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Autonomous transit on demand are increasingly considered to become a viable substitute for taxi services. AVs can be managed through a centralized controlling system, targeting system optimization rather than user optimality. This centralized control can enable a more efficient, strictly-adhered-to parking strategy to reduce inefficient empty traveling. In this project, four different parking strategies are implemented in the AV extension of MATSim (Multi-agent transport simulation), namely demand-based roaming, parking on the street, parking in depots and a mixed strategy of parking on the street and in depots. The influence of different PT demand levels on the different parking strategies was explored, showing that the shared system is robust to varying levels of demand, and that the different parking strategies trade off user convenience for operational cost. The road parking strategy appears to be the best for consolidating rides into larger vehicles, especially for the increased demand scenario., Procedia Computer Science, 151, ISSN:1877-0509

My oogmerk is om mediatiseringsteorie in teenstelling tot effekteorie en die effekparadigma in medianavorsing as ʼn ontwikkeling en uitvloeisel van die nuwe digitale medialandskap te bespreek. Sewe generiese kenmerke van die nuwe medialandskap word geïdentifiseer en in breë trekke geskets: die diversiteit van ʼn eindelose stroom van inhoud, vorm en aanbieding, ʼn geïntegreerde en gekonvergeerde media-industrie, ʼn geïntegreerde regulatoriese model, meer en verbeterde toegang tot die media, die verskuiwing van massakommunikasie na netwerkkommunikasie, die vervanging van die media-ontvanger met die mediagebruiker en medevervaardiger, en ʼn kenmerkende "aanlyn" kommunikasiestyl. Ek probeer in hierdie artikel aantoon hoe mediatiseringsteorie van ander teorieë oor die mag en effek van die media verskil, deur die klem van kousaliteit te verskuif na hoe die media as ʼn proses van mediatisering al die domeine van die samelewing en die daaglikse lewe van die mediagebruiker infiltreer. Die ontologiese uitgangspunt is dat die media naas taal en persepsie dié instrument vir menslike kognisie geword het (vir die verstaan van die wêreld, mense, dinge, gebeure, ensovoorts.) Tweedens word die verskil tussen mediatiseringsteorie en effekteorie geïdentifiseer deur te wys op mediatiseringsteorie se klem op die media as ʼn transformasieproses soortgelyk aan die sosiale prosesse van globalisering, individualisering en kommersialisering in die ná-industriële samelewing. Samevattend word geargumenteer dat die klem in mediatiseringsteorie verskuif van media en die samelewing na media in die samelewing. Ten slotte word aangetoon hoe mediatiseringsteorie aanleiding gee tot die kritiek dat normatiewe mediateorie in die nuwe digitale medialandskap heuristiese waarde as die basis van media-etiek verloor het. Op grond hiervan word aanbeveel dat kommunikasie-etiek, wat meer omvattend as beroepsgeoriënteerde media-etiek is, as uitgangspunt vir nuwe normatiewe mediateorie ondersoek word.

In this article it is postulated that normative media theory has lost its heuristic value in the new digital media landscape with its ensuing mediatisation of life, society and the world. The reaso...

Smart cities are rapidly developing in the world. Their sustainability needs to be achieved based on transformative urban systems design from system of systems perspective. Especially, to conduct evidence-based assessments, our new approach will use big data and analytics tools to support urban planner's decisions. The use of data science, analytics, and visualization will play important role to codesign urban systems with local stakeholders. This chapter outlines performance-based urban systems design. The modeling involves the use of metrics through analytical tools to evaluate sustainability of urban systems. Both qualitative (e.g., comfort level) and quantitative (e.g., CO2 emission) properties are modeled focusing on factors such as performance, experiential, and people's flow. Performance metrics are used as tools for evaluating current and predict potential future of different urban forms to support decision-makings.

New Big Data sources such as mobile phone call data records, smart card data and geo-coded social media records allow to observe and understand mobility behaviour on an unprecedented level of detail. Despite the availability of such new Big Data sources, transport demand models used in planning practice still, almost exclusively, are based on conventional data such as travel diary surveys and population census. This literature review brings together recent advances in harnessing Big Data sources to understand travel behaviour and inform travel demand models that allow transport planners to compute what-if scenarios. From trip identification to activity inference, we review and analyse the existing data-mining methods that enable these opportunistically collected mobility traces inform transport demand models. We identify that future research should tap on the potential of probabilistic models and machine learning techniques as commonly used in data science. Those data-mining approaches are designe...

Die "beeld" wat die media van 'n samelewing oordra word dikwels blameer vir die foute en mislukkings van 'n samelewing. Die antwoord wat in hierdie artikel gegee word, is dat die "beeld" slegs 'n representasie is. Die kernvraag in hierdie artikel is: Wat is hierdie "beeld" en hoe word dit gekommunikeer? Die media word gesitueer as 'n sentrale struktuur in die postmoderne samelewing. Kenmerke van die postmoderne samelewing wat van belang is vir die aard van hedendaagse media-kommunikasie, asook kenmerke van die postmoderne medialandskap en die rol van inligting- en kommunikasietegnologie daarin, word geskets. Die klem val op aspekte soos 'n nuwe soort publiek, publieke opinie, publieke sfeer, en hoe inligting- en kommunikasietegnologie 'n verskuiwing van massakommunikasie na netwerkkommunikasie bewerkstellig het. Die "beeld" wat die media skep, word as 'n geïdeologiseerde en gestereotipeerde representasie van die werklikheid beskryf. Hierdie representasies bestaan uit gestruktureerde afbeeldings en uitbeeldings van sosiale werklikhede. In terme van netwerkkommunikasie word interaktiwiteit uitgesonder as een van die sentrale kenmerke van netwerkkommunikasie. In die artikel word geargumenteer dat interaktiwiteit verantwoordelik is vir die oorwegende aanhitsende, aktivistiese, herhalende, fragmentariese, ritualistiese en aanmatigende styl van hedendaagse mediarepresentasies. Vanuit 'n semiologiese perspektief word tot die gevolgtrekking gekom dat geïdeologiseerde, gestereotipeerde en interaktiewe mediarepresentasie altyd 'n abstraksie van die werklikheid is. In dié verband word aansluiting gevind by Jean Baudrillard (1983; 1985) se beskouing van die media as 'n simulakrum van die werklikheid. Mediarepresentasies kan dus nooit objektief en "volledig" wees nie. Dít is waarskynlik die rede vir die alomteenwoordige spanning tussen regering, media en die publiek. Niemand is ooit heeltemal tevrede met die "beeld" van iets of iemand wat deur die media gegee word nie. Ten slotte word geargumenteer dat daar nie veel aan die semiologiese (betekenisgewende) aard van mediarepresentasie gedoen kan word nie. Dit sal altyd deur ideologie en lewens-, wêrelden mensbeskouings onderlê word. Wat wel in gedagte gehou moet word, is dat betekenis en die prosesse van betekenisgewing altyd op menslike keuses berus en daardeur bepaal word. 'n Pleidooi word dan gelewer vir 'n groter semiologiese bewussyn en mediageletterdheid onder mediamakers en mediagebruikers. Dit is 'n bewussyn en 'n sin van verantwoordelikheid vir hoe mediabetekenis, en in die proses 'n "beeld", in mediakommunikasie geskep word.

Although new available big data sources have revealed themselves to be extraordinarily useful for transport demand modelling, they have not come into widespread use due to the justifiable privacy concerns of data stewards. In this study, we step back and re-evaluate the way in which mobile phone telco data can be introduced for the task of transport and land-use policy evaluation, travel demand forecasting and transport infrastructure testing through large-scale transportation simulations. We investigated that question by deploying a multi-agent transport simulation driven primarily by hourly-aggregated telco Origin-Destination (OD) matrices. We address the principal four challenges: spatial and temporal disaggregation, mode imputation and route choice. For temporal disaggregation, we propose a convolution with an exponential kernel method. As for transport mode imputation, a supervised-learning framework is designed. The simulation results are compared against traffic count data and public transport smart card transactions, showing accurate patterns for private cars but overestimated public transport demand in the morning peak. Lastly, we set the future steps for the improvement of simulations driven by aggregated mobile phone data., Procedia Computer Science, 130, ISSN:1877-0509

Autonomous transit on demand (ATOD) is a potential future public transit mode, which appeals to a lot of researchers and policymakers. In the project, ATOD is simulated in MATSim to explore the optimal fleet size and deployment strategy to help policymakers to decide how to introduce the new transport system in the future. The simulation enables the system to explore the optimization automatically under specific constraints with the MATSim evolutionary algorithm., Procedia Computer Science, 130, ISSN:1877-0509

The Multi-Agent Transport Simulation MATSim, ISBN:978-1-909188-77-8, ISBN:978-1-909188-75-4, ISBN:978-1-909188-78-5, ISBN:978-1-909188-76-1