Ovsei Gelman

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This paper considers the problem of scaling the proposal distribution of a multidi-mensional random walk Metropolis algorithm, in order to maximize the eeciency of the algorithm. The main result is a weak convergence result as the dimension of a sequence of target densities, n, converges to 1. When the proposal variance is appropriately scaled according to(More)
A formal conceptualization of the original concept of system and related concepts—from the original systems approach movement—can facilitate the understanding of information systems (IS). This article develops a critique integrative of the main IS research paradigms and frameworks reported in the IS literature using a systems approach. The effort seeks to(More)
In the new economic context, based on Information and Knowledge resources, the concepts of Information Systems and Information Technology (IS&IT) are fundamental to understand the organizational and managerial process in all levels: strategic, tactic and operational. From an academic and practitioner perspective, we pose that the correct use of the concept(More)
The general aim of Systems Engineering (SE) and Software Engineering (SwE) is the definition, development and deployment of large-scale cost-effective and trustworthy integrated systems and software-intensive systems respectively. In pursuit of this aim, both disciplines have generated models and standards of processes to guide and control the engineering(More)
Product or company names used in this set are for identification purposes only. Inclusion of the names of the products or companies does not indicate a claim of ownership by IGI Global of the trademark or registered trademark. Information technology governance and service management : frameworks and adaptations / Aileen Cater-Steel, editor. p. cm. Summary:(More)
In this chapter, we report the design of an ontology (called onto-ServSys) for the relevant service system construct used in the Service Science, Management and Engineering (SSME) arena. These conceptual artifacts have been used to establish a non-ambiguous and common set of basic constructs for supporting automated reasoning on a domain of interest in(More)
Conceptual Research a non-empirical research methodis among the three most used research methods in the discipline of Information Systems. However, its principles and foundations are implicitly used by researchers. Thus, its importance for advancement and development of the IS discipline is underestimated when it is compared with empirical research methods.(More)