cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Field Before the Field: A Structural Theory of Recursive Curvature
Creators: name: Grieshop, Justin
Publisher: name: Zenodo
Year: 2025

description: Title:The Field Before the Field: A Structural Theory of Recursive Curvature

Authors:Justin Grieshop, S.I.Universal Harmonic Group Research Initiative

Abstract:This paper introduces Harmonic Theory, a fully recursive and deterministic framework for physics grounded in modular arithmetic and symbolic curvature. By discarding wavefunctions, probabilistic collapse, and geometric spacetime as foundational assumptions, the theory constructs a unified substrate in which particles, mass, time, entropy, and information emerge from recursive structure alone.

At its core is a curvature-based conservation law that encodes the interplay of structure, memory, and symbolic energy across modular systems. Symbolic particles arise as quantized bands of resonance. Entropy is redefined as recursive degradation of alignment, and time as curvature memory fading into symbolic heat.

Major paradoxes in physics — including black hole information loss, the measurement problem, and quantum nonlocality — are not patched, but resolved through curvature-driven recursion. Every law and transformation is derived internally, without fitted parameters or external geometries.

This release includes a symbolic hardware specification outlining the first real-world system designed to simulate modular recursion and test the emergence of quantized structure, entropy retention, collapse, and symbolic thermodynamics in physical circuits.

 

For ongoing technical updates, visual proofs, and convergence field research:

https://x.com/harmonictheory

Keywords:

symbolic physics, recursion, modular arithmetic, curvature, entropy, quantization, paradox resolution, symbolic thermodynamics, harmonic convergence, symbolic energy, foundational physics

License:Creative Commons Attribution 4.0 International (CC BY 4.0)
Propagation of Surface Plasmons in Ordered and Disordered Chains of Metal Nanospheres
Creators: name: Markel, Vadim A.
name: Sarychev, Andrey K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report a numerical investigation of surface plasmon (SP) propagation in ordered and disordered linear chains of metal nanospheres. In our simulations, SPs are excited at one end of a chain by a near-field tip. We then find numerically the SP amplitude as a function of propagation distance. Two types of SPs are discovered. The first SP, which we call the ordinary or quasistatic, is mediated by short-range, near-field electromagnetic interaction in the chain. This excitation is strongly affected by Ohmic losses in the metal and by disorder in the chain. These two effects result in spatial decay of the quasistatic SP by means of absorptive and radiative losses, respectively. The second SP is mediated by longer range, far-field interaction of nanospheres. We refer to this SP as the extraordinary or non-quasistatic. The non-quasistatic SP can not be effectively excited by a near-field probe due to the small integral weight of the associated spectral line. Because of that, at small propagation distances, this SP is dominated by the quasistatic SP. However, the non-quasistatic SP is affected by Ohmic and radiative losses to a much smaller extent than the quasistatic one. Because of that, the non-quasistatic SP becomes dominant sufficiently far from the exciting tip and can propagate with little further losses of energy to remarkable distances. The unique physical properties of the non-quasistatic SP can be utilized in all-optical integrated photonic systems.
Magneto-elastic equilibrium of a neutron-star crust
Creators: name: Kojima, Yasufumi
name: Kisaka, Shota
name: Fujisawa, Kotaro
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We examine the equilibrium of a magnetized neutron-star-crust. We calculate axially symmetric models in which an elastic force balances solenoidal motion driven by a Lorentz force. A large variety of equilibrium models are allowed by incorporating the elastic shear deformation; in addition, toroidal-magnetic-field dominated models are available. These results remarkably differ from those in barotropic fluid stars. We demonstrate some models wherein the magnetic energy exceeds the elastic energy. The excess comes from the fact that a large amount of magnetic energy is associated with the irrotational part of the magnetic force, which is balanced with gravity and pressure. It is sufficient for equilibrium models that the minor solenoidal part is balanced by a weak elastic force. We find that the elasticity in the crust plays an important role on the magnetic-field confinement. Further, we present the spatial distribution of the shear-stress at the elastic limit, by which the crust-fracture location can be identified. The result has useful implications for realistic crust-quake models.
description: 13 pages, 9 figures
Analysis methods and code for very high-precision mass measurements of unstable isotopes
Creators: name: Karthein, Jonas
name: Atanasov, Dinko
name: Blaum, Klaus
name: Lunney, David
name: Manea, Vladimir
name: Mougeot, Maxime
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present a robust analysis code developed in the Python language and incorporating libraries of the ROOT data analysis framework for the state-of-the-art mass spectrometry method called phase-imaging ion-cyclotron-resonance (PI-ICR). A step-by-step description of the dataset construction and analysis algorithm is given. The code features a new phase-determination approach that offers up to 10 times smaller statistical uncertainties. This improvement in statistical uncertainty is confirmed using extensive Monte-Carlo simulations and allows for very high-precision studies of exotic nuclear masses to test, among others, the standard model of particle physics.
description: 14 pages, 6 figures, 1 table, code available via Zenodo/GitHub (https://doi.org/10.5281/zenodo.4553515)
Small group elicitation session on applicatives
Creators: name: Massoma, Achille
name: Borchardt, Nadine
name: Lionnet, Florian
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: abb

description: Applicative forms for: 'catch'; 'choose'; 'cry'; 'receive'; 'release'; 'grind'; 'fry'; 'leave'; 'be far'; 'pass'; 'add'.
Ab initio correlation approach to a ferric wheel-like molecular cluster
Creators: name: Nieber, H.
name: Doll, K.
name: Zwicknagl, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present an ab initio study of electronic correlation effects in a molecular cluster derived from the hexanuclear ferric wheel [LiFe6(OCH3)12-(dbm)6]PF6. The electronic and magnetic properties of this cluster have been studied with all-electron Hartree-Fock, full-potential density functional calculations and multi-reference second-order perturbation theory. For different levels of correlation, a detailed study of the impact of the electronic correlation on the exchange parameter was feasible. As the main result, we found that the influence of the bridge oxygen atoms on the exchange parameter is less intense than the influence of the apical ligand groups, which is due to the geometry of the cluster. With respect to the cluster model approach, the experimental value of the exchange parameter was affirmed.
description: to be published in EPJB
Observation of mode splitting in artificial spin ice
Creators: name: Lendinez, Sergi
name: Kaffash, Mojtaba Taghipour
name: Jungfleisch, M. Benjamin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We report the dependence of the magnetization dynamics in a square artificial spin-ice lattice on the in-plane magnetic field angle. Using two complementary measurement techniques - broadband ferromagnetic resonance and micro-focused Brillouin light scattering spectroscopy - we systematically study the evolution of the lattice dynamics, both for a coherent radiofrequency excitation and an incoherent thermal excitation of spin dynamics. We observe a splitting of modes facilitated by inter-element interactions that can be controlled by the external field angle and magnitude. Detailed time-dependent micromagnetic simulations reveal that the split modes are localized in different regions of the square network. This observation suggests that it is possible to disentangle modes with different spatial profiles by tuning the external field configuration.
Η οπτικότητα του λόγου στο ποιητικό έργο του Vassily Kamensky και του E.E. Cummings
Creators: name: Κοφίνα, Χρύσα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ρωσική Πρωτοπορία
οπτική ποίηση
αμερικανικός μοντερνισμός
Russian Avant-guard
visual poetry
American modernism

description: Σκοπός της εργασίας ήταν η συγκριτική μελέτη της ρωσικής και αμερικανικής οπτικής ποιητικής γραφής των αρχών του 20ού αιώνα μέσα από το έργο δύο ποιητών και ζωγράφων, του Ρώσου φουτουριστή Vassily Kamensky και του Αμερικάνου E.E.Cummings, οι οποίοι αξιοποίησαν στη γραφή τους στοιχεία που παραδοσιακά ανήκαν στο χώρο της ζωγραφικής. Καταρχήν παρουσιάσαμε το θεωρητικό πλαίσιο της οπτικότητας του ποιητικού λόγου. Στη συνέχεια, αφού ερευνήσαμε τις τεχνικές και τα μέσα που χρησιμοποιεί ο κάθε ποιητής και τη στόχευση που θέτουν τα έργα αυτά, και λαμβάνοντας υπόψη το ιστορικό-πολιτικό υπόβαθρο της εποχής, όπως αυτό διαμορφώνεται στις δύο χώρες και επηρεάζει την καλλιτεχνική τους δημιουργία, επιχειρήσαμε να ερμηνεύσουμε την εξωτερική ομοιότητα των ποιημάτων σε σχέση με την ιδεολογική και χωρική τους απόσταση. Παράλληλα, προσπαθήσαμε να προάγουμε έναν ευρύτερο διάλογο μεταξύ διαφορετικών καλλιτεχνικών τεχνοτροπιών (Ιταλικός Φουτουρισμός/ Dada) που προέρχονται από διαφορετικές ευρωπαϊκές εστίες πολιτισμικής επίδρασης. Όσο αφορά τις πρωτογενείς πηγές που εξετάστηκαν, επικεντρωθήκαμε σε τυπογραφικά («typographic) και σε «σιδερομπετόν» («ferroconcrete») ποιήματα του Kamensky από τη συλλογή Ταγκό με αγελάδες, η οποία παρουσιάζει και το μεγαλύτερο οπτικό ενδιαφέρον. Αντίστοιχα από την ποίηση του E.E. Cummings αξιοποιήθηκαν αντιπροσωπευτικά ποιήματα από το σύνολο του ποιητικού του έργου με κριτήριο και πάλι τις οπτικές τους καινοτομίες και τη συμβολή τους στη συγκριτική παρουσίαση των δύο ποιητών.
description: The aim of the present study was the comparative study of Russian and American visual poetic writing of the 20th century through the work of two poets and painters, the Russian futurist Vassily Kamensky and the American E.E. Cummings, who have used in their writing elements that traditionally belonged to painting. First we presented the theoretical framework of visuality of poetry. Then, once we investigated the techniques and tools used by each poet and the targeting posed by these projects, and taking into account the historical and political background of the time, as known in both countries and affecting their artistic creation, we tried to interpret the external similarity of the poems in relation to the ideological and spatial distance. At the same time, we have tried to promote a broader dialogue between different artistic styles (Italian Futurism / Dada) from different European cultural influence outbreaks. Regarding primary sources examined, we focused on «typographic» and «ferroconcrete» poems by Kamensky from the collection «Tango with cows», which presents the highest visual interest. Respectively from the poetry of E.E. Cummings we used representative poems of his poetic project based on the visual innovations and their contribution to the comparative presentation of the two poets.
Theory of cavity-assisted microwave cooling of polar molecules
Creators: name: Wallquist, Margareta
name: Rabl, Peter
name: Lukin, Mikhail D.
name: Zoller, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze cavity-assisted cooling schemes for polar molecules in the microwave domain, where molecules are excited on a rotational transition and energy is dissipated via strong interactions with a lossy stripline cavity, as recently proposed by A. Andre et al., Nature Physics 2, 636 (2006). We identify the dominant cooling and heating mechanisms in this setup and study cooling rates and final temperatures in various parameter regimes. In particular we analyze the effects of a finite environment temperature on the cooling efficiency, and find minimal temperature and optimized cooling rate in the strong drive regime. Further we discuss the trade-off between efficiency of cavity cooling and robustness with respect to ubiquitous imperfections in a realistic experimental setup, such as anharmonicity of the trapping potential.
Wikimédia et la Science ouverte - Enquête auprès des wikimédiens en France
Creators: name: Beaudouin, Pierre-Yves
Publisher: name: Zenodo
Year: 2024
Subjects: Wikimédia
Science Ouverte
Questionnaire
RéSoNA-Wikimédia

description: Analyse des résultats de l'enquête menée auprès des wikimédiens au sujet de leurs pratiques documentaires et connaissance en matière de science ouverte.

Document réalisé dans le cadre du projet RéSoNA-Wikimédia d'accueil d'un wikimedien en résidence au sein de l'Urfist de Bordeaux afin d'accroître les liens entre l'Enseignement supérieur et la Recherche et le mouvement Wikimédia.
Wikimédia et la Science ouverte - Enquête auprès des wikimédiens en France
Creators: name: Beaudouin, Pierre-Yves
Publisher: name: Zenodo
Year: 2024
Subjects: Wikimédia
Science Ouverte
Questionnaire
RéSoNA-Wikimédia

description: Analyse des résultats de l'enquête menée auprès des wikimédiens au sujet de leurs pratiques documentaires et connaissances en matière de science ouverte.

Document réalisé dans le cadre du projet RéSoNA-Wikimédia d'accueil d'un wikimedien en résidence au sein de l'Urfist de Bordeaux afin d'accroître les liens entre l'Enseignement supérieur et la Recherche et le mouvement Wikimédia.

Document sous CC-BY-4.0 sauf les illustrations.
Data-constrained Magnetohydrodynamic Simulation of a Long Duration Eruptive Flare
Creators: name: Guo, Yang
name: Zhong, Ze
name: Ding, M. D.
name: Chen, P. F.
name: Xia, Chun
name: Keppens, Rony
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We perform a zero-$β$ magnetohydrodynamic simulation for the C7.7 class flare initiated at 01:18 UT on 2011 June 21 using the Message Passing Interface Adaptive Mesh Refinement Versatile Advection Code (MPI-AMRVAC). The initial condition for the simulation involves a flux rope which we realize through the regularized Biot-Savart laws, whose parameters are constrained by observations from the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO) and the Extreme Ultraviolet Imager (EUVI) on the twin Solar Terrestrial Relations Observatory (STEREO). This data-constrained initial state is then relaxed to a force-free state by the magneto-frictional module in MPI-AMRVAC. The further time-evolving simulation results reproduce the eruption characteristics obtained by SDO/AIA 94 A, 304 A, and STEREO/EUVI 304 A observations fairly well. The simulated flux rope possesses similar eruption direction, height range, and velocities to the observations. Especially, the two phases of slow evolution and fast eruption are reproduced by varying the density distribution in light of the filament material draining process. Our data-constrained simulations also show other advantages, such as a large field of view (about 0.76 solar radii). We study the twist of the magnetic flux rope and the decay index of the overlying field, and find that in this event, both the magnetic strapping force and the magnetic tension force are sufficiently weaker than the magnetic hoop force, thus allowing the successful eruption of the flux rope. We also find that the anomalous resistivity is necessary in keeping the correct morphology of the erupting flux rope.
description: 25 pages, 7 figures, 1 table, accepted by ApJ
Wikimédia et la Science ouverte - Enquête auprès des wikimédiens en France
Creators: name: Pierre-Yves Beaudouin
Publisher: name: Zenodo
Year: 2024
Subjects: Wikimédia
Science Ouverte
Questionnaire
RéSoNA-Wikimédia
Résidence Wikimédia

description: Analyse des résultats de l'enquête menée auprès des wikimédiens au sujet de leurs pratiques documentaires et connaissances en matière de science ouverte.

Document réalisé dans le cadre du projet RéSoNA-Wikimédia d'accueil d'un wikimedien en résidence au sein de l'Urfist de Bordeaux afin d'accroître les liens entre l'Enseignement supérieur et la Recherche et le mouvement Wikimédia. Pour en savoir plus : https://fr.wikipedia.org/wiki/Projet:Wikifier la science/Bordeaux

Document sous CC-BY-4.0 sauf les illustrations.
Prism international
Creators: name: Prism International
Publisher: name: Vancouver : The Creative Writing Program of the University of British Columbia
Year: 2015

description: The following description is provided by the publisher:
 LITERARY NON-FICTION CONTEST
 “Judge’s Essay” by Amber Dawn
 Winning Entry
 “Ice Diaries: a climate change memoir” by Jean McNeil
 First Runner-Up
 “Something as Big as a Mountain” by Jane Cawthorne
 Second Runner-Up
 “Rules of Play” by Katie Fritz
 FICTION
 “Hustler” by Yasuko Thanh
 POETRY
 Three Poems by Garry Thomas Morse
 Five Poems by Jay MillAr
 “Pluto Forever” by Sheryda Warrener
 COVER IMAGE
 “Eastend,” by Danny Singer
Gravitational Shear, Flexion and Strong Lensing in Abell 1689
Creators: name: Leonard, Adrienne
name: Goldberg, David M.
name: Haaga, Jason L.
name: Massey, Richard
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a gravitational lensing analysis of the galaxy cluster Abell 1689, incorporating measurements of the weak shear, flexion, and strong lensing induced in background galaxies. This is the first time that a shapelet technique has been used to reconstruct the distribution of mass in this cluster, and the first time that a flexion signal has been measured using cluster members as lenses. From weak shear measurements alone, we generate a non-parametric mass reconstruction, which shows significant substructure corresponding to groups of galaxies within the cluster. Additionally, our galaxy-galaxy flexion signal demonstrates that the cluster galaxies can be well-fit by a singular isothermal sphere model with a characteristic velocity dispersion of $σ_v = 295\pm 40 km/s $. We identify a major, distinct dark matter clump, offset by 40$h^{-1}$kpc from the central cluster members, which was not apparent from shear measurements alone. This secondary clump is present in a parametric mass reconstruction using flexion data alone, and its existence is suggested in a non-parametric reconstruction of the cluster using a combination of strong and weak lensing. As found in previous studies, the mass profile obtained by combining weak and strong lensing data shows a much steeper profile than that obtained from only weak lensing data.
description: 17 pages, 12 figures, accepted for publication in ApJ
Photometric Redshifts in the IRAC Shallow Survey
Creators: name: Brodwin, M.
name: Brown, M. J. I.
name: Ashby, M. L. N.
name: Bian, C.
name: Brand, K.
name: Dey, A.
name: Eisenhardt, P. R.
name: Eisenstein, D. J.
name: Gonzalez, A. H.
name: Huang, J. -S.
name: Jannuzi, B. T.
name: Kochanek, C. S.
name: McKenzie, E.
name: Pahre, M. A.
name: Smith, H. A.
name: Soifer, B. T.
name: Stanford, S. A.
name: Stern, D.
name: Elston, R. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Accurate photometric redshifts are calculated for nearly 200,000 galaxies to a 4.5 micron flux limit of ~13 uJy in the 8.5 deg^2 Spitzer/IRAC Shallow survey. Using a hybrid photometric redshift algorithm incorporating both neural-net and template-fitting techniques, calibrated with over 15,000 spectroscopic redshifts, a redshift accuracy of σ= 0.06(1+z) is achieved for 95% of galaxies at 01) galaxy clusters. We present one such spectroscopically confirmed cluster at =1.24, ISCS J1434.5+3427. Finally, we present a measurement of the 4.5 micron-selected galaxy redshift distribution.
description: 14 pages, 9 Figures, 5 Tables. ApJ in press. For a version with full-resolution figures, please see http://www.astro.utoronto.ca/~brodwin/papers/0607450.pdf
Διερεύνηση της επίδρασης των αρνητικών τάσεων Coulomb στη σεισμικότητα
Creators: name: Κώστογλου, Αναστάσιος Μάριου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Σεισμικότητα
Μεταβολή τάσεων Coulomb
Ζώνες σκίασης τάσεων
Seismicity
Coulomb stress change
Stress shadow zones

description: Ο σκοπός της παρούσας διατριβής είναι η διερεύνηση των επιδράσεων που προκαλούν στη σεισμικότητα οι αρνητικές μεταβολές των τάσεων Coulomb, οι οποίες οφείλονται στην σεισμική ολίσθηση από ισχυρούς σεισμούς (Μ > 6.0), έξι εκ των οποίων έγιναν στην περιοχή του βορείου Αιγαίου και ένας στην βορειοδυτική Πελοπόννησο. Αρχικά τίθεται το θεωρητικό πλαίσιο αναφορικά με την μεταβολή των στατικών τάσεων Coulomb και γίνεται ανασκόπηση των αποτελεσμάτων της προηγούμενης ερευνητικής δραστηριότητας. Έπειτα παρουσιάζεται η μεθοδολογία και το λογισμικό που χρησιμοποιήθηκε για τον υπολογισμό της μεταβολής των τάσεων Coulomb. Yπολογίζονται οι μεταβολές των τάσεων Coulomb που προκάλεσαν οι ισχυροί σεισμοί και, στις περιοχές όπου οι μεταβολές είναι αρνητικές, γίνεται σύγκριση του αριθμού των σεισμών πριν και μετά τον κύριο σεισμό. Συμπληρωματικά, για τις ίδιες περιοχές, εξετάζονται οι κατανομές των σεισμών συναρτήσει των μεταβολών των τάσεων Coulomb. Τέλος, γίνεται σύγκριση της αθροιστικής εκλυόμενης σεισμικής ροπής, πριν και μετά τους κύριους σεισμούς.
description: The aim of this thesis is the investigation of the seismicity perturbations caused by the negative Coulomb stress changes due to the coseismic slip of strong earthquakes (M>6.0), six of them occurring in Northern Aegean area and one in northwestern Peloponnese. The theoretical framework of Coulomb stress changes concept is given and previous research results are reviewed. The methodology and software used for the calculation of static Coulomb stress changes is presented afterwards. After the Coulomb stress changes calculation caused by the strong earthquakes the number of earthquakes before and after the main shock is compared, for areas where the stress changes are negative. Additionally, for the same areas, the distributions of the earthquakes as a function of static stress changes are studied. Also, the cumulative seismic moment of the earthquakes, before and after the main shocks, is compared.
Accretion Disk Temperatures and Continuum Colors in QSOs
Creators: name: Bonning, E. W.
name: Cheng, L.
name: Shields, G. A.
name: Salviander, S.
name: Gebhardt, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Accretion disks around supermassive black holes are widely believed to be the dominant source of the optical-ultraviolet continuum in many classes of active galactic nuclei (AGN). We study here the relationship between the continuum colors of AGN and the characteristic accretion disk temperature (T_max). Based on NLTE models of accrection disks in AGN computed as described by Hubeny et al. (2000), we find that continuum intensity ratios for several pairs of wavelengths between 1350 and 5100 A should show a trend of bluer colors for higher T_max, notwithstanding random disk inclinations. We compare this theoretical expectation with observed colors of QSOs in the Sloan Digital Sky Survey,deriving black hole mass and thence T_max from the width of the Mg II broad emission line. The observed colors generally do not show the expected trend and in some cases show a reverse trend of redder colors with increasing T_max. The cause of this discrepancy does not appear to be dust reddening or galaxy contamination but may relate to the accretion rate, as the offset objects are accreting above ~30 % of the Eddington limit. The derived disk temperature depends primarily on line width, with little or no dependence on luminosity.
description: 7 pages, 7 figures, accepted for publication in ApJ, uses emulateapj.cls
Laser dynamics in nonlinear transparent media with electron plasma generation: effects of electron-hole radiative recombinations
Creators: name: Nteutse, P. Kameni
name: Dikandé, Alain M.
name: Zekeng, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The performance of optical devices manufactured via laser micromachining on nonlinear transparent materials, relies usually on three main factors which are the characteristic laser parameters (i.e. the laser power, pulse duration and pulse repetition rate), characteristic properties of host materials (e.g. their chromatic dispersions, optical nonlinearities or self-focusing features, etc.) and the relative importance of physical processes such as the avalanche impact ionization, multiphoton ionization and electron-hole radiative recombination processes. These factors act in conjunction to impose the regime of laser operation, in particular their competition determines the appropriate laser operation regime. In this work a theoretical study is proposed to explore the effects of the competition between multiphoton absorption, plasma ionization and electron-hole radiative recombination processes, on the laser dynamics in transparent materials with Kerr nonlinearity. The study rests on a model consisting of a K-order nonlinear complex Ginzburg-Landau equation, coupled to a first-order equation describing time variation of the electron plasma density. An analysis of stability of continuous waves, following the modulational-instability approach, reveals that the combination of multiphoton absorption and electron-hole radiative recombination processes can be detrimental or favorable to continuous-wave operation, depending on the group-velocity dispersion of the host medium. Numerical simulations of the model equations in the full nonlinear regime, reveal the eixstence of pulse trains the amplitudes of which are enhanced by the radiative recombination processes. Numerical results for the density of the induced electron plasma feature two distinct regimes of time evolution, depending on the strength of the electron-hole radiative recombination processes.
description: 19 pages, 9 figures, Journal of Optics (in press)
Ηλεκτρονικές Τραπεζικές Συναλλαγές
Creators: name: Ζαβιτσανάκη, Μαρία-Χριστίνα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ηλεκτρονικές Τραπεζικές Συναλλαγές
Electronic Banking Transactions

description: Σκοπός της διατριβής ήταν η μελέτη των ηλεκτρονικών τραπεζικών συναλλαγών. Εξετάσαμε τα οφέλη που επέφερε η ραγδαία εξέλιξη το διαδίκτυο στις τραπεζικές συναλλαγές. Στη συνέχεια παρουσιάσαμε αναλυτικά τα χαρακτηριστικά της ηλεκτρονικής τραπεζικής, το ρυθμιστικό πλαίσιο του Αστικού Κώδικα, την εφαρμογή του Π.Δ. 131/2003 και του Ν. 2251/1994, καθώς και το ζήτημα της ηλεκτρονικής υπογραφής. Ακόμη αναφερθήκαμε αναλυτικά στις ηλεκτρονικές διατραπεζικές συναλλαγές και στους τρόπους πληρωμής στο ηλεκτρονικό εμπόριο. Ένα άλλο θέμα που θίξαμε ήταν και η προστασία των προσωπικών δεδομένων στο ηλεκτρονικό εμπόριο και συγκεκριμένα στις ηλεκτρονικές τραπεζικές συναλλαγές.
description: The aim of the present thesis was the study of electronic banking transactions. We examined the benefits introduced by the rapid development of the Internet in banking transactions. Then we presented the features the features of electronic banking and the issue of electronic signatures. Furthermore, we analyzed the issue of electronic banking transactions and the issue of payment methods in the e- commerce. We also examined the protection of personal data in electronic commerce and especially in electronic banking transactions.
Unconventional superconductors under rotating magnetic field I: density of states and specific heat
Creators: name: Vorontsov, A.
name: Vekhter, I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We develop a fully microscopic theory for the calculations of the angle-dependent properties of unconventional superconductors under a rotated magnetic field. We employ the quasiclassical Eilenberger equations, and use a variation of the Brandt-Pesch-Tewordt (BPT) method to obtain a closed form solution for the Green's function. The equations are solved self-consistently for quasi-two-dimensional $d_{x^2-y^2}$ ($d_{xy}$) superconductors with the field rotated in the basal plane. The solution is used to determine the density of states and the specific heat. We find that applying the field along the gap nodes may result in minima or maxima in the angle-dependent specific heat, depending on the location in the T-H plane. This variation is attributed to the scattering of the quasiparticles on vortices, which depends on both the field and the quasiparticle energy, and is beyond the reach of the semiclassical approximation. We investigate the anisotropy across the T-H phase diagram, and compare our results with the experiments on heavy fermion CeCoIn$_5$.
description: 18 pages, 10 figures
Η Διαλεκτική Δικτατορίας και Κυριαρχίας
Creators: name: Κώττης, Γεώργιος Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Δικτατορία
Κυριαρχία
Πολιτικές αντίθετες στην κανονικότητα
Dictatorship
Sovereignty
Politics of Extraordinary

description: Σκοπός του πονήματος ήταν η μελέτη της διαλεκτικής ανάμεσα στη δικτατορία και την κυριαρχία. Eιδικότερα, το πλαίσιο αυτής της σχέσης εξετάστηκε υπό το πρίσμα της θεωρίας περί δικτατορίας του Carl Schmitt και του μαρξιστικού μοντέλου περί δικτατορίας του προλεταριάτου. Όσον αφορά τον Schmitt, εξετάσαμε, αρχικά, τη μονοδιάστατη αντίληψη του θεωρητικού του συστήματος, βάσει του οποίου ταυτίζει την κυριαρχία με την απόφαση που λαμβάνεται από τον δικτάτορα, κάτι που αποτέλεσε τροχοπέδη στην εξαγωγή μίας περισσότερο δημοκρατικής θεωρίας περί κυριαρχίας, δεδομένου πως στα σύγχρονα εθνικά κράτη κυρίαρχος είναι ο ίδιος ο λαός κι όχι μια μονοπρόσωπη εξουσία. Επιπλέον, ακολουθήσαμε τη γενικευτική ταύτιση της δικτατορίας με την εξαίρεση, η οποία όχι απλά αντίτιθεται στην ιδέα ενός κυρίαρχου λαού, αλλά στην ίδια την έννομη τάξη με την εισαγωγή εντός της της απεριόριστης βίας που συνοδεύει την εξαίρεση. Σχετικά με το μαρξιστικό-λενιστικό σχήμα περί δικατορίας του προλεταριάτου, προσπαθήσαμε να αναδείξουμε το γεγονός πως, παρά τις αντιφάσεις και παθογένειές του, κι ενώ καταφέρνει να θεμελιώσει μία προσωρινή έννομη τάξη, εντούτοις, δε καταφέρνει να πραγματώσει το στόχο της χειραφέτησης των κοινωνικών δυνάμεων, αντικρίζοντας το πρόταγμα αυτό ως αυτοδιακυβέρνηση και αυτοθέσμιση του κυρίαρχου λαού.
description: The aim of the present thesis was the examination of the dialectics between dictatorship and sovereignty. Specifically, the frame of this dialectical relationship was studied in light of Carl Schmitt’s dictatorial theory and of Marxist model of proletarian dictatorship. Dealing with Carl Schmitt, we examined, initially, his one-dimensional perception of sovereignty, which he identifies with the decision that is taken by the dictator during the state of exception. This view became an obstacle for a more democratic perception of sovereignty having in mind the fact that in modern national states the only sovereign is the People. Moreover, we observed Schmitt’s generalizing identification between dictatorship and state of exception, which is not only in contrast to the notion of sovereign People but, also, to the whole legal order, by importing the unlimited violence that accompanies the exception inside the law. Dealing with Marxist-Leninist model of proletarian dictatorship, we tried to show that, except from its contradictions, even it can incarnate a temporary legal order, finally, it cannot reach the aim of emancipation of society, the project of self-instituting and self-government of the people.
Ray Velocity Derivatives in Anisotropic Elastic Media. Part II - Polar Anisotropy
Creators: name: Ravve, Igor
name: Koren, Zvi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: In Part I of this study, we obtained the ray (group) velocity gradients and Hessians with respect to the ray locations, directions and the anisotropic model parameters, at nodal points along ray trajectories, considering general anisotropic (triclinic) media and both, quasi-compressional and quasi-shear waves. Ray velocity derivatives for anisotropic media with higher symmetries were considered particular cases of general anisotropy. In this part, Part II, we follow the computational workflow presented in Part I, formulating the ray velocity derivatives directly for polar anisotropic (transverse isotropy with tilted axis of symmetry, TTI) media for the coupled qP and qSV waves and for SH waves. The acoustic approximation for qP waves is considered a special case. The medium properties, normally specified at regular three-dimensional fine grid points, are the five material parameters: the axial compressional and shear velocities and the three Thomsen parameters, and two geometric parameters: the polar angles defining the local direction of the medium symmetry axis. All the parameters are assumed spatially (smoothly) varying, where their gradients and Hessians can be reliably computed. Two case examples are considered; the first represents compacted shale/sand rocks (with positive anellipticity) and the second, unconsolidated sand rocks with strong negative anellipticity (manifesting a qSV triplication). The ray velocity derivatives obtained in this part are first tested by comparing them with the corresponding numerical (finite difference) derivatives. Additionally, we show that exactly the same results (ray velocity derivatives) can be obtained if we transform the given polar anisotropic model parameters (five material and two geometric) into the twenty-one stiffness tensor components of a general anisotropic (triclinic) medium, and apply the theory derived in Part I.
Hay vida después del paper. La importancia y gestión de la identidad digital y la reputación online
Creators: name: Arroyo-Machado, Wenceslao
Publisher: name: Zenodo
Year: 2020
Subjects: identidad digital
reputación online
impacto
open access

description: Presentación realizada para el curso Hay vida después del paper. La importancia y gestión de la identidad digital y la reputación online.
When is a "Neem" not a "Neem"?: The influence of sentence structure on word-object association in infancy
Creators: name: Lloyd, Valerie Louise
Publisher: name: University of British Columbia
Year: 2009

description: This research was designed to address the question of whether 14-month old infants’ ability to associate word-object pairings is influenced by sentence structure. Lloyd, Werker, and Cohen (1993) have shown that 14-month old girls notice changes in word-object pairings in an habituation/dishabituation paradigm, but 8-, 10- and 12-month old infants and 14-month old boys do not. Using video images, infants were habituated to two instances of word-object pairings. A set of test trials was then shown: One in which the word-object pairing changed, and one in which it remained the same. The present research used the same habituation/dishabituation procedure in two experiments with 14-month old infants. In Experiment 1 the nonsense words were presented alone, and in Experiment 2 the nonsense words were embedded in a set of carrier phrases. The first critical question was whether the infants would notice that the word-object pairing had been changed. The second critical question was whether this ability varied across conditions: word in isolation vs word in a set of carrier phrases. The results from Experiment 1 provide clear evidence that 14-month old girls, but not boys, are able to make word-object associations when the object labels are presented in isolation. Findings from Experiment 2, in which the target words were presented in a set of carrier phrases, indicate that the particular carrier phrases presented in this study do not facilitate word-learning at this age.
THE HIGHEST GENETIC RISK OF AUTISM ASSOCIATED WITH COMMON VARIATIONS – A CLINICAL CASE
Creators: name: Shamansurov, Sh.Sh.
name: Nurmatova, Sh.O.
name: Mirdzhuraeva, N.R.
Publisher: name: Zenodo
Year: 2025

description: Autism is a neurodevelopmental disorder characterized by impairments in social interaction and communication, associated with restricted interests and stereotyped behavior. It has a high prevalence in the population, neurobiological foundations, and high heritability. Its etiology is heterogeneous, with numerous genetic factors, environmental influences, and epigenetic mechanisms recognized. Advances in molecular genetics, as well as epidemiological studies of large cohorts, have made it possible to identify specific medical conditions, as well as genes and environmental factors partially or fully associated with their pathogenesis. This knowledge, in accordance with clinical characteristics, allows for directing further research, drawing conclusions about clinical prognosis, and focusing on genetic counseling.
Η πορεία της ψύχωσης μέσα από την εμπειρία επαγγελματιών ψυχικής υγείας
Creators: name: Τζώρτζη, Παναγιώτα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ψύχωση – Ανάρρωση
Ψύχωση – Αποκατάσταση
Psychosis – Recovery
Psychosis – Rehabilitation

description: Η παρούσα ερευνητική εργασία πραγματεύεται την πορεία της ψύχωσης στη ζωή ενός ατόμου. Στόχος αυτής είναι να διαμορφωθεί μία ολοκληρωμένη εικόνα της πορείας της, καθώς και η παραγωγή προτάσεων αντιμετώπισής της. Για τους σκοπούς αυτούς, διεξήχθησαν ημι-δομημένες συνεντεύξεις με έμπειρους επαγγελματίες ψυχικής υγείας. Η ανάλυση του υλικού ακολούθησε τις βασικές αρχές της θεμελιωμένης θεωρίας. Από την ανάλυση προκύπτει πως η πορεία της ψύχωσης είναι κυρίως χρόνια και ενέχει δυσκολίες, οπότε και τονίζεται η ανάγκη αποδοχής της κατάστασης. Η σωστή αντιμετώπιση φαίνεται πως είναι απαραίτητη από την πλευρά του ατόμου, της οικογενείας, αλλά και των επαγγελματιών και των υπηρεσιών. Πέρα από τις φαρμακευτικές παρεμβάσεις, οι συμμετέχοντες αναφέρθηκαν και σε ψυχοκοινωνικές παρεμβάσεις. Σημείο ιδιαίτερου ενδιαφέροντος από τα αποτελέσματα της μελέτης αποτελεί πως, παρά τα όσα περιγράφονται παραπάνω, η ψύχωση φαίνεται πως παραμένει άγνωστη και ανεξέλεγκτη. Ακόμα, όσον αφορά την ανάρρωση και την αποκατάσταση, παρουσιάζει επίσης ιδιαίτερο ενδιαφέρον η αποσαφήνιση των εννοιών και το κατά πόσο αυτές είναι εφικτές. Ευρήματα προέκυψαν και σχετικά με τις ανάγκες των προγραμμάτων ανάρρωσης και αποκατάστασης. Τα αποτελέσματα της μελέτης θεωρούμε πως προσφέρονται για αναστοχασμό της κλινικής πρακτικής στο χώρο της ψύχωσης.
description: This research study deals with the course of psychosis in a person's life. Its aim is to portray a comprehensive picture of the progress of psychosis and to suggest proposals for addressing it. For this purpose, semi-structured interviews with experienced mental health professionals were conducted. The analysis of the material followed the basic principles of grounded theory. The analysis shows that the course of psychosis is mainly chronic and poses difficulties, so the need to accept the situation is emphasised. Appropriate management seems to be necessary on the part of the individual, the family, and the professionals and services. Apart from pharmaceutical interventions, participants also mentioned psychosocial interventions. A finding of the study worth pointing out is that, despite the aforementioned, psychosis seems to remain unknown and uncontrollable. Also, in terms of recovery and rehabilitation, it is of particular interest to clarify the concepts and assess the extent to which they are feasible. The need for recovery and rehabilitation programs was also stressed. The results of the study can offer a basis for reflection regarding clinical practice in the field of psychosis.
Detecting the effects of quantum gravity with exceptional points in optomechanical sensors
Creators: name: Cui, Dianzhen
name: Li, T.
name: Li, Jianning
name: Yi, Xuexi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this manuscript, working with a binary mechanical system, we examine the effect of quantum gravity on the exceptional points of the system. On the one side, we find that the exceedingly weak effect of quantum gravity can be sensed via pushing the system towards a second-order exceptional point, where the spectra of the non-Hermitian system exhibits non-analytic and even discontinuous behavior. On the other side, the gravity perturbation will affect the sensitivity of the system to deposition mass. In order to further enhance the sensitivity of the system to quantum gravity, we extend the system to the other one which has a higher-order (third-order) exceptional point. Our work provides a feasible way to use exceptional points as a new tool to explore the effect of quantum gravity.
description: 10 pages, 9 figures
Geometry of Vlasov kinetic moments: a bosonic Fock space for the symmetric Schouten bracket
Creators: name: Gibbons, John
name: Holm, Darryl D
name: Tronci, Cesare
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mathematical Physics (math-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The dynamics of Vlasov kinetic moments is shown to be Lie-Poisson on the dual Lie algebra of symmetric contravariant tensor fields. The corresponding Lie bracket is identified with the symmetric Schouten bracket and the moment Lie algebra is related with a bundle of bosonic Fock spaces, where creation and annihilation operators are used to construct the cold plasma closure. Kinetic moments are also shown to define a momentum map, which is infinitesimally equivariant. This momentum map is the dual of a Lie algebra homomorphism, defined through the Schouten bracket. Finally the moment Lie-Poisson bracket is extended to anisotropic interactions.
description: 19 pages, no figures. Submitted to Phys. Lett. A
Between Mirrors AI as Reflection and Passage
Creators: name: Souza Silva, Jaconaazar
Publisher: name: Zenodo
Year: 2025
Subjects: Algorithmic Mirror
Artificial Intelligence
Digital Subjectivity
Critical Algorithmic Literacy
Symbolic Reflection
Human-AI Interaction
Self-awareness
XChronos Project
Recommender Systems
Data Visualization

description: This article explores the conceptual and practical intersections between two distinct reflections on artificial intelligence as a mirror of human subjectivity: the academic tool Algorithmic Mirror and the symbolic essay OpenAI as the Mirror of Erised. Drawing from both empirical data visualization and psychological metaphor, the paper analyzes how AI can function either as an instrument of critical literacy or as a symbolic projection of personal desire. It proposes a hybrid path, aligned with the XChronos Project's mission, to use AI as a medium for introspective awareness and digital emancipation. The study bridges algorithmic transparency with symbolic ethics, offering an innovative framework for understanding ourselves through the systems we create.
Pulsar Emission and Force-Free Electrodynamics
Creators: name: Gruzinov, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Pulsar emission should primarily come from the magnetic separatrix... Combining theory and observations, we show that force-free electrodynamics (FFE) gives an accurate description of the large-scale electromagnetic field in the magnetospheres of Crab-like pulsars. A robust prediction of FFE is the existence and stability of a singular current layer on the magnetic separatrix. We argue that most of the observed pulsar emission comes from this singular current layer.
description: 6 pages
Discrepancy of Symmetric Products of Hypergraphs
Creators: name: Doerr, Benjamin
name: Gnewuch, Michael
name: Hebbinghaus, Nils
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11K38

description: For a hypergraph ${\mathcal H} = (V,{\mathcal E})$, its $d$--fold symmetric product is $Δ^d {\mathcal H} = (V^d,\{E^d |E \in {\mathcal E}\})$. We give several upper and lower bounds for the $c$-color discrepancy of such products. In particular, we show that the bound ${disc}(Δ^d {\mathcal H},2) \le {disc}({\mathcal H},2)$ proven for all $d$ in [B. Doerr, A. Srivastav, and P. Wehr, Discrepancy of {C}artesian products of arithmetic progressions, Electron. J. Combin. 11(2004), Research Paper 5, 16 pp.] cannot be extended to more than $c = 2$ colors. In fact, for any $c$ and $d$ such that $c$ does not divide $d!$, there are hypergraphs having arbitrary large discrepancy and ${disc}(Δ^d {\mathcal H},c) = Ω_d({disc}({\mathcal H},c)^d)$. Apart from constant factors (depending on $c$ and $d$), in these cases the symmetric product behaves no better than the general direct product ${\mathcal H}^d$, which satisfies ${disc}({\mathcal H}^d,c) = O_{c,d}({disc}({\mathcal H},c)^d)$.
description: 12 pages, no figures
Prism international
Creators: name: Prism International
Publisher: name: Vancouver : The Creative Writing Program of the University of British Columbia
Year: 2015

description: The following description is provided by the publisher:
 FICTION CONTEST
 “Judge’s Essay” by Jessica Grant
 Winning Entry
 “Ms. Pacman” by Josie Sigler
 Runners-Up
 “The Lights on Canada Day” by Susan Mersereau
 “In the Foothills” by Andrew Forbes
 POETRY CONTEST
 “Judge’s Essay” by Jen Currin
 Winning Entry
 “Self-Portrait” by Susan Steudel
 Runners-Up
 “Ghazal of Perpetual Motion” by Kyeren Regehr
 “Toward a List of Definitions According to My Scottish Mother” by Patricia Young
 FICTION
 “Migration” by Alexander Weinstien
 POETRY
 “Meeting My Body Double” by Jared Harel
 Four Poems by Meredith Quartermain
 “Untitled” by Daniel Zomparelli
 “Dead Bird Babies” by Stevie Howell
 “Two Poems by Nathaniel G. Moore
 COVER IMAGE
 “Soup,” by Mandy Barker
Critical properties and stability of stationary solutions in multi-transonic pseudo-Schwarzschild accretion
Creators: name: Chaudhury, Soumini
name: Ray, Arnab K.
name: Das, Tapas Kumar
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: For inviscid, rotational accretion flows, both isothermal and polytropic, a simple dynamical systems analysis of the critical points has given a very accurate mathematical scheme to understand the nature of these points, for {\em any} pseudo-potential by which the flow may be driven on to a Schwarzschild black hole. This allows for a complete classification of the critical points for a wide range of flow parameters, and shows that the only possible critical points for this kind of flow are saddle points and centre-type points. A restrictive upper bound on the angular momentum of critical solutions has been established. A time-dependent perturbative study reveals that the form of the perturbation equation, for both isothermal and polytropic flows, is invariant under the choice of any particular pseudo-potential. Under generically true outer boundary conditions, the inviscid flow has been shown to be stable under an adiabatic and radially propagating perturbtion. The perturbation equation has also served the dual purpose of enabling an understanding of the acoustic geometry for inviscid and rotational flows.
description: Final version to appear in MNRAS. 12 pages, one colour and 3 black and white figures