cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Continuous-time multi-state capture-recapture models
Creators: name: Mews, Sina
name: Langrock, Roland
name: King, Ruth
name: Quick, Nicola
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applications (stat.AP)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Multi-state capture-recapture data comprise individual-specific sighting histories together with information on individuals' states related, for example, to breeding status, infection level, or geographical location. Such data are often analysed using the Arnason-Schwarz model, where transitions between states are modelled using a discrete-time Markov chain, making the model most easily applicable to regular time series. When time intervals between capture occasions are not of equal length, more complex time-dependent constructions may be required, increasing the number of parameters to estimate, decreasing interpretability, and potentially leading to reduced precision. Here we develop a novel continuous-time multi-state model that can be regarded as an analogue of the Arnason-Schwarz model for irregularly sampled data. Statistical inference is carried out by regarding the capture-recapture data as realisations from a continuous-time hidden Markov model, which allows the associated efficient algorithms to be used for maximum likelihood estimation and state decoding. To illustrate the feasibility of the modelling framework, we use a long-term survey of bottlenose dolphins where capture occasion are not regularly spaced through time. Here we are particularly interested in seasonal effects on the movement rates of the dolphins along the Scottish east coast. The results reveal seasonal movement patterns between two core areas of their range, providing information that will inform conservation management.
Magmatic/ hydrothermal interactions at fast spreading mid-ocean ridges : implications on the dynamics of the axial melt lens
Creators: name: France, Lydéric
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Fast-spreading ridges
subject: melt-lens
subject: base of the sheeted-dike complex
subject: Schnell-spreizende ozeanische Spreizungszonen
subject: Schmelz-Linse
subject: Basis des Sheeted-Dike-Komplexes
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: [no abstract]
Interferometry with Bose-Einstein Condensates in Microgravity
Creators: name: Müntinga, H.
name: Ahlers, H.
name: Krutzik, M.
name: Wenzlawski, A.
name: Arnold, S.
name: Becker, D.
name: Bongs, K.
name: Dittus, H.
name: Duncker, H.
name: Gaaloul, N.
name: Gherasim, C.
name: Giese, E.
name: Grzeschik, C.
name: Hänsch, T. W.
name: Hellmig, O.
name: Herr, W.
name: Herrmann, S.
name: Kajari, E.
name: Kleinert, S.
name: Lämmerzahl, C.
name: Lewoczko-Adamczyk, W.
name: Malcolm, J.
name: Meyer, N.
name: Nolte, R.
name: Peters, A.
name: Popp, M.
name: Reichel, J.
name: Roura, A.
name: Rudolph, J.
name: Schiemangk, M.
name: Schneider, M.
name: Seidel, S. T.
name: Sengstock, K.
name: Tamma, V.
name: Valenzuela, T.
name: Vogel, A.
name: Walser, R.
name: Wendrich, T.
name: Windpassinger, P.
name: Zeller, W.
name: van Zoest, T.
name: Ertmer, W.
name: Schleich, W. P.
name: Rasel, E. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Atom interferometers covering macroscopic domains of space-time are a spectacular manifestation of the wave nature of matter. Due to their unique coherence properties, Bose-Einstein condensates are ideal sources for an atom interferometer in extended free fall. In this paper we report on the realization of an asymmetric Mach-Zehnder interferometer operated with a Bose-Einstein condensate in microgravity. The resulting interference pattern is similar to the one in the far-field of a double-slit and shows a linear scaling with the time the wave packets expand. We employ delta-kick cooling in order to enhance the signal and extend our atom interferometer. Our experiments demonstrate the high potential of interferometers operated with quantum gases for probing the fundamental concepts of quantum mechanics and general relativity.
description: 8 pages, 3 figures; 8 pages of supporting material
Architecture-Aware Synthesis of Phase Polynomials for NISQ Devices
Creators: name: de Griend, Arianne Meijer-van
name: Duncan, Ross
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a new algorithm to synthesise quantum circuits for phase polynomials, which takes into account the qubit connectivity of the quantum computer. We focus on the architectures of currently available NISQ devices. Our algorithm generates circuits with a smaller CNOT depth than the algorithms currently used in Staq and tket, while improving the runtime with respect the former.
description: In Proceedings QPL 2022, arXiv:2311.08375. This paper was originally accepted as Submission 38 in QPL2020, but was not included in the proceedings because of a clerical error
Managing metadata in open learning repositories and P2P networks
Creators: name: Dhraief, Hadhami
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Metadata
subject: peer-to-peer networks
subject: query optimization
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::020 | Bibliotheks- und Informationswissenschaft
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: [no abstract]
Milnor-Witt motivic cohomology of complements of hyperplane arrangements
Creators: name: Peng, Keyao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In this paper, we compute the (total) Milnor-Witt motivic cohomology of the complement of a hyperplane arrangement in an affine space as an algebra with given generators and relations. We also obtain some corollaries by realization to classical cohomology.
Magnesiumoxidnanoröhrchen in dynamischen elektrischen Feldern : Car-Parrinello-Molekulardynamik-Untersuchungen an (MgO)n- und Li(MgO)n-Nanoröhrchen
Creators: name: Alznauer, Hans Tobias
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Car-Parrinello molecular dynamic
subject: Li(MgO)n nanotube
subject: time-dependent electric field
subject: Car-Parrinello-Molekulardynamik
subject: Li(MgO)n-Nanoröhrchen
subject: zeitabhängiges elektrisches Feld
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Melting of Wigner-like Lattice of Parallel Polarized Dipoles
Creators: name: Kleinert, H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that a triangular lattice consisting of dipolar molecules pointing orthogonal to the plane undergoes a first-order defect melting transition.
description: 6 pages
Low-inertia centrifugal compressor wheels: Aerodynamic and mechanical design
Creators: name: Fischer, Tore
name: Seume, Joerg R.
Publisher: name: London : SAGE
Year: 2017
Subjects: subject: Centrifugal compressor design
subject: impeller design
subject: low inertia
subject: high flow
subject: computational fluid dynamics
subject: Dewey Decimal Classification::600 | Technik

description: A new centrifugal compressor impeller design approach is presented, focusing on electrically driven compressors for gasoline engine and fuel cell applications. The performance and mechanical integrity are evaluated based on numerical simulations. Additionally, the numerical model is applied to several variations of the diffuser and volute geometries, in order to evaluate stage characteristics for diffuser area ratios of 110% and 150%, volute area ratios from 60% to 90%, and diffuser pinch ratios from 60% to 80%. The preliminary performance results show the capability to achieve a flow range comparable to a larger state-of-the-art impeller, with minor penalties regarding stage efficiency and near surge operating stability.
title: Déploiement d’un programme de prévention des infections liées aux cathéters veineux centraux hors réanimation
Creators: name: Llorens, Mathieu
Publisher: name: Health & Co
Year: 2019

description: Contexte et objectif. Des cas groupés d’infections sur cathéters veineux centraux (CVC) en médecine et chirurgie nous ont conduits à élaborer un programme de prévention. Méthode. Ce programme comportait quatre étapes couvrant toutes les étapes de la vie d’un cathéter. La préparation a permis d’identifier les services à risque et de fixer des objectifs adaptés du Propias. La mise en œuvre a consisté en 1) la généralisation de l’emploi de la chlorhexidine 2% en solution alcoolique et de pansements renforcés ; 2) la mise en œuvre de formations par simulation ; 3) la réalisation d’un film sur la réfection du pansement de cathéters veineux centraux à insertion périphérique (Picc) ; 4) la généralisation de formulaires de surveillance dans le dossier patient informatisé. L’évaluation a porté sur des indicateurs 1) de structure : proportion de professionnels formés ; 2) de processus : évaluation des connaissances sur les CVC et évaluations des pratiques de manipulation de ceux-ci ; 3) de résultats : taux d’infections nosocomiales sur cathéter dans quatre services. Résultats. Nous avons formé 220 professionnels par simulation et amélioré les connaissances des infirmiers formés. Les évaluations de pratique ont permis d’identifier des défauts de manipulations aseptiques. Enfin, nous avons observé une baisse de 20% du taux d’infection sur CVC dans deux services sur quatre. Perspectives. Un nouveau cycle d’actions doit être mis en œuvre pour pérenniser les améliorations. Il devra intégrer l’ensemble du parcours patient.
Statistical inference for discrete-time samples from affine stochastic delay differential equations
Creators: name: Küchler, Uwe
name: Sørensen, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Statistical inference for discrete time observations of an affine stochastic delay differential equation is considered. The main focus is on maximum pseudo-likelihood estimators, which are easy to calculate in practice. A more general class of prediction-based estimating functions is investigated as well. In particular, the optimal prediction-based estimating function and the asymptotic properties of the estimators are derived. The maximum pseudo-likelihood estimator is a particular case, and an expression is found for the efficiency loss when using the maximum pseudo-likelihood estimator, rather than the computationally more involved optimal prediction-based estimator. The distribution of the pseudo-likelihood estimator is investigated in a simulation study. Two examples of affine stochastic delay equation are considered in detail.
description: Published in at http://dx.doi.org/10.3150/11-BEJ411 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Method for Assessing Potential in Distribution Logistics
Creators: name: Groß, B.
name: Fronia, P.
name: Nyhuis, Peter
Publisher: name: Leibniz Universität Hannover
Year: 2014
Subjects: subject: Distribution Logistics
subject: Evaluation of Potential
subject: Methods
subject: Model
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: In addition to the production, which is already frequently optimized, improving the distribution logistics also opens up tremendous potential for increasing an enterprise’s competitiveness. Here too though, numerous interactions need to be taken into account, enterprises thus need to be able to identify and weigh between different potentials for economically efficient optimizations. In order to be able to assess potentials, enterprises require a suitable method. This paper first briefly presents the need for this research before introducing the procedure that will be used to develop an appropriate method that not only considers interactions but is also quickly and easily implemented.
Critical behaviour of a 3D Ising-like system in the ρ^6 model approximation: Role of the correction for the potential averaging
Creators: name: Pylyuk, I. V.
name: Ulyak, M. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The critical behaviour of systems belonging to the three-dimensional Ising universality class is studied theoretically using the collective variables (CV) method. The partition function of a one-component spin system is calculated by the integration over the layers of the CV phase space in the approximation of the non-Gaussian sextic distribution of order-parameter fluctuations (the ρ^6 model). A specific feature of the proposed calculation consists in making allowance for the dependence of the Fourier transform of the interaction potential on the wave vector. The inclusion of the correction for the potential averaging leads to a nonzero critical exponent of the correlation function ηand the renormalization of the values of other critical exponents. The contributions from this correction to the recurrence relations for the ρ^6 model, fixed-point coordinates and elements of the renormalization-group linear transformation matrix are singled out. The expression for a small critical exponent ηis obtained in a higher non-Gaussian approximation.
description: 10 pages, 1 figure
Pressure metrics for deformation spaces of quasifuchsian groups with parabolics
Creators: name: Bray, Harrison
name: Canary, Richard
name: Kao, Lien-Yung
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this paper, we produce a mapping class group invariant pressure metric on the space QF(S) of quasiconformal deformations of a co-finite area Fuchsian group uniformizing a surface S. Our pressure metric arises from an analytic pressure form on QF(S) which is degenerate only on pure bending vectors on the Fuchsian locus. Our techniques also show that the Hausdorff dimension of the limit set varies analytically over QF(S).
Entropic control of particle sizes during viral self-assembly
Creators: name: Castelnovo, Martin
name: Muriaux, Delphine
name: Faivre-Moskalenko, Cendrine
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biomolecules (q-bio.BM)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Morphologic diversity is observed across all families of viruses. Yet these supra-molecular assemblies are produced most of the time in a spontaneous way through complex molecular self-assembly scenarios. The modeling of these phenomena remains a challenging problem within the emerging field of Physical Virology. We present in this work a theoretical analysis aiming at highlighting the particular role of configuration entropy in the control of viral particle size distribution. Specializing this model to retroviruses like HIV-1, we predict a new mechanism of entropic control of both RNA uptake into the viral particle, and of the particle's size distribution. Evidence of this peculiar behavior has been recently reported experimentally.
Minimum Resistance Anisotropy of Epitaxial Graphene on SiC
Creators: name: Momeni Pakdehi, D.
name: Aprojanz, J.
name: Sinterhauf, A.
name: Pierz, K.
name: Kruskopf, M.
name: Willke, P.
name: Baringhaus, Jens
name: Stöckmann, J.P.
name: Traeger, G.A.
name: Hohls, Frank
name: Tegenkamp, Christoph
name: Wenderoth, M.
name: Ahlers, Franz-J.
name: Schumacher, H.W.
Publisher: name: Washington D.C. : American Chemical Society
Year: 2018
Subjects: subject: bilayer-free graphene
subject: isotropic conductance
subject: resistance anisotropy
subject: scanning tunneling potentiometry
subject: SiC epitaxial graphene
subject: SiC terrace steps
subject: uniform growth
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: We report on electronic transport measurements in rotational square probe configuration in combination with scanning tunneling potentiometry of epitaxial graphene monolayers which were fabricated by polymer-assisted sublimation growth on SiC substrates. The absence of bilayer graphene on the ultralow step edges of below 0.75 nm scrutinized by atomic force microscopy and scanning tunneling microscopy result in a not yet observed resistance isotropy of graphene on 4H- and 6H-SiC(0001) substrates as low as 2%. We combine microscopic electronic properties with nanoscale transport experiments and thereby disentangle the underlying microscopic scattering mechanism to explain the remaining resistance anisotropy. Eventually, this can be entirely attributed to the resistance and the number of substrate steps which induce local scattering. Thereby, our data represent the ultimate limit for resistance isotropy of epitaxial graphene on SiC for the given miscut of the substrate.
title: Endangered Species Act Section 7(a)(2) Revised Biological Opinion for the Old Creek Bridge Replacement Project at SR-1 in San Luis Obispo County (EA 05-0L722)
titleType: Other
Creators: name: United States. National Marine Fisheries Service
Publisher: name: United States. National Marine Fisheries Service
Year: 2019

description: ESA Section 7 Consultation ; WCRO-2019-01914
Magnesium bioavailability from mineral waters with different mineralization levels in comparison to bread and a supplement
Creators: name: Schneider, Inga
name: Greupner, Theresa
name: Hahn, Andreas
Publisher: name: London : Taylor & Francis
Year: 2017
Subjects: subject: Mineral water
subject: magnesium
subject: bioavailability
subject: mineralization
subject: general nutrition
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: The aim of the present study was to compare the magnesium bioavailability from four mineral waters with different types of mineralization (e.g. SO 42- , HCO 3− , calcium) with the magnesium bioavailability from bread and from a magnesium supplement. A single-center, randomized, controlled trial with a crossover design with 22 healthy men and women was conducted at the Institute of Food Science and Human Nutrition, Leibniz University Hannover, Germany. The participants consumed the six test products providing 100 mg of magnesium each on six examination days with a one-week washout phase in between. The primary outcome variables were the 24 h urinary magnesium excretion, the 24 h urinary magnesium/creatinine ratio, and the area under the curve of serum magnesium levels for 10 h (AUC 0-10h ). No significant differences among groups were observed for either 24 h urinary magnesium excretion or 24 h urinary magnesium/creatinine ratio. Likewise, statistical group comparisons of AUC 0-10h for serum magnesium levels revealed no significant differences among the treatment groups. Accordingly, given equivalent magnesium availability from all test products, neither SO 42- content nor the content of HCO 3− or of calcium influenced the bioavailability of magnesium. Thus, mineral water with higher concentrations of magnesium constitutes a calorie-free magnesium source that contributes to optimal magnesium supply.
title: Endangered Species Act Section 7(a)(2) Programmatic Biological Opinion and Magnuson-Stevens Fishery Conservation and Management Act Essential Fish Habitat Response for Integrated Invasive Plant Management for the Northwest Oregon District, Bureau of Land Management
titleType: Other
Creators: name: United States. National Marine Fisheries Service
Publisher: name: United States. National Marine Fisheries Service
Year: 2019

description: ESA Section 7 Consultation ; WCRO-2019-00059
Quantum mechanical study of a generic quadratically coupled optomechanical system
Creators: name: Shi, H.
name: Bhattacharya, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Typical optomechanical systems involving optical cavities and mechanical oscillators rely on a coupling that varies linearly with the oscillator displacement. However, recently a coupling varying instead as the square of the mechanical displacement has been realized, presenting new possibilities for non-demolition measurements and mechanical squeezing. In this article we present a quantum mechanical study of a generic quadratic-coupling optomechanical Hamiltonian. First, neglecting dissipation, we provide analytical results for the dressed states, spectrum, phonon statistics and entanglement. Subsequently, accounting for dissipation, we supply a numerical treatment using a master equation approach. We expect our results to be of use to optomechanical spectroscopy, state transfer, wavefunction engineering, and entanglement generation.
description: 9 pages, 8 figures
Low Temperature Synthesis of Zeolites of the Faujasite Family (FAU-EMT) Using Industrial Mineral Waste (FR) from Silane Production
Creators: name: Petrov, Valeriy
name: Buhl, Josef-Christian
Publisher: name: Wuhan : Scientific Research Publishing
Year: 2017
Subjects: subject: FAU-EMT Zeolites
subject: Disordered Intergrowths
subject: Industrial Waste
subject: 25°C Synthesis
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Zeolite formation was investigated under low temperature conditions between 40°C - 25°C under insertion of a Si-rich filtration residue (FR) from waste water cleaning of the silane production. Syntheses were performed under open system conditions without stirring. The application of templates was excluded but gel formation was optimized by addition of citric acid. Beside a minimal consumption of process energy during synthesis under very low temperatures even FR was inserted without an expansive pre-treatment like calcination. Disordered intergrowths of FAU-EMT intermediates were obtained in each case, even at a temperature of only 25°C. The reaction products always occurred in two sequences, one at the bottom and another at the top of the reaction bin. A better crystallinity was detected for the latter products and the Si/Al ratio of these FAU-EMT members was close to 1.0 like in zeolite LSX. In contrast chemical analyses revealed an enrichment of Ca- and Mg- impurities from FR in the bottom products.
Simplicial model structures on pro-categories
Creators: name: Blom, Thomas
name: Moerdijk, Ieke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55U35, 18G55

description: We describe a method for constructing simplicial model structures on ind- and pro-categories. Our method is particularly useful for constructing "profinite" analogues of known model categories. Our construction quickly recovers Morel's model structure for pro-p spaces and Quick's model structure for profinite spaces, but we will show that it can also be applied to construct many interesting new model structures. In addition, we study some general properties of our method, such as its functorial behaviour and its relation to Bousfield localization. We compare our construction to the infinity-categorical approach to ind- and pro-categories in an appendix.
description: 44 pages; v2: improved exposition
title: Endangered Species Act Section 7 Formal Consultation and Magnuson-Stevens Fishery Conservation and Management Act Essential Fish Habitat Consultation for the BNSF North Fender Replacement Project at Railway Bridge 0050-37.0, Everett, Washington, COE Number: NWS-2019-65
titleType: Other
Creators: name: United States. National Marine Fisheries Service
Publisher: name: United States. National Marine Fisheries Service
Year: 2019

description: ESA Section 7 Consultation ; WCRO-2019-01086
Primitive divisors of sequences associated to elliptic curves with complex multiplication
Creators: name: Verzobio, Matteo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G05

description: Let $P$ and $Q$ be two points on an elliptic curve defined over a number field $K$. For $α\in \text{End}(E)$, define $B_α$ to be the $\mathcal{O}_K$-integral ideal generated by the denominator of $x(α(P)+Q)$. Let $\mathcal{O}$ be a subring of $\text{End}(E)$, that is a Dedekind domain. We will study the sequence $\{B_α\}_{α\in \mathcal{O}}$. We will show that, for all but finitely many $α\in \mathcal{O}$, the ideal $B_α$ has a primitive divisor when $P$ is a non-torsion point and there exist two endomorphisms $g\neq 0$ and $f$ so that $f(P)=g(Q)$. This is a generalization of previous results on elliptic divisibility sequences.
description: Minor changes. Final version of the paper. Published in Research in Number Theory
Towards an Ethical Framework in the Complex Digital Era
Creators: name: Pastor-Escuredo, David
name: Vinuesa, Ricardo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Artificial Intelligence (cs.AI)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: The digital revolution has brought ethical crossroads of technology, behavior and truth. However, the need of a comprehensive and constructive ethical framework is emerging as digital platforms have been used to build a global chaotic and truth-agnostic system. The unequal structure of the global system leads to dynamic changes and systemic problems, which have a more significant impact on those that are most vulnerable. Ethical frameworks based only on the individual level are no longer sufficient as they lack the necessary articulation to provide solutions to the new challenges. A new ethical vision must comprise the understanding of the scales and complex interconnections, as well as the causal chains of modern social systems. Many of these systems are internally fragile and very sensitive to external factors and threats, which lead to unethical situations that require systemic solutions still centered on individuals. Furthermore, the multi-layered net-like social tissue generates clusters of power that prevent certain communities from proper development. Digital technology has also impacted at the individual level posing the risk of a more homogeneous, predictable and ultimately controllable humankind. To preserve the core of humanity and the aspiration of common truth, a new ethical framework must empower individuals and uniqueness, as well as cultural heterogeneity, tackling the negative outcomes of digitalization. Only combining human-centered and collectiveness-oriented digital development will it be possible to construct new social models and interactions that are ethical. This vision requires science to enhance ethical frameworks and principles using computational tools to support truth-grounded actions, so as to transform and configure properties of the social systems.
description: arXiv admin note: text overlap with arXiv:2003.06530
Continuous-time state-space modelling of the hot hand in basketball
Creators: name: Mews, Sina
name: Ötting, Marius
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: We investigate the hot hand phenomenon using data on 110,513 free throws taken in the National Basketball Association (NBA). As free throws occur at unevenly spaced time points within a game, we consider a state-space model formulated in continuous time to investigate serial dependence in players' success probabilities. In particular, the underlying state process can be interpreted as a player's (latent) varying form and is modelled using the Ornstein-Uhlenbeck process. Our results support the existence of the hot hand, but the magnitude of the estimated effect is rather small.
Flawed groups and the topology of character varieties
Creators: name: Florentino, Carlos
name: Lawton, Sean
Publisher: name: arXiv
Year: 2020
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Geometry (math.AG)
subject: Geometric Topology (math.GT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: Primary 20F38, 14R20, 14P25, Secondary 20F19, 20F36

description: A finitely presented group F is called flawed if Hom(F,G)//G deformation retracts onto its subspace Hom(F,K)/K for reductive affine algebraic groups G and maximal compact subgroups K in G. After discussing generalities concerning flawed groups, we show that all finitely generated groups isomorphic to a free product of nilpotent groups are flawed. This unifies and generalizes all previously known classes of flawed groups. We also provide further evidence for the authors' conjecture that RAAGs (with torsion) are flawed. Lastly, we show direct products between finite groups and some flawed group are also flawed. These latter two theorems enlarge the known class of flawed groups.
description: 30 pages, 2 figures; Version 3 includes referees suggestions; accepted in Topology and its Applications
LUH-GRACE2018: A new time series of monthly gravity field solutions from GRACE
Creators: name: Koch, Igor
name: Naeimi, Majid
name: Flury, Jakob
name: Shabanloui, Akbar
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2018
Subjects: subject: LUH-GRACE2018
subject: GRACE
subject: Gravity field recovery
subject: Schwerefeldbestimmung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: In this contribution, we present a new time series of monthly gravity field solutions mainly obtained from GRACE K band range rate (KBRR) measurements. Our monthly solutions are computed using the in-house developed GRACE-SIGMA software. The processing is based on variational equations and consists of two main steps. In the first step, 3-hourly orbital arcs of the two satellites and the state transition and sensitivity matrices are dynamically integrated using a tailored Gauss-Jackson integrator. In this step, initial state vectors and 3D accelerometer bias parameters are adjusted using GRACE L1B reduced dynamic positions as main observations. In the second step, normal equations are accumulated and the normalized spherical harmonic coefficients up to degree and order 80 are estimated along with empirical and previously mentioned parameters from step 1. Here we use KBRR measurements as main observations and introduce reduced dynamic positions to solve for the low frequency coefficients. In terms of degree standard deviations, our gravity field solutions agree well with solutions of CSR, GFZ and JPL. In this contribution, processing details and derived mass variations are presented. The new time series, entitled as LUH-GRACE2018, can be downloaded from IfE or ICGEM websites.
On High-Contrast Characterization of Nearby, Short-Period Exoplanets with Giant Segmented-Mirror Telescopes
Creators: name: Crossfield, Ian J. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Measurements of the frequency with which short-period planets occur around main sequence stars allows a direct prediction of the number and types of such planets that will be amenable to characterization by high-contrast instruments on future giant segmented- mirror telescopes (GSMTs). Adopting conservative assumptions, I predict of order 10 planets with radii R_P=1-8 R_Earth and equilibrium temperatures <400 K should be accessible around stars within 8 pc of the Sun. These numbers are roughly the same for both near-infrared observations of scattered starlight and mid-infrared observations of planetary thermal emission, with the latter observations demonstrating greater relative sensitivity to smaller and cooler planets. Adopting the conservative assumption that planets with R_P=1-2 R_E and 2-4 R_E occur with equal frequency, I predict a 40% chance that a planet with R_P=1-2 R_E and equilibrium temperature 200-250 K will accessible to high-contrast thermal infrared characterization; this would be a compelling object for further study. To validate these predictions, more detailed analyses are needed of the occurrence frequencies of low-mass planets around M dwarfs, both in the Kepler field and in the solar neighborhood. Several planets already discovered by radial velocity surveys will be accessible to near-infrared high-contrast GSMT observations, including the low-mass planets alpha Cen Bb and (depending on their albedos) GJ 139c and d, GJ 876b and c, and tau Cet b, c, and d; tau Cet f would be amenable to thermal infrared characterization. Further efforts to model the near-infrared reflectance and mid-infrared emission of these and other short-period planets are clearly warranted, and will pave the way for the interpretation of future high-contrast characterization of a variety of planets around the nearest stars.
description: A&A Accepted. 10 pages, 5 figures, 1 table
Hydrodynamic states of phonons in insulators
Creators: name: Sokolovsky, S. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Chapman-Enskog method is generalized for accounting the effect of kinetic modes on hydrodynamic evolution. Hydrodynamic states of phonon system of insulators have been studied in a small drift velocity approximation. For simplicity, the investigation was carried out for crystals of the cubic class symmetry. It has been found that in phonon hydrodynamics, local equilibrium is violated even in the approximation linear in velocity. This is due to the absence of phonon momentum conservation law that leads to a drift velocity relaxation. Phonon hydrodynamic equations which take dissipative processes into account have been obtained. The results were compared with the standard theory based on the local equilibrium validity. Integral equations have been obtained for calculating the objects of the theory (including viscosity and heat conductivity). It has been shown that in low temperature limit, these equations are solvable by iterations. Steady states of the system have been considered and an expression for steady state heat conductivity has been obtained. It coincides with the famous result by Akhiezer in the leading low temperature approximation. It has been established that temperature distribution in the steady state of insulator satisfies a condition of heat source absence.
description: 10 pages
The Bessel kernel determinant on large intervals and Birkhoff's ergodic theorem
Creators: name: Blackstone, Elliot
name: Charlier, Christophe
name: Lenells, Jonatan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 41A60, 60B20, 60G55, 30E25

description: The Bessel process models the local eigenvalue statistics near $0$ of certain large positive definite matrices. In this work, we consider the probability \begin{align*} \mathbb{P}\Big( \mbox{there are no points in the Bessel process on } (0,x_{1})\cup(x_{2},x_{3})\cup\cdots\cup(x_{2g},x_{2g+1}) \Big), \end{align*} where $0
description: 33 pages
Membranes based on metal-organic frameworks (MOFs) or zeolites and new membrane concepts for hydrogen purification
Creators: name: Friebe, Sebastian
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Metal-organic framework membrane
subject: zeolite membrane
subject: mixed-matrix-membrane
subject: hydrogen purification
subject: pre- and post-synthetic modifications
subject: PEM fuel cell
subject: MOF-Membran
subject: Zeolith-Membran
subject: Mixed-Matrix-Membran
subject: Wasserstoffabtrennung
subject: Funktionalisierung
subject: PEM-Brennstoffzelle
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Controlling the False Discovery Rate in Transformational Sparsity: Split Knockoffs
Creators: name: Cao, Yang
name: Sun, Xinwei
name: Yao, Yuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Controlling the False Discovery Rate (FDR) in a variable selection procedure is critical for reproducible discoveries, and it has been extensively studied in sparse linear models. However, it remains largely open in scenarios where the sparsity constraint is not directly imposed on the parameters but on a linear transformation of the parameters to be estimated. Examples of such scenarios include total variations, wavelet transforms, fused LASSO, and trend filtering. In this paper, we propose a data-adaptive FDR control method, called the Split Knockoff method, for this transformational sparsity setting. The proposed method exploits both variable and data splitting. The linear transformation constraint is relaxed to its Euclidean proximity in a lifted parameter space, which yields an orthogonal design that enables the orthogonal Split Knockoff construction. To overcome the challenge that exchangeability fails due to the heterogeneous noise brought by the transformation, new inverse supermartingale structures are developed via data splitting for provable FDR control without sacrificing power. Simulation experiments demonstrate that the proposed methodology achieves the desired FDR and power. We also provide an application to Alzheimer's Disease study, where atrophy brain regions and their abnormal connections can be discovered based on a structural Magnetic Resonance Imaging dataset (ADNI).
Higher-order superintegrability of separable potentials with a new approach to the Post-Winternitz system
Creators: name: Rañada, Manuel F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 37J35, 70H06

description: The higher-order superintegrability of separable potentials is studied. It is proved that these potentials possess (in addition to the two quadratic integrals) a third integral of higher-order in the momenta that can be obtained as the product of powers of two particular rather simple complex functions. Some systems related with the harmonic oscillator, as the generalized SW system and the TTW system, were studied in previous papers; now a similar analysis is presented for superintegrable systems related with the Kepler problem. In this way, a new proof of the superintegrability of the Post-Winternitz system is presented and the explicit expression of the integral is obtained. Finally, the relations between the superintegrable systems with quadratic constants of the motion (separable in several different coordinate systems) and the superintegrable systems with higher-order constants of the motion are analyzed.
Interactions-disorder duality and critical phenomena in nodal semimetals, dilute gases and other systems
Creators: name: Sun, Shijun
name: Syzranov, Sergey
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate classes of interacting systems that allow for a mapping to disordered noninteracting systems. As we show, such a mapping is possible for interacting systems with a suppressed density of states at the chemical potential, leading to suppressed screening, and systems near BCS-type instabilities. The mapping can also be applied qualitatively to other classes of systems that are not exactly dual to each other. The established duality suggests a new approach to analytical and numerical studies of many-body and disorder-driven phenomena in a variety of systems and allows to predict, e.g., new phase transitions dual to the previously known ones. Using the established duality, we predict new disorder-driven transitions in nodal-line semimetals and systems with long-range hopping dual to, respectively, the BCS and BEC-vacuum transitions in interacting systems and new interaction-driven transitions dual to previously known non-Anderson disorder-driven transitions. The established principle can also be used to classify and describe phase transitions in dissipative systems described by non-Hermitian Hamiltonians.
description: 14 pages, 8 figures
Partial Correlation Graphical LASSO
Creators: name: Carter, Jack Storror
name: Rossell, David
name: Smith, Jim Q.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Standard likelihood penalties to learn Gaussian graphical models are based on regularising the off-diagonal entries of the precision matrix. Such methods, and their Bayesian counterparts, are not invariant to scalar multiplication of the variables, unless one standardises the observed data to unit sample variances. We show that such standardisation can have a strong effect on inference and introduce a new family of penalties based on partial correlations. We show that the latter, as well as the maximum likelihood, $L_0$ and logarithmic penalties are scale invariant. We illustrate the use of one such penalty, the partial correlation graphical LASSO, which sets an $L_{1}$ penalty on partial correlations. The associated optimization problem is no longer convex, but is conditionally convex. We show via simulated examples and in two real datasets that, besides being scale invariant, there can be important gains in terms of inference.
description: 41 pages, 7 figures
A Search for Rapidly Spinning Pulsars and Fast Transients in Unidentified Radio Sources with the NRAO 43-Meter Telescope
Creators: name: Schmidt, Deborah
name: Crawford, Fronefield
name: Langston, Glen
name: Gilpin, Claire
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have searched 75 unidentified radio sources selected from the NRAO VLA Sky Survey (NVSS) catalog for the presence of rapidly spinning pulsars and short, dispersed radio bursts. The sources are radio bright, have no identifications or optical source coincidences, are more than 5% linearly polarized, and are spatially unresolved in the catalog. If these sources are fast-spinning pulsars (e.g. sub-millisecond pulsars), previous large-scale pulsar surveys may have missed detection due to instrumental and computational limitations, eclipsing effects, or diffractive scintillation. The discovery of a sub-millisecond pulsar would significantly constrain the neutron star equation of state and would have implications for models predicting a rapid slowdown of highly recycled X-ray pulsars to millisecond periods from, e.g., accretion disk decoupling. These same sources were previously searched unsuccessfully for pulsations at 610 MHz with the Lovell Telescope at Jodrell Bank. This new search was conducted at a different epoch with a new 800 MHz backend on the NRAO 43-meter Telescope at a center frequency of 1200 MHz. Our search was sensitive to sub-millisecond pulsars in highly accelerated binary systems and to short transient pulses. No periodic or transient signals were detected from any of the target sources. We conclude that diffractive scintillation, dispersive smearing, and binary acceleration are unlikely to have prevented detection of the large majority of the sources if they are pulsars, though we cannot rule out eclipsing, nulling or intermittent emission, or radio interference as possible factors for some non-detections. Other (speculative) possibilities for what these sources might be include radio-emitting magnetic cataclysmic variables or older pulsars with aligned magnetic and spin axes.
description: 9 pages, including 3 figures and 2 tables. Accepted to the Astronomical Journal
Matrix model formulation of LS-covariant noncommutative quantum field theories on Minkowski spacetime
Creators: name: Fischer, André
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2011
Subjects: subject: Noncommutative quantum field theory
subject: matrix models
subject: Minkowski spacetime
subject: Nichtkommutative Quantenfeldtheorie
subject: Matrix Modelle
subject: Minkowski Raumzeit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
A GPU-accelerated Direct-sum Boundary Integral Poisson-Boltzmann Solver
Creators: name: Geng, Weihua
name: Jacob, Ferosh
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper, we present a GPU-accelerated direct-sum boundary integral method to solve the linear Poisson-Boltzmann (PB) equation. In our method, a well-posed boundary integral formulation is used to ensure the fast convergence of Krylov subspace based linear algebraic solver such as the GMRES. The molecular surfaces are discretized with flat triangles and centroid collocation. To speed up our method, we take advantage of the parallel nature of the boundary integral formulation and parallelize the schemes within CUDA shared memory architecture on GPU. The schemes use only $11N+6N_c$ size-of-double device memory for a biomolecule with $N$ triangular surface elements and $N_c$ partial charges. Numerical tests of these schemes show well-maintained accuracy and fast convergence. The GPU implementation using one GPU card (Nvidia Tesla M2070) achieves 120-150X speed-up to the implementation using one CPU (Intel L5640 2.27GHz). With our approach, solving PB equations on well-discretized molecular surfaces with up to 300,000 boundary elements will take less than about 10 minutes, hence our approach is particularly suitable for fast electrostatics computations on small to medium biomolecules.
Connective Models for Topological Modular Forms of Level $n$
Creators: name: Meier, Lennart
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55N34, 55P43, 55P91

description: The goal of this article is to construct and study connective versions of topological modular forms of higher level like $\mathrm{tmf}_1(n)$. In particular, we use them to realize Hirzebruch's level-$n$ genus as a map of ring spectra.
description: 27 pages; v2: added several clarifications and minor correcionts in response to referee's comments, final version to appear in AGT