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Fruchter R, Reiner K, Yen S, Retik A

KISS: knowledge and information slider system

Abstract: "Computer-based representation, capture, linking, visualization, navigation, and use of the information and knowledge created in a multi-disciplinary project environment during concept development, design, and construction remains a difficult problem. This paper proposes to present a methods and an integrated prototype, Knowledge and Information Slider System (KISS), for knowledge management and navigation of heterogeneous information that constitutes a design and build project memory. KISS proposes a product-based, context-based, Web-mediated approach for project, product, and process evolution capture, organization, and navigation. The prototype formally articulates and links the following four network levels: people network, design informal knowledge network, design and construction formal knowledge network, and construction site knowledge network. KISS enables key stakeholders involved in “building a building” to seamlessly slide among the different knowledge network levels to retrieve and re-use information in support of their decision process. The paper will present a real-world project as a case study to test the KISS prototype. The paper will present the KISS prototype that leverages the R and D efforts of the Stanford and Strathclyde research teams. More specifically, ·Recall and ProMem collaboration technologies developed at Stanford to support the concept generation, multi-disciplinary team interaction and design intent evolution capture; and ·Virtual Construction Simulation and Construction Site Telepresence information technologies developed at Strathclyde University to facilitate virtual reality modeling of the design and construction process, and mobile telecommunication to capture and link the construction site information with the office, respectively. Figure 1 illustrates these information and collaboration technologies as building block that can cover the spectrum of knowledge and information, from informal to formal, during design and construction from concept to construction. It will enable the stakeholders to seamlessly slide through the informal and formal knowledge created over time on-an-as-need basis"

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Full text: content.pdf (368,170 bytes) (available to registered users only)

Series: w78:2000 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.communication (0.033641) class.man-man (0.020884) class.synthesis (0.018070)
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Permission to reproduce these documents have been graciously provided by Icelandic Building Research Institute. The assistance of the editor, Mr. Gudni Gudnason, is gratefully appreciated


Futcher K, Thorpe T

Longitudinal-grounded case study of a project management information system: a reality check.

Abstract: This paper presents the methodology and findings of a longitudinal-grounded case study of the ambitious implementation of a PMIS within the public works organization of the HKG SAR. It has provided an opportunity for practical experimentation through the quantitative measurement of 'before' and 'after' effects arising from a change in management techniques. These were substantially dependent upon the introduction of a novel PMIS that conformed to the Cleland and King model for a portfolio-management-system that is added-value gained from a project-management data pipeline. The timing of the implementation and its attributes makes it an appropriate vehicle for experimentation to substantiate the Cleland and King proposition for project and portfolio management in multi-projects scenarios. A triangulated-search of the case files covering all aspects of the implementation of the PMIS provides a reality check of the construction business issues that drive systems implementation. It leads to the observation that empirical research into the day-to-day reality of IT innovation within the industry is essential if the gap between research and practice is to be narrowed. Pre and post implementation measurements of performance are used to assess the results achieved from this example of in-practice innovation. At least a three-fold improvement in spending performance was achieved when five years post implementation performance was compared to the five-year pre-implementation period.

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Full text: content.pdf (64,960 bytes) (available to registered users only)

Series: w78:2002 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.represent (0.011734) class.impact (0.010804) class.commerce (0.010593)
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Permission to reproduce these documents have been graciously provided by the Aarhus School of Architecture, Denmark. The assistnace of the editor, Prof. Kristian Agger, is gratefully aprecciated.


G Zimmermann & G Suter

A multi-floor topology to geometry transformation procedure based on shape functions

Abstract: Building floor plans are often outlined as schematics with zero wall thickness. Using shape functions, wall dimensions and circulation areas can be inserted and more detailed drawings generated. This topology-to-geometry transformation does not solve vertical constraints in multi-floor topologies, as for example the alignment of load bearing walls. The paper shows how dissection based rectangular floor plans can be modified by introducing space area extensions to resolve the vertical constraints. Penalty values can be introduced to control the distribution of area extensions. The algorithm is based on defining constraints between nodes of the dissection tree. In the presence of multiple constraints, several passes through the dissection tree may be necessary. The topology-to-geometry transformation is used in every pass to check if the constraints can be fulfilled. The algorithm is demonstrated with an example.

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Full text: content.pdf (215,962 bytes) (available to registered users only)

Series: w78:2005 (browse)
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Permission to reproduce these papers has been graciously provided by the Technische Universität Dresden.


G. Cagdas

Agent-Based Modeling of User Movements: A Case Study in a Museum Building

Abstract: This study aims to analyze relationships of users and spatial configurations using agent-based simulation systems under certain circumstances in a virtual environment with agents that represent users of a museum building. Multi-agent simulation methods are used to study patterns of user movements. Today, it is feasible to simulate the movement patterns of human societies at catastrophes like fire and earthquake within the buildings. Exposing the dynamics of user-space relationships will help both architectural students and professionals in practice, to observe and solve design problems in design process of museums.

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Full text: content.pdf (955,988 bytes) (available to registered users only)

Series: w78:2009 (browse)
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H Hofmeyer, N ten Heggeler

Structural topologies by iterative multi-load dependent structural grammars and separate volume fraction topology optimisation

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Full text: content.pdf (1,093,109 bytes) (available to registered users only)

Series: w78:2016 (browse)
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Haghighat F

Development of a procedure to evaluate the air leakage distribution from fan pressurization test - validation of three airflow models

Abstract: A number of airflow models have been developed to assist the designer in the design of energy efficient and healthy built environment. The models range from very simple empirical algorithms to calculate the global airflow rate to sophisticated computerized fluid-dynamic techniques solving the Navier-Stokes equations. The multi-zone approach falls between these two extreme cases. This approach assumes that the interior of the building is divided into regions of differing pressures interconnected by leakage paths. The advantage of multi-zone models, besides being able to simulate infiltration in larger buildings, is that they can be used to calculate mass flow interactions between the different zones inside buildings as well as inside and outside. This knowledge is needed for the design of heating/cooling and ventilation systems. An essential part of the development of any computer model is its validation, and the essential information needed for validation of airflow models is the distribution of air leakage distribution. This paper first describes a methodology to distribute global air leakage of whole house and whole garage among cracks and gaps on exterior walls and roof, and report the validation of three airflow models. From the comparisons it can be seen that there are good agreement between the predictions made by the models and measured data, as well as between three models. Therefore, it can be concluded that the methodology for air leakage distribution is correct, and the performances of COMIS, CONTAM and ESP-r for predicting airflow rates in single-family house are similar.

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Full text: content.pdf (198,669 bytes) (available to registered users only)

Series: w78:2003 (browse)
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Permission to reproduce these papers has been graciously provided by the University of Auckland. The assistance of the editor who provided the full texts and the structured metadata, Dr. Robert Amor, is gratefully appreciated.


Han K,Gwak J-Y,Golparvar-Fard M,Saidi K,Cheok G,Franaszek M,Lipman R

Vision-based field inspection of concrete reinforcing bars

Abstract: Concrete reinforcing bars should be accurately placed in the positions shown on the construction drawings, adequately tied and supported before concrete is placed. These elements should be further secured against displacements within the tolerances recommended by project specifications. Ensuring compliance with contract documents and the building code applicable to the project under construction requires photographic documentation and close visual examination by field inspectors. Although inspection procedures are repetitive for every jobsite, the manual inspection methods are time-consuming and non-systematic. Moreover, the current practice of field inspectors walking into rebar cages and footings for close assessments can be a potential safety hazard on jobsites and can damage the integrity of the structure. To minimize the challenges of the current practice, this paper proposes a computer vision-based method for field inspection. In the proposed method, a field inspector can carefully walk around a rebar cage and take a complete collection of images from the underlying structure. Using a vision-based 3D reconstruction pipeline of Structure-from-Motion and Multi-view Stereo algorithms, a dense 3D point cloud model will be generated. Using an algorithm that maps and generates a density histogram of points, the locations and configuration of the rebars are identified. Finally, the spacings between rebars are calculated for field inspection. Experimental results on data collection, analysis, and visualization components of the proposed rebar inspection method is presented. These results show the promise of applying this low-cost approach in practice.

Keywords: Rebar mapping,field inspection,vision-based 3D reconstruction,concrete placement

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Full text: content.pdf (2,283,278 bytes) (available to registered users only)

Series: convr:2013 (browse)
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Hanif Hoseini, Kjartan Gudmundsson, Gudni Jóhannesson

Symphony - Industrial Production Of Multi-Storey Buildings, Report From The Research Tower Project

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Full text: content.pdf (615,507 bytes) (available to registered users only)

Series: w78:2006 (browse)
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Heesom, David

Interactive Generation of 'Multi-Level of Detail' 4D CAD Simulations

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Series: convr:2006 (browse)
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Helena Fernanda, Adriana de Paula Lacerda Santos, Sergio Scheer

Information System for Dynamic Updating of the Planning Work

Abstract: For the sound development of the routine activities in civil construction companies, planning and effective control are necessary for the successful execution of the construction site of enterprises. Therefore, a communication scheme is needed between the office and the construction site staffs, in order to make information available and let it be exchanged in an accurate way by the teams involved in the enterprise. This will allow to make decisions and define processes in proper timing. Considering the education differences between the workers in the construction site and also the informality of the trainings, communication must be not only organized and structured, but, also, affordable. Through the technique of the balance line, a graphic technique that links space and time to organize tasks, and using information technology, this paper proposes the development of an information system capable of the real-time updating of the planning considering what just happened on the construction site. This will promote an easier interaction between the user of the system on the construction site and the users in the planning and management office. Nowadays, this task is accomplished manually, causing information to be always lagged regarding the situation of the work, due to the time required to acquire and process information. Using currently available technologies in order to obtain a user-friendly, interactive control panel in the construction site to transmit information in real time, a panel with multi touch screen technology was proposed, which allows to access information easily, by touching the panel with the fingers. In order to adopt this technology, the proposal defines the structure of an information system for management and control of construction site information, including the documentation of projects, teams and workers data, schedules, updates and related information.

Keywords: planning work; information system; line balance, communication, multi touch screen; panel; technology

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Full text: content.pdf (82,177 bytes) (available to registered users only)

Series: w78:2010 (browse)
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