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Charalambos Kyriakou and Symeon E. Christodoulou

Detecting Pavement Patches Utilizing Smartphones Technology and Vehicles

Abstract: Presented herein is a study on the utilization of low-cost technology for detection of roadway pavement anomalies (patches and potholes), by use of sensors on smartphones and of automobilesÕ on-board diagnostic (OBD-II) devices for the collection and analysis of vibration-related data while vehicles are in movement. The mobile data collection kit consists of a triaxial accelerometer, a gyroscope and a global positioning sensor. The smartphone-based data collection is complimented with robust regression analysis and a bagged-trees classification model for the classification of pavement anomalies. The proposed system is readily available, low-cost and adequately accurate, and can be utilized in crowd-sourced applications for pavement monitoring. Further, the proposed methodology has been field-tested, exhibiting detection accuracy levels higher than 90% for pavement patches, and it is currently expanded to include larger datasets and a bigger number of pavement defect types.

Keywords: Pavement Anomalies, Detection and Classification, Smartphones Technology, Robust Regression, Bagged Trees

DOI: https://doi.org/10.24928/JC3-2017/0109

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Chassin D P

Computer software architecture to support automated building diagnostics

Abstract: Developed by Pacific Northwest National Laboratory's Building Sciences Group, Honeywell Technology Center, and the University of Colorado Joint Center for Energy Management with support from the U.S. Department of Energy, the Whole Building Diagnostician is a Windows-based application that provides building operators with easy access to system diagnostic information. The architecture of the software infrastructure presented provides essential data collection, validation, integration, analysis, and management functions for the large sets of discontinuous asynchronous time-series data used by all the modules in the application. The proposed architecture uses a central database to store both the data and the diagnostic results from the various modules. Although the use of a centralized database has many advantages, it has several shortcomings. This paper will discuss the advantages and shortcomings of such an approach when deployed on a large scale.

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Full text: content.pdf (413,036 bytes) (available to registered users only)

Series: w78:1999 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.man-software (0.033279) class.impact (0.013789) class.software development (0.011533)
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Permission to reproduce these papers has been graciously provided by the Research Press of the National Research Council of Canada. The support of the editors, particularly Dr. Dana Vanier, is gratefully appreciated.


Manjula Dissanayake and Aminah Robinson Fayek

Issues And Challenges Of Construction Performance Diagnostic Modeling

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Full text: content.pdf (683,567 bytes) (available to registered users only)

Series: w78:2006 (browse)
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Moodi F

Integration of knowledge management and Information Technology into the repair of concrete structures: an innovative approach

Abstract: The use of Information Technology (IT) in design and construction can exploit strategic opportunities for new ways of integrating, sharing and facilitating information and knowledge in any field of engineering. The technologies available are sophisticated computer programs which store expert knowledge on specific subject and are applied to a broad range of engineering problems. The integration of separate areas of IT can be used to bring a group of experts and specialists in any field of engineering closer together by allowing them to communicate and exchange information and expertise. The research described in this paper is based upon a total management system for repair of concrete structures with sufficient flexibility to allow an inexperienced user to develop his interest in concrete repair technology whilst at the same time allowing an expert to contribute knowledge towards improving and evolving problem solving capability in the field of concrete repair. This computerised management system, which is called DEMAREC, comprises a knowledge expert system (DEMAREC-EXPERT) and a database management system (REPCON) alongside visualization technologies and an evaluation system (ECON). It is developed to produce an innovative platform which will facilitate and encourage the development of knowledge in education, evolution, evaluation and diagnostic modes of concrete repair. The methodology is developed to provide technology transfer of information and expertise from the research community in the repair of concrete structures to other practitioners and vice versa, and to allow the promotion and relegation of knowledge according to the opinion of users of different levels of ability from expert to novice.

Keywords: information Technology (IT), concrete repair, knowledge management system

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Full text: content.pdf (2,164,625 bytes) (available to registered users only)

Series: itaec:2004 (browse)
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Mottonen V, Pakanen J

On-line fault diagnosis using internet and www pages

Abstract: The Internet or lntranet provides a useful media for diagnostic applications of HVAC systems. Compared to a written service manual, WWW representation offers a versatile tool for deliver- ing relevant diagnostic information to servicemen and customers. It makes it possible to change, correct and update diagnostic information and immediately send it to all users. Web pages can be linked to real diagnostic back-end programs running in a server computer. Such an extension creates interactive communication between the customer and the server that dif- fers from a classic clientlserver model. This paper presents necessary techniques and appro- priate tools for creating on-line interactive diagnostic applications on the Web. The technique is demonstrated in the fault diagnosis of an oil burner.

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

Series: ecce:1997 (browse)
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Pakanen J E, Möttönen V J, Hyytinen M J, Ruonansuu H A, Törmäkangas K K

A Web-Based Information System For Diagnosing, Servicing And Operating Heating Systems

Abstract: Diagnosing a heating system may turn out to be necessary even for an ordinary customer, like a residential building owner or a facility manager. The need is usually triggered by a technical problem in the system. The customer wants to know how to solve or handle the problem. This paper presents a Web-based information system, called WebDia, which is designed to assist customers with such heating problems. WebDia is a prototype system, constructed for district heating substations and oil heating systems. WebDia incorporates a Web server integrated with a back-end database, accessible from a browser of a PC, a Personal Digital Assistant (PDA) or a Wireless Application Protocol (WAP) mobile phone. The general idea behind the development is that the server computer shares its resources and knowledge with the user. Besides fault diagnosis, instructions for servicing and operating the heating system are also essential topics. The information content is gathered from various publications, material provided by manufacturers and interviews with experts. A great deal of the professional information also comes from the fourteen co-operating companies assisting in the system development. WebDia is a collection of dynamic HyperText Markup Language (HTML) pages, but it also includes pictures, photographs, video and audio recordings, and animations. Most of the pages are created using server-side scripting based on Active Server Pages (ASP) technology, but Java applets are also used. Building a system like WebDia turns out to be a tedious process, which requires knowledge and expertise from several disciplines in addition to modern Web authoring and multimedia tools.

Keywords: Web engineering, multimedia, database systems, WAP, PDA, diagnostic methods, heatin

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Full text: http://www.itcon.org/2001/4 (available to registered users only)

Series: itcon:2001 (browse)
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Pakanen J, Möttönen V, Hyytinen M

WebDia - a WWW-based tool for diagnosing, servicing and operating heatingsystems

Abstract: WebDia is a service manual, a help desk and a diagnostic tool on the Web. Technically, it consists of aWeb server and a PC or hand-held computer with an Internet connection, or a WAP mobile phone. Theidea is that the server computer shares its resources and knowledge with the user. Diagnostic decisionssuggested by the server are based on observations made by the user. WebDia is designed for ordinarycustomers, residential building owners, technical house managers and servicemen. The prototype system isconstructed for district heating substations and oil heating systems. Besides diagnosis, instructions forservicing and operating the plant are other essential topics. The Web-based user interface is flexible. Thepresented information is not only hypertext, but also pictures, photographs, video recordings, andanimations. So, the resulted information is comprehensive and easy to understand even for unskilledpersons.

Keywords: diagnostic methods, Web-based tools, help desk, user interface, district heating sub stations, oilheating systems, WAP, hand-held computers

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Full text: content.pdf (302,652 bytes) (available to registered users only)

Series: ecce:2001 (browse)
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Stuurstraat N

A design tool with integrated knowledgeand code checking for concrete beams

Abstract: Knowledge-based expert system technology has been applied most successfully todiagnosis problems. Expert systems have also been developed for fault detection,prediction, interpretation, monitoring and planning. Despite their useful applicability in theearly design stage of the structural design process there is a poor number of expert systemsdeveloped for the structural engineer. An expert system developed for structural design problems exhibits certain similarities todiagnostic expert systems. The results from the calculations have to be analysed anddepending on the diagnosis certain actions can be taken or advises can be given. Forsolving a design problem the expert system will first of all have the task of finding aninitial design configuration using heuristic knowledge based on rules of thumb and defaultvalues. Numeric algorithmic procedures are then applied to determine the performance ofthe design. The design process can therefore be thought of as being subdivided into adesign part and a diagnostic/analytic part. The problem of structural design can in generalbe characterised as a search for a solution amongst a large number of alternatives that allsatisfy the specified constraints.

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Full text: content.pdf (52,158 bytes) (available to registered users only)

Series: w78:1997 (browse)
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