TY  - GEN
A1  - Braun, Lena
A1  - Krafft, Simone
A1  - Tippkötter, Nils
T1  - Combined supercritical carbon dioxide extraction and chromatography of the algae fatty linoleic and linolenic acid
T2  - Chemie Ingenieur Technik
N2  - A method for the integrated extraction and separation of fatty acids from algae using supercritical CO2 is presented. Desmodesmus obliquus and Chlorella sorokiniana were used as algae. First, a method for chromatographic separation of fatty acids of different degrees of saturation was established and optimized. Then, an integrated method for supercritical extraction was developed for both algal species. It was also verified whether prior cell disruption was beneficial for extraction. In developing the method for chromatographic separation, statistical experimental design was used to determine the optimal parameter settings. The methanol content in the mobile phase proved to be the most important parameter for successful separation of the three unsaturated fatty acids oleic acid, linoleic acid, and linolenic acid. Supercritical extraction with dried algae showed that about four times more fatty acids can be extracted from C. sorokiniana relative to the dry mass used.
Y1  - 2022
U6  - https://doi.org/10.1002/cite.202255308
SN  - 0009-286X
SN  - 1522-2640 (eISSN)
N1  - ProcessNet and DECHEMA‐BioTechNet Jahrestagungen 2022 together with 13th ESBES Symposium 2022, 12. - 15. September 2022, Eurogress Aachen
VL  - 94
IS  - 9
SP  - 1304
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - CHAP
A1  - Braun, Carsten
A1  - Boucke, Alexander
A1  - Hanke, M.
A1  - Karavas, Alexandros
A1  - Ballmann, Josef
T1  - Prediction of the model deformation of a high speed transport aircraft type wing by direct aeroelastic simulation
T2  - High performance computing in science and engineering '03. Transactions of the High Performance Computing Center Stuttgart (HLRS) 2003 /  Eds.: Egon Krause ...
Y1  - 2003
SN  - 978-3-540-40850-5
SP  - 331
EP  - 342
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Braun, Carsten
A1  - Boucke, Alexander
A1  - Ballmann, Josef
T1  - Numerical study of the influence of dynamic pressure and deflected ailerons on the deformation of a high speed wing model
T2  - High performance computing in science and engineering '04. Transactions of the High Performance Computing Center Stuttgart (HLRS) 2004 /  Eds.: Egon Krause ...
Y1  - 2005
SN  - 3-540-22943-4
SP  - 225
EP  - 236
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Braun, Carsten
A1  - Boucke, Alexander
A1  - Ballmann, Josef
T1  - Numerical prediction of the wing deformation of a high speed transport aircraft type wind tunnel model by direct aeroelastic simulation
T2  - Conference proceedings : CEAS/AIAA/DGLR International Forum on Aeroelasticity and Structural Dynamics IFASD 2005 : München, June 28 - July 1, 2005. DGLR-Bericht. 2005,04
Y1  - 2005
SN  - 3-932182-43-X
PB  - DGLR
CY  - Bonn
ER  - 
TY  - BOOK
A1  - Braun, Carsten
T1  - Ein modulares Verfahren für die numerische aeroelastische Analyse von Luftfahrzeugen
N2  - Aachen, Techn. Hochschule, Diss., 2007
Y1  - 2007
ER  - 
TY  - CHAP
A1  - Braun, Carsten
T1  - Ein modulares Verfahren für die numerische aeroelastische Analyse von Luftfahrzeugen
T2  - Motto: Wissen und Visionen für ein nachhaltiges Wachstum : Deutscher Luft- und Raumfahrtkongress 2008, Darmstadt, 23. bis 25. September 2008 / Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V. (DGLR). DGLR-Jahrbuch. 2008
Y1  - 2008
SP  - 787
EP  - 796
PB  - DGLR
CY  - Bonn
ER  - 
TY  - CHAP
A1  - Brandt, D.
A1  - Güsken, J.
A1  - Büchen, W.
A1  - Wahle, Michael
A1  - Huppatz, W.
A1  - Koewius, A.
A1  - Linn, W.
A1  - Sedlaceck, G.
T1  - Konstruieren mit Aluminium [Kapitel 4]
T2  - Aluminium-Taschenbuch / Hrsg.: Aluminium-Zentrale Düsseldorf. - Bd. 3: Weiterverarbeitung und Anwendung
Y1  - 1997
SN  - 3-87017-243-6
SP  - 359
EP  - 544
PB  - Aluminium-Verlag
CY  - Düsseldorf
ET  - 15. Auflage
ER  - 
TY  - CHAP
A1  - Brandini, Frederico P.
A1  - Baumann, Marcus
T1  - The potential role of melted 'brown ice' as sources of chelators and ammonia to the surface waters of the Weddell Sea, Antarctica
T2  - Proceedings of the NIPR Symposium on Polar Biology : 10
Y1  - 1997
SN  - 0914-563X
SP  - 1
EP  - 13
CY  - Tokyo
ER  - 
TY  - CHAP
A1  - Brandes, Sinja
A1  - Gligorevic, Snjezana
A1  - Schnell, Michael
A1  - Rokitansky, Carl-Herbert
A1  - Ehammer, Max
A1  - Gräupl, Thomas
A1  - Schlereth, Armin
A1  - Rihacek, Christoph
T1  - Final assessment of the B-VHF overlay concept
T2  - IEEE Aerospace Conference : 3-10 March 2007, Big Sky, Mont.
Y1  - 2007
SN  - 1-4244-0525-4
SP  - 1
EP  - 18
ER  - 
TY  - CHAP
A1  - Brandes, Sinja
A1  - Epple, U.
A1  - Gligorevic, Snjezana
A1  - Schnell, Michael
A1  - Haindl, Bernhard
A1  - Sajatovic, Miodrag
T1  - Physical layer specification of the L-band Digital Aeronautical Communications System (L-DACS1)
T2  - Integrated Communications, Navigation and Surveillance Conference : ICNS '09 : 13 - 15 May 2009, Arlington, Va.
Y1  - 2009
SN  - 978-1-4244-4733-6 ; 978-1-4244-4734-3
SP  - 1
EP  - 12
ER  - 
TY  - JOUR
A1  - Brahma, Aischarya
A1  - Musio, Biagia
A1  - Ismayilova, Uliviya
A1  - Nikbin, Nikzad
A1  - Kamptmann, Sonja B.
A1  - Siegert, Petra
A1  - Jeromin, Günter Erich
A1  - Ley, Steven
A1  - Pohl, Martina
T1  - An orthogonal biocatalytic approach for the safe generation and use of HCN in a multi-step continuous preparation of chiral O-acetylcyanohydrins
JF  - Synlett
Y1  - 2015
U6  - https://doi.org/10.1055/s-0035-1560644
SN  - 0936-5214 (Print) ; 1437-2096 (e-Journal)
IS  - Publ. online 29.09.2015
PB  - Thieme
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Bragard, Michael
A1  - van Hoek, H.
A1  - De Doncker, R. W.
T1  - A major design step in IETO concept realization that allows overcurrent protection and pushes limits of switching performance
JF  - IEEE transactions on power electronics
N2  - This paper presents the latest prototype of the integrated emitter turn-off thyristor concept, which potentially ranks among thyristor high-power devices like the gate turn-off thyristor and the integrated gate-commutated thyristor (IGCT). Due to modifications of the external driver stage and mechanical press-pack design optimization, this prototype allows for full device characterization. The turn-off capability was increased to 1600 A with an active silicon area of 823mm2 . This leads to a transient peak power of 672.1kW/cm² . Within this paper, measurements and concept assessment are presented and a comparison to state-of-the-art IGCT devices is provided.
Y1  - 2012
U6  - https://doi.org/10.1109/TPEL.2012.2189136
SN  - 0885-8993
VL  - 27
IS  - 9
SP  - 4163
EP  - 4171
PB  - IEEE
CY  - New York
ER  - 
TY  - CHAP
A1  - Bragard, Michael
A1  - Sube, Maike
A1  - Schneider, Maike
A1  - Jungemann, Christoph
T1  - Introducing a Cross-University Bachelor’s Programme with Orientation Semester - Enabling a Permeable Academic Education System
T2  - 2019 20th International Conference on Research and Education in Mechatronics (REM)
Y1  - 2019
SN  - 978-1-5386-9257-8
U6  - https://doi.org/10.1109/REM.2019.8744132
SP  - 1
EP  - 6
ER  - 
TY  - JOUR
A1  - Bragard, Michael
A1  - Soltau, N.
A1  - Thomas, S.
A1  - De Doncker, R. W.
T1  - The balance of renewable sources and user demands in grids : power electronics for modular battery energy storage systems
JF  - IEEE transactions on power electronics
N2  - The continuously growing amount of renewable sources starts compromising the stability of electrical grids. Contradictory to fossil fuel power plants, energy production of wind and photovoltaic (PV) energy is fluctuating. Although predictions have significantly improved, an outage of multi-MW offshore wind farms poses a challenging problem. One solution could be the integration of storage systems in the grid. After a short overview, this paper focuses on two exemplary battery storage systems, including the required power electronics. The grid integration, as well as the optimal usage of volatile energy reserves, is presented for a 5- kW PV system for home application, as well as for a 100- MW medium-voltage system, intended for wind farm usage. The efficiency and cost of topologies are investigated as a key parameter for large-scale integration of renewable power at medium- and low-voltage.
Y1  - 2010
U6  - https://doi.org/10.1109/TPEL.2010.2085455
SN  - 0885-8993
VL  - 25
IS  - 12
SP  - 3049
EP  - 3056
PB  - IEEE
CY  - New York
ER  - 
TY  - CHAP
A1  - Bragard, Michael
A1  - Soltau, N.
A1  - De Doncker, R. W.
A1  - Schmiegel, A.
T1  - Design and implementation of a 5 kW photovoltaic system with li-ion battery and additional DC-DC converter
T2  - 2010 IEEE Energy Conversion Congress and Exposition (ECCE 2010) : Atlanta, Georgia, USA, 12 - 16 September 2010 / [sponsored by the IEEE Power Electronics and Industry Applications Societies]
Y1  - 2010
SN  - 978-1-4244-5286-6 (Print)
SN  - 978-1-4244-5287-3 (Online)
U6  - https://doi.org/10.1109/ECCE.2010.5618220
SP  - 2944
EP  - 2949
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Bragard, Michael
A1  - Ronge, C.
A1  - De Doncker, R. W.
T1  - Sandwich design of high-power thyristor based devices with integrated MOSFET structure
T2  - Proceedings of the 2011 - 14th - European Conference on Power Electronics and Applications (EPE 2011) : Aug. 30, 2011 - Sept. 1, 2011, Birmingham, United Kingdom
Y1  - 2011
SN  - 978-1-61284-167-0 (Print)
SN  - 978-90-75815-15-3 (Online)
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Bragard, Michael
A1  - Richter, S. A.
T1  - LED-Kreisel als Praxis-Booster
JF  - Elektor : electronics worldwide
Y1  - 2008
SN  - 0932-5468
VL  - 39
IS  - 12
SP  - 16
ER  - 
TY  - CHAP
A1  - Bragard, Michael
A1  - Köllensperger, P.
A1  - De Doncker, R. W.
ED  - Dmowski, Antoni
T1  - Der Internally Commutated Thyristor (ICT) : ein neuartiger GCT mit integrierter Ausschalteinheit
T2  - "Nowoczesne urządzenia zasilające w energetyce" : X międzynarodowa konferencja naukowo techniczna, Zakopane, 14-16 marca 2007 r. : materiały konferencyjne
Y1  - 2007
SN  - 83-918709-7-9
SP  - 7.1
EP  - 7.9
PB  - APS Energia
CY  - Warszawa
ER  - 
TY  - PAT
A1  - Bragard, Michael
A1  - Hüning, Felix
A1  - Kowalewski, Paul
T1  - Vorrichtung zur Relativlagenbestimmung [Offenlegungschrift]
N2  - Die Erfindung betrifft eine Vorrichtung zur Bestimmung einer Relativlage zwischen einem feststehenden Teil und einem zu demselben in eine Bewegungsrichtung bewegbaren beweglichen Teil, wobei der feststehende Teil mit einem Wiegandsensor versehen ist, wobei der Wiegandsensor zwischen zwei gegenpolig zueinander ausgebildeten Permanentmagneten angeordnet ist und dass der bewegliche Teil eine Mehrzahl von beabstandet zueinander angeordneten Magnetisierungsstegen aus einem magnetisch leitenden Material aufweist, die in der Bewegungsrichtung zumindest eine gleich große Erstreckung aufweisen wie der Permanentmagnet, dass ein Abstand zwischen benachbarten Magnetisierungsstegen derart gewählt ist, dass in einer ersten Relativlage ein erster Permanentmagnet von einem der Magnetisierungsstege überdeckt ist und ein zweiter Permanentmagnet nicht von einem der Magnetisierungsstege überdeckt ist.
Y1  - 2023
N1  - Offenlegungschrift zu DE102022115350A1 2023.12.21
ER  - 
TY  - CHAP
A1  - Bragard, Michael
A1  - Hoek, Hauke van
A1  - Hoegen, Anne von
A1  - Doncker, Rik W. De
T1  - Motivation-based Learning: Teaching Fundamentals of Electrical Engineering with an LED Spinning Top
T2  - 2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)
Y1  - 2018
SN  - 978-1-5386-6903-7
U6  - https://doi.org/10.1109/RTUCON.2018.8659810
SP  - 1
EP  - 6
ER  -