959 research outputs found
C.B. Biezeno (March 2, 1888 - September 5, 1975)
No full textObituary of prof. C.B. Biezeno, written by his former PhD candidate and his later colleague prof. W.T. Koiter.Mechanical, Maritime and Materials Engineerin
Helping children think: Gaze aversion and teaching
No full textLooking away from an interlocutor's face during demanding cognitive activity can help adults answer challenging arithmetic and verbal-reasoning questions (Glenberg, Schroeder, & Robertson, 1998). However, such `gaze aversion' (GA) is poorly applied by 5-year-old school children (Doherty-Sneddon, Bruce, Bonner, Longbotham, & Doyle, 2002). In Experiment 1 we trained ten 5-year-old children to use GA while thinking about answers to questions. This trained group performed significantly better on challenging questions compared with 10 controls given no GA training. In Experiment 2 we found significant and monotonic age-related increments in spontaneous use of GA across three cohorts of ten 5-year-old school children (mean ages: 5;02, 5;06 and 5;08). Teaching and encouraging GA during challenging cognitive activity promises to be invaluable in promoting learning, particularly during early primary years
Placental composition and surface area but not vascularization are altered by maternal protein restriction in the rat
No full textAmino acids are essential nutrients for foetal growth and development, and maternal protein restriction decreases foetal growth despite increasing placental size. To determine if placental structure is altered so as to impair function despite increased size, the effect of maternal protein restriction on the composition and vascularization of the placenta in the rat was determined.
Pregnant rats were randomized to receive either a normal protein (20 per cent) or an isocaloric low (8 per cent) protein diet. Placentae were studied at day 18 of gestation. Tissue sections were stained with biotinylatedBandeiraea simplicifolia (BS-1) lectin to allow identification of foetal capillaries, and analysed using stereological techniques.
Protein restriction increased total placental volume, but decreased the proportion of the placental volume composed of labyrinth. Consequently the total volumes of labyrinthine tissue and of foetal and maternal blood space were not different between the two groups.
Protein restriction increased the surface area density and total surface area of the materno-foetal interface, but did not alter foetal capillary surface area, diameter or length.
This study found that maternal protein restriction is associated with an increase in placental size, and that this enlargement is accompanied by increases in some, but not all, structural crelates of function
Rede uitgesproken op 17 september 1956 ter gelegenheid van de erepromotie van Dr. Th. von Karman door de promotor Dr. C.B. Biezeno
No full textRede uitgesproken door prof. C.B. Biezeno ter gelegenheid van de erepromotie aan de TH Delft van dr. Theodore von Karman.Precision and Microsystems EngineeringMechanical, Maritime and Materials Engineerin
Effects of maternal iron restriction on placental vascularization in the rat
No full textTo investigate the effects of maternal iron deficiency and anaemia on the placenta the composition and vascularization of the placental labyrinth was investigated in iron-restricted rats. Rats in the experimental groups were placed on iron-restricted diets either 1 or 2 weeks before mating and continued on these diets throughout gestation. Placentae were studied at day 21 of gestation. Tissue sections were stained with lectin to allow identification of fetal capillaries and analyzed using stereological techniques. Capillary surface area density and total capillary surface area were decreased in both iron-restricted groups compared with the control group. Capillary length density was decreased in both iron-restricted groups compared with the control group. Total capillary length was significantly reduced in the 1-week, but not in the 2-week, iron-restricted group compared with the control group. Endothelial cell volume was increased in both iron-restricted groups compared to the controls. There were no significant differences in the volume of fetal capillaries, the volume of the maternal blood spaces or the surface area of the maternal–fetal interface between the control and iron-restricted groups. Labyrinthine volume, labyrinthine tissue volume and the surface area of the maternal fetal interface were increased in the 2-week group when compared with the 1-week group. These changes in placental vascularization may contribute to the fetal growth retardation observed in iron-restricted litters
Biezeno en de mechanica - Herdenkingsdag 14 mei 1976.
No full textPresentations at a symposium commemorating the death of prof.dr.ir. C.B. Biezeno on 5 September 1975. Presentations by prof. A. van der Neut, prof. R.G. Boiten, prof. W.T. Koiter, prof. J.P. den Hartog, and prof. J.F. Besseling.Mechanical, Maritime and Materials Engineerin
De beteekenis der Wiskunde als Hulpwetenschap der Toegepaste Mechanica. Rede, uitgesproken bij de aanvaarding van het Ambt van Hoogleraar in de Toegepaste Mechanica aan de Technische Hoogeschool te Delft, den 30en September 1914.
No full textIntreerede van prof.ir. C.B. Biezeno.Mechanical, Maritime and Materials Engineerin
Afscheidscollege van Prof. Dr Ir C.B. Biezeno
No full textMechanical, Maritime and Materials Engineerin
John and Pete Johson with C.B. Olson
No full textPhotograph - Three men holding up furs with numerous furs hanging on a fence in the background, Soto Landing, Alberta. A note on back reads: John and Pete Johnson and C.B. Olson nearly cleaned a pack of wolves south side of Marten Mountain at Wasp Cree
A desirable future for technology risk management
No full textThis paper outlines a scenario for the future of Technology Risk Management which the author suggests is internally consistent, linked to current practice, achievable, and desirable. It is a personal view which reflects the concerns and goals of the author. It is offered as a basis for discussion with others of the goals we might seek jointly to facilitate effective progress
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