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RISS 인기검색어
- 검색키워드
- 저자 : Ouwerkerk, Pieter B. F. (검색결과 4 건)
- 무료
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- 유료
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6.6 kW On-Vehicle Charger with a Hybrid Si IGBTs and SiC SBDs Based Booster Power Module
Han, Timothy Junghee,Preston, Jared,Ouwerkerk, David The Korean Institute of Power Electronics 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.4
In this paper, a hybrid booster power module with Si IGBT and Silicon Carbide (SiC) Schottky Barrier Diode (SBDs) is presented. The switching characteristics of the hybrid booster module are compared with commercial Silicon IGBT/Si PIN diode based modules. We applied the booster power module into a non-isolated on board vehicle charger with a simple buck-booster topology. The performances of the on-vehicle charger are analyzed and measured with different power modules. The test data is measured in the same system, at the same points of operation, using the conventional Si and hybrid Si/SiC power modules. The measured power conversion efficiency of the proposed on-vehicle charger is 96.4 % with the SiC SBD based hybrid booster module. The conversion efficiency gain of 1.4 % is realizable by replacing the Si-based booster module with the Si IGBT/SiC SBD hybrid boost module in the 6.6 kW on-vehicle chargers.
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Construction and Application of Efficient<i>Ac-Ds</i>Transposon Tagging Vectors in Rice
Qu, Shaohong,Jeon, Jong-Seong,Ouwerkerk, Pieter B.F.,Bellizzi, Maria,Leach, Jan,Ronald, Pamela,Wang, Guo-Liang Wiley (Blackwell Publishing) 2009 Journal of integrative plant biology Vol.51 No.11
<P>Transposons are effective mutagens alternative to T-DNA for the generation of insertional mutants in many plant species including those whose transformation is inefficient. The current strategies of transposon tagging are usually slow and labor-intensive and yield low frequency of tagged lines. We have constructed a series of transposon tagging vectors based on three approaches: (i) AcTPase controlled by glucocorticoid binding domain/VP16 acidic activation domain/Gal4 DNA-binding domain (GVG) chemical-inducible expression system; (ii) deletion of AcTPase via Cre-lox site-specific recombination that was initially triggered by Ds excision; and (iii) suppression of early transposition events in transformed rice callus through a dual-functional hygromycin resistance gene in a novel Ds element (HPT-Ds). We tested these vectors in transgenic rice and characterized the transposition events. Our results showed that these vectors are useful resources for functional genomics of rice and other crop plants. The vectors are freely available for the community.</P>
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6.6 kW On-Vehicle Charger with a Hybrid Si IGBTs and SiC SBDs Based Booster Power Module
Timothy Junghee Han,Jared Preston,David Ouwerkerk 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.4
In this paper, a hybrid booster power module with Si IGBT and Silicon Carbide (SiC) Schottky Barrier Diode (SBDs) is presented. The switching characteristics of the hybrid booster module are compared with commercial Silicon IGBT/Si PIN diode based modules. We applied the booster power module into a non-isolated on board vehicle charger with a simple buck-booster topology. The performances of the on-vehicle charger are analyzed and measured with different power modules. The test data is measured in the same system, at the same points of operation, using the conventional Si and hybrid Si/SiC power modules. The measured power conversion efficiency of the proposed on-vehicle charger is 96.4 % with the SiC SBD based hybrid booster module. The conversion efficiency gain of 1.4 % is realizable by replacing the Si-based booster module with the Si IGBT/SiC SBD hybrid boost module in the 6.6 kW on-vehicle chargers.
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The D-lineage MADS-box gene <i>OsMADS13</i> controls ovule identity in rice
Dreni, Ludovico,Jacchia, Sara,Fornara, Fabio,Fornari, Monica,Ouwerkerk, Pieter B. F.,An, Gynheung,Colombo, Lucia,Kater, Martin M. Blackwell Publishing Ltd 2007 The Plant journal Vol.52 No.4
<P>Summary</P><P>Genes that control ovule identity were first identified in <I>Petunia</I>. Co-suppression of both <I>FLORAL BINDING PROTEIN 7</I> (<I>FBP7</I>) and <I>FBP11</I>, two D-lineage genes, resulted in the homeotic transformation of ovules into carpelloid structures. Later in Arabidopsis it was shown that three genes, <I>SHATTERPROOF1</I> (<I>SHP1</I>), <I>SHP2,</I> and <I>SEEDSTICK</I> (<I>STK</I>), redundantly control ovule identity, because in the <I>stk shp1 shp2</I> triple mutant ovules lose identity and are transformed into carpel and leaf-like structures. Of these three Arabidopsis genes <I>STK</I> is the only D-lineage gene, and its expression, like <I>FBP7</I> and <I>FBP11</I>, is restricted to ovules. <I>OsMADS13</I> is the rice ortholog of <I>STK</I>, <I>FBP7,</I> and <I>FBP11</I>. Its amino acid sequence is similar to the Arabidopsis and <I>Petunia</I> proteins, and its expression is also restricted to ovules. We show that the <I>osmads13</I> mutant is female sterile and that ovules are converted into carpelloid structures. Furthermore, making carpels inside carpels, the <I>osmads13</I> flower is indeterminate, showing that <I>OsMADS13</I> also has a function in floral meristem determinacy. <I>OsMADS21</I> is most likely to be a paralog of <I>OsMADS13</I>, although its expression is not restricted to ovules. Interestingly, the <I>osmads21</I> mutant did not show any obvious phenotype. Furthermore, combining the <I>osmads13</I> and the <I>osmads21</I> mutants did not result in any additive ovule defect, indicating that <I>osmads21</I> does not control ovule identity. These results suggest that during evolution the D-lineage gene <I>OsMADS21</I> has lost its ability to determine ovule identity.</P>
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