Konferenzvorträge
Probabilistic Mid- and Long-Term Electricity Price Forecasting: A supply and demand curves based approach
Florian Ziel:
Energy Finance Seminar, 19.04.2017, Stolberg (Harz).
Einführung in das Verständnis von Zeitreihen
Florian Ziel:
Mathematik-Wettbewerb 12.Klasse, 30.03.2017, C.F.Gauß-Gymnasium Frankfurt(Oder).
Prognose von Strompreisen
Florian Ziel:
IUTA, 23.03.2017, IUTA Duisburg.
On Proper Forecast Evaluation Based on the Energy Score and the Diebold-Mariano Test
Florian Ziel:
S3-Seminar (Science meets Social Science), 16.03.2017, Wrolaw University of Technology.
Investigation of Short Term Load Forecasts of Low Voltage Level Substation Feeders and the Effects of Weather
Florian Ziel:
4th LV workshop: Demand analytics and control for networks support, 01.03.2017, Reading, UK.
Modelling and Forecasting of Electricity Load
Florian Ziel:
13th Workshop on Stochastic Models, Statistics and Their Applications, 24.02.2017, HU Berlin.
Electricity Price Forecasting using Sale and Purchase Curves: The X- Model
Florian Ziel:
Strommarkttreffen - Thema: Strompreismodellierung, 10.02.2017, Innogy, Berlin.
Valorization of aggregated decentral flexibilities - Opportunities and challenges under the current German regulatory framework and market conditions
Dietrich, A.; Weber, C.:
smarter europe conference, 09.02.2017, Essen.
Herausforderungen der Energiewende im Quartier
Frensemeier, E.; Hemkendreis, C.; Baginski, P.; vom Hofe, M.:
Forschungskolloquium, 31.01.2017, Dortmund.
Stochastic Valuation of Battery Storage Systems in Second Life Applications
Dietrich, A.; Böcker, B.; Weber, C.:
International Conference on Operations Research, 31.08.2016, Hamburg.
Energy Efficiency in Districts – Non-technical Drivers
Baginski, P.:
IEEE Power and Energy Society General Meeting 2016, 19.07.2016, Boston, USA.
Stochastic Storage Valuation Consicering Aging Processes (Lithium-Ion)
Böcker, B.; Dietrich, A.; Weber, C.:
28th European Conference on Operational Research, 04.07.2016, Poznan, Polan.
Estimating the value of flexibility from real options - on the adequate specification of hybrid electricity price models
Pape, C.; Woll, O.; Weber, C.:
39th IAEE conference, 20.06.2016, Norwegian school of economics (NHH), Bergen.
CHP Plant Operation and Electricity Prices - Analytical Insights and Large-Scale Model Application
Felten, B.:
39th IAEE International Conference, 20.06.2016, Bergen.
Erlöspotenziale für Flexibilitäten im Stromsystem
Dietrich, A.:
8. Branchentag Windenergie, 14.06.2016, Düsseldorf.
Modeling Flow-Based Market Coupling – Theoretical Insights and Large-Scale Model Application
Felling, T.; Felten, B.; Niesen, L; Osinski, Paul; Weber, C.:
11. ÖGOR-IHS Workshop & ÖGOR Arbeitskreis 2016 "Mathematische Ökonomie und Optimierung in der Energiewirtschaft“, 28.04.2016, Wien.
Optimal reliability and reserve provision in electricity markets with increasing shares of renewable energy sources – analytical insights
Fridrik M. Baldursson, Julia Bellenbaum, Ewa Lazarczyk, Lenja Niesen, Christoph Weber:
IEEE Energycon 2016, 08.04.2016, Leuven, Belgien.
Identifying price zones using nodal prices and supply & demand weighted nodes
Felling, T.; Weber, C.:
IEEE Energycon2016, 07.04.2016, Leuven, Belgien.
Photovoltaics and Heat Pumps – Limitations of Local Pricing Mechanisms
Felten, B.; Weber, C.; Raasch, J.:
Smart Energy Research at the crossroads of Engineering, Economics and Computer Science (SmartER Europe) 2016, 18.02.2016, Essen.
Marktgebietszuschnitte als Chance / Customizing market areas – Do new designs for market areas solve current problems?
Felling, T.; Weber, C.:
eWorld Kongress “Aktuelle Entwicklungen im Portfolio- und Risikomanagement – Flexibilität unter sich ändernden Rahmenbedingungen“, 17.02.2016, Essen.
Wovon hängt der Wert von Speichern im zukünftigen Energiesystem ab? - Diskussion an aktuellen Ergebnissen
Böcker, B.; Weber, C:
"Energy Transition"-Forum - Smart Energy - E-world, 17.02.2016, Essen, Germany.
Are Fundamentals Enough? Explaining Price Variations in the German Day-Ahead and Intraday Power Market - Invited talk on the issues of intraday market design
Pape, C.; Hagemann, S.; Weber, C.:
Seminar of the Chaire CEEM , 08.12.2015, University Paris Dauphine.
(Warum) Funktioniert die Energiewende nicht mit dem Markt?
Weber, C.:
IER Jubiläum, 09.10.2015, Stuttgart.
Contribution of Local Pricing to the Integration of Renewable Energy Sources in Distribution Grids
Felten, B.; Raasch, J.; Weber, C.:
10th Conference on Sustainable Development of Energy, Water and Environment Systems, 01.10.2015, Dubrovnik, Croatia.
A parsimonious fundamental model for wholesale electricity markets - Analysis of the plunge in German futures prices
Kallabis, T.; Pape, C.; Weber, C.:
10th sdewes , 29.09.2015, Dubrovnik.
Incentives for self-consumption and future penetration of residential PV battery storage systems: The german case
Dietrich, A.; Weber, C.:
38th IAEE International Conference, 26.05.2015, Antalya, Turkey.
Contribution of Local Pricing to the Integration of Renewable Energy Sources in Distribution Grids
Weber, C.; Felten, B.; Raasch, J.:
38th IAEE International Conference, 26.05.2015, Antalya, Turkey.
Different Storages and Different Time-Variable Operation Modes of Energy Storages in Future Electricity Markets
Böcker, B.; Weber, C:
12th International Conference on the European Energy Market, 22.05.2015, Lisbon, Portugal.
Probabilistic welfare analysis for system adequacy - analytical and numerical insights
Bellenbaum, J.; Weber, C.:
Enerday 2015 - 10th Conference on Energy Economics and Technology, 17.04.2015, Dresden.
A parsimonious fundamental model for wholesale electricity markets -Analysis of the plunge in German futures prices
Kallabis, T.; Pape, C.; Weber, C.:
EnerdayDresden, 17.04.2015, Dresden.
Impacts of Dynamic Probabilistic Reserve Sizing Techniques on Reserve Requirements and System Costs
Bucksteeg, M.; Niesen, L.; Weber, C.:
Enerday 2015, 17.04.2015, Dresden.
The German Energiewende – following a long‐term vision irrespective of costs?
Weber, C.:
Austin Electricity Conference, 10.04.2015, .
The German Energiewende - following a long-term vision irrespective of costs
Weber, C.:
Austin Electricity Conference, 10.04.2015, Austin.
Storage Evaluation in congested Grids
Böcker, B.; Kippelt, S.; Rehtanz, C.; .Weber, C.:
5th International International Ruhr Energy Conference, 25.03.2015, Essen, Germany.
Einführung von Preiszonen in Deutschland – Implikationen für die Integration des europäischen Strommarkts
Bucksteeg, M.; Trepper, K.; Weber, C.:
Symposium Energiehandel 2022, 18.03.2015, Berlin.
Auswirkungen situativer Regelleistungsbemessung auf die Vorhaltekosten
Bucksteeg, M.; Niesen, L.; Weber, C.:
IEWT 2015, 12.02.2015, Wien.
Storage Evaluation in congested Grids
Böcker, B.; Kippelt, S.; Rehtanz, C.; .Weber, C.:
SmartER Europe / E-World, 12.02.2015, Essen, Germany.
Viertelstundenhandel im deutschen Spotmarkt - Empirische Ergebnisse und Perspektiven
Pape, C.:
E-World 2015: Aktuelle Entwicklungen im Portfolio- und Risikomanagement, 11.02.2015, Essen.
Intradayhandel – Aktuelle Fragen an der Schnittstelle zwische Theorie und Praxis
Weber, C.:
EWI/FAZ-Tagung, 18.11.2014, Köln.
Probabilistic welfare analysis for system adequacy - analytical insights
Bellenbaum, J.; Weber, C.:
14th IAEE European Energy Conference, 31.10.2014, Rome, Italy.
Economically optimized operation of heat pumps in a smart grid environment
Felten, B.; Raasch, J.; Weber, C.:
International Conference on Operations Research 2014, 04.09.2014, Aachen.
Price determinants and their impact on day-ahead and intraday market prices - Explaining the differences
Pape, C.; Hagemann, S.; Weber, C.:
IFORS 2014, 18.07.2014, Barcelona.
Capacity Markets in Europe - Assessing the Benefits of Coordinated Mechanisms versus National Approaches
Bucksteeg, M.; Weber, C.:
IFORS 2014 Conference, 15.07.2014, Barcelona.
Capacity Markets in Europe - Assessing the Benefits of Coordinated Mechanisms versus National Approaches
Bucksteeg, M.; Weber, C.:
37th IAEE International Conference, 17.06.2014, New York.
Photovoltaics and storage plants: Efficient capacities in a system view
Böcker, B.; Weber, C.:
37th IAEE International Conference, 17.06.2014, New York, USA.
Kapazitätsmechanismen in Europa – Quantitative Wirkungsanalyse von nationalen Alleingängen versus koordinierten Mechanismen
Bucksteeg, M.; Weber, C.:
13. Symposium Energieinnovation, 14.02.2014, Graz.
Lessons learnet from the German Renewables Experience
Weber, C.:
Harvard Electricity Policy Group, 73rd Plenary Session, 13.12.2013, Marana, Arizona.
Einfluss der erneuerbaren Einspeisung und Lastsituation auf die Net Transfer Capacity
Bucksteeg, M.; Trepper, K.; Weber, C.:
10. VDI-Fachtagung „Optimierung in der Energiewirtschaft“, 14.11.2013, Köln.
Forecasting the distribution of hourly electricity spot prices - – Accounting for serial correlation patterns and non-normality of price distribution
Pape, C.; Weber, C.; Woll, O.:
international OR (Operations Research) , 04.09.2013, Rotterdam.
Towards An Integrated German Regulating Power Market - Benefits And Challenges
Bucksteeg, M.; Weber, C.:
13th European IAEE Conference 2013, 21.08.2013, Düsseldorf.
Storages in future power systems and their impact on efficient capacities
Böcker, B.; Weber, C.:
13th European IAEE Conference, 19.08.2013, Düsseldorf, Germany.
Probabilistic Wind Power Forecasting in Transmission Grids - Making use of Spatial Correlation
Becker, R.; Weber, C.:
WIPFOR: 2nd Workshop on Industry & Practices for Forecasting, 06.06.2013, Paris, Frankreich.
Forecasting the distribution of hourly electricity spot prices - – Using principal component decomposition and ARMA-GARCH specification
Pape, C.; Weber, C.; Woll, O.:
WIPFOR (Workshop on Industry & Practices for Forecasting), 06.06.2013, Paris.
Dynamic Electricity Markets - The Peak-Load Pricing Model as a Control Theoretic Problem
Raasch, J.; Weber, C.:
30.05.2013, Stockholm.Die Rolle von Speichern im zukünftigen Elektrizitätssystem - eine ökonomische Gleichgewichtsbetrachtung
Weber, Steffen:
Fakultätskolloquium TU Dresden, 28.05.2013, Dresden.
Ausgestaltung von Strommärkten im Hinblick auf ein geeignetes Engpassmanagement
Schmitz, K.; Weber, C.:
Abschlussworkshop des Forschungsprojekts Marktdesign für nachhaltige regionale elektrische Energiemärkte 2013, 07.05.2013, Essen.
Ausgestaltung von Produkten und Handelsplattformen für dezentrale Akteure
Bucksteeg, M.; Weber, C.; Himmes, P.:
Abschlussworkshop des Forschungsprojekts: „Marktdesign für nachhaltige regionale elektrische Energiemärkte“, 07.05.2013, Essen.
An integrated approach to model redispatch and assess potential benefits from market splitting in Germany
Schmitz, K.; Bucksteeg, M.; Weber, C.:
Enerday, 24.04.2013, Dresden.
Untersuchung der Auswirkungen von Market Splitting in Deutschland - Zeithorizont 2015
Schmitz, K.; Bucksteeg, M.; Weber, C.:
IEWT 2013, 14.02.2013, Wien.
Auswirkungen von fluktuierender Windeinspeisung auf PTDF und ATC - Untersuchung am Beispiel des deutschen Höchstspannungsnetzes mit Zeithorizont 2015
Bucksteeg, M.; Schmitz, K.; Weber, C.:
IEWT 2013, 14.02.2013, Wien.
Market Splitting als Option für Deutschland
Schmitz, K.; Bucksteeg, M.; Weber, C.:
EWorld 2013, 07.02.2013, Essen.
Challenges, Experiences and Possible Solutions in Transmission System Operation with Large Wind Integration
Zongyu, L.; Van der Sluis, L.; Winter, W.; Paeschke, H.; Becker, R.; Weber, C.; Eickmann, J.; Schroeders, C.; Oldewurtel, F.; Roald, F.; Krause, T.; Rogge, M.; Gilsdorf, P.; Wajant, P.:
11th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Power Plants, 14.11.2012, Lissabon, Portugal.
Using Time-Adaptive Probalistic Forecasts for Grid Management - Challenges and Opportunities
Becker, R.; Weber, C.:
31st USAEE/IAEE North American Conference, 06.11.2012, Austin, Texas, USA.
Shale Gas and Photovoltaics – Game Changers at Regional or Global Scale?
Weber, C.:
31st USAEE/IAEE North American Conference, 06.11.2012, Austin, Texas, USA.
Investment decisions in electricity markets from the perspective of control theory
Raasch, J.; Weber, C.:
OR Hannover 2012, 05.09.2012, Hannover.
Renewable support and CO2 abatement in open economies – the role of price discrimination
Weber, C.; Woll, O.; Schober, D.:
IAEE Perth 2012, 24.06.2012, Perth.
Perspectives for Battery Storage Systems in the National Australian Electricity Market
Raasch, J.; Weber, C.; Ziegler, D.:
IAEE Perth 2012, 24.06.2012, Perth.
Die Kosten der Energiewende- Milchmädchenrechnungen, Szenariorechnungen und andere Abschätzungen
Weber, C.:
Atomausstieg jetzt!, 27.04.2012, Ulm.
Kointegration bei europäischen Brennstoff- und Stromterminpreisen
Fritz, A.:
E-World energy&water 2012, 09.02.2012, Essen.
Towards a sustainable building sector - Path-Dependent Developments in the heating market - Posterpräsentation
Bauermann, Klaas:
Associated Poster bei der Sustainable Consumption International Scientific Conference, 01.11.2011, Hamburg.
Smart Grids und Anreizregulierung - Aktuelle Herausforderungen
Weber, C.:
IRIN Abschlusskonferenz, 29.09.2011, Berlin.
Förderung der Erneuerbaren Energien – Marktintegration, Kosteneffizienz und indirekte Effekte
Weber, C.:
4. Eberbacher Klostergespräche zu ökonomischen Grundsatzfragen des Klimawandels, 15.09.2011, Eltville.
Customer driven market potential of heat pumps in private households
Bauermann, Klaas:
European Heat Pump Summit, 01.09.2011, Nürnberg.
European Electricity and Related Futures Markets - A Cointegrated Vector Autoregressive Analysis
Fritz, A.:
4th International Workshop on Empirical Methods in Energy Economics, 14.07.2011, Dallas.
Analysis of the Transferability of PJM’s Market Design to the German Electricity Market
Schmitz, K.; Weber, C.:
IAEE 2011, 21.06.2011, Stockholm.
Reducing Buildings Energy Consumption - Path-Dependent Developments in the Heating Market
Bauermann, Klaas:
34th IAEE International Conference, 01.06.2011, Stockholm, Schweden.
European Electricity and Related Futures Markets - A Cointegrated Vector Autoregressive Analysis
Fritz, A.:
GEE Workshop, 09.05.2011, Essen.
Einsatz der CCS-Technologie in Deutschland unter Berücksichtigung aktueller wirtschaftlicher Rahmenbedingungen
Eickholt, V.; Spiecker, S.; Weber, C.:
7. Internationale Energiewirtschaftstagung, 18.02.2011, Wien.
Die Auswirkungen des Ausbaus erneuerbarer Energien auf den europäischen Kraftwerkspark
Spiecker, S.; Weber, C.:
7. Internationale Energiewirtschaftstagung, 17.02.2011, Wien.
Energieverbrauchsreduktion im Gebäudebereich - Pfadabhängige Entwicklungen im Wärmemarkt
Bauermann, K; Weber C.:
7. Internationale Energiewirtschaftstagung an der TU Wien, 16.02.2011, Wien.
Prognosemodelle für Stromvolatilitäten und Auswirkungen auf die Flexibilitätsbewertung
Fritz, A.; Benatzky, J.; Woll, O.; Weber, C.:
E-World energy & water 2011, 10.02.2011, Essen.
Simulation von Strompreisen und Bewertung von Kraftwerksinvestitionen unter Unsicherheit
Spiecker, S.; Weber, C.:
1. CER.UDE Workshop, 01.02.2011, Duisburg.
Bewertung von Investitionsentscheidungen aus betriebswirtschaftlicher Sicht
Weber, C.:
RWE/enreg.-Symposium , 13.01.2011, Essen.
Integration Erneuerbarer Energien in den Elektrizitätsmarkt - Marktentwicklung und Marktdesign
Weber, C.:
Symposium 20 Jahre IER, 03.12.2010, Stuttgart.
Ermittlung der optimalen Kraftwerksportfolios aus Investorensicht mithilfe der Portfolio-Theorie unter Berücksichtigung der Merit Order
Schmitz, K.; Weber, C.; Ziegler, D.:
9. Workshop of Ph. D. student chapter of GEE, 19.11.2010, Berlin.
Die Rolle des Gebäudesektors für den Klimawandel ‐ Schlüsselfaktoren zur Emissionsreduktion
Bauermann, K.:
1st IRUN Symposium on Urban Systems, 04.11.2010, Essen.
Is there a Rationale for Government Support to Low Carbon Technologies beyond a General Tax or Cap-and-Trade-Regime?
Weber, C.:
29th USAEE/IAEE North American Conference, "Energy and the Environment: Conventional and Unconventional Solutions.", 16.10.2010, Calgary, Canada.
Stationary or Instationary Spreads - Impacts on Optimal Investments in Electricity Generation Portfolios
Schmitz, K.; Ziegler, D.; Weber, C.:
International Conference Operations Research, 01.09.2010, München.
European approach to balancing markets – spotlight on Germany
Spiecker, S.; Weber, C.:
CPI Berlin Workshop, 10.06.2010, Brussels.
Möglichkeiten und Grenzen von Multifaktor-Preismodellen am Beispiel der Ölpreise
Fritz, A.; Weber, C.:
E-World energy & water 2010, 11.02.2010, Essen.
Mean Variance Portfolio Theory and Wind Power Risk
Vogel, P.; Weber, C.:
3rd Transatlantic Infraday Conference on Applied Infrastructure Modeling, 13.11.2009, Washington D.C..
Effects of Load-Flow Based Market Coupling on Wind Power Integration in Europe
Barth, R.; Apfelbeck, J.; Vogel, P.; Meibom, P.; Weber, C.:
8th International Workshop on Large Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Farms, 14.10.2009, Bremen.
Investitionsplanung von Kuppelkapazitäten unter Berücksichtigung des Ausbaus von Windenergie in Europa
Vogel, P.:
ÖGOR Workshop. Mathematische Ökonomie und Optimierung in der Energiewirtschaft, 24.09.2009, Wien.
Efficiency in the Crude Oil Futures Market - Backtesting Recent Developments with Multifactor Models
Fritz, A.; Weber, C.:
IAEE European Conference, 09.09.2009, Wien.
Risk Management in Markets with Limited Liquidity
Fritz, A.; Weber, C.:
IAEE European Conference, 09.09.2009, Wien.
Recombining Scenariotrees for Stochastic Optimization of Decentralized Energy Supply with Wind Energy and storages
Woll, O.:
23rd European Conference on Operational Research, 05.07.2009, Bonn.
Gas Storage Valuation: Comparison of common Valuation Approaches
Bastian, F.:
23rd European Conference on Operational Research, 05.07.2009, Bonn.
Gas Storage Valuation Under Limited Market Liquidity: An Application in Germany
Felix, B.; Woll, O.; Weber, C.:
13th Annual International Real Options Conference, 19.06.2009, Minho.
Investment Planning in a TSO Perspective
Vogel, P.:
Towards an European Electricity Grid, DG-TREN EC Workshop, 02.04.2009, Brüssel.
Konzepte zur Integralen Risikobetrachtung für Energieunternehmen
Fritz, A.; Weber, C.:
E-World energy & water 2009, 12.02.2009, Essen.
Settlement system based analysis of economic CHP potential in Germany
Bauermann, Klaas:
3rd International Conference on Integration of Renewable and Distributed Energy Resources, 01.12.2008, Nizza, Frankreich.
Results of the EWIS Market Modeling
Vogel, P.:
Conference of the European Wind Integration Study (EWIS), 15.10.2008, Fredericia.
Impacts of Liberalized Natural Gas Markets - A Risk Management Perspective
Fritz, A.; Weber, C.:
International Conference Operations Research 2008 , 03.09.2008, Augsburg.
Optimal Hedging Strategies Under Limited Liquidity in Electricity Markets
Woll, O.:
International Conference on Operations Research, 03.09.2008, Augsburg.
Gas storage valuation via Least Squares Monte Carlo Simulation including futures markets
Felix, B.; Weber, C.:
Annual International Conference of the German Operations Research Society (GOR), 03.09.2008, Augsburg.
Decision Problems Including Limited Liquidity in Electricity Markets
Woll, O.; Weber, C.:
International Engineering Management Conference, 30.06.2008, Estoril.
Gas storage valuation: Comparison of recombining trees and Least Squares Monte-Carlo simulation
Felix, B.; Weber, C.:
Engineering Management Conference (IEMC) Europe, 20.06.2008, Estoril.
Efficient Investment Signals for Distributed Generation
Vogel, P.:
31st IAEE International Conference, 18.06.2008, Istanbul.
Decision Support Tools for Large Scale Integration of Wind
Vogel, P.:
DG-TREN EC Workshop on Grid Related FP6 Research Projects, 05.03.2008, Brüssel.
Bewertung von unterschiedlichen Gasspeicherkonfigurationen mittels Verwendung von rekombinierenden Bäumen
Felix, B.; Weber, C.:
VDI Fachtagung Optimierung in der Energiewirtschaft, 27.11.2007, Leverkusen.
Modelling the Impact of Different Permit Allocation Rules on Optimal Power Plant Portfolios
Vogel, P.:
5th Research Workshop Emissions Trading and Business. Gesellschaft für Operations Research (GOR), 07.11.2007, Wittenberg.
Decision Problems Including Limited Liquidity in Electricity Markets
Woll, O.; Weber, C.:
International Conference on Operations Research, 05.09.2007, Saarbrücken.
Natural gas storage valuation: Comparison of Least Square Monte Carlo Simulations with Recombining Trees
Felix, B.; Weber, C.:
, Annual International Conference of the German Operations Research Society (GOR), 05.09.2007, Saarbrücken.
Optimal Investment in Distributed Generation with CHP in Liberalized Energy Markets
Woll, O.:
11th Conference on Stochastic Programming, 31.08.2007, Wien.
The Value of Decentralized Energy Supply and Demand Side Management to the Grid
Weber, C; Vogel, P.:
30th Conference of the International Association for Energy Economics, 18.02.2007, Wellington.
Promotion Policies for Renewables and Rent-Seeking of Interest Groups - Posterpräsentation
Vogel, P.; Weber, C.:
5th Conference on Applied Infrastructure Research (INFRADAY), 07.10.2006, Berlin.
Parametric Programming in the Electricity Market
Woll, O.:
International Conference on Operations Research, 07.09.2006, Karlsruhe.
Valuation of CHP Power Plant Portfolios using Recursive Stochastic Optimisation
Woll, O.:
9th International Conference on probabilistic methods applied to power systems, 13.06.2006, Stockholm.
Optimal Dimensioning of CHP Power Plants in liberalized energy markets
Woll, O.; Weber, C.:
29th IAEE International Conference, 10.06.2006, Potsdam.
Decentralized Energy Production and Electricity Market Structures
Vogel, P.; Weber, C.:
4th Conference on Applied Infrastructure Research, 08.10.2005, Berlin.