cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optimal block-tridiagonalization of matrices for coherent charge transport
Creators: name: Wimmer, Michael
name: Richter, Klaus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Numerical quantum transport calculations are commonly based on a tight-binding formulation. A wide class of quantum transport algorithms requires the tight-binding Hamiltonian to be in the form of a block-tridiagonal matrix. Here, we develop a matrix reordering algorithm based on graph partitioning techniques that yields the optimal block-tridiagonal form for quantum transport. The reordered Hamiltonian can lead to significant performance gains in transport calculations, and allows to apply conventional two-terminal algorithms to arbitrary complex geometries, including multi-terminal structures. The block-tridiagonalization algorithm can thus be the foundation for a generic quantum transport code, applicable to arbitrary tight-binding systems. We demonstrate the power of this approach by applying the block-tridiagonalization algorithm together with the recursive Green's function algorithm to various examples of mesoscopic transport in two-dimensional electron gases in semiconductors and graphene.
description: 28 pages, 14 figures; submitted to Journal of Computational Physics
Purification and properties of a new carlavirus from dandelion
Creators: name: Johns, Lois
Publisher: name: University of British Columbia
Year: 2010

description: A carlavirus was isolated from naturally-infected dandelions in the Okanagan Valley, B.C. In total, 31 plant species belonging to 12 families were tested as possible hosts for the dandelion virus. In only four families (Amaranthaceae, Chenopodiaceae, Compositae, Solanaceae) were susceptible species found. The virus was contained as local lesions in Gomphrena globosa and Datura stramonium and became systemic in Chenopodium amaranticolor, C. quinoa and Taraxacum officinale. The carlavirus, for which the name Dandelion Virus S (DVS) is proposed, has slightly curved particles with normal length 637 nm and width 12-13 nm. A purification scheme was developed that yielded 20-30 mg of virus per kg of C. quinoa leaf and stem tissue. Partially purified virus preparations had a single nucleoprotein component in rate zonal sucrose and cesium chloride density gradient centrifugation. The UV absorption spectrum has a maximum at 259 nm and a minimum at 245 nm. The ratio, of A[sub max]/A[sub min] is approximately 1.1; of A₂₆₀/A₂₈₀,1.4. In sap from infected C. quinoa, DVS had a thermal inactivation point of 75-80°; an infectivity dilution end point of 2 x 10⁻⁵ to 2 x 10⁻⁶ ; a longevity in vitro of 4-5 days at 23°, 28-56 days at 4° and at least 16.5 months in a lyophilized state at 23°. An antiserum against DVS was prepared by four intramuscular injections of 1 mg each and the maximum homologous titre was 40,960. Two carlaviruses with similar symptoms in C. quinoa, Peru virus S (PeVS) and Helenium virus S (HVS) were purified for antisera production and comparative serological testing. Antisera to other carlaviruses were also used to determine if serological relationships existed with DVS and other members of the group. Serologically, DVS is related to potato virus S (PVS) and PeVS, and distantly related to chrysanthemum virus B (CVB), Helenium virus S (HVS) and narcissus latent virus (NLV).
Observability of the Vertical Shear Instability in protoplanetary disk CO kinematics
Creators: name: Barraza-Alfaro, Marcelo
name: Flock, Mario
name: Marino, Sebastian
name: Pérez, Sebastián
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context. Dynamical and turbulent motions of gas in a protoplanetary disk are crucial for their evolution and affect planet formation. Recent observations suggest weak turbulence in the disk's outer regions. However, the physical mechanism of turbulence in these outer regions remains uncertain. The vertical shear instability (VSI) is a promising mechanism to produce turbulence in disks. Aims. Our aim is to study the observability of the gas velocity structure produced by the VSI via CO kinematics with ALMA. Methods. We perform global 3D hydrodynamical simulations of a VSI-unstable disk. We post-process the simulation results with radiative transfer calculations, and produce synthetic predictions of CO rotational emission lines. Following, we compute the line of sight velocity map, and its deviations from a sub-Keplerian equilibrium solution. We explore the detectability of the VSI by identifying kinematic signatures using realistic simulated observations. Results. Our 3D simulations of the VSI show the steady state dynamics of the gas in great detail. From the velocity structure we infer a turbulent stress value of $α_{rϕ}=1.4 \times 10^{-4}$. On large scales, we observe velocity deviations of 50 m s$^{-1}$ as axisymmetric rings. We find optimal conditions at $i \lesssim 20^{\circ}$ to trace for the kinematic structures of the VSI. We found that current diagnostics to constrain gas turbulence from non-thermal broadening of the line emission are not applicable to anisotropic VSI turbulence. Conclusions. The detection of kinematic signatures produced by the VSI is possible with ALMA. Observations including an extended antenna configuration combined with the highest spectral resolution available are needed for robust detection. The characterization of the large-scale velocity perturbations is required to constrain the turbulence level produced by the VSI from gas observations.
description: Accepted for publication in A&A. 17 pages with 10 figures and 1 table
VORTIT ITALICE. LA LINGUA ITALIANA DELLA TRADUZIONE. LINEE GUIDA PER LA DEFINIZIONE DEL TRADUTTESE DALLE LINGUE CLASSICHE
Creators: name: Bigoni, Laura
name: Palma, Marco
Publisher: name: Italiano LinguaDue
Year: 2021

description: Tradurre in italiano comporta scelte stilistiche e lessicali differenti a seconda che la lingua di partenza sia classica oppure moderna. Tali differenze emergono in maniera ancor più accentuata nel contesto scolastico, dove il traduttore è ancora in corso di apprendimento della lingua. In questo studio si presenta il fenomeno del traduttese dalle lingue classiche in ambito scolastico e se ne illustrano le caratteristiche principali. Le considerazioni linguistiche trovano riscontro in un’analisi quantitativa basata su un corpus pilota, dove si mostra che un modello statistico è in grado di discriminare testi in italiano che sono stati originariamente concepiti in italiano da traduzioni dal latino. Questo approccio interdisciplinare è potenzialmente in grado di fornire ulteriori considerazioni sul fenomeno qualora applicato su un corpus controllabile e per questo viene corredato da un protocollo di esperimento da condurre nelle scuole secondarie di secondo grado. Vortit Italice. The Italian language of translation. Towards the definition of translationese from ancient languages The task of translating ancient languages into Italian has distinctive features with respect translating from modern, currently spoken languages. The differences are even more pronounced in translation practices at school, where students are still developing familiarity with the source language. In this paper, the main aspects of translationese from ancient languages to Italian in a didactic context are discussed. The linguistic arguments at the base of this concept are also supported by a preliminary quantitative analysis performed on a pilot corpus, which indicates that simple statistical models can distinguish texts originally written in Italian and those translated from Latin with high accuracy. These interdisciplinary considerations reveal the need for collecting and analyzing high school students’ translations through an ad hoc experiment, and some practical guidelines are proposed.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
LA VALORIZZAZIONE DELLE OPERE LETTERARIE, COME FONTE SPECIALE STORICA E CULTURALE, NELL’INSEGNAMENTO-APPRENDIMENTO DELLE LINGUE STRANIERE NELL’AMBITO DELL’APPROCCIO MULTICULTURALE DELL’EPOCA MODERNA: IL CASO DELL’ITALIANO IN GRECIA
Creators: name: Milioni, Georgia
name: Drakouli, Athanasia
name: Mamidaki, Sofia
Publisher: name: Italiano LinguaDue
Year: 2021

description: Per molti secoli, le opere letterarie hanno rappresentato una delle fonti valide da cui attingeva la scienza della storiografia dell’occidente. Dopo il 19° secolo, avvalendosi di strumenti metodologici pari a quelli usati nelle altre scienze (antropologia, archeologia ecc), la storiografia ha definito le fonti scritte come quelle più oggettive e valide per la ricerca, superando così gli altri generi di testimonianze. Ciò nonostante, vi sono alcuni esempi (pochi, ma significativi) in cui opere di letteratura vengono usate come preziosi strumenti di storia, in didattica. Nell’ambito della lezione di lingua e in particolare di quella straniera (sia come L2 che come LS), ripercorrere le opere letterarie usate come materiale didattico, in passato avrebbe costituito una validissima fonte di ricostruzione del trascorso storico dell’insegnamento della lingua studiata, mentre il suo utilizzo in qualsiasi momento avrebbe costituito un eccezionale manuale di attività didattica, tramite cui affrontare non solo la sostanza, ma anche la qualità di un insuperabile testimone dello sviluppo di un Paese e del suo popolo (evidenziando anche, dove è possibile, aspetti legati all’interazione tra la cultura e la storia locali e quelle della lingua target). The valorization of literary works, as a special historical and cultural source, in the teaching-learning of foreign languages within a multicultural approach in the modern era: the case of Italian in Greece For many centuries, literary works represented one of the valid sources from which the science of historiography in the West was based. After the 19th century, using methodological tools similar to those used in other sciences (anthropology, archaeology, etc.), historiography has defined written sources as the most objective and valid for research, thus surpassing other genres of evidence. Nevertheless, there are some examples, (few, but significant) in which works of literature are used as valuable tools of history, in teaching. In the context of the language lessons and in particular of foreign languages (both as L2 and FL), retracing the literary works used as teaching material in the past would have constituted a very valid source of reconstruction of the historical past for teaching the language being studied. Its use at any time would have constituted an exceptional teaching manual for addressing not only the substance, but also the unsurpassable witness of the development of a country and its people, ( highlighting, where possible, aspects related to the interaction between the local culture and history and those of the target language).
description: Italiano LinguaDue, V. 12 N. 2 (2020)
PLURILINGUISMO NEL CINEMA: TRA REALISMO E PARODIA
Creators: name: Cicala, Domenica Elisa
Publisher: name: Italiano LinguaDue
Year: 2021

description: Dopo una breve riflessione introduttiva dedicata all’uso del testo audiovisivo a lezione, nel presente intervento ci si propone di sottolineare il potenziale didattico di sequenze filmiche, facendo risaltare la funzione del mezzo cinematografico come spazio di confluenza contenente pluralità linguistiche e varietà regionali di italiano. Plurilingualism in cinema: between realism and parody After a short introduction dedicated to the didactic use of audiovisual texts, we underline the didactic potential of film sequences and highlight the function of the cinematographic medium as a space of confluence that reflects linguistic plurality and regional varieties of Italian.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
Transverse Wave Propagation in Relativistic Two-fluid Plasmas in de Sitter Space
Creators: name: Rahman, M. Atiqur
name: Ali, M. Hossain
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate transverse electromagnetic waves propagating in a plasma in the de Sitter space. Using the 3+1 formalism we derive the relativistic two-fluid equations to take account of the effects due to the horizon and describe the set of simultaneous linear equations for the perturbations. We use a local approximation to investigate the one-dimensional radial propagation of Alfvén and high frequency electromagnetic waves and solve the dispersion relation for these waves numerically.
description: 19 pages, 12 figures
IL PLURILINGUISMO NELLA CANZONE DIALETTALE ITALIANA DA DE ANDRÉ A VAN DE SFROOS: QUESTIONI TEORICHE E RICADUTE DIDATTICHE
Creators: name: Bozzo, Davide
Publisher: name: Italiano LinguaDue
Year: 2021

description: Il legame della canzone italiana con il dialetto e il plurilinguismo non è una circostanza casuale, ma un dato costituivo che discende non solo dalla sua origine storica, connessa al variegato quadro sociolinguistico del paese, ma anche da una fondamentale questione teorica, quella del problematico rapporto tra la nostra lingua e la moderna musica leggera. Non è un caso se Fabrizio De André, antesignano del ritorno al dialetto nella canzone d’autore, ha giustificato l’abbandono dell’italiano in favore del genovese con la necessità di dar corpo a un diverso rapporto tra suono e parola. E sarà proprio il frutto di tale svolta, un disco intessuto di plurilinguismo linguistico e musicale, a dare il la alla stagione neodialettale, la quale rispecchia nelle proprie modalità espressive gli sviluppi del contesto sociolinguistico, con il dialetto che recupera vitalità e si ritaglia nuovi spazi di convivenza con l’italiano. Stiamo parlando di quell’alternanza e mescolanza di codici che informa i testi di Davide Van De Sfroos e offre interessanti opportunità didattiche nell’ambito dell’insegnamento a stranieri. Multilingualism in Italian dialectal songs from De André to Van de Sfroos: theoretical questions and didactic repercussions The link between Italian songs, dialects and multilingualism is not a random circumstance, but a constitutive fact that derives not only from historical origin, connected to the variegated sociolinguistic framework of Italy, but also from a fundamental theoretical question regarding the problematic relationship between the Italian language and modern pop music. It is no coincidence that Fabrizio De André, forerunner in the return to dialect in songwriting, justified abandoning Italian in favor of the Genoese dialect with the need to give substance to a different relationship between sounds and words. This turning point led to a recording interwoven with linguistic and musical multilingualism, that gave rise to the neo-dialectal movement, which reflected the developments of the sociolinguistic context in its expressive modes, where dialect recovered its vitality and carved out new spaces for existing alongside Italian. We refer to the alternation and mixture of codes that informed the texts of Davide Van De Sfroos and offers interesting teaching opportunities for foreign students.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
Cosmological constraints on general, single field inflation
Creators: name: Agarwal, Nishant
name: Bean, Rachel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Inflation is now an accepted paradigm in standard cosmology, with its predictions consistent with observations of the cosmic microwave background. It lacks, however, a firm physical theory, with many possible theoretical origins beyond the simplest, canonical, slow-roll inflation, including Dirac-Born-Infeld inflation and k-inflation. We discuss how a hierarchy of Hubble flow parameters, extended to include the evolution of the inflationary sound speed, can be applied to compare a general, single field inflationary action with cosmological observational data. We show that it is important to calculate the precise scalar and tensor primordial power spectra by integrating the full flow and perturbation equations, since values of observables can deviate appreciably from those obtained using typical second-order Taylor expanded approximations in flow parameters. As part of this, we find that a commonly applied approximation for the tensor to scalar ratio, r \approx 16 c_sε, becomes poor (deviating by as much as 50%) as c_s deviates from 1 and hence the Taylor expansion including next-to-leading order contribution terms involving c_s is required. By integrating the full flow equations, we use a Monte-Carlo-Markov-Chain approach to impose constraints on the parameter space of general single field inflation, and reconstruct the properties of such an underlying theory in light of recent cosmic microwave background and large-scale structure observations.
description: 15 pages, 10 figures, minor changes made, version to appear in Physical Review D
Multi-patch Feature Pyramid Network for Weakly Supervised Object Detection in Optical Remote Sensing Images
Creators: name: Shamsolmoali, Pourya
name: Chanussot, Jocelyn
name: Zareapoor, Masoumeh
name: Zhou, Huiyu
name: Yang, Jie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Object detection is a challenging task in remote sensing because objects only occupy a few pixels in the images, and the models are required to simultaneously learn object locations and detection. Even though the established approaches well perform for the objects of regular sizes, they achieve weak performance when analyzing small ones or getting stuck in the local minima (e.g. false object parts). Two possible issues stand in their way. First, the existing methods struggle to perform stably on the detection of small objects because of the complicated background. Second, most of the standard methods used hand-crafted features, and do not work well on the detection of objects parts of which are missing. We here address the above issues and propose a new architecture with a multiple patch feature pyramid network (MPFP-Net). Different from the current models that during training only pursue the most discriminative patches, in MPFPNet the patches are divided into class-affiliated subsets, in which the patches are related and based on the primary loss function, a sequence of smooth loss functions are determined for the subsets to improve the model for collecting small object parts. To enhance the feature representation for patch selection, we introduce an effective method to regularize the residual values and make the fusion transition layers strictly norm-preserving. The network contains bottom-up and crosswise connections to fuse the features of different scales to achieve better accuracy, compared to several state-of-the-art object detection models. Also, the developed architecture is more efficient than the baselines.
NEOPLURILINGUISMO E DIDATTICA INTEGRATIVA DELLA LINGUA, DELLA LETTERATURA E DEL CINEMA NELLA CLASSE DI LINGUA STRANIERA
Creators: name: Bartoli Kucher, Simona
Publisher: name: Italiano LinguaDue
Year: 2021

description: In questo articolo si vuole presentare un nuovo approccio didattico ancora poco sviluppato nella didattica dell’italiano, che declina la possibilità di operazionalizzare nella classe di italiano come lingua straniera e lingua seconda testi letterari e film connessi dal loro carattere transmediale e dall’uso di codici linguistici plurali. Si tratta di narrazioni accomunate dal fatto di essere nate negli interstizi tra lingue e culture e dal neoplurilinguismo dell’Italia contemporanea; testi che – come dimostrato anche dalla nostra ricerca empirica – possono diventare molto produttivi nell’insegnamento dell’italiano. Neoplurilingualism and integrative teaching of language, literature and cinema in foreign language classes This paper presents a new didactic approach in the field of Italian language teaching. It provides an introduction by bringing together literary texts, films and culture-related theoretical perspectives. Transcultural theories are applied to texts connected by their transmedial character and the use of plural linguistic codes. These are narrative texts and films that straddle languages and cultures, linked by the neoplurilingualism of contemporary Italy: texts that – as shown by our empirical research – can become very productive in the teaching of Italian as foreign or second language.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
Bimolecular chemistry in the ultracold regime
Creators: name: Liu, Yu
name: Ni, Kang-Kuen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Advances in atomic, molecular, and optical (AMO) physics techniques allowed the cooling of simple molecules down to the ultracold regime ($\lesssim$ 1 mK), and opened the opportunities to study chemical reactions with unprecedented levels of control. This review covers recent developments in studying bimolecular chemistry at ultralow temperatures. We begin with a brief overview of methods for producing, manipulating, and detecting ultracold molecules. We then survey experimental works that exploit the controllability of ultracold molecules to probe and modify their long-range interactions. Further combining the use of physical chemistry techniques, such as mass spectrometry and ion imaging, significantly improved the detection of ultracold reactions and enabled explorations of their dynamics in the short-range. We discuss a series of studies on the reaction KRb + KRb $\rightarrow$ K$_2$ + Rb$_2$ initiated below 1 $μ$K, including the direct observation of a long-lived complex, the demonstration of product rotational state control via conserved nuclear spins, and a test of the statistical model using the complete quantum state distribution of the products.
description: 25 pages, 9 figures, submitted to Annual Review of Physical Chemistry on 06/15/2021
CLIL-L2: DIRITTO ED ECONOMIA IN ITALIANO. STUDIO DI VALUTAZIONE SULL’INTRODUZIONE DELLA METODOLOGIA CLIL-ITALIANO NELLA SCUOLA SECONDARIA DI SECONDO GRADO IN LINGUA TEDESCA IN ALTO ADIGE
Creators: name: Mayr, Gisela
Publisher: name: Italiano LinguaDue
Year: 2021

description: Il presente contributo è uno studio di valutazione sull’introduzione della metodologia CLIL Italiano L2 per la materia “legge ed economia” in una scuola secondaria di secondo grado in lingua tedesca in Alto Adige. L’apprendimento CLIL per l’italiano L2 è nuovo e tuttora inesplorato, ed è quindi stato necessario affiancarne l’introduzione con un adeguato supporto scientifico, al fine di valutarne il successo didattico e di identificare le esigenze dei discenti, in modo da potere migliorare l’offerta formativa futura. Nella prima fase pertanto si è scelto di approfondire l’aspetto dell’apprendimento dei discenti per mezzo di questionari di autovalutazione, tesi a evidenziare quali forme di apprendimento formali ed informali si sviluppino meglio in questo percorso, per verificare come venga percepito l’insegnamento CLIL-L2 e quali vantaggi e svantaggi emergano. Grazie a due test in ambito lessicale è stato possibile inoltre, osservare cambiamenti nel repertorio plurilingue. CLIL- L2: Law and Economy in Italian. An evaluative study on the introduction of CLIL- methodology for Italian in a secondary school in Alto Adige This paper is an evaluative study on the introduction of CLIL methodology for Italian L2 in a “Law and economics” class at a secondary school in Alto Adige. Since the CLIL approach in this area is new and still unexplored, it seemed necessary to accompany its introduction with adequate scientific support, in order to evaluate the success and identify students’ needs so as to improve future educational use. During the first phase, it was aspects of students’ leaning were explored using self-evaluation questionnaires aimed at surveying which forms of formal and informal learning develop better, verifying how CLIL-L2 Italian learning is perceived and what advantages and disadvantages emerged. Thanks to two tests in the field of lexical acquisition, it was possible to observe the changes in the students’ plurilingual repertoire.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
In situ accurate determination of the zero time delay between two independent ultrashort laser pulses by observing the oscillation of an atomic excited wave packet
Creators: name: Zhang, Qun
name: Hepburn, John W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We propose a novel method that uses the oscillation of an atomic excited wave packet observed through a pump-probe technique to accurately determine the zero time delay between a pair of ultrashort laser pulses. This physically-based approach provides an easy fix for the intractable problem of synchronizing two different femtosecond laser pulses in a practical experimental environment, especially where an in situ time zero measurement with high accuracy is required.
description: 12 pages, 3 figures, accepted to Optics Letters
IL POTENZIALE DELL’ITALIANO COME LINGUA PONTE: RISULTATI DI UNO STUDIO BASATO SU INTERVISTE CON (FUTURI) INSEGNANTI D’ITALIANO
Creators: name: Scheitza, Jan
name: Visser, Judith
Publisher: name: Italiano LinguaDue
Year: 2021

description: A causa dell’abituale sequenza linguistica nel sistema scolastico tedesco, l’italiano come “lingua ponte” viene difficilmente preso in considerazione. Tuttavia, tra gli apprendenti e tra gli (futuri) insegnanti esistono persone con un contesto migratorio italiano. Perciò, una didattica del plurilinguismo potrebbe rispettare il potenziale di questa lingua di origine come lingua ponte. L’articolo intende discutere se l’italiano presenti questo potenziale o no, tenendo particolarmente conto della visione soggettiva di insegnanti e apprendenti. Si basa su interviste svolte presso l’università della Ruhr a Bochum con 31 (futuri) insegnanti d’italiano. L’obiettivo è valutare il potenziale dell’italiano come lingua ponte alla luce delle interviste. Verranno anche discussi approcci ad una didattica del plurilinguismo che tengono anche conto delle strategie di apprendimento e delle esperienze linguistiche personali. The potential of Italian as a bridge language: results of a study based on interviews with (future) Italian teachers Due to the language sequence in the German education system, models of multilingual teaching tend to ignore Italian as a bridge language. However, among students and (future) teachers, there are people with an Italian migration background. Therefore, multilingual teaching could take the potential of this heritage language as a bridge language into account. The article discusses this potential with a special focus on the subjective views of teachers and students, based on interviews carried out at the University of Bochum with 31 (future) teachers of Italian. The interviews were analyzed with regard to the potential of Italian as a bridge language. Furthermore, multilingual teaching approaches that also take learning strategies and linguistic attitudes into account will be discussed.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
A CASA NEL MONDO: RIFLESSIONI SU UNA DIDATTICA DELL’INTERCOMPRENSIONE IN MODALITÀ BLENDED
Creators: name: Capacchietti, Francesca
Publisher: name: Italiano LinguaDue
Year: 2021

description: Nell’ambito del progetto A casa nel mondo/In der Welt zu Hause l’Istituto di Romanistica dell’Università di Aquisgrana mira a realizzare materiale didattico relativo alle strategie intercomprensive proposte nel metodo EuroComRom (cfr. Klein, Stegmann, 1999) per promuovere il plurilinguismo e la consapevolezza metalinguistica degli studenti universitari, sfruttando le loro preconoscenze e il grandissimo potenziale delle lingue romanze. In questa cornice il presente lavoro offre una riflessione teorica sui principi di realizzazione di suddetto materiale didattico e sui vantaggi delle modalità flipped e blended: le considerazioni proposte sono supportate a titolo esemplificativo dai risultati di un’indagine sull’intercomprensione condotta tra 15 studenti del Centro Linguistico d’Ateneo dell’Università di Aquisgrana. At home in the world: reflections on teaching intercomprehension using blended learning The RWTH Aachen Romance Studies Institute aims at creating didactic material related to the EuroComRom intercomprehensive strategies (cfr. Klein, Stegmann, 1999) in order to help university students develop multilingual competence and metalinguistic awareness. The premise of the project A casa nel mondo/In der Welt zu Hause (literally At home in the world) is to take advantage of students’ previous knowledge as well as similarities between Romance languages. This paper offers some theoretical considerations related to the creation of teaching materials and the benefits of both the flipped classroom and blended learning. These considerations are supported by data collection results among 15 students at the RWTH University Linguistic Center, whose answers are discussed and exemplified in the paper.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
Building the full PMNS Matrix from six independent Majorana-type phases
Creators: name: Branco, Gustavo C.
name: Rebelo, M. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the framework of three light Majorana neutrinos, we show how to reconstruct, through the use of 3 x 3 unitarity, the full PMNS matrix from six independent Majorana-type phases. In particular, we express the strength of Dirac-type CP violation in terms of these Majorana-type phases by writing the area of the unitarity triangles in terms of these phases. We also study how these six Majorana phases appear in CP-odd weak basis invariants as well as in leptonic asymmetries relevant for flavoured leptogenesis.
description: 20 pages
Nonlinear switching of low-index defect modes in photonic lattices
Creators: name: Ye, Fangwei
name: Kartashov, Yaroslav V.
name: Vysloukh, Victor A.
name: Torner, Lluis
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We address nonlinear signal switching between two low-index defect channels induced in periodic optical lattices. In contrast to conventional directional couplers, where the guiding mechanism is total internal reflection or refraction, in such Bragg-type coupler, the guidance is of a photonic-bandgap origin. The coupling length in the low-index coupler is controlled by the lattice parameters and by the channel spacing. In the nonlinear regime the Bragg-type coupler behaves as an all-optical switch, exhibiting a remarkable difference of switching power for focusing versus defocusing nonlinearity.
description: 13 pages, 4 figures, to appear in Physical Review A
Liquid walls and interfaces in arbitrary directions stabilized by vibrations
Creators: name: Apffel, Benjamin
name: Hidalgo-Caballero, Samuel
name: Eddi, Antonin
name: Fort, Emmanuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Gravity shapes liquids and play a crucial role in their internal balance. Creating new equilibrium configurations irrespective of the presence of a gravitational field is challenging with applications on earth as well as in zero-gravity environments. Vibrations are known to alter the shape of liquid interfaces and to also to change internal dynamics and stability in depth. Here, we show that vibrations can also create an "artificial gravity" in any direction. We demonstrate that a liquid can maintain an inclined interface when shaken in an arbitrary direction. A necessary condition for the equilibrium to occur is the existence of a velocity gradient determined by dynamical boundary conditions. However, no-slip boundary condition and incompressibility can perturb the required velocity profile leading to a destabilization of the equilibrium. We show that liquid layers provide a solution and liquid walls of several centimeters in height can thus be stabilized. We show that the buoyancy equilibrium is not affected by the forcing.
description: 4 figures
L’INCLUSIONE DEGLI ITALIANI NELLA SOCIETÀ E NELLE SCUOLE MALTESI
Creators: name: Caruana, Sandro
Publisher: name: Italiano LinguaDue
Year: 2021

description: La demografia delle isole maltesi è cambiata recentemente, con l’arrivo di molte persone di nazionalità diverse, compresi italiani che formano un gruppo numeroso ed eterogeneo. L’inclusione degli italiani a Malta è favorita dalle affinità culturali tra i due paesi, e vivere e lavorare in una comunità dove si parla inglese viene considerata un vantaggio. Ci sono molti legami tra Malta e l’Italia che hanno portato a degli scambi commerciali ed economici regolari, positivi per ambedue i paesi. Tuttavia, come accade soventemente quando ci si trasferisce dal proprio paese nativo ad un altro, ci sono anche delle difficoltà. In questo lavoro, dopo aver fornito una descrizione del trasferimento recente di italiani a Malta, mi focalizzo sulla scuola come microcosmo della società per presentare sfide e opportunità in questo contesto come una riflessione di quello più ampio. The inclusion of Italians in Maltese society and schools The demography of the Maltese islands has changed significantly recently, with an influx of persons of different nationalities, where Italians form a large, heterogenous group. The inclusion of Italians in Malta is favored by cultural affinities between the two countries, who live and work in a community where English is widely spoken, which is also considered advantageous. There are several ties between Malta and Italy which have led to steady economic and commercial exchanges that are mutually beneficial. Nevertheless, as occurs commonly when one leaves one’s homeland to settle in another place, a number of difficulties are encountered. In this paper, after presenting a general overview regarding Italians who have moved to Malta recently, I focus on schools as a microcosm of society, to present the challenges and opportunities, as a reflection of the wider context.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
DIDATTICA DELLA SCRITTURA IN CLASSI PLURILINGUI NELLA SCUOLA PRIMARIA. RISULTATI DI UNA SPERIMENTAZIONE
Creators: name: Clemenzi, Laura
name: Gualdo, Riccardo
Publisher: name: Italiano LinguaDue
Year: 2021

description: Il contributo presenta e commenta i risultati di una sperimentazione didattica condotta nell’anno scolastico 2017/2018 in due classi terze di una scuola primaria della provincia di Viterbo, un’area caratterizzata da un’elevata incidenza di alunni stranieri sul totale degli iscritti in tutti gli ordini scolastici. La sperimentazione, ispirata al progetto Osservare l’interlingua, si è concentrata sull’apprendimento della scrittura descrittiva e narrativa e sui problemi incontrati da alunni con differenti difficoltà di apprendimento. Il contributo dà conto di come gli alunni e soprattutto le insegnanti hanno valutato la sperimentazione. Teaching of writing to primary school’s pupils in multilingual classes. Results of an experimentation This paper presents and comments on the results of an educational experience conducted during the 2017/2018 school year in two third-grade classes at a primary school in the province of Viterbo, in an area characterized by a high incidence of foreign students enrolled in both primary and secondary school levels. Modelled after the Osservare l’interlingua Project, the experience focused on the learning of descriptive and narrative writing and the problems faced by students with different learning difficulties. The paper briefly reports the students’ and especially the teachers’ comments.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
title: Large Scale Finite Element Simulation and Modeling Using GIS/CAD for Environmental Flows in Urban Area
Creators: name: Kashiyama, Kazuo
name: Hamada, Hidetaka
name: Taniguchi, Takeo
Publisher: name: Bauhaus-Universität Weimar
Year: 2004
Subjects: subject: Geoinformationssystem
subject: Finite-Elemente-Methode
subject: Stadtplanung
subject: 620

description: A large-scale computer modeling and simulation method is presented for environmental flows in urban area. Several GIS and CAD data were used for the preparation of shape model and an automatic mesh generation method based on Delaunay method was developed. Parallel finite element method based on domain decomposition method was employed for the numerical simulation of natural phenomena. The present method was applied to the simulation of flood flow and wind flow in urban area. The present method is shown to be a useful planning and design tool for the natural disasters and the change of environments.
Relations between Infinitesimal Non-Commutative Cumulants
Creators: name: Celestino, Adrián
name: Ebrahimi-Fard, Kurusch
name: Perales, Daniel
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2021

description: Boolean, free and monotone cumulants as well as relations among them, have proven to be important in the study of non-commutative probability theory. Quite notably, Boolean cumulants were successfully used to study free infinite divisibility via the Boolean Bercovici-Pata bijection. On the other hand, in recent years the concept of infinitesimal non-commutative probability has been developed, together with the notion of infinitesimal cumulants which can be useful in the context of combinatorial questions. In this paper, we show that the known relations among free, Boolean and monotone cumulants still hold in the infinitesimal framework. Our approach is based on the use of algebra of Grassmann numbers. Formulas involving infinitesimal cumulants can be obtained by applying a formal derivation to known formulas. The relations between the various types of cumulants turn out to be captured via the shuffle algebra approach to moment-cumulant relations in non-commutative probability theory. In this formulation, (free, Boolean and monotone) cumulants are represented as elements of the Lie algebra of infinitesimal characters over a particular combinatorial Hopf algebra. The latter consists of the graded connected double tensor algebra defined over a non-commutative probability space and is neither commutative nor cocommutative. In this note it is shown how the shuffle algebra approach naturally extends to the notion of infinitesimal non-commutative probability space. The basic step consists in replacing the base field as target space of linear Hopf algebra maps by the algebra of Grassmann numbers defined over the base field. We also consider the infinitesimal analog of the Boolean Bercovici-Pata map.
description: DOCUMENTA MATHEMATICA, Vol 26 (2021), p. 1145-1185
Revealing components of the galaxy population through nonparametric techniques
Creators: name: Bamford, Steven P.
name: Rojas, Alex L.
name: Nichol, Robert C.
name: Miller, Christopher J.
name: Wasserman, Larry
name: Genovese, Christopher R.
name: Freeman, Peter E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The distributions of galaxy properties vary with environment, and are often multimodal, suggesting that the galaxy population may be a combination of multiple components. The behaviour of these components versus environment holds details about the processes of galaxy development. To release this information we apply a novel, nonparametric statistical technique, identifying four components present in the distribution of galaxy H$α$ emission-line equivalent-widths. We interpret these components as passive, star-forming, and two varieties of active galactic nuclei. Independent of this interpretation, the properties of each component are remarkably constant as a function of environment. Only their relative proportions display substantial variation. The galaxy population thus appears to comprise distinct components which are individually independent of environment, with galaxies rapidly transitioning between components as they move into denser environments.
description: 12 pages, 10 figures, accepted for publication in MNRAS
STRATEGIE DIDATTICHE NELLE CLASSI PLURILINGUI: UNA SPERIMENTAZIONE IN CONTESTO SPORTIVO
Creators: name: Siebetcheu, Raymond
Publisher: name: Italiano LinguaDue
Year: 2021

description: Il presente contributo illustra alcuni risultati della ricerca svolta nell’ambito del progetto Multisport attuato presso l’Università per Stranieri di Siena. Obiettivo di questo articolo è quello di indagare sulle peculiarità della classe plurilingue nel contesto sportivo in generale, e calcistico in particolare, illustrando le sue principali implicazioni nella didattica dell’italiano. I risultati presentati si basano su un’indagine che ha coinvolto 162 informanti, di cui 30 professionisti di Serie A, 25 giocatori richiedenti asilo che militano nel campionato dilettantistico e 107 studenti del Liceo sportivo di Siena. I dati sono stati raccolti tramite una serie di interviste, di osservazioni partecipanti e con l’utilizzo di un questionario sociolinguistico. Tali strumenti hanno consentito di analizzare i profili e bisogni linguistici degli informanti. Grazie alle informazioni raccolte nell’ambito della ricerca, l’articolo propone alcune attività didattiche in classe e sul terreno di gioco per motivare gli studenti-atleti. Dalla sperimentazione in campo e in aula, risulta che tra le strategie didattiche possibilmente attuabili nei contesti sportivi possono essere presi in considerazione percorsi legati alla didattica ludica, multisensoriale, modulare, orientata all’azione, nella cornice di un apprendimento cooperativo. Teaching strategies in multilingual classrooms: an experiment in a sports context This paper presents some results of a study carried out within the Multisport project at the University for Foreigners in Siena. The article investigates the peculiarities of multilingual classes in the context of sports in general, and soccer in particular, in order to illustrate the main implications for the teaching of Italian. The results presented are based on a survey that involved 162 informants, including 30 Serie A professionals, 25 asylum-seeking players who play in the amateur league and 107 students from the Liceo Sportivo in Siena. Data was collected through a series of interviews, participant observation and with the use of a sociolinguistic questionnaire. These tools made it possible to analyze the linguistic profiles and needs of the informants. Using the information gathered during the research, the article proposes some classroom and field-based educational activities to motivate student-athletes. From the experiences in the field and in the classroom, among the teaching strategies that can be implemented in sports contexts are paths related to playful, multisensory, modular, action-oriented teaching, in the framework of cooperative learning.
description: Italiano LinguaDue, V. 12 N. 2 (2020)
New insights on the nebular emission, ionizing radiation and low metallicity of Green Peas from advanced modelling
Creators: name: Fernández, Vital
name: Amorín, R.
name: Pérez-Montero, E.
name: Papaderos, P.
name: Kehrig, C.
name: Vílchez, J. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Low-metallicity, compact starburst galaxies referred to as Green Peas (GPs) provide a unique window to study galactic evolution across cosmic epochs. In this work, we present new deep optical spectra for three GPs from OSIRIS at the 10m Gran Telescopio Canarias (GTC), which are studied using a state-of-the-art methodology. A stellar population synthesis is conducted with 1098 spectral templates. The methodology succeeds at characterising stellar populations from 0.5 Myrs to 10 Gyrs. The light distribution shows a large red excess from a single population with $log\left(age\right) > 8.5yr$ in the GP sample analysed. This points towards an incomplete characterisation of the gas luminosity, whose continuum already accounts between $7.4\%$ and $27.6\%$ in the galaxy sample. The emission spectra are fitted with the largest Bayesian chemical model consisting of a electron temperature, a electron density, the logarithmic extinction coefficient and eleven ionic species under the direct method paradigm. Additionally, building on previous work, we propose a neural networks sampler to constrain the effective temperature and ionization parameter of each source from photoionization model grids. Finally, we combine both methodologies into a 16-dimensional model, which for the first time, simultaneously explores the direct method and photoionization parameter spaces. Both techniques consistently indicate a low metallicity gas, $7.76<12+log\left(\frac{O}{H}\right)<8.04$, ionized by strong radiation fields, in agreement with previous works.
description: Accepted for publication in MNRAS on 14th of October 2021
STUDIAMO INSIEME. IL RUOLO DEI MATERIALI OPERATIVI PER STIMOLARE L’INTERAZIONE TRA GENITORI E FIGLI IN CONTESTI DI PLURILINGUISMO
Creators: name: Sordella, Silvia
Publisher: name: Italiano LinguaDue
Year: 2021

description: Coinvolgere i genitori nei percorsi di avvio alle attività di studio dei figli è una sfida impegnativa per gli insegnanti della scuola primaria e la complessità aumenta nel caso delle famiglie plurilingui provenienti da contesti di migrazione. In questi casi, l’incontro con la varietà di lingua italiana propria delle discipline di studio e l’approccio a contenuti di apprendimento che possono essere diversi da quelli affrontati nel Paese di origine possono contribuire ad aumentare la distanza intergenerazionale piuttosto che favorire il parental involvement. Questo contributo illustra alcuni esempi di attività propedeutiche allo studio che coinvolgono un gruppo di alunni di origine straniera e i loro genitori, con la mediazione di borsisti universitari, in conversazioni orientate al completamento di task appositamente progettati nell’ambito della ricerca – azione “Con parole mie”, realizzata in collaborazione tra l’Università di Torino e due scuole primarie del territorio urbano torinese caratterizzate da una forte presenza di popolazione immigrata. Studying together. The role of operational materials to stimulate interaction between parents and children in multilingual contexts Involving parents in their children’s learning is a challenge for elementary school teachers and this complexity increases in the case of multilingual families from migrant backgrounds. In these cases, the encounter with Italian for the study of subjects and the approach to learning content may be different from that in the country of origin, which can contribute to increasing intergenerational distance rather than fostering parental involvement. This article illustrates some examples of preparatory activities for study involving a group of foreign students and their parents, with the mediation of university scholarship holders, oriented towards the completion of tasks specifically designed within the action-research “Con parole mie”, carried out in collaboration between the University of Turin and two elementary school in Turin characterized by a large immigrant population.
description: Italiano LinguaDue, V. 12 N. 2 (2020)