cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Roos bound for skew cyclic codes in Hamming and rank metric
Creators: name: Alfarano, Gianira N.
name: Lobillo, F. J.
name: Neri, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 11T71, 94B65, 16S36

description: In this paper, a Roos like bound on the minimum distance for skew cyclic codes over a general field is provided. The result holds in the Hamming metric and in the rank metric. The proofs involve arithmetic properties of skew polynomials and an analysis of the rank of parity-check matrices. For the rank metric case, a way to arithmetically construct codes with a prescribed minimum rank distance, using the skew Roos bound, is also given. Moreover, some examples of MDS codes and MRD codes over finite fields are built, using the skew Roos bound.
description: 15 pages
Convergence in Venture Capital Investments: Evidence from a Panel of 18 US Regions
Creators: name: Ballinger, T. Parker
name: Habegger, Wendy
name: Jones, Clifton T.
name: Thompson, Mark A.
name: Ballinger, T. Parker
name: Habegger, Wendy
name: Jones, Clifton T.
name: Thompson, Mark A.
Publisher: name: Unknown
Year: 2016
Subjects: Financial Economics

description: This empirical study examines the time series properties of U.S. venture capital investments across different geographical markets. Using a battery of panel unit root tests, we find substantial evidence of stochastic convergence in that (relative) venture capital investment shares are stationary. Our findings indicate that venture capital investment shocks are temporary and tend to adjust back to their respective long - run means. These results are supportive of convergence in economic activity as there may be diminishing returns to venture capital. As such, regional policymakers may use historical data to make projections and capital allocation decisions with regards to investment in entrepreneurial activities.
Where new gravitational physics comes from: M-theory?
Creators: name: Nojiri, Shin'ichi
name: Odintsov, Sergei D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is suggested \cite{CDTT} that current cosmic acceleration arises due to modification of General Relativity by the terms with negative powers of curvature. We show that time-dependent (hyperbolic) compactifications of string/M-theory lead to the effective 4d gravity which naturally contains such terms. The same may be achieved in braneworld by the proper choice of the boundary action. Hence, such a model which seems to eliminate the need for dark energy may have the origin in M-theory.
description: LaTeX file, 14 pages, minor changes, version to appear in PLB
Sigma models on curved space and bubble refraction in doped antiferromagnets
Creators: name: Speight, J. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: The dynamics of bubble solitons in two-dimensional isotropic antiferromagnets, inhomogeneously doped so that the exchange integral J becomes position dependent, is studied. In the usual continuum approximation, the system reduces to a nonlinear sigma model on a spacetime whose geometry depends on J(x). It is shown, both within the geodesic approximation, and by appealing to field theoretic conservation laws, that a bubble incident on a domain-wall inhomogeneity undergoes refraction in accordance with Snell's law, 1/J being identified with the refractive index, and that sufficiently oblique impacts result in total internal reflexion. Possible applications of this phenomenon to the construction of bubble lenses and bubble guides(in analogy with fibre-optic cables) are considered.
description: 12 pages, 6 figures
How Do Formal and Informal Financial Arrangements Influence the Growth and Routines of Small and Medium Scale Enterprises? A Qualitative Investigation of The Manufacturing Sector in Southwest Nigeria
Creators: name: Ajewole, Olajide Timothy
Publisher: name: UH Research Archive
Year: 2021
Subjects: Borrowers
Corporate Affairs Commission (CAC)
Formality
Formal financial sector
Formal financial lenders
Formal sector
Formal institutions
Fragmentation
Habits
Hard information
Informality
Informal financial lenders
Impersonal exchange mechanism
Informal sector
Informal institutions
Institutional Arrangement
Legality
Mechanism of exchange or exchange mechanism
Official channels
Organisation
Personal exchange mechanism
Registration
Shadow economy
Soft information
Tax Identification Number (TIN)

description: There is a substantial body of empirical research on institutional arrangements through which financial relationships are structured in Africa. Although current literature on formal and informal financial institutional arrangement has advanced our understanding of their comparative importance, there is a dearth of empirical investigations on the implications of loan preconditions on the growth of/adoption of routines in small and medium enterprises (SMEs).. Thus, this study investigates the impact of formal and informal financial arrangements on SMEs growth and routine change in the Nigerian manufacturing sector. Semi-structured interviews were conducted with representatives of eleven SMEs that are beneficiaries of loans from formal and informal financial lenders were targeted. Nine representatives of formal and informal lenders were also interviewed. The outcome sheds light on how financial arrangements may impact growth and routine change amongst SMEs in Nigeria. The growth and routine change experienced by SME are shown to vary according to the loan attributes and preconditions associated with the type of lender respectively. Also, the findings reveal the nature of the interplay between formal and informal financial lenders and its consequences; such as improved access to loans, better enforcement, savings and disbursement; while also helping the government to achieve its lending target and easing the challenges of trust and quality relationships. These results contribute to the theoretical debate regarding the origins of routines and the mechanisms of routine change. Furthermore, it emphasises that further quantitative studies would be essential in investigating its relevance for (on) policy.
Anisotropic brane cosmologies with exponential potentials
Creators: name: Aguirregabiria, J. M.
name: Lazkoz, Ruth
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study Bianchi I type brane cosmologies with scalar matter self-interacting through combinations of exponential potentials. Such models correspond in some cases to inflationary universes. We discuss the conditions for accelerated expansion to occur, and pay particular attention to the influence of extra dimensions and anisotropy. Our results show that the associated effects evolve in such a way that they become negligible in the late time limit, those related to the anisotropy disappearing earlier. This study focuses mainly on single field models, but we also consider a generalization yielding models with multiple non-interacting fields and examine its features briefly. We conclude that in the brane scenario, as happens in general relativity, an increase in the number of fields assists inflation.
description: 11 pages, 1 figure
From intrabasinal volcanism to far-field tectonics: causes of abrupt shifts in sediment provenance in the Devonian–Carboniferous Drummond Basin, Queensland
Creators: name: K. Sobczak
name: S. E. Bryan
name: C. R. Fielding
name: M. Corkeron
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: The Drummond Basin of central Queensland preserves a large-volume succession of little studied, predominantly fluviatile, coarse-grained sedimentary rocks of mid-Mississippian age. The stratigraphy of the basin has been subdivided into three sedimentary cycles. The Cycle 1/Cycle 2 boundary records a distinct, but poorly understood change in provenance from a volcanic-dominated succession related to initial basin rifting (Cycle 1) to a quartz-rich, craton-derived succession (Cycle 2). Cycle 3 has been thought to mark a resumption of intrabasinal volcanism and related sedimentation. The purpose of this study was to enhance the understanding of the basin-wide siliciclastic sedimentation of Cycles 2 and 3, and causes for the changes in sediment provenance. This objective was achieved by constraining large-scale spatial and temporal depositional trends and investigating sediment transport pathways into and through the basin. Petrographic, QFL, paleocurrent and conglomerate clast analyses were undertaken. The observations presented here have several implications relevant to understanding the stratigraphy of the Drummond Basin and regional tectonic events at this time. Cycle 3 is revised here primarily to be a continuation of Cycle 2-style basement-derived sedimentation, rather than recording a resumption of volcanism in the area, as per prevailing models. Quartz-rich sedimentation in the Drummond Basin was, therefore, more long-lived than previously envisaged, and once established, was not significantly disrupted by volcanism. Cycle 2 formation thicknesses appear highly variable across the basin. This is unlikely to be a result of pre-existing rift-related topography as suggested in previous models. The thickness variations are more likely related to sediment bypassing and post-depositional deformation in the area. The distinctive coarse-grained, relatively quartz-rich sedimentation of Cycles 2 and 3 is unusual in its volume and extent. The sediment was transported into the basin from its southern/southwestern margin, implying long-distance transport and extrabasinal sediment supply. While the specific source terrain(s) remain unknown, one plausible tectonic driver was far-field influence of the intraplate Alice Springs Orogeny.
Spectrum of global string networks and the axion dark matter mass
Creators: name: Saikawa, Ken'ichi
name: Redondo, Javier
name: Vaquero, Alejandro
name: Kaltschmidt, Mathieu
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cold dark matter axions produced in the post-inflationary Peccei-Quinn symmetry breaking scenario serve as clear targets for their experimental detection, since it is in principle possible to give a sharp prediction for their mass once we understand precisely how they are produced from the decay of global cosmic strings in the early Universe. In this paper, we perform a dedicated analysis of the spectrum of axions radiated from strings based on large scale numerical simulations of the cosmological evolution of the Peccei-Quinn field on a static lattice. Making full use of the massively parallel code and computing resources, we executed the simulations with up to $11264^3$ lattice sites, which allows us to improve our understanding of the dependence on the parameter controlling the string tension and thus give a more accurate extrapolation of the numerical results. We found that there are several systematic effects that have been overlooked in previous works, such as the dependence on the initial conditions, contaminations due to oscillations in the spectrum, and discretisation effects, some of which could explain the discrepancy in the literature. We confirmed the trend that the spectral index of the axion emission spectrum increases with the string tension, but did not find a clear evidence of whether it continues to increase or saturates to a constant at larger values of the string tension due to the severe discretisation effects. Taking this uncertainty into account and performing the extrapolation with a simple power law assumption on the spectrum, we find that the dark matter mass is predicted in the range of $m_a \approx 95$-$450\,μ\mathrm{eV}$.
description: 52 pages, 46 figures; revised version of the manuscript, accepted for publication in JCAP
Direct Characterization of Quantum Measurements using Weak Values
Creators: name: Xu, Liang
name: Xu, Huichao
name: Jiang, Tao
name: Xu, Feixiang
name: Zheng, Kaimin
name: Wang, Ben
name: Zhang, Aonan
name: Zhang, Lijian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The time-symmetric formalism endows the weak measurement and its outcome, the weak value,many unique features. In particular, it allows a direct tomography of quantum states without resort to complicated reconstruction algorithms and provides an operational meaning to wave functions and density matrices. Here, we propose and experimentally demonstrate the direct tomography of a measurement apparatus by taking the backward direction of weak measurement formalism. Our protocol works rigorously with the arbitrary measurement strength, which offers an improved accuracy and precision. The precision can be further improved by taking into account the completeness condition of the measurement operators, which also ensures the feasibility of our protocol for the characterization of the arbitrary quantum measurement. Our work provides new insight on the symmetry between quantum states and measurements, as well as an efficient method to characterize a measurement apparatus.
description: 6 pages, 3 figures
Spherical Vesicles Distorted by a Grafted Latex Bead: An Exact Solution
Creators: name: Benoit, Jerome
name: Saxena, Avadh
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We present an exact solution to the problem of the global shape description of a spherical vesicle distorted by a grafted latex bead. This solution is derived by treating the nonlinearity in bending elasticity through the (topological) Bogomol'nyi decomposition technique and elastic compatibility. We recover the ``hat-model'' approximation in the limit of a small latex bead and find that the region antipodal to the grafted latex bead flattens. We also derive the appropriate shape equation using the variational principle and relevant constraints.
description: 12 pages, 2 figures, LaTeX2e+REVTeX+AmSLaTeX
Parallel Quantum Computing in a Single Ensemble Quantum Computer
Creators: name: Long, Gui Lu
name: Xiao, Li
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a parallel quantum computing mode for ensemble quantum computer. In this mode, some qubits can be in pure states while other qubits in mixed states. It enables a single ensemble quantum computer to perform $"$single-instruction-multi-data" type of parallel computation. In Grover's algorithm and Shor's algorithm, parallel quantum computing can provide additional speedup. In addition, it also makes a fuller use of qubit resources in an ensemble quantum computer. As a result, some qubits discarded in the preparation of an effective pure state in the Schulman-Varizani, and the Cleve-DiVincenzo algorithms can be re-utilized.
description: 4 pages, no figure
Anachoropteris pulchra Corda 1845
Creators: name: Galtier, Jean
name: Ronchi, Ausonio
name: Broutin, Jean
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Zygopteridales
Psalixochlaenaceae
Anachoropteris
Anachoropteris pulchra

description: Anachoropteris pulchra Corda, 1845   (Fig. 6H, I)
 A few fragments of rachises of this fern have been found; one (Fig. 6H) shows the characteristic abaxially enrolled xylem strand, a feature more hardly visible in another specimen (Fig. 6I). The latter is a larger rachis with a still more inrolled xylem strand. Both are conform to the species Anachoropteris pulchra Corda from Radnice, also recognized at Grand-Croix and Autun (Corsin 1937).
 Marattialean tree ferns: fragments of the different parts of the plant are present in nearly 90% of the specimens including Psaronius trunks with aerial roots, Stewartiopteris petioles and rachises, Pecopteris and Scolecopteris pinnules
description: Published as part of Galtier, Jean, Ronchi, Ausonio & Broutin, Jean, 2011, Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France), pp. 43-69 in Geodiversitas 33 (1) on page 56, DOI: 10.5252/g2011n1a4, http://zenodo.org/record/4596948
Low-Metallicity Gas Clouds in a Galaxy Proto-Cluster at Redshift 2.38
Creators: name: Francis, Paul J.
name: Williger, Gerard M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high resolution spectroscopy of a QSO whose sight-line passes through the halo of a pair of elliptical galaxies at redshift 2.38. This pair of galaxies probably lies at the center of a galaxy proto-cluster, and is embedded in a luminous extended Ly-alpha nebula. The QSO sight-line intersects two small gas clouds within this halo. These clouds have properties similar to those of high velocity clouds (HVCs) seen in the halo of the Milky Way. The gas is in a cool (< 2 x 10^4 K) and at least 20% neutral phase, with metallicities in the range -3.0 < [Fe/H] < -1.1 and neutral hydrogen column densities of ~10^19.5 /cm^2. The origin of these clouds is unclear. The presence of low metallicity gas within this possible proto-cluster implies either that the intra-cluster medium has not been enriched with metals at this redshift, or the clouds are embedded within a hot, ionized, metal-rich gas phase.
description: Accepted to appear in ApJ Letters
Laminar Chaos in experiments and nonlinear delayed Langevin equations: A time series analysis toolbox for the detection of Laminar Chaos
Creators: name: Müller-Bender, David
name: Otto, Andreas
name: Radons, Günter
name: Hart, Joseph D.
name: Roy, Rajarshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Recently, it was shown that certain systems with large time-varying delay exhibit different types of chaos, which are related to two types of time-varying delay: conservative and dissipative delays. The known high-dimensional Turbulent Chaos is characterized by strong fluctuations. In contrast, the recently discovered low-dimensional Laminar Chaos is characterized by nearly constant laminar phases with periodic durations and a chaotic variation of the intensity from phase to phase. In this paper we extend our results from our preceding publication [J. D. Hart, R. Roy, D. Müller-Bender, A. Otto, and G. Radons, PRL 123 154101 (2019)], where it is demonstrated that Laminar Chaos is a robust phenomenon, which can be observed in experimental systems. We provide a time-series analysis toolbox for the detection of robust features of Laminar Chaos. We benchmark our toolbox by experimental time series and time series of a model system which is described by a nonlinear Langevin equation with time-varying delay. The benchmark is done for different noise strengths for both the experimental system and the model system, where Laminar Chaos can be detected, even if it is hard to distinguish from Turbulent Chaos by a visual analysis of the trajectory.
description: 16 pages, 14 figures; v2: minor corrections, typos; v3: minor corrections, typos, added journal reference and DOI
Quasi-periodic traveling waves on an infinitely deep fluid under gravity
Creators: name: Feola, Roberto
name: Giuliani, Filippo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 76B15-35Q31-35Q35-37KXX-35C07

description: We consider the gravity water waves system with a periodic one-dimensional interface in infinite depth and we establish the existence and the linear stability of small amplitude, quasi-periodic in time, traveling waves. This provides the first existence result of quasi-periodic water waves solutions bifurcating from a \emph{completely resonant} elliptic fixed point. The proof is based on a Nash-Moser scheme, Birkhoff normal form methods and pseudo-differential calculus techniques. We deal with the combined problems of \emph{small divisors} and the \emph{fully-nonlinear} nature of the equations. The lack of parameters, like the capillarity or the depth of the ocean, demands a refined \emph{nonlinear} bifurcation analysis involving several non-trivial resonant wave interactions, as the well-known "Benjamin-Feir resonances". We develop a novel normal form approach to deal with that. Moreover, by making full use of the Hamiltonian structure, we are able to provide the existence of a wide class of solutions which are free from restrictions of parity in the time and space variables.
description: To appear on Memoirs of the American Mathematical Society
Resonant nucleation of spatio-temporal order via parametric modal amplification
Creators: name: Gleiser, Marcelo
name: Howell, Rafael C.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate, analytically and numerically, the emergence of spatio-temporal order in nonequilibrium scalar field theories. The onset of order is triggered by destabilizing interactions (DIs), which instantaneously change the interacting potential from a single to a double-well, tunable to be either degenerate (SDW) or nondegenerate (ADW). For the SDW case, we observe the emergence of spatio-temporal coherent structures known as oscillons. We show that this emergence is initially synchronized, the result of parametric amplification of the relevant oscillon modes. We also discuss how these ordered structures act as bottlenecks for equipartition. For ADW potentials, we show how the same parametric amplification mechanism may trigger the rapid decay of a metastable state. For a range of temperatures, the decay rates associated with this resonant nucleation can be orders of magnitude larger than those computed by homogeneous nucleation, with time-scales given by a simple power law, $τ_{\rm RN}\sim[E_b/k_BT]^B$, where $B$ depends weakly on the temperature and $E_b/k_BT$ is the free-energy barrier of a critical fluctuation.
description: 38 pages, 20 figures now included within the text
Acute changes in lung function following controlled exposure to cookstove air pollution in the subclinical tests of volunteers exposed to smoke (STOVES) study
Creators: name: Fedak, Kristen M.
name: Good, Nicholas
name: Walker, Ethan S.
name: Balmes, John
name: Brook, Robert D.
name: Clark, Maggie L.
name: Cole-Hunter, Tom
name: Devlin, Robert
name: L’Orange, Christian
name: Luckasen, Gary
name: Mehaffy, John
name: Shelton, Rhiannon
name: Wilson, Ander
name: Volckens, John
name: Peel, Jennifer L.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Background: Exposure to household air pollution generated as a result of cooking and heating is a leading contributor to global disease. The effects of cookstove-generated air pollution on adult lung function, however, remain uncertain. Objectives: We investigated acute responses in lung function following controlled exposures to cookstove-generated air pollution. Methods: We recruited 48 healthy adult volunteers to undergo six two-hour treatments: a filtered-air control and emissions from five different stoves with fine particulate matter (PM2.5) targets from 10 to 500 µg/m3. Spirometry was conducted prior to exposure and immediately, and three and 24 h post-exposure. Mixed-effect models were used to estimate differences in post-exposure lung function for stove treatments versus control. Results: Immediately post-exposure, lung function was lower compared to the control for the three highest PM2.5-level stoves. The largest differences were for the fan rocket stove (target 250 µg/m3; forced vital capacity (FVC): −60 mL, 95% confidence interval (95% CI) -135, 15; forced expiratory volume (FEV1): −51 mL, 95% CI -117, 16; mid-expiratory flow (FEF25–75): −116 mL/s, 95% CI -239, 8). At 3 h post-exposure, lung function was lower compared to the control for all stove treatments; effects were of similar magnitude for all stoves. At 24 h post-exposure, results were consistent with a null association for FVC and FEV1; FEF25–75 was lower relative to the control for the gasifier, fan rocket, and three stone fire. Conclusions: Patterns suggesting short-term decreases in lung function follow from exposure to cookstove air pollution even for stove exposures with low PM2.5 levels.
Current and readable (book review) : Cinema and Social Change in Latin America
Creators: name: Aufderheide, Patricia
Publisher: name: Vista
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture

description: Book Review of: Cinema and Social Change in Latin America by Julianne Burton, University of Texas Press, 302 pp. Review text is unavailable in digital format from the publisher.
Gravitational Mediation of Supersymmetry Breaking in Superstring Theory
Creators: name: Taylor, Tomasz R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: SUSY breaking and its mediation are among the most important problems of supersymmetric generalizations of the standard model. The idea of gravity-mediated SUSY breaking, proposed in 1982 by Arnowitt, Chamseddine and Nath, and independently by Barbieri, Ferrara and Savoy, fits naturally into superstring theory, where it can be realized at both classical as well as quantum levels. This talk is dedicated to Pran Nath on his 65th birthday.
description: 8 pages. Dedicated to Pran Nath on his 65th birthday
Methods of Employee Selection in Nepalese Organizations Based on Internet Technology: A Qualitative Inquiry
Creators: name: Pralhad Adhikari
Publisher: name: figshare
Year: 2021
Subjects: subject: 170107 Industrial and Organisational Psychology
subject: FOS: Psychology

description: Employee selection is the systematic process of choosing the fittest applicant in a vacant position. This qualitative research was conducted to identify the methods and process of employee selection in Nepalese organizations based on internet technology with a convenient sample of 20 spanning a total of 574 minutes of the interview. The data were recorded in virtual audio interviews and analyzed in the framework of content analysis. The methods adopted to select employees in the industry turned out to have seven themes: interview, written examination, assignments, headhunting, referral, and outsourcing. The conclusion is that Nepalese companies adopt some systematic techniques for hiring but they are not scientific enough not to risk loss caused due to wrong hiring decisions.
Modelling COVID-19 evolution and control in Portugal: Code and data from 2 to 27 of March 2020.
Creators: name: Pais, Ricardo Jorge
name: Taveira, Nuno
Publisher: name: figshare
Year: 2020
Subjects: subject: 111706 Epidemiology
subject: FOS: Health sciences

description: Supplementary data and code used for modelling the evolution of COVID-19 Pandemic in Portugal. In this online repository we include the code for implementing the mathematical model and ruining the simulations using PLAS software. We include the data of the number of confirmed cases in Portugal officially reported by the DGS (TableS1) and the results obtained by simulations (TableS2). We also include the python source code for data analysis and visualization using Jupyter notebook environment.
Psaronius
Creators: name: Galtier, Jean
name: Ronchi, Ausonio
name: Broutin, Jean
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Marattiales
Asterothecaceae
Psaronius

description: Psaronius sp.   (Fig. 7A, B)
 Fragments of root mantle of Psaronius trunks are common elements; they occur in about half of the specimens either as portions of the inner root mantle (Fig. 7A) where the roots are cohesive with an interstitial tissue, or as isolated larger roots from the outer zone of the trunk (Fig. 7B) showing a characteristic aerenchymatous cortex and stellate xylem strand. In the absence of information on the stele of the stem a specific attribution is, however, impossible.
description: Published as part of Galtier, Jean, Ronchi, Ausonio & Broutin, Jean, 2011, Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France), pp. 43-69 in Geodiversitas 33 (1) on page 56, DOI: 10.5252/g2011n1a4, http://zenodo.org/record/4596948
Microcausality and Quantum Cylindrical Gravitational Waves
Creators: name: G., J. Fernando Barbero
name: Marugan, Guillermo A. Mena
name: Villaseñor, Eduardo J. S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study several issues related to the different choices of time available for the classical and quantum treatment of linearly polarized cylindrical gravitational waves. We pay especial attention to the time evolution of creation and annihilation operators and the definition of Fock spaces for the different choices of time involved. We discuss also the issue of microcausality and the use of field commutators to extract information about the causal properties of quantum spacetime.
description: 12 pages, 4 figures, accepted for publication in Physical Review D
From Bit To Bedside: A Practical Framework For Artificial Intelligence Product Development In Healthcare
Creators: name: Higgins, David
name: Madai, Vince I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: Applications (stat.AP)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: I.2.1; J.3; H.4.1

description: Artificial Intelligence (AI) in healthcare holds great potential to expand access to high-quality medical care, whilst reducing overall systemic costs. Despite hitting the headlines regularly and many publications of proofs-of-concept, certified products are failing to breakthrough to the clinic. AI in healthcare is a multi-party process with deep knowledge required in multiple individual domains. The lack of understanding of the specific challenges in the domain is, therefore, the major contributor to the failure to deliver on the big promises. Thus, we present a decision perspective framework, for the development of AI-driven biomedical products, from conception to market launch. Our framework highlights the risks, objectives and key results which are typically required to proceed through a three-phase process to the market launch of a validated medical AI product. We focus on issues related to Clinical validation, Regulatory affairs, Data strategy and Algorithmic development. The development process we propose for AI in healthcare software strongly diverges from modern consumer software development processes. We highlight the key time points to guide founders, investors and key stakeholders throughout their relevant part of the process. Our framework should be seen as a template for innovation frameworks, which can be used to coordinate team communications and responsibilities towards a reasonable product development roadmap, thus unlocking the potential of AI in medicine.
description: 30 pages, 4 figures
The scaling relations of galaxy clusters and their dark matter halos
Creators: name: Lanzoni, B.
name: Ciotti, L.
name: Cappi, A.
name: Tormen, G.
name: Zamorani, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Like early-type galaxies, also nearby galaxy clusters define a Fundamental Plane, a luminosity-radius, and a luminosity-velocity dispersion relations, whose physical origin is still unclear. By means of high resolution N--body simulations of massive dark matter halos in a Lambda-CDM cosmology, we find that scaling relations similar to those observed for galaxy clusters are already defined by their dark matter hosts. The slopes however are not the same, and among the various possibilities in principle able to bring the simulated and the observed scaling relations in mutual agreement, we show that the preferred solution is a luminosity dependent mass-to-light ratio (M/L ~ L^0.3), that well corresponds to what inferred observationally. We then show that at galactic scales there is a conflict between the cosmological predictions of structure formation, the observed trend of the mass-to-light ratio in ellipticals, and the slope of their luminosity-velocity dispersion relation (that significantly differs from the analogous one followed by clusters). The conclusion is that the scaling laws of elliptical galaxies might be the combined result of the cosmological collapse of density fluctuations at the epoch when galactic scales became non-linear, plus important modifications afterward due to early-time dissipative merging. Finally, we briefly discuss the possible evolution of the cluster scaling relations with redshift.
description: 18 pages, 3 figures, ApJ, accepted version. A new Table added, some extended discussion, conclusions unchanged
Modelling COVID-19 evolution and control in Portugal: Code and data from 2 to 27 of March 2020.
Creators: name: Pais, Ricardo Jorge
name: Taveira, Nuno
Publisher: name: figshare
Year: 2020
Subjects: subject: 111706 Epidemiology
subject: FOS: Health sciences

description: Supplementary data and code used for modelling the evolution of COVID-19 Pandemic in Portugal. In this online repository we include the code for implementing the mathematical model and running the simulations using PLAS software. We include the data of the number of confirmed cases in Portugal officially reported by the DGS up to 19 August 2020 (TableS1 and Figure S1) and the results obtained by simulations (TableS2). We also include the python source code for data analysis and visualization using Jupyter notebook environment.
Beyond-mean-field effects on the symmetry energy and its slope from the low-lying dipole response of $^{68}$Ni
Creators: name: Grasso, M.
name: Gambacurta, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study low-energy dipole excitations in the unstable nucleus $^{68}$Ni with the beyond-mean-field (BMF) subtracted second random-phase-approximation (SSRPA) model based on Skyrme interactions. First, strength distributions are compared with available experimental data and transition densities of some selected peaks are analyzed. The so-called isospin splitting is also discussed by studying the isoscalar/isovector character of such excitations. We estimate then in an indirect way BMF effects on the symmetry energy of infinite matter and on its slope starting from the BMF SSRPA low-lying strength distribution. For this, several linear correlations are used, the first one being a correlation existing between the contribution (associated with the low-energy strength) to the total energy-weighted sum rule (EWSR) and the slope of the symmetry energy. BMF estimates for the slope of the symmetry energy can be extracted in this way. Correlations between such a slope and the neutron-skin thickness of $^{68}$Ni and correlations between the neutron-skin thickness of $^{68}$Ni and the electric dipole polarizability times the symmetry energy are then used to deduce BMF effects on the symmetry energy.
description: 10 figures
Stewartiopteris Morgan & Delevoryas 1952
Creators: name: Galtier, Jean
name: Ronchi, Ausonio
name: Broutin, Jean
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Marattiales
Asterothecaceae
Stewartiopteris

description: Stewartiopteris sp. 1 and sp. 2   (Fig. 7C, D)
 The large rachis (Fig. 7C), shows a broad C-shaped xylem strand (arrows, Fig. 7C) and outer sclerenchymatous cortex; it represents the proximal region of a frond. The smaller rachis shown on Figure 7D is quite distinct in cortical organization. It certainly corresponds to a second order rachis alongside the corresponding third order rachis (R3, Fig.7D) which is in connection with a fertile pinnule (P, Fig. 7D). These two Stewartiopteris rachises certainly belonged to different fronds.
Foliage of these tree ferns occasionally occurs as dense accumulations of vegetative and/or fertile pinnules as shown on Figure 7E. One section of an ultimate pinna, paradermal to the pinnule surfaces (Fig. 7F), reveals their pecopteroid morphology. At least three different taxa occur in the assemblage as is suggested by differences in the fertile pinnae.
description: Published as part of Galtier, Jean, Ronchi, Ausonio & Broutin, Jean, 2011, Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France), pp. 43-69 in Geodiversitas 33 (1) on pages 56-57, DOI: 10.5252/g2011n1a4, http://zenodo.org/record/4596948
Field-Induced Transition on Triangular Plane in the Spin Ice Compound Dy2Ti2O7
Creators: name: Higashinaka, Ryuji
name: Maeno, Yoshiteru
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The origin of the lowest-temperature anomaly reported several years ago using a polycrystalline sample of the spin ice compound Dy2Ti2O7 had remained unresolved. Here we finally clarify its origin by susceptibility measurements down to 65 mK using single crystals under accurate control of the magnetic fields in two independent directions. We demonstrate that the transition is induced under a subtle field combination that precisely cancel the nearest-neighbor spin interactions acting on the spins on the triangular lattice within the pyrochlore structure. Contrary to the other two fieldinduced transitions, this transition is driven only by the interactions beyond the nearest neighbors. Our observation thus provides the first qualitative evidence for the essential importance of the dipolar interaction beyond the nearest neighbors in the spin ice.
description: submitted to PRL
Clothes, Chocolate and Children: Realising the Transparency Dividend
Creators: name: Vaughn, Leona
name: Balch, Alex
name: Currie, Samantha
name: Stalford, Helen
name: Johns, Jennifer
Publisher: name: figshare
Year: 2020
Subjects: subject: 160607 International Relations
subject: FOS: Political science
subject: 150308 International Business
subject: FOS: Economics and business
subject: 160603 Comparative Government and Politics

description: 18 month British Academy funded project lde by Professor Alex Balch at University of Liverpool, considering the impact of the Modern Slavery Act requirements on transparency on the lived experiences of workers in the cocoa and garment sectors of Bangladesh, Ghana, Dominican Republic and Myanmar.
The research reveals supply chains characterized bypoverty, poor working conditions and business models whichnegatively impact workers’ experiences.
Pecopteris
Creators: name: Galtier, Jean
name: Ronchi, Ausonio
name: Broutin, Jean
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Marattiales
Asterothecaceae
Pecopteris

description: Pecopteris sp.   (Fig. 8A)
 A transverse section of a vegetative pinnule, similar to those shown on Figure 7E, shows the fleshy texture of the lamina (300-400 µm thick) with palisade and spongy parenchyma; the pinnule margins are flexed downwards and prominent hairs are borne on the lower epidermis. Such pinnules are smaller but very similar in organization to the vegetative pinnules attributed to Scolecopteris oliveri from Autun by Scott & Holden (1933); they may belong to the same plant as the associated fertile pinnules described hereafter.
description: Published as part of Galtier, Jean, Ronchi, Ausonio & Broutin, Jean, 2011, Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France), pp. 43-69 in Geodiversitas 33 (1) on page 57, DOI: 10.5252/g2011n1a4, http://zenodo.org/record/4596948
El Color Lavanda (film review)
Creators: name: Aufderheide, Patricia
Publisher: name: Formato 16
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture

description: Review of "The Color Purple (El Color Purpura)" published in: Formato 16, 1985, pp. 27-30. Article is unavailable in digital format from the publisher.
Minimal surfaces in pseudohermitian geometry
Creators: name: Cheng, Jih-Hsin
name: Hwang, Jenn-Fang
name: Malchiodi, Andrea
name: Yang, Paul
Publisher: name: arXiv
Year: 2004
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35L80; 35J70; 32V20; 53A10; 49Q10

description: We consider surfaces immersed in three-dimensional pseudohermitian manifolds. We define the notion of (p-)mean curvature and of the associated (p-)minimal surfaces, extending some concepts previously given for the (flat) Heisenberg group. We interpret the p-mean curvature not only as the tangential sublaplacian of a defining function, but also as the curvature of a characteristic curve, and as a quantity in terms of calibration geometry. As a differential equation, the p-minimal surface equation is degenerate (hyperbolic and elliptic). To analyze the singular set, we formulate some {\em extension} theorems, which describe how the characteristic curves meet the singular set. This allows us to classify the entire solutions to this equation and to solve a Bernstein-type problem (for graphs over the $xy$-plane) in the Heisenberg group $H_1$. In $H_{1}$, identified with the Euclidean space $R^{3}$, the p-minimal surfaces are classical ruled surfaces with the rulings generated by Legendrian lines. We also prove a uniqueness theorem for the Dirichlet problem under a condition on the size of the singular set in two dimensions, and generalize to higher dimensions without any size control condition. We also show that there are no closed, connected, $C^{2}$ smoothly immersed constant p-mean curvature or p-minimal surfaces of genus greater than one in the standard $S^{3}.$ This fact continues to hold when $S^{3}$ is replaced by a general spherical pseudohermitian 3-manifold.
description: 45 pages
Radio Observations of the Afterglow of GRB 030329
Creators: name: Kuno, N.
name: Sato, N.
name: Nakanishi, H.
name: Yamauchi, A.
name: Nakai, N.
name: Kawai, N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of the radio observations of the afterglow of GRB 030329 with the Nobeyama 45-m telescope. The observations were made at 23.5 GHz, 43 GHz, and 90 GHz. The light curves show steep decline after constant phase. The start time of the decline depends on frequency. Namely, the decline started earlier at higher frequency. The spectrum has a peak at mm wavelength range. The peak frequency and the peak flux decreased with time. These results are consistent with the expectation from fireball model.
description: 4 pages, 3 figures, to be published in PASJ Vol.56, No.2
Dynamical Environment and Surface Characteristics of Asteroid (16) Psyche
Creators: name: Moura, T. S.
name: Winter, O. C.
name: Amarante, A.
name: Sfair, R.
name: Borderes-Motta, G.
name: Valvano, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Radar observations show that (16) Psyche is one of the largest and most massive asteroids of the M-class located in the main belt, with a diameter of approximately 230 km. This fact makes Psyche a unique object since observations indicated an iron-nickel composition. It is believed that this body may be what was left of a metal core of an early planet that would have been fragmented over millions of years due to violent collisions. In this work we study a variety of dynamical aspects related to the surface, as well as, the environment around this asteroid. We use computational tools to explore the gravitational field generated by this body, assuming constant values for its density and rotation period. We then determine a set of physical and dynamical characteristics over its entire surface. The results include the geometric altitude, geopotential altitude, tilt, slope, among others. We also explore the neighborhood around the asteroid (16) Psyche, so that the location and linear stability of the equilibrium points were found. We found four external equilibrium points, two of them linearly stable. We confirmed the stability of these points by performing numerical simulations of massless particles around the asteroid, which also showed an asymmetry in the size of the stable regions. In addition, we integrate a cloud of particles in the vicinity of (16) Psyche in order to verify in which regions of its surface the particles are most likely to collide.
description: 19 pages
Plasma levels of polychlorinated biphenyl, genetic polymorphisms, and the risk of advanced stage endometriosis
Creators: name: Kim, Miran
name: Kim, Sung Hoon
name: Kim, Hyun Jin
name: Whang, Dong Hee
name: Sung-Cheol Yun
name: Lee, Sa Ra
name: Chae, Hee Dong
name: Kang, Byung Moon
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 60506 Virology

description: Both environmental and genetic factors interact and play a critical role in the pathogenesis of endometriosis. We analyzed the plasma levels of 12 polychlorinated biphenyl (PCB) congeners with genetic polymorphisms of glutathione-S-transferase M1 (GSTM1), glutathione-S-transferase T1 (GSTT1), and aryl hydrocarbon receptor repressor (AhRR) codon 185. Total sum of the 12 congeners was significantly higher in the controls compared with endometriosis group. Women without C/C genotype in AhRR codon 185 had a significantly increased risk of endometriosis compared with those with C/C genotype. Total sum of the 12 congeners was significantly higher in women without C/C genotype compared with those with C/C genotype. Adjusting for age and AhRR codon 185 genotype, there was no significant association between exposure to PCBs and the risk of endometriosis. These findings suggest a possible presence of gene-environment interaction, however, we could not see any clear association between exposure to PCBs and the risk of endometriosis.