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MPEG-Past and Future

通信学报 1995年第5期16卷 46-59页

作者： leonardo Chiariglione (CSELT, Italy) CSEL T 意大利

ＭＰＥＧ－ＰａｓｔａｎｄＦｕｔｕｒｅ￥ＬｅｏｎａｒｄｏＣｈｉａｒｉｇｌｉｏｎｅ（ＣＳＥＬＴ，Ｉｔａｌｙ）Ａｂｓｔｒａｃｔ：Ｔｈｅｄｒｅａｍｏｆｄｉｇｉｔａｌａｕｄｉｏａｎｄｖｉｄｅｏａｎｄ，ｏｆｌａｔｅ，ｍｕｌｔｉｍ... 详细信息

ＭＰＥＧ－ＰａｓｔａｎｄＦｕｔｕｒｅ￥ＬｅｏｎａｒｄｏＣｈｉａｒｉｇｌｉｏｎｅ（ＣＳＥＬＴ，Ｉｔａｌｙ）Ａｂｓｔｒａｃｔ：Ｔｈｅｄｒｅａｍｏｆｄｉｇｉｔａｌａｕｄｉｏａｎｄｖｉｄｅｏａｎｄ，ｏｆｌａｔｅ，ｍｕｌｔｉｍｅｄｉａｉｎｆｏｒｍａｔｉｏｎｆｒ...

关键词： international standards MPEG Uideo coding audio coding

Melting behavior and globular microstructure formation in semi-solid CoCrCuxFeNi high-entropy alloys

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Journal of Materials Science & Technology 2020年第17期52卷 207-217页

作者： Kaio Niitsu Campo Caio Chaussêde Freitas leonardo Fanton Rubens Caram University of Campinas School of Mechanical EngineeringSPBrazil

High-entropy alloys can be compelling raw materials for semi-solid *** the present study,the influence of the Cu content on the melting behavior and semi-solid microstructure of CoCrCuxFeNi(x=0,1,2,3)alloys was ***-melted samples were cross-rolled at room temperature and then isothermally treated at 1175℃in the semi-solid state for 300 *** characterization showed that the alloys containing Cu were formed by two fcc ***,the increase in Cu content also led to an increase in the volumetric fraction of the Cu-rich *** solidification,this phase,which is the last to form,nucleates and epitaxially grows on the Cu-lean *** the studied CoCrCuFeNi alloys exhibited the same melting *** Cu-rich phase melts at approximately 1120℃,whereas the Culean phase melts at approximately 1350℃,providing a suitable processing temperature range of more than 200℃.The semi-solid microstructures were considerably refined and globular regardless of the alloy composition,being suitable for semi-solid ***,each fcc phase exhibited roughly the same composition under the different processing *** Cu content in the Cu-lean phase was approximately 10 at.%,while Co,Cr,Fe,and Ni were in an approximately equiatomic ***,the Cu content was between 80 at.%and 86 at.%in the Cu-rich *** isothermal treatment of the CoCrCu3FeNi alloy at a higher temperature(1300℃)only caused the globules to *** conclusion,this work showed that these alloys can be potential candidates for semi-solid processing.

关键词： Semi-solid processing Thixoforming High-entropy alloys Microstructure

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Management of gastro-esophageal reflux disease:Practice-oriented answers to clinical questions

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World Journal of Gastroenterology 2023年第5期29卷 773-779页

作者： leonardo Frazzoni Lorenzo Fuccio Rocco Maurizio Zagari Department of Digestive Diseases IRCCS Azienda Ospedaliero-Universitaria di Bologna Policlinico S OrsolaBologna 40138Italy Department of Medical and Surgical Sciences University of BolognaBologna 40138Italy

Gastro-esophageal reflux disease(GERD)is a condition which is frequently faced by primary care physicians and *** management of GERD is crucial to maximise both patient care and resource *** fact,the management of patients with GERD is complex and poses several questions to the clinician who faces them in clinical *** instance,many aspects should be considered,including the appropriateness of indication to endoscopy,the quality of the endoscopic examination,the use and interpretation of ambulatory reflux testing,and the choice and management of anti-reflux treatments,i.e.,protonpump inhibitors and *** of the present review was to provide a comprehensive update on the clinical management of patients with GERD,through a literature review on the diagnosis and management of patients with GER *** details,we provide practice-oriented concise answers to clinical questions,with the aim of optimising patient management and healthcare resource use.

关键词： Gastro-esophageal reflux disease Diagnosis Management Proton-pump inhibitor

Interleukin 28B polymorphisms as predictor of response in hepatitis C virus genotype 2 and 3 infected patients

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World Journal of Gastroenterology 2013年第47期19卷 8924-8928页

作者： Alessandra Mangia leonardo Mottola Rosanna Santoro Liver Unit-IRCCS "Casa Sollievo della Sofferenza"San Giovanni Rotondo71013 FGItaly

Single nucleotide polymorphisms near the interleukin28B(IL-28B)gene have been identified as strong predictors of both spontaneous or Peg-interferon(Peg-IFN)and ribavirin(RBV)induced clearance of hepatitis C virus(HCV).Several studies have shown that,in patients with genotype 1(GT-1),rs12979860 C/C and rs8099917T/T substitutions are associated with a more than twofold increase in sustained virological response rate to Peg-IFN and RBV *** new treatment regimens based on combination of DAA with or without IFN are in the approval phase,until combination regimens with a backbone of Peg-IFN will be used,we can expect that IL28B holds its *** clinical relevance of IL28B genotyping in treatment of patients infected with HCV genotype 2(GT-2)and 3(GT-3)remains ***,after a careful examination of the available literature,we analyzed the impact of IL28B in GT-2 *** size of the studies and GT-2 and GT-3 proportion were *** algorithm for the practical use of IL28B in these patients was suggested at the aim of optimizing treatment.

关键词： Hepatitis C virus Genotype 3 Interleukin 28B Liver cirrhosis

Esophagitis and its causes:Who is “guilty” when acid is found “not guilty”?

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World Journal of Gastroenterology 2017年第17期23卷 3011-3016页

作者： laurino grossi antonio francesco ciccaglione leonardo marzio g.d’annunzio university of chieti-pescara school of gastroenterology digestive sciences c/o ospedale spirito santo

Esophagitis is mainly a consequence of gastroesophageal reflux disease, one of the most common diseases affecting the upper digestive tract. However the esophageal mucosa can also be targeted by some infectious, systemic or chemical conditions. Eosinophilic esophagitis(Eo E) is an immune-mediated inflammatory disease, characterized by eosinophilic infiltration in the mucosa. Esophageal localization of Crohn's disease is not very common, but it should always be considered in patients with inflammatory bowel disease complaining of upper digestive tract symptoms. There are also forms of infectious esophagitis(e.g., Herpes simplex virus or Candida albicans) occurring in patients with a compromised immune system, either because of specific diseases or immunosuppressive therapies. Another kind of damage to esophageal mucosa is due to drug use(including oncologic chemotherapeutic regimens and radiotherapy) or caustic ingestion, usually of alkaline liquids, with colliquative necrosis and destruction of mucosa within a few seconds. Dysphagia is a predominant symptom in Eo E, while infectious, drug-induced and caustic damages usually cause chest pain and odynophagia. Endoscopy can be useful for diagnosing esophagitis, although no specific pattern can be identified. In conclusion when a patient refers upper gastrointestinal tract symptoms and the diagnosis of gastro-esophageal reflux disease is not convincing we should always carefully investigate the patient's clinical history to consider possibilities other than the gastric refluxate.

关键词： Esophagitis Gastroesophageal reflux disease Eosinophilic esophagitis Crohn’s disease Herpes simplex virus Manometry Candida Caustic Dysphagia Chest pain

The Puesto Piris Formation: Evidence of basin-development in the North Patagonian Massif during crustal extension associated with Gondwana breakup

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Geoscience Frontiers 2019年第1期10卷 299-314页

作者： leonardo Strazzere Daniel A.Gregori leonardo Benedini Paulo Marcos Mercedes V.Barros Mauro C.Geraldes Cecilia Pavon Pivetta Instituto Geológico del Sur Consejo Nacional de Investigaciones Científicas y Técnicas Av Cátedra de Geología Minera Universidad Nacional del Sur Cátedra de Geología Argentina Universidad Nacional del Sur Av Cátedra de Geofísica Departamento de Geología Universidad Nacional del Sur Av Departamento de Geología Regional Facultad de Geología Universidad Estatal de Rio de Janeiro

The Marifil Volcanic Complex, exposed in the eastern North Patagonian Massif, Argentina, includes up to 550 m of red conglomerates, sandstones, black siltstones, limestones, and reworked tuff of the Puesto Piris Formation. The basal part of this unit, which was deposited in high-gradient topographic relief, is composed of conglomerates and sandstones with thin layers of reworked tuffs. The lithofacies associations of the basal part indicate that the depositional mechanisms were mantled and gravitational *** middle part of the unit consists of fine sandstones, limestones, and black siltstones that were deposited in low-energy fluvial and lacustrine environments. The outcrops are located along the NEe SW direction and the major thickest units represented by limestones and siltstones, occur near the southeastern border of this NEeS W depocenter. Since the rhyolitic and trachytic lava flows and tuffs of the Marifil Volcanic Complex are interbedded with the sedimentary sequences of the Puesto Piris Formation,both units are coeval. Zircon Ue Pb age was obtained for a trachytic lava flow(193.4 ±3.1 Ma) suggesting that sedimentation and volcanism are Sinemurian. This extensional episode was recorded in the eastern,western, and southwestern sectors of the North Patagonian Massif, and is possibly associated with the Gondwana supercontinent breakup.

关键词： Puesto Piris Formation Early Jurassic North Patagonian Massif

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Drivers and barriers to energy-efficient technologies(EETs)in EU residential buildings

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能源与人工环境(英文) 2021年第3期2卷 290-301页

作者： Clara Camarasa Lokesh Kumar Kalahasthi leonardo Rosado Sustainable Building Group Chalmers University of TechnologyGothenburgSweden

To achieve carbon targets,the European Union(EU)aims to promote nearly zero-energy buildings(nZEB).To enable the necessary transition,technical solutions need to converge with socio-economic factors,such values and awareness of stakeholders involved in the decision-making *** this light,the aim of this paper is to characterise perceived drivers and barriers to nine energy-efficient technologies(EET),according to key decision-makers’and persuaders of the technology selection in the EU residential building *** are collected across eight EU countries,***(BE),Germany(DE),Spain(ES),France(FR),Italy(IT),Netherlands(NL),Poland(PL),and United Kingdom(UK).The stakeholders’selected are architects,construction companies,engineers,installers and demand-side *** from a multi-country survey is analysed to calculate the share of 15 drivers and 21 barriers(aggregated to 5 groups),being selected for each EET and *** 5 groups considered to analyse drivers and barriers are environmental,technical,economic,social,*** perceived barriers and drivers were further studied for their association across the countries using the Pearson’s Chi2 and a Cramer’s V *** results demonstrate that across all EETs and countries,the technical and economic driver groups are perceived to have the highest potential to increase the implementation rate of *** terms of barriers,economic aspects are seen as the foremost reason that EET are not scaling *** both drivers and barriers legal aspects are the least often *** overall the barrier groups show significant variation across countries compared to driver *** findings provide an evidence-basis to better understand arguments in favour and against specific EETs and,in this way,support policy makers and other interested parties to increase the market share of the selected solutions.

关键词： Energy efficiency Technology diffusion Technology selection Residential building stock Drivers Barriers

leonardo da Vinci, 1452-1519

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High temperature tribological behaviour of PVD coated tool steel and aluminium under dry and lubricated conditions

作者： (author.)Zollner Frank (1452-1519.)da Vinci·leonardo

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Friction 2021年第4期9卷 802-821页

作者： Justine DECROZANT-TRIQUENAUX leonardo PELCASTRE Cedric COURBON Braham PRAKASH Jens HARDELL Division of Machine Elements Lulea University of TechnologySE-97187Sweden Universite de Lyon CNRSEcole Nationale d'lngenieurs de Saint-EtienneLTDS UMR5513F-42023France Department of Mechanical Engineering Tsinghua UniversityBeijing100084 China

Aluminium alloys are commonly used as lightweight materials in the automotive *** non-ferrous family of metallic alloys offers a high versatility of properties and *** reduce weight and improve safety,high strength-to-weight ratio alloys(e.g.6XXX and 7XXX),are increasingly implemented in ***,these alloys exhibit low formability and experience considerable springback during cold forming,and are therefore hot *** forming,severe adhesion(***)of aluminium onto the die surface takes *** phenomenon has a detrimental effect on the surface properties,geometrical tolerances of the formed parts and maintenance of the *** effect of surface engineering as well as lubricant chemistry on galling has not been sufficiently ***-like carbon(DLC)and CrN physical vapour deposition(PVD)coated steel have been studied to reduce aluminium ***,the interaction between lubricants and PVD coatings during hot forming of aluminium alloys is not yet fully *** present study thus aims to characterise the high temperature tribological behaviour of selected PVD coatings and lubricants during sliding against aluminium *** objectives are to first select promising lubricant-coating combinations and then to study their tribological response in a high-temperature reciprocating friction and wear *** and lubricated tests were carried out at 300℃ using a commercial polymer *** using DLC,CrN,CrTiN,and CrAIN coated tool steel were compared to uncoated tool steel reference *** initial and worn test specimen surfaces were analysed with a 3-dimensional(3D)optical profiler,scanning electron microscope(SEM)and energy dispersive X-ray spectroscope(EDS)as to understand the wear *** results showed formation of tribolayers in the contact zone,reducing both friction and *** stability of these layers highly depends on both the coatings'roughness and chemical affinity towards

关键词： high temperature tribology aluminium lubrication physical vapour deposition(PVD)coatings material transfer adhesion

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