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Liyanage, Namal Korea Photovoltaic Society 2020 한국태양광발전학회지 Vol.6 No.1
Sri Lanka has strongly understood the importance of mitigation of climate change and various measures have been taken. To tackle the climate change, after ratifying Paris Agreement, Sri Lanka has pledged to reduce her greenhouse gas emission in the energy sector by 20% (16% unconditional and 4% conditional) by 2030 based on the BAU scenario. Simultaneously, the government introduced its new energy policy and strategies in 2019 with a vision of achieving carbon neutrality by 2050. This paper survey related key government documents, policies, reports, and academic articles to investigate opportunities for the private sector to invest large scale solar power deployment (10 MW or above) and to get support from climate finance under article 6 of the Paris Agreement. It has found, growing concern on the environment, energy security issues and increase import expenses for fossil fuels are the main influencing factors to move renewable sources. Further, government investment and FDI both have gradually decreased in the energy sector. Therefore, an alternative financing mechanism is needed. Although the private sector allowed investing in the energy sector since 1996 with the introduction of IPP (Independent Power Producers), it could not make considerable progress on involving large scale solar utility projects. This has revealed government policy is not aligning with the long term generation plan of the electricity sector. The study has also found, it needs more strategic road map, coordination with different institutions, monitoring system to enhance large scale solar contribution.
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Performance Analysis of Ubiquitous Power Systems under Coordinated Control of System Elements
Liyanage, Kithsiri M.,Masuta, Taisuke,Shimizu, Koichiro,Kihara, Hiroyuki,Yokoyama, Akihiko,Ota, Yutaka,Nakajima, Tatsuhito,Taniguchi, Haruhito The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.1
The trend of integrating renewable energy sources into power networks is becoming common in practice, making power systems to be more ubiquitous in nature. The connection of renewable sources in large numbers at distribution level could cause adverse power fluctuations. By employing battery energy storage systems, these fluctuations can be reduced. However economic constraints imposed by high battery cost may not justify liberal use of battery storage to control power fluctuations. The authors have previously shown the possibility of reducing battery energy storage systems' capacity without degrading the performance in terms of energy capturing efficiency and arresting power fluctuations of a ubiquitous power network through coordinated control of elements. Meantime there are attempts to make use the battery energy storage available in electric vehicles to provide a cushion against power and frequency fluctuations caused by renewable generation. In this paper authors presents a comparison between the effectiveness of conventional battery energy storage system and that of battery energy storage available in electric vehicles to improve the performance of ubiquitous power network under coordinated control. This study has shown that energy storage from electric vehicles can outperform conventional battery energy storage systems of similar capacity range under certain conditions.
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Liyanage, D.S.,Omeka, W.K.M.,Yang, Hyerim,Godahewa, G.I.,Kwon, Hyukjae,Nam, Bo-Hye,Lee, Jehee Elsevier 2019 Fish & shellfish immunology Vol.86 No.-
<P><B>Abstract</B></P> <P>Thioredoxin domain-containing protein 17 (TXNDC17) is a small protein (∼14 kDa) involved in maintaining cellular redox homeostasis via a thiol-disulfide reductase activity. In this study, TXNDC17 was identified and characterized from <I>Hippocampus abdominalis</I>. The open reading frame (ORF) consisted of 369 bp and 123 amino acids. Similar to the other thioredoxins, TXNDC17 contained a conserved WCXXC functional motif. The highest spatial mRNA expressions of <I>HaTXNDC17</I> were observed in the muscle, brain, and intestine. Interestingly, the mRNA expression of <I>HaTXNDC17</I> in blood showed significant upregulation at 48 h against all the pathogen associated molecular patterns (PAMPs) and bacteria. Further, <I>HaTXNDC17</I> transcripts in the trunk kidney were significantly upregulated at 24–48 h by bacterial endotoxin lipopolysaccharides (LPS), viral mimic polyinosinic: polycytidylic acid (poly I:C), and gram-negative bacteria (<I>Edwardsiella tarda</I>). The DPPH assay showed that the radical scavenging activity varies in a concentration-dependent manner. The insulin reduction assay demonstrated a significant logarithmic relationship with the concentration of rHaTXNDC17. Moreover, FHM cells treated with recombinant HaTXNDC17 significantly enhanced cellular viability under oxidative stress. Together, these results show that HaTXNDC17 function is important for maintaining cellular redox homeostasis and that it is also involved in the immune mechanism in seahorses.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Big-belly seahorse thioredoxin domain containing protein 17 maintain redox homeostasis. </LI> <LI> TXNDC17 is ubiquitously found in cytosol and extracellular space. </LI> <LI> Thiol active CXXC conserved motif consists in HaTXNDC17. </LI> <LI> Spatial and temporal mRNA expression was evaluated. </LI> <LI> Radical scavenging ability, antioxidant activity and cellular viability were measured. </LI> </UL> </P>
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Liyanage, D.S.,Omeka, W.K.M.,Godahewa, G.I.,Lee, Jehee Elsevier 2018 Fish & shellfish immunology Vol.75 No.-
<P><B>Abstract</B></P> <P>Thioredoxin is a highly conserved protein found in both prokaryotes and eukaryotes. Reactive oxygen species (ROS) are produced in response to metabolic processes, radiation, metal oxidation, and pathological infections. High levels of ROS lead to cell death via autophagy. However, thioredoxin acts as an active regulatory enzyme in response to excessive ROS. Here, we performed <I>in-silico</I> analysis, immune challenge experiments, and functional assays of seahorse thioredoxin-like protein 1 (ShTXNL1). Evolutionary identification showed that ShTXNL1 protein belongs to the thioredoxin superfamily comprising 289 amino acids. It possesses an N-terminal active thioredoxin domain and C-terminal proteasome-interacting thioredoxin domain (PITH) of ShTXNL1 which is a component of 26S proteasome and binds to the matrix or cell. Pairwise alignment results showed 99.0% identity and 99.7% similarity with the sequence of <I>Hippocampus</I> species. Conserved thiol-disulfide cysteine residue containing Cys-X-X-Cys motif may be found in the first few amino acids in the second beta sheet starting from the N-terminus. This motif can be discovered in ShTXNL1 as <SUP>14</SUP>CRPC<SUP>17</SUP> and comprised two N-linked glycosylation sites at <SUP>72</SUP>NISA<SUP>75</SUP> and <SUP>139</SUP>NESD<SUP>142</SUP>. According to the quantitative real-time polymerase chain reaction analysis from healthy seahorses, highest <I>ShTXNL1</I> mRNA expression was observed in muscle, followed by ovary, brain, gill, and blood tissues. Moreover, significant temporal expression of <I>ShTXNL1</I> was observed in gill and blood tissues after bacterial stimuli. Thus, the <I>ShTXNL1</I> gene may be identified as an immunologically important gene in seahorse.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Big-belly seahorse thioredoxin-like protein 1 maintain redox homeostasis. </LI> <LI> TXNL1 is a component of 26S proteasome. </LI> <LI> Thiol active CXXC conserved motif consists in ShTXNL1. </LI> <LI> Spatial and temporal mRNA expression was evaluated. </LI> <LI> Radical scavenging ability, antioxidant activity, ferric-reducing activity measured. </LI> </UL> </P>
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Namal Liyanage 한국태양광발전학회 2020 한국태양광발전학회지 Vol.6 No.1
Sri Lanka has strongly understood the importance of mitigation of climate change and various measures have been taken. To tackle the climate change, after ratifying Paris Agreement, Sri Lanka has pledged to reduce her greenhouse gas emission in the energy sector by 20% (16% unconditional and 4% conditional) by 2030 based on the BAU scenario. Simultaneously, the government introduced its new energy policy and strategies in 2019 with a vision of achieving carbon neutrality by 2050. This paper survey related key government documents, policies, reports, and academic articles to investigate opportunities for the private sector to invest large scale solar power deployment (10 MW or above) and to get support from climate finance under article 6 of the Paris Agreement. It has found, growing concern on the environment, energy security issues and increase import expenses for fossil fuels are the main influencing factors to move renewable sources. Further, government investment and FDI both have gradually decreased in the energy sector. Therefore, an alternative financing mechanism is needed. Although the private sector allowed investing in the energy sector since 1996 with the introduction of IPP (Independent Power Producers), it could not make considerable progress on involving large scale solar utility projects. This has revealed government policy is not aligning with the long term generation plan of the electricity sector. The study has also found, it needs more strategic road map, coordination with different institutions, monitoring system to enhance large scale solar contribution.
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Driving Forces for Multi-Access Edge Computing (MEC) IoT Integration in 5G
Madhusanka Liyanage,Pawani Porambage,Aaron Yi Ding,Anshuman Kalla 한국통신학회 2021 ICT Express Vol.7 No.2
The emergence of Multi-Access Edge Computing (MEC) technology aims to extend cloud computing capabilities to the edge of the wireless access networks, i.e., closer to the end-users. Thus, MEC-enabled 5G wireless systems are envisaged to offer real-time, low-latency, and high-bandwidth access to the radio network resources. Thus, MEC allows network operators to open up their networks to a wide range of innovative services, thereby giving rise to a brand-new ecosystem and a value chain. Furthermore, MEC as an enabling technology will provide new insights into coherent integration of Internet of Things (IoT) in 5G wireless systems. In this context, this paper expounds the four key technologies, including Network Function Virtualization (NFV), Software Defined Networking (SDN), Network Slicing and Information Centric Networking (ICN), that will propel and intensify the integration of MEC IoT in 5G networks. Moreover, our goal is to provide the close alliance between MEC and these four driving technologies in the 5G IoT context and to identify the open challenges, future directions, and concrete integration paths.
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