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KU Gökçe, RJ Scherer & HA Dikbaº

Web-based integrated construction management solution

Abstract: Construction projects are becoming more and more sophisticated, as a result of increased client requirements, tighter budget and time frames, larger number of participants and more complex work processes. However, especially in the area of construction project management (CPM) these growing requirements are not yet sufficiently addressed by today's IT. Even though several systems integrating CAD, ERP and CPM tools have been developed and brought to market over the last years, there is still lack of efficient data and process interoperability for the purposes of CPM. Also, solutions are mostly proprietary, taking little account of established standards for the improvement of the quality of the product and the management processes. In this paper we analyse CPM processes in terms of the needed applications and on the basis of generalised industry requirements. We describe the construction management life cycle model and suggest an IT framework for an integrated CPM system that can bring together design, ERP and CPM tools on the basis of standardised shared data (IFC) and standardised quality management procedures (ISO 9001). Reported is work that started at the Istanbul Technical University on more practical terms and is now continued, generalised and expanded at the TU Dresden in the frames of a PhD study.

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


Lavrencic,Darko

THE INTRACRANIOVERTEBRAL VOLUMES, THE CEREBROSPINAL FLUID FLOW AND THE CEREBROSPINAL FLUID PRESSURE, THEIR HOMEOSTASIS AND ITS PHYSICAL REGULATION

Abstract: Preface. After publication of the presented hypothesis some predictions were verified independently by other authors: (1) Monro-Kellie "four compartments" doctrine, (2) relation between CSF formation and CSF removal in physiological phase as presented with illustrative curves, (3) hypovolemia during intracranial hypotension syndrome, (4) increased CSF proteins in decreased CSF flow and (5) influence of neuro-vegetative system on CSF pressure. The predictions not yet verified: (1) turning points B-low and B-high that represent physiological borders, (2) pathophysiological self-sustaining phases of low and high CSF pressure with corresponding minimal or maximal CSF volume (maximal dural sac collapse or distension) and no CSF transport, (3) compensated and de-compensated conditions. None of the predictions were disproved yet. The purpose of this presentation on the INTERNET is to promote further discussions about unverified predictions and to encourage clinical research and experimenting in this direction. Summary. Physiological and pathophysiological processes in the intracraniovertebral space are specific because of its rigid and constant volume (Monro-Kellie doctrine). The hypothesis presents how the homeostasis of the intracraniovertebral compartments' volumes, cerebrospinal fluid (CSF) flow and CSF pressure is physically regulated. The hypothesis takes into account the quantitative and qualitative relations regulating CSF formation and CSF removal on which the homeostasis is based.

Keywords: cerebrospinal,fluid,intracranial,hydrodynamics,formation,production,reabsorption,pressure,hypothesis,flow,homeostasis,physical,CSF,hypotension,hypertension,circulation,dural,sac,sinuses,venous,sinuses,extradural,epidural,chorioideus,plexus,hypovolemia,hydrocephalus,subarachnoidal,space,ventricles,arachnoidal, villi,granulations,cribriform,plate,canalis,centralis

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Full text: content.lavrenč (696,205 bytes) (available to registered users only)

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Liang Y L, Amette L S, Simon S K

Multimedia project control and documentation system

Abstract: Construction experience and knowledge are omnipresent yet difficult to capture at the project site. Many problems and innovative solutions can not be effectively documented because ofthe lack of proper tools to collect and organize the as-built iformation. In claims or disputes, mmy issues involving site conditions cannot be thoroughly analyzed because ofthe lack of information. This as-built information may exist in diverse formats such as text (reports, daily logs), sound (meeting recordings, discussions), and video (site walk through, inspection records). Using multimedia technology, these diverse formats of as-built information can be integrated with project scheduling and control systems to provide an environment not only to control and document project information but also to elicit and study construction experience and knowledge. Such information could also be very valuable for facility operator/maintainers in the later stage of the facility life cycle. This paper presents the design and the operatian of a multimedia project control and documentation system (M73LTROL) under development at the University of Illinois and Construction Engineering and Research Laboratory (CERL). This system allows the users to document and retrieve the as-built project information in the form of text, sound, image and video associated with construction activities. The current version of MULTROL is developed for the FC platform and runs under 'Microsoft WindowsTM operating environment. This system uses graphical user-interface for all operations, creating a user- friendly environment far construction personnel. The retrieval of the as-built information is further assisted by user definable queries to support different needs of construction management.

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Full text: content.pdf (1,897,657 bytes) (available to registered users only)

Series: w78:1993 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.man-software (0.041560) class.retrieve (0.016578) class.environment (0.015832)
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Permission to reproduce these papers has been graciously provided by the National University of Singapore. The assistance of the editors, particularly Prof. Martin Betts, is gratefully appreciated.


Lyne D-S

Development of virtual reality applications for the construction industry using the Oculus Rift head mounted display

Abstract: 3D visuals are a fundamental part of virtual reality that we often take for granted. Yet when we simulate 3D we often neglect to accurately reproduce the basic concept of depth perception. This document discusses possible applications for stereoscopic head mounted displays within the context of the construction industry and seeks to highlight the technical considerations of using such technologies.

Keywords: Oculus Rift,Construction,Simulation,Stereoscopic,3D,Head Mounted Display,Virtual Reality

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Series: convr:2013 (browse)
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M. Weise, T. Liebich, J. Tulke & P. Bonsma

IFC Support for Model-based Scheduling

Abstract: Model-based scheduling is about linking information from three yet separated domains; (1) architectural design, (2) construction scheduling and (3) cost management & quantity take-off. It thus will benefit from the Building Information Modeling (BIM) approach followed by the international buildingSMART initiative and its product the IFC data model specification. On the basis of a novel rule-based linking approach, which is shortly explained in the beginning, the paper provides an overview of the work that has been done to apply the linking approach in conjunction with the IFC 2x3 release and available IFC-enabled design applications. The paper gives insights into the capabilities but also the gaps of IFC. However, the paper is not going into technical details, which are provided in a separate, freely available discussion paper. Instead it shows the way from the requirements definitions, to the gap analysis, suggested extensions and prototype implementations, namely the Scheduling Assistant and the IFC-interface plug-in for MS Project. It finally discusses the current status of our developments and gives an outlook for further developments within the European Research and Development project InPro, an Integrated Project under the 6th framework program that has supported this work.

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Series: w78:2009 (browse)
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Markus Schorr, Andre Borrmann, Cornelia Klaubert, Yang Ji, Willibald Gunthner, Ernst Rank

A Product Lifecycle Management Approach for Civil Engineering Projects

Abstract: Product Lifecycle Management (PLM) is a strategic concept to develop, manage and keep control of industrial products over their entire lifecycle. The concept comprises IT-systems as well as methods, business processes and organizational structures (Arnold, 2005). The most essential component for a PLM implementation is product data management (PDM) systems that administrate all the data from initial ideas, drafts and drawings to information on the manufacture and maintenance on a central storage platform (Stark, 2005). Compared to document management systems, PDM systems provide part-oriented functions required for linking components, corresponding 3D models and drawings as well as any other related documents in a clearly arranged pattern. In addition, they also provide a convenient means of transferring and incorporating data from CAD-systems into the central storage platform. Combined with cleverly devised access rights management and an integrated workflow engine, PDM systems appear to be a good information management solution in civil engineering projects.Since those systems are designed to serve in-house information management procedures in the mechanical engineering industry, however, they have not been used for civil engineering projects so far (Borrmann, 2009). This is due to the fact that special requirements needed in construction projects have not been fulfilled yet. This paper describes both the concept and the implementation of a PDM system customized to manage data arising in civil engineering projects. As well as discussing specific requirements, it also introduces the implementation of necessary adjustments and several add-ons are presented. Thus the paper shows how an adapted PDM system originally developed for the mechanical engineering industry enables a company-wide component-oriented management of all relevant data over the entire lifecycle of a building. Beyond that, today’s inadequacies and missing features for using PDM systems in civil engineering projects are described.

Keywords: Building Lifecycle Management, Product Data Management, Document Management, Data Acquisition and Storage, Information and Knowledge Management

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Full text: content.pdf (332,442 bytes) (available to registered users only)

Series: w78:2010 (browse)
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Mattias Jacobsson, Henrik CJ Linderoth

User Perceptions of ICT in a Major Swedish Building and Construction Company

Abstract: The use of information and communication technologies (ICT) in building and construction companies has steadily been growing during the last decade. In the Scandinavian context 100 % of all employees work at workplaces with computers and 70 % of them, including site workers, have their own computer, their own e-mail address and access to the Internet at their workplace (Samuelsson 2008). Moreover is the use of applications like project webs and electronic trade widespread in the construction industry (ibid). However, despite the rapid diffusion of ICT in the industry, are there not yet many studies inquiring perceptions of the ICT actually being used. Accordingly is the objective of the paper to explore and analyze perceptions of ICT used in a major Swedish building and construction company. Data was collected by a web-based survey in two regional units of the company. 292 completed surveys were returned that corresponds to a response rate of 49 %. The data was analysed by a various set of statistical methods like T-test, bi-variate analysis, linear regression and factor analysis.It can be concluded that respondents are generally fairly satisfied with their ICT and it is perceived as necessity for the fulfilment of work tasks and a valuable support in various areas of decision making. There are, however, some significant differences in perceptions of the outcomes of ICT-usage among professional groups. Moreover, perceptions of a single system were positive correlated with the frequency of use of the system and perceptions of ICT in general could be categorized into three main categories.ReferencesSamuelsson, O. (2008) The IT-barometer – A decade’s development of IT-use in the Swedish construction sector. ITcon Vol. 13, pg. 1-19, http://www.itcon.org/2008/1.

Keywords: Perceived usefulness, post-adoption, surveys, IS-success, construction companies

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McMeel D,Amor R

Ecosystem information models: visualizing complex data to support collaborative decision making

Abstract: There is considerable interest in ‘open data’ with many administrations launching, or involved in, programmes to make government data open and available. From geographical information systems (GIS) to infrastructure data and building information models (BIMs), it is believed that access to this data will contribute to productivity and efficiency gains. Yet there remains uncertainty surrounding how stakeholders involved in design, construction and maintenance of the built environment might benefit from this unlocked information. We begin this paper by looking at a specific government initiative providing access to built environment datasets - we investigate and compare the different approaches for accessing this information-base. With speculation that open access will lead to huge benefits in productivity, particularly through interoperability, the second part of our paper implements a system to explore the federation of this data and the results of its interoperation in a collaborative visual environment. While prediction models continue to be problematic when simulating multiple complex and interdependent factors of the built environment concurrently, here we appropriate data and exploit it within decision-support systems. A Systems that provides a qualitative virtual 3D rendering of what is otherwise prosaic or opaque technical information, providing the potential to federate, align and compare otherwise disparate sources of data. Arguably access to open data has not revolutionized consumer computing, but it has played an important part in combination with the emergence of other technologies such as mobile devices, Wi-Fi and location aware computing. Here we critique ‘open data’ initiatives for design and construction, and ask what part they might play—in combination with other technologies—to help deliver on the promise of productivity.

Keywords: Design,Digital Media,Interoperability,Data,Ecosystem

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Series: convr:2013 (browse)
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Miles J, Foley A, Moore L

Metaphors and cost significance in a conceptual design decision support system

Abstract: "Currently in the research community, there are a number of styles of conceptual design software being developed. This paper describes the development of a Decision Support System (DSS) which belongs to that class of systems where the search is undertaken by the user with the software providing information and answers. Industrial evaluation by the authors and others has shown that such a style of interaction is well received by practising designers provided that the algorithms and processes used are sufficiently transparent for them to understand and have confidence in the way that the system reaches derives its answers. The system which forms the subject of this paper fully conforms to the above, with all algorithms, constraints and rules being easily accessible to the user. The system is known by the acronym COSTEST. COSTEST provides facilities for the designer to undertake the conceptual design of beam / slab bridges to a far higher level of accuracy than is possible with current practice. It includes facilities for sizing the super and sub-structures as well as FE analysis, a cost estimation routine, a database of structural sizes and material properties and the ability to produce a simple general arrangement and a client report. To enable the user to navigate through the system, understand what facilities are available and what their significance is, the user interface has been structured using the metaphor of the design office. The interface is arranged as a corridor off which are facilities such as a superstructure design office, an estimator’s office, etc. These are arranged around a direct manipulation representation of the sectional general arrangement. It is postulated that such an arrangement reduces the distance between the user’s way of thinking about the design problem and the system’s representation, thus making the system easier to use. Such Visual Interactive Modelling of the domain has been shown to allow users to use the software to learn about their own subjective values while dealing with the technical issues. The cost estimation component of COSTEST is based on the concept that for any bridge 80% of the total cost is contained in the 20% of items that are most cost significant. This idea has been developed by Horner but further analysis of existing bridges was undertaken as part of this work. The result is a simple cost model which is easy to use and yet far more accurate than current conceptual design practice. In particular it allows an accurate comparison to be made between options. COSTEST has been developed in conjunction with a number of practising bridge designers and the final system has been evaluated both by these people and other independent designers. The results of the evaluation are generally positive."

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Full text: content.pdf (276,555 bytes) (available to registered users only)

Series: w78:2000 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.man-software (0.056510) class.bestPractise (0.043429) class.economic (0.015023)
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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


Moloney J, Amor R, Furness J, Moores B

Design critique inside a multi-player game engine

Abstract: The design critique process, used to provide expert feedback on a building design concept to students in architecture schools throughout the world, is reinterpreted within the context of an ITbased collaborative virtual environment. IT support for design critique allows new modes of participation where the experts do not have to be co-located to carry out their tasks and, through the ability to record criticisms, can join, or leave, a critique session as their time pressures allow. Students can guide tours through their virtual designs, yet those making the critique still have the ability to explore other aspects of the design which intrigue or concern them. Commentary and annotation on the design is attached to various aspects and views within the model and dialogues between the student designer and those making the critique can be built up over time. The resulting discussions recorded against the design can then be used for future reference by the student or as instructive commentary for newer students reviewing previous design approaches. A game engine provides the real-time 3D visualisation, base interactivity and multi-participant support upon which critique specific functionality has been incorporated.

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Full text: content.pdf (1,517,764 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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