• Title/Summary/Keyword: D-domain

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Trend of Wide Viewing Angle Technology

  • Hong, Hyung-Ki;Shin, Hyun-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 2000.01a
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    • pp.7-8
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    • 2000
  • We compared various LCD modes for wide viewing angle. These modes can be classified as film-compensation, multi-domain, IPS. So far, IPS and multi-domain VA represent best performance. The performance gap with respect to CRT is diminishing.

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Numerical Study of the Radiation Potential of a Ship Using the 3D Time-Domain Forward-Speed Free-Surface Green Function and a Second-Order BEM (3 차원 시간영역 전진속도 자유표면 Green 함수와 2 차 경계요소법을 사용한 선체의 방사포텐셜 수치계산)

  • Hong, Do-Chun;Hong, Sa-Young
    • Journal of the Society of Naval Architects of Korea
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    • v.45 no.3
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    • pp.258-268
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    • 2008
  • The radiation potential of a ship advancing in waves is studied using the 3D time-domain forward-speed free-surface Green function and the Green integral equation. Numerical solutions are obtained by making use of the 2nd order BEM(Boundary Element Method) which make it possible to take account of the line integral along the waterline in a rigorous manner. The 6 degree of freedom motion memory functions of a hemisphere and the Wigley seakeeping model obtained by direct integration of the time-domain 3D potentials over the wetted surface are presented for various Froude numbers.

Cloning, Purification, and Structural Characterization by 1D 1H-NMR of the PDZ domain of the Shank3 protein (Shank3 PDZ 도메인의 동정, 정제 및 1차 NMR 구조분석)

  • Sung, Mee-Sook
    • Journal of Life Science
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    • v.17 no.3 s.83
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    • pp.345-349
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    • 2007
  • We wished to create a set of small molecular weight PDZ domain ligands that may be used in functional studies on the proteins AF6, PSD-95 and Shank. As a starting point, the Shank3 PDZ domain was cloned, purified, and characterized the structure of Shank3 PDZ domain by 1D $^1H-NMR$. The chemical shift dispersion of the proton signals indicates that the purified Shank3 PDZ protein is very pure and globally well folded. Currently, we are working on improving the yield of the protein production for complete NMR structural analysis of the Shank3 PDZ domain.

Analysis of Human O-GlcNAcase Gene and the Expression of the Recombinant Gene. (사람의 O-linked N-acetyl-$\beta$-D-glucosaminidase 유전자의 분석과 재조합 발현)

  • 강대욱;서현효
    • Korean Journal of Microbiology
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    • v.40 no.2
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    • pp.87-93
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    • 2004
  • Dynamic modification of cytoplasmic and nuclear proteins by O-linked N-acetylglucosamine (O-GlcNAc) on Ser and Thr residues is ubiquitous in higher eukaryotes. And this modification may serve as a signaling mod-ification analogous to protein phosphorylation. Addition and cleavage of O-GlcNAc are catalyzed by O-linked GlcNAc transferase (OGT) and O-linked N-acety1glucosaminidase (O-GlcNAcase), respectively. Two types of human O-GlcNAcase gene were cloned and expressed as three fusion proteins in Escherichia coli. O-GlcNA-case activity showed in the order of thioredoxin fusion> $6{\times}His$ tag> GST fusion. O-GlcNAcase had enzy-matic activity against only ${\rho}$NP-GlcNAc of seven tested substrate analogs. Blast search revealed that O-GlcNAcase has two conserved domains, amino terminal hyaluronidase-like domain and carboxy terminal N-acetyltransferase domain. Extensive deletion studies were done to define catalytically important domains. The deletions of hyaluronidase-like domain and N-acetyltransferase domain abolished enzyme activity. But, N-ter-minal 55 amino acid deletion and C-terminal truncation showed lower activity. Based on deletion analysis, we suggest that hyaluronidase-like domain is essential for enzyme activity and carboxy terminal N-acetyltrans-ferase domain may be modulatory function.

Effect of Domain Size on Flow Characteristics in Simulating Periodic Obstacle Flow (주기적인 경계조건을 사용하는 수치모사에서 계산영역 크기의 영향)

  • Choi, Choon-Bum;Jang, Yong-Jun;Kim, Jin-Ho;Han, Seok-Youn;Yang, Kyung-Soo
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.33 no.5
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    • pp.349-357
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    • 2009
  • Effect of computational domain size in simulating of periodic obstacle flow has been investigated for the flow past tube banks. Reynolds number, defined by freestream velocity ($U_{\infty}$) and cylinder diameter (d), was fixed as 200, and center-to-center distance (P) as 1.5d. In-line square array and staggered square array were considered. Drag coefficient, lift coefficient and Strouhal number were calculated depending on domain size. Circular cylinders were implemented on a Cartesian grid system by using an immersed boundary method. Boundary condition is periodic in both streamwise and lateral directions. Previous studies in literature often use a square domain with a side length of P, which contains only one cylinder. However, this study reveals that the domain size is improper. Especially, RMS values of flow-induced forces are most sensitive to the domain size.

Two Extensions of a Star Operation on D to the Polynomial Ring D[X]

  • Chang, Gyu Whan;Kim, Hwankoo
    • Kyungpook Mathematical Journal
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    • v.61 no.1
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    • pp.23-32
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    • 2021
  • Let D be an integral domain with quotient field K, X an indeterminate over D, ∗ a star operation on D, and Cl∗ (D) be the ∗-class group of D. The ∗w-operation on D is a star operation defined by I∗w = {x ∈ K | xJ ⊆ I for a nonzero finitely generated ideal J of D with J∗ = D}. In this paper, we study two star operations {∗} and [∗] on D[X] defined by A{∗} = ∩P∈∗w-Max(D) ADP [X] and A[∗] = (∩P∈∗w-Max(D) AD[X]P[X]) ∩ AK[X]. Among other things, we show that Cl∗(D) ≅ Cl[∗](D[X]) if and only if D is integrally closed.

Three-dimensional Finite Difference Modeling of Time-domain Electromagnetic Method Using Staggered Grid (엇갈린 격자를 이용한 3차원 유한차분 시간영역 전자탐사 모델링)

  • Jang, Hangilro;Nam, Myung Jin;Cho, Sung Oh;Kim, Hee Joon
    • Geophysics and Geophysical Exploration
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    • v.20 no.3
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    • pp.121-128
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    • 2017
  • Interpretation of time-domain electromagnetic (TEM) data has been made mostly based on one-dimensional (1-D) inversion scheme in Korea. A proper interpretation of TEM data should employ 3-D TEM forward and inverse modeling algorithms. This study developed a 3-D TEM modeling algorithm using a finite difference time-domain (FDTD) method with staggered grid. In numerically solving Maxwell equations, fictitious displacement current is included based on an explicit FDTD method using a central difference approximation scheme. The developed modeling algorithm simulated a small-coil source configuration to be verified against analytic solutions for homogeneous half-space models. Further, TEM responses for a 3-D anomaly are modeled and analyzed. We expect that it will contribute greatly to the precise interpretation of TEM data.

Molecular divergence of the fish somatomedins: the single family of insulin­like growth factor (IGF)-I and -II from the teleost, flounder

  • Kim Dong Soo;Kim Young Tae
    • Fisheries and Aquatic Sciences
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    • v.1 no.2
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    • pp.227-231
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    • 1998
  • The teleosts represent ancient real-bony vertebrates in phylogeny and resemble major genetic patterns to higher vertebrates. In the present study, we have defined the single family of insulin-like growth factors (IGFs) from flounder (Paralichthys olivaceus), compared to the prototype of IGFs observed in the Agnathan hagfish. In flounder, IGFs are clearly diverged into two major types including type I and II, and they are structurally similar by displaying a multidomain structure consisting of five functional regions as previously found in other vertebrates. However, flIGF-I appears to be more basic (pI 8.03) than the flIGF-II (pI 5.34) in the fully processed form for the B to D domain region. The flIGF-I seems to contain an evolutionary conserved Asn-linked glycosylation in E domain, which is not found in flIGF­II. The most interesting feature is that flIGF-II appeared to be structurally close to hagfish IGF in secondary structures, particularly in Band D domains. This could tell us an idea on the molecular divergence of IGFs from the Agnatha to teleosts during the vertebrate phylogeny. It also support, in part, a notion regarding on how IGF-II is appeared as more embryonic during development. Nonetheless, the biologically active B to D domain region of flIGF-II shows significant sequence homology of $65.6\%$ to flIGF-Is and contains the evolutionary conserved insulin-family signature, as well as a reserved recognition site (Lys) in D domain, necessary to generate proteolytic cleavage for E-peptide. A significant structural difference was found in E domain in which flIGF-I possesses two potential alternative splicing donor site at $Val^{17,\;24}$ of E domain. Therefore, it seems so far that IGF-I sorely produces spliced variants due to the spliced E-peptide moiety while IGF-II appears to be maintained in a single type during evolution. IGF-II, however, may be also possible to transcribe unidentified variants, depending on the physiological conditions of tissues in vertebrates in vivo.

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MD-TIX: Multidimensional Type Inheritance Indexing for Efficient Execution of XML Queries (MD-TIX: XML 질의의 효율적 처리를 위한 다차원 타입상속 색인기법)

  • Lee, Jong-Hak
    • Journal of Korea Multimedia Society
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    • v.10 no.9
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    • pp.1093-1105
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    • 2007
  • This paper presents a multidimensional type inheritance indexing technique (MD-TIX) for XML databases. We use a multidimensional file organization as the index structure. In conventional XML database indexing techniques using one-dimensional index structures, they do not efficiently handle complex queries involving both nested elements and type inheritance hierarchies. We extend a two-dimensional type hierarchy indexing technique(2D-THI) for indexing the nested elements of XML databases. 2D-THI is an indexing scheme that deals with the problem of clustering elements in a two-dimensional domain space consisting of the key value domain and the type identifier domain for indexing a simple element in a type hierarchy. In our extended scheme, we handle the clustering of the index entries in a multidimensional domain space consisting of a key value domain and multiple type identifier domains that include one type identifier domain per type hierarchy on a path expression. This scheme efficiently supports queries that involve search conditions on the nested element represented by an extended path expression. An extended path expression is a path expression in which every type hierarchy on a path can be substituted by an individual type or a subtype hierarchy.

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