http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
기술 교육에 있어서 학습 장소에 따른 교수 방법의 효율성에 관한 이론적 고찰
권현진,류창열 충남대학교 공업교육연구소 2000 論文集 Vol.23 No.1
This study is to find the effective ways of achieving learning goals by applying appropriate teaching methods in various learning conditions. The study areas are as follows: 1. surveying various characteristics in accordance to the learning places which affect teaching methods, 2. investigating teaching methods suitable to the industrial education and workplaces, 3. researching the teaching method of the school in detail. This study is adopted literature review and analytic research in order to obtain the object. The major findings of this study are as follows: 1. The learning place can be divided into the workplace and school because of the characteristic of technology education. We should try to use these places effectively. 2. In the workplace, several teaching methods like as work observation, general work experience program, work-study, cooperative education system, internship are applied to general education and vocational education 3. Teaching methods of school are classified with the specific property of learning contents, the learning purpose, the ability of student and so on.
Jeon, Hyunjin,Lee, Euiyeon,Kim, Dahee,Lee, Minhyung,Ryu, Jeahee,Kang, Chungwon,Kim, Soyoun,Kwon, Youngeun American Chemical Society 2018 ANALYTICAL CHEMISTRY - Vol.90 No.16
<P>Live-cell-based biosensors have emerged as a useful tool for biotechnology and chemical biology. Genetically encoded sensor cells often use bimolecular fluorescence complementation or fluorescence resonance energy transfer to build a reporter unit that suffers from nonspecific signal activation at high concentrations. Here, we designed genetically encoded sensor cells that can report the presence of biologically active molecules via fluorescence-translocation based on split intein-mediated conditional protein trans-splicing (PTS) and conditional protein trans-cleavage (PTC) reactions. In this work, the target molecules or the external stimuli activated intein-mediated reactions, which resulted in activation of the fluorophore-conjugated signal peptide. This approach fully valued the bond-making and bond-breaking features of intein-mediated reactions in sensor construction and thus eliminated the interference of false-positive signals resulting from the mere binding of fragmented reporters. We could also avoid the necessity of designing split reporters to refold into active structures upon reconstitution. These live-cell-based sensors were able to detect biologically active signaling molecules, such as Ca<SUP>2+</SUP> and cortisol, as well as relevant biological stimuli, such as histamine-induced Ca<SUP>2+</SUP> stimuli and the glucocorticoid receptor agonist, dexamethasone. These live-cell-based sensing systems hold large potential for applications such as drug screening and toxicology studies, which require functional information about targets.</P> [FIG OMISSION]</BR>
안현진(Hyunjin Ahn),손병찬(Byung Chan Son),류현식(Hyunsik Ryu),이옥구(Ockgoo Lee) 한국전자파학회 2020 한국전자파학회논문지 Vol.31 No.11
본 논문에서는 임피던스 변환율을 개선하기 위한 병렬 분할된 CMOS 점증 단권변압기를 제안한다. 또한, 이에 상응하는 확장성이 있는 CMOS 공정을 사용한 병렬 분할 기법을 사용한 모델링이 개발되었다. 제안된 병렬 분할 기법의 모델링을 사용하여 병렬 분할된 단권변압기의 정확한 성능 예측이 가능하다. 병렬 분할된 점증 단권변압기는 표준 CMOS 65 ㎚ 공정을 사용하여 제작되었다. 모델링된 결과는 측정된 결과와 우수한 일치를 보여준다. 제작된 1개/2개 병렬 분할된 CMOS 점증 단권변압기는 3 ㎓ 주파수에서 −1.21 ㏈/−1.54 ㏈의 최소삽입손실의 특성을 보이며, 50 Ω 임피던스가 9.5 Ω/6.1 Ω의 임피던스로 변환되어 보인다. In this study, a parallel-segmented complementary metal-oxide–semiconductor (CMOS) step-up autotransformer was developed to improve the impedance transformation ratio. In addition, a corresponding scalable segmentation-based model was developed on a CMOS case. The proposed segmentation-based model was used to predict the accurate performance of a parallel-segmented autotransformer. The parallel-segmented step-up autotransformer was fabricated through a standard 65 ㎚ CMOS process. The modeled results showed good agreement with the measured results. The implemented one/two parallel-segmented CMOS step-up autotransformer changed the impedance from 50 Ω to 9.5 Ω/6.1 Ω with −1.21 ㏈/−1.54 ㏈ minimum insertion loss at 3 ㎓.
톳 열수 추출물이 마우스 비장세포 증식증과 염증성 사이토카인 (IL-1β, IL-6, TNF-α) 분비에 미치는 영향
박현진(Hyunjin Park),류혜숙(HyeSook Ryu) 한국식품영양과학회 2013 한국식품영양과학회지 Vol.42 No.12
Hizikia fusiforme (seaweed fusiforme) has long been used as a food source mainly in Korea and Japan. This study was performed to evaluate the immunomodulative effects of Hizikia fusiforme in mice. Hizikia fusiforme water extracts (0, 50, and 500 mg/kg b.w.) were orally administrated into the mice every other day, for four weeks. The proliferation of splenocytes, as well as the levels of proinflammatory cytokines (IL-1β, IL-6, and TNF-α) secreted by activated macrophages were measured. Splenocyte proliferation was enhanced in the experimental groups compared to that of the control group. Also, the mice with Hizikia fusiforme water extracts supplementation in both concentrations showed increased levels of cytokine production by activated peritoneal macrophages compared to those in the control group. The highest levels of cytokine (IL-1β, IL-6, TNF-α) production were observed in the 50 mg/kg b.w. supplementation group stimulated by LPS for all three cytokines. The results of this study showed that the supplementation of Hizikia fusiforme water extracts may enhance the immune function by regulating the splenocytes proliferation and the cytokine production by activated macrophages. Further studies are needed to identify the stimulative and immunomodulating components of Hizikia fusiforme.