@inproceedings{O'BrienDansoAmoakoIssa2004, author = {O'Brien, William and Danso-Amoako, Mark and Issa, Raja}, title = {A Case Study of IFC and CIS/2 Support for Steel Supply Chain Processes}, doi = {10.25643/bauhaus-universitaet.119}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1195}, year = {2004}, abstract = {The evolution of data exchange and integration standards within the Architectural, Engineering and Construction industry is gradually making the long-held vision of computer-integratedconstruction a reality. The Industry Foundations Classes and CIMSteel Integration Standards are two such standards that have seen remarkable successes over the past few years. Despite successes, these standards support the exchange of product data more than they do process data, especially those processes that are loosely coupled with product models. This paper reports on on-going research to evaluate the adequacy of the IFC and CIS/2 standards to support process modeling in the steel supply chain. Some initial recommendations are made regarding enhancements to the data standards to better support processes.}, subject = {Bauwerk}, language = {en} } @inproceedings{TsutsumiHashimoto2004, author = {Tsutsumi, Kazutoshi and Hashimoto, Hiromi}, title = {A Development of the Building Kansei Information Retrieval System}, doi = {10.25643/bauhaus-universitaet.188}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1884}, year = {2004}, abstract = {The purpose of this research is to develop the method to retrieve a building name from the impression of the building. First, the images of the building are registered as database by the questionnaire. Next, the images of the objective building are compared with the degree of matching in image databases, and the building with high synthetic matching degree is retrieved. This system could get a good retrieval result. Moreover, image processing was done, and image databases are trained by neural network from the amount of characteristics of the image, and the retrieval system by image processing was examined.}, subject = {Mehragentensystem}, 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{SchapkeScherer2004, author = {Schapke, Sven-Eric and Scherer, Raimar J.}, title = {A Four Layer Bayesian Network for Product Model Based Information Mining}, doi = {10.25643/bauhaus-universitaet.120}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1207}, year = {2004}, abstract = {Business and engineering knowledge in AEC/FM is captured mainly implicitly in project and corporate document repositories. Even with the increasing integration of model-based systems with project information spaces, a large percentage of the information exchange will further on rely on isolated and rather poorly structured text documents. In this paper we propose an approach enabling the use of product model data as a primary source of engineering knowledge to support information externalisation from relevant construction documents, to provide for domain-specific information retrieval, and to help in re-organising and re-contextualising documents in accordance to the user's discipline-specific tasks and information needs. Suggested is a retrieval and mining framework combining methods for analysing text documents, filtering product models and reasoning on Bayesian networks to explicitly represent the content of text repositories in personalisable semantic content networks. We describe the proposed basic network that can be realised on short-term using minimal product model information as well as various extensions towards a full-fledged added value integration of document-based and model-based information.}, subject = {Bauwerk}, language = {en} } @inproceedings{BedardMoraRivard2004, author = {B{\´e}dard, Claude and Mora, Rodrigo and Rivard, Hugues}, title = {A Framework for Computer-Aided Conceptual Design of Building Structures}, doi = {10.25643/bauhaus-universitaet.101}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1018}, year = {2004}, abstract = {This paper describes a framework for computer-aided conceptual design of building structures that results from building architectural considerations. The central task that is carried out during conceptual design is the synthesis of the structural system. This paper proposes a methodology for the synthesis of structural solutions. Given the nature of architectural constraints, user-model interactivity is devised as the most suitable computer methodology for driving the structural synthesis process. Taking advantage of the hierarchical organization of the structural system, this research proposes a top-down approach for structural synthesis. Through hierarchical refinement, the approach lends itself to the synthesis of global and local structural solutions. The components required for implementing the proposed methodology are briefly described. The main components have been incorporated in a proof-of-concept prototype that is being tested and validated with actual buildings.}, subject = {Konzipieren }, language = {en} } @inproceedings{RickeltReese2004, author = {Rickelt, Christian and Reese, Stefanie}, title = {A model adaptive and model reduction strategy combining system-theoretical methods and substructuring}, doi = {10.25643/bauhaus-universitaet.151}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1516}, year = {2004}, abstract = {This paper focuses on a new three-level discretisation strategy which enables the transition between continuum/structural (I) and structural/black box modelling (II). The transition (I) is realised by means of a model adaptive concept based on an innovative finite element technology. For transition (II) we apply the truncated balanced realisation method (TBR). The latter represents an established system theoretical model reduction technique which is here combined with a novel substructure technique. The approach provides a modular concept to facilitate the computational analysis of complex structures. The final goal is to apply the strategy to life time estimation.}, subject = {Adaptives System}, language = {en} } @inproceedings{TahaSherifHegger2004, author = {Taha, M. M. Reda and Sherif, Alaa and Hegger, Josef}, title = {A nouvelle approach for predicting the shear cracking angle in RC and PC beams using artificial neural networks}, doi = {10.25643/bauhaus-universitaet.107}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1071}, year = {2004}, abstract = {The truss model for predicting shear resistance of reinforced concrete beams has usually been criticized because of its underestimation of the concrete shear strength especially for beams with low shear reinforcement. Two challengers are commonly encountered in any truss model and are responsible for its inaccurate shear strength prediction. First: the cracking angle is usually assumed empirically and second the shear contribution of the arching action is usually neglected. This research introduces a nouvelle approach, by using Artificial Neural Network (ANN) for accurately evaluating the shear cracking angle of reinforced and prestressed concrete beams. The model inputs include the beam geometry, concrete strength, the shear reinforcement ratio and the prestressing stress if any. ...}, subject = {Neuronales Netz}, language = {en} } @inproceedings{RueppelMeissnerGreb2004, author = {Rueppel, Uwe and Meißner, Udo F. and Greb, Steffen}, title = {A Petri Net based Method for Distributed Process Modelling in Structural Engineering}, doi = {10.25643/bauhaus-universitaet.133}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1338}, year = {2004}, abstract = {The contribution introduces a method for the distributed process modelling in order to support the process orientation in Structural Engineering, i.e., the modelling, analysis and management of planning processes. The approach is based on the Petri Net theory for the modelling of planning processes and workflows in Structural Engineering. Firstly, a central and coarse process model serves as a pre-structuring system for the detailed modelling of the technical planning activities. Secondly, the involved planning participants generate distributed process models with detailed technical workflow information. Finally, these distributed process models will be combined in the central workflow net. The final net is of great importance for the process orientation in Structural Engineering, i.e., the identification, publication, analysis, optimization and finally the management of planning processes.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{FahrigNachtweyGellert2004, author = {Fahrig, Torsten and Nachtwey, Bj{\"o}rn and Gellert, Sebastian}, title = {A Product Model based Approach to Interactive CAE Design Optimization}, doi = {10.25643/bauhaus-universitaet.190}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1901}, year = {2004}, abstract = {We present a software prototype for fluid flow problems in civil engineering, which combines essential features of Computational Steering approaches with efficient methods for model transfer and high performance computing. The main components of the system are described: - The modeler with a focus on the data management of the product model - The pre-processing and the post-processing toolkit - The simulation kernel based on the Lattice Boltzmann method - The required hardware for real-time computing}, subject = {Produktmodell}, language = {en} } @inproceedings{KitagawaTanakaFuruta2004, author = {Kitagawa, Estuji and Tanaka, Shigenori and Furuta, Hitoshi}, title = {A research about the automatic construction of Web/3D model house from 2D digital pictures}, doi = {10.25643/bauhaus-universitaet.170}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1702}, year = {2004}, abstract = {In recent years, the survey is performed for repair, such as a bridge and a building built in past, spending great expense. And it is anxious for the survey technique that doesn't need cost and time more. Then, we made an idea of the technique of precise 3D model creation by 2D pictures. However, the technique of performing the improvement in accuracy of convergent photographing and automatic acquisition of corresponding points was not established. Therefore, in this research, we try to obtain a semi-automation of corresponding points acquisition from initial corresponding points and the improvement in accuracy of convergent photographing. Moreover, we applied the research to the used house of Japanese real estate, and the applicable field was selected as the high needs of the residence of 3D model. And we developed the system that everyone could create Web / 3D model house by VRML easily without requiring expensive apparatuses or expertise.}, subject = {Architektur}, language = {en} } @inproceedings{ChengLauLaw2004, author = {Cheng, Jinxing and Lau, Gloria and Law, Kincho}, title = {A simulation access language and framework for project management applications}, doi = {10.25643/bauhaus-universitaet.156}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1567}, year = {2004}, abstract = {As computer programs become ever more complex, software development has shifted from focusing on programming towards focusing on integration. This paper describes a simulation access language (SimAL) that can be used to access and compose software applications over the Internet. Specifically, the framework is developed for the integration of tools for project management applications. The infrastructure allows users to specify and to use existing heterogeneous tools (e.g., Microsoft Project, Microsoft Excel, Primavera Project Planner, and AutoCAD) for simulation of project scenarios. This paper describes the components of the SimAL language and the implementation efforts required in the development of the SimAL framework. An illustration example bringing on-line weather forecasting service for project scheduling and management applications is provided to demonstrate the use of the simulation language and the infrastructure framework.}, subject = {Hochschulbildung}, language = {en} } @inproceedings{JianpingDongpingZhiliang2004, author = {Jianping, Zhang and Dongping, Xiang and Zhiliang, Ma}, title = {A survey on application of information technologies in Chinese construction industry}, doi = {10.25643/bauhaus-universitaet.171}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1717}, year = {2004}, abstract = {The construction industry is a supportive industry in China. IT (information technolgy), including computer technology and communication technology, as a whole is regarded as the most important means to upgrade the construction industry so that research projects were organized by Chinese government to further the application of IT in the construction industry. This study originated from one of the projects and is aimed at grasping the general situation on the application of IT in the construction industry. A questionnaire was designed for the survey, which used stratified proportional sampling method, and was carried out under the help of a government agency. This study can not only provide sound foundation for the government to make relative policies, but also reveal references for the firms in construction industry to apply IT in their business. This paper presents the preliminary result of the survey.}, subject = {Architektur}, language = {en} } @inproceedings{BothKohlerGessmann2004, author = {Both, Petra von and Kohler, Niklaus and Gessmann, Robin}, title = {A virtual life cycle structured platform for building applications}, doi = {10.25643/bauhaus-universitaet.121}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1219}, year = {2004}, abstract = {The development of a life cycle structured cooperation platform is described, which is based on an integrated process and goal-oriented project model. Furthermore the structure of a life cycle oriented object structure model and its implementation in the platform are documented. The complete conceptual model is described, which represents the basis of a lifecycle -oriented structuring of the planning object and supports the thematic classification of the object and project management data.}, subject = {Bauwerk}, language = {en} } @inproceedings{ThurowDonath2004, author = {Thurow, Torsten and Donath, Dirk}, title = {A vision of an adaptive geometry model for computer-assisted building surveying}, doi = {10.25643/bauhaus-universitaet.172}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1722}, year = {2004}, abstract = {The paper describes a concept for the step-by-step computer-aided capture and representation of geometric building data in the context of planning-oriented building surveying. Selected aspects of the concept have been implemented and tested as prototypes. The process of step-by-step capture and representation is determined by the order in which the user experiences the building. Only the information that the user knows (can see) or can reasonably deduce is represented. In addition approaches to the flexible combination of different measuring techniques and geometric abstractions are described which are based upon geodetic computational adjustment.}, subject = {Architektur}, language = {en} } @inproceedings{MenzelDittrichDomschke2004, author = {Menzel, Karsten and Dittrich, J{\"o}rg and Domschke, Sven}, title = {About the implantation process of mobile computing in AEC}, doi = {10.25643/bauhaus-universitaet.110}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1106}, year = {2004}, abstract = {The AEC industry is conscious of the potentials arising from the usage of mobile computer systems to increase productivity by streamlining their business processes. Discussions are no longer on whether or not to use a mobile computer solution, but rather, on how it should be used. However, the implantation process of this new technology in Architecture, Engineering and Construction (AEC) and Facility Management (FM) practise is very slow and should be improved. One way to encourage and ease the usage of mobile computer systems in AEC is a more process-oriented usability and context appropriateness of mobile computer solutions. Context-sensitivity is defined as a crucial feature to be taken into account for further research in the area of Mobile Computing. Context-sensitive, mobile IT-solutions depend on two features: (1) flexible definitions of (construction) processes describing the context and (2) tools for flexible, multi-dimensional information management representing the context. It is on this premise that the authors propose the n-dimensional data management approach for the implementation of mobile computing solutions. In this paper, we analyse working scenarios in the AEC and FM sector, defining context aspects which are transformed and formalized as dimension hierarchies of the envisaged context model.}, subject = {Mobile Computing}, language = {en} } @inproceedings{KatzenbachMeissnerRueppel2004, author = {Katzenbach, Rolf and Meißner, Udo F. and Rueppel, Uwe}, title = {Abstraction of Process Relevant Information from Geotechnical Standards and Regulations}, doi = {10.25643/bauhaus-universitaet.95}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111028-1002}, year = {2004}, abstract = {The paper presents the abstraction of process relevant information in order to enable the workflow management based on semantic data. It is shown for three examples, how the standards define the information needed to perform a certain planning activity. Abstraction of process relevant information is discussed for different granularities of the underlying processmodel. As one possible application ProMiSE is introduced, which uses process relevant data in individual tokens in a petri-net based process-model.}, subject = {Geotechnik}, language = {en} } @inproceedings{FruchterChao2004, author = {Fruchter, Renate and Chao, Yunn Chyi}, title = {AEC Global Teamwork: Emergent Work Processes}, doi = {10.25643/bauhaus-universitaet.191}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1912}, year = {2004}, abstract = {This ethnographic study reports on emerging work processes and practices observed in the AEC (Architecture/Engineering/Construction) Global Teamwork program, i.e., what people experience when interacting with and through collaboration technologies, why people practice in the way they do, how the practice fits into the environment and changes the work patterns. It presents the experience of two high-performance typical but extreme AEC teamwork cases adopting and adapting to collaboration technologies and how these technologies in practice impact their work processes. The findings illustrate the importance of collaboration technologies in cross-disciplinary, global teamwork. Observations indicate that high performance teams that use the collaboration technologies effectively exhibit collaboration readiness at an early stage and manage to define a "third way" to meet the demands of the cross-disciplinary, multi cultural and geographically distributed AEC workspace. The observations and implications represent the blueprint for yearly innovations and improvements to the design of the AEC Global Teamwork program.}, subject = {Hochschulbildung}, language = {en} } @inproceedings{Olivier2004, author = {Olivier, A. H.}, title = {An application-centred framework for distributed engineering applications}, doi = {10.25643/bauhaus-universitaet.135}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1353}, year = {2004}, abstract = {The conceptual structure of an application that can support the structural analysis task in a distributed collaboratory is described in (van Rooyen and Olivier 2004). The application described there has a standalone component for executing the finite element method on a local workstation in the absence of network access. This application is comparable to current, local workstation based finite element packages. However, it differs fundamentally from standard packages since the application itself, and its objects, are adapted to support distributed execution of the analysis task. Basic aspects of an object-oriented framework for the development of applications which can be used in similar distributed collaboratories are described in this paper. An important feature of this framework is its application-centred design. This means that an application can contain any number of engineering models, where the models are formed by the collection of objects according to semantic views within the application. This is achieved through very flexible classes Application and Model, which are described in detail. The advantages of the application-centred design approach is demonstrated with reference to the design of steel structures, where the finite element analysis model, member design model and connection design model interact to provide the required functionality.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{GordonAkinciGarrett2004, author = {Gordon, Chris and Akinci, Burcu and Garrett, James H.}, title = {An Approach for Planning Sensor-Based Inspection of the Built Environment}, doi = {10.25643/bauhaus-universitaet.150}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1500}, year = {2004}, abstract = {The promise of lower costs for sensors that can be used for construction inspection means that inspectors will continue to have new choices to consider in creating inspection plans. However, these emerging inspection methods can require different activities, resources, and decisions such that it can be difficult to compare the emerging methods with other methods that satisfy the same inspection needs. Furthermore, the context in which inspection is performed can significantly influence how well certain inspection methods are suited for a given set of goals for inspection. Context information, such as weather, security, and the regulatory environment, can be used to understand what information about a component should be collected and how an inspection should be performed. The research described in this paper is aimed at developing an approach for comparing and selecting inspection plans. This approach consists of (1) refinement of given goals for inspection, if necessary, in order to address any additional information needs due to a given context and in order to reach a level of detail that can be addressed by an inspection activity; (2) development of constraints to describe how an inspection should be achieved; (3) matching of goals to available inspection methods, and generation of activities and resource plans in order to address the goals; and (4) selection of an inspection plan from among the possible plans that have been identified. The authors illustrate this approach with observations made at a local construction site.}, subject = {Monitor{\"u}berwachung}, language = {en} } @inproceedings{ScheerDosSantosHinks2004, author = {Scheer, Sergio and Dos Santos, Aguinaldo and Hinks, John}, title = {An approach for promoting knowledge exchange on production practices through the Internet}, doi = {10.25643/bauhaus-universitaet.82}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-821}, year = {2004}, abstract = {Recent research shows that current learning strategies in construction industry have not been effective in implementing lean principles in construction. With that in mind the researchers set to investigate an alternative learning strategy in order to promote learning at the international level. A web-based environment, was developed for this project with the intent of promoting learning and knowledge exchange on the theory and practice of "process transparency" across different countries.}, subject = {Bautechnik}, language = {en} } @inproceedings{MaWongYang2004, author = {Ma, Zhiliang and Wong, K. D. and Yang, Jun}, title = {An Approach to Utilizing Exchanged Documents in Construction Projects Based on Data Warehouse Technology}, doi = {10.25643/bauhaus-universitaet.122}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1227}, year = {2004}, abstract = {There are many construction projects in China and mass documents are exchanged among the multi-party, including the owner, the contractor and the engineer in the projects. Based on previous studies, an approach to the utilization of the exchanged documents is established by using data warehouse technology and a prototype system called EXPLYZER is developed. The approach and the prototype system are verified through their application in a construction project. It is concluded that the approach can support the decision-making in project management.}, subject = {Bauwerk}, language = {en} } @inproceedings{O'BrienElMashaleh2004, author = {O'Brien, William and El-Mashaleh, Mohammad}, title = {An Empirical Study Relating Construction Firm Performance and IT Utilization}, doi = {10.25643/bauhaus-universitaet.173}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1739}, year = {2004}, abstract = {This paper examines the impact of information technology (IT) utilization on construction firm performance. Based on empirical data collected from 74 US construction firms, the analyses provide evidence that IT has a positive impact on overall firm performance, schedule performance, and cost performance. Firm performance is a composite score of several metrics of performance: schedule performance, cost performance, customer satisfaction, safety performance, and profit. No relationship is found between IT utilization and customer satisfaction, safety, or profit, although this may be due to limitations of the study given strong correlations between IT utilization and cost and schedule performnance. The empirical evidence of positive association between performance and IT use provided by this research is significant to both construction practice and research literature. This evidence should encourage firms to adopt and invest in IT tools.}, subject = {Architektur}, language = {en} } @inproceedings{LauLaw2004, author = {Lau, Gloria and Law, Kincho}, title = {An Information Infrastructure for Comparing Accessibility Regulations and Related Information from Multiple Sources}, doi = {10.25643/bauhaus-universitaet.192}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1922}, year = {2004}, abstract = {This paper describes a research project that addresses the difficulties in dealing with regulatory documents such as national and regional codes. These documents tend to be voluminous, heavily cross-referenced, possibly ambiguous and even conflicting at times. There are often multiple documents that need to be consulted and satisfied; however it is a difficult task to locate all of the relevant provisions. In addition, sections dealing with the same or similar conceptual ideas sometimes lay down conflicting requirements. We propose a framework for regulation representation, analysis and comparison with emphasis on the extraction of similarities between provisions. We focus on accessibility regulations, whose intent is to provide the same or equivalent access to a building and its facilities for disabled persons. An XML regulatory repository is developed to extract structural as well as non-structural features from government regulations to help user understanding and computational analysis. A similarity analysis is performed between different sources of regulations. In order to achieve a better comparison between provisions, we employ a combination of feature matching and structural analysis. Results are shown on comparisons between American and European codes, as well as on the domain of electronic-rulemaking.}, subject = {Hochschulbildung}, language = {en} } @inproceedings{RaueWeitzmann2004, author = {Raue, Erich and Weitzmann, R{\"u}diger}, title = {Analysis and Design of Hybrid Structures using Optimization Strategies}, doi = {10.25643/bauhaus-universitaet.102}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1023}, year = {2004}, abstract = {The paper gives a general overview and concerns with a specified set of computer-aided analysis modules for hybrid structures loaded by extreme excitations. All problems are solved by methods of linear, quadratic or nonlinear mathematical optimization, that leads to very effective and economic design solutions. All approaches are derived from general optimization problem that can be easily altered to conform to specific design tasks. Some advantages and possibilities of hybrid structural modeling (single or mixed model-supported) are discussed. The methods will be illustrated by an example structure and optimization schemes.}, subject = {Konzipieren }, language = {en} } @inproceedings{JianpingTianyiQiping2004, author = {Jianping, Zhang and Tianyi, Ma and Qiping, Shen}, title = {Application of Data Warehouse and Data Mining in Construction Management}, doi = {10.25643/bauhaus-universitaet.124}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1247}, year = {2004}, abstract = {All construction project are constrained by their schedules, budgets and specifications, and safety and environmental regulations. These constraints made construction management more complex and difficult. At the same time, many historical data that can support the decisions in the future are kept in construction enterprises,. To use the historical data effectively and efficiently, it is essential to apply the data warehouse and data mining technologies. This paper introduces a research which aims to develop a data warehouse system according to the requirements of construction enterprises and use data mining technology to learn useful information and knowledge from the data warehouse system. The design, the development and the application of this system are detailedly introduced in this paper.}, subject = {Bauwerk}, language = {en} } @inproceedings{ZarliStorerKazi2004, author = {Zarli, Alain and Storer, Graham and Kazi, Abdul Samad (Sami)}, title = {Building a Better Future: Major Results from the ICCI Cluster Project}, doi = {10.25643/bauhaus-universitaet.199}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1994}, year = {2004}, abstract = {To support research in the building sector and in order to help it move towards a new digital economy, the European Commission under the 5th Framework initiative, especially the IST programme, funded various RTD projects. The opportunity to bring these IST projects together was acknowledged so that stronger links can be created under a clustering umbrella and that, moreover, links of those projects with their RTD environment could be facilitated. This has been the objective of work carried out within the ICCI (IST-2001-33022) Cluster project. This paper introduces the main aims and objectives of the project, and then presents its principal outcomes. In a second part, it synthesises the underlying concepts, technology and tools that will make ICT-based Construction a reality in a near future, and gives recommended actions for the industry, the EC and the Construction ICT R\&D in Europe, giving some benefit of this project experience to the three communities.}, subject = {Forschung}, language = {en} } @inproceedings{GebbekenPfeifferVidekhina2004, author = {Gebbeken, Norbert and Pfeiffer, Eberhard and Videkhina, Inna}, title = {Calculation of beam structures with the symbolic computer language Maple}, doi = {10.25643/bauhaus-universitaet.84}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-845}, year = {2004}, abstract = {Beside the standard calculation programs for civil engineering buildings mathematical programs have been lately established for the solution of differential equations for the analysis of mechanical and static systems. Programs like Maple, Matlab, MathCAD and Mathematica are popular in this field. To the knowledge of the authors, the widest application functionality offers the program Maple. Its advantages are, e.g. the alternatively symbolic or numerical solution of differential equation systems, the easy handling of parameter studies, the immediate visualization of results, the definition of macros for selected calculation steps and their export in other computer languages and, not least, the automatically generated, very clear documentation of the matehematical calculus.}, subject = {Bautechnik}, language = {en} } @inproceedings{Hartmann2004, author = {Hartmann, Ulrich C.}, title = {Collaboration in AEC Design : Web-enabling Applications using Peer-to-Peer Office Communicator}, doi = {10.25643/bauhaus-universitaet.138}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1386}, year = {2004}, abstract = {A market analysis conducted by Gartner Dataquest in August 2001 has shown the typical characteristics of the AEC design process. High volatility in membership of AEC design groups and members dispersed over several external offices is the common collaboration scenario. Membership is most times short lived, compared to the overall duration of the process. A technical solution has to take that into account by making joining and leaving a collaborative work group very easy. The modelling of roles of collaboration between group members must be based on a commonly understood principle like the publisher / subscriber model, where the individual that is responsible for the distribution of vital information is clear. Security issues and trust in the confidentiality of the system is a central concern for the acceptance of the system. Therefore, keeping the subset of data that will be published under the absolute control of the publisher is a must. This is not the case with server-based scenarios, sometimes even due to psychological reasons. A loosely bound Peer-to-Peer network offers advantages over a server-based solution, because of less administrative overhead and simple installation procedures. In a peer-to-peer environment, a publish/subscribe role model can be more easily implemented. The publish/subscribe model matches the way AEC processes are modelled in real world scenarios today, where legal proof of information exchange between external offices is of high importance. Workflow management systems for small to midsize companies of the AEC industry may adopt the peer-to-peer approach to collaboration in the future. Further investigations are being made on the research level (WINDS) by integrating the viewer and redlining application Collaborate! into a collaborative environment.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{HassanShelbournCarter2004, author = {Hassan, Tarek and Shelbourn, Mark and Carter, Chris}, title = {Collaboration in Construction: Legal and Contractual Issues in ICT Applications}, doi = {10.25643/bauhaus-universitaet.2007}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2005}, year = {2004}, abstract = {The construction industry is a project-based business bringing together many different organisations to complete a desired goal. The strategic use of Information and Communication Technologies (ICT) has enabled this goal to be completed more effectively. Two issues require addressing, the technology itself and the implementation factors of the technology. Such implementation factors should consider, among other factors, the legal and contractual issues associated with the use of ICT, training requirements and its effects on the organisational culture. To date the legal and contractual issues have not been extensively covered, and it is recognised that the technologies have not been properly covered by any recognised legal and contractual practices. This in turn is threatening to inhibit the growth and prosperity of the use of the technology on construction projects. This paper discusses these legal and contractual issues and describes methods and tools that can be used to enable the growth of technology to be used in a legal and contractually valid environment.}, subject = {Forschung}, language = {en} } @inproceedings{SoibelmanO'BrienElvin2004, author = {Soibelman, Lucio and O'Brien, William and Elvin, George}, title = {Collaborative Design Processes: A Class on Concurrent Collaboration in Multidisciplinary Design}, doi = {10.25643/bauhaus-universitaet.194}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1948}, year = {2004}, abstract = {The rise of concurrent engineering in construction demands early team formation and constant communication throughout the project life cycle, but educational models in architecture, engineering and construction have been slow to adjust to this shift in project organization. Most students in these fields spend the majority of their college years working on individual projects that do not build teamwork or communication skills. Collaborative Design Processes (CDP) is a capstone design course where students from the University of Illinois at Urbana-Champaign and the University of Florida learn methods of collaborative design enhanced by the use of information technology. Students work in multidisciplinary teams to collaborate from remote locations via the Internet on the design of a facility. An innovation of this course compared to previous efforts is that students also develop process designs for the integration of technology into the work of multidisciplinary design teams. The course thus combines both active and reflective learning about collaborative design and methods. The course is designed to provide students the experience, tools, and methods needed to improve design processes and better integrate the use of technology into AEC industry work practices. This paper describes the goals, outcomes and significance of this new, interdisciplinary course for distributed AEC education. Differences from existing efforts and lessons learned to promote collaborative practices are discussed. Principal conclusions are that the course presents effective pedagogy to promote collaborative design methods, but faces challenges in both technology and in traditional intra-disciplinary training of students.}, subject = {Hochschulbildung}, language = {en} } @inproceedings{MilesJoitaBurnap2004, author = {Miles, John and Joita, Liviu and Burnap, Peter}, title = {Collaborative Engineering: Virtual Teams in a Grid Environment Supporting Consortia in the Construction Industry}, doi = {10.25643/bauhaus-universitaet.136}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1362}, year = {2004}, abstract = {In the AEC (Architecture / Engineering / Construction) industry a number of individuals and organisations collaborate and work jointly on a construction project. The resulting consortium has large pool of expertise and experience and can be defined as a Virtual Organisation (VO) formed for the duration of the project. VOs are electronically networked organisations where IT and web based communication technology play an important role in coordinating various activities of these organisations. This paper describes the design, development and implementation of a Grid enabled application called the Product Supplier Catalogue Database (PSCD) which supports collaborative working in consortia. As part of the Grid-enabling process, specialised metadata is being developed to enable PSCD to effectively utilise Grid middleware such as Globus and Java CoG toolkits. We also describe our experience whilst designing, developing and deploying the security service of the application using the Globus Security Interface (GSI).}, subject = {Ingenieurbau}, language = {en} } @inproceedings{FruchterSaxenaBreidenthal2004, author = {Fruchter, Renate and Saxena, Kushagra and Breidenthal, Matt}, title = {Collaborative Exploration of Rich Content in Support of Knowledge Re-use}, doi = {10.25643/bauhaus-universitaet.195}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1952}, year = {2004}, abstract = {A/E/C Team members, while collaborating on building projects, rely on past experiences and content through the use of project design archives (whether in paper or digital format). This leads to underutilization of potential knowledge, as decision-making of data, information, and knowledge reuse is limited by access to these archives, due to sheer size and inconvenient presentation. This paper presents an integrated solution that leverages two technologies CoMem (Corporate Memory) and iRoom (interactive Room) developed at Stanford. This addresses critical limitations, i.e., content, context, visualization and interactivity, constraining the process of collaborative exploration towards knowledge reuse and decision-making.}, subject = {Hochschulbildung}, language = {en} } @inproceedings{KoenigBauriedel, author = {K{\"o}nig, Reinhard and Bauriedel, Christian}, title = {Computer-generated Urban Structures}, series = {Proceedings of the Generative Art Conference}, booktitle = {Proceedings of the Generative Art Conference}, address = {Milan, Italy}, doi = {10.25643/bauhaus-universitaet.2609}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20160623-26090}, pages = {1 -- 10}, abstract = {How does it come to particular structure formations in the cities and which strengths play a role in this process? On which elements can the phenomena be reduced to find the respective combination rules? How do general principles have to be formulated to be able to describe the urban processes so that different structural qualities can be produced? With the aid of mathematic methods, models based on four basic levels are generated in the computer, through which the connections between the elements and the rules of their interaction can be examined. Conclusions on the function of developing processes and the further urban origin can be derived.}, language = {en} } @inproceedings{KatzenbachGiere2004, author = {Katzenbach, Rolf and Giere, Johannes}, title = {Coordinating Planning Processes in AEC using an Adaptable Process Model}, doi = {10.25643/bauhaus-universitaet.94}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-946}, year = {2004}, abstract = {The contribution introduces an adaptable process model to meet the special requirements of the coordination of planning activities in AEC (Architecture, Engineering, Construction). The process model is based on the concept of Coloured Petri-Nets and uses metainformation to characterize process-relevant information and to enable process-control based on the actual results of the planning.}, subject = {Prozessmodell}, 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{CheungNoruziaanLi2004, author = {Cheung, Moe M. S. and Noruziaan, Bahman and Li, W. C.}, title = {Data acquisition, processing and management systems for a Canadian bridge monitoring project}, doi = {10.25643/bauhaus-universitaet.123}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1235}, year = {2004}, abstract = {This paper will present a number of technical aspects for one of the most elaborate instrumentation and data acquisition projects ever undertaken in Canada. Confederation Bridge, the longest bridge built over ice covered seawater has been equipped with the state of the art data acquistition devices and systems as well as data transfer networks. The Bridge has been providing a fixed surface connection between Prince Edward Island and Province of New Brunswick in Canada since its opening in 1997. The Bridge has a rather long design service life of 100 years. Because of its large size and long span length, its design is not covered by any existing codes or standards worldwide. The focus of the paper is to introduce the data acquisition, transfer, processing and management systems. The instrumentation and communications infrastructure and devices will be presented in some details along with the data processing and management systems and techniques. Teams of engineers and researchers use the collected data to verify the analysis and design assumptions and parameters as well as investigate the short-term and long-term behaviour and health of the Bridge. The collected data are also used in furthering research activities in the field of bridge engineering and in elevating our knowledge about behaviour, reliability and durability of such complex structures, their components and materials.}, subject = {Bauwerk}, language = {en} } @inproceedings{LiuSoibelmanWu2004, author = {Liu, Liang and Soibelman, Lucio and Wu, Jianfeng}, title = {Data Fusion and Modeling for Construction Management Knowledge Discovery}, doi = {10.25643/bauhaus-universitaet.125}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1254}, year = {2004}, abstract = {Advances in construction data analysis techniques have provided useful tools to discover explicit knowledge on historical databases supporting project managers' decision making. However, in many situations, historical data are extracted and preprocessed for knowledge discovery based on time-consuming and problem-specific data preparation solutions, which often results in inefficiencies and inconsistencies. To overcome the problem, we are working on the development of a new data fusion methodology, which is designed to provide timely and consistent access to historical data for efficient and effective management knowledge discovery. The methodology is intended to be a new bridge between historical databases and data analysis techniques, which shields project managers from complex data preparation solutions, and enables them to use discovered knowledge for decision making more conveniently. This paper briefly describes the motivation, the background and the initial results of the ongoing research.}, subject = {Bauwerk}, language = {en} } @inproceedings{Pavlov2004, author = {Pavlov, Alexander}, title = {Data Transfer and Objects Recognition in Building Design}, doi = {10.25643/bauhaus-universitaet.126}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1265}, year = {2004}, abstract = {The problem of data interoperability is now very important. The formal description of construction systems and objects must base upon the modeling for the description of construction data domain. The XML-language was selected as a basis of a universal data format, ensuring natural hierarchy of objects, flexibility, good layout and expandability. The language, developed by the author, is called Building Object Description Extensible Markup Language (bodXML). The types of all objects used by data transfer should be definite beforehand with existing methods of programming. It limits the possibilities of IT in application of new types. But the recipient software must recognize the building objects even if the kind of object is unknown at the outset. The author offers a set of main topological and geometric properties being sufficient for recognition of main three-dimensional building constructions with flat edges. The tests of artificial neuron network have shown that the recognition of a kind of the constructions represented as a set of indicated parameters happens enough confidently.}, subject = {Bauwerk}, language = {en} } @inproceedings{LaehrBletzinger2004, author = {L{\"a}hr, Andr{\´e} and Bletzinger, Kai-Uwe}, title = {Design of an Analysis Environment for Planning Decision Support}, doi = {10.25643/bauhaus-universitaet.1370}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1370}, year = {2004}, abstract = {In this contribution, the design of an analysis environment is presented, that supports an analyst to come to a decision within a gradual collaborative planning process. An analyst represents a project manager, planner or any other person, involved in the planning process. Today, planning processes are managed by several geographically distributed planners and project managers. Thus, complexity of such a process rises even more. Prediction of consequences of many planning decisions is not possible, in particular since assessment of a planning advance is not trivial. There have to be considered several viewpoints, that depend on individual perceptions. In the following, methods are presented to realize planning decision support.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{ChouHsieh2004, author = {Chou, Yu-Hur and Hsieh, Shang-Hsien}, title = {Design of Partial Scoring Assessment System for Reinforcement Concrete Design Course : Development of Partial Scoring Assessment System for Reinforcement Concrete Design Course}, doi = {10.25643/bauhaus-universitaet.90}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-905}, year = {2004}, abstract = {In the field of Civil Engineering, the content of reinforcement concrete design course (RC course) has complicated design procedures and many difficult specifications to recognize, so most of the students regard the RC course a tough course, and teachers very often find the class time insufficient. Also, teachers of the RC course usually spend a lot of time in organizing the examinations for handling tedious calculations and complicated logical reasoning. Furthermore, correcting examination papers with partial scoring takes even more time of the teacher's. Therefore, the objective of this research is to design and develop a partial scoring assessment system to meet the needs in engineering design courses, such as the RC course. This assessment system can generate test items with variable parameters. It also supports inference diagnosis on the examinee's misconceptions and gives partial scores in grading the examination. In this research, the example test subject is the analysis of rectangular reinforced concrete beam with single layer steel bars.}, subject = {Bautechnik}, language = {en} } @inproceedings{TsouLamWong2004, author = {Tsou, Jin-Yeu and Lam, Selina and Wong, Wing Kin Gary}, title = {Design of Rapidly Assembled Isolation Patient Ward - IT-Supported Collaborative Design Process between Architects and Medical Officers}, doi = {10.25643/bauhaus-universitaet.174}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1748}, year = {2004}, abstract = {An important feature of the 2003 SARS outbreak in Canada, Singapore, and Hong Kong was that many health care workers (HCWs) developed SARS after caring for patients with SARS. This has been ascribed to inadequate or ineffective patient isolation. However, it is difficult for dense cities to provide sufficient isolation facilities within a short period of time. This has raised concerns from the public for new strategies in the planning and design of isolation facilities. Considering that SARS or other infectious diseases could seriously damage our society's development, isolation facilities that could be rapidly and economically constructed with appropriate environmental controls are essential. For this reason, the design team of the Department of Architecture collaborated with a special task force from the Faculty of Medicine, who are the frontline medical officers treating the SARS patients, to design Rapidly Assembled Isolation Patient Wards. Both architecture and medicine are well established disciplines, but they have little in common in terms of the mode of knowledge construction and practice. This induced much intellectual exploration and research interest in conducting this study. The process has provided an important reference for cross disciplinary studies between the architectural and medical domains.}, subject = {Architektur}, language = {en} } @inproceedings{YahiaouiHensenSoethout2004, author = {Yahiaoui, Azzedine and Hensen, Jan and Soethout, Luc}, title = {Developing CORBA-based distributed control and building performance environments by run-time coupling}, doi = {10.25643/bauhaus-universitaet.134}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1347}, year = {2004}, abstract = {Communication software and distributed applications for control and building performance simulation software must be reliable, efficient, flexible, and reusable. This paper reports on progress of a project, which aims to achieve better integrated building and systems control modeling in building performance simulation by run-time coupling of distributed computer programs. These requirements motivate the use of the Common Object Request Broker Architecture (CORBA), which offers sufficient advantage than communication within simple abstraction. However, set up highly available applications with CORBA is hard. Neither control modeling software nor building performance environments have simple interface with CORBA objects. Therefore, this paper describes an architectural solution to distributed control and building performance software tools with CORBA objects. Then, it explains how much the developement of CORBA based distributed building control simulation applications is difficult. The paper finishes by giving some recommendations.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{Lee2004, author = {Lee, Yungui}, title = {Development and application of CAD software in the field of building structures in China}, doi = {10.25643/bauhaus-universitaet.89}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-898}, year = {2004}, abstract = {PKPM series CAD software is an integrated CAD system for building design, which integrated the following parts: architectural design, structural design, building service design and statistic analysis of quantity and budget. These four parts share the same database with high efficiency. Over 80\% of design corporation in China are using PKPM series CAD software. The detailed information and some key modules of PKPM series CAD software are mainly introduced in this paper.}, subject = {Bautechnik}, language = {en} } @inproceedings{HoyanoNakaohkuboAsawa2004, author = {Hoyano, Akira and Nakaohkubo, Kazuaki and Asawa, Takashi}, title = {Development of Thermal Simulation Tool for Urban Block Design - Based on Numerical Simulation System using 3D}, doi = {10.25643/bauhaus-universitaet.97}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-973}, year = {2004}, abstract = {A simulation system has been developed as a computer aided design tool to evaluate the effect of proposed design on the thermal environment during the designing process. This system calculates outdoor surface temperatures in order to evaluate the thermal impact of a design factor in outdoor space. In this study, the previous heat balance simulation system was improved to predict the surface temperature of a proposed design using 3D-CAD. This system is able to input the complicated outdoor spatial forms ef\&\#64257;ciently and also to evaluate the surface temperature distribution from any viewpoint.}, subject = {Stadtplanung}, language = {en} } @inproceedings{FloodIssaAbuShdid2004, author = {Flood, Ian and Issa, Raja and Abu-Shdid, Caesar}, title = {Developments in Hyper Real-Time Simulation of Transient Heat-Flow in Buildings}, doi = {10.25643/bauhaus-universitaet.196}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1961}, year = {2004}, abstract = {This paper reports on the latest results in the development of a new approach for simulating the thermal behavior of buildings that overcomes the limitations of conventional heat-transfer simulation methods such as FDM and FEM. The proposed technique uses a coarse-grain approach to model development whereby each element represents a complete building component such as a wall, internal space, or floor. The thermal behavior of each coarse-grain element is captured using empirical modeling techniques such as artificial neural networks (ANNs). The main advantages of the approach compared to conventional simulation methods are: (a) simplified model construction for the end-user; (b) simplified model reconfiguration; (c) significantly faster simulation runs (orders of magnitude faster for two and three-dimensional models); and (d) potentially more accurate results. The paper demonstrates the viability of the approach through a number of experiments with a model of a composite wall. The approach is shown to be able to sustain highly accurate longterm simulation runs, if the coarse-grain modeling elements are implemented as ANNs. In contrast, an implementation of the coarse-grain elements using a linear model is shown to function inaccurately and erratically. The paper concludes with an identification of on-going work and future areas for development of the technique.}, subject = {Hochschulbildung}, language = {en} } @inproceedings{Planker2004, author = {Planker, Markus}, title = {Die Aufsichtspflicht (und Kl{\"a}rungspflicht) des Architekten, Architekten- und Ingenieurhaftung, Berufshaftpflichtversicherungen}, doi = {10.25643/bauhaus-universitaet.722}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-7227}, year = {2004}, abstract = {Der Architektenvertrag als Werkvertrag (Konsequenzen: Haftung f{\"u}r den Werkerfolg, keine abschließende Bestimmung des vom Architekten geschuldeten Leistungsumfanges durch den T{\"a}tigkeitskatalog etwa von \S 15 HOAI), vertragliche und außervertragliche Haftungstatbest{\"a}nde (vertragliche Anspr{\"u}che des Auftraggebers gegen den Architekten, Haftung gegen{\"u}ber Dritten aufgrund des Architektenvertrages), typische Haftungsrisiken des Architekten, insbesondere im Kostenbereich sowie f{\"u}r Planungs- und Objekt{\"u}berwachungsfehler (Haftung des Architekten f{\"u}r {\"U}berschreitung der Baukosten, Architektenhaftung bei Planungs- und Objekt{\"u}berwachungsfehlern), Zul{\"a}ssigkeit der Vereinbarung von Haftungsbeschr{\"a}nkungen, Berufshaftpflichtversicherung f{\"u}r Architekten und Ingenieure}, subject = {Baubetriebslehre}, language = {de} } @inproceedings{FruchterDemianSaxena2004, author = {Fruchter, Renate and Demian, Peter and Saxena, Kushagra}, title = {Discovery of Re-usable Architecture/Engineering Construction Knowledge Trough Exploration of a Corporate Memory : Chance Discovery of Reusable AEC Knowledge from a Corporate Memory}, doi = {10.25643/bauhaus-universitaet.193}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1932}, year = {2004}, abstract = {Re-using knowledge in architecture, engineering and construction (AEC) firms can lead to greater competitive advantage, improved designs, and more effective management of constructed facilities. This paper discusses the importance of exploration and discovery of reusable knowledge from a corporate archive as opposed to simple search and retrieval. We describe and illustrate through a scenario of use an exploration framework and prototype, CoMemTM that formalizes the added value of exploration in the process of knowledge reuse. We discuss two exploration activities: (i) Breadth- Only overview exploration that assist a user to rapidly localize pockets of re-usable knowledge from the large corporate archive and (ii) Iterative breadth-depth exploration that enables a user to identify those re-usable components of the Corporate Memory that may yield design issues that were not originally considered.}, subject = {Hochschulbildung}, 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{WellmannJelicBaitschHartmann2004, author = {Wellmann Jelic, Andres and Baitsch, Matthias and Hartmann, Dietrich}, title = {Distributed computing of failure probabilities for structures in civil engineering}, doi = {10.25643/bauhaus-universitaet.103}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1030}, year = {2004}, abstract = {In this contribution the software design and implementation of an analysis server for the computation of failure probabilities in structural engineering is presented. The structures considered are described in terms of an equivalent Finite Element model, the stochastic properties, like e.g. the scatter of the material behavior or the incoming load, are represented using suitable random variables. Within the software framework, a Client-Server-Architecture has been implemented, employing the middleware CORBA for the communication between the distributed modules. The analysis server offers the possibility to compute failure probabilities for stochastically defined structures. Therefore, several different approximation (FORM, SORM) and simulation methods (Monte Carlo Simulation and Importance Sampling) have been implemented. This paper closes in showing several examples computed on the analysis server.}, subject = {Konzipieren }, 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} }