cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Women in shunga: Questions of Objectification and Equality
Creators: name: Boyd, Louise
Publisher: name: The Polish Journal of Aesthetics
Year: 2019

description: The objectification of women in art and pornography is often seen as harmful. However, Martha Nussbaum’s articulation of seven types of objectification shows how it can be benign or positive depending on the context. This paper utilizes Nussbaum’s ideas to examine the objectification of women depicted in shunga, sexually explicit art created in 17th-19th century Japan, and how it differs from European art of the same period. It also explores related issues of equality, sexuality, and agency.
Keywords: Shunga, Sex, Art, Feminism, Objectification
Preface: Multiscale Computational Analysis of Complex Materials
Creators: name: Mishnaevsky Jr., Leon
name: Linder, Christian
name: Sun, WaiChing
Publisher: name: Columbia University
Year: 2018
Subjects: Materials science
Materials--Mechanical properties
Multiscale modeling

description: Complex materials play an essential role in many applications, ranging from turbine blades, car chassis, computer and cell phone cases, battery systems, stretchable and wearable electronics, to biomedical applications. Those materials often operate and must maintain their high performance in harsh environments. The advancement of computational methods at multiple scales opens new possibilities for the design of such complex materials and the optimization of their intrinsic properties under extreme events. The bridging of different length and time scales though still represents an area of active research with many unresolved challenges. For example, material degradation is considered as a typical multiscale process, controlled by nanoscale defects, highly affecting the macroscopic material response. In order to discuss the methods of modelling of multiphysics aspects of complex materials behaviour, the International Symposium on Multiscale Computational Analysis of Complex Materials was organized at 29-31. August 2017, at the Technical University of Denmark/DTU, Copenhagen. The Symposium Topics included Multiscale multiphysics modeling of materials, computational materials science, micromechanics of materials, scale bridging and homogenization, materials under extreme environments, hierarchical, biological and natural materials, nanomaterials. Several selected papers from this symposium are presented in this issue of the journal.
Gerold Walser, Die römischen Straßen in der Schweiz. 1. Teil: Die Meilensteine
Creators: name: Alföldy, Géza
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Gerold Walser, Die römischen Straßen in der Schweiz. 1. Teil: Die Meilensteine. = Itinera Romana. Beiträge zur Straßengeschichte des Römischen Reiches, Heft 1. Kümmerly & Frey Geographischer Verlag, Bern 1967. 108 Seiten.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Alfred Neumann, Lampen und andere Beleuchtungsgeräte aus Vindobona
Creators: name: Vegas, Mercedes
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Alfred Neumann, Lampen und andere Beleuchtungsgeräte aus Vindobona. Der Römische Limes in Osterreich, Heft 22. Wien 1967. 28 Seiten und 25 Tafeln.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Rezension zu: A. N. Zadoks-Josephus Jitta, W. J. T. Peters, W. A. van Es, Roman Bronze Statuettes from the Netherlands I.
Creators: name: Künzl, Ernst
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: A. N. Zadoks-Josephus Jitta, W. J. T. Peters, W. A. van Es, Roman Bronze Statuettes from the Netherlands I. Scripta Archaeologica Groningana I. J. B. Wolters, Groningen 1967. 141 Seiten, 1 Farbtafel und 194 Abbildungen.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
FFLO or Majorana superfluids: The fate of fermionic cold atoms in spin-orbit coupled optical lattices
Creators: name: Qu, Chunlei
name: Gong, Ming
name: Zhang, Chuanwei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The recent experimental realization of spin-orbit coupling (SOC) for ultra-cold atoms opens a completely new avenue for exploring new quantum matter. In experiments, the SOC is implemented simultaneously with a Zeeman field. Such spin-orbit coupled Fermi gases are predicted to support Majorana fermions with non-Abelian exchange statistics in one dimension (1D). However, as shown in recent theory and experiments for 1D spin-imbalanced Fermi gases, the Zeeman field can lead to the long-sought Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superfluids with non-zero momentum Cooper pairings, in contrast to the zero momentum pairing in Majorana superfluids. Therefore a natural question to ask is which phase, FFLO or Majorana superfluids, will survive in spin-orbit coupled Fermi gases in the presence of a large Zeeman field. In this paper, we address this question by studying the mean field quantum phases of 1D (quasi-1D) spin-orbit coupled fermionic cold atom optical lattices.
description: 7 pages, 7 figures, results for quasi-1D lattices were added
Maria Schindler, Die 'schwarze sigillata' des Magdalensberges
Creators: name: Vegas, Mercedes
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Renzension zu: Maria Schindler, Die ’schwarze sigillata' des Magdalensberges. Kärntner Museumsschriften XLIII. Klagenfurt 1967. 72 Seiten, 8 Tafeln.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Open-source support toward validating and falsifying discrete mechanics models using synthetic granular materials—Part I: Experimental tests with particles manufactured by a 3D printer
Creators: name: Gupta, Ritesh
name: Salager, Simon
name: Wang, Kun
name: Sun, WaiChing
Publisher: name: Columbia University
Year: 2018
Subjects: Three-dimensional printing
Granular materials--Mechanical properties
Particles--Computer simulation
Materials science

description: This article presents a new test prototype that leverages the 3D printing technique to create artificial particle assembles to provide auxiliary evidences that supports the validation procedure. The prototype test first extracts particle shape features from micro-CT images of a real sand grain and replicates the geometrical features of sand grain using a 3D printer. The quantitative measurements of the particle shape descriptors reveal that the synthetic particles inherit some attributes such as aspect ratio and sparseness of the real materials while exhibiting marked differences for sphericity and convexity. While it is not sufficient to consider the printed particle assembles a replica of the real sand, the repeatable manufacture process provides convention tools to generate additional data that supports the validation procedure for particulate simulations. Oedometric compression tests are conducted on a specimen composed of the printed particles of identical size and shape to create benchmark cases for calibrating and validating discrete element models. Results from digital image correlation on the synthetic sand assemblies reveal that the fracture and fragmentation of the synthetic particles are minor, which in return makes particle position tracking possible. As our prototype test and research data are designed to be open source, the dataset and the prototype work will open doors for modelers to design further controlled experiments using synthetic granular materials such that the individual influence of each morphological feature of granular assemblies (e.g., shape and size distribution, void ratio, fabric orientation) can be individually tested without being simultaneously affected by other variables.
Minimal Model for Stem-Cell Differentiation
Creators: name: Goto, Yusuke
name: Kaneko, Kunihiko
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: To explain the differentiation of stem cells in terms of dynamical systems theory, models of interacting cells with intracellular protein expression dynamics are analyzed and simulated. Simulations were carried out for all possible protein expression networks consisting of two genes under cell--cell interactions mediated by the diffusion of a protein. Networks that show cell differentiation are extracted and two forms of symmetric differentiation based on Turing's mechanism and asymmetric differentiation are identified. In the latter network, the intracellular protein levels show oscillatory dynamics at a single-cell level, while cell-to-cell synchronicity of the oscillation is lost with an increase in the number of cells. Differentiation to a fixed-point type behavior follows with a further increase in the number of cells. The cell type with oscillatory dynamics corresponds to a stem cell that can both proliferate and differentiate, while the latter fixed-point type only proliferates. This differentiation is analyzed as a saddle-node bifurcation on an invariant circle, while the number ratio of each cell type is shown to be robust against perturbations due to self-consistent determination of the effective bifurcation parameter as a result of the cell--cell interaction. Complex cell differentiation is designed by combing these simple two-gene networks. The generality of the present differentiation mechanism, as well as its biological relevance, is discussed.
Max Wegner, Die Musensarkophage
Creators: name: Gabelmann, Hanns
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Max Wegner, Die Musensarkophage. Die antiken Sarkophagreliefs V 3. Gebr. Mann, Berlin 1966. 171 Seiten, 151 Tafeln, 5 Beilagen.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Photon Aided and Inhibited Tunneling of Photons
Creators: name: Liu, Xuele
name: Agarwal, G. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In the light of the interest in the transport of single photons in arrays of waveguides, fiber couplers, photonic crystals, etc., we consider the quantum mechanical process of the tunneling of photons through evanescently or otherwise coupled structures. We specifically examine the issue of tunneling between two structures when one structure already contains few photons. We demonstrate the possibility of both photon aided and inhibited tunneling of photons. The Bosonic nature of photons enhances the tunneling probability. We also show how the multiphoton tunneling probability can be either enhanced or inhibited due to the presence of photons. We find similar results for the higher order tunneling. Finally, we show that the presence of a squeezed field changes the nature of tunneling considerably.
Backlog Monster! Or, The Virtue of Muddling Through
Creators: name: Schlottmann, Kevin W.
name: Hodges, David W.
Publisher: name: Columbia University
Year: 2021
Subjects: Information science
Library science
Digital libraries
Project management

description: There is something big lurking in your backlog, something that darkens your every work day. Maybe it’s remediation you’ve been putting off for years, or unfinished business from a big migration. Nothing depends on taming the monster, but life would be easier if you did. In our case it was barcodes—tens of thousands of off-site barcodes in the ILS but unavailable to the Aeon requesting system. Every request fulfillment necessitated a tedious manual lookup. Merging the data by hand would have taken untold months of staff hours, and with no common identifiers across systems an automated solution seemed out of reach. By piecing together and adapting tooling from other efforts (Python, Google Sheets, regex), we struck a productive balance between automation and manual work and, while working remotely during COVID-19, added 25K barcodes to our most in-demand collections. The presentation outlines the solution we landed on and makes a limited case for an ad hoc, “bricoleur” approach that eschews sustainability in favor of near-term effectiveness and progressive learning. You may never use your one-off tools again, but you will carry forward something for the next project, and further lower the barrier to taming the next backlog monster.
Engaging Remote Students - Don't worry about their cameras!
Creators: name: Marquart, Matthea S.
Publisher: name: Columbia University
Year: 2021
Subjects: Social work education
Web-based instruction
Distance education students
Classroom environment

description: These are the slides from a webinar for SUNY FACT2 (Faculty Advisory Council on Teaching & Technology), on Friday, March 26, 2021. https://sunycpd.eventsair.com/QuickEventWebsitePortal/fact-ers/site Abstract: How do you know whether your students are engaged in learning during your synchronous online classes? Can you tell from their cameras? When your students leave their cameras off, does this make it difficult to feel connected to them? Do you wonder why your students leave their cameras off? In this workshop, we’ll examine why students may be unwilling or unable to use a web camera during your classes and discuss alternative ways of maintaining active engagement with your students.
A question of personalities: evolution of viscous and wind-driven protoplanetary discs in the presence of dead zones
Creators: name: Tong, Simin
name: Alexander, Richard
name: Rosotti, Giovanni
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Whether the angular momentum of protoplanetary discs is redistributed by viscosity or extracted by magnetised winds is a long-standing question. Demographic indicators, such as gas disc sizes and stellar accretion rates, have been proposed as ways of distinguishing between these two mechanisms. In this paper, we implement one-dimensional gas simulations to study the evolution of "hybrid" protoplanetary discs simultaneously driven by viscosity and magnetised winds, with dead zones present. We explore how the variations of disc properties, including initial disc sizes, dead zone sizes and angular momentum transport efficiency, affect stellar accretion rates, disc surface density profiles, disc sizes, disc lifetimes, and cumulative mass loss by different processes. Our models show that the expansion of the gas disc size can be sustained when the majority of angular momentum is removed by the magnetised wind for individual protoplanetary discs. However, when we can only observe discs via demographic screenshots, the variation of disc sizes with time is possibly diminished by the disc "personalities", by which we mean the variations of initial disc properties among different discs. Our "hybrid" models re-assess association of the two demographic indicators with mechanisms responsible for angular momentum transport and suggest additional diagnostics are required to assist the differentiation.
description: 23 pages, 17 figures. Accepted for publication in MNRAS
Klaus P. Stähler, Grab und Psyche des Patroklos
Creators: name: Wortmann, D.
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Klaus P. Stähler, Grab und Psyche des Patroklos (Münster 1967 - Selbstverlag). 76 Seiten mit 13 Abbildungen, 4 Tafeln mit 6 Abbildungen. (Zu beziehen durch Wasmuth KG., Berlin und Dr. R. Habelt, Bonn).
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Point-contact spectroscopy of the phononic mechanism of superconductivity in YB6
Creators: name: Szabo, P.
name: Girovsky, J.
name: Pribulova, Z.
name: Kacmarcik, J.
name: Mori, T.
name: Samuely, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Lortz et al. [Phys. Rev. B 73, 024512 (2006)] have utilized specific heat and resistivity measurements as "thermal spectroscopies" to deconvolve the spectrum of the electron-phonon interaction in YB$_6$ assuming a major role of the low frequency phonon mode in mediating superconductivity. Here, we present direct point-contact spectroscopy studies of the superconducting interaction in this system. As a result the normalized superconducting gap reveals a strong coupling with $2Δ/k_BT_c = 4$ and moreover the spectra contain nonlinearities typical of the electron-phonon interaction at energies around 8 meV. The in-magnetic-field measurements evidence that the phonon features found in the second derivative of the current-voltage characteristics are due to the energy dependence of the superconducting energy gap as their energy position shrinks equally as the gap is closing. This is a direct proof that the superconducting coupling in the system is due to the low energy Einstein-like phonon mode associated with the yttrium ion vibrations in a perfect agreement with determinations from bulk measurements.
description: 7 pages, 5 figures
Fritz Schachermeyr, Ägäis und Orient
Creators: name: Koeppel, Gerhard
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Fritz Schachermeyr, Ägäis und Orient. Die Überseeischen Kulturbeziehungen von Kreta und Mykenai mit Ägypten, der Levante und Kleinasien unter besonderer Berücksichtigung des 2. Jahrtausends v. Chr. Wien 1967. 82 Seiten, 63 Tafeln mit 233 Abbildungen.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Hans Aschemeyer, Die Gräber der jüngeren Bronzezeit im westlichen Westfalen. Bodenaltertümer Westfalens IX
Creators: name: Jacob-Friesen, Gernot
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Hans Aschemeyer, Die Gräber der jüngeren Bronzezeit im westlichen Westfalen
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Gernot Jacob-Friesen, Bronzezeitliche Lanzenspitzen Norddeutschlands und Skandinaviens
Creators: name: Ankel, Cornelius
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Gernot Jacob-Friesen, Bronzezeitliche Lanzenspitzen Norddeutschlands und Skandinaviens. Veröffentlichungen der urgeschichtlichen Sammlungen des Landesmuseums zu Hannover, Band 17 (Text- und Tafelband). Hildesheim 1967. XI und 422 Seiten, 187 Tafeln, 16 Karten und 2 Tabellen.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Magnetostructural transition, metamagnetism, and magnetic phase coexistence in Co10Ge3O16
Creators: name: Barton, Phillip T.
name: Seshadri, Ram
name: Llobet, Anna
name: Suchomel, Matthew R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Co10Ge3O16 crystallizes in an intergrowth structure featuring alternating layers of spinel and rock salt. Variable-temperature powder synchrotron X-ray and neutron diffraction, magnetometry, and heat capacity experiments reveal a magnetostructural transition at T_N = 203 K. This rhombohedral-to-monoclinic transition involves a slight elongation of the CoO6 octahedra along the apical axis. Below T_N, the application of a large magnetic field causes a reorientation of the Co^2+ Ising spins. This metamagnetic transition is first-order as evidenced by a latent heat observed in temperature-dependent measurements. This transition is initially seen at T = 180 K as a broad upturn in the M-H near H_C = 3.9 T. The upturn sharpens into a kink at T = 120 K and a "butterfly" shape emerges, with the transition causing hysteresis at high fields while linear and reversible behavior persists at low fields. H_C decreases as temperature is lowered and the loops at positive and negative fields merge beneath T = 20 K. The antiferromagnetism is described by k_M = (00 1/2) and below T = 20 K a small uncompensated component with k_M = (000) spontaneously emerges. Despite the Curie-Weiss analysis and ionic radius indicating the Co2+ is in its high-spin state, the low-temperature M-H trends toward saturation at M_S = 1.0 uB/Co. We conclude that the field-induced state is a ferrimagnet, rather than a S = 1/2 ferromagnet. The unusual H-T phase diagram is discussed with reference to other metamagnets and Co(II) systems.
Gisela Sudholz, Die ältere Bronzezeit zwischen Niederrhein und Mittelweser
Creators: name: Jacob-Friesen, Gernot
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Gisela Sudholz, Die ältere Bronzezeit zwischen Niederrhein und Mittelweser. Münsterische Beiträge zur Vorgeschichtsforschung Bd. 1. Verlag A. Lax, Hildesheim 1964. 128 Seiten, 46 Tafeln u. 14 Karten.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
title: SPEDENER, Jules Henri
Creators: name: Sherley De Deurwaerder
name: Zeiss-Zippel, Tina
Publisher: name: Melusina Press
Year: 2022
Subjects: Dirigent, Mann, Hauptberuflich, Cellist, Musikpädagoge, Schulleiter

description: Luxemburger Musikerlexikon - Band 1
Karl Heinz Brandt, Studien über steinerne Äxte und Beile der Jüngeren Steinzeit und der Stein-Kupferzeit Nordwestdeutschlands
Creators: name: Bosinski, Gerhard
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Karl Heinz Brandt, Studien über steinerne Äxte und Beile der Jüngeren Steinzeit und der Stein-Kupferzeit Nordwestdeutschlands. Münstersche Beiträge zur Vorgeschichtsforschung, Band 2. August Lax Verlagsbuchhandlung, Hildesheim 1967. X u. 210 Seiten, 43 Tafeln, 34 Karten, 1 Falttafel, 3 Textabbildungen.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
A theoretical investigation of surface phenomena
Creators: name: Ho, Wilson
Publisher: name: California Institute of Technology
Year: 1975
Subjects: Chemistry

description: Using the Linear Combination of Atomic Orbitals (LCAO) formalism and
the tight-binding approximation, we have investigated three separate types
of surface phenomena via the Green's function method and the phase shift
technique. We obtain the shift in the energy levels due to the following:
(l) creation of the surface, (2) surface reconstruction, and (3) the adsorption of a single atom. In the first two parts, we study the (001) face
of a two-band crystal with the CsC1 structure, simulating the surface
properties of semiconductors or insulators. In the third part, we study
the interaction of a single atom with the (001) surface of a bcc metal.
The results obtained are contrasted with those obtained from a one-band
calculation for the (001) surface of a simple cubic crystal. We find that
the second unoccupied band is of utmost importance in understanding these
surface phenomena.
Forecast Analysis of Astrophysical Stochastic Gravitational Wave Background beyond general relativity: A Case Study on Brans-Dicke Gravity
Creators: name: Chen, Ran
name: Li, Zhao
name: Li, Yin-Jie
name: Wang, Yi-Ying
name: Niu, Rui
name: Zhao, Wen
name: Fan, Yi-Zhong
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Scalar-tensor gravity, exemplified by Brans-Dicke (BD) gravity, introduces additional scalar polarization modes that contribute scalar radiation alongside tensor modes. We conduct a comprehensive analysis of how gravitational wave generation and propagation effects under Brans-Dicke gravity are encoded into the astrophysical stochastic gravitational wave background (AGWB). We perform end-to-end analyses of realistic populations of simulated coalescing binary systems to generate AGWB mock data with third-generation gravitational wave detectors and conducted a complete Bayesian analysis for the first time. We find the uncertainties in the population properties of binary black holes (BBH) significantly affect the ability to constrain BD gravity. Furthermore, we explore the detectability of potential scalar backgrounds that originates from binary neutron star (BNS) and neutron-star-black-hole (NSBH) mergers, with NSBH systems expected to modify the spectral index of the scalar background and introduce oscillatory behavior. We show that the observations of the AGWB enable the separation of mixed tensor and scalar polarization modes with comparable sensitivity to each mode. However, the scalar background is expected to remain substantially weaker than the tensor background, even in scenarios where BD gravity exhibits significant deviations from general relativity (GR), resulting only upper limits can be placed on the scalar background. We conclude that for ambiguous populations, employing waveform matching with individual sources provides a more robust approach to constrain BD gravity.
description: 26 pages, 8 figures, and 3 tables. Published in JCAP
Lepton-number violating four-body decays of heavy mesons
Creators: name: Yuan, Han
name: Wang, Tianhong
name: Wang, Guo-Li
name: Ju, Wan-Li
name: Zhang, Jin-Mei
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Neutrinoless hadron Lepton Number Violating (LNV) decays can be induced by virtual Majorana neutrino, which in turn indubitably show the Majorana nature of neutrinos. Many three-body LNV processes and Lepton Flavour Violating (LFV) processes have been studied extensively in theory and by experiment. As a supplement, we here study 75 four-body LNV (LFV) processes from heavy pseudoscalar $B$ and $D$ decays. Most of these processes have not been studied in theory and searched for in experiment, while they may have sizable decay rates. Since the four-body decay modes have the same vertexes and mixing parameters with three-body cases, so their branching fractions are comparable with the corresponding three-body decays. We calculate their decay widths and branching fractions with current bounds on heavy Majorana neutrino mixing parameters, and estimate some channels' reconstruction events using the current experimental data from Belle.
description: 20 pages, 7 figures
The Role of Network and Identity in the Diffusion of Hashtags
Creators: name: Ananthasubramaniam, Aparna
name: Zhu, Yufei 'Louise'
name: Jurgens, David
name: Romero, Daniel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Social and Information Networks (cs.SI)
subject: Computation and Language (cs.CL)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The diffusion of culture online is theorized to be influenced by many interacting social factors (e.g., network and identity). However, most existing computational cascade models consider just a single factor (e.g., network or identity). This work offers a new framework for teasing apart the mechanisms underlying hashtag cascades. We curate a new dataset of 1,337 hashtags representing cultural innovation online, develop a 10-factor evaluation framework for comparing empirical and simulated cascades, and show that a combined network+identity model better simulates hashtag cascades than network- or identity-only counterfactuals. We also explore heterogeneity in performance: While a combined network+identity model best predicts the popularity of cascades, a network-only model best predicts cascade growth and an identity-only model best predicts adopter composition. The network+identity model has the highest comparative advantage among hashtags used for expressing racial or regional identity and talking about sports or news. In fact, we are able to predict what combination of network and/or identity best models each hashtag and use this to further improve performance. Our results show the utility of models incorporating the interactions of network, identity, and other social factors in the diffusion of hashtags in social media.
Karl Brandt, Neolithische Siedlungsplätze im Stadtgebiet von Bochum
Creators: name: Ankel, Cornelius
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Karl Brandt, Neolithische Siedlungsplätze im Stadtgebiet von Bochum. Quellenschriften zur westdeutschen Vor- und Frühgeschichte Band 8, Bonn 1967. 109 Seiten, 6 Textabbildungen und 60 Tafeln.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Coupling of nitrogen vacancy centers in nanodiamonds by means of phonons
Creators: name: Albrecht, Andreas
name: Retzker, Alex
name: Jelezko, Fedor
name: Plenio, Martin B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Realising controlled quantum dynamics via the magnetic interactions between colour centers in diamond remains a challenge despite recent demonstrations for nanometer separated pairs. Here we propose to use the intrinsic acoustical phonons in diamond as a data bus for accomplishing this task. We show that for nanodiamonds the electron-phonon coupling can take significant values that together with mode frequencies in the THz range, can serve as a resource for conditional gate operations. Based on these results we analyze how to use this phonon-induced interaction for constructing quantum gates among the electron-spin triplet ground states, introducing the phonon dependence via Raman transitions. Combined with decoupling pulses this offers the possibility for creating entangled states within nanodiamonds on the scale of several tens of nanometers, a promising prerequisite for quantum sensing applications.
description: 28 pages (incl. appendices), 6 figures
KICHIK BIZNES SUBYEKTLARINI TIJORAT BANKLARI TOMONIDAN KREDITLASHDAGI DOLZARB MASALALAR
Creators: name: Xojimatov, Xamidullo
Publisher: name: Zenodo
Year: 2024

description: Respublikamiz iqtisodiyotini yuqori sur’atlarda rivojlantirish omillaridan biri kichik biznes va tadbirkorlik faoliyatini taraqqiy etishini ta’minlashdir. Yurtimizda kichik biznes va tadbirkorlik faoliyatini to‘g‘ri yo‘lga qo‘yilishi va rivojlanishi, mahalliy xom-ashyo va qishloq xo‘jalik mahsulotlarini qayta ishlashni yanada rivojlantirish, O‘zbekiston Respublikasi ichki bozorini iste’mol tovarlari va chakana xizmatlar bilan to‘ldirish kabi muommolarni hal qilish, ularni milliy va xorijiy kredit liniyalari hisobidan moliyaviy ehtiyojlarini qondirish bugungi kunning dolzarb vazifalaridan hisoblanadi.
Proof nets and the call-by-value lambda-calculus
Creators: name: Accattoli, Beniamino
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: This paper gives a detailed account of the relationship between (a variant of) the call-by-value lambda calculus and linear logic proof nets. The presentation is carefully tuned in order to realize a strong bisimulation between the two systems: every single rewriting step on the calculus maps to a single step on the nets, and viceversa. In this way, we obtain an algebraic reformulation of proof nets. Moreover, we provide a simple correctness criterion for our proof nets, which employ boxes in an unusual way.
description: In Proceedings LSFA 2012, arXiv:1303.7136
Negotiating peace the same old way doesn’t work. Here’s what does.
Creators: name: Autesserre, Severine
Publisher: name: Columbia University
Year: 2021
Subjects: subject: Peace-building
subject: Peace--Study and teaching
subject: Peace--International cooperation
subject: Political science
subject: FOS: Political science

description: Over 20 years of research, these three things emerged as key to building a lasting peace.
Hermann Müller-Karpe, Handbuch der Vorgeschichte, Band 1, Altsteinzeit
Creators: name: Bosinski, Gerhard
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Hermann Müller-Karpe, Handbuch der Vorgeschichte, Band 1, Altsteinzeit. C. H. Beck’sche Verlagsbuchhandlung, München 1966. XI u. 389 Seiten, 274 Tafeln (dabei 3 Karten), 4 Textabbildungen.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Morphometric analysis in gamma-ray astronomy using Minkowski functionals - Source detection via structure quantification
Creators: name: Göring, D.
name: Klatt, M. A.
name: Stegmann, C.
name: Mecke, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Aims. H.E.S.S. observes an increasing number of large extended sources. A new technique based on the structure of the sky map is developed to account for these additional structures by comparing them with the common point source analysis. Methods. Minkowski functionals are powerful measures from integral geometry. They can be used to quantify the structure of the counts map, which is then compared with the expected structure of a pure Poisson background. Gamma-ray sources lead to significant deviations from the expected background structure. The standard likelihood ratio method is exclusively based on the number of excess counts and discards all further structure information of large extended sources. The morphometric data analysis incorporates this additional geometric information in an unbiased analysis, i.e., without the need of any prior knowledge about the source. Results. We have successfully applied our method to data of the H.E.S.S. experiment. The morphometric analysis presented here is dedicated to detecting faint extended sources.
description: Published version
A. T. Clason, Animal and Man in Holland’s Past
Creators: name: Reichstein, H.
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: A. T. Clason, Animal and Man in Holland’s Past. – Palaeohistorica Vol. XIII, 2 Bd. mit 247 u. 190 Seiten. J. B. Wolters, Groningen 1967.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Writing Centers Feel the Crunch
Creators: name: Makau, Lynn
name: Schonberg, Eliana
name: Mendelsohn, Susan E.
Publisher: name: Columbia University
Year: 2003
Subjects: Writing centers
Education, Higher

description: Writing centers are feeling the effects of budget reductions across higher education nationwide. Like other student services that don’t offer credits or produce revenue, writing centers are particularly vulnerable to budget cuts. Community colleges, four-year colleges, and universities across the country are asking writing centers to make hard choices–choices that will affect consultant hiring, pay, and benefits as well as hours of operation, services, technological resources, and administration.
Symmetries in Modal Logics
Creators: name: Areces, Carlos
name: Hoffmann, Guillaume
name: Orbe, Ezequiel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We generalize the notion of symmetries of propositional formulas in conjunctive normal form to modal formulas. Our framework uses the coinductive models and, hence, the results apply to a wide class of modal logics including, for example, hybrid logics. Our main result shows that the symmetries of a modal formula preserve entailment.
description: In Proceedings LSFA 2012, arXiv:1303.7136
Udelgard Körber-Grohne, Bestimmungsschlüssel für subfossile Juncus-Samen und Gramineen-Früchte
Creators: name: Knörzer, K. H.
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Udelgard Körber-Grohne, Bestimmungsschlüssel für subfossile Juncus-Samen und Gramineen-Früchte. Probleme der Küstenforschung im südlichen Nordseegebiet, Bd. 7 (hrsg. v. Werner Haarnagel). Schriftenreihe des Niedersächsischen Landesinstituts für Marschen- und Wurtenforschung in Wilhelmshaven. Hildesheim 1964. 47 Seiten mit 42 Abbildungen, 1 Tabelle und 21 Tafeln.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Training on the Cutting Edge
Creators: name: Dobbins, Zachary
name: Juel, Heidi
name: Mendelsohn, Susan E.
name: Rouland, Roger
name: Schonberg, Eliana
Publisher: name: Columbia University
Year: 2004
Subjects: Writing centers
Educational technology
Professional education

description: Writing center consultants are leading busier and busier lives. As writing centers become standard fixtures in schools and communities, consultants are expected to enact educational, legislative and corporate change. However, while the demands on us are increasing, so are the tools we have at our disposal. Today’s writing center consultant is presented with a smorgasbord of training alternatives both within our own centers and online. Tried and true training approaches are still with us–classes, workshops, staff meetings, role-playing, observations, and mentoring–but they are increasingly supplemented by these new possibilities.
Udelgard Körber-Grohne, Geobotanische Untersuchungen auf der Feddersen Wierde
Creators: name: Knörzer, Karl-Heinz
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Udelgard Körber-Grohne, Geobotanische Untersuchungen auf der Feddersen Wierde. Feddersen Wierde, Die Ergebnisse der Ausgrabungen der vorgeschichtlichen Wurt Feddersen Wierde bei Bremerhaven in den Jahren 1955 bis 1963, Bd. 1 (hrsg. v. Werner Haarnagel). Schriften der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts zu Frankfurt a. M. und des Niedersächsischen Landesinstituts fur Marschen- und Wurtenforschung in Wilhelmshaven. Franz Steiner Verlag Wiesbaden 1967. Text- u. Tafelband: 358 Seiten mit 87 Abbildungen, 50 Tabellen u. 84 Tafeln.
description: Bonner Jahrbücher, Bd. 168 (1968): Bonner Jahrbücher
Initial tensor construction and dependence of the tensor renormalization group on initial tensors
Creators: name: Nakayama, Katsumasa
name: Schneider, Manuel
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We propose a method to construct a tensor network representation of partition functions without singular value decompositions nor series expansions. The approach is demonstrated for one- and two-dimensional Ising models and we study the dependence of the tensor renormalization group (TRG) on the form of the initial tensors and their symmetries. We further introduce variants of several tensor renormalization algorithms. Our benchmarks reveal a significant dependence of various TRG algorithms on the choice of initial tensors and their symmetries. However, we show that the boundary TRG technique can eliminate the initial tensor dependence for all TRG methods. The numerical results of TRG calculations can thus be made significantly more robust with only a few changes in the code. Furthermore, we study a three-dimensional $\mathbb{Z}_2$ gauge theory without gauge-fixing and confirm the applicability of the initial tensor construction. Our method can straightforwardly be applied to systems with longer range and multi-site interactions, such as the next-nearest neighbor Ising model.
description: 23 pages, 28 figures, 2 tables
Massive spin-2 fields on black hole spacetimes: Instability of the Schwarzschild and Kerr solutions and bounds on the graviton mass
Creators: name: Brito, Richard
name: Cardoso, Vitor
name: Pani, Paolo
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Massive bosonic fields of arbitrary spin are predicted by general extensions of the Standard Model. It has been recently shown that there exists a family of bimetric theories of gravity - including massive gravity - which are free of Boulware-Deser ghosts at the nonlinear level. This opens up the possibility to describe consistently the dynamics of massive spin-2 particles in a gravitational field. Within this context, we develop the study of massive spin-2 fluctuations - including massive gravitons - around Schwarzschild and slowly-rotating Kerr black holes. Our work has two important outcomes. First, we show that the Schwarzschild geometry is linearly unstable for small tensor masses, against a spherically symmetric mode. Second, we provide solid evidence that the Kerr geometry is also generically unstable, both against the spherical mode and against long-lived superradiant modes. In the absence of nonlinear effects, the observation of spinning black holes bounds the graviton mass to be smaller than 5x10^{-23} eV.
description: 24 pages, 8 figures. v2: references added and discussion extended. v3: references added, matches published version
Perceptions of households on the adoption on solar energy and tax
Creators: name: Venter, Juanita
name: Eksteen, Conrad
Publisher: name: University of Pretoria
Year: 2024
Subjects: classificationCode: 480499
subject: Law in context not elsewhere classified

description: Climate change constitutes a significant challenge globally, affecting various aspects of society and the environment. With global temperatures rising by 1.1°C between 1901 and 2020, climate change encompasses more than just temperature increases; it includes rising sea levels and disruptions to weather patterns. Fossil fuel usage, a significant contributor to climate change, is prevalent globally, including in South Africa, providing 80% of electricity. Governments implemented policies, such as green taxes and incentives, to encourage renewable energy source adoption. South Africa, encountering electricity supply issues and volatile economic activity from power outages, delineated a vision for renewable energy adoption supported by strategies, such as the Integrated Resource Plan (IRP) and the Renewable Energy Independent Power Producer Procurement Programme (REIPPP). Despite progress, challenges persist, emphasised by apprehensions about the brief duration of incentives and restrictions on tax credits for solar energy systems. The study aimed to explore the renewable energy landscape while focusing on the effect of green taxes and incentives on adopting renewable energy sources, specifically solar.
This research aimed to investigate the effect of green taxes and tax incentives on renewable energy adoption in South Africa through a methodologically robust approach. Positivist and interpretivist perspectives were combined. The study used a mixed-methods design, employing quantitative and qualitative methodologies. Data collection involved online questionnaires and diverse sampling techniques to collect insights from South Africans. The study's cross-sectional time horizon allowed for examining attitudes towards renewable energy adoption, contributing valuable insights for policy decisions. With a systematic approach and ethical considerations, this research attempted to provide a comprehensive understanding while informing energy policy and sustainability initiatives in South Africa. The data was collected by employing a public survey through the use of a questionnaire as data collection method.
Despite the moderate positive association observed in the symmetric measures, the chi-square tests indicate that this association is statistically insignificant. This discrepancy implies that solar system owners tend to express a more significant interest in investing in renewable energy technologies; however, the data alone may not definitively rule out chance as a factor. The findings emphasise the complex interaction between policy interventions and technological adoption in the renewable energy sector. While South Africa has progressed in promoting renewable energy, sustained efforts are needed to overcome barriers and maximise the benefits of diverse energy sources.
Elementary Deduction Problem for Locally Stable Theories with Normal Forms
Creators: name: Ayala-Rincón, Mauricio
name: Fernández, Maribel
name: Nantes-Sobrinho, Daniele
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Computational Complexity (cs.CC)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: We present an algorithm to decide the intruder deduction problem (IDP) for a class of locally stable theories enriched with normal forms. Our result relies on a new and efficient algorithm to solve a restricted case of higher-order associative-commutative matching, obtained by combining the Distinct Occurrences of AC- matching algorithm and a standard algorithm to solve systems of linear Diophantine equations. A translation between natural deduction and sequent calculus allows us to use the same approach to decide the \emphelementary deduction problem for locally stable theories. As an application, we model the theory of blind signatures and derive an algorithm to decide IDP in this context, extending previous decidability results.
description: In Proceedings LSFA 2012, arXiv:1303.7136
Online collaborative clothing consumption = “business as usual”? A look at female practitioners of redistributed ownership
Creators: name: Joyner Armstrong, Cosette M.
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 500 Naturwissenschaften und Mathematik
subject: 600 Technik, Technologie
subject: 300 Sozialwissenschaften
subject: collaborative consumption
subject: sustainable consumption
subject: clothing
subject: online

description: The advent of collaborative consumption (CC) has brought a renewed sense of hope among sustainable consumption scholars. Current CC clothing platforms conjure some skepticism about the capacity to meaningfully boost sustainable consumption, as these platforms are often positioned similarly as fast fashion outlets The purpose of this study was to understand the extent to which the practice of online redistributed clothing ownership aligns with the fundamental arguments that implicate CC as a model for sustainable consumption, using practice theory as a framework for inquiry. These fundamental arguments include utilization of secondhand goods that reduces demand for new products, mitigating premature disposal, and self-organization and peer-peer interaction that facilitate the development of shared values and personal identity via sociality that, consequently, changes consumption behavior. Phone interviews were conducted with 24 female participants from age 18-40. Constant comparative technique was utilized to identify emergent themes, and then these themes were categorized into performances, knowledge, and meanings characterizing the practice of online redistributed ownership. Evidence in the study supports the conclusion that the current practice only loosely supports fundamental aspects of how CC facilitates sustainable consumption. Meaningful product longevity and a culture that values secondhand exchange is largely absent from the practice among young women who use these online platforms.