1,721,020 research outputs found
Probing new physics with exotic compact objects: the role of fermion soliton stars
Full text linkMany of the biggest puzzles in physics, such as the nature of dark matter and the
behavior of spacetime singularities, stem from the interplay between gravity and
quantum mechanics. Compact objects, like neutron stars and black holes, offer a
unique setting to investigate these questions, as they probe strong gravitational
fields and may be the only possible way to observe dark particles. With the recent
discovery of gravitational waves, we now have an uncharted way to study such
extreme environments, potentially shedding light on those fundamental issues.
This thesis focuses on fermion soliton stars, a class of compact objects that emerge
from a theory in which a nonlinear self-interacting scalar field couples with fermions
via a Yukawa interaction, resulting in an effective fermion mass that depends on the
fluid properties. We elucidate the fundamental features of this model and its links
to the Standard Model and beyond. Moreover, we provide distinctive signatures of
the model in the gravitational wave signal, offering a way to distinguish fermion
soliton stars from other types of compact objects
Diabetes mellitus-associated functional hypercortisolism impairs sexual function in male late-onset hypogonadism. Tirabassi G., Corona, G., Lamonica G.R., Salvio G., Lenzi A., Maggi M., Balercia G. 38° Congresso Nazionale SIE, Taormina, 27-30 Maggio 2015, P001
No full textInlluence of the hypothalamic-pituitary-adrenal axis dysregulation on the metabolic profile of patients affected by diabetes mellitus-associated late onset hypogonadism. Tirabassi G., Chelli F.M., Ciommi M., Salvio G., Lenzi A., Balercia G. 38° Congresso Nazionale SIE, Taormina, 27-30 Maggio 2015, P078
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Influence of work on andropause and menopause: A systematic review
No full textAging is associated with gender-specific hormonal changes that progressively lead to gonadal insufficiency, a condition which characterizes a minority of men and all women. Workrelated factors, such as stress and pollutant exposure, affect gonadal function and can interfere with reproduction in both genders. A systematic review of the PubMed, SCOPUS and EMBASE databases was conducted, according to the Preferred Reporting Items for Systemic Reviews and Meta-Analyses (PRISMA) statement to investigate the effect of occupational factors on andropause and menopause. A total of 26 studies met the inclusion and exclusion criteria: 9 studies evaluated the effects of work on andropause symptoms, 8 studies examined its effects on age at menopause onset, and 9 studies addressed its effects on menopausal symptoms. Work-related factors, such as psychological stress, physical effort, and sleep disorders, showed a significant correlation with andropause manifestations, whereas age at menopause and severity of menopausal symptoms were both influenced by factors such as pesticide exposure, high job strain, and repetitive work. Since work accompanies men and women for most of their lives, it is essential to identify and prevent the risk factors that may affect reproductive health
Hyperhomocysteinemia: Focus on endothelial damage as a cause of erectile dysfunction
Full text linkErectile Dysfunction (ED) is defined as the inability to maintain and/or achieve a satisfactory erection. This condition can be influenced by the presence of atherosclerosis, a systemic pathology of the vessels that also affects the cavernous arteries and which can cause an alteration of blood flow at penile level. Among the cardiovascular risk factors affecting the genesis of atherosclerosis, hyperhomocysteinemia (HHcys) plays a central role, which is associated with oxidative stress and endothelial dysfunction. This review focuses on the biological processes that lead to homocysteine induced endothelial damage and discusses the consequences of HHcys on male sexual function
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
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