@article{SchifferFerreinLakemeyer2010, author = {Schiffer, Stefan and Ferrein, Alexander and Lakemeyer, Gerhard}, title = {Proceedings of the Fourth International Conference on Intelligent Robotics and Applications (ICIRA 2011)}, series = {Proceedings of the Fourth International Conference on Intelligent Robotics and Applications (ICIRA 2011)}, journal = {Proceedings of the Fourth International Conference on Intelligent Robotics and Applications (ICIRA 2011)}, pages = {1 -- 10}, year = {2010}, language = {en} } @article{HeuermannSchiek1993, author = {Heuermann, Holger and Schiek, B.}, title = {Procedures for the Determination of the Scattering Parameters for Network Analyzer Calibration}, series = {IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 42 (1993), H. 2}, journal = {IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 42 (1993), H. 2}, isbn = {0018-9456}, pages = {528 -- 531}, year = {1993}, language = {en} } @article{ClaessensFuchsbergerGuentheretal.2003, author = {Claessens, J. and Fuchsberger, A. and G{\"u}nther, C. and Horn, G. and Howker, K. and Hulsebosch, R.J. and Mitchell, C. and Paterson, K. and Preneel, B. and Schellekens, D. and Schuba, Marko}, title = {Pioneering Advanced Mobile Privacy and Security}, pages = {1 -- 17}, year = {2003}, language = {en} } @article{HulseboschGuentherHornetal.2004, author = {Hulsebosch, R. J. and G{\"u}nther, C. and Horn, C. and Holtmanns, S. and Howker, K. and Paterson, K. and Claessens, J. and Schuba, Marko}, title = {Pioneering Advanced Mobile Privacy and Security}, series = {Security for mobility}, journal = {Security for mobility}, editor = {Mitchell, Chris J.}, publisher = {Institution of Electrical Engineers}, address = {London}, isbn = {9781849190886}, doi = {10.1049/PBTE051E_ch}, pages = {383 -- 432}, year = {2004}, language = {en} } @article{PrumeMuraltCalameetal.2007, author = {Prume, Klaus and Muralt, P. and Calame, F. and Schmitz-Kempen, T.}, title = {Piezoelectric thin films: evaluation of electrical and electromechanical characteristics for MEMS devices / Prume, K. ; Muralt, P. ; Calame, F. ; Schmitz-Kempen, T. ; Tiedke, S. ;}, series = {IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 54 (2007), H. 1}, journal = {IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 54 (2007), H. 1}, isbn = {0885-3010}, pages = {81 -- 14}, year = {2007}, language = {en} } @article{HagemannGudatKunz1974, author = {Hagemann, Hans-J{\"u}rgen and Gudat, W. and Kunz, C.}, title = {Photoabsorption of alloys of Al with transition metals V, Fe, Ni and Cu and Pr near the Al L₂,₃-edge}, series = {Solid State Communications}, volume = {15}, journal = {Solid State Communications}, number = {3}, publisher = {Elsevier}, address = {Amsterdam}, isbn = {0038-1098}, doi = {10.1016/0038-1098(74)91165-X}, pages = {655 -- 658}, year = {1974}, abstract = {The onset of Al 2p transitions of VAl₃, FeAl, NiAl, NiAl₃, CuAl₂, PrAl₂ and the disordered alloys V-Al (16 at \% Al, 28\%, 41\%), Fe-Al (11\%) is shifted up to 1.1 eV. New pronounced structure develops close to the onset which for NiAl agrees with a density of states calculation by Connolly and Johnson.}, language = {en} } @article{HagemannGudatKunz1976, author = {Hagemann, Hans-J{\"u}rgen and Gudat, W. and Kunz, C.}, title = {Photoabsorption coefficient of alloys of Al with transition metals V, Fe, Ni and Cu and Pr from 30 to 150 eV photon energy}, series = {Physica status solidi b}, volume = {74}, journal = {Physica status solidi b}, number = {2}, publisher = {Wiley-VCH}, address = {Berlin}, isbn = {0031-8957}, doi = {10.1002/pssb.2220740211}, pages = {507 -- 521}, year = {1976}, abstract = {The absorption coefficient of VAI3, FeAI, NiAI, NiAl2, CuAI2, PrAl2, and of disordered V-AI (16 at\% AI, 28\%, 41\%) and Fe-AI (11\%) alloys has been measured in the region of the M₂,₃ absorption of the transition metals and the Labsorption of AI. The strong changes of the AI spectrum in the region of the 100 eV maximum upon alloying are explained as another evidence of the EXAFS (extended X-ray absorption fine structure) nature of these structures. The broad, prominent absorption peaks from the 3p excitations in V and Fe and from the 4d excitations in Pr are influenced only little on allyoing and thus appear to be of atomic origin. The fine structure at the onset of the Pr 4d transitions is identical in the metal and the alloy but differs from that of Pr oxide. The only M₂,₃ edge which is detectably shifted is that of Ni (up to 2.1 eV), whereas the onset of the AI L₂,₃ edge is shifted in all the alloys (up to 1.1 eV). The shifts are interpreted in accordance with X-ray fluorescence and nuclear resonance measurements as changes of the density of states in the valence band of the alloys.}, language = {en} } @article{LagemaatVosMaasetal.2014, author = {Lagemaat, Miriam W. and Vos, Eline K. and Maas, Marnix C. and Bitz, Andreas and Orzada, Stephan and Uden, Mark J. van and Kobus, Thiele and Heerschap, Arend and Scheenen, Tom W. J.}, title = {Phosphorus magnetic resonance spectroscopic imaging at 7 T in patients with prostate cancer}, series = {Investigative Radiology}, volume = {49}, journal = {Investigative Radiology}, number = {5}, publisher = {Lippincott Williams \& Wilkins}, address = {Philadelphia, Pa.}, issn = {1536-0210}, doi = {10.1097/RLI.0000000000000012}, pages = {363 -- 372}, year = {2014}, abstract = {Objectives The aim of this study was to identify characteristics of phosphorus (³¹P) spectra of the human prostate and to investigate changes of individual phospholipid metabolites in prostate cancer through in vivo ³¹P magnetic resonance spectroscopic imaging (MRSI) at 7 T. Materials and Methods In this institutional review board-approved study, 15 patients with biopsy-proven prostate cancer underwent T₂-weighted magnetic resonance imaging and 3-dimensional ³¹P MRSI at 7 T. Voxels were selected at the tumor location, in normal-appearing peripheral zone tissue, normal-appearing transition zone tissue, and in the base of the prostate close to the seminal vesicles. Phosphorus metabolite ratios were determined and compared between tissue types. Results Signals of phosphoethanolamine (PE) and phosphocholine (PC) were present and well resolved in most ³¹P spectra in the prostate. Glycerophosphocholine signals were observable in 43\% of the voxels in malignant tissue, but in only 10\% of the voxels in normal-appearing tissue away from the seminal vesicles. In many spectra, independent of tissue type, 2 peaks resonated in the chemical shift range of inorganic phosphate, possibly representing 2 separate pH compartments. The PC/PE ratio in the seminal vesicles was highly elevated compared with the prostate in 5 patients. A considerable overlap of ³¹P metabolite ratios was found between prostate cancer and normal-appearing prostate tissue, preventing direct discrimination of these tissues. The only 2 patients with high Gleason scores tumors (≥4+5) presented with high PC and glycerophosphocholine levels in their cancer lesions. Conclusions Phosphorus MRSI at 7 T shows distinct features of phospholipid metabolites in the prostate gland and its surrounding structures. In this exploratory study, no differences in ³¹P metabolite ratios were observed between prostate cancer and normal-appearing prostate tissue possibly because of the partial volume effects of small tumor foci in large MRSI voxels.}, language = {en} } @article{Ritz2002, author = {Ritz, Thomas}, title = {Personalized Information Services: Production and Distribution of these Services employing Mass-Customization}, year = {2002}, language = {en} } @article{Ritz2000, author = {Ritz, Thomas}, title = {Personalized information services : an electronic information commodity and its production}, series = {International Journal of E-Business Strategy Management}, volume = {2}, journal = {International Journal of E-Business Strategy Management}, number = {2}, issn = {1467-0305}, year = {2000}, language = {en} } @article{SchubaHermanns1995, author = {Schuba, Marko and Hermanns, Oliver}, title = {Performance Investigations of the IP Multicast Architecture / Hermanns, Oliver ; Schuba, Marko}, series = {Performance of the IP Multicast Achitecture . Proceedings JENC 6. Proceedings of the 6th Joint European Networking Conference, Tel Aviv}, journal = {Performance of the IP Multicast Achitecture . Proceedings JENC 6. Proceedings of the 6th Joint European Networking Conference, Tel Aviv}, pages = {121-1 -- 121-8}, year = {1995}, language = {en} } @article{SchubaHaverkortSchneider2000, author = {Schuba, Marko and Haverkort, Boudewijn R. and Schneider, Gaby}, title = {Performance evaluation of multicast communication in packet-switched networks / Schuba, Marko ; Haverkort, Boudewijn R. ; Schneider, Gaby}, series = {Performance Evaluation. 39 (2000), H. 1-4}, journal = {Performance Evaluation. 39 (2000), H. 1-4}, isbn = {0166-5316}, pages = {61 -- 80}, year = {2000}, language = {en} } @article{FiedlerOrzadaFloeseretal.2022, author = {Fiedler, Thomas M. and Orzada, Stephan and Fl{\"o}ser, Martina and Rietsch, Stefan H. G. and Schmidt, Simon and Stelter, Jonathan K. and Wittrich, Marco and Quick, Harald H. and Bitz, Andreas and Ladd, Mark E.}, title = {Performance and safety assessment of an integrated transmit array for body imaging at 7 T under consideration of specificabsorption rate, tissue temperature, and thermal dose}, series = {NMR in Biomedicine}, volume = {35}, journal = {NMR in Biomedicine}, number = {5}, publisher = {Wiley}, issn = {0952-3480 (Print)}, doi = {10.1002/nbm.4656}, pages = {1 -- 17}, year = {2022}, abstract = {In this study, the performance of an integrated body-imaging array for 7 T with 32 radiofrequency (RF) channels under consideration of local specific absorption rate (SAR), tissue temperature, and thermal dose limits was evaluated and the imaging performance was compared with a clinical 3 T body coil. Thirty-two transmit elements were placed in three rings between the bore liner and RF shield of the gradient coil. Slice-selective RF pulse optimizations for B1 shimming and spokes were performed for differently oriented slices in the body under consideration of realistic constraints for power and local SAR. To improve the B1+ homogeneity, safety assessments based on temperature and thermal dose were performed to possibly allow for higher input power for the pulse optimization than permissible with SAR limits. The results showed that using two spokes, the 7 T array outperformed the 3 T birdcage in all the considered regions of interest. However, a significantly higher SAR or lower duty cycle at 7 T is necessary in some cases to achieve similar B1+ homogeneity as at 3 T. The homogeneity in up to 50 cm-long coronal slices can particularly benefit from the high RF shim performance provided by the 32 RF channels. The thermal dose approach increases the allowable input power and the corresponding local SAR, in one example up to 100 W/kg, without limiting the exposure time necessary for an MR examination. In conclusion, the integrated antenna array at 7 T enables a clinical workflow for body imaging and comparable imaging performance to a conventional 3 T clinical body coil.}, language = {en} } @article{Schuba1999, author = {Schuba, Marko}, title = {Performance Analysis of Reliable Multicast Mechanisms for Widely Spread Distributed Applications in the Internet}, series = {International Conference on Parallel and Distributed Processing Techniques and Applications : PDPTA '99 ; June 28 - July 1, 1999, Las Vegas, Nevada, USA / ed.: Hamid R. Arabnia}, journal = {International Conference on Parallel and Distributed Processing Techniques and Applications : PDPTA '99 ; June 28 - July 1, 1999, Las Vegas, Nevada, USA / ed.: Hamid R. Arabnia}, isbn = {1892512157}, pages = {1 -- 7}, year = {1999}, language = {en} } @article{FiedlerOrzadaFloeseretal.2021, author = {Fiedler, Thomas M. and Orzada, Stephan and Fl{\"o}ser, Martina and Rietsch, Stefan H. G. and Quick, Harald H. and Ladd, Mark E. and Bitz, Andreas}, title = {Performance analysis of integrated RF microstrip transmit antenna arrays with high channel count for body imaging at 7 T}, series = {NMR in Biomedicine}, volume = {34}, journal = {NMR in Biomedicine}, number = {7}, publisher = {Wiley}, address = {Weinheim}, issn = {0952-3480 (ISSN)}, doi = {10.1002/nbm.4515}, pages = {18 SeitenWiley}, year = {2021}, abstract = {The aim of the current study was to investigate the performance of integrated RF transmit arrays with high channel count consisting of meander microstrip antennas for body imaging at 7 T and to optimize the position and number of transmit ele- ments. RF simulations using multiring antenna arrays placed behind the bore liner were performed for realistic exposure conditions for body imaging. Simulations were performed for arrays with as few as eight elements and for arrays with high channel counts of up to 48 elements. The B1+ field was evaluated regarding the degrees of freedom for RF shimming in the abdomen. Worst-case specific absorption rate (SARwc ), SAR overestimation in the matrix compression, the number of virtual obser- vation points (VOPs) and SAR efficiency were evaluated. Constrained RF shimming was performed in differently oriented regions of interest in the body, and the devia- tion from a target B1+ field was evaluated. Results show that integrated multiring arrays are able to generate homogeneous B1+ field distributions for large FOVs, espe- cially for coronal/sagittal slices, and thus enable body imaging at 7 T with a clinical workflow; however, a low duty cycle or a high SAR is required to achieve homoge- neous B1+ distributions and to exploit the full potential. In conclusion, integrated arrays allow for high element counts that have high degrees of freedom for the pulse optimization but also produce high SARwc , which reduces the SAR accuracy in the VOP compression for low-SAR protocols, leading to a potential reduction in array performance. Smaller SAR overestimations can increase SAR accuracy, but lead to a high number of VOPs, which increases the computational cost for VOP evaluation and makes online SAR monitoring or pulse optimization challenging. Arrays with interleaved rings showed the best results in the study.}, language = {en} } @article{HagemannGeittner1990, author = {Hagemann, Hans-J{\"u}rgen and Geittner, P.}, title = {PCVD hybrid technology for single mode fibres. Hagemann, H. J.; Geittner, P.}, series = {Proceedings : papers presented at: the 8th Annual European Fibre Optic Communications and Local Area Networks Exposition}, journal = {Proceedings : papers presented at: the 8th Annual European Fibre Optic Communications and Local Area Networks Exposition}, pages = {67 -- 72}, year = {1990}, language = {en} } @article{HagemannGeittnerWarnieretal.1986, author = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Warnier, J. and Wilson, H.}, title = {PCVD at high deposition rates. Geittner, P.; Hagemann, H. J.; Warnier, J.; Wilson, H.}, series = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 4 (1986), H. 7}, journal = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 4 (1986), H. 7}, isbn = {0733-8724}, pages = {818 -- 822}, year = {1986}, language = {en} } @article{FerreinBoehnstedtLakemeyer2007, author = {Ferrein, Alexander and B{\"o}hnstedt, Lutz and Lakemeyer, Gerhard}, title = {Options in readylog reloaded -- generating decision-theoretic plan libraries in golog / B{\"o}hnstedt, Lutz ; Ferrein, Alexander ; Lakemeyer, Gerhard}, series = {KI 2007: advances in artificial intelligence : 30th Annual German Conference on AI, KI 2007, Osnabr{\"u}ck, Germany, September 10 - 13, 2007 ; proceedings}, journal = {KI 2007: advances in artificial intelligence : 30th Annual German Conference on AI, KI 2007, Osnabr{\"u}ck, Germany, September 10 - 13, 2007 ; proceedings}, publisher = {Springer}, address = {Berlin}, isbn = {978-3-540-74564-8}, pages = {352 -- 366}, year = {2007}, language = {en} } @article{Benkner1998, author = {Benkner, Thorsten}, title = {Optimum Transmission Power in High Capacity Umbrella Cell Systems}, series = {Multiaccess, mobility and teletraffic : advances in wireless networks ; [proceedings of the Third Workshop on Multiaccess, Mobility and Teletraffic for Personal Communications held in December 1997 in Melbourne, Australia] / ed. by David Everitt ...}, journal = {Multiaccess, mobility and teletraffic : advances in wireless networks ; [proceedings of the Third Workshop on Multiaccess, Mobility and Teletraffic for Personal Communications held in December 1997 in Melbourne, Australia] / ed. by David Everitt ...}, publisher = {Kluwer}, address = {Boston, Mass. [u.a.]}, isbn = {0-7923-8091-6}, pages = {221 -- 232}, year = {1998}, language = {en} } @article{EngelsDoege1998, author = {Engels, Elmar and Doege, E.}, title = {Optimizing the number of strokes for punching machines using a fuzzy controlled electrohydraulic damping system / Doege, E. ; Engels, E.}, series = {ICME 98, CIRP International Seminar on Intelligent Computation in Manufacturing Engineering, Proceedings, Capri, IT, Jul 1-3, 1998}, journal = {ICME 98, CIRP International Seminar on Intelligent Computation in Manufacturing Engineering, Proceedings, Capri, IT, Jul 1-3, 1998}, address = {Capri}, pages = {471 -- 478}, year = {1998}, language = {en} }