호적의 직권정정과 추완신고에 관한 고찰

류진화 법조협회 1999 法曹 Vol.48 No.7

Design and Analysis of Refractometer Based on Bend Waveguide Structure with Air Trench for Optical Sensor Applications

류진화,Woo-Jin Lee,이봉국,도이미,이강복,백규하,엄남경 한국전자통신연구원 2014 ETRI Journal Vol.36 No.5

New ways of achieving small, multiband,multifunctional, and standard solutions for mobilehandset antennas are demanded in the current wirelessmarket. A non-resonant element of 5 mm × 5 mm × 5 mm,a matching network, and a 100 mm × 40 mm slottedground plane are proposed to satisfy mobile marketdemands that require multiband operation and smallantenna solutions. The main advantage of the proposeddesign is that with only one non-resonant element ofconsiderably small size (0.015, 900 MHz), the handset iscapable of providing operation at mobile bands.

광 PCB 및 패키징 기술

류진화,김동민,김응수,정명영,Ryu, Jin-Hwa,Kim, Dong-Min,Kim, Eung-Soo,Jeong, Myung-Yung 한국마이크로전자및패키징학회 2011 마이크로전자 및 패키징학회지 Vol.18 No.1

According to increasing of data transfer rate, printed circuit board (PCB) is required improvement of transmission speed. Optical PCB and its packaging technology can be one of the solutions that overcome the limitations of conventional electrical PCB. The data transmission capacity will be increased 10 Tbps at 2015. To this end, studies on various OPCB technologies are being conducted. For cost-effective and high- performance OPCB, studies of optical coupling by polymer replication process are conducted. In this work, optical waveguide and optical fiber array block were sequentially fabricated by polymer pattern replication method. Using this method we successfully demonstrate low loss optical fiber coupling between optical waveguide and optical fiber arrays. And researches on flip chip bonding process and using electro-optic connectors for packaging are conducted.

SPL과 소프트 리소그래피를 이용한 나노 구조물 형성 연구

류진화(Jin Hwa Ryu),정명영(Myung Yung Jeong),김창석(Chang Seok Kim) Korean Society for Precision Engineering 2006 한국정밀공학회지 Vol.23 No.7

A nanopatterning technique was proposed and demonstrated for low cost and mass productive process using the scanning probe lithography (SPL) and soft lithography. The nanometer scale structure is fabricated by the localized generation of oxide patterning on the H-passivated (100) silicon wafer, and soft lithography was performed to replicate of nanometer scale structures. Both height and width of the silicon oxidation is linear with the applied voltagein SPL, but the growth of width is more sensitive than that of height. The structure below 100 ㎚ was fabricated using HF treatment. To overcome the structure height limitation, aqueous KOH orientation-dependent etching wasperformed on the H-passivated (100) silicon wafer. Soft lithography is also performed for the master replication process. Elastomeric stamp is fabricated by the replica molding technique with ultrasonic vibration. We showed that the elastomeric stamp with the depth of 60 ㎚ and the width of 428 ㎚ was acquired using the original master by SPL process.

전자우편을 이용한 설문조사시 응답률, 응답속도, 자료의 질에 영향을 미치는 요인들에 대한 연구

류진화(Jin Hwa Ryu),김종훈(Jong Hoon Kim) 한국경영학회 2003 經營學硏究 Vol.32 No.2

This study investigates what factors affect the response rate, speed, and quality of e-mail survey. It is suggested that the influencing elements include six factors such as personalization, sponsorship, incentives, prenotification. and follow-ups. To verify the validity of six sets of research hypotheses s developed in the study, an experiment with e-mail users was Performed. The 17,480 users identified with e-mail address search-engines were allocated to sixty-four experimental groups through a randomization process. Then, the experimental units of each group were exposed to a unique set of values of independent variables, and their responses to e-mail survey were observed The 652 experimental units responded to the survey, and the response rate turned out to be 3.73%. Data analysis with the ANOVA and Chi-square Test methods showed that five factors except prenotification (personalization, sponsorship, incentives, questionnaire format, and follow-ups) had the impacts on the respondents responses corresponding to the hypotheses, at least to some extent, Yet, with respect to the response speed among the three response dimensions, non of six factors showed any impact corresponding to the hypotheses. Specifically, it was shown that personalization had a positive impact on the response rate and quality as the hypotheses suggest. Using the university sponsorship affected the response rate and quality positively as compared to the use of Private company sponsorship. In contrast, Providing incentives to the test units shoved no significant impact on the response rate and speed. But, some partial evidences for the hypothesis were observed with respect to the impact of incentives un the response quality, questionnaire format seemed to affect the response rate to a significant degree as hypothesized, and it was Partly demonstrated that the factor affected the response quality. In addition, sending follow-ups increased the response rate as hypothesized, but the factor showed no significant impact on the response speed and qualify.

임프린트 기반 마이크로 광도파로의 변형 특성 연구

류진화(Jin Hwa Ryu),김창석(Chang Seok Kim),정명영(Myung Yung Jeong) Korean Society for Precision Engineering 2008 한국정밀공학회지 Vol.25 No.11

We have studied the characteristic changes of optical device using imprint lithography. An imprinted structure is inherently involved in residual stress due to the temperature and the pressure cycle during fabrication process. A structure with residual stress undergoes stress relaxation, which leads to dimensional change. Therefore, annealing processes was performed to reduce the residual stress of imprinted polymer channel. Reduction of residual stress was confirmed through dimensional change, birefringence, and the mechanical properties. We have fabricated an optical device, and it saw the optical intensity changes within 0.1 % for 1 month.

SPL에 의한 나노구조 제조 공정 연구

류진화(J. H. Ryu),김창석(C. S. Kim),정명영(M. Y. Jeong) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월

The fabrication of mold for nano imprint lithography (NIL) is experimentally reported using the scanning probe lithography (SPL) technique, instead of the conventional E-beam lithography technique. The nanometer scale patterning structure is fabricated by the localized generation of oxide patterning on the silicon (100) wafer surface with a thin oxide layer. The fabrication method is based on the contact mode of scanning probe microscope (SPM) in air. The precision cleaning process is also performed to reach the low roughness value of R<SUB>rms</SUB> = 0.084 ㎚, which is important to increase the reproducibility of patterning. The height and width of the oxide dot are generated to be 15.667 ㎚ and 209.5 ㎚, respectively, by applying 17 V during 350 ㎳.

전자우편 설문조사 반응에 관한 문헌적 고찰

김종훈,류진화 한국조사연구학회 2002 조사연구 Vol.3 No.2

The use of internet is expanding globally in a rapid way. The situation is similar in Korea. The growth of internet affects the various aspects of a social system. Such an impact is not an exception in the field of survey data-collection. The internet survey method has gained a recognition as an important survey approach in the U.S. and Europe. A number of Korean research organizations have already started implementing the new survey method, too. The time is quite ripe for the internet survey in Korea. However, it is hard to find ever a good literature review on the subject. This study intends to review the results of the past studies about the question of what factors influence the response rate, speed, and quality. The influencing factors incorporated in this review include six elements: personalization, the survey sponsorship, incentives, the questionnaire format, prenotification, and follow-ups. Regarding there sis factors, the results of the past studies relating to the internet survey response are reviewed in a systematic way 인터넷 이용은 전 세계적으로 아주 빠른 속도로 확산되고 있고 이러한 추세는 한국도 마찬가지이다. 인터넷 성장은 사회 시스템 전반에 큰 영향을 미치고 있으며, 대표적 자료수집방법인 서베이 분야에도 그 영향은 예외가 아니다. 이미 미국, 유럽의 선진국에서는 인터넷 서베이가 크게 각광받고 있으며, 우리나라의 여러 조사기관들도 인터넷 서베이를 실시하고 있다. 인터넷 서베이는 우리나라에도 어느 정도 그 여건이 성숙되어 있다고 볼 수 있다. 그렇지만 아직 응답자의 응답에 영향을 주는 요인에 대한 선행연구조차 정리되어 있지 못하고 있는 실정이다. 본 연구는 전자우편 설문조사에 있어 어떤 요인들이 응답자의 반응, 즉 응답률과 응답속도, 응답품질에 영향을 미치는가 하는 문제에 대한 기존의 연구결과를 정리하고 있다. 문헌연구의 대상으로 포함된 영향요인은 개인화, 조사기관의 성격, 응답자에 대한 보상, 설문지 형식, 사전알림, 후속편지의 여섯 개다. 이들 여섯 개 영향요인을 중심으로 전자우편 설문조사를 이용한 기존의 선행연구 결과들을 정리해보고자 한다.

광 패키징 및 인터커넥션 기술

김동민,류진화,정명영,Kim, Dong Min,Ryu, Jin Hwa,Jeong, Myung Yung 한국마이크로전자및패키징학회 2012 마이크로전자 및 패키징학회지 Vol.19 No.4

By the need for high-speed data transmission in PCB, the studies on the optical PCB has been conducted with optical interconnection and its packaging technology. Particularly, the polymer-based optical interconnection has been extensively studied with the advantages such as cost-effective and ease of process. For high-efficiency and passive alignment, the studies were performed using the 45 degree mirrors, MT connector, and etc. In this work, integrated PLC device and fiber alignment array block was fabricated by using imprint technology to solve the alignment and array problem of optical device and the optical fiber. The fabricated integrated block for optical interconnection of PLC device has achieved higher precision of decreasing the dimensional error of the patterns by optimization of process and its insertion loss has an average value of 4.03dB, lower than criteria specified by international standard. In addition, a optical waveguide with built-in lens has been proposed for high-efficiency and passive alignment. By simulation, it was confirmed that the proposed structure has higher coupling efficiency than conventional no-lens structure and has the broad tolerance for the spatial offset of optical waveguide.

디지털 미디어플레이어 기업의 해외시장 진출 - (주)레인콤의 사례

김종훈,류진화 한국국제경영관리학회 2004 국제경영리뷰 Vol.8 No.2