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"응급구조"란 용어의 개념에 관한 응급구조과 학생들의 의미수용변화
서경희,김학수,김진회 한국응급구조학회 2000 한국응급구조학회지 Vol.4 No.1
This is a study to evaluate the effects of the change of EMT students' acceptance on meaning "Korean style translation of EMT". The major instruments of this study were Korean Self-Analysis Acceptance Opinionnaire. This Questionnaire contains 3 items which measure students' opinions or attitudes. The data were analyzed by the path analysis - with SPSS and AMOS package program. The result are as follows: 1) Y(before admission) = 0.11X1(teaching)+0.12 X2(elder)+0.57X2(peer)+E. 2) Y(student) = 0.87X1(teaching)+0.49 X2(elder)+0.59X2(peer)+E. 3) Y(before graduation) = 0.57 X1(teaching)+0.63X2(elder)+0.73X2(peer)+E.
철근 또는 강판을 이용한 철근콘크리트 전단벽의 휨성능개선에 관한 실험연구
하기주,서수연,신종학,최민권 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
The purpose of this paper is to study retrofit methods for improving the flexural capacity of RC shear wall. Four RC shear wall specimens are designed and strengthened by using reinforcement or steel plate. Cyclic loads are applied to the specimen under constant axial force. Test result shows that the strength and ductility of specimen is improved when it is strengthened using reinforcement or steel plate. The specimen retrofitted by using steel plate shows high ductility. However the strength contribution of one is not much. It is shown that the most effective method is both to install the additional flexural reinforcement and to confine the ends of wall.
위암 환자의 복강내 투여를 위한 Activated Charcoal-Alginate Bead 제형으로부터 Mitomycin C의 용출 거동
이진호,최선웅,서중기,김동민,정경수,오정연,김진향,노승무,민병무,김용백,김창식,박근성,강대영,송규상,양준묵,조준식,정현용,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1
Locoregional recurrence is the most common type of recurrence in surgical operation of gastric adenocarcinoma, and peritoneal dissemination is one of the most difficult problems in advanced gastric adenocarcinoma treatment. Because the peritoneal cavity is the most common site of the first recurrence after gastric cancer resection, intraperitoneal chemotherapy seems a logical choice for cancer chemotherapy. In this study, Mitomycin C (MMC)-activated charcoal (CH)-alginate (ALG) beads were prepared by the mixtures of CH particles adsorbed with MMC as an anti-cancer drug and aqueous alginate solution. The alginate is recognized as biodegradable, nontoxic, and biocompatible. The release of MMC from the beads in 0.1 M Tris buffer was stable and continuous until about 1 week. The MMC-CH-ALG beads can be applied in the peritoneal cavity for intraperitoneal chemotherapy since they provide a good adhesiveness on the tissue and controlled release pattern of the drugs.
정재원,김일수,박창언,김학형,서주환,김인주,심지연 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
The development of robotic welding process is a very complex assignment because the system is affected by a number of process parameters which are very difficult to determine or predict in practice. The full automation welding has not yet been achieved partly because the mathematical model for the process parameters of a given welding task is not fully understood and quantified. Several mathematical models to control welding quality, Productivity, micro structure and weld properties in arc welding processed have been studied. However, it is not an easy task to apply them to the various practical situations because the relationship between the process parameters and the bead geometry is non-linear and also they are usually dependent on specific experimental result. Practically, it is difficult, but important to know how to establish a mathematical model that can predict the result of the actual welding process and how to select the optimum welding condition under a certain constraint. In this paper, an attempt has been made to develop an neural network model to predict the back-bead width as a function of key process parameters in the GMA (Gas Metal Arc) welding and to compare the developed models with the experimental results
박상헌,심학보,이수구,서성조 서울산업대학교 산업대학원 1992 大學院論文集 Vol.1 No.1
본 연구는 혼합 미생물을 이용한 페놀 함유폐수의 생물학적 처리에 관한 연구로서, 높은 페놀 농도에서의 이를 분해시킬 수 있는 균주를 개발하고 페널 함유폐수의 효과적인 처리를 위한 실험연구이다. 각종 공장폐수, 슬러지, 토양 등 40여종의 시료로부터 페놀 분해균을 선별하였으며, 페놀농도를 단계적으로 높여 미생물을 적응시킨 결과, 페놀농도 1,000ppm의 높은 농도에서도 잘 증식하며 페놀을 효과적으로 분해시킬 수 있었다. 혼합 미생물을 분리 동정한 결과, 우점종은Pseudomonas PI인 것으로 나타났다. 회분식 실험에서 초기 페놀농도, 균체량 및 glucose 농도 등을 변수로 실험하였느데, 페놀 분해속도는 시간에 따라 증가함을 나타내었다. 또한 페놀이 완전 제거되는데 소요되는 시간은 초기 페놀 농도에 비례하였으며, 균체 주입량에 다른 초기 MLSS농도의 대수식으로 나타낼 수 있었다. 연속식 활성 슬러지법에 의한 실험에 있어서, 본 실험조건에서 페놀이 완전 제거되는데 필요한 반응기내의 체류시간은 유입 페놀농도 500ppm인 경우 20시간이 소요되는 것으로 나타났다. This investigation was carried out to study the biodegradation of phenol in wastewater using mixed microorganisms. The mixed clutures of phenol degrading microorganisms were selected from various sources such as industrial wastewaters, sludges and soils. The mixed cultures could be adapted to high concentration of phenol by increasing the phenol concentration step by step. The phenol was degraded easily even up to 1,000ppm of phenol using these microorganisms. The predominant bacteria was isolated and characterized as Pseudomonas PI. In a batch system, the removal rate of phenol increased with time due to the lag time of microorganism adapation. The duration time during which phenol could be completely removed was linearly proportional to the initial phenol concentration. And the duration time(td) could be expressed as a funtion of logarithmic initial MLSS concentration(x) as follows. td=?? [8.68-In(x)] In a continuous system, the required residence time to remove phenol completely was found to be 20 hours and 35 hours 500 ppm and 800 ppm of influent phenol concentrations, respectively.
Seo, Hak-Soo,Jeong, Jin-Yong,Nahm, Min-Yeop,Kim, Sam-Woong,Lee, Sang-Yeol,Bahk, Jeong-Dong Korean Society for Biochemistry and Molecular Biol 2003 Journal of biochemistry and molecular biology Vol.36 No.2
Previously, we reported the biochemical properties of RGA1 that is expressed in Escherichia coli (Seo et al., 1997). The activities of RGA1 that hydrolyzes and binds guanine nucleotide were dependent on the $MgCl_2$ concentration. The steady state rate constant ($k_{cat}$) for GTP hydrolysis of RGA1 at 2 mM $MgCl_2$ was $0.0075{\pm}0.0001\;min^{-1}$. Here, we examined the effects of pH and cations on the GTPase activity. The optimum pH at 2 mM $MgCl_2$ was approximately 6.0; whereas, the pH at 2 mM $NH_4Cl$ was approximately 4.0. The result from the cation dependence on the GTPase (guanosine 5'-triphosphatase) activity of RGA1 under the same condition showed that the GTP hydrolysis rate ($k_{cat}=0.0353\;min^{-1}$) under the condition of 2mM $NH_4Cl$ at pH 4.0 was the highest. It corresponded to about 3.24-fold of the $k_{cat}$ value of $0.0109\;min^{-1}$ in the presence of 2 mM $MgCl_2$ at pH 6.0.
Enigma of Small Peptides Ubiquitin and SUMO in Plants
Hak Soo Seo 한국육종학회 2010 한국육종학회지 Vol.42 No.4
Post-translational covalent modifications by small molecules or peptides remodel target proteins. One such modification, made by ubiquitin or small ubiquitin-related modifier (SUMO), is a rapidly expanding field in cell signaling pathways. Ubiquitin attachment controls the turnover and degradation of target proteins while SUMO conjugation regulates their activity and function. Recent studies report many examples of cross-talk between ubiquitin and SUMO pathways, indicating that the boundary is no longer clear. Here, we review recent progress concerning how ubiquitin and SUMO participate in new regulatory roles in plant cell, and how ubiquitination and sumoylation control plant growth and development.