High-level consumer services in polycentric urban regions - hospital care and higher education between duplication and complementarity

In many European countries, territorial development strategies identify the development potential of so-called polycentric urban regions: regions in which a multitude of more or less similar-sized, formerly independent and distinct cities are located close to each other and among which functional relationships seem to be on the increase. Often, such polycentric urban regions are referred to using metaphors as city networks or urban networks. Well-known examples are the Randstad and Brabantstad in the Netherlands and the Flemish Diamond in Belgium. Taken together, the cities of such a region would provide for more critical mass and more agglomeration economies so that the region can compete on a higher level. In order to exploit the potentialities of such regions, often co-operation links have been forged between the cities. From a geographical perspective, applying the network metaphor to such a regional collection of cities seems only appropriate when the regional spatial structure corresponds to what has been labelled as the ‘Network Model’ (Batten, 1995; Van der Knaap, 2002). It could be argued that the presence of a networked spatial structure is necessary for a polycentric urban region to be more than just a collection of cities. One of the defining characteristics of the network model is that the cities, or the activities and places within them, should complement each other. The paper addresses this issue of complementarity in polycentric urban regions, focussing on the regional structure of urban facilities such as hospital care, higher education and the cultural sector in Dutch polycentric urban regions. The paper will demonstrate how spatially relevant decisions taken within these micro-sectors alter, on a macro-level, the spatial structure of the polycentric urban region. The question is whether these lead to less duplication and, through differentiation, to a higher extent of complementarity. In other words, are polycentric urban regions as the Randstad turning into urban networks?

Safe and smooth through a shallow fairway

Since the ever growing dimensions of all vessel types coming to the Flemish harbours which started in the mid 80’s of last century, the research at Flanders Hydraulics Research, a laboratory belonging to the Flemish Government, concerning harbour infrastructure and fairways was shifting from structural based examinations to ship related examinations. The key question was and is: how can an existing or new-built ship access the shallow water areas in Belgium safely and smoothly? With the installation of the first ship manoeuvring simulator in 1989 and the Towing Tank for Manoeuvres in Shallow water (co-operation Flanders Hydraulics Research- Ghent University) in 1992 fundamental and applied research studies followed successively. In May 2008 this joint work resulted in the Knowledge Centre Manoeuvring in Shallow and Confined Water (www.shallowwater.be) established to fix, extend and provide the scientific know-how on the behaviour of vessels in shallow and confined navigation areas. The presentation will give an overview of the latest fundamental researches executed at FHR and UGent concerning the influence of shallow water manoeuvring, bank effects and ship-ship interaction. Based on model tests with scale models of about 4 m length forces have been measured and the influence of different test parameters have been examined. Combining these measurements with mathematical models incorporated in the simulators gives the opportunity to evaluate new situations together with the pilots of the Flemish Pilotage. This research has been used to evaluate the accessibility of the largest containerships (the E-type vessel of Maersk Sealand and the 366 m vessels of other shipping companies as MSC and CMA-CGM) to the port of Antwerp and the port of Zeebrugge and the largest LNG carriers to the LNG terminal in Zeebrugge. New limits have been examined for the West lock in Terneuzen for Kamsarmax vessels where the useful width of 38 m for the lock is compared with the vessel’s beam of 37 m. This high blockage introduces lock effects that determines the behaviour entering the lock

On the impossibility of inferring cohort fertility measures from period fertility measures

A particularly important struggle faced by demographic analysts is, how to arrive at statements about family formation processes from a cohort perspective from data that are essentially collected on an annual basis. The present paper is concerned with this struggle, mostly restricted to the case of fertility. The central question investigated here is: given observed period data, what can we conclude about the completed family size of real women? I review several existing methods to infer cohort fertility from period fertility measures. The conclusion is that, for each method, its justifiability can be verified only empirically: by looking at cohort fertility directly. To illustrate how this can be done, the paper analyses fertility data from a cohort perspective for two countries, Italy and the Netherlands.cohort fertility, demographic transition, fertility, Italy, Netherlands, period adjustment, tempo and quantum, total fertility rate

Film documentary : nodding syndrome: an illness in the making

This film documentary is based on fifteen months of anthropological fieldwork in northern Uganda and shows the complexity of nodding syndrome and the many different narratives, explanatory models and coping styles regarding this affliction. In attempting to understand what nodding syndrome is and how it is experienced, we should look at the context in which meaning making takes place

A critical analysis of the X.400 model of message handling systems

The CCITT X.400 model of store and forward Message Handling Systems (MHS) serves as a common basis for the definition of electronic mail services and protocols both within CCITT and ISO. This paper presents an analysis of this model and its related recommendations from two perspectives. First the concepts of service, protocol and interface are discussed together with their application to this model; second the positioning within ISO's reference model for Open Systems Interconnection (OSI) is commented on

Controlling the yawing of an Aframax tanker during a lightering manoeuvre

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