Multi-technology platform for hybrid metal processing (2008)
Brecher, C., Hoffmann, F., Karlberger, A., Rosen, C.J.
This paper presents concepts for the integration of laser processing and milling in a hybrid machining platform. Based on the analysis of requirements for an individualized production technology in...
Brecher, C., Breitbach, T., Hoffmann, F., Karlberger, A., Do-Khac, D., Rosen, C.J.
Insbesondere in Hochlohnländern müssen Werkzeugmaschinen gleichzeitig immer leistungsfähiger und flexibler werden. An der RWTH Aachen wird deshalb gegenwärtig das Konzept einer hybriden...
Preparations of BESSY for Top Up Operation. 2008-06-23 - 2008-06-27 (2008)
P. Kuske, DESY Maschinenphysik, M. Abo-Bakr, W. Anders, T. Birke, ...
Contribution to a conf. proceeding (book/online)
Wintergerst, U., Hoffmann, F., Jansson, A., Notheis, G., Huß, K., Kurowski, M., ...
Objectives To obtain data on the pharmacokinetics of efavirenz in children in clinical practice. Methods HIV-1-infected children received efavirenz capsules or tablets in accordance with...
Die vorliegende Arbeit zeigt die Entwicklung und Umsetzung des APm (Advanced Pore Morphology) Technologiekonzepts zur Herstellung von Aluminiumschaumbauteilen. Diese werden aus einer Vielzahl...
Großmann, K., Rudolph, H., Brecher, C., Hoffmann, F.
Im Rahmen der Maschinenentwicklung kann mit den üblichen Simulationsmethoden das dynamische Verhalten von Werkzeugmaschinen mit lagegeregelten Vorschubachsen nur für eine vordefinierte Achsposition...
Oxygen dynamics in choanosomal sponge explants (2005)
Hoffmann, F., Larsen, O., Rapp, H.T., Osinga, R.
Oxygen microprofiles were measured over the boundary layer and into the tissue of 10-day-old cultivated tissue fragments (explants of 2-4 cm 3) from the choanosome of the cold-water sponge Geodia...
Comparing a genetic fuzzy and a neurofuzzy classifier for credit scoring (2002)
Hoffmann, F, Baesens, Bart; U0004667, Martens, J, Put, Ferdinand; U0003768, Vanthienen, Jan; U0017013
In this paper, we evaluate and contrast two types of fuzzy classifiers for credit scoring. The first classifier uses evolutionary optimization and boosting for learning fuzzy classification rules....
Ten Years of Genetic Fuzzy Systems: Current Framework and New Trends (2001)
O. Cordon, F. Herrera, F. Gomide, F. Hoffmann, L. Magdalena
Although fuzzy systems demonstrated their ability to solve different kinds of problems in various applications, there is an increasing interest on augmenting them with learning capabilities. Two of...
Path planning and flight controller scheduling for an autonomous helicopter (1999)
M. Egerstedt, T. J. Koo, F. Hoffmann, S. Sastry
Abstract. In this article we investigate how to generate flight trajectories for an autonomous helicopter. The planning strategy that we propose reflects the controller architecture. It is reasonable...
Path Planning and Flight Controller Scheduling for an Autonomous Helicopter (1999)
Egerstedt Koo, T. J. Koo, F. Hoffmann, S. Sastry
. In this article we investigate how to generate flight trajectories for an autonomous helicopter. The planning strategy that we propose reflects the controller architecture. It is reasonable to...
Path Planning and Flight Controller Scheduling for an Autonomous Helicopter (1999)
M. Egerstedt, T. J. Koo, F. Hoffmann, S. Sastry
. In this article we investigate how to generate flight trajectories for an autonomous helicopter. The planning strategy that we propose reflects the controller architecture. It is reasonable to...
A Comprehensive Study of Control Design for an Autonomous Helicopter (1998)
H. Shim, T. J. Koo, F. Hoffmann, S. Sastry
In this paper, we compare three different control methodologies for helicopter autopilot design: linear robust multi-variable control, fuzzy logic control with evolutionary tuning, and nonlinear...
Hierarchical Hybrid System Design on Berkeley UAV (1998)
Koo Shim, T. J. Koo, D. H. Shim, O. Shakernia, B. Sinopoli, F. Hoffmann, ...
This paper describes recent results on system design and implementation of Berkeley UAV. The system design deploys the architecture of a Flight Vehicle Management System, FVMS, which combines...
Hybrid Control of an Autonomous Helicopter (1998)
T. J. Koo, F. Hoffmann, F. Ho Mann, H. Shim, B. Sinopoli, S. Sastry
This paper proposes a hierarchical hybrid architecture of a reactive system that governs the operation of a helicopter based UAV. The mission of the helicopter is to search for, investigate and...
Hierarchical Hybrid System Design on Berkeley UAV (1998)
T. J. Koo, D. H. Shim, O. Shakernia, B. Sinopoli, F. Hoffmann, S. Sastry
This paper describes recent results on system design and implementation of Berkeley UAV. The system design deploys the architecture of a Flight Vehicle Management System, FVMS, which combines...
Recent Results from the Tcv Tokamak (1995)
Weisen, H., Hoffmann, F., Dutch, M. J., Moret, J. M., Lister, J. B., Pochelon, A., ...
During the first two years of operation, the TCV tokamak has produced a large variety of plasma shapes and magnetic configurations, with 1.0 less than or equal to B-tor less than or equal to 1.46T,...
Laborquelle fuer Linenstrahlung bis 3 keV. (1992)
Fruehjahrstagung der DPG der Fachgremien Atomphysik, Kurzzeitphysik, Massenspektrometrie, Molekuelphysik, Plasmaphysik, Quantenoptik, gemeinsam mit der Oesterreichischen Physikalischen Gesellschaft,...
Fruehjahrstagung der DPG der Fachgremien Atomphysik, Kurzzeitphysik, Massenspektrometrie, Molekuelphysik, Plasmaphysik, Quantenoptik, gemeinsam mit der Oesterreichischen Physikalischen Gesellschaft,...
Der Kanalfunke als Quelle fuer gepulste Elektronenstrahlen und weiche Roentgenstrahlung. (1992)
Hoffmann, F., Konijnenberg, M., Schutlheiss, C., Schwall, M., Mittag, K., Mueller, G.
KfK-Nachrichten, 24(1992) S.254
Statusbericht zur Erzeugung weicher Roentgenstrahlung aus Pseudofunken-Entladungen. (1991)
Fruehjahrstagung DPG, Kurzzeitphysik, Plasmaphysik, Kiel, 12.-14.Maerz 1991
Pseudofunken-initiierte z-Pinch-Entladung zur Erzeugung weicher Roentgenstrahlung (+ XUV). (1991)
Plasmakolloquium des Instituts fuer Plasmaforschung, Universitaet Stuttgart, 14.November 1991
54.Physikertagung gemeinsam mit der Fruehjahrstagung DPG, Atomphysik, Energietechnik - Physikalische Grundlagen, Extraterrestrische Physik, Gravitation und Relativitaetstheorie, Kurzzeitphysik,...
Generation of #ms-stable Z-pinches at a temperature in the order of 200 eV. (1990)
Conf.on Plasma Science, Oakland, Calif., May 21-23, 1990
Observation of directed bremsstrahlung from a hollow cathode plasma. (1990)
Nuclear Instruments and Methods B, 51(1990) S.187-91
Fruehjahrstagung DPG, Kurzzeitphysik, Massenspektrometrie, Molekuelphysik, Plasmaphysik, Quantenoptik, Physikausstellung, Essen, 6.-10.Maerz 1989
The X-ray emission of the high power pseudo spark. (1989)
Bauer, W., Hoffmann, F., Jung, G., Rogner, A., Schultheiss, C.
Workshop on Transient Hollow Cathode Discharge Phenomena, Paris, F, September 11-12, 1989
Review on effects of the high power pseudo spark. (1988)
Bauer, W., Ehrler, H., Hoffmann, F., Mittag, K., Niessen, W., Rogner, A., ...
Bauer, W. [Hrsg.]
X-ray emission of the pseudo spark. (1988)
Hoffmann, F., Jung, G., Rogner, A., Schultheiss, Chr., Kitamura, A., Citron, A.
Bauer, W. [Hrsg.]