• 정보과학회 논문지
• /
• 제43권8호
• /
• pp.857-868
• /
• 2016

소프트웨어 생태계의 시장 중심 개발 환경에서 소프트웨어 기업은 제품의 성공을 위해서 자신의 비즈니스와 고객에게 높은 가치를 제공할 수 있어야만 시장 경쟁력을 가지고 생존할 수 있다. 요구공학적 관점에서 제품 요구사항 선택을 통한 가치 제공을 위해서 이해관계자들 각자의 다른 이해가 조정되어 합의되어야 한다. 즉, 요구공학 단계에서 높은 가치 창출을 고려하는 합의된 요구사항을 선택할 필요가 있다. 기존 연구들은 소프트웨어 생태계에서 요구되는 이해관계자들의 다른 이해에 대한 요구공학적 기법의 필요성을 언급하였을 뿐, 구체적인 가이드라인 및 수행 방법에 대하여 제안하지 않았다. 본 연구에서는 요구공학에서 사용되는 Goal 개념 기반으로 협상 참가자의 의도를 분석하고 이를 바탕으로 요구사항 충돌의 근거를 구조화하여 관리할 수 있도록 한다. 궁극적으로 협상 참가자의 이기적 행동을 바탕으로 게임 이론적 개념을 이용한 요구사항 충돌 해결 방법론을 제안한다.

• 한국안전학회지
• /
• 제19권3호
• /
• pp.32-39
• /
• 2004

This papers describes on the experimental consideration for the intrinsically-safe explosion-proof capability of rechargeable battery's body about main item rechargeable battery and cellular phone battery which is selling in domestic that IEC(International Electrotechnical Commission) recommend the measurement of ignition limit by short circuit of rechargeable battery and temperature increase test to use a explosion grade Group IIC type of explosion-proof type apparatus test an object of hydrogen gas. Because of that there are many different results for existence or nonexistence for ignition by different company and different types. It is concluded that the maximum of self temperature increasing by spark circuit of rechargeable battery is $180^{\circ}C$ in case of Nickel-Hydrogen and $110^{\circ}C$ in case of Nickel-Cadmium. The reaction of cellular battery for external temperature have following processes. It is confirmed that the temperature of reaction is rise slantly as the ambient temperature rising, then exterior shape of one is swell up and change when the temperature of ambient reach to about $130\~140^{\circ}C$, and when reach to about $160^{\circ}C$ the battery is blown up. Therefore, it is considered that have to be in considering selection of rechargeable battery using in itself due to different ignition limits of various rechargeable battery when the portable electric containing rechargeable battery are designed, produced and used, the characteristics and the proper safety factors of devices.

• 천문학회보
• /
• 제36권2호
• /
• pp.126.1-126.1
• /
• 2011

The SPICA (SPace Infrared Telescope for Cosmology & Astrophysics) project is a next-generation infrared space telescope optimized for mid- and far-infrared observation with a cryogenically cooled 3m-class telescope. Owing to unique capability of focal plane instruments onboard SPICA, it will enable us to resolve many astronomical key issues from the star-formation history of the universe to the planetary formation. The FPC (Focal Plane Camera) is a Korean-led near-infrared instrument as an international collaboration. Korean consortium for FPC proposed a key instrument responsible for a fine guiding (FPC-G). The back-up of FPC-G will make scientific observations as well. We have examined the legacy science programs for FPC and performed the feasibility study for the fine guiding system. Recently, the international review process is now in progress, in order to make a selection of the focal plane instruments. Here, we report the current status of SPICA/FPC project.

• 한국CDE학회논문집
• /
• 제13권2호
• /
• pp.139-152
• /
• 2008

In order to survive worldwide competition, today's industries are experiencing strong pressure to introduce higher quality products with lower cost and shorter lead-time. Therefore, the role of design in the process of product development is increasing in significance. In this research, two methods for improving the design capability are proposed: construction of design environment and design automation using 3D CAD system. The designers and design process are the core of product design using 3D CAD system. In order to maximize the design performance, construction of the design environment including selection of a suitable system, designer training for best use of the system, establishment of an efficient design process, and stabilization of the environment are required. A method is suggested to construct design environment by systematizing the contents of the projects and consulting experiences carried out for various categories of business such as electronic devices, motorcycles, electricity parts, sanitary wares, injection molds, and die casing molds. Design automation helps reduce tedious and time-consuming jobs, simplify complicated and error-prone modeling and drawing works to shorten the lead time and improve the product quality. To develop a design automation system, understanding the process and the related knowledge on design are very important before implementing the system using API provided by 3D CAD system. In this research, an eight-step procedure is proposed for the development of a design automation system. These eight steps are analysis of needs, determination of specification, verification of specification using 3D CAD system, inspection of related API functions, programming, field test, application in practice, and maintenance. A case study in which five design automation systems in the design of turbine generators using the proposed method is introduced in detail. These systems play important roles in the generation of various output items including 3D models, drafts, material information, and NC data. The case study shows how effectively the design time is reduced and the quality improved using those systems.

• 복식문화연구
• /
• 제18권1호
• /
• pp.109-117
• /
• 2010

편성물은 여러 가지 형태의 편성 조직을 얻기 위해서 횡편기나 환편기 등의 다양한 니트 편기를 이용하여 다양한 형태의 니트 편환과 조건에 의해서 편성을 하게 된다. 입체적인 형태의 니트 편지는 각기 다른 니트 편환 조직의 병용, 다양한 편사의 이용, 또는 여러 가지 가공공정 등을 거쳐서 얻을 수 있다. 본 연구는 컴퓨터화된 자동 횡편기를 이용하여 편성에 있어서 기본이 되는 조직인 리브편과 펄편의 편성조직을 효과적으로 혼합 편성하여 새로운 형태의 입체 니트구조를 갖는 편지를 개발하는데 그 목적이 있다. 이러한 입체 니트조직을 바탕으로 하여 몇 가지 다른 형태의 입체구조를 갖는 편성물을 개발하고, 새로운 형태의 니트 패션 의복을 제작한다. 또한 리브편과 펄편에 의한 입체 편성조직의 원리와 특성 등에 대하여 논한다.

• 대기
• /
• 제29권5호
• /
• pp.689-698
• /
• 2019

Air pollution in urban areas has become a serious problem in the recent years. Especially, high concentrations of particulate matter (PM) cause negative effects on human health. Several studies suggest urban forest as a tool for improving air quality because of the capability of forests in reducing PM concentrations through deposition and adsorption using leaf area. For this reason, the National Institute of Forest Science plans to install in-situ observation stations for PM and biogenic volatile organic compounds (BVOCs) on a national scale to verify the net effect of forests on urban air pollution. To measure the quantitative change of PM concentrations due to the urban forest, stations should be located within and outside the forest area with respect to atmospheric circulation. In this study, we analyze the wind direction at the potential measurement sites to assess suitable locations for detecting the effect of urban forests on air quality in five cities (i.e. Gwangju, Daegu, Busan, Incheon, and Ilsan). This technical note suggests effective locations of in-situ measurements by considering main wind direction in the five cities of this study. A measurement station network created in the future based on the selected locations will allow quantitative measurements of PM concentration and BVOCs emitted from the urban forest and help provide a comprehensive understanding of the forest capabilities of reducing air pollution.

• International Journal of Control, Automation, and Systems
• /
• 제2권4호
• /
• pp.423-434
• /
• 2004

In this paper, we introduce a new topology of Self-Organizing Polynomial Neural Networks (SOPNN) based on genetically optimized Multi-Layer Perceptron (MLP) and discuss its comprehensive design methodology involving mechanisms of genetic optimization. Let us recall that the design of the 'conventional' SOPNN uses the extended Group Method of Data Handling (GMDH) technique to exploit polynomials as well as to consider a fixed number of input nodes at polynomial neurons (or nodes) located in each layer. However, this design process does not guarantee that the conventional SOPNN generated through learning results in optimal network architecture. The design procedure applied in the construction of each layer of the SOPNN deals with its structural optimization involving the selection of preferred nodes (or PNs) with specific local characteristics (such as the number of input variables, the order of the polynomials, and input variables) and addresses specific aspects of parametric optimization. An aggregate performance index with a weighting factor is proposed in order to achieve a sound balance between the approximation and generalization (predictive) abilities of the model. To evaluate the performance of the GA-based SOPNN, the model is experimented using pH neutralization process data as well as sewage treatment process data. A comparative analysis indicates that the proposed SOPNN is the model having higher accuracy as well as more superb predictive capability than other intelligent models presented previously.reviously.

• 한국지리정보학회지
• /
• 제16권2호
• /
• pp.30-46
• /
• 2013

본 논문은 생태마을 입지분석에 필요한 표준화된 분석요소와 평가기준을 정립하고, GIS를 이용한 생태마을 입지분석 모델을 개발하여 실제 적용한 결과를 제시하였다. ArcGIS 모델빌더(Model Builder)를 활용하여 개발된 모델은 사용자가 GIS 프로그램에 익숙하지 않더라도 쉽게 사용할 수 있도록 사용자 편의성을 최대한 고려하였다. 이를 위해 첫째, 기존연구 분석을 바탕으로 크게 자연환경 요소, 인문/사회적 요소, 법제적 요소로 분류되는 18개의 보편적이고 정량적인 생태마을 입지분석 요소와 평가기준을 선정하였고, 각 요소의 등급화 및 점수화 방안을 제시하였다. 둘째, ArcGIS 모델빌더를 활용하여 18개 입지분석 요소의 주제도 작성과정과 생태마을 입지로 적합한 지역을 도출하는 중첩분석 연산과정을 체계적으로 정리한 생태마을 입지분석 모델을 개발하였다. 셋째, 개발된 모델의 유효성을 검증하기 위하여 포항시 북구를 테스트 사이트로 생태마을 입지분석을 수행하였다.

• 전자공학회논문지S
• /
• 제36S권10호
• /
• pp.51-57
• /
• 1999

본 논문에서는 웨이브렛 신경회로망을 사용하여 알려지지 않은 비선형 시스템을 안정하게 제어하는 문제를 다룬다. 비선형 시스템의 정확한 제어는 함수를 근사화하는 데 사용되는 함수 근사화기의 정확성과 효율성에 의존한다. 그러므로 기준 함수의 선택이 자유롭고 함수 근사화 능력이 뛰어난 웨이브렛 신경회로망을 비선형 시스템 제어에 이용한다. 초기 웨이브렛 신경회로망 제어기를 설정하기 위해서 먼저 제어기 입력의 시-주파수 특성을 분석해서 웨이브렛 신경회로망 변수인 신축과 이동 값을 구한다. 다음에 Lyapunov 안정성 이론에 기초한 적응 법칙을 사용하여 연결강도를 조절한다. 이 직접 적응 웨이브렛 신경회로망 제어기를 비선형 시스템인 역 진자 시스템을 제어하는데 적용한다.

• 한국의상디자인학회지
• /
• 제17권4호
• /
• pp.41-54
• /
• 2015

The purpose of this study is to research on status of physical discomfort and clothing life including clothing inconvenience for enhancing self-reliance of elderly women, newly emerging consumer. The subject of research were 346 elderly women who aged 60 or older in Seoul and Seoul Suburbs. Survey consisted of questions about body discomfort, satisfaction and purchasing criteria of ready-to-wear, the inconvenience of clothing. The results of this study are as follows: Physical discomforts were generally associated with the ability to regulate body temperature. The biggest complaint of ready-to-wear was the price, and the next were the size and activity. In purchasing criteria, 'clothes to fit my body shape', 'clothes easy to put on and take off', 'comfortable clothes to work' showed high score. In clothing inconvenience, 'feel inconvenience due to several layers of clothing to avoid chilliness', 'feel heaviness in the waist due to tightness', 'feel chilliness even when wearing several layers of clothing in the winter' were the most uncomfortable parts. Subjects over the age of 80 years and needed the help of others in activities experienced more inconvenience in clothing life. It seems that body discomfort such as dulness of movement and loss of body temperature regulation capability due to aging had a influence on their clothing life. This problem could be improved by the adjustment of pattern allowance, the selection of the fastener, and the proper use of functional fabric. The results of this study will be used as a basis for development of the elderly women's clothing to increase convenience and mobility in everyday life.