I describe an approach to automatically convert web-sites into relational form. The approach relies on the existence of multiple types of substructure within a collection of pages from a web-site. Corresponding to each substructure is an expert that generates a set of simple hints for the particular collection. Each hint describes the alignment of some tokens within relations. An optimization a...

There is a pervasive tendency in organizational studies to view acts of communication in terms of the individual agent. It is the individual who speaks, writes, gestures, and so on; it is the individual we credit for effective speaking, just as it is the individualís ineffective listening that invites discredit. This tendency to focus on individual acts of expression is indeed unfortunate becau...

In the last decades the use of regression-like preference models has found widespread application in marketing research. The Conjoint Analysis models have even more been used to analyze consumer preferences and simulate product positioning. The typical data structure of this kind of models can be enriched by the presence of supplementary information observed on respondents. We suppose that rela...

Security-Aware Query Processing is the problem of computing answers to queries in the presence of access control policies. We present general impossibility results for the existence of optimal algorithms for Security-Aware Query Processing and classify query languages for which such algorithms exist. In particular, we show that for the relational calculus there are no optimal algorithms, wherea...

Relational data representations have become an increasingly important topic due to the recent proliferation of network datasets (e.g., social, biological, information networks) and a corresponding increase in the application of statistical relational learning (SRL) algorithms to these domains. In this article, we examine a range of representation issues for graph-based relational data. Since th...

The study of inductive and coinductive types (like finite lists and streams, respectively) is usually conducted within the framework of category theory, which to all intents and purposes is a theory of sets and functions between sets. Allegory theory, an extension of category theory due to Freyd, is better suited to modelling relations between sets as opposed to functions between sets. The ques...

We present a local relational reasoning method for reasoning about contextual equivalence of expressions in a λ-calculus with recursive types and general references. Our development builds on the work of Benton and Leperchey, who devised a nominal semantics and a local relational reasoning method for a language with simple types and simple references. Their method uses a parameterized logical r...

The purpose of the current study is to examine the association between self-esteem and the forms and functions of aggression. Research supports the existence of four aggressive subtypes (i.e., reactive overt, reactive relational, proactive overt, and proactive relational), and past research has found associations between aggression and self-esteem. However, past studies have not examined the re...

In this paper we identify desirable data management mechanisms for peer-to-peer (P2P) computing. P2P networks have to remain open and dynamic, while peers remain autonomous and need only be aware of their immediate acquaintances. In such a setting, we argue that one cannot assume the existence of a global schema for all the peer databases. Instead, one needs a data model which views the space o...