http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Kim, Gyungock,Park, Jeong Woo,Kim, In Gyoo,Kim, Sanghoon,Kim, Sanggi,Lee, Jong Moo,Park, Gun Sik,Joo, Jiho,Jang, Ki-Seok,Oh, Jin Hyuk,Kim, Sun Ae,Kim, Jong Hoon,Lee, Jun Young,Park, Jong Moon,Kim, Do- Optical Society of America 2011 Optics express Vol.19 No.27
<P>We present high performance silicon photonic circuits (PICs) defined for off-chip or on-chip photonic interconnects, where PN depletion Mach-Zehnder modulators and evanescent-coupled waveguide Ge-on-Si photodetectors were monolithically integrated on an SOI wafer with CMOS-compatible process. The fabricated silicon PIC(off-chip) for off-chip optical interconnects showed operation up to 30 Gb/s. Under differential drive of low-voltage 1.2 V(pp), the integrated 1 mm-phase-shifter modulator in the PIC(off-chip) demonstrated an extinction ratio (ER) of 10.5dB for 12.5 Gb/s, an ER of 9.1dB for 20 Gb/s, and an ER of 7.2 dB for 30 Gb/s operation, without adoption of travelling-wave electrodes. The device showed the modulation efficiency of V(π)L(π) ~1.59 Vcm, and the phase-shifter loss of 3.2 dB/mm for maximum optical transmission. The Ge photodetector, which allows simpler integration process based on reduced pressure chemical vapor deposition exhibited operation over 30 Gb/s with a low dark current of 700 nA at -1V. The fabricated silicon PIC(intra-chip) for on-chip (intra-chip) photonic interconnects, where the monolithically integrated modulator and Ge photodetector were connected by a silicon waveguide on the same chip, showed on-chip data transmissions up to 20 Gb/s, indicating potential application in future silicon on-chip optical network. We also report the performance of the hybrid silicon electronic-photonic IC (EPIC), where a PIC(intra-chip) chip and 0.13μm CMOS interface IC chips were hybrid-integrated.</P>
Kim, Gyungock,Park, Jeong Woo,Kim, In Gyoo,Kim, Sanghoon,Jang, Ki-Seok,Kim, Sun Ae,Oh, Jin Hyuk,Joo, Jiho,Kim, Sanggi Optical Society of America 2014 Optics letters Vol.39 No.8
<P>We present small-sized depletion-type silicon Mach-Zehnder (MZ) modulator with a vertically dipped PN depletion junction (VDJ) phase shifter based on a CMOS compatible process. The fabricated device with a 100 μm long VDJ phase shifter shows a VπLπ of 0.6??Vcm with a 3 dB bandwidth of 50??GHz at -2??V bias. The measured extinction ratios are 6 and 5.3 dB for 40 and 50??Gb/s operation under 2.5??Vpp differential drive, respectively. On-chip insertion loss is 3 dB for the maximum optical transmission. This includes the phase-shifter loss of 1.88??dB/100??μm, resulting mostly from the extra optical propagation loss through the polysilicon-plug structure for electrical contact, which can be readily minimized by utilizing finer-scaled lithography nodes. The experimental result indicates that a compact depletion-type MZ modulator based on the VDJ scheme can be a potential candidate for future chip-level integration.</P>
Electric Propulsion Naval Ships with Energy Storage Modules through AFE Converters
Kim, So-Yeon,Choe, Sehwa,Ko, Sanggi,Kim, Sungmin,Sul, Seung-Ki The Korean Institute of Power Electronics 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.2
This paper proposes a novel electric propulsion system for naval ships, which consists of Active Front End (AFE) converters directly connected to battery Energy Storage Modules (ESMs). Employing the proposed AFE converters with ESMs in the power systems of naval ships can enhance the reliability and quality of the electric power. Furthermore, the fuel-efficiency of the generator can be improved by a higher loading factor of the generator and its prime movers. The proposed AFE configuration does not require an additional dedicated DC/AC converter for the ESMs. Instead of that, the AFE converter itself can control the DC link voltage and the discharging and/or charging of the ESMs. A control scheme to achieve these control objectives is also presented in this paper. The overall power system, including the generators and electrical loads of a naval ship, is implemented by a small scaled Power Hardware-In-the-Loop (PHIL) simulator. Through this experimental setup, the proposed system configuration and the power control strategies are verified. It is shown that the fuel-efficiency and transient dynamics can be improved in the normal and contingency operation modes.
Vaginal leiomyoma in an adolescent woman
( Hyojin Kim ),( Taewon Jeong ),( Gyeongjin Kim ),( Yeongho Lee ),( Gyeonga Kim ),( Sanggi Hong ),( Sukyeong Beak ),( Jeongbeom Moon ),( Juhyang Lee ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-
We report a case of vaginal wall leiomyoma in a young lady. Vaginal wall is a rare area that leiomyoma occurs which has reported approximately 300cases until now whose average age is 35~50years old. But, the patient we report is 18 years old adolescent women with sexually virgin. She presented first at local gynecology clinic with frequent(every two weeks) menstruation and for excluding organic causes rectal ultrasonography was done. Through ultrasonography, 3.5 cm sized vaginal wall mass was observed. The patient was referred to Jesus hospital gynecology clinic. Digital rectal examination was done and it is confirmed that there was no rectal mucosal invasion and there is no tenderness. To know the character of the mass and relationship with surrounding organs, MRI was done. The mass was probably seen leiomyoma and located in rectovaginal septum. The surgery was planned for the pathologic diagnosis and, because the patient was sexually virgin, the mass removal was done by rectovaginal approach. The patient was recovered without complications and final pathologic diagnosis was vaginal wall leiomyoma.
역문제에 의한 9Cr-1Mo강의 SP-크리프와 일축인장크리프의 상관성 및 수명예측
김상기(Sanggi Kim),양성모(Sungmo Yang),유효선(Hyosun Yu),강희용(Heeyong Kang),박정은(Jungeun Park) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Most of the structural analysis are tested under uniaxial stress or small punch test. but there are also need to inverse problem to study relationship of these. The focus of this paper is to investigate the relationship between the small punch creep test and uniaxial creep test by inverse problem tool. Specimen is adopted 9Cr1MoVNb steel. Creep test were performed using a SP-Creep test at constant loads and high temperature conditions. To find the relationship of Uniaxial creep, FEM were also conducted at the same condition of SP-Creep test. From the basis of relationship of test results, the optimum size of specimen and inverse problem validity were determined. The last, creep life is predicted by using the modified power law.