鐵原地區 自然草地에 대한 群落構造 生産性 再生力 및 土壤肥料學的 硏究

尹益錫,張楠基,金炳泰 건국대학교 1969 學術誌 Vol.10 No.1

The investigation was made on the relationship among vegetation, net productivity, regrowth and soils of Moonheri-Wasoori, Soodowon-Sungilkyo and Mt. Kumhak grasslands in Chulwon area. The following conclusions have been made as the results of study. 1.The vascular flora of the grassland in Moonheri-Wasoori was composed of 102 species, the most of which were Medicago denticulata, Miscanthus sinensis, Arundinella hirta, Festuca ovina and Cassia nomame. 2.The flora of Soodowon-Sungilkyo grassland was composed of 74 species, the most of which were Arundinella hirta, Miscanthus sinensis, Carex nanella, Festuca ovina and Cassia nomame. 3.It of Mt. Kumhak grassland was composed of 78 species, the most of which were Arundinella hirta, Carex nanella, Festuca ovina, Miscanthus sinensis and Aster scaber. 4.These five species contributed greatly to the standing crop of live material which was in excess of 60% of it. 5.The peak standing crop of each 413.7, 307.6 and 348.7 g/m2 in Moonheri-Wasoori, Soodowon-Sungilkyo and Mt. Kumhak grasslands wers reached in August under flooded conditions as a result of the growth of dominant species, Medicago denticulata and Arundinella hirta. 6.The net prodution of organic matter was slight in some intervals but occurred throughout the growing season. 7.After cutting of grasses, the regrowth of new leaves mainly depended on growing stage and edaphic factor. 8.Characteristics of the natural grassland soils, especially, concerning water, total nitrogen, available phosphorus and exchangeable calcium were clarified and might be depend upon the quantity of plant production. 9.Nitrogen, phosphorus and calcium concentration of leaves of Medicago denticulata, Arundinella hirta and Miscanthus sinensis were higher than of stems. 10.Even if there were differences in the amounts of nutrients amend Medicago denticulata, Arundinella hirta and Miscanthus sinensis for single species and stands, they were covered by variations within spesies in the present survey.

自然 草地의 草生 改良에 관한 硏究<第3報> : -Red Clover의 初期 生育에 미치는 燐酸의 效果 -

尹益錫 건국대학교 1968 學術誌 Vol.9 No.1

This experiment was carried out to study the effects of seven different levels of super-phosphate on the yeild and early growth of red clover. The results obtained are summarized as follows. ① Level of supply of super-phosphate had no effect on the germination of red clover. ② No appreciable growth has been detected when no phosphate was applied. Growth rate of toed clever of all treatment was almost nil after middle of October. ③ Rate of growth and the productivity were significantly increased as the level of phosphate increased. Linear relationships were found between dry matter content and height, and petiole length of Red clover. ④ Content of available phosphate has increased as the level of phosphate applied increased.

飼料資源開發을 위한 雜灌木樹葉의 飼料價値와 韓牛의 放牧利用에 關한 硏究

尹益錫,陸完芳,李仁德,曺圭燉,金炯基 건국대학교 1978 學術誌 Vol.22 No.1

As a part of forestry utilization for livestock feed resources the feeding value ague of shrub leaf by growth stage and grazing behabiour of the native cattle at shrubby grassland in function of seasons were investigated and the following results were obtained. 1. The crude protein content of oak leaf declined as the growth stage increased whereas the contents of crude fiber and crude fat showed the opposite tendency. 2. The intake of oak leaf paralleled with the amount given while the intake of the mixed grass leas remarkable increased and the body weight gain was also remarkably increased. 3. The average number of oak leaf intake was 70.5 times for spring, 148.7 for summer, and 395.7 for autumn. 4. The grazing time by the native cattle was decreased in the order of spring, autumn, and summer. As for the grazing behaviour, the intake activity was most active during morning, mid-day and late afternoon or three times a day. 5. The duration of rumination was found to be in the decreasing order or summer, autumn and spring, cattles ruminated more when the grasses were more abundant. 6. As for the inactive period of animal, it was short during spring when the animals spent more time for eating but it was about 5 times longer during both summer and autumn.

몇가지 植物의 棲息地 造成에 關한 硏究

윤종선,김익환,신세균,심우경,이철희,신영철 韓國植物ㆍ人間ㆍ環境學會 1999 인간식물환경학회지 Vol.2 No.2

종의 棲息密度가 낮아지고 있는 하늘나리, 섬초롱, 자란 3종의 식물을 인위적으로 棲息地를 造成하기 위하여 국립공원 속리산 등산로변 標高 200m, 400m, 600m 지점에 150주식 종당 450주를 조직배양 및 분주에 의하여 육묘 된 묘를 이식하여 생존상태 및 棲息地 造成의 가능성을 2년에 걸쳐 검토한 결과는 다음과 같다. 1. 造成 棲息地의 토양의 理化學的 造成은 pH 5.2∼5.6, 유기물 함량 29∼54g/㎏, CEC 9.4∼11.5㎝ mol(+)/㎏으로 산성을 띠고 있었으며, 유기물 함량은 높은 편이었고, 염기치환용량은 낮았으나 비교적 우리나라 典型的 山地土壤의 理化學的 造成과 유사하였다. 2. 棲息地內 생장기간의 投光率은 標高 200m 지역은 10.8∼11.6%, 400m lw역은 10.8∼11.4%, 600m 지역은 11.0∼12.8%로 식재식물의 生長環境에 부족한 상태였다. 3. 식재 식물 수는 식재 후 활착율은 3종 모두 양호하였으나, 점차 감소되었으며, 특히 자란의 감소율이 높았다. 감소의 원인을 분석한 결과 하늘나리, 섬초롱, 자란 모두 굴취나 절취의 피해가 많았으며, 특히 자란은 凍害에 의한 枯死가 1년차 72∼86주, 2년 차에서 19∼35주로 조사도어 자연상태에서의 越冬은 어려운 것으로 나타났으며, 집중호우에 의한 流失도 감소의 한 원인이었다. 4. 식재식물의 생장상태는 불량하였는데 이는 投光量 부족으로 판단되어 棲息地造成時에는 錄陰期 投光量에 대한 사전 검토가 중요한 요인으로 나타났다. 5. 개화율은 섬초롱과 자란에서 높았으며 標高가 높을수록 개화기는 2∼4일 늦어지고 휴면기는 빨라지는 경향이었다. 식물 棲息地 造成時에는 造成 식물의 생장에 적합한 토양, 光環境 등을 고려한 위치 선정이 중요하며, 上層林에 의한 遮光으로 下層 초본식물 遷移速度가 빨라짐으로써 光環境 개선을 위한 上層林의 間伐, 周邊樹種의 更新이 요구된다. In order to make the artificial habitats of Lillium concolor, Campanula takesimana and Bletilla striata that the number of plant became sparse, 150 plants per species were transplanted at the region of 200m, 400m and 600m above sea level. And the growth of plants and the potential as habitats creation were analyzed. In the physical and chemical properties of soils in the there, soil pH was 5.2 to 5.6, organic matter content was 29 to 54g/㎏ and cation exchange capacity(CEC) was 9.4 to 11.5㎝ mol(+)/㎏. The transmittance rates of sunlight of the habitats during the growing periods were 10.8 to 11.6% in the 200m region, 10.8 to 11.4% in the 400m region and 11.0 to 12.8% in the 600m region. These transmittance rates were deficient for normal growth of plants. After the plants were transplanted, the survival rates of three species were high in common but the rates decreased gradually. Especially the decrease rate was high in the Bletilla striata. The causes of decrease were digging and cutting by climbers, sweeping asay by rainfall and freezing damage. Especially, the cold tolerance of Bletilla striata was weak in the natural condition. The growth of planted plants was poor, and it was assumed that the reason was shortage of sunlight transmittance. The flowering rates were high in the Campanula takesimana and Bletilla striata. And as the elevations were high, the flowering was later by 2 to 5 days but the dormancy was earlier. In the artificial making of plant habitats, the growth environment of plants have to be considered to choose the suitable region. And, because the habitats are shaded by the trees and bushes, the thinning of trees and the change of species are needs to improve the light transmission.

窒素質肥料의 種類 및 施用水準이 矮性 사과나무의 生長에 미치는 影響

尹益九 건국대학교 1991 대학원 학술논문집 Vol.33 No.-

This study was carried out to find the effects of four factors; kinds of rootstocks, composition ratio of nitrogen sources, kinds of nitrogen fertilizers, and amount of nitrogen supplied on (1)the total amount and the seasonal variation of mineral nutrients in leaves, and (2)growth rate of the branches and the stems of the dwarf apple tree, Malus demostica Borkh. Tested rootstocks were M9, M27, M26, MM106, M.sieboldii, and M.prunifolia. Utilized nitrogen sources were NH4 and NO3, and they were mixed by the following ratio- 100:0, 75:25, 50:50, 25:75, or 0:100. The applied nitrogen fertilizers for this study were urea, ammonium sulfate, ammonium nitrate, and calcium nitrate. Results obtained are summarized as follows: 1. Kinds of rootstocks Amount of N, P, K, Ca, in the leaves of the dwarf apple tree were decreased as dwarfness of rootstocks was increased. The M26 was found to be most, and both the M9 and the M27 were the second most effective rootstocks for the leaves to have high Mg content. Accumulated total amount of mineral nutrients in the leaves, regardless of kinds of rootstocks, were changed on monthly basis-N, P, K were decreased after June, and K was increased until July. Especially, K was increased until September by use of the M9 and the M27. 2. Composition raitoof nitrogen sources Lots of mineral nutrients - (1) N, P, K, Ca, Mg, Fe and (2)Mn- were found the leaves of the dwarf apple tree by the use of (1)both the third and the fourth mixture, and (2)the second mixture respectively. Especially, the last three mixtures of nitrogen sources found to be have much K in the leave than the others. The third and the fifth mixture of nitrogen sources showed higher growth rate of branches and stems of the drarf apple tree than the first one. But the most effective mixture was the fourth one. 3.Kinds of nitrogen fertilizers Amount of nitrogen in the leaves was the greatest by the use of urea, and the least by the use of ammonium nitrate. Also, the most and the leat amount of phosphate was found by the use of calcium nitrate and urea, respectively. Calcium nitrate was found to be effective fertilizer to increase Ca and Mn contents in the leaves, but all kinds of fertilizer than ammonium nitrate for growth of branches, but no significant result were found for growth of stems by application of each fertilizers. 4. Amount of nitrogen supplied Increased amount of nitrogen leaded to increasing amount of N and Mn in the leaves; however, P, K, and Mg were in the reverse pattern. There was no significant differences in the amount of Ca and Fe by applications of different amount of nitrogen. The growth rate of both branches and stems of the dwarf apple tree tended to increase as the amount of nitrogen supplied was increased.

치료저항 정신분열병환자에서 Clozapine의 효과 및 안전성

지익성,김영희,신석철,왕성근,신윤오,이선우,김정란 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2

In order to assess the efficacy and safety of clozapine, 50 in-patients with treatment-resistanat schizophrenia were evaluated using PANSS(Positive and Negative Symptome Scale for Schizophrenia), CGI(Clinical Global Impression), AMS(Abnormal Involuntary Movement Scale), Adverse Event-Somatic Symptoms, Neurological Rating Scale for EPS before and during treatment. Mean daily dosage of clozapine was 344.15±123.43mg at 12th week. A clinically significant improvement in positive, negative, and general psychopathology was noted as early as week 2 through 12 week. The tolerability of clozapine was generally found to be good. Drowsiness/sleepiness, Hypersalivation, and Constipation were the most common side effects. There was no neutropenia, and 3 patients suffered from seizures. These results suggest that clozapine is worth considering for the treatment-resistant patients

WLL 기지국용 다운 컨버터 설계

김윤영,문성익,허광삼,양두영 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.1

In this paper, A down converter to convert RF signal into IF signal is designed at the WLL basestation. It consists of low noise amplifier module and down mixer module. The low noise amplifier module is composed of threestage and a feedback circuit is added in the first-stage low noise amplifier in order to obtain unconditional stability and good flatness. The configuration of the down mixer module is a single-ended type gate mixer. For the good isolation characteristic of each port, a bandpass filter and a lowpass filter are inserted in the input and output port. To design the down converter without the IF power amplifier. it is important to maximize conversion gain. So the down converter of this paper is designed for the purpose of obtaining a high conversion gain. From the results, the IF output power is -12.68dBm when the LO and the RF power level are 7dBm and -80dBm. respectively. Also when the LO power level is 7dBm. PldB is -0.19dBm. and the RF input power range shows 70dB on wide operating range.

섬유판에서 음향방출원의 위치표정

박익근,김용권,윤종학,노승남,서성원 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-

음향방출 신호를 이용하여 목재 섬유판(fiberboards)의 위치표정의 유용성 유무를 실험적으로 검증하였다. 위치표정의 정확도를 향상하기 위해 신호처리 방법중의 하나인 웨이블릿 변환 디노이징 기법을 활용하여 저주파수인 대칭모드(굽힘파)를 활용하고, 고주파수인 비대칭 모드(팽창파)룰 제거하여 신호를 재구성함으로써 섬유판의 위치표정시 문턱값 통과방법을 사용할 때 발생하는 도달시간차를 최소화 할 수 있음을 확인하였다. 디노이징 기법을 활용한 섬유판의 위치 표정과 굽힘강도에 대한 사상총수를 기초로 하여 목재 구조물 및 문화재의 건전성을 평가 할 수 있을 것으로 기대된다.

흰쥐의 腹腔內에 投與한 C0^60 - Vitamin B_12의 臟器內分布 및 排泄에 관하여

張益柱,金圭秀,呂雄淵 慶北大學校 1964 論文集 Vol.8 No.-

Present study describes on the distribution of intraperitoneally administered Co^60-Vitamin B_12 in the liver, kidney and spleen, as well as its fecal excretion in the rats. The albino rats were administered 48.3μ㎎ of Co^60-Vitamin B_12 intraperitoneally and were sacrified by decapitation on the 3rd day after Vitamin B_12 administraion. The liver, kidney and spleen were removed and the rats' feces were collected every day for 3 days. The contents of Co^60-Vitamin B_12 in the liver, kidney, spleen and the feces were measured with the well type scintillation counter and the data were compared with the orally administered control group. The results were as follows; 1. The mean contents of Co^60-Vitamin B_12 in intraperitoneally administered rat's liver, kidney and spleen were 3-5 times more than those of control group. 2. Fecal excretion rate of intraperitoneally administered Co^60-Vitamin B_12 was markedly less than that of control group. And the total amount of excreted Co^60-Vitamin B_12 in feces was comparatively more than generally expected amount in the intraperitoneally administered group. 3. The authors were impressed that the absorption rate of intraperitoneally administered Vitamin B12 was significantly less than that of intramuscularly or intravenously administered Vitamin B_12, reported by other authors. 4. The above results indicate that a further study is necessary to prove the exact mechanism of absorption and fecal excretion of intraperitoneally administered Vitamin B_12.

실내 거실 사용자의 시각적 지각 반응에 관한 연구 : 공간 이미지를 중심으로 Focused on the Space Image

배정익,서동연,이윤규 대한건축학회 2004 대한건축학회논문집 Vol.20 No.11

A transactional approach was used to examine user's responses to living rooms. In experiment 1, 20 subjects evaluated a sample of 28 rooms on nine scale and ranked order the scales as to difficulty of application. A factor analysis yielded three room categories: Decorative, Stylish, and Familiar. Subjects found it easier to make affective rather than cognitive judgments. Experiment 2 examined the effects of relative involvement on responses to the three categories of rooms. 20 graduated students and 25 undergraduate students viewed the 6 rooms(two from each category) and rated each one on six 7-point scales and graduated students only wrote brief imaginative accounts of an episode which might take place in each room. The desire to live in a room was best predicted by perceived beauty and personal involvement. Familiar rooms were preferred most, while decorative rooms were seen as most informative about the person.