• Proceedings of the ESK Conference
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• 1997.04a
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• pp.203-211
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• 1997

본 연구는 기온$15^{\circ}C{\pm}1^{\circ}C$ $26^{\circ}C{\pm}1^{\circ}C$,습도$55%{\pm}5%$ 환경조건에서 손가락 끝마디 부분을 얼음물에 침지시킨후 구강온과 4부위 피부온, 손가락끝 피부온, 전신온냉감, 전신쾌적감, 손가락 끝 동통감의 변화를 젊은 남자 피험자와 노인남자 피험자를 대상으로 비교측정하고자 하였다. 본 학회에서는 젊은 남자피험자 그룹에 대하여 보고하고자 한다. 결과는 다 음과 같다. $15^{\circ}C{\pm}1^{\circ}C$에서 4부위 피부온을 보면 가슴과 상완은 손가락끝 침지시 약간 하강하고 다시 상승하지만 대퇴와 하퇴에서는 하강하고 그 상태가 유지된다. 특히 하퇴의 경우는 급격히 하강하는 경향을 보이고 있다. 손가락끝 피부온은 손가락 침지와 동시에 급격한 하강을 나타내나 손가락을 꺼낸후에 손가락 침지전의 온도로 회복되지는 않았다. 평균피부온을 보면 손가락 침지시 하강하는 경향을 보이고 있다. 전신 쾌적감은 약간 불쾌하게 나타났고, 전신온냉감은 서늘하다고나타났고 손가락끝의 동통 감은 매우 아프다고 나타났다. $26^{\circ}C{\pm}1^{\circ}C$에서 4부위 피부온을 보면 가슴 상완대퇴 하퇴 모두 손가락끝 침지시 약간 하강하고 낮은 상태로 유지되는 경향을 보이고 있다. 손가락끝 피부온은 손가락 침지시 급격한 하강을 나타내었고 손가락을 꺼낸후에도 침지의 온도로 회복이 되었다. 평균피부온은 손가락 침지후에 약간 하강하였지만 큰 차이는 없었다. 전신쾌적감은 약간 쾌적하게 나타났고 전신온냉감은 약간 따뜻하다라고 나타났으며 손가락끝의 동통감은 약간 아프다고쪽으로 나타났다.때문에 이를 디자인에 곧바로 적용시키기 어려운 점이 있다. 이에 본 연구는 기존의 바용성 평가를 위한 분석도구들이 갖는 문제 점들 해결하여 제품의 사용자 인터페이스 디자인 개발과정에서 활용할 수 있는 평가 분석도구를 개발하는 것을 목표로 한다. 이를 위해 첫째, 다양한 유형의 정보를 포함하는 비디오 정보를 선정하였따. 둘째, 데이터를 다양한 측면에서 추출할 수 있는 Data logger를 개발하였다. 셋째, 데이터를 시각적으로 정리하고 분석할 수 있는 도구를 제안한다. 마지막으로 인터페이스 디자인에서 여러 가지 디자인안을 도출해 내는 작업에 이용할 수 있는 종합화과정을 개발한다. 이러한 일련의 과정이 통합된 컴퓨터 시스템 안에서 이루어지도록 프로그램을 개발하여 정보의 유용성을 높일 수 있도록 한다.at the entropy index as a measurement of inter-business relatedness is not significant but technological relatedness index is significant. OLS estimates on pooled data were considerably different from FEM or REM estimates on panel data. By introducing interaction effect among the three variables for business portfolio properties, we obtained three findings. First, only VI (Vertical integration) has a significant positive correlation with ROS. Second, when using TFP growth as an depende

• KDI Journal of Economic Policy
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• v.30 no.1
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• pp.33-70
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• 2008

This paper examines sources of growth of Korea's economy for the period from 1980 to 2005, based on both primal and dual growth accounting methodology employed by Young (1995) and Hsieh (2002). Also, this paper evaluates post-crisis growth performance of Korea, using cross-country comparison of growth accounting results and cross-country regressions. Main results of this paper are as follows. First, the growth slowdown after the crisis has been mainly driven by the slowdown of per worker capital accumulation. By contrast, the estimated TFPG of Korea for the period from 2001 to 2005 seems higher than, or at least roughly comparable to, the estimated TFPG in the pre-crisis period of 1991-1995. In theses respects, there were no substantial differences between the results obtained from primal and dual growth accounting methodology. Second, the cross-country regressions revealthat post-crisis growth slowdown of the Korea's economy can be largely attributed to world growth slowdown (decade effect) and East Asia-specific effects. In particular, it was found that the noticeable decelerationin per worker capital accumulation can be mostly attributed to some unknown factors which commonly affected East Asian countries. Viewed from an international perspective, the lowered post-crisis per worker GDP growth rate, as well as per-worker capital growth, which triggered concerns and debates in varying contexts, still seems respectable. So, the slowdown in capital accumulation is likely to be mainly a story of spectacularly high rate of capital accumulation in the pre-crisis period, not a story of 'weak' investment after the crisis.

• Journal of Technology Innovation
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• v.22 no.3
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• pp.225-260
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• 2014

In this paper, we present a literature review of the mechanisms and methodology for technology spillover, in order to provide a theoretical and practical foundation for estimating the technology spillover effect of public funded R&D programs. Our research consists of four parts. First, we investigate what technology spillover is and how it works. Second, we review the methodology used to empirically measure technology spillover, with a view to understanding the advantages and disadvantages of each method. Third, we identify the gap between the spillover phenomenon and its estimated results, caused by the limitations of the methodology, and discuss the challenges in measuring technology spillover. Finally, we present several considerations to improve the measurement of technology spillover in the context of public funded R&D programs. Our paper provides policy makers and researchers with basic knowledge about technology spillover and helps them suitably evaluate the results obtained from the literature review. In addition, it contributes towards improving the existing methodology by recognizing the gap between the spillover phenomenon and the methodology.

• Journal of The Korean Society of Inherited Metabolic disease
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• v.3 no.1
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• pp.86-93
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• 2003

Background : The SCL began screening of newborns and high risk group blood spots with tandem mass spectrometry (MS/MS) in April 2001. Our goal was to determine approximate prevalence of metabolic disorders, optimization of decision criteria for estimation of preventive effect with early diagnosis. This report describes the ongoing effort to identify more than 30 metabolic disorders by MS/MS in South Korea. Methods : Blood spot was collected from day 2 to 30 (mostly from day 2 to 10) after birth for newborn. Blood spot of high risk group was from the pediatric patients in NICU, developmental delay, mental retardation, strong family history of metabolic disorders. One punch (3.2 mm ID) of dried blood spots was extracted with $150{\mu}L$ of methanol containing isotopically labelled amino acids (AA) and acylcarnitines (AC) internal standards. Butanolic HCl was added and incubated at $65^{\circ}C$ for 15 min. The butylated extract was introduced into the inlet of MS/MS. Neutral loss of m/z 102 and parent ion mode of m/z 85 were set for the analyses of AA and AC, respectively. Diagnosis was confirmed by repeating acylcarnitine profile, urine organic acid and plasma amino acid analysis, direct enzyme assay, or molecular testing. Results : Approximately 31,000 neonates and children were screened and the estimated prevalence (newborn/high risk group), sensitivity, specificity and recall rate amounted to 1:2384/1:2066, 96.55%, 99.98%, and 0.73%, respectively. Confirmed 28 (0.09%) multiple metabolic disorders (newborn/high risk) were as follows; 13 amino acid disorders [classical PKU (3/4), BH4 deficient-hyperphenylalaninemia (0/1), Citrullinemia (1/0), Homocystinuria (0/2), Hypermethioninemia (0/1), Tyrosinemia (1/0)], 8 organic acidurias [Propionic aciduria (2/1), Methylmalonic aciduria (0/1), Isovaleric aciduria (1/1), 3-methylcrotonylglycineuria (1/0), Glutaric aciduria type1 (1/0)], 7 fatty acid oxidation disorders [LCHAD def. (2/2), Mitochondrial TFP def. (0/1), VLCAD def. (1/0), LC3KT def. (0/1). Conclnsion : The relatively normal development of 10 patients with metabolic disorders among newborns (except for the expired) demonstrates the usefulness of newborn screening by MS/MS for early diagnosis and medical intervention. However, close coordination between the MS/MS screening laboratory and the metabolic clinic/biochmical geneticists is needed to determine proper decision of screening parameters, confirmation diagnosis, follow-up scheme and additional tests.

• Journal of Korea Port Economic Association
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• v.22 no.3
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• pp.59-78
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• 2006

The purpose of this paper is to analyze the trend on scale efficiency of the Port of Gwangyang from 1994 to 2004 using CCR, BCC, and Malmquist index approaches. The main results are as follows. first, scale efficiency shows a 50% similar [5(94/95, 95/96, 97/98, 2001/2002, 2003/2004) out of 10] pattern to technical efficiency change. Second, total factor productivity increased at 48.57% rate of growth on average in 6 out of 10 periods except 96/97, 97/98, 99/2000, and 2000/2001. 2003/2004 period is the one period experiencing rapid total factor productivity changes, mainly due to technical progress. Third, the ranking order of accumulative indices is scale efficiency change, TFP change, efficiency change, technical change, and pure efficiency change. The main policy implication of this paper is that according to the CCR, BCC, and Malmquist results, the Port of Gwangyang should develop the plan for enhancing the 5 Malmquist indices with following the management way of benchmarking ports.