The law of one price (LOP) plays an important role as a building block in theories of international trade and exchange rate determination. It also serves as a measure of integration for international commodity markets. The LOP states that in competitive markets after adjustment for transportation costs and trade barriers, identical commodities sold in different countries should sell for the sam...

This paper describes design and implementation issues for introducing concurrency to object-oriented programming. Designing a concurrency class library along with an object-oriented concurrent program design method is presented as the prefered way to extend an existing object-oriented language. A set of classes designed to facilitate concurrent programming using the sequential object-oriented l...

Although pattern languages have already been proposed for security modelling, such languages mostly employ concepts and notations related to object-oriented systems, and have mainly neglected the agent-oriented paradigm. In this position paper we argue about the need to define a security pattern language applicable to agent-based systems that employs concepts based in the agent-oriented paradig...

Over the last ten years there has been a major shift in programming language design from procedural languages to object-oriented languages. Most universities have adopted an object-oriented language for their first programming course. However, far less consideration has been given to the program development environment. In this paper we argue that the environment is possibly more important than...

As aspect-oriented programming techniques move into mainstream use, it is likely that more software developers will be modeling systems with aspect-oriented features using the Unified Modeling Language. And with the Object Management Group considering revised standards for UML 2.0, it is an appropriate time to consider UML standards for aspect-oriented elements. This paper considers how aspect-...

One of the issues that developers of service-oriented systems currently discuss is the lack of practical, but formal modeling notations and tools that can address the many different, important aspects. This paper presents an approach to model structural and behavioral properties of service-oriented systems with UML and OCL models. Essential service-oriented concepts as service request, service ...

Since the emergence of the process-oriented approach to second language writing instruction two main questions have been what and how error feedback should be given to the students. The question of whether teachers should provide feedback on grammar in the writing assignments of English as a foreign language students, and if so how, has been a matter of considerable debate in the field of secon...

Deenitions of complexity are traditionally given relative to a relatively low-level, machine-oriented model of computation. As programming languages become more complex, the relation between a program and its machine model time, space, etc., complexities becomes less clear. An alternative is to provide a language-oriented deenition of complexity in terms of costs that make sense for that langua...

In this report we present the new standard tool of object oriented simulation, the object oriented programming language Modelica. Modelica is a modern language built on non-casual modeling with mathematical equations and object oriented constructs to facilitate reuse of modeling knowledge. The design of Modelica started in the continuous time domain since there is a common mathematical framewor...