Detecting and Analyzing Urban Centers Based on the Localized Contour Tree Method Using Taxi Trajectory Data: A Case Study of Shanghai

Urban structure is of vital importance to urban planning, transportation, economics and other applications. Since detecting and analyzing urban centers is crucial for understanding urban structure, a large number of studies on urban center extraction have been performed. In this paper, we propose an analysis framework to identify urban centers by using taxi trajectory data. The proposed approach differs from previous methods by employing a novel way to simulate taxi trajectory data with the topographic surface. We extracted pick-up and drop-off spots from taxi trajectory data and employed the localized contour tree method to delineate the boundaries and hierarchies of urban centers. The experiments show that the proposed method can successfully detect urban centers and analyze their temporal patterns in different periods in Shanghai, China.

Digital Literacy

Information and communication technologies (ICT) along with the internet have fueled advancements and growth in banking, transportation, economics, and most of all in education in the 21st century. The 21st century citizens are provided with new opportunities that have been created with the advancement of ICT. Hence, individuals need a wide range of abilities, competencies, and skills to adapt to the technological era. This paper provides a literature review of the growing importance of ICT, its wide array of usage, and its influence on various facets of people's daily lives. In addition, the emerging concept of digital literacy through ICT developments, contribution of digital literacy towards the achievement of sustainable development goals, contribution of ICT towards the development of various sectors particularly the education sector, and the work done in this area of digital literacy are summarised. The paper concludes with three new models of digital literacy: four gear model, model for flexible learning, and a model showing the impact of ICT on the learning process.

Where We Walk Is What We See: Foundational Concepts and Analytical Techniques of Space Syntax

The most difficult issue in writing a methods paper on Space Syntax is that it is not simply a method. It is a theory on which a methodology has been built. In the 40 years since introduction, both its theory and its methods have advanced, including the creation and development of computerized software. Essentially Space Syntax investigates layouts, seen in plan drawings; but this is done from mature theoretical arguments about function in those spaces. While theories of society were at the genesis of Space Syntax, it has branched into cognition, transportation, economics, and so on, and has been used to investigate buildings, cities, and regions. In the last decade or so, Space Syntax has been used in different ways to investigate healthcare facilities. This article concentrates on explaining the analytical techniques of Space Syntax. The theoretical underpinnings are minimally described—just enough for the reader to understand the basis of the methods. All examples provided are based on the same hypothetical hospital floor layout for ease of comprehension and comparison. Also, all Space Syntax concepts are italicized for identification. Since the theoretical aspects are not treated in detail, the reader is advised to pay particular attention to the citations for advanced comprehension. This cannot be overemphasized.