186,921 research outputs found
Use of administrative data in healthcare research
No full textHealth research based on administrative data and the availability of regional or national administrative databases has been increasing in recent years. We will discuss the general characteristics of administrative data and specific aspects of their use for health research purposes, indicating their advantages and disadvantages. Some fields of application will be discussed and described through examples
Methodological Issues in the Use of Administrative Databases to Study Heart Failure
No full textAdvantages and criticisms in using administrative data for clinical and epidemiological research are well discussed. These databases were originally designed for administrative aims rather than for clinical research. Several choices are necessary to make these databases suitable for clinical and epidemiological research. The choices have to be explicit and clearly declared, to let the reader know their possible effects. In this work we discuss methodological issues concerning the preliminary work on data from a regional project.
Methodological issues in the use of administrative databases to study heart failure.. Available from: http://www.researchgate.net/publication/263325973_Methodological_issues_in_the_use_of_administrative_databases_to_study_heart_failure [accessed Jun 4, 2015]
Variable Data Rate Architectures in Optical LEO Direct-to-Earth Links: Design Aspects and System Analysis
No full textIn the frame of ongoing efforts between space agencies to define an on-off-keying-based optical low-Earth-orbit (LEO) direct-to-Earth (DTE) waveform, this paper offers an in-depth analysis of the Variable Data Rate (VDR) technique. VDR, in contrast to the currently adopted Constant Data Rate (CDR) approach, enables the optimization of the average throughput during a LEO pass over the optical ground station (OGS). The analysis addresses both critical link level aspects, such as receiver (time, frame, and amplitude) synchronization, as well as demonstrates the benefits stemming from employing VDR at system level
Supplemental Material, Video_2-Dynamic_air_bronchograms_(1) - Accuracy and Applications of Lung Ultrasound to Diagnose Ventilator-Associated Pneumonia: A Systematic Review
No full textSupplemental Material, Video_2-Dynamic_air_bronchograms_(1) for Accuracy and Applications of Lung Ultrasound to Diagnose Ventilator-Associated Pneumonia: A Systematic Review by Leonardo Jönck Staub, Roberta Rodolfo Mazzali Biscaro, and Rosemeri Maurici in Journal of Intensive Care Medicine</p
Greenery vs traditional envelope: a life cycle assessment
No full textIn last decades, environmental aspects and in particular energy consumptions related to whole building life cycle have become an important field of research both at institutional level and in the discussions of a public opinion which is increasingly sensible to these aspects. At the same time new kind of building architectural envelopes have spread and diffuse. Among these particular claddings a vertical greenery called Living Wall, find a place. A Living Wall is a vertical garden sawn on a felt which is fixed upon an artificial structure directly installed on the building envelope. A contribution to the reduction of the so called Urban Heat Island effect is given by the cladding itself thanks to different aspects such as low absorption of solar radiation, evapotranspiration phenomenon and high emissivity of the plants. It is demonstrated that green claddings highly reduce the impinging of solar radiation on the building envelope with direct reductions of cooling energy consumption during the summer period. However Living Walls directly interact with the whole life cycle assessment adding environmental costs due to their manufacturing processes. The aim of this work is to compare a Living Wall against a traditional wall by means of a cradle to grave LCA analysis. Usually the assessment of energy consumptions of the building and its interaction with the built environment are only evaluated during its operating period, excluding, as a matter of fact, the amount of energy related to the processes before the operating period. This energy is called embodied energy and it is a key parameter to evaluate the actual goodness and environmental impact of a design solution. In this work, a standard office building made up of a traditional envelope of masonry wall with external insulation is considered and compared, in terms of Life Cycle Assessment, against the same wall with a Living Wall cladding installed on it. Different Window-To-Wall Ratio and insulation levels have been considered in order to cover different existing cases
Acute hepatitis in course of rotavirus gastroenteritis: a case report.
No full textWe report a case of an immunocompetent child with acute rotavirus gastroenteritis who developed an acute liver damage during infection. Acute rotavirus-related hepatitis has been previously described in immunodeficient children, but never in a normal child
Supplemental Material, Video_1-Small_subpleural_consolidation - Accuracy and Applications of Lung Ultrasound to Diagnose Ventilator-Associated Pneumonia: A Systematic Review
No full textSupplemental Material, Video_1-Small_subpleural_consolidation for Accuracy and Applications of Lung Ultrasound to Diagnose Ventilator-Associated Pneumonia: A Systematic Review by Leonardo Jönck Staub, Roberta Rodolfo Mazzali Biscaro, and Rosemeri Maurici in Journal of Intensive Care Medicine</p
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Searching for swept-up hydrogen and helium in the late-time spectra of 11 nearby Type Ia supernovae
No full textThe direct detection of a stellar system that explodes as a Type Ia supernova (SN Ia) has not yet been successful. Various indirect methods have been used to investigate SN Ia progenitor systems but none have produced conclusive results. A prediction of single-degenerate models is that H- (or He-) rich material from the envelope of the companion star should be swept up by the SN ejecta in the explosion. Seven SNe Ia have been analysed to date looking for signs of H-rich material in their late-time spectra and none were detected. We present results from new late-time spectra of 11 SNe Ia obtained at the Very Large Telescope using XShooter and FORS2. We present the tentative detection of H? emission for SN 2013ct, corresponding to ?0.007 M? of stripped/ablated companion star material (under the assumptions of the spectral modelling). This mass is significantly lower than expected for single-degenerate scenarios, suggesting that >0.1 M? of H-rich is present but not observed. We do not detect H? emission in the other 10 SNe Ia. This brings the total sample of normal SNe Ia with non-detections (<0.001–0.058 M?) of H-rich material to 17 events. The simplest explanation for these non-detections is that these objects did not result from the explosion of a CO white dwarf accreting matter from a H-rich companion star via Roche lobe overflow or symbiotic channels. However, further spectral modelling is needed to confirm this. We also find no evidence of He-emission features, but models with He-rich companion stars are not available to place mass limits
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
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