cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Kernel of the Reciprocity Map of Simple Normal Crossing Varieties over Finite Fields
Creators: name: Forre, Patrick
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: higher dimensional class field theory, reciprocity map, abelianized fundamental group, Seifert–van Kampen theorem, simple normal crossing varieties over finite fields
subject: 510 Mathematik

description: For a smooth and proper variety Y over a finite field k the reciprocity map ρY:\CH0(Y)→π\ab1(Y) is injective with dense image. For a proper simple normal crossing variety this is no longer true in general. In this paper we give a discription of the kernel and cokernel of the reciprocity map in terms of homology groups of a complex filled with descent data using an algebraic Seifert-van-Kampen theorem. Furthermore, we give a new criterion for the injectivity of the reciprocity map for proper simple normal crossing varieties over finite fields.
Harmonic Galois theory for finite graphs
Creators: name: Corry, Scott
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 05C25 (Primary) 14H30, 11R32 (Secondary)

description: This paper develops a harmonic Galois theory for finite graphs, thereby classifying harmonic branched $G$-covers of a fixed base $X$ in terms of homomorphisms from a suitable fundamental group of $X$ together with $G$-inertia structures on $X$. As applications, we show that finite embedding problems for graphs have proper solutions and prove a Grunwald-Wang type result stating that an arbitrary collection of fibers may be realized by a global cover.
description: 15 pages; minor expository changes
Highly efficient thermally activated fluorescence of a new rigid Cu(I) complex [Cu(dmp)(phanephos)]+
Creators: name: Czerwieniec, Rafal
name: Kowalski, Konrad
name: Yersin, Hartmut
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 540 Chemie

description: The rigid [Cu(dmp)(phanephos)]+ complex displays a high luminescence quantum yield of 80% at ambient temperature. In contrast to the long-lived phosphorescence of 240 μs at T < 120 K with a radiative rate of kr = 3 × 103 s−1, the ambient-temperature emission represents a thermally activated delayed fluorescence (DF) with a decay time of only 14 μs and a radiative rate of kr(DF) = 6 × 104 s−1. Evidence for the involvement of the excited singlet state in the emission process is presented. This material has high potential to be applied in efficient OLEDs taking advantage of the singlet harvesting mechanism.
Effects of high-intensity interval exercise on vasodilator function in children
Creators: name: Sletten, Nathan Robert
Publisher: name: University of British Columbia
Year: 2017

description: Purpose: Exercise training can improve vascular function through anti-atherogenic effects on the vascular endothelium, a response which can be discerned following individual bouts of exercise. Although well characterized in adults, the effect of exercise intensity on the acute recovery patterns of vasodilator function is unknown in children. Study Design: Nine children (age = 10.5 ± 1.5 y, 6 girls) completed 1) high-intensity interval exercise (HIIE, six 1-minute sprints at 90% peak power (Wmax), with 1-minute recovery) and 2) moderate-intensity exercise (MIE, 15 minutes at 44% Wmax, total external work-matched to HIIE). Superficial femoral artery (SFA) diameter, blood flow, shear rates, and flow-mediated dilation (FMD) were measured before (Pre), immediately following (Post), and 60 minutes following (Post60) the exercise trials using duplex ultrasound. Results: Baseline diameter increased similarly following both HIIE (Pre 4.25 ± 0.42 mm, Post 4.76 ± 0.42 mm) and MIE (Pre 4.29 ± 0.49 mm, Post 4.62 ± 0.49 mm), returning to pre-exercise values 60 minutes later. Blood flow and antegrade shear rate were increased following HIIE and MIE, but to a greater extent after HIIE (P < 0.05). Retrograde shear rate was attenuated following both exercise conditions, remaining lower 60 minutes after exercise (P’s < 0.001). FMD was attenuated Post compared to Pre following HIIE (Δ -2.8%) and MIE (Δ -2.5%) (P’s < 0.05) and recovered to pre-exercise values with no difference between Post60 and Pre FMD. When FMD was corrected to account for changes in baseline diameter, there was no longer a significant main effect of time (P = 0.34) making the post-exercise nadir in FMD negligible. Conclusions: Acute bouts of external work-matched HIIE or MIE exert a similar impact on shear-mediated conduit artery vasodilation and FMD in children and this is reversible 60 minutes post-exercise. This suggests the mechanisms that govern the acute FMD response in adolescents and adults may be dissimilar in children.
Dirty hands: photodynamic killing of human pathogens like EHEC, MRSA and Candida within seconds
Creators: name: Eichner, Anja
name: Pereira Gonzales, Fernanda
name: Felgenträger, Ariane
name: Regensburger, Johannes
name: Holzmann, Thomas
name: Schneider-Brachert, Wulf
name: Bäumler, Wolfgang
name: Maisch, Tim
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 540 Chemie
subject: 610 Medizin

description: Hand hygiene is one of the most important interventions for reducing transmission of nosocomial life-threatening microorganisms, like methicillin resistant Staphylococcus aureus (MRSA), enterohemorrhagic Escherichia coli (EHEC) or Candida albicans. All three pathogens have become a leading cause of infections in hospitals. Especially EHEC is causing severe diarrhoea and, in a small percentage of cases, haemolytic-uremic syndrome (HUS) as reported for E. coli 104:H4 in Germany 2011. We revealed the possibility to inactivate very fast and efficiently MRSA, EHEC and C. albicans using the photodynamic approach. MRSA, EHEC and C. albicans were incubated in vitro with different concentrations of TMPyP for 10 s and illuminated with visible light (50 mW cm−2) for 10 and 60 s. 1 μmol l−1 of TMPyP and an applied radiant exposure of 0.5 J cm−2 achieved a photodynamic killing of ≥99.9% of MRSA and EHEC. Incubation with higher concentrations (up to 100 μmol l−1) of TMPyP caused bacteria killing of >5 log10 (≥99.999%) after illumination. Efficient Candida killing (≥99.999%) was achieved first at a higher light dose of 12 J cm−2. Different rise and decay times of singlet oxygen luminescence signals could be detected in Candida cell suspensions for the first time, indicating different oxygen concentrations in the surrounding for the photosensitizer and singlet oxygen, respectively. This confirms that TMPyP is not only found in the water-dominated cell surrounding, but also within the C. albicans cells. Applying a water–ethanol solution of TMPyP on ex vivo porcine skin, fluorescence microscopy of histology showed that the photosensitizer was exclusively localized in the stratum corneum regardless of the incubation time. TMPyP exhibited a fast and very effective killing rate of life-threatening pathogens within a couple of seconds that encourages further testing in an in vivo setting. Being fast and effective, antimicrobial photodynamic applications might become acceptable as a tool for hand hygiene procedures and also in other skin areas.
title: THE MAIN TRENDS OF DIGITALIZATION IN THE DEVELOPMENT  OF THE HEALTHCARE SECTOR IN RUSSIA
Creators: name: Guseva, Kseniya A.
name: Kosinova, Natal'ya N.
Publisher: name: Astrakhan State Medical University
Year: 2021

description: Abstract. Nowadays the state of Russian medicine is characterized by many problems that have accumulated over the past decades. These include insufficient funding, a low level of material and technical base, unsatisfactory quality of medical care, poor performance of the program of state guar-antees of medical care, the lack of modern equipment and information technologies in hospitals, and the lack of qualified managers in medical institutions. Each of these problems can pose a serious threat, both to the individual and to the national security of our country. Health management is focused on finding additional sources of funding. However, as practice shows, such sources of financing as social insurance, state support for vulnerable segments of the population and attracting funds from consumers of medical services do not have a significant impact on the efficiency of the industry. The solution to the accumulated problems in the field of medicine can be considered the intro-duction of the national project «Creating a unified digital circuit in healthcare based on a unified state information system in the field of healthcare» and at the same time the strategy for the development of healthcare in the Russian Federation for the period up to 2030. The article examines digitalization in the healthcare sector as a comprehensive study of positive and negative factors that can affect the modernization of the healthcare sector and the efficiency of economic development. Key words: health, healthcare, medical assistance, healthy lifestyle, innovations.
The variational Poisson cohomology
Creators: name: De Sole, Alberto
name: Kac, Victor G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37K10 (Primary) 37K30, 17B80 (Secondary) 37K10 (Primary) 37K30, 17B80 (Secondary) 37K10 (Primary) 37K30, 17B80 (Secondary)

description: It is well known that the validity of the so called Lenard-Magri scheme of integrability of a bi-Hamiltonian PDE can be established if one has some precise information on the corresponding 1st variational Poisson cohomology for one of the two Hamiltonian operators. In the first part of the paper we explain how to introduce various cohomology complexes, including Lie superalgebra and Poisson cohomology complexes, and basic and reduced Lie conformal algebra and Poisson vertex algebra cohomology complexes, by making use of the corresponding universal Lie superalebra or Lie conformal superalgebra. The most relevant are certain subcomplexes of the basic and reduced Poisson vertex algebra cohomology complexes, which we identify (non-canonically) with the generalized de Rham complex and the generalized variational complex. In the second part of the paper we compute the cohomology of the generalized de Rham complex, and, via a detailed study of the long exact sequence, we compute the cohomology of the generalized variational complex for any quasiconstant coefficient Hamiltonian operator with invertible leading coefficient. For the latter we use some differential linear algebra developed in the Appendix.
description: 130 pages, revised version with minor changes following the referee's suggestions
Carta Geologica Regione Toscana a scala 1:50.000, F. 332 - Scansano
Creators: name: Conti, Paolo
name: Cornamusini, Gianluca
Publisher: name: Zenodo
Year: 2021
Subjects: Geological Map, Geology, Northern Apennines, Tuscany, Italy

description: Carta Geologica a scala 1:50.000 realizzata della Regione Toscana - Università di Siena, Centro di Geotecnologie, Foglio 332- Scansano, 2010. Geological Map printed by the Regione Toscana, Italy, and compiled by the University of Siena, Center for Geotechnologies, 2010. Info: conti@unisi.it
On the functional limits for sums of a function of partial sums
Creators: name: Kosiński, Kamil Marcin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: G0F05 (Primary)

description: We derive a functional central limit theorem (fclt) for normalised sums of a function of the partial sums of independent and identically distributed random variables. In particular, we show, using a technique presented in Huang and Zhang (Electron. Comm. Probab. 12 (2007), 51--56), that the result from Qi (Statist. Probab. Lett. 62 (2003), 93--100), for normalised products of partial sums, can be generalised in this fashion to a fclt.
Implementation of EC-Earth 10km global coupled demonstrator and performance analysis (D2.11)
Creators: name: Serradell, Kim
name: Acosta, Mario
name: Castrillo, Miguel
Publisher: name: Zenodo
Year: 2019

description: Recent studies have established that the typical spatial resolutions used for the atmospheric and oceanic components included in the CMIP5 coordinated exercise (Coupled Model Intercomparison Project, phase 5), i.e around 100km-150km globally, are a limiting factor to correctly reproduce climate mean state and variability, where processes such as eddies, clouds, orography effects, small scale hydrology etc. are not represented correctly. The latest generation of models, under development or just starting to be used, have grid spacing in the 20-50 km range, and there is evidence that a number of important climate processes is better represented at this resolution (Prodhomme et al, 2016) (e.g. aqua planet, ENSO, satellite validation, blocking, tropical storm numbers, etc.). However, a higher resolution is already needed as very high-resolution global models are expected to improve our predictions and understanding of the effect of global warming on high impact weather events on seasonal, decadal and century timescales (Zhang et al, 2015). For this reason, BSC is developing a coupled version of the EC-Earth 3.2 climate model at a ground-breaking resolution of about 10 km (called T1279-ORCA12).

In the atmosphere, the horizontal domain is based on a spectral truncation of the atmospheric model (IFS) at T1279 (approx. 10 km globally, i.e. the highest resolution we can use with the standard IFS - higher resolutions would require e.g. nonhydrostatic parameterizations) together with 91 vertical levels. The ocean component (NEMO) is run on the so-called ORCA12 tripolar (cartesian) grid at a horizontal resolution of about 1/12° (approximately 6 to 9 km), with 75 vertical levels, whose thickness increases from 1m below surface up to 200m in the deep ocean.

In this deliverable, we will present the work done to develop this configuration during the whole project as well an analysis of the performance of T1279-ORCA12 on the MareNostrum 4 Supercomputer.
description: ESiWACE has received funding from the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement No 675191
UVA irradiation of fatty acids and their oxidized products substantially increases their ability to generate singlet oxygen
Creators: name: Regensburger, Johannes
name: Maisch, Tim
name: Knak, Alena
name: Gollmer, Anita
name: Felgenträger, Ariane
name: Lehner, Karin
name: Bäumler, Wolfgang
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 540 Chemie
subject: 610 Medizin

description: UVA radiation plays an important role for adverse reactions in human tissue. UVA penetrates epidermis and dermis of skin being absorbed by various biomolecules, especially endogenous photosensitizers. This may generate deleterious singlet oxygen (1O2) that oxidizes fatty acids in cell membranes, lipoproteins, and other lipid-containing structures such as the epidermal barrier. Indications exist that fatty acids are not only the target of 1O2 but also act as potential photosensitizers under UVA irradiation, if already oxidized. Five different fatty acids in ethanol solution (stearic, oleic, linoleic, linolenic and arachidonic acid) were exposed to UVA radiation (355 nm, 100 mW) for 30 seconds. 1O2 luminescence was detected time-resolved at 1270 nm and confirmed in spectrally-resolved experiments. The more double bonds fatty acids have the more 1O2 photons were detected. In addition, fatty acids were continuously exposed to broadband UVA for up to 240 min. During that time span, UVA absorption and 1O2 luminescence substantially increased with irradiation time, reached a maximum and decreased again. HPLC-MS analysis showed that the amount of peroxidized fatty acids and the 1O2 generation increased and decreased in parallel. This indicates the high potential of peroxidized fatty acids to produce 1O2 under UVA irradiation. In conclusion, fatty acids along with peroxidized products are weak endogenous photosensitizers but become strong photosensitizers under continuous UVA irradiation. Since fatty acids and their oxidized products are ubiquitous in living cells and in skin, which is frequently and long-lasting exposed to UVA radiation, this photosensitizing effect may contribute to initiation of deleterious photooxidative processes in tissue.
title: Informe Anual 2020 del Registro del Grupo de Estudio de la Enfermedad Poliquística Autosómica Dominante (GEEPAD)
title: Informe Anual GEEPAD 2020
titleType: Subtitle
Creators: name: Esteban-de-la-Rosa, Rafael-José
name: Bravo-Soto, Juan-Antonio
name: Morales-García, Ana-Isabel
Publisher: name: Zenodo
Year: 2020

description: El presente informe ha sido elaborado con los datos del Registro del GEEPAD en un corte realizado con fecha 15/11/2019. Se trata de datos originales que se ofrecen por bloques con un comentario resumen al final de cada uno; de este documento se pueden extraer criterios de planificación en materia de salud renal.
Dynamical Autler-Townes control of a phase qubit
Creators: name: Li, Jian
name: Paraoanu, G. S.
name: Cicak, Katarina
name: Altomare, Fabio
name: Park, Jae I.
name: Simmonds, Raymond W.
name: Sillanpaa, Mika A.
name: Hakonen, Pertti J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Routers, switches, and repeaters are essential components of modern information-processing systems. Similar devices will be needed in future superconducting quantum computers. In this work we investigate experimentally the time evolution of Autler-Townes splitting in a superconducting phase qubit under the application of a control tone resonantly coupled to the second transition. A three-level model that includes independently determined parameters for relaxation and dephasing gives excellent agreement with the experiment. The results demonstrate that the qubit can be used as a ON/OFF switch with 100 ns operating time-scale for the reflection/transmission of photons coming from an applied probe microwave tone. The ON state is realized when the control tone is sufficiently strong to generate an Autler-Townes doublet, suppressing the absorption of the probe tone photons and resulting in a maximum of transmission.
description: 8 pages, 8 figures
Where do we fit in? : an explanation of the provinces' place in the Canada-US relationship and their involvement in re-negotiating NAFTA
Creators: name: Lehner, Chelsea Rae
Publisher: name: University of British Columbia
Year: 2017

description: The purpose of this paper is to explore the place of the provinces in the Canada-United States relationship by looking at the renegotiation of the North American Free Trade Agreement. In order to understand the current Canada-US relationship, a brief overview of the history of the relationship will be presented as well as various ways to define the relationship. This paper seeks to explain the constitutional place of the provinces in this complex relationship. The Canadian economy relies on natural resources, a matter of provincial jurisdiction. The provinces feel this earns them a place at the negotiating table. This paper argues the provinces will not have a seat at the negotiating table with the federal government, as occurred during the Canada-European Union Comprehensive Economic and Trade Agreement (CETA) negotiations. The provinces are motivated to try and recreate a CETA-like negotiation environment, which would get each province to the negotiation table. The provinces want to lobby the US federal government to create this environment because the US has more power in the Canada-US trade relationship. The personal relationships various Premiers have created will help to increase their individual provincial bargaining positions. There have been varying levels of provincial involvement in preparing for NAFTA negotiations. In order for the Canadian government to present an image of unity to the US, the provinces will not have direct involvement but will instead be consulted. This paper will argue the level of provincial involvement during CETA was an isolated example. All ten provinces at the table, vying for their own self-interests at the expense of other provinces, would harm the country as a whole.
On the functional limits for partial sums under stable law
Creators: name: Gonchigdanzan, Khurelbaatar
name: Kosiński, Kamil Marcin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: G0F05 (Primary)

description: For the partial sums $(S_n)$ of independent random variables we define a stochastic process $s_n(t):=(1/d_n)\sum_{k \le [nt]} ({S_k}/{k}-μ)$ and prove that $$(1/{\log N})\sum_{n\le N}(1/n)\mathbf {I}\left\{s_n(t)\le x\right\} \to G_t(x)\quad \text{a.s.}$$ if and only if $(1/{\log N})\sum_{n\le N} (1/n)\mathbb{P}\left(s_n(t)\le x\right) \to G_t(x)$, for some sequence $(d_n)$ and distribution $G_t$. We also prove an almost sure functional limit theorem for the product of partial sums of i.i.d. positive random variables attracted to an $α$-stable law with $α\in (1,2]$.
On the topology of free paratopological groups
Creators: name: Elfard, Ali Sayed
name: Nickolas, Peter
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 22A30, 54D10, 54E99, 54H99

description: The result often known as Joiner's lemma is fundamental in understanding the topology of the free topological group $F(X)$ on a Tychonoff space$X$. In this paper, an analogue of Joiner's lemma for the free paratopological group $\FP(X)$ on a $T_1$ space $X$ is proved. Using this, it is shown that the following conditions are equivalent for a space $X$: (1) $X$ is $T_1$; (2) $\FP(X)$ is $T_1$; (3) the subspace $X$ of $\FP(X)$ is closed; (4) the subspace $X^{-1}$ of $\FP(X)$ is discrete; (5) the subspace $X^{-1}$ is $T_1$; (6) the subspace $X^{-1}$ is closed; and (7) the subspace $\FP_n(X)$ is closed for all $n \in \N$, where $\FP_n(X)$ denotes the subspace of $\FP(X)$ consisting of all words of length at most $n$.
description: http://blms.oxfordjournals.org/cgi/content/abstract/bds031?ijkey=9Su2bYV9e19JMxf&keytype=ref
Bottom-up/top-down synthesis of stable zirconium hydroxide nanophases
Creators: name: Ambrosi, Moira
name: Fratini, Emiliano
name: Canton, Patrizia
name: Dankesreiter, Stephan
name: Baglioni, Piero
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: 540 Chemie

description: It is well known that the structure of ZrO2 powder synthesized by low temperature calcination of hydrous zirconia is strongly affected by the nature and properties of precursors. In the present paper, we combined a precipitation/restructuring approach (bottom-up/top-down methodology) to produce zirconium hydroxide nanoparticles that transform into stable nanophasic tetragonal zirconia by low temperature calcination. The dimension and structure of precursors could be modulated by adjusting pH. The synthetic route was investigated by Raman spectroscopy, X-Ray Diffraction, Small-Angle X-Ray Scattering and High-Resolution Transmission Electron Microscopy. The zirconium hydroxide nanoparticles represent the final product of the overall process, which starts as a bottom-up synthesis of the hydroxide gel, followed by a top-down reorganization stage. During this rearrangement, the evolving structure passes through a mass fractal that arises from the clustering of the primary zirconium hydroxide nano-units.
Structural and thermodynamic properties of molecular complexes of aluminum and gallium trihalides with bifunctional donor pyrazine: decisive role of Lewis acidity in 1D polymer formation
Creators: name: Sevastianova, T. N.
name: Bodensteiner, Michael
name: Lisovenko, A. S.
name: Davydova, E. I.
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 540 Chemie

description: Solid state structures of group 13 metal halide complexes with pyrazine (pyz) of 2 : 1 and 1 : 1 composition have been established by X-ray structural analysis. Complexes of 2 : 1 composition adopt molecular structures MX3·pyz·MX3 with tetrahedral geometry of group 13 metals. Complexes of AlBr3 and GaCl3 of 1 : 1 composition are 1D polymers (MX3·pyz)∞ with trigonal bipyramidal geometry of the group 13 metal, while the weaker Lewis acid GaI3 forms the monomeric molecular complex GaI3·pyz, which is isostructural to its pyridine analog GaI3·py. Tensimetry studies of vaporization and thermal dissociation of AlBr3·pyz and AlBr3·pyz·AlBr3 complexes have been carried out using the static method with a glass membrane null-manometer. Thermodynamic characteristics of vaporization and equilibrium gas phase dissociation of the AlBr3·pyz complex have been determined. Comprehensive theoretical studies of (MX3)n·(pyz)m complexes (M = Al, Ga; X = Cl, Br, I; n = 1, 2; m = 1–3) have been carried out at the B3LYP/TZVP level of theory. Donor–acceptor bond energies were obtained taking into account reorganization energies of the fragments. Computational data indicate that the formation of (MX3·pyz)∞ polymers with coordination number 5 is only slightly more energetically favorable than the formation of molecular complexes of type MX3·pyz for X = Cl, Br. It is expected that on melting (MX3·pyz)∞ polymers dissociate into individual MX3·pyz molecules. This dovetails with low melting enthalpies of the (MX3·pyz)∞ complexes. Polymer stability decreases in the order AlCl3 > AlBr3 > GaCl3 > AlI3 > GaBr3 > GaI3. For MI3·pyz complexes computations predict that the monomeric structure motif is more energetically favorable compared to the catena polymer. These theoretical predictions agree well with the experimentally observed monomeric complex GaI3·pyz in the solid state. Thus, the Lewis acidity of the group 13 halides may play a decisive role in the formation of 1D polymeric networks.
Noncommutative integrability and action-angle variables in contact geometry
Creators: name: Jovanovic, Bozidar
Publisher: name: arXiv
Year: 2011
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D35, 37J35, 37J55

description: We introduce a notion of the noncommutative integrability within a framework of contact geometry.
description: 22 pages,1 figure, Theorem 5 slightly modified
Hyperbolic entire functions with full hyperbolic dimension and approximation by Eremenko-Lyubich functions
Creators: name: Rempe-Gillen, Lasse
Publisher: name: arXiv
Year: 2011
Subjects: subject: Complex Variables (math.CV)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 30D05, 30E10, 37F10 (Primary) 30D10, 30D15, 37F35 (Secondary)

description: We show that there exists a hyperbolic entire function of finite order of growth such that the hyperbolic dimension---that is, the Hausdorff dimension of the set of points in the Julia set of whose orbit is bounded---is equal to two. This is in contrast to the rational case, where the Julia set of a hyperbolic map must have Hausdorff dimension less than two, and to the case of all known explicit hyperbolic entire functions. In order to obtain this example, we prove a general result on constructing entire functions in the Eremenko-Lyubich class with prescribed behavior near infinity, using Cauchy integrals. This result significantly increases the class of functions that were previously known to be approximable in this manner. Furthermore, we show that the approximating functions are quasiconformally conjugate to their original models, which simplifies the construction of dynamical counterexamples. We also give some further applications of our results to transcendental dynamics.
description: 36 pages, 1 figure. V3: Minor revisions from V2. To appear in Proceedings of the London Mathematical Society
Photodissociation dynamics of tert-butylnitrite following excitation to the S1 and S2 states. A study by velocity-map ion-imaging and 3D-REMPI spectroscopy
Creators: name: Wenge, Andreas Maximilian
name: Schmaunz, Andreas F.
name: Kensy, Uwe
name: Dick, Bernhard
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: 540 Chemie

description: Excitation of tert-butylnitrite into the first and second UV absorption bands leads to efficient dissociation into the fragment radicals NO and tert-butoxy in their electronic ground states 2Π and 2E, respectively. Velocity distributions and angular anisotropies for the NO fragment in several hundred rotational and vibrational quantum states were obtained by velocity-map imaging and the recently developed 3D-REMPI method. Excitation into the well resolved vibronic progression bands (k = 0, 1, 2) of the NO stretch mode in the S1 ← S0 transition produces NO fragments mostly in the vibrational state with v = k, with smaller fractions in v = k − 1 and v = k − 2. It is concluded that dissociation occurs on the purely repulsive PES of S1 without barrier. All velocity distributions from photolysis via the S1(nπ*) state are monomodal and show high negative anisotropy (β ≈ −1). The rotational distributions peak near j = 30.5 irrespective of the vibronic state S1(k) excited and the vibrational state v of the NO fragment. On average 46% of the excess energy is converted to kinetic energy, 23% and 31% remain as internal energy in the NO fragment and the t-BuO radical, respectively. Photolysis via excitation into the S2 ← S0 transition at 227 nm yields NO fragments with about equal populations in v = 0 and v = 1. The rotational distributions have a single maximum near j = 59.5. The velocity distributions are monomodal with positive anisotropy β ≈ 0.8. The average fractions of the excess energy distributed into translation, internal energy of NO, and internal energy of t-BuO are 39%, 23%, and 38%, respectively. In all cases ∼8500 cm−1 of energy remain in the internal degrees of freedom of the t-BuO fragment. This is mostly assigned to rotational energy. An ab initio calculation of the dynamic reaction path shows that not only the NO fragment but also the t-BuO fragment gain large angular momentum during dissociation on the purely repulsive potential energy surface of S2.
Optimal transport and dynamics of expanding circle maps acting on measures
Creators: name: Kloeckner, Benoit
Publisher: name: arXiv
Year: 2010
Subjects: subject: Dynamical Systems (math.DS)
subject: Differential Geometry (math.DG)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Using optimal transport we study some dynamical properties of expanding circle maps acting on measures by push-forward. Using the definition of the tangent space to the space of measures introduced by Gigli, their derivative at the unique absolutely continuous invariant measure is computed. In particular it is shown that 1 is an eigenvalue of infinite multiplicity, so that the invariant measure admits many deformations into nearly invariant ones. As a consequence, we obtain counter-examples to an infinitesimal version of Furstenberg's conjecture. We also prove that this action has positive metric mean dimension with respect to the Wasserstein metric.
description: 35 pages; v4 includes a corrigendum (Lemma 4.2 statement and proofs are corrected without influence on the main results) and an addendum (application to an infinitesimal version of Furstenberg Conjecture, Theorem 1.7 and Corollary 1.8)
Luminescence spectroscopy of singlet oxygen enables monitoring of oxygen consumption in biological systems consisting of fatty acids
Creators: name: Gollmer, Anita
name: Regensburger, Johannes
name: Maisch, Tim
name: Bäumler, Wolfgang
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 540 Chemie
subject: 610 Medizin

description: The interaction of singlet oxygen (1O2) generated in a photosensitized process with well-known reference photosensitizers Perinaphthenone (PN) and TMPyP is investigated in a model system consisting of fatty acids and the respective exogenous photosensitizer (PS) in solution by direct detection of the luminescence photons of 1O2 at 1270 nm. Such a model system is a first approach to mimic the complex environment of 1O2 in a biological cell which consists mainly of water, proteins, sugars and lipids. Firstly, the important issue of oxygen consumption is evaluated which has to be considered during luminescence detection of 1O2. It is known that the luminescence signal of 1O2 is dependent on the oxygen concentration of the environment. Cellular components such as lipids represent oxygen consumers due to peroxidation of their unsaturated double bonds. Secondly, the experimental conditions for this model system regarding oxygen consumption are optimized to estimate the rates and rate constants of the coupled system. Thirdly, the triplet decay of the PS can provide more precise information about the actual oxygen concentration close to the PS and can be used, therefore, as a more precise method to determine the oxygen concentration in more complex systems such as a biological cell. The aim is to get a better understanding of photosensitized reactions of 1O2 with cellular components to further improve methodologies, in particular at a cellular level using luminescence spectroscopy. In conclusion, luminescence detection might be a helpful tool to monitor precisely and promptly changes in oxygen concentration in a complex environment.
P–P bond formation via reductive dimerization of [Cp*Fe(η5-P5)] by divalent samarocenes
Creators: name: Li, Tianshu
name: Gamer, Michael T.
name: Scheer, Manfred
name: Konchenko, Sergei N.
name: Roesky, Peter W.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 540 Chemie

description: The two new 3d/4f polyphosphide complexes [(Cp*Fe)2P10{Sm(η5-C5Me4R)2}2] (Cp* = η5-C5Me5; R = Me, nPr) were prepared by reductive dimerization of [Cp*Fe(η5-P5)] with samarocenes. They are the first P10 bridging 3d/4f metal complexes and the first examples of reductive coupling of polyphosphide complexes by divalent lanthanides.
Direct Detection of Vector Dark Matter
Creators: name: Hisano, Junji
name: Ishiwata, Koji
name: Nagata, Natsumi
name: Yamanaka, Masato
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper we complete formulae for the elastic cross section of general vector dark matter with nucleon in the direct detection at the leading order of the strong coupling constant, assuming that the dark matter is composed of vector particles. As an application of our formulae, the direct detection of the first Kaluza-Klein photon in the minimal universal extra dimension model is discussed. It is found that the cross section is larger than those in the previous works by up to a factor of ten.
description: 22 pages, 11 figures; two typos in equations are corrected
Waves in General Relativistic Two-fluid Plasma around a Schwarzschild Black Hole
Creators: name: Rahman, M. Atiqur
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Waves propagating in the relativistic electron-positron or ions plasma are investigated in a frame of two-fluid equations using the 3+1 formalism of general relativity developed by Thorne, Price and Macdonald (TPM). The plasma is assumed to be freefalling in the radial direction toward the event horizon due to the strong gravitational field of a Schwarzschild black hole. The local dispersion relations for transverse and longitudinal waves have been derived, in analogy with the special relativistic formulation as explained in an earlier paper, to take account of relativistic effects due to the event horizon using WKB approximation
description: 7 pages; Astrophys Space Sci (2012). arXiv admin note: substantial text overlap with arXiv:1008.4838
Reaction of Sn44− in liquid ammonia: the formation of Rb6[(η2-Sn4)Zn(η3-Sn4)]·5NH3
Creators: name: Fendt, Franziska
name: Koch, Carina
name: Gärtner, Stefanie
name: Korber, Nikolaus
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 540 Chemie

description: The reaction of Rb4Sn4 with ZnPh2 in liquid ammonia in the presence of [2.2.2]-cryptand yielded crystals of Rb6[(η2-Sn4)Zn(η3-Sn4)]·5NH3, which could be characterized by single crystal X-ray diffraction. This is the first example of a successful solution reaction of the highly charged tetrahedral Sn44− anions. The homoleptic [E4ZnE4]6− complex (E = tetrel element) was previously known only for E[double bond, length as m-dash]Ge and Si/Ge.
Time-dependent CP asymmetries in D and B decays
Creators: name: Bevan, Adrian
name: Inguglia, Gianluca
name: Meadows, Brian
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The measurement of time-dependent CP asymmetries in charm decays can provide a unique insight into the flavor changing structure of the Standard Model. We examine a number of different CP eigenstate decays of D mesons and describe a method that can be used to measure time-dependent CP asymmetries at existing and future experiments, with a preliminary assessment, based on statistical considerations, of their various capabilities. Any asymmetry observed in time-dependent analysis of neutral D mesons could signify new physics. We discuss the measurements required to perform direct and indirect tests of the charm unitarity triangle and the relationship between this and the B_d unitarity triangle. We also highlight that current experimental bounds on DeltaGamma(B_d) translate into a significant systematic uncertainty on the measurement of beta from b to c c-bar s decays.
description: 19 pages, 7 figures, 3 tables
Scattering effect in proton beam windows at spallation targets
Creators: name: Meng, C.
name: Tang, J. Y.
name: Jing, H. T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Proton beam window (PBW) is a boundary wall between a high vacuum area in the proton beam line and the helium atmosphere in a helium vessel at a high beam power target. The thermal and mechanical problems of the PBW have been studied in other spallation neutron sources; however, the scattering effect in PBW is seldom reported in literature but it may pose serious problems for the target design if not well treated. This paper will report the simulation studies of the scattering effect in PBW. Different materials and different structures of PBW are discussed. Taking CSNS as an example, a thin single-layer aluminum alloy PBW with edge cooling has been chosen for CSNS-I and CSNS-II, and a sandwiched aluminum alloy PBW has been chosen for CSNS-III. Simulations results of the scattering effect in the presence of beam uniformization at target by using non-linear magnets at the different CSNS PBWs are presented. The simulations show that the scattering effect at PBW is very important in the beam loss and the beam distribution at the target.
description: 8 pages, 6 figures, 6 tables. Appears in High Power Laser and Particle Beams 2011
How ionic liquids can help to stabilize native proteins
Creators: name: Weingärtner, Hermann
name: Cabrele, Chiara
name: Herrmann, Christian
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: 540 Chemie

description: The native state of a globular protein is essential for its biocatalytic function, but is marginally stable against unfolding. While unfolding equilibria are often reversible, folding intermediates and misfolds can promote irreversible protein aggregation into amorphous precipitates or highly ordered amyloid states. Addition of ionic liquids—low-melting organic salts—offers intriguing prospects for stabilizing native proteins and their enzymatic function against these deactivating reaction channels. The huge number of cations and anions that form ionic liquids allows fine-tuning of their solvent properties, which offers robust and efficient strategies for solvent optimization. Going beyond case-by-case studies, this article aims at discussing principles for a rational design of ionic liquid-based formulations in protein chemistry and biocatalysis.
Extremes of multidimensional Gaussian processes
Creators: name: Dębicki, Krzysztof
name: Kosiński, Kamil Marcin
name: Mandjes, Michel
name: Rolski, Tomasz
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G15 (Primary), 60G70 (Secondary)

description: This paper considers extreme values attained by a centered, multidimensional Gaussian process $X(t)= (X_1(t),\ldots,X_n(t))$ minus drift $d(t)=(d_1(t),\ldots,d_n(t))$, on an arbitrary set $T$. Under mild regularity conditions, we establish the asymptotics of \[\log\mathbb P\left(\exists{t\in T}:\bigcap_{i=1}^n\left\{X_i(t)-d_i(t)>q_iu\right\}\right),\] for positive thresholds $q_i>0$, $i=1,\ldots,n$, and $u\to\infty$. Our findings generalize and extend previously known results for the single-dimensional and two-dimensional cases. A number of examples illustrate the theory.
Pair housing of dairy calves in modified individual calf hutches : an on-farm demonstration
Creators: name: Whalin, Laura
Publisher: name: University of British Columbia
Year: 2017

description: The objective of this study was to determine if pair housing using a modified calf hutch on a commercial dairy farm would provide similar benefits to those previously described in research settings. Despite many benefits (e.g. improved weight gain and reduced fearfulness) of housing calves in small groups, individual calf hutches are still common in North America. This study took place on a commercial farm in the lower Fraser Valley region of British Columbia from May to December 2016. A week after birth, calves were randomly assigned to individual (n = 14) or paired (n = 8 pairs) hutches. Our modified pair hutch consisted of 2 individual hutches placed next to each other with both calves having access to both hutches and a common run. Calves were fed milk 2/day (d) using a nipple bottle, 6 Litres (L)/d from d 1 to d 7, 10 L/d from d 8 to d 35, and 6 L/d until d 60 (weaning). Ad libitum access to calf starter (solid food) and water was offered throughout the experiment. Feed intake was measured weekly until calves were 67 ± 5 d old. Body weight (BW) and health measures were recorded weekly until the calves were 88 d old. Calves were exposed to a novel food test at 60 d; the amount of food consumed in 30 minutes, and the latency to approach the novel food was measured. Pair housed calves ate more starter (0.89 (0.72 - 1.08) vs. 0.48 (0.42 - 0.56) kg/d; geometrical mean (confidence interval)) than individually housed calves. Pair housed calves also ate almost 3 times more food during the novel food test (154.13 ± 26.85 vs. 57.84 ± 19.55 g). There was no difference in BW or in the latency to approach the novel food. In conclusion, joining adjacent hutches is an option for pair housing that results in reduced fearfulness and increased solid food intake relative to individual hutches.
Option Pricing from Wavelet-Filtered Financial Series
Creators: name: de Almeida, V. T. X.
name: Moriconi, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We perform wavelet decomposition of high frequency financial time series into large and small time scale components. Taking the FTSE100 index as a case study, and working with the Haar basis, it turns out that the small scale component defined by most ($\simeq$ 99.6%) of the wavelet coefficients can be neglected for the purpose of option premium evaluation. The relevance of the hugely compressed information provided by low-pass wavelet-filtering is related to the fact that the non-gaussian statistical structure of the original financial time series is essentially preserved for expiration times which are larger than just one trading day.
description: 4 pages, 1 figure
Vibrations and hydrogen bonding in porphycene
Creators: name: Gawinkowski, S.
name: Walewski, L.
name: Vdovin, Alexander
name: Slenczka, Alkwin
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: 540 Chemie

description: Combined use of IR, Raman, neutron scattering and fluorescence measurements for porphycene isolated in helium nanodroplets, supersonic jet and cryogenic matrices, as well as for solid and liquid solutions, resulted in the assignments of almost all of 108 fundamental vibrations. The puzzling feature of porphycene is the apparent lack of the N–H stretching band in the IR spectrum, predicted to be the strongest of all bands by standard harmonic calculations. Theoretical modeling of the IR spectra, based on ab initio molecular dynamics simulations, reveals that the N–H stretching mode should appear as an extremely broad band in the 2250–3000 cm−1 region. Coupling of the N–H stretching vibration to other modes is discussed in the context of multidimensional character of intramolecular double hydrogen transfer in porphycene. The analysis can be generalized to other strongly hydrogen-bonded systems.
CRYSCOR: a program for the post-Hartree–Fock treatment of periodic systems
Creators: name: Pisani, C.
name: Schütz, Martin
name: Casassa, S.
name: Usvyat, Denis
name: Maschio, L.
name: Lorenz, Marco
name: Erba, A.
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: 540 Chemie

description: CRYSCOR is a periodic post-Hartree–Fock program based on local functions in direct space, i.e., Wannier functions and projected atomic orbitals. It uses atom centered Gaussians as basis functions. The Hartree–Fock reference, as well as symmetry information, is provided by the CRYSTAL program. CRYSCOR presently features an efficient and parallel implementation of periodic local second order Møller–Plesset perturbation theory (MP2), which allows us to study 1D-, 2D- and 3D-periodic systems beyond 1000 basis functions per unit cell. Apart from the correlation energy also the MP2 density matrix, and from that the Compton profile, are available. Very recently, a new module for calculating excitonic band gaps at the uncorrelated Configuration-Interaction-Singles (CIS) level has been added. Other advancements include new extrapolation techniques for calculating surface adsorption on semi-infinite solids. In this paper the diverse features and recent advances of the present CRYSCOR version are illustrated by exemplary applications to various systems: the adsorption of an argon monolayer on the MgO (100) surface, the rolling energy of a boron nitride nanoscroll, the relative stability of different aluminosilicates, the inclusion energy of methane in methane–ice-clathrates, and the effect of electron correlation on charge and momentum density of α-quartz. Furthermore, we present some first tentative CIS results for excitonic band gaps of simple 3D-crystals, and their dependence on the diffuseness of the basis set.
Organocatalytic visible light mediated synthesis of aryl sulfides
Creators: name: Majek, Michal
name: Jacobi von Wangelin, Axel
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 540 Chemie

description: Photo-sensitized synthesis of arylsulfides from arenediazonium salts in the presence of eosin Y has been developed. This protocol exhibits high functional group tolerance and a wide substrate scope and is an attractive alternative to the thermal reaction that involves explosive intermediates.