• Journal of the Korean Statistical Society
• /
• 제29권2호
• /
• pp.231-245
• /
• 2000

This paper considers a linear regression model with space and time data in where the disturbances follow spatially correlated error components. We provide the best linear unbiased predictor for the one way error components. We provide the best linear unbiased predictor for the one way error component model with spatial autocorrelation. Further, we derive two diagnostic test statistics for the assessment of model specification due to spatial dependence and random effects as an application of the Lagrange Multiplier principle.

• Steel and Composite Structures
• /
• 제27권6호
• /
• pp.761-775
• /
• 2018

In the present work, the recently developed non-polynomial shear deformation theories are assessed for thermo-mechanical response characteristics of laminated composite plates. The applicability and accuracy of these theories for static, buckling and free vibration responses were ascertained in the recent past by several authors. However, the assessment of these theories for thermo-mechanical analysis of the laminated composite structures is still to be ascertained. The response characteristics are investigated in linear and non-linear thermal gradient and also in the presence and absence of mechanical transverse loads. The laminated composite plates are modelled using recently developed six shear deformation theories involving different shear strain functions. The principle of virtual work is used to develop the governing system of equations. The Navier type closed form solution is adopted to yield the exact solution of the developed equation for simply supported cross ply laminated plates. The thermo-mechanical response characteristics due to these six different theories are obtained and compared with the existing results.

• 기본간호학회지
• /
• 제11권2호
• /
• pp.220-225
• /
• 2004

Purpose: The purpose of this study was to test the reliability and validity of FAI and to apply it in Korea. Method: Data were collected from 180 middle-age women. The questionnaire, which was originally developed by Schwartz, Jandorf & Krupp, was analyzed using Cronbach's a and factor analysis. Results: Cronbach's a for the FAI was .9198. As a result of item analysis, 27 items were selected from the total of 29 items, Items that showed low correlation with the total scale were excluded. Six factors were fixed from the data analysis performed using principle component analysis and varimax rotation. These six factors account for 65.3% of total variance. The first factor was global fatigue severity, and the second one was fatigue consequences. The other factors were method of fatigue reduction, fatigue caused by exercise, fatigue caused by routine activity, and fatigue caused by stress and depression, sequentially. Conclusion: The reliability and validity of FAI were verified.

• 부모자녀건강학회지
• /
• 제9권2호
• /
• pp.101-115
• /
• 2006

Purpose: The purpose of this paper is to describe the development of health educational program for maternity using principle of user centered design. Method: Research process includes five distinct phases: needs assessment, analysis, design, development/testing/revision, and application release. Results: This program includes an introduction, pregnancy test and fetal assessment, maternal and fetal change during pregnancy, self-care methods during pregnancy, complication of postpartum period, process of labor, complication of pregnancy, self care during the postpartum period, information for parenting skill, father page, FAQ, helping resources and institutions. Conclusion: The program will be distributed to health centers for maternal health education. The second phase of this project was evaluation this program for further development of the program. The end result of this program will be pregnant women with a high degree of usability. Author believe this program have true potential in helping maternal health promotion and successful parenting.

• 한국자동차공학회논문집
• /
• 제13권6호
• /
• pp.177-186
• /
• 2005

Today the tastes of consumers change rapidly and the kinds of the products become diverse. Therefore the product life cycle becomes shorter and shorter. Moreover the save of resources and the recycling for the environmental preservation are the essential theme. On this the necessary information for the product development increases enormously. For the right use of the information the design process should be supported by the proper design tool. For this the 'design catalogue system for recycling' is suggested here. This system consists of four parts, that is, 'the existing automobile system database', 'working principle database', 'assessment system of the ease of disassembly' and 'one's own product development database'. By the use of this system the product development period could be reduced about $30\%$ drastically.

• 한국CDE학회논문집
• /
• 제11권1호
• /
• pp.67-76
• /
• 2006

Today the tastes of consumers change rapidly and the kinds of the products become diverse. There- fore the product life cycle becomes shorter and shorter. Moreover the save of resources and the recycling for the environmental preservation are the essential theme. On this the necessary information for the product development increases enormously. For the right use of the information the design process should be supported by the proper design tool. For this the 'design catalogue system for recycling' is suggested here. This system consists of four parts. that is, 'the existing automobile system database', 'welting principle database', 'Assessment system of the ease of disassembly' and 'one's own product development ratabase'. By the use of this system the product development period could be reduced about 30% drastically.

• Environmental Analysis Health and Toxicology
• /
• 제24권3호
• /
• pp.261-270
• /
• 2009

To make measurable regulatory decisions of chemicals, it is necessary to consider their effect on the human health and ecosystem. In principle, this is based on relevant toxicity studies conducted by accepted guidelines. However, current regulatory programs in various countries confront challenges related to risk assessment of large numbers of chemicals within the restricted resources and time. Therefore there is a need for more efficient approach to limit the number of tests to be conducted. This promotes the development of powerful nontesting methods (e.g. (Q)SARs) and permits to use the predicted data for regulatory purpose. In this article, current status of non-testing methods in various chemical regulatory programs was reviewed in terms of their application and research activity on them. Finally, their usefulness associated with development of domestic regulatory program was suggested.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2002년도 춘계학술대회 논문집
• /
• pp.473-480
• /
• 2002

In this paper, it was proposed that hazard analysis and risk assessment about railway signal systems using FTA(Fault Tree Analysis) and ETA(Event Tree Analysis) one of the reliability analysis methods executed and output value based on the hazard baseline of CENELEC and EC 61508 producted, and also the SIL(Safety Integrity Level)/THR(Tolerable Hazard Rate) about the system set. On the basis of this principle, more systematic standardizations are required to operate railway system and in the future, we hope that safety and reliability of signal equipment will be better improved.

• 대한감각통합치료학회지
• /
• 제12권1호
• /
• pp.13-23
• /
• 2014

목적: 본 연구의 목적은 ASI$^{(R)}$의 중재 교육을 6명의 작업치료사에게 실시하고, 교육 전과 후에 ASI$^{(R)}$의 중심원리 수행도를 자기-평가, 타인-평가, 전문가-평가로 알아보는 것이다. 연구 방법: 2013년 11월 30일부터 2014년 6월 30일까지 총 6명의 작업치료사를 대상으로 연구가 이루어졌다. 총 8주 동안 6회의 ASI$^{(R)}$ 중재 교육을 실시하였고, 대상자들이 ASI$^{(R)}$ 중재 교육 전에 촬영한 치료 동영상과 교육 후에 촬영한 치료 동영상을 평가하였다. 평가는 교육전과 후에 자기-평가, 타인-평가, 전문가-평가로 실시하였고, 이 자료를 바탕으로 Mann-Whitney, ICC (Intra-Class Correlation)로 분석하였다. 결과: 영역III(평가기록), IV(공간과 도구), V(부모, 교사와의 의사소통)의 구조적 요소 합의 결과는 $79.33{\pm}18.27$점이었다. 평가방법에 따른 ASI$^{(R)}$ 중재 교육 전과 후의 과정요소 차이를 살펴본 결과, 자기-평가에서는 '감각조절 제공', '활동선택에서 협력', '활동의 성공보장', '놀이에 대한 아동의 내적 동기를 지지', '치료적 연합', '과정요소의 합'에서 교육 전보다 교육 후에 점수가 향상되었다. 타인-평가에서는 '물리적 안정성 보장'을 제외한 모든 항목에서 통계학적으로 유의한 차이를 보였다. 전문가-평가에서는 '감각의 기회제공'을 제외한 모든 항목에서 통계학적으로 유의한 차이를 보였다. ASI$^{(R)}$ 중재 교육 전에 실시한 자기-평가와 전문가-평가에서는 '물리적 안정성 보장'항목에서 통계학적으로 유의한 차이를 보였다. 교육 후에 실시한 자기-평가와 전문가-평가에서도 '물리적 안정성 보장' 항목에서 차이를 보였다. 결론: 본 연구의 결과는 정확한 감각통합중재를 위해 ASI$^{(R)}$의 중재 교육이 필요함을 강조하고, 치료사 스스로의 치료적 스타일을 점검하는 것이 중요하다는 것을 제시한다.

• Environmental Analysis Health and Toxicology
• /
• 제29권
• /
• pp.16.1-16.9
• /
• 2014

Objectives Rapid increase in engineered nanoparticles (ENPs) in many goods has raised significant concern about their environmental safety. Proper methodologies are therefore needed to conduct toxicity and exposure assessment of nanoparticles in the environment. This study reviews several analytical techniques for nanoparticles and summarizes their principles, advantages and disadvantages, reviews the state of the art, and offers the perspectives of nanometrology in relation to ENP studies. Methods Nanometrology is divided into five techniques with regard to the instrumental principle: microscopy, light scattering, spectroscopy, separation, and single particle inductively coupled plasma-mass spectrometry. Results Each analytical method has its own drawbacks, such as detection limit, ability to quantify or qualify ENPs, and matrix effects. More than two different analytical methods should be used to better characterize ENPs. Conclusions In characterizing ENPs, the researchers should understand the nanometrology and its demerits, as well as its merits, to properly interpret their experimental results. Challenges lie in the nanometrology and pretreatment of ENPs from various matrices; in the extraction without dissolution or aggregation, and concentration of ENPs to satisfy the instrumental detection limit.