In this paper, we investigate extreme events in high frequency, multivariate FX returns within a purposely built framework. We generalize univariate tests and concepts to multidimensional settings and employ these novel techniques for parametric and nonparametric analysis. In particular, we investigate and quantify the co-dependence of cross-sectional and intertemporal extreme events. We find e...

Abstract We propose a very general, unifying framework for the concepts of dependence and independence. For this purpose, we introduce notion diversity rank . By means identify total determination with inability to create more diversity, independence presence maximum diversity. show that our theory covers variety concepts, example seemingly unrelated linear in algebra variables logic.

This paper revisits three important concepts in fractal type network traffic, namely, self-similarity (SS), long-range dependence (LRD), and local self-similarity (LSS). Based on those concepts, we address the reason why the local properties of fractional Gaussian noise (fGn) are contained in the global properties of fGn and vice versa, which may be a limitation of fGn in data traffic modeling....

The empirical concept of internal friction was introduced 20 years ago. This review summarizes the results of experimental and theoretical studies that help to uncover the nature of internal friction. After the history of the concept, we describe the experimental challenges in measuring and interpreting internal friction based on the viscosity dependence of enzyme reactions. We also present spe...

This paper describes a method for estimating insurance claims or risk premiums allowing for spatial dependence as well as explanatory factors. The concepts are related to those used for graduation of mortality tables using cubic splines but extended to spatial dependence as found in many insurance products. Firstly techniques for measuring spatial dependence are reviewed. Then models with bivar...

This paper deals with several problems concerning notion of existential dependence and ontological notions of existence, necessity and fusion. Following some ideas of Eugenia Ginsberg-Blaustein, the notions are treated in reference to objects, in relation to the concepts of state of affairs and subject of state of affairs. It provides an axiomatic characterization of these concepts within the f...

Algorithms that find connections between concepts in semantic networks are inherently inefficient due to their dependence on piecemeal representation of potential paths. A method of reorganizing a link-based network into a path-based representation is argued to allow more efficient search techniques. A path-based representation is presented in terms of the knowledge representation language Conc...

The long-term success of e-government initiatives is of paramount importance, especially for developing countries, which face challenges such as limited budget, donor dependence, transfer of technology, short-term involvement of non-local agents, and relatively unstable political and economic environment. Although e-government success and sustainability are both relevant concepts to assess IT-e...

In this paper we propose a foundational ontology of the social concepts of organization and role which structure institutions. We identify which axioms model social concepts like organization and roles and which properties distinguish them from other categories like objects and agents: the organizational structure of institutions and the relation between roles and organizations. All social conc...

The effects of relevant concreteness on learning and transfer were investigated. Sixth grade students learned artificial instantiations of a simple mathematical concept. Some students were presented with instantiations that communicated concreteness relevant to the to-be-learned concept, while others learned generic instantiations involving abstract symbols. Results suggest that relevant concre...