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Now showing items 317-336 of 557

Nanosecond passively Q-switched fibre laser using a NiS2 based saturable absorber

Li, Shi; Yin, Yu; Ouyang, Qiuyun; Ran, Guicang; Chen, Yujin; Lewis, Elfed; Farrell, Gerald; Tokurakawa, Masaki; Harun, Sulaiman Wadi; Wang, Pengfei (Optical Society of America, 2019)

Q-switched pulse laser generation is successfully demonstrated in both Erbiumdoped fibre laser (EDFL) and Thulium-doped fibre laser (TDFL) cavities by employing Nickel disulfide (NiS2) as a saturable absorber (SA). ...
Neither wasted nor wanted: theorising the failure to dispossess objects of ambiguous value

Casey, Katherine; Lichrou, Maria; O'Malley, Lisa; Fitzpatrick, Colin (Association for Consumer Research, 2019)

Consumer research has traditionally presented the consumption process in three stages – acquisition, consumption and disposition (de Coverly et al. 2008; Jacoby, Berning, and Dietvorst 1977) and it is assumed that consumers ...
A neural network based approach for determination of optical scattering and absorption coefficients of biological tissue

Warncke, Dennis; Lewis, Elfed; Lochmann, Steffen; Leahy, M. (IOP Publishing, 2009)

The propagation of light in biological tissue depends on the absorption and reduced scattering coefficient. The aim of this project is the determination of these two optical properties using spatially resolved reflectance ...
Neuro-Fuzzy dynamic position prediction for autonomous work-class ROV docking

Trslić, Petar; Omerdić, Edin; Dooly, Gerard; Toal, Daniel (MDPI, 2020)

This paper presents a docking station heave motion prediction method for dynamic remotely operated vehicle (ROV) docking, based on the Adaptive Neuro-Fuzzy Inference System (ANFIS). Due to the limited power onboard the ...
New adaptive speech enhancement system using a novel wavelet thresholding technique

Mahdi, Abdulhussain E.; Jafer, Essa (World Scientific and Engineering Academy and Society (WSEAS), 2004)

A new adaptive speech enhancement system, which utilizes a second-generation wavelet transform (SGWT) decomposition and a novel adaptive subband thresholding technique, is presented. The adaptive thresholding technique ...
A new fault tolerant architecture for time sensitive automation networks

Kleineberg, Oliver (University of Limerick, 2014)

Networked control systems have been widely used in Industrial Automation since the latter part of the 20st century. Such networks have evolved from small systems with proprietary and slow Fieldbus technology to a much ...
New model for explaining the over-response phenomenon in percentage of depth dose curve measured using inorganic scintillating materials for optical fiber radiation sensors

Qin, Zhuang; Xie ,Tianci; Dai, Xinyu; Zhang, Bin; Ma, Yu; Khan, Ihsan Ullah; Zhang, Xu; Li, Haopeng; Yan, Yongji; Zhao, Wenhui; Li, Song; Chen, Ziyin; Zhang, Daxin; Xu, Jun; Hu, Xiaokang; Xing, LIna; Feng, Kun; Lewis, Elfed; Sun, Weimin (Optical Society of America, 2019)

.Inorganic scintillating material used in optical fibre sensors (OFS) when used as dosimeters for measuring percentage depth dose (PDD) characteristics have exhibited significant differences when compared to those measured ...
New single-ended objective measure for non-intrusive speech quality evaluation

Mahdi, Abdulhussain E.; Picovici, Dorel (Springer, 2010)

This article proposes a new output-based method for non-intrusive assessment of speech quality of voice communication systems and evaluates its performance. The method requires access to the processed (degraded) speech ...
New tools for easing system integration, deployment, monitoring and maintenance of ocean energy devices

Omerdić, Edin; Toal, Daniel; Finn, Paddy (European Association for the Development of Renewable Energies, Environment and Power Quality, 2010)

This paper describes a set of novel aiding tools and technologies for system integration, deployment, monitoring and maintenance of ocean energy devices. The main component of the system is smart remotely operated vehicle ...
NiO-TiO2 thick-films for detection of alcohol vapours at room temperature

Lyons, Gerard M.; Arshak, Khalil; Cavanagh, Leon M.; Gaidan, Ibrahim; Moore, Edward G.; Clifford, S.A.; Phelan, R.; Cunniffe, Colm; Harris, John A. (IEEE Computer Society, 2004)

The response of screen-printed thick-films of NiO/TiO2 to organic solvent vapours was studied. It was found that these films displayed a significant resistance change in response to the vapours even at room temperature. ...
Noise susceptibility of precision temperature sense architectures in highly integrated power converters

Murray, Derek M (University of Limerick, 2013)

The design specifications for power converters are getting continuously tighter, keeping pace with the ever-increasing power requirements of the loads they supply. A step-down DC-DC converter used in modern computing ...
Non-contact biopotential sensor for remote human detection

Mahdi, Abdulhussain E.; Faggion, Lorenzo (IOP Publishing, 2011)

This paper describes a new low-cost, low-noise displacement current sensor developed for non-contact measurements of human biopotentials and well suited for detection of human presence applications. The sensor employs a ...
Non-invasive haemoglobin monitoring by an LED based optical sensor system

Timm, Ulrich (University of Limerick, 2011)

During the perioperative period, which includes the period before surgery (preoperative), during surgery (intraoperative) and after surgery (postoperative), it is essential to measure diagnostic parameters such as: blood ...
Non-invasive optical real-time measurement of total hemoglobin content

Timm, Ulrich; Leen, Gabriel; Lewis, Elfed; McGrath, D.; Kraitl, J.; Ewald, Hartmut (Elsevier, 2010)

Hemoglobin (Hb) is an important component of red blood cells. The primary function of Hb is to transport oxygen from the lungs to the body tissues and to carry carbon dioxide back to the lungs from the body tissues. The ...
A novel approach to electronic nose-head design, using a copper thin film electrode patterning technique

Arshak, Khalil; Cunniffe, Colm; Moore, Edward G.; Cavanagh, Leon M.; Harris, John A. (IEEE Computer Society, 2005)

Presented in this paper is a process for manufacturing copper electrode patterns on alumina substrates using thin film deposition, spin coating and printed circuit board (PCB) etching techniques. The process was used for ...
Novel inorganic scintillating detectors and their applications in small animal irradiators: measurements and Monte Carlo simulations

Byrne, Kevin; Alharbi, Majed; O'Keeffe, Sinéad; Kleefeld, Christoph; Bazalova-Carter, Magdalena; Foley, Mark (SPIE: The International Society for Optics and Phontonics, 2020)

In the field of radiation therapy, optical fiber dosimeters (OFD) offer several advantages over conventional dosimeters for real-time dosimetry. Their sensing tips can be small in size affording them the potential for high ...
Novel layered 2D materials for ultrafast photonics

Li, Shi; Wang, Cong; Yin, Yu; Lewis, Elfed; Wang, Pengfei (De Gruyter, 2020)

A range of new 2D materials have recently been reported, including topological insulators, transition-metal dichalcogenides, black phosphorus, MXenes, and metal-organic frameworks, which have demonstrated high optical ...
Novel layered 2D materials for ultrafast photonics

Lia, Shi; Wanga, Cong; Yin, Yu; Lewis, Elfed; Wang, Pengfei (De Gruyter Open, 2020)

A range of new 2D materials have recently been reported, including topological insulators, transitionmetal dichalcogenides, black phosphorus, MXenes, and metal-organic frameworks, which have demonstrated high optical ...
Novel layered 2D materials for ultrafast photonics

Lia, Shi; Wanga, Cong; Yin, Yu; Lewis, Elfed; Wang, Pengfei (De Gruyter, 2020)

A range of new 2D materials have recently been reported, including topological insulators, transitionmetal dichalcogenides, black phosphorus, MXenes, and metal-organic frameworks, which have demonstrated high optical ...
Novel optical fiber SPR temperature sensor based on MMF-PCF-MMF structure and gold PDMS film

Wang, Yong; Huang, Qing; Zhu, Wenjie; Yang, Minghong; Lewis, Elfed (Optical Society of America, 2018)

In this paper, a novel optical fiber temperature sensor based on surface plasmon resonance (SPR) is presented. The sensor consists of multimode fiber-photonic crystal fiber-multimode fiber (MMF-PCF-MMF) structure coated ...

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