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이명래,김경래,신원진,김창교,홍진수,Lee, Myoung-Rae,Kim, Gyeong-Rae,Shin, Won-Jin,Kim, Chang-Kyo,Hong, Chin-Soo 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.2
Photonic crystal is dielectric materials or a set of different dielectric materials with periodic structure. Line defect is obtained by leaving out a row of rods along the $\Gamma$-X direction. We showed the change of group velocity in waveguide mode and found resultant small group velocity. Characteristics of the small group velocity were described by electric field distribution. Investigating the phase shift, it is confirmed if small group velocity is positive or negative.
원발성 세균성 복막염 진단에 있어서 혈액 배양 배지를 이용한 복수 배양법의 유용성
이명래(Myung Rae Lee),전재윤(Jae Yoon Chon),문영명(Young Myoung Moon),박인서(In Suh Park),이경원(Kyung Won Lee) 대한소화기학회 1995 대한소화기학회지 Vol.27 No.6
N/A Background/Aims: Spontaneous bacterial peritonitis(SBP) is a serious and frequently fata1 compli- cation in cirrhotics, therefore earlier detection and earlier institution of appropriate treatment is crucial for good result. However, the conventional method of ascitic tluid culture has a low sensitivity in detecting causative organism of SBP. Methods: We have compared the sensitivity of the conventional method to the bedside inoculation of ascites into blood culture media. Two kinds of ascites culture methods were compared in cirrhotic patients with spontaneous bacterial peritoni- tis: 1) conventional(on blood agar, MacConkey agar, thioglycolate broth, and phenylethanol blood agar) and 2) blood culture media method(inoculation of each S mL of ascites into one 30-mL tryptic soy broth bottle and one30-mL thioglycolate broth bottle at the patients bedside. Results: In a 55-month period, 67 episodes of SBP in 61 cirrhotic patients were examined using simultane- ous both culture methods. The conventional method grew bacteria in 22 episodes(32.8%), whereas the blood culture media method grew in 55 episodes(82.1%), which showed a significantly higher sensitivity(p0.005). The organisms most frequently isolated in ascitic fluids in this study were aerobic gram-negative bacteria(88.37o), among them E. coli was the most most common pathogen comprising 55.0% of total isolates. The conventional method grew five species of organism whereas the b]ood culture media did eleven species. Most of E. coli were susceptible to amino- glycosides, third generation cephalosporins, aztreonam, and ofloxacin, but resistant to ampicil]in. Conclusions: It is suggested that the inoculation of ascitic fluid to a blood culture media is more sensitive than the conventional method and shou]d be routinely used for ascitic fluid culture in cirrhotic patients. (Korean J Gastroenterol 1995;27: 659 - 672)
김경래,이명래,신원진,김창교,홍진수,Kim, Gyeong-Rae,Lee, Myoung-Rae,Shin, Won-Jin,Kim, Chang-Kyo,Hong, Chin-Soo 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.2
A plane wave expansion method (PWEM) was applied for photonic band structure calculation. We examined zero group velocity modes in photonic crystal. The zero group velocity modes were obtained at the second band along F-K direction. We expanded higher order Brillouin zone (BZ) to find the locations of zero group velocity modes and to investicate their properties. We found twelve locations, inside the first Brillouin zone, where the group velocities became zero. Also, we calculated band structure and group velocity in off-plane configuration.
홍진수(Chinsoo Hong),김창교(Chang-Kyo Kim),이병욱(Byoung-Wook Lee),이명래(Myoung-Rae Lee) 제어로봇시스템학회 2008 제어·로봇·시스템학회 논문지 Vol.14 No.4
The LGP with nanometer structures resulted in enhancement of optical efficiency. Its fundamental mechanism is to recycle the polarized light via one round-trip through QWP(Quarter-Wave Plate) but the maximum efficiency to reach with this method is limited up to 2. To get the larger efficiency than this limited one a LGP with nanometer-patterned grating is suggested. For its optimum design the computer simulation is performed and suggests a grating that the spatial frequency between adjacent patterns is 500nm, its height 250nm, duty cycle 50%, and its cross section is rectangular. On the basis of simulation results the LGP with nanometer-patterned grating is fabricated and its optical properties such as angular intensity distribution and CIE color coordinates are characterized. The angles of transmitted light are nearly the same as the results expected from the generalized Snell"s law. Thus the Mathematica code, developed in this experiment, will be applied to designing the optimized LGP. The LGP with nanometer-patterened grating shows the enhancement of transmitted intensity distribution up to 4.9 times.
강진경,박인서,문영명,정재복,이세준,양우익,박찬일,송시영,이명래 대한소화기내시경학회 1996 Clinical Endoscopy Vol.16 No.2
Primary gastric lymphorna represents one to 7% of all gastric cancer and is the most common type of extranodal lymphoma. In attempt to evaluate the endoscopic characteristics, we analysed clinical and endoscopic findings in 35 patients with primary gastric lymphoma between January 1980 and August 1994 at the Yonsei Medical Center. The results were as follows: 1) The mean age of patients was 47.1 years with male to female ratio of 1.5:1. 2) Gastroscopy was performed in all 35 patienits, which revealed polypoid lesion in one case(2.9%), ulcerative lesion in 15 cases(42.9%), ulcero-infiltrative lesion in 6 cases(17.1%) and diffuse infiltrative lesion in 2 cases(5.7%). Gastric lymphoma was suggested in 6 cases, advanced gastric cancer in 21 cases, early gastric cancer in 5 cases and benign gastric ulcer in 3 cases. Pathologic diagnosis of biopsy specimens were gastric lymphoma in 24 cases, adenocarcinoma in 5 cases and chronic superficial gastritis in one case. 3) The characteristics of the endoscopic findings in gastric lymphoma were intractable or recurrent ulcer in 10 cases, thickened and mounded ulcer margin in 9 cases, multiple ulcers in 9 cases, giant rugae in 7 cases and polypoid or depressed lesion with central ulceration in 4 cases. In conclusion, recognition of specific endoscopic findings such as intractable or recurrent ulcer, volcano-like ulcer, multiple ulcers, giant rugae and combined lesion, the possibility of a lymphoma should be considered and vigorous biopsy attempts should be carried out. Then if the first microscopic report does not suggest this diagnosis, a second investigation including jumbo biopsies, perhaps by diathermy, should be undertaken.