Simon Park

• University of the Arts London

In recent years, metallic compression sleeves have gained prominence due to their role in enhancing the integrity of pipeline systems. These sleeves can potentially extend the operational life of pipelines by mitigating crack propagation and strengthening material properties. They offer an economically viable repair method, reducing operational dis...

Structural health monitoring (SHM) techniques designed for single phase flow pipelines can be difficult to apply to multiphase flow pipelines. Data collected for pipeline SHM can be affected by intermittent changes in flow characteristics associated with flow patterns. Therefore, determining the flow pattern can help to better predict the unsteadin...

The multifunctional soft sensor developed here is capable of simultaneously sensing six stimuli, including pressure, bending strain, temperature, proximity, UV light, and humidity, with high accuracy and without interference among the respective built-in components. The sensor is fabricated via a facile, scalable, and cost-effective supersonic cold...

The need for organ transplants has risen, but the number of available organ donations for transplants has stagnated worldwide. Regenerative medicine has been developed to make natural organs or tissue-like structures with biocompatible materials and solve the donor shortage problem. Using biomaterials and embedded cells, a bioprinter enables the fa...

Korea’s economy should develop a safe and cost-effective hydrogen transport system to realize the hydrogen economy. Among the methods of hydrogen transport, pipelines are the only feasible means of achieving cost-effective and safe transport over longer distances. This technical report proposes a method that would allow for using existing natural g...

Pipelines are mainly used to transport crude and refined petroleum, such as natural gas, worldwide. Monitoring pipeline health condition at offshore locations is challenging. Despite several attempts to develop leak detection systems, few can simultaneously detect the leak location and size. It is extremely difficult to obtain abnormal data such as...

Friction control is a vital green technology for reaching sustainable development goals, and surface texturing is effective and efficient at reducing friction. In this study, a novel preparation scheme involving dimpled groove texture is proposed. A pulsed laser marking system is used to make the dimpled grooves. Due to the unique design and proces...

There are several challenges associated with existing rupture detection systems such as their inability to accurately detect during transient (such as pump dynamics) conditions, delayed responses and their inability to transfer models to different pipeline configurations easily. To address these challenges, we employ multiple Artificial Intelligenc...

As a novel non-invasive structural health monitoring (SHM) technique for application to buried pipelines, in-situ vibration-based detection offers an approach to achieve continuous monitoring. Modal characteristics are often quantified using vibration signals, with traditional modal analysis performed using either impact-response testing or mechani...

In-line inspection is a non-destructive assessment method commonly used for defect assessment and monitoring of pipelines. The passage of an ILI tool through an excavated or exposed section of a pipe during an integrity assessment can excite vibrations and exert substantial forces, stress, and deflections on the pipe due to the weight and speed of...

Nitroaromatic explosives, such as 2-4-6 trinitrotoluene (TNT) are dangerous materials that pose safety and environmental risks. Even though many sensors have been reported for the detection of nitroaromatic explosives, a facile, rapid, cost-effective sensor is still sought-after in the field. Here we demonstrate a facile and rapid method to synthes...

Ammonia gas is an irritating and corrosive gas commonly used as fertilizers, refrigerants and cleaners. In this work, a sensitive and selective nanocomposite film is fabricated on a quartz crystal microbalance (QCM) with hybrid TiO2-SnO2/multi-walled carbon nanotubes (MWCNTs) doped Cu-BTC for trace amount of ammonia detection under ambient conditio...

Accurate subsurface sensing during directional drilling is critical in the mining and energy extraction industries. One challenge is to measure the azimuth accurately. Azimuth measurements are hindered by magnetic disturbances such as iron debris, especially when magnetometers are used. Moreover, gyroscopes are susceptible to shocks during drilling...

Great interest in improving lubricity, or reducing friction, of drilling muds used for horizontal oil well drilling is motivated by increasing the horizontal reach that can be attained by a single drilling site. However, there are a limited number of commercially available devices that can be used to evaluate novel drilling mud solutions under slid...

An operational modal response method for application to the structure health and integrity of pipelines is investigated. The modal response characteristics of externally-supported pipe structures are quantified through flow Reynolds number (Red) variation. Pipe flow turbulence and the resulting hydrodynamic pressure fluctuations on the interior pip...

This chapter examines tools, sensors, and machines required for micromilling operations. Micromachine tools are equipped with several features that increase machined part accuracy by limiting the amount of vibration, spindle run out, and thermal expansion of the machine tool components. Machine tools for micromilling generally have a minimum quanti...

To improve magnetic disturbance rejection and robustness of wellbore survey measurements, an adaptive neuro network-based fuzzy inference system (ANFIS) filter for wellbore position calculation is presented. This technique significantly improves magnetic disturbance rejection and reduces sensor error influence for borehole survey measurements. The...

Sensors provide aninterface between mechanical systems and the physical world. With the move towardsIndustry 4.0 and cyber-physical systems, demands for cost-effective sensors are rapidly increasing. Conventional sensors used for monitoring manufacturing processes are often bulky and need complex processes. In this study, a novel high-sensitive nan...

The modal response characterization of structures is a proven and reliable technique used to monitor system behavior and change, providing information for condition assessment and damage identification. In traditional modal response characterization procedures, an external mass excitation source is used to excite the system, and this is modeled as...

High friction between a fluid and a pipe wall results in increased pumping requirements. This friction contributes to lower production rates and reduced system capacity. Thermal heating, fluid blending, and drag reducing agents (DRA) are commonly used methods for decreasing pressure drop in pipelines. Surface patterns inscribed onto internal pipe w...

Carbon steel piping can be exposed to environments that contain various chemical and organic elements that induce corrosion and cracking events. This can lead to the loss of fluid into surrounding sensitive and remote environments. To minimize this inherent risk, various coating technologies have been utilized over the years in industry. These coat...

Demonstrating the ability to reliably detect pipeline ruptures is critical for pipeline operators as they seek to maintain the social license necessary to construct and upgrade their pipeline systems. Current leak detection systems range from very simple mass balances to highly complex models with real-time simulation and advanced statistical proce...

Surface texturing is one mechanism that friction coefficients in both dry and lubricated contacts can be reduced compared with untextured, flat surfaces. End milling and shot blasting are two processes used to produce surface textures, including monolithic textures that have one type of surface feature, as well as multi-scale roughness features whe...

Tribological properties of electrospun polymer-based microbeads dispersed in mineral oil were investigated. Microbeads composed of polyvinylpyrrolidone, zinc oxide and multi-walled carbon nanotubes (MWCNTs) were generated using an electrospinning apparatus. The influence of various electrospinning parameters such as voltage, injection rate and conc...

Tribological properties of electrospun polymer-based microbeads dispersed in mineral oil were investigated. Microbeads composed of polyvinypyrrolidone, zinc oxide and multi-walled carbon nanotubes (MWCNTs) were generated using an electrospinning apparatus. The influence of various electrospinning parameters such as voltage, injection rate and conce...

A simple, low-cost, and reliable process of production for conductive tracks and their transfer to polydimethylsiloxane (PDMS) substrate has been proposed. Flexible electrodes were fabricated using conductive nanoparticulates under intensive pulsed light which were then transferred on to a PDMS substrate via a pouring, curing, and peeling process....

3D printing and moulding (3DPM) method is applied to the fabrication of a miniature magnetic actuator for optical image stabilization (OIS) applications. Polydimethylsiloxane (PDMS) and strontium ferrite (SrFe) nano powder are used as the main structural materials. Young’s modulus and the magnetization of the material with SrFe-doping ratios rangin...

In this study, new composite coatings are fabricated and investigated for their applications as the metal coating. The studied coatings consist of two-layered composites with various nanoparticulates as fillers in a polymeric matrix (styrene acrylic). The first layer bonded to the steel plate uses a combination of zinc particles, multi-walled carbo...

Ultrasonic atomic force microscopy (AFM) and its associated derivatives are nondestructive techniques that can elucidate subsurface nanoscale structures and properties. Despite the usefulness of these techniques, the physical contrast mechanisms responsible for the reported subsurface features observed in ultrasonic AFM are not well defined. In thi...

To evaluate the effects of surface roughness for a slider bearing operating under partial or boundary lubrication, a new approach with both stochastic and contact characteristics is proposed. It has become important to study the phenomenon of asperity contact in bearings because the growth of contact area under heavy load conditions induces severe...

Accurate measurements of cutting forces are critical in machining operations for maximizing production, detecting tool wear and failure, adaptive control and monitoring. Traditionally, cutting forces are measured using piezoelectric quartz force sensors or strain gauges. These types of sensors have limitations in that they are unable to measure sta...

Leakage in oil and gas infrastructure, often cause significant financial losses, severe damage to the environment and raises public concern. In order to minimize the impact of spills, quick detection of a leak and a rapid response are needed. The systems currently employed to detect pipeline leakage range from simple visual checking to complex hard...

High performance coatings of pipelines should possess properties such as high adhesion to the substrate, low gas permeability, high corrosion resistance, etc. In this study, novel nanocomposite materials are studied for coating of steel plates. The coatings consist of two-layer composites with different nanoparticulates. Zinc particles, multi-walle...

We developed a simple method to prepare hybrid copper-silver conductive tracks under flash light sintering. The developed metal nanoparticle-based ink is convenient because its preparation process is free of any tedious washing steps. The inks were composed of commercially available copper nanoparticles which were mixed with formic acid, silver nit...

In this paper, we present a wearable microsystem for minimally invasive, autonomous and pseudo-continuous blood glucose monitoring that addresses growing demand for replacing tedious fingerpricking tests for diabetic patients. Unlike the prevalent solutions that estimate blood glucose levels from interstitial fluids or tears, our approach uses a no...

Abstract In this study, directional friction effects by creating asymmetrically shaped dimpled surfaces on an aluminum workpiece were investigated. The surfaces were created using the inclined micro-flat end milling process. Inclined micro-milling forces were modeled, and subsequent comparisons with the measured forces have provided validation. The...

Functionalized carbon nanotubes (CNTs), particularly CNTs decorated with nanoparticles (NPs), are of interest due to their synergic effects, such as surface enhanced Raman scattering, plasmonic resonance energy transfer, as well as magneto-plasmonic, magneto-electric and magneto-optical effects. In general, research has focused on a single type of...

This article proposes a novel cuff-based microactuator for automatic blood extraction using Shape Memory Alloy (SMA) technology. It aims to provide an actuator solution for an electronic mosquito-like device, e-Mosquito, which enhances blood glucose measurement to off the potential to significantly improve both the quality of life for diabetic pati...

Leakage in pipelines carrying oil and natural gas cause significant financial losses and extreme environmental damage and endanger public safety. This study describes the design and fabrication of a costeffective in situ carbon nanotube (CNT) reinforced polymeric nanocomposite based sensor network system for direct hydrocarbon leak detection. CNT n...

The aim of this study was to investigate the effects of foaming on the electrical properties of carbon nanotube (CNT)-reinforced polystyrene (PS). A pseudo-three-dimensional (3D) model based on random walk simulation was developed for predicting the electrical properties of CNT nanocomposites. The electromagnetic interference shielding effectivenes...

A lot of effort has been put into accurately modelling virtual prototypes prior to physical building of structures, in order to minimize cost and time while improving performance. However, there are often significant discrepancies between the dynamics of virtual prototypes and actual physical structures, which are mainly caused by improper joint dy...

The aim of this study was the development of a novel chaotic mixing system utilizing two cylinder rotors rotating in a sinusoidal fashion to uniformly mix multi-walled carbon nanotubes (MWCNTs) with a polymer matrix. To investigate the influences of important mixing parameters and optimize the mixing conditions, four major parameters were selected;...

Complex structures, such as machine tools, are comprised of several substructures connected to each other through joints to form the assembled structures. Joints can have significant contributions on the behavior of the overall assembly and ignoring joint effects in the design stage may result in considerable deviations from the actual dynamic beha...

Accurate virtual machine tool models minimize the need for costly and time consuming physical trials before eventual physical prototyping. Design of accurate machine tools requires modeling of the joint dynamics between the tool and tool holder as well as between the tool holder and the spindle. To obtain the joint dynamics at these interfaces, we...

Graphene and carbon nanotubes have been used in polymeric nanocomposites for improved mechanical, electrical, thermal and gas barrier properties. When properly dispersed, a very small loading of carbon-based nanoparticles can significantly improve the properties of a base polymer. As the major applications of these relatively new materials are expe...

In order to achieve an overall low cost micro-pump, the valves, a critical micro-pump subcomponent, have been targeted for design for low manufacturing cost, high endurance, and reliability. In the proposed design, the inlet and outlet valves are etched on one piece of planar stainless steel shim stock. To investigate the static and dynamic behavio...

Multi-walled carbon nanotube (MWCNT)/polystyrene (PS) composites were injection molded into a mold equipped with three different cavities. A high alignment of MWCNTs in PS was achieved by applying high shear force to the melt. The effects of gate and runner designs and processing conditions, i.e., mold temperature, melt temperature, injection/holdi...

The appropriate selection of design concepts has a strong influence on product cost, durability, robust-ness and functionality. Effective tools to identify good design concepts are critical. Different design method-ologies have different objectives to aid in making the right decision. Some design methods are complemen-tary, whereas others may provi...