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

On blockchain and its integration with IoT. Challenges and opportunities

SBASCO is a new programming environment for the development of parallel and distributed high-performance scientific applications. The approach integrates both skeleton-based and component technologies. The main goal of the proposal is to provide a high-level programmability system for the efficient development of numerical applications with performance portability on different platforms. We present the system programming model which considers two different views of a component interface: one from the point of view of the application programmer and another thought to be used by a configuration tool in order to establish efficient implementations. This can be achieved due to the knowledge at the interface level of data distribution and processor layout inside each component. The programming model borrows from software skeletons a cost model enhanced by a run-time analysis, which enables one to automatically establish a suitable degree of parallelism and replication of the internal structure of a component.

/pdf/sbasco-skeleton-based-scientific-components-229esa9rpi.pdf

SBASCO: skeleton-based scientific components

http://www.biblioteca.uma.es/bbldoc/tesisuma/16639467.pdf

A Border-based Coordination Language for Integrating Task and Data Parallelism

Safety-Critical Systems (SCSs) often manage sensible data that must be trustworthy, especially in many cases in which different actors participate whose interests may not coincide. Blockchain is a disruptive technology that has emerged to ensure the trustfulness of data. The nuclear industry incorporates many SCSs where blockchain can be applied. This paper focuses on the use of blockchain for the inspection of steam generators of a nuclear power plant. This is a critical process where different actors participate: plant property, external companies in charge of the inspection itself and different administrations. It typically consists of a number of processes that explore the state of different components of the plant in order to find any kind of failure or defect and it generates a great amount of data that must be verifiable and trustworthy. A distributed blockchain-based system is presented where all the nodes share the information and it cannot be altered. As a novelty, automatic inspection algorithms are stored in the blockchain itself by means of smart contracts. The benefits of blockchain are studied for the nuclear industry in general and for the inspection process in particular. In order to explore the possible drawbacks of a blockchain-based system for data management, a simulator has been implemented to recreate the scenario of an inspection. The results obtained show that blockchain architectures are a good alternative to traditional information repositories for nuclear power plant inspections.

/pdf/integrating-blockchain-in-safety-critical-systems-an-3bhd1kjlrc.pdf

Integrating Blockchain in Safety-Critical Systems: An Application to the Nuclear Industry

Aspect-oriented programming enables developers to capture in separated aspect modules concerns that are spread over different components in a system. This paper is an attempt to apply this paradigm to high performance computing. Besides achieving the usual advantages of improved modularity, more reusable code that is easier to develop and maintain, we pursue to improve efficiency by means of dynamic changes of aspects at runtime. We present an aspect-oriented framework where scientific components and aspects are first-order entities (components) which interaction is established by means of what we have called aspect connectors. As an example, we focus on the communication aspect, which encapsulates the communication scheme among the set of components that set up a system. The expressiveness and suitability of the approach are shown by means of an application example.

/pdf/an-aspect-oriented-framework-for-scientific-component-syxia4f87n.pdf

Enrique Soler

Papers

On blockchain and its integration with IoT. Challenges and opportunities

SBASCO: skeleton-based scientific components

A Border-based Coordination Language for Integrating Task and Data Parallelism

Integrating Blockchain in Safety-Critical Systems: An Application to the Nuclear Industry

An aspect oriented framework for scientific component development