A Study on the Functionality of Halophytes from Coast area of Jeollanam-do

Tae-Man Ha,Yang-Joon An,Mi-Yeong Shin,Sook Park,Hak-Jae Park,Hyo-Jeong Kang,Su-Jeong Choi,Jae-Yeong Yu,Ji-Yun Jeon,Gyu-Yeon Oh 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10

This study was undertaken to improve the perceived value of halophytes and contribute to the activity of the local economy by analyzing the antioxidant activity and mineral content of Suaeda japonica, Tetragonia tetragonoides, and Spergularia marina that grow wild on the mud flats and coastal areas. The total phenolic compound content found in each order is as follows: Suaeda japonica (3.674∼5.989 mg TAE/g dry wt.), Tetragonia tetragonoides (2.515∼4.471 mg TAE/g dry wt.), and Spergularia marina (2.450∼4.067 mg TAE/g dry wt.); DPPH radical scavenging and ABTS cation radical scavenging activities were also recorded in the same order. In the case of minerals, Iron(Fe) was relatively high in Suaeda japonica (960.1∼1,346.7 mg/kg), Manganese(Mn) in Tetragonia tetragonoides (197.1∼574.8 mg/kg), and Zinc(Zn) was relatively high in Spergularia marina (63.19∼216.56 mg/kg). It was confirmed that the mineral content of Suaeda japonica, Tetragonia tetragonoides, and Spergularia marina was significantly higher than that of Chinese cabbage, lettuce, leek, and spinach.

Korean English Teacher's Disempowerment in English-only Classes

Sung-Sam Hwang,Hyo-Sun Seo,Tae-Young Kim 한국사회언어학회 2010 사회언어학 Vol.18 No.1

Hwang, Sung-Sam, SeD, Hyo-Sun, Kim, Tae-Young. 2010. Korean English Teacher's Disempowerment in English-only Classes: A Case Study Focusing on Korea-specific Cultural Aspects. The Sociolinguistic journal of Korea 18(1). In this case study, we have focused on the disempowerment of a Korean English teacher (KET) in English-only classrooms. Six English as a foreign language (EFL) classrooms in a Korean high school were observed and analyzed by using interpretive discourse analysis. Out of the six classes, three representative classrooms were both video- and audio-taped. The results show that the English-only classes could weaken the KETs' power via three mechanisms: (a) calling the KETs' last name for choral greetings at the beginning of the class, (b) students' group solidarity and peer pressure between classmates, and (c) the students' excessively collaborative approach to peer assistance. It is argued that the exclusive English-only instruction disempowers the KETs' status and dismantles their vocational identity. In order to remedy the current situation, within a scaffolding supported by the eclectic use of first language where necessary for effective class management, KETs are empowered and overcome constraints imposed by the limited L2 oral competence of some non-native English teachers.

대한민국 자동차 번호판에서 블록 이진화 기법을 이용한 문자 인식 기법

장인태, 이슬기, 우효정, 안재형 충북대학교 컴퓨터정보통신연구소 2012 컴퓨터정보통신연구 Vol.20 No.1

In this paper, the image binarization method using standard specifications of the vehicle license plate to recognize characters on the plates is proposed. The global binarization method that had a threshold over entire image pixels cannot acuratelly binarize in case that local average brightness are varied to each plates characters regions. The proposed method uses the characters regions in the standard specifications of the korean vehicle license plates as binarization blocks. For installed cameras on national roads and parking areas, the computer simulation results showed average characters recognition rate about 5% higher than the otzu global binarization method.

기저세포암, 피부전이암과 유사한 조직소견을 보인 안검 외 피지선암 1예

김상태,노효진,서기석 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.1

Backgroud : Extraocular sebaceous carcinoma is a malignant tumor derived from the adnexal epithelium of sebaceous glands. A poorly differentiated sebaceous carcinoma shows variable histopathologic findings and mimics other primary tumor and cutaneous metastases mostly composed of clear cells. Case : Our patient consultation was requested for a 53 year?old female with solitary mild painful tumor on the scalp. The first histopathlogic impression of this case was basal cell carcinoma on the other hospital. After reevaluation, our diagnosis is not basal cell carcinoma but extraocular sebaceous carcinoma. Conclusion : A thorough exact recognition of characteristic histopathologic features of extraocular sebaceous carcinoma is necessary for making diagnosis, treatment plan and determining the prognosis.

멀티미디어를 이용한 실용영어 교육

백태효 대구산업정보대학 2001 논문집 Vol.15 No.-

The purpose of this study is to suggest a new method of multimedia assisted practical English teaching at the junior college level to improve students' listening and speaking abilities. Computer technology now has a significant impact on almost every aspect of our lives and it continues to extend its applications to business, entertainment, research, instruction in school, and so on. What concerns us here, in particular, has been the application in the field of English education. The application of computer technology has been recently dubbed as 'computer-assisted language learning' (CALL), which is one of the sophisticated ways to facilitate language learning in that it enables computer users to interact with computers. Interactivity in question renders multimedia proponents to consider the notion of multimedia in a somewhat different way. As its name suggests, multimedia was widely described as something that simply combines the capabilities of technologies that used to be separate such as plain text, sound, still graphic images, motion graphics, and so on. In fact computer technology has dramatically changed language teaching and learning. It is becoming an exciting experience for language learners as well as teachers. They can understand real language used in the real world far removed from a student's own reality, which takes them beyond the confines of their own learning boundaries. This is the reason why we suggest the multimedia aided teaching method

주파수 도약 대역 확산 통신 방식의 동기 시스템 구현에 관한 연구

方孝昌,權智洪,張太和,金元厚 한국항공대학교 1992 論文集 Vol.30 No.-

주파수 도약 대역 확산 통신 방식에서 기존의 동기 시스템은 VCO의 비선형 특성, 루프의 온도보상문제, 소형화. 경량화 문제 등으로 시스템 구현에 많은 어려움을 겪고 있었다. 본 연구에서는 정합필터(matched filter)를 이용한 초기동기와 ADPLL(All Digital Phase Locked Loop)을 이용한 동기 추적 방식의 동기 시스템을 구현하였고, 초기동기시간 약 600μS, 동기추적에 약46mS의 시간을 얻어 전체 동기 시스템은 약 65mS이내를 얻었다. 일반적으로 동기시간이 100mS 이내에 이루어지면 완전한 동기를 이룬것으로 보며, 따라서 구현된 동기 시스템이 매우 안정되고 정확한 동기를 이루고 있음을 알 수 있었다. In the frequency hopping spread spectrum communication, the conventional synchronization systems have many problems in their implementation. It is nonlinear characteristics of VCO, temperature compensation of loop and implementing compactly. In this paper, we implemented the synchronization system which consists of the ACQUISITION by matched filter and the TRACKING by ADPLL(All Digital PLL). In this synchronization system, acquisition time and tracking time were about 600㎲, 64ms respectively, so that total synchronization time could be within 65ms. Generally, as synchronization time is within 100ms we can regard it as complete synchronization. therefore, we could prove that the implemented synronization system has a stable and accurate synchronization.

그람양성구균에 대한 Teicoplanin과 Vancomycin의 시험관내 항균력

최태열,김경숙,전용관,서일혜,김정욱,이웅수,안정열,김홍석,정재용,최효선,김덕언,유진우 대한감염학회 1994 감염 Vol.26 No.1

An increasing frequency of methicillin resistant S. aureus(MRSA), methicillin resistant coagulase negative staphylococci(MRCNS) and Enterococcal infection have been observed in recent years. Teicoplanin is a new glycopeptide antibiotic obstained from the Actinoplanes teicomycetius. The molecular structure and spectrum of antimicrobial activity of teicoplanin is simillar to those of vancomycin, and has been reported to have an excellent in vitro and in vivo effect against various gram-positive infections. Therefore, we evaluated the in vitor susceptibility of gram positive cocci, such as, S. aureus, coagulase negative Staphylococci(CNS), and Enterococci to teicoplanin and vancomycin. The total 253 strains consisted of MSSA(40), MRSA(53), MSCNS(47), MRCNS(48), and Enterococci(65). They were assayed by disc diffusion and agar dilution. During the study, 57% of S. aureus and 49% of CNS showed resistance to methicillin. The inhibitory diameter of teicoplanin was 15-20mm in MSSA, 12-19mm in MRSA, 13-24mm in MSCNS, 11-23mm in MRCNS, and 15-22mm in Enterococci respectively, and showed sensitivity in all but 8 strains(3.2%). The range of the minimum inhibitory concentration (MIC) of teicoplanin to MSSA, MRSA, MSCNS, MRCNS and Enterococci were 9.12-2.0㎍/ml, 0.25-2.0㎍/ml, & 0.25-32㎍/ml, 0.12-1.0㎍/ml respectively. One case of S. haemolyticus was resistant to teicoplanin (32㎍/ml) by the agar dilution method. Eight minor (3.2%) and one major(0.4%) error was observed when the MIC and disk diffusion data were correlated with teicoplanin. As for vancomycin the inhibitory diameter was 17-21mm in MSSA, 15-21mm in MRSA, 18-26mm in MSCNS, 18-25mm in MRCNS, and 16-22mm in Enterococci respectively. The range of the MIC of vancomycin to MSSA, MRSA, MSCNS, MRCNS, and Enterococci were 0.25-1.0㎍/ml, 0.25-4.0㎍/ml, 0.5-2.0㎍/ml and 0.5-2.0㎍/ml respectively. One minor error (0.4%) was seen with the vancomycin disk. The MIC90 of MSSA and MRSA exhibited the same results in teicoplanin (1.0㎍/ml, 1.0㎍/ml), and vancomycin(2.0㎍/ml, 2.0㎍/ml). MSCNS and MRCNS exhibited greater MIC90 with teicoplanin(4.0㎍/ml, 8.0㎍/ml) than vancomycin(2.0㎍/ml, 2.0㎍/ml). Incontrase Enterococci were more susceptible to teicoplanin(0.5㎍/ml) than to vancomucin (2.0㎍/ml). Results from this analysis indicated that both teicoplanin and vancomycin were very excellent for gram positive infections, especially those resistant to methicillin.

실험적 급성 심근경색증 후 좌심실 재성형에 관여하는 간질 조직의 변화에 대한 전환효소억제제의 기전에 대한 연구 : 백서의 非痛璧性 심근경색 후 좌심실 재성형 및 Transforming Grawth Factor β-1의 발현 변화와 이에 대한 레닌 안지오텐신계 차단제의 효과 분석 Effects on Transforming Growth Factor - β-1 Expression

연태진,김석연,김효수,김어진,김소영,정은주,서정욱,오병희 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.9

경량 고강도 Mg-Zn계합금의 조직과 내식성에 관한 연구

안효준,남태현,임수근,안인섭,허보영,김기원 慶尙大學校 1995 論文集 Vol.34 No.1

The purpose in this study is to develope of high strength and corrosion reistant Mg-Zn system alloys by controlling microstructures and by adding of Cu elements. To produce optimum tesile strength,it is imperative to obtain effective grain refinment during casting. Optimal condition for grain size refining effect was obtained at the minmum composotion of 2wt% Cu or 1.5wt%So addition to Mg-6wt%Zn alloy.Age hardening behavior was experimented at the optimal compositions of the Mg-6wt%Zn, Mg-6wt%Zn-2wt%Cu and Mg-6wt%Zn-1.5wt%Si. The hardeness increment due to age hardening was at the Mg-Zn-Si alloy system. The improvement of corrosion resistanece by the addition with Cu is related to and increasing Zn/Cu ration in the intermatallic particles in the Mg-Zn system.Further improvements obtained by T6 treatment are related to the properties of the Mg-Zn phase,whih acts as a corrosion barrier by precipitating along the grainboundaries.Filiform corrosion observed soon after pit initiation and cellular form of pit propagation later in chloride media are explained in terms of solid solution matrix structure and the properties of air formed oxide.The information obtained from the fundamental research work is utilized in suggesting ways of improving the corrosion resistance of commercial AZ91.

VXIbus 시스템 모듈화의 試作에 관한 연구

張太和,方孝昌,金元厚 한국항공대학교 1992 論文集 Vol.30 No.-

본 논문에서는 새로운 방식의 통합계측 시스템으로 각광받고 있는 VXIbus(VMEbus Extension for Instrumentation)시스템에 적합한 신호발생기의 모듈화방안에 관하여 연구하였다. 신호발생기의 모듈화를 위하여 우선적으로 기본적인 시스템의 사양을 결정하였으며, 이러한 사양에 따라서 신호발생기를 설계 및 제작, 실험하였다. 설계 및 제작된 신호발생기를 기본으로 신호발생기와 VXIbus controller와의 통신을 위해서 인터페이스회로를 설계하였으며, 인터페이스를 통한 신호발생기의 제어를 위하여 모듈형신호발생기의 내부동작을 규정하였다. In this paper, Modulization method of signal generator suitable for VXIbus system which make appearance before the footlights as new form of total instrumentation system is studied. For modulization of signal generator, First, Basic specification of system had been determined, and Next, according to specification, Signal generator was designed, tested and realized. Interface circuits which are based on this signal generator are designed for communication between signal generator and VXIbus controller. As signal generator is controlled by interface, internal behavior of module type signal generator is specified.