TY  - CHAP
A1  - Engels, Elmar
A1  - Gabler, Thomas
T1  - Universelle Programmierschnittstelle für Motion-Logic Systeme : Struktur, Funktionen und Anwendung in der Forschung und Lehre
N2  - Mit freundlicher Genehmigung der Autoren und des Oldenbourg Industrieverlags https://www.oldenbourg-industrieverlag.de/de/9783835633223-33223 erschienen als Beitrag im Tagungsband zur AALE-Tagung 2012. 9. Fachkonferenz 4.-5. Mai 2012, Aachen, Fachhochschule. ISBN 9783835633223 S 2-1 S. 37-46 Original-Abstract der Autoren: "Dieser Artikel beschreibt eine universelle Programmierschnittstelle zur Entwicklung von Motion-Logic Applikationen für industrielle Motion-Controller. Sie ermöglicht die Entwicklung von Software mit modernen Hochsprachen, wie C/C++. Visual Basic, C#, Java, Objective-Cund visuellen Programmiersprachen, wie LabVIEW in Koexistenz mit klassischen Programmiersprachen für speicherprogrammierbare Steuerungen nach IEC 61131-3. Daraus ergeben sich neue Möglichkeiten industrielle Antriebs- und Steuerungssysteme mit ihrem IT-Umfeld zu verbinden."
KW  - Speicherprogrammierte Steuerung
KW  - Motion-Logic System
KW  - SPS
KW  - IndraMotion
Y1  - 2012
ER  - 
TY  - CHAP
A1  - Engels, Elmar
A1  - Luszczynski, Kai
T1  - Vergleichende Untersuchung zur Topologie von zelloptimalen, elektromobilitäts-optimierten Ladungsausgleichsvorrichtungen
N2  - Mit freundlicher Genehmigung der Autoren und des Oldenbourg Industrieverlags https://www.oldenbourg-industrieverlag.de/de/9783835633223-33223 erschienen als Beitrag im Tagungsband zur AALE-Tagung 2012. 9. Fachkonferenz 4.-5. Mai 2012, Aachen, Fachhochschule. ISBN 9783835633223 S 6-2. S. 165-174 Zusammenfassung der Autoren: "Abschließend kann festgehalten werden, dass die gesamten durchgeführten Überlegungen von den Messergebnissen der Inbetriebnahme positiv bestätigt werden. Es wird durch diese Topologie eine maximale Systemverfügbarkeit garantiert und die Zellen werden optimal betrieben. Ein Blick in die Zukunft für dieses Projekt zeigt viele Erweiterungs- und Optimierungsaufgaben. So muss der DC/DC-Wandler für einen bidirektionalen Betrieb erweitert werden, um einen Rekuperationsbetrieb zu gewährleisten bzw. die Zellen laden zu können. Dadurch können gleichzeitig die Gleichrichterdioden im Sekundärleistungsteil durch IGBTs oder MOSFETs ersetzt werden. Die voll funktionsfähige Version des DC/DC-Wandlers könnte höchstwahrscheinlich direkt auf die Anschlusspole der Zelle montiert werden, wodurch das Gewicht gesenkt wird. Durch die verringerte Verlustleistung in den Zuleitungen könnte der Wirkungsgrad noch einmal gesteigert werden.
KW  - Gleichspannungswandler
Y1  - 2012
ER  - 
TY  - CHAP
A1  - Kallweit, Stephan
T1  - Pandaboard, TurtleBot, Kinect und Co. : Low-Cost Hardware im Lehreinsatz für die mobile Robotik.
N2  - Mit freundlicher Genehmigung der Autoren und des Oldenbourg Industrieverlags https://www.oldenbourg-industrieverlag.de/de/9783835633223-33223 erschienen als Beitrag im Tagungsband zur AALE-Tagung 2012. 9. Fachkonferenz 4.-5. Mai 2012, Aachen, Fachhochschule. ISBN 9783835633223 S 8-1 S. 229-238 Original-Abstract des Autors: "Die mobile Robotik wird durch den Einsatz von Low-Cost Hardware einem breiten Publikum zugänglich. Bis vor kurzem basierte eine erschwingliche Hardware meist auf Mikrocontrollern mit den entsprechenden Leistungseinschränkungen z.B. im Bereich der Bildverarbeitung. Die Wahrnehmung einer 3D-Umgebung und somit die Möglichkeit zur autonomen Navigation wurde mit relativ kostenintensiver Hardware, z.B. Stereo-Vision-Systemen und Laserscannern gelöst. Die zur Auswertung der Sensorik notwendige Rechenleistung stand - entweder aufgrund des Stromverbrauchs oder der Performance meist für mobile Plattformen (lokal) - nicht zur Verfügung. Durch Einsatz von leistungsfähigen Prozessoren aus dem Bereich der Mobilgeräte (Smartphones, Tablets) und neuartigen Sensoren des Consumer-Bereichs, wie der Kinect, können mobile Roboter kostengünstig für den Einsatz in der Lehre aufgebaut werden.
KW  - Robotik
KW  - mobile robots
Y1  - 2012
ER  - 
TY  - CHAP
A1  - Hoepner, Gert
T1  - Jurorenstatement - Junioren zeigen sich aggressiv
N2  - Statement zu den Einreichung des DDP 2008
KW  - Deutscher Direktmarketing-Verband
KW  - Deutscher Dialogmarketing-Preis
KW  - Direktmarketing
Y1  - 2008
ER  - 
TY  - CHAP
A1  - Mertens, Josef
T1  - Laminar leading edges: manufacturing, contamination, and operational aspects - results from the German RaWid programme
N2  - RaWid was the German national technology programme on transonic aerodynamics and supporting technologies, lasting from 1995 to 1998. One of the main topics was laminar wing development. Besides aerodynamic design work, many operational aspects were investigated. A manufacturing concept was developed to be applied to operational laminar wings and empennages. It was built in a large scale manufacturing demonstrator with the aerodynamic shape of a 1,5 m section of the A320 fin nose. Tolerances in shape and roughness fulfilled all requirements. The construction can easily be adapted to varying stiffness and strength requirements. Weight and manufacturing costs are comparable to common nose designs. The mock-up to be designed in ALTTA is based on this manufacturing principle. Another critical point is contamination of suction surfaces. Several tests were performed to investigate perforated titanium suction surfaces at realistic operational conditions: - a one year flight test with a suction plate in the stagnation area of the Airbus "Beluga" - a one year test of several suction plates in a ground test near the airport - a one year test of a working suction ground test installation at all weather conditions. No critical results were found. There is no long term suction degradation visible. Icing conditions and ground de-icing fluids used on airports did not pose severe problems. Some problems detected require only respection of weak design constraints.
KW  - Laminare Strömung
KW  - Ansaugsystem
KW  - Profilumströmung
KW  - Laminarprofil
KW  - RaWid
KW  - hybrid laminar flow
KW  - suction systems
KW  - suction structure
KW  - contamination
KW  - operational aspects
Y1  - 2000
ER  - 
TY  - CHAP
A1  - Kern, Alexander
A1  - Dikta, Gerhard
T1  - Probability of damage of electrical and electronic systems due to indirect lightning flashes - investigation of data from German insurance companies
N2  - In the presented paper data collected from the field related to damage statistics of electrical and electronic apparatus in household are reported and investigated. These damages (total number approx. 74000 cases), registered by five German insurance companies in 2005 and 2006, were adviced by customers as caused by lightning overvoltages. With the use of stochastical methods it is possible, to reasses the collected data and to distinguish between cases, which are with high probability caused by lightning overvoltages, and those, which are not. If there was an indication for a direct strike, this case was excluded, so the focus was only on indirect lightning flashes, i.e. only flashes to ground near the structure and flashes to or nearby an incoming service line were investigated. The data from the field contain the location of damaged apparatus (residence of the policy holder) and the distances of the nearest cloud-to-ground stroke to the location of the damage registered by the German lightning location network BLIDS at the date of damage. The statistical data along with some complementary numerical simulations allow to verify the correspondence of the Standards rules used for IEC 62305-2 with the field data and to define some correction needs. The results could lead to a better understanding whether a damage reported to an insurance company is really caused by indirect lightning, or not.
KW  - Blitzschutz
KW  - lightning flash
Y1  - 2009
ER  - 
TY  - CHAP
A1  - Kern, Alexander
A1  - Beierl, Ottmar
A1  - Zischank, Wolfgang
T1  - Calculation of the separation distance according to IEC 62305-3: 2006-10 - Remarks for the application and simplified methods
N2  - [Paper of the X International Symposium on Lightning Protection 9th - 13th November, 2009 - Curitiba, Brazil. 6 pages] The international standard IEC 62305-3, published in 2006, requires as an integral part of the lightning protection system (LPS) the consideration of a separation distance between the conductors of the LPS and metal and electrical installations inside the structure to be protected. IEC 62305-3 gives two different methods for this calculation: a standard, simplified approach and a more detailed approach, which differ especially regarding the treatment of the current sharing effect on the LPS conductors. Hence, different results for the separation distance are possible, leading to some discrepancies in the use of the standard. The standard approach defined in the main part (Clause 6.3) and in Annex C of the standard in some cases may lead to a severe oversizing of the required separation distance. The detailed approach described in Annex E naturally gives more correct results. However, a calculation of the current sharing amongst all parts of the air-termination and downconductor network is necessary, in many cases requiring the use of network analysis programs. In this paper simplified methods for the assessment of the current sharing are presented, which are easy to use as well as sufficiently adequate.
KW  - Blitzschutz
KW  - Lightning protection
Y1  - 2009
N1  - Paper in: [10. International Symposium on Lightning Protection 9. 13. November 2009, Curitiba, Brasilien. 6 Seiten]
ER  - 
TY  - CHAP
A1  - Behrens, Jörg
A1  - Frentzel, Ralf
A1  - Kern, Alexander
T1  - Simulation der transienten Spannungsverläufe im Eigenbedarfsnetz eines Großkraftwerks bei einem kraftwerksnahen Blitzeinschlag in die Hochspannungs-Freileitung
T1  - Simulation of transient voltage curve of a house-load operation net-work of large power plant by a lightning strike in a high-voltage over-head line closed to the power plant
N2  - 8. VDE/ABB-Blitzschutztagung, 29. - 30. Oktober 2009 in Neu-Ulm. Blitzschutztagung <8, 2009, Neu-Ulm> Berlin : VDE Verl. 2009 Großkraftwerke können durch Blitzentladungen mit potentiellen Auswirkungen auf deren Verfügbarkeit und Sicherheit gefährdet werden. Ein sehr spezielles Szenario, welches aus aktuellem Anlass zu untersuchen war, betrifft den kraftwerksnahen Blitzeinschlag in die Hochspannungs-Freileitung am Netzanschluss der Anlage. Wird nun noch ein sogenannter Schirmfehler unterstellt, d.h. der direkte Blitzeinschlag erfolgt in ein Leiterseil des Hoch- bzw. Höchstspannungsnetzes und nicht in das darüber gespannte Erdseil, so bedeutet dies eine extreme elektromagnetische Einwirkung. Der vorliegende Beitrag befasst sich mit der Simulation eines solchen Blitzeinschlages und dessen Auswirkungen auf den Netzanschluss und die Komponenten der elektrischen Eigenbedarfsanlagen eines Kraftwerks auf den unterlagerten Spannungsebenen. Die dabei gewonnenen Erkenntnisse lassen sich ohne Einschränkungen auf Industrieanlagen mit Mittelspannungs-Netzanschluss und ohne eigener Stromversorgung übertragen.
N2  - Lightning discharge can endanger large power plants with potential influence on their availability and reliability. A very special scenario, which was currently to analyse, is the lightning strike close to the high-voltage overhead line at the grid of the power plant. Supposing a failure of shielding and that the lightning strike goes directly into the line then the elec-tromagnetic effect is extremely high. The following article gives attention to the simulation of lightning strike and their effects to the connection with the grid and the components of the house-load operation of a large power plant especially to the lower voltage level sections. These results are transferable to industrial plants which have no own power supply.
KW  - Blitzschutz
KW  - Blitzeinschlag
KW  - lightning strike
Y1  - 2009
SN  - 978-3-8007-3197-8
ER  - 
TY  - CHAP
A1  - Schöning, Michael Josef
A1  - Abdelghani, Adnane
T1  - Advancements in Nanotechnology and Microelectronics (ANM '09) <2009, Tunisia>: Proceedings book ; Tunisia, November, 13 & 14, 2009 / Humboldt Kolleg. Ed. by Michael J. Schöning ; Adnane Abdelghani
N2  - The ANM’09 multi-disciplinary scientific program includes topics in the fields of "Nanotechnology and Microelectronics" ranging from "Bio/Micro/Nano Materials and Interfacing" aspects, "Chemical and Bio-Sensors", "Magnetic and Superconducting Devices", "MEMS and Microfluidics" over "Theoretical Aspects, Methods and Modelling" up to the important bridging "Academics meet Industry".
KW  - Nanopartikel
KW  - Biosensor
KW  - Supraleiter
KW  - MEMS
KW  - Biophoton
KW  - Nanotechnology ; Microelectronics ; Biosensors ; Superconductor ; MEMS
Y1  - 2009
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-3113
ER  - 
TY  - CHAP
A1  - Roderburg, Katharina
A1  - Schöning, Michael Josef
T1  - 1. Graduierten-Tagung : 9. September 2008 / [Hrsg.: K. Roderburg ; M. J. Schöning]
T1  - 1st Graduate Symposium
N2  - Tagungsband der Graduiertentagung der FH Aachen, in dem Doktorandinnen und Doktoranden und ihre Forschungsbereiche vorgestellt werden
T3  - Graduiertentagung / FH Aachen - 1 
KW  - Aachen / Fachhochschule Aachen
KW  - Graduierter
KW  - Promotionsstudium
KW  - Graduiertentagung
KW  - Graduate symposium
Y1  - 2008
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-3125
ER  - 
TY  - CHAP
A1  - Groebel, Simone
A1  - Kowollik, Silvia
A1  - Crummenerl, Silvia
A1  - Schöning, Michael Josef
T1  - 2. Graduiertentagung : 5. November 2009 / [Hrsg.: S. Groebel ; S. Kowollik ; S. Crummenerl ; M. J. Schöning]
T1  - 2nd Graduate Symposium
N2  - Tagungsband der Graduiertentagung der FH Aachen, in dem Doktorandinnen und Doktoranden und ihre Forschungsbereiche vorgestellt werden
T3  - Graduiertentagung / FH Aachen - 2 
KW  - Aachen / Fachhochschule Aachen ; Graduierter ; Promotionsstudium
KW  - Graduiertentagung
KW  - Graduate symposium
Y1  - 2009
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-3131
ER  - 
TY  - CHAP
A1  - Kirchhof, M.
A1  - Kraft, Bodo
T1  - UML-based modeling of architectural knowledge and design
N2  - IASSE-2004 - 13th International Conference on Intelligent and Adaptive Systems and Software Engineering eds. W. Dosch, N. Debnath, pp. 245-250, ISCA, Cary, NC, 1-3 July 2004, Nice, France We introduce a UML-based model for conceptual design support in civil engineering. Therefore, we identify required extensions to standard UML. Class diagrams are used for elaborating building typespecific knowledge: Object diagrams, implicitly contained in the architect’s sketch, are validated against the defined knowledge. To enable the use of industrial, domain-specific tools, we provide an integrated conceptual design extension. The developed tool support is based on graph rewriting. With our approach architects are enabled to deal with semantic objects during early design phase, assisted by incremental consistency checks.
KW  - UML
KW  - UML
KW  - Unified Modeling Language
KW  - UML
KW  - Unified Modeling Language
Y1  - 2004
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Schneider, Gerd
T1  - Semantic Roomobjects for Conceptual Design Support : A Knowledge-based Approach
N2  - In: Computer Aided Architectural Design Futures 2005 2005, Part 4, 207-216, DOI: http://dx.doi.org/10.1007/1-4020-3698-1_19 The conceptual design at the beginning of the building construction process is essential for the success of a building project. Even if some CAD tools allow elaborating conceptual sketches, they rather focus on the shape of the building elements and not on their functionality. We introduce semantic roomobjects and roomlinks, by way of example to the CAD tool ArchiCAD. These extensions provide a basis for specifying the organisation and functionality of a building and free architects being forced to directly produce detailed constructive sketches. Furthermore, we introduce consistency analyses of the conceptual sketch, based on an ontology containing conceptual relevant knowledge, specific to one class of buildings.
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2005
SN  - 978-1-4020-3460-2
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Wilhelms, Nils
T1  - Visual Knowledge Specification for Conceptual Design
N2  - Proc. of the 2005 ASCE Intl. Conf. on Computing in Civil Engineering (ICCC 2005) eds. L. Soibelman und F. Pena-Mora, Seite 1-14, ASCE (CD-ROM), Cancun, Mexico, 2005 Current CAD tools are not able to support the fundamental conceptual design phase, and none of them provides consistency analyses of sketches produced by architects. To give architects a greater support at the conceptual design phase, we develop a CAD tool for conceptual design and a knowledge specification tool allowing the definition of conceptually relevant knowledge. The knowledge is specific to one class of buildings and can be reused. Based on a dynamic knowledge model, different types of design rules formalize the knowledge in a graph-based realization. An expressive visual language provides a user-friendly, human readable representation. Finally, consistency analyses enable conceptual designs to be checked against this defined knowledge. In this paper we concentrate on the knowledge specification part of our project.
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2005
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Retkowitz, Daniel
T1  - Operationale Semantikdefinition für konzeptuelles Regelwissen
N2  - In: Forum Bauinformatik 2005 : junge Wissenschaftler forschen / [Lehrstuhl Bauinformatik, Brandenburgische Technische Universität Cottbus. Frank Schley ... (Hrsg.)]. - Cottbus : Techn. Universität 2005. S. 1-10 ISBN 3-934934-11-0 
Mittels eines operationalen Ansatzes zur Semantikdefinition wird am Bei-spiel des konzeptuellen Gebäudeentwurfs ein Regelsystem formalisiert. Dazu werdenzwei Teile, zum einen das Regelwissen, zum anderen ein konzeptueller Entwurfsplan zunächst informell eingeführt und dann formal beschrieben. Darauf aufbauend wird die Grundlage für eine Konsistenzprüfung des konzeptuellen Entwurfs gegen das Regel-wissen formal angeben
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2005
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Retkowitz, Daniel
T1  - Graph Transformations for Dynamic Knowledge Processing
N2  - In: Proceedings of the 39th Annual Hawaii International Conference on System Sciences, 2006. HICSS '06 http://dx.doi.org/10.1109/HICSS.2006.200 The conceptual design phase at the beginning of the building construction process is not adequately supported by any CAD-tool. Conceptual design support needs regarding two aspects: first, the architect must be able to develop conceptual sketches that provide abstraction from constructive details. Second, conceptually relevant knowledge should be available to check these conceptual sketches. The paper deals with knowledge to formalize for conceptual design. To enable domain experts formalizing knowledge, a graph-based specification is presented that allows the development of a domain ontology and design rules specific for one class of buildings at runtime. The provided tool support illustrates the introduced concepts and demonstrates the consistency analysis between knowledge and conceptual design.
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2006
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Retkowitz, Daniel
T1  - Rule-Dependencies for Visual Knowledge Specification in Conceptual Design
N2  - In: Proc. of the 11th Intl. Conf. on Computing in Civil and Building Engineering (ICCCBE-XI) ed. Hugues Rivard, Montreal, Canada, Seite 1-12, ACSE (CD-ROM), 2006 Currently, the conceptual design phase is not adequately supported by any CAD tool. Neither the support while elaborating conceptual sketches, nor the automatic proof of correctness with respect to effective restrictions is currently provided by any commercial tool. To enable domain experts to store the common as well as their personal domain knowledge, we develop a visual language for knowledge formalization. In this paper, a major extension to the already existing concepts is introduced. The possibility to define rule dependencies extends the expressiveness of the knowledge definition language and contributes to the usability of our approach.
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2006
ER  - 
TY  - CHAP
A1  - Heer, Thomas
A1  - Redkowitz, Daniel
A1  - Kraft, Bodo
T1  - Tool Support for the Integration of Light-Weight Ontologies
N2  - Abstract of the authors: In many areas of computer science ontologies become more and more important. The use of ontologies for domain modeling often brings up the issue of ontology integration. The task of merging several ontologies, covering specific subdomains, into one united ontology has to be solved. Many approaches for ontology integration aim at automating the process of ontology alignment. However, a complete automation is not feasible, and user interaction is always required. Nevertheless, most ontology integration tools offer only very limited support for the interactive part of the integration process. In this paper, we present a novel approach for the interactive integration of ontologies. The result of the ontology integration is incrementally updated after each definition of a correspondence between ontology elements. The user is guided through the ontologies to be integrated. By restricting the possible user actions, the integrity of all defined correspondences is ensured by the tool we developed. We evaluated our tool by integrating different regulations concerning building design.
KW  - Ontologie <Wissensverarbeitung>
KW  - Knowledge Management
KW  - Ontology Engineering
KW  - Information Integration Tools
KW  - Human Factors
Y1  - 2008
SN  - 978-3-642-00670-8
ER  - 
TY  - CHAP
A1  - Schubert, Nicole
A1  - Schöning, Michael Josef
T1  - 3. Graduiertentagung der FH Aachen
T1  - 3rd Graduate Symposium
N2  - Doktoranden der FH Aachen stellen ihre wissenschaftlichen Arbeiten aus verschiedenen Fachdisziplinen vor.
T3  - Graduiertentagung / FH Aachen - 3 
KW  - Graduiertentagung
Y1  - 2010
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-3386
ER  - 
TY  - CHAP
A1  - Fredebeul-Krein, Markus
T1  - Encouraging competition and investment into next generation access networks: The case of long term risk sharing contracts
N2  - Working paper distributed at 2nd Annual Next Generation Telecommunications Conference 2009, 13th – 14th October 2009, Brussels 14 pages Abstract Governments all over Europe are in the process of adopting new broadband strategies. The objective is to create modern telecommunications networks based on powerful broadband infrastructures". In doing so, they aim for innovative and investment-friendly concepts. For instance, in a recently published consultation paper on the subject the German regulator BNetzA declared that it will take “greater account of … reducing risks, securing the investment and innovation power, providing planning certainty and transparency – in order to support and advance broadband rollout in Germany”. It further states that when regulating wholesale rates it has to be ensured that “… adequate incentives for network rollout are provided on the one hand, while sustainable and fair competition is ensured on the other”. Also an EC draft recommendation on regulated network access is about to set new standards for the regulation of next generation access networks. According to the recommendation the prices of new assets shall be based on costs plus a projectspecific risk premium to be included in the costs of capital for the investment risk incurred by the operator. This approach has been criticised from various sides. In particular it has been questioned whether such an approach is adequate to meet the objectives of encouraging both competition and investment into next generation access networks. Against this background, the concept of “long term risk sharing contracts” has been proposed recently as an approach which does not only incorporate the various additional risks involved in the deployment of NGA infrastructure, but has several other advantages. This paper will demonstrate that the concept allows for competition to evolve at both the retail and wholesale level on fair, objective, non-discriminatory and transparent terms and conditions. Moreover, it ensures the highest possible investment incentive in line with socially desirable outcome. The paper is organised as follows: The next section will briefly outline the importance of encouraging competition and investment in an NGA-environment. The third section will specify the design of long term risk sharing contracts in view of achieving these objectives. The fourth section will examine potential problems associated with the concept. In doing so a way of how to deal with them will be elaborated. The last section will look at arguments against long term risk sharing contracts. It will be shown that these arguments are not strong enough to build a case against introducing such contracts.
KW  - Electronic Commerce
KW  - Breitband Markt
KW  - Regulierung
KW  - Internet
KW  - Bundesnetzagentur
KW  - broadband market
KW  - regulation
KW  - Internet
KW  - next generation access networks
KW  - risk sharing
Y1  - 2009
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Meyer, Oliver
A1  - Nagl, Manfred
T1  - Graph technology support for conceptual design in civil engineering
N2  - In: Advances in intelligent computing in engineering : proceedings of the 9.International EG-ICE Workshop ; Darmstadt, (01 - 03 August) 2002 / Martina Schnellenbach-Held ... (eds.) . - Düsseldorf: VDI-Verl., 2002 .- Fortschritt-Berichte VDI, Reihe 4, Bauingenieurwesen ; 180 ; S. 1-35 The paper describes a novel way to support conceptual design in civil engineering. The designer uses semantical tools guaranteeing certain internal structures of the design result but also the fulfillment of various constraints. Two different approaches and corresponding tools are discussed: (a) Visually specified tools with automatic code generation to determine a design structure as well as fixing various constraints a design has to obey. These tools are also valuable for design knowledge specialist. (b) Extensions of existing CAD tools to provide semantical knowledge to be used by an architect. It is sketched how these different tools can be combined in the future. The main part of the paper discusses the concepts and realization of two prototypes following the two above approaches. The paper especially discusses that specific graphs and the specification of their structure are useful for both tool realization projects.
KW  - CAD
KW  - CAD ;
KW  - CAD
KW  - civil engineering
Y1  - 2002
SN  - 3-18-318004-9
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Nagl, Manfred
T1  - Support of Conceptual Design in Civil Engineering by Graph-based Tools
N2  - WS GTaD-2003 - The 1st Workshop on Graph Transformations and Design ed Grabska, E., Seite 6-7, Jagiellonian University Krakow. 2 pages
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2003
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Nagl, Manfred
T1  - Parameterized specification of conceptual design tools in civil engineering
N2  - Applications of Graph Transformations with Industrial Relevance Lecture Notes in Computer Science, 2004, Volume 3062/2004, 90-105, DOI: 10.1007/978-3-540-25959-6_7 In this paper we discuss how tools for conceptual design in civil engineering can be developed using graph transformation specifications. These tools consist of three parts: (a) for elaborating specific conceptual knowledge (knowledge engineer), (b) for working out conceptual design results (architect), and (c) automatic consistency analyses which guarantee that design results are consistent with the underlying specific conceptual knowledge. For the realization of such tools we use a machinery based on graph transformations. In a traditional PROGRES tool specification the conceptual knowledge for a class of buildings is hard-wired within the specification. This is not appropriate for the experimentation platform approach we present in this paper, as objects and relations for conceptual knowledge are due to many changes, implied by evaluation of their use and corresponding improvements. Therefore, we introduce a parametric specification method with the following characteristics: (1) The underlying specific knowledge for a class of buildings is not fixed. Instead, it is built up as a data base by using the knowledge tools. (2) The specification for the architect tools also does not incorporate specific conceptual knowledge. (3) An incremental checker guarantees whether a design result is consistent with the current state of the underlying conceptual knowledge (data base).
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2004
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
T1  - Conceptual design tools for civil engineering
N2  - Applications of Graph Transformations with Industrial Relevance Lecture Notes in Computer Science, 2004, Volume 3062/2004, 434-439, DOI: http://dx.doi.org/10.1007/978-3-540-25959-6_33 This paper gives a brief overview of the tools we have developed to support conceptual design in civil engineering. Based on the UPGRADE framework, two applications, one for the knowledge engineer and another for architects allow to store domain specific knowledge and to use this knowledge during conceptual design. Consistency analyses check the design against the defined knowledge and inform the architect if rules are violated.
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2004
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Nagl, Manfred
T1  - Semantic tool support for conceptual design
N2  - ITCE-2003 - 4th Joint Symposium on Information Technology in Civil Engineering ed Flood, I., Seite 1-12, ASCE (CD-ROM), Nashville, USA In this paper we discussed graph based tools to support architects during the conceptual design phase. Conceptual Design is defined before constructive design; the used concepts are more abstract. We develop two graph based approaches, a topdown using the graph rewriting system PROGRES and a more industrially oriented approach, where we extend the CAD system ArchiCAD. In both approaches, knowledge can be defined by a knowledge engineer, in the top-down approach in the domain model graph, in the bottom-up approach in the in an XML file. The defined knowledge is used to incrementally check the sketch and to inform the architect about violations of the defined knowledge. Our goal is to discover design error as soon as possible and to support the architect to design buildings with consideration of conceptual knowledge.
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2003
ER  - 
TY  - CHAP
A1  - Kraft, Bodo
A1  - Wilhelms, N.
T1  - Interactive distributed knowledge support for conceptual building design
N2  - In: Net-distributed Co-operation : Xth International Conference on Computing in Civil and Building Engineering, Weimar, June 02 - 04, 2004 ; proceedings / [ed. by Karl Beuke ...] . - Weimar: Bauhaus-Univ. Weimar 2004. - 1. Aufl. . Seite 1-14 ISBN 3-86068-213-X International Conference on Computing in Civil and Building Engineering <10, 2004, Weimar> Summary In our project, we develop new tools for the conceptual design phase. During conceptual design, the coarse functionality and organization of a building is more important than a detailed worked out construction. We identify two roles, first the knowledge engineer who is responsible for knowledge definition and maintenance; second the architect who elaborates the conceptual de-sign. The tool for the knowledge engineer is based on graph technology, it is specified using PROGRES and the UPGRADE framework. The tools for the architect are integrated to the in-dustrial CAD tool ArchiCAD. Consistency between knowledge and conceptual design is en-sured by the constraint checker, another extension to ArchiCAD.
KW  - CAD
KW  - CAD
KW  - Bauingenieurwesen
KW  - CAD
KW  - civil engineering
Y1  - 2004
SN  - 3-86068-213-X
ER  - 
TY  - CHAP
A1  - Groebel, Simone
A1  - Werner, Frederik
A1  - Jörres, Niklas
A1  - Jansen, F.
A1  - Kasper, Katharina
A1  - Schiffels, Johannes
A1  - Sprenger, B.
A1  - Baumann, Marcus
A1  - Schöning, Michael Josef
A1  - Selmer, Thorsten
T1  - Entwicklung einer Sensor-Überwachung für Biogasanlagen auf Basis von Prozessdaten einer Parallelanlage
T2  - 10. Dresdner Sensor-Symposium : Dresden, 5. - 7. Dezember 2011 ; miniaturisierte analytische Verfahren, Hochtemperatur-Sensoren, Sensoren für Bioprozess- und Verfahrenstechnik, Sensoren für die Medizin, Chemische Verfahrenstechnik, Lebensmittelanalytik, innovative Sensorlösungen, Sensoren für die Wasserqualität, Selbstüberwachung / Gerald Gerlach ... (Hg.)
N2  - Beim Ausbau nachhaltiger, regenerativer Energieversorgung hat die Umwandlung von organischer Biomasse in Biogas ein großes Potential. Der zugrundeliegende, komplexe biologische Prozess wird noch immer unzureichend verstanden und bedarf systematischer Untersuchungen der Prozessparameter, um einen hohen Ertrag bei guter Gasqualität zu ermöglichen. Die Fragestellungen zur Entschlüsselung des Prozesses sind sowohl verfahrenstechnischer als auch mikrobiologischer Natur. Aus mikrobiologischer Sicht ist die Kenntnis der tatsächlich beteiligten prozesstragenden Mikroorganismen von erheblicher Bedeutung, aus verfahrenstechnischer Sicht die Kenntnis der physikalischen und chemischen Faktoren, welche die mikrobiologischen Prozesse und kontrollieren. Im Zusammenspiel aller dieser Parameter wird die Biogasbildung befördert oder behindert, bis zum Abbruch des Prozesses.
Eine mögliche Kontrollmethode ist die Messung der metabolischen Aktivität prozesstragender Organismen.
Diese soll, beruhend auf fundierten Prozessdaten, gewonnen durch eine Parallelanlage, mit einem lichtadressierbaren potentiometrischen Sensor-System (LAPS) realisiert werden. Dieser Sensor ist in der Lage, pH-Wert-änderungen zu detektieren, die durch den Stoffwechsel der auf dem Chip immobilisierten Organismen hervorgerufen werden, um eine Online-Überwachung von Biogasanlagen zu ermöglichen.
Y1  - 2011
SN  - 978-3-942710-53-4
U6  - https://doi.org/10.5162/10dss2011/4.3
N1  - Dresdner Beiträge zur Sensorik 43 ;
Dresdner Sensor-Symposium ; 10 ; 2011 ; Dresden ; Forschungsgesellschaft für Messtechnik, Sensorik und Medizintechnik ; Zehntes Dresdner Sensor-Symposium ; Dresdner Sensor-Symposium ; (10 ; 2011.12.05-07 ; Dresden)
SP  - 81
EP  - 84
PB  - TUDpress
CY  - Dresden
ER  - 
TY  - CHAP
A1  - Müller-Veggian, Mattea
A1  - Haenni, D. R.
A1  - Beuscher, H.
A1  - Lieder, R. M.
T1  - Weak coupling of a neutron hole to a ¹⁴⁶ Gd core ; an in-beam study of ¹⁴⁵ Gd
T2  - Structure of medium-heavy nuclei, 1979 : proceedings of the 6. European Physical Soc. Nuclear Divisional Conference on the Structure of Medium-Heavy Nuclei held in Rhodes, Greece, 1-4 May 1979 / ed. Committee: G. S. Anagnostatos ... - (Conference series / Institute of Physics London, Bristol ; 49)
Y1  - 1980
SN  - 0-85498-140-3
N1  - Conference on the Structure of Medium Heavy Nuclei <6, 1979, Rodos> ; European Physical Society / Nuclear Physics Division
SP  - 133
PB  - Inst. of Physics
CY  - Bristol
ER  - 
TY  - CHAP
A1  - Müller-Veggian, Mattea
A1  - Neskakis, A.
A1  - Lieder, R. M.
A1  - Beuscher, H.
T1  - Study of rotational aligned bands in ¹⁹⁰,¹⁹²,¹⁹⁴ Au
T2  - Nuclear interactions : International Conference on Nuclear Interactions held in Canberra, 28 Aug. - 1 Sept. 1978 / ed. by Brian Albert Robson. - (Lecture notes in physics ; 92)
Y1  - 1978
SN  - 978-3-540-09102-8
N1  - Australian Academy of Science <Canberra> ; International Conference on Nuclear Interactions <1978, Canberra>
SP  - 428
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Müller-Veggian, Mattea
A1  - Dehnhardt, W.
A1  - Mills, J. S.
T1  - Levels in the closed neutron shell nucleus ¹⁴² Nd
T2  - International Symposium on Highly Excited States in Nuclei held at Jülich from 23-26 September 1975 : proceedings; Vol. 1 Contributed papers
Y1  - 1975
N1  - International Symposium on Highly Excited States in Nuclei <1975, Jülich> ;  European Physical Society ; Institut für Kernphysik <Jülich>
SP  - 51
PB  - Verlag des Forschungszentrums Jülich
CY  - Jülich
ER  - 
TY  - CHAP
A1  - Peters, H.
A1  - Ziemons, Karl
A1  - Dammers, J.
A1  - Müller-Veggian, Mattea
ED  - Nenonen, Jukka
T1  - Continuous head motion detection during MEG measurement using head location coils
T2  - Proceedings of the 12th International Conference on Biomagnetism : August 13 - 17, 2000, Helsinki University of Technology, Espoo, Finland
Y1  - 2001
SN  - 951-22-5401-8
N1  - Biomag <12, 2000, Espoo> ; Teknillinen Korkeakoulu <Helsinki> ; International Conference on Biomagnetism <12, 2000, Espoo>
PB  - Helsinki Univ. of Technology, Laboratory of Biomedical Engineering
CY  - Espoo
ER  - 
TY  - CHAP
A1  - Müller-Veggian, Mattea
A1  - Dehnhardt, W.
A1  - Merdinger, I. G.
A1  - Mills, S. J.
T1  - High-spin yrast states in transitional nuclei ¹³²,¹³⁴ Ce
T2  - Proceedings of the International Conference on Nuclear Physics : Munich, August 27 - September 1, 1973
Y1  - 1973
SN  - 0-7204-0280-8
SP  - 180
PB  - North Holland Pub.
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Müller-Veggian, Mattea
A1  - Bochev, B.
A1  - Lieder, R. M.
A1  - Didelez, J. P.
T1  - Measuremenmt of particle spectra of α induced non-equilibrium reactions for ²⁰⁶⁻²¹² Po
T2  - Proceedings of the International Conference on Nuclear Physics. 1980,1 (1981)
Y1  - 1981
N1  - Vol. 1: Abstracts of papers ; International Conference on Nuclear Physics <1980, Berkeley, Calif.>
SP  - 452
ER  - 
TY  - CHAP
A1  - Funke, Harald
A1  - Börner, Sebastian
A1  - Hendrick, P.
A1  - Recker, E.
A1  - Elsing, R.
ED  - DeLuca, Luigi T.
T1  - Development and integration of a scalable low NOx combustion chamber for a hydrogen fuelled aero gas turbine
T2  - Progress in Propulsion Physics. - Vol. 4
Y1  - 2013
SN  - 978-2-7598-0876-2
U6  - https://doi.org/10.1051/eucass/201304357
N1  - 4th European Conference for Aero-Space Sciences : July 4 - 8, 2011, St Petersburg, Russia ; EUCASS <4, 2011, St. Petersburg>
SP  - 357
EP  - 372
PB  - EDP Sciences
CY  - [Les Ulis]
ER  - 
TY  - CHAP
A1  - Logen, Steffen
A1  - Höfken, Hans
A1  - Schuba, Marko
T1  - Simplifying RAM Forensics : A GUI and Extensions for the Volatility Framework
T2  - 2012 Seventh International Conference on Availability, Reliability and Security (ARES), 20-24 August 2012, Prague, Czech Republic
N2  - The Volatility Framework is a collection of tools for the analysis of computer RAM. The framework offers a multitude of analysis options and is used by many investigators worldwide. Volatility currently comes with a command line interface only, which might be a hinderer for some investigators to use the tool. In this paper we present a GUI and extensions for the Volatility Framework, which on the one hand simplify the usage of the tool and on the other hand offer additional functionality like storage of results in a database, shortcuts for long Volatility Framework command sequences, and entirely new commands based on correlation of data stored in the database.
Y1  - 2012
SN  - 978-1-4673-2244-7
U6  - https://doi.org/10.1109/ARES.2012.12
SP  - 620
EP  - 624
PB  - IEEE
CY  - New York
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
A1  - Blaß, Hans Joachim
T1  - Edge Joints with Dowel Type Fasteners in Cross Laminated Timber
T2  - Proceedings. CIB-W18 Meeting 2007, Bled, Slovenia 2007
Y1  - 2007
SN  - 0945-6996
N1  - Paper 40-7-2
SP  - 1
EP  - 11
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
T1  - Brettsperrholz – Verbindungen mit mechanischen Verbindungsmitteln
T2  - Ingenieurholzbau, Karlsruher Tage 2007 : Forschung für die Praxis; 4. und 5. Oktober 2007; Tagungsband / Universität Karlsruhe (TH), Lehrstuhl für Ingenieurholzbau und Baukonstruktionen
Y1  - 2007
SP  - 62
EP  - 73
PB  - Bruder-Verlag
CY  - Köln
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
A1  - Blaß, Hans Joachim
ED  - Kuhlmann, U.
T1  - Spaltverhalten von Holz beim Eindrehen von selbstbohrenden Holzschrauben
T2  - Doktorandenkolloquium Holzbau Forschung und Praxis : Stuttgart, 05./06. März 2008
Y1  - 2008
SP  - 135
EP  - 142
PB  - Univ., Inst. für Konstruktion und Entwurf
CY  - Stuttgart
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
T1  - Beurteilung der Spaltgefahr beim Eindrehen von selbstbohrenden Holzschrauben
T2  - Forum Holz/Bau Garmisch 09 : Internationales Holzbauforum (IHF) ; Congress Centrum, Garmisch-Partenkirchen, 2. - 4. Dezember 2009 ; aus der Praxis - für die Praxis, Wirtschaft, Markt, Ökologie, Energieeffizienz, Architektur, Tragwerke, Realisierungen
Y1  - 2009
SN  - 978-3-8167-8187-5
N1  - Internationales Holzbauforum ; (15 ; 2009.12.02-04 ; Garmisch-Partenkirchen)
PB  - Fraunhofer IRB
CY  - Stuttgart
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
A1  - Blaß, Hans Joachim
ED  - Cecotti, A.
T1  - Determining Suitable Spacings and Distances for Self-tapping Screws by Experimental and Numerical Studies
T2  - Proceedings of the 11th World Conference on Timber Engineering, WCTE 2010 : World Conference on Timber Engineering; [June 20 - 24, 2010, Riva del Garda, Trento, Italy] . Vol. III, Riva del Garda, Italy 2010
Y1  - 2010
N1  - Extended abstract. Full paper: DVD, Session 55, ID 108, 9 Seiten
SP  - 669
EP  - 670
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
A1  - Blaß, Hans Joachim
T1  - A new method to determine suitable spacings and distances for self-tapping screws
T2  - Meeting ... / International Council for Research and Innovation in Building and Construction, Working Commission W18 - Timber Structures
N2  - The determination of spacing, edge and end distance requirements for self-tapping screws requires numerous and comprehensive insertion tests. Yet the results of such tests cannot be transferred to other types of screws or even to screws of different diameter because of differences in shape or geometry. To reduce the effort of insertion tests a new method was developed which allows the estimation of required spacings, distances and timber thickness.
Y1  - 2010
SN  - 1864-1784
N1  - Paper 43-21-2
VL  - 43
PB  - Lehrstuhl für Ingenieurholzbau und Baukonstruktionen
CY  - Karlsruhe
ER  - 
TY  - CHAP
A1  - Blaß, Hans Joachim
A1  - Uibel, Thomas
ED  - Kuhlmann, U.
T1  - Tragfähigkeit von stiftförmigen Verbindungsmitteln in Brettsperrholz
T2  - Forschungskolloquium, Holzbau Forschung und Praxis, Stuttgart 2006. Tagungsband
Y1  - 2006
SP  - 167
EP  - 174
PB  - Universität
CY  - Stuttgart
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
A1  - Blaß, Hans Joachim
T1  - Load Carrying Capacity of Joints with Dowel Type Fasteners in Solid Wood Panels
T2  - Proceedings. CIB-W18 Meeting 2006, Florence, Italy 2006
Y1  - 2006
SN  - 0945-6996
N1  - Paper 39-7-5
SP  - 1
EP  - 10
ER  - 
TY  - CHAP
A1  - Blaß, Hans Joachim
A1  - Uibel, Thomas
ED  - Moosbrugger, Thomas
T1  - Forschung an der Universität Karlsruhe - Stiftförmige Verbindungsmittel in Brettsperrholz
T2  - Brettsperrholz : ein Blick auf Forschung und Entwicklung ; 5. Grazer Holzbau-Fachtagung ; 5. GraHFT' 06; Tagungsband ; Graz, am 29. September 2006 / Institut für Holzbau und Holztechnologie ... [Tagungsband: Thomas Moosbrugger ...]
Y1  - 2006
SN  - 3-902020-32-6
N1  - Grazer Holzbau-Fachtagung ; (5 ; 2006.09.29 ; Graz); Institut für Holzbau und Holztechnologie
SP  - I-6
EP  - I-16
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  - https://doi.org/10.1109/NSSMIC.2011.6154621
SP  - 1380
EP  - 1382
PB  - IEEE
CY  - New York
ER  - 
TY  - CHAP
A1  - Wahle, Michael
T1  - Determination of flow induced nonlinear vibrations of prestressed heat exchanger tubes
T2  - Advanced Course in Heat Exchangers : Theory and Practice ; ICHMT Symposium ; Dubrovnik, Croatia 1981. - (ICHMT digital library online ; 19)
Y1  - 1983
SP  - 339
EP  - 353
PB  - Begell House
CY  - Redding, Connecticut
ER  - 
TY  - CHAP
A1  - Gerhards, Michael
A1  - Sander, Volker
A1  - Belloum, Adam
T1  - Seamlessly enabling the use of cloud resources in workflows
T2  - Cloud Computing 2013 : The Fourth International Conference on Cloud Computing, GRIDs, and Virtualization : May 27 - June 1, 2013 - Valencia, Spain
Y1  - 2013
SN  - 978-1-61208-271-4
SP  - 108
EP  - 114
PB  - Curren
CY  - Red Hook, NY
ER  - 
TY  - CHAP
A1  - Faber, Christian
T1  - Solare Großbäckerei in Burkina Faso als Beispiel eines solaren Prozesswärmesystems
T2  - 14. Symposium Thermische Solarenergie : 12. bis 14. Mai 2004, Kloster Banz, Bad Staffelstein / OTTI-Kolleg Technik, Energie, Management
Y1  - 2004
SN  - 3-934681-33-6
SP  - 500
EP  - 505
PB  - OTTI-Energie-Kolleg
CY  - Regensburg
ER  - 
TY  - CHAP
A1  - Schwarzer, Klemens
A1  - Vieira, Maria Eugenia
A1  - Müller, Christoph
A1  - Lehmann, Harry
A1  - Coutinho, Lecimara
T1  - Modular solar thermal desalination system with flat plate collector
T2  - RIO 3 - World Climate & Energy Event : proceedings of the international conference held in Rio de Janeiro, Brazil, 1 -5 december 2003 / chief-ed.: Stefan Krauter ...
Y1  - 2003
SN  - 85-902710-2-1
SP  - 281
EP  - 286
PB  - Krauter
CY  - Rio de Janeiro
ER  - 
TY  - CHAP
A1  - Anik, Sabri
A1  - Frohberg, Martin G.
ED  - Brodowsky, Horst
T1  - Thermodynamic behaviour of oxygen in molten metallic alloys
T2  - Thermochemistry of alloys : recent developments of experimental methods ; [proceedings of the NATO Advanced Study Institute on Thermochemistry of Alloys, Recent Developments of Experimental Methods, Kiel, F.R.G., August 17 - 27, 1987]. - (NATO ASI series : Series C ; 286)
Y1  - 1989
SN  - 0-7923-0434-9
SP  - 419
EP  - 428
PB  - Springer
CY  - Dordrecht [u.a.]
ER  -