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서식지 선호도 및 품질 평가 모형의 신뢰성 개선: 한국 고라니의 경우
정지향,김성수 한국신뢰성학회 2022 신뢰성응용연구 Vol.22 No.1
Purpose: Predicting the occurrence of wild species at the landscape level is a crucial task for environmental managers and conservation biologists. Modeling and evaluating wildlife habitat quality based on the Geographic Information Systems (GIS) technique provides new opportunities for enhancing model predictability. Methods: We developed a GIS-based habitat suitability index (HSI) model for Korean water deer (Hydropotes inermis argyropus) in Chungnam province, Korea, where they are a significant cause of damage to vegetables and crops. The model was based primarily on logistic regression analysis and was used to assess the impact of multiple variables, such as landscape patterns and structures, topographic characteristics, and human disturbance, on habitat suitability for the species. After developing the model, we employed it to produce a habitat-suitability map. Results: The HSI model yielded a p-value of 0.339 (χ² = 9.033) and a 74.0% correct prediction rate for the overall predicted data. The model also demonstrated that 42.4% of the province is covered in poor-quality habitat, while Korean water deer prefer fair-quality habitats (mean HSI = 0.50). In addition, the observation probability increased when HSI values rose, meaning that the model has good predictive power. Conclusion: Associations between landscape patterns and habitat requirements could be utilized to build accurate, easy-to-apply, predictive models for the habitats of wild species. The HSI model and habitat-suitability map provide solid foundations on which to build effective wildlife management and Agri-Environment policies with local governments to conserve endangered species.
오지향,김고운,최성혜,정지향,나해리,김정은,나덕렬,홍창희,김은주 대한치매학회 2014 Dementia and Neurocognitive Disorders Vol.13 No.4
Background: Cognitive intervention (CI) is a nonpharmacological approach used to compensate for cognitive impairment. It is categorized into cognitive training, cognitive stimulation and cognitive rehabilitation. Several studies showed that CI could induce cognitive enhancement and reduction of risk for future cognitive decline in patients with brain injury. We investigated effects of CI on cognitive functions and brain glucose metabolism based on serial cognitive assessments and [18F]-Fluorodexoxyglucose positron emission tomography (FDG-PET) in a patient with carbon monoxide (CO) intoxication. Methods: A 40-year-old man presented with memory impairment and abnormal behaviors such as apathy, indifference, and perseveration 2-month after CO intoxication. Brain magnetic resonance image (MRI) demonstrated high signal changes in the bilateral basal ganglia, hippocampus and the subcortical white matter on T2 weighted images. FDG-PET also showed glucose hypometabolism in the bilateral hippocampus, basal ganglia, and the subcortical white matter. A detailed neuropsychological evaluation revealed multiple cognitive impairments in memory, language and frontal functions. He received twice a week sessions of 60-minute group-based cognitive intervention for 12 weeks. Several neuropsychological examinations and FDG-PETs were conducted at baseline and after CI. Results: After CI, he showed improvements in memory and frontal functions compared with baseline performances. These cognitive improvements persisted by the 7-month follow-up. The extent of glucose hypometabolism was decreased 1-month after CI, however increased 8-month after CI. Conclusions: This case study suggested that CI could enhance cognitive functions and improve glucose metabolism in a patient with CO intoxication. Also, the effects of CI on cognitive functions seem to be last at least 7-month after training.