cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
CORPORATE SOCIAL RESPONSIBILITY IN THE RUSSIAN ENERGY INDUSTRY
Creators: name: Benyaminova, Alina
Publisher: name: University of Westminster
Year: 2019

description: CSR has witnessed global resonance (Jamali and Neville 2011), facing different formal and informal institutional environments, which characterise the national identify of each country (Khanna et al. 2006; Hira and Hira 2000). This challenges the understanding of CSR and the validity of the standardised global CSR agenda, as such understanding relies heavily upon the institutional context of the countries (North 1990; Kim et al. 2013). Responding to requests to contextualise CSR research, this study examines the institutional forces affecting CSR in the Russian energy industry by focusing on the changing set of stakeholders as reflected in CSR activities in the Russian energy sector, such as oil, gas, electrical power and coal. This study is a detailed qualitative analysis of CSR in Russia, a country with different value and political systems from the Western countries where CSR was initially developed. I make reference to a number of theories, which include neo-institutional and stakeholder theories, drawing on Scott’s (1995) conceptual model of three institutional pillars, the regulative, the normative and the cultural-cognitive, to examine institutional forces. This study presents empirical findings drawn from 29 semi-structured interviews with representatives of the Russian energy industry. CSR reports and websites are used to strengthen and verify the use of interview data (Fernando 2010). The findings demonstrate that energy companies are subject to various institutional forces. All three pillars, regulative, normative and cultural, serve as a justification for CSR in the given context. CSR reflects complex interaction between national formal and informal institutions, in addition to the interaction between international institutions.
Contribution of Nuclear Excitation Electromagnetic Form Factors in ${\rm ^{12}C}$ and ${\rm ^{16}O}$ to the Coulomb Sum Rule
Creators: name: Bodek, A.
name: Christy, M. E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report on empirical parameterizations of longitudinal and transverse nuclear excitation electromagnetic form factors in ${\rm ^{12}C}$ and ${\rm ^{16}O}$. We extract the contribution of nuclear excitations to the Normalized Inelastic Coulomb Sum Rule (\csr) as a function of momentum transfer $\bf q$ and find that it is significant (0.29$\pm$0.030 at $\bf q$= 0.22 GeV). The total contributions of nuclear excitations to $S_L({\bf q})$ in ${\rm ^{12}C}$ and ${\rm ^{16}O}$ are found to be equal within the uncertainties. Since the cross sections for nuclear excitations are significant, the radiative tails from nuclear excitations should be included in precise calculations of radiative corrections to quasielastic electron scattering at low $\bf q$ and deep-inelastic electron scattering at large energy transfers $ν$. The parameterizations also serve as a benchmark in testing theoretical modeling of cross sections for excitation of nuclear states in electron and neutrino interactions on nuclear targets at low energies.
description: 14 pages, 16 Figures, Submitted to Physical Review C
Formation of the prebiotic molecule NH$_2$CHO on astronomical amorphous solid water surfaces: accurate tunneling rate calculations
Creators: name: Song, Lei
name: Kästner, Johannes
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Investigating how formamide forms in the interstellar medium is a hot topic in astrochemistry, which can contribute to our understanding of the origin of life on Earth. We have constructed a QM/MM model to simulate the hydrogenation of isocyanic acid on amorphous solid water surfaces to form formamide. The binding energy of HNCO on the ASW surface varies significantly between different binding sites, we found values between $\sim$0 and 100 kJ mol$^{-1}$. The barrier for the hydrogenation reaction is almost independent of the binding energy, though. We calculated tunneling rate constants of H + HNCO $\rightarrow$ NH$_2$CO at temperatures down to 103 K combining QM/MM with instanton theory. Tunneling dominates the reaction at such low temperatures. The tunneling reaction is hardly accelerated by the amorphous solid water surface compared to the gas phase for this system, even though the activation energy of the surface reaction is lower than the one of the gas-phase reaction. Both the height and width of the barrier affect the tunneling rate in practice. Strong kinetic isotope effects were observed by comparing to rate constants of D + HNCO $\rightarrow$ NHDCO. At 103 K we found a KIE of 231 on the surface and 146 in the gas phase. Furthermore, we investigated the gas-phase reaction NH$_2$ + H$_2$CO $\rightarrow$ NH$_2$CHO + H and found it unlikely to occur at cryogenic temperatures. The data of our tunneling rate constants are expected to significantly influence astrochemical models.
description: Phys. Chem. Chem. Phys. (2016)
Nuove prospettive per l’Educazione Linguistica: per una nuova interdisciplinarietà
Creators: name: Cardona, Mario
name: Luise, Maria Cecilia
Publisher: name: Studi di glottodidattica
Year: 2022

description: In questo saggio introduttivo, si vuole proporre una serie di spunti di riflessione su alcuni tra i principali aspetti caratterizzanti la glottodidattica, con lo scopo di aprire un confronto tra studiosi sul tema di quali possano essere le possibili evoluzioni e le prospettive future di questa scienza. Dopo una considerazione sulla denominazione della disciplina – da sempre tema di confronto e discussione – si propongono alcune riflessioni sul carattere interdisciplinare e teorico-pratico che da sempre caratterizza la glottodidattica e sui metodi della ricerca adatti ai suoi scopi. Sono temi che vengono poi approfonditi e contestualizzati nei saggi dei colleghi e delle colleghe pubblicati in questo numero monografico.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
title: The problematical nature of mixed jurisdictions: the Algerian approach
Creators: name: Aoued, Ahmed
Publisher: name: University of Glasgow
Year: 1980
Subjects: subject: Mixed jurisdictions, law, Algeria.

description: The present study is a survey of a quite restricted number of particular systems called 'Mixed Jurisdictions'. The study opens with a first part which gives an overview of the particularities of the laws in these mixed systems by retracing the origins of their 'mixture', their essential characteristics and finally by selecting and inquiring into some of their problematical aspects. Occasionally, a topic considered in the law of one system is elaborated upon more than in that of another system. This is done deliberately to bring out some relevant details which may be of some (theoretical or academic) interest; and also to avoid an exclusive reference to one particular mixed system. As may be noticed, this first part is essentially a work of synthesis, a macro-comparison which will provide the comparative data for the second part. The second part is, however, a work of research in the scientific sense of the term. It proceeds to describe the legal system of Algeria on the basis of the 'STILLEHERE' or doctrine of style outlined by the German comparatist Zweigert some years ago. The account given of the development and ethos of Algerian law is amplified and exemplified (as proposed by Zweigert) by a study of some legal institutions typical of the Algerian legal style. Different topics are treated in this part to allow for a reappraisal of the law of Algeria with, however, more emphasis on her private law; an area upon which by tradition comparatists generally concentrate their researches. The link between the two parts is indeed a 'big jump', but not an impossible one. While the first part presents a certain type of mixed jurisdiction, the second, taking the law of Algeria as a model, tries to demonstrate the existence of a new and totally different type of mixed system; a trend of a sort which seems continuously increasing amongst some contemporary legal systems. And finally, the purpose pursued through this study in its ensemble is to ascertain, as far as possible, the extent to which these mixed jurisdictions - whether 'traditional' or 'new', work adequately; that is to say avoid any specific problem(s) which may, as a result of the mixed nature of the systems, adversely affect their legislative, jurisdictional or institutional functioning.
Snell's Law for Spin Waves
Creators: name: Stigloher, Johannes
name: Decker, Martin
name: Körner, Helmut S.
name: Tanabe, Kenji
name: Moriyama, Takahiro
name: Taniguchi, Takuya
name: Hata, Hiroshi
name: Madami, Marco
name: Gubbiotti, Gianluca
name: Kobayashi, Kensuke
name: Ono, Teruo
name: Back, Christian H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the experimental observation of Snell's law for magneto-static spin waves in thin ferromagnetic Permalloy films by imaging incident, refracted and reflected waves. We use a thickness step as the interface between two media with different dispersion relation. Since the dispersion relation for magneto-static waves in thin ferromagnetic films is anisotropic, deviations from the isotropic Snell's law known in optics are observed for incidence angles larger than 25\textdegree{} with respect to the interface normal between the two magnetic media. Furthermore, we can show that the thickness step modifies the wavelength and the amplitude of the incident waves. Our findings open up a new way of spin wave steering for magnonic applications.
Quale (e quanta) cultura? Riflessioni sull’educazione linguistica interculturale
Creators: name: Borghetti, Claudia
Publisher: name: Studi di glottodidattica
Year: 2022
Subjects: Educazione linguistica interculturale; competenza interculturale; paradigma culturalista; approccio non essenzialista.

description: The article offers some reflections on the so-called ‘intercultural perspective to the teaching of modern languages’ or ‘intercultural linguistic education’. It focuses in particular on a relatively recent development of the discipline, linked to the attempt to adopt a non-essentialist definition of ‘culture’ in glottodidactics. Unlike the well-known culturalist paradigm, the non-essentialist one challenges the idea that it is appropriate to set up the development of intercultural competence by leveraging only the international dimension of diversity. Non-essentialist principles are currently on the margins of intercultural linguistic education; but they are an opportunity to question some of the assumptions on which much of the theoretical reflection and didactic practice dedicated to the intercultural aims of learning and teaching languages are based.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
Decoherence and the ultraviolet cutoff: non-Markovian dynamics of a charged particle in a magnetic field
Creators: name: Bhattacharjee, Suraka
name: Mandal, Koushik
name: Sinha, Supurna
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We derive a non-Markovian master equation for a charged particle in a magnetic field coupled to a bath and study decoherence by analysing the temporal decay of the off-diagonal elements of the reduced density matrix in the position basis. The coherent oscillations characterised by the cyclotron frequency get suppressed as a result of decoherence due to coupling with the environment. We consider an Ohmic bath with three distinct models for the high-frequency cutoff for the spectral density of the bath and compare the three cases. As expected, the three cutoff models converge in the limit of the uppermost frequency of the bath tending to infinity. We notice a dramatic slowing down of loss of coherence in the low-temperature limit dominated by zero point quantum fluctuations compared to the high-temperature classical limit dominated by thermal fluctuations. We also go beyond the Ohmic model and study super-Ohmic and sub-Ohmic baths with the spectral densities deviating from a linear dependence on the frequency. Our results are testable in a state of the art cold atom laboratory.
description: 21 pages, 4 figures
Orthogonality Catastrophes in Quantum Electrodynamics
Creators: name: Merlin, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The insertion of a small polarizable particle in an arbitrarily large optical cavity significantly alters the quantum-mechanical state of the electromagnetic field in that the photon ground state of the empty cavity and that of the cavity with the particle become mutually orthogonal and, thus, cannot be connected adiabatically in the infinite limit. The photon problem can be mapped exactly onto that of a many-body system of fermions, which is known to exhibit an orthogonality catastrophe when a finite-range local potential is introduced. We predict that the motion of polarizable objects inside a cavity, no matter how slow, as well as their addition and removal from the cavity, will generate a macroscopic, diverging number of low-energy photons. The significance of these results in regard to the quantum measurement problem and the dynamical Casimir effect are also discussed.
Educazione linguistica, genere e migrazione: il contributo degli studi di genere alla ricerca in didattica delle lingue seconde
Creators: name: Cognigni, Edith
Publisher: name: Studi di glottodidattica
Year: 2022
Subjects: gender studies; migration; multiculturalism; Italian L2

description: By analysing some studies and researches related to the field of gender studies, the paper proposes a reflection on the relationship between gender and language education, with particular reference to the learning and teaching of a second language in a migratory context. The main research trends and some key concepts developed within the feminist and critical approaches to language learning and teaching will be examined, highlighting their possible contributions to the Italian research in the field of language education. Drawing inspiration from a research experience on teaching Italian L2 to migrant women, some critical issues and research perspectives concerning the teaching of second languages will be discussed, underlining the specific contribution that a gender perspective can provide in interpreting sociolinguistic dynamics and learning processes in migratory contexts.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
Linguistica Educativa e didattica inclusiva: presupposti per un dialogo interdisciplinare
Creators: name: Daloiso, Michele
Publisher: name: Studi di glottodidattica
Year: 2022
Subjects: Linguistica educativa; inclusione; Bisogni Educativi Speciali; interdisciplinarietà

description: Educational Linguistics has been defined as an interdisciplinary research domain which explores a broad range of issues related to language (in) education. As such, Educational Linguistics is supposed to investigate each research topic by integrating tools and concepts from other relevant domains, as well as offering its own specific contribution to research areas that are intrinsically interdisciplinary. Inclusive education is certainly one of them, since it is explored from different theoretical perspectives (pedagogical, psychological, social, clinical etc.). The present paper discusses the original contribution that Education Linguistics can offer to the study of inclusive education and highlights some potential issues arising in the interdisciplinary dialogue with other scientific fields.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
Integrated Filters and Couplers for Next Generation Wireless Tranceivers
Creators: name: Olukoya, Oludotun
Publisher: name: University of Westminster
Year: 2019

description: The main focus of this thesis is to investigate the critical nonlinear distortion issues affecting RF/Microwave components such as power amplifiers (PA) and develop new and improved solutions that will improve efficiency and linearity of next generation RF/Microwave mobile wireless communication systems. This research involves evaluating the nonlinear distortions in PA for different analog and digital signals which have been a major concern. The second harmonic injection technique is explored and used to effectively suppress nonlinear distortions. This method consists of simultaneously feeding back the second harmonics at the output of the power amplifier (PA) into the input of the PA. Simulated and measured results show improved linearity results. However, for increasing frequency bandwidth, the suppression abilities reduced which is a limitation for 4G LTE and 5G networks that require larger bandwidth (above 5 MHz). This thesis explores creative ways to deal with this major drawback. The injection technique was modified with the aid of a well-designed band-stop filter. The compact narrowband notch filter designed was able to suppress nonlinear distortions very effectively when used before the PA. The notch filter is also integrated in the injection technique for LTE carrier aggregation (CA) with multiple carriers and significant improvement in nonlinear distortion performance was observed. This thesis also considers maximizing efficiency alongside with improved linearity performance. To improve on the efficiency performance of the PA, the balanced PA configuration was investigated. However, another major challenge was that the couplers used in this configuration are very large in size at the desired operating frequency. In this thesis, this problem was solved by designing a compact branch line coupler. The novel coupler was simulated, fabricated and measured with performance comparable to its conventional equivalent and the coupler achieved substantial size reduction over others. The coupler is implemented in the balanced PA configuration giving improved input and output matching abilities. The proposed balanced PA is also implemented in 4G LTE and 5G wireless transmitters. This thesis provides simulation and measured results for all balanced PA cases with substantial efficiency and linearity improvements observed even for higher bandwidths (above 5 MHz). Additionally, the coupler is successfully integrated with rectifiers for improved energy harvesting performance and gave improved RF-dc conversion efficiency
Imaging faint sources with the extended solar gravitational lens
Creators: name: Turyshev, Slava G.
name: Toth, Viktor T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider resolved imaging of faint sources with the solar gravitational lens (SGL) while treating the Sun as an extended gravitating body. We use our new diffraction integral that describes how a spherical electromagnetic wave is modified by the static gravitational field of an extended body, represented by series of multipole moments characterizing its interior mass distribution. Dominated by the solar quadrupole moment, these deviations from spherical symmetry significantly perturb the image that is projected by the Sun into its focal region, especially at solar equatorial latitudes. To study the optical properties of the quadrupole SGL, we develop an approximate solution for the point spread function of such an extended lens. We also derive semi-analytical expressions to estimate signal levels from extended targets. With these tools, we study the impact of solar oblateness on imaging with the SGL. Given the small value of the solar quadrupole moment, the majority of the signal photons arriving from an extended target still appear within the image area projected by the monopole lens. However, these photons are scrambled, thus reducing the achievable signal-to-noise ratio during image recovery process (i.e., deconvolution). We also evaluate the spectral sensitivity for high-resolution remote sensing of exoplanets with the extended SGL. We assess the impact on image quality and demonstrate that despite the adverse effects of the quadrupole moment, the SGL remains uniquely capable of delivering high-resolution imaging and spectroscopy of faint, small and distant targets, notably terrestrial exoplanets within ~30--100 parsec from us.
description: 23 pages, 2 figures
Fare pragmatica alla scuola primaria. Tra teoria e pratica didattica
Creators: name: Ferrari, Stefania
Publisher: name: Studi di glottodidattica
Year: 2022
Subjects: Italiano L1 e L2; pragmatica; scuola primaria

description: Both first and second language acquisition research and language education invite teachers to integrate grammar and pragmatics into the curriculum. A wider attention towards spoken language use in situational contexts close to children experience can potentially facilitate the development of inclusive teaching practices. However, such a challenge requires a strict collaboration between research and classroom practice, in order to develop teacher training programs and teaching resources for multicultural primary school classrooms. The present work, after presenting a review of present literature on learning and teaching pragmatics in L1 and L2, discusses the teacher training and action-research project Oggi facciamo pragmatica dedicated to the Italian pragmatics in primary schools and illustrates the first results from a serie of exploratory studies.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
Interpretation of the historic Yemeni reports of supernova SN 1006: early discovery in mid-April 1006 ?
Creators: name: Neuhaeuser, Ralph
name: Neuhaeuser, Dagmar
name: Rada, Wafiq
name: Chapman, Jesse
name: Luge, Daniela
name: Kunitzsch, Paul
Publisher: name: arXiv
Year: 2016
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The recently published Yemeni observing report about SN 1006 from al-Yamani clearly gives AD 1006 Apr $17 \pm 2$ (mid-Rajab 396h) as first observation date. Since this is about 1.5 weeks earlier than the otherwise earliest reports (Apr 28 or 30) as discussed so far, we were motivated to investigate an early sighting in more depth. We searched for additional evidences from other areas like East Asia and Europe. We found that the date given by al-Yamani is fully consistent with other evidence, including: (a) SN 1006 "rose several times half an hour after sunset" (al-Yamani), which is correct for the location of Sana in Yemen for the time around Apr 17, but it would not be correct for late Apr or early May; (b) the date (3rd year, 3rd lunar month, 28th day wuzi, Ichidai Yoki) for an observation of a guest star in Japan is inconsistent (there is no day wuzi in that lunar month), but may be dated to Apr 16 by reading wuwu date rather than a wuzi date; (c) there is observational evidence that SN 1006 was observed in East Asia early or mid April; for the second half of April, a bad weather (early monsoon) period is not unlikely -- there is a lack of night reports; (d) the observer in St. Gallen reported to have seen SN 1006 "for three months", which must have ended at the very latest on AD 1006 Jul 10, given his northern location, so that his observations probably started in April. We conclude that the correctly reported details give quite high confidence in the fully self-consistent report of al-Yamani, so that the early discovery date should be considered seriously.
description: 11 pages, 2 figures, 1 table (in press) in Astronomical Notes 2016
La grammatica valenziale per la didattica dell’italiano L2. Un’indagine sperimentale
Creators: name: Gilardoni, Silvia
Publisher: name: Studi di glottodidattica
Year: 2022
Subjects: Valency grammar ; Italian as a second language teaching ; Italian L2 grammar teaching and learning

description: This paper aims at analysing the use of valency grammar for the teaching of Italian as a second language. After considering the pedagogical implications of Tesnière’s theory of valency grammar and its relevance in the history of language teaching, we illustrate the valency model proposed by Sabatini for the Italian language. The focus then turns to the advantages and applications of this model for the teaching of Italian as a second language, with examples of teaching activities which can be adapted to different types of learners. The paper thus presents the results of an empirical research conducted in the context of the Italian L2 teaching to university students, carried out with the aim of analysing the learning and teaching effectiveness of valency grammar.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
Parallelized computational 3D video microscopy of freely moving organisms at multiple gigapixels per second
Creators: name: Zhou, Kevin C.
name: Harfouche, Mark
name: Cooke, Colin L.
name: Park, Jaehee
name: Konda, Pavan C.
name: Kreiss, Lucas
name: Kim, Kanghyun
name: Jönsson, Joakim
name: Doman, Jed
name: Reamey, Paul
name: Saliu, Veton
name: Cook, Clare B.
name: Zheng, Maxwell
name: Bechtel, Jack P.
name: Bègue, Aurélien
name: McCarroll, Matthew
name: Bagwell, Jennifer
name: Horstmeyer, Gregor
name: Bagnat, Michel
name: Horstmeyer, Roarke
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Image and Video Processing (eess.IV)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: To study the behavior of freely moving model organisms such as zebrafish (Danio rerio) and fruit flies (Drosophila) across multiple spatial scales, it would be ideal to use a light microscope that can resolve 3D information over a wide field of view (FOV) at high speed and high spatial resolution. However, it is challenging to design an optical instrument to achieve all of these properties simultaneously. Existing techniques for large-FOV microscopic imaging and for 3D image measurement typically require many sequential image snapshots, thus compromising speed and throughput. Here, we present 3D-RAPID, a computational microscope based on a synchronized array of 54 cameras that can capture high-speed 3D topographic videos over a 135-cm^2 area, achieving up to 230 frames per second at throughputs exceeding 5 gigapixels (GPs) per second. 3D-RAPID features a 3D reconstruction algorithm that, for each synchronized temporal snapshot, simultaneously fuses all 54 images seamlessly into a globally-consistent composite that includes a coregistered 3D height map. The self-supervised 3D reconstruction algorithm itself trains a spatiotemporally-compressed convolutional neural network (CNN) that maps raw photometric images to 3D topography, using stereo overlap redundancy and ray-propagation physics as the only supervision mechanism. As a result, our end-to-end 3D reconstruction algorithm is robust to generalization errors and scales to arbitrarily long videos from arbitrarily sized camera arrays. The scalable hardware and software design of 3D-RAPID addresses a longstanding problem in the field of behavioral imaging, enabling parallelized 3D observation of large collections of freely moving organisms at high spatiotemporal throughputs, which we demonstrate in ants (Pogonomyrmex barbatus), fruit flies, and zebrafish larvae.
Scienze pedagogiche e didattica delle lingue online: lineamenti di un rapporto complesso
Creators: name: La Grassa, Matteo
Publisher: name: Studi di glottodidattica
Year: 2022
Subjects: Online language education; Digital environment; Digital Technologies; Learning Theories

description: The article focuses on the relationship between online language teaching and Educational Sciences. Starting from the identification of the themes that the main learning theories have suggested to Language Education, the article reflects on the appropriateness of fully adopting these principles also in online language teaching. On the basis of the data gathered from some experiences carried out in different contexts, the article suggests some general indications for a virtuous relationship between language teaching and Educational Sciences.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
Neon and [CII] 158 micron Emission Line Profiles in Dusty Starbursts and Active Galactic Nuclei
Creators: name: Samsonyan, Anahit
name: Weedman, Daniel
name: Lebouteiller, Vianney
name: Barry, Donald
name: Sargsyan, Lusine
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The sample of 379 extragalactic sources is presented that have mid-infrared, high resolution spectroscopy with the Spitzer Infrared Spectrograph (IRS) and also spectroscopy of the [CII] 158 um line with the Herschel Photodetector Array Camera and Spectrometer (PACS). The emission line profiles of [NeII] 12.81 um, [NeIII] 15.55 um, and [CII] 158 um are presented, and intrinsic line widths are determined (full width half maximum of Gaussian profiles after instrumental correction). All line profiles together with overlays comparing positions of PACS and IRS observations are made available in the Cornell Atlas of Spitzer IRS Sources (CASSIS). Sources are classified from AGN to starburst based on equivalent widths of the 6.2 um polycyclic aromatic hydrocarbon feature. It is found that intrinsic line widths do not change among classification for [CII], with median widths of 207 km per s for AGN, 248 km per s for composites, and 233 km per s for starbursts. The [NeII] line widths also do not change with classification, but [NeIII] lines are progressively broader from starburst to AGN. A small number of objects with unusually broad lines or unusual redshift differences in any feature are identified.
description: Accepted for publication in The Astrophysical Journal Supplement
La motivazione all'apprendimento dell’italiano L2 nella prospettiva della teoria dei sistemi dinamici complessi
Creators: name: Martari, Yahis
Publisher: name: Studi di glottodidattica
Year: 2022
Subjects: Motivazione; Italiano L2; Teoria della complessità

description: Many studies suggest that the motivation - as well as the other constitutive factors of language acquisition and teaching - can be interpreted within the epistemological framework of complexity theory (TC) (Hiver and Papi 2019; Dörnyei et all.2015; Ortega and Han 2017; Larsen-Freeman 1997, 2006; Martari 2021). In the first part of this paper, we describe the motivation in second language acquisition as a dynamic model. Secondly, we briefly observe some key elements of CT in relation to applied linguistics and educational linguistics. In the third part, we analyze a case study evaluating the learning experience of Italian as a second language described by seven adult learners during structured interviews. Unlike other research on this topic, the aim of this study is to reflect on the complex dimension of motivational processes in relation to the following elements of CT: a) the ecosystemic and dynamic vision of motivation to learn; b) the complex relation of self-similarity and the feedback loops; c) the emergence of the motivation to learn from the interaction between different levels of linguistic and social perception of self. Through the analysis of the interviews we observe how language learning is constantly set in an ecological framework in which learning and acquisition are in relation with the communicative (cultural, social and affective) ecosystem of the human subject.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
Computational budget optimization for Bayesian parameter estimation in heavy ion collisions
Creators: name: Weiss, Brandon
name: Paquet, Jean-François
name: Bass, Steffen A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Bayesian parameter estimation provides a systematic approach to compare heavy ion collision models with measurements, leading to constraints on the properties of nuclear matter with proper accounting of experimental and theoretical uncertainties. Aside from statistical and systematic model uncertainties, interpolation uncertainties can also play a role in Bayesian inference, if the model's predictions can only be calculated at a limited set of model parameters. This uncertainty originates from using an emulator to interpolate the model's prediction across a continuous space of parameters. In this work, we study the trade-offs between the emulator (interpolation) and statistical uncertainties. We perform the analysis using spatial eccentricities from the T$_\mathrm{R}$ENTo model of initial conditions for nuclear collisions. Given a fixed computational budget, we study the optimal compromise between the number of parameter samples and the number of collisions simulated per parameter sample. For the observables and parameters used in the present study, we find that the best constraints are achieved when the number of parameter samples is slightly smaller than the number of collisions simulated per parameter sample.
description: 11 pages, 7 figures
I Mixed methods della ricerca in Linguistica educativa
Creators: name: Maugeri, Giuseppe
Publisher: name: Studi di glottodidattica
Year: 2022
Subjects: Ricerca qualitativa e quantitativa; Mixed methods; design dei Mixed methods

description: This study aims to investigate the effectiveness of Mixed Methods Approach in a field such as Educational Linguistics. Therefore we start from the current conceptual framework of Mixed Methods to highlight the research advantages to set up an educational action - research project with an appropriate mixed method design that combines qualitative and quantitative data in order to have a better understanding of research problems and complex phenomena.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
Quantum criticality of a $\mathbb{Z}_{3}$ symmetric spin chain with long-range interactions
Creators: name: Yu, Xue-Jia
name: Ding, Chengxiang
name: Xu, Limei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Based on large-scale density matrix renormalization group techniques, we investigate the critical behaviors of quantum three-state Potts chains with long-range interactions. Using fidelity susceptibility as an indicator, we obtain a complete phase diagram of the system. The results show that as the long-range interaction power $α$ increases, the critical points $f_{c}^{*}$ shift towards lower values. In addition, the critical threshold $α_{c}(\approx 1.43$) of the long-range interaction power is obtained for the first time by a non-perturbative numerical method. This indicates that the critical behavior of the system can be naturally divided into two distinct universality classes, namely the long-range ($α\textless α_c$) and short-range ($α\textgreater α_c$) universality classes, qualitatively consistent with the classical $ϕ^{3}$ effective field theory. This work provides a useful reference for further research on phase transitions in quantum spin chains with long-range interaction.
description: 5+7 pages. Any comments or suggestions are welcome !
Blowup solutions for a nonlinear heat equation involving a critical power nonlinear gradient term
Creators: name: Ghoul, Tej-Eddine
name: Nguyen, Van Tien
name: Zaag, Hatem
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider the following exponential reaction-diffusion equation involving a nonlinear gradient term: $$\partial_t U = ΔU + α|\nabla U|^2 + e^U,\quad (x, t)\in\mathbb{R}^N\times[0,T), \quad α> -1.$$ We construct for this equation a solution which blows up in finite time $T > 0$ and satisfies some prescribed asymptotic behavior. We also show that the constructed solution and its gradient blow up in finite time $T$ simultaneously at the origin, and find precisely a description of its final blowup profile. It happens that the quadratic gradient term is critical in some senses, resulting in the change of the final blowup profile in comparison with the case $α= 0$. The proof of the construction inspired by the method of Merle and Zaag in 1997, relies on the reduction of the problem to a finite dimensional one, and uses the index theory to conclude. One of the major difficulties arising in the proof is that outside the \textit{blowup region}, the spectrum of the linearized operator around the profile can never be made negative. Truly new ideas are needed to achieve the control of the outer part of the solution. Thanks to a geometrical interpretation of the parameters of the finite dimensional problem in terms of the blowup time and the blowup point, we obtain the stability of the constructed solution with respect to perturbations of the initial data.
description: 39 pages
A Cognitive Architecture for the Implementation of Emotions in Computing Systems
Creators: name: Vallverdú, Jordi
name: Talanov, Max
name: Distefano, Salvatore
name: Mazzara, Manuel
name: Tchitchigin, Alexander
name: Nurgaliev, Ildar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper we present a new neurobiologically-inspired affective cognitive architecture: NEUCOGAR (NEUromodulating COGnitive ARchitecture). The objective of NEUCOGAR is the identification of a mapping from the influence of serotonin, dopamine and noradrenaline to the computing processes based on Von Neuman's architecture, in order to implement affective phenomena which can operate on the Turing's machine model. As basis of the modeling we use and extend the Lövheim Cube of Emotion with parameters of the Von Neumann architecture. Validation is conducted via simulation on a computing system of dopamine neuromodulation and its effects on the Cortex. In the experimental phase of the project, the increase of computing power and storage redistribution due to emotion stimulus modulated by the dopamine system, confirmed the soundness of the model.
The Integrated Bispectrum in Modified Gravity Theories
Creators: name: Munshi, Dipak
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Gravity-induced non-Gaussianity can provide important clues to Modified Gravity (MG) Theories. Several recent studies have suggested using the {\it Integrated Bispectrum} (IB) as a probe for squeezed configuration of bispectrum. Extending previous studies on the IB, we include redshift-space distortions to study a class of (parametrised) MG theories that include the string-inspired Dvali, Gabadadze \& Porrati (DGP) model. Various contributions from redshift-space distortions are derived in a transparent manner, and squeezed contributions from these terms are derived separately. Results are obtained using the Zel'dovich Approximation (ZA). Results are also presented for projected surveys (2D). We use the Press-Schechter (PS) and Sheth-Torman (ST) mass functions to compute the IB for collapsed objects that can readily be extended to peak-theory based approaches. The {\em cumulant correlators} (CCs) generalise the ordinary {\em cumulants} and are known to probe collapsed configurations of higher order correlation functions. We generalise the concept of CCs to halos of different masses. We also introduce a generating function based approach to analyse more general non-local biasing models. The Fourier representations of the CCs, the skew-spectrum, or the kurt-spctra are discussed in this context. The results are relevant for the study of the Minkowski Functionals (MF) of collapsed tracers in redshift-space.} \keywords {Cosmology, Large Scale Structure, Modified Theories of Gravity
description: 26 pages, 6 figures
Light cone in the two-dimensional transverse-field Ising model in time-dependent mean-field theory
Creators: name: Hafner, Jonas
name: Blaß, Benjamin
name: Rieger, Heiko
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the propagation of a local perturbation in the two-dimensional transverse-field Ising model with a time-dependent application of mean-field theory based on the BBGKY hierarchy. We show that the perturbation propagates through the system with a finite velocity and that there is transition from Manhattan to Euclidian metric, resulting in a light cone with an almost circular shape at sufficiently large distances. The propagation velocity of the perturbation defining the front of the light cone is discussed with respect to the parameters of the Hamiltonian and compared to exact results for the transverse-field Ising model in one dimension.
description: 6 pages, 4 figures
Il concetto di benessere nell’insegnamento delle lingue: nuove linee di ricerca
Creators: name: Menegale, Marcella
Publisher: name: Studi di glottodidattica
Year: 2022
Subjects: Benessere; emozioni; insegnamento linguistico; psicologia positiva

description: In view of the recent transformations occurred in language learning environments, much interest has raised on positive psychology and issues connected to the well-being of learners and teachers. Acknowledging that teacher well-being needs to be taken into great consideration as students’ learning achievements largely depend on it, in this article we will try to reflect on what this concept implies, especially in relation to the field of educational linguistics. By drawing on the literature on well-being in language teaching, we will try to present some of the new lines of research opened by the latest changes in language learning environments, which seem to be urgently in need of further investigation.
description: Studi di glottodidattica, V. 7, N. 2 (2022): Special Issue
Validation of non-equilibrium kinetics in CO2-N2 plasmas
Creators: name: Fromentin, C.
name: Silva, T.
name: Dias, T. C.
name: Baratte, E.
name: Guaitella, O.
name: Guerra, V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: This work explores the effect of N2 addition on CO2 dissociation and on the vibrational kinetics of CO2 and CO under various non-equilibrium plasma conditions. A self-consistent kinetic model, previously validated for pure CO2 and CO2-O2 discharges, is further extended by adding the kinetics of N2. The vibrational kinetics considered include levels up to v = 10 for CO, v = 59 for N2 and up to v1 = 2 and v2 = v3 = 5, respectively for the symmetric stretch, bending and asymmetric stretch modes of CO2, and account for electron-impact excitation and de-excitation (e-V), vibration-to-translation (V-T) and vibration-to-vibration energy exchange (V-V) processes. The kinetic scheme is validated by comparing the model predictions with recent experimental data measured in a DC glow discharge operating in pure CO2 and in CO2-N2 mixtures, at pressures in the range 0.6 - 4 Torr (80.00 - 533.33 Pa) and a current of 50 mA. The experimental results show a higher vibrational temperature of the different modes of CO2 and CO and an increased dissociation fraction of CO2, that can reach values as high as 70%, when N2 is added to the plasma. On the one hand, the simulations suggest that the former effect is the result of the CO2-N2 and CO-N2 V-V transfers and the reduction of quenching due to the decrease of atomic oxygen concentration; on the other hand, the dilution of CO2 and dissociation products, CO and O2, reduces the importance of back reactions and contributes to the higher CO2 dissociation fraction with increased N2 content in the mixture, while the N2(B3Pg) electronically excited state further enhances the CO2 dissociation.
MApping the Most Massive Overdensities (MAMMOTH) II -- Discovery of an Extremely Massive Overdensity BOSS1441 at $z=2.32$
Creators: name: Cai, Zheng
name: Fan, Xiaohui
name: Bian, Fuyan
name: Zabludoff, Ann
name: Yang, Yujin
name: Prochaska, J. Xavier
name: McGreer, Ian
name: Zheng, Zhen-Ya
name: Kashikawa, Nobunari
name: Wang, Ran
name: Frye, Brenda
name: Green, Richard
name: Jiang, Linhua
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cosmological simulations suggest a strong correlation between high optical-depth Ly$α$ absorbers, which arise from the intergalactic medium (IGM), and 3-D mass overdensities on scales of $10-30$ $h^{-1}$ comoving Mpc. By examining the absorption spectra of $\sim$ 80,000 QSO sight-lines over a volume of 0.1 Gpc$^3$ in the Sloan Digital Sky Survey III (SDSS-III), we have identified an extreme overdensity, BOSS1441, which contains a rare group of strong Ly$α$ absorbers at $z=2.32\pm 0.02$. This absorber group is associated with six QSOs at the same redshift on a 30 comoving Mpc scale. Using Mayall/MOSAIC narrowband and broadband imaging, we detect Ly$α$ emitters (LAEs) down to $0.7\times L_{\rm{Lyα}}^*$, and reveal a large-scale structure of Ly$α$ emitters (LAEs) in this field. Our follow-up Large Binocular Telescope (LBT) observations have spectroscopically confirmed 19 galaxies in the density peak. We show that BOSS1441 has an LAE overdensity of $10.8\pm 2.6$ on a 15 comoving Mpc scale which could collapse to a massive cluster with $M\gtrsim10^{15}$ M$_\odot$ at $z\sim0$. This overdensity is among the most massive large-scale structures at $z\sim2$ discovered to date.
description: 12 pages, 8 figures. submitted to ApJ, Comments are welcome
Constructing Narcoterrorism as Danger: Afghanistan and the Politics of Security and Representation
Creators: name: Aasen, Donald
Publisher: name: University of Westminster
Year: 2019

description: Afghanistan has become a country synonymous with danger. Discourses of narcotics, terrorism, and narcoterrorism have come to define the country and the current conflict. However, despite the prevalence of these dangers globally, they are seldom treated as political representations. This project theorizes danger as a political representation by deconstructing and problematizing contemporary discourses of (narco)terrorism in Afghanistan. Despite the globalisation of these two discourses of danger, (narco)terrorism remains largely under-theorised, with the focus placed on how to overcome this problem rather than critically analysing it as a representation. The argument being made here is that (narco)terrorism is not some ‘new’ existential danger, but rather reflects the hegemonic and counterhegemonic use of danger to establish authority over the collective identity. Using the case study of Afghanistan, this project critically analyses representations of danger emerging from the Afghan government and the Taliban. While many studies have looked at terrorism and narcotics as security concerns, there has not been a critical analysis of these two dangers as a political representation in the Afghan context. Therefore, this study will be of great benefit to scholars and practitioners of security as it presents a unique look on how identity is shaped through representations of danger in Afghanistan. Through applying Critical Discourse Analysis to contemporary representations in Afghanistan, this study provides new insight into the aims and objectives of both the Government of the Islamic Republic of Afghanistan and the Taliban.