Over grenzen van de curatieve gezondheidszorg

Afscheidscollege als gewoon hoogleraar neurochirurgie aan de Erasmus Universiteit te Rotterdam op 13 juni 198

Op Gegist Bestek: een poging tot plaatsbepaling van de neuro-chirurgie in het medisch onderwijs

Rede, uitgesproken bij de aanvaarding van het ambt van Gewoon Hoogleraar in d Neuro-chirurgie aan de Medische Faculteit te Rotterdam, op donderdag 30 oktober 196

Biochemical evaluation of the nutrition status of Urban Primary school children: riboflavin status

Click on the link to view

Biochemical investigation of the nutrition status of urban school children aged 12 -15 years: Protein status

No Abstract

Aging and stability of microporous sol-gel-modified ceramic membranes

Aging experiments on microporous sol-gel-derived nonsupported Si02 membranes were performed. Microstructure characterization was performed using nitrogen physisorption. It is found that both chemical aging and thermal aging result in densification of the microstructure, without pore growth. The influence of aging on supported SiO2-modified membranes was investigated using gas permeation and separation experiments. As for the nonsupported materials, some densification takes place. This leads to lower permeation rates, but a strong positive effect was observed on the separation properties. This might be attributed to a decrease of the pore size. Separation factors ranging from 50 to 125 have been measured for H2/CH4 at temperatures in the order of 250°C

Biochemical evaluation of the nutrition status of urban school children of 12-15 years - riboflavin status

No Abstract

Mental Condition and Ventricular Size in Arrested Hydrocephalus: an Analysis of 29 Shunt‐independent Children

Measurement of the diameter of the ventricular system, in a series of 29 patients with arrested hydrocephalus who had become shunt‐independent, showed that enlargement of the ventricles does not necessarily play a part in the arrest of hydrocephalus, for in many of these cases the ventricles were normal or only slightly enlarged. A study was made of the relationship between ventricular width and intelligence. Although children with the lowest IQS usually had a very wide ventricular system and those with the highest IQS a ventricular system of normal size, normal intelligence was compatible with ventricles of any size. It is concluded from these findings, and from the fact that removal of the drainage system did not appear to increase the size of the ventricles, that shunt independence in these children did not result in diminished intelligence. Etat mental et dimension ventriculaire dans les hydrocéphalies stabilisées La mesure du diamètre du système ventriculaire chez 29 sujets avec hydrocéphalic stabilisée, devenus autonomes de shunts, a montré que l'élargissement des ventricules ne joue pas nécessairement un r̂ole dans l'évolution de l'hydrocéphalie, car dans de nombreux cas les ventricules étaient normaux ou tres légèrement élargis. Une étude a été faite de la relation existant entre la dimension ventriculaire et Intelligence. En général, les enfants avec les plus bas QI avaient un système ventriculaire très élargi tandis que celui‐ci était de taille normale dans les cas de QI élevé; cependant, une intelligence correcte peut s'observer avec un système ventriculaire de n'importe quelle dimension. A partir de ces données et du fait que la suppression du drain décroit plus qu'elle n'accroit la taille des ventricules, les auteurs concluent que l'autonomie de shunt chez ces enfants ne risque pas de diminuer l'intelligence. Geistige Verfassung und Ventrikelgröβe bei versperrtem Hydrocephalus In einer Serie von 29 Patienten mit versperrtem Hydrocephalus, die vom Shunt unabhängig geworden waren, zeigte die Messung des Durchmessers im Ventrikelsystem, daß die Vergrößerung der Ventrikel nicht unbedingt bei der Versperrung des Hydrocephalus eine Rolle spielen muß, da in vielen Fällen die Ventrikel normal oder nur gering vergrößert waren. Uber die Beziehung zwischen der Weite der Ventrikel und der Intelligenz wurde eine Studie durchgeführt. Obwohl die Kinder mit den niedrigsten IQS gewöhnlich ein sehr weites Ventrikelsystem haben, die mit den höchsten IQS ein Ventrikelsystem von normaler Größe, kann die Intelligenz doch bei alien Ventrikelgrößen festgestellt werden. Aus diesen Befunden und aus der Tatsache, daß die Entfernung des Drainagesystems die Ventrikel eher zu verengen als zu erweitern schien, wurde abgeleitet, daß die Shunt‐Unabhängigkeit bei diesen Kindern nicht eine Verringerung der Intelligenz bewirkte. Estado mental y tamaño ventricular en la hidrocefalia detenida La medición del diámetro del sistema ventricular en una serie de 29 pacientes con hidrocefalia detenida y que se habían convertido en independientes del shunt, mostró que el aumento de volumen de los ventriculos no juega necesariamente una parte en la detentión de la hidrocefalia, ya que en muchos de estos casos los ventriculos eran normales o solo ligeramente aumentados. Se estudió la relacion entre la anchura ventricular y la inteligencia. Aunque los niños con c.i. más bajo generalmente tenian un sistema ventricular muy grande y los de c.i. más alto poseian un sistema ventricular de tamaño normal, la inteligencia era compatible con cualquier tamaño ventricular. Se concluye de estos hallazgos y del hecho de que al eliminar el sistema de drenaje disminuía más bien que aumentaba el tamaño de los ventriculos, que la independencia del shunt en estos niños no daba lugar a una inteligencia disminuida. Copyrigh

Parsimonious Kernel Fisher Discrimination

By applying recent results in optimization transfer, a new algorithm for kernel Fisher Discriminant Analysis is provided that makes use of a non-smooth penalty on the coefficients to provide a parsimonious solution. The algorithm is simple, easily programmed and is shown to perform as well as or better than a number of leading machine learning algorithms on a substantial benchmark. It is then applied to a set of extreme small-sample-size problems in virtual screening where it is found to be less accurate than a currently leading approach but is still comparable in a number of cases

A Modular Toolkit for Distributed Interactions

We discuss the design, architecture, and implementation of a toolkit which supports some theories for distributed interactions. The main design principles of our architecture are flexibility and modularity. Our main goal is to provide an easily extensible workbench to encompass current algorithms and incorporate future developments of the theories. With the help of some examples, we illustrate the main features of our toolkit.Comment: In Proceedings PLACES 2010, arXiv:1110.385

Compatibility between entomopathogenic fungi and biorational insecticides in toxicity against Ronderosia bergi under laboratory conditions

Our aim was to evaluate the efficacy of combinations between two biorational insecticides (luphenuron, methoxyfenozide), a new synthetic chemical pesticide (rynaxypyr), and three entomopathogenic fungi strains (Beauveria bassianaLPSc 1067, LPSc1082), and Metarhizium anisopliae (LPSc 907) in the biocontrol of the pest grasshopper Ronderosia bergi (Stål) under laboratory conditions. The insecticides were tested at three concentrations: the average concentration recommended for application in the field (100%) and 50% and finally 25% of that level. The fungal strains used were adjusted to 1×108, 1×106, and 1×104conidia ml-1. The combinations of those insecticides with B. bassiana (LPSc 1067, LPSc 1082) and M. anisopliae (LPSc 907) caused higher mortality to R. bergi nymphs than any of the individual agents used alone. The three insecticides tested did not affect the isolates of the two species of entomopathogenic fungi employed. In conclusion, the use of these biorational insecticides in an IPM program aimed at control of the grasshopper R. bergicould be of value