Browsing by Author "Secord, James, M."
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Item Development of the automatic data management and the analysis of integrated deformation measurementsSecord, James, M.The monitoring of deformations and the analysis of deformation measurements have recently evolved to the limit that technology can provide. Traditionally, geotechnical measurements have been perform and analysed separately from geodetic surveys (angles, distances, and high differences). It is now possible to deal with them together in an integrated analysis, largely due to the University of New Brunswick (UNB) Generalized Method for the analysis of deformation measurements. Current microcomputer technology allows for the collection and on-site analysis of measurements. The automation, or computer control, of data collection, processing, and analysis has decided advantages over manual methods, particularly concerning data integrity and the handling of large volumes of repeated measurements. A system, “DAMADA”, for the management of data for deformation analysis, from the time of sensing to the depiction of the deformation, was developed to facilitate the implementation of integrated analyses using the UNB Generalized Method. In doing so, it makes the collection, processing and analysis of both geotechnical and geodetic data as automated as would be practical. DAMADA has been successfully applied at a hydro-electric power generating station. The experiences of that application have led to several conclusions. The testing and calibration of instrumentation can improve the reliability and fidelity of the data, especially over long term repeated use in monitoring. DAMADA automatically accounts for routine testing and calibration as an integral part of the observation regimen. Three dimensional coordination of all observation points, geotechnical as well as geodetic, can facilitate the trend analysis, modelling, and depiction of the deformation of a structure. DAMADA can run on a modest microcomputer (80287) under DOS and is limited only by the storage capacity of the computer’s hard drive. Although it currently considers horizontal and vertical geodetic observations separately, DAMADA is flexible enough that it could accommodate the simultaneous three dimensional monitoring of a structure.Item Development of the automatic data management and the analysis of integrated deformation measurementsSecord, James, M.The monitoring of deformations and the analysis of deformation measurements have recently evolved to the limit that technology can provide. Traditionally, geotechnical measurements have been perform and analysed separately from geodetic surveys (angles, distances, and high differences). It is now possible to deal with them together in an integrated analysis, largely due to the University of New Brunswick (UNB) Generalized Method for the analysis of deformation measurements. Current microcomputer technology allows for the collection and on-site analysis of measurements. The automation, or computer control, of data collection, processing, and analysis has decided advantages over manual methods, particularly concerning data integrity and the handling of large volumes of repeated measurements. A system, “DAMADA”, for the management of data for deformation analysis, from the time of sensing to the depiction of the deformation, was developed to facilitate the implementation of integrated analyses using the UNB Generalized Method. In doing so, it makes the collection, processing and analysis of both geotechnical and geodetic data as automated as would be practical. DAMADA has been successfully applied at a hydro-electric power generating station. The experiences of that application have led to several conclusions. The testing and calibration of instrumentation can improve the reliability and fidelity of the data, especially over long term repeated use in monitoring. DAMADA automatically accounts for routine testing and calibration as an integral part of the observation regimen. Three dimensional coordination of all observation points, geotechnical as well as geodetic, can facilitate the trend analysis, modelling, and depiction of the deformation of a structure. DAMADA can run on a modest microcomputer (80287) under DOS and is limited only by the storage capacity of the computer’s hard drive. Although it currently considers horizontal and vertical geodetic observations separately, DAMADA is flexible enough that it could accommodate the simultaneous three dimensional monitoring of a structure.Item Implementation of a generalized method for the analysis of deformation surveysSecord, James, M.Over the past three years, a generalized method for analyzing deformation surveys has been developed at the University of New Brunswick. A number of papers and a Ph. D. thesis have presented a rigorous and unified method which has successfully achieved the ability to apply the same computational procedure to any type of deformation; to be applied to one, two, or three dimensional data with spatial and temporal parameters; to utilize any type of data simultaneously; to be applied to any configuration, even when incomplete or defective; and to allow the use of any type of minimal constraints. The method of analysis follows several steps, from assessing the quality of the observations, through the pursuit of trend and the devising of possible models, to the estimation of model parameters with assessment of the model, its parameters and the choice of the “best” model and its depiction. Dealing with the implementation of the generalized method, this thesis provides detailed discussion on the inclusion of a variety of non-geodetic observables, on trend analysis, on model selection, and on model parameter estimation using a number of campaigns simultaneously. In doing so, two main examples are given. One is a reference triangulation network which is isolated with several of the reference stations being unstable. The other is a relative trilateration network for monitoring tectonic movement in California, with 12 years of at least annual campaigns and varying configuration. This method has been found to be flexible and adaptable to an assortment of applications and truly generalized.Item Implementation of a generalized method for the analysis of deformation surveysSecord, James, M.Over the past three years, a generalized method for analyzing deformation surveys has been developed at the University of New Brunswick. A number of papers and a Ph. D. thesis have presented a rigorous and unified method which has successfully achieved the ability to apply the same computational procedure to any type of deformation; to be applied to one, two, or three dimensional data with spatial and temporal parameters; to utilize any type of data simultaneously; to be applied to any configuration, even when incomplete or defective; and to allow the use of any type of minimal constraints. The method of analysis follows several steps, from assessing the quality of the observations, through the pursuit of trend and the devising of possible models, to the estimation of model parameters with assessment of the model, its parameters and the choice of the “best” model and its depiction. Dealing with the implementation of the generalized method, this thesis provides detailed discussion on the inclusion of a variety of non-geodetic observables, on trend analysis, on model selection, and on model parameter estimation using a number of campaigns simultaneously. In doing so, two main examples are given. One is a reference triangulation network which is isolated with several of the reference stations being unstable. The other is a relative trilateration network for monitoring tectonic movement in California, with 12 years of at least annual campaigns and varying configuration. This method has been found to be flexible and adaptable to an assortment of applications and truly generalized.