• 한국환경과학회지
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• 제6권6호
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• pp.645-658
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• 1997

A study on ventilation design using the spreadsheet model is carried out to propose means of available design. A sample of complex ventilation system In the non-standard condition Is used to illustrate thins spreadsheet model. In developing the spreadsheet model, this study has attempted to it general by using computional equations and design parameters that can be readily applied to any spreadsheet software. Also, most design data is contained in the spreadsheet template. This template provides the same design information as the ACGIH worksheet, and operates Quickly and emclenuy, and is fiexible enough to use under different conditions. This spreadsheet model allows the ventilation engineer to design quickly and accurately the ventilation system, without spending too much effort In the design process. By storing on computer and diskette, the design data computed finally can be used as a permanent record of specific ventilation system, and because of finally to be able to design over and over again while making only slight changes to the Input data, the spreadsheet model is used availably to accomplish the design optimazation by redesign and troubleshooting by review from field measurements. Also, the spreadsheet model is available for designing ventilation system under different condition or evaluating existing system or design drawing, because changes In the layout or formulae can be readily made to fit the needs of the designer.

• 가족자원경영과 정책
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• 제14권4호
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• pp.101-126
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• 2010

This Qualitative case study focused on the National Pilot Project to make family-friendly communities. We examined the basic model of the family-friendly community proposed by the Ministry of Gender Equality and Family. One of the three local communities selected as family friendly models was chosen for observation and in-depth interview for its residents. The official performance report shows this project's process, results and future tasks. From the in-depth interview data, we defined the project's characteristics as the government and private sectors collaboration, model transformation from the original family friendly model to the production model, and we found some conflicts among residents upon financial issues and business items. The most important task is the vitalization of the community corporate body to realize this project's performance through these three years. And this study implicates to elaborate the rural family-friendly community model focused on income creating community redesign, different from the urban model focused on caring.

• 제어로봇시스템학회논문지
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• 제5권5호
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• pp.540-549
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• 1999

In this paper, the vibration suppression scheme based on a model referece approach is proposed. The vibration results from the coupling of the system and its frequency are given by the mechanical factors. In the proposed scheme, a low frequency vibration mode is transferred to high one. And also its damping ratio can be increased without any mechanical redesign. Therefore, bandwidth and open loop gain of the plant are increased and the performance of the system can be improved. This paper analyzes the proposed vibration suppression scheme, which is compared with the conventional control scheme for mechanical resonance suppression. For proving the realistic validity, we apply the proposed scheme to a LOS(Line Of Sight) stabilization system which has vibration effect. Finally, the proposed scheme is verified through simulations and experiments.

• 한국공작기계학회논문집
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• 제14권1호
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• pp.101-107
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• 2005

The objective of this study is structural analysis and optimum shape of rope brake. The finite element model was implemented to compute the stress, strain and friction force for rope brake. The ANSYS code was used for this analysis. Structural analysis are effected by position and height of reinforcement figure. The structural safety was examined by an establishment angle of the rope brakes which made apply to housing of the most suitable shape. The optimum shape of the rope brake was decided after stress and strain results were compared and examined.

• 농촌지도와개발
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• 제23권3호
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• pp.221-232
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• 2016

This study aims to improve the Korean Farmers' Occupational Disease and Injury Survey (KFODIS), using the questionnaire improvement model, and systematic appraisal tools. The questionnaire improvement model comprises three stages: pretesting, redesign, and field-testing. The survey was evaluated by 13 expert reviewers, using a modified version of the Questionnaire Appraisal System (QAS-99). Based on the results of pretesting, survey questions were modified at a group meeting of experts. To identify potential issues with the improved survey questions, data were collected from 20 interviews and 31 respondents before behavior coding analysis was conducted. The questionnaire improvement model and systematic appraisal tools were useful in identifying, evaluating, and correcting miscommunication and other similar issues in the KFODIS.

• 한국조경학회지
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• 제40권5호
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• pp.129-139
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• 2012

조경분야의 자격 체계는 최근 몇 년 사이 정부 및 지자체들의 지대한 관심, 타 분야의 견제, 건설업계의 내 외부 문제점 등 다양한 인자들에 의하여 위협 받고 있어 환경변화에 능동적으로 대처하고, 기술발전수준에 뒤떨어지지 않는 자격 본연의 기능을 확보함으로써 자격의 현장성 활용성을 강화하고 궁극적으로는 국가기술자격 분야에서 조경관련 자격의 신인도 및 위상을 강화시키기 위해서 국가기술자격을 산업현장의 수요에 맞도록, 그리고 기술변화를 제대로 반영하도록 '조경 분야의 국가기술자격의 틀 재설계'가 필요한 시점이 되었다. 본 연구는 국가기술자격에 대한 선행 연구로 국가기술자격의 현장성 및 통용성 제고, 그리고 자격종목 간 중복성 제거를 위한 '국가기술자격의 틀 재설계' 방법으로서 국가직무능력표준(NCS)을 활용, 조경 분야 자격종목 재설계 방안을 도출하여 하나의 모델을 제시하고자 한다. 연구결과, 국가직무능력표준과 조경 분야 자격종목의 출제내용을 상호비교 분석하여 현행 조경 분야 자격종목이 표준화된 기준에 제대로 설계되어 있는지를 검토하였으며, 이를 토대로 조경 분야의 현행 체계에서 조경기능장 종목을 신설하고, 동시에 기능사 등급을 세분화하여 조경식재과 조경시설물 기능사 자격증 종목을 분리 신설하는 것이 필요하다. 또한 연구 과정에서 자격 등급별 검정해야 할 능력단위들을 제시함으로, 향후 국가기술자격의 출제기준 및 관련 대학의 교과과정 프로그램을 구성시 기초자료로 제공되어 활용될 것이다.

• 한국의상디자인학회지
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• 제16권3호
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• pp.219-238
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• 2014

This study attempted to investigate present condition and product planning of global eco-fashion brands that harmonize fashion and sustainability. As research subjects, this study selected 97 oversea fashion brands mentioned in books related to eco-fashion, Black(2011), Brown(2010), Fuad-luke(2009). As for research methods, materials and ethical practices of these selected 97 brands through literature data and their internet site homepages. This study analyzed oversea eco-brands collected 26 British brands, 22 American brands, 36 European brands such as Germany, France, Italy, Sweden, Spain, Finland and so on, except Britain and 13 other regions including Japan, India, Canada, Mexico, and New zealand. In conclusion, the product planning characteristics of these oversea eco-fashion brands can be summarized as follows; community and fair trade, ecological and slow design, recycle, reuse, redesign, and new eco-models. Firstly, brands of 'community and fair trade' manufactured products through fair trade and local community's artisan by ethical practices with organic fabrics. Secondly, brands of 'ecological and slow design' pursued timeless design and multi-functional design as luxury eco-fashion styles. They used organic textiles, hemp, bamboo, soya, tencell, sea cell, and self-sustaining plants. Thirdly, brands of 'recycle, reuse, redesign' aimed for upcycling high-end fashion and used vintage clothes, textile scraps, PET, parachutes, tires, safety belts, advertising banner and so on. In addition, brands of 'new models as eco-fashion' suggested zero-waste cutting, recycling over-printing technology, new sustainable business model, and ethical practices in the supply chain of the fashion industry.

• 한국항공우주학회지
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• 제49권1호
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• pp.53-61
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• 2021

본 논문은 고온 환경의 화력발전소 보일러 내부 점검용 드론 개발을 위한 선행연구로 AirSim을 이용한 고온 환경에서의 시뮬레이션을 통해 드론이 정상적인 비행이 가능한지 검증 하였다. 고온의 비행 환경에서는 공기 밀도, 점성계수 등이 상온과 달라 공력특성이 달라지며 이에 따라 드론의 비행성능 또한 달라진다. 따라서 온도 변화에 따른 프로펠러의 공력 특성의 변화를 확인하기 위해 JBLADE를 통한 프로펠러 해석과 추력 테스트, 전기추진계통 성능예측모델을 통한 동작특성예측을 수행하였다. 그리고 해석 및 성능예측 결과를 AirSim에 적용해 시뮬레이션을 진행하고 결과 분석을 통해 기체 재설계를 진행하였다. 재설계 결과 80℃의 환경에서 호버링 시 필요한 추력을 얻기 위해 재설계 전 최대 출력의 약 65% 사용하던 것이 52%로 감소함을 확인하였다.

• 간호행정학회지
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• 제14권2호
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• pp.107-117
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• 2008

Purpose: The aim of this study was to testify effectiveness and adaptability of the job characteristics model in nursing organization. Methods: The subjects of this study were 250 nurses who were working in the 2 general hospitals located in Metropolitan city area. The data were collected by self-reporting questionnaires. The data were analyzed using descriptive statistics and path analysis. Results: The modified path model revealed a highly fitness of the data in the overall fitness indexes. The prediction power of modified model was from 44% to 58%, which was very high. The highest predict factors of organizational commitment were identified meaning of empowerment and feedback of job characteristics. The highest predict factors of job satisfaction were identified impact of empowerment and autonomy of job characteristics. Conclusion: With these findings, it was suggested that the nursing job-redesign plan focused on nursing feedback and autonomy among the job characteristics was needed to increase the nurse’ empowerment as well as nursing organizational effectiveness.

• 한국소음진동공학회논문집
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• 제18권10호
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• pp.1014-1023
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• 2008

Subway electric trains need to be faster for accommodation of long distance passengers. The faster run of the existing trains results in deterioration of ride quality due to noise and vibration. To reduce the noise and vibration of the electric train, a running test of the electric train was performed and an ADAMS/Rail model was set up to verify the running test results. The experimental results show that the sources of the cabin noise and vibration basically comes from the irregularity of the railroad track and the deterioration of the connection part between cabin and bogie. Consequently for mitigation of noise and vibration of the electric train, the redesign of the center pivot with softer stiffness and the minimization of rail irregularity are necessary. the frequent maintenance of the train will lead to better comport.