• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 춘계학술대회 논문집 센서 박막재료 반도체 세라믹
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• pp.116-119
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• 2003

Self-patterning of thin films using photosensitive sol solution has advantages such as simple manufacturing process compared to photoresist/dry etching process. In this study, ferroelectric $Sr_{0.9}Bi_{2.1}Ta_2O_9$(SBT) and $La_{0.5}Sr_{0.5}CoO_3$(LSCO)thin films have been prepared by spin coating method using photosensitive sol solution. $Sr(OC_2H5)_2$, $Bi(TMHD)_3$ and $Ta(OC_2H)_5)_5$ were used as starting materials for SBT solution and $La(OCH_2CH_2OCH_3)_3$, $Sr(OC_2H_5)_2$, $CO(OCH_2CH_2OCH_3)_2$ were used for LSCO solution. Solubility difference by UV irradiation on LSCO thin film allows to obtain a fine patterning due to M-O-M bond formation. The lowest resistivity($4{\times}10^{-3}{\Omega}cm$) of LSCO thin films was obtained by annealing at $740^{\circ}C$.

• 디지털융복합연구
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• 제18권2호
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• pp.223-233
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• 2020

최근 연구흐름은 창업에 대한 성공은 창업자의 특성뿐만 아니라 무엇인가를 이루어 내는 자신감인 자기 효능감에 따라 성과가 달라 질 수 있다는 것이다. 따라서 본 논문의 연구목적은 첫째, 창업자 특성이 자기효능감과 창업성과에 미치는 영향을 살펴보고, 둘째, 창업자의 실무경험과 창업교육기간에 따라 창업자 특성이 자기효능감에 주는 영향이 달라진다는 조절효과를 분석하고, 마지막으로 이를 통해 창업 성과를 극대화하기 위한 방안을 제시하고자 하는 것이다. 프랜차이즈 가맹점을 제외한 274개의 일반 독립점포로부터 자료를 수집하여 구조방정식으로 연구모형과 17개의 연구가설을 검증하였다. 분석 결과 첫째, 창업자 특성 중 심리적 특성인 성취욕구와 위험감수성은 자기효능감에 정(+)의 영향을 주었다. 둘째, 창업 전 실무경험과 창업교육이수에 대한 조절효과를 확인해 본 결과, 창업 전 실무경험은 기술적 능력과 마케팅 능력을 통하여 자기효능감을 조절하는 것으로 확인되었으며, 창업교육은 성취욕구, 위험감수성, 기술적 능력, 마케팅 능력 등과 더불어 조절효과를 만들어내었다.

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.304-304
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• 2006

The possibility to develop optoelectronic devices with improved properties by controlling the degree of organization at the molecular level of organic materials has been driving the design of new ${\pi}-conjugated$ systems. In particular, the organization by self-assembling processes (${\tilde{\Box}}{\d{\Box}}}$ interactions, hydrogen bonding) of well-defined oligomeric systems such as disubstituted oligothiophene derivatives has been demonstrated as a promising approach to conjugated materials with a high degree of structural order of the constituent building blocks. The self-organization of conjugated building blocks in solution or on surfaces, leading to the construction of nanoscopic and mesoscopic architectures, represents a starting point for the construction of molecular electronics or even circuits, through surface patterning with nanometer-sized objects.

• 성인간호학회지
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• 제26권5호
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• pp.489-499
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• 2014

Purpose: The purpose of this study was to examine the effects of delirium care training program on the nurses' knowledge of delirium, self-confidence and performance levels in caring patients with delirium. Methods: The study was used a quasi-experimental design. The participants were 131 nurses in general nursing units in B and J hospitals. Sixty four nurses in B hospital were allocated into the experimental group and 67 nurses from J hospital into the control group. The delirium care training program was composed of lecture and clinical practice. Clinical practice of delirium care was applied everyday for 4 consecutive weeks starting from the admission day of the older adults(${\geq}70$ years old), using 'short CAM' and 'nursing checklist for delirium prevention'. Results: The knowledge of delirium, self-confidence in caring patients, and performance levels of nursing care were significantly increased in the experimental group compared to the control group. Conclusion: The findings of this study provided the evidence for the potential utility of the delirium care training program and underscored the needs of broader application of the training program of delirium care for nurses in general nursing units.

• Journal of applied mathematics & informatics
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• 제24권1_2호
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• pp.437-448
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• 2007

Suppose K is a nonempty closed convex nonexpansive retract of a real uniformly convex Banach space E with P as a nonexpansive retraction. Let $T_1,\;T_2\;and\;T_3\;:\;K{\rightarrow}E$ be nonexpansive mappings with nonempty common fixed points set. Let $\{\alpha_n\},\;\{\beta_n\},\;\{\gamma_n\},\;\{\alpha'_n\},\;\{\beta'_n\},\;\{\gamma'_n\},\;\{\alpha'_n\},\;\{\beta'_n\}\;and\;\{\gamma'_n\}$ be real sequences in [0, 1] such that ${\alpha}_n+{\beta}_n+{\gamma}_n={\alpha}'_n+{\beta'_n+\gamma}'_n={\alpha}'_n+{\beta}'_n+{\gamma}'_n=1$, starting from arbitrary $x_1{\in}K$, define the sequence $\{x_n\}$ by $$\{zn=P({\alpha}'_nT_1x_n+{\beta}'_nx_n+{\gamma}'_nw_n)\;yn=P({\alpha}'_nT_2z_n+{\beta}'_nx_n+{\gamma}'_nv_n)\;x_{n+1}=P({\alpha}_nT_3y_n+{\beta}_nx_n+{\gamma}_nu_n)$$ with the restrictions $\sum^\infty_{n=1}{\gamma}_n<\infty,\;\sum^\infty_{n=1}{\gamma}'_n<\infty,\; \sum^\infty_{n=1}{\gamma}'_n<\infty$. (i) If the dual $E^*$ of E has the Kadec-Klee property, then weak convergence of a $\{x_n\}$ to some $x^*{\in}F(T_1){\cap}{F}(T_2){\cap}(T_3)$ is proved; (ii) If $T_1,\;T_2\;and\;T_3$ satisfy condition(A'), then strong convergence of $\{x_n\}$ to some $x^*{\in}F(T_1){\cap}{F}(T_2){\cap}(T_3)$ is obtained.

• 전력전자학회논문지
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• 제23권1호
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• pp.1-8
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• 2018

A problem exists in the conventional transportation cart applications, in which an external power supply with mechanical contact connection (bus bar connection) is required to drive the motor. Therefore, continuous effort for maintenance is required, aside from the expensive bus bar connector. To solve this problem, a self-electricity-generated transportation cart system without bus bar has recently been introduced. In this system, a battery needs to store the power of the generated wheel, and a boost converter, which converts the low battery voltage to high bus voltage to drive the motor inverter, is necessary. However, since the instantaneous large current required for starting the motor is supplied from the battery, a battery with large size and volume should be adopted to withstand this large current. In this study, a boost converter that can supply a large instantaneous current by using super Capacitor string is proposed. The proposed converter can be realized with a small size and volume compared with the conventional battery-fed boost converter. Operational principles, analysis, and design of the proposed converter are presented, and experimental results are provided to validate the proposed converter.

• 한국재료학회지
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• 제24권5호
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• pp.249-254
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• 2014

Due to their unique properties, tungsten borides are good candidates for the industrial applications where certain features such as high hardness, chemical inertness, resistance to high temperatures, thermal shock and corrosion. In this study, conditions were investigated for producing tungsten boride powder from tungsten oxide($WO_3$) by self-propagating high-temperature synthesis (SHS) followed by HCl leaching techniques. In the first stage of the study, the exothermicity of the $WO_3$-Mg reaction was investigated by computer simulation. Based on the simulation experimental study was conducted and the SHS products consisting of borides and other compounds were obtained starting with different initial molar ratios of $WO_3$, Mg and $B_2O_3$. It was found that $WO_3$, Mg and $B_2O_3$ reaction system produced high combustion temperature and radical reaction so that diffusion between W and B was not properly occurred. Addition of NaCl and replacement of $B_2O_3$ with B successfully solved the diffusion problem. From the optimum condition tungsten boride($W_2B$ and WB) powders which has 0.1~0.9 um particle size were synthesized.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.539-541
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• 2022

코로나 팬데믹의 장기화로 자영업자들의 폐업률이 급증하고, 경제적 피해가 심해지고 있다. 본 연구에서는 코로나19 발생에 따른 충청북도 상권 창폐업 분석을 통해 지역별, 업종별 과밀 정도 등 다양한 정보를 제공하고 창업 성공 및 경영안정에 도움을 주기 위하여 공공데이터를 활용하여 창업환경을 분석하고 창폐업 현황을 제공하여 자영업자들이 창업 시 기초자료로 활용하도록 지원하였다.

• 여성건강간호학회지
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• 제7권2호
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• pp.212-228
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• 2001

This is a cross-sectional descriptive correlation study that aimed to understand the relationship between the level of sexual contacts during the dates and psycho-social factors in teenage girls who have or had boyfriends. The purpose of this study was to describe the relationship between sexual contacts and self-esteem and self- assertiveness. The subjects of the study were 6,130 teenage girls who have or had boyfriends. They were selected convienently 12,733 teenage girls from 254 secondary schools located in 7 large cities and 9 provinces in Korea. A structured questionaire was used it included items one general characteristics, the levels of sexual contacts, self-esteem and self-assertiveness. Seven levels of sexual contacts were rated they were holding a hand, putting arms around each other's shoulders, kiss, french kiss, touching breast, petting genitalia, and sexual intercourse during the dates. Self-esteem and self-assertiveness were measured by the "Self-esteem scale" of Rogenberg (1971) and the questionaires developed by S. B. Chang et al(2000), respectively. The self-reported questionaires were collected from October 2, to October 28, 2000 and analyzed by using SPSS 10.0 Program. The data were analyzed by descriptive statistics, reliability, One-way ANOVA with Duncan method & Scheffe method. The results of the analysis were as follows. 1.An average Percentage of the respondents who have (46.1%) or had (53.9%) boyfriends was 48.1% (n=6,130) and the most common sexual contact during the dates was french kiss (26.7%, n=1,634). While 7.5%(458) of respondents had a sexual intercourse, 13.7%(842) of respondents didn't have any sexual contact during the dates. 2. Distribution of starting point of the first sexual contact demonstrates that 1,950 respondents (31.8%) held partner's hand at the first date and 1,367 respondents (22.3%) put arms around each other's shoulders at the 2nd or 3rd date. Sexual contacts such as kiss, french kiss, touching breast, petting genitalia, or sexual intercourse were experienced mostly at the later than the 10th date. However, surprisingly large number(1.7%) of respondents had genital contact and sexual intercourses at the first date. 3. The means of self-esteem and self-assertiveness socres of the respondents who have or had boyfriends are 27.43$({\pm}4.03)$ and 17.96$({\pm}2.55)$, respectively. The range of scores for self esteem was 10-40, 40 with most self esteem. The range of scores for self assertiveness was 7-21, 21 with most self assertiveness. 4. As sexual contacts proceeded, the means of self-esteem and self-assertiveness values decreased. In detail, the respondents having no or light sexual contacts (kiss, putting arms around each other's shoulder, holding a hand) had similar self-esteem values($p{\leq}0.05$). However, ones having relatively intensive sexual contacts (french kiss, touching breast) showed significantly lower self-esteem values($p{\leq}0.05$). Same trend has been obtained for self-assertiveness value. 5. The higher values of self-esteem and self-assertiveness values the respondents had, the later they started the moderate sexual contact (kiss, french kiss) during the dates. Interestingly, among the respondents having intensive sexual contacts (petting genitalia, sexual intercourse) during the dates, those who experienced the such contacts at the first date or later than 10th date have higher self-esteem and self-assertiveness values than one experienced the such contacts during the 2nd$\sim$9th dates, giving U-shape curve. 6. There was a significant relationship between self-esteem and self-assertiveness in girls who have or had boyfriends($P{\leq}.001$). In conclusion, the research shows that self-esteem and self-assertiveness values are significantly related with the sexual contacts of the teenage girls who have or had boyfriends. These results strongly suggest that proper sex education program for teenage girls should contain the program on improving the self-esteem and self-assertiveness. We believe that sex education program is the one of the best ways to prevent the unwanted sexual contacts and pregnancy of teenage girls.

• 벤처혁신연구
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• 제2권1호
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• pp.93-118
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• 2019

본 연구는 시니어의 기술 스트레스와 자기효능감이 창업의지에 어떠한 영향을 미치는지 알아보고, 나아가 회복탄력성이 이들 간에 매개역할을 하는지를 실증적인 분석을 통해 알아보았다. 이 연구의 모집단은 만 40세 이상의 남녀 시니어 (예비)창업자들로, 207명에게 설문조사를 실시하였다. 결과분석은 IBM SPSS Statistics 24.0 통계 패키지 프로그램을 이용하였고, 빈도분석, 탐색적 요인분석, 상관관계 분석 및 가설검정을 위한 위계적 회귀분석을 실시하였다. 실증적 연구 분석결과, 첫째, 기술 스트레스는 시니어의 창업의지에 영향을 미치는 것으로 나타났다. 둘째, 자기효능감은 시니어의 창업의지에 영향을 미치는 것으로 나타났다. 셋째, 회복탄력성은 기술 스트레스와 시니어의 창업의지 간에, 또 자기효능감과 시니어의 창업의지 간에 부분매개 영향을 미치는 것으로 나타났다. 이러한 연구결과는 시니어의 창업의지를 극대화하는데 자기효능감이 핵심적 역할을 한다는 선행이론을 지지하였고, 시니어들이 창업의지를 가지고 창업활동을 촉진하기 위한 선행변수로서 자기효능감의 중요성을 입증했다. 나아가 새롭게 독립변수로 투입된 기술 스트레스도 자기효능감 다음으로 중요한 요소임이 확인되었다. 또, 회복탄력성이 간접적인 매개역할을 하고 있음을 확인했다는 점에 연구 의의가 있었다. 단, 기술 스트레스가 창업의지에 영향을 미치는 것으로 나타났으나, 긍정적인 관계로 나타나 이에 대한 추가적 연구가 필요시 된다.