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A Recursive Basis for Primitive Forms in Symplectic Spaces and Applications to Heisenberg Groups

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Acta Mathematica Sinica,English Series 2016年第3期32卷 265-285页

作者： Annalisa BALDI marilena BARNABEI Bruno FRANCHI Dipartimento di Matematica Piazza di Porta S.Donato 540126 BolognaItaly

This paper is divided in two parts： in Section 2, we define recursively a privileged basis of the primitive forms in a symplectic space（V^（2n）, ω）. Successively, in Section 3, we apply our construction in the setting of Heisenberg groups H^n, n ≥ 1, to write in coordinates the exterior differential of the so-called Rumin＇s complex of differential forms in H^n.

关键词： Symplectic manifolds differential forms Heisenberg groups combinatorial functions

Fungal spores and pollen in particulate matter collected during agricultural activities in the Po Valley(Italy)

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Journal of Environmental Sciences 2016年第8期28卷 229-240页

作者： Chiara Telloli Milvia Chicca marilena Leis Carmela Vaccaro Italian National Agency for New Technologies Energy and Sustainable Economic Development (ENEA) Technical Unit for Environmental Assessment Models Methods and Technologies (UTVALAMB) Air Quality Laboratory (AIR) Department of Life Science and Biotechnologies Ferrara University Department of Physics and Earth Sciences Ferrara University

Airborne particulate matter（PM） containing fungal spores and pollen grains was sampled within a monitoring campaign of wheat threshing, plowing and sowing agricultural operations. Fungal spores and pollen grains were detected and identified on morphological basis. No studies were previously available about fungal spore and pollen content in agricultural PM in the Po Valley. Sampling was conducted in a Po Valley farmland in Mezzano（Ferrara, Italy）. The organic particles collected were examined by scanning electron microscopy with energy dispersive X-ray spectrometer. Fungal spores and pollen grains were identified when possible at the level of species. The most frequent components of the organic particles sampled were spores of Aspergillus sp., which could represent a risk of developing allergies and aspergillosis for crop farmers.

关键词： Wheat Aspergillosis Emilia-Romagna Morphology SEM–EDS

Simplified hydrodynamic models for the analysis of marine propellers in a wake-field

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Journal of Hydrodynamics 2013年第6期25卷 954-965页

作者： durante D. DUBBIOSO G. TESTA C. CNR-INSEAN The Italian Ship Model Basin

This paper presents a comparison among different hydrodynamic models for the analysis of the unsteady loads delivered by a marine propeller working in an axial, non-uniform inflow. Specifically, for a propeller subjected to a wake-field dominated by local high-frequency changes in space, the unsteady hydroloads predicted by the Nakatake formulation are compared with those given by the Theodorsen and Sears theories, respectively. Drawbacks and potentialities of these approaches are highlighted to assess a computationally efficient hydrodynamic solver for the analysis of operating conditions where propeller blades are significantly perturbed by a multi-harmonic onset-flow. Guidelines coming from this investigation may drive the choice of a fast and reliable unsteady propeller modeling that represents a good trade-off between accuracy of simulation and cost of computation within implementation in Computational Fluid Dynamics （CFD） solvers. The hydrodynamic formulations herein proposed are validated through numerical comparisons with the （accurate but computationally expensive） propeller loads predicted by a fully 3-D panel-method Boundary Element Method （BEM） solver, suited for the analysis of propellers operating in a complex hydrodynamic environment.

关键词： actuator disk airfoil theories Boundary Element Method (BEM) hydrodynamics

On product affine hyperspheres in R^n+1

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Science China Mathematics 2020年第10期63卷 2055-2078页

作者： Xiuxiu Cheng Zejun Hu marilena Moruz Luc Vrancken School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China Henan Key Laboratory of Financial Engineering Zhengzhou 450001China Department of Mathematics KU LeuvenLeuven 3001Belgium Institut des Sciences et Techniques de Valenciennes(ISTV) Universit´e Polytechnique Hauts de FranceValenciennes 59313France

In this paper,we study locally strongly convex affine hyperspheres in the unimodular affine space Rn+1 which,as Riemannian manifolds,are locally isometric to the Riemannian product of two Riemannian manifolds both possessing constant sectional *** the main result,a complete classification of such affine hyperspheres is ***,as direct consequences,3-and 4-dimensional affine hyperspheres with parallel Ricci tensor are also classified.

关键词： affine hypersurface affine metric affine hypersphere Levi-Civita connection constant sectional curvature parallel Ricci tensor

Complexity analysis of blast-induced vibrations in underground mining: A case study

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International Journal of Mining Science and Technology 2012年第1期22卷 125-131页

作者： Cardu marilena Dompieri Mauricio Seccatore Jacopo Department of Land Environment and Geotechnology (DITAG) Corso Duca degli Abruzzi IGAG C.N.R. Corso Duca degli Abruzzi Ontonix Brasil Rua Madre Rita Amada de Jesus Sao Paulo Brazil Mining and Petroleum Engineering Department University of Sao Paulo Sao Paulo Brazil

Blasting in geological bodies is an industrial process acting in an environment characterized by high uncertainties (natural joints, faults, voids, abrupt structural changes), which are transposed into the process parameters (e.g. energetic transfer to rock mass, hole deviations, misfires, vibrations, fly-rock, etc.). The approach to this problem searching for the "optimum" result can be ineffective. The geological environment is marked out by too many uncertainties, to have an "optimum" suitable to different applications. Researching for "Robustness" in a blast design gives rise to much more efficiency. Robustness is the capability of the system to behave constantly under varying conditions, without leading to unexpected results. Since the geology varies from site to site, setting a robust method can grant better results in varying environments, lowering the costs and increasing benefits and safety. Complexity Analysis (C.A.) is an innovative approach to systems. C.A. allows analyzing the Complexity of the Blast System and the criticality of each variable (drilling, charging and initiation parameters). The lower is the complexity, the more robust is the system, and the lower is the possibility of unexpected results. The paper presents the results obtained thanks to the C.A. approach in an underground gypsum quarry (Italy), exploited by conventional rooms and pillars method by drilling and blasting. The application of C.A. led to a reliable solution to reduce the charge per delay, hence reducing the impact of ground vibration on the surrounding structures. The analysis of the correlation degree between the variables allowed recognizing empirical laws as well.

关键词：复杂性分析地下开采爆破地质体高炉系统震动爆炸环境特点地面振动

Inflammatory bowel diseases patients suffer from significant low levels and barriers to physical activity:The“BE-FIT-IBD”study

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World Journal of Gastroenterology 2023年第41期29卷 5668-5682页

作者： Antonietta Gerarda Gravina Raffaele Pellegrino Tommaso durante Giovanna Palladino Rossella D’Onofrio Simone Mammone Giusi Arboretto Salvatore Auletta Giuseppe Imperio Andrea Ventura Mario Romeo Alessandro Federico Department of Precision Medicine Hepatogastroenterology UnitUniversity of Campania Luigi VanvitelliNaples 80138Italy Mental Health Department S.Pio HospitalBenevento 82100Italy

BACKGROUND The place regular physical activity(PA)should occupy in managing patients with inflammatory bowel diseases(IBD)is *** To assess PA levels and barriers in a southern Italian IBD *** IBD patients with non-severe disease activity[assessed with partial Mayo score for ulcerative colitis(UC)and Harvey-Bradshaw index for Crohn’s disease]were approached to receive an anonymous online questionnaire to assess PA levels using the International Physical Activity Questionnaire(IPAQ)and to assess disease activity as patient-reported outcomes 2(PRO-2)and finally to assess habits,beliefs and barriers in conducting regular ***,anthropometric and demographic data of patients were also *** was expressed as continuous units of resting metabolic rate(Met)in min/*** PA groups were identified:Inactive(2500 Met min/wk)*** Included patients(219)showed overall PA levels of 834.5 Met min/wk,with a large proportion(94,42.9%)classified as inactive while only a minority(9,4.1%)as health-enhancing *** without dyslipidaemia(P0.05).Active patients expressed the need to discuss PA with their *** barriers(e.g.,diagnosis of IBD and fear of flare-ups after PA)are significantly more reported by inactive *** A significant rate of physical inactivity was recorded in this *** showed good *** should be an element of discussion in IBD visits assessed quickly with non-invasive questionnaires.

关键词： Crohn’s disease Inflammatory bowel disease International Physical Activity Questionnaire Physical activity Ulcerative colitis

Modelling the dynamics of population viral load measures under HIV treatment as prevention

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Infectious Disease Modelling 2018年第1期3卷 160-170页

作者： Ganna Rozhnova marilena Anastasaki Mirjam Kretzschmar Julius Center for Health Sciences and Primary Care University Medical Centre UtrechtUtrechtthe Netherlands Centre for Infectious Disease Control National Institute of Public Health and the EnvironmentBilthoventhe Netherlands

In 2011 the Centers for Disease Control and Prevention(CDC)published guidelines for the use of population viral load(PVL),community viral load(CVL)and monitored viral load(MVL),defined as the average viral load(VL)of all HIV infected individuals in a population,of all diagnosed individuals,and of all individuals on antiretroviral treatment(ART),*** then,CVL has been used to assess the effectiveness of ART on HIV transmission and as a proxy for HIV *** first objective of this study was to investigate how aggregate VL measures change with the HIV epidemic phase and the drivers behind these changes using a mathematical transmission ***,we aimed to give some insight into how well CVL correlates with HIV incidence during the course of the epidemic and roll out of *** developed a compartmental model for disease progression and HIV transmission with disease stages that differ in viral loads for epidemiological scenarios relevant to a concentrated epidemic in a population of men who have sex with men(MSM)in Western Europe(WE)and to a generalized epidemic in a heterosexual population in Sub-Saharan Africa(SSA).The model predicts that PVL and CVL change with the epidemic phase,while MVL stays *** dynamics are linked to the dynamics of infected subgroups(undiagnosed,diagnosed untreated and treated)in different disease stages(primary,chronic and AIDS).In particular,CVL decreases through all epidemic stages:before ART,since chronic population builds up faster than AIDS population and after ART,due to the build-up of treated population with low *** trends in CVL and incidence can be both opposing and coinciding depending on the epidemic *** ART is scaled up to sufficiently high levels,incidence increases while CVL *** this point,CVL is a useful indicator of changes in HIV *** model predicts that during the ART scale-up HIV transmission is driven by undiagnosed and diagnosed untreated individuals,a

关键词： Population viral load measures Mathematical model HIV incidence Community viral load Monitored viral load Population viral load

Hepatitis delta virus: From infection to new therapeutic strategies

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World Journal of Gastroenterology 2021年第24期27卷 3530-3542页

作者： Grazia A Niro Arianna Ferro Francesca Cicerchia Isabella Brascugli marilena Durazzo Department of Gastroenterology IRCCS Casa Sollievo della Sofferenza Hospital FoundationSan Giovanni Rotondo 71013Italy Department of Medical Sciences University of TurinTurin 10126Italy

The hepatitis delta virus(HDV)is a small RNA virus that encodes a single protein and which requires the hepatitis B virus(HBV)-encoded hepatitis B surface antigen(HBsAg)for its assembly and ***/HDV co-infections exist worldwide and show a higher prevalence among selected groups of HBV-infected populations,specifically intravenous drug users,practitioners of high-risk sexual behaviours,and patients with cirrhosis and hepatocellular *** chronic form of HDV-related hepatitis is usually severe and rapidly *** of the viral infection itself,including the status of co-infection or super-infection,virus genotypes(both for HBV and HDV),and persistence of the virus’replication,influence the outcome of the accompanying and manifested liver ***,disease severity is burdened by the lack of an effective cure for either virus *** decades,the main treatment option has been interferon,administered as mono-therapy or in combination with nucleos(t)ide *** its efficacy has been reported for different doses,durations and courses,only a minority of patients achieve a sustained response,which is the foundation of eventual improvement in related liver *** need for an efficient therapeutic alternative *** efforts towards this end have led to new treatment options that target specific steps in the HDV life cycle;the most promising among these are myrcludex B,which inhibits virus entry into hepatocytes,lonafarnib,which inhibits farnesylation of the viral-encoded LHDAg large hepatitis D antigen,and REP-2139,which interferes with HBsAg release and assembly.

关键词： Hepatitis delta virus Hepatitis B virus Myrcludex Lonafarnib REP 2139

Porous Co_(x)Ni_(1-x)TiO_(3) nanorods for solar photocatalytic degradation of ethyl paraben

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Journal of Materiomics 2020年第4期6卷 788-799页

作者： marilena Moschogiannaki Zacharias Frontistis George Kiriakidis Dionissios Mantzavinos Vassilios Binas Institute of Electronic Structure and Laser Foundation for Research and Technology-Hellas(FORTH-IESL)Greece Department of Material Science and Technology University of CreteHerakleioGreece Department of Physics University of CreteHerakleioGreece Department of Chemical Engineering University of PatrasCaratheodory 1University CampusGR-26504PatrasGreece Department of Chemical Engineering University of Western MacedoniaGR-50100KozaniGreece

Porous Porous Co_(x)Ni_(1-x)TiO_(3) nanorods were successfully synthesized through a solution-based method following an ethylene glycol route at room *** effect of calcination temperature from 300℃to 900℃ for NiTiO_(3) and CoTiO_(3) nanorods was studied using X-ray diffractometry and scanning electron microscopy in order to investigate their structural and morphological *** optimum calcination temperature to prepare pure ilmenite type structure rods with high crystallinity and hexagonal shape was 600Co_(x)Ni_(1-x)TiO_(3) exhibited the highest photocatalytic activity for the degradation of ethyl paraben,an endocrine disrupting compound,under simulated solar or visible light *** complete(i.e.92%)paraben degradation occurred after 5 h of solar irradiation and this decreased to 48%when only the visible part of the radiation was *** solar photocatalytic activity of CoTiO_(3) and NiTiO_(3) was found to be 42%and 67%,respectively.

关键词： Solar photocatalysis Catalyst properties Cobalt-nickel titanates Endocrine disruptors