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        검색결과 22

        2.
        2023.10 구독 인증기관·개인회원 무료
        Pine Wilt Disease (PWD) is a disease causing mass deaths of pine trees in South Korea, and the dead trees serve as breeding grounds for insect vectors responsible for spreading the disease to other host trees. Because the PWD requires early monitoring to minimize its damage on domestic forestry, this study aims to develop a species distribution model for predicting the potential distribution of PWD by using artificial neural network (ANN) with time-series data. Among the architectures, the Convolutional Neural Network exhibited the highest performance, achieving a validation accuracy of 0.854 and a cross-entropy loss of 0.401, and the InceptionTime model emerged as the second-best performer. This study identified the best-performing ANN architecture for a spatiotemporal evaluation of PWD occurrence, emphasizing the importance for determining hyperparameters with ecological characteristics and data types to apply deep learning into SDMs.
        11.
        2020.03 구독 인증기관 무료, 개인회원 유료
        In Korea, where the residential environment of well-being has been especially developed, marketing using well-being brands has been actively carried out, and more recently, there has been a growing interest in the well-being brand experience and the correct understanding of consumers' perceptions and attitudes. This study was intended to reveal that the experience of well-being brands increases the attitude and confidence of brands, and consequently positively acts on the intention and loyalty of purchasing them. First of all, the well-being brand experience not only works positively on brand trust and attitude, but also raises the intention of buying again. Second, well-being brand trust is showing a positive effect on brand attitudes and intent to buy back. Third, the well-being brand attitude turned out to have a positive effect on the intention of repurchase. Unlike conventional well-being brand-related research, this study focuses on brand experience, so it provides a new understanding of well-being brand experience and consumer psychology and behavior in well-being brand marketing. Thus, adding a new perspective to existing well-being brand research, the company's perspective provides practical implications that should be considered for successful well-being marketing.
        4,000원
        14.
        2019.04 구독 인증기관·개인회원 무료
        Climate and atmospheric carbon dioxide are significant factors in ecological risk assessments, suggesting their consideration is required in predicting potential distribution of a invasive species. CLIMEX model is one of species distribution models (SDMs) and provides potential geographical distribution by focusing on climatic effect on species inhabitation. Most SDMs, such as Bioclim, Domain, GARP and MaxEnt, focus on relationship between the occurrences of the species and static environmental covariates, whereas CLIMEX model depends on limitations of species' geographical distribution and reactions to climatic variables at an appropriate temporal scale (called seasonal phenology). In this study, we described the basic concept of CLIMEX and reviewed previous applications. Also, we demonstrated the various utilization of CLIMEX differed by study purposes and methodology for analyzing the model.
        15.
        2019.04 구독 인증기관·개인회원 무료
        The red imported fire ant (Solenopsis invicta) is categorized into the world’s 100 worst invasive alien species by the International Union for Conservation of Nature. Accordingly, the prediction of potential distribution of the red imported fire ant is demanded in order to provide the possibility of dispersion into new sites, and to identify vulnerable regions to be attacked. In general, species distribution model can predict potential distribution of a specific species, but most of them have used air temperature as the most important variable. However, red imported fire ant has life cycle under ground, requiring soil temperature for more reliable prediction of potential habitats. For this reason, this study was to insert soil temperature into CLIMEX, and to evaluate potential distribution of the red imported fire ant.
        17.
        2018.10 구독 인증기관·개인회원 무료
        Oak wilt disease caused by Raffaelea quercus-mongolicae is one of the serious diseases in Korea. Infected trees showed wilting and discolourations on the cambium when the bark of a tree is peeled, since it deters moisture migration. Raffaelea quercus-mongolicae is vectored by Platypus koryoensis. In this regard, it was assumed that there might be a positive correlation between the number of gallery generated by P. koryoensis and the level of damage on the infected tree by the oak wilt disease. In order to link the occurrence of dead oak trees with the number of galleries produced by P. koryoensis, five regions (Incheon, Anyang, Gwangmyeong, Icheon and Gimhae) were selected in Korea. The number of galleries on Mongolian oaks produced by attack of P. koryoensis was counted in four directions between 50cm and 100cm from the ground level. Furthermore, Vegetation was investigated from the area where the oak wilt disease occurred, and a data logger was set up to collect data including temperature and relative humidity in each region at the elevation between 100~200m. A significant difference was observed in the number of galleries made by the insect vector between dead trees and trees infected with oak wilt disease, while no difference was observed from the vegetation on the area investigated. We will further investigate as to whether climate factors might contribute to the density and the successful invasions of the insect vector to the oak trees.
        18.
        2017.11 구독 인증기관·개인회원 무료
        Transcellular transport in epithelial cell is a method for absorbing calcium from intestine to blood, providing effective mechanism of utilizing calcium at low calcium intake. In this study, we aimed at theoretically developing a simple mechanistic model explaining transcellular transport in calcium absorption process. Transcellular calcium transport was schematized into 3 steps which were entry, diffusion, and extrusion. Each step was separately modeled to include the specific feature of them. In detail, electro-diffusion, facilitated diffusion, and Michaelis-Menten kinetics were employed to model calcium entry, diffusion, and extrusion, respectively. Then, the developed models were numerically solved to find a solution which simultaneously satisfied 3 models under steady-state assumption. Result of model simulation was consistent with the known behavior of transcellular calcium absorption, showing that transcellular calcium transport became saturated with increase of luminal calcium concentration. Because transcellular calcium transport depends on calcium binding protein mediated by vitamin D we expect that this model can be used to find optimal regulatory point for increasing calcium absorption.
        19.
        2017.10 구독 인증기관·개인회원 무료
        Prediction of the seasonal occurrence and potential distribution of agricultural pests has accomplished by software toolsimplementing species distribution models (SDMs). In this aspect, we used CLIMEX software to evaluate the seasonaloccurrence and potential distribution of Indian meal moth, Plodia interpunctella (Hübner), which is one of household mothsdamaging dried fruits in pantries. Based on the simulation, the beginning of period for suitable climate was predictedto be from mid-March to end-March, while it might be end in late October to early November. The peak time for P.interpunctella was ranged from early or mid-July to mid-August, but depended on local geography. When applying RCP8.5 climate change scenario, it was predicted that P. interpunctella would not occur due to intensive rainfall in July andAugust in 2060.
        20.
        2017.10 구독 인증기관·개인회원 무료
        우제류는 소, 돼지, 사슴, 멧돼지, 고라니, 노루 등이 포함 되어 있는 동물군 중 하나이다. 국내에서는 우제류 일부 종 이 주요 가축으로 사육되고 있으며, 최근에는 야생종에 의 한 로드킬, 농작물 피해 등의 급증으로 사회적 관심을 받고 있는 주요 생물군이다. 그러나 증가하는 사회적 관심에도 불구하고, 우제류 관련 국내 연구 동향 분석 사례는 매우 부족한 실정이다. 본 연구는 국내외 우제류 관련 연구 동향 을 파악하고 비교함으로써 향후 국내 우제류 연구 및 정책 수립을 위한 기초자료를 제공하는 것을 목적으로 한다. 분 석을 위한 연구 논문 수집에 앞서, 생물 종 목록과 연구 자료들을 참고하여 한국과 일본 내 분포하는 우제류 종들을 파악하였으며, 각각 7종(고라니, 꽃사슴, 노루, 말사슴, 멧돼 지, 사향노루, 산양)과 3종(꽃사슴, 멧돼지, 일본산양)이 서 식하는 것을 확인하였다. 이후 Web of science의 Science Citation Index Expanded database에서 각 국가 내 서식하 는 종들의 학명과 국가의 영명을 검색어로 하여 논문들을 검색하였다. 검색 결과, 한국 96편, 일본 422편으로 총 518 편의 논문들이 검색되었다. 이후 검색된 논문들의 제목과 초록 내 단어들에 대한 동시출현분석을 실시하였다. 분석 결과, 10회 이상 동시 출현하는 단어들은 135개 추출되었으 며, 단어들의 동시출현횟수에 따른 연관 관계에 의해 3개의 cluster들이 형성되었다. 각 cluster에 포함된 추출 단어들을 살펴본 결과, cluster_1은 “서식 특성/생태적 영향”, cluster_2는 “질병”, cluster_3 “유전 특성/개체군유전구조” 와 관련된 단어들 위주로 구성된 것으로 파악되었다. 국가 별로 각 cluster에 연관된 논문 비율을 살펴본 결과, 한국은 cluster_2 53.8%(43편), cluster_3 41.3%(33편), cluster_1 5.0%(4편) 순이었으며, 일본은 cluster_1 51.2%(200편), cluster_2 27.6%(108편), cluster_3 21.2%(83편) 순이었다. 각 cluster에 속한 연평균 발행 논문 수를 살펴본 결과, 한국 은 cluster_2의 논문 수가 연평균 2.5편으로 가장 많았으며, 일본은 cluster_1이 연평균 7.4편으로 가장 많았다. 전체 논 문 비율과 연평균 논문 수에서 한국은 cluster_2의 논문이 많아 “질병”과 관련된 주제 위주로 연구가 이루어지는 반 면, 일본은 cluster_1에 해당하는 “서식 특성/생태적 영향” 과 관련된 주제의 연구가 주로 이루어지는 것으로 판단된 다. 한국과 일본 모두 우제류의 생태적 영향과 관리가 중요 한 화두임에도 불구하고, 기초 연구로써 중요한 “서식 특성/ 생태적 영향”에 대한 연구에 있어서 한국은 일본에 비해 그 수가 적은 것으로 보인다. 향후 다양한 매체를 활용한 자료 수집과 비교 대상 국가를 추가한 후속 연구를 진행하 여 우제류 연구의 세계적인 추세를 파악하고 국내 적용 가 능 사례에 대해 모색해 보고자 한다.
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