cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
EFFECT OF ETHER GROUPS ON THE STRUCTURE ACTIVITY RELATIONSHIP (SAR) OF NOVEL ANTIMICROBIAL COMPOUNDS
Creators: name: Minah, Jeanette Tewoh
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 34
subject: Chemical sciences
subject: FOS: Chemical sciences

description: Bacterial resistance to antibiotic treatment has become a major problem over the years originating from penicillin binding proteins, efflux pumps and the major contributor, beta-lactamases. Therefore, a need arises for developing new antimicrobial drugs, with a different mechanism of action, in-order to delay further bacterial resistance. Examples of such compounds prepared in our research group comprise of monocyclic β-lactams with distinct substituent groups attached to an aromatic thiol, at the C4 of the beta-lactam. These compounds, especially fluorinated thiophenols in the ortho position with the addition of benzyl isocyanate on the lactam nitrogen demonstrate activity against lipo-oliogosaccharide-containing bacteria, specifically Mycobacterium tuberculosis (Mtb). The focus of my research is to create a library of derivatives of these lactams with methoxy groups attached at various positions of the aromatic ring at C4 in-order to evaluate their activity against the aforementioned bacteria. SAR of these ether-containing-lactams against Mtb will be discussed.
It Could Happen to You: Thirty Years of Digital Preservation in an Ever-changing Organization
Creators: name: Hofsink, Inge
Publisher: name: Zenodo
Year: 2024

description: Presentation of paper "It Could Happen to You: Thirty Years of Digital Preservation in an Ever-changing Organization" at the iPres2024 conference in Gent, Belgium on September 17th 2024.

From the very start of digital preservation, KB National Library of the Netherlands (KBNL) has played a pioneering role in the digital preservation community. [...] But at a certain point in time KBNL became a bit quiet, and remained quiet for a while. Until almost ten years later, when the organization brought renewed focus on its preservation activities [...].

But what happened in those quiet years, and more importantly, how did it happen, and most importantly, how do we prevent it from happening again?

In this paper, I share my personal reflections as a preservation practitioner, about the impact of organizational context and culture on thirty years of digital preservation within KBNL, to unlock the past, present and future of digital preservation within our institution. [...]
K3 surfaces with non-symplectic involution and compact irreducible G_2-manifolds
Creators: name: Kovalev, Alexei
name: Lee, Nam-Hoon
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 53C25, 14J28

description: We consider the connected-sum method of constructing compact Riemannian 7-manifolds with holonomy G_2 developed in math.DG/0012189. The method requires pairs of projective complex threefolds endowed with anticanonical K3 divisors, the latter `matching' via a certain non-holomorphic map. Suitable examples of threefolds were previously obtained in math.DG/0012189 by blowing up curves in Fano threefolds. In this paper, we give further suitable algebraic threefolds using theory of K3 surfaces with non-symplectic involution due to Nikulin. These threefolds are not obtainable from Fano threefolds, as above, and admit matching pairs leading to topologically new examples of compact irreducible G_2-manifolds. `Geography' of the values of Betti numbers b^2,b^3 for the new (and previously known) examples of compact irreducible G_2 manifolds is also discussed.
description: 30 pages; v2: misprint in the abstract corrected (no changes in the paper); v3: formula for b^3(M) in Theorem 2.5 corrected, respective computations of examples revised, some arguments expanded, references added; v4: enhancements in Theorem 5.3, new Proposition 5.5, more examples, presentation improved
Magnetic field sensors using 13-spin cat states
Creators: name: Simmons, Stephanie
name: Jones, Jonathan A.
name: Karlen, Steven D.
name: Ardavan, Arzhang
name: Morton, John J. L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Measurement devices could benefit from entangled correlations to yield a measurement sensitivity approaching the physical Heisenberg limit. Building upon previous magnetometric work using pseudo-entangled spin states in solution-state NMR, we present two conceptual advancements to better prepare and interpret the pseudo-entanglement resource as well as the use of a 13-spin cat state to measure the local magnetic field with a sensitivity beyond the standard quantum limit.
description: 6 pages, 5 figures; v2: corrected figure 3, expanded conclusion, simplified explanation of equation 2; v3: accepted version
3D probability tomography: theoretical developments
and applications to high-resolution geophysical prospecting
Creators: name: Alaia, Raffaele <1975>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: GEO/10 Geofisica della terra solida

description: The theory of the 3D multipole probability tomography method (3D GPT) to image source poles, dipoles, quadrupoles and octopoles, of a geophysical vector or scalar field dataset is developed. A geophysical dataset is assumed to be the response of an aggregation of poles, dipoles, quadrupoles and octopoles. These physical sources are used to reconstruct without a priori assumptions the most probable position and shape of the true geophysical buried sources, by determining the location of their centres and critical points of their boundaries, as corners, wedges and vertices. This theory, then, is adapted to the geoelectrical, gravity and self potential methods. A few synthetic examples using simple geometries and three field examples are discussed in order to demonstrate the notably enhanced resolution power of the new approach. At first, the application to a field example related to a dipole–dipole geoelectrical survey carried out in the archaeological park of Pompei is presented. The survey was
finalised to recognize remains of the ancient Roman urban network including roads, squares and buildings, which were buried under the thick pyroclastic cover fallen during
the 79 AD Vesuvius eruption. The revealed anomaly structures are ascribed to wellpreserved remnants of some aligned walls of Roman edifices, buried and partially
destroyed by the 79 AD Vesuvius pyroclastic fall. Then, a field example related to a gravity survey carried out in the volcanic area of Mount Etna (Sicily, Italy) is presented, aimed at imaging as accurately as possible the
differential mass density structure within the first few km of depth inside the volcanic apparatus. An assemblage of vertical prismatic blocks appears to be the most probable
gravity model of the Etna apparatus within the first 5 km of depth below sea level. Finally, an experimental SP dataset collected in the Mt. Somma-Vesuvius volcanic
district (Naples, Italy) is elaborated in order to define location and shape of the sources of two SP anomalies of opposite sign detected in the northwestern sector of the
surveyed area. The modelled sources are interpreted as the polarization state induced by an intense hydrothermal convective flow mechanism within the volcanic apparatus,
from the free surface down to about 3 km of depth b.s.l..
Explicit formulas for Laplace transforms of certain functionals of some time inhomogeneous diffusions
Creators: name: Barczy, Matyas
name: Pap, Gyula
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 60E10 (Primary), 60J60, 62F12 (Secondary)

description: We consider a process $(X_t)_{t\in[0,T)}$ given by the SDE $dX_t = αb(t)X_t dt + σ(t) dB_t$, $t\in[0,T)$, with initial condition $X_0=0$, where $T\in(0,\infty]$, $α\in R$, $(B_t)_{t\in[0,T)}$ is a standard Wiener process, $b:[0,T)\to R\setminus\{0\}$ and $σ:[0,T)\to(0,\infty)$ are continuously differentiable functions. Assuming that $b$ and $σ$ satisfy a certain differential equation we derive an explicit formula for the joint Laplace transform of $\int_0^t\frac{b(s)^2}{σ(s)^2}(X_s)^2 ds$ and $(X_t)^2$ for all $t\in[0,T)$. As an application, we study asymptotic behavior of the maximum likelihood estimator of $α$ for $\sign(α-K)=\sign(K)$, $K\ne0$, and for $α=K$, $K\ne0$. As an example, we examine the so-called $α$-Wiener bridges given by SDE $dX_t = -\fracα{T-t}X_t dt + dB_t$, $t\in[0,T)$, with initial condition $X_0=0$.
description: 27 pages, references are updated
Mapping the Metals in Spiral Galaxies with the Hubble and Roman Space Telescopes
Creators: name: Telford, Grace
Publisher: name: Zenodo
Year: 2021

description: Metals encode the evolutionary histories of galaxies, tracing past accretion events and gaseous outflows. The spatial distribution of metals in galaxies is therefore a powerful constraint for galaxy formation models. We present a spatially resolved accounting of metals in the nearby massive spiral M31, where resolved-star photometry across ~1/3 of the disk was obtained by the Panchromatic Hubble Andromeda Treasury (PHAT) survey. Using the star formation and enrichment histories inferred from the PHAT data, we calculate the total stellar mass formed, the history of metal production by those stars, and the present-day metal mass locked into stars. Combining the stellar metals with the gas-phase metallicity gradient and maps of dust and atomic hydrogen, we conduct a census of metals present in the PHAT footprint, and compare to the total metal mass produced. We find that 62% of the metal mass has been lost via outflows, and that net metal loss is required under any model assumptions. We further show that metals produced in the last 1.5 Gyr have been redistributed within M31's disk. The Roman Space Telescope's wide field of view will obtain resolved-star photometry over large areas of other nearby spirals, mapping stellar metallicity and mass extending into the stellar halos. These data will expand spatially resolved analyses of spiral galaxies' metal content beyond M31, enabling new constraints on the impact of galaxy assembly histories on chemical evolution processes.
Spin-density functional study of the organic polymer dimethylaminopyrrole: A realization of the organic periodic Anderson model
Creators: name: Suwa, Yuji
name: Arita, Ryotaro
name: Kuroki, Kazuhiko
name: Aoki, Hideo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: While the periodic Anderson model (PAM) has been recognized as a good model for various heavy f-electron systems, here we design a purely organic polymer whose low-energy physics can be captured by PAM. By means of the spin density functional calculation, we show that polymer of dimethylaminopyrrole is a candidate, where its ground state can indeed be magnetic depending on the doping. We discuss the factors favoring ferromagnetic ground state.
description: 8 pages, 8 figures
Continuum reduction in large N gauge theories
Creators: name: Narayanan, Rajamani
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: These are notes associated with three lectures given at the 49th Cracow School of Theoretical physics where a pedagogical explanation of the Gross-Witten transition, Eguchi-Kawai reduction and continuum reduction were given, followed by a description of the numerical computation of fermionic observables in the 't Hooft limit of large N gauge theory.
description: 18 pages, Lectures given at the 49th Cracow School of Theoretical Physics
Orbital properties of binary minor planets
Creators: name: Naoz, Smadar
name: Perets, Hagai B.
name: Ragozzine, Darin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Many binary minor planets (BMPs; both binary asteroids and binary Trans-Neptunians objects; TNOs) are known to exist in the Solar system. The currently observed orbital and physical properties of BMPs hold essential information and clues about their origin, their evolution and the conditions underwhich they evolved. Here we study the orbital properties of BMPs with currently known orbital solutions (the BMPs mutual orbits and not the BMP orbits around the sun). We find that BMPs are typically highly inclined relative to their orbit around the sun, with a distribution consistent with an isotropic distribution. BMPs not affected by tidal forces are found to have high eccentricities with non-thermal eccentricity distribution peaking at intermediate eccentricities (typically 0.4-0.6). The high inclinations and eccentricities of the BMPs suggest that BMPs evolved in a dense collisional environment, in which gravitational encounters in addition to tidal and secular Kozai affects played an important role in their orbital evolution.
description: submitted to ApJ, 3 figures 2 tables, mutual inclination calculation corrected, the conclusions didn't changed
Storage, Accumulation and Deceleration of Secondary Beams for Nuclear Astrophysics
Creators: name: Glorius, J.
name: Litvinov, Yu. A.
name: Aliotta, M.
name: Amjad, F.
name: Brückner, B.
name: Bruno, C. G.
name: Chen, R.
name: Davinson, T.
name: Dellmann, S. F.
name: Dickel, T.
name: Dillmann, I.
name: Erbacher, P.
name: Forstner, O.
name: Geissel, H.
name: Griffin, C. J.
name: Grisenti, R.
name: Gumberidze, A.
name: Haettner, E.
name: Hess, R.
name: Hillenbrand, P. -M.
name: Hornung, C.
name: Joseph, R.
name: Jurado, B.
name: Kazanseva, E.
name: Knöbel, R.
name: Kostyleva, D.
name: Kozhuharov, C.
name: Kuzminchuk, N.
name: Langer, C.
name: Leckenby, G.
name: Lederer-Woods, C.
name: Lestinsky, M.
name: Litvinov, S.
name: Löher, B.
name: Lorenz, B.
name: Lorenz, E.
name: Marsh, J.
name: Menz, E.
name: Morgenroth, T.
name: Mukha, I.
name: Petridis, N.
name: Popp, U.
name: Psaltis, A.
name: Purushothaman, S.
name: Reifarth, R.
name: Rocco, E.
name: Roy, P.
name: Sanjari, M. S.
name: Scheidenberger, C.
name: Sguazzin, M.
name: Sidhu, R. S.
name: Spillmann, U.
name: Steck, M.
name: Stöhlker, T.
name: Swartz, J. A.
name: Tanaka, Y. K.
name: Törnqvist, H.
name: Varga, L.
name: Vescovi, D.
name: Weick, H.
name: Weigand, M.
name: Woods, P. J.
name: Yamaguchi, T.
name: Zhao, J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Low-energy investigations on rare ion beams are often limited by the available intensity and purity of the ion species in focus. Here, we present the first application of a technique that combines in-flight production at relativistic energies with subsequent secondary beam storage, accumulation and finally deceleration to the energy of interest. Using the FRS and ESR facilities at GSI, this scheme was pioneered to provide a secondary beam of $^{118}$Te$^{52+}$ for the measurement of nuclear proton-capture at energies of 6 and 7 MeV/u. The technique provided stored beam intensities of about $10^6$ ions at high purity and brilliance, representing a major step towards low-energy nuclear physics studies using rare ion beams.
Database over sager fra grønlandsministeriet 1957-1988
Creators: Statens Arkiver
Publisher: name: Rigsarkivet
Year: 2022

description: En retrospektiv registrering af samtlige af grønlandsministeriets journalsager, for endeligt at kortlægge hvilke sager der eksisterer, og om der eventuelt er sager, der er forsvundet.
Spatial correlations of entangled polymer dynamics
Creators: name: Ma, Jihong
name: Carrillo, Jan-Michael Y.
name: Do, Changwoo
name: Chen, Wei-Ren
name: Falus, Péter
name: Shen, Zhiqiang
name: Hong, Kunlun
name: Sumpter, Bobby G.
name: Wang, Yangyang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The spatial correlations of entangled polymer dynamics are examined by molecular dynamics simulations and neutron spin-echo spectroscopy. Due to the soft nature of topological constraints, the initial spatial decays of intermediate scattering functions of entangled chains are, to the first approximation, surprisingly similar to those of an unentangled system in the functional forms. However, entanglements reveal themselves as a long tail in the reciprocal-space correlations, implying a weak but persistent dynamic localization in real space. Comparison with a number of existing theoretical models of entangled polymers suggests that they cannot fully describe the spatial correlations revealed by simulations and experiments. In particular, the strict one-dimensional diffusion idea of the original tube model is shown to be flawed. The dynamic spatial correlation analysis demonstrated in this work provides a useful tool for interrogating the dynamics of entangled polymers. Lastly, the failure of the investigated models to even qualitatively predict the spatial correlations of collective single-chain density fluctuations points to a possible critical role of incompressibility in polymer melt dynamics.
The Typed Graph Model
Creators: name: Laux, Fritz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: In recent years, the Graph Model has become increasingly popular, especially in the application domain of social networks. The model has been semantically augmented with properties and labels attached to the graph elements. It is difficult to ensure data quality for the properties and the data structure because the model does not need a schema. In this paper, we propose a schema bound Typed Graph Model with properties and labels. These enhancements improve not only data quality but also the quality of graph analysis. The power of this model is provided by using hyper-nodes and hyper-edges, which allows to present a data structure on different abstraction levels. We demonstrate by example the superiority of this model over the property graph data model of Hidders and other prevalent data models, namely the relational, object-oriented, and XML model.
description: 7 pages, 7 figures, Conference paper
Database over sager fra grønlandsministeriet 1954-1957
Creators: Statens Arkiver
Publisher: name: Rigsarkivet
Year: 2022

description: En retrospektiv registrering af samtlige af grønlandsministeriets journalsager, for endeligt at kortlægge hvilke sager der eksisterer, og om der eventuelt er sager, der er forsvundet.
Analytic torsion for twisted de Rham complexes
Creators: name: Mathai, Varghese
name: Wu, Siye
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 58J52 (Primary), 57Q10, 58J40, 81T30 (Secondary)

description: We define analytic torsion for the twisted de Rham complex, consisting of the spaces of differential forms on a compact oriented Riemannian manifold X valued in a flat vector bundle E, with a differential given by a flat connection on E plus an odd-degree closed differential form H on X. The difficulty lies in the fact that the twisted de Rham complex is only Z_2-graded, and so the definition of analytic torsion in this case uses pseudo-differential operators and residue traces. We show that when dim X is odd, then the twisted analytic torsion is independent of the choice of metrics on X and E and of the representative H in the cohomology class of H. We define twisted analytic torsion in the context of generalized geometry and show that when H is a 3-form, the deformation H -> H - dB, where B is a 2-form on X, is equivalent to deforming a usual metric g to a generalized metric (g,B). We establish some basic functorial properties. When H is a top-degree form, we compute the torsion, define its simplicial counterpart and prove an analogue of the Cheeger-Muller Theorem. We also study the relationship of the analytic torsion for T-dual circle bundles with integral 3-form fluxes.
description: 24 pages LaTeX; corrections and additions; Keywords: Analytic torsion, twisted de Rham cohomology, generalized geometry, $T$-duality
Stochastic 2D hydrodynamical systems: Wong-Zakai approximation and Support theorem
Creators: name: Chueshov, Igor
name: Millet, Annie
Publisher: name: arXiv
Year: 2009
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We deal with a class of abstract nonlinear stochastic models with multiplicative noise, which covers many 2D hydrodynamical models including the 2D Navier-Stokes equations, 2D MHD models and 2D magnetic Bénard problems as well as some shell models of turbulence. Our main result describes the support of the distribution of solutions. Both inclusions are proved by means of a general Wong-Zakai type result of convergence in probability for non linear stochastic PDEs driven by a Hilbert-valued Brownian motion and some adapted finite dimensional approximation of this process.
Additional file 8 of DNA methylation and its effects on gene expression during primary to secondary growth in poplar stems
Creators: name: Zhang, Yang
name: Liu, Cong
name: Cheng, He
name: Tian, Shuanghui
name: Liu, Yingying
name: Wang, Shuang
name: Zhang, Huaxin
name: Saqib, Muhammad
name: Wei, Hairong
name: Wei, Zhigang
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 8. Methylation levels in various transposable elements (TEs) and their 2 kb proximal regions in primary stems (PS), transitional stems (TS), and secondary stems (SS). The y-axis represents methylation levels.
Xylocopa torrida
Creators: name: Aistleitner, Eyjolf
name: Hölzler, Gerald
name: L, Xylocopa
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae
Xylocopa
Xylocopa torrida

description: Xylocopa torrida (W ESTWOOD, 1838)
 M a t e r i a l u n t e r s u c h t: Africa, Kamerun mer., Kribi, 1-10 m, 2°65‘ N, 9° 54‘ E, 31.1.1995, 1♀; Prov. South West, Meme, Ediki S Kumba, Bakundu Forest, 50-150 m, III.1995, 1♁ und V. 1995, 1♁, leg. local people.
A n m e r k u n g: In ganz Afrika südlich der Sahara, weit verbreitet.
description: Published as part of Aistleitner, Eyjolf, Hölzler, Gerald & L, Xylocopa, 2023, Holzbienen von Cabo Verde (Kapverden) sowie einige Streufunde aus Afrika und der Mediterraneis (Hymenoptera, Apidae, Xylocopa LATREILLE, 1802), pp. 507-515 in Linzer biologische Beiträge 54 (2) on page 512, DOI: 10.5281/zenodo.10414493
Maximum entropy estimation of transition probabilities of reversible Markov chains
Creators: name: Van der Straeten, Erik
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper, we develop a general theory for the estimation of the transition probabilities of reversible Markov chains using the maximum entropy principle. A broad range of physical models can be studied within this approach. We use one-dimensional classical spin systems to illustrate the theoretical ideas. The examples studied in this paper are: the Ising model, the Potts model and the Blume-Emery-Griffiths model.
Essays in Industrial Organization
Creators: name: Esfahani, Hamideh <1978>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: SECS-P/06 Economia applicata

description: This dissertation comprises four essays on the topic of industrial organization and environmental economics. The first essay investigates the profitability of horizontal mergers of firms with price adjustments. We take a differential game approach and both the open-loop as well as the closed-loop equlibria are considered. In the second essay, using the same approach as the first one, we study the profitability of horizontal merger of firms where the demand function is nonlinear. We take into consideration the open-loop equilibrium. The third essay studies the profitability of exogenous output constraint in a differential game model with price dynamics under the feedback strategies. The fourth essay investigates a second-best trade agreement between two countries when pollution spillovers are asymmetric to examine the strategic behavior of governments in using pollution taxes and tariffs under trade liberalization.
Optical and Near-Infrared Monitoring of Gamma-ray Binaries Hosting Be Stars
Creators: name: Moritani, Yuki
name: Kawachi, Akiko
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Optical and near-infrared observations are compiled for the three gamma-ray binaries hosting Be stars: PSR B1259-63, LSI+61 303, and HESS J0632+057. The emissions from the Be disk are considered to vary according to the changes in its structure, some of which are caused by interactions with the compact object (e.g., tidal forces). Due to the high eccentricity and large orbit of these systems, the interactions -- and, hence the resultant observables -- depend on the orbital phase. To explore such variations, multi-band photometry and linear polarization were monitored for the three considered systems, using two 1.5 m-class telescopes: IRSF at the South African Astronomical Observatory and Kanata at the Higashi-Hiroshima Observatory.
description: accepted to Universe
Small fluctuations at the unstable steady state
Creators: name: Mangel, Marc
Publisher: name: University of British Columbia
Year: 2010

description: The effects of small random fluctuations on deterministic systems are studied. The deterministic systems of interest have multiple steady states. As parameters vary, two or three of the steady states coalesce. This work is concerned with the long time behavior of the system, when the system starts near an unstable steady state. The deterministic separatrix is surrounded by a tube that contains up to two stable steady states. The quantity of basic interest is the probability of first exit from the tube through a specified boundary, conditioned on initial position. In the diffusion approximation this probability satisfies a backward diffusion equation. Formal asymptotic solutions of the backward equation are constructed. The solutions are obtained by a generalized "ray method" and are given in terms of various incomplete special functions. As an example, the effects of fluctuations on a substrate inhibited reaction in an open vessel are analyzed. The theory is compared with exact solutions, for a one dimensional model; and Monte Carlo experiments, for a two dimensional model.
Phase separation and pairing regimes in the one-dimensional asymmetric Hubbard model
Creators: name: Barbiero, L.
name: Casadei, M.
name: Dalmonte, M.
name: Boschi, C. Degli Esposti
name: Ercolessi, E.
name: Ortolani, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address some open questions regarding the phase diagram of the one-dimensional Hubbard model with asymmetric hopping coefficients and balanced species. In the attractive regime we present a numerical study of the passage from on-site pairing dominant correlations at small asymmetries to charge-density waves in the region with markedly different hopping coefficients. In the repulsive regime we exploit two analytical treatments in the strong- and weak-coupling regimes in order to locate the onset of phase separation at small and large asymmetries respectively.
description: 13 pages, RevTeX 4, 12 eps figures, some additional refs. with respect to v1 and citation errors fixed
Superconducting THz sources with 12% power efficiency
Creators: name: Cattaneo, R.
name: Borodianskyi, E. A.
name: Kalenyuk, A. A.
name: Krasnov, V. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Low power efficiency is one of the main problems of THz sources, colloquially known as the THz gap. In this work we present prototypes of THz devices based on whisker-crystals of a hightemperature superconductor Bi2Sr2CaCu2O8+d with a record high radiation power efficiency of 12% at a frequency of 4 THz. We employ various on- and off-chip detection techniques and, in particular, use the radiative cooling phenomenon for accurate evaluation of the emission power. We argue that such devices can be used for creation of tunable, monochromatic, continuous-wave, compact and power-efficient THz sources.
description: 6 pages, 3 figures
Continuous prime systems satisfying $N(x)=c(x-1)+1$
Creators: name: Schlage-Puchta, Jan-Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11N80, 11M99, 11Y60

description: Hilberdink showed that there exists a constant $c_0>2$, such that there exists a continuous prim system satisfying $N(x)=c(x-1)+1$ if and only if $c\leq c_0$. Here we determine $c_0$ numerically to be $1.25479\cdot 10^{19}\pm2\cdot 10^{14}$. To do so we compute a representation for a twisted exponential function as a sum over the roots of the Riemann zeta function. We then give explicit bounds for the error obtained when restricting the occurring sum to a finite number of zeros.
Simple Recurrent Neural Networks is all we need for clinical events predictions using EHR data
Creators: name: Rasmy, Laila
name: Zhu, Jie
name: Li, Zhiheng
name: Hao, Xin
name: Tran, Hong Thoai
name: Zhou, Yujia
name: Tiryaki, Firat
name: Xiang, Yang
name: Xu, Hua
name: Zhi, Degui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Recently, there is great interest to investigate the application of deep learning models for the prediction of clinical events using electronic health records (EHR) data. In EHR data, a patient's history is often represented as a sequence of visits, and each visit contains multiple events. As a result, deep learning models developed for sequence modeling, like recurrent neural networks (RNNs) are common architecture for EHR-based clinical events predictive models. While a large variety of RNN models were proposed in the literature, it is unclear if complex architecture innovations will offer superior predictive performance. In order to move this field forward, a rigorous evaluation of various methods is needed. In this study, we conducted a thorough benchmark of RNN architectures in modeling EHR data. We used two prediction tasks: the risk for developing heart failure and the risk of early readmission for inpatient hospitalization. We found that simple gated RNN models, including GRUs and LSTMs, often offer competitive results when properly tuned with Bayesian Optimization, which is in line with similar to findings in the natural language processing (NLP) domain. For reproducibility, Our codebase is shared at https://github.com/ZhiGroup/pytorch_ehr.
description: This podium abstract was peer-reviewed and accepted in 2018, and presented at Medinfo-2019 in Leon France in August 2019
Classificazione a faccette di obiettivi formativi dell’insegnamento universitario, nelle discipline umanistiche in Austria, Germania, Italia e Regno Unito
Faceted classification of learning objectives in higher education
Creators: name: De Santis, Barbara <1980>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: L-LIN/02 Didattica delle lingue moderne

description: Il processo di riforma a carattere europeo che ha condotto alla nascita di uno Spazio Europeo dell’Istruzione Superiore ha conosciuto diverse tappe fondamentali, fra cui, per esempio, la ripartizione in cicli e l’adozione dei crediti ECTS. Una di queste tappe, ossia il passaggio da una pianificazione della didattica basata sui contenuti ad una basata sui risultati dell’apprendimento, ricopre un ruolo di primo piano nel presente progetto di dottorato. Lo studio qui descritto ha esaminato, da un punto di vista sintattico e semantico, un campione di obiettivi e risultati dell’apprendimento di insegnamenti di alcuni corsi di laurea di primo e secondo ciclo, delle scienze umanistiche, in Austria, Germania, Italia e Regno Unito. L’obiettivo del progetto è proporre uno schema per una classificazione a faccette di obiettivi dell’apprendimento denominato FLOC. Tale schema è adottato per classificare gli obiettivi dell’apprendimento di quattro contesti linguistico-culturali (nei paesi summenzionati), dando vita a FLOC-AT, FLOC-DE, FLOC-IT e FLOC-EN. Queste quattro classificazioni forniscono inoltre il contesto per un’analisi contrastiva multilingue fra unità di obiettivi di apprendimento.
description: As part of the transition to a student-centred approach in higher education, in the EHEA, programmes and curricula are now expressed not only in terms of course content, but also of learning objectives, learning outcomes and developed competences. In the framework of this study learning objectives and learning outcomes describing learning units (in a number of master and bachelor degree programmes) have been structurally and semantically studied, in order to outline the features of a pilot classification of learning objectives. The research project described in this work suggests a faceted classification scheme of learning objectives (FLOC, Faceted Classification of Learning Objectives). FLOC is tested out in four different linguistic and cultural contexts in which units of learning objectives from disciplines of the humanities – in Austria, Germany, Italy and the United Kingdom – are classified according to a common scheme. The resulting four classifications – FLOC-AT, FLOC-DE, FLOC-IT and FLOC-EN – provide also the context for a contrastive multilingual analysis.
Hadronic quarkonium decays at order v^7
Creators: name: Brambilla, Nora
name: Mereghetti, Emanuele
name: Vairo, Antonio
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the complete imaginary part of the NRQCD Lagrangian at order 1/M^4 in the heavy-quark mass expansion, which includes center of mass operators, and at order alpha_s^2 in the matching coefficients. We also compute the imaginary part of the NRQCD Lagrangian at order 1/M^6 and at order alpha_s^2 that contributes to the S-wave and P-wave inclusive decay widths of heavy quarkonium into light hadrons at order v^7 in the heavy-quark velocity expansion. If we count alpha_s(M) ~ v^2, the calculation provides the complete next-to-leading order corrections to the P-wave hadronic widths, and in the original NRQCD power counting, the complete next-to-leading order corrections to the vector S-wave widths, and part of the next-to-next-to leading order corrections to the pseudoscalar S-wave widths. In the S-wave case, we confirm previous findings and add new terms in a more conservative power counting. In the P-wave case, our results are in disagreement with previous ones. Constraints induced by Poincare' invariance on the NRQCD four-fermion sector are studied for the first time and provide an additional check of the calculation. Perspectives for phenomenological applications are discussed.
description: Eq. (A.1) corrected, rest of the paper unchanged
Klon af Forbrugsundersøgelsen
Creators: Danmarks Statistik
Publisher: name: Rigsarkivet
Year: 2022

description: Formålet med forbrugsundersøgelsen er at belyse de private husstandes samlede økonomiske forhold, såvel indkomster, opsparing som forbrug. Den har karakter af at være både en levevilkårsbelysende statistik og en økonomisk statistik.
Optimal version of the Picard-Lindelöf theorem
Creators: name: Schlage-Puchta, Jan-Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 34A12

description: Consider the differential equation $y'=F(x,y)$. We determine the weakest possible upper bound on $|F(x,y)-F(x,z)|$ which guarantees that this equation has for all initial values a unique solution, which exists globally.
Probing interaction and spatial curvature in the holographic dark energy model
Creators: name: Li, Miao
name: Li, Xiao-Dong
name: Wang, Shuang
name: Wang, Yi
name: Zhang, Xin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we place observational constraints on the interaction and spatial curvature in the holographic dark energy model. We consider three kinds of phenomenological interactions between holographic dark energy and matter, i.e., the interaction term $Q$ is proportional to the energy densities of dark energy ($ρ_Λ$), matter ($ρ_{m}$), and matter plus dark energy ($ρ_m+ρ_Λ$). For probing the interaction and spatial curvature in the holographic dark energy model, we use the latest observational data including the type Ia supernovae (SNIa) Constitution data, the shift parameter of the cosmic microwave background (CMB) given by the five-year Wilkinson Microwave Anisotropy Probe (WMAP5) observations, and the baryon acoustic oscillation (BAO) measurement from the Sloan Digital Sky Survey (SDSS). Our results show that the interaction and spatial curvature in the holographic dark energy model are both rather small. Besides, it is interesting to find that there exists significant degeneracy between the phenomenological interaction and the spatial curvature in the holographic dark energy model.
description: 11 pages, 5 figures; to appear in JCAP
title: Integrated Geophysical Investigation of Near-Surface Faults - Sassafras Ridge, New Madrid Seismic Zone, USA
Creators: name: Cearley, Cooper
Publisher: name: University of Kentucky Libraries
Year: 2021
Subjects: subject: FOS: Earth and related environmental sciences
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: The New Madrid Seismic Zone (NMSZ) is a large source of seismic hazard within the central and eastern United States. Seismogenic source parameters such as active fault location, slip rate, total displacement, and strain accommodation is poorly constrained due to the masking effect of the Mississippi Embayment sediment and agricultural practices on structures and surface expressions. Consequently, noninvasive geologic and geophysical investigation of the subsurface is needed to characterize seismogenic sources. Recent investigation of the Reelfoot Fault found that there is a strain accommodation enigma between the dextral offset at seismogenic depth versus the surface expression, Reelfoot Scarp. This strain imbalance was suggested to be due to a dextral shear zone from a splayed portion of the Axial Fault continuing through Reelfoot Fault to the northeast. Seismic reflection surveys collected at Sassafras Ridge, 12 km to the northeast of Reelfoot Fault, found a dextral transpressional structure in Paleozoic to Eocene horizons. This structure was suggested to be an extension of the shear zone to the northeast of Reelfoot Fault but could not satisfy temporal boundary conditions due to the lack of resolution in the upper 50 m. New, near-surface seismic reflection surveys were collected at Sassafras Ridge, targeting the basal Quaternary gravel and intra-Quaternary sediments. The resultant images showed steeply dipping northeast striking faults with vertically offset and arched Quaternary reflectors, extending within 5 m of the surface. There are five imaged transpressional faults within two zones of deformation, forming an $\sim$600 m wide flower structure, with vertical displacements of 9 m and 4 m at the top of the Quaternary basal gravel, and top of the intra-Quaternary coarse sands, respectively. The seismic images were correlated with LiDAR digital terrain analysis and an electrical resistivity survey to characterize the near-surface extent of these faults. The results suggest that the transpressional flower structure imaged across Paleozoic to Quaternary reflectors extends to the surface and is expressed as a lineament spanning the length of Sassafras Ridge observed in LiDAR slope and roughness maps. These results provide further evidence for the hypothesized shear accommodation fault across the Reelfoot Fault, as well as identifying a previously unknown Quaternary-active fault in westernmost Kentucky, northeast of the most active parts of the NMSZ.
description: © 2021 Cooper Cearley
Constrained Shortest Path Search with Graph Convolutional Neural Networks
Creators: name: Osanlou, Kevin
name: Guettier, Christophe
name: Bursuc, Andrei
name: Cazenave, Tristan
name: Jacopin, Eric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Planning for Autonomous Unmanned Ground Vehicles (AUGV) is still a challenge, especially in difficult, off-road, critical situations. Automatic planning can be used to reach mission objectives, to perform navigation or maneuvers. Most of the time, the problem consists in finding a path from a source to a destination, while satisfying some operational constraints. In a graph without negative cycles, the computation of the single-pair shortest path from a start node to an end node is solved in polynomial time. Additional constraints on the solution path can however make the problem harder to solve. This becomes the case when we need the path to pass through a few mandatory nodes without requiring a specific order of visit. The complexity grows exponentially with the number of mandatory nodes to visit. In this paper, we focus on shortest path search with mandatory nodes on a given connected graph. We propose a hybrid model that combines a constraint-based solver and a graph convolutional neural network to improve search performance. Promising results are obtained on realistic scenarios.
Enhanced electron-phonon coupling near an electronic quantum phase transition
Creators: name: Gidopoulos, Nikitas I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: I construct a simple model to demonstrate that when the many-electron quantum state of a material is near a quantum phase transition and the vibrational motion of a phonon explores the potential energy surface near the transition point, then an impenetrable barrier appears at the potential energy surface which restricts the phonon from crossing the transition point and abnormally increases the phonon frequency. The ensuing anomalous enhancement of the electron phonon coupling is general and independent of the specific nature of the electronic quantum phase transition. Understanding and modelling this strong electron-phonon coupling may potentially lead to the design of phonon superconductors with high critical temperatures by choosing their parameters appropriately near an electronic quantum phase transition.
The effect of post-harvest treatment on the rate of weight loss from tomatoes during storage
Creators: name: Risch, Eric
Publisher: name: University of British Columbia
Year: 2010

description: The moisture loss and changes in colour and firmness of tomatoes in storage were investigated using a 4x4x5 factorial experiment. The first factor selected involved four delay times after harvest, before cooling. After harvest, the tomatoes were left at room temperature for 0 hours, 10 hours, 20 hours and 30 hours, respectively, before being cooled. The second factor involved four pre-storage treatments to reduce moisture loss : (a) wrapping the individual tomatoes in polymeric film, (b) waxing the calyx or stem ends only, with a fruit wax, (c) applying wax to the whole surfaces of individual fruits, and (d) control, with no treatment. The third factor consisted of five controlled temperature and humidity storage environments : a) 10°C and 90% rh (relative humidity); b) 15°C and 88% rh; c)10°C and 60% rh; d)15°C and 50% rh; and e)18°C and 40% rh. An analysis of variance of the results showed that individually wrapping tomatoes in polymeric film resulted in the lowest rates of weight, loss during the steady state. Also the rate of weight loss from a tomato was found to be influenced by the storage condition (combination effect of temperature and humidity), and the air flow characteristics inside the storage chamber.
Stark effect in GaN/AlN nanowire heterostructures: Influence of strain relaxation and surface states
Creators: name: Camacho, D.
name: Niquet, Y. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We model the quantum confined Stark effect in AlN/GaN/AlN heterostructures grown on top of [0001]-oriented GaN nanowires. The pyro- and piezoelectric field are computed in a self-consistent approach, making no assumption about the pinning of the Fermi level, but including an explicit distribution of surface states which can act as a source or trap of carriers. We show that the pyro- and piezoelectric field bends the conduction and valence bands of GaN and AlN and transfers charges from the top surface of the nanowire to an electron gas below the heterostructure. As a consequence, the Fermi level is likely pinned near the valence band of AlN at the top surface. The electron gas and surface charges screen the electric field, thereby reducing the Stark effect. The efficient strain relaxation further weakens the piezoelectric polarization. We compute the electronic properties of the heterostructures with a sp3d5s* tight-binding model, and compare the theoretical predictions with the available experimental data.
Forbrugsundersøgelsen
Creators: Danmarks Statistik
Publisher: name: Rigsarkivet
Year: 2022

description: Formålet med forbrugsundersøgelsen er at belyse de private husstandes samlede økonomiske forhold, såvel indkomster, opsparing som forbrug. Den har karakter af at være både en levevilkårsbelysende statistik og en økonomisk statistik.
Quantum corrections to conductivity for semiconductors with various structures
Creators: name: Alavi, S. A.
name: Tatar, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the magnetic field dependences of the conductivity in heavily doped, strongly disordered 2D quantum well structures within wide conductivity and temperature ranges. We show that the exact analytical expression derived in our previous paper [1], is in better agreement than the existing equation i.e. Hikami(et.al.,) expression [2,3], with the experimental data even in low magnetic field for which the diffusion approximation is valid. On the other hand from theoretical point of view we observe that our equation is also rich because it establishes a strong relationship between quantum corrections to the conductivity and the quantum symmetry su_{q}(2). It is shown that the quantum corrections to the conductivity is the trace of Green function made by a generator of su_{q}(2)algebra. Using this fact we show that the quantum corrections to the conductivity can be expressed as a sum of an infinite number of Feynman diagrams.
description: 15 pages, 6 figures. To appear in International journal of modern physics B