Search results for "Scribe"

showing 10 items of 196 documents

Packing a multidisperse system of hard disks in a circular environment.

2008

We consider the problem of finding the densest closed packing of hard disks with proposed different radii in a circular environment, such that the radius of the circumcircle is minimal. With our approach, we are able to find denser packings for various problem instances than known from the literature. Both for the dynamics of the simulation and for the optimum values of the radii of the circumcircles, we find various scaling laws.

Scaling lawMathematics::Metric GeometryGeometryAstrophysics::Earth and Planetary AstrophysicsRadiusCircumscribed circleHeat capacityAstrophysics::Galaxy AstrophysicsMathematicsPhysical review. E, Statistical, nonlinear, and soft matter physics
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Lulwoana sp., a dark septate endophyte (DSE) in roots of Posidonia oceanica (L.) Delile seagrass

2014

Posidonia oceanica is the most common, widespread and important monocotyledon seagrass in the Mediterranean Basin, and hosts a large biodiversity of species, including microorganisms with key roles in the marine environment. In this study, we ascertain the presence of a fungal endophyte in the roots of P. oceanica growing on different substrata (rock, sand and matte) in two Sicilian marine meadows. Staining techniques on root fragments and sections, in combination with microscope observations, were used to visualise the fungal presence and determine the percentage of fungal colonisation (FC) in this tissue. In root fragments, statistical analysis of the FC showed a higher mean in roots anch…

SeptateSettore BIO/07 - EcologiaMolecular Sequence DataPlant ScienceDark septate endophytePlant RootsLulwoanaDark septate mycelium; Lulwoana; Posidonia oceanica; rootSettore BIO/01 - Botanica GeneraleAscomycotaBotanyEndophytesMediterranean SeaInternal transcribed spacerEcology Evolution Behavior and SystematicsMyceliumDark septate myceliumAlismatalesbiologySettore BIO/02 - Botanica SistematicaPosidonia oceanicaSettore AGR/12 - Patologia VegetaleGeneral Medicinebiology.organism_classificationrootRhizodermisColonisationSeagrassItalyPosidonia oceanica
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Sequence analysis of the rDNA spacer of Paracentrotus lividus and observations about pre-rRNA processing. NTS sequence of Paracentrotus lividus rDNA.

1993

We have isolated and sequenced one intergenic region and a small part of the flanking regions (18S and 26S rRNA coding regions) of the rRNA-encoding genes (rDNA) from the sea urchin Paracentrotus lividus. This region is about 3.8 Kb long. Northern blot hybridizations and S1 mapping experiments demonstrated the presence of a partially processed 21S rRNA precursor while has the same 5' terminus as the 32S primary precursor, also in developmental stages characterized by a low rate of rRNA synthesis.

Sequence analysisMolecular Sequence DataRestriction MappingDNA RibosomalParacentrotus lividusIntergenic regionSpecies SpecificitySequence Homology Nucleic AcidGeneticsRNA PrecursorsAnimalsRNA Processing Post-TranscriptionalRRNA processingMolecular BiologyRibosomal DNAbiologyBase SequenceGeneral MedicineSpacer DNARibosomal RNAbiology.organism_classificationMolecular biologyExternal transcribed spacerSea UrchinsOocytesFemaleMolecular biology reports
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Pythium perplexum isolated from soil in France: morphology, molecular characterisation and biological control.

2001

Pythium perplexum (F-926) was isolated from a soil sample taken in the Burgundy region in France. In 1907, it was mistakenly described by Bulter as P. vexans. Despite morphological resemblance, the comparison between the internal transcribed spacer 1 regions of the ribosomal DNA of the two fungi leaves no doubt of their different identities. P. perplexum was found to be highly pathogenic to cucumber seedlings. Damping-off disease of cucumber caused by P. perplexum can effectively be controlled by using the soil bacterium Serratia plymuthica (B-781). The details of the morphology and the molecular characterisation of P. perplexum and its biological control with S. plymuthica are described he…

SerratiabiologyBase SequenceDamping offMolecular Sequence DataBiological pest controlPythiumSequence Analysis DNAbiology.organism_classificationMicrobiologyBotanyAntibiosisDNA Ribosomal SpacerPythiumFranceInternal transcribed spacerCucumis sativusPhycomycetesPest Control BiologicalRibosomal DNACucurbitaceaeBacteriaSoil MicrobiologyPlant DiseasesMicrobiological research
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Towards Concrete Syntax Based Find for Graphical Domain Specific Languages

2019

One of the main reasons why Model-Driven Engineering (MDE) technologies including Domain-specific modelling languages (DSML) have not reached the expected acceptance in the industry is a poor tool support. One of the features with a limited support even in commercial modelling tools is search (find). Typically, MDE tools support only a simple keyword-based textual search functionality. The same is true for the tools built using Domain-specific language (DSL) tool definition frameworks. It is proposed to provide the concrete syntax-based find functionality as a service of a DSL tool definition framework. The find diagrams are defined in a concrete syntax of a DSL. A definition of a DSL is us…

Service (systems architecture)Domain-specific languageConcrete syntaxDigital subscriber lineProgramming languageComputer scienceSimple (abstract algebra)0202 electrical engineering electronic engineering information engineering020207 software engineering020201 artificial intelligence & image processing02 engineering and technologycomputer.software_genrecomputer2019 ACM/IEEE 22nd International Conference on Model Driven Engineering Languages and Systems Companion (MODELS-C)
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STUDIO DI UN AMMORTIZZATORE ELETTROMAGNETICO A RECUPERO DI ENERGIA

2013

Questo lavoro ha come obiettivo principale lo studio teorico e con supporto di software F.E.M. di un dispositivo che consenta recupero energetico da una sospensione automobilistica. In sostituzione allo smorzatore viscoso, che dissipa l’energia cinetica del veicolo a seguito dell’attraversamento di strade sconnesse o ostacoli più marcati, si è usato uno smorzatore elettromagnetico che svolga le funzioni dello smorzatore viscoso consentendo un recupero di energia elettrica. Lo smorzatore elettromagnetico è di tipo a magneti permanenti e il suo funzionamento si basa sul fenomeno dell’induzione elettromagnetica. Il modello matematico descrive il funzionamento dello smorzatore, restituendo i va…

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineMain objective of this work is the theoretical study and support of FEM software of a device that allows for energy recovery from an automotive suspension. In replacing the viscous damper which dissipates the kinetic energy of the vehicle due to rough roads or obstacles more marked an electromagnetic damper is used that performs the functions of the viscous damper allowing a recovery of electricity. The damper is of the electromagnetic type with permanent magnets and its operation is based on the phenomenon of electromagnetic induction. The mathematical model describes the operation of the damper restoring the values of the electrical and mechanical magnitudes as a function of the relative speed between the rod and the stator. Energy recovery has been estimated considering an electric minicar that transits on a bumpy road. The recovered power has a total value of about 250W.
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Phosphate ions detection by using an electrochemical sensor based on laser-scribed graphene oxide on paper

2023

In this work, electrodes based on laser-scribed reduced graphene oxide were fabricated using filter paper as the substrate. To fabricate the electrodes, a water suspension of graphene oxide was filtered to produce a continuous and uniform film of graphene oxide on the filter paper surface. Subsequently, a CO2 laser was used to "write" the working, counter and reference eelctroes by reducing graphene oxide in specific areas to define complete sensors. Referecnce electrodes were then coated with a commercial Ag/AgCl conductive paste to produce a quasi Ag/AgCl reference. As fabricated devices were employed as electrochemical sensors for detection of phosphate ions in water by employing the mol…

Settore ING-IND/23 - Chimica Fisica ApplicataGeneral Chemical EngineeringSettore ING-IND/17 - Impianti Industriali MeccaniciElectrochemistryPhosphate ions Electrochemical sensor Voltammetry Reduced graphene oxide Paper-based sensors Laser scribedSettore ING-INF/01 - Elettronica
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Rateless Codes Performance Analysis in Correlated Channel Model for GEO Free Space Optics Downlinks

2012

Settore ING-INF/03 - TelecomunicazioniFree Space Optics (FSO) technologies for satellite communications offer several advantages: wide bandwidth high rate capability immunity to electromagnetic interference and small equipment size. Thus they are suitable for inter-satellite links deep space communications and also for high data rate ground-to-satellite/satellite-to-ground communications. Nevertheless FSO links suffer impairments that cause power signal degradation at the receiver. Scattering and absorption cause power signal attenuations predictable by suitable deterministic models. Optical turbulence causes random irradiance fluctuations which can generate signal fading events and can thereby only be predicted by statistical models. Attenuation and fading events can corrupt FSO links and so it would be recommended to add mitigation error codes on the communication link. FSO channel can be described as an erasure channel: fading events can cause erasure errors. We have identified in rateless codes (RCs) a suitable solution to be employed in FSO links. RCs do not need feedback and they add a redundant coding on the source data that allows the receiver to recover the whole payload despite erasure errors. We implemented two different of rateless codes: Luby Transform (LT) and Raptor. We analyzed their performances on a simulated turbulent GEO FSO downlink (1 Gbps - OOK modulation) at a 106 μm wavelength and for different values of zenith angles. Assuming a plane-wave propagation and employing Hufnagel-Valley we modeled the downlink using: 1) a temporal correlated channel model based on Gamma-Gamma probability distribution and 2) an irradiance covariance function that we converted on a time function using Taylor frozen eddies hypothesis. Our new channel model is able to simulate irradiance fluctuations at different turbulence conditions as it will be shown in the full paper. We will also report performance results of LT and Raptor codes at overhead range varying between 0 and 50% and for different values of source packets.Settore ING-INF/01 - Elettronica
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Prospettive di riforma della tutela penale dell'ambiente nel diritto europeo e sovranazionale

2021

Il saggio descrive le prospettive di riforma della normativa penale ambientale, di recente delineatesi tanto a livello internazionale, quanto in ambito europeo. Pur non spingendosi sino a prevedere i possibili esiti delle dinamiche in corso, il contributo non rinuncia ad analizzarne luci ed ombre, anche alla luce delle difficoltà di tipizzazione delle fattispecie incriminatrici determinata dalla particolare complessità della materia ambientale.

Settore IUS/17 - Diritto PenaleThe essay describes the prospects of reform of environmental criminal law recently outlined both at international and European level. Although the contribution does not go so far as to predict the possible outcomes of the dynamics in progress it does not shy away from analysing the lights and shadows also in the light of the difficulties of typifying criminal offences determined by the particular complexity of environmental matters.
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Una tragedia della Belle époque. Riflessioni su "Adriana Lecouvreur" di Francesco Cilea

2017

Il saggio delinea i percorsi biografici e artistici di Francesco Cilea sullo sfondo della politica e della cultura italiane fra Otto e Novecento, con particolare riferimento al fenomeno della Giovine Scuola e del Verismo. Inoltre, vengono analizzate la fonte letteraria, la genesi, la drammaturgia e i caratteri musicali dell'opera.

Settore L-ART/07 - Musicologia E Storia Della MusicaItalia Musica italiana Teatro musicale Giovine Scuola Verismo Sonzogno Francesco Cilea Eugene Scribe Adriana Lecouvreur
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