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본 논문은 고해상도와 고압축 영상이 필요로 하는 특정응용분야에 JPEG2000의 표준을 적용한 영상센서의 성능개선을 위해 정확인 임계값 설정을 목표로 하고 있다. 영상 압축을 하기 위한 JPEG2000 표준을 위한 소프트웨어 구현은 치리속도가 기존의 JPEG에 비하여 매우 느리다는 단점을 갖고 있으며, 또한 JPEG2000 표준의 영상성능을 개선하기위하여 DWT(Discrete wavelet transform)레벨을 향상시킬 경우 영상 데이터 압축에 대한 영상 치리 속도가 저하되는 현상을 갖고 있다. 이러한 해결을 위하여 웨이블렛 계수에 중앙절대편차(Median Absolute Deviation)의 순서통계량을 이용한 임계값을 설정하여 최적의 웨이블렛 레벨 설계 방법을 제안하므로 화질개선을 보여 주었다. In this paper, a particular application of high-resolution and high compression of images required of JPEG2000 standard applied in the field of hardware design, production was implemented. JPEG2000 standard for image compression using the software implementation of the processing speed is very slow compared to conventional JPEG disadvantages, and also the standard of JPEG2000 DWT (Discrete wavelet transform) to improve the level of compression for image data if processing speed is a phenomenon that has degraded. In order to solve the threshold using order statistic of MAD(Median Absolute Deviation) for the wavelet coefficients was proposed to effectively image sensor improve. In this paper, the optimal DWT by changing the level for still image compression, image quality has shown improvement.
Transient global amnesia is characterized by a sudden inability to form new memories (anterograde amnesia) that usually last for minutes to several hours but never longer than 24 hours. and there are no other focal neurologic signs or symptoms. Retrograde amnesia from a few hours to many years may also be associated with this condition. We report a case of a 56-year-old female patient who experienced transient global amnesia in the recovery room after general anesthesia. She repeated the same queries several times to persons nearby and appeared perplexed. A detailed neurologic examination was otherwise entirely normal. Her symptoms resolved completely the next day. (Korean J Anesthesiol 2006; 51: 130~2)
최근 철도산업은 저탄소 녹색철도를 위해 운영뿐만 아니라 철도시설물 건설 시 발생하는 탄소배출량을 파악하고 관리하기 위한 연구가 진행되고 있다. 따라서 본 연구에서는 철도건설현장의 탄소배출량 비중이 높은 토목분야에 대하여 자재 사용량과 탄소배출량과의 상관관계를 분석하였다. 결과적으로 다변량 회귀분석을 통해 상관관계가 높은 토공사의 주요 배출원은 콘크리트, 철근, 시멘트, 기성말뚝으로 나타났으며, 교량공사는 철근,PC강연선, 기성말뚝인 것으로 나타났다. 마지막으로 터널공사에서는 콘크리트, 철근, 시멘트가 주요 배출원인 것으로 파악되었다. 본 연구결과는 향후 철도건설에 따른 탄소배출량 베이스라인 설정에 기초자료로 활용될 수 있다. Recently, there are researches to identify and manage carbon emission at the infra construction as well as during operation for low carbon green railroad. In this study, the correlation between the use of material and carbon emission was analyzed on the civil sector in railway construction. As a result, the earthwork was mainly related to concrete, steel, cement and precast-pile, and bridge construction was steel, PC steel wire and precast-pile based on multivariate regression analysis. Carbon emission of tunnel construction was affected by concrete, steel and cement. In the future, these results can be applied to estimate the baseline of carbon emission during railroad construction.
In preparation for the WTO Ministerial Conference on the Fisheries Subsidies scheduled at the end of 2019, we examined the developments of fisheries subsidy negotiations and showed the reasons why fisheries subsidies should be regulated. We also looked into the classification of fisheries subsidies made by international organizations and researchers, and examined Korea"s fisheries subsidies and their characteristics during the period from 2016 to 2019. Based on the results of such reviews, we proposed policiy suggestions for fisheries subsidy of Korea.
Background: Induction with propofol has a high incidence of pain, as well as postoperative nausea and vomiting (PONV). The aim of this study was to assess the effect of a course of dexamethasone on the pain, postoperative nausea and vomiting associated with a Propofol injection, in patients undergoing otolaryngology-head and neck surgery. Methods: One hundred twenty adults, 20-60 years of age, ASA physical status I or II, were allocated to one of two groups. Either dexamethasone 5 ml (8 mg) or saline 5 ml was administered intravenously to each group. After 60 seconds, propofol was injected into the patients` hand veins over a 30 second period and the patient was asked questions regarding the injection pain after 10 seconds. Postoperative nausea, vomiting and post-tonsilectomy pain were recorded in the recovery room (1 h after surgery) and in the hospitalization area (6 h after surgery). Results: The severity and incidence of pain at the time of the propofol injection, PONV, and the level of post-tonsillectomy pain were significantly lower in the dexamethasone group than in the control group. Conclusions: The prophylactic intravenous administration of 8 mg dexamethasone is effective in reducing the severity of pain after a propofol injection and after the tonsillectomy, and decreased the incidence of PONV. (Korean J Anesthesiol 2006; 50: 490~4)