• Journal of Positioning, Navigation, and Timing
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• 제9권2호
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• pp.131-138
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• 2020

In this paper, we analyze the delay phenomenon that can occur when controlling an unmanned aerial vehicle using a camera and describe a solution to solve the phenomenon. The group of pictures (GOP) value is changed in order to reduce the delay according to the frame data size that can occur in the moving image data transmission. The appropriate GOP values were determined through experimental data accumulation and validated through camera self-test, system integration laboratory (SIL) verification test and system integration test.

• International Journal of Naval Architecture and Ocean Engineering
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• 제6권2호
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• pp.333-346
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• 2014

If we want to analyze the motion of a body in fluid, we should use rigid-body dynamics and fluid dynamics together. Even if the rigid-body and fluid dynamics are each self-consistent, there arises the problem of self-similar structure in the equation of motion when the two dynamics are coupled with each other. When the added mass is greater than the mass of a body, the calculated motion is divergent because of its self-similar structure. This study showed that the above problem is an inherent problem. This problem of self-similar structure may arise in the equation of motion in which the fluid dynamic forces are treated as external forces on the right hand side of the equation. A reconfiguration technique for the equation of motion using pseudo-added-mass was proposed to resolve the self-similar structure problem; specifically for the case when the fluid force is expressed by integration of the fluid pressure.

• 가정과삶의질연구
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• 제28권1호
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• pp.145-157
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• 2010

This is a study that explores the influence of self-differentiation and acculturation among married immigrant women on their feelings of marriage satisfaction by residential area. The aim was to verify the level of self-differentiation and acculturation that married immigrant women secure from multicultural marriage. To achieve this objective, the study widely distributed a questionnaire that targeted women who were participating in education and other services at health and family support centers, multi-cultural family support centers, general social welfare centers, immigrant women shelters, and Korean language classrooms which are located in Seoul, Gyeonggi, Chungcheong, Jeolla, and Gyeongsang. Data analysis involved frequency analysis, descriptive statistics, one-way-Anova, and multiple regression analysis. Based on the results of descriptive statistics, two factors, namely, (1)interpersonal-relation differentiation, a sub-scale of self-differentiation, and (2)marginalization, a sub-scale of acculturation, had the lowest average. In verifying its various hypotheses, the study achieved the following results. Firstly, among demographic characteristics, there was difference of the mean in the marriage period, average monthly income, the frequency of meetings with the married woman´s parents-in-law and her own parents, and the average cost of supporting the woman's parents-in-law and her own parents. Secondly, among demographic characteristics, the variable of influencing marriage satisfaction showed negative influence in the case of women dwelling in farming and fishing villages. This shows that women residing in cities whether small, medium or large have higher marriage satisfaction. Also, as a result of verifying whether self-differentiation has influence on marriage satisfaction, the element of interpersonal-relations differentiation had a negative influence on marriage satisfaction. Thirdly, as for influence of acculturation upon marriage satisfaction, the study showed that just integration, which is a sub-scale of acculturation had positive effect on marriage satisfaction. In other words, the study showed that the interpersonal-relation differentiation among the sub-scales of self-differentiation among married immigrant women had a negative influence, and that integration among the sub-scales in acculturation had a positive influence on marriage satisfaction. Based on these results, in order to increase interpersonal-relation differentiation, as well as marriage satisfaction among immigrant women, the study suggests the integration of the women's families with the nuclear and extended families in the communities where the women reside.

• 의학교육논단
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• 제19권2호
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• pp.101-108
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• 2017

When participating in problem-based learning (PBL), it is important for medical students to generate claims and provide justifications for their claims in small group discussions. This study aimed to investigate the effect of argumentation instruction on medical student learning experiences with PBL. A total of one hundred first-year preclinical students from Inje University College of Medicine, who had attended argumentation instruction, participated in this study. All of the participants completed a 5-point Likert scale questionnaire regarding their learning experiences with PBL, before and after the argumentation instruction. The questionnaire comprised 22 items with eight subcategories: argumentation activity, reflection, integration of basic and clinical science, identification of lack of knowledge, logical thinking, self-directed study, communication, and attitude toward discussion. The collected data were analyzed through a paired-sample t-test. The results of this study found that the argumentation instruction promoted the preclinical students' experiences with argumentation activities, reflection, an integration of basic and clinical science, the identification of their lack of knowledge, logical thinking, and self-directed study, and it increased positive attitudes toward group discussion. The findings suggest argumentation instruction can enhance medical student group discussions and help students achieve the objectives of PBL, including acquisition of basic and clinical science knowledge and development of clinical reasoning and self-directed learning abilities, which can highlight the meaningful learning experiences students have with PBL.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집B
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• pp.48-52
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• 2001

In this paper presents an accurate AFM used that is free from the Z-directional distortion of a servo actuator is described. Two mathematical correction methods by the in-situ self-calibrationare employed in this AFM. One is the method by the integration, and the other is the method by inverse function of the calibration curve. The in situ self-calibration method by the integration, the derivative of the calibration curve function of the PZT actuator is calculated from the profile measurement data sets which are obtained by repeating measurements after a small Z-directional shift. Input displacement at each sampling point is approximately estimated first by using a straight calibration line. The derivative is integrated with reference to the approximate input to obtain the approximate calibration curve. Then the approximation of the input value of each sampling point is improved using the obtained calibration curve. Next the integral of the derivative is improved using the newly estimated input values. As a result of repeating these improving process, the calibration curve converges to the correct one, and the distortion of the AFM image can be corrected. In the in situ self-calibration through evaluating the inverse function of the calibration curve, the profile measurement data sets were used during the data processing technique. Principles and experimental results of the two methods are presented.

• 지역사회간호학회지
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• 제32권3호
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• pp.344-355
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• 2021

Purpose: With low birth rates and aging population problems in Korea, the number of foreign workers grows rapidly. The purpose of this study was to identify factors influencing physical activity of foreign workers based on a Health Promotion Model by examining relationships between acculturation, perceived benefits, perceived barriers, exercise self-efficacy, activity-related affect, social support, and physical activity. Methods: The participants were foreign workers aged 18 to 60 who were employed at eight shipyards. A questionnaire was distributed to 216 participants. Results: As a result of the multivariate ordinal logistic regression analysis, factors affecting physical activity of foreign workers were perceived benefits (B=.65, 95% CI=0.08~1.22), exercise self-efficacy (B=.16, 95% CI=0.05~0.26), integration (B=.41 95% CI=0.14~0.69), and social support for physical activity (B=.48, 95% CI=0.12~0.83). The total explanatory power was 17.7% (x²=41.95, p<.001). Conclusion: Based on these results, there is a need to develop a customized program to increase physical activities of foreign workers by enhancing integration, perceived benefits, exercise self-efficacy and social support.

• 한국컴퓨터정보학회논문지
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• 제25권7호
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• pp.213-224
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• 2020

본 연구에서는 김성원과 이영준(2019)의 프로그래밍 기반 TPACK 교육 프로그램이 예비 교사의 수업 전문성에 미치는 효과를 분석하였다. 연구 대상은 40명의 예비 교사이며, 두 집단으로 나누어 처치를 진행하였다. 실험 집단(n=20)에게는 프로그래밍 기반 TPACK 교육 프로그램을 처치하고, 통제 집단(n=20)에게는 ICT 도구 기반 TPACK 교육 프로그램을 적용하였다. 예비 교사의 수업 전문성 변화를 분석하기 위하여 수업 전문성, 교수 효능감, 테크놀로지 통합 자아효능감을 측정하는 검사 도구를 사용하였다. 연구 결과, 통제 집단과 달리 실험 집단은 수업 전문성과 교수 효능감, 테크놀로지 통합 자아효능감이 유의하게 향상되었다. 사전 검사에서는 실험 집단과 통제 집단이 유의한 차이가 존재하지 않았지만, 사후 검사에서는 실험 집단이 통제 집단보다 수업 전문성이 유의하게 높았다. 이러한 결과를 통하여 프로그래밍을 활용한 TPACK 교육이 예비 교사의 수업 전문성 발달에 효과적인 것을 확인할 수 있었다.

• 한국콘텐츠학회논문지
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• 제18권2호
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• pp.301-319
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• 2018

본 연구의 목적은 수퍼바이저의 사회적 지지가 초심상담자의 심리적 소진에 영향을 미치는지 알아보고 역전이 관리 능력 및 각각의 하위요인들(자기통찰, 자기통합, 공감능력, 불안관리, 개념화 기술)이 매개 역할을 하는지 살펴보는 것이다. 이를 위해 상담경력 3년 이하의 슈퍼비전 경험이 있는 초심상담자 202명을 연구대상으로 하였으며 그 결과를 요약하면 다음과 같다. 첫째, 수퍼바이저의 사회적 지지는 역전이 관리 능력 및 5개의 하위요인 모두와 정적 상관을 나타냈고, 수퍼바이저의 사회적 지지, 역전이 관리능력, 5개 하위요인 모두는 심리석 소진과 부적 상관을 나타냈다. 둘째, 수퍼바이저의 사회석 지지가 심리적 소진에 미치는 영향에서 역전이 관리능력의 매개효과를 검증한 결과, 역전이 관리능력이 완전매개하는 것으로 나타났다. 셋째, 수퍼바이저의 사회적 지지가 심리석 소진에 미치는 영향에서 역전이 관리능력의 하위요인들에 대한 매개효과를 검증한 결과, 자기통합, 공감능력, 불안관리는 완전매개하는 것으로 나타났으며, 자기통찰, 개념화 기술은 부분매개하는 것으로 나타났다. 이러한 결과를 통해 역전이 관리능력이 수퍼바이저의 사회석 지지와 심리적 소진 사이에서 강한 영향을 미치고 있음을 확인하였다. 끝으로 본 연구의 시사점과 후속 연구를 위한 제언을 제시하였다.

• 마이크로전자및패키징학회지
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• 제17권4호
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• pp.1-9
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• 2010

삼차원 집적화기술의 현황과 과제 및 향후에 요구되어질 새로운 삼차원 집적화기술의 필요성에 대해 논의를 하였다. Super-chip 기술이라 불리우는 자기조직화 웨이퍼집적화 기술 및 삼차원 헤테로집적화 기술에 대해 소개를 하였다. 액체의 표면장력을 이용하여지지 기반위에 다수의 KGD를 일괄 실장하는 새로운 집적화 기술을 적용하여, KGD만으로 구성된 자기조직화 웨이퍼를 다층으로 적층함으로써 크기가 다른 칩들을 적층하는 것에 성공을 하였다. 또한 삼차원 헤테로집적화 기술을 이용하여 CMOS LSI, MEMS 센서들의 전기소자들과 PD, VC-SEL등의 광학소자 및 micro-fluidic 등의 이종소자들을 삼차원으로 집적하여 시스템화하는데 성공하였다. 이러한 기술은 향후 TSV의 실용화 및 궁극의 3-D IC인 super-chip을 구현하는데 필요한 핵심기술이다.

• 한국콘텐츠학회논문지
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• 제18권5호
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• pp.592-599
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• 2018

본 연구 목적은 노인의 평생교육활동참여가 자아통합감이 미치는 영향에 관해 살펴보고 삶의 만족도와 자원봉사활동이 매개하여 자아통합감에 미치는 영향을 검증하는데 있다. 조사대상자는 서울시, 경기도, 인천시 지역에 거주하는 60세 이상 일반노인대상으로 노인복지회관, 노인대학, 경로당 등의 평생교육기관에 참여하는 300명을 최종 분석 자료로 활용하였다. 분석방법으로는 AMOS 22.0의 구조방정식 모형을 응용하였고, 매개경로의 유의수준을 검증하기 위해서 구조방정식으로 Bootstrap 분석과 추가적으로 Sobel test 검증 방식을 사용하였다. 통계처리는 SPSS WIN 22.0, Amos 22.0 프로그램을 사용하여 분석하였다. 연구 결과 노인의 평생교육활동 참여가 자아통합감에 영향을 주었으며, 삶의 만족도와 자원봉사활동은 매개효과를 가지고 있는 것으로 나타났다. 이를 토대로 평생교육활동 참여를 높일 수 있는 실천적인 방안을 논의하였다.