1,720,976 research outputs found
The smart management of “construction site” in a post-seismic scenario using UAV photogrammetry.
No full textDuring the post-seismic reconstruction phase in L'Aquila, the presence of many construction sites at the same time highlighted different problems related to their management, especially in historic centres where the lack of space affects the construction sites management. In this cases it's important to optimize the space management in order to support the people in charge of design the reconstruction site plan. A big challenge is represented by to find appropriate space devoted to the materials and ruins storage, the management of ancillary services and to coordinate the simultaneous presence of trucks in narrow streets (typical of historic centres) with limited access. This work describes how the UAV photogrammetry can be effectively used to analyse the construction areas and the surrounding in order to improve the logistics and to detect the interferences in the construction sites like for example the presence of several cranes that need to be operated at the same time. Furthermore, the photogrammetry technique is extremely useful also during the execution phase of the project in order to monitor the development stages inside the building site and the relative developments layout configurations. This work presents a case study related to the use the UAV photogrammetry technique to support the reconstruction phase of several construction sites at the same time in the historical centre of Villa Sant'Angelo in L'Aquila. This approach allows different prospective, economic, timing and safety for the construction sites itself. Furthermore, the obtained 3D models may represent the first informative layer for the innovative BIM system devoted to support the management of the reconstruction sites
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
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
13° Workshop tematico di Telerilevamento
No full textThe study propose to investigate and represent the great environmental and urban heritage by acquiring spatial data with
remote sensing techniques. In particular, we will start with the use of multispectral satellite images, taking advantage of
the effective knowledge of automatic (or semi-automatic) extraction of land cover data and detailed information about
the investigated areas in order to create a parametric model of the city for urban planning management. The case study is
the city of L’Aquila (Abruzzo, Italy) and its hamlets, affected by the tragic 2009 earthquake event, as well as an area of
continuous transformation. Several spectral indices and the presence of any heat islands from the multispectral images
were extracted, useful for further analysis. About the indices, the NDVI (Normalized Difference Vegetation Index) was
obtained from the World-View 2 image to analyse the split between built-up area and vegetation and the vigour status of
public parks and gardens (1). In addition, some other spectral indices related to the built-up area are investigated, such as
the NDYG (Normalized Difference Yellow Green) and the NDNB (Normalized Difference NIR1 and Blue) to identify
respectively the presence of tiles (2) and the presence of asbestos in the roofs (3) in the existing buildings. Finally,
additional indices were extracted such as NDWI, Normalized Difference Water Index, for the water-body related to
lakes, rivers or anthropogenic features such as swimming pools (1) and WV-II, WorldView New Iron Index, to identify
elements with the presence of iron oxide (4). In addition, the topic focuses attention on describing the distribution of
the Urban Heat Island (UHI) phenomenon through the potential investigation of surface temperature derived from the
Thermal Infrared band (TIR) and NDVI. Landsat 8 images, considered over the summer period 2013-2018-2019, were
used for obtaining an initial estimate of Top of Atmosphere (TOA) (5).
Then, using the NDVI index, Proportion of Vegetation (Pv) was extracted and the ground emissivity was obtained (6).
Finally, the LST (Land Surface Temperature) equation was applied to obtain the surface temperature map (6). This
procedure is useful for identifying possible UHI in the territory, i.e., those urban areas that are significantly hotter
than the surrounding rural areas due to anthropogenic activities. The new data obtained from the multispectral images
were then added to the DBTR (Territorial Regional DataBase – the open database of the Regional Geoportal) through
spatial analysis procedures in GIS (Geographic Information System), to update the information collected into the official
regional sources. Then, the updated database was used by means Rhino’s Grasshopper plugin, to build an extended 3D
urban model, called CIM (City Information Modeling), useful for urban planning management.
Through the analysis of the area, it is possible to highlight the presence of critical issues, from which respective strategies
can be outlined, fostering an environmentally sustainable policy. For example, in order to reduce the effects of UHI, it is
possible to analyse and cross the data obtained by the multispectral images (LST, NDVI and other vegetation indices),
increasing green areas in densely populated urban areas, thus reclaiming and redeveloping. Furthermore, thanks to
the high frequency of satellite image acquisition, it is possible to have up-to-date urban planning databases and the
possibility to monitor the corrective strategies/ actions implemented. In this paper, the potential of remote sensing by
high-resolution multispectral satellite imagery is crucial both to deepen and learn more about the investigated area and
to obtain updated information in a short time. In conclusion, the body of information, extracted by multispectral images,
will allow for the future monitoring of different aspects of the in-depth areas using new digital technologies, e.g., CIM,
proposing diversified solutions based on the source data and targeted to the precise and timely needs of the area
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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