cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Nature of the Perpendicular-to-Parallel Spin Reorientation in a Mn-doped GaAs Quantum Well: Canting or Phase Separation?
Creators: name: Fishman, Randy S.
name: Reboredo, Fernando A.
name: Brandt, Alex
name: Moreno, Juana
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: It is well known that the magnetic anisotropy in a compressively-strained Mn-doped GaAs film changes from perpendicular to parallel with increasing hole concentration $p$. We study this reorientation transition at T=0 in a quantum well with Mn impurities confined to a single plane. With increasing $p$, the angle $θ$ that minimizes the energy $E$ increases continuously from 0 (perpendicular anisotropy) to $π/2$ (parallel anisotropy) within some range of $p$. The shape of $\Emin (p)$ suggests that the quantum well becomes phase separated with regions containing low hole concentrations and perpendicular moments interspersed with other regions containing high hole concentrations and parallel moments. However, due to the Coulomb energy cost associated with phase separation, the true magnetic state in the transition region is canted with $0 < θ< π/2$.
description: 4 figures
L’evento educativo: uno sguardo pedagogico al “pensiero indipendente” di Hannah Arendt
Creators: name: Ilardo, Marta
Publisher: name: Studi sulla Formazione
Year: 2014

description: The article aims at seeking the possible connection between Hannah Arendt’s thought and a few categories of the “pedagogical problematicism”. Key Concepts like Evil, Action and “Vita Activa” are investigated in relation to the “educational event” and its implications for the pedagogical reflection.
description: Studi sulla Formazione, Anno XVII, I-2014
Analytic Expressions for Orbital Angular Momentum Modal Crosstalk in a Slightly Elliptical Fiber
Creators: name: Bhandari, Ramesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Assuming weakly guiding approximation, we examine orbital angular momentum (OAM) mode mixing on account of ellipticity in a fiber and derive a complete set of analytic expressions for spatial crosstalk, using scalar perturbation theory that incorporates fully the existing degeneracy between a spatial OAM mode and its degenerate partner characterized by a topological charge of opposite sign. These expressions, consequently, include an explicit formula for calculating the 2 pi walk-off length over which an input OAM mode converts into its degenerate partner, and back into itself. We further explore the applicability of the derived expressions in the presence of spin-orbit interaction. The expressions constitute a useful mathematical tool in the analysis and design of fibers for spatially-multiplexed mode transmissions. Their utility is demonstrated with application to a few mode and a multimode step-index fiber.
description: 19 pages, 5 figures; published in IEEE Photonics Journal (see below)
Ο νευρικός έλεγχος των αναπνευστικών μυών των ολομετάβολων εντόμων κατά την μεταμόρφωση
Creators: name: Ζαφειρίδου, Γεωργία Β.
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Αναπνοή/νευρικός έλεγχος
Αναπνευστικά κέντρα
Αναπνευστικοί μυς
Κινητικοί νευρώνες
Respiration/neuronal control
Respiratory central pattern generators
Respiratory muscles
Motoneurones

description: Κατά την διάρκεια της συγκεκριμένης εργασίας διερευνήθηκε η αναπνευστική λειτουργία δύο διαφορετικών ειδών εντόμων, της μέλισσας A. mellifera και του κολεόπτερου T. molitor. Aρχικά διερευνήθηκε η μορφολογία και ιστολογία του νευριμυϊκού συστήματος της κοιλίας και της μέλισσας καθώς οι μυς της περιοχής αυτής παίζουν τον σπουδαιότερο ρόλο στην επίτευξη των αναπνευστικών κινήσεων. Στη συνέχεια το ενδιαφέρον επικεντρώθηκε στην ηλεκτροφυσιολογική μελέτη του κοιλιακού νευρομυϊκού συστήματος τόσο της A. mellifera όσο και του T. molitor και στον έλεγχο της αναπνευστικής λειτουργίας από το Κ.Ν.Σ. Η μελέτη αυτή πραγματοποιήθηκε με διάφορες μεθόδους οι οποίες αποκάλυψαν ένα χαρακτηριστικό ρυθμικό αναπνευστικό πρότυπο το οποίο ταυτίζεται με τις αναπνευστικές κινήσεις της κοιλίας των δύο εντόμων. Η αναπνευστική αυτή λειτουργία διαπιστώθηκε ότι ελέγχεται από αναπνευστικά κέντρα που συνάπτουν μέσω νικοτινικών συνάψεων με τους αναπνευστικούς κινητικούς νευρώνες. Τέλος στο 3ο μέρος διερευνήθηκε η διαφοροποίηση του αναπνευστικού προτύπου κατά την διάρκειά της μεταμόρφωσης των δύο εντόμων και διαπιστώθηκαν έντονες τροποποιήσεις κατά το νυμφικό στάδιο
description: In the present study, the respiratory activity of the honeybee A. mellifera and the beetle T. molitor, was investigated. At the first part of the study, the structure and organization of the meuromuscular sustem of the honeybee agdomen, was illustrated, as the muscles of this region play the most important role in the achievement of the respiratory movements. The second part was focused on the electrophysiological study of the neuromuscular system of the honeybee and the beetle and the way the CNS drives respiratory activity. At this part of the study, several methods revealed a typical rhythmic respiratory pattern idential to the respiratory movements of the insects abdomen. This respiratory activity was controled by respiratory CPG's that drive motoneurones activity via nicotinic synapses. Finally at the third of the study, the differentiation of the respiratory behaviour, during metamorphosis, was investigated. This study has shown drastic changes during the pural stage
Gramsci e il movimento per l’educazione nuova. Alcuni spunti di riflessione
Creators: name: Martinez, Daniele
Publisher: name: Studi sulla Formazione
Year: 2014

description: This paper traces the considerations of Gramsci about the New Education Movement. We have analyzed the relationships between the Educational Activism and the Gramsci’s work. In particular we evaluated similarities and differences with the Pragmatism of Dewey, with the Educational Spontaneism, inspired by the tradition of Rousseau, and with the Italian Neo-idealist Pedagogy represented by the figure of Lombardo Radice. In conclusion, in the history of the italian school after the Second World War, we examined the mean- ing of the position of Gramsci and Educational Activism.
description: Studi sulla Formazione, Anno XVII, I-2014
Measurement of Angular Distributions of Drell-Yan Dimuons in p + d Interaction at 800 GeV/c
Creators: name: Zhu, L. Y.
name: Peng, J. C.
name: Reimer, P. E.
name: Awes, T. C.
name: Brooks, M. L.
name: Brown, C. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report a measurement of the angular distributions of Drell-Yan dimuons produced using an 800 GeV/c proton beam on a deuterium target. The muon angular distributions in polar angle $θ$ and azimuthal angle $ϕ$ have been measured over the kinematic range $4.5 < m_{μμ} < 15$ GeV/c$^2$, $0 < p_T < 4 $ GeV/c, and $0 < x_F < 0.8$. No significant cos$2ϕ$ dependence is found in these proton-induced Drell-Yan data, in contrast to the situation for pion-induced Drell-Yan. The data are compared with expectations from models which attribute the cos$2ϕ$ distribution to a QCD vacuum effect or to the presence of the transverse-momentum-dependent Boer-Mulders structure function $h_1^\perp$. Constraints on the magnitude of the sea-quark $h_1^\perp$ structure functions are obtained.
description: 4 pages, 3 figures
La didattica delle passioni. Peculiarità e paradossi del tea- tro gesuita delle origini1
Creators: name: Salvarani, Luana
Publisher: name: Studi sulla Formazione
Year: 2014

description: The article considers the pedagogical function of the Jesuit theatre of the origins. Speaching about the “didactics of passions”, the article catches the significant role of theatre to “show” and to “form” passions.
description: Studi sulla Formazione, Anno XVII, I-2014
ENRESSH Policy Brief Societal Impact
Creators: name: Ochsner, Michael
name: Hope Bulaitis, Zoe
name: Balaban, Corina
name: Castro- Martínez, Elena
name: Daniel, Ondřej
name: Gedutis, Aldis
name: Giménez-Toledo, Elea
name: Iseli, Marlène
name: de Jong, Stefan
name: Ma, Lai
name: Mañana-Rodríguez, Jorge
name: Muhonen, Reeta
name: Olmos- Peñuela, Julia
name: Peruginelli, Ginevra
name: Sigurðarson, Eiríkur Smári
name: Šima, Karel
name: Spaapen, Jack
name: Vanholsbeeck, Marc
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 441007
subject: Sociology and social studies of science and technology
classificationCode: 480403
subject: Law and humanities
classificationCode: 500206
subject: History and philosophy of the social sciences

description: Societal impact has not often been systematically included in research evaluation procedures. Where societal impact is included in research evaluation, it is often defined in a restrictive way relating exclusively to directly measurable economic returns. This limitation is especially important for research, which does not aim to generate direct profits but interacts with, adds value to, and makes sense of, society.This policy brief presents ten recommendations for the evaluation of societal impact with a special focus on how its evaluation can better facilitate research. These recommendations are based on the findings of a long-term multi-country project examining the interactions and roles of research and society across Europe with a special focus on the social sciences and humanities (SSH). Country case studies, conceptual analyses, and policy perspectives are presented in the edited volume “Accountability in Academic Life: European Perspectives on Societal Impact Evaluation” (Edward Elgar, 2023).
Factors influencing the pinworm community (Oxyurida : Nematoda) parasitic in the hindgut of the American cockroach, Periplaneta americana
Creators: name: Noble, Stewart J.
Publisher: name: University of British Columbia
Year: 2010

description: Large cockroaches, such as Periplaneta Americana, typically harbour in their hindgut two or more species of parasitic pinworm (Nematoda: Oxyurida). Our laboratory colony was infected with three, possibly four species. The mechanism(s) permitting the sympatry of these potentially competing species were investigated by: i) repeatedly sampling over time hosts of various size to determine the structure, if any, in the pinworm guild and ii) infecting uninfected hosts with known doses of infective eggs and monitoring population changes via daily host dissections. Results indicate that chemically-mediated intraspecific interference competition maintains pinworm populations at densities well below the apparent carrying capacity of the majority of hosts. The concomitant reduction of interspecific pressures thus permits the cohabitation of multiple pinworm species in what is essentially a single niche. This intraspecific population limitation is likely a response to pressures produced by the large size of the parasite in relation the hindgut of early instar hosts.
Συγκριτική μελέτη συμβατικής χειρουργικής και ακτίνων Laser CO2 για τη θεραπεία καλοήθων και κακοήθων δερματικών βλαβών
Creators: name: Κούππας, Ανδρέας Χ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Ουλές
Θερμική βλάβη
Επούλωση τραύματος
Scars
Thermal damage
Wound healing

description: Στόχος : η παρούσα μελέτη έχει στόχο να διερευνήσει τη χρήση Laser CO2 στην αξαίρεση καλοήθων και κακοήθων βλαβών του δέρματος και των βλεννογόνων έναντι της συμβατικής χειρουργικής. Μεθοδολογία : στη μελέτη χρησιμοποιήθηκαν δύο συσκευές Laser CO2(μία Bowatts και μία 40Watts). Το υλικό της μελέτης αποτελούσαν/3000 ασθενείς με καλοηθείς και κακοηθείς βλάβες του δέρματος και τνω βλεννογόνων. Οι ασθενείς, ανάλογα τη μέθοδο που χρησιμοποιήθηκε, χωριστήκαν σε 4 ομάδες με 450, 2410, 100 και 40 ασθενείς. Στην πρώτη ομάδα έγινε έξαίρεση και βιοψία, στη δεύτερη επεξάχνωση, στην τρίτη απλή εξαίρεση, ενώ στην τέταρτη έγινε εξαίρεση και βιοψία βλαβών του στοματικού βλεννογόνου με συσκευή Laser CO2 40watts, προκειμένου να μελετηθεί η θερμική βλάβη και η επιφανειακή τάση εφελκυσμού στα διάφορα εύρη παλμού(50, 100 & 250mser). Αποτελέσματα και συμπεράσματα : με τη χρήση Laser CO2 επιτυγχάνεται ασφαλής, αναίμακτη και ανώδυνη εξαίρεση της βλάβης ενώ με εύρος παλμού 50msec η τομή είναι όμοια με αυτή της συμβατικής χειρουργικής
description: The aim of this study is to investigate the usefulness of the CO2 Laser in the removal of benign and malignant lesions of the skin and mucosa and compare these results to those using other methods of conventional surgery. Materials and methods : two types of Laser CO2 apparatus were used(80 and 40 watss). Our series consist of three thousand(3.000) patients with benign and malignang lesions of the skin and mucosa. The patients were divided in four froups. In group A(450 patients) lesions were excised and biopsy was considered mandatory. In group b(2410 patients), the lesions were just vaporized with Laser CO2, diathermy or cryosurgery. Group C consisted of 100 patients with papilomatous lesions were excised with Laser CO2 of the buccal mucosa. In group d we studied the healing after treatment with CO2 Laser and the breking stranght of the supeficial scar. Results-conclusion : the use of Laser CO2 was proven safe, painless and bloodless. The closer to the time of thermal relaxation of the tissue lays the pulse duration of the CO2 Laser, the smaller is the thermal damage
Hybrid SDN Evolution: A Comprehensive Survey of the State-of-the-Art
Creators: name: Khorsandroo, Sajad
name: Sanchez, Adrian Gallego
name: Tosun, Ali Saman
name: Rodriguez, Jose' Manuel Arco
name: Doriguzzi-Corin, Roberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Software-Defined Networking (SDN) is an evolutionary networking paradigm which has been adopted by large network and cloud providers, among which are Tech Giants. However, embracing a new and futuristic paradigm as an alternative to well-established and mature legacy networking paradigm requires a lot of time along with considerable financial resources and technical expertise. Consequently, many enterprises can not afford it. A compromise solution then is a hybrid networking environment (a.k.a. Hybrid SDN (hSDN)) in which SDN functionalities are leveraged while existing traditional network infrastructures are acknowledged. Recently, hSDN has been seen as a viable networking solution for a diverse range of businesses and organizations. Accordingly, the body of literature on hSDN research has improved remarkably. On this account, we present this paper as a comprehensive state-of-the-art survey which expands upon hSDN from many different perspectives.
Fermion fractionization and boundary effects in (1 + 1) dimensions
Creators: name: Szabo, Richard Joseph
Publisher: name: University of British Columbia
Year: 2010

description: Fermion number fractionization in quantum field theory on a finite interval is studied for a (1 + 1) dimensional fermion-soliton system with explicit charge conjugation symmetry breaking. The effects of boundary conditions on the fractional fermion number and the connection with the corresponding open space problem are investigated. It is argued that the open space fractional charges can be correctly reproduced from the finite interval results only through a careful definition of what is meant by the soliton charge. This definition of the charge distinguishes between the fermionic and boundary induced charges in the system, and isolates the soliton from possibly other charged topological objects in the system. It therefore gives a true measure of the localized fractional fermion number induced on the soliton of interest. It is then rigorously proven that the corresponding charge fluctuations vanish, and hence that the induced fractional charge on the soliton is a quantum observable.
Prediction of crystal structures and motifs in the Fe-Mg-O system at Earth's core pressures
Creators: name: Wang, Renhai
name: Sun, Yang
name: Wentzcovitch, Renata M.
name: Zheng, Feng
name: Fang, Yimei
name: Wu, Shunqing
name: Lin, Zijing
name: Wang, Cai-Zhuang
name: Ho, Kai-Ming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Fe, Mg, and O are among the most abundant elements in terrestrial planets. While the behavior of the Fe-O, Mg-O, and Fe-Mg binary systems under pressure have been investigated, there are still very few studies of the Fe-Mg-O ternary system at relevant Earth's core and super-Earth's mantle pressures. Here, we use the adaptive genetic algorithm (AGA) to study ternary Fe$_x$Mg$_y$O$_z$ phases in a wide range of stoichiometries at 200 GPa and 350 GPa. We discovered three dynamically stable phases with stoichiometries FeMg$_2$O$_4$, Fe$_2$MgO$_4$, and FeMg$_3$O$_4$ with lower enthalpy than any known combination of Fe-Mg-O high-pressure compounds at 350 GPa. With the discovery of these phases, we construct the Fe-Mg-O ternary convex hull. We further clarify the composition- and pressure-dependence of structural motifs with the analysis of the AGA-found stable and metastable structures. Analysis of binary and ternary stable phases suggest that O, Mg, or both could stabilize a BCC iron alloy at inner core pressures.
description: 9 pages, 8 figures
Il curricolo multiculturale e le competenze di comunicazio- ne interculturale degli insegnanti: riflessioni a partire dal caso brasiliano
Creators: name: Vieira Pizzi, Laura Cristina
name: Galeotti, Glenda
Publisher: name: Studi sulla Formazione
Year: 2014

description: This article proposes a reflection on multicultural curriculum in Brazil and its implications in the relationship between education, identity and citizenship. From these considerations, the reflection continuies on the training of teachers working in multicultural contexts, with a specific focus on their intercultural communicative skills. The analysis relies, in particular, on the contributions of cultural and postcolonial pedagogical framework in which, from its origin in the Anglo-Saxon context, engage in unmask hegemonic tendencies of certain policies, models and educational practices, which for years have been prevailing in the contexts of formal education.
description: Studi sulla Formazione, Anno XVII, I-2014
Economic thermodynamics
Creators: name: Rashkovskiy, Sergey
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences
subject: 80A05, 80-10, 91B80, 91B50

description: A thermodynamic approach to the description of economic systems and processes is developed. It is shown that there is a deep analogy between the parameters of thermodynamic and economic systems (markets); so each thermodynamic parameter can be associated with a certain economic parameter or indicator. The economic meaning of such primordially thermodynamic concepts as internal energy and temperature has been established. It is shown that many economic laws, which in economic theory are a generalization of the results of observations, or are based on the analysis of the psychology of the behavior of market actors, within the framework of economic thermodynamics can be obtained as the natural and formal results of the theory. In particular, we show that economic thermodynamics allows a natural description of such a phenomenon as inflation. The thermodynamic conditions of market equilibrium stability are derived and analyzed, as well as the Le Chatelier's principle as applied to economic systems.
description: 34 pages, 1 figure, 1 table
Μέθοδος αυτόματης αναπαράστασης προθηματοποιημένων και σύνθετων ρημάτων της νέας ελληνικής
Creators: name: Φίστα, Ευαγγελία Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Ηλεκτρονικό μορφολογικό λεξικό
Συντακτική ανάλυση
Αυτόματη ανάλυση φυσικών γλωσσών
Morphological electronic dictionary
Natural language processing
Syntactical analysis

description: Αντικείμενο της παρούσας έρευνας είναι η συστηματική κατασκευή του μορφολογικού ηλεκτρονικού λεξικού των προθηματοποιημένων και σύνθετων(ΠΣΡ) ρημάτων της Νέας Ελληνικής καθώς και η συντακτικο-σημασιολογική περιγραφή ρημάτων του λεξικού-γραμματική της Νέας Ελληνίκής. Απώτερος στόχος είναι η αυτόματη ανάλυση κειμένων της Νέας Ελληνικής με τη χρήση γλωσσικών δεδομένων. Υιοθετήσαμε το μεθοδολογικό πλαίσιο του λεξικού-γραμματικής του οποίου τις βάσεις έθεσε ο M. Gross(1975). Το πλαίσιο αυτό στηρίζεται στις θεωρητικές αρχές της μετασχηματιστικής γραμματικής του Z.S. Harris(1951, 1968). Συγκεκριμένα, στο μορφολογικό επίπεδο διερευνήσαμε την παραγωγικότητα των προθημάτων παρα-, ξε-, συν και του α' συνθετικού ξανα- με τα μορφολογικά ρήματα. Για τη μορφολογική κωδικοποίηση ακολουθήσαμε το φορμαλισμό του συστήματος DELA του LADL. Στο συντακτικό επίπεδο, μελετήσαμε την ιδιαιτερότητα των ΠΣΡ με τα προαναφερθέντα προθήματα και ταξινομήσαμε -970 ρήματα στους πίνακες του λεξικού-γραμματικής της Νέας Ελληνικής. Τέλος, προτείναμε μέθοδο αυτόματης αναπαράστασης των ΠΡΣ και εφαρμόσαμε τα γλωσσικά δεδομένα μας, μορφολογικά και συντακτικά, σε σώματα κειμένων της Νέας Ελληνικής
description: The subject of this research is the systematic construction of the morphological electronic dictionary of the prefixed verbs(PVs) of Modern Greek well as the syntactico-semantic description of the PVs that are formed some verb categories of the Modern Greek Lexicon-Grammar(L-G). The L-G methodological framework adopted in this research has been developed by M. Gross(1975) and elaborated at the LADL(Laboratoire d' Automatique Documentaire et Linguistique) in the Universtity of llarne-la-Vallee. In the first part, we have analyzed the productivity of the profixes παρα-, ξε-, συν-, and ξανα- by morphologically simple verbs. In addition, we have developed an original method for the construction of them inflected forms. In the syntacical part, we present the specifities of the PVs with the prefixes(παρα-, ξε-, συν-, and ξανα-), already mentioned above, which are formed from 8 tables of the Modern Greek Lexicon-Grammar. The linguistic data(both morphological and syntactical) presented in this research are both numerous and precise in terms of quality and can be used linguistic software for the automatic analysis of written texts
The sum rules for the spin dependent structure functions $g_1$ in the isovector reaction
Creators: name: Koretune, Susumu
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the isovector reaction, the sum rule for the spin dependent function $g_1$ which is related to the cross section of the photoproduction is derived. In the small $Q^2$ region, the sum rule is dominated by the low energy contribution and it tightly connects the resonance, the elastic, and the non-resonant contributions.
description: Eq.(9) is corrected. The correction is minor and does not affect the disscusion and the conclusion in the paper
Variation of Broad Emission Lines from QSOs with Optical/UV Periodicity to Test the Interpretation of Supermassive Binary Black Holes
Creators: name: Ji, Xiang
name: Lu, Youjun
name: Ge, Junqiang
name: Yan, Changshuo
name: Song, Zihao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Periodic quasars have been suggested to host supermassive binary black holes (BBHs) in their centers, and their optical/UV periodicities are interpreted as caused by either the Doppler-boosting (DB) effect of continuum emission from the disk around the secondary black hole (BH) or intrinsic accretion rate variation. However, no other definitive evidence has been found to confirm such a BBH interpretation(s). In this paper, we investigate the responses of broad emission lines (BELs) to the continuum variations for these quasars under two BBH scenarios, and check whether they can be distinguished from each other and from that of a single BH system. We assume a simple circumbinary broad-line region (BLR) model, compatible with BLR size estimates, with a standard $Γ$ distribution of BLR clouds. We find that BELs may change significantly and periodically under the BBH scenarios due to (1) the position variation of the secondary BH and (2) the DB effect, if significant, and/or intrinsic variation, which is significantly different from the case of a single BH system. For the two BBH scenarios, the responses of BELs to (apparent) continuum variations, caused by the DB effect or intrinsic rate variation, are also significantly different from each other, mainly because the DB effect has a preferred direction along the direction of motion of the secondary BH, while that due to intrinsic variation does not. Such differences in the responses of BELs from different scenarios may offer a robust way to distinguish different interpretations of periodic quasars and to identify BBHs, if any, in these systems.
description: 16 pages, 13 figures, accepted for publication in ApJ
Positron Annihilations at the Galactic Center: Generating More Questions Than Answers
Creators: name: Yuksel, Hasan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The bulge of our Galaxy is illuminated by the 0.511 MeV gamma-ray line flux from annihilations of nonrelativistic positrons. The emission is strongly concentrated at the Galactic Center, in contrast to gamma-ray maps tracing nucleosynthesis (e.g., the 1.809 MeV line from decaying ^26Al) or cosmic ray processes (e.g., the 1-30 MeV continuum), which reveal a bright disk with a much less prominent central region. If positrons are generated at relativistic energies, higher-energy gamma rays will also be produced from inflight annihilation of positrons on ambient electrons. The comparison of the gamma-ray spectrum from inflight annihilation to the observed diffuse Galactic gamma-ray data constrains the injection energies of Galactic positrons to be less than 3 MeV.
description: To be published in the proceedings of the 7th international UCLA symposium on sources and detection of dark matter and dark energy in the universe (DM 2006) 2006, Marina del Rey, California, 22-24 Feb 2006
ENRESSH Brief Societal Impact
Creators: name: Ochsner, Michael
name: Hope Bulaitis, Zoe
name: Balaban, Corina
name: Castro- Martínez, Elena
name: Daniel, Ondřej
name: Gedutis, Aldis
name: Giménez-Toledo, Elea
name: Iseli, Marlène
name: de Jong, Stefan
name: Ma, Lai
name: Mañana-Rodríguez, Jorge
name: Muhonen, Reeta
name: Olmos- Peñuela, Julia
name: Peruginelli, Ginevra
name: Sigurðarson, Eiríkur Smári
name: Šima, Karel
name: Spaapen, Jack
name: Vanholsbeeck, Marc
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 441007
subject: Sociology and social studies of science and technology
classificationCode: 480403
subject: Law and humanities
classificationCode: 500206
subject: History and philosophy of the social sciences

description: Societal impact has not often been systematically included in research evaluation procedures. Where societal impact is included in research evaluation, it is often defined in a restrictive way relating exclusively to directly measurable economic returns. This limitation is especially important for research, which does not aim to generate direct profits but interacts with, adds value to, and makes sense of, society.This policy brief presents ten recommendations for the evaluation of societal impact with a special focus on how its evaluation can better facilitate research. These recommendations are based on the findings of a long-term multi-country project examining the interactions and roles of research and society across Europe with a special focus on the social sciences and humanities (SSH). Country case studies, conceptual analyses, and policy perspectives are presented in the edited volume “Accountability in Academic Life: European Perspectives on Societal Impact Evaluation” (Edward Elgar, 2023).
Penetration depth of low-coherence enhanced backscattered light in sub-diffusion regime
Creators: name: Subramanian, Hariharan
name: Pradhan, Prabhakar
name: Kim, Young
name: Backman, Vadim
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The mechanisms of photon propagation in random media in the diffusive multiple scattering regime have been previously studied using diffusion approximation. However, similar understanding in the low-order (sub-diffusion) scattering regime is not complete due to difficulties in tracking photons that undergo very few scatterings events. Recent developments in low-coherence enhanced backscattering (LEBS) overcome these difficulties and enable probing photons that travel very short distances and undergo only a few scattering events. In LEBS, enhanced backscattering is observed under illumination with spatial coherence length L_sc less than the scattering mean free path l_s. In order to understand the mechanisms of photon propagation in LEBS in the subdiffusion regime, it is imperative to develop analytical and numerical models that describe the statistical properties of photon trajectories. Here we derive the probability distribution of penetration depth of LEBS photons and report Monte Carlo numerical simulations to support our analytical results. Our results demonstrate that, surprisingly, the transport of photons that undergo low-order scattering events has only weak dependence on the optical properties of the medium (l_s and anisotropy factor g) and strong dependence on the spatial coherence length of illumination, L_sc, relative to those in the diffusion regime. More importantly, these low order scattering photons typically penetrate less than l_s into the medium due to low spatial coherence length of illumination and their penetration depth is proportional to the one-third power of the coherence volume (i.e. [l_s πL_sc^2 ]^1/3).
description: 32 pages(including 7 figures), modified version to appear in Phys. Rev. E
NS-NS Spacetimes from Amplitudes
Creators: name: Monteiro, Ricardo
name: Nagy, Silvia
name: O'Connell, Donal
name: Veiga, David Peinador
name: Sergola, Matteo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recent work has shown how on-shell three-point amplitudes in gauge theory and gravity, representing the coupling to massive particles, correspond in the classical limit to the curvature spinors of linearised solutions. This connection, made explicit via the KMOC formalism in split metric signature, turns the double copy of scattering amplitudes into the double copy of classical solutions. Here, we extend this framework to the universal massless sector of supergravity, which is the complete double copy of pure gauge theory. Our extension relies on a Riemann-Cartan curvature incorporating the dilaton and the B-field. In this setting, we can determine the most general double copy arising from the product of distinct gauge theory solutions, say a dyon and $\sqrt{\text{Kerr}}$. This gives a double-copy interpretation to gravity solutions of the type Kerr-Taub-NUT-dilaton-axion. We also discuss the extension to heterotic gravity. Finally, we describe how this formalism for the classical double copy relates to others in the literature, namely (i) why it is an on-shell momentum space analogue of the convolutional prescription, and (ii) why a straightforward prescription in position space is possible for certain vacuum solutions.
description: 41 pages + appendices, 2 pdf figures. v2: minor changes, published version
The conformal anomaly of k-strings
Creators: name: Giudice, Pietro
name: Gliozzi, Ferdinando
name: Lottini, Stefano
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Simple scaling properties of correlation functions of a confining gauge theory in d-dimensions lead to the conclusion that k-string dynamics is described, in the infrared limit, by a two-dimensional conformal field theory with conformal anomaly c=(d-2)T_k/T_1, where T_k is the k-string tension. This result applies to any gauge theory with stable k-strings. We check it in a 3D Z_4 gauge model at finite temperature, where a string effect directly related to c can be clearly identified.
description: 12 pages, 7 figures
Optimized ensemble deep learning framework for scalable forecasting of dynamics containing extreme events
Creators: name: Ray, Arnob
name: Chakraborty, Tanujit
name: Ghosh, Dibakar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The remarkable flexibility and adaptability of both deep learning models and ensemble methods have led to the proliferation for their application in understanding many physical phenomena. Traditionally, these two techniques have largely been treated as independent methodologies in practical applications. This study develops an optimized ensemble deep learning (OEDL) framework wherein these two machine learning techniques are jointly used to achieve synergistic improvements in model accuracy, stability, scalability, and reproducibility prompting a new wave of applications in the forecasting of dynamics. Unpredictability is considered as one of the key features of chaotic dynamics, so forecasting such dynamics of nonlinear systems is a relevant issue in the scientific community. It becomes more challenging when the prediction of extreme events is the focus issue for us. In this circumstance, the proposed OEDL model based on a best convex combination of feed-forward neural networks, reservoir computing, and long short-term memory can play a key role in advancing predictions of dynamics consisting of extreme events. The combined framework can generate the best out-of-sample performance than the individual deep learners and standard ensemble framework for both numerically simulated and real world data sets. We exhibit the outstanding performance of the OEDL framework for forecasting extreme events generated from Lienard-type system, prediction of COVID-19 cases in Brazil, dengue cases in San Juan, and sea surface temperature in Nino 3.4 region.
description: 14 pages, 8 figures, any comments are welcome
Nonlocal properties of entangled two-photon generalized binomial states in two separate cavities
Creators: name: Franco, R. Lo
name: Compagno, G.
name: Messina, A.
name: Napoli, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider entangled two-photon generalized binomial states of the electromagnetic field in two separate cavities. The nonlocal properties of this entangled field state are analyzed by studying the electric field correlations between the two cavities. A Bell's inequality violation is obtained using an appropriate dichotomic cavity operator, that is in principle measurable.
description: 5 pages, 1 figure
Συσχέτιση της αναπνευστικής λειτουργίας με τις κινητικές διαταραχές και την ποιότητα ζωής σε ασθενείς με παρκινσονισμό: μακροχρόνια μελέτη
Creators: name: Κακαβέλας, Πασχάλης
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Παρκινσονισμό
Αέρια αίματος
Στοματικές πιέσεις
Τρόμος
Βραδυκινησία
Δυσκαμψία
Tremor
Bradykinesia
Dyskinesia

description: Σκοπός της μελέτης είναι η διερεύνηση της αναπνευστικής λειτουργίας σε ασθενείς με νόσο Parkinson και συσχέτιση αυτής με την κλινική συμπτωματολογία και την ποιότητα ζωής των ασθενών αυτών. Μελετήθηκαν 56 ασθενείς. Εγινε έλεγχος της αναπνευστικής λειτουργίας(αέρια αίματος, στοματικές πιέσεις) και συσχετισμός αυτής με το στάδιο της νόσου και τη βαρύτητα της βάσης της κλίμακας UPDRS. Ελέγχθηκε κατά πόσο τα τρία κύρια χαρακτηριστικά της νόσου(τρόμος, βραδυκινησία, δυσκαμψία) επηρεάζουν την αναπνευστική λειτουργία των ασθενών. Ο ίδιος έλεγχος έγινε και τρία χρόνια μετά την πρώτη εξέταση. Τέλος καταγράφηκε και αξιολογήθηκε η ποιότητα ζωής των ασθενών κατά την πρώτη εξέταση. Βρέθηκε ότι το στάδιο της νόσου επηρεάζει στις μικρές αεροφόρους οδούς. Επίσης η επιδείνωση του σταδίου και της βαρύτητας της νόσου επηρεάζει τις μικρές και μεγάλες αεροφόρους οδούς. Η επιδείνωση της δυσκαμψίας και της βραδυκινησίας επηρεάζει τις μικρές και μεγάλες αεροφόρους. Τέλος, η ποιότητα ζωής των ασθενών με νόσο Parkinson είναι σαφώς επιδεινωμένη σε σχέση με υγιείς μάρτυρες σε σχέση με υγιείς μάρτυρες
description: Aim of the study was to investigate respiratory function of patiente with PD and its correlation with clinical symproms and their quality of life. Especially we compare the three main motor symptoms of the disease(tremor, bradykinesia, dyskinesia)with respiratory function paramenters and we compare then with the stage of the disease. In three years we follow up these patients some were able to compare disease aggregation with respiratory function. Special questionnaires were used in order to evaluate quality of life of these patients during the first examination. The severity of illness affected the respiratory function in small and large airways. The correlation of sf 36 dimensions between patients suffering from Parkinson and healthy individuals, demonstrated influence of the disease in general health, role functional and functional capability
Exploring the flavour structure of the MSSM with rare K decays
Creators: name: Isidori, Gino
name: Mescia, Federico
name: Paradisi, Paride
name: Smith, Christopher
name: Trine, Stephanie
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present an extensive analysis of rare K decays, in particular of the two neutrino modes K+->pi+ nu nu-bar and KL->pi0 nu nu-bar, in the Minimal Supersymmetric extension of the Standard Model. We analyse the expectations for the branching ratios of these modes, both within the restrictive framework of the minimal flavour violation hypothesis and within a more general framework with new sources of flavour-symmetry breaking. In both scenarios, the information that can be extracted from precise measurements of the two neutrino modes turn out to be very useful in restricting the parameter space of the model, even after taking into account the possible information on the mass spectrum derived from high-energy colliders, and the constraints from B-physics experiments. In the presence of new sources of flavour-symmetry breaking, additional significant constraints on the model can be derived also from the two KL->pi0 l+l- modes.
description: 22 pages, 10 figures (high quality figures available on request)
An ALMA Survey of Protoplanetary Disks in Lynds 1641
Creators: name: Grant, Sierra L.
name: Espaillat, Catherine C.
name: Wendeborn, John
name: Tobin, John J.
name: Macías, Enrique
name: Rilinger, Anneliese
name: Ribas, Álvaro
name: Megeath, S. Thomas
name: Fischer, William J.
name: Calvet, Nuria
name: Kim, Kyoung Hee
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present ALMA observations of 101 protoplanetary disks within the star-forming region Lynds 1641 in the Orion Molecular Cloud A. Our observations include 1.33 mm continuum emission and spectral windows covering the J=2-1 transition of $^{12}$CO, $^{13}$CO, and C$^{18}$O. We detect 89 protoplanetary disks in the dust continuum at the 4$σ$ level ($\sim$88% detection rate) and 31 in $^{12}$CO, 13 in $^{13}$CO, and 4 in C$^{18}$O. Our sample contains 23 transitional disks, 20 of which are detected in the continuum. We target infrared-bright Class II objects, which biases our sample towards massive disks. We determine dust masses or upper limits for all sources in our sample and compare our sample to protostars in this region. We find a decrease in dust mass with evolutionary state. We also compare this sample to other regions surveyed in the (sub-)millimeter and find that Lynds 1641 has a relatively massive dust disk population compared to regions of similar and older ages, with a median dust mass of 11.1$^{+32.9}_{-4.6}$ $M_\oplus$ and 27% with dust masses equal to or greater than the minimum solar nebula dust mass value of $\sim$30 $M_\oplus$. We analyze the disk mass-accretion rate relationship in this sample and find that the viscous disk lifetimes are similar to the age of the region, however with a large spread. One object, [MGM2012] 512, shows large-scale ($>$5000 AU) structure in both the dust continuum and the three gas lines. We discuss potential origins for this emission, including an accretion streamer with large dust grains.
description: 21 pages, 15 figures, 3 tables
Οικολογικός σχεδιασμός μονάδων παραγωγής ηλεκτρικής ενέργειας
Creators: name: Θεοδοσίου, Γιώργος Μ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Ανάλυση κύκλου ζωής
Παραγωγή ηλεκτρικής ενέργειας
Πολυκριτηριακή βελτιστοποίηση
Life-cycle analysis
Multiobjective optimization
Electricity generation

description: Βασικοί στόχοι της εργασίας είναι α)η περιβαλλοντική αξιολόγηση των μονάδων παραγωγής ηλεκτρισμού και του κύκλου ζωής των ενεργειακών πόρων που χρησιμοποιούνται για το σκοπό αυτό και η αναγνώριση και καταγραφή της συνεισφοράς τους στο πρόβλημα της ρύπανσης του περιβάλλοντος, και β)η δημιουργία μιας διαδικασίας βελτιστοποίησης του σχεδιασμού ενεργειακών συστημάτων η οποία θα έχει ως βασικό σκοπό να ενσωματώσει την περιβαλλοντική παράμετρο στο συμβατικό σχεδιασμό, παράλληλα με τα άλλα στοιχεία που το χαρακτηρίζουν συνεισφέροντας έτσι στην προσπάθεια για τη μείωση των περιβαλλοντικών επιπτώσεων που προκύπτουν από τον τομέα παραγωγής ηλεκτρισμού. Για την επίτευξη των στόχων αυτών δημιουργήθηκε ένα μοντέλο πολυκροτηριακής βελτιστοποίησης ενεργειακών συστημάτων παραγωγής ηλεκτρισμού ή/και θερμότητας στο οποίο μέσω της Φιλοσοφίας Οικολογικού Σχεδιασμού και της Ανάλυσης Κύκλου Ζωής(ΑΚΖ) μεθοδολογίας κατάλληλης για την περιβαλλοντική αξιολόγηση ενεργειακών συστημάτων, ενσωματώνεται η περιβαλλοντική πτυχή στο συμβατικό σχεδιασμό. Τα δεδομένα από την ΑΚΖ και τα αντίστοιχα από μια οικονομική ανάλυση συνδυάζονται και με τη χρήση της προσέγγισης της πολυκριτηριακής ανάλυσης, με παράλληλη ελαχιστοποίηση των αντικειμενικών συναρτήσεων κόστους και περιβαλλοντικών επιπτώσεων που υπόκεινται σε συγκεκριμένους περιορισμούς προκύπτει ένα σύνολο από βέλτιστη λύση σχεδιασμού ενεργειακών συστημάτων
description: The basic goals of this study are a)the environmental evaluation of power generation plants and of the life cycle of the energy sources used for this purpose and the problem of environmental pollution and b)the development of an energy systems design optimization procedure that will aim at incorporation of the environmental apsects in the conventional design, along with the other parameters that describe it, contributing in this way to the efforts towards the minimization of the environmental impacts associates with the power generation sector. In order to achieve these these goals, a multiobjective otpimization model has been developed for the design of energy systems, in which through the eco-design concept and the Life Cylce Analysis(LCA) methodology-a methodology that is suitable for the environmental evaluation of energy systems. The environmental aspect is incorporated in the conventional deign. The data resulting both from the LCA andfrom an economic analysis are combined and through the use of the Multicriteria Analysis approach, with simultaneous minimization of both the cost and the environmental impacts objective functions subjected to a number of specific constrains, a set of feasible optimum energy systems design options is obtained
Unusual dynamic susceptibility arising from soft ferromagnetic domains in MnBi8Te13 and Sb-doped MnBi2nTe3n+1 (n=2, 3)
Creators: name: Hu, Chaowei
name: Tanatar, Makariy A.
name: Prozorov, Ruslan
name: Ni, Ni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: MnBi2nTe3n+1(MBT) is the first intrinsic magnetic topological insulator and is promising to hostemergent phenomena such as quantum anomalous Hall effect. They can be made ferromagnetic by having n >= 4 or with Sb doping. We studied the magnetic dynamics in a few selected ferromag-netic (FM) MBT compounds, including MnBi8Te13and Sb doped MnBi2nTe3n+1(n= 2,3) usingAC susceptibility and magneto-optical imaging. Slow relaxation behavior is observed in all threecompounds, suggesting its universality among FM MBT. We attribute the origin of the relaxationbehavior to the irreversible domain movements since they only appear below the saturation fieldswhen ferromagnetic domains form. The very soft ferromagnetic domain nature is revealed by thelow-field fine-structured domains and high-field sea-urchin-shaped remanent-state domains imagedvia our magneto-optical measurements. Finally, we ascribe the rare "double-peak" behavior ob-served in the AC susceptibility under small DC bias fields to the very soft ferromagnetic domainformations.
description: 5 figures
Conductance Quantization in Schottky-gated Si/SiGe Quantum Point Contacts
Creators: name: Scappucci, G.
name: Di Gaspare, L.
name: Giovine, E.
name: Notargiacomo, A.
name: Leoni, R.
name: Evangelisti, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on the fabrication and electronic transport characterisation of Schottky-gated strongly confined Si/SiGe quantum point contacts (QPC). At zero magnetic field and T=450mK the QPC conductance as a function of gate voltage shows a quantization in units of e^2/h, indicative of transport through 1D modes which appear to lack both spin and valley degeneracy.
description: 2 pages, 2 figure, to be published in Proc. ICPS-28
Transfer Learning for Passive Sonar Classification using Pre-trained Audio and ImageNet Models
Creators: name: Mohammadi, Amirmohammad
name: Kelhe, Tejashri
name: Carreiro, Davelle
name: Van Dine, Alexandra
name: Peeples, Joshua
Publisher: name: Zenodo
Year: 2024
Subjects: deep learning
transfer learning
underwater acoustic target recognition

description: Transfer learning is commonly employed to leverage large, pre-trained models and perform fine-tuning for downstream tasks. The most prevalent pre-trained models are initially trained using ImageNet. However, their ability to generalize can vary across different data modalities. This study compares pre-trained Audio Neural Networks (PANNs) and ImageNet pre-trained models within the context of underwater acoustic target recognition (UATR). It was observed that the ImageNet pre-trained models slightly out-perform pre-trained audio models in passive sonar classification. We also analyzed the impact of audio sampling rates for model pre-training and fine-tuning. This study contributes to transfer learning applications of UATR, illustrating the potential of pre-trained models to address limitations caused by scarce, labeled data in the UATR domain.
description: DISTRIBUTION STATEMENT A. Approved for public release. Distribution is unlimited. This material is based upon work supported by the Under Secretary of Defense for Research and Engineering under Air Force Contract No. FA8702-15-D-0001. Any opinions, findings, conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the Under Secretary of Defense for Research and Engineering. 2024 Massachusetts Institute of Technology. Delivered to the U.S. Government with Unlimited Rights, as defined in DFARS Part 252.227-7013 or 7014 (Feb 2014). Notwithstanding any copyright notice, U.S. Government rights in this work are defined by DFARS 252.227-7013 or DFARS 252.227-7014 as detailed above. Use of this work other than as specifically authorized by the U.S. Government may violate any copyrights that exist in this work