Investigation of Application for ELCIRC (Eulerian-Lagrangian CIRCulation) Model

김현승(Hyun-Seung Kim),강영승(Yung-Seung Kang),김국진(Kuk-Jin Kim3) 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6

폐흡충증으로 확진된 고립성 폐결절 1예

유영권,김규식,김윤현,나국주,김경수,임성철,김영철,박경옥 全南大醫大 2001 전남의대학술지 Vol.37 No.2

혼합 식물추출물에 대한 차응애의 감수성 검정

김창승(Chang Seung Kim),김도익(Do Ik kim),국용인(Yong In Kuk),현규환(Kyu Hwan Hyun),김상수(Sang Soo Kim1) 한국차학회 2016 한국차학회지 Vol.22 No.1

The acaricidal activity of the mixed plant extracts of Gleditsia japonica var. koraien, Camellia sinensis, Cinnamomum cassia, and Lantana camara, toward the tea red spider mite, Tetranychus kanzawai Kishida was evaluated in laboratory bioassays. Treatments with mixtures 1 and 3 were effective against the adult females of T. kanzawai and yielded 87.0 and 85.6% adulticidal activity at 7 days after treatment, respectively. Mixture 3 revealed 78.7% adulticidal activity. However, mixtures 4 and 5 had lower adulticidal activity than the other treatments. The adult females of T. kanzawai treated with mixtures 1 and 3 produced only 22.5-22.8% as many eggs as did the control females. The residue of the plant extracts tested had low adulticidal activity (16.3-27.2%). All of the plant extracts tested were ineffective against the eggs of T. kanzawai. Treatments with mixtures 1 and 3 were effective against the nymphs of T. kanzawai and led to emergence rates of 20.7 and 25.3%, respectively. These results suggest that mixtures 1 and 3 might be used for the control of T. kanzawai.

아동들의 태권도 수련활동참가에 따른 열등감 및 자아존중감의 관계

정재엽,정국현,김지영,김현철,이용국 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The purpose of this study was to identify the relationship between children's Inferiority and self-esteem during Taekwondo practice. In order to achieve this purpose, 480 subject were selected among participants of Taekwondo activity programs in the Seoul area by using the stratified cluster random sampling method. Out of the 480 questionnaires responded to. only 414 were used for data analyses because 66 were responded to incompletely or incorrectly. The instrument for data collection was a questionnaire in which Inferiority and self-esteem consisted of items identified by Jun(1999) and Jun(1993), respectively. The statistical methods utilized in the study for analyzing the collected data were reliability analysis, descriptive statistics, one-way ANOVA, standard multiple regression analysis and the following results were obtained: First, both Inferiority and self-esteem differ statistically and significantly according to both sociodemographic variables. Second, both Inferiority and self-esteem differ statistically and significantly according to Taekwondo practice. Third, Inferiority statistically and significantly influences self-esteem.

炭素鋼의 摩擦熔接에서 熔接面의 形狀에 관한 硏究

鞠賢雨,閔宅基,金光日,金茂成 忠南大學校 産業技術硏究所 1994 산업기술연구논문집 Vol.9 No.2

This report deals with a study on figure of friction welding of carbon steel. It is investigated to vary figure. Main result obtained in this study are as follows; 1) In friction welding of carbon steel, the optimization of figure experiments on several type [C(120 )>A(180 )>B(150 )>D(90 )type]. The optimization of figure is C-type(120 ) 2) The tensile strength under 1.0-1.4sec heating time is shown 43.2kgf/㎟, which is the higher than base metal (42kgf/㎟) in C-type. 3) The horizontal hardness is similar to base metal. Heat affected zone where hardness is lower than base metal spreads 3mm far from the friction weld interface in C-type

망 관리를 위한 관계관리 기능 모델의 설계 및 구현

김보현,김규호,이재오,조국현 한국정보과학회 1993 한국정보과학회 학술발표논문집 Vol.20 No.2

OSI 자원의 효율적인 관리를 위한 성능 관리 모델과 구현

김규호,조국현 한국정보과학회 1997 정보과학회논문지 : 시스템 및 이론 Vol.24 No.8

OSI 구조의 망 관리하에서 많은 노드들이 복잡하고 다양하게 연결됨에 따라 ISO에서는 통신망을 효율적으로 관리하기 위해 OSI 관리 표준안을 제시하고 있다. 본 논문에서는 OSI 망구조에서 응용계층에 해당하는 관리 기능 서비스분야중 최근 활발히 표준화 작업이 수행되고 있는 성능 관리에 대한 표준안을 검토하여 효율적인 구현 모델을 제시했다. 한편, 일반적으로 망의 성능은 경로 설정, 대역폭, 각종 타이머등과 같은 다양한 파라메타에 따라 달라진다. 이러한 파라메타의 설정은 설계나 운영상에서 시스템의 효율성이나 안정화 관점에서 적절히 선택하여 적용한다. 그러나, 링크나 노드의 장애, 트래픽 폭주등과 같은 네트워크 환경에 동적으로 적용하기에는 많은 어려움이 야기된다. 이러한 동적인 변화는 망의 제어와 관리를 통하여 망자원의 파라메타를 변경시킴으로써 성능을 향상 시킬 수 있다. 본 연구에서는 이러한 프로토콜 파라메타와 망의 성능 사이의 관계를 이용하여 전반적인 성능 향상을 위한 성능 관리 모델을 제시한다. 본 논문에서는 실험적 구현을 위하여 ISODE(ISO Development Environment)를 이용하여 구현 환경을 설정하였으며, 특히 관리 자원으로 ATM 망의 경로 설정 파라메타와 대역폭 변경 파라메타가 성능에 영향을 미치는 정도를 조사하여 효율적인 성능관리 구현 모델을 제시했다. Because a number of nodes connect to each other with complexity and variety, ISO has proposed OSI Management Standard for achieving the network management efficiently. In this study, OSI Standards on Performance Management of the management service which is laid in application layer were reviewed and an efficient implementation model is proposed. The performance of the computer network may differ according to various parameters such as routing, bandwidth and timers. Since the network system requirements may vary widely according to specific application, computer network must be tailored at the design stage by the selection of appropriate protocols and the assignment of default parameter. However, since the condition under which network actually operates may change from that considered at the design stage, control and management action are required to adjust the network parameter so that the performance of network is satisfied. This paper presents the design of a performance management model for improving network performance by on -line adjustment of protocol parameters such as routing table, bandwidth. And case study of implementation on ATM network topology is presented.

열응답성 나노복합재료의 합성과 LCST에서의 열적특성

김정필,최현국,서길수 영남대학교 공업기술연구소 1999 工業技術硏究所論文集 Vol.27 No.2

Thermal responsive nanocomposite were synthesized by copolymerization of N-isopropyl acrylamide and methylene bisacrylamide(crosslinking monomer) in an aqueous suspension of MAPTC-montorillonite at room temperature. Hydrogels containing 2.0 ∼5.0wt% of montmorillonite exhibited a lower critical solution temperature(LCST) similar to unmodified PNIPAM hydrogel (approximately 33.7℃). However, hydrogels containing 10wt% montmorillonite did not exhibit a measurable LCST. TGA result shows thermal stability of thermal responsive nanocomposite imoroved a little more than the thermal responsive polymer.

숯 처리에 의한 녹차 추출액 중 질산태질소 제거 효과

김진우,고영옥,신동국,이 협,전현식,이종옥 진주산업대학교 산업과학기술연구소 2005 산업과학기술연구소보 Vol.- No.12

This experiment was carried out to measure the elimination effect of nitrate nitrogen from green tea extracts through the column system filled with charcoal activated and bamboo charcoal powder compare to that of an nitrate nitrogen standard solution prepared with KNO3 chemicals. The change patterns of pH, and the amount of removed nitrate nitrogen from green tea and nitrate nitrogen standard solution were analyzed according to time course and the amount of charcoal treatments. The results were summarized as follow: 1. pH The pH of Green tea extractions treated with charcoal was high up to 8.17(after 30min treated with 0.4% charcoal) and 8.36(after 60min with 0.4% charcoal) which pH of non-treated green tea (control) was 5.8 The results indicated that the pH values were variable to the treated amount of charcoal and the teated time course. 2. Nitrate nitrogen From the nitrate nitrogen standard solution, the least rate 69.1% and the highest rate 74.5% of nitrate nitrogen were observed to be absorbed through the column treatment (60 min), which with green tea extract solution 21.3% (the least) and 43.8% (the highest) were detected to be absorbed through column treatment (after 60min with 0.4% charcoal). In the case of bamboo treatments with nitrate nitrogen solution samples were showed the least rate 62.8% (30min with 0.1% bamboo) and the highest rate 68.9% (60min with 0.4% bamboo), and with green tea extract solution were observed the least 13.6 (30min with 0.1% bamboo) the highest rate 29.4% (60min with 0.4% bamboo). In general, the elimination activity of nitrate nitrogen was higher by the charcoal activated powder treatment than bamboo charcoal.

수학 기피요인의 설정 및 기피성향의 분석도구 개발

김영국,박기양,박규홍,박혜숙,박윤범,유현주,권오한,이선아 西原大學校 基礎科學硏究所 2003 基礎科學硏究論叢 Vol.17 No.-

To lessen the ratio of under achievers is one of the most urgent task which recent school mathematics education is confronted with. To cope with this problem efficiently, math. teachers should know more specifically and concretely the causes that make the students dislike mathematics. But actually, there are too many reasons for these situations. So, in this paper, we tried to devise a tool to analyze and measure each student's math. disliking status. We proceeded this research via the following procedures. 1. Grasping the causes which make the students dislike mathematics as specifically as possible. To obtain this, we asked more than 300 of secondary school students to write down their thoughts about school mathematics. 2. Analyzing the responses, we abstracted 74 numbers of items which were supposed to be the causes for secondary school students' mathematics disliking. 3. With these items we made a test to measure students' aptitude for each item. 4. With this test paper, we tested over 800 of secondary school students. Through factor analysis and theoretical argument, we categorized the 74 items into 11 groups whose names were defined as factors of mathematics disliking. 5. For each of these 11 factors, we developed a norm which could serve as standard of comparison in measuring each student's mathematics disliking status. Using this tool teachers were able to describe each student's traits of mathematics disliking more specifically.