Modelling potential movement in constrained travel environments using rough space-time prisms

The widespread adoption of location-aware technologies (LATs) has afforded analysts new opportunities for efficiently collecting trajectory data of moving individuals. These technologies enable measuring trajectories as a finite sample set of time-stamped locations. The uncertainty related to both finite sampling and measurement errors makes it often difficult to reconstruct and represent a trajectory followed by an individual in space-time. Time geography offers an interesting framework to deal with the potential path of an individual in between two sample locations. Although this potential path may be easily delineated for travels along networks, this will be less straightforward for more nonnetwork-constrained environments. Current models, however, have mostly concentrated on network environments on the one hand and do not account for the spatiotemporal uncertainties of input data on the other hand. This article simultaneously addresses both issues by developing a novel methodology to capture potential movement between uncertain space-time points in obstacle-constrained travel environments

A GIS toolkit for measuring and mapping space-time accessibility from a place-based perspective

This article introduces a novel geographical information system toolkit for measuring and mapping the accessibility of individuals to services. The toolkit contributes to earlier implementations by combining aspects of both place-based and person-based accessibility measures. To this end, place-based accessibility measures are derived from a person-based framework by considering space-time prisms that are centred at service facilities rather than individual anchor points. The implementation is also innovative by explicitly accounting for the opening hours of service delivery in its accessibility measurement. In addition, the toolkit is aimed to be user-friendly and to generate insightful and comprehensible results for non-technically oriented users, which is illustrated in a brief case study about library accessibility in Ghent (Belgium)

Toolkit bekijkt ruimtelijke én temporele bereikbaarheid : nieuwe toolkit PrismMapper van UGent

Bereikbaarheid houdt meer in dan enkel een verplaatsing van A naar B. Ze omvat ook de tijdsbeschikbaarheid van het individu en wat hij of zij wil bereiken. Studies over de bereikbaarheid van openbare voorzieningen, zoals een bibliotheek of gemeentedienst, gaan vaak ten onrechte aan dit aspect voorbij. Een toolkit die ontwikkeld werd aan de Universiteit Gent, kan de hiaten in bereikbaarheidsanalyse opvullen

Secure boot concept on the Zynq Ultrascale+ MPSoC

The complexity of today's multiprocessor System-on-Chip (MPSoC) can lead to major security risks in embedded designs, as the available security functions are often not or insufficiently utilized.This presentation demonstrates a concept of a secure boot and runtime system on a Xilinx Zynq Ultrascale+ to prevent potential hacker attacks. The security concept is matched with dedicated on-chip security features like AES core, RSA core and hashing core. It also includes monitoring of environmental parameters such as voltage and temperature to detect tampering and prevent disclosure of data. In addition, secure key storage and various methods for minimizing key consumption are discussed. Finally, the talk covers the ARM TrustZone technology and the use of OP-TEE as a secure operating system