http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Sang-Hyun Oh,Eui-Seong Hwang,Eun-Seok Choi,Gyu-Dong Park,Jin-Gu Kim,Jin-Yong Seong,Jun-Hee Cho,Keun-Do Ban,Keun-Hwan Noh,Nam-Kyeong Kim,Seaung-Suk Lee,Seok-Won Lee,Seung-Jin Yeom,Soon-Yong Kweon,Suk-K 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
We have investigated the ferroelectric properties of integrated Pt/SrBi2Ta2O9 (SBT)/Pt capacitors with capacitor-level dielectric of boron phosphosilicate glass (BPSG). A signicant reduction of remanent polarization (P-P^) was observed in the SBT capacitor as covered with BPSG lm and the polarization decay depended strongly on top electorde size. Detailed analyses showed the degradation resulted from bismuth loss in the surface region of SBT, which is closely related with the impurites diused from BPSG into SBT layer. The degradation of Pt/SBT/Pt ferroelectric capacitor was successfully prevented by inserting SiO2 layer as a impurity blocking layer between the SBT and the BPSG. Thereby device performances of SBT-based ferroelectric memory were also considerably improved.
Bending Strength of Korean Softwood Species for 120 × 180 mm Structural Members
Sung Jun Pang,Joo Saeng Park,Kweon Hwan Hwang,Gi Young Jeong,Moon Jae Park,Jun Jae Lee 한국목재공학회 2011 목재공학 Vol.39 No.5
The goal of this study is to investigate bending properties of domestic timber. Three representative structural timber from Larix kaempferi, Pinus koraiensis, and Pinus densiflora, in the northeastern South Korea were selected. Visual grading for the timber was conducted based on KFRI notification 2009-01 and the bending strength for the timber was evaluated based on ASTM D 198 bending. The high percentage of grade 1 and 2 for Larix kaempferi shows that the KFRI notification was optimized for this species. The bending strength distributions from Pinus koraiensis and Pinus densflora were very similar. It could be possible to specify the allowable bending properties of these two Specification using a united species group similar to spruce-pine-fir. Lastly, the bending strength of 120 × 180 mm structural members was higher than both existing values in KBC 2009 and design values for timber of imported species described in the NDS. Thus, 120 mm thick domestic sofiwoods could replace the commercial imported species and the KBC should be modified to provide design values for both timber and dimensional lumber, respectively, like NDS.
Solubility and Conformation of Silk Fibroin Membrane
Kweon, Hae-Yong,Kang, Seok-Woo,Lee, Kwang-Gill,Park, Kwang-Young,Jo, You-Young,Kang, Pil-Don,Sung, Gyoo-Byung,Lee, Heui-Sam,Yeo, Joo-Hong,Shin, Kyu-Hwan,Park, Chan-Hum Korean Society of Sericultural Science 2011 International Journal of Industrial Entomology Vol.22 No.2
Transparency and insolubility of eardrum patch against exudates are important for otolaryngological surgery. The author prepared silk fibroin (SF) films with various concentrations and temperature and then examined solubility and conformation of SF films. SF films were transparent regardless of the various preparation conditions. Although most SF films are soluble in 1X PBS solution at $37^{\circ}C$ for 1 h, the SF film with 3.4% with $60^{\circ}C$ was insoluble. Scanning electron microscopy (SEM) showed that the SF films have solid and smooth surface. Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC) results showed that the conformation of SF films was influenced by the preparation conditions including SF concentration and casting temperature. In conclusion, SF membrane with transparence and insolubility against exudates could be considered as eardrum patch resources.
Kweon, Hyuck-Min,Oh, Sang-Ho,Choi, Young-Hwan The Society of Naval Architects of Korea 2013 International Journal of Naval Architecture and Oc Vol.5 No.4
A steel-type breakwater that uses a submerged dual horizontal porous plate was originally proposed by Kweon et al. (2005), and its hydrodynamic characteristics and design methodology were investigated in a series of subsequent researches. In particular, Kweon et al. (2011) proposed a method of estimating the vertical uplift force that acts on the horizontal plate, applicable to the design of the pile uplift drag force. However, the difference between the method proposed by Kweon et al. (2011), and the wave force measured at a different time without a phase difference, have not yet been clearly analyzed. In this study, such difference according to the method of estimating the wave force was analyzed, by measuring the wave pressure acting on a breakwater model. The hydraulic model test was conducted in a two-dimensional wave flume of 60.0 m length, 1.5 m height and 1.0 m width. The steepness range of the selected waves is 0.01~0.03, with regular and random signals. 20 pressure gauges were used for the measurement. The analysis results showed that the wave force estimate in the method of Kweon et al. (2011) was smaller than the wave force calculated from the maximum pressure at individual points, under a random wave action. Meanwhile, the method of Goda (1974) that was applied to the horizontal plate produced a smaller wave force, than the method of Kweon et al. (2011). The method of Kweon (2011) was already verified in the real sea test of Kweon et al. (2012), where the safety factor of the pile uplift force was found to be greater than 2.0. Based on these results, it was concluded that the method of estimating the wave force by Kweon et al. (2011) can be satisfactorily used for estimating the uplift force of a pile.
Kweon, Dae-Cheol,Lee, Jong-Woong,Choi, Ji-Won,Yang, Sung-Hwan,Dong, Kyung-Rae,Chung, Woon-Kwan The Korean Association for Radiation Protection 2011 방사선방어학회지 Vol.36 No.4
The use of intravenous catheters are occasionally complicated by intravascular fragments and swelling of the catheter fragments. We present a patient in whom an intravenous catheter fragments was retrieved from the dorsal metacarpal vein following its incidental CT examination detection. The case of demonstrates the utility of microscopy and multi-detector CT in localizing small of subtle intravenous catheter fragments as a human error. A case of IV catheter fragments in the metacarpal vein, in which reproducible and microscopy data allowed complete localization of a missing fragments and guided surgery with respect to the optimal incision site for fragments removal. These reproducible studies may help to determine the best course of action and treatment for the patient who presents with such a case.