PD Dr. Jürgen Jakumeit
(Physicist, MBA)


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Publications


Reviewed Publications

J. Jakumeit, E. Subasic and M. Bünck, Prediction of Misruns in Thin Wall Castings Using Computational Simulation , Shape Casting: 5th International Symposium 2014, ISBN: 978-1-118-88818-6

S. Jana, J. Jakumeit, R. Tiefers and T. Stoyanov, Simulation of Cold Shuts and Misruns in Centrifugal Casting of TiAl Low Pressure Turbine Blades, Proceedings of LMT-2013, Materials Science Forum 765 2013, pp 155-159

E. Subasic R. Laqua, S. Jana, H. Behnken, J. Jakumeit, F. Hediger, Application of moving meshes in numerical simulation of casting processes with STAR-Cast, Proceedings of the 52nd International Foundry Conference Portoroz 2012, ISBN: 978-961-90130-7-6

J. Jakumeit, S. Jana, T. Waclawczyk, A. Mehdizadeh, A. Sadiki, M.Y. Jouani, Four-phase fully-coupled mold-filling and solidification simulation for gas porosity prediction in aluminum sand casting, MCSWASP XIII: International Conference on Modeling of Casting, Welding and Advanced Solidification Processes June 2012, Schladming,Austria. IOP Conference Series : Materials Science and Eng. 33,1 ISSN: 1757-8981

S. Jana, O. Kaettlitz, F. Hediger, J. Jakumeit, J. Aguilar, Predictions of misruns using three-phase coupled mold-filling and solidification simulations in low pressure turbine (LPT) blades , 13th International Conference on Modeling of Casting, Welding and Advanced Solidification Processes (MCWASP) Schladming, Austria, Jun 2012. IOP conference series / Materials science and eng. 33. - ISSN: 1757-8981

J. Jakumeit, S. Jana, B. Böttger, R. Laqua, M. Y. Jouani, A. Bührig-Polaczek Simulation-based prediction of micro-shrinkage porosity in aluminum casting Fully-coupled numerical calculation vs. criteria functions IOP Conf. Ser. Mater. Sci. Eng. 27 012066, 2012

S. Jana, J. Jakumeit, M. Y. Jouani Numerical Predictions of Gas Porosity in Casting Processes using Fully Coupled Mold-filling and Solidification Simulation. Proceedings of the XII conference on Modelling of Casting, Welding and Advanced Solidification processes , Vancouver 2009

J. Jakumeit, K. Goodheart, M. Albers Influence of the Gas Phase on Mold Filling for Sand Casting. Proceedings of the XII conference on Modelling of Casting, Welding and Advanced Solidification processes , Vancouver, 2009

J. Jakumeit, R. Laqua, U. Hecht, K. Goodheart, M. Peric Coupled mould filling and solidification simulation applied to centrifugal casting of TiAl parts Proceedings of the 5th Decennial International Conference on Solidification Processing SP07 (Sheffield, 23-25 July, 2007), pp. 292-296

J. Jakumeit, T. Barth, M. Grauer, J. Reichwald, M. Smith, K. Dörnemann, B. Freisleben Grid based numerical optimization of casting processes Proceedings of the 5th Decennial International Conference on Solidification Processing SP07 (Sheffield, 23-25 July, 2007), pp. 488-492

T. Barth, K. Dörnemann, T. Dörnemann, B. Freisleben, T. Friese, M. Grauer, J. Jakumeit, C. Lütke Entrup, J. Reichwald, C. Schridde, M. Smith, F. Thilo Supporting engineering processes utilizing service-oriented grid technology Proceedings of the German e-Science Conference 2007, Baden-Baden, pp. 1-10 (angenommener Beitrag zur German EScience Conference (GES) 2007, 2.-4.5.2007 in Baden Baden.)

J. Jakumeit Grid-basierte Simulation für die Gießerei-Industrie Grid Computing, ed. by T. Barth [et. al.], Wiesbaden : Vieweg, 2006, S. 133-142 J. Jakumeit, T. Barth, J. Reichwald, M. Grauer, F. Thilo, T. Friese, M. Smith, B. Freisleben A grid-based parallel otimization algorithm applied to a problem in metal casting industry International Conference on Bioinspired Optimization Methods and their Applications, BIOMA '06, Ljubljana, Slovenia, 2006, pp. 131-146

J. Jakumeit, R. Laqua, M. Peric, E. Schreck Fully coupled multi-phase mold-filling and solidification simulation of industrial casting processes Modeling of Casting, Welding and Advanced Solidification Processes XI. Ed. by C.-A. Gandin (et. al.), TMS: Warrendale, 2006, pp. 63-70

J. Jakumeit, M. Emmerich, F. Hediger Inverse modeling and numerical optimization of heater temperatures in a bridgman process Modeling of Casting, Welding and Advanced Solidification Processes XI. Ed. by C.-A. Gandin (et. al.), TMS: Warrendale, 2006, pp. 1019-1026

J. Jakumeit, T. Barth, M. Grauer, J. Reichwald Grid computing for casting simulations Modeling of Casting, Welding and Advanced Solidification Processes XI. Ed. by C.-A. Gandin (et. al.), TMS: Warrendale, 2006, pp. 1157-1162

J. Jakumeit, M. Herdy, M. Nitsche Parameter optimization of the sheet metal forming press using an iterative parallel Kriging algorithm Structural and multidisciplinary optimization 28 (2004), pp. 1-10

J. Jakumeit, M. Emmerich Optimization of gas turbine blade castings using evolution strategies and Kriging International Conference on Bioinspired Optimization Methods and their Applications, BIOMA '04, Ljubljana, Slovenia, 2004, pp. 95-104

R. Laqua, T. Ivas, J. Scheele, J. Jakumeit, M. Braun, M. Pelzer Mold filling and solidification simulations of investment casting processes using CASTS-FLUENT Eurotherm 69, Heat and Mass Transfer in Solid-Liquid Phase Change Processes, June 25-27, 2003, Ljubljana, Slovenia, pp. 133-141

J. Jakumeit, R. Laqua, T. Ivas, J. Scheele, M. Braun, A. Mukhopadhyay, M. Pelzer Multidisciplinary coupled simulations of investment casting processes using CASTS-FLUENT Materials Science & Technology 2003, November 9 - 12, 2003, Chicago, Illinois, Session: Modeling,Control and Optimization in Nonferrous and Ferrous Industry, pp. 333-342

T. Mietzner, J. Jakumeit, U. Ravaioli, Local Iterative Monte Carlo analysis of electron-electron interaction in short-channel Si-MOSFETs, IEEE Trans. Electron Devices, 48, 2001, S. 2323

J. Jakumeit, U. Ravaioli, Semiconductor transport simulation with the Local Iterative Monte Carlo Technique, IEEE Trans. Electron Devices, 48, 2001, S. 946

J. Jakumeit, U. Ravaioli, Influence of electron-electron scattering on the hot electron distribution in ultra-short Si-MOSFETs , 12th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS-12), Santa Fe, 2001, accepted for Physica B

T. Mietzner, J. Jakumeit, U. Ravaioli, Effects of electron-electron interaction on electron distributions in short Si-MOSFETs, 7th International Workshop on Computational Electronics, Glasgow, 2000, accepted for VLSI DESIGN

J. Jakumeit, T. Mietzner, U. Ravaioli, Efficient silicon device simulation with the Local Iterative Monte Carlo method, 7th International Workshop on Computational Electronics Glasgow 2000, accepted by VLSI DESIGN

J. Jakumeit, Computational Aspects of the Local Iterative Monte Carlo Technique, Int. J. Mod. Phys. C, 11, 2000, S. 665

J. Jakumeit, T. Sontowski, U. Ravaioli, Iterative Local Monte Carlo TEchnique for the Simulation of Si-MOSFETs, Proceedings of the 6th International Workshop on Computational Electronics, Osaka, 1998

M. Hauke, J. Jakumeit, B. Krafft, G. Nimtz, A. Förster, H. Lüth, Dx centers in
Al0.3Ga0.7 As/GaAs analysed by point contact measurement
, J. Appl. Phys. 84, 1998, S. 2034

A. Duncan, U. Ravaioli, J. Jakumeit, Full-Band Monte Carlo Investigation of Hot Carrier Trends in the Scaling of Metal-Ocide-Semiconductor Field-Effect Transistors, IEEE Trans. Electron Devices, 45, 1998, S. 867

J. Jakumeit, A. Duncan, U. Ravaioli, K. Hess, Simulation of Si-MOSFETs with the Mutation Operator Monte Carlo Method, 5th International Workshop on Computational Electronics (Notre Dame 1997), VLSI DESIGN 8, 1998, S. 343

J. Jakumeit, U. Ravaioli, K. Hess, New approach to hot electron effects in Si-MOSFETs based on an evolutionary algorithm using a Monte Carlo like mutation operator, 4th International Workshop on Computational Electronics (Tempe 1995), VLSI-Design 6, 1998, S. 307

J. Ren, G. Nimtz, J. Jakumeit, R, Wollrab, Carrier Freezeout in n-on-p Hg0.7Cd0.3Te photodiode and acceptor level determination,

J. Jakumeit, A. Duncan, U. Ravaioli, K. Hess, Calculation of the high energy tail of the distribution in Si MOSFETs with an evolutionary algorithm, 10th International Conference on Nonequilibrium Carriers in Semiconductors (HCIS X), Berlin, 1997, Physica Status solidi b 204, 1997, S. 517

J. Jakumeit, Evolutionary algorithms for the calculation of electron distributions in Si-MOSFETs, IV. International Conference on Parallel Problem Solving from Nature (Berlin 1996), Lecture Notes in Computer Science 1141, Springer Verlag, 1996, S. 819 Appl. Phys. A 65, 1997, S. 325

J. Jakumeit, U. Ravaioli, K. Hess, Calculations of hot electron distributions in silicon by means of an evolutionary algorithm, J. Appl. Phys. 80, 1996, S. 5061

J. Jakumeit, Genetic algorithms: a new approach to energy balance equations, Appl. Phys. Letters 66, 1995, S. 1812

J. Jakumeit, Elektroneninterferenzeffekte und Energierelaxation in HgCdTe, Doktorarbeit an der Universität Köln, Shaker Verlag Aachen, 1994

J. Jakumeit, M. Tutt, D. Pavlidis, Quantum State Transfer In Double Quantum-Well Devices, J. Appl. Phys. 76, 1994, 7428

J. Jakumeit, J. P. Rakotoniaina, G. Nimtz, Electron Transport Analysed by Genetic Algorithms, Proceedings of the 22st International Conference on the Physics of Semiconductors, Vancouver, USA (1994),

J. X. Huang, G. Barut, J. Lange, Electron Traps in Wide-Gap n- Hg0.3Cd0.7Te Charakterized by Time-Resolved Photoconductivity, Appl. Phys. A 57, 1993, 427

J. Lange, H. Spieker, J. X. Huang, G. Nimtz, L. Mester, Temperature induced double dimensional crossovers in bulk Hg0.8Cd0.2Te , Proceedings of the 21st International Conference on the Physics of Semiconductors, Beijing, China 1992, S. 1499

G. Nimtz, J. X. Huang, J. Lange, L. Mester, H. Spieker, Electron wave interference effects in CMT and quantum-size devices, Semicond. Sci. Technol. 6, 1991, C130

J. X. Huang, J. Lange, G. Nimtz, H. Spieker, M. Mester, Double Dimensional Crossovers of Nonclassical Conductivity, Phys. Rev. Lett. 67, 1991, S. 2705

J. Schilz, J. Lange, L. Mester, G. Nimtz, Nonclassical Conductivity in a Bulk Semiconductor up to 35 K, Z. Physik B 81, 1990, S. 381


Not reviewed conference contributions

J. Jakumeit, J. Eiken, J. Reichwald , T. Barth and M. Grauer, Multi-Scale Solidification Process Simulation using Grid Technology , Internatioal Conference on Applied Solidification Processes 2, Graz, 2010

K. Goodheart, M. Peric and J. Jakumeit, Simulation of gas pressure in sand molds , Internatioal Conference on Applied Solidification Processes 2, Graz, 2010

T. Barth, K. Dörnemann, T. Dörnemann, B. Freisleben, T. Friese, M. Grauer, J. Jakumeit, C. Lütke Entrup, J. Reichwald, C. Schridde, M. Smith, F. Thilo, Supporting engineering processes utilizing service-oriented grid technology, Proceedings of the German e-Science Conference 2007, Baden-Baden, pp. 1-10

J. Jakumeit, U. Ravaioli, Local Iterative Monte Carlo investigation of the influence of electron-electron scattering on short channel Si-MOSFETs, Proceedings of the International Conference on Simulation of Semiconductor Processes and Devices (SISPAD) in Athens, Greece, 2001
in Simulation of Semiconductor PRocesses and Devices , D.~Tsoukalas, C.~Tsamis editors, Springer, Wien, 2001, S. 38

J. Jakumeit, Simulation of electron-electron scattering in semiconductor devices by the local iterative Monte Carlo technique , Proceedings of the europhysics conference on computational physics, Aachen, Germany, 2001

J. Jakumeit, Bestimmung der energetischen Verteilung hei"ser Ladungsträger in HgCdTe mit Hilfe Genetischer Algorithmen, 59. Physikertagung der DPG, Berlin, 1995

J. Ren, R. Wollrab, J. Jakumeit, G. Nimtz, Hg1-xCdxTe (x=0.2) Infrarot-Heterodyn-Empfänger, 59. Physikertagung der DPG, Berlin, 1995

B. Krafft, J. Jakumeit, G. Nimtz, H. Lüth, Punktkontakte in AlGaAs/GaAs-Heterostrukturen als Photodetektoren 59. Physikertagung der DPG, Berlin, 1995

J. X. Huang, G. Barut, J. Lange, G. Nimtz, Electron Traps in Wide-Gap n- Hg0.3Cd0.7Te Charakterized by Time-Resolved Photoconductivity, 13th General Conference of the Condensed Matter Division European Physical Society, Regensburg, Germany, 1993

J. Lange, M. Tutt, D. Pavlidis, Hei"se Ladungsträger in Double-Quantum-Well Strukturen, Frühjahrstagung des Arbeitskreis Festkörperphysik der DPG Regensburg 1992, Regensburg, Germany, 1992

J. X. Huang, J. Lange, L. Mester, G. Nimtz, H. Spieker , Zweifacher Dimensionalitätsübergang der nicht-klassischen Leitfähigkeit in n- Hg0.8Cd0.2Te , Frühjahrstagung des Arbeitskreis Festkörperphysik der DPG Regensburg 1992, Regensburg, Germany, 1992

J. Lange, J. X. Huang, H. Spieker, G. Nimtz, L. Mester, Double Dimensional Crossovers in CMT-micrometer Structures 22. IR-Kolloquium im Fraunhofer-Institut für Angewandte Festkörperphysik, Freiburg, Germany, 1992

J. Lange, J. Schilz, J. X. Huang, G. Nimtz, L. Mester, D. Chattopadhyay, Electron-Electron Interaction: A New Possibility to Determin $\tau_{e}$, 55. Physikertagung Münster, Münster, Germany, 1991

G. Galeczki, J. Lange, G. Nimtz, 4-Punkt Magnetowiderstands-Plateaus "`dünner"' HgCdTe-Proben, 55. Physikertagung Münster, Münster, Germany, 1991

J. Schilz, J. Lange, L. Mester, G. Nimtz, Nicht klassische Leitfähigkeit in
Hg0.8Cd0.2Te
, 55. Physikertagung Münster, Münster, Germany, 1991

J. Schilz, J. Lange, G. Nimtz, G. Galeczki, Influence of Quantum Effects on Photoconductor Properties, Conference on Solid State Devices and Materials, Sendai, Japan, 1990


Talks

Multiscale Casting Simulation using STAR-Cast/MICRES, CD-adapco User Conference, Wien 2014

Realitätsnahe Gießsimulation führt zum Erfolg, Access-Beirat, 2013

The effect of the uncertainties of physical parameters on the numerical simulation of casting and solidification processes, DLR-Kolloquium, 2013

Analyse formfü&llungsbedingter Gussfehler mittels gekoppelter Dreiphasen-Gießsimulation, BDG-FA Leichtmetallguss, 2012

Industrial Casting applications with STAR-Cast, CD-adapco User Conference, Amsterdam, 2011

STAR-Cast: Industrial Casting applications, CD-adapco User Conference, London, 2010

Gas, Schmelze, Erstarrtes: Beispiele aus der Praxis mit innovativer Dreiphasen-Gießsimulation , Gie├čereikolloquium, RWTH-Aachen, 2009

STAR-Cast: Produktoverview with industrial Examples, CD-adapco User Conference 2009

Moderne Verfahren zur Simulation des Ladungstransportes in Halbleitern, Forschungsseminar Wissenschaftliches Rechnen, Institut für Algorithmen und wissenschaftliches Rechnen, GMD-Deutsches Forschungszentrum Informationstechnologie, 1999

Mutation Operator Monte Carlo Simulation of Si-MOSFETs, Seminar des Instituts für Integrierte Systeme, ETH Zürich, 1998

Berechnung der Elektronenverteilung in Si-MOSFETs mittels Optimierung und Monte Carlo Verfahren, Seminar am Institut für Theoretische Elektrotechnik und Mikroelektronik, Universität Bremen, 1998

Calculation of the high energy tail of the electron distribution in Si-MOSFETs with an evolutionary algorithm, ETH Zürich, 1997

Berechnung der Elektronenverteilung in Si-MOSFETs mit evolutionären Algorithmen, Mikroelektronik-Kolloquium, Lehrstuhl Bauelemente der Elektrotechnik, Universität Dortmund, 1996

Berechnung der Elektronenverteilung in Si-MOSFETs mit evolutionären Algorithmen, Seminar: Anwendung des genetischen Programmierens und von Artifical Life, Universität Dortmund, 1996

Evolutionäre Algorithmen zur Berechnung der Verteilung hei"ser Elektronen in Si-MOSFETs, Seminar des Instituts für Schicht und Ionentechnik, Forschungszentrum Jülich, 1996