85 research outputs found
S.P.610 “SELICE O MONTANARA IMOLESE”: un campo di sperimentazione della sicurezza stradale
No full textÈ noto che le zone di transizione tra ambito extraurbano e urbano costituiscono dei punti critici della rete viaria. È necessario, pertanto, progettarle in sicurezza tenendo conto non solo dell’aspetto funzionale, ma anche della dinamica comportamentale dei conducenti, i cui meccanismi di comprensione, riconoscimento e decisione incidono pesantemente sul rischio di incidente. È possibile, infatti, influenzando la percezione dell’ambiente stradale degli utenti, modificarne la condotta di guida rendendola più sicura. A tal fine uno degli interventi più diffusi è la realizzazione di "porte di accesso" costituite da un restringimento della carreggiata associato a un'opportuna segnaletica verticale e orizzontale. Nella presente memoria, nell'ambito di una convenzione di ricerca tra la Provincia di Bologna e il dipartimento DICAM - Strade dell'Università di Bologna, se ne riporta un esempio realizzato sulla SP 610 “Selice-Montanara”, corredato dalla relativa valutazione dell'efficacia in termini di sicurezza di circolazione
Transformation of Robotics Education in the Era of Covid-19: Challenges and Opportunities
No full textThe COVID-19 pandemic has significantly impacted many aspects of our social and professional life. To this end, Higher Education institutions reacted rather vastly to this unpreceded situation although many issues have been reported in the international literature since the emergence of the first global lockdown. As we are now transitioning back to the ‘normality’, universities and businesses consider the so-called ‘blended’ or ‘hybrid’ model as a means of facilitating the transition phase. In view of this decision, several studies can be identified wherein blended learning scenarios are proposed and described. The present work constitutes such an effort. Precisely, while adjusting the lens to the didactic of Robotics courses, we propose a blended learning model via which the laboratory activities are performed without the physical presence of the students in the physical context. The aforementioned objective is attained under the aid of the Virtual Reality technology coupled with the Digital Twin model. We hope that the ideas presented in this manuscript will motivate and inspire more researchers, instructional designers, and educators to consider the adoption of such alternative instructional techniques to mitigate the shortcomings that the remote education setting brings and further to improve the overall learning experience
Modello generalizzato di trasformatore variatore per lo studio di reti dissimmetriche col metodo Correction Current Injection
No full textLa tesi di laurea si pone l'obiettivo di realizzare un modello di trasformatore adatto allo studio dei flussi di potenza di reti elettriche di distribuzione dissimmetriche con il metodo Correction Current Injection, algoritmo che si è dimostrato essere molto efficace con questo tipologie di reti, rispetto ai meglio noti metodi basati su Newton-Raphsonope
Use of the Fluid Challenge in Critically Ill Adult Patients
No full textThe fluid challenge (FC) aims at identifying patients in whom fluid administration improves hemodynamics. Although the FC has been extensively studied, the implementation and definition of improvement are not standardized. This systematic review of studies published between January 1, 1994 and December 31, 2014 characterizes these key components of the FC for critically ill adult patients, as described in the medical literature in the last 20 years. A literature search was performed using MEDLINE, Embase, and Cochrane. For each study, data were collected on study design, study size, study setting, patient population, and how the FC was administered. Eligibility criteria for FC were (1) the infusion of a definite quantity of fluid, (2) of a specific type, (3) in a fixed time period (expressed as either span or infusion rate), (4) with a defined hemodynamic variable as the target, and (5) for a predetermined threshold. One hundred fifty-seven full-text manuscripts were extracted from 870 potentially relevant studies. The inclusion criteria were met by 71 studies including 3617 patients. Sixty-six studies were from a single center and 45 were prospective observational in format. The most common amount infused was 500 cc, used by 55 (77.5%) studies. The most commonly infused fluids were colloids (62.0%). In 43 (60.5%) studies, the FC was administered between 20 and 30 minutes. A positive response to fluid administration was defined as an increase ≥15% of cardiac index or cardiac output in 44 (62.6%) studies. Static or dynamic physiologic indices were utilized in a minority of studies (16.9%) and safety limits for interrupting the FC are adopted in 4 (5.6%) studies only. This systematic review indicates that the FC most commonly consists in infusing 500 mL of crystalloids or colloids in 20 to 30 minutes, and considered an increase in cardiac index ≥15% as a positive response. However, definite standards for FC administration and evaluation remain undefined
Into the Wild Childhood: A Study of Wildness in Three 21st-Century Picturebooks
No full textWhile the majority of the ‘wild’ children’s literature presents male human characters, in the 21st century, there is an increasing tendency to publish texts showing a different kind of wildness. In this article, the author analyses three picturebooks published in the 21st century that feature protagonists other than male and/or human: a wild girl (Wild by Emily Hughes, 2012), a pet dog (Such a Good Boy by Marianna Coppo, 2020), and a wild tiger (Mr Tiger Goes Wild by Peter Brown, 2013). She investigates to what extent (if any) non-male and/or non-human wildness in these works differs from the most popular one in children’s literature. The author analyses the concept of wildness in the context of a famous children’s picturebook featuring a wild protagonist, Where the Wild Things Are by Maurice Sendak (1963), and other cultural texts using this motif.available at http://omc.obta.al.uw.edu.pl/publication
Molecular Basis and Diagnostic Approach to Isolated and Syndromic Lateralized Overgrowth in Childhood
No full textObjective: To demonstrate a high-yield molecular diagnostic workflow for lateralized overgrowth (LO), a congenital condition with abnormal enlargement of body parts, and to classify it by molecular genetics. Study design: We categorized 186 retrospective cases of LO diagnosed between 2003 and 2023 into suspected Beckwith-Wiedemann spectrum, PIK3CA-related overgrowth spectrum (PROS), vascular overgrowth, or isolated LO, based on initial clinical assessments, to determine the appropriate first-tier molecular tests and tissue for analysis. Patients underwent testing for 11p15 epigenetic abnormalities or somatic variants in genes related to PI3K/AKT/mTOR, vascular proliferation, and RAS-MAPK cascades using blood or skin DNA. For cases with negative initial tests, a sequential cascade molecular approach was employed to improve diagnostic yield. Results: This approach led to a molecular diagnosis in 54% of cases, 89% of cases consistent with initial clinical suspicions, and 11% reclassified. Beckwith-Wiedemann spectrum was the most common cause, with 43% of cases exhibiting 11p15 abnormalities. PIK3CA-related overgrowth spectrum had the highest confirmation rate, with 74% of clinically diagnosed patients showing a PIK3CA variant. Vascular overgrowth demonstrated significant clinical overlap with other syndromes. A molecular diagnosis of isolated LO proved challenging, with only 21% of cases classifiable into a specific condition. Conclusions: LO is underdiagnosed from a molecular viewpoint and to date has had no diagnostic guidelines, which is crucial for addressing potential cancer predisposition, enabling precision medicine treatments, and guiding management. This study sheds light on the molecular etiology of LO, highlighting the importance of a tailored diagnostic approach and of selecting appropriate testing to achieve the highest diagnostic yield
MA_MISS: EVALUATION OF COMPRESSION FACTOR WITH RICE SOFTWARE BY MEANS OF THE ESA WHITEDWARF TOOL
No full textThis document reports on the results of some tests performed to evaluate data compression factors achieved with the ESA WhiteDwarf tool, based on RICE compression algorithm. In order to test the WhiteDwarf tool, three different kinds of data have been used:
1) MA_MISS simulated data, see Table 1A (simulated dark) and 1B (dark from PRISMA);
2) PRISMA data, see Table 2;
3) VIR/Dawn data (single slices or whole cubes), see Table 3A (VIR-VIS channel) and Table 3B (VIR-IR
channel).
Results show that the highest values for the compression factor are found for the dark signals of the PRISMA sensor and VIR-VIS channel, 2.2 and 4.8 respectively. As far as the signal (both simulated and observed) is concerned, the compression factor ranges between 1.3 and 2. Factor 2 is found for the VIR- VIS data, where a more homogenous signal is observed. Factor 1.3 is found for the VIR-IR data, where a higher spectral variability is found. The subtraction of the dark in the signal before performing the compression can increase the compression factor, depending on the variability observed in the dark itself. Housekeeping (HK) data can also impact the compression factors. In order to simulate MA_MISS HK, sets of numbers have been generated randomly or with a low correlation. Tests performed including HK with no correlation (worst case) and of the order of 10% of the science data set, show compression factors varying in the same range of values of those found without considering the HK data (1.3 and 2).
Tests have been performed considering data with 16 bits per sample, as the ESA tool does not allow to compress data with 24 or 32 bits per sample
Dynamic self-navigated 3D whole-heart radial coronary MRA with retrospective acquisition window selection
No full textPractice of piccolo flute: diferences of technical approaches with interpretives purposes
No full textThe piccolo has been used just recently for recitals and chamber music all around the world. Therefore, its presence in the orchestral scene became notable mostly on 20th c. composers, such as Shostakovich. With the recent use of the instrument as a soloist within and without the orchestra, raises the necessity of a specific formation for piccolo, regardless of the flute. Lately, orchestras search for professional piccolo players, not flute players that can eventually play the piccolo when they are required. There is an extensive market out there for a good piccolo player, but it requires a deep knowledge about the instrument. On this paper, I display an investigation of the parameters of the embouchure, sonority, articulation and intonation, grounded in the methods for flute Méthode Complète de Flûte (1958) by Paul Taffanel and Phillipe Gaubert, De La Sonorite: Art et Technique (1934), by Marcel Moyse, and for piccolo The Mazzanti Method (2011), by Nicola Mazzanti and Practice Book for the Piccolo (1988), by Patricia Morris e Trevor Wye. After the research, made by this author, about the difference presented in the methods between the piccolo and flute parameters, were defined the differences in the application of these elements in the piccolo. The partial result was a study of excerpts of selected works for piccolo, considering the particularities found about the execution of the instrument. This research has as goal to help the flutist having a specific piccolo study, respecting its execution particularities and making possible a development that is both effective and independent of the flute.O flautim é um instrumento de uso recente nos palcos de recitais e música de câmara de todo o mundo. Já a sua presença no quadro orquestral passou a ganhar destaque principalmente com compositores do século XX, como Shostakovich. Com a recente utilização do instrumento como solista dentro e fora da orquestra, surge a necessidade de uma formação específica do flautim independente da flauta. Atualmente, orquestras procuram flautinistas profissionais e não mais flautistas que tocam flautim quando necessário. O mercado de trabalho para um bom flautinista é muito extenso, mas isso exige que ele tenha um profundo conhecimento
sobre o instrumento. Neste trabalho, apresento uma investigação a partir dos parâmetros embocadura, sonoridade, articulação e afinação, amparada pelos métodos de flauta Méthode Complète de Flûte (1958), de Paul Taffanel e Phillipe Gaubert, De La Sonorite: Art et Technique (1934), de Marcel Moyse, e de flautim The Mazzanti Method (2011), de Nicola Mazzanti e Practice Book for the Piccolo (1988), de Patricia Morris e Trevor Wye. Após análise das diferenças descritas nos métodos entre os parâmetros do flautim e da flauta, definiram-se as diferenças da aplicação desses elementos no flautim. O resultado parcial foi um estudo de trechos de obras selecionadas para flautim, levando-se em conta as particularidades encontradas sobre a execução do instrumento. Essa pesquisa tem como objetivo ajudar o flautista a um estudo específico do flautim respeitando suas particularidades de execução e possibilitando um desenvolvimento eficaz e independente da flauta
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