• 한국농공학회지
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• 제41권6호
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• pp.33-43
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• 1999

Drought is a serious diaster in agriculutre, especially to upland crops. Hence, the Agricultural Drought Analysis Model (ADAM) that is integratable with GIS was applied to analyae agriculture drought in upland. ADAM is composed of two sub-models , one is a Soil Water Balance Model (SWBM) and the other is a Drougth Analysis Model (DAM) that is based on the Runs theory. The ADAM needs weather data, rainfall data and soil physical characteristics data as input and calculates daily soil moisture contents. GIS was integrated to the ADAM for the calculation of regional soil moisture using digitized landuse map, detaile dsoil map, thiessen network and district boundary . For the agriculutral drought analysis, the ADAM adapt the Runs theory for analyzing drought duration, severity and magnitude . Log-Pearson Type-III probability distribution function and Kolmogorov-Smirnov test were used to test the fitness of good of the model. The integration of ADAM with GIS was successfully implemented and would be operated effectively for the regional drought analysis.

• 조명전기설비학회논문지
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• 제18권6호
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• pp.176-182
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• 2004

본 논문에서는 시간지연을 갖는 고차모델을 저차모델로 간소화하기 위한 주파수 전달함수 합성법을 제안한다. 모델축소는 축소시스템의 분자다항식에 의해 가중된 오차함수를 최소화하는 것에 기반을 두고 있다. 제안된 방법은 보다 우수한 저주파수 적합도를 제공한다. 그리고 네 개의 예제가 제안된 방식의 유용성을 나타내기 위해서 주어진다.

• 동서간호학연구지
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• 제27권2호
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• pp.95-103
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• 2021

Purpose: This study was conducted to investigate the structural equation modeling of retention intention in nurses. Methods: A total of 210 nurses from three hospitals in B city, South Korea participated in this study. A structural equation model was constructed to verify the fitness of this model. Data were analyzed using SPSS 20.0 and AMOS 21.0 programs. Results: The hypothetical model appeared to fit the data. Three of the selected six hypotheses for the hypothetical model were statistically significant. The retention intention model showed significant direct effects for job crafting and job demands and indirect effects for relation oriented culture, which explained 28% of the variation in nurses' retention intention. Conclusion: We found that nurses' job crafting behavior and job demands had significant influences on retention intention and relation oriented culture which affected by the factors job crafting.

• 한국의류학회지
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• 제34권5호
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• pp.844-855
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• 2010

An important issue for the improvement of product quality is to identify and understand the customer-required attributes of a product. This paper identifies and analyzes customer-required attributes of formal knitwear for middle age and elderly women through the use of the Kano model in order to develop competitive products. Various research methods were used in this study. Customer voices for formal knitwear were collected by means of brainstorming and in-depth interviews. The collected customer voices were transformed into customer-required attributes with the use of an affinity diagram. In addition, the data was collected by means of a questionnaire and was statistically analyzed to examine the dimensions of customer-required attributes on the basis of the Kano model. The results are as follows. Five categories of customer-required attributes were identified (symbolism, aesthetic, fitness, usefulness, and maintenance). The analysis based on the Kano model identifies a strong one-dimensional quality in all of the categories of customer-required attributes and the attractive quality that includes a one-dimensional quality in the categories of fitness and usefulness. The findings of this study demonstrate the applicability of the affinity diagram for apparel that educates formal knitwear developers of the customer-required attributes that they should strategically focus on in order to develop competitive products.

• Ocean Systems Engineering
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• 제9권3호
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• pp.287-328
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• 2019

Comprehensive understanding of the flood risk assessments via frequency analysis often demands multivariate designs under the different notations of return periods. Flood is a tri-variate random consequence, which often pointing the unreliability of univariate return period and demands for the joint dependency construction by accounting its multiple intercorrelated flood vectors i.e., flood peak, volume & durations. Selecting the most parsimonious probability functions for demonstrating univariate flood marginals distributions is often a mandatory pre-processing desire before the establishment of joint dependency. Especially under copulas methodology, which often allows the practitioner to model univariate marginals separately from their joint constructions. Parametric density approximations often hypothesized that the random samples must follow some specific or predefine probability density functions, which usually defines different estimates especially in the tail of distributions. Concentrations of the upper tail often seem interesting during flood modelling also, no evidence exhibited in favours of any fixed distributions, which often characterized through the trial and error procedure based on goodness-of-fit measures. On another side, model performance evaluations and selections of best-fitted distributions often demand precise investigations via comparing the relative sample reproducing capabilities otherwise, inconsistencies might reveal uncertainty. Also, the strength & weakness of different fitness statistics usually vary and having different extent during demonstrating gaps and dispensary among fitted distributions. In this literature, selections efforts of marginal distributions of flood variables are incorporated by employing an interactive set of parametric functions for event-based (or Block annual maxima) samples over the 50-years continuously-distributed streamflow characteristics for the Kelantan River basin at Gulliemard Bridge, Malaysia. Model fitness criteria are examined based on the degree of agreements between cumulative empirical and theoretical probabilities. Both the analytical as well as graphically visual inspections are undertaken to strengthen much decisive evidence in favour of best-fitted probability density.

• 한국산학기술학회논문지
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• 제20권2호
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• pp.543-551
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• 2019

본 연구의 목적은 중년남성의 자살생각에 영향을 미치는 스트레스, 사회적지지, 우울, 음주 간의 인과관계를 알아보고자 시도하였다. 연구대상자는 만44-64세 중년남성 236명을 대상으로 자가 보고형 설문지를 이용하였으며, 2018년 4월 11일 부터 6월 01일까지 자료 수집하였다. 수집된 자료는 PASW 21.0과 AMOS 18.0 programs을 이용하여 경로분석을 실시하였으며, 최종 모형의 적합지수는 RMSEA .05, GFI .99, AGFI .95, NFI .98로 나타났다. 연구결과는 다음과 같다. 첫째, 중년남성의 스트레스는 우울, 음주에 직접효과가 있었고, 사회적 지지는 우울에 직접효과가 나타났다. 둘째, 중년남성의 스트레스와 사회적 지지는 자살생각에 직접효과가 나타났으며, 스트레스와 사회적 지지는 자살생각에 간접효과가 나타났다. 따라서 중년 남성의 스트레스와 사회적 지지는 자살생각관계에서 우울의 부분매개효과가 확인되었다. 이러한 결과를 바탕으로 중년남성의 자살생각에 미치는 영향요인을 기초하여 자살생각을 감소할 수 있는 프로그램 개발 및 적용하는 것이 필요하다. 또한 본 연구의 결과가 자살생각의 기초자료로 활용되기를 기대한다.

• 통상정보연구
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• 제14권1호
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• pp.391-418
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• 2012

최근의 소셜 네트워크 서비스 (Social Network Service)는 그 사용범위와 목적이 확장하고 있다. 초기의 이메일, 리스트서브, 뉴스그룹 등 비교적 동질적 집단 간의 네트워킹 중심의 SNS로부터, 이제는 기업들에게도 게시판, 개인의 미니홈피나 블로그, Facebook, Twitter를 이용한 소셜미디어 마케팅이라는 개념이 형성되고 있다. 본 연구에서는 소셜미디어 활용과 수출마케팅 성과의 관계성을 검증하는 것이 목적이다. 이를 위하여 SNS활용의 유형을 살펴보고, 이들과 수출마케팅 성과와의 관계를 검증하고자 하였다. 연구결과, SNS활용은 수출마케팅 성과와 직접적인 영향을 미치는 것으로 분석되었다. 또한 제품의 온라인 적합성과 조직의 혁신수용성은 SNS활용에 긍정적인 영향을 미치는 것으로 도출된 반면, 마케팅역량과 국제화역량은 SNS활용을 통하여 수출마케팅성과로 이어지지 않는다고 파악되었다. 따라서 SNS의 활용을 증진시킬 수 있는 제품과 서비스의 개발과 함께, 조직 내부의 SNS활용에 대한 적극적 관심과 수용이 필요하다는 점을 시사하고 있다.

• Journal of Preventive Medicine and Public Health
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• 제51권5호
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• pp.227-233
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• 2018

Objectives: Chronic diseases, including back pain, result in significant patient morbidity and societal burden. Overall improvement in physical fitness is recommended for prevention and treatment. Walking is a convenient modality for achieving initial gains. Our objective was to determine whether neighbourhood walkability, acting as a surrogate measure of physical fitness, was associated with the presence of chronic disease. Methods: We conducted a cross-sectional study of prospectively collected data from a prior randomized cohort study of 227 patients referred for tertiary assessment of chronic back pain in Ottawa, ON, Canada. The Charlson Comorbidity Index (CCI) was calculated from patient-completed questionnaires and medical record review. Using patients' postal codes, neighbourhood walkability was determined using the Walk Score, which awards points based on the distance to the closest amenities, yielding a score from 0 to 100 (0-50: car-dependent; 50-100: walkable). Results: Based on the Walk Score, 134 patients lived in car-dependent neighborhoods and 93 lived in walkable neighborhoods. A multivariate logistic regression model, adjusted for age, gender, rural postal code, body mass index, smoking, median household income, percent employment, pain, and disability, demonstrated an adjusted odds ratio of 2.75 (95% confidence interval, 1.16 to 6.53) times higher prevalence for having a chronic disease for patients living in a car-dependent neighborhood. There was also a significant dose-related association (p=0.01; Mantel-Haenszel chi-square=6.4) between living in car-dependent neighbourhoods and more severe CCI scores. Conclusions: Our findings suggest that advocating for improved neighbourhood planning to permit greater walkability may help offset the burden of chronic disease.

• 한국재료학회지
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• 제11권6호
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• pp.492-497
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• 2001

통계적 방법을 사용하여 스퍼터 증착한 Ta 박막의 증착속도, 비저항, 면저항 균일도, 반사도, 응력 등의 물성을 측정하고 분석하였다. RS/1의 표면 반응 분석법에 의해 독립변수와 종속변수간의 함수관계를 예측하였으며. 이때 비저항과 면저항의 균일도 측면에서 최적조건은 증착 압력 2 mTorr, 증착 전력 8 W/$\textrm{cm}^2$ 및 기판온도 $20^{\circ}C$였다. 실험 모텔의 신뢰성 (fitness)은 풀링(pooling)하지 않은 경우 0.85 ~0.9의 값을 얻었다. 본 조건하에서 증착된 박막은 비저항 180$\mu$$\Omega$cm와 면저항 균일도 ~ 2%의 값을 가졌다. 투과전자 현미경과 X선 회절법을 이용하여 분석한 결과 증착된 박막은 100~200 정도의 결정립 크기를 갖는 $\beta$-Ta 임을 확인하였다.

• 한국산림과학회지
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• 제98권6호
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• pp.633-638
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• 2009

본 연구는 인도네시아 칼리만탄 지역의 유칼립투스 및 아카시아 조림지에 대해 수간곡선식을 도출하고 수간재적표를 조제하고자 하였다. 유칼립투스와 아카시아 조림지에 적합한 수간곡선식의 도출을 위해서 Max&Burkhart식 등 세 가지 수간곡선 모형을 적용하였으며, 적합도, 편의, 잔차의 표준 편차 등의 통계량을 분석하여 각 모델의 적합성을 평가하였다. 그 결과 유칼립투스와 아카시아의 수간생장을 표현하는 데에는 Kozak식이 가장 적합한 것으로 나타났다. 따라서 Kozak식을 이용하여 유칼립투스와 아카시아의 수간재적표를 조제하였으며, 현지에서 이용되는 지방적 재적표 상의 동일 크기 임목과 비교한 결과 큰 차이가 없는 것으로 나타났다. 본 연구에서 제시된 해외조림지 임목생장에 대한 정보를 토대로 해외조림지에 대한 보다 효율적인 의사결정이 가능하고 체계적인 산림경영이 이루어질 것으로 기대한다