• 수산해양기술연구
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• 제46권3호
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• pp.232-238
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• 2010

The moving ranges and behavior of four wild abalones, Haliotis discus hannai, were measured by an acoustic telemetry technique. The shape of the sea bottom of the experimental area was surveyed by a bathymetry system and three self-recording type acoustic receivers were used for monitoring the behavior and measuring the movement range. The abalones (WA1-WA4) attached acoustic tags were released and measured the movement during ten months. Three abalones (WA1, WA3 and WA4) were successively detected around the released point during the experiment and were moved to the V2 area where water depth is deeper than the V1 area. The change of inhabitation depth was also detected from the depth sensor of WA4. As the result, abalones were moved to deeper water area accordance with the decrease of the water temperature. The moved ranges of abalones were approximately 200 - 400m from the release point.

• 정보과학회 논문지
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• 제42권12호
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• pp.1544-1550
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• 2015

최근 웨어러블 로봇에 활용이 가능한 실용적인 웨어러블 로봇 인터페이스 개발이 활발하게 이루어지고 있다. 본 논문은 인간의 생체신호 중 근전도를 활용하여, 회귀 기법 기반 연속적인 손목 움직임 의도 추정 방법을 제안한다. 실생활에서 사용자의 상지 자세 변화는 근전도 신호를 변조시켜 성능 저하의 주요한 원인이 되는데, 이를 해결하기 위해 서로 다른 상지 자세에서 학습된 회귀 기법 기반 움직임 추정모델을 통합함으로써 상지 자세 변화에도 강인한 연속적인 손목 움직임 의도 추정 방법을 제안한다. 실험결과에서 서로 다른 상지 자세에서 손목 움직임 의도를 추정하였을 때 제안 방법의 성능이 기존 방법보다 우수함을 확인하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 Asia Navigation Conference
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• pp.3-10
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• 2006

Recently it is coming to be hish reality on visual system in ship-handling simulator depending on the technical development of 3D computer graphics. Even with high reality, it is possible that visual information presented seafarers through screen or display is not equivalent to the real world. In docking maneuvering, visual targets or obstructs are sighted close to ship's operator or within few hundred meters, so it might be possible to affect visual information such as the difference between both eyes' and single eye's visual sight. Because it is not possible to perceive of very slow ship's movement by visual in case of very large vessels, so the Doppler Docking SONAR and/or Docking Speed and Distance Measurement Equipment were developed and applied for safety docking maneuvering. By the way, the simulator training includes the ship's maneuvering training in docking, but in Ship-handling Simulator and also onboard, there are some limitations of perception of ship's movement with visual information. In this paper, perception of ship's movement with visual system in Ship-handling Simulator and competition of performances of visual systems that are conventional screen type with Fixed Eye-point system and Mission Simulator. We got some conclusions not only on the effectiveness for visual system but also on the human behavior in docking maneuver.

• 한국멀티미디어학회논문지
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• 제25권10호
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• pp.1535-1545
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• 2022

Sign language has completely different meaning depending on the direction of the hand or the change of facial expression even with the same gesture. In this respect, it is crucial to capture the spatial-temporal structure information of each movement. However, sign language translation studies based on Sign2Gloss2Text only convey comprehensive spatial-temporal information about the entire sign language movement. Consequently, detailed information (facial expression, gestures, and etc.) of each movement that is important for sign language translation is not emphasized. Accordingly, in this paper, we propose Spatial-temporal Keypoints Centered Sign2Gloss2Text Translation, named STKC-Sign2 Gloss2Text, to supplement the sequential and semantic information of keypoints which are the core of recognizing and translating sign language. STKC-Sign2Gloss2Text consists of two steps, Spatial Keypoints Embedding, which extracts 121 major keypoints from each image, and Temporal Keypoints Embedding, which emphasizes sequential information using Bi-GRU for extracted keypoints of sign language. The proposed model outperformed all Bilingual Evaluation Understudy(BLEU) scores in Development(DEV) and Testing(TEST) than Sign2Gloss2Text as the baseline, and in particular, it proved the effectiveness of the proposed methodology by achieving 23.19, an improvement of 1.87 based on TEST BLEU-4.

• 드라이브 ㆍ 컨트롤
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• 제19권3호
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• pp.23-31
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• 2022

Traffic safety issues have recently been seriously magnified, due to child deaths in apartment complexes and parking lots. Accordingly, traffic safety technologies are being developed to recognize dangerous situations on living roads and to provide warning services. In this study, a collision detection algorithm was developed to prevent collision accidents between moving objects, by using object type and location information provided from CCTV monitoring devices. To determine the exact collision between moving objects, an object movement model was developed to predict the range of movement by considering the moving characteristics of the object, and a collision detection algorithm was developed to efficiently analyze the presence and location of the collision. The developed object movement model as well as the collision detection algorithm were simulated, in a virtual space of an actual living road to verify performance and derive supplementary matters.

• 한국컴퓨터그래픽스학회논문지
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• 제30권3호
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• pp.43-49
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• 2024

핸드트래킹이 주된 조작이 되는 기기가 출시됨에 따라 현재 확장현실 분야의 관심사 중 하나는 핸드트래킹이다. 핸드트래킹은 사용자에게 몰입감 및 현실감 측면에서 장점이 있으며 그에 따라 교육, 엔터테인먼트, 의료 등 다양한 분야에서 활용되고 있다. 활쏘는 동작은 양손을 동시에 써야하는 동시에 표적을 맞추기 위해서는 정교함을 요하는 과거 문화적 스포츠적 의의를 가지는 동작이다. 본 연구는 이러한 활쏘는 동작을 구현하는 것을 목표로 했다. 따라서 본 논문은 유니티가 제공하는 XR Hands 패키지를 활용하여 손동작을 인식하도록 했으며 기반이 되는 OpenXR 에 대한 탐구했다. 최종적으로는 활 쏘는 동작을 구현했고 메타 퀘스트 2 에서 테스트했다.

• 대한한의학회지
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• 제37권1호
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• pp.125-134
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• 2016

Objectives: The aim of this study is to develop diagnostic questionnaires for the lumbar movement system impairment syndrome. Methods: We had reviewed the previous study and literature and organized various checkable items for differential diagnosis of five different lumbar movement system impairment syndromes. Next, we selected items which can be developed as questionnaire items. Finally, we conducted face validity study with eight Korean medicine doctors and survey research for the importance score of the items with three experts. Results: We developed a diagnostic questionnaire as followings: 6 items for lumbar extension syndrome; 5 items for lumbar flexion syndrome; 6 items for lumbar rotation syndrome. With the 2 rounds of survey research, we could bridge the differences of the importance score of each items. Conclusions: Questionnaire for the diagnosis of movement system impairment syndrome was developed. With this questionnaire, objective diagnosis of lumbar movement system impairment syndrome can be expected. This tool may also be used for detecting sub-health status of musculoskeletal systems.

• 대한물리의학회지
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• 제13권1호
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• pp.73-80
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• 2018

PURPOSE: The purpose of this study was to investigate the immediate effects of inspiratory muscle training on diaphragm movement and pulmonary function in healthy women. METHODS: The subjects of the study were 27 young women between ages 19 and 22 years who had no history of orthopedic damage for the last 6 months. The 27 participants were randomly selected and spontaneously participated and consented to the purpose of the study. This study measured diaphragm movement and pulmonary function under two different conditions, before and after inspiratory muscle training. Ultrasonography is appropriate for measuring diaphragm movement, and Pony Fx is appropriate to measure pulmonary function such as forced vital capacity (FVC), forced expiratory volume in 1 second ($FEV_1$), $FEV_1/FVC$ ratio, and peak expiratory flow (PEF) before and after inspiratory muscle training. Paired t-test with a significant level of .05 was used for statistical analysis. RESULTS: As a result, diaphragm movement significantly increases 1.45cm from before inspiratory muscle training (p<.05). Also, FVC, $FEV_1$, and FEP significantly increase 11.25%, 6.96%, and 8.18%, respectively, from before inspiratory muscle training (p<.05). CONCLUSION: The diaphragm movement and pulmonary function of the healthy women in this study were in stantly affected by inspiratory muscle training. From these results, we need to confirm effects of inspiratory muscle training on clinical patients such as pulmonary disease.

• 대한물리의학회지
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• 제13권1호
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• pp.121-128
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• 2018

PURPOSE: This study assessed the effect of exercise intervention methods on diaphragm movement, pulmonary function, and pulmonary strength in children with cerebral palsy (CP). METHODS: A total of 28 children with CP were randomly allocated to the general exercise group (n=9, GEG), respiratory exercise group (n=10, REG), and intensive exercise group (n=9, IEG). The exercise intervention was performed for 12 weeks. This study measured diaphragm movement, pulmonary function, and pulmonary strength under two different conditions before and after each exercise. Ultrasonography was used for measuring diaphragm movement, and Pony Fx was used to measure the forced expiratory volume in one second ($FEV_1$), peak expiratory flow (PEF), maximum inspiratory pressure (MIP), and maximum expiratory pressure (MEP). A Mann-Whitney test and ANOVA with a significance level of .05 were used for statistical analysis. RESULTS: Significant change was observed between the REG and the IEG as well as between the GEG and the IEG (p<.05). No significant difference was observed between the GEG and the REG. The diaphragm movement, $FEV_1$ PEF, MIP, and MEP were most improved in the IEG (p<.01). CONCLUSION: This study confirmed that intensive exercise is the most effective treatment method for improving diaphragm movement and respiratory function in CP children.

• 한국지역지리학회지
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• 제15권5호
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• pp.590-603
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• 2009

본 연구는 북간도 지역의 항일독립운동에 대한 지리학적 차원에서의 연구로서 북간도 지역에서 민족교육운동의 핵심이었던 민족학교의 입지가 한인들의 독립운동 의지와 일본과 중국 정책의 영향으로 말미암아 어떻게 변화되었는지에 대해 살펴보았다. 그 결과를 요약하면 다음과 같다. 첫째, 한인촌이 집중된 곳에는 대부분 민족학교가 설립되어 양자는 밀접한 관계를 나타내었다. 양자 모두 용정을 중심으로 한 평야지역으로부터 공간적으로 확산되어가는 양상을 나타내었다. 둘째 교통과의 관계에 있어서는 3.13운동 이전에는 주요 간선도로와 인접한 지역에 학교의 비중이 높았으나 3.13운동 이후에는 약간의 감소를 보였다. 셋째, 민족학교는 일본과 중국 양측의 압박으로 인해 힘든 발전 과정을 겪었다. 일본인이 설립한 학교는 민족학교가 많은 지역에 집중함으로써 양자는 밀접한 관계를 나타내었다. 민족학교와 중국인 설립학교와의 관계는 3.13운동 이전에 양자의 집중지는 비슷하였지만 3.13운동 이후에 중국인 설립학교는 조선인이 상대적으로 적은 지역으로 확대되는 양상을 보였다.