TY  - CHAP
A1  - Müller, Tim M.
A1  - Schmitt, Andreas
A1  - Leise, Philipp
A1  - Meck, Tobias
A1  - Altherr, Lena
A1  - Pelz, Peter F.
A1  - Pfetsch, Marc E.
T1  - Validation of an optimized resilient water supply system
T2  - Uncertainty in Mechanical Engineering
N2  - Component failures within water supply systems can lead to significant performance losses. One way to address these losses is the explicit anticipation of failures within the design process. We consider a water supply system for high-rise buildings, where pump failures are the most likely failure scenarios. We explicitly consider these failures within an early design stage which leads to a more resilient system, i.e., a system which is able to operate under a predefined number of arbitrary pump failures. We use a mathematical optimization approach to compute such a resilient design. This is based on a multi-stage model for topology optimization, which can be described by a system of nonlinear inequalities and integrality constraints. Such a model has to be both computationally tractable and to represent the real-world system accurately. We therefore validate the algorithmic solutions using experiments on a scaled test rig for high-rise buildings. The test rig allows for an arbitrary connection of pumps to reproduce scaled versions of booster station designs for high-rise buildings. We experimentally verify the applicability of the presented optimization model and that the proposed resilience properties are also fulfilled in real systems.
KW  - Optimization
KW  - Mixed-integer nonlinear programming
KW  - Water distribution system
KW  - Resilience
KW  - Validation
Y1  - 2021
SN  - 978-3-030-77255-0
SN  - 978-3-030-77256-7
U6  - http://dx.doi.org/10.1007/978-3-030-77256-7_7
N1  - Proceedings of the 4th International Conference on Uncertainty in Mechanical Engineering (ICUME 2021), June 7–8, 2021
SP  - 70
EP  - 80
PB  - Springer
CY  - Cham
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
A1  - Ihrig, H.
T1  - Valence change and phase stability of 3d-doped BaTiO3 annealed in oxygen and hydrogen. Hagemann, H. J.; Ihrig, H.
JF  - Physical Review B.. 20 (1979), H. 9
Y1  - 1979
SN  - 1095-3795
SP  - 3871
EP  - 3878
ER  - 
TY  - JOUR
A1  - Hüning, Felix
T1  - Using Trench PowerMOSFETs in Linear Mode
JF  - Power Electronics Europe (2012)
N2  - If we think about applications for modern Power MOSFETs using trench technology, running them in linear mode may not be top of the priority list. Yet there are multiple uses for Trench Power MOSFETs in linear mode. In fact, even turning the device on and off in switching applications is a form of linear operation. Also, these components can be run in linear mode to protect the device against voltage surges. This article will illustrate the factors that need to be considered for linear operation and show how Trench Power MOSFETs are suited to it.
Y1  - 2012
SN  - 1748-3530
SP  - 27
EP  - 29
PB  - DFA Media
CY  - Tonbridge
ER  - 
TY  - CHAP
A1  - Rausch, Lea
A1  - Friesen, John
A1  - Altherr, Lena
A1  - Pelz, Peter F.
ED  - Kliewer, Natalia
ED  - Ehmke, Jan Fabian
ED  - Borndörfer, Ralf
T1  - Using mixed-integer programming for the optimal design of water supply networks for slums
T2  - Operations Research Proceedings 2017
N2  - The UN sets the goal to ensure access to water and sanitation for all people by 2030. To address this goal, we present a multidisciplinary approach for designing water supply networks for slums in large cities by applying mathematical optimization. The problem is modeled as a mixed-integer linear problem (MILP) aiming to find a network describing the optimal supply infrastructure. To illustrate the approach, we apply it on a small slum cluster in Dhaka, Bangladesh.
Y1  - 2018
SN  - 978-3-319-89919-0 (Print)
SN  - 978-3-319-89920-6 (Online)
U6  - http://dx.doi.org/10.1007/978-3-319-89920-6_68
N1  - International Conference of the German Operations Research Society (GOR), Freie Universiät Berlin, Germany, September 6-8, 2017.
SP  - 509
EP  - 516
PB  - Springer
CY  - Cham
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Fritz, Christian
A1  - Lakemeyer, Gerhard
T1  - Using Golog for Deliberation and Team Coordination in Robotic Soccer / Ferrein, Alexander ; Fritz, Christian ; Lakemeyer, Gerhard
JF  - Künstliche Intelligenz : KI. 19 (2005), H. 1
Y1  - 2005
SN  - 0933-1875
SP  - 24
EP  - 30
ER  - 
TY  - CHAP
A1  - Fuchs, Britta
A1  - Ritz, Thomas
A1  - Strauch, Jakob
ED  - Obaidat, Mohammad S.
T1  - Usability of mobile applications : dissemination of usability engineering in small and medium enterprises
T2  - Proceedings of the International Conference on Data Communication Networking, e-Business and Optical Communication Systems : Rome, Italy, 24 - 27 July, 2012 ; [integrated in the ICETE (International Conference on e-Business and Telecommunications)]
Y1  - 2012
SN  - 978-989-8565-23-5
N1  - Nebentitel: DCNET; ICE-B; OPTICS
SP  - 272
EP  - 277
PB  - SciTePress
CY  - [Lissabon]
ER  - 
TY  - CHAP
A1  - Fuchs, Britta
A1  - Ritz, Thomas
T1  - Usability for Blended Shopping - Solving Major Flaws by Applying Usability Engineering and Proven Integration Technologies
T2  - Proceedings of the 11th International Conference on e-Business, ICE-B 2014, Vienna, Austria
Y1  - 2014
SN  - 978-989-758-043-7
U6  - http://dx.doi.org/10.5220/0005113502160223
SP  - 216
EP  - 223
ER  - 
TY  - JOUR
A1  - Foltz, Christian
A1  - Schneider, Nicole
A1  - Wolf, Martin
A1  - Kausch, Bernhard
A1  - Schlick, Christopher
A1  - Luczak, Holger
ED  - Nagl, Manfred
T1  - Usability engineering
JF  - Collaborative and distributed chemical engineering : from understanding to substantial design process support; results of the IMPROVE Project. - (Lecture notes in computer science ; 4970)
Y1  - 2008
SN  - 978-3-540-70552-9
U6  - http://dx.doi.org/10.1007/978-3-540-70552-9_21
SP  - 527
EP  - 554
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Jacobs, Stefan
A1  - Lakemeyer, Gerhard
T1  - Unreal Golog Bots / Jacobs, Stefan ; Ferrein, Alexander ; Lakemeyer, Gerhard
JF  - IJCAI-05 Workshop on Reasoning, Representation, and Learning in Computer Games
Y1  - 2005
SP  - 31
EP  - 36
ER  - 
TY  - JOUR
A1  - Schuba, Marko
A1  - Busboom, Axel
A1  - Herwono, Ian
A1  - Zavagli, Guido
T1  - Unambiguous Device Identification and Fast Connection Setup in Bluetooth / Busboom, Axel ; Herwono, Ian ; Schuba, Marko ; Zavagli, Guido
JF  - European wireless 2002 : next generation wireless networks: technologies, protocols, services and applications ; technical sessions: 26 - 28 February 2002, tutorials: 25 February 2002, Centro Affari, Florence, Italy ; proceedings / sponsored by EUREL ... General chair: Luciano Lenzini
Y1  - 2002
SP  - 1
EP  - 5
ER  - 
TY  - BOOK
A1  - Benkner, Thorsten
A1  - Stepping, Christoph
T1  - UMTS - Universal Mobile Telecommunications System
Y1  - 2002
SN  - 3-935340-07-9
PB  - Schlembach
CY  - Weil der Stadt
ER  - 
TY  - JOUR
A1  - Heuermann, Holger
A1  - Sadeghfam, Arash
A1  - Boehm, H.
T1  - Ultra Compact Multi-Mode Filter with Novel Rat-Race Inductor. Sadeghfam, Arash; Heuermann, Holger; Boehm, H.
JF  - Conference proceedings : 3 - 7 October 2005, CNIT la Défense, Paris, France; [comprises the] 35th European Microwave Conference 2005 ; The European Conference on Wireless Technology 2005 ; European Radar Conference 2005 ; GAAS 2005, The European Gallium A. Vol. 2
Y1  - 2005
SN  - 2-9600551-0-1
N1  - European Microwave Conference ; (35, 2005, Paris) ; European Microwave Week ; (2005, Paris)
SP  - 4 pp.
PB  - Horizon House Publ
CY  - London
ER  - 
TY  - CHAP
A1  - Walter, Michael
A1  - Gligorevic, Snjezana
A1  - Detert, Thorben
A1  - Schnell, Michael
T1  - UHF/VHF air-to-air propagation measurements
T2  - Proceedings of the Fourth European Conference on Antennas and Propagation (EuCAP) : 12 - 16 April 2010, Barcelona, Spain
Y1  - 2010
SN  - 978-1-4244-6431-9 ; 978-84-7653-472-4
SP  - 1
EP  - 5
ER  - 
TY  - CHAP
A1  - Ferrein, Alexander
A1  - Bharatheesha, Mukunda
A1  - Schiffer, Stefan
A1  - Corbato, Carlos Hernandez
T1  - TRROS 2018 :  Teaching Robotics with ROS Workshop at ERF 2018;  Proceedings of the Workshop on Teaching Robotics with ROS (held at ERF 2018), co-located with European Robotics Forum 2018 (ERF 2018), Tampere, Finland, March 15th, 2018
T2  - CEUR Workshop Proceedings
Y1  - 2019
SN  - 1613-0073
IS  - Vol-2329
ER  - 
TY  - CHAP
A1  - Bensberg, Frank
A1  - Auth, Gunnar
A1  - Czarnecki, Christian
A1  - Wörndle, Christopher
ED  - Kemal İlter, H.
T1  - Transforming literature-intensive research processes through text analytics – design, implementation and lessons learned
N2  - The continuing growth of scientific publications raises the question how research processes can be digitalized and thus realized more productively. Especially in information technology fields, research practice is characterized by a rapidly growing volume of publications. For the search process various information systems exist. However, the analysis of the published content is still a highly manual task. Therefore, we propose a text analytics system that allows a fully digitalized analysis of literature sources. We have realized a prototype by using EBSCO Discovery Service in combination with IBM Watson Explorer and demonstrated the results in real-life research projects. Potential addressees are research institutions, consulting firms, and decision-makers in politics and business practice.
KW  - Text analytics
KW  - Text mining
KW  - Literature review
KW  - Research process
Y1  - 2018
U6  - http://dx.doi.org/10.6084/m9.figshare.7582073.v1
N1  - 5th International Management Information Systems Conference.
October 24-26 2018, Ankara
ER  - 
TY  - CHAP
A1  - Priede, Gareth
A1  - Ferrein, Alexander
T1  - Towards passive walking for the fully-actuated biped robot Nao
T2  - Emerging trends in computing, informatics, systems sciences, and engineering. (Lecture notes in electrical engineering : vol. 151)
N2  - Many biped robots deploy a form of gait that follows the zero moment point (ZMP) approach, that is, the robot is in a stable position at any point in time. This requires the robot to be fully actuated. While very stable, the draw-backs of this approach are a fairly slow gait and high energy consumption. An alternative approach is the so-called passive-dynamic walking, where the gait makes use of the inertia and dynamic stability of the robot. In this paper we describe our ongoing work of combining the principles of passive-dynamic walking on the fully-actuated biped robot Nao, which is also deployed for robotic soccer applications. We present a simple controller that allows the robot to stably rock sidewards, showing a closed limit-cycle. We discuss first results of superimposing a forward motion on the sidewards motion. Based on this we expect to endow the Nao with a fast, robust, and stable passive-dynamic walk on the fully-actuated Nao in the future.
Y1  - 2013
SN  - 978-1-4614-3557-0 ; 978-1-4614-3558-7
U6  - http://dx.doi.org/10.1007/978-1-4614-3558-7_18
SP  - 225
EP  - 236
PB  - Springer
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Booysen, Tracy
A1  - Rieger, Michael
A1  - Ferrein, Alexander
T1  - Towards inexpensive robots for science & technology teaching and education in Africa
Y1  - 2011
SN  - 978-1-61284-992-8
N1  - AFRICON, 2011
SP  - 1
EP  - 6
PB  - IEEE
CY  - New York
ER  - 
TY  - CHAP
A1  - Serror, Martin
A1  - Henze, Martin
A1  - Hack, Sacha
A1  - Schuba, Marko
A1  - Wehrle, Klaus
T1  - Towards in-network security for smart homes
T2  - 13th International Conference on Availability, Reliability and Security, ARES 2018; Hamburg; Germany; 27 August 2018 through 30 August 2018
Y1  - 2018
SN  - 978-145036448-5
U6  - http://dx.doi.org/10.1145/3230833.3232802
SP  - Article numer 3232802
ER  - 
TY  - CHAP
A1  - Niemüller, Tim
A1  - Ewert, Daniel
A1  - Reuter, Sebastian
A1  - Karras, Ulrich
A1  - Ferrein, Alexander
T1  - Towards benchmarking cyber-physical systems in factory automation scenarios
T2  - KI 2013: advances in artificial intelligence : 36th Annual German Conference on AI, Koblenz, Germany, September 16-20, 2013 ; proceedings / Ingo J. Timm ... (ed.). (Lecture notes in computer science ; 8077)
Y1  - 2013
SN  - 978-3-642-40941-7
SP  - 296
EP  - 299
PB  - Springer
CY  - Berlin [u.a.]
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
T1  - Towards applying soccer moves in the RoboCup Standard Platform League
JF  - ÖGAI-Journal
Y1  - 2008
SN  - 0254-4326
VL  - Bd. 27
IS  - H. 3
SP  - 4
EP  - 9
ER  -