• Influence of co- and counter-propagating light on the phase-mismatch effect in semiconductor optical amplifiers 

  Kharraz, O.M.; Connelly, Michael J.; Supa'at, A.S.M.; Abas, A.F.; Alresheedi, M.T.; Mahdi, M.A. (Elsevier, 2020)

  The phase-mismatch effect, caused by the difference in confinement factor between transverse electric (TE) and transverse magnetic (TM) modes, has not been observed in semiconductor optical amplifiers (SOAs) and is not ...
• Future of artificial intelligence in anesthetics and pain management 

  McGrath, Harry; Flanagan, Colin; Zeng, Liaoyuan; Lei, Yiming (Scientific Research Publishing, 2019)

  The potential of the second wave of Artificial Intelligence (AI) to change our lives beyond recognition is both exciting and challenging. AI has been around for over three decades, and this new approach of artificial ...
• An Analytical model for describing the power coupling ratio between multimode fibers with transverse displacement and angular misalignment in an optical fiber bend sensor 

  Kam, Wern; Ong, Yong Sheng; O’Keeffe, Sinead; Mohammed, Waleed S.; Lewis, Elfed (MDPI, 2019)

  The power coupling ratio between step-index multimode fibers caused by combined transversal and angular misalignment is calculated. A theoretical description of the coupling efficiency between two optical fibers based on ...
• Phase-mismatch dependence of the four-wave mixing effect in semiconductor optical amplifiers 

  Kharraz, O.M.; Connelly, Michael J.; Supa'at, A.S.M.; Abas, A.F.; Alresheedi, M.T.; Mahdi, M.A. (Optical Society of America, 2020)

  The phase-mismatch effect due to polarization-dependent mode confinement factor has been shown to be not a crucial problem in semiconductor optical amplifiers (SOAs) and is usually not accounted for. The phase-mismatch ...
• Dual-wavelength mode-locked erbium-doped fiber laser based on tin disulfide thin film as saturable absorber 

  Li, Shi; Yin, Yu; Ran, Guicang; Ouyang, Qiuyun; Chen, Yujin; Tokurakawa, Masaki; Lewis, Elfed; Wadi Harun, Sulaiman; Wang, Pengfei (AIP Publishing, 2019)

  The use of tin disulfide (SnS 2) as a candidate material for saturable absorption in nonlinear optical devices is investigated in this article. A dual-wavelength soliton mode-locked fiber laser is demonstrated using a ...
• Future e-waste scenarios 

  Parajuly, Keshaw; Kuehr, Ruediger; Awasthi, Abhishek Kumar; Fitzpatrick, Colin; Lepawsky, Josh; Smith, Elisabeth; Widmer, Rolf; Zeng, Xianlai (2019)

  This paper is published by the StEP Initiative, UNU ViE-SCYCLE, and UNEP IETC. THE STEP INITIATIVE The Solving the E-waste Problem (StEP) Initiative is a network of e-waste experts and a multi-stakeholder platform for ...
• Multiple controlled antirandom testing (MCAT) for high fault coverage in a black box environment 

  Alamgir, Arbab; Bin A'ain, Abu Khari; Sheikh, Usman Ullah; Paraman, Norlina; Mokji, Musa Mohd; Grout, Ian (IEEE, 2019)

  Among the black-box approaches to digital circuit testing, Random testing is popular due to its simplicity and cost effectiveness. Unfortunately, available evidences suggest that Random testing is equipped with a number ...
• Designing an ultra-low-power RTU for use in NB-IoT water applications 

  Ganchev, Ivan; Ji, Zhanlin; Ó'Droma, Máirtín (EDP Sciences, 2019)

  Abstract. This paper presents the design and realization of a ultra-low-power and low-cost remote transfer unit (RTU), working as an outdoor gateway for collecting hydrographic data, such as rainfall, water flow rate, water ...
• Reconfigurable modular optical fibre resonance sensor system using field programmable gate array 

  Ong, Yong Sheng (University of Limerick, 2019)

  The optical fibre sensor (OFS) has been studied for the last few decades and has found extensive use in many scientific and engineering fields including major application areas such as environmental, chemical, and biomedical. ...
• A study into the electrical trim of silicon chromium thin film resistors 

  Downey, Fergus (University of Limerick, 2014)

  Silicon Chromium (SiCr) Thin Film Resistors (TFRs) have been developed and integrated into CMOS ICs for over twenty years. Current state of the art sputtering technology achieves integrated resistors with temperature ...
• Investigation of YAG:Ce-based optical fibre sensor for use in ultra-fast external beam radiotherapy dosimetry 

  Chen, Lingxia; O'Keeffe, Sinéad; Chen, Shuilin; Woulfe, Peter; Gillespie, Sean; Jiang, Benxue; Lewis, Elfed (IEEE Computer Society, 2019)

  Radiation dosimetry plays a crucial role in the quality assurance in radiotherapy. To date, this is limited to monitoring the overall dose over the complete beam time, and so, there is limited information on the actual ...
• Dissipative soliton generation in Er Er-doped fibre laser using SnS SnS2 as saturable absorber 

  Li, Shi; Yin, Yu; Ouyang, Qiuyun; Chen, Yujin; Lewis, Elfed; Farrell, Gerald; Tokurakawa, Masaki; Wadi Harun, Sulaiman; Wang, Pengfei (IOP Publishing, 2019)

  Dissipative soliton generation is successfully demonstrated in an Erbium-doped mode-locked fibre laser using Tin Disulfide (SnS2) as a saturable absorber in the near-zero dispersion regime. A stable dissipative soliton ...
• Pilot study of a two-arm non-randomized controlled cluster trial of a psychosocial intervention to improve late life depression in socioeconomically deprived areas of São Paulo, Brazil (PROACTIVE): feasibility study of a psychosocial intervention for late life depression in São Paulo 

  Scazufca, Marcia; de Paula Couto, Maria Clara P.; Henrique, Maiara Garcia; Mendes, Ana Vilela; Matijasevich, Alicia; Pereda, Paula Carvalho; Franzin, Renato M.; Seabra, Antônio Carlos; van de Ven, Pepijn; Hollingworth, William; Peters, Tim J.; Araya, Ricardo (BMC, 2019)

  Background: Depression is a common and recurrent condition among older adults and is associated with poor quality of life and increased health care utilization and costs. The purpose of this pilot study was to assess the ...
• Reducing sample consumption for serial crystallography using acoustic drop ejection 

  Davy, Bradley; Axford, Danny; Beale, John H.; Butryn, Agata; Docker, Peter; Ebrahim, Ali; Leen, Gabriel; Orville, Allen M.; Owen, Robin L.; Aller, Pierre (International Union of Crystallography, 2019)

  Efficient sample delivery is an essential aspect of serial crystallography at both synchrotrons and X-ray free-electron lasers. Rastering fixed target chips through the X-ray beam is an efficient method for serial delivery ...
• Real-Time secure/unsecure video latency measurement/analysis with FPGA-based bump-in-the-wire security 

  Kaknjo, Admir; Rao, Muzaffar; Omerdic, Edin; Newe, Thomas; Toal, Daniel (MDPI, 2019)

  With the growth of the internet of things (IoT), many challenges like information security and privacy, interoperability/standard, and regulatory and legal issues are arising. This work focused on the information security ...
• 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). ...
• Temperature-insensitive refractometer based on an RI-modulated singlemode-multimode-singlemode fibre structure 

  Wang, Pengfei; Zhang, Shuo; Wang, Ruoning; Farrell, Gerald; Zhang, Meng; Geng, Tao; Lewis, Elfed; Tian, Ke (2019)

  A temperature-insensitive refractometer based on a refractive index (RI)-modulated singlemode-multimode-singlemode (RMSMS) fibre structure is proposed and experimentally demonstrated. In this investigation, a combination ...
• Observing the viscous relaxation process of silica optical fiber at ~1000 C using regenerated fiber bragg grating 

  Cui, Zhiru; Gong, Jianhui; Wang, Chen; Che, Nana; Zhao, Yanshuang; Chai, Quan; Qi, Haifeng; Lewis, Elfed; Ren, Jing; Zhang, Jianzhong; Yang, Jun; Yuan, Libo; Peng, Gang-Ding (2019)

  A regenerated fiber Bragg grating (RFBG) in silica fiber was used to observe the viscous relaxation process of the host silica fiber at high temperatures of around 1000 C. Two factors, preannealing time and loaded tension, ...
• Airborne wind energy- a review 

  Salari, Mahdi Ebrahimi; Coleman, Joseph; Toal, Daniel (Springer, 2017)

  Airborne Wind Energy (AWE) is a new approach to harvest stronger wind streams at higher altitudes for renewable energy. This paper reviews recent developments in this field. Conventional wind energy and current constrains ...
• Multiple compound Tamm waves with Uller-Zenneck wave characteristics guided by dissipative dielectric defect in periodic multilayered isotropic dielectric material 

  Danyal, Muhammad; Maab, Husnul; Rahim, Arbab Abdur; Ali, Muhammad Mahmood (IOP Publishing, 2019)

  A canonical problem configured in three different arrangements of periodic multilayered isotropic dielectric material layers with a dissipative dielectric defect, to guide multiple compound Tamm waves with Uller–Zenneck ...

View more