cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
[виртуальный] Центр компетенций электронных коммуникаций (ЦКЭК)
Creators: name: Царев, Владимир Петрович
Publisher: name: Zenodo
Year: 2021

description: Методический сектор

гипертека

Гипертекстовый ликбез

генезис ЭП (версионность)

дублированное инфорепетиторство

DOI

Сектор инструментария

формулы (MathML)

букмарклеты (закладурки)

Zenodo

shortDOI Service
New York Times Upshot/Siena College: October 2018 Iowa 01 Poll
Creators: name: New York Times
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Likelihood of voting in 2018 election (2); vote for Democrat/Republican for Congress (1); Iowa Congressional District 01 (1); Democratic Candidate Abby Finkenauer (1); Republican Candidate Rod Blum (1); opinion of various public figures (2); respondent would like Democrats/Republicans to control House of Representatives (1); President Donald Trump job performance (1); political partisanship (1).
Horndeski stars
Creators: name: Barranco, Juan
name: Chagoya, Javier
name: Diez-Tejedor, Alberto
name: Niz, Gustavo
name: Roque, Armando A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We establish the existence of time-dependent solitons in a modified gravity framework, which is defined by the low energy limit of theories with a weakly broken galileon symmetry and a mass term. These are regular vacuum configurations of finite energy characterized by a single continuous parameter representing the amplitude of the scalar degree of freedom at the origin. When the central field amplitude is small the objects are indistinguishable from boson stars. In contrast, increasing the central value of the amplitude triggers the effect of higher derivative operators in the effective theory, leading to departures from the previous solutions, until the theory becomes strongly coupled and model-dependent. The higher order operators are part of the (beyond) Horndeski theory, hence the name of the compact objects. Moreover, a remnant of the galileon non-renormalization theorem guarantees that the existence and properties of these solutions are not affected by quantum corrections. Finally, we discuss the linear stability under small radial perturbations, the mass-radius relation, the compactness, the appearance of innermost stable circular orbits and photon spheres, and some astrophysical signatures (accretion disks, gravitational radiation and lensing) that may be relevant to falsify the model.
description: 49+1 pages, 17 figures, 2 tables. To appear in JCAP
[виртуальный] Центр компетенций электронных публикаций (ЦКЭП)
Creators: name: Царев, Владимир Петрович
Publisher: name: Zenodo
Year: 2020

description: Методический сектор гипертека Гипертекстовый ликбез генезис ЭП (версионность) дублированное инфорепетиторство DOI Сектор инструментария формулы (MathML) букмарклеты (закладурки) Zenodo shortDOI Service
description: {"references": ["https://doi.org/10.5281/zenodo.3948536"]}
Non Destructive Surface and Sub-surface Material Analysis using Scanning SQUID Magnetic Microscope
Creators: name: Adamo, Maria
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2008

description: Non Destructive Testing (NDT) based on magnetic technique for the investigation of surface and sub-surface material properties is carried out using a room-temperature sample Scanning Magnetic Microscope. The performances of such instrument are well suited in the field of non destructive evaluation, thanks to the good combination of the spatial resolution and the magnetic field sensitivity of its own superconducting magnetic sensor.
The aim of this work is to show the capability and the advantages of the NDT technique based on Superconducting Quantum Interference Device (SQUID) sensors. We start by describing our Scanning SQUID Microscope in terms of its performances, the different non destructive techniques we can apply to perform the measurements, and the efforts we have done to improve its capability to detect weak magnetic field variations.
Two main applications are presented. On of this is based on the high magnetic field sensitivity of the SQUID sensor at low frequencies, and it consists to excite the sample with an alternating magnetic field (AC). This technique is applied to detect subsurface flaws in paramagnetic samples, for instance, in multilayer structures of aeronautical interest. The other field of application concerns the capability of the sensor to detect, with high spatial resolution, the direct magnetic field (DC) distribution on ferromagnetic samples, due to their residual magnetization. In this way, we can visualize magnetic domain structures of ferromagnetic particles. This capability is also exploited to evaluate the changing of magnetic field distribution in proximity of crack initialization on structural steels, subjected to fatigue cycles.
Proper Motions of OH Masers and Magnetic Fields in Massive Star-Forming Regions
Creators: name: Fish, Vincent L.
name: Reid, Mark J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present data of proper motions of OH masers in the massive star-forming regions ON 1, K3-50, and W51 Main/South. OH maser motions in ON 1 are consistent with expansion at approximately 5 km/s, likely tracing the expanding ultracompact H II region. Motions in K3-50 are faster and may be indicating the final stages of OH maser emission in the source, before the OH masers turn off as the H II region transitions from the ultracompact to the compact phase. W51 South shows indications of aspherical expansion, while motions in W51 Main are more difficult to interpret. Nevertheless, it appears that the relative projected separation between W51 Main and W51 South is decreasing, corresponding to an estimate of enclosed mass of at least 1500 solar masses, consistent with estimates derived from millimeter-wavelength dust emission. We confirm the ~20 mG magnetic fields previously seen in W51 Main, which may represent the upper end of the density range allowable for 1665 MHz maser emission. Magnetic field strengths and directions, obtained from Zeeman splitting, in each source are consistent with values obtained in the first epoch four to nine years ago.
description: 16 pages using emulateapj.cls including 17 figures and 5 tables, accepted to ApJ
|V_{cd}|, |V_{cs}| and f_{D_s} from (semi) leptonic $D_{(s)}$-decays : signals of New Physics ?
Creators: name: Narison, Stephan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We confront the recent improved measurements of the D_{(s)} (semi) leptonic decays with lattice QCD (LQCD) with n_f=3 flavours and QCD spectral sum rules (QSSR) predictions. D\toμν_μleptonic width data compared with theoretical determinations of f_D, leads to the value of the CKM mixing angle : |V_cd|= 0.230 (10)_exp (9)_th. Measured ratio of the D semi-leptonic widths combined with LQCD and QSSR predictions leads to the average |V_cd|/|V_cs|= 0.2175(88), and then to |V_cs|= 1.068(47). We consider the previous determinations as improvements of the existing estimates. Using the average data of the D_s\to μν_μ(resp. D_s\to τν_τ) branching ratios, one obtains : |V_cs|f_{D_s}^μ= (259 +- 12) {MeV} (resp) |V_cs|f_{D_s}^τ= (274 +- 13) {MeV}, which can be compared with the average of the Standard Model (SM) values from LQCD and QSSR f_{D_s}=(240 +- 7) MeV. If one uses the present determination of |V_cs|, there is an agreement with the SM prediction within 1σ. If instead, we impose the unitarity constraint |V_cs|< 1, or assume (as frequently done) |V_cs|=|V_ud|, we would obtain a deviation from the SM expectations ranging from 1.5 to 3 σ, eventually signaling some New Physics beyond the SM.
description: 5 pages, 5 tables, no figure, slight changes, version to appear in PLB
Modular Curves and the Refined Distance Conjecture
Creators: name: Klaewer, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We test the refined distance conjecture in the vector multiplet moduli space of 4D $\mathcal{N}=2$ compactifications of the type IIA string that admit a dual heterotic description. In the weakly coupled regime of the heterotic string, the moduli space geometry is governed by the perturbative heterotic dualities, which allows for exact computations. This is reflected in the type IIA frame through the existence of a K3 fibration. We identify the degree $d=2N$ of the K3 fiber as a parameter that could potentially lead to large distances, which is substantiated by studying several explicit models. The moduli space geometry degenerates into the modular curve for the congruence subgroup $Γ_0(N)^+$. In order to probe the large $N$ regime, we initiate the study of Calabi-Yau threefolds fibered by general degree $d>8$ K3 surfaces by suggesting a construction as complete intersections in Grassmann bundles.
description: 44 pages, 10 figures, comments welcome; v2: references added, improved discussion of log-scaling
Abundance analysis of seven delta Scuti Stars
Creators: name: Fossati, L.
name: Kolenberg, K.
name: Reegen, P.
name: Weiss, W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The current knowledge of the abundance pattern in delta Scuti stars is based on the analysis of just a few field stars. We aim to determine the general chemical properties of the atmospheres of delta Scuti stars based on a statistically relevant sample of stars and will investigate whether the abundance pattern is close to solar, an assumption generally made for pulsation models. We have analysed high-resolution, high signal-to-noise ratio spectra of seven field delta Scuti stars. We derived the fundamental parameters and the photospheric abundances and compared them to a similar sample of cluster delta Scuti stars. With the use of a t-test we demonstrated that there is no difference between the two samples, which allows us to merge them, resulting in a sample of fifteen delta Scuti stars. We did not find any substantial difference between the abundance pattern of our sample of delta Scuti stars and a sample of normal early A- and late F-type stars. One field star in our sample, HD 124953, is most likely a pulsating Am star.
description: accepted by Astronomy & Astrophysics
The peculiar WAT NGC 2329 with Seyfert/FR I-like radio lobes
Creators: name: Das, Soumyadeep
name: Kharb, Preeti
name: Morganti, Raffaella
name: Nandi, Sumana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the complex radio properties of the radio galaxy NGC 2329 that resides in the centre of the galaxy cluster Abell 569. For this study, we have used archival data from the Very Large Array (VLA) at various resolutions and frequencies, as well as the Very Long Baseline Array (VLBA). While the wide-angle tailed (WAT) Fanaroff-Riley type I (FR I) radio morphology of the source has been discussed widely in the literature, the nature of the inner lobes has not been as widely discussed. In particular, we note that the inner lobes resemble the bubble-like radio structures observed in Seyfert galaxies. Polarization-sensitive data from the VLA clearly show magnetic field structures consistent with FR Is for the outer lobes and Seyferts for the inner lobes in NGC 2329. FR Is are classified as radio-loud (RL) active galactic nuclei (AGN) and Seyferts as radio-quiet (RQ) AGN, making this source unique. The VLBA shows a one-sided radio jet suggesting a relativistic pc-scale outflow, leading into the inner lobes. Electron lifetime estimates suggest that the outer FR I-like lobes are nearly twice as old ($\sim$45 Myr) as the inner Seyfert-like lobes ($\sim$25 Myr). Gas inflow in this merging cluster seems to have rejuvenated the AGN about $\sim$25 Myr ago, and may have caused a change in the accretion disc state. The complex composite radio morphology of NGC 2329 suggests that the RL/RQ dichotomy is a function of time in the lifecycle of an AGN.
description: 12 pages, 8 figures, 3 tables. Published in the Monthly Notices of the Royal Astronomical Society
A Catalog of Absorption Lines in Eight HST/STIS E230M 1.0 < z < 1.7 Quasar Spectra
Creators: name: Milutinovic, N.
name: Misawa, T.
name: Lynch, R. S.
name: Masiero, J. R.
name: Palma, C.
name: Charlton, J. C.
name: Kirkman, D.
name: Bockenhauer, S.
name: Tytler, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have produced a catalog of line identifications and equivalent width measurements for all absorption features in eight ultraviolet echelle quasar spectra. These spectra were selected as having the highest signal-to-noise among the HST/STIS spectra obtained with the E230M grating. We identify 56 metal-line systems toward the eight quasars, and present plots of detected transitions, aligned in velocity-space. We found that about 1/4 - 1/3 of the features in the Lya forest region, redward of the incidence of the Lyb forest, are metal lines. High ionization transitions are common. We see both O VI and C IV in 88 - 90% of the metal-line systems for which the spectra cover the expected wavelength. Si III is seen in 58%, while low ionization absorption in C II, Si II, and/or Al II is detected in 50% of the systems for which they are covered. This catalog will facilitate future studies of the Lya forest and of metal-line systems of various types.
description: 13 pages, 2 figures, submitted to Monthly Notices of the Royal Astronomical Society, a complete version with the appendix and all figures is available at http://www.astro.psu.edu/users/misawa/pub/Paper/qalcat.pdf.gz
Investigating the Relative Gas and Small Dust Grain Surface Heights in Protoplanetary Disks
Creators: name: Rich, Evan A.
name: Teague, Richard
name: Monnier, John D.
name: Davies, Claire L.
name: Bosman, Arthur
name: Harries, Tim J.
name: Calvet, Nuria
name: Adams, Fred C.
name: Zhu, Zhaohuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Dust evolution in protoplanetary disks from small dust grains to pebbles is key to the planet formation process. The gas in protoplanetary disks should influence the vertical distribution of small dust grains ($\sim$1 $μm$) in the disk.Utilizing archival near-infrared polarized light and millimeter observations, we can measure the scale height and the flare parameter $β$ of the small dust grain scattering surface and $^{12}$CO gas emission surface for three protoplanetary disks IM Lup, HD 163296, and HD 97048 (CU Cha). For two systems, IM Lup and HD 163296, the $^{12}$CO gas and small dust grains at small radii from the star have similar heights but at larger radii ($>$100 au) the dust grain scattering surface height is lower than the $^{12}$CO gas emission surface height. In the case of HD 97048, the small dust grain scattering surface has similar heights to the $^{12}$CO gas emission surface at all radii. We ran a protoplanetary disk radiative transfer model of a generic protoplanetary disk with TORUS and showed that there is no difference between the observed scattering surface and $^{12}$CO emission surface. We also performed analytical modeling of the system and found that gas-to-dust ratios larger than 100 could explain the observed difference in IM Lup and HD 163296. This is the first direct comparison of observations of gas and small dust grain heights distribution in protoplanetary disks. Future observations of gas emission and near-infrared scattered light instruments are needed to look for similar trends in other protoplanetary disks.
description: Accepted ApJ, 13 pages, 3 figures, 4 tables
Leo V: A Companion of a Companion of the Milky Way Galaxy
Creators: name: Belokurov, V.
name: Walker, M. G.
name: Evans, N. W.
name: Faria, D. C.
name: Gilmore, G.
name: Irwin, M. J.
name: Koposov, S.
name: Mateo, M.
name: Olszewski, E.
name: Zucker, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of a new Milky Way dwarf spheroidal galaxy in the constellation of Leo identified in data from the Sloan Digital Sky Survey. Leo V lies at a distance of about 180 kpc, and is separated by about 3 degrees from another recent discovery, Leo IV. We present follow-up imaging from the Isaac Newton Telescope and spectroscopy from the Hectochelle fiber spectrograph at the Multiple Mirror Telescope. Leo V's heliocentric velocity is 173.4 km/s, which is offset by about 40 km/s from that of Leo IV. A simple interpretation of the kinematic data is that both objects may lie on the same stream, though the implied orbit is only modestly eccentric (e = 0.2)
description: Submitted to ApJ (Letters)
El-CID: A filter for Gravitational-wave Electromagnetic Counterpart Identification
Creators: name: Chatterjee, Deep
name: Narayan, Gautham
name: Aleo, Patrick D.
name: Malanchev, Konstantin
name: Muthukrishna, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: As gravitational-wave (GW) interferometers become more sensitive and probe ever more distant reaches, the number of detected binary neutron star mergers will increase. However, detecting more events farther away with GWs does not guarantee corresponding increase in the number of electromagnetic counterparts of these events. Current and upcoming wide-field surveys that participate in GW follow-up operations will have to contend with distinguishing the kilonova from the ever increasing number of transients they detect, many of which will be consistent with the GW sky-localization. We have developed a novel tool based on a temporal convolutional neural network architecture, trained on sparse early-time photometry and contextual information for Electromagnetic Counterpart Identification (El-CID). The overarching goal for El-CID is to slice through list of new transient candidates that are consistent with the GW sky localization, and determine which sources are consistent with kilonovae, allowing limited target-of-opportunity resources to be used judiciously. In addition to verifying the performance of our algorithm on an extensive testing sample, we validate it on AT2017gfo - the only EM counterpart of a binary neutron star merger discovered to date - and AT2019npv - a supernova that was initially suspected as a counterpart of the gravitational-wave event, GW190814, but was later ruled out after further analysis.
description: 17 pages, 10 figures, accepted in MNRAS
Spin-phonon coupling, q-dependence of spin excitations and high-T$_C$ superconductivity from band models
Creators: name: Jarlborg, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An understanding of spin excitations in cuprates is essential since the mechanism of high-T$_C$ superconductivity might be linked to spin fluctuations. Band calculations for long "1-dimensional" unit cells of La$_2$CuO$_4$ show that the coupling between antiferromagnetic spin waves and phonons is larger for distortions of oxygens than for Cu or La. When this result is applied to a 2-dimensional, free-electron like band, it leads to a q-dependent spin excitation spectrum in good agreement with recent experiments. It is argued that important parameters for spin-phonon coupling, which comes out from the comparison between experiment and theory, are relevant for the mechanism of superconductivity, and are large enough to explain a high T$_C$.
description: (1 figure, 1 Table, 4 pages)
On the Use of Blanketed Atmospheres as Boundary Conditions for Stellar Evolutionary Models
Creators: name: VandenBerg, Don A.
name: Edvardsson, Bengt
name: Eriksson, Kjell
name: Gustafsson, Bengt
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Stellar models have been computed for stars having [Fe/H] = 0.0 and -2.0 to determine the effects of using boundary conditions derived from the latest MARCS model atmospheres. The latter were fitted to the interior models at both the photosphere and at tau = 100, and at least for the 0.8-1.0 solar mass stars considered here, the resultant evolutionary tracks were found to be nearly independent of the chosen fitting point. Particular care was taken to treat the entire star as consistently as possible; i.e., both the interior and atmosphere codes assumed the same abundances and the same treatment of convection. Tracks were also computed using either the classical gray T(tau,T_eff) relation or that derived by Krishna Swamy (1966) to derive the boundary pressure. The latter predict warmer giant branches (by ~150 K) at solar abundances than those based on gray or MARCS atmospheres, which happens to be in good agreement with the inferred temperatures of giants in the open cluster M67 from the latest (V-K)-T_eff relations. Most of the calculations assumed Z=0.0125 (Asplund et al.), though a few models were computed for Z=0.0165 (Grevesse & Sauval) to determine the dependence of the tracks on Z_\odot. Grids of "scaled solar, differentially corrected" (SDC) atmospheres were also computed to try to improve upon theoretical MARCS models. When they were used as boundary conditions, the resultant tracks agreed very well with those based on a standard scaled-solar (e.g., Krishna Swamy) T(tau,T_eff) relation, independently of the assumed metal abundance. Fits of isochrones to the C-M diagram of the [Fe/H] = -2 globular cluster M68 were examined, as was the possibility that the mixing-length parameter varies with stellar parameters.
description: 54 pages, including 20 figures and 3 tables; accepted (July 2007) for publication in the Astrophysical Journal
Bridge Successive States for a Complex System with Evolutionary Matrix
Creators: name: Yang, Huijie
name: Yan, Shuang
name: Gu, Changgui
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 490104
subject: Complex systems

description: A concept called temporal network of evolutionary matrices is proposed to identify the evolutionary laws for complex systems. The key idea is to separate the trajectory into overlapping segments. The time step between each pair of successive states is assumed to be so short that they can be bridged by a matrix. And the time duration covered by the segment is assumed to be so short that the matrices bridging the pairs of successive states are identical, called evolutionary matrix. The trajectory is them mapped to a temporal network of evolutionary matrices (”bridges”), describing the evolutionary law. Investigations on the series generated with the fractional Brownian motion, and the records for stock markets distributed over the world show that, there exist in all the evolutionary angle series long?range correlations. For the fBm increment series, the series generated with the Heston model, and stock index series, the influences of variables on themselves and the influences between adjacent variables form the backbone of the temporal networks. Non-adjacent impacts can fluctuate simultaneously. The markets in Japan as the center affects Mainland China and is unilaterally affected by the America and Mainland China. After financial crisis, there appear some abrupt and large fluctuations of the evolutionary matrices for the components of the Dow Jones stock market.
Control of breast cancer cell growth by adipocyte-released factors
Creators: name: D'Esposito, Vittoria
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Obesity is one of the most challenging and growing health problems, worldwide. Epidemiologic studies now provide compelling evidence that obesity is a risk factor for both cancer incidence and mortality. In particular, obesity increases rates of breast cancer in postmenopausal women and is associated with poorer survival and increased recurrence of disease, regardless the menopausal status. It is now becoming clear that adipocytes, which represent very abundant cell types surrounding cancer cells, particularly in the mammary gland, could influence several aspects of tumorigenesis, from promoting local invasion to angiogenesis and metastasis. However, the molecular mechanisms involved in the adipocyte control of the malignant phenotype remain poorly understood. I have studied the mechanisms by which adipocytes may integrate metabolic and nutritional inputs and produce signals affecting breast cancer cell phenotypes. I have obtained evidence that conditioned media from 3T3-L1 cells induce growth of MCF7 cells, in a time-dependent manner. In particular, conditioned media from fully differentiated adipocytes are 2-fold more effective than conditioned media from pre-adipocytes in inducing MCF7 growth. Cell cycle analysis by flow cytometry revealed that these changes are due to reduced apoptosis instead of increased proliferation. Pre-incubation with low glucose medium or insulin reduces the effect of adipocyte conditioned media on MCF7 growth. Cytokines/growth factors screening of conditioned media from pre-adipoctyte and adipocyte, cultured in presence or in absence of low glucose medium or insulin, revealed that KC, RANTES and IGF1 could be good candidates in mediating pro-tumorigenic effect of adipocyte conditioned media. Moreover, IGF1R inhibitor AG1024 is able to revert adipocyte conditioned media effect. In conclusion, adipocyte-derived factors promote breast cancer cell growth inhibiting the apoptosis. This effect is more evident in adipocytes than in pre-adipocytes and is altered by insulin or nutritional factors such as glucose. The effects are likely mediated by IGF-1.
LA DELIBAZIONE DELLE SENTENZE DI NULLITA' MATRIMONIALE
Creators: name: Giliberti, Maria
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: LA DELIBAZIONE DELLE SENTENZE DI NULLITA' MATRIMONIALE E IL PROCEDIMENTO DI CIRCOLAZIONE DI TALI SENTENZE ALLA LUCE DELLA LEGGE DI RIFORMA DEL DIRITTO INTERNAZIONALE PRIVATO LEGGE 218/95.
Spectral Properties of delta-Plutonium: Sensitivity to 5f Occupancy
Creators: name: Zhu, Jian-Xin
name: McMahan, A. K.
name: Jones, M. D.
name: Durakiewicz, T.
name: Joyce, J. J.
name: Wills, J. M.
name: Albers, R. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By combining the local density approximation (LDA) with dynamical mean field theory (DMFT), we report a systematic analysis of the spectral properties of $δ$-plutonium with varying $5f$ occupancy. The LDA Hamiltonian is extracted from a tight-binding (TB) fit to full-potential linearized augmented plane-wave (FP-LAPW) calculations. The DMFT equations are solved by the exact quantum Monte Carlo (QMC) method and the Hubbard-I approximation. We have shown for the first time the strong sensitivity of the spectral properties to the $5f$ occupancy, which suggests using this occupancy as a fitting parameter in addition to the Hubbard $U$. By comparing with PES data, we conclude that the ``open shell'' $5f^{5}$ configuration gives the best agreement, resolving the controversy over $5f$ ``open shell'' versus ``close shell'' atomic configurations in $δ$-Pu.
description: 6 pages, 2 embedded color figures, to appear in Physical Review B
Tidal deformability of strange stars and the GW170817 event
Creators: name: Lourenço, Odilon
name: Lenzi, César H.
name: Dutra, Mariana
name: Ferrer, Efrain J.
name: de la Incera, Vivian
name: Paulucci, Laura
name: Horvath, J. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work we consider strange stars formed by quark matter in the color-flavor-locked (CFL) phase of color superconductivity. The CFL phase is described by a Nambu-Jona-Lasinio model with four-fermion vector and diquark interaction channels. The effect of the color superconducting medium on the gluons are incorporated into the model by including the gluon self-energy in the thermodynamic potential. We construct parametrizations of the model by varying the vector coupling $G_V$ and comparing the results to the data on tidal deformability from the GW170817 event, the observational data on maximum masses from massive pulsars such as the MSP J0740+6620, and the mass/radius fits to NICER data for PSR J003+0451. Our results points out to windows for the $G_V$ parameter space of the model, with and without gluon effects included, that are compatible with all these astrophysical constraints, namely, $0.21
description: 9 pages, 8 figures. Accepted for publication in Phys. Rev. D
Anisotropic superconducting properties of aligned Sm$_{0.95}$La$_{0.05}$FeAsO$_{0.85}$F$_{0.15}$ microcrystalline powder
Creators: name: Chang, B. C.
name: Hsu, C. H.
name: Hsu, Y. Y.
name: Wei, Z.
name: Ruan, K. Q.
name: Li, X. G.
name: Ku, H. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Sm$_{0.95}$La$_{0.05}$FeAsO$_{0.85}$F$_{0.15}$ compound is a quasi-2D layered superconductor with a superconducting transition temperature T$_c$ = 52 K. Due to the Fe spin-orbital related anisotropic exchange coupling (antiferromagnetic or ferromagnetic fluctuation), the tetragonal microcrystalline powder can be aligned at room temperature using the field-rotation method where the tetragonal $\it{ab}$-plane is parallel to the aligned magnetic field B$_{a}$ and $\it{c}$-axis along the rotation axis. Anisotropic superconducting properties with anisotropic diamagnetic ratio $χ_{c}/χ_{ab}\sim$ 2.4 + 0.6 was observed from low field susceptibility $χ$(T) and magnetization M(B$_{a}$). The anisotropic low-field phase diagram with the variation of lower critical field gives a zero-temperature penetration depth $λ_{c}$(0) = 280 nm and $λ_{ab}$(0) = 120 nm. The magnetic fluctuation used for powder alignment at 300 K may be related with the pairing mechanism of superconductivity at lower temperature.
description: 4 pages, 6 figures
Pylot: A Modular Platform for Exploring Latency-Accuracy Tradeoffs in Autonomous Vehicles
Creators: name: Gog, Ionel
name: Kalra, Sukrit
name: Schafhalter, Peter
name: Wright, Matthew A.
name: Gonzalez, Joseph E.
name: Stoica, Ion
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: We present Pylot, a platform for autonomous vehicle (AV) research and development, built with the goal to allow researchers to study the effects of the latency and accuracy of their models and algorithms on the end-to-end driving behavior of an AV. This is achieved through a modular structure enabled by our high-performance dataflow system that represents AV software pipeline components (object detectors, motion planners, etc.) as a dataflow graph of operators which communicate on data streams using timestamped messages. Pylot readily interfaces with popular AV simulators like CARLA, and is easily deployable to real-world vehicles with minimal code changes. To reduce the burden of developing an entire pipeline for evaluating a single component, Pylot provides several state-of-the-art reference implementations for the various components of an AV pipeline. Using these reference implementations, a Pylot-based AV pipeline is able to drive a real vehicle, and attains a high score on the CARLA Autonomous Driving Challenge. We also present several case studies enabled by Pylot, including evidence of a need for context-dependent components, and per-component time allocation. Pylot is open source, with the code available at https://github.com/erdos-project/pylot.
description: ICRA 2021; 8 pages, 4 figures, 1 table
Study efficiency of Cinnamomum cassia essential oils in Coccidiosis prevention caused by E. Tenella
Creators: name: Kanokchon Intarawimol
name: Taweesak Songserm
name: Phakka-On Akaramathurakul
name: Surapan Jitviriyanon
name: Nuanchan Paraksa
Publisher: name: Faculty of Agriculture
Year: 2019
Subjects: Coccidiosis prevention, Cassia oil product, broilers

description: Khon Kaen Agriculture Journal, 47, 3, 617-626
Realization and characterization of silicon nitride thin films embedding Si nanoparticles
Creators: name: Esposito, Emilia Maria
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: This thesis concerns the realization and characterization of silicon nitride thin films embedding Si nanoparticles. The objectives are: 1) to investigate convenient fabrication procedures in application perspective, 2) to improve upon the characterization techniques regarding this material class, and 3) to possibly provide a proof of concept study of quantum confinement to support the implementation of new-generation optoelectronic devices (among which, in particular, the all-silicon tandem solar cells).
Different fabrication approaches have been followed: a simpler in-situ route by Plasma Enhanced Chemical Vapour Deposition and a procedure involving a post-deposition annealing step. The samples have been characterized through photoluminescence (at different excitation energies and temperatures), extensive Raman spectroscopy, FTIR, optical absorption, and EFTEM.
The research activity has been carried out at ENEA - Portici Research Center in the “Photovoltaic Technologies Section” (now “Portici Technical Unit”).
Inside the function of the 67 kDa laminin receptor (67LR): a new promising target for cancer drug discovery by structure-based virtual screening
Creators: name: Pesapane, Ada
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: The 67 kDa laminin receptor (67LR) is a non-integrin cell-surface receptor for the extracellular matrix derived from the dimerization of a 37 kDa cytosolic precursor (37LRP). 67LR is highly expressed in human cancers and widely recognized as a molecular marker of metastatic aggressiveness.
Phosphoprotein enriched in diabetes/phosphoprotein enriched in astrocytes (PED/PEA-15) is an anti-apoptotic protein whose expression is increased in several human cancers. In addition to apoptosis, PED/PEA-15 is involved in the regulation of other major cellular functions, including cell adhesion, migration, proliferation and glucose metabolism.
A yeast two-hybrid screening identified 67LR as a PED/PEA-15 interacting partner. PED/PEA-15 molecular interaction with 67LR was confirmed by pull-down experiments on lysates of PED/PEA-15 transfected HEK-293 cells. Overexpressed and endogenous PED/PEA-15 co-immunoprecipitated with 67LR in PED/PEA-15 transfected HEK-293 cells and in U-373 glioblastoma cells, respectively.
PED/PEA-15 overexpression significantly increased 67LR-mediated HEK-293 cell adhesion and migration to laminin that, in turn, determined PED/PEA-15 phosphorylation both in Ser-104 and Ser-116, through CamKII and PKC activation, thus enabling cell proliferation and resistance to apoptosis.
Therefore, 67LR binding to laminin induces, through interaction with PED/PEA-15, signals that may be crucial for tumor cell survival in a poor microenvironment. Indeed, high 67LR expression predicts for a more aggressive disease in several types of cancer.
These considerations prompted us to search for small molecules that might target 67LR activities. Since cancer cells overexpress 67LR, these compounds are expected to be cancer cell specific and minimally toxic. We conducted a computational screening of a diversity library of small molecules using the recently solved 67LR crystal structure, focusing on residues showed to be important for laminin binding. This analysis identified a lead compound that was characterized for its effects. This lead compound, NSC47924, could be the basis for the development of a new class of anti-cancer drugs, specifically targeting tumor invasion and metastasis.
K-band Imaging of strong CaII-absorber host galaxies at z~1
Creators: name: Hewett, Paul
name: Wild, Vivienne
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present K-band imaging of fields around 30 strong CaII absorption line systems, at 0.7
description: 18 pages, 5 figures. Accepted by MNRAS. Version with full resolution figures available at http://www.mpa-garching.mpg.de/~vwild/CaII/CaII_ukirt.pdf
On Quantifying Literals in Boolean Logic and Its Applications to Explainable AI
Creators: name: Darwiche, Adnan
name: Marquis, Pierre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Databases (cs.DB)
subject: Machine Learning (cs.LG)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Quantified Boolean logic results from adding operators to Boolean logic for existentially and universally quantifying variables. This extends the reach of Boolean logic by enabling a variety of applications that have been explored over the decades. The existential quantification of literals (variable states) and its applications have also been studied in the literature. In this paper, we complement this by studying universal literal quantification and its applications, particularly to explainable AI. We also provide a novel semantics for quantification, discuss the interplay between variable/literal and existential/universal quantification. We further identify some classes of Boolean formulas and circuits on which quantification can be done efficiently. Literal quantification is more fine-grained than variable quantification as the latter can be defined in terms of the former. This leads to a refinement of quantified Boolean logic with literal quantification as its primitive.
description: Published in the Journal of Artificial Intelligence Research (JAIR), volume 72, 2021
Using social network and semantic analysis to analyze online travel forums and forecast tourism demand
Creators: name: Colladon, A Fronzetti
name: Guardabascio, B
name: Innarella, R
Publisher: name: arXiv
Year: 2021
Subjects: subject: Econometrics (econ.EM)
subject: Computation and Language (cs.CL)
subject: Social and Information Networks (cs.SI)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences
subject: J.4; H.4.0; I.2.7

description: Forecasting tourism demand has important implications for both policy makers and companies operating in the tourism industry. In this research, we applied methods and tools of social network and semantic analysis to study user-generated content retrieved from online communities which interacted on the TripAdvisor travel forum. We analyzed the forums of 7 major European capital cities, over a period of 10 years, collecting more than 2,660,000 posts, written by about 147,000 users. We present a new methodology of analysis of tourism-related big data and a set of variables which could be integrated into traditional forecasting models. We implemented Factor Augmented Autoregressive and Bridge models with social network and semantic variables which often led to a better forecasting performance than univariate models and models based on Google Trend data. Forum language complexity and the centralization of the communication network, i.e. the presence of eminent contributors, were the variables that contributed more to the forecasting of international airport arrivals.
Avalanche statistics and time-resolved grain dynamics for a driven heap
Creators: name: Abate, A. R.
name: Katsuragi, H.
name: Durian, D. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We probe the dynamics of intermittent avalanches caused by steady addition of grains to a quasi-two dimensional heap. To characterize the time-dependent average avalanche flow speed v(t), we image the top free surface. To characterize the grain fluctuation speed dv(t), we use Speckle-Visibility Spectroscopy. During an avalanche, we find that the fluctuation speed is approximately one-tenth the average flow speed, and that these speeds are largest near the beginning of an event. We also find that the distribution of event durations is peaked, and that event sizes are correlated with the time interval since the end of the previous event. At high rates of grain addition, where successive avalanches merge into smooth continuous flow, the relationship between average and fluctuation speeds changes to dv Sqrt[v].
On the Coulomb-dipole transition in mesoscopic classical and quantum electron-hole bilayers
Creators: name: Ludwig, P.
name: Balzer, K.
name: Filinov, A.
name: Stolz, H.
name: Bonitz, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the Coulomb-to-dipole transition which occurs when the separation $d$ of an electron-hole bilayer system is varied with respect to the characteristic in-layer distances. An analysis of the classical ground state configurations for harmonically confined clusters with $N\leq30$ reveals that the energetically most favorable state can differ from that of two-dimensional pure dipole or Coulomb systems. Performing a normal mode analysis for the N=19 cluster it is found that the lowest mode frequencies exhibit drastic changes when $d$ is varied. Furthermore, we present quantum-mechanical ground states for N=6, 10 and 12 spin-polarized electrons and holes. We compute the single-particle energies and orbitals in self-consistent Hartree-Fock approximation over a broad range of layer separations and coupling strengths between the limits of the ideal Fermi gas and the Wigner crystal.
Ab initio determination of ultrahigh thermal conductivity in ternary compounds
Creators: name: Wu, Huan
name: Fan, Hang
name: Hu, Yongjie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Discovering new materials with ultrahigh thermal conductivity has been a critical research frontier and driven by many important technological applications ranging from thermal management to energy science. Here we have rigorously investigated the fundamental lattice vibrational spectra in ternary compounds and determined the thermal conductivity using a predictive ab initio approach. Phonon transport in B-X-C (X = N, P, As) groups is systematically quantified with different crystal structures and high-order anharmonicity involving a four-phonon process. Our calculation found an ultrahigh room-temperature thermal conductivity through strong carbon-carbon bonding up to 2100 W/mK beyond most common materials and the recently discovered boron arsenide. This study provides fundamental insight into the atomistic design of thermal conductivity and opens up opportunities in new materials searching towards complicated compound structures. DOI: 10.1103/PhysRevB.103.L041203
description: First submission on 28 January 2020; accepted 24 December 2020; published online 27 January 2021
A ²H-NMR study of lipid chain disorder in a model membrane : effect of integral peptide length
Creators: name: Macqueen, Robin Michael
Publisher: name: University of British Columbia
Year: 2010

description: Polypeptides of the form: Lys₂-Gly-Leu[sub n]-Lys₂-Ala-amide with n=16, 20 or 24, and of the form: Ac-Leu₁₀-Lys₂-Ala-amide, were mixed with perdeuterated potassium palmitate at peptide/lipid ratios of approximately 1:200 and 1:100. Potassium phosphate buffer (50mM) was added such that the water:lipid molar ratio was 7.75:1. ²H-NMR measurements were made on the samples at 49°C and 65°C. The effect of all peptides was to cause an increase in lipid chain order which varied linearly with concentration. This increase was manifested by an increase in average order parameter for the entire lipid chain of about 20%, from about .11 to .14.
Bianchi VI0 viscous fluid cosmology with magnetic field
Creators: name: Ribeiro, Marcelo Byrro
name: Sanyal, Abhik Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A spatially homogeneous Bianchi type VI0 model containing a viscous fluid in the presence of an axial magnetic field has been studied. A barotropic equation of state together with a pair of linear relations among the square root of matter density, shear scalar, and expansion scalar have been assumed. Solutions are obtained in the presence of a magnetic field, only in two special cases, which are comparatively simpler. The complete solutions for this model in the absence of a magnetic field are also obtained. The presence of a magnetic field in the former case however, does not in effect cause any major modification in the fundamental nature of the initial singularity of the expanding model.
description: 7 pages, 0 figures
title: Esttudo da voz verbal em kizómbò (H.16K)
Creators: name: Teca, Afonso
Publisher: name: University of Bayreuth
Year: 2019
Subjects: subject: Bantu
subject: Derivation
subject: Extensions
subject: Kikongo
subject: Kìzómbò
subject: Semantic roles Valency
subject: Syntactic roles
subject: Verb
subject: Voice
subject: 400

description: Este trabalho incide sobre a voz verbal em Kizómbò (H.16k).A preocupação consiste em entender e explicar a maneira como esta língua permite a oposição entre as vozes activa e passiva; como a recíproca e a reflexiva são expressas na língua, descrevendo os participantes.
Por conseguinte, o estudo explora os derivativos e a sua realização na língua. Em Kizómbò a voz verbal é obtida por meio da derivação de verbo para verbo. O verbo derivado é formado pelos derivativos conhecidos como extensões. Neste trabalho, as extensões são divididas em três grupos: o primeiro compreende aquelas extensões que rebaixam a valência, a saber: passiva, recíproca, reflexiva, estativa, mdia e potencial. O segundo agrupa as extensões que promovem a valência: aplicativa, causativa e impositiva. E o terceiro agrega aquelas extensões que os linguistas designam neutras: reversiva, iterativa, durativa, intensiva e reiterativa (Mchombo 2004: 110).
O trabalho é construído de dados recolhidos do nosso trabalho de campo, utilizando diferentes técnicas de colecta de dados, tais como questionário e entrevistas. Também fizemos a introspecção, a revisão documentária e a investigação na biblioteca. Diferentes quadros teóricos e analíticos, tais como o funcionalismo de Givón (2001a e b), o lexicalismo e realismo de Creissels (2006a e b) e a gramática da valência de Lucien Tesnière (1959), entre outros, foram utilizados para analisar os dados.
Os resultados mostram que a voz passiva usa duas extensões: -u- e -am-. Como redutor da  valência, comporta-se de forma assimétrica: o OD da voz activa tem o privilégio de ser promovido como sujeito, mas o sujeito da voz activa nunca se torna objecto de passiva. Neste caso, duas possibilidades são levantadas ou é rebaixado ou é eliminado. O Kìzómbò usa outras formas de expressar a passiva, que topicalizam o paciente. A extensão -an- da recíproca indica que a acção do verbo é performada mutuamente por um sujeito grupal. Mas hoje em dia, o prefixo -ki- da reflexiva é usado para exprimir a reciprocidade em Kizómbò. A aplicativa e a impositiva aumentam a valência para mais um argumento. Em termos descritivos, a causativa -is- tem as propriedades de causativizar os verbos transitivos adicionando um terceiro participante na estrutura de argumento. Os aspectos semânticos e discursivos da voz estão relacionados com o contexto de uso.