• 디지털융복합연구
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• 제12권2호
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• pp.363-372
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• 2014

본 연구는 임상실습을 앞두고 있는 간호대학생의 자기효능감, 전공만족도 및 간호윤리 가치관을 파악하고 상관관계를 비교분석함으로써, 학생들의 올바른 간호윤리 가치관확립을 위한 교육과정 개설에 기초자료를 제공하고자 시도되었다. 본 연구의 대상은 C시 소재 두 개 간호대학생 275명을 편의 표집하여 구조화된 설문지를 통해 자료를 수집하였고 자료는 SPSS/WIN 18.0 program을 이용하여 t-test, ANOVA, Bonferroni 사후검정을 실시하였으며, 각 변수간의 관계를 분석하기 위해 Pearson's correlation coefficient를 산출하였다. 연구결과, 자기효능감, 전공만족도는 중간 이상이었으며 간호윤리 가치관은 의무주의 입장을 취하고 있었다. 그리고 자기효능감과 간호윤리 가치관, 전공만족도와 대상자영역은 매우 낮은 상관관계로 나타났으며 자기효능감과 전공만족도는 유의한 양의 상관관계를 보였다. 따라서 간호학생들의 자기효능감을 향상시키고 지속시킬 수 있는 교육프로그램을 다양하게 개발하여 간호전문직에 대한 만족도를 높이고 확고한 간호윤리 가치관을 수립하도록 하는 것이 절실히 요구된다.

• 한국식생활문화학회지
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• 제35권2호
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• pp.173-180
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• 2020

This study evaluated methods of improving sustained learning participation by examining the structural relationship of school support consisting of professor support, friend-senior support and educational environment support, career decisionmaking self-efficacy, school satisfaction, and learning persistence depending on the characteristics of college students majoring in culinary art and food service. The study findings were as follows. First, the general characteristics of college students majoring in culinary art and food service were perceived significantly more by female students than by male students. Second, school support directly influenced the career decision-making self-efficacy and school satisfaction, but did not directly influence the learning persistence. Instead, school support influenced school satisfaction and learning persistence indirectly by the medium of career decision-making self-efficacy. Third, career decision-making self-efficacy directly influenced school satisfaction and learning persistence and indirectly influenced learning persistence by the medium of school satisfaction. Lastly, school satisfaction directly influenced the learning persistence, implying that school satisfaction is an important factor for the learning persistence of college students majoring in culinary art and food service. These results show that, because school members and environmental support cannot exclusively make learning persistence, diverse systems and programs must be developed and applied to improve the career decision-making self-efficacy and school satisfaction of college students majoring in culinary art and food service.

• Computers and Concrete
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• 제5권6호
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• pp.573-597
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• 2008

Among artificial intelligence-based computational techniques, adaptive neuro-fuzzy inference systems (ANFIS) are particularly suitable for modelling complex systems with known input-output data sets. Such systems can be efficient in modelling non-linear, complex and ambiguous behaviour of cement-based materials undergoing single, dual or multiple damage factors of different forms (chemical, physical and structural). Due to the well-known complexity of sulfate attack on cement-based materials, the current work investigates the use of ANFIS to model the behaviour of a wide range of self-consolidating concrete (SCC) mixture designs under various high-concentration sodium sulfate exposure regimes including full immersion, wetting-drying, partial immersion, freezing-thawing, and cyclic cold-hot conditions with or without sustained flexural loading. Three ANFIS models have been developed to predict the expansion, reduction in elastic dynamic modulus, and starting time of failure of the tested SCC specimens under the various high-concentration sodium sulfate exposure regimes. A fuzzy inference system was also developed to predict the level of aggression of environmental conditions associated with very severe sodium sulfate attack based on temperature, relative humidity and degree of wetting-drying. The results show that predictions of the ANFIS and fuzzy inference systems were rational and accurate, with errors not exceeding 5%. Sensitivity analyses showed that the trends of results given by the models had good agreement with actual experimental results and with thermal, mineralogical and micro-analytical studies.

• Macromolecular Research
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• 제15권7호
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• pp.623-632
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• 2007

Thermosensitive nanoparticles were prepared via the self-assembly of two different $poly({\varepsilon}-caprolactone)$-based block copolymers of poly(N-isopropylacrylamide)-b-$poly({\varepsilon}-caprolactone)$ (PNPCL) and poly(ethylene glycol)-b-$poly({\varepsilon}-caprolactone)$ (PEGCL). The self-aggregation and thermosensitive behaviors of the mixed nanoparticles were investigated using $^1H-NMR$, turbidimetry, differential scanning microcalorimetry (micro-DSC), dynamic light scattering (DLS), and fluorescence spectroscopy. The copolymer mixtures (mixed nanoparticles, M1-M5, with different PNPCL content) formed nano-sized self-aggregates in an aqueous environment via the intra- and/or intermolecular association of hydrophobic PCL chains. The microscopic investigation of the mixed nanoparticles showed that the critical aggregation concentration (cac), the partition equilibrium constants $(K_v)$ of pyrene, and the aggregation number of PCL chains per one hydrophobic microdomain varied in accordance with the compositions of the mixed nanoparticles. Furthermore, the PNPCL harboring mixed nanoparticles evidenced phase transition behavior, originated by coil to the globule transition of PNiPAAm block upon heating, thereby resulting in the turbidity change, endothermic heat exchange, and particle size reduction upon heating. The drug release tests showed that the formation of the thermosensitive hydrogel layer enhanced the sustained drug release patterns by functioning as an additional diffusion barrier.

• 아태비즈니스연구
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• 제14권1호
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• pp.195-214
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• 2023

Purpose - This study aims to investigate the factors (experience value, social capital, cultural capital) affecting users' engagement in UGC platform, and to examine their effect on relationship commitment. The study further attempted to confirm the moderating effect of the need for self-expression. Design/methodology/approach - Data was collected from 230 UGC users through a survey, and the study performed a structural equation model analysis to validate the conceptual model which contains five research hypotheses. Findings - The study found that only service value, one of experiential values, has a significant positive (+) effect on customer engagement and that social capital and cultural capital also have a significant positive (+) effect on customer engagement In addition, customer engagement in the UGC platform was found to have a significant positive (+) effect on the relationship commitment. However, the need for self-expression did not moderate the relationship between customer engagement and relationship commitment. Research implications or Originality - Marketing strategies that can strengthen UGC users' engagement factors can lead up to follow-up research, which finds ways to improve not only users' engagement but also sustained relationship with the UGC platforms.

• 한국안전학회지
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• 제39권3호
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• pp.7-13
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• 2024

This study examines the physical characteristics of self-regulating heating cables caused by increased temperature and fire risk due to local degradation. A thermo hygrostat system, a convection dryer, a digital multimeter (Agilent 34465 A), NI DAQ, and the LabVIEW program were used to assess the physical properties in response to temperature fluctuations. As the temperature increases, the resistance of the self-regulating heating cable increases; however, when the critical point is exceeded, the resistance sharply decreases. A problem arises when the resistance value cannot return to its original state even though the temperature is lowered to the initial state. Moreover, when the ambient temperature rises while power is applied, the resistance value initially increases, and the flowing current decreases, maintaining a constant state. However, when the critical temperature is exceeded, the flowing current increases because of a rapid decrease in the resistance value, progressing to ignition. When the resistance value decreases because of the deterioration of one local area, the total resistance value becomes less than the initial resistance value. Therefore, the flowing current increases and an ignition problem occurs at one location where deterioration occurs. Despite the sustained flames and arcs resulting from the changes in the overall physical properties of the self-regulating heating cable and resistance variations due to local decline, the fire continued as the flowing current was lower than the operating current of the circuit breaker, failing to cut the power. In the case of self-regulating heating cables and heating wires, which are the leading causes of fires in winter, efforts are needed to ensure the need for periodic maintenance and the use of KS-certified products.

• 디지털융복합연구
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• 제13권12호
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• pp.453-460
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• 2015

본 연구는 주부의 걷기운동의 참여가 자아존중감과 스트레스 및 우울증개선에 어떠한 영향을 미치는지를 규명하는데 있다. 연구대상으로 30대 후반에서 40대 중반의 주부 24명(실험집단 12명, 통제집단 12명)을 선정하여, 걷기운동을 15주동안 주3회씩 총45회, 1일 지속운동시간을 30분 이상, 1일 일만보로 하여 실시하였다. 연구결과 자아 존중감, 스트레스, 우울증 개선에 집단간 주효과와 측정시점에 대한 주효과에 유의한 차이가 나타났다. 또한 측정시점과 집단의 상호작용효과에 유의한 차이가 나타났다. 결론적으로 지속적인 운동경험이 없는 주부에게 걷기운동의 참여가 자아존중감, 스트레스, 우울증 개선에 긍정적인 효과가 있는 것으로 나타났다. 이는 규칙적인 신체활동이 융복합측면에서 정서발달에 긍정적인 영향을 미치므로, 주부들은 지속적으로 신체활동에 참여할 필요가 있음을 시사하고 있다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2005년도 춘계학술대회
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• pp.416-421
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• 2005

Most of solar system dissemination has been focused on domestic hot water system of which utilization to a building is relatively simple and safe than solar heating system. Through the survey on a cause of solar house dissemination failure in Korea, we conclude that design integration and systematic approach method for technology application are the most important element for a successful solar house. KIER(Korea Institute of Energy Research) and Hanbat National University have started new project on a development of Zero energy Solar House, called ZeSH which can be sustained just by natural energy without the support of existing fossil fuel. This is the 1st phase research of 10 years long-term ZeSH plan which develops a low-cost and $100\%$ self sufficient ZeSH. The goal of 1st phase ZeSH research is to get a $70\%$ self sufficiency only in thermal loads. Actual demonstration house, named KIER ZeSH I was designed and constructed as a result of 1st phase research work in the end of 2002. Various innovative technologies such as super insulation, high performance window, passive and active solar systems, ventilation heat recovery system are applied and evaluated to the KIER ZeSH I. A lot of computer simulations had been conducted for the optimal design and system integration in every design steps. Considering all the results from detailed hourly computer simulation, it is expected that at least $70\%$ self-sufficiency in thermal loads which is 1st phase target value can be excessively achieved in actual demonstration house. Besides, many valuable findings from the design and analysis to construction could be established such as collaboration method among the participants, practical design and construction techniques for system integration and the others. The purpose of this paper is to introduce the main findings through the development of KIER ZeSH I project. Practical guidelines in every design step for new low- or zero- energy solar house is proposed as result.

• 치위생과학회지
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• 제17권5호
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• pp.405-412
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• 2017

The purpose of this study was to examine whether a gratitude training program for preservice dental hygienists affects their gratitude disposition, self-esteem, and happiness. Dental hygiene students were recruited from a college in D and administered a pretest. The 76 selected participants were primarily those who had never written a gratitude journal. Participants were then randomly divided into an experimental group and a control group. Three participants failed to complete the program, leaving 73 subjects in the final analysis. Data were analyzed using the ${\chi}^2$ test, independent sample t-test, and analysis of covariance. The mean gratitude disposition score improved from $31.11{\pm}5.55$ in the pretest to $34.41{\pm}4.38$ in the posttest in the experimental group and from $31.44{\pm}4.41$ to $32.06{\pm}4.63$ in the control group. The mean self-esteem score improved from $31.22{\pm}4.03$ to $33.16{\pm}3.44$ in the experimental group and from $30.53{\pm}4.42$ to $30.97{\pm}3.80$ in the control group. The mean happiness score improved from $19.54{\pm}2.64$ to $21.78{\pm}2.43$ in the experimental group and from $19.64{\pm}3.32$ to $20.08{\pm}2.91$ in the control group. All of the participants improved their gratitude disposition, self-esteem, and happiness scores while participating in the gratitude training program, and it is expected that if such positive emotions can be sustained, they will naturally acquire the basic requirements of dental hygienists and build a better vocational consciousness and a higher sense of duty, as well as have a further positive effect on the quality of dental medical service. Further studies should be conducted to propose a concrete plan to expand and operate this gratitude training program more effectively.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2182-2186
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• 2003

This paper presents the differential type resonant accelerometer (DRXL) and its performance test results. The DRXL is the INS grade, surface micro-machined sensor. The proposed DRXL device produces a differential digital output upon an applied acceleration, and the principle is a gap-dependent electrical stiffness variation of the electrostatic resonator with torsion beam structures. Using this new operating concept, we designed, fabricated and tested the proposed device. The final device was fabricated by using the wafer level vacuum packaging process. To test the performance of the DRXL, a nonlinear self-oscillation loop is designed using describing function technique. The oscillation loop is implemented using discrete electronic elements. The performance test of the DRXL shows that the sensitivity of the accelerometer is 12 Hz/g and its long term bias stability is about $2mg(1{\sigma})$. The turn on repeatability, bandwidth, and dynamic range are 4.38 mg, 100 Hz, and ${\pm}\;70g$, respectively.