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Lorenzo Benedetti,Lorenzo Bernardini,Antonio Argentino,Gabriele Cazzulani,Claudio Somaschini,Marco Belloli Techno-Press 2022 Structural monitoring and maintenance Vol.9 No.4
Bridge structural health monitoring with the aim of continuously assessing structural safety and reliability represents a topic of major importance for worldwide infrastructure managers. In the last two decades, due to their potential economic and operational advantages, drive-by approaches experienced growing consideration from researcher and engineers. This work addresses two technical topics regarding indirect frequency estimation methods: bridge and vehicle dynamics overlapping, and bridge expansion joints impact. The experimental campaign was conducted on a mixed multi-span bridge located in Lombardy using a Ford Galaxy instrumented with a mesh of wireless accelerometers. The onboard time series were acquired for a number of 10 passages over the bridge,performed at a travelling speed of 30 km/h, with no limitations imposed to traffic. Exploiting an ad-hoc sensors positioning, pitch vehicle motion was compensated, allowing to estimate the first two bridge bending frequencies from PSD functions; moreover, the herein adopted approach proved to be insensitive to joints disturbance. Conclusively, a sensitivity study has been conducted to trace the relationship between estimation accuracy and number of trips considered in the analysis. Promising results were found, pointing out a clear positive correlation especially for the first bending frequency.
The Correlation between the Peak Photon Energy and the Radiated Energy in Gamma-Ray Bursts
Lorenzo Amati 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.5
The correlation between the photon energy at which the redshift-corrected νFν spectrum peaks (hereafter called “peak energy”, Ep,i) and the isotropic equivalent radiated energy (Eiso) is one of the most intriguing and debated peaces of observational evidence in Gamma-Ray Burst (GRB)astrophysics. I present the updated Ep,i – Eiso correlation and discuss its main implications for the physics and the geometry of the GRB emission, with particular emphasis on the properties of Swift GRBs and the location in the Ep,i – Eiso plane of sub-energetic long GRBs, GRB/SN events, short GRBs and the recently discovered sub-class of long GRBs without association with a hypernova.
Iliac Vein Injury Due to a Damaged Hot Shears™ Tip Cover During Robot Assisted Radical Prostatectomy
Lorenzo, Enrique Ian,Jeong, Wooju,Park, Sangun,Kim, Won Tae,Hong, Sung Joon,Rha, Koon Ho Yonsei University College of Medicine 2011 Yonsei medical journal Vol.52 No.2
<P>We report a rare case of vascular injury secondary to a damaged Hot Shears™ tip cover. Two 1 mm holes in the tip cover resulted in perforations in the obturator and external iliac veins during pelvic node dissection. Bleeding was controlled with bipolar coagulation and a 5 mm metal clip in the obturator and iliac vein, respectively. The rest of the procedure was completed uneventfully. Frequent integrity assessment of this accessory is necessary. Its function is important in order to carry out safe dissection in proximity to delicate structures. When injuries arise from areas not directly involved in the dissection, immediate inspection of the instruments should be mandatory.</P>
Lorenzo Madrazo,Claire B. Lee,Meghan McConnell,Karima Khamisa,Debra Pugh 한국보건의료인국가시험원 2019 보건의료교육평가 Vol.16 No.-
Student-led peer-assisted mock objective structured clinical examinations (MOSCEs) have been used in various settings to help students prepare for subsequent higher-stakes, faculty-run OSCEs. MOSCE participants generally valued feedback from peers and reported benefits to learning. Our study investigated whether participation in a peer-assisted MOSCE affected subsequent OSCE performance. To determine whether mean OSCE scores differed depending on whether medical students participated in the MOSCE, we conducted a between-subjects analysis of variance, with cohort (2016 vs. 2017) and MOSCE participation (MOSCE vs. no MOSCE) as independent variables and the mean OSCE score as the dependent variable. Participation in the MOSCE had no influence on mean OSCE scores (P=0.19). There was a significant correlation between mean MOSCE scores and mean OSCE scores (Pearson r=0.52, P<0.001). Although previous studies described self-reported benefits from participation in student-led MOSCEs, it was not associated with objective benefits in this study.
A Velocity-Based Approach to Noninvasive Methodology for Urodynamic Analysis
Lorenzo Lotti,Pietro Spatafora,Vincenzo Li Marzi,Giulio Nicita,Enio Paris,Sergio Serni 대한배뇨장애요실금학회 2023 International Neurourology Journal Vol.27 No.1
Purpose: To date, invasive urodynamic investigations have been used to define most terms and conditions relating to lower urinary tract symptoms. This invasiveness is almost totally due to the urethral catheter. In order to remove this source of discomfort for patients, the present study investigated a noninvasive methodology able to provide diagnostic information on bladder outlet obstruction or detrusor underactivity without any contact with the human body. Methods: The proposed approach is based on simultaneous measurements of flow rate and jet exit velocity. In particular, the jet exit kinetic energy appears to be strongly related to bladder pressure, providing useful information on the lower urinary tract functionality. We developed a new experimental apparatus to simulate the male lower urinary tract, thus allowing extensive laboratory activities. A large amount of data was collected regarding different functional statuses. Results: Experimental results were compared successfully with data in the literature in terms of peak flow rate and jet exit velocity. A new diagram based on the kinetic energy of the exit jet is proposed herein. Using the same notation as a Schäfer diagram, it is possible to perform noninvasive urodynamic studies. Conclusions: A new noninvasive approach based on the measurement of jet exit kinetic energy has been proposed to replace current invasive urodynamic studies. A preliminary assessment of this approach was carried out in healthy men, with a specificity of 91.5%. An additional comparison using a small sample of available pressure-flow studies also confirmed the validity of the proposed approach.
From Media to Transmedia: Transforming Teaching and Learning Strategies in a Digital Culture
Lorenzo Galés, Neus 영상영어교육학회 2019 영상영어교육 (STEM journal) Vol.20 No.4
During the last century, education through media has evolved and generalized both in formal and informal learning contexts. Using films in the classroom helped minimize the differences between academic studies, guided education, and self-access (learner’s autonomous access to content). Today, teaching through media implies using new technologies such as mobile apps, video games, autonomous learning platforms or social media in the classroom. Educators will find new challenges and opportunities if they manage this transmedia universe in their professional development. Transmedia activities are connected to developing multi-literacies in a collective digital culture, active citizenship in a sustainable world, and ethical awareness for community building. Traditional individual language-learning skills (speaking, reading, listening, writing) are usually seen as the basics of communication, but academic research shows that transliteracy, inter-comprehension and plurilingual skills are needed for cultural awareness, social interaction and global communicative competence (including abilities such as debating, mediating, coaching, coding and decoding). Evolving from educational media to transmedia requires changing teaching attitudes and adopting specific approaches, techniques and tools to generate much more interactive activity, integrated tasks and integrative projects. In this communicational ecosystem, researchers explore new tools and strategies to illustrate learning processes, teachers discover different approaches methodologies, and students learn to participate in their own learning process.
CASE REPORT : Dermatobia hominis: Small Migrants Hidden in Your Skin
( Lorenzo Zammarchi ),( Riccardo Viligiardi ),( Marianne Strohmeyer ),( Alessandro Bartoloni ) 대한피부과학회 2014 Annals of Dermatology Vol.26 No.5
Myiasis is a parasitic infestation of vertebrate animal tissues due to maggots of two-winged flies (Diptera) that feed on living or necrotic tissue. Dermatobia hominis occurs widely in tropical parts of Latin America; it is the most common cause of furuncular myiasis in this region. The continuous increase in international travel has increased the possibility of observing this pathology outside endemic countries, especially in travelers returning from the tropics. If clinicians are aware of the possibility of the disease and its treatment options, this dermatosis can be easily managed. However, diagnostic delay is very common because the disease is often misdiagnosed as a bacterial skin infection. Here, we report 2 cases of furuncular myiasis caused by D. hominis in travelers returning to Italy from Latin America. Surgical and noninvasive treatment approaches are also described. (Ann Dermatol 26(5) 632∼635, 2014)