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      • KCI등재
      • SCOPUSKCI등재

        작물에 흡수된 방사성 동위원소의 내부조사효과에 관한 연구 (제8집) - P-32 용액에 침지한 (浸漬) 대맥종자의 (大麥種子) 발아 및 유식물의 (幼植物) 생장에 관한 연구

        응용(Eng Yong Son),김길환(Kil Hwan Kim),종환(Jong Whan Cha) 한국식물학회 1969 Journal of Plant Biology Vol.12 No.3

        Through immersing barley seeds (variety; Suwon No. 6) into different dilution of carrier-free P-32 original solution (Total activity; 90mc. To; 3/21) for 24 hours at room temperature, four groups of seeds (each group consists of 200 seeds) having activity levels of 1.6×10 exp (-3) μc ^(32)P/grain, 2.3×10 exp (-1) μc ^(32)P/grain 6.9×10 exp (0) μc ^(32)P/grain and 2.5×10 exp (1) μc ^(32)P/grain respectively, were obtained. To investigate the effects of various activity levels of P-32 absorbed upon the test plants, the seeds were germinated, transplant into the pots, and the growth was observed for three months after germination. After harvest, the inorganic contents in the leaves and the stems were also analyzed. The results: 1) Until four days after the beginning of germination, the rate of germination was found the lowest at the strongest activity level of 2.5×10 exp (1) μc/grain. At the other P-32 levels treated, it showed generally higher than the control. 2) Before transplanting the seedlings of both 1.6×10 exp (-3) μc/grain and 2.3×10 exp (-1) uo/grain levels showed more vigorous growth than the control, whereas at the 6.9×10 exp (0) uc/grain level a retarded growth was conspicuous and all of plants belonging to the highest activity level of 2.5×l0 exp (1) μc/grain were withered owing apparently to the radiation damage. 3) This trend of growth promotion was continually observed at the low activity levels even after transplanting the seedlings to the pots. As for the plants belonging to 6.9×10 exp (0) μc/grain level, a clear sign of graduai recovery from the damage afflicted at the earlier stage was observable, and as a result the plants showed more growth than those of control two months after transplanting. 4) The number of stems diverged was found somewhat small in the blocks treated with P-32, compared with that of control until two months after germination. At the later stage of growth there seemed no significant difference among themselves. 5) The dry weight of leaves and stems was proved that the lower the activity, the more it was produced. The relative increase of dry matter in each treatment compared with the control was 2% at 6.9×10 exp (0) μc/grain level, 9% at 2.3×10 exp (-1) μc/grain and 35% at 1.6×10 exp (-3) μc/grain respectively. 6) The inorganic contents of the leaves and stems harvested were proved that: (1) Nitrogen was highest at the lowest activity level of 2.3×10 exp (-1) μc/grain. (2) Phosphorus showed generally higher contents in the treated blocks than in control, with the peak being at 2.3×IO exp (-1) μc/grain level in the leaves and at 6.9×10 exp (0) μc/grain in the stems. (3) These was no significant difference in potassium contents in the leaves between treatment and control, whereas in the stem the trented blocks were higher than control roughly in propotion to the activity level. (4) Calcium in the lesves was richer in treated blocks than control while in the stem no difference was seen. (5) Magnesium contents both in leaves and in stems there was no difference among treatments.

      • KCI등재
      • SCOPUSKCI등재

        작물에 흡수된 방사성 동위원소의 내부 조사효과에 관한 연구 (6) - 아마의 (亞麻) 생장에 미치는 P-32 의 영향

        응용(Eng Yong Son),김길환(Hwan Kil Kim),종환(Jong Whan Cha),전정일(Chung Il Chan) 한국식물학회 1969 Journal of Plant Biology Vol.12 No.1

        To investigate the effects of internal radiation of various intensity on the test crop(flax), seeds of four levels of activity(15.5×10 exp (-4) μc/grain, 9.O×10 exp (-2) μc/grain, 2.2×10 exp (0) μc/grain and 3.8×10 exp (1) μc/grain) which had been obtained by immersing them into various concentrations of P-32 original solution (total activity: 90 mc, To: 3/21) for 24 hours at room temperature, were germinated, transplanted later into pots, and the rate of germination and the successive growth were observed, and the inorganic conents of the plant top were analyzed. The results are as follows: 1. At the early stage of germination, the plants manifested themselves both inhibitory and promotive effects at higher and lower activity levels respectively, compared those of the control. These difference of growth on account of different levels of activity appeared, however, to be gradually narrowed in the course of time after germination, except at the highest activity. 2. Two weeks after transplanting, the plants of the lowest activity showed more vigorous growth than those of control. The plants belonging to the other activity levels on the other hand, tended to be less growing, the higher the activity. However, this growth gap between treatments seemed to be progressively closed one month after transplanting. 3. Most of the leaves and stems of the plants belonging to the highest activity level (3.8×10 exp (1) μc/grain) were withered during the early stage of growth, and this damage did not recover. 4. Practically no difference of growth was observed among treatments(excluding that of highest activity) one and half months after transplanting. 5. The fluorescence tended to be more delayed than the control, as the activity decreased. 6. There was a tendency that the number of pods harvested were larger in the plants treated with P-32 than that of the control. 7. The proportion of fiber in the plants at harvest appeared to be larger at lower activity and smaller at higher P-32 concentration than that of control 8. As for the inorganic contents of the plant top harvested the following tendency was observed: (1) Nitrogen content was highest at the highest activity level at which the poorest growth ensued. (2) There was no clear difference of phosphorus content among treatments. (3) The contents of potassium and magnesium were higher than control at the medium levels of activity. (4) Calcium content of all treated blocks was found to be more than that of control.

      • KCI등재
      • KCI등재

        고해상도 위성영상의 반복 정밀 기하보정

        종환 ( Jong-hwan Son ),윤완상 ( Wansang Yoon ),김태정 ( Taejung Kim ),이수암 ( Sooahm Rhee ) 대한원격탐사학회 2021 大韓遠隔探査學會誌 Vol.37 No.3

        최근 많은 영역에서 고해상도 인공위성의 활용이 증가하고 있다. 안정적으로 유용한 위성영상을 공급하기 위해서는 자동 정밀 기하보정 기술이 필요하다. 일반적으로 위성영상의 기하보정은 정확한 지상좌표와 영상좌표와의 대응점으로 설정된 지상기준점을 이용하여 기하학적인 왜곡을 보정한다. 따라서 자동으로 정밀기하보정을 수행하기 위해서는 높은 품질의 지상기준점을 자동으로 획득하는 것이 핵심이다. 본 논문에서는 처리할 고해상도 위성영상과 지상기준점 칩의 영상 피라미드를 구축하고 영상 피라미드의 각 층에서 위성영상과 지상기준점 칩 간 영상정합, 오정합점 탐지, 정밀 센서모델링을 반복적으로 수행하는 반복 정밀 기하보정 방안을 제시하였다. 해당 알고리즘을 통해 자동으로 높은 품질의 지상 기준점을 자동으로 획득하고 이를 바탕으로 고해상도 위성영상의 기하보정 성능을 향상시키고자 하였다. 제안한 알고리즘의 성능을 분석하기 위해 KOMPSAT-3 및 3A Level 1R 영상 8 Scene을 사용하였으며, 수동으로 추출한 검사점을 이용하여 정확도 분석을 수행한 결과 평균 1.5 pixel, 최대 2 pixel의 정확도의 기하보정 성능을 확인할 수 있었다. Recently, the use of high-resolution satellites is increasing in many areas. In order to supply useful satellite images stably, it is necessary to establish automatic precision geometric correction technic. Geometric correction is the process that corrected geometric errors of satellite imagery based on the GCP (Ground Control Point), which is correspondence point between accurate ground coordinates and image coordinates. Therefore, in the automatic geometric correction process, it is the key to acquire high-quality GCPs automatically. In this paper, we proposed iterative precision geometry correction method. we constructed an image pyramid and repeatedly performed GCP chip matching, outlier detection, and precision sensor modeling in each layer of the image pyramid. Through this method, we were able to acquire high-quality GCPs automatically. we then improved the performance of geometric correction of high-resolution satellite images. To analyze the performance of the proposed method, we used KOMPSAT-3 and 3A Level 1R 8 scenes. As a result of the experiment, the proposed method showed the geometric correction accuracy of 1.5 pixels on average and a maximum of 2 pixels.

      • SCOPUSKCI등재

        작물에 흡수된 방사성 동위원소의 내부조사효과에 관한 연구 (제7집) - 대두의 (大豆) 생장에 미치는 P-32 의 영향

        김길환(Kil Hwan Kim),응용(Eng Yong Son),종환(Jong Whan Cha),김정제(Jung Jai Kim) 한국식물학회 1969 Journal of Plant Biology Vol.12 No.3

        To investigate the radiation effect of P-32 on the soybean plants, the seeds treated with various levels of P-32 solution were sown and cultured in the pots. The growth of the plants and the contents of the macroelements were observed and the following results were obtained. 1) The linear growth of the plants at the early stage seemed to have been promoted by the low-level P-32 treatment. At the later growing stage, however, this difference among treatments were less conspicuous. 2) The plants of high level P-32 application showed some growth damaging symptom at the early growing stage. Later this damage was recorded as the time went on and these plants showed even better growth than the control. As a result at the late growing stage, they ensued highest growth. 3) The plants showed in general more growth at the low activity level than at the high-level at the early growing stage. At the late stage, however, the high-level activity promoted more growth than the low-level. 4) At the early growing stage P-32 treatment produced in general significantly more lower than control. At the later stage, however, this difference was not clearly seen. 5) The P-32 treatment seemed to have stimulated earlier florescence and this tendency was more clearly observable especially at the high activity level. 6) The weight of the air-dried seeds tended to be increased through P-32 treatment by 10-45%. This tendency was clearly observed especially at the low-level activity. 7) As for the contents of the various macroelements in the leaves, the nitrogen showed significantly larger contents at the middle level(S_1) P-32 treatments. The phosphorous contents showed also highest at the middle levels activity and lower both at the high and low-activity levels. The potassium contents was proved, on the contrary, higher at the low-level activity and lower at the high-level. 8) The nitrogen contents in the stems was found significantly higher than control, except at the low-activity level. The phosphorous showed higher contents at the low-activity level and no significant difference at the high-activity level. As for the contents of potassium, calcium and magnesium, there seemed no significant difference among treatments. However, the magnesium showed somewhat higher content at the low-activity level, whereas the calcium was proved higher than control. 9) The inorganic contents in the root showed that N and P in the P-32 treated plant were significantly higher than the control and the K-contents was, on the contrary, significantly higher at the control than the rest of the treatments. As for the calcium and magnesium there showed no difference among all treatments.

      • KCI등재후보
      • KCI등재

        現代法治行政의 構造

        孫鐘煥 啓明大學校 社會科學硏究所 1986 한국사회과학연구 Vol.4 No.-

        The kernel of the whole subject of administrative law is the control of power within its lawful compass. The law is employed not just to disqualify unlawful excercise of power, but also to compel the performance of legal duties which have been neglected. The purpose of this paper therefore, is to attempt to provide an overall view of the subject, setting all the parts or administrative law in their proper place and in relation to each other. It aims to stress the main function of administrative law, which is the control of power, and the maintenance of a fair balance between the competing interests of the administration and the citizen. In this paper it is proposed to examine the part in our law played by special tribunals and procedures. They are an important part of our modern administrative and legal system. But they, as well as all other inferior institutions in the state, always remain subject to the overall power of judicial review in the ordinary superior courts. This is not to say, however, that the purpose of administrative law is to stifle administration. By the proper exercise of the court's supervisory power illegar power is excised, but this loaves the legal use of power untouched. Thus the practice of administrative law should lead to the assistance of good administration, and positively to encourage administrative powers only to be validly exercised.

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