1,720,977 research outputs found
Designing innovative transport systems, electric and automated on priority corridors
Full text linkThis study focuses on two great technologies improvements, they are vehicle automation and newest fast charging methods that could enable new and innovative transport systems.
Automated and electric vehicles could will enable first/last mile efficient transport services, economically and environmentally sustainable that could be useful to improve transportation services in rural sprawled areas with a low density of transport demand. It is proposed an innovative system concerning electric and automated vehicles in specific paths called priority corridors, it is described a methodology of designing leaving the detailed analysis and impacts analysis to future studies.
Automation, Internet of Things and smartphones are revolutionising mobility and with it the economy. With such mobility revolution all aspects of our life, economic, social and environmental will be impacted. Automated vehicles can be deployed as personal vehicles or as shared vehicles; while personal vehicles are not yet ready for deployment shared vehicles are.
This work aims to propose an innovative transport system with off the shelf technologies and a methodology of design dealing with vehicle automation, current designing methods and environmental impacts.
The methodology foresees six steps, they could be repeated with an iterative change of parameters in order to compare different results. These steps are: Parameters and input data, Itinerary analysis and corridors identification, Corridor choice and speed profile generation, Vehicle choice and fleet dimensioning, Electric traction needs and specifications, Results evaluation.
Four categories of results are considered: vehicles and operators needed, energy consumption, transportation and socio-economic evaluation. After the results calculation, it is required an evaluation of them.
Methodology is applied to Mentana, a little town in the outskirts of Rome. Mentana has only one corridor that links city centre to train station be distant eight kilometres. Economic results are positive, revenues cover operative costs and the whole system doesn’t require subsides
Spazia-HPP: Hybrid Plug-in for Small Vehicle
Full text linkAbstractThe Spazia-HPP project proposes a conversion kit called Hybrid Power Pack (HPP) [5] for common microcar; it was installed on a prototype called “Spazia”, a typical quadricycle of the category L6e. It has an internal combustion engine, which allows you to turn common microcar into parallel hybrid thermal – electric vehicle.The aim is to promote a system of easy installation, which increase acceleration by 20% and reduces fuel consumption by almost 25% compared to a traditional Diesel quadricycle. The results are obtained by testing on a chassis dynamometer at the research centre ENEA Casaccia (Rome)
A Platform To Communicate Knowledge: K-COM2024 A Platform To Communicate Knowledge...
Full text linkThis article introduces the K-COM (Knowledge COMmunication) system, a web portal for knowledge management and effective communication, that has been developed as part of the italian ES-PA (Energy and Sustainability for Public Administration) project. The platform organises the set of information into Knowledge Objects (KO) within specific Knowledge Pathways (KP) regarding energy efficiency issues. A KO is a resource of a different type (audio, video, textual) placed within a specific KP and identified by an information card (Card). In particular, the application is focused on on-the-job support to Public Administration (PA) users in the field of energy efficiency. The system enables bi-directional communication with a diverse and ever-changing user base. The user categories are government decision-makers, stakeholders and technical and administrative staff employed in public and private sectors. The platform has been populated with gold resources and its usability has been successfully validated with usability test
Hybrid Power Pack: Hybrid Powertrain for City Cars
No full textThis paper presents a novel concept, the Hybrid Power Pack (HPP), which consists of a hybridization
kit for transforming small city cars, powered by an original diesel engine, into a parallel hybrid
vehicle. The study was jointly conducted by the University of Rome “Sapienza” and the Enea
Casaccia research center. The idea is to design a hybrid powertrain that can be installed in a typical
microcar, which means that all systems and components will be influenced by the limited space
available in the motor compartment of the vehicle. In this paper the details of the mechanical and
electrical realization of the powertrain will be discussed and the simulation of a small city car
equipped with HPP will be presented and the results discussed and analyzed. The hybrid system
also includes the battery pack which is composed of twenty-four Li-ion cells made by EIG, connected
in series. The storage system is controlled as regards the voltage and temperature by a
Battery Management System (BMS). All the above components are connected and managed by a
control unit. The HPP presented in this paper obtains a reduction in fuel consumption higher than
20%. The solution presented with the HPP with its management strategy and the addition of the
“plug-in function” makes the hybrid vehicle suitable in terms of performance and consumption in
every driving conditions. The ideal strategy behind the “plug-in function” could represent a guideline
for further achievements and experimentations, because it offers a simple hardware layout
and a real reduction in fuel consumption
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The Smart Ring Experience in l’Aquila (Italy): Integrating Smart Mobility Public Services with Air Quality Indexes
Full text linkThis work presents the “City Dynamics and Smart Environment” activities of the Smart Ring project, a model for the smart city, based on the integration of sustainable urban transport services and environmental monitoring over a 4–5-km circular path, the “Smart Ring”, around the historical center of l’Aquila (Italy). We describe our pilot experience performed during an experimental on-demand public service electric bus, “SmartBus”, which was equipped with a multi-parametric air quality low-cost gas electrochemical sensor platform, “NASUS IV”. For five days (28–29 August 2014 and 1–3 September 2014), the sensor platform was installed inside the SmartBus and measured air quality gas compounds (nitrogen dioxide, carbon oxide, sulfur dioxide, hydrogen sulfide) during the service. Data were collected and analyzed on the bases of an air quality index, which provided qualitative insights on the air status potentially experienced by the users. The results obtained are in agreement with the synoptic meteorological conditions, the urban background air quality reference measurements and the potential traffic flow variations. Furthermore, they indicated that the air quality status was influenced by the gas component NO2, followed by H2S, SO2 and CO. We discuss the features of our campaign, and we highlight the potential, limitations and key factors to consider for future project design
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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