• 한국콘텐츠학회논문지
• /
• 제16권1호
• /
• pp.190-203
• /
• 2016

본 연구는 사회복지현장에서 체계적 경력과정이 개인과 조직 모두의 성공적 성과달성의 핵심적 요소라 인식함을 전제로, 사회복지사의 경력몰입에 영향을 미치는 요인을 다차원적 수준에서 실증적으로 분석함으로써 이론적 통계적 정확성에 기반 한 자료를 토대로 경력관리의 방향성에 대한 실천적 함의를 이끌어내고자 하였다. 이에 본 연구는 46개 기관에 787명의 사회복지사를 대상으로 구조화된 설문지를 통해 개인 및 조직특성 자료를 수집하고, 다층분석기법을 활용하여 조직효과를 감안한 영향요인에 대해 분석하였다. 분석결과, 우선 경력몰입의 총 분산 중 기관특성에 의한 설명이 15.8%로 유의미하게 나타났고, 이의 영향요인으로 개인수준에서는 프로티언 경력태도, 성장욕구, 인적 네트워크, 자기효능감이, 조직수준에서는 자격보상제도가 각각 유의미한 변수로 확인되었다. 이에 조직효과를 감안한 개인요인들의 활성화로 성공적 경력몰입을 이끌어내기 위한 방안으로 조직 내 슈퍼비전의 체계화, 근로자지원프로그램의 적용, 전문적 경력개발의 인센티브제공, 학습조직으로의 전환 등 개인-기관 통합적 실천전략을 제안하고 논의하였다.

• Korean Journal of Radiology
• /
• 제22권6호
• /
• pp.983-993
• /
• 2021

Objective: To investigate the image quality of ultralow-dose CT (ULDCT) of the chest reconstructed using a cycle-consistent generative adversarial network (CycleGAN)-based deep learning method in the evaluation of pulmonary tuberculosis. Materials and Methods: Between June 2019 and November 2019, 103 patients (mean age, 40.8 ± 13.6 years; 61 men and 42 women) with pulmonary tuberculosis were prospectively enrolled to undergo standard-dose CT (120 kVp with automated exposure control), followed immediately by ULDCT (80 kVp and 10 mAs). The images of the two successive scans were used to train the CycleGAN framework for image-to-image translation. The denoising efficacy of the CycleGAN algorithm was compared with that of hybrid and model-based iterative reconstruction. Repeated-measures analysis of variance and Wilcoxon signed-rank test were performed to compare the objective measurements and the subjective image quality scores, respectively. Results: With the optimized CycleGAN denoising model, using the ULDCT images as input, the peak signal-to-noise ratio and structural similarity index improved by 2.0 dB and 0.21, respectively. The CycleGAN-generated denoised ULDCT images typically provided satisfactory image quality for optimal visibility of anatomic structures and pathological findings, with a lower level of image noise (mean ± standard deviation [SD], 19.5 ± 3.0 Hounsfield unit [HU]) than that of the hybrid (66.3 ± 10.5 HU, p < 0.001) and a similar noise level to model-based iterative reconstruction (19.6 ± 2.6 HU, p > 0.908). The CycleGAN-generated images showed the highest contrast-to-noise ratios for the pulmonary lesions, followed by the model-based and hybrid iterative reconstruction. The mean effective radiation dose of ULDCT was 0.12 mSv with a mean 93.9% reduction compared to standard-dose CT. Conclusion: The optimized CycleGAN technique may allow the synthesis of diagnostically acceptable images from ULDCT of the chest for the evaluation of pulmonary tuberculosis.

• 한국융합학회논문지
• /
• 제7권4호
• /
• pp.141-154
• /
• 2016

본 연구는 임종간호 태도에 영향을 미치는 요인들을 파악하기 위하여 시도하였다. 연구 대상은 간호대학에 다니고 있는 학생 147명이였으며 측정 도구는 죽음불안, 죽음에 대한 태도, 자아존중감, 삶의 만족도, 임종간호 태도에 관한 문항으로 구성되었다. 죽음불안, 죽음에 대한 태도, 자아존중감, 생활만족도, 임종간호 태도 정도는 기술통계로 분석하였고 제 변수들 간의 상관관계는 Pearson correlation coefficients, 임종간호 태도에 영향을 미치는 요인은 다중 선형 회귀분석(Multiple linear regression)을 적용하였다. 임종간호 태도는 죽음 불안, 죽음에 대한 태도와 유의한 부적 상관성이 있는 것으로 나타났다. 죽음 불안(${\beta}$=-.392), 자아존중감(${\beta}$=.179), 죽음 학습경험(${\beta}$=-.227) 등이 유의미한 영향을 주는 것으로 나타나 임종간호 태도의 18.7%를 설명하였다. 본 연구 결과를 토대로 실제적인 임종간호 교육프로그램 개발에 활용할 수 있을 것이다.

• 대한의용생체공학회:의공학회지
• /
• 제24권2호
• /
• pp.99-106
• /
• 2003

본 논문에서는 정신질환 진단을 위하여 뇌파신호를 판별하는 방법을 제안하였다. 정신질환의 한 종류인 정신분열증 환자의 뇌파와 정상인의 뇌파를 분류하기 위하여 제안한 방법에서는 기본적으로 웨이블릿 변환과 인공 신경망을 이용하였다. 뇌파 신호에 웨이블릿 변환을 적용하여 각각 알파. 베타. 세타 그리고 델타파에 해당하는 주파수 대역의 웨이블릿 계수를 구한 다음. 각각의 주파수 대역에 대한 웨이블릿 계수들의 크기 평균 및 분산들을 인공 신경망의 입력 데이터로 이용하였다. 인공 신경망은 2개의 은닉층을 갖는 4층의 피드포워드 회로망 구조를 가지며 학습에는 역전파 학습 알고리듬을 이용하였다. 정신분열증의 판별시스템은 19 채널의 뇌파신호에 대응하는 19개의 인공신경망으로 구성되었고 정상인과 정신분열증 환자에 대하여 각각 100%와 86.67%의 정확도를 보여주었다.

• 품질경영학회지
• /
• 제35권2호
• /
• pp.37-44
• /
• 2007

Today, the statistical process control (SPC) in manufacture environment is an important role at the process by the productivity improvement of the manufacturing systems. The control chart in this statistical method is widely used as an important statistical tool to find the assignable cause that provoke the change of the process parameters such as the mean of interest or standard deviation. But the traditional SPC don't grasp the change of process according to the points fallen the near control limits because of monitoring the variance of process such as the fixed sampling interval and the sample size and handle the cost of the aspect of these sample point. The control chart can be divided into the statistical and economic design. Generally, the economic design considers the cost that maintains the quality level of process. But it is necessary to consider the cost of the process improvement by the learning effects. This study does the economic design in the VSI $\bar X$ control chart and added the concept of loss function of Taguchi in the cost model. Also, we preyed that the VSI $\bar X$ control chart is better than the FSI $\bar X$ in terms of the economic aspects and proposed the standard of the process improvement using the VSI $\bar X$ control chart.

• 대한의용생체공학회:의공학회지
• /
• 제27권6호
• /
• pp.323-331
• /
• 2006

The purpose of this study was to investigate the effect of performing a cognitive task during treadmill walking on the stride rate variability. Ten university students(age $24.0{\pm}0.25$, height $172{\pm}3.1cm$, weight $66{\pm}5.3kg$) were participated in dual task experiments which consist of both walking alone and walking with a cognitive task. Two-back task was selected for the cognitive task since it did not have learning effect during the experimental procedure.3D motion analysis system was used to measure subject's position data by changing walking speed with 4.8, 5.6, 6.4, 6.8, and 7.2 km/hr. Stride rate was calculated by the time between heel contact and heel contact. Accuracy rate of a cognitive task during walking, coefficient of variance, allometric scaling methods and Fano factor were used to estimated the stride rate variability. As the walking speed increased, accuracy rate decreased and the logarithmic value of Fano factor increased which showed the statistical difference. Thus it can be concluded that the gait control mechanism is distracted by the secondary attention focus which is the cognitive task ie. two-back task. Further study is needed to clarify this by increasing the number of subject and experiment time.

• 디지털융복합연구
• /
• 제12권6호
• /
• pp.415-423
• /
• 2014

본 연구는 간호대학생의 문화적 역량 정도를 확인하고 문화적 역량의 예측요인을 파악하고자 시되되었다. 연구대상자는 K시와 B시에 소재하는 3개 대학교 간호학과 학생 181명이었다. 자료수집을 위한 설문조사는 2013년 6월 5일부터 8월 31일까지 실시되었고, 자료분석은 SPSS/WIN 17.0 프로그램을 이용하여 descriptive statistics, t-test, One way -ANOVA와 multiple regression 분석하였다. 연구결과 문화적 역량은 자기효능감, 공감능력과 유의한 상관관계가 있는 것으로 나타났으며, 간호대학생의 문화적 역량에 영향을 미치는 요인은 자기효능감(${\beta}=.63$, p<.001), 공감능력(${\beta}=.18$, p=.001)과 다문화교육(${\beta}=.13$, p=.019)이 문화적 역량을 51% 설명하였다. 본 연구에 의하면 문화적 역량 영향요인을 고려한 효율적인 교육프로그램 개발이 요구된다.

• Human Ecology Research
• /
• 제53권2호
• /
• pp.119-130
• /
• 2015

In this study, we examined the effects of a mother's reading motivation on the home literacy environment. Seven hundred fifty-seven mothers with three to five year old children participated in this study and completed the Adult Motivation for Reading Scale and the Home Literacy Environment Questionnaire. The subcategories of the Adult Motivation for Reading Scale are "reading as part of self," "reading efficacy," "reading for recognition," and "reading to do well in other realms." The Home Literacy Environment Questionnaire has three subcategories, namely reading books, reading behavior and modeling of parents, and literacy learning. The mean, standard deviation, one-way analysis of variance (ANOVA), and hierarchical multiple regression analysis were used to analyze the data. The results showed that (1) the home literacy environment was significantly different depending on the mother's education and family income levels, (2) the mother's reading motivation also differed significantly depending on the mother's education and family income levels, and (3) the mother's reading motivation has a significant explanatory effect on the home literacy environment. In addition, the mothers falling into the reading motivation subcategories of "reading part of self" or "reading to do well in other realms" were found to enrich their home literacy environment. Therefore, this study demonstrates that the mother's reading motivation is an important factor affecting the home literacy environment.

• 한국간호교육학회지
• /
• 제22권4호
• /
• pp.549-558
• /
• 2016

Purpose: The purpose of this study was to develop and validate a Nursing Competency Scale in Simulation (NCSS) for nursing students. Methods: A preliminary version of the NCSS of 14 items was derived from the literature. A panel of seven experts reviewed the preliminary version for content validation and developed 15 items scale. A convenient sample of 195 nursing students completed the survey and two evaluators measured the performances of nine teams in a simulation scenario with NCSS. The data were analyzed using exploratory factor analysis, descriptive statistics, independent t-test and Cronbach's alpha. Intraclass correlation coefficient (ICC) was used in order to estimate the degree of inter-rater reliability. Results: An exploratory factor analysis demonstrated that two factor structures of the NCSS explained 51.1% of the total variance. Two factors were named psychosocial skills and cognitive and psychomotor skills. The mean scores of NCSS between third and 4th grade were significantly different providing support for its known-group validity. Cronbach's alpha was .90 and ranged from .79 to .88. The overall ICC for inter-rater agreement was 0.89 (95% CI 0.03 to 0.98). Conclusion: This scale shows preliminary evidence for validity and reliability. It could be a useful instrument for measuring learning outcome in simulation for nursing students' clinical competency.

• 의학교육논단
• /
• 제18권3호
• /
• pp.174-179
• /
• 2016

The purpose of this study is to examine the factors that influence school life satisfaction based on personal variables, self-esteem, interpersonal relationships, and perception of the educational environment at a medical school in Korea. The data were collected from 228 medical students who agreed to participate in the study at a medical school. The Dundee Ready Medical Environment Measure (DREEM) and the self-esteem scale by Rosenberg were used. Questions measuring satisfaction of medical school life and interpersonal relationships (with professors, with senior/junior students, and with friends) were asked using a 5 point Likert scale. The data were analyzed by t-test, analysis of variance, and multiple regression analysis. The satisfaction of medical school life of male students was significantly higher than female students and increased with years of schooling. In DREEM, the students' perception of teachers decreased by school years. The relationship with senior and junior students of third year students was higher than other school years. The result of the regression analysis to determine the variables that affect satisfaction of medical school life showed that interpersonal relationships with senior and junior students, the students' social self-perception, and the students' perception of learning were significant. The results of this study will help medical schools in their plans to improve the level of satisfaction for the happiness and successful academic achievements of their students.