@book{Bassen2012, author = {Bassen, Yasmine}, title = {Internationale Rechnungslegung von Nonprofit-Organisationen}, publisher = {Eul}, address = {Lohmar}, isbn = {978-3-8441-0167-6}, pages = {XXVII, 246 S. : graph. Darst.}, 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} } @article{KobusBitzUdenetal.2012, author = {Kobus, Thiele and Bitz, Andreas and Uden, Mark J. van and Lagemaat, Miram W. and Rothgang, Eva and Orzada, Stephan and Heerschap, Arend and Scheenen, Tom W. J.}, title = {In vivo 31P MR spectroscopic imaging of the human prostate at 7 T: safety and feasibility}, series = {Magnetic Resonance in Medicine}, volume = {68}, journal = {Magnetic Resonance in Medicine}, number = {6}, publisher = {Wiley-Liss}, address = {New York}, issn = {1522-2594}, doi = {10.1002/mrm.24175}, pages = {1683 -- 1695}, year = {2012}, abstract = {31P MR spectroscopic imaging of the human prostate provides information about phosphorylated metabolites that could be used for prostate cancer characterization. The sensitivity of a magnetic field strength of 7 T might enable 3D 31P MR spectroscopic imaging with relevant spatial resolution in a clinically acceptable measurement time. To this end, a 31P endorectal coil was developed and combined with an eight-channel 1H body-array coil to relate metabolic information to anatomical location. An extensive safety validation was performed to evaluate the specific absorption rate, the radiofrequency field distribution, and the temperature distribution of both coils. This validation consisted of detailed Finite Integration Technique simulations, confirmed by MR thermometry and Burn:x-wiley:07403194:media:MRM24175:tex2gif-stack-1 measurements in a phantom and in vivo temperature measurements. The safety studies demonstrated that the presence of the 31P endorectal coil had no influence on the specific absorption rate levels and temperature distribution of the external eight-channel 1H array coil. To stay within a 10 g averaged local specific absorption rate of 10 W/kg, a maximum time-averaged input power of 33 W for the 1H array coil was allowed. For transmitting with the 31P endorectal coil, our safety limit of less than 1°C temperature increase in vivo during a 15-min MR spectroscopic imaging experiment was reached at a time-averaged input power of 1.9 W. With this power setting, a second in vivo measurement was performed on a healthy volunteer. Using adiabatic excitation, 3D 31P MR spectroscopic imaging produced spectra from the entire prostate in 18 min with a spatial resolution of 4 cm3. The spectral resolution enabled the separate detection of phosphocholine, phosphoethanolamine, inorganic phosphate, and other metabolites that could play an important role in the characterization of prostate cancer.}, language = {en} } @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} } @article{KrollLudwigs2012, author = {Kroll-Ludwigs, Kathrin}, title = {Ein optionales Vertragsrecht f{\"u}r Europa: Motor oder Hemmnis f{\"u}r den Binnenmarkt?}, series = {GPR : Zeitschrift f{\"u}r Gemeinschaftsprivatrecht}, volume = {9}, journal = {GPR : Zeitschrift f{\"u}r Gemeinschaftsprivatrecht}, number = {4}, publisher = {Verlag Dr. Otto Schmidt}, address = {K{\"o}ln}, issn = {2193-9519}, doi = {10.1515/gpr.2012.9.4.181}, pages = {181 -- 188}, year = {2012}, language = {de} } @article{ChludekTran2012, author = {Chludek, Astrid and Tran, Duc Hung}, title = {Der Reformvorschlag des IAS 12 gem. ED/2009/2 - Ein Pl{\"a}doyer f{\"u}r die Einf{\"u}hrung der valuation allowance}, series = {KoR Zeitschrift f{\"u}r kapitalmarktorientierte Rechnungslegung}, journal = {KoR Zeitschrift f{\"u}r kapitalmarktorientierte Rechnungslegung}, number = {1}, publisher = {Fachmedien Otto Schmidt}, address = {D{\"u}sseldorf}, issn = {1617-8084}, pages = {4 -- 8}, year = {2012}, language = {de} } @article{HerzwurmKramsPietschetal.2012, author = {Herzwurm, Georg and Krams, Benedikt and Pietsch, Wolfram and Schockert, Sixten}, title = {Report from the 3rd international workshop on requirements prioritization for customer oriented software development (RePriCo'12)}, series = {ACM SIGSOFT Software Engineering Notes}, volume = {37}, journal = {ACM SIGSOFT Software Engineering Notes}, number = {4}, publisher = {Association for Computing Machinery}, address = {New York}, issn = {0163-5948}, doi = {10.1145/2237796.2237817}, pages = {32 -- 34}, year = {2012}, abstract = {Prioritization is an essential task within requirements engineering to cope with complexity and to establish focus properly. The 3rd Workshop on Requirements Prioritization for customer oriented Software Development (RePriCo'12) focused on requirements prioritization and adjacent themes in the context of customer oriented development of bespoke and standard software. Five submissions have been accepted for the proceedings and for presentation. The report summarizes and points out key findings.}, language = {en} } @incollection{FruehwaldPetersonHasenstab2012, author = {Fr{\"u}hwald, Katja and Peterson, Leif Arne and Hasenstab, Andreas}, title = {Pr{\"u}fverfahren zur Begutachtung der Materialeigenschaften von Holztragwerken}, series = {Bauphysik-Kalender 2012: Schwerpunkt: Geb{\"a}udediagnostik}, booktitle = {Bauphysik-Kalender 2012: Schwerpunkt: Geb{\"a}udediagnostik}, editor = {Fouad, Nabil A.}, publisher = {Ernst \& Sohn}, address = {Berlin}, isbn = {9783433029862 (Print)}, doi = {10.1002/9783433601235.ch4}, pages = {103 -- 155}, year = {2012}, abstract = {Dieses Kapitel beinhaltet: - Einleitung - Ausgew{\"a}hlte typische Sch{\"a}den an Holzbauwerken - Das Material Holz und seine Besonderheiten - Bestandserfassung - Labormethoden - Begutachtungsbeispiele - Zusammenfassung und Schlussfolgerungen - Literatur}, language = {de} } @misc{OPUS4-7863, title = {Dimensionen 2-2012 : Magazin der FH Aachen University of Applied Sciences}, address = {Aachen}, organization = {FH Aachen, University of Applied Sciences}, pages = {88 S.}, year = {2012}, abstract = {Thema 06 Alles ist jetzt | Zeit ist f{\"u}r uns allgegenw{\"a}rtig, sie bestimmt unser Leben. Eine kurze Reise in die Geschichte der Zeit. 10 Raumfahrt-Visionen von einst und heute | 25. Raumfahrtkolloquium des Fachbereichs Luft- und Raumfahrttechnik 12 Aufbruch in eine neue Welt | Essay von Prof. Dr. h.c. Jesco Freiherr von Puttkamer zum 100. Geburtstag von Wernher von Braun 16 Gesucht: Ein Impfstoff gegen Krebs | Prof. Dr. Peter {\"O}hlschl{\"a}ger forscht an Impfstoffen, die die Ausbreitung von Krebs bek{\"a}mpfen sollen 18 Gesichter der Zukunft | An der FH kommen menschen{\"a}hnliche Roboter zum Einsatz, die sogar Fußball spielen k{\"o}nnen 20 Sicher in der Luft | FH Aachen entwickelt mit der Sinn Spezialuhren GmbH technischen Standard f{\"u}r Fliegeruhren 24 Der „Eismaulwurf" gr{\"a}bt sich durch die Schweiz | IceMole soll bei der Untersuchung von unterirdischen Gletscherseen helfen Studium 26 Benzin im Blut | {\"U}ber die Arbeit im Aixtreme-Racing-Team hat Michael Roeske den Weg zu BMW Motorsport gefunden 28 Hervorragende Perspektiven | Duale Studieng{\"a}nge in Kooperation mit der Handwerkskammer 30 Frei wie ein Vogel | 24 Studierende lernen die Grundlagen des Segelfliegens kennen 32 Vom Autow{\"a}scher zum Ingenieur | Karriere mit f{\"u}nf Sternen 33 Miteinander arbeiten, praktisch {\"u}berzeugen | Das Projekt pro8 fordert Teamf{\"a}higkeit, Zeitmanagement, Pr{\"a}sentationstechniken und Fachwissen 34 Willkommene F{\"o}rderung | Studiengang Scientific Programming erh{\"a}lt Stiftungsprofessur 35 Von Zeltd{\"a}chern und Strohhalmen | Wettbewerb zur Erweiterung des CHIO-Gel{\"a}ndes 36 Mehr B{\"u}rgerbeteiligung in der St{\"a}dteregion | FH-Studentinnen entwickeln gemeinsam mit Prof. Dr. Claudia Mayer das Konzept 37 Ferngesteuertes Labor | Studierende k{\"o}nnen jetzt von zu Hause aus an Antriebs- und Steuerungskomponenten arbeiten 38 Der Koloss von J{\"u}lich | Teilnehmer der 27. Summer School Renewable Energy besuchen den Solarturm in J{\"u}lich 40 Meldungen/Studium International 42 Fliegende Ingenieure | Studium Luft- und Raumfahrttechnik wird mit einer Ausbildung zum Verkehrspiloten verkn{\"u}pft 44 Arbeitstagung Internationalisierung | Grenz{\"u}berschreitende Zusammenarbeit wird an der FH weiter ausgebaut 45 Meldungen/ International Benzin im Blut | Schon als Kind war Michael Roeske motorsportverr{\"u}ckt. {\"U}ber die Arbeit im Aixtreme-RacingTeam hat er den Weg zu BMW Motorsport gefunden FORSCHUNG UND TRANSFER 46 Der Hamster, der 1958 starb und Sp{\"u}rnase wurde | Der FH-Doktorand Ulrich Bohrn arbeitet mit lebenden Zellen 48 Leuchtende Weltneuheit | FH-Wissenschaftler entwickeln quecksilberfreie Energiesparlampe 50 Zellen erinnern sich | FH-Professor entdeckt neuen Effekt bei der Untersuchung roter Blutk{\"o}rperchen 52 Provokation allein reicht nicht mehr | Prof. Dr. Sabine Fabo erforscht die Arbeit moderner K{\"u}nstler 54 FH und LKA gemeinsam gegen Computerkriminalit{\"a}t | Neue Strategien zur Pr{\"a}vention und zur Strafverfolgung 55 Meldungen/Forschung und Transfer Personen 56 Der Tiger und sein Meister | Interview mit dem Aachener K{\"u}nstler Eric Peters 60 Interessen vereinigen | Honorarkonsulin Prof. Dr. Christiane Vaeßen setzt sich f{\"u}r grenz{\"u}berschreitende Kooperation ein 61 Die zwei Seelen | FH-Absolventin Monika Koch hat sich in der Region etabliert 62 Die FH Aachen trauert um Prof. Dr. Rolf-Dietmar Grap 63 Ein Mann der ersten Stunde | Die FH Aachen trauert um Kanzler a. D. Peter Michael Reusch 64 Neue Dekane treten ihr Amt an | Sechs der zehn FH-Fachbereiche stehen unter neuer Leitung 65 Mitglieder des Senats und der Fachbereichsr{\"a}te 68 Lehrpreis 2012, Lehrpr{\"a}mien 2011/12 69 Dienstjubil{\"a}en, B{\"u}cher /Neuauflagen 70 Neuberufene Professoren 71 Meldungen/Personen SERVICE 72 Platz f{\"u}r 1000 Studierende | Neues H{\"o}rsaalgeb{\"a}ude in der Eupener Straße feierlich er{\"o}ffnet 74 Der Blick geht nach vorn | FH peilt die Reauditierung als „familiengerechte Hochschule" an 75 So sch{\"o}n kann Helfen sein | „Menschen f{\"u}r Menschen"- Botschafterin Sara Nuru zu Gast an der FH 76 Wie w{\"a}rs mit MINT? | Die Wanderausstellung „Technik ist weiblich" begeistert M{\"a}dchen f{\"u}r Naturwissenschaften 77 Preis f{\"u}r Technologietransfer | TeTRRA-Projekt zeichnet FH-Absolventen aus 78 Meldungen/Service, Messen und Veranstaltungen 86 Ortswechsel /Zeitreise per Rad 87 Impressum}, language = {de} } @inproceedings{Butenweg2012, author = {Butenweg, Christoph}, title = {Eurocode 8 : Erdbebenauslegung von Tragwerken}, series = {Eurocodes 2012 kompakt - Chancen nutzen : 36. Darmst{\"a}dter Massivbauseminar Zukunftsf{\"a}higes Planen und Bauen, 7. und 8. M{\"a}rz}, booktitle = {Eurocodes 2012 kompakt - Chancen nutzen : 36. Darmst{\"a}dter Massivbauseminar Zukunftsf{\"a}higes Planen und Bauen, 7. und 8. M{\"a}rz}, publisher = {Freunde des Inst. f{\"u}r Massivbau der TU}, address = {Darmstadt}, organization = {Darmst{\"a}dter Massivbauseminar <36, 2012>}, pages = {257 -- 272}, year = {2012}, language = {de} } @incollection{KuhlmannButenwegMeskourisetal.2012, author = {Kuhlmann, Wolfram and Butenweg, Christoph and Meskouris, Konstantin and Kempen, Thomas}, title = {Simulation des Tragverhaltens des Aachener Doms im Erdbebenfall}, series = {Die karolingische Pfalzkapelle in Aachen : Material, Bautechnik, Restaurierung. (Arbeitshefte der rheinischen Denkmalpflege ; 78)}, booktitle = {Die karolingische Pfalzkapelle in Aachen : Material, Bautechnik, Restaurierung. (Arbeitshefte der rheinischen Denkmalpflege ; 78)}, publisher = {Wernersche Verlags-Gesellschaft}, address = {Worms}, isbn = {978-3-88462-325-1}, pages = {237 -- 248}, year = {2012}, language = {de} } @incollection{ButenwegRoeser2012, author = {Butenweg, Christoph and Roeser, W.}, title = {Erdbebenbemessung von Stahlbetontragwerken nach DIN EN 1998-1}, series = {Stahlbetonbau aktuell : Praxishandbuch}, booktitle = {Stahlbetonbau aktuell : Praxishandbuch}, publisher = {Beuth}, address = {Berlin}, isbn = {978-3-410-21932-3 (Print) ; 978-341-02193-3-0 (E-Book)}, pages = {A.1 -- A.43}, year = {2012}, language = {de} } @article{StadlerGarveyBocahutetal.2012, author = {Stadler, Andreas M. and Garvey, G. J. and Bocahut, A. and Sacquin-Mora, S. and Digel, Ilya and Schneider, G. J. and Natali, F. and Artmann, Gerhard and Zaccai, G.}, title = {Thermal fluctuations of haemoglobin from different species : adaptation to temperature via conformational dynamics}, series = {Journal of the Royal Society Interface}, volume = {9}, journal = {Journal of the Royal Society Interface}, number = {76}, publisher = {The Royal Society}, address = {London}, issn = {1742-5689}, doi = {10.1098/rsif.2012.0364}, pages = {2845 -- 2855}, year = {2012}, abstract = {Thermodynamic stability, configurational motions and internal forces of haemoglobin (Hb) of three endotherms (platypus, Ornithorhynchus anatinus; domestic chicken, Gallus gallus domesticus and human, Homo sapiens) and an ectotherm (salt water crocodile, Crocodylus porosus) were investigated using circular dichroism, incoherent elastic neutron scattering and coarse-grained Brownian dynamics simulations. The experimental results from Hb solutions revealed a direct correlation between protein resilience, melting temperature and average body temperature of the different species on the 0.1 ns time scale. Molecular forces appeared to be adapted to permit conformational fluctuations with a root mean square displacement close to 1.2 {\AA} at the corresponding average body temperature of the endotherms. Strong forces within crocodile Hb maintain the amplitudes of motion within a narrow limit over the entire temperature range in which the animal lives. In fully hydrated powder samples of human and chicken, Hb mean square displacements and effective force constants on the 1 ns time scale showed no differences over the whole temperature range from 10 to 300 K, in contrast to the solution case. A complementary result of the study, therefore, is that one hydration layer is not sufficient to activate all conformational fluctuations of Hb in the pico- to nanosecond time scale which might be relevant for biological function. Coarse-grained Brownian dynamics simulations permitted to explore residue-specific effects. They indicated that temperature sensing of human and chicken Hb occurs mainly at residues lining internal cavities in the β-subunits.}, language = {en} } @book{MeskourisButenwegHolleretal.2012, author = {Meskouris, Konstantin and Butenweg, Christoph and Holler, Stefan and Hake, Erwin}, title = {Baustatik in Beispielen}, edition = {2., bearb. Aufl.}, publisher = {Springer}, address = {Heidelberg ; Dordrecht ; London ; New York}, isbn = {978-3-642-23529-0 (Print) ; 978-3-642-23530-6 (E-Book)}, pages = {XI, 431 S.}, year = {2012}, language = {de} } @incollection{DigelMansurovBiisenbaevetal.2012, author = {Digel, Ilya and Mansurov, Zulkhair and Biisenbaev, Makhmut and Savitskaya, Irina and Kistaubaeva, Aida and Akimbekov, Nuraly S. and Zhubanova, Azhar}, title = {Heterogeneous Composites on the Basis of Microbial Cells and Nanostructured Carbonized Sorbents}, series = {Composites and Their Applications}, booktitle = {Composites and Their Applications}, editor = {Hu, Ning}, publisher = {Intech}, address = {London}, isbn = {978-953-51-0706-4}, doi = {10.5772/47796}, pages = {249 -- 272}, year = {2012}, abstract = {The fact that microorganisms prefer to grow on liquid/solid phase surfaces rather than in the surrounding aqueous phase was noticed long time ago [1]. Virtually any surface - animal, mineral, or vegetable - is a subject for microbial colonization and subsequent biofilm formation. It would be adequate to name just a few notorious examples on microbial colonization of contact lenses, ship hulls, petroleum pipelines, rocks in streams and all kinds of biomedical implants. The propensity of microorganisms to become surface-bound is so profound and ubiquitous that it vindicates the advantages for attached forms over their free-ranging counterparts [2]. Indeed, from ecological and evolutionary standpoints, for many microorganisms the surface-bound state means dwelling in nutritionally favorable, non-hostile environments [3]. Therefore, in most of natural and artificial ecosystems surface-associated microorganisms vastly outnumber organisms in suspension and often organize into complex communities with features that differ dramatically from those of free cells [4].}, language = {en} } @incollection{BorggrafeOhndorfDachwaldetal.2012, author = {Borggrafe, Andreas and Ohndorf, Andreas and Dachwald, Bernd and Seboldt, Wolfgang}, title = {Analysis of interplanetary solar sail trajectories with attitude dynamics}, series = {Dynamics and Control of Space Systems 2012}, booktitle = {Dynamics and Control of Space Systems 2012}, publisher = {Univelt Inc}, address = {San Diego}, isbn = {978-0-87703-587-9}, pages = {1553 -- 1569}, year = {2012}, abstract = {We present a new approach to the problem of optimal control of solar sails for low-thrust trajectory optimization. The objective was to find the required control torque magnitudes in order to steer a solar sail in interplanetary space. A new steering strategy, controlling the solar sail with generic torques applied about the spacecraft body axes, is integrated into the existing low-thrust trajectory optimization software InTrance. This software combines artificial neural networks and evolutionary algorithms to find steering strategies close to the global optimum without an initial guess. Furthermore, we implement a three rotational degree-of-freedom rigid-body attitude dynamics model to represent the solar sail in space. Two interplanetary transfers to Mars and Neptune are chosen to represent typical future solar sail mission scenarios. The results found with the new steering strategy are compared to the existing reference trajectories without attitude dynamics. The resulting control torques required to accomplish the missions are investigated, as they pose the primary requirements to a real on-board attitude control system.}, language = {en} } @inproceedings{AlexopoulosKluczkaVaessenetal.2012, author = {Alexopoulos, Spiros and Kluczka, Sven and Vaeßen, Christiane and Roeb, M. and Neises, M.}, title = {Scenario development for efficient methanol production using CO2 and solar energy}, series = {Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012}, booktitle = {Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012}, address = {Rijeka}, pages = {ID 99}, year = {2012}, language = {en} } @misc{BagheriDahmann2012, author = {Bagheri, Mohsen and Dahmann, Peter}, title = {Kletterroboter mit Gurtantrieb international [Offenlegungsschrift]}, publisher = {Deutsches Patentamt / Europ{\"a}isches Patentamt / WIPO / USPTO}, address = {M{\"u}nchen / Den Hague / Genf / Alexandria, Virginia}, pages = {1 -- 20}, year = {2012}, language = {de} } @inproceedings{Staat2012, author = {Staat, Manfred}, title = {Limit and shakedown analysis under uncertainty}, series = {Proceedings International Conference on Advances in Computational Mechanics (ACOME)}, booktitle = {Proceedings International Conference on Advances in Computational Mechanics (ACOME)}, pages = {837 -- 861}, year = {2012}, language = {de} } @article{LoebSchartnerDachwaldetal.2012, author = {Loeb, Horst Wolfgang and Schartner, Karl-Heinz and Dachwald, Bernd and Ohndorf, Andreas and Seboldt, Wolfgang}, title = {Interstellar heliopause probe}, series = {Труды МАИ}, journal = {Труды МАИ}, number = {60}, publisher = {Moskauer Staatliches Luftfahrtinstitut (МАИ)}, address = {Moskau}, pages = {2 -- 2}, year = {2012}, abstract = {There is common agreement within the scientific community that in order to understand our local galactic environment it will be necessary to send a spacecraft into the region beyond the solar wind termination shock. Considering distances of 200 AU for a new mission, one needs a spacecraft traveling at a speed of close to 10 AU/yr in order to keep the mission duration in the range of less than 25 yrs, a transfer time postulated by European Space Agency (ESA). Two propulsion options for the mission have been proposed and discussed so far: the solar sail propulsion and the ballistic/radioisotope-electric propulsion (REP). As a further alternative, we here investigate a combination of solar-electric propulsion (SEP) and REP. The SEP stage consists of six 22-cms diameter RIT-22 ion thrusters working with a high specific impulse of 7377 s corresponding to a positive grid voltage of 5 kV. Solar power of 53 kW at begin of mission (BOM) is provided by a lightweight solar array.}, language = {en} }