some manufacturers claim to have produced new irreversible hydro-colloids that are able to maintain their dimensional stability during storage. the present study evaluated the effect of storage time on dimensional stability of three alginates: hydrogum 5, tropicalgin and alginoplast.in this experimental in-vitro trial, a total of 90 alginate impressions were made from a dentoform model using hy...

conclusions the individual characteristics, educational background and admission criteria had showed relation with academic failure. vulnerable students should be identified and educational supports should be provided for these students. results the frequency of course repetition, probation, and delayed graduation was reported to be 19.25%, 3.9% and 19.85%, respectively. gaining low grade in hi...

background: advances in radiation dosimetry concepts and the development of primary measurement standards based on absorbed dose to water over the last decades offer the possibility to calibrate ionisation chambers directly in terms of absorbed dose to water. the aim of this study is the investigation on utility of artificial body fluid (abf) instead of water by comparing dosimetric measurement...

the issue of sustainable development has been widely acknowledged and spread rapidly after united nations conference on environment and development in rio in 1992. considerable attention is given to urban settlement areas. thus, role of urban development is seen as a challenging issue under circumstances. outcomes of the current patterns of world population growth and industrial development are...

abstract- the evaluation of leaf area and leaf nutritional value is important for crop growth modeling and estimations of its performance. the purpose of this study was to use image processing techniques to develop an economical method to ease the assessment of nutrient status and leaf area (la) of plants and to compare the outcomes of this method with linear models. leaf area and leaf chloroph...

conclusions this study indicated that the modified version of the adult nvps in step with the vrs is a useful tool for pain intensity assessment in the ed. results the average age of the participants was 35.2 years, and the extremities were the most common painful area (66.2%). the mean vrs and nvrs pain intensity ratings upon arrival were 6.16 (± 2.63) and 3.06 (± 2.17), respectively. the esti...

state estimation is the foundation of any control and decision making in power networks. the first requirement for a secure network is a precise and safe state estimator in order to make decisions based on accurate knowledge of the network status. this paper introduces a new estimator which is able to detect bad data with few calculations without need for repetitions and estimation residual cal...

this paper presents the application of the matching pursuit method to model synchronous generator. this method is useful for online analysis. in the proposed method, the field voltage is considered as input signal, while the terminal voltage and active power of the generator are output signals. usually, the difference equation with a second degree polynomial structure is used to estimate the co...