• 한국대기환경학회지
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• 제15권4호
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• pp.485-493
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• 1999

This paper presents the results of the first interlaboratory comparison of ambient particles measurement conducted by 5 laboratories under the framework of Korean Society for Atmospheric Environment(KOSAE) on the May of 1998 in Seoul. Collection of particles less than 10$mu extrm{m}$(PM10) was carried out by two different types of PM10 sampler, and their concentration reported by three laboratories ranged from 36.2~56.05$\mu\textrm{g}$/㎥. Analyses of chemical composition of particles collected by each lab were performed by the destructive and nondestructive instrumental methods. Statistical analysis of the measurement results could not be carried out because a comprehensive QA/QC had not been applied before experiment. The importance of QA/QC as well as the performance of QA/QC for the measurement of PM10 was discussed in detail.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.521-524
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• 2003

최근 현장에서는 공사관리의 효율화를 위한 여러 가지 공사관리 시스템을 적용하고 있으며, 이를 통하여 현장의 실적자료를 수집하고 있다. 하지만 이러한 노력에도 불구하고 실적자료의 바탕이 되는 현장 데이터는 객관적 수집 또는 기준에 의해서 이루어지는 것이 아니라 주관적 판단 또는 측정자별로 상이한 기준에 의해 이루어져 각 현장별로 큰 차이가 발생하고 있다. 이러한 문제를 해결하고자 최근 모바일 기술의 발전을 활용한 현장의 데이터 수집을 위한 여러 가지 방안이 연구되고 있으며, 데이터의 체계화에 대한 필요성이 제기되고 있다. 따라서 본 연구는 공종별 특성에 따른 진도 측정 단위 도출 방안을 제안하고, MS Access를 활용한 Prototype의 진도 측정단위 생성 시스템을 개발하였다. 마지막으로, 제안된 도출 방안과 시스템 및 체계는 측정된 데이터의 객관성 및 정확성을 높임으로서, 현장별로 표준화된 진도측정을 가능하게 할 것이다.

• 한국건설관리학회논문집
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• 제18권3호
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• pp.42-51
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• 2017

건설 프로젝트의 생산과정에서 성과를 지속적으로 측정하고 평가하는 것은 프로젝트관리의 성공적인 수행을 위한 핵심요소이다. 성과는 일반적으로 목적물에 할당 된 공정과 원가 관련 정보를 정량적으로 평가함으로써 측정되며, 객관적인 성과측정을 위해 공정과 원가가 통합적으로 계획 관리되어야 한다. 본 연구는 공정과 원가의 통합 모델을 통해 성과 측정 방법론을 제안하고 진도관리의 기반을 마련하는데 목적이 있다. 이를 위해 공정계획과 원가계획의 표준화된 업무 프로세스를 개발하였고, EVM과 기존의 통합 모델을 분석하여, 성과측정 유닛을 활용한 WBS와 CBS의 통합 방법론을 제시하였다. 플랜트 프로젝트의 시공단계를 중심으로 공통 성과측정의 대상은 공종으로 선정하여 성과측정 유닛을 규정하고 공정과 비용정보를 연계시켜 성과비율을 산정하였다. 또한 리소스의 적용시 원가요소 중 소모성자원의 비용을 배제하여 진도측정의 객관성을 향상하였다. 본 결과는 실제 플랜트 사례 프로젝트에 적용하여 실증되었으며, 개발된 방법론은 향후 프로젝트의 성과를 보다 객관적인 기준으로 평가할 수 있어 보다 효과적인 진도관리 방법이 될 것으로 판단된다.

• 경영과정보연구
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• 제38권2호
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• pp.209-223
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• 2019

본 연구는 소셜네트워크에서 SNS 광고에 대한 구전 제약요인의 개념과 측정도구 개발을 통하여 온라인 구전을 활성화하는데 그 목적이 있다. 이런 연구 목적을 달성하기 위해 3단계의 연구를 수행하였다. 첫째, 문헌고찰과 정성적 조사방법을 통하여 구전 제약에 대한 개념과 범위에 대하여 탐색적 조사(표적 집단 면접과 심층면접, 전문가 면접)를 실시하였다. 둘째, 개발된 측정항목은 정제작업을 위해 설문 조사를 실시하여 측정문항에 대한 신뢰성과 타당성 검증을 하였다. 셋째, 개발된 측정문항과 다른 주요 구성개념과 관계를 살펴봄으로써 측정항목의 예측타당성을 검증하였다. 연구결과 6개의 구성요인과 이에 대한 총 23개의 측정문항이 도출되었으며, 각각 내재적 및 대인적 제약(심리적 민감성, 보상적 민감성, 타인평가 민감성), 구조적 제약(신뢰성, 정보성, 오락성)으로 명명하였다. 정성적 연구와 정량적 연구를 통해 구전 제약의 측정문항을 개발하였으며, SNS 성과 및 평가 측면에서 SNS 광고 구전의 제약요인으로 작용하고 있는 사회적, 심리적, 환경적인 방해 요인들을 구전 제약의 관점에서 통합적으로 살펴보았다. 본 연구를 통해 온라인 구전 제약에 대한 체계적이고 실증적인 연구수행을 위한 기본 틀과 효과적인 SNS 구전을 이끌어 낼 수 있을 것이다.

• IEIE Transactions on Smart Processing and Computing
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• 제1권2호
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• pp.106-116
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• 2012

The huge success of location-aware applications has called for the rapid development of an alternative positioning system to the global positioning system (GPS) for indoor localization based on existing technologies, such as 802.11 wireless networks. This paper proposes the Wireless MAC Processor Positioning System (WMPS), which is a localization system running on off-the-shelf 802.11 Access Points and based on the time-of-flight ranging of users' standard terminals. This paper proves through extensive experiments that the propagation delays can be measured with the accuracy required by indoor applications despite the different noise components that can affect the result: latencies of the hardware transreceivers, multipath, ACK jitters and timer quantization. Key to this solution is the choice of the Wireless MAC Processor architecture, which enables a straightforward implementation of the ranging subsystem directly inside the commercial cards without affecting the basic DCF channel access algorithm. In addition to the proposed measurement framework, this study developed a simple and effective localization algorithm that can work without requiring any preliminary calibration or device characterization. Finally, the architecture allows the measurement methodology to be adjusted as a function of the network load or propagation environments at the run time, without requiring any firmware update.

• Smart Structures and Systems
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• 제21권6호
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• pp.741-749
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• 2018

Structural health monitoring (SHM) systems are necessary to achieve smart predictive maintenance and repair planning as well as they lead to a safe operation of mechanical structures. In the context of vibration-based SHM the measured structural responses are employed to draw conclusions about the structural integrity. This usually leads to a mathematically illposed inverse problem which needs regularization. The restriction of the solution set of this inverse problem by using prior information about the damage properties is advisable to obtain meaningful solutions. Compared to the undamaged state typically only a few local stiffness changes occur while the other areas remain unchanged. This change can be described by a sparse damage parameter vector. Such a sparse vector can be identified by employing $L_1$-regularization techniques. This paper presents a novel framework for damage parameter identification by combining sparse solution techniques with an Extended Kalman Filter. In order to ensure sparsity of the damage parameter vector the measurement equation is expanded by an additional nonlinear $L_1$-minimizing observation. This fictive measurement equation accomplishes stability of the Extended Kalman Filter and leads to a sparse estimation. For verification, a proof-of-concept example on a quadratic aluminum plate is presented.

• 대한간호학회지
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• 제27권4호
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• pp.753-764
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• 1997

This study was conducted to develop a sexual satisfaction tool for married women in Korea. The data was collected from July 19 to Aug 18, 1997 by means of questionnaires developed by researchers. The subject were 417 married women living in Seoul and Pusan. The process of this study was as follows : 1) The concept of sexual satisfaction was defined. 2) A conceptual framework was identified based on the extensive review of relevant literature and interviews with married women. 3) The preliminary question items containing the attributes and elements of the concept of sexual satisfaction were listed. 4) The preliminary items were revised after a pilot study. 5) The Index of Content Validity(CVI) was calculated from the content specialists' rating. 6) The reliability and validity of the sexual satisfaction measurement tool were tested. As a result of the item and factor analysis, 17 out of 30 items were found to be valid, consequently could be used to measure sexual satisfaction for married women. These final 17 items were divided into two factors. These factors were labeled as "situation factor" (10 items) and "response factor"(7 items) according to the attributes of the clustered items. The reliability of the final 17 items was .9118. Further research is needed to confirm the reliability and validity of the tool by applying it to a group of healthy married women and to a group of married women having health-related problem.

• 정보학연구
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• 제12권2호
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• pp.13-29
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• 2009

ERP in the past, primarily centering on large enterprises and the introduction of competition in the global e-business, but along with the proliferation of small and medium-sized enterprises are now in earnest, or to take advantage of the introduction of the ERP plan. However, the introduction of the ERP cost and the effort required to develop, because many never previously introduced ERP expect that the introduction of cost and performance comparisons with the measurement is necessary. Until now, however, the introduction of a framework of analysis followed the introduction of ERP primarily to measure performance of a major improvement. This research, in addition to improving the performance of these tasks have been overlooked until now for the system's user satisfaction BSC (Balanced Scorecard) models and techniques using AHP-specific understanding of the Company (Group executives, middle managers groups, and user groups) Importance of priorities you want to analyze. In summary, the key findings of this study follows. First, ERP user satisfaction measurement for the balanced scorecard indicators in terms of the redevelopment. Second, the information system user satisfaction to the user layer (Layer 3), grouped by the measure. Thirdly, the user satisfaction of the important topics for attention as quantified by measuring the hierarchy. This model is for satisfaction levels as quantitative of future users of the new system, information systems and the introduction of a new model of development based on the evaluation data will be able to take advantage of.

• 한국경영과학회지
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• 제27권3호
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• pp.93-114
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• 2002

This paper suggests a dynamic balanced scorecard (DBSC) model employing the concept of system dynamics (SD), which could overcome the limitations inherent in the conventional balanced scorecard (BSC) and facilitate strategic learning process in organizations. The BSC has been a successful framework for measuring an organization＇s performance in various Perspectives through translating an organization＇s vision and strategy into an interrelated set of key performance indicators and specific actions. The BSC, while having significant strengths over traditional performance measurement methods, however, has its own limitations, due to its static nature, such as overlooking two-way causation between performance Indicators and neglecting the impact of delayed feedback flowing from the adoption of new strategies or policy changes. To overcome these limitations, we employs SD, a methodology for understanding complex systems where dynamic feedback among the interrelated system components significantly impact on the system outcomes. The SD simulation model in the form of DBSC we suggest in this paper would serve as a useful strategic learning tool for facilitating an organization＇s communication process through various scenario analyses as well as predicting the dynamic behavior pattern of their key performance measures over a future time frame. For the demonstration purpose, we apply the DBSC model to Korea Coal Corporation (KoCoal ) BSC case.

• 간호행정학회지
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• 제8권2호
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• pp.323-334
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• 2002

Purpose: This study was designed to analyse economical efficiency of home care service by comparing a cost-effectiveness ratio(CER) between hospitalization and home care service. Method: The analytic framework of this study was constructed in 5 stages; perspective of the analysis, measurement of costs, measurement of effects, analysis of CER, and sensitivity analysis. The SAS program was utilized for the general characteristics of the subjects, descriptive statistics, homogeneous test, normality test and difference test. Result: The results were as follows; 1) CER was 35,248,256 of ADL, 7,996,026 of nursing satisfaction, 6,144,946,000 of QALY of patients in the hospital and 11,168,863 of ADL, 2,322,239 of nursing satisfaction, 3,674,556,000 of QALY of patients in the home care center. ICER was 438,067,932 of ADL, -190,044,176 of nursing satisfaction, 8,615,336,000 of QALY. 2) In the sensitivity analysis of sex, age and discount rate, the CER of patients in the home care center was lower than the CER of patients in the hospital. Conclusion: With these findings, it affirmed that home care service had an economical efficiency compared with hospitalization in cerebrovascular disease patients. Therefore, these results will be used to develop governmental policy or expansion of the home care service.