1,721,012 research outputs found
Prolactin and certain obstetric stress conditions.
No full textProlactin levels were evaluated during certain stress conditions, obstetric or gynecologic surgical interventions, labor, and birth. In 68 patients undergoing voluntary abortion, prolactin levels were measured to study the effect of anesthetics and of dilatation and curettage on hormonal secretion. Prolactin levels were evaluated in five patients undergoing elective cesarean section and in five post-menopausal patients undergoing total abdominal hysterectomy with bilateral oophorectomy. Moreover, prolactin concentration in serial samples of blood was estimated in 32 normal patients with spontaneous vaginal delivery at term and in 16 newborns at term after 30-60 and 120 min following birth. Prolactin responsiveness to TRH was evaluated in 12 newborns at the 4th day of life. Plasma prolactin levels rose in all the stress conditions investigated except in labor, during which hormone levels showed a decrease starting 2 h before delivery and reaching the lowest value 1 h prior. From this moment on there was a remarkable rise in prolactin concentration, with a peak 1 h after delivery. The decrease in prolactin levels during labor could possibly be due to an increase in dopaminergic activity. Moreover, the finding of no variation of prolactin levels during induced abortion in a group of patients pretreated with methysergide supports the view that the serotoninergic system also affects prolactin release.Prolactin levels were evaluated during certain stress conditions, obstetric or gynecologic surgical interventions, labor, and birth. In 68 patients undergoing voluntary abortion, prolactin levels were measured to study the effect of anesthetics and of dilatation and curettage on hormonal secretion. Prolactin levels were evaluated in 5 patients undergoing elective cesarean section and in 5 postmenopausal patients undergoing total abdominal hysterectomy with bilateral oophorectomy. Moreover, prolactin concentration in serial samples of blood was estimated in 32 normal patients with spontaneous vaginal delivery at term and in 16 newborns at term after 30-60 and 120 minutes following birth. Prolactin responsiveness to TRH was evaluated in 12 newborns at the 4th day of life. Plasma prolactin levels rose in all the stress conditions investigated except in labor, during which hormone levels showed a decrease starting 2 hours before delivery and reaching the lowest value 1 hour prior. From this point on, there was a remarkable rise in plasma concentrations, with a peak 1 hour after delivery. The decrease in prolactin levels during labor could possibly be due to an increase in dopaminergic activity. Moreover, the finding of no variation of prolactin levels during induced abortion in a group of patients pretreated with methysergide supports the view that the serotoninergic system also affects prolactin release
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
Carmelo Bene et le théatre comme nostalgie d'une absence
No full text«V’è una nostalgia delle cose che non ebbero mai un cominciamento» («Il y a une nostalgie de choses qui n’ont jamais commencé»). Cette phrase, pour cause placée au début de l’autobiographie/automythografie de Carmelo Bene Sono apparso alla Madonna, offre une clé d’interpretation importante, croyons-nous, de toute son œuvre e toute sa pensée. Tout ce qui Bene a écrit et crée provient, en effet, de la nostalgie de quelque chose qui n'a jamais été et n’a pas eu de commencement : d’une absence, donc, de laquelle toutefois Bene rêve en tant que telle, pas comme le vide d’une présence à rétablir ; un manque qui ne doit pas être remédié, mais mis en scène (scène de la parole, du théâtre, du cinéma) exactement dans son « disessere ».
Contrairement à ceux qui, comme Fuchs, Craig et Artaud, et plus tard Grotowski et Barba, ont cherché le théâtre à partir de la nostalgie d’un archè, une origine qui, aussi mythique qu’elle soit, ils ont utilisée comme le modèle d’un thèâtre « plein » et « présent », Bene a toujours considéré le théâtre comme une absence originaire et irrémédiable, que pas de réforme ou révolution pourrait amender. C’est pourquoi la nostalgie est intrinsèque à son théâtre, comme un nostos toujours dévié vers le rien comme celui de l’Ulysse de Dante, mais, dans ce cas, parce-que Ithaque n’a jamais existé. D’ici le caractère poignant, la douloureuse blessure sentimentale de toutes les mises en scène de Bene et le tournage continu de son jeu autour de la nostalgie de l’inexistant « Grand’Attore »
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
Dispelling 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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