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Interpreting siliciclastic sedimentation in the upper Paleozoic Mulargia-Escalaplano Basin(Sardinia, Italy):influence of tectonics on provenance

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Journal of Palaeogeography 2024年第1期13卷 18-34页

作者： luca G.Costamagna Sara Criniti Dipartimento di Scienze Chimiche e Geologiche Citadella UniversitariaBlocco A09042 Monserrato CAItaly Dipartimento di Ingegneria dell'Ambiente Universita della Calabria87036 Arcavacata di Rende CSItaly

Late to post-Variscan molassic basins of Late Pennsylvanian-Permian age are exposed in Sardinia(Italy). Here, the compositional and stratigraphic evolution of the Mulargia-Escalaplano sedimentary basin(central Sardinia) has been investigated to highlight how the tectono-magmatic processes have influenced the sedimentation. Ruditic and arenitic samples were collected along well-characterized stratigraphic sections to provide a new insight into the impact of the tectono-magmatic processes on siliciclastic sedimentation. As a result, the conglomerates are mainly clast-supported, petromictic, and thus immature, with no defined maturity trend upwards. Nevertheless, pebble composition changes in times from Variscan basement pebble-rich to volcanic rock-rich, as a consequence of the basin widening and the dismantling and reworking of the coeval volcanic activity. The sandstone composition clearly changes from quartzolithic to feldspatholithic upwards, as a response to the same change of feeding and reworking of the volcanic rocks. Occasionally, interbedded quartzolithic arenites suggest exceptional floods carrying debris from the far borders of the basin. Also, the immature sandstone composition has been interpreted as being controlled by a continuous supply of fresh debris and to a rapid burial rate. In addition, the disappearance of metaradiolarite(lydite AA) Paleozoic grains in the sandstone mineral suite could represent a distinctive marker of a progressive unroofing of the Variscan chain and a clastic supply from deeper tectonic units.

关键词： Petrography Stratigraphy Provenance Molassic basins Sardinia

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Multi-temporal modeling of road-induced overland flow alterations in a terraced landscape characterized by shallow landslides

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International Soil and Water Conservation Research 2022年第2期10卷 240-253页

作者： luca Mauri Eugenio Straffelini Paolo Tarolli Department of Land EnvironmentAgriculture and ForestryUniversity of PadovaAgripolisViale Dell’Università 1635020Legnaro(PD)Italy

The presence of roads in high steep agricultural systems is often linked with landslides *** research aims to model multi-temporal overland flow dynamics in a shallow landslides-prone terraced landscape(northern Italy).The combined use of Remotely Piloted Aircraft Systems(RPAS)and photo-grammetric techniques(e.g.,Structure from Motion-SfM)allowed to elaborate multi-temporal high-resolution Digital Elevation Models(DEMs).Hydrological analyses of water flow's depth alterations due to the road presence were carried out adopting the SIMulated Water Erosion model(SIMWE),focusing on different scenarios considering the presence of the road and assuming its absence through a specific DEM smoothing *** possibility to perform multi-temporal hydrological simulations at a hillslope scale so as to analyse the role played by the road in overland flows alteration is still a challenge to be *** proved the role played by the road in water flows change above the two observed shallow landslides,with respective maximum water depth values equal to 0.18 m and 0.14 *** the contrary,no-road simulations not revealed significant water flows deviations towards landslides,with water depth values around 0 m,underlining that the absence of the road would avoid relevant changes in water flow paths toward the collapsed *** work could be a solid starting point for analyse road impact on runoff dynamics and hillslopes stability also at a wider scale,as well as for planning efficient mitigation intervention so as to reduce the occurrence of similar future scenarios.

关键词： Terraced landscape Road Landslide Remote sensing DEM

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Intra-cycle depolarization of ultraintense laser pulses focused by off-axis parabolic mirrors

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High Power Laser Science and Engineering 2018年第2期6卷 141-148页

作者： luca Labate Gianluca Vantaggiato Leonida A.Gizzi Istituto Nazionale di Ottica Consiglio Nazionale delle Ricerche Istituto Nazionale di Fisica Nucleare Sezione di Pisa

A study of the structure of the electric and magnetic fields of ultraintense laser pulses focused by an off-axis parabolic mirror is reported. At first, a theoretical model is laid out, whose final equations integration allows the space and time structure of the fields to be retrieved. The model is then employed to investigate the field patterns at different times within the optical cycle, for off-axis parabola parameters normally employed in the context of ultraintense laser–plasma interaction experiments. The results show that nontrivial, complex electromagnetic field patterns are observed at the time at which the electric and magnetic fields are supposed to vanish. The importance of this effect is then studied for different laser polarizations, f numbers and off-axis angles.

关键词： laser-driven particle acceleration laser focusing off-axis parabolic mirrors ultrashort laser pulses

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Well-Posedness of Stochastic Continuity Equations on Riemannian Manifolds

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Chinese Annals of Mathematics,Series B 2024年第1期45卷 81-122页

作者： luca GALIMBERTI Kenneth H.KARLSEN Department of Mathematical Sciences NTNU Norwegian University of Science and TechnologyN-7491 TrondheimNorway Department of mathematics University of OsloP.O.Box 1053BlindernN-0316 OsloNorway

The authors analyze continuity equations with Stratonovich stochasticity,■ρ+divh[ρo(u(t,x)+∑_(i=1)^(N)a_(i)(x)w_(i)(t))]=0defined on a smooth closed Riemannian manifold M with metric *** velocity field u is perturbed by Gaussian noise terms Wi(t),:WN(t)driven by smooth spatially dependent vector fields a1(x),...,aN(x)on *** velocity u belongs to L_(t)^(1)W_(x)^(1,2)with divh u bounded in Lf,for p>d+2,where d is the dimension of M(they do not assume div_(h) u∈L_(t,x)^(∞)).For carefully chosen noise vector fields ai(and the number N of them),they show that the initial-value problem is well-posed in the class of weak L^(2) solutions,although the problem can be ill-posed in the deterministic case because of concentration *** proof of this“regularization by noise”result is based on a L^(2) estimate,which is obtained by a duality method,and a weak compactness argument.

关键词： Stochastic continuity equation Riemannian manifold Hyperbolic equa-tion Non-smooth velocity field Weak solution Existence Uniqueness

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Zeckendorf representations with at most two terms to x-coordinates of Pell equations

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Science China Mathematics 2020年第4期63卷 627-642页

作者： Carlos A.Gómez Florian luca Departamento de Matematicas Universidad del ValleCali 25360Colombia School of Mathematics University of the WitwatersrandWits 2050South Africa Max Planck Institute for Mathematics Bonn 53111Germany Department of Mathematics Faculty of SciencesUniversity of OstravaOstrava 70103Czech Republic

In this paper,we find all positive squarefree integers d satisfying that the Pell equation X^2-d Y^2=±1 has at least two positive integer solutions(X,Y)and(X′,Y′)such that both X and X′have Zeckendorf representati... 详细信息

关键词： Pell equation Fibonacci numbers lower bounds for linear forms in logarithms reduction method

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Heavy metals adsorption by banana peels micro-powder: Equilibrium modeling by non-linear models

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Chinese Journal of Chemical Engineering 2018年第3期26卷 455-464页

作者： Giorgio Vilardi luca Di Palma Nicola Verdone Sapienza University of Rome Department of Chemical Engineering Materials Environment

In this study the copper and lead adsorption efficiency onto banana peels powder was investigated. The agroindustrial waste recovery represents one of the Circular Economy pillars. In the view of the synthesis of an environmentally friendly adsorbent material, the powder was used without any preliminary chemical or thermal activation, but only after simple washing, drying and grinding. The bio-adsorbent was characterized by the FTIR technique and tested in batch mode on synthetic aqueous solutions containing Pb and Cu in the range 10–90 mg·L^(-1). A selection of two(Langmuir, Freundlich) and three(Sips, Redlich–Peterson, Koble–Corrigan) parameter isotherm models was chosen to fit adsorption equilibrium data by non-linear regression procedure. The best fit isotherm model was selected relying on the error function with the lowest average percentage error(APE) value, among those characterized by the highest R^2 values. As expected, the three-parameter models are found to better represent both metals bio-adsorption, with APE and R^2 values always lower and higher, respectively, than the corresponding values obtained for the two-parameter models.

关键词： Banana peel Heavy metals Bio-adsorbent Non-linear model FIIR

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Current situation and future perspectives of European natural gas sector

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Frontiers in Energy 2015年第1期9卷 1-6页

作者： Vincenzo BIANCO Federico SCARPA luca A. TAGLIAFICO Division of Thermal Energy and Environmental Conditioning DIME/TEC University of Genoa Via All'OperaPia 15/A 16145 Genova Italy

Gas market in Europe is experiencing a radical change for different reasons, partially determined and accelerated by economic downturn of the last period. In the past few years, many European countries adopted energy policies largely based on the utilization of natural gas. In fact, a sharp increase of the demand was observed and, at the same time, a lot of infrastructures were developed to assure the necessary supply. In the last few years, due to the economic downturn, natural gas demand decreased, causing a consistent oversupply on the market, which altered the consolidated dynamics of the sector. Under- standing the changes currently under development in the European gas market is of paramount importance in order to design future strategies for the sector; in particular, it is necessary to understand if the present situation will cause a reshaping of the sector.

关键词： natural gas natural gas market oil-linkedcontracts supply infrastructures gas hubs

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Topological optimization of ballistic protective structures through genetic algorithms in a vulnerability-driven environment

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Defence Technology（防务技术） 2024年第10期40卷 125-137页

作者： Salvatore Annunziata luca Lomazzi Marco Giglio Andrea Manes Politecnico di Milano Department of Mechanical EngineeringVia Giuseppe La Masa120156Italy

Reducing the vulnerability of a platform,i.e.,the risk of being affected by hostile objects,is of paramount importance in the design process of vehicles,especially aircraft.A simple and effective way to decrease vulnerability is to introduce protective structures to intercept and possibly stop ***,this type of solution can lead to a significant increase in weight,affecting the performance of the *** this reason,it is crucial to study possible solutions that allow reducing the vulnerability of the aircraft while containing the increase in structural *** possible strategy is to optimize the topology of protective solutions to find the optimal balance between vulnerability and the weight of the added *** the many optimization techniques available in the literature for this purpose,multiobjective genetic algorithms stand out as promising *** this context,this work proposes the use of a in-house software for vulnerability calculation to guide the process of topology optimization through multi-objective genetic algorithms,aiming to simultaneously minimize the weight of protective structures and *** addition to the use of the in-house software,which itself represents a novelty in the field of topology optimization of structures,the method incorporates a custom mutation function within the genetic algorithm,specifically developed using a graph-based approach to ensure the continuity of the generated *** tool developed for this work is capable of generating protections with optimized layouts considering two different types of impacting objects,namely bullets and fragments from detonating *** software outputs a set of non-dominated solutions describing different topologies that the user can choose from.

关键词： Topological optimization Protective structure Genetic algorithm Survivability Vulnerability

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Default polyfunctional T helper 1 response to ample signal 1 alone

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Cellular & Molecular Immunology 2021年第7期18卷 1809-1822页

作者： luca Danelli Georgina Cornish Julia Merkenschlager George Kassiotis Present address:Laboratory of Molecular Immunology The Rockefeller UniversityNew YorkNY10065USA Department of Medicine Faculty of MedicineImperial College LondonLondonW21PGUK Retroviral Immunology The Francis Crick Institute1 Midland RoadLondonNW11ATUK

CD4^(+)T cells integrate well-defined signals from the T-cell receptor(TCR)(signal 1)and a host of costimulatory molecules(signal 2)to initiate clonal expansion and differentiation into diverse functional T helper(Th)***,our ability to guide the expansion of context-appropriate Th subsets by deploying these signals in vaccination remains *** cell-based vaccines,we selectively amplified signal 1 by exclusive presentation of an optimized peptide:MHC II(pMHC II)complex in the absence of classic *** to expectations,amplified signal 1 alone was strongly immunogenic and selectively expanded highaffinity TCR clonotypes,despite delivering intense TCR *** contrast to natural infection or standard vaccines,amplified signal 1,presented by a variety of professional and nonprofessional antigen-presenting cells(APCs),induced exclusively polyfunctional Th1 effector and memory cells,which protected against retroviral infection and tumor challenge,and expanded tumor-reactive CD4^(+)T cells otherwise rendered unresponsive in tumor-bearing ***,our findings uncover a default Th1 response to ample signal 1 and offer a means to selectively prime such protective responses by vaccination.

关键词： CD4 T cell priming T helper differentiation peptide-MHC II complex

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Blockchain-based Internet of Musical Things

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Blockchain(Research and Applications) 2022年第3期3卷 60-69页

作者： luca Turchet Chan Nam Ngo Department of Information Engineering and Computer Science University of TrentoTrento38122Italy Faculty of Mathematics Informaticsand Mechanics of the University of WarsawWarsaw00-927Poland

Blockchain technology is impacting several industries,including the creative industries and those operating in the Internet of Things(IoT).Lately,researchers'attention has been devoted to the application of blockchain in the recorded music ***,thus far,no research has investigated the use of such technology in the Internet of Musical Things(IoMusT).The IoMusT is a new area emerging in industry and academy as an extension of the IoT to the musical *** IoMusT itself,as the IoT,is a distributed network of musical things,which are objects augmented with information and communication technologies serving a musical *** IoMusT vision requires,above all,IoT features such as decentralization,seamless authentication,transparency,data integrity and privacy,and self-maintenance,as well as the musical domain features such as efficient handling of copyrights and speed of royalties *** features can be brought by *** this paper,we investigate the integration of blockchain technology with the IoMusT,and we name such synthesis“Blockchain-based IoMusT”.We present a vision for this new paradigm in terms of the novel opportunities that are enabled,and we propose a set of application scenarios enabled by technological ***,we outline the open research directions in this promising area.

关键词： Internet of Musical Things Blockchain Music industry Privacy Security Internet of Things

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