Benjamin Steven Vien
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View article: Structural Health Monitoring of Anaerobic Lagoon Floating Covers Using UAV-Based LiDAR and Photogrammetry
Structural Health Monitoring of Anaerobic Lagoon Floating Covers Using UAV-Based LiDAR and Photogrammetry Open
There has been significant interest in deploying unmanned aerial vehicles (UAVs) for their ability to perform precise and rapid remote mapping and inspection of critical environmental assets for structural health monitoring. This case stud…
View article: Clustering-Based Thermography for Detecting Multiple Substances Under Large-Scale Floating Covers
Clustering-Based Thermography for Detecting Multiple Substances Under Large-Scale Floating Covers Open
This study presents a novel approach for monitoring waste substrate digestion under high-density polyethylene (HDPE) geomembranes in sewage treatment plants. The method integrates infrared thermal imaging with a clustering algorithm to pre…
View article: Advancing a Non-Contact Structural and Prognostic Health Assessment of Large Critical Structures
Advancing a Non-Contact Structural and Prognostic Health Assessment of Large Critical Structures Open
This paper presents an overview of integrating new research outcomes into the development of a structural health monitoring strategy for the floating cover at the Western Treatment Plant (WTP) in Melbourne, Australia. The size of this floa…
View article: Optimisation and Calibration of Bayesian Neural Network for Probabilistic Prediction of Biogas Performance in an Anaerobic Lagoon
Optimisation and Calibration of Bayesian Neural Network for Probabilistic Prediction of Biogas Performance in an Anaerobic Lagoon Open
This study aims to enhance diagnostic capabilities for optimising the performance of the anaerobic sewage treatment lagoon at Melbourne Water’s Western Treatment Plant (WTP) through a novel machine learning (ML)-based monitoring strategy. …
View article: Image Segmentation and Filtering of Anaerobic Lagoon Floating Cover in Digital Elevation Model and Orthomosaics Using Unsupervised k-Means Clustering for Scum Association Analysis
Image Segmentation and Filtering of Anaerobic Lagoon Floating Cover in Digital Elevation Model and Orthomosaics Using Unsupervised k-Means Clustering for Scum Association Analysis Open
In various engineering applications, remote sensing images such as digital elevation models (DEMs) and orthomosaics provide a convenient means of generating 3D representations of physical assets, enabling the discovery of new insights and …
View article: Corrections to “Structural Health Monitoring of Large Scale Geomembrane Floating Covers Using Solar Energy” [Jun 23 13611-13620]
Corrections to “Structural Health Monitoring of Large Scale Geomembrane Floating Covers Using Solar Energy” [Jun 23 13611-13620] Open
In the above article [1] , the contributions of coauthors for the article were not properly acknowledged nor listed. The content about the introduction of our industry partner was not explicitly detailed and our funding sponsors were not i…
View article: Modal Decomposition of Acoustic Emissions from Pencil-Lead Breaks in an Isotropic Thin Plate
Modal Decomposition of Acoustic Emissions from Pencil-Lead Breaks in an Isotropic Thin Plate Open
Acoustic emission (AE) testing and Lamb wave inspection techniques have been widely used in non-destructive testing and structural health monitoring. For thin plates, the AEs arising from structural defect development (e.g., fatigue crack …
View article: Acoustic Emission Source Characterisation during Fatigue Crack Growth in Al 2024-T3 Specimens
Acoustic Emission Source Characterisation during Fatigue Crack Growth in Al 2024-T3 Specimens Open
While acoustic emission (AE) testing can be used as a valuable technique in structural health monitoring and non-destructive testing, little research has been conducted to establish its sources, particularly in 2024-T3 aluminium alloys. Th…
View article: Non-Contact In-Plane Movement Estimation of Floating Covers Using Finite Element Formulation on Field-Scale DEM
Non-Contact In-Plane Movement Estimation of Floating Covers Using Finite Element Formulation on Field-Scale DEM Open
Unmanned aerial vehicle (UAV) assisted photogrammetry has been used to perform a non-contact measurement of the covers on the anaerobic wastewater lagoons at Melbourne Water Corporation’s Western Treatment Plant (WTP). These floating cover…
View article: Monitoring Osseointegration Process Using Vibration Analysis
Monitoring Osseointegration Process Using Vibration Analysis Open
Osseointegration implant has attracted significant attention as an alternative treatment for transfemoral amputees. It has been shown to improve patients’ sitting and walking comfort and control of the artificial limb, compared to the conv…
View article: Experimental Investigation of Vibration Analysis on Implant Stability for a Novel Implant Design
Experimental Investigation of Vibration Analysis on Implant Stability for a Novel Implant Design Open
Osseointegrated prostheses are widely used following transfemoral amputation. However, this technique requires sufficient implant stability before and during the rehabilitation period to mitigate the risk of implant breakage and loosening.…
View article: Modal Frequencies Associations with Musculoskeletal Components of Human Legs for Extracorporeal Bone Healing Assessment Based on a Vibration Analysis Approach
Modal Frequencies Associations with Musculoskeletal Components of Human Legs for Extracorporeal Bone Healing Assessment Based on a Vibration Analysis Approach Open
Reliable and quantitative assessments of bone quality and fracture healing prompt well-optimised patient healthcare management and earlier surgical intervention prior to complications of nonunion and malunion. This study presents a clinica…
View article: Thermographic Monitoring of Scum Accumulation beneath Floating Covers
Thermographic Monitoring of Scum Accumulation beneath Floating Covers Open
Large sheets of high-density polyethene geomembrane are used as floating covers on some of the wastewater treatment lagoons at the Melbourne Water Corporation’s Western Treatment Plant. These covers provide an airtight seal for the anaerob…
View article: Detection of Defects in Geomembranes Using Quasi-Active Infrared Thermography
Detection of Defects in Geomembranes Using Quasi-Active Infrared Thermography Open
High-density polyethylene geomembranes are employed as covers for the sewage treatment lagoons at Melbourne Water Corporation’s Western Treatment Plant, to harvest the biogas produced during anaerobic degradation, which is then used to gen…
View article: Computational Study of Scattering Elastic Waves Due to a Teredo Marine Borer-Like Cylindrical Defect Embedded in an Isotropic Solid Cylinder
Computational Study of Scattering Elastic Waves Due to a Teredo Marine Borer-Like Cylindrical Defect Embedded in an Isotropic Solid Cylinder Open
This paper showcases a quantitative investigation of scattering of ultrasonic waves experiences when impinging on a cylindrical defect inside a solid cylinder. Such cylindrical bores reduce the structural capacity of the cylinder, these de…
View article: A Machine Learning Approach for Anaerobic Reactor Performance Prediction Using Long Short-Term Memory Recurrent Neural Network
A Machine Learning Approach for Anaerobic Reactor Performance Prediction Using Long Short-Term Memory Recurrent Neural Network Open
Predictive models are important to help manage high-value assets and to ensure optimal and safe operations. Recently, advanced machine learning algorithms have been applied to solve practical and complex problems, and are of significant in…
View article: Quasi-Active Thermography for Structural Health Assessment of Large Geomembranes
Quasi-Active Thermography for Structural Health Assessment of Large Geomembranes Open
High density polyethylene (HDPE) geomembranes (approximately 8 hectares each) are employed as floating covers at the wastewater treatment plant of Melbourne Water in Werribee, Australia. The anaerobic lagoons at the plant rely on these HDP…
View article: Acoustic Emission of Metallic Specimen with Surface Defect During Fatigue Crack Growth
Acoustic Emission of Metallic Specimen with Surface Defect During Fatigue Crack Growth Open
Acoustic emission is defined as the phenomena whereby transient elastic waves are generated by the rapid release of localized sources within a material. During fatigue crack growth, the formation of new crack surfaces is associated with a …
View article: Quantitative Monitoring of Osseointegrated Implant Stability Using Vibration Analysis
Quantitative Monitoring of Osseointegrated Implant Stability Using Vibration Analysis Open
Reliable and quantitative assessments for the stability of the osseointegrated prostheses are desirable and advantageous in ensuring the success of the installation and long-term performance. However, the common evaluation techniques are q…
View article: Quasi-Active Thermal Imaging of Large Floating Covers Using Ambient Solar Energy
Quasi-Active Thermal Imaging of Large Floating Covers Using Ambient Solar Energy Open
Melbourne Water Corporation has two large anaerobic lagoons at the Western Treatment Plant (WTP), Werribee, Victoria, Australia. The lagoons are covered using numerous sheets of high-density polyethylene (HDPE) geomembranes to prevent the …
View article: Strain Monitoring Strategy of Deformed Membrane Cover Using Unmanned Aerial Vehicle-Assisted 3D Photogrammetry
Strain Monitoring Strategy of Deformed Membrane Cover Using Unmanned Aerial Vehicle-Assisted 3D Photogrammetry Open
Large structures and high-value assets require inspection and integrity assessment methodologies that ensure maximum availability and operational capabilities. Large membranes are used as floating covers at the anaerobic wastewater lagoons…
View article: Remote Monitoring of Floating Covers Using UAV Photogrammetry
Remote Monitoring of Floating Covers Using UAV Photogrammetry Open
High-density polyethylene (HDPE) is commonly the material of choice for covered anaerobic lagoons (CAL) at wastewater treatment plants. The membrane floats on the wastewater, and hence is called a “floating cover”, and is used for odour co…
View article: Non-radiative healing assessment techniques for fractured long bones and osseointegrated implant
Non-radiative healing assessment techniques for fractured long bones and osseointegrated implant Open
View article: Towards a Non-Invasive Technique for Healing Assessment of Internally Fixated Femur
Towards a Non-Invasive Technique for Healing Assessment of Internally Fixated Femur Open
The lack of a quantitative method to adequately assess fractured bone healing that has undergone fixation limits prognostic capabilities on patients’ optimal return to work. This paper addresses the use of vibrational analysis to monitor t…
View article: Healing assessment of fractured femur treated with an intramedullary nail
Healing assessment of fractured femur treated with an intramedullary nail Open
The ability to evaluate the degree of healing of a fractured bone is an integral part of orthopaedic clinical care. The conventional assessment techniques including X-ray and computed tomography are qualitative assessments, where their acc…
View article: A Quantitative Approach for the Bone-implant Osseointegration Assessment Based on Ultrasonic Elastic Guided Waves
A Quantitative Approach for the Bone-implant Osseointegration Assessment Based on Ultrasonic Elastic Guided Waves Open
Quantitative and reliable monitoring of osseointegration will help further evaluate the integrity of the orthopaedic construct to promote novel prosthesis design and allow early mobilisation. Quantitative assessment of the degree or the la…
View article: Measured Lamb wave radiation patterns from ⟨011⟩ Mn-PMN-PZT relaxor ferroelectric disks on an isotropic plate
Measured Lamb wave radiation patterns from ⟨011⟩ Mn-PMN-PZT relaxor ferroelectric disks on an isotropic plate Open
Three-dimensional laser Doppler vibrometry is used to quantify the modal composition of the guided plate waves generated by relaxor ferroelectric disk actuators of a ⟨011⟩ poled Mn-Pb(Mg1/3Nb2/3)O-lead zirconate titanate (PZT) single cryst…
View article: Using reciprocity to derive the far field displacements due to buried sources and scatterers
Using reciprocity to derive the far field displacements due to buried sources and scatterers Open
It is shown that elastodynamic reciprocity provides a simpler approach for deriving the far-field displacements due to buried (sub-surface) sources in a half-space, compared with integral transform techniques. The auxiliary fields employed…
View article: Experimental and Computational Studies on the Scattering of an Edge-Guided Wave by a Hidden Crack on a Racecourse Shaped Hole
Experimental and Computational Studies on the Scattering of an Edge-Guided Wave by a Hidden Crack on a Racecourse Shaped Hole Open
Reliable and quantitative non-destructive evaluation for small fatigue cracks, in particular those in hard-to-inspect locations, is a challenging problem. Guided waves are advantageous for structural health monitoring due to their slow geo…
View article: Lamb wave approach to identify hidden cracks in hard-to-inspect areas of metallic structures
Lamb wave approach to identify hidden cracks in hard-to-inspect areas of metallic structures Open
This thesis reports the results of a study of the scattering of the Lamb wave field due to the presence of a small crack in isotropic structures. The study addressed the challenge of detecting and quantifying a small defect at a hard-to-in…