• 한국환경생태학회지
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• 제36권5호
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• pp.496-506
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• 2022

이식 과정을 통해 식재된 수목은 뿌리 절단, 수관 훼손과 같은 극단적인 교란으로 인해 식재 직후 생장량은 급격히 감소한다. 이후 시간이 경과하면서 원래의 생장량을 회복하는데 이때 소요되는 시간은 수종별로 차이가 있다. 따라서 이식 후 활착을 위한 수목관리를 위해 수종별 연간생장량의 변화를 분석하여 적정 관리 기간을 설정할 필요가 있다고 판단하였다. 이에 본 연구에서는 수변생태벨트 조성 지역에 식재된 낙엽활엽수를 대상으로 생장량을 분석하고 그 결과를 바탕으로 적정 관리 기간을 제안하고자 하였다. 이식과정에서 수목 활착율을 높이기 위해 시행하는 사전 작업인 뿌리돌림, 단근, 가지치기 등으로 인해 식재 직후의 생장량 둔화는 일반적인 현상이다. 이후 시간이 경과하면서 원래의 생장량을 회복하게 되는데, 소요되는 시간은 수종별, 식재 환경 등에 따라 차이가 존재할 수 있다. 연구결과 대부분의 수목은 이식 직후 급격한 생장량 감소를 보이는 것으로 나타났으며. 이후 수종별로 상이하긴 하나 대부분 2년 이후부터 서서히 생장량을 회복하는 것으로 나타났다. 수종별 생장량을 분석한 결과 공통적으로 이식 직후 급격한 생장량 감소를 보인 후, 이식전의 생장 수준을 회복하기 까지는 수종에 따라 2~4년 정도의 시간이 필요한 것으로 확인되었다. 결과적으로, 생태복원 및 오염물질 저감이라는 본 사업의 목적에 부합하기 위해서는 식재한 수목의 하자율 개선이 필요하며, 이를 위해서는 적정한 기반환경을 조성하는 것 외에 최소 2년간의 수목 관리기간을 설정하는 것이 필요하다.

• 폴리머
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• 제25권6호
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• pp.840-847
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• 2001

메탈로센 촉매로 제조된 메탈로센 선형 저밀도 폴리에틸렌(m-LLDPE)과 Ziegler-Natta 촉매에 의하여 제조된 선형 저밀도 폴리에틸렌(LLDPE) 블렌드의 결정화 거동을 고찰하여 보았다. 특히 블렌딩이 이들의 결정화 induction time 및 구정성장 속도 그리고 최대 구정의 크기에 미치는 영향을 중점적으로 살펴보았다. LLDPE/LDPE 블렌드와는 달리 LLDPE에 m-LLDPE를 블렌딩할 경우, 각각의 결정 형성 대신 하나의 결정이 형성됨을 확인하였으며 induction time이 현저히 짧아짐을 알 수 있었다. 하지만 이러한 감소는 블렌드의 조성비에는 크게 영향을 받지 않았다. 또한 블렌딩에 의하여 LLDPE의 구정성장 속도가 증가함을 확인할 수 있었으며, 구정의 최대 크기는 induction time과 구정성장 속도가 LLDPE에 미치는 영향에 따라 달라짐을 알 수 있었다.

• 품질경영학회지
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• 제25권1호
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• pp.44-55
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• 1997

In order to determine procedures for a, pp.opriate model selection of technological growth curves, numerous time series that were representative of growth behavior were collected according to data characteristics. Three different growth curve models were fitted onto data sets in an attempt to determine which growth curve models achieved the best forecasts for types of growth data. The analysis of the results gives rise to an a, pp.oach for selecting a, pp.opriate growth curve models for a given set of data, prior to fitting the models, based on the characteristics of the goodness of fit test.

• 한국환경복원기술학회지
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• 제8권5호
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• pp.19-27
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• 2005

The earth is a huge magnet. All organisms live under the magnetism of earth. The magnetism influences the ions in the cells of organisms and variously functions to lives as well. The medical treatment with magnet has come down from the ancient, it has an effect on the plants' growth. But there are no scientific studies about the influences of magnetism on plant growth. Accordingly, the experiment about the influence of magnetism on several foliage plants was carried out in this study. The promotion of plants' growth led by magnetism will be the method to save the management cost of horticultural market by early shipment. As a results of this experiment, plants treated with magnets showed excellent growth especially in length growth. The experiment results of the respective plants are the following. 1. Rhapis flabelliformis : This have grown so very well in the container lined with magnets as time goes by. Showing the significant(p<0.05) differences, the length growth of Height and Length of leaves was especially distinguished. 2. Howea belmoreana : This has grown well in all containers. Showing the significant(p<0.05) differences, the length growth of Height and Length of leaves was especially distinguished. 3. Chamaedorea seifrizii : There have been the growth differences between Height and Length of leaves as time goes by. The growth of Height and Length of leaves in the container lined with magnets has been excellent. The number of leaves and number of branch generally had no big differences but the growth of Height and Length of leaves was excellent in the magnet container. The method of plant growth promotion with magnet should save the management cost for this reason. Therefore the succeeding studies about the plant growth under the influence of magnet intensity and kind must be performed. The studies with various plants are needed to activate the program for growing plants with magnet.

• 한국전기전자재료학회논문지
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• 제11권4호
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• pp.327-333
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• 1998

The influence of slow cooling and annealing time in $O_2$in MPEG process on $J_c$ was investigated. From the measurement of $J_c$,SEM and XRD, it was observed that the critical current density was related with the slow cooling time and annealing time in $O_2$. The value of $J_c$ was the highest at slow cooling time of 40 hour. And also, the value of $J_c$ along the annealing time in $O_2$in the case of the slow cooling time of 40 hours was inclined to increase with annealing time. Consequently, it can be suggested that proper slow cooling time and annealing time after slow cooling in MPMG process be important to improve the critical characteristics.

• 수산경영론집
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• 제37권3호
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• pp.109-130
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• 2006

Rapid economic development has led seafood consumption to its quality - oriented pattern as well as consumer's in China. This study concerns about The First, China is Seafood development background. The Second, China become emboldened seafood causes. The third, seafood consumption has characteristic. The fourth, seafood consumption has the organization of society. The study shows that there are economic developmental periods Chinas has three time. The First time$(1961\sim1983)$ is rapid growth. The Second time$(1984\sim1998)$ is growth accumulate. The third time$(1999\sim)$ is changing on seafood consumption as the consumption of seafood is changed according to economic variables changes in income, price, tastes and population. This changing pattern of seafood consumption is based on economic variables appears toward luxury and convenience seafoods. Consumption of food is also affected by non - economic variables. The most typical non - economic variables leading to changes of seafood consumption is local, seafood culture, $et{\ldots}$ Recently seafood consumption pattern shows that consumers paying more money to get their seafood preference for pursuing its hight growth and varienty.

• 한국세라믹학회지
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• 제49권5호
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• pp.454-460
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• 2012

The nano-sized zirconia powders were synthesized in an impregnation method using pulp and $ZrOCl_2{\cdot}8H_2O$ as an initial material. The synthesized powders were characterized by XRD and FE-SEM. The particle size of the powder was controlled by preparation conditions, such as drying temperature and time. As a result of the various drying and calcination conditions, 30~50 nm sized homogeneous zirconia particles were obtained at $800^{\circ}C$ for 1 h. Crystallization and the rapid growth of particles were accelerated with increasing calcination temperature and time. Tetragonal phase generated below $800^{\circ}C$ were transferred to monoclinic phase with increasing calcination temperature and time. Moreover, above $800^{\circ}C$, heat treatment time had very large influence on the particle growth, and the change of drying condition also had large influence on the growth of a crystal.

• 대한수학회보
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• 제60권6호
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• pp.1673-1685
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• 2023

Inspired by Hongjie Dong and Qi S. Zhang's article [3], we find that the analyticity in time for a smooth solution of the heat equation with exponential quadratic growth in the space variable can be extended to any complete noncompact Riemannian manifolds with Bakry-Émery Ricci curvature bounded below and the potential function being of at most quadratic growth. Therefore, our result holds on all gradient Ricci solitons. As a corollary, we give a necessary and sufficient condition on the solvability of the backward heat equation in a class of functions with the similar growth condition. In addition, we also consider the solution in certain L^p spaces with p ∈ [2, +∞) and prove its analyticity with respect to time.

• 한국미생물·생명공학회지
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• 제10권3호
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• pp.227-232
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• 1982

삶은 콩을 이용한 고체 배지상에서 Aspergillus oryzae의 성장 속도를 측정하는 방법에 대하여 연구하고 이들 방법을 대두와 루우핀콩 배지에서의 균 성장 특성을 비교하는데 적용하였다. 여러가지 배지 조건에서 배양 기간에 따른 균체 colony의 형성시간 크기변화, $\alpha$-아미노 질소함량의 변화, 포자형성 시간 및 균사길이의 변화등을 측정 비교하였다. 배지의 종류에 따라 Aspergillus oryzae는 특정한 균체 colony 형성시간을 나타내었으며 colony 형성후 부터는 colony 직경의 크기는 배양시간에 따라 직선적으로 증가하였다. 균체colony 직경은 배지중의 $\alpha$-아미노 질소함량과 높은 직접적인 상관관계를 나타내었으나 배지의 수분함량이 변하면 이러한 상관관계가 성립되지 않았다. 오히려 배지의 수분함량이 증가하면(60%-85%) $\alpha$-아미노 질소함량은 증가하나 colony 직경은 감소하는 역 관계를 나타내었다. 일반적으로 Aspergillus oryzae는 삶은 루우핀콩 페이스트에서 최초 성장 속도가 대두보다 발랐으며. 루우핀콩 배지에서의 colony 형성시간이 24시간인데 반해 대두에서는 44.4 시간이 걸렸다. 그러나 colony 형성이후의 성장 속도는 대두에서 더 빠르게 나타나 대두의 경우 8.83mm/day 인데 반하여 루우핀 콩에서는 7.05mm/day이었다. spore 형성 시간은 colony 형성 시간과 깊은 상관관계를 나타내었으며 일반적으로 루우핀콩에서 spore 형성 시간이 짧았다. 콩의 표면에서 균사길이를 측정하는 방법은 간단하고 빨리 균체의 성장 속도를 비교할수 있 었으며 특히 콩의 구조와 형태가 균체 성장에 미치는 영향을 조사하는데 편리하였다. 본 실 험에서는 이 방법으로 루우핀콩의 두꺼운 외피가 균체 성장을 저해하고 있음을 발견하였다.

• The Journal of Asian Finance, Economics and Business
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• 제7권12호
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• pp.73-84
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• 2020

The study aims to investigate the dual effects of corruption control on economic growth in relationship with the stock market and trade openness in developing countries. The study used difference S-GMM method on the dynamic panel data model in the period (2002-2017) with data collected from the World Bank. The study discovers the dominant impacts of corruption control in the relationship with the stock market on economic growth. At the same time, the study also confirms the overwhelming impact of corruption control in the relationship between trade openness and economic growth in the developing countries. In addition, the study shows that inefficient stock markets in developing countries will not promote economic growth. Meanwhile, the long-standing credit market has a positive impact on economic growth. With the strong development of stock market and trade openness in the period (2002-2017), control on corruption in developing countries does not get better in time with the increase in demand. The findings of this study suggest a number of solutions to strengthen corruption control, leading to the increased efficiency on the stock market and as well as encouraging the positive effects of trade openness to contribute to promoting economic growth in developing countries.