1,3-디메톡시-티아캘릭스[4]크라운-5-에테르의 이형체들의 상대적인 안정성과 구조들에 대한 mPW1PW91 계산 연구

김광호,최종인,Kim, Kwang-ho,Choe, Jong-In 대한화학회 2009 대한화학회지 Vol.53 No.5

1,3-디메톡시-티아캘릭스[4]크라운-5-에테르 (3)의 다양한 이형체들(cone_oo, cone_oi, pc_oo, pc_io, pc_oi, pc_ii, 13a_oo, 13a_io)에 대한 구조들이 DFT B3LYP/6 - 31 + G(d,p)와 mPW1PW91/6 - 31 + G (d,p) (hybrid HF-DF) 계산 방법들에 의하여 최적화 되었다. 13a_oo (1,3-alternate 이형체에서 두 개의 메 톡시기가 모두 밖으로 향해 있는 구조)가 가장 안정하였으며, 기존에 보고된 실험 결과와 잘 일치하였다. mPW1PW91/6 - 31 + G(d,p) 계산에 의한 상대적인 안정성은 다음과 같았다: 13a_oo (가장 안정) > 13a_io$\sim$ pc_io$\sim$cone_oo > cone_oi$\sim$pc_oo$\sim$pc_oi > pc_ii. Molecular structures of the various conformers for the 1,3-dimethoxy-p-tert-butylthiacalix[4] crown-5-ether (3) were optimized by using DFT B3LYP/6 - 31 + G(d,p) and mPW1PW91/6 - 31 + G(d,p) (hybrid HF-DF) calculation methods. We have analyzed the energy differences and structures of eight in/out orientations (cone_oo, cone_oi, pc_oo, pc_io, pc_oi, pc_ii, 13a_oo, 13a_io) of two methoxy groups in three major conformations (cone, partial-cone and 1,3-alternate). The 13a_oo (out-out orientation of the 1,3-alternate conformer) is calculated to be the most stable among eight different conformations of 3, and in accord with the experimental result. The ordering of relative stability resulted from the mPW1PW91/6 - 31 + G(d,p) calculation method is following: 13a_oo > 13a_io$\sim$pc_io$\sim$cone_oo > cone_oi$\sim$pc_oo$\sim$pc_oi > pc_ii.

공무원 순환보직에 관한 연구

김광호,Kim, Kwang-ho 한국개발연구원 2008 韓國 開發 硏究 Vol.30 No.2

본 연구는 공무원의 전문성 축적을 저해하는 것으로 지속적으로 지적되는 순환보직의 실태를 파악하고 그 개선방안을 제시하는 것을 목적으로 한다. 우리나라 중앙부처 과장급 이상 공무원의 평균재직기간은 1년 남짓으로 매우 짧아 업무의 인수 인계에서 오는 비효율 및 업무공백, 전문성 축적기회의 감소, 책임성 저하, 정책의 일관성 및 연속성 결여 등 여러 문제를 낳으며, 특히 고도의 전문성을 요하는 대외 협상 분야에서 큰 국가적 손실을 낳는 것으로 파악된다. 이의 개선을 위해서는 전문성을 고려하는 보직이동, 전보범위의 축소, 전보제한기간의 강화 등의 조치가 필요하나, 근본적으로 현재와 같은 과도한 순환보직이 연공서열에 기초한 계급제에 기인하므로 장기적으로 공직분류제도를 계급제에서 직위분류제로 전환하고 실적주의적 요소를 강화해야 할 것이다. This paper aims at analyzing the practice of job rotation in the Korean government and putting forward policy suggestions. The Korean government is often accused of low capacity and weak competitiveness, which mainly result from the low expertise of public officials. Considering the high quality of human resources flowing into the public sector in Korea, solutions should be found from the structure of the system. This paper regards frequent position changes due to excessive job rotation as a key factor undermining the accumulation of expertise and conducts in-depth analyses. The current practice of frequent rotation shows that the average tenure period of government officials at director level and above is only about one year, far shorter than those in major developed countries, which causes many problems such as low efficiency, lack of accountability and policy consistency, and low opportunity for accumulating expertise. Simple models are set up to analyze job rotation and other alternative personnel management systems. Analyses find that it would be desirable to have each individual experience various positions during the initial rotation period to find his/her own aptitude, and then accumulate expertise by settling in at a certain specialized field for a prolonged period of time based on the revealed aptitude in mid and high positions. This turns out to be in line with the structure of the Career Development Program which is being introduced. The model-based analysis of this paper distinguishes this study from preceding ones conducted in the traditional framework of personnel management study. Practical measures to mitigate the problems of frequent job rotation include rotating within the area of specialty, narrowing the scope of transfer, and reinforcing the minimum tenure period. However, since the current frequent rotation is fundamentally attributable to the rank system based on seniority, the present civil service classification system needs to be converted into a position classification system in the long run.

무정위자력계(無定位磁力計)에 의(依)한 암석(岩石)의 잔류자기측정법(殘留磁氣測定法) -특(特)히 연세대(延世大) 지질학과(地質學科)에 설치(設置)된 무정위자력계(無定位磁力計)의 제작(製作)을 중심(中心)으로-

김광호,민경덕,Kim, Kwang Ho,Min, Kyung Duck 대한자원환경지질학회 1981 자원환경지질 Vol.14 No.3

경사증착법을 이용한 PM-OLED용 무기박막형 보호층 연구

김광호,김훈,김재경,도이미,한정인,주병권,Kim, Kwang-Ho,Kim, Hoon,Kim, Jae-Kyung,Do, Lee-Mi,Han, Jeong-In,Ju, Byeong-Kwon 한국전기전자재료학회 2003 전기전자재료학회논문지 Vol.16 No.9

In this study, the MgO thin-film passivation layer was adopted to protect passive matrix organic light emitting diode(PMOLED) with the cathode separator from moisture and oxygen. Using the substrate rotate and tilt technique during the deposition, the organic and cathode layers were perfectly covered with MgO. And then, we analyzed the difference of the current-voltage and luminescence characteristics between passivated OLED of the MgO and non-passivated OLED. It was found that the number of dark spot generated from the degradated pixel was decreased owing to the Mgo thin-film passivation layer using the tilt & rotate technique. And the half-life time passivated OLED was improved two times more. Thus, the MgO could be vaccum-deposited under the low temperature and had a merit that the organic layer was not much affected. We can consider that MgO thin film passivation method can be adopted to protect the OLED from moisture and oxygen and can offer the enhancement of lifetime.

농업용 저수지를 활용한 동화법 소수력발전사업

김광호,Kim Kwang Ho 한국관개배수위원회 2005 한국관개배수논문집 Vol.12 No.1

수도 품종의 잎집무늬마름병 저항성연구 I. 잎집무늬마름병 저항성검정을 위한 균주선발

김광호,양계진,Kwang-Ho Kim 한국작물학회 1987 한국작물학회지 Vol.32 No.1

Fifty eight isolates of R. solani collected from rice plants infected to sheath blight disease at seven different locations through the country were evaluated for their cultural characteristics on media. Degree of resistance of nine rice varieties were tested by the seven isolates representing each culture type from the grouped pathogene-city. Great variation of cultural characterisics on PSA media was observed among isolates, and 58 isolates tested were grouped into 7 culture types. Locational distribution of isolates belong to each culture type was different between types, and only isolate type 'Ia' was distributed in all locations collected. The degree of pathogene-city of each isolate to rice adult plant was different between 7 culture types grouped, and no isolates infected severely on all tester rice varieties. The degree of resistance to the disease showed great variation among 9 tester varieties, and varietal reaction to the disease was varied along with isolates inoculated. An isolate, la, shown strong pathogenecity and distributed through 7 locations was selected for the screening of varietal resistance to rice sheath blight disease. 벼 품종의 잎집무늬마름병 저항성검정에 사용할 R. solani 균주를 선발할 목적으로 전국 7개지역에서 수집한 58개균주의 배양특성을 조사하여 균주의 배양형을 나누고 각 배양형에서 대표되는 균주를 선정, 9개 벼 품종에 접종시켜 균주의 병원성과 품종저항성을 조사한 결과를 요약하면 다음과 같다. 1. 벼 잎집무늬 마름병균의 균주를 PSA 배지상에서 기르면서 조사한 5종류의 배양특성은 균주간에 뚜렷한 차이가 있었으며 균주별 배양특성에 근거하여 공시한 58개 균주를 7종의 배양형으로 나눌 수 있었다. 2. 각 배양형에 속하는 잎집무늬마름병균 균주의 지역적인 분포는 차이가 있어서 균주분포의 지역특이성이 인정되었으며 Ia 배양형에 속하는 균주만이 7개 지역 모두에 분포되어 있었다. 3. 각 배양형을 대표하는 7개 균주의 병원성은 서로 달랐으며 균주별 병원성은 검정품종에 따라서 그 정도가 다르게 나타났다. 4. 균주의 병원성검정에 사용되었던 9개 벼 품종의 저항성정도도 품종간 차이가 켰으며 품종의 저항성 반응도 접종한 균주에 따라서 달리 나타나는 경우가 있었다. 5. 공시한 균주의 병원성정도와 지역적인 분포범위를 고려하여 벼 잎집무늬마름병 저항성검정에 사용할 균주를 선발할 수 있었다.

기문(奇門)의 원리(原理)와 기문침법(奇門鍼法) 활용에 대한 연구

김광호,강정수,Kim, Kwang-ho,Kang, Jung-soo 대한침구의학회 2000 대한침구의학회지 Vol.17 No.3

Objectives : Gimun-chimbub(Jimen-zhenfa) is the method of needling which is based on Gimun-hak (Jimen-xue), and it is the most excellent method of needling than any other methods. In spite of the superiority of Gimun-chimbub(Jimen-zhenfa), there are few documents which explain it in details. The purpose of this study is to make clear principle of Gimun(Jimen) & apptication of Gimun-chimbub(Jimen-zhenfa) so many clinicians can make good use of it. Methods : Through investigation of many documents concerning Gimun(Jimen), Gimun-chimbub(Jimen-zhenfa) and Bosa(buxie), the author first explained principle of Gimun(Jimen) and then made clear how to apply it in needling and how to perform Bosa(buxie). Conclusions : 1. Gimun-hak(Jimen-xue) is constituted combinations of infinite change of Chen-Gy-In Samje(Tianrendi Sancai) and Hado lakse(Hetu Luoshu). Gimun-hak(Jimen-xue), is the study which shows us the change of space time e- ntangling at once, and it is applied to troublous times and critical situations. Gimun-chimbub(Jimen-zhenfa) combines of the method of needling with the time when Chen(Tian) opens and closes. So according to each cases, doctor must consider the adequate time. For example, in case of acute disease, the first day when the patient got ill is ta - ken. In case of chronic disease, the day when the patient came to see a doctor is taken. In Gimun-chimbub(Jimen-zhenfa), first it uses Jik-Sa-Mun(zhishimen) which can ac - cept Chen-Gi(tianqi). When needling, doctor must find the accurate acu-points and perform Bosa(buxie). Finally it uses Saeng-Mun(shengmen) which stirs up the vit - ality. Using Saeng-Mun(shengmen) decreases the rate of relapse of diseases.

Al₂O₃/Si/Al₂O₃구조를 이용한 실리콘태양전지 제작 및 특성

김광호,Kim, Kwang-Ho 한국반도체디스플레이기술학회 2015 반도체디스플레이기술학회지 Vol.14 No.4

Using a combined CVD and ALD equipment system, multi-layer quantum well structures of $Al_2O_3/a-Si/Al_2O_3$ were fabricated on silicon Schottky junction devices and implemented to quantum well solar cells, in which the 1~1.5 nm thicknesses of the aluminum oxide films and the a-Si thin film layers were deposited at $300^{\circ}C$ and $450^{\circ}C$, respectively. Fabricated solar cell was operated by tunneling phenomena through the inserted quantum well structure being generated electrons on the silicon surface. Efficiency of the fabricated solar cell inserted with multi-quantum well of 41 layers has been increased by about 10 times that of the solar cell of pure Schottky junction solar cell.

초박막 폴리머 강유전체 박막의 특성

김광호,Kim, Kwang-Ho 한국반도체디스플레이기술학회 2020 반도체디스플레이기술학회지 Vol.19 No.4

The properties of ultra-thin two-dimensional (2D) organic ferroelectric Langmuir-Blodgett (LB) films of the poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] were investigated to find possible applicability in flexible and wearable electronics applications. In the C-V characteristics of the MFM capacitor of 2-monolayer of 5 nm films, a butterfly hysteresis curve due to the ferroelectricity of P(VDF-TrFE) was confirmed. Typical residual polarization value was measured at 2μC/㎠. When the MFM capacitor with ultra-thin ferroelectric film was measured by applying a 10 Hz bipolar pulse, it was shown that 65% of the initial polarization value in 105 cycles deteriorated the polarization. The leakage current density of the 2-monolayer film was maintained at about 5 × 10-8 A/㎠ for the case at a 5MV/cm electric field. The resistivity of the 2-monolayer film in the case at an electric field at 5 MV/cm was more than 2.35 × 1013 Ω·cm.

Paleomagnetism and K-Ar Age of Volcanic Rocks from Guryongpo Area, Korea

김광호,원종관,마츠다 준이치,나가오 케이스케,이문원,Kim, Kwang Ho,Won, Jong Kwan,Matsuda, Jun-ichi,Nagao, Keisuke,Lee, Moon Won The Korean Society of Economic and Environmental G 1986 자원환경지질 Vol.19 No.3

구룡포지역을 고지자기학적으로 연구하고 또한 분포된 암석의 K-Ar연대를 결정하기 위하여 14개지점으로부터 반암류, 안산암류, 석영안산암류 및 적색사암등의 시료를 채취하였다. K-Ar연대 측정결과 반암류와 화산암류는 각각 42.7Ma 및 22.7-19.4Ma에 형성되었음을 나타냈다. 각 지점별로 이들 시료를 최적자기장에서 교류소자한 후에는 자화방향이 한방향으로 집중되었다. 후기마이오세의 반암류들은 모두 정자화를 하고 있었고 후기올리고세에서 초기마이오세에 걸쳐서 분출된 화산암류들은 정자화를 한 것과 역자화를 한 것으로 나뉘어 나타났다. 반암류와 화산암류의 평균 자화방향은 서로 유사한 방향이었으며 또한 동쪽 편각을 보여주었다. 암석전체의 평균자화방향은 평균편각 $Dm=43.8^{\circ}$, 평균복각 $Im=53.5^{\circ}$, 95%의 신뢰도를 나타내는 원의 반경 ${\alpha}95=12.2^{\circ}$이다. 연구지역의 암석들에서 정자극과 역자극이 동시에 나타난점과 또한 이들이 서로 비슷한 편각을 갖고 있다는 점들로 미루어 측정된 고지자기 방향의 신뢰도가 크다고 판단되었다. 측정된 동쪽편각 $43.8^{\circ}$는 이 지역이 동쪽으로 약 $40^{\circ}{\sim}50^{\circ}$정도 회전한 결과라 해석하였다. Samples of porphyries, andesites, decites and sandstones were collected from 14 sites in order to study paleomagnetism and to determine K-Ar age in Guryongpo area. K-Ar age dating indicates that porphyries and volcanic rocks formed 41.7 and 22.7~19.4Ma, respectively. The mean direction of remanent magnetization for each site was generally well grouped after alternating field demagnetization. Both normal and reversed directions are present. The mean magnetic direction of the porphyries of Late Eocene and that of the volcanic rocks of Late Oligocene to Early Miocene have similar, easterly declinations. Overall magnetic direction is $Dm=43.8^{\circ}$, $Im=53.5^{\circ}$, ${\alpha}95=12.2^{\circ}$. the reliability of the observed paleomagnetic directions is ascertained by the presence of normal and reversed polarities. This is also conformed by the similarity of the declinations of the normal and reversed polarities. Observed easterly declinations in this area are attributed to local clockwise rotation of the land mass by approximately 40~50 degrees since early Miocene.