(I) A Declarative Framework for ERP Systems(II) Reactors: A Data-Driven Programming Model for Distributed Applications

To those who can be swayed by argument and those who know they do not have all the answers This dissertation is a collection of six adapted research papers pertaining to two areas of research. (I) A Declarative Framework for ERP Systems: • POETS: Process-Oriented Event-driven Transaction Systems. The paper describes an ontological analysis of a small segment of the enterprise domain, namely the general ledger and accounts receivable. The result is an event-based approach to designing ERP systems and an abstract-level sketch of the architecture. • Compositional Specification of Commercial Contracts. The paper de-scribes the design, multiple semantics, and use of a domain-specific lan-guage (DSL) for modeling commercial contracts. • SMAWL: A SMAll Workflow Language Based on CCS. The paper show

The AADL Constraint Annex

The SAE Architecture Analysis and Design Language -- AADL has been defined with a strong focus on the careful modeling of critical real-time embedded systems. Around this formalism, several analysis tools have been defined, e.g. scheduling, safety, security or performance. The SAE AS2-C wishes to complement the AADL with a versatile language to support project-specific analysis. The Model Constraints Sublanguage Annex (or in short the Constraints Annex) provides a standard AADL sublanguage extension with three major objectives: •to allow specification of project specific AADL language subsets and enforce consistent use of the language subset over all classifiers in a package and all packages in a project •to allow specification of project specific Structural Assertions on AADL instance models of component implementations and specification of Structural Assertions on classifier types (component types, feature group types and their extensions) •to allow the specification of Behavior Assertions for feature groups, component types and component implementations, grouped as Assumptions and Guarantees. Assumptions group together Behavior Assertions describing expected behavior of the environment in which a component will operate. Guarantees group together Behavior Assertions which must be honored by all instances of the component, assuming that it is deployed into an environment that honors the Assumptions Behavior Assertions. In this presentation, we will provide an overview of this language, and report on ongoing implementation efforts to date for this language

Norm Shifts in Union Wages: Will 1989 Be a Replay of 1969?

macroeconomics, union wages, 1989

The JKind Model Checker

JKind is an open-source industrial model checker developed by Rockwell Collins and the University of Minnesota. JKind uses multiple parallel engines to prove or falsify safety properties of infinite state models. It is portable, easy to install, performance competitive with other state-of-the-art model checkers, and has features designed to improve the results presented to users: inductive validity cores for proofs and counterexample smoothing for test-case generation. It serves as the back-end for various industrial applications.Comment: CAV 201

Lending Petri nets and contracts

Choreography-based approaches to service composition typically assume that, after a set of services has been found which correctly play the roles prescribed by the choreography, each service respects his role. Honest services are not protected against adversaries. We propose a model for contracts based on a extension of Petri nets, which allows services to protect themselves while still realizing the choreography. We relate this model with Propositional Contract Logic, by showing a translation of formulae into our Petri nets which preserves the logical notion of agreement, and allows for compositional verification

Skills and wage inequality in Greece: evidence from matched employer-employee data, 1995-2002

This paper examines changes in the Greek wage distribution over 1995-2002 and the role of skills in these changes using a matched employer-employee data set. This data set enables us to account for firm heterogeneity and obtain a more refined picture of the impact of skills. The methodology adopted is the Machado-Mata decomposition technique, which separates the part of wage changes that is due to changes in the job/employer and employee characteristics from the part due to changes in the returns to these characteristics. Our results indicate that the role of skills has been decisive. The skill return effects in combination with the composition effects of tenure, which are arguably responsive to economic developments and market conditions, have had an important contribution to the changes in the Greek wage distribution. On the other hand, the impact of predetermined demographic changes, as those captured by the age and education composition effects, has been relatively milder.Returns to skill; Wage inequality; Quantile regression