1,721,044 research outputs found
Some aspects of locust control in Sardinia in the first half of the twentieth century / Alcuni aspetti della lotta alle cavallette in Sardegna nella prima metà del XX secolo
No full textArsenic Locusts. The control of locusts in Sardinia in the first half of the twentieth century. / Cavallette all’arsenico. La lotta alle cavallette in Sardegna nella prima metà del 1900
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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
Larvae of Gymnocnemia variegata (Schneider, 1845) and Megistopus flavicornis (Rossi, 1790) (Neuroptera Myrmeleontidae)
No full textDoes TEC react to a sudden impulse as a whole? The 2015 Saint Patrick's day storm event
No full textWe provide insights about how the Total Electron Content (TEC), derived by a network of Global Navigation Satellite System (GNSS) receivers over the European longitudinal sector, reacts to a Sudden Impulse (SI). In particular, we investigate how the different components of the TEC variability relates with the ionospheric currents, derived by ground magnetometers and the Piersanti and Villante (2016) model, during the 2015 Saint Patrick's Day storm. To identify the different TEC components, we apply the Ensemble Empirical Mode Decomposition (EEMD) analysis to vertical TEC (vTEC) time series to isolate its SI-related variations over co-located GNSS receiver-magnetometer couples. With such an approach, we were able to identify for the first time a peculiar vTEC mode (WHT∗, T ≃ 45 min) switching on during the SI and propagating southward with a velocity of ∼1.5 km/s. We also found a linear relationship between the estimated ionospheric current and the temporal fluctuations of WHT∗ for both the Preliminary Impulse (PI) and the Main Impulse (MI). The slope has been found to depend only on the electron charge, on the magnetic permeability and on the altitude of the ionospheric E-layer, as expected from first principles equations and as discussed in detail
Myrmeleon mariaemathildae n. sp.: a new Mediterranean pit-building antlion (Neuropterida Myrmeleontidae)
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
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