cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Searching for low radio-frequency gravitational wave counterparts in wide-field LOFAR data
Creators: name: Gourdji, K.
name: Rowlinson, A.
name: Wijers, R. A. M. J.
name: Broderick, J. W.
name: Shulevski, A.
name: Jonker, P. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The electromagnetic counterparts to gravitational wave (GW) merger events are highly sought after, but difficult to find owing to large localization regions. In this study, we present a strategy to search for compact object merger radio counterparts in wide-field data collected by the Low-Frequency Array (LOFAR). In particular, we use multi-epoch LOFAR observations centred at 144 MHz spanning roughly 300 deg$^2$ at optimum sensitivity of a since retracted neutron star-black hole merger candidate detected during O2, the second Advanced Ligo-Virgo GW observing run. The minimum sensitivity of the entire (overlapping) 1809 deg$^2$ field searched is 50 mJy and the false negative rate is 0.1 per cent above 200 mJy. We do not find any transients and thus place an upper limit at 95 per cent confidence of 0.02 transients per square degree above 20 mJy on one, two and three month timescales, which are the most sensitive limits available to date. Finally, we discuss the prospects of observing GW events with LOFAR in the upcoming GW observing run and show that a single multi-beam LOFAR observation can probe the full projected median localization area of binary neutron star mergers down to a median sensitivity of at least 8 mJy.
description: Accepted version (in MNRAS)
Impact of dimensionless numbers on the efficiency of MRI-induced turbulent transport
Creators: name: Lesur, G.
name: Longaretti, P-Y.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The magneto-rotational instability is presently the most promising source of turbulent transport in accretion disks. However, some important issues still need to be addressed to quantify the role of MRI in disks; in particular no systematic investigation of the role of the physical dimensionless parameters of the problem on the dimensionless transport has been undertaken yet. First, we complete existing investigations on the field strength dependence by showing that the transport in high magnetic pressure disks close to marginal stability is highly time-dependent and surprisingly efficient. Second, we bring to light a significant dependence of the global transport on the magnetic Prandtl number, with $α\propto Pm^δ$ for the explored range: $0.12
description: 11 pages, 11 figures, accepted to MNRAS
title: Differentiation of 16-O and 18-O by LIBS measurement of Aluminum-Monoxide molecular emissions
Creators: name: Ellersdorfer, Elias
Publisher: name: TU Wien
Year: 2022
Subjects: subject: LIBS
subject: molecular emssion
subject: isotopic shift

description: A possible approach to analyze water absorption in thin-film polymers is to measure the content of oxygen introduced in the form of water. For this purpose, a differentiation between initial oxygen content (e.g. from functional groups in polymers) and oxygen resulting from water absorption by isotopic labeling is necessary. Conventional techniques to analyze water contents require bulk samples or do not allow spatially resolved analysis on thin-films.Laser-Induced-Breakdown-Spectroscopy (LIBS) is a well-suited technique to perform spatially resolved analysis and measurements on molecular emission bands. A pronounced isotopic shift for AlO molecular emission bands in LIBS spectra is reported. So far, AlO bands have only been measured on samples, where aluminum and oxygen already are present in the form of a chemical compound, such as in Al2O3. This work focused on the proof of concept regarding the generation of a laser-induced aluminum plasma (LIP) and external insertion of H218O into the LIP. H218O works as a source of oxygen and allows to introduce oxygen directly into the aluminum plasma. This way, both separated components are brought together and a reaction between aluminum and oxygen is forced, resulting in AlO molecular emission.Thus differentiation of generated Al18O and Al16O bands, resulting from natural abundant 16O, can be realized. Conducted experiments included the generation of an isotopic shift in AlO emission bands and investigation of a possible correlation between introduced amounts of oxygen and signal intensities, thus investigating the possibilities for quantification. Within this work, the adjustment of necessary experiment parameters is shown. The experiments demonstrate the possibility of external H218O introduction direct into the LIP and thus differentiation of Al16O and Al18O emission bands via the isotopic shift. Varying amounts of introduced H218O produces different signal intensities in recorded Al18Obands, allowing the application of a simple calibration method. The discussed method requires optimization and further studies to achieve application for thin-film polymer analysis.
Could a Gamma Line Betray the Mass of Light Dark Matter?
Creators: name: Orloff, Jean
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the pair annihilation cross section of light dark matter scalar particles into two photons, and discuss the detectability of the monochromatic line associated with these annihilations.
description: Proceedings for the XLIInd Rencontres de Moriond "Electroweak Interactions and Unified Theories"
Statistics of neutrinos and the double beta decay
Creators: name: Barabash, A. S.
name: Dolgov, A. D.
name: Dvornicky, R.
name: Simkovic, F.
name: Smirnov, A. Yu.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We assume that the Pauli exclusion principle is violated for neutrinos, and thus, neutrinos obey at least partly the Bose-Einstein statistics. The parameter sin^2 chi is introduced that characterizes the bosonic (symmetric) fraction of the neutrino wave function. Consequences of the violation of the exclusion principle for the two-neutrino double beta decays are considered. This violation strongly changes the rates of the decays and modifies the energy and angular distributions of the emitted electrons. Pure bosonic neutrinos are excluded by the present data. In the case of partly bosonic (or mixed-statistics) neutrinos the analysis of the existing data allows to put the conservative upper bound sin^2 chi < 0.6. The sensitivity of future measurements of the two-neutrino double beta decay to sin^2 chi is evaluated.
description: 25 pages including 8 eps figures
Improving radioactive contaminant identification through the analysis of delayed coincidences with an $α$-spectrometer
Creators: name: Baccolo, G.
name: Barresi, A.
name: Beretta, M.
name: Chiesa, D.
name: Nastasi, M.
name: Pagnanini, L.
name: Pozzi, S.
name: Previtali, E.
name: Sisti, M.
name: Terragni, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In the framework of rare event searches, the identification of radioactive contaminants in ultra-pure samples is a challenging task, because the signal is often at the same level of the instrumental background. This is a rather common situation for $α$-spectrometers and other detectors used for low-activity measurements. In order to obtain the target sensitivity without extending the data taking live-time, analysis strategies that highlight the presence of the signal sought should be developed. In this paper, we show how to improve the contaminant tagging capability relying on the time-correlation of radioactive decay sequences. We validate the proposed technique by measuring the impurity level of both contaminated and ultra-pure copper samples, demonstrating the potential of this analysis tool in disentangling different background sources and providing an effective way to mitigate their impact in rare event searches.
Decays, contact P-wave interactions and hyperfine structure in Omega- exotic atoms
Creators: name: Krivoruchenko, M. I.
name: Faessler, Amand
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Contact $P$-wave interactions connected to the Larmor interaction of a magnetic dipole and Thomas spin precession in the filed of an electric quadrupole are described and their implications for spectroscopy of exotic $Ω^{-}$-atoms are studied. In order to evaluate the magnitude of the contact $P$-wave interactions as compared to the conventional long-range interactions and the sensitivity of spectroscopic data to the $Ω^{-}$-hyperon quadrupole moment, we consider $2P$ states of $Ω^{-}$ atoms formed with light stable nuclei with spins $I \geq 1/2$ and atomic numbers $Z \leq 10$. The energy level splitting caused by the contact interactions is 2-5 orders of magnitude smaller than the conventional long-range interactions. Strong decay widths of $pΩ^{-}$ atoms due to reactions $pΩ^{-} \to ΛΞ^{0}$ and $pΩ^{-} \to ΣΞ$, induced by $t$-channel kaon exchanges, are calculated. $Ω^{-}$ atoms formed with the light nuclei have strong widths 5-6 orders of magnitude higher than splitting caused by the contact interactions. The low-$L$ pattern in the energy spectra of intermediate- and high-$Z$ $Ω^{-}$ atoms thus cannot be observed. The $Ω^{-}$ quadrupole moment can be measured by observing $X$-rays from circular transitions between high-$L$ levels in $Ω^{-}$ exotic atoms. The effect of strong interactions in $^{208}$Pb$Ω^{-}$ atoms is negligible starting from $L \sim 10$. The contact $P$-wave interactions exist in ordinary atoms and $μ$-meson atoms.
description: LaTeX 49 pages, 3 eps figures, replaced with published version
Background study for the pn-CCD detector of CERN Axion Solar Telescope
Creators: name: Cebrián, S.
name: Rodríguez, A.
name: Kuster, M.
name: Beltrán, B.
name: Carmona, J. M.
name: Gómez, H.
name: Hartmann, R.
name: Irastorza, I. G.
name: Kotthaus, R.
name: Luzón, G.
name: Morales, J.
name: de Solórzano, A. Ortiz
name: Ruz, J.
name: Strüder, L.
name: Villar, J. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The CERN Axion Solar Telescope (CAST) experiment searches for axions from the Sun converted into photons with energies up to around 10 keV via the inverse Primakoff effect in the high magnetic field of a superconducting Large Hadron Collider (LHC) prototype magnet. A backside illuminated pn-CCD detector in conjunction with an X-ray mirror optics is one of the three detectors used in CAST to register the expected photon signal. Since this signal is very rare and different background components (environmental gamma radiation, cosmic rays, intrinsic radioactive impurities in the set-up, ...) entangle it, a detailed study of the detector background has been undertaken with the aim to understand and further reduce the background level of the detector. The analysis is based on measured data taken during the Phase I of CAST and on Monte Carlo simulations of different background components. This study will show that the observed background level (at a rate of (8.00+-0.07)10^-5 counts/cm^2/s/keV between 1 and 7 keV) seems to be dominated by the external gamma background due to usual activities at the experimental site, while radioactive impurities in the detector itself and cosmic neutrons could make just smaller contribution.
description: Comments: 10 pages, 9 figures and images, submitted to Astroparticle Physics
Extremal Problems in Minkowski Space related to Minimal Networks
Creators: name: Swanepoel, Konrad J
Publisher: name: arXiv
Year: 2007
Subjects: subject: Metric Geometry (math.MG)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 52A40 (Primary) 52A21, 49Q10 (Secondary)

description: We solve the following problem of Z. Füredi, J. C. Lagarias and F. Morgan [FLM]: Is there an upper bound polynomial in $n$ for the largest cardinality of a set S of unit vectors in an n-dimensional Minkowski space (or Banach space) such that the sum of any subset has norm less than 1? We prove that |S|\leq 2n and that equality holds iff the space is linearly isometric to \ell^n_\infty, the space with an n-cube as unit ball. We also remark on similar questions raised in [FLM] that arose out of the study of singularities in length-minimizing networks in Minkowski spaces.
description: 6 pages. 11-year old paper. Implicit question in the last sentence has been answered in Discrete & Computational Geometry 21 (1999) 437-447
A mass-, kinetic energy- and helicity-conserving mimetic dual-field discretization for three-dimensional incompressible Navier-Stokes equations, part I: Periodic domains
Creators: name: Zhang, Yi
name: Palha, Artur
name: Gerritsma, Marc
name: Rebholz, Leo G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We introduce a mimetic dual-field discretization which conserves mass, kinetic energy and helicity for three-dimensional incompressible Navier-Stokes equations. The discretization makes use of a conservative dual-field mixed weak formulation where two evolution equations of velocity are employed and dual representations of the solution are sought for each variable. A temporal discretization, which staggers the evolution equations and handles the nonlinearity such that the resulting discrete algebraic systems are linear and decoupled, is constructed. The spatial discretization is mimetic in the sense that the finite dimensional function spaces form a discrete de Rham complex. Conservation of mass, kinetic energy and helicity in the absence of dissipative terms is proven at the discrete level. Proper dissipation rates of kinetic energy and helicity in the viscous case is also proven. Numerical tests supporting the method are provided.
description: 26 pages, 11 figures
Water resources planning in the Fraser River basin : an assessment of the principles in practice 1948-1989
Creators: name: Barrons, Jeffrey B.
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this thesis was to assess the evolution of water resources planning in the Fraser River basin. This assessment was done by first, identifying the principles of water resources management and detailing their history of acceptance in the water management literature. The history of water resources planning in the Fraser River basin, more specifically the history of area planning in the basin, is then examined. The plans were then assessed using the principles of water resources planning as the criteria. The primary conclusion drawn from the assessment is that the evolution of water resources planning in the Fraser River basin has paralleled that of water resources planning in the literature as it pertains to the acceptance of the principles of water resources planning. The thesis concludes by offering insights into what seemed to work and what did not work in incorporating the principles into water resources planning and management in the Fraser River basin.
On universal C^*-algebras generated by n projections with scalar sum
Creators: name: Shulman, Tatiana
Publisher: name: arXiv
Year: 2007
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46 L05, 46L35

description: We study the universal C^*-algebras generated by n projections $p_1, >..., p_n$ subject to the relation $p_1+... p_n = λ1$, $λ\in \mathbb R$. The questions of when these C^*-algebras are type I, nuclear or exact are considered. It is proved also that among these algebras there is continuum of mutually nonisomorphic ones.
description: 10 pages
The pseudo-effective cone of a non-Kählerian surface and applications
Creators: name: Teleman, Andrei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 32J15; 32Q57; 32L05; 32G13

description: We describe the positive cone and the pseudo-effective cone of a non-Kählerian surface. We use these results for two types of applications: - Describe the set $σ(X)$ of possible total Ricci scalars associated with Gauduchon metrics of fixed volume 1 on a fixed non-Kähhlerian surface, and decide whether the assignment $X\mapstoσ(X)$ is a deformation invariant. - Study the stability of the canonical extension $$0\to {\cal K}_X\to {\cal A}\to{\cal O}_X\to 0$$ of a class VII surface $X$ with positive $b_2$. This extension plays an important role in our strategy to prove the GSS conjecture using gauge theoretical methods.
description: LaTeX, 25 pages; rv: minor correction in the proof of Remark 4.2
Adiabatic quantum search with atoms in a cavity driven by lasers
Creators: name: Daems, D.
name: Guérin, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an implementation of the quantum search algorithm of a marked item in an unsorted list of N items by adiabatic passage in a cavity-laser-atom system. We use an ensemble of N identical three-level atoms trapped in a single-mode cavity and driven by two lasers. In each atom, the same level represents a database entry. One of the atoms is marked by having an energy gap between its two ground states. Appropriate time delays between the two laser pulses allow one to populate the marked state starting from an initial entangled state within a decoherence-free adiabatic subspace. The time to achieve such a process is shown to exhibit the Grover speedup.
description: 5 pages, 3 figures
Optimizing future imaging survey of galaxies to confront dark energy and modified gravity models
Creators: name: Yamamoto, Kazuhiro
name: Parkinson, David
name: Hamana, Takashi
name: Nichol, Robert C.
name: Suto, Yasushi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider the extent to which future imaging surveys of galaxies can distinguish between dark energy and modified gravity models for the origin of the cosmic acceleration. Dynamical dark energy models may have similar expansion rates as models of modified gravity, yet predict different growth of structure histories. We parameterize the cosmic expansion by the two parameters, $w_0$ and $w_a$, and the linear growth rate of density fluctuations by Linder's $γ$, independently. Dark energy models generically predict $γ\approx 0.55$, while the DGP model $γ\approx 0.68$. To determine if future imaging surveys can constrain $γ$ within 20 percent (or $Δγ<0.1$), we perform the Fisher matrix analysis for a weak lensing survey such as the on-going Hyper Suprime-Cam (HSC) project. Under the condition that the total observation time is fixed, we compute the Figure of Merit (FoM) as a function of the exposure time $\texp$. We find that the tomography technique effectively improves the FoM, which has a broad peak around $\texp\simeq {\rm several}\sim 10$ minutes; a shallow and wide survey is preferred to constrain the $γ$ parameter. While $Δγ< 0.1$ cannot be achieved by the HSC weak-lensing survey alone, one can improve the constraints by combining with a follow-up spectroscopic survey like WFMOS and/or future CMB observations.
description: 18 pages, typos corrected
The four-loop DRED gauge beta-function and fermion mass anomalous dimension for general gauge groups
Creators: name: Jack, Ian
name: Jones, D. R. Timothy
name: Kant, Philipp
name: Mihaila, Luminita
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present four-loop results for the gauge beta-function and the fermion mass anomalous dimension for a gauge theory with a general gauge group and a multiplet of fermions transforming according to an arbitrary representation, calculated using the dimensional reduction scheme. In the special case of a supersymmetric theory we confirm previous calculations of both the gauge beta-function and the gaugino mass beta-function.
description: 44 pages, added references (v2) minor changes (v3)
Distance-duality in theories with a nonminimal coupling to gravity
Creators: name: Azevedo, R. P. L.
name: Avelino, P. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We show that gravitational theories with a nonminimal coupling (NMC) to the matter fields lead to a violation of Etherington's distance-duality relation, which relates the luminosity and angular diameter distances. We derive constraints on power-law and exponential NMC models using existing measurements of type Ia supernovae and baryon acoustic oscillations throughout the redshift range $0
description: 9 pages, 6 figures, 2 tables; updated to match version published in PRD
Universal compiling and (No-)Free-Lunch theorems for continuous variable quantum learning
Creators: name: Volkoff, Tyler
name: Holmes, Zoë
name: Sornborger, Andrew
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum compiling, where a parameterized quantum circuit is trained to learn a target unitary, is an important primitive for quantum computing that can be used as a subroutine to obtain optimal circuits or as a tomographic tool to study the dynamics of an experimental system. While much attention has been paid to quantum compiling on discrete variable hardware, less has been paid to compiling in the continuous variable paradigm. Here we motivate several, closely related, short depth continuous variable algorithms for quantum compilation. We analyse the trainability of our proposed cost functions and numerically demonstrate our algorithms by learning arbitrary Gaussian operations and Kerr non-linearities. We further make connections between this framework and quantum learning theory in the continuous variable setting by deriving No-Free-Lunch theorems. These generalization bounds demonstrate a linear resource reduction for learning Gaussian unitaries using entangled coherent-Fock states and an exponential resource reduction for learning arbitrary unitaries using Two-Mode-Squeezed states.
description: 20 pages, 7 figures
Recursive weighted treelike networks
Creators: name: Zhang, Zhongzhi
name: Zhou, Shuigeng
name: Chen, Lichao
name: Guan, Jihong
name: Fang, Lujun
name: Zhang, Yichao
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We propose a geometric growth model for weighted scale-free networks, which is controlled by two tunable parameters. We derive exactly the main characteristics of the networks, which are partially determined by the parameters. Analytical results indicate that the resulting networks have power-law distributions of degree, strength, weight and betweenness, a scale-free behavior for degree correlations, logarithmic small average path length and diameter with network size. The obtained properties are in agreement with empirical data observed in many real-life networks, which shows that the presented model may provide valuable insight into the real systems.
New method of probing an oscillating EDM induced by axionlike dark matter using an RF Wien Filter in storage rings
Creators: name: Kim, On
name: Semertzidis, Yannis K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A hypothetical pseudo-scalar particle axion, which is an immediate result of the Peccei-Quinn solution to the strong CP problem, may couple to gluons and lead to an oscillating electric dipole moment (EDM) of fundamental particles. This paper proposes a novel method of probing the axion-induced oscillating EDM in storage rings, using a radiofrequency (RF) Wien Filter. The Wien Filter at the frequency of the sidebands of the axion and $g-2$ frequency, $f_\text{axion} \pm f_{g-2}$, generates a spin resonance in the presence of an oscillating EDM, as confirmed both by an analytical estimation of the spin equations and independently by simulation. A brief systematic study also shows that this method is unlikely to be limited by Wien Filter misalignment issues.
description: 13 pages, 12 figures
Thick branes in the scalar-tensor representation of $f(R,T)$ gravity
Creators: name: Rosa, João Luís
name: Marques, Matheus A.
name: Bazeia, Dionisio
name: Lobo, Francisco S. N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Braneworld scenarios consider our observable universe as a brane embedded in a five-dimensional bulk. In this work, we consider thick braneworld systems in the recently proposed dynamically equivalent scalar-tensor representation of $f(R,T)$ gravity, where $R$ is the Ricci scalar and $T$ the trace of the stress-energy tensor. In the general $f\left(R,T\right)$ case we consider two different models: a brane model without matter fields where the geometry is supported solely by the gravitational fields, and a second model where matter is described by a scalar field with a potential. The particular cases for which the function $f\left(R,T\right)$ is separable in the forms $F\left(R\right)+T$ and $R+G\left(T\right)$, which give rise to scalar-tensor representations with a single auxiliary scalar field, are studied separately. The stability of the gravitational sector is investigated and the models are shown to be stable against small perturbations of the metric. Furthermore, we show that in the $f\left(R,T\right)$ model in the presence of an extra matter field, the shape of the graviton zero-mode develops internal structure under appropriate choices of the parameters of the model.
description: 14 pages, 12 figures
Τα καλλιτεχνικά εργαστήρια από την περιοχή του Γράμμου κατά το 16ο και 17ο αιώνα: ζωγράφοι από το Λινοτόπι, τη Γράμμοστα, τη Ζέρμα και το Μπουρμπουτσικό
Creators: name: Τσάμπουρας, Θεοχάρης Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Γράμμος
Λινοτόπι
Μεταβυζαντινή ζωγραφική
Ορθόδοξη τέχνη
Grammos
Linotopi
post-Byzantine painting
Orthodox art

description: Το αντικείμενο της παρούσας διδακτορικής διατριβής αφορά στην καλλιτεχνική δραστηριότητα των εργαστηρίων των ζωγράφων που κατάγονται από την περιοχή του Γράμμου και συγκεκριμένα από τους οικισμούς Γράμμοστα, Λινοτόπι, Ζέρμα και Μπουρμπουτσικό κατά τον 16ο και τον 17ο αιώνα. Στην παρούσα μελέτη αντιμετωπίζονται τα έργα των ζωγράφων του Γράμμου ομαδοποιημένα, συνολικά και με συνθετικό τρόπο και παρακολουθείται η ολοκληρωμένη πορεία τους από το ξεκίνημα και το απόγειο της δραστηριότητάς τους έως την παρακμή τους. Εξετάζονται αναλυτικά εβδομήντα ένα (71) σύνολα που επιμερίζονται σε πενήντα επτά (57) ναούς, τα οποία στέκονται αφορμή για την παρουσίαση του ιστορικού και καλλιτεχνικού πλαισίου της εποχής, αλλά και την έρευνα ειδικότερων ζητημάτων, όπως των συνεργασιών των ζωγράφων, των μεταξύ τους ομαδοποιήσεων και συσχετισμών, των σταδίων εκτέλεσης μιας παραγγελίας και των μετακινήσεων των τεχνιτών. Τέλος, μέσα από τη μελέτη του πελατειακού δικτύου της εποχής και των εικαστικών καταβολών της τέχνης των ζωγράφων προτείνεται συμπερασματικά η ένταξη των εργαστηρίων του Γράμμου σε μια κοινή καλλιτεχνική γλώσσα των Βαλκανίων που εμφανίζεται από τέλη του 16ου έως και τα τέλη του 17ου αιώνα.
description: This doctoral dissertation examines the activity of the artistic workshops originating from Mount Grammos and particularly from the mountain villages of Grammosta, Linotopi, Zerma and Bourboutsiko in the sixteenth and seventeenth century. The artists' works are organized, categorized and presented for the first time as a whole, giving the chance to recreate the workshops' course from their emergence in the sixteenth century until their decline in the late seventeenth century. The 71 works analyzed in this dissertation, located in 57 different churches and scattered all over the Balkan Peninsula, are contextualized in their historical and artistic background. Through the examination of the collaborations between the painters, their travels throughout the Balkans, and the networks of Orthodox art patronage the Grammos painters' groups are viewed as a part of a common artistic language created in the Balkans from the late sixteenth until up to the late seventeenth century.
Star formation histories of resolved galaxies
Creators: name: Tosi, Monica
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The impact of HST photometry and European astronomy in studies concerning the star formation histories of resolved galaxies is described. Our current knowledge of the star formation history of systems within 10-20 Mpc, as derived from the colour-magnitude diagrams of their resolved stellar populations, is reviewed, as well as the impact of these results on our understanding of galaxy evolution.
description: 8 pages, 3 figures, invited review to appear in the Proceedings of the 41st ESLAB Symposium "The impact of HST on European Astronomy"
Selective cloning of Gaussian states by linear optics
Creators: name: Olivares, Stefano
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the performances of a selective cloning machine based on linear optical elements and Gaussian measurements, which allows to clone at will one of the two incoming input states. This machine is a complete generalization of a 1 to 2 cloning scheme demonstrated by U. L. Andersen et al. [Phys. Rev. Lett. vol. 94, 240503 (2005)]. The input-output fidelity is studied for generic Gaussian input state and the effect of non-unit quantum efficiency is also taken into account. We show that if the states to be cloned are squeezed states with known squeezing parameter, then the fidelity can be enhanced using a third suitable squeezed state during the final stage of the cloning process. A binary communication protocol based on the selective cloning machne is also discussed.
description: 6 pages, 6 figures
Unbiased Monte Carlo Cluster Updates with Autoregressive Neural Networks
Creators: name: Wu, Dian
name: Rossi, Riccardo
name: Carleo, Giuseppe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Efficient sampling of complex high-dimensional probability distributions is a central task in computational science. Machine learning methods like autoregressive neural networks, used with Markov chain Monte Carlo sampling, provide good approximations to such distributions, but suffer from either intrinsic bias or high variance. In this Letter, we propose a way to make this approximation unbiased and with low variance. Our method uses physical symmetries and variable-size cluster updates which utilize the structure of autoregressive factorization. We test our method for first- and second-order phase transitions of classical spin systems, showing its viability for critical systems and in the presence of metastable states.
description: 12 pages, 9 figures
Composite Flavon-Higgs Models
Creators: name: Chung, Yi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a composite Higgs model based on the $SU(6)/Sp(6)$ coset, where an $U(1)$ subgroup of $Sp(6)$ is identified as the flavor symmetry. A complex scalar field $s$, which is a pseudo-Nambu-Goldstone boson of the broken symmetry, carries a flavor charge and plays the role of a flavon field. The $U(1)_F$ flavor symmetry is then broken by a VEV of the flavon field, which leads to a small parameter and generates the mass hierarchy between the top and bottom quarks. A light flavon below the TeV scale can be naturally introduced, which provides a fully testable model for the origin of flavor hierarchy. A light flavon also leads to substantial flavor changing neutral currents, which are strongly constrained by the flavor precision tests. The direct search of additional scalar bosons can also be conducted in HL-LHC and future hadron colliders.
description: 12 pages, 1 figure, 3 tables; v2: two appendices added, matches version accepted for publication in PRD
Measurement of |V_us| using hadronic tau decays from BaBar & Belle
Creators: name: Banerjee, Swagato
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report on measurements of branching fractions for several hadronic tau decays to final states with kaons, which can be used to determine the strange quark mass and the element |V_us| of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are obtained from data collected with the BaBar and Belle detectors at the PEP-II and KEKB asymmetric-energy e+e- colliders at SLAC and KEK, respectively, both operating at center-of-mass energies near the Y(4S) resonance.
description: 5 pages, 1 figure, 1 table (To appear in the proceedings of International Kaon Conference '07)
Quasifree Lambda, Sigma^0, and Sigma^- electroproduction from 1,2H, 3,4He, and carbon
Creators: name: Dohrmann, F.
name: Ahmidouch, A.
name: Armstrong, C. S.
name: Arrington, J.
name: Asaturyan, R.
name: Avery, S.
name: Bailey, K.
name: Bitao, H.
name: Breuer, H.
name: Brown, D. S.
name: Carlini, R.
name: Cha, J.
name: Chant, N.
name: Christy, E.
name: Cochran, A.
name: Cole, L.
name: Crowder, J.
name: Danagoulian, S.
name: Elaasar, M.
name: Ent, R.
name: Fenker, H.
name: Fujii, Y.
name: Gan, L.
name: Garrow, K.
name: Geesaman, D. F.
name: Gueye, P.
name: Hafidi, K.
name: Hinton, W.
name: Juengst, H.
name: Keppel, C.
name: Liang, Y.
name: Liu, J. H.
name: Lung, A.
name: Mack, D.
name: Markowitz, P.
name: Mitchell, J.
name: Miyoshi, T.
name: Mkrtchyan, H.
name: Mtingwa, S. K.
name: Mueller, B.
name: Niculescu, G.
name: Niculescu, I.
name: Potterveld, D.
name: Raue, B. A.
name: Reimer, P. E.
name: Reinhold, J.
name: Roche, J.
name: Sarsour, M.
name: Sato, Y.
name: Segel, R. E.
name: Semenov, A.
name: Stepanyan, S.
name: Tadevosyan, V.
name: Tajima, S.
name: Tang, L.
name: Uzzle, A.
name: Wood, S.
name: Yamaguchi, H.
name: Yan, C.
name: Yuan, L.
name: Zeidman, B.
name: Zeier, M.
name: Zihlmann, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Kaon electroproduction from light nuclei and hydrogen, using 1H, 2H, 3He, 4He, and Carbon targets has been measured at Jefferson Laboratory. The quasifree angular distributions of Lambda and Sigma hyperons were determined at Q^2= 0.35(GeV/c)^2 and W= 1.91GeV. Electroproduction on hydrogen was measured at the same kinematics for reference.
description: 34 pages, 9 figures v2:minor grammatical changes, correcting typos
title: Intégrer l’animation japonaise pour travailler les mémoires plurielles dans l’enseignement de l’histoire au secondaire I :
title: l’exemple du film Le Tombeau des Lucioles d’Isao Takahata
titleType: Subtitle
title: Intégrer l’animation japonaise pour travailler les mémoires plurielles dans l’enseignement de l’histoire au secondaire I :
titleType: AlternativeTitle
Creators: name: Seixas Bento, Patrícia
Publisher: name: Unknown
Year: 0
Subjects: subject: animation japonaise
subject: Le tombeau des lucioles
subject: implication scolaire
subject: empathie (historique)
subject: mémoires plurielles
subject: Guerre du Pacifique

description: Ce mémoire professionnel porte sur la mise en oeuvre d’une séquence d’enseignement originale autour de l’animation japonaise et du manga en classe d’histoire. L’intérêt de ce projet didactique réside dans l’influence d’images animées proches de l’univers de nos élèves dans leurs apprentissages scolaires et d’un travail sur les mémoires plurielles propres aux événements traumatiques de la Guerre du Pacifique (1941-1945).Cette démarche a pour intention de donner de la saveur aux savoirs (Astolfi, 2014) et de se rapprocher de la zone proximale de développement des élèves (Vygotski, 1934). En ce sens, de nombreux auteurs recommandent l’utilisation du film d’animation japonais Le tombeau des lucioles d’Isao Takahata (1988) en classe d’histoire et, l’apport d’autres sources en vue d’une confrontation des discours, témoignages et mémoires propres aux représentations de ce conflit. Dans le cadre de cette recherche et de ces recommandations, il est question d’explorer trois hypothèses visant à mieux comprendre les enjeux d’une telle approche dans l’enseignement de l’histoire. Il est d’abord question de confirmer ou non, par l’exploitation d’un tel outil numérique, la meilleure implication des élèves dans les apprentissages liés à la discipline historique. Puis, de déterminer si les caractéristiques socio-démographiques des protagonistes de l’histoire animée ont une influence significative sur l’essor d’un sentiment d’empathie et de proximité chez les élèves à l’égard de l’expérience de la guerre. Pour finir, la confrontation de l’image animée à d’autres types de documents permettra de vérifier ou non, le développement d’un regard critique et pluriel chez les participants à l’enquête quant aux événements traumatiques liés à ce conflit. Les résultats de cette enquête s’appuient sur un échantillon de quatorze sujets d’une classe d’histoire de 11ème année HarmoS de niveau VG. Celle-ci est composée de cinq filles et de neuf garçons dont la moyenne d’âge est située à 15 ans.
Characteristics of phonon transmission across epitaxial interfaces: a lattice dynamic study
Creators: name: Wang, Jian
name: Wang, Jian-Sheng
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Phonon transmission across epitaxial interfaces is studied within the lattice dynamic approach. The transmission shows weak dependence on frequency for the lattice wave with a fixed angle of incidence. The dependence on azimuth angle is found to be related to the symmetry of the boundary interface. The transmission varies smoothly with the change of the incident angle. A critical angle of incidence exists when the phonon is incident from the side with large group velocities to the side with low ones. No significant mode conversion is observed among different acoustic wave branches at the interface, except when the incident angle is near the critical value. Our theoretical result of the Kapitza conductance $G_{K}$ across the Si-Ge (100) interface at temperature $T=200 $K is $4.6\times10^{8} {\rm WK}^{-1}{\rmm}^{-2}$. A scaling law $G_K \propto T^{2.87}$ at low temperature is also reported. Based on the features of transmission obtained within lattice dynamic approach, we propose a simplified formula for thermal conductanceacross the epitaxial interface. A reasonable consistency is found between the calculated values and the experimentally measured ones.
description: 8 figures
How a "Hit" is Born: The Emergence of Popularity from the Dynamics of Collective Choice
Creators: name: Sinha, Sitabhra
name: Pan, Raj Kumar
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: In recent times there has been a surge of interest in seeking out patterns in the aggregate behavior of socio-economic systems. One such domain is the emergence of statistical regularities in the evolution of collective choice from individual behavior. This is manifested in the sudden emergence of popularity or "success" of certain ideas or products, compared to their numerous, often very similar, competitors. In this paper, we present an empirical study of a wide range of popularity distributions, spanning from scientific paper citations to movie gross income. Our results show that in the majority of cases, the distribution follows a log-normal form, suggesting that multiplicative stochastic processes are the basis for emergence of popular entities. This suggests the existence of some general principles of complex organization leading to the emergence of popularity. We discuss the theoretical principles needed to explain this socio-economic phenomenon, and present a model for collective behavior that exhibits bimodality, which has been observed in certain empirical popularity distributions.
description: 17 pages, 14 figures, A version of the work is published in Econophysics and Sociophysics: Trends and Perspectives, (eds.) Bikas K. Chakrabarti, Anirban Chakraborti, Arnab Chatterjee; Wiley-VCH, Berlin (2006); Chapter-15, pages: 417-447
Numbersense: How to Use Big Data to your Advantage
Creators: name: สมชาย ศุภธาดา
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2019
Subjects: n/a

description: วารสารวิชาชีพบัญชี JAP, 15, 46 (มิถุนายน 62), 92
Resonant excitonic emission of a single quantum dot in the Rabi regime
Creators: name: Melet, R.
name: Voliotis, V.
name: Enderlin, A.
name: Roditchev, D.
name: Wang, X. L.
name: Guillet, T.
name: Grousson, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on coherent resonant emission of the fundamental exciton state in a single semiconductor GaAs quantum dot. Resonant regime with picoseconde laser excitation is realized by embedding the quantum dots in a waveguiding structure. As the pulse intensity is increased, Rabi oscillation is observed up to three periods. The Rabi regime is achieved owing to an enhanced light-matter coupling in the waveguide. This is due to a \emph{slow light effect} ($c/v_{g}\simeq 3000$), occuring when an intense resonant pulse propagates in a medium. The resonant control of the quantum dot fundamental transition opens new possibilities in quantum state manipulation and quantum optics experiments in condensed matter physics.
description: Submitted to Phys. Rev. Lett
On primes in arithmetic progression having a prescribed primitive root. II
Creators: name: Moree, Pieter
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11R45, 11N13, 11A07

description: Let a and f be coprime positive integers. Let g be an integer. Under the Generalized Riemann Hypothesis (GRH) it follows by a result of H.W. Lenstra that the set of primes p such that p=a(mod f) and g is a primitive root modulo p has a natural density. In this note this density is explicitly evaluated with an Euler product as result.
description: 11 pages, updated and streamlined version of Max-Planck preprint MPIM1998-57 (unpublished)
Superfluid-Insulator Transition of Strongly Interacting Fermi Gases in Optical Lattices
Creators: name: Zhai, Hui
name: Ho, Tin-Lun
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study a quantum phase transition between fermion superfluid (SF) and band insulator (BI) of fermions in optical lattices. The destruction of the band insulator is driven by the energy gain in promoting fermions from valance band to various conducting bands to form Cooper pairs. We show that the transition must take place in rather shallow lattice height, $V_{o}/E_{R}$ between 2.23 and 4.14. The latter is the prediction of mean field theory while the former is the value for opening a band gap. As one moves across resonance to the molecule side, the SF-BI transition evolves into the SF-Mott insulator transition of bosonic molecules. We shall also present the global phase diagram for SF-Insulator transition for the BCS-BEC family.
description: 4 pages, 4 figures
Quasiparticle nature of the Bose polaron at finite temperature
Creators: name: Pascual, Gerard
name: Boronat, Jordi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Bose polaron has attracted theoretical and experimental interest because the mobile impurity is surrounded by a bath that undergoes a superfluid-to-normal phase transition. Although many theoretical works have studied this system in its ground state, only few analyze its behavior at finite temperature. We have studied the effect of temperature on a Bose polaron system performing ab-initio Path Integral Monte Carlo simulations. This method is able to approach the critical temperature without losing accuracy, in contrast with perturbative approximations. We have calculated the polaron energy for the repulsive and attractive branches and we have observed an asymmetric behavior between the two branches. When the potential is repulsive, the polaron energy decreases when the temperature increases, and contrariwise for the attractive branch. Our results for the effective mass and the dynamical structure factor of the polaron show unambiguously that its quasiparticle nature disappears close to the critical temperature, in agreement with recent experimental findings. Finally, we have also estimated the fraction of bosons in the condensate as well as the superfluid fraction, and we have concluded that the impurity hinders the condensation of the rest of bosons.
description: 9 pages, 6 figures
Additional file 3 of Comparison of clinicopathological features and prognostic significance between synchronous multiple primary and solitary esophageal squamous cell carcinomas
Creators: name: Yang, Yueyang
name: Tang, Peng
name: Ma, Mingquan
name: Zhang, Hongdian
name: Wang, Haitong
name: Zhu, Kai
name: Xiao, Wanyi
name: Gong, Lei
name: Yu, Zhentao
Publisher: name: figshare
Year: 2022
Subjects: subject: Cell Biology
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Additional file 3: Supplementary Fig. 1. The receiver operating characteristic (ROC) curve showing the cutoff of relevant variables, including length of primary cancer (AUC = 0.638, SE =0.082, P = 0.105, 95%CI = 0.476-0.799) and dissection number of lymph nodes(AUC = 0.588, SE = 0.083, P = 0.299, 95%CI = 0.426-0.751).