cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A note on the $C$-numerical radius and the $λ$-Aluthge transform in finite factors
Creators: name: Zhou, Xiaoyan
name: Fang, Junsheng
name: Wen, Shilin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 47A12, 46L10

description: We prove that for any two elements $A$, $B$ in a factor $M$, if $B$ commutes with all the unitary conjugates of $A$, then either $A$ or $B$ is in $\mathbb{C}I$. Then we obtain an equivalent condition for the situation that the $C$-numerical radius $ω_{C}(\cdot)$ is a weakly unitarily invariant norm on finite factors and we also prove some inequalities on the $C$-numerical radius on finite factors. As an application, we show that for an invertible operator $T$ in a finite factor $M$, $f(\bigtriangleup_λ(T))$ is in the weak operator closure of the set $\{\sum_{i=1}^{n}z_{i}U_{i}f(T)U_{i}^{*}|n\in\mathbb{N},(U_{i})_{1\leq i\leq n}\in \mathscr{U}(M),\sum_{i=1}^{n}|z_{i}|\leq 1\}$, where $f$ is a polynomial, $\bigtriangleup_λ(T)$ is the $λ$-Aluthge transform of $T$ and $0\leqλ\leq 1$.
description: 11pages. arXiv admin note: text overlap with arXiv:math/0512197 by other authors
Extracting the top-quark running mass using $t\bar{t}$+1-jet events produced at the Large Hadron Collider
Creators: name: Fuster, J.
name: Irles, A.
name: Melini, D.
name: Uwer, P.
name: Vos, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the calculation of the next-to-leading order QCD corrections for top-quark pair production in association with an additional jet at hadron colliders, using the modified minimal subtraction scheme to renormalize the top-quark mass. The results are compared to measurements at the Large Hadron Collider run I. In particular, we determine the top-quark running mass from a fit of the theoretical results presented here to the LHC data.
title: Networking for more Geoscience in School Education – The Geoscience Education Field Officer Initiative
Creators: name: Hlawatsch, Sylke
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
In 2019, the European Geosciences Union (EGU) began a new initiative to appoint Geoscience Education Field Officers and train them to provide professional development to school teachers who have elements of geoscience in their teaching curriculum.

Today, officers are installed in 11 European countries and even more beyond Europe. Between the officers all type of educational expertise is represented, there are school teachers, university lecturers, geopark rangers as well as teacher trainers.

The officers are to liaise with a small group of EGU recognised supporters in their own country. In order to initiate this process in Germany, the initiative will be explained and potential modes of action dicussed.
Search strategies - Guidelines for clozapine treatment in resistant schizophrenia
Creators: name: Freire, Estefania
name: Espinoza, Jhon
name: González Pérez, Geomara Leticia
name: Hinojosa Calero, Michael Ariel
name: Ortiz, Diomaris
name: Ponce, Francis
name: SALAVARRIA FLORES, KARLA DANIELA
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 320221
subject: Psychiatry (incl. psychotherapy)

description: Clozapine is a molecule that acts as an antagonist in multiple neurotransmission systems, dopaminergic, adrenergic, cholinergic, histaminergic, and serotonergic, and whose use can only be suggested by a trained professional who, following a protocol, takes into account the following indications for the prescription: Clozapine can used in patients with Schizophrenia resistant to traditional antipsychotics; patients with Schizophrenia who do not tolerate adverse effects of other antipsychotics; patients with psychosis due to Parkinson's disease resistant to other drugs and in patients with Schizophrenia or schizoaffective disorder with recurrent suicidal behavior. Likewise, the guidelines for the use of Clozapine also establish the following measures: Before starting treatment with Clozapine, the patient and his family must be provided with adequate information, answer their questions and request consent for the use of the drug; it requires that the patient and his family be able to commit both to taking the medication regularly and to blood tests, being as the use of this medication can cause the following complications: severe neutropenia that can evolve into agranulocytosis, serious infections, myocarditis, weight gain, Clozapine-induced insulin resistance, and epilepsy.
Thickness dependence of the resistivity of Platinum group metal thin films
Creators: name: Dutta, Shibesh
name: Sankaran, Kiroubanand
name: Moors, Kristof
name: Pourtois, Geoffrey
name: Van Elshocht, Sven
name: Bommels, Jurgen
name: Vandervorst, Wilfried
name: Tokei, Zsolt
name: Adelmann, Christoph
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on the thin film resistivity of several platinum-group metals (Ru, Pd, Ir, Pt). Platinum-group thin films show comparable or lower resistivities than Cu for film thicknesses below about 5\,nm due to a weaker thickness dependence of the resistivity. Based on experimentally determined mean linear distances between grain boundaries as well as ab initio calculations of the electron mean free path, the data for Ru, Ir, and Cu were modeled within the semiclassical Mayadas--Shatzkes model [Phys. Rev. B 1, 1382 (1970)] to assess the combined contributions of surface and grain boundary scattering to the resistivity. For Ru, the modeling results indicated that surface scattering was strongly dependent on the surrounding material with nearly specular scattering at interfaces with SiO2 or air but with diffuse scattering at interfaces with TaN. The dependence of the thin film resistivity on the mean free path is also discussed within the Mayadas--Shatzkes model in consideration of the experimental findings.
description: 28 pages, 9 figures
Sharp measure contraction property for generalized H-type Carnot groups
Creators: name: Barilari, Davide
name: Rizzi, Luca
Publisher: name: arXiv
Year: 2017
Subjects: subject: Metric Geometry (math.MG)
subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 53C17, 53C22, 35R03, 54E35, 53C21

description: We prove that H-type Carnot groups of rank $k$ and dimension $n$ satisfy the $\mathrm{MCP}(K,N)$ if and only if $K\leq 0$ and $N \geq k+3(n-k)$. The latter integer coincides with the geodesic dimension of the Carnot group. The same result holds true for the larger class of generalized H-type Carnot groups introduced in this paper, and for which we compute explicitly the optimal synthesis. This constitutes the largest class of Carnot groups for which the curvature exponent coincides with the geodesic dimension. We stress that generalized H-type Carnot groups have step 2, include all corank 1 groups and, in general, admit abnormal minimizing curves. As a corollary, we prove the absolute continuity of the Wasserstein geodesics for the quadratic cost on all generalized H-type Carnot groups.
description: 18 pages. This article extends the results of arXiv:1510.05960. v2: revised and improved version. v3: final version, to appear in Commun. Contemp. Math
title: 'Where to land the next Mars rover?' and 'How much drugs are in our soils?' - a computational study of natural sorptive materials
Creators: name: Erastova, Valentina
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
'Where to land the next Mars rover?' and 'How much drugs are in our soils?' - to answer these questions, we must look at the fundamental processes at the mineral and material interface.

In this talk, I will discuss our approach to the development of molecular models of two important sorptive materials - black carbons and smectite clays - and show how the use of atomistic simulations provides us with information about the physicochemical processes at their interface.

Our goal is to facilitate the uptake of molecular modelling to assist in the development of environmental pollution remediation materials, understanding seasonal fluctuations of the pollutants in water bodies, constructing mineral-assisted origin of life hypotheses, and guiding our search for biosignatures in Space.
Symmetric 3 Qubit State Invariants
Creators: name: Meill, Alexander
name: Meyer, David A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For pure symmetric 3-qubit states there are only three algebraically independent entanglement measures; one choice is the pairwise concurrence $\mathcal C$, the 3-tangle $τ$, and the Kempe invariant $κ$. Using a canonical form for symmetric $N$-qubit states derived from their Majorana representation, we derive the explicit achievable region of triples $(\mathcal C,τ,κ)$.
description: 5 pages, 2 figures
Functional renormalization group study of parallel double quantum dots: Effects of asymmetric dot-lead couplings
Creators: name: Protsenko, V. S.
name: Katanin, A. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We explore the effects of asymmetry of hopping parameters between double parallel quantum dots and the leads on the conductance and a possibility of local magnetic moment formation in this system using functional renormalization group approach with the counterterm. We demonstrate a possibility of a quantum phase transition to a local moment regime (so called singular Fermi liquid (SFL) state) for various types of hopping asymmetries and discuss respective gate voltage dependences of the conductance. It is shown, that depending on the type of the asymmetry, the system can demonstrate either a first order quantum phase transition to SFL state, accompanied by a discontinuous change of the conductance, similarly to the symmetric case, or the second order quantum phase transition, in which the conductance is continuous and exhibits Fano-type asymmetric resonance near the transition point. A semi-analytical explanation of these different types of conductance behavior is presented.
description: 11 pages, 9 figures
title: The Alkaline Complex of Iivaara (Finland): Shallow Intrusive Setting and Fluid Separation
Creators: name: Hakim, Fahmi
name: Achoki, Dennis Obwocha
name: Fusswinkel, Tobias
name: Sindern, Sven
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
This study presents the petrogenesis of intrusive rocks of the Iivaara alkaline complex (Finland) and associated enrichment of elements, which are mostly carried by titanite and apatite. Comprehensive mineralogical and textural observations were made and mineral chemical analyses were performed on apatite, titanite, clinopyroxene, and feldspathoid group minerals using EPMA and LA-ICP-MS.

Intrusive rocks exposed in the Iivaara alkaline complex are mainly composed of ijolite group rocks, nepheline syenite, and pyroxenites. They generally show low mineralogical variability but large textural variety. Several textures indicate magmatic formation conditions, including special textures of mingling, schlieren, and Unidirectional Solidification Texture (UST). Some others show fluid-derived formation conditions like replacement texture of primary minerals, breccia as well as veins.

The marked textural heterogeneity present at the margin of the magmatic intrusion and the innermost zone of the fenite aureole, reveals that the current erosion level of the Iivaara exposes the roof zone of an alkaline silicate intrusion. It is characterized by fast cooling, steep temperature gradients, association of small magma batches crystallizing at different conditions, and by expulsion of fluids.

The high abundance of secondary feldspathoid group minerals, apatite, and titanite attests to the significant enrichment of halogens (F, Cl), CO2, SO4, P, and Ti in these rocks crystallized from melts or fluids, which in part have agpaitic character.

Mineral chemical data reflect two main stages of fluid expulsion, a syn-magmatic Ca-dominated fluid causing marked fenitization of the wall rocks and a syn- to post- magmatic fluid forming feldspathoid minerals.
Scopaeus Erichson, Revised Definition
Creators: name: Herman, Lee
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Scopaeus

description: Scopaeus Erichson, Revised Definition Figures 1–8, 14, 15, 23–239
description: Published as part of Herman, Lee, 2023, Generic Revisions Of The Scopaeina And The Sphaeronina (Coleoptera: Staphylinidae: Paederinae: Lathrobiini), pp. 1-195 in Bulletin of the American Museum of Natural History 2023 (460) on page 61, DOI: 10.1206/0003-0090.460.1.1, http://zenodo.org/record/8110297
A New Twist on the Geometry of Gravitational Plane Waves
Creators: name: Shore, Graham M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The geometry of twisted null geodesic congruences in gravitational plane wave spacetimes is explored, with special focus on homogeneous plane waves. The role of twist in the relation of the Rosen coordinates adapted to a null congruence with the fundamental Brinkmann coordinates is explained and a generalised form of the Rosen metric describing a gravitational plane wave is derived. The Killing vectors and isometry algebra of homogeneous plane waves (HPWs) are described in both Brinkmann and twisted Rosen form and used to demonstrate the coset space structure of HPWs. The van Vleck-Morette determinant for twisted congruences is evaluated in both Brinkmann and Rosen descriptions. The twisted null congruences of the Ozsvath-Schucking,`anti-Mach' plane wave are investigated in detail. These developments provide the necessary geometric toolkit for future investigations of the role of twist in loop effects in quantum field theory in curved spacetime, where gravitational plane waves arise generically as Penrose limits; in string theory, where they are important as string backgrounds; and potentially in the detection of gravitational waves in astronomy.
description: 60 pages, 2 figures. Extended version with new material on Rosen geodesics and isometries. Title changed
Semi-hyperbolic rational maps and size of Fatou components
Creators: name: Ntalampekos, Dimitrios
Publisher: name: arXiv
Year: 2017
Subjects: subject: Dynamical Systems (math.DS)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 37F10

description: Recently Merenkov and Sabitova introduced the notion of a homogeneous planar set. Using this notion they proved a result for Sierpi${ń}$ski carpet Julia sets of hyperbolic rational maps that relates the diameters of the peripheral circles to the Hausdorff dimension of the Julia set. We extend this theorem to Julia sets (not necessarily Sierpi${ń}$ski carpets) of semi-hyperbolic rational maps, and prove a stronger version of the theorem that was conjectured by Merenkov and Sabitova.
description: 23 pages, 4 figures
Time-dependent N-electron valence perturbation theory with matrix product state reference wavefunctions for large active spaces and basis sets: Applications to the chromium dimer and all-trans polyenes
Creators: name: Sokolov, Alexander
name: Guo, Sheng
name: Ronca, Enrico
name: Chan, Garnet Kin-Lic
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: In earlier work [J. Chem. Phys. 144, 064102 (2016)], we introduced a time-dependent formulation of the second-order N-electron valence perturbation theory (t-NEVPT2) which (i) had a lower computational scaling than the usual internally-contracted perturbation formulation, and (ii) yielded the fully uncontracted NEVPT2 energy. Here, we present a combination of t-NEVPT2 with a matrix product state (MPS) reference wavefunction (t-MPS-NEVPT2) that allows to compute uncontracted dynamic correlation energies for large active spaces and basis sets, using the time-dependent density matrix renormalization group (td-DMRG) algorithm. In addition, we report a low-scaling MPS-based implementation of strongly-contracted NEVPT2 (sc-MPS-NEVPT2) that avoids computation of the four-particle reduced density matrix. We use these new methods to compute the dissociation energy of the chromium dimer and to study the low-lying excited states in all-trans polyenes (C$_4$H$_6$ to C$_{24}$H$_{26}$), incorporating dynamic correlation for reference wavefunctions with up to 24 active electrons and orbitals.
title: The provenance of the sandstone used for the construction of temples in the World Heritage Site of Angkor, Cambodia
Creators: name: Lehrberger, Gerhard
name: Leisen, Hans
name: von Plehwe-Leisen, Esther
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Many of the Angkor temples with their magnificent decoration are built of sandstone. A greyish-green variety of arkose with an argillitic-chloritic binding was used typically, including the famous temple Angkor Wat.

The provenance of the “temple sandstone” can be located at the Eastern slope of the Kulen mountain as part of the Upper Triassic and Lower Jurassic Terrain Rouge formation. The properties of the building stones vary widely and this results in various forms of damage and decay. Therefore, knowledge of the deposits and the quarries is essential.

Using digital terrane models with data acquired in 2015 by the Cambodian Archaeological Lidar Initiative (CALI) the fieldwork was executed. Wide areas with flat pit-quarries were found in the densely forested area, some were known since the 1960s. Sedimentary structures and the tectonic fracture pattern could be detected in the digital terrane model.

Sandstone was quarried in many sites obviously at the same time in different stratigraphic levels due to the high demand during the construction of big temples within a relatively short time. Thus, different sandstone varieties occur in a single temple.

The quarries are often flat pits and tool marks are frequently observed. Preformatted blocks are still found in and near the quarries.

A schematic cross-section of the sedimentary sequence of the eastern slope of the Kulen Mountains could be documented particularly along a newly built road. The so far proposed stratigraphy needs a major revision.
Dilaton Field Released under Collision of Dilatonic Black Holes with Gauss-Bonnet Term
Creators: name: Gwak, Bogeun
name: Ro, Daeho
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the upper limit of the gravitational radiation released upon the collision of two dilatonic black holes by analyzing the Gauss-Bonnet term. Dilatonic black holes have a dilaton hair coupled with this term. Using the laws of thermodynamics, the upper limit of the radiation is obtained, which reflected the effects of the dilaton hair. The amount of radiation released is greater than that emitted by a Schwarzschild black hole due to the contribution from the dilaton hair. In the collision, most of the dilaton hair can be released through radiation, where the energy radiated by the dilaton hair is maximized when the horizon of one black hole is minimized for a fixed second black hole.
description: 18 pages, 12 figures, published version in EPJC
Counting Arcs in Projective Planes via Glynn's Algorithm
Creators: name: Kaplan, Nathan
name: Kimport, Susie
name: Lawrence, Rachel
name: Peilen, Luke
name: Weinreich, Max
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 51E20, 51E15, 51A35

description: An $n$-arc in a projective plane is a collection of $n$ distinct points in the plane, no three of which lie on a line. Formulas counting the number of $n$-arcs in any finite projective plane of order $q$ are known for $n \le 8$. In 1995, Iampolskaia, Skorobogatov, and Sorokin counted $9$-arcs in the projective plane over a finite field of order $q$ and showed that this count is a quasipolynomial function of $q$. We present a formula for the number of $9$-arcs in any projective plane of order $q$, even those that are non-Desarguesian, deriving Iampolskaia, Skorobogatov, and Sorokin's formula as a special case. We obtain our formula from a new implementation of an algorithm due to Glynn; we give details of our implementation and discuss its consequences for larger arcs.
description: 19 pages, to appear in Journal of Geometry
Constraining f(T) gravity by dynamical system analysis
Creators: name: Mirza, Behrouz
name: Oboudiat, Fatemeh
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the cosmological solutions of the $f(T)$ gravity theory using the method of dynamical systems. For this purpose a general form of the $f(T)$ function is considered and four conditions are defined that they have to satisfy in order to describe the standard cosmological history. We examine the power law, and another form of $f(T)$ against these conditions. For a power law function $f(T)= B(-T)^β$, $β$ must be less than one and unequal to $\frac{1}{2}$ to obtain a consistent cosmological model. We also investigate a model of inflation in this theory.
description: 11 pages
Is the kinetic equation for turbulent gas-particle flows ill-posed?
Creators: name: Reeks, M. W.
name: Swailes, D. C.
name: Bragg, A. D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This paper is about well-posedness and realizability of the kinetic equation for gas-particle flows and its relationship to the Generalized Langevin Model (GLM) PDF equation. Previous analyses claim that this kinetic equation is ill-posed, that in particular it has the properties of a backward heat equation and as a consequence, its solutions will in the course of time exhibit finite-time singularities. We show that the analysis leading to this conclusion is fundamentally incorrect because it ignores the coupling between the phase space variables in the kinetic equation and the time and particle inertia dependence of the phase space diffusion tensor. This contributes an extra $+ve$ diffusion that always outweighs the contribution from the$-ve$ diffusion associated with the dispersion along one of the principal axes of the phase space diffusion tensor. This is confirmed by a numerical evaluation of analytic solutions of these $+ve$ and $-ve$ contributions to the particle diffusion coefficient along this principal axis. We also examine other erroneous claims and assumptions made in previous studies that demonstrate the apparent superiority of the GLM PDF approach over the kinetic approach. In so doing we have drawn attention to the limitations of the GLM approach which these studies have ignored or not properly considered, to give a more balanced appraisal of the benefits of both PDF approaches.
Brown And Red Dwarfs Identified in NIR Imaging
Creators: name: Holwerda, Benne Willem
Publisher: name: Zenodo
Year: 2023
Subjects: Surveys within the Milky Way and Nearby Galaxies

description: Low mass (sub)stellar objects are an interloper in the search for high-redshift galaxies and the lower end of the initial mass function of the Milky Way. Can these objects be identified in and typed with the extragalactic choice of filters? Initial work to identify brown dwarfs uses the Cosmic Evolution Early Release Science Survey (CEERS) NIRcam campaign. kNN nearest neighbor types these sources with the four filters (F115W, F150W, F200W, F277W). The training set is artificial photometry based on iSPEX spectra of nearby brown dwarfs. Brown dwarfs are subtyped in 30 subtypes (M0-M9, L0-L9 etc). The result of the kNN is a good classification within half a broad type but much more granular typing declines accuracy. This looks to be a viable way to identify brown dwarfs in NIRcam data for Milky Way science (scale of the Milky Way, total number of brown dwarfs in disk and halo, total number of brown dwarfs, and the galaxy-wide IMF). The Nancy Grace Roman Space Telescope is set to observe a large swath of the sky with optical/NIR bands. A similar photometric typing is possible (based on HST experience) with the promise of identifying the low-end of stellar mass function and how it is spread throughout the Milky Way for the first time.
Phase Diagram of the Shastry-Sutherland Kondo Lattice Model with Classical Localized Spins: A Variational Calculation Study
Creators: name: Shahzad, Munir
name: Sengupta, Pinaki
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the Kondo lattice Shastry-Sutherland model with additional Dzyaloshinskii-Moriya(DM) interactions, exploring the possible magnetic phases in its multi-dimensional parameter space. Treating the local moments as classical spins and using a variational ansatz, we identify the parameter ranges over which various common magnetic orderings are potentially stabilized. Our results reveal that the competing interactions result in a heightened susceptibility towards a wide range of spin configurations including longitudinal ferromagnetic and antiferromagnetic order, coplanar flux configurations and most interestingly, multiple non-coplanar configurations including a novel canted-Flux state as the different Hamiltonian parameters like electron density, interaction strengths and degree of frustration are varied.
description: 11 pages, 4 figures
title: Micropyrite in stromatolite : a time capsule of ancient metabolisms
Creators: name: Marin Carbonne, Johanna
name: Decraene, Marie Noelle
name: Dupeyron, Juliette
name: Alleon, Julien
name: Pasquier, Virgil
name: Olivier, Nicolas
name: Thomazo, Christophe
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The identification of ancient microbial signatures preserved in the geological record is crucial for understanding life evolution during the Early Earth. Stromatolites and microbialites are considered among undisputable oldest trace of life but their biogenicity is sometimes disputed. Archean stromatolite contain small sulfides hereafter designed as micropyrite, often enclosed with organic material, that can be formed either by abiotic processes (reaction between H2S and Fe(II)) or by metabolic activity like microbial sulfate reduction (MSR) or dissimilatory iron reduction (DIR). Iron and sulfur isotope compositions offer the most direct means to track the biogeochemical cycling of these elements through time, but their joint use as biosignatures of specific metabolic activity has been relatively limited to date. We have developed a microscale approach using correlative microscopy and SIMS and NanoSIMS analyses that allow to document Fe and S isotope composition at the mineralogical scale of the pyrite grains. Here we will present results obtained on the Tumbiana Formation (2.7 Ga, Western Australia), on the Buck Reef chert (3.41 Ga, basal member of the Kromberg Formation, South Africa), and on the Moodies Group (3.2 Ga, South Africa). Our approach allows to decipher the post-depositional metasomatic influence from the primary microbial signatures inherited during diagenesus. Our results also highlight that pyrite formation record very local conditions at the sediment-interface or at the microbial mats. Our results demonstrate the existence of microbial iron respiration as early as 3.26 Gyr ago, providing new time calibration of the tree of life for this type of metabolism.
Designing wave vector manipulation devices using a transformation optics approach
Creators: name: Giloan, Mircea
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A transformation optics approach was used to derive a general method for designing electromagnetic devices able to manipulate the wave vectors in the specific manner required by the functionality of the device. While the wave paths inside the device remain of a secondary importance the wave vectors are gradually changed in the desired way by choosing the appropriate coordinate transformation. The proposed method was applied to design both converging and diverging flat lenses. Computer simulations revealed the focusing ability of a converging flat lens designed using the proposed technique.
description: 16 pages, 5 figures
Tunable Metamaterials Fabricated by Fiber Drawing
Creators: name: Fleming, Simon
name: Stefani, Alessio
name: Tang, Xiaoli
name: Argyros, Alexander
name: Kemsley, Daniel
name: Cordi, James
name: Lwin, Richard
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate a practical scalable approach to the fabrication of tunable metamaterials. Designed for THz wavelengths, the metamaterial is comprised of polyurethane filled with an array of indium wires using the well-established fiber drawing technique. Modification of the dimensions of the metamaterial provides tunability: by compressing the metamaterial we demonstrated a 50% plasma frequency shift using THz time domain spectroscopy. Releasing the compression allowed the metamaterial to return to its original dimensions and plasma frequency, demonstrating dynamic reversible tunability.
Nucleon momentum distributions in $^3$He and three-body interactions
Creators: name: Bekh, S. V.
name: Kobushkin, A. P.
name: Strokovsky, E. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We calculate momentum distributions of neutrons and protons in $^3$He in the framework of a model which includes 3N interactions together with 2N interactions. It is shown that contribution of 3N interactions becomes essential in comparison with contribution coming from 2N interaction for internal momentum in $^3$He $k>$~250~MeV/c. We also compare calculated momentum distribution of protons with so-called empirical momentum distribution of protons extracted from A$(^3\mathrm{He},p)$ breakup cross-sections measured for protons emitted at zero degree. It is concluded that 3N interactions cannot completely explain the disagreement between the available data on the empirical momentum distribution of protons in $^3\mathrm{He}$ and calculations based on 2N interaction, which is observed at high momentum region of the momentum distribution, $k>$~250~MeV/c.
description: Published version. Updated introduction, figure 4 is changed, some typos are corrected
Sensor scheduling with time, energy and communication constraints
Creators: name: Rusu, Cristian
name: Thompson, John
name: Robertson, Neil M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper we present new algorithms and analysis for the linear inverse sensor placement and scheduling problems over multiple time instances with power and communications constraints. The proposed algorithms, which deal directly with minimizing the mean squared error (MSE), are based on the convex relaxation approach to address the binary optimization scheduling problems that are formulated in sensor network scenarios. We propose to balance the energy and communications demands of operating a network of sensors over time while we still guarantee a minimum level of estimation accuracy. We measure this accuracy by the MSE for which we provide average case and lower bounds analyses that hold in general, irrespective of the scheduling algorithm used. We show experimentally how the proposed algorithms perform against state-of-the-art methods previously described in the literature.
Electromagnetic Response during a Quench Dynamics to Superconducting State: Time-Dependent Ginzburg-Landau Analysis
Creators: name: Kennes, D. M.
name: Millis, A. J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We use a numerical solution of the deterministic TDGL equations to determine the response induced by a probe field in a material quenched into a superconducting state. We characterize differences in response according to whether the probe is applied before, during, or after the phase stiffness has built up to its final steady state value.
description: 10 pages 12 figures, version as published
Water sub-diffusion in membranes for fuel cells
Creators: name: Berrod, Quentin
name: Hanot, Samuel
name: Guillermo, Armel
name: Mossa, Stefano
name: Lyonnard, Sandrine
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate the dynamics of water confined in soft ionic nano-assemblies, an issue critical for a general understanding of the multi-scale structure-function interplay in advanced materials. We focus in particular on hydrated perfluoro-sulfonic acid compounds employed as electrolytes in fuel cells. These materials form phase-separated morphologies that show outstanding proton-conducting properties, directly related to the state and dynamics of the absorbed water. We have quantified water motion and ion transport by combining Quasi Elastic Neutron Scattering, Pulsed Field Gradient Nuclear Magnetic Resonance, and Molecular Dynamics computer simulation. Effective water and ion diffusion coefficients have been determined together with their variation upon hydration at the relevant atomic, nanoscopic and macroscopic scales, providing a complete picture of transport. We demonstrate that confinement at the nanoscale and direct interaction with the charged interfaces produce anomalous sub-diffusion, due to a heterogeneous space-dependent dynamics within the ionic nanochannels. This is irrespective of the details of the chemistry of the hydrophobic confining matrix, confirming the statistical significance of our conclusions. Our findings turn out to indicate interesting connections and possibilities of cross-fertilization with other domains, including biophysics. They also establish fruitful correspondences with advanced topics in statistical mechanics, resulting in new possibilities for the analysis of Neutron scattering data.
Visible lattice points and the Extended Lindelöf Hypothesis
Creators: name: Takeda, Wataru
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11P21, 11N45, 11R42, 52C07

description: We consider the number of visible lattice points under the assumption of the Extended Lindelöf Hypothesis. We get a relation between visible lattice points and the Extended Lindelöf Hypothesis. And we also get a relation between visible lattice points over $\mathbf{Q}(\sqrt{-1})$ and the Gauss Circle Problem.
description: 11 pages
title: Silicon and Carbon content in the Earth’s inner core constrained from sound velocities at extreme conditions
Creators: name: Müller, Susanne C.
name: Kolesnikov, Efim
name: Aprilis, Georgios
name: Chumakov, Alexandr
name: Comboni, Davide
name: Hanfland, Michael
name: Sergeev, Ilya
name: Libon, Lélia
name: Morgenroth, Wolfgang
name: Wilke, Max
name: Li, Xiang
name: Koppetz-Mitra, Hannah
name: Rohrbach, Arno
name: Berndt, Jasper
name: Sanchez-Valle, Carmen
name: Kupenko, Ilya
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The inner core is comprised of iron and nickel as the main components. However, the composition of the Earth’s core remains enigmatic to date. The comparison of densities and seismic velocities between pure Fe-Ni alloys and seismological models reveals a density deficit and reduced velocities in the core. These observations can be explained by the addition of 3-7 wt% light elements to Fe-Ni alloys. Possible candidates are H, C, O, Si, and S. To understand the formation, evolution, and dynamics of the core of the Earth and other terrestrial planets, constraining the light element budget is crucial. Silicon could be the dominant light element because of its partitioning behaviour, isotope fractionation, and chemical properties. The low shear velocity (Vs) and high Poisson ratio in the inner core could be explained by the addition of carbon. Indeed, recent ab initio calculations proposed that simultaneous incorporation of Si and C can provide a good match both for density and sound velocities.

In search of the light elements and their amounts, we carried out nuclear inelastic scattering (NIS) and x-ray diffraction experiments in diamond anvil cells at pressures up to 160 GPa. We determined the sound velocities of the Fe-2wt%Si-0.4wt%C-alloy at high pressures and used thermoelastic parameters extracted from the NIS data to extrapolate them to core conditions. Here, we will present the results and discuss the availability of silicon and carbon in the inner core, as well as the possible amount of each element to match seismic observations.
title: Extraction of Cr during mantle melting: Experimental constraints on the role of peridotite composition and the effect of water
Creators: name: Ruttmann, Myriam
name: Botcharnikov, Roman
name: Stroh, Annalena
name: Moulas, Evangelos
name: Buhre, Stephan
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Chromium (Cr) is considered to be one of the most economically important critical raw materials. The most economically significant mineral for Cr exploitation is Chromite which can be found in podiform Chromite deposits that are associated with ophiolite complexes from Supra-Subduction Zone (SSZ) settings. In Europe, such deposits are located in northwestern Greece and the Balkans in general. The precise nature of podiform chromitite generation is not fully understood and still under debates and could be the result of a complex sequence of enrichment processes.To improve our understanding of Cr extraction during mantle melting a series of experiments were performed on natural peridotite samples from the Pindos Ophiolite, Greece. Our experiments were conducted under pressure (1.0-1.5 GPa) and temperature (1350-1400°C) conditions that are relevant for the genesis of intra-oceanic arc magmas. To study the effect of hydrous conditions, the amount of water in the system was varied from 1 to 10 wt%. The samples had various modal proportions of olivine, ortho- and clinopyroxene and a different degree of alteration.All experiments produced Cr-enriched melts (up to 7000 µg/g Cr) with a positive dependence of Cr content on the degree of melting and on the concentration of water added to the system. Based on the obtained results we have developed forward numerical models to constrain the Cr-enrichment process in magmas during mantle melting. Our study demonstrates that previous estimates on the extraction efficiency of Cr during mantle melting in SSZ should be reconsidered.
Learning the distribution with largest mean: two bandit frameworks
Creators: name: Kaufmann, Emilie
name: Garivier, Aurélien
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (cs.LG)
subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Over the past few years, the multi-armed bandit model has become increasingly popular in the machine learning community, partly because of applications including online content optimization. This paper reviews two different sequential learning tasks that have been considered in the bandit literature ; they can be formulated as (sequentially) learning which distribution has the highest mean among a set of distributions, with some constraints on the learning process. For both of them (regret minimization and best arm identification) we present recent, asymptotically optimal algorithms. We compare the behaviors of the sampling rule of each algorithm as well as the complexity terms associated to each problem.
On Infinite Linear Programming and the Moment Approach to Deterministic Infinite Horizon Discounted Optimal Control Problems
Creators: name: Kamoutsi, Angeliki
name: Sutter, Tobias
name: Esfahani, Peyman Mohajerin
name: Lygeros, John
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 49L20, 49M20, 90C22, 90C48

description: We revisit the linear programming approach to deterministic, continuous time, infinite horizon discounted optimal control problems. In the first part, we relax the original problem to an infinite-dimensional linear program over a measure space and prove equivalence of the two formulations under mild assumptions, significantly weaker than those found in the literature until now. The proof is based on duality theory and mollification techniques for constructing approximate smooth subsolutions to the associated Hamilton-Jacobi-Bellman equation. In the second part, we assume polynomial data and use Lasserre's hierarchy of primal-dual moment-sum-of-squares semidefinite relaxations to approximate the value function and design an approximate optimal feedback controller. We conclude with an illustrative example.
description: 7 pages, 1 figure
Integral Field Spectroscopy of Balmer-Dominated Shocks in the Magellanic Cloud Supernova Remnant N103B
Creators: name: Ghavamian, Parviz
name: Seitenzahl, Ivo R.
name: Vogt, Frederic P. A.
name: Dopita, Michael A.
name: Terry, Jason B.
name: Williams, Brian J.
name: Winkler, P. Frank
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present results of integral field spectroscopy of Balmer-dominated shocks in the LMC supernova remnant (SNR) N103B, carried out using the Wide Field Integral Spectrograph (WiFeS) on the 2.3 m telescope at Siding Spring Observatory in Australia. Existing X-ray studies of N103B have indicated a Type Ia supernova origin. Radiative shock emission from clumpy material surrounding the SNR may result from interaction of the forward shock with relic stellar wind material, possibly implicating a thermonuclear explosion in a single-degenerate binary system. The recently discovered Balmer-dominated shocks mark the impact of the forward shock with low density, partially neutral CSM gas, and form a partial shell encircling clumps of material exhibiting radiative shocks. The WiFeS spectra of N103B cover the range 3500 - 7000 Angstroms and reveal broad Halpha profiles up to 2360 km/s in width along the northern rim, and both Halpha and Hbeta broad profiles approximately 1300 km/s in width along the southern rim. Our fits to the Halpha line profiles indicate that in addition to from the usual broad and narrow emission components, a third component of intermediate width exists in the Balmer-dominated shocks, ranging from around 125 km/s up to 225 km/s in width. Recent Balmer-dominated shock models have predicted such an intermediate-width component will be generated in a fast neutral precursor. We derive a Sedov age of approximately 685 years for N103B from the Balmer-dominated spectra, consistent with the young age of 380 - 860 years estimated from light echo studies.
description: 16 pages, 7 Figures, Accepted for publication by ApJ
title: The impact of fluid and mineral composition on experimental carbonate silicification
Creators: name: Rüdiger, Gina
name: Liesegang, Moritz
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The pseudomorphic replacement of carbonate minerals by silica is an omnipresent diagenetic process. However, the parameters that influence the silicification process are incompletely understood and experimental studies are sparse. Here, we present the results of batch experiments at normal conditions designed to replace various carbonates (calcite, aragonite, dolomite, magnesite, and marble) by amorphous silica. The experiments were conducted at variable pH (2–7), dissolved silica concentration (100–400 ppm), and duration ranging from 7 to 21 days. We used a multi-method analytical approach with XRPD, EPMA, Raman spectroscopy, and SEM to characterize the parent and product phases and the rich array of replacement features. After 21 days at pH 2–3, calcite and aragonite dissolve, disordered amorphous silica particles (<1 µm) precipitate, and an up to 150 µm thick replacement rim forms. During the initial calcite replacement phase, porous honeycomb-like structures form and relict rhombs remain. In a second phase, residual dissolved silica precipitates inside pore space at the replacement interface and forms dense networks of amorphous silica nanoparticles. Dense silica aggregates also form during the pseudomorphic replacement of fibrous aragonite. At the same experimental run conditions, neither dolomite nor magnesite show dissolution or precipitation features. Our results show that at low pH rim thickness increases with time and reaches its maximum at initial pH 2.5. At dissolved silica concentrations <200 ppm, no precipitation of amorphous silica was observed. The pseudomorphic carbonate-silica replacement proceeds via an interface-coupled dissolution-precipitation mechanism, in which carbonate dissolution induces silica precipitation.
Micranops Cameron
Creators: name: Herman, Lee
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Micranops

description: Micranops Cameron Figures 12, 18, 19, 256, 259–285. Micranops Cameron, 1913: 350. Type species:
description: Published as part of Herman, Lee, 2023, Generic Revisions Of The Scopaeina And The Sphaeronina (Coleoptera: Staphylinidae: Paederinae: Lathrobiini), pp. 1-195 in Bulletin of the American Museum of Natural History 2023 (460) on page 121, DOI: 10.1206/0003-0090.460.1.1, http://zenodo.org/record/8110297
description: {"references": ["Cameron, M. 1913. Descriptions of new species of Staphylinidae from the West Indies. Part I. Annals and Magazine of Natural History (8) 12: 321 - 351."]}