우리나라 일부 여고생과 여대생의 건강 위험 행태 분석

한성현,최민자,이선희,이명선,이혜진 한국모자보건학회 2000 한국모자보건학회지 Vol.4 No.1

Bactericidal Effects of Metabolites Synthesized by Two Entomopathogenic Bacteria, Xenorhabdus nematophila and Photorhabdus temperata temperata, against Plant Pathogens

Minjae Kim,Jeamin Kim,Yessl Park,Yonggyun Kim 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05

Two entomopathogenic bacteria, Xenorhabdus nematophila (Xn) and Photorhabdus temperata temperata (Ptt), maintain monoxenic condition within host insect cadaver by synthesizing and releasing various antibiotics. These two bacteria were cultured in tryptic soy broth during different times, which were screened in their antibacterial activities. Both bacterial culture broth had high antibacterial activities against Escherichia coli at their stationary growth phase. The potent culture broth was used to screen target plant bacterial pathogens using both inhibition zone assay and liquid culture assay. Ralstonia sp. was most susceptible, while Xanthomonas sp. was highly resistant. Pseudomonas sp. and Bacillus sp. showed hemi-susceptible. The culture broth was further fractionated into hexane and diethylether extracts. Significant antibacterial effect was found in the diethylether extract

Temperature-dependent orbital physics in a spin-orbital-lattice-coupled2pelectron Mott system: The case ofKO2

Kim, Minjae,Min, B. I. American Physical Society 2014 Physical review. B, Condensed matter and materials Vol.89 No.12

We have investigated the temperature (T)-dependent evolution of orbital states in a typical spin-orbital-lattice-coupled 2p electron Mott system KO2, based on the electronic structures obtained by the dynamical mean-field theory as well as the density functional theory. We have shown that KO2 exhibits the orbital fluctuation feature at high T due to degenerate pi(g)* orbitals. Upon cooling, the orbital fluctuation is suppressed by the Jahn-Teller-type crystal field that becomes stronger with the lowering of structural symmetry, and then the ferro-orbital (FO) ordering emerges at low T. This FO ordering feature distinguishes KO2 from RbO2 and CsO2 in that the latter two seem to have antiferro-orbital orderings at low T, indicating that the underlying physics is different between them. We propose that the suppression of the orbital fluctuation in KO2 can be observed by thermal-conductivity measurement, as observed in spin-orbital-lattice-coupled 3d transition-metal oxides such as LaVO3.

Hybrid Thermostat Strategy for Enhancing Fuel Economy of Series Hybrid Intracity Bus

Minjae Kim,Daebong Jung,Kyoungdoug Min IEEE 2014 IEEE Transactions on Vehicular Technology VT Vol.63 No.8

<P>The recently developed power distribution strategies in hybrid electric vehicles (HEVs) are often hard to apply, or the mathematical backgrounds are burdened by very complicated calculations. In this paper, a new control strategy, referred to as a hybrid thermostat strategy, is proposed for a series-type HEV (SHEV). The proposed strategy has its foundation in the thermostat strategy and incorporates merits from the power follower strategy such that it overcomes those strategy weaknesses and accomplishes increased efficiency with a practical concept. The development of the proposed strategy is based on AMESim and Simulink cosimulation with Simplex method optimization.</P>

Prediction of itching diagnostic marker through RNA sequencing of contact hypersensitivity and skin scratching stimulation mice models

Kim, Young-Won,Zhou, Tong,Ko, Eun-A,Kim, Seongtae,Lee, Donghee,Seo, Yelim,Kwon, Nahee,Choi, Taeyeon,Lim, Heejung,Cho, Sungvin,Bae, Gwanhui,Hwang, Yuseong,Kim, Dojin,Park, Hyewon,Lee, Minjae,Jang, Eunk The Korean Society of Pharmacology 2019 The Korean Journal of Physiology & Pharmacology Vol.23 No.2

Pruritus (itching) is classically defined as an unpleasant cutaneous sensation that leads to scratching behavior. Although the scientific criteria of classification for pruritic diseases are not clear, it can be divided as acute or chronic by duration of symptoms. In this study, we investigated whether skin injury caused by chemical (contact hypersensitivity, CHS) or physical (skin-scratching stimulation, SSS) stimuli causes initial pruritus and analyzed gene expression profiles systemically to determine how changes in skin gene expression in the affected area are related to itching. In both CHS and SSS, we ranked the Gene Ontology Biological Process terms that are generally associated with changes. The factors associated with upregulation were keratinization, inflammatory response and neutrophil chemotaxis. The Kyoto Encyclopedia of Genes and Genomes pathway shows the difference of immune system, cell growth and death, signaling molecules and interactions, and signal transduction pathways. Il1a, Il1b and Il22 were upregulated in the CHS, and Tnf, Tnfrsf1b, Il1b, Il1r1 and Il6 were upregulated in the SSS. Trpc1 channel genes were observed in representative itching-related candidate genes. By comparing and analyzing RNA-sequencing data obtained from the skin tissue of each animal model in these characteristic stages, it is possible to find useful diagnostic markers for the treatment of itching, to diagnose itching causes and to apply customized treatment.

Sex-ratio bias induced by mutation

Kim, Minjae,Jeong, Hyeong-Chai,Baek, Seung Ki American Physical Society 2019 Physical Review E Vol.99 No.2

SON PREFERENCE AND FAMILY BUILDING DURING FERTILITY TRANSITION IMPLICATIONS ON CHILD SURVIVAL

Minja Kim Choe(김민자),Seung-Kwon Kim(김승권) 한국인구학회 1998 한국인구학 Vol.21 No.1

한국에서는 가부장제도를 기초로 한 가족제도의 영향으로 심한 남아선호현상이 계속되고 있으며 또한 출산력은 최근 20여 년 간 급격히 저하되고 있다. 연구사례에 의하면, 한국은 남아선호경향이 세계 여러 나라 중 그 정도가 가장 심한 편이며, 출산력 저하속도 또한 어느 국가보다 빠르게 성취되었음을 보여준다. 이 논문에서는 잔존하고 있는 남아선호태도가 출산력 저하과정에서 출산행태를 통한 가족 형성 과정과 영아 및 유아사망력에 어떤 영향을 끼치고 있는지 살펴본다. 한국을 비롯한 남아선호현상이 심한 나라에서는 출산행태가 남아선호 현상을 크게 반영하며 여아의 영아 및 유아 사망력이 남아보다 높다는 것은 이미 여러 연구 결과가 입증해주고 있다. 이 논문에서 중점적으로 살펴보고자 하는 점은 남아선호, 출산행태, 영아 및 유아 사망력 세 분야가 급격한 출산력저하 과정에서 어떤 상호관계를 가지는지 살펴보는 것이다. 먼저, 동아시아와 남아시아의 남아선호 현상이 심한 나라의 기존 연구결과에 의해 남아선호 현상이 출산행태에 미치는 영향이 출산력 정도에 따라 어떻게 변하는가를 보고, 이어서 한국 조사자료(1991년 전국 출산력 및 가족보건실태조사)를 분석하여 출산력저하 과정에서의 남아선호 현상이 출산 행태에 미치는 영향을 심층분석한다. 또 출산행태 자체가 영아 및 유아 사망력에 큰 영향을 준다는 점을 고려하여 남아선호 현상과 출산행태의 상호관계가 남ㆍ여아의 사망력 차이를 간접적으로 설명한다는 가정하에 그 차이정도를 검토한다. 동아시아와 남아시아의 출산행태에 의하면, 현존자녀 중 아들이 없는 경우는 아들이 있는 경우보다 추가자녀를 가질 확률이 훨씬 높으며, 그 확률의 비교차(relative risk)는 출산력 수준이 낮을수록 더 큰 경향이다. 다시 말하면, 출산력저하는 남아선호 현상과 출산행태의 상호관계를 더욱 악화시키는 결과를 보여준다. 합계출산률이 3.3이던 1974년 이전에는 아들이 없는 사람에 비해 아들이 있는 사람은 40% 적게 셋째 아이를 가졌으며, 합계출산률이 1.8이던 1980~84년에는 아들이 없는 사람에 비해 있는 사람이 83% 적게 셋째아이를 가졌음이 추정되었다. 둘째~넷째 아이 중 “아들을 보기 위해서 원하는 아이보다 더 낳은 아이”는 1975년 이전에는 4% 정도였으나 1980~84년에는 13%나 되는 것으로 추정되었다. 남아선호 현상은 영아 및 유아 사망력에도 영향을 주고 있다. 한국의 영아사망력(0세)은 남자가 여자보다 조금 높지만, 유아 사망력(1-4세)은 여자가 남자보다 높은 것으로 추정되어 있다. 출산행태, 특히 출산간격은 영아 및 유아 사망력에 큰 영향을 준다는 점은 잘 알려진 사실이다. 한국에서도 자신의 출생 후 24개월 이내에 동생이 태어난 아이는 그렇지 아니한 아이에 비하여 5세 이하 사망력이 2. 7배 이상 높게 추정된다. 또한 1971-85년 출생한 아이 중 남아선호와 출산행태간 관계의 결과로 여자아이는 24.1%가 24개월 이내에 동생이 태어난 데 비하여, 남자아이는 18.0%가 24개월 이내에 동생이 태어난 것으로 나타났다. 이러한 차이는 여자아이의 5세 이하 사망률이 남자아이보다 6% 높은 결과를 야기한다. 일반적으로 낮아진 영아 및 유아 사망력에도 불구하고 한국의 여자아이들이 남자보다 유아사망력을 경험하며 그 요인의 하나가 남아선호에서 비롯된 출산행태 때문이라는 것은 주목할 만한 점이다. This study reviews the relationship between son preference and fertility behavior, and infant and child mortality in the context of fertility and mortality decline. In Korea the situation reveals that fertility can decline to a very low level even in the presence of strong son preference, but son preference has certain effects on fertility and childhood mortality. The effect of son preference on fertility increased as the level of fertility declined. Our findings show that son preference causes excess female childhood mortality both directly and indirectly through fertility. Also, in Korea, the analysis reveals that female children suffer excessively high level of mortality and part of the excess mortality is due to parents' behavior on family building related to the effort to secure the birth of a son.

Treatment of Atmospheric-Pressure Radio Frequency Plasma on Boron Nitride for Improving Thermal Conductivity of Polydimethylsiloxane Composites

Kim, Yeongseon,Hwang, Sosan,So, Jae Il,Kim, Chae Lin,Kim, Minjae,Shim, Sang Eun Springer-Verlag 2018 Macromolecular Research Vol.26 No.10

Image restoration based on projection onto convex sets algorithm for beam modulation CT acquisition

Kim, Dohyeon,Lee, Donghoon,Kim, Hyemi,Chao, Zhen,Lee, Minjae,Kim, Hee-Joung Pergamon 2019 Radiation physics and chemistry Vol.158 No.-

N-doped Al₂O₃ thin films deposited by atomic layer deposition

Kim, Minjae,Kang, Kyung-Mun,Wang, Yue,Park, Hyung-Ho Elsevier 2018 THIN SOLID FILMS - Vol.660 No.-

<P><B>Abstract</B></P> <P>The present study focused on nitrogen doped Al<SUB>2</SUB>O<SUB>3</SUB> thin films using atomic layer deposition, varying the deposition temperature from 55 to 170 °C. Al<SUB>2</SUB>O<SUB>3</SUB> thin film growth rate and electrical properties were mostly dependent on deposition temperature. Nitrogen concentration decreased from 2.7 to 2.4% with increasing deposition temperature. X-ray photoelectron spectroscopic analysis confirmed that nitrogen doping in Al<SUB>2</SUB>O<SUB>3</SUB> decreased formation of oxygen related defects, including non-lattice oxygen. Surface morphology analyses also showed that N-doping reduced Al<SUB>2</SUB>O<SUB>3</SUB> film surface roughness. Reduced oxygen related defects significantly reduced leakage current by 1000 times when comparing with as-deposited films. Minimum leakage current (5 × 10<SUP>−10</SUP> A/cm<SUP>2</SUP>) was observed for N-doped Al<SUB>2</SUB>O<SUB>3</SUB> film deposited at 170 °C and post-annealed at 400 °C, including a decrease by 10 times through N-doping.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Al<SUB>2</SUB>O<SUB>3</SUB> thin films with doped nitrogen were deposited using atomic layer deposition. </LI> <LI> N was incorporated up to 2.72 at.% at the deposition temperature of 55 °C by ALD. </LI> <LI> RMS roughness of Al<SUB>2</SUB>O<SUB>3</SUB> thin film was reduced to under 1 nm through N-doping. </LI> <LI> Leakage current of Al<SUB>2</SUB>O<SUB>3</SUB> thin film was reached to 5 × 10<SUP>−10</SUP>A/cm<SUP>2</SUP> by N-doping. </LI> </UL> </P>