쉐마와 족보의 관계 연구

윤사무엘 ( Samuel Yun ) 쉐마교육학회 2010 인성과 쉐마 Vol.1 No.2

성경의 족보에 나타난 쉐마 교육을 살펴 봄으로 쉐마 학파의 근거를 찾으려 한다. 현용수 박사의 구약의 지상명령(창18:19- 아브라함에게 주신 하나님의 말씀으로 자녀의 신앙교육 백서) 은 신약의 지상명령(마28:18-20 - 온 족속으로 가서 예수님께서 분부하신 것을 가르쳐 지키는 교육 선교)와 대비시킨 점은 놀라운 학문적 발견이다. 기독교 교육학과 성경신학을 접목시키는 쉐마교육은 이미 세계 신학계에 소개되어 정평 있는 학자들의 관심을 끌고 있는 이 시점에 쉐마학파의 태동은 환영할 만 일이다. 본고에서는 성경에 나오는 족보에 나타난 쉐마 교육의 중요성과 관련성을 드러내고 있다. I would like to find the foundation of Shema school through researching Shema education found in the Bible genealogy. It is a great scholastic discovery of Dr. Hyun`s to make a comparison between the great commission of Old Testament(Gen. 18:19 - the education of children which God has given to Abraham) and the great commission of New Testament(Matt. 28:18- 20 - the education of mission which Jesus Christ has given to his people). It is a great welcome to see forthcoming activities of Shema School since Shema Education, that grafts Christian pedagogy and Biblical theology, has been introduced to, and is attracting the attention of global scholars. In this dissertation, I have mentioned the significances of Shema education in Bible genealogy).

현용수 쉐마학파의 기초와 발전

윤사무엘 ( Yun Samuel ) 쉐마교육학회 2010 인성과 쉐마 Vol.1 No.1

쉐마교육학회의 출범과 함께 쉐마학파의 정립을 위해 지식사회학적 관점에서 몇가지 제안을 해 보고 싶다. 학회가 지속적으로 발전하려면 다양한 계층에서 받아들일 수 있도록 쉐마학파의 이론이 정립되어야 한다. 정당성이 되려면 외형화(externalization) → 객관화(objectivation) → 내면화(internalization)의 과정을 거치면 쉐마학파의 기본구조(개연성, infrastructure=plausibility structure)가 든든히 구축된다는 이론이다. 성서학에서 신명기학파, 역대기학파, 이사야학파, 지혜학교 등이 있듯이, 학파의 이론은 중심 주제가 있어야 하고, 이 주제가 학계의 검증을 거쳐 한 이론으로 정립되기 위해 정당성의 과정을 거쳐야 하는 것이다. I would like to put forward some proposals for the establishment of Shema school and Shema education society on perspective of an academic society. For the society to develop, Shema theory must be established in a way that various class of people can understand and accept. For legitimacy, the theory is that through the process of externalization → objectivation → internalization, the basic structure(infrastructure = plausibility structure) of Shema school will be firmly established. Just as there are Deuteronomistic school, Chronicler`s school, Isaianic School, Prophet School, Wisdom school in The Biblical theology, the philosophy of the school should be the main theme and in order for this theme to be established as a theory after receiving academic inspection, it must go through the process of legitimacy.

High-performance supercapacitors using flexible and freestanding MnO_x/carbamide carbon nanofibers

Samuel, Edmund,Jo, Hong Seok,Joshi, Bhavana,Park, Hyun Goo,Kim, Yong Il,An, Seongpil,Swihart, Mark T.,Yun, Je Moon,Kim, Kwang Ho,Yoon, Sam S. Elsevier 2017 APPLIED SURFACE SCIENCE - Vol.423 No.-

<P><B>Abstract</B></P> <P>We demonstrate the fabrication of a MnO<I> <SUB>x</SUB> </I>/carbamide carbon nanofiber (CCNF) composite consisting of MnO particles embedded in CCNFs as a highly flexible and freestanding electrode material for supercapacitors. A sacrificial polymer component, polymethylmethacrylate, included in the precursor solution, pyrolyzes during heating, resulting in pores in the fibers, some of which are filled by the MnO nanocrystals. Carbamide is added to control the size of the MnO<I> <SUB>x</SUB> </I> particles as well as to increase the carbon content of the composite and hence its conductivity. The X-ray diffraction and Raman spectra of the composite show that the MnO particles formed have low crystallinity. Transmission electron microscopy confirms that the MnO particles are distributed very uniformly over the CCNFs. Symmetric supercapacitors constructed using electrodes of this composite exhibit specific capacitances of 498F∙g<SUP>−1</SUP> at a scan rate of 10mV∙s<SUP>−1</SUP> and 271F∙g<SUP>−1</SUP> at a current density of 1A∙g<SUP>−1</SUP>. They also exhibit excellent long-term cycling performance, retaining 93% of their initial capacity after 5000 cycles of galvanostatic charging/discharging.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We successfully fabricated a novel flexible MnO/CCNF composite. </LI> <LI> Flexible MnO/CCNF showed excellent retention (93%) after 5000 cycles at 1Ag<SUP>−1</SUP>. </LI> <LI> MnO/CCNF composite demonstrated specific capacitance of 498Fg<SUP>−1</SUP> at a scan rate of 10mVs<SUP>−1</SUP>. </LI> <LI> Dynamic MnO particle formation controlled by using carbamide. </LI> </UL> </P>

Comparison of the anti-inflammatory effects of induced pluripotent stem cell-derived and bone marrow-derived mesenchymal stromal cells in a murine model of corneal injury

Yun, Young In,Park, Se Yeon,Lee, Hyun Ju,Ko, Jung Hwa,Kim, Mee Kum,Wee, Won Ryang,Reger, Roxanne L.,Gregory, Carl A.,Choi, Hosoon,Fulcher, Samuel F.,Prockop, Darwin J.,Oh, Joo Youn Elsevier 2017 cytotherapy Vol.19 No.1

<P>Background aims. Mesenchymal stromal cells (MSCs) offer tremendous potential for therapeutic applications for inflammatory diseases. However, tissue-derived MSCs, such as bone marrow derived MSCs (BM-MSCs), have considerable donor variations and limited expandability. It was recently demonstrated that MSCs derived from induced pluripotent stem cells (iPSC-MSCs) have less pro-tumor potential and greater expandability of homogenous cell population. In this study, we investigated the anti-inflammatory effects and mechanism of iPSC-MSCs in a murine model of chemical and mechanical injury to the cornea and compared the effects with those of BM-MSCs. Methods. To create an injury, ethanol was applied to the corneal surface in mice, and the corneal epithelium was removed with a blade. Immediately after injury, mice received an intravenous injection of (i) iPSC-MSCs, (ii) BM-MSCs or (iii) vehicle. Clinical, histological and molecular assays were performed in the cornea to evaluate inflammation. Results. We found that corneal opacity was significantly reduced by iPSC-MSCs or BM-MSCs. Histological examination revealed that the swelling and inflammatory infiltration in the cornea were markedly decreased in mice treated with iPSC-MSCs or BM-MSCs. Corneal levels of tumor necrosis factor (TNF)-alpha, interleukin (IL)-1 beta and IL-6 were lower in iPSC-MSC- and BM-MSC-treated mice, compared with vehicle-treated controls. In contrast, iPSC-MSCs with a knockdown of the TNF-alpha stimulating gene (TSG)-6 did not suppress the levels of inflammatory cytokines and failed to reduce corneal opacity. Conclusions. Together these data demonstrate that iPSC-MSCs exert therapeutic effects in the cornea by reducing inflammation in part through the expression of TSG-6, and the effects are similar to those seen with BM-MSCs.</P>

Carbon nanofibers decorated with FeO<i> _x </i> nanoparticles as a flexible electrode material for symmetric supercapacitors

Samuel, Edmund,Joshi, Bhavana,Jo, Hong Seok,Kim, Yong Il,An, Seongpil,Swihart, Mark T.,Yun, Je Moon,Kim, Kwang Ho,Yoon, Sam S. Elsevier 2017 Chemical Engineering Journal Vol. No.

<P><B>Abstract</B></P> <P>We have produced flexible, freestanding, and light weight mats of FeO<I> <SUB>x</SUB> </I>-decorated carbon nanofibers (CNFs) and demonstrated their use in supercapacitors with high energy and power density and excellent long term capacitance retention. Highly flexible carbon-iron oxide nanofibers were synthesized by electrospinning a solution of polyacrylonitrile (PAN), polymethylmethacrylate (PMMA), and iron acetylacetonate (FeAcAc), followed by annealing to carbonize the PAN, pyrolyze the PMMA to produce pores, and convert FeAcAc to FeO nanoparticles. The morphology of the FeO<I> <SUB>x</SUB> </I>/CNF composite was determined by scanning and transmission electron microscopies, which showed that the embedded FeO<I> <SUB>x</SUB> </I> nanoparticles were well distributed in the CNF electrode. We employed cyclic voltammetry, galvanostatic charge/discharge measurements, and electrochemical impedance spectroscopy to evaluate the electrochemical performance of symmetric supercapacitors prepared from the FeO<I> <SUB>x</SUB> </I>/CNF composite. The supercapacitors exhibited high specific capacitance (427F·g<SUP>−1</SUP> at 10mV·s<SUP>−1</SUP> and 436F·g<SUP>−1</SUP> at 1A·g<SUP>−1</SUP> in the optimal case) and good stability, retaining 89% of their initial capacitance after 5000 cycles at a current density of 1A·g<SUP>−1</SUP>. The optimal device achieved an energy density of 167Wh·kg<SUP>−1</SUP> at a power density of 0.75kW·kg<SUP>−1</SUP>, and an energy density of 66Wh·kg<SUP>−1</SUP> at a power density of 7.5kW·kg<SUP>−1</SUP>. These combinations of energy and power densities can meet the needs of many emerging supercapacitor applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Highly flexible FeO<SUB>x</SUB>-carbon nanocomposite nanofibers were fabricated. </LI> <LI> Freestanding FeO<I> <SUB>x</SUB> </I>-CNF showed excellent retention (89%) after 5000 cycles at 1A·g<SUP>−1</SUP>. </LI> <LI> A FeO<SUB>x</SUB>/CNF-based supercapacitor provides 436F·g<SUP>−1</SUP> of capacitance at 1A·g<SUP>−1</SUP>. </LI> <LI> Excellent uniform decoration of CNF with FeO<SUB>x</SUB> was demonstrated. </LI> </UL> </P>

Digitization of Greenhouse Tomato Phenotypes Predicts Yield as Affected by the Radiation-temperature Ratio during Three Cultivation Seasons

Samuel Yeboah,Ji Hye Yoo,Yun-Hee Shin,Jean Nepo Ndikumana,Un Seok Lee,Hyoung Seok Kim 한국원예학회 2023 한국원예학회 학술발표요지 Vol.2023 No.5

Flexible and freestanding core-shell SnO_<i>x</i>/carbon nanofiber mats for high-performance supercapacitors

Samuel, Edmund,Joshi, Bhavana,Jo, Hong Seok,Kim, Yong Il,Swihart, Mark T.,Yun, Je Moon,Kim, Kwang Ho,Yoon, Sam S. ELSEVIER SCIENCE 2017 JOURNAL OF ALLOYS AND COMPOUNDS Vol.728 No.-

<P><B>Abstract</B></P> <P>We demonstrate the fabrication of core-shell SnO<SUB> <I>x</I> </SUB>/carbon nanofiber (CNF) composite mats via single-nozzle one-step electrospinning for use as flexible freestanding electrodes in supercapacitors. The freestanding and flexible nature of the composites is essential for their use in lightweight, portable, and foldable electronic devices and eliminates the need for a separate current collector. We fully characterized the structural and morphological properties of the SnO<SUB> <I>x</I> </SUB>/CNF mats and optimized the SnO<SUB> <I>x</I> </SUB> to CNF precursor ratio. The optimized SnO<SUB> <I>x</I> </SUB>/CNF-based symmetric supercapacitor exhibited a capacitance of 289 F·g<SUP>−1</SUP> at a scan rate of 10 mV·s<SUP>−1</SUP>. Moreover, it retained more than 88% of its initial capacitance after 5000 cycles, highlighting the long-term stability of supercapacitors based on these SnO<SUB> <I>x</I> </SUB>/CNF mats.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A core-shell-structured SnO<SUB>x</SUB>/CNF composite mat electrodes were synthesized by single-nozzle-electrospinning. </LI> <LI> The core-shell composite is highly flexible and freestanding. </LI> <LI> Capacitors using these electrodes had specific capacitance of up to 289 F·g<SUP>−1</SUP> at a scan rate of 10 mV·s<SUP>−1</SUP>. </LI> <LI> Specific capacitance at a current density of 100 mA·g<SUP>−1</SUP> reached 273 F·g<SUP>−1</SUP>. </LI> </UL> </P>

혈액에서 혐기성 세균이 분리된 환자의 임상 및 세균학적 검토

정윤섭,이삼열,김진주 대한미생물학회 1985 大韓微生物學會誌 Vol.20 No.1

Isolation and identification of anaerabic bacteria fmm blood cultures are still technically demanding procedures. Recently, with thq use of gas hquid chmmatogWphy, the accuracy of identification is much improved, However, there has niver been a satisfactory data apalysis on anaerobic bacteremia in Korea. The authors evaluateid both the chnical and the bacteriological 4ata of 129 anaerobic bacteremias found at the Yonsei Medidal Center during the period of 1973 to 1984. The most frequently isolated anaerobic bacteria were Bacteroides (52.7%), among which the major spjcies was B. fragilis (38.7%) . Incidence of anae- robic bacterethia by sex was 57% in male and 43% in female. Mortality was high in groups below 1-year old and abom 50-year old. The cause of death seemed qlosely correlated with the patients age, general condition and the s!.verity of the underlying disease. Various neoplasms were the most common (20%) un- derlying disesses pxedisposing the anaerobic bacteremia. Biliary tract was considered the most frequent route of infection in anaetobic bacteremia. The frequent clinic8l signs in anaerobic bactetemia were fever (65%), followed by liver function abnormality (29%), jaundice (20%) and hypotention (18%) . When analysis of positive rate,of blood cutture was made on the patients from whom 4 cultures were done within 24 houm. It was found that 33% of the samples were positive. Isolation rate of anaembic bacteria in thioglycollate medium was 83.8%, while it was 44% in Tryptic soy broth. Among the anaerobic bacteremia, 25.4% were polymicrobia1 infections with aerobic bacteria (92.5%), such as E. Coli(33.3%). From these studies, it is con- cluded that h. fragilis is the most important causative organism in anaerobic bacteremia, with high fatality, particularly ih those who have underlying diseases. The ports of entry me mainly biliary, gastrointestinal and fernale genital traet. Fever is the most frequent clinical sign. Single blood culture is not sufficient to detect all anaerobic bacteremia, therefore more cultures with optimal time interval are needed. The incidence of polymicrohial infection in anaerobic bacteremia is higher than that in overall bacteremia.

Adaptive Step-Size Control for Dynamic Relaxation Using Continuous Kinetic Damping

Jung, Samuel,Kim, Tae-Yun,Yoo, Wan-Suk Hindawi Limited 2018 Mathematical problems in engineering Vol.2018 No.-

<P>Dynamic relaxation (DR) is a widely used numerical method to determine the static equilibrium of a dynamic system. However, it is difficult to apply conventional DR methods to nonlinear models because they require estimation of a stiffness matrix of the model. To resolve the forementioned problem, a new dynamic relaxation method using continuous kinetic damping (CKDR) was proposed in previous research. The CKDR method does not require any model parameters including the stiffness matrix, and it possesses absolute stability and a second-order convergence rate. However, the convergence rate is proportional to square of the step size, and this may result in a low convergence rate if the selected step size is excessively small. This problem leads to difficulties in the practical use of CKDR. Thus, an adaptive step-size method is proposed in this paper to control the convergence rate of CKDR. The proposed method estimates natural frequency of the model and determines adaptive step size. Static equilibrium simulations were performed for three different models to verify the method. The results revealed that the computational cost of CKDR with a variable step size was very efficient when compared to fixed step sizes and that the convergence rate was also controlled as intended. In addition, the lowest natural frequencies of models in static equilibrium were accurately estimated.</P>

결합 인덕터 방식을 이용한 고승압 인터리브 DC-DC 컨버터에 관한 연구

이사무엘(Samuel Lee),김용(Yong Kim),서상화(Sang-Wha Seo),배진용(Jin-Yong Bae),윤홍민(Hong-Min Yun),엄태민(Tae-Min Eom) 대한전기학회 2017 대한전기학회 학술대회 논문집 Vol.2017 No.7