• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2003년도 학술.기술논문 발표회
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• pp.43-48
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• 2003

This paper investigate that the effect of the concrete containing mineral admixtures(pozzolanic materials such as fly-ash, ground granulated blast-furnace slag, silica fume and meta kaolin) on the resistance properties to chloride ion invasion. The purposed testing procedure was applied to the concrete added mineral admixtures for 3~4 replacement ratios under W/B ratios ranged from 0.40 to 0.55. For the electrical migration test, Tang and Nilsson's method was used to estimate the migration coefficient of chloride ion. As a results, the W/B ratios, kinds of admixture and replacement ratios, water curing periods had a great effect on the migration coefficient of chloride ion, and the optimal replacement ratios of admixture had a limitation for each admixtures. Also, the addition of mineral admixtures by mass(replacement of OPC) enhanced the resistance of the mixture to chloride penetration compared with the plain concrete. The amount of acid soluble chloride ions and water soluble chloride ions were varied with the kinds of mineral admixtures. The compressive strength was shown related to the migration coefficient of chloride ion, the compressive strength increased with the decreasing migration coefficient of chloride ion. Below the 50MPa, the variation of migration coefficient of concrete added mineral admixtures was bigger than plain concrete.

• 스마트미디어저널
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• 제3권4호
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• pp.35-40
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• 2014

바이오센서와 디지털 섬유의 개발로 생체신호를 측정할 수 있는 디지털 의류는 개인의 건강, 독거노인 관리와 스포츠 활동 등 여러 분야에서 사용할 수 있다. 본 논문은 디지털 의류를 착용하여 24시간 측정된 생체신호와 GPS 정보 기반의 사용자의 스트레스 상태, 맥박, 위치, 운동량을 분석하기 위한 데이터베이스 구조와 표준 HL7 메타모델기반의 XML 문서로 저장하는 저장소를 설계한다. 저장된 정보를 분석하여 사용자의 시간에 따른 스트레스 상태 및 운동량 등을 확인 할 수 있다. 또한, 실시간으로 사용자의 맥박, 위치, 운동 강도, 응급상황을 파악할 수 시스템이다. 본 논문은 생체신호를 수집하여 분석하는 시스템구현에 대하여 기술한다.

• 공학교육연구
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• 제4권1호
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• pp.88-98
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• 2001

이 논문은 공업 고등학교의 활성화와 효율화를 위한 새로운 모델로서 학교 자체의 독립성과 다른 학교와의 연계성을 같이 가지고 있는 지능적인 분산 포탈로서의 네트워크 모델을 제안하고 있다. 특히 실습이 많은 공업고등학교에서 동영상 화면을 가지고 있는 시뮬레이션을 무리 없이 활용하기 위해서는 자체의 인트라넷 기능을 수행하면서 필요에 따라 여러 수업 자료를 데이터 베이스로 구축하고 여러 학교가 필요한 자료들을 수업 외의 시간에 학교 데이터 베이스에 적재하여 학내 인트라넷에서 수업시간에 활용할 수 있는 방안을 언급하고 있다. 이러한 구조는 방대한 분산형 데이터 베이스의 활용과 학교 자체의 독립적인 특징을 살릴 수 있어, 물리적인 공업고등학교의 모습과 논리적인 사이버 공업고등학교의 모습이 병합될 수 있을 것이라고 제안하고 있다.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2003년도 학술.기술논문발표회
• /
• pp.43-48
• /
• 2003

This paper investigate that the effect of the concrete containing mineral admixtures(pozzaolanic materials such as fly-ash, ground granulated blast-furnace slag, silica fume and meta kaolin) on the resistance properties to chloride ion invasion. The purposed testing procedure was applied to the concrete added mineral admixtures for 3∼4 replacement ratios under W/B ratios ranged from 0.40 to 0.55. For the electrical migration test, Tang and Nilsson's method was used to estimate the migration coefficient of chloride ion. As a results, the W/B ratios, kinds of admixture and replacement ratios, water curing periods had a great effect on the migration coefficient of chloride ion, and the optimal replacement ratios of admixture had a limitation for each admixtures. Also, the addition of mineral admixtures by mass(replacement of OPC) enhanced the resistance of the mixture to chloride penetration compared with the plain concrete. The amount of acid soluble chloride ions and water soluble chloride ions were varied with the kinds of mineral admixtures. The compressive strength was shown related to the migration coefficient of chloride ion, the compressive strength increased with the decreasing migration coefficient of chloride ion. Below the 50MPa, the variation of migration coefficient of concrete added mineral admixtures was bigger than plain concrete.

• 인터넷정보학회논문지
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• 제2권4호
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• pp.25-32
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• 2001

ASIC 설계용으로 이미 개발된 여러 CAD 도구 또는 추후 개발될 CAD도구들은 고유의 기능을 가지고 있으며, 서로 다른 환경에서 상이한 방식으로 운영되는 경우가 많다. 따라서 목표하는 최종적인 결과를 도출하기 위한 작업을 수행하기 위해서는 상호 밀접한 관계가 있는 여러 CAD도구들을 하나의 시스템에 통합하여 운영할 수 있는 통합 CAD Framework의 사용이 효과적이다. 본 논문에서는 주로 Unix Shell 상에서 개발된 기존의 국내외 CAD도구들을 Unix 운영체계의 X-windows라는 규격화된 그래픽 인터페이스 상에서 통합하여 수행할 수 있게 하는 기법을 소개한다. 이를 위해 메뉴 구성 및 실행 환경 설정을 위한 각종 파일 양식과 메타 언어를 정의ㆍ개발하였으며, 성능 확인을 위해 기존에 개발되어 있던 두 가지 CAD 도구들을 제안된 CAD Framework상에 통합시킨 Prototype 시스템을 개발하고, 이를 토대로 테스트하였다.

• Bulletin of the Korean Chemical Society
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• 제35권1호
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• pp.236-242
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• 2014

Isospecific propylene polymerization behavior of meta- and para-Lewis base (E) functionalized unbridged zirconocenes ($[1-(E_n-Ph)-3,4-Me_2C_5H_2]_2ZrCl_2$, E = $NMe_2$, OMe; n = 1 or 2) was investigated under bulk conditions. Catalytic activity of the zirconocenes, and molecular weight and isotacticity of polypropylenes are found to be dependent on the position and number of the Lewis base functional groups in the zirconocenes. All the crude polypropylenes possess a broad molecular weight distribution and multi-melting transitions, indicating an involvement of multi-catalytic active species in the polymerization. The highest [mmmm] value of an isotactic portion of the polypropylenes reached 89%, which is higher than that (85%) from the well-known $C_2$-symmetric EBIZr (rac-$Et(Ind)_2ZrCl_2$) catalyst. These results support that the in situ generated, rigid rac-like cation-anion pair through the Lewis acid-base interactions between the functional groups of zirconocenes and methylaluminoxane anion is effective in the formation of isotactic polypropylene under bulk propylene polymerization conditions.

• 대한기관식도과학회지
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• 제1권1호
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• pp.151-158
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• 1995

Anaplastic carcinoma of thyroid gland account for no more than 10% of thyroid cancer, but it shows extremely poor prognosis. The purpose of this study is to review the outcome of patients with anaplastic carcinoma over the span of 5 years and to determine the patterns of clinical presentation, age, sex and other possible prognostic variables. We analyzed 30 cases of anaplastic carcinoma retrospectively from 1991 to 1995. There were 14 men and 16 women. There age ranged 33 to 75 years with a mean of 61.0 years. Sixteen patients presented with transformationqr of well differentiated carcinoma to anaplastic carcinoma, 1 with rapid in-crease in the size of long standing goiter, 8 with rapidly growing neck mass and 4 with meta static disease. Twenty-eight patients(93.3%) showed cervical lymphnode metastasis at presentation and twenty three patients(76.6%) showed laryngotracheal invasion. Nine patients (30.3%) showed distant metastasis. Treatment modalities included surgical resection, external irradiation, radioactive iodine and systemic chemotherapy. At decision making of treatment plan, we considered completeness of initial surgery, uptake rate of whole body radioactive io-dine scan, locoregional progression and distant metastasis. The median survival was 6.8 months and three cases survived beyond 12 months.

• 한국전자거래학회지
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• 제10권4호
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• pp.19-33
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• 2005

본 연구에서는 시맨틱 웹을 구성할 수 있도록 하는 지식표현, 온톨로지, 에이전트를 통해 급변하는 전자거래 환경을 극복하고 이질적이고 분산되어 있는 정보들을 통합할 수 있도록 하기 위한 방법론을 제시하고자 한다. 이를 위해 모델링의 기반이 되는 구문론적/의미론적 통합 및 에이전트의 운용방법론에 대해 논하며, 메타 모델링에 바탕을 두는 온톨로지의 구축에 중점을 두고 설명한다. IRDS (Information Resource Dictionary Standard) 프레임워크에 기반한 구조에 따라 OWL(Web Ontology Language)을 사용하여 온톨로지를 구체화하며, 프로세스 표현을 위해 PSL(Process Specification Language)-ontology의 용어들을 중간 계층으로 구성하여 차용한 예를 제시한다. 제시한 프레임워크를 통해 정보 자원들과 비즈니스 프로세스를 정의하고 공유하며 관리함으로써 중복성과 불일치성을 제거할 수 있을 것이다.

• Journal of Korean Biological Nursing Science
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• 제22권3호
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• pp.157-171
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• 2020

Purpose: The purpose of this study was to analyze the characteristics and effects of the forest therapy programs for adult patients. Methods: Six databases (PubMed, Cochrane library, CiNii, PsychoInFO, AGRICOL, EMBASE) and six domestic databases were systematically searched with language restrictions of Korean, English, and Japanese. The systematic review was based on the Preferred Reporting Items Systematic Reviews and Meta-Analysis (PRISMA) flow diagram. Results: Twenty five studies met the inclusion criteria. A systematic review identified adult patients classified as 1) disease of the circulatory system, 2) mental and behavioral disorders, 3) malignant neoplasms, 4) etc. (diabetes mellitus, chronic pain). This integrative review showed a positive effect of the forest therapy program for adult patients on physiological indices such as blood pressure, heart rate, heart rate variability, level of stress hormone, and natural killer cells as well as social·psychological indices such as the Profile of Mood States (POMS), anxiety, depression, and quality of life. Conclusion: The results of this study could be useful key principles in developing and applying the forest therapy programs in nursing intervention. Further research should be conducted to develop the forest therapy programs suitable for each patient group and measure its effectiveness.

• 한국직업건강간호학회지
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• 제13권1호
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• pp.40-47
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• 2004

Purpose: To understand the recent trend of studies for nursing job stress, we collected Korean articles about job stress of clinical nurses. Method: Seventy two articles were selected from the database of "richis", Korean journals of related academic society, and dissertation papers, which are presented from 1981 to 2002. Result: The trend shows that the number of researches for the job stress of clinical nurses are increasing from the year of 1996. Most of the researches are for dissertation papers (75.0%), have done surveys (90.3%), and used questionnaires (94.4%). The nurses who were studied have their jobs in general wards of hospitals (50.6%). And 36.1% of the researches used the tool of Kim and Gu (1984) to measure job stress. These researches focused mainly on job satisfaction, burnout and coping successively. Conclusion: As only 6 out of 72 researches examined in this study have experimental design (8.3%), it can be said that more experimental studies are needed in this area. And we might also consider to use meta-analytic techniques for further studies, because these researches have used very similar tools for the same subject.