cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Competition alters predicted forest carbon cycle responses to nitrogen availability and elevated CO2: simulations using an explicitly competitive, game-theoretic vegetation demographic model
Creators: name: Weng, Ensheng
name: Dybzinski, Ray
name: Farrior, Caroline E.
name: Pacala, Stephen W.
Publisher: name: Columbia University
Year: 2019
Subjects: Biogeochemistry
Carbon cycle (Biogeochemistry)
Forest biomass
Plants--Effect of carbon dioxide on
Plants--Effect of nitrogen on
Vegetation and climate

description: Competition is a major driver of carbon allocation to different plant tissues (e.g., wood, leaves, fine roots), and allocation, in turn, shapes vegetation structure. To improve their modeling of the terrestrial carbon cycle, many Earth system models now incorporate vegetation demographic models (VDMs) that explicitly simulate the processes of individual-based competition for light and soil resources. Here, in order to understand how these competition processes affect predictions of the terrestrial carbon cycle, we simulate forest responses to elevated atmospheric CO2 concentration [CO2] along a nitrogen availability gradient, using a VDM that allows us to compare fixed allocation strategies vs. competitively optimal allocation strategies. Our results show that competitive and fixed strategies predict opposite fractional allocation to fine roots and wood, though they predict similar changes in total net primary production (NPP) along the nitrogen gradient. The competitively optimal allocation strategy predicts decreasing fine root and increasing wood allocation with increasing nitrogen, whereas the fixed strategy predicts the opposite. Although simulated plant biomass at equilibrium increases with nitrogen due to increases in photosynthesis for both allocation strategies, the increase in biomass with nitrogen is much steeper for competitively optimal allocation due to its increased allocation to wood. The qualitatively opposite fractional allocation to fine roots and wood of the two strategies also impacts the effects of elevated [CO2] on plant biomass. Whereas the fixed allocation strategy predicts an increase in plant biomass under elevated [CO2] that is approximately independent of nitrogen availability, competition leads to higher plant biomass response to elevated [CO2] with increasing nitrogen availability. Our results indicate that the VDMs that explicitly include the effects of competition for light and soil resources on allocation may generate significantly different ecosystem-level predictions of carbon storage than those that use fixed strategies.
Atomistic Mechanism of the Nucleation of Methylammonium Lead Iodide Perovskite from Solution
Creators: name: Ahlawat, Paramvir
name: Piaggi, Pablo
name: Graetzel, Michael
name: Parrinello, Michele
name: Rothlisberger, Ursula
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the ongoing intense quest to increase the photoconversion efficiencies of lead halide perovskites, it has become evident that optimizing the morphology of the material is essential to achieve high peformance. Despite the fact that nucleation plays a key role in controlling the crystal morphology, very little is known about the nucleation and crystal growth processes. Here, we perform metadynamics simulations of nucleation of methylammonium lead triiodide (MAPI) in order to unravel the atomistic details of perovskite crystallization from a $γ$-butyrolactone solution. The metadynamics trajectories show that the nucleation process takes place in several stages. Initially, dense amorphous clusters mainly consisting of lead and iodide appear from the homogeneous solution. These clusters evolve into lead iodide (PbI$_{2}$) like structures. Subsequently, methylammonium (MA$^{+}$) ions diffuse into this PbI$_{2}$-like aggregates triggering the transformation into a perovskite crystal through a solid-solid transformation. Demonstrating the crucial role of the monovalent cations in crystallization, our simulations provide key insights into the evolution of the perovskite microstructure which is essential to make high-quality perovskite based solar cells and optoelectronics.
Newly discovered Ca II absorbers in the early universe: statistics, element abundances and dust
Creators: name: Fang, Hannah
name: Xia, Iona
name: Ge, Jian
name: Willis, Kevin
name: Zhao, Yinan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We report discoveries of 165 new quasar Ca II absorbers from the Sloan Digital Sky Survey (SDSS) Data Release 7 and 12. Our Ca II rest frame equivalent width distribution supports the weak and strong subpopulations, split at ${W}^{\lambda3934}_{0}=0.7$Å. Comparison of both populations' dust depletion shows clear consistency for weak absorber association with halo-type gas in the Milky Way (MW) while strong absorbers have environments consistent with halo and disc-type gas. We probed our high redshift Ca II absorbers for 2175Å dust bumps, discovering 12 2175Å dust absorbers (2DAs). This clearly shows that some Ca II absorbers follow the Large Magellanic Cloud (LMC) extinction law rather than the Small Magellanic Cloud extinction law. About 33% of our strong Ca II absorbers exhibit the 2175Å dust bump while only 6% of weak Ca II absorbers show this bump. 2DA detection further supports the theory that strong Ca II absorbers are associated with disk components and are dustier than the weak population. Comparing average Ca II absorber dust depletion patterns to that of Damped Lyα Absorbers (DLAs), Mg II absorbers, and 2DAs shows that Ca II absorbers generally have environments with more dust than DLAs and Mg II absorbers, but less dust than 2DAs. Comparing 2175Å dust bump strengths from different samples and also the MW and LMC, the bump strength appears to grow stronger as the redshift decreases, indicating dust growth and the global chemical enrichment of galaxies in the universe over time.
description: 17 pages, 24 figures, 5 tables; Acccepted for publication in the Monthly Notices of the Royal Astronomical Society (MNRAS)
Classical $r$-matrix like approach to Frobenius manifolds, WDVV equations and flat metrics
Creators: name: Szablikowski, Blazej M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 53D45, 37K10

description: A general scheme for construction of flat pencils of contravariant metrics and Frobenius manifolds as well as related solutions to WDVV associativity equations is formulated. The advantage is taken from the Rota-Baxter identity and some relation being counterpart of the modified Yang-Baxter identity from the classical $r$-matrix formalism. The scheme for the construction of Frobenius manifolds is illustrated on the algebras of formal Laurent series and meromorphic functions on Riemann sphere.
description: article, 46 pages, v3: small revision, v2: preliminary settings in sections 4 and 5 are clarified and corrected, the rest is accordingly modified
Georg Schweiger (1613 — 1690) und sein Neptunbrunnen für Nürnberg
Creators: name: Weihrauch, Hans R.
Publisher: name: Anzeiger des Germanischen Nationalmuseums
Year: 2017

description: Anzeiger des Germanischen Nationalmuseums, 1940-1953: Anzeiger des Germanischen Nationalmuseums
title: Gesundheitliche Risiken durch hohe Gehalte an 3-MCPD- und Glycidyl-Fettsäureestern in bestimmten Lebensmitteln möglich: Aktualisierte Stellungnahme Nr. 005/2022 des BfR vom 26. Januar 2022
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2022
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2022, no. 005
Escaping local minima with derivative-free methods: a numerical investigation
Creators: name: Cartis, Coralia
name: Roberts, Lindon
name: Sheridan-Methven, Oliver
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We apply a state-of-the-art, local derivative-free solver, Py-BOBYQA, to global optimization problems, and propose an algorithmic improvement that is beneficial in this context. Our numerical findings are illustrated on a commonly-used but small-scale test set of global optimization problems and associated noisy variants, and on hyperparameter tuning for the machine learning test set MNIST. As Py-BOBYQA is a model-based trust-region method, we compare mostly (but not exclusively) with other global optimization methods for which (global) models are important, such as Bayesian optimization and response surface methods; we also consider state-of-the-art representative deterministic and stochastic codes, such as DIRECT and CMA-ES. As a heuristic for escaping local minima, we find numerically that Py-BOBYQA is competitive with global optimization solvers for all accuracy/budget regimes, in both smooth and noisy settings. In particular, Py-BOBYQA variants are best performing for smooth and multiplicative noise problems in high-accuracy regimes. As a by-product, some preliminary conclusions can be drawn on the relative performance of the global solvers we have tested with default settings.
The VLT-FLAMES Tarantula Survey: Observational evidence for two distinct populations of massive runaway stars in 30 Doradus
Creators: name: Sana, H.
name: Ramírez-Agudelo, O. H.
name: Hénault-Brunet, V.
name: Mahy, L.
name: Almeida, L. A.
name: de Koter, A.
name: Bestenlehner, J. M.
name: Evans, C. J.
name: Langer, N.
name: Schneider, F. R. N.
name: Crowther, P. A.
name: de Mink, S. E.
name: Herrero, A.
name: Lennon, D. J.
name: Gieles, M.
name: Apellániz, J. Maíz
name: Renzo, M.
name: Sabbi, E.
name: van Loon, J. Th.
name: Vink, J. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Two main scenarios have been proposed for origin of massive runaway stars -- dynamical ejection or release from a binary at the first core collapse -- but their relative contribution remains debated. Using two large spectroscopic campaigns towards massive stars in 30 Doradus, we aim to provide observational constraints on the properties of the O-type runaway population in the most massive active star-forming region in the Local group. We use RV measurements of the O-type star populations in 30 Doradus obtained by the VLT-FLAMES Tarantula Survey and the Tarantula Massive Binary Monitoring to identify single and binary O-type runaways. We discuss their rotational properties and qualitatively compare observations with expectations of ejection scenarios. We identify 23 single and one binary O-type runaway objects, most of them outside the main star-forming regions in 30 Doradus. We find an overabundance of rapid rotators (vsini > 200km/s) among the runaway population, providing an explanation of the overabundance of rapidly rotating stars in the 30 Doradus field. Considerations of the projected rotation rates and runaway line-of-sight (los) velocities reveal a conspicuous absence of rapidly rotating (vsini > 210k/ms), fast moving (v_{los} > 60km/s) runaways, and suggest the presence of two different populations of runaway stars: a population of rapidly-spinning but slowly moving runaways and a population of fast moving but slowly rotating ones. These are detected with a ratio close to 2:1 in our sample. We argue that slowly moving but rapidly spinning runaways result from binary ejections, while rapidly moving but slowly spinning runaways could result from dynamical ejections. Given that detection biases will more strongly impact the slow-moving population, our results suggest that the binary evolution scenario dominates the current massive runaway population in 30 Doradus.
description: Accepted for publication in A&A Letters; 9 pages, 5 figures
Shape matters: Competing mechanisms of particle shape segregation
Creators: name: Hernández-Delfin, D.
name: Tunuguntla, D. R.
name: Weinhart, T.
name: Hidalgo, R. C.
name: Thornton, A. R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: It is well-known that granular mixtures that differ in size or shape segregate when sheared. In the past, two mechanisms have been proposed to describe this effect, and it is unclear if both exist. To settle this question, we consider a bidisperse mixture of spheroids of equal volume in a rotating drum, where the two mechanisms are predicted to act in opposite directions. We present the first evidence that there are two \emph{distinct} segregation mechanisms driven by relative \emph{over-stress}. Additionally, we showed that for non-spherical particles, these two mechanisms can act in different directions leading to a competition between the effects of the two. As a result, the segregation intensity varies non-monotonically as a function of $AR$, and at specific points, the segregation direction changes for both prolate and oblate spheroids, explaining the surprising segregation reversal previously reported. Consistent with previous results, we found that the kinetic mechanism is dominant for (almost) spherical particles. Furthermore, for moderate aspect ratios, the kinetic mechanism is responsible for the spherical particles segregation to the periphery of the drum, and the gravity mechanism plays only a minor role. Whereas, at the extreme values of $AR$, the gravity mechanism notably increases and overtakes its kinetic counterpart.
My quest to understand learning and teaching
Creators: name: Fanselow, John
Publisher: name: Columbia University
Year: 2019
Subjects: Education
Teaching
Teachers--Training of
English language--Study and teaching--Foreign speakers

description: In 2018, Alan Maley proposed a book about teacher education titled Developing expertise through experience to The British Council. His proposal was accepted and he immediately asked 20 teacher educators from around the world to write chapters. What was distinctive about his proposal was that he wanted the 20 he asked to do a chapter to answer the same series of questions: earliest experiences of language learning, greatest influence on our development, key ideas and publications that influenced us, etc. Alan developed his questions around his understanding of Prabhu's (1987) concept of "the sense of plausibility." Both Prabhu and Maley, who had worked together in India, believe that certainty prevents development while plausibility nourishes it because it makes it easier to shed routine.
Aligning a Majorana fermion's anapole moment with an external current through photon emission mediated by the fermion's generalized polarizabilities
Creators: name: Walter, Kiana
name: Hall, Kobi
name: Latimer, David C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The sole static electromagnetic property of a spin-$\frac{1}{2}$ Majorana fermion is its anapole moment. Though they cannot couple to single real photons, these particles can interact with electric currents through virtual photons. If a Majorana fermion is immersed in a background current, there is an energy difference between the spin states of the fermion; the higher energy state has its anapole moment antialigned with the current. In this paper, we address the ability of a system of initially unpolarized Majorana fermions to achieve some degree of polarization relative to a static background current. In considering processes that allow the Majorana fermion's spin to flip to the lower-energy state, we focus upon two irreversible processes: the spontaneous emission of two real photons and the emission of a single real photon emitted in virtual Compton scattering. Both of these processes involve coupling to photons via the fermion's polarizaibilities. We compute the spin-flip transition rates for these processes using a low-energy expansion of the Hamiltonian and construct a toy model to showcase how these rates depend upon the underlying parameters within a model. Applying these ideas to a thermal dark matter (DM) model, we find that when the DM thermally decouples from the Standard Model plasma in the early universe, two-photon emission is negligible but partial polarization for the DM medium can proceed via virtual Compton scattering if sufficient currents exist.
Survey on recent developments in semitoric systems
Creators: name: Alonso, Jaume
name: Hohloch, Sonja
Publisher: name: arXiv
Year: 2019
Subjects: subject: Dynamical Systems (math.DS)
subject: Symplectic Geometry (math.SG)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37J05, 37J15, 37J35, 53D20, 70H05, 70H06

description: Semitoric systems are a special class of four-dimensional completely integrable systems where one of the first integrals generates an $\mathbb{S}^1$-action. They were classified by Pelayo & Vu Ngoc in terms of five symplectic invariants about a decade ago. We give a survey over the recent progress which has been mostly focused on the explicit computation of the symplectic invariants for families of semitoric systems depending on several parameters and the generation of new examples with certain properties, such as a specific number of singularities of lowest rank.
description: 15 pages, 5 figures
Collective dynamics of the unbalanced three-level Dicke model
Creators: name: Fan, Jingtao
name: Jia, Suotang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a three-level Dicke model in V-configuration under both closed and open conditions. With independently tunable co- and counter-rotating coupling strength of the interaction Hamiltonian, this model is a generalization of the standard Dicke model that features multiple distinct parameter regimes. Based on a mean-field approach and third quantization analysis, it is found that the system exhibits rich quantum phase behaviours, including distinct superradiant fixed points, multi-phase coexistence and limit cycle oscillation. In particular, the cavity dissipation stabilizes a family of inverted spin coherent steady states, whose stability region can be enlarged or reduced by properly tuning the imbalance between the co- and counter-rotating interactions. This property provide a conceptually new scenario to prepare coherent atomic state with high fidelity.
description: 17 pages, 7 figures
Towards Concurrent Stateful Stream Processing on Multicore Processors (Technical Report)
Creators: name: Zhang, Shuhao
name: Wu, Yingjun
name: Zhang, Feng
name: He, Bingsheng
Publisher: name: arXiv
Year: 2019
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Recent data stream processing systems (DSPSs) can achieve excellent performance when processing large volumes of data under tight latency constraints. However, they sacrifice support for concurrent state access that eases the burden of developing stateful stream applications. Recently, some have proposed managing concurrent state access during stream processing by modeling state accesses as transactions. However, these are realized with locks involving serious contention overhead. Their coarse-grained processing paradigm further magnifies contention issues and tends to poorly utilize modern multicore architectures. This paper introduces TStream , a novel DSPS supporting efficient concurrent state access on multicore processors. Transactional semantics is employed like previous work, but scalability is greatly improved due to two novel designs: 1) dual-mode scheduling, which exposes more parallelism opportunities, 2) dynamic restructuring execution, which aggressively exploits the parallelism opportunities from dual-mode scheduling without centralized lock contentions. To validate our proposal, we evaluate TStream with a benchmark of four applications on a modern multicore machine. The experimental results show that 1) TStream achieves up to 4.8 times higher throughput with similar processing latency compared to the state-of-the-art and 2) unlike prior solutions, TStream is highly tolerant of varying application workloads such as key skewness and multi-partition state accesses.
Study the Forward-Backward Asymmetry of the Top Quark Production in the Randall-Sundrum Model with an Extension of Strong Interaction
Creators: name: Li, Cheng
name: Lu, Cai-Dian
name: Gao, Xiang-Dong
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The large forward-backward asymmetry of the top quark pair production measured by the hadron colliders shed light on new physics signals beyond the Standard Model. In the Randall-Sundrum model with an additional SU(3) group in the strong sector, we compare the total cross section and forward-backward asymmetry of the top quark pair production with the newest data obtained by the CDF and the D0 collaborations. Our numerical analysis shows that the parameter $c_q \gtrsim 0.5$, $c_t \sim -0.6\sim-0.8$, $\tanϕ\gtrsim 20$ or $\tanϕ\leq 1/20$ and the first excitation of axial gluon with a mass about $5 \thicksim 6 \mathrm{TeV}$ can accommodate this large anomaly without violating other experimental constraints.
description: 14 pages, 6 figures, accepted for publication in PRD
Nature and self: A pluralistic exploration on the influences behind pro-environmental motivations and intentions
Creators: name: OOI, WEE LIAM
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 520505
subject: Social psychology
classificationCode: 500304
subject: Environmental philosophy

description: In the Anthropocene, our relationship with nature is often dichotomized to prioritizing ourselves (humans) or nature. Through a pluralistic lens, my thesis sought to provide a more holistic understanding of the human-nature relationship and how it may inform our motivations to care for nature. Study 1 found that one’s perceived relationship with nature stems from how nature affects oneself, while Study 2 uncovered affective and moral mechanisms informing one's willingness to sacrifice for nature. Overall, these findings highlight how the perceived threat of climate change towards oneself underscores one’s relationship with nature and motivations to protect it.
Topological invariants for interacting systems: from twisted boundary condition to center-of-mass momentum
Creators: name: Lin, Ling
name: Ke, Yongguan
name: Lee, Chaohong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Beyond the well-known topological band theory for single-particle systems, it is a great challenge to characterize the topological nature of interacting multi-particle quantum systems. Here, we uncover the relation between topological invariants defined through the twist boundary condition (TBC) and the center-of-mass (c.m.) momentum state in multi-particle systems. We find that the Berry phase defined through TBC can be equivalently obtained from the multi-particle Wilson loop formulated by c.m. momentum states. As the Chern number can be written as the winding of the Berry phase, we consequently prove the equivalence of Chern numbers obtained via TBC and c.m. momentum state approaches. As a proof-of-principle example, we study topological properties of the Aubry-Andr{é}-Harper (AAH) model. Our numerical results show that the TBC approach and c.m. approach are well consistent with each other for both many-body case and few-body case. Our work lays a concrete foundation and provides new insights for exploring multi-particle topological states.
description: 17 pages, 7 figures
Relative quantum cohomology
Creators: name: Solomon, Jake P.
name: Tukachinsky, Sara B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Symplectic Geometry (math.SG)
subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D45, 53D37 (Primary), 14N35, 14N10, 53D12 (Secondary)

description: We establish a system of PDE, called open WDVV, that constrains the bulk-deformed superpotential and associated open Gromov-Witten invariants of a Lagrangian submanifold $L \subset X$ with a bounding chain. Simultaneously, we define the quantum cohomology algebra of $X$ relative to $L$ and prove its associativity. We also define the relative quantum connection and prove it is flat. A wall-crossing formula is derived that allows the interchange of point-like boundary constraints and certain interior constraints in open Gromov-Witten invariants. Another result is a vanishing theorem for open Gromov-Witten invariants of homologically non-trivial Lagrangians with more than one point-like boundary constraint. In this case, the open Gromov-Witten invariants with one point-like boundary constraint are shown to recover certain closed invariants. From open WDVV and the wall-crossing formula, a system of recursive relations is derived that entirely determines the open Gromov-Witten invariants of $(X,L) = (\mathbb{C}P^n, \mathbb{R}P^n)$ with $n$ odd, defined in previous work of the authors. Thus, we obtain explicit formulas for enumerative invariants defined using the Fukaya-Oh-Ohta-Ono theory of bounding chains.
description: 70 pages, 9 figures; corrected minor errors, updated bibliography
Living in Curved Momentum Space
Creators: name: Kowalski-Glikman, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we review some aspects of relativistic particles' mechanics in the case of a non-trivial geometry of momentum space. We start with showing how the curved momentum space arises in the theory of gravity in 2+1 dimensions coupled to particles, when (topological) degrees of freedom of gravity are solved for. We argue that there might exist a similar topological phase of quantum gravity in 3+1 dimensions. Then we characterize the main properties of the theory of interacting particles with curved momentum space and the symmetries of the action. We discuss the spacetime picture and the emergence of the principle of relative locality, according to which locality of events is not absolute but becomes observer dependent, in the controllable, relativistic way. We conclude with the detailed review of the most studied kappa-Poincare framework, which corresponds to the de Sitter momentum space.
description: 22 pages. In version 2, discussion of Lorentz symmetry on pp. 11 and 18 corrected
Can You Imagine a Better Academic E-book Experience? Piloting SimplyE in Academic Libraries
Creators: name: Cartolano, Robert T.
name: English, James
name: Kimpton, Michele
Publisher: name: Columbia University
Year: 2020
Subjects: Library science
Digital libraries
Electronic books

description: SimplyE, an end-user library reading app for ebook and audiobooks developed by the New York Public Library, continues to gain momentum across public and academic libraries. New efforts are underway to better understand the needs of academic ebook readers and advance open-source software to meet the needs of institutions and students. SimplyE and the technologies it uses have evolved and proliferated. User expectations have evolved. With more media types, digital rights management (DRM), and content hosting capabilities it is now closer than ever to becoming an ebook solution for academic libraries. Learn about recent accomplishments, current efforts, and future plans to improve SimplyE and expand its use in academic and public libraries.
Nothing But the Truthiness: Facts and Fiction in Alternate World War II History Films
Creators: name: Gale, Harrison Renee
Publisher: name: Columbia University
Year: 2020
Subjects: Motion pictures
Alternative histories (Fiction)
World War (1939-1945)

description: In 2005, the Comedy Central program The Colbert Report coined the word “truthiness”: what is true matters less than what feels true. This once tongue-in-cheek philosophy about facts has unexpectedly become an encapsulation of the current political atmosphere in America – one where political figures can lie with impunity, shaping reality to their ideological agenda. Film lends itself to the aim of alternate histories to create substitute “realities” in fiction: the very nature of fictional narrative cinema requires the filmmaker to edit images to simulate a “real” world within the frame. As a medium, cinema finds itself pulled between a desire for photorealism and creating a fictional world. Alternate histories play with the photographic attempts at “objectivity” by portraying a narrative counter to historical fact. This thesis examines the capability of alternate history narratives in film to provide a lens into the current political mindset and to offer the potential to heal historical violence by examining three films centered around World War II (a period that frequently serves as a “nexus point” for alternate historians): The Big Red One (1980, dir. Samuel Fuller), a “control” film in line with the facts of the war; It Happened Here (1964, dir. Kevin Brownlow and Andrew Mollo), a hybrid mock-documentary and drama that imagines a Nazi invasion of Britain; and Inglourious Basterds (2009, dir. Quentin Tarantino), which presents an earlier Allied victory through the lens of a Jewish revenge fantasy. What are the cultural ramifications of seeing narratives that are counter to history in an era when the dismissal and obscuring of fact have become commonplace, even expected, of people in power? Can these films serve as an arena to challenge the deceptive distortion of history and fact, and how can they redefine “truth” in a post-truth world?
Energy-momentum tensor from the Yang-Mills gradient flow
Creators: name: Suzuki, Hiroshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The product of gauge fields generated by the Yang-Mills gradient flow for positive flow times does not exhibit the coincidence-point singularity and a local product is thus independent of the regularization. Such a local product can furthermore be expanded by renormalized local operators at zero flow time with finite coefficients that are governed by renormalization group equations. Using these facts, we derive a formula that relates the small flow-time behavior of certain gauge-invariant local products and the correctly-normalized conserved energy-momentum tensor in the Yang-Mills theory. Our formula provides a possible method to compute the correlation functions of a well-defined energy-momentum tensor by using lattice regularization and Monte Carlo simulation.
description: 17 pages, 17 figures, errors in the one-loop calculation were corrected
Quantum electrodynamics in the null-plane causal perturbation theory II
Creators: name: Acevedo, O. A.
name: Pimentel, B. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a complete formulation of quantum gauge invariance in light-front dynamics for interacting theories with massless vector gauge fields in the framework of null-plane causal perturbation theory. We apply the general results to quantum electrodynamics, showing that the so-called "gauge terms" present in the photon commutation distribution when quantized under the null-plane gauge condition have no contribution in the calculation of the physical S-operator matrix elements at any order. We use this result to prove the normalizability of the theory, and to calculate the electron's self-energy at second order.
description: To be published in Phys. Rev. D
Alterthümer der Umgegend von Duisburg
Creators: name: Wilms, Moritz
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 52 (1872): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
Optimal upper and lower bounds for the true and empirical excess risks in heteroscedastic least-squares regression
Creators: name: Saumard, Adrien
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We consider the estimation of a bounded regression function with nonparametric heteroscedastic noise and random design. We study the true and empirical excess risks of the least-squares estimator on finite-dimensional vector spaces. We give upper and lower bounds on these quantities that are nonasymptotic and optimal to first order, allowing the dimension to depend on sample size. These bounds show the equivalence between the true and empirical excess risks when, among other things, the least-squares estimator is consistent in sup-norm with the projection of the regression function onto the considered model. Consistency in the sup-norm is then proved for suitable histogram models and more general models of piecewise polynomials that are endowed with a localized basis structure.
description: 58 pages
Mobility restores the mechanism which supports cooperation in the voluntary prisoner's dilemma game
Creators: name: Cardinot, Marcos
name: O'Riordan, Colm
name: Griffith, Josephine
name: Szolnoki, Attila
Publisher: name: arXiv
Year: 2019
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computer Science and Game Theory (cs.GT)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: It is generally believed that in a situation where individual and collective interests are in conflict, the availability of optional participation is a key mechanism to maintain cooperation. Surprisingly, this effect is sensitive to the use of microscopic dynamics and can easily be broken when agents make a fully rational decision during their strategy updates. In the framework of the celebrated prisoner's dilemma game, we show that this discrepancy can be fixed automatically if we leave the strict and frequently artifact condition of a fully occupied interaction graph, and allow agents to change not just their strategies but also their positions according to their success. In this way, a diluted graph where agents may move offers a natural and alternative way to handle artifacts arising from the application of specific and sometimes awkward microscopic rules.
description: 15 pages, 8 figures; accepted for publication in New Journal of Physics
Dictionnaire raisonné du mobilier Français de l’époque Carlovingienne à la renaissance par M. Viollet-le-Duc
Creators: name: Otte, Heinrich
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Dictionnaire raisonné du mobilier Français de l’époque Carlovingienne à la renaissance par M. Viollet-le-Duc, architecte. Tome I. Paris. Bance, éditeur 1858. T. II—V. Ve A. Morel & Cie., éditeurs 1871—73. 8.
description: Bonner Jahrbücher, Bd. 55/56 (1875): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
Quantum critical metals in $d=3+1$
Creators: name: Mahajan, R.
name: Ramirez, D. M.
name: Kachru, S.
name: Raghu, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the problem of disorder-free metals near a continuous Ising nematic quantum critical point in $d=3+1$ dimensions. We begin with perturbation theory in the `Yukawa' coupling between the electrons and undamped bosons (nematic order parameter fluctuations) and show that the perturbation expansion breaks down below energy scales where the bosons get substantially Landau damped. Above this scale however, we find a regime in which low-energy fermions obtain an imaginary self-energy that varies linearly with frequency, realizing the `marginal Fermi liquid' phenomenology\cite{Varma}. We discuss a large N theory in which the marginal Fermi liquid behavior is enhanced while the role of Landau damping is suppressed, and show that quasiparticles obtain a decay rate parametrically larger than their energy.
description: 5 pages, 2 figures
Römische Alterthümer in Heidelberg. I. Zwei römische Töpferöfen und Häusersouterrains bei Heidelberg
Creators: name: Stark, Carl Bernhard
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 62 (1878): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
College
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: A comic sequence with an announcement for a nuclear bomb. A German song, "Charlie Brown" plays. A German version of "Ooh Eeh Ah Aah Ting Tang," plays. Fass says that this is the first in an "interminable" program. A clip from Walter Camp's fitness program plays.
Ueber die römischen Befestigungen im Odenwald
Creators: name: Seeger, Friedrich Hermann Wilhelm
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 62 (1878): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
Chaotic mode-competition dynamics in a multimode semiconductor laser with optical feedback and injection
Creators: name: Iwami, Ryugo
name: Kanno, Kazutaka
name: Uchida, Atsushi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Photonic computing is attracting increasing interest to accelerate information processing in machine learning applications. The mode-competition dynamics of multimode semiconductor lasers is useful for solving the multi-armed bandit problem in reinforcement learning for computing applications. In this study, we numerically evaluate the chaotic mode-competition dynamics in a multimode semiconductor laser with optical feedback and injection. We observe the chaotic mode-competition dynamics among the longitudinal modes and control them by injecting an external optical signal into one of the longitudinal modes. We define the dominant mode as the mode with the maximum intensity; the dominant-mode ratio for the injected mode increases as the optical injection strength increases. We find that the characteristics of the dominant mode ratio in terms of the optical injection strength are different among the modes owing to the different optical feedback phases. We propose a control technique for the characteristics of the dominant mode ratio by precisely tuning the initial optical frequency detuning between the optical injection signal and injected mode. We also evaluate the relationship between the region for the large dominant mode ratio and injection locking range. The region for the large dominant mode ratio does not correspond to the injection-locking range. This discrepancy results from the complex mode-competition dynamics in multimode semiconductor lasers with both optical feedback and injection. This control technique of chaotic mode-competition dynamics in multimode lasers is promising for applications in reinforcement learning and reservoir computing as photonic artificial intelligence.
description: 17 pages, 12 figures, 1 table
Protective Services for Shipments of Carton Loads of California Oranges and Lemons
Creators: name: Atrops, Ervin P.
name: Redit, Walter H.
name: Atrops, Ervin P.
name: Redit, Walter H.
Publisher: name: Unknown
Year: 1962
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpt from the report Summary: Modified icing services, together with some form of precooling, resulted in satisfactory transit protection for California citrus shipped in hot weather. Winter shipments cooled almost as well under ventilation as with ice refrigeration except for a 24- to 30-hour delay in reaching cold weather on the northern route. Thermostatically controlled continuously powered fans in iced cars provided the best cooling and transit temperatures. Transit temperatures of oranges and lemons, as affected by various protective services, were obtained in two transcontinental tests from California to New York City. One test of 14 cars of Valencia oranges and lemons was conducted from southern California districts in August. In the other, 12 cars of navel oranges were shipped from the central California area in January. In the latter test, two thermostatically controlled fan cars were included. All other cars were of the conventional electric fan type.
Teleportation criteria based on maximum eigenvalue of the shared $d\otimes d$ dimenional mixed state: Beyond Singlet Fraction
Creators: name: Garg, Anuma
name: Adhikari, Satyabrata
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive a criteria for the detection of $d\otimes d$ dimensional negative partial transpose (NPT) entangled state useful for teleportation. The newly derived criteria are based on the maximum eigenvalue of the NPT entangled state, which is easier to determine experimentally than to completely reconstruct the state via tomography. We then illustrate our criteria by considering a class of qubit-qubit system and qutrit-qutrit system.
description: 8 pages, 2 figures Accepted in International Journal of Theoretical Physics, January 2021
Giancarlo Conestabile, Di un Anello Etrusco in argento della collczione Strozzi in Firenze, Rom 1877
Creators: name: Dütschke, Hans
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Giancarlo Conestabile, Di un Anello Etrusco in argento della collczione Strozzi in Firenze; Auszug aus den „Memoire della R. Accademia dei Lincei, CCLXXIV“. Roma 1877.
description: Bonner Jahrbücher, Bd. 62 (1878): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
Moments of the neutron $g_2$ structure function at intermediate $Q^2$
Creators: name: Solvignon, P.
name: Liyanage, N.
name: Chen, J. -P.
name: Choi, Seonho
name: Slifer, K.
name: Aniol, K.
name: Averett, T.
name: Boeglin, W.
name: Camsonne, A.
name: Cates, G. D.
name: Chang, C. C.
name: Chudakov, E.
name: Craver, B.
name: Cusanno, F.
name: Deur, A.
name: Dutta, D.
name: Ent, R.
name: Feuerbach, R.
name: Frullani, S.
name: Gao, H.
name: Garibaldi, F.
name: Gilman, R.
name: Glashausser, C.
name: Gorbenko, V.
name: Hansen, O.
name: Higinbotham, D. W.
name: Ibrahim, H.
name: Jiang, X.
name: Jones, M.
name: Kelleher, A.
name: Kelly, J.
name: Keppel, C.
name: Kim, W.
name: Korsch, W.
name: Kramer, K.
name: Kumbartzki, G.
name: LeRose, J. J.
name: Lindgren, R.
name: Ma, B.
name: Margazioti, D. J.
name: Markowitz, P.
name: McCormick, K.
name: Meziani, Z. -E.
name: Michaels, R.
name: Moffit, B.
name: Monaghan, P.
name: Camacho, C. Munoz
name: Paschke, K.
name: Reitz, B.
name: Saha, A.
name: Shneor, R.
name: Singh, J.
name: Sulkosky, V.
name: Tobias, A.
name: Urciuoli, G. M.
name: Wang, K.
name: Wijesooriya, K.
name: Wojtsekhowski, B.
name: Woo, S.
name: Yang, J. -C.
name: Zheng, X.
name: Zhu, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present new experimental results of the $^3$He spin structure function $g_2$ in the resonance region at $Q^2$ values between 1.2 and 3.0 (GeV/c)$^2$. Spin dependent moments of the neutron were then extracted. Our main result, the resonance contribution to the neutron $d_2$ matrix element, was found to be small at $$=2.4 (GeV/c)$^2$ and in agreement with the Lattice QCD calculation. The Burkhardt-Cottingham sum rule for $^3$He and the neutron was tested with the measured data and using the Wandzura-Wilczek relation for the low $x$ unmeasured region. A small deviation was observed at $Q^2$ values between 0.5 and 1.2 (GeV/c)$^2$ for the neutron.
title: Στατιστική ανάλυση των στοιχείων λειτουργίας και κρατήσεων του πάγιου εξοπλισμού του ορυχείου Καρδιάς-Προγραμματισμός παραγωγής
Creators: name: Ζερβάκη Χρυσούλα
Publisher: name: Technical University of Crete
Year: 1994

description: Μη διαθέσιμο
H. Heydemann, Die Knöchelspielerin im Palazzo Colonna zu Rom, Halle 1877
Creators: name: Dütschke, Hans
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: H. Heydemann: „Die Knöchelspielerin im Palazzo Colonna zu Rom.“ Zweites Hallisches Winkeimannsprogramm. Halle 1877. M. 2 Taf. u. 2 Holzschn.
description: Bonner Jahrbücher, Bd. 62 (1878): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach
Creators: name: Spychala, Kai J.
name: Amber, Zeeshan H.
name: Eng, Lukas M.
name: Rüsing, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Coherent nonlinear optical micro-spectroscopy is a frequently used tool in modern material science, as it is sensitive to many different local observables, which comprise, among others, crystal symmetry and vibrational properties. The richness in information, however, may come with challenges in data interpretation, as one has to disentangle the many different effects like multiple reflections, phase jumps at interfaces, or the influence of the Guoy-phase. In order to facilitate interpretation, the work presented here proposes an easy-to-use semi-analytical modeling ansatz, that bases upon known analytical solutions using Gaussian beams. Specifically, we apply this ansatz to compute nonlinear optical responses of (thin film) optical materials. We try to conserve the meaning of intuitive parameters like the Gouy-phase and the nonlinear coherent interaction length. In particular, the concept of coherence length is extended, which is a must when using focal beams. The model is subsequently applied to exemplary cases of second-harmonic and third-harmonic generation. We observe a very good agreement with experimental data and furthermore, despite the constraints and limits of the analytical ansatz, our model performs similarly well as when using more rigorous simulations. However, it outperforms the latter in terms of computational power, requiring more than three orders less computational time and less performant computer systems.
title: Μελέτη της ορυκτολογικής, χημικής και κοκκομετρικής σύστασης λίθων και κονιαμάτων του Μεγάλου Αρσεναλίου της πόλης των Χανίων
Creators: name: Κατσαντώνης-Αντωνιάδης Γεώργιος
Publisher: name: Technical University of Crete
Year: 1994

description: Μη διαθέσιμο
Andreas Hofeneder, Die Religion der Kelten in den antiken literarischen Zeugnissen. Sammlung, Übersetzung und Kommentierung, Band II. Von Cicero bis Florus
Creators: name: Tommasi, Chiara O.
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Andreas Hofeneder, Die Religion der Kelten in den antiken literarischen Zeugnissen. Sammlung, Übersetzung und Kommentierung, Band II. Von Cicero bis Florus. Verlag der Österreichischen Akademie der Wissenschaften, Vienna 2008. 675 pagine
description: Bonner Jahrbücher, Bd. 208.2008(2010): Bonner Jahrbücher