cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sterile sector impacting the correlations and degeneracies among mixing parameters at the Deep Underground Neutrino Experiment
Creators: name: Parveen, Sabila
name: Masud, Mehedi
name: Bishai, Mary
name: Mehta, Poonam
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate the physics potential of the upcoming Deep Underground Neutrino Experiment (DUNE) in probing active-sterile mixing. We present analytic expressions for relevant oscillation probabilities for three active and one sterile neutrino of eV-scale mass and highlight essential parameters impacting the oscillation signals at DUNE. We then explore the space of sterile parameters as well as study their correlations among themselves and with parameters appearing in the standard framework ($δ_{13}$ and $θ_{23}$). We perform a combined fit for the near and far detector at DUNE using GLoBES. We consider alternative beam tune (low energy and medium energy) and runtime combinations for constraining the sterile parameter space. We show that charged current and neutral current interactions over the near and far detector at DUNE allow for an improved sensitivity for a wide range of sterile neutrino mass splittings.
description: v2: matches the published version
title: [Post-print] Direct analysis of naphthenic acids in constructed wetland samples by condensed phase membrane introduction mass spectrometry
Creators: name: Duncan, Kyle D.
name: Richards, Larissa C.
name: Monaghan, Joseph
name: Simair, Monique C.
name: Ajaero, Chukwuemeka
name: Peru, Kerry M.
name: Friesen, Vanessa
name: McMartin, Dena W.
name: Headley, John V.
name: Gill, Chris G.
name: Krogh, Erik T.
Publisher: name: Elsevier
Year: 2020

description: This is an accepted manuscript version of an article published as: Duncan, K.D., Richards, L.C., Monaghan, J., Simair, M.C., Ajaero, C., Peru, K.M., Friesen, V., McMartin, D.W., Headley, J.V., Gill, C.G., & Krogh, E.T. (2020). Direct analysis of naphthenic acids in constructed wetland samples by condensed phase membrane introduction mass spectrometry. Science of the Total Environment, 716, 1-8. https://doi.org/10.1016/j.scitotenv.2020.137063
description: The application of direct mass spectrometry techniques to the analysis of complex samples has a number of advantages including reduced sample handling, higher sample throughput, in situ process monitoring, and the potential for adaptation to on-site analysis. We report the application of a semi-permeable capillary hollow fibre membrane probe (immersed directly into an aqueous sample) coupled to a triple quadrupole mass spectrometer by a continuously flowing methanol acceptor phase for the rapid analysis of naphthenic acids with unit mass resolution. The intensity of the naphthenic acid-associated peaks in the mass spectrum are normalized to an internal standard in the acceptor phase for quantitation and the relative abundance of the peaks in the mass spectrum are employed to monitor compositional changes in the naphthenic acid mixture using principle component analysis. We demonstrate the direct analysis of a synthetic oil sands process-affected water for classical naphthenic acids (CnH2n+zO2) as they are attenuated through constructed wetlands containing sedge (Carex aquatilis), cattail (Typha latifolia), or bulrush (Schoenoplectus acutus). Quantitative results for on-line membrane sampling compare favourably to those obtained by solid-phase extraction high-resolution mass spectrometry. Additionally, chemometric analysis of the mass spectra indicates a clear discrimination between naphthenic acid-influenced and natural background waters. Furthermore, the compositional changes within complex naphthenic acid mixtures track closely with the degree of attenuation. Overall, the technique is successful in following changes in both the concentration and composition of naphthenic acids from synthetic oil sands process-affected waters, with the potential for high throughput screening and environmental forensics.
Gevrey solutions of the irregular hypergeometric system associated with an affine monomial curve
Creators: name: Fernandez-Fernandez, M. C.
name: Castro-Jimenez, F. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 32C38, 13N10 (Primary) 13P10, 14F10, 14M25 (Secondary)

description: We describe the Gevrey series solutions at singular points of the irregular hypergeometric system (GKZ system) associated with an affine monomial curve. We also describe the irregularity complex of such a system with respect to its singular support. We use restriction and some results in D-module theory to reduce our study to the two dimensional case.
description: Most of the results of this paper are contained in arXiv:0804.0809v2 [math.AG]. Some references added. Corrected typos
Fergusobia Currie 1937
Creators: name: Davies, Kerrie A.
name: Ye, Weimin
name: Taylor, Gary S.
name: Scheffer, Sonja
name: Bartholomaeus, F.
name: Giblin-Davis, Robin M.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Tylenchida
Fergusobiidae
Fergusobia

description: Fergusobia Currie 1937 (Christie 1941)   Fergusobia Currie 1937: 158. Type species: Anguillulina (Fergusobia) tumifaciens Currie 1937, by original designation (type lost); neotype established by Davies 2014 (in Davies et al. 2014b).
description: Published as part of Davies, Kerrie A., Ye, Weimin, Taylor, Gary S., Scheffer, Sonja, Bartholomaeus, F. & Giblin-Davis, Robin M., 2018, Nematodes from galls on Myrtaceae. XI. Descriptions of five new species of Fergusobia from Australia, pp. 1-31 in Zootaxa 4399 (1) on page 3, DOI: 10.11646/zootaxa.4399.1.1, http://zenodo.org/record/1206406
Constructing Invariant Subspaces as Kernels of Commuting Matrices
Creators: name: Cowen, Carl C.
name: Johnston, William
name: Wahl, Rebecca G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 15A20, 47A15

description: Given an n by n matrix A over the complex numbers and an invariant subspace L, this paper gives a straightforward formula to construct an n by n matrix N that commutes with A and has L equal to the kernel of N. For Q a matrix putting A into Jordan canonical form J = RAQ with R the inverse of Q, we get N = RM$ where the kernel of M is an invariant subspace for J with M commuting with J. In the formula M = P ZVW with V the inverse of a constructed matrix T and W the transpose of P, the matrices Z and T are m by m and P is an n by m row selection matrix. If L is a marked subspace, m = n and Z is an n by n block diagonal matrix, and if L is not a marked subspace, then m > n and Z is an m by m near-diagonal block matrix. Strikingly, each block of Z is a monomial of a finite-dimensional backward shift. Each possible form of Z is easily arranged in a lattice structure isomorphic to and thereby displaying the complete invariant subspace lattice L(A) for A.
description: 12 pages with two illustrations of invariant subspace lattice diagrams
The effect of impurities on spin polarized Zeeman bound states in dilute magnetic semiconductor-superconductor hybrids
Creators: name: Lin, Shi-Hsin
name: Rappoport, Tatiana G.
name: Berciu, Mona
name: Janko, Boldizsar
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the effect of single and multiple impurities on the Zeeman-localized, spin polarized bound states in dilute magnetic semiconductor hybrid system. Such bound states appear whenever a dilute magnetic semiconductor showing giant Zeeman effect is exposed to an external magnetic field showing nanoscale inhomogeneity. We consider the specific example of a superconductor-dilute magnetic semiconductor hybrid, calculate the energy spectrum and the wave functions of the bound states in the presence of a single impurity, and monitor the evolution of the bound state as a function of the impurity strength and impurity location with respect to the center of the Zeeman trapping potential. Our results have important experimental implications as they predict robust spin textures even for than than ideal samples. We find that for all realistic impurity strengths the Zeeman bound state survives the presence of the impurity. We also investigate the effect of a large number of impurities and perform ensemble averages with respect to the impurity locations. We find that the spin polarized Zeeman bound states are very robust, and they remain bound to the external field inhomogeneity throughout the experimentally relevant region of impurity concentration and scattering strength.
description: 9 pages, 9 figures. submitted to Physical Review B
Femtoscopic study of the $ Ωα$ interaction in heavy-ion collisions
Creators: name: Etminan, Faisal
Publisher: name: arXiv
Year: 2024
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The two-particle momentum correlation between the Omega-baryon ($Ω$) and the $^{4}He (α) $ in high-energy heavy ion collisions is explored.
 Such correlations as an alternative source of information can help us further understand the interaction between $ Ω$ and nucleons (N).
 $ Ωα$ potentials in the single-folding potential approach are constructed by employing two different available $ΩN $ interactions in $^{5}S_{2}$ channel, i.e, one is based on the (2 + 1)-flavor lattice QCD simulations near the physical point by the HAL QCD collaboration, and another is based on the meson exchanges with effective Lagrangian, where in the latter case coupled channels effect is considered.
 It is found that the correlation functions at small size source depends on the used potential model. This implicitly means that at high density nuclear medium, $ Ωα$ momentum correlation could drive the feature of $ ΩN $ interactions.
 Moreover, by extracting the scattering length and the effective range from obtained $ Ωα$ potentials, the correlation functions are calculated within the Lednicky-Lyuboshits (LL) formalism.
 It is shown that since the $Ωα$ has large interaction range, the LL formula leads to different results at small source size.
description: 14 pages, 9 Figures, 1 Table. arXiv admin note: text overlap with arXiv:2406.03572
Revisiting the hexagonal lattice: on optimal lattice circle packing
Creators: name: Fukshansky, Lenny
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 11H06, 11H31, 52C05, 52C15, 05B40

description: In this note we give a simple proof of the classical fact that the hexagonal lattice gives the highest density circle packing among all lattices in $R^2$. With the benefit of hindsight, we show that the problem can be restricted to the important class of well-rounded lattices, on which the density function takes a particularly simple form. Our proof emphasizes the role of well-rounded lattices for discrete optimization problems.
description: 8 pages, 1 figure; to appear in Elemente der Mathematik
Tensile Strength of a New Recyclable and Environment Friendly Composite Material
Creators: name: Abdulsada, Shaymaa Abbas
name: I.Al-Mosawi, Ali
Publisher: name: figshare
Year: 2021
Subjects: subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: A fiber-reinforced polymer (FRP) is a composite material consisting of a polymer matrix embedded with high-strength fibers, such as glass, aramid, and carbon . Results showed that samples containing reed fiber have high tensile strength compared to glass fiber. These strengths increase with an increasing amount of reed fiber until 10 wt.% , when becoming the amount of addition 15 wt.% tensile strength decreases little.
The Harvest of Modernization
Creators: name: Eellend, Johan
Publisher: name: Rural History Yearbook
Year: 2022

description: In diesem Artikel werden die Leitideen der estnischen Bauernbewegung sowie die politischen Praktiken analysiert, mit Hilfe derer sie umgesetzt werden sollten. Seit den 1860er Jahren erlebte die estnische Gesellschaft innerhalb des Russischen Reiches tiefgreifende soziale und ökonomische Veränderungen. Die Entstehungsbedingungen der estnischen Bauernbewegung finden sich in der Zunahme einer bäuerlichen Öffentlichkeit sowie der politischen Mobilisierung der Bauern durch die Zusammenführung der sozialen und na- tionalen Frage. Damit grenzte sie sich sowohl von liberalen, als auch von sozialistischen Staats- und Wirtschaftsmodellen ab. In den Netzwerken landwirtschaftlicher Verbände und Genossenschaften (z.B. auf den Landwirtschaftlichen Kongressen 1899 und 1905) wurden Werte und Vorstellungen von Staat und Gesellschaft formuliert, die prägend auch für die estnische Gesellschaft der Zwischenkriegszeit waren.
description: Rural History Yearbook, Bd. 7 (2010): Transforming Rural Societies. Agrarian Property and Agrarianism in East Central Europe in the Nineteenth and Twentieth Centuries
ESTUDO COMPARATIVO DO IMPACTO AMBIENTAL DOS PROJETOS DE DESTINAÇÃO FINAL DE RESÍDUOS DE RESÍDUOS SÓLIDOS URBANOS, NO CONTEXTO BAIXADA SANTISTA.
Creators: name: Torres, Bruno Eduardo Baptista Rodrigues
name: Bet, Luis Gustavo
name: Martins, Fernando Ramos
Publisher: name: figshare
Year: 2022
Subjects: Environmental Science

description: The issue of urban solid waste (USW) has become one of the most present problems in current administrations. Even ten years after the institution of Federal Law No. 12,305 / 10, the National Solid Waste Policy (PNRS), several gaps still require diligence to put more sustainable and responsible guidelines and values into practice. In this scenario, the Baixada Santista region faces decisive and complex problems concerning the management of urban solids, as the Sítio das Neves, the largest landfill in the region, has practically exhausted its life cycle requiring a new disposal solution meeting the region specifics features. Some proposed proposals generate disagreement among decision-makers, civil society, and the private sector about implementing the most sustainable solution. The present study investigated some proposed solutions based on a comparative methodology that uses the equivalent CO2 emissions as a central variable. The solutions analyzed were: the Energy Recovery Unit Valoriza Santos, expansion of the Sítio das Neves Landfill and waste transfer to intercity Disposition into a landfill located Mauá – SP, 30km away from the largest city of Baixada Santista region. In general, the study concludes that there is not only a single solution to solve the solid waste management in the Baixada Santista (BS) context, but multiple solutions that can be better developed within a chain of achievements.
Commutators and products of Lie ideals of prime rings
Creators: name: Lee, Tsiu-Kwen
name: Lin, Jheng-Huei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16N60 (Primary), 16W10 (Secondary)

description: Motivated by some recent results on Lie ideals, it is proved that if $L$ is a Lie ideal of a simple ring $R$ with center $Z(R)$, then $L\subseteq Z(R)$, $L=Z(R)a+Z(R)$ for some noncentral $a\in L$, or $[R, R]\subseteq L$, which gives a generalization of a classical theorem due to Herstein. We also study commutators and products of noncentral Lie ideals of prime rings. Precisely, let $R$ be a prime ring with extended centroid $C$. We completely characterize Lie ideals $L$ and elements $a$ of $R$ such that $L+aL$ contains a nonzero ideal of $R$. Given noncentral Lie ideals $K, L$ of $R$, it is proved that $[K, L]=0$ if and only if $KC=LC=Ca+C$ for any noncentral element $a\in L$. As a consequence, we characterize noncentral Lie ideals $K_1,\ldots,K_m$ with $m\geq 2$ such that $K_1K_2\cdots K_m$ contains a nonzero ideal of $R$. Finally, we characterize noncentral Lie ideals $K_j$'s and $L_k$'s satisfying $\big[K_1K_2\cdots K_m, L_1L_2\cdots L_n\big]=0$ from the viewpoint of centralizers.
Josephson current in strongly correlated double quantum dots
Creators: name: Zitko, Rok
name: Lee, Minchul
name: Lopez, Rosa
name: Aguado, Ramon
name: Choi, Mahn-Soo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the transport properties of a serial double quantum dot (DQD) coupled to two superconducting leads, focusing on the Josephson current through the DQD and the associated 0-$π$ transitions which result from the subtle interplay between the superconductivity, the Kondo physics, and the inter-dot superexchange interaction. We examine the competition between the superconductivity and the Kondo physics by tuning the relative strength $Δ/T_K$ of the superconducting gap $Δ$ and the Kondo temperature $T_K$, for different strengths of the superexchange coupling determined by the interdot tunneling $t$ relative to the dot level broadening $Γ$. We find strong renormalization of $t$, a significant role of the superexchange coupling $J$, and a rich phase diagram of the 0 and $π$-junction regimes. In particular, when both the superconductivity and the exchange interaction are in close competion with the Kondo physics ($Δ\sim J\sim T_K$), there appears an island of $π'$-phase at large values of the superconducting phase difference.
description: 4 pages, 4 figures
Machine Learning Prediction of Critical Cooling Rate for Metallic Glasses From Expanded Datasets and Elemental Features
Creators: name: Afflerbach, Benjamin T.
name: Francis, Carter
name: Schultz, Lane E.
name: Spethson, Janine
name: Meschke, Vanessa
name: Strand, Elliot
name: Ward, Logan
name: Perepezko, John H.
name: Thoma, Dan
name: Voyles, Paul M.
name: Szlufarska, Izabela
name: Morgan, Dane
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We use a random forest model to predict the critical cooling rate (RC) for glass formation of various alloys from features of their constituent elements. The random forest model was trained on a database that integrates multiple sources of direct and indirect RC data for metallic glasses to expand the directly measured RC database of less than 100 values to a training set of over 2,000 values. The model error on 5-fold cross validation is 0.66 orders of magnitude in K/s. The error on leave out one group cross validation on alloy system groups is 0.59 log units in K/s when the target alloy constituents appear more than 500 times in training data. Using this model, we make predictions for the set of compositions with melt-spun glasses in the database, and for the full set of quaternary alloys that have constituents which appear more than 500 times in training data. These predictions identify a number of potential new bulk metallic glass (BMG) systems for future study, but the model is most useful for identification of alloy systems likely to contain good glass formers, rather than detailed discovery of bulk glass composition regions within known glassy systems.
Altermagnetism from interaction-driven itinerant magnetism
Creators: name: Giuli, Samuele
name: Mejuto-Zaera, Carlos
name: Capone, Massimo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Altermagnetism, a new phase of collinear spin-order sharing similarities with antiferromagnets and ferromagnets, has introduced a new guiding principle for spintronic/thermoelectric applications due to its direction-dependent magnetic properties. Fulfilling the promise to exploit altermagnetism for device design depends on identifying materials with tuneable transport properties. The search for intrinsic altermagnets has so far focused on the role of anisotropy in the crystallographic symmetries and in the bandstructure. Here, we present a different mechanism that approaches this goal by leveraging the interplay between a Hubbard local repulsion and the itinerant magnetism given by the presence of van Hove singularities. We show that altermagnetism is stable for a broad range of interactions and dopings and we focus on tunability of the spin-charge conversion ratio.
description: 5 pages, 3 figures
Towards testing a dark matter candidate that emerges from the scalar ether theory
Creators: name: Arminjon, Mayeul
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: According to a scalar theory of gravity with a preferred frame, electromagnetism in the presence of a gravitational field implies that there is an additional energy tensor, which might contribute to dark matter. The expression of this tensor is determined by a mere scalar $p$, that depends on the EM field and (for a weak field) on the Newtonian gravitational field. We briefly recall why this tensor arises and how the EM field in a galaxy can be calculated. The data fields that enter the PDE for the scalar field $p$ oscillate very quickly in space and time, as does the EM field. This prevents integration of that PDE at the relevant galactic scale. Therefore, a homogenization of that PDE has to be operated. We discuss in some detail three possible ways of applying the homogenization theory to that PDE: time, space, or spacetime homogenization. The second and third ways may lead to feasible, albeit heavy calculations.
description: 17 pages. Text of a talk given at the 13th Biennial Conference on Classical and Quantum Relativistic Dynamics of Particles and Fields, IARD 2022 (Prague, June 2022)
Daniele Brigadoi Cologna, Aspettando la fine della guerra: Lettere dei prigionieri cinesi nei campi di concentramento fascisti (Roma: Carocci, 2019).
Creators: name: Gabusi, Giuseppe
Publisher: name: OrizzonteCina
Year: 2020

description: N/A
description: OrizzonteCina, V. 11 N. 1 (2020): Taiwan: prospettive al di là dello stretto
Thermal Evolution of the Non Supersymmetric Metastable Vacua in N=2 SU(2) SYM Softly Broken to N=1
Creators: name: Katifori, Eleni
name: Pastras, Georgios
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been shown that four dimensional N=2 gauge theories, softly broken to N=1 by a superpotential term, can accommodate metastable non-supersymmetric vacua in their moduli space. We study the SU(2) theory at high temperatures in order to determine whether a cooling universe settles in the metastable vacuum at zero temperature. We show that the corrections to the free energy because of the BPS dyons are such that may destroy the existence of the metastable vacuum at high temperatures. Nevertheless we demonstrate the universe can settle in the metastable vacuum, provided that the following two conditions are hold: first the superpotential term is not arbitrarily small in comparison to the strong coupling scale of the gauge theory, and second the metastable vacuum lies in the strongly coupled region of the moduli space.
description: 32 pages, 30 figures
Sinofobia, xenofobia, politica di potenza: l’inquietante retaggio dell’anno gēngzǐ
Creators: name: Brigadoi Cologna, Daniele
Publisher: name: OrizzonteCina
Year: 2020

description: N/A
description: OrizzonteCina, V. 11 N. 1 (2020): Taiwan: prospettive al di là dello stretto
p--$ϕ$ femtoscopic correlation analysis using a dynamical model
Creators: name: Kuroki, Kenshi
name: Hirano, Tetsufumi
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We analyse the p--$ϕ$ correlation functions in high-multiplicity proton+proton collisions at the LHC using a dynamical model, DCCI2, and discuss the effects of collision dynamics on the p--$ϕ$ femtoscopic study. Collision dynamics, such as collective expansion and hadronic rescatterings, leads to the relative momentum-dependent non-Gaussian source functions. This results in deviations in the correlation functions compared to those using the Gaussian source function adopted in existing studies. Our analysis shows the importance of using the source functions that reflect more realistic collision dynamics for future precision analysis of hadron interactions via femtoscopy.
description: 4 pages, 2 figures, proceedings of the 21st International Conference on Strangeness in Quark Matter (SQM 2024), 3-7 June 2024, Strasbourg, France
Taiwan negli orizzonti italiani
Creators: name: Giglio, Davide
Publisher: name: OrizzonteCina
Year: 2020

description: In spite of its reduced geographic surface, Taiwan is a major economic player both in Asia and worldwide, and is strongly engaged in international trade. A key sector which places Taiwan at the centre of the international trade arena is the ICT industry, which leads to a global dependency on Taiwanese high-tech companies, widely renowned for their high productivity as well as for their interest in export. Among those countries who view Taiwan as a strategic economic partner is Italy, which ranks as Taiwan’s 5th EU commercial partner and is gradually consolidating its economic presence on the island: among the most successful Italian industries currently present in Taiwan are the mechanical and pharmaceutical sectors, alongside the more popular Italian food and fashion. Although the Italian presence in Taiwan is increasingly significant, the article illustrates how it is important to overcome the information deficit present in Italy on the Taiwanese local economic reality. Ultimately, Italian investment activity in Taiwan is still lacking, together with the projection of an image of Italy as a technological and innovation power.
description: OrizzonteCina, V. 11 N. 1 (2020): Taiwan: prospettive al di là dello stretto
A non-divisorial variety
Creators: name: Fraga, Robert Joseph
Publisher: name: University of British Columbia
Year: 2011

description: When divisorial varieties were first introduced, the question immediately arose whether there are any varieties which are not divisorial. This work answers the question in the affirmative. We prove here that the non-projective variety M defined by Nagata in Memoirs of the College of Science, University of Kyoto, Series A, Vol. XXX, Mathematics No. 3, 1957, pp. 231-235 is, in fact, non-divisorial. The work is organized as follows: We first discuss briefly the concepts relating to the notion of divisorial variety. Next there is a description of Nagata's variety in which we include the proofs of statements which we shall need for the subsequent theorems. The preliminary results are of two types: first we prove several lemmas concerning the dominance of local rings of points on the variety M. Second we prove that divisors whose varieties contain the vertex of the affine cone V used in Nagata's example must intersect the line at infinity of the cone at a point(s) whose local ring dominates the local ring of the vertex of the cone Vσ under the transformation σ defined by Nsgata. This result indicates strongly that the variety M = VU Vσ is not divisorial. For the proof that this is, in fact, the case, we prove in detail a strictly algebraic result to the effect that the (prime) ideals associated with the irreducible components of a divisor which do not contain the vertex P of the cone V are principal. With this result, we finally show by contradiction that M is not divisorial.
Conifold Transitions for Complete Intersection Calabi-Yau 3-folds in Products of Projective Spaces
Creators: name: Xu, Jinxing
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove that a generic complete intersection Calabi-Yau 3-fold defined by sections of ample line bundles on a product of projective spaces admits a conifold transition to a connected sum of S^{3} \times S^{3}. In this manner, we obtain complex structures with trivial canonical bundles on some connected sums of S^{3} \times S^{3}. This construction is an analogue of that made by Friedman, Lu and Tian who used quintics in P^{4}.
On the expressiveness and spectral bias of KANs
Creators: name: Wang, Yixuan
name: Siegel, Jonathan W.
name: Liu, Ziming
name: Hou, Thomas Y.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Kolmogorov-Arnold Networks (KAN) \cite{liu2024kan} were very recently proposed as a potential alternative to the prevalent architectural backbone of many deep learning models, the multi-layer perceptron (MLP). KANs have seen success in various tasks of AI for science, with their empirical efficiency and accuracy demostrated in function regression, PDE solving, and many more scientific problems.
 In this article, we revisit the comparison of KANs and MLPs, with emphasis on a theoretical perspective. On the one hand, we compare the representation and approximation capabilities of KANs and MLPs. We establish that MLPs can be represented using KANs of a comparable size. This shows that the approximation and representation capabilities of KANs are at least as good as MLPs. Conversely, we show that KANs can be represented using MLPs, but that in this representation the number of parameters increases by a factor of the KAN grid size. This suggests that KANs with a large grid size may be more efficient than MLPs at approximating certain functions. On the other hand, from the perspective of learning and optimization, we study the spectral bias of KANs compared with MLPs. We demonstrate that KANs are less biased toward low frequencies than MLPs. We highlight that the multi-level learning feature specific to KANs, i.e. grid extension of splines, improves the learning process for high-frequency components. Detailed comparisons with different choices of depth, width, and grid sizes of KANs are made, shedding some light on how to choose the hyperparameters in practice.
description: 20 pages, 7 figures
Skellam shrinkage: Wavelet-based intensity estimation for inhomogeneous Poisson data
Creators: name: Hirakawa, Keigo
name: Wolfe, Patrick J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: The ubiquity of integrating detectors in imaging and other applications implies that a variety of real-world data are well modeled as Poisson random variables whose means are in turn proportional to an underlying vector-valued signal of interest. In this article, we first show how the so-called Skellam distribution arises from the fact that Haar wavelet and filterbank transform coefficients corresponding to measurements of this type are distributed as sums and differences of Poisson counts. We then provide two main theorems on Skellam shrinkage, one showing the near-optimality of shrinkage in the Bayesian setting and the other providing for unbiased risk estimation in a frequentist context. These results serve to yield new estimators in the Haar transform domain, including an unbiased risk estimate for shrinkage of Haar-Fisz variance-stabilized data, along with accompanying low-complexity algorithms for inference. We conclude with a simulation study demonstrating the efficacy of our Skellam shrinkage estimators both for the standard univariate wavelet test functions as well as a variety of test images taken from the image processing literature, confirming that they offer substantial performance improvements over existing alternatives.
description: 27 pages, 8 figures, slight formatting changes; submitted for publication
Classical and quantum Lagrangian field theories with boundary
Creators: name: Cattaneo, Alberto S.
name: Mnev, Pavel
name: Reshetikhin, Nicolai
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Topology (math.AT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: This note gives an introduction to Lagrangian field theories in the presence of boundaries. After an overview of the classical aspects, the cohomological formalisms to resolve singularities in the bulk and in the boundary theories (the BV and the BFV formalisms, respectively) are recalled. One of the goals here (and in [arXiv:1201.0290]) is to show how the latter two formalisms can be put together in a consistent way, also in view of perturbative quantization.
description: 24 pages
The targum (1968:Feb. 01 - 1968:Feb. 29)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1968

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
“L’isola di fronte alla Cina”: la sfida della sicurezza di Taiwan
Creators: name: Bozzato, Fabrizio
Publisher: name: OrizzonteCina
Year: 2020

description: On account of its size, population and capabilities, a middle power like Taiwan inevitably finds itself characterized by fewer resources, as well as more limited room for manoeuvre and margins of projection, vis-à-vis the larger states in the region. Taiwan’s security challenge, therefore, is primarily one of a structural nature. In addition, the Republic of China (ROC), as Taiwan officially calls itself, with its complex history and geopolitical peculiarities, experiences a unique security paradigm. Starting from such premises, this article examines the security dynamics of the island, in crucial phases of its recent history, under the looming territorial ambitions of the People's Republic of China (PRC). Over time, different Taiwanese leaderships have been striving to manage and adjust to the changing Cross-Strait security environment. Presently, Taiwan continues to adroitly pursue its national security, and preserve its very existence as a polity, in a strategic game in which the main players remain China and the United States of America.
description: OrizzonteCina, V. 11 N. 1 (2020): Taiwan: prospettive al di là dello stretto
Cosmic Evolution of Black Holes and Spheroids. IV. The BH Mass - Spheroid Luminosity Relation
Creators: name: Bennert, Vardha Nicola
name: Treu, Tommaso
name: Woo, Jong-Hak
name: Malkan, Matthew A.
name: Bris, Alexandre Le
name: Auger, Matthew W.
name: Gallagher, Sarah
name: Blandford, Roger D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: From high-resolution images of 23 Seyfert-1 galaxies at z=0.36 and z=0.57 obtained with the Near Infrared Camera and Multi-Object Spectrometer on board the Hubble Space Telescope (HST), we determine host-galaxy morphology, nuclear luminosity, total host-galaxy luminosity and spheroid luminosity. Keck spectroscopy is used to estimate black hole mass (M_BH). We study the cosmic evolution of the M_BH-spheroid luminosity (L_sph) relation. In combination with our previous work, totaling 40 Seyfert-1 galaxies, the covered range in BH mass is substantially increased, allowing us to determine for the first time intrinsic scatter and correct evolutionary trends for selection effects. We re-analyze archival HST images of 19 local reverberation-mapped active galaxies to match the procedure adopted at intermediate redshift. Correcting spheroid luminosity for passive luminosity evolution and taking into account selection effects, we determine that at fixed present-day V-band spheroid luminosity, M_BH/L_sph \propto (1+z)^(2.8+/-1.2). When including a sample of 44 quasars out to z=4.5 taken from the literature, with luminosity and BH mass corrected to a self-consistent calibration, we extend the BH mass range to over two orders of magnitude, resulting in M_BH/L_sph \propto (1+z)^(1.4+/-0.2). The intrinsic scatter of the relation, assumed constant with redshift, is 0.3+/-0.1 dex (<0.6 dex at 95% CL). The evolutionary trend suggests that BH growth precedes spheroid assembly. Interestingly, the M_BH-total host-galaxy luminosity relation is apparently non-evolving. It hints at either a more fundamental relation or that the spheroid grows by a redistribution of stars. However, the high-z sample does not follow this relation, indicating that major mergers may play the dominant role in growing spheroids above z~1.
description: 39 pages, 11 figures. Accepted for publication in the Astrophysical Journal
The Mirror of Agrarian Modernity
Creators: name: Eriksson, Fredrik
name: Eellend, Johan
name: Wawrzeniuk, Piotr
Publisher: name: Rural History Yearbook
Year: 2022

description: Im Zentrum dieses Artikels stehen Vorstellungen von Moderne und Rationalität in den Genossenschaftsbewegungen und Agrarparteien Schwedens, Galiziens und Estlands um die Wende zum 20. Jahrhundert. In vergleichender Perspektive wird analysiert, wie diese Leitbegriffe in der Agrarpresse Programme und Projekte verschiedener gesellschaftlicher Teilsysteme (Wissenschaft, Bildung, Nationalbewegung) strukturierten. Die von den Autoren ausgewählten Zeitschriften reflektieren die Lage in unterschiedlichen Regionen und Teilbereichen der Agrarwirtschaft. Die These lautet, dass „Modernität“ fast durchgängig als ein maskulines Projekt verstanden wurde. Unterschiede bezogen sich vor allem auf die politischen Funktionen von Agrargenossenschaften, die in Estland und Galizien stark national, während sie in Schweden konservativ gegen die Linke konfiguriert waren. In einem zweiten Teil widmen sich die Autoren einer Sozialstudie der Produzenten und Leser der herangezogenen Zeitschriften.
description: Rural History Yearbook, Bd. 7 (2010): Transforming Rural Societies. Agrarian Property and Agrarianism in East Central Europe in the Nineteenth and Twentieth Centuries
Discrete Self Similarity in Filled Type I Strong Explosions
Creators: name: Yalinewich, Almog
name: Sari, Re'em
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present new solutions to the strong explosion problem in a non power law density profi{}le. The unperturbed self similar solutions developed by Sedov, Taylor and Von Neumann describe strong Newtonian shocks propagating into a cold gas with a density profile falling off as $r^{-ω}$, where $ω\le\frac{7-γ}{γ+1}$ (filled type I solutions), and $γ$ is the adiabatic index of the gas. The perturbations we consider are spherically symmetric and log periodic with respect to the radius. While the unperturbed solutions are continuously self similar, the log periodicity of the density perturbations leads to a discrete self similarity of the perturbations, i.e., the solution repeats itself up to a scaling at discrete time intervals. We discuss these solutions and verify them against numerical integrations of the time dependent hydrodynamic equations. This is an extension of a previous investigation on type II solutions and helps clarifying boundary conditions for perturbations to type I self similar solutions.
Autonomous patch clamp robot for functional characterization of neurons in vivo
Creators: name: Holst, Gregory L.
name: Stoy, William
name: Yang, Bo
name: Kolb, Ilya
name: Kodandaramaiah, Suhasa B.
name: Li, Lu
name: Knoblich, Ulf
name: Zeng, Hongkui
name: Haider, Bilal
name: S. Boyden, Edward
name: R. Forest, Craig
Publisher: name: figshare
Year: 2019
Subjects: classificationCode: 320999
subject: Neurosciences not elsewhere classified
classificationCode: 320801
subject: Cell physiology

description: Supplemental Video. Autonomous patch clamp robot. This is a fully automated patch clamp robot that can be utilized for functional and consecutive characterization of neurons in vivo. Up to 40 pipettes can be loaded into the carousel before experimentation begins. Pipettes loaded into the carousel are automatically filled, inserted into the brain, localized to a cell, used for patch clamping, and discarded.
Supplemental Table S1. Statistical Tests Comparing Properties for Different Cell Types. P-values when comparing populations with a two-tailed Student’s T-test, and the median absolute deviation ratio outlier test r = |(x_i-M)/MAD| for identifying outliers where x_i is the value being tested, M is the median value of the population, and MAD is the median absolute deviation (Leys 2013). A p < 0.05 was classified as significant and the SOM+ and/or PV+ value was identified as an outlier if the median absolute deviation ratio was > 3.
Supplemental Table S2. Statistical Tests for Evaluating Degree of Visual Drive: Spiking. Data used to test the statistical significance of the spiking behavior. Periods of visual stimulation are compared to periods of blank stimuli using a Poisson rate ratio exact test with a null hypothesis that the spike rates are equal between the two groups.
Supplemental Table S3. Statistical Tests for Evaluating Degree of Visual Drive: Subthreshold. P-values when comparing the integral of the subthreshold activity during the 500 ms before and after stimulus onset. Integral was performed after spikes were removed.
An accretion disc origin for the `X-ray broad line region' in 1H0707-495
Creators: name: Blustin, A. J.
name: Fabian, A. C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use a 380 ks XMM-Newton high-resolution RGS spectrum to look for narrow spectral features from the nuclear environment of 1H0707-495. We do not find any evidence of a line-of-sight ionized wind (warm absorber). We do, however, detect broad emission lines, of width ~5000 km s^-1, consistent with O VIII Ly-alpha, N VII Ly-alpha, C VI Ly-alpha and a Fe XIX/Fe XX/Ne IX He-alpha blend. Intriguingly, these lines have both blueshifted and redshifted components, whose velocity shifts are consistent with an origin in an accretion disc at ~1600 R_g from the black hole. The features can be interpreted as the narrow line cores of the disc reflection spectrum, thus providing independent support for the discline interpretation of the X-ray spectrum of 1H0707-495. We discuss the relevance of our findings for the `X-ray broad line region' in other Seyferts, and for the origins of the optical broad line region itself.
description: 5 pages, 4 figures, accepted by MNRAS Letters
Local Variation as a Statistical Hypothesis Test
Creators: name: Baltaxe, Michael
name: Meer, Peter
name: Lindenbaum, Michael
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The goal of image oversegmentation is to divide an image into several pieces, each of which should ideally be part of an object. One of the simplest and yet most effective oversegmentation algorithms is known as local variation (LV) (Felzenszwalb and Huttenlocher 2004). In this work, we study this algorithm and show that algorithms similar to LV can be devised by applying different statistical models and decisions, thus providing further theoretical justification and a well-founded explanation for the unexpected high performance of the LV approach. Some of these algorithms are based on statistics of natural images and on a hypothesis testing decision; we denote these algorithms probabilistic local variation (pLV). The best pLV algorithm, which relies on censored estimation, presents state-of-the-art results while keeping the same computational complexity of the LV algorithm.
Rotation Curve and Mass Distribution in the Galaxy from the Velocities of Objects at Distances up to 200 kpc
Creators: name: Bajkova, A. T.
name: Bobylev, V. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Three three-component (bulge, disk, halo) model Galactic gravitational potentials differing by the expression for the dark matter halo are considered. The central (bulge) and disk components are described by the Miyamoto-Nagai expressions. The Allen-Santill'an (I), Wilkinson-Evans (II), and Navarro-Frenk-White (III) models are used to describe the halo. A set of present-day observational data in the range of Galactocentric distances R from 0 to 200 kpc is used to refine the parameters of these models. The model rotation curves have been fitted to the observed velocities by taking into account the constraints on the local matter density ρ_\odotand the force K_{z=1.1} acting perpendicularly to the Galactic plane. The Galactic mass within a sphere of radius 50 kpc, M_G (R<=50 kpc)=(0.41+/-0.12)x10^12 M_\odot, is shown to satisfy all three models. The differences between the models become increasingly significant with increasing radius R. In model I, the Galactic mass within a sphere of radius 200 kpc turns out to be greatest among the models considered, M_G (R<=200 kpc)=(1.45+/-0.30)x10^12 M_\odot, and the smallest value has been found in model II, M_G (R<=200 kpc)=(0.61+/-0.12)x10^{12} M_\odot. In our view, model III is the best one among those considered, because it ensures the smallest residual between the data and the constructed model rotation curve provided that the constraints on the local parameters hold with a high accuracy. Here, the Galactic mass is M_G (R<=200 kpc)=(0.75+/-0.19)x10^12 M_\odot. A comparative analysis with the models by Irrgang et al. (2013), including those using the integration of orbits for the two globular clusters NGC 104 and NGC 1851 as an example, has been performed. The third model is shown to have subjected to a significant improvement.
description: 22 pages, 7 figures, 2 tables
L’evoluzione del bipartitismo taiwanese, tra fratture politiche e incentivi istituzionali
Creators: name: Carteny, Giuseppe
Publisher: name: OrizzonteCina
Year: 2020

description: This article explores the origins of the Taiwanese party system, its evolution, and its current structure. After assessing the social and political dynamics leading to the early democratic party system of the1990s, the specific factors that underpin the current party system are discussed. What is argued is that the current two-party configuration is the product of two sets of factors. First, the dominance of a single dimension of political competition, namely the ‘independence-unification’ axis, a social and political cleavage determined by Taiwan's crucial relationship with China. Second, the existence of institutional incentives and constraints, deriving from the interplay of (1) a majoritarian, plurality electoral system regulating the competition for Taiwan’s presidency, and (2) the existence of mixed but mostly majoritarian electoral rules for the election of the legislative assembly. The article ends with a discussion of the resilience of the Taiwanese party system and its possible evolution.
description: OrizzonteCina, V. 11 N. 1 (2020): Taiwan: prospettive al di là dello stretto