• 상하수도학회지
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• 제28권1호
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• pp.125-134
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• 2014

6 sigma is a management innovation strategy which improves most of all managerial processes including transactional and project based operations such as marketing, purchasing, accounting, and construction. Even though 6 sigma is trying to solve problems from the customer's viewpoint in the scientific manner, project leader feels some difficulties in implementation because of several reasons. Especially the difficulties are prevalent in construction site. This paper investigates the cause of the difficulties through questionnaires, analyzes the investigation results, and verifies the critical success factors of 6 sigma implementation. Factor analysis has been usually employed in reducing quantity of data and summarizing information chaos. In this study, several variables from questionnaires are grouped into just only four factors by the process of factor analysis. The critical success factors are extracted as project management system, implementation mechanism, site condition, and project ownership. Some ideas for each individual success factor are suggested, which are expected to be useful in successful implementation of 6 Sigma in construction site.

• 한국디지털정책학회:학술대회논문집
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• 한국디지털정책학회 2005년도 추계학술대회
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• pp.447-463
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• 2005

The purposes of this study is to investigate the factor structure of web-site characteristics and antecedents factors affected to trust, satisfaction and behavioral intention of web-site. Refined data were consisted of 4 internet shopping mall survey and estimated the perception to visiting web site. Statistical methods are adapted Frequency, Factor Analysis and CFA(Confirmatory Factor Analysis) of LISREL. 8 program. Research findings are as follows. The factors of web characteristics indicated to product information/buying procedure clarification, stability and function of system, usability of web site, security and protection of individual information, design, clarification of enterpriser information, various payment methods and customer service. In regression analysis, dependent variables were trust, satisfaction and behavioral intention. reputation of site were significantly effected variables. External variables consisted of the 4 characteristics of web-site and reputation and trust, satisfaction and behavioral intention were internal factor.

• 정보통신설비학회논문지
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• 제2권1호
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• pp.78-87
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• 2003

One of the most difficult and important problems associated with radiated electromagnetic emissions from digital devices are the determination of antenna factor and site acceptability of an open area test site. This paper presents the problems of the open area test site and EMC antennas far measuring electromagnetic interferences radiated from the equipements. It seems desirable that the antenna factor of EMC antennas be revised to the antenna factor with zero reflection presented in this paper for accurate measurements.

• 한국지진공학회논문집
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• 제8권4호
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• pp.11-20
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• 2004

반응수정계수의 핵심구성요소인 연성계수를 토질조건에 따라 제시하였다. 47개의 지진에서 얻어진 총 1,860개의 지진기록이 사용되었으며, 지반 전단파의 평균속도에 따라 4가지의 토질조건을 고려하였다. 이러한 분류는 현재 사용되고 있는 UBC(1997), NEHRP(1997) 및 IBC 200(1997)의 토질조건과 일치한다. 통계적 회귀분석으로부터, 토질조건에 따른 연성계수를 평가하기 위한 단순화된 식이 제안되었다. 제안된 식은 상대적으로 간단하면서도 평균연성계수와 잘 일치하는 결과를 보였다. 제안된 식에 근거하여, 현재의 기준과 일치하는 토질조건에 따른 연성계수를 평가할 수 있을 것으로 기대한다

• Nuclear Engineering and Technology
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• 제14권1호
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• pp.17-21
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• 1982

본 논문에서는 원자력발전소 부지의 안전성 평가 방법으로서 부지의 인구를 평가하는 USNRC의 SPF를 보다 발전시켜 정상 가동시나 사고시 방출되는 방사성 물질이 대기에로의 확산으로 인하여 주거 인구가 받는 영향을 고려하여 SPMF를 정의하고 고리 부지에 대한 SPF와 SPMF를 비교함으로써 SPMF모델의 타당성을 검토했다. 아울러 미국 주요 발전소와 국내 발전소 부지의 SPF를 비교하여 국내발전소 부지의 상대적 안전성을 평가했다.

• KIEAE Journal
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• 제10권5호
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• pp.71-76
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• 2010

Recently, the construction and plan of super-tall building is attention link of new town development or urban core regeneration. Super-tall Buildings have many advantages and a lot of affects in urban contexts. Also, construction of super-tall building is will be able to social problem like urban core's decline, loss of openspace, incompatible urban scape, traffic congestion of urban core. But, compares to super-tall buildings affects in urban contexts, there was not extra ordinary study about super-tall building by the urban scale approaches. Therefore, need about study materplan planning of the site which is made to meet super-tall building and urban contexts. There are two main processes in this study. First, to analyze the factors affect to masterplan planning of the super-tall building's site. Through the analyzed factors, classify type of super-tall buildings and identify the type's state. Second, to classify and set the elements of masterplan planning factor in the site. Identify the masterplan planning factor's state by deployment materplan planning factor set the current applied to the constructed super-tall buildings. Through this process, identified the recent trend and providied the basic elements of materplan planning of super-tall building's site.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
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• pp.293-296
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• 2004

The objective of this study was to decide the designing factor for remediaton of the contaminated site. The soil and ground-water samples were analyzed and hydro- geological characteristics was assayed for the survey of pollution level. Also air-permeability test and MPN(most probable number) test were conducted for selecting the designing factor. The contaminants were mainly found in north-west part of the site and were expected to move toward the south. Ex-situ technology was expected more useful than in-situ one with the results of air-permeability test saying that air permeability was relatively low. Additional microbes were expected for remediation efficiency because residual microbes were loosely populated. The choosing of the designing factor was requisite for remediation of contaminated site.

• 디자인학연구
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• 제19권1호
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• pp.273-282
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• 2006

본 연구는 수량에 의한 수면폭의 변화로 인한 하천경관의 시각적 선호도에 미치는 선호요인을 파악하기 위하여 '주변 환경이 일정할 때 수량에 의한 수면폭은 어떠한 요인에 의해 선호되어지는가?'에 대한 연구의문에서 출발하여 금강경관의 수면폭에 미치는 선호요인을 구명하였다. 1) 수면폭 변화에 따른 금강경관의 시각적 선호요인 변수는 먼저 갑천의 경우 감정적 인자, 물리적 특성 인자, 심미성 인자, 개성적 인자 4개의 변수, 무주의 경우 감정적 인자, 물리적 특성 인자 2개 변수로서 모두 유의성이 있는 것으로 판명되었다. 모든 선호요인의 값이 증가함에 따라 시각적 선호의 값도 증가를 가져오곤 그 반대의 경우도 마찬가지였다. 2) 다중회귀모형에서 다른 조건이 불변일 경우, 갑천, 무주 모두 감정적 인자의 값이 증가할 때 전체적인 시각적 선호에 가장 크게 영향을 미치고, 다음으로 물리적 특성 인자가 두 번째로 영향을 미치는 것으로 판명되었다. 선호요인이 시각적 선호에 기여하는 상대적 중요도는 갑천의 경우 감정적인자, 물리적 특성 인자, 심미성 인자, 개성적 인자 순으로 나타났으며, 감정적 인자는 개성적 인자에 비해 4.3배만큼 중요도가 큰 것으로 나타났다. 무주의 경우 감정적 인자, 물리적 특성 인자 순으로 나타났으며 감정적 인자는 물리적 특성 인자 비해 1.1배만큼 중요도가 큰 것으로 나타났다. 따라서 두 장소 모두 감정적 인자가 가장 중요한 선호요인으로 판명되었다. 수면폭 변화에 따른 금강경관의 시각적 평가에 의한 요인분석 결과는 하천의 수면 폭 및 수량에 큰 영향을 미칠 것이다.

• Earthquakes and Structures
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• 제25권5호
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• pp.325-342
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• 2023

The damping modification factor (DMF) is used to modify the 5%-damped response spectrum to produce spectral values that correspond to other necessary damping ratios for seismic design. The DMF has been the subject of numerous studies, and it has been discovered that seismological parameters like magnitude and distance can have an impact on it. However, DMF formulations incorporating these seismological parameters cannot be directly applied to seismic design because these parameters are not specified in the present seismic codes. The goal of this study is to develop a formulation for the DMF that can be directly applied in seismic design and that takes the effects of magnitude, distance, and site conditions into account. To achieve this goal, 16660 ground motions with magnitudes ranging from 4 to 9 and epicentral distances ranging from 10 to 200 km are used to systematically study the effects of magnitude, distance, and site conditions on the DMF. Furthermore, according to the knowledge that magnitude and distance affect the DMF primarily by changing the spectral shape, a spectral shape factor is adopted to reflect influences of magnitude and distance, and a new formulation for the DMF incorporating the spectral shape factor is developed. In comparison to the current formulations, the proposed formulation provides a more accurate prediction of the DMF and can be employed directly in seismic design.

• Earthquakes and Structures
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• 제13권1호
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• pp.79-87
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• 2017

Seismic analysis of local site conditions is fundamental for a reliable site seismic hazard assessment. It plays a major role in mitigation of seismic damage potential through the prediction of surface ground motion in terms of amplitude, frequency content and duration. Such analysis requires the determination of the transfer function, which is a simple tool for characterizing a soil profile by estimating its vibration frequencies and its amplification potential. In this study, numerical simulations are carried out and are then combined with a statistical study to allow the characterization of design sites classified by the Algerian Building Seismic Code (RPA99, ver 2003), by average transfer functions. The mean transfer functions are thereafter used to compute RPA99 average site factors. In this regard, coming up seismic fields are simulated based on Power Spectral Density Functions (PSDF) defined at the rock basement. Results are also used to compute average site factor where, actual and synthetic time histories are introduced. In absence of measurement data, it is found that the proposed approach can be used for a better soil characterization.