Automatic Data Normalization and Parameterization for Optical Motion Tracking

Methods for optical motion capture often require timeconsuming manual processing before the data can be used for subsequent tasks such as retargeting or character animation. These processing steps restrict the applicability of motion capturing especially for dynamic VR-environments with real time requirements. To solve these problems, we present two additional, fast and automatic processing stages based on our motion capture pipeline presented in [HSK05]. A normalization step aligns the recorded coordinate systems with the skeleton structure to yield a common and intuitive data basis across different recording sessions. A second step computes a parameterization based on automatically extracted main movement axes to generate a compact motion description. Our method does not restrict the placement of marker bodies nor the recording setup, and only requires a short calibration phase.

Scoping Electronic Communication Privacy Rules: Data, Services and Values

We use electronic communication networks for more than simply traditional telecommunications: we access the news, buy goods online, file our taxes, contribute to public debate, and more. As a result, a wider array of privacy interests is implicated for users of electronic communications networks and services. . This development calls into question the scope of electronic communications privacy rules. This paper analyses the scope of these rules, taking into account the rationale and the historic background of the European electronic communications privacy framework. We develop a framework for analysing the scope of electronic communications privacy rules using three approaches: (i) a service-centric approach, (ii) a data-centric approach, and (iii) a value-centric approach. We discuss the strengths and weaknesses of each approach. The current e-Privacy Directive contains a complex blend of the three approaches, which does not seem to be based on a thorough analysis of their strengths and weaknesses. The upcoming review of the directive announced by the European Commission provides an opportunity to improve the scoping of the rules.

Social Work Students’ Use of Knowledge in Direct Practice – Reasons, Strategies and Effects

This article describes a study of Swedish social work students’ use of knowledge during their field practice. Data was collected by using short written narratives, where the students reflect on situations from practice, situations they experienced as critical or problematic. The narratives were analysed with a method inspired by the interpretation theory of Paul Ricoeur. The article starts with a discussion adhering to the present trend of evidence-based social work practice. This is followed by a study of 144 narratives from social work students containing critical or problematic events. A quantitative description of the material as well as qualitative model of two type-strategies, that social work students use, is presented. The results show, among other things, that students use several forms of knowledge, where facts/evidence is one of several. The study also shows that there is a strong adaptation to varying critical situations. A conclusion is that it is difficult to a priori define the types and proportions of knowledge to use in social work practice.

Integrating structured and unstructured data in a business-intelligence-system

The recent liberalization of the German energy market has forced the energy industry to develop and install new information systems to support agents on the energy trading floors in their analytical tasks. Besides classical approaches of building a data warehouse giving insight into the time series to understand market and pricing mechanisms, it is crucial to provide a variety of external data from the web. Weather information as well as political news or market rumors are relevant to give the appropriate interpretation to the variables of a volatile energy market. Starting from a multidimensional data model and a collection of buy and sell transactions a data warehouse is built that gives analytical support to the agents. Following the idea of web farming we harvest the web, match the external information sources after a filtering and evaluation process to the data warehouse objects, and present this qualified information on a user interface where market values are correlated with those external sources over the time axis.

Context types in grammaticalization as constructions

In recent grammaticalization studies, the notion of “context types” has been employed to describe the successive diachronic stages that are associated with grammaticalization processes. It has been shown that a new grammatical function does not arise homogenously in all uses of the linguistic item concerned, but in its origin is bound to specific linguistic “contexts” or “constructions”. However, the notions of “context” as well as “construction” differ greatly among scholars, and research into the impact of constructions in grammaticalization scenarios, and into ways to formalized context types and constructions for diachronic purposes has only begun. The present study advances in this direction as it links the notion of context types of grammaticalization studies with central concepts of construction grammar. Using diachronic data from grammaticalization phenomena of German, successive types of contexts, i.e. critical contexts and isolating contexts, which are typically found in grammaticalization processes, are analyzed as specific types of idiomatic constructions in the sense the term is used in construction grammar.