• 한국CDE학회논문집
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• 제19권2호
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• pp.111-118
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• 2014

In tangible augmented reality (AR) environments, the user interacts with virtual objects by manipulating their physical counterparts, but he or she often encounters awkward situations in which his or her hands are occluded by the augmented virtual objects, which causes great difficulty in figuring out hand positions, and reduces both immersion and ease of interaction. To solve the problem of such hand occlusion, skin color information has been usefully exploited. In this paper, we propose an approach to simple and effective construction of a skin color map which is suitable for hand segmentation and tangible AR interaction. The basic idea used herein is to obtain hand images used in a target AR environment by simple image subtraction and to represent their color information by a convex polygonal map in the YCbCr color space. We experimentally found that the convex polygonal map is more accurate in representing skin color than a conventional rectangular map. After implementing a solution for resolving hand occlusion using the proposed skin color map construction, we showed its usefulness by applying it to virtual design evaluation of digital handheld products in a tangible AR environment.

• 전자공학회논문지 IE
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• 제46권4호
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• pp.66-72
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• 2009

환경분야에서 산업화와 도시화에 따른 수질오염의 문제를 해결하기 위해 오수처리시설을 제어 및 감시하는 장치들이 개발 되어 왔다. 본 연구에서는 지역에 설치된 오수처리시설의 구동 모터와 주변 환경 상태를 제어하고 감지하기 위하여 시리얼 인터페이스를 갖는 내부 네트워크로 상호 연결한 효율적인 모듈 시스템의 설계방법에 대하여 제안하였다. 본 연구에서 제안된 방법은 급변하는 환경시장에서 요구되는 조건과 환경인자들의 사양에 대하여 보다 적응성 있고 유연한 설계 기법을 제공하리라 기대된다.

• 한국통신학회논문지
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• 제34권11C호
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• pp.1113-1121
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• 2009

본 논문에서는 기지국간 간섭이 큰 다중기지국 환경에서 multiple-input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) 시스템을 위한 파일럿 시퀀스 설계 방법 및 채널 추정 기법을 제안한다. 제안 파일럿 시퀀스의 경우 평균 제곱 오류치 (Mean Square Error)를 최소화시키며, 설계된 파일럿에 적합한 채널 추정 방법을 제안한다. 제안된 파일럿 시퀀스 및 채널 추정 기법은 추 시퀀스의 상관관계 특성을 이용해 설계되며 모의실험을 통해 설계된 파일럿 시퀀스를 이용한 채널 추정 기법이 기지국간 간섭을 완화에 효과적임을 보여준다.

• International Journal of Naval Architecture and Ocean Engineering
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• 제7권4호
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• pp.739-749
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• 2015

A new conceptual dual-buoy Wave Energy Converter (WEC) for the enhancement of energy extraction efficiency is suggested. Based on actual wave data, the design process for the suggested WEC is conducted in such a way as to ensure that it is suitable in real sea. Actual wave data measured in Korea's East Sea (position: $36.404N^{\circ}$ and $129.274E^{\circ}$) from May 1, 2002 to March 29, 2005 were used as the input wave spectrum for the performance estimation of the dual-buoy WEC. The suggested WEC, a point absorber type, consists of two concentric floating circular cylinders (an inner and a hollow outer buoy). Multiple resonant frequencies in proposed WEC affect the Power Ttake-off (PTO) performance of the WEC. Based on the numerical results, several design strategies are proposed to further enhance the extraction efficiency, including intentional mismatching among the heave natural frequencies of dual buoys, the natural frequency of the internal fluid, and the peak frequency of the input wave spectrum.

• 대한원격탐사학회지
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• 제19권1호
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• pp.81-89
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• 2003

A provision of spatial information is expected to make a market explosion in various fields. A distribution of spatial data on wireless mobile environments indicates a huge expansion of mobile technology as well as a spread of geospatial applications. For high-qualified spatial information, the 4S technology Project that is integrating four kinds of spatial systems is currently being executed with the goal of nationwide integration of spatial data and spatial information systems. In terms of network environments, a mobile ad hoc network where mobile terminals communicate with each other without any infrastructures has been standardized for the next generation mobile wireless network. With respect to the future technologies for spatial information, it is necessary to design 4S applications on mobile ad hoc networks. This paper addresses the issue, which is proposing design concepts for distributing 4S spatial data on mobile ad hoc networks and for ad hoc styled 4S applications.

• 로봇학회논문지
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• 제16권3호
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• pp.199-206
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• 2021

The robot is an effective means to perform repetitive tasks quickly and accurately. It could be more effective in dangerous environments where human is difficult to access. The construction site is a dangerous environment with a high possibility of industrial accidents where heavy work is frequently carried out at a high place. In particular, an accident in the construction site is highly likely to lead to a severe disaster. Of course, various technologies are being developed to monitor the safety of workers in construction sites and prevent accidents, but there is a limit to eliminate the risk of accidents. Therefore, it is necessary to make efforts to replace workers exposed to dangerous environments with equipment or robots that could be controlled remotely in a more active way. In this study, Remote Precise Installation System was proposed to replace the workers exposed to the risk of accident at a high place during the bridge construction. Also, the conceptual design and analytical reviews of this system were carried out. Suppose Remote Precise Installation System is developed according to the derived concept and the target performance. In that case, this system is expected to be applied as a technology that can effectively replace the workers at the bridge construction site.

• 산경연구논집
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• 제14권12호
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• pp.33-41
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• 2023

Purpose: This study's primary goal is to investigate and evaluate the critical contributions made by industrial-organizational psychologists to raising worker job satisfaction. The study aims to offer insights that can enhance workplace environments, improve organizational processes, and increase employees' general well-being by looking at the particular contributions made by this field. Research design, data and methodology: The study design, data collection strategies using the literature content analysis allow for a thorough analysis and synthesis of the body of knowledge about industrial-organizational psychologists' contributions to improving worker job satisfaction. This method entails a sequential procedure that includes formulating research questions and locating pertinent studies. Results: Numerous previous works have indicated that industrial-organizational psychologists are essential in determining how an organization is run and how satisfied its workforce is with their jobs. The four major roles (Job Design, Leadership, Workplace Culture, and Employee Development) that were found after a thorough analysis of the body of current literature are presented in this section. Conclusions: In sum, the roles found in this study provide organizations with a framework for creating work environments that prioritize the well-being and overall growth of the people who make up the organization while also helping them negotiate the complexity of the modern workplace.

• 한국의상디자인학회지
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• 제16권3호
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• pp.191-200
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• 2014

Employees overseas have a need to prepare according to the different environments and industrial structures between countries. Therefore, to investigate qualities for fashion designers to possess when they work abroad, especially in the United States, this study compared the level of knowledge required to fulfill the work of fashion design in both South Korea and the United States. Responses from workers who are engaged to fashion design from the representative online career information systems of two countries, 'Worknet' in South Korea and '$O^*Net$' in the United States, were used as data. Looking at the result derived from the analysis of this study, first by comparing various statistical indicators, results showed the difference between knowledge level required to fashion designer in South Korea and in the United States. Even with the same type of job, because environments and industrial structures of each country are dissimilar, a different level of knowledge will be required in order to perform their tasks. Second, fashion designers in both South Korea and the United States required a high level of knowledge in the 'fine arts', 'administration and management', 'production and processing', and 'design' to perform their duties as a fashion designer. As a result, both countries have similarities that fashion designers need to possess a high level of the knowledge in areas such as 'production of products' as well as 'sales of products'. Furthermore, human relationship field of knowledge such as 'counseling', 'psychology', and 'communication' appeared to be more necessary to fashion designers in South Korea than those in the United States. On the other hand, higher degree of knowledge of 'machines and tools', ' fine arts', and 'transportation' appeared to be more necessary to fashion designers in the United States than those in South Korea.

• 한국실내디자인학회논문집
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• 제25권4호
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• pp.60-67
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• 2016

Falls are accidents that can happen throughout the overall period of human life and their results are very fatal and have a serious negative effect on individuals and society. In case of aged people, even though they live in places where dangerous risks of falls are prevalent, they cannot improve their residential environment for themselves. Therefore, this study intends to prove the effects of fall prevention education by providing fall prevention education to spatial design majoring students in order to improve their perception about the falls and fall prevention environments and their social responsibility as a designer. This study was designed as Quasi-experimental study, and 121 beginners to spatial design received the education. As a result, the effects of education was proved by showing improvements on their awareness about the fall risks, the importance of fall prevention environment and social responsibility as a designer. In addition, after the education students could know more about spatial elements for fall prevention and they specified the details of important environmental factors for fall prevention. Generally, fall prevention education has been given to aged people and this is a first example of fall prevention education that was given to younger generation. It is meaningful that fall prevention education has changed the awareness of the students to help them work in spatial environment design with a strong sense of responsibility as an expert of spatial designer in future.

• 실천공학교육논문지
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• 제14권1호
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• pp.27-35
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• 2022

본 연구의 목적은 최근 비대면 교육(online mode)의 형태로 빠르게 전환되고 있는 시점에서 여러 대학 간의 디지털 기술을 토대로 대학 간 공유와 협력을 공유할 수 있도록 비대면 환경에서의 산학협력형 캡스톤 디자인 교과목을 개발하는데 있다. 이를 위하여 비대면 환경, 캡스톤 디자인 등의 문헌 및 선행 연구를 분석하고 비대면 환경에서의 산학협력형 캡스톤 디자인 교과목 개발 모델을 개발하여 적용 방안을 제안하였다. 웨어러블 캡스톤 디자인 프로그램을 시범 적용하여 학생 인터뷰, 설문을 통해 실효성을 확인하고 수정, 보완하였다. 이는 비대면 환경에서 산학협력형 캡스톤 디자인 수업 계획, 개발 시 기초자료 제공 및 단계별 운영가이드로서 활용될 수 있을 것이다.