cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Playing with Casimir in the vacuum sandbox
Creators: name: Kauffman, S.
name: Succi, S.
name: Tiribocchi, A.
name: Tello, P. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Casimir effect continues to be a subject of discussion regarding its relationship, or the lack of it, with the vacuum energy of fluctuating quantum fields. In this note, we propose a Gedankenexperiment considering an imaginary process similar to a vacuum fluctuation in a typical static Casimir set up. The thought experiment leads to intriguing conclusions regarding the minimum distance between the plates when approaching the Planck scale. More specifically, it is found that distance between the plates cannot reach a value below $(L/L_P)^{2/3}$ Planck lengths, being $L_P$ the Planck length and $L$ the typical lateral extension of the plates. Additional findings allow the conclusion that the approach between the two plates towards this minimum separation distance is asymptotic.
Ferromagnetism and Superconductivity in Carbon-Based Systems
Creators: name: Kopelevich, Y.
name: Esquinazi, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In this article we shortly review previous and recently published experimental results that provide evidence for intrinsic, magnetic-impurity-free ferromagnetism and for high-temperature superconductivity in carbon-based materials. The available data suggest that the origin of those phenomena is related to structural disorder and the presence of light elements like hydrogen, oxygen and/or sulfur.
description: 11 pages, one figure. To be published in J. Low Temp. Physics
A new view on relativity: Part 1. Kinematic relations between inertial and relativistically accelerated systems based on symmetry
Creators: name: Friedman, Yaakov
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Several new ideas related to Special and General Relativity are proposed. The black-box method is used for the synchronization of the clocks and the space axes between two inertial systems or two accelerated systems and for the derivation of the transformations between them. There are two consistent ways of defining the inputs and outputs to describe the transformations and relative motion between the systems. The standard approach uses a mixture of the two ways. By formulating the principle of special and general relativity as a symmetry principle we are able to specify these transformations to depend only on a constant. The transformations become Galilean if the constant is zero. Validity of the Clock Hypothesis for uniformly accelerated systems implies zero constant. If the constant is not zero, we can introduce a metric under which the transformations become self adjoint. In case of inertial systems, the metric is the Minkowski metric and we obtain a unique invariant maximal velocity. The ball of the relativistically admissible velocities is a bounded symmetric domain under projective maps. For uniformly accelerated systems the existence of an invariant \textit{maximal acceleration} is predicted. This is the only method of describing transformations between uniformly accelerated systems without assuming the Clock Hypothesis.
description: 27 pages, 8 figures
Falling Bodies: the Obvious,the Subtle, and the Wrong
Creators: name: Rabinowitz, Mario
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Physics (physics.gen-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: An important scientific debate took place regarding falling bodies hundreds of years ago, and it still warrants introspection. Galileo argued that in a vacuum all bodies fall at the same rate relative to the earth, independent of their mass. Aristotle seemed to consider all media to be viscous, and argued that heavier bodies fall faster. Aristotle was challenged by Philoponus, who argued that light and heavy weights fall about equally fast in air, eleven hundred years before Galileo. As we shall see, the problem is more subtle than meets the eye -- even in a frictionless medium. Philoponus and Galileo are right part of the time, and Aristotle is partly right some of the time. In fact they are all wrong the rest of the time, with the lightest body falling fastest when two bodies fall toward the earth. In principle the results of a free fall experiment depend on whether falling masses originate on earth, are extraterrestrial, are sequential or concurrent, or are simultaneous for coincident or separated bodies, etc. When single falling bodies originate from the earth, all bodies (light and heavy) fall at the same rate relative to the earth in agreement with Galileo's view. Einstein's General Relativity (EGR), in which gravity is due to space-time curvature, was motivated by the Galilean notion that free-fall is independent of the mass and properties of a falling body, and is just due to the properties of the milieu it finds itself in. Quantum mechanics is found to violate the Equivalence Principle of EGR.
description: In the 3-body rectilinear problem, an interesting comparison is made between a purely center of mass consideration without introducing an attraction force, and analysis of this problem using the gravitational force
Investigating the nature of MGRO J1908+06 with multiwavelength observations
Creators: name: Li, Jian
name: Liu, Ruo-Yu
name: Wilhelmi, Emma de Ona
name: Torres, Diego F.
name: Liu, Qian-Cheng
name: Kerr, Matthew
name: Buehler, Rolf
name: Su, Yang
name: He, Hao-Ning
name: Xiao, Meng-Yuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The unidentified TeV source MGRO J1908+06, with emission extending from hundreds of GeV to beyond 100TeV, is one of the most intriguing sources in the Galactic plane. MGRO J1908+06 spatially associates with an IceCube hotspot of neutrino emission. Although the hotspot is not significant yet, this suggests a possible hadronic origin of the observed gamma-ray radiation. Here we describe a multiwavelength analysis on MGRO J1908+06 to determine its nature. We identify, for the first time, an extended GeV source as the counterpart of MGRO J1908+06, discovering possibly associated molecular clouds (MCs). The GeV spectrum shows two well-differentiated components: a soft spectral component below $\sim10$ GeV, and a hard one ($Γ\sim1.6$) above these energies. The lower-energy part is likely associated with the dense MCs surrounding the supernova remnant SNR G40.5$-$0.5, whereas the higher-energy component, which connects smoothly with the spectrum observed in TeV range, resembles the inverse Compton emission observed in relic pulsar wind nebulae. This simple scenario seems to describe the data satisfactorily, but raises questions about the interpretation of the emission at hundreds of TeV. In this scenario, no detectable neutrino flux would be expected.
description: ApJL in press
Info for the Gaia Catalogue of Nearby Stars
Creators: name: Smart, Richard
name: Sarro, Luis
name: Rybizki, Jan
name: Reyle, Celine
name: Robin, Annie
name: Hambly, Nigel
name: Abbas, Ummi
name: Barstow, Martin
name: Bruijne, Jos De
name: Bucciarelli, Beatrice
name: Carrasco, Josep
name: Cooper, William
name: Hodgkin, Simon
name: Masana, Edargo
name: Michalik, Daniele
name: Sahlmann, Johannes
name: Sozzetti, Alessandro
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence
Very low mass stars

description: The Gaia Catlogue of Nearby Stars is a catalogue of 331,312 objects that contains at least 92% of stars of stellar type M9 within 100pc of the Sun. We estimate that 9% of the stars in this catalogue probably lie outside 100, pc, but when the distance probability
 function is used, a correct treatment of this contamination is possible. We produced luminosity functions with a high signal-to-noise ratio for the main-sequence stars, giants, and white dwarfs. We examine in detail the Hyades cluster, the white dwarf population, and wide-binary systems and produced candidate lists for all three samples. We detected local manifestations of several streams, superclusters, and halo objects, in which we identified 12 members of the Gaia Enceladus. We present the first direct parallaxes of five objects in multiple systems within 10pc of the Sun. In this poster we provide links to the outreach materials, data access and discussion groups of the GCNS project.
I CORSI IBRIDI DI ITALIANO L2: LEZIONI IN PRESENZA E PIATTAFORME MULTIMEDIALI COME STRUMENTI DI CO-COSTRUZIONE DELLA CONOSCENZA
Creators: name: Baccari, Rosetta
Publisher: name: Italiano LinguaDue
Year: 2015

description: L’articolo parte dalla riflessione sull’utilizzo delle tecnologie educative nel mondo contemporaneo per poi mostrare i vantaggi e le potenzialità dei corsi ibridi o blended nel processo di insegnamento/apprendimento dell’italiano L2. A supporto di tale tesi sono riportate le osservazioni tratte dall’esperienza di tirocinio svolta presso il PLO Pepe del Comune di Milano dove è stato attivato con successo un corso ibrido di 10° livello (livello C1 del QCER). Il corso, basato sull’integrazione tra le tradizionali lezioni in classe e le lezioni on-line a distanza tramite la piattaforma Moodle, ha consentito di superare i limiti e le difficoltà connessi a ciascuna modalità di insegnamento/apprendimento quando applicata isolatamente e ha permesso di creare una comunità di apprendimento in cui ciascun apprendente ha avuto la possibilità di costruire e co-costruire con gli altri il percorso di apprendimento secondo i propri ritmi e bisogni. L’ultima parte del lavoro riguarda una proposta di insegnamento dell’italiano L2 attraverso l’utilizzo di Edmodo, una piattaforma digitale alternativa a Moodle. Gratuita e di facile utilizzo, permette agli studenti di partecipare in modo attivo e costruttivo alle attività proposte e agli insegnanti di personalizzare e rendere più accattivante l’offerta didattica.

Hybrid Italian L2 courses: frontal lessons and multimedia platforms as instruments in the co-construction of knowledge

The article begins by discussing the current use of educational technology, highlighting the advantages and potentials of hybrid or blended courses in L2 teaching/learning. To support this thesis, observations are drawn from training experiences which took place at the PLO Pepe in Milan where a hybrid 10th level course (level C1 CEFR) was activated. The course, based on the integration between traditional classroom and online classes held remotely via the Moodle platform, enabled us to overcome the limitations and difficulties associated with each mode of teaching/learning when applied separately and allowed us to create a learning community where each learner had the chance to build and co-build their learning, doing it according to their own pace and needs. The last part is a proposal for teaching Italian L2 using Edmodo, a digital platform alternative to Moodle. Free and easy to use, it allows students to actively and constructively participate in the proposed activities and teachers to customize and make their teaching more appealing.
description: Italiano LinguaDue, Vol 7, No 1 (2015)
Dynamical Evolution of Globular Cluster Systems formed in Galaxy Mergers: Deep HST/ACS Imaging of Old and Intermediate-Age Globular Clusters in NGC 3610
Creators: name: Goudfrooij, Paul
name: Schweizer, Francois
name: Gilmore, Diane
name: Whitmore, Bradley C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (ABRIDGED) The ACS camera on board the Hubble Space Telescope has been used to obtain deep images of the giant elliptical galaxy NGC 3610, a well-established dissipative galaxy merger remnant. These observations supersede previous WFPC2 images which revealed the presence of a population of metal-rich globular clusters (GCs) of intermediate age (~1.5-4 Gyr). We detect a total of 580 GC candidates, 46% more than from the previous WFPC2 images. The new photometry strengthens the significance of the previously found bimodality of the color distribution of GCs. Peak colors in V-I are 0.93 +/-0.01 and 1.09 +/- 0.01 for the blue and red subpopulations, respectively. The luminosity function (LF) of the inner 50% of the metal-rich (`red') population of GCs differs markedly from that of the outer 50%. In particular, the LF of the inner 50% of the red GCs shows a flattening consistent with a turnover that is about 1.0 mag fainter than the turnover of the blue GC LF. This is consistent with predictions of recent models of GC disruption for the age range mentioned above and for metallicities that are consistent with the peak color of the red GCs as predicted by population synthesis models. We determine the specific frequency of GCs in NGC 3610 and find a present-day value of S_N = 1.4 +/- 0.6. We estimate that this value will increase to S_N = 3.8 +/- 1.7 at an age of 10 Gyr, which is consistent with typical S_N values for `normal' ellipticals. Our findings constitute further evidence in support of the notion that metal-rich GC populations formed during major mergers involving gas-rich galaxies can evolve dynamically (through disruption processes) into the red, metal-rich GC populations that are ubiquitous in `normal' giant ellipticals.
description: 15 pages, 14 figures, 4 tables. Accepted for publication in The Astronomical Journal. Figure 6 somewhat degraded to adhere to astro-ph rules
Hyperfine structure and predissociation of the B ³[pi]₀ + state of bromine
Creators: name: Booth, James L.
Publisher: name: University of British Columbia
Year: 2009

description: Investigations have been carried out in bromine of the hyperfine structure of the B ³II₀u+ and X ¹Σg⁺ electronic states and of the predissociation of the B ³ll₀u+ state by the ¹ll₁u dissociative level. The technique of laser induced fluorescence of a molecular beam was used. ⁷⁹Br⁸¹Br hyperfine spectra were recorded for various B - X vibrational bands (v’ ←v”) with v’ = 11 through 17 and v” = 0, 1, and 2, and for various rotational transitions (J’ ← J”) with J’ from 0 to 11 and J” from 0 to 10. As well, the ⁷⁹Br₂ and ⁸¹Br₂ hyperfine spectra of the (13’ — 0”) and (17’ — 2”) bands over the same range of rotational states were measured. The spectra are well described using one X state parameter: the electric quadrupole coupling constant eqQx; and two B state parameters: the electric quadrupole coupling constant eqQB, and the nuclear spin-rotation constant Csr. The results show that eqQB(⁷⁹Br) = (177.0 ± 0.6) MHz for v’ = 11 and increases by approximately 0.5 MHz per vibrational quantum up to (180.6 ± 1.4) MHz for v’ 17. Similarly the ground state electric quadrupole coupling constant, eqQx(⁷⁹Br) (808.1 ± 1.4) MHz for v” = 0 and increases by about 1 MHz per vibrational quantum to (811.4 ± 1.4) MHz for v” = 2. The hyperfine data also provided a check on the accuracy of some of the published rovibronic constant¹ for each isotopomer. In order to reproduce the observed relative spacings of the transitions for all three isotopomers, the published term values, T₀₀, have to be modified ; this can be done by decreasing the published values of T₀₀ for ⁸¹Br₂ and ⁷⁹Br⁸¹Br by (177 ± 8) MHz and (326 ± 8) MHz, respectively. The phase shift technique was applied to the study of the predissociation of the v’ = 13 B ³II₀u⁺ electronic state of bromine. The lifetimes of individual hyperfine levels were ¹S. Gerstenkorn and P. Luc, J. Phys. France 50, 1417 (1989). measured for the rotational states J’ = 0 - 7 (except for J’ 2) for each isotopomer of bromine. Revised values are given for the radiative decay rate Γrad, the gyroscopic predissociation parameter Cv, and the magnetic dipole predissociation parameter av. The first observation of electric quadrupole predissociation is reported and is characterized by a new molecular parameter, bv.
Πλατφόρμα υπηρεσιών ανάλυσης αδόμητων δεδομένων – Εξόρυξη γνώσης από μέσα κοινωνικής δικτύωσης για θέματα δημόσιας υγείας
Creators: name: Κάκαλου, Χριστίνα-Ασημίνα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: HIV
Προφύλαξη πριν την έκθεση
PrEP
Truvada
Εξόρυξη κειμένου
Εξόρυξη απόψεων
Ανάλυση συναισθήματος
Δημόσια Υγεία
Μέσα κοινωνικής δικτύωσης
Twitter
Επεξεργασία φυσικού λόγου
NLP
Παρακολούθηση τάσεων Δημόσιας Υγείας
Pre-Exposure Prophylaxis
Text mining
Sentiment analysis
Opinion mining
Public Health
Social media
Natural language processing
Public Health trends monitoring

description: Η προφύλαξη πριν την έκθεση (PrEP) είναι μια πρωτοποριακή προσπάθεια αναχαίτησης της επιδημίας του HIV που επιτυγχάνεται με τη λήψη αντιρετροϊκης θεραπείας από οροαρνητικά άτομα που παρουσιάζουν υψηλό κίνδυνο μόλυνσης από τον ιό. Αν ληφθεί σωστά, το ποσοστό προφύλαξης πλησιάζει το 99%. Στη παρούσα διπλωματική εργασία χρησιμοποιούνται τεχνικές εξόρυξης κειμένου από το μέσο κοινωνικής δικτύωσης Twitter για τον εντοπισμό και τη παρακολούθηση των τάσεων σχετικών με την PrEP. Τα αποτελέσματα δείχνουν ότι ένα τέτοιο σενάριο είναι εφικτό να εντοπίσει τα κύρια θέματα συζήτησης σχετικά με την PrEP, να παρακολουθήσει τις τάσεις που διαμορφώνονται κατά τη πάροδο του χρόνου και να αξιολογήσει τις απόψεις που αναπτύσσονται, ακόμα και τα συναισθήματα που εκφράζονται σχετικά με αυτή.
description: Pre-Exposure Prophylaxis (PrEP) is a revolutionary approach to curb the HIV epidemic by providing HIV-negative persons at high risk of infection, with antiretroviral medication. If taken correctly, the level of protection against HIV reaches 99%. The current thesis uses text mining techniques on Twitter posts to identify and monitor PrEP-related trends. Results show that such a scenario is feasible and can identify the main topics of discussion concerning PrEP, monitor the progression of those trends over time and evaluate the sentiment, even the emotions that are expressed regarding PrEP.
L’ITALIANO NELLA SVIZZERA TEDESCA
Creators: name: Fantuzzi, Francesca
Publisher: name: Italiano LinguaDue
Year: 2015

description: Il presente lavoro è frutto di un’indagine realizzata all’interno dei corsi di lingua italiana organizzati dall’Istituto Italiano di Cultura di Zurigo in collaborazione con la Fondazione ECAP. Nella prima parte della ricerca si indaga la diffusione dello studio dell’italiano come LS nella Svizzera tedesca e si traccia il profilo dei frequentanti i corsi di italiano dell’ECAP. I risultati delle interviste vengono poi confrontati con alcuni studi recenti circa la diffusione dell’italiano nel mondo. La seconda parte del lavoro analizza la funzione svolta dai corsi di formazione professionale in lingua italiana per adulti nel panorama formativo della Svizzera tedesca. Dopo una breve ricostruzione della nascita e dell’evoluzione di tali corsi, viene analizzato il caso specifico del corso di formazione per Elettricista di montaggio. L’indagine prosegue tracciando un quadro d’insieme dei frequentanti il corso 2015-2017 dal quale emergono significative novità riguardo alla provenienza dei nuovi iscritti. I risultati delle interviste e l’analisi di un testo, prodotto da uno studente ispanofono, permettono, infine, di trarre alcune considerazioni circa la funzione della lingua italiana nei corsi di formazione professionale della Svizzera tedesca.

Italian as a second language in German Switzerland

This paper analyzes the data collected during an internship at the ECAP Foundation, which organizes Italian courses in cooperation with the Istituto Italiano di Cultura in Zurich. We start by investigating how Italian as a second language is studied in the German-speaking parts of Switzerland by profiling the characteristics and motivation of students, and we proceed by comparing the results of the interviews with data from recent studies about the state of Italian studies abroad. The second part of this paper investigates the role of the Italian language in adult vocational education. After a brief history of the beginning and evolution of these vocational courses, we analyze the specific case of the courses for Elettricista di montaggio in greater depth. The collected data gives us a profile of the attendees during the 2015-2017 course and lets us draw conclusions about the provenance of the students. By analyzing interviews with the students and the written test of a Spanish-speaking student, we can draw conclusions about the usage of the Italian language both in learning and work environments in German-speaking Switzerland.
description: Italiano LinguaDue, Vol 7, No 1 (2015)
Fermions tunnelling from the charged dilatonic black holes
Creators: name: Chen, De-You
name: Jiang, Qing-Quan
name: Zu, Xiao-Tao
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Kerner and Mann's recent work shows that, for an uncharged and non-rotating black hole, its Hawking temperature can be exactly derived by fermions tunnelling from its horizons. In this paper, our main work is to improve the analysis to deal with charged fermion tunnelling from the general dilatonic black holes, specifically including the charged, spherically symmetric dilatonic black hole, the rotating Einstein-Maxwell-Dilaton-Axion (EMDA) black hole and the rotating Kaluza-Klein (KK) black hole. As a result, the correct Hawking temperatures are well recovered by charged fermions tunnelling from these black holes.
description: 16 pages, revised version to appear in Class. Quant. Grav
Ποιότητα δημοσιευμένων χρηματοοικονομικών καταστάσεων
Creators: name: Γιώτη, Ελευθερία Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ποιότητα
Χρηματοοικονομικές καταστάσεις
Αριθμοδείκτες
Quality
Financial statements
Accounting ratios

description: Στο πρώτο κεφάλαιο γίνεται λόγος για τον ορισμό ,το σκοπό που εξυπηρετούν , ποιοι είναι οι χρήστες που τις αξιοποιούν και ποια τα είδη των χρηματοοικονομικών καταστάσεων. Στο δεύτερο κεφάλαιο συσχετίζονται οι χρηματοοικονομικές καταστάσεις με την ποιότητα. Παρουσιάζονται η έννοια της ποιότητας και τα ποιοτικά χαρακτηριστικά των χρηματοοικονομικών καταστάσεων . Γίνεται αναφορά στην εκτίμηση της ποιότητας , στον έλεγχο και τα είδη των ελέγχων των χρηματοοικονομικών καταστάσεων. Στο τρίτο κεφάλαιο γίνεται η ανάλυση της εταιρικής διακυβέρνησης , του εξωτερικού και εσωτερικού ελέγχου στην ποιότητα των χρηματοοικονομικών καταστάσεων. Επίσης γίνεται και η ανάλυση σε σχέση με την απάτη. Στο τέταρτο κεφάλαιο αναφέρονται και αναλύονται η μεθοδολογία , το δείγμα , τα οικονομικά μεγέθη και τέλος οι αριθμοδείκτες που χρησιμοποιούνται στο τελευταίο κεφάλαιο κατά τη διεξαγωγή έρευνας. Στο πέμπτο κεφάλαιο γίνεται έρευνα 30 Ελληνικών επιχειρήσεων εισηγμένων στο Χρηματιστήριο Αξιών Αθηνών που καταλήγει σε χρήσιμα συμπεράσματα σε σχέση με την οικονομική κατάσταση στην οποία βρίσκονται επιχειρήσεις με υψηλή και χαμηλή ποιότητα χρηματοοικονομικών καταστάσεων.
description: In the first chapter we talk about the definition, the purpose they serve, the users who use them and what types of financial statements. The second chapter relates financial statements to quality. The concept of quality and qualitative characteristics of the financial statements is presented. Reference is made to the assessment of quality, control and types of audits of the financial statements. The third chapter analyzes corporate governance, external and internal control over the quality of the financial statements. Fraud analysis also takes place. The fourth chapter discusses and analyzes the methodology, sample, financial figures and finally the numerical data used in the last chapter during the investigation. In the fifth chapter, a survey is conducted of 30 Greek companies listed on the Athens Stock Exchange, which concludes with useful conclusions regarding the financial situation of companies with high and low quality financial statements.
UFP-Integrating action for cleaner air and climate protection
Creators: name: Jagusiewicz, Andrzej
name: Murlis, John
Publisher: name: Karlsruhe
Year: 2019

description: The background information related to health effects and damage caused to ecosystems by PM atmospheric pollution, particularly by its fine fraction, will be summarisedCurrent international policy instruments for reducing airborne emissions and, consequently, improving air quality, will be reviewed. In particular the EU clean air package and the UN/ECE initiatives under the Long-Range Transboundary Air Pollution Convention (LRTAP), including the recentlyadopted Long-term Strategy, will be considered. The air policy initiatives by EFCA related to improve air quality in relation to PM and its ultrafine fraction/Black Carbon will be described and assessed. Combustion of all kinds produces PM pollution, including its ultrafine fraction (UFP). Carbonaceous particles in form of Black Carbon (BC) and Organic Aerosols (OA) are of particular concern. UFPs are also formed as secondary pollutants. The latter have substantial influence on particle formation and their growth generates half of the cloud condensation nuclei in the atmosphere. Non-CO2 Greenhouse Gases (NCGG), however, are underestimated as pollutants by the climate policy community and deserve to be treated as equally important. UFPs play an important role in policy to reduce toxic air pollution and climate forcers. The series of UFP Symposia has provided strong evidence of impact, and information on sources and effective control techniques. EFCA therefore believes it is now timely to consider policy aspect. It fully supports UFP/BC regulation, including new ceilings in the EU NEC Directive and the revised Gothenburg Protocol under the LRTAP. Moreover, a new metric is urgently needed for UFPs, expressed in weight and by number of particles. Also, dual policy, integrating cleaner air and climate protection criteria, to combat UFPs can be more effective and generate co-benefits for both. The role of integrated policy, as opposed to the current practice of separate sectoral policies in combatting air pollution will be considered with reference to concrete examples, including from the energy system.
Extending superposed harmonic initial data to higher spin
Creators: name: Ma, Sizheng
name: Giesler, Matthew
name: Scheel, Mark
name: Varma, Vijay
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Numerical simulations of binary black holes are accompanied by an initial spurious burst of gravitational radiation (called `junk radiation') caused by a failure of the initial data to describe a snapshot of an inspiral that started at an infinite time in the past. A previous study showed that the superposed harmonic (SH) initial data gives rise to significantly smaller junk radiation. However, it is difficult to construct SH initial data for black holes with dimensionless spin $χ\gtrsim0.7$. We here provide a class of spatial coordinate transformations that extend SH to higher spin. The new spatial coordinate system, which we refer to as superposed modified harmonic (SMH), is characterized by a continuous parameter -- Kerr-Schild and harmonic spatial coordinates are only two special cases of this new gauge. We compare SMH with the superposed Kerr-Schild (SKS) initial data by evolving several binary black hole systems with $χ=0.8$ and $0.9$. We find that the new initial data still leads to less junk radiation and only small changes of black hole parameters (e.g. mass and spin). We also find that the volume-weighted constraint violations for the new initial data converge with resolution during the junk stage $(t\lesssim700M)$, which means there are fewer high-frequency components in waveforms at outer regions.
DA UGO FOSCOLO UFFICIALE A IL CAPITANO UGO FOSCOLO: MUTAMENTI LINGUISTICO-LETTERARI IN UN DITTICO SELF-HELPISTA DI EDMONDO DE AMICIS
Creators: name: Dota, Michela
Publisher: name: Italiano LinguaDue
Year: 2015

description: Sul finire del soggiorno fiorentino, dopo pochi mesi dalla seconda edizione della Vita militare, Edmondo De Amicis pubblica sull’Italia militare, periodico che avvia la sua carriera letteraria, un contributo singolare: Ugo Foscolo Ufficiale. È la prima versione, oggi quasi dimenticata, dell’articolo poi riedito nei Ricordi del 1870-‘71 e denominato Il Capitano Ugo Foscolo. La metamorfosi del titolo è solo il sintomo epidermico di una revisione che scompagina il contributo tanto nella facies linguistica quanto nel contenuto, secondo la prassi di perpetuo labor limae dei propri scritti appresa nel salotto Peruzzi. Il presente contributo contestualizza le due versioni dell’articolo nella biografia linguistico-letteraria di De Amicis, analizzando i mutamenti e i motivi degli stessi in relazione agli scopi, ai pubblici e alle sedi di pubblicazione.

From Ugo Foscolo ufficiale to il capitano Ugo Foscolo:
literary and linguistic changes in a self-help diptych by Edmondo De Amicis

After the second edition of Military life in Italy and at the end of his stay in Florence, Edmondo de Amicis published an opinion article, Ugo Foscolo Ufficiale, in Italia militare, the magazine where he began his literary career. It is an almost unknown first version of another article entitled Il Capitano Ugo Foscolo contained in Ricordi 1870-‘71. The title change was only a superficial sign of the revision regarding content and linguistic aspects, an inheritance of Emilia Peruzzi’s writing lessons. The study aims to contextualize these two different versions of De Amicis’ article within his literary and linguistic biography. It also analyzes the changes between the versions regarding their scopes, readers and types of editions.
description: Italiano LinguaDue, Vol 7, No 1 (2015)
Η εξέταση της ποιότητας των υπηρεσιών δύο μουσείων στην περιοχή της Θεσσαλονίκης, ο βαθμός ικανοποίησης των επισκεπτών και η μελλοντική τους συμπεριφορά. Αρχαιολογικό μουσείο Θεσσαλονίκης & Κέντρο διάδοσης επιστημών και μουσείο τεχνολογίας – Νόησις
Creators: name: Δασκαλάκη, Βασιλική Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ποιότητα υπηρεσιών
Μουσεία
Ικανοποίηση και μελλοντική συμπεριφορά πελατών
Servqual
Servperf
Service quality

description: Η παρούσα μεταπτυχιακή εργασία, έχει ως στόχο να μελετήσει τους παράγοντες που επηρεάζουν την ικανοποίηση των επισκεπτών αλλά και τη μελλοντική τους συμπεριφορά. Τα μουσεία που επιλέχθηκαν να συμμετέχουν στην έρευνα δραστηριοποιούνται στην περιοχή της Θεσσαλονίκης και πρόκειται για το Αρχαιολογικό Μουσείο Θεσσαλονίκης και για το Κέντρο Διάδοσης Επιστημών και Μουσείο Τεχνολογίας - Νόησις. Η μεθοδολογική προσέγγιση στηρίχθηκε σε πρωτογενή ποσοτική έρευνα με τη χρήση δομημένου ερωτηματολογίου το οποίο σχεδιάστηκε με βάση το μοντέλο SERVPERF. Συνολικά και από τα δύο Μουσεία συλλέχθηκαν 632 έγκυρα ερωτηματολόγια – 320 ερωτηματολόγια από το Αρχαιολογικό Μουσείο και 312 από το Κέντρο Διάδοσης Επιστημών και Μουσείο Τεχνολογίας – Νόησις. Βασικά συμπεράσματα ήταν πως τα στοιχεία που εξετάζουν οι πέντε διαστάσεις του μοντέλου SERVPERF μπορούν να προσδιορίσουν το επίπεδο της ικανοποίησής αλλά και τη μελλοντική συμπεριφορά. Παράλληλα η μελλοντική συμπεριφορά των επισκεπτών εμφανίζεται να επηρεάζεται από τον τόπο καταγωγής τους και συγκεκριμένα από το αν είναι από την Ελλάδα ή το εξωτερικό. Τέλος το είδος του μουσείου φαίνεται να αποτελεί παράγοντα που επηρεάζει το επίπεδο της ικανοποίησης αλλά και τη μελλοντική συμπεριφορά των επισκεπτών.
description: The aim of the present thesis was to investigate the factors that affects visitors’ satisfaction and their future behavior. The museums selected to participate in the research, are active in Thessaloniki (Greece) and are the Archaeological Museum of Thessaloniki and the Thessaloniki Science Center and Technology Museum - Noesis. The method of approach was the quantitative collection of primary data, using a questionnaire based on the dimensions of SERVPERF’s model. 632 valid questionnaires were collected from both Museums - 320 questionnaires from the Archaeological Museum and 312 from the Thessaloniki Science Center and Technology Museum – Noesis. The main results of the survey showed that the elements examined by the five dimensions of the SERVPERF model can determine the degree of visitors’ satisfaction and their future behavior. At the same time, the visitors’ future behavior, appears to be affected by their place of residence. Last but not least, the type of museum seems to be a factor that affects the level of visitors’ satisfaction and their future behavior.
J/psi Production vs Centrality, Transverse Momentum, and Rapidity in Au+Au Collisions at sqrt(s_NN) = 200 GeV
Creators: name: PHENIX Collaboration
name: Adare, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has measured J/psi production for rapidities 2.2 < y < 2.2 in Au+Au collisions at sqrt(s_NN) = 200 GeV. The J/psi invariant yield and nuclear modification factor R_AA as a function of centrality, transverse momentum and rapidity are reported. A suppression of J/psi relative to binary collision scaling of proton-proton reaction yields is observed. Models which describe the lower energy J/Psi data at the Super Proton Synchrotron (SPS) invoking only J/psi destruction based on the local medium density would predict a significantly larger suppression at RHIC and more suppression at mid rapidity than at forward rapidity. Both trends are contradicted by our data.
description: 422 authors from 58 institutions, 6 pages, 5 figures, 2 tables, RevTeX4. Submitted to Physical Review Letters. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
Efficient Two-Stream Network for Violence Detection Using Separable Convolutional LSTM
Creators: name: Islam, Zahidul
name: Rukonuzzaman, Mohammad
name: Ahmed, Raiyan
name: Kabir, Md. Hasanul
name: Farazi, Moshiur
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Automatically detecting violence from surveillance footage is a subset of activity recognition that deserves special attention because of its wide applicability in unmanned security monitoring systems, internet video filtration, etc. In this work, we propose an efficient two-stream deep learning architecture leveraging Separable Convolutional LSTM (SepConvLSTM) and pre-trained MobileNet where one stream takes in background suppressed frames as inputs and other stream processes difference of adjacent frames. We employed simple and fast input pre-processing techniques that highlight the moving objects in the frames by suppressing non-moving backgrounds and capture the motion in-between frames. As violent actions are mostly characterized by body movements these inputs help produce discriminative features. SepConvLSTM is constructed by replacing convolution operation at each gate of ConvLSTM with a depthwise separable convolution that enables producing robust long-range Spatio-temporal features while using substantially fewer parameters. We experimented with three fusion methods to combine the output feature maps of the two streams. Evaluation of the proposed methods was done on three standard public datasets. Our model outperforms the accuracy on the larger and more challenging RWF-2000 dataset by more than a 2% margin while matching state-of-the-art results on the smaller datasets. Our experiments lead us to conclude, the proposed models are superior in terms of both computational efficiency and detection accuracy.
description: Accepted by the 2021 International Joint Conference on Neural Networks (IJCNN 2021)
The lattice Landau gauge photon propagator for 4D compact QED
Creators: name: Loveridge, Lee C.
name: Oliveira, Orlando
name: Silva, Paulo J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: In this work we report on the Landau gauge photon propagator computed for pure gauge 4D compact QED in the confined and deconfined phases and for large lattices volumes: $32^4$, $48^4$ and $96^4$. In the confined phase, compact QED develops mass scales that render the propagator finite at all momentum scales and no volume dependence is observed for the simulations performed. Furthermore, for the confined phase the propagator is compatible with a Yukawa massive type functional form. For the deconfined phase the photon propagator seems to approach a free field propagator as the lattice volume is increased. In both cases, we also investigate the static potential and the average value of the number of Dirac strings in the gauge configurations $m$. In the confined phase the mass gap translates into a linearly growing static potential, while in the deconfined phase the static potential approaches a constant at large separations. Results shows that $m$ is, at least, one order of magnitude larger in the confined phase and confirm that the appearance of a confined phase is connected with the topology of the gauge group.
description: Version accepted for publication in PRD
Suzaku Observations of the Centaurus Cluster: Absence of Bulk Motions in the Intracluster Medium
Creators: name: Ota, Naomi
name: Fukazawa, Yasushi
name: Fabian, Andrew C.
name: Kanemaru, Takehiro
name: Kawaharada, Madoka
name: Kawano, Naomi
name: Kelley, Richard L.
name: Kitaguchi, Takao
name: Makishima, Kazuo
name: Matsushita, Kyoko
name: Murase, Kouichi
name: Nakazawa, Kazuhiro
name: Ohashi, Takaya
name: Sanders, Jeremy S.
name: Tamura, Takayuki
name: Urata, Yuji
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Centaurus cluster (z=0.0104) was observed with the X-ray Imaging Spectrometer (XIS) onboard the Suzaku X-ray satellite in three pointings, one centered on the cluster core and the other two offset by +-8' in declination. To search for possible bulk motions of the intracluster medium, the central energy of He-like Fe-K line (at a rest-frame energy of 6.7 keV) was examined to look for a positional dependence. Over spatial scales of 50 kpc to 140 kpc around the cluster core, the central line energy was found to be constant within the calibration error of 15 eV. The 90% upper limit on the line-of-sight velocity difference is |Delta_v|< 1400 km/s, giving a tighter constraint than previous measurements. The significant velocity gradients inferred from a previous Chandra study were not detected between two pairs of rectangular regions near the cluster core. These results suggest that the bulk velocity does not largely exceed the thermal velocity of the gas in the central region of the Centaurus cluster. The mean redshift of the intracluster medium was determined to be 0.0097, in agreement with the optical redshift of the cluster within the calibration uncertainty. Implications of the present results for the estimation of the cluster mass are briefly discussed.
description: 9 pages, 4 figures. Accepted for publication in PASJ. Version with high-quality color figures at http://cosmic.riken.jp/ota/publications/index.html
Συναλλαγματική πολιτική και ελληνικές εξαγωγές - ιστορική αναδρομή και σύγχρονο πλαίσιο
Creators: name: Κελεμτζή, Αλεξάνδρα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Εισαγωγές
Εξαγωγές
Συναλλαγματική ισοτιμία
Imports
Exports
Exchange rate

description: Σκοπός της παρούσας μελέτης είναι να διερευνηθεί η σχέση μεταξύ της συναλλαγματικής ισοτιμίας και της εξαγωγικής δραστηριότητας και να ελεγχθεί και η ισχύς της συνθήκης Marshall-Lerner για την περίπτωση της Ελλάδας σε ένα δείγμα 67 χωρών κατά την περίοδο 2001-2014, προκειμένου αυτό να συμβάλλει στη συζήτηση γύρω από το δίλημμα ευρώ/δραχμής σε σχέση με τη βελτίωση της εμπορικής θέσης της Ελλάδας. Αρχικά πραγματοποιήθηκαν έλεγχοι μοναδιαίας ρίζας για τη διαπίστωση του βαθμού ολοκλήρωσης των χρονοσειρών. Στη συνέχεια, λόγω του βαθμού ολοκλήρωσης ένα των χρονοσειρών, πραγματοποιήθηκε ανάλυση συνολοκλήρωσης με τη μεθοδολογία Johansen-Fischer. Από την ανάλυση προέκυψε ότι οι μεταβολές στην συναλλαγματική ισοτιμία δεν επηρεάζουν στατιστικά σημαντικά το εμπορικό ισόζύγιο της Ελλάδας , επομένως το πρώτο σκέλος της
description: The purpose of this study is to investigate the euro / drachma dilemma in relation to the improvement of Greece's commercial position during the period 2001-2014. For this purpose, the validity of the Marshall-Lerner theory in the case of Greece was examined in a sample of 67 countries. Unit root testing procedures were performed to determine the degree of integretion of the examined series. Then, due to the fact that the series were integrated of order one, cointegration analysis was performed by means of the methodology of Johansen-Fischer. The analysis showed that a possible devalueation of Real Exchange Rate could not increase the Trade Balance of Greece.
MEAL IN ITALY. ITALIANISMI NEL LINGUAGGIO GASTRONOMICO INGLESE ED ANGLOAMERICANO
Creators: name: Perissinotto, Francesca
Publisher: name: Italiano LinguaDue
Year: 2015

description: La presenza di italianismi nel linguaggio gastronomico inglese ed angloamericano è indice dell’influenza culturale nostrana del cibo e della buona tavola nel contesto internazionale. L’analisi considera il fenomeno interlinguistico nelle sue manifestazioni più recenti, attraverso i media, andando poi a studiarne le caratteristiche linguistiche in una duplice prospettiva diacronica e sincronica. Il confronto con le ricerche di Stammerjohann e Pinnavaia permette infine di valutare l’evoluzione del contatto linguistico nel tempo, dal 1400 ai giorni dell’Esposizione Internazionale.

Meal in Italy.
Italianisms in English and Anglo-American language related to food.

The presence of Italianisms in English and Anglo-American language related to food is a sign of our cultural influence related food within the international context. This analysis considers the interlinguistic phenomenon in its most recent manifestations in the media, then investigates the linguistic features in a dual diachronic and synchronic perspective. Comparison with the research conducted by Stammerjohann and Pinnavaia leads to an evaluation of the evolution of language contact over time, from 1400 to the current International exhibition.
description: Italiano LinguaDue, Vol 7, No 1 (2015)
Receptive vocabulary knowledge of CLIL and non-CLIL learners: a comparison between two different learning contexts
Creators: name: Πλακιά, Αθηνά-Μαρία Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Δεκτικό λεξιλόγιο
CLIL (ολιστική εκμάθηση γλώσσας και περιεχομένου)
Πρωτοβάθμια εκπαίδευση
Receptive vocabulary
CLIL (Content and Language Integrated Learning)
Primary education

description: The aim of the present thesis was to examine the receptive vocabulary knowledge of both a CLIL (Content and Language Integrated Learning) and a non-CLIL group of the sixth grade of primary school. Hence, 21 learners were selected from the CLIL group of the 3rd Experimental Primary School of Evosmos, Thessaloniki and 20 learners from the Primary School of Kompoti, Arta that attended traditional EFL courses. All learners were examined by means of a VLT (Vocabulary Levels Test) and a questionnaire offering important information on the learners’ profile. Results showed that CLIL learners outperformed the non-CLIL ones in all the word-frequency levels, as expected, and held larger receptive vocabulary sizes. Gender differences were not statistically significant except for the case of the 5,000 word-frequency level in the CLIL group. The different activities practiced by the CLIL and the non-CLIL group out of school context were also very interesting, seeming to influence positively receptive vocabulary knowledge.
description: Σκοπός της διατριβής ήταν η διερεύνηση του δεκτικού λεξιλογίου ενός τμήματος CLIL (ολιστική εκμάθηση γλώσσας και περιεχομένου) και ενός τμήματος non-CLIL της ΣΤ τάξης του Δημοτικού Σχολείου. Στην έρευνα συμμετείχαν 21 μαθητές από την ομάδα CLIL του 3ου Πειραματικού Σχολείου Ευόσμου, Θεσσαλονίκης και 20 μαθητές από το Δημοτικό Σχολείο Κομποτίου, Άρτας που δεν συμμετείχαν σε πρόγραμμα CLIL. Όλοι οι μαθητές εξετάστηκαν μέσω του τεστ δεκτικού λεξιλογίου (VLT) και ενός ερωτηματολογίου που περιείχε σημαντικές ερωτήσεις για το προφίλ των μαθητών. Τα αποτελέσματα έδειξαν ότι οι μαθητές της ομάδας CLIL είχαν καλύτερα σκορ και μεγαλύτερο δεκτικό λεξιλόγιο από τους μαθητές της ομάδας non-CLIL. Όσον αφορά το φύλο, δεν υπήρχαν στατιστικά σημαντικές διαφορές εκτός από την κατηγορία των 5.000 λέξεων. Οι δραστηριότητες εκμάθησης αγγλικών εκτός σχολείου μελετήθηκαν επιδεικνύοντας μια θετική επίδραση στην εκμάθηση δεκτικού λεξιλογίου.
Competing Ferromagnetic and Charge-Ordered States in Models for Manganites: the Origin of the CMR Effect
Creators: name: Sen, Cengiz
name: Alvarez, Gonzalo
name: Dagotto, Elbio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The one-orbital model for manganites with cooperative phonons and superexchange coupling $J_{\rm AF}$ has been investigated via large-scale Monte Carlo (MC) simulations. Results for two-orbitals are also briefly discussed. Focusing on electronic density $n$=0.75, a regime of competition between ferromagnetic (FM) metallic and charge-ordered (CO) insulating states was identified. In the vicinity of the associated bicritical point, colossal magnetoresistance (CMR) effects were observed. The CMR is associated with the development of short-distance correlations among polarons, above the spin ordering temperatures, resembling the charge arrangement of the low-temperature CO state.
description: 4 pages, 4 figures, accepted for publication in the Phys. Rev. Lett
I PRONOMI COMBINATI NELL’INSEGNAMENTO DELLA LINGUA ITALIANA A STRANIERI
Creators: name: Trotta, Marzia
Publisher: name: Italiano LinguaDue
Year: 2015

description: L’oggetto della riflessione di questo lavoro è l’insegnamento dei pronomi combinati nell’ambito della didattica dell’italiano per stranieri. Dopo aver preso in esame alcuni corsi di italiano per stranieri pubblicati nel periodo che va dagli Ottanta fino al 2010 per osservare, in relazione anche ai diversi approcci e metodi a cui essi fanno riferimento, come vengano trattate la presentazione e l’esercitazione dei pronomi combinati, si presenta una unità didattica a questi specificatamente dedicata. L’obiettivo è far cogliere all’apprendente straniero la struttura e il funzionamento di tali pronomi in base ad un approccio che fa riferimento anche alla grammatica valenziale.

Combined pronouns in teaching of italian to foreigners

The object of this work is the teaching of the combined pronouns Italian to foreigners. Having examined some Italian language courses for foreigners published between the eighties until 2010. We observed, also with regard to the different approaches and methods, how combined pronouns are presented and practiced in specifically dedicated teaching units. The goal is for the learner foreign to assimilate the structure and function of these pronouns according to an approach that also refers to the concept of valency.
description: Italiano LinguaDue, Vol 7, No 1 (2015)
VERSO UNA DIDATTICA LINGUISTICA RIFLESSIVA. PERCORSI DI FORMAZIONE INIZIALE PER INSEGNANTI DI ITALIANO COME LINGUA NON MATERNA
Creators: name: Arcuri, Adriana
name: Mocciaro, (A Cura Di), Egle
Publisher: name: Italiano LinguaDue
Year: 2015

description: Recensione
description: Italiano LinguaDue, Vol 7, No 1 (2015)