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      • 하수 sludge 시용이 상추의 생육과 토양의 화학성 변화에 미치는 영향

        김광수,조경철,김희경,김수영,정순주 全南大學校 農業科學技術硏究所 2001 農業科學技術硏究 Vol.36 No.-

        This study was conducted to investigate the effect of sewage sludge application on the growth of lettuce and the change of chemical properties in soil. The experiment was set up with two different places from Feb. 10 through June 20 of 2000. Each treatment received 0, 1.25, 2.5, 5, 10 and 20㎏ of sewage sludge/3.3㎡. The application of the sewage sludge increased the EC, CEC, and the content of available phosphate and organic matter in soil, which resulted in the enhancement of growth characteristics in terms of the number of leaves, leaf area, and fresh and dry weight in all treatments. As lowering the soil pH(pH 6), heavy metal content increased compared with higher pH(pH 7). However, the concentration of heavy metal at pH 6 in the soil did not affect plant growth. This results demonstrated that application of sewage sludge in the soil may play an important role in improving soil chemical properties and promoting the crop growth.

      • KCI등재후보

        "Dice와 fill" 방식을 이용한 1-3 압전복합재의 제조와 횡방향 단위 크기에 따른 압전특성 평가

        김영덕,김광일,정우철,김흥락,김동수 한국비파괴검사학회 2002 한국비파괴검사학회지 Vol.22 No.4

        NDT나 의료용 영상장치에 응용되는 압전복합체는 일반적인 세라믹이나 고분자 압전재료에 비하여 많은 장점을 가진다. 이들 응용분야에서는 전기기계결합게수가 높아야 하고, 음향임피던스가 낮아야 한다. 그러나, 압전복합제의 횡방향 단위 크기가 조밀하지 못한 경우 횡방향으로 전행하는 판파에 의한 불필요한 진동이 표면에 발생하게 된다. 횡방향 단위 크기와 세라믹 체적비에 따른 압전 특성을 조사하기 위하여 PMN-PZT 세라믹과 Epofix 에폭시로 에폭시의 폭을 달리하면서 1-3 형 압전복합체를 제작하였다. 제작된 1-3형 압전복합체의 두께방향 진동모드의 전기기계결합계수, 음향임피던스는 각각 0.36~0.64, 9.8~22.7 MRayl로 나타났으며, 횡방향 단위크기가 줄어들수록 횡방향 모드 공진 주파수가 증가하였다. The piezoelectric composites had many adventages in comparison qith conventional piezoelectric ceramics and piezopolymers for ultrasonic transducers used in NDT and in medical ultrasonic imaging. The electromechanical coupling coeffucient should be high and the acoustic impedance should be low in these applications. However, the cross-coupling with spurious oscillations caused lateral spatial scale. The thickness mode electomechanical coupling coefficient of 1-3 type of piezoelectric composites were 0.36 to 0.64, and the acoustic impedance of them were 9.8 to 22.7 MRayl. The lateral resonance frequency of 1-3 type piezoelectric composites shifted to high frequency region with decreasing lateral spatial scale.

      • KCI등재

        유명산의 식물상 및 산림군락분류에 관한 연구

        김흥식,김인수,홍금희,김남영,박광서,김정유,박완근 江原大學校 森林科學硏究所 2003 Journal of Forest Science Vol.19 No.-

        2002년 3월부터 2003년 10월까지 유명산 자연휴양림을 대상으로 식물상과 산림군락구조를 조사한 결과, 관속식물이 98과 331속 570종 1아종 81변종 4품종 2교잡종으로 총 658종류로 나타났으며, 한국특산식물은 10과 14속 13종 2변종 1교잡종 총 16종류. 희귀 및 멸종위기식물은 9과 10속 11종 총 11종류, 귀화식물은 12과 22속 28종 총 28종류로 나타났다. 산림군락은 신갈나무-철쭉군목, 신갈나무-생강나무군단, 소나무-산거울군락, 잣나무-주름조개풀군락, 물푸레나무-신갈나무군락, 층층나무-신갈나무군락, 굴참나무-신갈나무군락, 싸리-신갈나무군락으로 전체 1군목, 1군단, 6군락이 분포하는 것으로 나타났다. The study was carried out to investigate the flora and community classification of forest vegetation in Mt. Yumyeong from March, 2002 to October, 2003. As a result of that, the vascular plants were 98 families, 331 genera, 570 species. 1 subspecies, 81 varieties, 4 formae, 2 hybrid, 658 taxa in all. Korean endemic plants were 10 families, 14 genera, 13 species, 2 variaties, 1 hybrid. 16 taxa in all ;, rare and endangered plants were 9 families, 10 genera. 11 species, 11 taxa in all ; naturalized plants were 12 families, 22 genera, 28 species, 28 taxa in all. The forest vegetation was classified into 1 order, 1 alliance. 6 communities : Rhododendro - Quercetalia mongolicae (Kim, 1990) Lindero - Quercion mongolicae (Kim, 1990) A. Carex humilis var. nana - Pinus densiflora Community B. Oplismenus undulatifolius - Pinus koraiensis Community C. Fraxinius rhynchophylla - Quercus mongolica Community D. Cornus controversa - Quercus mongolica Community E. Quercus variabilis - Quercus mongolica Community F. Lespedeza bicolor - Quercus mongolica Community

      • GO에 의해 유도된 培養 脊髓感覺神經細胞 독성에 대한 鎭肝熄風湯의 방어효과

        박광수,이호승,김인수,강길성,김인규,김인섭,류도곤 한국전통의학연구소 2003 한국전통의학지 Vol.13 No.1

        To evaluate the effect of Jingansikpungtang water extract on cultured mouse spinal sensory neuron which was inhibited by glucose oxidase(GO)-induced cytotoxicity, NR assay and TBARS assay for lipid peroxidation were carried out after the cultured mouse spinal sensory neuron were pre-incubated with various concentrations of Jingansikpungtang water extract for 3 hours prior to exposure of GO. GO, a oxygen radical, decreased the survival rate of the cultured mouse spinal sensory neuron cells on NR assay. Jingansikpungtang water extract have efficacy of decreasing lipid peroxidation increasing by GO in cultured mouse spinal sensory neuron. From above the results, it is concluded that Jingansikpungtang has marked efficacy as a treatment for the damages caused in the GO-mediated oxidative process.

      • 항암화학요법을 받는 암 환자에 대한 Nucare^R의 영양지지효과

        조덕연,김현수,곽상혁,강정현,김철희,배광봉,김종숙,박상준,윤환중,김삼용 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.1

        Purpose : The purpose of this study was to evaluate the effect of nutritional support with enteral liquid supplement in cancer patients receving chemotherapy for possible benefit in nutritional, immunologic and golbal function of patients. Patients and Methods : From October 1995 to February 1997, 30 advanced cancer patients receving chemotherapy were divided two roups. The Nycare group, in addition to normal diet, Nucare^R enteral supplement was given for 1week right after chemotherapy for the duration of 2 chemotherapy cycles. Control group received only normal diet without parenteral fluid supplement for 2 chemotherapy cycles. Results : Median ages were 53 end 56 years for Nucare group and Contrl group respectively. Performance scores was less than 2 by ECOG scale. All patients were stage Ⅲ or Ⅳ. The physical parameters, such as weight, arm muscle circumference(AMC) and triceps skin fold(TSF) were decreased in both groups after 2 cycles of anticancer therapy. but it was less severe in Nucare group(p<0.05). Serum transferrin was maintained in mild deficit state in Nucare group, whereas it aggravated form mild to moderate deficit in Control group(p<0.05). Serum albumin level increased in Nucare group without statistical significance. but it decreased from normal to mild deficit in Control group. Serum total protein did not change significantly in Nucare group. but in Control group, serum total protein was decreased from 7.24±0.9 to 6.52±0.5(P<0.05). Total lymphocyte count did not change significantly in both groups. Conclusion : This study shows that the nutritional support with Nucare^R was effective in the prevention of nutritional deficit status in patients receving a nticancer chemotherapy.

      • 玉胚芽油 사용시 小型디젤機關의 運轉性能에 關한 硏究

        金泰圭,鄭鳳守,黃光性,金明奎,鄭泰相,愼英喆 진주산업대학교 농업기술연구소 1991 農業技術硏究所報 Vol.4 No.-

        The purpose of this study is to figure out the engine performance of corn oil as a diesel engine fuels. corn oil-diesel fuel mixtures in 3 type proportions were tested in a single cylinder diesel test engine. The automatic and successive data for engine performance obtained by microcomputer-measuring system. The results of experiment summarized as follows 1. The viscosity reduction ratio of corn oil was approximately 80% when the temperature raised from 10℃ to 60℃. 2. The maximum torque and maximum power out were decreased with increasing of the amount of corn oil in the mixture, it was considered of the lower specific heat value of corn oil comparative to diesel fuel. 3. In view of fuel consumption and thermal efficiency tested engine with corn oil-diesel fuel blends showed better performance at heavy loads and at high speeds.

      • KCI등재후보

        실리콘 이온주입 SiO_2층의 나노결정으로 부터의 광루미네센스

        김광희,오항석,장태수,권영규,이용현 한국센서학회 2002 센서학회지 Vol.11 No.3

        실리콘 기판 위에 형성한 열산화막에 실리콘이온을 주입하고 열처리를 수행한 후, 광루미네센스(photoluminescence:PL) 스펙트럼을 조사하였다. 실리콘 이온도즈의 변화와 열처리 온도의 변화에 따른 PL스펙트럼을 조사하고, 이를 TEM과 XRD 데이터와 비교하여 분석한 결과, 광루미네센스 특성은 산화막내의 실리콘 나노결정으로부터 기인함을 알 수 있었다. 또 산화막을 1분 간격으로 습식 식각하면서 매 식각 시마다 PL스펙트럼을 관측하여 그 변화를 조사하였다. 이러한 실험을 통하여 산화막내에 분포하고 있는 실리콘 나노결정의 크기와 그 수가 PL피크 파장과 강도에 직접적으로 영향을 줌을 알 수 있었다. Photoluminescence(PL) properties of Si^+ -implanted SiO_2 film, which was thermally grown on c-Si substrate, is reported. We have compared room temperature photolurninescence (PL) spectra of the samples which was made in several kinds of implantation, subsequent annealing and SiO_2 film thickness. XRD data was correlated with the PL spectra. Silicon nanocrystals in SiO_2 film is considered as the origin of the photoluminescence. PL spectra was investigated after wet etching of the SiO_2 film by using BOE (Buffered Oxide Etchant) at every one minute. PL peak wavelength was varied as the etching is proceeded. These results indicate that the quantity and the distribution of dominant size of Si nanocrystals in SiO_2 film seem to have a direct effect on PL spectrum.

      • Al-8.7Zn-2.8Mg-2.6Cu+0.1wt.%Sc Al 합금 압출재의 시효 거동 및 기계적 성질

        김광삼,심성용,임수근,이상용 慶尙大學校 經營行政大學院 2004 工學硏究院論文集 Vol.20 No.-

        7000계 알루미늄 합금은 시효경화에 의해 기계적 성질이 크게 향상됨으로 항공기 등 수송기기의 구조재료로서 이용되고 있으며, 합금이 개발된 이후 지속적인 성능향상을 위한 연구가 진행중이다. Al 합금에 있어 Sc 첨가는 Al_(3)Sc 상의 생성에 의한 결정립 미세화 및 분산 강화에 의해 효과적으로 강도를 향상 시킬 수 있다. 따라서 본 연구에서는 Al-8.7Zn-2.8Mg-2.6Cu+0.1wt.%Sc 합금 압출제를 이용하여 시효 열처리를 실시하여 시효 거동과 기계적 성질을 조사하였으며, 열처리에 따른 기계적 성질을 조사하였다. 압출재의 미세 조직 관찰 결과 Al_(3)Sc상이 기지 전반에 압출 방향으로 분포되어 있음을 알 수 있었고, 시효 거동 관찰 결과 최대경도 지점이 2400분에서 나타났으며, 시효 경화성 또한 기존의 Al7075 합금 보다 우수하였으며, 강도 증가에 있어서도 T6 처리한 경우 인장강도 657MPa로 나타났으며, 연신율의 경우 5%이었다.

      • 의사소통 접근을 위한 통합교수요목 : 그 필요성과 몇가지 고려사항 its necessity and some considerable facts

        김광수 春川敎育大學 1985 論文集 Vol.25 No.-

        The ultimate goal of teaching language is to help the learners to get the comunicative competence with the target language. Although the 'communicatve competence' is widely accepted and has been influential in language teaching since the early 1970s, language is still taught not through communication practice, but with an analysis of language. The main reason, 1 think, has its roots in the syllabus designing, because a syllabus is a statement of what to teach, how to teach and how to teach the learners. It is the document in which is listed, the items to be taught (cg. set, learners, their needs, scale, goal, time, objectives, materials, techniques, approaches, etc. ), in a particular course an4 so on. A syllabus is not a panacea, and each syllabus has its character and tenets. I think that the syllabus which is proper to our TEFL is the Integrated one. The Integrated Syllabus based a communicative approach will have the effect of something supplying some insight and sensitivity.

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