176,776 research outputs found
Da Ghigo alla moglie di Forese, da Rustico a Dante (e a Cavalcanti)
No full textPartendo dal sonetto di Rustico Filippi Io fo ben boto a Dio, il saggio individuala peculiarità dello stile comico duecentesco nel rapporto molto stretto tra te-sto letterario e pubblico comunale. La capacità retorica di Rustico fa sì che que-sto modello testuale finisca col diventare un riferimento nella Firenze di fineDuecento lasciando le proprie tracce in Dante, nel Fioree in Cavalcanti.Taking Rustico Filippi’s sonnet Io fo ben boto a Dioas a point of departure, thisessay identifies the peculiarity of the thirteenth-century comic style in the closerelationship between literary texts and their readers in the age of the commune.This textual model became a point of reference in Florence due to Rustico’srhetorical ability and proved influential for Dante, Cavalcanti and the anony-mous author of Fior
3D active dynamic actuation model for offshore cranes
No full textThe handling of offshore payloads is a critical operation that presents numerous challenges, in particular related to the required precision in controlling their oscillations in a safe and accurate manner. The uncontrolled payload oscillations induced by the rolling movement of the vessel have been historically mitigated by the experience of on-deck operators by means of taglines. The availability of experienced personnel is not always present, and a manual control operation still presents inconsistent performances and a high risk for the safety of men and machines. This study presents a novel approach to an antisway control conceived to mitigate such problems and possibly to automate some of the operations concerning the payload sway control that are currently done manually. In particular, a system consisting of a translating trolley actuated through a proportional–integral–derivative controller is taken into consideration to mitigate the oscillations induced by the vessel's rolling and pitching motion onto a three-dimensional 8 degrees of freedom with double-pendulum model representing the hanging payload. The study is completed through an analysis aimed to characterize the bandwidth and frequency response of the controlled closed-loop system and highlight all the potential areas of interest for which further characterization is needed
Dynamic actuation model for vibration reduction in offshore cranes
No full textThe handling of offshore payloads is a critical operation that presents numerous challenges, in particular related to the required precision in controlling their oscillations in a safely and accurate manner. This study presents a preliminary approach to an anti-sway control conceived to mitigate such problems and possibly to automate some of the operations concerning the payload sway control that are currently done manually. In particular, a system consisting of a translating trolley actuated through a PID controller is taken into consideration to mitigate the oscillations induced by the vessel’s rolling motion onto a simplified two-dimensional and 4 degrees of freedom double-pendulum model representing the hanging payload. A three-dimensional double-pendulum model is also taken into account, in order to have a more representative case with respect to the two-dimensional one
Twin to twin transfusion syndrome presenting at early stages: is there still a possibile role for amnioreduction.
No full textOBJECTIVE: To assess the rate of resolution or progression after first line treatment with amnioreduction and related outcome of pregnancies with twin-to-twin transfusion syndrome (TTTS) diagnosed at stages I-II.
METHOD: Data on 34 monochorionic diamniotic twin pregnancies presenting with TTTS at stage I-II before 26 weeks of gestation were collected retrospectively (1999-2006). All patients underwent at least one amnioreduction. The outcome and the results of neurological follow-up of surviving twins were analysed in relation to the regression or progression of the disease after treatment.
RESULTS: Fourteen cases (41%) resolved after treatment while 18 cases (53%) progressed. In two patients immediate complications occurred within one week after amnioreduction; at least one infant survived in 85.3% of cases and there was double survival in 58.8%. Double survival was significantly better in cases that regressed (85.7%) compared with those cases that progressed (44.4%). None of the surviving infants in the group of cases with regression showed major neurological abnormalities.
CONCLUSION: In our study, one-third of patients with stage I-II TTTS regressed after a single amnioreduction, and pregnancies with resolution of TTTS usually had a favourable outcome
Un progetto di lavoro sullo «Stato rustico»
No full textPresentazione di un progetto di lavoro sullo "Stato rustico" dell'Imperiali, a margine dell'edizione critica curata da Ottavio Besomi. L'indagine sull'ampia messe degli autori secenteschi coinvolti nell'elogio dell'autore e dell'opera, nel segno di una strategia di promozione tutt'altro che casuale, approda poi all'indicazione di modalità e obiettivi di un possibile, arduo commento scientifico all'opera
Effects of Composite Attachments on Orthodontic Clear Aligners Therapy: A Systematic Review
Get PDFThis systematic review aims to highlight the differences between different clear aligner therapies that differ in the presence of attachments or in attachment configuration. Eight electronic databases were searched up to March 2020. Two authors independently proceeded to study selection, data extraction, and risk of bias assessment. The analysis of the results was carried out examining six groups of movements (mesio-distal tipping/bodily movement; anterior bucco-lingual tipping/root torque; posterior bucco-lingual tipping/expansion; intrusion; extrusion; rotation). Five clinical trials were selected and all of them showed a medium risk of bias. Literature showed that attachments mostly increase the effectiveness of orthodontic treatment with clear aligners, improving anterior root torque, rotation, and mesio-distal (M-D) movement; they are also important to increase posterior anchorage. However, some articles showed contradictory or not statistically significant results. Attachments also seem to improve intrusion, but the evidence about this movement, as well as extrusion, is lacking. No studies evaluated posterior bucco-lingual tipping/expansion. Further clinical trials are strongly suggested to clarify the influence of attachments and their number, size, shape, and position on each orthodontic movement
Il rilancio dell’apprendistato di primo livello
No full textSOMMARIO: 1. L’apprendistato a 15 anni: una polemica male impostata. – 2. L’assunzione in apprendistato dei minorenni. – 3. La novità del collegato lavoro in materia di apprendistato di primo livello. – 4. I necessari passaggi normativi e istituzionali per la piena operatività dell’apprendistato di primo livello
Cesarean section plus delayed cord clamping approach in the perinatal management of congenital high airway obstruction syndrome (CHAOS) : a case report
No full textIn this case, we describe a newborn with prenatal diagnosis of congenital high airway obstruction syndrome (CHAOS), successfully managed with a cesarean section with delayed cord clamping 180 seconds. In case of prenatal diagnosis of CHAOS, prompt airway intervention at delivery allows survival of this otherwise fatal condition. Ex utero intrapartum treatment (EXIT) is considered the elective procedure to secure the fetal airway before the baby is completely separated from the maternal circulation. In cases where the EXIT procedure is not possible for maternal reasons (Ballantyne's syndrome), delayed cord clamping may serve as an alternative method to manage CHAOS
Root Injury During Interradicular Insertion is the most Common Complication Associated with Orthodontic Miniscrews
No full textArticle Title and Bibliographic Information: Complications reported with the use of orthodontic miniscrews: A systematic review. Giudice AL, Rustico L, Longo M, Oteri G, Papadopoulos MA, Nucera R. Korean J Orthod 2021 May 25;51(3):199–216. doi: 10.4041/kjod.2021.51.3.199. PMID: 33984227. Source of Funding: There is no information about funding. Type of Study/Design: Systematic review
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
Get PDFFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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