1,721,047 research outputs found
Atti del Convegno Internazionale su "Promozione e commercializzazione della pesca nel bacino del Mediterraneo. Profili giuridici, economici e gestionali"
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Physiological responses to pain in cancer patients: A systematic review
Full text linkBackground and objective: Pain is one of the most debilitating symptoms in persons with cancer. Still, its assessment is often neglected both by patients and healthcare professionals. There is increasing interest in conducting pain assessment and monitoring via physiological signals that promise to overcome the limitations of state-of-the-art pain assessment tools. This systematic review aims to evaluate existing experimental studies to identify the most promising methods and results for objectively quantifying cancer patients’ pain experience. Methods: Four electronic databases (Pubmed, Compendex, Scopus, Web of Science) were systematically searched for articles published up to October 2020. Results: Fourteen studies (528 participants) were included in the review. The selected studies analyzed seven physiological signals. Blood pressure and ECG were the most used signals. Sixteen physiological parameters showed significant changes in association with pain. The studies were fairly consistent in stating that heart rate, the low-frequency to high-frequency component ratio (LF/HF), and systolic blood pressure positively correlate with the pain. Conclusions: Current evidence supports the hypothesis that physiological signals can help objectively quantify, at least in part, cancer patients’ pain experience. While there is much more to be done to obtain a reliable pain assessment method, this review takes an essential first step by highlighting issues that should be taken into account in future research: use of a wearable device for pervasive recording in a real-world context, implementation of a big-data approach possibly supported by AI, including multiple stratification factors (e.g., cancer site and stage, source of pain, demographic and psychosocial data), and better-defined recording procedures. Improved methods and algorithms could then become valuable add-ons in taking charge of cancer patients
E-band Radio Fiber as Low-Cost mm- Wave Waveguide Junction
No full textNext generation mm-wave communications foresee to heavily rely on higher frequency bands, such as the E- and D-bands. At these frequencies, novel transmission line technologies can emerge and the confinement properties of a cylindrical dielectric rod look indeed attractive to realize short mm-wave junctions or moveable joints. This paper investigates the possibility of a Plexiglas-based radio fiber for the aforementioned purposes. The described design flow is based on the well-known optical fiber theory to assess the guided modes, their cut-off frequency and their shapes. This manuscript reports also the experimental results of three E-band radio fiber junctions and their propagation characteristics
Substrate Integrated Waveguide Components on Alumina for E-band Applications
No full textThis manuscript presents a set of Substrate Integrated Waveguide components realized through thin-film technology and suitable for E-band applications. The non-standard choice of alumina as dielectric material leads to superior performance and increases the operational frequency of such devices, usually limited by fabrication tolerances. The intrinsic fragility of the ceramic substrate is mitigated through ad-hoc design rules which limit the via-hole density while the higher dielectric constant allows a small die size, with clear advantages in stiffness and handling robustness. Three components have been designed, manufactured and tested: a straight interconnection, a matched load, and a three-pole in-line band pass filter. All the devices show interesting performance across the 70-80 GHz spectrum portion
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
Filtennas in Space: A Novel Approach for Radio-Frequency Interference Mitigation
No full textThe coexistence of wireless transmitters for downlink communications and radio sensing instruments onboard spacecraft poses severe challenges concerning electromagnetic compatibility. Among the possible solutions, the chance to integrate complex filtering functions into the antenna devoted to data transmission offers a space-effective way to improve isolation by suppressing out-of-band emissions. The present manuscript describes the flexibility given to satellite integrator by using the filtenna paradigm, as well as a complete description on possible designs and trade-offs. As example, a horn filtenna for Ka band is also numerically proven and mechanical designed
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