A5111503308- Copper Interconnects and Reliability
- Semiconductor materials and devices
- Metal and Thin Film Mechanics
- Advanced ceramic materials synthesis
- Manufacturing Process and Optimization
- Plasma Diagnostics and Applications
- Injection Molding Process and Properties
- Advanced machining processes and optimization
- Heat Transfer Mechanisms
- Advanced Surface Polishing Techniques
- Additive Manufacturing and 3D Printing Technologies
- Brain Tumor Detection and Classification
- Diamond and Carbon-based Materials Research
- Scheduling and Optimization Algorithms
- Fluid Dynamics and Turbulent Flows
- Advancements in Photolithography Techniques
- Spectroscopy and Chemometric Analyses
- Advancements in Semiconductor Devices and Circuit Design
- High-Temperature Coating Behaviors
- Service and Product Innovation
- Semantic Web and Ontologies
- Process Optimization and Integration
- Heat Transfer and Optimization
- Additive Manufacturing Materials and Processes
- Advanced Control Systems Optimization
Institute of Technology Sligo
2014-2024
Atlantic Technological University
2022-2024
I-Form Advanced Manufacturing Research Centre
2021-2024
University College Dublin
2021-2024
Laboratoire de Tribologie et Dynamique des Systèmes
2021
Sligo University Hospital
2020
Institut polytechnique de Grenoble
2007-2014
CEA Grenoble
2005-2014
Centre National de la Recherche Scientifique
2010-2014
CEA LETI
2005-2014
Despite the recent progress in additive manufacturing (AM) process and technology, challenges repeatability reproducibility of AM parts still hinders adoption this technique many industries. This is particularly difficult when a part qualified on particular certain machine using optimised parameters. If manufacturer wishes to expand production multiple machines, ability translate these parameters different machines much be understood. In study, four metal L-PBF printers were used produce...
The manufacture of polyetheretherketone/hydroxyapatite (PEEK/HA) composites is seen as a viable approach to help enhance direct bone apposition in orthopaedic implants. A range methods have been used produce composites, including Selective Laser Sintering and injection moulding. Such techniques drawbacks lack flexibility complex, custom-designed 3D printing gets around many the restraints provides new opportunities for innovative solutions that are structurally suited meet needs patient....
CFD of convective heat transfer remains a challenge, especially in channels with irregular rough walls due to the complex fluid dynamics over and between these roughness elements. This study investigates performance four commonly utilised RANS models, namely Spalart-Allmaras (SA), Realisable k-ε, SST k-ω, Reynolds Stress Model (RSM) estimating velocity temperature profile as well skin friction coefficient Nusselt number smooth channels. The results were compared DNS experimental data...
Conformal cooling is a promising approach for reducing the cycle time and providing efficient in injection moulding. Evaluating effectiveness of performance would ideally be achieved via real-time data collection, facilitated by in-mould sensors. However, due to limited space caused presence conformal channels, embedding sensors optimal locations difficult. The design flexibility additive manufacturing (AM) complex internal geometries offers opportunities unique solutions overcome both...
This work focuses on the impact of oxidizing and reducing ash chemistries modifications two porous SiOCH films with varied porosities (8% [low porosity (lp)-SiOCH] 45% [high (hp)-SiOCH]). The processes have been performed blanket wafers in either reactive ion etching (RIE) or downstream (DS) reactors. remaining film after plasma exposures investigated using different analysis techniques such as x-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy (FTIR), reflectometry,...
Hardness is a useful measure of material’s resistance to permanent indentation; but for viscoelastic polymers, hardness data are highly dependent on the test type and parameter set chosen. Vickers microhardness testing used leave small indents (<150 µm) shown be applicable polymers. A detailed investigation required steps in isotactic polypropylene (iPP) provided. Samples should mounted epoxy resin order maintain curing temperatures at room temperature. Mounted samples can ground polished...
Abstract Injection moulding (IM) tools with embedded sensors can significantly improve the process efficiency and quality of fabricated parts through real-time monitoring control key parameters such as temperature, pressure injection speed. However, traditional mould tool fabrication technologies do not enable complex internal geometries. Complex geometries are necessary for technical applications sensor embedding conformal cooling which yield benefits improved cycle times. With techniques,...
Abstract Minimising cycle time without inducing quality defects is a major challenge in injection moulding (IM). Design of Experiment methods (DoE) have been widely studied for optimisation moulding, however existing limitations, including the need large number experiments within pre-determined search space. Bayesian adaptive design experiment (ADoE) an iterative process where results previous are used to make informed selection next design. In this study, experimental ADoE approach based on...
Abstract Additive manufacturing has received significant interest in the fabrication of functional channels for heat transfer; however, inherent rough surface finish additively manufactured can influence thermal performance. This study investigates impact roughness on thermo-fluid characteristics laminar forced convection minichannels. A numerical model was developed to create 3D Gaussian with specified root-mean-square height. The finite volume method used solve conjugate transfer flow...
State estimators, including observers and Bayesian filters, are a class of model-based algorithms for estimating variables in dynamical system given the sensor measurements related states. They can be used to derive fast accurate estimates that cannot measured directly (‘soft sensing’) or which only noisy, intermittent, delayed, indirect, unreliable available, perhaps from multiple sources (‘sensor fusion’). In this paper, we introduce concepts main methods state estimation review recent...
Determining the uniformity and consistency of droplet size in dispersed phase is key to emulsion stability. Conventional methods, which include manual microscopic evaluation laser diffraction, have presented many challenges achieve an accurate dispersion pharmaceutical emulsions. Artificial intelligence techniques demonstrated potential overcoming subjectivity time-consumption associated with approaches industry. A new automated machine learning approach this study predict in-process quality...
Porous SiCOH materials integration for integrated circuits faces serious challenges such as roughening during the etch process. In this study, atomic force microscopy is used to investigate kinetics of when they are etched in fluorocarbon plasmas. We show that root mean square roughness and correlation length linearly increase with depth, after an initiation period. propose that: (1) first few seconds process, surface porous gets denser. (2) Cracks formed, leading formation deep narrow pits....
Existing techniques in emulsion quality evaluation are found to be highly subjective, time-consuming, and prone overprocessing. Other conventional droplet analysis such as laser diffraction, which require dilution of samples, introduce an additional complexity industrial processes. The possibility developing a fully automated technique for characterization during emulsification holds remarkable potential overcoming the existing challenges. In this article, histogram-based image segmentation...
The use of personal protective equipment (PPE) has become essential to reduce the transmission coronavirus disease 2019 (COVID-19) as it prevents direct contact body fluid aerosols expelled from carriers. However, many countries have reported critical supply shortages due spike in demand during outbreak 2020. One potential solution ease pressure on conventional chains is local fabrication PPE, particularly face shields, their simplistic design. purpose this paper provide a research protocol...