林土의 有機物의 分解速度와 無機養料의 垂直分布에 關한 考察

金遵敏,張楠基,鄭玩鎬 서울대학교 교육대학원 학술연구회 1966 論文集 - 서울대학교 교육대학원 Vol.3 No.-

Kim Choon Min, Chang Nam Kee and Chung Whan Ho: Decomposition rate of plant residue and the vertical distibution of mineral nutrients in the woodland soil. The relationship between decomposition rate of litter and the amount of mineral nutrients dispersed to the soil horizons were studied on the oak and pine forest stand. The results are as follows: 1. Decomposition rate of litter was highest in the F horizon of the oak stand, however in the pine stand it was highest in H horizon. 2. The correlation coefficients between decomposition rate and humus, organic carbon, moisture content, calcium, phosphorus, and nitrogen in the pine stand are; 0.90, 0.98, 0.76, 0.98, and 0.88, in oak stand; 0.97, 0.93, 0.92, 0.97, 0.74 and 0.73. 3. Factors which affect the decomposition rate of litter are humus, organic carbon, moisture content, calcium, phosphorus and nitrogen. 4. Among the variables, PH, moisture content and phosphorus under the oak and pine forest showed significant differences in each horizon. 5. C/N ratio of pine stands is higher than that of oak stands studied. 6. The vertical distribution of mineral nutrients is highly related with the amount of humus accumulated on top soil.

계몽주의 시대의 비극과 도덕 개념

노환홍 서원대학교 인문과학연구소 2003 인문과학연구 Vol.12 No.-

GIS에서의 공간 조인 기법의 관한 고찰

황환규,김상욱 강원대학교 정보통신연구소 1998 정보통신논문지 Vol.2 No.-

The spatial join operation is one of the fundamental spatial database query operations. It facilitates the retrieval of information from two different spatial objects based on spatial relationships. The join is one of the most difficult operations to implement efficiently in spaital database systems, as it was with relational database ststems. In this paper, different kinds of spatial joins and various implementation techniques are surveyed. We investigate the basic idea, algorithms, and performance of the various spatial join techniques. In addiotion, we discuss the issues of the different spatial join techniques.

전기충격요법 사용에 관한 정신과의사의 견해 및 실시현황

정환증,변원탄 大韓神經精神醫學會 1983 신경정신의학 Vol.22 No.4

한국 정신과 의사 211명의 전기충격요법에 관한 의견을 다음과 같이 요약할 수 있었다. 1. 735가 치료방법으로서의 전기충격요법을 찬성하는 태도였고, 찬성하는 가장 큰 이유로서는 적응증만 잘 고려된다면 일반적으로 우수한 효과를 볼 수 있다는 것이었다. 그러나, 그 실제적인 사용에 있어서는 다수에서 조심스러운 태도를 보이고 있었고, 어떤 견해에 있어서는 미국의 정신과 의사들보다 훨씬 더 소극적인 태도를 가지고 있었다. 2. 전기충격요법의 적응증에 관한 한 역시 예상한 바와 같이 주요 우울장애, 조증 흥분, 정신분열증의 순으로 찬성하는 경향이 많았고, 이 방법을 선택한 이유로는 '응급처치로 시행하거나' 다른 치료방법에 실패했거나' '보다나은 결과를 얻기 위한 병용 치료로서 선택' 등이 가장 많았다. 3. 정신분열증에서의 전기충격요법은 사용의 한계를 나타내고 있었다. 4. 시행 이전의 동의나 시행 전 감사에 대해서는 비교적 엄격한 태도를 유지하고 있으나, 연성 전기충격요법, 편측 전기충격요법의 활용은 적었으며, 강력 또는 유지 전기충격요법 역시 시행율이 낮은 편이였다. 시행빈도는 79%가 주2-3회를 실시하는 것으로 나타났고, 향정신약물을 사용하던 환자에서 전기충격요법을 시행한 경우, 대체로 약간의 약물 감량을 실시하는 것으로 나타났다(59%) 5. 전기충격요법 시행 이후의 합병증으로는 골절이나 탈구, 직업 수행 능력에 영구적인 장애, 자발적인 경련 발작 등이 예상외로 많아 합병증은 역시 소홀히 할 수 없는 문제임을 나타내 보였으며, 전기충격요법 이후 24시간이내 사망을 경험한 예가 6경우가 있었다. The authors of this suveyed the opinions of 211 Korean psychiatrists about the use of Electoconvulsive Theraoy(ECT). The results of the survey are summarized as follows; 1. ECT was accepted with a favorable attitude by 73% of the psychiatrists surveyed. The most common reason for agreement was that if indication is followed the ECT generally produces excellent results. But in actual clinical practice most Korean psychiatrists are hesitant in preforming the ECT and have a somewhat less active attitude towards ECT than psychia trists in America. 2. The major indications for theuse of ECT were major depression, manic excithment and schizophrenia in the order of their frequency. The main reasons for the selection of ECT as a therapeutic tool were emergency therapy, when all other treatment methods have failed and as a combined treatment that can. 3. The use of the ECT for the treatment of schizophrenia was very limited for a few selected cases. 4. Korean psychiatrists showed relatively rigid adherence to obtaining the consent before ECT and the preoperational work-up. The softening and unilateral ECT had received little use in Korea and a similar tendency was shown towards intensive and maintenance ECT. Most psychiatrists(79%) tended to use the ECT 2 or 3 times a ewek with a majority of their patients. In cases where the ECT was used in concomitant with antipsychotic drug therapy, there showed a tendency for a slight reduction in drug dosages during the ECT. 5. Post-ECT complications and/or adverse effects were fracture, dislocation, premanent disability in occupational performane and spontaneous seizures etc. Occurrences of above complications seem to be mlre than expected in this study and this was not negligible. A total of six patients were known to habe expired within twenty-four hours after ECT.

B+트리를 위한 벌크로드

황환규,김상욱 江原大學校 産業技術硏究所 1995 産業技術硏究 Vol.15 No.-

In this paper, we propose a bulk-load algorithm for B' -trees, the most widely used index structures in database systems. The main characteristic of our algorithm is to simultaneously process all the keys to be placed on each B' -tree page when accessing the page. This avoids the overhead for accessing the same page multiple times, which results from applying the B' -tree insertion algorithm repeatedly. For performance evaluation, we analyze our algorithm in terms of the number of disk accesses. The results show that the number of disk accesses excluding those in the redistribution process in identical to the number of B' -tree pages. Considering that the redistribution process is an unavoidable preprocessing step for bulk-loading, our algorithm requires just one disk access per B' -tree page, and therefore turns out to be optimal. We also present performance tendancy according to the changes of parameter values via simulation.

사범대학 신입생의 배경 및 특성 -1984년도 충북대학교 신입생 실태조사에 나타난-

강환국 忠北大學校 學生生活硏究所 1985 學生生活硏究 Vol.9 No.-

본문참고

영화「쇼생크 탈출」의 표현형식에 대한 연구

복환모 호남대학교 1998 호남대학교 학술논문집 Vol.19 No.2

The purpose of this study is to analyze several scenes of the film to see its technique and the intention to use them. 「THE SHAWSHANK REDEMPTI0N」 is a film to describe the will of a man under the restriction to recover the freedom. The director, Mr. Frank Darabonts, shows formulated scenes consistently to represent a man's strong will to get out of the unfair suffering by the power in the film. In the film the camera lens symbolizes a wall of prison. Andy and Red, the characters in the film, are showed at the close distance by the medium shots. The audience can feel a kind of restriction by these shots. But he describes the free space which Andy feels after breaking the prison by the long shots. Various forms of expression are formulated for the motive and used to describe the theme of a film and express its mood.

CSPAM: 닫힌 빈발 시퀀스 패턴을 위한 효과적인 가지치기 전략

황환규 강원대학교 정보통신연구소 2009 정보통신논문지 Vol.13 No.-

Sequential pattern mining finds all of the frequent sequences satisfying a minimum support threshold in a large database. However, when mining long frequent sequences, or when using very low support thresholds, the performance of currently reported algorithms often degrades dramatically. In this paper we present a novel algorithm, CSPAM (Closed Sequential PAttern Mining), using only closed frequent sequences which are small subset of very large frequent sequences. When systematically exploring the search space of closed frequent sequences, we present two novel pruning strategies, which prune the unpromising parts of search space effectively. The experimental results show that the proposed method outperforms the previous algorithms.

신문산업과 저작권

전환성,김영호,최정호 연세대학교 언론연구소 1992 언론 사회 문화 Vol.- No.2

비감염성 설사

정환국,유재영 대한감염학회 1978 감염 Vol.10 No.1