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Computer modelling of primary recrystallization.

100%

Walasek T.

tom R. XIX, nr 4

1272-1275

In the paper a Monte Carlo computer simulation technique has been applied to the problem of primary recrystallization. A continuum system of material has been modelled employing a discrete 2D lattice of 40 000 elements. The nucleation rate has been chosen so as to be time dependent. Both stored energy and grain boundary energy have been included in the present model. A deformed microstructure has been used as preliminary one in the present simulation. The modelling results have been discussed in terms of experimental observations. The microstructures produced on SMITWELD thermal cycle simulator and these produced by computer simulation have been examined on MAGICSCAN image analyser. The results show clear similarity as far as the recrystallized volume fractions, grain sizes and their shapes are concerned. The characteristic sigmoidal dependence of the recrystallized volume fraction in metals is properly reproduced.

Pomysł na... samochód elektryczny

100%

Walasek T.

tom Nr 9

24--27

Wszystko wskazuje na to, że już niebawem określenie samochód elektryczny na stałe zagości w naszym słowniku. Ograniczone zasoby ropy naftowej oraz troska o środowisko naturalne stanowią siłę napędową do rozwijania koncepcji electric vehicle (EV). Coraz więcej firm i instytucji interesuje się już tym tematem.

Ewolucja mikrostruktury podczas rekrystalizacji żelaza ARMCO

100%

Walasek T.

tom nr 4

25-28

Assuring quality of an e-learning project through the PDCA approach

51%

Walasek T. , Kucharczyk Z. , Morawska-Walasek D.

tom Vol. 48, nr 1

56-61

The aim of the paper is to present the methodology used to manage an extensive e-learning project at the Czestochowa University of Technology. Systematic and generic methodology was used to assure quality and homogeneity of the implemented on-line courses.

The arterial vascularization of the stomach fundus of human fetuses

45%

Skawina A. , Iskra T. , Musial A. , Walasek T. , Polakiewicz J.

tom 58

nr 3

We have investigated the existence, frequency and the course of arteries of the human stomach fundus by injection method. Our material obtained 52 human fetuses of the length range from 127 to 285 mm and the fetal age range from l5 to 28 weeks of gestation. It has been found, that the source of the arterial blood supply of this region are two arteries: the left gastric artery and splenic artery with its bigger branches: posterior gastric artery, superior polar artery and short gastric arteries. The source of arterial blood supply of the stomach fundus there have been two in 6 cases (11,5%) or three in 45 cases (86,6%) or four in 1 case (l,9%) of these arteries. We have analysed in detail the contribution and the range of the following arteries in the stomach quadrants. It has been shown, that the anterior medial quadrant has the best arterial blood supply and the anterior lateral has the worst one.