cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum Hall Smectics, Sliding Symmetry and the Renormalization Group
Creators: name: Lawler, Michael J.
name: Fradkin, Eduardo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this paper we discuss the implication of the existence of a sliding symmetry, equivalent to the absence of a shear modulus, on the low-energy theory of the quantum hall smectic (QHS) state. We show, through renormalization group calculations, that such a symmetry causes the naive continuum approximation in the direction perpendicular to the stripes to break down through infrared divergent contributions originating from naively irrelevant operators. In particular, we show that the correct fixed point has the form of an array of sliding Luttinger liquids which is free from superficially "irrelevant operators". Similar considerations apply to all theories with sliding symmetries.
description: 7 pages, 3 figures
On the decrease of the number of bound states with the increase of the angular momentum
Creators: name: Brau, Fabian
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For the class of central potentials possessing a finite number of bound states and for which the second derivative of $r V(r)$ is negative, we prove, using the supersymmetric quantum mechanics formalism, that an increase of the angular momentum $\ell$ by one unit yields a decrease of the number of bound states of at least one unit: $N_{\ell+1}\le N_{\ell}-1$. This property is used to obtain, for this class of potential, an upper limit on the total number of bound states which significantly improves previously known results.
Dynamical localization, measurements and quantum computing
Creators: name: Terraneo, M.
name: Shepelyansky, D. L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: Condensed Matter (cond-mat)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study numerically the effects of measurements on dynamical localization in the kicked rotator model simulated on a quantum computer. Contrary to the previous studies, which showed that measurements induce a diffusive probability spreading, our results demonstrate that localization can be preserved for repeated single-qubit measurements. We detect a transition from a localized to a delocalized phase, depending on the system parameters and on the choice of the measured qubit.
description: 4 pages, 4 figures, research at Quantware MIPS Center http://www.quantware.ups-tlse.fr
193 Briefe und Kärtchen, 2 Umschläge an Barbara Hess-Wegmann
Brief an Hess-Wegmann ...
Creators: name: Lavater, Johann Caspar
Publisher: name: [s.n.]
Year: 1787

description: von Johann Caspar Lavater
description: 1 Brief undatiert, enthält Auszüge aus dem "Gastmahl" von J.G. Schlosser von 1794 (Nr. I.13); 4 Kärtchen undatiert (Nr. II.1-4)
description: Davon 1 Brief von Johann Caspar Lavater und Magdalena Hess (Nr. I.6); 2 Briefe (wovon einer doppelt und einer diktiert von J.C. Lavater) von Magdalena Hess (Nr. II.105, II.106 und II.107); 1 Brief auch an Barbara Geßner-Heß, Barbara Körner, Barbara Zimmermann und Barbara Hess (Nr. I.31); 1 Brief mit Beischrift von Barbara Hess-Wegmann (Nr. I.19); 1 Brief mit Antwort Lavaters auf Anfrage von Barbara Hess-Wegmann (Nr. II.22); 1 Brief mit Antwort von Barbara Hess-Wegmann (Nr. II.82); 1 Brief an Ludwig Hess (Nr. I.10); 3 Briefe an Johann Jakob Stolz (Nr. I.14, I.17 und II.6); 1 Brief mitadressiert an Dorothea Ulrich-Heß (Nr. II.112)
description: Davon 1 Rundschreiben mit Fazit von Lavaters Reise nach Kopenhagen, dat. 26.8.1793 (Nr. I.9)
Cramer, C. F
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1820

description: Ort: Basel
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
A Paul Trap with Sectored Ring Electrodes for Experiments with Two-Dimensional Ion Crystals
Creators: name: Ivory, M. K.
name: Kato, A.
name: Hasanzadeh, A.
name: Blinov, B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We have developed an trapped ion system for producing two-dimensional (2D) ion crystals for applications in scalable quantum computing, quantum simulations, and 2D crystal phase transition and defect studies. The trap is a modification of a Paul trap with its ring electrode flattened and split into eight identical sectors, and its two endcap electrodes shaped as truncated hollow cones for laser and imaging optics access. All ten trap electrodes can be independently DC-biased to create various aspect ratio trap geometries. We trap and Doppler cool 2D crystals of up to 30 Ba+ ions and demonstrate the tunability of the trapping potential both in the plane of the crystal and in the transverse direction.
description: 4 pages, 3 figures. To be published in Review of Scientific Instruments
Model of the quantized electromagnetic field in the presence of classical sources
Creators: name: Naudts, Jan
name: De Roeck, Wojciech
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81T10

description: We give a rigorous description of a model of the quantized electromagnetic field interacting with quantized current fields. In the special case of classical currents our results agree with common knowledge about the problem. A toy model of a quantum current is studied as well.
description: extended version (from 13 to 20 pages), including an example of a quantum current
A Greedy Heuristic Algorithm for Location-based Group Formation
Creators: name: Sukstrienwong, Anon
Publisher: name: TEM Journal
Year: 2019

description: Presently, location-based Group formation has become more important in many areas. Fundamentally, it is a way to assign all members to suitable groups in order to gain the maximum benefits and accomplish their objectives. However, the process of group formation based on member’s location may cause a problem as it can be time-consuming if the number of members is large and more factors are considered in forming the groups. In order to cope with this problem, we proposed two variants of heuristic algorithm based on greedy algorithm in order to generate the optimized groups of nearby individual members, who are located in different locations. In this paper, we present our experimental results and illustrate that it produces optimal results for small problem sizes. Additionally, the experimental results demonstrated that the greedy algorithms produce the solutions with the intent of finding a global optimum. Keywords – Greedy Algorithm, Group Composition, Group Formation, Location-based Formation, Optimization.
Aerny, Gebrüder
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1820

description: Ort: Aarburg
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
[Johann Jacob Scheuchzer]: Meteorologia Helvetica
Creators: name: Scheuchzer, Johann Jacob
Publisher: name: [s.n.]
Year: 1721

description: Enthält: Abhandlung über Jahreszeiten, Winde, Wolken, Regen, Tau, Mehltau, Hagel, Schnee, Feuermeteore, Erdbeben, Regenbogen, Mondhöfe etc. / Chronik von aufälligen meteorologischen Erscheinungen von 709-1699 / Eine Darstellung der Witterung von 1701-1721 mit Angabe der jährlichen (1706-1711) und monatlichen (1718-1721) barometrischen Maxima und Minima / Exkurs über die Ursachen des Erdbebens im Glarnerland / Bemerkungen über den Zusammenhang zwischen seismischen und atmosphärischen Erscheinungen / Diverse Handzeichnungen und Stiche
Timing and spectral changes of the Be X-ray transient EXO 0531-6609.2 through high and low state
Creators: name: Rea, Nanda
name: Israel, Gian Luca
name: Di Salvo, Tiziana
name: Burderi, Luciano
name: Cocozza, Gabriele
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on spectral and timing analysis of BeppoSAX data of the 13.6 s period transient X-ray pulsar EXO 0531-6609.2. Observations were carried out in March 1997 and October 1998, catching the source during a high and a low emission state, respectively. Correspondingly, the X-ray luminosity is found at a level of 4.2x10^37 erg/s and 1.5x10^36 erg/s in the two states. In the high state the X-ray emission in the energy range 1-100 keV is well fitted by an absorbed power-law with photon index Gamma ~1.7 plus a blackbody component with a characteristic temperature of ~3.5 keV. Moreover, we find an evidence of an iron emission at ~6.8 keV, typical feature in this class of sources but never revealed before in the EXO 0531-6609.2 spectrum. In the low state an absorbed power-law with Gamma ~0.4 is sufficient to fit the 1-10 keV data. During BeppoSAX observations EXO 0531-6609.2 display variations of the pulse profile with the X-ray flux: it showed single peaked and double peaked profiles in the low and high state, respectively. Based on these two observations we infer a spin-up period derivative of -(1.14+/-0.08)x10^-10 s/s. By comparing these with other period measurements reported in literature we find an alternating spin-up and spin-down behaviour that correlates well with the X-ray luminosity.
description: 6 pages, 8 figures, A&A
Manipulation of Diatomic Molecules with 'Oriented External Electric Fields': Linear Correlations in Atomic Properties Lead to Non-Linear Molecular Responses
Creators: name: Sowlati-Hashjin, Shahin
name: Karttunen, Mikko
name: Matta, Cherif F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: 'Oriented external electric fields (OEEFs)' have been shown to have great potential in being able to provide unprecedented control of chemical reactions, catalysis and selectivity with applications ranging from H2 storage to molecular machines. We report a theoretical study of the atomic origins of molecular changes due to OEEFs; understanding the characteristics of OEEF-induced couplings between atomic and molecular properties is an important step toward comprehensive understanding of the effects of strong external fields on molecular structure, stability, and reactivity. We focus on the atomic and molecular (bond) properties of a set of homo- (H2, N2, O2, F2, and Cl2) and hetero-diatomic (HF, HCl, CO, and NO) molecules under intense external electric fields in the context of quantum theory of atoms in molecules (QTAIM). It is shown that atomic properties (atomic charges and energies, and localization index) correlate linearly with the field strengths, but molecular properties (bond length, electron density at bond critical point, bond length, and electron delocalization index) exhibit non-linear responses to the imposed fields. In particular, the changes in the electron density distribution alter the shapes and locations of the zero-flux surfaces, atomic volumes, atomic electron population, and localization/delocalization indices. At the molecular level, the topography and topology of the molecular electrostatic potential undergo dramatic changes. The external fields also perturb the covalent-polar-ionic characteristic of the studied chemical bonds, hallmarking the impact of electric fields on the stability and reactivity of chemical compounds. The findings are well-rationalized within the framework of the quantum theory of atoms in molecules and form a coherent conceptual understanding of these effects in prototypical molecules such as diatomics.
Albassini, Steffan (Albasini?)
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1820

description: Ort: Intra
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
title: Component Interaction in Distributed Knowledge-Based Systems
Creators: name: Marinov, Milko
name: Valova, Irena
Publisher: name: TEM Journal
Year: 2019

description: The process of group decision making requires a set of databases and knowledge bases with coordinated communication between them. A distributed knowledge-based system consists of several knowledge-based systems, and there is a possibility for their physical or logical separation. The article presents the conceptual model of a distributed knowledge-based system. The suggested architecture supports sharing and integration of knowledge and data in addition to allowing heterogeneous knowledge-based systems to communicate with each other. The article also outlines the implementation of interaction protocols comprising intelligent objects which cooperate with each other in order to find solutions to assigned tasks. Keywords – Decision support systems, Distributed knowledge-based system, Interaction protocols, Multi-agent systems.
Ackermann, Johann Philipp
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1820

description: Ort: Mannheim
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Vortex lattice of a Bose-Einstein Condensate in a rotating anisotropic trap
Creators: name: Oktel, M. O.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We study the vortex lattices in a Bose-Einstein Condensate in a rotating anisotropic harmonic trap. We first investigate the single particle wavefunctions obtained by the exact solution of the problem and give simple expressions for these wavefunctions in the small anisotropy limit. Depending on the strength of the interactions, a few or a large number of vortices can be formed. In the limit of many vortices, we calculate the density profile of the cloud and show that the vortex lattice stays triangular. We also find that the vortex lattice planes align themselves with the weak axis of the external potential. For a small number of vortices, we numerically solve the Gross-Pitaevskii equation and find vortex configurations that are very different from the vortex configurations in an axisymmetric rotating trap.
description: 15 pages,4 figures
A new interface capturing method for Allen-Cahn type equations based on a flow dynamic approach in Lagrangian coordinates, I. One-dimensional case
Creators: name: Cheng, Q.
name: liu, Chun
name: Shen, J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We develop a new Lagrangian approach --- flow dynamic approach to effectively capture the interface in the Allen-Cahn type equations. The underlying principle of this approach is the Energetic Variational Approach (EnVarA), motivated by Rayleigh and Onsager \cite{onsager1931reciprocal,onsager1931reciprocal2}. Its main advantage, comparing with numerical methods in Eulerian coordinates, is that thin interfaces can be effectively captured with few points in the Lagrangian coordinate. We concentrate in the one-dimensional case and construct numerical schemes for the trajectory equation in Lagrangian coordinate that obey the variational structures, and as a consequence, are energy dissipative. Ample numerical results are provided to show that only a fewer points are enough to resolve very thin interfaces by using our Lagrangian approach.
Photoinduced phase separation in the lead halides is a polaronic effect
Creators: name: Limmer, David T.
name: Ginsberg, Naomi S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a perspective on recent observations of the photoinduced phase separation of halides in multi-component lead-halide perovskites. The spontaneous phase separation of an initial homogeneous solid solution under steady-state illumination conditions is found experimentally to be reversible, stochastic, weakly dependent on morphology, yet strongly dependent on composition and thermodynamic state. Regions enriched in a specific halide species that form upon phase separation are self-limiting in size, pinned to specific compositions, and grow in number in proportion to the steady-state carrier concentration until saturation. These empirical observations of robustness rule out explanations based on specific defect structures and point to the local modulation of an existing miscibility phase transition in the presence of excess charge carriers. A model for rationalizing existing observations based on the coupling between composition, strain and charge density fluctuations through the formation of polarons is reviewed.
description: Light edits for clarity
Matrix Kernels for the Gaussian Orthogonal and Symplectic Ensembles
Creators: name: Tracy, Craig A.
name: Widom, Harold
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We derive the limiting matrix kernels for the the Gaussian Orthogonal and Symplectic ensembles scaled at the edge, with proofs of convergence in the operator norms that assure convergence of the determinants.
description: 10 pages, LaTeX
TIRADS supplementary data
Creators: name: Cawood, Tom
name: Mackay, Georgia
name: Hunt, Penny
name: O'Shea, Dona
name: Skehan, Sean
name: Ma, Yi
Publisher: name: figshare
Year: 2020
Subjects: subject: 111202 Cancer Diagnosis
subject: FOS: Clinical medicine

description: Supplementary data TIRADS paper
Speeding simulation analysis up with yt and Intel Distribution for Python
Creators: name: Cielo, Salvatore
name: Iapichino, Luigi
name: Baruffa, Fabio
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: As modern scientific simulations grow ever more in size and complexity, even their analysis and post-processing becomes increasingly demanding, calling for the use of HPC resources and methods. yt is a parallel, open source post-processing python package for numerical simulations in astrophysics, made popular by its cross-format compatibility, its active community of developers and its integration with several other professional Python instruments. The Intel Distribution for Python enhances yt's performance and parallel scalability, through the optimization of lower-level libraries Numpy and Scipy, which make use of the optimized Intel Math Kernel Library (Intel-MKL) and the Intel MPI library for distributed computing. The library package yt is used for several analysis tasks, including integration of derived quantities, volumetric rendering, 2D phase plots, cosmological halo analysis and production of synthetic X-ray observation. In this paper, we provide a brief tutorial for the installation of yt and the Intel Distribution for Python, and the execution of each analysis task. Compared to the Anaconda python distribution, using the provided solution one can achieve net speedups up to 4.6x on Intel Xeon Scalable processors (codename Skylake).
description: 3 pages, 1 figure, published on Intel Parallel Universe Magazine
Cramp. A. & Co
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1820

description: Ort: St. Petersburg
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Für Jungen und Mädchen geeignet
Creators: name: Krabel, Jens
name: Hechler, Andreas
Publisher: name: Humboldt-Universität zu Berlin
Year: 2007
Subjects: subject: Jungenarbeit
subject: Männlichkeit
subject: Pädagogik
subject: 370 Bildung und Erziehung

description: Praktische Anregungen für die Jungenarbeit in Kindertageseinrichtungen.
Alioth, J. S., & Co
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1820

description: Ort: Mulhouse
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Topological Field Theory far from Equilibrium
Creators: name: Tonielli, Federico
name: Budich, Jan Carl
name: Altland, Alexander
name: Diehl, Sebastian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The observable properties of topological quantum matter are often described by topological field theories. We here demonstrate that this principle extends beyond thermal equilibrium. To this end, we construct a model of two-dimensional driven open dynamics with a Chern insulator steady state. Within a Keldysh field theory approach, we show that under mild assumptions - particle number conservation and purity of the stationary state - an abelian Chern-Simons theory describes its response to external perturbations. As a corollary, we predict chiral edge modes stabilized by a dissipative bulk.
description: 9 pages, 5 figures
Albertis, Gebrüder
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1820

description: Ort: Rorschach
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
A generalized polygamma function
Creators: name: Espinosa, Olivier
name: Moll, Victor H.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 33B99, 11M35

description: We study the properties of a function $ψ(z, q)$ (the generalized polygamma function), intimately connected with the Hurwitz zeta function and defined for complex values of the variables $z$ and $q$, which is entire in the variable $z$ and reduces to the usual polygamma function $ψ^{(m)}(q)$ for $z$ a non-negative integer $m$, and to the balanced negapolygamma function $ψ^{(-m)}(q)$ for $z$ a negative integer $-m$.
description: 14 pages
D9.5: E-CAM Public Wiki-like pages and newsletters V
Creators: name: Mackernan, Donal
name: Mendonça, Ana
name: Couton, Louise
Publisher: name: Zenodo
Year: 2021

description: This deliverable is an update of D9.4: E-CAM Public Wiki-like pages and newsletters IV [1]. The pandemic and associated lock-downs starting in earlyMarch 2020 led to a postponement of all face to face dissemination actions due to the closure of universities, delays in reporting. In D9.4, as a consequence we took the opportunity to include in that report data from Q2 of 2020 (i.e. to report over 5 rather than the originally planned 4 quarters). The present report D9.5 is on data collected since July 1 2020 - which is 3 quarters rather than the 5. It consists of: (1) a summary of the impact of our dissemination strategy measured in terms of web traffic statistics; (2) updates to the E-CAM website to intensify efforts to disseminate results and ensure sustainability of the website beyond the current funding; (3) newsletters issues published since the submission of D9.4, and (4) a conclusion. Regarding (1) the total number of visitors to E-CAM website since February 10, 2017 (from when we started collecting web traffic data statistics) is 190952, with 25551 visiting our pages from July 1 2020 till March 23 2021 - and is roughly in line with the daily rate for the previous reporting period, that is, about 70 visitors per day on average. While the cancellation of face-to-face events during the COVID-19 pandemic had an impact on the number of visits to our website in Q1 and Q2 of 2020, and that has continued into 2021, nevertheless, interest in our scientific publications has continued to increase. Also the science and comics initiative has attracted significant attention. During this last period we made an additional effort to disseminate on our website the results obtained during the project’s final ramp. Consequently, the content of the E-CAM website increased considerably, mainly on the following pages on the website: Individual pilot project pages; Case studies/Success stories page Events calendar Scientific publications page News-blog page. Additionally, to increase attention to successes demonstrating the increasing impact of E-CAM we have updated the website to include: Biosensor news-blog page; Highlights from the E-CAM project page. We have developed an E-CAM web-page on the Centre Européen de Calcul Atomique et Moléculaire (CECAM) website: https://www.cecam.org/e-cam to ensure that E-CAM’s most important results continue to be disseminated and communicated to the target groups even after the EU funding period, as well as the future activities that we plan to run beyond March 2021 (project end-date). A large amount of new material has been disseminated since July 1 2020, notwithstanding the difficulties produced by the pandemic. Many of these are to be seen in the last three issues of the E-CAM newsletter. They together with recent workshops held online, software, scientific results and new IP (not described explicitly here for commercial reasons) are intensifying interest in E-CAM within the simulation community and beyond.
Absence of kinetic effects in reaction-diffusion processes in scale-free networks
Creators: name: Gallos, Lazaros K.
name: Argyrakis, Panos
Publisher: name: arXiv
Year: 2004
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that the chemical reactions of the model systems of A+A->0 and A+B->0 when performed on scale-free networks exhibit drastically different behavior as compared to the same reactions in normal spaces. The exponents characterizing the density evolution as a function of time are considerably higher than 1, implying that both reactions occur at a much faster rate. This is due to the fact that the discerning effects of the generation of a depletion zone (A+A) and the segregation of the reactants (A+B) do not occur at all as in normal spaces. Instead we observe the formation of clusters of A (A+A reaction) and of mixed A and B (A+B reaction) around the hubs of the network. Only at the limit of very sparse networks is the usual behavior recovered.
description: 4 pages, 4 figures, to be published in Physical Review Letters
Additional file 1 of Choice of intraoperative ultrasound adjuncts for brain tumor surgery
Creators: name: Kumar, Manoj
name: Noronha, Santosh
name: Rangaraj, Narayan
name: Moiyadi, Aliasgar
name: Shetty, Prakash
name: Singh, Vikas Kumar
Publisher: name: figshare
Year: 2022
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: Additional file 1. Correlation matrices and details of the redesigned variables.
Anisotropic normal-state properties of the MgB2 superconductor
Creators: name: de la Mora, Pablo
name: Castro, Miguel
name: Tavizon, Gustavo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Based on the experimentally found existence of two gaps in MgB2 (one gap associated to the boron sigma-states and the other to the boron pi-states), the different contributions to the transport properties, electrical conductivity and Hall coefficient, were studied using the full potential-linearized augmented plane wave method and the generalized gradient approximation. MgB2 doping was analyzed in the rigid band approximation. This permitted the study of the partial substitution of magnesium for aluminium (Mg1-xAlxB2) as well as other substitutions such as AB2 (A=Be, Zr, Nb and Ta). The sigma-bands (boron sigma-states), which are associated to the large superconducting gap, are very anisotropic at EF, while the pi-bands have very little anisotropic character. In (Mg1-xAlxB2) Tc diminishes with Al content, the other compounds are not superconductors. In this work it was found that with electron doping, such as Al substitution, the sigma-band conductivity decreases and the corresponding bands become less anisotropic. sigma-band contribution for BeB2 and ScB2 at EF is very small and the anisotropy is much lower. For Zr, Nb and Ta there are no sigma-bands at EF. These results give a connection between superconductivity and the character of the sigma-band; band conductivity and band anisotropy. This gives a plausible explanation for the diminution of Tc with different doping of MgB2.
Community detectability and structural balance dynamics in signed networks
Creators: name: Morrison, Megan
name: Gabbay, Michael
Publisher: name: arXiv
Year: 2019
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: 91C20, 15B52, 91D30

description: We investigate signed networks with community structure with respect to their spectrum and their evolution under a dynamical model of structural balance, a prominent theory of signed social networks. The spectrum of the adjacency matrix generated by a stochastic block model with two equal size communities shows detectability transitions in which the community structure becomes manifest when its signal eigenvalue appears outside the main spectral band. The spectrum also exhibits "sociality" transitions involving the homogeneous structure representing the average tie value. We derive expressions for the eigenvalues associated with the community and homogeneous structure as well as the transition boundaries, all in good agreement with numerical results. Using the stochastically-generated networks as initial conditions for a simple model of structural balance dynamics yields three outcome regimes: two hostile factions that correspond with the initial communities, two hostile factions uncorrelated with those communities, and a single harmonious faction of all nodes. The detectability transition predicts the boundary between the assortative and mixed two-faction states and the sociality transition predicts that between the mixed and harmonious states. Our results may yield insight into the dynamics of cooperation and conflict among actors with distinct social identities.
Defect formation in the Swift-Hohenberg equation
Creators: name: Galla, Tobias
name: Moro, Esteban
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study numerically and analytically the dynamics of defect formation during a finite-time quench of the two dimensional Swift-Hohenberg (SH) model of Rayleigh-Benard convection. We find that the Kibble-Zurek picture of defect formation can be applied to describe the density of defects produced during the quench. Our study reveals the relevance of two factors: the effect of local variations of the striped patterns within defect-free domains and the presence of both point-like and extended defects. Taking into account these two aspects we are able to identify the characteristic length scale selected during the quench and to relate it to the density of defects. We discuss possible consequences of our study for the analysis of the coarsening process of the SH model.
description: 5 pages, 4 figures, accepted for publication by Phys. Rev. E (Rapid Comm.)
Towards Automating IP-Network Operations with Machine Learning from Raw Network Data
Creators: name: Mohammed, Ayse Rumeysa
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2024
Subjects: Machine Learning
Computer Networks
Automation
Optimization

description: The ever-increasing size and complexity of communication networks today complicate Network Operation Centers (NOC) to function efficiently in manually operated tasks such as network status detection, network fault localization, cost-aware traffic engineering, failure management, and network quality assurance. These tasks have traditionally been managed by expert technicians who make decisions on when and where to take which actions based on specific network rules. Due to the complexity of the process, NOC actions are still performed manually. However, automating this process could be a valuable input for network providers and service operators. In this context, we developed an Artificial Intelligence based (AI-based) action recommendation engine (ARE) which, as its name suggests, recommends the best available operational expenditure aware (OPEX-aware) action, either with (Stateful ARE) or without (Stateless ARE) measuring the network state. Our experimental results show that Stateful ARE can recommend the suitable action and yield up to 99% accuracy. This high accuracy percentage is due to the correct classification of the Normal state, which represents 64.5% of the dataset, and its corresponding action of Do Nothing, which accounts for 68.3% of all actions While Stateful ARE’s overall accuracy is satisfactory, it was unable to achieve this performance in minority classes, and it suffered from performance degradation due to state classification process. Therefore, we introduced Stateless ARE, which recommends actions without measuring the network state. The initial results of Stateless ARE using a Feed Forward Neural Network (FFNN) did not exceed Stateful ARE’s performance. The classification accuracy of minority classes were still around 89% and 93%, but it outperformed the static network, indicating that it could be improved with further optimization techniques. Based on this insight, we introduced state-of-the-art Transformer model as Stateless ARE model. The transformer model significantly improved the accuracy of the minority classes to 97% and 99%, which other methodologies struggled to classify. This result shows that the transformer model can be an effective tool in improving the performance of action recommendation engines.
Kahler Moduli Stabilization and the Propagation of Decidability
Creators: name: Halverson, James
name: Plesser, Michael
name: Ruehle, Fabian
name: Tian, Jiahua
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Diophantine equations are in general undecidable, yet appear readily in string theory. We demonstrate that numerous classes of Diophantine equations arising in string theory are decidable and propose that decidability may propagate through networks of string vacua due to additional structure in the theory. Diophantine equations arising in index computations relevant for D3-instanton corrections to the superpotential exhibit propagation of decidability, with new and existing solutions propagating through networks of geometries related by topological transitions. In the geometries we consider, most divisor classes appear in at least one solution, significantly improving prospects for Kahler moduli stabilization across large ensembles of string compactifications.
description: 12 pages, one figure
Broken Ergodicity in classically chaotic spin systems
Creators: name: Borgonovi, F.
name: Celardo, G. L.
name: Maianti, M.
name: Pedersoli, E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A one dimensional classically chaotic spin chain with asymmetric coupling and two different inter-spin interactions, nearest neighbors and all-to-all, has been considered. Depending on the interaction range, dynamical properties, as ergodicity and chaoticity are strongly different. Indeed, even in presence of chaoticity, the model displays a lack of ergodicity only in presence of all to all interaction and below an energy threshold, that persists in the thermodynamical limit. Energy threshold can be found analytically and results can be generalized for a generic XY model with asymmetric coupling.
description: 6 pages, 3 figures
Chemical and kinematic structure of extremely high-velocity molecular jets in the Serpens Main star-forming region
Creators: name: Tychoniec, Łukasz
name: Hull, Charles L. H.
name: Kristensen, Lars E.
name: Tobin, John J.
name: Gouellec, Valentin J. M. Le
name: van Dishoeck, Ewine F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The fastest molecular component to the protostellar outflows -- extremely high-velocity (EHV) molecular jets -- are still puzzling since they are seen only rarely. The first aim is to analyze the interaction between the EHV jet and the slow outflow by comparing their outflow force content. The second aim is to analyze the chemical composition of the different outflow velocity components and to reveal the spatial location of molecules. ALMA 3 mm and 1.3 mm observations of five outflow sources at 130 -- 260 au resolution in the Serpens Main cloud are presented. Observations of CO, SiO, H$_2$CO and HCN reveal the kinematic and chemical structure of those flows. Three velocity components are distinguished: the slow and the fast wing, and the EHV jet. Out of five sources, three have the EHV component. Comparison of outflow forces reveals that only the EHV jet in the youngest source Ser-emb 8 (N) has enough momentum to power the slow outflow. The SiO abundance is generally enhanced with velocity, while HCN is present in the slow and the fast wing, but disappears in the EHV jet. For Ser-emb 8 (N), HCN and SiO show a bow-shock shaped structure surrounding one of the EHV peaks suggesting sideways ejection creating secondary shocks upon interaction with the surroundings. Also, the SiO abundance in the EHV gas decreases with distance from this protostar, whereas that in the fast wing increases. H$_2$CO is mostly associated with low-velocity gas but also appears surprisingly in one of the bullets in the Ser-emb~8~(N) EHV jet. The high detection rate suggests that the presence of the EHV jet may be more common than previously expected. The origin and temporal evolution of the abundances of SiO, HCN and H$_2$CO through high-temperature chemistry are discussed. The data are consistent with a low C/O ratio in the EHV gas versus high C/O ratio in the fast and slow wings.
description: 25 pages, 20 figures, Accepted for publication in the Astronomy & Astrophysics
Nette Technologies
Creators: name: Lowrance, Chanda Mandisa
Publisher: name: Zenodo
Year: 2025

description: Nette Technologies is a cutting-edge nanotechnology research company focused on advancing innovations in nanoparticle science and its applications. The company is dedicated to pushing the boundaries of nanotechnology to create transformative solutions that drive progress and enhance sustainability. With expertise in nanoparticle development, Nette Technologies specializes in the exploration and commercialization of nanomaterials for industries ranging from healthcare to environmental science.

Nanotechnology plays a crucial role in solving modern challenges across multiple sectors, yet many research initiatives struggle with scalability, optimization, and practical implementation. Nette Technologies aims to bridge the gap between theoretical advancements and real-world applications by integrating scientific research with industry-focused commercialization strategies. For more information and updates, visit https://nettetechnologies.neocities.org/.
Collimated outflows from long-lived binary neutron star merger remnants
Creators: name: Ciolfi, Riccardo
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The connection between short gamma-ray bursts (SGRBs) and binary neutron star (BNS) mergers was recently confirmed by the association of GRB 170817A with the merger event GW170817. However, no conclusive indications were obtained on whether the merger remnant that powered the SGRB jet was an accreting black hole (BH) or a long-lived massive neutron star (NS). Here, we explore the latter case via BNS merger simulations covering up to 250 ms after merger. We report, for the first time in a full merger simulation, the formation of a magnetically-driven collimated outflow along the spin axis of the NS remnant. For the system at hand, the properties of such an outflow are found largely incompatible with a SGRB jet. With due consideration of the limitations and caveats of our present investigation, our results favour a BH origin for GRB 170817A and SGRBs in general. Even though this conclusion needs to be confirmed by exploring a larger variety of physical conditions, we briefly discuss possible consequences of all SGRB jets being powered by accreting BHs.
description: 6 pages, 4 figures; accepted for publication in MNRAS Letters
Partial-Symmetry-Breaking Phase Transitions
Creators: name: Hanada, Masanori
name: Robinson, Brandon
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We demonstrate a novel feature of certain phase transitions in theories with large rank symmetry group that exhibit specific types of non-local interactions. A typical example of such a theory is a large-$N$ gauge theory where by `non-local interaction' we mean the all-to-all coupling of color degrees of freedom. Recently it has been pointed out that nontrivial features of the confinement/deconfinement transition are understood as consequences of the coexistence of the confined and deconfined phases on the group manifold describing the color degrees of freedom. While these novel features of the confinement/deconfinement transition are analogous to the two-phase coexistence at the first order transition of more familiar local theories, various differences such as the partial breaking of the symmetry group appear due to the non-local interaction. In this article, we show that similar phase transitions with partially broken symmetry can exist in various examples from QFT and string theory. Our examples include the deconfinement and chiral transition in QCD, Gross-Witten-Wadia transition in two-dimensional lattice gauge theory, Douglas-Kazakov transition in two-dimensional gauge theory on sphere, and black hole/black string transition.
description: 34 pages, 9 figures
Particle Theory at Chicago in Late Sixties and p-Adic Strings
Creators: name: Frampton, Paul H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: As a contribution requested by the editors of a Memorial Volume for Peter G.O. Freund (1936-2018), we recall the lively particle theory group at the Enrico Fermi Institute of the University of Chicago in the late sixties, of which Peter was a memorable member. We also discuss a period some twenty years later when our and Peter's research overlapped on the topic of p-adic strings.
description: 11 pages LaTeX. Submitted to a special issue of Journal of Physics A entitled {\it A passion for theoretical physics: in memory of Peter G.O. Freund}. Edited by J. Harvey, E. Martinec and R. Nepomechie. Minor changes in text and typos corrected
Chiral Dirac fermions on the lattice using Geometric Discretisation
Creators: name: de Beauce, Vivien
name: Sen, Samik
name: Sexton, James C.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: A new approach to the problem of doubling is presented with the Dirac-Kahler (DK) theory as a starting point and using Geometric Discretisation providing us with a new way of extracting the Dirac field in the discrete setting of a hyper-cubic complex.
description: Lattice2003(Chiral), 3 pages
Limited Angle Tomography reconstruction for non-standard MBI system by means of parallel-hole and pinhole optics
Creators: name: Poma, G. E.
name: Garibaldi, F.
name: Giuliani, F.
name: Insero, T.
name: Lucentini, M.
name: Marcucci, A.
name: Musico, P.
name: Nuyts, J.
name: Santavenere, F.
name: Schramm, G.
name: Sutera, C.
name: Cisbani, E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The purpose of the present work is the study of reconstruction properties of a new Molecular Breast Imaging (MBI) device for the early diagnosis of breast cancer, in Limited Angle Tomography (LAT), by using two asymmetric detector heads with different collimators. The detectors face each other in anti-parallel viewing direction and, mild-compressing the breast phantom, they are able to reconstruct the inner tumour of the phantoms with only a limited number of projections using a dedicated maximum-likelihood expectation maximization (ML-EM) algorithm. Phantoms, MBI system, as well as Monte Carlo simulator using Geant 4 Application for Tomographic Emission (GATE) software, are briefly described. MBI system's model has been implemented in IDL (Interactive Data Visualization), in order to evaluate the best LAT configuration of the system and its reconstruction ability by varying tumour's size, depth and uptake. LAT setup in real and simulated configurations, as well as the ML-EM method and the preliminary reconstruction results, are discussed.
description: 10 pages, 10 figures, proceeding conference
S-functions, reductions and hodograph solutions of the r-th dispersionless modified KP and Dym hierarchies
Creators: name: Manas, Manuel
Publisher: name: arXiv
Year: 2004
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We introduce an S-function formulation for the recently found r-th dispersionless modified KP and r-th dispersionless Dym hierarchies, giving also a connection of these $S$-functions with the Orlov functions of the hierarchies. Then, we discuss a reduction scheme for the hierarchies that together with the $S$-function formulation leads to hodograph systems for the associated solutions. We consider also the connection of these reductions with those of the dispersionless KP hierarchy and with hydrodynamic type systems. In particular, for the 1-component and 2-component reduction we derive, for both hierarchies, ample sets of examples of explicit solutions.
description: 35 pages, uses AMS-Latex, Hyperref, Geometry, Array and Babel packages