• 대한토목학회논문집
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• 제33권4호
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• pp.1499-1508
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• 2013

남극 암석의 동결-융해 풍화현상에 관한 연구를 위하여 테라노바 만 지역의 편마암을 대상으로 풍화등급에 따라 약한풍화(SW) 및 보통풍화(MW)로 분류하여 암석의 공학적인 특성 변화를 실험하였다. 동결-융해시험은 $-20{\pm}2^{\circ}C{\sim}20{\pm}2^{\circ}C$의 온도 조건에서 수행되었으며, 암석 시험편은 진공챔버에서 포화된 상태에서 5시간 동결과 5시간 융해 과정을 1 cycle의 동결-융해로 설정하였다. 본 논문에서는 전체 200 cycle의 동결-융해 과정을 진행하면서 20 cycle 마다 공극률, 흡수율, 초음파 속도 및 쇼어경도를 측정하였으며, 50 cycle 마다 일축압축시험을 수행하였다. SW 등급의 편마암은 동결-융해 1 cycle 마다 0.07 MPa 정도 일축압축강도가 감소하였으며, MW 등급의 암석은 0.2 MPa 정도 일축압축 강도가 감소하였다. 동결-융해가 200 cycle 진행되는 동안 SW 등급 암석의 흡수율은 0.23%에서 0.39%로 증가하였으며, P파 속도는 4,054 m/s에서 3,227 m/s로, S파 속도는 2,519 m/s에서 2,079 m/s로 감소하였다. 이와 유사하게 MW 등급 암석의 흡수율은 0.65%에서 1.6%로 증가하였으며, P파 속도는 3,207 m/s에서 2,133 m/s로, S파 속도는 2,028 m/s에서 1,357 m/s로 감소하였다. 동결-융해시험 결과, 남극 테라노바 만 지역의 SW 등급 편마암은 동결-융해가 200~300 cycle 반복될 경우 MW 등급 암석에 가깝게 풍화되는 것으로 밝혀졌다.

• 한국작물학회지
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• 제26권4호
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• pp.318-323
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• 1981

대두의 돌연변이육종을 함에 있어서 돌연변이기의 효율적인 선발법을 확립하기 위하여 M_1세대의 초장 및 주당종자수와 M_2세대의 돌연변이 출현과의 관계 그리고 M_1 식물체의 키메라에 대해 조사한 결과를 요약하면 다음과 같다. 1. 30kR의 감마선을 종자에 처리하였을 때 M_1초장의 분포는 무처리에 비해 45-68% 감소되는 개체가 전체의 63.7%를 차지하였으며 이 범위에 속하는 집단내에서 엽녹소변이는 71.4%, 가시적 형태변이가 62.3%를 차지하였다. 2. M_1주당종자수는 6-15개인 개체가 전체의 58.9%를 차지하였고 이때 엽녹소변이는 55.3%, 가시적 형태변이는 63.4%를 차지하였다. 3. M_1 집단에서 초장과 주당종자수는 통계적으로 유의한 정의 상관이 있었다. 4. M_1의 초장의 장해가 심하고 주당종자수가 적을 수록 M_2에서 가시적 형태변이의 출현율이 높았으며 반대로 엽녹소변이는 초장장해가 적고 주당종자수가 많을수록 변이출현율이 높은 경향이었다. 5. 변이가 일어난 M_2 family의 변이의 sector 크기는 M_1주당종자수 적을수록 크게 나타났다. 6. 엽녹소변이를 대상으로 M_1식물체의 꼬투리별로 돌연변이의 출리양상을 보면 식물체의 부위별로 일정한 경향이 없이 임의로 발생하였다. 7. 대두의 돌연변이육종을 효율적으로 수행하기 위해서는 종자에 고선량의 방사선을 처리할 것과 M_1의 주당종자수가 적은 개체를 수확하여 M_2에서 집단으로 양성할 것을 추천한다.

• Asian-Australasian Journal of Animal Sciences
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• 제8권3호
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• pp.301-305
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• 1995

The study was conducted at village level in Pabna milkshed areas of Bangladesh to asses the existing feed and fodder sources of cattle. The results showed that the overall number of cattle per farm family was 7.17 and chicken represents highest number (15.57) per farm family in this area. The results also indicated that during monsoon season the bathan is planted with Vigna mungo and Lathyrus sativus and average grazing hours per day varied from 1.1 in October to 5.6 in February. In Summer, they were offered naturally grown Cynodon dactylon with supplementary feeding of rice straw. The study further showed that the highest (65.7%) feed scarcity was found during mid April to mid May followed by mid June. The cultivation of Vigna mungo was highest (76.71%) compared to Lathyrus sativus by the farmers in the bathan areas. The major constraint to cattle production is the scarcity of quality feed during mid October to mid November.

• 대한수의학회지
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• 제9권2호
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• pp.19-25
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• 1969

The effects of some chemicals for the germinative stimulation of Clostridium chauvoei spore studied. The results obtained were as follows: 1. Cooked meat medium (CMM) was superior to Liver-liver bouillon (LLB) for cultivation of the organisms. 2. Heating the organisms at $70^{\circ}C$ for 30 minutes prior to cultivation in CMM stimulated the germination rate. 3. The addition of 0.5mM L-alanine to CMM was found to be most effective for the rapid germination of the spores. 4. The addition of 0.2 mM D-alanine to CMM inhibited the germination of the spores even if the spores were heat treated. 5. The addition of 0.1mM manganese retarded the germination time, but the final germination rate was greater with 0.1mM manganese than with 0.5mM L-alanine. 6. The addition of both 0.5mM L-alanine and 0.1mM manganese stimulated the germination rate to 100 per cent. 7. The germination rate was greater with the addition of germination stimulants than without any stimulants. The germination rate was approximately 6 per cent greater with prior heat treatment than without heat treatment. 8. The optimum time for the harvest of vegetative forms of the organisms was 15 hours after cultivation in the media which contain suitable germination stimulants.

• 대한방사선기술학회지:방사선기술과학
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• 제4권1호
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• pp.45-53
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• 1981

In examinations of the stomach roentgenography, it is imperative to obtain adequate film density throughout all its different regions. Therefore, it is necessary to use more sophiscated exposure techniques. In order to achieve these purpose, the radiologic technologists must be measured abdominal thickness in variations with patient positions. In consideration of these problem, the author was made an experiment on correction method of kVp and mAs by abdominal thickness in roentgenography of the stomach. The results were summarized as follws: 1. When the patient in erect position, abdominal thickness was the most thickened at the level of 3cm inferior to umbilicus without regard to body habitus and it was the most thickened at the level of 3cm superior to umbilicus in prone and supine position. 2. As a result of measuring film density for stomach, the adequate film density was represented from 0.70 to 2.49 in erect position and $0.28{\sim}1.18$ in supine position, $0.5{\sim}2.45$ in prone position. 3. In order to obtain uniform film density in 1.25, the correction factor for kVp by abdominal thickness was represented average ${\pm}4.5kVp\;per\;{\pm}1cm$ in a fixed 50 mAs, and average ${\pm}3.9kVp\;per\;{\pm}1cm$ in a fixed 100mAs. 4. In order to obtain uniform film density in 1.25, the correction factor for mAs by abdominal thickness was represented average ${\pm}30.9%\;per\;{\pm}1cm$ in a fixed 80 kvp and ${\pm}26.9%\;per\;{\pm}1cm$ in a fixed 100kVp.

• Journal of Biosystems Engineering
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• 제3권2호
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• pp.114-125
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• 1978

The use of petroleum fuels in grain drying causes problems of high cost and management. To solve these problems, it is required to study on soLar energy as an alternative to petroleum fuels for grain drying. The purposes of this study were to find out the optimum received area and air flow rate of a flat-plate solar air collector for grain drying and to assess its effects on grain drying with a small grain bin. The results of this study are summarized as follows ; 1. The calculated optimum tilt angles of the collector in the summer and autumn drying seasons were 20 and 50 degress, respectively, in suwon area. 2. The outlet temperature of the collector was $36^\circ C$ on the daily average with the maximum of $36^\circ C$ at 12:00 o clock. Solar radiation on the collector surface was 1.04 ly( 1 langley = 1 cal/$cm^2$) per minute on the daily average and 1.30 ly per minute on the maximum at 11:00am. The thermal efficiency of the collector was 62.4 percent on the daily average, and the air flow-rate per unit receiving are was 1.03 $m^3$/min/$m^2$.4. The calculated optimum receiving area and the air flow-rate per unit cubic volume for paddy in autumn drying season was 2 $m^2$ and 2$m^3$/min , respectively. 5. not significantly difference in the collector efficiency was appeared between the rotating and fixed type of solar collector. 6. For drying of wheat with 0.6 meter of the depth in the bin, approximately 9 hours were required to reduce the moisture content from 21.6% to 13% with air follow rate of 5 $m^3$/min an initial moisture per cubic meter of wheat and with air temperature of $52^\circ C$. 7. In the drying test of rough rice with a turning operation in a grain bin approximately 21 hours were required to reduced the moisture from 21% to 14.5% with airflow rate of 2 $m^3$/min per cubic meter of rice and the air temperature of $43.5^\circ C$. 8. Over-drying at the bottom and less -drying at the top of the grain mass was resulted from the high -temperature of drying air which was obtained from the flat-plate solar collector in this test. An appropriate operation should be prepared for the uniform moisture of the grain in the bin.

• 지역사회간호학회지
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• 제1권1호
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• pp.107-114
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• 1989

기존의 통계자료를 이용하여 1985년과 1986 년의 부산 경상남도 지역 보건소를 중심으로 본 보건간호사의 사업 활동에 대한 조사연구는 다음과 같았다. 1. 연도별 사업분야별 간호사 수 사업분야별 간호사 수는 1985년, 1986년 모두 부산지역은 가족계획 사업에, 경남지역은 진료실 사업에 활동하는 수가 가장 많았다. 2. 연도별 보건소당 인구수 부산지역의 보건소당 인구수는 1985년에 351,681명에서 1986년의 357,884명으로 dir간 증가하였고, 경남지역은 1985년에 130,247명, 1986년의 130,252명으로 비슷하였다. 3. 연도별 보건간호사당 인구수부산지역의 보건간호사당 인구수는 1985년의 30,008명에서 1986년에는 31,120명으로 증가하였으나, 경남지역은 오히려 1985년에 22,590에서 1986년에 16,747명으로 감소하였다. 4. 연도별 사업분야별 활동 상황 연도별 사업분야별 활동 상황에서 부산지역은 가족계획사업을, 경남지역은 영유아 보건사업을 가장 많이 하였다. 5. 연도별 사업분야별 간호사당 인구수 부산지역은 1986년 모자보건 사업 대상자 수가 353,665멍으로 가장 많았으며, 경남지역은 1985년에 모자보건 대상자가 46,220명으로 가장 많았다. 6. 연도별 사업분야별 간호사당 관리된 수 사업분야별 간호사당 관리된 수는 부산 경남지역 모두 모자보건 사업이 가장 많이 관리되었다.

• 한국약용작물학회지
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• 제11권2호
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• pp.109-114
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• 2003

제주도에서 쇠무릎의 뿌리와 포과의 생산을 위한 적정질소시비량을 구명하고자 재식밀도(50, 100주/$m^2$, 1주 2본)와 질소시비량(0, 6, 12, 18, 24, 30 kg/10a)에 따른 생육, 건물수량, 지상부 질소 함량 및 수량 등을 조사하였던 바 그 결과를 요약하면 다음과 같다. 조사한 모든 형질에 대하여 재식밀도와 질소시비량 간에는 상호작용이 없었다. 100주/$m^2$ 재식구에 비하여 50주/$m^2$ 재식구에서 주근장 및 뿌리수는 각각 5%와 52%증가되었고 경엽의 질소함량은 다소 낮았으나 다른 형질에서는 차이가 없었다. 질소시비량은 주경직경, 주당 화서수, 화서당 포과수, 주근장, 주근직경, 포과 질소함량에 영향을 미치지 않았다. 질소시비량이 10a당 0 kg에서 30kg으로 증가함에 따라 SPAD 값은 35.0에서 40.5로, 경엽의 질소함량은 1.09%에서 1.38%로 직선적으로 증가되었다. 질소시비량은 초장, 주당 분지수, 포과 뿌리 건물수량, 주당 근수, 경엽질소수량에 대해서는 2차함수식으로, 주당 화서수에 대해서는 3차함수적인 관계로 분석되었다. 이러한 분석결과 포과 및 뿌리 건물수량이 최대가 되는 질소시비량은 21kg/10a로 추정되었다.

• Journal of Plant Biology
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• 제13권3호
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• pp.1-16
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• 1970

Field studies were conducted with kusabue variety and factorial design of 12 treatments composed of 3 levels, 10 kg, 15 kg and 20 kg of N per 10 a , and 4 levels of 80, 100, 120, and 140 hills per $3.3m^2$ plot in reclaimed slaty area having an average of 0.48% salt concentration. The law of spacing effect was observed in the increase of the number of stems at any application levels of N, and the increased N application exceeding 15 kg N per 10 a did not increase the number of stems in maximum tillering stages. The light recieving efficiency of plant population was greatly reduced by close planting when compared with the effect of increased N applications in heading stage. The spacing effect on the C/F ratio was not noted but was reduced markedly by the increased N applications, accordingly the spacing effect on rough rice yields to the LAI was less than by the increase N application. Closer spacing increased the number of panicle, and non-effective stems, decreased the number of grains per panicle and panicle weight. The increased N applications also increased the number of panicle, reduced the weight of 1,000 grains and the ratio of matured grains. It was recommended to plant 100 hills per $3.3m^2$ with the application of 15 kg N per 10 a in the reclaimed salty area of Korea.

• 한국농촌건축학회논문집
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• 제14권1호
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• pp.21-28
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• 2012

Campus facilities were recently remodeled to provide the substantial learning rights of handicapped students in many campus to embody the dignity and value as man. So this study aims to identify the exterior connection facilities for handicapped students of S and D campuses. The summaries of this research are as follows. Installations of even crossing area(1.5mx1.5m) per 50m and even rest area(1.5mx1.5m) per 30m in walking or access ramp. Improving in accordance with exterior connection facility repairing master plan in S campus. Bringing down an angle degrees of the inclined walking or access ramp in D campus. Installation of exterior braille guide sign for blind students. All handicapped students must be guaranteed the same learning rights as normal men to remove obstacles as the upper mentioned imperfections in using exterior campus facilities.