• 한국환경과학회지
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• 제15권8호
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• pp.719-725
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• 2006

Since low-floor apartments ate vertically closer to patting lots and roadways, it is hypothesized that residents in low-floor apartments may be exposed to elevated ambient levels of motet vehicle emissions compared to residents in high-floor apartments. The present study examined this hypothesis by measuring two motor vehicle source-related pollutants(CO and PM10) in ambient air of high-rise apartment buildings within the boundary of industrial complexes according to atmospheric stability The ambient air concentrations of CO and PM10 were higher for low-floor apartments than for high-floor apartments, regardless of atmospheric stability, The median concentration ratio of the low-floor air to high-floor alt ranged from 1.3 to 2.0, depending upon atmospheric stabilities, seasons and compounds. Moreover, the CO and PM10 concentrations were significantly higher in the winter and in the summer, regardless of the Hoot height. Atmospheric stability also was suggested to be important for the residents' exposure of high-rise apartment buildings to both CO and PM10. The median ratios of surface inversion air to non-surface inversion air ranged from 1.2 to 1.7 and from 1.0 to 1.6 lot PM10 and CO, respectively, depending upon seasons. Conclusively, these parameters(apartment floor height, season, and atmospheric stability) should be considered when evaluating the exposure of residents, living in high-rise apartment buildings, to CO and PM10. Meanwhile, the median PMl0 outdoor concentrations were close to or higher than the Korean annual standards for PM10, and the maximum PM10 concentrations substantially exceeded the Korean PM10 standard, thus suggesting the need for a management strategy for ambient PM 10. Neither the median nor the maximum outdoor CO concentrations, however, were higher than the Korean CO standard.

• Safety and Health at Work
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• 제9권1호
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• pp.17-24
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• 2018

Background: Increasing the slip resistance of floor surfaces would be desirable, but there is a lack of evidence on whether traction properties are linearly correlated with the topographic features of the floor surfaces or what scales of surface roughness are required to effectively control the slipperiness of floors. Objective: This study expands on earlier findings on the effects of floor surface finishes against slip resistance performance and determines the operative ranges of floor surface roughness for optimal slip resistance controls under different risk levels of walking environments. Methods: Dynamic friction tests were conducted among three shoes and nine floor specimens under wet and oily environments and compared with a soapy environment. Results: The test results showed the significant effects of floor surface roughness on slip resistance performance against all the lubricated environments. Compared with the floor-type effect, the shoe-type effect on slip resistance performance was insignificant against the highly polluted environments. The study outcomes also indicated that the oily environment required rougher surface finishes than the wet and soapy ones in their lower boundary ranges of floor surface roughness. Conclusion: The results of this study with previous findings confirm that floor surface finishes require different levels of surface coarseness for different types of environmental conditions to effectively manage slippery walking environments. Collected data on operative ranges of floor surface roughness seem to be a valuable tool to develop practical design information and standards for floor surface finishes to efficiently prevent pedestrian fall incidents.

• 산업경영시스템학회지
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• 제21권46호
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• pp.197-206
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• 1998

In recent years there has been a tremendous upsurge of interest in Shop Floor Control System (SFCS) design and analysis. We reviewed current computer-aided shop floor control system. It is concluded that current methodologies support, in a very restricted sense, these planning, scheduling, and monitoring activities and that enhanced performance can be achieved via an integrated approach. In this paper we present an interdisciplinary approach to the development and installing of sophisticated shop floor control systems. Interdisciplinary design will form the basis of designing SFCS in new knowledge intensive era. Interdisciplinary design means more than just applying knowledge from other domains, such as psychology and organization science to design of SFCS. The interdisciplinary approach is verified by an illustrative case study.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
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• pp.619-622
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• 1996

This paper presents the formal integration of process planning and shop floor control with Petri net formalism. Formal integration means that both planning and control problems can be modeled, interfaced, and transformed with the Petri net formalism. This integrated framework provides a systematic approach for rapidly developing a formal shop floor controller from process planning with respect to shop floor configuration.

• 한국소음진동공학회논문집
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• 제27권1호
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• pp.5-13
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• 2017

Noise complaints among neighbors in apartment building are mainly caused by floor impact noise that is structure born noise due to occupant induced floor vibration. To control this noise problems many researchers have investigated floor systems and finishing materials. Light-weight impact noise affects by finishing materials, but heavy-weight impact noise induced by heel impacts during normal walking or jumping of children is concerned with structural system and floor vibration. To figure out the characteristics of floor impact noise and transmission of floor vibration due to human activities, vibration tests were conducted in apartment buildings. Impact hammer, heel drop and walking activities were loaded at center of upstairs living room, and accelerations of slabs for both upstairs and downstairs and sound pressure levels for downstairs were measured. The acceleration ratio of transmitted floor vibration to downstairs and human induced vibration in upstairs was between 0.5 and 1.0 according to slab size, wall, and load type. And floor impact noise occurred in the range of natural frequency of slab.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.1480-1484
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• 2004

In this paper, a self-propulsive and small concrete floor finishing trowel robot with twin trowels is proposed. Due to the small size and omni-directional moving capability, it is adequate for small space such as apartment. By adjusting the posture of trowels, it can move in any direction without wheels. We used cheap PIC processor for the cost saving design of the modules and adopted mode processors for easy operation of control stick. For the position control of the robot, we made a motion control algorithm appealing to the stepping motor driver module and the wireless communication module between the robot and PC (or control stick). In this paper, we discuss the control problem of the floor finishing robot in order to move to the right position. By comparing experimental result with simulation, we show the validity of the robot mechanism, sensors, and the control system.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1995년도 춘계공동학술대회논문집; 전남대학교; 28-29 Apr. 1995
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• pp.193-200
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• 1995

A shop floor control system(SFCS), a central part of agile manufacturing, performs the production activities required to fill orders. In order to effectively control these activities, CSCW (computer supported cooperative work) is adopted where a supervisor does not exist. In this paper, we define functional perspective of CSCW-based shop floor control using planning, scheduling, and execution functions. In particular, we focus on an execution model that can coordinate the planning and scheduling functions. Execution can be defined informally as a function that downloads and performs a set of scheduled tasks. Execution is also responsible for identifying and resolving various errors whether they come from hardware or software. The purpose of this research is to identify all the execution activities and solving techniques under the assumptions of CSCW-based heterarchical control architecture. This paper also proposes a classification scheme for execution activities of CSCW-based heterarchical control architecture. Petri-nets are used as a unified framework for modeling and controlling execution activities. For solving the nonexistence of a supervisor, A negotiation-based solution technique is utilized.

• 설비공학논문집
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• 제26권7호
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• pp.335-342
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• 2014

The big issue in fire and life safety protection in atriums is that hot smoke can spread vertically via the atrium openings, and impact atrium floors remote from the fire. Three different strategies to provide fire and life safety protection for atrium space were evaluated in this study, using the FDS model. Strategy A is the atrium protection approach addressed in the Korean Building Fire Protection Code, where atria are required to be enclosed with fire shutters from the $2^{nd}$ floor to the atrium top, and the ground floor is allowed to open to the atrium; in this case, no smoke control is required. Strategy B is the atrium protection approach, with smoke control provided in accordance with NFPA 92B; in this case, no atrium floor is enclosed. Strategy C is the atrium protection approach, in which some of the upper atrium floors are enclosed (the case of the top atrium floor being enclosed is evaluated in this study), and atrium smoke control is also provided to protect the lower atrium floors.

• 한국산학기술학회논문지
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• 제20권8호
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• pp.271-278
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• 2019

본 연구는 현대의 대표적인 주거양식인 아파트 공간과 우리 전통미를 살린 한옥표준평면도의 공간 배치 등을 비교 분석한 것이다. 연구 방법은 객관적인 분석을 위하여 공간구문론(Space Syntax)을 이용하여 각공간의 특성을 분석하였다. 연구결과는 다음과 같다. 1) 아파트 공간은 생활의 편리함과 용도의 명확한 구분 때문인지 공간이 세분화된 반면에 전통한옥 평면은 각 실이 다양한 용도로 사용함에 따라 아파트보다 각 실의 공간이 세분되지 않았다. 2)한옥평면도에서 대청이 거실로 변화하였을 뿐 두 평면도 모두 시대의 변화에도 불구하고 거실공간이 통합도가 가장 높았다. 3)한옥공간은 서로 공간이 통하는 통합성 성격이 강하지만 현대화된 한옥표준설계도는 분격성 공간의 성격이 강한 것으로 분석되었다. 4)일반적인 생각과 달리 아파트에서 안방의 통합성이 높았고 한옥평면도에서는 침실과 안방은 분격성이 높았다. 5)한옥평면도에서는 옛날과 달리 툇마루의 기능이 많이 감소한 반면에 사랑방에 부속된 누마루가 분격성 공간으로 분류되었다. 아파트에서는 피난공간이 분격성이 가장 높은 것으로 분석되었다. 즉 한옥표준설계도는 현대의 생활에 적응하면서 변화되어 있었다.

• 한국산업정보학회논문지
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• 제19권4호
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• pp.65-72
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• 2014

제조기업의 생산성을 높이기 위해서는 생산현장에서 발생하는 다양한 손실에 대한 분석 및 개선이 필요하다. 본 논문에서는 비가동 손실 분석을 위하여 기존에 구축한 생산현장 정보 수집 시스템을 활용한 설비/공정의 비가동 시간 수집 및 분석에 대하여 소개한다. 비가동 시간, 원인을 수집하기 위하여 생산현장 모니터링 정보, 사용자 등록 비가동 이벤트, 설비 고장진단 알고리듬, 작업자 입력을 활용하였다. 또한 수집된 비가동 시간의 분석을 수행하기 위한 웹 기반의 사용자 인터페이스를 개발하였다. 부품가공기업의 시범 적용을 통하여 시스템의 유용성을 확인하였다.