cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Desafios da gestão universitária: a captação de recursos na Universidade Estadual de Feira de Santana (UEFS)
Creators: name: Mota Júnior, Antônio de Macêdo
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 390303
subject: Higher education
classificationCode: 390403
subject: Educational administration, management and leadership

description: Este trabalho trata de desafios da gestão universitária, notadamente da sua dimensão econômica acerca da política de financiamento da Universidade Estadual de Feira de Santana (UEFS), no que diz respeito à captação de recursos financeiros externos como mecanismo possível de auxiliar na sua sustentabilidade financeira.
Grantia Fleming 1828
Creators: name: Lopes, Matheus Vieira
name: Padua, André
name: Azevedo, Fernanda
name: Klautau, Michelle
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Calcarea
Leucosolenida
Grantiidae
Grantia

description: Genus Grantia Fleming, 1828
Diagnosis: “ Leucosolenida in which there is always a cortex, supported by a skeleton of tangential spicules that can be diactines, triactines, tetractines, or any combination of these. The aquiferous system is either syconoid with radial and elongate choanocyte chambers, or sylleibid or leuconoid with elongate or spherical, scattered choanocyte chambers. The inhalant and exhalant aquiferous systems are always fully developed. The choanoskeleton is articulate, tubular in syconoid species, and contains few to several rows of triactines and/or tetractines, or is, in leuconoid species, arranged without apparent order. In the latter case, the choanoskeleton always preserves traces of the radial organisation, particularly at the level of the subatrial triactines and/or tetractines. The atrial skeleton consisting of tangential triactines and/or tetractines is well developed” (Borojević et al. 2002).
Type species: Spongia compressa Fabricius, 1780 by original designation.
description: Published as part of Lopes, Matheus Vieira, Padua, André, Azevedo, Fernanda & Klautau, Michelle, 2025, Integrative taxonomy of Calcarea (Porifera) from Espírito Santo, Eastern Brazil, pp. 151-205 in Zootaxa 5618 (2) on pages 178-179, DOI: 10.11646/zootaxa.5618.2.1, http://zenodo.org/record/15217655
On the Image Conjecture for Locally Finite Derivations and $\mathcal E$-Derivations
Creators: name: Essen, Arno van den
name: Zhao, Wenhua
Publisher: name: arXiv
Year: 2017
Subjects: subject: Commutative Algebra (math.AC)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 47B47, 08A35, 16W25, 16D99

description: Some cases of the LFED Conjecture, proposed by the second author [Z3], for certain integral domains are proved. In particular, the LFED Conjecture is completely established for the field of fractions $k(x)$ of the polynomial algebra $k[x]$, the formal power series algebra $k[[x]]$ and the Laurent formal power series algebra $k[[x]][x^{-1}]$, where $x=(x_1, x_2, \dots, x_n)$ denotes $n$ commutative free variables and $k$ a field of characteristic zero. Furthermore, the relation between the LFED Conjecture and the Duistermaat-van der Kallen Theorem [DK] is also discussed and emphasized.
description: Some minor changes. The final version. Latex 13 pages
SU(2)-cyclic surgeries and the pillowcase
Creators: name: Sivek, Steven
name: Zentner, Raphael
Publisher: name: arXiv
Year: 2017
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We study knots in $S^3$ with infinitely many $SU(2)$-cyclic surgeries, which are Dehn surgeries such that every representation of the resulting fundamental group into $SU(2)$ has cyclic image. We show that for every such nontrivial knot $K$, its set of $SU(2)$-cyclic slopes is bounded and has a unique limit point, which is both a rational number and a boundary slope for $K$. We also show that such knots are prime and have infinitely many instanton L-space surgeries. Our methods include the application of holonomy perturbation techniques to instanton knot homology, using a strengthening of recent work by the second author.
description: 66 pages, 6 figures; v2: revised following referee reports
แนวทางการพัฒนาสมรรถนะและพฤติกรรมด้านการสอนต่อประสิทธิผลการสอนของอาจารย์พิเศษทางคลินิกกายภาพบำบัดในประเทศไทย
Creators: name: นันท์ อุดมเฉลิมภัทร
Publisher: name: คณะนิเทศศาสตร์ มหาวิทยาลัยราชภัฏรำไพพรรณี
Year: 2567
Subjects: อาจารย์พิเศษทางคลินิก
สมรรถนะ
พฤติกรรมด้านการสอน
ประสิทธิผลการสอนทางคลินิก

description: วารสารสหวิทยาการสังคมศาสตร์และการสื่อสาร, 7, 2, 16-30
Hermitian-Yang-Mills connections on collapsing elliptically fibered $K3$ surfaces
Creators: name: Datar, Ved
name: Jacob, Adam
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Let $X\rightarrow {\mathbb P}^1$ be an elliptically fibered $K3$ surface, admitting a sequence $ω_{i}$ of Ricci-flat metrics collapsing the fibers. Let $V$ be a holomorphic $SU(n)$ bundle over $X$, stable with respect to $ω_i$. Given the corresponding sequence $Ξ_i$ of Hermitian-Yang-Mills connections on $V$, we prove that, if $E$ is a generic fiber, the restricted sequence $Ξ_i|_{E}$ converges to a flat connection $A_0$. Furthermore, if the restriction $V|_E$ is of the form $\oplus_{j=1}^n\mathcal O_E(q_j-0)$ for $n$ distinct points $q_j\in E$, then these points uniquely determine $A_0$.
description: This version contains new notation, further expository details, and a breaking of the main result into a Theorem and Corollary, as suggested by the referee
Amonilea crescens
Creators: name: Harzhauser, Mathias
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Trochida
Trochidae
Amonilea
Amonilea crescens

description: Amonilea crescens (Fuchs, 1870) †
Oligocene (Rupelian): Western Tethys (Italy).
(Oppenheim 1900a)
description: Published as part of Harzhauser, Mathias, 2021, The Cainozoic to present-day record of Circum-Mediterranean, NE Atlantic and North Sea Cantharidinae and Trochinae (Trochoidea, Gastropoda) - a synopsis, pp. 1-81 in Zootaxa 4902 (1) on page 17, DOI: 10.11646/zootaxa.4902.1.1, http://zenodo.org/record/4419088
ЛЕЧЕНИЕ ПНЕВМОНИИ У НОВОРОЖДЕННЫХ
Creators: name: Акбарова, Лобар
name: Ачилов, Дилшод
Publisher: name: Zenodo
Year: 2024

description: Пневмония — одна из основных проблем практической неонатологии. Заболеваемость составляет около 1% среди доношенных новорожденных и до 10% среди недоношенных.  У младенцев, которые сразу после рождения находились на длительной ИВЛ, распространенность нозокомиальной пневмонии составляет до 40-45%. Воспаление легких рассматривается в качестве основной причины или сопутствующего фактора до 25% летальных исходов в период неонатальности. По данным Росстата, младенческая смертность от пневмонии достигает 7,5%.
Periodic points and tail lengths of split polynomial maps modulo primes
Creators: name: Hutz, Benjamin
name: Patel, Teerth
Publisher: name: arXiv
Year: 2017
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37P25, 37P35, 11B50

description: Explicit formulas are obtained for the number of periodic points and maximum tail length of split polynomial maps over finite fields for affine and projective space. This work includes a detailed analysis of the structure of the directed graph for Chebyshev polynomials of non-prime degree in dimension 1 and the powering map in any dimension. The results are applied to an algorithm for determining the type of a given map through analysis of its cycle statistics modulo primes.
description: 14 pages
"Life after death" in ordinary differential equations with a non-Lipschitz singularity
Creators: name: Drivas, Theodore D.
name: Mailybaev, Alexei A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider a class of ordinary differential equations in $d$-dimensions featuring a non-Lipschitz singularity at the origin. Solutions of such systems exist globally and are unique up until the first time they hit the origin, $t = t_b$, which we term `blowup'. However, infinitely many solutions may exist for longer times. To study continuation past blowup, we introduce physically motivated regularizations: they consist of smoothing the vector field in a $ν$--ball around the origin and then removing the regularization in the limit $ν\to 0$. We show that this limit can be understood using a certain autonomous dynamical system obtained by a solution-dependent renormalization procedure. This procedure maps the pre-blowup dynamics, $t < t_b$, to the solution ending at infinitely large renormalized time. In particular, the asymptotic behavior as $t \nearrow t_b$ is described by an attractor. The post-blowup dynamics, $t > t_b$, is mapped to a different renormalized solution starting infinitely far in the past. Consequently, it is associated with another attractor. The $ν$-regularization establishes a relation between these two different "lives" of the renormalized system. We prove that, in some generic situations, this procedure selects a unique global solution (or a family of solutions), which does not depend on the details of the regularization. We provide concrete examples and argue that these situations are qualitatively similar to post-blowup scenarios observed in infinite-dimensional models of turbulence.
description: 27 pages, 8 figures
Amonilea mitis
Creators: name: Harzhauser, Mathias
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Trochida
Trochidae
Amonilea
Amonilea mitis

description: Amonilea mitis (Deshayes, 1863) †
Eocene (Lutetian): NE Atlantic, Paris Basin (France).
(Pacaud 2008)
description: Published as part of Harzhauser, Mathias, 2021, The Cainozoic to present-day record of Circum-Mediterranean, NE Atlantic and North Sea Cantharidinae and Trochinae (Trochoidea, Gastropoda) - a synopsis, pp. 1-81 in Zootaxa 4902 (1) on page 17, DOI: 10.11646/zootaxa.4902.1.1, http://zenodo.org/record/4419088
กลยุทธ์การจัดจำหน่ายเสาวรสในอำเภอเขาค้อจังหวัดเพชรบูรณ์
Creators: name: ภาคภูมิ สายโสภา
Publisher: name: คณะนิเทศศาสตร์ มหาวิทยาลัยราชภัฏรำไพพรรณี
Year: 2567
Subjects: กลยุทธ์
การจัดจำหน่าย
ผลิตภัณฑ์

description: วารสารสหวิทยาการสังคมศาสตร์และการสื่อสาร, 7, 2, 31-41
Study of methods of resolved top quark reconstruction in semileptonic $t\bar{t}$ decay
Creators: name: Kvita, Jiří
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Study of methods of resolved top quarks kinematic reconstruction in the $t\bar{t} \rightarrow \ell+$jets channel is presented at the particle level as well as the fast-simulation detector level. Previous and current pseudo-top quark reconstruction algorithms are compared with suggestions presented on how to improve the reconstructed top-quark mass line shape, including the check of performance on physics observables in terms of correlations between detector, particle and parton levels, and in unfolding, with implications for current high energy physics experiments.
description: 38 pages, fix to usage of NLO weights
Multi-agent online learning in time-varying games
Creators: name: Duvocelle, Benoit
name: Mertikopoulos, Panayotis
name: Staudigl, Mathias
name: Vermeulen, Dries
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: Primary 91A10, 91A26, secondary 68Q32, 68T02

description: We examine the long-run behavior of multi-agent online learning in games that evolve over time. Specifically, we focus on a wide class of policies based on mirror descent, and we show that the induced sequence of play (a) converges to Nash equilibrium in time-varying games that stabilize in the long run to a strictly monotone limit; and (b) it stays asymptotically close to the evolving equilibrium of the sequence of stage games (assuming they are strongly monotone). Our results apply to both gradient-based and payoff-based feedback - i.e., the "bandit feedback" case where players only get to observe the payoffs of their chosen actions.
description: 35 pages
การปรับตัวของสื่อมวลชนท้องถิ่นภาคตะวันออกเฉียงเหนือเพื่อเข้าสู่สังคมออนไลน์
Creators: name: พิสิษฐ์ ชาญเจริญ
Publisher: name: คณะนิเทศศาสตร์ มหาวิทยาลัยราชภัฏรำไพพรรณี
Year: 2567
Subjects: การปรับตัว
สื่อมวลชนท้องถิ่นภาคตะวันออกเฉียงเหนือ
สื่อสังคมออนไลน์

description: วารสารสหวิทยาการสังคมศาสตร์และการสื่อสาร, 7, 2, 42-57
Large-Scale Poloidal Magnetic Field Dynamo Leads to Powerful Jets in GRMHD Simulations of Black Hole Accretion with Toroidal Field
Creators: name: Liska, M. T. P.
name: Tchekhovskoy, A.
name: Quataert, E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Accreting black holes (BHs) launch relativistic collimated jets, across many decades in luminosity and mass, suggesting the jet launching mechanism is universal, robust and scale-free. Theoretical models and general relativistic magnetohydrodynamic (GRMHD) simulations indicate that the key jet-making ingredient is large-scale poloidal magnetic flux. However, its origin is uncertain, and it is unknown if it can be generated in situ or dragged inward from the ambient medium. Here, we use the GPU-accelerated GRMHD code H-AMR to study global 3D BH accretion at unusually high resolutions more typical of local shearing box simulations. We demonstrate that turbulence in a radially-extended accretion disc can generate large-scale poloidal magnetic flux in situ, even when starting from a purely toroidal magnetic field. The flux accumulates around the BH till it becomes dynamically-important, leads to a magnetically arrested disc (MAD), and launches relativistic jets that are more powerful than the accretion flow. The jet power exceeds that of previous GRMHD toroidal field simulations by a factor of 10,000. The jets do not show significant kink or pinch instabilities, accelerate to $γ\sim 10$ over 3 decades in distance, and follow a collimation profile similar to the observed M87 jet.
description: 5 pages, 4 figures; See our YouTube channel for accompanying animations: https://www.youtube.com/watch?v=9Cp09Fbh7Hw
Amonilea parnensis
Creators: name: Harzhauser, Mathias
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Trochida
Trochidae
Amonilea
Amonilea parnensis

description: * Amonilea parnensis (Bayan, 1870) †
Figs 7A 1 –A 2
Eocene (Lutetian): NE Atlantic, Paris Basin (France).
Oligocene (Rupelian): Western Tethys (Italy).
(Oppenheim 1900a; Pacaud 2008)
description: Published as part of Harzhauser, Mathias, 2021, The Cainozoic to present-day record of Circum-Mediterranean, NE Atlantic and North Sea Cantharidinae and Trochinae (Trochoidea, Gastropoda) - a synopsis, pp. 1-81 in Zootaxa 4902 (1) on page 17, DOI: 10.11646/zootaxa.4902.1.1, http://zenodo.org/record/4419088
Prionodontidae Horsfield 1824
Creators: name: Don E. Wilson
name: Russell A. Mittermeier
Publisher: name: Lynx Edicions
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Carnivora
Prionodontidae

description: Family PRIONODONTIDAE
(LINSANGS)
• Small mammals with slender, genet-like aspect, pointed muzzle, elongated neck, and tail almost as long as the head and body; spotted coat pattern and a pair of large stripes on the nape.
• 61-84.9 cm.
• South-east Asia.
• Moist and evergreen forests, including montane forests up to 2700 m.
• 1 genus, 2 species, 4 taxa.
• No species threatened; none Extinct since 1600.
description: Published as part of Don E. Wilson & Russell A. Mittermeier, 2009, Prionodonotidae, pp. 170-173 in Handbook of the Mammals of the World – Volume 1 Carnivores, Barcelona :Lynx Edicions on page 170, DOI: 10.5281/zenodo.5714314
Bardeen-Petterson Alignment, Jets and Magnetic Truncation in GRMHD Simulations of Tilted Thin Accretion Discs
Creators: name: Liska, M.
name: Tchekhovskoy, A.
name: Ingram, A.
name: van der Klis, M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Prevalent around luminous accreting black holes, thin discs are challenging to resolve in numerical simulations. When the disc and black hole angular momentum vectors are misaligned, the challenge becomes extreme, requiring adaptive meshes to follow the disc proper as it moves through the computational grid. With our new high-performance general relativistic magnetohydrodynamic (GRMHD) code H-AMR we have simulated the thinnest accretion disc to date, of aspect ratio H/R~0.03, around a rapidly spinning (a=0.9375) black hole, using a cooling function. Initially tilted at 10 degrees, the disc warps inside r~5 r_g into alignment with the black hole, where r_g is the gravitational radius. This is the first demonstration of Bardeen-Petterson alignment in MHD with viscosity self-consistently generated by magnetized turbulence. The disc develops a low-density high-viscosity (alpha_eff ~ 1.0) magnetic-pressure--dominated inner region at r<25 r_g that rapidly empties itself into the black hole. This inner region may in reality, due to thermal decoupling of ions and electrons, evaporate into a radiatively inefficient accretion flow if, as we propose, the cooling time exceeds the accretion time set by the order unity effective viscosity. We furthermore find the unexpected result that even our very thin disc can sustain large-scale vertical magnetic flux on the black hole, which launches powerful relativistic jets that carry 20-50% of the accretion power along the angular momentum vector of the outer tilted disc, providing a potential explanation for the origin of jets in radio-loud quasars.
description: 12 pages, 7 figures, see https://www.youtube.com/watch?v=eccVsm04_SM for tilted disc animation
การรับรู้ของเยาวชนผู้ชมรายการแดร็กเรซไทยแลนด์ต่อภาพตัวแทนความเท่าเทียมทางเพศและสิทธิของผู้มีความหลากหลายทางเพศ
Creators: name: วัฒณี ภูวทิศ
Publisher: name: คณะนิเทศศาสตร์ มหาวิทยาลัยราชภัฏรำไพพรรณี
Year: 2567
Subjects: การรับรู้
ภาพตัวแทน
ความเท่าเทียมทางเพศ
ผู้มีความหลากหลายทางเพศ

description: วารสารสหวิทยาการสังคมศาสตร์และการสื่อสาร, 7, 2, 58-69
มาตรการทางกฎหมายเพื่อส่งเสริมการประมงที่ยั่งยืน:กรณีศึกษาประมงชายฝั่งทะเลภาคตะวันออก
Creators: name: อาทิตยา โภคสุทธิ์
Publisher: name: คณะนิเทศศาสตร์ มหาวิทยาลัยราชภัฏรำไพพรรณี
Year: 2567
Subjects: มาตรการทางกฎหมาย
การประมงที่ยั่งยืน
ประมงชายฝั่งทะเลภาคตะวันออก

description: วารสารสหวิทยาการสังคมศาสตร์และการสื่อสาร, 7, 2, 70-82
Anceps adelae
Creators: name: Harzhauser, Mathias
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Archaeogastropoda
Trochidae
Anceps
Anceps adelae

description: Anceps adelae (d’Orbigny, 1844) †
? = Trochus obtustus Kolesnikov, 1935
Middle-late Miocene (Bessarabian): Eastern Paratethys Sea (Moldova, Bulgaria, Ukraine, Russia). (Sladkovskaya 2017)
description: Published as part of Harzhauser, Mathias, 2021, The Cainozoic to present-day record of Circum-Mediterranean, NE Atlantic and North Sea Cantharidinae and Trochinae (Trochoidea, Gastropoda) - a synopsis, pp. 1-81 in Zootaxa 4902 (1) on page 18, DOI: 10.11646/zootaxa.4902.1.1, http://zenodo.org/record/4419088
A Kontsevich integral of order 1
Creators: name: Mortier, Arnaud
Publisher: name: arXiv
Year: 2018
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25, 55T25

description: We define a 1-cocycle in the space of long knots that is a natural generalization of the Kontsevich integral seen as a 0-cocycle. It involves a 2-form that generalizes the Knizhnik--Zamolodchikov connection. We show that the well-known close relationship between the Kontsevich integral and Vassiliev invariants (via the algebra of chord diagrams and 1T-4T relations) is preserved between our integral and Vassiliev 1-cocycles, via a change of variable similar to the one that led Birman--Lin to discover the 4T relations. We explain how this construction is related to Cirio--Faria Martins' categorification of the Knizhnik--Zamolodchikov connection.
description: 44 pages, 21 figures
Estimation of the Spatial Weighting Matrix for Spatiotemporal Data under the Presence of Structural Breaks
Creators: name: Otto, Philipp
name: Steinert, Rick
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: In this paper, we propose a two-step lasso estimation approach to estimate the full spatial weights matrix of spatiotemporal autoregressive models. In addition, we allow for an unknown number of structural breaks in the local means of each spatial locations. The proposed approach jointly estimates the spatial dependence, all structural breaks, and the local mean levels. In addition, it is easy to compute the suggested estimators, because of a convex objective function resulting from a slight simplification. Via simulation studies, we show the finite-sample performance of the estimators and provide a practical guidance, when the approach could be applied. Eventually, the invented method is illustrated by an empirical example of regional monthly real-estate prices in Berlin from 1995 to 2014. The spatial units are defined by the respective ZIP codes. In particular, we can estimate local mean levels and quantify the deviation of the observed prices from these levels due to spatial spill over effects.
description: Journal of Computational and Graphical Statistics (2022)
Factor-Driven Two-Regime Regression
Creators: name: Lee, Sokbae
name: Liao, Yuan
name: Seo, Myung Hwan
name: Shin, Youngki
Publisher: name: arXiv
Year: 2018
Subjects: subject: Econometrics (econ.EM)
subject: FOS: Economics and business
subject: 60K35 (Primary), 60K35 (secondary)

description: We propose a novel two-regime regression model where regime switching is driven by a vector of possibly unobservable factors. When the factors are latent, we estimate them by the principal component analysis of a panel data set. We show that the optimization problem can be reformulated as mixed integer optimization, and we present two alternative computational algorithms. We derive the asymptotic distribution of the resulting estimator under the scheme that the threshold effect shrinks to zero. In particular, we establish a phase transition that describes the effect of first-stage factor estimation as the cross-sectional dimension of panel data increases relative to the time-series dimension. Moreover, we develop bootstrap inference and illustrate our methods via numerical studies.
Lifetimes and g-factors of the HFS states in H-like and Li-like bismuth
Creators: name: Hannen, Volker
name: Vollbrecht, Jonas
name: Andelkovic, Zoran
name: Brandau, Carsten
name: Dax, Andreas
name: Geithner, Wolfgang
name: Geppert, Christopher
name: Gorges, Christian
name: Hammen, Michael
name: Kaufmann, Simon
name: König, Kristian
name: Litvinov, Yuri A.
name: Lochmann, Matthias
name: Maaß, Bernhard
name: Meisner, Johann
name: Murböck, Tobias
name: Sánchez, Rodolfo
name: Schmidt, Matthias
name: Schmidt, Stefan
name: Steck, Markus
name: Stöhlker, Thomas
name: Thompson, Richard C.
name: Trageser, Christian
name: Ullmann, Johannes
name: Weinheimer, Christian
name: Nörtershäuser, Wilfried
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The LIBELLE experiment performed at the experimental storage ring (ESR) at the GSI Helmholtz Center for Heavy Ion Research in Darmstadt, Germany, has successfully determined the ground state hyperfine (HFS) splittings in hydrogen-like ($^{209}\rm{Bi}^{82+}$) and lithium-like ($^{209}\rm{Bi}^{80+}$) bismuth. The study of HFS transitions in highly charged ions enables precision tests of QED in extreme electric and magnetic fields otherwise not attainable in laboratory experiments. Besides the transition wavelengths the time resolved detection of fluorescence photons following the excitation of the ions by a pulsed laser system also allows to extract lifetimes of the upper HFS levels and g-factors of the bound 1s and 2s electrons for both charge states. While the lifetime of the upper HFS state in $^{209}\rm{Bi}^{82+}$ has already been measured in earlier experiments, an experimental value for lifetime of this state in $^{209}\rm{Bi}^{80+}$ is reported for the first time in this work.
description: 14 pages, 6 figures
Complete Subset Averaging with Many Instruments
Creators: name: Lee, Seojeong
name: Shin, Youngki
Publisher: name: arXiv
Year: 2018
Subjects: subject: Econometrics (econ.EM)
subject: Methodology (stat.ME)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: We propose a two-stage least squares (2SLS) estimator whose first stage is the equal-weighted average over a complete subset with $k$ instruments among $K$ available, which we call the complete subset averaging (CSA) 2SLS. The approximate mean squared error (MSE) is derived as a function of the subset size $k$ by the Nagar (1959) expansion. The subset size is chosen by minimizing the sample counterpart of the approximate MSE. We show that this method achieves the asymptotic optimality among the class of estimators with different subset sizes. To deal with averaging over a growing set of irrelevant instruments, we generalize the approximate MSE to find that the optimal $k$ is larger than otherwise. An extensive simulation experiment shows that the CSA-2SLS estimator outperforms the alternative estimators when instruments are correlated. As an empirical illustration, we estimate the logistic demand function in Berry, Levinsohn, and Pakes (1995) and find the CSA-2SLS estimate is better supported by economic theory than the alternative estimates.
description: 56 pages, 3 figures, 10 tables
Optimizing Software Effort Estimation Models Using Firefly Algorithm
Creators: name: Ghatasheh, Nazeeh
name: Faris, Hossam
name: Aljarah, Ibrahim
name: Al-Sayyed, Rizik M. H.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Software Engineering (cs.SE)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Software development effort estimation is considered a fundamental task for software development life cycle as well as for managing project cost, time and quality. Therefore, accurate estimation is a substantial factor in projects success and reducing the risks. In recent years, software effort estimation has received a considerable amount of attention from researchers and became a challenge for software industry. In the last two decades, many researchers and practitioners proposed statistical and machine learning-based models for software effort estimation. In this work, Firefly Algorithm is proposed as a metaheuristic optimization method for optimizing the parameters of three COCOMO-based models. These models include the basic COCOMO model and other two models proposed in the literature as extensions of the basic COCOMO model. The developed estimation models are evaluated using different evaluation metrics. Experimental results show high accuracy and significant error minimization of Firefly Algorithm over other metaheuristic optimization algorithms including Genetic Algorithms and Particle Swarm Optimization.
description: 9 pages
Verfahrensdokumentation für FB-ST: Fragebogen zur Beurteilung von Studienbedingungen durch Studierende
Creators: name: Westermann, R.
name: Spies, K.
name: Heise, E.
name: Wollburg-Claar, S.
Publisher: name: ZPID (Leibniz Institute for Psychology) – Open Test Archive
Year: 2018
Subjects: subject: Studierende (Anfangssemester)
subject: Hochschulen
subject: Zufriedenheit
subject: Person-Umwelt-Kongruenz
subject: Hochschulausbildung
subject: Schüler- und Studierendenmerkmale
subject: Bildungsansprüche
subject: Hochschulumwelt
subject: Bedürfnisse
subject: Lehrzielorientierte Diagnostik
subject: Curriculum
subject: College Students
subject: Colleges
subject: Satisfaction
subject: Person Environment Fit
subject: Higher Education
subject: Student Characteristics
subject: Educational Aspirations
subject: College Environment
subject: Needs
subject: Curriculum Based Assessment
subject: 150

description: Mit dem Forschungsinstrument können Studierende unterschiedlicher Fachrichtungen anhand von 40 festen und 9 weiteren offenen Items die Studienbedingungen an universitären Einrichtungen bewerten. Als Konstruktionsgrundlage dienten mehrere Forschungsinstrumente. Reliabilität: Es fehlen Angaben zur Reliabilität. Validität: An einer groß angelegten Stichprobe wurde die Faktorenstruktur überprüft, welche ein Vierfaktorenmodell nahelegte.
description: With this measure, students from different disciplines can evaluate the study conditions at university institutions on the basis of 40 fixed and 9 additional open items. Several research instruments served as a basis for the design. Reliability: Information about reliability is not given. Validity: A large sample was used to check the factor structure, which suggested a four-factor model.
Linear and Quadratic GUP, Liouville Theorem, Cosmological Constant, and Brick Wall Entropy
Creators: name: Vagenas, Elias C.
name: Ali, Ahmed Farag
name: Hemeda, Mohammed
name: Alshal, Hassan
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Motivated by the works on Equivalence Principle in the context of linear Generalized Uncertainty Principle and, independently, in the context of quadratic Generalized Uncertainty Principle, we expand these endeavors in the context of Generalized Uncertainty Principle when both linear and quadratic terms in momentum are include. We demonstrate how the definitions of equations of motion change upon that expansion. We also show how to obtain an analogue of Liouville theorem in the presence of linear and quadratic Generalized Uncertainty Principle. We employ the corresponding modified invariant unit volume of phase space to discuss the resulting density of states, the problem of cosmological constant, the black body radiation in curved spacetime, the concurrent energy and consequent no Brick Wall entropy.
description: v1: 10 pages, RevTex, 7 figures; v2: references updated, one footnote added; v3: two footnotes and references added, no change in physics, to appear in EPJC
Massless Charged Particles, Naked Singularity, and Generalized Uncertainty Principle in Reissner-Nordström-de Sitter-like spacetime
Creators: name: Vagenas, Elias C.
name: Ali, Ahmed Farag
name: Alshal, Hassan
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Motivated by the endeavors of Li Xiang and You-Gen Shen on naked singularities, we investigate the validity of the cosmic censorship conjecture in the context of generalized uncertainty principle. In particular, upon considering both linear and quadratic terms of momentum in the uncertainty principle, we first compute the entropy of a massless charged black hole in de Sitter spacetime at a given modified temperature. Then, we compute the corresponding modified cosmological radius and express the black hole electric charge in terms of this modified cosmological radius and, thus, in terms of the generalized uncertainty principle parameter. Finally, we examine whether such a system will end up being a naked singularity or it might be protected by the cosmic censorship conjecture, and how that might be related to the possible existence of massless charged particles.
description: v1: 8 pages, 4 figures, RevTex;
Disc Tearing and Bardeen-Petterson Alignment in GRMHD Simulations of Highly Tilted Thin Accretion Discs
Creators: name: Liska, M.
name: Hesp, C.
name: Tchekhovskoy, A.
name: Ingram, A.
name: van der Klis, M.
name: Markoff, S. B.
name: Van Moer, M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Luminous active galactic nuclei (AGN) and X-Ray binaries (XRBs) often contain geometrically thin, radiatively cooled accretion discs. According to theory, these are -- in many cases -- initially highly misaligned with the black hole equator. In this work, we present the first general relativistic magnetohydrodynamic simulations of very thin (h/r~0.015-0.05) accretion discs around rapidly spinning (a~0.9) black holes and tilted by 45-65 degrees. We show that the inner regions of the discs with h/r<0.03 align with the black hole equator, though out to smaller radii than predicted by analytic work. The inner aligned and outer misaligned disc regions are separated by a sharp break in tilt angle accompanied by a sharp drop in density. We find that frame-dragging by the spinning black hole overpowers the disc viscosity, which is self-consistently produced by magnetized turbulence, tearing the disc apart and forming a rapidly precessing inner sub-disc surrounded by a slowly precessing outer sub-disc. We find that the system produces a pair of relativistic jets for all initial tilt values. At small distances the black hole launched jets precess rapidly together with the inner sub-disc, whereas at large distances they partially align with the outer sub-disc and precess more slowly. If the tearing radius can be modeled accurately in future work, emission model independent measurements of black hole spin based on precession-driven quasi-periodic oscillations may become possible.
description: 8 pages, 5 figures, accompanying animations included in YouTube playlist: https://www.youtube.com/playlist?list=PLDO1oeU33GwlaPSME1TdCto1Y3P6yG91L
A new proof of Bowers-Stephenson conjecture
Creators: name: Xu, Xu
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Inversive distance circle packing on surfaces was introduced by Bowers-Stephenson as a generalization of Thurston's circle packing and conjectured to be rigid. The infinitesimal and global rigidity of circle packing with nonnegative inversive distance were proved by Guo and Luo respectively. The author proved the global rigidity of circle packing with inversive distance in $(-1,+\infty)$. In this paper, we give a new variational proof of the Bowers-Stephenson conjecture for inversive distance in $(-1,+\infty)$, which simplifies the existing proofs and could be generalized to three dimensional case.
description: 19 pages
Runko: Modern multiphysics toolbox for plasma simulations
Creators: name: Nättilä, J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Runko is a new open-source plasma simulation framework implemented in C++ and Python. It is designed to function as an easy-to-extend general toolbox for simulating astrophysical plasmas with different theoretical and numerical models. Computationally intensive low-level kernels are written in modern C++ taking advantage of polymorphic classes, multiple inheritance, and template metaprogramming. High-level functionality is operated with Python scripts. The hybrid program design ensures good code performance together with ease of use. The framework has a modular object-oriented design that allows the user to easily add new numerical algorithms to the system. The code can be run on various computing platforms ranging from laptops (shared-memory systems) to massively parallel supercomputer architectures (distributed-memory systems). The framework supports heterogeneous multiphysics simulations in which different physical solvers can be combined and run simultaneously. Here we showcase the framework's relativistic particle-in-cell (PIC) module by presenting (i) 1D simulations of relativistic Weibel instability, (ii) 2D simulations of relativistic kinetic turbulence in a suddenly stirred magnetically-dominated pair plasma, and (iii) 3D simulations of collisionless shocks in an unmagnetized medium.
description: 18 pages, 7 figures. Accepted to A&A. Code available from https://github.com/natj/runko
Anceps anceps anceps (Eichwald 1850
Creators: name: Harzhauser, Mathias
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Archaeogastropoda
Trochidae
Anceps
Anceps anceps

description: * Anceps anceps (Eichwald, 1850) †
Figs 7B 1 –B 2
= Trochus proanceps Siminescu & Barbu, 1940
= Trochus sarmatoanceps Sinzow, 1897
= Trochus turriculoides Sinzow, 1877
Middle-late Miocene (Volhynian, Bessarabian): Eastern Paratethys Sea (Bulgaria, Romania, Moldova, Ukraine, Russia).
(Sladkovskaya 2017)
description: Published as part of Harzhauser, Mathias, 2021, The Cainozoic to present-day record of Circum-Mediterranean, NE Atlantic and North Sea Cantharidinae and Trochinae (Trochoidea, Gastropoda) - a synopsis, pp. 1-81 in Zootaxa 4902 (1) on page 18, DOI: 10.11646/zootaxa.4902.1.1, http://zenodo.org/record/4419088
Sideband cooling of the radial modes of motion of a single ion in a Penning trap
Creators: name: Hrmo, P.
name: Joshi, M. K.
name: Jarlaud, V.
name: Corfield, O.
name: Thompson, R. C.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Doppler and sideband cooling are long standing techniques that have been used together to prepare trapped atomic ions in their ground state of motion. In this paper we study how these techniques can be extended to cool both radial modes of motion of a single ion in a Penning trap. We numerically explore the prerequisite experimental parameters for efficient Doppler cooling in the presence of an additional oscillating electric field to resonantly couple the radial modes. The simulations are supported by experimental data for a single $^{40}$Ca$^+$ ion Doppler cooled to $\sim$100 phonons in both modes at a magnetron frequency of 52 kHz and a modified cyclotron frequency of 677 kHz. For these frequencies, we then show that mean phonon numbers of $0.35(5)$ for the modified cyclotron and $1.7(2)$ for the magnetron motions are achieved after 68 ms of sideband cooling.
A note on the topological slice genus of satellite knots
Creators: name: Feller, Peter
name: Miller, Allison N.
name: Pinzon-Caicedo, Juanita
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25

description: This paper presents evidence supporting the surprising conjecture that in the topological category the slice genus of a satellite knot $P(K)$ is bounded above by the sum of the slice genera of $K$ and $P(U)$. Our main result establishes this conjecture for a variant of the topological slice genus, the $\mathbb{Z}$-slice genus. As an application, we show that the $(n,1)$-cable of any 3-genus 1 knot (e.g. the figure 8 or trefoil knot) has topological slice genus at most 1. Further, we show that the lower bounds on the slice genus coming from the Tristram-Levine and Casson-Gordon signatures cannot be used to disprove the conjecture. Notably, the conjectured upper bound does not involve the algebraic winding number of the pattern $P$. This stands in stark contrast with the smooth category, where for example there are many genus 1 knots whose $(n,1)$-cables have arbitrarily large smooth 4-genera.
description: 17 pages, 5 figures, comments welcome
Iterated traces in 2-categories and Lefschetz theorems
Creators: name: Campbell, Jonathan A.
name: Ponto, Kate
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: While not obvious from its initial motivation in linear algebra, there are many context where iterated traces can be defined. In this paper we prove a very general theorem about iterated 2-categorical traces. We show that many Lefschetz-type theorems in the literature are consequences of this result and the new perspective we provide allows for immediate spectral generalizations.
description: Significant revisions
Monogenic fields arising from trinomials
Creators: name: Ibarra, Ryan
name: Lembeck, Henry
name: Ozaslan, Mohammad
name: Smith, Hanson
name: Stange, Katherine E.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11R04

description: We call a polynomial monogenic if a root $θ$ has the property that $\mathbb{Z}[θ]$ is the full ring of integers in $\mathbb{Q}(θ)$. Consider the two families of trinomials $x^n + ax + b$ and $x^n + cx^{n-1} + d$. For any $n>2$, we show that these families are monogenic infinitely often and give some positive densities in terms of the coefficients. When $n=5$ or 6 and when a certain factor of the discriminant is square-free, we use the Montes algorithm to establish necessary and sufficient conditions for monogeneity, illuminating more general criteria given by Jakhar, Khanduja, and Sangwan using other methods. Along the way we remark on the equivalence of certain aspects of the Montes algorithm and Dedekind's index criterion.
description: 15 pages, 4 figures, 3 tables. Significant changes, revisions, and improvements have been made from the previous version. Comments welcome!
Coastal Fog and Low Cloud Zone Contour Map of the San Francisco Bay Area in Poster Format
Creators: name: Torregrosa, Alicia
Publisher: name: U.S. Geological Survey
Year: 2016
Subjects: coastal fog, climatology, meteorology, coast, fog, environment

description: This map depicts frequency of summertime coastal fog and low cloud cover (FLCC) for the San Francisco Bay Area as contours in units of hours per day. Each contour interval equals one half-hour.  The  upper left latitude/longitude coordinates of the map are -123.571/38.861 decimal degrees (DD) and the lower right -121.204/36.852 DD.  The map shows the FLCC zones along the coast from Gualala in Sonoma County to Moss Landing in Monterey County.  Two linear feature overlays are added as a locational aid, the Caltrans roads layer and a black line delineating the ocean and estuary.  The map is derived from National Weather Service hourly satellite imagery as described in Torregrosa et al (2016) http://doi.org/cmxf. The map is formatted for plotting as a poster of 36 inch width and 30 inch length.
Quasi-isometrically rigid subgroups in right-angled Coxeter groups
Creators: name: Genevois, Anthony
Publisher: name: arXiv
Year: 2019
Subjects: subject: Group Theory (math.GR)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 20F65, 20F67, 20F69

description: In the spirit of peripheral subgroups in relatively hyperbolic groups, we exhibit a simple class of quasi-isometrically rigid subgroups in graph products of finite groups, which we call eccentric subgroups. As an application, we prove that, if two right-angled Coxeter groups $C(Γ_1)$ and $C(Γ_2)$ are quasi-isometric, then for any minsquare subgraph $Λ_1 \leq Γ_1$ there exists a minsquare subgraph $Λ_2 \leq Γ_2$ such that the right-angled Coxeter groups $C(Λ_1)$ and $C(Λ_2)$ are quasi-isometric as well. Various examples of non-quasi-isometric groups are deduced. Our arguments are based on a study of non-hyperbolic Morse subgroups in graph products of finite groups. As a by-product, we are able to determine precisely when a right-angled Coxeter group has all its infinite-index Morse subgroups hyperbolic, answering a question of Russell, Spriano and Tran.
description: 35 pages, 8 figures. Comments are welcome!
Desperate times call for desperate measures: government spending multipliers in hard times
Creators: name: Lee, Sokbae
name: Liao, Yuan
name: Seo, Myung Hwan
name: Shin, Youngki
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: We investigate state-dependent effects of fiscal multipliers and allow for endogenous sample splitting to determine whether the US economy is in a slack state. When the endogenized slack state is estimated as the period of the unemployment rate higher than about 12 percent, the estimated cumulative multipliers are significantly larger during slack periods than non-slack periods and are above unity. We also examine the possibility of time-varying regimes of slackness and find that our empirical results are robust under a more flexible framework. Our estimation results point out the importance of the heterogenous effects of fiscal policy and shed light on the prospect of fiscal policy in response to economic shocks from the current COVID-19 pandemic.
description: 15 pages, 5 figures, 2 table
Symmetries and hidden symmetries of $(ε, d_L)$-twisted knot complements
Creators: name: Hoffman, Neil R.
name: Millichap, Christian
name: Worden, William
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25, 57M50, 57M27

description: In this paper we analyze symmetries, hidden symmetries, and commensurability classes of $(ε, d_L)$-twisted knot complements, which are the complements of knots that have a sufficiently large number of twists in each of their twist regions. These knot complements can be constructed via long Dehn fillings on fully augmented links complements. We show that such knot complements have no hidden symmetries, which implies that there are at most two other knot complements in their respective commensurability classes. Under mild additional hypotheses, we show that these knots have at most four (orientation-preserving) symmetries and are the only knot complements in their respective commensurability classes. Finally, we provide an infinite family of explicit examples of $(ε, d_L)$-twisted knot complements that are the unique knot complements in their respective commensurability classes obtained by filling a fully augmented link with four crossing circles.
description: Removed some highlighting of text that was overlooked in the previous version. This is the final version, to appear in Algebraic & Geometric Topology. 38 pages, 15 figures, 1 table
Right-angled polyhedra and alternating links
Creators: name: Champanerkar, Abhijit
name: Kofman, Ilya
name: Purcell, Jessica S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25, 57M50, 57M27

description: To any prime alternating link, we associate a collection of hyperbolic right-angled ideal polyhedra by relating geometric, topological and combinatorial methods to decompose the link complement. The sum of the hyperbolic volumes of these polyhedra is a new geometric link invariant, which we call the right-angled volume of the alternating link. We give an explicit procedure to compute the right-angled volume from any alternating link diagram, and prove that it is a new lower bound for the hyperbolic volume of the link.
description: 32 pages, 16 figures. V2 includes minor edits and corrections, mainly to exposition, based on referee comments. To appear in Algebr. Geom. Topol
Sartang Lexicon - Overview File
Creators: name: Bodt, Timotheus Adrianus
Publisher: name: Zenodo
Year: 2018
Subjects: Arunachal Pradesh
Sartang
Western Kho-Bwa
linguistic reconstruction
sound files
Khoitam
Khoina
Rahung
Jerigaon
Boot Monpa
Butpa
Proto-Western Kho-Bwa
proto-language
historical linguistics

description: This overview file presents the Metadata of the Sartang Lexicon files and their DOIs.