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.

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.

망 관리를 위한 관계관리 기능 모델의 설계 및 구현

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

표면개질 실리카막을 이용한 CO_2 선택투과분리

김성수,최현교,박홍채,김태옥,서봉국 한국환경과학회 2000 한국환경과학회지 Vol.9 No.4

To improve CO_2 permselectivity, a modified silica membrane was prepared by chemical vapor deposition with tetraethoxysilane(TEOS)-ethanol-water, and TEOS-ethanol-water-HCI solution at 300-600℃. The silica was effectively deposited in the mesopores of a γ-alumina film coated on a porous α-alumina tube by evacuating the reactants through the porous wall. In this membrane, CO_2 interacts, to some extent, with the pore wall, and CO_2/N_2 selectivity then exceeds the value of the Knudsen diffusion mechanism, while the membrane derived from TEOS alone has no CO_2 selectivity. The silica membrane prepared from TEOS-ethanol-water-HC1 solution showed that CO_2 permeance was 2.5×10 exp (-7)㏖/s^-1. m^-2. Pa^-1 at 30℃ and CO_2/N_2 selectivity was approximately 3. The CO_2 permeance and selectivity was improved by enlarging the surface diffusion with modification of chemical affinity of the silica pores.

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.

백서 정중구개봉합 확대후의 CGRP 면역반응 신경섬유의 변화

김보경,박국필,경희문,권오원,성재현 대한치과교정학회 1999 대한치과교정학회지 Vol.29 No.1

측방확대장치에 의한 정중구개봉합부의 확대시 고정력은 구개부의 신경요소들에 변화를 일으키면서 동통을 유발하게 되고 구개봉합부가 확대되고 그것이 유지되는 동안에 기계적 자극에 의한 구개부신경섬유의 반응성에 변화를 일으킬 것으로 생각된다. 본 연구에서는 백서 정중구개봉합부의 CGRP 면역반응 신경섬유의 교정력 적용시간에 따른 형태학적인 반응성, 밀도, 분포변화등을 관찰하고 그와 연관된 CGRP의 기능을 알아보고 자 250gm내외의 Sprague-Dawley 웅성백서 상악전치에 200gm의 치아이개력이 가해지도록 활성화시킨 helical spring을 삽입하여 정상대조군과 장치 장착후 경과시간에 따라 1일, 4일, 7일, 14일 경과군으로 나누어 정중구개봉합부를 확대후 희생시켜 면역조직화학법으로 염색하여 관찰하였다. · 대조군에서 정중구개 봉합붑 결합조직의 CGRP 면역양성 신경섬유는 거의 관찰되지 않았다. · 1일군에서는 대조군에 비해 CGRP 면역반응 신경섬유가 현저한 증가를 보였으며 주로 혈관 주위에 염주알 모양의 가는 신경섬유가 관찰되었다. · 4일군에서는 CGRP 면역반응 신경섬유가 대조군에 비해서는 현저한 증가를 보였으나 1일군에 비해서는 크게 증가하지 않았으며 혈관의 크기가 훨씬 확장되어 관찰되었다. · 7일군에서는 특징적으로 조골양세포가 새로이 형성된 골변연을 따라 줄지어 배열되는 독특한 양상이 관찰되었고 신경섬유의 수는 4일군에 비하여 감소하고 혈관의 직경도 감소되었다. · 14일군에서는 CGRP 면역반응 신경섬유가 7일군과 유사한 분포를 보였으며 확대에 의한 골변연의 불규칙성도 대체로 감소되었다. CGRP 면역반응 신경섬유는 정중구개봉합의 확대시 초기에 일어나는 신경원성 염증반응에 주로 관련되어 증식되는 것으로 생각된다. Midplatal suture expansion is often used for patients having narrow maxillary arch, cleft palate, respiratory handicap with narrow nasal cavity. CGRP has been known as a modulator of pain transmission in central nervous system and a local effector to peripheral tissue causing vasodilation, increase of blood flow, modulation of immune system, regulation of macrophagic function and stimulation of bone formation. To investigate changes of CGRP-immunoreactive nerve fibers in midpalatal suture during the the expansion, immunohistochemical study was performed by using rats. Experimental rats(10weeks, 250gm) were divided into five groups(control, 1, 4, 7, 14 days group (each n=4) and applied orthodontic force (approximately 200gm) to upper anterior incisors. Frozen sections of midpalatal suture area were immunostained by using rabbit antisera. The results were as follows. · The CGRP-immunoreactive nerve fibers were hardly observed in control group. · In 1 day group, the CGRP-immunoreactive nerve fibers were more increased around the vessels than control group. · In 4 days group, the CGRP-immunoreactive nerve fibers were more increased than control group, but not more increased than 1 day group. Vascular diameter was more enlarged. · In 7 days group, expecially, hematoxilin affinity of cells was remarkable and cells were arranged along the bone margin. The CGRP-immunoreactive nerve fibers were more reduced than 4 days group and vascular diameter was also reduced. · In 14 dayds group, the CGRP-immunoreactive nerve fibers were similar to those of 7 days group and the irregularity of bone margin was almost recoverd. In Conclusion, the CGRP-immunoreactive nerve fibers may be related to initial neurogenic inflammatory reaction in expanding mid-palatal suture.

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.