• 산업공학
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• 제19권1호
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• pp.19-25
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• 2006

In the development process, the objective of a reliability growth program is to track the increase in system reliability, and determine as early as possible whether or not the system reliability is growing at a sufficient rate to meet the required goal and allocate available resources accordingly. Implementation of this kind of program will provide very useful information on concept selection, product/process reliability, and cost effectiveness without too much time, money and engineering effort being spent on the development of failure suspect parts. The purpose of this research is to present a practical method for efficiently monitoring a reliability growth test process using AMSAA(Army Materiel Systems Analysis Activity) reliability growth model. The presented growth management is a viable method for identifying failure modes, incorporating design changes and monitoring reliability progress on an on-going basis during the early stages of a product development program.

• 한국신뢰성학회지:신뢰성응용연구
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• 제5권3호
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• pp.381-391
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• 2005

The level of reliability attained largely depends upon the investment in reliability growth programs during development phase. In order to find the relationship between reliability growth test time and BRTE(basic reliability tasks effectiveness) in a reliability improvement program that minimizes LCC in which contains the reliability growth cost, repair and replacement costs, and spare parts ordering costs in service with given service rate in management policy, the growth rate has been suggested proper LCC versus growth rate. This model employs the reliability growth projection with delayed fixes in avionic equipment based on AMSAA.

• The Journal of Asian Finance, Economics and Business
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• 제7권6호
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• pp.109-116
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• 2020

The study examines the nexus between financial development and economic growth in India during Q1: 1996 to Q3: 2018. This study employs time-series data of real GDP and ratio of broad money to GDP as a proxy for economic and financial development, respectively. The data are obtained from RBI database on the Indian economy. All variables are seasonally adjusted using X12-arima technique and expressed in natural logarithm form. Non-linear Autoregressive Distributed Lag (NARDL) bound test has been used to check for cointegrating relationship of these two variables. Empirical findings suggest that, unlike in the short run, in the long run financial development does impact economic growth positively. Further, a symmetric effect of positive and negative components of financial development is found for the Indian economy, whereas the effect of control variable like exchange rate and trade openness is in consonance with common economic intuition. Exchange rate is in consonance with intuitive economic logic that a fall in exchange rate makes exports cheaper and increases the quantity of export, which improves the balance of payment and leads to a rise in aggregate demand, hence improves economic growth. This paper contributes to the existing literature on India by breaking down financial indicator into positive and negative components to examine the finance-growth relationship.

• KDI Journal of Economic Policy
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• 제36권1호
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• pp.107-126
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• 2014

신고전파 성장이론의 핵심은 자본투자라 할 수 있다. 솔로우는 이러한 자본축적을 통한 균형성장 경로에 안정성을 부여하는 기제로 수확체감의 원리를 제시한다. 이 핵심 명제는 지속가능하며 효과적인 개발정책에 자본축적을 통한 정상(定常) 상태 성장뿐 아니라 이행과도기 성장과정에 있어서 생산성의 중요성에 대해 중대한 함의를 가진다. 본 논문은 이러한 솔로우 모형의 함의를 뒷받침하는 근간이 되는 가정인 수확체감의 법칙에 대한 테스트를 위한 실증방법론을 제시하고 Penn World Tables 제8버전 데이터를 이용하여 자본축적 과정에 수확체감이 강하게 작용함을 확인하고, 이에 효과적 개발정책에 대한 솔로우 모형의 함의를 입증한다.

• Journal of Plant Biotechnology
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• 제30권2호
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• pp.173-177
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• 2003

The effect of IBA and NAA on adventitious root cultures of Panax ginseng C.A. Mater were investigated. Results indicated differences in growth and development of the roots according to 5mg/L IBA and 2mg/L NAA. IBA resulted in a normal root development and a higher growth compared to NAA. The roots formed on NAA-containing media were shorter and thicker than those in IBA, showing a hypertrophy of the root tip. NAA induced more than 1.6 times higher ethylene production compared to IBA, which caused inhibition of the root growth. Under the ventilation, in the other hand, on difference was observed in ethylene concentration and the root growth between IBA and NAA treatments. Under ventilation ethylene production was not detected until 10 days of culture, while detected from the initial stage under on ventilation. The results suggested the importance of ventilation during the culture for the growth and development of ginseng adventitious roots.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제2권2호
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• pp.82-95
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• 2021

Current international negotiation and cooperation for sustainable development are focused on three main themes. The first theme is implementation of Sustainable Development Goals (SDGs). The second theme is development of measures for climate change. The third theme is sustainable management of biodiversity and ecosystem services. In South Korea, responses of government policies and academic studies have been predominantly to one of these three themes. There have not been many integrated efforts to develop countermeasures considering all three international themes. In addition, while "green growth" policies have been setting national agendas for Korea's sustainable development, they must be scrutinized such as why they have not dealt with some parts of these three themes and whether they have ignored one of these themes due to lack of integrated responses. This study finds critical issues in South Korea on how to harmoniously respond to the three themes of international efforts and improve green growth policies. First, to achieve SDGs, the domestic statistical system must be reorganized to track the achievement of "inclusiveness" and "green growth". Second, the climate change response policy should seek inclusion between countries and between social groups. Third, in the field of biodiversity and ecosystem services, it is necessary to establish Korea's identity in global geopolitics and enhance its own traditional ecological knowledge. Fourth, it is necessary to consider how to solve discrepancy between climate change response policies and biodiversity-ecosystem service management policies. Finally, proactive improvement of laws and institutions must occur to promote inclusive green growth.

• 한국초지조사료학회지
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• 제39권3호
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• pp.148-152
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• 2019

Soil acidity or alkalinity are serious limitations for crop production. The purpose of this study was to clarify the negative effects of extreme pH stress (low and high) on alfalfa vegetative growth (VG) and biomass accumulation (BA). Two-week-old alfalfa seedlings were exposed to different pH (4.0, 4.5, 7.0, 8.0 and 8.5, respectively) levels for 72 hours. Alfalfa grown at pH 4.0 and 8.5 significantly reduced VG and BA, wherein as neutral pH (7.0) comparably exhibited better growth and biomass yield. These results indicate that extreme acidic or alkaline level are critical limiting factors for growth and biomass yield in alfalfa.

• Journal of Korea Trade
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• 제25권1호
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• pp.18-33
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• 2021

Purpose - This paper investigates the causal relationship between logistics infrastructure development and the economic growth of Korea. Considering the industrial and economic structure of Korea, it is likely that logistics infrastructure is positively associated with the economic growth of the country. Design/methodology - The causal relationship between logistics infrastructure and economic development is estimated using Vector Autoregressive (VAR) and Vector Error Correction Model (VECM) considering long-run equilibrium between the two factors. To this end, a dataset consisting of 7 logistics infrastructure proxies and 5 economic growth indicators covering the period of 1990-2017 is used. Findings - It was found that causality, in general, runs from logistics infrastructure development to economic growth. Specifically, the results indicate that maritime transport is positively associated with the economic growth of Korea in terms of GDP and international trade. In addition, other modes of transport also have a positive impact on either the GDP or international trade of Korea. Originality/value - While existing studies in this area are based on either regional observations or a specific mode of transport, this study presents empirical evidence on causality between logistics infrastructure and the economic growth of Korea using a more comprehensive dataset. In addition, the findings in this paper can provide valuable implications for transport infrastructure development policies.

• 보건교육건강증진학회지
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• 제14권1호
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• pp.161-172
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• 1997

In order to assess the physical growth and development, and nutritional status of primary, middle and high school students in the city of Seoul, physiques of 4, 041 persons(Male : 2, 096, Female: 1, 945) were measured from March 1 to July 31 in 1995 and variouis physical and nutritional indices, maximum growth age related to them were calculated. The results are as follows: 1. Physical Growth and Development The growth of body height showed straight linear development among male in the ages 7~16 and among female 7~14, and after that showed slower development. The age of cross over between two sexes was between 11.5 to 12.5 years of age. The maximum growth age was between 11 and 12 years of age(7.28cm) in male and between 11 aqnd 12 years of age(9.77cm) in female. In terms of body weight, it also showed straight linear development among male in the ages 7~16 and among female 7~14, and after that showed slower development. The maximum growth age was between 11 and 12 years of age(7.64kg) in male and between 11 and 12 years of age(8.l9kg) in female. In terms of chest girth, it showed two step development among male in the age of 7~13 and 13~17, and among female in the age of 7~14 and 14~17. The age of cross over between two sexes was 11 and 12 years of age. In terms of sitting height, it showed two step development in the age of 7~14 and 14~17 of both sexes and the age of cross over between two sexes was between 10.5 to 14.5 years of age. The maximum growth age was between 11 and 12 years of age(3.64cm) in male and between 11 and 12 years of age(5.98cm) in female. 2. Maximum Growth Age of Physical Growth and Development In body height, MGA was 10.59 for male and 10.34 for female which showed that MGA for both sexes appeared in similar periods. In body weight, MGA was 10.30 for male and 10.30 for female which showed that MGA for both sexes appeared in similar periods. In chest-girth, MGA was 14.74 for male and 11.60 for female which showed that MGA for female appeared about 3 years earlier than for male. In sitting height, MGA was 11.69 for male and 11.38 for female which showed that MGA for both sexes appeared in similar periods. Maximum growth ages of physiques appeared in order of body height 〉 body weight 〉 sitting height 〉 chest-girth.

• Journal of Preventive Medicine and Public Health
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• 제26권3호
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• pp.347-358
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• 1993

The purpose of this study is to analyze the relationship between the blood pressure level and their sexual maturity and physical growth in the children at puberty. For this purpose, we estimated the blood pressure, physical growth and sexual maturity of the boys of 335 and girls of 373 who are in the middle schools which are located in Kangwha County, Kyungki-Do. Both systolic and diastolic pressure were measured twice. Such physical growth as height, body weight, skin fold thickness, waist circumference, hip circumference and arm circumference were measured. The sexual maturity was estimated according to the classification of Tanner's 5-phase-sexual-maturity : in boys, their pubic hair development phase : in girls, their pubic hair and breast development phase and the menstrual experience. In the phase of the pubic hair development, the boy's sexual maturity was distributed into this; the 1 st 56.4%, the 2nd 29.3%, the 3rd 9.9%, the 4th 4.1% and the 5th 0.3%. While the girls sexual maturity was distributed into this the 1st 20.5%, the 2nd 34.9%, the 3rd 30.6% the 4th 12.6% and the 5th 1.3% in the phase of the pubic hair development, and the 1st 0.8%, the 2nd 13.7%, the 3rd 36.2%, the 4th 18.8% and the 5th 30.5% in the phase of the breast development. This indicated that the girls sexual maturity was higher than those of the boys. The girls menstrual experience rate accounted to the 58.2%. In order to see the relationship between the children's sexual maturity and blood pressure level, we regress blood pressure level on physical growth (i.e., height, BMI) and sexual maturity. Sexual maturity in treates as dummy variables. As the resulf of this analysis, the boys' sexual maturity has nothing to do with the blood pressure either systolic or diastolic. But the girl's systolic pressure was statistically significant ; the 9% of the physical growth, the 5% of the pubic hair development and the 4% of the breast development in sexual maturity was explained. In the girls' diastolic pressure, only their pubic hair development was statistically significant ; the 7% of the physical growth and the 7% of the pubic hair development in the diastolic was explained and the 5% of the physical growth in the diastolic Korotokoff phase IV and the 2% of the pubic hair development in the diastic Korotokoff phase was explained, especially, the girls exprienced menstruation, their systolic and diastolic pressure were significantly high (P<0.01). Conclusively, in the first grade children attending middle schools who are in the early process of the sexual development, the sexual maturity was not related to blood pressure level, on the other hand, the blood pressure level of the girls who are more sexual development than those of the boys' have something to do with sexual maturity and physical growth.