• 한국정보통신학회논문지
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• 제25권3호
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• pp.412-418
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• 2021

본 연구는 스마트폰 제품디자인에서 감성공학 요소가 브랜드 선호도와 충성도에 미치는 영향을 알아보고자 한다. 감성공학 요소를 색상, 성능, 사용성, 가치, 신뢰성으로 나누고, 브랜드 선호도와 충성도의 관련성을 실증 분석하였다. 분석결과 스마트폰 제품디자인에서 감성공학 요소는 브랜드 선호도에 정적 영향을 미치며 영향력이 큰 요소는 성능, 색상 요소로 나타났다. 스마트폰 제품디자인에서 감성공학 요소는 충성도에 정적 영향을 미치며 영향력이 큰 요소는 신뢰성, 성능 요소로 나타났다. 제품디자인에서 브랜드 선호도가 높을수록 충성도에 영향을 크게 미친다. 제품디자인 감성공학 요소 중에서 영향력이 있는 요소를 파악함으로써 소비자들의 특성에 맞는 제품디자인에 관한 접근이 필요하다.

• Geomechanics and Engineering
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• 제30권3호
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• pp.259-272
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• 2022

Rockburst is a dynamic, multivariate, and non-linear phenomenon that occurs in underground mining and civil engineering structures. Predicting rockburst is challenging since conventional models are not standardized. Hence, machine learning techniques would improve the prediction accuracies. This study describes decision based uncertainty models to predict rockburst in underground engineering structures using gradient boosting algorithms (GBM). The model input variables were uniaxial compressive strength (UCS), uniaxial tensile strength (UTS), maximum tangential stress (MTS), excavation depth (D), stress ratio (SR), and brittleness coefficient (BC). Several models were trained using different combinations of the input variables and a 3-fold cross-validation resampling procedure. The hyperparameters comprising learning rate, number of boosting iterations, tree depth, and number of minimum observations were tuned to attain the optimum models. The performance of the models was tested using classification accuracy, Cohen's kappa coefficient (k), sensitivity and specificity. The best-performing model showed a classification accuracy, k, sensitivity and specificity values of 98%, 93%, 1.00 and 0.957 respectively by optimizing model ROC metrics. The most and least influential input variables were MTS and BC, respectively. The partial dependence plots revealed the relationship between the changes in the input variables and model predictions. The findings reveal that GBM can be used to anticipate rockburst and guide decisions about support requirements before mining development.

• 스마트미디어저널
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• 제10권4호
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• pp.102-110
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• 2021

현재 국내 건설기술의 발전을 도모하기 위해 건설신기술 지정 제도를 운영하고 있다. 이 제도를 통해 지정된 건설신기술과 관련하여 중요도가 높은 출현 어휘와 어휘들 간의 관계를 분석함으로써 건설신기술에 내재된 암묵적인 의미를 살펴보고자 하였다. 이를 위해 918건의 건설신기술정보를 수집하였다. 수집된 건설신기술의 고시연도와 요약 내용을 기초로 하여 건설신기술별로 출현어휘의 중요도를 측정하였다. LDA 모형을 기반으로 한 4개의 토픽별로 연관된 어휘들 간의 영향정도를 평가하였다. 기술적용분야에 따른 토픽을 분석하였다. 1990년부터 2021년까지의 토픽별로 영향력이 높은 어휘들의 변화 추이를 유추하였다. 향후 환경·기계·설비 토픽과 구조물의 보수 보강 토픽의 영향정도 변화와 이에 관련한 적용기술 분야를 예측하였다. 토픽의 개발방향을 예측하였다.

• 한국융합학회논문지
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• 제13권2호
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• pp.223-233
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• 2022

본 연구는 지각된 취약성(Perceived Susceptibility)에 있어서 왜곡현상이라고 할 수 있는 낙관적 편견 외에, 지각된 통제성(Percived Controllbility)에 있어서의 왜곡현상인 통제성 편향(Illusion of Control)을 포함하여 이들 두 변인이 COVID 19 관련 개인방역행동 및 사회적 거리두기 실천과 어떠한 영향관계를 가지는지 검증하고자 하였다.이를 위해 마크로밀 엠브레인의 온라인 패널을 활용하여 설문조사를 실시하였으며, 마스크 착용, 손씻기, 손소독제 사용 등의 개인방역행동을 독립변인으로 하여, 통제성 편향과 낙관적 편견에 어떻게 영향을 주는지를 분석하고, 아울러 낙관적 편견이 사회적 거리두기에 어떠한 영향을 주는지를 회귀분석방법을 통해 분석하였다. 분석 결과, COVID 19 개인방역행동 중 손씻기 실천을 제외하고는 통제성 편향에 유의적인 영향을 주고 있지 않았다. 본 연구에서는 통제성 편향이 낙관적 편견에 영향을 주는 변인인 것으로 나타났으며, 특히 성별과 연령 등 인구학적 변인에 따라 개인방역행동이 통제성 편향에 주는 영향, 통제성 편향이 낙관적 편향에 주는 영향, 그리고 낙관적 편향이 사회적 거리두기에 주는 영향이 다르게 나타났다. 이는 향후 사회적 거리두기 촉진을 위한 개입 프로그램을 마련하는 과정에서 타겟별 차별화된 전략 및 메시지를 마련할 수 있는 근거를 제시해 줄 수 있을 것으로 보인다.

• 한국간호교육학회지
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• 제28권4호
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• pp.411-420
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• 2022

Purpose: The purpose of this study was to identify the factors influencing nursing students' caring efficiency. Methods: This study included 212 nursing students from three University nursing departments in Busan metropolitan city. Data were collected from September 1 to September 29, 2021, using self-report questionnaires. For data analysis, descriptive statistics, independent t-test, one-way ANOVA, Pearson's correlation coefficient, and hierarchical multiple regression analyses were conducted with SPSS version 24.0. Results: Positive psychological capital and interpersonal competence on the relationship and character of nursing students were positively correlated with caring efficiency. The variables affecting the caring efficiency of the subjects were character (β=.60, p<.001), amount of participation in a character development program (5 times or more) (β=.16, p=.023), levels of stress (moderate β=.13, p=.037; low β=.15, p=.015), motivation to apply to a nursing program (β=.12, p=.024), and volunteer experience (β=.11, p=.038). The total explanatory power of the variables was 50.0% (F=14.69, p<.001). Conclusion: Character was one of the biggest influential factors on caring efficiency. In order to improve nursing students' caring efficiency, above all, it is necessary to make efforts to raise the level of individual character.

• 여성건강간호학회지
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• 제28권1호
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• pp.46-55
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• 2022

Purpose: This study aimed to determine the level of postpartum posttraumatic stress disorder (PTSD) and postpartum depression (PPD) in Korean mothers with healthy babies and to explore the factors related to postpartum PTSD. Methods: This study used a longitudinal survey design to explore the levels and association of PPD and PTSD. Two hundred women were recruited during pregnancy and the data were collected via online survey from 166 mothers (84% retained) who gave birth to healthy babies, at two postpartum periods: Fear of childbirth was assessed at the 1st week; and spousal support, PPD, and postpartum PTSD were surveyed at the 4th week postpartum. Descriptive statistics, t-test, one-way analysis of variance, Chi square test, and multiple regression were done. Results: The mean age of mothers was 33.12 (±3.97) years old. Postpartum PTSD was low (8.95±6.49) with 1.8% (n=3) at risk (≥19). PPD was also low (6.68±5.28) and 30.1% (n=50) were identified at risk (≥10). The comorbid rate of PPD with PTSD was 6%. Mothers who did not have a planned pregnancy had higher scores of PPD (t=-2.78, p=.008), whereas spousal support and PPD had negative relationship (r=-.21, p=.006). The overall explanatory power for postpartum PTSD was 55.2%, of which PPD was the only significant variable (β=. 76, t=13.76, p<.001). Conclusion: While only 1.8% was at risk of postpartum PTSD at 4 weeks postpartum, PPD prevalence was 30.1% and PPD was the only influential factor of postpartum PTSD. Assessment and counseling of PPD are required as well as screening for postpartum PTSD. More research is also needed on postpartum PTSD in Korean women.

• 국제지역연구
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• 제13권1호
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• pp.189-217
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• 2009

본 연구는 중국 소비자를 대상으로 소비자와 기업 간의 동일시정도가 한국제품에 대한 평가와 소비자의 행위적 반응에 미치는 영향에 대하여 알아보고 있다. 또한 기업-소비자 동일시에 영향을 미치는 요인들로 기업의 능력과 기업의 사회적 책임이행이라는 두 가지 기업이미지 변수를 선정하고 이들이 기업-소비자 동일시 정도에 미치는 차별적인 영향도 구조방정식 모형을 통하여 함께 분석하고 있다. 실증분석 결과를 요약하면 다음과 같다. 첫째, 기업의 능력과 기업의 사회적 책임이행은 전반적으로 기업-소비자 동일시에 긍정적인 영향을 미치는 것으로 나타났다. 둘째, 한국기업에 대한 중국 소비자들의 기업-소비자 동일시는 한국제품에 대한 평가에, 한국제품에 대한 호의적인 평가는 중국 소비자들의 행위적 반응에 모두 긍정적인 영향을 미치는 것으로 나타났다. 이러한 연구결과는 앞으로 중국시장에 진출한 한국기업들이 장기적이고 지속적인 소비자와의 관계를 유지하기 위하여 기업의 능력을 높이는 것도 중요하지만 기업의 사회적 책임을 충실히 이행하는데 더 많은 노력을 기울여야 함을 시사한다.

• 한국의사학회지
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• 제35권1호
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• pp.135-147
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• 2022

Sin Dae-woo was a scholar representing the Ganghwa School in the late Joseon Dynasty. He was Jeong Je-du's grandson-in-law and also in charge of organizing Jeong Je-du's collection of writings. His three sons had a particularly close relationship with their father, so even when they published a collection of writings after his father's death, the names of the three were combined and marked as Jin-jak-shin. The records they left include Seokcheon Il-seung, who described the history of the family along with the collection of writings, Seongdo Il-rok, a diary of the time of Seongcheon Busa, and many letters exchanged over time. These records draw attention as they contain records of medical life, such as eye diseases that the family suffered, infectious diseases that caused many casualties, and Yakro (distilled herbal essence) that showed records of being used for treatment at the time. In this paper: 1) We examine the medicines, prescriptions, acupuncture, and medication used to treat eye diseases. 2) We carefully examine the epidemic, the responses of the parties to it, and the attitudes of those who stood at the boundary between death and life. 3) We look for clues to the use of Western-origin drugs called Yakro. Intellectuals of the time looked deeper into Lee Kyugyung's book and Seo Yu-gu's book on how they were reflected in Joseon's medical life. In conclusion, in the 18th and 9th centuries, we see that the influential families of the Ganghwa school freely brought in famous acupuncturists, used prescriptions that were included in medical books or not, and used Yakro from western origin that were not traditional methods of Joseon. Thus, we reveal that doctors of the Joseon had the capacity to pursue their medical life more actively and had open-minded exchanges than our existing perceptions.

• Computers and Concrete
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• 제32권6호
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• pp.577-594
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• 2023

Engineered cementitious composites with calcined clay limestone cement (LC³-ECC) as a kind of green, low-carbon and high toughness concrete, has recently received significant investigation. However, the complicated relationship between potential influential factors and LC³-ECC compressive strength makes the prediction of LC³-ECC compressive strength difficult. Regarding this, the machine learning-based prediction models for the compressive strength of LC³-ECC concrete is firstly proposed and developed. Models combine three novel meta-heuristic algorithms (golden jackal optimization algorithm, butterfly optimization algorithm and whale optimization algorithm) with support vector regression (SVR) to improve the accuracy of prediction. A new dataset about LC³-ECC compressive strength was integrated based on 156 data from previous studies and used to develop the SVR-based models. Thirteen potential factors affecting the compressive strength of LC³-ECC were comprehensively considered in the model. The results show all hybrid SVR prediction models can reach the Coefficient of determination (R²) above 0.95 for the testing set and 0.97 for the training set. Radar and Taylor plots also show better overall prediction performance of the hybrid SVR models than several traditional machine learning techniques, which confirms the superiority of the three proposed methods. The successful development of this predictive model can provide scientific guidance for LC³-ECC materials and further apply to such low-carbon, sustainable cement-based materials.

• Human Ecology Research
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• 제62권1호
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• pp.15-32
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• 2024

The purpose of this study was to analyze the research trends and co-author networks of academic articles published in the Journal of the Korean Home Economics Association from 2010 to 2022. The network analysis was conducted using Excel and NetMiner 4.4, and the results were as follows. First, the number of published articles has been maintained at around 40 per year since 2019. By field, most articles were published in the field of child studies and family studies, followed by consumer studies, home management, clothing studies, home economics education, food and nutrition, and housing. The research methods were primarily quantitative (71.61%). Second, the most common keywords in the titles of the published articles were "influence" and "relationship", with "influence", "consumer", "mediating effect", "parent", and "control" identified as influential keywords. Third, the published articles were categorized into nine topics based on subject matter, while the number of topic types varied by year. Fourth, the total number of authors of the 627 articles was 712, with 1.92 authors per article, as well as the number of authors who published two or fewer articles accounted for 85.5% of the total. By institution, Yonsei University had the highest number of authors and the highest number of published articles, while Korea National Open University played a leading role in the network of co-authors by institution. This study is significant in providing basic data for the future development of the Korean Home Economics Association and the field of home economics.