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.

이동통신서비스시장의 기간통신사업자와 재판매 사업자간의 전략적 가격설정 및 무선접속망을 공유함에 있어서의 이용대가 산정방안

김환선 정보통신정책학회 2004 정보통신정책연구 Vol.11 No.4

본 연구논문은 이동전화서비스시장에 있어서 기간통신사업자와 재판매사업자간 복점경쟁하에서의 전략적 가격설정모델을 제시한다. 즉 두 사업자가 동시에 가격을 전략적으로 변경하는 유한반복게임을 통해 비협조적 게임하에서의 내쉬균형 가격을 유도 한다. 또한 가격과 서비스 품질에 대한 소비자들의 반응을 기반으로 소비자들의 서비스 선택과정을 시뮬레이션으로 구현함으로써 각 사업자의 수요 및 그에 따른 수익의 변화를 예측한다. 그 밖에도 본 연구논문은 두 사업자가 무선접속망, 즉 기지국의 무선채널을 공유하는 경우를 고려하여, 공유하는 무선채널부분에 대한 이용대가를 협상에 의해 산정하는 방안을 제시한다. 무선채널을 공유함으로써 추가수익을 얻는 재판매 사업자가 수익의 손해를 입는 기간통신사업자에게 보상금을 지불함으로써, 궁극적으로 기간통신사업자가 무선채널의 공유를 허용하게끔 유도하는 Win-Win 전략방안이다. 결과적으로 보상금의 형식을 통한 두 사업자간의 수익분배방식은, 무선채널 사용에 대한 대가를 산정함에 있어서 실제 사용한 트래픽량을 측정하여야만 하는 복잡함과 번거로움을 배제하며, 또한 이용대가를 산정하기 위하여 설비치 원가를 분석해야 하는 어려움도 극복할 수 있다는 장점이 있다. This paper models strategic pricing decisions between a common carrier and a reseller in a duopoly market of mobile telecommunication service. The model derives Nash equilibrium prices under the noncooperative and finitely repeated games. This paper observes demand and profit changes of each service provider, by simulating customers' decision-making processes given price and service quality. It also considers a situation in which the two service providers share wireless access channels of a base station and suggests a negotiation-based compensation method for sharing them. By inducing the reseller, who benefits from sharing the channels, to pay a side-payment to the common carrier, who looses from sharing the channels, they reach on an agreement to share the channels, which is a 'win-win' strategy. The profit-sharing mechanism based on the side-payment eliminates the complexity of metering the traffic using the channels and analyzing the relevant facility cost, which are usually required to estimate the cost of sharing the channels.

일본 애니메이션 영상 산업 연구

복환모 한국영화교육학회 2001 영화교육연구 Vol.3 No.-

A demand for the Japanese animation is on a remarkable rise, not only in the Japanese domestic market, but also in the worldwide animation market. Especially, the Japanese TV animation is currently assuming 65% of the animation being aired by TV broadcasters around the world. This thesis explorers the trends of and delves into the forms of Japanese animation industry, the leader of global market, in the context of "character" industry, which is a supplementary industry to the Japanese animation industry. Animation creates high added values vast in scope, encompassing related industries, including characters and games, that make the overall industry much larger in scope that it would have been otherwise. Whereas the Japanese animation production market is about 30 billion yen, including TV and movie theaters, in terms of monetary value, the market for characters is over 1 trillion yen within Japan alone. For instance, the <Pocket Monster> character market in Japan has reached a staggering 400 billion yen and 200 billion yen in revenues overseas. The market for the animation industry is spreading over more regions of the world by the day as it is linked with worldwide distribution network. The character industry is seeing a rise in product value thanks to the development of DVDs, games, and Internet. Thus, Japan views the animation industry and its supplementary character industry as the leading industries of the 21st century, the century of visual images, and is aggressively pushing for their development. Such efforts have been linked with the animation industry, including TV, movie theaters, and OVA that create characters, to allow the Japanese animation to add on its competitive strengths worldwide.

Transitional Butterworth-Chebyshev 近似式을 구하는 프로그램 開發에 關한 연구

金煥宇 충남대학교 공업교육연구소 1982 論文集 Vol.5 No.1

In this thesis, a computer program is developed to find the Transitional Butterworth-Chebyshev approximations. By using it, we can find any transitional approximation, including Butterworth and Chebyshev approximations, whose dimension ranges from 1 to 10 and which has the cut-off frequency of 1 rad/sec, ripple facter ε, and transition constant k which ranges from 0 to the dimension of the approximation, and we can get its magnitude and phase characteristics. As an example, five 8-th order approximations whose transition constants k's are 0, 2, 4, 6, and 8 respectively are presented, and their magnitude and phase characteristics are calculated.

한국 케이블 텔레비젼 프로그램의 호율적인 편성전략에 관한 연구

전환성 서강대학교 언론문화연구소 1996 언론문화연구 Vol.13 No.-

1920-1930年代 韓國 詩人들의 精神的 志向性의 考察 : 詩語에 나타난 ‘불’의 이미지를 中心으로

朴煥瑢 圓光大學校 文理科大學 國語國文學科 1982 國語 國文學 硏究 Vol.8 No.-

Image is one of the central structure of poetry. Image of poets is a sign rather than a symbol, and the sign represents being of present, past, and future, about things, happenings, and conditions:Image has an intention. According to theory of Poetic Imagination of a French scientific philosophist and metaphysician of imagination, Gaston Bachlard, this thesis intends to study the mental intention of Korean important poets from 1920s to 1940s through 'fire' image. As a result of study, we can see that reverie before fire has three directions by means of the chance of time; direction toward past, toward present, and toward future; reverie of recollection andrecurrence (So-Weol Kim, Jee-Yong Cheong), reverie of present diffusion(Yo-Han Choo, Jeong-Joo Seo), and reverie of transcendence (Yong-Wun Han, Doo-Jin park). This intends to study about intention of poets through 'fire' image symbolized by language in interrelationships of Korean poetry that plays a role of bridge between Korean modern poetry and Korean contemporary poetry.

막스 프리쉬 작품에 나타난 키치 현상

노환홍 서원대학교 인문과학연구소 2002 인문과학연구 Vol.11 No.-

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.

비감염성 설사

정환국,유재영 대한감염학회 1978 감염 Vol.10 No.1

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.