AN ELIGIBLE PRIMAL-DUAL INTERIOR-POINT METHOD FOR LINEAR OPTIMIZATION

조경미,이용훈 영남수학회 2013 East Asian mathematical journal Vol.29 No.3

It is well known that each kernel function defines a primal-dual interior-point method(IPM). Most of polynomial-time interior-point algorithms for linear optimization(LO) are based on the logarithmic kernel function. In this paper we define a new eligible kernel function and propose a new search direction and proximity function based on this function for LO problems. We show that the new algorithm has O((log p)\sqrt{n} log n log{n/\epsilon}) and O((q log p)^{3/2}\sqrt{n} log{n/\epsilon}) iteration bound for large- and small-update methods, respectively. These are currently the best known complexity results.

1920年代 社會主義女性團體에 관한 一硏究 : 權友會 창립 이전

趙京美 淑明女子大學校 1992 韓國學硏究 Vol.2 No.-

연구간호사의 연구중심병원사업 인지도가 연구성과에 미치는 영향 : 연구역량 및 직무만족의 매개효과를 중심으로

조경미,김양균 한국간호과학회 간호행정학회 2015 간호행정학회지 Vol.21 No.3

Purpose: The purpose of this study was to identify the level of project perception for those nurses from research-driven hospitals and to analyze the effect of research-relevant performance in the health care field focusing on the mediated effect of research capacity and job satisfaction. Methods: Data were collected from June, 2014 to July, 2014, and participants were 106 research nurses in Research-driven hospitals. Descriptive statistics, independent t-test, one-way ANOVA, structural equation modeling (SEM)Results: As a result, Research-relevant performance according to project perception of research nurses from Research-driven Hospitals was not statistically significant, but research capacity and job satisfaction had a mediating role. Evaluation System Perception was significantly different from Research Capacity (p<.001), Research Capacity was significantly different from Job Satisfaction (p<.001), Job Satisfaction was significantly different from Research Performance (p<.001)Conclusion: The results indicate that research capacity building and job security research nurses are able to contribute to improving research performance of research-driven hospitals. 목적: 연구중심병원에 소속된 연구간호사들의 연구중심병원 사업에 대한 인지도를 조사하고, 인지도가 연구성과에 미치는 영향에 대하여 조사 방법: 2014.6-7월 연구중심병원에 소속된 106명의 연구간호사를 대상으로 Descriptive statistics, t-test, one-way ANOVA, structural equation modeling (SEM) 실증분석 결과: 본 연구결과에 의하면, 연구중심병원사업 인지도에 따른 연구성과는 통계적으로 유의한 차이가 없었으나, 직무만족 및 연구역량을 매개로 할 때 간접효과를 나타냈다. 평가체계 인지도는 연구역량에 유의한 차이(p<.001)를 보였으며, 직무만족에는 유의한 차이를 보이지 않았다. 연구역량은 직무만족에 유의한 차이(p<.001)를 보였으며, 직무만족은 연구성과에 유의한 차이(p<.001)를 보였다. 결론: 연구간호사의 연구역량 향상과 고용보장은 연구중심병원의 연구성과 향상에 기여할 수 있을 것이다.

AN ELIGIBLE KERNEL BASED PRIMAL-DUAL INTERIOR-POINT METHOD FOR LINEAR OPTIMIZATION

조경미 호남수학회 2013 호남수학학술지 Vol.35 No.2

It is well known that each kernel function denes aprimal-dual interior-point method (IPM). Most of polynomial-timeinterior-point algorithms for linear optimization (LO) are based onthe logarithmic kernel function ([9]). In this paper we dene anew eligible kernel function and propose a new search directionand proximity function based on this function for LO problems. We show that the new algorithm has O((log p)52pn log n log nε ) andO(q32(log p)3pn log nε ) iteration complexity for large- and small-update methods, respectively. These are currently the best knowncomplexity results for such methods.

여대생의 기초화장품 구매장소에 따른 재구매요인

조경미,김강련 국제보건미용학회 2009 국제보건미용학회지 Vol.3 No.1

밀착형 R-러닝 연구 동아리, 그리고 예비유아교사

조경미,변선주,이민영 한국어린이미디어학회 2015 한국어린이미디어학회 학술대회 자료집 Vol.2015 No.10

[P2-44] β-Glucan 첨가 Sponge Cake의 저장 중 품질특성

조경미,김미리,김미경,조한영 한국식품영양과학회 2005 한국식품영양과학회 학술대회발표집 Vol.2005 No.10

임상실습교육의 교수효율성과 임상실습 만족도에 관한 상관성 연구

조경미,이성은 경인여자대학 2002 경인논집 Vol.- No.9

This study was conducted to see the teaching effectiveness of the clinical nursing education and to see the relationship between the teaching effectiveness and the satisfaction of clinical practice. The students from the junior nursing college situated in Incheon who were taking maternity nursing practice classes were surveyed between 1st September 2001 to 15th December 2001. In order to measure the General Characteristics, Teaching effectiveness and Satisfaction of clinical practice, students were asked to self - report the papers which contain 73 questionnaires. In total, 163 subjects were used in this survey. The data were analyzed by SPSS-PC+ program. The result of this study were as follows: 1) For the teaching effectiveness, the average marks were 3.77 out of 5 and giving positive replies, which were higher than the average. Teaching effectiveness, the average marks for role model was 3.93 which were the highest marks. And interpersonal relationship were 3.50, which was the lowest. 2) For clinical nursing education, the classes taught by the classes taught by the faculty professors scored higher marks than part-time instructors for the teaching effectiveness section. 3) Significant relationship was observed as r=0.359, when the relationship between teaching effectiveness and clinical nursing education were analyzed by Pearson's correlation. Also positive relationship was observed in clinical nursing education as 6 out of 8 categorical components was analyzed for teaching effectiveness. This study concludes that in order to provide the satisfaction of clinical practice to the students, the teaching effectiveness plays a significant role. In order word, full time instructor plays very important role in the clinical practice.

CaSrSiO$_{4}$에 전하보상제로 첨가된 Li$^{+}$ 또는 La$^{3+}$이 Eu$^{(3+/2+)}$의 발광효율에 미치는 영향

조경미,장기완,우현주,Sakthivel GANDHI,신동수 한국물리학회 2016 새물리 Vol.66 No.3

The divalent or trivalent europium-ion-activated calcium-strontium-silicate phosphor was synthesized through a conventional solid-state reaction method and co-doped with Li$^+$ or La$^{3+}$ ions. The co-dopants (Li$^+$ or La$^{3+}$) were used in the Eu$^{(3+/2+)}$:CaSrSiO$_4$ system as a charge compensator to increase the luminescence intensity, and the system was investigated thoroughly. The obtained results showed an increased luminescence intensity for Eu$^{3+}$:CaSrSiO$_4$ phosphor co-doped with Li$^+$ ions whereas a decreased luminescence intensity was noted for the Eu$^{2+}$:CaSrSiO$_4$ phosphor. However, another co-dopant, namely, La$^{3+}$ ions, had no effect on the luminescence intensity of Eu$^{3+}$:CaSrSiO$_4$ but increased the intensity as the Eu$^{2+}$ was replaced with Eu$^{3+}$. These results represent unusual phenomena found in the CaSrSiO$_4$ phosphor. CaSrSiO$_{4}$모체에 광 활성제로 첨가된 0.5 mol\%의 Eu$^{3+}$ 및 Eu$^{2+}$의 발광효율을 증대시키기 위하여 전하보상차원으로 첨가된 Li$^{+}$ 또는 La$^{3+}$가 Eu$^{(3+/2+)}$의 발광효율에 미치는 효과를 연구하였다. 고상법을 사용하여 Li$^{+}$ 또는 La$^{3+}$가 첨가된 CaSrSiO$_{4}$: Eu$^{(3+/2+)}$ (0.5 mol\%) 시료를 제조하여 연구를 수행한 결과, Li$^{+}$이온은 Eu$^{3+}$의 발광효율은 증대시키지만 Eu$^{2+}$의 발광효율은 감소시켰다. 하지만, La$^{3+}$는 Eu$^{3+}$에 기인한 발광효과에는 별 영향을 미치지 못하나, Eu$^{2+}$들에 기인한 발광효율을 증대시키는 효과를 가져왔다. 다른 모체들에 첨가된 기존의 연구결과들과는 달리 전하보상이온들의 농도가 특정농도까지는 발광세기를 증가시켰다가 감소된 후, 다시 증가시킨 후 감소시키는 특이한 현상을 보였다. 이러한 현상은 CaSrSiO$_{4}$모체에 첨가된 경우에 발견되는 특이현상이다.

Si의 원료물질이 Li2SrSiO4에 첨가된 Eu(2+/3+)의 발광특성에 미치는 효과

조경미,장기완,이건호,이경규,이태양,김성곤 한국물리학회 2017 새물리 Vol.67 No.4

Lithium strontium silicate phosphors activated with divalent or trivalent europium ions were synthesized through a conventional solid-state reaction method using SiO$_2$ and SiO$_x$ as the sources of Si, and the crystal structures and luminescence properties of those phosphors were characterized. The optical properties of Eu$^{(2+/3+)}$ depended greatly on the raw materials adopted as the Si source; that is, the emission intensity of Eu$^{3+}$-doped Li$_2$SrSiO$_4$ for which SiOx was used as the Si source, was increased up to 300% compared to that of Eu$^{3+}$-doped Li$_2$SrSiO$_4$ prepared with SiO$_2$. However, the emission intensity of Eu$^{2+}$ was even worse. The emission efficiency of Eu$^{2+}$ was also shown not to be directly related with that of Eu$^{3+}$. Si의 원료물질로서 SiO$_2$와 SiO$_x$를 사용하여 Li$_2$SrSiO$_4$:Eu$^{(2+/3+)}$ 형광체를 고상반응법으로 제조하고, 제조된 시료들의 결정성 및 광학적 특성을 연구하였다. Si의 원료물질로서 SiO$_x$를 사용하여 제조한 시료의 경우에 Eu$^{3+}$에 기인한 발광세기가 SiO$_2$를 사용한 경우에 비하여 발광세기가 약 300% 증가하는 효과를 나타내었다. 하지만, Eu$^{2+}$들에 기인한 발광효율은 오히려 감소하였다. 또한 본 연구를 통하여 Eu$^{2+}$에 의한 발광효율은 Eu$^{3+}$에 기인한 발광효율과 직접적인 관계가 없다는 것을 알게 되었다.