Die Berechnung von Wasserfluten. Tideforschung in den Niederlanden, 1920–1960

In the first half of this century a computing problem became evident in the course of preparatory research for major hydraulic projects in the Netherlands. One of the most novel problems was to predict the changes in the tidal movements caused by hydraulic works in coastal waters. Between 1920 and 1960 several solutions were proposed and put into practice: numerical methods, contracting young men for the calculations, analogue electronical networks and large scale models. The amount of computing labour played a decisive part in the choice between these methods. After a storm surge in 1953 causing estensive inundations in the southern part of The Netherlands, the requirements of the Delta Works project gave an enormous impetus to all three types of methods.     

Spatial Moving Behavior of Two-Earner Households

Economic theory suggests that job choice, residential choice and commuting behavior are simultaneously determined. The case of two-earner households deserves special attention because the two wage earners share a dwelling but have different workplaces. We base our analysis of spatial moving behavior on search theory. We demonstrate that job mobility depends positively on the distance between the workplaces of the two wage earners. Residential mobility seems to be negatively influenced by the distance between the workplaces of the two wage earners. The search model also indicates that two-earner households will, on average, move less often than single wage earners.     

Reviews of books

Historia, utopía y ficción de la Ciudad de los Césares. Metamorfosis de un mito. Por FERNANDO AINSA. Madrid: Alianza Editorial, 1992. Pp. 120.

Cultural Diffusion of Spanish Humanism in New Spain: Francisco Cervantes de Salazar's ‘Diálogo de la dignidad del hombre.’ By DIANNE M. BONO. New York: Peter Lang, 1991. Pp. 161.

Soldiers of the Virgin: The Moral Economy of a Colonial Maya Rebellion. By KEVIN GOSNER. Tucson: University of Arizona Press, 1992. Pp. xiv, 227.

La crisis del orden colonial. Estructura agraria y rebeliones populares de la Nueva España, 1750–1821. By ERIC VAN YOUNG. México: Alianza Editorial, 1992. Pp. 515.

Esthetic Recognition of Ancient Amerindian Art. By GEORGE KUBLER. New Haven: Yale University Press, 1991. Pp. xvii, 276.

Books of the Brave: Being an Account of Books and of Men in the Spanish Conquest and Settlement of the Sixteenth‐Century New World. By IRVING A. LEONARD. Introduced by ROLENA ADORNO. Berkeley: University of California Press, 1992. Pp. xlvii, 453.

Family and Frontier in Colonial Brazil: Santana de Parnaíba, 1580–1822. By ALIDA C. METCALF. Berkeley: University of California Press, 1992. Pp. xvi, 280.

Los naufragios. By ALVAR NUÑEZ CABEZA DE VACA. Edición crítica de ENRIQUE PUPO‐WALKER. Madrid: Castalia, 1992. Pp. 334.

Estudios de literatura hispanoamericana. Sor Juana Inés de la Cruz y otros poetas barrocos de la colonia. By GEORGINA SABAT‐RIVERS. Barcelona: PPU, 1992. Pp. 355.

Vida i sucesos de la monja alférez. Autobiografía atribuida a Doña Catalina de Erauso. Edición, introducción y notas de RIMA DE VALLBONA. Tempe: Center for Latin American Studies, Arizona State University, 1992. Pp. 236.     

Laws,People and Land Use: A Sociological Perspective on the Relation Between Laws and Land Use

Public policy is often implemented through formal laws. In contrast to the typically optimistic ex-ante analyses of the impact of a set of laws, in retrospect it may be hard to determine what the laws concretely produced. Particularly complicated to measure are the unintended and indirect effects on actors or values that were not the prime focus of the law. Despite the literature on these matters in other fields of research, among planners the theory of law implementation receives relatively little attention. This attitude may stem from the means-ends rationality that has been common to planning for so many years. This paper makes a plea for focusing on the interaction between people and laws so as to understand the outcomes. We do this by drawing insights from sociological perspectives on laws.     

Hydrogeochemical modelling of CO2 equilibria and mass transfer induced by organic–inorganic interactions in siliciclastic petroleum reservoirs

Different feldspar types control complex hydrogeochemical processes in hydrocarbon‐bearing siliciclastic reservoirs, which have undergone different degrees of degradation. To test such processes generically, carbon dioxide equilibria and mass transfers induced by organic–inorganic interactions have been modelled for different hydrogeochemical scenarios. The approach is based on and compared with data from the Norwegian continental shelf ( Smith & Ehrenberg 1989 ) and assumes local thermodynamic equilibrium among solids and fluids. Equilibrating mineral assemblages (different feldspar types, quartz, kaolinite, calcite) are based on the primary reservoir composition. Equilibration and coupled mass transfer were triggered by the addition and reaction of different amounts of CO₂, CH₄ and H₂ (plus acetic acid) at temperatures between 50 and 95°C (323 and 368 K). These components occur in oil fields as products of anaerobic bacterial degradation, hydrolytic disproportionation of hydrocarbons and/or thermal maturation of kerogen. We apply two different computer codes and two different thermodynamic data bases to calculate the results. Reaction of 0.32–0.6 mol CO₂, 0.16–0.3 mol CH₄ and 0.8–1.5 mol H₂ with K‐feldspar, quartz, kaolinite and calcite in 1 l of pore water results in modelled values of 0.3–2.3 mol% CO₂ in a multicomponent gas phase that resembles measured data (0.2–1.5 mol%). Similar CO₂ contents result from acetic acid addition (CO₂, CH₄, H₂ + 0.016 mol CH₃COOH). Equilibration with albite or anorthite reduces the release of CO₂ into the multicomponent gas phase dramatically, by 1 or 4 orders of magnitude compared with the equilibration with K‐feldspar. Minor differences in the modelled CO₂ content (0.1–0.2 mol%) result from calculations with different computer codes if the same thermodynamic data base is applied. Relevant differences (up to 1.9 mol% CO₂) result from calculations using different thermodynamic data bases.     

Leaving the War Popular Violence and Judicial Repression of ‘unpatriotic’ behaviour in Belgium (1918–1921)

After four years of occupation, Belgium emerged ruined at the end of the Great War. The King returned from Yser, leading the army and acclaimed by the population. In contrast, the government and the exiles came back discreetly and the absence of the dead was felt strongly. Part of the population felt itself to be the victim of the occupation and sought revenge: shop windows were broken and houses sacked, men were molested and women's heads shaven. Manufacturers who had closed their businesses sought the severe repression of those who had pursued their activities. Journalists who had stopped writing called for harsh treatment of the newspapers that submitted to German censorship. A fraction of the population stigmatised those who profited from the occupation and demanded justice. In 1918, Belgium was already confronted with problems that most European countries only discovered at the end of the Second World War. How does one move on from a war of occupation? How does one reconstruct a state weakened by occupation? How does one handle collective vengeance and respond to calls for justice? This article will study successively the wave of ‘popular’ violence accompanying the country's liberation in November and December 1918 and the state's answer through the judiciary repression of collaboration with the enemy conducted between 1919 and 1921, mainly by military and civil tribunals.     

Navigational Equipment from 't Vliegend Hart (1735)

The Dutch United East-India Company ship 't Vliegend Hart sank in the mouth of the River Scheldt in 1735. With archival sources the wreck was located in 1979, and in the following years researched and excavated, a process still continuing. This article gives a brief historical introduction on the ship, followed by a paragraph on the art of navigation and navigational instruments at the time of 't Vliegend Hart 's sailing. Thereafter this is compared with the navigational artefacts retrieved from the wreck. In the final paragraph the exploration of the 't Vliegend Hart wreck is briefly dealt with.
© 2006 The Authors     

Juhn A. Wada and the sodium amytal test in the first (and last?) 50 years

Fifty years ago Juhn A. Wada developed the intracarotid amobarbital procedure (IAP), a test in which first one and then the other cerebral hemisphere is temporarily anaesthetised through direct intracarotid application of sodium amytal. The IAP was devised initially as a method to allow unilateral electroconvulsive shock therapy for psychosis. The method subsequently proved its value for the lateralisation of language and, following adaption of the test protocol, for the assessment of memory functions. Thus the IAP became the standard test in the presurgical evaluation for resective surgical treatment of medically intractable epilepsy. This paper will briefly review the history of the IAP, the controversies concerning its current applications and its expected eventual replacement by less invasive and more easily repeatable methods, notably functional magnetic resonance imaging.