• Korean Journal of Organic Agriculture
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• v.12 no.4
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• pp.451-461
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• 2004

In an animals, identification system has been widely used by ear tag with dummy code and blood typing for parernity. Also, genotyping methods were using for useful mean of individual identification for live animals. In the case of genotyping estimation of gene in population of korean native chicken. In this study, we tested for development of genetic markers used it possible to determination of individual identification system. The candidate genetic markers were used already bow 10 of microstalite DNA sequence information in chromosome No. 1 and 14. Result of analysis for genotyping, the number of alleles of those microstatelites DNA was shown minimal 3 to 12 and the heterozygote expression frequency range was shown from 0.617 to 0.862. In our result, effective number of allele for each microsatellites DNA was shown 3~7, and the accuracy of individual identification was shown nearly 100%, when used with 6 genetic marker. This study was about genotyping method for identification used specific genetic marker form microsatellite DNA in the brand marketing of korean native chicken. Our results suggest that genotyping method used specific genetic marker from microsatellite DNA might be very useful for determination of individual identification.

• Korean Journal of Hospice Care
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• v.8 no.1
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• pp.49-54
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• 2008

Purpose: In order to evaluate effects of horticulture program on self-esteem of hospice patients, this study was conducted. Methods: Study population consists of 31 patients who had been registered in hospice care of "G" church and hospice unit of "G" hospital in G-city from Oct. 3rd 2007 to Dec. 3rd. As estimation method of self-esteem, self-esteem scale of Rosenberg(1965) was used. Results: The data were analyzed by frequency, paired t-test of SPSS. Self-esteem score before horticulture program was 5.31 and self-esteem score after horticulture program was 5.97. Conclusion: We concluded that horticulture programs had positive effect in self-esteem improvement, and it could be replaced with an intervention method of self-esteem improvement in hospice patients.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.19-19
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• 2019

토양수분은 지표수가 증발, 유출, 침투되는 과정에 중요한 역할을 하는 수문 인자로, 수문학적인 관점에서 물 순환을 이해하는 데 필수적인 요소이다. 그럼에도 불구하고 토양 내 수분을 측정하는 데 어려움이 많아 국내에서는 토양수분의 지속적인 관측을 위한 관측소 운영이 원활하게 이루어지지 않고 있으며, 주로 유전율식 계측 방식을 통해 지점 기반의 토양수분 자료를 생산하는데 그치고 있다. 최근 발사된 토양수분 위성인 SMAP (Soil Moisture Active Passive)을 비롯한 위성기반의 토양수분 자료와 융합하여 사용하기 위해서는 지점에서의 토양수분 네트워크가 우선적으로 구축되어야 하나, 관측소의 수도 부족할 뿐 아니라, 지형이 복잡하고 산지가 많은 한반도에서는 점 단위의 토양수분 자료의 공간적 대표성이 부족하여 활용에 어려움이 많다. 따라서 본 연구에서는 운영중인 지점 기반의 토양수분 관측소의 FDR (Frequency Domain Reflectometry), TDR (Time Domain Reflectometry) 센서를 함께 활용하여 산악지형에서의 Cosmic-ray 기반 토양수분자료를 생산하고자 한다. 산악지형에서의 Cosmic-ray 센서는 토양 유기물과 식생 차단 등에 의한 영향이 많으므로 평지에서 토양수분을 산정하기 위한 교정 함수들의 비교 및 평가를 실시하였다. 일반적으로 평지에서 활용되는 교정 함수들은 강우에 따른 토양수분의 거동을 잘 나타내고 있는 것으로 확인되었으나, 갑작스러운 강우로 인한 식생 차단과 토양 유기물의 영향이 커지는 경우 토양수분의 급격한 변동성을 표현하기에는 한계가 있는 것으로 나타났다. 이러한 연구를 기반으로 산악지형에서 Cosmic-ray 센서에 영향을 미치는 인자들을 분석할 수 있으며, 추후 산악지형에서 지역 규모의 토양수분을 관측할 수 있는 관측소를 구축하는데 활용될 것으로 기대된다.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.498-498
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• 2018

가뭄으로 인해 발생할 수 있는 가장 심각한 피해는 용수 부족으로 인한 수자원 시스템의 용수공급 실패이며, 따라서 가뭄 위험도는 사용 가능한 용수의 부족과 관련하여 정량화되어야 한다. 이러한 맥락에서 수자원 시스템의 가뭄 위험도를 평가하기 위해 주로 신뢰도(reliability), 회복도(resiliency) 및 취약도(vulnerability)와 같은 세 가지 이수안전도 평가지표가 사용된다. 이러한 평가지표는 각각 용수공급 실패가 평균적으로 얼마나 자주 발생하는지, 얼마나 오래 지속되는지, 또한 어느 정도의 규모로 발생하는지를 위험도를 정량화하는 것으로, 용수공급 실패사상의 빈도, 지속기간 및 심도를 나타낸다. 본 연구에서 DRI(Drought Risk Index)는 신뢰도, 평가도 및 회복도의 가중평균값으로 정의되며, 이는 지속기간과 심도를 변수로 하는 이변량 가뭄빈도해석과 같은 변수를 공유한다. 본 연구에서는 두 가지 형태의 DRI 를 이용하여 지역 가뭄 위험도 평가 기준 산정 방안을 제시하였다. DRI_O(observed DRI)는 용수부족 시계열을 통해 산정된 공급실패 사상으로부터 산정되며, DRI_D(designed DRI)는 이변량 빈도해석을 통해 산정된 특정 지속기간을 갖는 확률가뭄심도로부터 계산된다. 기후변화 시나리오를 이용해 DRI_O 를 산정함으로써 미래의 이수안전도를 예측할 수 있으며, 이를 DRI_D 와 비교하여 지역의 용수부족으로 인한 가뭄 위험도를 산정하는 방법을 제안하였다. 또한 기존에는 주로 과거 최대 가뭄사상을 목표안전도로 설정하였으나 DRI_D 를 이용하여 보다 현실적인 목표안전도를 설정할 수 있다. 낙동강 권역의 10 개 중권역의 10 개 기후변화 시나리오를 대상으로 분석을 수행한 결과 병성천 유역과 형산강 유역이 각각 최저 및 최고 위험도를 갖는 것으로 분석되었으며, 지역 안전도 기준은 평균적으로 재현기간 5-20 년 사이의 범위를 갖는 것으로 나타났다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.397-400
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• 2009

This paper describes ASIC design of Multimedia application SoC platform based RISC processor with BTB(Branch Target Buffer). For performance enhancement of platform, we use a simple branch prediction scheme, BTB structure, that stores a target address for branch instruction to remove pipeline harzard. Also, the platform includes a number of peripheral such as VGA controller, AC97 controller, UART controller, SRAM interface and Debug interface. The platform is designed and verified on a Xilinx VERTEX-4 FPGA using a number of test programs for functional tests and timing constraints. Finally, the platform is implemented into a single ASIC chip which can be operated at 100MHz clock frequency using the Chartered 0.18um process. As a result of performance estimation, the proposed platform shows about 5~9% performance improvement in comparison with the previous SoC Platform.

• Journal of Korea Port Economic Association
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• v.34 no.4
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• pp.181-190
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• 2018

The goal of this study is empirically to investigate the asymmetric relationship between two variables using the dry cargo freight rates and raw material price data from January 2012 to May 2018. First, we estimate the asymmetry of macroeconomic indicators of commodity prices by using a two - step threshold cointegration test. Second, the asymmetric relation test of the trade balance of existing commodity price changes is tested by bypassing to the high frequency dry cargo freight rate index. As a result of the estimation, in contrast to the existing linear analysis, each boundary value for the lower limit and the upper limit has different asymmetry. This implies that the period of fluctuation of the sudden residual that causes irregular rate of return fluctuations does not establish a long term equilibrium relationship between the raw material price and the dry cargo freight rate. Therefore, in order to consider the sudden price change in the analysis, it is necessary to include the band of inaction that controls the irregular volatility, which is consistent with the asymmetry hypothesis.

• Journal of the Korean Society for Railway
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• v.11 no.5
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• pp.489-498
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• 2008

In general, deflection limit criteria of bridge design specifications have been considered based on static serviceability and structural stability. Dynamic serviceability induced from bridge vibration actually has not been included in the criteria. Thus, it is necessary for deflection limit to be considered in order to check dynamic service- ability on bridge vibration. In this study, The allowable displacement of Korea Railway Bridge Design Specifications is compared to the frequency domain comfort limit and analyzed france code and japanese code. Korea Railway Bridge Design Specifications is regulated based on the train speed. Such is because the vibration time duration is partly considered. but this criteria is not satisfied with comfort limit. and, it is estimated to be capable to provide deflection limit considering dynamic serviceability. In order to evaluate the dynamic serviceability of various types of railway bridges in current public were selected and their dynamic signals were measured. and the result of the bridge-train interaction analysis according to the changes in bridge stiffness was compared to the comfort limit to suggest the stiff-ness limit to the dynamic serviceability, which should conveniently be applied at the field.

• The Journal of the Acoustical Society of Korea
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• v.40 no.4
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• pp.359-369
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• 2021

In underwater communications, to compensate performance degradation induced from rapidly changing channel transfer characteristic, multi-band communication method which allocate the same data to different frequency bands is used. However, the multi-band configuration may have worse performance than the single-band one because performance degradation in a particular band affects the output from the entire bands. This problem can be solved through a receiving end that analyzes error rates of each band, sets threshold values and allocates lower weights to inferior bands. Therefore, this paper proposed a weighting algorithm based on estimated Bit Error Rate (BER) which analyzes reliability of received data based on the performance difference between demodulated and decoded data. Employing turbo codes with coding rate of 1/3, we evaluate the performance of the proposed weighted multi-band transmission model in real underwater environments based on optimal simulation parameters. Through the sea trial experiment, we confirmed error performance was improved by applying the proposed weighting algorithm.

• Journal of Korean Society on Water Environment
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• v.35 no.4
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• pp.340-351
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• 2019

In this study, the relationship between trophic state indices was analyzed based on the monthly or weekly water quality data of 81 lakes (mostly man-made) in Korea between 2013-2017. Carlson's $TSI_C$ and Aizaki's $TSI_m$ were calculated using the summer (Jun.-Sep.) average data at the upper water layer. The previous Korean trophic state index ($TSI_{KO}$) and the newly suggested index ($TSI_{KON}$) was calculated using the annual average data at the whole layer and at the upper layer, respectively. While previous trophic state index (TSI) such as Carlson's TSI included logarithmic function, we devised newly Monod-type $TSI_{KON}$(Chl) that is 50 when half-saturation concentration of chlorophyll ${\alpha}$ ($Chl.{\alpha}$) measured by UNESCO-method is $10{\mu}gL^{-1}$. MMF-type $TSI_{KON}$(TP) was derived based on the relationship between TP and $Chl.{\alpha}$. A comprehensive $TSI_{KON}$ was decided as the larger one of the two $TSI_{KON}$ values. The range of previous TSI was usually 40-50 for the mesotrophic state, which seemed narrow to discriminate trophic characteristics of the class. The upper limits of $TSI_{KON}$ for oligotrophic, mesotrophic, and eutrophic state were set to 23, 50 and 75, respectively. Classification by $TSI_C$ and $TSI_m$ showed higher frequency of eutrophic class compared to $TSI_{KO}$ and $TSI_{KON}$. This means that the estimation by TSIs developed in foreign natural lakes can lead to distorted results in the classification of the trophic state of Korean lakes. This is due to the decrease of transparency by non-algal material and the reduction in phosphorus availability to algal growth, particularly in Monsoon period.

• Journal of Environmental Science International
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• v.28 no.7
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• pp.617-627
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• 2019

This study investigated the relationship between heat-related illnesses obtained from healthcare big data and daily maximum temperature observed in seven metropolitan cities in summer during 2013~2015. We found a statistically significant positive correlation (r = 0.4~0.6) between daily maximum temperature and number of the heat-related patients from Pearson's correlation analyses. A time lag effect was not observed. Relative Risk (RR) analysis using the Generalized Additive Model (GAM) showed that the RR of heat-related illness increased with increasing threshold temperature (maximum RR = 1.21). A comparison of the RRs of the seven cities, showed that the values were significantly different by geographical location of the city and had different variations for different threshold temperatures. The RRs for elderly people were clearly higher than those for the all-age group. Especially, a maximum value of 1.83 was calculated at the threshold temperature of $35^{\circ}C$ in Seoul. In addition, relatively higher RRs were found for inland cities (Seoul, Gwangju, Daegu, and Daejeon), which had a high frequency of heat waves. These results demonstrate the significant risk of heat-related illness associated with increasing daily maximum temperature and the difference in adaptation ability to heat wave for each city, which could help improve the heat wave advisory and warning system.