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Generation of Discrete Bicubic G^1 B-Spline Ship Hullform Surfaces from a Given Curve Notwork Using Virtual Iso-Parametric Curves

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Journal of Computer Science & Technology 2006年第2期21卷 265-271页

作者： Joong-hyun Rhim doo-Yeoun Cho Kyu-Yeul Lee Tao-Wan kim EzGragh Co.Ltd.Seoul 135-080 Koren Department of Naval Architecture & Ocean Engincering Seoul National UniversitySeoul 151-744Korea Department of Naval Architecture & Ocean Engincering and Research Institute of Macine Systems Engineering Seoul National University Seoul 151-744Korea

We propose a method that automatically generates discrete bicubic G^1 continuous B-spline surfaces that interpolate the curve network of a ship ***,the curves in the network are classified into two types;boundary curves and ＂reference curves＂,The boundary curves correspond to a set of rectangular（or triangular）topological type that can be representes with tensot-product （or degenerate）B-spline surface ***,in the interior of the patches,surface fitting points and cross boundary derivatives are estimated from the reference curves by constructing ＂virtual＂isoparametric ***,a discrete G^1 continuous B-spline surface is gencrated by a surface fitting *** smooth ship hullform surfaces generated from curve networks corresponding to actual ship hullforms demonstrate the quality of the method.

关键词： curve netowork interpotation discrete G^1 continuous B-spline surface,iso-parametric curve,ship hullform

EAFoC： Enterprise Architecture Framework Based on Commonality

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Journal of Computer Science & Technology 2006年第6期21卷 952-964页

作者： Jin-Woo kim Ju-Hum Kwo Young-Gab kim Chee-Yang Song hyun-Seok kim doo-Kwon Baik Department of Computer Science and Engineering Korea University 1 5-Ga Anam-Dong Sungbuk-Ku Seoul 136-701 Korea Department of Software Engineering Sang-Ju National University 386 Street Kajang-Dong Sang-Ju 742-711 Korea

The recent rapid development in information systems （ISs） has resulted in a critical need for integration and interoperability between heterogeneous ISs in various domains, using specific commonalities. However, stovepipe systems have been caused due to inconsistencies in planning IS architecture among stakeholders. So far, there has been no research on an enterprise architecture framework （EAF） that can satisfy with the coefficient factors of system architecture （SA） and enterprise architecture （EA）. This paper proposes a new EAF that can resolve the problems inherent in existing legacy EAFs and their features. EAFoC （Enterprise Architecture Framework based on Commonality） is based on commonality that can be satisfied as the coefficient factors in both SA and EA within a common information technology （IT） domain. Thus, it should be possible to integrate an established heterogeneous framework for each stakeholder＇s view. Consequently, the most important contribution of this paper is to establish the appropriate EAFoC for the development of consistent IS architecture, smooth communication among stakeholders, systematic integration management of diversified and complicated new IT technologies, interoperability among heterogeneous ISs, and reusability based on commonality with other platforms.

关键词： enterprise architecture (EA) enterprise architecture framework based on commonality (EAFoC) enterprise integration (El) requirements engineering process system architecture (SA)

An XPath-based OWL storage model for effective ontology management in Semantic Web environment

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第6期10卷 843-857页

作者： Jinhyung kim Dongwon JEONG doo-kwon BAIK Department of Computer Science and Engineering Korea University Department of Informatics and Statistics Kunsan National University

With the rapid growth of the Web, the volume of information on the Web is increasing exponentially. However, information on the current Web is only understandable to humans, and this makes precise information retrieval difficult. To solve this problem, the Semantic Web was proposed. We must use ontology languages that can assign data the semantics for realizing the Semantic Web. One of the representative ontology languages is the Web ontology language OWL, adopted as a recommen-dation by the World-Wide Web Consortium (W3C). OWL includes hierarchical structural information between classes or prop-erties. Therefore, an efficient OWL storage model that considers a hierarchical structure for effective information retrieval on the Semantic Web is required. In this paper we suggest an XPath-based OWL storage (XPOS) model, which includes hierarchical information between classes or properties in XPath form, and enables intuitive and effective information retrieval. Also, we show the comparative evaluation results for the performance of the XPOS model, Sesame, and the XML file system-based storage (XFSS) model, in terms of query processing and ontology updating.

关键词： XPath Web ontology language Hierarchical structure Ontology storage Semantic Web

VQT:value cardinality and query pattern based R-schema to XML schema translation with implicit referential integrity

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第12期9卷 1694-1707页

作者： Jinhyung kim Dongwon JEONG doo-Kwon BAIK Department of Computer Science and Engineering Korea UniversitySeoul 136-713Korea Department of Informatics and Statistics Kunsan National UniversityKunsan 573-701Korea

In this paper,we propose a new relational schema (R-schema) to XML schema translation algorithm, VQT, which analyzes the value cardinality and user query patterns and extracts the implicit referential integrities by using the cardinality property of foreign key constraints between columns and the equi-join characteristic in user queries. The VQT algorithm can apply the extracted implied referential integrity relation information to the R-schema and create an XML schema as the final result. Therefore, the VQT algorithm prevents the R-schema from being incorrectly converted into the XML schema, and it richly and powerfully represents all the information in the R-schema by creating an XML schema as the translation result on behalf of the XML DTD.

关键词： Value cardinality Query pattern Relational schema XML schema Implicit referential integrity relations Explicit referential integrity

Simple nanofabrication of a superhydrophobic and transparent biomimetic surface

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Chinese Science Bulletin 2009年第19期54卷 3613-3616页

作者： LIM hyuneui JUNG Dae-Hwan NOH Jung-hyun CHOI Gyeong-Rin kim Wan-doo Nano-Mechanical Systems Research Division Korea Institute of Machinery and Materials Biotech and Nanotech Division Ministry of Knowledge Economy

This paper describes a simple fabrication method for creating superhydrophobic and transparent glass surfaces that mimic natural surfaces such as lotus leaves, moth eyes or cicada wings. Nanostructured glass surfaces were created by a combination of colloidal lithography and plasma etching. A colloidal mask was formed simply by the spin coating of the polystyrene beads and with modification of the interparticle distance between the beads. The etching of the glasses was conducted by CF4 plasma. Tower-shaped nanostructures at an aspect ratio of 1:4 were treated using fluoroalkylsilane selfassembled monolayers (SAMs) to obtain the hydrophobic surfaces. The treated glass surfaces showed superhydrophobicity with a water contact angle of around 150° and a hexadecane contact angle of around 110°. Furthermore, the nanostructured glass was transparent to visible light.

关键词： 21世纪实验室进展聚苯乙烯

Influence of Nitrogen Flow Ratio on the Microstructure, Composition, and Mechanical Properties of DC Magnetron Sputtered Zr-B-O-N Films

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Journal of Materials Science & Technology 2012年第11期28卷 981-991页

作者： Tie-Gang Wang Yanmei Liu Tengfei Zhang doo-In kim KwanKHo kim

Nanocrystalline ZrB2 film and nanocomposite Zr-B-O-N films were prepared by non-reactive as well as re- active magnetron sputtering techniques, respectively. By means of X-ray diffraction analysis, electron probe microanalysis, X-ray photoelectron spectroscopy, and scanning electron microscopy, the influence of nitrogen flow ratio on the film microstructure and characteristics were investigated systematically, including the depo- sition rate, chemical compositions, phase constituents, grain size, chemical bonding, as well as cross-sectional morphologies. Meanwhile, the hardness and adhesion of above films were also evaluated by micro-indentation method and a scratch tester. With increasing the nitrogen flow ratio, the deposition rate of above films de- creased approximately linearly, whereas the contents of N and O in the films increased gradually and tended to saturation. Moreover, the film microstructure was also altered gradually from a fine columnar microstructure to a featureless glass-structure. As the nitrogen flow ratio was 11.7%, the Zr-B-O-N film possessed an typical nanocomposite structure and presented good mechanical properties. During the process of reactive sputtering of metal borides, the introduction of nitrogen can show a pronounced suppression of columnar grain growth and strong nanocomposite structure forming ability.

关键词： Films DC magnetron sputtering Nanocomposite Microhardness Adhesion

Ileal angiomyolipoma manifested by small intestinal intussusception

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World Journal of Gastroenterology 2009年第11期15卷 1398-1400页

作者： Chang Ho Lee Jong Hun kim doo hyun Yang Yong Hwang Myoung Jae Kang Young Kon kim Min Ro Lee Department of Surgery Chonbuk National University Medical SchoolJeonju 561-180 South Korea Department of Pathology Chonbuk National University Medical SchoolJeonju 561-180 South Korea Department of Radiology Chonbuk National University Medical SchoolJeonju 561-180South Korea

Angiomyolipomas(AMLs),a form of benign mesenchymal hamartoma,arise primarily in the kidneys of patients with or without tuberous ***-renal AMLs are very rare and are most commonly found in the liver. AMLs of the small intestine are exceedingly ***, a case of a 28-year-old man,who presented with ileal intussusception caused by ileal AML is *** clinicopathological and immunohistochemical findings of ileal AMLs are discussed and the literature on small intestinal AMLs is reviewed.

关键词： Angiomyolipoma Intussusception Hamartoma Ileum Colectomy

Surface properties of Al-doped ZnO thin film before and after CF_4/Ar plasma etching

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Plasma Science and Technology 2022年第7期24卷 194-200页

作者： Young-Hee JOO Gwan-Ha kim doo-Seung UM Chang-Il kim School of Electrical and Electronics Engineering Chung-Ang UniversitySeoul 06974Republic of Korea Department of Semiconductor Materials and Applications Korea PolytechnicSeongnam 13122Republic of Korea Department of Electrical Engineering Sejong UniversitySeoul 05006Republic of Korea

Al-doped ZnO(AZO) is considered as an alternative to transparent conductive oxide *** and achieving a stable surface are important challenges in the development and optimization of dry etching processes, which must be overcome for the application of AZO in various devices. Therefore, in this study, the etch rate and surface properties of an AZO thin film after plasma etching using the adaptive coupled plasma system were investigated. The fastest etch rate was achieved with a CF_(4)/Ar ratio of 50:50 sccm. Regardless of the ratio of CF_(4) to Ar,the transmittance of the film in the visible region exceeded 80%. X-ray photoelectron spectroscopy analysis of the AZO thin film confirmed that metal-F bonding persists on the surface after plasma etching. It was also shown that F eliminates O vacancies. Consequently, the work function and bandgap energy increased as the ratio of CF-4 increased. This study not only provides information on the effect of plasma on AZO thin film, but identifies the cause of changes in the device characteristics during device fabrication.

关键词： Al-doped ZnO plasma etching F-based plasma surface characteristics X-ray photoelectron spectroscopy ultraviolet photoelectron spectroscopy

Comparative assessment of physicochemical properties of unripe peach(Prunus persica) and Japanese apricot(Prunus mume)

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Asian Pacific Journal of Tropical Biomedicine 2014年第2期4卷 97-103页

作者： Hye-Ryun kim II-doo kim Sanjeev Kumar Dhungana Mi-Ok kim Dong-hyun Shin Division of Plant Biosciences.School of Plant Biosciences Kyungpook National UniversityDaegu 702-701.Korea Institute of Agricultural Science and Technology Kyungpook national universityDaegu 702-701.Korea Department of Hotel Restaurant.Culinary ArtsDaegu Health CollageDaegu 702-722.Korea

Objective:To investigate the physicochemical properties of unripe peach-Pruuns persica ***(Mibaekdo) and Prunus persica *** Hakuho(Nagasawa Hakuho) as an alternative to fowl supplement while Japanese apricot(Prunus mume ***)(Backaha) was used as a control ***:The unripe fruits were analyzed for soluble solid(Brix).titratable ***,total polyphenol content,1,1-diphenyl-2-pierylhydrazyl(DPPH) radical scavenging activity,amygdalin content,free amino acid content,organic acid content,free sugar content,and α-amylase ***:Total polyphenol content of unripe peach ranged between 137.27-151.64 μg/g whereas that of apricot was 160.73 μg/*** radical scavenging activities of Rackaha was the highest189.16%.) followed by Mibaekdo(85.03%) and Nagasawa Hakuho(41.30%).The highest amount of oxalic acid 1612.8 mg/100 g) was observed in Mibaekdo while that of Nagasawa llakuho and Backaha were(184.6±18.1) and(334.8±16.1) mg/100 g,*** contents of *** Hakuho and Backaha were 486.61,548.60 and 174.28 μg/g,***:The results suggest that the unripe fruit of peach has a significant biochemical potential of using as a food supplement with potential health benefit for human health.

关键词： Amygdalin Japanese apricot(Backaha) Physicochemical properties Unripe peach(Mibaekdo Nagasawa Hakuho)