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Hybrid PSO-Complex Algorithm Based Parameter Identification for a Composite Load Model
Del Castillo, Manuelito Y. Jr.,Song, Hwachang,Lee, Byongjun The Korean Institute of Electrical Engineers 2013 Journal of Electrical Engineering & Technology Vol.8 No.3
This paper proposes a hybrid searching algorithm based on parameter identification for power system load models. Hybrid searching was performed by the combination of particle swarm optimization (PSO) and a complex method, which enhances the convergence of solutions closer to minima and takes advantage of global searching with PSO. In this paper, the load model of interest is composed of a ZIP model and a third-order model for induction motors for stability analysis, and parameter sets are obtained that best-fit the output measurement data using the hybrid search. The origin of the hybrid method is to further apply the complex method as a local search for finding better solutions using the selected particles from the performed PSO procedure.
Comparative Sequence Analysis of a Multidrug-Resistant Plasmid from Aeromonas hydrophila
del Castillo, Carmelo S.,Hikima, Jun-ichi,Jang, Ho-Bin,Nho, Seong-Won,Jung, Tae-Sung,Wongtavatchai, Janenuj,Kondo, Hidehiro,Hirono, Ikuo,Takeyama, Haruko,Aoki, Takashi American Society for Microbiology 2013 Antimicrobial agents and chemotherapy Vol.57 No.1
<B>ABSTRACT</B><P>Aeromonas hydrophilais a pathogenic bacterium that has been implicated in fish, animal, and human disease. Recently, a multidrug resistance (MDR) plasmid, pR148, was isolated fromA. hydrophilaobtained from a tilapia (Oreochromis niloticus) farm in Thailand. pR148 is a 165,906-bp circular plasmid containing 147 coding regions showing highest similarity to pNDM-1_Dok1, an MDR plasmid isolated from a human pathogen. pR148 was also very similar to other IncA/C plasmids isolated from humans, animals, food, and fish. pR148 contains a mercuric resistance operon and encodes the complete set of genes for the type 4 secretion system. pR148 encodes a Tn<I>21</I>type transposon. This transposon contains the drug resistance genes<I>qacH</I>,<I>bla</I>OXA-10,<I>aadA1</I>, and<I>sul1</I>in a class 1 integron;<I>tetA</I>and<I>tetR</I>in transposon Tn<I>1721</I>; and<I>catA2</I>and a duplicate<I>sul1</I>in a locus showing 100% similarity to IncU plasmids isolated from fish. The<I>bla</I>OXA-10and<I>aadA1</I>genes showed 100% similarity to those from theAcinetobacter baumanniiAYE genome. The similarity of pR148 to a human pathogen-derived plasmid indicates that the plasmids were either transferred between different genera or that they are derived from a common origin. Previous studies have shown that IncA/C plasmids retain a conserved backbone, while the accessory region points to lateral gene transfer. These observations point out the dangers of indiscriminate use of antibiotics in humans and in animals and the necessity of understanding how drug resistance determinants are disseminated and transferred.</P>
Characterization and functional analysis of two PKR genes in fugu (<i>Takifugu rubripes</i>)
del Castillo, Carmelo S.,Hikima, Jun-ichi,Ohtani, Maki,Jung, Tae-Sung,Aoki, Takashi Elsevier 2012 FISH AND SHELLFISH IMMUNOLOGY Vol.32 No.1
<P><B>Abstract</B></P><P>PKR (protein kinase R) is a serine–threonine kinase that inhibits protein synthesis by the phosphorylation of the eukaryotic translation initiation factor 2-alpha (eIF2α), and activates NFκB by inducing NFκB-inducing kinase and IκB (inhibitor of NFκB) kinase. This can lead to antiviral and anti-proliferative effects. In this study, the complete sequence and organization of two fugu PKR genes (fPKRs) were determined by <I>in silico</I> analysis and conventional PCR. The full-length <I>fPKR1</I> and <I>fPKR2</I> genes were 3832 bp and 4325 bp, which encoded 523 and 492 amino acids, respectively. Both encoded two dsRNA binding domains and a Serine/Threonine protein kinase domain, and showed very high similarity to green spotted puffer PKRs. Gene expression of the two fPKRs was measured by quantitative real-time PCR on tissue samples from healthy fish and peripheral blood leukocytes stimulated with polyinosinic:polycytidylic acid (PolyI:C) or lipopolysaccharides (LPS). The fPKRs were highly expressed in the skin and fPKR2 was significantly induced in PBLs by PolyI:C but not by LPS. The fPKRs inhibited translation of a luciferase reporter gene in a dose-dependent manner and induced transcriptional activity of a mammalian NFκB luciferase reporter. These results demonstrate that two PKRs in a single species can both be independently, but not equally, functional and support the hypothesis that fish PKRs have roles in the innate immune response similar to those of mammalian PKRs.</P> <P><B>Highlights</B></P><P>► The complete sequence and structure of two PKR genes in fugu were determined. ► The fugu PKRs were highly expressed in the skin of healthy fish. ► The fugu PKRs were demonstrated to inhibit luciferase activity and induce NFκB.</P>
Hybrid PSO-Complex Algorithm Based Parameter Identification for a Composite Load Model
Manuelito Y. Del Castillo, Jr,Hwachang Song,Byongjun Lee 대한전기학회 2013 Journal of Electrical Engineering & Technology Vol.8 No.3
This paper proposes a hybrid searching algorithm based on parameter identification for power system load models. Hybrid searching was performed by the combination of particle swarm optimization (PSO) and a complex method, which enhances the convergence of solutions closer to minima and takes advantage of global searching with PSO. In this paper, the load model of interest is composed of a ZIP model and a third-order model for induction motors for stability analysis, and parameter sets are obtained that best-fit the output measurement data using the hybrid search. The origin of the hybrid method is to further apply the complex method as a local search for finding better solutions using the selected particles from the performed PSO procedure.