Ficara, Elena. “Nichts, Negation, Nihilismus. Die Europäische Moderne als Erkenntnis und Erfahrung des Nichts.” Fenomenologia e società 2 (2009): 153–56.
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Ficara, Elena. “Die Begründung der Philosophie im Deutschen Idealismus.” Rivista di storia della filosofia 2 (2009): 351–53.
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Ficara, Elena. “Hegels Kampfbegriff zwischen Logik und Politik.” In Hegel Jahrbuch, 70–74. Hamburg: Akademie Verlag, 2009.
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Ficara, Elena. Transzendental8 bei Kant und Fichte.” Fichte-Studien, no. 33 (2009): 81395.
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Grote, Tobias, FHeiko Figge, Norbert  Fröhleke, Winfried Beulen, Frank Schafmeister, Peter Ide, and Joachim Böcker. “Semi-Digital Interleaved PFC Control with Optimized Light Load Efficiency.” In Proc. 24th IEEE Applied Power Electronics Conference (APEC), 1722–27. Washington D.C., USA: IEEE, 2009.
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Grote, Tobias, Frank Schafmeister, Heiko Figge, Norbert Fröhleke, Peter Ide, and Joachim Böcker. “Adaptive Digital Slope Compensation for Peak Current Mode Control.” In Proc. IEEE Energy Conversion Congress and Exposition (ECCE), 3523–29. San Jose, CA, USA: IEEE, 2009.
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Schafmeister, Frank, and Johann Kolar. “Verfahren Zur Nutzung Des Ausgangsseitigen Blindstromes Eines Indirekten Dreiphasen-Matrixkonverters Zur Erzeugung von Eingangsblindstrom,” 2009.
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Schneider, T., B. Schulz, C. Henke, K. Witting, D. Steenken, and Joachim Böcker. “Energy Transfer via Linear Doubly-Fed Motor in Different Operating Modes.”https://doi.org/10.1109/iemdc.2009.5075267__In 2009 IEEE International Electric Machines and Drives Conference. IEEE, 2009.https://doi.org/10.1109/iemdc.2009.5075267 .
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DOI: 10.1109/iemdc.2009.5075267

Grotstollen, H. “Optimal Design of Motor and Gear for Drives with High Acceleration and Load Torque.”https://doi.org/10.1109/iemdc.2009.5075352__In 2009 IEEE International Electric Machines and Drives Conference. IEEE, 2009.https://doi.org/10.1109/iemdc.2009.5075352 .
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DOI: 10.1109/iemdc.2009.5075352

Romaus, C., Joachim Böcker, K. Witting, A. Seifried, and O. Znamenshchykov. “Optimal Energy Management for a Hybrid Energy Storage System Combining Batteries and Double Layer Capacitors.”https://doi.org/10.1109/ecce.2009.5316428__In 2009 IEEE Energy Conversion Congress and Exposition. IEEE, 2009.https://doi.org/10.1109/ecce.2009.5316428 .
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DOI: 10.1109/ecce.2009.5316428

Hu, M., N. Fröhleke, and Joachim Böcker. “Small-Signal Model and Control Design of LCC Resonant Converter with a Capacitive Load Applied in Very Low Frequency High Voltage Test System.”https://doi.org/10.1109/ECCE.2009.5316299__In IEEE Energy Conversion Congress and Expo (ECCE), San Jose, USA, 2009, 2009.https://doi.org/10.1109/ECCE.2009.5316299 .
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Cao, Z., N. Fröhleke, and Joachim Böcker. “Control Design for a Very Low-Frequency High-Voltage Test System.”https://doi.org/10.1109/ECCE.2009.5316441__In 13th European Conference on Power Electronics and Applications (E), Barcelona, Spain, 2009.https://doi.org/10.1109/ECCE.2009.5316441 .
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Peters, W., B. Schulz, S. Mathapati, and Joachim Böcker. “Regular-Sampled Current Measurement in AC Drives Using Delta-Sigma Modulators.” In 13th European Conference on Power Electronics and Applications, Barcelona, Spain , 2009.
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Hu, M., Norbert Fröhleke, and Joachim Böcker. “Frequency / Duty Cycle Control of LCC Resonant Converter Supplying High Voltage Very Low Frequency Test Systems.” In 13th European Conference on Power Electronics and Applications (E), Barcelona, Spain, 2009.
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Cao, Z., N. Fröhleke, and Joachim Böcker. “Converter and Control Design for Very Low-Frequency High-Voltage Test Systems.”https://doi.org/10.1109/ECCE.2009.5316441__In IEEE Energy Conversion Congress and Expo (ECCE), San Jose, USA, 2009.https://doi.org/10.1109/ECCE.2009.5316441 .
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Cao, Z., N. Fröhleke, and Joachim Böcker. “Design of a Resonant Converter for Very Low-Frequency High-Voltage Test Systems.” In Proc. of the PCIM China Conference, Shanghai, 2009, 2009.
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Grote, T., Frank Schafmeister, H. Figge, N. Fröhleke, P. Ide, and Joachim Böcker. “Adaptive Digital Slope Compensation for Peak Current Mode Control.”https://doi.org/10.1109/ecce.2009.5316380__In 2009 IEEE Energy Conversion Congress and Exposition. IEEE, 2009.https://doi.org/10.1109/ecce.2009.5316380 .
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DOI: 10.1109/ecce.2009.5316380

Klöpper, Benjamin, Christoph Sondermann-Wölke, Christoph Romaus, and Henner Vöcking. “Probabilistic Planning Integrated in a Multi-Level Dependability Concept for Mechatronic Systems.”https://doi.org/10.1109/cica.2009.4982790__In 2009 IEEE Symposium on Computational Intelligence in Control and Automation. IEEE, 2009.https://doi.org/10.1109/cica.2009.4982790 .
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DOI: 10.1109/cica.2009.4982790

Peckhaus, Volker. “The Mathematical Origins of Nineteenth-Century Algebra of Logic.” In The Development of Modern Logic, edited by Leila Haaparanta, 159–95. Oxford u. a.: Oxford University Press, 2009.
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Peckhaus, Volker. “Leibniz nach der Postmoderne.” Leibniz neu denken, hg. v. Erich Barke/Rolf Wernstedt/Herbert Breger (Studia Leibnitiana; Sonderheft 38), 2009, 97–108.
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