cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dyonic Non-Abelian Vortices
Creators: name: Collie, Benjamin
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study three-dimensional Yang-Mills-Higgs theories with and without a Chern-Simons interaction. We find that these theories admit a rich spectrum of vortex solitons carrying both a topological charge and a global flavour charge. We further derive a low-energy description of the vortex dynamics from a gauged linear sigma model on the vortex worldline.
description: 16 pages, 3 figures; references added in section 2
Holomorphic Functions and polynomial ideals on Banach spaces
Creators: name: Carando, Daniel
name: Dimant, Verónica
name: Muro, Santiago
Publisher: name: arXiv
Year: 2009
Subjects: subject: Functional Analysis (math.FA)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 47H60, 46G20, 30H05, 46M05

description: Given $\u$ a multiplicative sequence of polynomial ideals, we consider the associated algebra of holomorphic functions of bounded type, $H_{b\u}(E)$. We prove that, under very natural conditions verified by many usual classes of polynomials, the spectrum $M_{b\u}(E)$ of this algebra "behaves" like the classical case of $M_{b}(E)$ (the spectrum of $H_b(E)$, the algebra of bounded type holomorphic functions). More precisely, we prove that $M_{b\u}(E)$ can be endowed with a structure of Riemann domain over $E"$ and that the extension of each $f\in H_{b\u}(E)$ to the spectrum is an $\u$-holomorphic function of bounded type in each connected component. We also prove a Banach-Stone type theorem for these algebras.
description: 19 pages
Causal relativistic hydrodynamics for viscous fluids
Creators: name: Heinz, Ulrich W
name: Song, Huichao
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We report on recent results from VISH2+1, a code that solves the relativistic Israel-Stewart equations for causal viscous hydrodynamics for heavy-ion collisions with longitudinal boost invariance. We find that even ``minimal'' shear viscosity eta/s=hbar/(4pi) leads to a large reduction of elliptic flow compared to ideal fluid dynamics. We explore systematically the sensitivity of this reduction to the equation of state, system size, initial conditions, and the microscopic relaxation time in different formulations of the Israel-Stewart equations.
description: 4 pages, 1 figure. Contribution to the Proceedings for Quark Matter 2008, Jaipur, India, Feb. 3-10, 2008, to appear in a special issue of J. Phys. G. Version 2: CERN preprint number corrected and Fig. 1 (right panel) recalculated using full Israel-Stewart equations (see text)
МОРФЕМНЫЙ И СЛОВООБРАЗОВАТЕЛЬНЫЙ РАЗБОР СЛОВА
Creators: name: Рустамов, Рахматулло
name: Кахарова, Нилуфар
Publisher: name: Zenodo
Year: 2023

description: В данной статье автор рассматривает особенности морфемного и словообразовательного анализа. Автор ставит перед собой цель, которая заключается в улучшении морфемных и словообразовательных навыков, в развитие у учащихся правописания, а также развитие практических навыков словообразования и анализа структуры слов. В статье отражены особенности словообразовательного гнезда как учебной единицы, используемой на занятиях по русскому языку.
Tree Level Metastability and Gauge Mediation in Baryon Deformed SQCD
Creators: name: Barnard, James
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate supersymmetric QCD with gauge group SU(2) and a baryon deformation to the superpotential. The existence of an uplifted vacuum at the origin with tree level metastability is demonstrated. When this model is implemented in a direct gauge mediation scenario we therefore find gaugino masses which are comparable to sfermion masses and parameterised by an effective number of messengers 1/8. All deformations are well motivated by appealing to the electric theory and an R-symmetry. This R-symmetry is explicitly broken by the same term responsible for supersymmetry breaking. Moreover, the model does not suffer from the Landau pole problem and we find that it can be described in terms of just two scales: the weak scale and a high scale like the Planck or GUT scale. The model can be tested by searching for new particles at the TeV scale charged under the visible sector gauge group.
description: 17 pages, 7 figures, updated references
Logic and existence
Creators: name: Skosnik, Jeffrey Paul
Publisher: name: University of British Columbia
Year: 2010

description: This thesis is a logical/historical inquiry into the concept of being. Relative to this concept, there are (I contend) two great traditions in Western philosophy. According to the one, the predicational use of the verb 'to be' is not independent of its existential use; according to the other, it is. That is to say, the first tradition assumes that 'a is F' entails 'a exists', while the other tradition denies this entailment. There are prima facie problems in both traditions, and the thesis attempts to resolve those arising on the assumption that the entailment holds. The thesis does not assume that either tradition as such is wrong. It is rather maintained that we may adopt either forms of language in which the predicational use of 'to be' is not independent of its existential use, or else forms of language in which the two uses are independent. When we make the first move, the result is a Fregean style of quantification theory in which existential generalization holds as an unconditionally valid form of inference; when we make the second move, the result is a free logic such as we find in the systems of Lambert and van Fraassen. Though I do not attempt to discredit either tradition as a whole, I do criticize specific claims made by the adherents of both traditions. On the whole, however, I am far more critical of those in the tradition to which the free logicians belong than I am of those in the tradition to which Frege belongs. The thesis attempts to show that in Frege's quantification theory we have a satisfactory explication of our concept of existence. The thesis offers some reasons for thinking that in the alternative tradition of the free logicians no such explication has yet emerged. The thesis concludes with a brief account of modality in which it is not assumed that individuals can possess characteristics independently of their existence.
The CMB, preferred reference system and dragging of light in the earth frame
Creators: name: Consoli, M.
name: Pluchino, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The dominant CMB dipole anisotropy is a Doppler effect due to a particular motion of the solar system with velocity of 370 km/s. Since this derives from peculiar motions and local inhomogeneities, one could meaningfully consider a fundamental frame of rest $Σ$ associated with the Universe as a whole. From the group properties of Lorentz transformations, two observers, individually moving within $Σ$, would still be connected by the relativistic composition rules. But ultimate implications could be substantial. Physical interpretation is thus traditionally demanded to correlating some dragging of light observed in laboratory with the direct CMB observations. Today the small residuals, from Michelson-Morley to present experiments with optical resonators, are just considered instrumental artifacts. However, if the velocity of light in the interferometers is not the same parameter "c" of Lorentz transformations, nothing would prevent a non-zero dragging. Furthermore, observable effects would be much smaller than classically expected and most likely of irregular nature. We review an alternative reading of experiments which leads to remarkable correlations with the CMB observations. Notably, we explain the irregular $10^{-15}$ fractional frequency shift presently measured with optical resonators operating in vacuum and solid dielectrics. For integration times of about 1 second, and typical Central-Europe latitude, we also predict daily variations of the Allan variance in the range $(5\div12) \cdot 10^{-16}$.
description: 43 pages, 13 figures, 3 tables
Parametrically-stimulated recovery of a microwave signal using standing spin-wave modes of a magnetic film
Creators: name: Chumak, A. V.
name: Serga, A. A.
name: Melkov, G. A.
name: Tiberkevich, V.
name: Slavin, A. N.
name: Hillebrands, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The phenomenon of storage and parametrically-stimulated recovery of a microwave signal in a ferrite film has been studied both experimentally and theoretically. The microwave signal is stored in the form of standing spin-wave modes existing in the film due to its finite thickness. Signal recovery is performed by means of frequency-selective amplification of one of these standing modes by double- requency parametric pumping process. The time of recovery, as well as the duration and magnitude of the recovered signal, depend on the timing and amplitudes of both the input and pumping pulses. A mean-field theory of the recovery process based on the competitive interaction of the signal-induced standing spin-wave mode and thermal magnons with the parametric pumping field is developed and compared to the experimental data.
Opción Consultores National Survey: Uruguay July 2014
Creators: name: Opción Consultores, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: 2014 general election; vote for or against parties; Colorado Party; National Party; Frente Amplio (a leftist political coalition); Independent Party; government priorities; housing; lowering taxes; security/crime; health care; poverty; wealth redistribution; education; labor conditions; likeability of political leaders; Luis Lacalle Pou (National Party); Pedro Bordaberry (Colorado Party); Tabaré Vázquez (Frente Amplio); party primaries; Constanza Moreira (Frente Amplio); Jorge Larrañaga (National Party); José Amorín Batlle (Colorado Party); Pablo Mieres (Independent Party); 2009 general election; José Mujica (Frente Amplio). Montevideo: 2015 municipal election; vote for or against parties; Colorado Party; National Party; Frente Amplio (a leftist political coalition); Independent Party; Partido de la Concertación (National and Colorado Parties running under a unified platform). National Agency for Research and Innovation (ANII) Collection.
Megastylus mihajlovici KOLAROV & GLAVENDEKIC 1992
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Megastylus
Megastylus mihajlovici

description: Megastylus mihajlovici KOLAROV & GLAVENDEKIC, 1992
M a t e r i a l e x a m i n e d: Trap 7: 1♀ 15-29.vi., 1♀ 19.x.-3.xi.
D i s t r i b u t i o n: Western Palaearctic, known from Georgia (RIEDEL & JAPOSHVILI 2021).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 117, DOI: 10.5281/zenodo.10415120
Scaling limits of random skew plane partitions with arbitrarily sloped back walls
Creators: name: Mkrtchyan, Sevak
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82B05, 82B20, 60C05

description: The paper studies scaling limits of random skew plane partitions confined to a box when the inner shapes converge uniformly to a piecewise linear function V of arbitrary slopes in [-1,1]. It is shown that the correlation kernels in the bulk are given by the incomplete Beta kernel, as expected. As a consequence it is established that the local correlation functions in the scaling limit do not depend on the particular sequence of discrete inner shapes that converge to V. A detailed analysis of the correlation kernels at the top of the limit shape and of the frozen boundary is given. It is shown that depending on the slope of the linear section of the back wall, the system exhibits behavior observed in either [OR2] or [BMRT].
description: 29 pages. Version 2: Several sections and proofs were improved and completely rewritten. These include Sections 2.2.2,2.2.4 and 2.2.5, Lemmas 2.3 and 4.2, and Proposition 4.1. Section 1.1.3 was added. This version is to be published in Comm. Math. Phys
Higher Order Corrections to the Cross Section of e+e- to Quarkonium plus gamma
Creators: name: Sang, Wen-Long
name: Chen, Yu-Qi
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The production cross sections of $e^+e^- $ to a heavy quarkonium with $C$-parity even $S-$wave and $P-$wave associated with a photon are analyzed in the framework of non-relativistic Quantum Chromodynamics(NRQCD) factorization formalism. The short-distance coefficients are determined up to the next-to-leading order(NLO) QCD radiative corrections for $S-$ and $P-$wave and NLO relativistic corrections for $S-$wave in analytical forms. Applying the results to estimate the cross sections we find that both the radiative and relativistic corrections are considerable.
description: 26 pages, 2 figures, 2 tables, one reference added. To be published in PRD
The formation of planetary disks and winds: an ultraviolet view
Creators: name: de Castro, Ana I. Gomez
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Planetary systems are angular momentum reservoirs generated during star formation. This accretion process produces very powerful engines able to drive the optical jets and the molecular outflows. A fraction of the engine energy is released into heating thus the temperature of the engine ranges from the 3000K of the inner disk material to the 10MK in the areas where magnetic reconnection occurs. There are important unsolved problems concerning the nature of the engine, its evolution and the impact of the engine in the chemical evolution of the inner disk. Of special relevance is the understanding of the shear layer between the stellar photosphere and the disk; this layer controls a significant fraction of the magnetic field building up and the subsequent dissipative processes ougth to be studied in the UV. This contribution focus on describing the connections between 1 Myr old suns and the Sun and the requirements for new UV instrumentation to address their evolution during this period. Two types of observations are shown to be needed: monitoring programmes and high resolution imaging down to, at least, milliarsecond scales.
description: Accepted for publication in Astrophysics and Space Science 9 figures
The vanishing of two-point functions for three-loop superstring scattering amplitudes
Creators: name: Grushevsky, Samuel
name: Manni, Riccardo Salvati
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper we show that the two-point function for the three-loop chiral superstring measure ansatz proposed by Cacciatori, Dalla Piazza, and van Geemen vanishes. Our proof uses the reformulation of ansatz in terms of even cosets, theta functions, and specifically the theory of the $Γ_{00}$ linear system on Jacobians introduced by van Geemen and van der Geer. At the two-loop level, where the amplitudes were computed by D'Hoker and Phong, we give a new proof of the vanishing of the two-point function (which was proven by them). We also discuss the possible approaches to proving the vanishing of the two-point function for the proposed ansatz in higher genera.
Natural Connection with Totally Skew-Symmetric Torsion on Riemannian Almost Product Manifolds
Creators: name: Mekerov, Dimitar
name: Manev, Mancho
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C05, 53C15, 53C25, 53B05, 22E60

description: On a Riemannian almost product manifold $(M,P,g)$ we consider a linear connection preserving the almost product structure $P$ and the Riemannian metric $g$ and having a totally skew-symmetric torsion. We determine the class of the manifolds $(M,P,g)$ admitting such a connection and prove that this connection is unique in terms of the covariant derivative of $P$ with respect to the Levi-Civita connection. We find a necessary and sufficient condition the curvature tensor of the considered connection to have similar properties like the ones of the Kähler tensor in Hermitian geometry. We pay attention to the case when the torsion of the connection is parallel. We consider this connection on a Riemannian almost product manifold $(G,P,g)$ constructed by a Lie group $G$.
description: 14 pages, a revised edition, an example is added
Galaxy Zoo: Passive Red Spirals
Creators: name: Masters, Karen L.
name: Mosleh, Moein
name: Romer, A. Kathy
name: Nichol, Robert C.
name: Bamford, Steven P.
name: Schawinski, Kevin
name: Lintott, Chris J.
name: Andreescu, Dan
name: Campbell, Heather C.
name: Crowcroft, Ben
name: Doyle, Isabelle
name: Edmondson, Edward M.
name: Murray, Phil
name: Raddick, M. Jordan
name: Slosar, Anze
name: Szalay, Alexander S.
name: Vandenberg, Jan
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the spectroscopic properties and environments of red spiral galaxies found by the Galaxy Zoo project. By carefully selecting face-on, disk dominated spirals we construct a sample of truly passive disks (not dust reddened, nor dominated by old stellar populations in a bulge). As such, our red spirals represent an interesting set of possible transition objects between normal blue spirals and red early types. We use SDSS data to investigate the physical processes which could have turned these objects red without disturbing their morphology. Red spirals prefer intermediate density regimes, however there are no obvious correlations between red spiral properties and environment - environment alone is not sufficient to determine if a spiral will become red. Red spirals are a small fraction of spirals at low masses, but are a significant fraction at large stellar masses - massive galaxies are red independent of morphology. We confirm that red spirals have older stellar popns and less recent star formation than the main spiral population. While the presence of spiral arms suggests that major star formation cannot have ceased long ago, we show that these are not recent post-starbursts, so star formation must have ceased gradually. Intriguingly, red spirals are ~4 times more likely than normal spirals to host optically identified Seyfert or LINER, with most of the difference coming from LINERs. We find a curiously large bar fraction in the red spirals suggesting that the cessation of star formation and bar instabilities are strongly correlated. We conclude by discussing the possible origins. We suggest they may represent the very oldest spiral galaxies which have already used up their reserves of gas - probably aided by strangulation, and perhaps bar instabilities moving material around in the disk.
description: MNRAS in press, 20 pages, 15 figures (v3)
ESE CONCEPT - Real Time EPA Enforcement for Agricultural Equipment
Creators: name: Loughlin, Shane
Publisher: name: Zenodo
Year: 2024
Subjects: ESE
Equipment Systems Engineering
EPA
AgTech
ESE Concept

description: Title: Real time control of Agricultural equipment to guarantee groundwater protection in Ireland.

 

Problem Statement

The EPA is responsible for monitoring and reporting air quality, water quality, soil, and other environmental factors. The EPA have repeatedly highlighted that intensive agricultural activities are impacting our groundwater, yet the sector must remain essentially unregulated because it is not yet possible to centrally monitor or control how agricultural equipment is operated. But we centrally monitor and control manufacturing equipment in the Life Science sector which is FDA regulated. Are these high TRL solutions transferrable to the EPA and the EU at large to help the regulator leverage digital technologies for real-time enforcement of best practice at the equipment layer? In essence, can we help the EPA and the AgTech sector to benefit from our Digital Transformation experiences in Life Science?

 

Goal: To explore if it is realistic for high TRL solutions in the FDA regulated Life Science sector, to be rapidly transferred to the EPA regulated Agricultural sector, for the protection of our groundwater.
Supplemental 1.docx
Creators: name: HaGani, Neta
name: Szintman, Sharon
name: Dor, Michael
name: Bar-Sela, Gil
name: Oren, Dana
name: Margolis-Dorfman, Lilia
name: Goor-Aryeh, Itay
name: Green, Manfred S.
Publisher: name: figshare
Year: 2021
Subjects: subject: 111709 Health Care Administration
subject: FOS: Health sciences
subject: 111799 Public Health and Health Services not elsewhere classified

description: Survey questionnaire for the study Attitudes Towards the Use of Medical Cannabis and the Perceived Efficacy, Side-effects and Risks: A Survey of Patients, Nurses and Physicians.School of public health, University of Haifa.
CIFRA National Survey: Uruguay July 1997
Creators: name: CIFRA, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Total population: potential deepwater port in Paloma (seaside town in Uruguay); approval of various political figures and groups; how you receive the news; interest in politics; political party candidate election; rate kindness of political leaders; daily water intake; plastic containers; Uruguayan pride; your childhood vs. your children’s childhood; homosexuality; rate confidence in political figures; dedication to religion; 1994 voting history; 1999 (next) election voting preferences. Montevideo: where do you go when you need a doctor; monthly medical fees payment; mutualista (hospital plan); medical specialists. National Agency for Research and Innovation (ANII) Collection.
Effect of immunization through vaccination on the SIS epidemic spreading model
Creators: name: Tomé, Tânia
name: de Oliveira, Mário J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We analyze the susceptible-infected-susceptible model for epidemic spreading in which a fraction of the individuals become immune by vaccination. This process is understood as a dilution by vaccination, which decreases the fraction of the susceptible individuals. For a nonzero fraction of vaccinated individuals, the model predicts a new state in which the disease spreads but eventually becomes extinct. The new state emerges when the fraction of vaccinated individuals is greater than a critical value. The model predicts that this critical value increases as one increases the infection rate reaching an asymptotic value, which is strictly less than the unity. Above this asymptotic value, the extinction occurs no matter how large the infection rate is.
D4.1– Characterization of nanosheets, networks and heterostacks built from initially available 2D materials
Creators: name: Backes, Claudia
name: Coleman, Jonathan
Publisher: name: Zenodo
Year: 2024

description: The report outlines the progress made regarding the characterisation of initially available 2D materials, as well as their printed networks and heterostacks. While an abundance of layered materials have been theoretically predicted to exist, only a fraction of them has been successfully exfoliated and characterised. Upon exfoliation, it is crucial to assess if the predicted physicochemical properties of the produced nanosheets have been preserved and are retained in solution for further processing. Furthermore, the development of characterisation techniques to quantify the morphological properties of solution-processed networks made from 2D materials will be crucial for device applications. This is an area of intensive research and forms the basis of the work described in this report.

We first will present the characterisation results on liquid phase exfoliated (LPE) and electrochemically exfoliated (EE) nanosheets, such as MoS2, AsSbS3, As2S3, SnGe, InSe, Mo0.5W0.5Se2, and HfSe3. Using atomic force microscopy (AFM), it was determined that the aspect ratio (AR) of EE nanosheets can reach values > 103, which is nearly 30 times larger than those obtained by the LPE method (AR ~ 10 - 30). Further characterisation by UV-Vis and Raman spectroscopy was used to investigate the intrinsic properties of the produced nanosheets. For EE MoS2, we began to explore whether information on dimensions or doping is potentially accessible from extinction spectroscopy.

The Langmuir-Schaefer (LS) method is believed to be an ideal method to fabricate ultra-thin and uniform nanosheet networks. However, the morphology of such networks is difficult to measure quantitatively due to the length-scales involved, and information on technique optimisation has been limited. To address this, we have used AFM to characterise these networks and have developed a layer-by-layer fabrication protocol with precisely controlled layer thicknesses. Work to tailor the thin-film morphology by tuning the deposition parameters has also been performed. We show that spatial variations in the network morphology can be assessed using optical transmission scanning measurements. Finally, we have applied the focused ion beam – scanning electron microscopy nanotomography (FIB-SEM-NT) technique to reconstruct both 2D networks and heterostacks in 3D with unprecedented resolution. This allowed the internal structure of nanosheet films deposited under different conditions and using different nanosheet types to be characterised.
Spectro-microscopy of single and multi-layer graphene supported by a weakly interacting substrate
Creators: name: Knox, Kevin R.
name: Wang, Shancai
name: Morgante, Alberto
name: Cvetko, Dean
name: Locatelli, Andrea
name: Mentes, Tevfik Onur
name: Niño, Miguel Angel
name: Kim, Philip
name: Osgood, R. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report measurements of the electronic structure and surface morphology of exfoliated graphene on an insulating substrate using angle-resolved photoemission and low energy electron diffraction. Our results show that although exfoliated graphene is microscopically corrugated, the valence band retains a massless fermionic dispersion, with a Fermi velocity of ~10^6 m/s. We observe a close relationship between the morphology and electronic structure, which suggests that controlling the interaction between graphene and the supporting substrate is essential for graphene device applications.
description: 10 pages of text, 4 JPEG figures
Discrepancies of non-$\Q$-Gorenstein varieties
Creators: name: Urbinati, Stefano
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 14J17, 14F18, 14Q15

description: We give an example of a non $\Q$-Gorenstein variety which is canonical but not klt, and whose canonical divisor has an irrational valuation. We also give an example of an irrational jumping number and we prove that there are no accumulation points for the jumping numbers of normal non-$\Q$-Gorenstein varieties with isolated singularities.
description: 12 pages - minor changes
Megastylus orbitator SCHIODTE 1838
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Megastylus
Megastylus orbitator

description: Megastylus orbitator SCHIØDTE, 1838
M a t e r i a l e x a m i n e d: Trap 2: 1♀ 20.iv.-5.v., 3♀♀ 1♁ 1-15.vi.; trap 4: 1♀ 1-15.vi.
D i s t r i b u t i o n: Holarctic, known from Georgia (RIEDEL & JAPOSHVILI 2021).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 117, DOI: 10.5281/zenodo.10415120
Dynamical Correlations of the Spin-1/2 Heisenberg XXZ Chain in a Staggered Field
Creators: name: Kuzmenko, Igor
name: Essler, Fabian H. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider the easy-plane anisotropic spin-1/2 Heisenberg chain in combined uniform longitudinal and transverse staggered magnetic fields. The low-energy limit of his model is described by the sine-Gordon quantum field theory. Using methods of integrable quantum field theory we determine the various components of the dynamical structure factor. To do so, we derive explicit expressions for all matrix elements of the low-energy projections of the spin operators involving at most two particles. We discuss applications of our results to experiments on one-dimensional quantum magnets.
description: 19 pages, 11 eps-figures; added references
Cold Atmospheric Plasma Sterilization of FFP3 Face Masks and Long-Term Material Effects
Creators: name: Schmidt, Alisa
name: Tschang, Chen-Yon Tobias
name: Sann, Joachim
name: Thoma, Markus H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: The use of cold atmospheric plasmas (CAP) to sterilize sensitive surfaces is an interesting new field of applied plasma physics. Motivated by the shortages of face masks and safety clothing at the beginning of the corona pandemic, we conducted studies on the sterilization of FF3 face masks with CAP and the resulting material effects. Therefore, the bactericidal and sporicidal efficacy of CAP afterglow sterilization of FFP3 mask material was investigated by inoculating fabric samples with test germs Escherichia coli (E. coli) and Bacillus atrophaeus (B. atrophaeus) and subsequent CAP afterglow treatment in a surface-micro-discharge (SMD) plasma device. In addition, a detailed analysis of the changes in long-term plasma treated (15h) mask material and its individual components - ethylene vinyl acetate (EVA) and polypropylene (PP) - was carried out using surface analysis methods such as laser microscopy, contact angle measurements, X-ray photoelectron spectroscopy (XPS) as well as fabric permeability and resistance measurements. The experiments showed that E. coli and B. atrophaeus could both be effectively inactivated by plasma treatment in nitrogen mode (12 kVpp, 5 kHz). For B. atrophaeus inactivation of more than 4-log was achieved after 30 minutes. E. coli population could be reduced by 5-log within one minute of CAP treatment and after five minutes a complete inactivation (> 6-log) was achieved. Material analysis showed that long-term (> 5 h) plasma treatment affects the electrostatic properties of the fabric. From this it can be deduced that the plasma treatment of FFP3 face masks with the CAP afterglow of an SMD device effectively inactivates microorganisms on the fabric. FFP3 masks can be plasma decontaminated and reused multiple times but only to a limited extent, as otherwise the permeability levels no longer meet the DIN EN 149 specifications.
description: 15 pages, 9 Figures
Off-diagonal correlations in a one-dimensional gas of dipolar bosons
Creators: name: Roscilde, Tommaso
name: Boninsegni, Massimo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We present a quantum Monte Carlo study of the one-body density matrix (OBDM) and the momentum distribution of one-dimensional dipolar bosons, with dipole moments polarized perpendicular to the direction of confinement. We observe that the long-range nature of the dipole interaction has dramatic effects on the off-diagonal correlations: although the dipoles never crystallize, the system goes from a quasi-condensate regime at low interactions to a regime in which quasi-condensation is discarded, in favor of quasi-solidity. For all strengths of the dipolar interaction, the OBDM shows an oscillatory behavior coexisting with an overall algebraic decay; and the momentum distribution shows sharp kinks at the wavevectors of the oscillations, $Q = \pm 2πn$ (where $n$ is the atom density), beyond which it is strongly suppressed. This \emph{momentum filtering} effect introduces a characteristic scale in the momentum distribution, which can be arbitrarily squeezed by lowering the atom density. This shows that one-dimensional dipolar Bose gases, realized e.g. by trapped dipolar molecules, show strong signatures of the dipolar interaction in time-of-flight measurements.
description: 10 pages, 6 figures. v2: fixed a mistake in the comparison with Ref. 9, as well as several typos. Published version
A Model of Lepton Masses from a Warped Extra Dimension
Creators: name: Csaki, C.
name: Delaunay, C.
name: Grojean, C.
name: Grossman, Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In order to explain the non-hierarchical neutrino mixing angles and the absence of lepton flavor violating processes in the context of warped extra dimensions one needs to introduce bulk flavor symmetries. We present a simple model of lepton masses and mixings in RS models based on the A4 non-abelian discrete symmetry. The virtues of this choice are: (i) the natural appearance of the tri-bimaximal mixing pattern; (ii) the complete absence of tree-level flavor violations in the neutral sector; (iii) the absence of flavor gauge bosons; (iv) the hierarchies in the charged lepton masses are explained via wave-function overlaps. We present the minimal field content and symmetry breaking pattern necessary to obtain a successful model of this type. The bounds from electroweak precision measurements allow the KK mass scale to be as low as 3 TeV. Tree-level lepton flavor violation is absent in this model, while the loop induced mu -> e gamma branching fraction is safely below the experimental bound.
Black Holes and Non-perturbative Gravitational Waves in $f(R)$ Gravity
Creators: name: Liu, Chunmei
name: Zhang, Hongsheng
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Exact solutions of spherically symmetric black hole and gravitational wave are explored in $f(R)$ gravity in arbitrary dimension. We find two exact solutions for the radiation and absorption of null dust. In the framework of general relativity, the Birkhoff theorem strictly forbids the existence of spherical gravitational waves in vacuum space. We find spherical non-perturbative gravitational waves, which are shear-free, twist-free, but expanding.
description: 13 pages
Quantitative polarimetry of the disk around HD 169142
Creators: name: Tschudi, C.
name: Schmid, H. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We investigate high resolution imaging polarimetry of HD 169142 taken in the R' and I' bands with the SPHERE/ZIMPOL instrument for an accurate quantitative measurement of the radiation scattered by the circumstellar disk. We observe a strong dependence of the disk polarimetry on the atmospheric turbulences, which strongly impact the AO performance. With our non-coronagraphic data we can analyze the polarimetric signal of the disk simultaneously with the strongly variable stellar PSF, correct for the convolution effects to determine the intrinsic polarization of the disk with high precision. We also extract the disk intensity signal and derive the fractional polarization. We compare the scattered flux from the inner and outer disk rings with the corresponding thermal dust emissions measured in the IR and estimate the ratio between scattered and absorbed radiation. We obtain ratios between the integrated disk polarization flux and total system flux of 0.43% for the R' band and 0.55% for the I' band. This indicates a reddish color for the light reflection by the dust. The inner disk ring contributes about 75% to the total disk flux. The obtained fractional polarization for the bright inner disk ring is 23.6% for the I' band and similar for the R' band. The ratio between scattered disk flux and star flux is about 2.3%. This is much smaller than the derived IR excess of 17.6% for the disk components observed in scattered light. This indicates that only a small fraction of the radiation illuminating the disk is scattered; most is absorbed and reemitted in the IR. We conclude that accurate, quantitative measurements of the scattered light from circumstellar disks are possible with ground based high contrast AO systems, if the PSF convolution effects are properly taken into account, and this provides important new constraints on the properties of the scattering dust.
description: 21 pages, 15 figures, accepted for publication in A&A
A vapor cell based on dispensers for laser spectroscopy
Creators: name: Bridge, E. M.
name: Millen, J.
name: Adams, C. S.
name: Jones, M. P. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We describe a simple strontium vapor cell for laser spectroscopy experiments. Strontium vapor is produced using an electrically heated commercial dispenser source. The sealed cell operates at room temperature, and without a buffer gas or vacuum pump. The cell was characterised using laser spectroscopy, and was found to offer stable and robust operation, with an estimated lifetime of >10,000 hours. By changing the dispenser, this technique can be readily extended to other alkali and alkaline earth elements.
description: 8 pages, 3 figures
The influence of temperature and salinity on the cuticular permeability of some Corixidae
Creators: name: Cannings, Sydney Graham
Publisher: name: University of British Columbia
Year: 2010

description: Most terrestrial, and many aquatic insects are made waterproof by a layer of lipid in or on the epicuticle. At a specific temperature, which is determined by their composition, these lipids undergo a phase transition which markedly increases the permeability of the integument. The major purpose of this study was to assess the possibility that epicuticular wax transition could differentially affect the distribution of four species of water boatmen: Cenocorixa bifida hungerfordi Lansbury, Cenocorixa expleta (Uhler), Cenocorixa blaisdelli. (Hunger-ford , and Callicorixa vulnerata (Uhler). The rates of water loss and cuticle temperatures of adult corixids were measured in a stream of dry carbon dioxide in steps of increasing temperature. The temperatures at which transition occurred in these species were all approximately the same. Although they ranged from 30.3 to 32.6 C there were no major differences between the two genera, among congeners with different distributions, or between two coexisting congeners. This was true, however, only for corixids which had been acclimated to the same temperature: a positive correlation between transition temperature and acclimation temperature was demonstrated in C. befida. Both the short-term and long-term effects of transition on these insects were examined. Immersion of live C. bifida adults in water warmer than their transition temperature did not appear to cause any irreversible changes in cuticular permeability. Survival tests at various temperatures showed that the survival time of C. bifida adults decreased with increased temperature. However, insects placed in warm water did not show any outward signs of osmoregulatory failure or loss of surface wax as a result of transition. In addition, C. bifida placed in water as warm as or several degrees warmer than their transition temperature survived much longer than the length of time that these insects would .be exposed to these temperatures in the field. The present study on transition effects suggests that the transition of epicuticular lipids does not affect the distribution of these corixids in the field. However, it appears that salinity has a pronounced effect on the permeability of C. bifida adults. Individuals from fresh water habitats and highly saline ponds exhibited roughly equal cuticular permeability, but those from lakes of intermediate salinities were up to twice as permeable. This phenomenon was shown to be one of physiological acclimation, since individuals placed into distilled water showed a significant decrease in permeability after five days. It is possible that this influence of salinity on cuticular permeability may affect the relative dispersal success of the corixids which inhabit inland saline lakes.
Combined high field and benchtop NMR studies of catalyst separation techniques on proton exchange membranes
Creators: name: Jovanovic, Sven
name: Rameker, Robert
name: Plüm, Maik
name: Schmid, Günter
name: Eichel, Rüdiger-A.
name: Granwehr, Josef
Publisher: name: Forschungzentrum Jülich
Year: 2024

description: FGMR Annual Discussion Meeting 2024, Rostock, Germany, 9 Sep 2024 - 12 Sep 2024
description: Proton exchange membrane (PEM) electrolysis is a promising technology for the large-scale production of green hydrogen using energy from renewable sources. PEMs are commonly based on perfluoroalkane sulfonic acid ionomers, i.e. polymers composed of a hydrophobic PTFE backbone and hydrophilic side chain with a sulfonic acid function. While PEM electrolyzers can be operated at high current densities and efficiencies, their industrial implementation is hindered by the high cost of the components, where catalysts and the PEM contribute a significant share. In addition, a PFAS ban is currently discussed by various governments. Thus, the PEM and catalysts must be used efficiently, and recycling of the materials at the end of their lifetime is incentivized. Current protocols for separation of the membrane-electrode-assembly (MEA) into PEM and catayst often involve isopropanol/water mixtures in combination with mechanical treatment [1]. However, the effect of the technique on the PEM properties has yet to be discussed in detail, as the incentive of separation was initially focused on the precious metal catalysts.This work presents two pathways for studying PEM materials by these separation techniques: First, a high field 19F MAS study focused on the structure and chemical composition of the ionomer, and second, a 1H benchtop NMR investigation utilizing proton diffusivity and relaxation experiments for assessment of the PEM. After separation treatment of the PEM, the 19F study revealed a significant loss of polar side chains in the ionomer in addition to less restricted polymer chain motions. These chemical and structural alterations suggest a loss of order in the ionomer structure, which is in line with the increased swelling behavior of the PEM after separation treatment. 1H PFG and relaxation studies support this conclusion, as both short- and long-range proton mobility increased significantly. Interestingly, the separation technique also led to the formation of two, non-exchanging proton diffusion regimes, indicating significant changes in the water transport behavior of the PEM. In conclusion, both high-field and low-field NMR studies contributed to new insights on the effect of membrane/catalyst separation techniques described in literature. While both methods are required for a comprehensive interpretation, 1H benchtop NMR proved capable as a low-cost and ease of use screening method.
Optimal bounds for sign-representing the intersection of two halfspaces by polynomials
Creators: name: Sherstov, Alexander A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: The threshold degree of a function f:{0,1}^n->{-1,+1} is the least degree of a real polynomial p with f(x)=sgn p(x). We prove that the intersection of two halfspaces on {0,1}^n has threshold degree Omega(n), which matches the trivial upper bound and completely answers a question due to Klivans (2002). The best previous lower bound was Omega(sqrt n). Our result shows that the intersection of two halfspaces on {0,1}^n only admits a trivial 2^{Theta(n)}-time learning algorithm based on sign-representation by polynomials, unlike the advances achieved in PAC learning DNF formulas and read-once Boolean formulas. The proof introduces a new technique of independent interest, based on Fourier analysis and matrix theory.
description: A few minor simplifications added
Orthocentrus asper GRAVENHORST 1829
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Orthocentrus
Orthocentrus asper

description: Orthocentrus asper GRAVENHORST, 1829
M a t e r i a l e x a m i n e d: Trap4: 1♀ 13-27.vii.; trap 7: 1♀ 19.x.-3.xi.; trap 15: 1♀ 16-30.vi.
D i s t r i b u t i o n: Holarctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 117, DOI: 10.5281/zenodo.10415120
The growth exponent for planar loop-erased random walk
Creators: name: Masson, Robert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G50; 60J65

description: We give a new proof of a result of Kenyon that the growth exponent for loop-erased random walks in two dimensions is 5/4. The proof uses the convergence of LERW to Schramm-Loewner evolution with parameter 2, and is valid for irreducible bounded symmetric random walks on any two-dimensional discrete lattice.
description: 62 pages, 7 figures; fixed typos, added references