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Punching of reinforced concrete slab without shear reinforcement: Standard models and new proposal

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Frontiers of Structural and Civil Engineering 2020年第5期14卷 1196-1214页

作者： Luisa PANI flavio STOCHINO Department of Civil Environmental Engineering and ArchitectureUniversity of CagliariCagliari 09123Italy

Reinforced concrete(RC)slabs are characterized by reduced construction time,versatility,and easier space *** structural behavior is not straightforward and,specifically,punching shear strength is a current research *** this study an experimental database of 113 RC slabs without shear reinforcement under punching loads was compiled using data available in the literature.A sensitivity analysis of the parameters involved in the punching shear strength assessment was conducted,which highlighted the importance of the flexural reinforcement that are not typically considered for punching shear *** a discussion of the current international standards,a new proposed model for punching shear strength and rotation of RC slabs without shear reinforcement was *** was based on a simplified load-rotation curve and new failure criteria that takes into account the flexural reinforcement *** experimental database was used to validate the approaches of the current international standards as well as the new proposed *** latter proved to be a potentially useful design tool.

关键词： punching shear strength reinforced concrete slabs reinforcement ratio

Impact characterization on thin structures using machine learning approaches

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Chinese Journal of Aeronautics 2024年第2期37卷 30-44页

作者： flavio DIPIETRANGELO Francesco NICASSIO Gennaro SCARSELLI Department of Engineering for Innovation University of SalentoLecce 73100Italy

Machine learning algorithms are trained and compared to identify and to characterise the impact on typical aerospace panels of different *** activities are conducted to build a proper impacts’*** regression algorithm and artificial neural network are applied and optimised to panels without stringer to test their capability to identify the ***,the algorithms are applied to panels reinforced with stringers that represent a significant increase of complexity in terms of dynamic features of the system to test:the focus is not only on the impact position’s detection but also on the event’s *** the identification of the best algorithm,the corresponding machine learning model is deployed on an ARM processor minicomputer,implementing an impact detection system,able to be installed on board an aerial vehicle,making it a smart aircraft equipped with an artificial intelligence decision-making system.

关键词： Artificial neural network Impact localisation Machine learning Polynomial regression Structural health monitoring

Angioedema associated with Crohn's disease:Response to biologics

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World Journal of Gastroenterology 2012年第34期18卷 4787-4790页

作者： flavio Habal Vivian Huang Department of Gastroenterology University Health NetworkUniversity of TorontoToronto ON M5G 2C4Canada

A 46-year-old female patient with terminal ileum Crohn’s disease and ankylosing spondylitis presented with recurrent angioedema and urticaria. Investigations ruled out hereditary angioedema, and environmental or food allergen triggers. She was diagnosed with chronic idiopathic urticaria with angioedema, and was treated with a trial of intravenous immunoglobulin immunotherapy, danazol, prednisone and hydroxyzine. Due to ongoing bowel and arthritic complaints, she was started on infliximab infusions and within 2 treatments, she had complete resolution of the angioedema and urticaria, as well as of the bowel and arthritic symptoms. Unfortunately she developed allergic reactions to the infliximab and was switched to another anti-tumor necrosis factor （TNF）-a agent, adalimumab. Since then, she has had no further angioedema or urticaria, and her Crohn’s disease has been quiescent. This is the first known case report of chronic idiopathic urticaria with angioedema coexistent with Crohn’s disease that was successfully treated with anti-TNF-α agents.

关键词： Angioedema Anti-tumor necrosis factor-α Biologics Crohn's disease Cytokines Inflammatorybowel disease Infliximab Urticaria

Reduction of Protein Networks Models by Passivity Preserving Projection

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Communications in Theoretical Physics 2013年第8期60卷 247-257页

作者： Luca Mesin flavio Canavero Lamberto Rondoni Department of Electronics and Telecommunications Politecnico di TorinoTorinoItaly Department of Mathematical Sciences Politecnico di Torinoand INFN Sezione di TorinoTorinoItaly

Reduction of complex protein networks models is of great *** accuracy of a passivity preserving algorithm (PRIMA) for model order reduction (MOR) is here tested on protein networks,introducing innovative variations of the standard PRIMA method to fit the problem at *** reduction method does not require to solve the complete system,resulting in a promising tool for studying very large-scale models for which the full solution cannot be *** mathematical structure of the considered kinetic equations is *** constant the reduction factor,the approximation error is lower for larger systems.

关键词： model order reduction chemical kinetics

Ultrastructural features of the hypopharyngeal glands in the social wasp Polistes versicolor （Hymenoptera： Vespidae）

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Insect Science 2008年第3期15卷 277-284页

作者： Fabio Barros Britto flavio Henrique Caetano Universidade Estadual Paulista Julio de Mesquita Filho Instituto de Bioci~ncias de Rio Claro - Depto. de Biologia Rio Claro SP Brazil

The wasps of the genus Polistes have been considered the key to understanding the evolution of social behavior in Hymenoptera. Several studies have shown that the development of organized insect societies was accompanied by the evolution of structures like exocrine glands, which became specialized to perform specific functions. This article investigates the ultrastructural and cytochemical features of the hypopharyngeal glands of Polistes versicolor. These glands have been studied in depth in social bees, where they occur only in nurses and produce the royal jelly. Our results＇ revealed that these glands basically did not vary among individuals or between sexes. They are constituted by spherical cells, each with a large nucleus and well-developed rough endoplasmic reticulum. Secretion vesicles are abundant, but lipid droplets were not observed, indicating that these glands may not have a role in pheromone synthesis. Acid phosphatase was detected in lysosomes, and also flee in the cytosol, but did not seem to be related with cell death. Thus, our results suggest that the hypopharyngeal glands ofP. versicolor may not have a specialized social role, but could produce digestive enzymes.

关键词： cellular cycle cytochemistry hypopharyngeal glands morphology Polistes,wasps

Management of inflammatory bowel disease in the pregnant patient

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World Journal of Gastroenterology 2008年第9期14卷 1326-1332页

作者： flavio M Habal Nikila C Ravindran Department of Medicine Division of Gastro-enterology University Health NetworkToronto General Hospital SiteTorontoOntario M5G 2C4Canada Faculty of Medicine University of TorontoTorontoOntarioCanada

Inflammatory bowel disease (IBD) is a chronic disorder affecting young adults in their reproductive years. Many young women with IBD express concern about the effect their disease will have on fertility, pregnancy course and fetal development. This article presents an approach to management of IBD in the pregnant patient, including counseling and investigation, and summarizes existing data on the safety of medications used to treat IBD in pregnancy and breastfeeding.

关键词： Inflammatory bowel disease Ulcerative colitis Crohn's disease Fertility Pregnancy Breast feeding

Windmills： Ancestors of the wind power generation

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Frontiers of Mechanical Engineering 2017年第3期12卷 389-396页

作者： Cesare ROSSI flavio RUSSO Sergio SAVINO Department of Industrial Engineering University of Naples "Federico Ⅱ" via Claudio Naples 80125 Italy Consultant of Ufficio Storico Stato Maggiore Esercito Torre Del Greco 80059 Italy

A brief description of the windmills from the second millennium BC to the Renaissance is presented. This survey is a part of several studies conducted by the authors on technology in the ancient world. The windmills are the first motor, other than human muscles, and are the ancestors of the modem wind turbines. Some authors＇ virtual reconstructions of old windmills are also presented. The paper shows that the operating principle of many modem machines had already been conceived in the ancient times by using a technology that was more advanced than expected, but with two main differences, as follows： Similar tasks were accomplished by using much less energy; and the environmental impact was nil or very low. Modem designers should sometimes consider simplicity rather than the use of a large amount of energy.

关键词： windmills ancient machines history of windmill

Horizontal accuracy assessment of very high resolution Google Earth images in the city of Rome,Italy

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International Journal of Digital Earth 2016年第4期9卷 342-362页

作者： Giuseppe Pulighe Valerio Baiocchi flavio Lupia Istituto Nazionale di Economia Agraria via Nomentana 41Roma Dipartimento di Ingegneria Civile Edile e Ambientale(DICEA)UniversitàLa SapienzaRoma

Google Earth(GE)has recently become the focus of increasing interest and popularity among available online virtual globes used in scientific research projects,due to the free and easily accessed satellite imagery provided with global ***,the uses of this service raises several research questions on the quality and uncertainty of spatial data(*** accuracy,precision,consistency),with implications for potential uses like data collection and *** paper aims to analyze the horizontal accuracy of very high resolution(VHR)GE images in the city of Rome(Italy)for the years 2007,2011,and *** evaluation was conducted by using both Global Positioning System ground truth data and cadastral photogrammetric vertex as independent check *** validation process includes the comparison of histograms,graph plots,tests of normality,azimuthal direction errors,and the calculation of standard statistical *** results show that GE VHR imageries of Rome have an overall positional accuracy close to 1 m,sufficient for deriving ground truth samples,measurements,and large-scale planimetric maps.

关键词： Google Earth VHR images GPS accuracy assessment Rome

An overview on nucleation theories and models

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Journal of Rare Earths 2019年第10期37卷 1015-1022页

作者： Marcos flavio de Campos Jose Adilson de Castro Department of Mechanical Engineering Federal Fluminense University

Several different models for coercivity are discussed. There are two main situations: i) nanocrystalline magnets, with grain size bellow the single domain particle size, and ii) magnets with grain size above single domain particle size. The described theories and models are general, and can be applied in either NdFeB magnets, SmFeCoCuZr or strontium ferrite magnets. The spring effect observed in isotropic nanocrystalline magnets can be explained with the Stoner-Wohlfarth model. Modifications of the StonerWohlfarth model are necessary to take into account the effect of interaction between grains. When the grain size is above the single domain size, energy considerations show that nucleation should occur at the surface of grains. Nucleation is interpreted as a two-step process, where domain wall displacement occurs for grain size above single domain size, after a nucleus is first formed. The effect of grain size on the coercive field is discussed.

关键词： Coercivity Nucleation Grain size Spring effect Nd-Fe-B Permanent magnet