• 산업경영시스템학회지
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• 제23권57호
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• pp.77-85
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• 2000

The purpose of this study is to analyze problems of KS measurement of the wheelchair and a pair of crutches and to propose proper measurements of the wheelchair and a pair of crutches for the posteriori handicapped. Research method is as following ; First, it is compared that Anthropometry of Korean and Japanese adults relevance with design measurement of the wheelchair and a pair of crutches. Second, we compared measurements of KS wheelchairs with measurements of the wheelchair manufactured by the T aids company and the D aids company, and then compared and analyzed differences of measurements about each part of the wheelchair. Third, we compared measurements of a pair of crutches of an fixed and an elastic type with anthropometry and analysis. The result, measurements of KS wheelchair and KS a pair of crutches shows unsuitable to Korean adults. It may cause handicapped. We proposed measurements of the aids(the wheelchair and a pair of crutches) proper to the handicapped of Korean adults with improvement of these problems.

• 대한의용생체공학회:의공학회지
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• 제17권3호
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• pp.347-354
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• 1996

This paper presents digital hearing aids signal processing system in WT(wavelet transform) domain. For implementation of hearing aids in WT domain, the gain in frequency domain is approximated in WT domain. We also present the gain selection algorithm to deal with the change of input signal power. Most transform methods produce blocking effect, and this effect degrades the convergence rate of feedback canceller. As a solution, we proposed wavelet transform bascd feedback canceller. To evaluate the performance, we compared it with LOT (lapped orthogonal transform) method in the frequency domain. This system has not shown the blocking effect, and improves convergence rate as compared with the LOT based feedback canceller.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1996년도 춘계학술대회
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• pp.248-251
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• 1996

In this paper, we presented WT(wavelet transform) domain feedback canceller in hearing aids system. Most transform methods produce blocking effect and this effect degrades the performance of feedback canceller and overall hearing aids system. As a solution we proposed WT based feedback canceller. The performance of this new approach was compared with LOT (lapped orthogonal transform) based method in the frequency domain. As a result, WT based feedback canceller has not shown the blocking effect and improved convergence rate as compared with the LOT based feedback canceller.

• 한국항행학회논문지
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• 제10권3호
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• pp.226-234
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• 2006

항로표지는 해상에서의 인명과 재산의 안전을 확보하기 위하여 매우 중요한 항행지원시설이다. 하지만 이 시설을 설계하고 설치 및 관리 그리고 이용하는 과정에서 매체별 또는 관리주체별로 서로 상이한 위치정보를 포함하고 있다. 항로표지의 위치신뢰도에 가장 영향을 미치는 요인으로서는 조류의 방향과 수심의 함수가 생성하는 선회반경이 있고, 위치측정의 주요 수단인 수평육분의 및 dGPS로 인한 시점별 변수가 있다. 본 논문은 이러한 잠재오차를 수치적으로 해석하고, 요인별 영향력과 감소방안을 제시하였다.

• 한국항해항만학회지
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• 제34권5호
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• pp.337-342
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• 2010

오늘날과 같이 해상 교통량이 많은 상황에서는 선박의 안전운항을 위해 항로표지의 역할이 더욱 중요해지고 있다. 국제항로표지협회에서는 항로표지 통신시스템의 체계화된 기능 및 서비스기반에 관한 국제표준화를 추진하고 있다. 본 논문에서는 e-NAV에 대비한 항로표지 통합 관리 및 관련정보의 서비스를 위해 항로표지 정보 서비스 통신망을 설계하고 실험한다. AIS 기반의 항로표지 통신망은 외부 정보 수집과 실험을 위해 AIS AtoN과 합성(Synthetic) 및 가상(Virtual)을 포함하여 설계했다. 시스템 내부적으로는 AIS와 WCDMA 등의 무선망을 연동하는 복합구조의 통신망을 구성했다. 육상의 통신을 연계한 항로표지 정보 서비스 통신망을 통해 국제표준에 부합되는 AIS 기반 항로표지 정보를 제공할 수 있다.

• 한국정보통신학회논문지
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• 제25권12호
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• pp.1927-1934
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• 2021

선박의 안전한 항해를 돕기 위하여 해상에 항로표지를 설치하여 운영하고 있다. 해상 ICT(Information and Communications Technology)의 발달로 AtoN AIS( Automatic Identification System) 및 CDMA(Code Division Multiple Access), LTE(Long Term Evolution) 등 다중통신망을 이용하여 육상에서 해상 항로표지의 상태를 감시하고 제어가 가능해졌다. 현재 항로표지 관리운영시스템은 지방해양수산청의 운영상황에 따라 독자적으로 개발 및 운영되고 있어 정보를 통합적으로 관리하기 어렵다. 또한, e-Navigation 및 무인운항선박 도입에 대비하여 체계적이고 일원화된 항로표지 정보가 요구된다. 본 논문에서는 항로표지 정보 국제표준(S-201)을 적용한 항로표지 통합관리운영 표준 소프트웨어 설계 및 개발을 수행하였다. 이를 통하여 체계적이고 지속적인 항로표지 정보의 제공 및 효과적인 항로표지 관리가 가능할 것이다.

• 한국의류학회지
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• 제48권1호
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• pp.108-119
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• 2024

In this study, we aimed to propose enhancements to the dimensions and design of walking aids tailored for elderly women. Specifically, we focused on wheeled walking assistance devices and aligned each structural component with the appropriate human body dimensions to suggest appropriate product dimensions organized by size clusters, aiming to maximize the practicality of the results. We extracted essential factors required for product design, including human body size elements. The dimension extraction method was clustered to establish connections between key human body parameters-such as height, weight, and age groups-and product dimensions. We conducted a comparative analysis of walking aid product dimensions according to the design elements and sizes of models currently available in the market. The outcomes of this study offer objective, data-driven insights into areas where existing models on the market could benefit from improvement and we anticipate that the findings of this study will provide a solid, quantitative foundation for individuals when selecting the most suitable model for their needs.

• 대한조선학회지
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• 제18권4호
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• pp.31-40
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• 1981

Nowadays we needs the ship design ability strongly for our shipbuilding industry to attain the 2nd position among the competitive world marine industries. But we have short experience in ship design, so several ship design terminologies are used without clear understandings. Here, papers on ship design procedure and design methodology are summarized with some investigation about our present status. In addition, the state arts and new developments of Computer Aided ship Design in advanced ship building countries are treated. It is hoped that we-ship designers of our country-do have common understandings about the ship design terminologies.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권11호
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• pp.3064-3082
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• 2023

During the last decade, several Electronic Orientation Aids devices have been proposed to solve the autonomy problems of visually impaired people. When hearing is considered the primary sense for Visually Impaired people (VI) and it is generally loaded with the environment, the use of tactile sense can be considered a solution to transmit directional information. This paper presents a new wearable haptic system based on four motors implemented in shoes, while six directions can be played. This study aims to introduce an interface design and investigate an appropriate means of spatial information delivery through haptic sense. The first experiment of the proposed system was performed with 15 users in an indoor environment. The results showed that the users were able to recognize, with high accuracy, the directions displayed on their feet. The second experiment was conducted in an outdoor environment with five blindfolded users who were guided along 120 meters. The users, guided only by the haptic system, successfully reached their destinations. The potential of tactile-foot stimulation to help VI understand Electronic Orientation Aids (EOA) instructions was discussed, and future challenges were defined.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2004년도 봄 학술발표회 논문집
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• pp.81-86
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• 2004

For the development of system framework which provides multidisciplinary design environment, the integration of analysis codes written in various computer languages, the integration of CAD and DBMS, and the development of complex GUI are indispensible In this study, three different design frameworks which have been developed in Konkuk University with the aids of a company and other university, are compared and analyzed with respect to the analysis code integration method and the module interface technique. Moreover, the way to develop an efficient framework is proposed.