• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.808-811
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• 2009

Robovie-R2 [1], developed by ATR, is a 110cm high, 60kg weight, two wheel drive, human like robot. It has two arms with dynamic fingers. It also has a position sensitive detector sensor and two cameras as eyes on his head for recognizing his surrounding environment. Recent years, we have carried out a project to integrate new functions into Robovie-R2 so as to make it possible to be used in a dining room in healthcare center for helping serving meal for elderly. As a new function, we have developed software system for adaptive movement control of Robovie-R2 that is primary important since a robot that cannot autonomously control its movement would be a dangerous object to the people in dining room. We used the cameras on Robovie-R2's head to catch environment images, applied our original algorithm for recognizing obstacles such as furniture or people, so as to control Roboie-R2's movement. In this paper, we will focus our algorithm and its results.

• 한국식생활문화학회지
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• 제37권6호
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• pp.467-476
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• 2022

This article defines the characteristics of Korean vegetarianism by tracing the changes in the core motives revealed in the historical development of the vegetarian movement that started in the West. We further explore and compare the limitations of the vegetarian movement conceived in the West with the essential values, 'How can Korean vegetarian culture gain the upper hand?'. Our results indicate that the sequential changes of the motives inherent to the flow of the modern vegetarian movement were <religious-philosophy>, <political-society>, and <healthy-nutrition>. This settled the transition from 'vegetarianism as an ideological form' to 'vegetarianism as a lifestyle', making it a more becoming way of life. However, along with the spread of 'vegetarian lifestyle as a form of life', commercial vegetarianism, which overshadows the essential value of vegetarianism, continued to flourish due to the modern capitalist industrial system. To curb commercialization, the necessity arose to establish a new vegetarian diet with a propensity towards an 'ecological-environmental point of view'. Thus, in order to establish the term and concept of a vegetarian diet for Korean vegetarian characteristics, we propose the formation of a vegetarian term and concept suitable for the Korean vegetarian culture.

• 대한치과교정학회지
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• 제42권4호
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• pp.207-217
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• 2012

Objective: This study aimed to evaluate the effect of an intentionally created socket on bone remodeling with orthodontic tooth movement in rabbits. Methods: Eighteen male rabbits weighing 3.8 - 4.25 kg were used. An 8-mm deep and 2-mm wide socket was drilled in the bone 1 mm mesial to the right mandibular first premolar. The left first premolar was extracted to serve as an extraction socket. A traction force of 100 cN was applied to the right first premolar and left second premolar. Sections were obtained at the middle third of the moving tooth for both the drilled and extraction sockets and evaluated with hematoxylin and eosin staining and immunohistochemical analyses. The amount of tooth movement and tartrate-resistant acid phosphatase (TRAP)-positive cell count were compared between the 2 groups using the Mann-Whitney U test. Results: At week 2, the distance of tooth movement was significantly higher in the intentional socket group (p < 0.05) than in the extraction socket group. The number of TRAP-positive cells decreased in week 2 but increased in week 3 (p < 0.05). However, there were no significant differences between the groups. Furthermore, results of transforming growth factor (TGF)-${\beta}$ staining revealed no significant differences. Conclusions: The intentional socket group showed greater distance of tooth movement than did the extraction socket group at week 2. Osteoclast counts and results of immunohistochemical analyses suggested elevated bone remodeling in both the groups. Thus, osteotomy may be an effective modality for enhancing tooth movement in orthodontic treatment.

• 한국전문물리치료학회지
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• 제25권1호
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• pp.12-21
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• 2018

Background: Research efforts to improve the pulmonary function of children with cerebral palsy (CP) need to focus on their decreased diaphragmatic ability compared to normal children. Real-time ultrasonography is appropriate for demonstrating diaphragmatic mechanisms. Objects: This study aimed to compare diaphragm movement, pulmonary function, and pulmonary strength between normal children and children with CP by using ultrasonography M-mode. The correlation between general characteristics, diaphragm movement, pulmonary function, and pulmonary strength was also studied. Methods: The subjects of this study were 25 normal and 25 CP children between five and 14 years of age. Diaphragm movement was measured using real-time ultrasonography during quiet and deep breathing. Pulmonary function (such as forced expiratory volume in one second; FEV1 and peak expiratory flow; PEF) and pulmonary strength (such as maximum inspiratory pressure; MIP and maximum expiratory pressure; MEP) were measured. A paired t-test and Spearman's Rho test, with a significance level of .05, were used for statistical analysis. Results: The between-group comparison revealed that normal children had significantly greater diaphragm movement, FEV1, PEF, MIP, and MEP (p<.05) than CP children. The results showed that general characteristics were significantly related to FEV1, PEF, MIP, and MEP (p<.05). Conclusion: In clinical settings, clinicians need to concern decreased diaphragm movement, pulmonary function, and pulmonary strength in CP group compared to normal children.

• 한국실내디자인학회논문집
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• 제13권5호
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• pp.106-113
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• 2004

The purpose of this study is to present the dwelling space by attaching or inserting the mobile space unit to the fixed building by providing the temporary dwelling space for those suffering from flood disaster, natural disaster or solitary old people or the space and program that the completed building in the city can not provide such as temporary events in the bridge, passage space, walking space for the handicapped, stores located between street blocks, and plaza. Therefore, this study was intended to investigate temporary dwelling space through the composition of space and the experiment of the applicability of the program through the methods of movement, folding, module, expansion and evolution of mobile space. An attempt was made to apply the concept of ‘mobile space’ to the dwelling space not only with a focus on the freedom of variable and changeable physical movement but also with a focus on the existence of the nomad and the way of thinking that bleaks away from a given value system and code, creates a new value and continues to move to a new domain. This study attempted to analyze how the concept of ‘mobile space’ has been developed in what form and method they have been applied and interpreted in the historical background. It attempted to resolve the concepts of movement and mobility through the experiment so that they might apply to the space of contemporary city. This study attempted to experiment this possibility using the mobile space unit and apply it.

• 성인간호학회지
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• 제26권3호
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• pp.352-361
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• 2014

Purpose: The purpose of this study was to explore the communication experience of intensive care unit (ICU) nurses in the workplace. Methods: The present study utilized a qualitative approach using focus group interview method. A total of three focus groups of 15 ICU nurses from two university hospitals were formed. The conversations during the focus group interviews were recorded and analyzed through Colaizzi's phenomenological method. Results: As a result of analyzing participants' conversation, Five theme clusters were elicited, namely, "one-way communication", "differences in the position of senior and junior nurses", "communication crisis", "beginning of understanding", and "movement toward change" out of 15 themes and 138 significant sentences. Conclusion: ICU nurses report having experienced communication crisis because of the one-way communication of the ICU nursing environment and the hierarchical differences in junior and senior nurses' position. Systematic education and continuous training on communication skills need to be provided to improve interpersonal relationship among nurses and work environment in the ICUs.

• 한국전자거래학회지
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• 제18권3호
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• pp.211-222
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• 2013

지리적으로 인접되어 있으면서 이동관점에서 같은 역할을 수행하는 Zone의 파악은 사람들의 이동흐름을 이해하고 도시개발 및 이동편의성 개선 등을 위한 중요한 정보로 활용된다. 그러나 기존의 연구는 특정 지점간의 이동과 Zone 발견을 개별적으로 수행하여, 거시적 관점에서의 이동패턴을 이해하는 데에는 한계가 존재한다. 따라서 본 연구에서는 스마트카드 전자거래 빅데이터로부터 Zone들을 발견하고 동시에 Zone들 간의 관계를 설명하는 클러스터링 기반의 이동패턴 분석기법을 제안한다. 또한, 설명력과 종속성 관점에서 이동패턴을 정량적으로 평가하는 지표를 제안한다. 제안된 분석기법을 이용하여 서울시 지하철에서 수집된 실 데이터를 분석하여 서울시에서의 이동패턴을 밝혀내고 시각화하였다.

• 한국융합학회논문지
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• 제11권2호
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• pp.215-223
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• 2020

패전 이후 1950년대를 전후하여 일본에서는 서클문학운동이 전국에서 일어났고, 재일조선인 민족운동의 주체도 자신들의 정치적 권리와 주장을 문학운동과 연동하여 서클과 기관지를 통하여 생산·확장시켜왔다. 그러나 지금까지 재일조선인 민족운동의 정치적 주체와 문학서클 운동과의 교류, 갈등을 구체적인 사례로 분석 연구한 사례는 아직 미미한 실정이다. 따라서 본고에서는 조련과 민전의 정치적 역학관계로 탄생한 '오사카 시인집단' 기관지『진달래』와 노선전환에 따른 조총련의 '재일조선 문학회' 기관지『조선 문예』의 성립과정과 두 잡지의 교류, 갈등, 해산 과정 등을 비교분석하여 그 실체를 규명했다. 즉, 해방 후 재일조선인 문학자들이 갖고 있었던 탈식민지화로의 끝없는 고민과 대립, 모순과 갈등의 실체를 '공화국공민과 재일', '주제와 창작언어'등으로 분석하여 '조총련과의 갈등'으로 결국 해산에 이르는 과정을 분석하였다. 본고에서 파악된 1950년대 재일조선인들의 시대정신은 향후 재일조선인문학의 출발점 연구에 새로운 방향을 제시해줄 수 있으리라 기대된다.

• Biomaterials and Biomechanics in Bioengineering
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• 제3권2호
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• pp.115-127
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• 2016

Shoulder pain, injury and discomfort are public health and economic issues world-wide. The function of these joints and the stresses developed during their movement is a major concern to the orthopedic surgeon to study precisely the injury mechanisms and thereby analyze the post-operative progress of the injury. Shoulder is one of the most critical joints in the human anatomy with maximum degrees of freedom. It mainly consists of the clavicle, scapula and humerus; the articulations linking them; and the muscles that move them. In order to understand the behavior of individual muscle during abduction arm movement, an attempt has been made to analyze the stresses developed in the shoulder muscles during abduction arm movement during the full range of motion by using the 3D FEM model. 3D scanning (ATOS III scanner) is used for the 3D shoulder joint cad model generation in CATIA V5. Muscles are added and then exported to the ANSYS APDL solver for stress analysis. Sensitivity Analysis is done for stress and strain behavior amongst different shoulder muscles; deltoid, supraspinatus, teres minor, infraspinatus, and subscapularies during adduction arm movement. During the individual deltoid muscle analysis, the von Mises stresses induced in deltoid muscle was maximum (4.2175 MPa) and in group muscle analysis it was (2.4127MPa) compared to other individual four rotor cuff muscles. The study confirmed that deltoid muscle is more sensitive muscle for the abduction arm movement during individual and group muscle analysis. The present work provides in depth information to the researchers and orthopedicians for the better understanding about the shoulder mechanism and the most stressed muscle during the abduction arm movement at different ROM. So during rehabilitation, the orthopedicians should focus on strengthening the deltoid muscles at earliest.

• 항공우주시스템공학회지
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• 제12권3호
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• pp.9-17
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• 2018

지구 관측용 소형 위성카메라의 경우, 중대형 위성에 비해 상대적으로 약한 구조 안정성으로 인해 열악한 발사환경 및 우주환경에서 광부품의 정렬오차가 발생하기 쉽다. 발생한 정렬오차는 위성카메라의 광학 성능 저하를 유발시킨다. 본 연구에서는 소형 위성 카메라의 정렬오차를 보상하기 위하여 3축 포커스 메커니즘을 제안하였다. 이 메커니즘은 3개의 압전 작동기로 구성되어 x-축, y-축 틸트 및 디스페이스(De-space) 보정을 수행할 수 있다. 포커스 메커니즘의 설계 요구조건은 슈미트-카세그레인(Schmidt-Cassegrain) 타입의 목표 광학계 설계에서 도출되었다. 부경 정렬오차 보상을 위하여 부 반사경의 뒤에 포커스 메커니즘을 부착하여 부경의 3축 운동을 제어하였다. 이 때 파면오차로 인한 광학 성능 저하를 최소화하기 위한 플렉셔를 Box-Behnken 실험계획법을 통하여 설계하였으며, ANSYS를 이용하여 파면오차 해석을 수행하였다. 제작된 포커스 메커니즘은 작동기의 수학적 모델링, PID 제어기 설계, 서보 제어실험을 통해 서보성능을 검증하였다.