cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mean flow of turbulent-laminar patterns in plane Couette flow
Creators: name: Barkley, Dwight
name: Tuckerman, Laurette S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: A turbulent-laminar banded pattern in plane Couette flow is studied numerically. This pattern is statistically steady, is oriented obliquely to the streamwise direction, and has a very large wavelength relative to the gap. The mean flow, averaged in time and in the homogeneous direction, is analysed. The flow in the quasi-laminar region is not the linear Couette profile, but results from a non-trivial balance between advection and diffusion. This force balance yields a first approximation to the relationship between the Reynolds number, angle, and wavelength of the pattern. Remarkably, the variation of the mean flow along the pattern wavevector is found to be almost exactly harmonic: the flow can be represented via only three cross-channel profiles as U(x,y,z) = U_0(y) + U_c(y) cos(kz) + U_s(y) sin(kz). A model is formulated which relates the cross-channel profiles of the mean flow and of the Reynolds stress. Regimes computed for a full range of angle and Reynolds number in a tilted rectangular periodic computational domain are presented. Observations of regular turbulent-laminar patterns in other shear flows -- Taylor-Couette, rotor-stator, and plane Poiseuille -- are compared.
Universal Algorithmic Intelligence: A mathematical top->down approach
Creators: name: Hutter, Marcus
Publisher: name: arXiv
Year: 2007
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Sequential decision theory formally solves the problem of rational agents in uncertain worlds if the true environmental prior probability distribution is known. Solomonoff's theory of universal induction formally solves the problem of sequence prediction for unknown prior distribution. We combine both ideas and get a parameter-free theory of universal Artificial Intelligence. We give strong arguments that the resulting AIXI model is the most intelligent unbiased agent possible. We outline how the AIXI model can formally solve a number of problem classes, including sequence prediction, strategic games, function minimization, reinforcement and supervised learning. The major drawback of the AIXI model is that it is uncomputable. To overcome this problem, we construct a modified algorithm AIXItl that is still effectively more intelligent than any other time t and length l bounded agent. The computation time of AIXItl is of the order t x 2^l. The discussion includes formal definitions of intelligence order relations, the horizon problem and relations of the AIXI theory to other AI approaches.
description: 70 pages
Results of the further analysis of Tien-Shan array data on the energy spectrum of primary cosmic rays at 2x10$^{13}$ - 3x10$^{17}$ eV
Creators: name: Gudkova, E.
name: Nesterova, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The energy spectrum of primary cosmic rays at energies between at 2x10$^{13}$ - 3x10$^{17}$ eV is presented according to data from the Tien Shan array on the basis of the detection of the number of electrons in extensive air showers. In the energy range 5x10$^{15}$ - 3x10$^{17}$ eV, the spectrum was obtained by means of the HADRON array and was extended to the region of lower energies from 2x10$^{13}$ eV on the basis of the results of an individual experiment. The changes in the slope of the spectrum in the energy range of 10$^{16}$ - 3x10$^{17}$ eV and a feature of this spectrum at about 1017 eV are analyzed in detail and are described. The spectrum in question is compared with the results obtained at some other arrays.
description: 4 pages, 3 figures
Constraining the Fast Radio Burst (FRB) properties using the joint distributions of dispersion measure and fluence of the events detected at Parkes, ASKAP, CHIME and UTMOST
Creators: name: Bhattacharyya, Siddhartha
name: Bharadwaj, Somnath
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Parkes, ASKAP, CHIME and UTMOST telescopes, which have all detected FRBs, each works at a different frequency and has a different detection criteria. Using simulations, we have combined the constraints from all four telescopes to identify an allowed range of model parameters $(α, \E33)$ for the FRB source population. Here $α$ is the spectral index and $\E33$ is the mean FRB energy in units of $10^{33} \, {\rm J}$ across a $2128 - 2848\; {\rm MHz}$ band in the FRB rest frame. We have considered several different FRB energy distributions, and also different scenarios for the scattering pulse broadening, the event rate density variation with $z$ and the host dispersion measure. We find that in all cases, the common allowed region includes the range $-3.9\leqα\leq-1.3$ and $0.42\leq\E33\leq1$. In all case, large values $α> 4$ and $\E33 >60$ are ruled out. Considering the allowed $(α, \E33)$ parameter range, we predict that CHIME is unlikely to detect an FRB with extra-galactic dispersion measure $(DM_{Ex})$ exceeding $3700\,{\rm pc\,cm}^{-3}$. A substantially larger $DM_{Ex}$ in the large FRB sample anticipated from CHIME would falsify the assumptions of the present analysis. Our analysis is expected to yield tighter parameter constraints with the advent of more FRB data.
description: 11 pages, 13 figures, accepted for publication in MNRAS
XXX Spin Chain: from Bethe Solution to Open Problems
Creators: name: Korepin, Vladimir E.
name: Patu, Ovidiu I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We present some open problems in the field of exactly solvable models. Two of the problems are related to the correlation functions of the XXX spin chain and the XXZ spin chain, one to the entropy of subsystems and one to the six vertex model with domain wall boundary conditions.
description: 11 pages. Talk presented at the Solvay workshop BETHE ANSATZ: 75 YEARS LATER, October 19-21, 2006, Brussels, Belgium
The Rotation Measure and 3.5mm Polarization of Sgr A*
Creators: name: Macquart, Jean-Pierre
name: Bower, Geoffrey C.
name: Wright, Melvyn C. H.
name: Backer, Donald C.
name: Falcke, Heino
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the detection of variable linear polarization from Sgr A* at a wavelength of 3.5mm, the longest wavelength yet at which a detection has been made. The mean polarization is 2.1 +/- 0.1% at a position angle of 16 +/- 2 deg with rms scatters of 0.4% and 9 deg over the five epochs. We also detect polarization variability on a timescale of days. Combined with previous detections over the range 150-400GHz (750-2000 microns), the average polarization position angles are all found to be consistent with a rotation measure of -4.4 +/- 0.3 x 10^5 rad/m^2. This implies that the Faraday rotation occurs external to the polarized source at all wavelengths. This implies an accretion rate ~0.2 - 4 x 10^-8 Msun/yr for the accretion density profiles expected of ADAF, jet and CDAF models and assuming that the region at which electrons in the accretion flow become relativistic is within 10 R_S. The inferred accretion rate is inconsistent with ADAF/Bondi accretion. The stability of the mean polarization position angle between disparate polarization observations over the frequency range limits fluctuations in the accretion rate to less than 5%. The flat frequency dependence of the inter-day polarization position angle variations also makes them difficult to attribute to rotation measure fluctuations, and suggests that both the magnitude and position angle variations are intrinsic to the emission.
description: Ap.J.Lett. accepted
Three co-researchers’ experiences during their first session of eye movement desensitization and reprocessing
Creators: name: Peterson, Brett
Publisher: name: University of British Columbia
Year: 2009

description: Eye Movement Desensitization and Reprocessing (EMDR; Shapiro, 1989a, 1989b, 1995) is a relatively new procedure used primarily for treating posttraumatic stress disorder (PTSD). This study is the first to systematically investigate the moment-to moment experiences of PTSD victims during their first treatment session. Using variations of Interpersonal Process Recall (Elliot, 1994), and Colaizzi's (1978) phenomenological research methodology, findings confirmed many of Shapiro's (1995) descriptions of experience, with nothing of a disconfirming nature being discovered. Three distinct patterns of co-researcher experience were identified, with one co-researcher reaching full in-session resolution of her baseline measures. Further, three broad categories of experience were discovered (Participant Experiences and Spectator Experiences [Cochran, 1990]; and Treatment Specific Effects); each of which was further found to consist of four dimensions, or components, of experience. Movement from the Participant to Spectator realm was consonant with co-researchers' working through, contextualizing and making meaning of trauma-related memories.
On continuous solutions of a problem of R.Schilling
Creators: name: Morawiec, Janusz
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 39B12, 39B22 (Primary)

description: The paper deals with continuous solutions of a Schilling's problem.
description: 6 pages
MISO LIMS : managing information for sequencing operations
Creators: name: Taschuk, Morgan
name: Cooke, Dillan
name: Armstrong, Heather
name: Masella, Andre
name: Varsava, Alexis
name: Jorgensen, Lars
Publisher: name: F1000 Research Limited
Year: 2019

description: MISO is a laboratory information management system designed for eukaryotic sequencing operations. It supports genomic, exomic, transcriptomic, methyl-omic, and CHiP-seq protocols; long reads and short reads; and microarrays. MISO incorporates a wide feature set useful for both large and small facilities to track their lab workflows in great detail. MISO has two primary goals: 1) to allow laboratory technicians to record their work accurately, without having to adapt their protocols to match the system’s model, with a minimum of data entry overhead and 2) to keep the associated metadata valid and structured enough to use for automation and other downstream applications.

Goal 1: Record laboratory activities
MISO is flexible enough to keep up with rapidly evolving research protocols and methods while simultaneously providing input validation and reducing the pain of data entry. Our detailed sample hierarchy mimics actual laboratory processes for receiving tissues, creating stocks and aliquots, propagating to sequencing libraries, pooling and loading onto a sequencer. Quality control measures, volume, and concentrations can be recorded for each entity. Everything corresponding to a physical specimen is also barcoded, located by freezer and shelf, and tracked by changelogs. MISO supports current instruments like the Illumina NovaSeq, 10X Chromium, and Oxford Nanopore PromethION as well as older models.

Goal 2: Facilitate analysis automation
A major goal of MISO was to encourage laboratory technicians to enter information in enough detail and with sufficient rigor to automate downstream analysis, particularly base calling and alignment. MISO provides in-browser validation to ensure that controlled vocabulary stays consistent. MISO also implements Pinery, which is a LIMS abstraction layer to allow read-only access to the metadata required for analysis and reporting.

Availability and Installation
The project is open-source and licensed under GPL-3.0: https://github.com/miso-lims/miso-lims. Installation, administration, and maintenance is through Docker containers and compose files.
Ultra-bright Quantum Photon Sources on Chip
Creators: name: Ma, Zhaohui
name: Chen, Jia-Yang
name: Li, Zhan
name: Tang, Chao
name: Sua, Yong Meng
name: Fan, Heng
name: Huang, Yu-Ping
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum photon sources of high rate, brightness, and purity are increasingly desirable as quantum information systems are quickly scaled up and applied to many fields. Using a periodically poled lithium niobate microresonator on chip, we demonstrate photon-pair generation at high rates of 8.5 MHz and 36.3 MHz using only 3.4-$μ$W and 13.4-$μ$W pump power, respectively, marking orders of magnitude improvement over the state-of-the-art. The measured coincidence to accidental ratio is well above 100 at those high rates and reaches $14,682\pm 4427$ at a lower pump power. The same chip enables heralded single-photon generation at tens of megahertz rates, each with low auto-correlation $g^{(2)}_{H}(0)=0.008$ and $0.097$ for the microwatt pumps. Such distinct performance, facilitated by the chip device's noiseless and giant optical nonlinearity, will contribute to the forthcoming pervasive adoption of quantum optical information technologies.
description: 5 pages, 3 figures
BrCris: Facilitando o Caminho para a Ciência Aberta através da Exportação de Conjuntos de Dados
Creators: name: Garcia de Souza, Marcel
name: Magela Rodrigues Dias, Thiago
name: Segundo, Washington
Publisher: name: Zenodo
Year: 2024

description: Apresentação realizada na sessão Comunicação II, da 15ª Conferência Lusófona de Ciência Aberta, na Escola Superior de Enfermagem do Porto (ESEP), de 01 a 04 de outubro de 2024.
Using the cluster mass function from weak lensing to constrain neutrino masses
Creators: name: Kristiansen, Jostein R.
name: Elgaroy, Oystein
name: Dahle, Hakon
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the variation of cosmological upper bounds on $M_ν$, the sum of the neutrino masses, with the choice of data sets included in the analysis, pointing out a few oddities not easily seen when all data sets are combined. For example, the effect of applying different priors varies significantly depending on whether we use the power spectrum from the 2dFGRS or SDSS galaxy survey. A conservative neutrino mass limit of $M_ν< 1.43$eV (95%C.L.) is obtained by combining the WMAP 3 year data with the cluster mass function measured by weak gravitational lensing. This limit has the virtue of not making any assumptions about the bias of luminous matter with respect to the dark matter, and is in this sense (and this sense only) bias-free.
description: 7 pages. References added. Some changes in discussion of results. Numerical results unchanged. Corresponds to version accepted for publication in PRD
Heated Poles on the Companion of Redback PSR J2339$-$0533
Creators: name: Kandel, D.
name: Romani, Roger W.
name: Filippenko, Alexei V.
name: Brink, Thomas G.
name: Zheng, WeiKang
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We analyze photometry and spectra of the "redback" millisecond pulsar binary J2339$-$0533. These observations include new measurements from Keck and GROND, as well as archival measurements from the OISTER, WIYN, SOAR, and HET telescopes. The parameters derived from GROND, our primary photometric data, describe well the rest of the datasets, raising our confidence in our fitted binary properties. Our fit requires hot-spots (likely magnetic poles) on the surface of the companion star, and we see evidence that these spots move over the 8 yr span of our photometry. The derived binary inclination $i = 69.3^\circ\pm 2.3^\circ$, together with the center-of-mass velocity (from the radial-velocity fits) $K_{\rm C} = 347.0\pm 3.7\,$ $\mathrm{km\,s}^{-1}$, give a fairly typical neutron star mass of $1.47\pm 0.09\,M_\odot$.
description: Accepted for publication in ApJ. 8 pages, 6 figures
Hamiltonian Dynamics of Thermostated Systems: Two-Temperature Heat-Conducting phi-4 Chains
Creators: name: Hoover, Wm G
name: Hoover, Carol G
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We consider and compare four Hamiltonian formulations of thermostated mechanics, three of them kinetic, and the other one configurational. Though all four approaches ``work'' at equilibrium, their application to many-body nonequilibrium simulations can fail to provide a proper flow of heat. All the Hamiltonian formulations considered here are applied to the same prototypical two-temperature "phi-4" model of a heat-conducting chain. This model incorporates nearest-neighbor Hooke's-Law interactions plus a quartic tethering potential. Physically correct results, obtained with the isokinetic Gaussian and Nose-Hoover thermostats, are compared with two other Hamiltonian results. The latter results, based on constrained Hamiltonian thermostats, fail correctly to model the flow of heat.
description: 15 pages, 6 figures, in honor of Prof Harald Posch Birthday #65
The middle-aged pulsar PSR J1741-2054 and its bow-shock nebula in far ultraviolet
Creators: name: Abramkin, Vadim
name: Pavlov, George G.
name: Shibanov, Yuriy
name: Posselt, B.
name: Kargaltsev, Oleg
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context. The nearby middle-aged gamma-ray pulsar J1741-2054 and its pulsar wind nebula (PWN) have been studied in X-rays, and its bow-shock nebula (BSN) has been investigated in the Balmer lines, but they have never been observed in far ultraviolet (FUV). Aims. To further study the thermal and magnetospheric emission from PSR J1741-2054 and the BSN properties, we observed them in the FUV range with the Hubble Space Telescope (HST). Methods. We imaged the target in two FUV filters of the HST's ACS/SBC detector. We also re-analyzed previous optical observations of the pulsar and its BSN. We fit the pulsar's FUV-optical spectrum separately and together with its X-ray spectrum. Results. We found that the pulsar's FUV-optical spectrum consists of a thermal and nonthermal components. A joint fit of the FUV-optical and X-ray spectra with combinations of a nonthermal and thermal components showed a hard optical nonthermal spectrum with a photon index $Γ_{opt} \approx 1.0-1.2$ and a softer X-ray component, $Γ_X \approx 2.6-2.7$. The thermal emission is dominated by the cold component with the temperature $kT_{cold}\approx 40-50$ eV and emitting sphere radius $R_{cold}\approx 8-15$ km, at $d=270$ pc. An additional hot thermal component, with $kT_{hot}\sim 80$ eV and $R_{hot}\sim 1$ km, is also possible. Such a spectrum resembles the spectra of other middle-aged pulsars, but it shows a harder (softer) optical (X-ray) nonthermal spectrum. We detected the FUV BSN, the first one associated with a middle-aged pulsar. Its closed-shell morphology is similar to the H$α$ BSN morphology, while its FUV flux, $\sim10^{-13}$ erg cm$^{-2}$ s$^{-1}$, is a factor of $\sim 4$ higher than the H$α$ flux. This FUV BSN has a higher surface brightness than the two previously known ones.
description: 16 pages, 9 figures, accepted for publication in Astronomy & Astrophysics
Interpretation of Recent SPS Dilepton Data
Creators: name: van Hees, Hendrik
name: Rapp, Ralf
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We summarize our current theoretical understanding of in-medium properties of the electromagnetic current correlator in view of recent dimuon data from the NA60 experiment in In(158 AGeV)-In collisions at the CERN-SPS. We discuss the sensitivity of the results to space-time evolution models for the hot and dense partonic and hadronic medium created in relativistic heavy-ion collisions and the contributions from different sources to the dilepton-excess spectra.
description: To appear in the proceedings of the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2006) v2: references added, minor typos corrected
Cytoskeleton influence on normal and tangent fluctuation modes in the red blood cells
Creators: name: Rochal, S. B.
name: Lorman, V. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We argue that the paradoxal softness of the red blood cells (RBC) in fluctuation spectra experiments is apparent. We show that the effective surface shear modulus $μ_s$ of the RBC obtained from fluctuation data and that measured in static deformation experiments have the same order of magnitude. A simple micromechanical model of the RBC developped for this purpose accounts for the influence of a finite-thickness cytoskeleton on the fluctuations of the composite membrane-cytoskeleton system. The spectrin network cytoskeleton with the bulk shear modulus estimated as $μ\approx105÷165$ Pa contributes to both normal and tangent fluctuations of the system and confines the fluctuations of the lipid membrane. The ratio of mean square amplitudes of the RBC normal and tangent fluctuations $ /< X_t^2>$ calculated in the frame of the model is 2-3 orders of magnitude smaller that it is in the free membrane with the same bending and shear moduli
description: 14 pages, 4 figures
When Services Computing Meets Blockchain: Challenges and Opportunities
Creators: name: Li, Xiaoyun
name: Zheng, Zibin
name: Dai, Hong-Ning
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences
subject: D.2.7; D.2.12; A.1

description: Services computing can offer a high-level abstraction to support diverse applications via encapsulating various computing infrastructures. Though services computing has greatly boosted the productivity of developers, it is faced with three main challenges: privacy and security risks, information silo, and pricing mechanisms and incentives. The recent advances of blockchain bring opportunities to address the challenges of services computing due to its build-in encryption as well as digital signature schemes, decentralization feature, and intrinsic incentive mechanisms. In this paper, we present a survey to investigate the integration of blockchain with services computing. The integration of blockchain with services computing mainly exhibits merits in two aspects: i) blockchain can potentially address key challenges of services computing and ii) services computing can also promote blockchain development. In particular, we categorize the current literature of services computing based on blockchain into five types: services creation, services discovery, services recommendation, services composition, and services arbitration. Moreover, we generalize Blockchain as a Service (BaaS) architecture and summarize the representative BaaS platforms. In addition, we also outline open issues of blockchain-based services computing and BaaS.
description: 15 pages, 5 figures
Purity and decoherence in the theory of a damped harmonic oscillator
Creators: name: Isar, A.
name: Sandulescu, A.
name: Scheid, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For the generalized master equations derived by Karrlein and Grabert for the microscopic model of a damped harmonic oscillator, the conditions for purity of states are written, in particular for different initial conditions and different types of damping, including Ohmic, Drude and weak coupling cases, Agarwal and Weidlich-Haake models. It is shown that the states which remain pure are the squeezed states with constant in time variances. For pure states, the generalized nonlinear Schr\" odinger-type equations corresponding to these master equations are also obtained. Then the condition for purity of states of a damped harmonic oscillator is considered in the framework of Lindblad theory for open quantum systems. For a special choice of the environment coefficients, the correlated coherent states with constant variances and covariance are shown to be the only states which remain pure all the time during the evolution of the considered system. In Karrlein-Grabert and Lindblad models, as well as in the considered particular models, the expressions of the rate of entropy production is written and it is shown that the states which preserve their purity in time are also the states which minimize the entropy production and, therefore, they are the most stable ones under evolution in the presence of the environment and play an important role in the description of decoherence phenomenon.
description: 24 pages
Ο χώρος στη δραματουργία (μέσα από μια ανάγνωση έργων των θεατρικών συγγραφέων Ίψεν, Στρίντμπεργκ, Μπέκετ, Πίντερ, Μύλλερ, Κολτές, Πομμερά):
Creators: name: Παυλοπούλου, Δέσποινα Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Χώρος
Δραματουργία
Ανάγνωση
Space
Dramaturgy
Reading

description: Μέσα στα θεατρικά κείμενα και καθώς εξελίσσεται η δραματουργία από τον Ίψεν έως πολύ σύγχρονους θεατρικούς συγγραφείς, μοιάζει να υπάρχουν διαφορετικοί χειρισμοί του χώρου, που ίσως ξεπερνούν την ιδιοτυπία του κάθε συγγραφέα και διατυπώνουν νέες χωρικές αντιλήψεις. Ο χώρος μοιάζει να γίνεται όλο και πιο σημαντικό δραματουργικό εργαλείο. Από φόντο της πλοκής, αποκτά με τον καιρό δομικό ρόλο με πολλαπλές λειτουργίες. Και ακριβώς επειδή ο χώρος στο κάθε κείμενο είναι συστατικό ολόκληρου του θεατρικού κόσμου που πλάθει ο συγγραφέας, τίθεται ένα ζήτημα παράλληλης λειτουργίας χώρου και δραματουργίας. Υπάρχει άραγε μια εξελικτική τάση του ρόλου και της αντίληψης του χώρου στα θεατρικά κείμενα που ακολουθεί αντίστοιχα την εξέλιξη της δραματουργίας; Αναζητώ πιθανές απαντήσεις στο ερώτημα αυτό επιλέγοντας έργα θεατρικών συγγραφέων που εισάγουν νέες προσεγγίσεις στη δραματουργία και συγκρίνοντας κατόπιν το χειρισμό και τη δραματική λειτουργία του χώρου σε αυτά. Ξεκινώντας από τον Ίψεν και τον Στρίνμπεργκ, μελετώ αντιπροσωπευτικά για το θέμα μου έργα του Μπέκετ, του Πίντερ, του Χάινερ Μύλερ, του Κολτές και του Πομμερά, συγγραφέων που διαγράφουν μια χρονική διαδρομή που εκτείνεται περίπου μέσα στον 20ό αιώνα. Ποιες είναι οι διαφορές που εντοπίζονται; Και πώς αυτές μπορεί να σχετίζονται με τις εξελίξεις της δραματουργίας;Αυτή η ανάγνωση της πολλαπλότητας των ποιοτήτων του χώρου είναι ένα υλικό που εμπεριέχει τη ρευστότητα και τη δυναμική του ακόμα ασχημάτιστου χώρου των προς πραγματοποίηση εκδοχών του θεατρικού κειμένου. Τέτοιες αφηρημένες δυναμικές είναι ερεθίσματα της φαντασίας για έναν σκηνογράφο.
description: As dramaturgy evolves from Ibsen to contemporary playwrights, different approaches to handling space emerge in theatrical texts. These appear to go beyond each author’s particularity and to recast new ideas about the role of space. Progressively, space becomes an increasingly important tool for playwrights. From being a background for the plot, in the course of time space acquires a structural role in the play, carrying a variety of meanings. Since it contains the theatrical world created by the writer, the question of parallel function of space and dramaturgy emerges. Is there indeed an evolution in the role and use of space in the texts that follows changes of dramaturgy? I am attempting to answer this question by comparing the use and the dramatic role of space in selected plays written by playwrights who introduce new aspects in dramaturgy. I focus on plays written during 20th century by Ibsen, Strindberg, Beckett, Heiner Müller, Koltès and Joël Pommerat. What are the differences observed? And how are they related to the evolution of dramaturgy? The reading of abstract qualities of space in these texts thus provides set designers with a raw material that is fluid and full of representation potentials.
Stable and unstable trajectories in a dipolar chain
Creators: name: Cisternas, Jaime
name: Mellado, Paula
name: Urbina, Felipe
name: Portilla, Cristóbal
name: Carrasco, Miguel
name: Concha, Andrés
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chaotic Dynamics (nlin.CD)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In classical mechanics, solutions can be classified according to their stability. Each of them is part of the possible trajectories of the system. However, the signatures of unstable solutions are hard to observe in an experiment, and most of the times if the experimental realization is adiabatic, they are considered just a nuisance. Here we use a small number of XY magnetic dipoles subject to an external magnetic field for studying the origin of their collective magnetic response. Using bifurcation theory we have found all the possible solutions being stable or unstable, and explored how those solutions are naturally connected by points where the symmetries of the system are lost or restored. Unstable solutions that reveal the symmetries of the system are found to be the culprit that shape hysteresis loops in this system. The complexity of the solutions for the nonlinear dynamics is analyzed using the concept of boundary basin entropy, finding that the damping time scale is critical for the emergence of fractal structures in the basins of attraction. Furthermore, we numerically found domain wall solutions that are the smallest possible realizations of transverse walls and vortex walls in magnetism. We experimentally confirmed their existence and stability showing that our system is a suitable platform to study domain wall dynamics at the macroscale.
description: 13 pages, 8 figures
Betelgeuse scope: Single-mode-fibers-assisted optical interferometer design for dedicated stellar activity monitoring
Creators: name: Anugu, Narsireddy
name: Morzinski, Katie M.
name: Eisner, Josh
name: Douglas, Ewan
name: Marrone, Dan
name: Ertel, Steve
name: Haffert, Sebastiaan
name: Montoya, Oscar
name: Stone, Jordan
name: Kraus, Stefan
name: Monnier, John
name: Lebouquin, Jean-Baptiste
name: Berger, Jean-Philippe
name: Woillez, Julien
name: Montargès, Miguel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Betelgeuse has gone through a sudden shift in its brightness and dimmed mysteriously. This is likely caused by a hot blob of plasma ejected from Betelgeuse and then cooled to obscuring dust. If true, it is a remarkable opportunity to directly witness the formation of dust around a red supergiant star. Today's optical telescope facilities are not optimized for time-evolution monitoring of the Betelgeuse surface, so in this work, we propose a low-cost optical interferometer. The facility will consist of $12 \times 4$ inch optical telescopes mounted on the surface of a large radio dish for interferometric imaging; polarization-maintaining single-mode fibers will carry the coherent beams from the individual optical telescopes to an all-in-one beam combiner. A fast steering mirror assisted fiber injection system guides the flux into fibers. A metrology system senses vibration-induced piston errors in optical fibers, and these errors are corrected using fast-steering delay lines. We will present the design.
description: Presented at SPIE Optics+Photonics conference, 9 pages, 3 figures
Outflows in the presence of cosmic rays and waves
Creators: name: Ramzan, B.
name: Ko, C. M.
name: Chernyshov, D. O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Plasma outflow or wind against a gravitational potential under the influence of cosmic rays is studied in the context of hydrodynamics. Cosmic rays interact with the plasma via hydromagnetic fluctuations. In the process, cosmic rays advect and diffuse through the plasma. We adopt a multi-fluid model in which besides thermal plasma, cosmic rays and self-excited Alfven waves are also treated as fluids. We seek possible physically allowable steady state solutions of three-fluid (one Alfven wave) and four-fluid (two Alfven waves) models with given the boundary conditions at the base of the potential well. Generally speaking, there are two classes of outflows, subsonic and supersonic (with respect to a suitably defined sound speed). Three-fluid model without cosmic ray diffusion can be studied in the same way as the classic stellar wind problem, and is taken as a reference model. When cosmic ray diffusion is included, there are two categories of solutions. One of them resembles the three-fluid model without diffusion, and the other behaves like thermal wind at large distances when the waves wither and cosmic rays are decoupled from the plasma. We also inspect the effect of wave damping mechanisms (such as, nonlinear Landau damping). Roughly speaking, the effect is much smaller in supersonic outflow than in subsonic outflow.
description: 16 pages, 9 figures, 1 table; Accepted for publication in the Astrophysical Journal
Controlling the quantum computational speed
Creators: name: Metwally, N.
name: Abdel-Aty, M.
name: Abdalla, M. Sebawe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The speed of quantum computation is investigated through the time evolution of the speed of the orthogonality. The external field components for classical treatment beside the detuning and the coupling parameters for quantum treatment play important roles on the computational speed. It has been shown that the number of photons has no significant effect on the speed of computation. However, it is very sensitive to the variation in both detuning and the interaction coupling parameters.
description: 9 pages, 10 figures
ERICC Policy Brief _ Creating Credible Education Data Spaces in Northwest Syria
Creators: name: ERICC Consortium
name: Nasser, Rabie
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390201
subject: Education policy

description: Drawing on a detailed review of data systems in NW Syria (DSNWS) conducted by the ERICC research team, this policy brief highlights the key challenges around data systems in Northwest Syria (NW Syria) and makes policy recommendations to education stakeholders in the region:● Establish independent spaces for producing and disseminating education data which will:
 - be owned by local institutions with inclusive governance systems, functioning aspublic institutions independent of current political governments
 - build on successful initiatives, promoting further cooperation among interestedactors to expand capacities and reduce conflict-related risks.Strengthen the capacity of the Assistance Coordination Unit (ACU) as a comprehensiveand high-quality data system that could be a core institution in the proposed space.Apply participatory approaches to increase credibility and trust in the data produced,making it publicly available without compromising privacy.Adopt transdisciplinary approaches to produce multi-themed data, crucial forunderstanding complex conflict-related phenomena and educational processes.Adhere to high research ethics, which is essential at all stages of data production and use.Produce comprehensive data covering all of Syria or modify existing data to createcomparable databases to bridge gaps across conflict lines.Ensure consistency with international data standards and partnerships with globaltechnical bodies.Utilise new technologies to enhance quality and security.Diversify funding sources, as a crucial factor for sustainability, to:
shift from humanitarian to development strategies, create solidarity economy initiatives, develop crowdfunding platforms, and encourage volunteerism.
Μιχαήλ Μητσάκης, η ετερότητα μέσα από δύο «μυωπικά μάτια»:
Creators: name: Μαρκοπούλου, Μαρία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Μιχαήλ Μητσάκης
Ετερότητα
Περιθωριακές μορφές
Michael Mitsakis
The concept of the "other"
Marginal figures

description: Αντικείμενο της συγκεκριμένης μεταπτυχιακής εργασίας είναι ο καθορισμός του όρου «ετερότητα» στο έργο του Μιχαήλ Μητσάκη. Αρχικά προσπαθώ να δώσω ένα ιστορικό πλαίσιο για την εποχή και την ανάπτυξη της αστικής πεζογραφίας του 19ου αιώνα. Στη συνέχεια περιγράφονται οι μορφές του «άλλου», του «διαφορετικού» μέσα στα κείμενα του Μητσάκη. Στόχος μου είναι να περιγράψω ποια στοιχεία θεωρεί ο ίδιος ετερόκλητα και πώς ο όρος αυτός αποκτά περιεχόμενο στα έργα του με βάση τις πολιτικές και κοινωνικές του πεποιθήσεις. Με την περιφερειακή ματιά του, ο Μητσάκης καταφέρνει να εντοπίσει το παραγκωνισμένο, το ξεχασμένο και να το φέρει στο προσκήνιο, δίνοντάς του αξία. Τα όρια της ματιάς διευρύνονται και ο αφηγητής θέλει να αποκαλύψει την κρυμμένη κάτω από την επιφάνεια πραγματικότητα. Οι «περιθωριακές» αυτές μορφές μπορεί να είναι άνθρωποι ξεχασμένοι άλλων καιρών, του ηρωικού παρελθόντος, μορφές κοριτσιών με μια αγνή, πρωτόγνωρη ομορφιά και χάρη, ιδανική για την εποχή αυτήν της στρεβλής κοινωνικής πραγματικότητας.
description: The aim of the present postgraduate thesis is the definition of the term “other” in Michael Mitsakis’ literary work. In the first place I intent to describe the historic conditions about the era and the development of the urban literature in 19th century. Following, are described the figures of the “other”, of the “different” in the author’s texts. My aim is to define which elements are considered by the author as incongruous and how this term acquires content in his works based on his political and social beliefs. Through his eyes of regional, Mitsakis manages to locate the sidelined, the forgotten and bring it to the fore, giving it value. The limits of sight are expanded and the narrator wants to uncover the hidden beneath the surface reality. These marginal figures can be people of other times, of the heroic past, figures of girls with a pure, unprecedented beauty and grace, perfect for this time of distorted social reality.
System Design for a Data-driven and Explainable Customer Sentiment Monitor
Creators: name: Nguyen, An
name: Foerstel, Stefan
name: Kittler, Thomas
name: Kurzyukov, Andrey
name: Schwinn, Leo
name: Zanca, Dario
name: Hipp, Tobias
name: Sun, Da Jun
name: Schrapp, Michael
name: Rothgang, Eva
name: Eskofier, Bjoern
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The most important goal of customer services is to keep the customer satisfied. However, service resources are always limited and must be prioritized. Therefore, it is important to identify customers who potentially become unsatisfied and might lead to escalations. Today this prioritization of customers is often done manually. Data science on IoT data (esp. log data) for machine health monitoring, as well as analytics on enterprise data for customer relationship management (CRM) have mainly been researched and applied independently. In this paper, we present a framework for a data-driven decision support system which combines IoT and enterprise data to model customer sentiment. Such decision support systems can help to prioritize customers and service resources to effectively troubleshoot problems or even avoid them. The framework is applied in a real-world case study with a major medical device manufacturer. This includes a fully automated and interpretable machine learning pipeline designed to meet the requirements defined with domain experts and end users. The overall framework is currently deployed, learns and evaluates predictive models from terabytes of IoT and enterprise data to actively monitor the customer sentiment for a fleet of thousands of high-end medical devices. Furthermore, we provide an anonymized industrial benchmark dataset for the research community.
Colonizing women’s minds: feminism, therapy and the FMS backlash
Creators: name: Cox, Robin S.
Publisher: name: University of British Columbia
Year: 2009

description: During the last three to four decades, the feminism movement has moved from its radical roots towards an increasingly liberalized stance. Nowhere is this more evident than in its relationship with psychology. In 1978, Mary Daly described therapy as "mind rape", a patriarchal institution of social control whose aim was to reconcile women (and other oppressed groups) to their oppression. Since that time, the feminist movement has moved toward an increasingly entrenched relationship with/in therapy and psychology. Feminist therapy lies at this intersection of feminism and psychology offering women (and men) a reformed vision of mental health and therapeutic practice framed through a feminist political analysis. The question remains, however, whether or not psychology/therapy can ever be compatible with feminist and with the feminist goal of ending women's violent oppression. In order to explore this question I critically examine feminist therapy in the context of violence against women and the context of false memory syndrome discourse. FMS discourse provides a specific context within which to explore the ways in which therapy and the embracing of a therapeutic culture within the feminist movement have contributed to, or at least facilitated the current backlash against feminism and the feminist goal of ending violence against women. Using a critical, deconstructive approach I examine the therapeutic language and themes of FMS discourse and the ways in which the anti-feminist agenda within the discourse relates to, and is supported by feminism's engagement with therapy/psychology. This text also documents the sometimes overwhelming contradictions in my own journey as a radicalized feminist in a graduate program in Counselling Psychology. It arises not only from the (re)examination of my relationship with psychology and therapy, but also from my struggle to work creatively and politically within a rigid, and unself-reflexive academic context. By juxtaposing alternate readings/writings of the FMS data I attempt to display not only the complexity of the issues arising from feminism's relationship with psychology/therapy, but also to capture, in some measure, the evocative and provocative potential of stepping outside the traditional research text.
Νέα μέσα και κοινωνικά δίκτυα. Οι ιστοσελίδες κοινωνικής δικτύωσης ως κοινωνικά μέσα: Οι αντιλήψεις των χρηστών των ιστοτόπων κοινωνικής δικτύωσης για το κοινωνικό τους κεφάλαιο
Creators: name: Μπαρμποπούλου, Βενετία Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Κοινωνικό κεφάλαιο
Ιστότοποι κοινωνικής δικτύωσης
Κοινωνικά δίκτυα και κοινωνικά μέσα
Social capital
Social network sites
Social networks and social media

description: Η διπλωματική αυτή εργασία εξετάζει το ρόλο των κοινωνικών μέσων και, συγκεκριμένα, των ιστοτόπων κοινωνικής δικτύωσης στην κοινωνικότητα των χρηστών τους. Η έρευνα πραγματοποιήθηκε με τη χρήση της μεθόδου των ομάδων εστίασης με σκοπό την μελέτη των αντιλήψεων διαφόρων κατηγοριών χρηστών του Facebook στην Ελλάδα σχετικά με το επιγραμμικό κοινωνικό τους κεφάλαιο. Η ανάλυση έδειξε ότι η δυνατότητα διατήρησης και διαχείρισης μεγάλου αριθμού αδύναμων δεσμών στους καταλόγους των «φίλων», αποτελεί έναν σοβαρό λόγο προσέλκυσης χρηστών στο Facebook. Δεν παρατηρήθηκε ιδιαίτερη επίδραση της χρήσης του στους ισχυρούς δεσμούς. Η έννοια των δυνητικών δεσμών και η διατήρησή τους στις λίστες των «φίλων» υπογραμμίζεται ιδιαιτέρως ως σημαντικό στοιχείο της διαδικασίας πρόσκτησης και διατήρησης κοινωνικού κεφαλαίου γεφύρωσης.
description: This master thesis examines the role that social media and, especially, Social Network Sites play into the sociality of their users. Research was contacted through focus groups in order to acquire a view of the perceptions of various categories of users of Facebook in Greece regarding their online social capital. Analysis showed that it is mainly the capability of keeping and handling large amounts of weak ties into their friendship lists, one serious reason attracting users to Facebook. No significant effect was found regarding their strong ties through its use. The notion of latent ties and the importance of keeping these into their lists is particularly stressed here as a significant part of the procedure of acquiring and maintaining bridging social capital.
Excitation of solar-like oscillations across the HR diagram
Creators: name: Samadi, R.
name: Georgobiani, D.
name: R., R. Trampedach
name: Goupil, M. -J.
name: Stein, R. F.
name: Nordlund, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We extend semi-analytical computations of excitation rates for solar oscillation modes to those of other solar-like oscillating stars to compare them with recent observations. Numerical 3D simulations of surface convective zones of several solar-type oscillating stars are used to characterize the turbulent spectra as well as to constrain the convective velocities and turbulent entropy fluctuations in the uppermost part of the convective zone of such stars. These constraints, coupled with a theoretical model for stochastic excitation, provide the rate 'P' at which energy is injected into the p-modes by turbulent convection. These energy rates are compared with those derived directly from the 3D simulations. The excitation rates obtained from the 3D simulations are systematically lower than those computed from the semi-analytical excitation model. We find that Pmax, the excitation rate maximum, scales as (L/M)^s where s is the slope of the power law and L and M are the mass and luminosity of the 1D stellar model built consistently with the associated 3D simulation. The slope is found to depend significantly on the adopted form of the eddy time-correlation ; using a Lorentzian form results in s=2.6, whereas a Gaussian one gives s=3.1. Finally, values of Vmax, the maximum in the mode velocity, are estimated from the computed power laws for Pmax and we find that Vmax increases as (L/M)^sv. Comparisons with the currently available ground-based observations show that the computations assuming a Lorentzian eddy time-correlation yield a slope, sv, closer to the observed one than the slope obtained when assuming a Gaussian. We show that the spatial resolution of the 3D simulations must be high enough to obtain accurate computed energy rates.
description: 14 pages ; 7 figures ; accepted for publication in Astrophysics & Astronomy