14,688 research outputs found
P'ungsu: A Study of Geomancy in Korea
No full textThis book is a milestone in the history of academic research on the development and role of geomancy (fengshui in Chinese and p'ungsu in Korea) in Korean culture. As the first interdisciplinary work of its kind, it investigates many topics in geomancy studies and contains contributions from a number of disciplines including geography, historical studies, environmental management, architecture, landscape architecture, religious studies and psychoanalysis. Hong-key Yoon, the editor of this book authored 9 chapters of 17 chapters in total
Pericyte Loss Leads to Capillary Stalling Through Increased Leukocyte-Endothelial Cell Interaction in the Brain
No full textCopyright © 2022 Choe, Yoon, Joo, Kim, Hong, Koh, Lee, Oh and Jeong.The neurovascular unit is a functional unit composed of neurons, glial cells, pericytes, and endothelial cells which sustain brain activity. While pericyte is a key component of the neurovascular unit, its role in cerebral blood flow regulation remains elusive. Recently, capillary stalling, which means the transient interruption of microcirculation in capillaries, has been shown to have an outsized impact on microcirculatory changes in several neurological diseases. In this study, we investigated capillary stalling and its possible causes, such as the cerebral endothelial glycocalyx and leukocyte adhesion molecules after depleting pericytes postnatally in mice. Moreover, we investigated hypoxia and gliosis as consequences of capillary stalling. Although there were no differences in the capillary structure and RBC flow, longitudinal optical coherence tomography angiography showed an increased number of stalled segments in capillaries after pericyte loss. Furthermore, the extent of the cerebral endothelial glycocalyx was decreased with increased expression of leukocyte adhesion molecules, suggesting enhanced interaction between leukocytes and endothelial cells. Finally, pericyte loss induced cerebral hypoxia and gliosis. Cumulatively, the results suggest that pericyte loss induces capillary stalling through increased interaction between leukocytes and endothelial cells in the brain.11Nsciescopu
Fig. 1. Zabelia densipila M.-P. Hong, Y.-C. Kim & B.Y. Lee. A. Habit. B. Inflorescence. C. Fruit. Drawn from the holotype and isotype M.-P. Hong and Y.-C. Kim 2K9-00181 in A new species of Zabelia (Linnaeaceae) from Korea
No full textFig. 1. Zabelia densipila M.-P. Hong, Y.-C. Kim & B.Y. Lee. A. Habit. B. Inflorescence. C. Fruit. Drawn from the holotype and isotype M.-P. Hong and Y.-C. Kim 2K9-00181 (KB).Published as part of Hong, Moon-Pyo, Kim, Young-Chul, Nam, Gi-Heum & Lee, Byoung Yoon, 2012, A new species of Zabelia (Linnaeaceae) from Korea, pp. 1-3 in Journal of Species Research 1 (1) on page 2, DOI: 10.12651/JSR.2012.1.1.001, http://zenodo.org/record/811995
Biotrickling Filtration for the Reduction of N<sub>2</sub>O Emitted during Wastewater Treatment: Results from a Long-Term In Situ Pilot-Scale Testing
No full textWastewater treatment plants (WWTPs) are a major source of N2O, a potent greenhouse gas with 300 times higher global warming potential than CO2. Several approaches have been proposed for mitigation of N2O emissions from WWTPs and have shown promising yet only site-specific results. Here, self-sustaining biotrickling filtration, an end-of-the-pipe treatment technology, was tested in situ at a full-scale WWTP under realistic operational conditions. Temporally varying untreated wastewater was used as trickling medium, and no temperature control was applied. The off-gas from the covered WWTP aerated section was conveyed through the pilot-scale reactor, and an average removal efficiency of 57.9 ± 29.1% was achieved during 165 days of operation despite the generally low and largely fluctuating influent N2O concentrations (ranging between 4.8 and 96.4 ppmv). For the following 60-day period, the continuously operated reactor system removed 43.0 ± 21.2% of the periodically augmented N2O, exhibiting elimination capacities as high as 5.25 g N2O m-3·h-1. Additionally, the bench-scale experiments performed abreast corroborated the resilience of the system to short-term N2O starvations. Our results corroborate the feasibility of biotrickling filtration for mitigating N2O emitted from WWTPs and demonstrate its robustness toward suboptimal field operating conditions and N2O starvation, as also supported by analyses of the microbial compositions and nosZ gene profiles.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Sanitary Engineerin
Photis bronca Jung, Coleman and Yoon 2019
No full text62. Photis bronca Jung, Coleman and Yoon, 2019 ūήėÑ형꼬NµNầNjạ (Fig. 13F) Material examined. 1 ind., Southern end of Hachujado, 26 August 2021; 1 ind., Chuja Bridge, 27 August 2021; 2 inds., Damuraemi Island, 27 August 2021. Distribution. Korea (Jejudo Island and south coast).Published as part of Kim, Kyung-Won, Zhang, Xin, Choi, Jae-Hong, Kim, Jun & Kim, So-Yeon Shin and Young-Hyo, 2023, Amphipods (Crustacea: Malacostraca) fauna from Chujado Island in Korea, pp. 1-26 in Journal of Species Research 12 (1) on page 14, DOI: 10.12651/JSR.2023.12.1.001, http://zenodo.org/record/812010
Supplemental material for The 100 top-cited articles focused on magnetic resonance: a bibliometric analysis
No full textSupplemental material for The 100 top-cited articles focused on magnetic resonance: a bibliometric analysis by Soo Jeong Yoon, Dae Young Yoon, Kyoung Ja Lim, Ji Yoon Moon, Su Jin Hong, Sora Baek and Eun Joo Yun in Acta Radiologica</p
Effect of Long-Term Benzodiazepines for Chronic Insomnia on Cognitive Function and Waking Electroencephalography: A Case-Control Study
No full textOBJECTIVE: The relationship between benzodiazepine use and cognitive decline in insomnia patients has been reported, but still conflicting. Thus, we tried to determine whether long-term exposure of benzodiazepine might be associated with changes of cognition and electroencephalography (EEG) findings in patients with chronic insomnia. METHODS: Insomniacs using benzodiazepines (n=29), drug-free insomniacs (n=27), and age- and sex-matched controls (n=28) were recruited. Neurocognitive function tested with Korean version of the Consortium to Establish a Registry for Alzheimer’s Disease Assessment Packet Neuropsychological Assessment Battery, quantitative EEG in awake state, and information of benzodiazepine usage were obtained. RESULTS: Drug-free insomniacs reported more severe symptoms than insomniacs using benzodiazepine (p<0.001). Insomniacs using benzodiazepine showed a decrease of executive function in Trail Making Test A than drug-free insomniacs and controls (0.73±0.66 vs. 1.27±0.38 vs. 1.09±0.47, p<0.001) and in categorical fluency than drug-free insomniacs (-0.01±0.99 vs. 1.26±0.97, p=0.002). However, such decrease of executive function was not proportional to daily dose or cumulative dose of benzodiazepine. The EEG was not significantly different between insomniacs using benzodiazepine and drug-free insomniacs, while EEG of insomniacs showed low relative theta power in frontal and parietal regions but high relative beta power in frontal region than that of controls. CONCLUSION: Benzodiazepine users with chronic insomnia showed an impairment of executive function compared to drug-free insomniacs and controls although they showed relatively decreased severity of insomnia symptoms. Chronic insomniacs showed a hyper-arousal manifestation in front-parietal region of brain regardless of benzodiazepine exposure
International students in teacher training : South Korean liberal studies students in Hong Kong
No full textSince the globalization era, internationalization in higher education became inevitable. This allowed education students to partake in teacher training programs from all across the world, inducing an increase in teacher mobility. Although non-local education students are exposed to the same coursework as their local counterparts, progress in their teacher training differ from that of local students, as their learning experiences are significantly affected by cultural differences.
This research implements a narrative inquiry approach, exploring the realities of teacher training experiences of South Korean Liberal Studies students in Hong Kong. Challenges faced by these non-local student teachers in their progress of understanding Liberal Studies are examined, in close relation to migrant teacher retention in Hong Kong.
The findings of this study illustrate South Korean Liberal Studies students’ overall discontent with their learning, as differences in cultural and educational background, such as language and secondary education curriculum, hinder their fruitful teacher training experience in Hong Kong.published_or_final_versionEducationBachelorBachelor of Education in Liberal Studie
Efficient importance sampling function design for sequential Monte Carlo PHD filter
No full textIn this paper, we propose a novel implementation of the probability hypothesis density (PHD) filter based on the sequential Monte Carlo (SMC) method called SMC-PHD filter. The SMC-PHD filter is analogous to the sequential importance sampling which generates samples using an importance sampling (IS) function. Even though this filter permits general class of IS density function, many previous implementations have simply used the state transition density function. However, this approach leads to a degeneracy problem and renders the filter inefficient. Thus, we propose a novel IS function for the SMC-PHD filter using a combination of an unscented information filter and a gating technique. Further, we use measurement-driven birth target intensities because they are more efficient and accurate than selecting birth targets selected using arbitrary or expected mean target states. The performance of the SMC-PHD filter with the proposed IS function was subsequently evaluated through a simulation and it was shown to outperform the standard SMC-PHD filter and recently proposed auxiliary PHD filter. © 2012 Elsevier B.V. All rights reserved
ACR902391 Supplemental material - Supplemental material for Top-cited articles versus top Altmetric articles in nuclear medicine: a comparative bibliometric analysis
No full textSupplemental material, ACR902391 Supplemental material for Top-cited articles versus top Altmetric articles in nuclear medicine: a comparative bibliometric analysis by Sora Baek, Dae Young Yoon, Kyoung Ja Lim, Ji Hyun Hong, Ji Yoon Moon, Young Lan Seo and Eun Joo Yun in Acta Radiologica</p
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