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van Langelaar, CM (author), van der Spek, S.C. (author)There are basically two kinds of city centres: historic and modern. Historic city centres, built in an era when no cars existed, tend to be very walkable environments. Modern cities, however, are much more car-dominated, leading to a less attractive walking environment. Rotterdam is one of the four main cities in the Netherlands and its historic...book chapter 2016
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- van der Spek, S.C. (author) conference paper 2002
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van der Wegen, M. (author), Guo, J. (author), Jaffe, B.E. (author), van der Spek, A.J.F. (author), Roelvink, J.A. (author)Levees are small elevation ridges found on the edge between channels and shoals. They are known to develop along river channels during floods and along channels in alluvial deep water fans. Levees in tidal environments such as the Waddenzee are less pronounced (with a typical height in the order of 10 cm) and may be recognized by the fact that...conference paper 2012
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Oliveti, M (author), van der Spek, S.C. (author), Quak, C.W. (author)With the help of technologies such as GPS tracks, GIS and open data is now possible to study people travel behaviour in a new way. Nowadays, large datasets can be easily handled thanks to databases and better visualized using GIS. Moreover, the availability of GPS data, open data and VGI makes accessible a lot of new information, which was not...conference paper 2016
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van der Spek, S.C. (author), Verbree, E. (author), Bon, M. (author), den Duijn, X.A. (author), Dukai, B. (author), Griffioen, S.J. (author), Kang, Y (author), Vermeer, M. (author)The distribution of people in buildings, the occupancy of lecture-, work- and study places and the accessibility of facilities are essential information at university campuses who have to cope with limited and even shrinking budgets and huge, rising real estate costs. Only little insight is gained in both occupancy and movement patterns with...conference paper 2016
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van der Spek, S.C. (author), Verbree, E. (author), Meijers, B.M. (author), Bot, F.J. (author), Braaksma, H.H. (author), Braggaar, R.C. (author), Ligtvoet, B.R. (author), Staats, B.R. (author)The distribution of people in buildings, the occupancy of lecture-, work- and study places and the accessibility of facilities are essential information at university campuses who have to cope with limited and even shrinking budgets and huge, rising real estate costs. Only little insight is gained in both occupancy and movement patterns with...conference paper 2016
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van der Spek, S.C. (author), Verbree, E. (author), Quak, C.W. (author), Groeneveld, IJ.D.G. (author), Sulzer, R. (author), Theocharous, E. (author), Tryfona, M.S. (author), Willems, O.T. (author), Xu, Y. (author)The distribution of people in buildings, the occupancy of lecture-, work- and study places and the accessibility of facilities are essential information at university campuses who have to cope with limited and even shrinking budgets and huge, rising real estate costs. Only little insight is gained in both occupancy and movement patterns with...conference paper 2016
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Angelova, Lilia (author), Flikweert, P.L.M. (author), Karydakis, Panagiotis (author), Kersbergen, Daniël (author), Teeuwen, Roos (author), Valečkaitė, K. (author), Verbree, E. (author), Meijers, B.M. (author), van der Spek, S.C. (author)Along with the rise of the smart city movement, Internet of Things is an upcoming phenomenon. Objects and devices are becoming more and more wirelessly interconnected, communicating information between themselves and to human beings. As an addition to static sensor networks that gather real-time environmental data, the feasibility of...conference paper 2018
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Griffioen, Simon (author), Vermeer, Martijn (author), Dukai, Balázs (author), van der Spek, S.C. (author), Verbree, E. (author)Knowledge of people's locations and related mobility patterns are important for many decision-making processes. How to efficiently use the available space, is a common problem in many fields. Wireless Local Area Networks (WLAN) are widely used for locating mobile devices within this network. This study attempts to identify movement from Wi-Fi...conference paper 2017
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Wijnberg, Kathelijne (author), van der Spek, Ad (author), Galiforni-Silva, Filipe (author), Elias, Edwin P.L. (author), van der Wegen, Mick (author), Slinger, J (author)Potential transport pathways between the subtidal and subaerial part of tidal inlet systems are explored by means of a case study of Texel Inlet, The Netherlands. Based on a morphologic analysis of multi-annual, high-resolution bathymetric and topographic data sets we hypothesize that two mechanisms connect the subtidal and subaerial parts of...conference paper 2017
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- Lascaris, R. (author), Bussemaker, H.J. (author), Boorsma, A. (author), Piper, M. (author), van der Spek, H. (author), Grivell, L. (author), Blom, J. (author) journal article 2002
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Elias, Edwin P.L. (author), Pearson, S.G. (author), van der Spek, A.J.F. (author), Pluis, Stefan (author)For successful and sustainable management of barrier islands, a thorough understanding of the ebb-tidal delta dynamics and interactions with the adjacent shorelines are of the utmost importance. Such understanding requires detailed observations and interpretations of the morphodynamics of smaller-scale features such as the individual channels...journal article 2022
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Pearson, S.G. (author), Elias, Edwin (author), van Prooijen, Bram (author), van der Vegt, H. (author), van der Spek, A.J.F. (author), Wang, Zhengbing (author)Ebb tidal deltas (ETDs) are highly dynamic features of sandy coastal systems, and coastal management concerns (e.g., nourishment and navigation) present a pressing need to better describe and quantify their evolution. Here we propose two techniques for leveraging the availability of high-resolution bathymetric surveys to generate new insights...journal article 2022
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Erturan Topgül, G.A. (author), van der Spek, S.C. (author)This study seeks answers to the research question ‘How can walkability of urban spaces be analysed with a multidimensional approach by using mobile methods?’ The research consists of a literature review, a field study in the city centre of Delft conducted as Go-Along walks, which provide better insight in capturing the experience of walking...journal article 2021
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Lodder, Q.J. (author), Wang, Zhengbing (author), Elias, Edwin P.L. (author), van der Spek, A.J.F. (author), de Looff, Harry (author), Townend, Ian (author)Climate change, and especially the associated acceleration of sea-level rise, forms a serious threat to the Wadden Sea. The Wadden Sea contains the world’s largest coherent intertidal flat area and it is known that these flats can drown when the rate of sea-level rise exceeds a critical limit. As a result, the intertidal flats would then be...journal article 2019
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Ranacher, P. (author), Brunauer, R. (author), Trutschnig, W (author), van der Spek, S.C. (author), Reich, S (author)Global navigation satellite systems such as the Global Positioning System (GPS) is one of the most important sensors for movement analysis. GPS is widely used to record the trajectories of vehicles, animals and human beings. However, all GPS movement data are affected by both measurement and interpolation errors. In this article we show that...journal article 2016
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van der Spek, S.C. (author), Oliveti, M. (author)Managing urban areas has become one of the most important development challenges of the 21st century. Building sustainable cities is a major factor nowadays. In this context, the advent of technologies such as GPS (Global Positioning System) and GIS (Geographical Information Systems) enables to better address the relationship between urban form...journal article 2017
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Elmilady, H.M.S.M.A. (author), van der Wegen, M. (author), Roelvink, D. (author), van der Spek, A. (author)Intertidal shoals are key features of estuarine environments worldwide. Climate change poses questions regarding the sustainability of intertidal areas under sea-level rise (SLR). Our work investigates the SLR impact on the long-term morphological evolution of unvegetated intertidal sandy shoals in a constrained channel-shoal system....journal article 2022
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Stam, Bas (author), van Oort, N. (author), van Strijp-Harms, Hilke J. (author), van der Spek, S.C. (author), Hoogendoorn, S.P. (author)First/last mile transport is essential for transit but is often found to be the weakest link in a trip. Moreover, as a result of multiple developments (e.g. demographic shifts, urbanization, climate change, technology advancement) first/last mile transport will likely change rapidly. The literature review of this study shows six different...journal article 2021
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Huismans, Y. (author), van der Spek, A.J.F. (author), Lodder, Q.J. (author), Zijlstra, Robert (author), Elias, Edwin (author), Wang, Zhengbing (author)The Wadden Sea is a unique intertidal wetland area, forming an important hub for migratory water birds. A feared effect of accelerated sea-level rise (SLR) is the gradual loss or even disappearance of the ecologically valuable intertidal flats. To date, the effect of SLR on the time-evolution of the intertidal areas in the Dutch Wadden Sea...journal article 2022