• 대한간호학회지
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• 제17권1호
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• pp.33-43
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• 1987

This study was to explore the level of self-actualization of the students in Korea Air and Correspondence University. The study subjects consisted of 507 students who visited the counseling center for taking advices to several psychosocial problems due to distance education through nursing counseling. The self actualization of the subjects evaluated by the self-actualization Inventory standardized by Kim and Lee in Korea. It consisted of 130 two-choice comparative value and behavior judgements. The items also consisted of two basic scales: one is inner directed scale (107 items) and the other is time competence (23 items) which included eight subscales, each of which measures a conceptually important element of self-actualization. Analysis of finding was as follows: 1) The self-actualization mean score of the total subjects was characterized by normal value within normal range of scale. The highest subscale score was NC scale: the lowest scale was EX scale. 2) The mean score of time competence scale of female student was higher than male student's time competence scale. 3) There was no significant differences in self aclualization among 4 groups in age. 4) There was also no significant differences in self-actualization between the group taken one time nursing counseling and the group taken two more times nursing counseling. 5) The problems of Job, learning, personality and further study, significantly had effects on the score of self-actualization level.

• 한국초전도ㆍ저온공학회논문지
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• 제19권2호
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• pp.29-32
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• 2017

The use of electronic devices such as mobile phones and tablet PCs has increased of late. However, the power which is supplied through wires has a limitation of the free use of devices and portability. Magnetic-resonance wireless power transfer (WPT) can achieve increased transfer distance and efficiency compared to the existing electromagnetic inductive coupling. A superconducting coil can be applied to increase the efficiency and distance of magnetic-resonance WPT. As superconducting coils have lower resistance than copper coils, they can increase the quality factor (Q-factor) and can overcome the limitations of magnetic-resonance WPT. In this study, copper coils were made from ordinary copper under the same condition as the superconducting coils for a comparison experiment. Superconducting coils use liquid nitrogen to keep the critical temperature. As there is a difference of medium between liquid nitrogen and air, liquid nitrogen was also used in the normal conductor coil to compare the experiment with under the same condition. It was confirmed that superconducting coils have a lower reflection-coefficient($S_{11}$) than the normal conductor coils.

• 제어로봇시스템학회논문지
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• 제21권10호
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• pp.958-964
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• 2015

In this paper, an object recognition method based on the depth information from the RGB-D camera, Xtion, is proposed for an indoor mobile robot. First, the RANdom SAmple Consensus (RANSAC) algorithm is applied to the point cloud obtained from the RGB-D camera to detect and remove the floor points. Next, the removed point cloud is classified by the k-means clustering method as each object's point cloud, and the normal vector of each point is obtained by using the k-d tree search. The obtained normal vectors are classified by the trained multi-layer perceptron as 18 classes and used as features for object recognition. To distinguish an object from another object, the similarity between them is measured by using Levenshtein distance. To verify the effectiveness and feasibility of the proposed object recognition method, the experiments are carried out with several similar boxes.

• Journal of Advanced Marine Engineering and Technology
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• 제21권4호
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• pp.381-386
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• 1997

The offsetting method using geometric properties of B-spline control polygon is more faster than using of general normal vector in offset processing. But this method itself does not solve the prob¬lems of loop removal in normal offsetting. Generally the distance between neighborhood spans of B-spline control polygon is greater than the offset distance, the loops are occurred in offsetting. For generating of the more precision tool-path in NC machining, the loops of offset must be removed. In this paper, two methods for loop removal are introduced in offsetting of B-spline curve. One is using the intersection of B-spline control span which being occurred of the loop. The other is using two B-spline curve divisions divided from original B-spline curve or its offset curve. After the inter¬section point of loop was searched, the loop being removed to cusp. Also the method for filleting of cusp is inspected to more precision cutting. It is shown that the offsetting using B-spline control polygon is more effective in the sculptured surface machining.

• 한국농공학회논문집
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• 제60권4호
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• pp.83-91
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• 2018

Land reclamation, coastal construction, coastline extension and port construction, all of which involve dredging, are increasingly required to meet the growing economic and societal demands in the coastal zone. During the land reclamation, a portion of landfills are lost from the desired location due to a variety of causes, and therefore prediction of sediment transport is very important for economical and efficient land reclamation management. In this study, laboratory disposal tests were performed using an open channel, and suspended sediment transport was analyzed according to flow velocity and grain size. The relationships between the average and standard deviation of the deposition distance and the flow velocity were almost linear, and the relationships between the average and standard deviation of deposition distance and the grain size were found to have high non-linearity in the form of power law. The deposition distribution of sediments was demonstrated to have log-normal distributions regardless of the flow velocity. Based on the experimental results, modeling of suspended sediment transport was performed using deep neural network, one of deep learning techniques, and the deposition distribution was reproduced through log-normal distribution.

• 전기학회논문지
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• 제66권7호
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• pp.1072-1077
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• 2017

Mean-reverting analysis refers to a way of estimating the underlining tendency after new data has evoked the variation in the equilibrium state. In this paper, we propose a new method to interpret the specular portraits of Premature Ventricular Contraction(PVC) arrhythmia by applying K-means unsupervised learning algorithm on electrocardiogram(ECG) data. Aiming at this purpose, we applied a mean-reverting model to analyse Heart Rate Variability(HRV) in terms of the modified poincare plot by considering PVC rhythm as the component of disrupting the homeostasis state. Based on our experimental tests on MIT-BIH ECG database, we can find the fact that the specular patterns portraited by K-means clustering on mean-reverting HRV data can be more clearly visible and the Euclidean metric can be used to identify the discrepancy between the normal sinus rhythm and PVC beats by the relative distance among cluster-centroids.

• Physical Therapy Rehabilitation Science
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• 제12권2호
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• pp.161-166
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• 2023

Objective: The purpose of the study was to investigate the effect of shoe sole deformation on the muscle activity and balance of the lower extremities when standing on one foot. Design: Crossed-control group study Methods: A total of 18 healthy adults participated in this study. 9 participants with normal shoe and 9 participants with deformed in shoe out-soles (wear shoes) were included. Muscle activity of the tibialis anterior, fibularis longus and gluteus medius during one leg standing was measured using a electromyography. A balance board was used to evaluate balance ability when standing on one leg. The balance ability when standing on one leg was measured by the sway speed and distance of the center of gravity. Results: Muscle activity of the tibialis anterior, fibularis longus and gluteus medius was no significant difference between groups (P > 0.05). Balance ability when standing on one leg was significantly different from the group wearing normal shoes in all variables related to the sway distance and sway speed of the center of gravity. Conclusions: Through this study, the wear of the outer sole of the shoe indirectly confirmed the effect on the wearer's lower extremity muscle activity and balance ability when standing on one foot. These results of this study are expected to be used as basic data for future studies on shoe wear, lower extremity muscle activity and balance ability.

• 한국ITS학회 논문지
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• 제22권2호
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• pp.64-79
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• 2023

본 연구는 Monte Carlo 기법을 교통카드기반의 수도권 지하철의 통행배정 문제에 적용하는 과정을 검토하였다. 연구는 우선 교통카드에서 역 간 표본의 통행에서 나타나는 통행시간에 대하여 프로빗 모형의 기반이 되는 정규분포의 가정을 적용하였다. Monte Carlo 통행배정은 역 간 통행에 대하여 평균과 표준편차를 산정하고 이를 개별 링크의 차내시간과 환승의 보행 및 배차간격의 가중치로 적용하는 방안을 제안하였다. 샘플 수가 50 이하로 낮게 나타나는 장거리 통행은 유사 통행의 특성을 이전하는 방안으로 적용하였다. 수도권 지하철 네트워크에 대하여 두 가지 방향에서 연구 결과를 검토하였다. 하나는 선릉-성수의 단일 역 간 통행에 대하여 차내시간 및 환승시간에 랜덤샘플링을 적용하는 방안으로 검증하였다. 다음으로 수도권 지하철 전체에 대해서는 역 간 통행 샘플수에 따라서 50 이상은 역 간 정규분포의 가정을 그대로 수용하였다. 샘플수가 50 이하의 장거리 통행은 역 간 최소거리가 122 (Km)에서 표본의 균등성이 확보되는 상황으로 판단하고 이 거리에서 나타나는 카드자료의 역 간 평균과 표준편차를 적용하였다. 사례연구로서 교통카드자료로 구축된 수도권 지하철을 네트워크를 대상으로 단일OD 및 전체 OD의 통행배정의 결과를 도출하였다. 한편 통행에 대한 샘플링이 부족한 상황에서 추가적인 연구가 필요한 것으로 나타났다.

• Journal of Korea Trade
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• 제25권2호
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• pp.46-57
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• 2021

Purpose - In terms of human resource management, many Korean enterprises in China have experienced problems such as frequent resignations of Chinese employees and labor disputes. This can be mainly attributed to the fact that Chinese employees are not consistent with Korean vertical management methods, which is closely related to the national culture theory proposed by Hofstede, specifically the dimension of power distance and long- versus short-term orientation (LTO). Therefore, this research aims to investigate cultural differences between Korea and China from these two dimensions, and the impact on the human resource management of Korean-invested enterprises in China. Design/methodology - This research first utilizes the latest data (Wave 7) of the World Values Survey (WVS) to verify the difference in power distance and long- versus short-term orientation between Korean and Chinese cultures using responses from Korea and China, and then uses case analysis to analyze the impact of this cultural difference on the human resource management of Korean enterprises in China. Findings - Our main findings can be summarized as follows. Korea and China have significant differences in power distance and long- versus short-term orientation. In terms of power distance, Korean respondents show higher power distance compared to Chinese respondents. In the dimension of long- versus short-term orientation, it was found that Chinese respondents showed a shorter-term orientation, whereas Korean respondents showed a longer-term orientation. Originality/value - Previous studies put focus on the power distance and individualism-collectivism dimensions to explain cultural differences between Korea and China, and generated contradictory results. This research further confirms the cultural differences between Korea and China from the dimensions of power distance and long-versus short-term orientation using secondary data. The comparative studies from this perspective have long been underexplored and lack empirical confirmation.

• 한국과학교육학회지
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• 제41권5호
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• pp.415-428
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• 2021

COVID-19로 인하여 도입된 원격 과학 수업은 이제 교사들에게 새로운 일상으로 받아들여진다. 이러한 상황에서 교사가 지난해의 실행을 습관적으로 되풀이하기보다는 변화하는 맥락을 적극적으로 해석하고, 맥락에 적절한 학습 환경을 조성하는 것이 요구된다. 본 연구에서는 COVID-19로 인하여 시행된 원격 수업 2년 차 상황에서 교사가 문제를 인식하고, 이를 해결하는 실행에서 드러나는 교사 행위주체성과 이때의 맥락을 분석하였다. 특히, 2020년 4월에서부터 2021년 7월까지 16개월 동안 교사의 원격 과학 수업 실행을 추적하여 맥락에 따라 변화하는 교사의 행위주체성을 탐색하였다. 이를 위하여 중등학교 과학교사 3인을 대상으로 질적 사례 연구를 진행하였다. 연구 참여자와의 인터뷰, 연구 참여자가 사용한 교육자료를 수집하고, 이를 지속해서 검토하며 분석하였다. 연구 결과, 교사는 스스로 자신의 수업을 비판적으로 성찰함으로써 자신의 원격 과학 수업 실행에서의 문제를 인식하고 이를 해결하기 위한 행위주체성을 발현하거나 외부로부터의 변화에 능동적으로 적응하기 위하여 행위주체성을 발현하거나 자신이 추구하는 과학 교육을 원격 수업 상황에서도 구현하기 위하여 행위주체성을 발현하였다. 그리고 이 과정에서 지난해 원격 과학 수업을 실행한 경험 및 이로부터 축적된 실천적 지식, 자신의 실행에 대한 성찰, 원격 과학 수업에 대한 장·단기적 목표가 영향을 미쳤다. 또한, 교사가 속한 맥락에서 원격 수업의 질 제고를 추구하는 학교 공동체의 분위기나 교사 사이의 활발한 소통과 협력 역시 교사 행위주체성 발현을 촉진하였다. 본 연구는 우리나라 원격 과학 수업 상황에서 어떠한 과학교사 행위주체성이 발현되었는지 탐색하였으며, 이 과정에서 영향을 미친 맥락을 분석하였다. 또한, 같은 교사가 상황이 변화함에 따라 행위 주체성 발현에 어떠한 변화가 나타나는지, 그리고 그 과정에 영향을 미치는 맥락을 이해하기 위하여 교사의 개인적인 요인 및 맥락적 요인을 분석하였다. 이를 통하여 교사 행위주체성 발현을 지원할 수 있는 전략을 마련하는 데 시사점을 제시하고자 한다.