@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} } @article{VogelBreitMaerki2004, author = {Vogel, Manfred and Breit, Manfred and M{\"a}rki, Fabian}, title = {Optimization of 4D Process Planning using Genetic Algorithms}, doi = {10.25643/bauhaus-universitaet.236}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-2360}, year = {2004}, abstract = {The presented work focuses on the presentation of a discrete event simulator which can be used for automated sequencing and optimization of building processes. The sequencing is based on the commonly used component-activity-resource relations taking structural and process constraints into account. For the optimization a genetic algorithm approach was developed, implemented and successfully applied to several real life steel constructions. In this contribution we discuss the application of the discrete event simulator including its optimization capabilities on a 4D process model of a steel structure of an automobile recycling facility.}, subject = {Produktmodell}, language = {en} } @inproceedings{Huhnt2004, author = {Huhnt, Wolfgang}, title = {Progress Measurement in Planning Processes on the Base of Process Models}, doi = {10.25643/bauhaus-universitaet.166}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1664}, year = {2004}, abstract = {This paper presents a specific modeling technique that is focused on preparing planning processes in civil engineering. Planning processes in civil engineering are characterized by some peculiarities so that the sequence of planning tasks needs to be determined for each planning project. Neither the use of optimized partial processes nor the use of lower detailed and optimized processes guarantee an optimal overall planning process. The modeling technique considers these peculiarities. In a first step, it is focused on the logic of the planning process. Algorithms based on the graph theory determine that logic. This approach ensures consistency and logical correctness of the description of a planning process at the early beginning in its preparation phase. Sets of data - the products of engineers like technical drawings, technical models, reports, or specifications - form the core of the presented modeling technique. The production of these sets of data requires time and money. This is expressed by a specific weighting of each set of data in the presented modeling technique. The introduction of these weights allows an efficient progress measurement and controlling of a planning project. For this purpose, a link between the modeling technique used in the preparation phase and the execution phase is necessary so that target and actual values are available for controlling purposes. The present paper covers the description of this link. An example is given to illustrate the use of the modeling technique for planning processes in civil engineering projects.}, subject = {Baubetrieb}, language = {en} } @inproceedings{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} } @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} } @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{Schneider2004, author = {Schneider, Mike}, title = {Radio Frequency Identification (RFID) Technology and its Applications in the Commercial Construction Industry}, doi = {10.25643/bauhaus-universitaet.106}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1061}, year = {2004}, abstract = {This paper is a report of Radio Frequency Identification (RFID) technology and its potential applications in the commercial construction industry. RFID technology offers wireless communication between RFID tags and readers with non line-of-sight readability. These fundamental properties eliminate manual data entry and introduce the potential for automated processes to increase project productivity, construction safety, and project cost efficiency. Construction contractors, owners, and material suppliers that believe technology can further develop methods and processes in construction should feel obligated to participate in RFID studies for the advancement of the construction industry as a whole.}, subject = {RFID}, 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} } @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{RobertNicoudRaphaelSmith2004, author = {Robert-Nicoud, Yvan and Raphael, Benny and Smith, Ian F. C.}, title = {Using entropy to maximize the usefulness of data collection}, doi = {10.25643/bauhaus-universitaet.117}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1177}, year = {2004}, abstract = {This paper presents a generic methodology for measurement system configuration when the goal is to identify behaviour models that reasonably explain observations. For such tasks, the best measurement system provides maximum separation between candidate models. In this work, the degree of separation between models is measured using Shannon's Entropy Function. The location and type of measurement devices are chosen such that the entropy of candidate models is greatest. This methodology is tested on a laboratory structure and, to demonstrate generality, an existing fresh water supply network in a city in Switzerland. In both cases, the methodology suggests an appropriate set of sensors for identifying the state of the system.}, subject = {Mobile Computing}, language = {en} }