@article{YazdanbakhshSolbachBitz2012,
  author    = {Yazdanbakhsh, Pedram and Solbach, Klaus and Bitz, Andreas},
  title     = {Variable power combiner for RF mode shimming in 7-T MR imaging},
  series = {IEEE Transaction on Biomedical Engineering},
  volume    = {59},
  journal   = {IEEE Transaction on Biomedical Engineering},
  number    = {9},
  publisher = {IEEE},
  address   = {New York},
  issn      = {1558-2531},
  doi       = {10.1109/TBME.2012.2205926},
  pages     = {2549 -- 2557},
  year      = {2012},
  abstract  = {This contribution discusses the utilization of RF power in an MRI system with RF mode shimming which enables the superposition of circularly polarized modes of a transmit RF coil array driven by a Butler matrix. Since the required power for the individual modes can vary widely, mode-shimming can result in a significant underutilization of the total available RF power. A variable power combiner (VPC) is proposed to improve the power utilization: it can be realized as a reconfiguration of the MRI transmit system by the inclusion of one additional matrix network which receives the power from all transmit amplifiers at its input ports and provides any desired (combined) power distribution at its output ports by controlling the phase and amplitude of the amplifiers' input signals. The power distribution at the output ports of the VPC is then fed into the "mode" ports of the coil array Butler matrix in order to superimpose the spatial modes at the highest achievable power utilization. The VPC configuration is compared to the standard configuration of the transmit chain of our MRI system with 8 transmit channels and 16 coils. In realistic scenarios, improved power utilization was achieved from 17\% to 60\% and from 14\% to 55\% for an elliptical phantom and a region of interest in the abdomen, respectively, and an increase of the power utilization of 1 dB for a region of interest in the upper leg. In general, it is found that the VPC allows significant improvement in power utilization when the shimming solution demands only a few modes to be energized, while the technique can yield loss in power utilization in cases with many modes required at high power level.},
  language  = {en}
}
@book{WosnitzaHilgers2012,
  author    = {Wosnitza, Franz and Hilgers, Hans Gerd},
  title     = {Energieeffizienz und Energiemanagement : Ein {\"U}berblick heutiger M{\"o}glichkeiten und Notwendigkeiten},
  publisher = {Vieweg + Teubner},
  address   = {Wiesbaden},
  isbn      = {978-3-8348-8671-2},
  pages     = {Elektronische Ressource},
  year      = {2012},
  language  = {de}
}
@book{WosnitzaHilgers2012,
  author    = {Wosnitza, Franz and Hilgers, Hans Gerd},
  title     = {Energieeffizienz und Energiemanagement : ein {\"U}berblick heutiger M{\"o}glichkeiten und Notwendigkeiten},
  publisher = {Springer Spektrum},
  address   = {Wiesbaden},
  isbn      = {978-3-8348-1941-3},
  pages     = {XVII, 548 S. : Ill., graph. Darst.},
  year      = {2012},
  language  = {en}
}
@article{Wolf2012,
  author    = {Wolf, Martin},
  title     = {Von Security Awareness zum Secure Behaviour},
  series = {Hakin9 Extra - IT-Forensik},
  volume    = {2012},
  journal   = {Hakin9 Extra - IT-Forensik},
  number    = {5},
  publisher = {Software Wydawnictwo},
  address   = {Warszawa},
  issn      = {1733-7186},
  pages     = {18 -- 19},
  year      = {2012},
  abstract  = {Security Awareness ist derzeit ein viel diskutiertes Thema. Es reicht nicht, einfach nur ein paar technische Systeme (z.B. Firewalls) zu installieren, um ein angemessenes Schutzniveau zu erzielen. Neben einer guten Organisation von IT Security ist es auch notwendig, den Mitarbeiter einzubinden. Der vielzitierte "Faktor Mensch" ist derjenige, der die Technik korrekt anwenden muss und der durch falsches Verhalten technische und organisatorische Schutzmaßnahmen aushebeln kann. Deshalb reicht es nicht aus, wenn sich der Mitarbeiter der Gefahren bewusst ("aware") ist, er muss auch dementsprechend "sicher" handeln.},
  language  = {de}
}
@article{SchubaHoefken2012,
  author    = {Schuba, Marko and H{\"o}fken, Hans},
  title     = {Backtrack5: Datensammlung und Reporterstellung f{\"u}r Pentester mit MagicTree / H{\"o}fken, Hans ; Schuba, Marko},
  series = {Hakin9. 73 (2012), H. 3},
  journal   = {Hakin9. 73 (2012), H. 3},
  publisher = {-},
  isbn      = {1733-7186},
  pages     = {12 -- 16},
  year      = {2012},
  language  = {de}
}
@article{SchubaHoefkenSchaefer2012,
  author    = {Schuba, Marko and H{\"o}fken, H. and Schaefer, T.},
  title     = {Smartphone Forensik},
  series = {Hakin9 : Practical Protection (2012)},
  journal   = {Hakin9 : Practical Protection (2012)},
  publisher = {-},
  isbn      = {1733-7186},
  pages     = {10 -- 20},
  year      = {2012},
  language  = {de}
}
@inproceedings{SchoppNachtrodtHeuermannetal.2012,
  author    = {Schopp, Christoph and Nachtrodt, Frederik and Heuermann, Holger and Scherer, Ulrich W. and Mostacci, Domiziano and Finger, Torsten and Tietsch, Wolfgang},
  title     = {A novel 2.45 GHz/200 W Microwave Plasma Jet for High Temperature Applications above 3600 K},
  series = {Journal of Physics : Conference Series},
  volume    = {406},
  booktitle = {Journal of Physics : Conference Series},
  number    = {012029},
  issn      = {1742-6596},
  pages     = {5},
  year      = {2012},
  language  = {en}
}
@article{SchifferFerreinLakemeyer2012,
  author    = {Schiffer, Stefan and Ferrein, Alexander and Lakemeyer, Gerhard},
  title     = {Caesar: an intelligent domestic service robot},
  series = {Intelligent service robotics},
  volume    = {5},
  journal   = {Intelligent service robotics},
  number    = {4},
  publisher = {Springer},
  address   = {Berlin},
  issn      = {1861-2776},
  doi       = {10.1007/s11370-012-0118-y},
  pages     = {259 -- 276},
  year      = {2012},
  abstract  = {In this paper we present CAESAR, an intelligent domestic service robot. In domestic settings for service robots complex tasks have to be accomplished. Those tasks benefit from deliberation, from robust action execution and from flexible methods for human-robot interaction that account for qualitative notions used in natural language as well as human fallibility. Our robot CAESAR deploys AI techniques on several levels of its system architecture. On the low-level side, system modules for localization or navigation make, for instance, use of path-planning methods, heuristic search, and Bayesian filters. For face recognition and human-machine interaction, random trees and well-known methods from natural language processing are deployed. For deliberation, we use the robot programming and plan language READYLOG, which was developed for the high-level control of agents and robots; it allows combining programming the behaviour using planning to find a course of action. READYLOG is a variant of the robot programming language Golog. We extended READYLOG to be able to cope with qualitative notions of space frequently used by humans, such as "near" and "far". This facilitates human-robot interaction by bridging the gap between human natural language and the numerical values needed by the robot. Further, we use READYLOG to increase the flexible interpretation of human commands with decision-theoretic planning. We give an overview of the different methods deployed in CAESAR and show the applicability of a system equipped with these AI techniques in domestic service robotics},
  language  = {en}
}
@inproceedings{RitzTerhaarWallenborn2012,
  author    = {Ritz, Thomas and Terhaar, Kristin and Wallenborn, Ramona},
  title     = {HMI f{\"u}r eCarSharing : ein Baustein f{\"u}r nachhaltige Mobilit{\"a}t},
  series = {Mensch \& Computer 2012 - Workshopband : 12. Fach{\"u}bergreifende Konferenz f{\"u}r interaktive und kooperative Medien ; interaktiv informiert - allgegenw{\"a}rtig und allumfassend!?},
  booktitle = {Mensch \& Computer 2012 - Workshopband : 12. Fach{\"u}bergreifende Konferenz f{\"u}r interaktive und kooperative Medien ; interaktiv informiert - allgegenw{\"a}rtig und allumfassend!?},
  editor    = {Reiterer, Harald},
  publisher = {Oldenbourg},
  address   = {M{\"u}nchen},
  isbn      = {978-3-486-71990-1 (Print)},
  doi       = {10.1524/9783486719918.341},
  pages     = {381 -- 388},
  year      = {2012},
  language  = {de}
}
@article{OrzadaMaderwaldPoseretal.2012,
  author    = {Orzada, S. and Maderwald, S. and Poser, B. A. and Johst, S. and Kannengiesser, S. and Ladd, M. E. and Bitz, Andreas},
  title     = {Time-interleaved acquisition of modes: an analysis of SAR and image contrast implications},
  series = {Magnetic Resonance in Medicine},
  volume    = {67},
  journal   = {Magnetic Resonance in Medicine},
  number    = {4},
  publisher = {Wiley-Liss},
  address   = {New York},
  issn      = {1522-2594},
  doi       = {10.1002/mrm.23081},
  pages     = {1033 -- 1041},
  year      = {2012},
  abstract  = {s the magnetic field strength and therefore the operational frequency in MRI are increased, the radiofrequency wavelength approaches the size of the human head/body, resulting in wave effects which cause signal decreases and dropouts. Especially, whole-body imaging at 7 T and higher is therefore challenging. Recently, an acquisition scheme called time-interleaved acquisition of modes has been proposed to tackle the inhomogeneity problems in high-field MRI. The basic premise is to excite two (or more) different Burn:x-wiley:07403194:media:MRM23081:tex2gif-stack-1 modes using static radiofrequency shimming in an interleaved acquisition, where the complementary radiofrequency patterns of the two modes can be exploited to improve overall signal homogeneity. In this work, the impact of time-interleaved acquisition of mode on image contrast as well as on time-averaged specific absorption rate is addressed in detail. Time-interleaved acquisition of mode is superior in Burn:x-wiley:07403194:media:MRM23081:tex2gif-stack-2 homogeneity compared with conventional radiofrequency shimming while being highly specific absorption rate efficient. Time-interleaved acquisition of modes can enable almost homogeneous high-field imaging throughout the entire field of view in PD, T2, and T2*-weighted imaging and, if a specified homogeneity criterion is met, in T1-weighted imaging as well.},
  language  = {en}
}