• 설비공학논문집
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• 제21권2호
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• pp.103-108
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• 2009

Local exhaust system used in toilet and cooking place of low-rise public house installed roof ventilator at terminal of stack. There are many high riser public houses in Korea. These buildings were not viewed as being major contributors to exhaust pollutants producted in indoor. It was because many engineers thought that exhaust in high riser public house depends on stack effect. But Neutral pressure level represents in a terminal of stack with air tightness for the best exhaust efficiency. Thereby, lower floors have the worst indoor air quality. This paper focuses mainly on the exhaust efficiency improved by roof fan with motor installed in high riser public house. It is observed there is higher exhaust efficiency than the existing natural roof ventilator.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.1741-1746
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• 2000

Recently the impact sound insulation performance is regarded as one of the most important factor in determining the quality of apartment house. So many studies were carried out to improve these performance and to propose an appropriate evaluation method and standard of floor impact sound insulation for apartment house by psycho-acoustic method in the laboratory. This study was carried out the field psycho-acoustic test to find a correlation between physically measured values and psychological response in apartment house, and the results will be used to establish the appropriate evaluation method and standard of floor impact sound insulation.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2004년도 품질경영모델을 통한 가치 창출
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• pp.490-495
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• 2004

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2006년도 춘계학술대회
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• pp.423-427
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• 2006

품질의 집(HoQ, House of Qualify) 모형은 1960년대 후반에 개발된 이래, 거의 모든 제조업에 적용되어 왔으며, 이제는 서비스업에서도 HoQ 모형을 응용하여 서비스를 개발하거나 서비스전달과정을 개선하는 경우가 많다. 그러나 50년에 가까운 역사를 가짐에도 불구하고, HoQ 모형을 수리적 관점에서 엄밀하게 분석하여 그 이론적 기초를 공고하게 다지는 연구는 매우 드물다. 본 연구에서는 TQM이나 6-시그마 프레임워크의 핵심적 도구로 등장하는 HoQ 모형을 선형대수학(linear algebra)적 관점에서 해석하고 분석하여, 방법론으로서의 가치를 재조명한다. 이러한 접근을 통하여 HoQ 모형이 품질경영에 기여하는 바와 함의 및 한계점 등을 명확히 밝혀, 모형의 올바른 활용을 유도할 수 있다.

• 품질경영학회지
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• 제46권4호
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• pp.821-842
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• 2018

Purpose: To derive key requirements and key technologies for weapon system acquisition business by using Qualify Function Deployment (QFD), and to reduce business cost by setting the target performance and key expense of weapon system. Methods: We propose a QFD methodology that can induce rational decision-making by translating analyst's subjective opinions into quantitative values when analyzing requirements at the initial stage of weapon system development project. Based on QFD methodology, QFD application model combining house of quality, value engineering, and analogy cost estimating technique is presented. Results: It was possible to analyze the specific requirements necessary for the development of the weapon system, to solve the communication problem of the participants, to set clear development direction and target. Conclusion: By applying the QFD application model at the early stage of the weapon system acquisition project, it is possible to reduce the business cost by establishing clear development direction and goal through the procedural analysis process.

• 한국주거학회논문집
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• 제3권2호
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• pp.75-88
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• 1992

The purpose of this study is to analyze the relations between the conditions of the flaws and the types of damage according to the characteristics of housing, and then to provide with some basic data for the construction of houses of good quality. The effective analytic data for this research are 558 of all 700 questionnaires gathered through distribution collection and personal interviews conducted from June 22, 1992 Through to July 6, towards the first occupants in apartment houses, tenement houses, multidetached houses, multifamily houses and detached houses that last 10 years after construction, located in Seoul and Kyungki-Do. Our major findings are as under:1) Our data reveal that the ratio of flaw occurrence by general type breaks down into noise 53.7%, crack 39.3%, dew condensation 36.9%, windows and doors 36.6%, structure and frame 35.3%, built-in materials 33.3%, the inferiority of equipments/facilities 29.0%, ill drainage 22.0%, and the leakage of water 19.3% average number of flaw occurrence, multi detached house is the highest as 13.7, apartment house 10.5, tenement house 10.5, detached house 10.51 and multifamily house 8.7.3) As regards the degree of flaw occurrence, the flaw of noise is as serious in the degree of occurence as it is high in the ratio of occurrence. Particularly, the following contrastive phenomena are found: multidetached house is normal (2.0) in the degree of occurrence but it is high in the ratio of occurrence: while multifamily house is 2.9 in the degree of occurrence but it is low in the ratio of occurrence.4) In view of the relations between the types of flaws and those of damage, the flaw type which significantly influences on the injury of spirit and health is built-in materials; the flaw types that have considerable effect on the damage of house and home life are the inferiority of equipments/facilities, due condensation, and inferior windows and doors; and the flaw types that have a bad influence over the reliance on the constructors are the inferiority of equipments/facilities, due condensation and built-in materials.

• 한국토양비료학회지
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• 제36권1호
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• pp.16-23
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• 2003

낙동강 유역 농업지대에서 영농활동에 따른 토양과 수질을 평가하기 위하여 전형적인 논과 밭농사를 중심으로 한 영주 고령 밀양지역, 과수원이 형성되어 있는 임고천 유역, 그리고 시설 재배지인 하빈천 유역을 대상으로 1995년 7월부터 1999년 7월까지 각 소하천 주변의 토양과 수질을 조사하였다. 영농형태에 따라 토양중 유효인산의 함량은 현저한 차이가 있었는데, 밭토양과 시설재배지 토양이 다른 토양에 비하여 월등히 높았고, 총질소 함량은 과수원 토얌이 약간 높았을 뿐 대부분의 토양이 비슷한 수준이었다. 소하천변로 수질을 평가해 보면, 다른 유역에 비하여 논농사 유역의 수질이 양호하였으나, 과수원이 형성되어 있는 임고천의 경우 질소의 함량이 높았으며, 시설재배지인 하빈천의 경우에는 상대적으로 염류의 함량이 높았다. 이는 유역내 축산폐수나 생활하수의 유입, 농경지의 과다한 화학비료와 퇴비의 시용으로 생각되며, 낙동강의 수질 본전을 위해 이들 소하천에 대한 농업비점오염원에 대한 적절한 토양 및 수질관리가 선행 할 것 이다.

• 설비공학논문집
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• 제24권2호
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• pp.174-182
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• 2012

In previous research, most occupant said that they have not operated ventilation system installed in the house, because of increasing of energy consumption and unconcern of ventilation. Therefore, it is necessary to applied the sensor based demand controlled ventilation for the IAQ(Indoor Air Quality) and improvement of energy efficiency in ventilation strategy. The propose of this study is to present a application method of IR(Infrared) sensor for multi-zone DCV(Demand Controlled Ventilation) in the apartment house. It is possible that IR sensor could be used for DCV, because that could detect the occupant and action. IR sensor based DCV strategies are established to evaluate characteristic of application in the apartment house and simulated by Contam program. As a result, they have some week points though, if they would be applied DCV with optimum strategy, it would be useful to improve IAQ, to reduce energy consumption.

• 환경위생공학
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• 제16권1호
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• pp.1-8
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• 2001

Since most people spend over 80% of their time indoor, indoor air quality tends to be the dominant contributor to personal exposure. In this study, indoor and outdoor $NO_2$concentrations were measured and compared with simultaneously personal exposures of 27 house-wives and female workers of kindergarten. Time activity pattern and house characteristics were used to determine the effects of these factors on personal exposure. Since house-wives student spent most their times in indoor with mean of 89.8%, their $NO_2$ exposure was associated with indoor $NO_2$ level(r= 0.92) rather than outdoor $NO_2$ level(r= 0.87). female workers were also associated with indoor $NO_2$ level(r= 0.70) though sample number were small. Using time-weighted average model, $NO_2$ exposures of house-wives were estimated by $NO_2$ measurements in indoor home and outdoor home levels. Estimated $NO_2$ personal exposures were significantly correlated with measured $NO_2$ personal exposures (r= 0.90). These results might mean that air pollutants exposure of old and feeble persons, and infants could be estimated by measuring concentrations of indoor home.

• 한국주거학회논문집
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• 제19권4호
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• pp.11-20
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• 2008

The purpose of this study is to gather baseline data on perceived housing values and satisfaction rates among consumers with the aim of using this information for future planning. Self-administered questionnaires were provided to 1000 university students from Gwangju and the Chonnam area from 2007 October 8th to 30th. The collected data was used to conduct comparative and descriptive statistical analysis: factor analysis, cluster analysis, t-test, $x^2-test$ and one-way ANOVA. The main findings are as follows: Firstly, in relation to perceived house values, students identified three factors as important: pursuit of convenience, disposition toward individuality-orientation and consciousness of others. The respondents regarded convenience as very important, especially in regard to one's safety, health and location of amenities. Secondly, cluster analysis based on perceived house value revealed passive and energetic types. Students in the energetic type exhibited a tendency to prefer convenience, independence, and consciousness of others. Finally in terms of housing satisfaction, the respondents identified four factors as important: house quality, neighborhood environment, local socio-psychological environment, and location. Housing satisfaction was higher among students who lived in large or new houses, shared the same house with their family, and had a room all to themselves. Accoding to these findings, university students important value safety, health and environmental-friendliness in a house and they find location important. Therefore, future houses should reflect these wants.