• Journal of Nutrition and Health
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• v.55 no.5
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• pp.572-586
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• 2022

Purpose: This study examined the factors that may affect the growth status of preterm infants. Methods: This study included 91 preterm infants born at <37 weeks of gestation (22.9-36.9 weeks of gestation), including 48 (52.7%) males and 43 (47.3%) females. Diet-related data were collected through parental questionnaires, and growth-related data, such as height and weight, were collected through the hospital medical records. Results: No significant difference in weight and growth was observed between early and late preterm infants. On the other hand, smaller averages of all weight z-score (recent weight at 40 weeks of gestation) included lower birth weight, height, and head circumference. On the other hand, infants' birth weight, height, and head circumference in the weight z-score of <0 (<50% in the age-weight growth chart) was smaller than those in the weight z-score of ≥0. Furthermore, neonatal intensive care unit (NICU) hospitalization period and NICU discharge were shorter with growth cessation age in weight z-score of <0. The weight growth velocity was associated with gestational age, birth weight, and medical treatment in the NICU. Thus, parents of preterm infants with low growth rates prefer more community care services for their children. Conclusion: Birth weight, age of preterm infants, and medical treatment in the NICU were factors related to early birth weight growth. Following NICU discharge, poor intake and intake issues were associated with poor growth after 40 weeks of gestation. Therefore, monitoring the growth of preterm infants requires continuous active involvement and supports for growth-promoting factors after NICU discharge.

• Korean Journal of Poultry Science
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• v.48 no.4
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• pp.193-206
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• 2021

This study aimed to identify the growth performance of Korean indigenous chicken pure-line by sex and twelve strains conserved in Poultry Research Institute, National Institute of Animal Science, Rural Development Administration. The effect of sex and strain on body weight was significantly different in every period, with males being heavier in all periods than females. In the case of biweekly weight gain, the tendency to increase rapidly from birth to six weeks old, and to decrease in the period from twelve to fourteen weeks old was common across all sex and strains. Depending on sex and strain, there were significant differences in age and the number of peaks. Regardless of sex and strain, the determination coefficient and adjusted determination coefficient showed high goodness of fit (99.1~99.9%) to growth functions. However, for each model, the goodness-of-fit had variations by sex and strains. von Betalanffy function had the best fit to growth curves in all the female strains except strain D. On the other hand, Gompertz function had the best fit for all the male strains except strain C. Logistic function showed the lowest goodness-of-fit in all sex and strains. Mature weights were in the order of von bertalanffy, Gompertz, and Logistic models, while growth ratio and maturing rate followed the order of logistic, gompertz, and von bertalanffy functions. This information could be useful for Korean indigenous chicken management and designing crossbreeding tests and breeding programs.

• Proceedings of the Optical Society of Korea Conference
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• 2003.02a
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• pp.78-79
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• 2003

타원법(ellipsometry)을 사용하여 광기록 매체용 Ge$_2$Sb$_2$Te／sub 5／(GST) 박막의 성장과정에 따른 타원상수 Ψ와 $\Delta$를 측정하여, GST 박막의 최적성장조건을 연구하였다. 아르곤기체압력과 DC 출력 그리고 기판의 온도를 변화시키면서 GST 박막을 성장시켰다. 제작된 시료들의 분광타원 데이터를 모델링분석하여 GST 박막의 밀도분포를 구하고 한편으로는 GST 박막이 성장하는 동안 측정한 in situ 타원 성장곡선을 분석하여 박막의 밀도분포의 변화를 추적하였다. (중략)

• Proceedings of the Korea Technology Innovation Society Conference
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• 2016.10a
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• pp.77-90
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• 2016

• Journal of Animal Science and Technology
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• v.45 no.5
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• pp.711-724
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• 2003

Some growth curve models were used to fit individual growth of 1,083 Hanwoo cows born from 1970 to 2001 in Daekwanryeong branch, National Livestock Research Institute(NLRI). The effects of year-season of birth and age of dam were analyzed. In analysis of variance for growth curve parameters, the effects of birth year-season were significant for mature weight(A), growth ratio(b) and maturing rate(k)(P〈.01). The effects of age of dam were significant for growth ratio(b) but not significant for mature weight(A) and maturing rate(k). The linear term of the covariate of age at the final weights was significant for the A(P〈.01) and k(P〈.01) of Gompertz model, von Bertalanffy model and Logistic model. For the growth curve parameters fitted on individual data using Gompertz model, von Bertalanffy model and Logistic model, resulting the linear contrasts(fall-spring), Least square means of A in three nonlinear models were higher cows born at fall and A of Logistic model was significant(P〈.05) between the seasons. According to the results of the least square means of growth curve parameters by age of dam, least square means of mature weight(A) in Gompertz model was largest in 6 year and smallest estimating for 3 and 8 years of age of dam. The growth ratio(b) was largest in 2 year of age of dam and smallest estimating in 8 year. The A and k were not different by age of dam(p〉.05), On the other hand, the b was different by age of dam(p〈.01). The estimate of A in von Bertalanffy model was largest in 6 year and smallest in 8 and 9 years of age of dam. The b was largest in 2 year and tend to decline as age of dam increased. The A and k were not different by age of dam(p〉.05), On the other hand, the b was highly significant by age of dam(p〈.01).

• Environmental and Resource Economics Review
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• v.12 no.4
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• pp.579-609
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• 2003

The role of foreign direct investment (FDI) as a channel of knowledge transfer and on the technological spillovers of know-how to other sectors in the economy is in the middle of this debate. Thus, foreign direct investment may have significant positive effects in reducing residual loadings and environmental pollution. There is an abiding concern expressed by many commentators that countries will lower their environmental standards to attract foreign investment, thereby creating so-called "pollution havens." Others argue that increasing foreign investment could promote "pollution halos" by introducing and transferring more efficient and less polluting technologies. The primary objective of this study is to show the dynamic relationship among pollution loadings, pollution abatement effort, and economic development with explicit consideration of FDI-related effects. This study found when foreign direct investment is evaluated in the model, the environmental pollution level is reduced and expenditure on pollution abatement is increased.

• Proceedings of the KSMRM Conference
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• 2003.10a
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• pp.21-21
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• 2003

목적： 악성뇌종양 주변부위의 역동자기공명영상에서의 시간신호강도곡선 양상으로 종양의 성장 양상이나 예후를 판단할 수 있는지를 알고자 한다. 대상 및 방법： Anaplastic oligodendroglioma 3예, Anaplastic astrocytoma 1예, Glioblastoma multiforme 1예, Malignant ependymoma 2예, Medulloblastorna 1예로서, 총 8예의 종양절제전, 혹은 후의 잔류 종양을 대상으로 하였다. Routine MRI에 추가하여 종양부위에서 Turbo spin echo T1 강조 역동자기공명영상을 하였으며, Gd-DTPA 0.1 mmol/kg를 급속 주사 한 후, TR/TE, 350/15, slice thickness 6 mm, slice number 3, NEX 2회, scan time은 15 초로 하여 5 분 동안 20회 영상을 얻었다. 가시적으로 조영증강이 없는 종양의 주변부위나 수술경계부위에 관심영역을 그려서 시간신호강도곡선을 얻었으며, 첫 회 조영제 통과시의 peak 이후에 신호가 감소하는 경우를 Normal pattern으로, peak 이후에 신호가 계속 유지되거나 증가하는 경우를 Tumor pattern으로 하였으며, Normal pattern과 Tumor pattern을 보인 예들을 구분하여 종양의 재성장 상태와 환자의 생존 기간을 비교 관찰하였다.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.419-419
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• 2019

우리나라에서는 인공하천 중심의 개발에서 자연형 하천 복원으로 변화가 진행 중이다. 이에 따라 강우 발생에 따른 하도와 식생의 빈번한 변동이 발생하고 있다. 하천 내의 하도와 식생은 물과 유사의 상호작용을 바탕으로 형성되는 하상 형태로 하도와 식생의 변동은 건강한 하천을 나타내는 하나의 지표이다. 특히 하도와 식생은 하천의 흐름에 영향을 주고 다시 하천의 흐름은 하도와 식생에 영향을 주고받기 때문에 하천 흐름 특성에 핵심적인 요소로 볼 수 있다. 따라서 이에 대한 장기간의 모니터링이 필요하며 이에 따른 수위-유량관계를 규명할 필요가 있다. 본 연구에서는 만경강 유역에 위치한 완주군(용봉교)관측소를 대상으로 2017년부터 2018년까지 식생 및 하도 모니터링을 통한 수위-유량관계 변화를 분석하였다. 2017년에는 식생의 활착, 성장, 소멸에 따라 9개의 기간분리가 발생하였으며, 2018년에는 8개의 기간분리가 발생하였다. 2017년은 저수위1로 시작하여 성장 및 소멸을 반복하다 저수위3으로 회귀하였으며, 2018년은 2017년 저수위 3으로 시작하여 성장과 소멸을 반복하다 저수위9로 회귀하는 특성을 보여 주었다. 결과적으로 본 연구에서는 하천 내의 식생과 하도 변화에 대한 장기 모니터링과 흐름 특성이 변화하는 기간의 유량측정성과 확보를 통한 신뢰도 높은 수위-유량관계곡선식을 개발하였고 이를 통해 생산된 유량자료는 정확도가 매우 높은 것으로 분석되었다.

• Journal of Animal Science and Technology
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• v.45 no.4
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• pp.509-516
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• 2003

Growth curves were estimated for 1083 female Korean cattle raised in Daekwanryeong branch, National Livestock Research Institute (NLRI). Comparisons were made among various growth curve models for goodness of fit for the growth of the cows. Estimated growth curve functions were $W_t=370.2e^{-2.208e^{-0.00327t}$ for Gompertz model, for von Bertalanffy model, and $W_t=341.2(1+5.652e^{-0.00524t})^{-1}$ for Logistic model. Ages at inflection estimated from Gompertz model, von Bertalanffy model and Logistic model were 242.2 days, 191.5 days, and 330.5 days respectively, body weight at inflection were 136kg, 115kg, and 170kg, and daily gain at inflection were 0.445kg, 0.451kg, and 0.446kg. The predicted weights by ages from Gompertz model, von Bertalanffy model, and Logistic model were onsistently overestimated at birth weight and underestimated at 36 month weight. The von Bertalanffy model which had a variable point of inflection fit the data best.

• Journal of Environmental Policy
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• v.2 no.1
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• pp.77-86
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• 2003

Particle-size distributions (PSDs) are widely used for the estimation of soil hydraulic properties. The objective of this study was to select the best model among the nine PSD models with different underlying assumptions, by using a variety of Korean soils. The Fredlund model with four parameters, the logistic growth curve, and Weibull distribution model showed the highest performance compared to the other models with the majority of soils studied. It was interesting to find that the logistic growth function with no fitting parameters showed a great fitting performance.