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본 연구는 강원도 평창군 가리왕산 일대의 천연 활엽수림을 대상으로 작업방법별 시업 전과 시업 후의 임분다양성 변화를 평가하여 산림생태계 경영에 필요한 정보를 제공하고자 수행하였다. 이를 위해 각 작업방법별로 30 m× 30 m(0.09 ha) 크기의 고정표본점을 3반복으로 설치하고 시업 전과 시업 후의 정밀 임분조사를 실시하였다. 이 자료에 근거하여 임분다양성 지수인 집락도, 흉고직경 변이지수, 수고 변이지수, 그리고 혼효지수와 관련된 2개씩의 지수, 총 8가지 지수를 추정한 후, 3가지 작업방법에 대한 시업 전과 시업 후의 임분다양성 변화를 평가하였다. 본 연구에서는 시업 전후의 임분다양성 변화에 대한 통계검정을 위해 Duncan의 다중검정과 t-검정을 실시하였다. 임분다양성 지수를 분석한 결과 작업방법에 관계없이 시업을 통해 임분구조가 개선된 것으로 평가되었다. 또한 시업 전과시업 후의 임분다양성 지수는 통계적인 차이를 보여 각 작업방법별 임분의 공간 구조는 시업을 통해 개선된 것을확인할 수 있었다. This study was conducted to estimate the changes of stand diversity before and after applying threedifferent silvicultural treatments such as selection cutting system, two-storied system, and shelterwood system. Data were collected in the natural deciduous forests in Pyungchang of Gangwon Province, Korea. Ninepermanent sampling plots of 0.09 ha were established in the forests and the each of silvicultural treatments wasapplied to three sampling plots, respectively. Some tree variables were measured in each stand before and afterthe silvicultural treatments were applied. With these data, stand attributes were estimated in each stand beforeand after the silvicultural treatments. In this study, two different indices related to each of stand diversity indicessuch as contagion, DBH-difference, height-difference, and mingling were estimated and compared to analyze thedifferences of stand diversity among the stands before and after silvicultural treatments. As a result, total eightstand diversity indices were used to analyze the differences among structures of stands managed by three differentsilvicultural treatments. Duncan``s multiple range test and t-test were then employed to statistically analyze thedifference of stand diversity among the stands. The results revealed that stand structures seem to be improved afterapplying the silvicultural treatments. There are significant differences in the stand diversity indices between beforeand after silvicultural treatments for each stand. According to the evaluation of stand diversity indices, it wasconfirmed that spatial structure of the stands was improved by applying the silvicultural treatments.
본 연구는 강원도 평창지역의 천연 활엽수림을 대상으로 임분구조 조정에 의한 이단림 조성 방안을 제시하고자 하였다. 이를 위해 이단림 시범지를 선정한 후 30 m×30 m의 고정표본점을 3반복으로 설치하고 정밀 임분조사를 실시하였다. 임분조사 자료에 근거하여 이단림 시범지의 시업전 임분통계량과 임분구조를 추정하고, 이단작업의 특성에 맞는 시업방안에 따라 시업후의 임분통계량과 임분구조의 변화를 시뮬레이션 기법을 통해 예측하였다. 시업전의 임분 현황을 분석한 결과 목표임분형으로 유도하기 위해서는 임분구조의 조정이 필요한 것으로 확인되었다. 시뮬레이션 기법을 통해 예측한 시업후의 임분 현황을 보면 시업후에도 목표임분형을 달성하기 위해서는 상당한 시간이 필요한 것으로 평가되었다. 시업후 상층목의 임목본수는 ha당 170본으로 이단림의 기준에 부합되는 것으로 평가되었다. 하지만 하층의 임목본수는 이단림의 기준과 상당한 차이를 보이고 있는데, 교목치수의 진계를 통해 어느 정도 보완할 수 있을 것으로 판단되지만 수하식재를 고려할 필요가 있다. 시업후의 임분 현황을 고려하면 이단림 상층목의 목표 임목축적은 ha당 150 m3가 적합한 것으로 평가되었으며, 이를 달성하려면 20년 정도가 소요되는 것으로 예측되었다. 이단림 조성을 위해서는 앞으로 5년 간격의 임분조사를 통해 시간 경과에 따른 임분구조의 변화를 파악하고, 필요할 경우 이단림 유도를 위한 추가적인 조치가 요구된다. This study was conducted to provide a method of establishing two-storied forests by the adjustment of stand structures in natural deciduous forests of Pyeongchang area. Three permanent sampling plots of 0.09 ha were established in study site and some tree variables were measured in each sampling plot before the treatment of two-storied system. Stand attributes and stand structures before treatment were estimated based on the data measured in sampling plots. The results indicate that the current stand status is different from typical stand structures of two-storied forests. A simulation technique was applied to predict stand attributes and stand structures after the treatment of two-storied system. Results suggest that significant time is required to accomplish target stand structures even after applying the treatment of two-storied system. Number of trees in the upper canopy class after treatment was predicted to be 170 trees/ha, which adequately meets the target of two-storied forests. It was predicted, however, that the lower canopy class trees has much less trees compared with the typical stand structures of two-storied forests. This problem could be solved with ingrowth of infant trees over time or by under-planting of tolerant species. It is confirmed that the target growing stock volumes of the upper canopy class should be approximately 150 m3/ha considering stand status after treatment. It is predicted that twenty years of conversion period is required to accomplish this goal. The changes in stand structures over time should be assessed based on stand inventory carried out every five years, and additional treatments for inducing two-storied forests should be applied if necessary.
'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.
It is frequent that the redevelopment project which is being promoted is delayed or the project itself is stopped due to the decline of the business due to the social phenomenon such as the deterioration of the manufacturing industry which plays a pivotal role of the economy, the deterioration of the construction market, the recession of the pre-sale market, low growth, low birth rate and aging. Redevelopment projects should emphasize resident consensus and cooperation above all. The high participation rate of union members is a driving force to speed up the project. However, since the private capital input and the business are composed of the residents, the unilateral project that lacks expertise, opaque business process, There is a constant conflict between the interests of business stakeholders due to sharp confrontation due to the unilateral designation of self-governing districts, excessive donation delinquency, frequent policy changes and regulations of government or administrative offices. As a result of the statistical test of this study, if the conflict is revealed in the first stage planning stage, the conflicts in the third stage execution phase become bigger and the overall conflict becomes bigger. This resulted in the delay of the redevelopment project, which in turn led to a deterioration in the profitability of the redevelopment project. The implications of this study are as follows. In this study, it is meaningful to identify conflicts through statistical verification and to suggest ways to improve such conflicts. In addition, it can be understood that the first stage of planning conflict and the third stage of conflict phase have the greatest impact on the overall conflict, and concrete solutions can be suggested by examining the causes of such conflicts. Lastly, it will be a great help to recognize the conflicts in the stages of the redevelopment project in Changwon City and prepare for the redevelopment project.
CCS (Carbon Dioxide Capture and Storage) is considered as the most effective counterplan in the mitigation of climate change. Even though the risk of leakage of CO2 stored in the geologic formation is very low, the public is expected to disagree with the initiation of a CCS project without proper management plans ensuring the safety. In this study, recognition of laypeople were surveyed about CCS, climate change, characteristics of carbon dioxide, storage concepts, ground pressure, the impact of carbon dioxide, and carbon dioxide for leakage. Thereafter the factors that could affect to recognition of CCS were analyzed by regression analysis. A survey was carried out to find out the public understanding and awareness about climate change and CCS. It is the purpose of this study to propose appropriate risk management strategies based on the findings from the survey.
'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.
The purpose of this research is to examine the development risk factors through the step-by-step approach of urban development projects by project method, focusing on Pyeongtaek area. In the comparison by business method, the risk of only the exchange method is caused by problems in demand and supply that do not judge the business disruption and interest rate policy due to zoning without thorough feasibility review, and instability of the development project due to tax fluctuation, developer financial company, construction It was considered to be a signing of an agreement with and against adverse conditions. In other words, because the project implementer conducts the project without purchasing land according to the characteristics of the replotting method, it is because the zoning and cooperation with the business agency, financial company, and contractor are judged to be important. In addition, the risks of the adoption and use method are due to the inability to permit or delay due to the lack of review of the upper plan and the upper regulations, and the delay in the development business due to the lack of liquidity due to the loan regulation of the pre-sale due to the financial policy after the sale, and the wrong construction contract. saw. This is because the project operator takes a lot of funds in the early stages as a method of negotiation purchase or acceptance, and thus, when the project is prolonged due to incapacity or delay in licensing, changes in financial policy, and lack of liquidity, the effect of the risk factor is greatly affected. Because. Lastly, it was considered that the risk of mixed-use only was business disruption due to cancellation of designation due to incorrect designation and unforeseen unsold sale. In other words, because the business is conducted by classifying the installation cost of each infrastructure by designating it as a replotting method and a receiving method, many complaints are generated during the process, and if the project is canceled or delayed for a long time, the risk factor is greatly affected. Because it appears.
본 연구는 환경인자를 이용하여 우리나라에 생태권 역별로 분포하는 중부지방소나무의 지위지수 추정식을 개발하고 기후변화 시나리오를 적용하여 적지면적 및 적지분포를 추정하기 위해 수행하였다. 이를 위해 산림입지도와 전자기후도 및 기후변화 시나리오 RCP 4.5와 RCP 8.5를 사용하여 산림생산력에 영향을 미칠것으로 판단되는 19개의 기후변수를 포함한 총 48개 환경인자를 도출한 후, 최적 조합에 의해 지위지수 추정식을 개발하였다. 최종 생태권역별 중부지방소나무의 지위지수 추정식에는 각각 5~7개의 환경인자가 독립변수로 사용되었고, 지위지수 추정식의 설명력을 나타내는 결정계수는 0.32~0.46의 범위에 있는 것으로 분석되었다. 이 추정식은 모형의 평균편의, 정도, 표준 오차의 3가지 평가통계량에 근거하여 검증을 실시한 결과 비교적 지위 추정능력이 높은 것으로 판명되었다. 또한 본 연구에서는 생태권역별 중부지방소나무의 지위지수 추정식과 기후변화 시나리오 RCP 4.5와 RCP 8.5를 연계하여 시간 경과에 따른 중부지방소나무의 연도별 적지면적 및 적지분포의 변화를 추정하였다. This study was conducted to predict the changes of yearly productive area distribution for pinus densiflora under climate change scenario. For this, site index equations by ecoprovinces were first developed using environmental factors. Using the large data set from both a digital forest site map and a climatic map, a total of 48 environmental factors including 19 climatic variables were regressed on site index to develop site index equations. Two climate change scenarios, RCP 4.5 and RCP 8.5, were then applied to the developed site index equations and the distribution of productive areas for pinus densiflora were predicted from 2020 to 2100 years in 10-year intervals. The results from this study show that the distribution of productive areas for pinus densiflora generally decreases as time passes. It was also found that the productive area distribution of Pinus densiflora is different over time under two climate change scenarios. The RCP 8.5 which is more extreme climate change scenario showed much more decreased distribution of productive areas than the RCP 4.5. It is expected that the study results on the amount and distribution of productive areas over time for pinus densiflora under climate change scenarios could provide valuable information necessary for the policies of suitable species on a site.
'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.
This study aims to find risk factors of urban development projects in the center of Pyeongtaek. We will analyze each step, attribute, factor, risk importance and priority using statistical techniques of AHP analysis. The existing studies of urban development projects are limited to problem analysis and revitalization measures of urban development projects, so there are few studies on risk factors of urban development projects. The purpose of this study is to suggest the optimal management plan based on the derived risk factors and importance analysis. This study classifies the development stages into large, medium, and small to determine the relative importance of risk factors in each stage of urban development projects and determines the relative importance using AHP (Analytic Hierarchy Process) analysis. The results of the analysis show that the compound weights are the basis for judging item priority of the relative importance of the stage risk factors for urban development projects. Among the 48 items, the weighted analysis results show that the top 10 of the 48 items require attention for risk management in the urban development project. Therefore, intensive management is required for careful analysis. In particular, in this study, the preliminary feasibility analysis stage and the market environment analysis stage are important in the pre-development evaluation stage, the site acquisition stage is important in the development preparation stage, and the negotiation and contract conclusion stage are important in the development stage.