The OMG Data-Distribution Service (DDS) is an emerging specification for publish-subscribe datadistribution systems. The purpose of the specification is to provide a common application-level interface that clearly defines the data-distribution service. The specification describes the service using UML, thus providing a platform-independent model that can then be mapped into a variety of concret...

OMG has published an unreliable multicast specification for distributed applications developed in CORBA (UMIOP). This mechanism can be implemented based on IP Multicast, a best-effort protocol, which provides no guarantees about the message delivery. However, many fault-tolerant or groupware applications demand more restrictive agreement and ordering guarantees (for instance, reliable multicast...

The Model Driven Architecture (MDA) of the Object Management Group (OMG) represents an approach of software development based on the use of models. The transformation of models is at the heart of the MDA (Model-Driven Architecture) approach. CIM to PIM transformation can be of a great support for domain experts and business analysts, but is not mentioned enough by OMG. Thus, we have decided to ...

OMG CORBA applications require a distributed naming service in order to install and to retrieve object references. High availability of the naming service is important since most CORBA applications need to access it at least once during their lifetime. Unfortunately , the OMG standards do not deal with availability issues; the naming services of many of the commercially available CORBA object r...

Themajor revision work for UML 2.0 is complete, and it is now an OMG Final Adopted Specification. This is a good time to reflect on UML’s future, and the future of modeldriven development. In April 2003 the U2 Partners submission team completed the final editing changes to the third revision of its Unified Modeling Language (UML) 2.0 Superstructure proposal, and submitted it to the Object Manag...

INTRODUCTION There are many adverse effects that have been described for isotretinoin. To the best of our knowledge, this is the first report of a possible association of oral isotretinoin intake with autoimmune thyroiditis and ocular myasthenia gravis (OMG). CASE PRESENTATION A 19-year-old Caucasian male, who had used oral isotretinoin for severe acne disease for the previous six months, was...

This paper addresses federation of transactional object standard OMG Object Transaction Service (OTS) with X/Open DTP Model and ISO OSI TP communication protocol. The two-phase commit propagation rules within a distributed transaction tree are similar in the X/Open, the ISO and the OMG models. Building an OTS on an OSI TP protocol machine is possible because the two specifications are somewhat ...

This paper addresses federation of a transactional object standard—Object Management Group (OMG) object transaction service (OTS)—with the X/Open distributed transaction processing (DTP) model and International Organization for Standardization (ISO) open systems interconnection (OSI) transaction processing (TP) communication protocol. The two-phase commit propagation rules within a distributed ...

Myasthenia gravis is an organ-specific autoimmune disorder generally thought to be caused by an antibody-mediated attack against the skeletal muscle nicotinic acetylcholine (Ach) receptor (AchR) at the neuromuscular junction. Extraocular muscle weakness and double vision are present in about 90% of patients with myasthenia gravis and are the predominant complaints in about 20% of patients, when...