• 한국지하수토양환경학회지:지하수토양환경
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• 제16권2호
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• pp.41-51
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• 2011

This study was conducted to investigate the relationship between groundwater level change and a large earthquake using the data of groundwater and seawater intrusion monitoring wells in Jeju Island. Groundwater level data from 13 observation wells were analyzed with a large earthquake. The Earthquake occurred at Sumatra, Indonesia (Mw = 7.7) on 13 June 2010, and groundwater level anomalies which seems to be related to the Earthquake were found in 6 monitoring wells. They lasted for approximately 16~27 minutes and the range of groundwater level fluctuations were about 1.4~2.4 cm. Coefficient of determination values for relationship between groundwater level change and transmissivity, and response time were calculated to be $R^2$ = 0.76 and $R^2$ = 0.96, respectively. The study also indicates that the high transmissivity of aquifer showed the high goundwater level changes and longer response time.

• Restorative Dentistry and Endodontics
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• 제23권2호
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• pp.607-617
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• 1998

The purpose of this study was to evaluate the apical sealing ability of lateral condensation method, vertical condensation method, and MicroSeal obturation system. Sixty-four extracted anterior teeth were instrumented to #40 using Profile. Three groups of 20 teeth were obturated by lateral condensation technique, vertical condensation technique, and and MicroSeal obturation system. Control group were not obturated. Teeth were immersed in resorcinol-formaldehyde resin for 5 days at $4^{\circ}C$, and the resin was allowed to polymerize completely for 4 days at room temperature. Teeth were ground horizontally at 1,5mm(level 1), 2.5mm(level 2), and 3.5mm(level 3) from the anatomic apex and examined with a stereomicroscope at X40 magnification. The photographs were taken a at X40 magnification of the filling in each level and scanned. The leakage area, which was filled with the resin, was measured at each of the three levels. Each ratio of leakage was evaluated by calculating the ratio of thearea of the resin to the total area of the canal and was analyzed statistically. The results were as followed: 1. Vertical condensation group had significantly higher percentage of the area which was obturated by gutta percha than other two technique at each level. 2. At the level 1, there was the greatest leakage in the lateral condensation group, but there was no statistically significant(P>0.05) 3. At the level 2, there was the least leakage in the MicroSeal group, and the most leakage in the lateral condensation group. There was statistically significant difference between the MicroSeal group and the lateral condensation group(P<0.05). 4. At the level 3, there was least leakage in the vertical condensation group, and the most leakage in the lateral condensation group. There was statistically significant difference between the vertical condensation group and the lateral condensation group(P<0.05).

• 기본간호학회지
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• 제3권2호
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• pp.201-211
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• 1996

The purpose of this study was to compare the comfort level between healthy people and adult in-patients in Korea. The sample consisted of 248 adults(healthy adults : 124, patients admitted in university hospitals in Seoul and Jinju : 124). The research tool used for the study was General Comfort Questionnaire(GCQ) which was developed by Kolcaba(1992) and was translated by Korean. The research tool consisted of 28 items(6 items on physical dimension, 9 items on psychospritual dimension, 7 items on environmental dimension, 6 items on social dimension). Data were analyzing using the SPSS, yielding t-test, ANOVA. The results are as follows : 1) Mean scores for comfort level in healthy adults were 2.92 on a 4 point scale. 2) Mean scores for comfort level in-patient adult were 2.72 on a 4 point scale. 3) There was a significant difference between the two groups on the comfort level. The healthy adults had higher comfort level than in-patients(t=4.44, p=0.000). 4) There was a significant difference between the two groups on the comfort level of physical and environmental dimension. The healthy adults had higher comfort level than in-patients(t=2.99, p=0.003) and environmental dimension(t=8.81, p=0.000).

• Asian-Australasian Journal of Animal Sciences
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• 제13권11호
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• pp.1536-1541
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• 2000

The present study was carried out to measure changes of feed intake and thirst level caused by water deprivation in goats fed on dry feed and to elucidate the relationship between those two parameters. Water deprivation significantly (p<0.01) decreased cumulative feed intake and rate of eating at 30, 60, 90 and 120 min, respectively, after feed presentation. Cumulative feed intake, after completion of 2 h feeding, was reduced by about 20, 21 and 64 % due to water deprivation during feeding for 2 h (WD2), for 22 h (WD22) and for 46 h (WD46), respectively, compared to free access to water (FAW). Compared to the FAW, WD2, WD22 and WD46 increased thirst level by about 5, 5 and 9 times, respectively. Mean thirst level (X, g/30 min) was negatively correlated with cumulative feed intake (Y, g DM) after completion of 2h feeding (Y=1302-0.2 X, $r^2=0.97$, p<0.05). Water deprivation depressed plasma volume and there was a significant positive regression between plasma volume (X, ml) and cumulative feed intake (Y, g DM) after completion of 2h feeding (Y=-1003+0.6 X, $r^2=0.99$, p<0.01). Mean plasma osmolality (X, mOsmol/l) correlated significantly and negatively with cumulative feed intake (Y, g DM) after completion of 2h feeding (Y=27004-84.9 X, $r^2=0.95$, p<0.05). In conclusion, a decrease of feed intake during water deprivation is mainly due to an increase of thirst level quantitatively, and the act of feeding itself induces thirst more than the length of water-deprivation periods in goats fed on dry feeds. The present findings suggest that plasma osmolality and plasma volume which affect thirst level are involved in the decrease of feed intake in water-deprived goats.

• 전자공학회논문지
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• 제53권9호
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• pp.12-17
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• 2016

홀로그래픽 데이터 저장 장치(HDSS)는 페이지 단위로 저장 매체의 체적에 데이터를 저장 및 판독하고 2차원으로 데이터를 처리하기 때문에 데이터 전송 속도 및 저장 용량이 증가한다. 게다가, 멀티레벨 HDSS는 한 픽셀에 한 비트이상을 저장할 수 있다. 하지만 2차원으로 페이지를 처리하므로 기존의 데이터 저장 시스템과 달리 2차원으로 인접한 심볼 간 간섭(ISI) 및 인접 페이지 간 간섭(IPI)가 발생한다. 기존에 발표된 논문들은 멀티레벨 HDSS 환경에서 2차원 ISI 완화에 관한 연구에 초점을 두었지만 멀티레벨 HDSS 환경에서 2차원 ISI와 IPI를 동시에 완화하는 연구는 진행되지 않았다. 본 논문에서는 2차원 ISI 및 IPI를 동시에 완화하는 4-레벨 균형 변조부호를 제안하였다.

• 터널과지하공간
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• 제5권2호
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• pp.89-94
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• 1995

Regression analysis and a comparative study were carried out for 52 blast vibration data which were monitored by changing the monitoring distance and charge per delay. The results are as follows: 1) The square and cube root scalings and general equation which have a confidence level at the point of 90% and 99% are V90=33300(SD)-2.026 , V90=23600(SD)-1.993, V90=26300W0.755 R-2.007 and V99=48400(SD)-2.026, V99=34000(SD)-1.993 , V99=38100W0.755R-2.007, respectively. 2) There is need to decide the allowable max. charge weight per delay considering the cross points comparatively of the nomogram constructed using several predictived equations. 3) It is necessary to derive the predictive equation on the basis of blast vibration level monitored in field and to decide safe vibration level and the confidence level.

• Journal of applied mathematics & informatics
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• 제23권1_2호
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• pp.517-523
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• 2007

Let R/I be an Artinian algebra of codimension 3 with Hilbert function H such that $h_{d-1}>h_d=h_{d+1}$. Ahn and Shin showed that A cannot be level if ${\beta}_{1,d+2}(Gin(I))={\beta}_{2,d+2}(Gin(I))$ where Gin(I) is a generic initial ideal of I. We prove that some certain graded Artinian algebra R/I cannot be level if either ${\beta}_{1,d}(I^{lex})={\beta}_{2,d}(I^{lex})+1\;or\;{\beta}_{1,d+1}(I^{lex})={\beta}_{2,d+1}(I^{lex})\;where\;I^{lex}$ is a lex-segment ideal associated to I.

• 한국환경보건학회지
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• 제10권2호
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• pp.69-77
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• 1984

Air pollution has been one of the severe problems in city area. Sulfur dioxide is the major pollutant among the air pollutants. And the lichen as a botanical indicator have been used to predict the air pollution level. This study was carried out to evaluate the air pollution level in Taejon area through the field survey which were checked lichen status and sulfur dioxide content in the atmosphere. The results were as follows 1. The average sulfur dioxide content in Taejon area was 0.031ppm. The comparison of measurement methods were regression equation, Y= 0.357$\times$+0.014 and correlation factor, r = 0.771. 2. The maximum point of the SO$_2$ level was site No. 2(Daehwa-Dong), 0.087 ppm and the minimum, site No. 8 (Doma 2-Dong), 0.009ppm. 3. Total amounts of sulfur dioxide yearly emitted from Taejon area by fuel consumption estimated 29829.6 tons. 4. The relationship between degree of lichen and sulfur dioxide contents were 0.000~0.020ppm : Zone No. 2 0.020~0.060ppm : Zone No. 1 over 0.060ppm : Zone No. 0

• 대한간호학회지
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• 제18권2호
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• pp.118-127
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• 1988

This descriptive-correlational study was undertaken in order to examine if there was relationship between health locus of control and health behavior of 122 residents in Choong Nam Province. The sampling method was non-probability, conventent sampling technique. Questionnaire survey was conducted from March 2 to March 11, 1988. Each participant completed the Multidimensional Health Locus of control(MHLC) scale (Wallsten & Wallston, 1978) and Health Behavior scale (developed by Dr. cho) The collected data were analyzed using Peason Correlation coefficient, t-test and Analusis of Variance. The results were as follows : 1. Hypothesis 1, stating that the higer the score of internal health locus of control, the higher the Score of level of actual implementation of health behavior was supported(r＝.1344, p＜.05). 2. Hypothesis 2, stating that the higher the score of chance health locus of control, the lower the score of level of actual implementation of health behavior was not supported (r＝-.1344, p＞.05). 3. Hypothesis 3, stating that the higher the score of internal health locus of control, the higher the score of the level of perceived importance of health behavior was supported (r＝.3373, p＜.001). 4. Hypothesis 4, stating that the higher the score of chance health locus of control, the lower the score of level of perceived importance of health behavior was not supported (r＝-.0810, p＞.05). 5. The mean score of internal was 23.36, powerful others was 19.04 and chance 15.36 out of maximum range of 6-30 respectively. The mean score of level of actual implementation of health behavior was 112.84 and level of perceived importance of health behavior 143.60 our of maximum range of 32-160 respectively. 6. The variances which were related with the level of actual implementation of health behavior, were education level, occupation, economic status, referred method of primary health, management and resicent's place. And the variance which were related with the level of perceived importance of health behavior were sex, economic status and occupation.

• 농업과학연구
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• 제25권2호
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• pp.154-159
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• 1998

본 시험은 시비량의 차이가 생강의 생육 및 수량에 미치는 영향을 구명하기 위하여 수행한 시험 결과를 요약하면 다음과 같다. 1. 초장은 감량구에서 45.3cm, 표준구에서 52.6cm 증량구에서 49.4cm로 표준구가 가장 크게 나타났다. 2. 엽면적과 경수, 경직경은 증량구가 표준구에 비하여 높게 나타났으며, 지상부와 근경의 건물중도 증량구에서 가장 높게 나타났다. 3. 경수, 경직경, 엽면적, 지상부 건물중, 근경의 생체중 등이 비료 수준과의 관계에서 감량구와 표준구간, 감량구와 증량구간에 유의성이 인정되었다. 4. 수량은 감량구에서 1653kg/10a, 표준구에서 2248kg/10a, 증량구에서 2428kg/10a로 증량구가 표준구에 비하여 7.4%의 증수 효과를 나타냈다.