cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gas Metallicity in the Narrow-Line Regions of High-Redshift Active Galactic Nuclei
Creators: name: Nagao, Tohru
name: Maiolino, Roberto
name: Marconi, Alessandro
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze optical (UV rest-frame) spectra of X-ray selected narrow-line QSOs at redshift 1.5 < z < 3.7 found in the Chandra Deep Field South and of narrow-line radio galaxies at redshift 1.2 < z < 3.8 to investigate the gas metallicity of the narrow-line regions and their evolution in this redshift range. Such spectra are also compared with UV spectra of local Seyfert 2 galaxies. The observational data are inconsistent with the predictions of shock models, suggesting that the narrow-line regions are mainly photoionized. The photoionization models with dust grains predict line flux ratios which are also in disagreement with most of the observed values, suggesting that the high-ionization part of the narrow-line regions (which is sampled by the available spectra) is dust-free. The photoionization dust-free models provide two possible scenarios which are consistent with the observed data: low-density gas clouds (n < 10^3 cm^-3) with a sub-solar metallicity (0.2 < Z/Z_sun < 1.0), or high-density gas clouds (n ~ 10^5 cm^-3) with a wide range of gas metallicity (0.2 < Z/Z_sun < 5.0). Regardless of the specific interpretation, the observational data do not show any evidence for a significant evolution of the gas metallicity in the narrow-line regions within the redshift range 1.2 < z < 3.8. Instead, we find a trend for more luminous active galactic nuclei to have more metal-rich gas clouds (luminosity-metallicity relation), which is in agreement with the same finding in the studies of the broad-line regions. The lack of evolution for the gas metallicity of the narrow-line regions implies that the major epoch of star formation in the host galaxies of these active galactic nuclei is at z > 4.
description: 16 pages, 12 figures, submitted to Astronomy and Astrophysics
Water Vapor around Sgr B2
Creators: name: Cernicharo, J.
name: Goicoechea, J. R.
name: Pardo, J. R.
name: Ramos, A. Asensio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have conducted a study combining H2O lines in two spectral regions. First, Infrared Space Observatory observations of several H2O thermal lines seen in absorption toward Sgr B2(M) at a spectral resolution of 35 kms^-1 have been analyzed. Second, an IRAM-30m telescope map of the para-H2O 3_13-2_20 line at 183.31 GHz, seen in emission, has also been obtained and analyzed. The H2O lines seen in absorption are optically thick and are formed in the outermost gas of the condensations in front of the far-IR continuum sources. They probe a maximum visual extinction of ~5 to 10 mag. Radiative transfer models indicate that these lines are quite insensitive to temperature and gas density, and that IR photons from the dust play a dominant role in the excitation of the involved H2O rotational levels. The water vapor abundance in the region is (1-2)x10^-5. The relatively low H2O/OH abundance ratio in the region, 2-4, is a signature of UV photon dominated surface layers traced by far-IR observations.
description: 17 pages, 10 figures (2 of them bitmapped to low resolution), 2 tables, accepted in ApJ, 2006, January 12
THE EVOLUTION OF CHINA'S RURAL LABOR MARKETS DURING THE REFORMS
Creators: name: De Brauw, Alan
name: Huang, Jikun
name: Rozelle, Scott
name: Zhang, Linxiu
name: Zhang, Yigang
name: De Brauw, Alan
name: Huang, Jikun
name: Rozelle, Scott
name: Zhang, Linxiu
name: Zhang, Yigang
Publisher: name: Unknown
Year: 2002
Subjects: Labor and Human Capital

description: This paper contributes to the assessment of China's rural labor markets, while paying attention to whether these markets are developing in a manner conducive to the nation's modernization. According to our household survey, we find that the rapid increase in off-farm employment has continued and accelerated during the late 1990s. Our analysis shows that migration has become the most prevalent off-farm activity; has become dominated by young and better educated workers; expanded most rapidly in areas that are relatively well-off; and begun to draw workers from portions of the population, such as women, that earlier had been excluded from participation.
Electrical initialization and manipulation of electron spins in an L-shaped strained n-InGaAs channel
Creators: name: Kato, Y. K.
name: Myers, R. C.
name: Gossard, A. C.
name: Awschalom, D. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: An L-shaped strained n-InGaAs channel is used to polarize and subsequently rotate electron spins solely by means of electric fields. Precession of electrically-excited spins in the absence of applied magnetic fields is directly observed by Kerr rotation microscopy. In addition, in-plane and out-of-plane components of the spin polarization in the channel are simultaneously imaged.
description: 4 pages, 3 figures
Current induced transverse spin-wave instability in thin ferromagnets: beyond linear stability analysis
Creators: name: Adam, Shaffique
name: Polianski, Mikhail L.
name: Brouwer, Piet W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A sufficiently large unpolarized current can cause a spin-wave instability in thin nanomagnets with asymmetric contacts. The dynamics beyond the instability is understood in the perturbative regime of small spin-wave amplitudes, as well as by numerically solving a discretized model. In the absence of an applied magnetic field, our numerical simulations reveal a hierarchy of instabilities, leading to chaotic magnetization dynamics for the largest current densities we consider.
description: 14 pages, 10 figures; revtex4
A study of irreducible components of Springer fibers using quiver varieties
Creators: name: Im, Mee Seong
name: Lai, Chun-Ju
name: Wilbert, Arik
Publisher: name: arXiv
Year: 2020
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: It is a remarkable theorem by Maffei--Nakajima that the Slodowy variety, which is a subvariety of the resolution of the nilpotent cone, can be realized as a Nakajima quiver variety of type A. However, the isomorphism is rather implicit as it takes to solve a system of equations in which the variables are linear maps. In this paper, we construct solutions to this system under certain assumptions. This establishes an explicit and efficient way to compute the image of a complete flag contained in the Slodowy variety under the Maffei--Nakajima isomorphism and describe these flags in terms of quiver representations. As Slodowy varieties contain Springer fibers naturally, we can use these results to provide an explicit description of the irreducible components of two-row Springer fibers in terms of a family of kernel relations via quiver representations.
description: 23 pages, 5 figures. v2: reference to the accompanying paper (arXiv:2011.13138) added. Note: This paper proves a stronger version of the first goal in the manuscript arXiv:1910.03010 (not intended for publication), and hence has a text overlap. v3: to appear in Journal of Algebra. Title is changed. Lemma 4.1 is clarified
Forecasting in the Presence of Level Shifts
Creators: name: Smith, Aaron D.
name: Smith, Aaron D.
Publisher: name: Unknown
Year: 2004
Subjects: Financial Economics
Research Methods/ Statistical Methods

description: This article addresses the problem of forecasting time series that are subject to level shifts. Processes with level shifts possess a nonlinear dependence structure. Using the stochastic permanent breaks (STOPBREAK) model, I model this nonlinearity in a direct and flexible way that avoids imposing a discrete regime structure. I apply this model to the rate of price inflation in the United States, which I show is subject to level shifts. These shifts significantly affect the accuracy of out-of-sample forecasts, causing models that assume covariance stationarity to be substantially biased. Models that do not assume covariance stationarity, such as the random walk, are unbiased but lack precision in periods without shifts. I show that the STOPBREAK model outperforms several alternative models in an out-of-sample inflation forecasting experiment.
Universal Aspects of Vortex Reconnections across the BCS-BEC Crossover
Creators: name: Tylutki, Marek
name: Wlazłowski, Gabriel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Reconnecting vortices in a superfluid allow for the energy transfer between different length scales and its subsequent dissipation. The present picture assumes that the dynamics of a reconnection is driven mostly by the phase of the order parameter, and this statement can be justified in the case of Bose-Einstein Condensates (BECs), where vortices have a simple internal structure. Therefore, it is natural to postulate that the reconnection dynamics in the vicinity of the reconnection moment is universal. This expectation has been confirmed in numerical simulations for BECs and experimentally for the superfluid ${}^4$He. Not much has been said about this relation in the context of Fermi superfluids. In this article we aim at bridging this gap, and we report our findings, which reveal that the reconnection dynamics conforms with the predicted universal behaviour across the entire BCS-BEC crossover. The universal scaling also survives for spin-imbalanced systems, where unpaired fermions induce a complex structure of the colliding vortices.
description: 7 pages, 4 figures; accompanying movies are available at http://wlazlowski.fizyka.pw.edu.pl/supplement/sm-vr/
Solenostoma gracillimum fm. crenulatum Bakalin, Polish Bot. J.
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Jungermanniales
Solenostomataceae
Solenostoma
Solenostoma gracillimum
Solenostoma gracillimum f. crenulatum (mitt.) bakalin,

description: Solenostoma gracillimum f. crenulatum (Mitt.) Bakalin,
Polish Bot. J. 57 (1): 141, 2012 (see Bakalin 2012). BASIONYM: Solenostoma crenulatum Mitt., J. Linn. Soc., Bot. 8: 51, 1865 (see Mitten 1865).
NOTE: Bakalin specified Jungermannia crenulata Sm., ICN Art. 53.1; hom. illeg. [non Schmidel 1760: 20] as basionym. The correct basionym as specified above is a nomen novum for Jungermannia crenulata Sm. (c.f. ICN Art. 58.1). We do not think that this makes the new taxon invalid.
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 74, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
In vitro-in silico modelling approach to rationally design simple and versatile drug delivery systems. Molecular Dynamics trajectories and topology files.
Creators: name: Bouzo, Belén L.
name: Calvelo, Martín
name: Martín-Pastor, Manuel
name: García-Fandiño, Rebeca
name: Fuente, María De La
Publisher: name: Zenodo
Year: 2020

description: As a part of a work ("In Vitro–In Silico Modeling Approach to Rationally Designed Simple and Versatile Drug Delivery Systems", J. Phys. Chem. B 2020, 124, 28, 5788–5800. DOI:10.1021/acs.jpcb.0c02731) describing a new type of biocompatible Vitamin E - Sphingomyelin Nanosystems (VSNs) prepared by spontaneous emulsification, Molecular Dynamics (MD) simulations using both Coarse Grained (CG) and All-Atom (AT) resolution have been carried out. Here, the resulting trajectories, as well as the topologies used for performing those simulationes, are available for the free use of the community. The resulting publication can be found in the following link: https://pubs.acs.org/doi/abs/10.1021/acs.jpcb.0c02731 For any question/suggestion, please contact martin.calvelo@gmail.com
description: All calculations have been carried out in the "Centro de Supercomputación de Galicia" (CESGA). RGF thanks Spanish Government MINECO for the Ramon y Cajal (RYC- RYC-2016-20335) contract and the RTI2018-098795-A-I00 project. MCS thanks to Xunta de Galicia for a predoctoral fellowship. MF also thanks to Carlos III Health Institute / FEDER for the CP12/00350 and PI15/000828 projects.
EFFECTIVE COSTS AND CHEMICAL USE IN U.S. AGRICULTURAL PRODUCTION: BENEFITS AND COSTS OF USING THE ENVIRONMENT AS A "FREE" INPUT
Creators: name: Morrison Paul, Catherine J.
name: Ball, V. Eldon
name: Felthoven, Ronald G.
name: Nehring, Richard F.
name: Morrison Paul, Catherine J.
name: Ball, V. Eldon
name: Felthoven, Ronald G.
name: Nehring, Richard F.
Publisher: name: Unknown
Year: 2000
Subjects: Environmental Economics and Policy
Farm Management

description: This study uses a cost-function-based model of production processes in U.S. agriculture to represent producers' input and output decisions, and the implied costs of reductions in risk associated with leaching and runoff from agricultural chemical use. The model facilitates evaluation of the statistical significance of measured shadow values for "bad" outputs, and their input- and output-specific components, with a focus on the impacts on pesticide demand and its quality and quantity aspects. The shadow values of risk reduction are statistically significant, and imply increased demand for effective pesticides over time that stem largely from improvements in quality due to embodied technology, and that vary substantively by region.
Aeolian transport layer
Creators: name: Almeida, M. P.
name: Andrade, J. S.
name: Herrmann, H. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate the airborne transport of particles on a granular surface by the saltation mechanism through numerical simulation of particle motion coupled with turbulent flow. We determine the saturated flux $q_{s}$ and show that its behavior is consistent with a classical empirical relation obtained from wind tunnel measurements. Our results also allow to propose a new relation valid for small fluxes, namely, $q_{s}=a(u_{*}-u_{t})^α$, where $u_{*}$ and $u_{t}$ are the shear and threshold velocities of the wind, respectively, and the scaling exponent is $α\approx 2$. We obtain an expression for the velocity profile of the wind distorted by the particle motion and present a dynamical scaling relation. We also find a novel expression for the dependence of the height of the saltation layer as function of the wind velocity.
description: 4 pages, 4 figures
MANAGEMENT STRATEGIES FOR INDONESIAN SMALL-HOLDER RUBBER PRODUCTION IN SOUTH SUMATRA: A BIOECONOMIC ANALYSIS
Creators: name: Purnamasari, Ririn S.
name: Cacho, Oscar J.
name: Simmons, Phil
name: Purnamasari, Ririn S.
name: Cacho, Oscar J.
name: Simmons, Phil
Publisher: name: Unknown
Year: 1999
Subjects: subject: Production Economics
subject: Risk and Uncertainty
subject: Bioeconomics
subject: Stochastic analysis
subject: Rubber
subject: Indonesia

description: A simplified version of the BEAM Rubber Agroforestry Model is embedded in a dynamic economic model to examine the impact of uncertainty about prices and climate on decision variables. Solutions, in terms of optimal levels for decision variables are found using a Monte Carlo stochastic framework. These solutions were used to derive risk-efficient frontiers corresponding to different levels of the decision variables. The results underline the importance of including uncertainty in dynamic bioeconomic systems since profits under uncertainty turned out to be quite different from those obtained with prices and climate assumed to be constant.
Deep Learning in Diabetic Foot Ulcers Detection: A Comprehensive Evaluation
Creators: name: Yap, Moi Hoon
name: Hachiuma, Ryo
name: Alavi, Azadeh
name: Brungel, Raphael
name: Cassidy, Bill
name: Goyal, Manu
name: Zhu, Hongtao
name: Ruckert, Johannes
name: Olshansky, Moshe
name: Huang, Xiao
name: Saito, Hideo
name: Hassanpour, Saeed
name: Friedrich, Christoph M.
name: Ascher, David
name: Song, Anping
name: Kajita, Hiroki
name: Gillespie, David
name: Reeves, Neil D.
name: Pappachan, Joseph
name: O'Shea, Claire
name: Frank, Eibe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: There has been a substantial amount of research involving computer methods and technology for the detection and recognition of diabetic foot ulcers (DFUs), but there is a lack of systematic comparisons of state-of-the-art deep learning object detection frameworks applied to this problem. DFUC2020 provided participants with a comprehensive dataset consisting of 2,000 images for training and 2,000 images for testing. This paper summarises the results of DFUC2020 by comparing the deep learning-based algorithms proposed by the winning teams: Faster R-CNN, three variants of Faster R-CNN and an ensemble method; YOLOv3; YOLOv5; EfficientDet; and a new Cascade Attention Network. For each deep learning method, we provide a detailed description of model architecture, parameter settings for training and additional stages including pre-processing, data augmentation and post-processing. We provide a comprehensive evaluation for each method. All the methods required a data augmentation stage to increase the number of images available for training and a post-processing stage to remove false positives. The best performance was obtained from Deformable Convolution, a variant of Faster R-CNN, with a mean average precision (mAP) of 0.6940 and an F1-Score of 0.7434. Finally, we demonstrate that the ensemble method based on different deep learning methods can enhanced the F1-Score but not the mAP.
description: 19 pages, 18 figures, 10 tables
ИСПОЛЬЗОВАНИЕ ОБРАЗОВАТЕЛЬНЫХ РЕСУРСОВ НА УРОКАХ БИОЛОГИИ
Creators: name: Гаибназарова, Феруза
name: Сафарова, Наргиза
Publisher: name: Zenodo
Year: 2024

description: Рассматриваются возможность и опыт применения ИКТ (информационно-коммуникационных технологий) в самостоятельной деятельности учащихся, прежде всего, использование ресурсов Интернета при подготовке домашних заданий на уроках зоологии по теме «Тип Членистоногие».
MPEC 2024-A122 : 2024 AZ2
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 AZ2

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Export Performance in South Pacific Countries Comparatively Well Endowed with Natural Resources: Solomon Islands and Vanuatu, 1960 to 1999
Creators: name: Fleming, Euan M.
name: Blowes, Anita
name: Fleming, Euan M.
name: Blowes, Anita
Publisher: name: Unknown
Year: 2003
Subjects: subject: International Relations/Trade
subject: export performance
subject: stochastic dominance
subject: Solomon Islands
subject: Vanuatu

description: Stochastic dominance analysis was used to assess export performance in two Melanesian countries of similar size and structure that are comparatively well endowed with natural resources: Solomon Islands and Vanuatu. Total export values increased over the study period in Solomon Islands, brought about by a significant increase in the value of non-agricultural resource exports. Agricultural exports showed small increases but the average annual rate of growth was only 1.3 per cent for agricultural export values compared with 10.7 per cent in non-agricultural export values. The record of commodity export performance in Vanuatu over the study period was less impressive, with a small average annual decline in total export values. This decline was caused by agricultural export values falling by 1.5 per cent per annum although it showed signs of abating in the final decade of the study period. Results suggest that both countries are capable of achieving sustainable economic development, given their generous natural resource endowments, but many factors may militate against this achievement, as witnessed by the current political unrest and crisis in public finance in Solomon Islands.
Hybrid Textures of Neutrino Mass Matrix
Creators: name: Kaneko, S.
name: Sawanaka, H.
name: Tanimoto, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present analyses of the sixty hybrid textures of neutrino mass matrix, which have an equality of matrix elements and one zero. These textures are possibly derived in the models with discrete flavor symmetry. Only six textures among sixty ones are excluded by the present experimental data. Since there are many textures which give similar predictions, the textures are classified based on the numerical results. The neutrinoless double beta decay is also examined in these textures. Our results suggest that there remain still rich structures of the neutrino mass matrix in the phenomenological point of view.
description: 4 pages, no figures, talk presented at HEP2005, July 21 - 27, 2005, Lisbon, Portugal
Solenostoma major Bakalin et Vilnet, Bryologist
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Jungermanniales
Solenostomataceae
Solenostoma
Solenostoma major

description: Solenostoma major (S.Hatt.) Bakalin et Vilnet,
Bryologist 115 (4): 574, 2012 (see Bakalin &Vilnet 2012).BASIONYM: Jungermannia monticola f. major S.Hatt., J. Hattori Bot. Lab. 3: 8, 1948 (see Hattori 1948a).
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 74, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
Quantum critical 5f-electrons avoid singularities in U(Ru,Rh)2Si2
Creators: name: Silhanek, A. V.
name: Harrison, N.
name: Batista, C. D.
name: Jaime, M.
name: Lacerda, A.
name: Amitsuka, H.
name: Mydosh, J. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present specific heat measurements of 4% Rh-doped U(Ru,Rh)2Si2 at magnetic fields above the proposed metamagnetic transition field Hm~34 T, revealing striking similarities to the isotructural Ce analog CeRu2Si2, suggesting that strongly renormalized hybridized band models apply equally well to both systems. The vanishing bandwidths as H --> Hm are consistent with a putative quantum critical point close to Hm. The existence of a phase transition into an ordered phase in the vicinity of Hm for 4% Rh-doped U(Ru,Rh)2Si2, but not for CeRu2Si2, is consistent with a stronger super-exchange in the case of the U 5-f system, with irreversible processes at the transition revealing a strong coupling of the 5f orbitals to the lattice, most suggestive of orbital or electric quadrupolar order.
description: 4 pages, 4 figures
ECONOMIC IMPACTS OF REGULATIONS TO PRESERVE NATIVE WOODLAND ON PRIVATE PROPERTY: A CASE STUDY IN THE HUNTER VALLEY OF NEW SOUTH WALES
Creators: name: Scott, Robert R.
name: Sinden, Jack A.
name: Scott, Robert R.
name: Sinden, Jack A.
Publisher: name: Unknown
Year: 1999
Subjects: subject: Land Economics/Use
subject: Native vegetation
subject: environmental preservation
subject: opportunity cost.

description: Australian policies to preserve native vegetation on farms rest on mandatory regulations without compensation, whereas policies in most OECD countries rest on voluntary conservation with compensation. In New South Wales, the Native Vegetation Conservation Act 1998 restricts farmers from clearing native vegetation on their own freehold land, and offers no compensation. The Act may therefore impose opportunity costs, or losses in income, on landholders. These opportunity costs are estimated for a case study property in the Hunter Valley of New South Wales, and these results are then generalised to assess the broad trade-offs between development and preservation. The losses in income appear to vary between 5 and 10 per cent of annual income, depending on livestock prices. The flow of these losses over time appears to total some $26m for all properties of this kind in the immediate region. In addition to imposition of these direct opportunity costs, the regulations hinder land sales and so hinder adjustment by landholders to changing conditions.
A Topic Coverage Approach to Evaluation of Topic Models
Creators: name: Korenčić, Damir
name: Ristov, Strahil
name: Repar, Jelena
name: Šnajder, Jan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: H.3.3; I.5.4; I.2.7

description: Topic models are widely used unsupervised models capable of learning topics - weighted lists of words and documents - from large collections of text documents. When topic models are used for discovery of topics in text collections, a question that arises naturally is how well the model-induced topics correspond to topics of interest to the analyst. In this paper we revisit and extend a so far neglected approach to topic model evaluation based on measuring topic coverage - computationally matching model topics with a set of reference topics that models are expected to uncover. The approach is well suited for analyzing models' performance in topic discovery and for large-scale analysis of both topic models and measures of model quality. We propose new measures of coverage and evaluate, in a series of experiments, different types of topic models on two distinct text domains for which interest for topic discovery exists. The experiments include evaluation of model quality, analysis of coverage of distinct topic categories, and the analysis of the relationship between coverage and other methods of topic model evaluation. The paper contributes a new supervised measure of coverage, and the first unsupervised measure of coverage. The supervised measure achieves topic matching accuracy close to human agreement. The unsupervised measure correlates highly with the supervised one (Spearman's $ρ\geq 0.95$). Other contributions include insights into both topic models and different methods of model evaluation, and the datasets and code for facilitating future research on topic coverage.
description: Final version accepted for publication in IEEE Access (https://doi.org/10.1109/ACCESS.2021.3109425); Contributions unchanged, results augmented with the analysis of the models' precision and recall and the analysis of the measures' running time; Improved description of the contributions; Improved future work
Explaining Market and Enterprise Structures in the Food Marketing Chain
Creators: name: Nightingale, John J.
name: Piggott, Roley R.
name: Griffith, Garry R.
name: Nightingale, John J.
name: Piggott, Roley R.
name: Griffith, Garry R.
Publisher: name: Unknown
Year: 2002
Subjects: subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business

description: Our objective in this paper is to review the origins and main points of theories of firm behaviour used in economic theory and strategic management, with particular reference to the food marketing chain. We argue that while neoclassical economics may provide a robust framework in which to understand market outcomes for long run atomistic competition, such as conventionally modelled by agricultural economists, modern developments in both economics and strategic management add substantially to our ability to explain firm and market structures in the food marketing chain.
Solenostoma montanum Vana, Phytotaxa
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Jungermanniales
Solenostomataceae
Solenostoma
Solenostoma montanum

description: Solenostoma montanum (Steph.) Váňa,
Phytotaxa 65: 44, 2012 (see Váňa et al. 2012c). BASIONYM: Nardia montana Steph., Hedwigia 28 (3): 164, 1889 (see Stephani 1889).
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 74, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
The correlates of coronary angioplasty patients’ perceptions of their risk for cardiovascular disease progression and death
Creators: name: Kingsbury, Kori Jo
Publisher: name: University of British Columbia
Year: 2009

description: In the context of cardiovascular disease, health initiatives and efforts are aimed at increasing awareness of those "at risk" about the causes of heart disease and the lifestyle behaviours necessary to reduce risks. Despite being informed of their "at risk" status, many individuals do not implement the necessary changes to their lifestyle to mitigate their cardiovascular risk. This may be explained, in part,(by a mismatch between an individual's perception of their risk and their actual risk. Individuals who have optimistic or pessimistic biases about their true cardiovascular risk may be less likely to adopt heart healthful lifestyle behaviours. Using a cross-sectional, correlational design, 134 patients undergoing coronary angioplasty were asked about their perceptions of risk of cardiovascular disease progression and death. To determine the accuracy of these perceptions, the respondents' subjective perceptions were compared to objective estimates of their risk relative to the severity of their cardiac disease. To understand correlates of these perceptions, respondents were asked detailed questions about their cardiac history, cardiovascular risk factors, current lifestyle behaviours, and sociodemographic characteristics. Once the level of accuracy for the risk perceptions was established (accurate, or optimistically or pessimistically biased), data were analysed to determine the relationship between level of accuracy and the adoption of healthful lifestyle behaviours. The results of this study revealed that the respondents' perceptions varied in the level of accuracy: 44.3% were accurate, 32.7% were optimistic, and 23.0% were pessimistic. Age and duration of diagnosis emerged independently as the most significant factors contributing to level of accuracy. The respondents with accurate perceptions of their risk had the shortest duration of diagnosis; those with the longest duration of diagnosis were most likely to be pessimistic. Younger respondents were more accurate in their risk perceptions; older respondents were most likely to be optimistic. Level of accuracy was not related to the individual adopting healthful lifestyle behaviours. Respondents holding accurate perceptions of their risk were neither more nor less likely than respondents holding optimistically or pessimistically biased perceptions to adhere to healthful lifestyle behaviours associated with reduced risk for cardiovascular disease.
NeIC E3DDS Project Deliverable 4 "The synergies with the NeIC NT1 operations"
Creators: name: Brown, Simon
name: Enell, Carl-Fredrik
name: Häggström, Ingemar
name: Hellgren, Harri
name: Jonsson, Dan-Johan
name: Lukkarinen, Ari
name: Tjulin, Anders
name: Wadenstein, Mattias
name: Westman, Assar
name: White, John
Publisher: name: Zenodo
Year: 2020

description: NeIC E3DDS project Deliverable 4 that describes the possible scenarios of deploying the EISCAT_3D e-infrastructure services with NeIC NT1 and other partners. The document details the services for EISCAT_3D operations and those suitable or not to be run by NeIC NT1 or other partners. The most beneficial deployment scenario is identified according to the factors considered in this document: Risks; Benefits; Cost Efficiency; Reliability; User Satisfaction. Steps to remedy the negative aspects of the most beneficial scenario are presented including the Service Level Agreements (SLAs) needed, service management(e.g. FitSM) required and the division of responsibilities. Estimates of the staffing effort required to run the EISCAT_3D services are presented as well as the effort to run NeIC NT1.
Solenostoma ochotense Bakalin et Vilnet, Bryologist
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Jungermanniales
Solenostomataceae
Solenostoma
Solenostoma ochotense

description: Solenostoma ochotense Bakalin et Vilnet,
Bryologist 115 (4): 575, 2012, “ ochotensis ” (see Bakalin & Vilnet 2012).
TYPE: “ RUSSIA: KURILS ISLANDS, Paramushir Island, 50°13’50” N, 155°34’20” E, 43 m alt., wet scoria field, leg. V. Bakalin 02 Aug. 2008, K–115–4–04 (holotype: VBGI, isotype: KPABG)”.
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 74, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
An econometric analysis of the competitive position of Australian cotton in the Japanese market
Creators: name: Chang,   Hui-Shung (Christie)
name: Chang,   Hui-Shung (Christie)
Publisher: name: Unknown
Year: 2000
Subjects: subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: International Relations/Trade
subject: almost ideal demand system
subject: cotton marketing
subject: import demand
subject: Japan

description: Although a relatively small producer, Australia exports but about 90% of its cotton production, making it the third largest cotton exporter. This means that export performance plays a major role in determining the profitability of the Australian cotton industry. The primary aim was to determine the competitive position of Australian cotton in the Japanese market, based on the AIDS model using data from 1972 to 1998. The main findings were that the United States had a relatively strong market position and that to improve its market position, Australia should become more cost competitive and/or improve its quality image through promotion.
Chaos synchronization in gap-junction-coupled neurons
Creators: name: Yoshioka, Masahiko
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Depending on temperature the modified Hodgkin-Huxley (MHH) equations exhibit a variety of dynamical behavior including intrinsic chaotic firing. We analyze synchronization in a large ensemble of MHH neurons that are interconnected with gap junctions. By evaluating tangential Lyapunov exponents we clarify whether synchronous state of neurons is chaotic or periodic. Then, we evaluate transversal Lyapunov exponents to elucidate if this synchronous state is stable against infinitesimal perturbations. Our analysis elucidates that with weak gap junctions, stability of synchronization of MHH neurons shows rather complicated change with temperature. We, however, find that with strong gap junctions, synchronous state is stable over the wide range of temperature irrespective of whether synchronous state is chaotic or periodic. It turns out that strong gap junctions realize the robust synchronization mechanism, which well explains synchronization in interneurons in the real nervous system.
description: Accepted for publication in Phys. Rev. E
Structured eigenvalue problems in electronic structure methods from a unified perspective
Creators: name: Li, Zhendong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In (relativistic) electronic structure methods, the quaternion matrix eigenvalue problem and the linear response (Bethe-Salpeter) eigenvalue problem for excitation energies are two frequently encountered structured eigenvalue problems. While the former problem was thoroughly studied, the later problem in its most general form, namely, the complex case without assuming the positive definiteness of the electronic Hessian, is not fully understood. In view of their very similar mathematical structures, we examined these two problems from a unified point of view. We showed that the identification of Lie group structures for their eigenvectors provides a framework to design diagonalization algorithms as well as numerical optimizations techniques on the corresponding manifolds. By using the same reduction algorithm for the quaternion matrix eigenvalue problem, we provided a necessary and sufficient condition to characterize the different scenarios, where the eigenvalues of the original linear response eigenvalue problem are real, purely imaginary, or complex. The result can be viewed as a natural generalization of the well-known condition for the real matrix case.
description: 6 pages, 2 figures
Search for dark matter produced in association with a dark Higgs boson decaying into $W^\pm W^\mp$ or $ZZ$ in fully hadronic final states from $\sqrt{s}=13$ TeV $pp$ collisions recorded with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Several extensions of the Standard Model predict the production of dark matter particles at the LHC. An uncharted signature of dark matter particles produced in association with $VV=W^\pm W^\mp$ or $ZZ$ pairs from a decay of a dark Higgs boson $s$ is searched for using 139 fb$^{-1}$ of $pp$ collisions recorded by the ATLAS detector at a center-of-mass energy of 13 TeV. The $s\to V(q\bar q)V(q\bar q)$ decays are reconstructed with a novel technique aimed at resolving the dense topology from boosted $VV$ pairs using jets in the calorimeter and tracking information. Dark Higgs scenarios with $m_s > 160$ GeV are excluded.
description: 32 pages in total, author list starting page 16, 4 figures, 1 table, submitted to Physical Review Letters. All figures including auxiliary figures available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2018-40/
Why one needs a functional renormalization group to survive in a disordered world
Creators: name: Wiese, Kay Joerg
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: In these proceedings, we discuss why functional renormalization is an essential tool to treat strongly disordered systems. More specifically, we treat elastic manifolds in a disordered environment. These are governed by a disorder distribution, which after a finite renormalization becomes non-analytic, thus overcoming the predictions of the seemingly exact dimensional reduction. We discuss how a renormalizable field theory can be constructed even beyond 2-loop order. We then consider an elastic manifold embedded in N dimensions, and give the exact solution for N to infinity. This is compared to predictions of the Gaussian replica variational ansatz, using replica symmetry breaking. Finally, the effective action at order 1/N is reported.
description: Proceedings of STATPHYS 22
Radiative Corrections in a Vector-Tensor Model
Creators: name: Chishtie, F.
name: Gagné-Portelance, M.
name: Hanif, T.
name: Homayouni, S.
name: McKeon, D. G. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In a recently proposed model in which a vector non-Abelian gauge field interacts with an antisymmetric tensor field, it has been shown that the tensor field possesses no physical degrees of freedom. This formal demonstration is tested by computing the one-loop contributions of the tensor field to the self-energy of the vector field. It is shown that despite the large number of Feynman diagrams in which the tensor field contributes, the sum of these diagrams vanishes, confirming that it is not physical. Furthermore, if the tensor field were to couple with a spinor field, it is shown at one-loop order that the spinor self-energy is not renormalizable, and hence this coupling must be excluded. In principle though, this tensor field does couple to the gravitational field.
Export Performance in South Pacific Countries Marginally Endowed with Natural Resources: Samoa and Tonga, 1960 to 1999
Creators: name: Fleming, Euan M.
name: Blowes, Anita
name: Fleming, Euan M.
name: Blowes, Anita
Publisher: name: Unknown
Year: 2003
Subjects: subject: International Relations/Trade
subject: export performance
subject: stochastic dominance
subject: Samoa
subject: Tonga

description: Stochastic dominance analysis was used to assess export performance in two Polynesian countries of similar size and structure that are both marginally endowed with natural resources: Samoa and Tonga. In general, total and agricultural export values declined over the study period in both countries, brought about by a significant decline in the value of agricultural exports while non- agricultural exports showed small increases. The one exception to this trend was in Tonga during the 1990s when squash exports brought about a revival in agricultural export values. Results suggest that these countries are likely to struggle to achieve sustainable economic development, given their limited natural resource endowments. The fisheries sector holds the key to whether their economies can continue to be productive by exploiting further the fishery resources within their EEZs to develop domestic fishing industries.
More about spontaneous Lorentz-violation and infrared modification of gravity
Creators: name: Libanov, M. V.
name: Rubakov, V. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a model with Lorentz-violating vector field condensates, in which dispersion laws of all perturbations, including tensor modes, undergo non-trivial modification in the infrared. The model is free of ghosts and tachyons at high 3-momenta. At low 3-momenta there are ghosts, and at even lower 3-momenta there exist tachyons. Still, with appropriate choice of parameters, the model is phenomenologically acceptable. Beyond a certain large distance scale and even larger time scale, the gravity of a static source changes from that of General Relativity to that of van Dam--Veltman--Zakharov limit of the Fierz--Pauli theory. Yet the late time cosmological evolution is always determined by the standard Friedmann equation, modulo small correction to the ``cosmological Planck mass'', so the modification of gravity cannot by itself explain the accelerated expansion of the Universe. We argue that the latter property is generic in a wide class of models with condensates.
description: 15 pages, 1 figure, JHEP3.cls; Added references
Solenostoma rossicum Bakalin et Vilnet, Bryologist
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Jungermanniales
Solenostomataceae
Solenostoma
Solenostoma rossicum

description: Solenostoma rossicum Bakalin et Vilnet,
Bryologist 115 (4): 571, 2012, “ rossica ” (see Bakalin & Vilnet 2012).
TYPE: “ RUSSIA: KHABAROVSK TERRITORY, Okhotsk District 59°27′31″N, 143°27′49″E, 153 m alt., clayish soil in roadside, with Nardia japonica Steph. Leg. V. Bakalin 26 July 2008, Kh–40–4–08 (holotype: VBGI; isotype: KPABG)”.
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 74, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
Transient Radio Signatures from Neutron Star Encounters with QCD Axion Miniclusters
Creators: name: Edwards, Thomas D. P.
name: Kavanagh, Bradley J.
name: Visinelli, Luca
name: Weniger, Christoph
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The QCD axion is expected to form dense structures known as axion miniclusters if the Peccei-Quinn symmetry is broken after inflation. Miniclusters that have survived until today will interact with neutron stars (NSs) in the Milky Way to produce transient radio signals from axion-photon conversion in the NS magnetosphere. We quantify the properties of these encounters and find that they occur frequently ($\mathcal{O}(1-100)\,\mathrm{day}^{-1}$); last between a day and a few months; are spatially clustered towards the Galactic center; and can reach observable fluxes. These radio transients are within reach of current generation telescopes and therefore offer a promising pathway to discovering QCD axion dark matter.
description: 11 pages, 5 figures. Code is available online at https://github.com/bradkav/axion-miniclusters/ (archived at https://doi.org/10.5281/zenodo.4006128 ). Joint submission with "Stellar Disruption of Axion Miniclusters in the Milky Way" in astro-ph (arXiv:2011.05377). Updated to match published version
Minimal redefinition of the OSV ensemble
Creators: name: Parvizi, Shahrokh
name: Tavanfar, Alireza
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the interesting conjecture, Z_{BH} = |Z_{top}|^2, proposed by Ooguri, Strominger and Vafa (OSV), the black hole ensemble is a mixed ensemble and the resulting degeneracy of states, as obtained from the ensemble inverse-Laplace integration, suffers from prefactors which do not respect the electric-magnetic duality. One idea to overcome this deficiency, as claimed recently, is imposing nontrivial measures for the ensemble sum. We address this problem and upon a redefinition of the OSV ensemble whose variables are as numerous as the electric potentials, show that for restoring the symmetry no non-Euclidean measure is needful. In detail, we rewrite the OSV free energy as a function of new variables which are combinations of the electric-potentials and the black hole charges. Subsequently the Legendre transformation which bridges between the entropy and the black hole free energy in terms of these variables, points to a generalized ensemble. In this context, we will consider all the cases of relevance: small and large black holes, with or without D_6-brane charge. For the case of vanishing D_6-brane charge, the new ensemble is pure canonical and the electric-magnetic duality is restored exactly, leading to proper results for the black hole degeneracy of states. For more general cases, the construction still works well as far as the violation of the duality by the corresponding OSV result is restricted to a prefactor. In a concrete example we shall show that for black holes with non-vanishing D_6-brane charge, there are cases where the duality violation goes beyond this restriction, thus imposing non-trivial measures is incapable of restoring the duality. This observation signals for a deeper modification in the OSV proposal.
description: 23 pages, v2: minor changes