• Journal of Korean Society of Environmental Engineers
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• v.32 no.9
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• pp.840-850
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• 2010

The present study was attempted to find the effects of structural properties of phosphorus on the water quality of Gyehwa reservoir in Saemangeum. Relationship of phosphorus fractions between water and sediment properties was closely examined, and a few types of phosphorus were found from the sample sediment as : Saloid-P, Al-P, Fe-P, Ca-P, Red-P and Occd-P. Saloid-P (1.4%), Al-P (0.5%), Fe-P (39.8%), Ca-P (56.6%), Red-P (0.4%), Occd-P (1.3%) were extracted in a mass basis from the sediment of Gyehwa reservoir. Approximately more than 97% of phosphorus were calcium related phosphorus (Ca-P, 56%) and iron bound phosphorus (Fe-P, 39.8%). The Fe-P closely relates with water quality of T-N (r=0.761, p<0.05), $NO_3$-N (r=0.754, p<0.05), $NH_4$-N (r=0.728, p<0.05), T-P (r=0.774, p<0.05) and $PO_4$-P (r=0.767, p<0.05) while the Ca-P did not show any consistent dependency on the water quality. On the other hand, the correlation of Ca-P with $P_2O_5$ was high with r=0.783 (p<0.05) in the sediment. The Fe-P was affected significantly on the Ignition Loss (r=0.569, p<0.05), T-N (r=0.715, p<0.05) and T-P (r=0.983, p<0.01). In the research of correlation between phosphorus fraction and heavy metals in the sediment, Ca-P did not show any specific relationships with heavy metals. The Fe-P showed a significant correlation with As (r=0.817, p<0.01), Cu (r=0.793, p<0.05), Cd (r=0.786, p<0.05), Zn (r=0.738, p<0.05), so that it can be stated that the presence of Fe-P may implicate the volume of various metallic elements.

• Korean Journal of Ichthyology
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• v.2 no.1
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• pp.77-87
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• 1990

The development of eggs and larvae, and minute tubercles on the skin surface of the larvae in Acheilognathus lanceolatus (=Acheilognathus intermedia intermedia) from Korea were observed. The ripe eggs of A. lanceolatus from Korea were nearly spindly. The shape was distinguishable from that of Japan. And then the embryonic development of this specimen from Korea was faster than that from Japan. As regards larval development and morphology and distribution of the minute tubercles, however, A. lanceolatus in both Korea and Japan were same except for the mentioned above two characters. These findings suggested that the two formes should be separated at subspecies level.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.663-664
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• 2015

본 논문에서는 전기자동차의 인버터-전동기 연결 구성에 따른 전도성 잡음 특성에 대해 분석 하였다. 인버터와 전동기를 연결하는 케이블은 임피던스를 가지고 있으며, 케이블 길이별 특성 시뮬레이션에서 주파수에 따른 임피던스가 다르게 나타나는 것을 알 수 있다. 이러한 특성을 고려하기 위해, 인버터와 전동기를 연결하는 케이블 길이에 차이를 두어 시뮬레이션을 진행 하였으며, 인버터 전동기가 일체화되어 케이블 없이 부스바(Busbar)로 연결된 형태에 대해서도 시뮬레이션을 진행 하였다. 시뮬레이션 결과에서 Busbar 형태 및 케이블 길이에 따른 전도성 잡음의 변화는 거의 없는 것을 확인 할 수 있었다.

• Journal of the Korean Wood Science and Technology
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• v.17 no.4
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• pp.1-25
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• 1989

가죽나무 (Alianthus altissima Swingle) 수간(樹幹)의 지항고(地上高) 180cm 부위(部位)에 19mm 너비의 플라스틱 밴드를 결체(結締)하여 1년간(年間) 방치(放置)한 후 이 밴드를 결체(結締)하여 주므로써 수가(樹幹)을 둘러싸는 원반형태(圓盤形態)의 과대(過大)한 비대생장(肥大生長) 조직(組織)인 종양상조직(腫瘍狀組織)(tumorous tissue)이 형성(形成)되고 이러한 종양상(腫瘍狀) 조직(組織)의 원반(圓盤)과 상하(上下)에 위치(位置)한 정상형태(正常形態)의 원반(圓盤)을 채취(採取)하여 해부학적(解剖學的) 차이(差異)를 조직학적(組織學的) 특성(特性)면에서 조사(調査) 비교(比較)하였다. 종양상(腫瘍狀) 부위(部位)에서는 이상적(異常的)으로 넓은 연륜폭(年輪幅)을 지니는 중양재(腫瘍材)(tumor wood)가 밴드 해체(解締) 다음 해인 제(第)3연륜(年輪)에서 형성(形成)되었으며 밴드 결체기간(結締期間)중에 생장(生長)한 제(第)2연륜내(年輪內)에서는 내부(內部)로 발달(發達)된 변색재(變色材)(discolored wood)와 외부(外部)로 발달(發達)한 정상재색(正常材色)을 구분하는 방어대(防禦帶)(barrier zone)가 형성(形成)되어 있었으며 이 종양상(腫瘍狀) 부위(部位)의 상하(上下)에 위치(位置)한 정상형태(正常形態)의 부위(部位)에서는 정상재색(正常材色)을 나타내는 제(第)2연륜내(年輪內)에 방어대(防禦帶)에 해당하는 위연륜상대(僞年輪狀帶)(false ring-like zones)가 형성(形成)되어 있었는데 이러한 방어대(防禦帶)와 위연륜상대(僞年輪狀帶)는 비정상적(非正常的)으로 과다한 이상형태(異常形態)의 유세포(柔細胞)와 상해(傷害)검구(溝) 및 검강(腔)으로 구성되어 있는 특징(特徵)을 나타내고 있다. 종양상(腫瘍狀) 부위(部位)에 있어서 종양재((腫瘍材)인 제(第)3연륜(年輪)과 방어대(防禦帶)후에 발달(發達)한 제(第)2연륜부분(年輪部分)은 불규칙(不規則)한 연륜계(年輪界), 매우 불규칙적(不規則的)인 구조(構造)를 지니는 이상조직(異常組織), 비정상적(非正常的)인 형태(形態)를 나타내는 목섬유(木纖維) 및 도관요소(導管要素), 비정상적(非正常的)인 형태(形態)를 지니는 방사조직(放射組織)을 가지며 추재부(秋材部)에 고립관공(孤立管孔) 및 복합관공(複台管孔)이 발달(發達)하며 스트랜드유세포(柔細胞)와 방사유세포(放射柔細胞)에 결정(結晶)이 존재(存在)한다는 면에서 서로 유사(類似)하였다. 그리고 제(第)3연륜(年輪)인 종양재(腫瘍材)의 춘재부(春材部) 관공(管孔)의 수(數)는 정상재(正常材)보다 작은 것으로 나타났다.

• 월간낙농육우
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• v.20 no.2 s.214
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• pp.73-82
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• 2000

낙농경영에 적합한 미래의 나라는 두가지 형태로 구분(양극화)된다고 예측할 수 있다. 그 하나의 형태는 관대한 초지에서 조방적(粗放的)으로 값싼 우유를 생산할 수 있는 국가들이고 다른 하나의 형태는 집약적(集約的)인 형태로 대형화된 낙농경영으로 첨단 기술을 구사하여 값싼 우유를 생산할 수 있는 국가들인 것이다. 따라서 이스라엘이나 한국의 낙농도 국제 경쟁력 있는 우유생산을 실현 하려면 집약적 대형화 경영이 불가피하다고 생각된다. 즉 '집약적 대형화와 첨단

• Korean Journal of Environment and Ecology
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• v.33 no.2
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• pp.228-236
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• 2019

This study investigated the effect of the sediment phosphorus fraction sampled from the southern coast of Korea on the release characteristics of sediments by environmental changes of water quality. We conducted the release experiment in the laboratory for 20 days and measured the phosphorus fraction properties, the environmental factors of water quality, and the release rate of total phosphorus. The results showed a decrease in dissolved oxygen by the growth of microorganisms in the water layer, leading to the anaerobic condition in which the redox potential of the sediments decreased. As such, the decreasing variability of phosphates bonded to iron oxide in the sediment phosphorus was higher after 20 days of the release experiment than the first day. It means that the metal ions and the separated inorganic phosphorus transfer into the water when the iron oxide is reduced. The separated inorganic phosphorus is easily absorbed by the plankton. The analysis of total phosphorus in the water layer showed that it continuously increased to up to 0.304 mg/L for 20 days, and the release rate had a high correlation with the decrease of dissolved oxygen after 5 days of culture. Therefore, it is necessary to pay attention to the characteristics of iron bonded to phosphorus in the phosphorus fraction and dissolved oxygen to manage the eutrophication of the system.

• Journal of the Mineralogical Society of Korea
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• v.16 no.2
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• pp.151-159
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• 2003

$^{31}$ /P NMR and XRD have been used to study the mineralogical compositions and the phosphorus species in marine sediments near Wolsung nuclear power plant. The core samples with 30cm depth were investigated and no mineralogical changes have been found. The studied marine sediments were composed of quartz, albite, microcline, calcite, and some clay minerals such as illite, smectite, chlorite, and kaolinite. Only orthophosphate-monoester and very small amount of ortho-phosphate-diester were identified as phosphorus species in the studied sample, different from the species reported in other countries. These phosphorus species are mainly from organisms and was exposed to the oxic conditions. The consistent mineralogical compositions as well as the same phosphorus species throughout the entire core samples indicate that the constant oxic condition was kept without any changes in sedimentary conditions or the sediments were deposited with different sedimentary conditions, but later they were disturbed by other activities and exposed to the surface oxic conditions continuously.

• Journal of Sasang Constitutional Medicine
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• v.10 no.1
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• pp.161-170
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• 1998

1. Purpose : This research is a study about constitutional diagnosis through the external appearances. especialy it is for finding shape differences of the upper-face pictures of moire, according to the Sasang constitution. 2. Method : We have collected 113 cases of patients of the Sasang Constitutional Department, including employees of the Kyung-Hee Medical Center and took pictures of moire of upper face and measured 50 points. We analyzed shape differences of the upper face according to the Sasang constitution. 3. Results : Analysing the moire of upper face, tile characteristics according to sasang constitution presented. 4. Conclusion : Soyangin had a projected part of left upper face compared with taeumin and soeumin, and taeumin had a projected part of right upper face. With the image of moire, the characteristics of upper face according to sasang constitution was found.

• Journal of Sasang Constitutional Medicine
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• v.10 no.2
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• pp.271-281
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• 1998

1. Objective : This research is a study about constitutional diagnosis through the external appearances, especialy it is for finding shape differences of the upper-face pictures of moire, according to the Sasang constitution 2. Method : We have collected 98 cases of femail patients of the Sasang Constitutional Department, including employees of the Kyung-Hee Medical Center and took pictures of moire of upper face and measured 50 points. We analyzed shape differences of the upper face according to the Sasang constitution. 3. Results : Analysing the moire of upper face, the characteristics according to sasang constitution presented. 4. Conclusion : Soyangin had a projected part of left upper face compared with taeumin. With the image of moire, the characteristics of upper face according to sasang constitution was found.

• The Journal of Korean Academy of Prosthodontics
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• v.37 no.5
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• pp.581-596
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• 1999

The purpose of this study was to investigate the stress distribution of the abutment and sup-porting tissues according to the slopes and types of the guiding plane of distal extension removable partial dentures. The 3-dimensional finite element method was used and the finite element models were prepared as follows. Model I : Kratochvil type guiding plane with $90^{\circ}$ to residual ridge Model II : Kratochvil type guiding plane with $95^{\circ}$ to residual ridge Model III : Kratochvil type guiding plane with $100^{\circ}$ to residual ridge Model IV : Krol type guiding plane with $90^{\circ}$ to residual ridge Distal extension partial denture which right mandibular first and second molar were lost was used and the second premolar was prepared as primary abutment with RPI type retainer. Then 150N of compressive force was applied to central fossae of the first and second molars and von Mises stress and displacement were measured. The results were as follows 1. Model I and Model IV showed a similar stress distribution pattern and the stress was concentrated on the apex of the root of the abutment. 2. The stress was increased and concentrated on mesial side of the root of the abutment in Model II. The stress was concentrated on buccal and mesiobuccal side of the root of the abutment in Model IV. 3. In Model I, the root of the abutment displaced and twisted a little in clockwise. In Model IV, the root of the abutment displaced to distolingually at apical region of the root and mesiobuccally at cervical region of the root. 4. In Model II, the root of the abutment displaced to mesiolingually at apical region of the root and more displaced and twisted in counterclockwise at cervical region of the root. In Model III, the root of the abutment displaced to mesiobucally at apical region of the root and more displaced and twisted in clockwise at cervical region of the root.