• 한국콘텐츠학회논문지
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• 제8권1호
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• pp.195-202
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• 2008

식별체계를 활용한 참조연계 서비스가 해외는 물론 국내에서도 각 분야에서 본격적으로 활성화되고 있다. 국가 R&D정보는 국가 R&D사업의 과제, 참여인력, 연구개발 결과로 산출되는 성과, 연구 장비 등에 관한 정보이다. 전 부처의 모든 국가 R&D정보에 식별체계를 부여하고 과제와 관련된 성과, 과제의 참여 연구원 정보, 과제와 관련된 장비, 성과와 관련된 인력정보 등 정보간 관련 연계정보를 검색없이 바로 링크해서 볼 수 있도록 하는 참조연계서비스는 연구자들에게 매우 유용하다. 본 논문에서 개발한 식별체계 기반의 국가 R&D정보 참조연계서비스 시스템을 통해 국가 R&D정보의 동종 및 이종 정보간 정보연계를 더욱 활성화하는 계기가 될 것이다.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.172-177
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• 2007

식별체계를 활용한 참조연계 서비스가 해외는 물론 국내에서도 각 분야에서 본격적으로 활성화되고 있다. 국가 R&D정보는 국가 R&D사업의 과제, 참여인력, 연구개발결과로 산출되는 성과, 연구 장비 등에 관한 정보이다. 전 부처의 모든 국가 R&D정보에 식별체계를 부여하고 과제와 관련된 성과, 과제의 참여연구원 정보, 과제와 관련된 장비, 성과와 관련된 인력정보 등 정보간 관련 연계정보를 검색없이 바로 링크해서 볼 수 있도록 하는 참조 연계서비스는 연구자들에게 매우 유용하다. 본 논문에서 개발한 식별체계 기반의 국가 R&D정보 참조연계서비스 시스템을 통해 국가 R&D정보의 동종 및 이종 정보간 정보연계를 더욱 활성화하는 계기가 될 것이다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제3권5호
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• pp.444-460
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• 2009

In this paper, we propose an expanded patching technique in order to reduce the server network bandwidth requirements to support true VoD services in VoD Systems. Double Patching, which is a typical multicast technique, ensures that a long patching stream delivers not only essential video data for the current client but also extra video data for future clients. Since the extra data may include useless data, it results in server network bandwidth wastage. In order to prevent a server from transmitting useless data, the proposed patching technique uses a new kind of stream called a linking stream. A linking stream is transmitted to clients that have received short patching streams, and it plays a linking role between a patching stream and a regular stream. The linking stream enables a server to avoid transmitting unnecessary data delivered by a long patching stream in Double Patching, so the server never wastes its network bandwidth. Mathematical analysis shows that the proposed technique requires less server network bandwidth to support true VoD services than Double Patching. Moreover, simulation results show that it has better average service latency and client defection rate compared with Double Patching.

• Carbon letters
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• 제16권1호
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• pp.62-66
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• 2015

In this study, carbonized fibers were prepared by using acidically cross-linked LDPE fibers. The surface morphologies of the carbonized fibers were observed by SEM. The effects of cross-linking process temperatures were studied using thermal analyses such as DSC and TGA. The melting and heating enthalpy of the fibers decreased as the cross-linking temperature increased. The cross-linked fibers had a carbonization yield of over 50%. From SEM results the highest yield of carbonized LDPE-based fibers was obtained by cross-linking at a sulfate temperature ($170^{\circ}C$). As a result, carbonation yield of the carbonized fibers was found to depend on the functions of the cross-linking ratio of the LDPE precursors.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.139-142
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• 2008

Construction Management by using 4D CAD system analyzes operations information based on 3D and 4D objects. But it is difficult to provide a variety of documents linked by 4D objects in a lump from 4D CAD system based on visual object, and to get an optimal decision-making information to conduct business. Therefore, it is necessary to construct effective construction information management systems and to organize integrated information through linking non-objects to objects. This study suggests methodologies of effective construction management for railway facilities through building of framework for practical application and methodologies to link 4D objects to IETM documents. Accordingly, it is possible to establish a systematic decision-making for an effective construction management of railway facilities, and this provide integrated methodology for linking non-objects to objects.

• Journal of Microbiology and Biotechnology
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• 제8권6호
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• pp.696-699
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• 1998

Biological oxidation of D-sorbitol to L-sorbose using permeated and immobilized cells of Gluconobacter suboxydans was carried out to investigate the optimum reaction condition. The stabilization effect of cross-linking agents such as glutaraldehyde, tannic acid, and polyethylene imine to prevent the leakage of enzymes from beads containing permeated and immobilized cells of G. suboxydans was examined by the production of L-sorbose from the mixture of D-sorbitol and gluconic acid. The protein concentration effused from immobilized beads treated with only glutaraldehyde was $5.2\mug/m\ell$ after 20 h. The beads of G. suboxydans immobilized with alginate and cross-linked with 0.3% glutaraldehyde was the most useful for the oxidation of D-sorbitol to L-sorbose.

• Animal cells and systems
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• 제8권2호
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• pp.125-133
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• 2004

We have extended our previous work that cross-linking CD4 molecules using specific MAb induced antigen nonspecific, MHC unrestricted killing of virally infected target cells by CD$4^+$We have extended our previous work that cross-linking CD$4^+$ molecules using specific MAb induced antigen nonspecific, MHC unrestricted killing of virally infected target cells by CD$4^+$ T cells. The killing activity of antibody activated CD$4^+$T cells was completely blocked by herbimycin A, a protein tyrosine kinase (PTK) inhibitor, but not by bisindolylamaleimide, a protein kinase C (PKC) inhibitor. Herbimycin A treated human or bovine peripheral blood CD$4^+$T cells lacked PTK activity and failed to kill virally infected target cells even after cross-linking of CD4 molecules. The CD$4^+$cross-linking failed to induce effector cell proliferation or the transcription of TNF${\beta}$ Upregulation of TNF${\beta}$ was induced by incubating the antibody activated effector cells with BHV-1 infected D17 target cells for 10 h. Anti-TNF${\beta}$ antibody partially abolished (13-44%) the direct effector cell-mediated antiviral cytotoxicity. However, this antibody neutralized 70 to 100% of antiviral activity of effector and target cell culture supernatants against BHV-1 infected D17 cells. The inhibition level of the antiviral activity by the antibody was dependent on the effector and target cell ratio. These results support the hypothesis that increased p$56^ICK enzyme activity in effector cells transduces a signal critical for effector cell recognition of viral glycoproteins expressed on the target cells. Following target cell recognition, lytic cytokines known to participate in target cell killing were produced. A better understanding of the killing activity displayed by CD$4^+$T lymphocytes following surface receptor cross-linking will provide insight into the mechanisms of cytotoxic activity directed toward virally-infected cells.T cells. The killing activity of antibody activated CD$4^+$T cells was completely blocked by herbimycin A, a protein tyrosine kinase (PTK) inhibitor, but not by bisindolylamaleimide, a protein kinase C (PKC) inhibitor. Herbimycin A treated human or bovine peripheral blood CD4T cells lacked PTK activity and failed to kill virally infected target cells even after cross-linking of CD4molecules. The CD4 cross-linking failed to induce effector cell proliferation or the transcription of TNF$\beta$. Upregulation of TNF$\beta$ was induced by incubating the antibody activated effector cells with BHV-1 infected D17 target cells for 10 h. Anti-TNF$\beta$ antibody partially abolished (13-44%) the direct effector cell-mediated antiviral cytotoxicity. However, this antibody neutralized 70 to 100% of antiviral activity of effector and target cell culture supernatants against BHV-1 infected D17 cells. The inhibition level of the antiviral activity by the antibody was dependent on the effector and target cell ratio. These results support the hypothesis that increased $56^ICK enzyme activity in effector cells transduces a signal critical for effector cell recognition of viral glycoproteins expressed on the target cells. Following target cell recognition, lytic cytokines known to participate in target cell killing were produced. A better understanding of the killing activity displayed by CD$4^+$T lymphocytes following surface receptor cross-linking will provide insight into the mechanisms of cytotoxic activity directed toward virally-infected cells.

• 한국CDE학회논문집
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• 제11권5호
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• pp.375-383
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• 2006

Presented in this paper is a new fast and robust algorithm generating NC tool path for 2D pockets with islands. The input shapes are composed of line segments and circular arcs. The algorithm has two steps: creation of successive offset loops and linking the loops to a tool path. A modified pairwise technique is developed in order to speed up and stabilize the offset process, and the linking algorithm is focused on avoiding thin-wall cutting and minimizing tool retractions. The proposed algorithm has been implemented in C++ and some illustrative examples are presented to show the practical strength of the algorithm.

• 대한수학교육학회지:학교수학
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• 제18권2호
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• pp.323-348
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• 2016

2009 개정 교육과정에서는 공간 감각의 향상을 위해 초등학교 6학년 수학 교과서에 '연결큐브'를 사용한 활동을 새롭게 도입하고 의사소통과 구체적 조작을 통한 교수 학습 방법을 강조하였다. 교사들을 대상으로 한 설문과 면담 분석 결과 공간 대상에 대한 표현 체계의 부재로 연결큐브 수업의 문제해결과 의사소통 측면에서 교사가 지도하는데 많은 어려움이 있음을 확인하였다. 본 연구에서는 이런 어려움을 해소하기 위한 대안으로 '거북표현체계'를 제시하고, 교사를 대상으로 설문과 검사를 실시하였다. 그 결과 문제해결과 의사소통 측면에서 거북표현체계의 효과와 유용성을 확인할 수 있었다.

• 한국CDE학회논문집
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• 제9권4호
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• pp.286-293
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• 2004

Recently, hot processing using the heat source like laser machining and RFS was developed and spreaded gradually. In order to generate tool-path for the proper hot tool, a new tool-path linking algorithm is needed because tool-path linking algorithm for machining can't be applied. In this paper, zigzag tool-path liking algorithm was proposed to generate tool-path automatically for RFS. The algorithm is composed of three steps: 1) Generating valid tool-path element, 2) Storing tool-path elements and creating sub-groups, 3) linking sub-groups. Using the proposed algorithm, CAD/CAM software for the tool-path generation of hot tool was developed. The proposed algorithm was applied and verified for Venus's face and die of cellular phone case.