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The aim of this thesis was to develop and to evaluate a method, which enables the utilization of traditional dialog marketing tools through the web. For this purpose, a prototype of a website with "extended real-time interaction (eEI)" capabilities has been implemented and tested. The prototype was evaluated by a methodology based on the five-dimensional "e-service quality" measure after Gwo-Guang Lee und Hsiu-Fen Lin. The Foundation of the "e-service quality" measure is the SERVQUAL-Model. A statistical analysis of the user study results showed a significant correlation between eEI and user satisfaction. Before the actual realization of eEI, the "Technology Acceptance Model" after Fred D. Davis was used to investigate currently used real-time interaction systems.
Die folgende Arbeit zeigt eine Möglichkeit auf, Lokalisierung eines Objektes mittels Ultraschall zu realisieren. Dazu werden drei bis fünf im Raum verteilte Sensoren genutzt, um anhand von Distanzinformationen die Position eines Objekts relativ zu den Positionen der Sensoren zu bestimmen. Eine Besonderheit besteht dabei darin, dass die Sensoren nahezu beliebig in der Ebene verteilt sein können. Ihre Anordnung wird vom System in der Kalibrierungsphase mit Unterstützung des Anwenders ermittelt. Dabei dürften ein gleichseitiges Dreieck, ein Quadrat oder Pentagramm je nach Sensoranzahl die besten Ergebnisse liefern. Um die relative Bewegung in eine Absolute zu übertragen, findet eine Umrechnung in Meter anhand der Taktung der Mikrocontroller, des Prescalers des verwendeten Timers und der Schallgeschwindigkeit statt.
The present thesis deals with the realization of a stepper motor driver on an 8-bit microcontroller by the company Atmel. The focus is on the devel- opment of a current control, which allows microstepping in addition to the basic modes of operation like full- and halfstep. For this purpose, a PI con- troller is derived using physical and control engineering principles, which is implemented on the microcontroller. In this context, essential knowledge for the practical implementation will be discussed. In addition, the development of the hardware is documented, which is of great significance for the current measurement.
The aim of this work was to present the accident and traffic modeling of Oman (Muskat City) under theoretical assumptions by means of agent-based simulation. TRASS should be taken as the basis for the simulation environment. In addition, possible counter-measures should be proposed with regard to the high accident rate, which result from different simulation variants.
It was not part of this work whether the theoretical assumptions by the simulation should actually be applied and implemented in reality.
It was also necessary to check whether three different simulation variants could be represented differently by TRASS. The three variants were divided into simulation sequence with traffic light control, without traffic light control and finally with traffic light control, which however should be ignored with a probability of 70%. All three variants could produce different results. It has been shown that all three variants have advantages and disadvantages with respect to traffic flow and accident rate.
Not to be neglected is the fact that this work is modeled, analyzed and evaluated exclusively with TRASS framework. All potentials and deficits thus flow into the overall framework of this work. Therefore, after critical observation, this statement was viewed from a single angle only: the theoretical assumptions of Oman and the modeling limits of TRASS. In order to be able to make a promising statement about the actual implementation of the proposals, further comprehensive analyzes and simulations are necessary in a much wider range of variants of transport for Oman.