• 산업경영시스템학회지
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• 제35권4호
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• pp.149-161
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• 2012

The current environment of technological and competitive changes influences not only the business R&D environment but also government driven national R&D strategies. Open innovation has now become an important paradigm that is replacing the outdated paradigm of closed innovation. Many companies and nations have been increasing R&D investment because R&D has been considered a driving force for national and corporate competitive advantage. The purpose of this paper is to evaluate and compare the performance of R&D focused on open innovation according to scientific and technological outputs which is based on paper publications, patents and etc. Comparisons should not be only based on the quantity but also on the quality of the output. This paper shows that it is possible to develop DEA models that utilize the Analytical Hierarchical Process in order to transform the qualitative index into a quantitative index. Hence, the relative efficiency for R&D organizations is obtained based on both quantity and quality outputs and subsequently provides comprehensive and realistic methods for decision makers to identify levels of project efficiency.

• 한국병원경영학회지
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• 제9권4호
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• pp.1-20
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• 2004

This study was aimed at examining the determinants of organizational creativity at nursing care units of university hospitals. Using some items of the Creative Nursing Practice Index(CNPI), the Nursing Work Index-Revised(NWI-R), and the Work Preference Inventory(WPI), an empirical study was conducted with a sample of 543 nurses at 49 nursing care units in two university hospitals in Korea. Data collected from the individual respondents were aggregated and transformed into the secondary data at organizational level. The data were analyzed, using Pearson correlation and hierarchical multiple regression method. The results of the study showed that organizational creativity has positive relationships to task motivation, including enjoyment and challenge to work, and work environment supporting nurses' autonomy and collaboration. Task motivation of the units and autonomous work environment explained 16.3% and 7.9% respectively in the variance of the organizational creativity. Organizational creativity was found to be significantly influenced by challenge and autonomous environment. This result implies that nursing managers should make an efforts to enhance the organizational creativity of nursing units by motivating their staff to challenge to a novel way of doing at work and making the work environment more autonomous.

• Corrosion Science and Technology
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• 제20권2호
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• pp.94-104
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• 2021

Atmospheric corrosion severity associated with aircraft parking environment was studied using metallic specimens, and temperature and humidity sensors installed at each aircraft operating base. Data were analyzed after a year of exposure. Silver was used to measure chloride deposition by integrating X-ray photoelectron spectroscopy depth profiles. Carbon steel was utilized to determine the corrosion rate by measuring the weight loss. The time of wetness was determined using temperature and humidity sensor data. Analysis of variance followed by Tukey's "honestly significant difference" test indicated that atmospheric environment inside the shelter varied significantly from that of unsheltered parking environment. The corrosion rate of unsheltered area also varies with the roof. Hierarchical clustering analysis of the measured data was used to classify air bases into groups with similar atmospheric corrosion. Bases where aircraft park at a shelter can be grouped together regardless of geographical location. Unsheltered bases located inland can also be grouped together with sheltered bases as long as the aircraft are parked under the roof. Environmental severity index was estimated using collected data and validated using the measured corrosion rate.

• Advances in aircraft and spacecraft science
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• 제6권1호
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• pp.51-67
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• 2019

AMOSC (Automatic Margin Of Safety Calculation) is a SW tool which has been developed to calculate the failure index of layered composite structures by referring to the cutting edge state-of-the-art LaRC05 criterion. The stress field is calculated by a finite element code. AMOSC allows the user to calculate the failure index also by referring to the classical Hoffman criterion (which is commonly applied in the aerospace industry). When developing the code, particular care was devoted to the computational efficiency of the code and to the automatic reporting capability. The tool implemented is an API which has been embedded into Femap Siemens SW custom tools. Then, a user friendly graphical interface has been associated to the API. A number of study-cases have been solved to validate the code and they are illustrated through this work. Moreover, for the same structure, the differences in results produced by passing from Hoffman to LaRC05 criterion have been identified and discussed. A number of additional comparisons have thus been produced between the results obtained by applying the above two criteria. Possible future developments could explore the sensitivity of the failure indexes to a more accurate stress field inputs (e.g. by employing finite elements formulated on the basis of higher order/hierarchical kinematic theories).

• 산경연구논집
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• 제13권12호
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• pp.43-57
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• 2022

Purpose: Despite the numerous studies on factors impacting pro-environmental behavior, actual studies analyzing a relationship between pro-environmental behavior and eco-friendly channels (e.g., local food market and farmers' market channel) usage behavior (visit and purchasing frequency) are rare. This study investigated the relationship between consumers with positive pro-environmental behavior and eco-friendly channels usage behavior. Research design, data and methodology: The study investigated the relationship between pro-environmental behavior and eco-friendly channels (local food markets and farmers market) visit behavior by analyzing data from the Korea Consumer Agency's 2021 Korea Consumption Life Index, with a focus on the pro-environmental index. Relationship between pro-environmental behavior and whether eco-friendly channels visit or not were analyzed. Demographic variables also influence eco-friendly oriented channels visit. Data analysis used hierarchical regression, firstly inputted pro-environmental behavior, and then demographic variables inputted, and finally pro-environmental behavior and demographics interactions as moderating variables inputted. Results: Consumer's with positive behavior towards pro-environment were indeed more likely to choose local food market and farmers' market compared to other consumers. Demographic variables also effect local food market visit. Some demographic variables moderate this relationship. The results, however, differed by channel type. Conclusions: Pro-environmental behavior is closely related to eco-friendly channels (local food market and farmers; market) visit.

• 대한원격탐사학회지
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• 제32권3호
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• pp.235-244
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• 2016

MODIS 자료를 이용한 대규모 작물 분류에는 MODIS 자료의 상대적으로 낮은 공간해상도로 인한 분광학적 혼재 양상이 두드러지게 나타난다. 이러한 분광학적 혼재를 완화하기 위하여 이 연구에서는 작물의 분광특성을 이용하여 특정 작물의 계층을 선택적으로 구분하고 상세 분류를 수행하는 선택적 계층 분류 방법론을 제안하였다. 제안 방법론에서는 특정 작물에 대한 선택적 분류를 수행함으로써 작물간의 혼재를 완화하고 구분력을 향상시킬 수 있다. 제안 방법론의 적용성 평가에는 중국 길림성의 길림시를 대상으로 MODIS 정규식생지수 자료와 근적외선 자료를 이용한 작물 분류의 사례 연구를 수행하였다. 먼저 근적외선 자료의 무감독 분류를 수행하여 벼의 재배지역을 우선적으로 추출한 후에, 시계열 정규식생지수 자료를 이용하여 벼 재배지역이 아닌 영역을 대상으로 옥수수와 콩의 상세 분류를 수행하였다. 사례 연구 결과, 제안 방법론은 유사한 분광특성을 갖는 작물의 계층을 선택적으로 구분함으로써 기존 시계열 정규식생지수 자료와 근적외선 자료를 함께 이용하는 감독 분류 결과보다 향상된 분류 정확도를 나타내었다. 따라서 신뢰성 있는 작물 구분도 제작에 제안 방법론이 효과적으로 사용될 수 있을 것으로 기대된다.

• 해양환경안전학회지
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• 제27권4호
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• pp.483-491
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• 2021

수역 내 충돌 위험 식별은 항해의 안전을 위해 중요하다. 본 연구에서는 거리 요인을 기반으로 한 군집화 방법인 계층 클러스터링을 포함하는 새로운 충돌 위험 평가 방법을 도입했으며, 주변의 선박이 많은 경우 실시간 데이터, 그룹 방법론 및 예비 평가를 사용하여 선박을 분류하고 충돌위험평가를 기반으로 평가하였다(HCAAP 처리라 부른다). 조우하는 선박들의 군집은 계층 프로그램에 의해 모아지고, 예비 평가와 결합되어 상대적으로 안전한 선박을 걸러내었다. 그런 다음, 각 군집 내에서 조우하는 선박 사이의 최근접점(DCPA) 및 최근접점까지의 도착시간(TCPA)까지의 시간을 계산하여 충돌위험지수(CRI)와의 관계를 비교하였다. 조우하는 선박들간의 군집에서 CRI와 DCPA 및 TCPA 수학적 관계는 음의 지수 함수로 구성되었다. 이러한 CRI로부터 운영자는 명시된 해역에서 항해하는 모든 선박의 안전성을 보다 쉽게 평가할 수 있으며, 프레임워크는 해상운송의 안전과 보안을 개선하고 인명 및 재산 손실을 줄일 수 있다. 본 연구에서 제안된 프레임워크의 효과를 설명하기 위해 국내의 목포 연안 해역에서 실험 사례 연구를 수행하였다. 그 결과, 본 연구의 프레임워크가 각 군집 내에서 조우 선박 간의 충돌 위험 지수를 탐지하고 순위를 매기는 데 효과적이고 효율적이라는 것을 보여 주었으며, 추가연구를 위한 자동 위험 우선순위를 지정할 수 있게 해주었다.

• 정보처리학회논문지A
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• 제17A권5호
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• pp.229-236
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• 2010

인터넷이나 기업체 안에서 생성되는 문서의 수가 빠르게 증가하고 있고 이에 따라 효율적인 문서 검색 서비스의 중요성도 함께 커지고 있다. 이런 검색 환경에서 사용자의 검색 질의를 미리 예측할 수 없기 때문에 문서 내의 키워드를 자동 추출하여 색인어로 사용하는 전문검색(full-text search)이 일반적으로 적용된다. 전문검색을 위해 생성된 색인 파일의 크기는 문서 수 증가로 대용량화 되고, 이런 대용량 색인에 대한 다중 키워드 질의 처리에는 과도한 디스크 비용이 초래될 수 있다. 논문에서는 이런 비용 문제를 해결하기 위해 대용량 문서의 전문검색 시스템에서 다중 키워드 질의를 효율적으로 처리할 수 있게 하는 색인 파일 구조 및 관리 기법을 제안한다. 제안된 방법은 다중 키워드 검색에 적합한 것으로 알려진 역파일을 기본 색인 구조로 하며, 질의 처리의 조인 연산과 랭킹 연산에 적합하도록 색인 파일을 계층화한다. 이를 바탕으로 다중 키워드 질의를 구성할 확률이 높은 키워드 쌍에 대한 조인 연산 결과를 주기억장치 공간에 동적으로 저장함으로써 디스크 사용량을 크게 줄일 수 있다. 논문에서는 제안된 기법의 우수성을 보이기 위해 디스크 비용 모델에 기반한 성능 비교도 수행한다.

• 한국임상보건과학회지
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• 제1권3호
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• pp.49-61
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• 2013

Purpose. The purpose of this study is to analyze difference in quality of life related to health according to our country's social stratification. Methods. This study had analytical subjects as 7,992 adults(4,557 men, 3,435 women), who are included in a variable by social stratification among 15,691 people in the age group of 20~69 years old as examinees, based on the 4th Korea National Health and Nutrition Examination Survey. Results. This study obtained the following results. First, seeing the score of health-related life quality by social stratification, namely, the distribution of EQ-5D index, the new middle class(class II) was the highest(men with 0.966 point, women with 0.955 point). The agricultural self-employed class(class V) was indicated to be the lowest(men with 0.918 point, women with 0.866 point). In general, the more belonging to low social stratification led to having shown the lower aspect in EQ-5D index value. Second, as for the results of the hierarchical regression analysis, the factors of contributing to difference by social stratification in health-related quality of life were chronic disease, job stress, education, and income level in both men and women. The health behavior was grasped to be a factor of contributing only to women. Conclusions. To reduce difference in health-related quality of life according to social stratification in the future, the continuous investment is needed for supporting socially high-quality education and economic stability. The sphere of health will need to be given priority to the prevention of chronic disease and the development in effective management policy for the lower classes.

• 한국의상디자인학회지
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• 제4권3호
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• pp.89-95
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• 2002

Object of this study presents marketing of new market segmentation as what I classify a social stratum, and analyze sense of value about each social class clothes and a taste, but is. The study way used a questionnaire as an investigation study way, and I did execution from September to October in 1999, and the investigation object picked up an any table with the woman university student who lived in Seoul and did investigation, and analysis targeted total 550 people. I used a measurement item of economic capital and cultural capital as a classification item of a social stratum and selected a dwelling, a kind of property, an annual salary of parents as an index of economic capital. Presentation held an occupation of parents, scholarship, culture activity as an index of cultural capital. It is social stratum structure an occupation arranges in 12 job categories by, for your reference, I do a social orbit of the P. Bourdieu which is a French sociologist and an index of inheritance cultural capital, and having set up eight phases of evaluation, and to do a Y, Cultural Capital with X with economic capital. Sense of value about clothes and attitude selected social value, aesthetic appreciation enemy value, authority a few value in sense of value of the 6 type that E. Spranger(1922) presented, and a proposal did type in 3 about clothes. The measurement way used a 11 question item and measured I with five phases of Likert-type criteria and executed factors analysis by main ingredient analysis and varimax revolution law. I named a more than inherent 1 with the liver which was social man, aesthetic appreciation enemy man, an authority enemy with a basis. The results are as follows : People of the group which they belong to the same social class, and there is have a similar taste and select a similar product, and scholarship and an occupation of parents please lay a taste of children and sense of value, a hierarchical difference of attitude too and do it.