cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Digital Feedback System for Advanced Ion Manipulation Techniques in Penning Traps
Creators: name: Herkenhoff, Jost
name: Door, Menno
name: Filianin, Pavel
name: Huang, Wenjia
name: Kromer, Kathrin
name: Lange, Daniel
name: Schüssler, Rima X.
name: Schweiger, Christoph
name: Eliseev, Sergey
name: Blaum, Klaus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The possibility to apply active feedback to a single ion in a Penning trap using a fully digital system is demonstrated. Previously realized feedback systems rely on analog circuits that are susceptible to environmental fluctuations and long term drifts, as well as being limited to the specific task they were designed for. The presented system is implemented using an FPGA-based platform (STEMlab), offering greater flexibility, higher temporal stability and the possibility for highly dynamic variation of feedback parameters. The system's capabilities were demonstrated by applying feedback to the ion detection system primarily consisting of a resonant circuit. This allowed shifts in its resonance frequency of up to several kHz and free modification of its quality factor within two orders of magnitude, which reduces the temperature of a single ion by a factor of 6. Furthermore, a phase-sensitive detection technique for the axial ion oscillation was implemented, which reduces the current measurement time by two orders of magnitude while simultaneously eliminating model-related systematic uncertainties. The use of FPGA technology allowed the implementation of a fully-featured data acquisition system, making it possible to realize feedback techniques that require constant monitoring of the ion signal. This was successfully used to implement a single-ion self-excited oscillator.
description: The following article has been accepted by Review of Scientific Instruments. After it is published, it will be found at https://aip.scitation.org/journal/rsi
Renormalized Polyakov loop in the Fixed Scale Approach
Creators: name: Gavai, Rajiv V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I compute the deconfinement order parameter for the SU(2) lattice gauge theory, the Polyakov loop, using the fixed scale approach for two different scales and show how one can obtain a physical, renormalized, order parameter. The generalization to other gauge theories, including quenched or full QCD, is straightforward.
description: Final published version, Added references, Minor Changes, 9pages, 4 Figures
Multiple stellar populations in globular clusters with photometry and low resolution spectroscopy
Creators: name: Lardo, Carmela <1984>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: FIS/05 Astronomia e astrofisica

description: Our view of Globular Clusters has deeply changed in the last decade. Modern spectroscopic and photometric data have 
conclusively established that globulars are neither coeval nor monometallic, reopening the issue of  the formation of such systems.
Their formation is now schematized as a two-step process, during which the polluted matter from the more massive 
stars of a first generation gives birth, in the cluster innermost regions, to a second generation of stars with the characteristic signature of 
fully CNO-processed matter.
To date, star-to-star variations in abundances of the light elements (C, N, O, Na) have been observed in stars of all evolutionary phases in 
all properly studied Galactic globular clusters. Multiple or broad evolutionary sequences have also been observed in nearly all the clusters that have been observed with good signal-to-noise in the appropriate photometric bands.
The body of evidence suggests that spreads in light-element abundances can be fairly well traced by photometric indices including near 
ultraviolet passbands, as CNO abundance variations affect mainly wavelengths shorter than ~400 nm owing to the rise of some NH and CN molecular 
absorption bands. Here, we exploit this property of near ultraviolet photometry to trace internal chemical variations and combined it with low resolution spectroscopy aimed to derive carbon and nitrogen abundances in order to maximize the information on the multiple populations.
This approach has been proven to be very effective in (i) detecting multiple population,
(ii) characterizing their global properties (i.e., relative fraction of stars, location in the color-magnitude diagram, spatial distribution, and trends with cluster parameters) and (iii) precisely tagging their chemical properties (i.e., extension of the C-N anticorrelation, bimodalities in the N content).
Traduc-thon : Expérimenter la traduction de REL avec les outils d'IAg
Creators: name: Dube, Marianne
name: Piché, Serge
Publisher: name: Université de Sherbrooke, Service de soutien à la formation
Year: 2025
Subjects: Intelligence artificielle générative
IAg
Pédagogie universitaire
Intelligence articielle-Applications en éducation
Traduction
REL
Ressources éducatives libres
Atelier
Scénario pédagogique
Traduction automatique

description: Scénario pédagogique et ressources nécessaires pour animer un atelier sur l'utilisation des outils d'IAg pour traduire des REL.

Inspiré des hack-o-thon, cette activité rassemblera, en petites équipes, les personnes participantes avec l’objectif de traduire, de manière appropriée, un manuel disciplinaire sous licence libre (CC) de l’anglais vers le français avec un outil d’intelligence artificielle générative (IAg). 
description: Ressources éducatives libres

REL

Open Educational Resources

OER
description: Discipline : Éducation

Format : Texte/HTML

Type de la ressource : Objet d'apprentissage
Amplifying Optical Signals with Discrete Solitons in Waveguide Arrays
Creators: name: Javed, Amaria
name: Shaheen, Alaa
name: Khawaja, U. Al
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We present a design and protocol to achieve an essential feature of an optical transistor, namely the amplification of input signal with the use of discrete solitons in waveguide arrays. We consider the scattering of a discrete soliton by a reflectionless potential in the presence of a control soliton. We show that at the sharp transition region between full reflectance and full transmittance, the intensity of the reflected or transmitted soliton is highly sensitive to the intensity of the control soliton. This suggests a setup of signal amplifier. For realistic purposes, we modulate the parameters of the reflectionless potential well to achieve a performance of amplifier with a controllable amplification. To facilitate the experimental realization, we calculate the amplification factor in terms of the parameters of the potential well and the input power of the control soliton. The suggested signal amplifier device will be an important component in the all-optical data processing.
Cooperative Wireless Systems
Creators: name: La Palombara, Cristina <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: ING-INF/03 Telecomunicazioni

description: This Ph.D. dissertation reports on the work performed at the Wireless Communication Laboratory - University of Bologna and National Research Council - as well as, for six months, at the Fraunhofer Institute for Integrated Circuit (IIS) in Nürnberg. The work of this thesis is in the area of wireless communications, especially with regards to cooperative communications aspects in narrow-band and ultra-wideband systems, cooperative links characterization, network geometry, power allocation techniques,and synchronization between nodes. The underpinning of this work is devoted to developing a general framework for design and analysis of wireless cooperative communication systems, which depends on propagation environment, transmission technique, diversity method, power allocation for various scenarios and relay positions. The optimal power allocation for minimizing the bit error probability at the destination is derived. In addition, a syncronization algorithm for master-slave communications is proposed with the aim of jointly compensate the clock drift and offset of wireless nodes composing the network.
At infinity of finite-dimensional CAT(0) spaces
Creators: name: Caprace, Pierre-Emmanuel
name: Lytchak, Alexander
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 53C20, 20F65

description: We show that any filtering family of closed convex subsets of a finite-dimensional CAT(0) space $X$ has a non-empty intersection in the visual bordification $ \bar{X} = X \cup \partial X$. Using this fact, several results known for proper CAT(0) spaces may be extended to finite-dimensional spaces, including the existence of canonical fixed points at infinity for parabolic isometries, algebraic and geometric restrictions on amenable group actions, and geometric superrigidity for non-elementary actions of irreducible uniform lattices in products of locally compact groups.
description: An erratum filling in a gap in the proof of an application of the main result has been included to the original paper
Topological theory of inversion-breaking charge-density-wave monolayer 1\textit{T}-TiSe$_2$
Creators: name: Hsu, Ming-Chien
name: Singh, Bahadur
name: Hsu, Chuang-Han
name: Xu, Su-Yang
name: Lin, Hsin
name: Huang, Shin-Ming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A charge density wave (CDW) of a nonzero ordering vector $\mathbf{q}$ couple electronic states at $\mathbf{k}$ and $\mathbf{k}+\mathbf{q}$ statically, giving rise to a reduced Brillouin zone (RBZ) due to the band folding effect. Its structure, in terms of an irreducible representation of the little group of $\mathbf{q}$, would change the symmetry of the system and electronic structure accompanying possible change of band inversion, offering a chance of the topological phase transition. Monolayer 1\textit{T}-TiSe$_2$ is investigated for it shows an unconventional CDW phase having a triple-$q$ $M_1^-$ structure. Moreover, the coupling between the triple-$q$ component of the $M_1^-$ CDW will inevitably produce a small $M_1^+$ CDW. The CDW yields a band inversion in 1\textit{T}-TiSe$_2$ but different types of CDW can affect the electronic structure and system topology differently. The impact of CDW of different types was studied by utilizing a symmetrization-antisymmetrization technique to extract the $M_1^-$ and $M_1^+$ CDW contributions in the DFT-based tight-binding model and study their effects. The results are consistent with the parity consideration, improving understanding of topology for a CDW system with and without parity.
description: 8 pages, 6 figures. Accepted by New. J. Phys
The effect of osmolytes on protein fold stability at the single-molecule level
Creators: name: Aioanei, Daniel <1980>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: CHIM/06 Chimica organica

description: By pulling and releasing the tension on protein homomers with the Atomic Force Miscroscope (AFM) at different pulling speeds, dwell times and dwell distances, the observed force-response of the protein can be fitted with suitable theoretical models. In this respect we developed mathematical procedures and open-source computer codes for driving such experiments and fitting Bell’s model to experimental protein unfolding forces and protein folding frequencies.

We applied the above techniques to the study of proteins GB1 (the B1 IgG-binding domain of protein G from Streptococcus) and I27 (a module of human cardiac titin) in aqueous solutions of protecting osmolytes such as dimethyl sulfoxide (DMSO), glycerol and trimethylamine N-oxide (TMAO). In order to get a molecular understanding of the experimental results we developed an Ising-like model for proteins that incorporates the osmophobic nature of their backbone. The model benefits from analytical thermodynamics and kinetics amenable to Monte-Carlo simulation.

The prevailing view used to be that small protecting osmolytes bridge the separating beta-strands of proteins with mechanical resistance, presumably shifting the transition state to significantly higher distances that correlate with the molecular size of the osmolyte molecules. Our experiments showed instead that protecting osmolytes slow down protein unfolding and speed-up protein folding at physiological pH without shifting the protein transition state on the mechanical reaction coordinate. Together with the theoretical results of the Ising-model, our results lend support to the osmophobic theory according to which osmolyte stabilisation is a result of the preferential exclusion of the osmolyte molecules from the protein backbone.

The results obtained during this thesis work have markedly improved our understanding of the strategy selected by Nature to strengthen protein stability in hostile environments, shifting the focus from hypothetical protein-osmolyte interactions to the more general mechanism based on the osmophobicity of the protein backbone.
Modeling and simulations of some anisotropic soft-matter systems: from biaxial to chiral materials
Creators: name: Querciagrossa, Lara <1985>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: CHIM/02 Chimica fisica

description: We have modeled various soft-matter systems with molecular dynamics (MD) simulations. 
The first topic concerns liquid crystal (LC) biaxial nematic (Nb) phases, that can be possibly used in fast displays. We have investigated the phase organization of biaxial Gay-Berne (GB) mesogens, considering the effects of the orientation, strength and position of a molecular dipole. We have observed that for systems with a central dipole, nematic biaxial phases disappear when increasing dipole strength, while for systems characterized by an offset dipole, the Nb phase is stabilized at very low temperatures.  
In a second project, in view of their increasing importance as nanomaterials in LC phases, we are developing a DNA coarse-grained (CG) model, in which sugar and phosphate groups are represented with Lennard-Jones spheres, while bases with GB ellipsoids. We have obtained shape, position and orientation parameters for each bead, to best reproduce the atomistic structure of a B-DNA helix. Starting from
atomistic simulations results, we have completed a first parametrization of the force field terms, accounting for bonded (bonds, angles and dihedrals) and non-bonded interactions (H-bond and stacking). We are currently validating the model, by investigating stability and melting temperature of various sequences. 
Finally, in a third project, we aim to explain the mechanism of enantiomeric discrimination due to the presence of a chiral helix of poly(gamma-benzyl L-glutamate) (PBLG), in solution of dimethylformamide (DMF), interacting with chiral or pro-chiral molecules (in our case heptyl butyrate, HEP), after tuning properly an atomistic force field (AMBER). We have observed that DMF and HEP molecules solvate uniformly the PBLG helix, but the pro-chiral solute is on average found closer to the helix with respect to the DMF. The solvent presents a faster isotropic diffusion, twice as HEP, also indicating a stronger interaction of the solute with the helix.
CIFRA National Survey: Uruguay November 2010
Creators: name: CIFRA, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Economy; purchasing appliances and furniture; taken out credit/loan in the last three years; have a bank account; vehicle ownership; industry vs. environment; opinion of increased industrial activity; forest industry/pulp production; agrochemical industry; soy plantations; main problems in Uruguay; health; education; taxes; unemployment; public safety/crime; drugs/drug trafficking; poverty; inflation; the economy; human rights/expiration; prison conditions; feeling toward political leaders; José (Pepe) Mujica; Jorge Larrañaga; Pedro Bordaberry; Danilo Astori; Luis Alberto Lacalle; Tabaré Vazquez; José Amorín; party sympathies; Frente Amplio (a leftist political coalition); National Party; Colorado Party; Independent Party; better off than previous generation; President José Mujica job approval; agricultural development; promotion of tourism; promotion of investments; relationships between political parties; relationships with unions; foreign relations; housing for disadvantaged populations; public sector vs. private sector labor conditions; construction of new prisons; reeducation of juvenile offenders; trust in power of attorney; trust in Parliament; trust in PIT CNT (national trade union center); trust in the Catholic Church; Law on the Expiration of the Punitive Claims of the State (Expiry Law); 2009 general election; vote for or against parties; vote for or against candidates. National Agency for Research and Innovation (ANII) Collection.
An inversion algorithm for P-functions with applications to Multi-energy CT
Creators: name: Bal, Guillaume
name: Gong, Ruoming
name: Terzioglu, Fatma
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: Primary 65R32, Secondary 92C55

description: Multi-energy computed tomography (ME-CT) is an x-ray transmission imaging technique that uses the energy dependence of x-ray photon attenuation to determine the elemental composition of an object of interest. Mathematically, forward ME-CT measurements are modeled by a nonlinear integral transform. In this paper, local conditions for global invertibility of the ME-CT transform are studied, and explicit stability estimates quantifying the error propagation from measurements to reconstructions are provided. Motivated from the inverse problem of image reconstruction in ME-CT, an iterative inversion algorithm for the so-called P-functions is proposed. Numerical simulations for ME-CT, in two and three materials settings with an equal number of energy measurements, confirm the theoretical predictions.
description: 21 pages, 11 figures
Fermion propagators in space-time
Creators: name: Barbaro, M. B.
name: Berardo, D.
name: Cenni, R.
name: Donnelly, T. W.
name: Molinari, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The one- and the two-particle propagators for an infinite non-interacting Fermi system are studied as functions of space-time coordinates. Their behaviour at the origin and in the asymptotic region is discussed, as is their scaling in the Fermi momentum. Both propagators are shown to have a divergence at equal times. The impact of the interaction among the fermions on their momentum distribution, on their pair correlation function and, hence, on the Coulomb sum rule is explored using a phenomenological model. Finally the problem of how the confinement is reflected in the momentum distribution of the system's constituents is briefly addressed.
description: 26 pages, 9 figures, accepted for publication on Phys. Rev. C
Blue Straggler Stars in Open Clusters using Gaia: Dependence on Cluster Parameters and Possible Formation Pathways
Creators: name: Jadhav, Vikrant
name: Subramaniam, Annapurni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Blue straggler stars (BSSs) are the most massive stars in a cluster formed via binary or higher-order stellar interactions. Though the exact nature of such formation scenarios is difficult to pin down, we provide observational constraints on the different possible mechanism. In this quest, we first produce a catalogue of BSSs using Gaia DR2 data. Among the 670 clusters older than 300 Myr, we identified 868 BSSs in 228 clusters and 500 BSS candidates in 208 clusters. In general, all clusters older than 1 Gyr and massive than 1000 Msun have BSSs. The average number of BSSs increases with cluster age and mass, and there is a power-law relation between the cluster mass and the maximum number of BSSs in the cluster. We introduce the term fractional mass excess (Me) for BSSs. We find that at least 54\% of BSSs have Me $$ 1.0 (likely from multiple mergers/MT). We also find that the percentage of low Me BSSs increases with age, beyond 1--2 Gyr, suggesting an increase in formation through MT in older clusters. The BSSs are radially segregated, and the extent of segregation depends on the dynamical relaxation of the cluster. The statistics and trends presented here are expected to constrain the BSS formation models in open clusters.
description: 11 pages, 7 figures, includes online supplementary materials. Accepted in MNRAS
Recent results on strangeness production from NA49
Creators: name: Mitrovski, Michael
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present a summary of measurements of strange particles performed by the experiment NA49 in inelastic p+p interactions, as well as semi-central C+C and Si+Si, central Pb+Pb, and minimum bias Pb+Pb collisions in the energy range $\sqrt{s_{NN}}$ = 6.3 - 17.3 GeV. New results on $π^{-}$, $K^{+}$ and $K^{-}$ production in minimum bias Pb+Pb collisions at $\sqrt{s_{NN}}$ = 8.7 and 17.3 are shown. Furthermore the strangeness enhancement factor at $\sqrt{s_{NN}}$ = 17.3 GeV is presented and compared to the results from NA57 and STAR. Energy dependence of strange particle yields normalized to pion yields is presented. New data on $$ production are shown at $\sqrt{s_{NN}}$ = 17.3 GeV. Furthermore we present the energy dependence of $K/π$ and $K/p$ fluctuations. The data are compared with model predictions.
description: 9 pages, 7 figures, Submitted to J. Phys. G (Proceedings of the International Conference on Strangeness in Quark Matter, Buzios, Rio de Janeiro, Brazil, September 27 - October 2, 2009)
Supersolidity in the triangular lattice spin-1/2 XXZ model: A variational perspective
Creators: name: Heidarian, Dariush
name: Paramekanti, Arun
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the spin-1/2 XXZ model on the triangular lattice with a nearest neighbor antiferromagnetic Ising coupling $J_z>0$ and unfrustrated ($J_\perp<0$) or frustrated ($J_\perp>0$) kinetic terms in zero magnetic field. Incorporating long-range Jastrow correlations over a mean field spin state, we obtain the variational phase diagram of this model on large lattices for arbitrary $J_z$ and either sign of $J_\perp$. For $J_\perp<0$, we find a $\sqrt{3}\times\sqrt{3}$ supersolid for $J_z/|J_\perp| \gtrsim 4.7$, in excellent agreement with quantum Monte Carlo data. For $J_\perp >0$, a distinct $\sqrt{3}\times\sqrt{3}$ supersolid is found to emerge for $J_z/J_\perp \geq 1$. Both supersolids exhibit a spontaneous density deviation from half-filling. At $J_z/J_\perp=\infty$, the crystalline order parameters of these two supersolids are nearly identical, consistent with exact results.
description: 4 pages, 4 figures, 1 table, published version
A Review of Wireless Body Area Networks for Medical Applications
Creators: name: Ullah, Sana
name: Khan, Pervez
name: Ullah, Niamat
name: Saleem, Shahnaz
name: Higgins, Henry
name: Kwak, Kyung Sup
Publisher: name: arXiv
Year: 2010
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Recent advances in Micro-Electro-Mechanical Systems (MEMS) technology, integrated circuits, and wireless communication have allowed the realization of Wireless Body Area Networks (WBANs). WBANs promise unobtrusive ambulatory health monitoring for a long period of time and provide real-time updates of the patient's status to the physician. They are widely used for ubiquitous healthcare, entertainment, and military applications. This paper reviews the key aspects of WBANs for numerous applications. We present a WBAN infrastructure that provides solutions to on-demand, emergency, and normal traffic. We further discuss in-body antenna design and low-power MAC protocol for WBAN. In addition, we briefly outline some of the WBAN applications with examples. Our discussion realizes a need for new power-efficient solutions towards in-body and on-body sensor networks.
description: 7 pages, 7 figures, and 3 tables. In V3, the manuscript is converted to LaTeX
Indirect determination of the Kugo-Ojima function from lattice data
Creators: name: Aguilar, A. C.
name: Binosi, D.
name: Papavassiliou, J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the structure and non-perturbative properties of a special Green's function, u(q), whose infrared behavior has traditionally served as the standard criterion for the realization of the Kugo-Ojima confinement mechanism. It turns out that, in the Landau gauge, u(q) can be determined from a dynamical equation, whose main ingredients are the gluon propagator and the ghost dressing function, integrated over all physical momenta. Using as input for these two (infrared finite) quantities recent lattice data, we obtain an indirect determination of u(q). The results of this mixed procedure are in excellent agreement with those found previously on the lattice, through a direct simulation of this function. Most importantly, in the deep infrared the function deviates considerably from the value associated with the realization of the aforementioned confinement scenario. In addition, the dependence of u(q), and especially of its value at the origin, on the renormalization point is clearly established. Some of the possible implications of these results are briefly discussed.
description: 25 pages, 10 figures; v2: typos corrected, expanded version that matches the published article
Two Type Ic supernovae in low-metallicity, dwarf galaxies: diversity of explosions
Creators: name: Young, D. R.
name: Smartt, S. J.
name: Valenti, S.
name: Pastorello, A.
name: Benetti, S.
name: Benn, C. R.
name: Bersier, D.
name: Botticella, M. T.
name: Corradi, R. L. M.
name: Harutyunyan, A. H.
name: Hrudkova, M.
name: Hunter, I.
name: Mattila, S.
name: de Mooij, E. J. W.
name: Navasardyan, H.
name: Snellen, I. A. G.
name: Tanvir, N. R.
name: Zampieri, L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present BVRI photometry and optical spectroscopy of two Type Ic supernovae SN 2007bg and SN 2007bi discovered in wide-field, non-targeted surveys and associated with sub-luminous blue dwarf galaxies. Neither SNe 2007bg nor 2007bi were found in association with an observed GRB, but are found to inhabit similar low-metallicity environments as GRB associated supernovae. The radio-bright SN 2007bg is hosted by an extremely sub-luminous galaxy of magnitude MB = -12.4+/-0.6 mag with an estimated oxygen abundance of 12+log(O/H) = 8.18+/-0.17. The lightcurve of SN 2007bg displays one of the fastest post-maximum decline rates of all broad-lined Type Ic supernovae known to date and, when combined with its high expansion velocities, a high kinetic energy to ejected mass ratio (E_K/Mej ~ 2.7). We show that SN 2007bi is possibly the most luminous Type Ic known, reaching a peak magnitude of MR ~ 21.3 mag and displays a remarkably slow decline, following the radioactive decay rate of 56Co to 56Fe throughout the course of its observed lifetime. From a simple model of the bolometric light curve of SN 2007bi we estimate a total ejected 56Ni mass of M_Ni = 3.5 - 4.5 solar masses, the largest 56Ni mass measured in the ejecta of a supernova to date. There are two models that could explain the high luminosity and large ejected 56Ni mass. One is a pair-instability supernova (PISN) which has been predicted to occur for massive stars at low metallicities. We measure the host galaxy metallicity of SN 2007bi to be 12 + log(O/H) = 8.15+/-0.15 which is somewhat high to be consistent with the PISN model. An alternative is the core-collapse of a C+O star of 20 - 40 solar masses which is the core of a star of originally 50 - 100 solar masses. (Abridged)
description: Minor changes. 19 pages, 21 Figures. Accepted by A&A
Supplementary document for High-speed femtosecond UV laser writing of low-loss waveguides in fused silica - 7412577.pdf
Creators: name: Ackermann, Lisa
name: Hermann, Benedikt
name: Echarri, Daniel
name: Gribaudo, Ernesto
name: Bellouard, Yves
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Supplemental Document
Supplementary document for Silicon polarization beam splitter based on cascaded multimode anti-symmetric apodized Bragg gratings for 1.55 and 2 μm wavebands - 7413641.pdf
Creators: name: Zhang, Liang
name: Cheng, Guanglian
name: Yi, Qiyuan
name: Shen, Zengfan
name: Yan, Zhiwei
name: Li, qiyuan
name: Xiong, Xinzhe
name: Zheng, Shuang
name: Shuai, Cui
name: Yu, Yuan
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Supplemental Document 1
COVID-19 THREAT EMOTIONAL CONTAGION AND FEAR
Creators: name: Prince, Melvin
name: Kim, Young
Publisher: name: figshare
Year: 2021
Subjects: Applied Psychology

description: Fear of COVID-19 has been understandably widespread given continual exposure to dire information from pandemic media coverage and interpersonal communications. The current project explored individual threat appraisal and emotional contagion conducive to COVID-19 fear.
Lithium abundances of Main Sequence and Sub-Giant stars in the Globular Cluster NGC 6397
Creators: name: Hernández, J. I. González
name: Bonifacio, P.
name: Caffau, E.
name: Steffen, M.
name: Ludwig, H. -G.
name: Behara, N.
name: Sbordone, L.
name: Cayrel, R.
name: Zaggia, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present FLAMES/GIRAFFE spectroscopy obtained at the Very Large Telescope (VLT). Using these observations we have been able for the first time to observe the Li I doublet in the Main Sequence stars of a Globular Cluster. We also observed Li in a sample of Sub-Giant stars of the same B-V colour. Our final sample is composed of 84 SG stars and 79 MS stars. In spite of the fact that SG and MS span the same temperature range we find that the equivalent widths of the Li I doublet in SG stars are systematically larger than those in MS stars, suggesting a higher Li content among SG stars. This is confirmed by our quantitative analysis which makes use of both 1D and 3D model atmospheres. We find that SG stars show, on average, a Li abundance higher by 0.1 dex than MS stars. We also detect a positive slope of Li abundance with effective temperature, the higher the temperature the higher the Li abundance, both for SG and MS stars, although the slope is slightly steeper for MS stars. These results provide an unambigous evidence that the Li abundance changes with evolutionary status. The physical mechanisms that contribute to this are not yet clear, since none of the proposed models seem to describe accurately the observations. Whether such mechanism can explain the cosmological lithium problem, is still an open question.
description: Proceedings of the poster contribution presented at the IAU Symposium 266
Fuzziness at the horizon
Creators: name: Batic, Davide
name: Nicolini, Piero
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the stability of the noncommutative Schwarzschild black hole interior by analysing the propagation of a massless scalar field between the two horizons. We show that the spacetime fuzziness triggered by the field higher momenta can cure the classical exponential blue shift divergence, suppressing the emergence of infinite energy density in a region nearby the Cauchy horizon.
description: 4 pages, 1 figure, new version matching that accepted for publication
Folke- og førtidspension
Creators: Danmarks Statistik
Publisher: name: Rigsarkivet
Year: 2022

description: Formålet med folke- og førtidspensionsstatistikkener, at belyse antal modtagere af social pension opdelt på modtagere af folkepension, førtidspension og invaliditetsydelse samt den udbetalte ydelse.
Programmable photon pair source
Creators: name: Cui, Liang
name: Wang, Jinjin
name: Li, Jiamin
name: Ma, Mingyi
name: Ou, Z. Y.
name: Li, Xiaoying
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Photon pairs produced by the pulse-pumped nonlinear parametric processes have been a workhorse of quantum information science. Engineering the spectral property of the photon pairs is crucial in practical applications. In this article, we demonstrate a programmable photon pair source by exploiting a two-stage nonlinear interferometer with a phase-control device. The phase-control device introduces phase shifts by a programmable phase function that can be arbitrarily defined. With a properly designed phase function, the output spectrum of the source can be freely customized and changed without replacing any hardware component in the system. In addition to demonstrating the generation of photon pairs with factorable, positively-correlated, and negatively-correlated spectra, respectively, we show that the output of the source can be tailored into multi-channel spectrally factorable photon pairs without sacrificing efficiency. Such a source, having the ability to modify the spectrum of the photon pairs at will according to the chosen application, is a powerful tool for quantum information science.
title: Experiencias ciberperiodísticas en la elaboración de reportajes: comunicación multimedia, transmedia e inteligencia artificial
title: Cyberjournalistic experiences in the preparation of reports: multimedia communication, transmedia and artificial intelligence
titleType: AlternativeTitle
Creators: name: Apablaza-Campos, Alexis
Publisher: name: Zenodo
Year: 2023
Subjects: inteligencia artificial
ia
ChatGPT
medios digitales
cibermedios
periodismo
periodismo de datos
comunicación multimedia
transmedia
artificial intelligence
AI
digital news media
cybermedia
journalism

description: Resumen

Ejemplos de reportajes multimedia más leídos en el mundo.

Casos destacados de periodismo de datos.

Herramientas y recursos para periodistas digitales.

Definiciones de inteligencia artificial y sus principales usos en medios de comunicación.

Diferenciación (con ejemplos) del concepto de IA con la automatización de contenidos.

Experiencias periodísticas en ChatGPT.

Listado de herramientas de IA útiles para periodistas, estudiantes de Periodismo u otras áreas relacionadas con la comunicación social.

Conclusiones principales sobre el valor del desarrollo de herramientas de inteligencia artificial y sobre sus desafíos pendientes.

Abstract

Examples of the most read multimedia reports in the world.

Outstanding cases of data journalism.

Tools and resources for digital journalists.

Definitions of artificial intelligence and its main uses in the media.

Differentiation (with examples) of the concept of AI with content automation.

Journalistic experiences in ChatGPT.

List of useful AI tools for journalists, students of Journalism or other areas related to social communication.

Main conclusions about the value of developing artificial intelligence tools and their pending challenges.
description: Contexto: presentación a estudiantes del curso "Estructura narrativa del discurso en entorno multimedia" del Máster Universitario en Periodismo Multimedia de la Universidad Internacional de Valencia.
Kraus e/o Shakespeare. Intertestualità in prospettiva: tradurre, citare, inscrivere
Creators: name: Fantappiè, Irene <1981>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: L-FIL-LET/14 Critica letteraria e letterature comparate

description: The thesis focuses on Karl Kraus’s rewritings of some Shakespeare plays and copes with the concepts of “translation” and “quotation” as commensurable forms of
intertextuality. Building his Shakespeare’s Bearbeitungen as a montage of quotations of previous German translations, Karl Kraus creates a new kind of hybrid intertextuality that goes beyond the boundaries between quotation and translation. In my opinion, Karl Kraus understands quotation and translation as spatial concepts: in his rewritings he puts Shakespeare’s text into his geometrical and critical “perspective”. The thesis focuses also on the evolution of quotation and translation in Karl Kraus’s work: even maintaining their satirical and destruens function, they develop an “affirmative” role and are used in order to redefine the literary canon. The thesis investigates this form of intertextuality from a comparative point of view, referring to the translation studies (Hermans, Bassnett, Lefevere, Apel, Berman, Meschonnic), theories of intertextuality (Genette, Barthes, Worton, Orr), studies on quotation and montage (Compagnon; Möbius, Hage), and studies on Karl Kraus (Kraft, Ribeiro, Scheichl, Fischer, Timms, Canetti and the famous essay of Walter Benjamin). It also contains a survey of Theater der Dichtung’s historical framework and several comparisons between Karl Kraus’s and other early 20th translations of
Shakespeare’s plays.
title: Geochemical characterisation of Māori artefacts from Kawhia Museum, New Zealand using pXRF
Creators: name: Rogers, Karyne M.
name: Thomson, John
name: Campbell, Hamish J.
name: Mahara, Boss
name: McLeod, Oliver
name: Bradshaw, Diane
Publisher: name: GNS Science
Year: 2021

description: Non-destructive portable X-ray fluorescence spectroscopy (pXRF) was used to geochemically characterise 160 indigenous Māori stone artefacts residing in the Kāwhia Museum. Geochemical comparisons were made to determine relationships between artefacts and assign lithology and origin based on their elemental composition. The most abundant artefacts were toki (adzes, 80 samples), made of either argillite (48 samples) or basalt (32 samples) rock, but also included obsidian flakes, sinker stones, patu and patu ōnewa. Key rock types included andesite, argillite, basalt, chert, ignimbrite, limestone, pounamu (or greenstone) and sandstone, as well as volcanic glass (obsidian and pitchstone). Multi-element chemometrics using Partial Least Square Discriminant Analysis (PLS DA) was successfully used to classify and group museum artefacts based on their geochemical composition. Hierarchical clustering was used to determine formation relationships within lithology types. The geochemical diversity of materials suggests both local sources and distant geographical origins of these artefacts, indicating population mobility within the district and regular social interaction with iwi groups residing elsewhere. (auth)
Fractional Vector Calculus and Fractional Maxwell's Equations
Creators: name: Tarasov, Vasily E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The theory of derivatives and integrals of non-integer order goes back to Leibniz, Liouville, Grunwald, Letnikov and Riemann. The history of fractional vector calculus (FVC) has only 10 years. The main approaches to formulate a FVC, which are used in the physics during the past few years, will be briefly described in this paper. We solve some problems of consistent formulations of FVC by using a fractional generalization of the Fundamental Theorem of Calculus. We define the differential and integral vector operations. The fractional Green's, Stokes' and Gauss's theorems are formulated. The proofs of these theorems are realized for simplest regions. A fractional generalization of exterior differential calculus of differential forms is discussed. Fractional nonlocal Maxwell's equations and the corresponding fractional wave equations are considered.
description: 42 pages, LaTeX
Supplementary document for Three-dimensional shear stress measurement of stress waves in silica glass induced by femtosecond laser - 7431460.pdf
Creators: name: Tokumi, Kenta
name: Hattori, Junya
name: Sun, Huijie
name: Ren, Guoqi
name: Sugita, Naohiko
name: Ito, Yusuke
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Supplement 1
A novel phase variation mechanism in the meningococcus driven by a ligand-responsive repressor and differential spacing of distal promoter elements
Creators: name: Metruccio, Matteo Maria Emiliano <1979>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: BIO/11 Biologia molecolare

description: Phase variable expression, mediated by high frequency reversible changes in the length of simple sequence repeats, facilitates adaptation of bacterial populations to changing environments and is frequently important in bacterial virulence. Here we elucidate a novel phase variable mechanism for NadA expression, an adhesin and invasin of Neisseria meningitidis. The NadR repressor protein binds to operators flanking the phase variable tract of the nadA promoter gene and contributes to the differential expression levels of phase variant promoters with different numbers of repeats, likely due to different spacing between operators. It is shown that IHF binds between these operators, and may permit looping of the promoter, allowing interaction of NadR at operators located distally or overlapping the promoter. The 4-hydroxyphenylacetic acid, a metabolite of aromatic amino acid catabolism that is secreted in saliva, induces nadA expression by inhibiting the DNA binding activity of the NadR repressor. When induced, only minor differences are evident between NadR-independent transcription levels of promoter phase variants, which are likely due to differential RNA polymerase contacts leading to altered promoter activity. These results suggest that NadA expression is under both stochastic and tight environmental-sensing regulatory control, and both regulations are mediated by the NadR repressor that and may be induced during colonization of the oropharynx where it plays a major role in the successful adhesion and invasion of the mucosa. Hence, simple sequence repeats in promoter regions may be a strategy used by host-adapted bacterial pathogens to randomly switch between expression states that may nonetheless still be induced by appropriate niche-specific signals.
Cultura "Open" e nuovi modelli normativi per la gestione della conoscenza
Open Culture and normative models for knowledge management
Creators: name: Rocchi, Alessandro <1975>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: IUS/20 Filosofia del diritto

description: L'obiettivo della ricerca è di compiere un'analisi dell'impatto della cosiddetta cultura "open" alla luce dell'attuale condizione del World Wide Web.
Si prenderà in considerazione, in particolare, la genesi del movimento a partire dalle basi di cultura hacker e la relativa evoluzione nella filosofia del software libero, con il fine ultimo di identificare il ruolo attuale del modello open source nello scenario esistente.
L'introduzione al concetto di Open Access completerà la ricerca anche considerando la recente riaffermazione della conoscenza come bene comune all'interno della Società dell'Informazione
description: The object of this study is the analysis of the impact of "open culture" in the light of current World Wide Web. By addressing the main aspects that arise from the developement of hacker culture and free software philosophy, the research aim at identifying the effective role of the open source model in the current scenario.
A survey of Open Access movement will complete the analysis also considering the recent restatement of "knowledge" as a commons in the Information Society.
Estimation of Ranked Set Sampling Methods Comparative Study
Creators: name: Medhat, Nuran
Publisher: name: figshare
Year: 2021
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: 10405 Statistical Theory

description: In environmental monitoring and assessment, the main focus is to achieve observationaleconomy and to collect data with unbiased, efficient and cost effective samplingmethods. Ranked set sampling (RSS) is one traditional method that is mostly used for accomplishingobservational economy. In this article, quartile double ranked set sampling(QDRSS) is compare to different ranked set sampling methods which are useful to estimatethe populationmean based on simple random sampling (SRS) method. When the underlyingdistributions are symmetric and asymmetric, it turns out that quartile double RSS(QDRSS) produce unbiased estimator is more efficient than SRS, paired RSS (PPRSS),extreme RSS (ERSS), median RSS (MRSS), double RSS (DRSS), quartile RSS (QRSS),percentile RSS (PRSS), paired double RSS (PPDRSS) and RSS based on the sample size.It is shown that, the variance of the mean estimator under QDRSS is always less than thevariance of the mean estimator based on SRS and the other methods.
Phytoplankton Response to Environmental Variables and Organic Pollutants. Laboratory Cultures and Numerical Simulations Experiments
Creators: name: Fiori, Emanuela <1984>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: BIO/01 Botanica generale

description: Herbicides are becoming emergent contaminants in Italian surface, coastal and ground waters, due to their intensive use in agriculture. In marine environments herbicides have adverse effects on non-target organisms, as primary producers, resulting in oxygen depletion and decreased primary productivity. Alterations of species composition in algal communities can also occur due to the different sensitivity among the species. In the present thesis the effects of herbicides, widely used in the Northern Adriatic Sea, on different algal species were studied. The main goal of this work was to study the influence of temperature on algal growth in the presence of the triazinic herbicide terbuthylazine (TBA), and the cellular responses adopted to counteract the toxic effects of the pollutant (Chapter 1 and 2). 
The development of simulation models to be applied in environmental management are needed to organize and track information in a way that would not be possible otherwise and simulate an ecological prospective. The data collected from laboratory experiments were used to simulate algal responses to the TBA exposure at increasing temperature conditions (Chapter 3).
Part of the thesis was conducted in foreign countries. The work presented in Chapter 4 was focused on the effect of high light on growth, toxicity and mixotrophy of the ichtyotoxic species Prymnesium parvum.
In addition, a mesocosm experiment was conducted in order to study the synergic effect of the pollutant emamectin benzoate with other anthropogenic stressors, such as oil pollution and induced phytoplankton blooms (Chapter 5).