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Hung-Ming Chen, and Yu-Chin Lin

A Software Framework For Supporting Cluster-To-Cluster Computing On Large-Scale Structural Analysis Problems

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Full text: content.pdf (726,818 bytes) (available to registered users only)

Series: w78:2006 (browse)
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J Zeb,T Froese, D Vanier

DEVELOPMENT AND TESTING OF A PROCESS MATURITY MODEL IN THE DOMAIN OF INFRASTRUCTURE MANAGEMENT

Abstract: As information systems continue to expand their reach into the work process of the construction industry, communication and information exchange that traditionally occurs between humans is increasingly being replaced with automated or semi-automated information exchange between computer systems. These computer-based communications must be more formally defined and designed than the human-based communications that they replace. We are researching techniques to formally represent design information transactions within the construction industry. As part of this work, we are interested in assessing the degree to which information exchange processes are formalized and managed. This paper focuses on the development and application of an Infrastructure Management-Process Maturity Model (IM-PMM) to benchmark the degree of formalization of work and communication processes in the infrastructure management field. The proposed IM-PMM evolved through reviewing a set of relevant maturity models. It uses a scale of five levels of process maturity and is based on three core dimensions (process, actor role, and information definition) to benchmark work processes, plus one dimension (message definition) to benchmark communication processes. The proposed IM-PMM has been applied in the domain of infrastructure management and attempts to benchmark only the asset inventory and condition assessment reporting processes using researcher-administered structured interview approach. From the results of the survey, it is concluded that communication processes in the area of infrastructure management are typically accomplished in an ad hoc (undefined and unstructured) manner, emphasizing the need for improvement if advanced information systems are to be deployed to support efficient management of infrastructure systems.

Keywords: Process Maturity Model, Benchmark, Maturity Stage, Process Formalism, Transaction, Message, Actor-Role, Asset Infrastructure Management, Asset Inventory Management, Asset Condition Assessment

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Full text: content.pdf (181,208 bytes) (available to registered users only)

Series: w78:2011 (browse)
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Jin Zhu, Ali Mostafavi and Jennifer Whyte

Towards Systems Integration Theory in Megaprojects: A System-of-Systems Framework

Abstract: Megaprojects are large-scale, complex projects composed of various interconnected constituents. Recent research suggests that effective systems integration is one of the major challenges affecting the success of their delivery and that we hence need new taxonomies to characterise and evaluate integration in this context. This paper draws on and contributes to a growing literature on systems integration in megaprojects by proposing a formalized framework for characterization and evaluation of integration between constituents of megaprojects. In this study, megaprojects are conceptualized as systems-of-systems (SoSs). Based on this conceptualization, a SoS framework towards a systems integration theory in megaproject SoSs is proposed. The proposed framework includes two aspects. The first articulates the different dimensions of systems integration. It identifies the types of integration; focuses of integration; integration at different levels; and integration in different phases in megaproject SoSs. The second aspect is related to the indicators of systems integration. Seven indicators are discussed for evaluating the degree of integration in megaprojects. The proposed SoS framework provides a theoretical basis for future research on systems integration in megaprojects and can be used as a guide for developing corresponding empirical studies.

Keywords: Megaprojects, Systems Integration, System-Of-Systems

DOI: https://doi.org/10.24928/JC3-2017/0251

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Series: jc3:2017 (browse)
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Jiwen Zhang, Tim Taylor, Roy Sturgill, Gabe Dadi and Nikiforos Stamatiadis

Predictive Risk Modeling of Differential Bridge Settlement

Abstract: Differential settlement between the roadway pavement resting on embankment fill and the bridge abutment built on more rigid foundation often creates a bump when driving from roadway to bridge, and vice versa. This paper studies the problem at a macroscopic level by determining a method to predict the levels of approach settlement to assist designers in developing remediation plans during project development to minimize the lifecycle costs of bridge bump repairs. A macro method considering a combination of maintenance times, maintenance measures, and observed settlement was used to classify the differential settlement scale as minimal, moderate, and severe. A set of project characteristics including approach, abutment type, embankment, foundation, and traffic volume that may influence the formation of differential settlement were identified and used as parameters to develop a model to predict the settlement severity for a given approach. Logistic regression analyses were implemented to identify the relationships between the levels of differential settlement and the input variables for a sample of 600 randomly selected bridges in Kentucky. Geographic region, approach age, average daily traffic, and the use of approach slabs are identified as the four most predominant factors that can significantly affect the formation of differential settlement. Based on the performance of bridge approaches in Kentucky, how those parameters interacted in the prediction model is illustrated in the logistic regressions.

Keywords: Differential Settlement, Logistic Regression, Prediction Model

DOI: https://doi.org/10.24928/JC3-2017/0060

Full text: content.pdf (338,728 bytes) (available to registered users only)

Series: jc3:2017 (browse)
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K A Brunner & A Mahdavi

The software design of a dynamic building model service

Abstract: We present the software architecture and a prototypical implementation of a dynamic building model service system. The primary purpose of this model service is to support (simulation-assisted) indoor-environmental control operations in buildings. However, as a comprehensive, structured, sensor-based, and self-updating information resource, the model can support other building tasks such as those concerned with building logistics and management. At the core of our model service design, an object tree continuously updated from sensor data reflects the current state of the building, concurrently accessible to multiple clients and backed by persistent storage. The service is embedded in a distributed infrastructure based on tuple spaces for transparent object-based communication between system components. The preliminary evaluation of the model service system suggests that the proposed design is feasible and appropriate for further testing in realistic (large-scale) settings.

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Full text: content.pdf (693,574 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.


K Nakaniwa, N Yabuki, D Nishi, K Mitani, M Matsumoto

Development and Applications of a Total Station with a Built-in Crack Scale

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Full text: content.pdf (316,339 bytes) (available to registered users only)

Series: w78:2014 (browse)
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Karhu V

A model based approach for construction process modelling

Abstract: Process modelling methods have been developed for describing different aspects of industrial and other processes. Each method, e.g. the widely used scheduling in project planning software, has a specific scope for which it has been designed. Used outside this scope the method may prove quite inadequate. The newer type of modelling method GEPM, generic process modelling method, has been developed. It has borrowed many features from other modelling methods such as scheduling, IDEF0, and the so-called simple flow method. The term simple flow method is a box-and-arrow method that have been used for construction process descriptions in several companies in different variations.The GEPM method is flexible in a sense that the conceptual model, which has been defined using the EXPRESS modelling language, can be changed in order to achieve specialised additional features when needed. The database implementation supports this approach as well. GEPM enables the users to interact with the developed process models through views. The chosen views are scheduling, IDEF0, and simple flow view. The implementation of GEPM in a database and the data exchange with other software tools has proven useful. The view analogy can be compared with advanced CAD tools, where users interact with the designs through design drawings in different scale. GEPM can be used for describing partly company specific quality systems with reference models. The reference models can be converted into project specific models, which in turn are scheduled.

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Full text: content.pdf (254,511 bytes) (available to registered users only)

Series: w78:2001 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.man-software (0.026283) class.synthesis (0.018116) class.processing (0.016651)
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Permission to reproduce these documents have been graciously provided by CSIR Building and Construction Technology. The assistance of the editors, Mr. Gustav Coetzee and Mr. Frances Boshoff, is gratefully appreciated.


Khait A,Noskov A,Alekhin V,Antipin A

Numerical simulation and visualization of air flow in ranque-hilsch vortex tube

Abstract: Visualization of air flow which appears in Ranque-Hilsch vortex tube is performed by numerical simulations using different turbulence models. The following turbulence models have been used during computations: k-?, k-? Realizable, k-? RNG, SST and SAS-SST. It was found out that only SAS-SST turbulence model can predict the existence of large-scale secondary vortex structures within the computational domain. The existence of large-scale secondary vortex structures is confirmed by different experimental studies.

Keywords: Ranque-Hilsch effect,vortex tube,computational fluid dynamics,CFD,flow visualization

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Full text: content.pdf (1,280,986 bytes) (available to registered users only)

Series: convr:2013 (browse)
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Leiringer R T

Modelling the complexity of modern construction projects

Abstract: "The search for significant cost savings and quality improvements on construction projects is a routine activity and one where there is plenty of theory, but few results capable of being reproduced elsewhere. One reason is that the organisational infrastructure of a project is not always properly understood and defined, meaning that novel ways of bringing about such savings and improvements can be frustrated by invalid or erroneous assumptions. A case study of a large housing project, as part of a top level investigation by a government department, has shown how even domestic scale construction is not without problems in understanding the complexity of the process. The investigation is documented as a set of computer-based process models for the entire project, which have then been used to pinpoint failures in communication and information management. Of particular interest are the early, pre-design stages (briefing) and the supply chain covering the off-site design, fabrication and assembly of components. The findings show that large parts of the process are not adequately defined. The parties have difficulty in agreeing upon the amount and specifics of the activities that have and are taking place, as well as the resources and information that are necessary for the project’s successful completion. Conclusions are drawn that outline the need for clear and transparent guidelines and procedures."

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Full text: content.pdf (222,193 bytes) (available to registered users only)

Series: w78:2000 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.economic (0.044918) class.processing (0.016621) class.impact (0.012253)
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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


Li Y, Wang S Q

A framework for evaluating it benefits in construction companies

Abstract: Information Technology (IT) is seen as an enabling mechanism to allow radical change to be effected in construction industry. However, firms in the construction industry are slowly responding and adapting to developments in information and communication technologies (Love, et al., 2000). A key barrier to the more effective exploitation and application of IT in the construction sector has been the lack of investment on a scale comparable with other sectors. A primary reason cited for the low level of investment is the low level of perceived benefits from IT investments amongst construction business managers (Andresen, et al., 2000). Based on literature review and a survey in the local construction companies, this paper presents a “5Cs” evaluation framework to assist construction companies to predict, measure and evaluate the potential benefits that can or should be achieved by the introduction of IT. The proposed framework answers questions concerning about all factors that need to be considered in the evaluation, such as why, what, when, who and how to perform the evaluation. It is not only presented as a research result but also can be used as a guideline in practice.

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Full text: content.pdf (248,235 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.


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