1,720,954 research outputs found
Leveraging the Potential of PRISMA Hyperspectral Data for Forest Tree Species Classification: A Case Study in Southern Italy
Get PDFHyperspectral imagery and advanced classification techniques can significantly enhance remote sensing’s role in forest monitoring. Thanks to recent missions, such as the Italian Space Agency’s PRISMA (PRecursore IperSpettrale della Missione Applicativa—Hyperspectral PRecursor of the Application Mission), hyperspectral data in narrow bands spanning visible/near infrared to shortwave infrared are now available. In this study, hyperspectral data from PRISMA were used with the aim of testing the applicability of PRISMA with different band sizes to classify tree species in highly biodiverse forest environments. The Serre Regional Park in southern Italy was used as a case study. The classification focused on forest category classes based on the predominant tree species in sample plots. Ground truth data were collected using a global positioning system together with a smartphone application to test its contribution to facilitating field data collection. The final result, measured on a test dataset, showed an F1 greater than 0.75 for four classes: fir (0.81), pine (0.77), beech (0.90), and holm oak (0.82). Beech forests showed the highest accuracy (0.92), while chestnut forests (0.68) and a mixed class of hygrophilous species (0.69) showed lower accuracy. These results demonstrate the potential of hyperspectral spaceborne data for identifying trends in spectral signatures for forest tree classification
A People-centered Approach to Historic Gardens: The Influence of Social, Political and Economic Factors on Management and Fruition
Get PDFHistoric gardens are heritage properties of great environmental, cultural, social, political and economic value, yet they are also precarious because they are composed of living elements. Their survival, in fact, depends on constant care.
This research project seeks to analyze the social, political and economic factors influencing the management and fruition of historic gardens to improve their conservation and ability to contribute to human wellbeing and quality of life. These themes are both missing from existing literature and relevant to current trends in historic garden conservation and fruition made even more evident by the COVID-19 pandemic.
Various research methodologies are applied in pursuit of the research aim, including: qualitative interviews providing a first-hand account of the motivations and struggles of those who care for historic gardens; a systematic review of the literature to trace the development of themes and trends in the research and identify significant gaps; document content analysis to make sense of the various political entities and instruments governing historic gardens; spatial analysis to investigate the potential and actual influence of heritage lists on recreational ecosystem service demand; the zonal travel cost method to assess the actual economic value of recreational ecosystem services created by an event in a historic garden.
Some of the investigations conducted as part of the dissertation use the city of Palermo (Italy) as a case study to analyze the problems affecting historic garden management and fruition. Palermo’s parks and gardens have been celebrated throughout history, and they still make up most the city’s green spaces. However, they are also recognized as being neglected and deteriorating. Palermo is also a good model for internationally relevant issues related to historic gardens, including the effect of economic and health crises on the management and fruition of green spaces, public austerity, dysfunctional bureaucracy, sustainable development and wellbeing, making the results of these investigations relevant internationally as well as locally.
The results of this research provide a people-centered perspective on the management and fruition of historic gardens. By considering the social, political and economic contexts in which they exist, the research identified developments in natural and cultural heritage practice, policy and planning that have important implications for historic garden management and fruition. Recent policy has focused on issues of sustainability and wellbeing, and consequentially put more emphasis on the experiences these heritage sites provide and on the stakeholders they involve. With this perspective, public engagement initiatives organized in historic gardens play an important role in involving the community, creating meaningful experiences and creating economic value. They are human inputs that transform potential cultural ecosystem service benefits into actual benefits.
These findings also have implications for the governance, planning management and fruition of other resources valued for their cultural ecosystem services. The research presented here can also be fruitfully applied to investigations of the various cultural ecosystem services provided by such areas as urban green spaces, cultural landscapes and nature reserves. These qualitative, spatial and economic assessments are necessary to ensure that public policy measures, investments, and private or non-profit management strategies are effective in meeting their objectives to contribute to human wellbeing and conserve resources for the future
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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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