• 농촌계획
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• 제25권3호
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• pp.129-139
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• 2019

The purpose of this study is to monitor the long-term vegetation change of the village complementary forest after restoration. Based on the monitoring in 2010, six years after the restoration project in 2004, the monitoring of the complementary forest in Dubang village in 2019 after 9 years was conducted. This study identifies the change of species diversity and structure, growth, vegetation coverage, structural quality etc. and succession through long-term monitoring. For this, field survey was conducted in 2003 and 2010, 2019. The results demonstrate significant increase of species diversity and multi-layer structure and progress of natural succession. Overall, Part I is considered to be a quasi-natural complementary village forest, which has a natural balance between natural vegetation that have remained in nature for a long time and anthropogenic vegetation, revealing the coexistence of nature and humanity. It means ecological structure and function have improved. Part II should be restored to the lost part and adaptive management rather than excessive management should be carried out to leave natural succession.

• 한국콘텐츠학회논문지
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• 제19권10호
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• pp.315-324
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• 2019

본 연구는 기업 구성원의 장기지향성이 변화 조직시민행동에 미치는 영향 및 감성활용의 매개효과를 살펴보았다. 홉스테드 연구에 의하면 동아시아국가 중 한국은 장기 지향성이 높은 국가로 나타났으며, 절약, 장기적 관계 및 소속된 집단의 화평을 중요하는 문화라고 볼 수 있다. 이와 관련 선행 연구들은 학교 및 국가별 차원에서 연구되었으며, 개인차원의 자발적 역량인 변화 조직시민행동에 미치는 영향을 검증한 연구는 많지 않다. 또한 글로벌 환경의 급격한 변화에 노출된 구성원들의 감성활용 능력은 조직의 구성원으론 매우 중요한 개인 역량으로 평가된다. 이런 현상을 바탕으로 본 연구는 대기업의 구성원들의 감성 활용 능력이 장기지향성과 변화 조직시민행동을 매개 할 것이라 예측했다. 본 연구는 홉스테드 문화차원을 개인적 차원으로 설문화한 Yoo's Cultural Value Scale (CVSCALE) 사용하여 통계프로그램인 SPSS 21.0을 통해 국내 S전자회사의 임직원 200명을 상대로 설문 및 분석했으며 결과는 다음과 같다. 장기지향성은 변화적 조직시민행동에 유의한 (+) 영향을 미친다고 나타났으며 개인의 감성활용이 장기지향성과 변화 조직시민행동을 완전 매개한다는 결과가 나타났다. 본 연구 결과를 통해 감성활용이 기업의 구성원의 변화 조직시민행동에 긍정적 영향을 준다는 점을 검증하였으며 구성원들의 감성 활용 훈련 및 교육을 통해 조직효율성을 높이고 자발적 행동역량인 변화적 조직시민행동도 높일 수 있다는 가능성을 제시한 점에 의미가 있다.

• Fisheries and Aquatic Sciences
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• 제26권11호
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• pp.639-648
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• 2023

The sea surface temperature (SST) and ocean heat content in the Korea Waters are gradually increased. Especially the increasing trend of annual mean SST in the Korea Water is higher about 2.6 times than the global mean during past 55 years (1968-2022). Before 2010s, the increasing trend of SST was led by winter season in the Korea Waters. However, this pattern was clearly changed after 2010s. The increasing trend of SST during summer is higher about 3.9 times than during winter after 2010s. We examine the long-term variations of several ocean and climate factors to understand the reasons for the long-term pattern changes of SST between summer and winter in recent. Tsushima warm current was significantly strengthened in summer compare to winter during past 33 years (1986-2018). The long-term patterns of Siberian High and East Asian Winter Monsoon were definitely changed before and after early- or mid-2000s. The intensities of those two climate factors was changed to the increasing trend or weakened decreasing trend from the distinctive decreasing trend. In addition, the extreme weather condition like the heatwave days and cold spell days in the Korea significantly increased since mid- or late-2000s. From these results, we can consider that the occurrences of frequent and intensified marine heatwaves during summer and marine cold spells during winter in the Korea Waters might be related with the long-term pattern change of SST, which should be caused by the long-term change of climate factors and advection heat, in a few decade.

• 디지털융복합연구
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• 제19권3호
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• pp.127-135
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• 2021

본 연구에서는 사옥신축목적의 시설투자 공시기업을 대상으로 내부관계자의 거래행태에 따른 차별적 장기성과를 살펴봄으로써 자본시장의 정보비대칭 현상을 분석하고 있다. 이를 위해 한국거래소 유가증권과 코스닥시장에서 투자공시가 이루어진 기업을 대상으로 사건연구방법과 다중회귀분석을 활용하여 분석하였다. 연구결과 사옥신축 기업의 장기주가수익률은 평균적으로 양(+)의 유의한 값을 나타내고 있다. 공시 전후의 내부관계자 지분변화에 따라 차별적 장기성과가 나타나고 있으며, 회귀분석결과 내부관계자지분, 소액개인투자자의 지분변화는 각각 장기성과와 통계적으로 유의한 양(+)과 음(-)의 상관관계가 있음을 확인하였다. 이는 내부관계자가 경영자의 사적 의도에 대한 진위 여부 및 사옥신축이 기업에 미치는 영향을 판단할 수 있는 정보우위의 위치에 있음을 뒷받침해 줄 수 있는 연구결과로 풀이되며 지분변화요인이 사옥신축 기업에 대한 장기성과의 예측요인으로 활용될 수 있다는 측면에서 자본시장의 투자자들에게 실무적으로 유용한 정보를 제공해 줄 수 있을 것으로 기대된다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2021년도 춘계학술대회
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• pp.38-38
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• 2021

The seeds of rice with variable status were examined the germination rate after 10 years of long-term storage (-18℃) conservation. For seeds of wild relatives, 2 accessions were examined and germination rate of all accessions showed no changed after freezing conservation. For seeds of native germplasm, 1,259 accessions were examined and germination rate of 696 accessions was increased or showed no change after 10 years of long-term storage. Germination rate of 432 accessions was decreased with below 15% of initial germination rate. For 79 accessions of native germplasm, germination rate of seeds was decreased with above 15% of initial germination rate after 10 years of long-term storage, which is needed to be rejuvenated. For seeds of developed varieties, 873 accessions were examined and germination rate of 486 accessions of developed varieties was increased or showed no change after 10 years of long-term storage. Germination rate of 251 accessions was decreased with below 15% of initial germination rate. For 25 accessions of developed varieties, germination rate of seeds was decreased with above 15% of initial germination rate after 10 years of long-term storage, which is needed to be rejuvenated. For seeds of developed line, 2,131 accessions were examined and germination rate of 1,245 accessions of developed line was increased or showed no change after 10 years of long-term storage. Germination rate of 588 accessions was decreased with below 15% of initial germination rate. For 96 accessions, germination rate of seeds was decreased with above 15% of initial germination rate, which is needed to be rejuvenated.

• 한국수자원학회논문집
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• 제48권9호
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• pp.743-756
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• 2015

효과적인 하천관리를 위해서는 준설과 각종 수리구조물의 영향에 의한 하상변화 양상을 파악하고 평가하는 것이 필수적이다. 특히 대규모 준설과 대형수리구조물의 건설은 본류뿐만 아니라 지류의 하상안정에도 영향을 미칠 수 있다. 본 연구에서는 금호강이 유입하는 낙동강 강정고령보~달성보 구간에 대해 하도준설과 보 건설 및 운영에 따른 본류와 지류에서의 장기하상변동 영향을 살펴보고자 하였다. HEC-6모형을 이용하여 유사이송 및 장기하상변동 양상을 모의하였으며, 그 결과 준설 및 보 운영으로 인해 본류뿐만 아니라 지류에서도 하상변화량이 증가하고 가속화되었다.

• 생약학회지
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• 제44권2호
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• pp.200-208
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• 2013

The aim of this study was to evaluate the shelf-life of Bojungikgi-tang (Buzhongyiqi-tang in Chinese) by long-term storage test. Experiments were performed to evaluate the stability such as the selected physicochemical, pH, identification, heavy metal, microbiological experiment, and amount of marker compounds under a long-term storage test of Bojungikgi-tang decoction. The significant change was not showed in pH, heavy metal, microbiological, and identification test based on long-term storage test. Furthermore, the HPLC analysis was performed for the determinations of liquiritin, glycyrrhizin, nodakenin, and hesperidin in Bojungikgi-tang by long-term storage test. We were calculated shelf-life of Bojungikgi-tang decoction based on the amount change of four constituents. Consequently, Shelf-life by four compounds at room temperature was predicted 23 month. The suggested shelf-life would be helpful on the storage and distribution of herbal medicine.

• 보건의료산업학회지
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• 제8권1호
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• pp.51-64
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• 2014

The purpose of this study was to investigate the relationship among staffing, occupancy rate, upward level change of long-term care need, and evaluation grade of facility. Data were obtained from National Health Insurance Corporation Database. Occupancy rate and evaluation grade were highest in National/public operating facilities, while they were worst in individual operating facilities. The percents of A or B grade in evaluation grade (by newly enforced law) is highest in National/public operating facilities. Multiple regression analysis showed that upward level change of care needs was very weakly associated with the number of doctors. Evaluation grade showed a weak and significant association with occupancy ratey(by old-version law)(r=.20, p<.01), upward level change of care need in group home(r=.23, p<.01) Staffing in facility did not show significantly consistent association with upward level change of care needs, evaluation grade, and occupancy rate.

• 한국수소및신에너지학회논문집
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• 제29권1호
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• pp.117-123
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• 2018

The long-term perception investigation of environment is needed for the persistence of each country's policy on climate change, which is greatly influenced by external factors. Long term data on perception and attitudes of people's thought can be a big data point for climate change and consistent policies can be implemented with the need for public demand. Information on the perception of the general public regarding the environment should be carried out as a basis for the national environmental policy.

• 산경연구논집
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• 제11권3호
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• pp.39-50
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• 2020

Purpose: Agriculture, which is heavily influenced by climate conditions, is one of the industries most affected by climate change. In this respect, various studies on the impact of climate change on the agricultural market have been conducted. Since climate change is a long-term phenomenon for more than a decade, long-term projections of agricultural prices as well as climate variables are needed to properly analyze the impact of climate change on the agricultural market. However, these long-term price projections are often major constraints on studies of climate changes. The purpose of this study is to analyze the impacts of climate changes on the Korean onion market using ex-post analysis approach in order to avoid the difficulties of long-term price projections. Research design, data and methodology: This study develops an annual dynamic partial equilibrium model of Korean onion market. The behavioral equations of the model were estimated by OLS based on the annual data from 1988 to 2018. The modelling system is first simulated to have actual onion market conditions from 2014 to 2018 as a baseline and then compared it to the scenario assuming the climatic conditions under RCP8.5 over the same period. Scenario analyses were simulated by both comparative static and dynamic approach to evaluate the differences between the two approaches. Results: According to the empirical results, if the climate conditions under RCP8.5 were applied from 2014 to 2018, the yield of onion would increase by about 4%, and the price of onion would decrease from 3.7% to 17.4%. In addition, the average price fluctuation rate over the five years under RCP8.5 climate conditions is 56%, which is more volatile than 46% under actual climate conditions. Empirical results also show that the price decreases have been alleviated in dynamic model compared with comparative static model. Conclusions: Empirical results show that climate change is expected to increase onion yields and reduce onion prices. Therefore, the appropriate countermeasures against climate change in Korean onion market should be found in the stabilization of supply and demand for price stabilization rather than technical aspects such as the development of new varieties to increase productivity.