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An Efficient Video Segmentation Algorithm
Kim, Gi Seok 慶州大學校 2005 論文集 Vol.18 No.2
이진 분리 방법에 기반한 계층적 영상 분할 알고리듬을 제안하였다. 형태학적 연산에 의한 분할은 형태소의 크기에 의존하고 하부 계층에서 큰 형태소가 필요하므로, 연산량이 많이 필요하다. 본 논문에서는 이진 분리 방법을 이용하여 연산량을 줄이는 기법을 제안하였다. 제안한 알고리듬은 작은 영역을 제거하기 위한 후처리과정이 필요하지 않으며 계층의 단순화 단계에서 작은 형태소를 사용한다. 또한, 분할된 영역의 윤곽선을 단순화시키는 기법을 적용하여서, 잡음이 있는 영역 뿐만 아니라 버텍스를 단순화하여 윤곽선 부호화가 용이하도록 히였다. 제안한 알고리듬을 통해, 단순화된 윤곽선 영상을 얻을 수 있고 결과적으로 연산량이 작아진다.
멀티미디어 서비스를 위한 영상의 내용에 기반한 적응적 윤곽선 부호화
김기석 경주대학교 1997 論文集 Vol.9 No.-
As the needs for next generation image coding techniques suitable for very low bit rate environment are growing, many efficient content-based image coding methods have been developed recently. In this paper, an adaptive contour coding technique are proposed for the region-based image coding. The contour coding in the segmentation-based coding usually occupies the biggest part in the encoded bitstream. In this paper, contour segments are adaptively encoded by considering neighbor regions. Encoded bitrate is reduced without loss of the subjective image quality. after morphological segmentation using watershed algorithm to the image, the contour segments are classified according to the contrast of the adjacent regions. Then, the contour segments with low contrast are highly compressed with various simplification such as polygonal approximation and morphological low pass filtering. and modified chain coding method for filtered image with morphological low pass filter such as multiscale close_opening according to the contrast is studied. Experimental results show outstanding performance for the very low bitrate video coding.
병원균의 파괴효율 및 배기가스 분석에 의한 병원폐기물 소각로의 성능평가
김석완,박기호 慶山大學校 1998 論文集 Vol.16 No.1
Recently, a quantity of medical waste has been increased according to the expansion of medical facilities caused by rising in living standard and in need for a healthy life. The status of medical waste management is, however, still in an infant stage, Incineration has been proven to be an effective technology of reducing volume, mass and toxicity of medical waste. There are few medical waste incinerators in Korea, but most are not even operated properly. And pathogen's release and emission of various air pollutants can affect the public directly because most medical waste incinerators are located in the crowded area. To assess the release potential of pathogenic bacteria from biomedical waste incinerator, the incinerator is spiked with 3.70 x 10의9승 spores of Bacillus stearothermophilus that are poured on crumpled newspaper in plastic bags and are burned with routine waste. The experimental result of air emission, the total destruction efficiency of surrogate bacteria was99.9957%. SO₂ and NOx emission are lower than emission standards. But higher value of CO emission are made with three times.
천기석 충남대학교 인문과학연구소 1976 인문학연구 Vol.3 No.2
The purpose of this paper is to establish the negative viewpoints for the Korean auxiliaries in the middle Korean. They are summarized as follows; Modern Korean auxiliaries were pursued by the generative grammarians but not middle Korean auxiliaries. By some generative grammarians much of auxiliaries has been pursued in the modern Korean but not in the middle Korean, the main forcus for the modern korean but not in the middle Korean. The main forcus for the modern auxiliaries by the generative grammarians was the complemmentizer. Wheather a phrase is a noun phrase complement or verb phrase complement has been determined accordingly to the complementizer's properties, but these points do not content the basic intention for the negative viewpoint of the auxiliaries because the complementizer is flexible. For these reasons, I want to establish the negative viewpoints of the auxiliaries in the middle Korean by admitting noun phrases all the complements as complement or pseudo noun phrase complement. In the surface structure of the sentence that involved so called main verb and auxiliaries, I assert that the one is main verb, the others auxiliaries. For the auxilies helps the main verb followed by it, but we must examine the dominating scope of the auxiliaries whether they dominate only main verb or the whole units precceding them. In my opinion in the surface structure that involve main verb and auxiliaries, I would ve ber to the main verb for the auxiliaries. But in deep structure, the traditional auxiliary is the verb of the subsentence and the main verb is the verb super sentence.
김기석 경주대학교 2001 論文集 Vol.14 No.-
In this paper, a new method of feature extraction for 2-dimensional occluded object recognition is proposed considering human visual system. Firstly input objects are thinned and secondly the thinned segments are segmented to meaningful parts. The ending points and gradients of meaningful segmented parts are used for matching process. The proposed approach has the advantage of efficient information extraction regardless of holes of objects considering human visual system. Furthermore, using this algorithm high accuracy and less computation are guaranteed.
한기석,배일헌,차상훈,김성진,박길선 충북대학교 의과대학 충북대학교 의학연구소 2003 忠北醫大學術誌 Vol.13 No.2
갑상선 조직 전체가 설기저부에 발생한 이소성 설갑상선 증례를 경험하였기에 그 방사선학적 소견을 문헌고찰과 함께 보고하고자 한다. 증례는 59세 여자 환자로 40 일전부터 발생한 음성 변화를 주소로 내원하였다. 이학적 검사에서 설 기지부 중앙에 회백색의 격막에 둘러 쌓인 3 cm 가량의 종괴가 있었으며, 종괴는 내장으로 돌출하여 구인두를 막고 있었다. 경부 전산화 단층촬영 측면 정찰 촬영에서, 설 기저부에 후방으로 돌출하여 구인두를 막고 있는 경계가 분명한 연부조직 종괴가 보였으며, 전산화 단층촬영 동맥기와 정맥기에 주변의 혈관과 비슷한 강하고 균일한 조영증강을 보이는 장경 2.5 cm의 원형 종괴가 있었다. 또한 갑상선이 있어야 할 경부 전방 공간에서 정상 갑상선 조직은 전혀 보이지 않았다. 설 기저부의 종괴에서 생검을 시행하였으며 병리 검사에서 갑상선 조직으로 진단되어 설갑상선으로 확진되었다. The authors report a case of ectopic thyroid that whole thyroid tissue was replaced by lingual thyroid. A 59-year-old female presented with dysphonia duration of 40 days. On physical examination, there was a 3 cm sized well encapsulated whitish mass protruding to oral cavity in milline of tongue to base. Computerized tomography of neck revealed homogeneously enhancing well marginated 2.5 cm sized round mass in the cecum of tongue base on arterial and venous phase. And there was no normal thyroid gland in lower anterior neck.
도시공원녹지의 계절별 토양특성이 곰솔의 생육에 미치는 영향
김석규,박승범,남정칠,김승환,이기철 東亞大學校 建設技術硏究所 2006 硏究論文集 Vol.29 No.2
The purpose of this study is to clarify correlations between soil environments and the growth of trees in urban park and green areas and thereon analyze effects of seasonal changes in such environments on such growth. To determine seasonal factors of soil affecting the vitality of Pinus thunbergii, first of all, the study designated the vitality as a dependent variable and soil hardness, moisture, pH, K, Na, Mg and Ca as independent variables. Then the study performed Pearson's coefficient analysis. Based on findings from the analysis, the multiple regression analysis were carried out. The result of the study can be described as below; When correlations between the independent and dependent variables were examined using Pearson's correlation analysis, it wa found that the vitality, soil hardness, K, Na, Mg and Ca were significant at the level of 5%. Among those significant variables, the vitality and Mg were most correlated with the coefficient of 0.415, while K and Mg were least correlated with that of -0.235. Considering findings from the coefficient analysis, this researcher performed multiple regression analysis to determine soil factors influencing the growth of Pinus thunbergii. As a result. it was found that the growth was most influenced by Mg, followed by soil hardness and Ca in order. To clarity what soil factors influence the growth of Pinus thunbergii in spring, the researcher carried out multiple regress ion analysis to find that the growth was most influenced by pH. followed by soil hardness. Then the researcher applied multiple regression analysis to determine soil factors influencing the growth mentioned above in summer. The analysis showed that no soil factors affected the vitality at the significance level of 5% for t. Concerning relative importance based on the standard regressive coefficients, or β, K had the coefficient of 0.437 suggesting it was relatively more influential comparing to the other independent variables. Soil factors which influence the growth of Pinus thunbergii in fall were determined through multiple regressive analysis to find that the growth was influenced by soil hardness in the same season. Also such factors as affecting the growth mentioned above in winter were clarified using multiple regressive analysis to show that the growth was most influenced by soil hardness, followed by Mg, pH and Ca in order. In conclusion soil hardness had effects on the growth of Pinus thunbergii throughout four seasons except summer. Thus soil hardness is the most important factor for the growth of Pinus thunbergii. 본 연구는 도시공원녹지의 토양환경과 수목생육과의 상관관계를 구명하고, 계절별 토양 특성의 변화가 수목의 생육에 미치는 영향을 분석하고자 하였다. 곰솔의 수목활력 도에 영향을 미치는 계절별 토양인자를 알아보기 위하여 수목활력 도를 종속변수로 지정 하고 토양경도, 토양수분함량, 토양 pH , K, Na, Mg,Ca함량을 독립변수로 지정하여 Pearson 상관 분석을 수행한 후, 그 결과를 이용하여 다중 회귀분석을 실시하였으며 그 결과는 다음과 같다. 1) 각 변수들 간의 Pearson 상관분석을 실시한 결과, 유의확률 값 5%수준에서 유의한 변수는 수목활력도와 토양경도, K, Na, Mg Ca로 나타났다. 유의한 변수들 중 에서 수목활력도와 Mg가 상관계수 0.415로서 상관성 이 높게 나타났고 K와 Mg가 상관계수 - 0.235 로 상관성이 가장 낮게 나타났다. 2) 상관분석 결과를 바탕으로 곰솔의 생육에 미치는 조사지의 토양인자를 알아보기 위해 다중 회귀 분석한 결과, 경도, Mg, Ca가 수목활력 도에 유의적인 영향을 미치는 것으로 판단할 수 있었으며, 곰솔의 생육에 영향을 미치는 토양인자는 Mg, 토양경도, Ca 순으로 나타났다. 3) 곰솔의 생육에 영향을 미치는 봄철의 토양특성은 pH, 토양경도 순으로 나타났고, 곰솔의 생육에 영향을 미치는 여름철의 토양 특성은 없는 것으로 나타났으며, 곰솔의 생육에 영향을 미치는 가을 철 의 토양특성은 토양경도로 나타났고, 곰솔의 생육에 영향을 미치는 겨울철의 토양특성은 토양경도, Mg,pH, Ca 순으로 나타났다. 본 연구의 결과, 곰솔의 생육에 영향을 미치는 토양특성 중에서 토양경도는 여름을 제외한 모든 계절에 영향을 미치는 중요한 토양인자로 나타났다.
임석균,박인순,여환호,지재휴,김영균,김수관 大韓顎顔面成形再建外科學會 1997 Maxillofacial Plastic Reconstructive Surgery Vol.19 No.2
Despite the current accomplishments with the repair of cleft lips, the surgical management of the nasal deformity remains a functional and aesthetic dilemma for patients, their families, and reconstructive surgeons. Recent improvements in the understanding and technical execution of te primary cleft lip repair have significantly reduced secondary sequelae and the consequent need for secondary surgical correction. But, secondary surgical corrections are necessary according to numerous factors. Such factors include the secondary surgical corrections are necessary according to numerous factors. Such factors include the severity of the initial deformity, the surgical plan, precision of execution of the primary repair, and success of the postoperative management. We preformed the secondary correction of cleft lip and palate in 11 patients via various methods. In conclusion, primary repair of cleft lip and palate patients is the most important to prevent the secondary deformities, and most of cleft lip and palate with secondary deformities must be treated with combined cheiloplasty and rhinoplasty.
김석환,김석지,김기남,박인식 東亞大學校附設遺傳工學硏究所 1997 遺傳工學硏究 Vol.- No.4
파로부터 acid phosphatase를 Sepharcyl S-200 gel filtration과 CM-Sepharose CL-6B ion exchange chromatography 를 이용하여 부분정제하였다. p-Ni-trophenyl phosphate를 기질로 사용했을 경우에 최적pH는 5.5, 최적온도는 60℃였다. 효소의 활성화 에너지는 4.86kcal/mole이었다. 효소는 pH6.0에서 가장 안정하였으며, 50℃이하에서 대체로 안정하였다. 효소는 p-nitrophenyl phosphate를 기질로 가장 잘 이용하였으며, 5'-IMP와 5'-GMP는 기질로 거의 이용하지 못하였다. 효소는 p-nitrophenyl phosphate를 기질로 했을 경우에 ??값이 0.87mM이었다. Cr+++, Zn++, Cu++ 이온은 효소의 활성을 저해하였으며, 또한 molybdate와 metavandate 이온이 효소의 활성을 저해하였다. 그리고, NaCl의 농도가 높을수록 효소의 활성을 저해하였다. Acid phosphatase (EC 3.1.3.2) from welsh onion was partially purified by Sephacryl S-200 gel filtration and CM-Sepharose CL-6B ion exchange chromatography. The optimum pH and temperature of acid phosphatase from green onion were pH 5.5 and 60℃, respectively. The enzyme was the most stable at pH 6.0 and unstable above pH 9.0. The activation energy of the enzyme was determined to be 4.86 kcaL/mole. The enzyme utilized p-nitrophenyl phosphate most as a best substrate among tested possible substrates, while 5'-GMP and 5'-IMP were poor substrates for the enzyme. ?? of the enzyme with p-nitrophenyl phosphate as a substrate was identified as 0.87 mM. Among metal ions and inhibitors tested, Cr+++, Zn++, Cu++, molybdate and metavanadate ions inhibited the enzyme reaction drastically.
김기운,김시영,이종서,김철,정윤석 대한응급의학회 2001 대한응급의학회지 Vol.12 No.4
Background: In most cases of a foreign body in the esophagus, an ENT specialist is consulted, which may be time consuming if not evaluated in a timely fashion. The patients are admitted to the hospital and sent to the operating room, where they are placed under anesthesia and the object is removed by using an esophagoscope. Methods: A prospective randomized trial was conducted during the period from January 1998 to June 2000. All patients presenting to emergency department with blunt objects in the esophagus were included. In one group, with fluoroscopic guidance, a Foley catheter was placed to remove the blunt foreign bodies. And in the other group, we removed them by using the esophagoscpe. We used the t-test for statistical analysis in this study. Results: Total number of patients enrolled in this study was 38.22 patients were enrolled in the Foley Catheter removal group, and the remaining 16 were enrolled in the esophagoscope removal group. The success rate for the Foley catheter was 21/22(95.5%), and that for the esophagoscope was 15/16(93.8%). The average time of removal for the Foley catheter group was 0.70± 0.28 hours while that for the esophagoscope group was 5.96 ± 2.22 hours. One side effect, nonfatal hypoxia, was noted in the Foley catheter removal group. The average cost for the Foley catheter group were 78,800 won(approximately 600 US dollars) while that for the esophagoscope group took 722,800 won(approximately 600 US dollars). Conclusion: In our study, we found that the success rate for removing blunt foreign bodies from the esophagus by using a simple Foley catheter was high, also the Foley catheter was a time saving and cost effective procedure with an excellent safety profile.