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Institution

Dublin City University

EducationDublin, Ireland
About: Dublin City University is a education organization based out in Dublin, Ireland. It is known for research contribution in the topics: Machine translation & Laser. The organization has 5904 authors who have published 17178 publications receiving 389376 citations. The organization is also known as: National Institute for Higher Education, Dublin & DCU.


Papers
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Journal ArticleDOI
TL;DR: An analytical sheath model for a capacitively coupled radio-frequency plasma discharge operated with two frequencies is proposed and studied under the assumptions of a time-independent, collisionless ion motion.
Abstract: In recent years, there has been an increased interest in capacitively coupled plasma discharges which are operated with two frequencies. An analytical sheath model for a capacitively coupled radio-frequency plasma discharge operated with two frequencies is proposed and studied under the assumptions of a time-independent, collisionless ion motion. Expressions are obtained for the time-average electric potential within the sheath, nonlinear motion of the electron sheath boundary and nonlinear instantaneous sheath voltage. The derived model is valid under the condition that the low frequency (lf) electric field Elf in the sheath is much higher than the high frequency (hf) electric field Ehf. This condition is fulfilled within typical dual frequency conditions. It is shown, however, that the hf electric field modifies the sheath structure significantly because of the electron response to Ehf. This model has been compared to particle-in-cell plasma simulations, finding good quantitative agreement. We present the dependence of the maximum sheath width and the dc sheath voltage drop on the hf/lf current ratio and on the hf/lf frequency ratio.

113 citations

Journal ArticleDOI
TL;DR: The aim of the study was to determine the effects of variations in eccentric loading and knee joint range of motion on performance enhancement associated with the stretch-shortening cycle in vertical jumping.

113 citations

Journal ArticleDOI
TL;DR: Easy- Swarm is developed, an open-source UAV swarming platform that adopts the LoRa radio at the physical layer and a low-latency channel access protocol at the MAC layer, showing that using LoRa leads to better reliability, in particular allowing for higher swarm density and longer coverage distance, than when WiFi is used.
Abstract: UAVs are powerful IoT components, offering sensing, communications and data analysis in the air. Recently, 3GPP TS 22.261, TR 22.862, and TR 36.777 have specified performance requirements for communications between multiple UAVs in the 5G domain. This article discusses communications reliability challenges in a UAV swarm context. Recommendations for designing an ultra-reliable communications system for UAV swarms are introduced with a focus on the software protocol stack and RF hardware. For the purpose of demonstration, we developed Easy- Swarm, an open-source UAV swarming platform that adopts the LoRa radio at the physical layer and a low-latency channel access protocol at the MAC layer. Real-life testbeds are built consisting of 10 UAVs and 20 robotic cars that produce background traffic. LoRa, WiFi and LTE networks are employed to provide broadband and cellular wireless network support. Results show that using LoRa leads to better reliability, in particular allowing for higher swarm density and longer coverage distance, than when WiFi is used. In addition, LTE provides the best reliability and latency for UAV swarms with good network connectivity.

113 citations

Journal ArticleDOI
TL;DR: In this paper, the catalytic ring-opening polymerization of macrolactones to polyethylene-like polyesters was investigated using aluminum-salen complexes as the initiators.
Abstract: The catalytic ring-opening polymerization of macrolactones to polyethylene-like polyesters was investigated using aluminum–salen complexes as the initiators. Contrary to the common understanding that high molecular weights in these reactions can only be achieved by enzymatic ring-opening polymerization due to the absence of ring tension in macrolactones, the aluminum–salen complexes produces poly(pentadecalactone)s with number-average molecular weights (Mn) of over 150 000 g/mol. Moreover, the same catalyst is also active in catalyzing the ROP of small and medium size lactones, which makes these aluminum–salen complexes highly potential catalysts for the cROP of lactones irrespective of ring size. These results show that it is possible to polymerize macrolactones to high molecular weight polyethylene-like polymers using cheap and robust metal-based catalysts. Even the so-called medium-sized lactones (ring size: 9–12) can be polymerized with a reasonably good activity to high molecular weight products, whi...

112 citations

Journal ArticleDOI
TL;DR: It is suggested that Notch promotes changes in hVSMC phenotype via activation of CBF-1/RBP-Jkappa-dependent pathways in vitro and contributes to the phenotypic response of VSMCs to cyclic strain-induced changes in VSMC differentiation.
Abstract: Vascular smooth muscle cell (VSMC) phenotypic modulation is a key factor in vascular pathology. We have investigated the role of Notch receptor signaling in controlling human vascular smooth muscle...

112 citations


Authors

Showing all 6059 results

NameH-indexPapersCitations
Joseph Wang158128298799
David Cameron1541586126067
David Taylor131246993220
Gordon G. Wallace114126769095
David A. Morrow11359856776
G. Hughes10395746632
David Wilson10275749388
Muhammad Imran94305351728
Haibo Zeng9460439226
David Lloyd90101737691
Vikas Kumar8985939185
Luke P. Lee8441322803
James Chapman8248336468
Muhammad Iqbal7796123821
Michael C. Berndt7622816897
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202367
2022261
20211,110
20201,177
20191,030
2018935