• Title/Summary/Keyword: Sequence type

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CONVERGENCE RATE OF CONVOLUTION TYPE DELTA SEQUENCE IN HIGHER DIMENSION

  • SHIM HONG TAE;PARK CHIN HONG
    • Journal of applied mathematics & informatics
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    • v.17 no.1_2_3
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    • pp.701-707
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    • 2005
  • Delta sequences play an important role in convergence and approximation theory. Much of classical approximation theory is based on delta sequence. The rate of convergence of certain types of these sequences in Sobolev spaces has recently been studied. Here we estimate convergence rate of convolution type delta sequence in higher dimension.

Genetic Diversity of Toxoplasma gondii Strains from Different Hosts and Geographical Regions by Sequence Analysis of GRA20 Gene

  • Ning, Hong-Rui;Huang, Si-Yang;Wang, Jin-Lei;Xu, Qian-Ming;Zhu, Xing-Quan
    • Parasites, Hosts and Diseases
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    • v.53 no.3
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    • pp.345-348
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    • 2015
  • Toxoplasma gondii is a eukaryotic parasite of the phylum Apicomplexa, which infects all warm-blood animals, including humans. In the present study, we examined sequence variation in dense granule 20 (GRA20) genes among T. gondii isolates collected from different hosts and geographical regions worldwide. The complete GRA20 genes were amplified from 16 T. gondii isolates using PCR, sequence were analyzed, and phylogenetic reconstruction was analyzed by maximum parsimony (MP) and maximum likelihood (ML) methods. The results showed that the complete GRA20 gene sequence was 1,586 bp in length among all the isolates used in this study, and the sequence variations in nucleotides were 0-7.9% among all strains. However, removing the type III strains (CTG, VEG), the sequence variations became very low, only 0-0.7%. These results indicated that the GRA20 sequence in type III was more divergence. Phylogenetic analysis of GRA20 sequences using MP and ML methods can differentiate 2 major clonal lineage types (type I and type III) into their respective clusters, indicating the GRA20 gene may represent a novel genetic marker for intraspecific phylogenetic analyses of T. gondii.

Research on Carried-Based PWM with Zero-Sequence Component Injection for Vienna Type Rectifiers

  • Ma, Hui;Feng, Mao;Tian, Yu;Chen, Xi
    • Journal of Power Electronics
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    • v.19 no.2
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    • pp.560-568
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    • 2019
  • This paper studies the inherent relationship between currents and zero-sequence components. Then a precise algorithm is proposed to calculate the injected zero-sequence component to control the DC-Link neutral-point voltage balance, which can result in a more efficient and flexible neutral point voltage balance with a desirable performance. In addition, it is shown that carried-based PWM with the calculated zero-sequence component scheme can be equivalent to space-vector pulse-width modulation (SVPWM). Based on the proposed method, the optimal zero-sequence component of the feasible modulation indices is analyzed. In addition, the unbalanced load limitation of the DC-Link neutral-point voltage balance control is also revealed. Simulation and experimental results are shown to verify the validity and practicality of the proposed algorithm.

Genome Sequence and Comparative Genome Analysis of Pseudomonas syringae pv. syringae Type Strain ATCC 19310

  • Park, Yong-Soon;Jeong, Haeyoung;Sim, Young Mi;Yi, Hwe-Su;Ryu, Choong-Min
    • Journal of Microbiology and Biotechnology
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    • v.24 no.4
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    • pp.563-567
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    • 2014
  • Pseudomonas syringae pv. syringae (Psy) is a major bacterial pathogen of many economically important plant species. Despite the severity of its impact, the genome sequence of the type strain has not been reported. Here, we present the draft genome sequence of Psy ATCC 19310. Comparative genomic analysis revealed that Psy ATCC 19310 is closely related to Psy B728a. However, only a few type III effectors, which are key virulence factors, are shared by the two strains, indicating the possibility of host-pathogen specificity and genome dynamics, even under the pathovar level.

Identification and sequence analysis of small subunit ribosomal RNA gene of bovine Theileria isolates from Korea and Japan (한국과 일본 소에 감염된 Theileria 분리주의 small subunit ribosomal 유전자의 동정 및 분석)

  • Chae, Joon-seok;Park, Jin-ho;Kwon, Oh-deog;Waghela, Suryakant D.;Holman, Patricia J.;Wagner, Gerald G.;Lee, Joo-mook
    • Korean Journal of Veterinary Research
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    • v.38 no.4
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    • pp.909-917
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    • 1998
  • Six different sequences types(A through E and H) and a subtype(Bl) of the small subunit ribosomal RNA(SSUrRNA) gene were found in bovine Theileria isolates from different areas of Korea and Japan. The sequences were aligned and three hypervariable regions were observed in the nucleotide position ranges 212~231, 261~270 and 632~690. Five of the Theileria isolates yielded sequence type A; these were the field isolates KCB, KCN, and KCJ, and the laboratory stock KLS, all from Korea, and a single isolate from Japan (JHS). This sequence type is identical to the SSUrRNA gene sequence listed for Theileria buffeli (GenBank Accession No. Z15106) from Marula, Kenya. The Korean field isolate KKB yielded only a single sequence type (B), but multiple sequence types were found in some isolates. For example, KCB and JHS isolates yielded both types A and B ; isolate KKW showed types B and H; isolate KCN showed types A, C, and D ; and isolate KCJ showed types A, B, E, and a subtype B1. Finding of the multiple sequences SSUrRNA gene sequences suggests that bovine Theileria isolates from both Korea and Japan may consist of mixed populations.

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Genetic Variation of the Mitochondrial Cytochrome b Sequence in Korean Rana rugosa (Amphibia; Ranidae)

  • Hyun Ick Lee;Dong Eun Yang;Yu Ri Kim;Hyuk Lee;Jung Eun Lee;Suh Yung Yang;Hei Yung Lee
    • Animal cells and systems
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    • v.3 no.1
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    • pp.89-96
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    • 1999
  • Nucleotide sequences of a 501 base-pair (bp) fragment in the mitochondrial cytochrome b (cyt b) gene were analyzed for 12 populations of Rana rugosa from Korea and Japan using a polymerase chain reaction (PCR) and direct silver sequencing. Two genetically distinct groups (type-A and type-B) were found in Korea. Type-A was found throughout most of South Korea and type-B was restricted to the mid-southeastern regions (Samchok, Yongdok, Chongsong and Pohang). But in the Tonghae population, both types were found. The level of mitochondrial DNA (mtDNA) sequence differences ranged from 0% to .0.8% among six populations of type-A, and 0 to 1.0% among 4 populations of type-B. However, sequence differences between type-A and type-B ranged from 5.4% to 6.6%, Using Kimura's two-parameter distance, the level of genetic sequence divergence between type-A and type-B was 6.7%. The Japanese R. rugosa was clustered very far from the Korean R. rugosa with 14.7%. In the neighbor-joining and UPGMA tree, all Korean samples were grouped, but subdivided into two types in 99% of the bootstrap iteration.

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Stability of Iterative Sequences Approximating Common Fixed Point for a System of Asymptotically Quasi-nonexpansive Type Mappings

  • Li, Jun;Huang, Nan-Jing;Cho, Yeol Je
    • Kyungpook Mathematical Journal
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    • v.47 no.1
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    • pp.81-89
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    • 2007
  • In this paper, we introduce the concept of a system of asymptotically quasinonexpansive type mappings. Furthermore, we define a $k$-step iterative sequence approximating common fixed point for a system of asymptotically quasi-nonexpansive type mappings and study its stability in real Banach spaces.

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Construction of a Temperature Controlled Expression Ve e tor in Saccharumy ces cerevisiae (Saccharomyces cerevisiae를 이용한 온도조절형 발현 Vector의 개발)

  • 최진옥;황용일
    • Microbiology and Biotechnology Letters
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    • v.21 no.3
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    • pp.214-220
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    • 1993
  • The mating type a of yeast, Saccharomyces cerevisiae mutant with hmla2-102 and sir3-8ts was changed to type alpha by changing the growth temperature from 25C to 35C. A temperature-sensitive expression vector system was constructed using mating factor alpha1 (Mfalpha1) gene encoding alpha factor which is expressed in the type alpha cells. Vectors with different copy numbers were constructed by joining the promoter and pre or prepro-secretion single sequence of Mfalpha1 to promoterless PHO5' gene as a reporter gene.

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A Functional Design of Programmable Logic Controller Based on Parallel Architecture (병렬 구조에 의한 가변 논리제어장치의 기능적 설계)

  • 이정훈;신현식
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.40 no.8
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    • pp.836-844
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    • 1991
  • PLC(programmable logic controller) system is widely used for the control of factory. PLC system receives ladder diagram which is drawn by the user to implement hardware logic, converts the ladder diagram into sequence program which is executable in the PLC system, and executes the sequence program indefinitely unless user breaks. The sequence program processes the data of on/off signal, and endures 1 scan delay and missing of pulse-type signal shorter than a scan time. So, data dependency doesn't exist. By applying theis characteristics to multiprocessor architecture, we design parellel PLC functionally and evaluate performance upgrade. Parallel PLC consists of central processing module, N general processing unit, and a shared memory by master-slave type. Each module executes allocated sequence program by the control of central processing module. We can expect performance upgrade by parallel processing, and reliability by relocation of sequence program when error occurs in processing module.

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