@inproceedings{HsiehChenShyu2004, author = {Hsieh, Shang-Hsien and Chen, Chuin-Shan and Shyu, Hsin-Yih}, title = {On Computer-Aided Instruction Tools for Teaching College Engineering Mechanics Related Courses}, doi = {10.25643/bauhaus-universitaet.92}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-926}, year = {2004}, abstract = {In this research, questionnaires are designed to survey among teachers and students the current situation of applying Computer-Aided Instruction (CAI) tools to teaching and learning of college engineering mechanics related courses in Taiwan. The needs for CAI tools for teaching these mechanics related courses are investigated in the survey. Several prototypes of interactive multimedia tools are designed and implemented using information technologies. The applicability and effectiveness of these tools on assisting teaching of engineering mechanics related courses are discussed and evaluated. Moreover, a website for managing and sharing collected and developed CAI resources is constructed.}, subject = {Bautechnik}, language = {en} } @inproceedings{MundaniBungartz2004, author = {Mundani, Ralf-Peter and Bungartz, Hans-Joachim}, title = {Octrees for Cooperative Work in a Network-Based Environment}, doi = {10.25643/bauhaus-universitaet.146}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1460}, year = {2004}, abstract = {Assuring global consistency in a cooperative working environment is the main focus of many nowaday research projects in the field of civil engineering and others. In this paper, a new approach based on octrees will be discussed. It will be shown that by the usage of octrees not only the management and control of processes in a network-based working environment can be optimised but also an efficient integration platform for processes from various disciplines - such as architecture and civil engineering - can be provided. By means of an octree-based collision detection resp. consistency assurance a client-server-architecture will be described as well as sophisticated information services for a further support of cooperative work.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{BaitschHartmann2004, author = {Baitsch, Matthias and Hartmann, Dietrich}, title = {Object Oriented Finite Element Analysis for Structural Optimization using p-Elements}, doi = {10.25643/bauhaus-universitaet.108}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1089}, year = {2004}, abstract = {The optimization of continuous structures requires careful attention to discretization errors. Compared to ordinary low order formulation (h-elements) in conjunction with an adaptive mesh refinement in each optimization step, the use of high order finite elements (so called p-elements) has several advantages. However, compared to the h-method a higher order finite element analysis program poses higher demands from a software engineering point of view. In this article the basics of an object oriented higher order finite element system especially tailored to the use in structural optimization is presented. Besides the design of the system, aspects related to the employed implementation language Java are discussed.}, subject = {Konzipieren }, language = {en} } @inproceedings{Suzuki2004, author = {Suzuki, Aketo}, title = {Numerical Analysis for Prediction as to Influence of Digging a Tunnel on Groundwater}, doi = {10.25643/bauhaus-universitaet.113}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1133}, year = {2004}, abstract = {This paper describes monitoring of the in-valley discharge and underground water level at the place where the tunnel will be constructed and also, the numerical analysis for prediction applying the Tank Model and Linear Filter Method to calculate the prediction. The application of these analyses has actually allowed the change of underground water level to be grasped and more effective information system to be established by comparing the real-time monitoring data with the real-time calculation of prediction.}, subject = {Mobile Computing}, language = {en} } @inproceedings{MelhemCheng2004, author = {Melhem, Hani and Cheng, Yousheng}, title = {Numeric Prediction Algorithms for Bridge Corrosion}, doi = {10.25643/bauhaus-universitaet.198}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1982}, year = {2004}, abstract = {The research reported in this article was conducted to mainly explore the two common numeric prediction techniques, the model tree and the regression tree, when used in conjunction with bagging as a wrapper method. Bagging is used to improve the prediction accuracy of these two algorithms, and results are compared with the ones obtained earlier by the k-nearest neighbor (KNN) algorithm. From the conducted experiments, both the bagged regression tree and bagged model tree produce better results than not only their corresponding regression tree and model tree alone, but also the KNN with optimal value of k equal to 7. In addition, the bagged model tree yields the lowest prediction errors and a highest correlation coefficient of 0.81. It is demonstrated that it is feasible to use the bagged model tree for engineering applications in prediction problems such as estimating the remaining service life of bridge decks.}, subject = {Hochschulbildung}, language = {en} } @inproceedings{LiuSoibelmanTrupp2004, author = {Liu, Liang and Soibelman, Lucio and Trupp, Torsten}, title = {Novel Technologies for Construction Field Data Collection}, doi = {10.25643/bauhaus-universitaet.112}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1120}, year = {2004}, abstract = {A vast growth of advanced information technology systems and tools nowadays is opening new ways to collect accurate as-built data. Since the turn of the millennium, new technology developments enable for the first time to gather accurate as-built information. Accurate as-built data will be of great usage to construction management as well as to designers and engineers. Given that most of the planned data are already digitally available, as-built data remains on paper forms. Information technology developments are opening new ways to digitize construction field data in order to develop intelligent tools for construction management allowing design engineers to update as-planned data. 3D Laser scanning, digital close-range photogrammetry and mobile computing are among the promising data collection technologies, which are auspicious to create new opportunities to develop advanced construction management and engineering tools. Primarily, accurate collected as-built data will be highly beneficial for the process of updating as-planned data.}, subject = {Mobile Computing}, language = {en} } @inproceedings{vanRooyenOlivier2004, author = {van Rooyen, G.C. and Olivier, A. H.}, title = {Notes on structural analysis in a distributed collaboratory}, doi = {10.25643/bauhaus-universitaet.145}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1451}, year = {2004}, abstract = {The worldwide growth of communication networks and associated technologies provide the basic infrastructure for new ways of executing the engineering process. Collaboration amongst team members seperated in time and location is of particular importance. Two broad themes can be recognized in research pertaining to distributed collaboration. One theme focusses on the technical and technological aspects of distributed work, while the other emphasises human aspects thereof. The case of finite element structural analysis in a distributed collaboratory is examined in this paper. An approach is taken which has its roots in human aspects of the structural analysis task. Based on experience of how structural engineers currently approach and execute this task while utilising standard software designed for use on local workstations only, criteria are stated for a software architechture that could support collaborative structural analysis. Aspects of a pilot application and the results of qualitative performance measurements are discussed.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{PetzoldBartelsDonath2004, author = {Petzold, Frank and Bartels, Heiko and Donath, Dirk}, title = {New techniques in Building Surveying}, doi = {10.25643/bauhaus-universitaet.180}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1803}, year = {2004}, abstract = {Building activities in the construction industry in Germany increasingly concentrate on building measures in or involving the existing built environment. Before planning can begin, buildings must be surveyed in whole or in part with the surveying of geometric data playing a dominant role. The geometric survey is typically undertaken using geodetic or photogrammetric measuring techniques and equipment that have been adapted for use in building surveying. Accordingly appropriate technical knowledge is required in order to be able to operate them as well as a considerable financial investment. Such equipment and surveying methods are usually adaptations from other disciplines. The paper discusses and presents approaches to developing "new" equipment for building surveying, devised with the needs of building surveying in mind - redesigns or new designs for surveying tools. The designs are the result of an inter-disciplinary project between the Faculty of Architecture and the Faculty of Product Design at the Bauhaus Universit{\"a}t Weimar.}, subject = {Architektur}, language = {en} } @inproceedings{BrennigSanio2004, author = {Brennig, Thomas and Sanio, Hans-Peter}, title = {New Methods of Computer Aided Optimization of Investment and Operating Costs for Buildings During Their Useful Life}, doi = {10.25643/bauhaus-universitaet.96}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-965}, year = {2004}, abstract = {Current software solutions for real estate planning, construction and use, do not model the complete life cycle of a building. Well-integrated software tools exist for the planning and construction phases. Data integrity exists throughout the planning and construction phases, but problems occur at the transition to the use-phase. At this interface, the complete data set of planning and execution gets lost. Another software deficiency is that current software solutions don't handle construction work and maintenance work equally. This is why a new software generation is demanded, which continuously covers the entire workflow process from the planning phase to the demolition of a building. New data concepts have to be developed, which allow bringing work items for construction together with work items for real estate use.}, subject = {Optimierung}, language = {en} } @inproceedings{MeissnerRueppelTheiss2004, author = {Meißner, Udo F. and Rueppel, Uwe and Theiss, Mirko}, title = {Network-Based Fire Engineering Supported by Agents}, doi = {10.25643/bauhaus-universitaet.144}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1447}, year = {2004}, abstract = {Building design in Civil Engineering is characterized by the cooperation of experts in multiple disciplines. Close cooperation of engineers in different fields is the basis of high product quality, short development periods and a minimum of investment costs. For each building the engineers have to create a new fire engineering model. The consistent realization of the fire engineering model in all details has high demands on communication, collaboration and building models. Thereby, to preserve the related design models consistent to each other and compatible with the rules of fire engineering is a complex task. In addition, regulations and guidelines vary according to the building location, so the knowledge base must be integrated dynamically into the planning process. This contribution covers the integration of engineers and design models into a cooperation network on the basis of mobile agents. The distributed models of architectural design, structural planning and fire engineering are supported. These models are implemented as XML-based models which can be accessed by mobile agents for information retrieval and for processing tasks. Agents are provided to all planners, they are enabled to check up the distributed design models with the knowledge base of the fire protection regulations,. With the use of such an agent each planner is supported to check up his planning for accordance with the fire protection requirements. The fire-engineering-agent analyzes the design and detects inconsistencies by processing fire protection requirements and design model facts in a rule-based expert system. The possibility to check the planning information at an early state in the sense of compatibility to the fire protection regulations enables a comprehensive diagnosis of the design and the reduction of planning errors.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{SchleyMejstrikHolz2004, author = {Schley, Frank and Mejstrik, Marcus and Holz, K.-Peter}, title = {Network Based Co-operation Platform for Geotechnical Engineering}, doi = {10.25643/bauhaus-universitaet.143}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1431}, year = {2004}, abstract = {This paper describes an approach to support co-operation of experts in heterogeneous geotechnical engineering project environments during both regular execution and handling of exceptional situations. A co-operation platform is introduced which is based on a generalized information model mapping key information about the construction project, the construction process as well as the organization structure. Several tools are provided to operate the information model in a network based environment.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{EslimyIsfahanyPegels2004, author = {Eslimy-Isfahany, S. H. R. and Pegels, Georg}, title = {Net-distributed Co-operation Including Developing Countries, Practical Case Study - Iran}, doi = {10.25643/bauhaus-universitaet.142}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1421}, year = {2004}, abstract = {The scientific transfer of key technology features to developing countries, together with adequate competence, localisation and adaptation, is the primary purpose of the proposed investigation. It is evident that introducing high-level CAD design and detailing will improve the planning process in developing countries. Successful utilization of applied information technology for the planning process, however, depends on the user-interface of individual software. Therefore, to open the great opportunity embedded in CAD software for clients globally, the language and character-set barrier of traditional user-interfaces must be overcome. A proposal for a research program is given here to address such issue in favour of global civil engineering.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{GebbekenPfeifferVidekhina2004, author = {Gebbeken, Norbert and Pfeiffer, Eberhard and Videkhina, Inna}, title = {Modules for the education of civil engineers and the management of expert knowledge}, doi = {10.25643/bauhaus-universitaet.91}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-918}, year = {2004}, abstract = {In the focus of the Bologna-contract of the European secretaries of education the universities are invited to aim a unification and comparability of certificates and to offer compatible and cooperative models of education. Among existing lectures in the Internet there will arise a new competition between the universities in netbased teaching and learning environments. For the use of distributed sources of information and for the possibility to generate free configurable sequences of education modules you need management systems which are able to handle different formats of documents and to assemble it to consistent and valid lessons. Beside elementar viewing-functions, fusion of information also administrative tasks are needed, e.g. automated efficiency controls, adaptive learning surroundings. This paper attends to three aspects: - netbased teaching and learning in the area of the instruction of civil engineers - netbased information assembling and fusion of knowledge bases to higher level documents - netbased learning with international coordinated projects}, subject = {Bautechnik}, language = {en} } @article{Rose2004, author = {Rose, Martin}, title = {Modeling of Freeway Traffic}, doi = {10.25643/bauhaus-universitaet.263}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2639}, year = {2004}, abstract = {An integrated modeling of freeway traffic is developed, whose implementation in an uniform computer -aided simulation model facilitate comparative evaluation and systematic coupling of several traffic simulations, traffic controls, traffic measurements and traffic scenarios. The integrated modeling of freeway traffic is a basic mapping of freeway networks, control methods, measurements and different simulations of traffic flow...}, subject = {Verkehrsplanung}, language = {en} } @inproceedings{RenShiXu2004, author = {Ren, Aizhu and Shi, Jianyong and Xu, Yun}, title = {Modeling of Buildings and Roads for Urban Applications based on 2D Digital Maps}, doi = {10.25643/bauhaus-universitaet.179}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1791}, year = {2004}, abstract = {Three-dimensional models of urban objects play an important role in the urban applications such as urban planning, environmental concerning, or urban disaster mitigations. While the modeling of urban objects is time consuming and storage costing. This paper presents solutions for this. Buildings with regular shapes and plane roofs are constructed into computer models by identifying of graphic elements from the digital maps of urban area to get building base plane and building heights. Buildings with irregular shapes and non-plane roofs are constructed into computer models by employment of a specific system developed by the authors. Road objects and topologies are constructed into computer models by employment of specific algorithms. The solutions presented in this paper has been used in the development of urban disaster mitigation system for Shantou, China.}, subject = {Architektur}, language = {en} } @inproceedings{SwaddiwudhipongThoLiu2004, author = {Swaddiwudhipong, Somsak and Tho, Kee Kiat and Liu, Zishun}, title = {Material characterization using artificial neural network}, doi = {10.25643/bauhaus-universitaet.155}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1550}, year = {2004}, abstract = {Indentation experiments have been carried out over the past century to determine hardness of materials. Modern indentation machines have the capability to continuously monitor load and displacement to high precision and accuracy. In recent years, research interests have focussed on methods to extract material properties from indentation load-displacement curves. Analytical methods to interpret the indentation load-displacement curves are difficult to formulate due to material and geometric nonlinearities as well as complex contact interactions. In the present study, an artificial neural network model was constructed for interpretation of indentation load-displacement curves. Large strain-large deformation finite element analyses were first carried out to simulate indentation experiments. The data from finite element analyses were then used to train the artificial neural network model. The artificial neural network model was able to accurately determine the material properties when presented with load-displacement curves which were not used in the training process. The proposed artificial neural network model is robust and directly relates the characteristics of the indentation loaddisplacement curve to the elasto-plastic material properties.}, subject = {Neuronales Netz}, language = {en} } @inproceedings{MilesCenTaylor2004, author = {Miles, John and Cen, Mei and Taylor, Mark}, title = {Linking Sketching and Constraint Checking for Early Conceptual Design}, doi = {10.25643/bauhaus-universitaet.1548}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1547}, year = {2004}, abstract = {At the start of the conceptual design process, designers start to give tangible form to their thoughts by sketching. This helps with reasoning and communicates ideas to other members of the team. Sketches are gradually worked up into more formal drawings which are then passed to the other stages of the design process. There are however some problems with basing early ideas on sketching. For example, due to their ad-hoc nature, sketches tend only to be diagrammatic representations and so designers cannot be sure that their ideas are feasible and what is being proposed meets the constraints described in the client brief. This can result in designers wasting time working up ideas which prove to be unsuitable. Also the process of constraint checking is complex and time consuming and so designers tend limit their search of possible options and instead choose satisfying rather than good solutions. This paper describes the INTEGRA project which examines the role of sketching in early conceptual design and how this can be linked to other aspects of the process and particularly automated constraint checking using an IT based approach. The focus for the work is the design of framed buildings. A multi-disciplinary approach has been adopted and the work has been undertaken in close collaboration with practising designers and clients.}, subject = {Konzipieren }, language = {en} } @article{GalffyWellmannJelicHartmann2004, author = {Galffy, Mozes and Wellmann Jelic, Andres and Hartmann, Dietrich}, title = {Lifetime-oriented modelling of vortex-induced across-wind vibrations on bridge tie rods}, doi = {10.25643/bauhaus-universitaet.253}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2536}, year = {2004}, abstract = {The influence of vortex-induces vibrations on vertical tie rods has been proved as a determinant load factor in the lifetime-oriented dimensioning of arched steel bridges. Particularly, the welded connection plates between the suspenders and the arches often exhibit cracks induced primarily rods. In this context, the synchronization of the vortex-shedding to the rod motion in a critical wind velocity range, the so-called lock-in effect, is of essential interest.}, subject = {Finite-Elemente-Methode}, language = {en} } @inproceedings{ZwoelferThomasSchinketal.2004, author = {Zw{\"o}lfer, Michael and Thomas, Peter and Schink, Claus-J{\"u}rgen and Koch, Volker}, title = {Life cycle optimized system solutions for densified housing with massive wood technology}, doi = {10.25643/bauhaus-universitaet.98}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-980}, year = {2004}, abstract = {The objective of the joint project 'Life cycle optimised system solutions for densified housing with massive wood technology', short form Basys, was the development and application of an open building system for sustainable construction in a virtual enterprise. Four partners coming from building economy and a university institute developed the building system in a comprehensive planning process. By applying massive wood technology, most requirements of densified housing can be met and individual buildings can be produced on demand.}, subject = {Lebenszyklus }, language = {en} } @inproceedings{ScheerGama2004, author = {Scheer, Sergio and Gama, Carmen L{\´u}cia G.}, title = {Learning objects for a teaching and learning network in structural engineering : Developing learning objects for a structural engineering educational network}, doi = {10.25643/bauhaus-universitaet.85}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-856}, year = {2004}, abstract = {Information and Communication Technologies (ITC) in education have been extensively discussed nowadays. In this e-learning scenario, the construction and use of environments that support teaching and learning is a reality. Therefore, for time and general resource savings it is crucial the access to hypermedia contents with great interactivity and with high reusability. Substantial efforts have been centered in the search for a metadata proposal (metadata is a generic term used to describe data that can be used to identify and to describe common characteristics among different documents) that can be standardized and is system independent for the so called learning objects.}, subject = {Bautechnik}, language = {en} } @article{PalaneeswaranKumaraswamyNg2004, author = {Palaneeswaran, Ekambaram and Kumaraswamy, Mohan and Ng, Thomas}, title = {Knowledge Management for Small and Medium Contractors}, doi = {10.25643/bauhaus-universitaet.258}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2582}, year = {2004}, abstract = {Effective knowledge management is increasingly considered as a cornerstone of sustainable business success. Knowledge management systems are strategically valuable for both ensuring consistency and continuous improvement of various aspects such as quality delivery, productivity and competitiveness. The small and medium enterprises (SMEs) in the construction industry are mostly operating under tighter timeframes, narrower profit margins and more constrained resources. Hence the recently commenced SMILE-SMC (Strategic Management with Information Leveraged Excellece for Small and Medium Contractors) project aims to support the information and knowledge management needs of the small and medium contractors in Hong Kong. This paper presents some snapshots on the SMILE-SMC project, and its conceptualized deliverables with some highlights of recent developments.}, subject = {Wissensmanagement}, language = {en} } @article{SchnellenbachHeldHartmann2004, author = {Schnellenbach-Held, Martina and Hartmann, Markus}, title = {Knowledge Based Systems in Distributed Desgin Environments}, doi = {10.25643/bauhaus-universitaet.210}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2106}, year = {2004}, abstract = {Today's building industry not only demands more and more reduced construction time on building site, but also an advanced and mostly construction attendant design phase. Even though there is software available to support design processes in distributed environments, most applications only support simple document based exchange of information. In this paper a knowledge based system is presented to support cooperative, comprehensive design processes in distributed environments. The presented research project is financially supported by the German Research Community (DFG - Deutsche Forschungsgemeinschaft).}, subject = {Produktmodell}, 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{PengLawLau2004, author = {Peng, Jun and Law, Kincho and Lau, Gloria}, title = {Internet-Enabled Software Model for Nonlinear Structural Analysis and Simulations}, doi = {10.25643/bauhaus-universitaet.105}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1057}, year = {2004}, abstract = {This paper describes an Internet-enabled software model that could facilitate the development and utilization of nonlinear structural analysis programs. The software model allows users easy access to the analysis core program and the analysis results by using a web-browser or other application programs. In addition, new and legacy codes can be incorporated as distributed services and be integrated with the software framework from disparate sites. A distributed project management system, taking advantages of Internet and database technologies, is implemented to store and manage model information and simulation results. Nonlinear dynamic analysis and simulations of a bridge structure is performed to illustrate the facilities of the Internet-enabled software model.}, subject = {Konzipieren }, 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{SchinkKoch2004, author = {Schink, Claus-J{\"u}rgen and Koch, Volker}, title = {Interdisciplinary Cooperation Modules in Mobile Networks}, doi = {10.25643/bauhaus-universitaet.178}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1788}, year = {2004}, abstract = {The contribution describes the didactical integration of wireless access networks for the campus of the University of Karlsruhe in the education of architects and engineers. It focuses on the development of an interdisciplinary communication network to encourage and promote the communication and collaboration between students. The project assumes that significant learning progresses in net-based learning scenarios are based upon the synchronous and asynchronous cooperation between the students themselves. The remote cooperation across borders of disciplines makes high demands on capacity in communicating and cooperating of the involved persons as well as on the supporting tools. Therefore, the collective acquisition of knowledge and cooperation has to be trained intensively during the studies. Based on the design and project oriented cooperation platform netzentwurf.de the authors developed the tools "Jobadmin" to administrate multidisciplinary workgroups, the "Swarm Knowledge Catalogue" to collect and store knowledge and "LivingCampus", an instrument providing basic services for dynamic communication.}, subject = {Architektur}, language = {en} } @article{KraftWilhelms2004, author = {Kraft, Bodo and Wilhelms, Nils}, title = {Interactive Distributed Knowledge Support for Conceptual Building Design}, doi = {10.25643/bauhaus-universitaet.209}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2094}, year = {2004}, abstract = {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 design. 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 industrial CAD tool ArchiCAD. Consistency between knowledge and conceptual design is ensured by the constraint checker, another extension to ArchiCAD.}, subject = {Produktmodell}, 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} } @article{WillenbacherHuebler2004, author = {Willenbacher, Heiko and H{\"u}bler, Reinhard}, title = {Intelligent Link-Management for the Support of Integration in Building Life Cycle}, doi = {10.25643/bauhaus-universitaet.222}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2223}, year = {2004}, abstract = {The processes in the life cycle of buildings are characterised by highly distinct teamwork. The integration of all the distributed working participants, by providing an environment, which especially supports the communication and collaboration between the actors, is a fundamental step to improve the efficiency of the involved processes and to reduce the total costs. In this article, a link based modelling approach and its "intelligent" link management is introduced (1). This approach realises an integration environment based on a special building model that acts as a decision support system. The link-based modelling is characterised by the definition and specialisation of links between partial models. These intelligent managed links enable a very flexible and task specific data access and exchange between all the different views and partial models of the participants.}, subject = {Mehragentensystem}, language = {en} } @inproceedings{HartmannMeissnerRueppel2004, author = {Hartmann, Dietrich and Meißner, Udo F. and Rueppel, Uwe}, title = {Integration of Productmodel Databases into Multi-Agent Systems}, doi = {10.25643/bauhaus-universitaet.141}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1410}, year = {2004}, abstract = {This paper deals with two different agent-based approaches aimed at the incorporation of complex design information into multi-agent planning systems. The first system facilitates collaborative structural design processes, the second one supports fire engineering in buildings. Both approaches are part of two different research projects that belong to the DFG1 priority program 1103 entitled "Network-based Co-operative Planning Processes in Structural Engineering" (DFG 2000). The two approaches provide similar database wrapper agents to integrate relevant design information into two multi-agent systems: Database wrapper agents make the relevant product model data usable for further agents in the multi-agent system, independent on their physical location. Thus, database wrapper agents act as an interface between multi-agent system and heterogeneous database systems. The communication between the database wrapper agents and other requesting agents presumes a common vocabulary: a specific database ontology that maps database related message contents into database objects. Hereby, the software-wrapping technology enables the various design experts to plug in existing database systems and data resources into a specific multi-agent system easily. As a consequence, dynamic changes in the design information of large collaborative engineering projects are adequately supported. The flexible architecture of the database wrapper agent concept is demonstrated by the integration of an XML and a relational database system.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{HauschildBorrmannHuebler2004, author = {Hauschild, Thomas and Borrmann, Andr{\´e} and H{\"u}bler, Reinhard}, title = {Integration of Constraints into Digital Building Models for Cooperative Planning Processes}, doi = {10.25643/bauhaus-universitaet.177}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1775}, year = {2004}, abstract = {The uniqueness and the long life cycle of buildings imply a dynamically modifiable building model. The technological foundation for the management of digital building models, a dynamic model management system (MMS), developed by our research group, allows to explicitly access and to modify the object model of the stored planning data. In this paper, the integration of constraints in digital building models will be shown. Constraints are conditions, which apply to the instances of domain model classes, and are defined by the user at runtime of the information system. For the expression of constraints, the Constraint Modelling Language (CML) has been developed and will be described in this paper. CML is a powerful, intuitively usable object-oriented language, which allows the expression of constraints at a high semantic level. A constrained-enabled MMS can verify, whether an instance fulfils the applying constraints. To ensure flexibility, the evaluation of constraints is not implicitly performed by the systems, but explicitly initiated by the user. A classification of constraint types and example usage scenarios are given.}, subject = {Architektur}, language = {en} } @inproceedings{PetersenDiaz2004, author = {Petersen, Michael and Diaz, Joaquin}, title = {Integrated planning of buildings based on computer models in project communication systems}, doi = {10.25643/bauhaus-universitaet.176}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1762}, year = {2004}, abstract = {The increasing demands in building and civil engineering - with regard to the growing amount of legal requirements and the needs of a flexible usage of the building - requires an optimisation of all processes during the planning and construction phases. This aim can be only reached by transferring of innovative information and communication technologies in the field of cooperation of all partners in a building project. In this article the enhancement of the existing planning processes based on an improved information management is introduced. Since the late 90ies the availability of hardware and software infrastructures for a networkbased cooperation, e.g. email, in small and middle-sized companies increased the problems of an unstructured communication in the planning and construction processes. These problems have not been solved by the usage of the upcoming project communication systems either, which are often used as a simple medium for data transfer. Because of the easy way of distributing documents to all planning partners a huge amount of files and subsequent versions can be stored so that the planners often have to scope with an information overflow. The underlying hierarchical structures based on simple files stored in tree views are not sufficient for an adequate representation of the different specific views of the planners and the management of relationships between the three information domains building structure, costs and time schedules. ..}, subject = {Architektur}, language = {en} } @article{NeubergFankEkkerlein2004, author = {Neuberg, Frank and Fank, Ernst and Ekkerlein, Christian}, title = {Integrated Life Cycle Simulation and Assessment of Buildings}, doi = {10.25643/bauhaus-universitaet.235}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2351}, year = {2004}, abstract = {Buildings require both for construction and, due to their comparatively long life cycle for maintenance, significant raw material and energy resources. So far available knowledge about resource consumption during an entire life cycle of a building is still quite rare, because various criteria affect each other and/or overlay mutually. In this contribution a model based software concept is presented using an integrated approach for life cycle simulation and assessment of buildings. The essential point of the development consists of connecting an IFC compliant product model of a building via the Internet with data bases for the resource and energy requirement of building materials. Furthermore, numerical simulations allow calculating and minimizing the energy consumption, the resource requirement, the waste streams and also the noxious emissions. In the context of this paper we present the first release of software programs for architects and engineers, which help them to evaluate their design decisions objectively in early planning steps. Additionally the usage of the software is demonstrated by a test case study for a real world building. By applying this software in practice a substantial contribution for saving energy and natural resources can be provided in the sense of sustainable and ecological building design.}, subject = {Produktmodell}, language = {en} } @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{JianMingKe2004, author = {Jian Ming, Lu and Ke, Chen}, title = {Information technology used in highway and bridge engineering}, doi = {10.25643/bauhaus-universitaet.111}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1114}, year = {2004}, abstract = {With the speedy development of transportation of China, especially construction of many high-grade highways, some information technology successes have been achieved in the highway and bridge engineering, such as survey, design, construction and maintenance etc. In this paper, some applications about information technology in the highway engineering were introduced and some bridge professional software developed by RIOH (Research Institute Of Highways) in recent years was also introduced.}, subject = {Mobile Computing}, language = {en} } @inproceedings{Rodriguez2004, author = {Rodriguez, Adhamina}, title = {Information Exchange in The Construction Industry : The Particular Case of Green Buildings}, doi = {10.25643/bauhaus-universitaet.175}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1757}, year = {2004}, abstract = {Construction is a conservative industry that over the last twenty ye ars has experienced drastic changes in the way that interdisciplinary teams interact to design and execute a project. In this article we offer a general overview of how the main participants cooperate in the different phases of a construction project, and which are some of the main areas for communication improvement. We also explore the communication tools used in the exchange of information, and identify the main causes of information breakdown. The general framework of this study is of application to both standard and green projects. At the end of the article we discuss the peculiarities of green buildings. Our goal is to offer a series of industry insights derived from the perspective of a general contractor aimed at identifying the areas where contributions in computing and information exchange could have a greater impact on the successful completion of a project.}, subject = {Architektur}, language = {en} } @inproceedings{GebbekenBaumhauerIonita2004, author = {Gebbeken, Norbert and Baumhauer, Andreas and Ionita, Mihai}, title = {Increasing the Reliability and Performance through Automatization and Parallel Working}, doi = {10.25643/bauhaus-universitaet.139}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1397}, year = {2004}, abstract = {Re-examination of the behaviour of structures can be necessary due to deterioration or changes in the traffic situation during their lifetime. The Finite Element Method (FEM) is widely used in order to accomplish numerical analysis. Considering the development of computer performance, more detailed FEM models can be analyzed, even on site, with mobile computers. To compensate the increasing amount of data needed for the model input, measures need to be taken to save time, by distributing the work. In order to provide consistency to the model, fedback data must be checked upon reception. A local wireless computer network of ultra-portable devices linked together with a computer can provide the coordination necessary for efficient parallel working. Based on a digital model consisting of all data gathered, structural modelling and numerical analysis are performed automatically. Thus, the user is released from the work that can be automatized and the time needed for the overall analysis of a structure is decreased.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{KongLiAnumbaetal.2004, author = {Kong, Stephen and Li, Heng and Anumba, Chimay and Chen, Zhen}, title = {Implementation of Web Services to Enable Interoperability of Webbased Construction Products Catalogue}, doi = {10.25643/bauhaus-universitaet.100}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1005}, year = {2004}, abstract = {This paper introduces the current development of electronic catalogues of construction products. The common system architecture of Web-based electronic products catalogues are discussed, followed by a discussion on construction products information standardization and latest distributed-systems technologies for communicating construction products information. Finally, this paper presents an implementation of Web service in e-commerce systems to enable sharing of construction products information.}, subject = {Elektronischer Produktkatalog}, language = {de} } @article{GeibigSchnellenbachHeld2004, author = {Geibig, Oliver and Schnellenbach-Held, Martina}, title = {Implementation of an Agent-based Bidding Consortium in the Architecture of an Agent-based Virtual Marketplace}, doi = {10.25643/bauhaus-universitaet.221}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2214}, year = {2004}, abstract = {In this research project we intend to transfer the whole AEC-Bidding process to an agent-based virtual marketplace. Hereby, the existing legal regulations have to be considered. Important aspects in developing the virtual marketplace are to provide the possibility to realize an agentbased bidding consortium as well as to integrate subcontractors.}, subject = {Mehragentensystem}, language = {en} } @inproceedings{WilsonDamodaranOlphert2004, author = {Wilson, Ian E. and Damodaran, Leela and Olphert, Wendy}, title = {ICT Adoption in the Construction Sector: Education and Training Issues}, doi = {10.25643/bauhaus-universitaet.201}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2013}, year = {2004}, abstract = {Organisational and human issues have been highlighted, among other issues (ICT infrastructures, legal and contractual, etc.), as key elements in enhancing the competitiveness of the construction sector. More specifically, the importance of human resources has been recognised, especially training and professional development, in order to cultivate a stable workforce. The paper provides a review of the key training needs for the construction sector with particular reference to the uptake and exploitation of new technologies and working practices, presents an action plan to address learning and training needs, and proposes an eight-stage iterative learning and training methodology. The results will be of particular interest to managers in stakeholder organisations of all sizes throughout the sector, plus academic and research bodies intending to continue construction ICT research.}, subject = {Forschung}, language = {en} } @inproceedings{HaapalainenNaaranojaLonka2004, author = {Haapalainen, P{\"a}ivi and Naaranoja, Marja and Lonka, Heikki}, title = {How to Prevent Project Knowledge Management Failures in Construction - IT Enabled Communication Perspective}, doi = {10.25643/bauhaus-universitaet.1970}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1977}, year = {2004}, abstract = {This article discusses how the failures of construction projects could be prevented. The focus is on using IT tools in communication. The article is based on the findings of the PROLABproject. The project seeks to find solutions for how the information can effectively be used in project management, specially in construction projects, what kind of procedures help the management of the knowledge and how the obstacles for efficient ways of administrating the information can be removed. These obstacles can be either related to use of new technology or to organization culture. The paper discusses e-mail as a medium of communication with the media richness framework (Fulk \& Boyd 1991) based on the interviews done with the participants of construction projects. We found out that the emails were used in both rich way and not so rich way. Obstacles of rich use of IT communication were partly technical and partly psychological. Technology acceptance model (TAM) is used to study the actual use of emails in communication. Obstacles of the use of emails were mostly individual differences like the skills to use the system or external variables like they did not have proper software to open the attachments. Also people talked about information overload. Emails often push too much information. Keywords: IT tools, Communication, Knowledge management, Construction}, subject = {Hochschulbildung}, language = {en} } @article{Makanae2004, author = {Makanae, Koji}, title = {Highway Sequence Editor based on the Length-based Highway Product Model}, doi = {10.25643/bauhaus-universitaet.234}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2347}, year = {2004}, abstract = {The highway product model based on the length information of the centerline, and the application system is developed. This paper shows the schema and the modeling process of the product model, which includes geometric elements such as an alignment, lanes, sidewalks, shoulders and sprits, and accessories such as guard fences, plantings and signs. Furthermore, The Highway Sequence Editor (HSE) is developed as an application system to verify the model.}, subject = {Produktmodell}, 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} } @article{WeiseKatranuschkovScherer2004, author = {Weise, Matthias and Katranuschkov, Peter and Scherer, Raimar J.}, title = {Generic Services for the Support of Evolving Building Model Data}, doi = {10.25643/bauhaus-universitaet.207}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2077}, year = {2004}, abstract = {Many problems related to data integration in AEC can be better tackled by an approach that takes into account the heterogeneity of tasks, models and applications but does not require continuous consistency of the evolving design data, at each data management operation. Such an approach must incorporate adequate services that can facilitate reintegration of concurrently modified data at reasonably selected coordination points. In this paper we present a set of methods which, used in combination, can achieve that goal. After a description of the principal envisaged cooperative work scenario each of these methods is discussed in detail and current observations drawn from their software realisation are given. Whilst the suggested approach is valid for any EXPRESS-based data model, the practical focus of work has been on facilitating IFC-driven integration.}, subject = {Produktmodell}, language = {en} } @inproceedings{AsayamaMae2004, author = {Asayama, Shuichi and Mae, Toshifumi}, title = {Fractal Truss Structure and Automatic Form Generation Using Iterated Function System}, doi = {10.25643/bauhaus-universitaet.104}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1046}, year = {2004}, abstract = {This paper describes a couple of new truss structures based on fractal geometry. One is the famous Sierpinski Gasket and another is a fractal triangle derived by means of applying a process forming leaves of a cedar tree using M. F. Barnsley's contraction mapping theory. Therefore a pair of x-y coordinates of an arbitrary nodal point on the structures are generated easily if IFS(Iterated Function System) codes and a scale of them are specified. Structural members are defined similarly. Thus data for frame analysis can be generated automatically, which is significant if the objective structure has complex configuration. Next analytical results under vertical and wind loadings in Japanese Building Code are shown. Here members are assumed to be timber and to have cross section of 15cm×15cm. Finally authors conclude that geometrically new truss structures were developed and automatic data generation for frame analysis was attained using IFS. Analytical results show they contribute to saving material when compared it with King-post truss.}, subject = {Konzipieren }, language = {en} } @article{MilbradtSchierbaumSchwoeppe2004, author = {Milbradt, Peter and Schierbaum, Jochen and Schw{\"o}ppe, Axel}, title = {Finite Cell-Elements of Higher Order}, doi = {10.25643/bauhaus-universitaet.252}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2524}, year = {2004}, abstract = {The method of the finite elements is an adaptable numerical procedure for interpolation as well as for the numerical approximation of solutions of partial differential equations. The basis of these procedure is the formulation of suitable finite elements and element decompositions of the solution space. Classical finite elements are based on triangles or quadrangles in the two-dimensional space and tetrahedron or hexahedron in the threedimensional space. The use of arbitrary-dimensional convex and non-convex polyhedrons as the geometrical basis of finite elements increases the flexibility of generating finite element decompositions substantially and is sometimes the only way to get a clear decomposition...}, subject = {Finite-Elemente-Methode}, language = {en} } @article{StaubFrench2004, author = {Staub-French, Sheryl}, title = {Feature-based Product Modeling for Building Construction}, doi = {10.25643/bauhaus-universitaet.233}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2331}, year = {2004}, abstract = {Current building product models explicitly represent components, attributes of components, and relationships between components. These designer-focused product models, however, do not represent many of the design conditions that are important for construction, such as component similarity, uniformity, and penetrations. Current design and construction tools offer limited support for detecting these construction-specific design conditions. This paper describes the ontology we developed using the manufacturing concept of features to represent the design conditions that are important for construction. The feature ontology provides the blueprint for the additions and changes needed to transform a standard product model into a constructionspecific product model. The ontology formalizes three classes of features, defines the attributes and functions of each feature type, and represents the relationships between features explicitly. The descriptive semantics of the ontology allows practitioners to represent their varied preferences for naming features, specifying features that result from component intersections and the similarity of components, and grouping features that affect a specific construction domain. A software prototype that implements the ontology enables practitioners to transform designer-focused product models into feature-based product models that represent the construction perspective.}, subject = {Produktmodell}, language = {en} } @inproceedings{ChenKongLietal.2004, author = {Chen, Zhen and Kong, Stephen and Li, Heng and Xu, Qian}, title = {Evaluating IT Applications for Innovative Construction Management}, doi = {10.25643/bauhaus-universitaet.99}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-994}, year = {2004}, abstract = {The construction management has been under pressure to reduce operating costs and to improve productivity using innovative information technologe (IT) solutions conformed to structural characteristics, site conditions and past experiences. Given the growing emphasis on effectiveness and efficiency in construction projects, there is an imminent need to develop a formal procedure to select the best IT application for each proposed construction project and research and development (R\&D) project. As there are numerous factors that have to be considered in selecting appropriate IT in a given situation, decision-makers need to have multicriteria decision-making ability. To enable them to make the most appropriate decision in any situation, it is important that effective tools incorporating multicriteria decision-making techniques are available. In this paper, an Analytic Network Process (ANP) model is conducted for the selection of appropriate IT application for innovative construction management prior to construction or research. The paper concludes that the ANP is a viable and capable tool for conducting IT application selection in multicriteria decision-making environment.}, subject = {Bauf{\"u}hrung}, language = {en} } @inproceedings{PetersenSeewald2004, author = {Petersen, Michael and Seewald, Gerrit}, title = {Establishing of fundamentals in building projects using web services}, doi = {10.25643/bauhaus-universitaet.127}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1273}, year = {2004}, abstract = {During the establishing of fundamentals in a building project a huge amount of influence factors and boundary conditions have to be investigated in order to provide the prerequisites for further planning processes. These investigative tasks are often related with a great effort concerning time and money, because there are no standardized workflows and interfaces which provide an efficient access to the necessary information related to a specific construction site. Within the fundamental investigation human and natural circumstances have to be taken into account. Thus, in this project two examples have been chosen in order to demonstrate the holistic approach for an integration and provision of georeferenced information. The developed internet-site http://www.grundlagenermittlung.de has been designed to support architects and civil engineers in early planning phases of a building project efficiently. It offers web-based services based on dynamic interfaces for a flexible search and collection of information concerning the building site. Therefore, a central Metadatabase-Server for Description, Discovery and Integration has been established which enables a registration of georeferenced services and the redirection of incoming requests to other, distributed data pools. Using this Yellow-Page concept in combination with the underlying meta-data based on the ISO 19115 standard an efficient investigation of geographical and environmental information becomes possible.}, subject = {Bauwerk}, language = {en} } @article{Abdalla2004, author = {Abdalla, Jamal}, title = {Elements of an Agent-based Mediative Communication Protocol for Design Objects}, doi = {10.25643/bauhaus-universitaet.220}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2207}, year = {2004}, abstract = {Integrated structural engineering system usually consists of large number of design objects that may be distributed across different platforms. These design objects need to communicate data and information among each other. For efficient communication among design objects a common communication protocol need to be defined. This paper presents the elements of a communication protocol that uses a mediator agent to facilitate communication among design objects. This protocol is termed the Mediative Communication Protocol (MCP). The protocol uses certain design communication performatives and the semantics of an Agent Communication language (ACL) mainly the Knowledge and Query Manipulation Language (KQML) to implement its steps. Details of a Mediator Agent, that will facilitate the communication among design objects, is presented. The Unified Modeling Language (UML) is used to present the Meditative protocol and show how the mediator agent can be use to execute the steps of the meditative communication protocol. An example from structural engineering application is presented to demonstrate and validate the protocol. It is concluded that the meditative protocol is a viable protocol to facilitate object-to-object communication and also has potential to facilitate communication among the different project participants at the higher level of integrated structural engineering systems.}, subject = {Mehragentensystem}, language = {en} }