• Korean Journal of Weed Science
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• v.16 no.1
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• pp.8-13
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• 1996

This study was conducted to know the effect of storage period, harvesting time and light condition on dormancy breaking of major weeds. Echinochloa crus-galli, Cyperus serotinus, Aeschynomene indica, Ludwigia prostrata and Bidens tripartita had the 10 or 30% germination ability within 30 days after harvest but scirpus juncoides, Potamogeton distinctus, Aneilema japonica and Monochoria vaginalis had not germination untill 120 days after harvest of seed. C. serotinus and P. hydropiper required strong light for germination but S. juncoides, L. prostrata and B. tripartita showed the less tham 5% germination in the dark condition gerntinator. S. juncoides germination showed negative response in chemical soaking but A. japonica, B. tripartita and L. prostrata showed high germination percentage in Acetone, Chloroform and distilled water soaking during the 10 days after treatment.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1194-1199
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• 2007

본 연구에서는 도시배수관망의 간략화 모의 시 지선을 단순 생략하는 것이 아니라 2차원 관망을 1차원으로 전환시키는 방법인 등가하천 개념을 도입하여 도시유역의 유출량 산정에 있어서 여러 지선들을 개별적으로 모의하지 않으면서도 실제 존재하는 지선들의 효과를 고려할 수 있는 방법을 개발하고자 하였다. 자연하천에 대해 개발된 등가하천 개념은 최근의 수문모형의 경향인 물리적 분포형 모형의 복잡성을 피하면서 전통적인 개념적 집중형 모형이 가지는 간편성을 살리고 그 것이 가지고 있는 선형가정의 한계를 극복하기 위한 방안으로서 제안된 방법이다. 등가하천 개념을 도입하여 개발된 모형은 종국적으로 강우-유출관계에 있어서 강우의 크기, 선형 및 비선형성, 유역면적 등이 미치는 영향을 분석하기위한 도구로 개발되었으며, 본 연구에서는 출구로부터 동일 거리 s에 위치한 지점에서의 배수관망의 공간적인 분포 및 집중패턴을 파악하는 폭함수(width function, n(s))와 면적함수(area function, M(s))를 이용하여 관망을 간략화 하였다. 등가관의 수리기하조건 결정은 유역이 정상상태에 도달했을 경우에 대해서 이루어지게 되며 정상상태 모의를 통해 개별 관망단면들에 대해 얻어진 유량(Q), 면적(A), 수심(y) 자료간의 상관관계를 유추하여 Q(A), A(y) 함수를 유도하게 되면 종국적으로 관로홍수추적에 이용되는 지배방정식의 매개변수인 파속계수(c) 및 확산계수(D)를 계산할 수 있게 된다. 본 연구에서는 대상 유역으로 군자 배수구역을 선정하여 유역의 특성과 관망 자료를 수집하고 간략화 기법을 적용한 결과를 분석 하였다.다. 21세기 문화산업에서 우리가 판단하게 될 디자인의 가치는 계몽의 원리에 대한 '역사성'과 '현재성'의 변증법에 달려있는 것이며, 새로운 철학, 새로운 문명, 새로운 세계를 열어가는 것이다.r$ (地理志)에는 추현리와 이미 외리를 언급하면서 상주의 자기제작의 위상을 짐작하는 기록이 언급되면서 전국의 상품의 절반을 담당하고 있었음을 알 수 있었다. $\ulcorner$경상도지리지$\lrcorner$(慶尙道地理志)에는 상주가 8곳으로 1/3의 자기 생산을 담당하고 있었다. $\ulcorner$경상도지리지$\lrcorner$(慶尙道地理志)에는 $\ulcorner$세종실록$\lrcorner$(世宗實錄) $\ulcorner$지리지$\lrcorner$(地理志)와 동년대에 동일한 목적으로 찬술되었음을 알 수 있다. $\ulcorner$경상도실록지리지$\lrcorner$(慶尙道實錄地理志)에는 $\ulcorner$세종실록$\lrcorner$(世宗實錄) $\ulcorner$지리지$\lrcorner$(地理志)와의 비교를 해보면 상 중 하품의 통합 9개소가 삭제되어 있고, $\ulcorner$동국여지승람$\lrcorner$(東國與地勝覽) 에서는 자기소와 도기소의 위치가 완전히 삭제되어 있다. 이러한 현상은 첫째, 15세기

• The Journal of Engineering Geology
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• v.17 no.3
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• pp.359-365
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• 2007

Freezing and thawing cycle is one of the major weathering-induced factors in the mechanical weathering of the rock mass. This natural process accelerates rock weathering process by breaking down the parent rock materials and makes soil or weathered rock formation in a rock slope surface zone. It can also cause reduction of the shear strength in slopes. It is important to calculate the deterioration depth caused by freezing-thawing for a slope stability analysis. In this study, deterioration depths of rock slope due to freezing-thawing were calculated using the 1-D heat conductivity equation. The temperature distribution analysis was also carried out using collected temperature distribution data for last five years of several major cities in Korea. The analysis was performed based on the distributed rock types in study areas. Thermal conductivities, specific heats and densities of the calculation rocks are tested in the laboratory. They are thermal properties of rocks as input parameters for calculating deterioration depths. Finally, the paper is showing the calculated deterioration depths of each rock type slopes in several major cities of Korea.

• Journal of Korean Society for Geospatial Information Science
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• v.1 no.1 s.1
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• pp.141-152
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• 1993

This study aims to generate digital elevation model from digital satellite imagery. Digital elevation model is being increasingly used for geo-spatial information system database development and for digital map production. Image matching technique was applied to acquire conjugate image coordinates and the algorithm for digital elevation model generation is presented in this study The exterior orientation parameters of the satellite imagery is determined by bundle adjustment and standard correlation was applied for image matching conjugate of image points. The window as well as the searching area have to be defined in image matching. Different sizes of searching area were tested to study the appropriate size of the searching area. Various coordinate transformation methods were applied to improve the computation speed as well as the geometric accuracy. The results were then statistically analysed after which the searching area is determined with the safety factor. To evaluate the accuracy of digital elevation model, 3-D coordinates were extracted from 1/5000 scale topographic map and this was compared to the digital elevation model generated from satellite imagery. The algorithm for generation of digital elevation model generated from satellite imagery is presented in this study which will prove effective in the database development of geo-spatial information system and in digital elevation modelling of large areas.

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.2
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• pp.43-47
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• 2000

The purpose of this study is evaluate for effect quality eye care to the aged population of rural community. This study investigated one of important factors in dispensing distance pupillary distance. measured reading pupillary distance, calculated reading pupillary distance into age group and sex. I measured pupillary distance and near inter pupillary distance with corneal reflection pupillometer(shin Nippon PD-82) The objects are male and female living rural community at least 60 years old. The mean pupillary distance for distance of male and female were 63.52 mm, 61.24 mm, respectively. The mean measured reading pupillary distance of male and female were 60.12 mm, 58.08 mm, respectively. Gradient and difference between male and female were same with mean pupillary distance for distance. The result of comparison the mean difference of the mean measured reading pupillary distance and the calculated reading pupillary distance into the age group and sex. This result of changes of addition, as the age is older, the mean addition is greater than youth. I'd like to compare changes of these factors influenced by environmental factors, however I couldn't see about these. So I couldn't considered their relationship and some possible problems of wearing commercial reading glass.

• Journal of the Korean Data and Information Science Society
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• v.28 no.2
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• pp.261-270
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• 2017

This research aims to investigate how healthcare professionals can control their behaviors in the internet and the status of their Internet addiction, thus emphasizing appropriate internet ethics awareness of students majoring in healthcare-related field, the future healthcare professionals. The goal of this research is to verify the mediating effect of self-control between the status of internet addiction of healthcare-related college students and their internet ethical awareness. A questionnaire survey was conducted on 236 students majoring in healthcare-related fields in 5 universities located in D city from March to April, 2016. The result of analyzing correlation of Internet addiction, internet ethics awareness, and self-control shows that self-control is negatively correlated with internet addiction but positively correlated with internet ethics awareness. The result of research suggests that self-control does have partial mediation effect on internet addiction and internet ethical awareness. Accordingly, it is necessary to develop mediator program that enhances self-control in order to improve internet ethical awareness of healthcare-related college students and develops measures to prevent addition to the internet, one of the primary cause of decline in internet ethics awareness.

• Korean Chemical Engineering Research
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• v.49 no.6
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• pp.775-780
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• 2011

5-cell DMFC stack was fabricated and operated with the load of 4 A for 4000 hrs. After 4000 hrs operation peak power density of the stack reduced by 27.3%. Two of the five cells did now show performance degradation, the performance of other two was reduced by 40% and the performance of the other decreased by 60%. The amount of performance degradation of each cell by long-term operation did not correlate with the position in the stack. Platinum particle size in the anode catalyst layer of the MEA with the strongest degradation increased and the increase was severer on the position of methanol inlet than on the position of methanol outlet. However, platinum particle size in the cathode catalyst layers did not changed for all the MEA'. Ruthenium crossover from the anode catalyst layer to the cathode catalyst layer through the membrane was observed after 4,000 hrs operation by SEM-EDX and it occurred for all MEA' regardless of the degree of performance degradation. Atomic ratio of ruthenium to platinum in the cathode catalyst layer was the highest in the MEA with the strongest performance degradation.

• Journal of Life Science
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• v.17 no.6 s.86
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• pp.783-790
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• 2007

G protein coupled receptors (GPCRs) transmit various extracellular signals into the cells. Upon binding of the ligands, conformational changes in the extracellular and/or transmembrane (TM) domains of CPCRs were propagated into the cytoplasmic (CP) domain of the molecule leading to the activation of their cognate heterotrimeric C proteins and kinases. Constitutively active GPCR mutants causing the activation of C Protein signaling even in the absence of ligand binding are of interest for the study of activation mechanism of GPCRs. Two classes of constitutively active mutations, categorized by their effects on the salt bridge between Ell3 and K296, were found in the TM domain of rhodopsin. Opsin mutants containing combinations of the mutations were constructed to study the conformational changes required for the activation of rhodopsin. Rhodopsin chromophore regenerated with 11-cis-retinal showed a thermal stability inversely correlated with its constitutive activity. In contrast, rhodopsin mutants exhibited a binding affinity to an agonist, all-trans-retinal, in a constitutive activity-dependent manner. In order to test whether the conformational changes responsible for the activation of trans-ducin (Gt) are the same as the conformation required for the recognition of rhodopsin kinase, analysis of the mutants were carried out with phosphorylation by rhodopsin kinase. Rhodopsin mutants containing combinations of different classes of the mutations showed a strong synergistic effect on the phosphorylation of the mutants in the dark as similar to that of Gt activation. The results suggest that at least two or three kinds of segmental and independent conformational changes are required for the activation of rhodopsin and the conformational changes responsible for activating rhodopsin kinase and Gt are similar to each other.

• Journal of the Korean Home Economics Association
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• v.17 no.2
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• pp.83-105
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• 1979

The purpose of this study is 1) to find out several factors which related to father's rearing attitude and father's concern influencing on children's personality development and 2) to examine closely the correlation between father and children's personality. For the study, cases of 914 children from Seoul and Chong-Ju were sampled to put their personality on test and to investigate on the father's attitude for child rearing and child -concern. The instruments used in this research are question aires, which the investigators made, to examine the father's attitude for child-rearing and child-concern, and the child-personality test performed by Ph. D.B.M.J eong. The results obtained can be summarized as follows : 1. Most fathers were found to be more affectionate to daughters then to sons in their attitude for child-rearing and child-concern , and fathers in Chong-Ju had the tendency to have morn concern about the first child. 2. The more educated fathers, public official or company employee, and Christian or Catholic , showed much more concern about their children, which was shown or Catholic ,showed much more concern about their children , which was shown in this study as statistically significant (P<.0.1, F-test). 3. There were no sex differences in correlations between father's child-rearing attitude or child-concern and child-personality. 4. Father's child-rearing attitude was highly related to child's birth order, That is : the first child showed the low coefficient in general activity and impulsiveness, and showed the high coefficient in emotional stability of personality traits when father's child-rearing attitude was high. 5. Regardless of sex, birth order, economic level, children showed high coefficient in dominance, reflectiveness, and sociability of personality traits when father's child-concern was high. 6. Children in Chong-Ju also presented high marks at percentile in emotional stability when they liked grand fathers and fathers. 7. Children who identify their fathers showed the high marks in emotional stability, specially cases of Chong-Ju were statistically more significant (P<0.5, F-test). 8. There were much difference in percentile marks of personality traits among children in Seoul and Chong -Ju ; the marks which children in Chong-ju made were average 13.71 score lower than those of Seoul in general -activity , dominace, impulsiveness reflectiveness, sociability only except emotional stability.

• The Korean Journal of Mycology
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• v.23 no.4 s.75
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• pp.285-297
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• 1995

Ganoderan, an immunomodulating ${\beta}-glucan$ of G. lucidum, induces potent antitumor immunity in tumor-bearing mice. The present study was set up to elucidate the chemical composition and bioactivities of ganoderan obtained from the mycelial fractionation of G. lucidum IY009. Ganoderan was isolated and purified from its extracellular, cell wall and cytoplasmic sources. These ganoderans were composed mainly of glucose. The cell wall-alkali soluble-water soluble fraction (CW-AS-WS) showed the highest antitumor activity (inhibition rate of 94%) in sarcoma-bearing mice and 37% of anticomplementary activity. The CW-AS-WS fraction was found to be approximately average 20,000 dalton in aq. 0.3N NaOH solution and composed of 88% carbohydrate and 4% protein. The carbohydrate of the CW-AS-WS was composed of 74% glucose. These results indicate that the ganoderans extracted from the mycelial fractionations of G. lucidum IY009 had different chemical characteristics and showed different potentiality in antitumor and anticomplementary activity.