Abstract

Electric buses are particularly suitable for city and suburban routes due to zero local exhaust and noise emissions. The operation schedule interval defines the charging power, bus fleet size and total cost of ownership of a bus. We propose a novel cost-benefit method for the scheduling of an electric city bus fleet on a single route. Three different charging infrastructure scenarios were considered. In the first scenario, only one charging station was used. The second scenario considered two charging stations that were located at the same terminus. In the third scenario, two charging stations were located at opposite terminuses. The costs and utilization rates of the buses were analyzed with operation intervals up to 40 minutes. The first scenario with a single charging station had the lowest costs for the entire bus fleet system when the utilization rate was considered. Furthermore, the results show that certain schedule intervals are more cost-beneficial in terms of vehicle specific life-cycle costs than others. In the future, the proposed method is expanded to aid the design of bus network scheduling under energy demand uncertainty. Peer reviewed

Abstract

Cities have become the most common living environment for humans. With this rising urbanization, urban design has become vital for these growing cities. While measuring objective data like traffic congestion or air quality is important, it does not tell the whole story of how people live in the cities or how cities should be developed to make them more livable. In future for a true smart city a more humane component is needed to understand how the population of cities actually interact with and feel about their surroundings. Surveys are a great and a necessary tool for this and they are already being used in the design process. However, they require effort and and a lot of silent information can be missed. The surveying process also doesn't happen in real time. We suggest that social media data could be used to gather more information about human- environment interaction in cities and compliment the surveys. We show a working prototype of a tool that creates an emotional map of a city by mining social media data for sentiments and heatmapping them. This kind of method could prove to be an useful tool for urban designers, who could take advantage of the visual intuition of humans and see instantly where and how emotional hotspots arise. It could also be of interest for emotion researchers, who could get data on what it really means to be happy for a human being - for example eating an ice cream at the beach - instead of only linking conceptual words (such as happy) to external stimuli (such as smiling). Peer reviewed

Abstract

When a human ages, the functional abilities could weaken, which can lead to isolation from the society. Applying technological aid for improving the quality of life of the elderly helps them to stay independent and active in their community across their life. This article introduces a system, which is empowering the elderly by aiding them in using public transportation in both rural and urban environments, and helps them in this way to maintain the mobility and activity. The ASSISTANT system provides a simple, yet effective, route info for user and shows only relevant information, at the right time and in the appropriate format. The system is communicating with the user via audio and visual guidance. In addition, it has an error detection functionality, which helps user in case of common navigation errors. End user evaluation performed in Helsinki (Finland), Vienna (Austria) and Donostia-San Sebastian area (Spain) confirms that the service works as intended and helps older people to use public transport by guiding them all the way from the start to the end of their journeys. The system was found to be particularly helpful on unfamiliar routes.