• 한국산학기술학회논문지
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• 제12권8호
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• pp.3626-3635
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• 2011

모듈러 로봇은 기존 바퀴 혹은 다리를 가지고 있는 이동용 로봇이 가지는 공간 이동의 제한성을 극복하기 위해 개발된 로봇이다. 이는 다리형 로봇의 경우 이동 속도나 지형 등에 있어 균형 잡기 등에 어려움이 존재하며, 바퀴 이동형 로봇의 경우 요철과 둔턱 등을 극복하는데 한계를 지니게 된다. 이에 비해 모듈러 로봇의 경우 형상의 변경이 용이하며 이를 통해 자유로운 이동이 가능하여 이동성능에 제약을 극복할 수 있는 로봇이다. 하지만 모듈러 로봇의 경우 구동메커니즘 뿐만 아니라 형상 변경에 따른 결합 분리 메카니즘에 대한 연구도 진행되어야 한다. 이에 본 논문에서는 네 종류의 모듈러 로봇 결합 메커니즘을 제안하였다. 또한 각 모듈러 로봇 결합 메커니즘에 따른 결합 알고리즘을 제시하였다. 그리고 제안된 구조를 실제 구현하여 구조의 유용성을 검증하였다.

• 한국지능시스템학회논문지
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• 제13권1호
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• pp.6-11
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• 2003

신경회로망은 최근 복잡하고 정형화가 어려운 문제의 해결을 위해 지능적인 기법이 제안되고 있다. 모듈라 네트워크는 복잡한 문제를 부문제로 나누어 해결한다. 퍼지 시스템은 복잡한 문제를 작은 부문제로 나누어 해결한다는 점에서 모듈라 네트워크와 유사하다. 하지만 퍼지 시스템의 경우에도 입력공간을 전문가가 직접 분할하고, 룰을 만들어야 한다는 단점이 있다. 이러한 단점을 해결하기 위해 퍼지 뉴럴 네트워크가 제안되었다. 하지만 입력의 증가에 따른 규칙수가 지수적으로 증가하는 문제점을 안고 있다. 본 논문에서는 이런 문제점을 계층적 구조를 설계함으로서 해결하였다. 또한, 제안된 구조는 앞선 모듈의 출력이 후건부에만 기여하는 구조를 사용하였다. 제안된 구조를 사용함으로써 입출력관계가 더욱 이해하기 쉬워졌으며, 설계의 어려움을 해결했다. 또한 룰이 수가 작다는 장점이 있다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2010년도 추계학술대회 논문집
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• pp.211-212
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• 2010

• Structural Engineering and Mechanics
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• 제76권3호
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• pp.367-378
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• 2020

This paper presents a new design concept for ocean nuclear power plants (ONPPs) using a tension leg platform (TLP). The system-integrated modular advanced reactor, which is one of the successful small modular reactors, is mounted for demonstration. The authors define the design requirements and parameters, modularize and rearrange the nuclear and other facilities, and propose a new total general arrangement. The most fundamental level of design results for the platform and tendon system are provided, and the construction procedure and safety features are discussed. The integrated passive safety system developed for the gravity based structure-type ONPP is also available in the TLP-type ONPP with minor modifications. The safety system fully utilizes the benefits of the ocean environment, and enhances the safety features of the proposed concept. For the verification of the design concept, hydrodynamic analyses are performed using the commercial software ANSYS AQWA with the Pierson-Moskowitz and JONSWAP wave spectra that represent various ocean environments and the results are discussed.

• 복식
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• 제64권7호
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• pp.156-171
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• 2014

This study attempted to comprehend the usage of the modular system in fields through literature review and objective research, as well as analysis of its expression characteristics in fashion. It tried to provide inspiring visual data for the fashion design of the modular system. After analyzing architecture and product-related books, Internet data and advanced research, the four expression characteristics of the modular system were obtained. Firstly, the formative expression characteristics of the modular system in fashion were simplicity, extensibility, variability and diversity. Secondly, of the formative expression characteristics expressed in modern fashion, simplicity (30%) was the highest, followed by extensibility (27%), diversity (22%) and variability (21%). Thirdly, simple silhouette and structure were used to express simplicity, usually simple geometric figures. In contrast, extensibility was expressed through the expansion and exaggeration of the area, length and volume of the clothes. In terms of variability, the typical characteristics of modules were reflected. For diversity, heterogeneous materials were used, and informality was expressed.

• 로봇학회논문지
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• 제11권3호
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• pp.163-171
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• 2016

A modular manipulator in serial-chain structure usually consists of a series of modularized revolute joint and link modules. The geometric shapes of these modules affect the number of possible configurations of modular manipulator after assembly. Therefore, it is important to design the geometry of the joint and link modules that allow various configurations of the manipulators with minimal set of modules. In this paper, a new 1-DoF(degree of freedom) joint module and simple link modules are designed based on a methodology of joint configurations using a series of Rotational(type-R) and Twist(type-T) joints. Two of the joint modules can be directly connected so that two types of 2-DoFs joints could be assembled without a link module between them. The proposed geometries of joint and link modules expand the possible configurations of assembled modular manipulators compared to existing ones. Modular manipulator system of this research can be a cornerstone of user-centered markets with various solution but low-cost, compared to conventional manipulators of fixed-configurations determined by the provider.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.411-414
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• 2015

The purpose of this study is to conduct a comparative analysis between Korea and the United States of the supply process of unit modular housing at both the factory production phase and the transportation and lifting phase, as part of an attempt to invigorate the unit modular housing market in Korea. Unlike the practice in the United States, one of Korea's unique characteristics is that the floor is constructed with reinforced concrete and hot water heating system. To do this, the wet method in Korea is used that includes concrete placement, curing and constructing hot water floor heating system at the factory production phase, which results in a longer production time and also requires the lifting of heavier loads. In the United States, interior and exterior finishing works of modular housing are performed by different companies, and the distance between the unit module factory and the construction site is quite far. This kind of dualized production structure may cause confusion when it comes to schedule management, procurement management, and stock management. Moreover, problems caused by external environmental factors such as wind and rainfall were reported in the course of long-distance transportation. The results of this case comparison are expected to provide fundamental data that will reduce the amount of trial and error in the unit module production, transportation and lifting work in Korea, which has a comparatively small number of unit modular housing cases.

• 대한건축학회논문집:구조계
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• 제35권8호
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• pp.157-168
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• 2019

Modular Construction is regarded as having enhanced safety compared to traditional construction since most of modular manufacturing process in plants. Unlike general consideration for safety in modular construction, several industrial accident data and studies have pointed out that the accident rate of modular construction is not enough less as much as the practitioners have expected. It means that there is a clear need for improvement of safety management in modular construction. To enhance safety, it is necessary to identify the type and cause of accident through accident cases in order to prevent safety accident in advance. In this consideration, this study analyzed the types and causes of accidents through root cause analysis procedure with accident cases of U.S. OSHA. The classification was carried out in the order of process type, accident type and cause of accident. By following the classification criteria in this study, the causal factor was derived and the root cause map was created. Based on the analysis results, cross-analysis was conducted and it is shown that activity characteristics of modular construction are related to safety accidents. In addition, prevention methods to reduce safety accident by major activity are presented in terms of organizational, educational and technical aspects. This study contributes that the result can be used as the basic safety management in the manufacturing and construction process of modular construction.

• 한국구조물진단유지관리공학회 논문집
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• 제19권2호
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• pp.143-150
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• 2015

현재 국내 모듈러 구조물은 저층의 단독주택 및 군 병영생활관에 한정되어 있는 실정이며, 적층식 모듈러 구조물에 대한 표준화된 구조설계 방법이 없으므로 구조물의 시공과정에서 모듈의 양중이나 운송 시 발생되는 관성력, 양중 시 구조물에 대한 풍하중의 영향, 모듈의 적층 설치 시 충격력 등에 대한 검토가 일반적으로 이루어지고 있지 않다. 따라서 본 연구에서는 대상 모듈러 시스템에 대한 단계별 시공방법을 살펴보고, 각 시공단계에 대한 구조해석 시 경계조건 및 하중 작용위치를 결정하였다. 또한 모듈의 양중 및 차량운반 시 각각의 속도에 따른 관성력을 산정하였으며 모듈의 적층설치 작업 시 양중속도에 따른 충격하중과 양중에 의한 설치작업 시 순간풍속에 의한 풍하중을 산정하였다. 제안된 방법을 토대로 대상 모듈러 시스템에서 양중 시와 운송 시, 설치 시 등 시공단계별 하중크기 결정조건을 변화시켜 구조검토를 수행하였으며 구조적으로 안전성이 확보되는 시공조건을 도출하였다.

• 한국멀티미디어학회논문지
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• 제6권4호
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• pp.610-619
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• 2003

This paper presents a concept of cellular automata and a modular exponentiation algorithm and implementation of a basic EIGamal encryption by using cellular automata. Nowadays most of modular exponentiation algorithms are implemented by a linear feedback shift register(LFSR), but its structure has disadvantage which is difficult to implement an operation scheme when the basis is changed frequently The proposed algorithm based on a cellular automata in this paper can overcome this shortcomings, and can be effectively applied to the modular exponentiation algorithm by using the characteristic of the parallelism and flexibility of cellular automata. We also propose a new fast multiplier algorithm using the normal basis representation. A new multiplier algorithm based on normal basis is quite fast than the conventional algorithms using standard basis. This application is also applicable to construct operational structures such as multiplication, exponentiation and inversion algorithm for EIGamal cryptosystem.