cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum Hamilton-Jacobi analysis of PT symmetric Hamiltonians
Creators: name: Ranjani, S. Sree
name: Kapoor, A. K.
name: Panigrahi, Prasanta K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We apply the quantum Hamilton-Jacobi formalism, naturally defined in the complex domain, to a number of complex Hamiltonians, characterized by discrete parity and time reversal (PT) symmetries and obtain their eigenvalues and eigenfunctions. Examples of both quasi-exactly and exactly solvable potentials are analyzed and the subtle differences, in the singularity structures of their quantum momentum functions, are pointed out. The role of the PT symmetry in the complex domain is also illustrated.
description: 11 pages
Boundary terms in string field theory
Creators: name: Fırat, Atakan Hilmi
name: Mamade, Raji Ashenafi
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We supplement the string field theory action with boundary terms to make its variational principle well-posed. Central to our considerations is the violation of the stress-energy tensor conservation in non-compact CFTs due to the boundary terms. This manifests as the failure of the cyclicity of the BRST operator, which encodes the target space integration by parts identities at the level of the worldsheet. Using this failure, we argue that the free closed string field theory action admits a well-posed variational principle upon including an additional boundary contribution. We explicitly work out the resulting action up to the massless level and show that it is related to the expansion of the low-energy effective string action endowed with the Gibbons-Hawking-York term on a flat background. We also discuss the structure of the boundary terms in the interacting theory.
description: 25 pages; v2: journal version
Microwave-assisted synthesis of α-aminophosphonates with sterically demanding α-aryl substituents
Creators: name: Hudson, Harry R.
name: Tajti, Ádám
name: Bálint, Erika
name: Czugler, Mátyás
name: Karaghiosoff, Konstantin
name: Keglevich, György
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: A series of N-benzhydryl protected α-aminophosphonates with α-phenyl, α-(1-naphtyl), α-(9-anthryl) or α-(1-pyrenyl) substituents was synthesized by the Kabachnik–Fields condensation of diphenylmethylamine (benzhydrylamine), the corresponding aryl aldehyde and a dialkyl phosphite under MW irradiation. X-ray studies performed at low temperatures for a few of these α-aminophosphonates confirmed the presence of unusually short intramolecular Cα–Hδ+ ··· δ+H–Cperi contacts.
Modified and environmentally friendly oxidation of phosphorane ylides to vicinal tricarbonyls using unsupported moist Oxone in dichloromethane
Creators: name: Kieseung Lee
name: Lee, Richard S.
name: Lee, Joanne S.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Modified and eco-friendly oxidation of phosphorane ylides to the corresponding vicinal tricarbonyls (VTC) using unsupported moist Oxone in dichloromethane at room temperature is described. This green oxidation protocol is simple, mild, and highly efficient to operate, and allowing a chemoselective preparation of VTC from various phosphorane ylides without tedious workup procedures of extraction/drying process in excellent yields.
A Comparison of Rotating and Binary Stellar Evolution Models: Effects on Massive Star Populations
Creators: name: Dorn-Wallenstein, Trevor Z.
name: Levesque, Emily M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Both rotation and interactions with binary companions can significantly affect massive star evolution, altering interior and surface abundances, mass loss rates and mechanisms, observed temperatures and luminosities, and their ultimate core-collapse fates. The Geneva and BPASS stellar evolution codes include detailed treatments of rotation and binary evolutionary effects, respectively, and can illustrate the impact of these phenomena on massive stars and stellar populations. However, a direct comparison of these two widely-used codes is vital if we hope to use their predictions for interpreting observations. In particular, rotating and binary models will predict different young stellar populations, impacting the outputs of stellar population synthesis (SPS) and the resulting interpretation of large massive star samples based on commonly-used tools such as star count ratios. Here we compare the Geneva and BPASS evolutionary models, using an interpolated SPS scheme introduced in our previous work and a novel Bayesian framework to present the first in-depth direct comparison of massive stellar populations produced from single, rotating, and binary non-rotating evolution models. We calculate both models' predicted values of star count ratios and compare the results to observations of massive stars in Westerlund 1, $h + χ$ Persei, and both Magellanic Clouds. We also consider the limitations of both the observations and the models, and how to quantitatively include observational completeness limits in SPS models. We demonstrate that the methods presented here, when combined with robust stellar evolutionary models, offer a potential means of estimating the physical properties of massive stars in large stellar populations.
description: 17 pages, 7 figures, 2 tables. Accepted for publication in ApJ
Aging and scaling laws in $β$-hydroquinone-clathrate
Creators: name: Rheinstädter, Maikel C.
name: Rieger, Heiko
name: Knorr, Klaus
Publisher: name: arXiv
Year: 2003
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The dielectric permittivity of the orientational glass methanol(x=0.73)-$β$-hydroquinone-clathrate has been studied as function of temperature and waiting time using different temperature-time-protocols. We study aging, rejuvenation and memory effects in the glassy phase and discuss similarities and differences to aging in spin-glasses. We argue that the diluted methanol-clathrate, although conceptually close to its magnetic pendants, takes an intermediate character between a true spin-glass and a pure random field system.
Conformal Cores of Quantum Black Holes in Quadratic Gravity
Creators: name: Liu, Ruolin
name: Quintin, Jerome
name: Afshordi, Niayesh
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We explore the possibility that quadratic gravity, as a renormalizable theory, describes the interior of quantum black holes. We find new exact power-law solutions to pure quadratic gravity under spherical symmetry, which are complex valued. The resulting solutions, dubbed powerballs, are horizonless compact objects that become Schwarzschild-like a small distance (of the order of the Planck length) outside the would-be Schwarzschild horizon. We present a description of the global eternal geometry, whose right and left exteriors are Lorentzian and Euclidean Schwarzschild-like regions, respectively, while the complex interior is a form of spiraling spacetime. We compute the total on-shell action integral as a saddle point to a gravitational path integral and discuss the Lorentzian and Euclidean interpretations thereof.
description: 24 pages, 4 figures; v2: minor changes and references added, matches published version
THE NEED FOR CONTRACTORS
Creators: name: Forte, A.J.
name: Forte, A.J.
Publisher: name: Unknown
Year: 1992
Subjects: Food Consumption/Nutrition/Food Safety

description: Over the years, many industrialists, having seen the advantages of keeping the workforce on-site during meal breaks, have adopted the same attitude. Most of them accept that catering is a skilled profession and that, the scope of their own management is unlikely to stretch to the provision of food for t􀀒e workforce. Some may think that a part-time cook and helpers, under the guidance of a personnel director, can cope with the task. However, the wise and those with first hand experience of the problems which can hit, even the simplest of staff feeding operations, are likely to opt for the professional catering contractor, who will take all the worries off his shoulders.
Are Stellar Embryos in Perseus Radio-Synchrotron Emitters? Statistical data analysis with Herschel and LOFAR paving the way for the SKA
Creators: name: Bracco, Andrea
name: Padovani, Marco
name: Galli, Daniele
name: Pezzuto, Stefania
name: Cipriani, Alexandre
name: Drabent, Alexander
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Cosmic rays (CRs) are fundamental to the chemistry and physics of star-forming regions, influencing molecular gas ionization, mediating interactions with interstellar magnetic fields, and regulating star formation from the diffuse interstellar medium to the creation of stellar cores. The electronic GeV component of CRs is expected to produce non-thermal synchrotron radiation detectable at radio frequencies, yet such emissions from Galactic star-forming regions remain elusive. This study reports the first statistical attempt to detect synchrotron emission at 144 MHz using the LOw Frequency ARray (LOFAR) in the nearby Perseus molecular cloud (300 pc). By median-stacking 353 prestellar and 132 protostellar cores from the Herschel Gould Belt Survey and using LOFAR Two-Meter Sky Survey (LoTSS) data (20" resolution), 18 protostellar and 5 prestellar radio candidates were initially identified. However, these were likely extragalactic contaminants within the Herschel catalog. Stacked analyses did not reveal significant radio counterparts for prestellar and protostellar cores, with upper limits of $5\, μ$Jy beam$^{-1}$ and $8\, μ$Jy beam$^{-1}$, respectively. Non-detections suggest strong extinction mechanisms like free-free absorption and the Razin-Tsytovich effect for protostellar cores. For prestellar cores, analytical magnetostatic-isothermal models constrain the maximum ordered magnetic-field strength to 100 $μ$G. Future predictions suggest that Square Kilometre Array-Low (SKA-Low) arrays could detect this emission in 9 hours (AA*) or 4 hours (AA4), enabling more sensitive constraints on synchrotron radiation in star-forming cores.
description: 13 pages, 14 figures, 2 Appendices. Accepted for publication in Astronomy & Astrophysics
Evidence for the positive-strangeness pentaquark $Θ^+$ in photoproduction with the SAPHIR detector at ELSA
Creators: name: The SAPHIR Collaboration
name: Barth, J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The positive--strangeness baryon resonance $Θ^+$ is observed in photoproduction of the $\rm nK^+K^0_s$ final state with the SAPHIR detector at the Bonn ELectron Stretcher Accelerator ELSA. It is seen as a peak in the $\rm nK^+$ invariant mass distribution with a $4.8σ$ confidence level. We find a mass $\rm M_{Θ^+} = 1540\pm 4\pm 2$ MeV and an upper limit of the width $\rm Γ_{Θ^+} < 25$ MeV at 90% c.l. From the absence of a signal in the $\rm pK^+$ invariant mass distribution in $\rmγp\to pK^+K^-$ at the expected strength we conclude that the $Θ^+$ must be isoscalar.
description: 9 pages, 4 figures
A chiral qbarqbarqq nonet?
Creators: name: Napsuciale, Mauro
name: Rodriguez, Simon
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We point out that meson spectrum indicates the existence of a degenerate chiral nonet in the energy region around 1.4 GeV with a slightly inverted spectrum with respect to a qq nonet. Based on this observation, the approximately linear rising of the mass of a hadron with the number of constituent quarks, and the existence of a cuasidegenerate pseudoscalar nonet, we conjecture the existence of a tetraquark chiral nonet in this energy region with chiral symmetry implemented directly. We realize this idea in a chiral model and take into account the mixing of the tetraquark chiral nonet with a conventional qq nonet. We find that the mass spectrum of mesons below 1.5 GeV is consistent with this picture. In general, pseudoscalar states arise as mainly qq states but scalar states turn out to be strong admixtures of qq and tetraquark states.
description: 8 pages, 3 figures
Innate Motivation for Robot Swarms by Minimizing Surprise: From Simple Simulations to Real-world Experiments (plots, data and video)
Creators: name: Kaiser, Tanja Katharina
name: Hamann, Heiko
Publisher: name: Zenodo
Year: 2021

description: Applications of large-scale mobile multi-robot systems can be beneficial over monolithic robots because of higher potential for robustness and scalability. Developing controllers for multi-robot systems is generally challenging because the multitude of interactions is both hard to anticipate and difficult to model. Automatic design using machine learning or evolutionary robotics seems an option to avoid that challenge. What remains then is the challenge of designing reward or fitness functions. Generic reward and fitness functions seem unlikely to exist and task-specific rewards have often undesired side effects. Approaches of so-called innate motivation try to avoid the specific formulation of rewards and work instead with different drivers, such as curiosity. Our approach to innate motivation is to minimize surprise that we implement by maximizing the accuracy of the swarm robot's sensor predictions using methods of evolutionary computation and artificial neural networks. A unique advantage of the swarm robot case is that swarm members populate the robot's environment and can trigger more active behaviors in a self-referential loop. We summarize our previous simulation-based results concerning behavioral diversity, robustness, scalability, and engineered self-organization, and put them into context. In several new studies, we analyze the influence of the optimizer's hyperparameters, the scalability of evolved behaviors, and the impact of realistic robot simulations. Finally, we present results using real robots that show how the reality gap can be bridged.
New global solutions of the Jacobi partial differential equations
Creators: name: Hernández-Bermejo, Benito
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A new family of solutions of the Jacobi partial differential equations for finite-dimensional Poisson systems is investigated. This family is mathematically remarkable, as the functional dependences of the solutions appear to be associated to the distinguished invariants of the solutions themselves. This kind of Poisson structure (termed distinguished solutions or D-solutions) is defined for every nontrivial combination of values of the dimension and the rank, and is also determined in terms of functions of arbitrary nonlinearity, properties usually not present simultaneously in the already known solution families. In addition, D-solutions display several properties allowing the generation of an infinity of D-solutions from a given one, which is an uncommon feature in the framework of the Jacobi equations. Furthermore, a special family of D-solutions complying with the previous requirements is constructively characterized and analyzed. Examples are discussed focusing on physical implications and including an application for the global construction of the Darboux canonical form.
Complete dispersive evaluation of the hadronic light-by-light contribution to muon $g-2$
Creators: name: Hoferichter, Martin
name: Stoffer, Peter
name: Zillinger, Maximilian
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Hadronic light-by-light (HLbL) scattering defines one of the critical contributions in the Standard-Model prediction of the anomalous magnetic moment of the muon. In this Letter, we present a complete evaluation using a dispersive formalism, in which the HLbL tensor is reconstructed from its discontinuities, expressed in terms of simpler hadronic matrix elements that can be extracted from experiment. Profiting from recent developments in the determination of axial-vector transition form factors, short-distance constraints for the HLbL tensor, and the vector-vector-axial-vector correlator, we obtain $a_μ^\text{HLbL}=101.9(7.9)\times 10^{-11}$, which meets the precision requirements set by the final result of the Fermilab experiment.
description: 7 pages, 6 figures; journal version
Quantum Zeno subspace and entangled Bose-Einstein condensates
Creators: name: Zhang, M.
name: You, L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss a proposal for the efficient generation of the maximally entangled atomic N-GHZ state in a spinor-1 condensate by driving internal state atomic Raman transitions using (classical) laser fields. We illustrate the dynamics in terms of a quantum Zeno subspace, and identify the resultant atomic elastic collision in facilitating the deterministic entanglement creation. Our proposal can be readily implemented in several laboratories where ferromagnetic spinor condensates (of $^{87}$Rb atoms) are investigated.
description: 5 figures, to be published in PRL
Beyond quasi-particle self-consistent $GW$ for molecules with vertex corrections
Creators: name: Förster, Arno
Publisher: name: arXiv
Year: 2024
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We introduce the $Σ^{\text{BSE}}@L^{\text{BSE}}$ self-energy in the quasi-particle self-consistent $GW$ (qs$GW$) framework (qs$Σ^{\text{BSE}}@L^{\text{BSE}}$). Here, $L$ is the two-particle response function which we calculate by solving the Bethe-Salpeter equation with the static, first-order $GW$ kernel. The same kernel is added to $Σ$ directly. For a set of medium organic molecules, we show that including the vertex both in $L$ and $Σ$ is crucial. This approach retains the good performance of qs$GW$ for predicting first ionization potentials and fundamental gaps, while it greatly improves the description of electron affinities. Its good performance places qs$Σ^{\text{BSE}}@L^{\text{BSE}}$ among the best-performing electron propagator methods for charged excitations. Adding the vertex in $L$ only, as commonly done in the solid state community, leads to devastating results for electron affinities and fundamental gaps. We also test the performance of BSE@qs$GW$ and qs$Σ^{\text{BSE}}@L^{\text{BSE}}$ for neutral charge-transfer excitation and find both methods to perform similar. We conclude that $Σ^{\text{BSE}}@L^{\text{BSE}}$ is a promising approximation to the electronic self-energy beyond $GW$. We hope that future research on dynamical vertex effects, second-order vertex corrections, and full self-consistency will improve the accuracy of this method, both for charged and neutral excitation energies.
description: 5 figures
Deviation equations in spaces with a transport along paths
Creators: name: Iliev, Bozhidar Z.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 53B99 (Primary) 53Z05, 83C99 (Secondary)

description: The displacement and deviation vectors in spaces (manifolds), the tangent bundle of which is endowed with a transport along paths, are introduced. In case these spaces are equipped with a linear connection, the deviation equations (between arbitrary, geodesic or not, paths) in such spaces are investigated.
description: 16 LaTeX pages. For related papers, visit the "publication" pages at http://theo.inrne.bas.bg/~bozho
Singularities, Universality, and Scaling in Evaporative Deposition Patterns
Creators: name: Popov, Yuri
Publisher: name: arXiv
Year: 2003
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The theory of solute transfer and deposit growth in evaporating sessile drops on a plane substrate is presented. The main ideas and the principal equations are formulated. The problem is solved analytically for two important geometries: round drops (drops with circular boundary) and pointed drops (drops with angular boundary). The surface shape, the evaporation rate, the flow field, and the mass of the solute deposited at the drop perimeter are obtained as functions of the drying time and the drop geometry. In addition, a model accounting for the spatial extent of the deposit arising from the non-zero volume of the solute particles is solved for round drops. The geometrical characteristics of the deposition patterns as functions of the drying time, the drop geometry, and the initial concentration of the solute are found analytically for small initial concentrations of solute and numerically for arbitrary initial concentrations of solute. The universality of the theoretical results is emphasized, and comparison to the experimental data is made.
description: v1: 94 pages, 40 figures, LaTeX; Ph.D. thesis; v2: typos corrected, one illustration improved, other minor stylistic changes
Propulsion force and heat transfer for nonreciprocal nanoparticles
Creators: name: Henkes, Laila
name: Asheichyk, Kiryl
name: Krüger, Matthias
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze heat transfer and Casimir forces involving a nonreciprocal nanoparticle. By dissecting the resulting expressions into reciprocal and nonreciprocal contributions, we find that the particle's self emission contains $++$ and $--$ terms, i.e., the particle's reciprocal ($+$) and nonreciprocal ($-$) parts couple to the respective parts of its surrounding. In contrast, the heat transfer to the nanoparticle from the surrounding contains $-+$ and $+-$ contributions, which we find to persist at equal temperatures. For two nanoparticles, such persistent transfer is found to require one particle to be nonreciprocal and the other to be anisotropic. The propulsion force for the nanoparticle, for which our results agree with previous work, is dominated by $\pm\mp$ terms, making it distinct from forces found for reciprocal particles. The amplitude of the propulsion force can be orders of magnitude larger than gravitational forces. Despite being distinct, we find the $\pm\mp$ terms to be bound by $\pm\pm$ terms, a consequence of passivity of the objects. For the force, this bound limits the efficiency in a heat engine setup, as observed for parallel plates before.
description: 14 pages, 5 figures
Periodically poled thin film lithium niobate microring resonators with a second-harmonic generation efficiency of 250,000%/W
Creators: name: Lu, Juanjuan
name: Surya, Joshua B.
name: Liu, Xianwen
name: Bruch, Alexander W.
name: Gong, Zheng
name: Xu, Yuntao
name: Tang, Hong X.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Lithium niobate (LN), dubbed by many as the silicon of photonics, has recently risen to the forefront of chip-scale nonlinear optics research since its demonstration as an ultralow-loss integrated photonics platform. Due to its significant quadratic nonlinearity ($χ^{(2)}$), LN inspires many important applications such as second-harmonic generation (SHG), spontaneous parametric down-conversion, and optical parametric oscillation. Here, we demonstrate high-efficiency SHG in dual-resonant, periodically poled z-cut LN microrings, where quasi-phase matching is realized by field-assisted domain engineering. Meanwhile, dual-band operation is accessed by optimizing the coupling conditions in fundamental and second-harmonic bands via a single pulley waveguide. As a result, when pumping a periodically poled LN microring in the low power regime at around 1617nm, an on-chip SHG efficiency of 250,000%/W is achieved, a state-of-the-art value reported among current integrated photonics platforms. An absolute conversion efficiency of 15% is recorded with a low pump power of 115$μ$W in the waveguide. Such periodically poled LN microrings also present a versatile platform for other cavity-enhanced quasi-phase matched $χ^{(2)}$ nonlinear optical processes.
description: After Optica revision cycle
A Biblioteca na(s) Escola(s): de um Desnecessário Passado a um Futuro Cheio de Esperança?
Creators: name: Pessoa, Ana Maria
Publisher: name: Cadernos BAD
Year: 1996

description: A Biblioteca na(s) Escola(s): de um Desnecessário Passado a um Futuro Cheio de Esperança?
description: Cadernos BAD, N.º 2 (1996)
X-ray Binary Luminosity Function Scaling Relations in Elliptical Galaxies: Evidence for Globular Cluster Seeding of Low-Mass X-ray Binaries in Galactic Fields
Creators: name: Lehmer, Bret D.
name: Ferrell, Andrew P.
name: Doore, Keith
name: Eufrasio, Rafael T.
name: Monson, Erik B.
name: Alexander, David M.
name: Basu-Zych, Antara
name: Brandt, William N.
name: Sivakoff, Greg
name: Tzanavaris, Panayiotis
name: Yukita, Mihoko
name: Fragos, Tassos
name: Ptak, Andrew
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate X-ray binary (XRB) luminosity function (XLF) scaling relations for Chandra detected populations of low-mass XRBs (LMXBs) within the footprints of 24 early-type galaxies. Our sample includes Chandra and HST observed galaxies at D < 25 Mpc that have estimates of the globular cluster (GC) specific frequency (SN) reported in the literature. As such, we are able to directly classify X-ray-detected sources as being either coincident with unrelated background/foreground objects, GCs, or sources that are within the fields of the galaxy targets. We model the GC and field LMXB population XLFs for all galaxies separately, and then construct global models characterizing how the LMXB XLFs vary with galaxy stellar mass and SN. We find that our field LMXB XLF models require a component that scales with SN, and has a shape consistent with that found for the GC LMXB XLF. We take this to indicate that GCs are "seeding" the galactic field LMXB population, through the ejection of GC-LMXBs and/or the diffusion of the GCs in the galactic fields themselves. However, we also find that an important LMXB XLF component is required for all galaxies that scales with stellar mass, implying that a substantial population of LMXBs are formed "in situ," which dominates the LMXB population emission for galaxies with SN < 2. For the first time, we provide a framework quantifying how directly-associated GC LMXBs, GC-seeded LMXBs, and in-situ LMXBs contribute to LMXB XLFs in the broader early-type galaxy population.
description: Accepted for publication in ApJS. Data products and catalogs available at https://lehmer.uark.edu/downloads/
Jamming and geometric representations of graphs
Creators: name: Krauth, Werner
name: Loebl, Martin
Publisher: name: arXiv
Year: 2004
Subjects: subject: Combinatorics (math.CO)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 05C62

description: We expose a relationship between jamming and a generalization of Tutte's barycentric embedding. This provides a basis for the systematic treatment of jamming and maximal packing problems on two-dimensional surfaces.
Current Trends in Domestic Food Programs
Creators: name: Allen, Joyce
name: Holloway, Adrienne
name: Allen, Joyce
name: Holloway, Adrienne
Publisher: name: Unknown
Year: 1985
Subjects: Food Consumption/Nutrition/Food Safety

description: Participation and program costs discussed in this article compare the January-March quarter of 1985 with the same 3 months of 1984. Preliminary data are reported as of March 1985 and are subject to revision.
Modeling the astrosphere of LHS~1140
Creators: name: Scherer, K.
name: Herbst, K.
name: Engelbrecht, N. E.
name: Ferreira, S. E. S.
name: Kleimann, J.
name: Light, J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The cosmic ray (CR) flux, as well as the hydrogen flux into the atmosphere of an exoplanet, can change the composition of the atmosphere. Here, we present the CR and hydrogen flux on top of the atmosphere. To do so, we have to study the 3D multifluid MHD structure of astrospheres. We discuss the shock structure of the stellar wind of LHS 1140 using four different models: HD and MHD single-fluid models, as well as multifluid models for both cases, including a neutral hydrogen flow from the interstellar medium. The CR flux in a multifluid model as well as the ionization rate in an exoplanetary atmosphere are also presented. The astrosphere is modeled using the 3D Cronos code, while the CR flux at LHS 1140 b is calculated using both a 1D and a 3D stochastic galactic CR modulation code. Finally, the atmospheric ionization and radiation dose is estimated using the AtRIS code. Results. It is shown that the 3D multifluid positions of the termination shock differ remarkably from those found in the 3D ideal-single fluid hydrodynamic case. CR fluxes computed using a 1D approach are completely different from those calculated using the 3D modulation code and show an essentially unmodulated spectrum at the exoplanet in question. Utilizing these spectra, ionization rates and radiation exposure within the atmosphere of LHS 1140 b are derived. The termination shock, astropause, and bow shock distances must be taken from the 3D multifluid MHD model to determine the CR fluxes correctly. Moreover, because of the tiny astrosphere, the exoplanet is submerged in the neutral hydrogen flow of the interstellar medium, which will influence the exoplanetary atmosphere. A 3D approach to Galactic\0 cosmic ray (GCR) modulation in astrospheres is also necessary to avoid unrealistic estimates of GCR intensities.
description: 14 pages, 8 figure
Excitonic Magneto-Optical Kerr Effect in 2D Transition Metal Dichalcogenides Induced by Spin Proximity
Creators: name: Henriques, J. C. G.
name: Catarina, G.
name: Costa, A. T.
name: Fernández-Rossier, J.
name: Peres, N. M. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this paper we develop the excitonic theory of Kerr rotation angle in a two-dimensional (2D) transition metal dichalcogenide at zero magnetic field. The finite Kerr angle is induced by the interplay between spin-orbit splitting and proximity exchange coupling due to the presence of a ferromagnet. We compare the excitonic effect with the single particle theory approach. We show that the excitonic properties of the 2D material lead to a dramatic change in the frequency dependence of the optical response function. We also find that the excitonic corrections enhance the optical response by a factor of two in the case of MoS2 in proximity to a Cobalt thin film.
description: Accepted for publication in Physical Review B
Observation of an exceptional point in a non-Hermitian metasurface
Creators: name: Park, Sang Hyun
name: Lee, Sung-Gyu
name: Ha, Taewoo
name: Lee, Sanghyup
name: Baek, Soo-Jeong
name: Min, Bumki
name: Zhang, Shuang
name: Lawrence, Mark
name: Kim, Teun-Teun
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Exceptional points, also known as non-Hermitian degeneracies, have been observed in parity-time symmetric metasurfaces as the parity-time symmetry breaking point. However, the parity-time symmetry condition puts constraints on the metasurface parameter space, excluding full examination of the unique properties that stem from an exceptional point. Here, we thus design a general non-Hermitian metasurface with a unit cell containing two orthogonally oriented split-ring-resonators with overlapping resonance but different scattering rates and radiation efficiencies. Such a design grants us full access to the parameter space around the exceptional point. The parameter space around the exceptional point is first examined by varying the incident radiation frequency and coupling between split-ring resonators. We further demonstrate that the exceptional point is also observable by varying the incident radiation frequency along with the incident angle. Through both methods we validate the existence of an exceptional point by observing unique level crossing behavior, eigenstate swapping under encirclement and asymmetric transmission of circularly polarized light.
description: 7 pages, 4 figures
Understanding the experiences of graduate students with children at UBC : A campus planning and policy assessment
Creators: name: Gaganis, Adriana
name: Gelz, Mikayla
name: Setyabule, Isabella
name: To, Alvin
Publisher: name: The University of British Columbia
Year: 2021

description: This study is commissioned by the Graduate Student Society (GSS) in collaboration with and through the Social Ecological Economic Development Studies (SEEDS) Sustainability program, stemming from the need to explore the experiences of graduate student parents (GSPs) at UBC. Their voices are rendered invisible by insufficient institutional understanding. We began by conceptualizing the GSP experience along two interdependent axes, that of the social realm and that of the physical realm of university space. The physical realm, constituted by the built environment, both in terms of accessibility and family-related provisions. Our findings indicated that GSPs were generally satisfied with the existing infrastructure, yet there is room for improvement. The social realm includes social attitudes and stigma regarding GSPs and their position in the university. Our results show that this warrants more of a concern for them, as it also influences their ability to access accommodations such as extensions that rely on interactions with figures of authority (including supervisors, advisors, councils etc.) that may not be as empathetic to their special circumstances. This can also influence their ability to manage their multiple conflicting roles and negatively impact academic attainment. The visibility of this group presented as a key element for the improvement of university space and tackling the wide variety of issues and could act as a catalyst for positive change. Based on these results, we made a few recommendations to the GSS, including the need for more visible family-friendly spaces in the heart of campus, such as child-friendly studies areas and a greater abundance of breast- and bottle-feeding areas. We also recommend steps for the improvement of the social conduct of faculty and staff, as well as a call for redefinitions within university policy. We aim to provide a foundation for the future direction in research on this topic, that will foster even greater understanding, as well as contribute to the discussion in the reform of social attitudes and physical configurations for improved inclusivity of the graduate student parent. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
MAX2-independent transcriptional responses to rac-GR24 in Lotus japonicus roots
Creators: name: Carbonnel, Samy
name: Salar Torabi
name: Gutjahr, Caroline
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Plant Biology

description: Strigolactones (SLs) and smoke-derived Karrikins (KARs) are structurally similar butenolide compounds that control distinct aspects of plant development. They are perceived by two closely related α/β hydrolases D14 and KAI2, respectively. Responses to both molecules involve the F-box protein MAX2 that participates in the Skp1-Cullin-F-box (SCF) complex, which ubiquitylates developmental regulators of the SMXL family to mark them for degradation by the 26S proteasome, enabling SL and KAR responses. Current research on SL and KAR signaling uses the synthetic molecules rac-GR24, KAR1 and KAR2 for pharmacological treatments. In a previous microarray analysis, we observed transcriptional activation in response to rac-GR24 in Lotus japonicus seedling roots. We retested transcript accumulation of selected genes by quantitative PCR in the wild type and the max2-4 mutant, and found that surprisingly, a number of them respond to rac-GR24 in a MAX2-independent manner, and also respond in roots of d14 and kai2a kai2b double mutants. Thus, the synthetic compounds induce transcriptional responses independent of their perception by the canonical receptor complex.
Overdensity of Lyman-Break Galaxy Candidates Around Hot Dust-Obscured Galaxies
Creators: name: Zewdie, Dejene
name: Assef, Roberto J.
name: Lambert, Trystan
name: Mazzucchelli, Chiara
name: Loubser, S. Ilani
name: Aravena, Manuel
name: González-López, Jorge
name: Jun, Hyunsung D.
name: Tsai, Chao-Wei
name: Stern, Daniel
name: Li, Guodong
name: Aranda, Román Fernández
name: Díaz-Santos, Tanio
name: Eisenhardt, Peter R. M.
name: Vayner, Andrey
name: Martin, Lee R.
name: Blain, Andrew W.
name: Wu, Jingwen
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Hot dust-obscured galaxies (Hot DOGs), are a family of hyper-luminous, heavily obscured quasars. A number of studies have shown that these objects reside in significantly overdense regions of the Universe based on the identification of companions at optical through far-IR wavelengths. Here we present further characterization of their environments by studying the surface density of Lyman break galaxy (LBG) candidates in the vicinity of three Hot DOGs. For two of them, WISE J041010.60-091305.2 at z=3.631 and WISE J083153.25+014010.8 at z=3.912, we identify the candidate LBG companions using deep observations obtained with Baade/IMACS. For the third, WISE J224607.56-052634.9 at z=4.601, we re-analyse previously published data obtained with Gemini-S/GMOS-S. We optimise the LBG photometric selection criteria at the redshift of each target using the COSMOS2020 catalog. When comparing the density of LBG candidates found in the vicinity of these Hot DOGs with that in the COSMOS2020 catalog, we find overdensities of $δ=1.83\pm 0.08$ ($δ' = 7.49\pm 0.68$), $δ=4.67\pm 0.21$ ($δ' = 29.17\pm 2.21$), and $δ= 2.36\pm 0.25$ ($δ' = 11.60\pm 1.96$) around W0410-0913, W0831+0140, and W2246-0526, respectively, without (with) contamination correction. Additionally, we find that the overdensities are centrally concentrated around each Hot DOG. Our analysis also reveals that the overdensity of the fields surrounding W0410-0913 and W0831+0140 declines steeply beyond physical scales of $\sim$2 Mpc. If these overdensities evolve to clusters by z=0, these results suggest that the Hot DOG may correspond to the early formation stages of the brightest cluster galaxy. We were unable to determine if this is also the case for W2246-0526 due to the smaller field of view of the GMOS-S observations. Our results imply that Hot DOGs may be excellent tracers of protoclusters.
description: Accepted for publication in A&A, the manuscript consists of 14 pages, 16 figures, and 4 tables
Tomáš Cernušák, Pavel Marek, Gesandte und Klienten. Päpstliche und spanische Diplomaten im Umfeld von Kaiser Rudolf II., Berlin, Boston (De Gruyter Oldenbourg) 2020
Creators: name: Bechtold, Jonas
Publisher: name: Francia-Recensio
Year: 2021

description: Tomáš Cernušák, Pavel Marek, Gesandte und Klienten. Päpstliche und spanische Diplomaten im Umfeld von Kaiser Rudolf II., Berlin, Boston (De Gruyter Oldenbourg) 2020, VI–298 S., ISBN 978-3-11-061383-4, EUR 69,95.
description: Francia-Recensio, 2021/1
MusE GAs FLOw and Wind (MEGAFLOW) XIII. Cool gas traced by MgII around isolated galaxies
Creators: name: Cherrey, Maxime
name: Bouché, Nicolas F.
name: Zabl, Johannes
name: Schroetter, Ilane
name: Wendt, Martin
name: Langan, Ivanna
name: Schaye, Joop
name: Wisotzki, Lutz
name: Guo, Yucheng
name: Pessa, Ismael
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The circumgalactic medium (CGM) is a key component needed to understand the physical processes governing the flows of gas around galaxies. Quantifying its evolution and its dependence on galaxy properties is particularly important for our understanding of accretion and feedback mechanisms. We select a volume-selected sample of 66 {\it isolated} star-forming galaxies (SFGs) at $0.4< z <1.5$ with $\log(M_\star/M_{\odot})> 9$ from the MusE GAs FLOw and Wind (MEGAFLOW) survey. Using MgII 2796,2803 absorptions in background quasars, we measure the covering fraction $f_c$ and quantify how the cool gas profile depends on galaxy properties (such as star-formation rate (SFR), stellar mass ($M_\star$) or azimuthal angle relative to the line of sight) and how these dependencies evolve with redshift. The MgII covering fraction of isolated galaxies is a strong function of impact parameter, and is steeper than previously reported. The impact parameter $b_{50}$ at which $f_c = $50\% is $b_{50}=50\pm7$kpc ($65\pm7$ kpc) for $W_r^{2796}>$0.5 Å($W_r^{2796}>0.1$ Å), respectively. It is weakly correlated with SFR ($\propto$ SFR$^{0.08\pm0.09}$) and decreases with cosmic time ($\propto (1+z)^{0.8 \pm 0.7}$), contrary to the expectation of increasingly larger halos with time. The covering fraction is also higher along the minor axis than along the major axis at the $\approx 2 σ$ level. The CGM traced by \MgII{} is similar across the isolated galaxy population. Indeed, among the isolated galaxies with an impact parameter below 55 kpc, all have associated MgII absorption with $W_r^{2796}>$0.3Å, resulting in a steep covering fraction $f_c(b)$.
description: 23 pages, 7 figures, accepted for publication in A&A
Michael C. Carhart, Leibniz discovers Asia. Social Networking in the Republic of Letters, Baltimore (The Johns Hopkins University Press) 2019
Creators: name: Losfeld, Christophe
Publisher: name: Francia-Recensio
Year: 2021

description: Michael C. Carhart, Leibniz discovers Asia. Social Networking in the Republic of Letters, Baltimore (The Johns Hopkins University Press) 2019, 324 p., 13 ill., ISBN 978-1-42142-753-9, EUR 48,00.
description: Francia-Recensio, 2021/1
Inflation in large N limit of supersymmetric gauge theories
Creators: name: Jokinen, Asko
name: Mazumdar, Anupam
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Within supersymmetry we provide an example where the inflaton sector is derived from a gauge invariant polynomial of SU(N) or SO(N) gauge theory. Inflation in our model is driven by multi-flat directions, which assist accelerated expansion. We show that multi-flat directions can flatten the individual non-renormalizable potentials such that inflation can occur at sub-Planckian scales. We calculate the density perturbations and the spectral index, we find that the spectral index is closer to scale invariance for large N. In order to realize a successful cosmology we require large N of order, N~600.
description: 10 pages, LaTeX2e, misprints corrected, version accepted for publishing
Bettina Braun, Jan Kusber, Matthias Schnettger (Hg.), Weibliche Herrschaft im 18. Jahrhundert. Maria Theresia und Katharina die Große, Bielefeld (transcript) 2020
Creators: name: Renault, Rachel
Publisher: name: Francia-Recensio
Year: 2021

description: Bettina Braun, Jan Kusber, Matthias Schnettger (Hg.), Weibliche Herrschaft im 18. Jahrhundert. Maria Theresia und Katharina die Große, Bielefeld (transcript) 2020, 441 S., zahlr. s/w u. farb. Abb. (Mainzer Historische Kulturwissenschaften, 40), ISBN 978-3-8376-4355-8, EUR 49,99.
description: Francia-Recensio, 2021/1
Karl-Heinz Braun, Wilbirgis Klaiber, Christoph Moos (Hg.), Glaube(n) im Disput. Neuere Forschungen zu den altgläubigen Kontroversisten des Reformzeitalters, Münster (Aschendorff) 2019
Creators: name: Quisinsky, Michael
Publisher: name: Francia-Recensio
Year: 2021

description: Karl-Heinz Braun, Wilbirgis Klaiber, Christoph Moos (Hg.), Glaube(n) im Disput. Neuere Forschungen zu den altgläubigen Kontroversisten des Reformzeitalters, Münster (Aschendorff) 2019, 404 S. (Reformationsgeschichtliche Studien und Texte, 173), ISBN 978-3-402-11607-4, EUR 68,00.
description: Francia-Recensio, 2021/1
Joyful scene (莺歌燕舞)
Creators: name: Fei Zheng 费正
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Cultural pluralism
valueUri: http://id.worldcat.org/fast/1715991
subject: Unity Of Han And Other Nationalities

description: A diverse crowd enjoys an outdoor performance. Price: 14 fen