1,721,203 research outputs found
The Onset of fertility transition in Italy, 1800-1900
No full textThis paper constitutes one of the first steps of a research project on the evolution of reproductive behaviour analyzed at the individual and household level. The core of the project is a re-examination of the theory of the demographic
transition in Italy from the last decades of the nineteenth century to the mid-twentieth century.
This paper presents the first comparative results over a period spanning from 1820 to the end of the nineteenth century, and it is focused on the reproductive behaviour of married women in their own families. In this period, the elements of
the subsequent fertility transition can be barely detected at a general level, however it is possible to create a clear picture of the existing differentials in fertility outcomes in a period in which important social and economic transformations were taking place. In fact, we e consider it extremely useful to better highlight the levels of fertility which were found in many different geographical settings of Italy before the onset of the fertility transition. This issue is of great importance to our understanding of not only fertility behaviour before the transition but also of the fertility decline as such. Geographical differentials, such as those related to different social groups with varying socio economic status, diffusion of urban habits and domestic economies, were the basic elements on which the demographic transition would take place
A note on the Poincaré inequality for Lipschitz vector fields of step two
No full textWe provide a Poincarè inequality for families
of Lipschitz continuous vector fields satisfying a Hormander-type condition of step two
Fundamental solutions for sum of squares of vector fields operators with C^{1,α} coefficients
No full textWe adapt Levi's parametrix method to construct a local fundamental solutions for operators of the form sum_{i=1}^m X_i^2,
where X_1,ldots, X_m are H"ormander
vector fields of step 2 having non-smooth coefficients. We
also provide estimates of the fundamental solution and of its derivatives
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
Utilizzazione zootecnica degli effluenti di distilleria: determinazione dell’energia metabolizzabile e della digeribilità di diete contenenti borlanda di melasso di bietola concentrata (BMBC) su polli da carne
No full textSu 80 polli maschi Hubbard di 21 giorni di età sono state determinate l'energia metabolizzabile e la digeribilità della sostanza secca, della sostanza organica e dell'azoto di diete di controllo e di diete contenenti il 7% di borlanda di melasso di bietola concentrata (BMBC) al 63% di sostanza secca
Effetti esercitati dall’autossidazione della quota lipidica in diete per broilers
No full textL'indagine, condotta su 300 pulcini Hubbard di entrambi i sessi, ha valutato gli effetti esercitati dall'autoossidazione della frazione lipidica dell'alimento sull'incremento ponderale, sull'indice di conversione e sulle rese di macellazione. Nessuno di tali parametri, nonchè l'esame delle carcasse e dei visceri dei soggetti macellati (1,7-2 kg di p.v.), ha evidenziato differenze significative
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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