@article{MisztalMisztal1997, author = {Misztal, S. and Misztal, G.}, title = {Anwendung von Delta-Dirac-Funktion und Heviside-Funktion zur Berechnung der inneren Kr{\"a}fte und Verschiebungen in gebogenen Balken}, doi = {10.25643/bauhaus-universitaet.530}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-5308}, year = {1997}, abstract = {Die d - Dirac - Funktion d(x-xi) und Heviside - Funktion wurden vor allem zur Beschreibung diskontinuierlicher Belastungsfunktionen von gebogenen Balken angewendet. Im Referat werden die mathematischen Operationen auf den erw{\"a}hnten Funktionen dargestellt. Dar{\"u}ber hinaus wird die M{\"o}glichkeit eindeutiger Aufschreibung von belibigen Belestungsfunktionen vorgeschlagen, die fast alle F{\"a}lle der in der Ingenieurpraxis auftretenden Belastungen umfassen. Die vorgeschlagenen L{\"o}sungen geben die M{\"o}glichkeit leichter Aufschreibung im Form eines Algorithmus, das die Ausnutzung von Komputertechnik in statischen Berechnungen erm{\"o}glicht. Am Ende des Referates werden die Zahlebeispiele dargestellt, die die M{\"o}glichkeiten praktischer Anwendungen der besprochenen Funktionen darstellen.}, subject = {Balken}, language = {de} } @article{MenzelMahdaviHartkopfetal.1997, author = {Menzel, Karsten and Mahdavi, A. and Hartkopf, V. and Lee, S.}, title = {Information technology for construction management and building performance evaluation support - a North-American perspective}, doi = {10.25643/bauhaus-universitaet.491}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4917}, year = {1997}, abstract = {We provide a critical overview of the current status of computational support for construction the management and building performance evaluation in North-America. This overview is based on the research conducted in relation to the design and construction of the Intelligent Workplace (IW), Carnegie Mellon University, Pittsburgh, Pennsylvania, USA. With regard to the commercial software products in the field of construction management the following limitations can be identified: Although project planning, cost estimating and construction simulation are supported, tasks like bidding as well as site and material management have not received the same level of attention. Few project management software packages are integrated in a total design support software system. Little analysis or evaluation options are provided to support managerial decision making. Various research groups address the construction planning and scheduling, construction contracting, site layout generation as well as the integration of these three topics. Currently problems such as efficient material management and calculation of environmental and energy responsive site management are insufficiently addressed within the ongoing research projects. In the domain of building performance simulation and decision support one can notice that, the development and application of computational tools is industry driven. As a result the concerns addressed by the tools are mainly issues pertaining to the selection and sizing of systems and components rather than an integrated performance evaluation. Consequently, these programs are rarely used by building designers, especially in the early design stages, where the predictive capabilities of simulation tools could be of significant value. Although many research institutions address the necessity for the integration of performance simulation within the overall design support environments most of the practically available performance simulation tools still remain mono-dimensional and isolated.}, subject = {Bauausf{\"u}hrung}, language = {en} } @article{DonathPetzold1997, author = {Donath, Dirk and Petzold, Frank}, title = {Zuk{\"u}nftige Techniken f{\"u}r eine computergest{\"u}tzte Planungspraxis - applikative Tools f{\"u}r die architektonische Bestandserfassung}, doi = {10.25643/bauhaus-universitaet.496}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4962}, year = {1997}, abstract = {Der Beitrag beschreibt die Entwicklung eines Softwaresystems zur strukturierten Erfassung und Verwaltung bestehender Geb{\"a}ude in der Architektur. Die Erfassung erfolgt durch die Aufnahme von geometrischen Daten und Sachdaten in unterschiedlichen Abstraktionsstufen unter Einbeziehung einer vorangehenden Dekomposition. Basis f{\"u}r die Entwicklung eines solchen Systems ist die Analyse und Systematik der Erfassungstechniken, -abl{\"a}ufe und der Gegenstand der architektonischen Bestandsaufnahme. Parallel hierzu erfolgt die Bewertung und Nutzung aktueller Techniken und Werkzeuge der applikativen Informatik. Schwerpunkte der Forschungsarbeit sind die Ableitung einer allgemeinen Geb{\"a}ude- und Bauteilstruktur, die Einbeziehung aktueller informationstechnischer Verfahren und Werkzeuge und die Entwicklung eines entsprechenden Experimentalsystems. Auf eine Auswahl softwaretechnischer Entwicklungen wird n{\"a}her eingegangen (objektspezifische Eigenschaften, flexible Geometrieerfassung und Benutzeroberfl{\"a}chen).}, subject = {Bauaufnahme}, language = {de} } @inproceedings{Wolff1997, author = {Wolff, Ulrich}, title = {Konzept zur rechnergest{\"u}tzten integrierten Projektsteuerung im Bauwesen}, doi = {10.25643/bauhaus-universitaet.453}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4531}, year = {1997}, abstract = {Projektsteuerung gewinnt als Aufgabenfeld bei der Realisierung von Investitionsprojekten st{\"a}ndig an Bedeutung. Zur Bew{\"a}ltigung der umfangreichen und komplizierten Aufgaben des Projektsteuerers wird zunehmend Software angeboten und genutzt. Dabei ist feststellbar, daß von einer integrierten Projektsteuerung unter Ber{\"u}cksichtigung der Kriterien Leistung, Termin und Kosten nicht gesprochen werden kann, weil wesentliche theoretische und praktische Voraussetzungen fehlen. Im Beitrag werden Defizite der praktizierten Vorgehensweise und L{\"o}sungsans{\"a}tze f{\"u}r eine integrierte rechnergest{\"u}tzte Projektsteuerung vorgestellt. Durch geeignete Formen der Projektstrukturierung und eine Kopplung auf dem Mark befindlicher Standardsoftware k{\"o}nnen geeignete L{\"o}sungen gefunden werden. Problempunkte dabei stellen die Schnittstellen zwischen den Anwenderprogrammen die Datenbeschaffung und -verwaltung sowie geeignete Verfahren zur Kostenermittlung und -verfolgung dar. Im Beitrag werden eine bereits praktizierte und eine in Entwicklung befindliche L{\"o}sung vorgestellt.}, subject = {Bauwesen}, language = {de} } @inproceedings{Hoelzer2003, author = {H{\"o}lzer, Wolfgang}, title = {Advanced Planning and Scheduling Systems: Optimierungsmethoden in der interaktiven Entscheidungsunterst{\"u}tzung auf Basis von ERP und Feinplanung}, doi = {10.25643/bauhaus-universitaet.308}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-3080}, year = {2003}, abstract = {Seit die Datenverarbeitung in ihrer Komplexit{\"a}t sich der Thematik des Computer Integrated Manufacturing widmet geh{\"o}rt die Produktionsplanung und Steuerung zu jenen Bereichen, in denen eine Computerunterst{\"u}tzung am vordringlichsten erschien. Sp{\"a}ter sind betriebswirtschaftliche Gesamtl{\"o}sungen entstanden, die (bis heute recht unpr{\"a}zise) als Enterprise Resource Planning (ERP)-Systeme bezeichnet werden und in ihren Logistik-Modulen auch Funktionen der Produktionsplanung abdecken. Alle bekannten MRP-, PPS- und auch ERP-Systeme beruhen auf einer Sukzessivplanung. Advanced Planning and Scheduling (APS) Systems finden seit etwa 1995 zunehmend Interesse. Neben Demand Planning, Production Planning and Scheduling, Distribution Planning, Transportation Planning und Supply Chain Planning werden L{\"o}sungen f{\"u}r Anzahl und Standorte von Produktionsst{\"a}tten und Auslieferungslagern, Zuordnung zu Produktionsst{\"a}tten, Kapazit{\"a}tsbestimmung f{\"u}r Arbeitskr{\"a}fte und Betriebsmittel je Standort, Lagerhaltung je Teil und Lager, Bestimmung ben{\"o}tigter Transportmittel und H{\"a}ufigkeit ihres Einsatzes, Zuordnung von Lagern zu Produktionsst{\"a}tten von M{\"a}rkten zu Lagern u.a.m. von APS-Systemen erwartet. D.h. APS-Systeme erg{\"a}nzen ERP-L{\"o}sungen, nutzen die bereits durch das ERP-System vorhandenen Daten und ben{\"o}tigen neuartige Algorithmen und (Meta-) Heuristiken. Im Rahmen des Vortrages werden Modelle und Echtzeitalgorithmen zur Optimierung der Logistik f{\"u}r Prozesse mit kurzfristigen Anforderungen, geographisch verteilter Produktion, Lagerhaltung der Ausgangs-, Zwischen- und Endprodukte und wechselnden Transport-Bedingungen aus der Sicht der praktischen Umsetzung und Anwendung in Form einer ASP-L{\"o}sung aufgezeigt und diskutiert.}, subject = {Produktionsplanung}, language = {de} } @inproceedings{AmezianeLasserre2003, author = {Ameziane, Farid and Lasserre, Stephane}, title = {SYSBAT - An Application to the Building ProductionBased on Computer Supported Cooperative Work}, doi = {10.25643/bauhaus-universitaet.274}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2748}, year = {2003}, abstract = {Our proposed solution is to enable partners of a construction project to share all the technical data produced and handled during the building production process by building a system through the use of internet technology. The system links distributed databases and allows building partners to access remotely and manipulate specific information. It provides an updated building representation that is being enriched and refined all along the building production process. A recent collaboration with Nemetschek France (subsidiary company of Nemetschek AG, AEC CAD software leader) focus on a building product repository available in a web context. The aim is to help building project actors to choose a technical solution that fits its professional needs, and maintain our information system with up to date information. It starts with the possibility to build on line building product catalogs, in order to link Allplan CAD entities with building technical features. This paper presents the conceptual approaches on which our information system is built. Starting from a general organization diagram organization, we focus on the product and the description branches of construction works (including last IFC model specifications). Our aim is to add decisional support to the construction works selection process. To do so, we consider the actor's role upon the system and the pieces of information each one needs to achieve a given task.}, subject = {Bauplanung}, language = {en} } @inproceedings{BerbigMenzelEisenblaetter2003, author = {Berbig, Torsten and Menzel, Karsten and Eisenbl{\"a}tter, Karin}, title = {"Mobile Computing" - Anforderungen \& Einf{\"u}hrungsstratgie aus Sicht der Baupraxis}, doi = {10.25643/bauhaus-universitaet.294}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2948}, year = {2003}, abstract = {Die Sicherung der Wettbewerbsf{\"a}higkeit im Bereich des Bauwesens, insbesondere kleinerer und mittelst{\"a}ndischer Betriebe erfordert ein aktives Handeln als Antwort auf die sich {\"a}ndernde Wettbewerbssituation. Einen wesentlichen Wettbewerbsvorteil k{\"o}nnen kleine unternehmerische Einheiten durch h{\"o}here Flexibilit{\"a}t, schnelle Reaktion auf Kundenw{\"u}nsche oder aktuelle Situationen auf der Baustelle und Marktn{\"a}he erreichen. Dazu ist es n{\"o}tig, die Informations- und Kommunikationsstr{\"o}me durch Einsatz standardisierter und kosteng{\"u}nstiger Hard- und Software wie z.B. Handhelds zu unterst{\"u}tzen und insbesondere die existierenden Hindernisse im Informationsfluss zwischen Baustelle und B{\"u}ro zu beseitigen. Am Beispiel der Projekte >IuK - SystemBau< und >eSharing< wird eine Einf{\"u}hrungsstrategie f{\"u}r >Mobile Computing< in kleinen unternehmerischen Einheiten des Bauwesens (KMU) basierend auf einer umfangreichen Anforderungsanalyse vorgestellt. Folgende Aspekte sollen beschrieben werden: durchg{\"a}ngiger Einsatz der Technik unter Beachtung der verschiedenen Qualifikationsniveaus, Einf{\"u}hrungsunterst{\"u}tzung durch Schulungen, Prozessanalyse und m{\"o}gliche Integration in bestehende Software-Umgebungen sowie Feldtests.}, subject = {Bauablauf / Ablaufplanung}, language = {de} } @inproceedings{BilekHartmann2003, author = {Bilek, Jochen and Hartmann, Dietrich}, title = {Agentenbasiertes Kooperationsmodell zur Unterst{\"u}tzung vernetzter Planungsprozesse in der Tragwerksplanung}, doi = {10.25643/bauhaus-universitaet.279}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2791}, year = {2003}, abstract = {Die heutige Situation in der Tragwerksplanung ist durch das kooperative Zusammenwirken einer gr{\"o}ßeren Anzahl von Fachleuten verschiedener Disziplinen (Architektur, Tragwerksplanung, etc.) in zeitlich befristeten Projektgemeinschaften gekennzeichnet. Bei der Abstimmung der hierdurch bedingten komplexen, dynamischen und vernetzten Planungsprozesse kommt es dabei h{\"a}ufig zu Planungsm{\"a}ngeln und Qualit{\"a}tseinbußen. Dieser Artikel zeigt auf, wie mit Hilfe der Agententechnologie L{\"o}sungsans{\"a}tze zur Verbesserung der Planungssituation erreicht werden k{\"o}nnen. Hierzu wird ein Agentenmodell f{\"u}r die vernetzt-kooperative Tragwerksplanung vorgestellt und anhand der Planung einer Fußg{\"a}ngerbogenbr{\"u}cke anschaulich demonstriert. Das Agentenmodell erfasst (1) die beteiligten Fachplaner und Organisationen, (2) die tragwerksspezifischen Planungsprozesse, (3) die zugeh{\"o}rigen (Teil-)Produktmodelle und (4) die genutzte (Ingenieur-)Software. Hieraus leiten sich die drei Teilmodelle (1) agentenbasiertes Kooperationsmodell, (2) agentenbasierte Produktmodellintegration und (3) Modell zur agentenbasierten Software-Integration ab. Der Fokus des Artikels liegt auf der Darstellung des agentenbasierten Kooperationsmodells.}, subject = {Tragwerk}, language = {de} } @inproceedings{KellerAntoniadisMenzel2004, author = {Keller, Martin and Antoniadis, George and Menzel, Karsten}, title = {Resource Management for the Construction Industry}, doi = {10.25643/bauhaus-universitaet.167}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1679}, year = {2004}, abstract = {The management of resources is an essential task in each construction company. Today, ERP systems and e-Business systems are available to assist construction companies to efficiently organise the allocation of their personnel and equipment within the company, but they cannot provide the company with the idle resources for every single task that has to be performed during a construction project. Therefore, companies should have an alternative solution to better exploit expensive resources and compensate their fixed costs, but also have them available at the right time for their own business activities. This paper outlines the approach taken by the EU funded project "e-Sharing" (IST-2001-33325) to support resource management between construction companies. It will describe requirements for the management of construction resources, its core features, and the integration approach. Therefore, we will outline the approach of an integrated resource type model supporting the management and classification of construction equipment, construction tasks and qualification profiles. The development is based on a cross-domain analysis and evaluation of existing models. ...}, subject = {Baubetrieb}, language = {en} } @inproceedings{KoenigKlingerBerkhahn2004, author = {K{\"o}nig, Markus and Klinger, Axel and Berkhahn, Volker}, title = {Structural Correctness of Planning Processes in Building Engineering}, doi = {10.25643/bauhaus-universitaet.169}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1690}, year = {2004}, abstract = {The planning of projects in building engineering is a complex process which is characterized by a dynamical composition and many modifications during the definition and execution time of processes. For a computer-aided and network-based cooperation a formal description of the planning process is necessary. In the research project "Relational Process Modelling in Cooperative Building Planning" a process model is described by three parts: an organizational structure with participants, a building structure with states and a process structure with activities. This research project is part of the priority program 1103 "Network-Based Cooperative Planning Processes in Structural Engineering" promoted by the German Research Foundation (DFG). Planning processes in civil engineering can be described by workflow graphs. The process structure describes the logical planning process and can be formally defined by a bipartite graph. This structure consists of activities, transitions and relationships between activities and transitions. In order to minimize errors at execution time of a planning process a consistent and structurally correct process model must be guaranteed. This contribution considers the concept and the algorithms for checking the consistency and the correctness of the process structure.}, subject = {Baubetrieb}, language = {de} } @inproceedings{Palm2004, author = {Palm, Johan}, title = {Integrated Engineering Workflow focused on the Structural Engineering in the Industrial Environment}, doi = {10.25643/bauhaus-universitaet.162}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1625}, year = {2004}, abstract = {The engineering and construction industry has been slow to exploit the full potential of information technology. The industry is highly fragmented, price sensitive, risk-adverse, and profit margins are small. Each project is unique with a small amount of technological innovation opportunities to capitalise on from one project to the next. Technological innovations that have been taking place are just simulating the old traditional paper workflow. Engineering information in digital form is being conveyed using traditional paper representations, which have to be interpreted by humans before the information can be used in other applications, thereby creating 'islands of information'. It can be seen that poorly implemented IT strategies are duplicating paperwork, rather than reducing or eliminating it (Crowley et al., 2000). This paper will introduce the Integrated Engineering Workflow (IEW) concept to re-organise a structural discipline working on multi-disciplinary projects so as to maximise the advantages offered by new information technology.}, subject = {Baubetrieb}, language = {en} } @inproceedings{BiltchoukPahl2004, author = {Biltchouk, Irina and Pahl, Peter Jan}, title = {Interaction of Data Bases and Graphical Interfaces in Civil Engineering}, doi = {10.25643/bauhaus-universitaet.163}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1636}, year = {2004}, abstract = {Applications for civil engineering tasks usually contain graphical user interfaces for the engineering processes. Persistent objects of the applications are stored to data bases. The influence of the interaction between a graphical user interface and a data base for the development of an civil engineering application is investigated in this paper. A graphic application for the linear elastic analysis of plane frames, which was previously developed with standard tools of the Java platform, is compared to a redesigned implementation using a generalized data base for persistent objects. The investigation leads to the following results : - A strict distinction between persistent and transient objects influences the class structure of an application, in particular the class structure of a graphical user interface. - The structure of an application depends on the logic for updating of references to persistent and transient graphical objects after an application is read from a file. - The complexity of the reference management can usually be handled better by just in time referencing associated with String - identifiers rather than by automated referencing associated with Name - identifiers.}, subject = {Baubetrieb}, language = {en} } @inproceedings{Zaneldin2004, author = {Zaneldin, Essam}, title = {Investigate the Impact of Different Resource Allocation Strategies on the Design of Building Projects Using Simulation}, doi = {10.25643/bauhaus-universitaet.165}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1658}, year = {2004}, abstract = {The design of building projects involves several types of resources such as architects, structural engineers, mechanical engineers, electrical engineers, and draftsmen, among others. For design firms to stay in business in this very competitive market, they need to manage their resources in a way that improves productivity and cost effectiveness. This task, however, is not simple and requires thorough analysis of process-level operations, resource use, and productivity. Typically, these operational aspects are the responsibility of the design office manager who assigns available resources to the different design projects to save time and lower design expenses. It is noted that limited studies have been carried out in the literature to model overall organizational operations and behavioral aspects, particularly in firms specialized in the design of building projects. In an effort to simplify the modeling process, a simplified modeling and simulation tool is used in this research. A simulation model representing an actual design office was developed assuming that the office performs designs for small, medium, and large size building projects. The developed model was used to simulate several alternatives and examine various resource assignment strategies. The simulation was conducted over ten years and the resulting productivity and income was measured.}, subject = {Baubetrieb}, language = {en} } @inproceedings{Huhnt2004, author = {Huhnt, Wolfgang}, title = {Progress Measurement in Planning Processes on the Base of Process Models}, doi = {10.25643/bauhaus-universitaet.166}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1664}, year = {2004}, abstract = {This paper presents a specific modeling technique that is focused on preparing planning processes in civil engineering. Planning processes in civil engineering are characterized by some peculiarities so that the sequence of planning tasks needs to be determined for each planning project. Neither the use of optimized partial processes nor the use of lower detailed and optimized processes guarantee an optimal overall planning process. The modeling technique considers these peculiarities. In a first step, it is focused on the logic of the planning process. Algorithms based on the graph theory determine that logic. This approach ensures consistency and logical correctness of the description of a planning process at the early beginning in its preparation phase. Sets of data - the products of engineers like technical drawings, technical models, reports, or specifications - form the core of the presented modeling technique. The production of these sets of data requires time and money. This is expressed by a specific weighting of each set of data in the presented modeling technique. The introduction of these weights allows an efficient progress measurement and controlling of a planning project. For this purpose, a link between the modeling technique used in the preparation phase and the execution phase is necessary so that target and actual values are available for controlling purposes. The present paper covers the description of this link. An example is given to illustrate the use of the modeling technique for planning processes in civil engineering projects.}, subject = {Baubetrieb}, language = {en} } @inproceedings{ElRayesKandil2004, author = {El-Rayes, Khaled and Kandil, Amr}, title = {Distributed Computing for the Optimization of Large-Scale Construction Projects}, doi = {10.25643/bauhaus-universitaet.160}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1601}, year = {2004}, abstract = {Available construction time-cost trade-off analysis models can be used to generate trade-offs between these two important objectives, however, their application is limited in large-scale construction projects due to their impractical computational requirements. This paper presents the development of a scalable and multi-objective genetic algorithm that provides the capability of simultaneously optimizing construction time and cost large-scale construction projects. The genetic algorithm was implemented in a distributed computing environment that utilizes a recent standard for parallel and distributed programming called the message passing interface (MPI). The performance of the model is evaluated using a set of measures of performance and the results demonstrate the capability of the present model in significantly reducing the computational time required to optimize large-scale construction projects.}, subject = {Baubetrieb}, language = {en} } @inproceedings{RueppelKlauer2004, author = {Rueppel, Uwe and Klauer, Thomas}, title = {Internet-based Workflow-Management for Civil Engineering Projects}, doi = {10.25643/bauhaus-universitaet.164}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1647}, year = {2004}, abstract = {The growing competition pressure in the building industry increases the demands on the design and construction processes in respect to economical, technical and time aspects. These demands require efficient improvements of the value-added chain, which can be realized mainly with the usage of innovative information- and communication-technologies. To support the collaboration of all participants involved in a certain building project the Workflow-Management-System "BauKom-Online" has been developed. In the focus of the system is to support the coordination of the participants and their information exchange. Such a software-method is well suited to ensure a high quality planning process. The modelling of business-processes enables a better self-comprehension of the participants work and helps to enhance the project performance. The system architecture of BauKom-Online contains two basic components: the processmodelling tool and the workflow-engine. The process-model contains of activities and states of the planning and construction processes and their relations. These connected processes compose the workflow. Such a process-model for engineering purposes has to satisfy several needs, e.g., the consideration of planning and building alternatives, dynamic changes of the model during execution of the project and the linkage to further technical objects like costs, building structure, specifications and documentmanagement. Furthermore, the scheduling of the project can be done within the process-model and can be visualized as a Gantt-diagram. ...}, subject = {Baubetrieb}, language = {en} } @inproceedings{RueppelGutzke2004, author = {Rueppel, Uwe and Gutzke, Thomas}, title = {Groundwater-Monitoring based on dynamic co-operative eGovernment-Processes}, doi = {10.25643/bauhaus-universitaet.161}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1611}, year = {2004}, abstract = {As a result of the pilot-project "Grundwasser-Online" the supervision and the active controlling of large monitoring- and catchment-areas are realised by a co-operative integration of all related institutions, a synchronisation-process to combine all distributed data into one central server database, and a high-level eGovernment-Service to provide evaluated information over the internet. Based on this software system the local authorities are able to supervise the groundwater-levels and to find adequate decisions, which finally result in official permissions for the usage of groundwater-reservoirs by the water supply companies.}, subject = {Baubetrieb}, language = {en} } @inproceedings{FreundtBeucke2004, author = {Freundt, Martin and Beucke, Karl}, title = {A flexible model for scheduling building processes based on graph theory and fuzzy numbers}, doi = {10.25643/bauhaus-universitaet.158}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1587}, year = {2004}, abstract = {The methods currently used for scheduling building processes have some major advantages as well as disadvantages. The main advantages are the arrangement of the tasks of a project in a clear, easily readable form and the calculation of valuable information like critical paths. The main disadvantage on the other hand is the inflexibility of the model caused by the modeling paradigms. Small changes of the modeled information strongly influence the whole model and lead to the need to change many more details in the plan. In this article an approach is introduced allowing the creation of more flexible schedules. It aims towards a more robust model that lowers the need to change more than a few information while being able to calculate the important propositions of the known models and leading to further valuable conclusions.}, subject = {Baubetrieb}, language = {en} } @inproceedings{PerevalovaPahl2004, author = {Perevalova, Julia and Pahl, Peter Jan}, title = {Structural and Functional Dependence of Objects in Data Bases}, doi = {10.25643/bauhaus-universitaet.168}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1683}, year = {2004}, abstract = {Let the information of a civil engineering application be decomposed into objects of a given set of classes. Then the set of objects forms the data base of the application. The objects contain attributes and methods. Properties of the objects are stored in the attributes. Algorithms which the objects perform are implemented in the methods of the objects. If objects are modified by a user, the consistency of data in the base is destroyed. The data base must be modified in an update to restore its consistency. The sequence of the update operations is not arbitrary, but is governed by dependence between the objects. The situation can be described mathematically with graph theory. The available algorithms for the determination of the update sequence are not suitable when the data base is large. A new update algorithm for large data bases has been developed and is presented in this paper.}, subject = {Baubetrieb}, language = {en} } @inproceedings{KopytoPetersenDiaz2004, author = {Kopyto, Martin and Petersen, Michael and Diaz, Joaquin}, title = {Cost and Schedule Controlling in Relation to Liquidity Management during Construction Projects}, doi = {10.25643/bauhaus-universitaet.159}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1599}, year = {2004}, abstract = {The present paper describes a software application which can be used for relating the scheduled events of a construction project with the respective financial parameters, leading to an overall improvement in general controlling and liquidity management. For this purpose, existing construction schedules are taken and details of the assignment are recorded. Thus it becomes possible to assess a future payment status should changes in the designated schedule occur.}, subject = {Baubetrieb}, language = {en} } @inproceedings{BaitschHartmann, author = {Baitsch, Matthias and Hartmann, Dietrich}, title = {A FRAMEWORK FOR THE INTERACTIVE VISUALIZATION OF ENGINEERING MODELS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2919}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29194}, pages = {9}, abstract = {Interactive visualization based on 3D computer graphics nowadays is an indispensable part of any simulation software used in engineering. Nevertheless, the implementation of such visualization software components is often avoided in research projects because it is a challenging and potentially time consuming task. In this contribution, a novel Java framework for the interactive visualization of engineering models is introduced. It supports the task of implementing engineering visualization software by providing adequate program logic as well as high level classes for the visual representation of entities typical for engineering models. The presented framework is built on top of the open source visualization toolkit VTK. In VTK, a visualization model is established by connecting several filter objects in a so called visualization pipeline. Although designing and implementing a good pipeline layout is demanding, VTK does not support the reuse of pipeline layouts directly. Our framework tailors VTK to engineering applications on two levels. On the first level it adds new - engineering model specific - filter classes to VTK. On the second level, ready made pipeline layouts for certain aspects of engineering models are provided. For instance there is a pipeline class for one-dimensional elements like trusses and beams that is capable of showing the elements along with deformations and member forces. In order to facilitate the implementation of a graphical user interface (GUI) for each pipeline class, there exists a reusable Java Swing GUI component that allows the user to configure the appearance of the visualization model. Because of the flexible structure, the framework can be easily adapted and extended to new problem domains. Currently it is used in (i) an object-oriented p-version finite element code for design optimization, (ii) an agent based monitoring system for dam structures and (iii) the simulation of destruction processes by controlled explosives based on multibody dynamics. Application examples from all three domains illustrates that the approach presented is powerful as well as versatile.}, subject = {Architektur }, language = {en} } @inproceedings{Eickelkamp, author = {Eickelkamp, Jens Peter}, title = {LIQUIDIT{\"A}TSPLANUNG VON BAUPROJEKTEN}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2948}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29483}, pages = {12}, abstract = {Die Liquidit{\"a}tsplanung von Bauunternehmen XE "Liquidit{\"a}tsplanung" gilt als ein wesentliches Steuerungs-, Kontroll- sowie Informationsinstrument f{\"u}r interne und externe Adressaten und {\"u}bt eine Entscheidungsunterst{\"u}tzungsfunktion aus. Da die einzelnen Bauprojekte einen wesentlichen Anteil an den Gesamtkosten des Unternehmens ausmachen, besitzen diese auch einen erheblichen Einfluß auf die Liquidit{\"a}t und die Zahlungsf{\"a}higkeit der Bauunternehmung. Dem folgend ist es in der Baupraxis eine {\"u}bliche Verfahrensweise, die Liquidit{\"a}tsplanung zuerst projektbezogen zu erstellen und anschließend auf Unternehmensebene zu verdichten. Ziel der Ausf{\"u}hrungen ist es, die Zusammenh{\"a}nge von Arbeitskalkulation XE "Arbeitskalkulation" , Ergebnisrechnung XE "Ergebnisrechnung" und Finanzrechnung XE "Finanzrechnung" in Form eines deterministischen XE "Erkl{\"a}rungsmodells" Planungsmodells auf Projektebene darzustellen. Hierbei soll das Verst{\"a}ndnis und die Bedeutung der Verkn{\"u}pfungen zwischen dem technisch-orientierten Bauablauf und dessen Darstellung im Rechnungs- und Finanzwesen herausgestellt werden. Die Vorg{\"a}nge aus der Bauabwicklung, das heißt die Abarbeitung der Bauleistungsverzeichnispositionen und deren zeitliche Darstellung in einem Bauzeitenplan sind periodisiert in Gr{\"o}ßen der Betriebsbuchhaltung (Leistung, Kosten) zu transformieren und anschließend in der Finanzrechnung (Einzahlungen., Auszahlungen) nach Kreditoren und Debitoren aufzuschl{\"u}sseln.}, subject = {Architektur }, language = {de} } @inproceedings{StoimenovaLinsDatchevaetal., author = {Stoimenova, Eugenia and Lins, Yvonne and Datcheva, Maria and Schanz, Tom}, title = {INVERSE MODELLING OF SOIL HYDRAULIC CHARACTERISTIC FUNCTIONS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2985}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29858}, pages = {12}, abstract = {In this paper we evaluate 2D models for soil-water characteristic curve (SWCC), that incorporate the hysteretic nature of the relationship between volumetric water content θ and suction ψ. The models are based on nonlinear least squares estimation of the experimental data for sand. To estimate the dependent variable θ the proposed models include two independent variables, suction and sensors reading position (depth d in the column test). The variable d represents not only the position where suction and water content are measured but also the initial suction distribution before each of the hydraulic loading test phases. Due to this the proposed 2D regression models acquire the advantage that they: (a) can be applied for prediction of θ for any position along the column and (b) give the functional form for the scanning curves.}, subject = {Architektur }, language = {en} } @inproceedings{SchapkeSchererKatranuschkov, author = {Schapke, Sven-Eric and Scherer, Raimar J. and Katranuschkov, Peter}, title = {SEMANTIC SERVICE ENVIRONMENTS FOR INTEGRATING TEXT WITH MODEL-BASED INFORMATION IN AEC/FM}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3012}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30125}, pages = {10}, abstract = {In distributed project organisations and collaboration there is a need for integrating unstructured self-contained text information with structured project data. We consider this a process of text integration in which various text technologies can be used to externalise text content and consolidate it into structured information or flexibly interlink it with corresponding information bases. However, the effectiveness of text technologies and the potentials of text integration greatly vary with the type of documents, the project setup and the available background knowledge. The goal of our research is to establish text technologies within collaboration environments to allow for (a) flexibly combining appropriate text and data management technologies, (b) utilising available context information and (c) the sharing of text information in accordance to the most critical integration tasks. A particular focus is on Semantic Service Environments that leverage on Web service and Semantic Web technologies and adequately support the required systems integration and parallel processing of semi-structured and structured information. The paper presents an architecture for text integration that extends Semantic Service Environments with two types of integration services. Backbone to the Information Resource Sharing and Integration Service is a shared environment ontology that consolidates information on the project context and the available model, text and general linguistic resources. It also allows for the configuration of Semantic Text Analysis and Annotation Services to analyse the text documents as well as for capturing the discovered text information and sharing it through semantic notification and retrieval engines. A particular focus of the paper is the definition of the overall integration process configuring a complementary set of analyses and information sharing components.}, subject = {Architektur }, language = {en} } @inproceedings{TrummerDenzlerSuesse, author = {Trummer, Michael and Denzler, J. and S{\"u}ße, Herbert}, title = {PRECISE 3D MEASUREMENT WITH STANDARD MEANS AND MINIMIAL USER INTERACTION - EXTENDED SINGLE-VIEW RECONSTRUCTION}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3028}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30282}, pages = {8}, abstract = {The paper proposes a new method for general 3D measurement and 3D point reconstruction. Looking at its features, the method explicitly aims at practical applications. These features especially cover low technical expenses and minimal user interaction, a clear problem separation into steps that are solved by simple mathematical methods (direct, stable and optimal with respect to least error squares), and scalability. The method expects the internal and radial distortion parameters of the used camera(s) as inputs, and a plane quadrangle with known geometry within the scene. At first, for each single picture the 3D position of the reference quadrangle (with respect to each camera coordinate frame) is calculated. These 3D reconstructions of the reference quadrangle are then used to yield the relative external parameters of each camera regarding the first one. With known external parameters, triangulation is finally possible. The differences from other known procedures are outlined, paying attention to the stable mathematical methods (no usage of nonlinear optimization) and the low user interaction with good results at the same time.}, subject = {Architektur }, language = {en} } @inproceedings{MisyuraVolkova, author = {Misyura, E. and Volkova, Viktorija}, title = {APPLICATION OF THE MATHEMATICAL METHODS TO INVESTIGATION OF DYNAMICAL PROPERTIES OF A CABLE}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3031}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30313}, pages = {7}, abstract = {The paper is devoted to the investigation of dynamical behavior of a cable under influence of various types of excitations. Such element has a low rigidity and is sensitive to dynamic effect. The structural scheme is a cable which ends are located at different level. The analysis of dynamical behavior of the cable under effect of kinematical excitation which is represented by the oscillations of the upper part of tower is given. The scheme of cable is accepted such, that lower end of an inclined cable is motionless. The motion of the upper end is assumed only in horizontal direction. The fourth-order Runge-Kutta method was realized in software. The fast Fourier transform was used for spectral analysis. Standard graphical software was adopted for presenting results of investigations. The mathematical model of oscillations of a cable was developed by the account of the viscous damping. The analysis of dynamical characteristics of a cable for various parameters of damping and kinematical excitation was carried out. The time series, spectral characteristics and amplitude-frequencies characteristics was obtained. The resonance amplitude for different oscillating regimes was estimated. It is noted that increasing of the coefficient of the viscous damping and decreasing of the amplitude of tower's oscillations reduces the value of the critical frequency and the resonant amplitudes.}, subject = {Architektur }, language = {en} } @inproceedings{KimuraMakinoMaegaitoetal., author = {Kimura, Atsushi and Makino, Y. and Maegaito, Kentaro and Suzuki, Osamu}, title = {ITERATION DYNAMICAL SYSTEMS OF DISCRETE LAPLACIANS ON THE PLANE LATTICE (II) (THE VISUAL IMPRESSIONS GIVEN BY DESIGN-PATTERNS)}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2973}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29731}, pages = {4}, abstract = {The present study was designed to investigate the underlying factors determining the visual impressions of design-patterns that have complex textures. Design-patterns produced by "the dynamical system defined by iterations of discrete Laplacians on the plane lattice" were adopted as stimuli because they were not only complex, but also defined mathematically. In the experiment, 21 graduate and undergraduate students sorted 102 design-patterns into several groups by visual impressions. Those 102 patterns were classified into 12 categories by the cluster analysis. The results showed that the regularity of pattern was a most efficient factor for determining visual impressions of design-pattern, and there were some correspondence between visual impressions and mathematical variables of design-pattern. Especially, the visual impressions were influenced greatly by the neighborhood, and less influenced by steps of iterations.}, subject = {Architektur }, language = {en} } @inproceedings{Faustino, author = {Faustino, Nelson}, title = {FISCHER DECOMPOSITION FOR DIFFERENCE DIRAC OPERATORS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2955}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29551}, pages = {10}, abstract = {We establish the basis of a discrete function theory starting with a Fischer decomposition for difference Dirac operators. Discrete versions of homogeneous polynomials, Euler and Gamma operators are obtained. As a consequence we obtain a Fischer decomposition for the discrete Laplacian. For the sake of simplicity we consider in the first part only Dirac operators which contain only forward or backward finite differences. Of course, these Dirac operators do not factorize the classic discrete Laplacian. Therefore, we will consider a different definition of a difference Dirac operator in the quaternionic case which do factorizes the discrete Laplacian.}, subject = {Architektur }, language = {en} } @inproceedings{SeidelGasserWerner, author = {Seidel, Tilman and Gasser, Ingenuin and Werner, Bodo}, title = {CAR FOLLOWING MODELS FOR PHENOMENONS ON THE HIGHWAY}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3018}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30187}, pages = {8}, abstract = {Car following models are used to describe the behavior of a number of cars on the road dependent on the distance to the car in front. We introduce a system of ordinary differential equations and perform a theoretical and numerical analysis in order to find solutions that reflect various traffic situations. We present three different variations of the model motivated by reality.}, subject = {Architektur }, language = {en} } @inproceedings{Shapiro, author = {Shapiro, Michael}, title = {ON HYPERHOLOMORPHIC POLYNOMIALS FOR THE CAUCHY-RIEMANN AND THE DIRAC OPERATORS OF CLIFFORD ANALYSIS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3020}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30201}, pages = {1}, abstract = {Clifford Analysis, hyperholomorphic polynomials, Taylor Series.}, subject = {Architektur }, language = {en} } @inproceedings{ErikssonKettunen, author = {Eriksson, Sirkka-Liisa and Kettunen, Jarkko}, title = {HYPERMONOGENIC POLYNOMIALS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2950}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29509}, pages = {22}, abstract = {It is well know that the power function is not monogenic. There are basically two ways to include the power function into the set of solutions: The hypermonogenic functions or holomorphic Cliffordian functions. L. Pernas has found out the dimension of the space of homogenous holomorphic Cliffordian polynomials of degree m, but his approach did not include a basis. It is known that the hypermonogenic functions are included in the space of holomorphic Cliffordian functions. As our main result we show that we can construct a basis for the right module of homogeneous holomorphic Cliffordian polynomials of degree m using hypermonogenic polynomials and their derivatives. To that end we first recall the function spaces of monogenic, hypermonogenic and holomorphic Cliffordian functions and give the results needed in the proof of our main theorem. We list some basic polynomials and their properties for the various function spaces. In particular, we consider recursive formulas, rules of differentiation and properties of linear independency for the polynomials.}, subject = {Architektur }, language = {en} } @inproceedings{DzwigonHempel, author = {Dzwigon, Wieslaw and Hempel, Lorenz}, title = {ZUR SYNCHRONISATION VON LINIEN IM {\"O}PNV}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2944}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29442}, pages = {12}, abstract = {Wir betrachten im {\"O}PNV ({\"O}ffentlichen Personennahverkehr) diejenige Situation, daß zwei Bus- oder Straßenbahnlinien gemeinsame Haltestellen haben. Ziel unserer Untersuchungen ist es, f{\"u}r beide Linien einen solchen Fahrplan zu finden, der f{\"u}r die Fahrg{\"a}ste m{\"o}glichst viel Bequemlichkeit bietet. Die Bedarfsstruktur - die Anzahl von Personen, die die beiden Linien benutzen - setzt dabei gewisse Beschr{\"a}nkungen f{\"u}r die Taktzeiten der beiden Linien. Die verbleibenden Entscheidungsfreiheiten sollen im Sinne der Zielstellung ausgenutzt werden. Im Vortrag wird folgenden Fragen nachgegangen: - nach welchen Kriterien kann man die "Bequemlichkeit" oder die "Synchonisationsg{\"u}te" messen? - wie kann man die einzelnen "Synchronisationsmaße" berechnen ? - wie kann man die verbleibenden Entscheidungsfreiheiten nutzen, um eine m{\"o}glichst gute Synchronisation zu erreichen ? Die Ergebnisse werden dann auf einige Beispiele angewandt und mit den bereitgestellten Methoden L{\"o}sungsvorschl{\"a}ge unterbreitet.}, subject = {Architektur }, language = {de} } @inproceedings{RogożaStachonUbysz, author = {Rogoża, Agnieszka and Stachon, T. and Ubysz, Andrzej}, title = {MODELLING THE PLASTIC HINGE IN THE STATICALLY INDETERMINABLE REINFORCED CONCRETE BAR ELEMENTS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3005}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30050}, pages = {6}, abstract = {The paper presents the example numerical model to calculate the reinforced concrete bar structures. Usually applied methods of structure dimensioning do not include the case of plastic hinges occurrence under the limit load of construction. The model represented by A. Borcz is based on the differential equation of deflection line of the beam and it includes the effects of rearrangement of the internal forces and reological effects. The experimental parameters obtained in earlier investigations describe effects resulting from the rise of plastic hinges in the proposed equation.}, subject = {Architektur }, language = {en} } @inproceedings{EngelkeSchuster, author = {Engelke, Gerald and Schuster, Otmar}, title = {OPENING THE RESERVE OF ECONOMIC EFFICIENCY IN LOGISTICAL AND FACILITY MANAGEMENT SERVICES}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3017}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30177}, pages = {8}, abstract = {In many branches companies often lose the visibility of their human and technical resources of their field service. On the one hand the people in the fieldservice are often free like kings on the other hand they do not take part of the daily communication in the central office and suffer under the lacking involvement in the decisions inside the central office. The result is inefficiency. Reproaches in both directions follow. With the radio systems and then mobile phones the ditch began to dry up. But the solutions are far from being productive.}, subject = {Architektur }, language = {en} } @inproceedings{SchererGrinewitschus, author = {Scherer, Klaus and Grinewitschus, Viktor}, title = {INTEGRIERTE SYSTEMBEDIENUNG IN GEB{\"A}UDEN: KOMPLEXE TECHNIK EINFACHER HANDHABEN}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3013}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30132}, pages = {7}, abstract = {R{\"a}ume und Geb{\"a}ude sind heute wegen der enormen Funktionalit{\"a}t der technischen Geb{\"a}udeausr{\"u}stung (TGA) in Kombination mit der sonstigen Ausstattung und den diversen Anwendungsprozessen und Nutzergruppen ohne innovative Konzepte der integrierten Bedienung kaum noch beherrschbar bzw. optimal nutzbar. Dies gilt sowohl f{\"u}r Wohn- als auch f{\"u}r Zweckimmobilien. Die Geb{\"a}udeleittechnik (GLT) und die Geb{\"a}udeautomation (GA) k{\"o}nnen hier unter sinnvoller Integration der M{\"o}glichkeiten der Mikroelektronik, Multimedia-, Kommunikations- und Informationstechnik erheblich zu nutzbringenden Innovationen beitragen. Die Automobilindustrie hat in den letzten Jahren gezeigt, wie durch einen integralen Systemansatz und durch Einsatz von Elektronik, Kommunikations- und Informationstechnik eine sinnvolle technische Assistenz der Anwender machbar ist. Genannt sei hier das Konzept des Cockpits mit integrierter Funktionsb{\"u}ndelung und der Informationskonzentration am Armaturenbrett. Im Gegensatz zum Automobil ist der Bereich der technischen Geb{\"a}udeausstattung in Wohn- und Nutzimmobilien gekennzeichnet durch eine starke Fragmentierung in unterschiedlichste Gewerke unter Beteiligung vieler oft schlecht koordinierter Akteure. Durch das Duisburger inHaus-Innovationszentrum f{\"u}r Intelligente Raum- und Geb{\"a}udesysteme der Fraunhofer-Gesellschaft wurden in den letzten Jahren neuartige Konzepte der Systemintegration heterogener Technik auf der Basis von Middleware-Plattformen und Multimedia-Technologien und -Ger{\"a}ten entwickelt, getestet und in die Anwendung getragen. Einer der ersten Systemanwendungen dieses offenen Infrastrukturkonzepts ist die integrierte Systembedienung mit zum Teil v{\"o}llig neuen Bedienkonzepten und einer starken Bedienungsvereinfachung auch komplexester Technikausr{\"u}stungen in Immobilien. Der Beitrag beschreibt nach einer Analyse der Ausgangslage die technologischen Grundz{\"u}ge der integrierten Systembedienung. Es folgen einige Anwendungsbeispiele und eine zusammenfassende Bewertung mit einem Ausblick auf weiterf{\"u}hrende Aktivit{\"a}ten.}, subject = {Architektur }, language = {de} } @inproceedings{WoszczynaKaminskiMajetal., author = {Woszczyna, Anna and Kaminski, Mieczysław and Maj, Marek and Ubysz, Andrzej}, title = {ANALYSING THE INFLUENCE OF THE REINFORCED CONCRETE CHIMNEY GEOMETRY CHANGES ON THE STRESSES IN THE CHIMNEY SHAFT}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3038}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30388}, pages = {7}, abstract = {Analysis of the reinforced concrete chimney geometry changes and their influence on the stresses in the chimney mantle was made. All the changes were introduced to a model chimney and compared. Relations between the stresses in the mantle of the chimney and the deformations determined by the change of the chimney's vertical axis geometry were investigated. The vertical axis of chimney was described by linear function (corresponding to the real rotation of the chimney together with the foundation), and by parabolic function (corresponding to the real dislocation of the chimney under the influence of the horizontal forces - wind). The positive stress pattern in the concrete as well as the negative stress pattern in the reinforcing steel have been presented. The two cases were compared. Analysis of the stress changes in the chimney mantle depending on the modification in the thickness of the mantle (the thickness of the chimney mantle was altered in the linear or the abrupt way) was carried out. The relation between the stresses and the chimney's diameter change from the bottom to the top of the chimney was investigated. All the analyses were conducted by means of a specially developed computer program created in Mathematica environment. The program makes it also possible to control calculations and to visualize the results of the calculations at every stage of the calculation process.}, subject = {Architektur }, language = {en} } @inproceedings{Siekierski, author = {Siekierski, Wojciech}, title = {VARIATION OF ROTATIONAL RESTRAINT IN GRID DECK CONNECTION DUE TO CORROSION DAMAGE AND STRENGTHENING}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3021}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30217}, pages = {8}, abstract = {The approach to assessment of rotational restraint of stringer-to-crossbeam connection in a deck of 100-year old steel truss bridge is presented. Sensitivity of rotational restraint coefficient of the connection to corrosion damage and strengthening is analyzed. Two criteria of the assessment of the rotational restraint coefficient are applied: static and kinematic one. The former is based on bending moment distribution in the considered member, the latter one - on the member rotation at the given joint. 2D-element model of finite element method is described: webs and flanges are modeled with shell elements, while rivets in the connection - with system of beam and spring elements. The method of rivet modeling is verified by T-stub connection test results published in literature. FEM analyses proved that recorded extent of corrosion damage does not alter the initial rotational restraint of stringer-to-crossbeam connection. Strengthening of stringer midspan influences midspan bending moment and stringer end rotation in a different way. Usually restoring member load bearing capacity means strengthening its critical regions (where the highest stress levels occur). This alters flexural stiffness distribution over member length and influences rotational restraint at its connection to other members. The impact depends on criterion chosen for rotational restraint coefficient assessment.}, subject = {Architektur }, language = {en} } @inproceedings{SchoenbergerHermann, author = {Sch{\"o}nberger, Karsten and Hermann, F.}, title = {COMPUTERGEST{\"U}TZTES PORTFOLIOMANAGEMENT - EIN PRAXISBEISPIEL}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3016}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30168}, pages = {10}, abstract = {Die Kommunale Wohnungsgesellschaft mbH Erfurt(KoWo) ist mit ihren rund 20.000 Wohnungen in der Landeshauptstadt das gr{\"o}ßte Wohnungsunternehmen in Th{\"u}ringen. Der Immobilienbestand ist heterogen in seinem technischen Zustand und im Bezug auf die unterschiedlichen Lagen der Objekte. Bedingt durch Leerst{\"a}nde und unterschiedliche Modernisierungsmaßnahmen und -st{\"a}nde unterscheidet sich die Wirtschaftlichkeit verschiedener Objekte deutlich. Ohne eine einheitliche Einwertung des Immobilienbestandes im Bezug auf die Objektattraktivit{\"a}t, die Standortqualit{\"a}t und die Objektwirtschaftlichkeit f{\"a}llt eine langfristige strategische Entwicklung des Immobilienportfolios schwer. {\"U}ber die Schritte der technischen Bestandserfassung, die Einwertung {\"u}ber ein Scorintmodell, die Abbildung in einem Portfoliomodell mit zugeh{\"o}riger Normstrategie bis hin zur Weiterverarbeitung der Daten in der 20-j{\"a}hrigen Instandsetzungsplanung wird praxisnah aufgezeigt, wie die Vorgehensweise bei der Einwertung des Immobilienportfolios ist.}, subject = {Architektur }, language = {de} } @inproceedings{SchererGrinewitschus, author = {Scherer, Klaus and Grinewitschus, Viktor}, title = {AMBIENT INTELLIGENCE IN RAUM UND BAU INNOVATIVE TECHNIKASSISTENZ F{\"U}R FACILITY MANAGEMENT UND ANWENDUNG}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2914}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29140}, pages = {9}, abstract = {Mikroelektronik und Mikrosystemtechnik in Kombination mit Informations- und Kommunikations-technik erlauben es mittlerweile, Rechenleistung und Kommunikationsf{\"a}higkeit in kleinsten Formaten, mit geringsten Energien und zu g{\"u}nstigen Preisen nutzbringend in unser privates und berufliches Umfeld einzubringen. Beispiele sind Notebook-PC, PDA, Handy und das Navigationßystem im Auto. Aber auch eingebettete Elektronik in Komponenten, Ger{\"a}ten und Systemen ist nunmehr zur Selbstverst{\"a}ndlichkeit geworden. Bekannte Beispiele aus der Haustechnik sind Mikroprozeßoren in Heizungs- und Alarmanlagen und aber auch in Komponenten wie Brand- und Bewegungsmelder. Wir n{\"a}hern uns dem vor einigen Jahren noch als Vision bezeichneten Zustand der {\"u}berall vorhandenen elektronischen Rechenleistung (engl. ubiquitous computing) bzw. des von Informationsverarbeitung durchdrungenen t{\"a}glichen Umfelds (engl. pervasive computing). Werden die TGA-Komponenten genau wie die gr{\"o}ßeren Computerkomponenten (z.B. PCs, Server) {\"u}ber Datenschnittstellen zu r{\"a}umlich verteilten Netzwerken verkn{\"u}pft (z.B. Internet, Intranet) und mit einer system{\"u}bergreifenden und ad{\"a}quaten Intelligenz (Software) programmiert, so k{\"o}nnen neuartige Funktionalit{\"a}ten im jeweiligen Anwendungsumfeld (engl. ambient intelligence, kurz AmI, [1]) entstehen. Hier liegt bei Geb{\"a}uden und R{\"a}umen speziell eine große Chance, die bislang einer ganzheitlichen Systemkonzeption unter Einschluß von Architektur, Geb{\"a}udephysik, technischer Geb{\"a}udeausr{\"u}stung (TGA) und Geb{\"a}udeautomation (GA) im Wege stehende Gewerketrennung zu {\"u}berwinden. Es entstehen f{\"u}r div. Anwendungszwecke systemisch integrierte >smart areas< (nach Prof. Becker, FH Biberach). Im vorliegenden Beitrag erl{\"a}uterte Beispiele f{\"u}r AmI-L{\"o}sungen im Immobilienbereich sind Raumsysteme zur automatischen und sicheren Erkennung von Notf{\"a}llen, z.B. in Pflegeheimen; sich automatisch an die Nutzung und den Nutzer bzgl. Klima und Beleuchtung adaptierende Raumsysteme im B{\"u}ro- oder Hotelbereich und die elektronische Aßistenz des Bau- und Betriebsprozeßes von Geb{\"a}uden. Im Duisburger inHaus-Innovationszentrum f{\"u}r Intelligente Raum- und Geb{\"a}udesysteme der Fraunhofer-Gesellschaft wurden in den letzten Jahren erste L{\"o}sungen mit diesem neuartigen Ansatz konzipiert, entwickelt und erprobt. Der Beitrag beschreibt nach einer kurzen Skizzierung des Ambient-Intelligence-Ansatzes an Beispielen M{\"o}glichkeiten f{\"u}r den Transfer dieser neuen Technologie in den Raum- und Geb{\"a}udebereich. Es folgt eine abschließende Zusammenfaßung und eine Einsch{\"a}tzung der Zukunftspotenziale der Ambient Intelligence in Raum und Bau.}, subject = {Architektur }, language = {de} } @inproceedings{ErlemannHartmann, author = {Erlemann, Kai and Hartmann, Dietrich}, title = {PARALLELIZATION OF A MICROSCOPIC TRAFFIC SIMULATION SYSTEM USING MPIJAVA}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2951}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29516}, pages = {8}, abstract = {Traffic simulation is a valuable tool for the design and evaluation of road networks. Over the years, the level of detail to which urban and freeway traffic can be simulated has increased steadily, shifting from a merely qualitative macroscopic perspective to a very detailed microscopic view, where the behavior of individual vehicles is emulated realistically. With the improvement of behavioral models, however, the computational complexity has also steadily increased, as more and more aspects of real-life traffic have to be considered by the simulation environment. Despite the constant increase in computing power of modern personal computers, microscopic simulation stays computationally expensive, limiting the maximum network size than can be simulated on a single-processor computer in reasonable time. Parallelization can distribute the computing load from a single computer system to a cluster of several computing nodes. To this end, the exisiting simulation framework had to be adapted to allow for a distributed approach. As the simulation is ultimately targeted to be executed in real-time, incorporating real traffic data, only a spatial partition of the simulation was considered, meaning the road network has to be partitioned into subnets of comparable complexity, to ensure a homogenous load balancing. The partition process must also ensure, that the division between subnets does only occur in regions, where no strong interaction between the separated road segments occurs (i.e. not in the direct vicinity of junctions). In this paper, we describe a new microscopic reasoning voting strategy, and discuss in how far the increasing computational costs of these more complex behaviors lend themselves to a parallelized approach. We show the parallel architecture employed, the communication between computing units using MPIJava, and the benefits and pitfalls of adapting a single computer application to be used on a multi-node computing cluster.}, subject = {Architektur }, language = {en} } @inproceedings{Muschalla, author = {Muschalla, Dirk}, title = {OPTIMIZATION OF WATER RESOURCES SYSTEMS USING MULTI-OBJECTIVE EVOLUTION STRATEGIES}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2995}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29953}, pages = {10}, abstract = {This paper deals with the development of a new multi-objective evolution strategy in combination with an integrated pollution-load and water-quality model. The optimization algorithm combines the advantages of the Non-Dominated Sorting Genetic Algorithm and Self-Adaptive Evolution Strategies. The identification of a good spread of solutions on the pareto-optimum front and the optimization of a large number of decision variables equally demands numerous simulation runs. In addition, statements with regard to the frequency of critical concentrations and peak discharges require continuous long-term simulations. Therefore, a fast operating integrated simulation model is needed providing the required precision of the results. For this purpose, a hydrological deterministic pollution-load model has been coupled with a river water-quality and a rainfall-runoff model. Wastewater treatment plants are simulated in a simplified way. The functionality of the optimization and simulation tool has been validated by analyzing a real catchment area including sewer system, WWTP, water body and natural river basin. For the optimization/rehabilitation of the urban drainage system, both innovative and approved measures have been examined and used as decision variables. As objective functions, investment costs and river water quality criteria have been used.}, subject = {Architektur }, language = {en} } @inproceedings{EblingScheuermann, author = {Ebling, Julia and Scheuermann, G.}, title = {TEMPLATE MATCHING ON VECTOR FIELDS USING CLIFFORD ALGEBRA}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2946}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29464}, pages = {25}, abstract = {Due to the amount of flow simulation and measurement data, automatic detection, classification and visualization of features is necessary for an inspection. Therefore, many automated feature detection methods have been developed in recent years. However, only one feature class is visualized afterwards in most cases, and many algorithms have problems in the presence of noise or superposition effects. In contrast, image processing and computer vision have robust methods for feature extraction and computation of derivatives of scalar fields. Furthermore, interpolation and other filter can be analyzed in detail. An application of these methods to vector fields would provide a solid theoretical basis for feature extraction. The authors suggest Clifford algebra as a mathematical framework for this task. Clifford algebra provides a unified notation for scalars and vectors as well as a multiplication of all basis elements. The Clifford product of two vectors provides the complete geometric information of the relative positions of these vectors. Integration of this product results in Clifford correlation and convolution which can be used for template matching of vector fields. For frequency analysis of vector fields and the behavior of vector-valued filters, a Clifford Fourier transform has been derived for 2D and 3D. Convolution and other theorems have been proved, and fast algorithms for the computation of the Clifford Fourier transform exist. Therefore the computation of Clifford convolution can be accelerated by computing it in Clifford Fourier domain. Clifford convolution and Fourier transform can be used for a thorough analysis and subsequent visualization of flow fields.}, subject = {Architektur }, language = {en} } @inproceedings{EbertLenzen, author = {Ebert, Carsten and Lenzen, Armin}, title = {OUTPUT-ONLY ANALYSIS FOR EXPERIMENTAL DAMAGE DETECTION OF A TIED-ARCH BRIDGE}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2945}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29452}, pages = {13}, abstract = {In civil engineering it is very difficult and often expensive to excite constructions such as bridges and buildings with an impulse hammer or shaker. This problem can be avoided with the output-only method as special feature of stochastic system identification. The permanently existing ambient noise (e.g. wind, traffic, waves) is sufficient to excite the structures in their operational conditions. The output-only method is able to estimate the observable part of a state-space-model which contains the dynamic characteristics of the measured mechanical system. Because of the assumption that the ambient excitation is white there is no requirement to measure the input. Another advantage of the output-only method is the possibility to get high detailed models by a special method, called polyreference setup. To pretend the availability of a much larger set of sensors the data from varying sensor locations will be collected. Several successive data sets are recorded with sensors at different locations (moving sensors) and fixed locations (reference sensors). The covariance functions of the reference sensors are bases to normalize the moving sensors. The result of the following subspace-based system identification is a high detailed black-box-model that contains the weighting function including the well-known dynamic parameters eigenfrequencies and mode shapes of the mechanical system. Emphasis of this lecture is the presentation of an extensive damage detection experiment. A 53-year old prestressed concrete tied-arch-bridge in H{\"u}nxe (Germany) was deconstructed in 2005. Preliminary numerous vibration measurements were accomplished. The first experiment for system modification was an additional support near the bridge bearing of one main girder. During a further experiment one hanger from one tied arch was cut through as an induced damage. Some first outcomes of the described experiments will be presented.}, subject = {Architektur }, language = {en} } @inproceedings{SampaioHenriquesStuderetal., author = {Sampaio, Alcinia Zita and Henriques, Pedro and Studer, P. and Luizi, Rui}, title = {VIRTUAL REALITY TECHNOLOGY TO REPRESENT CONSTRUCTION ACTIVITIES}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30090}, pages = {9}, abstract = {The use of virtual reality techniques in the development of educational applications brings new perspectives to the teaching of subjects related to the field of civil construction in Civil Engineering domain. In order to obtain models, which would be able to visually simulate the construction process of two types of construction work, the research turned to the techniques of geometric modelling and virtual reality. The applications developed for this purpose are concerned with the construction of a cavity wall and a bridge. These models make it possible to view the physical evolution of the work, to follow the planned construction sequence and to visualize details of the form of every component of the works. They also support the study of the type and method of operation of the equipment necessary for these construction procedures. These models have been used to distinct advantage as educational aids in first-degree courses in Civil Engineering. Normally, three-dimensional geometric models, which are used to present architectural and engineering works, show only their final form, not allowing the observation of their physical evolution. The visual simulation of the construction process needs to be able to produce changes to the geometry of the project dynamically. In the present study, two engineering construction work models were created, from which it was possible to obtain three-dimensional models corresponding to different states of their form, simulating distinct stages in their construction. Virtual reality technology was applied to the 3D models. Virtual reality capacities allow the interactive real-time viewing of 3D building models and facilitate the process of visualizing, evaluating and communicating.}, subject = {Architektur }, language = {en} } @inproceedings{BrackxDeSchepperSommen, author = {Brackx, Fred and De Schepper, Nele and Sommen, Frank}, title = {Clifford-Hermite and Two-Dimensional Clifford-Gabor Filters For Early Vision}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2930}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29303}, pages = {22}, abstract = {Image processing has been much inspired by the human vision, in particular with regard to early vision. The latter refers to the earliest stage of visual processing responsible for the measurement of local structures such as points, lines, edges and textures in order to facilitate subsequent interpretation of these structures in higher stages (known as high level vision) of the human visual system. This low level visual computation is carried out by cells of the primary visual cortex. The receptive field profiles of these cells can be interpreted as the impulse responses of the cells, which are then considered as filters. According to the Gaussian derivative theory, the receptive field profiles of the human visual system can be approximated quite well by derivatives of Gaussians. Two mathematical models suggested for these receptive field profiles are on the one hand the Gabor model and on the other hand the Hermite model which is based on analysis filters of the Hermite transform. The Hermite filters are derivatives of Gaussians, while Gabor filters, which are defined as harmonic modulations of Gaussians, provide a good approximation to these derivatives. It is important to note that, even if the Gabor model is more widely used than the Hermite model, the latter offers some advantages like being an orthogonal basis and having better match to experimental physiological data. In our earlier research both filter models, Gabor and Hermite, have been developed in the framework of Clifford analysis. Clifford analysis offers a direct, elegant and powerful generalization to higher dimension of the theory of holomorphic functions in the complex plane. In this paper we expose the construction of the Hermite and Gabor filters, both in the classical and in the Clifford analysis framework. We also generalize the concept of complex Gaussian derivative filters to the Clifford analysis setting. Moreover, we present further properties of the Clifford-Gabor filters, such as their relationship with other types of Gabor filters and their localization in the spatial and in the frequency domain formalized by the uncertainty principle.}, subject = {Architektur }, language = {en} } @inproceedings{BrackxDeKnockDeSchepper, author = {Brackx, Fred and De Knock, B. and De Schepper, Hennie}, title = {A MULTI--DIMENSIONAL HILBERT TRANSFORM IN ANISOTROPIC CLIFFORD ANALYSIS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2929}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29297}, pages = {15}, abstract = {In earlier research, generalized multidimensional Hilbert transforms have been constructed in m-dimensional Euclidean space, in the framework of Clifford analysis. Clifford analysis, centred around the notion of monogenic functions, may be regarded as a direct and elegant generalization to higher dimension of the theory of the holomorphic functions in the complex plane. The considered Hilbert transforms, usually obtained as a part of the boundary value of an associated Cauchy transform in m+1 dimensions, might be characterized as isotropic, since the metric in the underlying space is the standard Euclidean one. In this paper we adopt the idea of a so-called anisotropic Clifford setting, which leads to the introduction of a metric dependent m-dimensional Hilbert transform, showing, at least formally, the same properties as the isotropic one. The Hilbert transform being an important tool in signal analysis, this metric dependent setting has the advantage of allowing the adjustment of the co-ordinate system to possible preferential directions in the signals to be analyzed. A striking result to be mentioned is that the associated anisotropic (m+1)-dimensional Cauchy transform is no longer uniquely determined, but may stem from a diversity of (m+1)-dimensional "mother" metrics.}, subject = {Architektur }, language = {en} } @inproceedings{BrackxDeSchepperDeSchepperetal., author = {Brackx, Fred and De Schepper, Hennie and De Schepper, Nele and Sommen, Frank}, title = {HERMITIAN CLIFFORD-HERMITE WAVELETS}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2931}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29313}, pages = {13}, abstract = {The one-dimensional continuous wavelet transform is a successful tool for signal and image analysis, with applications in physics and engineering. Clifford analysis offers an appropriate framework for taking wavelets to higher dimension. In the usual orthogonal case Clifford analysis focusses on monogenic functions, i.e. null solutions of the rotation invariant vector valued Dirac operator ∂, defined in terms of an orthogonal basis for the quadratic space Rm underlying the construction of the Clifford algebra R0,m. An intrinsic feature of this function theory is that it encompasses all dimensions at once, as opposed to a tensorial approach with products of one-dimensional phenomena. This has allowed for a very specific construction of higher dimensional wavelets and the development of the corresponding theory, based on generalizations of classical orthogonal polynomials on the real line, such as the radial Clifford-Hermite polynomials introduced by Sommen. In this paper, we pass to the Hermitian Clifford setting, i.e. we let the same set of generators produce the complex Clifford algebra C2n (with even dimension), which we equip with a Hermitian conjugation and a Hermitian inner product. Hermitian Clifford analysis then focusses on the null solutions of two mutually conjugate Hermitian Dirac operators which are invariant under the action of the unitary group. In this setting we construct new Clifford-Hermite polynomials, starting in a natural way from a Rodrigues formula which now involves both Dirac operators mentioned. Due to the specific features of the Hermitian setting, four different types of polynomials are obtained, two types of even degree and two types of odd degree. These polynomials are used to introduce a new continuous wavelet transform, after thorough investigation of all necessary properties of the involved polynomials, the mother wavelet and the associated family of wavelet kernels.}, subject = {Architektur }, language = {en} } @inproceedings{WittwerBecker, author = {Wittwer, Christof and Becker, Rainer}, title = {MODELLBASIERTE ERTRAGSKONTROLLE F{\"U}R PV ANLAGEN IN VERNETZTEN GEB{\"A}UDEN}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.3036}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30363}, pages = {5}, abstract = {Subject of the paper is the realisation of a model based efficiency control system for PV generators using a simulation model. A standard 2-diodes model of PV generator is base of the ColSim model, which is implemented in ANSI C code for flexible code exporting. The algorithm is based on discretisized U-I characteristics, which allows the calculation of string topologies witch parallel and serial PV cells and modules. Shadowing effects can be modelled down to cell configuration using polar horizon definitions. The simulation model was ported to a real time environment, to calculate the efficiency of a PV system. Embedded System technology allows the networked operation and the integration of standard I/O devices. Futher work focus on the adaption of shadowing routine, which will be adapted to get the environment conditions from the real operation.}, subject = {Architektur }, language = {de} } @inproceedings{Geyer, author = {Geyer, Philipp}, title = {MODELS FOR MULTIDISCIPLINARY DESIGN OPTIMIZATION: AN EXEMPLARY OFFICE BUILDING}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2957}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29574}, pages = {10}, abstract = {The mathematical and technical foundations of optimization have been developed to a large extent. In the design of buildings, however, optimization is rarely applied because of insufficient adaptation of this method to the needs of building design. The use of design optimization requires the consideration of all relevant objectives in an interactive and multidisciplinary process. Disciplines such as structural, light, and thermal engineering, architecture, and economics impose various objectives on the design. A good solution calls for a compromise between these often contradictory objectives. This presentation outlines a method for the application of Multidisciplinary Design Optimization (MDO) as a tool for the designing of buildings. An optimization model is established considering the fact that in building design the non-numerical aspects are of major importance than in other engineering disciplines. A component-based decomposition enables the designer to manage the non-numerical aspects in an interactive design optimization process. A fa{\c{c}}ade example demonstrates a way how the different disciplines interact and how the components integrate the disciplines in one optimization model. In this grid-based fa{\c{c}}ade example, the materials switch between a discrete number of materials and construction types. For light and thermal engineering, architecture, and economics, analysis functions calculate the performance; utility functions serve as an important means for the evaluation since not every increase or decrease of a physical value improves the design. For experimental purposes, a genetic algorithm applied to the exemplary model demonstrates the use of optimization in this design case. A component-based representation first serves to manage non-numerical characteristics such as aesthetics. Furthermore, it complies with usual fabrication methods in building design and with object-oriented data handling in CAD. Therefore, components provide an important basis for an interactive MDO process in building design.}, subject = {Architektur }, language = {en} } @inproceedings{HildebrandWudtkeWerner, author = {Hildebrand, J{\"o}rg and Wudtke, Idna and Werner, Frank}, title = {M{\"O}GLICHKEITEN DER MATHEMATISCHEN BESCHREIBUNG VON PHASENUMWANDLUNGEN IM STAHL BEI SCHWEIß- UND WIG-NACHBEHANDLUNGSPROZESSEN}, editor = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet.2968}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29684}, pages = {13}, abstract = {In the final decades many scientists were occupied intensively with the change of materials during a process and their mathematical descriptions. The extensive and extensive analyses were supported by the advanced computer science. A mathematical description of the phase transformation is a condition for a realistic FE simulation of the state of microstructure. It is possible to simulate the temperature and stress field also in complex construction based on the state of microstructure. In the last years a great number of mathematical models were expanded to describe the transformation between different phases. For the development of the models for transformation kinetics it is practical to subdivide into isothermal and non-isothermal processes according to the thermal conditions. Some models for the description of the transformation with non-isothermal processes represent extensions for isothermal of processes. A part of parameters for the describing equations can be derived from the time-temperature-transformation diagrams in the literature. Furthermore the two possibilities of transformation are considered by different models - diffusion controlled and not diffusion controlled. The material-specific characteristics can be simulated during the transformation for each individual phase in a realistic FE analyses. Also new materials can be simulated after a modification of the parameters in the describing equations for the phase transformation. The effects in the temperature and stress field are a substantial reason for the investigation of the phase transformation during the welding and TIG-dressing processes.}, subject = {Architektur }, language = {de} }