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Janssens, J.G. 한국상하수도협회 1986 水道 Vol.36 No.-
이 글은 85. 9. 16-21 서울에서 개최된 사단법인 한국수도협회 주최 제 5차 아시아태평양지역수도회의 및 전시회에 참석하였던 벨지움 앤트워프시 수도국의 J.G. Janssens박사가 국제수도협회지 AQUA No.2/1986에 기고한 전문을 번역한 것이다.
MEASURING MORBIDITY : AN SPPROACH USING POWER FUNCTIONS
JANSSENS, Gerrit K. 한국경영과학회 1988 韓國經營科學會誌 Vol.13 No.2
Subjective scoring by different groups on different status of morbidity are compared to objective data obtained from legal awards. A power law is tested between subjective and objective scores. Regression analysis by means of a power function provides a measure of consistency in its regression coefficient. Power functions fitting also leads to a justified use of geometric averaging of individual scores into group scores.
A PETRI NET-BASED CELL CONTROLLER FOR A FLEXIBLE MANUFACTURING SYSTEM
JANSSENS, GERRIT K.,TABUCANON, MARIO T. 한국경영과학회 1997 Management Science and Financial Engineering Vol.3 No.1
In a flexible manufacturing system, a cell controller is able to identify and evaluate a number of alternative decisions to meet the objectives set by the factory level controller. In this paper, a Petri net-based cell controller is presented to accomplish this task. A static model is developed by using the Integrated Computer Aided Definition(IDEF0) method to represent clear functional relationships among the objects of the system. Based on the static model, two Petri net models are developed for the physical part flow and for the information flow. Multiple decision alternatives are generated from the physical part flow model and are synchronized with the information flow model for execution of the selected alternative.
( J. A. Bouwstra ),( M. Janssens ),( A. P. M. Lavrijsen ),( J. Van Smeden ) 한국피부장벽학회 2015 한국피부장벽학회지 Vol.17 No.2
The skin barrier function is primarily located in the stratum corneum (SC) comprised of corneocytes and lipids The main lipid classes in the stratum corneum are ceramides, free fatty acids (FFAs), and cholesterol. These lipids form crystalline lipid lamellae. The composition and organization of these lipids are crucial for a proper skin barrier function, but the importance of the chain length distribution of the ceramides and FFAs for the impaired skin barrier is not known. We performed a clinical study in which the SC lipids and their importance for the skin barrier function was examined in atopic eczema patients and compared with control subjects. The lipid composition was examined with mass spectrometry. In particular the carbon chain length of the ceramides and FFAs was investigated in relation to the density of the SC lipid organization (examined by infrared spectroscopy) and the transepidermal water loss (TEWL), a marker for the skin permeability barrier. In addition we used lipid membrane studies to examine whether the changes observed in atopic dermatitis skin also results in an increased permeation across these membranes. In addition we examined whether inflammation that occurs in lesional AD skin could account for changes in lipid composition. This was done by supplementation culture medium of human skin equivalents with cytokines. A reduction was observed in the FFA and ceramide chain lengths for both non-lesional and lesional SC of AD patients compared to control skin. In lesional skin the reduction in chain length was more pronounced than in non-lesional skin(1). Furthermore, in lesional skin an increased level of unsaturated fatty acids was observed. The reduction in lipid chain length correlated excellent with a less dense lipid organization and a reduced skin barrier function. Besides, we examined the effect of mutations in the filaggrin gene on the lipids properties, a major predisposition factor for development of AD(2). However, no association was observed between lipid properties and filaggrin mutations. In order to examine whether the changes in lipid composition may be an important underlying factor for the reduced skin barrier in AD, we performed lipid membrane studies and showed that changes similar as observed in AD can account for on increased permeability of (model) drugs through these lipid membranes. In addition, we noticed that using human skin equivalents inflammation may induced changes in the lipid composition resulting in a compromised skin barrier. The current studies provides insights into the role of the SC lipid chain length and shows that the lipids play a role in the impaired skin barrier of AD patients. These results may provide opportunities for studies on skin barrier repair by topical treatments and shows evidence that normalisation of the lipid synthesis may enhance normalisation of the skin barrier function.