline the open research directions in this promising area.

Blockchain for Internet of Things: A Survey

This paper describes domain interaction patterns, a pattern-based, high level coordination language, which provides a new way of integrating task and data parallelism. Coordination patterns are used to express task parallelism among a collection of data parallel High Performance Fortran (HPF) tasks. Patterns specify the interaction among domains involved in the application along with the processor and data layouts. The use of domains, i.e. regions together with some interaction information, improves pattern reusability. Data distribution belonging to the different HPF tasks is known at the coordination level. This is the key for both computational code reutilization and an efficient implementation of the communication among tasks. Besides that, our system implementation requires no change to the runtime system support of the HPF compiler used. In addition, a set of different implementation templates is provided in order to ease the programmer task. The suitability, expressiveness and efficiency of the language are shown by means of some examples.

http://www.biblioteca.uma.es/bbldoc/tesisuma/16642454.pdf

Domain interaction patterns to coordinate HPF tasks

SBASCO provides a new programming model for parallel and distributed numerical applications which exploits the combination of software components and skeletons. This paper presents an extension to both the model and implementation of SBASCO, so that the notion of aspect is applied in conjunction with the original paradigms. The objective is to achieve a higher level of modularity and reuse in parallel scientific codes and applications. Our aspects are managed as components which implement the (sequential or parallel) cross-cutting functionality. Aspects interact with the base code by means of connectors that express the cross-cutting nature of the target concerns. The way in which both aspect weaving and advice code execution are managed is critical for preserving the performance of applications. An implementation of the abstractions for distributed memory parallel systems based on MPI is discussed.

/pdf/adding-aspect-oriented-concepts-to-the-high-performance-tdn5dn2tex.pdf

Adding Aspect-Oriented Concepts to the High-Performance Component Model of SBASCO

This paper proposes the application of modern component-oriented technologies to the development of nuclear power plant simulators. On the one hand, as a significant improvement on previous simulators, the new kernel is based on the Common Component Architecture (CCA). The use of such a high-performance computing oriented component technology, together with a novel algorithm to automatically resolve simulation data dependencies, allows the efficient execution of both parallel and sequential simulation models. On the other hand, RT-CORBA is employed in the development of the rest of the applications that comprise the simulator. This real-time communication middleware not only makes the management of communications easier, but also provides the applications with real-time capabilities. Software components used in these two ways, simulation models integrating the kernel and distributed applications from which the simulator is comprised, improve the evolution and maintenance of the entire system, as well as promoting code reusability in other projects. Copyright © 2006 John Wiley & Sons, Ltd.

/pdf/experiences-with-component-oriented-technologies-in-nuclear-4k18plauqd.pdf

Experiences with component-oriented technologies in nuclear power plant simulators

This paper shows, by means of some examples, the suitability and expressiveness of a pattern-based approach to integrate task and data parallelism. Coordination skeletons or patterns express task parallelism among a collection of data parallel HPF tasks. Patterns specify the interaction among domains involved in the application along with the processor and data layouts. On the one hand, the use of domains, i.e. regions together with some interaction information, improves pattern reusability. On the other hand, the knowledge at the coordination level of data distribution belonging to the different HPF tasks is the key for an efficient implementation of the communication among them. Besides that, our system implementation requires no change to the runtime system support of the HPF compiler used. We also present some experimental results that show the efficiency of the model.

Enrique Soler

Papers

Domain interaction patterns to coordinate HPF tasks

Adding Aspect-Oriented Concepts to the High-Performance Component Model of SBASCO

Experiences with component-oriented technologies in nuclear power plant simulators

Integrating task and data parallelism by means of coordination patterns

Integrating task and data parallelism by means of coordination patterns