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Bandwidth limits of luminescent solar concentrators as detectors in free-space optical communication systems

Light(Science & Applications) 2021年第1期10卷 29-40页

作者： Mark Portnoi paul anthony haigh Thomas JM acdonald Filip Ambroz Ivan PParkin Izzat Darwazeh loannis Papakonstantinou Photonic Innovations Lab Department of Electronic and Electrical EngineeringUniversity College LondonLondon WC1E 7JEUK School of Engineering University of NewcastleNewcastle NE17RUUK Department of Chemistry Imperial College LondonLondon W12 OBZUK Department of Chemistry University College LondonLondon WC1H OAJUK Department of Electronic and Electrical Engineering University College LondonLondon WC1E 7JEUK

Luminescent solar concentrators(LSCs)have recently emerged as a promising receiver technology in free-space optical communications due to their inherent ability to collect light from a wide field-of-view and concentrate it into small areas,thus leading to high optical *** high-speed communication systems integrating LSCs in their detector blocks have already been demonstrated,with the majority of efforts so far being devoted to maximising the received optical power and the system's ***,LSCs may pose a severe bottleneck on the bandwidth of such communication channels due to the comparably slow timescale of the fluorescence events involved,a situation further aggravated by the inherent reabsorption in these systems,and yet,an in-depth study into such dynamic effects remains absent in the *** fill this gap,we have developed a comprehensive analytical solution that delineates the fundamental bandwidth limits of LSCs as optical detectors in arbitrary free-space optical links,and establishes their equivalence with simple RC low-pass electrical ***,we demonstrate a time-domain Monte Carlo simulation platform,an indispensable tool in the multiparameter optimisation of LSC-based receiver *** work offers vital insight into LSC system dynamic behaviour and paves the way to evaluate the technology for a wide range of applications,including visible light communications,high-speed video recording,and real-time biological imaging,to name a few.

关键词： communication integrating devoted

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Visible light communications: 3.75 Mbits/s data rate with a 160 kHz bandwidth organic photodetector and artificial neural network equalization [Invited]

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Photonics Research 2013年第2期1卷 65-68页

作者： Zabih Ghassemlooy paul anthony haigh Francesco Arca Sandro Francesco Tedde Oliver Hayden Ioannis Papakonstantinou Sujan Rajbhandari Optical Communications Research Group Northumbria UniversityNE18STUK Siemens AG Corporate TechnologyErlangen CT T DE HW3Germany Department of Electronic&Electrical Engineering University College LondonWC1E 7JEUK Department of Engineering Science University of OxfordOX13PJUK

This paper presents an experimental demonstration of a visible light communications link with an light emitting diode and a low-bandwidth organic photodetector as transmitter and receiver,respectively,that achieves sub 4 Mbits∕s *** artificial neural network(ANN)equalizer is required in order to achieve such high data rates because of the influence of intersymbol *** digital modulation formats tested in this paper are nonreturn-to-zero on–off keying(OOK),and fourth-order pulse position modulation(4-PPM).Without equalization,data rates of 200 and 300 kbits∕s can be achieved for 4-PPM and OOK,*** ANN equalization,data rates of 2.8 and 3.75 Mbits∕s can be achieved for the first time for OOK and 4-PPM,respectively.

关键词： light visible symbol

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iDEAL-CIO: Instant Digital Express Advocated “Magic Lamp” for Cloud Intelligence Outlet

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Intelligent Information Management 2024年第1期16卷 35-63页

作者： Sheldon Liang paul anthony Miller Brendan Shane Rowe Alexis Rainbow Digital Innovation for Music Education Library and STEM Lane College Jackson TN USA

Instant Digital Express iDEAL-CIO The “Magic Lamp” for Cloud Intelligence Outlet, which has been recommended, combines innovations to satisfy modern users’ needs and efficiently sift through the ever-expanding amount of intelligent content stored in the cloud. One such innovation introduces a ground-breaking concept to remove superfluous and outdated sequential search patterns that overwhelm the user and computer in order to better serve the user in an eclectic & elastic and multidimensional approach to finding, grouping, assimilation, organizing, and delivering archival content. The cloud intelligence outlet (CIO) is presented in this article as the perfect magic lamp option for quick digital express advocacy. The grouping, indexing, folding, and targeting (GIFT) method of multidimensional online synthetic/analytical intelligent content (MOSAIC) for adaptive intelligence is the fundamental intelligent aggregation and automated process of the Magic Lamp. Three perspectives above this new ideal framework are available to observe: The Magic Lamp proposes contextual and multiple analytical tracks to improve cloud intelligence services conceptually. Technically speaking, MOSAIC combines domain-specific services for a wide range of international users, and through the usage of Cloud Intelligence Outlet, GIFT operationally activates grouping, indexing, folding, and targeting to promote decent experience and in-depth research on target for users’ wants. Because of this, iDEAL-CIO works in tandem with cloud extraction, digital transformation, and archival loading to provide improved service through the readily accessible cloud intelligence outlet.

关键词： iDEAL-CIO MOSAIC Multidimensional Online Synthetic/Analytical Intelligent Content

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Numerical study of a hybrid absorption-compression high temperature heat pump for industrial waste heat recovery

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Frontiers in Energy 2017年第4期11卷 503-509页

作者： Zhiwei MA Huashau BAO anthony paul ROSKILLY Sir Joseph Swan Centre for Energy Research Newcastle University Newcastle upon Tyne NEI 7RU UK

The present paper aims at exploring a hybrid absorption-compression heat pump （HAC-HP） to upgrade and recover the industrial waste heat in the temperature range of 60℃-120℃. The new HAC-HP system proposed has a condenser, an evaporator, and one more solution pump, compared to the conventional HAC-HP system, to allow flexible utilization of energy sources of electricity and waste heat. In the system proposed, the pressure of ammonia-water vapor desorbed in the generator can be elevated by two routes; one is via the compression of compressor while the other is via the condenser, the solution pump, and the evaporator. The results show that more ammonia-water vapor flowing through the compres- sor leads to a substantial higher energy efficiency due to the higher quality of electricity, however, only a slight change on the system exergy efficiency is noticed. The temperature lift increases with the increasing system recirculation flow ratio, however, the system energy and exergy efficiencies drop towards zero. The suitable operation ranges of HAC-HP are recommended for the waste heat at 60℃, 80℃, 100℃, and 120℃. The recirculation flow ratio should be lower than 9, 6, 5, and 4 respectively for these waste heat, while the temperature lifts are in the range of 9.8℃-27.7 ℃, 14.9℃~4.1 ℃, 24.4℃-64.1 ℃, and 40.7℃-85.7℃, respectively, and the system energy efficiency are 0.35-0.93, 0.32-0.90, 0.25- 0.85, and 0.14-0.76.

关键词： absorption compression high temperatureheat pump efficiency industrial waste heat thermodynamicanalysis

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Visible light communication with efficient far-red/near-infrared polymer light-emitting diodes

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Light(Science & Applications) 2020年第1期9卷 1362-1372页

作者： Alessandro Minotto paul A.haigh Łukasz G.Lukasiewicz Eugenio Lunedei Daniel T.Gryko Izzat Darwazeh Franco Cacialli Department of Physics and Astronomy and London Centre for Nanotechnology University College LondonLondon WC1E 6BTUK School of Engineering Newcastle UniversityNewcastle-upon-Tyne NE17RUUK Communications and Information Systems University College LondonLondon WC1E 6BTUK Institute of Organic Chemistry Polish Academy of Sciences01-224 WarsawPoland ISMN-CNR Institute for the Study of Nanostructured Materials40129 BolognaItaly

Visible light communication(VLC)is a wireless technology that relies on optical intensity modulation and is potentially a game changer for internet-of-things(IoT)***,VLC is hindered by the low penetration depth of visible light in non-transparent *** solution is to extend operation into the“nearly(in)visible”near-infrared(NIR,700-1000 nm)region,thus also enabling VLC in photonic bio-applications,considering the biological tissue NIR semitransparency,while conveniently retaining vestigial red emission to help check the link operativity by simple eye ***,we report new far-red/NIR organic light-emitting diodes(OLEDs)with a 650-800 nm emission range and external quantum efficiencies among the highest reported in this spectral range(>2.7%,with maximum radiance and luminance of 3.5 mW/cm^(2) and 260 cd/m^(2),respectively).With these OLEDs,we then demonstrate a“real-time”VLC setup achieving a data rate of 2.2 Mb/s,which satisfies the requirements for IoT and biosensing *** are the highest rates ever reported for an online unequalised VLC link based on solution-processed OLEDs.

关键词： communication diodes IoT

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Analysis of a 1 kW organic Rankine cycle using a scroll expander for engine coolant and exhaust heat recovery

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Frontiers in Energy 2017年第4期11卷 527-534页

作者： Yiji LU anthony paul ROSKILLY Long JIANG Longfei CHEN Xiaoli YU Sir Joseph Swan Centre for Energy Research Newcastle University Newcastle NE1 7RU UK Institute of Refrigeration and Cryogenics Shanghai Jiao TongUniversity Shanghai 200240 China School of Energy and Power Engineering Beihang University Beijing 100191 China Department of Energy Engineering Zhejiang University Hangzhou310027 China

The development of engine waste heat recov- ery technologies attracts ever increasing interests due to the rising strict policy requirements and environmental con- cerns. This paper presented the study of engine coolant and exhaust heat recovery using organic Rankine cycle （ORC）. Eight working fluids were selected to evaluate and compare the performance of the integrated waste heat recovery system. Rather than the conventional engine ORC system mainly focusing on the utilization of exhaust energy, this work proposed to fully use the engine coolant energy by changing the designed parameters of the ORC system. The case study selected a small engine as the heat source to drive the ORC system using a scroll expander for power production. The evaluation results suggest that under the engine rated condition, the solution to fully recover the engine coolant energy can achieve a higher power generation performance than that of the conven- tional engine ORC system. The results suggest that adding a recuperator to the ORC system can potentially improve the system performance when the working fluids are dry and the overall dumped heat demand of the system can be reduced by 12% under optimal conditions. When the ORC evaporating and condensing temperature are respectivelyset at 85℃ and 30℃, the integrated engine waste heat recovery system can improve the overall system efficiency by 9.3% with R600, R600a or n-Pentane as the working fluid.

关键词： organic Rankine cycle scroll expander cool-ant and exhaust recovery internal combustion engine

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Revisiting Emergency Food Reserve Policy and Practiceunder Disaster and Extreme Climate Events

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International Journal of Disaster Risk Science 2019年第1期10卷 1-13页

作者： Jonatan A.Lassa paul Teng Mely Caballero-anthony Maxim Shrestha Emergency and Disaster Management Studies Charles Darwin University Natural Sciences and Science Education National Institute of Education Centre for Non-Traditional Security Studies S. Rajaratnam School of International Studies (RSIS) Nanyang Technological University

All food systems will continue to be affected by disasters and extreme climate events. Triggered by recent food crises around the world and climate change concerns,some governments have been trying to develop more robust and resilient food systems. One of the oldest options for many governments is to stockpile emergency food reserves for the purpose of food security and disaster preparedness. In the aftermath of the world food price crises in2007–2008 and 2011, some governments in Asia have been maintaining emergency food reserves to ensure greater supply and price stability. Disasters and extreme climate events help governments to justify emergency food reserves. This research examined emergency food reserve policies in Indonesia, the Philippines, and *** food reserves emerged as a practice where the shared objectives of development, disaster risk reduction,and climate change adaptation have been demonstrated by governments. The findings suggest that most governments maintain the strong view that adequate emergency food reserves can buffer national food price shocks and shocks from disasters and climate change, and soften disruptions in trade due to export bans during times of disasters and climate *** global climate change scenarios, food security is at risk and volatile(Porter et al. 2014). The expected increase in climate extremes has generated anticipatory actions from governments, including a new push for EFR policy adoption. Triggered by recent disasters and climate change concerns, some governments have been trying to develop more robust and resilient food systems(Fan and Brzeska 2014; Porter et al. 2014). For many countries in Asia, this means the renewed adoption of EFR. Unfortunately, we argue that this is not well understood in climate change adaptation studies as well as contemporary disaster *** Association of Southeast Asian Nations(ASEAN)first initiated a Food Security Reserve Agreement in 1979,with the purpose of

关键词： Climate change adaptation Disaster preparedness Emergency food reserves Food security Food stockpiling Southeast Asia

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Efficient use of waste heat and solar energy： Technologies o cooling, heating, power generation and heat transfer

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Frontiers in Energy 2017年第4期11卷 411-413页

作者： Ya-Ling HE Ruzhu WANG anthony paul ROSKILLY Peiwen LI School of Energy and Power Engineering Xi'an Jiaotong University Xi'an 710049 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China Sir Joseph Swan Centre for Energy Research Newcastle University Newcastle upon Tyne NE1 7RU UK Department of Aerospace and Mechanical Engineering The University of ArizonaTucson AZ 85721 USA

As a research focus, energy conservation has attracted a great deal of attention in recent years due to the energy crisis and environmental pollution concerns. Many countries made great efforts on both research and implementing energy conservation technologies. Cur- rently more than 50% of the total world＇s delivered energy is consumed by industry and about one sixth of the total energy consumed is wasted as low-grade heat, for example through radiation loss, exhaust gas flows, and cooling fluid circuits. Therefore, the recovery and reuse of waste heat is an effective way to significantly improve energy utilization. In addition, solar energy can provide low grade heat and is a clean and renewable form of energy. The efficient use of low grade heat from these sources can play an important role for a large number of applications.

关键词： Efficient use solar energy

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Mechanically durable,super-repellent 3D printed microcell/nanoparticle surfaces

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Nano Research 2022年第6期15卷 5678-5686页

作者： Sajad Haghanifar anthony J Galante Mehdi Zarei Jun Chen Susheng Tan paul W Leu Department of Industrial Engineering University of PittsburghPittsburghPA 15261USA Department of Mechanical Engineering and Materials Science University of PittsburghPittsburghPA 15261USA Department of Electrical and Computer Engineering and Peterson Institute of NanoScience and Engineering University of PittsburghPittsburghPA 15261USA Department of Chemical Engineering University of PittsburghPittsburghPA 15261USA

Three-dimensional(3D)printed re-entrant micropillars have demonstrated high static contact angles for an unprecedented variety of liquids,but have yet to achieve this with low contact angle hysteresis and excellent abrasion *** report on the demonstration of 3D printed microcell/nanoparticle structures that exhibit high static contact angle,low contact angle hysteresis,and high mechanical *** and microcells both exhibit high static contact angles with water and ethylene glycol(EG),but suffer from high contact angle hysteresis,indicative of rose petal *** modeling results indicate that micropillars are able to achieve higher static contact angle and breakthrough pressure simultaneously compared with ***,simulations also indicate that micropillars have higher maximum equivalent stress at their bases,so that they are more prone to mechanical *** address contact angle hysteresis and mechanical durability issues by the creation of 3D printed microcell/nanoparticle arrays that demonstrate super-repellency and retain their super-repellency after 100 cycles of mechanical abrasion with a Scotch-Brite abrasive pad under a pressure of 1.2 *** use of interconnected microcell structures as opposed to micropillars addresses mechanical durability *** contact angle hysteresis is realized by coating 3D printed structures with low surface energy nanoparticles,which lowers the solid–liquid contact area *** results demonstrate new 3D printed structures with mechanical durability and super-repellency through the use of microcell structures integrated with fluorinated nanoparticles.

关键词： superomniphobicity three-dimensional(3D)printing surface evolver mechanical durability microcell re-entrant micropillar

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An improved culturing method for opiine fruit fly parasitoids and its application to parasitoid monitoring in the field

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Insect Science 2018年第1期25卷 99-108页

作者： Ayad Masry Michael J. Furlong anthony R. Clarke John paul Cunningham School of Earth Environmental and Biological Sciences School Queensland University of Technology (QUT) Brisbane Queensland Australia School of Biological Sciences the University of Queensland St Lucia Queensland Australia plant Biosecurity Cooperative Research Centre Bruce ACT Australia Department of Economic Development Jobs Transport and Resources AgriBio Centre La Trobe University Bundoora Victoria Australia

Good culturing methods play an important role in the study of insect behavior and its application to pest management. Here, we describe and validate a new method for rearing the parasitoid wasp, Diachasmirnorpha kraussii, which attacks some of the world＇s worst fruit fly pests and is an internationally used biological control agent. Our method differs from standard culturing approaches by presenting adult wasps with host- infested artificial media within a ＂culturing bag,＂ which mimics a natural （fruit） oviposition substrate. In laboratory trials using wild collected D. kraussii, the culturing bag method was compared to the use of host-infested nectarines, and a commonly used laboratory method of presenting host-infested artificial media within Petri dishes. The culturing bag method proved to be a significant improvement on both methods, combining the advantages of high host survival in artificial media with parasitism levels that were the equivalent to those recorded using host-infested fruits. In our field study, culturing bags infested with the Queensland fruit fly, Bactrocera tryoni, and hung in a mixed peach and nectarine orchard proved to be effective ＂artificial fruits＂ attracting wild D. kraussii for oviposition. Significantly more adult wasps were reared from the culturing bags compared to field collected fruits. This was shown to be due to higher fruit fly larval density in the bags, as similar percentage parasitism rates were found between the culturing bags and ripe fruits. We discuss how this cheap, time-efficient method could be applied to collecting and monitoring wild D. kraussii populations in orchards, and assist in maintaining genetic variability in parasitoid laboratory cultures.

关键词： Bactrocera biological control fruit fly mass rearing natural enemies Tephritidae wasp

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