1,721,431 research outputs found
Confronto tra un modello di regressione multipla e un modello connessionista per la previsione della prestazione universitaria
No full textThe paper presents a comparison between two forecasting methods, the first one based on a multiple regression model and the second one based on a connecionist model, applied to rhe problem of choosing bachelor course. The sample is a set of 250 students enrolled at the faculty of Economics of University of Padua in the academic year 1995/96. We investigated the relation between the explanatory variables (scored obtained at the admission test to the course, schoolleaving scores, and others) and the number of passed exams together with the evaluation in a unique variable. This variable allow to characterize three levels of performance. The comparison between the observed and estimated levels, carried out by making use of distribution free tests, has highlighted both substantial homogeneity of results and interesting peculiarities
Exploiting symbiotic interactions between Chlorella protothecoides and Brevundimonas diminuta for an efficient single-step urban wastewater treatment
No full textThe application of microalgal bacteria consortia to the treatment of wastewater is receiving increasing attention, meeting the demand for new green and efficient technologies for water remediation. The specificity of the consortium, however, may strongly affect the performance of the treatment. In fact, even though a general exploitation of the O2/CO2 exchange between microalgae and bacteria is effective, some specific interactions may increase the pollutant removal. With this aim, the co-cultivation of Chlorella protothecoides and Brevundimonas diminuta was tested, with particular attention to the removal capability of nitrogen, phosphorus and chemical oxygen demand (COD) from wastewater. Batch experiments were carried out both for the consortium and, separately, for the bacteria and microalgae alone, in order to compare their performances. B. diminuta showed a remarkable capability for removing organic substances and transforming organic nitrogen to ammonium. C. protothecoides efficiently removed nitrogen and phosphorus. As the specific growth rates of the two organisms are different, the co-cultivation was also carried out also in a continuous system, and the effect of hydraulic retention time (HRT) on the steady-state biomass concentration and nutrient removal efficiency was verified. Residence time was found as the main operating variable for obtaining a significant reduction of pollutants from wastewater
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
Phytoplasmas associated with strawberry phyllody, pear decline and apricot chlorotic leaf roll diseases.
No full textVariations 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
Planning, Planting, and Maintaining New Urban Forests in the Metropolitan Area of Milano: Case Study of Forestami
Full text linkUrbanization presents profound challenges to environmental sustainability, characterized by the depletion of green spaces and the degradation of urban ecosystems. Acknowledging the pivotal role of urban forests in mitigating environmental degradation and enhancing urban life quality, cities are increasingly adopting participatory approaches to afforestation. This paper explores the relationship between research and the practical implementation of urban forests, emphasizing the significance of constructing a robust network of stakeholders.
The case study selected is the research project called Forestami, which aims to plant three million new trees and shrubs within the metropolitan area of Milan by 2030. This initiative promotes green infrastructure, ecological connections, and related ecosystem services; improves the public health of citizens; increases urban and peri-urban permeable surfaces; and protects and expands territorial biodiversity. By examining the interplay between research insights and on-the-ground implementation, this paper underscores the critical importance of forging a diverse network of stakeholders to navigate the complexities of urban forestry initiatives. Through this collaborative framework, cities can cultivate resilient and vibrant urban ecosystems that enrich the lives of residents while safeguarding the environment for future generations
Urban Forestry: Perspectives from Sub-Saharan Africa Between Planning and Global Challenges
No full textDispelling 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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