In this appendix, we develop and estimate a more complete model than the version presented in the main text. This more complete version more explicitly models the sequential search process where the user specifies a search strategy as a function of her preferences, decides which listings to click on to acquire additional information, and decides which of the clicked items to purchase, if any. W...

Cloud computing has emerged as one of the most needed technologies that houses software systems and relevant functional entities resulting in complex, multiuser, multitasking and virtualized environments. However, reliability of such high performance computing systems depends both on hardware and software. Virtualization is the technology that many cloud service providers rely on for efficient ...

The purpose of this study is to explore the learning environment and the learning technologies in a web environment. Our research is based on previous success with collaborative learning technology studies, which showed the objects should be the cores of the collaborative technologies. In keeping with this, our current research proposed a learning environment for collaborative learning, especia...

Model management is a metadata-based approach to database problems aimed at supporting the productivity of developers by providing schema manipulation operators. Here we propose MISM (Model Independent Schema Management), a platform for model management offering a set of operators to manipulate schemas, in a manner that is both model-independent (in the sense that operators are generic and appl...

Within the paper a description of communication model of plug-in based emuStudio emulation platform is given. The platform mentioned above allows the emulation of whole computer systems, configurable to the level of its components, represented by the plug-in modules of the platform. Development tasks still are in progress at the home institution of the authors. Currently the platform is exploit...

Software systems not only continue to grow more complex, but they are often required to run on multiple platforms as well. Common personal computer platforms are Microsoft Windows, Linux and Apple Mac OS X on a PowerPC or x86 hardware architecture. Hand-held devices present another range of platforms, such as Microsoft Windows Mobile, Qtopia/Embedix and Symbian running on an ARM or RISC hardwar...

The success of the e-learning paradigm observed in recent times created a growing demand for e-learning systems in universities and other educational institutions, that itself led to the development of a number of either commercial or open source learning management systems (LMS). While the usage of these systems gains recognition and acceptance amongst institutions, there are new problems aris...

This paper aims at demonstrating the benefits and importance of the service concept in the model-driven design of distributed applications. A service defines the observable behaviour of a system without constraining the system’s internal structure. We argue that by specifying application-level interaction aspects as a service, and designing application parts in terms of this service, the design...

Model-driven software engineering requires the refinement of abstract models into more concrete, platform-specific ones. To create and verify such refinements, behavioral models capturing reconfiguration or communication scenarios are presented as instances of a dynamic meta-model, i.e., a typed graph transformation system specifying the concepts and basic operations scenarios may be composed o...

Another component in Pattern-Oriented and Model-Driven Architecture (POMA) is the concept of model generation. The generation code of models is the process of creating a source code from a model using generation rules. In this paper, we present the generation rules that are used to support the automated code generator of POMA architecture to generate the source code of the entire interactive sy...