De Vorstinnen van het Huis van Oranje-Nassau /

U.W. copy imperfect: p.321.328 bound in between p.312 and 313.

Catalogus van eenige der merkwaardigste zoo in-als uit-heemsche gewassen, te vinden in 's lands plantentuin te Buitenzorg /

Photolithographed by the Murray Printing Co., Cambridge, Mass. for the Arnold Arboretum, 1946.

Jacob van Maerlant : bekroonde verhandeling in den letterkundigen wedstryd /

Mode of access: Internet.

Een vergeten hoofdstuk. Blanke slaven. Supplement op het historisch gedenkboek "Eene Halve eeuw," 1848-1898 /

Mode of access: Internet.

Kilmacolm : a parish history, 1100-1898 /

Mode of access: Internet.

Annales des travaux publics de Belgique. Tijdschrift der openbare werken van België.

Title varies slightly.

View from Engineering Shops Tower before 1898

Ware and Van Brunt, architect. An addition was built to the south in 1898. The 1883 portion was torn down in 1918.

Onze jongens van 1798 : (uit de herinneringen van een Vlaamschen brigand /

Mode of access: Internet.

Adriaen van de Venne /

Catalog.

Het geslacht Cyperus (sensu amplo) in den Maleischen Archipel benevens een overzicht van de geschiedenis der systematiek van de familie der cyperaceen

Proefschrift--Leiden.

Diagramas de Ellingham e de Van't Hoff: algumas considerações

The main subject of this article is to show the parallelism betwen the Ellingham and Van't Hoff diagrams. The first one is a graphic representation of the changes in the standard Gibbs free energy (deltarGtheta) as a function of T and was introduced by Ellingham in 1944, in order to study metallurgic processes involving oxides and sulphides. On the other hand, the Van't Hoff diagram is a representation of the function ln K versus (1/T). The equivalence between both diagrams is easily demonstrated, making simple mathematical manipulations. In order to show the parallelism between both diagrams, they are presented briefly and two examples are discussed. The comparison of the both diagrams surely will be helpful to students and teachers in their learning and teaching activities, and will certainly enrich important aspects of chemical thermodynamics.

Alternative Analytical Expressions for the General van Genuchten-Mualem and van Genuchten-Burdine Hydraulic Conductivity Models

The van Genuchten expressions for the unsaturated soil hydraulic properties, first published in 1980, are used frequently in various vadose zone flow and transport applications assuming a specific relationship between the m and n soil hydraulic parameters. By comparison, probably because of the complexity of the hydraulic conductivity equations, the more general solutions with independent m and n values are rarely used. We expressed the general van Genuchten-Mualem and van Genuchten-Burdine hydraulic conductivity equations in terms of hypergeometric functions, which can be approximated by infinite series that converge rapidly for relatively large values of the van Genuchten-Mualem parameter n but only very slowly when n is close to one. Alternative equations were derived that provide very close approximations of the analytical results. The newly proposed equations allow the use of independent values of the parameters m and n in the soil water retention model of van Genuchten for subsequent prediction of the van Genuchten-Mualem and van Genuchten-Burdine hydraulic conductivity models, thus providing more flexibility in fitting experimental pressure-head-dependent water content, theta(h), and hydraulic conductivity, K(h), or K(theta) data.

Modeling of transpiration reduction in van Genuchten-Mualem type soils

We derive an analytic expression for the matric flux potential (M) for van Genuchten-Mualem (VGM) type soils which can also be written in terms of a converging infinite series. Considering the first four terms of this series, the accuracy of the approximation was verified by comparing it to values of M estimated by numerical finite difference integration. Using values of the parameters for three soils from different texture classes, the proposed four-term approximation showed an almost perfect match with the numerical solution, except for effective saturations higher than 0.9. Including more terms reduced the discrepancy but also increased the complexity of the equation. The four-term equation can be used for most applications. Cases with special interest in nearly saturated soils should include more terms from the infinite series. A transpiration reduction function for use with the VGM equations is derived by combining the derived expression for M with a root water extraction model. The shape of the resulting reduction function and its dependency on the derivative of the soil hydraulic diffusivity D with respect to the soil water content theta is discussed. Positive and negative values of dD/d theta yield concave and convex or S-shaped reduction functions, respectively. On the basis of three data sets, the hydraulic properties of virtually all soils yield concave reduction curves. Such curves based solely on soil hydraulic properties do not account for the complex interactions between shoot growth, root growth, and water availability.

The Conditional Autonomy of Tafuri's Historian / De Provisorische Autonomie van de Historicus bij Tafuri

This article considers the conditions placed on the autonomous architectural history discipline often understood at stake in Manfredo Tafuri's 1968 book Teorie e storia dell'architettura.