1,720,963 research outputs found
Exploitation of Energy Performance Certificate Database in Urban Energy Modelling
No full textCities are crucial for the energy transition, as recognized by the European Union in policies such as the Fit for 55 package and the Climate-Neutral and Smart Cities mission. The former calls for the revision of several directives, among which the Energy Performance of Buildings Directive (EPBD) plays a major role, targeting the phasing out of fossil fuels and the achievement of minimum performance objectives for all existing buildings. It reinforced the role of the Energy Performance Certificate (EPC) as a shared evaluation schema. However, considering the 30-50% coverage of EPCs in the European building stock, new methodologies and models are required to assess the building stock extensively. Considering the valuable data contained in EPCs, these can be used to train Urban Building Energy Models which leverage the potential of Earth Observation. This study proposes a new method to segment the building stock according to thermographic pictures, resorting to EPC information for the energy class distribution analysis. Thermographic values are used to assess thermal losses and replicate the energy class distribution accordingly. Different EPC data are assessed in order to understand the best configuration both in terms of share between training and validation data and of the need for potential pre-filtering. The method appears to be reliable – with 66% of buildings classified correctly on average – yet simple, thus being attractive for policymakers to define retrofitting campaigns able to meet European requirements. With simplicity and flexibility being the main strengths of the method, it is also possible to consider additional inputs and make the model more complex to improve the accuracy
GIS-based solar radiation modelling for photovoltaic potential in cities: A sensitivity analysis for the evaluation of output variability range
Full text linkIntegration of aerial thermography and energy performance certificates for the estimation of energy consumption in cities
Full text linkBased on the major role of the building sector in the energy transition, multiple policies on the topic have been issued at the European level, resulting in a need for methodologies to support energy retrofitting campaigns. Based on a preliminary segmentation of the building stock in terms of year of construction and surface-to-volume, this study aims to model the energy demand of buildings at urban scale from the integration of data elaborated from the available Energy Performance Certificates with thermographic data returning the actual heat losses of the buildings. The new proposed approach proved to be more reliable than methods currently available in the literature, providing energy performance classification of all buildings with 80 % accuracy. Conclusions remark on the potential of such analysis, with ready-made solutions to be used by Public Administrations for city-scale energy assessments, thus making them able to comply with European legislation and – potentially – design Renewable Energy Communities
Aerial lidar and infrared thermography for urban-scale energy assessment and planning
No full textThis volume collects 34 selected articles that have been grouped into 4 chapters organized in thematic clusters. They refer to the impacts of human activity on the environment, highlighting the state-of-the-art potentialities of Earth Observation in the environmental analysis, monitoring, and protection, with particular concerns about climate change-related effects, natural resources, and human health. 1. Urban & cultural heritage focuses on contributions given by EO in the framework of environmental risks, urban planning, cultural heritage monitoring and documentation, and energetic efficiency. 2. Environment includes works representing studies at the territorial scale about different environmental components in relationship with threads that climate change has introduced. 3. Agriculture and Forestry, show the increasing role of EO in the agricultural and forest fields, related to their roles to the environmental sustainability of management and carbon stocks balances. 4. Algorithm & sensors presents and comparing new approaches and algorithms to support sensitive needs from civil society, like photovoltaic plants monitoring and location, oil spills, infrastructures monitoring
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
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
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