cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spatially-resolved decoherence of donor spins in silicon strained by a metallic electrode
Creators: name: Ranjan, V.
name: Albanese, B.
name: Albertinale, E.
name: Billaud, E.
name: Flanigan, D.
name: Pla, J. J.
name: Schenkel, T.
name: Vion, D.
name: Esteve, D.
name: Flurin, E.
name: Morton, J. J. L.
name: Niquet, Y. M.
name: Bertet, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electron spins are amongst the most coherent solid-state systems known, however, to be used in devices for quantum sensing and information processing applications, they must be typically placed near interfaces. Understanding and mitigating the impacts of such interfaces on the coherence and spectral properties of electron spins is critical to realize such applications, but is also challenging: inferring such data from single-spin studies requires many measurements to obtain meaningful results, while ensemble measurements typically give averaged results that hide critical information. Here, we report a comprehensive study of the coherence of near-surface bismuth donor spins in 28-silicon at millikelvin temperatures. In particular, we use strain-induced frequency shifts caused by a metallic electrode to make spatial maps of spin coherence as a function of depth and position relative to the electrode. By measuring magnetic-field-insensitive clock transitions we separate magnetic noise caused by surface spins from charge noise. Our results include quantitative models of the strain-split spin resonance spectra and extraction of paramagnetic impurity concentrations at the silicon surface. The interplay of these decoherence mechanisms for such near-surface electron spins is critical for their application in quantum technologies, while the combination of the strain splitting and clock transition extends the coherence lifetimes by up to two orders of magnitude, reaching up to 300 ms at a mean depth of only 100nm. The technique we introduce here to spatially map coherence in near-surface ensembles is directly applicable to other spin systems of active interest, such as defects in diamond, silicon carbide, and rare earth ions in optical crystals.
description: 16 pages, 11 figures
Model Fusion to Enhance the Clinical Acceptability of Long-Term Glucose Predictions
Creators: name: De Bois, Maxime
name: Yacoubi, Mounîm A. El
name: Ammi, Mehdi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Signal Processing (eess.SP)
subject: FOS: Biological sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents the Derivatives Combination Predictor (DCP), a novel model fusion algorithm for making long-term glucose predictions for diabetic people. First, using the history of glucose predictions made by several models, the future glucose variation at a given horizon is predicted. Then, by accumulating the past predicted variations starting from a known glucose value, the fused glucose prediction is computed. A new loss function is introduced to make the DCP model learn to react faster to changes in glucose variations. The algorithm has been tested on 10 \textit{in-silico} type-1 diabetic children from the T1DMS software. Three initial predictors have been used: a Gaussian process regressor, a feed-forward neural network and an extreme learning machine model. The DCP and two other fusion algorithms have been evaluated at a prediction horizon of 120 minutes with the root-mean-squared error of the prediction, the root-mean-squared error of the predicted variation, and the continuous glucose-error grid analysis. By making a successful trade-off between prediction accuracy and predicted-variation accuracy, the DCP, alongside with its specifically designed loss function, improves the clinical acceptability of the predictions, and therefore the safety of the model for diabetic people.
El laurel de Apolo
Creators: name: Merlino, Elena
name: Antonucci, Fausta
name: ANTONUCCI, Fausta
Publisher: name: Zenodo
Year: 2024
Subjects: Calderón
Métrica dramática
Segmentación dramática
Bibliografía
El laurel de Apolo

description: Calderón Digital: base de datos, argumentos y motivos del teatro de Calderón (dir. Fausta Antonucci). Ficha dedicada a El laurel de Apolo, con datos bibliográficos primarios y secundarios, fecha probable de composición, cómputo de las formas métricas, análisis de las coordenadas espacio-temporales, adscripción genérica y sinopsis argumental detallada, con indicación de los principales motivos (diegéticos y simbólicos) y propuesta de segmentación articulada según los cambios de forma métrica, de espacio y tiempo dramáticos.
A Wavelength-Insensitive, Multispecies Entangling Gate for Group-2 Atomic Ions
Creators: name: Sawyer, Brian C.
name: Brown, Kenton R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We propose an optical scheme for generating entanglement between co-trapped identical or dissimilar alkaline earth atomic ions ($^{40}\text{Ca}^+$, $^{88}\text{Sr}^+$, $^{138}\text{Ba}^+$, $^{226}\text{Ra}^+$) which exhibits fundamental error rates below $10^{-4}$ and can be implemented with a broad range of laser wavelengths spanning from ultraviolet to infrared. We also discuss straightforward extensions of this technique to include the two lightest Group-2 ions ($\text{Be}^+$, $\text{Mg}^+$) for multispecies entanglement. The key elements of this wavelength-insensitive geometric phase gate are the use of a ground ($S_{1/2}$) and a metastable ($D_{5/2}$) electronic state as the qubit levels within a $σ^z σ^z$ light-shift entangling gate. We present a detailed analysis of the principles and fundamental error sources for this gate scheme which includes photon scattering and spontaneous emission decoherence, calculating two-qubit-gate error rates and durations at fixed laser beam intensity over a large portion of the optical spectrum (300 nm to 2 $μ\text{m}$) for an assortment of ion pairs. We contrast the advantages and disadvantages of this technique against previous trapped-ion entangling gates and discuss its applications to quantum information processing and simulation with like and multispecies ion crystals.
description: 16 pages, 5 figures
Dissipation-induced antiferromagnetic-like frustration in coupled photonic resonators
Creators: name: Li, Zejian
name: Soret, Ariane
name: Ciuti, Cristiano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose a photonic quantum simulator for anti-ferromagnetic spin systems based on reservoir engineering. We consider a scheme where quadratically driven dissipative Kerr cavities are indirectly coupled via lossy ancillary cavities. We show that the ancillary cavities can produce an effective dissipative and Hamiltonian anti-ferromagnetic-like coupling between the cavities. By solving the master equation for a triangular cavity configuration, we demonstrate that the non-equilibrium steady state of the system bears full analogy with the ground state of an antiferromagnetic Ising model, exhibiting key signatures of frustration. We show that when the effective photon hopping amplitude is zero, the engineered non-local dissipation alone is capable of inducing antiferromagnetic interaction and frustration. This simple scheme can be generalised to arbitrary lattice geometries, providing a fully controllable recipe for simulating antiferromagnetism and frustration on a controlled quantum optical platform.
description: 8 pages, 6 figures
Detecting and quantifying palaeoseasonality in stalagmites using geochemical and modelling approaches
Creators: name: Baldini, James U. L.
name: Lechleitner, Franziska A.
name: Breitenbach, Sebastian F. M.
name: van Hunen, Jeroen
name: Baldini, Lisa M.
name: Wynn, Peter M.
name: Jamieson, Robert A.
name: Ridley, Harriet E.
name: Baker, Alex J.
name: Walczak, Izabela W.
name: Fohlmeister, Jens
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Stalagmites are an extraordinarily powerful resource for the reconstruction of climatological palaeoseasonality. Here, we provide a comprehensive review of different types of seasonality preserved by stalagmites and methods for extracting this information. A new drip classification scheme is introduced, which facilitates the identification of stalagmites fed by seasonally responsive drips and which highlights the wide variability in drip types feeding stalagmites. This hydrological variability, combined with seasonality in Earth atmospheric processes, meteoric precipitation, biological processes within the soil, and cave atmosphere composition means that every stalagmite retains a different and distinct (but correct) record of environmental conditions. Replication of a record is extremely useful but should not be expected unless comparing stalagmites affected by the same processes in the same proportion. A short overview of common microanalytical techniques is presented, and suggested best practice discussed. In addition to geochemical methods, a new modelling technique for extracting meteoric precipitation and temperature palaeoseasonality from stalagmite d18O data is discussed and tested with both synthetic and real-world datasets. Finally, world maps of temperature, meteoric precipitation amount, and meteoric precipitation oxygen isotope ratio seasonality are presented and discussed, with an aim of helping to identify regions most sensitive to shifts in seasonality.
Separability in Cohomogeneity-2 Kerr-NUT-AdS Metrics
Creators: name: Chen, W.
name: Lu, H.
name: Pope, C. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The remarkable and unexpected separability of the Hamilton-Jacobi and Klein-Gordon equations in the background of a rotating four-dimensional black hole played an important role in the construction of generalisations of the Kerr metric, and in the uncovering of hidden symmetries associated with the existence of Killing tensors. In this paper, we show that the Hamilton-Jacobi and Klein-Gordon equations are separable in Kerr-AdS backgrounds in all dimensions, if one specialises the rotation parameters so that the metrics have cohomogeneity 2. Furthermore, we show that this property of separability extends to the NUT generalisations of these cohomogeneity-2 black holes that we obtained in a recent paper. In all these cases, we also construct the associated irreducible rank-2 Killing tensor whose existence reflects the hidden symmetry that leads to the separability. We also consider some cohomogeneity-1 specialisations of the new Kerr-NUT-AdS metrics, showing how they relate to previous results in the literature.
description: Latex, 15 pages, minor typos corrected
Αφαίρεση βιομηχανικών χρωμάτων από ξύλινα υποστρώματα με την χρήση laser
Creators: name: Πιτέλη, Βάγια Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: λέιζερ
ξύλο
αλκυδικό χρώμα
laser cleaning
wood
alkyd paint

description: Στην παρούσα εργασία διερευνήθηκε η δυνατότητα αφαίρεσης με ακτινοβολία laser βιομηχανικών χρωμάτων από ξύλινα υποστρώματα. Η προσέγγιση αφορά σε αντικείμενα πολιτιστικής κληρονομιάς. Στόχος της πειραματικής διαδικασίας ήταν να βρεθούν κατάλληλες παράμετροι ακτινοβόλησης για αποτελεσματική αφαίρεση του χρώματος με ταυτόχρονη διατήρηση της ακεραιότητας της ξύλινης επιφάνειας. Πειράματα ακτινοβολήσεων με laser έγιναν σε δύο είδη ξύλου, πεύκο και δρυ, τα οποία έφεραν επίστρωση αλκυδικού χρώματος. Έγιναν δοκιμές με ακτινοβόληση στα 1064 nm και στα 355 nm σημειακά και με σάρωση μεγαλύτερων επιφανειών. Οι αναλυτικές τεχνικές που χρησιμοποιήθηκαν για την μελέτη των υλικών ήταν η φασματοσκοπία UV/Vis/NIR, η φασματοσκοπία πλάσματος επαγόμενη από laser (Laser induced breakdown spectroscopy - LIBS) και η φασματοσκοπία Raman. Τα αποτελέσματα των ακτινοβολήσεων αξιολογήθηκαν με οπτική μικροσκοπία, φασματική απεικόνιση και ολογραφική συμβολομετρία. Η αξιολόγηση των αποτελεσμάτων έδειξε ότι υπάρχει παράθυρο παραμέτρων, τέτοιο ώστε η αφαίρεση αλκυδικού χρώματος από επιφάνειες πεύκου και δρυός να είναι αποτελεσματική, χωρίς να προκαλούνται φθορές στο ξύλινο υπόστρωμα.
description: In the present thesis, laser assisted removal of alkyd paints from wooden substrates was investigated. The focus was on wooden artifacts. The aim of the experimental process was to determine the optimal laser parameters for the efficient removal of paint while preserving the integrity of the wooden surface. Two kinds of wooden substrates, pine and oak, coated with alkyd paint were irradiated at 1064 nm and 355 nm. The analytical methods used for the characterization of the materials were UV/Vis/NIR spectroscopy, Laser induced breakdown spectroscopy (LIBS) and Raman spectroscopy. The results of laser irradiation were evaluated by optical microscopy, spectral imaging, and holographic interferometry. The results provided strong evidence for the existence of optimal laser parameters for the safe and efficient removal of paint from wood.
3D simulations of vertical displacement events in tokamaks: A benchmark of M3D-C$^1$, NIMROD and JOREK
Creators: name: Artola, F. J.
name: Sovinec, C. R.
name: Jardin, S. C.
name: Hoelzl, M.
name: Krebs, I.
name: Clauser, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In recent years, the nonlinear 3D magnetohydrodynamic codes JOREK, M3D-C$^1$ and NIMROD developed the capability of modelling realistic 3D vertical displacement events (VDEs) including resistive walls. In this paper, a comprehensive 3D VDE benchmark is presented between these state of the art codes. The simulated case is based on an experimental NSTX plasma but with a simplified rectangular wall. In spite of pronounced differences between physics models and numerical methods, the comparison shows very good agreement in the relevant quantities used to characterize disruptions such as the 3D wall forces and energy decay. This benchmark does not only bring confidence regarding the use of the mentioned codes for disruption studies, but also shows differences with respect to the used models (e.g. reduced versus full MHD models). The simulations show important 3D features for a NSTX plasma such as the self-consistent evolution of the halo current and the origin of the wall forces. In contrast to other reduced MHD models based on an ordering in the aspect ratio, the ansatz based JOREK reduced MHD model allows capturing the 3D dynamics even in the spherical tokamak limit considered here.
Deformations of coalgebra morphisms
Creators: name: Yau, Donald
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16W30

description: An algebraic deformation theory of coalgebra morphisms is constructed.
description: 10 pages. To appear in Journal of Algebra
Multivariable Christoffel-Darboux Kernels and Characteristic Polynomials of Random Hermitian Matrices
Creators: name: Rosengren, Hjalmar
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 15A15, 15A52, 42C05

description: We study multivariable Christoffel-Darboux kernels, which may be viewed as reproducing kernels for antisymmetric orthogonal polynomials, and also as correlation functions for products of characteristic polynomials of random Hermitian matrices. Using their interpretation as reproducing kernels, we obtain simple proofs of Pfaffian and determinant formulas, as well as Schur polynomial expansions, for such kernels. In subsequent work, these results are applied in combinatorics (enumeration of marked shifted tableaux) and number theory (representation of integers as sums of squares).
description: This is a contribution to the Vadim Kuznetsov Memorial Issue on Integrable Systems and Related Topics, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
An inhomogeneous model for the Galactic halo: a possible explanation for the spread observed in s- and r-process elements
Creators: name: Cescutti, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose an explanation for the considerable scatter of the abundances of neutron capture elements observed in low-metallicity stars in the solar vicinity, compared to the small star-to-star scatter observed for the alpha-elements. We have developed a stochastic chemical evolution model in which the main assumption is a random formation of new stars subject to the condition that the cumulative mass distribution follows a given initial mass function. With our model, we are able to reproduce the different spreads of neutron capture elements and alpha-elements in low-metallicity stars. The reason for different observed spread in neutron capture elements and alpha-elements resides in the random birth of stars, coupled with different stellar mass ranges, from which alpha-elements and neutron capture elements originate. In particular, the site of production of alpha-elements is the whole range of massive stars, from 10 to 80 Msun whereas the mass range of production for neutron capture elements lies between 12 and 30 Msun.
description: 10 pages, 14 figures, accepted for publication in A&A
Report on academic integrity awareness and Open Science recognition levels in Ukraine (2021-2023)
Creators: name: Kormann, Eva
name: Klebel, Thomas
name: Zhezhnych, Pavlo
name: Berezko, Oleksandr
name: Ross-Hellauer, Tony
Publisher: name: Zenodo
Year: 2024
Subjects: open science
academic integrity
research integrity
Ukraine
survey
academia
academic community
students

description: This report presents the results from three consecutive surveys on Open Science (OS) and academic integrity attitudes and behaviors spanning the years 2021 to 2023. The survey data includes a total of 24,705 total responses from members of the student body and academic community of Ukrainian higher education institutions. OS describes a movement aiming to make science more open, transparent, accessible, and collaborative. Academic integrity refers to principles of responsible behaviors in relation to all academic practice, including the conduct of research, as well as student behavior in the context of education. In Ukraine, great efforts have been made to promote both OS and academic integrity. This survey was conducted in the course of the OPTIMA project (Erasmus+, 618940-EPP-1-2020-1-UA-EPPKA2-CBHE-JP), which specifically aims to improve higher education and academic integrity, e.g., by raising OS awareness and establishing more OS practices. Despite difficult circumstances caused by the pandemic and war, encouraging progress has been made in Ukraine, such as approving the National Open Science Plan in 2022. Still, there have so far been no large-scale systematic investigations of awareness, attitudes, and behaviors until this study. This survey aims to fill this gap and provide benchmarks for future monitoring.

Original data and materials are available from Berezko et al. (2021; 2022, 2023). Translated data and analysis code are available from Kormann et al. (2024).

The OPTIMA consortium considers this report a preprint of the upcoming publication of this material in a peer reviewed Open Access publishing venue. This will be done after collecting feedback from stakeholders.

The European Commission's support for the production of this publication does not constitute an endorsement of the contents, which reflect the views only of the authors, and the Commission cannot be held responsible for any use which may be made of the information contained therein.
Exact spectrum of scalar field perturbations in a radiation deformed closed de Sitter universe
Creators: name: Sarangi, Sash
name: Schalm, Koenraad
name: Shiu, Gary
name: van der Schaar, Jan Pieter
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We observe that the equation of motion for a free scalar field in a closed universe with radiation and a positive cosmological constant is given by Lamé's equation. Computing the exact power spectrum of scalar field perturbations, the presence of both curvature and radiation produces a red tilt weakly dependent on the amount of radiation.
description: 16 pages, 2 figures
Cationic carbonyl derivatives of electron-rich metals-syntheses, structures, and spectroscopic properties
Creators: name: Wang, Changqing
Publisher: name: University of British Columbia
Year: 2009

description: The range of thermally stable, predominantly a-bonded metal carbonyl derivatives has been expanded to include Pd(I), Pd(II), Ir(III), Os(II), and Ru(II). The new compounds, [Pd(CO)₄][Sb₂F₁₁]₂, cis-Pd(CO)₂(SO₃F)₂, [Pd₂(µ-CO)₂](SO₃F)₂, [Pd₂(µ -CO) ₂][Sb₂₁₁]₂, mer- Ir(CO)₃(SO₃F)₃, [Ir(CO)₅Cl][Sb₂ F₁₁]₂, [Ru(CO)₆][Sb₂F₁₁]₂, [Os(CO)₆][Sb₂F₁₁]₂, and cis- Pt(CO)₂(Sb₂Fn)₂ have been synthesized. The compounds have been characterized using a variety of physico-chemical techniques: elemental analysis, FT-IR and Raman spectroscopy, and ¹³C NMR spectroscopy. For cis-Pd(CO)₂(SO₃F)₂, [Pd₂(µ-CO)₂](SO₃F)₂, mer- Ir(CO)₃(SO₃F)₃, and [Ir(CO)₅Cl][Sb₂F₁₁]₂, the molecular structures have been determined by single crystal X-ray diffraction. [More abstract follows; please see pp.3+ of the accompanying pdf file]
Combining magneto-hydrostatic constraints with Stokes profile inversions. II. Application to Hinode/SP observations
Creators: name: Borrero, J. M.
name: Yabar, A. Pastor
name: Cobo, B. Ruiz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Inversion techniques applied to the radiative transfer equation for polarized light are capable of inferring the physical parameters in the solar atmosphere (temperature $T$, magnetic field ${\bf B}$, and line-of-sight velocity $v_{\rm los}$) from observations of the Stokes vector (i.e., spectropolarimetric observations) in spectral lines. Inferences are usually performed in the $(x,y,τ_c)$ domain, where $τ_c$ refers to the optical-depth scale. Generally, their determination in the $(x,y,z)$ volume is not possible due to the lack of a reliable estimation of the gas pressure, particularly in regions of the solar surface harboring strong magnetic fields. We aim to develop a new inversion code capable of reliably inferring the physical parameters in the $(x,y,z)$ domain. We combine, in a self-consistent way, an inverse solver for the radiative transfer equation (Firtez-DZ) with a solver for the magneto-hydrostatic (MHS) equilibrium, which derives realistic values of the gas pressure by taking the magnetic pressure and tension into account. We test the correct behavior of the newly developed code with spectropolarimetric observations of two sunspots recorded with the spectropolarimeter (SP) instrument on board the Hinode spacecraft, and we show how the physical parameters are inferred in the $(x,y,z)$ domain, with the Wilson depression of the sunspots arising as a natural consequence of the force balance. In particular, our approach significantly improves upon previous determinations that were based on semiempirical models. Our results open the door for the possibility of calculating reliable electric currents in three dimensions, ${\bf j}(x,y,z)$, in the solar photosphere. Further consistency checks would include a comparison with other methods that have recently been proposed and which achieve similar goals.
description: 15 pages; 10 figures; accepted for publication in Astronomy and Astrophysics
POVOS E COMUNIDADES TRADICIONAIS E O MANEJO DA BIODIVERSIDADE  BRASILEIRA: Um vínculo de coexistência com a terra
Creators: name: CARVALHO, LUIS
name: CARVALHO, LUIS
Publisher: name: Zenodo
Year: 2023

description: Brazil, a country of continental dimensions that holds one of the highest rates of biological diversity on the planet, much coveted by development projects. It is characterized by a population with remarkable cultural diversity, shaped by a historical context of colonization that drove several communities with distinct cultural characteristics to resist and adapt to different ecosystems. In this sense, the present study analyzes the relationships between traditional communities and the maintenance of the elements of nature present in the territories they occupy. Through a bibliographical survey and a thorough analysis of the academic literature from the perspective of historical-dialectical materialism as a concrete way of understanding social dynamics. It is verified the deep respect for the diverse that traditional communities demonstrate, with local practices responsible for generating, caring for and maintaining biological diversity, making it fundamental to insert effective public policies of valorization and protection that recognize the value and importance of this knowledge for the continuation of life.
Dynamical diffeomorphisms
Creators: name: Ferrero, Renata
name: Percacci, Roberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct a general effective dynamics for diffeomorphisms of spacetime, in a fixed external metric. Though related to familiar models of scalar fields as coordinates, our models have subtly different properties, both at kinematical and dynamical level. The energy-momentum tensor consists of two independently conserved parts. The background solution is the identity diffeomorphism and the energy-momentum tensor of this solution gives rise to an effective cosmological constant.
Quarkonium Production in PHENIX
Creators: name: Bickley, Abigail
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Quarkonia provide a sensitive probe of the properties of the hot dense medium created in high energy heavy ion collisions. Hard scattering processes result in the production of heavy quark pairs that interact with the collision medium during hadronization. These in medium interactions convey information about the fundamental properties of the medium itself and can be used to examine the modification of the QCD confining potential in the collision environment. Baseline measurements from the d+Au and p+p collision systems can be used to distinguish cold nuclear matter effects while measurements from heavy ion collision systems, Au+Au and Cu+Cu, can be used to quantify in-medium effects. PHENIX results for the production of the $J/ψ$ for a diverse set of collision systems and energies and for the $Υ$ in p+p collisions are presented.
description: 9 pages, 7 figures, Proceedings for Hard Probes 2006
A 3D dynamical biomechanical tongue model to study speech motor control
Creators: name: Gerard, Jean-Michel
name: Wilhelms-Tricarico, Reiner
name: Perrier, Pascal
name: Payan, Yohan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: A 3D biomechanical dynamical model of human tongue is presented, that is elaborated in the aim to test hypotheses about speech motor control. Tissue elastic properties are accounted for in Finite Element Modeling (FEM). The FEM mesh was designed in order to facilitate the implementation of muscle arrangement within the tongue. Therefore, its structure was determined on the basis of accurate anatomical data about the tongue. Mechanically, the hypothesis of hyperelasticity was adopted with the Mooney-Rivlin formulation of the strain energy function. Muscles are modeled as general force generators that act on anatomically specified sets of nodes of the FEM structure. The 8 muscles that are known to be largely involved in the production of basic speech movements are modeled. The model and the solving of the Lagrangian equations of movement are implemented using the ANSYSTM software. Simulations of the influence of muscle activations onto the tongue shape are presented and analyzed.
Η εορτή της Υπαπαντής: ιστορία-γραμματεία-θεολογία
Creators: name: Χαμαλάκη, Φωτεινή Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Υπαπαντή
Εορτή
Συμεών Θεοδόχος
Hypapante
Feast
Simeon Theodochos

description: Σκοπός αυτής της Διπλωματικής εργασίας είναι να καταστεί γνωστή στο ευρύτερο κοινό αυτή η τόσο σημαντική εορτή της Χριστιανοσύνης , που είναι η εορτή της Υπαπαντής. Μιας και οι περισσότεροι γνωρίζουν μόνο την εορτή των Χριστουγέννων και τον εορτασμό του Πάσχα. Η συγκεκριμένη εργασία αποτελείται από τρία κεφάλαια: α) το ιστορικό μέρος, β) το πατρολογικό μέρος και γ) το θεολογικά συμπεράσματα τα οποία προκύπτουν από την παραπάνω έρευνα. Όταν λέμε Υπαπαντή εννοούμε την αφιέρωση του σαρανταήμερου θείου βρέφους Ιησού στο ναό του Σολομώντος στην Ιερουσαλήμ και την προυπάντηση του από το γέροντα Συμεών και την προφήτιδα Άννα. Κεντρικά πρόσωπα της συγκεκριμένης εορτής είναι ο Χριστός, η Παρθένος Μαρία και ο γερόντας Συμεών. Δευτερεύοντα πρόσωπα είναι η προφήτιδα Άννα και ο Ιωσήφ, ο μνηστήρας της Μαρίας. Η εορτή έχει τις εξής ονομασίες: « Υπαντή- Υπάντησις και Υπαπάντησις». Τιμάται στις 2 Φεβρουαρίου, ύστερα από το αυτοκρατορικό διάταγμα του Ιουστινιανού το 541 ή το 541 μ. Χ. στην Κωνσταντινούπολη, την πρωτεύουσα του Βυζαντίου. Η εορτή εισήχθη και στη Δύση από την Ανατολή. Στο δεύτερο κεφάλαιο αναπτύσσονται τα αγιολογικά κείμενα των Εκκλησιαστικών Πατέρων και των συγγραφέων, που έχουν γραφεί επάνω στην εορτή της Υπαπαντής. Χρονικά εξετάζονται οι λόγοι και οι ομιλίες από τον 4ο αιώνα έως και τον 14ο. Επίσης γίνεται μία αναφορά στην Υμνολογία της εορτής. Τελειώνοντας, στο τρίτο μέρος αναφέρονται τα θεολογικά συμπεράσματα , τα οποία προέκυψαν από την παραπάνω μελέτη.
description: The purpose of this thesis is to widely publicize this very important feast of Christianity which is the feast of Hypapante. Since most know only the celebration of Christmas and the celebration of Easter. This work consists of three sections: a) the historical part, b) the literature about the feast and c) the theological conclusions in the above research. Hypapante means the dedication of the forty–divine infant Jesus in the Temple of Solomon in Jerusalem and his presentation to the old man Symeon and the prophetess Anna. Main characters of this feast are Christ, the Virgin Mary and the old man Symeon. Secondary characters are prophetess Anna and Joseph, Mary’s suitor. The feast has the following names: «Ypanti-Ypantisis and Ypapantisis.» Is celebrated on February 2, after the imperial decree of Justinian in 541 or 542 AD in Constantinople, the capital of the Byzantium. The feast was introduced to the West from the East. The second chapter elaborates on the hagiographical texts of the Church Fathers and ecclesiastical writers who have written on the feast of the Presentation. There are also examine the encomia and the speeches dating by the 4th till the 14th century. There is also a reference to the hymnography of the feast. Finally, the third party is referred to the theological conclusions which emerged from the above study.
Influence of Point-like Disorder on the Guiding of Vortices and the Hall Effect in a Washboard Planar Pinning Potential
Creators: name: Shklovskij, Valerij A.
name: Dobrovolskiy, Oleksandr V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Explicit current-dependent expressions for anisotropic longitudinal and transverse nonlinear magnetoresistivities are represented and analyzed on the basis of a Fokker-Planck approach for two-dimensional single-vortex dynamics in a washboard pinning potential in the presence of point-like disorder. Graphical analysis of the resistive responses is presented both in the current-angle coordinates and in the rotating current scheme. The model describes nonlinear anisotropy effects caused by the competition of point-like (isotropic) and anisotropic pinning. Nonlinear guiding effects are discussed and the critical current anisotropy is analyzed. Gradually increasing the magnitude of isotropic pinning force this theory predicts a gradual decrease of the anisotropy of the magnetoresistivities. The physics of transition from the new scaling relations for anisotropic Hall resistance in the absence of point-like pins to the well-known scaling relations for the point-like disorder is elucidated. This is discussed in terms of a gradual isotropizaton of the guided vortex motion, which is responsible for the existence in a washboard pinning potential of new (with respect to magnetic field reversal) Hall voltages. It is shown that whereas the Hall conductivity is not changed by pinning, the Hall resistivity can change its sign in some current-angle range due to presence of the competition between i- and a-pins.
ROLE OF HEPATIC CHOLESTEROL ESTER HYDROLASE (CEH) IN HYDROLYZING CHOLESTEROL ESTERS (CE) DELIVERED VIA SR-BI (SCAVENGER RECEPTOR CLASS B TYPE I) AND SR-BII
Creators: name: Bajpai, Saurabh
Publisher: name: VCU Libraries
Year: 2009

description: VCU Theses and Dissertations
Generating functional analysis of batch minority games with arbitrary strategy numbers
Creators: name: Shayeghi, N.
name: Coolen, A. C. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Both the phenomenology and the theory of minority games (MG) with more than two strategies per agent are different from those of the conventional and extensively studied case S=2. MGs with $S>2$ exhibit nontrivial statistics of the frequencies with which the agents select from their available decision making strategies, with far-reaching implications. In the few theoretical MG studies with $S>2$ published so far, these statistics could not be calculated analytically. This prevented solution even in ergodic stationary states; equations for order parameters could only be closed approximately, using simulation data. Here we carry out a generating functional analysis of fake history batch MGs with arbitary values of $S$, and give an analytical solution of the strategy frequency problem. This leads to closed equations for order parameters in the ergodic regime, exact expressions for strategy selection statistics, and phase diagrams. Our results find perfect confirmation in numerical simulations.
description: 16 pages LaTex, 17 eps figures (reduced in size; for high resolution versions please see http://www.mth.kcl.ac.uk/~nima/MG_MixS)
Προσηλυτισμός και ελευθερία διάδοσης θρησκείας με αφορμή τις υποθέσεις Κοκκινάκης κατά Ελλάδος και Λαρίσσης και λοιποί κατά Ελλάδος
Creators: name: Φουντουκοπούλου, Γεωργία Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Προσηλυτισμός
Διάδοση
Koκκινάκης
Proselytism
Spread
Kokkinakis

description: Η παρούσα εργασία πραγματεύεται τον προσηλυτισμό και την ελευθερία διάδοσης της θρησκείας με αφορμή τις υποθέσεις Κοκκινάκης κατά Ελλάδος και Λαρίσσης και λοιποί κατά Ελλάδος και δομείται σε πέντε κεφάλαια. Το πρώτο κεφάλαιο πραγματεύεται την ελευθερία αλλαγής, εκδήλωσης, διάδοσης και διδασκαλίας της θρησκείας ή των πεποιθήσεων από συνταγματική σκοπιά και με αναφορά στις υποθέσεις Κοκκινάκης και Λαρίσσης κατά Ελλάδος. Η οριοθέτηση του προσηλυτισμού και η διάκριση θεμιτού και καταχρηστικού προσηλυτισμού αποτελεί τη θεματική του δεύτερου κεφαλαίου της εργασίας. Στο τρίτο κεφάλαιο επιχειρείται η δογματική ανάλυση του άρθρου 4 α.ν. 1363/1938, όπως αυτός τροποποιήθηκε με το άρθρο 2 α.ν. 1672/1939, ήτοι του εγκλήματος του προσηλυτισμού. Πρόκειται για έγκλημα το οποίο παρουσιάζει πολυάριθμα και δυσχερή δογματικά ζητήματα, τα οποία δεν ήταν δυνατόν να εξεταστούν άπαντα και σε πλήρη έκταση στα πλαίσια της παρούσας εργασίας. Γι’ αυτόν τον λόγο έγινε προσπάθεια να αναλυθούν τα βασικότερα ζητήματα, τα οποία εμφανίζουν και θεωρητική πρόκληση και πρακτικό αντίκρισμα. Στα τελευταία δύο κεφάλαια αναλύονται οι αποφάσεις Κοκκινάκης κατά Ελλάδος και Λαρίσσης και λοιποί κατά Ελλάδος με παράθεση και των αποκλινουσών γνωμών.
description: This work deals with proselytism and freedom of religion spread in the wake of Kokkinakis v. Greece and Larissis and Others v. Greece and is structured in five chapters. The first chapter deals with the freedom to change, indicate, spread and teach religion or belief from a constitutional standpoint and with reference to cases Kokkinakis and Larissis vs Greece. The conceptual definition of proselytism and the discrimination between proselytism and abusive proselytism is the theme of the second chapter of the work. In the third chapter, the theme is the doctrinal analysis of Article 4 emergency law 1363/1938, as amended by Article 2 emergency law 1672/1939, namely the crime of proselytism. It is a crime that has numerous and difficult doctrinal issues that could not be answered and dealt with to the full extent in the present work. For this reason we tried to analyze the key issues that have both a theoretical challenge and practical relevance. In the last two chapters are analysed the decisions Kokkinakis v. Greece and Larissis and Others v. Greece in apposition of the divergent opinions.
The Entropy of Lagrange-Finsler Spaces and Ricci Flows
Creators: name: Vacaru, Sergiu I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C44, 53C21, 53C25, 83C15, 83C99, 83E99

description: We formulate a statistical analogy of regular Lagrange mechanics and Finsler geometry derived from Grisha Perelman's functionals generalized for nonholonomic Ricci flows. There are elaborated explicit constructions when nonholonomically constrained flows of Riemann metrics result in Finsler like configurations, and inversely, and geometric mechanics is modelled on Riemann spaces with preferred nonholonomic frame structure.
description: latex2e, 20 pages, v3, the variant accepted to Rep. Math. Phys
Solution H₂S Chemistry of Pd-bis(Diphenylphosphino)methane (DPM) complexes; catalytic conversion of H₂S to H₂
Creators: name: Wong, Terrance Yu Hung
Publisher: name: University of British Columbia
Year: 2009

description: This thesis describes studies on the interaction of H₂S with mono- and dinuclear Pd - dpm (bis(diphenylphosphino)methane) complexes with the ultimate goal being to catalyze the conversion of H₂S to H₂ and elemental sulfur (S₈). Solution kinetic and mechanistic studies were performed on the abstraction of sulfur from Pd₂X₂(µ-S)(µ-dpm)₂ [X = Cl (2a), Br (2b), I (2c)] using dpm to give, respectively, Pd₂X₂(dpm)₂ [X = Cl (1a), Br (1b), I (1c)] and dpm(S) (process 2 → 1): [More abstract follows which cannot be rendered here; please see pp.3+ of the accompanying pdf file].
SUSY QM, symmetries and spectrum generating algebras for two-dimensional systems
Creators: name: Martinez, D
name: Mota, R D
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show in a systematic and clear way how factorization methods can be used to construct the generators for hidden and dynamical symmetries. This is shown by studying the 2D problems of hydrogen atom, the isotropic harmonic oscillator and the radial potential $Aρ^{2ζ-2}-Bρ^{ζ-2}$. We show that in these cases the non-compact (compact) algebra corresponds to so(2,1) (su(2)).
Correlated electrons in a Crystalline Topological insulator
Creators: name: Manghi, Franca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the effects of e-e interaction in a 3D Crystalline Topological Insulator by adding on-site repulsion to the single-particle Hamiltonian and solving the many-body problem within Cluster Perturbation Theory. The goal is to clarify how many body effects modify the topological phase that stems from the crystal symmetries. Tuning the strength of the on-site interaction we show that band inversion disappears in the bulk and surface states loose their metallic character.
Η έννοια της κίνησης στο Γ΄ και Δ΄ βιβλίο των Φυσικών του Αριστοτέλη
Creators: name: Γκαντζιάς, Αναστάσιος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Κίνηση
Μεταβολή
Φύση
Μotion
Change
Nature

description: Σκοπός της παρούσας μεταπτυχιακής εργασίας ήταν η μελέτη και η περιγραφή της σκέψης του Αριστοτέλη, σχετικά με το θέμα της κίνησης και της μεταβολής που συμβαίνει στον φυσικό κόσμο που μας περιβάλλει. Συγκεκριμένα μελετήσαμε και παρουσιάσαμε το Τρίτο και Τέταρτο βιβλίο των Φυσικών του Αριστοτέλη. Στο Τρίτο βιβλίο παρακολουθήσαμε τον συλλογισμό του φιλοσόφου για την κίνηση και τη μεταβολή, όπου η σκέψη ότι η φύση είναι αρχή κίνησης και μεταβολής εμφανίζεται σε όλα τα επιχειρήματά του στην προσπάθειά του να αποδείξει την επιστημονική εγκυρότητα της θεωρίας του. Ακολούθως μελετά το ζήτημα της θεωρίας σχετικά με το άπειρο, όπου εξετάζει τις προγενέστερες θεωρίες , τις απορρίπτει και καταλήγει στο συμπέρασμα ότι το άπειρο είναι ένα γνώρισμα που ανήκει στα όντα και ο τρόπος ύπαρξής του δυνητικός. Στο Τέταρτο βιβλίο των Φυσικών μελετήσαμε τα συνακόλουθα της κίνησης, τον τόπο, το κενό και τον χρόνο. Όλα τα συνακόλουθα της κίνησης τα εξετάζει ο φιλόσοφος με απόλυτη λογική και επιστημονικά επιχειρήματα, ώστε να αποδείξει ότι η κίνηση και η μεταβολή συντελούνται στο φυσικό κόσμο μέσα από αλληλεπιδραστικές σχέσεις.
description: The aim of this thesis was to study and describe the thinking of Aristotle, on the subject of motion and change happening in the natural world that surrounds us. Specifically studied and presented the third and fourth book of Aristotle's Physics. In the third book we watched the reasoning of the philosopher to move and change, where the idea that nature is the principle of movement and change occurs in all arguments in an attempt to prove the scientific validity of the theory. Subsequently studying the issue of theory about the infinite, which examines the earlier theories, rejects and concludes that infinity is an attribute that belongs to beings and how the potential existence. In the Fourth Book of Natural studied the subsequent movement, the place, the time and space. All subsequent motion considered by the philosopher with absolute logic and scientific arguments to prove that the move and the change occurring in the natural world through interactive relationships.
A Finite de Finetti Theorem for Infinite-Dimensional Systems
Creators: name: D'Cruz, Christian
name: Osborne, Tobias J.
name: Schack, Ruediger
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We formulate and prove a de Finetti representation theorem for finitely exchangeable states of a quantum system consisting of k infinite-dimensional subsystems. The theorem is valid for states that can be written as the partial trace of a pure state chosen from a family of subsets C_n of the full symmetric subspace for $n$ subsystems. We show that such states become arbitrarily close to mixtures of pure power states as n increases. We give a second equivalent characterization of the family C_n.
description: 4 pages, 2 figures
Global rigidity for totally nonsymplectic Anosov Z^k actions
Creators: name: Kalinin, Boris
name: Sadovskaya, Victoria
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 37C15, 37D99, 58R99

description: We consider a totally nonsymplectic Anosov action of Z^k which is either uniformly quasiconformal or pinched on each coarse Lyapunov distribution. We show that such an action on a torus is C^\infty--conjugate to an action by affine automorphisms. We also obtain similar global rigidity results for actions on an arbitrary compact manifold assuming that the coarse Lyapunov foliations are jointly integrable.
description: This is the version published by Geometry & Topology on 24 July 2006
Κατάτμηση των εγκεφαλικών δομών ιππόκαμπου αμυγδαλής από μαγνητικές τομογραφίες ανθρώπινου εγκεφάλου
Creators: name: Ζαφειρόπουλος, Αναστάσιος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: κατάτμηση ιατρικής εικόνας
ιππόκαμπος, αμυγδαλή
level-sets
medical image segmentation
hippocampus, amygdala

description: Μια από τις πιο σημαντικές ερευνητικές κατευθύνσεις του κλάδου της επεξεργασίας ιατρικής εικόνας, είναι ο αυτόματος διαχωρισμός και η κατάτμηση συγκεκριμένων εγκεφαλικών δομών. Στη συγκεκριμένη διπλωματική εργασία, εξετάζονται δύο γειτονικές δομές του ανθρώπινου εγκεφάλου, ο ιππόκαμπος και η αμυγδαλή. Η διαδικασία της αυτόματης κατάτμησης που παρουσιάζεται προσπαθεί να μιμηθεί την ανθρώπινη λογική κατά την διαδικασία διαχωρισμού αντικειμένων με ασαφή όρια μεταξύ τους. Η αντίληψη του ανθρώπου σε τέτοιες περιπτώσεις βασίζεται κατά μεγάλο βαθμό, στην εκ των προτέρων γνώση των μορφολογικών χαρακτηριστικών ενός αντικείμενου και στην ικανότητά του να λαμβάνει αποφάσεις διαχωρισμού, βάσει της εκπαίδευσης του, σε ομοειδή αντικείμενα. Ο βαθμός στον οποίο εμπιστευόμαστε την εκ των προτέρων γνώση συνδέεται άμεσα με την ποιότητα της πληροφορίας που φέρει η εικόνα την οποία μελετάμε. Για να επιτευχθεί η αυτοματοποιημένη κατάτμηση, χρησιμοποιείται ένα τροποποιημένο ενεργειακό μοντέλο από τη θεωρία των level-sets το οποίο συνδυάζει τις παραπάνω πληροφορίες και ταυτόχρονα εισάγει χωρικούς περιορισμούς στην εξέλιξη των μοντέλων των πολλαπλών δομών.
description: One of the most important research aspects in medical image processing is automatic segmentation and isolation of particular brain structures. This thesis examines the segmentation process of two neighboring structures of the human brain, hippocampus and amygdala. The presented segmentation method mimics human logic. Initially, the algorithm is trained by using manually segmented images from magnetic resonance imaging (MRI) brain scans. Thus, general shape, spatial distribution of structures' mass and MRI intensity based features are extracted from the training set. Then, a parametrized level-set evolution model is used in order to extract boundaries of the structures, which combines information based on the MRI intensity in conjunction with prior knowledge of the training process.
A unified description of initial and final state interactions in heavy ion collisions
Creators: name: Mehtar-Tani, Yacine
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have investigated the gauge field of a fast moving projectile passing through a dense medium. We provide a simple and unified derivation, in light cone gauge, of the gluon production cross-section in proton-nucleus (initial state interactions), and the radiative gluon spectrum of a hard parton produced in a nucleus-nucleus collision (final state interactions). Finally, we discuss the validity of the eikonal approximation in proton-nucleus collisions at RHIC energies.
description: 8 pages, 2 figures. talk given at International Conference on Strong and Electroweak Matter (SEWM 2006), Upton, New York, 10-13 May 2006