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Your search keyword '"SIEVERS, MICHAEL"' showing total 475 results
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475 results on '"SIEVERS, MICHAEL"'

1. Roles of the Red List of Ecosystems in the Kunming-Montreal Global Biodiversity Framework

Author

Nicholson, Emily, Andrade, Angela, Brooks, Thomas M., Driver, Amanda, Ferrer-Paris, José R., Grantham, Hedley, Gudka, Mishal, Keith, David A., Kontula, Tytti, Lindgaard, Arild, Londono-Murcia, Maria Cecilia, Murray, Nicholas, Raunio, Anne, Rowland, Jessica A., Sievers, Michael, Skowno, Andrew L., Stevenson, Simone L., Valderrabano, Marcos, Vernon, Clare M., Zager, Irene, and Obura, David

Published
2024
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2. Enabling conservation theories of change

Author

Buelow, Christina A., Connolly, Rod M., Dunic, Jillian C., Griffiths, Laura, Holgate, Briana, Lee, Shing Yip, Mackey, Brendan G., Maxwell, Paul S., Pearson, Ryan M., Rajkaran, Anusha, Sievers, Michael, Sousa, Ana I., Tulloch, Vivitskaia J. D., Turschwell, Mischa P., Villarreal-Rosas, Jaramar, and Brown, Christopher J.

Published
2024
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6. MBSE Mission Assurance

Author

Fant, J. S., Pettit, R. G., Minnichelli, Robert J., Section editor, Noguchi, Ryan A., Section editor, Sievers, Michael W., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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7. Model Interoperability

Author

Weilkiens, Tim, Minnichelli, Robert J., Section editor, Noguchi, Ryan A., Section editor, Sievers, Michael W., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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9. Semantic Modeling for Power Management Using CAESAR

Author

Wagner, D. A., Chodas, M., Elaasar, M., Jenkins, J. S., Rouquette, N., Erwin, Dan A., Section editor, Salado, Alejandro, Section editor, Sievers, Michael W., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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10. Toward an Engineering 3.0

Author

Augustine, Norman, Madni, Azad M., Section editor, Sievers, Michael W., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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12. Ontological Metamodeling and Analysis Using openCAESAR

Author

Wagner, D. A., Chodas, M., Elaasar, M., Jenkins, J. S., Rouquette, N., Erwin, Dan A., Section editor, Salado, Alejandro, Section editor, Sievers, Michael W., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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16. MBSE for System-of-Systems

Author

DeLaurentis, Daniel, Raz, Ali, Guariniello, Cesare, Erwin, Dan A., Section editor, Salado, Alejandro, Section editor, Sievers, Michael W., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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28. Model-Based Requirements

Author

Salado, Alejandro, Sievers, Michael, Section editor, Estefan, Jeff A., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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30. Pattern-Based Methods and MBSE

Author

Schindel, William D., Madni, Azad M., Section editor, Sievers, Michael W., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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31. SysML State of the Art

Author

Bagdatli, B., Cimtalay, S., Fields, T., Garcia, E., Peak, R., Madni, Azad M., Section editor, Sievers, Michael, Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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32. MBSE Methodologies

Author

Estefan, Jeff A., Weilkiens, Tim, Madni, Azad M., Section editor, Sievers, Michael W., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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34. Role of Decision Analysis in MBSE

Author

Parnell, Gregory S., Shallcross, Nicholas J., Specking, Eric A., Pohl, Edward A., Phillips, Matt, Madni, Azad M., Section editor, Sievers, Michael W., Section editor, Madni, Azad M., editor, Augustine, Norman, editor, and Sievers, Michael, editor

Published
2023
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36. Convergence Analysis of a Local Stationarity Scheme for Rate-Independent Systems and Application to Damage

Author

Sievers, Michael

Subjects
Mathematics - Numerical Analysis, Mathematics - Analysis of PDEs, 65J08, 65J15, 65M60, 74H15, 74R05
Abstract

This paper is concerned with an approximation scheme for rate-independent systems governed by a non-smooth dissipation and a possibly non-convex energy functional. The scheme is based on the local minimization scheme introduced in [EM06], but relies on local stationarity of the underlying minimization problem. Under the assumption of Mosco-convergence for the dissipation functional, we show that accumulation points exist and are so-called parametrized solutions of the rate-independent system. In particular, this guarantees the existence of parametrized solutions for a rather general setting. Afterwards, we apply the scheme to a model for the evolution of damage.

Published
2021

37. Co-occurrence of biodiversity, carbon storage, coastal protection, and fish and invertebrate production to inform global mangrove conservation planning

Author

Sievers, Michael, Brown, Christopher J., McGowan, Jennifer, Turschwell, Mischa P., Buelow, Christina A., Holgate, Briana, Pearson, Ryan M., Adame, Maria F., Andradi-Brown, Dominic A., Arnell, Andy, Mackey, Brendan G., Ermgassen, Philine S.E. zu, Gosling, Joe, McOwen, Chris J., Worthington, Thomas A., and Connolly, Rod M.

Published
2023
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39. A-priori error analysis of local incremental minimization schemes for rate-independent evolutions

Author

Meyer, Christian and Sievers, Michael

Subjects
Mathematics - Numerical Analysis, 65J08, 65K15, 65M15, 74C05, 74H15
Abstract

This paper is concerned with a priori error estimates for the local incremental minimization scheme, which is an implicit time discretization method for the approximation of rate-independent systems with non-convex energies. We first show by means of a counterexample that one cannot expect global convergence of the scheme without any further assumptions on the energy. For the class of uniformly convex energies, we derive error estimates of optimal order, provided that the Lipschitz constant of the load is sufficiently small. Afterwards, we extend this result to the case of an energy, which is only locally uniformly convex in a neighborhood of a given solution trajectory. For the latter case, the local incremental minimization scheme turns out to be superior compared to its global counterpart, as a numerical example demonstrates.

Published
2019
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41. Rate-Independent Systems and Their Viscous Regularizations: Analysis, Simulation, and Optimal Control

Author

Herzog, Roland, Knees, Dorothee, Meyer, Christian, Sievers, Michael, Stötzner, Ailyn, Thomas, Stephanie, Hintermüller, Michael, Series Editor, Leugering, Günter, Series Editor, Chen, Zhiming, Associate Editor, Hoppe, Ronald H.W., Associate Editor, Kenmochi, Nobuyuki, Associate Editor, Starovoitov, Victor, Associate Editor, Hoffmann, Karl-Heinz, Honorary Editor, Herzog, Roland, editor, Kanzow, Christian, editor, Ulbrich, Michael, editor, and Ulbrich, Stefan, editor

Published
2022
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45. Investigation of Biofilm Formation on Air Cathodes with Quaternary Ammonium Compounds in Microbial Fuel Cells.

Author

Landwehr, Laura, Haupt, Dennis R., Sievers, Michael, and Kunz, Ulrich

Subjects
QUATERNARY ammonium compounds, MICROBIAL fuel cells, BIOFILMS, CATHODES, POWER density, AMMONIUM compounds
Abstract

The use of gas diffusion electrodes (GDEs) in microbial fuel cells (MFCs) can improve their cell performance, but tends to cause fouling. In order to allow long-term stable operation, the search for antifouling methods is necessary. Therefore, an antibacterial coating with ammonium compounds is investigated. Within the first 30 days of operation, the maximum measured power density of a GDE with antibacterial ionomer was 606 mW m−2. The GDE without an antifouling treatment could only reach a maximum of 284 mW m−2. Furthermore, there was an optimum in the loading amount with ionomer below 2.6 mg cm−2. Further investigations showed that additional aeration of the GDEs by a fan had a negative effect on their performance. Despite the higher performance, the antibacterial coating could not prevent biofilm growth at the surface of the GDE. The thickness of the biofilm was only reduced by 14–16%. However, the weight of the biofilm on the treated GDEs was 62–80% less than on a GDE without an antifouling treatment. Consequently, the coating cannot completely prevent fouling, but possibly leads to a lower density of the biofilm or prevents clogging of the pores inside the electrodes and improves their long-term stability. [ABSTRACT FROM AUTHOR]

Published
2024
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