cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Measuring Cs-137 activity in spent nuclear fuel: Presented in a Fission Diagnostics and Safeguards group meeting
Creators: name: Jansson, Peter
Publisher: name: Zenodo
Year: 2021
Subjects: spent nuclear fuel
Cs-137
activity
gamma scan

description: A method to estimate the activity of 137Cs activity in spent nuclear fuel assemblies (SNF), published in reference [1], was presented. The activity of 137Cs in SNF can be estimated using traditional gamma scanning, with a calibration source added and correcting for detection efficiencies. In a test of the method, we demonstrated that a deviation from a linear correlation between measured and calculated 137Cs activity might indicate erroneously assumed SNF parameters or operating history. References [1] Bengtsson M., Jansson P., Bäckström U., Johansson F., Sjöland A., "Experimental method for verification of calculated Cs-137 content in nuclear fuel assemblies", Journal: Nuclear Technology, DOI: 10.1080/00295450.2021.1880851, 2021.
Role of ISSR Markers for Conservation of Rhanterium eppaposum Oliv. in Kuwait.
Creators: name: Habibi, Nazima
name: Salameen, Fadila Al
Publisher: name: figshare
Year: 2021
Subjects: subject: 60207 Population Ecology
subject: FOS: Biological sciences

description: Assessment of genetic diversity plays an important role in conservation management and desert rehabilitation. Molecular markers have proved to be a very powerful tool in characterizing, genotyping, and estimating genetic diversity in plants. Inter-simple sequence repeats (ISSR) are PCR based molecular markers with high degree of efficiency and precision to uncover differences among individual specimens. Rhanterium epapposum Oliv. (commonly known as Arfaj in Kuwait, and other Arab countries) is the national flower of Kuwait and is one of the most palatable forage plant grazed extensively by sheep and camels. It also has medicinal properties. The population of species is disappearing from the Kuwaiti desert at an alarming rate due to climatic change and human causes. Therefore, effective measures are needed to conserve this species to save it from extinction in the near future. In the current study, attempts were made to determine the genetic diversity using ISSR markers. Samples collected from six desert locations namely, Al Kabd, Sabah Al Ahmed Nature Reserve (SANR), Al Salmi, Mina Abdullah, Om Qaser, and Al Maqwa, were tested with 17 ISSR primers. This technique was found to be highly discriminatory. Genetic differences among the samples were estimated. The results were further explored to formulate conservation strategies of R. epapposum.
Græcissare: Ancient Greek Loanwords in the LiLa Knowledge Base of Linguistic Resources for Latin
Creators: name: Franzini, Greta
name: Zampedri, Federica
name: Passarotti, Marco Carlo
name: Mambrini, Francesco
name: Moretti, Giovanni
Publisher: name: Zenodo
Year: 2021
Subjects: Latin
Ancient Greek loans
Linguistic Linked Open Data

description: This poster presentation describes the addition of an index of 1,763 Ancient Greek loanwords to the collection of Latin lemmas of the LiLa: Linking Latin Knowledge Base of interoperable linguistic resources. This lexical resource increases LiLa’s lemma count and tunes its underlying data model to etymological borrowing.
Band structure and optical properties of opal photonic crystals
Creators: name: Pavarini, E.
name: Andreani, L. C.
name: Soci, C.
name: Galli, M.
name: Marabelli, F.
name: Comoretto, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: A theoretical approach for the interpretation of reflectance spectra of opal photonic crystals with fcc structure and (111) surface orientation is presented. It is based on the calculation of photonic bands and density of states corresponding to a specified angle of incidence in air. The results yield a clear distinction between diffraction in the direction of light propagation by (111) family planes (leading to the formation of a stop band) and diffraction in other directions by higher-order planes (corresponding to the excitation of photonic modes in the crystal). Reflectance measurements on artificial opals made of self-assembled polystyrene spheres are analyzed according to the theoretical scheme and give evidence of diffraction by higher-order crystalline planes in the photonic structure.
description: to appear in PRB
Stochastic Porous Media Equation and Self-Organized Criticality
Creators: name: Barbu, Viorel
name: Da Prato, Giuseppe
name: Röckner, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 76S05, 60H15

description: The existence and uniqueness of nonnegative strong solutions for stochastic porous media equations with noncoercive monotone diffusivity function and Wiener forcing term is proven. The finite time extinction of solutions with high probability is also proven in 1-D. The results are relevant for self-organized critical behaviour of stochastic nonlinear diffusion equations with critical states.
description: 29 pages, BiBoS-Preprint No. 07-11-268
Angolo di direzione ed azimut del decumano massimo di Augusta Taurinorum
Creators: name: Sparavigna, Amelia Carolina
Publisher: name: Zenodo
Year: 2019
Subjects: GPS
Roman Varatio
Archaeotopography
Satellite Imagery
UTM

description: Le nuove tecnologie legate all’uso di GPS e satelliti hanno rivoluzionato il modo di ottenere, elaborare e proporre i dati topografici. L’uso di tali risorse tecnologiche richiede le dovute cautele, in particolare per quanto riguarda la valutazione degli angoli di direzione, da cui si possono ottenere gli azimut legati alle direzioni geografiche. Questi azimut sono utili in analisi di orientazioni di antichi edifici o insediamenti, come ad esempio nell'analisi della varatio delle città romane. Nella discussione si proporrà un esempio specifico: l'analisi della direzione del decumano massimo di Augusta Taurinorum, l’odierna via Garibaldi di Torino.
Picosecond two-photon absorption laser induced fluorescence (ps-TALIF) in krypton: the role of photoionization on the density depletion of the fluorescing state Kr 5p'[3/2]$_2$
Creators: name: Gazeli, K.
name: Aubert, X
name: Prasanna, S
name: Duluard, C.
name: Lombardi, G.
name: Hassouni, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The present study focuses on the application of a picosecond (ps) TALIF technique in krypton (Kr) at variable pressure (0.1-10 mbar). The laser intensity (I, units W.cm$^{-2}$) is tuned between 1 and 480 MW.cm$^{-2}$, and the depletion of the density of the Kr 5p'[3/2]$_2$ fluorescing state through photoionization (PIN) and amplified stimulated emission (ASE) is investigated. This is done by combining TALIF experiments with a simple 0D numerical model. We demonstrate that for a gas pressure of 3 mbar and 15 < $\le$ 480 MW.cm$^{-2}$, a saturated fluorescence signal is obtained, which is largely attributed to PIN, ASE being negligible. Also, a broadening of the two-photon absorption line (i.e. 4p$^6$ $^1$S0$\to$5p'[3/2]$_2$) is recorded due to the production of charged species through PIN, inducing a Stark effect. For I$\le$15 MW.cm$^{-2}$, though, PIN is significantly limited, the absorption line is noticeably narrowed, and the quadratic dependence of the TALIF signal intensity versus the laser energy is obtained. Thus, in this case, the investigated Kr TALIF scheme, using the 5p'[3/2]$_2\to$5s[3/2]$_1$ fluorescence channel, can be used for calibration purposes in ps-TALIF experiments. These results are of interest for fundamental research since most ps-TALIF studies performed in Kr do not investigate in detail the role of PIN and ASE on the depletion of the Kr 5p'[3/2]$_2$ state density. Moreover, this work contributes to the development of ps-TALIF for determining absolute densities and quenching coefficients of H and N atoms in plasmas. This is useful in numerous plasma-based applications (e.g. thin film synthesis, biomedical treatments, plasma-assisted combustion, ...), for which the knowledge of the density/kinetics of reactive atoms is essential.
Storage and retrieval of single photons transmitted between remote quantum memories
Creators: name: Chaneliere, T.
name: Matsukevich, D. N.
name: Jenkins, S. D.
name: Lan, S. -Y.
name: Kennedy, T. A. B.
name: Kuzmich, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An elementary quantum network operation involves storing a qubit state in an atomic quantum memory node, and then retrieving and transporting the information through a single photon excitation to a remote quantum memory node for further storage or analysis. Implementations of quantum network operations are thus conditioned on the ability to realize such matter-to-light and/or light-to-matter quantum state mappings. Here, we report generation, transmission, storage and retrieval of single quanta using two remote atomic ensembles. A single photon is generated from a cold atomic ensemble at Site A via the protocol of Duan, Lukin, Cirac, and Zoller (DLCZ) [Nature v.414, 413 (2001)] and is directed to Site B through a 100 meter long optical fiber. The photon is converted into a single collective excitation via the dark-state polariton approach of Fleischhauer and Lukin [Phys. Rev. Lett. v.84, 5094 (2000)]. After a programmable storage time the atomic excitation is converted back into a single photon. This is demonstrated experimentally, for a storage time of 500 nanoseconds, by measurement of an anticorrelation parameter a. Storage times exceeding ten microseconds are observed by intensity cross-correlation measurements. The length of the storage period is two orders of magnitude longer than the time to achieve conversion between photonic and atomic quanta. The controlled transfer of single quanta between remote quantum memories constitutes an important step towards distributed quantum networks.
description: 15 pages, 6 figures
PHYTOCHEMICAL COMPOSITION OF PINUS NIGRA ARN. UNRIPE SEEDS FROM BULGARIA
Creators: name: Fidan, Hafize
name: Stankov, Stanko
name: Stoyanova, Magdalena
name: Petkova, Zhana
name: Petkova, Nadezhda
name: Stoyanova, Albena
Publisher: name: Zenodo
Year: 2021
Subjects: black pine, P. nigra, phytochemical, activity, potential

description: Black pine (Pinus nigra Arn.) is found in Central and Southern Europe, Southwest Asia, the Balkan Peninsula, including Bulgaria's territory. The present paper aimed to investigate the phytochemical composition of unripe black pine seeds obtained from Bulgaria. Lipid fraction, was evaluated in unripe seeds, and cellulose, total carbohydrates, glucose, fructose, and sucrose were evaluated in seedcakes. The major fatty acid identified in the P. nigra seed oil was the unsaturated linoleic acid (44.2%), followed by the saturated palmitic acid (31.2%). The amount of unsaturated pinolenic (10.5%) and oleic acids (8.8%) was also rather high. The amino acid composition of the protein fraction of seedcakes was also determined. The amino acid composition was represented mainly by arginine (8.74 mg/g), phenylalanine (7.84 mg/g), lysine (7.50%), tryptophan (6.42 mg/g), valine (6.13 mg/g), isoleucine (6.00 mg/g), leucine (1.18 mg/g), and methionine (1.13 mg/g). The mineral content (N, P, K, Mg, Na, and Cu) of seedcakes was evaluated, as the amount of K (8048.00 mg/kg) and Mg (172.99 mg/kg) were the highest in the samples. These findings emphasized the potential use of the unripe black pine seeds as an alternative source of bioactive components in different areas due to their phytochemical importance and values.
In-situ frequency tuning of photons stored in a high Q microwave cavity
Creators: name: Sandberg, M.
name: Wilson, C. M.
name: Persson, F.
name: Johansson, G.
name: Shumeiko, V.
name: Duty, T.
name: Delsing, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Photons are fundamental excitations of the electromagnetic field and can be captured in cavities. For a given cavity with a certain size, the fundamental mode has a fixed frequency f which gives the photons a specific "colour". The cavity also has a typical lifetime tau, which results in a finite linewidth delta f}. If the size of the cavity is changed fast compared to tau, and so that the frequency change Delta f >> delta f, then it is possible to change the "colour" of the captured photons. Here we demonstrate superconducting microwave cavities, with tunable effective lengths. The tuning is obtained by varying a Josephson inductance at one end of the cavity. We show tuning by several hundred linewidths in a time Delta t << tau. Working in the few photon limit, we show that photons stored in the cavity at one frequency will leak out from the cavity with the new frequency after the detuning. The characteristics of the measured devices make them suitable for dynamic coupling of qubits.
description: 5 pages, 4 figures
Fate of domain walls in 5D gravitational theory with compact extra dimension
Creators: name: Abe, Hiroyuki
name: Aoki, Shuntaro
name: Asai, Yu
name: Sakamura, Yutaka
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We pursue the time evolution of the domain walls in 5D gravitational theory with a compact extra dimension by numerical calculation. In order to avoid a kink-antikink pair that decays into the vacuum, we introduce a topological winding in the field space. In contrast to the case of non-gravitational theories, there is no static domain-wall solution in the setup. In the case that the minimal value of the potential is non-negative, we find that both the 3D space and the extra dimension will expand at late times if the initial value of the Hubble parameter is chosen as positive. The wall width almost remains constant during the evolution. In other cases, the extra dimension diverges and the 3D space shrinks to zero at a finite time.
description: 24 pages, 13 figures
Batisweiler, Martin, Felmy, Karl-Christian, Kotowski, Norbert: Der ökumenische Patriarch Jeremias II. von Konstantinopel und die Anfänge des Moskauer Patriarchats
Creators: name: Vo.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 41 Nr. 4 (1992): Ökumenische Rundschau, Band 41, Heft 4
Semantic elicitation: Epistemic indefinites
Creators: name: Kipkoech, Linus
name: Bossi, Madeline
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: sgc

description: One .mp4 file and one .pdf file. Elicitation of epistemic indefinites to look at whether ignorance effects are tied to the speaker. Further probing of epistemic indefinites with singleton extensions.
Plaquette representation for 3D lattice gauge models: I. Formulation and perturbation theory
Creators: name: Borisenko, O.
name: Voloshin, S.
name: Faber, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We develop an analytical approach for studying lattice gauge theories within the plaquette representation where the plaquette matrices play the role of the fundamental degrees of freedom. We start from the original Batrouni formulation and show how it can be modified in such a way that each non-abelian Bianchi identity contains only two connectors instead of four. In addition, we include dynamical fermions in the plaquette formulation. Using this representation we construct the low-temperature perturbative expansion for U(1) and SU(N) models and discuss its uniformity in the volume. The final aim of this study is to give a mathematical background for working with non-abelian models in the plaquette formulation.
description: Latex, 31 pages, 5 figs
Role of elastic scattering in electron dynamics at ordered alkali overlayers on Cu(111)
Creators: name: Corriol, C.
name: Silkin, V. M.
name: Sanchez-Portal, D.
name: Arnau, A.
name: Chulkov, E. V.
name: Echenique, P. M.
name: von Hofe, T.
name: Kliewer, J.
name: Kroeger, J.
name: Berndt, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Scanning tunneling spectroscopy of p(2x2) Cs and Na ordered overlayers on Cu(111) reveals similar line widths of quasi two-dimensional quantum well states despite largely different binding energies. Detailed calculations show that 50% of the line widths are due to electron-phonon scattering while inelastic electron-electron scattering is negligible. A frequently ignored mechanism for ordered structures, i.e., enhanced elastic scattering due to Brillouin zone back folding, contributes the remaining width.
description: 4 pages, 2 figures, 1 table
Energy Conditions and Segre Classification of Phantom Fields
Creators: name: Santos, J.
name: Alcaniz, J. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recent discoveries in the field of observational cosmology have provided increasing evidence that the Universe is undergoing a late time acceleration, which has also stimulated speculations on the nature of the dark component responsible for such a phenomenon. Among several candidates discussed in the current literature, phantom fields, an exotic scalar field with a negative kinetic term and that violates most of the classical energy conditions, appear as a real possibility according to recent observational analysis. In this paper we examine the invariant characterization for the energy-momentum tensor of phantom fields through the Segre algebraic classification in the framework of general relativity. We also discuss some constraints which are imposed on the values of $V(ϕ)$ from the classical energy conditions.
description: 4 pages, 1 figure, to appear in Phys. Lett. B
Role of Berry curvature in the generation of spin currents in Rashba systems
Creators: name: Kapri, Priyadarshini
name: Dey, Bashab
name: Ghosh, Tarun Kanti
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the background (equilibrium), linear and nonlinear spin currents in 2D Rashba spin-orbit coupled systems with Zeeman splitting and in 3D noncentrosymmetric metals using modified spin current operator by inclusion of the anomalous velocity. The linear spin Hall current arises due to the anomalous velocity of charge carriers induced by the Berry curvature. The nonlinear spin current occurs due to the band velocity and/or the anomalous velocity. For 2D Rashba systems, the background spin current saturates at high Fermi energy (independent of the Zeeman coupling), linear spin current exhibits a plateau at the Zeeman gap and nonlinear spin currents are peaked at the gap edges. The magnitude of the nonlinear spin current peaks enhances with the strength of Zeeman interaction. The linear spin current is polarized out of plane, while the nonlinear ones are polarized in-plane. We witness pure anomalous nonlinear spin current with spin polarization along the direction of propagation. In 3D noncentrosymmetric metals, background and linear spin currents are monotonically increasing functions of Fermi energy, while nonlinear spin currents vary non-monotonically as a function of Fermi energy and are independent of the Berry curvature. These findings may provide useful information to manipulate spin currents in Rashba spin-orbit coupled systems.
description: 13 pages, 8 figures
VIBES: VIsual Binary Exoplanet survey with SPHERE Upper limits on wide S-planet and S-BD frequencies, triple system discovery, and astrometric confirmation of 20 stellar binaries and three triple systems
Creators: name: Hagelberg, J.
name: Engler, N.
name: Fontanive, C.
name: Daemgen, S.
name: Quanz, S. P.
name: Kühn, J.
name: Reggiani, M.
name: Meyer, M.
name: Jayawardhana, R.
name: Kostov, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent surveys indicate that planets in binary systems are more abundant than previously thought, which is in agreement with theoretical work on disc dynamics and planet formation in binaries. In order to measure the abundance and physical characteristics of wide-orbit giant exoplanets in binary systems, we have designed the 'VIsual Binary Exoplanet survey with Sphere' (VIBES) to search for planets in visual binaries. It uses the SPHERE instrument at VLT to search for planets in 23 visual binary and four visual triple systems with ages of <145 Myr and distances of <150 pc. We used the IRDIS dual-band imager on SPHERE to acquire high-contrast images of the sample targets. For each binary, the two components were observed at the same time with a coronagraph masking only the primary star. For the triple star, the tight components were treated as a single star for data reduction. This enabled us to effectively search for companions around 50 individual stars in binaries and four binaries in triples. We derived upper limits of $
description: Accepted for publication in Astronomy & Astrophysics on 18.09.2020 21 pages, 11 figures
The Benefit of Thresholding in LP Decoding of LDPC Codes
Creators: name: Feldman, Jon
name: Koetter, Ralf
name: Vontobel, Pascal O.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Consider data transmission over a binary-input additive white Gaussian noise channel using a binary low-density parity-check code. We ask the following question: Given a decoder that takes log-likelihood ratios as input, does it help to modify the log-likelihood ratios before decoding? If we use an optimal decoder then it is clear that modifying the log-likelihoods cannot possibly help the decoder's performance, and so the answer is "no." However, for a suboptimal decoder like the linear programming decoder, the answer might be "yes": In this paper we prove that for certain interesting classes of low-density parity-check codes and large enough SNRs, it is advantageous to truncate the log-likelihood ratios before passing them to the linear programming decoder.
description: To appear in Proc. 2005 IEEE International Symposium on Information Theory, Adelaide, Australia, September 4-9, 2005
The COMPASS spin physics program
Creators: name: Panebianco, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: One of the main aims of the COMPASS experiment at CERN is the study of the spin structure of the nucleon and in particular the determination of the gluon polarization in the nucleon. We present some new results of 2002-2003 data analysis. They concern a precise measurement of the deuteron structure function g1 at small x, some preliminary result on Collins and Sivers asymmetries which are linked to transversity and a new measurement of DeltaG/G.
description: 4 pages, Moriond-QCD 2005 conference proceedings
On the happiness of ferroelectric surfaces and its role in water dissociation: the example of bismuth ferrite
Creators: name: Efe, Ipek
name: Spaldin, Nicola A.
name: Gattinoni, Chiara
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate, using density functional theory, how the interaction between the ferroelectric polarization and the chemical structure of the (001) surfaces of bismuth ferrite influences the surface properties and reactivity of this material. A precise understanding ofthe surface behavior of ferroelectrics is necessary for their use in surface science applications such as catalysis as well as for their incorporation in microelectronic devices. Using the (001) surface of bismuth ferrite as a model system we show that the most energetically favoured surface geometries are combinations of surface termination and polarization direction that lead to uncharged, stable surfaces. On the unfavorable charged surfaces, we explore the compensation mechanisms of surface charges provided by the introduction of point defects and adsorbates, such as water. Finally, we propose that the special surface properties of bismuth ferrite (001) could be used to produce an effective water splitting cycle through cyclic polarization switching.
description: The following article has been submitted to the Journal of Chemical Physics
Thermostatistics with an Invariant Infrared Cutoff
Creators: name: Roushan, M.
name: Nozari, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum gravitational effects may affect the large scale dynamics of the universe. Phenomenologically, quantum gravitational effect at large distances can be encoded in an extended uncertainty principle that admits a minimal measurable momentum/energy or a maximal length. This maximal length can be considered as the size of the cosmological horizon today. In this paper we study thermostatistics of an expanding universe as a gaseous system and in the presence of an invariant infrared cutoff. We also compare the thermostatistics of different eras of the evolution of the universe in two classes, Fermions and Bosons.
A Nonequilibrium Information Entropy Approach to Ternary Fission of Actinides
Creators: name: Röpke, G.
name: Natowitz, J. B.
name: Pais, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Ternary fission of actinides probes the state of the nucleus at scission. Light clusters are produced in space and time very close to the scission point. Within the nonequilibrium statistical operator method, a generalized Gibbs distribution is constructed from the information given by the observed yields of isotopes. Using this relevant statistical operator, yields are calculated taking excited states and continuum correlations into account, in accordance with the virial expansion of the equation of state. Clusters with mass number $A \le 10$ are well described using the nonequilibrium generalizations of temperature and chemical potentials. Improving the virial expansion, in-medium effects may become of importance in determining the contribution of weakly bound states and continuum correlations to the intrinsic partition function. Yields of larger clusters, which fail to reach this quasi-equilibrium form of the relevant distribution, are described by nucleation kinetics, and a saddle-to-scission relaxation time of about 7000 fm/c is inferred. Light charged particle emission, described by reaction kinetics and virial expansions, may therefore be regarded as a very important tool to probe the nonequilibrium time evolution of actinide nuclei during fission.
description: 5 pages, 1 figure
Modeling epidemics through ladder operators
Creators: name: Bagarello, F.
name: Gargano, F.
name: Roccati, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: We propose a simple model of spreading of some infection in an originally healthy population which is different from other models existing in the literature. In particular, we use an operator technique which allows us to describe in a natural way the possible interactions between healthy and un-healthy populations, and their transformation into recovered and to dead people. After a rather general discussion, we apply our method to the analysis of Chinese data for the SARS-2003 (Severe acute respiratory syndrome; SARS-CoV-1) and the Coronavirus COVID-19 (Corona Virus Disease; SARS-CoV-2 ) and we show that the model works very well in reproducing the long-time behaviour of the disease, and in particular in finding the number of affected and dead people in the limit of large time. Moreover, we show how the model can be easily modified to consider some lockdown measure, and we deduce that this procedure drastically reduces the asymptotic value of infected individuals, as expected, and observed in real life.
Fractional dark energy
Creators: name: Landim, Ricardo G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we introduce the fractional dark energy model, in which the accelerated expansion of the Universe is driven by a nonrelativistic gas (composed by either fermions or bosons) with a noncanonical kinetic term. The kinetic energy is inversely proportional to the cube of the absolute value of the momentum for a fluid with an equation of state parameter equal to minus one, and whose corresponding energy density mimics the one of the cosmological constant. In the general case, the dark energy equation of state parameter (times three) is precisely the exponent of the momentum in the kinetic term. We show that this inverse momentum operator appears in fractional quantum mechanics and it is the inverse of the Riesz fractional derivative. The observed vacuum energy can be obtained through the integral of the Fermi-Dirac (or Bose-Einstein) distribution and the lowest allowed energy of the particles. Finally, a possible thermal production and fate of fractional dark energy is investigated.
description: 8 pages, 3 figures. Typos corrected. To appear in PRD
Ultrahigh-fidelity composite rotational quantum gates
Creators: name: Gevorgyan, Hayk
name: Vitanov, Nikolay V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Composite pulse sequences, which produce arbitrary pre-defined rotations of a qubit on the Bloch sphere, are presented. The composite sequences contain up to 17 pulses and can compensate up to eight orders of experimental errors in the pulse amplitude and the pulse duration. Composite sequences for three basic quantum gates -- X (NOT), Hadamard and arbitrary rotation -- are derived. Three classes of composite sequences are presented -- one symmetric and two asymmetric. They contain as their lowest members two well-known composite sequences -- the three-pulse symmetric SCROFULOUS pulse and the four-pulse asymmetric BB1 pulse, which compensate first and second-order errors, respectively. The shorter sequences are derived analytically, and the longer ones numerically (instead by nesting and concatenation, as mostly done hitherto). Consequently, the composite sequences derived here match or outperform the existing ones in terms of either speed or accuracy, or both. For example, we derive a second-order composite sequence, which is faster (by about 13\%) than the famous BB1 sequence. For higher-order sequences the speed-up becomes much more pronounced. This is important for quantum information processing as the sequences derived here provide more options for finding the sweet spot between ultrahigh fidelity and high speed.
description: 12 pages, 3 figures
Turbulent Details Simulation for SPH Fluids via Vorticity Refinement
Creators: name: Liu, Sinuo
name: Wang, Xiaokun
name: Ban, Xiaojuan
name: Xu, Yanrui
name: Zhou, Jing
name: Kosinka, Jiří
name: Telea, Alexandru C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: A major issue in Smoothed Particle Hydrodynamics (SPH) approaches is the numerical dissipation during the projection process, especially under coarse discretizations. High-frequency details, such as turbulence and vortices, are smoothed out, leading to unrealistic results. To address this issue, we introduce a Vorticity Refinement (VR) solver for SPH fluids with negligible computational overhead. In this method, the numerical dissipation of the vorticity field is recovered by the difference between the theoretical and the actual vorticity, so as to enhance turbulence details. Instead of solving the Biot-Savart integrals, a stream function, which is easier and more efficient to solve, is used to relate the vorticity field to the velocity field. We obtain turbulence effects of different intensity levels by changing an adjustable parameter. Since the vorticity field is enhanced according to the curl field, our method can not only amplify existing vortices, but also capture additional turbulence. Our VR solver is straightforward to implement and can be easily integrated into existing SPH methods.
Spectral Functions for Gauge Fields in Rindler-Like Spaces
Creators: name: Bytsenko, A. A.
name: Goncalves, A. E.
name: Mendes, V. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A class of conformal deformations of Rindler-like spaces is analyzed. We study the spectral properties of the Laplace operators associated with $p-$forms and acting in these spaces and in their spatial sections. The spectral density of continuum spectrum and the spectral zeta functions related to the abelian $p-$forms in real compact hyperbolic manifolds are obtained.
description: 6 pages. Work presented at the "Fourth International Winter Conference on Mathematical Methods in Physics", 09-13 August 2004, Rio de Janeiro, Brazil
Dynamic Bayesian Approach for decision-making in Ego-Things
Creators: name: Kanapram, Divya
name: Campo, Damian
name: Baydoun, Mohamad
name: Marcenaro, Lucio
name: Bodanese, Eliane L.
name: Regazzoni, Carlo
name: Marchese, Mario
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This paper presents a novel approach to detect abnormalities in dynamic systems based on multisensory data and feature selection. The proposed method produces multiple inference models by considering several features of the observed data. This work facilitates the obtainment of the most precise features for predicting future instances and detecting abnormalities. Growing neural gas (GNG) is employed for clustering multisensory data into a set of nodes that provide a semantic interpretation of data and define local linear models for prediction purposes. Our method uses a Markov Jump particle filter (MJPF) for state estimation and abnormality detection. The proposed method can be used for selecting the optimal set features to be shared in networking operations such that state prediction, decision-making, and abnormality detection processes are favored. This work is evaluated by using a real dataset consisting of a moving vehicle performing some tasks in a controlled environment.
description: IEEE 5th World Forum on Internet of Things at Limerick, Ireland
Structure and relaxation processes of an anisotropic molecular fluid confined into 1D nanochannels
Creators: name: Lefort, Ronan
name: Morineau, Denis
name: Guégan, Régis
name: Alain, Moréac
name: Ecolivet, Claude
name: Guendouz, Mohammed
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Structural order parameters of a smectic liquid crystal confined into the columnar form of porous silicon are studied using neutron scattering and optical spectroscopic techniques. It is shown that both the translational and orientational anisotropic properties of the confined phase strongly couple to the one-dimensional character of the porous silicon matrix. The influence of this confinement induced anisotropic local structure on the molecular reorientations occuring in the picosecond timescale is discussed.
Additional file 1 of PelD is required downstream of c-di-GMP for host specialization of Pseudomonas lurida
Creators: name: Czerwinski, Anna
name: Löwenstrom, Julia
name: Franzenburg, Sören
name: Groth, Espen Elias
name: Obeng, Nancy
name: Schulenburg, Hinrich
Publisher: name: figshare
Year: 2025
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics

description: Supplementary Material 1
Where Chaga Differs from Typical Eastern Bantu: How is it possible to relate to the study of language contact?
Creators: name: Shinagawa, Daisuke
Publisher: name: Zenodo
Year: 2019
Subjects: Languages of Tanzania
Pygmy peoples
Kilimanjaro Bantu
Language contact
Language typology
Morphosyntax
Phonology

description: The Kilimanjaro Bantu languages show several features which are typologically rare within the rest of Eastern Bantu, but can any of these be attributed to language contact with surrounding (or pre-existing) Bantu or non-Bantu languages? Beginning with apocrypha of pygmy peoples occupying Mount Kilimanjaro before the arrival of the Bantu people, and moving to typological comparison of languages both nearby and further afield, this talk explores the methods for identifying features as candidates for origins in contact, as well as examines three features peculiar in Kilimanjaro Bantu: post-nasal trill, Verb-Object-Negative ordering, and final vowel lengthening.
description: Note: This talk has not gone through a process of peer review, and findings should therefore be treated as preliminary and subject to change. Acknowledgement and citation: Shinagawa, Daisuke. 2019. Where Chaga differs from typical Eastern Bantu: How is it possible to relate to the study of language contact? Talk given at Workshop on Bantu in contact with non-Bantu, ILCAA, TUFS. 28/07/2019.
Knowledge, attitudes and practices towards clinical research among medical students at Ain Shams University, Egypt
Creators: name: Abdelrahman Ibrahim Abushouk
name: Abdelrahman Nazmy Hatata
name: Younis, Mohamed Mahmoud
name: Mansy, Khaled Fawzy El
name: Omran, Ibrahim Mahmoud
name: Awad, Abdullah Gad
name: Elezz, Nahla Fawzy Abu
Publisher: name: F1000Research
Year: 2015

description: Investigating student knowledge and attitudes and participation in clinical research at Ain Shams University
Vacuum type of SU(2) gluodynamics in maximally Abelian and Landau gauges
Creators: name: Chernodub, M. N.
name: Ishiguro, Katsuya
name: Mori, Yoshihiro
name: Nakamura, Yoshifumi
name: Polikarpov, M. I.
name: Sekido, Toru
name: Suzuki, Tsuneo
name: Zakharov, V. I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The vacuum type of SU(2) gluodynamics is studied using Monte-Carlo simulations in maximally Abelian (MA) gauge and in Landau (LA) gauge, where the dual Meissner effect is observed to work. The dual Meissner effect is characterized by the coherence and the penetration lengths. Correlations between Wilson loops and electric fields are evaluated in order to measure the penetration length in both gauges. The coherence length is shown to be fixed in the MA gauge from measurements of the monopole density around the static quark-antiquark pair. It is also shown numerically that a dimension 2 gluon operator A^+A^-(s) and the monopole density has a strong correlation as suggested theoretically. Such a correlation is observed also between the monopole density and A^2(s)= A^+A^-(s) + A^3A^3(s) condensate if the remaining U(1) gauge degree of freedom is fixed to U(1) Landau gauge (U1LA). The coherence length is determined numerically also from correlations between Wilson loops and A^+A^-(s) and A^2(s) in MA + U1LA gauge. Assuming that the same physics works in the LA gauge, we determine the coherence length from correlations between Wilson loops and A^2(s). Penetration lengths and coherence lengths in the two gauges are almost the same. The vacuum type of the confinement phase in both gauges is near to the border between the type 1 and the type 2 dual superconductors.
description: 13 pages, 22 figures, RevTeX 4 style
Reheating in small-field inflation on the brane: The Swampland Criteria and observational constraints in light of the PLANCK 2018 results
Creators: name: Osses, Constanza
name: Videla, Nelson
name: Panotopoulos, Grigoris
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study cosmological inflation and its dynamics in the framework of the Randall-Sundrum II brane model. In particular, we analyze in detail four representative small-field inflationary potentials, namely Natural inflation, Hilltop inflation, Higgs-like inflation, and Exponential SUSY inflation, each characterized by two mass scales. We constrain the parameters for which a viable inflationary Universe emerges using the latest PLANCK results. Furthermore, we investigate whether or not those models in brane cosmology are consistent with the recently proposed Swampland Criteria, and give predictions for the duration of reheating as well as for the reheating temperature after inflation. Our results show that (i) the distance conjecture is satisfied, (ii) the de Sitter conjecture and its refined version may be avoided, and (iii) the allowed range for the five-dimensional Planck mass, $M_5$, is found to be between $10^5~\textrm{TeV}$ and $10^{12}~\textrm{TeV}$. Our main findings indicate that non-thermal leptogenesis cannot work within the framework of RS-II brane cosmology, at least for the inflationary potentials considered here.
description: 57 pages, 13 tables, 16 figures, discussion added
Big data & microscopy
Creators: name: Giepmans, Ben N. G.
Publisher: name: F1000Research
Year: 2015

description: www.nanotomy.org Published data open access UMCG hosts the world-largest open access EM data.

Revolutions in computer sciences and microscopy allow data-acquisition/ sharing of complete LM or EM samples. Big data handling/ sharing is lacking behind other fields. Use local solutions to certify website, include metadata, make searchable engines.
Astaxanthin extraction from shrimp shell wastes and its potential as a gold-fish feed
Creators: name: Habibi, Nazima
name: Al-Salameen, Fadila
Publisher: name: figshare
Year: 2021
Subjects: Biological Techniques

description: Shrimp shells are important and natural source of bioactive astaxanthin. In the present study we report an eco-friendly method of astaxanthin extraction in coconut oil and its utilization as a feed for gold-fish. Shrimp shell wastes (head and carapace) were collected from India (three States) and Kuwait. Dried powder of shell waste was added to coconut oil and boiled at 90±2°C. Supernatant containing astaxanthin was filtered and estimated spectrophotometrically at 487nm.Significantly different (p=0.00) amounts of astaxanthin were recovered from Kuwaiti (34.21 μg/g of dry waste) and Indian (32.86 μg/g of dry waste) samples. Feed composed of the extract (100gms gelatin + 10ml oil extract (ca.5.0μg astaxanthin) + 5 g readymade fish food) was prepared and fed to gold-fishes for a period of two months. Feed supplemented with oil extract produced no harmful effect on the gold fishes.
A study of the decays of $S-$wave $\bar D^\ast K^\ast$ hadronic molecules: the scalar $X_0(2900)$ and its spin partners $X_{J(J=1,2)}$
Creators: name: Xiao, Cheng-Jian
name: Chen, Dian-Yong
name: Dong, Yu-Bing
name: Meng, Guang-Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work, we investigated the decays of the fully open-flavor tetraquark state $X_0(2900)$ which was observed by the LHCb Collaboration very recently. Here, the $X_0(2900)$ was assigned as a $S-$wave $\bar D^\ast K^\ast$ hadronic molecule with $I=0$, and the effective lagrangian approach was applied to estimate the partial decay widths. Moreover, we also predicted the decay behaviors of the other unobserved $X_{J(J=1,2)}$, which were the spin partners of the $X_0(2900)$ in the $S-$wave $\bar D^\ast K^\ast$ picture. It was pointed out that the $X_1$ state with $I=0$ was a broad state with the width more than one hundred MeV, while another $X_2$ state with $I=0$ was a narrow state with the width approaching half of that for the $X_0(2900)$. In addition, our results also showed that the $\bar D^\ast K$ mode was expected to be the dominant decay mode for both $X_1$ and $X_2$. Searching for those unobserved $X_{J(J=1,2)}$ in the future experiments might be helpful to understand the nature of $X_0(2900)$.
Extreme sub-wavelength atom localization via coherent population trapping
Creators: name: Agarwal, Girish S.
name: Kapale, Kishore T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate an atom localization scheme based on monitoring of the atomic coherences. We consider atomic transitions in a Lambda configuration where the control field is a standing wave field. The probe field and the control field produce coherence between the two ground states. We show that this coherence has the same fringe pattern as produced by a Fabry-Perot interferometer and thus measurement of the atomic coherence would localize the atom. Interestingly enough the role of the cavity finesse is played by the ratio of the intensities of the pump and probe. This is in fact the reason for obtaining extreme subwavelenth localization. We suggest several methods to monitor the produced localization.
description: 6 pages, 5 figures
How to produce a net shape Thermoplastic Composite part in one minute with the QSP
Creators: name: JOLLIVET, Thomas
Publisher: name: Zenodo
Year: 2019
Subjects: composite, thermoplastic, high rate manufacturing, low cost, innovation, netshape

description: Seminar on composite materials in Thailand:
 Presentation of the use of thermoplastic composites in the automotive and aeronautical sectors for high rate production. An illustration is given on the window frames designed and manufactured in the SHERLOC QSP project.