당대여성대자아생존처경적각오여대여성해방적향왕(當代女性對自我生存處境的覺悟與對女性解放的向往); 장신흔(張辛欣)

김경남 한국외국어대학교 외국학종합연구센타 중국연구소 1998 中國硏究 Vol.22 No.-

간호사가 지각한 간호조직문화와 행복지수가 이직의도에 미치는 영향

김경남 보건의료산업학회 2014 보건의료산업학회지 Vol.8 No.2

The purpose of this study was to identify the effect nursing organizational culture and happiness index on turnover intention among nurses. The subjects of this study were 377 nurses who were working at 3 general hospitals in B city. The data were collected by structured questionnaire from July 1 to August 28 of 2013. The data collected were analyzed with SPSS Win 20.0 using descriptive methods, t-test, ANOVA, Pearson correlation coefficient and Stepwise multiple regression. Turnover intention were significant negative correlation for affiliative oriented organizational culture(r=-.137, p=.008), happiness index(r=-.290, p<.001). There were significant positive correlation for innovative oriented organizational culture(r=.123, p=.017), rank oriented organizational culture(r=.126, p=.015), task oriented organizational culture(r=.218, p<.001). Factors affecting for turnover intention were happiness index(β=-.297, p<.001), rank oriented organizational culture(β=.266, p<.001), nursing experience(β=.199, p=.009), affiliative oriented organizational culture(β=-.142, p=.034). The explained variances for were turnover intention among nurses 17.2%. Based on the study consider to development and education program of happiness index and affiliative oriented organizational culture for nurses in the hospital setting.

석탄 바닥재와 점토를 이용한 광미의 중금속 고정화와 재활용

김경남,박준석 한국폐기물자원순환학회 2010 한국폐기물자원순환학회지 Vol.27 No.5

저급 점토와 석탄회를 이용한 숏크리트용 골재의 제조

김경남,정희수,박현,Kim, Kyung-Nam,Jung, Hee-Su,Park, Hyun 한국결정성장학회 2010 韓國結晶成長學會誌 Vol.20 No.3

In this study, the artificial coarse aggregate was manufactured by using coal ash and low grade clay. The characteristics of a coal ash-clay system were investigated using XRD, XRF, TG-DTA, SEM and Dilatometer with various coal ash contents. The chemical compositions are the fly ash, bottom ash and clay, $Al_2O_3$ are 28.5 wt%, 32.4 wt% and 18.1 wt%, and $SiO_2$ are 33.0 wt%, 53.7 wt% and 68.4 wt% in weight ratio, respectively. The shrinkage of specimens started at around $850^{\circ}C$ and changed little up to $1100^{\circ}C$, but increased markedly at above $1100^{\circ}C$. The shrinkage rate is strongly related to the decarbonization amount of coal ash. At the sintering temperature $1150^{\circ}C$, it was found that quartz, mullite, anorthite and albite phase exist in all specimens. It was found that bottom-clay system specimen sintered at $1150^{\circ}C$ had a good compressive strength of 87.5 kg/$cm^2$, and the compressive strength of bottom-clay specimen was higher than that of fly-clay system specimen. The reusability of coal ash as a raw material in the process of shotcrete resources such as artifical coarse aggregate is highly expected. 본 연구에서는 인공골재를 제조하기 위하여 저급 점토에 석탄회(Fly Ash와 Bottom Ash)를 각각 첨가하여, 여러 분석기기(SEM, XRD, XRF, TG-DTA, Dilatometer, UTM)를 이용하여 물리 화학적 특성을 조사하였다. Fly ash, bottom ash, clay의 화학조성은 $SiO_2$가 33.01, 53.73 및 68.36 wt% $Al_2O_3$는 28.54, 32.42 및 18.12 wt%와 이외에 $Fe_2O_2$와 알카리 성분 등이 함유하고 있다. 소성에 의한 인공골재의 치밀화 과정을 관찰하기 위해 Dilatometer를 측정하였다. 시편들은 $850^{\circ}C$ 부근에서 서서히 수축이 시작되어 $1100^{\circ}C$ 부근에서 급격하게 수축하는 것을 볼 수 있었다. 소성온도와 배합조성에 따른 시편의 결정상을 알아보기 위하여 $1150^{\circ}C$에서 30분간 열처리 하였으며 fly Ash를 사용한 시편의 주 결정상은 quartz, anorthite, albite상이 관찰되었고 bottom ash를 사용한 시편은 quartz, anorthite, mullite가 관찰되었다. $1150^{\circ}C$에서 소성한 시편에서 플라이애쉬 보다 바탐애쉬를 첨가한 시편이 압축강도가 우수 하며, 바탐애쉬 첨가한 시편의 경우 압축강도 87.5 kgf/$cm^2$로 가장 우수 하였으며 인공골재로의 이용이 가능함을 알 수가 있다.

초흡수성 고분자 중합체가 크리핑 벤트그래스, 켄터키 블루그래스 및 들잔디의 잔디품질에 미치는 효과

김경남,Kim, Kyoung-Nam 한국잔디학회 2011 한국잔디학회지 Vol.25 No.1

본 연구는 토양개량재 혼합구에서 고분자 중합체 비율이 주요 초종의 잔디품질에 미치는 영향을 조사함으로 수분 흡수 중합체를 이용한 토양개량재의 개발 및 실무 응용에 활용할 수 있는 기초자료를 얻기 위해 수행하였다. 토양개량제 혼합구는 모래, 토양개량재 SOA 및 중합제 WSP를 이용하여 전체 12개 처리구틀 준비하였다. 온실에서 생장한 크리핑 벤트그래스, 켄터키 블루그래스 및 들잔디의 잔디품질은 토양개량재 SOA 및 WSP 중합체 혼합비율에 따라 유의한 차이가 나타났다. 초종별 잔디품질은 크리핑 벤트그래스 > 들잔디 > 켄터키 블루그래스 순서로 나타났고, 시각적 잔디품질 점수는 WSP 중합체 혼합비율에 따라 크리핑 벤트그래스 0.3~9.6, 켄터키 블루그래스 0.3~4.0 및 들잔디 0.9~5.8 사이로 초종 간 최대 5.6정도 차이가 있었다. 3종류 공시초종에서 잔디품질의 변화패턴은 WSP 중합체 혼합비율에 따라 경시적으로 다르게 나타났으며, 잔디품질을 고려할 때 혼합비율은 크리핑 벤트그래스와 들잔디는 5%, 켄터키 블루그래스는 5~10% 범위가 적절하였다. 잔디품질에 대한 전반적인 WSP 중합체 처리효과는 크리핑 벤트그래스, 켄터키 블루그래스 및 들잔디 모두 SOA 20% 혼합구에서 가장 양호하게 나타났다. 그리고 토양개량재 SOA를 함유한 식재층 토양에 WSP 중합체 혼합 시 SOA 혼합비율은 한지형인 크리핑 벤트그래스와 켄터키 블루그래스의 경우 15~20% 사이, 그리고 난지형인 들잔디는 20% 정도를 혼합하는 것이 적절하다고 판단되었다. 향후 유가질 토양개량재를 함유한 식재층 토양에서 0~15% 사이의 저수준의 WSP 중합체 혼합과 함께 칼슘, 펄라이트 등 무기 영양분이 초장, 밀도 및 품질 등 잔디생육 특성에 대한 효과검정을 통해 WSP 중합체를 이용한 토양개량재의 개발 및 실무 응용에 활용하는 것이 바람직하다. Research was initiated to investigate the effect of high water-absorbing polymer on turf grass quality of three major turfgrasses. A total of 12 treatment combinations were used in the study. Treatments were made with different rates of sand, soil organic amendment (SOA), and water-swelling polymer (WSP). Visual turf grass quality was evaluated in creeping bentgrass (Agrostis palustris Huds., CB), Kentucky bluegrass (Poa pratensis L., KB), and zoysiagrass (Zoysia japonica Steud., Zoy) grown under greenhouse conditions. Significant differences were observed among the treatments in CB, KB, and Zoy. Visual quality ratings varied with mixing rates of SOA and WSP, being maximum 5.6 in differences among them. At the end of study it ranged from 0.3 to 9.6 in CB, 0.3 to 4.0 in KB, and 0.9 to 5.8 in Zoy. Turfgrass quality pattern changed with time after seeding among treatments influenced by WSP rates. From this study, a proper rate of WSP is considered to be 5%, 5~10%, and 5% for CB, KB and Zoy, respectively. In general, overall treatment effect of WSP on turfgrass quality was highly associated with SOA 20% in three turtgrass species. When mixing sand with SOA and WSP for rootzone soil, a proper rate of SOA is considered to be 15 to 20% for CB and KB, while 20% for Zoy of warm-season grass. A further study would be required to investigate the effect of varied, gradual mixing rates of WSP on growth characteristics of turfgrasses grown on mixtures of sand, SOA, and WSP before a field application.

딥러닝을 이용한 소도체 영상의 등급 분석 및 단계별 평가

김경남,김선종 국제문화기술진흥원 2022 The Journal of the Convergence on Culture Technolo Vol.8 No.2

Quality evaluation of beef carcasses is an important issue in the livestock industry. Recently, through the AI monitor system based on artificial intelligence, the quality manager can receive help in making accurate decisions based on the analysis of beef carcass images or result information. This artificial intelligence dataset is an important factor in judging performance. Existing datasets may have different surface orientation or resolution. In this paper, we proposed a two-stage classification model that can efficiently manage the grades of beef carcass image using deep learning. And to overcome the problem of the various conditions of the image, a new dataset of 1,300 images was constructed. The recognition rate of deep network for 5-grade classification using the new dataset was 72.5%. Two-stage evaluation is a method to increase reliability by taking advantage of the large difference between grades 1++, 1+, and grades 1 and 2 and 3. With two experiments using the proposed two stage model, the recognition rates of 73.7% and 77.2% were obtained. As this, The proposed method will be an efficient method if we have a dataset with 100% recognition rate in the first stage.

LED용 CaGa2S4:Eu2+ 황색 형광체의 합성 및 발광특성

김경남,김창해,박승혁,박정규*,장호겸,김재명 대한화학회 2005 대한화학회지 Vol.49 No.2

도시내 산지의 토석류 위험구역 예측

김경남,장수진,이광연,서기범,김범수,전근우 한국방재학회 2015 한국방재학회논문집 Vol.15 No.3

최근 토사재해로 인한 인명피해가 증가함에 따라 도시 내 산지의 토석류 위험구역 지정과 공표 필요성이 강조되고 있다. 이 연구에서는 주민들의 토사재해 위험 인지를 강화하기 위해 수문 미지형 분석 기법을 바탕으로 토석류 미발생 도시산지를 대상으로 재해위험지를 획정하는 방안을 검토하였다. 운반가능토사량(V ec)은 침식가능 토사량(V e)에 비해 과대치를 나타냈고, 도달거리의 범위는 확산각을이용한 도달거리(L 3), 재해위험이 있는 최하류 밑단부 설정에 의한 도달거리(L h), 최장유로의 길이를 이용한 도달거리(L 1), 경험식을 이용한 도달거리(L 2) 순이나, 최대 도달거리는 (L 1)<(L 2)<(L h)<(L 3)로 나타나 기 개발된 도시에서는 (L 1) 및 (L 2) 값을 적용하는 것이 보다현실적인 것으로 파악되었다. (L 2)와 (L h)는 상대적으로 대유역 저개발지역에 적용하는 것이 더 적합할 것으로 예상된다. 이 연구에서도입한 수문 미지형 기반의 방법은 주민의 자가진단적 토석류 위험구역 판별을 가능하게 하여 사회적 방재활동 강화에 기여할 것으로판단된다. As casualties are increased due to a landslide recently, it is emphasized that the division of a dangerous area from sediment disaster, specially in an urban area, is getting important. The aim of this study is to redefine how to delineate debris flow-prone area based on the hydrological micro-topography analysis techniques and to enhance the cognitive of residents on that risk in an urban mountainous area. As the results, movable sediment (V ec) is excessively larger than the erosional sediment (V e), the range of runout distance is in order of using spread angle(L 3), set lowest part of the debris flow-prone area(L h), using stream length(L 1), empirical formula(L 2). But the maximum distance is in (L 1)<(L 2)<(L h)<(L 3). Therefore, the value of (L 1), (L 2) are proper in urban area, it was projected to be more proper that the value of (L 3) and (L h) applicate in bigger watershed and lower development part. The method of hydrological microtopography analysis is likely to contribute to strengthening the activity of social disaster prevention by enabling the self-diagnostic determination of inhabitants on dwelling areas.

7-T Magnetic Resonance Imaging of the Inner Ear’s Anatomy by Using Dual Four-element Radiofrequency Coil Arrays and the VIBE Sequence

김경남,허필,김영보,한규철 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.4

An ultra-high-field magnetic resonance (MR) scanner and a specially-optimized radiofrequency(RF) coil and sequence protocol are required to obtain high-resolution images of the inner ear thatcan noninvasively confirm pathologic diagnoses. In phantom studies, the MR signal distribution ofthe gradient echo MR images generated by using a customized RF coil was compared with that of acommercial volume coil. The MR signal intensity of the customized RF coil decreases rapidly fromnear the RF coil plane toward the exterior of the phantom. However, the signal sensitivity of thiscoil is superior on both sides of the phantom, corresponding to the petrous pyramid. In in-vivo 7-TMR imaging, a customized RF coil and a volumetric-interpolated breath-hold examination imagingsequence are employed for visualization of the inner ear’s structure. The entire membranous portionof the cochlear and the three semicircular canals, including the ductus reunions, oval window, andround window with associated nervous tissue, were clearly depicted with sufficient spatial coveragefor adequate inspection of the surrounding anatomy. Developments from a new perspective to innerear imaging using the 7-T modality could lead to further improved image sensitivity and, thus,enable ultra-structural MR imaging.

Role of Caveolin-1 in Indomethacin-induced Death of Human Hepatoadenocarcinoma SK-Hep1 Cells

김경남,강주희,임성빈,박창신 대한약리학회 2008 The Korean Journal of Physiology & Pharmacology Vol.12 No.4

Caveolin-1 (CAV1) is an integral membrane protein that may function as a scaffold for plasma membrane proteins and acts as a tumor suppressor protein. One causative factor of chemotherapy- resistant cancers is P-plycoprotein (P-gp), the product of the multidrug resistance-1 gene (MDR1), which is localized in the caveolar structure. Currently, the interactive roles of CAV1 and MDR1 expression in the death of cancer cells remain controversial. In this study, we investigated the effects of indomethacin on the cell viability and the expression levels of MDR1 mRNA and protein in a CAV1- siRNA-mediated gene knockdown hepatoma cell line (SK-Hep1). Cell viability was significantly decreased in CAV1-siRNA-transfected cells compared with that of control-siRNA-transfected cells. Furthermore, the viability of cells pretreated with CAV1 siRNA was markedly decreased by treatment with indomethacin (400μM for 24 h). However, the protein and mRNA levels of MDR1 were unchanged in CAV1-siRNA-transfected cells. These results suggest that CAV1 plays an important role as a major survival enzyme in cancer cells, and indomethacin can sensitively induce cell death under conditions of reduced CAV1 expression, independent of MDR1 expression.