172,599 research outputs found
Minimum MSE estimation of a regression model with fixed effects from a series of cross sections (Revised version)
No full textEstimation
William Verbeek P[ost] M[aster} ? Received $1.32 for Postage Evidently for Several Periodicals That Rev. Albertus C. Van Raalte Received
No full textWilliam Verbeek P[ost] M[aster} ? received $1.32 for postage evidently for several periodicals that Rev. Albertus C. Van Raalte received. The publications were: New York Observer, Christian Intelligencer, Prophetic Times, and Harpers Weekly.https://digitalcommons.hope.edu/vrp_1870s/1022/thumbnail.jp
Carte géologique de Java et Madoura et feuilles annexés
No full textpar Dr. R.D.M. Verbeek et R. Fennema, Ingénieurs en chef des mines des Indes néerlandaises ; publiée par ordre de Son Excellence le Gouverneur Général des Indes NéerlandaisesFranzösisch-holländisch beschriftetEnthält: A. Grande carte géologique, à l'échelle 1:200 000, en 26 feuilles et titre ; B. Carte géologique synoptique, à l'échelle 1:500 000, en 2 feuilles ; C. 22 feuilles annexésin Mapp
Reaktive Steuerung autonomer mobiler Roboter
No full textVerbeek C. Reaktive Steuerung autonomer mobiler Roboter. GMD research series ; 2001,9. Sankt Augustin: GMD-Forschungszentrum Informationstechnik; 2001
Rheology and Processing of Novatein Thermoplastic Protein
No full textBiopolymers have become suitable alternatives to petro-chemical polymers as they can biodegrade and are considered environmentally friendly. Novatein Thermoplastic Protein (NTP) is a newly developed plastic material using bovine bloodmeal. Knowledge of the rheology of NTP is required to assess processability and to optimise process design. The objective of this research was to use capillary rheometry and batch mixing to determine the rheology and processing behaviour of NTP. These were evaluated at constant plasticiser content, but using three different ratios of water to plasticiser (triethylene glycol, TEG). Each of these was evaluated at 115, 120 and 125 °C. It was shown that NTP is a non-Newtonian, shear thinning fluid with similar behaviour compared to linear low density polyethylene. It was found that viscosity is highly dependent on water content; decreasing with increasing water content. At a shear rate of 15 s-1, the apparent viscosity for the standard formulation (60 parts water per hundred parts bloodmeal) was 2000 Pa.s compared to 7000 Pa.s for the formulation containing 30 parts water [water (30) : TEG (30)], measured at 115 °C. Viscosity decreased slightly with increasing temperature and the degree of non-Newtonian behaviour was mostly unaffected by temperature. The flow behaviour index, n, was found to be in the range 0.11 to 0.17, with no discernable temperature dependence. In the standard formulation, the total amount of plasticiser and ratio water to TEG was higher, which resulted in different flow behaviour with respect to temperature. Batch mixing was used to determine the processing window (∆t) by monitoring torque changes over time during mixing. Processing window for standard NTP decreased from 260 to 220 seconds when the mixing speed was increased from 75 to 95 RPM. The processing window was shortened with reducing water content or an increase in temperature. At 125 °C and 95 RPM the processing window was only 67 seconds for the formulation with 30 parts water and 30 parts TEG. It was concluded that crosslinking was accelerated with an increase in shear and temperature or a reduction in moisture content. Thermal or mechanical energy activates crosslinking, while water plasticises the polymer which decreases the rate of crosslinking. Processing NTP required a delicate balance of supplying enough mechanical and thermal energy for chain rearrangement and consolidation, but preventing fast crosslinking. Crosslinking can be retarded using larger amounts of water, but excessive water may lead to problems after product moulding. Replacing water with TEG does not prevent crosslinking, but does lower the apparent viscosity during processing
Cardiovascular risk factors and subsequent disease in general practice
No full textItem does not contain fulltextKatholieke Universiteit Nijmegen, 14 september 2000Promotores : Bosch, W.J.H.M. van den, Thien, Th., Weel, C. van Co-promotores : Stalenhoef, A.F.H., Thomas, S., Verbeek, A.L.M.139 p
Human fecundity under natural conditions and during in vitro fertilization
No full textContains fulltext :
mmubn000001_237730979.pdf (Publisher’s version ) (Open Access)Promotores : G. Zielhuis, A. Verbeek, F. Gabreëls en C. Hamilton181 p
Rapports sur le mémoire de C. Bulard, D. Fries, Th. Gaspar et R. Verbeek : Acide abscissique : structure, synthèses et métabolisme
No full textBouillenne Raymond Léon Eugène, Homès-Van Schoor Germaine, Lebrun Jean. Rapports sur le mémoire de C. Bulard, D. Fries, Th. Gaspar et R. Verbeek : Acide abscissique : structure, synthèses et métabolisme . In: Bulletin de la Classe des sciences, tome 58, 1972. pp. 555-557
Recent Advances in Smellscape Research for the Built Environment
No full textThe interrelationships between humans, smells and the built environment have been the focus of increasing numbers of research studies in the past ten years. This paper reviews these trends and identifies the challenges in smellscape research from three aspects: methodological approaches, artistic design interventions and museum practices, and odour policy making. In response to the gaps and challenges identified, three areas of future research have also been identified for this field: smell archives and databases, social justice within odour control and management, and research into advanced building materials. [Abstract copyright: Copyright © 2021 Xiao, Aletta, Radicchi, McLean, Shiner and Verbeek.
Two-step estimation of panel data models with censored endogenous variables and selection bias.
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