cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Time-analyticity of Lagrangian particle trajectories in ideal fluid flow
Creators: name: Zheligovsky, Vladislav
name: Frisch, Uriel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Mathematical Physics (math-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: It is known that the Eulerian and Lagrangian structures of fluid flow can be drastically different; for example, ideal fluid flow can have a trivial (static) Eulerian structure, while displaying chaotic streamlines. Here we show that ideal flow with limited spatial smoothness (an initial vorticity that is just a little better than continuous), nevertheless has time-analytic Lagrangian trajectories before the initial limited smoothness is lost. For proving such results we use a little-known Lagrangian formulation of ideal fluid flow derived by Cauchy in 1815 in a manuscript submitted for a prize of the French Academy. This formulation leads to simple recurrence relations among the time-Taylor coefficients of the Lagrangian map from initial to current fluid particle positions; the coefficients can then be bounded using elementary methods. We first consider various classes of incompressible fluid flow, governed by the Euler equations, and then turn to a case of compressible flow of cosmological relevance, governed by the Euler-Poisson equations.
description: 26 pp., 2 figures, 51 references
Diversity in Schools: Immigrants and the Educational Performance of U.S.-Born Students
Creators: name: Figlio, David
name: Giuliano, Paola
name: Marchingiglio, Riccardo
name: Ozek, Umut
name: Sapienza, Paola
Publisher: name: Zenodo
Year: 2023

description: This replication package contains description for dataset construction, tables, and figures of the paper “Diversity in Schools: Immigrants and the Educational Performance of U.S.-Born Students” by David Figlio, Paola Giuliano, Riccardo Marchingiglio, Paola Sapienza, and Umut Ozek.
Astrophysical black holes in screened modified gravity
Creators: name: Davis, Anne-Christine
name: Gregory, Ruth
name: Jha, Rahul
name: Muir, Jessica
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Chameleon, environmentally dependent dilaton, and symmetron gravity are three models of modified gravity in which the effects of the additional scalar degree of freedom are screened in dense environments. They have been extensively studied in laboratory, cosmological, and astrophysical contexts. In this paper, we present a preliminary investigation into whether additional constraints can be provided by studying these scalar fields around black holes. By looking at the properties of a static, spherically symmetric black hole, we find that the presence of a non-uniform matter distribution induces a non-constant scalar profile in chameleon and dilaton, but not necessarily symmetron gravity. An order of magnitude estimate shows that the effects of these profiles on in-falling test particles will be sub-leading compared to gravitational waves and hence observationally challenging to detect.
description: 31 pages, 10 figures, published version
Incoherent Control of the Retinal Isomerization in Rhodopsin
Creators: name: Lucas, Felix
name: Hornberger, Klaus
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We propose to control the retinal photoisomerization yield through the back-action dynamics imparted by a nonselective optical measurement of the molecular electronic state. This incoherent effect is easier to implement than comparable coherent pulse shaping techniques, and is also robust to environmental noise. A numerical simulation of the quantum dynamics shows that the isomerization yield of this important biomolecule can be substantially increased above the natural limit.
description: 5 pages, 3 figures
Advancement flap for facial firework injury repair. A case report
Creators: name: Marcela Rojas Hurtado M.D.
name: José Luis Villarreal Salgado M.D.
name: Luis Armando Lopez Rico M.D.
name: Carlos Enrique Luna Guerrero M.D.
name: Claudia Verónica Elizabeth  Vargas Hernández M.D.
name: Edgar Armando Morales F M.D.
Publisher: name: Zenodo
Year: 2024

description: Background: Facial injuries are a challenge for reconstructive surgery, they can generate disabling injuries, with irreversible aesthetic defects. Trauma due to fireworks injuries has an explosive power equal or greater than that of a hand grenade. These injuries are associated with significant tissue loss, extensive fractures, eye injuries and presence of foreign bodies. The main objective is to restore oral and ocular function and esthetics. The use of tissue expanders are a good option in patients in whom the quantity and quality of adjacent tissue is inadequate, and the defect is very significant. The following is a clinical case of a fireworks injury to the face with repair and placement of a tissue expander.

 

Keywords: Facial injuries, facial reconstruction, tissue expansion.
Whipped inflation
Creators: name: Hazra, Dhiraj Kumar
name: Shafieloo, Arman
name: Smoot, George F.
name: Starobinsky, Alexei A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by the idea that inflation occurs at the GUT symmetry breaking scale, in this paper we construct a new class of large field inflaton potentials where the inflaton starts with a power law potential; after initial period of relative fast roll that lasts until after a few e-folds inside the horizon, it transits to the attractor of the slow roll part of the potential with a lower power. Due to the initial fast roll stages of inflation, we find a suppression in scalar primordial power at large scales and at the same time the choice of the potential can provide us a tensor primordial spectrum with high amplitude. This suppression in scalar power with a large tensor-to-scalar ratio helps us to reconcile the Planck and BICEP2 data in a single framework. We find that a transition from a cubic to quadratic form of inflaton potential generates an appropriate suppression in power of scalar primordial spectrum that provides significant improvement in fit compared to power law model when compared with Planck and BICEP2 data together. We calculate the extent of non-Gaussianity, specifically, the bispectrum for the best fit potential and show that it is consistent with Planck bispectrum constraints.
description: 5 pages, 2 figures and 1 table; matches final version published in PRL
Entanglement spectrum and number fluctuations in the spin-partitioned BCS ground state
Creators: name: Puspus, Xavier M.
name: Villegas, Kristian Hauser
name: Paraan, Francis N. C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study entanglement between the spin components of the Bardeen-Cooper-Schrieffer (BCS) ground state by calculating the full entanglement spectrum and the corresponding von Neumann entanglement entropy. The entanglement spectrum is effectively modeled by a generalized Gibbs ensemble (GGE) of non-interacting electrons, which may be approximated by a canonical ensemble at the BCS critical temperature. We further demonstrate that the entanglement entropy is jointly proportional to the pairing energy and to the number of electrons about the Fermi surface (an area law). Furthermore, the entanglement entropy is also proportional to the number fluctuations of either spin component in the BCS state.
description: 6 pages, 3 figures. Some additions and corrections made
Шорин С.А. Правовое обеспечение цифровых технологий в бюджетной сфере // Ученые труды Российской академии адвокатуры и нотариата. 2018. № 1(48). С. 113-117.
Creators: name: Shorin, Sergey
Publisher: name: figshare
Year: 2022
Subjects: Banking, finance and securities law
Public law not elsewhere classified
Finance
Public administration
Information systems organisation and management
Information governance, policy and ethics

description: Целью настоящей статьи является оценка состояния правового обеспечения цифровых технологий в бюджетной сфере. Автор рассматривает ряд недостатков правового регулирования отношений, осуществляемых посредством применения цифровых технологий, установленного Бюджетным кодексом Российской Федерации и подзаконными нормативными правовыми актами. В статье обращается внимание на неполноту положений, определяющих правовой режим цифровых технологий, вплоть до практически полного отсутствия таких положений. Отмечается несоблюдение единого подхода к правовому обеспечению цифровых технологий. Для решения выявленных проблем автором приводятся отдельные размышления по каждой из них. Делается вывод о целесообразности установления комплексного правового обеспечения цифровых технологий, используемых в бюджетной сфере, путем внесения изменений в Бюджетный кодекс Российской Федерации и принятия постановления Правительства Российской Федерации по исследуемой тематике. При этом цифровые технологии должны будут регулироваться с учетом установленных правил.
Galaxy clusters and structure formation in quintessence versus phantom dark energy universe
Creators: name: Roupas, Zacharias
name: Axenides, Minos
name: Georgiou, George
name: Saridakis, Emmanuel N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The self-gravitating gas in the Newtonian limit is studied in the presence of dark energy with a linear and constant equation of state. Entropy extremization associates to the isothermal Boltzmann distribution an effective density that includes `dark energy particles', which either strengthen or weaken mutual gravitational attraction, in case of quintessence or phantom dark energy, respectively, that satisfy a linear equation of state. Stability is studied for microcanonical (fixed energy) and canonical (fixed temperature) ensembles. Compared to the previously studied cosmological constant case, in the present work it is found that quintessence increases, while phantom dark energy decreases the instability domain under gravitational collapse. Thus, structures are more easily formed in a quintessence rather than in a phantom dominated Universe. Assuming that galaxy clusters are spherical, nearly isothermal and in hydrostatic equilibrium we find that dark energy with a linear and constant equation of state, for fixed radius, mass and temperature, steepens their total density profile. In case of a cosmological constant, this effect accounts for a 1.5% increase in the density contrast, that is the center to edge density ratio of the cluster. We also propose a method to constrain phantom dark energy.
description: 12 pages, 6 figures; minor changes to match published version
Towards Quantifying Complexity with Quantum Mechanics
Creators: name: Tan, Ryan
name: Terno, Daniel R.
name: Thompson, Jayne
name: Vedral, Vlatko
name: Gu, Mile
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: While we have intuitive notions of structure and complexity, the formalization of this intuition is non-trivial. The statistical complexity is a popular candidate. It is based on the idea that the complexity of a process can be quantified by the complexity of its simplest mathematical model - the model that requires the least past information for optimal future prediction. Here we review how such models, known as $ε$-machines can be further simplified through quantum logic, and explore the resulting consequences for understanding complexity. In particular, we propose a new measure of complexity based on quantum $ε$-machines. We apply this to a simple system undergoing constant thermalization. The resulting quantum measure of complexity aligns more closely with our intuition of how complexity should behave.
description: 10 pages, 6 figure, Published in the Focus Point on Quantum information and complexity edition of EPJ Plus
Evaluating Fragility of Interdependent Design Spaces to Quantify the Risk of Space Reduction Decisions in Set-Based Design
Creators: name: Van Houten, Joseph
Publisher: name: My University
Year: 2023
Subjects: subject: Set-Based Design
subject: Navlal Design
subject: Uncertainty
subject: Naval Architecture and Marine Engineering
subject: Engineering

description: The litany of decisions made over the course of any marine vessel design have significant impacts on the design’s outcome. Iterative approaches, such as point-based design (PBD), make precise decisions on vessel characteristic values as necessitated by the sequence in which interdependent design activities are performed, but these decisions make PBD susceptible to inefficient rework cycles. To reduce the frequency and magnitude of rework, vessel char- acteristic assignments often coincide with previous designs of similar vessels, even if those designs are suboptimal. Contrarily, convergent approaches, such as set-based design (SBD), allow for more ambiguous definitions of vessel characteristics by making decisions that re- move unfavorable values while keeping ranges of values open. With this approach, SBD depends less on experience to reduce variable sets because that experience is supplemented by various sampling and modeling tools unique to each discipline. However, each discipline cannot thoroughly sample their design space, and it is common for modeling and requirement changes to transpire over the course of a design. Design managers need to reduce design spaces to meet project timelines and budgets, but in doing so, they risk having unexplored areas or design changes reveal important information that would have impacted those reduc- tions. Design managers currently lack any method that quantifies and regulates this risk. A novel way to do so may be through the creation of a framework and metrics rooted in Information Theory. Before developing a strategy to assess the risk of space reductions, this work explores the sequential decisions that make up a conventional PBD approach through a simple polynomial model. The formalization of designer influence and consequential re- work path properties relating to decisions made earlier in a sequence prompts a shift in approaching design through an iterative method to a convergent SBD method. Background research is conducted on entropy metrics from Information Theory that can evaluate design space fragility, and the creation of a framework with these metrics is proposed to quantify the risk of space reductions. Plans are set to test the framework and metrics with a new SBD problem and to develop a multidisciplinary adaptive sampling approach that alleviates high-risk reductions.
Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
Creators: name: Tabuchi, Yutaka
name: Ishino, Seiichiro
name: Ishikawa, Toyofumi
name: Yamazaki, Rekishu
name: Usami, Koji
name: Nakamura, Yasunobu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate large normal-mode splitting between a magnetostatic mode (the Kittel mode) in a ferromagnetic sphere of yttrium iron garnet and a microwave cavity mode. Strong coupling is achieved in the quantum regime where the average number of thermally or externally excited magnons and photons is less than one. We also confirm that the coupling strength is proportional to the square root of the number of spins. A nonmonotonic temperature dependence of the Kittel-mode linewidth is observed below 1 K and is attributed to the dissipation due to the coupling with a bath of two-level systems.
description: 5 pages, 4 figures
Maximum-Likelihood Approach to Topological Charge Fluctuations in Lattice Gauge Theory
Creators: name: Brower, R. C.
name: Cheng, M.
name: Fleming, G. T.
name: Lin, M. F.
name: Neil, E. T.
name: Osborn, J. C.
name: Rebbi, C.
name: Rinaldi, E.
name: Schaich, D.
name: Schroeder, C.
name: Voronov, G.
name: Vranas, P.
name: Weinberg, E.
name: Witzel, O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a novel technique for the determination of the topological susceptibility (related to the variance of the distribution of global topological charge) from lattice gauge theory simulations, based on maximum-likelihood analysis of the Markov-chain Monte Carlo time series. This technique is expected to be particularly useful in situations where relatively few tunneling events are observed. Restriction to a lattice subvolume on which topological charge is not quantized is explored, and may lead to further improvement when the global topology is poorly sampled. We test our proposed method on a set of lattice data, and compare it to traditional methods.
description: 7 pages, 6 figures. v2: update to published version
Precise Forecasting of Sky Images Using Spatial Warping
Creators: name: Julian, Leron
name: Sankaranarayanan, Aswin C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The intermittency of solar power, due to occlusion from cloud cover, is one of the key factors inhibiting its widespread use in both commercial and residential settings. Hence, real-time forecasting of solar irradiance for grid-connected photovoltaic systems is necessary to schedule and allocate resources across the grid. Ground-based imagers that capture wide field-of-view images of the sky are commonly used to monitor cloud movement around a particular site in an effort to forecast solar irradiance. However, these wide FOV imagers capture a distorted image of sky image, where regions near the horizon are heavily compressed. This hinders the ability to precisely predict cloud motion near the horizon which especially affects prediction over longer time horizons. In this work, we combat the aforementioned constraint by introducing a deep learning method to predict a future sky image frame with higher resolution than previous methods. Our main contribution is to derive an optimal warping method to counter the adverse affects of clouds at the horizon, and learn a framework for future sky image prediction which better determines cloud evolution for longer time horizons.
Investigating TprA/PhrA mediated regulation in Streptococcus pneumoniae
Creators: name: Banaz O. Kareem
Publisher: name: University of Leicester
Year: 2020
Subjects: Uncategorized

description: Streptococcus pneumoniae is one of the leading causes of death amongst children and elderly. Its ability to detect and adapt to the changing environmental stimuli is important for pathogenicity. Several transcriptional regulatory pathways have crucial roles on pneumococcal adaptation to environmental changes. TprA/PhrA quorum sensing (QS) system is one of a new family of regulatory systems shown to be involved in virulence, galactose utilisation, and neuraminidase production, and its potential utility as an anti-infective target had been demonstrated previously. However, it is not known in detail how TprA/PhrA contributes to the pneumococcal virulence, therefore, the goal of this study was to reveal the mechanism of TprA/PhrA mediated virulence in S. pneumoniae.The results showed that spd1517 and spd1947 regulated by TprA/PhrA quorum sensing system, are required for galactose and mucin utilisation in S. pneumoniae. Loss of spd1517 or spd1947 decreased the neuraminidase activity. SPD1517 has an impact on capsule biosynthesis and cell morphology as its deletion resulted in enlarged and elongated cells. I demonstrated that the pneumococcal galactose catabolic pathways are differentially expressed under different galactose and oxygen concentrations, and temperature ranges. Transcriptional reporter assays revealed that TprA and SPD1947 are activators of pneumococcal tagatose pathway, but these regulators have no significant effect on expression of galK, a key gene of the Leloir pathway. Putative binding motif sequences for TprA were identified in the pneumococcal genome. Two of the genes were identified as potentially regulated by TprA/PhrA through in silico analysis: spd1255 codes for an ABC transporter and spd0559, a galactose transporter. These were tested for interaction with TprA. It was found that spd1255 plays a role in import of PhrA peptide, and TprA interacts with the putative promoter region of spd0559, providing evidence that the TprA regulon may be wider than it was previously reported.
“The worst thing that could happen to us but unfortunately they have nowhere to go”: Colombian students’ contradictory views on Venezuelan migration, democratic crisis, and xenophobia
Creators: name: Bellino, Michelle
Publisher: name: My University
Year: 2023
Subjects: subject: education, Venezuela, Colombia, immigration, xenophobia
subject: Education
subject: Social Sciences

description: In this paper, we explore Colombian students’ views on Venezuelan migration. Despite contradictory feelings on the topic, our findings show the prevalence of (perceived) economic and security threats associated with migrants. Tensions emerged over perceptions that Venezuelan migration has shifted attention from unresolved domestic issues, contributing to nationalist and xenophobic sentiments. Young people also exhibited concerns about xenophobic discourse and showed efforts to resist the harms of mainstream narratives. We suggest that critical openings for curricular inquiry and dialogue in classrooms are needed to engage explicitly with young people’s concerns and to mitigate potential discrimination Venezuelans experience in schools.
The Quest for Optimal Sorting Networks: Efficient Generation of Two-Layer Prefixes
Creators: name: Codish, Michael
name: Cruz-Filipe, Luis
name: Schneider-Kamp, Peter
Publisher: name: arXiv
Year: 2014
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: Previous work identifying depth-optimal $n$-channel sorting networks for $9\leq n \leq 16$ is based on exploiting symmetries of the first two layers. However, the naive generate-and-test approach typically applied does not scale. This paper revisits the problem of generating two-layer prefixes modulo symmetries. An improved notion of symmetry is provided and a novel technique based on regular languages and graph isomorphism is shown to generate the set of non-symmetric representations. An empirical evaluation demonstrates that the new method outperforms the generate-and-test approach by orders of magnitude and easily scales until $n=40$.
Performance advantage of protective quantum measurements
Creators: name: Schlosshauer, Maximilian
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We compare the performance of protective quantum measurements to that of standard projective measurements. Performance is quantified in terms of the uncertainty in the measured expectation value. We derive an expression for the relative performance of these two types of quantum measurements and show explicitly that protective measurements can provide a significant performance advantage over standard projective measurements.
description: 7 pages, 5 figures, identical to published version
Quantum cosmological consistency condition for inflation
Creators: name: Calcagni, Gianluca
name: Kiefer, Claus
name: Steinwachs, Christian F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the quantum cosmological tunneling scenario for inflationary models. Within a path-integral approach, we derive the corresponding tunneling probability distribution. A sharp peak in this distribution can be interpreted as the initial condition for inflation and therefore as a quantum cosmological prediction for its energy scale. This energy scale is also a genuine prediction of any inflationary model by itself, as the primordial gravitons generated during inflation leave their imprint in the B-polarization of the cosmic microwave background. In this way, one can derive a consistency condition for inflationary models that guarantees compatibility with a tunneling origin and can lead to a testable quantum cosmological prediction. The general method is demonstrated explicitly for the model of natural inflation.
description: 1+16 pages, 3 figures. v2: typos corrected, minor improvement of the discussion
Higher-order QCD effects for associated WH production and decay at the LHC
Creators: name: Ferrera, Giancarlo
name: Grazzini, Massimiliano
name: Tramontano, Francesco
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider Standard Model Higgs boson production in association with a W boson in hadron collisions. We supplement the fully exclusive perturbative computation of QCD radiative effects up to next-to-next-to-leading order (NNLO) with the computation of the decay of the Higgs boson into a bb pair at next-to-leading order (NLO). We consider the selection cuts that are typically applied in the LHC experimental analysis, and we compare our fixed-order predictions with the results obtained with the MC@NLO event generator. We find that NLO corrections to the H -> bb decay can be important to obtain a reliable pT spectrum of the Higgs boson, but that, in the cases of interest, their effect is well accounted for by the parton shower Monte Carlo. NNLO corrections to the production process typically decrease the cross section by an amount which depends on the detail of the applied cuts, but they have a mild effect on the shape of the Higgs pT spectrum. We also discuss the effect of QCD radiative corrections on the invariant mass distribution of the Higgs candidate.
description: 18 pages, 7 figures. References and figure added. Version published on JHEP
CELPPLUS project update: Improved 2D cell culture for phenotypic in vitro models
Creators: name: Sutherland, Duncan
Publisher: name: Zenodo
Year: 2022
Subjects: in vitro models
cell culture
skin diseases
nanoscience

description: This is a recorded talk with head of the CELPPLUS project - Duncan Sutherland, where he presents the latest project progress. The talk was given at one of ODIN's (the Open Discovery Innovation Network) Knowledge Sharing Events in November 2022.
description: ODIN is funded by the Novo Nordisk Foundation (grant number NNF20SA0061466)
Adventures of a tidally induced bar
Creators: name: Lokas, E. L.
name: Athanassoula, E.
name: Debattista, V. P.
name: Valluri, M.
name: del Pino, A.
name: Semczuk, M.
name: Gajda, G.
name: Kowalczyk, K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using N-body simulations, we study the properties of a bar induced in a dwarf galaxy as a result of tidal interaction with the Milky Way. The dwarf is initially composed of a disk embedded in a dark matter halo and we follow its evolution on a typical orbit for 10 Gyr. It undergoes an evolution typical of tidally stirred dwarf galaxies: it loses mass, the stellar component transforms from a disk to a spheroid and the rotation of the stars is partially replaced by random motions. A tidally induced bar forms at the first pericentre passage and survives until the end of the evolution. Fourier decomposition of the distribution of stars reveals that only even modes are significant and preserve a hierarchy so that the bar mode is always the strongest. They show a characteristic profile with a maximum, similar to simulated bars forming in isolated galaxies and observed bars in real galaxies. We adopt the maximum of the bar mode as a measure of the bar strength and we estimate the bar length by comparing the density profiles along the bar and perpendicular to it. Both the bar strength and the bar length decrease with time, mainly at pericentres, as a result of tidal torques acting at those times and not to secular evolution. The pattern speed of the bar varies significantly on a time scale of 1 Gyr and seems to be fully controlled by the orientation of the tidal torque from the Milky Way. The bar is never tidally locked but we discover a hint of a 5/2 orbital resonance between the third and fourth pericentre passage. The speed of the bar expressed in terms of the ratio of the bar length to the corotation radius decreases in the long run so that the bar changes from initially rather fast to slow in the later stages. The boxy/peanut shape is clearly visible in the edge-on view between the second and third pericentre and its occurrence is preceded by a short period of buckling instability.
description: 13 pages, 12 figures, accepted for publication in MNRAS
The massive dirac equation in Kerr Geometry: Separability in Eddington-Finkelstein-type coordinates and asymptotics
Creators: name: Röken, Christian
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 510 Mathematik

description: The separability of the massive Dirac equation in a rotating Kerr black hole background in horizon-penetrating advanced Eddington-Finkelstein-type coordinates is shown. To this end, the Kerr spacetime is described in the framework of the Newman-Penrose formalism by a local Carter tetrad, and the Dirac wave functions are given on a spin bundle in a chiral Newman-Penrose dyad representation. Applying mode analysis techniques, the Dirac equation is separated into coupled systems of radial and angular ordinary differential equations. Asymptotic radial solutions at infinity and the event and Cauchy horizons are explicitly derived and, by means of error estimates, the decay properties are analyzed. Solutions of the angular ordinary differential equations matching the Chandrasekhar-Page equation are discussed. These solutions are used in order to study the scattering of Dirac waves by the gravitational field of a Kerr black hole. This work provides the basis for a Hamiltonian formulation of the massive Dirac equation in a Kerr background in horizon-penetrating coordinates, for the spectral theory of the corresponding Dirac Hamiltonian, and for the construction of an integral representation of the Dirac propagator.
Relative generalized Hamming weights of one-point algebraic geometric codes
Creators: name: Geil, Olav
name: Martin, Stefano
name: Matsumoto, Ryutaroh
name: Ruano, Diego
name: Luo, Yuan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Security of linear ramp secret sharing schemes can be characterized by the relative generalized Hamming weights of the involved codes. In this paper we elaborate on the implication of these parameters and we devise a method to estimate their value for general one-point algebraic geometric codes. As it is demonstrated, for Hermitian codes our bound is often tight. Furthermore, for these codes the relative generalized Hamming weights are often much larger than the corresponding generalized Hamming weights.
Evaluation of Pro-Inflammatory Cytokines Expression in Mouse Splenocyte Cells After Incubation with the Biofield Energy Based Herbomineral Formulation
Creators: name: Singh, Jagdish
Publisher: name: SMN - The ScienceMedia Network
Year: 2019
Subjects: Natural Sciences

description: The use of herbomineral formulations in the healthcare sector has increased due to their high safety and better therapeutic action. A new proprietary herbomineral formulation was formulated with a combination of the herbal root extract ashwagandha and minerals viz. zinc, magnesium, and selenium. The aim of the study was to evaluate the immunomodulatory potential of Biofield Energy Healing (The Trivedi Effect®) on the test formulation in splenocytes. The test formulation was divided into two parts; one was the control without the Biofield Energy Treatment, while the other part was defined as the Biofield Energy Treated sample, which received the Biofield Energy Healing Treatment remotely by seven renowned Biofield Energy Healers. The MTT assay showed that the test formulation exhibited safe concentrations up to 1.053 µg/mL with cell viability ranging from 88.19% to 110.30% in the Biofield Energy Treated sample. The Biofield Energy Healing significantly enhanced the cell viability as compared with the untreated test formulation. The expression of TNF-α was significantly inhibited by 7.23% at 1.053 µg/mL in the Biofield Energy Treated test formulation compared with the vehicle control. The level of TNF-α was significantly decreased by 3.90%, 11.74%, 3.12%, and 9.17% at 0.001053, 0.01053, 0.1053 and 1.053 µg/mL, respectively in the Biofield Energy Treated test formulation compared with the untreated test formulation. Additionally, the expression of IL-1β was significantly reduced by 28.98%, 51.23%, 53.06%, 48.98%, 55.71%, and 59.10% at 0.00001053, 0.0001053, 0.001053, 0.01053, 0.1053, and 1.053 µg/mL, respectively in the Biofield Energy Treated test formulation compared with the vehicle control. Further, the Biofield Treated test formulation showed significant reduction of IL-1β by 35.07% (p≤0.05), 47.46% (p≤0.05), and 57.51% (p≤0.01) at 0.001053, 0.1053, and 1.053 µg/mL, respectively compared with the untreated test formulation. Similarly, the MIP-1α expression was inhibited by the Biofield Energy Treated formulation and showed immunosuppressive activity at 0.00001053, 0.0001053, 0.001053, and 0.01053 µg/mL by 19.38%, 24.97%, 31.23%, and 25.41%, respectively compared with the vehicle control group. The Biofield Treated test formulation significantly (p0.001) reduced the MIP-1α expression by 19.33%, 22.57%, and 30.50% at 0.0001053, 0.001053, and 0.01053 µg/mL, respectively compared with the untreated test formulation. Overall, The Trivedi Effect® - Biofield Energy Healing (TEBEH) significantly down-regulated the pro-inflammatory cytokines and potentiated the immunosuppressive effect of the Biofield Energy Treated test formulation, which can be better utilized for organ transplants, autoimmune diseases, inflammatory disorders, anti-aging, stress management, overall health and quality of life, etc.
Nuclear parton distributions and the Drell-Yan process
Creators: name: Kulagin, S. A.
name: Petti, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the nuclear parton distribution functions on the basis of our recently developed semi-microscopic model, which takes into account a number of nuclear effects including nuclear shadowing, Fermi motion and nuclear binding, nuclear meson-exchange currents, and off-shell corrections to bound nucleon distributions. We discuss in detail the dependencies of nuclear effects on the type of parton distribution (nuclear sea vs valence), as well as on the parton flavor (isospin). We apply the resulting nuclear parton distributions to calculate ratios of cross sections for proton-induced Drell-Yan production off different nuclear targets. We obtain a good agreement on the magnitude, target and projectile $x$, and the dimuon mass dependence of proton-nucleus Drell-Yan process data from the E772 and E866 experiments at Fermilab. We also provide nuclear corrections for the Drell-Yan data from the E605 experiment.
description: 34 pages, 8 figures, 2 tables. Final version to appear in Phys. Rev. C
Effect of Biofield Energy Healing Based Herbomineral Formulation on Pro-inflammatory Cytokines Expression in Biofield Treated Mouse Splenocyte Cells
Creators: name: Singh, Jagdish
Publisher: name: SMN - The ScienceMedia Network
Year: 2019
Subjects: Natural Sciences

description: A proprietary herbomineral formulation was formulated with four ingredients; a mixture of the minerals (zinc, magnesium, and selenium) and the herbal root extract ashwagandha. The aim of the study was to evaluate the immunomodulatory potential of Biofield Energy Healing (The Trivedi Effect®) on the herbomineral formulation in splenocyte cells, which were isolated from Biofield Treated mice. The test formulation was divided into two parts. One part was denoted as the control without any Biofield Energy Treatment, while the other part was defined as the Biofield Energy Treated sample, which received the Biofield Energy Healing Treatment remotely from seven renowned Biofield Energy Healers. The splenocyte cells were treated with the test formulation at concentrations ranges from 0.00001053 to 10.53 µg/mL and analyzed after 48 hours of treatment by MTT assay. The cell viability data showed safe concentrations up to 1.053 µg/mL with viability ranges from 69.22% to 123.88% in the test formulation groups. The expression of TNF-α was decreased by 4.82% at 1.053 µg/mL in the Biofield Energy Treated test formulation compared with the vehicle control. The level of TNF-α was significantly decreased by 2.02%, 4.92%, and 18.78% at 0.00001053, 0.001053, and 1.053 µg/mL, respectively in the Biofield Energy Treated test formulation group as compared to the untreated test formulation. The expression of IL-1β was significantly reduced by 83.65%, 92.15%, 27.30%, and 41.88% at 0.00001053, 0.0001053, 0.001053, and 1.053 µg/mL, respectively in the Biofield Energy Treated test formulation compared with the vehicle control. The Biofield Treated test formulation showed significant reduction of IL-1β by 17.26%, 92.61% (p≤0.001), 34.62% (p≤0.05), and 16.13% at 0.00001053, 0.0001053, 0.001053, and 1.053 µg/mL, respectively compared with the untreated test formulation. Additionally, the expression of chemokine MIP-1α was significantly reduced by 17.03%, 10.99%, 22.33%, 24.21%, 21.61%, and 30.67% at 0.00001053, 0.0001053, 0.001053, 0.01053, 0.1053, and 1.053 µg/mL, respectively in the Biofield Treated test formulation compared with the vehicle control. The MIP-1α expression was significantly reduced by 19.32% and 12.56% at 0.01053 and 0.1053 µg/mL, respectively in the Biofield Treated test formulation compared with the untreated test formulation. The overall results demonstrated that the Biofield Energy Treated test formulation significantly down-regulated the expression of TNF-α, IL-1β, and MIP-1α in the Biofield Treated mice splenocyte cells compared to the untreated test formulation. These data suggest that the Biofield Treated test formulation can be used for autoimmune and inflammatory diseases, stress management and anti-aging by improving overall health.
Constraints on diffuse gamma-ray emission from structure formation processes in the Coma cluster
Creators: name: Zandanel, Fabio
name: Ando, Shin'ichiro
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We analyze 5-year (63 months) data of the Large Area Telescope on board Fermi satellite from the Coma galaxy cluster in the energy range between 100 MeV and 100 GeV. The likelihood analyses are performed with several templates motivated by models predicting gamma-ray emission due to structure formation processes. We find no excess emission and derive the most stringent constraints to date on the Coma cluster above 100 MeV, and on the tested scenarios in general. The upper limits on the integral flux range from 10^-10 to 10^-9 cm^-2s^-1, and are stringent enough to challenge different scenarios. We find that the acceleration efficiency of cosmic ray protons and electrons at shocks must be below approximately 15% and 1%, respectively. Additionally, we argue that the proton acceleration efficiency should be lower than 5% in order to be consistent with radio data. This, however, relays on magnetic field estimates in the cluster. In particular, this implies that the contribution to the diffuse extragalactic gamma-ray background due to gamma-rays from structure formation processes in clusters of galaxies is negligible, below 1%. Finally, we discuss future detectability prospects for Astro-H, Fermi after 10-yr of operation, and the Cherenkov Telescope Array.
description: 10 pages, 4 figures. Changed to match published version
Analysis of excited neutrinos at the CLIC
Creators: name: Köksal, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the single and pair production of excited neutrinos at the CLIC through the processes $e^{+}e^{-}\rightarrow ν^{*} \barν$, $e^{+}e^{-} \rightarrow e^{+}γ^{*} e^{-} \rightarrow e^{+} ν^{*} W^{-}$, and $e^{+}e^{-} \rightarrow e^{+}γ^{*} γ^{*} e^{-} \rightarrow e^{+} ν^{*} \barν^{*} e^{-}$ ($γ^{*}$ is the Weizsacker-Williams photon). We examine comprehensively the excited neutrino signal and corresponding backgrounds to obtain limits on excited neutrino mass for various values of the integrated luminosity and center-of-mass energy. We show that the obtained bounds are more restricted than current experimental bounds.
description: 23 pages, 13 figures, 3 Tables,to appear in Int. J. Mod. Phys. A
Well-posedness of a Cahn--Hilliard system modelling tumour growth with chemotaxis and active transport
Creators: name: Garcke, Harald
name: Lam, Kei Fong
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 510 Mathematik

description: We consider a diffuse interface model for tumour growth consisting of a Cahn--Hilliard equation with source terms coupled to a reaction-diffusion equation. The coupled system of partial differential equations models a tumour growing in the presence of a nutrient species and surrounded by healthy tissue. The model also takes into account transport mechanisms such as chemotaxis and active transport. We establish well-posedness results for the tumour model and a variant with a quasi-static nutrient. It will turn out that the presence of the source terms in the Cahn--Hilliard equation leads to new difficulties when one aims to derive a priori estimates. However, we are able to prove continuous dependence on initial and boundary data for the chemical potential and for the order parameter in strong norms.
Thermodynamic stability of asymptotically anti-de Sitter rotating black holes in higher dimensions
Creators: name: Dolan, Brian P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Conditions for thermodynamic stability of asymptotically anti-de Sitter rotating black holes in D-dimensions are determined. Local thermodynamic stability requires not only positivity conditions on the specific heat and the moment of inertia tensor but it is also necessary that the adiabatic compressibility be positive. It is shown that, in the absence of a cosmological constant, neither rotation nor charge is sufficient to ensure full local thermodynamic stability of a black hole. Thermodynamic stability properties of anti-de Sitter Myers-Perry black holes are investigated for both singly spinning and multi-spinning black holes. Simple expressions are obtained for the specific heat and moment of inertia tensor in any dimension. An analytic expression is obtained for the boundary of the region of parameter space in which such space-times are thermodynamically stable.
description: 30 pages, 3 figures. References added, minor typos corrected in v3
A spectral representation for spin-weighted spheroidal wave operators with complex aspherical parameter
Creators: name: Finster, Felix
name: Smoller, Joel
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 510 Mathematik

description: A family of spectral decompositions of the spin-weighted spheroidal wave operator is constructed for complex aspherical parameters with bounded imaginary part. As the operator is not symmetric, its spectrum is complex and Jordan chains may appear. We prove uniform upper bounds for the length of the Jordan chains and the norms of the idempotent operators mapping onto the invariant subspaces. The completeness of the spectral decomposition is proven.
Self-adjointness of the Dirac Hamiltonian for a class of non-uniformly elliptic boundary value problems
Creators: name: Finster, Felix
name: Röken, Christian
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 510 Mathematik

description: We consider a boundary value problem for the Dirac equation in a four-dimensional, smooth, asymptotically flat Lorentzian manifold admitting a Killing field which is timelike near and tangential to the boundary. A self-adjoint extension of the Dirac Hamiltonian is constructed. Our results also apply to the situation that the space-time includes horizons, where the Hamiltonian fails to be elliptic.
Teleparallel equivalent of Gauss-Bonnet gravity and its modifications
Creators: name: Kofinas, Georgios
name: Saridakis, Emmanuel N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Inspired by the teleparallel formulation of General Relativity, whose Lagrangian is the torsion invariant T, we have constructed the teleparallel equivalent of Gauss-Bonnet gravity in arbitrary dimensions. Without imposing the Weitzenbock connection, we have extracted the torsion invariant T_G, equivalent (up to boundary terms) to the Gauss-Bonnet term G. T_G is constructed by the vielbein and the connection, it contains quartic powers of the torsion tensor, it is diffeomorphism and Lorentz invariant, and in four dimensions it reduces to a topological invariant as expected. Imposing the Weitzenbock connection, T_G depends only on the vielbein, and this allows us to consider a novel class of modified gravity theories based on F(T,T_G), which is not spanned by the class of F(T) theories, nor by the F(R,G) class of curvature modified gravity. Finally, varying the action we extract the equations of motion for F(T,T_G) gravity.
description: 10 pages, version to appear in Phys.Rev.D. The general equations of motion have been derived, the cosmological applications are moved to a separate publication