TY - CHAP A1 - Staat, Manfred T1 - Limit and shakedown analysis under uncertainty T2 - Proceedings International Conference on Advances in Computational Mechanics (ACOME) Y1 - 2012 N1 - International Conference on Advances in Computational Mechanics (ACOME), August 14-16, 2012, Ho Chi Minh City, Vietnam SP - 837 EP - 861 ER - TY - JOUR A1 - Staat, Manfred T1 - Limit and shakedown analysis under uncertainty JF - Tap chi Khoa hoc & ung dung - Dai hoc Ton Duc Thang Y1 - 2012 N1 - = Journal of Applied Sciences - Ton Duc Thang University VL - 19 SP - 45 EP - 47 ER - TY - JOUR A1 - Staat, Manfred A1 - Trenz, Eva A1 - Lohmann, Philipp A1 - Frotscher, Ralf A1 - Klinge, Uwe A1 - Tabaza, Ruth A1 - Kirschner-Hermanns, Ruth T1 - New measurements to compare soft tissue anchoring systems in pelvic floor surgery JF - Journal of Biomedical Materials Research Part B: Applied Biomaterials N2 - Suburethral slings as well as different meshes are widely used treating stress urinary incontinence and prolaps in women. With the development of MiniSlings and special meshes using less alloplastic material anchorage systems become more important to keep devices in place and to put some tension especially on the MiniSlings. To date, there are many different systems of MiniSlings of different companies on the market which differ in the structure of the used meshes and anchors. A new objective measurement method to compare different properties of MiniSling systems (mesh and anchor) is presented in this article. Ballistic gelatine acts as soft tissue surrogate. Significant differences in parameters like pull-out strength of anchors or shrinkage of meshes under loading conditions have been determined. The form and size of the anchors as well as the structural stability of the meshes are decisive for a proper integration. The tested anchorings sytems showed markedly different mechanical function at their respective load bearing capacity. As the stable fixation of the device in tissue is a prerequisite for a permanet reinforcement, the proposed test system permits further optimisation of anchor and mesh devices to improve the success of the surgical treatment Y1 - 2012 U6 - http://dx.doi.org/10.1002/jbm.b.32654 SN - 1552-4981 VL - 100B IS - 4 SP - 924 EP - 933 PB - Wiley CY - Hoboken, NJ ER - TY - JOUR A1 - Staat, Manfred A1 - Vu, Duc Khoi T1 - Limit analysis of flaws in pressurized pipes and cylindrical vessels Part II: Circumferential defects JF - Engineering Fracture Mechanics ; 97(2013), H. 1 N2 - Upper and lower bound theorems of limit analyses have been presented in part I of the paper. Part II starts with the finite element discretization of these theorems and demonstrates how both can be combined in a primal–dual optimization problem. This recently proposed numerical method is used to guide the development of a new class of closed-form limit loads for circumferential defects, which show that only large defects contribute to plastic collapse with a rapid loss of strength with increasing crack sizes. The formulae are compared with primal–dual FEM limit analyses and with burst tests. Even closer predictions are obtained with iterative limit load solutions for the von Mises yield function and for the Tresca yield function. Pressure loading of the faces of interior cracks in thick pipes reduces the collapse load of circumferential defects more than for axial flaws. Axial defects have been treated in part I of the paper. Y1 - 2012 U6 - http://dx.doi.org/10.1016/j.engfracmech.2012.05.017 SN - 0013-7944 VL - 97 SP - 314 EP - 333 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Stadler, Andreas M. A1 - Garvey, G. J. A1 - Bocahut, A. A1 - Sacquin-Mora, S. A1 - Digel, Ilya A1 - Schneider, G. J. A1 - Natali, F. A1 - Artmann, Gerhard A1 - Zaccai, G. T1 - Thermal fluctuations of haemoglobin from different species : adaptation to temperature via conformational dynamics JF - Journal of the Royal Society Interface N2 - 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 Å 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. Y1 - 2012 U6 - http://dx.doi.org/10.1098/rsif.2012.0364 SN - 1742-5689 VL - 9 IS - 76 SP - 2845 EP - 2855 PB - The Royal Society CY - London ER - TY - CHAP A1 - Streun, M. A1 - Al-Kaddoum, R. A1 - Parl, C. A1 - Pietrzyk, U. A1 - Ziemons, Karl A1 - Waasen, S. van T1 - Simulation studies of optical photons in monolithic block scintillators T2 - 2011 IEEE Nuclear Science Symposium Conference Record (NSS/MIC) N2 - The interest in PET detectors with monolithic block scintillators is growing. In order to obtain high spatial resolutions dedicated positioning algorithms are required. But even an ideal algorithm can only deliver information which is provided by the detector. In this simulation study we investigated the light distribution on one surface of cuboid LSO scintillators of different size. Scintillators with a large aspect ratio (small footprint and large height) showed significant position information only for a minimum interaction depth of the gamma particle. The results allow a quantitative estimate for a useful aspect ratio. Y1 - 2012 SN - 978-1-4673-0120-6 (electronic ISBN) SN - 978-1-4673-0118-3 (print ISBN) U6 - http://dx.doi.org/10.1109/NSSMIC.2011.6154621 SP - 1380 EP - 1382 PB - IEEE CY - New York ER - TY - CHAP A1 - Stroetmann, Richard A1 - Lohse, Wolfram T1 - Stahlbau T2 - Wendehorst Beispiele aus der Baupraxis. - 4. Aufl. Y1 - 2012 SN - 978-3-8348-0999-5 ; 978-3-8348-8229-5 U6 - http://dx.doi.org/10.1007/978-3-8348-8229-5_10 SP - 263 EP - 361 PB - Springer Vieweg CY - Wiesbaden ER - TY - CHAP A1 - Strohmeier, Andreas ED - Vismann, Ulrich T1 - Siedlungswasserwirtschaft T2 - Wendehorst Bautechnische Zahlentafeln Y1 - 2012 SN - 978-3-8348-0960-5 U6 - http://dx.doi.org/10.1007/978-3-8348-8613-2_19 N1 - Kapitel 19 SP - 1393 EP - 1498 PB - Vieweg + Teubner CY - Wiesbaden ET - 34 ER - TY - CHAP A1 - Strohmeier, Andreas T1 - Siedlungswasserwirtschaft T2 - Wendehorst Beispiele aus der Baupraxis. - 4. Aufl. Y1 - 2012 SN - 978-3-8348-0999-5 ; 978-3-8348-8229-5 U6 - http://dx.doi.org/10.1007/978-3-8348-8229-5_16 SP - 527 EP - 566 PB - Springer Vieweg CY - Wiesbaden ER - TY - CHAP A1 - Takenaga, Shoko A1 - Werner, Frederik A1 - Sawada, Kazuaki A1 - Schöning, Michael Josef T1 - Comparison of label-free ACh image sensors based on CCD and LAPS Y1 - 2012 SN - 978-3-9813484-2-2 U6 - http://dx.doi.org/10.5162/IMCS2012/4.2.6 SP - 356 EP - 359 ER - TY - BOOK A1 - Thomas, Axel T1 - Rhetorische Knallfrösche - reloaded : Zitatensammlung für Politik und Wirtschaft Y1 - 2012 PB - Neck + Heyn CY - Aachen ER - TY - BOOK A1 - Timme, Michael T1 - HGB Crashkurs : der sichere Weg durch die Prüfung ; [Gesellschafts- und Wirtschaftsrecht] Y1 - 2012 SN - 978-3-406-63679-0 PB - Beck CY - München ER - TY - BOOK A1 - Timme, Michael T1 - BGB Crashkurs : der sichere Weg durch die Prüfung ; [Fall für Fall durch das Privatrecht]. - 2. Aufl. Y1 - 2012 SN - 978-3-406-63681-3 PB - Beck CY - München ER - TY - JOUR A1 - Timme, Michael T1 - Die Reichweite der "werdenden" Wohnungseigentümergemeinschaft gegenüber dem Zweiterwerb JF - Monatsschrift für Deutsches Recht : MdR N2 - Mit einer aktuellen Entscheidung hat der BGH, Urt. v. 11.5.2012 - V ZR 196/11, MDR 2012, 958 seine Rechtsprechung v. 5.6.2008 - V ZB 85/07 zur Entstehungsphase einer Wohnungseigentümergemeinschaft fortgeführt. In dieser Entscheidung sieht der BGH die Erwerber von Wohnungseigentum als Kostenschuldner gem. § 16 Abs. 2 WEG an, obwohl diese noch nicht im Grundbuch eingetragen sind. Eine andere Rechtslage besteht beim sog. Zweiterwerb. Die Abgrenzung von Erstund Zweierwerb ist aufgrund der völlig unterschiedlichen Rechtsfolgen für die Praxis von großer Bedeutung. Y1 - 2012 U6 - http://dx.doi.org/10.9785/ovs-mdtr-2012-1069 SN - 0340-1812 VL - 2012 IS - 18 SP - 1068 EP - 1071 PB - Verlag Dr. Otto Schmidt CY - Köln ER - TY - JOUR A1 - Timme, Michael A1 - Günnewig, Sebastian T1 - Betriebskostenabrechnung - Die Pflicht des Vermieters zur Beachtung des Wirtschaftlichkeitsgebots JF - Der Miet-Rechts-Berater : MietRB ; Miete, Immobilien, Wohnungseigentum N2 - Mit seiner aktuellen Entscheidung (BGH v. 6.11.2011 – VIII ZR 340/10, MDR 2011, 1095 = MietRB MDR 2011, 337) hat der BGH die Darlegungs- und Beweislast für einen Verstoß gegen das Gebot der Wirtschaftlichkeit bei der Abrechnung von Betriebskosten konkretisiert. Der Beitrag erläutert anhand der Hintergründe des Gebotes der Wirtschaftlichkeit die Konsequenzen für die Praxis. Y1 - 2012 SN - 1612-040X IS - 3 SP - 83 EP - 88 PB - Verlag Dr. Otto Schmidt CY - Köln ER - TY - CHAP A1 - Tran, Thanh Ngoc A1 - Staat, Manfred ED - Eberhardsteiner, J. T1 - A primal-dual shakedown analysis of 3D structures using the face-based smoothed finite element method T2 - Proceedings European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012) Y1 - 2012 N1 - 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012) Vienna, Austria, September 10-14, 2012 ER - TY - BOOK A1 - Uibel, Thomas T1 - Spaltverhalten von Holz beim Eindrehen von selbstbohrenden Holzschrauben Y1 - 2012 SN - 978-3-86644-835-3 N1 - Karlsruhe, Univ., Diss. 2012 - Karlsruher Berichte zum Ingenieurholzbau ; 20 PB - KIT Scientific Publishing CY - Karlsruhe ER - TY - RPRT A1 - Vaeßen, Christiane A1 - Ohme, H. A1 - Manderscheid, D. T1 - Endbericht Projekt Immotherm : Vorhabensbezeichnung: KMU-innovativ-Verbundvorhaben "Einsatz immobilisierter Mikroorganismen zur Entölung und Entsalzung von Kondensatwasser bei hohen Prozesstemperaturen" : Laufzeit des Vorhabens: 01.03.2009-31.08.2011 : Förderkennzeichen: 01LY0816A, 01LY0816B, 01LY0816C Y1 - 2012 ER - TY - JOUR A1 - Verbanella, Stresa A1 - Fabo, Sabine T1 - Mit Pinsel und Farbe hacken : Interview mit Sabine Fabo T1 - Hacking with paint and brush : interview with Sabine Fabo JF - Remotewords.net N2 - Remotewords makes its mark on the picturesque "Bar Verbanella”, located in Stresa near Isola Bella on Lago Maggiore. The words CUM GRANO SALIS (with a grain of salt) by Sabine Fabo, art theorist on media contexts, were applied to its roof in collaboration with the German-Italian art organization "Lo spirito del Lago". KW - Guerrillawerbung KW - Parasitäre Strategie Y1 - 2012 ER - TY - BOOK A1 - Vismann, Ulrich T1 - Wendehorst Bautechnische Zahlentafeln / hrsg. von Ulrich Vismann in Verbindung mit dem DIN Deutsches Institut für Normung e.V. Herwig Baumgartner ... Y1 - 2012 SN - 978-3-8348-0960-5 U6 - http://dx.doi.org/10.1007/978-3-8348-8613-2 PB - Vieweg + Teubner CY - Wiesbaden ET - 34., vollst. überarb. und erw. Aufl. ER - TY - CHAP A1 - Vismann, Ulrich ED - Vismann, Ulrich T1 - Stahlbeton- und Spannbetonbau nach Eurocode 2 T2 - Wendehorst Bautechnische Zahlentafeln N2 - Die bauaufsichtliche Einführung der Eurocodes steht unmittelbar bevor. Für den Bereich des Stahl- und Spannbetonbaus soll die Anwendung zum 1. Juli 2012 verbindlich sein, d. h. mit diesem Stichtag sollte nur noch der Eurocode 2 (DIN EN 1992-1-1, Ausgabe Januar 2011) mit seinem zugehörigen nationalen Anhang (DIN EN 1992-1-1/NA, Ausgabe Januar 2011) Verwendung finden, die DIN 1045-1 wird zurückgezogen. Bereits seit März 2010 gilt eine Übergangsphase, ist der die Anwendung des Eurocodes alternativ zur DIN 1045-1 als bauaufsichtlich gleichwertige Lösung möglich. Y1 - 2012 SN - 978-3-8348-0960-5 U6 - http://dx.doi.org/10.1007/978-3-8348-8613-2_12 N1 - Kapitel 12 SP - 601 EP - 775 PB - Vieweg + Teubner CY - Wiesbaden ET - 34 ER - TY - CHAP A1 - Vismann, Ulrich ED - Vismann, Ulrich T1 - Beton nach DIN 1045-2 T2 - Wendehorst Bautechnische Zahlentafeln Y1 - 2012 SN - 978-3-8348-0960-5 U6 - http://dx.doi.org/10.1007/978-3-8348-8613-2_11 N1 - Kapitel 11 SP - 571 EP - 600 PB - Vieweg + Teubner CY - Wiesbaden ET - 34 ER - TY - CHAP A1 - Vismann, Ulrich T1 - Stahlbetonbau T2 - Wendehorst Beispiele aus der Baupraxis. - 4. Aufl. Y1 - 2012 SN - 978-3-8348-0999-5 ; 978-3-8348-8229-5 U6 - http://dx.doi.org/10.1007/978-3-8348-8229-5_9 SP - 223 EP - 262 PB - Springer Vieweg CY - Wiesbaden ER - TY - BOOK A1 - Vismann, Ulrich T1 - Wendehorst Beispiele aus der Baupraxis / Ulrich Vismann (Hrsg.). - 4., durchges. und aktualis. Aufl. Y1 - 2012 SN - 978-3-8348-0999-5 ; 978-3-8348-8229-5 U6 - http://dx.doi.org/10.1007/978-3-8348-8229-5 PB - Springer Vieweg CY - Wiesbaden ER - TY - JOUR A1 - Wagner, Torsten A1 - Shigiahara, N. A1 - Miyamoto, K. A1 - Suzurikawa, J. A1 - Finger, F. A1 - Schöning, Michael Josef A1 - Yoshinobu, T. T1 - Light-addressable Potentiometric Sensors and Light–addressable Electrodes as a Combined Sensor-and-manipulator Microsystem with High Flexibility JF - Procedia Engineering N2 - This work describes the novel combination of the light-addressable electrode (LAE) and the light-addressable potentiometric sensor (LAPS) into a microsystem set-up. Both the LAE as well as the LAPS shares the principle of addressing the active spot by means of a light beam. This enables both systems to manipulate resp. to detect an analyte with a high spatial resolution. Hence, combining both principles into a single set-up enables the active stimulation e.g., by means of electrolysis and a simultaneous observation e.g., the response of an entrapped biological cell by detection of extracellular pH changes. The work will describe the principles of both technologies and the necessary steps to integrate them into a single set-up. Furthermore, examples of application and operation of such systems will be presented. Y1 - 2012 U6 - http://dx.doi.org/10.1016/j.proeng.2012.09.290 SN - 1877-7058 N1 - Part of special issue "26th European Conference on Solid-State Transducers, EUROSENSOR 2012" IS - 47 SP - 890 EP - 893 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Wagner, Torsten A1 - Werner, Frederik A1 - Miyamoto, Ko-Ichiro A1 - Schöning, Michael Josef A1 - Yoshinobu, Tatsuo T1 - Development and characterisation of a compact light-addressable potentiometric sensor (LAPS) based on the digital light processing (DLP) technology for flexible chemical imaging JF - Sensors and Actuators B: Chemical N2 - Chemical imaging systems allow the visualisation of the distribution of chemical species on the sensor surface. This work represents a new flexible approach to read out light-addressable potentiometric sensors (LAPS) with the help of a digital light processing (DLP) set-up. The DLP, known well for video projectors, consists of a mirror-array MEMS device, which allows fast and flexible generation of light patterns. With the help of these light patterns, the sensor surface of the LAPS device can be addressed. The DLP approach has several advantages compared to conventional LAPS set-ups, e.g., the spot size and the shape of the light pointer can be changed easily and no mechanical movement is necessary, which reduces the size of the set-up and increases the stability and speed of the measurement. In addition, the modulation frequency and intensity of the light beam are important parameters of the LAPS set-up. Within this work, the authors will discuss two different ways of light modulation by the DLP set-up, investigate the influence of different modulation frequencies and different light intensities as well as demonstrate the scanning capabilities of the new set-up by pH mapping on the sensor surface. Y1 - 2012 U6 - http://dx.doi.org/10.1016/j.snb.2010.12.003 SN - 0925-4005 N1 - Part of special issue "Eurosensors XXIV, 2010" VL - 170 SP - 34 EP - 39 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Weigand, Christoph T1 - Statistical Tests Based on Reliability and Precision JF - Economic Quality Control : EQC ; international journal for quality and reliability N2 - The construction of a statistical test is investigated which is based only on “reliability” and “precision” as quality criteria. The reliability of a statistical test is quantifiedin a straightforward way by the probability that the decision of the test is correct. However, the quantification of the precision of a statistical test is not at all evident. Thereforethe paper presents and discusses several approaches. Moreover the distinction of “nullhypothesis” and “alternative hypothesis” is not necessary any longer. Y1 - 2012 U6 - http://dx.doi.org/10.1515/eqc-2012-0002 SN - 1869-6147 VL - 27 IS - 1 SP - 43 EP - 64 PB - De Gruyter CY - Berlin ER - TY - CHAP A1 - Weil, M. A1 - Poghossian, Arshak A1 - Schöning, Michael Josef A1 - Cherstvy, A. T1 - Electrical monitoring of layer-by-layer adsorption of oppositely charged macromolecules by means of capacitive field-effect devices Y1 - 2012 SN - 978-3-9813484-2-2 U6 - http://dx.doi.org/10.5162/IMCS2012/P2.5.2 SP - 1575 EP - 1578 ER - TY - JOUR A1 - Werner, Frederik A1 - Groebel, Simone A1 - Krumbe, Christoph A1 - Wagner, Torsten A1 - Selmer, Thorsten A1 - Yoshinobu, Tatsuo A1 - Baumann, Marcus A1 - Schöning, Michael Josef T1 - Nutrient concentration-sensitive microorganism-based biosensor JF - Physica Status Solidi (a) Y1 - 2012 U6 - http://dx.doi.org/10.1002/pssa.201100801 SN - 1862-6319 VL - 209 IS - 5 SP - 900 EP - 904 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Werner, Frederik A1 - Wagner, Torsten A1 - Miyamoto, Ko-ichiro A1 - Yoshinobu, Tatsuo A1 - Schöning, Michael Josef T1 - High speed and high resolution chemical imaging based on a new type of OLED-LAPS set-up JF - Sensors and Actuators B: Chemical N2 - Light-addressable potentiometric sensors (LAPS) are field-effect-based sensors. A modulated light source is used to define the particular measurement spot to perform spatially resolved measurements of chemical species and to generate chemical images. In this work, an organic-LED (OLED) display has been chosen as a light source. This allows high measurement resolution and miniaturisation of the system. A new developed driving method for the OLED display optimised for LAPS-based measurements is demonstrated. The new method enables to define modulation frequencies between 1 kHz and 16 kHz and hence, reduces the measurement time of a chemical image by a factor of 40 compared to the traditional addressing of an OLED display. Y1 - 2012 U6 - http://dx.doi.org/10.1016/j.snb.2011.12.102 SN - 0925-4005 N1 - Part of special issue "Selected Papers presented at Eurosensors XXV" VL - 175 SP - 118 EP - 122 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Wilke, Thomas T1 - Architekturzeichnung als Instrument der Theoriebildung. Lineamenta vs. Portraicture – Architekturdarstellung zwischen Wissenschaft und Öffentlichkeit. Tagung des DFG-Netzwerks-Schnittstelle Bild in Zusammenarbeit mit dem Lehrstuhl für Kunstgeschichte der Universität Regensburg, 28.4.2012. JF - Kunstchronik Y1 - 2012 SN - 0023-5474 VL - 65 IS - 9/10 SP - 494 EP - 499 PB - Fachverlag Hans Carl CY - Nürnberg ER - TY - JOUR A1 - Wolf, Martin T1 - Von Security Awareness zum Secure Behaviour JF - Hakin9 Extra – IT-Forensik N2 - 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. Y1 - 2012 SN - 1733-7186 VL - 2012 IS - 5 SP - 18 EP - 19 PB - Software Wydawnictwo CY - Warszawa ER - TY - CHAP A1 - Wollert, Jörg T1 - The performance of UWB-communication in an industrial environment T2 - IEEE 1st International Symposium on Wireless Systems : (IDAACS-SWS) : Offenburg, 20-21 Sept. 2012 Y1 - 2012 SN - 978-1-4673-4678-8 U6 - http://dx.doi.org/10.1109/IDAACS-SWS.2012.6377639 SP - 85 EP - 90 PB - IEEE CY - Piscataway, NJ ER - TY - CHAP A1 - Wollert, Jörg A1 - Rau, S. T1 - Performance von embedded WLAN-Systemen bei koexistierenden Netzwerken T2 - KOMMA 2012 : Kommunikation in der Automation : 3. Jahreskolloquium Kommunikation in der Automation : Lemgo, 14.11.2012 / Jürgen Jasperneite ... (Hrsg.) Y1 - 2012 SN - 978-3-9814062-2-1 PB - Inst. für Industrielle Informationstechnik CY - Lemgo ER - TY - CHAP A1 - Wollert, Jörg A1 - Rau, Sebastian T1 - Energietransparenz und optimierter Energieverbrauch durch ganzheitliche Automatisierungskonzepte T2 - Smart Energy 2012 : wie smart ist der Weg zur Energiewende? / Uwe Großmann, Ingo Kunold (Hrsg.) Y1 - 2012 SN - 978-3-86488-030-8 SP - 109 EP - 122 PB - Hülsbusch CY - Glückstadt ER - TY - BOOK A1 - Wosnitza, Franz A1 - Hilgers, Hans Gerd T1 - Energieeffizienz und Energiemanagement : Ein Überblick heutiger Möglichkeiten und Notwendigkeiten Y1 - 2012 SN - 978-3-8348-8671-2 PB - Vieweg + Teubner CY - Wiesbaden ER - TY - BOOK A1 - Wosnitza, Franz A1 - Hilgers, Hans Gerd T1 - Energieeffizienz und Energiemanagement : ein Überblick heutiger Möglichkeiten und Notwendigkeiten Y1 - 2012 SN - 978-3-8348-1941-3 N1 - eISBN 978-3-8348-8671-2 PB - Springer Spektrum CY - Wiesbaden ER - TY - BOOK A1 - Wählisch, Georg T1 - Technisches Zeichnen : Lösungsvorschläge für das Selbststudium. (Berichte aus dem Maschinenbau) Y1 - 2012 SN - 978-3-8440-1159-3 PB - Shaker CY - Aachen ER - TY - JOUR A1 - Yazdanbakhsh, Pedram A1 - Solbach, Klaus A1 - Bitz, Andreas T1 - Variable power combiner for RF mode shimming in 7-T MR imaging JF - IEEE Transaction on Biomedical Engineering N2 - 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. Y1 - 2012 U6 - http://dx.doi.org/10.1109/TBME.2012.2205926 SN - 1558-2531 VL - 59 IS - 9 SP - 2549 EP - 2557 PB - IEEE CY - New York ER - TY - CHAP A1 - Yoshinobu, Tatsuo A1 - Miyamoto, Ko-Ichiro A1 - Wagner, Torsten A1 - Schöning, Michael Josef ED - Yamaguchi, Takami T1 - Miniaturized and high-speed chemical imaging systems T2 - Nano-Biomedical Engineering 2012. Proceedings of the Tohoku University Global Centre of Excellence Programme, Sakura Hall, Tohoku University, Sendai Japan, 5 – 6 March 2012 Y1 - 2012 U6 - http://dx.doi.org/10.1142/9781848169067_0045 SP - 386 EP - 395 PB - World Scientific CY - Singapur ER -