University of Paderborn

About: University of Paderborn is a education organization based out in Paderborn, Nordrhein-Westfalen, Germany. It is known for research contribution in the topics: Control reconfiguration & Software. The organization has 6684 authors who have published 16929 publications receiving 323154 citations.

Remark on uniqueness of weak solutions to the navier-stokes equations

Abstract: (N-S) du — Au + u • Vu + Vp = / in χ e Ω, 0 < t < Τ, at div u = 0 in χ e Ω, 0 < t < Τ, u = 0 on 3Ω, w|t=o a, where u = u(x,t) = («'(χ, i), · · •, u(x, t)) and ρ = p(x,t) denote the unknown velocity vector and pressure of the fluid at the point (x,t) € Ω χ (0,T), while α = a(x) = (a(x), • ••, a(x)) is the given initial velocity vector field; / = f(x, t) = ( f l { x , t), • • •, f(x, t)) is a given external force. The purpose of the present paper is to improve the criterion on uniqueness of weak solutions to (N-S) in the class ¿°°(0,Γ; £(Ω)). We know that for every a G Ζ£(Ω) and every / e ¿'(Ο,T; L(ù)), there exists at least one weak solution u of (N-S) satisfying the energy inequality. Here we mean by the weak solution a function u in L°°(0, Τ; Ζ^(Ω)) Π L 2 ( 0 , T ; H ^ m satisfying (N-S) in the sense of distributions (Definition of Section 1). For the energy inequality, see (1.1) below.

Affordable visual driver monitoring system for fatigue and monotony

Abstract: In this contribution we present a visual driver surveillance system to monitor the driver's head motion as well as the eye blink patterns. Based on these measured features the system is able to detect symptoms of fatigue and monotony. The main advantages of the presented system in contrast to existing ones is the usage of standard equipment to achieve a good cost-performance ratio, fast computation time, the possibility of measurements in darkness and the consideration of monotony. The image analysis is realized in a coarse-to-fine architecture. At first the driver's face is detected which is based on a boosted cascade of Haar wavelets. Then the eyes are searched in the face and occurring eye blinks measured by analyzing the optical flow of the eyes' region. The performance of the system was tested successfully under ideal and natural conditions.

Walk Your Talk: An Experimental Investigation of the Relationship between Word of Mouth and Communicators’ Loyalty

Abstract: Research provides ample evidence regarding the impact of word-of-mouth (WOM) communication on recipients. Service providers increasingly attempt to harness this power of WOM by introducing referral reward programs and other marketing instruments that aim to stimulate positive WOM. However, scholars have neglected to research the possibility that providing WOM also has consequences for the sender. Building on self-perception theory, this article argues that recommending a service provider improves the current customers’ loyalty to the provider and that positive WOM is not only effective for gaining but also for keeping customers. By conducting experiments in two different service settings, it is demonstrated that providing a recommendation influences the senders’ attitudinal and behavioral loyalty. The effect is found to be stronger for customers with low expertise in the service category and little experience with the provider. This means that encouraging customers in the early stages of their customer li...