cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Machine learning of Kondo physics using variational autoencoders and symbolic regression
Creators: name: Miles, Cole
name: Carbone, Matthew R.
name: Sturm, Erica J.
name: Lu, Deyu
name: Weichselbaum, Andreas
name: Barros, Kipton
name: Konik, Robert M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We employ variational autoencoders to extract physical insight from a dataset of one-particle Anderson impurity model spectral functions. Autoencoders are trained to find a low-dimensional, latent space representation that faithfully characterizes each element of the training set, as measured by a reconstruction error. Variational autoencoders, a probabilistic generalization of standard autoencoders, further condition the learned latent space to promote highly interpretable features. In our study, we find that the learned latent variables strongly correlate with well known, but nontrivial, parameters that characterize emergent behaviors in the Anderson impurity model. In particular, one latent variable correlates with particle-hole asymmetry, while another is in near one-to-one correspondence with the Kondo temperature, a dynamically generated low-energy scale in the impurity model. Using symbolic regression, we model this variable as a function of the known bare physical input parameters and "rediscover" the non-perturbative formula for the Kondo temperature. The machine learning pipeline we develop suggests a general purpose approach which opens opportunities to discover new domain knowledge in other physical systems.
description: Update to match PRB publication + typo fixes + minor edits
Chiral spin spiral in synthetic antiferromagnets probed by circular dichroism in x-ray resonant magnetic scattering
Creators: name: Léveillé, Cyril
name: Flewett, Samuel
name: Burgos-Parra, Erick
name: Sassi, Yanis
name: Legrand, William
name: Ajejas, Fernando
name: Cros, Vincent
name: Reyren, Nicolas
name: Jaouen, Nicolas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Noncollinear chiral spin textures in ferromagnetic multilayers are at the forefront of recent research in nano-magnetism with the promise for fast and energy-efficient devices. The recently demonstrated possibilities to stabilize such chiral structures in synthetic antiferromagnets (SAF) has raised interests as they are immune to dipolar field, hence favoring the stabilization of ultra small textures, improve mobility and avoid the transverse deflections of moving skyrmions limiting the efficiency in some foreseen applications. However, such systems with zero net magnetization are hence difficult to characterize by most of the standard techniques. Here, we report that the relevant parameters of a magnetic SAF texture, those being its period, its type (Néel or Bloch) and its chirality (clockwise or counterclockwise), can be directly determined using the circular dichroism in x-ray resonant scattering (CD-XRMS) at half integer multilayer Bragg peaks in reciprocal space. The analysis of the dependence in temperature down to 40K allows us moreover to address the question of the temperature stability of a spin spiral in a SAF sample and of the temperature scaling of the symmetric and antisymmetric exchange interactions.
Estimation of genetic parameters of egg production in Single Comb White Leghorn chickens developed from a straincross
Creators: name: Reed, Shawna Eileen
Publisher: name: University of British Columbia
Year: 2010

description: In 1957, strains 3 and 4, two highly selected but unrelated strains of Single Comb White Leghorn chickens from Agriculture Canada's Animal Research Station at Ottawa were crossed to establish the Agassiz strain (strain 6). Further selection was imposed on strain 6 for improvements in hen-housed egg production (HHEP) based on part-records to 273 days and maintenance of egg weight, fertility, hatchability and viability. Data from 1957 to 1963 were analysed utilizing the SAS programs. There were no significant improvements in performance for HHEP, but egg weight, fertility, hatchability and viability were maintained. The lack of response to selection for HHEP was probably due to the following reasons: 1) too many traits were considered in the selection program at the same time, 2) negative genetic correlations existed among the selected traits, 3) strict adherence to a selection scheme was not practiced, 4) most of the traits under selection had low heritabilities, 5) the duration of the study was not long enough, and 6) the population size of strain 6 may not have been large enough. There was a significant decrease in body weight at 365 days (-4.33 ± 0.48, p < 0.0009). This decrease may be because of selection within full-sibs for more refined birds with better conformation as parents of the next generation. There were significant decreases in egg specific gravity at 225 and 450 days, and in Haugh units at 225 days, although Haugh units were increasing when measured at 450 days. The mean h²s for HHEP was 0.45, and the mean h²s for egg production to 273 days was 0.20 and the mean h²d for the same trait was 0.33. The mean h²s and h²d estimates for egg weight at 225 days were 0.60 and 0.50, respectively. The mean h²s and h²d for age at sexual maturity were 0.22 and 0.33, respectively, and those for body weight at 365 days were 0.53 and 0.62, respectively. The mean h²s and h²d for egg specific gravity at 225 were 0.64 and 0.33, respectively while those for Haugh units at 225 days were 0.57 and 0.68, respectively. These estimates were consistent with those found in the literature. The sctual selection differentials showed that selection was positive for egg production, while those for egg weight at 225 days were zero, and those for body weight at 365 days showed that selection was in the downward direction on the sires.
Non-topological solitons in field theories with kinetic self-coupling
Creators: name: Diaz-Alonso, Joaquin
name: Rubiera-Garcia, Diego
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate some fundamental features of a class of non-linear relativistic lagrangian field theories with kinetic self-coupling. We focus our attention upon theories admitting static, spherically symmetric solutions in three space dimensions which are finite-energy and stable. We determine general conditions for the existence and stability of these non-topological soliton solutions. In particular, we perform a linear stability analysis that goes beyond the usual Derrick-like criteria. On the basis of these considerations we obtain a complete characterization of the soliton-supporting members of the aforementioned class of non-linear field theories. We then classify the family of soliton-supporting theories according to the central and asymptotic behaviors of the soliton field, and provide illustrative explicit examples of models belonging to each of the corresponding sub-families. In the present work we restrict most of our considerations to one and many-components scalar models. We show that in these cases the finite-energy static spherically symmetric solutions are stable against charge-preserving perturbations, provided that the vacuum energy of the model vanishes and the energy density is positive definite. We also discuss briefly the extension of the present approach to models involving other types of fields, but a detailed study of this more general scenario will be addressed in a separate publication.
description: 5 pages, 1 figure, revtex4, minor corrections added
DISCO2 STORE Dissemination and Communication Plan
Creators: name: Inna Pravdenko, Lina María Guayacan Carrillo
Publisher: name: Zenodo
Year: 2022
Subjects: dissemination, communication, target audiene, publication

description: The current document outlines the main objectives, target audiences and activities to be carried out by the consortium in order to disseminate the results of the project and promote the action in compliance with the Article 29 and Article 38 of the Grant Agreement. It includes a description of the dissemination and communication strategy, a breakdown of target groups, a list of dissemination and communication tools and channels, an overview of internal organization within the consortium in regard to dissemination and communication activities and the methods or evaluating the impact of the planned activities. The plan was elaborated during the kick-off meeting and will be updated.
title: Axial compression behavior of thin-walled mild steel tubes subjected to axial impact
Creators: name: Tak,  S.K.
name:  Iqbal , M.A.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021

description: The finite element computations were performed on ABAQUS/Explicit solver to study the effect of wall thickness on axial crushing and energy absorption of the mild steel tubes under axial impact. Circular tube (60 mm diameter) and square tube (47.34 mm size) with varying wall thicknesses (1.1, 1.5, 2, 2.5, and 3 mm) were impacted axially by 5 kg projectile. A comparative study has also been carried out on axial compression behavior of tubes with circular and square tubes with equivalent section areas. The constitutive and damage behavior of the mild steel was modelled using the Johnson-Cook material model. The validation of the computational model was carried out by performing the experiments on 60 mm diameter circular tube under the axial impact of 5 kg projectile. The maximum axial compression of the circular and square tubes has been found to be decreased with an increase in the wall thickness of the tubes, however, the absorbed energy does not show any significant influence with the change in the wall thickness of the tubes. The maximum axial compression of the square tubes was found to be higher than the circular tubes for thicknesses 1.1 and 1.5 mm. On the other hand, the axial compression of the circular tubes was found higher at higher thicknesses beyond 1.5 mm.
The PID Want Ads
Creators: name: Global Contributors, Metadata 2020
name: Paglione, Laura
name: Hendricks, Ginny
name: Chodacki, John
Publisher: name: Zenodo
Year: 2021
Subjects: metadata
resource_discovery

description: WANTED: PID for an object that is not too big and not too small. One that provides just the information that I seek, and is in a language that I can understand. Not too old. Accompanied by data and resources. Available in my country. Open access only need apply. What would a PID be without its accompanying metadata? Rich data help fulfill the FAIR promises by making information more easily findable, and by providing clarity on the constraints around being accessible (how?), interoperable (with what?), and reusable (for what purpose?) In this session, we’ll review the 101 of Metadata and its very important relationship to PIDs. And then you’ll try your hand at identifying the metadata needed to help answer the PID Want Ads.
description: Presentation document differs slightly from that used during the conference session. The session was interactive. This document was updated to include the audience responses. See related identifiers for a link to the recorded presentation.
Superexchange interactions in AgMF4 (M = Co, Ni, Cu) polymorphs
Creators: name: Domański, Mateusz A.
name: Grochala, Wojciech
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetic properties of silver(II) compounds have been of interest in recent years. In covalent compounds, the main mechanism of interaction between paramagnetic sites is the superexchange via the connecting ligand. To date, little is known of magnetic interactions between Ag(II) cations and other paramagnetic centres. It is because only a few compounds bearing Ag(II) cation and other paramagnetic transition metal cation are known experimentally. Recently the high-pressure synthesis of ternary silver(II) fluorides with 3d metal cations AgMF4 (M = Co, Ni, Cu) was predicted to be feasible. Here, we investigate the magnetic properties of these compounds in their diverse polymorphic forms. Using well established computational methods we predict superexchange pathways in AgMF4, evaluate coupling constants and calculate the impact of Ag(II) presence on superexchange between the other cations. The results indicate that the low-pressure form of AgCuF4, the only composed of stacked layers as the parent AgF2, would hold mainly Ag-Ag and Cu-Cu superexchange interactions. Upon compression, or with the nickel(II) cation, the Ag-M interactions in AgMF4 intensify, which is emphasized by an increase of Ag-M superexchange coupling constants and Ag-F-M angles. All the strongest Ag-M superexchange pathways are quasi-linear, leading to the formation of antiferromagnetic chains along the crystallographic directions. The impact of Ag(II) on M-M superexchange turns out to be moderate, due to factors connected to the crystal structure.
description: 10 pages, 2 Tables, 3 Figures, plus electronic supplement
From major merger to radio galaxy: low surface-brightness stellar counterpart to the giant HI ring around B2 0648+27
Creators: name: Emonts, B. H. C.
name: Morganti, R.
name: van Gorkom, J. H.
name: Oosterloo, T. A.
name: Brogt, E.
name: Tadhunter, C. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the detection of a low surface-brightness stellar counterpart to an enormous (190 kpc) ring of neutral hydrogen (HI) gas that surrounds the nearby radio galaxy B2 0648+27. This system is currently in an evolutionary stage between major merger and (radio-loud) early-type galaxy. In a previous paper we investigated in detail the timescales between merger, starburst and AGN activity in B2 0648+27, based on its unusual multi-wavelength properties (large-scale HI ring, dominating post-starburst stellar population and infra-red luminosity). In this Research Note we present deep optical B- and V-band imaging that provides further evidence for the merger origin of B2 0648+27. The host galaxy shows a distorted optical morphology and a broad tidal arm is clearly present. A low surface-brightness stellar tail or partial ring curls around more than half the host galaxy at a distance of up to 55 kpc from the centre of the galaxy, following the large-scale, ring-like HI structure that we detected previously around this system. The gas and stars in this ring are most likely tidally expelled material that slowly fell back onto the host galaxy after the merger event. There also appear to be sites of star formation in the HI ring that may have formed within the gaseous tidal debris after the merger. We argue that the observed properties of the gas and stars in B2 0648+27, as well as the apparent time-delay between the merger and the starburst event, may be the logical result of a merger between two gas-rich disk galaxies with a prominent bulge, or of a merger between an elliptical and a gas-rich spiral galaxy. There also appears to be a significant time-delay between the merger/starburst event and the current episode of radio-AGN activity.
description: 4 pages, 2 figures, accepted by Astronomy & Astrophysics (Research Notes)
Cooling flows around cold clouds in the circumgalactic medium: steady-state models & comparison with TNG50
Creators: name: Dutta, Alankar
name: Sharma, Prateek
name: Nelson, Dylan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Cold, non-self-gravitating clumps occur in various astrophysical systems, ranging from the interstellar and circumgalactic medium (CGM), to AGN outflows and solar coronal loops. Cold gas has diverse origins such as turbulent mixing or precipitation from hotter phases. We obtain the analytic solution for a steady pressure-driven 1-D cooling flow around cold, local over-densities, irrespective of their origin. Our solutions describe the slow and steady radiative cooling-driven gas inflow in the saturated regime of nonlinear thermal instability in clouds, sheets and filaments. Such a cooling flow develops when the gas around small clumps undergoes radiative cooling. These small-scale, cold `seeds' are embedded in a large volume-filling hot CGM maintained by feedback. We use a simple two-fluid treatment to include magnetic fields as an additional polytropic fluid. To test the limits of applicability of these analytic solutions, we compare with the gas structure found in and around small-scale cold clouds in the CGM of massive halos in the TNG50 cosmological MHD simulation from the IllustrisTNG suite. Despite qualitative resemblance of the gas structure, we find deviations from steady state profiles generated by our model. Complex geometries and turbulence all add complexity beyond our analytic solutions. We derive an exact relation between the mass cooling rate ($\dot{\rm M}_{\rm cool}$) and the radiative cooling rate ($\dot{\rm E}_{\rm cool}$) for a steady cooling flow. A comparison with the TNG50 clouds shows that this cooling flow relation only applies in a narrow temperature range around $\rm \sim 10^{4.5}$ K where the isobaric cooling time is the shortest. In general, turbulence and mixing, instead of radiative cooling, may dominate the transition of gas between different temperature phases.
description: 11 pages, 10 figures; comments and suggestions are welcome; accepted for publication in MNRAS; Github repo: https://github.com/dutta-alankar/cooling-flow-model.git YouTube: https://www.youtube.com/channel/UCPw9R4ReQqAHq8ArgJhFWLA
Evaluating participants' experience of extended interaction with cutting-edge physics research through the PRiSE 'research in schools' programme
Creators: name: Archer, Martin O.
name: DeWitt, Jennifer
name: Thorley, Charlotte
name: Keenan, Olivia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Physics in schools is distinctly different from, and struggles to capture the excitement of, university research-level work. Initiatives where students engage in independent research linked to cutting-edge physics within their school over several months might help mitigate this, potentially facilitating the uptake of science in higher education. However, how such initiatives are best supported remains unclear and understudied. This paper evaluates a provision framework, `Physics Research in School Environments' (PRiSE), using survey data from participating 14-18 year-old students and their teachers to understand their experience of the programme. The results show that PRiSE appears to provide much more positive experiences than typical university outreach initiatives due to the nature of the opportunities afforded over several months, which schools would not be able to provide without external input. The intensive support offered is deemed necessary, with all elements appearing equally important. Based on additional feedback from independent researchers and engagement professionals, we also suggest the framework could be adopted at other institutions and applied to their own areas of scientific research, something which has already started to occur.
A comparative study of two seed bugs, Geocoris bullatus (Say) and G. discopterus Stål (Hemiptera: Lygaeidae) in the Yukon
Creators: name: Robinson, Jennifer J.
Publisher: name: University of British Columbia
Year: 2010

description: Geocoris bullatus (Say 1831), (Henriptera: Lygaeidae) has been collected and studied across North America but the present work is the first detailed study of western North American G. discopterus Stål 1874. In fact, it has been claimed that G. discopterus is solely a species of the east. As the two species are taxonomically difficult to separate, when they were apparently discovered together at several localities in the southwestern Yukon, a detailed investigation of their systematics and distribution seemed necessary. Species status of Yukon G. bullatus and G. discopterus was established morphologically using standard taxonomic characters. Biological species status was confirmed through breeding experiments. The life cycles of Yukon G. bullatus and G. discopterus were studied and significant differences were discovered in the generation time and phenology. G. discopterus is univoltine and usually overwinters in the adult stage, while G. bullatus is bivoltine and overwinters in the egg stage. Fat body dissections revealed adult G. discopterus fat body size increased toward the end of summer. No such trend was recognized in adult G. bullatus. Total fatty acid levels were assayed for each species, and adult G. discopterus were found to contain higher quantities than G. bullatus, perhaps correlating with the overwintering strategy in G. discopterus An investigation of the habitats occupied by each species was performed through an in depth vegetation analysis. G. discopterus was found to prefer xeric sites situated on south-facing slopes and outwash plains while G. bullatus occupied disturbed mesic roadsides and wastelands. Habitat preference differences coupled with phenological differences may account for the apparent sympatry of these two Geocoris species at some Yukon localities. Comparison of the xeric habitat of G. discopterus to known glacial relict sites in the interiors of Alaska, Yukon and Siberia reveal striking similarities. Late Pleistocene pollen cores also compare favorably with these G. discopterus habitats. In view of this and the disjunct North American distribution of G. discopterus, this species is hypothesized to be a relict species from the late Pleistocene ice age.
N-ification of Forces: A Holographic Perspective on D-brane Model Building
Creators: name: Franco, Sebastian
name: Rodriguez-Gomez, Diego
name: Verlinde, Herman
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study geometric aspects of extensions of the supersymmetric standard model that exhibit a periodic duality cascade. Via the holographic correspondence, the growth of the gauge group rank towards the UV is interpreted as a gradual decompactification transition. We show that this class of models typically develop a duality wall in the UV, and present an efficient method for estimating the hierarchy between the on-set of the cascade and the formation of the wall. As an illustrative example, we study the model introduced by Cascales, Saad and Uranga in [14], which has an known geometric realization in terms of D-branes on an SPP/Z_3 singularity.
description: 47 pages, 10 figures
Experimental observables near a nematic quantum critical point in the pnictide and cuprate superconductors
Creators: name: Xu, Cenke
name: Qi, Yang
name: Sachdev, Subir
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The newly discovered high temperature superconductor SmFeAs(O1-xFx) shows a clear nematic transition where the square lattice of Fe ions has a rectangular distortion. Similar nematic ordering has also been observed in the cuprate superconductors. We provide a detailed theory of experimental observables near such a nematic transition: we calculate the scaling of specific heat, local density of states (LDOS) and NMR relaxation rate 1/T_1T.
description: 7 pages, 7 figures
Quantum Anomalous Hall Effect in Three-dimensional Topological Insulator/Thin-film Ferromagnetic Metal Bilayer Structure
Creators: name: Arimoto, Katsuhiro
name: Koretsune, Takashi
name: Nomura, Kentaro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically show that the three-dimensional (3D) topological insulator (TI)/thin-film ferromagnetic metal (FMM) bilayer structure is possible to be a quantum anomalous Hall (QAH) insulator with a wide global band gap. Studying the band structure and the weight distributions of eigenstates, we demonstrate that the attachment of a metallic thin-film on the 3DTI can shift the topologically non-trivial state into the metal layers due to the hybridization of bands around the original Dirac point. By introducing the magnetic exchange interaction in the thin-film layers, we compute the anomalous Hall conductivity and magnetic anisotropy of the bilayer structure to suggest the appearance of wider gap realizing QAH effect than usual materials, such as magnetically doped thin-films of 3DTI and 3DTI/ferromagnetic insulator heterostructures. Our results indicate that the 3DTI/thin-film FMM bilayer structure may implement the QAH effect even at room temperature, which will pave a way to the experimental realization of other exotic topological quantum phenomena.
description: 9 pages, 5 figures
Infinite products with strongly $B$-multiplicative exponents
Creators: name: Allouche, Jean-Paul
name: Sondow, Jonathan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11A63, 11Y60

description: Let $N_{1,B}(n)$ denote the number of ones in the $B$-ary expansion of an integer $n$. Woods introduced the infinite product $P :=\prod_{n \geq 0} (\frac{2n+1}{2n+2})^{(-1)^{N_{1,2}(n)}}$ and Robbins proved that $P = 1/\sqrt{2}$. Related products were studied by several authors. We show that a trick for proving that $P^2 = 1/2$ (knowing that $P$ converges) can be extended to evaluating new products with (generalized) strongly $B$-multiplicative exponents. A simple example is $$ \prod_{n \geq 0} (\frac{Bn+1}{Bn+2})^{(-1)^{N_{1,B}(n)}} = \frac{1}{\sqrt B}. $$
description: Updated [14] and journal reference
Trichilia hirta ON
Creators: name: García-Gómez, A.
name: Figueroa-Brito, R.
name: García Serrano, L. A.
name: Jiménez-Pérez, A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Sapindales
Meliaceae
Trichilia
Trichilia hirta

description: EFFECT OF THE EXTRACTS OF TRICHILIA HIRTA ON COPITARSIA DECOLORA SURVIVAL
Mean larval survival time was significantly affected by T. hirta bark hexane extracts (Log-Rank Test = 33.43; df = 4; P <0.001; Table 2; Fig. 3a). Larvae fed the 1,500 ppm treatment had the shortest mean survival time; however, this was not significantly different from those fed the 1,000 and 500 ppm treatments. Larval mortality was over 50% except at 100 ppm. The highest cumulative mortality occurred in the 1,500 ppm diet, and no adults were obtained from this treatment.
Mean survival time of C. decolora larvae was not affected by T. hirta bark ethyl acetate extract (Log-Rank Test = 7.227; df = 4; P <0.124). This varied from 28.8 ± 3.4 d at 1,500 ppm treatment to 33.6 ± 1.6 d for the control diet treatment. The highest larval and cumulative mortalities were recorded in the 1,500 ppm treatment, and exceeded 60%.
Trichilia hirta bark acetone extracts significantly affected the mean survival time of C. decolora larvae (Log-Rank Test = 13.886; df = 4; P <0.008; Table 2; Fig. 3b). The shortest mean survival time was recorded in the 1,500 ppm concentration; however, this treatment was significantly different only from the control diet treatment. The highest larval, pupal, and cumulative mortalities were recorded in the 1,000 ppm treatment.
Methanol extract significantly reduced mean larvae survival time (Log-Rank Test = 17.523; df = 4; P <0.002; Table 2; Fig. 3c). Larvae on the 1,500 and 1,000 ppm concentration had the shortest mean survival times and differed only as compared to the control diet treatment. The highest larval, pupal, and cumulative mortalities were recorded in 1,500 ppm treatment.
Aqueous extracts had a significant reduction in mean larvae survival times in all the concentrations as compared to the control diet treatment (Log-Rank Test = 76.205; df = 4; P <0.001; Table 2; Fig. 3d), with the 1,500 ppm treatment the shortest of all. All insects died as larvae before 21 d of age (Fig. 3d).
description: Published as part of García-Gómez, A., Figueroa-Brito, R., García Serrano, L. A. & Jiménez-Pérez, A., 2018, Trichilia (Meliaceae) plants: an important source of biomolecules with insecticidal properties, pp. 470 in Florida Entomologist 101 (3) on page 470, DOI: 10.1653/024.101.0305, http://zenodo.org/record/12685619
The Political Economy of Income Inequality and Redistribution
Creators: name: Jabeen, Sara
Publisher: name: University of Leicester
Year: 2021
Subjects: Uncategorized

description: This dissertation addresses three interlinked questions that revolve around the theoretical finding of Meltzer and Richard (1981) which predicts a monotonic relationship between income inequality and redistribution. Chapter one studies an overlapping-generations political economy where all young, who differ in their productivity, and old agents vote on two tax rates, levied on the young’s income. These tax rates finance social security system and intragenerational income redistribution. We characterise a unique sequential voting equilibrium where both programmes survive if intragenerational income redistribution’s median voter has lower income than generalized mean. We show that a rise in generalised mean income increases the size of social security, decreasing the size of intragenerational income redistribution. We conclude that, unlike the Meltzer and Richard’s (1981) result, monotonicity between intragenerational redistribution and income inequality disappears in a bidimensional policy space. Chapter two analyses the effect of in-group altruism on redistribution. All consumers, who differ in their productivity and belong to different social groups, vote over a redistributive tax rate. We show that in presence of in-group altruism, agents’ preferred tax rate depends on their income, the generalised mean income and on their social groups’ average income. We conclude that rich prefer high, and poor prefer low redistribution, and that the decisive voter may not have necessarily the median income. Chapter three studies how effective tax revenues are allocated to cash versus in-kind transfers. Agents with pretax income differences vote over a tax rate and the allocation of effective tax revenues to in-kind and cash transfers. We find that agents choose only in-kind transfers if the median voter’s has high income and an increase in income inequality increases the equilibrium tax rate. If median voter has sufficiently low income, both transfers are chosen and an increase in income inequality increases the equilibrium tax rate and in-kind transfers.
Photon-mediated Stroboscopic Quantum Simulation of a $\mathbb{Z}_{2}$ Lattice Gauge Theory
Creators: name: Armon, Tsafrir
name: Ashkenazi, Shachar
name: García-Moreno, Gerardo
name: González-Tudela, Alejandro
name: Zohar, Erez
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Quantum simulation of lattice gauge theories (LGTs), aiming at tackling non-perturbative particle and condensed matter physics, has recently received a lot of interest and attention, resulting in many theoretical proposals, as well as several experimental implementations. One of the current challenges is to go beyond 1+1 dimensions, where four-body (plaquette) interactions, not contained naturally in quantum simulating devices, appear. In this Letter, we propose a method to obtain them based on a combination of stroboscopic optical atomic control and the non-local photon-mediated interactions appearing in nanophotonic or cavity QED setups. We illustrate the method for a $\mathbb{Z}_{2}$ lattice Gauge theory. We also show how to prepare the ground state and measure Wilson loops using state-of-the-art techniques in atomic physics.
Trichilia havanensis ON
Creators: name: García-Gómez, A.
name: Figueroa-Brito, R.
name: García Serrano, L. A.
name: Jiménez-Pérez, A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Sapindales
Meliaceae
Trichilia
Trichilia havanensis

description: EFFECT OF THE EXTRACTS OF TRICHILIA HAVANENSIS ON COPITARSIA DECOLORA SURVIVAL
Mean survival times of larvae fed with 1,000 and 1,500 ppm hexane extracts were significantly shorter than on the control diet treatment (Log-Rank Test = 19.26; df = 4; P <0.001; Table 3; Fig. 4). Larval and cumulative mortality increased along with concentration.
None of the ethyl acetate, acetone, methanol, and aqueous extracts of T. havanensis affected the mean larval survival times of C. decolora (Log-Rank Test = 7.819; df = 4; P <0.098; Log-Rank Test = 4.917; df = 4; P <0.296; Log-Rank Test = 7.157; df = 4; P <0.128; and Log-Rank Test = 3.895; df = 4; P <0.42 for ethyl acetate, acetone, methanol, and aqueous extracts, respectively; Table 3). Mean larval survival time varied from 26.9 ± 2.4 to 34.4 ± 0.5 d. Larval mortality oscillated from 16 to 32% and cumulative mortality from 28 to 56%.
description: Published as part of García-Gómez, A., Figueroa-Brito, R., García Serrano, L. A. & Jiménez-Pérez, A., 2018, Trichilia (Meliaceae) plants: an important source of biomolecules with insecticidal properties, pp. 470 in Florida Entomologist 101 (3) on page 470, DOI: 10.1653/024.101.0305, http://zenodo.org/record/12685619
Questions about movement behaviors and emotional changes in toddlers and preschoolers during COVID-19 pandemic. English and Spanish versions.
Creators: name: Aguilar-Farias, Nicolas
name: Toledo-Vargas, Marcelo
name: Martino-Fuentealba, Pia
name: Miranda-Marquez, Sebastian
name: Cortinez-O'Ryan, Andrea
Publisher: name: figshare
Year: 2021
Subjects: subject: 111403 Paediatrics
subject: FOS: Clinical medicine
subject: 111716 Preventive Medicine
subject: FOS: Health sciences

description: Questions in English and Spanish used in study to assess movement behaviors and emotional changes in toddlers and preschoolers during COVID-19 pandemic in Chile.
Effects on Physical and Mental Health and Well-being Associated with Prolonged fires: Evidence Mapping and Syntheses
Creators: name: Morling, Joanne
name: Emery, Heidi
name: Martello, Elisa
name: Wilson, Emma
name: Stewart-Evans, James
name: Aiyelabegan, Fatimah
name: Joseph, Titus
name: Seripenah, Princella
name: Surakshya Dhungana
name: Leonardi-Bee, Jo
name: Prudence Ikechukwu,
name: Dirontsho Koboto
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Medicine and Health Sciences
subject: Mental Health
subject: Physical Health
subject: Prolonged fires
subject: Well-being

description: This mapping review seeks to anwers this reasearch question: What is known about the physical, mental health, and well-being effects associated with prolonged fires?
Surveys of the Galactic Center and the Nature of the Galactic Center Lobe
Creators: name: Law, Casey James
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Galactic center (GC) is a dense and chaotic region filled with unusual sources, such as intense star forming regions, dense star clusters, nonthermal radio filaments, and a massive black hole. The proximity of the GC region makes it an ideal place to study the unusual processes that tend to manifest themselves in Galactic nuclei. This thesis uses single-dish and interferometric radio continuum, radio recombination line, polarized radio continuum, and mid-IR observations to study the wide variety of physical processes seen in the GC region on physical scales from 0.1 to 100 parsecs. These observations provide one of the most sensitive studies of the radio continuum emission in the central 500 parsecs. I also study the properties of nonthermal radio filaments, which can constrain their origin and the structure of the magnetic field in the GC region. The presence of massive star clusters and a massive black hole suggest that starburst and AGN phenomena can manifest themselves in our Galaxy. This thesis explores this possibility by studying a 150-pc-tall, shell-like structure called the Galactic center lobe (GCL). Our observations examine the spectral index, dust emission, polarized continuum emission, and ionized gas throughout the GCL. I find strong evidence supporting the idea that the GCL is a true three-dimensional shell located in the GC region with nested layers of ionized, magnetized, and mid-IR--emitting components. I compare the physical conditions of the GCL to proposed models for its origin and find best agreement with starburst outflows seen in other galaxies, yet consistent with the currently observed pressure and star formation rate in the central tens of parsecs of our Galaxy. (abridged)
description: PhD dissertation at Northwestern University. Figures in this version were modified for astro-ph; original version can be found at http://staff.science.uva.nl/~claw/thesis_claw.pdf
Analiza mikrostrija na gleđi ljudskih zuba iz perioda mezolitsko-neolitske tranzicije sa teritorije centralnog Balkana i južnog dela Panonske nizije
Creators: name: Marković, Jelena
name: Romero, Alejandro
name: Stefanović, Sofija
Publisher: name: Zenodo
Year: 2019
Subjects: micro-striations
teeth
Neolithic transition
Serbia

description: Jedna od najznačajnijih promena u ljudskoj prošlosti desila se u periodu mezolitsko – neolitske tranzicije, kada ljudi sa lovačko-sakupljačkog prelaze na sedelački način života i bavljenje poljoprivredom. Ovaj proces naziva se neolitska demografska tranzicija i značajno je uticao na biologiju ljudi i njihovu ishranu. Veliki potencijal za razumevanje ovih promena predstavlja analiza zuba koja omogućuje da saznamo npr. stepen abrzivnosti hrane, prisustvo proteina u ishrani na koje ukazuje zubni kamenac ili ugljenih hidrata koji utiču na pojavu karijesa. Pored makroskopskih metoda, postoje i mikroskopske analize zuba poput proučavanja mikrostrija na gleđi zuba, koje, takođe, pružaju značajan uvid u način ishrane mezolitsko-neolitskih zajednica. Mikrostrije nastaju kao posledica procesa mastikacije hrane. Naime, različite vrste namirnica sadrže drugačije abrazivne čestice koje čovek unosi u organizam zajedno sa hranom. Tako se, na primer, u biljkama nalaze fitoliti, na koži ribe silikatne čestice, a u mlevenom brašnu čestice kamena, koje sve mogu ostaviti mikroskopski vidljive tragove na zubima.

U ovom radu će biti prikazani preliminarni rezultati analize mikrostirija kod 40 individua iz perioda od 9500. do 5500 g. p.n.e., koje potiču sa teritorije Đerdapske klisure, južnog dela Panonske nizije i Šumadije. Za potrebe analize mikrostrija izrađeni su silikonski kalupi, pomoću kojih su napravljene replike zuba od epoksi smole. Dobijene replike analizirane su posmatranjem pod skenirajućim elektronskim mikroskopom.

Preliminarni rezultati pokazali su da postoji značajna razlika u obrascima mikrostrija između mezolitskih i neolitskih zuba. Na mezolitskim zubima uočeni su kompleksniji obrasci sa većim brojem mikrostrija, što upućuje na zaključak da su se ljudi u mezolitu hranili mnogo abrazivnijom hranom od ljudi u neolitu. Ovakav rezultat može biti rezultat promene u vrsti i načinu obrade hrane u neolitu.
Topological Photonics on a Small Scale
Creators: name: Zhirihin, Dmitry V.
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The study of topological phases of light suggests novel opportunities for creating robust optical structures and on-chip photonic devices which are immune against scattering losses and structural disorder. However, many recent demonstrations of topological effects in optics employ structures with relatively large scales. Here we discuss the physics and realisation of topological photonics on small scales, with the dimensions often smaller or comparable with the wavelength of light. We highlight the recent experimental demonstrations of small-scale topological states based on arrays of resonant nanoparticles and discuss a novel photonic platform employing higher-order topological effects for creating subwavelength highly efficient topologically protected optical cavities. We pay a special attention to the recent progress on topological polaritonic structures and summarize with our vision on the future directions of nanoscale topological photonics and its impact on other fields.
description: 32 pages, 5 figures
Target atmospheric CO2: Where should humanity aim?
Creators: name: Hansen, J.
name: Sato, M.
name: Kharecha, P.
name: Beerling, D.
name: Berner, R.
name: Masson-Delmotte, V.
name: Pagani, M.
name: Raymo, M.
name: Royer, D. L.
name: Zachos, J. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Paleoclimate data show that climate sensitivity is ~3 deg-C for doubled CO2, including only fast feedback processes. Equilibrium sensitivity, including slower surface albedo feedbacks, is ~6 deg-C for doubled CO2 for the range of climate states between glacial conditions and ice-free Antarctica. Decreasing CO2 was the main cause of a cooling trend that began 50 million years ago, large scale glaciation occurring when CO2 fell to 450 +/- 100 ppm, a level that will be exceeded within decades, barring prompt policy changes. If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted, paleoclimate evidence and ongoing climate change suggest that CO2 will need to be reduced from its current 385 ppm to at most 350 ppm. The largest uncertainty in the target arises from possible changes of non-CO2 forcings. An initial 350 ppm CO2 target may be achievable by phasing out coal use except where CO2 is captured and adopting agricultural and forestry practices that sequester carbon. If the present overshoot of this target CO2 is not brief, there is a possibility of seeding irreversible catastrophic effects.
description: 20 pages, 7 figures; final version accepted by Open Atmospheric Science Journal; supporting article separately submitted to arXiv as "Target atmospheric CO2: Supporting material", arxiv:0804.1135
Questions about movement behaviors and emotional changes in toddlers and preschoolers during COVID-19 pandemic. English and Spanish versions.
Creators: name: Aguilar-Farias, Nicolas
name: Toledo-Vargas, Marcelo
Publisher: name: figshare
Year: 2021
Subjects: subject: 111403 Paediatrics
subject: FOS: Clinical medicine
subject: 111716 Preventive Medicine
subject: FOS: Health sciences

description: Questions in English and Spanish used in study to assess movement behaviors and emotional changes in toddlers and preschoolers during COVID-19 pandemic in Chile.
title: Multi-step dilatational inclusion in an elastically isotropic cylinder
Creators: name: Kolesnikova , A.L.
name: Romanov, A.E.
name: Gutkin, M. Yu.
name: Bougrov , V.E.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021

description: We consider an elastic inclusion in a cylinder with isotropic materials properties. The inclusion possesses a multi-step dependence of the dilatational eigenstrain along the cylinder axis. Basing on the solution for the trace of the stress tensor of the dilatational inclusion with sharp boundaries (single-step inclusion) the stored elastic energy of the multi-step inclusion is determined and analyzed. Then, the found analytical solution for the inclusion energy is used to investigate the energy properties of the transition region between the cylinder domains with a constant level of dilatational eigenstrain. The application of the obtained results to the relevant physical problems of mechanical behavior of hybrid nanodisk/nanowire (ND/NW) semiconductor heterostructures is discussed.
Tests of Relativistic Gravity in Space: Recent Progress and Future Directions
Creators: name: Turyshev, Slava G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We review the foundations of Einstein's general theory of relativity, discuss recent progress in the tests of relativistic gravity, and present motivations for new generation of high-accuracy gravitational experiments. We discuss the advances in our understanding of fundamental physics anticipated in the near future and evaluate discovery potential of the recently proposed gravitational experiments.
description: 18 pages, 9 figures, invited talk given at the "Atomic Clocks and Fundamental Constants - ACFC 2007, Bad Honnef 2007; to appear in EPJ Special Topics
Rich Data Service & DDI
Creators: name: Heus, Pascal
name: Decarlo, Andrew
Publisher: name: Zenodo
Year: 2021

description: Launched in 2020, MTNA's Rich Data Services (RDS) (https://www.richdataservices.com) offers a comprehensive solution for the concurrent publication of data and metadata as a service through a modern REST API. The platform comes equipped with three web applications to enable the ability to manage content, interactively access record level data, and rapidly create aggregated tables. The RDS API provides the foundation needed to build rich web or desktop based data applications, access data directly from analytical and development environments like R, Python, SAS, Stata, C++, or Java, or for machine learning purposes. Open source libraries and multiple forms of documentation are available to developers and data scientists to rapidly leverage the API. The RDS Open Data Packaging service further caters to the needs of users who prefer to work with the (meta)data offline. This provides the option to download the data in various text formats, alongside with scripts/syntax files, PDF documentation, or DDI metadata, enabling immediate reuse and minimizing wrangling. From its inception, RDS leveraged DDI for loading metadata and as an export option. The latest version adds DDI-C and schema.org endpoints on each data product, providing easy access to metadata in standard formats. These latest features further facilitate alignment on GOFAIR recommendations, linked data integration, metadata harvesting, or discovery through Google Data Search. Finally, RDS is being increasingly recognized as a potential alternative to Nesstar Server. Popular amongst the DDI community, Nesstar has for over two decades been instrumental in the establishment of the standard, but unfortunately is no longer being actively maintained. Migration from Nesstar to RDS can mostly be automated and is a smooth and natural transition. This short presentation will provide a refresher on what RDS can do for you, highlight the platform DDI aspects, and briefly demo the latest features and capabilities.