19. 한국산 고등균류의 성분 연구 ( 제39보 ) 졸각버섯의 배양 균사의 항암성분의 정제 및 화학 분석에 관한 연구

김유진,우정원,정경수,이정옥,최응칠,김병각,김양섭,박용환 ( Yoo Jin Kim,Jeong Won Woo,Kyeong Soo Chung,Chong Ock Lee,Eung Chil Choi,Byong Kak Kim,Yang Sup Kim,Yong Hwan Park ) 한국균학회 1983 韓國菌學會誌 Vol.11 No.1

식중독 원인 미생물 장기 보존 방법에 대한 고찰

김유진,김수민,김소연,윤요한,Kim, Yujin,Kim, Soomin,Kim, Soyeon,Yoon, Yohan 한국식품위생안전성학회 2022 한국식품위생안전성학회지 Vol.37 No.3

The rapid development of biotechnology has increased the importance of microorganisms or their genetic information. Thus, the Nagoya Protocol on access to genetic resources and the fair and equitable sharing of benefits arising from their utilization was established, and countries are working to secure industrially and academically useful bioresources to deal with the agreement. In the case of Korea, because 67% of bioresources are imported from abroad, we are required to secure domestic bioresources as well. The number of isolated foodborne illness-causing microorganisms is predicted to invrease based on the incresing number of outbreaks of foodborne illness each year. Consequently, appropriate long-term preservation methods are necessary to secure the isolated microorganisms for the purpose of research and resourcification. Therefore, the long-term preservation methods for bacteria, fungi, viruses, and protozoa were investigated in this study, from domestic and international bioresource banks, and the functions of the cryoprotectants were reviewed and discussed. This review should be informative in the preservation of microorganisms and contribute to the development of biotechnology.

16. 한국산 고등균류의 성분연구 ( 제35보 ) 졸각버섯의 항암성분

김유진,김숙희,이정옥,정경수,최응칠,김병각 ( Sook Hee Kim,Yoo Jin Kim,Chong Ock Lee,Kyeong Soo Chung,Eung Chil Choi,Byong Kak Kim ) 한국균학회 1983 韓國菌學會誌 Vol.11 No.1

모바일 UI 기술동향 및 시장 전망

김유진,Kim, Y.J. 한국전자통신연구원 2012 전자통신동향분석 Vol.27 No.4

최근 아이폰이 등장하면서 인터페이스는 새롭게 재조명받게 되었으며, 다양한 모바일 기기가 제공하는 컴퓨팅 능력을 제대로 활용하기 위해서는 반드시 사용자 인터페이스가 필요하며 중요하다. 과거 사용자 인터페이스라는 말은 컴퓨터에 제한적으로 사용되었지만, 다양한 디지털 기기 그 중에서도 스마트폰의 출시로 인해 그 의미가 점차 확장되고 있다. 또한, 최근 들어 기술 및 성능화의 차별화가 한계에 봉착하면서 인터페이스 중심으로 경쟁 패러다임이 점차 변화하고 있다. 따라서 본고에서는 UI(User Interface)의 새로운 혁신을 이끌고 있는 스마트폰을 중심으로, 모바일 UI의 진화 방향 및 제조사별 UI 적용 현황을 살펴보고 이를 토대로 모바일 UI 기술동향과 모바일 UI 시장을 전망하고자 한다.

고속 무선 LAN 시스템 설계 및 구현

김유진,이상민,정해원,이형호,기장근,조현묵,Kim, You-Jin,Lee, Sang-Min,Jung, Hae-Won,Lee, Hyeong-Ho,Ki, Jang-Geun,Cho, Hyun-Mook 대한전자공학회 2001 電子工學會論文誌-TC (Telecommunications) Vol.38 No.6

본 논문에서는 고속 무선 LAN을 위한 MAC 프로토콜 프로세서 프로토타입의 설계 및 구현에 관해 기술하였다. 설계된 프로토콜 프로세서는 5GHz OFDM 물리계층과 인터페이스를 가진다. 먼저 IEEE 802.11 무선 LAN의 MAC 프로토콜 분석을 토대로 하드웨어와 펌웨어로 구현할 MAC 프로토콜 기능들을 분리하고 프레임 단위의 송수신 요구 처리가 가능한 RISC 프로세서와의 인터페이스 및 OFDM 물리계층과의 직렬전송 인터페이스를 설계하였다. 또한, MAC 프로토콜의 고속 처리를 위해 프로토콜 제어기능 및 송수신 기능을 하드웨어로 구현하였다. 개발된 MAC 하드웨어 블록은 10 MHz 주클록에서 동작하며, 이는 물리계층과의 정보교환이 옥텟 단위임을 고려할 때 물리계층에서의 속도 80Mbps에 해당한다. 설계된 FPGA MAC 기능 칩은 역시 본 연구에서 개발된 무선 LAN 시스템 프로토타입 보드에 실장되며, 다양한 DCF 기능에 대한 검증 결과 정상적으로 동작함을 확인하였다. Design and implementation of the MAC protocol processor prototype for high speed wireless LAN, which has interface with 5GHz OFDM PHY layer, is presented. We analyze the IEEE 802.11 MAC protocol specification and then separate the MAC protocol functions to be implemented by hardware and firmware and define the interface in which frames can be exchanged. That is, it is considered that high speed queue processing and interfaces with RISC processor and OFDM PHY layer. Protocol control and transmission/reception functions of the MAC functions are implemented in hardware in order to guarantee high speed processing in MAC layer. The developed MAC hardware block operates at 10MHz main clock. Therefore, transmission rate in PHY layer is about 80Mbps because data transmission/reception between MAC layer and PHY layer is performed as unit of octet. The designed FPGA MAC function chip has been implemented in wireless LAN test board and it is verified that DCF function is operated correctly.

대학 기숙사의 만족도 향상을 위한 시설관리(FM) 서비스 제안

김유진,신은영,김준하,Kim, Yu-Jin,Shin, Eun-Young,Kim, Jun-Ha 한국교육시설학회 2016 敎育施設 Vol.23 No.2

University dorm basically provides basic housing functions to students, however, it is very important in a sense that it provides students with various functions such as information exchange, cultural experience and learning environments as well. Additionally, continuous effort to improve users' satisfaction and living environments are needed due to the fact that physical environments of dorm facilities have higher impact on students. However, Many students are not satisfied with the physical environment of university dorms and also there is lack of systematic information whereas various functions are required by students. Therefore, the main objective of this research is to suggest the direction of FM services in order for improving students' satisfaction on the university dorm facilities in Korea. Precedent studies regarding the satisfaction or performance evaluation of dorm facilities have been extensively analyzed to extract the dissatisfaction factors that scored below the middle 50%. Secondly, for satisfaction improvement, Korean Standard for Facility Management(KS_FM) have been matched with those extracted dissatisfaction factors to suggest the direction of FM services by rules and regulations review and best practice studies. This research will be useful for university dorm facility managers in planning strategic FM and providing effective FM services to students.

Quantitative Analysis on Cellular Uptake of Clustered Ferrite Magnetic Nanoparticles

김유진,Bum Chul Park,Young Soo Choi,고민준,Young Keun Kim 대한금속·재료학회 2019 ELECTRONIC MATERIALS LETTERS Vol.15 No.4

Due to their ability to be internalized into cells by endocytosis through cell membranes, the application of nanoparticlesin therapeutic and diagnostic fields has received much interest. In particular, ferrite magnetic nanoparticles (MNPs) arewidely used as reagents for medical care, including in vitro magnetic separation, T2-weighted magnetic resonance imaging,magnetic hyperthermia therapy, and as drug delivery systems. However, little is known about the quantitative analysis ofthe cellular uptake of MNPs by the interaction of particle surfaces with biomolecules. Here, we quantitatively analyze theintracellular uptakes of 30 nm Fe- and Mn-ferrite MNPs. We confirm that the magnetic properties of MNPs change accordingto their microstructure and quantitatively analyze nanoparticle internalization in breast cell lines (MCF10A, MCF7, andMDA-MB-231) by measuring the magnetic moment using a vibrating sample magnetometer. Finally, we examine the effectof nanoparticle microstructure on cellular uptake in terms of the interaction between the nanoparticles and biomolecules.

인식 단위로서의 한국어 음절에 대한 연구

김유진,김회린,정재호,Kim, Yu-Jin,Kim, Hoi-Rin,Chung, Jae-Ho 한국음향학회 1997 韓國音響學會誌 Vol.16 No.3

본 논문에서는 한국어 대용량 어휘 인식 시스템에 적합한 인식 단위에 대하여 연구 및 실험하였다. 특히 현재 인식 시스템의 인식 단위로 주로 사용되는 음소와 한국어의 특징을 잘 나타내는 음절을 선택하고, 인식 실험을 통해 음절이 한국어 인식 시스템의 인식 단위로서 적합한가를 음소와 비교하였다. 객관적인 비교 인식 실험 결과를 제시하기 위하여 동일한 남성 화자의 음성 데이터를 수집하고, 수작업 음소 경계 및 레이블링 과정을 거친 음성 데이터 베이스를 구축하였다. 또한 각 인식 단위에 동일한 HMM 기반의 훈련 및 인식 알고리즘을 적용하기 위해 Entropic사의 HTK (HMM Tool Kit) 2.0을 사용하였다. 각 인식 단위의 훈련을 위해 5상태 3출력, 8상태 6출력 HMM 모델의 연속 HMM (Continuous HMM)을 적용하였고, PBW 3회분, POW 1회분을 훈련에 사용하고 PBW 1회분을 각 인식 단위로서 인식하는 화자 종속 단어 인식 실험을 구성하였다. 실험 결과 8상태 6출력 모델을 사용한 경우 음소 단위는 95.65%, 음절 단위는 94.41%의 인식률을 나타내었다. 한편 인식 속도에서는 음절이 음소보다 약 25% 빠른 것으로 나타났다. In this paper, study and experiments are performed for finding recognition unit fit which can be used in large vocabulary recognition system. Specifically, a phoneme that is currently used as recognition unit and a syllable in which Korean is well characterized are selected. From comparisons of recognition experiments, the study is performed whether a syllable can be considered as recognition unit of Korean recognition system. For report of an objective result of the comparison experiment, we collected speech data of a male speaker and processed them by hand-segmentation for phoneme boundary and labeling to construct speech database. And for training and recognition based on HMM, we used HTK (HMM Tool Kit) 2.0 of commercial tool from Entropic Co. to experiment in same condition. We applied two HMM model topologies, 3 emitting state of 5 state and 6 emitting state of 8 state, in Continuous HMM on training of each recognition unit. We also used 3 sets of PBW (Phonetically Balanced Words) and 1 set of POW(Phonetically Optimized Words) for training and another 1 set of PBW for recognition, that is "Speaker Dependent Medium Vocabulary Size Recognition." Experiments result reports that recognition rate is 95.65% in phoneme unit, 94.41% in syllable unit and decoding time of recognition in syllable unit is faster by 25% than in phoneme.

3D 프린터 용 PLA/LDPE 고분자 블렌드 모노필라멘트

김유진,최혜미,신동수,김규식,장순호,오태환,Kim, Yu Jin,Choi, Hye Mi,Shin, Dong Soo,Kim, Gyu Sik,Jang, Soon Ho,Oh, Tae Hwan 한국섬유공학회 2018 한국섬유공학회지 Vol.55 No.3

In this study, the effects of a compatibilizer and the blend ratio of low-density polyethylene (LDPE) on the 3D printability of polylactic acid (PLA)/LDPE monofilaments were investigated. Two kinds of PLA and LDPE with different melt indices (MI) were selected for the PLA/LDPE blend monofilaments. An ethylene/butyl acrylate/glycidyl methacrylate terpolymer, having affinities for both PLA and LDPE, was used as a compatibilizer. The tensile strength of the PLA/LDPE monofilaments decreased with increasing amounts of LDPE. PLA with a lower MI of 6 showed better printability than PLA with higher MIs of 15-30, due to its higher viscosity. When the compatibilizer was added, the compatibility and 3D printability increased. The printability increased when the compatibilizer was added up to 20 wt.%, but decreased when LDPE was added at over 30 wt.%.

High Frequency of Plant Regeneration through Cyclic Secondary Somatic Embryogenesis in Korean ginseng

김유진,Ok Ran Lee,Kyung Tack Kim,Deok Chun Yang 고려인삼학회 2012 Journal of Ginseng Research Vol.36 No.4

Somatic embryogenesis is one of good examples of the basic research for plant embryo development as well as an important technique for plant biotechnology such as medicinally important plants. Single embryos develop into normal plantlets with shoots and roots. Therefore, direct single embryogenesis derived from single cells is highly important for normal plant regeneration. Here we demonstrate that the cyclic secondary somatic embryogenesis in Panax ginseng Meyer is a permanent source of embryogenic material that can be used for genetic manipulations. Secondary somatic embryos were originated directly from the primary somatic embryos on hormone-free Murashige and Skoog medium, and proliferated further in a cyclic manner. EM medium (one third of modified MS medium [MS medium containing half amount of NH4NO3 and KNO3] with 2% to 3% sucrose) favored further development of proliferated secondary somatic embryos into plantlets with root system. The plantlets developed into plants with well-developed taproots in half-strength Schenk and Hildebrandt basal medium supplemented with 0.5% activated charcoal.