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A A Akanmu, C J Anumba

Experimental Investigation of Chirp Spread Spectrum-Based Swarm Sensors for Construction Resource Tracking

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Series: w78:2014 (browse)
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A Guerriero, S Kubicki, L Schwartz

Design and assessment of prospective mobile services for construction

Abstract: Mobile applications become more and more used in both private and professional activities.Innovation through mobile services specification and prototyping becomes a major trend inconstruction sector research. The project presented in this paper aims both at demonstrating theinterest of mobile technologies for assisting building construction coordination and to elicitate themost interesting and common requirements of construction practitioners for this type of application.Then the paper focuses on the method used for specifying basic requirements and the experimentalprotocol setup for assessing the developed prototype. The main outputs are a set of specifications and aprototype of mobile application as well as a method for defining experimental protocols in a context ofservice-based innovation. The prospects envisage considering context-aware mechanisms for therecommendation of mobile services to construction practitioners.

Keywords: Construction management, Mobile computing, Mobile service prototyping, Experiment protocol.

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Full text: content.pdf (4,608,195 bytes) (available to registered users only)

Series: w78:2011 (browse)
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A Magdic & D Rebolj

Human oriented mobile system for on-site problem solving

Abstract: Uncertainties and the dynamic nature of on-site activities require complex coordination of information, resources and tasks. Problems caused by unanticipated events must be solved concurrently and should avoid project delays and costs increasing. For effective solving of such problems, the immediate availability of information and a prompt response of project participants on various levels of project organization are crucial. A combination of both conditions facilitate the optimum decision-making in cases of unanticipated events. Based on experiences from a series of experimental projects called E-site, it is our strong belief that a large amount of potentials for on-site problem solving lies in the knowledge, experience and capability of the site staff themself. Therefore, there is also a need to effectively link together the rich knowledge and experience of site staff and include site staff into problem solving processes. This paper describes a human oriented on-site problem solving system supported with context-aware communication to help dealing with unanticipated events on construction sites.

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Full text: content.pdf (229,036 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.


A. Guerriero, L. Johannsen & S. Kubicki

Designing IT services for the Construction Industry. Lessons learnt for Selection of Validation Techniques

Abstract: Setting up collaborative working practices is a major stake in construction projects because each project is specific in terms of actors involved, documents produced and building elements designed. In such contexts the use of IT groupware tools to improve collaboration and their efficient appropriation by AEC practitioners is really a challenge. Designing such innovative collaboration-support services is an issue largely addressed in the scientific community especially to identify the factors of success/failure of the tools, but also to identify the scientific experimental approaches underlying it. This article describes five case studies of cooperation-support IT developments and for each of them the validation techniques used. It suggests an analytic framework distinguishing between 1) research project aims, 2) working practices and 3) IT developments types. Finally it introduces three experimental levels to be achieved in various research projects types and describes their related experimental properties.

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Full text: content.pdf (274,910 bytes) (available to registered users only)

Series: w78:2009 (browse)
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Amirante I

Information technology teaching at the University: an experience at the Faculty of Architecture in Naples

Abstract: The experiences illustrated here refer to didactic activity carried out at the Faculty of Architecture of the University of Naples; in particular these concentrate on the technological aspects of the teaching of architecture. We can consider the evolution of the architect from individual operator to manager of the multi-disciplinary aspects of the building process (building process manager) as a reality in today's Italy. The Support Systems of Information Technology (ITSS), can be of great importance €or this professional figure, and for this reason it is important to include him/her in the teaching process. I personally have involved fourth and fifth year and last-year undergraduate students in the following subjects at the experimental stage: degradation diagnosis supported by m Expert System in courses of the Technology of Building Rehabilitation; co-ordinated System of tests in degradation of existing buildings; the use of three-dimensional programmes to survey and visualize rhe territory; rapid analysis of degradation in the maintenance of urban facades. * In these and other similar works I'TSS has played a significant part for a global synthesis in students' methodological approaches, being an inttoduc tion to new Information Technology potentialities.

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Full text: content.pdf (1,158,179 bytes) (available to registered users only)

Series: w78:1993 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.education (0.036539) class.analysis (0.018067) class.synthesis (0.015849)
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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.


Bedard C

The validation of integrated CAD in building engineering design

Abstract: The need and the urgency to develop integrated CAD software for building design are well established in industry and academia alike. The means and the approach to achieve this objective are however not soclear and do not meet with general agreement. Even the final product itself - integrated CAD - has different meanings for different people.Like other research groups in building studies, we have developed a number of integrated building design systems in the last few years thateffectively combine different activities and types of expertise in a unified approach. For these successful research initiatives, the fundamental issue of validation remains a very difficult one to answer properly. On the one hand, reference cases do not exist to benchmark the operation of an integrated system, as in the case of experimental or empirical processes. On the other hand, no clear guidelines have emergedyet from commercial software developers in the construction industry that claim to have achieved 'integrated CAD' as soon as some form of file transfer exists between an application software and a CAD package.From the study of some integrated CAD systems for building design recently developed in industry and at the CBS, this paper will attempt tocircumscribe the main aspects of the validation issue, e.g. what are the characteristics of integrated CAD ? what kind of performance is expected from such systems ? are current systems delivering what building design practitioners need ?

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Full text: content.pdf (426,635 bytes) (available to registered users only)

Series: w78:1992 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.bestPractise (0.020523) class.education (0.013759) class.synthesis (0.011254)
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Permission to reproduce these papers has been graciously provided by Research Press of the National Research Council of Canada. The support of the editor, Dr. Dana Vanier, is gratefully appreciated.


C Gouy-Pailler, H Najmeddine, A Mouraud, F Suard, C Spitz, A Jay, P Maréchal

DISTANCE AND SIMILARITY MEASURES FOR SENSORSSELECTION IN HEAVILY INSTRUMENTED BUILDINGS:APPLICATION TO THE INCAS PLATFORM

Abstract: Energy management in residential buildings is taking an increasing role in the construction workflows.It entails understanding thermal processes at stake in the buildings and quantifying energyconsumption, which meets inhabitants comfort requirements. Experimental platforms such as INCASaim at providing experts with a practical way to study such problems in real conditions. These heavilyequipped buildings yield huge amounts of real-time data (sampling rates, number and types of sensors)for which new automatic approaches could be useful to thermal experts. Generic similarity measuresfrom data-mining could therefore provide comprehensive analysis tools to thermal experts. This paper focuses on the ability of some distance and similarity measures to organize millions ofdata from homogeneous and heterogeneous sensors into coherent clusters. Simplifying datainterpretations to thermal experts in highly equipped buildings, this approach could also stand as abasis for studying smart grids of less equipped domestic houses studies. Two types of similarity measures are explored. The first one consists of a set of three distances,and accounts for differences in terms of amplitude scaling and shifting between pairs ofmeasurements. It relies on the comparison of homogeneous sensors by quantifying the relativeproximity of their amplitude in terms of mean value, variance and time shift. The second type ofsimilarity measure employs a pre-processing step transforming continuous signals into binary events.The resulting spike trains are then compared by quantifying the amount of unitary transformations(events moves or events deletions/additions) needed to align pairs of events sequences. These proximity measures are computed on real data from experimental buildings of the INCASplatform. It comprises three experimental buildings (with different construction types) dedicated totesting various approaches regarding systems, control and energy-saving policies. These geometricallyidentical buildings are equipped with hundreds of sensors measuring temperature, humidity,differential pressure, and others data at various positions of the structures with sampling rates of onemeasurement per minute. Simulation-based temperatures are integrated in the sensors set providing acomparison between real and simulated data. Results illustrate the contribution of the applied methods when dealing with large amounts ofmeasurements related to instrumented buildings behaviors. Actually results show that coherent clustersregarding distinct signal properties are automatically generated. These clusters can be used fordimensionality reduction (clusters of sensors could be summarized by a single virtual measurement),or relative comparisons between sensors or between real and simulated datasets.

Keywords: INCAS, low-energy consumption, sensor selection, multivariate data mining

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Full text: content.pdf (803,535 bytes) (available to registered users only)

Series: w78:2011 (browse)
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Costin A,Shaak A,Teizer J,Pfeffer G,Khanzode A,Saripally D,Chao O,Schoner B,Shah S

Passive RFID-based asset tracking and project management on a large hospital project

Abstract: As construction job sites get larger and more complex, the need to increase building protocol control and safety is becoming more necessary. Having a real-time tracking system for materials, equipment and personnel of a job site will help project managers to enhance the safety, security, quality control, and worker logistics of a construction project. In this paper we will present the method of integrating Radio Frequency Identification (RFID) and Building Information Modeling (BIM) for real-time tracking of materials, equipment, and personnel. The purpose is to generate real-time data to monitor for safety, security, quality control, and worker logistics, and to produce leading indicators for safety and building protocol control. The concept of reference tags will be utilized along with a cloud server, mobile field devices, and software to assist the project managers with staying connected with the job site, from supply chain management to installation. Hardware components include RFID tags, portal RFID readers, fixed turn-style readers, and mobile handheld devices. The system was deployed on a 900 thousand square feet hospital project that consisted of three major buildings, 125 contractors, and 1,200 workers. Preliminary results show that the integration of these technologies enhances productivity, reduces scheduling issues, assists in subcontractor management, and provides real-time information on deployed crews and building activities. High-level metrics have been developed at the project and large contractor level. Additionally, the system also provided real-time information on local worker participation as part of the project goal. Based on experimental analysis, we demonstrate that the RFID and BIM system is a practical and resourceful tool to provide real-time information and location tracking to increase safety, security, and building protocol control.

Keywords: Asset tracking,Building information modeling (BIM),Building protocol,Cloud Server,Human resources,Passive radio frequency identification (RFID),Project management,Quality control,Safety,Security,Worker Logistics

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Series: convr:2013 (browse)
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D. Grau, C. H. Caldas, C.T. Haas, P.M. Goodrum & J. Gong

Leveraging Materials Tracking Technologies to Improve Industrial Project Performance

Abstract: The perception that the intertwinement between field materials management and advanced sensing technologies can highly benefit field operations has gained widespread acceptance among industry representatives. Indeed, past research efforts have demonstrated the feasibility of technology-based and automated approaches to handle materials. In spite of their success, material components are still manually handled. This lack of innovation is mostly a consequence of the undemonstrated cost effectiveness of these technology-enabled approaches. This study evaluates the impact of an automated tracking approach on project performance. For this purpose, a massive experiment was designed. In this experiment, the site tracking approach was taken as the baseline for comparison with an automated tracking approach, which was supported by localization and identification sensors. For each tracking method, field records associated with four hundred steel components were collected. The experimental results demonstrate that sensing technologies have a clear and positive impact on craft labor and installation processes.

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Series: w78:2009 (browse)
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Daigoro Isobe, Masashi Eguchi, Kensuke Imanishi and Zion Sasaki

Verification Of Blast Demolition Problems Using Numerical And Experimental Approaches

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Full text: content.pdf (1,407,222 bytes) (available to registered users only)

Series: w78:2006 (browse)
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