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Tree colonization by the Asian longhorn beetle, Anoplophora glabripennis （Coleoptera： Cerambycidae）： effect of habitat and tree suitability

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Insect Science 2016年第2期23卷 288-296页

作者： Massimo Faccoli Riccardo Favaro Giuseppe Concheri andrea Squartini andrea Battisti Department of Agronomy Food Natural resources Animals and Environment (DAFNAE) University of Padova Legnaro (PD) Italy

Tree colonization and feeding activity of the invasive wood-borer Asian longhorn beetle （Anoplophora glabripennis）, an Asian pest introduced into North America and Europe, was studied in a newly invaded area in Italy. The hypothesis be- ing tested was that the reproductive success of the insect depend on habitat type and tree suitability. Adult beetles were caged on branches of host and nonhost species, in both urban and forest habitats. Two months later, number and size of feeding patches on plant tissues, eggs laid, and surviving larvae were assessed. Bark concentration of C and N was also measured from the same trees. Results indicated that the mean area of plant tissues consumed by adult feeding was significantly larger on trees growing in forest than in urban habitat, although within the same habitat there were no differences between susceptible and nonsusceptible trees. ALB tree colonization, in terms of number of eggs laid and young larvae survival, was not affected by habitat while it was higher on susceptible trees. Although trees growing in forests had a lower nitrogen concentration, they allowed colo- nization rates similar to those of trees growing in the urban habitat. Hence, the amount of carbon and nitrogen did not fully explain tree suitability or habitat selection. We suggest compensatory feeding as a potential mechanism that might explain this peculiar situation, as supported by a more intensive feeding activity recorded on trees in the forest. Suitability of different trees may be due to other factors, such as secondary chemical compounds.

关键词： Asian longhorn beetle performance breeding feeding forest nonhost urban

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Semantic typing of linked geoprocessing workflows

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International Journal of Digital Earth 2018年第1期11卷 113-138页

作者： Simon Scheider andrea Ballatore Human Geography and Spatial Planning Universiteit UtrechtUtrechtNetherlands Department of Geography BirkbeckUniversity of LondonLondonUK

In Geographic Information Systems(GIS),geoprocessing workflows allow analysts to organize their methods on spatial data in complex *** propose a method for expressing workflows as linked data,and for semi-automatically enriching them with semantics on the level of their operations and *** workflows can be easily published on the Web and queried for types of inputs,results,or ***,GIS analysts can reuse their workflows in a modular way,selecting,adapting,and recommending resources based on compatible semantic *** typing approach starts from minimal annotations of workflow operations with classes of GIS tools,and then propagates data types and implicit semantic structures through the workflow using an OWL typing scheme and SPARQL rules by backtracking over GIS *** method is implemented in Python and is evaluated on two real-world geoprocessing workflows,generated with Esri's *** illustrate the potential applications of our typing method,we formulate and execute competency questions over these workflows.

关键词： Geoprocessing spatial analysis workflows semantic typing linked data

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Limiting majoron self-interactions from gravitational wave experiments

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Chinese Physics C 2018年第2期42卷 64-70页

作者： andrea Addazi Antonino Marcianò Department of Physics & Center for Field Theory and Particle Physics Fudan University

We show how majoron models may be tested/limited in gravitational wave experiments. In particular,the majoron self-interaction potential may induce a first order phase transition, producing gravitational waves from bubble collisions. We dub such a new scenario the violent majoron model, because it would be associated with a violent phase transition in the early Universe. Sphaleron constraints can be avoided if the global U（1）_（B-L） is broken at scales lower than the electroweak scale, provided that the B-L spontaneously breaking scale is lower than10 TeV in order to satisfy the cosmological mass density bound. The possibility of a sub-electroweak phase transition is practically unconstrained by cosmological bounds and it may be detected within the sensitivity of the next generation of gravitational wave experiments： eLISA, DECIGO and BBO. We also comment on its possible detection in the next generation of electron-positron colliders, where majoron production can be observed from the Higgs portals in missing transverse energy channels.

关键词： lepton/baryon number violation majorons gravitational waves colliders

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Fruit ripeness classification:A survey

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Artificial Intelligence in Agriculture 2023年第1期7卷 44-57页

作者： Matteo Rizzo Matteo Marcuzzo Alessandro Zangari andrea Gasparetto andrea Albarelli Ca’Foscari Department of Environmental Sciences Informatics and StatisticsVia Torino 155Mestre(VE)30172Italy Ca’Foscari Department of Management Cannaregio 873Fondamenta San GiobbeVenice 30121Italy

Fruit is a key crop in worldwide agriculture feeding millions of *** standard supply chain of fruit products involves quality checks to guarantee freshness,taste,and,most of all,*** important factor that determines fruit quality is its stage of *** is usually manually classified by field experts,making it a labor-intensive and error-prone ***,there is an arising need for automation in fruit ripeness *** automatic methods have been proposed that employ a variety of feature descriptors for the food item to be *** learning and deep learning techniques dominate the top-performing ***,deep learning can operate on raw data and thus relieve the users from having to compute complex engineered features,which are often *** this survey,we review the latest methods proposed in the literature to automatize fruit ripeness classification,highlighting the most common feature descriptors they operate on.

关键词： Fruit ripeness classification Machine learning Deep learning

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Movement Primitives as a Robotic Tool to Interpret Trajectories Through Learning-by-doing

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International Journal of Automation and computing 2013年第5期10卷 375-386页

作者： andrea Soltoggio Andre Lemme Research Institute for Cognition and Robotics Bielefeld University

Articulated movements are fundamental in many human and robotic *** humans can learn and generalise arbitrarily long sequences of movements,and particularly can optimise them to ft the constraints and features of their body,robots are often programmed to execute point-to-point precise but fxed *** study proposes a new approach to interpreting and reproducing articulated and complex trajectories as a set of known robot-based *** of achieving accurate reproductions,the proposed approach aims at interpreting data in an agent-centred fashion,according to an agent s primitive *** method improves the accuracy of a reproduction with an incremental process that seeks frst a rough approximation by capturing the most essential features of a demonstrated *** the discrepancy between the demonstrated and reproduced trajectories,the process then proceeds with incremental decompositions and new searches in sub-optimal parts of the *** aim is to achieve an agent-centred interpretation and progressive learning that fts in the frst place the robots capability,as opposed to a data-centred decomposition *** on both geometric and human generated trajectories reveal that the use of own primitives results in remarkable robustness and generalisation properties of the *** particular,because trajectories are understood and abstracted by means of agent-optimised primitives,the method has two main features： 1） Reproduced trajectories are general and represent an abstraction of the data.2） The algorithm is capable of reconstructing highly noisy or corrupted data without pre-processing thanks to an implicit and emergent noise suppression and feature *** study suggests a novel bio-inspired approach to interpreting,learning and reproducing articulated movements and *** applications include drawing,writing,movement generation,object manipulation,and other tasks where the performance

关键词： Movement primitives learning pattern matching trajectory decomposition perception

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The role of structural inheritance in continental break-up and exhumation of Alpine Tethyan mantle(Canavese Zone,Western Alps)

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Geoscience Frontiers 2020年第1期11卷 167-188页

作者： andrea Festa Gianni Balestro Alessandro Borghi Sara De Caroli andrea Succo Dipartimento di Scienze della Terra Universitàdi TorinoTorinoItaly Dipartimento di Scienze Chimiche della Vita e della SostenibilitàAmbientaleUniversitàdi ParmaParmaItaly

The Canavese Zone(CZ)in the Western Alps represents the remnant of the distal passive margin of the Adria microplate,which was stretched and thinned during the Jurassic opening of the Alpine *** detailed geological mapping,stratigraphic and structural analyses,we document that the continental break-up of Pangea and tectonic dismemberment of the Adria distal margin,up to mantle rocks exhumation and oceanization,did not simply result from the syn-rift Jurassic extension but was strongly favored by older structu ral inheritances(the Proto-Canavese Shear Zone),which controlled earlier lithospheric *** findings allowed to redefine in detail(i)the tectono-stratigraphic setting of the Variscan metamorphic basement and the Late Carbonife rous to Early Cretaceous CZ succession,(ii)the role played by inherited Late Carboniferous to Early Triassic structures and(iii)the significance of the CZ in the geodynamic evolution of the Alpine *** large amount of extensional displacement and crustal thinning occurred during different pulses of Late Carbonife rous-Early Triassic strike-slip tectonics is wellconsistent with the role played by long-lived regional-scale wrench faults(e.g.,the East-Variscan Shear Zone),suggesting a re-discussion of models of mantle exhumation driven by low-angle detachment faults as unique efficient mechanism in stretching and thinning continental crust.

关键词： Alpine Tethys Western Alps Jurassic ophiolite Structural inheritance Continental break-up Mantle exhumation

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Sperm priming response to perceived mating opportunities is reduced in male guppies with high baseline sperm production

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Current Zoology 2018年第2期64卷 205-211页

作者： Silvia CATTELAN andrea PILASTRO Department of Biology University of Padova Padova 35131 Italy

Producing sperm is costly and males have been selected to strategically adjust their sperm produc- tion and/or expenditure according to the fitness return associated with a specific mating. For exam- ple, males respond to fluctuations in the mating opportunities by adjusting the number of ＂ready＂ sperm. This phenomenon is known as ＂sperm priming＂ and is interpreted as a strategy to econo- mize the investment in sperm. The cost and benefits of the sperm priming response, however, are expected to depend on a male＇s baseline sperm production （BSP） in the absence of females, because of the different risk of sperm depletion and the nonlinearly increasing costs of sperm pro- duction. We tested this prediction in 2 replicated lines of male guppies Poecilia reticulata that were artificially selected for high and low BSP. BSP has a large genetic variance and a high sire heritabil- ity in guppies, and males respond to the perceived mating opportunities by increasing the number of ＂ready＂ sperm. We investigated whether males with a different BSP differed in their sperm pri- ming response. We found that when the perceived mating opportunities increased, males from low-sperm lines had a stronger sperm priming response than those from high-sperm lines. This result suggests that adaptive plasticity in sperm priming has the potential to evolve in response to different levels of BSP. The comparison between guppy populations with different levels of sperm production would allow to test whether the pattern reported here is also observed at the interpopulation level.

关键词： artificial selection mate availability Poecilia reticulata sperm investment sperm priming sperm production.

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Rare horizontal transmission does not hide long-term inheritance of SINE highly conserved domains in the metazoan evolution

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Current Zoology 2016年第6期62卷 667-674页

作者： andrea LUCHETTI Barbara MANTOVANI Dipartimento di Scienze Biologiche Geologiche e Ambientali--Universit~ di Bologna Via Selmi 3 Bologna 40126Italy

Transposable elements （TEs） are self-replicating, mobile DNA sequences which constitute a significant fraction of eukaryotic genomes. They are generally considered selfish DNA, as their replication and random insertion may have deleterious effects on genome functionalities, although some beneficial effects and evolutionary potential have been recognized. Short interspersed elements （SINEs） are non-autonomous TEs with a modular structure： a small RNA-related head, a body, and a long interspersed element-related tail. Despite their high turnover rate and de novo emergence, the body may retain highly conserved domains （HCDs） shared among divergent SINE families： in metazoans, at least nine HCD-SINEs have been recognized. Data mining on public molecular databases allowed the retrieval of 16 new HCD-SINE families from cnidarian, molluscs, arthropods, and vertebrates. Tracking the ancestry of HCDs on the metazoan phylogeny revealed that some of them date back to the Radiata-Bilateria split. Moreover, phylogenetic and age versus divergence analyses of the most ancient HCDs suggested that long-term vertical inheritance is the rule, with few horizontal transfer events. We suggest that the evolutionary conservation of HCDs may be linked to their potential to serve as recombination hotspots. This indirectly affects host genomes by maintaining active and diverse SINE lineages, whose insertions may impact （either positively or negatively） on the evolution of the genome.

关键词： horizontal transfer Metazoan genome retrotransposons selfish DNA SINEs highly conserved domain vertica inheritance.

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Approximation of the Spectral Fractional Powers of the Laplace-Beltrami Operator

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Numerical Mathematics(Theory,Methods and Applications) 2022年第4期15卷 1193-1218页

作者： andrea Bonito Wenyu Lei Department of Mathematics Texas A&M UniversityCollege StationTX 77843USA SISSA-International School for Advanced Studies Via Bonomea 26534136 TriesteItaly

We consider numerical approximation of spectral fractional Laplace-Beltrami problems on closed *** proposed numerical algorithms rely on their Balakrishnan integral representation and consists a sinc quadrature coupled with standard finite element methods for parametric *** up to a log term,optimal rate of convergence are observed and derived analytically when the discrepancies between the exact solution and its numerical approximations are measured in L^(2)and H^(1).The performances of the algorithms are illustrated on different settings including the approximation of Gaussian fields on surfaces.

关键词： Fractional diffusion Laplace-Beltrami FEM parametric methods on surfaces Gaussian fields

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Abrupt variations of the radiolarian fauna at Mid-Pleistocene climate transition in the South China Sea

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Chinese Science Bulletin 2000年第10期45卷 952-955页

作者： andrea Abelmann Alfred Wegener Institute for Polar and Marine Research 27515 BremerhavenGermany

Based on a detailed study of the radiolarian fauna, the abundance pattern of planktic foraminifera as well as on isotope and sedimentological records, the Mid-Pleistocene climate transition as a multiple transition phenomenon could be recognized at Core 17957-2 from the South China Sea. Distinct changes in the radiolarian/foraminfera ratio, the coarse fraction and the radiolarian assemblages can be related to the global climate cooling observed at the Mid-Pleistocene revolution (MPR) around 900 ka. A pronounced southward shift of the North Equatorial Current that leads to lower sea-surface temperatures in the South China Sea is documented by the shift of tropical to subtropical radiolarian assemblages at 900 ka. Increasing radiolarian abundance after the MPR can be interpreted as a result of stronger upwelling and nutrient supply. These abrupt variations could result from the northern trade wind system and East Asian monsoon circulation.

关键词： radiolarian fauna abrupt variations 900 ka Mid-Pleistocene climate transition South China Sea.

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