cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ion-neutral sympathetic cooling in a hybrid linear rf Paul and magneto-optical trap
Creators: name: Goodman, D. S.
name: Sivarajah, I.
name: Wells, J. E.
name: Narducci, F. A.
name: Smith, W. W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Long range polarization forces between ions and neutral atoms result in large elastic scattering cross sections, e.g., 10^6 a.u. for Na+ on Na or Ca+ on Na at cold and ultracold temperatures. This suggests that a hybrid ion-neutral trap should offer a general means for significant sympathetic cooling of atomic or molecular ions. We present SIMION 7.0 simulation results concerning the advantages and limitations of sympathetic cooling within a hybrid trap apparatus, consisting of a linear rf Paul trap concentric with a Na magneto-optical trap (MOT). This paper explores the impact of various heating mechanisms on the hybrid system and how parameters related to the MOT, Paul trap, number of ions, and ion species affect the efficiency of the sympathetic cooling.
On recursion relations in topological string theory
Creators: name: Prudenziati, Andrea
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss a link between the topological recursion relations derived algebraically by Witten and the holomorphic anomaly equation of Bershadsky, Cecotti, Ooguri and Vafa. This is obtained through the definition of an operator ${\cal{W}}_s$ that reproduces the recursion relations for topological string theory coupled to worldsheet gravity a la BCOV. This operator is contained inside an algebra that generalizes the tt* equations and whose direct consequence is the holomorphic anomaly equation itself.
description: v3: matches the version to appear on JHEP
Low lying eigenvalues of randomly curved quantum waveguides
Creators: name: Borisov, Denis
name: Veselic', Ivan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35P15, 35C20, 60H25, 82B44

description: We consider the negative Dirichlet Laplacian on an infinite waveguide embedded in $\RR^2$, and finite segments thereof. The waveguide is a perturbation of a periodic strip in terms of a sequence of independent identically distributed random variables which influence the curvature. We derive explicit lower bounds on the first eigenvalue of finite segments of the randomly curved waveguide in the small coupling (i.e. weak disorder) regime. This allows us to estimate the probability of low lying eigenvalues, a tool which is relevant in the context of Anderson localization for random Schrödinger operators.
description: Minor changes to first version, accepted for publication in: Journal of Functional Analysis
Branching ratios of $B_c$ Meson Decaying to Vector and Axial-Vector Mesons
Creators: name: Dhir, Rohit
name: Kim, C. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the weak decays of $B_c$ mesons in Cabibbo-Kobayashi-Maskawa favored and suppressed modes. We present a detailed analysis of the $B_c$ meson decaying to vector meson (V) and axial-vector meson (A) in the final state. We also give the form factors involving $B_c \to A$ transition in the Isgur-Scora-Grinstein-Wise II framework and consequently, predict the branching ratios of $B_c \to V A$ and $AA$ decays.
description: 26 Pages, Version to appear in Phys. Rev. D(2013)
Host Galaxy Properties of the Subluminous GRB 120422A/SN 2012bz
Creators: name: Levesque, Emily M.
name: Chornock, Ryan
name: Soderberg, Alicia M.
name: Berger, Edo
name: Lunnan, Ragnhild
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: GRB 120422A is a nearby (z = 0.283) long-duration GRB (LGRB) detected by Swift with E(gamma,iso) ~ 4.5\times1049 erg. It is also associated with the spectroscopically-confirmed broad-lined Type Ic SN 2012bz. These properties establish GRB 120422A/SN 2012bz as the sixth and newest member of the class of subluminous GRB/SNe. Observations also show that GRB 120422A/SN 2012bz occurred at an unusually large offset (~8 kpc) from the host galaxy nucleus, setting it apart from other nearby LGRBs and leading to speculation that the host environment may have undergone prior interaction activity. Here we present spectroscopic observations using the 6.5m Magellan telescope at Las Campanas. We extract spectra at three specific locations within the GRB/SN host galaxy, including the host nucleus, the explosion site, and the "bridge" of diffuse emission connecting these two regions. We measure a metallicity of log(O/H) + 12 = 8.3 +/- 0.1 and a star formation rate per unit area of 0.08 Mo/yr/kpc^2 at the host nucleus. At the GRB/SN explosion site we measure a comparable metallicity of log(O/H) + 12 = 8.2 +/- 0.1, but find a much lower star formation rate per unit area of 0.01 M/yr/kpc^2. We also compare the host galaxy of this event to the hosts other LGRBs, including samples of subluminous LGRBs and cosmological LGRBs, and find no systematic metallicity difference between the environments of these different subtypes.
description: 7 pages, 3 figures; accepted for publication in ApJ
Observation of a p-wave Optical Feshbach Resonance
Creators: name: Yamazaki, Rekishu
name: Taie, Shintaro
name: Sugawa, Seiji
name: Enomoto, Katsunari
name: Takahashi, Yoshiro
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate a p$-wave optical Feshbach resonance (OFR) using purely long-range molecular states of a fermionic isotope of ytterbium ^{171}Yb, following the proposition made by K. Goyal et al. [Phys. Rev. A 82, 062704 (2010)]. The p-wave OFR is clearly observed as a modification of a photoassociation rate for atomic ensembles at about 5 micro-Kelvins. A scattering phase shift variation of δη=0.022 rad is observed with an atom loss rate coefficient K=28.0*10^{-12} cm^3/s.
title: Ab initio description of monopole resonances in light- and medium-mass nuclei : IV. Angular momentum projection and rotation-vibration coupling
Creators: name: Porro, A.
name: Duguet, T.
name: Ebran, J.-P.
name: Frosini, M.
name: Roth, R.
name: Somà, V.
Publisher: name: Springer
Year: 2025

description: Giant Resonances are, with nuclear rotations, the most evident expression of collectivity in finite nuclei. These two categories of excitations, however, are traditionally described within different formal schemes, such that vibrational and rotational degrees of freedom are separately treated and coupling effects between those are often neglected. The present work puts forward an approach aiming at a consistent treatment of vibrations and rotations. Specifically, this paper is the last in a series of four dedicated to the investigation of the giant monopole resonance in doubly open-shell nuclei via the ab initio Projected Generator Coordinate Method (PGCM). The present focus is on the treatment and impact of angular momentum restoration within such calculations. The PGCM being based on the use of deformed mean-field states, the angular-momentum restoration is performed when solving the secular equation to extract vibrational excitations. In this context, it is shown that performing the angular momentum restoration only after solving the secular equation contaminates the monopole response with an unphysical coupling to the rotational motion, as was also shown recently for (quasi-particle) random phase approximation calculations based on a deformed reference state. Eventually, the present work based on the PGCM confirms that an a priori angular momentum restoration is necessary to handle consistently both collective motions at the same time. This further pleads in favor of implementing the full-fledged projected (quasi-particle) random phase approximation in the future.
Альберт Бандура Об Отключении Моральной Ответственности
Creators: name: Cherkashyna, Anzhela
Publisher: name: Zenodo
Year: 2014

description: Русский перевод видеоинтервью Альберта Бандуры об отключении моральной ответственности. Для иллюстрации механизмов отключении моральной ответственности используются фрагменты из х/ф "Белая лента" Михаэля Ханеке. Статья создана для киноклуба КАППП.

Russian translation of the video-interview of Albert Bandura discussing moral disengagement. Fragments from the movie "The White Ribbon" by Michael Haneke are used to illustrate the mechanisms of moral disengagement. The article was created as a digital issue for the movie-club KAPPP.
The apparent excess in the Higgs to di-photon rate at the LHC: New Physics or QCD uncertainties?
Creators: name: Baglio, J.
name: Djouadi, A.
name: Godbole, R. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Higgs boson with a mass $M_H \approx 126$ GeV has been observed by the ATLAS and CMS experiments at the LHC and a total significance of about five standard deviations has been reported by both collaborations when the channels $H\to γγ$ and $H\to ZZ \to 4\ell$ are combined. Nevertheless, while the rates in the later search channel appear to be in accord with those predicted in the Standard Model, there seems to be an excess of data in the case of the $H\to γγ$ discovery channel. Before invoking new physics contributions to explain this excess in the di--photon Higgs rate, one should verify that standard QCD effects cannot account for it. We describe how the theoretical uncertainties in the Higgs boson cross section for the main production process at the LHC, $gg \to H$, which are known to be large, should be incorporated in practice. We further show that the discrepancy between the theoretical prediction and the measured value of the $gg \to H \to γγ$ rate, reduces to about one standard deviation when the QCD uncertainties are taken into account.
description: LaTeX, 2 figures, 9 pages. Final version published in Physics Letters B with minor typos corrected
Color Superconductivity, Fermionic Quasinormal Modes in Reissner-Nordström-anti-de Sitter Spacetimes and Supersymmetry
Creators: name: Oikonomou, V. K.
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 study two fermionic systems that have an underlying supersymmetric structure, namely a color superconductor and Dirac fermion in a Reissner-Nordström-anti-de Sitter gravitational background. In the chiral limit of the color superconductor, the localized fermionic zero modes around the vortex form an N=2 with zero central charge $d=1$ quantum algebra, with all the operators being Fredholm. We compute the Witten index of this algebra and we find an unbroken supersymmetry. The fermionic gravitational system in the chiral limit too, has two underlying unbroken N=2, $d=1$ supersymmetric algebras. The unbroken supersymmetry in the later is guaranteed by the existence of fermionic quasinormal modes in the Reissner-Nordström-anti-de Sitter background. In this case the operators are not Fredholm and regularized indices are deployed.
description: Typos of the published version corrected
Searching for galactic sources in the Swift GRB catalog
Creators: name: Tello, J. C.
name: Castro-Tirado, A. J.
name: Gorosabel, J.
name: Pérez-Ramírez, D.
name: Guziy, S.
name: Sánchez-Ramírez, R.
name: Jelínek, M.
name: Veres, P.
name: Bagoly, Z.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Since the early 1990s Gamma Ray Bursts have been accepted to be of extra-galactic origin due to the isotropic distribution observed by BATSE and the redshifts observed via absorption line spectroscopy. Nevertheless, upon further examination at least one case turned out to be of galactic origin. This particular event presented a Fast Rise, Exponential Decay (FRED) structure which leads us to believe that other FRED sources might also be Galactic. This study was set out to estimate the most probable degree of contamination by galactic sources that certain samples of FREDs have. In order to quantify the degree of anisotropy the average dipolar and quadripolar moments of each sample of GRBs with respect to the galactic plane were calculated. This was then compared to the probability distribution of simulated samples comprised of a combination of isotropically generated sources and galactic sources. We observe that the dipolar and quadripolar moments of the selected subsamples of FREDs are found more than two standard deviations outside those of random isotropically generated samples.The most probable degree of contamination by galactic sources for the FRED GRBs of the Swift catalog detected until February 2011 that do not have a known redshift is about 21 out of 77 sources which is roughly equal to 27%. Furthermore we observe, that by removing from this sample those bursts that may have any type of indirect redshift indicator and multiple peaks gives the most probable contamination increases up to 34% (17 out of 49 sources). It is probable that a high degree of contamination by galactic sources occurs among the single peak FREDs observed by Swift.
description: Published to A&A, 4 pages, 5 figures, this arXiv version includes appended table with all the bursts considered in this study
title: Incretin-based therapies in patients with Type 2 diabetes mellitus and renal impairment
Creators: name: Howse, Patricia Marie
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: The objective of this thesis is to add to literature addressing the safety and effectiveness of incretin-based agents in patients with diabetes and chronic kidney disease. Methods: Two complementary studies were conducted, a systematic review and meta-analysis and a population-based cohort study. Results: The systematic review and meta-analysis demonstrated in patients with diabetes and moderate or severe chronic kidney disease (CKD), incretin-based therapies effectively reduced glycated hemoglobin compared to placebo (WMD -0.53; 95%CI -0.64, -0.42). The pooled relative risk (RR) for all-cause mortality indicated no evidence of effect for incretin vs. placebo (RR 1.02; 95%CI 0.50, 2.06). In the cohort study dipeptidyl peptidase-4 (DPP-4) inhibitors, as second-line therapy were not significantly associated with a reduction in all-cause mortality (adjusted hazard ratio 0.74 [95%CI 0.52-1.04] vs. SU initiators). Conclusion: The meta-analysis supports incretin-based therapies as effectively reducing glycemia without substantial increased risk of hypoglycemia. The cohort study demonstrated second-line DPP4 inhibitor therapy was not significantly associated with a reduction in all-cause mortality when compared to sulfonylureas. Despite their introduction to the pharmaceutical market in 2007, there is still much to be understood regarding incretin therapy.
Supplementary material for JIFF2022.0108: Growth performance and fatty acids profile of common carp fed with raw black soldier fly larvae and honey bee drone brood
Creators: name: Gebauer, R.
name: Seeger, R.
name: Gebauer, T.
name: Wegener, J.
name: Kloas, W.
name: Schaefer, F.J.
Publisher: name: Brill Online
Year: 2023
Subjects: Aquaculture
Animal nutrition

description: The present study aimed to compare the growth performance and liver and muscle fatty acid (FA) profile of juvenile common carp fed with raw black soldier fly (BSFL; Hermetia illucens) and honey bee drone brood (BDB; Apis mellifera), a novel insect in aquaculture, with a commercial carp diet (CCF). After 6 weeks, the weight gain and specific growth rate were significantly higher in fish fed with CCF, followed by the BDB-fed and BSFL-fed fish, with significant differences among groups. The essential FA contents in feeds were disproportionally mirrored in fish livers and muscles, suggesting feed-dependant biosynthesis ability in common carp. In conclusion, the results suggest that dietary FAs affect the muscle FA composition of common carp. Yet, the composition of dietary essential FAs content did not mirror the essential FA content in muscle, confirming the biosynthesis of essential FAs. The BDB appeared to be a viable alternative or supplement to CCF compliant with circular bioeconomy without compromising the FA profile of common carp muscles. Despite the low growth performance of fish fed with BSFL, this diet indicated good nutritional qualities regarding the FA profiles.
Perceived Neighborhood Racial Composition and Depressive Symptoms Among Black Americans Across Adulthood: Evaluating the Role of Psychosocial Risks and Resources
Creators: name: Leslie, Erika Perez
name: Thorpe, Roland J.
name: Farmer, Heather R.
name: Barve, Apurva
name: Robinson, Millicent
name: Cross, Rebekah Israel
name: Tobin, Courtney S. Thomas
name: Huynh, James
Publisher: name: SAGE Publications
Year: 2022

description:
Objectives: To evaluate the relationships between perceived neighborhood racial composition (PNRC), psychosocial risks and resources, and depressive symptoms among young (ages 22-35), middle-aged (ages 36-49), and older (ages 50+) Black Americans. Methods: Full sample and age-stratified linear regression models estimated the PNRC-depressive symptoms association and the extent to which it persisted after accounting for psychosocial risks (i.e., neighborhood disorder, other social stressors) and resources (i.e., mastery, social support, racial identity) among 627 Black Americans in the Nashville Stress and Health Study. Results: Living in racially integrated and predominately White neighborhoods was associated with elevated depressive symptoms. While psychosocial risks and resources explained a substantial portion of these associations, patterns varied across age groups. Discussion: PNRC impacts depressive symptoms among Black Americans by shaping psychosocial risks and resources. Findings underscore interconnections between contextual and psychosocial factors, as well as the distinct mental health significance of these processes across stages of adulthood.
Constraining the distribution of dark matter at the Galactic centre using the high-resolution Event Horizon Telescope
Creators: name: Lacroix, Thomas
name: Silk, Joseph
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate constraints on the distribution of dark matter in the neighbourhood of the Galactic centre that may eventually be attained with the high-resolution Event Horizon Telescope (EHT). The shadow of a black hole in vacuum is used to generate a toy model describing how dark matter affects the size of the shadow of the supermassive black hole located at the Galactic centre. Observations by the EHT may constrain the properties of the dark matter distribution in a possible density spike around the black hole. Current uncertainties due to both the resolution of the telescope and the analysis of stellar orbits prevent one from discerning the effect of dark matter on the measured size of the shadow. The change in the size of the shadow induced by dark matter can be seen as an additional uncertainty in any test of general relativity that relies on using the angular size of the shadow to estimate the Schwarzschild radius of the black hole.
description: 5 pages, 4 figures. v2: a few comments and references added, one figure replaced for clarity, results unchanged, matches version published in A&A
SDAI: a key piece of software to manage the new wideband backend at Robledo
Creators: name: Rizzo, J. R.
name: Bustos, M. Gutiérrez
name: Kuiper, T. B. H.
name: Cernicharo, J.
name: Sotuela, I.
name: Pedreira, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: A joint collaborative project was recently developed to provide the Madrid Deep Space Communications Complex with a state-of-the-art wideband backend. This new backend provides from 100 MHz to 6 GHz of instantaneous bandwidth, and spectral resolutions from 6 to 200 kHz. The backend includes a new IF processor, as well as a FPGA-based FFT spectrometer, which manage thousands of spectroscopic channels in real time. All these equipment need to be controlled and operated by a common software, which has to synchronize activities among affected devices, and also with the observing program. The final output should be a calibrated spectrum, readable by standard radio astronomical tools for further processing. The developed software at this end is named "Spectroscopic Data Acquisition Interface" (SDAI). SDAI is written in python 2.5, using PyQt4 for the User Interface. By an ethernet socket connection, SDAI receives astronomical information (source, frequencies, Doppler correction, etc.) and the antenna status from the observing program. Then it synchronizes the observations at the required frequency by tuning the synthesizers through their USB ports; finally SDAI controls the FFT spectrometers through UDP commands sent by sockets. Data are transmitted from the FFT spectrometers by TCP sockets, and written as standard FITS files. In this paper we describe the modules built, depict a typical observing session, and show some astronomical results using SDAI.
description: This paper has been withdrawn by the author due to technical reasons. 15 pages, 6 figures. Proceedings of the Symposium "SPIE Astronomical Telescopes + Instrumentation", Conference 8451: Software and Cyberinfrastructure for Astronomy II, N.M. Radziwill and G. Chiozzi, eds., Amsterdam, 2012
Flexion measurement in simulations of Hubble Space Telescope data
Creators: name: Rowe, Barnaby
name: Bacon, David
name: Massey, Richard
name: Heymans, Catherine
name: Haeussler, Boris
name: Taylor, Andy
name: Rhodes, Jason
name: Mellier, Yannick
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a simulation analysis of weak gravitational lensing flexion and shear measurement using shapelet decomposition, and identify differences between flexion and shear measurement noise in deep survey data. Taking models of galaxies from the Hubble Space Telescope Ultra Deep Field (HUDF) and applying a correction for the HUDF point spread function we generate lensed simulations of deep, optical imaging data from Hubble's Advanced Camera for Surveys (ACS), with realistic galaxy morphologies. We find that flexion and shear estimates differ in our measurement pipeline: whereas intrinsic galaxy shape is typically the dominant contribution to noise in shear estimates, pixel noise due to finite photon counts and detector read noise is a major contributor to uncertainty in flexion estimates, across a broad range of galaxy signal-to-noise. This pixel noise also increases more rapidly as galaxy signal-to-noise decreases than is found for shear estimates. We provide simple power law fitting functions for this behaviour, for both flexion and shear, allowing the effect to be properly accounted for in future forecasts for flexion measurement. Using the simulations we also quantify the systematic biases of our shapelet flexion and shear measurement pipeline for deep Hubble data sets such as Galaxy Evolution from Morphology and SEDs, Space Telescope A901/902 Galaxy Evolution Survey or the Cosmic Evolution Survey. Flexion measurement biases are found to be significant but consistent with previous studies.
description: 24 pages, 15 figures, 5 tables. Key results in figures 6, 9 & 10. Version accepted for publication in MNRAS
The evolution of genetic architectures underlying quantitative traits
Creators: name: Rajon, Etienne
name: Plotkin, Joshua B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: In the classic view introduced by R. A. Fisher, a quantitative trait is encoded by many loci with small, additive effects. Recent advances in QTL mapping have begun to elucidate the genetic architectures underlying vast numbers of phenotypes across diverse taxa, producing observations that sometimes contrast with Fisher's blueprint. Despite these considerable empirical efforts to map the genetic determinants of traits, it remains poorly understood how the genetic architecture of a trait should evolve, or how it depends on the selection pressures on the trait. Here we develop a simple, population-genetic model for the evolution of genetic architectures. Our model predicts that traits under moderate selection should be encoded by many loci with highly variable effects, whereas traits under either weak or strong selection should be encoded by relatively few loci. We compare these theoretical predictions to qualitative trends in the genetics of human traits, and to systematic data on the genetics of gene expression levels in yeast. Our analysis provides an evolutionary explanation for broad empirical patterns in the genetic basis of traits, and it introduces a single framework that unifies the diversity of observed genetic architectures, ranging from Mendelian to Fisherian.
description: Minor changes in the text; Added supplementary material
Fixed points of nilpotent actions on ${\mathbb S}^{2}$
Creators: name: Ribón, Javier
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37E30, 37C85

description: We prove that a nilpotent subgroup of orientation preserving $C^{1}$ diffeomorphisms of ${\mathbb S}^{2}$ has a finite orbit of cardinality at most two. We also prove that a finitely generated nilpotent subgroup of orientation preserving $C^{1}$ diffeomorphisms of ${\mathbb R}^{2}$ preserving a compact set has a global fixed point. These results generalize theorems of Franks, Handel and Parwani for the abelian case. We show that a nilpotent subgroup of orientation preserving $C^{1}$ diffeomorphisms of ${\mathbb S}^{2}$ that has a finite orbit of odd cardinality also has a global fixed point. Moreover we study the properties of the two-points orbits of nilpotent fixed-point-free subgroups of orientation preserving $C^{1}$ diffeomorphisms of ${\mathbb S}^{2}$.
description: Some clarifications and minor corrections added
H.-G. Schmidt, Administrative Korrespondenz der französischen Könige um 1300. Edition des »Formelbuches« BNF ms. lat. 4763. Verwaltung – Gerichtsbarkeit – Kanzlei, 1997
Creators: name: Barret, S.
Publisher: name: Francia
Year: 2019

description: -
description: Francia, Bd. 26 Nr. 1 (1999)
Characterizing Genuine Multisite Entanglement in Isotropic Spin Lattices
Creators: name: Dhar, Himadri Shekhar
name: De, Aditi Sen
name: Sen, Ujjwal
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider a class of large superposed states, obtained from dimer coverings on spin-1/2 isotropic lattices, whose potential usefulness ranges from organic molecules to quantum computation. We show that they are genuinely multiparty entangled, irrespective of the geometry and dimension of the isotropic lattice. We then present an efficient method to characterize the genuine multisite entanglement in the case of isotropic square spin-1/2 lattices, with short-range dimer coverings. We use this iterative analytical method to calculate the multisite entanglement of finite-sized lattices, which through finite-size scaling, enables us to obtain the estimate of the multisite entanglement of the infinite square lattice. The method can be a useful tool to investigate other single- and multisite properties of such states.
description: 5 + 1 pages, 1 + 1 figures, Supplemetal Material included, REVTeX 4.1, published version
Direct Determination of Hubble Parameter Using Type IIn Supernovae
Creators: name: Blinnikov, Sergei
name: Potashov, Marat
name: Baklanov, Petr
name: Dolgov, Alexander
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a novel approach, a Dense Shell Method (DSM), for measuring distances for cosmology. It is based on original Baade idea to relate absolute difference of photospheric radii with photospheric velocity. We demonstrate that this idea works: the new method does not rely on the Cosmic Distance Ladder and gives satisfactory results for the most luminous Type IIn Supernovae. This allows one to make them good primary distance indicators for cosmology. Fixing correction factors for illustration, we obtain with this method the median distance of 68^{+19}_{-15} (68%CL) Mpc to SN 2006gy and median Hubble parameter 79^{+23}_{-17} (68%CL) km/s/Mpc.
description: 6 pages, 1 figure, typos corrected
I percorsi scientifici, le scelte, la progettualita', le scommesse, tra scienza,  responsabilità, e equilibri con nella vita privata.
Creators: name: Ravaioli, Mariangela
Publisher: name: Zenodo
Year: 2024

description: Il contributo racconta di percorsi scientifici di oltre quaranta anni di ricerche nel campo della geologia ambientale marina, dell’evoluzione climatiche, dei processi biogeochimici, dell’inquinamento, della salute dei mari, fiumi e lagune, dal Mediterraneo all’Antartide.

Da precaria a ricercatrice, ho promosso e coordinato progetti regionali, nazionali, europei, pubblici e privati, oltre infrastrutture di ricerca per l’osservazione dei mari, l’innovazione e il trasferimento tecnologico. Ho condotto sperimentazione in laboratori e in mare fino al lontano Antartide. In contemporanea ho ricoperto responsabilità di Direzione e Presidenza di strutture di ricerca. Ho scelto, inoltre, di essere a disposizione della ricerca pubblica a beneficio dei collaboratori/collaboratrici, studenti/ studentesse: percorsi entusiasmanti, difficili e svolti in solitudine.

Da oltre trent’anni partecipo alle attività dell’Associazione Donne e Scienza per capire e analizzare le disparità di genere sui temi delle carriere, ambiente e sociale. Sui temi di scienza e di equità di genere, porto anche la mia testimonianza in scuole di ogni ordine e grado e nella società.

Concludo sottolineando come Il tempo lavorativo porti con sé una significativa diversità di genere sia perché le donne si portano nell’attività professionale il carico mentale della famiglia e del lavoro di cura, sia perché esse sono occupate generosamente in attività organizzative e di supporto alla ricerca e per questo poco valorizzate e premiate a differenza di quanto accade per le carriere maschili. 

Nella mia vita ho affrontato e combattuto tutto questo, traendo molte  soddisfazioni ma anche subendo disparità e pochi riconoscimenti.
Numerical Study of Charge Transport of Overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$ within Semiclassical Boltzmann Transport Theory
Creators: name: Buhmann, Jonathan M.
name: Ossadnik, Matthias
name: Rice, T. M.
name: Sigrist, Manfred
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The in-plane resistivity of the high-temperature oxide superconductor La$_{2-x}$Sr$_{x}$CuO$_{4}$ [LSCO] shows a strong growth of a contribution linear in temperature as the doping is reduced in the overdoped region toward optimal. This linear term is a signature of non-Fermi liquid behavior. We find that the appearance of a linear term in the resistivity can arise in a semiclassical Boltzmann transport theory which uses renormalized quasiparticle scattering rates and an empirical band structure fitted to ARPES data on LSCO. The linearized Boltzmann equation is solved numerically by discretizing the Brillouin zone in a way that fits best to the Fermi surface geometry. The main trends in the development of the anomalous temperature dependence are well reproduced. There is a substantial underestimation of the magnitude of the resistivity which is expected in view of the moderate to weak values we chose for the onsite repulsion to stay within the one-loop renormalization group approximation. The analysis was extended to the Seebeck coefficient with similar agreement with the main trends in the data.
description: 16 pages, 13 figures
Sharing research data and software - FAIR & FAIR4RS - Presentation 27/06/2023 Summer School Collaborative Scientific Software Development
Creators: name: Ostrop, Jenny
Publisher: name: Zenodo
Year: 2023
Subjects: FAIR
FAIR4RS
FAIR Data
Open Data
Research Software
Citable Code
Open Science

description: Presentation slides "Sharing research data and software - FAIR & FAIR4RS" for the Collaborative scientific software development summer school hosted by University of Bergen Library Digital Lab. Open Science – a paradigm shift Sharing data: Open & FAIR research data Sharing software/code: FAIR for research software How to make your code citable
description: Contact: research-data[at]uib.no
On the significance of polarization charge and isomagnetic surface in the interaction between conducting fluid and magnetic field
Creators: name: Liang, Zhu-Xing
name: Liang, Yi
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: From the frozen-in field lines concept, a highly conducting fluid can move freely along, but not traverse to, magnetic field lines. We discuss this topic and find that in the study of the frozen-in field lines concept, the effects of inductive and capacitive reactance have been omitted. When admitted, the relationships among the motional electromotive field, the induced electric field, the eddy electric current, and the magnetic field becomes clearer and the frozen-in field line concept can be reconsidered. We emphasize the importance of isomagnetic surfaces and polarization charges, and show analytically that whether a conducting fluid can freely traverse magnetic field lines or not depends solely on the magnetic gradient in the direction of fluid motion. If a fluid does not change its density distribution and shape (can be regarded as a quasi-rigid body), and as long as it is moving along an isomagnetic surface, it can freely traverse magnetic field lines without any magnetic resistance no matter how strong the magnetic field is. When our analysis is applied, the origin of the magnetic field of sunspots can be interpreted easily. In addition, we also present experimental results to support our analysis.
description: 12 pages, 12 figures, 4 tables
L'Histoire 14-18: Mourir pour la patrie, 1992 (A. Wirsching) ; Le Paris des étrangers depuis un siècle, sous la dir. de A. Kaspi et A. Marès, 1989 - Le Paris de étrangers depuis 1945, sous la dir. de A. Marès et P. Milza, 1994 (A. Wirsching) ; Les héritages du Congrès de Tours (1920-1990), sous la dir. de J. Girault, 1992
Creators: name: Wirsching, A.
Publisher: name: Francia
Year: 2019

description: -
description: Francia, Bd. 26 Nr. 3 (1999)
title: Pre-service teacher preparation: supporting students with mental health conditions in the classroom
Creators: name: Oliver, Greg
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: Many pre-service teacher education programs do not adequately prepare teachers to support students with mental health conditions in the classroom. The purpose of this study was to assess pre-service teachers’ knowledge and attitudes surrounding mental health. A total of 44 preservice teachers were recruited to complete a Mental Health Literacy Curriculum Resource Survey (2016). The survey’s scope covers pre-service teacher knowledge about mental health conditions, attitudes towards those with mental illness, and attitudes towards help-seeking behaviour for themselves and others. The results showed that less than half of pre-service teachers were aware of mental health literacy as a framework for learning about mental health. The results suggested that pre-service teachers in this study demonstrated less knowledge or fewer positive attitudes indicating a need to address teacher attitudes and beliefs prior to entering the classroom. Significant findings from the survey demonstrated that some pre-service teachers believe that individuals with mental illness act strange and can be dangerous and violent. Fewer positive attitudes towards those with mental illness can impact teacher willingness to support students with mental health issues. Such attitudes may exist due to less knowledge about mental health, pointing to the importance of mental health training to equip teachers with the information and tools to feel empowered and prepared prior to entering the classroom.
Critical behavior of the XY model in complex topologies
Creators: name: Berganza, Miguel Ibáñez
name: Leuzzi, Luca
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The critical behavior of the O(2) model on dilute Levy graphs built on a 2D square lattice is analyzed. Different qualitative cases are probed, varying the exponent rho governing the dependence on the distance of the connectivity probability distribution. The mean-field regime, as well as the long-range and short-range non-mean-field regimes are investigated by means of high-performance parallel Monte-Carlo numerical simulations running on GPUs. The relationship between the long-range rho exponent and the effective dimension of an equivalent short-range system with the same critical behavior is investigated. Evidence is provided for the effective short-range dimension to coincide with the spectral dimension of the Levy graph for the XY model in the mean-field regime.
description: 18 pages, 22 figures. Minor corrections, improved estimations of critical quantities
Equivalence Classes of Colorings
Creators: name: Ge, Jun
name: Jablan, Slavik
name: Kauffman, Louis H.
name: Lopes, Pedro
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 2010: 57M27

description: For any link and for any modulus $m$ we introduce an equivalence relation on the set of non-trivial m-colorings of the link (an m-coloring has values in Z/mZ). Given a diagram of the link, the equivalence class of a non-trivial m-coloring is formed by each assignment of colors to the arcs of the diagram that is obtained from the former coloring by a permutation of the colors in the arcs which preserves the coloring condition at each crossing. This requirement implies topological invariance of the equivalence classes. We show that for a prime modulus the number of equivalence classes depends on the modulus and on the rank of the coloring matrix (with respect to this modulus).
description: This is the version accepted for publication of the article formerly entitled "Equivalence Classes of Colorings: the Topological Viewpoint"
Financial instability from local market measures
Creators: name: Bardoscia, Marco
name: Livan, Giacomo
name: Marsili, Matteo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We study the emergence of instabilities in a stylized model of a financial market, when different market actors calculate prices according to different (local) market measures. We derive typical properties for ensembles of large random markets using techniques borrowed from statistical mechanics of disordered systems. We show that, depending on the number of financial instruments available and on the heterogeneity of local measures, the market moves from an arbitrage-free phase to an unstable one, where the complexity of the market - as measured by the diversity of financial instruments - increases, and arbitrage opportunities arise. A sharp transition separates the two phases. Focusing on two different classes of local measures inspired by real markets strategies, we are able to analytically compute the critical lines, corroborating our findings with numerical simulations.
description: 17 pages, 4 figures
Work extraction via quantum nondemolition measurements of qubits in cavities: Non-Markovian effects
Creators: name: Gelbwaser-Klimovsky, David
name: Erez, Noam
name: Alicki, Robert
name: Kurizki, Gershon
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that frequent nondemolition measurements of a quantum system immersed in a thermal bath allow the extraction of work in a closed cycle from the system-bath interaction (correlation) energy, a hitherto unexploited work resource. It allows for work even if no information is gathered or the bath is at zero temperature, provided the cycle is within the bath memory time. The predicted work resource may be the basis of quantum engines embedded in a bath with long memory time, such as the electromagnetic bath of a high-Q cavity coupled to two-level systems.
Frauenorte in Sachsen-Anhalt. Interview mit Elke Stolze
Creators: name: Jaiser, Constanze
name: Stolze, Elke
Publisher: name: querelles-net
Year: 2001
Subjects: DDR; Regionalstudien; Biografie; Geschlecht; Gender

description: querelles-net, Nr. 5 (2001): Ost- und Westdeutschland
J. McManners, Church and Society in Eighteenth-Century France. 2 volumes. Volume 1: The Clerical Establishment and its Social Ramifications. Volume 2: The Religion of the People and the Politics of Religion, 1998
Creators: name: Le Brun, J.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 28 Nr. 2 (2001)
Noise statistics in a fast digital radio receiver: the Bedlam backend for the Parkes Radio Telescope
Creators: name: Bray, J. D.
name: Ekers, R. D.
name: Roberts, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The digital record of the voltage in a radio telescope receiver, after frequency conversion and sampling at a finite rate, is not a perfect representation of the original analog signal. To detect and characterise a transient event with a duration comparable to the inverse bandwidth it is necessary to compensate for these effects, which modifies the statistics of the signal, making it difficult to determine the significance of a potential detection. We present an analysis of these modified statistics and demonstrate them with experimental results from Bedlam, a new digital backend for the Parkes radio telescope.
description: 21 pages, 8 figures, accepted for publication in Experimental Astronomy
title: (Re)routing and (Re)rooting in Urban Exile
title: Exploring Villa Ocampo in Buenos Aires and Jassim House in Bombay with Actor-Network-Theory
titleType: Subtitle
Creators: name: Dogramaci (Ed.), Burcu
name: Aygün (Ed.), Ekatarina
name: Hetschold (Ed.), Mareike
name: Lee (Ed.), Rachel
name: Karp Lugo (Ed.), Laura
name: Roth (Ed.), Helene
Publisher: name: intellect
Year: 2023

description: In the first half of the 20th century two private homes in Buenos Aires and Bombay became the nodding point for creative exchanges between local and exiled artists. The Villa of Victoria Ocampo – writer, founder of Sur magazine and key figure in the art scene of Buenos Aires – was a space of encounters between Argentine writers such as José Luis Borges with emigré artists like the Spanish poet Rafael Alberti. The Villa was architecturally a mix of vernacular elements with European style features. Equally cooperative in spirit was the cultural circle around the Jassim House in Bombay. The three Asian co-founders of MARG magazine Mulk Raj Anand, Anil and Minnette de Silva were sewed into a diverse exile network here. Together with the Austrian artist couple Käthe and Walter Langhammer as well as the Indian art collector Homi Bhaba, they fostered a unique discourse on art and architecture. Again, the built environment resembled this social openness and permeability. Based on historic text and photographic material the paper analyses the human and non-human relations of these contact zones. Deploying Actor-Network-Theory it asks, which spatial, aesthetic, and personal factors constitute the “agency” (Latour 2010) of these social infrastructures in two metropolises shaped by emigration. In conclusion, the paper outlines the conditions for transcultural exchange in urban exile.
W. H. Stein (Hg.), Die Akten der Wälder-Departements im Landeshauptarchiv Koblenz, 1794–1816. Inventar der Bestände 300 (Wälder-Departement) und 352 (Generalgouvernementskommissariat des Mittelrheins für die Wälder-Departements), 1998
Creators: name: Hudemann-Simon, C.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 28 Nr. 2 (2001)
Electron-hole pairing in topological insulator thin film
Creators: name: Efimkin, D. K.
name: Lozovik, Yu. E.
name: Sokolik, A. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider pairing of massless Dirac electrons and holes located on opposite surfaces of thin film of "strong" three-dimensional topological insulator. Such pairing was predicted to give rise to topological exciton condensate with unusual properties. We estimate quantitatively achievable critical temperature of the pairing with taking into account self-consistent screening of the Coulomb interaction, disorder and hybridization of electron and hole states caused by a tunneling through the film. Increase of the gap above the hybridization value when the temperature is lowered can be observable signature of the pairing. System parameters required to observe the electron-hole pairing are discussed.
description: 9 pages, 9 figures; figures 6, 7, 9 were improved and some references were added
Staatliche Schlösser und Gärten Baden-Württembergs (Hg.), Die Lust am Jagen. Jagdsitten und Jagdfeste am Kurpfälzischen Hof im 18. Jahrhundert, 1999
Creators: name: Duindam, J.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 28 Nr. 2 (2001)