54 research outputs found
Filippi, Cesana e Ferrigni inviati speciali all’Esposizione Universale di Vienna
No full textRepresentative of a literary genre that was widespread in the 19th century, are these unpublished chronicles by Filippi, Cesana and Ferrigni as correspondents in Vienna on the occasion of the 1873 World’s Fair. Three completely different outlooks – not only from author to author, but also when the same pen is offered to different newspapers –, united by dense and at the same time entertaining writing; narratives that touch on important issues and facts described with precise observations. Thus we have articles devoted not only to art but also to economics and finance, sociological and philosophical notations, interspersed with humorous moments that testify to an unprecedented side of these three authors
Erratum to: Atraumatic splenic rupture, an underrated cause of acute abdomen (Insights Imaging, 10.1007/s13244-016-0500-y)
No full textThe name of the author Anna Maria Ierardi was rendered wrongly in the original publication but has since been corrected. The publisher apologises for this error and the inconvenience caused
La parola non manca mai quando si possiede l'dea
No full textIl contributo intende dare conto dei criteri oggettivi e soggettivi impliciti nel processo di valutazione di uno scritto letterario e del ruolo rilevante dell'esercizio alla lettura quale momento propedeutico alla produzione letteraria
Wear Behavior of AlSi10Mg Alloy Produced by Laser-Based Powder Bed Fusion and Gravity Casting
No full textHerein, the sliding wear behavior of AlSi10Mg samples realized using laser-based powder bed fusion (LPBF) is investigated via pin-on-disc (PoD) tests, before and after T6 heat treatment. The changes in the microstructure, density, and hardness induced by heat treatment are correlated with the tribological behavior of the alloy. Furthermore, short wear tests are conducted and the resulting wear tracks are investigated through scanning electron microscopy (SEM), equipped with an energy-dispersive spectroscopy (EDS) microprobe to elucidate how the wear mechanisms evolve with sliding distance. For comparison, gravity cast (GC) AlSi10Mg samples are also characterized and tested. The as-built additive manufacturing (AM) sample exhibits the lowest wear rate and coefficient of friction because of its high hardness and relative density, whereas the heat-treated sample shows the worst behavior in comparison with the GC samples. The results suggest a significant influence of porosity on the wear behavior of AM alloys
Wear Behavior of Nb Alloyed Gray Cast Iron for Automotive Brake Disc Application
No full textGray cast iron (GCI) with a pearlitic matrix and type-A graphite remains the most widely used material in the manufacturing of brake discs. To reduce the environmental impact of disc wear during braking, alternative materials and/or compositions to the standard ones are being studied. In this study, the effect of variation in niobium content (0–0.7 wt%) on microstructure and wear behavior of samples machined from brake discs made of hypoeutectic gray cast iron was investigated. The wear behavior of GCI was examined through pin-on-disc (PoD) wear tests using low-metallic-friction material discs as the counterparts. Microstructural analyses and hardness measurements were also conducted to evaluate the effect of Nb addition on the morphology of graphite, eutectic cells, and distribution of carbides. In addition, the wear mechanisms of different samples were evaluated using scanning electron microscope analysis. The results revealed that adding 0.3% of Nb promotes the highest wear resistance of the alloys
Elucidating early CT after pancreatico-duodenectomy: a primer for radiologists
No full textPancreatico-duodenectomy (PD) represents the standard surgical treatment for resectable malignancies of the pancreatic head, distal common bile duct, periampullary region and duodenum, and is also performed to manage selected benign tumours and refractory chronic pancreatitis. Despite improved surgical techniques and acceptable mortality, PD remains a technically demanding, high-risk operation burdened with high morbidity (complication rates 40-50% of patients). Multidetector computed tomography (CT) represents the mainstay modality to rapidly investigate the postoperative abdomen, and to provide a consistent basis for an appropriate choice between conservative, interventional or surgical treatment. However, radiologists require familiarity with the surgically altered anatomy, awareness of expected imaging appearances and possible complications to correctly interpret early post-PD CT studies. This paper provides an overview of surgical indications and techniques, discusses risk factors and clinical manifestations of the usual postsurgical complications, and suggests appropriate techniques and indications for early postoperative CT imaging. Afterwards, the usual, normal early post-PD CT findings are presented, including transient fluid, pneumobilia, delayed gastric emptying, identification of pancreatic gland remnant and of surgical anastomoses. Finally, several imaging examples review the most common and some unusual complications such as pancreatic fistula, bile leaks, abscesses, intraluminal and extraluminal haemorrhage, and acute pancreatitis
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