cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Rectification properties of conically shaped nanopores: consequences of miniaturization
Creators: name: Pietschmann, Jan-Frederik
name: Wolfram, Marie-Therese
name: Burger, Martin
name: Trautmann, Christina
name: Nguyen, Gael
name: Pevarnik, Matthew
name: Bayer, Veronika
name: Siwy, Zuzanna
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Numerical Analysis (math.NA)
subject: Biological Physics (physics.bio-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Nanopores attracted a great deal of scientific interest as templates for biological sensors as well as model systems to understand transport phenomena at the nanoscale. The experimental and theoretical analysis of nanopores has been so far focused on understanding the effect of the pore opening diameter on ionic transport. In this article we present systematic studies on the dependence of ion transport properties on the pore length. Particular attention was given to the effect of ion current rectification exhibited for conically shaped nanopores with homogeneous surface charges. We found that reducing the length of conically shaped nanopores significantly lowered their ability to rectify ion current. However, rectification properties of short pores can be enhanced by tailoring the surface charge and the shape of the narrow opening. Furthermore we analyze the relationship of the rectification behavior and ion selectivity for different pore lengths. All simulations were performed using MsSimPore, a software package for solving the Poisson-Nernst-Planck (PNP) equations. It is based on a novel finite element solver and allows for simulations up to surface charge densities of -2 e/nm^2. MsSimPore is based on 1D reduction of the PNP model, but allows for a direct treatment of the pore with bulk electrolyte reservoirs, a feature which was previously used in higher dimensional models only. MsSimPore includes these reservoirs in the calculations; a property especially important for short pores, where the ionic concentrations and the electric potential vary strongly inside the pore as well as in the regions next to pore entrance.
Endomorphism algebras of QM abelian surfaces
Creators: name: Yu, Chia-Fu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We determine endomorphism algebras of abelian surfaces with quaternion multiplication.
description: 14 pages. Lemma 2.10 corrected
Hans Krey †
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 1 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Quantum trajectories: memory and continuous observation
Creators: name: Barchielli, A.
name: Pellegrini, C.
name: Petruccione, F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Starting from a generalization of the quantum trajectory theory (based on the stochastic Schrödinger equation - SSE), non-Markovian models of quantum dynamics are derived. In order to describe non-Markovian effects, the approach used in this article is based on the introduction of random coefficients in the usual linear SSE. A major interest is that this allows to develop a consistent theory of quantum measurement in continuous time for these non-Markovian quantum trajectory models. In this context, the notions of instrument, a priori and a posteriori states are rigorously described. The key point is that by starting from a stochastic equation on the Hilbert space of the system, we are able to respect the complete positivity of the mean dynamics for the statistical operator and the requirements of the axioms of quantum measurement theory. The flexibility of the theory is next illustrated by a concrete physical model of a noisy oscillator where non Markovian effects come from random environment, coloured noises, randomness in the stimulating light, delay effects. The statistics of the emitted photons and the heterodyne and homodyne spectra are studied and we show how these quantities are sensible to the non-Markovian features of the system dynamics, so that, in principle, the observation and analysis of the fluorescence light could reveal the presence of non-Markovian effects and allow for a measure of the spectra of the noises affecting the system dynamics.
description: 21 pages, RevTeX4-1; minor corrections
Otto Lendle, Texte und Untersuchungen zum technischen Bereich der antiken Poliorketik
Creators: name: Maier, Franz Georg
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Otto Lendle, Texte und Untersuchungen zum technischen Bereich der antiken Poliorketik. Palingenesia 19. Franz Steiner Verlag, Wiesbaden 1983. 215 Seiten, 21 Tafeln
description: Bonner Jahrbücher, Bd. 186.1986: Bonner Jahrbücher
A Lower Bound for the Discrepancy of a Random Point Set
Creators: name: Doerr, Benjamin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Numerical Analysis (math.NA)
subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 11K38, 60C05, 65C05

description: We show that there is a constant $K > 0$ such that for all $N, s \in \N$, $s \le N$, the point set consisting of $N$ points chosen uniformly at random in the $s$-dimensional unit cube $[0,1]^s$ with probability at least $1-\exp(-Θ(s))$ admits an axis parallel rectangle $[0,x] \subseteq [0,1]^s$ containing $K \sqrt{sN}$ points more than expected. Consequently, the expected star discrepancy of a random point set is of order $\sqrt{s/N}$.
description: 7 pages
Moduli Stabilization in a de Sitter Compactification Model
Creators: name: Flachi, Antonino
name: Minamitsuji, Masato
name: Uzawa, Kunihito
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss the moduli stabilization in a de Sitter compactification model obtained coupling D-dimensional gravity to scalar and gauge fields. This class of models is characterized by two moduli: one related to the volume of the internal space, the other to the warp factor. While the volume modulus can be fixed by appropriately tuning the gauge field strength, curvature of the internal space, and cosmological constant, the same mechanism does not work for the warp modulus. In this paper we discuss a stabilization mechanism based on quantum effects and show that both moduli can be efficiently stabilized.
description: 26 pages, 8 figures, Journal version
A comparative method of viral and neural marketing, with a modern marketing approach
Creators: name: Safaei, Mehdi
Publisher: name: figshare
Year: 2021
Subjects: subject: 140209 Industry Economics and Industrial Organisation
subject: FOS: Economics and business

description: In today's competitive world, marketing as a dynamic, operational science is constantly evolving in line with developments. The critical role and importance of marketing strategies in the success or failure of organizations have become clear to everyone. Marketing and its strategies have been heavily influenced by technologies throughout their lives. With the advent of print, radio, television, computers, and so on, marketing has also played a specific role. The advent of information technology and the rapid growth of communications in cyberspace have completely revolutionized marketing strategies. In the meantime, in order to make companies successful in marketing, different strategies were introduced. The purpose of this study is to provide a comprehensive overview of Neuro-marketing and Viral-marketing while exploring the different aspects of these two marketing styles. Finally, according to the indices and characteristics obtained through field studies and library research, these two types of marketing will be analyzed. On the other hand, the role of the five senses (sight, hearing, smell, touch, and taste) in neural marketing will be examined. And it examines how each of these senses affects the customer's mood and overshadows his purchase. This will help sellers and marketers a lot more sales. The results suggest that the strategic stimulation of the consumer's five senses in the marketing process can be one of the practical ways for companies and sellers to attract customers and increase their loyalty.
Superfluidity of Bosons in Kagome Lattices with Frustration
Creators: name: You, Yi-Zhuang
name: Chen, Zhu
name: Sun, Xiao-Qi
name: Zhai, Hui
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this letter we consider spinless bosons in a Kagome lattice with nearest-neighbor hopping and on-site interaction, and the sign of hopping is inverted by insetting a π flux in each triangle of Kagome lattice so that the lowest single particle band is perfectly flat. We show that in the high density limit, despite of the infinite degeneracy of the single particle ground states, interaction will select out the Bloch state at the K point of Brillouin zone for boson condensation at the lowest temperature. As temperature increases, the single boson superfluid order can be easily destroyed, while an exotic triple-boson paired superfluid order will remain. We establish that this trion superfluid exists in a broad temperature regime until the temperature is increased to the same order of hopping and then the system turns into normal phases. Finally we show that time of flight measurement of momentum distribution and its noise correlation can be used to distinguish these three phases.
description: 4 pages + references, 5 figures
Deliverables of Codes4strains project (Part1)
Creators: name: Melanie, Hennart
name: Sylvain, Brisse
Publisher: name: Zenodo
Year: 2021
Subjects: Klebsiella pneumoniae
Escherichia coli
genomic classification
strain nomenclature

description: Background One of the main objectives of the PhD project is to develop a novel nomenclature system, potentially applicable to all bacterial pathogens. Here we first focus is on a highly antibiotic resistant bacterial pathogen, K. pneumoniae (Kp), and on a foodborne bacterial pathogen, Escherichia coli (Ec). The aim is to combine two main microbial strain nomenclatures approaches that are currently being used separately. (further details: https://onehealthejp.eu/codes4strains/) Deliverables D-PhD16-2.1: Pilot Genome set D-PhD16-3.1: cgMLST schemes for Kp and Ec D-PhD16-3.3: SNapperDB Ec analysed for full dataset
A note on the front spinning construction
Creators: name: Golovko, Roman
Publisher: name: arXiv
Year: 2012
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: In this paper we introduce a notion of front S^m-spinning for Legendrian submanifolds of R^{2n+1}. It generalizes the notion of front S^1-spinning which was invented by Ekholm, Etnyre and Sullivan. We use it to prove that there are infinitely many pairs of exact Lagrangian cobordant and not pairwise Legendrian isotopic Legendrian S^1 x S^{i_1} x ... x S^{i_k} in the standard contact Euclidean space which have the same classical invariants if one of i_j's is odd.
description: 12 pages, 1 figure; some minor changes. This version has been accepted for publication in the the Bulletin of the London Mathematical Society
Dimensional dependence of the Stokes--Einstein relation and its violation
Creators: name: Charbonneau, Benoit
name: Charbonneau, Patrick
name: Jin, Yuliang
name: Parisi, Giorgio
name: Zamponi, Francesco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We generalize to higher spatial dimensions the Stokes--Einstein relation (SER) and the leading correction to diffusivity in periodic systems, and validate them using numerical simulations. Using these results, we investigate the evolution of the SER violation with dimension in simple hard sphere glass formers. The analysis suggests that the SER violation disappears around dimension d=8, above which SER is not violated. The critical exponent associated to the violation appears to evolve linearly in 8-d below d=8, as predicted by Biroli and Bouchaud [J. Phys.: Cond. Mat. 19, 205101 (2007)], but the linear coefficient is not consistent with their prediction. The SER violation evolution with d establishes a new benchmark for theory, and a complete description remains an open problem.
description: 20 pages, 10 figures
Report on user requirements, existing tools and infrastructure
Creators: name: Robin, Cosma
name: Benekos, Ioannis
name: Gharrad, Hanna
name: Maruntelu Nicolae
name: Besson, Philippe
name: Andriciuc Radu
name: Ferner, Pia
name: Panunzi, Simona
name: Giraldi, Laura
name: Scheuer, Sabrina
name: Babagiannou, Rosanna
Publisher: name: Zenodo
Year: 2020
Subjects: search and Rescue
user requirements
Emergency Management

description: Due to climate change and the development of high-risk industrial technologies, European countries are facing a high magnitude and frequency of natural or industrial disasters. Therefore, challenges experienced by staff and state and private structures working in the field of R&D are constantly diversifying.
 The main objective of this task is to gather information on existing technologies used in SAR operations relevant to the location of entrapped victims; the identification of limitations and gaps, as well as of future needs. Benchmarking of available commercial products will also be included.
 The need for equipment to ensure the protection of First Responders against the possible effects of a disaster and the use of technologies that significantly increase the probability of survival of the victims in the search-rescue process have been addressed in chapter 3.
 Information was collected from 82 questionnaires completed by users (civil protection authorities) and project partners, including private companies and volunteer associations working in the field of R&D. There have been a number of limitations and gaps in existing SAR technology on the market, including proposals to modernise it or design new technologies. In the same direction, the information obtained through questionnaires allowed, in chapter 4, the benchmarking of available commercial products. The conclusions underline the need for technological improvements in the field of R&D, as the best solution for an optimal cost-benefit ratio. New SAR technologies must add value to SAR actions, being able to address the requirements of users, for each type of technique, on the achievement of improvements in the following KPIs: ergonomic, power supply, size, weight, user interface characteristics, portability, sensitivity, low LODs, robustness, and maintenance.
 Based on this knowledge we discussed the most important technical features for the design of a general collective protective system. However, we must keep in mind that for different applications we can find numerous variations and that a process of design sophistication is needed if we want to address users' needs in the best possible way. However, for the future, we can expect progress in the following areas: Standardisation of equipment; Fielding of technology improvements.
 Hence the conclusion is that it is indeed useful to conduct research in the directions brought forward by users of SAR technology.
Goldschmiedekunst des 18.Jh. in Augsburg und München
Creators: name: Ress, Anton
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 5 Nr. 8 (1952): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
New methods to bound the critical probability in fractal percolation
Creators: name: Don, Henk
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G22

description: Fractal percolation has been introduced by Mandelbrot in 1974. We study the two-dimensional case, with integer subdivision index M and survival probability p. It is well known that there exists a non-trivial critical value p_c(M) such that a.s. the largest connected component in the limiting set K is a point for p 0.881 and p_c(3)>0.784. For the upper bounds, we introduce the idea of classifications. The fractal percolation iteration process now induces an iterative random process on a finite alphabet, which is easier to analyze than the original process. This theoretical framework is the basis of computer aided proofs for the following upper bounds: p_c(2)<0.993, p_c(3)<0.940 and p_c(4)<0.972.
description: 22 pages, 5 figures
Positive Least Energy Solutions and Phase Separation for Coupled Schrodinger Equations with Critical Exponent: Higher Dimensional Case
Creators: name: Chen, Zhijie
name: Zou, Wenming
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study the following nonlinear Schrödinger system which is related to Bose-Einstein condensate: {displaymath} {cases}-Δu +\la_1 u = μ_1 u^{2^\ast-1}+βu^{\frac{2^\ast}{2}-1}v^{\frac{2^\ast}{2}}, \quad x\in Ω, -Δv +\la_2 v =μ_2 v^{2^\ast-1}+βv^{\frac{2^\ast}{2}-1} u^{\frac{2^\ast}{2}}, \quad x\in \om, u\ge 0, v\ge 0 \,\,\hbox{in $\om$},\quad u=v=0 \,\,\hbox{on $\partial\om$}.{cases}{displaymath} Here $\om\subset \R^N$ is a smooth bounded domain, $2^\ast:=\frac{2N}{N-2}$ is the Sobolev critical exponent, $-\la_1(\om)0$ and $β\neq 0$, where $λ_1(\om)$ is the first eigenvalue of $-Δ$ with the Dirichlet boundary condition. When $\bb=0$, this is just the well-known Brezis-Nirenberg problem. The special case N=4 was studied by the authors in (Arch. Ration. Mech. Anal. 205: 515-551, 2012). In this paper we consider {\it the higher dimensional case $N\ge 5$}. It is interesting that we can prove the existence of a positive least energy solution $(u_\bb, v_\bb)$ {\it for any $β\neq 0$} (which can not hold in the special case N=4). We also study the limit behavior of $(u_\bb, v_\bb)$ as $β\to -\infty$ and phase separation is expected. In particular, $u_\bb-v_\bb$ will converge to {\it sign-changing solutions} of the Brezis-Nirenberg problem, provided $N\ge 6$. In case $\la_1=\la_2$, the classification of the least energy solutions is also studied. It turns out that some quite different phenomena appear comparing to the special case N=4.
description: 48 pages. This is a revised version of arXiv:1209.2522v1 [math.AP]
Mechanical and interfacial characterisation of leading-edge protection materials for wind turbine blade applications
Creators: name: Katsivalis, Ioannis
name: Chanteli, Angeliki
name: Finnegan, William
name: YOUNG, TREVOR
Publisher: name: University of Limerick
Year: 2023
Subjects: Engineering

description: Modern wind turbine blades experience tip speeds that can exceed 110 m/s. At such speeds, water droplet impacts can cause erosion of the leading edge, which can have a detrimental effect on the performance of the wind turbine blade. More specifically, rain erosion is leading to both reduced efficiency and increased repair costs. The industry is using polymeric coatings—leading-edge protection (LEP) materials—to protect the blades but those are also prone to rain erosion. In this work, LEP materials that are currently used by the industry for the protection of wind turbine blades were selected and their performance assessed. The LEP materials were characterised in terms of mechanical properties by using different experimental methods, and they were also assessed in terms of durability by performing rain erosion testing (RET). Finally, the damage and failure mechanisms observed were further investigated using CT scanning. This paper provides an insight to the properties of LEP materials, their durability, and the damage and failure mechanisms they experienced during rain erosion.
Flavor-Tuned 125 GeV SUSY Higgs Boson at the LHC: MSSM and NATURAL SUSY TESTS
Creators: name: Barger, Vernon
name: Huang, Peisi
name: Ishida, Muneyuki
name: Keung, Wai-Yee
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We show that an enhanced two-photon signal of the Higgs boson, h, observed with 125 GeV mass by the ATLAS and CMS collaborations, can be obtained if it is identified principally with the neutral $H_u^0$ of the two Higgs doublets of minimal Supersymmetry. We focus on sparticles and the pseudoscalar Higgs $A$ at the TeV scale. The off-diagonal element of the (Hu0,Hd0) mass matrix in the flavor basis must be suppressed, and this requires both a large Higgsino mass parameter, mu \sim TeV, and large tan beta. A MSSM sum rule is derived that relates gamma gamma and bb rates, and the gamma gamma enhancement predicts the bb reduction. On the contrary, Natural SUSY requires | mu | < 0.5 TeV, for which gamma gamma is reduced and $b\bar b$ is enhanced. This conclusion is independent of the mA-value and the SUSY quantum correction Deltab. Relative tau tau to bb rates are sensitive to Deltab.
description: 10 pages 2 figures, to be published in Phys. Rev. D
Principal data and analysis code from Riihelä et al (2021): Antarctic sea ice loss drives cryospheric radiative feedback strengthening in recent years, submitted to Nature Geoscience, 2021
Creators: name: Riihelä, Aku
name: Bright, Ryan M.
name: Anttila, Kati
Publisher: name: https://b2share.eudat.eu
Year: 2021
Subjects: 3.3 → Natural sciences → Earth sciences
cryospheric radiative feedback
climate feedbacks
surface albedo
radiative kernel applications

description: This entry contains the principal data of the associated publication - the annual global mean radiative feedbacks resulting from surface albedo changes over both polar regions (poleward of 50 degrees latitude). Data are available based on CLARA-A2.1 surface albedo data record combined with two radiative kernels; CloudSat-CALIPSO (CC) and CERES-based albedo change kernel (CACK). Upper and lower limits of estimated radiative feedback uncertainty envelopes are provided in the data file. The entry also provides the principal python codes used in the study. These codes are provided as-is.
Lattice QCD signal for a bottom-bottom tetraquark
Creators: name: Bicudo, Pedro
name: Wagner, Marc
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Utilizing lattice QCD results for the potential of two static antiquarks and two dynamical quarks as well as quark model techniques for the dynamics of two heavy antiquarks in a cloud of two light quarks, we are provided with an accurate framework for the study of possibly existing heavy-heavy-light-light tetraquarks. Among the possible quantum numbers of such a system, we find binding in only one channel, the scalar isosinglet. Solving the Schroedinger equation for the displacement of the heavy antiquarks and taking systematic errors into account, we find an antibottom-antibottom-light-light bound state with a confidence level of around 1.8 sigma ... 3.0 sigma and binding energy of approximately 30 MeV ... 57 MeV.
description: 7 pages, 3 figures; significantly extended version
Spin-orbit-coupling induced domain-wall resistance in diffusive ferromagnets
Creators: name: Yuan, Zhe
name: Liu, Yi
name: Starikov, Anton A.
name: Kelly, Paul J.
name: Brataas, Arne
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate diffusive transport through a number of domain wall (DW) profiles of the important magnetic alloy Permalloy taking into account simultaneously noncollinearity, alloy disorder, and spin-orbit coupling fully quantum mechanically, from first principles. In addition to observing the known effects of magnetization mistracking and anisotropic magnetoresistance, we discover a not-previously identified contribution to the resistance of a DW that comes from spin-orbit-coupling-mediated spin-flip scattering in a textured diffusive ferromagnet. This adiabatic DW resistance, which should exist in all diffusive DWs, can be observed by varying the DW width in a systematic fashion in suitably designed nanowires.
description: 5 pages, 4 figures
Barbara Schmidt-Dounas, Der Lykische Sarkophag aus Sidon
Creators: name: Fleischer, Robert
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Barbara Schmidt-Dounas, Der Lykische Sarkophag aus Sidon. Istanbuler Mitteilungen Beiheft 30. Verlag Ernst Wasmuth, Tübingen 1985. 172 Seiten mit 2 Abbildungen, 24 Tafeln
description: Bonner Jahrbücher, Bd. 186.1986: Bonner Jahrbücher
Adiabatic quantum computation with Rydberg-dressed atoms
Creators: name: Keating, Tyler
name: Goyal, Krittika
name: Jau, Yuan-Yu
name: Biedermann, Grant W.
name: Landahl, Andrew
name: Deutsch, Ivan H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study an architecture for implementing adiabatic quantum computation with trapped neutral atoms. Ground state atoms are dressed by laser fields in a manner conditional on the Rydberg blockade mechanism, thereby providing the requisite entangling interactions. As a benchmark we study the performance of a Quadratic Unconstrained Binary Optimization (QUBO) problem whose solution is found in the ground state spin configuration of an Ising-like model. We model a realistic architecture, including details of the atomic implementation, with qubits encoded into the clock states of 133Cs, effective B-fields implemented through stimulated Raman transitions, and atom-atom coupling achieved by excitation to the 100P3/2 Rydberg level. Including the fundamental effects of photon scattering, we find the fidelity of two-qubit implementation to be on the order of 0.99, with higher fidelities possible with improved laser sources.
description: 5 pages, 3 figures
Sandor Bökönyi, Animal Husbandry and Hunting in Tác-Gorsium
Creators: name: Nobis, Günter
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Sandor Bökönyi, Animal Husbandry and Hunting in Tác-Gorsium. The Vertebrate Fauna of a Roman Town in Pannonia. Studia Archaeologica 8. Akademiai Kiadö, Budapest 1984. 238 Seiten, 50 Abbildungen, zahlreiche Tabellen.
description: Bonner Jahrbücher, Bd. 186.1986: Bonner Jahrbücher
Confinement and Dynamical Symmetry Breaking in non-SUSY Gauge Theory from S-duality in String Theory
Creators: name: Sugimoto, Shigeki
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss an attempt to understand confinement and dynamical symmetry breaking in a 4-dimensional non-supersymmetric gauge theory using S-duality in type IIB string theory. The electric theory is a USp(2n) gauge theory and its magnetic dual is argued to be an SO(2n) or SO(2n-1) gauge theory. These theories are obtained as the low-energy effective theory of O3-D3bar systems in type IIB string theory, which are related by S-duality. Confinement and dynamical symmetry breaking in the USp(2n) gauge theory are caused by the condensation of scalar fields in the magnetic dual description, which is consistent with the scenario of the dual Meissner mechanism for the confinement.
description: 41 pages, v2: minor corrections, version published in PTP
title: Kid-1, a putative renal transcription factor: regulation during ontogeny and in response to ischemia and toxic injury
Creators: name: Witzgall, Ralph
name: O'Leary, Eileen
name: Gessner, Reinhard
name: Ouellette, Andre J.
name: Bonventre, Joseph V.
Publisher: name: Universität Regensburg
Year: 1993
Subjects: subject: 330 Wirtschaft
subject: 610 Medizin

description: We have identified a new putative transcription factor from the rat kidney, termed Kid-1 (for kidney, ischemia and developmentally regulated gene 1). Kid-1 belongs to the C2H2 class of zinc finger genes. Its mRNA accumulates with age in postnatal renal development and is detected predominantly in the kidney. Kid-1 mRNA levels decline after renal injury secondary to ischemia or folic acid administration, two insults which result in epithelial cell dedifferentiation, followed by regenerative hyperplasia and differentiation. The low expression of Kid-1 early in postnatal development, and when renal tissue is recovering after injury, suggests that the gene product is involved in establishment of a differentiated phenotype and/or regulation of the proliferative response. The deduced protein contains 13 C2H2 zinc fingers at the COOH end in groups of 4 and 9 separated by a 32-amino-acid spacer. There are consensus sites for phosphorylation in the NH2 terminus non-zinc finger region as well as in the spacer region between zinc fingers 4 and 5. A region of the deduced protein shares extensive homology with a catalytic region of Raf kinases, a feature shared only with TFIIE among transcription factors. To determine whether Kid-1 can modulate transcription, a chimeric construct encoding the Kid-1 non-zinc finger region (sense or antisense) and the DNA-binding region of GAL4 was transfected into COS and LLC-PK1 cells together with a chloramphenicol acetyltransferase (CAT) reporter plasmid containing GAL4 binding sites, driven by either a minimal promoter or a simian virus 40 enhancer. CAT activity was markedly inhibited in cells transfected with the sense construct compared with the activity in cells transfected with the antisense construct. To our knowledge, this pattern of developmental regulation, kidney expression, and regulation of transcription is unique among the C2H2 class of zinc finger-containing DNA-binding proteins.
Semi-Quantitative Group Testing: A Unifying Framework for Group Testing with Applications in Genotyping
Creators: name: Emad, Amin
name: Milenkovic, Olgica
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We propose a novel group testing method, termed semi-quantitative group testing, motivated by a class of problems arising in genome screening experiments. Semi-quantitative group testing (SQGT) is a (possibly) non-binary pooling scheme that may be viewed as a concatenation of an adder channel and an integer-valued quantizer. In its full generality, SQGT may be viewed as a unifying framework for group testing, in the sense that most group testing models are special instances of SQGT. For the new testing scheme, we define the notion of SQ-disjunct and SQ-separable codes, representing generalizations of classical disjunct and separable codes. We describe several combinatorial and probabilistic constructions for such codes. While for most of these constructions we assume that the number of defectives is much smaller than total number of test subjects, we also consider the case in which there is no restriction on the number of defectives and they may be as large as the total number of subjects. For the codes constructed in this paper, we describe a number of efficient decoding algorithms. In addition, we describe a belief propagation decoder for sparse SQGT codes for which no other efficient decoder is currently known. Finally, we define the notion of capacity of SQGT and evaluate it for some special choices of parameters using information theoretic methods.
VQR: dalla valutazione della ricerca alla scienza aperta
Creators: name: CELLETTI, ALESSANDRA
Publisher: name: Genoa University
Year: 2023

description: Presentazione su invito tenuta alla GenOA Week 2023 nella sessione "Valutazione della ricerca"
Abstract dell'autrice:
Nel luglio 2022 ANVUR ha terminato i lavori della terza Valutazione Italiana della Qualità della Ricerca, denominata VQR, riferita al periodo 2015-2019. Entro ottobre 2023 verrà pubblicato il bando della nuova VQR riferita al periodo 2020-2024.  
La VQR ha lo scopo di valutare i risultati della ricerca scientifica delle Istituzioni italiane e le relative suddivisioni interne (Dipartimenti e strutture analoghe). L'esercizio è finalizzato anche a valutare le attività della Terza Missione. In questo contesto, presenteremo alcuni risultati raccolti durante la VQR 2015-2019, riguardanti la valutazione e la scienza aperta, con particolare riferimento all'aspetto multi-dimensionalità della valutazione, all'uso degli indicatori nel processo di valutazione, gli articoli disponibili in libero accesso.
Emergent Spin Excitations in a Bethe Lattice at Percolation
Creators: name: Changlani, Hitesh J.
name: Ghosh, Shivam
name: Pujari, Sumiran
name: Henley, Christopher L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the spin 1/2 quantum Heisenberg antiferromagnet on a Bethe lattice diluted to the percolation threshold. Dilution creates areas of even/odd sublattice imbalance resulting in "dangling spins" (L. Wang and A. W. Sandvik, Phys. Rev. Lett. 97, 117204 (2006); Phys. Rev. B 81, 054417 (2010)). These collectively act as "emergent" spin 1/2 degrees of freedom and are responsible for the creation of a set of low lying "quasidegenerate states". Using Density Matrix Renormalization Group (DMRG) calculations, we detect the presence and location of these emergent spins. We find an effective Hamiltonian of these emergent spins, with Heisenberg interactions that decay exponentially with the distance between them.
description: 4+ pages, 3 figures
Cascaded two-photon nonlinearity in a one-dimensional waveguide with multiple two-level emitters
Creators: name: Roy, Dibyendu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We propose and theoretically investigate a model to realize cascaded optical nonlinearity with few atoms and photons in one-dimension (1D). The optical nonlinearity in our system is mediated by resonant interactions of photons with two-level emitters, such as atoms or quantum dots in a 1D photonic waveguide. Multi-photon transmission in the waveguide is nonreciprocal when the emitters have different transition energies. Our theory provides a clear physical understanding of the origin of nonreciprocity in the presence of cascaded nonlinearity. We show how various two-photon nonlinear effects including spatial attraction and repulsion between photons, background fluorescence can be tuned by changing the number of emitters and the coupling between emitters (controlled by the separation).
description: 6 pages, 4 figures
"Archeologia e Calcolatori": un esempio virtuoso di Diamond OA nella politica editoriale dell'Istituto di Scienze del Patrimonio Culturale del CNR
Creators: name: Caravale, Alessandra
name: MOSCATI, PAOLA
name: BUSCEMI, Francesca
name: FIORINO, SALVATORE
name: Paraciani, Nicolò
name: PIERGROSSI, ALESSANDRA
name: Rossi, Irene
name: Schwarz-Ricci, Vera Isabell
Publisher: name: Genoa University
Year: 2023

description: Presentazione su call tenuta alla GenOA Week 2023 nella sessione "Comunicazione scientifica e open access 1."
Abstract degli autori:
Il Laboratorio "Open Data, Open Knowledge, Open Science" dell'ISPC, che comprende un gruppo di lavoro interdisciplinare costituito da archeologi, filologi, matematici e informatici, promuove tecnologie di gestione ed elaborazione delle informazioni per favorire la fruizione di collezioni di dati in ambiente digitale e in modalità open access. L'attività di ricerca si orienta verso la costituzione e l'analisi di risorse elettroniche per l'archeologia e per le scienze dell'antichità, distribuite in rete mediante formati di metadati standard e archiviate in repository open access, per facilitarne lo studio attraverso strumenti di Data Analysis e la pubblicazione come Linked Open Data. Il background di riferimento è costituito dall'esperienza pionieristica della rivista Archeologia e Calcolatori, che dal 2005 ha aderito all'Open Archives Initiative, secondo la modalità oggi definita "Diamond Open Access", affiancando al suo ruolo di osservatorio internazionale degli sviluppi dell'informatica archeologica un diretto impegno sperimentale per la diffusione di contenuti scientifici in rete. Il repository della rivista, conforme al protocollo OAI-PMH, contiene più di 1200 record di risorse testuali, disponibili per la consultazione anche attraverso il sito web della rivista (http://www.archcalc.cnr.it/). Inoltre, l'atlante digitale di immagini IADI (https://iadi.archcalc.cnr.it/) consente di fruire in open access le oltre 5000 immagini riferite alla produzione pluritrentennale della rivista, anch'esse strutturate in un repository pubblico. Oltre all'archiviazione presso repository istituzionali (ad es. la banca dati SOLAR del CNR), la rivista contribuisce oggi a infrastrutture di aggregazione di contenuti digitali come CulturaItalia ed Europeana. Tra le attività di ricerca si segnala l'archiviazione, tramite opportune operazioni di mappatura dei metadati, delle risorse di Archeologia e Calcolatori e di altre collezioni di dati digitali all'interno di OpenAIRE e dell'infrastruttura di ricerca paneuropea E-RIHS, il cui nodo italiano partecipa al progetto PNRR H2IOSC (Humanities and cultural Heritage Open Science Cloud). Grazie al lungo impegno nella diffusione della cultura scientifica e nella promozione del diamond open access, il gruppo di ricerca è responsabile dell'ISPC Open Portal (https://openportal.ispc.cnr.it/), una piattaforma per raccogliere ed esporre la produzione scientifica dell'Istituto di Scienze del Patrimonio Culturale.
Exact solution of a variety of X-ray probes in the Falicov-Kimball model with dynamical mean-field theory
Creators: name: Shvaika, A. M.
name: Freericks, J. K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We examine core-level X-ray photoemission spectroscopy (XPS), X-ray absorption near-edge spectroscopy (XANES) and X-ray emission spectroscopy (XES) in the Falicov-Kimball model by using the exact solution from dynamical mean-field theory. XPS measures the core-hole propagator, XANES measures the absorption of X-rays when the core electron is excited to an unoccupied electronic state of the solid, and not emitted, and XES measures the spectra of light emitted as electrons fill the core-hole state created via some form of X-ray excitation. These three spectra are closely related to one another and display orthogonality catastrophe behavior at T=0. We illustrate how to evaluate these spectra efficiently at finite temperature, with a primary focus on the details of XANES.
description: 10 pages, 4 figures, contribution to the proceedings of the 4th Conference "Statistical Physics: Modern Trends and Applications", July 3-6, 2012, Lviv, Ukraine
Exchange interactions and local moment fluctuation corrections in ferromagnets at finite temperatures based on non-collinear density-functional calculations
Creators: name: Lezaic, Marjana
name: Mavropoulos, Phivos
name: Bihlmayer, Gustav
name: Blügel, Stefan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We explore the derivation of interatomic exchange interactions in ferromagnets within density-functional theory (DFT) and the mapping of DFT results onto a spin Hamiltonian. We delve into the problem of systems comprising atoms with strong spontaneous moments together with atoms with weak induced moments. All moments are considered as degrees of freedom, with the strong moments thermally fluctuating only in angle and the weak moments thermally fluctuating in angle and magnitude. We argue that a quadratic dependence of the energy on the weak local moments magnitude, which is a good approximation in many cases, allows for an elimination of the weak-moment degrees of freedom from the thermodynamic expressions in favor of a renormalization of the Heisenberg interactions among the strong moments. We show that the renormalization is valid at all temperatures accounting for the thermal fluctuations and resulting in temperature-independent renormalized interactions. These are shown to be the ones directly derived from total-energy DFT calculations by constraining the strong-moment directions, as is done e.g. in spin-spiral methods. We furthermore prove that within this framework the thermodynamics of the weak-moment subsystem, and in particular all correlation functions, can be derived as polynomials of the correlation functions of the strong-moment subsystem with coefficients that depend on the spin susceptibility and that can be calculated within DFT. These conclusions are rigorous under certain physical assumptions on the measure in the magnetic phase space. We implement the scheme in the full-potential linearized augmented plane wave method using the concept of spin-spiral states, considering applicable symmetry relations and the use of the magnetic force theorem. Our analytical results are corroborated by numerical calculations employing DFT and a Monte Carlo method.
description: Revised version (21 pages) includes more citations and a few more results. Title and abstract are changed
Spin torque antiferromagnetic nanooscillator in the presence of magnetic noise
Creators: name: Gomonay, Helen
name: Loktev, Vadim
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin-torque effects in antiferromagnetic (AFM) materials are of great interest due to the possible applications as high-speed spintronic devices. In the present paper we analyze the statistical properties of the current-driven AFM nanooscillator that result from the white Gaussian noise of magnetic nature. According to the peculiarities of deterministic dynamics, we derive the Langevin and Fokker-Planck equations in the energy representation of two normal modes. We find the stationary distribution function in the subcritical and overcritical regimes and calculate the current dependence of the average energy, energy fluctuation and their ratio (quality factor). The noncritical mode shows the Boltzmann statistics with the current-dependent effective temperature in the whole range of the current values. The effective temperature of the other, i.e., soft, mode critically depends on the current in the subcritical region. Distribution function of the soft mode follows the Gaussian law above the generation threshold. In the overcritical regime, the total average energy and the quality factor grow with the current value. This raises the AFM nanooscillators to the promising candidates for active spintronic components.
description: 9 pages, 4 figures, Presented at the 4-th StatPhys Conference, Lviv, Ukraine, July 3-6, 2012, submitted to Condensed Matter Physics
Uncovering wind turbine properties through two-dimensional stochastic modeling of wind dynamics
Creators: name: Raischel, Frank
name: Scholz, Teresa
name: Lopes, Vitor V.
name: Lind, Pedro G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: 60Jxx

description: Using a method for stochastic data analysis, borrowed from statistical physics, we analyze synthetic data from a Markov chain model that reproduces measurements of wind speed and power production in a wind park in Portugal. We first show that our analysis retrieves indeed the power performance curve, which yields the relationship between wind speed and power production and we discuss how this procedure can be extended for extracting unknown functional relationships between pairs of physical variables in general. Second, we show how specific features, such as the rated speed of the wind turbine or the descriptive wind speed statistics, can be related with the equations describing the evolution of power production and wind speed at single wind turbines.
description: 8 figures
The q-gradient method for global optimization
Creators: name: Soterroni, Aline C.
name: Galski, Roberto L.
name: Ramos, Fernando M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: The q-gradient is an extension of the classical gradient vector based on the concept of Jackson's derivative. Here we introduce a preliminary version of the q-gradient method for unconstrained global optimization. The main idea behind our approach is the use of the negative of the q-gradient of the objective function as the search direction. In this sense, the method here proposed is a generalization of the well-known steepest descent method. The use of Jackson's derivative has shown to be an effective mechanism for escaping from local minima. The q-gradient method is complemented with strategies to generate the parameter q and to compute the step length in a way that the search process gradually shifts from global in the beginning to almost local search in the end. For testing this new approach, we considered six commonly used test functions and compared our results with three Genetic Algorithms (GAs) considered effective in optimizing multidimensional unimodal and multimodal functions. For the multimodal test functions, the q-gradient method outperformed the GAs, reaching the minimum with a better accuracy and with less function evaluations.
description: 12 pages, 1 figure
Entwicklung Einer Lda-Miniatursonde Zur Messung Der Strömungsgeschwindigkeit Und Ihrer Fluktuationen In Wasser
Creators: name: Billen, Thomas
Publisher: name: Zenodo
Year: 1988
Subjects: LDA
flow measurements
wind/wave facility

description: Diploma thesis on the development of a miniatur LDA probe to measure the flow of water and its fluctuations in a wind/water facility.
Off-diagonal Gluon Mass Generation and Infrared Abelian Dominance in Maximally Abelian Gauge in SU(3) Lattice QCD
Creators: name: Gongyo, Shinya
name: Iritani, Takumi
name: Suganuma, Hideo
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In SU(3) lattice QCD formalism, we propose a method to extract gauge fields from link-variables analytically. With this method, we perform the first study on effective mass generation of off-diagonal gluons and infrared Abelian dominance in the maximally Abelian (MA) gauge in the SU(3) case. Using SU(3) lattice QCD, we investigate the propagator and the effective mass of the gluon fields in the MA gauge with U(1)$_3 \timesU(1)_8$ Landau gauge fixing. The Monte Carlo simulation is performed on $16^4$ at $β$=5.7, 5.8 and 6.0 at the quenched level. The off-diagonal gluons behave as massive vector bosons with the approximate effective mass $M_{\mathrm{off}} \simeq 1.1-1.2\mathrm{GeV}$ in the region of $r =0.3-0.8$fm, and the propagation is limited within a short range, while the propagation of diagonal gluons remains even in a large range. In this way, infrared Abelian dominance is shown in terms of short-range propagation of off-diagonal gluons. Furthermore, we investigate the functional form of the off-diagonal gluon propagator. The functional form is well described by the four-dimensional Euclidean Yukawa-type function $e^{-m_{\rm off}r}/r$ with $m_{\rm off} \simeq 1.3-1.4\mathrm{GeV}$ for $r = 0.1- 0.8$ fm. This also indicates that the spectral function of off-diagonal gluons has the negative-value region.