cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
ClF diatomic molecule: rovibrational spectra
Creators: name: Pilon, Horacio Olivares
name: Turbiner, Alexander V
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Following the first principles the analytic Born-Oppenheimer (BO) potential curve for the ground state $X^1Σ^+$ of the molecule ClF is proposed for whole range of internuclear distances $R \in [0,\infty)$. It is based on matching the perturbation theory at small internuclear distances $R$ and multipole expansion at large distances $R$, it has the form of two-point Pade approximant and provides 3-4 figures in rovibrational energies. It supports 5719 rovibrational states with maximal vibrational number $ν_{max} = 47$ and maximal angular momentum $L_{max} = 210$ including 36 weakly-bound states close to threshold (to dissociation limit) with the energies $\lesssim 10^{-4}$ Hartree. The van der Waals constant $C^{(ClF)}_6\ \sim\ 29.3$ a.u. is predicted.
description: 12 pages, 2 figures; post-publication version Chemical Physics Letters 799 (2022) 139642: a few important typos fixed, Appendix with Mathematica-12 code for solving the nuclear Schroedinger equation in Lagrange Mesh Method added
Passive mode-locking under higher order effects
Creators: name: Horikis, Theodoros P.
name: Ablowitz, Mark J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: The response of a passive mode-locking mechanism, where gain and spectral filtering are saturated with the energy and loss saturated with the power, is examined under the presence of higher order effects. These include third order dispersion, self-steepening and Raman gain. The locking mechanism is maintained even with these terms; mode-locking occurs for both the anomalous and normal regimes. In the anomalous regime, these perturbations are found to affect the speed but not the structure of the (locked) pulses. In fact, these pulses behave like solitons of a classical nonlinear Schrodinger equation and as such a soliton perturbation theory is used to verify the numerical observations. In the normal regime, the effect of the perturbations is small, in line with recent experimental observations. The results in the normal regime are verified mathematically using a WKB type asymptotic theory. Finally, bi-solitons are found to behave as dark solitons on top of a stable background and are significantly affected by these perturbations.
Modeling of thermomechanical fracture of functionally graded materials with respect to multiple cracks interaction
Creators: name: Petrova Vera, E.
name: Schmauder Siegfried
Publisher: name: Физическая мезомеханика
Year: 2017
Subjects: EDGE AND INTERNAL CRACKING
THERMAL FRACTURE
FUNCTIONALLY GRADED COATING
STRESS INTENSITY FACTORS
FRACTURE CRITERIA
FRACTURE ANGLE
КРАЕВЫЕ И ВНУТРЕННИЕ ТРЕЩИНЫ
ТЕРМИЧЕСКОЕ РАЗРУШЕНИЕ
ФУНКЦИОНАЛЬНОЕ ГРАДИЕНТНОЕ ПОКРЫТИЕ
КОЭФФИЦИЕНТЫ ИНТЕНСИВНОСТИ НАПРЯЖЕНИЙ
КРИТЕРИЙ РАЗРУШЕНИЯ
УГОЛ РАЗРУШЕНИЯ

description: Different aspects of thermomechanical fracture of functionally graded materials (FGMs) are considered. Among them are the crack interaction problems in a functionally graded coating on a homogeneous substrate (FGM/H). The interaction between systems of edge cracks is investigated, as well as, how this mutual interaction influences the fracture process and the formation of crack patterns. The problem is formulated with respect to singular integral equations which are referred to the boundary equation methods. The FGM properties are modeled by exponential functions. The main fracture characteristics are calculated, namely, the stress intensity factors, the angles of deviation of the cracks from their initial propagation direction and the critical stresses when the crack starts to propagate. The last two characteristics are calculated using an appropriate fracture criterion. The problem contains different parameters, such as the geometry (location and orientation of cracks, their lengths, and the width of the FGM layer) and material parameters, i.e. the inhomogeneity parameters of elastic and thermal coefficients of the functionally graded material. The influence of these parameters on the thermomechanical fracture of FGM/H is investigated. As examples the following real material combinations are discussed: TiC/SiC, Al2O3/ MoSi2, MoSi2/SiC, ZrO2/nickel and ZrO2/steel.
The Third Law of Galactic Rotation
Creators: name: McGaugh, Stacy S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I review the connection between dynamics and the baryonic mass distribution in rotationally supported galaxies. The enclosed dynamical mass-to-light ratio increases with decreasing galaxy luminosity and surface brightness. The correlation with surface brightness appears to be the more fundamental, with the dependence on luminosity following simply from the weaker correlation between luminosity and surface brightness. In addition to this global relation, there is also a local relation between the amplitude of the mass discrepancy and the acceleration predicted by the observed distribution of baryons. I provide an empirical calibration of this mass discrepancy-acceleration relation. The data are consistent with the operation of a singe effective force law in disk galaxies, making this relation tantamount to a natural law. I further provide formulae by which the radial dark matter distribution can be estimated from surface photometry. The form of the dark matter halo depends uniquely on the distribution of baryons in each galaxy, and in general is neither a cusp nor a core. It remains difficult to see how galaxy formation models can reproduce the observed behavior, which is uniquely predicted by MOND.
description: Accepted for publication in Galaxies. Solicited contribution to the Special Issue "Beyond Standard Gravity and Cosmology" (ed. A. Diaferio). 23 pages, 7 figures
Micropolar theory with production of rotational inertia: a Farewell to material description
Creators: name: Müller Wolfgang, H.
name: Vilchevskaya Elena, N.
name: Weiss Wolf
Publisher: name: Физическая мезомеханика
Year: 2017
Subjects: MICROPOLAR MEDIA
SPATIAL DESCRIPTION
CHARACTERISTICS
TRANSPORT EQUATIONS
МИКРОПОЛЯРНЫЕ СРЕДЫ
ПРОСТРАНСТВЕННОЕ ОПИСАНИЕ
ХАРАКТЕРИСТИКИ
УРАВНЕНИЯ ПЕРЕНОСА

description: This paper takes a new look at micropolar media. Initially the necessary theoretical framework for a micropolar continuum is presented. To this end the standard macroscopic equations for mass, linear and angular momentum are complemented by a recently proposed kinetic equation for the moment of inertia tensor containing a production term. The main purpose of this paper is to study possible forms of this production term and its effects. For this reason two examples are investigated. In the first example we study a continuum of hollow particles subjected to an external pressure and gravity, such that the number of particles does not change. In the second example a continuous stream of matter through a crusher is considered so that the total number of particles will change. In context with these examples it will also become clear that the traditional Lagrangian way of describing the motion of solids is no longer adequate and should be superseded by an Eulerian approach.
A Partition Identity Related to Stanley's Theorem
Creators: name: Merca, Mircea
name: Schmidt, Maxie D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A17, 11B75, 11P81

description: In this paper, we use the Lambert series generating function for Euler's totient function to introduce a new identity for the number of $1$'s in the partitions of $n$. A new expansion for Euler's partition function $p(n)$ is derived in this context. These surprising new results connect the famous classical totient function from multiplicative number theory to the additive theory of partitions.
description: Preprint version of the article submitted for publication in 2017
Micropolar theory from the viewpoint of mesoscopic and mixture theories
Creators: name: Müller Wolfgang, H.
name: Vilchevskaya Elena, N.
Publisher: name: Физическая мезомеханика
Year: 2017
Subjects: MICROPOLAR MEDIA
SPATIAL DESCRIPTION
RATIONAL MIXTURE THEORY
CHARACTERISTICS
TRANSPORT EQUATIONS
МИКРОПОЛЯРНЫЕ СРЕДЫ
ПРОСТРАНСТВЕННОЕ ОПИСАНИЕ
РАЦИОНАЛЬНАЯ ТЕОРИЯ СМЕСИ
ХАРАКТЕРИСТИКИ
УРАВНЕНИЯ ПЕРЕНОСА

description: This paper takes a nontraditional look at micropolar media. It emphasizes the idea that it may become necessary to abandon the concept of material particles if one wishes to describe micropolar matter in which structural changes or chemical reactions occur. Based on recent results presented by Ivanova and Vilchevskaya (2016) we will proceed as follows. First we shall summarize the theory required for handling such situations in terms of a single macroscopic continuum. One of its main features are new balance equations for the local tensors of inertia containing production terms. The new balances and in particular the productions will then be interpreted mesoscopically by taking the inner structure of micropolar matter into account. As an alternative way of understanding the new relations we shall also attempt to use the concepts of the theory of mixtures. However, we shall see by example that this line of reasoning has its limitations: A binary mixture of electrically charged species subjected to gravity will segregate. Hence it is impossible to use a single continuum for modeling this kind of motion. However, in this context it will also become clear that the traditional Lagrangian way of describing motion of structurally transforming materials is no longer adequate and should be superseded by the Eulerian approach
Inverse spin crossover in fluorinated Fe(1,10-phenanthroline)$_2$(NCS)$_2$ adsorbed on Cu (001) surface
Creators: name: Pasquier, R.
name: Rassoul, K.
name: Alouani, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Density functional theory (DFT) including van der Waals weak interaction in conjunction with the so called rotational invariant DFT+U, where $U$ is the Hubbard interaction of the iron site, is used to show that the fluorinated spin crossover Fe(phen$)_{2}$(NCS$)_{2}$ molecule whether in the gas phase or adsorbed on Cu(001) surface switches from the original low spin state to the high spin state. Using Bader electron density analysis, this inversion of the spin-crossover is explained in terms of electron doping of the Fe-octahedron cage which led to an increase of the Fe-N bond lengths. Consequently, the ligand-field splitting is drastically reduced, making the high-spin ground state more stable than the low-spin state. The calculated scanning tunneling microscopy (STM) images in the Tersoff-Hamann approximation show a clear distinction between the fluorinated and the unfluorinated molecule. This theoretical prediction is awaiting future STM experimental confirmation.
description: 20 pages, 7 figures
Report on outstanding open questions and prioritized R&D guidelines for Energy Recovery Linacs
Creators: name: ARIES WP6 Members
Publisher: name: Zenodo
Year: 2021

description: Energy Recovery linacs (ERLs) are a class of electron accelerators which could achieve extremely high beam intensities at moderate operating costs by recovering the beam energy, i.e. the energy of the accelerated particles, after their experimental use. The future pathway goes towards multi MW facilities, calling for the establishment of the technology required for stable high current operation. Some smaller ERLs are already in existence. Further research is needed on the following topics: ERL operation, beam dynamics, injectors, Superconducting Radiofrequency (SRF) systems and ERL applications.
description: {"references": ["ARIES Del6.4"]}
Particle and photon orbits in McVittie spacetimes
Creators: name: Nolan, Brien C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: McVittie spacetimes represent an embedding of the Schwarzschild field in isotropic cosmological backgrounds. Depending on the scale factor of the background, the resulting spacetime may contain black and white hole horizons, as well as other interesting boundary features. In order to further clarify the nature of these spacetimes, we address this question: do there exist bound particle and photon orbits in McVittie spacetimes? Considering first circular photon orbits, we obtain an explicit characterization of all McVittie spacetimes for which such orbits exist: there is a 2-parameter class of such spacetimes, and so the existence of a circular photon orbit is a highly specialised feature of a McVittie spacetime. However, we prove that in two large classes of McVittie spacetimes, there are bound particle and photon orbits: future-complete non-radial timelike and null geodesics along which the areal radius $r$ has a finite upper bound. These geodesics are asymptotic at large times to circular orbits of a corresponding Schwarzschild or Schwarzschild-de Sitter spacetime. The existence of these geodesics lays the foundations for and shows the theoretical possibility of the formation of accretion disks in McVittie spacetimes. We also summarize and extend some previous results on the global structure of McVittie spacetimes. The results on bound orbits are established using centre manifold and other techniques from the theory of dynamical systems.
description: 26 pages, 12 figures
The time asymptotic expansion for the compressible Euler equations with time-dependent damping
Creators: name: Geng, Shifeng
name: Huang, Feimin
name: Jin, Guanghui
name: Wu, Xiaochun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we study the compressible Euler equations with time-dependent damping $-\frac{1}{(1+t)^λ}ρu$. We propose a time asymptotic expansion around the self-similar solution of the generalized porous media equation (GPME) and rigorously justify this expansion as $λ\in (\frac17,1)$. In other word, instead of the self-similar solution of GPME, the expansion is the best asymptotic profile of the solution to the compressible Euler equations with time-dependent damping.
The Cocoon Nebula and its ionizing star: do stellar and nebular abundances agree?
Creators: name: García-Rojas, J.
name: Simón-Díaz, S.
name: Esteban, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: (Abridged) Main sequence massive stars embedded in an HII region should have the same chemical abundances as the surrounding nebular gas+dust. The Cocoon nebula, a close-by Galactic HII region ionized by a narrow line B0.5 V single star (BD+46 3474), is an ideal target to perform a detailed comparison of nebular and stellar abundances in the same Galactic HII region. We investigate the chemical content of O, N and S in the Cocoon nebula from two different points of view: an empirical analysis of the nebular spectrum and a detailed spectroscopic analysis of its ionizing B-type star using state-of-the-art stellar atmosphere modeling. By comparing the stellar and nebular abundances, we aim to indirectly address the long-standing problem of the discrepancy found between abundances obtained from collisionally excited lines (CELs) and optical recombination lines in photoionized nebulae. We collect spatially resolved spectroscopy of the Cocoon nebula and a high resolution optical spectrum of its ionizing star. Standard nebular techniques are used to compute the physical conditions and gaseous abundances of O, N and S. We perform a self-consistent spectroscopic abundance analysis of BD+46 3474 based on the atmosphere code FASTWIND to determine the stellar parameters and Si, O, and N abundances. The Cocoon nebula and its ionizing star, located at a distance of 800+-80 pc, have a very similar chemical composition as the Orion nebula and other B-type stars in the solar vicinity. This result agrees with the high degree of homogeneity of the present-day composition of the solar neighbourhood as derived from the study of the local cold-gas ISM. The comparison of stellar and nebular CELs abundances in the Cocoon nebula indicates that O and N gas+dust nebular values are in better agreement with stellar ones assuming small temperature fluctuations, of the order of those found in the Orion nebula.
description: Accepted for publication in A&A. 13 pages, 7 tables and 6 figures
Examining the role of Nucleoredoxin (NRX) in Amyotrophic Lateral Sclerosis (ALS)
Creators: name: Mumtaz, Naima
Publisher: name: Macquarie University
Year: 2023
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disorder that progresses rapidly and affects motor neurons in the brain, brainstem and spinal cord. Pathological forms of TAR DNA-binding protein-43 (TDP-43) are recognized as the major hallmarks of ALS. Inclusion formation, cytoplasmic aggregation of nuclear TDP-43, dysregulated nucleocytoplasmic transport and oxidative stress are all implicated as important pathogenic mechanisms. However, there is no effective treatment for ALS, so there is an urgent need to find new therapeutic targets. As a redox-regulated chaperone, nucleoredoxin (NRX) is known to inhibit protein misfolding and oxidative stress. Furthermore, it is normally present in the nucleus, but it shuttles to the cytoplasm, similar to TDP-43 and other proteins associated with ALS. It is therefore conceivable that NRX may be a possible therapeutic target for ALS given its major role in guarding the nucleus against redox dysregulation. However, a role for NRX has not been investigated previously in ALS. In this study, NRX was found to be protective against the mislocalization of TDP-43, inclusion formation, nuclear morphology, and nucleocytoplasmic transport dysfunction in neuronal cells. Mutant TDP-43 induces irregular, invaginated morphological changes to the nucleus in neurons, and here we examined nuclear morphology by immunocytochemistry using antibodies against components of the nuclear pore complexes (NPCs). NES-tdTomato-NLS, a fluorescent reporter, was used to study abnormalities in nucleocytoplasmic transport caused by mutant TDP-43 M337V. This is frequently used to study nucleocytoplasmic transport because when the nuclear import mechanism is dysregulated, it accumulates in the cytoplasm. Quantitative analysis revealed that NRX reduced the nuclear-to-cytoplasmic (N/C) localization of the fluorescent reporter in cells expressing mutant TDP-43 M337V. Similarly, we also examined RanGAP1, a significant regulator of nucleocytoplasmic transport that is mislocalized to the cytoplasm in ALS, and found that overexpressing NRX prevented this mislocalization. This study, therefore, demonstrates that NRX is protective against important pathological features associated with ALS. In addition, a preliminary study was performed to optimize the detection of FoxO proteins using immunocytochemistry. These transcription factors play a significant role in protein misfolding, oxidative stress, and aging, but have been poorly studied in ALS.
Von Neumann equivalence and group exactness
Creators: name: Battseren, Bat-Od
Publisher: name: arXiv
Year: 2022
Subjects: subject: Operator Algebras (math.OA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: We will show that group exactness is a von Neumann equivalence invariant. This result generalizes the previously known fact stating that group exactness is invariant under measure equivalence and W*-equivalence.
description: 10 pages
Molecular dynamics investigations of the strengthening of Al-Cu alloys during thermal ageing
Creators: name: Verestek Wolfgang
name: Prskalo Alen-Pilip
name: Hummel Martin
name: Binkele Peter
name: Schmauder Siegfried
Publisher: name: Физическая мезомеханика
Year: 2017
Subjects: MOLECULAR DYNAMICS
AL-CU ALLOYS
GUINIER-PRESTON ZONES
DISLOCATION
CRITICAL RESOLVED SHEAR STRESS
PRECIPITATE STRENGTHENING
EMBEDDED ATOM METHOD POTENTIAL
МОЛЕКУЛЯРНАЯ ДИНАМИКА
СПЛАВЫ AL-CU
ЗОНЫ ГИНЬЕ-ПРЕСТОНА
ДИСЛОКАЦИЯ
ПРИВЕДЕННОЕ КРИТИЧЕСКОЕ КАСАТЕЛЬНОЕ НАПРЯЖЕНИЕ
УПРОЧНЕНИЕ ОСАДКА
ПОТЕНЦИАЛ ПОГРУЖЕННОГО АТОМА

description: Classical molecular dynamics simulations of the interaction of edge dislocations with solid soluted copper atoms and Guinier-Preston zones (I and II) in aluminium are performed using embedded atom method potentials. Hereby, the strengthening mechanism and its modulus are identified for different stages of thermally aged Al-Cu alloys. Critical resolved shear stresses are calculated for different concentrations of solid soluted copper. In case of precipitate strengthening, the Guinier-Preston zone size, its orientation and offset from the dislocation plane are taken as simulation parameters. It is found that in case of solid soluted copper, the critical resolved shear stress is proportional to the copper concentration. In case of the two subsequent aging stages both the dislocation depinning mechanism as well as the depinning stress are highly dependent on the Guinier-Preston zone orientation and to a lesser degree to its size
Hazards Associated with Ready-to-Eat Meat Consumed in Kebbi State, Nigeria
Creators: name: Ribah, Mohammed
name: Ribah, Mohammed
Publisher: name: Unknown
Year: 2022
Subjects: subject: Agricultural and Food Policy
subject: Safety
subject: Food
subject: Hazard
subject: Meat
subject: Nigeria

description: This pamphlet is a product of collaborative research funded by the USAID Nigeria mission under the Feed the Future Nigeria Agriculture Policy Activity and Michigan State University’s Alliance for African Partnership.
Hill approximation in a restricted four-body problem
Creators: name: Burgos-Garcia, Jaime
name: Gidea, Marian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We consider a restricted four-body problem on the dynamics of a massless particle under the gravitational force produced by three mass points forming an equilateral triangle configuration. We assume that the mass m3 of one primary is very small compared with the other two, m1 and m2, and we study the Hamiltonian system describing the motion of the massless particle in a neighborhood of m3. In a similar way to Hill approximation of the lunar problem, we perform a symplectic scaling, sending the two massive bodies to infinity, expanding the potential as a power series in m3, and taking the limit case when m3 tends to cero. We show that the limiting Hamiltonian inherits dynamical features from both the restricted three-body problem and the restricted four-body problem. In particular, it extends the classical lunar Hill problem. We investigate the geometry of the Poincare sections, direct and retrograde periodic orbits about m3, libration points, periodic orbits near libration points, their stable and unstable manifolds, and the corresponding homoclinic intersections. The motivation for this model is the study of the motion of a satellite near a jovian Trojan asteroid.
description: This work is an improvement of a previous work
Amtliche Mitteilungen der Technischen Universität Dortmund Nr. 28/2024
Creators: name: (:Unkn) Unknown
Publisher: name: Technische Universität Dortmund
Year: 2024
Subjects: subject: 080

description: Korruptionspräventionsrichtlinie der Technischen Universität Dortmund
description: Amtliche Mitteilungen der Technischen Universität Dortmund;2024; 28
Chemical Pressure effect at the boundary of Mott insulator and itinerant electron limit of Spinel Vanadates
Creators: name: Shahi, P.
name: Kumar, A.
name: Singh, Rahul
name: Singh, Ripandeep
name: Sastry, P. U.
name: Das, A.
name: Joshi, Amish G.
name: Ghosh, A. K.
name: Banerjee, A.
name: Chatterjee, Sandip
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The chemical pressure effect on the structural, transport, magnetic and electronic properties (by measuring X-ray photoemission spectroscopy) of ZnV2O4 has been investigated by doping Mn and Co on the Zinc site of ZnV2O4. With Mn doping the V-V distance increases and with Co doping it decreases. The resistivity and thermoelectric power data indicate that as the V-V distance decreases the system moves towards Quantum Phase Transition. The transport data also indicate that the conduction is due to the small polaron hopping. The chemical pressure shows the non-monotonous behaviour of charge gap and activation energy. The XPS study also supports the observation that with decrease of the V-V separation the system moves towards Quantum Phase Transition. On the other hand when Ti is doped on the V-site of ZnV2O4 the metal-metal distance decreases and at the same time the TN also increases.
description: 20 pages, 14 figures
Topological equivalence of submersion functions and topological equivalence of their foliations on the plane: the linear-like case
Creators: name: Braun, Francisco
name: Meza-Sarmiento, Ingrid S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37C10, 57R30, 58K65

description: Let $f, g: \mathbb{R}^2 \to \mathbb{R}$ be two submersion functions and $\mathscr{F}(f)$ and $\mathscr{F}(g)$ be the regular foliations of $\mathbb{R}^2$ whose leaves are the connected components of the levels sets of $f$ and $g$, respectively. The topological equivalence of $f$ and $g$ implies the topological equivalence of $\mathscr{F}(f)$ and $\mathscr{F}(g)$, but the converse is not true, in general. In this paper, we introduce the class of linear-like submersion functions, which is wide enough in order to contain non-trivial behaviors, and provide conditions for the validity of the converse implication for functions inside this class. Our results lead us to a complete topological invariant for topological equivalence in a certain subclass of linear-like submersion functions.
High-field magnetic resonance of spinons and magnons in a triangular lattice S=1/2 antiferromagnet Cs2CuCl4
Creators: name: Smirnov, A. I.
name: Soldatov, T. A.
name: Povarov, K. Yu.
name: Shapiro, A. Ya.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The electron spin resonance doublet indicating the width of the two spinon continuum in a spin-1/2 triangular-lattice Heisenberg antiferromagnet Cs2CuCl4 was studied in high magnetic field. The doublet was found to collapse in a magnetic field of a half of the saturation field. The collapse of the doublet occurs via vanishing of the high frequency component in a qualitative agreement with the theoretical prediction for the S=1/2 chain. The field of the collapse is, however, much lower than expected for the S=1/2 chain. This is proposed to be due to the destruction of frustration of interchain exchange bonds in a magnetic field, which restores the 2D character of this spin system. In the saturated phase the mode with the Larmor frequency and a much weaker mode downshifted for 119~GHz are observed. The weak mode is of exchange origin, it demonstrates a positive frequency shift at heating corresponding to the repulsion of magnons in the saturated phase.
description: 7 pages 7 figures
Phytochemical analysis of the methanolic extract from the mangrove species Avicennia marina plant species inhabited in coastal water
Creators: name: Govindhan, Perumal
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Plant Biology

description: The mangrove, a vital ecosystem, faces significant threats from climate change, human actions, and pollution. This study aims to evaluate the presence and distribution of trace metals (Cu, Cd, Ni, Pb, and Zn) in Avicennia marina leaves and sediments, shedding light on A. marina’s antioxidant capabilities amidst metal pollution. Samples were gathered from Pichavaram coastal areas. Various pollution indices such as contamination factor (CF), pollution load index (PLI), and bio concentration factor (BCF) were utilised to gauge pollution levels. Analysis via LC/MS,1H & 13C-NMR, and GC/MS revealed 52 compounds in the methanolic extract of A. marina notably; the extract contains pentanoic acid, decanoic acid, diethyl hydroxylamine, pyrrolidine, 4-chlorophenyl, octadecylisocyanate, thiazolidinones, and arabinopyranoside. These compounds exhibit diverse biological properties, such as antioxidative, anticancer, antimicrobial, anti-inflammatory, antiallergic, antiaging, and antiartherosclerotic effects, making them promising herbal medicines with minimal adverse effects and maximum efficacy, thereby improving the quality of life during treatment.
title: Compound-specific Isotope Analyses of Crude Oils from the Onshore Canning Basin, Western Australia - Data Release.
Creators: name: D., Edwards
name: D.S., Edwards
name: J, Sohn
name: E., Grosjean
name: C.J., Boreham
name: A.J., Mory
Publisher: name: Commonwealth of Australia (Geoscience Australia)
Year: 2023
Subjects: subject: EFTF – Exploring for the Future
subject: Canning Basin
subject: crude oils
subject: compound-specific isotope analyses
subject: Organic geochemistry
subject: Isotope geochemistry
subject: Published_External

description: Geoscience Australia’s Exploring for the Future (EFTF) program provides precompetitive information to inform decision-making by government, community and industry on the sustainable development of Australia's mineral, energy and groundwater resources. By gathering, analysing and interpreting new and existing precompetitive geoscience data and knowledge, we are building a national picture of Australia’s geology and resource potential. This leads to a strong economy, resilient society and sustainable environment for the benefit of all Australians. This includes supporting Australia’s transition to net zero emissions, strong, sustainable resources and agriculture sectors, and economic opportunities and social benefits for Australia’s regional and remote communities. The EFTF program, which commenced in 2016, is an eight year, $225m investment by the Australian Government.The onshore Canning Basin in Western Australia was the focus of a regional hydrocarbon prospectivity assessment undertaken by the EFTF program dedicated to increasing investment in resource exploration in northern Australia, with the objective being to acquire new data and information about the potential mineral, energy and groundwater resources concealed beneath the surface. As part of this program, significant work has been carried out to deliver pre-competitive data in the region including new seismic acquisition, drilling of a stratigraphic well, and geochemical analysis from historic exploration wells.As part of this program, a compilation of the compound-specific isotopic compositions of crude oils from 30 petroleum wells in the Canning Basin have been completed. The samples were analysed in Geoscience Australia’s Isotope and Organic Geochemistry Laboratory and the collated results are released in this report. This report provides additional stable carbon and hydrogen isotopic data to build on the oil-oil correlations previously established by Edwards and Zumberge (2005) and Edwards et al. (2013). This information can be used in future geological programs to determine the origin of the crude oils, and hence increase our understanding of the Larapintine Petroleum Supersystem, as established by Bradshaw (1993) and Bradshaw et al. (1994).
On the number of integral ideals in a number field
Creators: name: Lee, Ethan Simpson
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 11R04, 11R59, 11Y40

description: We update Sunley's explicit estimate for the ideal-counting function, which is the number of integral ideals of bounded norm in a number field.
description: 26 pages, 6 tables, comments welcome! Updates explained in the article
Generalised symmetries and bases for Dunkl monogenics
Creators: name: De Bie, Hendrik
name: Langlois-Rémillard, Alexis
name: Oste, Roy
name: Van der Jeugt, Joris
Publisher: name: arXiv
Year: 2022
Subjects: subject: Representation Theory (math.RT)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 20F55, 43A32, 30G35, 33C52, 33C55

description: We introduce a family of commuting generalised symmetries of the Dunkl--Dirac operator inspired by the Maxwell construction in harmonic analysis. We use these generalised symmetries to construct bases of the polynomial null-solutions of the Dunkl--Dirac operator. These polynomial spaces form representation spaces of the Dunkl--Dirac symmetry algebra. For the $\mathbb{Z}_2^d$ case, the results are compared with previous investigations.
description: 18 pages, typos corrected, authors's accepted version for publication in Rocky Mountain J. Math
Non-Markovian Quantum State Diffusion for Spin Environments
Creators: name: Link, Valentin
name: Luoma, Kimmo
name: Strunz, Walter T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce an exact open system method to describe the dynamics of quantum systems that are strongly coupled to specific types of environments comprising of spins, such as central spin systems. Our theory is similar to the established non-Markovian quantum state diffusion (NMQSD) theory, but for a spin bath instead of a Gaussian bath. The method allows us to represent the time-evolved reduced state of the system as an ensemble average of stochastically evolving pure states. We present a comprehensive theory for arbitrary linear spin environments at both zero and finite temperatures. Furthermore, we introduce a hierarchical expansion method that enables the numerical computation of the time evolution of the stochastic pure states, facilitating a numerical solution of the open system problem in relevant strong coupling regimes.
The (theta, wheel)-free graphs Part I: only-prism and only-pyramid graphs
Creators: name: Diot, Emilie
name: Radovanović, Marko
name: Trotignon, Nicolas
name: Vušković, Kristina
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C75

description: Truemper configurations are four types of graphs (namely thetas, wheels, prisms and pyramids) that play an important role in the proof of several decomposition theorems for hereditary graph classes. In this paper, we prove two structure theorems: one for graphs with no thetas, wheels and prisms as induced subgraphs, and one for graphs with no thetas, wheels and pyramids as induced subgraphs. A consequence is a polynomial time recognition algorithms for these two classes. In Part II of this series we generalize these results to graphs with no thetas and wheels as induced subgraphs, and in Parts III and IV, using the obtained structure, we solve several optimization problems for these graphs.
Coloring Square-free Berge Graphs
Creators: name: Chudnovsky, Maria
name: Lo, Irene
name: Maffray, Frederic
name: Trotignon, Nicolas
name: Vuskovic, Kristina
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We consider the class of Berge graphs that do not contain a chordless cycle of length $4$. We present a purely graph-theoretical algorithm that produces an optimal coloring in polynomial time for every graph in that class.
Stable sets in {ISK4,wheel}-free graphs
Creators: name: Milanič, Martin
name: Penev, Irena
name: Trotignon, Nicolas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: An ISK4 in a graph G is an induced subgraph of G that is isomorphic to a subdivision of K4 (the complete graph on four vertices). A wheel is a graph that consists of a chordless cycle, together with a vertex that has at least three neighbors in the cycle. A graph is {ISK4,wheel}-free if it has no ISK4 and does not contain a wheel as an induced subgraph. We give an O(|V(G)|^7)-time algorithm to compute the maximum weight of a stable set in an input weighted {ISK4,wheel}-free graph G with non-negative integer weights.
$χ$-bounds, operations and chords
Creators: name: Pham, Lan Anh
name: Trotignon, Nicolas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 05C75, 05C15, 05C85

description: A \emph{long unichord} in a graph is an edge that is the unique chord of some cycle of length at least 5. A graph is \emph{long-unichord-free} if it does not contain any long-unichord. We prove a structure theorem for long-unichord-free graph. We give an $O(n^4m)$-time algorithm to recognize them. We show that any long-unichord-free graph $G$ can be colored with at most $O(ω^3)$ colors, where $ω$ is the maximum number of pairwise adjacent vertices in $G$.
Categories of Quantum and Classical Channels (extended abstract)
Creators: name: Coecke, Bob
name: Heunen, Chris
name: Kissinger, Aleks
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Category Theory (math.CT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We introduce the CP*-construction on a dagger compact closed category as a generalisation of Selinger's CPM-construction. While the latter takes a dagger compact closed category and forms its category of "abstract matrix algebras" and completely positive maps, the CP*-construction forms its category of "abstract C*-algebras" and completely positive maps. This analogy is justified by the case of finite-dimensional Hilbert spaces, where the CP*-construction yields the category of finite-dimensional C*-algebras and completely positive maps. The CP*-construction fully embeds Selinger's CPM-construction in such a way that the objects in the image of the embedding can be thought of as "purely quantum" state spaces. It also embeds the category of classical stochastic maps, whose image consists of "purely classical" state spaces. By allowing classical and quantum data to coexist, this provides elegant abstract notions of preparation, measurement, and more general quantum channels.
description: In Proceedings QPL 2012, arXiv:1407.8427
Availability of Disaster Preparedness and Digitization in Archives.pdf
Creators: name: Obi, Dr. Hilda Eno
Publisher: name: figshare
Year: 2023
Subjects: Technical, further and workplace education
Education systems not elsewhere classified
Professional education and training

description: This study ascertained availability of disaster preparedness and digitization in archives preservation in public libraries in Rivers state. Two objectives and its corresponding research questions and hypotheses guided this study. The descriptive survey design was adopted for this study. The target population of this study comprised 514 library staff drawn from Rivers state library board and staff from Jubilee library Port Harcourt. The sample size for this study was 399 library staff comprising of 227 staff from Rivers state library board and 172 library staff from Jubilee library Port Harcourt. The sample size was determined by Taro Yamane sample size determination formula while a two-stage sampling technique of stratified and simple random sampling techniques was used to select the sample size. A self-structured questionnaire titled availability of disaster preparedness and digitization in archives preservation questionnaire was used as the instrument for data collection. Face and content validation was ensured by three experts. The instrument yielded reliability coefficients of 0.79 with the use of Cronbach Alpha reliability method. Meanand Standard Deviation was used in answering research questions while z-test was used for the inferential statistics. The findings revealed that disaster preparedness and digitization in the preservation of archives are supported and available in public libraries in Rivers state, Nigeria. Based on the findings, it can be concluded that there are significant differences in the responses of Rivers state library board staff and Jubilee library Port Harcourt staff on the terms of the availability of the disaster preparedness and digitization in archive preservation in the public libraries. It was therefore recommended that more librarians should be employed by the Rivers state government so as to make the process of archive preservation in the State’s public libraries through disaster preparedness and digitization less rigorous and efficient.
Projective geometry of homogeneous second order Hamiltonian operators
Creators: name: Vergallo, Pierandrea
name: Vitolo, Raffaele
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We prove the invariance of homogeneous second-order Hamiltonian operators under the action of projective reciprocal transformations. We establish a correspondence between such operators in dimension $n$ and $3$-forms in dimension $n + 1$. In this way we classify second order Hamiltonian operators using the known classification of $3$-forms in dimensions $\leq$ 9. Systems of first-order conservation laws that are Hamiltonian with respect to such operators are also explicitly found. The integrability of the systems is discussed in detail.
Asympiesiella india Girault
Creators: name: Swezey, O. H.
Publisher: name: Zenodo
Year: 1946
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Aphelinidae
Asympiesiella
Asympiesiella india

description: 43.Asympiesiella india Girault, Canad. Ent. 48: 341, 1916. Barrigada, July 22, ex leafminer in Jntsia bijuga, Swezey; Dededo, Aug. 11, ex leafroller on undetermined tree, Swezey. Two specimens, one retained in U. S. National Museum.
description: Published as part of Swezey, O. H., 1946, Notes On Some Guam Chalcidoidea, pp. 211-219 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum on page 217, DOI: 10.5281/zenodo.5173516
Induced subgraphs and tree decompositions IV. (Even hole, diamond, pyramid)-free graphs
Creators: name: Abrishami, Tara
name: Chudnovsky, Maria
name: Hajebi, Sepehr
name: Spirkl, Sophie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: A hole in a graph $G$ is an induced cycle of length at least four, and an even hole is a hole of even length. The diamond is the graph obtained from the complete graph $K_4$ by removing an edge. A pyramid is a graph consisting of a triangle called the base, a vertex called the apex, and three internally disjoint paths starting at the apex and disjoint otherwise, each joining the apex to a vertex of the base. For a family $\mathcal{H}$ of graphs, we say a graph $G$ is $\mathcal{H}$-free if no induced subgraph of $G$ is isomorphic to a member of $\mathcal{H}$. Cameron, da Silva, Huang, and Vušković proved that (even hole, triangle)-free graphs have treewidth at most five, which motivates studying the treewidth of even-hole-free graphs of larger clique number. Sintiari and Trotignon provided a construction of (even hole, pyramid, $K_4$)-free graphs of arbitrarily large treewidth. Here, we show that for every $t$, (even hole, pyramid, diamond, $K_t$)-free graphs have bounded treewidth. The graphs constructed by Sintiari and Trotignon contain diamonds, so our result is sharp in the sense that it is false if we do not exclude diamonds. Our main result is in fact more general, that treewidth is bounded in graphs excluding certain wheels and three-path-configurations, diamonds, and a fixed complete graph. The proof uses "non-crossing decompositions" methods similar to those in previous papers in this series. In previous papers, however, bounded degree was a necessary condition to prove bounded treewidth. The result of this paper is the first to use the method of "non-crossing decompositions" to prove bounded treewidth in a graph class of unbounded maximum degree.
Die Antrittsenzyklika Papst Johannes' XXIII. "Ad Petri cathedram"
Creators: name: Johannes XXIII., Papst
Publisher: name: Herder Korrespondenz
Year: 1970

description: Herder Korrespondenz, Bd. 13 Nr. 11 (1958): Herder Korrespondenz, Band 13, Heft 11
Reduced smooth stacks?
Creators: name: Trentinaglia, Giorgio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Category Theory (math.CT)
subject: Differential Geometry (math.DG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 22A22, 58H05

description: An arbitrary Lie groupoid gives rise to a groupoid of germs of local diffeomorphisms over its base manifold, known as its effect. The effect of any bundle of Lie groups is trivial. All quotients of a given Lie groupoid determine the same effect. It is natural to regard the effects of any two Morita equivalent Lie groupoids as being equivalent. In this paper we shall describe a systematic way of comparing the effects of different Lie groupoids. In particular, we shall rigorously define what it means for two arbitrary Lie groupoids to give rise to equivalent effects. For effective orbifold groupoids, the new notion of equivalence turns out to coincide with the traditional notion of Morita equivalence. Our analysis is relevant to the presentation theory of proper smooth stacks.
description: 31 pages
The (theta, wheel)-free graphs Part II: structure theorem
Creators: name: Radovanović, Marko
name: Trotignon, Nicolas
name: Vušković, Kristina
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C75

description: A theta is a graph formed by three paths between the same pair of distinct vertices so that the union of any two of the paths induces a hole. A wheel is a graph formed by a hole and a node that has at least 3 neighbors in the hole. In this paper we obtain a decomposition theorem for the class of graphs that do not contain an induced subgraph isomorphic to a theta or a wheel, i.e. the class of (theta, wheel)-free graphs. The decomposition theorem uses clique cutsets and 2-joins. Clique cutsets are vertex cutsets that work really well in decomposition based algorithms, but are unfortunately not general enough to decompose more complex hereditary graph classes. A 2-join is an edge cutset that appeared in decomposition theorems of several complex classes, such as perfect graphs, even-hole-free graphs and others. In these decomposition theorems 2-joins are used together with vertex cutsets that are more general than clique cutsets, such as star cutsets and their generalizations (which are much harder to use in algorithms). This is a first example of a decomposition theorem that uses just the combination of clique cutsets and 2-joins. This has several consequences. First, we can easily transform our decomposition theorem into a complete structure theorem for (theta, wheel)-free graphs, i.e. we show how every (theta, wheel)-free graph can be built starting from basic graphs that can be explicitly constructed, and gluing them together by prescribed composition operations; and all graphs built this way are (theta, wheel)-free. Such structure theorems are very rare for hereditary graph classes, only a few examples are known. Secondly, we obtain an $\mathcal O (n^4m)$-time decomposition based recognition algorithm for (theta, wheel)-free graphs. Finally, in Parts III and IV of this series, we give further applications of our decomposition theorem.