Dinopolis is at the moment the most universal and extendable application framework available. It is fully written in Java and fully compliant to today’s application standards like Corba, RMI, DOM and XML. As a middleware system it provides access to arbitrary existing systems and supports combination of external systems in a way that they benefit from each other, although they do not even know ...

The objective of this work is to reduce the code size and runtime of Jini and Java so the entire system software stack fits in the limited ROM/RAM space of a ubiquitous device. Having identified the size bottleneck being the use of RMI and unnecessary functionalities in the context of ubiquitous devices, we 1) propose to exchange service description instead of service proxy between the lookup s...

Distributed object architectures and Java are important for building modern, scalable, web-enabled applications. This paper is focused on qualitative and quantitative analysis of two distributed object models for use with Java: CORBA and RMI. We compare both models in terms of features, maturity, legacy system support and ease of development. Focus is given to performances. We present performan...

The transfer rate of messages in distributed sensor network applications is a critical factor in a system's performance. The Sensor Abstraction Layer (SAL) is one such system. SAL is a middleware integration platform for abstracting sensor specific technology in order to integrate heterogeneous types of sensors in a network. SAL uses Java Remote Method Invocation (RMI) as its connection method,...

This paper presents a generalization of the Java Remote Method Invocation model (RMI) providing an efficient group communication mechanism for parallel programming. In our Group Method Invocation model (GMI), methods can be invoked on a local object, on a remote object or on a group of objects (possibly with personalized parameters). Likewise, result values and exceptions can be returned normal...

Distributed software problems are often addressed with object-oriented solutions. Objects provide the benefits of encapsulation and abstraction that have proven useful in managing the complexity of sequential code. However, the management of distributed objects is typically by means of complex APIs, such as CORBA, DCOM, or Java RMI. The complexity of the APIs is itself a hurdle to the writing o...

The key issue in distributed programming is partial failure: how to handle failures of part of the system. This unavoidable property causes uncertainty because we cannot know whether a remote object is ever going to reply to a message. It is also the reason why RMI/RPC is difficult to use. In this paper we describe the most convenient object-oriented mechanism we have found to develop peer-to-p...

CONTEXT Unrecognized myocardial infarction (MI) is prognostically important. Electrocardiography (ECG) has limited sensitivity for detecting unrecognized MI (UMI). OBJECTIVE Determine prevalence and mortality risk for UMI detected by cardiac magnetic resonance (CMR) imaging or ECG among older individuals. DESIGN, SETTING, AND PARTICIPANTS ICELAND MI is a cohort substudy of the Age, Gene/Env...

We study analytically and numerically the evolution of the two-dimensional coherent structure of bubbles and spikes in the Richtmyer-Meshkov instability (RMI) for fluids with a finite density ratio. New diagnostics and scalings are suggested for accurate quantification of RMI dynamics. New similarity features of the late-time instability evolution are observed. The results obtained can serve as...

In distributed object-oriented systems, objects belong to different locations. For example, in Java RMI, objects can be distributed over different JVM instances. Accessing a reference in RMI has crucial different semantics depending on whether the referred object is local or remote. Nevertheless, such references are not statically distinguished by the type system. This paper presents location t...