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- 저자 : 이용환(Yong-Hwan Lee) (검색결과 624 건)
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이용환(Lee, Yong-Hwan) 글로벌경영학회 2008 글로벌경영학회지 Vol.5 No.4
외환위기를 전후한 경제상황의 급격한 변화는 기업경영에 관련된 많은 시사점을 보여 주었다고 할수 있다. 이러한 영향은 원가행태에 있어서도 의미 있는 변화를 초래할 것으로 예상할 수 있다. 본 연구에서는 원가동인인 생산량의 대용치로 당기총제조비용을 사용하여 원재료비, 노무비, 경비의 원가행태를 외환위기를 전후하여 비교 분석하였다. 분석결과 원재료비증가율의 경우에는 외환위기 직전의 하방경직적 행태가 직후에는 상방경직적인 행태로 바뀌었다가 다시 하방경직적인 행태로 전환되었으며, 반대로 노무비증가율과 경비증가율은 외환위기 전의 상방경직적인 행태에서 외환위기 직후 하방경직적인 행태로 바뀌었다가 다시 상방경직적인 행태로 전환되고 있음을 알 수 있었다. 따라서 외환위기의 경제상황을 특별한 경우라고 가정하면, 우리나라 기업에서의 원가행태는 원재료비는 하방 경직적인 원가행태를, 노무비와 경비는 상방경직적인 원가행태를 보이고 있다고 할 수 있다. Through the economic crisis in Korea we could show radical change of economic state and presume that it probably influenced to business management and cost behavior. In this study comparatively analysis behavior of material costs, labor costs, and expenses, using current manufacturing cost as a cost driver instead of output. As a result the increasing rate of material costs shows downward stickiness before Economic Crisis, and upward stickiness immediately after Economic Crisis, then changed downward stickiness. On the contrary the increasing rate of labor costs and expenses shows upward stickiness before Economic Crisis, and downward stickiness immediately after Economic Crisis, then changed upward stickiness. Therefore, because Economic Crisis was a special case, we can say that in Korea material costs shows downward stickiness, and labor costs and expenses shows upward stickiness.
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이용환(Lee, Yong-hwan),유영중(Yoo, Young-joong) 글로벌경영학회 2012 글로벌경영학회지 Vol.9 No.2
본 연구는 주가변동성에 영향을 미치는 재무적 요인은 무엇인가를 규명하고, 이러한 재무적 요인이 주가변동성에 영향을 주는 정도가 기업특성에 따라 다르게 나타나고 있는지를 분석하고자 하는 것이다. 분석을 위하여 표본기업을 매출액증가율과 순이익증가율에 따라 4개의 집단으로 분류하였으며, 집단간 변수의 차이를 검증하기 위하여 분산분석을 실시한 바, 자기자본순이익률과 자기자본영업이익률을 제외한 모든 변수가 집단 간 유의적인 차이가 있는 것으로 나타났다. 4개의 집단에 대하여 주가변동률과 재무지표 사이의 회귀분석을 실시한 결과 집단 마다 유의성을 가지는 변수와 그 변수가 가지는 비표준화계수의 부호 및 크기에 차이가 있음을 알 수 있었다. 따라서 기업의 특성에 따라 재무비율이 주가변동율에 미치는 영향은 차이가 있을 것이라는 가설은 지지되고 있는 것으로 해석된다. The motivation of this study is identify financial factors influenced to volatility and analysis the effect of financial factors to volatility that is presumed different by business trait. For this study group sample business into four classes by increase ratio of sales and increase ratio of net profit. As a result of analysis of variance all the variables except ratio of net profit to equity capital and ratio of sales profit to equity capital shows resonable differences between four groups. Then it is expected that financial factors shows resonable relations to volatility at each four groups differently. As a result by regression it shows different resonable variables between four groups. And the size of unstandardized coefficients and symbols of unstandardized coefficients are different between four groups. So it is accepted that the effect of financial factors to volatility are different between four groups.
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이용환(Lee, Yong-hwan),유영중(Yoo, Young-joong) 글로벌경영학회 2012 글로벌경영학회 학술대회 발표논문집 Vol.2012 No.1
본 연구는 주가변동성에 영향을 미치는 재무적 요인은 무엇인가를 규명하고, 이러한 재무적 요인이 주가변동성에 영향을 주는 정도가 기업특성에 따라 다르게 나타나고 있는지를 분석하고자 하는 것이다. 분석을 위하여 표본기업을 매출액증가율과 순이익증가율에 따라 4개의 집단으로 분류하였으며, 집단 간 변수의 차이를 검증하기 위하여 분산분석을 실시한 바, 자기자본순이익률과 자기자본영업이익 률을 제외한 모든 변수가 집단 간 유의적인 차이가 있는 것으로 나타났다. 4개의 집단에 대하여 주가변동률과 재무지표 사이의 회귀분석을 실시한 결과 집단 마다 유의성을 가지는 변수와 그 변수가 가지는 비표준화계수의 부호 및 크기에 차이가 있음을 알 수 있었다. 따라서 기업의 특성에 따라 재무비율이 주가변동율에 미치는 영향은 차이가 있을 것이라는 가설은 지지되고 있는 것으로 해석된다. The motivation of this study is identify financial factors influenced to volatility and analysis the effect of financial factors to volatility that is presumed different by business trait. For this study group sample business into four classes by increase ratio of sales and increase ratio of net profit. As a result of analysis of variance all the variables except ratio of net profit to equity capital and ratio of sales profit to equity capital shows resonable differences between four groups. Then it is expected that financial factors shows resonable relations to volatility at each four groups differently. As a result by regression it shows different resonable variables between four groups. And the size of unstandardized coefficients and symbols of unstandardized coefficients are different between four groups. So it is a
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모바일 디스플레이에서 TS 알고리즘을 이용한 실시간 얼굴영역 검출
이용환,김영섭,이상범,강정원,박진양,Lee, Yong-Hwan,Kim, Young-Seop,Rhee, Sang-Bum,Kang, Jung-Won,Park, Jin-Yang 한국반도체디스플레이기술학회 2005 반도체디스플레이기술학회지 Vol.4 No.1
This study presents a new algorithm to detect the facial feature in a color image entered from the mobile device with complex backgrounds and undefined distance between camera's location and the face. Since skin color model with Hough transformation spent approximately 90$\%$ of running time to extract the fitting ellipse for detection of the facial feature, we have changed the approach to the simple geometric vector operation, called a TS(Triangle-Square) transformation. As the experimental results, this gives benefit of reduced run time. We have similar ratio of face detection to other methods with fast speed enough to be used on real-time identification system in mobile environments.
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이용환,김영섭,Lee, Yong-Hwan,Kim, Youngseop 한국반도체디스플레이기술학회 2020 반도체디스플레이기술학회지 Vol.19 No.1
Object detection plays a critical role in the field of computer vision, and various researches have rapidly increased along with applying convolutional neural network and its modified structures since 2012. There are representative object detection algorithms, which are convolutional neural networks and YOLO. This paper presents two representative algorithm series, based on CNN and YOLO which solves the problem of CNN bounding box. We compare the performance of algorithm series in terms of accuracy, speed and cost. Compared with the latest advanced solution, YOLO v3 achieves a good trade-off between speed and accuracy.
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이용환,최인호,Lee, Yong-Hwan,Choi, Im-Ho 대한환경위생공학회 2009 대한환경위생공학회지 Vol.24 No.4
This research was performed to purify water quality through removing T-N, and T-P and to estimating rate of $NO_x$ by the response of photocatalyst using ceramics. The ceramics was a mixtures of Titanium Diboride($TiB_2$) which is used to develop armored cars with excellent protective power and lightness, Olivine, and Hwangto with water and was furnaced for an hour at $1160^{\circ}C$. Hwangto and Olivine used in the study are produced at Haenam-gun, Jeonnam, and Andong-city, Gyeongsangbuk-do, respectively. The ground Hwangto and Olivine were seived through PR $100{\times}200$, and $TiB_2$ was a product of SIGMA ALDRICH. The experiment was performed under the sunlight, Mass flow controller was used for constant flow to pass through the pyrex reactor which was fully charged with furnaced ceramics. The concentration of $NO_2$ gas passed through the pyrex reactor was measured by Multi Gas Monitor. The reaction took for 60 minutes, The material was exposed to sunlight for 40 minutes. The sunlight was interrupted before and after the exposure for 10 minutes. The result showed that the concentration of $NO_2$ gas of the ceramics with $TiB_2$ and without $TiB_2$ became reduced and then maintained the same concentration under the sunlight, and became increased when the sunlight is interrupted. The $NO_2$ removing efficiency of the ceramics mixed with $TiB_2$ was 14~43% higher than that of the ceramics without $TiB_2$ under the sunlight. The study showed that the removing rate of $NO_2$ was 80% when the mixture rate of Hwangto, Olivine, and $TiB_2$ was 68%, 30% and 2%.
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