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Planning of Memorial History Park using Abandoned Gyeongchun Line Site
Youngdae Kim,MyungSun Kim,HwanHee Lee 한국색채학회 2017 AIC 2017 Jeju Vol.2017 No.10
In the past, people made efforts for destroying an existing building and constructing a new one in order to improve spaces in the city center and for making space, using a space regeneration method for city regeneration. In such cases, “color” is used as a method of space regeneration, and it plays an important role considering various aspects in spatial planning, such as theme compliance, visibility, and attention, and it is an effective method that can maximize purpose, with a relatively high economic efficiency. Hwarangdae, a modern simple station located in Gongneung-dong, Nowon-gu, Seoul, is an abandoned station, which currently does not function as a station and is designated and preserved as a historical cultural property. However, the local government, thinking that it is not desirable to keep the abandoned station, is trying to rebuild it as a place for conservation and coexistence at the same time. Considering the history, cultural values, and aesthetics of the scenery of Hwarangdae abandoned station, this study was conducted to plan a memorial park using the abandoned Gyeongchun Line site. The objective was to investigate and analyze the space and color of Hwarangdae abandoned station, which is the target place to establish a space plan, and suggest the regeneration theme of Memorial History Park. The shape was composed of straight lines, curved lines, and oblique lines based on the theme of railroad; in the color aspect, the achromatic group of Gray series gave the appearance of tone on tone, complementing the feeling of calm and a reverent feeling of the historic memorial park; it was harmonized with the natural landscape using the color of yellow forsythia flowers blooming in spring as a highlight color to neutralize static and calm images. We believe that this study will be used as a reference for various projects of urban regeneration and space reconstruction, and the Hwarangdae abandoned station will be rebuilt into a better space for citizens as a recreational park.
( Young Dae Kim ),( Dongbeom Song ),( Ji Hoe Heo ),( Beom Kyung Kim ),( Jun Yong Park ),( Do Young Kim ),( Sang Hoon Ahn ),( Kwang-hyub Han ),( Kwang Joon Kim ),( Seung Up Kim ) 대한간학회 2016 춘·추계 학술대회 (KASL) Vol.2016 No.1
Aims: Transient elastography (TE) assess the degree of liver fibrosis and steatosis. The degree of liver fibrosis was associated with the presence and burden of cerebral microbleeds in healthy, asymptomatic participants. We investigated the correlation between the degree of liver fibrosis, as assessed using TE, and the risk of stroke. Methods: Patients who were admitted due to the management of stroke and received TE examination from April 2013 to August 2014 and subjects who underwent a medical health check-up including TE during the same period were recruited. Significant fibrosis was defined as a liver stiffness (LS) value of ≥8 kPa and hepatic steatosis was defined as a controlled attenuation parameter (CAP) of ≥250 dB/m. Subjects with inappropriate TE results and alcoholic/ chronic viral liver diseases were excluded. Further, we conducted propensity score matching to reduce the potential effects of selection bias and confounding factors. Results: A total of 295 patients with stroke and 2,936 subjects with health check-up were analyzed. The mean age and the proportion of hypertension, diabetes, hypercholesterolemia, chronic kidney disease, and metabolic syndrome were significantly higher in patients with stroke than those of subjects with health check-up (all P<0.05). The mean LS value (5.6 kPa, vs. 4.2 kPa) and the proportion of significant fibrosis (9.2% vs. 2.7%) were significantly higher in patients with stroke than those of subjects with health check-up (all P<0.05), whereas the mean CAP value and the proportion of hepatic steatosis were statistically similar between two groups (all P>0.05). When fibrotic burden was assessed using TE, it was significantly higher in patients with stroke than that of subjects with health check-up, regardless of body mass index (BMI) (mean 5.3 kPa vs. 3.9 kPa in BMI<25 kg/m2 and 6.3 kPa vs. 4.7 kPa in BMI ≥25 kg/m2), CAP value (mean 5.3 kPa vs. 3.9 kPa in CAP<250 dB/m and 6.3 kPa vs. 4.7 kPa in CAP≥250 dB/m), and metabolic syndrome (mean 5.3 kPa vs. 4.1 kPa in the absence of metabolic syndrome and 5.9 kPa vs. 5.0 kPa in the presence of metabolic syndrome) (all P<0.05). As a continuous variable, unadjusted odd ratio (OR) of LS value for stroke was 1.161 and adjusted ORs were calculated as between 1.132 to 1.213 according to varying multivariate models. As a categorical variable, unadjusted OR of significant fibrosis was 4.388 and adjusted ORs were calculated as between 3.474 to 6.397 according to varying multivariate models. In a propensity matched analysis using 1:1 ratio (n=197 for each group), LS value was independently associated with the risk of stroke (OR of 1.080 as a continuous variable and 8.488 as a categorical variable) (all P<0.001). Conclusions: In our case-control study, we found that the degree of liver fibrosis, as assessed using TE, was significantly associated with the risk of stroke. Further studies investigating the dynamic link between these two disease entities are required.
Electrorheological properties of polypyrrole-silica nanocomposite suspensions
Young Dae Kim,Gi Gwang Hong 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.7
The electrorheological (ER) and dielectric properties of PPy-silica nanocomposite suspensions in silicone oil were investigated. Various PPy-silica nanocomposite particles were synthesized by suspension polymerization in the presence of silica nanoparticles controlling the ratio of silica/pyrrole during the polymerization. The ER response and the particle conductivity increased with the increase in the silica/pyrrole ratio, indicating that the increased particle polarization plays a role in enhancing the ER response. The dielectric properties of PPy-silica nanocomposite particles and their suspensions support that the enhanced ER response with the increase in the silica/pyrrole ratio arises from the enhanced polarization, which originates from the increased particle polarization.
( Young Dae Kim ),( Mi Seon Park ),( Byung Hwa Min ),( Seong Jae Jeong ),( Hyung Chul Kim ),( Hyun Il Yoo ),( Won Chan Lee ),( Jae Suk Choi ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.10
An eco-friendly integrated multi-trophic aquaculture (IMTA) farming technique was developed with the goal of resolving eutrophication by excess feed and feces as fish-farming by-products. A variety of seaweed species were tried to remove inorganic nutrients produced by fish farming. However, there have been few trials to use Sargassum fulvellum in an IMTA system, a species with a relatively wide distribution across regions with various habitat conditions, great nutrient removal efficiency and importance for human food source and industrial purposes. In this regard, our study tried to examine feasibility of using S. fulvellum in an IMTA system by analyzing growth characteristics of the species in an IMTA system comprising of rockfish (Sebastes shlegeli), sea cucumber (Stichopus japonocus) and the tried S. fulvellum (October 2011 - November 2012). We also monitored environment conditions around the system including current speed, water temperature and inorganic nutrient level as they may affect growth of S. fulvellum. S. fulvellum in the IMTA system, which were 15.72±5.67 mm long at the start of the experiment in October 2011, grew to a maximum of 1093±271.13 mm by May 2012. In September, seaweed growth was reduced to a minimum of 280±70.43 mm in length. Then, S. fulvellum began to grow again reaching 325±196.19 mm by November 2012. Wet weight of the seaweed was 4.01±1.89 g at the start of the experiment and reached a maximum of 109.26±34.23 g in May. The weight gradually declined to a low of 15.12±8.40 g in September 2012. Weight began to increase once more, rising to 39.27±21.69 g by November. During the experiment, the average velocity at the surface and the bottom was 6.5 cm/s and 3.4 cm/s, respectively. The water temperature ranged 5.0-23.5 ℃, which was considered suitable for growing S. fulvellum. Results of the study indicated no significant differences in inorganic nutrients between pre- and post-IMTA installation. It was thus concluded that S. fulvellum can be a suitable seaweed species to be used in an IMTA system.