요소엽면살포(尿素葉面撒布)에 따른 수도(水稻)의 질소영양에 관한 연구

조성진 한국농화학회 1968 Applied Biological Chemistry (Appl Biol Chem) Vol.9 No.1

This experiment was carried out as a part of the studies on reasonable application of nitrogen in rice plant to determine: (Ⅰ) Nitrogen absorption. and rooting of rice seedlings as affected by urea foliar application at late seedling stage (Ⅱ) Effect of leaf prunning and foliar application of urea at late heading stage on the maturation and yield of rice (Ⅲ) Effect of foliar application of urea and its time during the stage of ear formation on yield of rice plant. Results obtained are summarized as follows. Exp.I: Nitrogen absorption and rooting of rice seedlings as affected be urea foliar application at late seedling stage. 1 : The foliar application of urea plots(T₁,T₂) snowed mare N-content than non-urea foliar application plot(T0) at lane seedling stage, being significant among treatments and foliar application of urea seemed more effective in increasing the N-content of seedlings. and promoted root settlement and early growth alter the transplanting. 2 : The carbon contents of the plants of T₁, and T₂ at late seedling stage increased than T_0, and the carbon contents. of T₁ and T₂ plots became higher in amount in proportion to the nitrogen absorption as compared with those of T0. 3 : C/N ratio appeared significant among soil application plots(N₁, N₂) and foliar application of urea plots (T₁, T₂ and T_0). C/N ratio was lower in case of increased amount of nitrogen. The higher contents of nitrogen and carbon and lower C/N ratio resulted in the increment of root numbers and root lengths. Exp.II: Effect of leaf prunning and foliar application of urea at late heading stage on the maturation and yield of rice. 1 : There was a highly significant decrease in the maturing rate by severe leaf prunning. In the mean time, significant increase in maturing rate was observed with urea foliar application and it was found the more frequent application the more effective for higher maturing rate with a moderate significance. A correlationship between the level of prunning and maturing rate was enumerated to 0.961 of correlation coefficient, which indicated an increased maturing rate by the increased number of remaining leaves. 2 : The 1.000 grain weight, grain weight and hulled rice yield increased by leaf prunning in order (plot a$lt;b$lt;c$lt;d$lt;e) at the plots where upper single(a), two(b), three(c), four(d) and five leaves(e) remained, respectively, as compared with control plot(f), thus the high significance were observed among the leaf prunning. Correlation coefficient(r) of 0.925, 0.971 and 0.989, respectively, showed highly significant corrlationship between the level of leaf prunning. In the mean time, the 1000 grain weight, gram weight and hulled rice yield increased in oder at one time urea foliar application plot(B) and two times foliar application plot (A) as compared with the .yield of control plot (C), and the high significance were observed among those treatments. Hulling ratio also showed the same tendency among those treatments(C,B and A plots in order). 3 : The nitrogen and carbon contents of both panicles and leaves in the foliar application of urea were increased. C/N ratio showed a higher level only in the leaves at the urea spray plot. In the mean time, it was found a higher degree of correlationship between the hulled rice yield(0.937),the contents of nitrogen(0.952) and carbon(0.946), and C/N ratio, indicating that the higher the contents of nitrogen and carbon, and C/N ratio the higher the yield of hulled rice. Exp. III: Effect of foliar application of urea and its time during the stage of ear formation on yield of rice plant. 1 : The difference in average number of grains per ear was significant between the time of ear fertilization, showing a tendency of increase of grain number in accordance with earlier treatments although no significance was seen between methods of ear fertilization. Number of grain of 2.0% urea solution foliar application plot, 10% urea solution soil application plot, 2.0% urea solution soil application plot and the control are 65.9, 65.6, 64.4 and 63.9 grains, respectively, indicating the largest grain number in the 2.0% urea foliar application plot among the others. 2 : Maturing rates showed a significance between time of ear fertilization, showing a tendency of increase in the rate with the time lagging until 7 days before Baring. Those of A₁, A₃, A₂ and A_0 were 89.8%. 89,4% 87.8% and 87.5% respectively, showing the highest of rate in A₁ and A₃ in methods of ear fertilization and being highly significant between its treatment. 3 : 1000 grain weights were highly significant between time of application, showing a tendency of increase of weights with the time lagging until days before earings as that of maturing rates. High significance was recognized between methods of ear fertilization, showing the highest in A₂ 23.18 gr. 4 : Yields per 3.3㎡ were not significant between time of ear fertilization, whereas were highly significant between methods of ear fertilization. Those of A₁, A₃, A₂ and A_0 were 1.486 ㎏, 1.491 ㎏, 1.381 ㎏ and 1.328 ㎏, respectively, showing the highest in A₁ and A₃. 5 : Hulling ratios showed significant different between time of ear fertilization, showing the highest in T₂, whereas those of methods of ear fertilization were highly significant between its treatment, Those of A₁, A₃, A₂ and A_0 were 84.72%, 84.06%, 83.29%, and 82.56% respectively, showing the highest m A₂ and A₃ among others. 6 : Yields of hulled rice per 3.3 ㎡ showed significant different between time of ear fertilization, showing the highest in T₁, 1.192 ㎏. Whereas, those were highly significant between methods of ear fertilization. Those of A₁, A₃, A₂ and A_0 were 1.259 ㎏, 1.254 ㎏, 1.149 ㎏ and 1.095 ㎏, respectively, showing the highest in A₁ and A₂. 7 : Contents of nitrogen on rice plant increased in case of nitrogen application as ear fertilizer and showed that the case of urea foliar application was more effective than that of soil application, showing the increased nitrogen content of rice plant was accompanied by carbon content.

"Overeducation" in the Korean Labor Market: Evidence from Young Workers

조성진,이수형 한양대학교 경제연구소 2014 JOURNAL OF ECONOMIC RESEARCH Vol.19 No.1

This paper examines the prevalence of “overeducation” in Korea and its economic implications. By overeducated workers, we mean those whose educational attainment exceeds the level of education their jobs require. Analyzing a sample of young college-educated workers, we find that approximately a quarter of workers are overeducated and these overeducated workers are paid significantly less and have lower job satisfaction compared to their counterparts who are adequately educated. Furthermore, overeducated workers are less likely to be employed or to work for the same firm in a subsequent period, but more likely to experience faster wage growth than adequately educated workers.

해양통제 확보 수단으로서 해군기지 타격에 관한 연구

조성진,조재욱 대전대학교 안보군사연구원 2022 안보군사학연구 Vol.- No.22

신냉전으로 국제사회는 해양통제 확보를 위한 경쟁의 시대로 회귀하고 있다. 과학기술의 발전으로 적 해군기지에 정박한 함정과 시설을 정밀하게 공격하는 해군기지 타격은 그 중요성이 증가하고 있지만 이를 해양통제와 연계하여 이론적으로 고찰한 연구는 부족하였다. 이 논문은 다른 해양통제 확보 수단과 구분되는 해군기지 타격의 가치와 특성을 연구한다. 이를 위해 기존 해양통제 확보 이론을 고찰한 후 해군기지 타격의 발전 추세, 중요성이 증가하는 사유, 역사적 사례를 검토하여 가치와 특성을 도출하였다. 해군기지 타격은 강자와 약자가 모두 사용할 수 있는 전략이며 북한과 주변국의 잠재적 해양 위협을 모두 고려해야 하는 대한민국에게 전략적 선택지를 늘려주는 유용한 수단으로 활용할 수 있다.

대잠전 의사결정지원 시스템에서 표적 탐색 논리 연구

조성진,최봉완,전재효,Cho, Sung-Jin,Choi, Bong-Wan,Jeon, Jae-Hyo 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.5

It is not easy job to find a underwater target using sonar system in the ASW operations. Many researchers have tried to solve anti-submarine search problem aiming to maximize the probability of detection under limited searching conditions. The classical 'Search Theory' deals with search allocation problem and search path problem. In both problems, the main issue is to prioritize the searching cells in a searching area. The number of possible searching path that is combination of the consecutive searching cells increases rapidly by exponential function in the case that the number of searching cells or searchers increases. The more searching path we consider, the longer time we calculate. In this study, an effective algorithm that can maximize the probability of detection in shorter computation time is presented. We show the presented algorithm is quicker method than previous algorithms to solve search problem through the comparison of the CPU computation time.

2010년도 시가문학 분야 연구 동향

조성진 국문학회 2011 국문학연구 Vol.0 No.24

비정상 이동격자 기법을 이용한 5인치급 프로펠러의 공력성능 분석

조성진,이상욱 한국기계기술학회 2021 한국기계기술학회지 Vol.23 No.6

In this study, the analysis of the unsteady viscous flow field using the uRANS equation in a moving mesh was studied. The simulation domain is composed of an overset zone fixed to a propeller and rotating at a constant angular speed and a far zone which is located in the far distance and does not move. Each zone is composed of a polyhedral meshes for the accurate and robust gradient calculation in addition to the reduction of computation time. Simulation technique was applied to the aerodynamic analysis of the 5-inch propeller and compared with those of the MRF and the thrust test. The thrust predicted by the moving mesh showed good correlation with the MRF result within 0.5% difference, but the torque showed a tendency to under-prediction by about 10% compared to the MRF. In the future, we plan to further validate the numerical analysis technique using the moving mesh by applying it to the configurations in which precise test results exist.

화자의 ‘시선’과 사설시조의 담당층 문제 - 명대 악부민가와의 비교를 통해

조성진 국문학회 2012 국문학연구 Vol.0 No.26

The purpose of this paper is to get the integrated viewpoint that presume gisaeng(geisha) as the subject of writing and enjoying Saseol-sijo. For this, this study considers the social and economic context of prevalence of Saseol-sijo first, and how the adult entertainment space is described in Saseol-sijo. And Using Luce Irigaray's concept of 'gaze', this study analyzes the narrator's character in Saseol-sijo works which sing love and sexual love. From this, We know that ‘the female gaze’ is fundamentally opposite to ‘the male gaze’, so the former cannot be reduced to the latter. Through discussion like this, We also infer gisaeng(geisha)’s having played a role in the writing and enjoying Saseol-sijo works in which woman narrator sing a love and sexual love. To clarify this inference is reasonable, this paper compares Saseol-sijo and Yuefu-min’ge in Ming dynasty of China. 본고는 사설시조 창작·향유의 한 주체로서 기녀를 상정하는 통합적 시각을 마련하고자 하였다. 이를 위해 우선 17-8세기에 사설시조가 성행하게 된 사회경제적 맥락과 함께 유흥공간이 사설시조에 어떻게 나타났는가를 간단히 살펴보았다. 또한 뤼스 이리가라이의 ‘시선(gaze)’의 개념을 원용하여 남녀의 사랑과 성애를 노래한 작품들을 중심으로 그 화자의 성격을 살폈다. 이로부터 ‘여성의 시선’이 ‘남성의 시선’과 근본적으로 대립적일 수밖에 없으며, 따라서 여성화자의 목소리를 남성의 것으로 환원하기란 사실 거의 불가능함을 알았다. 이로써 여성화자가 나오는 사랑과 성애를 노래한 사설시조 작품의 상당수는 그 창작과 향유에서 기녀가 그 한 주체로서 일정한 역할을 하였음 것임을 추론하였다. 또한 이러한 추론을 좀 더 확고히 뒷받침하기 위해 이 같은 사설시조 작품과 중국 명대 악부민가를 비교·검토하였다. 이러한 고찰을 통해 사설시조에서 기녀 또는 그 언저리의 여성이 창작과 향유에 참여한 사설시조 작품의 존재 가능성을 충분히 확인하였다.

저강도 펄스형 초음파를 이용한 개의 슬개골 탈구 치료 효과

조성진,김남수,김화영,김선균,이성호,김병수 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10

The effect of low-intensity ultrasonography on dislocation of the patella and fracture healing is controversial, and current management of that does not generally involve the use of ultrasound therapy. Nine patients with dislocation of the patella were treated with low-intensity ultrasonography(l5 mW/㎠, 1∼3.3 MHz) per 10-15 min/days, with an interval of 3 days during the last 3 weeks, at Family Animal Hospital(in Kunsan city). Ultrasound therapy may be beneficial to dislocation of the patella and healing. This finding is of considerable importance in that treatment with a low-intensity pulsed ultrasound signal may reduce healing time and could yield substantial cost savings and decreases in disability associated with delayed healing of dislocation of the patella.

The Effectiveness of Parametric Approximation: A Case of Mainframe Computer Investment

조성진 한양대학교 경제연구소 2008 JOURNAL OF ECONOMIC RESEARCH Vol.13 No.1

The general method to solve the fixed point problem is a discretization of observed state variables. When the observed state variable is continuous, the required fixed point is in fact an infinite dimensional object. Therefore, in order to solve the fixed point problem, it is necessary to discretize the state space so that the state variable takes on only finitely many values. But there are limits regarding this method: (i) "curse of dimensionality"; (ii) the limits it places on our ability to solve high-dimensional DP problems. Despite these limits, this method have been used in many literature. However, The discretization method may not be applicable to computer replacement research to solve the fixed point problem, because of the aforementioned problems. Using a detailed data set on computer holdings by one of the world's largest telecommunication companies, this paper shows the effectiveness of Parametric Approximation procedure by comparison with the discretization method, which converts the contraction fixed-point problem into a nonlinear least squares problem with combining maximum likelihood estimation method to estimate the unknown parameters.

Industrial Trade Creation Effect Analysis after Korea-U.S. FTA : Including an Analysis on the Change of the Social Welfare in the Rice Market

조성진,유정근 한양대학교 경제연구소 2007 JOURNAL OF ECONOMIC RESEARCH Vol.12 No.1

This paper shows the economic effects after Korea-U.S. FTA through Panel Model and Simultaneous Equation Model. First of all, the panel analysis results of industrial trade creation effects due to the tariff elimination after Korea-U.S. FTA are as below. It can be expected for Korea to increase the amount of exports ; 108.1 million dollars in the field of transport industries (automobiles/parts and other transportation instruments) and 1.14 million dollars in the field of telecommunication industries. For the U.S., it can be expected to increase the amount of exports ; 25.16 million dollars in the field of precision industries, 4.42 million dollars in the field of telecommunication industries, and 0.27 million dollars in the field of computer industries. In addition, the social welfare effects in the rice market of Korea are as below, i.e. supposing that the only rice market is opened and the quality of rice harvested in Korea and the U.S. is the same. In case that the Calrose rice can be distributed fully in Korea market and the rice price in the U.S. is applied in Korea, total social welfare is estimated to increase about 1,981.6 billion wons. If the social welfare effect is divided into consumer's surplus and producer's surplus, it can be expected for consumers in Korea to be benefitted about 8,675.9 billion wons. However, it can be expected welfare loss about 6,694.2 billion wons for workers in the rice industries of Korea. This paper shows the economic effects after Korea-U.S. FTA through Panel Model and Simultaneous Equation Model. First of all, the panel analysis results of industrial trade creation effects due to the tariff elimination after Korea-U.S. FTA are as below. It can be expected for Korea to increase the amount of exports ; 108.1 million dollars in the field of transport industries (automobiles/ parts and other transportation instruments) and 1.14 million dollars in the field of telecommunication industries. For the U.S., it can be expected to increase the amount of exports ; 25.16 million dollars in the field of precision industries, 4.42 million dollars in the field of telecommunication industries, and 0.27 million dollars in the field of computer industries. In addition, the social welfare effects in the rice market of Korea are as below, i.e. supposing that the only rice market is opened and the quality of rice harvested in Korea and the U.S. is the same. In case that Calrose rice can be distributed fully in Korea market and the rice price in the U.S. is applied in Korea, total social welfare is estimated to increase about 1,981.6 billion wons. If the social welfare effect is divided into consumer’s surplus and producer’s surplus, it can be expected for consumers in Korea to be benefitted about 8,675.9 billion wons. However, it can be expected welfare loss about 6,694.2 billion wons for workers in the rice industries of Korea.