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Work Sampling을 利用한 生産性 向上 方案을 위한 硏究
金銀源 조선대학교 경영경제연구소 1993 經營經濟硏究 = Management and economics research Vol.16 No.1
This thesis is a study on the work sampling which is one of the important parts in the fields of work measurement today. So, a method of study was 1. Apply a theory work sampling to assembly line and all operation analysis was executed. 2. Apply a theory result-factor to operation analysis of result and unnecessary movement course, unnecessary work-factors was removed. The result was A sample assembly line work composition was set up therefore, by all means being raised adaptable ability. The effect was raised productive elevation.
Maycock, Colin R.,Khoo, Eyen,Kettle, Chris J.,Pereira, Joan T.,Sugau, John B.,Nilus, Reuben,Jumian, Jeisin,Burslem, David F.R.P. Institute of Forest Science 2012 Journal of Forest Science Vol.28 No.3
Sabah has experienced a rapid decline in the extent of forest cover. The precise impact of habitat loss on the conservation status of the plants of Sabah is uncertain. In this study we use the niche modelling algorithm MAXENT to construct preliminary, revised and final ecological niche models for Dipterocarpus lamellatus and Dipterocarpus ochraceus and combined these models with data on current land-use to derive conservation assessments for each species. Preliminary models were based on herbarium data alone. Ground surveys were conducted to evaluate the performance of these preliminary models, and a revised niche model was generated from the combined herbarium and ground survey data. The final model was obtained by constraining the predictions of the revised models by filters. The range overlap between the preliminary and revised models was 0.47 for D. lamellatus and 0.39 for D. ochraceus, suggesting poor agreement between them. There was substantial variation in estimates of habitat loss for D. ochraceus, among the preliminary, revised and constrained models, and this has the potential to lead to incorrect threat assessments. From these estimates of habitat loss, the historic distribution and estimates of population size we determine that both species should be classified as Critically Endangered under IUCN Red List guidelines. Our results suggest that ground-truthing of ecological niche models is essential, especially if the models are being used for conservation decision making.
Colin R. Maycock,Eyen Khoo,Chris J. Kettle,Joan T. Pereira,John B. Sugau,Reuben Nilus,Jeisin Jumian,David F. R. P. Burslem 강원대학교 산림과학연구소 2012 Journal of Forest Science Vol.28 No.3
Sabah has experienced a rapid decline in the extent of forest cover. The precise impact of habitat loss on the conservation status of the plants of Sabah is uncertain. In this study we use the niche modelling algorithm MAXENT to construct preliminary, revised and final ecological niche models for Dipterocarpus lamellatus and Dipterocarpus ochraceus and combined these models with data on current land-use to derive conservation assessments for each species. Preliminary models were based on herbarium data alone. Ground surveys were conducted to evaluate the performance of these preliminary models, and a revised niche model was generated from the combined herbarium and ground survey data. The final model was obtained by constraining the predictions of the revised models by filters. The range overlap between the preliminary and revised models was 0.47 for D. lamellatus and 0.39 for D. ochraceus, suggesting poor agreement between them. There was substantial variation in estimates of habitat loss for D. ochraceus, among the preliminary, revised and constrained models, and this has the potential to lead to incorrect threat assessments. From these estimates of habitat loss, the historic distribution and estimates of population size we determine that both species should be classified as Critically Endangered under IUCN Red List guidelines. Our results suggest that ground-truthing of ecological niche models is essential, especially if the models are being used for conservation decision making.
박상구(Sang-Ku Park),정성연(Sung-Eyen Jeong),김재중(Jae-Jung Kim),손영갑(Young-Kap Son),장석원(Seog-Weon Chang),곽계달(Kae-Dal Kwack) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
This paper presents an accelerated life test for bum out of tungsten filament of incandescent lamp. There are many failure modes and failure factors that associated with tungsten filament. But in this explain the dominant failure mode of tungsten filament is the burnout of the filament failure. At first, vapor, high temperature and voltage are selected as stress factors by using of two stage Quality Function Deployment(QFD). And we planed accelerated life test that has two factors(temperature, voltage) and two levels. By experiment it has absorbed that high temperature and over voltage have an effect on the life of the incandescent lamp. Using ALTA programs, we estimated the common shape parameter of Weibull distribution, life-stress relationship, B₁? life and accelerating factors.