- 24 MayProf. Kas Oosterhuis lectures at Polypodium (Beirut Design Week)
- 07 MayDr. Nimish Biloria to serve as a Panelist at the Trans-Arch-Edu-03, Izmir, Turkey
- 20 AprDr Nimish Biloria and PhD candidate Jia Rey Chang publish paper on Swarm Scapes in Springer's Lecture Notes in Computer Science
- 20 AprAlex Liu Cheng and Henriette Bier publish paper on An Extended Ambient Intelligence Implementation for Enhanced Human-Space Interaction
- 20 AprTextrinium exhibited at Center for European Textile Innovation (CETI)
- 18 AprDr. Nimish Biloria appointed as the Scientific Committee member for the ACADIA 2016-Posthuman Frontiers conference, USA.
- 13 AprDr.-Ing. Henriette Bier and PhD-cand. Sina Mostafavi speak at 3rd Digital Knowledge Study Day addressing the question Robots and/or Architecture?
- 14 MarSina Mostafavi and Henriette Bier publish paper on D2RP in Springer's Rob|Arch 2016.
- 17 Feb Prof. Kas Oosterhuis will lecture at The Royal Flemmish Academy of Belgium for Science and the Arts on Wednesday 17th February at 14:30
- 01 Feb1-3 February Henriette Bier is distinguished visiting scientist in Digital Ecologies at IMSE
Achilleas Psyllidis is defending his PhD dissertation on November 17, 2016 at 12:30h
Achilleas Psyllidis is defending his PhD dissertation titled:
"Revisiting Urban Dynamics through Social Urban Data: Methods and tools for data integration, visualization, and exploratory analysis to understand the spatiotemporal dynamics of human activity in cities".
The defense will take place on Thursday, November 17, 2016 at 12:30h in the Senaatszaal of TU Delft's Aula Conference Center (Mekelweg 5, 2628 CC, Delft). Prior to the defense, at 12:00h, he will give a brief presentation of the PhD research.
In addition, you are very welcome to join the reception that will be held directly after the defense, again at TU Delft's Aula.
Prof. ir. Kas Oosterhuis
Dr. ir. Nimish Biloria
Doctoral Committee Members:
Prof. dr. ir. Arjan van Timmeren, Delft University of Technology
Prof. dr. ir. Sevil Sariyildiz, Delft University of Technology
Prof. dr. ir. Arnold Bregt, Wageningen University
Prof. dr. Liesbet van Zoonen, Erasmus University Rotterdam
Dr. Clio Andris, Pennsylvania State University
The study of dynamic spatial and social phenomena in cities has evolved rapidly in the recent years, yielding new insights into urban dynamics. This evolution is strongly related to the emergence of new sources of data for cities (e.g. sensors, mobile phones, online social media etc.), which have potential to capture dimensions of social and geographic systems that are difficult to detect in traditional urban data (e.g. census data). However, as the available sources increase in number, the produced datasets increase in diversity. Besides heterogeneity, emerging social urban data are also characterized by multidimensionality. The latter means that the information they contain may simultaneously address spatial, social, temporal, and topical attributes of people and places. Therefore, integration and geospatial (statistical) analysis of multidimensional data remain a challenge. The question which, then, arises is how to integrate heterogeneous and multidimensional social urban data into the analysis of human activity dynamics in cities?
To address the above challenge, this thesis proposes the design of a framework of novel methods and tools for the integration, visualization, and exploratory analysis of large-scale and heterogeneous social urban data to facilitate the understanding of urban dynamics. The research focuses particularly on the spatiotemporal dynamics of human activity in cities, as inferred from different sources of social urban data. The main objective is to provide new means to enable the incorporation of heterogeneous social urban data into city analytics, and to explore the influence of emerging data sources on the understanding of cities and their dynamics.
In mitigating the various heterogeneities, a methodology for the transformation of heterogeneous data for cities into multidimensional linked urban data is, therefore, designed. The methodology follows an ontology-based data integration approach and accommodates a variety of semantic (web) and linked data technologies. A use case of data interlinkage is used as a demonstrator of the proposed methodology. The use case employs nine real-world large-scale spatiotemporal data sets from three public transportation organizations, covering the entire public transport network of the city of Athens, Greece.
To further encourage the consumption of linked urban data by planners and policy-makers, a set of web-based tools for the visual representation of ontologies and linked data is designed and developed. The tools – comprising the OSMoSys framework – provide graphical user interfaces for the visual representation, browsing, and interactive exploration of both ontologies and linked urban data.
After introducing methods and tools for data integration, visual exploration of linked urban data, and derivation of various attributes of people and places from different social urban data, it is examined how they can all be combined into a single platform. To achieve this, a novel web-based system (coined SocialGlass) for the visualization and exploratory analysis of human activity dynamics is designed. The system combines data from various geo-enabled social media (i.e. Twitter, Instagram, Sina Weibo) and LBSNs (i.e. Foursquare), sensor networks (i.e. GPS trackers, Wi-Fi cameras), and conventional socio-economic urban records, but also has the potential to employ custom datasets from other sources.
A real-world case study is used as a demonstrator of the capacities of the proposed web-based system in the study of urban dynamics. The case study explores the potential impact of a city-scale event (i.e. the Amsterdam Light festival 2015) on the activity and movement patterns of different social categories (i.e. residents, non-residents, foreign tourists), as compared to their daily and hourly routines in the periods before and after the event. The aim of the case study is twofold. First, to assess the potential and limitations of the proposed system and, second, to investigate how different sources of social urban data could influence the understanding of urban dynamics.
The contribution of this doctoral thesis is the design and development of a framework of novel methods and tools that enables the fusion of heterogeneous multidimensional data for cities. The framework could foster planners, researchers, and policy makers to capitalize on the new possibilities given by emerging social urban data. Having a deep understanding of the spatiotemporal dynamics of cities and, especially of the activity and movement behavior of people, is expected to play a crucial role in addressing the challenges of rapid urbanization. Overall, the framework proposed by this research has potential to open avenues of quantitative explorations of urban dynamics, contributing to the development of a new science of cities.