1,721,280 research outputs found
Borexino and its physics program
No full textBorexino, a real-time detector for low energy neutrino spectroscopy is under construction in the underground laboratory LNGS at GranSasso, Italy. The experiment aims for the first direct measurement of the solar 7Beneutrino flux
Borexino and solar neutrinos
No full textThe Borexino experiment started the data tacking in May 2007. It is able to detect in real time neutrino interactions below 2 MeV, due to the very high radio-purity reached by the detector, better of more than one order of magnitude than the design goal. This allows the determination of the single fluxes of solar neutrinos from all sources. Here a measurement of the 7Be neutrino flux is presented
Counting test facility for the Borexino experiment
No full textA fundamental breakthrough which opened the way to the realization of the Borexino detector was the demonstration of exceptionally low, unprecedented radioactive contaminations in the liquid scintillator, obtained with its pilot prototype Counting Test Facility. Though of limited dimension, with its 4.8 m3 of active liquid core, CTF has however been a key milestone not only for Borexino, but also for the entire field of the ultra-low background searches. Here, we succinctly remind the motivations, which concurred to lay down the project, as well as the specific radiopurity challenge, which guided the design. After the description of the technical elements of the detector, the main outcomes are summarized, both regarding optical and purity scintillator properties, with special emphasis on the exceptional achievements in term of ultra-low traces of radioactive contaminants. The discussion is completed with the description of how CTF was employed for the pre-qualification of the entire inventory of the Borexino scintillator, confirming also in the final phase of its life its essential role for the success of the overall Borexino solar neutrino program
LA COPPETTA MESTRUALE: UNA VALIDA ALTERNATIVA AD ASSORBENTI E TAMPONI. DONNE E OSTETRICHE A CONFRONTO
No full textA menstrual cup is a cup or barrier worn inside the vagina to collect menstrual fluid, it is an alternative to pads and tampons and it was invented in the 30s, but only recently is spreading in Italy. Unlike sanitary napkin it is reusable and it can last up to 10 years, so that it is very economical and environmental friendly.
The aim of the study is to understand whether a menstrual cup may be a valid alternative to pads and tampons and evaluate if it is known among the midwives.
Two questionnaires have been developed: one for women and one for midwives.
The women’s one investigates the use of the menstrual cup, its comfort and efficiency, the presence of difficulties during insertion and removal; at last asks women who don’t use a menstrual cup if they would like to try it and if not requires a reason.
The midwives’ one investigates their knowledge about menstrual cups, so technical questions have been demanded and finally they were asked what kind of woman they would recommend it to.
1190 women have answered the questionnaire and the ones who use menstrual cups are overall satisfied, even if they had difficulties with insertion and removal at the beginning, and nearly all of them will keep on using it and would recommend it to other women. One half of the women who don’t use a menstrual cup would like to try it and the other half says they wouldn’t like it because they think it is unhygienic and uncomfortable.
514 midwives answered the questionnaire and most of them are aware about menstrual cups and their technical aspects; there is some gap about the existence of different models of menstrual cups, who is indicated for and about the cleaning.
To conclude a menstrual cup can be a valid alternative to pads and tampons and most of the midwives would recommend it to all woman or only to the ones who have confidence with their body, just a few midwives wouldn’t recommend a menstrual cup at all
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
Leaving Mum Alone? The Effect of Parental Separation on Children’s Decisions to Leave Home
Full text linkThere is a growing body of literature that examines the relationship
between parental separation and children’s life-course patterns. The aim of this
paper is to analyze the effect of parental separation on the timing of nest-leaving of
young adults. After providing descriptive findings using the recent Generation and
Gender Survey for six countries (Italy, France, Hungary, Bulgaria, Russia, and
Georgia), we assess the extent to which the association between parental separation
and nest-leaving timing is masked by two mechanisms. First, do the children of
separated parents develop characteristics that differ from those of children of intact
families, which in turn cause them to leave the parental home at a different pace?
Second, do the children of separated people leave the parental home at different
ages in response to the new family structure? After we identify the two mechanisms
at work, our findings become similar across countries, and show that children who
have experienced parental separation tend to leave home earlier, but that the last
child in the household—who would leave the mother alone—tends to delay his/her
departure
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