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Jeongwon Ryu,Jiyong Lee,Jungsik Choi 보안공학연구지원센터(IJSEIA) 2016 International Journal of Software Engineering and Vol.10 No.2
The introduction of BIM into complex buildings is essential and open BIM environment for communication between different kinds of work is an important element with the increasing demand for freeform buildings considering the value as being landmarks. IFC which is a standard integration model in the construction industry has been developed in buildingSMART International aiming for the interoperation of different information model tools. IFC is not only compatible for geometry information but also compatible for property information of the construction, and the standard protocol for data exchange in CAD tool representing BIM has been established for IFC. However, extensive time and costs have been spent since the geometry information is separately established and utilized in the certain software due to poor communication regarding precise geometry information in free-from projects of large scale. Information delivery has been insufficient because of not using BIM authoring tools but CAD-tools. The purpose of this study was to propose the process allowing the conversion of free-from shape into IFC file and the conversion with BIM software by coding the information regarding complex shape of free-from buildings. For this, the improvement in compatibility for geometry information and property information of free-form buildings is expected and improvement in communication and reduction in work duration and costs in different works in each area of the construction industry handling complex shape and property information are ultimately expected.
류장발(Ryu Jangbal),장정원(Jeongwon Jang) 한국양봉학회 2008 韓國養蜂學會誌 Vol.23 No.3
Newly found honeyplants were described from 2003 to 2007 by observation near Daegu city. They were Cardamine leucantha, Idesia polycarpa, Ilex macropoda, Grewia biloba var. parviflora, Sapium sebiferum, Lirioope platyphylla. Ulmus parvifolia. Saussurea pulchella, Orostachys japonicus, Osmanthus heterophyllus. Characteristics and morphology of each plant were described.
( Yongjun Choi ),( Jeongwon Ryu ),( Sang Rak Lee ) 한국축산학회 2020 한국축산학회지 Vol.62 No.1
Organic waste used as a feedstock in the anaerobic digestion (AD), it includes carbon and nitrogen. Carbon and nitrogen have an effect on the various digestive characteristics during AD, however, the study is rare about those of the interaction. This study investigates the influence of carbon type and carbon to nitrogens (C/N ratios) on the AD characteristics of organic waste. Experimental treatments involved a combination of three carbon types with three C/ N ratios. The AD tests were carried out using a 125-mL serum bottle at a constant temperature of 37℃ and moisture 95% for 18 days. Degradation pattern shows the difference among three-carbon treatments, the starch group was faster than other groups. Maximum methane production date was similar between starch (9.96 ± 0.05 day) and xylan group (10.0 ± 0.52 day), those of the cellulose group (14.6 ± 1.80 day) was slower than other groups (p < 0.05). The lag phase was only affected by the carbon type (p < 0.05). Ammonia nitrogen was mainly affected by nitrogen concentration regardless of carbon type (p < 0.05). This study showed that xylan is useful as feedstock in order to decrease the lag phase, and it showed that ammonia was independently affected by the nitrogen concentration.
Chong-Kun Ryu,Jae-Eun Pie,Jae Gol Choe,Joon Cheon,Jeongwon Sohn,Jurgen Seidel,David S. Paik,Michael V. Green,Chang H. Paik,Meyoung-Kon Kim 한국환경성돌연변이발암원학회 2001 한국환경성돌연변이·발암원학회지 Vol.21 No.1
We have synthesized 99mTc-mercaptoacetyltriglycine (MAG3)-biocytin as a new imaging agent for hepatobiliary scintigraphy. The aim of this study was to evaluate the usefulness of 99mTc-MAG3-biocytin scintigraphy in differentiating carbon tetrachloride (CCl₄)-induced hepatotoxicity from a-naphthylisothiocyanate (ANIT)-induced cholestasis in mice, which reflecting the differential diagnosis of neonatal jaundice caused by neonatal hepatitis from congenital biliary atresia in humans. Methods: Balb/c mice (female, 20 g, n=4-6) were pretreated with CCl4 (0.5 or 1.0 ml/kg) and ANIT (150 or 300 mg/kg) 18 h before scintigraphy. Biochemical and histopathological examinations showed a pattern of typical acute hepatitis (increase of transaminases and hepatocellular necrosis) in CCl4-treated mice and cholestasis (increase of alkaline phosphatase and g-glutamyltransferase, and biliary hyperplasia) in ANIT-treated mice, respectively. Mice were fasted at least 4 hr prior to the intravenous injection of 99mTc-MAG3-biocytin (18.5 MBq/ 20㎍) in 2% human serum albumin in saline. Scintigraphy<br/> was performed with a g-camera equipped with a 1-mm diameter pin-hole collimator for 30 min and images were acquired every 15 s. We compared the values of physical parameters, such as peak liver/heart ratio (rmax) and peak ratio time (tmax) for 99mTc-MAG3-biocytin scintigraphy. Results: Scintigraphic parameters of the<br/> CCl₄-pretreated (0.5 ml/kg) group showed a 81.9% decrease of rmax, and 42.2% decrease of tmax, whereas the ANIT-pretreated (150 mg/kg) group showed a 53% decrease of rmax, and 2.36-fold increase of tmax, (P<0.05). These results demonstrate that the decrease of rmax and the shortening of tmax are characteristic features for<br/> hepatotoxicity, in contrast to the increase of tmax and decrease of rmax for biliary hyperplasia. Conclusion: 99mTc-MAG3-biocytin hepatobiliary scintigraphy can distinguish hepatitis from cholestasis in mice model and may be similarly useful in humans which differentiating the cause of neonatal jaundice in clinical study.