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혼화재료를 혼입한 압출 성형 경량콘크리트 패널의 기초적 특성에 관한 실험적 연구
김영진,남정민,공민호,김광기,임남기,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
The propose of this study is to discover the extrusion lightweight concrete panel mixing by admixture. The standard of water ratio 50% and weight substitution 0%, 10% by Fly-ash. When produce manufactures, there use to maintain its form weight substitution and addition among the viscosity agent each Silica-fume and Hydroxy propyl methyl cellulose. The study is basic properties and performances of extrusion lightweight concrete panels. Testing methods was specific gravity, water absorption, resistance to impact, thermal conductivity, sound insulation.
CFT구조용 초고강도 충전 콘크리트의 현장 적용을 위한 실험적 연구
이장환,남정민,정근호,김진호,정상진,최문식 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
Due to social problems such as the increasing of land price and the expanding of city, buildings require more complex and bigger components and structure. However, the complex and massive building projects need new technology to solve effect of local buckling and the needs for more space. Hence, Concrete Filled Tube Steel (CFT), the tube steel to hold concrete during pouring and curing of concrete procedure, which helps to reduce local buckling and space, was developed. Most researches on CFT might not be focused on the characteristic of concrete filled in tube but structural analysis. However, it is the essential factor to increase the strength of concrete on CFT for having efficient results. Therefore, this paper will describe how to apply CFT into the construction site through examining High Strength Concrete (800kg/cm2), the strength of core, and bleeding during pouring strategy.
Kim, Hyo Jung,Park, Ji-Hwan,Kim, Jingil,Kim, Jung Ju,Hong, Sunghyun,Kim, Jeongsik,Kim, Jin Hee,Woo, Hye Ryun,Hyeon, Changbong,Lim, Pyung Ok,Nam, Hong Gil,Hwang, Daehee National Academy of Sciences 2018 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.115 No.21
<▼1><P><B>Significance</B></P><P>Leaf senescence is regulated in a complex manner, involving time-dependent interactions with developmental and environmental signals. Genetic screens have identified key regulators of senescence, particularly late-stage senescence regulators. Recently, time-course gene-expression and network analyses, mostly analyses of static networks, have predicted many senescence regulators. However, senescence is defined by time-evolving networks, involving the temporal transition of interactions among senescence regulators. Here, we present time-evolving networks of NAM/ATAF/CUC (NAC) transcription factors, central regulators of leaf senescence in <I>Arabidopsis</I>, via time-course gene-expression analysis of NACs in their mutants. These time-evolving networks revealed a unique regulatory module of NACs that controls the timely induction of senescence-promoting processes at a presenescent stage of leaf aging.</P></▼1><▼2><P>Senescence is controlled by time-evolving networks that describe the temporal transition of interactions among senescence regulators. Here, we present time-evolving networks for NAM/ATAF/CUC (NAC) transcription factors in <I>Arabidopsis</I> during leaf aging. The most evident characteristic of these time-dependent networks was a shift from positive to negative regulation among NACs at a presenescent stage. ANAC017, ANAC082, and ANAC090, referred to as a “NAC troika,” govern the positive-to-negative regulatory shift. Knockout of the NAC troika accelerated senescence and the induction of other <I>NAC</I>s, whereas overexpression of the NAC troika had the opposite effects. Transcriptome and molecular analyses revealed shared suppression of senescence-promoting processes by the NAC troika, including salicylic acid (SA) and reactive oxygen species (ROS) responses, but with predominant regulation of SA and ROS responses by ANAC090 and ANAC017, respectively. Our time-evolving networks provide a unique regulatory module of presenescent repressors that direct the timely induction of senescence-promoting processes at the presenescent stage of leaf aging.</P></▼2>
정연욱(Yeun Wook Jung),이주영(Ju Young Lee),김영선(Young Sun Kim),노남진(Nam Jin Noh),이승열(Seung Yeoul Lee),송병호(Byung Ho Song) 한국철도학회 2015 한국철도학회 학술발표대회논문집 Vol.2015 No.10
철도실시설계단계에서 이용자 중심의 안전성을 강화하고자 교통안전법 및 교통안전진단 지침이 개정됨으로써 14 년 10 월 13 일 철도교통안전진단제도가 시행되었다. 이후 중앙선, 하남선 등 15 개 철도건설사업 실시설계에 대하여 철도교통안전진단이 시행되었고, 그 결과 이용자 및 열차운행측면에서의 안전위험요인이 도출 및 개선되었다. 본 연구에서는 철도교통안전진단제도가 보다 더 실효성 있게 시행될 수 있도록 진단대상 · 진단시기 등을 명확화 하였고, 진단항목 고도화를 위하여 기존 진단항목 보완 및 신규진단항목을 개발하였다. 이와 함께, 철도교통안전진단에 대한 평가제도 도입의 필요성 및 시행방안을 제시하였다. To enforce safety of passenger at enforcement design stage of rail, Railroad Traffic Safety Diagnosis is introduced at Oct 13, 2014 by revising Traffic Safety Act and Traffic Safety Diagnosis. Railroad Traffic Safety Diagnosis is implemented about enforcement design which is for 15 railroad construction like Jung-Ang Line and Ha-Nam Line, therefore, danger factors about safety are deducted and improved in respect of passenger and train operation. In this study, diagnosis object, diagnosis time and other article are clarified for effectiveness of the Safety Diagnosis and diagnosis articles are supplemented and developed for enhancement. In addition, necessity and execution plan of evaluation system are proposed.
수용성 절삭유제 내에서 Saccharomyces cerevisiae와 Escherichia coli의 성장에 관한 연구
정광진,최희영,김장규,원성호,김남기 成均館大學校 科學技術硏究所 1992 論文集 Vol.43 No.2
The water-soluble cutting oil was used in the type of the mixture of additive lubricant, surfactant, etc., as the organic nutrients, with water. Therefore it was easy to be affected by microbials ; they brought the bad odor by putridity, decreased the cutting property, and destroyed the emulsion phase. In the study using cells, Saccharomyces cerevisiae and Escherichia coli, we studied the effect of concentration and dilution ratio on the growth of cells and the cell growth rate, the pH variance and the change of oil's concentration. The results obtained in this experiment were as follows : 1) The result of test dilution ratio (water:oil) vs. cell growth was that by using E. coli, the growth was better in this order in emulsion type (sample 1) 50:1 > 30:1 > 100:1, and in the soluble type (sample 2) the order was 100:1 > 50:1 > 30:1. The effect of the cutting oil's concentration on the Saccaromyces cerevisiae's was less in this order 100:1 < 50:1 < 30:1 ; the maximum growth was occurred at 100:1. 2) In sample 1 by using E, coli, pH range was changed from 9.5 to 8.0 and refractive index(the cutting oil's concentration) was changed from 1.3327 to 1.3318. And in the test using S. cerevisiae, pH range was varied from 9.5 to 6.2 and refractive index was changed from 1.3330 to 1.3310. In sample 2 by using E. coil, pH was changed to 8.9 and refractive index was changed from 1. 3315 to 1.3313 and in that of using S cerevisiae, pH was changed to 8.1 and refractive index was decreased from 1.3355 to 1.3340.
하시모토 갑상선염과 동반된 갑상선 유두암에서 BRAFV600E의 발현과 임상적 특징
남성진,최영식,박요한,김정훈 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.2
Background: An association between Hashimoto's thyroiditis (HT) and papillary thyroid carcinoma (PTC) is still controversial. Studies to date established the coexistence of HT in 11% to 36% of PTC patients. BRAFV600E mutation was presented 90% with no HT, 64% with HT in PTC patients. Therefore, BRAFV600E mutation is associated with the pathogenesis of PTC arising in HT. The purpose of this study was to identify predictive factors for the coexistence of PTC and HT and to evaluate the association of the BRAFV600E mutation with the clinicopathological features of coexistence of PTC and HT. Methods: A total of 247 patients underwent surgery for thyroid disorders between January 2007 and April 2009. In all, 212 patients was diagnosed as thyroid papillary carcinoma only (PTC group), 33 had coexistence of PTC and HT (PTC+HT group), and 2 had been diagnosed with HT. DNA was extracted from paraffin embedded thyroid tumor specimens taken from 99 patients with PTC, 13 coexistence of PTC and HT, and 2 was HT. The presence of the BRAFV600E mutation was determined by polymerase chain reaction amplification of exon 15 followed by direct sequencing. Results: Among clinicopathological features sex, age, tumor size and capsule invasion was not significant between PTC group and PTC+HT group. Lymph node metastasis and stage was significantly lower in PTC+HT group than PTC group (p=0.044). BRAFV600E mutation was found in 34 of the 99 PTC group (34.3%), 1 of the 13 PTC+HT group and 2 HT show no BRAFV600E mutation. Conclusion: These data demonstrated that the coexistence of PTC and HT was less aggressive than PTC only.
K₃Li₂Nb_5O_15 단결정의 성장과 특성에 관한 연구
진병문,노지현,김태훈,김정남,김진수 동의대학교 기초과학연구소 2000 基礎科學硏究論文集 Vol.10 No.1
The potassium lithium niobate (K₃Li₂Nb_5O_15) single crystals were growing in K_χLi_(1-χ)NbO₃(x=0.4∼0.6) chemical formular by the Czochralski method. Crystal growth is studied in two orientations with growth along a-axis and c-axis. We have subjected this crystal to x-ray diffraction studies and found that they are single-crystalline and belong to tetragonal system with the lattice parameters a=b=12.577Å and c=3.997Å. The temperature dependence of dielectric constant was measured in the region of the phase transition. Curie temperature and diffuseness of phase transition are influenced by composition concentration. The composition and cation distribution of ferroelectric TB-type niobate crystals has a strong influence on the ferroelectric properties. Growth condition, optical transmittance, etching pattern and dielectric properties are presented and discussed.