Anonymität im Internet ist nicht gegeben, da Verkehrsdaten (Quellund Zieladressen) offen vorliegen. Ein Ansatz zur Gewährleistung von Anonymität sind die bekannten Mixe. Fast alle Vorschläge der Mixe für das Internet verzichten auf den Einsatz von Dummy-Nachrichten. Durch den Verzicht von Dummy-Nachrichten ist es verschiedenen Angriffsmethoden möglich, den Schutz zu kompromittieren. Der sogenan...

In data exchange, data are materialised from a source schema to a target schema, according to suitable source-to-target constraints. Constraints are also expressed on the target schema to represent the domain of interest. A schema mapping is the union of the source-to-target and of the target constraints. In this paper, we address the problem of containment of schema mappings for data exchange,...

To understand the potentials of bayesian panel data analysis, simulated data are used to estimate a random effects model. Prior Gaussian distributions of various precision are used to understand the influence of the prior information on continuous, discrete, time varying and time constant variables. It is demonstrated that parameters of dummy variables are far more sensitive to priors than para...

“Within” estimation of the fixed-effect stochastic frontier model does not identify parameters on time-invariant explanatory variables. If time-invariant variables are important production inputs, then standard efficiency estimates are biased. This note details bias correction, when time-invariant inputs are dummy variables. © 2006 Elsevier B.V. All rights reserved.

In Section 5 below we use the notation for volume integrals as explained in Chapter 4 of Vol.II of [FDS]. In particular, let a mapping h : D −→ W be given whose domain D is a region in a Euclidean space, a vector space, or the real line, and whose codomain W is a linear space. Then, the volume integral of h over a suitable subregion P of D, if meaningful, is denoted by ∫ P h or ∫ P h(x)dx. In t...

We propose two transformations on term rewrite systems (TRSs) based on reducing right hand sides: one related to the transformation order and a variant of dummy elimination. Under mild conditions we prove that the transformed system is terminating if and only if the original one is terminating. Both transformations are very easy to implement, and make it much easier to prove termination of some...

ABSTRACT The present study evaluates shoulder kinematics of the Hybrid III and THOR NT, with the first version of a new shoulder design (SD-1), in 45° far-side, full frontal and 30° near-side collisions. In total eleven dummy tests were conducted in the three collision angles, while film and instrument data were generated and compared with those of PMHS data from Törnvall (2008). For the 45° fa...

This paper presents the integration of cohesive properties of text with coherence relations, to obtain an adequate representation of text for automatic summarization. A summarizer based on Lexical Chains is enchanced with rhetorical and argumentative structure obtained via Discourse Markers. When evaluated with newspaper corpus, this integration yields only slight improvement in the resulting s...

In project scheduling, the free float (slack) of an activity represents the leeway for scheduling the activity without affecting any subsequent activity. In the context of activity-on-arrow (AOA) network representation, textbooks on project management, based on our survey, have for decades been using a popular formula to calculate free floats that may lead to erroneous results in the presence o...

To ensure privacy for route planning applications and other location based services (LBS), the service provider must be prevented from tracking a user’s path during navigation on the application level. However, the navigation functionality must be preserved. We introduce the algorithm PARTS to split route requests into route parts which will be submitted to an LBS in an unlinkable way. Equipped...