The value of knowledge assets in creating competitive advantage and subsequently wealth through innovation has never been greater (Teece, 1998). It is increasingly being acknowledged that the resources and the competencies developed within the organisation as well as the mechanisms for building up and reconfiguring these competencies is the only defence against a fierce competition (Penrose, 19...

The present paper describes the empirical evaluation of a linear algebra approach to model-based diagnosis, in case the behavioral model of the device under examination is described through a Petri net model. In particular, we show that algebraic analysis based on P-invariants of the net model, can signiicantly improve the performance of a model-based diagnostic system, while keeping the integr...

Problem-based learning (PBL) is an instructional design approach for promoting student learning, in context-rich settings. GlobalEd 2 (GE2) is PBL intervention that combines face-to-face and online environments into a 12-week simulation of international negotiations of science advisors on global water resource issues. The GE2 environment is described examining the impact it has had on middle sc...

From a developmental perspective, a central goal ofprevention is to alter behaviors that are already changing-that is, to redirect potentially risky trajectories. This multiwave panel study examines the longer-tem e f i t s of a prevention program on trajectories of alcohol misuse and related risk factors (susceptibility to peer pressure to misbehave and exposure to peer alcohol use). We concep...

AIMS To investigate the impact of alcohol consumption on risk decisions taken both individually and while part of a four- to six-person ad-hoc group. DESIGN A 2 (alcohol: consuming versus not consuming alcohol) × 2 (decision: individual, group) mixed-model design; decision was a repeated measure. The dependent variable was risk preference, measured using choice dilemmas. SETTING Opportunity...

Evaluating the intersection of two rational parameterized algebraic surfaces is an important problem in solid modeling. In this paper, we make use of some generalized matrix based representations of parameterized surfaces in order to represent the intersection curve of two such surfaces as the zero set of a matrix determinant. As a consequence, we extend to a dramatically larger class of ration...

This paper deals with the problem of identifying direct causal effects in recursive linear structural equation models. The paper provides a procedure for solving the identification problem in a special class of models.

This paper describes how a commonly used canonical form for linear differential-algebraic equations can be computed using numerical software from the linear algebra package LAPACK. This makes it possible to automate for example observer construction and parameter estimation in linear models generated by a modeling language like Modelica.

We present a new collision resolution scheme for cloth collisions. Our main concern is to find dynamically convincing resolutions, i.e. positions and velocities of cloth elements, for any kinds of collisions occuring in cloth simulation (cloth-cloth, cloth-rigid, and cloth-cloth-rigid). We define our cloth surface as connected faces of mass particles where each particle is controlled by its int...

The central aim of this study was to explore the academic engagement trajectories of a sample of recently arrived immigrant students from Latin America. Using an analytic framework that can dynamically model time-sensitive fluctuations (HLM; [Raudenbush, S. W., & Bryk, A. S. (2002). Hierarchicical Linear Models: Applications and Data Analysis Methods (2nd Edition ed.). Thousand Oaks, CA: Sage P...