cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A novel energy resolved neutron imaging detector based on TPX3Cam for the CSNS
Creators: name: Yang, Jianqing
name: Zhou, Jianrong
name: Jiang, Xingfen
name: Tan, Jinhao
name: Zhang, Lianjun
name: Zhou, Jianjin
name: Zhou, Xiaojuan
name: Yang, Wenqin
name: Xia, Yuanguang
name: Chen, Jie
name: Sun, XinLi
name: Zhang, Quanhu
name: Sun, Zhijia
name: Chen, Yuanbo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The China Spallation Neutron Source (CSNS) operates in pulsed mode and has a high neutron flux. This provides opportunities for energy resolved neutron imaging by using the TOF (Time Of Flight) approach. An Energy resolved neutron imaging instrument (ERNI) is being built at the CSNS but significant challenges for the detector persist because it simultaneously requires a spatial resolution of less than 100 μm, as well as a microsecond-scale timing resolution. This study constructs a prototype of an energy resolved neutron imaging detector based on the fast optical camera, TPX3Cam coupled with an image intensifier. To evaluate its performance, a series of proof of principle experiments were performed in the BL20 at the CSNS to measure the spatial resolution and the neutron wavelength spectrum, and perform neutron imaging with sliced wavelengths and Bragg edge imaging of the steel sample. A spatial resolution of 57 μm was obtained for neutron imaging by using the centroiding algorithm, the timing resolution was on the microsecond scale and the measured wavelength spectrum was identical to that measured by a beam monitor. In addition, any wavelengths can be selected for the neutron imaging of the given object, and the detector can be used for Bragg edge imaging. The results show that our detector has good performances and can satisfy the requirements of ERNI for detectors at the CSNS
Gender, (Dis)Embodiment, and the Image of A.I. and Robot in Spike Jonze’s Her and Alex Garland’s Ex Machina
Creators: name: Μαυρίδου, Ιωάννα Θεοφάνης
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Φύλο
(Από)Σωματοποίηση
Κινηματογράφος
Gender
(Dis)Embodiment
Cinema

description: The present thesis aims at investigating the representation of artificial intelligence and of the robot as characters, as well as the impact of these (dis)embodied machines on the human society in two cinematic narratives. The proliferation of advanced technologies in the 21st-century Western world and the interdependence of human beings and machines are insightfully explored in Spike Jonze's Her (2013) and in Alex Garland's Ex Machina (2015). Both Jonze and Garland are contemporary Anglo-American scriptwriters and directors who are interested in the co-existence of humans and machines as an inevitable feature of the technologically saturated human society. However, neither Jonze nor Garland embrace a transhumanist vision of the world in their movies. On the contrary, both of them underline the possibility of the co-existence of two different entities occupying the same environment, while pointing out the latent ideological assumptions about gender relations which evidently inform the human-to-machine interaction. One cannot fail to notice that both Jonze’s and Garland’s films have a male character as the main representative of humankind and a feminized machine as a stand-in for womanhood.
description: Σκοπός της παρούσας διπλωματικής εργασίας είναι να διερευνήσει την απεικόνιση της τεχνητής νοημοσύνης και του ρομπότ ως χαρακτήρες, καθώς επίσης και τον αντίκτυπο των (απο)σωματοποιημένων μηχανών στην ανθρώπινη κοινωνία σε δύο κινηματογραφικά αφηγήματα. Η ταχύτατη εξάπλωση καινοτόμων τεχνολογιών στο δυτικό κόσμο του 21ου αιώνα και η αλληλοεξάρτηση ανθρώπων και μηχανών βρίσκονται στο επίκεντρο του «Δικός της» του Σπάικ Τζονζ (2013) και του «Από μηχανής» του Άλεξ Γκάρλαντ (2015). Τόσο ο Τζονζ όσο και ο Γκάρλαντ είναι δύο Αγγλο-Αμερικάνοι σεναριογράφοι και σκηνοθέτες με έκδηλο ενδιαφέρον για την συνύπαρξη ανθρώπων και μηχανών ως ένα αναπόσπαστο κομμάτι της τεχνολογικά διαποτισμένης σύγχρονης ανθρώπινης κοινωνίας. Ωστώσο, ούτε ο Τζονζ ούτε ο Γκάρλαντ επιλέγουν να απεικονίσουν στις ταινίες τους την πιθανότητα της υπέρβασης του ανθρώπου από τις μηχανές. Αντιθέτως, και οι δύο σεναριογράφοι/σκηνοθέτες υπογραμμίζουν τη δυνατότητα συνύπαρξης των δύο αυτών διαφορετικών οντότητων που συνυπάρχουν στο ίδιο περιβάλλον, τονίζοντας παράλληλα την υποβόσκουσα ιδεολογία αναφορικά με τις σχέσεις των δύο φύλων, η οποία ολοφάνερα επηρεάζει την αλληλεπίδραση μεταξύ ανθρώπου και ρομπότ.
Cosmological Entropy Bounds
Creators: name: Brustein, Ram
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: I review some basic facts about entropy bounds in general and about cosmological entropy bounds. Then I review the Causal Entropy Bound, the conditions for its validity and its application to the study of cosmological singularities. This article is based on joint work with Gabriele Veneziano and subsequent related research.
description: 50 pages, 4 figures, To appear in ``String theory and fundamental interactions" published in celebration of the 65 birthday of Gabriele Veneziano
Additional file 4 of The RIO trial: rationale, design, and the role of community involvement in a randomised placebo-controlled trial of antiretroviral therapy plus dual long-acting HIV-specific broadly neutralising antibodies (bNAbs) in participants diagnosed with recent HIV infection—study protocol for a two-stage randomised phase II trial
Creators: name: Lee, Ming Jie
name: Collins, Simon
name: Babalis, Daphne
name: Johnson, Nicholas
name: Falaschetti, Emanuela
name: Prevost, A. Toby
name: Ashraf, Ambreen
name: Jacob, Milaana
name: Cole, Tom
name: Hurley, Lisa
name: Pace, Matthew
name: Ogbe, Ane
name: Khan, Maryam
name: Zacharopoulou, Panagiota
name: Brown, Helen
name: Sutherland, Euan
name: Box, Hanna
name: Fox, Julie
name: Deeks, Steven
name: Horowitz, Jill
name: Nussenzweig, Michel C.
name: Caskey, Marina
name: Frater, John
name: Fidler, Sarah
Publisher: name: figshare
Year: 2022
Subjects: subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Additional file 4.
Excess wings and asymmetric relaxation spectra in a facilitated trap model
Creators: name: Scalliet, Camille
name: Guiselin, Benjamin
name: Berthier, Ludovic
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In a recent computer study, we have shown that the combination of spatially heterogeneous dynamics and kinetic facilitation provides a microscopic explanation for the emergence of excess wings in deeply supercooled liquids. Motivated by these findings, we construct a minimal empirical model to describe this physics and introduce dynamic facilitation in the trap model, which was initially developed to capture the thermally-activated dynamics of glassy systems. We fully characterise the relaxation dynamics of this facilitated trap model varying the functional form of energy distributions and the strength of dynamic facilitation, combining numerical results and analytic arguments. Dynamic facilitation generically accelerates the relaxation of the deepest traps, thus making relaxation spectra strongly asymmetric, with an apparent "excess" signal at high frequencies. For well-chosen values of the parameters, the obtained spectra mimic experimental results for organic liquids displaying an excess wing. Overall, our results identify the minimal physical ingredients needed to describe excess processes in relaxation spectra of supercooled liquids.
description: 11 pages, 9 figures
A Note on q-Deformed Two-Dimensional Yang-Mills and Open Topological Strings
Creators: name: Zhang, Peng
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note we make a test of the open topological string version of the OSV conjecture, proposed in hep-th/0504054, in the toric Calabi-Yau manifold $X= O(-3)\to\mathbf{P}^2$ with background D4-branes wrapped on Lagrangian submanifolds. The D-brane partition function reduces to an expectation value of some inserted operators of a q-deformed Yang-Mills theory living on a chain of $\mathbf{P}^1$'s in the base $\mathbf{P}^2$ of $X$. At large $N$ this partition function can be written as a sum over squares of chiral blocks, which are related to the open topological string amplitudes in the local $\mathbf{P}^2$ geometry with branes at both the outer and inner edges of the toric diagram. This is in agreement with the conjecture.
description: 14 pages, 3 figures
Interplay between magnetic and lattice excitations in BiFeO$_3$
Creators: name: Cazayous, M.
name: Sacuto, A.
name: Lebeugle, D.
name: Colson, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have performed Raman scattering investigations on the high energy magnetic excitations in a BiFeO$_3$ single crystal as a function of both temperature and laser excitation energy. A strong feature observed at 1250 cm$^{-1}$ in the Raman spectra has been previously assigned to two phonon overtone. We show here that its unusual frequency shift with the excitation energy and its asymmetric temperature dependent Fano lineshape reveal a strong coupling to magnetic excitations. In the same energy range, we have also identified the two-magnon excitation with a temperature dependence very similar to $α$-Fe$_2$O$_3$ hematite.
Zoetrope Genetic Programming for Regression
Creators: name: Boisbunon, Aurélie
name: Fanara, Carlo
name: Grenet, Ingrid
name: Daeden, Jonathan
name: Vighi, Alexis
name: Schoenauer, Marc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: The Zoetrope Genetic Programming (ZGP) algorithm is based on an original representation for mathematical expressions, targeting evolutionary symbolic regression.The zoetropic representation uses repeated fusion operations between partial expressions, starting from the terminal set. Repeated fusions within an individual gradually generate more complex expressions, ending up in what can be viewed as new features. These features are then linearly combined to best fit the training data. ZGP individuals then undergo specific crossover and mutation operators, and selection takes place between parents and offspring. ZGP is validated using a large number of public domain regression datasets, and compared to other symbolic regression algorithms, as well as to traditional machine learning algorithms. ZGP reaches state-of-the-art performance with respect to both types of algorithms, and demonstrates a low computational time compared to other symbolic regression approaches.
Next-to-leading order QCD corrections to Z boson pair production via vector-boson fusion
Creators: name: Jager, Barbara
name: Oleari, Carlo
name: Zeppenfeld, Dieter
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Vector-boson fusion processes are an important tool for the study of electroweak symmetry breaking at hadron colliders, since they allow to distinguish a light Higgs boson scenario from strong weak boson scattering. We here consider the channels WW->ZZ and ZZ->ZZ as part of electroweak Z boson pair production in association with two tagging jets. We present the calculation of the NLO QCD corrections to the cross sections for p p -> e+ e- mu+ mu- + 2 jets and p p -> e+ e- nu_mu nubar_mu + 2 jets via vector-boson fusion at order alpha_s alpha^6, which is performed in the form a NLO parton-level Monte Carlo program. The corrections to the integrated cross sections are found to be modest, while the shapes of some kinematical distributions change appreciably at NLO. Residual scale uncertainties typically are at the few percent level.
description: 12 pages, 4 figures
Point Cloud Upsampling and Normal Estimation using Deep Learning for Robust Surface Reconstruction
Creators: name: Sharma, Rajat
name: Schwandt, Tobias
name: Kunert, Christian
name: Urban, Steffen
name: Broll, Wolfgang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The reconstruction of real-world surfaces is on high demand in various applications. Most existing reconstruction approaches apply 3D scanners for creating point clouds which are generally sparse and of low density. These points clouds will be triangulated and used for visualization in combination with surface normals estimated by geometrical approaches. However, the quality of the reconstruction depends on the density of the point cloud and the estimation of the surface normals. In this paper, we present a novel deep learning architecture for point cloud upsampling that enables subsequent stable and smooth surface reconstruction. A noisy point cloud of low density with corresponding point normals is used to estimate a point cloud with higher density and appendant point normals. To this end, we propose a compound loss function that encourages the network to estimate points that lie on a surface including normals accurately predicting the orientation of the surface. Our results show the benefit of estimating normals together with point positions. The resulting point cloud is smoother, more complete, and the final surface reconstruction is much closer to ground truth.
Solar System planetary orbital motions and f(R) Theories of Gravity
Creators: name: Ruggiero, Matteo Luca
name: Iorio, Lorenzo
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we study the effects of $f(R)$ Theories of Gravity on Solar System gravitational tests. In particular, starting from an exact solution of the field equation in vacuum, in the Palatini formalism, we work out the effects that the modifications to the Newtonian potential would induce on the Keplerian orbital elements of the Solar System planets, and compare them with the latest results in planetary orbit determination from the EPM2004 ephemerides. It turns out that the longitudes of perihelia and the mean longitudes are affected by secular precessions. We obtain the resulting best estimate of the parameter $k$ which, being simply related to the scalar curvature, measures the non linearity of the gravitational theory. We use our results to constrain the cosmological constant and show how $f(R)$ functions can be constrained, in principle. What we obtain suggests that, in agreement with other recent papers, the Solar System experiments are not effective to set such constraints, if compared to the cosmologically relevant values.
description: 6 Pages, RevTeX, minor revision, new references added, to appear in JCAP
Διαταραχές του φάσματος του αυτισμού: μέθοδοι παρέμβασης στην γλώσσα και την επικοινωνία
Creators: name: Αλτινίδου, Παναγιώτα Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Διαταραχές Αυτιστικού Φάσματος (ΔΑΦ)
Γλώσσα και επικοινωνία
Παρεμβάσεις
Autism Spectrum Disorders (ASD)
Language and communication
Interventions

description: Τα τελευταία χρόνια έχουν αναπτυχθεί και εφαρμοστεί ποικίλα προγράμματα παρέμβασης τα οποία στοχεύουν στην ενίσχυση, μεταξύ άλλων, των επικοινωνιακών και γλωσσικών δεξιοτήτων των παιδιών με Διαταραχή Αυτιστικού Φάσματος (ΔΑΦ). Ένα αρκετά ευρύ φάσμα μελετών, δε, έχει επιχειρήσει να αξιολογήσει την αποτελεσματικότητα και εγκυρότητα των εν λόγω παρεμβάσεων. Στόχος της παρούσας βιβλιογραφικής ανασκόπησης είναι, αρχικά, η παρουσίαση των σημαντικότερων παρεμβάσεων που στοχεύουν στην αντιμετώπιση των γλωσσικών κι επικοινωνιακών ελλειμμάτων στο φάσμα του αυτισμού. Στα πλαίσια αυτά, τονίζεται η σημασία της πρώιμης παρέμβασης, ειδικά στην ιδιαίτερη περίπτωση του αυτισμού και επιχειρείται μία κατηγοριοποίηση των σχετικών παρεμβάσεων σε τέσσερις ευρείες κατηγορίες (συμπεριφοριστικές, αναπτυξιακές, εκπαιδευτικές παρεμβάσεις και αυξητικά - εναλλακτικά συστήματα επικοινωνίας). Επίσης, παρουσιάζονται τα διαθέσιμα εμπειρικά στοιχεία σχετικά με την αποτελεσματικότητα και την αξιοπιστία των σημαντικότερων προγραμμάτων παρέμβασης. Τα στοιχεία αυτά συζητούνται κριτικά σε σχέση με τις δυνατότητες εφαρμογής των εν λόγω παρεμβάσεων σε παιδιά με ΔΑΦ, ενώ προτείνονται κατευθύνσεις για μελλοντικές έρευνες
description: Various intervention programs have been developed and applied, recently, aiming at reinforcing the language and communication skills of children with Autistic Spectrum Disorder (ASD). Moreover, a wide range of studies attempted to evaluate the effectiveness and validity of those interventions. The aim of the present review is to present the most important interventions, that are targeting language and communication deficits in the autistic spectrum. Along this context, the importance of early intervention is highlighted and an attempt is made to organize the most important interventions in four big categories (behavioral, developmental, educational interventions and augmentative and alternative communication systems). Furthermore, available empirical data regarding the effectiveness and validity of the most prominent intervention programs are presented. Finally, the gathered data regarding the application potential of the interventions for children with ASD are critically discussed, and new directions for future research are suggested
Σχολιασμένη μετάφραση αποσπάσματος από το βιβλίο Literarische Übersetzung – Geschichte, Theorie, Kulturelle Wirkung του Jörn Albrecht. Κεφάλαιο 4.3
Creators: name: Ηλιάδης, Χρήστος Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Σχολιασμένη μετάφραση
Γερμανικά/Ελληνικά
Περί των οφελών και των μειονεκτημάτων της μετάφρασης στη γλώσσα
Annotated translation
German/Greek
Benefits and disadvantages of translation for the language

description: Σκοπός της μεταπτυχιακής εργασίας ήταν η σχολιασμένη μετάφραση ενός κειμένου από την γερμανική στην ελληνική γλώσσα. Το κείμενο που επιλέχθηκε να μεταφραστεί αποτελεί απόσπασμα από το βιβλίο του Jörn Albrecht Literarishe Übersetzung – Geschichte, Theorie, Kulturelle Wirkung. Συγκεκριμένα πρόκειται για το κεφάλαιο 4.3, το οποίο πραγματεύεται τα οφέλη και τα μειονεκτήματα της μετάφρασης στη γλώσσα. Μετά τη μετάφραση του κειμένου ακολουθεί ένα γλωσσάρι όρων καθώς και η τεκμηρίωση των όρων αυτών. Η εργασία ολοκληρώνεται με την τεκμηρίωση της ορολογικής έρευνας και τον σχολιασμό των μεταφραστικών δυσκολιών.
description: The aim of the present thesis was the annotated translation of a German text into the Greek language. The chosen text was extracted from the book Literarishe Übersetzung – Geschichte, Theorie, Kulturelle Wirkung by Jörn Albrecht, particulary chapter 4.3, in which the benefits and disadvantages of translation for the language are discussed. Following the translation of the passage, a glossary of terms and their documentation are given. The thesis is completed with the documentation of serological research and annotation of the challenges faced during the translation of the passage.
Lagrangian perturbation theory for rotating magnetic stars
Creators: name: Glampedakis, Kostas
name: Andersson, Nils
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Motivated by the possibility of radiation driven instabilities in rotating magnetic stars, we study the stability properties of general linear perturbations of a stationary and axisymmetric, infinitely conducting perfect fluid configuration threaded by a magnetic field and surrounded by vacuum. We develop a Lagrangian perturbation framework which enables us to formulate a strict stability criterion based on the notion of a canonical energy (a functional of the fluid displacement $ξ$ and its first time derivative). For any given choice of $\{ξ,\partial_t ξ\} $, the sign of the canonical energy determines whether the configuration is stable or not at the linear level. Our analysis provides the first complete description of the stability problem for a magnetic star, allowing for both rotation and the presence of a magnetic field in the exterior vacuum region. A key feature of the Lagrangian formulation is the existence of so-called `trivial' fluid displacements, which do not represent true physical perturbations. In order for the stability criterion to make rigorous sense one has to isolate these trivials and consider only the physical `canonical' displacements. We discuss this problem and formulate a condition which must be satisfied by all canonical displacements. Having obtained a well-defined stability criterion we provide examples which indicate that the magnetic field has a stabilising effect on radiation driven instabilities.
description: 16 pages, accepted for publication in MNRAS
Coarse graining of biochemical systems described by discrete stochastic dynamics
Creators: name: Seiferth, David
name: Sollich, Peter
name: Klumpp, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Many biological systems can be described by finite Markov models. A general method for simplifying master equations is presented that is based on merging adjacent states. The approach preserves the steady-state probability distribution and all steady-state fluxes except the one between the merged states. Different levels of coarse graining of the underlying microscopic dynamics can be obtained by iteration, with the result being independent of the order in which states are merged. A criterion for the optimal level of coarse graining or resolution of the process is proposed via a tradeoff between the simplicity of the coarse-grained model and the information loss relative to the original model. As a case study, the method is applied to the cycle kinetics of the molecular motor kinesin.
E-RIHS PP D.9.4 INNOVATION AGENDA
Creators: name: Sotiropoulou, Sophia
name: Anglos, Demetrios
name: Castillejo, Martha
name: Corns, Antony
name: Gibson, Adam
name: Makridaki, Maria
name: Ropret, Polonca
name: Teehan, Mary
name: Vopalensky, Michael
Publisher: name: Zenodo
Year: 2020
Subjects: Excellence
SRIA
KPIs
Co-creation
Open Science
Interoperability
Heritage Science

description: Innovation constitutes the goal and at the same time the medium for achieving all E-RIHS strategic objectives and therefore the Innovation Agenda addresses all research actions and services, training and communication as well as collaborations with other RIs and Industry (in the broad sense), in the Heritage domain. The ‘Innovation Agenda’ represents the main action plan that reflects the priorities set in key areas and provides those mechanisms and structures necessary to enable innovation in any specific identified direction. The document reviews mechanisms, internal rules and procedures concerning the E-RIHS Innovation Strategy and discusses issues related to formulating, managing and keeping up-to-date the Innovation Agenda. A systematic approach in monitoring innovation, defining metrics and indicators (KPI’s), will provide a reliable assessment of the innovation impact to Excellence, Synergies and Co-creation, Users and public engagement and the Sustainability of E-RIHS ERIC as a leader in the global HS landscape.
 This document is Deliverable 9.4, elaborated in the context of E-RIHS PP, WP-09, Task 9.2, ‘Exploitation of E-RIHS capacities: innovation, transfer of knowledge and marketing’. The analysis for this task was based on extensive qualitative and quantitative research and builds upon Deliverable 9.2 ‘Analysis of The Innovation Background’.
Documentary Materials on Mam
Creators: name: Aguilar García, Geovany
name: Aguilar Láinez, Onísimo Basbaldo
name: Carrillo Godínez, Silvia Lucrecia
name: Chilel Ramírez, Ovilia Marina
name: Maldonado Sales, Nelly Idalia Nikte
name: Martín Domingo, Rebeca
name: Mendes Sales, Jeidy Mayari
name: Sales, Henry
name: Scott, Tessa
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023

description: Audio recordings of lexical and grammatical elicitation, subtitled video recordings of narrative texts, typed field notes, PDF scans of original field notes. The collection consists of materials on multiple varieties of Mam, including Mam spoken in the following towns in Guatemala: San Juan Atitán, San Antonio Ixchiguán, San Ildefonso Ixtahuacán, San Juan Atitán, San Rafael Petzal, and San Sebastián Huehuetenango. Most of the materials focus on San Juan Atitán Mam.
A test of constancy of dark matter halo surface density and radial acceleration relation in relaxed galaxy groups
Creators: name: K, Gopika
name: Desai, Shantanu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The dark matter halo surface density, given by the product of the dark matter core radius ($r_c$) and core density ($ρ_c$) has been shown to be a constant for a wide range of isolated galaxy systems. Here, we carry out a test of this {\em ansatz} using a sample of 17 relaxed galaxy groups observed using Chandra and XMM-Newton, as an extension of our previous analysis with galaxy clusters. We find that $ρ_c \propto r_c^{-1.35^{+0.16}_{-0.17}}$, with an intrinsic scatter of about 27.3%, which is about 1.5 times larger than that seen for galaxy clusters. Our results thereby indicate that the surface density is discrepant with respect to scale invariance by about 2$σ$, and its value is about four times greater than that for galaxies. Therefore, the elevated values of the halo surface density for groups and clusters indicate that the surface density cannot be a universal constant for all dark matter dominated systems. Furthermore, we also implement a test of the radial acceleration relation for this group sample. We find that the residual scatter in the radial acceleration relation is about 0.32 dex and a factor of three larger than that obtained using galaxy clusters. The acceleration scale which we obtain is in-between that seen for galaxies and clusters.
description: 11 pages, 8 figures. Accepted in Phys. Dark universe
Measurement of the beam asymmetry in eta-photoproduction off the proton
Creators: name: al., D. Elsner et
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The beam asymmetry, $Σ$, was measured at ELSA in the reaction $\vec γp \to ηp$ using linearly polarised tagged photon beams, produced by coherent bremsstrahlung off a diamond. The crystal was oriented to provide polarised photons in the energy range $E_γ= 800$ to 1400 MeV with the maximum polarisation of $P_γ= 49$ % obtained at 1305 MeV. Both dominant decay modes of the $η$ into two photons and $3π^0$ were used to extract the beam asymmetry from the azimuthal modulation of the cross section. The measurements cover the angular range $Θ_\text{cm}\simeq 50$ -- 150 degrees. Large asymmetries up to 80 % are observed, in agreement with a previous measurement. The eta-MAID model and the Bonn--Gatchina partial wave analysis describe the measurements, but the required partial waves differ significantly.
description: 8 pages, 8 figures, submitted to EPJA
The role of massive stars in galactic chemical evolution
Creators: name: Matteucci, Francesca
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I will review the role of massive stars in galactic evolution both from the nucleosynthesis and energetics point of view. In particular, I will highlight some important observational facts explained by means of massive stars in galaxies of different morphological type: the Milky Way, ellipticals and dwarf spheroidals. I will describe first the time-delay model and its interpretation in terms of abundance ratios in galaxies, then I will discuss the importance of mass loss in massive stars to reproduce the data in the Galactic bulge and disk. I will discuss also how massive stars can be important producers of primary nitrogen if rotation in stellar models is taken into account. Concerning elliptical galaxies, I will show that to reproduce the observed [Mg/Fe] versus Mass relation in these galaxies it is necessary to assume a more important role of massive stars in more massive galaxies and that this can be achieved by means of downsizing in star formation. I will discuss how massive stars are responsible in triggering galactic winds both in ellipticals and dwarf spheroidals. These latter systems show a low overabundance of alpha-elements relative to Fe with respect to Galactic stars of the same [Fe/H]: this is interpreted as due to a slow star formation coupled with very efficient galactic winds. Finally, I will show a comparison between the predicted Type Ib/c rates in galaxies and the observed GRB rate and how we can impose constraints on the mechanism of galaxy formation by studying the GRB rate at high redshift.
description: 12 pages, 6 Figures. To appear on the Proceedings of the IAUS 250
Phenological analysis through the use of multitemporal TLS observation
Creators: name: Pascu, Ionut Silviu
name: Alexandru-Claudiu Dobre
name: Zamfira, Virgil
name: Apostol, Ecaterina
name: Leca, Stefan
name: Pitar, Diana
name: Apostol, Bogdan
name: Chivulescu, Serban
name: Ciceu, Albert
name: Duro, Juan Garcia
name: Badea, Ovidiu
Publisher: name: figshare
Year: 2021
Subjects: subject: 70504 Forestry Management and Environment
subject: FOS: Agriculture, forestry and fisheries

description: The current paper tested the hypothesis that TLS through its high accuracy, increased spatial resolution, portability, equivalenting în high temporal resolution, automated processing and unlimited revisiting capabilities of the scene once record ed, might represent the best available technology for phenological evaluation. Phenology observations represent one of the most accurate methods for evaluating the response of plant species to various climate conditions and climate changes. The main objective of this research was to identify the pattems pf early vegetation stages in the context of a reduced precipitation regime through terrestrial scanning technique. The research was carried out in a mixed forest stand ( Carpinus betulus, Acer campestre, Tilia cordata, Quercus robur) with the focus of more precisely identifying the pattem of early vegetation development. The phenological processes analysis was done at an increased spatial and temporal resolution, on specific horizontal layers by means of terrestrial laser scanning. With a daily cycle started in March, we maintained a constant scanning position as well as time of day and scanning resolution. Supervised thresholds have been set at the heights of separation between undergrowth, trunk and crown, and for each resulting layer coverage and density metrics as well as derived indices (Gap Fraction and Leaf Area Density) have been computed. For reference data, photos were interpreted as per the ICP Forests guideline. A sequential evolution was observed în all studied species. Hornbeam displayed a daily increase în LAD for all layers up until epicormic branches shadowing overtook the upper canopy visibility. Small-leaved lime showed a delay of almost 20 days in comparison to oak. Oak started with an abrupt 13% increase in foliage volume from the reference date, compared to the 3% increase în the small-leaved lime. Also, at the time of bud flushing of the small-leaved lime, the oak had already been through four similar stages (18-20-23%). Although not identica! to the historical data, analysed trends still fit the expected pattems.
Composite boson dominance in relativistic field theories
Creators: name: Caracciolo, Sergio
name: Laliena, Victor
name: Palumbo, Fabrizio
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We apply a new bosonization technique to relativistic field theories of fermions whose partition function is dominated by bosonic composites, and derive the effective action for these bosons. The derivation respects all symmetries, including gauge invariance, with the exception of Euclidean invariance which must be checked a posteriori. We use a lattice regularization which should make applications to gauge theories easier. We test the method on a fermion field theory with quartic interaction in the limit when the number of flavours N_f is large, and show that it reproduces the exact results in the bosonic sector, namely condensation of a compositeboson with the right mass which breaks the discrete chiral invariance of the model. Moreover we determine the structure function of the condensed composite, whose spatial part turns out to be identical to that of the Cooper pairs of the BCS model of superconductivity.
description: 34 pages, final version
On asymptotic constants related to products of Bernoulli numbers and factorials
Creators: name: Kellner, Bernd C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11Y60; 11B68, 11B65

description: We discuss the asymptotic expansions of certain products of Bernoulli numbers and factorials, e.g., \[ \prod_{ν=1}^n |B_{2ν}| \quad \text{and} \quad \prod_{ν=1}^n (k ν)!^{ν^r} \quad \text{as} \quad n \to \infty \] for integers $k \geq 1$ and $r \geq 0$. Our main interest is to determine exact expressions, in terms of known constants, for the asymptotic constants of these expansions and to show some relations among them.
description: 22 pages, final revised version
Statistical Approach on Differential EmissionMeasure of Coronal Holes using the CATCH Catalog
Creators: name: Heinemann, Stephan G.
name: Saqri, Jonas
name: Veronig, Astrid M.
name: Hofmeister, Stefan J.
name: Temmer, Manuela
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Coronal holes are large-scale structures in the solar atmosphere that feature a reduced temperature and density in comparison to the surrounding quiet Sun and are usually associated with open magnetic fields. We perform a differential emission measure analysis on the 707 non-polar coronal holes collected in the Collection of Analysis Tools for Coronal Holes (CATCH) catalog to derive and statistically analyze their plasma properties (i.e. temperature, electron density, and emission measure). We use intensity filtergrams of the six coronal EUV filters from the \textit{Atmospheric Imaging Assembly} onboard of the \textit{Solar Dynamics Observatory}, which cover a temperature range from $ \approx 10^{5.5}$ to $10^{7.5}$\,K. Correcting the data for stray and scattered light, we find that all coronal holes have very similar plasma properties with an average temperature of $0.94 \pm 0.18$ MK, a mean electron density of $(2.4 \pm 0.7) \times 10^{8}$\,cm$^{-3}$, and a mean emission measure of $(2.8 \pm 1.6) \times 10^{26}$\,cm$^{-5}$. The temperature distribution within the coronal hole was found to be largely uniform, whereas the electron density shows a $40\,\%$ linear decrease from the boundary towards the inside of the coronal hole. At distances greater than \SI{20}{\arcsecond} ($\approx 15$\,Mm) from the nearest coronal hole boundary, the density also becomes statistically uniform. The coronal hole temperature may show a weak solar cycle dependency, but no statistically significant correlation of plasma properties to solar cycle variations could be determined throughout the observed time period between 2010 and 2019.
description: Version is before editorial comments and typesetting. Solar Physics Version is available as open access
Propagation of non-WKB Alfven waves in a multicomponent solar wind with differential ion flow
Creators: name: Li, Bo
name: Li, Xing
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The propagation of dissipationless, hydromagnetic, non-WKB, purely toroidal Alfvén waves in a realistic background three-fluid solar wind with axial symmetry and differential proton-alpha flow is investigated. The wave equations are derived from standard multi-fluid 5-moment equations. The Alfvénic point, where the combined poloidal Alfvén Mach number $M_T=1$, is found to be a singular point for the wave equation, which is then numerically solved for three representative angular frequencies $ω=10^{-3}$, $10^{-4}$ and $10^{-5}$ rad s$^{-1}$ with a fixed wave amplitude of 10 km s$^{-1}$ imposed at the coronal base (1 $R_\odot$). Between 1 $R_\odot$ and 1 AU, the numerical solutions show substantial deviation from the WKB expectations. Even for the relatively high frequency $ω=10^{-3}$ rad s$^{-1}$, a WKB-like behavior can be seen only in regions $r\gtrsim 10$ $R_\odot$. In the low-frequency case $ω=10^{-5}$ rad s$^{-1}$, the computed profiles of wave-related parameters show a spatial dependence distinct from the WKB one, the deviation being particularly pronounced in interplanetary space. In the inner corona $r\lesssim 4$ $R_\odot$, the computed ion velocity fluctuations are considerably smaller than the WKB expectations in all cases, as is the computed wave-induced acceleration exerted on protons or alpha particles. With the chosen base wave amplitude, the wave acceleration has negligible effect on the ion force balance in the corona. Hence processes other than the non-WKB wave acceleration are needed to accelerate the ions out of the gravitational potential well of the Sun. However, at large distances beyond the Alfvénic point, the low-frequency waves can play an important role in the ion dynamics, with the net effect being to equalize the speeds of the two ion species considered.
description: 12 pages, 6 figures, ApJ in press (v661n2, June 1 2007 issue), this version differs the previous one in that now it uses the emulateapj package
The SAMI Galaxy Survey: Trends in [α/Fe] as a Function of Morphology and Environment
Creators: name: Watson, Peter J.
name: Davies, Roger L.
name: Brough, Sarah
name: Croom, Scott M.
name: D'Eugenio, Francesco
name: Glazebrook, Karl
name: Groves, Brent
name: López-Sánchez, Ángel R.
name: van de Sande, Jesse
name: Scott, Nicholas
name: Vaughan, Sam P.
name: Walcher, Jakob
name: Bland-Hawthorn, Joss
name: Bryant, Julia J.
name: Goodwin, Michael
name: Lawrence, Jon S.
name: Lorente, Nuria P. F.
name: Owers, Matt S.
name: Richards, Samuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a new set of index-based measurements of [$α$/Fe] for a sample of 2093 galaxies in the SAMI Galaxy Survey. Following earlier work, we fit a global relation between [$α$/Fe] and the galaxy velocity dispersion $σ$ for red sequence galaxies, [$α$/Fe]=(0.378$\pm$0.009)log($σ$/100)+(0.155$\pm$0.003). We observe a correlation between the residuals and the local environmental surface density, whereas no such relation exists for blue cloud galaxies. In the full sample, we find that elliptical galaxies in high-density environments are $α$-enhanced by up to 0.057$\pm$0.014 dex at velocity dispersions $σ$<100 km/s, compared with those in low-density environments. This $α$-enhancement is morphology-dependent, with the offset decreasing along the Hubble sequence towards spirals, which have an offset of 0.019$\pm$0.014 dex. At low velocity dispersion and controlling for morphology, we estimate that star formation in high-density environments is truncated $\sim1$ Gyr earlier than in low-density environments. For elliptical galaxies only, we find support for a parabolic relationship between [$α$/Fe] and $σ$, with an environmental $α$-enhancement of at least 0.03 dex. This suggests strong contributions from both environment and mass-based quenching mechanisms. However, there is no evidence for this behaviour in later morphological types.
description: 15 pages, 9 figures. Revised after comments from referee
Accelerated convergence for nonparametric regression with coarsened predictors
Creators: name: Delaigle, Aurore
name: Hall, Peter
name: Müller, Hans-Georg
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G08, 62G05 (Primary)

description: We consider nonparametric estimation of a regression function for a situation where precisely measured predictors are used to estimate the regression curve for coarsened, that is, less precise or contaminated predictors. Specifically, while one has available a sample $(W_1,Y_1),...,(W_n,Y_n)$ of independent and identically distributed data, representing observations with precisely measured predictors, where $\mathrm{E}(Y_i|W_i)=g(W_i)$, instead of the smooth regression function $g$, the target of interest is another smooth regression function $m$ that pertains to predictors $X_i$ that are noisy versions of the $W_i$. Our target is then the regression function $m(x)=E(Y|X=x)$, where $X$ is a contaminated version of $W$, that is, $X=W+δ$. It is assumed that either the density of the errors is known, or replicated data are available resembling, but not necessarily the same as, the variables $X$. In either case, and under suitable conditions, we obtain $\sqrt{n}$-rates of convergence of the proposed estimator and its derivatives, and establish a functional limit theorem. Weak convergence to a Gaussian limit process implies pointwise and uniform confidence intervals and $\sqrt{n}$-consistent estimators of extrema and zeros of $m$. It is shown that these results are preserved under more general models in which $X$ is determined by an explanatory variable. Finite sample performance is investigated in simulations and illustrated by a real data example.
description: Published in at http://dx.doi.org/10.1214/009053607000000497 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Phenological analysis through the use of multitemporal TLS observation
Creators: name: Pascu, Ionut Silviu
name: Alexandru-Claudiu Dobre
name: Zamfira, Virgil
name: Apsotol, Ecaterina
name: Leca, Stefan
name: Pitar, Diana
name: Apostol, Bogdan
name: Chivulescu, Serban
name: Ciceu, Albert
name: Duro, Juan Garcia
name: Badea, Ovidiu
Publisher: name: figshare
Year: 2021
Subjects: subject: 70504 Forestry Management and Environment
subject: FOS: Agriculture, forestry and fisheries

description: The current paper tested the hypothesis that TLS through its high accuracy, increased spatial resolution, portability, equivalenting în high temporal resolution, automated processing and unlimited revisiting capabilities of the scene once record ed, might represent the best available technology for phenological evaluation. Phenology observations represent one of the most accurate methods for evaluating the response of plant species to various climate conditions and climate changes. The main objective of this research was to identify the pattems pf early vegetation stages in the context of a reduced precipitation regime through terrestrial scanning technique. The research was carried out in a mixed forest stand ( Carpinus betulus, Acer campestre, Tilia cordata, Quercus robur) with the focus of more precisely identifying the pattem of early vegetation development. The phenological processes analysis was done at an increased spatial and temporal resolution, on specific horizontal layers by means of terrestrial laser scanning. With a daily cycle started in March, we maintained a constant scanning position as well as time of day and scanning resolution. Supervised thresholds have been set at the heights of separation between undergrowth, trunk and crown, and for each resulting layer coverage and density metrics as well as derived indices (Gap Fraction and Leaf Area Density) have been computed. For reference data, photos were interpreted as per the ICP Forests guideline. A sequential evolution was observed în all studied species. Hornbeam displayed a daily increase în LAD for all layers up until epicormic branches shadowing overtook the upper canopy visibility. Small-leaved lime showed a delay of almost 20 days in comparison to oak. Oak started with an abrupt 13% increase in foliage volume from the reference date, compared to the 3% increase în the small-leaved lime. Also, at the time of bud flushing of the small-leaved lime, the oak had already been through four similar stages (18-20-23%). Although not identica! to the historical data, analysed trends still fit the expected pattems.
Exploring the relationship between the faithfulness and entanglement of two qubits
Creators: name: Riccardi, Gabriele
name: Jones, Daniel E.
name: Yu, Xiao-Dong
name: Gühne, Otfried
name: Kirby, Brian T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A conceptually simple and experimentally prevalent class of entanglement witnesses, known as fidelity witnesses, detect entanglement via a state's fidelity with a pure reference state. While existence proofs guarantee that a suitable witness can be constructed for every entangled state, such assurances do not apply to fidelity witnesses. Recent results have found that entangled states that cannot be detected by a fidelity witness, known as unfaithful states, are exceedingly common among bipartite states. In this paper, we show that even among two-qubit states, the simplest of all entangled states, unfaithful states can be created through a suitable application of decoherence and filtering to a Bell state. We also show that the faithfulness is not monotonic to entanglement, as measured by the concurrence. Finally, we experimentally verify our predictions using polarization-entangled photons and specifically demonstrate a situation where an unfaithful state is brought to faithfulness at the expense of further reducing the entanglement of the state.
description: 9 pages, 6 figures
Energy level alignment at Alq3/La0.7Sr0.3MnO3 interface for organic spintronic devices
Creators: name: Zhan, Y. Q.
name: Bergenti, I.
name: Hueso, L.
name: Dediu, V.
name: de Jong, M. P.
name: Li, Z. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic structure of the interface between Tris (8-hydroxyquinolino)-aluminum (Alq3) and La0.7Sr0.3MnO3 manganite (LSMO) was investigated by means of photoelectron spectroscopy. As demonstrated recently this interface is characterized by efficient spin injection in organic spintronic devices. We detected a strong interface dipole of about 0.9 eV that shifts down the whole energy diagram of the Alq3 with respect to the vacuum level. This modifies the height of the barriers for the holes injection to 1.7 eV, indicating that hole injection from LSMO into Alq3 is more difficult than it was expected as the energy level matched by vacuum levels. We believe the interface dipole is due to the intrinsic dipole moment characteristic for Alq3 layer. An additional weak interaction is observed between the two materials influencing the N 1s core levels of the organic semiconductor. The presented data are of greatest importance for both qualitative and quantitative description of the organic spin valves.
description: 17 pages, 4 figures