Ralf Meyer

Karl Popp

This book is about ecosystem mechanics and how to generate revenue through ecosystems and partnerships in the software industry. Topics include: economic foundations, value chains, business and partnering models as well as examples from Google, Microsoft, SAP, OpenSource among many others. Preface by Karl-Heinz Streibich, CEO of Software AG and Executive Member of BITKOM, the German Federal Association for IT, Tele-communications and New Media on "Software Clusters". Industry Comments: Thomas Koulopoulos, Founder and CEO of Delphi Group, author of multiple bestselling books on IT and business trends, futurist, opinion leader www.TKspeaks.com "Complexity and scale of the software industry is daunting. Partnering in this maze of players and relationships is like climbing Everest without a guide. This book is your GPS to the software ecosystem. Popp and Meyer did a great job distilling and explaining essential principles, such as the software industry value chain, many types of business models, and how all these can be leveraged to help your business grow and thrive. This book is a must read for anyone trying to navigate the chaos of the software landscape " Franz Baljer, President of the International Association for SAP Partners www.ia4sp.org and SAP Alliance Manager at T-Systems."This book helps people in our industry since it provides deep insight into partnering and alliance management. We are proud that knowledge and experiences of our members have contributed to this book".

Business Models, Ecosystems and Partnerships in the Software Industry

Profit from Software Ecosystems

Friedrich Pfeiffer

Ard'shir Guran

The dynamics of dissipative mechanical and structural systems is being investigated at various institutions and laboratories worldwide with ever-increasing sophistication of modeling, analysis and experiments. This book offers a collection of contributions from these research centers that represent the state-of-the-art in the study of friction oscillators. It provides the reader with the fruits of a team effort by leaders in this fascinating field. The topics covered include friction modeling, self-excited friction oscillators, homogeneous frictional systems, unsteady lubricated friction, instantaneous contact geometry, impact damping, friction-induced instability and nonlinear dynamics of stick-slip systems, among other topics. This book gives a comprehensive picture of dynamics of dissipative mechanical and structural systems. It also gives an up-to-date account of the present state of the field. It will be of interest to engineers, rheologists, material scientists, applied mathematicians, physicists and historians of science and technology. Contents:Analysis of a Self-Excited Friction Oscillator with External Excitation (K Popp et al.)The Nonlinear Dynamics of Oscillators with Stick-Slip Friction (B Feeny)Dynamics of Homogeneous Frictional Systems (J Inaudi & J Kelly)Friction and Impact Damping in a Truss Using Pinned Joints (S Folkman et al.)Design of a Friction Damper to Control Vibration of Turbine Blades (J-H Wang)Modeling Unsteady Lubricated Friction (A Polycarpou & A Soom) Readership: Engineers, rheologists, materials scientists, applied mathematicians, physicists and historians of science and technology. keywords:

(Part I)

Dynamics with Friction: Modeling, Analysis and Experiment

Ardshir Guran

The dynamics of dissipative mechanical and structural systems is being investigated at various institutions and laboratories worldwide with ever-increasing sophistication of modeling, analysis and experiments. This book offers a collection of contributions from these research centers that represent the state-of-the-art in the study of friction oscillators. It provides the reader with the fruits of a team effort by leaders in this fascinating field.The topics covered include friction modeling, self-excited friction oscillators, homogeneous frictional systems, unsteady lubricated friction, instantaneous contact geometry, impact damping, friction-induced instability and nonlinear dynamics of stick-slip systems, among other topics.This book gives a comprehensive picture of dynamics of dissipative mechanical and structural systems. It also gives an up-to-date account of the present state of the field. It will be of interest to engineers, rheologists, material scientists, applied mathematicians, physicists and historians of science and technology.

Modeling, Analysis and Experiment

Dynamics with Friction

Werner Schiehlen

During the last decades completely new technologies for high speed railway vehicles have been developed. The primary goals have been to increase traction, axle load, and travelling speed, and to guarantee the safety of the passengers. However, new developments have revealed new limitations: settlement and destruction of the ballast and the subgrade lead to deterioration of the track; irregular wear of the wheels causes an increase in overall load and deterioration in passenger comfort; and damage of the running surfaces of the rail and the wheel is becoming more frequent. These problems have been investigated in the Priority Programme SPP 1015 supported by the Deutsche Forschungsgemeinschaft (DFG), with the goal of better understanding of the dynamic interaction of vehicle and track, and the long-term behavior of the components of the system. The book contains the scientific results of the programme as presented at the concluding colloquium held at University of Stuttgart, Germany, 2002.

System Dynamics and Long-Term Behaviour of Railway Vehicles, Track and Subgrade

Ground Vehicle Dynamics is devoted to the mathematical modelling and dynamical analysis of ground vehicle systems composed of the vehicle body, the guidance and suspension devices and the corresponding guideway. Automobiles on uneven roads and railways on flexible tracks are prominent representatives of ground vehicle systems. All these different kinds of systems are treated in a common way by means of analytical dynamics and control theory. In addition to a detailed modelling of vehicles as multibody systems, the contact theory for rolling wheels and the modelling of guideways by finite element systems as well as stochastic processes are presented. As a particular result of this integrated approach the state equations of the global systems are obtained including the complete interactions between the subsystems considered as independent modules. The fundamentals of vehicle dynamics for longitudinal, lateral and vertical motions and vibrations of automobiles and railways are discussed in detail.

Karl Popp

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